| 摘要 |
PURPOSE: An automatic shutting device for a fire door is provided to rapidly shut a fire door by using a drive motor in fire and to control the closing state of a fire door by using a stopper member. CONSTITUTION: An automatic shutting device for a fire door comprises a main body(10), a drive motor(20), a housing(30), a guide(37), a driving gear(40), and an assembly structure(41), and a stopper device(50). The main body is attached to the upper of the fire door in the form of a box. One side of an arm of a door closer is located close to the lower part of the main body. The drive motor is driven with an electric signal in the inside of the main body. The housing is connected to the drive motor and actuates according to the drive of the drive motor. The guide guides the housing. The driving gear is separated at the leading end of the housing and has a plurality of gear teeth at the outer circumference. The assembly structure is fixed to the driving gear and is combined with the arm of the door close. |
