| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire door capable of securing an evacuation route from the interior of a room even if the indoor pressure becomes high due to the emission of extinguisher gas. SOLUTION: This fire door 20 includes: doors 21 and 22 openably/closably provided in a passage 11 for communicating the inside and outside of a room R1 to which extinguisher gas is fed, wherein the doors 20 and 21 are defined as single doors each consisting of a first door member 51 and a second door member 52 rotationally connected to the first door member 51; and a compression spring 53 which energizes the second door member 52 against the rotational turning of the second door member 52, into the single door state with the first door member 51, wherein the energizing force of the compression spring 53 is adapted to be offset by the pressure in the interior of the room R1 when the extinguisher gas is fed into the room R1. COPYRIGHT: (C)2011,JPO&INPIT |
