| 摘要 |
PURPOSE: An emergency releasing device of an automatic door is provided to move the rotating center of a rotating door to the central portion when the automatic door is opened in an emergency, thereby preventing the damage of a rotating shaft and the rotating door. CONSTITUTION: An emergency releasing device of an automatic door includes an upper rotating shaft and a lower rotating shaft, a rotation preventing hook, and a door frame stopper (23). The rotation preventing hook has one side fixed to a slide frame (21) and the other side hooked onto a rotation fixing groove formed in the rotating door, thereby rotating the rotating door only in one side direction. The door frame stopper is fixed to the automatic door frame, includes a stopper ball therein, and inserts the stopper ball into a stopper groove (232) formed in a slide frame, thereby preventing the slide frame from moving. |
