Storage And Retrieval System

The automatic storage and retrieval system 10 includes means defining a plurality of storage or staging locations 66 (FIG

. 1). While various storage location defining means can be employed, in the illustrated embodiment such means includes a modular storage rack 70. The storage rack 70 is made of modules 74. Each module 74 includes a frame 78, seven vertically spaced shelves 82, and cantilever supports 86 which are supported by the frame 78 and which support the shelves 82. As explained in the aforementioned patent application, the storage rack is mounted on top of a sweep rack which includes three levels of conveyors and which, for the purposes of this application, can be considered to be an integral part of the storage rack 70. Each shelf 82 has a continuous upwardly facing horizontal surface that defines a number of horizontally spaced storage locations 66. Use of the cantilever supports 86 allows the shelves 82 to be supported such that there are no partitions between adjacent storage locations 66. Thus, the storage rack 70 defines seven levels of storage locations, and a plurality of bays of storage locations, with each bay including seven vertically aligned storage locations.

To move the automatic storage and retrieval system machine 90 horizontally, means are provided for moving the base 92 along the rail member 88a. While various moving means can be employed, in the illustrated arrangement such means includes a drive mechanism 103. As shown in FIG. 2, the drive mechanism 103 includes drive and idler wheels or sprockets 103a and 103b, respectively, supported adjacent opposite ends of the rail member 88a, and a toothed belt 103c trained around the sprockets 103a and 103b and connected (FIG. 13) at its opposite ends to the opposite ends of the base 92 by a bolt or screw. The belt 103c is preferably a POLY CHAIN GT belt manufactured by Gates. A stationary motor 103d is drivingly connected to the drive sprocket 103a via a gear reducer to pull the automatic storage and retrieval system machine back and forth along the rail member 88a.

The automatic storage and retrieval system machine also includes a generally vertical mast on the base, and a carriage supported on the mast by additional linear slides that slide along one or more rods extending vertically along the mast. The automatic storage and retrieval system machine is provided with an onboard motor to move the carriage up and down the mast. An extendable and retractable shuttle or extractor mechanism is provided on the carriage and is operable to move objects on and off the carriage.

by: ericfu

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