Elevator

Abstract

The invention provides an elevator, which can easily evaluate deterioration of a rope and a sheave in the elevator. In the rope type elevator 100, a car 1 and a counter weight 6 are connected by the rope 2. The sheave 4 attached with the rope is rotated / driven by a motor to lift the car. A position detector 9 measures a speed of the car from the time when it passes between shutting off plates 8, 8 installed so as to be separated by a predetermined distance and a clearance of the shutting off plates. In a memory means possessed by an operation part 16, a relationship of a car speed and deterioration of the rope or the sheave is stored and the deterioration of the rope or the sheave is determined with reference to the memory means.

Description

technical field [0001] The invention relates to an elevator, in particular to a device used in the elevator for detecting abnormality of a sheave. Background technique [0002] An example of a conventional elevator is disclosed in Japanese Patent Application Laid-Open No. 2001-262482 of Patent Document 1. In the elevator equipment disclosed in this gazette, in order to reduce the diameter of the elevator sheave, a plurality of wire bundles constituting the cable sling are covered with resin, and the entire cable sling is covered with resin. In an elevator using such a resin-coated wire rope, aging of the resin increases the hardness of the resin, thereby reducing the coefficient of friction between the rope and the sheave. [0003] For this reason, it is necessary to regularly check the amount of slippage between the sling and the sheave and perform maintenance. Japanese Patent Application Laid-Open No. 7-10412 of Patent Document 2 discloses a method for detecting the amou...

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned Patent Document 1, although some consideration has been given to how to reduce the wear of the steel cable sling after the diameter of the sheave has been reduced, no sufficient consideration has been given to grasp the progress of the wear.

In addition, in the above-mentioned Patent Document 2, in order to detect the amount of slippage between the sheave and the sling, a photoelectric device, a reflective tape, etc. are added. Therefore, it is difficult to install these devices on the numerous elevators that have already been installed. lead to higher costs

Moreover, there are also problems such as the need for maintenance personnel to go to the scene for maintenance, and the need to stop running

[0009] In the above-mentioned Patent Document 3, the amount of slippage between the sling and the sheave is detected during the operation of the elevator to obtain the position of the elevator car, but it is difficult to distinguish the slippage that occurs in the sling or the sheave that has just been used. Normal slippage vs. abnormal slippage after aging

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