A rolling shutter door safety lock

Abstract

The invention discloses a roller shutter door safety lock. The roller shutter door safety lock comprises a wall, a channel penetrating in the front-rear direction is formed in the wall, safety devices are arranged in the inner walls of the left side and the right side of the channel, each safety device comprises through grooves which are symmetrically formed in the inner walls of the left side and the right side of the channel, and fixing blocks are fixedly connected to the inner walls of the sides, close to the symmetrical center, of the through grooves; and rotating cavities with openings deviating from the symmetrical center are formed in the fixing blocks, and connecting shafts are rotatably connected between the upper inner walls and the lower inner walls of the rotating cavities. The roller shutter door safety lock is easy to operate and convenient to use, the winding speed during retracting of a roller shutter door can be automatically limited, manual traction is avoided, personal safety is ensured, meanwhile, the winding speed is not limited when the roller shutter door is expanded, convenience and quickness are achieved, and the channel can be quickly closed.

Description

technical field

[0001] The invention relates to the field of locks, in particular to a safety lock for rolling shutter doors. Background technique

[0002] Generally, the doors of warehouses use rolling shutter doors. After unlocking the rolling shutter door lock, the rolling shutter door will automatically wind up. In order to prevent accidents from rolling up the rolling shutter door too fast, someone needs to pull the rolling shutter door to reduce the winding speed, but it is necessary to pull the rolling shutter door. There is a certain safety risk for people who have a certain safety risk. At present, there is no device that automatically controls the rolling speed of the rolling door. Therefore, it is necessary to design a safe safety lock for the rolling door that can automatically control the rolling speed of the rolling door. This device can Automatically reduce the speed of the rolling shutter door when it is rolled up, avoiding manual pulling and improving safety...

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