| 摘要 |
A safety stop device (1), for fire barrier doors, comprising suction cup means (8) associated with a fire barrier door (9) and cooperating with a wall (7)associated with a fixed body, said suction cup means forming a negative pressure chamber (10) with said wall which comprises an outlet hole coupled to a valve (11) controlled by a valve electromagnet (3) thereby, as electric power is switched on, said electromagnet restrains said valve thereby closing a communication between the negative pressure chamber and outside environment, whereas, as electric power is switched off, said electromagnet releases said valve thereby communicating said negative pressure chamber with the outside environment, while disengaging the suction cup means from the fixed body. |
