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Патент USA US2403673

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July 9, 194e.
E._c. -MEAD
>
,2,403,673
LUMBER FEEDÍNQ CONVEYER FOR SAW TRIMMEBS '
I
_Filed March 17, 1944
'
'
/NvE/vroe
E/_MER C'. M940
WW'
Arron/vga’. '
2,403,673
Patented July 9, 1946
UNITED STATES PATENT CFFICE
2,403,673.
LUNlBER FEEDING CONVEYER FOR
SAW TRIMIYIERS
Elmer C. Mead, Scotia, Calif., assigner tov The
Pacific Lumber Company, San Francisco, Calif.,
a corporation of Maine
Application March 17, 1944, SerìalNo. 5263922
(Cl. 1518-34)
4 Claims.
1
invention relates to lumber feeding conveyers- and has» for its principal object improve
ments in such conveyers especially- adapted for
alongltheir length, >it willof course operate with
sin'gle boards'> in the same way,v the pre-bundling
Y
of the boards-made up of boards of about the
same length with >their ends substantially-` aligned
at one. end of the bundle only-as explained'v in the
feeding -of boards to a gang-saw trimmer for
cutting 01T the boards to standard lengths. The
improvement including means for straightening
patent,~ is done-'to greatly increase the output of
or aligning the boards> or bundles> of boards at
the sawing'machine.
-
saw trimmer.
hand, whereas in- thepresent improvement-con'
In thes'awingfmachlne of the patent the' boards
right angles- tol the- direction of travel of the
or bundles of boards» had torbe- placed-upon- the
conveyer and definitely spacing- the> boards or
bundles with respect to the requirements of the 10 laterally >extending portions-‘25|’ -of the guides by
veyer means -is providedï forïdoingthi‘s- and also
insuring that the boards-or bundles-of boards are
Specific features and advantages of the con
struction will appear inthe following description
andaccompanying drawing.
In» the drawing:
suitably spaced _and straightened-up to lie~at~right
15 angles across the V'guide's'_«2 |ï’ whentheyreach them
Fig; 1 is a plan. view of a- portion of the con
veyer and‘trimmer.
Fig. 2 is a side-elevation of my lumber feeding l
conveyer shown in operative relation to a gang
saw trimmer.
Before describing the drawing in detail it
should be stated that my improved lumber feed
ing conveyer is `shown feeding bundles of boards
to an- automatic length selecting cut off saw as
and- in proper' position sothat ~when- the'- next
pusher lugs 22--of -the sawingl machine comelalong,
they will all properly engagethebundle»
The improvement comprises providing a series
of laterally'spaced» conveyer bands- |0| 4which
pass over head pulleys luz-'supported on a shaft
|03 driven by any-suitable >means not shown.
The conveyer bands- |_0ï| are‘here indicated as flat
belts, tho they may'be'ïchains, and they are of
shown in my joint Patent No, 2,332,654 of Octo 25 any desired- length to 'pass over suitable tail pul
leys at the far end not shown. Also these con
ber 26, 1943, and therefore the few elements of
veyer bands are -preferably slid'ably supported as
the sawing machine shown in the present' draw
by guides |04 to better' carry the weight of the
ing are numbered to correspond with the same
lumber bundles B,
elements as- shown in- said patent for easy iden
tiñcation, as the whole saw machine is not shown 30 Conveyer |0| terminates in spaced relation to
the-sawing machine, and bridging the space is a
herein, but only as much as is necessary to show
relatively short chain- conveyer comprising a
its cooperative relation to the special lumber feed..
spaced series of endless chains |05 passing over
ing conveyer and tripping arrangement consti
sprockets |05, |01 respectively supported on
tuting the present invention.
In the patent and in the present drawing the 35 shafts |08, |09, the latter being driven by a chain
||0 from shaft 21`v of‘the sawing machine as by
automatic length selecting cut oif saw machine
sprockets || | and`||»2'.
comprises a frame I with a series of horizontally
Shaft |08 -is spaced to the left of shaft |03 so
disposed lumber supporting rails or guides 2|
that conveyers |0|-and |05: will be in overlapping
along which guides bundles of lumber B extend
ling transversely of the rails, are moved by the 40 relation and so-'that the bundles of lumber com
ing along in direction of tl'iel arrows on conveyer
pusher lugs 22 of a series of- endless traveling
|0| may be transferred from conveyer- |0| to con
chains 23, past a series of spacedv circular saws
veyer |05, but means is provided to control such
6. These saws are normally depressed below the
a transfer whichv comprises` a pair of shafts ||3,
bundles of lumber, and by reason of certain trips
operated by one end of- the bundle one saw only 45 ||3’ extending parallel with shafts | 03 and |08
but to> the left' of the latter and which shafts
rises to trim oiî- that end of the bundle to make
each carry a series of stop arms ||4, H4' extend
the boards in that particular bundle all of a
ing laterally t‘o the right, and which arms may
standard length. 'I‘he series of endless chains 23
be alternately rocked (with their shafts) from
are supported over suitable wheels or sprockets
20 and 25 mounted on shafts 26, 21 and all driven 50 a position substantially parallel with and below
the upper plane of‘conveyer |0|, to an angularly
in unison by shaft 21, all as described in said
raised position extending above the plane of the
patent.
conveyer as shown respectively for arms | I4’ and
While the drawing shows the saw machine as
| I4, by means of a piston rod | I5 of a double act
operating, on bundles of boards which are tied
together with ropes or'wires 63 at spaced points 55 ing air` cylinder |13' operatively> connected to a
...ux
2,403,673
3
ported in bearings |30 in turn supported on suit
able framework |3|.
Having thus described my improved lumber
feeder for sawing machines it will be evident to
those skilled in the art that in place of air op
crated cylinder H6 hydraulic operation may be
resorted to,~ also that numerous other details may
be changed within the scope of the invention, and
I therefore claim:
l. In a lumber feeder of the character de
rocker arm H1 linked at opposite ends respec
tively by rods H8, H8’ to arms H4, H4’.
The air cylinder is pivotally connected as at
||9 to its base plate |20 to compensate for arcu
ate motion of the rocker arm, and is connected
to a common so-called four-way air control valve
|23 positioned -under the sawing machine and
which valve has an 'operating lever. |24~ linked as
at |25 to a. tripping lever |26 pivotally mounted
as at |21 to the frame of the sawing machine in
position so that the upper end |21’ of the trip
scribed, a multiple strand conveyer across the
strands of which the lumber extends, a purality
of supporting arms beneath the conveyer, and
means pivotally _mounting said arms for >slant
ed projection upward between the conveyer
ping lever will be tripped by each vof the chain
lugs 22 of the traveling chains 23 of the machine
and will at once return upon passing of the lug
by the action of a return spring |28,
.
strands so as to force the lumber to ride up
on said arms and stop while the cenveyer con
Compressed air is supplied from any suitable
source to the valve |23 and normally (with the
valve lever |24 in un-tripped position as shown
in the drawing) the pressure is at the right-hand
or underside of the airf’cylinder piston |29 and
arms vH4 are therebylifted at an angle to inter
ceptgthe îoncoming bundle of lumber and support
it `above conveyer` chains, which are preferably
just atriñe higherthan-belts | 0 | .
. ¿
y
-
A
tinues to'travel beneath the lumber, and timed
means for lowering said arms to permit said
bundle to continue its travel, said arms provid
ed with a deñnitestop carried by the arms, at
_their outer ends to limit the movement of the
` lumber up on said arms, andv which- stop is
lowered" with the arms below the level of the
,en thecontrol--valve-lever |24 is tripped by 25
the.- passing fof a,-lug 22 >it switches the air pres
sure from hose |2| to hose |22 While exhausting
conveyer when the arms are lowered.
l.
, v_ .
2.1m a lumber feeder of the character de
scribed, a multiple strand conveyer across Athe
strands of which the lumber extends, _aplurality
of supporting arms beneath the conveyer, and
the former; to atmosphere in the well-known way
chair-controlvalves; ¿and -thus forces the piston
means `pivotallymounting >said arms for >slanted
projection upward between the conveyer strands
so as to force the lumber <to ride up on said
new' thesawmggnacmne: guides 2|', while at the
arms and stop while `the conveyer ¿continues to
saineÍlÄtime >arms H4’ rise *abovev the conveyer.
travel beneath the lumber, andtimed means for
The >speed .ofÜohainsflûâ is so determined by
~ their direct gearing to the machine chains 23 35 lowerin/g said arms to permit said bundle to
continue its travel, their being two sets of said
thronghthe'common driving shaft 21 that by
supporting arms, one set following the other set
the-.time theY lug 22 which tripped- the valve
|29 îback, tn_.lower -the arms H4 Àand deposit the
lumber-„_bundle; upon chains |05 which carry
comes `lip-around sprocket 24, the bundle from
arms H4 Ais in advance of the -lug as indicated
i?lFig. 42Min dotted lines at B, in position ready
tolbe engaged and carried under suitable hold
downfbarslSZ and past the saws.
The'moment the bundle has been deposited
from. arms' U14-to chains |05, the other set of
amis-H4'V have risen up to intercept the next
30
in direction of travel of the lumber, and >actu
ating means for the two sets of arms so arranged
40 as to lower one set vof arms and raise the »other
set and vice versa.
_
`
_
3. Ina lumber feeder >of the character de
bundle, (if one-is close at hand) or lift a bundle
scribed, a multiple strand ñrst conveyer across
the strands of which the lumber extends, a plu
rality of supporting arms beneath the conveyer,
and means pivotally mounting said arms for
whichdnayalready be upon it, to prevent the
possibility of two bundles being passed to the
-strands so as to force the lumber to ride up on
roughly _spaced as to sawing machine require
ments and may or may not be extending at right
operated means for raising and lowering said
arms, a trip operated remote control air valve
slanted projection upward between the conveyer
said arms and stopwhile the conveyer continues
saw. As soon as the leaving bundle has cleared
arms H4 they, rise again as spring |28 returns 50 to travel beneath the lumber, and timed means
for lowering said arms to permit said bundle to
the' tripped air valve |23 to position shown in
continue its travel, and a second multiple strand
the drawing, and arms H4' are lowered again
conveyer in overlapping end relation with the
to therebyv transfer their bundle (if any) from
first conveyer which receives the bundle when
arms'Hd' to arms H4, or if not arms ||4 being
slanted above the conveyer will intercept the 55 the arms are lowered for carrying it to a ma
chine to be fed, said machine having a multiple
next bundle of .lumber >coming along._ The ex
strand feed conveyer in overlapping end rela
treme ends of the arms arepreferably turned up
tion with the second conveyer provided with a
a triiie to form aligning v`stops |33 as indicat
lumber engaging- lug projecting therefrom for
ed in the drawing. The bundles are made up at
a, remote point and placed on conveyer |0| 60 carrying lumber to said machine, compressed air
angles across the conveyer, but as each one starts
t'o ride up the inclined stop arms it automatically
mounted on said machine for controlling said
air operated means, said lug arranged to operate
is swung into correct position so as to insure the 65 said trip as „it moves along to lower said arms
so that the lumber will be advanced to the ma
lugs 22 of the several chains of the sawing ma
chine all coming up behind it after the bundle
has been transferred to the machine by the in
termediate feederconveyer |05.
'
_ _It islof course understood that the conveyers
IBI andi |85 are of a total breadth to handle the
longest lumber desired to be trimmed, or in other
chine in timed relation to Ibe engaged by said
lug.
1
'
- 4. In a lumber feeder of the character de
scribed, a multiple strand ñrst conveyer
lo Vthe
strands lof which the lumber extends,
across
a plu
rälity of supporting arms beneath the conveyer,
and means pivotally mounting said arms for
words,. aboutV equal to the total length of the
slanted projection upward between theconveyer
sawing .machine which they are used to feed,
andalsd that the various shafts are suitably sup 75 strands sov as to force the lumber to ride upon
2,403,673
6
said arms and stop while the conveyer continues
to travel beneath the lumber, and timed means
for lowering said arms to permit said bundle to
continue its travel, and a second multiple strand
conveyer in overlapping end relation with the
first conveyer which receives the bundle when
machine, compressed air operated means for
raising and lowering said arms, a trip operated
remote control air valve mounted on said ma
chine for controlling said air operated means,
said lugs arranged to successively operate said
trip as they move along to lower said arms so
the arms are lowered for carrying it to a ma
that the lumber will be advanced to the machine
chine to -be fed, said machine having a multiple
strand feed conveyer in overlapping end rela
in timed relation to be engaged by the tripping
lug, and means automatically reversing sai
tion with the second conveyer provided with a 1o valve upon passing of a tripping lug.
plurality of spaced lumber engaging lugs pro
jecting therefrom for carrying lumber to said
.
ELMER. C. MEAD. `
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