| 摘要 |
PROBLEM TO BE SOLVED: To prevent dust on the top of a door body 1 from falling on and sticking to a man and an object when the man and the object open and close a door to pass therethrough. SOLUTION: The shape of the top of the door body 1 is configured not to be a horizontal section but a slanted section thereby restraining the dust drifting in the air from accumulating. By reducing the dust on the top of the door with the aid of movement of the door at the time of opening and closing the door through which the man and the object pass, the dust is prevented from falling on and sticking to the man and the object that pass through the door body 1. COPYRIGHT: (C)2011,JPO&INPIT
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