| 摘要 |
PROBLEM TO BE SOLVED: To provide a door opening closing apparatus which prevents fall of doors when lowering the doors (when closing the doors), to thereby achieve a stable door closing operation. SOLUTION: The door opening/closing apparatus is formed of the plurality of doors arranged in an opening side by side in the vertical direction, guide rails arranged on both right and left sides of the opening, for vertically guiding the doors 2 while maintaining the doors in a drooping state, a lifting means for vertically lifting/lowering the doors in the drooping state along the guide rails 3, a rotating means for rotatively opening the doors which have reached an upper portion of the opening by the lifting operation of the lifting means, in a manner protruding the doors frontward in sequence beginning from the upper one, and a fall preventive means 28 operable when the doors are lowered, for lowering the doors in sequence beginning from the lower one while securing an interval between the doors, and preventing the doors 2 from falling. COPYRIGHT: (C)2004,JPO
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