Elevator vibration damping apparatus

Abstract

The invention disclose an elevator oscillation decreasing apparatus comprises a housing disposed onto an oscillation decreasing object, a hammer for supporting at least part of the magnetic body in the housing, and an elastomer making the hammer freely changing position in the oscillation decreasing direction; an electromagnet disposed opposite to the hammer in the housing; a control device for generating electromagnetic force of the electromagnet relative to the magnetic body which drives the hammer moves in the oscillation decreasing direction, so as to apply an oscillation decreasing forceto the oscillation decreasing object through the housing. Elastic coefficient of the elastomer in the oscillation decreasing direction is smaller than that in the direction perpendicular to the oscillation decreasing direction.

Description

technical field [0001] The invention relates to an elevator vibration damping device for reducing elevator vibration. Background technique [0002] In recent years, as buildings have become more space-saving, machine-room-less elevators in which hoists have been miniaturized and installed in hoistways have become popular. In the machine-room-less elevator, a traction machine is driven in an elevator shaft, and a car (cage) moves up and down via a cable wound around a sheave of the traction machine. At this time, the vibration of the hoist is transmitted to the building side through beams and the like. In particular, the diameter of the cable tends to become thinner as the strength of the cable increases, and the diameter of the sheave decreases accordingly, so that vibrations above about 10 Hz are generated due to the high-speed rotation of the sheave. This vibration affects walls and the like of residents in the building to generate noise. In this context, a technical so...

AI Technical Summary

Problems solved by technology

However, in the existing vibration damping device, since the weight is only supported by the elastic body, when a vibration having a component in a direction (for example, a left-right direction) perpendicular to the vibration damping direction is applied, the weight moves in a direction perpendicular to the vibration damping direction. Displacement, so the vibration damping force may not be effectively transmitted to the supporting part

And when the amount of displacement is large, there is a possibility that the weight may be damaged due to contact with the inner wall of the housing.

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