Braking device for a car of a lift system

Abstract

The invention relates to a braking device (14) for a car (200) of a lift system (100), wherein the braking device (14) comprises a first brake pad (16) and a second brake pad (18), which are arrangedopposite one another and accommodate the guide rail (110) between them and deploy a braking effect via a frictional connection when they engage with the guide rail (110). For this purpose, the first brake pad (16) is wedge-shaped and tapers in the direction of a wedge direction (20), wherein the front side of the brake pad facing the guide rail (110) is oriented in parallel to the guide rail (110)and the opposing rear side is inclined according to the wedge shape. In addition, the braking device (14) comprises a brake pad receiving means (22) having a contact surface (24) with an inclinationcorresponding to the wedge-shaped brake pad (16), on which the rear side of the wedge-shaped brake pad (16) rests in a sliding manner. Furthermore, the braking device (14) has a locking device (36) with a first position and a second position, wherein the locking device (36) releases a sliding movement of the wedge-shaped first brake pad (16) against the wedge direction (20) in the first position,and blocks the sliding movement of the wedge-shaped brake pad (16) against the wedge direction (20) in the second position.

Description

Technical field [0001] The present invention relates to a braking device for a car of a lifting system. The car can move up and down in a vertical hoistway, the car moves along one or more vertical guide rails, and the braking device includes two opposite Arranged brake pads, the two brake pads accommodate the guide rail between them, and when the brake pads are engaged with the guide rail, a braking effect is produced due to friction locking. Background technique [0002] Such a braking device is disclosed in WO 2015 / 144686A1. In this case, the braking device is designed to move along the vertical hoistway. In order for such a braking device to ensure the highest possible degree of safety, the control of the lifting system is usually designed so that the brake is triggered in any dangerous situation to stop the car as quickly as possible. This also happens especially when the power supply of the lifting system fails completely. This is why the braking device is designed in an ...

AI Technical Summary

Problems solved by technology

[0003] However, such emergency braking must prevent a possible collision when the car is moving downwards, which does not apply when the car is moving upwards

In this case, since the drive is switched off, the car is already at a standstill, making it not only unnecessary, but also a risk of injury since the passenger's head would hit the ceiling of the car if the upward movement were suddenly blocked, and there would be a risk of injury. And even actively braking upward movement should be avoided for safety reasons

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