Dual mast arrangement for storage and retrieval vehicles.

摘要

A dual mast storage and retrieval vehicle (10) comprising structure which maintains each mast (80, 80') essentially vertical as variably weighted heavy loads are placed on a carriage (50) disposed between the masts. Each mast is disposed near the center of a separately supported base (90, 90') such that bending of the base under such loads induces little off-vertical deflection to the mast. The separately supported bases are coupled by a connector (600) which comprises cross-aisle and vertical degrees of freedom but is strictly constrained in the down-aisle direction.