Material or article handling – Plural – static structures for supporting discrete loads and... – Load-underlying members
Patent
1994-01-10
1996-10-22
Dayoan, D. Glenn
Material or article handling
Plural, static structures for supporting discrete loads and...
Load-underlying members
4147963, 4147964, 414907, B65G 5900
Patent
active
055671020
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method and apparatus for correcting load appearance.
PRIOR ART STATEMENT
(A) In a prior art apparatus for load appearance correction, the load appearance is corrected by securing a pallet and clamping and pushing the opposite sides of a load on the pallet with a pair of opposed load appearance correction plates.
In the prior art, however, where a plurality of loads each placed on a pallet as each stage is stacked one above another, the appearance correction of each stage load can not be obtained for the following reasons.
1 If the appearance of the vertically stacked loads is to be corrected while the loads are in the stack, lower stage loads on pallets can not be moved freely because of the weight of the upper stage loads exerted on them, and it is possible to cause damage to cardboard boxes as their packing.
2 As a load supported on a pallet, usually the load is accommodated within the pallet (i.e., the load has a width smaller than the width of the pallet). Therefore, when the sides of a load on a pallet are to be pushed with the pair load appearance correction plates, the upper stage pallet constitute an obstacle to prevent the pushing of the load sides.
It is an object of the present invention to permit correction of the appearance of a stack of loads each placed on a pallet at each stage.
(B) In another aspect, in distribution centers, loads are prearranged with a load appearance corrector before they are brought into an automatic warehouse.
Loads are transported on trucks in a state that cardboard boxes accommodating them are stacked on pallets (i.e., in a pallet load appearance). When they arrive at the distribution center, therefore, they have been deviated beyond the pallets or about to be crumbled. If they are introduced in this state into the warehouse, they are likely to be crumbled or caught by cranes or shelves as they are conveyed. For this reason, the appearance of the loads is corrected in advance to a proper appearance with a load appearance corrector.
When pallet loads are stacked one above another as individual stages, the stack is disassembled into the individual stage pallet loads for appearance correction thereof one after another with a load appearance corrector, and the appearance corrected pallet loads are then introduced one after another into the warehouse.
In the prior art, however, there are the following problems 1 and 2.
1 Loads in the stack can not be handled for appearance correction while they are in the stack. Therefore, an operation of disassembling the load stack into individual pallet loads has to be done in front of the load appearance corrector. This means inferior efficiency of in-feeding of the load into the warehouse
2 In the case when individual stage loads in a stack are of the same kind, the stack is disassembled as in 1 above for appearance correction of each disassembled pallet load, and the individual appearance corrected loads are stacked again before they are fed in the warehouse. Therefore, the in-feeding efficiency is again inferior.
It is another object of the invention to improve the efficiency of in-feeding appearance corrected loads in a stack into the warehouse.
(C) In a further aspect, in the prior art load appearance corrector the load appearance correction is done by securing a pallet and clamping and pushing the opposite sides of a load that is placed on the pallet With a pair of opposed load appearance correction plates, as shown in FIG. 23. In this case, as pushers for pushing the load appearance correction plates are used those which have a cushioning property such as air cylinders so that the loads can be appearance corrected without being crushed by pushing.
In the prior art however, the pusher for pushing each load appearance correction plate effects only a single stage of the pushing operation. Therefore, if stacked loads are deviated beyond the pallet as shown in FIG. 22(A), the load appearance correction plate which is on the side of the loads that is found beyond the palle
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Dayoan D. Glenn
Kao Corporation
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