WO2024070168A1

WO2024070168A1 - Elevator

Info

Publication number: WO2024070168A1
Application number: PCT/JP2023/027126
Authority: WO
Inventors: 智貴仮屋; 勝博島田; 基史遠藤; 康司伊藤
Original assignee: 株式会社日立製作所
Priority date: 2022-09-30
Filing date: 2023-07-25
Publication date: 2024-04-04

Abstract

This elevator includes a car that moves up and down through a hoistway, a suspended object connected to the car and suspended in the hoistway, and a swing suppressing member that suppresses swing of the suspended object. The swing suppressing member is located inside the suspended object and is more rigid in the horizontal direction than in the vertical direction.

Description

Elevator

The present invention relates to an elevator.

　In an elevator, a car and a counterweight placed inside the hoistway are connected by a main rope, and the car and the counterweight are raised and lowered in opposite directions by winding up the main rope with a hoist. When the car is located on the top floor and the bottom floor, the mass of the main rope applied to the car changes, and the mass balance between the car and the counterweight is lost. For this reason, a compensation chain is connected to the car and the counterweight to eliminate the aforementioned loss of mass balance. The compensation chain is a suspended object suspended inside the hoistway, and is also called a balancing cable. The compensation chain sways (oscillates) when the car is raised and lowered.

Patent Document 1 describes technology relating to "an elevator balancing cable anti-sway device for suppressing the swaying of a balancing cable that is connected between a car and a balancing weight and suspended within a hoistway, the elevator balancing cable anti-sway device being characterized by having a coil spring-shaped cable enclosing part that is arranged within the hoistway so as to surround the balancing cable."

JP 2004-224475 A

However, with the technology described in Patent Document 1, when installing a balancing cable anti-sway device in an elevator shaft, the balancing cable, which is heavy and difficult to handle, must be passed through a coil spring-shaped cable enclosure, and the cable enclosure must be fixed to the wall of the elevator shaft with a bracket. This makes the installation of the balancing cable anti-sway device difficult.

The object of the present invention is to provide a technology that allows easy installation of components to suppress the swaying of a suspended object.

In order to solve the above problems, for example, the configurations described in the claims are adopted.
The present application includes multiple means for solving the above-mentioned problems, but one example is an elevator comprising a car that moves up and down an elevator shaft, a suspended object connected to the car and suspended within the elevator shaft, and a vibration suppression member that suppresses the vibration of the suspended object, the vibration suppression member being positioned inside the suspended object and having a horizontal rigidity higher than its vertical rigidity.

According to the present invention, a member for suppressing the swing of a suspended object can be easily attached.
Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments.

FIG. 1 is a schematic diagram showing the configuration of an elevator according to an embodiment of the present invention. FIG. 4 is a perspective view showing an arrangement of a compensation chain and a vibration suppressing member. FIG. 13 is a schematic diagram illustrating the movement of the compensation chain when the car descends. 11 is a schematic diagram showing how a compensation chain contacts a rod in a comparative example. FIG. 1 is a schematic diagram illustrating the movement of the compensation chain when the car descends in an embodiment. FIG. 5 is a schematic diagram showing a state in which the compensation chain is in contact with a runout suppressing member in the embodiment. FIG.

Below, an embodiment of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same functions or configurations are given the same reference numerals, and duplicated descriptions will be omitted.

<Elevator configuration>
FIG. 1 is a schematic diagram showing the configuration of an elevator according to this embodiment.
As shown in FIG. 1, the elevator includes a car 1, a main rope 2, a counterweight 3, a car side pulley 4, a counterweight side pulley 5, a hoist 6, a diverting pulley 7, a tail cord 8, a compensation chain 10, and a vibration suppression member 11.

The car 1 ascends and descends in the elevator shaft 12, carrying passengers, baggage, etc. The car 1 has an upper frame 16 and a lower frame 18. The upper frame 16 is disposed at the top of the car 1, and the lower frame 18 is disposed at the bottom of the car 1. The car 1 is connected to the counterweight 3 by the main rope 2. One end of the main rope 2 is fixed to the first rope end 9a, and the other end of the main rope 2 is fixed to the second rope end 9b. Between the first rope end 9a and the second rope end 9b, the main rope 2 is wound around the car side pulley 4, the sheave of the hoist 6, the diverting pulley 7, and the counterweight side pulley 5, in that order.

The counterweight 3 is suspended within the elevator shaft 12. The counterweight 3 is a weight for balancing the mass with the car 1. When the car 1 rises and falls due to the drive of the hoist 6, the counterweight 3 rises and falls in the opposite direction to the car 1.

The cage side pulley 4 is attached to the upper frame 16 of the cage 1. The weight side pulley 5 is attached to the top of the counterweight 3. The hoist 6 and the diverting pulley 7 are attached to the beam 15.

The tail cord 8 is a cord for electrically connecting electronic devices (not shown) mounted in the car 1 to the control panel 13. The tail cord 8 is also called a control cable. The tail cord 8 is suspended in a U-shape within the elevator shaft 12. One end of the tail cord 8 is connected to the bottom frame 18 of the car 1. The other end of the tail cord 8 is connected to the control panel 13.

The compensation chain 10 is a chain for eliminating the mass imbalance caused by the main rope 2 between the car 1 and the counterweight 3. The compensation chain 10 is suspended in a U-shape within the elevator shaft 12 as an example of a suspended object. One end of the compensation chain 10 is connected to the bottom frame 18 of the car 1. The other end of the compensation chain 10 is connected to the bottom of the counterweight 3.

The sway suppression member 11 is a member for suppressing the sway (vibration) of the compensation chain 10. The sway suppression member 11 is positioned inside the compensation chain 10 that hangs down in a U-shape, and above the bottom of the compensation chain 10. The inside of the compensation chain 10 refers to a position between the chain portion 10a of the compensation chain 10 that hangs down from the car 1 and the chain portion 10b of the compensation chain 10 that hangs down from the counterweight 3, and horizontally spaced apart from each of the

chain portions

10a and 10b.

In this embodiment, as a preferred example, the vibration suppression member 11 is disposed at the center of amplitude 14 of the compensation chain 10. The center of amplitude 14 of the compensation chain 10 is the center position when the compensation chain 10 vibrates (sways) in the left-right direction in FIG. 1. When the compensation chain 10 is stationary as shown in FIG. 1, the lower part of the compensation chain 10 (the part hanging down in a U-shape) is disposed symmetrically with respect to the center of amplitude 14.

FIG. 2 is a perspective view showing an arrangement of the compensation chain and the vibration suppressing member.
In addition, in Figure 2, it is assumed that two compensation chains 10 are connected to one car 1, but the number of compensation chains 10 connected to the car 1 may be one or more.

As shown in FIG. 2, a rod 21 is suspended between a pair of guide rails 20. The pair of guide rails 20 are rails that are arranged vertically in the elevator shaft 12 to guide the upward and downward movement of the counterweight 3. A bracket 22 is fixed to each of the pair of guide rails 20. The bracket 22 is a plate-shaped member made of metal.

The rod 21 is a long rod with a rectangular cross section. The cross-sectional shape of the rod 21 may be a shape other than a rectangular shape, such as an inverted L-shape or a T-shape. The rod 21 is preferably made of a metal material such as steel. The rod 21 is arranged horizontally. Both ends of the rod 21 are fixed to a pair of guide rails 20 via corresponding brackets 22.

The vibration suppression member 11 is attached to the rod 21. Two vibration suppression members 11 are attached to one rod 21. However, the number of vibration suppression members 11 may be one or more. The vibration suppression member 11 is made of a rubber material. This rubber material is, for example, a synthetic rubber such as chloroprene rubber.

The vibration suppression member 11 is composed of a rectangular flat plate. The vibration suppression member 11 is arranged horizontally (parallel to the horizontal plane). Therefore, the vibration suppression member 11 has a higher rigidity in the horizontal direction than in the vertical direction. In other words, the vibration suppression member 11 is less likely to deform when subjected to a force in the horizontal direction (left-right direction in Figure 1), but is more likely to deform when subjected to a force in the vertical direction (up-down direction in Figure 1).

The vibration suppression member 11 is fixed to the upper surface of the rod 21 using, for example, a tie wrap band (not shown). In this case, the vibration suppression member 11 can be fixed to the rod 21 by passing a tie wrap band through a through hole provided in the vibration suppression member 11 and wrapping and tightening the tie wrap band around the vibration suppression member 11 and the rod 21. The method of fixing the vibration suppression member 11 is not limited to using a tie wrap band, and other methods such as screwing or adhesive bonding may also be used.

<Elevator operation>
Next, the operation of the elevator according to this embodiment will be described.
First, when the main rope 2 is wound up by the driving of the hoist 6, the car 1 and the counterweight 3 rise and fall in opposite directions. For example, when the car 1 is lowered from the state shown in FIG. 1, the counterweight 3 rises. At this time, as shown in FIG. 3, the compensation chain 10 has a chain portion 10a hanging down from the car 1 moving in the direction of the arrow D (downward), and a chain portion 10b hanging down from the counterweight 3 moving in the direction of the arrow U (upward). As a result, the compensation chain 10 swings left and right in FIG. 3 around the center of amplitude 14. The swing of the compensation chain 10 occurs when the car 1 and the counterweight 3 are moved (raised and lowered) in either the up or down direction. In addition, the movement direction of the compensation chain 10 when the car 1 is raised is opposite to the directions of the arrows D and U shown in FIG. 3. In addition, if the swing of the compensation chain 10 becomes large, the compensation chain 10 may hit the equipment in the hoistway 12 and cause the equipment to be damaged.

In this embodiment, therefore, a vibration suppression member 11 is placed in the elevator shaft 12, and this vibration suppression member 11 suppresses the vibration (vibration) of the compensation chain 10. The function of the vibration suppression member 11 will be described in detail below.

First, as a comparative example, in a configuration in which the vibration suppression member 11 is not attached to the rod 21 as shown in FIG. 4, when the compensation chain 10 sways left and right in FIG. 4 (leftward in the illustrated example), the compensation chain 10 comes into contact with the rod 21. This suppresses the vibration of the compensation chain 10.

At that time, the compensation chain 10 moves at high speed in the directions of the arrows U and D according to the lifting and lowering speed of the car 1 and the counterweight 3, while slowly swinging left and right. Therefore, when the compensation chain 10 comes into contact with the rod 21, the rod 21 is subjected to a vertical force due to the movement of the compensation chain 10 and a horizontal force due to the swinging of the compensation chain 10. In particular, when the compensation chain 10 comes into contact with the rod 21 while moving at high speed in the directions of the arrows U and D, a strong impact is applied to the rod 21, generating a loud collision sound. Such a collision sound also occurs when the compensation chain 10 comes into contact with the rod 21 while moving at high speed in the opposite direction to the arrows U and D.

In contrast, in this embodiment, as shown in FIG. 5, a sway suppression member 11 is attached to the rod 21. Therefore, as shown in FIG. 6, when the compensation chain 10 sways left and right (left in the illustrated example), the compensation chain 10 comes into contact with the sway suppression member 11. As described above, the sway suppression member 11 has a higher rigidity in the horizontal direction than in the vertical direction. Therefore, when a left-right force is applied to the sway suppression member 11 due to the swaying of the compensation chain 10, the sway suppression member 11 pushes back against the left-right force. As a result, the swaying of the compensation chain 10 is suppressed.

In addition, in this embodiment, when a vertical force is applied to the vibration suppression member 11 due to the movement of the compensation chain 10, the vibration suppression member 11 is deformed by the vertical force. Therefore, the impact applied to the vibration suppression member 11 due to contact with the compensation chain 10 is mitigated (absorbed) by the deformation of the vibration suppression member 11. Therefore, the generation of collision noise is suppressed. Furthermore, vibration of the rod 21 is suppressed compared to when the compensation chain 10 directly contacts the rod 21.

Effects of the embodiment
In the elevator according to this embodiment, the vibration suppression member 11 is disposed inside the compensation chain 10. Therefore, when the vibration suppression member 11 is attached inside the hoistway 12, interference between the compensation chain 10 and the vibration suppression member 11 can be avoided. Therefore, the vibration suppression member 11 can be easily attached. In addition, in this embodiment, the vibration suppression member 11 has a higher rigidity in the horizontal direction than in the vertical direction, so that the vibration of the compensation chain 10 can be suppressed while suppressing the generation of collision noise due to contact with the compensation chain 10.

In addition, in this embodiment, the vibration suppression member 11 is made of a rectangular flat plate. This allows the cost of the vibration suppression member 11 to be kept low.

Furthermore, in this embodiment, the vibration suppression member 11 is disposed at the center of amplitude 14 of the compensation chain 10. This makes it possible to effectively suppress the vibration of the compensation chain 10. Furthermore, the vibration suppression member 11 can be disposed at a position sufficiently distant from the

chain portions

10a and 10b of the compensation chain 10 in the vibration direction of the compensation chain 10 (the left-right direction in FIG. 5). Therefore, even if the vibration suppression member 11 is installed later, the installation work of the vibration suppression member 11 can be easily performed.

In addition, in this embodiment, the vibration suppression member 11 is attached to a rod 21 that is suspended between a pair of guide rails 20. This allows the vibration suppression member 11 to be installed in a stable state within the elevator shaft 12.

In addition, in this embodiment, the vibration suppression member 11 is made of rubber material. This makes it possible to reduce (absorb) the impact when the compensation chain 10 comes into contact with the vibration suppression member 11.

<Modifications, etc.>
The present invention is not limited to the above-described embodiment, but includes various modified examples. For example, in the above-described embodiment, the contents of the present invention are described in detail to make it easier to understand, but the present invention is not necessarily limited to having all the configurations described in the above-described embodiment. Also, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Also, it is possible to delete a part of the configuration of each embodiment, add another configuration, or replace it with another configuration.

For example, in the above embodiment, the vibration suppression member 11 is made of rubber material, but this is not limited thereto. For example, the vibration suppression member 11 may be made of a thin metal (such as stainless steel) plate.

In addition, in the above embodiment, the rod 21 is hung between a pair of guide rails 20, and the vibration suppression member 11 is attached to this rod 21, but this is not limited thereto. For example, a long flat plate may be hung between the pair of guide rails 20 as the vibration suppression member. Alternatively, a bracket may be attached to the lower part of the elevator shaft 12, and the vibration suppression member 11 may be attached to this bracket.

In the above embodiment, the compensation chain 10 is given as an example of a suspended object, but this is not limiting, and the suspended object may be a tail cord 8.

10...compensation chain (suspended object), 11...vibration suppression member, 12...hoistway, 14...oscillation center, 20...guide rail, 21...rod

Claims

A car that ascends and descends in the elevator,
A suspended object suspended within the elevator shaft in a state connected to the elevator car;
A vibration suppressing member that suppresses the vibration of the suspended object;
Equipped with
An elevator, wherein the vibration suppression member is arranged inside the suspended object and has a horizontal rigidity higher than a vertical rigidity.
The elevator according to claim 1 , wherein the vibration suppression member is formed of a rectangular flat plate.
The elevator according to claim 1 , wherein the vibration suppression member is disposed at the center of amplitude of the suspended object.
A pair of guide rails disposed in the elevator;
A rod stretched between the pair of guide rails;
Equipped with
The elevator according to claim 1 , wherein the vibration suppression member is attached to the rod.
The elevator according to claim 1, wherein the vibration suppression member is made of a rubber material.