The push-back is an accumulative storage system that allows the storage of several pallets deep per level. The loading units are pushed back into the channel by the lift truck.
There are two different technical solutions: a) push-back on platforms and b) push-bak on rollers.
This storage system applies the LIFO principle (last in, first out). When a pallet is unloaded, the remaining pallets move forward, positioning the next pallet ready for collection.
It is an ideal system for products of medium / high turnover, with two or more pallets by reference.
This storage solution follows the LIFO pattern (Last-In, First-Out) meaning that the last pallet introduced into the racking is the first that can be removed.
With this solution, the operator has to push back the pallets stored with the handling equipment, to make room for the new pallet to be stored on the racking.
For unloading the pallets, the push-back system works like a pallet live storage system. When the pallet at the picking face is removed, the next pallet falls by gravity in a controlled manner by means of brakes, and positions itself on the picking face ready to be retrieved.
Attending the moving part and the way the pallets are stored in the depth, there are two possible technical solutions:
From a constructive perspective, the racking structure is quite similar to a pallet live storage system, in which either platforms or alternatively roller sets rest on the racking beams to achieve the necessary slope (3 – 4%) which permits subsequent gravity displacements of the load units.
