Safety device for protecting from falling of canvas door

摘要

The present invention relates to a canvas door falling-preventing safety device. According to the present invention, a safety device (20) for blocking door lowering is configured in a lower truss (40) that is formed horizontally with spaces (12) of guide rails (10) (10a) where the multiple spaces (12) are formed on both sides by a partition (110) so as to support door elevation, a door blocking box (22) is formed to be inserted into a front insertion hole (21a) of a rectangular housing (21) of the safety device (20), the door blocking box (22) is connected to a wire (23), the wire (23) is wound around a winding drum (24), a gear (24a) that is formed on one side of the winding drum (24) is connected in engagement with a spur gear (25), the spur gear (25) is connected to a latch gear (26), the latch gear (26) is connected to a safety ring (27), an elastic spring (29) is mounted on a support rod (28) which is formed on both sides of the door blocking box (22), and the door blocking box (22) can move forward or backward to or from the space (12) of the guide rail (10) due to elasticity of the elastic spring (29).