| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire door device capable of keeping a door in an airtight state to an entrance by a simple structure. SOLUTION: A movable member 21 fixed to the upper end of the door and a connection member 20 fixed to the lower end of a hanger 2 are connected by a horizontal shaft 24 so as to move the movable member 21 in the thickness direction of the door, the connection member 20 is provided with a compression spring 23 for energizing the movable member 21 in one direction in the thickness direction of the door, and the movable member 21 is provided with a guide roller 30 supported by a vertical shaft 29. A guide rail is provided inside a box wrapping a hanging part by the hanger 2 and the guide roller 30 is abutted to the guide rail. A fitting hole to which the guide roller 30 is to be fitted in the state of closing the door is formed on the guide rail, and by fitting the guide roller 30 to the fitting hole, the upper end side of the door is drawn to the front surface side of an upper frame. COPYRIGHT: (C)2004,JPO
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