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Патент USA US3082897

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March 26, 1963
c. w. BOPP
3,082,889
MATERIAL-HANDLING APPARATUS
Filed Dec. 14, 1959
2 Sheets-Sheet 1
IN VEN TOR.
C. W. BOPP
ATTORNEY
March 26, 1963
c. w. BOPP
3,082,889
MATERIAL-HANDLING APPARATUS
Filed Dec. 14, 1959
2 Sheets-Sheet 2
ATTORNEY
United States Patent O?fice
V
amass
Patented Mar. 26, 1963
2
1
FIGURE 8 is a schematic diagram of the cable and
s,es2,ss9
sheave arrangement for moving the forkucarrying trolley.
MATERIAL-HANDLING APPARATUS
FIGURE 9 is a schematic illustration of the cable and
sheave means for adjusting the fork vertically.
In the environment chosen for illustration, the numeral
Cecil W. Bopp, Waterloo, Iowa, assignor to Bopp Mfg.
Inc, Waterloo, Iowa, a corporation of Iowa
Filed Dec. 14, 1959, Ser. No. 859,408
2 (Jlaims. (Cl. 214-75)
10 represents the bed of a conventional motor truck.
In broken lines there are illustrated, at 12, a plurality
of cubes of concrete blocks. As is known to those skilled
in the art, the cube of blocks is made up of a plurality of
This invention relates to material-handling apparatus
and more particularly to a specialized type of universally
mounted vehicle-carried apparatus for handling building 10 blocks arranged in layers or tiers and conventionally
handled in manufacture by known palleting means.
Blocks of this nature are used in the foundations and
walls of certain types of buildings.
According to one preferred installation of material
handling apparatus, a truck such as that shown is modi
?ed ‘by the addition thereto of load-handling means com
prising, in part, a rigid supporting structure in the form
of a pedestal 14 mounted on and rising from the bed
10. The pedestal comprises a central member in the
material such as concrete blocks and the like.
"It has heretofore been proposed to mount a conven
tional ?at-bed vehicle with a mast on which is mounted
a boom capable of swinging about a horizontal axis.
The boom carries a lift fork for movement lengthwise of
the boom and for adjustment vertically, all properly co~
ordinated and controlled to facilitate the handling of
concrete blocks used in the building industry. Apparatus
of this type has been relatively commercially successful
but some limitations on the use thereof have arisen be
20 form of a hollow or tubular column 16 terminating at an
upper end 18 from which braces 2d extend laterally and
forwardly. In the application [of the structure to the
truck bed, a portion of the bed is cut out, at least to
in cases in which excavations and the like are relatively
the extent of providing an opening 22 with which the
deep, or in which Walls become relatively high, because
in the past the height of the mast has determined the 25 lower end of the column 16 is in vertical register. This
enables the mounting in the column 16 of a vertical
height to which the load may be lifted, or, conversely,
spindle or mast 24 which rises to an upper end 26 spaced
the depth to which the load may be lowered, as from
above the upper end 18 of the column 16 and which has
an embankment into an excavation or hollow.
a lower end 28 provided with a sprocket 39 about which
According to the present invention, apparatus of the
is wrapped a chain 32 that has its opposite ends con
character previously known has been considerably im
nected respectively to a pair of two-way hydraulic motors
proved by the provision of means mounting the boom
cause of the inability of prior structures to operate
through the desired range, This is particularly evident
on the mast for swinging about a horizontal axis in addi
tion to its swinging about a vertical axis. The boom is
34.
The motors are mounted in any suitable manner
beneath the bed of the truck and are anchored thereon
so that selective application of ?uid pressure to the mo
provided with power-operated means for changing its
angle relative to the horizontal. This, in combination 35 tor rotates the sprocket, and consequently the spindle
24, in opposite directions about the vertical axis of the
with the means whereby the lift fork is mounted for
spindle and column. The truck power plant (not shown)
movement lengthwise of the boom renders the boom sub
may drive a suitable pump P which supplies a valve V1
stantially universal in operation and application. The
which in turn is ?uid-connected to the motors 34. Any
power-operated devices are preferably hydraulic and are
coordinated with the other hydraulic devices that are 40 type of connection may be used. That shown is a paral
lel connection. For example, ?uid supplied to one end
used for the purpose of swinging the boom about its
of one of the motors operates to retract the piston there
vertical axis, for moving the fork lengthwise of the boom,
in and fluid exhausted from the other end is led to the
and for raising and lowering the fork. The invention
opposite end of the other motor as the piston in that other
features the provision of a simpli?ed design enabling the
conversion of existing structures to incorporate the novel 45 motor extends, with the result that the chain 32 trans
mits forces capable of rotating the sprocket 3G and
swingability of the boom about a horizontal axis in
spindle 24. As indicated, any other form of means may
combination with its swinging about a vertical axis, along
be utilized for turning the spindle about its upright axis.
with the novel functions obtained because ‘of the move
Suitable bearings, not important here, journal the
ment of the fork-carrying means or trolley lengthwise of
50 spindle 24 in the colunm .16 so that the spindle is capable
the boom.
'
The foregoing and other important objects and desir
able features inherent in and encompassed by the inven
tion will become apparent as preferred embodiment there
of carrying at its upper end 26 a relatively long normally
horizontally positioned boom 36. In its transport posi
tion, the boom may be supported at its forward or free
end by suitable structure designated generally by the nu
of is disclosed, by way of example, in the ensuing descrip
tion and accompanying sheets of drawings, the ?gures 55 meral 38 and not important here except as representative
of which are described below.
FIGURE 1 is a side elevational view, with portions
broken away, showing a typical installation of a truck
mounted loader of the character referred to.
FIGURE 2 is a plan view, with portions broken away,
of the same.
FIGURE 3 is an enlarged section on the line 3-—3 of
FIGURE 1.
]FIGURE 4 is a schematic diagram of a typical hy
draulic circuit for controlilng the several hydraulic mo 65
tors.
FIGURE 5 is a side elevational view showing some
of the possibilities capable of achievement by the swing
of any form of means that could be used. When the
boom is to be swung about the vertical axis of the col
umn, along with the spindle 24, the structure 38 is, of
course, released. The mounting of the rear end of the
boom 3d on the upper end of the spindle 24 is best illus—
trated in FIGURE 3, wherein it will be seen that the
upper end 26 of the spindle is reinforced by the provision
thereon of suitable bearings 40 coaxial on a transverse
horizontal axis, which bearings receive a transverse pivot
shaft 42. In the particular arrangement shown, the boom
extends rearwardly beyond the axis of the pivot shaft
42 so as to include rigidly therein a rear lever arm por
tion 44, and the immediate portion of the boom forwardly
of the pivot shaft 42 may be regarded as another lever
able boom.
FIGURE 6 is an enlarged fragmentary section on the 70 arm portion 4-6. These lever arm portions are appro
priately interconnected with mechanism to be presently
line 6—6 of FIGURE 2.
described for selectively holding the boom in its hori
FIGURE 7 is a section on the line 7-7 of FIGURE 6.
aosasso
3
zonal position or for swinging same about the axis of the
pivot shaft 42, as indicated in broken lines in FIGURES ,
1 and 5.
For this purpose, the spindle 24 has rigidly thereon
anchor means including front and rear apertured cars
43 and 50. These are diametrically opposed as respects
the axis of the spindle 24 and lie generally respectively
below the lever arm portions 46 and 44. A ?rst force
exerting device, in the form of a hydraulic rain or cylin
A
will be applied to the cable 79 for raising and lowering
the fork sheave 68 and consequently for raising and
lowering the fork ‘64 suspended thereby. The cable and
sheave arrangement affords the necessary multiplication
of force to handle the relatively heavy loads encountered.
During raising and lowering of the ‘fork, the carriage or
trolley 72 may remain stationary.
The ram 92 may be
controlled by a valve V3 (FIGURE 4) which, like the
valves already described, is independently operative to
der-and-piston assembly 52 is arranged between the 10 represent a control mechanism independent of the others
anchor lug 4S and the lever arm portion 46, the cylinder
and controlling its own power-operated device 92.
being connected to the latter at 54 ‘and the piston being
The position of the trolley or carriage 72 lengthwise
connected to the former at 56. A second and similar de
of the boom 36 is under the control of additional control
vice in the form of a second hydraulic ram 58 has its
means for operating a power-operated device, here a
cylinder connected at 60 to the lever arm portion 44 and 15 fourth hydraulic ram 93. As best seen in FIGURE 2,
further has its piston connected at 62 to the other anchor
this ram is located intermediate the side members of the
lug 5i). On the basis of the position shown in full lines
boom 36 and the cylinder of the ram is anchored to the
in FIGURE 1, it will be evident that fluid supplied to the
boom in any appropriate manner, the piston of the ram
motor 58 to contract or retract same will cause the ram
is anchored to the boom and the cylinder of the ram car
to pull downwardly on the lever arm portion 44, thus
ries a sheave 100 about which a cable 162 is trained.
swinging the boom 36 upwardly ‘about the axis of the
The anchor for the piston also includes a sheave 164
pivot shaft 42. To augment the action of the ram or
and one run of the cable is trained additionally about this
motor 53, the ram and the other ram 52 are connected
sheave and is anchored at 106 to any appropriate portion
together hydraulically so that as the ram 53 is con
of the boom (FIGURE 8). The sheave 16-’!- is of the
tracted, the ram 52 is expanded or extended. In the range 25 multiple type so that the cable may be trained there
of operations for the apparatus to which it is normally
about a number of times, and the cable ultimately ex
put, it is su?'icient that the boom 36 be swingable about
tends to the forward end of the boom Where it is trained
the axis of the shaft 42 between the horizontal position
shown and ‘any one of a plurality of upward positions.
it is found that a vertical range on the order of 45-60“
to the horizontal will accomplish the necessary functions
and give the apparatus adequate ?exibility. The sche
matic diagram in FIGURE 4 shows the connections of
the rams S2 and 58 to a valve V, which is suitably con
nected to the previously described pump P. The valves
V1 and V; are connected in the circuit so that each is
independently operable apart from the other, the two
about another sheave 198, thence back about the multiple
sheave 1M and back to aforward anchor 110 on the
boom. A portion of the cable intermediate the sheaves
104. and ltlti is ?xed in any suitable manner to the car
riage 72, as shown at 112. Hence, extension and retrac
tion of the ram 98 will cause the trolley or carriage 72
to move lengthwise of the boom. It will be understood
that the diamensional characteristics of the cable and
sheave arrangements described for both the fork and
trolley are such that the desired range of movement can
valves affording control mechanisms for the two power
be accomplished, due regard being had to the fact that
means thus far described; namely, the means 34 and the
FIGURES 8 and 9 are schematic. The ram 98 is under
40
means 52-58. In view of the fact that the horizontal
control of a valve V2 (FIGURE 4). Here again, the
position as shown in full lines in the drawing is sullicient
valve V2 is operative independently of the other valves
for the boom 36, the size and stroke of the ram 52 is
already described.
such that when it bottoms it determines a lower limit on
In the use and operation of the apparatus, the mecha
movement of the boom 36. If desired, additional stops
nism may be utilized to load the cubes 12 on the bed 10
could be provided.
45 of the truck. In transport, the boom 36 is moved to its
In the prior art, it is known to provide the boom 36,
horizontal position as shown in ful llines in FIGURES
or its equivalent, with means for carrying a load-handling
1 and 5 and is releasably retained by the boom lock 38.
fork, here designated generally by the numeral 64. Such
The fork is conventionally stored in one of the cubes by
forks are customarily provided with normally horizontal
inserting its tines 66 in the lowermost tier or layer of
tines, as at 66 here, which penetrate the apertures conven
blocks, and the cables 7t) and 102 .are tightened to an
tionally formed in the blocks that are cubed in the cubes
extent sufficient to retain the fork in place. When the
12. Since forks of the general character illustrated are
.site is reached, the boom lock 38 is released and the
known, detailed description is not needed. Su?ice it to
control mechanism is operated to achieve the process
know, however, that’ the fork is typically provided at its
of unloading the cubes 12 from the truck. For example,
upper end with a sheave 68 which is suspended in the 55 1n a normal situation, the cable 70 may be tensioned to
loop of a cable 76'. As best shown in FIGURES 6 and 7,
lift the fork-engaged cube 12 from the bed of the truck.
the boom 36 is made up of a pair of inwardly facing
channels which afford a track for the mounting thereon
for movement lengthwise thereof of a carriage or trolley
72. This trolley is provided with small rollers 74- which
ride in the track afforded by the boom 36 and is addi
tionally provided with a pair of pulleys or sheaves 76
Since the trolley motor 98 will ‘be hydraulically locked,
the trolley will be ?xed in position so that the cable 70
may be operated to react about the sheaves 76 to raise
and lower the fork sheave 68. When the cube is free
from the truck, the motors 34 may be operated to swing
the boom 36 in the appropriate direction. When the
over which opposite runs of the cable 70 are trained.
boom attains its proper position angularly about its up
The forward run of the cable 70' may be anchored at'78
right axis, the application of ?uid pressure to the motors
to a forward portion of the boom 36, and the other run is 65 ‘:34 may be stopped, thus hydraulically locking the boom
trained about a plurality of sheaves 80 and 82 and ulti
III that position. The fork motor 92 may now be hy
mately anchored at 84 to a rear portion of the boom.
draulically locked and the valve V2 operated to cause the
The sheaves 8d arecarried on a common shaft, as at 86,
motor 93 to move the trolley lengthwise of the boom in
and thesheaves 82 are carried likewise on a common
the desired direction. When theproper radius or reach
sraft 88 which is in turn mounted on a yoke that is con 70 has been attained, the fork motor 92 may be operated to
nected to a piston 90 of a hydraulic ram 92. The opposite
raise or lower the fork, and its load of blocks, to the
end of the ram 92 is appropriately anchored to an outer
desired position.
'
portion of the boom 36, as at 94, and the shaft 86 for
the sheaves 3t: is journaled in an ‘appropriate bracket at
In those cases Where the vertical range exceeds the
length of the cable 70, the motors 52 and 58 may be
96 so that when the ram is extended and contracted, force 75 operated to tilt the boom 36 upwardly about the trans
3,082,889
6
5
verse axis of the shaft 42, thus increasing the range or
reach of the .apparatus. The mounting of the boom 36
one terminal position closely adjacent to the spindle and
another terminal position at the remote end of the boom;
as described is more than a simple derrick, because of
second power means for moving the carriage; a load
the movability of the carriage or trolley 72 lengthwise
handling fork vertically adjustably carried by the car~
riage at any of said carriage positions; third power means
for adjusting the fork; and ?rst, second and third control
means independent of each other and of said controllable
means and operative singly and in combination with said
controllable means for selectively operating the control
thereof. FIGURE 5 illustrates that the carriage may
be moved completely to the rear so as to position the
fork 64 in a location where it will engage the cube 12
next forwardly adjacent to the pedestal 14. The boom
may then be elevated to the position shown in broken
lines and the fork 64 may be run out to the end, as also 10 lable means and the ?rst, second ‘and third power means,
respectively to secure various combinations of boom
shown in broken lines. In a typical derrick situation, the
tilting, spindle turning, carriage movement and fork ad
only way that the fork 64 could reach the cube illus
justment.
trated next adjacent to the pedestal 14 would be to swing
2. In combination with a motor vehicle having a load
the derrick to its extreme upward position and then to
allow the fork to descend. In the present case, the 15 bed, mechanism for handling concrete blocks and the
like, comprising: a pedestal element rigidly attached to
fork is enabled to pick up the cube in question and may
the vehicle and rising from said bed to a terminal top
thereafter move it to any desired position within the reach
end; an upright spindle element journaled on the pedestal
of the universally mounted boom.
element to turn about a vertical axis .and having an upper
The addition of the boom-tilting rams 52 and 58 to
the structure is extremely simple yet the functions are 20 end above the top end of the pedestal element; a normal
of substantial signi?cance, 2because the over-all ?exibility
of the apparatus is tremendously increased. The design
ly horizontally positioned boom of ?xed length having
is such that the rams may be readily added to existing
one end proximate to and its other end remote from the
upper end of the spindle element, said proximate end in
structures to convert same to the universal type boom dis
cluding lever arm portions lengthwise thereof and rigid
closed herein. Features and advantages other than those 25 therewith and extending respectively to opposite sides of
the spindle element; pivot means connecting said proxi
categorically enumerated will readily occur to those
mate end of the boom to the upper end of the spindle
versed in the art, as will many modi?cations and altera
element on .an axis transverse to the length of the boo-m
tions in the preferred embodiments set forth, all of which
and intermediate said lever arm portions; anchor means
may be achieved without departure from the spirit and
on
the spindle element intermediate the boom and the
scope of the invention.
30
top end of the pedestal element and including a pair of
What is claimed is:
motor mounts in diametrically opposed relation at oppo~
1. In combination with a motor vehicle having a load
site sides of the spindle element to lie respectively gen
bed, mechanism for handling concrete blocks and the like,
erally below the lever arm portions; a pair of selectively
comprising: a pedestal element having means rigidly at
taching same to the vehicle, said element rising from said 35 expansible and contractible ?uid motors connected re
spectively between the mounts and the respective lever
bed as a hollow column having a terminal top end, and
arm portions; controllable ?uid pressure means connected
said bed having an opening therein in vertical register
to and for selectively expanding one motor while con
with the lower end of said element; an upright spindle
tracting the other to tilt the boom up and down about
element journaled in the pedestal element to turn about
said pivot means; ?rst power means connected to and
the axis of said column ‘and having .a lower end below
the bed and an upper end above the top end of the
for turning the spindle element about ‘its vertical axis;
column; a normally horizontally positioned boom of ?xed
a carriage carried by and for movement selectively back
and forth lengthwise of the boom through a range of
length having one end proximate to and its other end
remote from the upper end of the spindle element, said
proximate end including lever arm portions lengthwise
thereof and rigid therewith and extending respectively
to opposite sides of the spindle element; pivot means
connecting said proximate end of the boom to the upper
positions including one terminal position closely adjacent
to the spindle and another terminal position at the re
mote end of the boom; second power means for moving
the carriage; a load-handling fork vertically adjustably
carried by the carriage at any of said carriage positions;
third power means for adjusting the fork; and ?rst, sec
end of the spindle element on an axis transverse to the
length of the boom and intermediate said lever arm por 50 ond and third control means independent of each other
and of said controllable means and operative singly and
tions; anchor means on the spindle element intermediate
In combination with said controllable means for selectively
the boom and the top end of the pedestal element and in
cluding a pair of motor mounts in diametrically opposed
relation at opposite sides of the spindle element to lie
respectively generally below the lever arm portions; a
pair of selectively expansible and contractible ?uid motors
connected respectively between the mounts and the re
spective lever arm portions; controllable ?uid pressure
operating the controllable means and the ?rst, second
and third power means, respectively to secure various
combinations of boom tilting, spindle turning, carriage
movement and fork adjustment.
References Qited in the ?le of this patent
UNITED STATES PATENTS
means connected to and for selectively expanding one
motor while contracting the other to tilt the boom up 60
and down about said pivot means; ?rst power means
connected to the. lower end of the spindle element be
neath the bed for turning the spindle element and boom
about the axis of the spindle element; .a carriage carried
by and for movement selectively back and forth length 65
wise of the boom through a range of positions including
2,755,939
2,772,789
2,858,944
2,919,036
'
298,837
Rush _______________ __ July 24,
Hussong _____________ __ Dec. 4,
Hutchinson __________ __ Nov. 4,
Raymond ___________ __ Dec. 29,
1956
1956
1958
1959
FOREIGN PATENTS
Great Britain ________ __ Oct. 18, 1928
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