Roller shutter door anti-falling device

Abstract

The invention discloses a roller shutter door anti-falling device which is mainly used for preventing a roller shutter door from falling to hurt people and is simple in structure, capable of preventing the roller shutter door from falling in various states and safe and reliable in protection. The device is composed of a pair of stopping devices and a triggering device. The working principle is asfollows: when a door curtain of the roller shutter door ascends and stops, an electromagnet A and an electromagnet B of the pair of stopping devices are powered off at the same time, a spring extendselastically and drives a piston and a stop plate to move towards the inner surfaces of U-shaped bottom plates of the left door curtain sliding sleeve and the right door curtain sliding sleeve respectively and abut against the inner surfaces of the U-shaped bottom plates, and at the moment, no matter whether a chain wheel of a driving device of the door curtain is unhooked or broken or subjected toother abnormal conditions, the stopping devices can prevent the door curtains from falling; and when a door curtain of the roller shutter door descends, if the door curtain suddenly falls due to a certain reason, the triggering device triggers an electromagnetic switch to act, power supplies of the electromagnets A and B of the stopping devices are cut off, and a left stop plate and a right stopplate abut against the inner surfaces of the U-shaped bottom plates to prevent the door curtain from falling.

Description

technical field [0001] The invention is mainly used for preventing the rolling shutter door from falling down and injuring people. Background technique [0002] The anti-falling devices for rolling shutter doors that have been applied for or are in use have complicated structures and high maintenance and repair costs. Contents of the invention [0003] The present invention solves the above problems. It has a simple structure and can prevent the rolling door from falling under various conditions, and the protection is safe and reliable; it consists of a pair of stoppers (1) and a trigger device (8); a pair of stoppers (1 ) of the piston cylinder (2) are respectively fixed with the lower ends of the left and right sides of the bottom hinge (16) of the door curtain (15) of the rolling door; 2), electromagnet A (3), electromagnet B (4), spring (5), piston (6), stop plate (7), the left end of electromagnet A (3) and the piston cylinder (2) The bottom is fixed, the right end ...

AI Technical Summary

Problems solved by technology

[0002] The anti-drop devices for rolling shutter doors that have been applied for or are currently in use have relatively complicated structures and high maintenance costs.

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