| 摘要 |
In a storage and retrieval system of the type having a plurality of aisles in which an article handling load carrier operates and a transfer car for transferring the load carrier between the aisles for operation in several of the aisles, track extensions are pivotally mounted to the transfer vehicle and a plurality of camming and support surfaces are positioned adjacent the rails at the ends of the aisles. A camming surface is also positioned on the end of the track extensions opposite their pivotal attachment to the transfer vehicle and, as the transfer vehicle is moved between the respective aisles, the camming surfaces move into alignment with each other to position the supporting surfaces of the adjustable track extensions in continuous and substantially coplanar relationship with the rails on the transfer vehicle and in the individual aisles.
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