To provide a fire door for easily closing the door by reducing a pressure applied to a door surface in the stage of closing the door when pressuring an attached room and preventing smoke to eliminate the need of force for opening the door daily as well.
For the door 3, door parts 3A and 3B divided in the lateral direction are connected with each other by a hinge, and a door opening/closing mechanism 10 linked with a handle 4 of a second door part 3B is provided. The door opening/closing mechanism 10 includes a door connecting bar 11 capable of connecting the door parts 3A and 3B with each other in linkage with the opening/closing operation of the handle 4, and a second door locking bar 14 capable of locking the first door part 3A connected to a door frame 2 to the door frame 2 in linkage with the door connecting bar 11. When the opening operation of the handle 4 is performed, the door parts 3A and 3B are connected with each other by the door connecting bar 11, and the fixation of the first door part 3A and the door frame 2 is released by the second door locking bar 14. When the closing operation of the handle 4 is performed, the door parts 3A and 3B are disconnected from each other by the door connecting bar 11, and the first door part 3A is fixed to the door frame 2 at a locking hole 21 by the second door locking bar 14.
COPYRIGHT: (C)2011,JPO&INPIT
| JP2002168060A | ||||
| JP2005314971A | ||||
| JP2003120141A |
Tadashi Takahashi
Takashi Watanabe
Yoshifumi Saeki