| 摘要 |
PROBLEM TO BE SOLVED: To have a support mechanism sufficient in strength by liftably providing a vertically opening door connecting a plurality of panels between parking devices, and covering a part of a pit by the panel. SOLUTION: An intermediate door starts lowering from the state that a traverse can freely pass in a state that the intermediate door is opened. A roller 21a passes over the break 30a of a guide rail 30, when reaching a ground level L, further lowering is continued. The roller 20a is slipped out of the break 30a of the guide rail 30, and stopped by being supported on the stopper 40. In other words, the panels 21, 22 are overlapped in a two-folded state to close the opening part. The panels 21, 22 are supported on both the ends, and since they have a double structure, problem does not occur in strength. In other words, it is preferably a Folded structure. Thereby since a cover is automatically applied on the pit in Accordance with the opening and closing operation of the intermediate door, it is very safe.
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