JPH08119558A - Tail cord damping device for elevator - Google Patents

Abstract

PURPOSE: To absorb the vibration in the out-of-plane direction of a tail cord of an elevator where the position of a holding part of the tail cord can be easily adjusted by providing a tail cord suspension piece on the tower side of the elevator to the upper part of a tail cord vibration damping device separately from the tail cord vibration damping device. CONSTITUTION: A tail cord 4 is oscillated in the out-of-plane direction of the tail cord with a lower part of a car 1 and a suspension piece 3 as the supporting points at the time of strong wind or earthquake. A tail cord holding part 11 of a tail cord vibration damping device 5 is oscillated along a guide rail 10 by the oscillation in the out-of-plane direction of the tail cord 4. A guide device 17 is similarly oscillated by oscillating the tail cord holding part 11. A spring 13a on one side between the tail cord holding part 11 and a spring washer 15 is compressed, and a spring 13b on the other side is elongated. Due to the compression and elongation of the springs 12a, 13b, the friction is generated between the spring 13a, 13b and a rod 16. The oscillation of the tail cord 4 is damped by the friction force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration suppression device for a tail cord of an elevator which is suspended by the elevator from the tower side to the car side and hangs down by its own weight.

[0002]

2. Description of the Related Art As a conventional technique relating to a tail cord damping device for an elevator, there is one disclosed in Japanese Patent Laid-Open No. 2-33078. This technique is also effective enough to suppress the vibration of the tail cord.

However, in this technique, the weight of the tail cord on the hoistway side is entirely received by the tail cord holding portion on the guide rail of the device, so that the device becomes very large in order to provide strength, and the device is installed in the hoistway. Was difficult.

Further, since the weight of the tail cord on the lifting tower side is entirely received by the tail cord holding portion, a large horizontal component force is generated in the tail cord holding portion even if the rail is slightly misaligned. It was very difficult to adjust the levelness of the guide rail to install the holding part in the center of the guide rail.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the size of the device, to facilitate installation in the hoistway, and to adjust the position of the holding portion of the tail cord easily. It is an object of the present invention to provide a tail cord vibration damping device for an elevator, which absorbs the swing of the.

[0006]

In the present invention, the tail cord suspension fitting on the tower side of the elevator is provided above the tail cord damping device, separately from the tail cord damping device.

A frame of a device in which a tail cord holder and a guide of a tail cord damping device, which is wider than the cross section of the tail cord so that the weight of the tail cord is not applied, is fixed by a bracket from the car side guide rail in the direction outside the tail cord surface. It was installed on the guide rail installed in.

The tail cord holder and the guide are located at the center of the guide rail, and springs are provided outside the tail cord on both sides of the guide and the tail cord holder. The other end of the spring is installed on the device frame. Fixed to the spring seat.

A rod is provided in the spring and is fixed to a spring seat installed on the apparatus frame.

[0010]

According to the present invention, the tail cord, which is suspended over the car side and the tower side of the elevator and hangs down by its own weight, causes the out-of-plane swing of the tail cord between the guide and the guide rail in the tail cord damping device. The friction that occurs between the spring and the rod and the damping that damps the swing of the tail cord,
The swing of the tail cord can be suppressed.

Since the tail cord vibration damping device does not receive the weight of the tail cord itself, it does not require a strength member and can be made very small and lightweight, so that it can be mounted on the car side guide rail.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows the mounting position of the tail cord vibration damping device. 1 is a car, 2 is a car side guide rail, and 3 is a car guide rail.
Is a tail cord suspension fitting, 4 is a tail cord, 5 is a tail cord damping device, 6 is a connection box, and 7 is a cable.

FIG. 2 is a front view of the tail cord damping device, and FIG. 3 is a sectional view taken along line I--I of FIG. 10 is a guide rail, 11
Is a tail cord holder, 12 is a tail cord, 13a,
13b is a spring, 14 is a frame, 15 is a spring seat, 16 is a rod,
Reference numeral 17 is a guide that slides on the guide rail 10.

When the wind is strong or an earthquake occurs, the tail cord 4 is the car 1
And the tail cord suspension metal fitting 3 is used as a fulcrum to swing the tail cord out of the plane.

By swinging the tail cord 4 in the out-of-plane direction,
The tail cord holder 11 of the tail cord vibration damping device 5 is
It swings along the guide rail 10.

When the tail cord holder 11 swings, the guide device 17 also swings.

When the tail cord holding portion 11 swings, the spring 13a on one side between the tail cord holding portion 11 and the spring seat 15 is compressed and the spring 13b on the other side extends. As the springs 13a and 13b compress and extend, friction is generated between the springs 13a and 13b and the rod 16.

Separately from this, the guide 17 and the guide rail 10 are provided.
Friction also occurs between them.

The swinging of the tail cord 4 is damped by the frictional force generated between the springs 13a and 13b and the rod 16 and between the guide device and the guide rail 10 to suppress the swinging of the tail cord. You can

When the tail cord is not swinging, the restoring force of the springs 13a and 13b causes the tail cord holding portion 1 to move.
1 stops at the center of the guide rail 10.

In the tail cord damping device of the present invention, since the tail cord suspending member 3 is arranged above the tail cord damping device 5, the weight of the tail cord 4 is not applied to the tail cord holding portion 11. Therefore, the tail cord vibration damping device 5 does not need a member for increasing the strength, and the device can be made extremely small.
Since it is held by 3b, it is possible to adjust the position of the tail cord holding portion even if the level of the guide rail 10 is slightly misaligned.

Further, since the tail cord damping device 5 is small and the weight of the tail cord 4 is not applied, it can be mounted on the car side guide rail 2 by the brackets 8a, 8b, 8c, and the installation work can be easily carried out.

[0024]

According to the present invention, even if the tail cord swings in the out-of-plane direction at the time of earthquake or strength, the swing of the tail cord can be suppressed. Since the weight of the tail cord is not applied, the tail cord vibration damping device can be downsized and can be attached to the car side guide rail, so that the installation work can be easily performed.

The position of the tail cord holding portion can be easily adjusted because the weight of the tail cord is not applied to the tail cord holding portion.

[Brief description of drawings]

FIG. 1 is an explanatory view of a mounting position of a tail cord vibration damping device.

FIG. 2 is a front view of a tail cord damping device.

FIG. 3 is a sectional view taken along the line I-I of FIG.

[Explanation of symbols]

10 ... Guide rail, 11 ... Tail cord holder, 12 ...
Tail cord, 13a, 13b ... Spring, 14 ... Frame, 15
… Spring seat, 16… Rod, 17… Guide.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Kasai 502 Jinritsucho, Tsuchiura City, Ibaraki Prefecture

Claims (2)

[Claims] 1. A vibration damping device for the tail cord of the elevator, wherein the tail cord damping device for absorbing out-of-plane swing of a tail cord that is suspended over a car side and a tower side of the elevator and hangs down by its own weight. A guide cord is provided in the direction, and a tail cord damping device including a guide that can move along the guide rail and a tail cord holding part that is connected to the guide, and its own weight is supported above the tail cord damping device. A tail cord damping device for an elevator, comprising: a tail cord, a tail cord, and the tail cord holding portion loosely coupled in a vertical direction. 2. The damping device for the tail cord of an elevator according to claim 1, wherein the tail cord damping device can be attached to the car-side guide rail.