SPECIAL SOLUTIONS
Multi-depth automatic storage systems
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The multi-depth feature can be applied to storage systems for both heavy and light loads and is used to increase storage density.In the multi-depth storage systems the load unit can be positioned in front of others already stored in the system. In this way the full depth of the "channels” is utilised with load unit management according to different systems depending on the solution adopted. More specifically, management will be according to the FIFO (first in – first out) system in the case of gravity-fed systems and according to the LIFO (last in – first out) system in the case of push-back or shuttle systems. Cases of double and triple depth are not typical, and are controlled by simpler systems; in the real multi-depth systems, the channels can contain from 4 to 15 load units each.In these cases very high storage density is obtained because the wasted space, i.e. the passage for the stacker crane, represents a small percentage with respect to the space allocated to storage. In the shuttle systems each shelving channel is provided with guides on which a shuttle moves, inserted by the stacker crane in the required channel: the shuttle runs along the channel to the point where the load unit has to be retrieved or deposited.In addition to the above shuttle systems and gravity-fed systems, Armes, with its company Promag, also holds a special patent for production of the UPB storage systems: the dynamic system UPB (Under Pallet Base) takes its name from the bases, provided with special rollers, with which each load unit is provided. A pair of rails is positioned in each channel, sloping in the direction of the corridor, into which the stacker crane pushes (push-back system) the UPB bases, one after the other. When the stacker crane retrieves the first UPB of the channel (LIFO system), those behind drop down by gravity. The UPB system is particularly suitable for handling special types of load unit, as in the case of reels and coils which are difficult to manage with traditional systems. In the multi-depth systems the system supervision software plays a very important role, as it must be able to optimise storage and retrieval to avoid unnecessary movements due to internal shifting for rapid access to the required load unit.
The multi-depth feature can be applied to storage systems for both heavy and light loads and is used to increase storage density.In the multi-depth storage systems the load unit can be positioned in front of others already stored in the system. In this way the full depth of the "channels” is utilised with load unit management according to different systems depending on the solution adopted. More specifically, management will be according to the FIFO (first in – first out) system in the case of gravity-fed systems and according to the LIFO (last in – first out) system in the case of push-back or shuttle systems. Cases of double and triple depth are not typical, and are controlled by simpler systems; in the real multi-depth systems, the channels can contain from 4 to 15 load units each.In these cases very high storage density is obtained because the wasted space, i.e. the passage for the stacker crane, represents a small percentage with respect to the space allocated to storage. In the shuttle systems each shelving channel is provided with guides on which a shuttle moves, inserted by the stacker crane in the required channel: the shuttle runs along the channel to the point where the load unit has to be retrieved or deposited.In addition to the above shuttle systems and gravity-fed systems, Armes, with its company Promag, also holds a special patent for production of the UPB storage systems: the dynamic system UPB (Under Pallet Base) takes its name from the bases, provided with special rollers, with which each load unit is provided. A pair of rails is positioned in each channel, sloping in the direction of the corridor, into which the stacker crane pushes (push-back system) the UPB bases, one after the other. When the stacker crane retrieves the first UPB of the channel (LIFO system), those behind drop down by gravity. The UPB system is particularly suitable for handling special types of load unit, as in the case of reels and coils which are difficult to manage with traditional systems. In the multi-depth systems the system supervision software plays a very important role, as it must be able to optimise storage and retrieval to avoid unnecessary movements due to internal shifting for rapid access to the required load unit.
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