| 摘要 |
PROBLEM TO BE SOLVED: To easily change and finely adjust the width of a space between multiple movable shelves. SOLUTION: In a space formation mode, movable shelves 12, 13, 14 are scattered along a rail 11, and a space having a width W4 is formed in front of the receiving surface of each of the movable shelves 12, 13, 14. In a learning mode, the movable shelves 12, 13, 14 start converging on the side of the main control shelves 15. A required period of every one of the movable shelves 12,13,14 from the start to the completion of the convergence of the movable shelves 12, 13, 14 is memorized in control parts 12c, 13c, 14c. In a reproducing mode, after all the movable shelves 12, 13, 14 converge on the side of the main control shelves 15, the respective movable shelves 12, 13, 14 move along the rail 11 based on the required period of every one of the respective movable shelves 12, 13, 14 memorized in the learning mode, and the space having the width W4 is reproduced in front of the receiving surface of each of the movable shelves 12, 13, 14.
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