| 摘要 |
PROBLEM TO BE SOLVED: To suppress a malfunction in a microswitch for detecting a state of a locking device for a fire door.SOLUTION: A locking device for a fire door, which locks a hook (hook pin 602) attached to the fire door, includes: a latch member (latch plate 130) for locking the hook; a cover plate 121 for covering the latch member; a detection part (microswitch 561) that is arranged on the opposite side of the latch member with respect to the cover plate to detect that the latch member is in a hook-locked state or a hook-unlocked state; and a solenoid 230 for releasing the state of locking the hook by the latch member.SELECTED DRAWING: Figure 2 |
