Friction blocking rolling door falling prevention device

Abstract

The invention discloses a friction blocking rolling door falling prevention device. The friction blocking rolling door falling prevention device is mainly used for preventing a rolling door from falling and hurting people, is simple in structure and can prevent the rolling door from falling in multiple states, and protection is safe and reliable. The friction blocking rolling door falling prevention device is composed of a pair of blocking devices and a triggering device; according to the operating principle of the friction blocking rolling door falling prevention device, when a door curtain of the rolling door rises and stops, an electromagnet A and an electromagnet B of the blocking devices are synchronously powered off, a spring A and a spring B spring back, elongate and drive the leftand right ends of rhombic connection rods to elongate, and a pair of blocking plates abut against the inner faces of the side walls of door curtain sliding sleeves respectively to prevent the door curtain from falling suddenly; when the door curtain of the rolling door descends, if the door curtain falls suddenly due to a certain reason, the triggering device triggers an electromagnetic switch tooperate to cut off power supplies of the electromagnet A and the electromagnet B of the blocking devices, and the left and right blocking plates abut against the inner surfaces of the side walls of the door curtain sliding sleeves respectively 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 ) shell (2) is respectively fixed with the left and right sides of the bottom loose-leaf (16) of the door curtain (15) of the rolling door; Iron A (3), electromagnet B (4), spring A (5), spring B (6), stop plate (7), rhombus connecting rod (25) are formed, the upper end of spring A (5) and shell ( 2) is fixed on the upper inner wall, the lower end of the...

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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