JP-7854961-B2 - Method for replacing elevator pulleys and temporary support device for suspension system

JP7854961B2JP 7854961 B2JP7854961 B2JP 7854961B2JP-7854961-B2

Inventors

本村晃一
高橋良直

Assignees

三菱電機ビルソリューションズ株式会社

Dates

Publication Date: 20260507
Application Date: 20230509

Claims (8)

A step of installing a temporary suspension support device, which has a pair of temporary support members and jacking devices for moving each of the pair of temporary support members, on a pulley mounting member to which an existing pulley is attached, A method for replacing an elevator pulley, comprising the steps of: moving the pair of temporary support members relative to the existing pulley while the pair of temporary support members are in contact with the suspension body, and placing the suspension body on the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the existing pulley with the suspension body temporary support device; and removing the existing pulley from the pulley mounting member and attaching a new pulley to the pulley mounting member.
The jacking device is installed on a pulley mounting member to which a pulley is attached, and the jacking device is equipped with a pair of temporary support members. The jacking device, when operated while installed on the pulley mounting member, moves the pair of temporary support members relative to the pulley, and shifts the suspension body that was on the pulley to the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the pulley . An elevator suspension temporary support device in which at least the portion of the outer surface of each temporary support member that is in contact with the suspension body is curved .
The temporary support device for an elevator suspension according to claim 2 , wherein the radius of curvature of the curved surface is smaller than the radius of curvature of the pulley.
A jacking device installed on a pulley mounting member to which a pulley is attached, and A pair of temporary support members attached to the jacking device. Equipped with, The jacking device, when operated while installed on the pulley mounting member, moves the pair of temporary support members relative to the pulley, and shifts the suspension body that was on the pulley to the pair of temporary support members, thereby temporarily supporting the load from the suspension body that was on the pulley. The jacking device has a pair of jack bodies, Each of the jack bodies is, A first guide holding hole is provided, and a mounting base is fixed to the pulley mounting member, A moving jig is provided with a slit and a screw hole, to which the temporary support member is attached, A stopper and guide that passes through the first guide holding hole and the slit, It has a jack bolt that is screwed into the aforementioned screw hole, The stopper and guide are passed through the first guide holding hole and the slit, thereby the moving jig is supported on the mounting base via the stopper and guide. An elevator suspension temporary support device in which, with the tip of the jack bolt in contact with the stopper/guide, the jack bolt is screwed in, causing the stopper/guide to move relative to the slit, and the moving jig and the temporary support member to move relative to the mounting base.
The temporary support device for an elevator suspension according to claim 4 , wherein the rotation of the moving jig due to the load from the suspension is prevented by the stopper and guide.
The temporary support device for an elevator suspension body according to claim 4 , wherein the stopper and guide has a groove formed in which the edge of the first guide holding hole is inserted.
The mounting base is provided with a second guide holding hole through which the stopper and guide passes. The temporary support device for an elevator suspension according to claim 4 , wherein the second guide holding hole is located at a position further away from the pulley mounting member than the first guide holding hole when the mounting base is installed on the pulley mounting member.
Each of the jack bodies further has an auxiliary stopper, The mounting base is provided with a mounting base side stopper holding hole, The aforementioned moving jig is provided with a jig-side stopper holding hole, The temporary support device for an elevator suspension according to claim 7, wherein the auxiliary stopper is passed through the stopper holding hole on the mounting base side and the stopper holding hole on the jig side, so that even when the stopper and guide are removed from the mounting base and the moving jig, the moving jig is supported on the mounting base via the auxiliary stopper .

Description

This disclosure relates to a method for replacing elevator pulleys and a temporary support device for a suspension system. In conventional methods for modifying machine-room-less elevators, the counterweight return wheel is removed from the upper support structure. Afterward, a new hoisting machine is installed in the location where the counterweight return wheel was previously attached to the upper support structure (see, for example, Patent Document 1). Patent No. 6806660 This is a perspective view showing an elevator according to Embodiment 1.This is a front view showing the state of the counterweight return wheel in Figure 1 during replacement.Figure 2 is a front view showing the mounting base.This is a side view showing the mounting base in Figure 3.Figure 2 is a front view showing the moving jig.Figure 5 is a side view showing the moving jig.Figure 5 is a plan view showing the moving jig.Figure 2 is a front view showing the stopper and guide.Figure 8 is a side view showing the stopper and guide.Figure 9 is a plan view showing the stopper and guide.This is a front view showing the state in which a pair of mounting bases are installed on the counterweight return beam of Figure 1.This is a side view showing the main part of Figure 11.This is a front view showing the state in which the moving jig is attached to each mounting base in Figure 11.This is a side view showing the main parts of Figure 13.This is a front view showing the state in which temporary support members are attached to each of the moving jigs in Figure 13.This is a side view showing the main parts of Figure 15.Figure 15 is a front view showing the state in which jack bolts are attached to each of the moving jigs.This is a side view showing the main parts of Figure 17.This is a front view showing the moving jig in the jacked-up position shown in Figure 17.This is a front view showing the stopper/guide in Figure 19 inserted through the second guide holding hole. The embodiments will be described below with reference to the drawings. Embodiment 1. Figure 1 is a perspective view showing an elevator according to Embodiment 1. The elevator of Embodiment 1 is a 2:1 roping type machine room-less elevator. In Figure 1, a car 12 and a counterweight 13 are provided in the hoistway 11. In Figure 1, the hoistway 11, the car 12, and some of the equipment are shown in a transparent view. The counterweight 13 is positioned behind the cage 12 (as viewed from the landing side) so that it faces the back of the cage 12 when it is at the same height as the cage 12. Within the elevator shaft 11, a first car guide rail 14a, a second car guide rail 14b, a first counterweight guide rail 15a, and a second counterweight guide rail 15b are installed. The first car guide rail 14a and the second car guide rail 14b guide the raising and lowering of the car 12. The first counterweight guide rail 15a and the second counterweight guide rail 15b guide the raising and lowering of the counterweight 13. An elevator hoisting machine 16 is installed in the lower part of the hoistway 11. The elevator hoisting machine 16 consists of a hoisting machine body 16a and a drive sheave 16b. The hoisting machine body 16a includes a hoisting machine motor (not shown) and a hoisting machine brake (not shown). The hoisting machine motor rotates the drive sheave 16b. The hoisting machine brake maintains the drive sheave 16b in a stationary state. The hoisting machine brake also brakes the rotation of the drive sheave 16b. An L-shaped return beam 17 is installed at the top of the elevator shaft 11. The return beam 17 is supported by the first car guide rail 14a, the first counterweight guide rail 15a, and the second counterweight guide rail 15b. Furthermore, the return beam 17 comprises a cage return beam 18 and a counterweight return beam 19. The counterweight return beam 19 is connected at a right angle to one end of the cage return beam 18. The first cage return wheel 20a and the second cage return wheel 20b are attached to the cage return wheel beam 18. The counterweight return wheel 21 is attached to the counterweight return wheel beam 19. The lower part of the cage 12 is equipped with a first cage suspension wheel 22a and a second cage suspension wheel 22b. The upper part of the counterweight 13 is equipped with a counterweight suspension wheel 23. The elevator of Embodiment 1 has a plurality of pulleys, including a drive sheave 16b, a first car return pulley 20a, a second car return pulley 20b, a counterweight return pulley 21, a first car suspension pulley 22a, a second car suspension pulley 22b, and a counterweight suspension pulley 23. The cage 12 and counterweight 13 are suspended within the hoistway 11 by a suspension system 24. The suspension system 24 can consist of multiple ropes or multiple belts. A rope-stopping beam 25 is horizontally fixed between the upper end of the second car guide rail 14b and the upper end of the second counterweight guide rail 15b. The rope-stopping b