A chain breaking prevention device for fast doors

Abstract

The invention relates to a chain breaking-proof device for a fast door. The device comprises a fixed base, a steel wire rope, a pin shaft, an anti-falling hook and a torsion spring, wherein the fixed base is fixedly arranged on a door plank connecting plate; the door plank connecting plate is stridden on a guide rail; a door plank is connected with one end of the door plank connecting plate while a chain is connected with the other end of the door plank connecting plate; a pin shaft hole is formed at the upper end of the fixed base; the anti-falling hook is connected with the fixed base through the pin shaft, so that the chain breaking-proof device and a door body can be formed into a unified structure; the torsion spring sleeves the pin shaft; one end of the torsion spring is arranged on the fixed base; the anti-falling hook is arranged at the other end of the torsion spring; one end of the steel wire rope is fixed at the top of the anti-falling hook through a buckle and is pressed on the torsion spring; the other end of the steel wire rope is connected with the chain. The use safety of the fast door is enhanced; the operation safety of the user is guaranteed; the safety running function of the device is guaranteed; the human interaction safety is further realized; all the parts of the device are simply processed and easily assembled; the operability is high; the structure is stable; the application scope is wide; the chain breaking-proof device can be used for remolding the installed fast door.

Description

technical field [0001] The invention relates to a safety protection device for a fast door, in particular to a chain breaking prevention device for a fast door used to prevent a door panel from falling freely after a chain in a fast door transmission mechanism is broken. Background technique [0002] At present, in the application of fast doors, especially turbo hard fast doors (that is, aluminum alloy fast doors), there are generally non-uniform door sizes in the market, and there are large differences in personalized customization. The fast door products with different door types will have a certain impact and damage on the service life of the chain to a considerable extent under the condition of high-speed operation or long-term fatigue operation, and the chain is an important component of the transmission mechanism. Once a break occurs, especially during the operation of the door body, there is a considerable potential safety hazard, and in serious cases it will cause pe...

AI Technical Summary

Problems solved by technology

[0003] The patent for invention with the publication number CN 103104185B discloses an anti-broken chain braking device for a rolling door machine, which includes a support, a guide rod, a brake spring, a brake block, a rolling door driven sprocket with a braking round platform, and a tensioning wheel. , Tension spring and tension support, the brake block is pressed by the brake spring, so that it fits on the cylindrical surface of the brake round platform on the driven sprocket of the rolling door, and the friction resistance is generated to prevent the rolling door from falling, and the structure is complex , the applicability is relatively poor, and the rolling door cannot be stopped immediately, which is not conducive to the transformation of the existing installed rolling door

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