An elevator rope clamp for preventing accidental movement

Abstract

The invention discloses an accidental movement prevention wire holder for an elevator. The accidental movement prevention wire holder comprises a front splint and a rear splint for clamping a steel wire rope, wherein the front splint is fixed, the back part of the rear splint is connected with a slider and connecting rod reinforcement device, the slider and connecting rod reinforcement device is connected with a trigger spring for driving the rear splint to be close to the front splint for compressing and clamping the steel wire rope, the slider and connecting rod reinforcement device comprises a connecting rod hinged to the back part of the rear splint, the other end of the connecting rod is hinged to a slider, the slider slides along a vertical slider guide rail, the hinged point position of the connecting rod and the slider is always higher than the hinged point position of the connecting rod and the rear splint, the top of the slider is provided with a two-stage trigger spring comprising a large spring and a small spring for pressing the slider, and the bottom of the slider is provided with a trigger support which is triggered by an electromagnet and is used for positioning the slider. The two-stage spring is used for pushing the slider to downward move, and the connecting rod is used for pushing the splints for clamping the steel wire rope, so that the accidental movement prevention wire holder is simple in structure and reliable in clamping.

Description

technical field [0001] The invention belongs to the technical field of safety protection devices for elevators, and in particular relates to a rope clamp for preventing accidental movement of the car when the car door is not closed after the elevator stops. Background technique [0002] The elevator can be divided into eight major systems in terms of function: traction system, guidance system, car, door system, weight balance system, electric drive system, electrical control system, and safety protection system. The unexpected movement of the elevator car refers to the movement of the car with the door open without command in the unlocking area, and leaves the landing, excluding the movement caused by loading or unloading operations. In recent years, most of the elevator safety accidents at home and abroad are caused by the unexpected movement of the elevator car. The European standard EN81-1:1998+A3:2009 stipulates that the elevator should be equipped with a protective dev...

AI Technical Summary

Problems solved by technology

[0006] Chinese Patent No. CN103359576A discloses a reliable rope clamp, the wire rope clamping mechanism adopts the principle of wedge clamping and self-locking, so the rope clamp can only realize self-locking clamping in one direction, when the wire rope moves upward , under the action of wire rope friction, the wedge device loses its self-locking condition and cannot stop the wire rope

The rope gripper is controlled by a servo motor and can automatically reset, but the control is complicated, and the structure of the sprocket-belt transmission device is complicated and the reliability is poor

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