Safety unlocking device of manual landing door of simple elevator

Abstract

The invention discloses a safety unlocking device of a manual landing door of a simple elevator. The safety unlocking device is characterized in that when a transverse traction resetting mechanism is pulled from the outer side of the manual landing door, a wheel collides with a car impact rod after a traction plate translates a certain distance under the condition that a car stays on the floor, and when the traction plate further translates, an unlocking pull rod rotates clockwise under the action of the wheel and the car impact rod, an unlocking pull wire pulls a movable hook of a landing door lock to rotate to be separated from a fixed hook, so that the landing door lock is unlocked and the landing door is opened. When the car does not reach the floor, the traction plate drives the unlocking pull rod to transversely move, the wheel keeps no contact with the car impact rod, the unlocking pull wire drives the movable hook of the landing door lock to rotate by a small angle, the movable hook of the landing door lock fails to be separated from the fixed hook of the landing door lock, the landing door lock is not unlocked and the landing door is not opened, so that accidents are prevented. Besides, the safety unlocking device is simple in structure, low in manufacturing cost, low in mounting accuracy requirements, and convenient to be modified on the landing door lock of the simple elevator.

Description

technical field [0001] The invention relates to an unlocking device for a landing door of an elevator, in particular to a safety unlocking device for a simple manual landing door of an elevator. Background technique [0002] The simple elevator is driven by traction machine, winch, electric hoist, hydraulic pump station, etc., and the cargo compartment is driven by steel wire rope, gear rack, chain or hydraulic cylinder, and the vertical or vertical inclination angle is less than 15° rigid guides run only for lifting machinery carrying goods. This type of product has a simple structure, low technical requirements, low requirements on buildings, and relatively low prices, so it has been widely used in enterprises, especially small and medium-sized enterprises. [0003] In order to prevent users and other personnel from falling down the hoistway or being cut by the simple elevator, the simple elevator is equipped with landing doors and cargo compartment doors to ensure the sa...

AI Technical Summary

Problems solved by technology

[0004] However, the manual landing door lock products produced before the implementation of the standard do not meet the requirements of the current standard, and there is a large safety risk. According to the accident investigation and analysis results, the defect of the landing door lock is one of the main reasons for the safety accident.

The manual landing door locks currently in use generally have the problems of high failure rate and poor reliability, and urgently need to be improved

On the other hand, some manufacturers do not have a thorough understanding of the new requirements of the standard, resulting in their products not meeting the requirements of the new standard

[0005] An existing solution is to use a solenoid valve or a linear motor as the unlocking device, but there are problems such as high cost, high installation accuracy requirements, and inconvenient modification of a simple elevator in use.

Images