| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanical parking device free of interference and unnecessary troubles at electrical contact parts, even if a storage space having a current collector on a circuit for circulating and moving through a plurality of trays has been formed.SOLUTION: A mobile current collector device having a floor-side current collector 17 and capable of switching between and being held at two locations on the floor side of a storage space is configured. The mobile current collector device is switched to one of the positions in a stand-by state and held at a low position, and is switched to the other position when a tray 1 is at a halt on the top, and is held while establishing an electrical contact between the floor-side current collector 17 and a tray-side current collector 7 by increasing the height. |
