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Патент USA US3081898

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March 19, 1963
v.1. M. LAWSON
3,081,888
AUTOMATIC'STICK PLACER FOR LUMBER STACKS
Filed Feb. 1. 1960
6 Sheets-Sheet l
FIG.2
EL
INVENTOR.
Joseph M. Lawson
' WM$W
March 19, 1963
J. M. LAWSON
3,081,888
AUTOMATIC STICK PLACER FOR LUMBER STACKS
Filed Feb. 1, 1960
FIGB
6 Sheets-Sheet 2
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INVENTOR.
Joseph M. Lawson
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March 19, 1963
3,081 ,888
J. M. LAWSON
AUTOMATIC STICK PLACER FOR LUMBER STACKS
Filed Feb. 1, 1960
6 Sheets-Sheet 3
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INVENTCR.
Joseph M. Lawson
March 19, 1963
J. M. LAWSON
3,081,888
AUTOMATIC STICK PLACER FOR LUMBER STACKS
Filed Feb. 1, 1960
6 Sheets-Sheet 4
39
INVENTOR.
Joseph M. Lawson
WW
March 19, 1963
J. M. LAWSON
3,081,888 ,
AUTOMATIC; STICK PLACER FOR LUMBER smcxs
- Filed Feb.
1, 1960
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INVENTOR.
Joseph M. Lawson
March 19, 1963
J. M. LAWSON
3,081,888
AUTOMATIC STICK PLACER FOR LEJMBER STACKS
Filed Feb. 1, 1960
s Sheets-Sheet e
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INVENTOR.
Joseph M. Lawson
‘ BY
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3,081,888
Patented Mar. 1%, H953
.1.
2
a stick placing means which comprises a vertically recip
3,031,888
rocable carriage motivated for movement into deposit
AUTOMATIC STICK PLACER FGR
LUMBER STACKS
position by the entry of a tier or ?ight of lumber into the
Joseph hit. Lawson, Memphis, Tenn., assign-or to Lawson
area overlying the lumber stack upon which the tier or
flight is to be deposited, and which includes a series of
Stacker- Co, inc, Memphis, Tenn, a corporation of
Tennessee
Fitted Feb. i, 1966, Ser. No. 5,976
13 Ciaims. (Qt. 2l4—e)
longitudinally spaced apart magazines for retaining and
receiving spacing sticks.
This invention relates to certain new and useful im
a machine means coordinated with the vertical recipro
with mechanical lumber stacking devices and machines
cessively depositing an individual stick from the respec
tive magazines onto the upper face of the uppermost tier
of lumber when the carriage has been moved to deposit
A further object of the invention is to provide in such
10 cation of the carriage comprised in the machine for suc
provements particularly adapted for usage in connection
such as those shown in Patents Nos. 2,686,603 and
2,703,247, and in particular relates to a machine for auto
matically positioning sticks upon lumber stacks in order 15
to provide spacing vertically between horizontal layers or
tiers of lumber as they are placed upon such lumber
stacks, and accordingly this invention relates to an auto
matic stick placer adapted for use with lumber stacks.
position.
i
A ‘further object of the invention is to provide auto
matic means for depositing sticks successively upon tiers
or ?ights of lumber placed upon a lumber stack which
includes horizontally shiftable deposit means which are
It has long been recognized as desirable in the drying 20 coordinately operated in ‘conjunction with the reciprocal
movement of a vertically reciprocable carriage.
of lumber after the stacking of same, whether the drying
A further object of the invention is to provide such
is to be accomplished by kiln or by air drying, that there
means
for horizontal movement and deposit which may
should be provided spaces between the horizontal layers
be selectively locked out in order to prevent deposit from
or tiers of the lumber in such stack so that each of the
selected magazines.
successive lumber layers or tiers is vertically spaced above 25
A further object of the invention is to provide a stick
or away from the next adjacent layers or tiers.
placing machine adapted for ‘operation in coordination
In the process of stacking lumber by hand there is
with the stacking of lumber.
presented a double problem of labor and time which
A further object of the invention is to provide a new
requires the accuracy of the workmen to accurately place
and
novel lift means for a Vertically reciprocable car
the successive horizontal layers or tiers of lumber, and
riage.
intermediate the placing of such layers or tiers of lum
A further object of the invention is to provide a means
ber to interpose spacing elements, commonly called sticks.
of accurately placing a selected number of substantially
This practice of hand layering lumber in successive hori
uniform lumber spacing sticks in conjunction with the
zontal layers for stacks and successively interposing
spacing sticks by hand upon the upper surface of a com 35 stacking of lumber stacks; and
A further object of the invention is generally to im
pleted layer and prior to the introduction of the next
prove the design, construction and efficiency of vertically
successive layer has continued for many years, and in
reciprocable carriage means with which are associated
many places continues to the present time.
magazines for retaining and selectively depositing lumber
One of the problems of stacking lumber in the general
spacing sticks.
manner just described has been solved by the use of
mechanical lumber stackers, such as those shown in the
patents mentioned above, in which successive layers or
tiers of lumber are delivered by a machine onto the stack
and deposited there in orderly arrangement. Even, how
ever, with the usage of such lumber stackers as those
The means by which the" foregoing and other objects
of the present invention are accomplished and the man
ner of their accomplishment will be readily understood
from the following speci?cation upon reference to the
accompanying drawings, in which:
'
'FIG. 1 is a fragmentary top plan view of an embodi
mentioned above the practice of hand placing of spacing 45 ment
of the present invention.
sticks upon the successive layers of lumber has continued
FIG. 2 is a fragmentary rear view of the device as
seen in FIG. 1, with parts broken away ‘for illustration.
FIG. 3 is an end view of the device as shown in FIGS.
vice for placing spacing sticks which is adapted to be
1 and 2.
coordinated with the deposit of a layer of lumber in a 50
FIG. 4 is a fragmentary sectional view on an en
horizontal tier upon a stack of lumber. The present
larged
scale taken as on the line IV-IV of FIG. 1.
device is essentially adapted to be mechanically coordi
FIG. 5 is a fragmentary cross sectional view taken
nated with a mechanical lumber stacker such as of the
to be followed.
The present invention contemplates an automatic de
types mentioned in the patents de?ned above, although
as on the line V-V of FIGS. ‘1 and 2 on a scale similar
to the scale of FIG. 4.
FIG. 6 is a fragmentary sectional view on a similarly
enlarged scale taken as on the line VI——VI of FIG. '1.
FIG. 7 is a fragmentary cross sectional view taken as
on the line VII-VII of FIGS. 1 and 2.
In the usage of the present invention the considerable
time and labor heretofore involved in the placing of spac 60 FIG. 8 is a fragmentary cross sectional view illustrating
other features of the device taken as on the line
ing sticks is eliminated and the accuracy of the placement
VIII-NIH of FIGS. 1 and 2.
of the sticks as well as the selection of the desired num
FIG. 9 is a fragmentary top plan view at one corner
ber of sticks to be placed in conjunction with a specific
the present stick placing device may under desired cir
cumstances be adapted for usage in connection with lum
ber stacks in which the successive layers of lumber are
manually placed upon the stack.
layer of lumber is easily controlled.
The principal object of the present invention is to pro
vide an automatic means ‘for depositing a series of hori
zontally spaced sticks upon successive layers or tiers of
lumber deposited upon a stack of lumber and in coordi~
nation with the deposit of the lumber tiers upon said
stack successively.
A further object of the invention is to provide such
of the device illustrating the relationship between the
respective corners of the vertically reciprocable carriage
and the upright trackway supports.
FIG. 10 is a somewhat schematic and diagrammatic
side view illustrating the relationship of the stick placer
of the present invention to a lumber stacker just prior to
70 the entry of a ?ight of lumber into the area of the stick
placer.
FIG. 11 is a view similar to FIG. 10‘ illustrating the
A
tion, being suitably mounted upon an underlying support
3
relationship of the stick placer relative to the lumber
stacker ‘as the positioning of the lumber ?ight is con
tinued.
such ‘as the ground or a platform as indicated at 39 in
FIG. 3.
Guide members 37 extend vertically upwardly from
FIG. 12 is a further view similar to FIG. 10 illustrating
such support level 3.9, and at their upper ends are re
the relationship of the parts of the stick placer as the
?ight of lumber is being deposited upon the lumber
stack.
spectively interconnected by top members 411.
Guide
members 37 are spaced apart so as to embrace the width
of carriage 21, with suitable shoe and stop means being
‘FIG. 13 is a view similar to‘FIG. 10‘ illustrating the
connected to the front and rear ‘beams 23, and other simi
relationship of the elements with the lumber placing forks
of the lumber stacker fully retracted and preparatory to
picking up the next ?ight ‘of lumber.
lar elements connected to outer beams 26 for embnacing
a part of the vertical guide members 37, such as the in
nermost of the vertical ?anges thereof, for guiding the
carriage 21 in its reciprocating movement relative to
the frames 35, 36
FIG. 14 is a schematic and diagrammatic rear view
in fragmentary form illustrating the relationship of the
parts as seen in FIG. 10‘.
Carriage 21 is connected with frames 35, 36 by chains
FIG. 15 is a view similar to FIG. 14 illustrating the 15
43 and sprockets 45, 46. Thus frame 35 preferably in
relationship of the parts as seen in FIG. 11.
FIG. 16 is a view similar to FIG. 14 illustrating the
relationship of the parts as seen in ‘FIG. 12.
FIG. 17 is a view similar to FIG. 14‘ illustrating the
20
relationship of the parts as seen in FIG. 13.
FIG. 18 is a diagrammatic view illustrating the piping
and relationship between the various hydraulic instru
mentalities utilized in the invention; and
FIG. 19 is a schematic wiring diagram illustrating the
electrical circuits utilized therein.
-
cludes a pair of attachment brackets 47, brackets 47 being
rigidly ?xed to frame 35 intermediate the height of the
frame and at the opposite upright guide members 37
thereof.
Chains 43 are ?xed to brackets 47 as at 48, as
best shown in FIGS. 2 and 3, and extend upwardly from
brackets 47 to pass around sprockets 4-5. Sprockets 4-5
are ?xed to a shaft 49 which extends transversely across
carriage 21 spanning ‘between front and rear beams 23,
25 and being preferably journalled in each of the we s of
Referring now to the drawings in which the various
parts are indicated by numerals, the stick placing means
of the present invention are essentially carried and
the beams 23 so that sprockets 45 are mountextl externally
of the webs of the front and rear beams 23, and are
housed between the upper and lower ?anges of the beams
23. Shaft 49 extends across the housing area heretofore
mounted upon a vertically reciprocable carriage 21, which
is of a substantially rectangular elongated formation in 30 mentioned de?ned by the beams 23, 218 and 31.
If desired, the chains may be continuous chains, but
cluding front and rear elongated beams 23, which are
preferably formed from I-beams or other structural mem
bers. These beams at their opposite terminals are inter
preferably in order to avoid sagging in the chains, chains
43 are adjustably connected as at St} to connecting rods
51, which are preferably adjustable in order to minimize
connected by outer beams 26. Outer beams 26 are rigidly
any such slack or sag in the chains and which rods extend
?xed to the beams 23, preferably as by welding, to pro
from a chain 43 at one side of the device, diagonally
vide a rectangular frame. Internally of one of the
longitudinally of carriage 21 to be connected as at 52
beams 26 carriage 21 is further bolstered by an additional
with a chain 43 at the opposite side of the carriage.
beam 28 which is slightly less in length than the beams
It will be seen that while the speci?c structure here is
26, and the ?anges of additional beam ‘28 are rigidly
?xed to the web of the beams 23 respectively, preferably 40 illustrated as comprising a pair of end chains at opposite
sides of the carriage, with the chains being interconnected
as by welding, in order to provide additional abutment
by a connecting rod, other chain interconnections be
and support for the devices carried by the carriage.
tween the respective elements may be employed without
Adjacent, but spaced a minor distance inwardly from
departing herefrom.
additional side beam 28, is a cross beam 31 which spans
As stated just hereinabove, chains 43 extend. upwardly
45
from front beam 23 to rear beam 23 and is rigidly ?xed to
the beams 23, cross beam 31 being preferably also formed
of a channel member similar to the beams 26, 28, and the
upper and lower ?anges of beam 31 may be notched out
so as to permit the seating of the web of beam 31 against
the respective webs of beams ‘23 and the edge engage
ment of the ?anges of beam 31 with the upper and lower
flanges of beams 23. Beam 31 is preferably ?xed in posi
from the brackets 47 and pass ‘around the sprockets 45.
They extend therefrom toward the opposite side of car
riage 21, being as stated preferably interconnected by a
rod 51 to the opposite chains‘ 43 which respectively pass
below sprockets 46, sprockets 46 being carried upon an
additional sprocket shaft ‘53 which is journalled in and
spans between the webs of beams 23 adjacent to sup
tion as by welding.
port frame 36. Chains 43 adjacent support frame 36 ex
preferably at regularly spaced intervals ‘and respectively
and stop means for engaging with the vertical guides
37 of the respective guide and support frames 35, 36.
Each of the beams 23 at their opposite ends is provided
with a stop plate 55 which is rigidly ?xed to the upper
?ange of the beam member. Carried by stop plate 55 is
tend upwardly from sprockets 46 and are connected as at
It will be observed that the area between beam 28
and cross beam 31 is an upwardly open area which is 55 54, as best shown at the right hand side of FIG. 2 and
is‘; also shown in FIG. 3, to the top member 41 of frame
housed on its sides and ends by beams 23, 28 and 31
so as to provide a housing area, the purpose of which
‘For the purpose of stabilizin<r and maintaining car
will be hereinafter discussed.
riage 21 in a standard vertical reciprocable movement,
Between cross beam 31 and the opposite side beam 26
a plurality of additional cross braces 31 are interposed, 60 carriage 21 at each of its corners is provided with shoe
spanning between front and rear beams 23. The cross
braces 33 are preferably formed of structural members
such as I-beams, and are preferably of a depth less than
65
the depth of the front and rear beams 23.
Carriage 21, including the structural members just
described and other instrumentalities supported and
mounted thereon, hereinafter to be described, is sup
a shoe 57 which engages ‘against an edge of the inner~
most ?ange of vertical guide member 37. The outer
beams ‘26 extend slightly beyond the extremities of front
and rear beams 23. At their ends the outer beams are pro
ported for vertical reciprocation by a pair of side frames
35, 36, respectively disposed at the opposite terminals of 70 vided with a stop plate 59 by which stop plate is carried
a similar shoe 61. Plates 59 are rigidly ?xed to the upper
carriage 21. Each of the support frames 35, 36 comprises
?anges of beams 26, and shoes 61 extend inwardly into
a vertically disposed structure which includes a pair of
engagement with the outer face of the innermost ?ange
vertical guide members 37, which may be formed of suita
of each of the upright guide members 37. This arrange
ble structural members such as H beams. The vertical
ment is shown by way of example in FIG. 9, Which illus
guide members 37 are rigidly supported in upright posi
5
3,081,888
trates one corner of carriage 21 and its relationship to a
guide member 37, a similar arrangement being employed
in connection with each of the corners of the carriage
6
front and read beams 23 of carriage 21. below the upper
extremities thereof. Preferably shaft 93 is journalled in
bearings 95, which are supported from structural mem
21.
It thus will ‘be seen that, from the arrangement as de
bers 97 which extend from and are secured to cross beam
scribed hereinabove, carriage 21 is so interconnected with
support fnames 35, 36 that an upward thrust imparted
to one end of carriage 21 will be immediately transmitted
passage thereby of sprocket shaft 43:.
31 and inner beam 23‘. Preferably each of ‘the beams 97
are cut out, as at 99 shown in FIG. 6, to provide for the
Connected to the opposite ends of shaft 93‘ respectively
that the carriage will be uniformly lifted in relatively level 1.0 forwardly and rearwardly :of bearings 95, and also re
spectively adjacent front and rear beams 23, are shift
condition. One of the vertical support frames, such as
to and balanced at the opposite end of carriage 21 so
frame 35, is provided with a transverse bracing and seat
structure including a horizontal transversely disposed
beam member 63 which spans between the vertical guide
members 37 of frame 35, and is rigidly ?xed thereto.
Preferably the bracing and seat structure includes di
agonally disposed structural members 65, which at their
upper ends are connected substantially at the middle of
arms 1&1. The arms 101 ‘are disposed substantially at 99
degrees relative to the arm 91 which is connected to pis
ton rod 89. Each of arms lill is connected as by a link
103 to a rod MP5. Rods 105 are slidably mounted to
extend through beam 31 and cross braces 33, and rods
1G5 extend substantially from end to end of carriage 21.
It will be seen that upon extension of rod 89‘ by the oper
ation of cylinder and piston assembly 87 arm 91 will be
depressed, rotating shaft 93 in a clockwise direction as
horizontal brace member 63 and respectively extend
diagonally downwardly and outwardly from such con 20
seen in FIG. 6, and effecting a shift of rods 1&5 toward
nection to be connected at rtheir lower ends to the respec
support frame 35, and upon retraction of piston rod 89
tive upright guide members 37, preferably adjacent sup
by the opposite operation of assembly 87 shaft 93‘ is
port level 39. Preferably horizontal brace 63 includes an
oppositely rotated to the position illustrated in FIG. 18
upper ?ange 66 which is horizontally disposed and pro
vides a seat for a single-action hydraulic cylinder and 25 in order to effect an opposite shift of rods away from sup
port frame 35.
piston assembly 67.
The hydraulic operation of assembly 87 is controlled
Actuatable by and included in cylinder and piston as—
through 1a valve ‘107, which is preferably supported within
sembly 67 is a piston rod 69 which is vertically extensible
the housing area, mentioned hereinabove, as by connec
from the cylinder of the assembly and is adapted for re—
tion to cross beam 3'1 intermediate the upper and lower
turn into the assembly. At its upper end piston rod 69
is connected with and ‘bears against outer beam 26 so that
a thrust extending piston rod 69 from assembly 67 will
act against the under surface of beam 26 and consequent—
ly upon carriage 21. This thrust at one end of the car
riage is transmitted through the chain and sprocket con
nections hereinabove described directly to the opposite
end of the carriage so as to equalize the effect of the lift
being exerted by the thrust at the one end.
?anges thereof.
Supply line 75 and return line 84} respectively com~
municate into valve 137. Valve 107 is an electrically
operated solenoid controlled four-way valve of substan
'tially conventional construction, the details and operation
of which are well known to those skilled in the art and
need not be set forth. Valve 107 communicates as by
a ?uid ?ow line 109 into the uppermost part of the
cylinder of assembly 87 to provide for ?ow of hydraulic
Fluid ?ow to and from hydraulic assembly 67 is de
livered through a line 71 which is communicated through 40 ?uid under pressure to and from the upper end of the
cylinder. A further ?uid flow line 111 communicates
a three-way electrically operated solenoid valve 7.3 and
into the lower end of the cylinder of assembly 87 to pro
line 74- to a main ?uid supply line 75 as at 76, ?uid line
75 being communicated with a pump 77. Preferably, as
best shown in FIG. 3, valve 73 is mounted upon hori
zonal surface 66 of brace 63.
Valve 73 provides the primary ?ow directional con
trol for the hydraulic instrumentalities utilized in the
present invention, and is of substantially conventional con
struction and operation familiar to those skilled in the art
vide for fluid flow under pressure to and from the lower
end of that cylinder.
In the conventional operation of valve 73‘, which is a
so-called self-centering valve, it is normally positioned
in neutral or hold position and is urged to return to that
position so as to interrupt communication to ‘and from
the cylinder of ‘assembly 67. The valve may be shifted to
so that the details of construction are not here necessary. 50 1a supply or lift position establishing communication be
tween ?ow lines 74 and 71 into assembly 67, with flow
A return ?uid line 78 leads from valve 75 for connection
through line 78 being blocked, or it may be shifted to a
as at 79 into a main return fluid flow line 80 leading to
discharge or lower position interrupting flow through line
a sump 81. Sump 31 is suitably connected as by a pipe
82 to pump 77.
"74 toward assembly 67 and establishing communication
between lines 71 and 78 into return line 80 so that car
Mounted upon carriage 21 adjacent side support frame
vriage 21 under the in?uence of gravity may descend with
the hydraulic fluid returning to the sump. Valve N7
3-5 is an upstanding rack 83 which includes legs respec—
tively seated upon and ?xed to carriage 21, one of the
legs preferably being seated upon and ?xed to outer beam
26 and additional beam 28 at ‘one side of rack 83-, and
the other of the legs of the rack being seated upon and
is a so-called no-detent valve and is of the conventional
type ‘adapted to be shifted in one direction by a solenoid
to establish communication between return line 80 and line
fixed to cross beam 31. Preferably rack 83‘ is inset so as
to lie intermediate the front and rear beams '23‘ of carriage
supply line 75 and line 111, or it may be shifted to estab
21, and so that the rack overlies the housing area hereto
fore described de?ned by beams 23, 28 and 31.
The legs of rack 83 are interconnected at their upper
ends by an upper member 84- to which is hingedly con
109, concurrently establishing communication between
lish communication between supply line 75 and line 109
and, concurrently, communication between return line 80
and line 111. As stated, these valve operations are con
ventional and the details of the construction and opera
tion of these valves is not otherwise believed to be
material.
It will be seen that, when valve 73 is shifted to the
nected, as at 85, a hydraulic cylinder and piston assembly
87, this assembly being a double action assembly and
depending from the hinged connection 35 ‘to position the
supply position just described, ?uid under pressure is fed
piston rod 89 of assembly 87 to extend downwardly into
the carriage 21 within the housing area mentioned herein 70 into the cylinder of assembly 67 and effects a vertical
lift ‘of carriage 21. When the valve is shifted to the hold
above.
position just described, which occurs as will hereinafter
At its lower end piston rod 89‘ is connected with an
be described when the carriage has reached its upper limit
arm 91 which is ?xed to a shaft 93‘ extending across the
above mentioned housing area and lying intermediate the -1 c of travel, ?ow to or from assembly 67 is blocked, thus
" holding the carriage in elevated position, and when this
3,081,888
8
position is released and the valve is moved to the dis
charge position the carriage descends by ‘gravity, the
weight of the carriage being effective to cause the dis
charge of ?uid from assembly 67 to return into the fluid
?ow lines to the sump.
Additionally it will be noted that when valve 107
is shifted into one ?ow position assembly ‘87 is activated
to extend piston rod 819 and effect shift of rods 1051 in one
stick 115. At its trailing end body 13? of each tongue is
?xed to a transversely extending rod 141 which extends
fore and aft across carriage 21 and is supported adjacent
its opposite ends and outwardly of end plates 117 from
brackets 143, brackets 143 being rigidly ?xed to and
shiftable with rods 1115 heretofore mentioned.
‘It will be observed that where leading section 135 joins
body 13? of each tongue 133 there is provided an abut
ment shoulder 145 which is adapted to engage against an
direction toward support frame 35, and, in the opposite
position of flow communication for assembly 37, piston 10 edge of a stick 115 and pursuant to movement of the
rod 89 is retracted into the assembly effecting shift of rods
165 in the ‘opposite direction away from support frame 35.
Mounted upon and carried by the carriage 21 are a
tongue 153 to e?ect shift of the stick. It will further be
seen that since tongues 133 on opposite parts of carriage
21 are interconnected by cross rods 141 conjoint move
plurality of stick-retaining magazines 113 which extend
ment of pairs of tongues is thereby provided, and upon
beams of carriage 21. The magazines ‘113 are adapted to
control and contain a plurality of vertically stacked
spacing sticks 115. Each magaizne 1131 includes a pair
of opposite upstanding end structures which comprise a
and piston assembly 87 rods 105 and tongues 133 thus
connected with rods 1115 are correspondingly shifted.
Thus as rods 1115 are shifted toward frame 35, or toward
the lefthand part of FIGS. 4 and 6, the tongues are ex
rear beams 23 and extending vertically above the front
fore supported upon leading thin portion 135 and cause
fore-and-aft between and are ?xed to the front and rear 15 the shift of rods 105 pursuant to the operation of cylinder
vertically disposed end plate 117, end plates 117 being 20 tended from beneath the magazines and abutments 145
engage the lowermost stick 115 which has been thereto
respectively rigidly ?xed to the inner edges of front and
and rear beams.
the same to shift with the tongues, the next superjacent
stick 115 being supported against downward movement by
Spaced somewhat inwardly from each of the end plates
is a pair of vertical guide rods 119, 120 which are spaced 25 the thicker body 139 of the respective tongues.
As the tongues and sticks are thus extended from
apart to receive and embrace the width of a plurality of
beneath the stick magazines, the leading edge of the stick
horizontally parallel sticks 115 arranged in a vertically
engages against the nose of a hook 147 of a gravity urged
disposed stack. At their uppermost ends each end plate
dog 149 pivotally supported as at 151 from a support 153
117 is connected with its related pair of guide rods 119,
120 as by a U-shaped bracket 121 by which the upper _, depending from cross braces 33. The engagement of the
stick with the nose of hook 147 causes the dog to move
end of the end plate and the guide rods are rigidly ?xed
upwardly, permitting passage of the stick thereunder, and
and maintained in position. At the upper ?ange of beam
after the passage of the stick thereunder the dog returns
23 a further bracket 123 is provided for each of the
by gravity to overlie the stick and with the interior of
magazine end sections, with bracket 123 extending into
overlying relationship with the upper portion of I-beam - hook 147 engaging against the trailing edge of the stick.
It will be seen that dogs 149 are supported slightly offset
23 and being rigidly ?xed thereto, and further embracing
from the aiinement of guide rods 11%, 120 to permit the
the end plate and related guide rods and being rigidly
passage of sticks 115 from beneath the guide rods and the
?xed thereto to maintain the guide rods and end plate in
engagement thereby with the dogs.
relationship to the I-beam. A similar lower bracket 125
it will further be seen that the opposite operation of
is provided which is ?xed to the lower ?ange and under
assembly 87 effects opposite shift of rods 105 away from
surface of I-beam 23 and embraces and is rigidly ?xed
frame 35, or toward the righthand part of FIGS. 4 and 6,
to the end plate and guide rods so as to further ?x the
correspondingly retracting tongues 133 with rods 1115 to
end sections of stick magazines 113 to the respective
return beneath magazines 113, thus moving the tongues
front and rear beams 25.
away from the support of the extended sticks 115 previ-i
It will be observed that the magazine end plates extend
ously supported upon the thinned end portions 135 of
vertically along the inner edges of the ?anges of the front
tongues 133, the extended sticks 115 being prevented from
and rear Lbeams 23 so that a channelway is de?ned out
opposite shifting movement with the tongues by the en
wardly from the end plates and between the upper and
gagement of the trailing edges of the sticks with dogs
lower ?anges of the T-beam along the webs of such 1
14?. Thus the retraction of tongues 133 causes deposit
50
beam. At their upper ends guide rods 119‘, 1251, which are
of sticks therefrom.
preferably tubular, may be provided with inserts 127
which each include an angled surface as at 125, surfaces
129‘ related with each pair of guide rods 119, 120‘ being
angled downwardly and inwardly toward the space be
tween the guide rods, and being adapted to assist in guid
ing sticks 115 as the same are inserted into the stick
magazines.
One of the guide rods of each pair, as the guide rods
12%, has rigidly ?xed to its lower end a slideway 131 of
substantially rectangular cross section, each of the slide—
ways 131 being centrally open to permit slideway move—
ment therethrough. Slidably mounted in each slideway
131 is a stick shifting tongue 133. At one end tongues
133 are provided with a thinned out leading section 135
In some instances it is found desirable to modify the
number of sticks which are to be deposited from the
magazines in a selective pattern, or under other circum
stances to eliminate the deposit of sticks from the maga
zines. For this purpose each magazine 113 is provided
at its respective front and rear ends with lockout means
which are adapted to support sticks 115 within a selected
magazine or magazines 113 above the level of recipro
cable movement of tongues 133 so as to prevent the
engagement of a lowermost stick of any of the selected
magazines from shifting movement in conjunction with
the tongue pursuant to shift movement of the rods 105’.
Connected to and depending below the respective
which extends beyond slideway 131 underlying in re 65 front and rear beams 23 and respectively in alinement
with magazines 113 are brackets 155. To brackets 155
tracted position the stack of sticks Within the magazine
are hinged, as at 157, stick engaging blocks 159. 'It, will
and projecting beyond the opposite guide rod 119. Pref
be seen, as best shown in FIGS. 5 and 8, that bracket-s
erably guide rods 119 are cut off along an angled surface,
155 are positioned outwardly from end plates 117 and
as at 137, a distance above the upper surface of tongue
section 135 in excess of the thickness of a single stick 70 that blocks 159 extend inwardly from brackets 155 to
underlie the end portions of magazine-contained sticks
115, but less than the combined thickness of a pair of
115, projecting inwardly to a point intermediate end
superposed sticks 115.
plates 117 and guide rods 119, 12%‘.
The main body 139 of each tongue 133 is of increased
To each block 159 the lower end of an upwardly ex-‘
thickness relative to leading tongue section 135 and is of
tending pull strap 151 is ?xed. Pull straps 161 are re
a thickness slightly less than the thickness of a single
9
3,081,888
10
spectively connected at their upper ends as by links 163
Extending
across
carriage
21 is a fore-and-aft disposed,
to the offset ends 165 of rods 167. Each magazine 113
vertically reciprocable feeler bar 137. Bar 137 is rigidly
is provided with a rod 167 and a pair of pull straps 161
?xed to a pair of upwardly extending hangers 189 which
connected therewith by links 163, and at their lower
are each provided with vertically extending slots 191.
ends connected with blocks 159, so that each magazine UK Extending inwardly from the respective front and rear
is provided with a pair of lockout blocks operatively con
members 23 are rigidly ?xed arms 193 which extend into
nected to the pull straps and turn rods at the opposite
and through slots 191 in hangers 189. inwardly of hang
ends of the magazine.
ers 139 an abutment member 195 is rigidly ?xed in angu
Each of rods 167 is provided with at least one handle
, lar relationship to each arm 193 so as to extend laterally
169, and the rods are journalled in suitable bushings 10 away from feeler bar 187 and hangers
189. Mounted
connected with opposite front and rear guide rods of the
respectively upon hangers 139 below slots 191 are a pair
magazines 113 such as guide rods 119. It will be seen
of switches 197, which are conventionally housed, and
that when any of handles 169 is lifted the turn rod 167 to
are preferably, as will hereinafter be pointed out, elec
which it is connected will be rotated, elevating its offset
trically connected in parallel, each of switches 197 being
ends 165 and causing upward movement of its connected 15 a double-throw switch.
pull straps 161, elevating the inner ends of its associated
Peeler bar switches 197 each include a pair of termi
blocks 159 about their pivots 157 so as to shift the blocks
nals
199, 2.06, which are maintained in normally open
from the position shown in FIG. 5 to the position shown
condition by a spring or other suitable means indicated
in FIG. 8 in which the blocks are raised upwardly be
by arrows 2131. Each of these switches also includes an
neath the ends of the sticks within the magazine and ele 20 additional pair of terminals 203, 2'14. The switches are
vate the same above the level of reciprocal movement of
provided with actuating arms 2G5 which project from the
the tongue associated therewith.
housings of the switches into the path of movement toward
It will be seen that the handles may be selectively ro
abutments 195, which upon upward movement of the
tated in this manner in order to elevate the blocks and
lock out the sticks from discharge from any one or more
of magazines 113, and that the handles may be reversely
moved to return the blocks to their normal horizontal
position and ‘return the lowermost of the sticks in the
magazine to position for subsequent engagement by
tongues 113 under rod operated shift of the tongues.
In order to coordinate the operations of the various
instrumentalities of the stick placing means of the pres
ent invention, a number of electrical controls ‘are pro
feeler bar engage switch arms 285 actuating the same to
shift the switches against the normal action of the switches
so as to break the contact between terminals 263, 2114,
and to make contact between terminals 199, 200. As
best shown in FIG. 19 terminals 261} are interconnected
by a tie line 2'97, and terminals 199 are electrically inter
connected by a tie line 233. Terminals 2-64 are intercon
nected by a tie line 209, and in addition terminals 199
and 2113 of each of switches 197 are interconnected as by
a shunt 210.
vided, the majority of which are operated by the mechan
has been heretofore described, upon the operation
ical actuation of switches during the cycle of operation 35 of As
assembly 87 the extension or retraction of piston rod
of the device. The device includes an upper limit switch
89 effects rotation or counter-rotation of shaft 93. Con
171, which is preferably a doubleathrow switch of con~
ventional operation and detail encased in a suitable hous
nected with shaft 93 are a pair of collars 211, 212 which
are ?xed to shaft 93 for rotation therewith. To collar
ing and mounted upon one of the upright side frames,
2111 is rigidly connected a radially projecting lug 214,
such as frame 36, adjacent its upper extremity.
40 and to collar 212 is rigidly connected a radially projecting
Switch 171 is provided with a pair of terminals 176,
lug 215. Each of lugs 214, 215 is positioned respectively
174, which are normally closed by a suitable switch bar,
to engage switches upon the rotation and subsequent
either by spring or other suitable conventional means
counter-rotation of shaft 93.
indicated by the arrow 175 (FIG. 19). It includes an
Thus a switch 217 is mounted preferably upon one of
additional pair of terminals 177, 178 toward which a 45 supports
97 in adjacency to collar 211 and its lug 214.
switch bar contained in switch 171 may be shifted by
Switch ‘217 is normally open, the arrow 219 indicating the
mechanical action as upon an arm 179 against the normal
conventional force applied thereto and the switch 217
ly closing force, interrupting any circuit through termi
includes terminals 221), 221. It will be seen that when
nals 173, 174i, and connecting terminals 177, 178. Arm
shaft 93 is rotated in the direction indicated by the arrow
179 projects from the housing of switch 171 into the path
“B”
(FIG. 19), lug 214i acts upon switch 217 to establish
of carriage 21 on its upward movement, preferably being
contact between terminals 220 and 221.
projected into the path of beam 26 adjacent to frame 36.
Lug 215, which radially projects from shaft 93 and is
Upon release of restraint upon arm 179, switch 171 is re
circumferentially spaced from the projection of lug 214
leased, and under its normal action returns to its normal
position with connection made across terminals 173, 174. 55 from shaft 93, is eli’ective to cause operation of a switch
223. Switch 7.23 is a double'throw switch which includes
Additionally, and for purposes to be hereinafter pointed
a pair of normally closed terminals ‘225, 226 normally
out, a shunt 180 interconnects terminals 174, 178.
maintained in contact by the force indicated by arrow 227.
Supported intermediate the length of carriage 21, as by
Switch 223 further includes an additional pair of termi
mounting upon one of cross braces 33, is an initial acti
vating switch 181. Switch 181 is preferably a single 60 nals 229, 230, which are brought into electrical connec
tion by the rotation of shaft 93 in the direction of the
throw switch which includes a pair of terminals 183, 134».
arrow
“R” (FIG. 19) so as to break the contact between
Connected with the terminal bar of switch 181 and pro
terminals 225, 226, and to make the contact between ter
jecting outwardly through the housing for switch 181 is
minals 229, 231}.
a tilt lever 185, which is pivotally supported outwardly
Valves 73 and 1&7, as has been previously indicated,
from the terminal bar of switch 181 and is gravity biased
are solenoid operated valves of substantially conventional
to normally extend downwardly and rearwardly from sub
construction. Thus valve 73 includes a solenoid 232 hav
stantially the side to side midline of carriage 21 toward
ing opposite terminals 233, 234, and which is connected
the rearmost of beams 23, and to extend thus diagonally
with valve 73 for shifting the valve to the‘previously de
below the level of the lowermost sticks 115 in magazines
113. The gravity bias on tilt lever 185 is indicated by 70 scribed carriage raising position, establishing communica
tion between ?ow lines 71, '74, 75 into assembly 67. The
the arrow 186. Thus switch 181 under the gravity biased
valve assembly 73 further includes an additional solenoid
action of tilt lever 185 is normally open, and upon en
236 with terminals 237, 238, which is effective to shift
gagernent of tilt lever 185 elevating the lever the switch
valve 73 to the‘ carriage lowering position in which ?ow
is moved to closed position, the terminal bar completing
is shut off through line '74 and communication is estab
the circuit across the terminals 183, 184.
76 lished between lines 71, 73 into the return line 811. When
1l
the circuits through solenoids 232, 236 are deenergized
valve 73 is of the construction to return to center in con
ventional operation so as to interrupt how to and from
the cylinder and piston assembly 67.
Valve 167 is provided with an extend solenoid 24%)
having terminals 241, 242, which is adapted when ener
gized to operate valve 167 and to establish communica
12
'171 with the initial source of power, and which there
after maintain proper delivery of power for the opera
tion of lumber stacker 299.
Lumber stacker 299 is illustrated as including a series
of forks 365 which are adapted to pick up a flight of
lumber ‘3G7 and to stack the same upon a lumber stack
399. In order to maintain the alinement of the rearward
edges of successive ?ights of lumber 307 the carriage
‘21 is provided with a plurality of depending stop‘ mem
assembly 87 for extending rod 89 therefrom, concurrently
establishing communication between lines ‘1111 and 85} to 10 bers 311 which are ?xed to and depend below rear beam
23 of carriage 21. it [Will be observed that carriage 21
return from the lower end of assembly 87, and thus to
tion between ?ow lines 75 and 1% into the cylinder of
rotate shaft 93 so as to extend rods 1% concurrently ex
straddles the lumber stack W9 and that the successive
?ights of lumber 3G7 introduced to the stack by the
stacker forks 385 are inserted beneath the carriage of
a retract solenoid 244 having terminals 245, 2%, solenoid
2441 being adapted when energized to reversely shift valve 15 the stick placing means. It will further be observed, as
more particularly described in the patents mentioned
107 so as to establish communication between lines 75
hereinabove, that the stacker forks carry a ?ight of lum
and 111 and how lines 1639 and 8b in order to cause
her 367 into the area of the ‘lumber stack 309 and ele
retraction of the piston rod 89 into assembly 87 and to
vated above the lumber stack, that the stacker forks are
counter-rotate shaft 93 so as to effect retraction of rods
1%‘ retracting tongues 133 as heretofore described. Valve 20 lowered so as to carry the ?ight of lumber downwardly
into closely overlying relationship with the lumber stack,
167 being a no-detent valve, upon the deenergization of
and that thereafter the stacker forks are withdrawn or
either of solenoids 2.40, 244 no immediate shift of the
retracted away from‘ the lumber stack, and that this op
valve is thereby occasioned.
eration is subsequently repeated for the placing of fur
To initiate the operation of the device a substantially
conventional starter mechanism is provided, which in 25 ther flights of lumber 3G7 upon the stack.
In the operation of the device, the stanter switch 248
cludes a start-stop switch 248. One terminal 25,9 of
is operated to energize the starter .coil 255 and close gang
switch 248 is connected, as at 256), to an incoming lead
switches 261, thus communicating the source of power
251 from a suitable source of power, preferably being
represented by 'lines 251, 252, 267 with lines 263, 265,
supplied as three-phase power. An additional incoming
line 252 from the power source is connected, as at 253, 30 269 into pump motor 77, thus energizing the pump motor
and initiating the operation. When carriage 21 is or has
to a lead 254 to a starter coil 255, starter coil 255 being
been moved to the upper position the actuation of switch
connected to an opposite terminal 256 of starter switch
arm 179 by beam 26 shifts switch 171 to the position
248 as by a lead 2E7. When starter contact 259 is closed
illustrated in FIG. 19, connecting terminals 177, 178,
with terminal 249, starter coil 255 is energized acting in
conventional fashion to close the gang switches 261, thus 35 and stacker 239‘ is energized through leads 30-1, 352 to
stacker starter 303. it will be observed that the stacker
eflecting electrical communication with the source of
is not operable initially until the stick placing carriage is
power between power line 251 and a line ‘263, power line
in the up raised position.
252 and a line 265, and between a power line 267 and a
With the carriage in (this position upper limit switch
line 269. Lines 263, 265, are are directly connected
171 has been actuated to interconnect terminals 177,
with pump motor 77 so that upon the energization of
173 against the normal action of the switch, and tilt
the circuit as described the pump motor is put into oper
lever 135 hangs diagonally downwardly from carriage 21
ation.
extending diagonally rearwardly toward rear beams 23.
Line 263 is connected as by a lead 271 to terminal 173
Otherwise, the switching and solenoids of the systeml are
of switch 171, and is connected by a lead 273 to feeler
bar switch terminals 263. Line 269 is connected as by a 45 in the further condition illustrated in FIG. 19. When
stacker 299‘ introduces a ?ight of lumber 307 beneath
lead 275 to terminal 24-1 of extend solenoid 24%. Lead
‘carriage 21, the rearward part of the ?ight of lumber
269 is further connected as by a lead 277 to terminal 246
relative to the stick placing means engages tilt lever 185,
of retract solenoid 244i and is connected as by a lead 279
elevating same away from its diagonally disposed posi
to raise solenoid terminal 231%.
Terminal 177 of upper limit switch 171 is connected 50 tion and closing switch 181 across terminals 183, 184,
thus creating a circuit from terminal ‘183 through lead
as by a lead 231 to terminal 184 of tilt lever switch 181.
283 into extend solenoid 240, from extend solenoid 240
Terminal 183 of tilt lever switch 181 is connected as by
through lead 275 into power line 269, through the gang
a lead 233 to terminal 24-2 of extend solenoid 240‘.
switches 161 into power line 263 and by lead 271 into
‘Terminal 229 of extend actuated switch 217 is con
nected as by a lead 235 to terminal 237 of lowering sole 55 upper limit switch 171 and across terminals 177, ‘178 into
lead 281 to return into the terminal 184, energizing ex
noid 23d. Terminal 22d of switch 217 is connected as by
tend solenoid 240* to shift valve 107 to the position in
a lead ‘287 to one of feeler bar switch terminals 2%.
which rod 89 is extended, causing rotation of shaft 93 in
Terminal 238 of lowering solenoid 23% is connected as
the direction of arrow “E,” extending rods M5 to pull
by a lead 289 into lead 277 connected into line 26‘). One
tending tongues 133‘. Valve 197 is further provided with
of feeler bar switch terminals 2% is connected as by a 60 with them and extend tongues 133. As tongues 133‘ are
thus extended shoulders 145 engage the trailing edges
lead 231 to terminal 226 of retract actuated switch 223‘.
of the lowermost sticks v115 in each of the magazines
Terminal 225 of switch 223 is connected as by a lead 293
1-13, moving the same outwardly beneath the dogs 149,
to terminal 245 of retract solenoid 244. Terminal 2-29
with the remainder of sticks 115 being supported upon
of retract actuated switch 223 is connected as by a lead
295 to terminal 173 of upper limit switch 171. Terminal 65 the thickened main body 139 of tongues 133.
When the operation of assembly 87 through the
239 of switch 223 is connected as by a lead 297 to termi
energization of extend solenoid 240 is completed lug 214
nal 233 of raise solenoid 232.
Preferably the device is coordinated for use in con
has been shifted by the rotation of shaft 93 to effect
junction with a lumber stacker 299, which may be of
closure of switch 217 energizing the lowering solenoid
the type described
the patents previously mentioned. 70 236 by a ycircuit from terminal 22% through lead 285 into
For this purpose leads 391, 362 are connected to upper
terminal 237 of ‘solenoid 236, and from solenoid 236
limit switch terminals 177, 178, and extend therefrom
through lead 283 into lead 277, thence into line 269 to
into a stacker starter 3&3 which comprises a series of
return from the gang switches through line 263, lead 273
gang switches magnetically closed by energization, as
into and across switches 197, and outwardly from
when the leads 301, 302 are connected through the switch
13
3,081,888
Switches 197 through lead 287 to terminal 221 of switch
217.
Thus valve 73 is shifted to establish lowering com
munication of assembly 67 with the hydraulic system
and under the weight of the device the carriage moves
downwardly by ‘gravity. As the device approaches in its
downward movement the upper extremity of lumber
stack 3G9, feeler bar 187 comics into engagement with
the lumber stack. Bar 187 is moved upwardly relative
to arms 193 and abutments ‘195 so as to shift switches
1%7, at the full extent of relative upward travel of the
feeler bar. When the carriage has reached substantial
ly the level where the underlying tongues 2133 are but a
minimum distance above the upper level of the lumber
stack, the engagement of switches 197 against abutments
.195 effects shift of the switches 197 breaking the circuits
across terminals 203, 204i and thus interrupting the cir
unit to the lowering solenoid so as 'to return valve '73 to
14
layers of lumber in said lumber stack, comprising a sub
stantially horizontal carriage overlying the lumber stack,
upright support means adjacent the opposite sides of said
carriage, said carriage slidably engaging said support
means for vertical reciprocation from and to a raised
position spaced substantially above said lumber stack to
and from a lowered position in close superjacency to the
uppermost layer of lumber in said stack, hydraulic lift
means mounted on one support means at one end of said
carriage and engaging said carriage for exerting lift on
said one end of said carriage under hydraulic actuation
of said lift means, interconnected chain and sprocket
means carried by said carriage and attached respectively
to said support means transmitting lift exerted on said
one end to the other end of said carriage for uniform
vertical movement of said carriage, a plurality of stick
retaining open bottom magazine means spanning fore
and aft across and carried by said carriage means in
its normally centered neutral position in which the car
spaced relation along said carriage, a supply of horizon
riage is maintained at its then established level.
20 tally ‘disposed spacing sticks vertically stacked in said
This shift of switches i197 concurrently establishes a
magazine means for gravity discharge from the bottoms
circuit across terminals 199, 200, which passes from
of said magazine means, horizontally shiftable tongue
terminal 204) through lead 291 across terminals 225', 226
means connected to said magazine means; and underlying
of retract ‘switch 223, thence through lead 293 to termi—
said sticks in a retracted condition limiting stick dis
nal 245 of solenoid 244, from{ terminal 246 of solenoid
charge from said magazine means, said tongue means
244 through lead 277 into line 2%‘, thence ‘from line 263
‘being shiftable from and to said retracted condition to
through lead 273 into terminal 2&3 of switch ‘197, thence
and from an extended condition projecting from said
across shunt 216* to terminal 199. Thus retract solenoid
magazine means and including abutment shoulders en
’ 44 is energized to effect operation of valve 187 and to
gaging and shifting the lowermost of said sticks during
shift the same to the position of retracting piston rod 89 30
shift of said tongue means toward extended condition
to effect counter~rotation of ‘shaft 23 in the direction in
to effect shift of said lowermost sticks away from said
dicated by the arrow “R,” moving the lug 215 to act upon
magazine means, elongated rods supported by said car
switch 223 and interrupt the circuit across terminals 225‘,
riage connected to said tongue means for concurrently
226 while making contact across the terminals 229, 2%.
shifting
said tongues to and from said conditions, said
This operation is effective upon the completion of the 35 rods being linked to a shaft journalled fore and aft of
full retraction counter-rotation of shaft 93, and interrupts
said carriage, hydraulic actuating means connected to
the circuit to retract solenoid 244 while establishing a
said shaft for effecting shaft rotation and rod shift to
circuit to raise solenoid 232. This circuit leads from
cause shift of said tongues to extended condition and
terminal 229 through lead 295 into terminal 173 of limit
shaft counter rotation and opposite rod shift to cause
switch 171 which has been closed by the force action as
shift of said tongues to said retracted condition, a tilt
indicated by arrow 175 to communicate terminal 173 with
terminal 174. The circuit continues across shunt 180 into
terminal 178, thence through lead 271 into line 263 and
from line 265? through lead 275 into lead 279, thence
to terminal 234 of raise solenoid 232, from terminal 233
of solenoid 232 through lead 297 into terminal 234} of
switch 233. Thus the valve '73 is shifted to actuate cylin
der and piston assembly 67 so as to elevate the carriage,
permitting the gravity relative lowering of feeler bar 187
returning switches 197 to their normal condition as shown
in FIG. 19, interrupting the circuit to retract solenoid
244, and permitting the gravity biased operation of tilt
lever 185 opening switch 181, with the connection be
tween terminals 229, 239 of switch 233 being maintained
by the physical position of lug 215 against the switch.
When the carriage reaches its upper limit, switch arm
179 engages beam 26 and shifts switch 171 to the position
lever pivoted to and depending diagonally below said
carriage disposed in the path of and for contact by a
layer of lumber being delivered toward said stack, said
lever being connected to actuate said hydraulic actuating
45 means for shaft rotation and rod and tongue shift to said
extended condition when contacted by a layer of lumber
under delivery, said shaft rotation effecting release of said
hydraulic lift means for gravity descent of said carriage,
a vertically shiftable feeler bar depending below said car
riage, means operatively connecting said feeler bar to
said hydraulic lift means and to said hydraulic actuating
means, said feeler bar being operated when said carriage
has descended into proximate superjacency with said
lumber stack to interrupt release of said lift means and
55 stop carriage descent and to oppositely actuate said h -
draulic actuating means for shaft counter rotation and
rod and tongue shift to said retracted condition, dog
shown in FIG. 19, thus interrupting the circuit to raise
means engaging said extended lowermost sticks and pre
solenoid 232, and positioning the device and its controls
venting stick retraction with said tongue shift whereby
for a subsequent cycle of operation.
60 said tongue means retract from said extended sticks to
It will be observed that sticks 115 to be placed by the
place said extended sticks upon said stack, said shaft coun
device are extended from beneath their respective maga—
ter rotation after retraction of said tongues effecting lift
zines 113 at the uppermost position of the carriage and
actuation of said hydraulic lift means to effect lift of said
are carried downwardly in such extended position, and
carriage to said raised position.
that the retraction of tongues 133 from supporting posi
2. In combination with means for delivering and de
tion beneath sticks 115 is accomplished only when the
positing successive layers of lumber on a stack of lum
carriage has reached and come to rest at a position sub
ber, means for placinr7 spacing sticks upon said successive
stantially in adjacency to the upper surface of the lumber
layers of lumber in said lumber stack, comprising a sub
stack, thus providing for placing of the sticks in accu
stantially horizontal carriage overlying the lumber stack,
rate alinement and positioning upon the upper surface 70 means supporting said ‘carriage for vertical reciprocation
of the lumber stack.
from and to a raised position spaced substantially above
I claim:
said lumber stack to and from a lowered position in close
1. In combination with means for delivering and de
superjacency to the uppermost layer of lumber in said
positing successive layers of lumber on a stack of lumber,
stack, hydraulic lift means engaging said carriage for
means for placing spacing sticks upon said successive 75 exerting lift on said carriage under hydraulic actuation
3,081,888
15
16
extended condition to effect shift of said lowermost sticks
away from said magazine means, shift means connected
to said tongue means for concurrently shifting said
of said lift means, means carried by said carriage trans—
mi-tting lift exerted on said carriage for uniform vertical
movement of said carriage, a plurality of stick retaining
open bottom magazine means spanning fore and aft
across and carried by said carriage means in spaced rela
means connected to said shift means to cause shift of
tion along ‘said carriage, a supply of horizontally disposed
spacing sticks vertically stacked in said magazine means
for gravity discharge from the bottoms of said magazine
oted to and depending ‘diagonally below said carriage dis
tongues to and from said conditions, hydraulic actuating
said tongues to extended condition and opposite shift of
said tongues to said retracted condition, a tilt lever piv
posed in the path of and for contact by a layer of lumber
means, horizontally shif-table tongue means connected to
said magazine means and underlying said sticks in a re 10 being delivered toward said stack, said lever being con
nected to actuate said hydraulic actuating means for
tracted condition limiting stick discharge from said mag
tongue shift to said extended condition when contacted
azine means, said tongue means being shiftable from and
by a layer of lumber under delivery, and release 'of said
to said retracted condition to and from an extended con
hydraulic lift means upon completion of said tongue shift
dition projecting from said magazine means and includ
ing abutment shoulders engaging and shifting the lower 15 to extended condition for gravity descent of said carriage,
a vertically shiftable feeler bar depending below said
most of said sticks during shift of said tongue means to
carriage, means operatively connecting said feeler bar to
ward extended condition to effect shift of said lowermost
said hydraulic lift means and to said hydraulic actuating
means, said feeler bar being operated when said carriage
means for concurrently shifting said tongues to and from 20 has descended into proximate superjacency with said
lumber stack to interrupt release of said lift means and
said conditions, said rods being linked to a shaft jour
stop carriage descent and to oppositely actuate said hy
nalled fore and aft of said carriage, hydraulic actuating
sticks away from said magazine means, elongated rods
supported by said carriage connected to said tongue
means connected to said shaft for effecting shaft rota
tion and rod shift to cause shift of said tongues to ex
draulic actuating means for tongue shift to said retracted
rod shift to cause shift of said tongues to said retracted
shift whereby said tongue means retract from said ex
condition, ‘dog means engaging said extended lowermost
tended condition and shaft counter rotation and opposite 25 sticks and preventing stick retraction with said tongue
tended sticks to place said extended sticks upon said
condition, a tilt lever pivoted to and depending diagonally
stack, completion of retraction of said tongues effecting
below said carriage disposed in the path of and for con
lift actuation of said hydraulic lift means to effect lift to
tact by a layer of lumber being delivered toward said
said carriage to said raised position.
stack, said lcver being connected to actuate said hydraulic
4. In combination with means for delivering and de
actuating means for shaft rotation and rod and tongue
positing successive layers of lumber on a stack of lumber,
shift to said extended condition when contacted by a layer
means for placing spacing sticks upon said successive
of lumber under delivery, said shaft rotation effecting re
layers of lumber in said lumber stack, comprising a sub
lease of said hydraulic lift means for gravity descent of
said carriage, a vertically shiftable feeler bar depending 35 stantially horizontal carriage overlying the lumber stack,
means supporting said carriage for vertical reciprocation
elow said carriage, means operat'vely connecting said
from and to a raised position spaced substantially above
feeler bar to said hydraulic lift means and to said hy
said lumber stack to and from a lowered position in close
draulic actuating means, said feeler bar being operated
superjacency to the uppermost layer of lumber in said
when said carriage has descended into proximate super
jacency with said lumber stack to interrupt release of 40 stack, hydraulic lift means engaging said carriage for ex
erting lift on said carriage under hydraulic actuation of
said lift means and stop carriage descent and to opposite
said lift means, a plurality of stick retaining open bot
ly actuate said hydraulic actuating means for shaft count
er rotation and rod and tongue shift to said retracted
tom magazine means spanning fore and aft across and
carried by said carriage means in spaced relation along
condition, dog means engaging said extended lowermost
sticks and preventing stick retraction with said tongue 45 said carriage, a supply of horizontally disposed spacing
sticks vertically stacked in said magazine means for grav~
shift whereby said tongue means retract from said ex
ity discharge from the bottoms of said magazine means,
tended sticks to place said extended sticks upon said
horizontally shiftable tongue means connected to said
stack, said shaft counter rotation after retraction of said
magazine means and underlying said sticks in a retracted
tongues effecting lift actuation of said hydraulic lift means
condition limiting stick discharge from said magazine
to effect lift of said carriage to said raised position.
means, said tongue means being shiftable from and to
3. In combination with means for delivering and de~
said retracted condition to and from an extended condi
positing successive layers of lumber on a stack of lumber,
tion projecting from said magazine means and including
means for placing spacing sticks upon said successive
layers of lumber in said lumber stack, comprising a sub 55 abutment shoulders engaging and shifting the lowermost
of said sticks during extending shift of said tongue means
stantially horizontal carriage overlying the lumber stack,
toward extended condition to effect shift of said lower
means supporting said carriage for vertical reciprocation
most sticks away from said magazine means, shift means
from and to a raised position spaced substantially above
connected to said tongue means for concurrently shifting
said lumber stack to and from a lowered position in close
superjacency to the uppermost layer of lumber in said 60 said tongues to and from said conditions, actuating means
connected to said shift means for effecting alternately
stack, hydraulic lift means engaging said carriage for
shift of said tongues to extended condition and opposite
exerting lift on said carriage under hydraulic actuation
shift of said tongues to said retracted condition, lever
of said lift means, a plurality of stick retaining open bot
means disposed in the path of and for contact by a layer
tom magazine means spanning fore and aft across and
carried by said carriage means in spaced relation along 65 of lumber being delivered toward said stack, said lever
said carriage, a supply of horizontally disposed spacing
sticks vertically stacked in said magazine means for grav
ity discharge from the bottoms of said magazine means,
horizontally shiftable tongue means connected to said
magazine means and underlying said sticks in a retracted
condition limiting stick discharge from said magazine
means, said tongue means being shiftable from and to
said retracted condition to and from an extended condi
tion projecting from said magazine means and including
abutment shoulders engaging and shifting the lowermost
of said sticks during shift of said tongue means toward
means being connected to actuate said actuating means
for tongue shift to said extended condition when con
tacted by a layer of lumber under delivery and release
of said hydraulic lift means upon completion of said
tongue shift to extended condition for gravity descent
of said carriage, a vertically shiftable feelcr bar depend
ing below said carriage, means operatively connecting
said feeler bar to said hydraulic lift means and to said
ctuating means, said feeler bar being operated when
said carriage has descended into proximate superjacency
with said lumber stack to interrupt release of said lift
17
3,081,888
18
means and stop carriage descent and to oppositely actu
ate said actuating means for tongue shift to said retracted
condition, .dog means engaging said extended lowermost
sticks and preventing stick retraction with'said tongue
shift whereby said tongue means retract from said ex
tended sticks to place said extended sticks upon said
stack, completion of retraction of said tongues effecting
means connected to said magazine means and underlying
said sticks in a retracted condition limiting stick dis~
charge from said magazine means, said tongue means
being shiftable from and to said retnacted condition to
and from ‘an extended condition projecting from said
magazine means and including abutment shoulders en
gaging and shifting the lowermost of said sticks during
lift actuation of said hydraulic. lift means to effect lift of
extending shift of said tongue means toward said extended '
said carriage to said raised position.
condition to effect shift of said lowermost sticks away
5. In combination with means for .delivering and de 10 from said magazine means, means for concurrently al
positing successive layers of lumber on a stack of lum
ternately shifting said tongues to and from said condi
ber, means for placing spacing sticks upon said succes
tions, means connected to actuate said means for shifting
sive layers of lumber in said lumber stack, comprising a
said tongues to effect tongue shift to said extended condi
substantially horizontal carriage overlying the lumber
tion responsive to delivery of a layer of lumber and
stack, means supporting said carriage for vertical recip 15 release of said lift means upon completion of said tongue
rocation from and to a raised position spaced substan
shift to extended condition for gravity descent of said
tially above said lumber stack to and from a lowered
carriage, control means on said carriage, means operative
position in close superjacency to the uppermost layer of
ly
connecting said control means to said lift means and
lumber in said stack, hydraulic lift means engaging said
carriage for exerting lift on said carriage under hydraulic 20 to said means for shifting said tongues, said control
means being ‘operated when said carriage has descended
actuation of said lift means, a plurality of stick retaining
into
proximate superjacency with said lumber stack to
open bottom magazine means spanning fore and aft
interrupt release of said lift means and stop carriage
across and carried by said carriage means in spaced re
descent and to oppositely actuate said means for shifting
lation along said carriage, a supply of horizontally dis
posed spacing sticks vertically stacked in said magazine 25 said tongues to effect tongue shift to said retracted condi
tion and place said extended sticks upon said stack, com
means for gravity discharge from the bottoms of said
pletion of retraction of said tongues effecting lift actua
magazine means, horizontally shiftable tongue means
tion of said lift means to effect lift of said carriage to said
connected to said magazine means and underlying said
raised position.
sticks in a retracted condition limiting stick discharge
7. In combination with means for delivering and de
from said magazine means, said tongue means being shift 30
positing successive layers of lumber on a stack of lumber,
able from and to said retracted condition to and from an
means for placing spacing sticks upon said successive
extended condition projecting from said magazine means
layers of lumber in said lumber stack, comprising a
and including abutment shoulders engaging and shifting
substantially horizontal carriage overlying the lumber
the lowermost of said sticks during extending shift of
said tongue means toward said extended condition to 35 stack, means supporting said carriage for vertical recip
rocation from and to a raised position spaced substantially
effect shift of said lowermost sticks away from said maga
above said lumber stack to and from‘ a lowered position
zine means, means for concurrently alternately shifting
in close superj-acency to the uppermost layer of lumber in
said tongues to and from said conditions, lever means
said stack, lift means engaging said carriage for effecting
disposed in the path of and for contact by a layer of lum
ber being delivered toward said stack, said lever means 40 vertical reciprocation of said carriage, a plurality of stick
retaining open bottom magazine means spanning fore and
being connected to actuate said means for shifting said
aft across and carried by said carriage means in spaced
tongues to effect tongue shift to said extended condition
relation along said carriage, a supply of horizontally
when contacted by a layer of lumber under delivery and
disposed spacing sticks vertically stacked in said maga
release of said hydraulic lift means upon completion of
zine means for gravity discharge from the bottoms of
said tongue shift to extended condition for gravity de
scent of said carriage, a vertically shift-able feeler bar 45 said magazine means, horizontally shiftable tongue means
connected ‘to said magazine means and underlying said
depending below said carriage, means operatively con
sticks in a retracted condition limiting stick discharge
necting said feeler bar to said hydraulic lift means and
from said magazine means, said tongue means being shift
to said means for shifting said tongues, said feeler bar
being operated when said carriage has descended into
proximate superjacency with said lumber stack to inter
rupt release of said lift means and stop carriage descent
and to oppositely actuate said means for shifting said
tongues to effect tongue shift to said retracted condition
and place said extended sticks upon said stack, comple
tion of retraction of said tongues effecting lift actuation
of said hydraulic lift means to effect lift of said carriage
to said raised position.
6. In combination with means for delivering and de
positing successive layers of lumber on a stack of lumber,
means for placing spacing sticks upon said successive
layers of lumber in said lumber stack, comprising a sub
able from and to said retracted condition to and from an
extended condition projecting from said magazine means,
means for concurrently alternately shifting said tongues
to and from said conditions, means connected to actuate
said means for shifting said tongues to effect tongue shift
to said extended condition responsive to delivery of a layer
of lumber and release of said lift means upon completion
of said tongue shift to extended condition for gravity des
cent of said carriage, control means on said carriage,
means operatively connecting said control means to said
lift means and to said means for shifting said tongues,
60 said control means being operated when said carriage has
descended into proximate superjacency with said lumber
stantially horizontal carriage overlying the lumber stack,
stack to interrupt release of said lift means and stop
means supporting said carriage for vertical reciprocation
carriage descent and to ‘oppositely actuate said means for
from and to a raised position spaced substantially above
shifting said tongues to effect tongue shift to said retracted
65
said lumber stack to and from a lowered position in close
condition and place said extended sticks upon said stack,
superjacency to the uppermost layer of lumber in said
completion of retraction of said tongues effecting lift
stack, lift means engaging said carriage for effecting verti
actuation of said lift means to e?ect lift of said carriage
cal reciprocation of said carriage, a plurality ‘of stick
to said raised position.
retaining open bottom magazine means spanning fore
8. In combination with a lumber stacker for delivering
and aft across and carried by said carriage means in 70 and depositing successive ‘layers of lumber on a lumber
spaced relation along said carriage, a supply of horizon
tally disposed spacing sticks vertically stacked in said
magazine means for gravity discharge from the bottoms
of said magazine means, horizontally shiftable tongue 75
stack, a stick placer device adapted to accurately place
spacing sticks upon the uppermost layer of lumber in
a lumber stack, said placer including a vertically recip
rocable carriage, means for causing and controlling up
3,081,888
19
29
a stick placer device adapted to accurately place spacing
single sticks directly onto said stack when said carriage
tially concurrently with interruption of carriage down
and down movement of said carriage, a plurality of
movement in proximity to the lumber stack,
stick-handling magazine means mounted on said carriage,
11. In a lumber stacking and spacing means, which
a supply of spacing sticks stacked in said magazine means,
include means for successively positioning layers of lum
tongue means slidably connected respectively to said
magazine means adjacent the opposite ends thereof en C1 ber on a lumber stack, means for placing spacing sticks
upon the successive layers of lumber, comprising a ver
gaging the lowermost stick adjacent its opposite ends for
tically reciprocable carriage overlying said stack, a plu
extending said lowermost stick away from the respective
rality of supplies of spacing sticks carried by said car
said magazine means transversely of the length of said
riage at spaced intervals along said carriage, means ‘for
lowermost stick while said carriage is up away from said
reciprocating said carriage from and to an elevated posi
stack for access of said stacker to said stack and for
tion spaced above said stack to and from a lowered de
placing the respective extended sticks upon the lumber
posit position closely adjacent said stack, extending
stack when said carriage is lowered into proximity with
means activated by carriage movement to said elevated
said stack, and means carried by said carriage effecting
position for separating a single spacing stick from each
said placing substantially concurrently with interruption
of carriage down movement in proximity to the lumber 15 said supply, and supporting said single sticks at the lower
part of said carriage, means activated upon substantial
stack.
completion of carriage movement to said lowered de
9. In combination with means for delivering and de
posit position for effecting deposit of said separated
positing successive layers of lumber on a lumber stack,
sticks upon the uppermost layer of lumber in a lumber 20 lower part is closely adjacent said stack, and means syn~
chronizing said carriage movements with successive posi
stack, said placer including a vertically reciprocable car
tioning of layers of lumber on said stack.
riage, means for causing and controlling up and down
12. In lumber stacking and spacing means, which in
movement of said carriage, a plurality of stick-handling
clude means for successively positioning layers of lum
magazine means mounted on said carriage, a supply of
spacing sticks stacked in said magazine means, means con 25 ber on a lumber stack, means for placing spacing sticks
upon the successive layers of lumber, comprising a verti
nected respectively to said magazine means engaging the
cally reciprocable carriage overlying said stack, a plu
lowermost stick for extending said lowermost stick away
rality of supplies of spacing sticks carried by said car
from the respective said magazine means while said car
riage at spaced intervals along said carriage, means for
riage is up away from said stack for access of said deliver
reciprocating said carriage from and to an elevated posi
ing means to said stack and for placing the respective ex
tion spaced above said stack to and from a ‘lowered de
tended sticks upon the lumber stack when said carriage
posit position closely adjacent said stack, extending
is lowered into proximity with said stack, and means
means activated by carriage movement to said elevated
carried by said carriage effecting said placing substan
position for separating a single spacing stick from each
35 said supply, and supporting said single sticks at the lower
movement in proximity to the lumber stack.
part of said carriage, means activated upon substantial
10. In combination with means for delivering and de
completion of carriage movement to said lowered de
positing successive layers of lumber on a lumber stack,
tially concurrently with interruption of carriage down
a stick placer device adapted to accurately place spacing
sticks upon the uppermost layer of lumber in a lumber
stack, said placer including a vertically reciprocable car
riage, means for causing and controlling up and down
movement of said carriage, a plurality of stick-handling
magazine means mounted on said carriage, a supply of
posit position for effecting deposit of said separated single
sticks directly onto said stack when said carriage lower
part is closely adjacent said stack.
13. Stick placing means in accordance with claim 12,
which includes‘ manually operable means selectively re
taining said stick supplies out ‘of engagement by said
extending means.
spacing sticks stacked in said magazine means, means
connected respectively to said magazine means engaging 45
References Cited in the ?le of this patent
the lowermost stick inwardly from the opposite ends
UNITED STATES PATENTS
of said stick for extending said lowermost stick away
from the respective said magazine means while said car
674,262
‘Duncan ______________ __ May 14,
riage is up away from said stack for access of said deliv
ering means to said stack and for placing the respective 50
extended sticks upon the lumber stack when said car
riage is lowered into proximity with said stack, and means
carried by said carriage effecting said placing substan
1901
2,838,188
Mason ______________ __ June 10, 1958
141,624
Sweden _______________ __ Aug. 4, 1953
FOREIGN PATENTS
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