Asynchronous door knife device of elevator car door lock

Abstract

The invention discloses an asynchronous door knife device of an elevator car door lock. The asynchronous door knife device comprises a door knife back plate, a lock hook assembly, a knife arm connecting rod assembly, a door knife sliding block, a sliding block reset spring and a linkage unlocking assembly. The lock hook assembly comprises a fixed lock seat and a car door lock hook. The car door lock hook is rotationally connected to the door knife back plate; the knife arm connecting rod assembly comprises a left knife arm, a right knife arm, a door knife upper connecting rod and a door knifelower connecting rod. The left knife arm, the right knife arm, the door knife upper connecting rod and the door knife lower connecting rod are mutually hinged to form a parallelogram connecting rod mechanism; the door knife sliding block is slidably connected to the door knife back plate. The door knife sliding block slides between a first position and a second position relative to the door knifeback plate; the sliding block reset spring exerts acting force on the door knife sliding block to push the door knife sliding block to move from the second position to the first position. The device has the beneficial effect that the accidents that the car door cannot be opened and closed in an unlocking area due to the fact that the car door is jammed and cannot be closed in place are avoided.

Description

technical field [0001] The invention relates to an asynchronous door knife device for an elevator car door lock. Background technique [0002] As an important part of the elevator door machine device, the door knife has two forms, namely, asynchronous door knife and synchronous door knife. In the newly revised national standard, there are clear regulations on the opening of the car door. 1. If the elevator stops in the unlocking area for any reason, it should be possible to manually open the car door with a force of no more than 300N at the floor where the car is located and inside the car. 2. In order to limit the opening of the car door by the people in the car, the elevator stops in the non-unlocking area, and a force of 1000N is applied to the door opening restriction device, and the car door cannot be opened more than 50mm. Therefore, the elevator door should have an anti-pick function, and when the car is in the non-unlocking area, people in the car cannot open the ca...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the deficiencies of the prior art, the present invention provides an elevator car door lock asynchronous door knife device to solve the failure of the car door to be opened and the accident of closing the car in the unlocking area caused by the jamming of the landing door and the inability to close the door in place

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