PURPOSE: To improve stop precision by previously memorizing the learned address by learning the elevation by the detectors for the upper and lower-side detected plates on the shelf side and an elevation carriage and executing control in comparison with the calculated aimed stop value, in the captioned control for a solid shelf.

CONSTITUTION: An elevation carriage 8 is raised from the descent limit height where a detector 21 detects an original-point detected plate 19, until the detector 21 detects 1 lower-side detected plate 17 and an upper-side detected plate 18 of a detected plate 15. During this time, the pulses of a pulse encoder 13 is counted 14, and the value is registered as the learned absolute address value for the detected plate 15. Similar operation is carried-out for the ascent limit, and descent learning is executed and memorized. On the basis of these values, each stop aimed value for the lower-side stop height H1 and the upper-side stop height H2 is calculated for each level. On the basis of these results, stop control for the elevation carriage in the actual operation is performed. Thus, stop precision is improved.