Friction dampers for reducing elevator car movement

Abstract

An exemplary device for use in an elevator system includes at least one friction member that is selectively moveable into a damping position in which the friction member is useful to damp movement of an elevator car associated with the device. A solenoid actuator has an armature that is situated for vertical movement. The armature moves upward when the solenoid is energized to move the friction member into the damping position. The armature mass urges the armature in a downward vertical direction causing the friction member to move out of the damping position when the solenoid is not energized.

Description

Background technique [0001] Elevator systems include machines for moving elevator cars to provide elevator service. In traction-based systems, the lanyard arrangement suspends the weight of the elevator car and counterweight. The traction between the lanyard arrangement and the traction sheave moved by the elevator machine provides the ability to move the elevator car as required. [0002] When the lift of the elevator system is large enough, the longer lanyard members create the possibility of the elevator car bouncing or bouncing due to changes in load when the elevator car is on the landing. In some instances, elevator passengers may experience a bouncing of the elevator car, which is undesirable. [0003] There are various known devices for keeping the elevator car fixed at the landing. Mechanical stops have been introduced into elevator systems to engage fixed structures in order to hold the elevator car rigidly in place. Braking devices that engage guide rails or oth...

AI Technical Summary

Problems solved by technology

However, such devices may require additional maintenance and repair when the brake or mechanical stop cannot be released from the locked position when necessary

Additionally, many of these devices produce noisy

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