| 摘要 |
PROBLEM TO BE SOLVED: To provide a door device which is equipped with a harm prevention mechanism and a smoke shielding function. SOLUTION: A door body 2, which is positioned on a downside when an opening is fully closed, is equipped with a movable portion 20 which is supported in a vertically movable manner via a buffer means 15; an opening frame is provided with a pushing means 16 for pushing the door bodies to the side of a lateral airtight member 801 when the door bodies 1 and 2 are moved downward from a normal totally enclosed state; and swelling portions 3B, 4A and 4B, which swell in a pushing direction in the state of being positioned directly below guide members 5A, 5B, 6A and 6B in the normal totally enclosed state, are formed on guide rails 3 and 4, respectively. When lowered by self-weight, the door bodies 1 and 2 are further lowered by a predetermined amount from the normal totally enclosed state by the upward movement of the movable portion 20; and concurrently with that, the door bodies 1 and 2 are pushed by the pushing means 16, so that faces of the door bodies 1 and 2 can be brought into pressure contact with the lateral airtight member 801. COPYRIGHT: (C)2010,JPO&INPIT
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