Material or article handling – Apparatus particularly adapted for charging or discharging a... – Including one or more movable sites
Patent
1994-09-15
1998-01-13
Werner, Frank E.
Material or article handling
Apparatus particularly adapted for charging or discharging a...
Including one or more movable sites
414 286, 414 21, 414236, 414243, 414261, 414282, 414255, B65G 104
Patent
active
057071993
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to an apparatus for storing objects in a storage block, having identical storage places arranged behind--or next to--or above one another in the X, Y and Z directions, and at least one elevating member, assigned to the storage block, each storage place being equipped with a driving unit for displacing the objects in the Y direction and driving units being provided for displacing the objects in the X direction between the entrance area and the outward-transfer side of the storage block.
Such storage systems are known, for example, as high-bay warehouses, in which storage places arranged next to and above one another are provided on both sides of an aisle, which has the advantage that each individual position permits direct access. However, only as many positions as there are aisles can be served simultaneously.
Also known are sliding rack systems, which have only a very small space requirement since only a single aisle is required for access, while the other rack units are compressed to form an inaccessible block. This has the disadvantage, however, that very great masses have to be moved, resulting in a very long access time.
Dynamic rack systems have in comparison a very high loading and removal frequency, since access is possible over the entire end face. However, only similar articles can be stored in the individual rack compartments. Direct access to particular positions is not possible, because storage takes place on the principle of "first in--first out" or "last in--last out".
The subject of German Offenlegungsschrift 3,212,822 is a parking apparatus for motor vehicles which are parked on pallets and accommodated in storage places. The storage places are arranged in only one vertical slice, in which they are combined next to one another and above one another in the Y and Z directions to form a block. In front of this block there is located a laterally displaceable elevating member, with the aid of which the vehicle required in each case on the pallet is removed or can be put in place.
An apparatus of the generic type described at the beginning is known from German Patent 3,823,728. This is a multistory car park having at least two levels. In the case of this parking system, the storage places are arranged next to one another in the Y direction and behind one another in the X direction without intermediate spaces, thereby forming rows following successively in the X direction (reference to there as lines z) and lines lying next to one another in the Y direction (referred to there as rows r). In order to ensure the function of the parking system, at least one maneuvering place must be kept free in each line. When filling the multistory car park, the vehicles are driven in in such a way that a concentration in the direction of the drive-out row takes place, so that when the multistory car park is full the last row is free from vehicles. This free row is consequently to permit maneuvering movements when vehicles which are not in the forwardmost row are to be retrieved.
The known multistory car park operates substantially on the first in--first out principle. If--as explained--preferably the last of the rows lying transversely with respect to the main driving-through direction is kept free, this principle results in frequent maneuvering movements, in particular if there are significantly more lines than rows.
German Patent 3,823,728 does not provide any information on what happens with the empty pallets. From the description of the system it can be concluded that, once they become free, they are put back again at the empty storage places. In addition to this, an elevating member (lifting mechanism) is provided in every line, both in the entrance area and on the outward-transfer side. Furthermore, every storage place must be equipped with a plurality of lifting devices in the form of hydraulic cylinders, in order alternatively to raise into the working position the driving units for displacing the objects in the Y direction or the driving units for displacing the objects
REFERENCES:
patent: 3091188 (1963-05-01), Graham
patent: 3115257 (1963-12-01), Kubik
patent: 3217905 (1965-11-01), Frangos
patent: 3554389 (1971-01-01), Bright
patent: 3662905 (1972-05-01), Mizuno et al.
patent: 4768914 (1988-09-01), Sing
patent: 5176484 (1993-01-01), Kuperman et al.
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