| 摘要 |
The present invention relates to a locking unit for a fire door and, more specifically, to a locking unit for a fire door, which solves a problem in which a component is damaged due to heat in high temperature in fire or in which a locked state is released due to vibration and impact, by largely improving heat resistance and rigidity. According to the present invention, the locking unit for a fire door includes: a front plate (10) fixed to the upper part or the lower part of a side of the fire door and having a concave unit (11) formed of a metal material at the center to be concave towards the inner side in a plate shape with a fixed thickness, wherein a long hole (12) is cut in the vertical direction in the concave unit (11); a guide bracket (20) fixed to the rear side of the front plate (10), wherein a guide hole (21) is bored in the guide bracket (20); a fixing pin (40) ascending and descending to be locked and unlocked along the guide hole (21) of the guide bracket (20); a slider (50) located on the rear side of the concave unit (11) and connected to the fixing pin (40); a pushing pin (60) fixed to the slider (50) and exposed to the outside of the front plate (10) through the long hole (12) of the concave unit (11); and a position determining unit (70) controlling the slider (50) and the fixing pin (40) so that the slider (50) and the fixing pin (40) are individually fixed to a lock position and an unlock position by the selection of a user. |
