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Патент USA US3071276

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Jan. î, 1963
Original Filed July 3, 1958
2 Sheets-Sheet 1
wm.vm \
Jan. l, 1963
original Filed July s, 195s
2 Sheets-Sheet 2
Om Nm
rates Patent Office
Patented Jan. l, 1953
suitable synchronizing gear 22, to the shafts 24 on which
the sprocket wheels 26 are mounted. Thus, when the
motor 20 is turned the shafts 24 will be turned, and
Rinehard Fries and Hubert J. Moors, Fraser, Mich., as
through pulley wheels 26 and chains 16, the receiving
signors to The Gene Olsen Corporation, Adrian, Mich.,
a corporation of Michigan
@riginal application .lilly 3, 1958, Ser. No. 746,473, now
Patent No. 2,917,191, dated Dec. 15, 1959. Divided
and this application Aug. 6, 1959, Ser. No. 832,852
1 Claim. (Cl. 214-152)
conveyor 14 will be raised or lowered, depending on the
The present invention relates to a method of unloading
buÍlding blocks from multi-deck racks during one of the
direction of rotation of motor 2l).
The framework for the elevator 12' includes the sta
tionary vertical beams 28 at one end and the stationary
vertical beams 30 at the other end of the elevator 12.
10 Tracks, not shown, are formed on the inner sides of these
beams on which the receiving conveyor 14 is adapted to
stages of manufacture of the blocks. This is a division
Mounted on one end of the receiving conveyor 14 is
are initially formed in molds and are subsequently heated
in order to harden or cure them. The molding of the
block unloader mechanism 34 which includes the parallel
cantilever beams 36 rigidly secured to plate 32 and the
block pusher mechanism 38 suspended from the free end
of cantilever beam 36. The block pusher mechanism 38
a rigid plate 32 which is open in its central portion for
of pending application, Serial No. 746,473, filed July
the passage of blocks therethrough and which overlies
3, 1958.
the vertical beams 30. Connected to the plate 32 is a
In the manufacture of building blocks, the green blocks
blocks is generally accomplished continuously and auto
matically in molding machines. The green blocks are
transferred from the molding machine on pallets which
are carried on a conveyor.
The latter carries the loaded
pallets to a station where the loaded pallets are placed
on multi-deck racks for transfer to autoclaves where the
curing operation is performed.
Since this is a continuous operation, it is necessary
that the maximum number of blocks be accommodated
in the autoclave d-uring each curing operation, and for
this reason the decks of the racks are spaced as close
together as is possible. As soon as the curing operation
is completed the loaded racks are removed from the
autoclave, and it is then desirable to remove the blocks
from the racks and pallets so that such racks and pallets
can be returned to the molding machine for further use.
Prolonged storing of the cured blocks in the racks is
uneconomical, because of the cost involved and the space
required for keeping enough racks on hand to allow the
continuous operation of the molding equipment.
It is an object of the present invention to provide a
has a plurality of rigid frame members 40, and a shaft
42 is journaled under the beams 36 with the arms 44 and
46 connected thereto for turning therewith. A hydraulic
piston and cylinder 48 is connected at its one end to the
free end of arm 44 and at its other end to the stationary
bracket 5o. Thus, expansion of the hydraulic piston and
cylinder 48 will cause shaft 42 to rotate in a clockwise
direction as seen in FIGURE l, and retraction of the
hydraulic piston and cylinder 48 will cause shaft 42 to
rotate in a counter~clockwise direction. The arms 46
which are connected to shaft 42 are thereby turned in
the same clockwise and counter-clockwise directions. The
free ends of arms 46 are operatively connected to the
block pushers 52 for moving the latter horizontally to
ward and from the elevator 12 for a purpose to be more
fully described.
Referring to FIGURE 3, a brief description will be
given of the manner in which the arms 46 and the block
pushers 52 are operatively connected. A carrier 54 has
method of unloading building blocks from multi-deck 40 wheels 56 at its four corners which are adapted to travel
in tracks 58 in the inner side of lower frame members
racks wherein the steps of operation are characterized
4t). Links 6d are pivotally connected respectively at one
by their simplicity and speed of operation as well as their
end to the carrier 54 by the pins 62 and at the other end
eíñciency in handling the blocks.
the arms 46 by the pins 64. Thus, the links 60 will
Other objects of this invention will appear in the fol
accommodate the vertical component of movement of
lowing description and appended claim, reference being
arms 46 while the horizontal component of movement
had to the accompanying drawings forming a part of this
be transmitted to the carrier 54. Since the carrier
specification wherein like reference characters designate
54 has the block pushers 52 rigidly attached thereto, the
corresponding parts in the several views.
horizontal movements will be transmitted to such block
In the drawings:
50 pushers 52. ln this manner, actuation of hydraulic piston
FIGURE l is a side elevation illustrating apparatus for
and cylinder 48 will effect horizontal movement of block
carrying out the present invention;
pushers 52.
FIGURE 2 is a top plan of the apparatus illustrated
Positioned between the receiving conveyor 14 and the
in FIGURE l; and
block pusher mechanism 38 is a rack loading and un
FIGURE 3 is an enlarged fragmentary view of a por
loading conveyor 64 which has rails 66 and 68 on which
tion of the apparatus illustrated in FIGURE l.
a multi-deck rack 7l? can travel. A rack actuating bar
Before explaining the present invention in detail, it is
72, FIGURE 2, is positioned at one end of conveyor 64
to be understood that the invention is not limited in its
and is -movable by means of the hydraulic piston and
application to the details of construction and arrange
cylinder assembly 74. The end of conveyor 64 at which
ment of parts illustrated in the accompanying drawings, 60 piston and cylinder assembly 74 is located is the station
since the invention is capable of being carried out by
on which a fully loaded rack "itl will be placed. Actua
other apparatus and of being practiced or carried out in
tion of the bar '72 will move the rack 70 to the position
various ways. Also, it is to be understood that the
shown in FIGURE l between the receiving conveyor 14
phraseology or terminolo-gy employed herein is for the
and the block pusher mechanism 38. Here the blocks
purpose of description and not of limitation.
will be removed from the rack 70, in a manner to be de
Referring now to the drawings, a more detailed de
scribed, and then the empty rack 70 will be pushed to
scription of apparatus for carrying out the present in
the other end of conveyor 64 for removal.
vention will be given. The block transferring apparatus
The racks used for this operation are of a conventional
10 includes an elevator 12 which raises and lowers the
type having a framework adapted to support thevblocks
receiving conveyor 14. The latter is supported by the
on pallets at six deck levels. The spacing between decks is
chains 16 which are attached at their opposite ends to
at a minimum so that the maximum number of
the receiving conveyor 14 and the counter-weight 18.
blocks can be carried in a given volume within the racks.
An elevator motor 2d is drivingly connected, through a
3 .
As was previously stated, the blocks on the multi-deck
rack 70 are supported thereon by pallets, and it is desired
to leave the empty pallets in place on the rack 7€) when
can be carried out by selecting proper push buttons on
an instrument panel (not shown) or the cycle can be
completed by automatic operation wherein limit switches
the blocks are being unloaded.
are employed. For this purpose limit switches 110 and
For this purpose, a re
ciprocable pallet stopper 73 is provided in horizontal
alignment with the pallet (not shown) which is located
on the deck in alignment with the receiving conveyor 14.
A hydraulic piston and cylinder assembly 73a is mounted
on the receiving conveyor 14 and by suitable linkages 73]]
is connected to the pallet stopper ’73 so as to cause recip
rocable movement thereof on expansion and contraction
112 are mounted on the frame members 40 to be engaged
by one of the arms 46 at the ends of its normal path of
movement. Limit switch 112 is in an electric circuit
which will cause piston and cylinder assemblies 48 and
'73a to retract thereby withdrawing the pallet stopper 73
and block pusher 52 to their normal starting positions.
Lirnit switch 110 is in an electric circuit including electric
motor 20 so that when limit switch 110 is closed by the
cylinder assembly 73a is in a hydraulic circuit, to be
return of arm 46, the electric motor 20 will be energized
described, which includes the piston and cylinder assem
lowering the receiving conveyor 14 to the next lower deck
bly 43 so that the block pusher 52 and the pallet stopper
level of the multideck rack 70. The electric motor 20
73 will be advanced substantially simultaneously. The
is stopped by means of a limit switch 114 mounted on
pallet stopper 73 will engage the pallet (not shown) and
the one stationary vertical beam 30 and adapted to be
the block pusher 52 will engage the block thereon push
contacted in sequence by each of the cams on the limit
ing the same onto the receiving conveyor 14. The pallet
switch cams 116 mounted on the plate 32 for vertical
stopper 73 and the block pusher 52 will then be returned 20 movement therewith. The limit switch 114 is in an elec
substantially simultaneously to the normal positions.
tric circuit with the electric motor 20 which circuit is nor
`Positioned at the remote end of the receiving conveyor
mally closed but which is opened when one of the cams
14 from the block pusher mechanism 38 is a cubing table
contacts limit switch 114, such circuit then remaining
75 which has a roller conveyor 76 on its upper surface.
open until closed again by actuation of limit switch 110
The cubing table 7:7 is adapted to receive an entire rack 25 by arm 46. Thus, once the operation of the block pusher
of blocks from the receiving conveyor 14. The blocks
52 has been started in unloading blocks from the top
are normally transferred from the receiving conveyor 14
deck of the multi-deck rack 7G, each of the next succeed
of piston and cylinder assembly 73a. The piston and
to the cubing table 75 when the unloading conveyor 14
ing decks will be unloaded in sequence until the lower
is at the bottom of its vertical travel.
most deck has been unloaded.
This transferring operation is carried out by means of 30
When the receiving conveyor 14 is at its lowermost
a sweep bar 78 carried on a pair of endless chains St)
level the limit switch 118, positioned on beam 3€), will
which extend lengthwise on opposite sides of the receiving
have been contacted by the uppermost of cams 116, there
conveyor 14. The chains Sti extend around the wheels S2
by setting up a circuit with sweep motor 83 but such
which are supported by brackets 84 on a shaft at the one
circuit will remain open until closed by action of limit
end of the receiving conveyor 14. At the other end of
switch 110 on the return stroke of arm 46. The limit
receiving conveyor 14 the chains Sti pass around the two
switch 118 also serves to open the circuit to elevator mo
sets of pulley wheels 86 which are supported by brackets
tor 253 to prevent overrun of the receiving conveyor on
(not shown) mounted on the receiving conveyor 14. A
the down travel.
sweep motor 88 is drivingly connected to the chains Sí)
At this phase of the cycle, closing of the limit switch
for turning the chains 80 at selected times around the 40 19 will close a circuit including the sweep motor 88
pulley wheels 82 and S6, thereby moving the sweep bar
thereby causing the sweep bar '78 to be advanced over
78 outside the right end of the blocks Slt?, FIGURE l,
and behind the blocks on the receiving conveyor 14 and
and thereafter moving the sweep bar to the left to sweep
to sweep the length of receiving conveyor 14 transferring
all blocks 90 oi’f the receiving elevator 14 onto the cubing
the blocks on to the cubing table 74. The sweep bar 78
table 75. This sweep operation will be performed when
will then engage the limit switch 126 opening the forward
the receiving conveyor 14 is level with the cubing table
sweep circuit to the electric sweep motor 83 and starting
75. The sweep bar 78 will then return to its normal
the return sweep circuit of the sweep motor 88, and si
position shown in FIGURE l.
multaneously closing a circuit to the elevator motor 20,
After the blocks have been positioned on the cubing
causing the receiving table 14 to be raised to its upper
table 75 they can be removed by various means, one of
most position.
which is illustrated in FIGURE 1. Here a cubing hoist 50
When the sweep bar has returned and contacted the
92 is transversely movable on a cross track 94, and the
limit switch 122, the latter will open the circuit to the
latter is supported on wheels 96 on the tracks 98 for
swee motor 88, thereby stopping the same. The switch
movement away from cubing table 75. The cubing hoist
122 is also in a circuit where it will act with limit switch
92 is of a conventional design having a hydraulic piston
124, on the beam 30, for starting a new cycle of oper
and cylinder assembly 10G for lifting blocks from the
ation. In this respect, limit switch 124 will be contacted
cubing table 75 and transporting them to a storage place.
by the lowermost of the limit switch cams 116 when the
The cubing hoist 92 is illustrated in FIGURE l after
receiving conveyor 14 reaches its uppermost position.
having lifted six blocks from the cubing table 75 and
This will have the etîect of opening the circuit to the ele
after having been turned ninety degrees so that the ends
vator motor 20 which served to raise the receiving con
of the blocks are visible.
veyor 14 and sets up the aforesaid circuit with the sweep
Located on .the top of the elevator 12 is an electric
return limit switch 122 for starting a new cycle. This
motor 102 for driving the hydraulic pump 104. There
circuit also includes a limit switch 126 on the rail 63 of
are two outlets from the pump 104, one being shown at
the rack conveyor 64 which is normally open and which
106 which is connected by suitable conduits (not shown)
to the piston and cylinder assemblies 48 and 73a so that
these units will be actuated simultaneously, as was pre
viously described. The'other of the outlets, identiñed
by reference number 16d is connected by a suitable con
duit (not shown) to the piston and cylinder assembly
74 for moving the multi-deck racks 75l on the conveyor
Thus, it can be seen that all the movable parts of the
present invention can be actuated by electrical or hy
draulic means. lf desired the complete cycle of operation
will close after the unloaded rack 7€) has been moved
from between the receiving conveyor 14 and the bloclt
pusher mechanism 38 and a loaded rack has been pushed
in place thereof by the actuator bar 72.
Thus, it can be seen that a complete cycle can be per
formed automatically of moving a loaded rack 70 to a
position between the receiving conveyor 14 and the block
pusher mechanism 38, pushing the blocks from each deck
in sequence on to the receiving conveyor 14, when the
last deck has been unloaded sweeping the blocks from
the receiving conveyor 14 on to the cubing table 75 re
turning the sweep bar 78 to its starting position While the
receiving conveyor 14 is being raised to its uppermost
position, replacing the unloaded rack 70 with a fully
loaded rack 70, and thereafter repeating the entire cycle.
Having thus described our invention, we claim:
A method of unloading multi-deck racks which are
carrying palletized articles on said decks, comprising the
steps of elevating a generally horizontal conveyor to a
and the pallet thereon is being held pushing the articles
thereon onto said conveyor thereby pushing against and
displacing such articles that are thereon and effecting an
alignment of the articles on the conveyor, maintaining
said conveyor at a preselected level and moving the
aligned articles to a receiving station, thereafter return
ing said conveyor to its original position, positioning a
second multi-deck rack in place of the unloaded multi
deck rack, and repeating the cycle.
position so that it has its one end adjacent to, facing and
generally level with one of the uppermost or lowermost 10
References Cited in the tile of this patent
decks of a multi-deck rack and holding the pallet thereon
while pushing the articles from such deck onto said con
veyor, moving said conveyor toward the other of said
uppermost or lowermost decks stopping in sequence at
each of the intermediate decks with said one end being 15
Rosener ___'____________ _.. Sept. 6, 1932
Pries ________________ _.. Apr. 28, 1953
positioned adjacent to and facing,r each of said intermedi
Temple _____________ _'__ Sept. 27, 1955
ate decks and While the conveyor is level Wlth each deck
Beckley ______________ __ July 16, 1957
Ashford ______________ __ Dec. 1, 1953
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