Patent ID: 7261210

Claim:
A shelving system comprising a plurality of movable shelves installed for back-and-forth movement on a travel path through a travel supporting device thereby to handle articles with respect to the movable shelves opposed to a working aisle by using the working aisle opened between the movable shelves, wherein the system further comprises: at least two movement detecting means for detecting a moved distance in a travel direction and a moved distance in a right-and-left direction for every unit time, said means being provided in the right-and-left direction at right angles to the travel direction along the travel path of each movable shelf; and control means for finding absolute coordinates of each movement detecting means from the moved distance in the travel direction and the moved distance in the right-and-left direction each detected by each movement detecting means, correcting a deviation in the right-and-left direction from the travel path of the movable shelves involved in the traveling of the movable shelf or the deviation in the travel direction of the movable shelf based on the absolute coordinates, and correcting an attitude of the movable shelf in a direction at right angles to the travel direction or in the travel direction.