Elevator stopping device

Abstract

The invention provides an elevator stopping device especially used for an elevator the car of which needs stopping safely in the working area of a well hole with a smaller free space. The elevator stopping device comprises a safety tong arranged on a lift car opposite to a guide rail, wherein the safety tong is connected with a speed limiter cable through a lifting rod, and a speed limiter is connected with a speed limiter tension pulley through the speed limiter cable. The elevator stopping device is characterized by further comprising a fixed seat arranged in the well hole and a progressive clamping device arranged on the fixed seat for acting on the speed limiter cable. With the advantages of flexible installation position, convenient operation, safety and reliability, simple structure and lower cost, the elevator stopping device can be installed at the top, the middle or the bottom of the well hole and can ensure the safety of inspection and maintenance personnel at any working area of well hole pits, car tops, well hole platforms and well hole tops.

Description

【Technical field】 [0001] The invention relates to the field of elevators, in particular to an elevator safety braking device that requires relatively small free space in the hoistway pit, car top, platform in the hoistway, and hoistway top working area for safely stopping the car. 【Background technique】 [0002] Existing elevators, especially machine-room-less elevators, have many components placed in the shaft. When inspection and maintenance personnel inspect and maintain equipment in the pit of the shaft, the top of the car, the platform in the shaft, and the working area on the top of the shaft, additional safety devices need to be installed. In order to leave enough safe space in the working area to ensure the safety of inspection and maintenance personnel; in order to achieve this goal in the pit of the hoistway and the top of the hoistway, Chinese patent 200480044089.6 discloses a "device for the safe stop of the elevator car" The device comprises at least one box mou...

AI Technical Summary

Problems solved by technology

The device installs olive-shaped fittings on the wire rope of the speed governor. In order to ensure that the olive-shaped fittings do not affect the speed governor when the elevator runs throughout the hoistway, the olive-shaped fittings can only be installed at the joint position between the speed follower cable and the car. The upper and lower lengths are limited, and the fork can only be installed near the position where the car needs to be stopped; in order to ensure that when the olive-shaped fitting is combined with the fork, the cable of the speed limiting device will be tensioned and the car safety gear will be activated through the lifting rod. The olive-shaped fittings and forks can only be installed in the direction to prevent the car from running (that is, to check the position of the maintenance personnel relative to the car), and the convenience of operation and the scope of application of the device are very limited.

For example, if the elevator equipment in the middle of the hoistway is checked on the top of the car, the fork can only be installed in the middle of the hoistway, and the olive-shaped fittings and forks can only be installed in the lower part of the car. The device cannot be operated and inspected on the top, and when the inspector maintains at any position, the fork must move together, the operation is complicated, and safety accidents are likely to occur; location restricted

The installation strength of the olive-shaped fittings of the device and the speed governor cable is difficult to guarantee, and may also affect the strength of the speed governor cable; the structure of the fork is complicated, difficult to manufacture, and high in cost. The strength is difficult to ensure sufficient pulling force; because the car’s braking distance is difficult to ensure accurately, when the car’s braking distance is large and the stroke of the buffer device of the fork is not enough, the car’s braking will make the fork parts, speed governor cable, speed governor, car and speed governor cable joints cause serious damage, safety and reliability are difficult to guarantee

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