JPH06286957A - Deterioration detecting method for elevator rope - Google Patents

Abstract

PURPOSE:To detect deterioration of a main rope more reliably and simply, to shorten an inspection time, and to improve reliability of an elevator. CONSTITUTION:The electric resistance value of a main rope 2. By comparing the measurements with the initial value thereof and the electric resistance value of the rope, the change with a time of the effective sectional area of the main rope 2 is detected, and rupture of the strand of the interior of the main rope 2 and deterioration owing to rust are detectable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of detecting deterioration of an elevator rope for detecting deterioration such as wear and breakage of an elevator rope.

[0002]

2. Description of the Related Art Conventionally, since ropes for elevators are made of steel, wear and breakage of strands occur with age. As a method of detecting such deterioration of an elevator rope, conventionally, each rope has been visually inspected for wear, breakage of wire, occurrence of rust and deformation. In addition, such a visual judgment criterion is JIS-A430.
2 Complies with "Elevator inspection standards".

[0003]

SUMMARY OF THE INVENTION With the above-mentioned conventional method of visually detecting the deterioration of an elevator rope, it is difficult to find a broken wire in the rope or thinness due to rust, and it takes time for inspection. There was a problem such as this. On the other hand, as a complementary device to detect the deterioration of the rope, there is a dedicated measuring device that uses the change of the magnetic flux leakage, but it is generally popular because it is expensive and its handling is not easy. Absent.

The present invention has been made to solve the above problems, and it is possible to detect the deterioration of the elevator rope more reliably and easily, and to shorten the inspection time. The purpose of the present invention is to obtain a method for detecting deterioration of an elevator rope that can improve the reliability of the elevator.

[0005]

A method for detecting deterioration of an elevator rope according to the present invention detects changes in the effective sectional area of the elevator rope over time by measuring the electric resistance value of the elevator rope. It is something that is done.

[0006]

In the present invention, the electric resistance value of the elevator rope is measured and compared with the initial value and the electric resistance value of other ropes to detect the decrease in the effective cross-sectional area due to wear or wire breakage. , Evaluate the quality of elevator ropes.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram for explaining a method for detecting deterioration of an elevator rope according to an embodiment of the present invention. In the figure, 1 is a hoist installed in a machine room above the hoistway, 2 is a plurality of main ropes that are ropes for an elevator that are wound around a sheave of the hoist 1, and 3 is a main rope 2.
The baskets 4 suspended at one end of the main rope 2 are counterweights suspended at the other end of the main rope 2.

5 is a beam above the car 3, 6 is each main rope 2
Is an insulating material for insulating one end of the main rope 2, 7 is a measurement terminal attached to one end of each main rope 2, 8 is a measurement rope switch attached to the top of the car 3, and 9 is each measurement terminal 7 For measurement, which is connected between the measuring rope switch 8 and the measuring rope switcher 10, 10 is a deterioration detector installed in the machine room, and 11 is connected between the measuring rope switcher 8 and the deterioration detector 10. A moving cable 12 is a wiring between the hoisting machine 1 and the deterioration detector 10.

With the above structure, in order to detect deterioration of the main rope 2, the car 3 is moved to the lowest floor, and the electric resistance between the hoisting machine 1 in the machine room and the measuring terminal 7 above the car 3 is increased. The value is measured by the deterioration detector 10. Such measurement is sequentially performed on all the main ropes 2 by switching the measurement rope switching device 8. After that, the deterioration detector 10 performs processing such as comparison between the measurement result and the initial value of the electric resistance value, and when the electric resistance value is equal to or larger than the set value or the electric resistance value of each main rope 2 is allowed. If there is an imbalance beyond the range, elevator operation is automatically suspended.

As described above, in the method of this embodiment, the deterioration of the main rope 2 can be detected by measuring the electric resistance value. That is, the main rope 2 is deteriorated with time,
For example, if abrasion, wire breakage, rust, etc. occur, the effective area of the main rope 2 decreases and the electrical resistance value increases.
The deterioration of the main rope 2 can be detected by measuring and comparing the electric resistance value with the deterioration detector 10. Therefore, according to the method of this embodiment, even if the deterioration of the main rope 2 that cannot be visually detected, such as the breakage of the strands or the occurrence of rust, occurs relatively easily and in a short time without using a complicated device. Can be detected.

The method of roping is not limited to the above-mentioned embodiment, and the present invention can be applied to elevators of other roping, and the hoisting sheave, the deflector, and the car can be used as needed. It is sufficient to electrically insulate the suspension vehicle, the suspension vehicle of the counterweight, and the top sheave groove for each rope.

For example, in the case of two-to-one roping, the suspension car of the car is insulated for each rope groove, and the rope end on the car side is insulated for each rope. When the car is on the lowest floor,
Rope 1 between the hoist in the machine room and the end of the car rope
The electrical resistance value for each book may be measured.

In the case of the basement type, the top sheave is insulated for each rope groove, and the rope end on the car side is insulated for each rope. When the car is on the lowest floor,
Rope 1 between the hoist in the machine room and the end of the car rope
The electrical resistance value for each book may be measured.

Further, in the above embodiment, the case where the deterioration of the main rope 2 is detected as the elevator rope has been described, but for example, the deterioration of the speed governor rope can also be detected. In this case, the grooves of the governor and the tensioning wheel for rope tension may have an insulating structure, and one end of the rope may be insulated.

Furthermore, since the reduction of the effective area is not uniform over the entire length, one rope may be divided into a plurality of parts, and the electric resistance values of the respective parts may be measured and compared. Can be specified.

[0016]

As described above, the method for detecting deterioration of an elevator rope according to the present invention measures changes in the effective cross-sectional area of the elevator rope by measuring the electrical resistance value of the elevator rope. Since it is detected, deterioration due to wire breakage and rust inside the rope can be detected, so deterioration of the elevator rope can be detected more reliably and easily, and the inspection time can be shortened. , It is possible to improve the reliability of the elevator.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining a method of detecting deterioration of an elevator rope according to an embodiment of the present invention.

[Explanation of symbols]

 2 Main rope (elevator rope)

Claims (1)

[Claims] 1. A method for detecting deterioration of an elevator rope, which comprises detecting the change over time in the effective sectional area of the elevator rope by measuring the electrical resistance value of the elevator rope.