JPH05319727A - Elongation detecting device of main rope of elevator - Google Patents

Abstract

PURPOSE:To measure the size of a space between a balancing weight and a spring buffer without requiring a maintenance personnel to enter into a pit, and by himself. CONSTITUTION:A measuring device 11 which is provided on mounting bodies that are mounted on the top of a spring buffer 8, for example, a cover 10 and a balancing weight 3, and measures the size of a space between these balancing weight 3 and cover 10, and an informing means that interlocks with this measuring device 11 and informs the size of the space, for example, an alarm device 12, are provided to an elongation detecting device of the main rope of an elevator. Therefore, enhancement of the operating efficiency and working efficiency of the elevator can be attempted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator main rope extension detecting device for detecting extension of a main rope for suspending a car and a counterweight.

[0002]

2. Description of the Related Art Generally, in a rope type elevator, since a car and a counterweight are suspended by a main rope, a weight of the counterweight is applied to the main rope and the main weight is gradually extended. To do. Along with this, the gap between the spring buffer provided in the pit at the bottom of the hoistway and the counterweight becomes smaller, so the extension of the main rope is confirmed and the gap is always maintained at the specified dimension. ing.

Therefore, conventionally, in order to confirm the amount of extension of the main rope, one maintenance worker drives the car and stops it at the top floor, and at the same time, another maintenance worker at the pit balances the balance weight. It was designed to measure the clearance between the and spring buffer.

[0004]

By the way, according to the above-mentioned conventional method of confirming the amount of extension of the main rope, the maintenance work for operating the car and the maintenance work for measuring the gap between the counterweight and the spring buffer in the pit are performed. Since two people are required, there is a problem that work efficiency is poor,
In order to ensure the safety of maintenance personnel entering the pit, it is necessary to stop the operation of the car during the measurement of the clearance dimension, which causes a problem that the operation efficiency of the elevator is reduced.

As a means for solving such a problem, it is proposed to provide a sensor in the pit as disclosed in Japanese Utility Model Laid-Open No. 58-137679, but it is expensive. Was not put into practical use.

The present invention has been made in view of the actual situation in the prior art as described above, and an object thereof is to eliminate the need for a maintenance staff to enter the pit and to make a clearance dimension between the counterweight and the spring buffer by one person. An object of the present invention is to provide an elevator main rope extension detection device capable of measuring

[0007]

In order to achieve this object, the present invention provides a car and a counterweight that ascend and descend in a hoistway, a main rope that suspends each of the car and the counterweight, and the above-mentioned hoisting and lowering. Used in an elevator provided in a pit at the bottom of a road and having a spring buffer facing the counterweight, in an elevator main rope extension detection device for detecting extension of the main rope, a mounting attached to the upper surface of the spring buffer. A measuring device provided on the body and the counterweight, for measuring the size of the gap between the counterweight and the mounting body, and an informing means that operates when the measured value of the measuring device reaches a predetermined value. And is provided.

[0008]

Since the present invention is configured as described above, when confirming the extension of the main rope, the maintenance personnel attaches the attachment body to the upper surface of the spring buffer, attaches the measuring device to the counterweight, and then attaches the cage. Is raised to the top of the hoistway and the counterweight is lowered to the lowest value. At this time, the measuring device measures the gap size between the counterweight and the mounted body, but when the measured value of the measuring device reaches a predetermined value set in advance, the notification means operates, and accordingly the maintenance personnel It is designed to recognize the gap size. As a result, it is possible to measure the size of the gap between the counterweight and the spring buffer by one person without requiring maintenance personnel to enter the pit.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a main rope extension detecting device for an elevator according to the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a hoistway showing an embodiment of an elevator main rope extension detecting device according to the present invention.

Generally, in an elevator, as shown in FIG. 1, a car 2 which moves up and down in a hoistway 1 and a counterweight 3
A main rope 4 for suspending the car 2 and the counterweight 3 respectively; a sheave 6 installed in the machine room 5 above the hoistway 1 around which the main rope 4 is wound; and a pit below the hoistway 1. 7 has a spring buffer 8 facing the counterweight 3 and a spring buffer 9 facing the car 2.

The main rope extension detecting device of the present embodiment is equipped with a mounting body mounted on the upper surface of the spring buffer 8, for example, a cover 10 and a lower portion of the counterweight 3, and the counterweight 3 and the cover 10 are connected to each other. A measuring device 11 for measuring a gap dimension 1 between the measuring device 11 and an informing means, such as an alarm device 12, which is formed integrally with the measuring device 11 and is activated when the gap dimension 1 reaches a predetermined value, for example, 300 mm. And are provided. Further, the above-described measuring device 11 has an output unit 13 that outputs ultrasonic waves, and a magnet 14 that detachably fixes the measuring device 11 to the lower portion of the counterweight 3.

In this embodiment, when the elongation of the main rope 4 is confirmed, the measuring device 11 is attracted from the top of the car 2 to the lower part of the counterweight 3 by the magnet 14, and then,
The car 2 is raised to the top of the hoistway 1 and the counterweight 3 is lowered to the lowest value. At this time, measuring device 1
1 measures the clearance dimension 1 between the counterweight 3 and the cover 10 while outputting ultrasonic waves from the output section 13, but the main rope 4 extends and the clearance dimension 1 is a predetermined value, that is, 30.
When it reaches 0 mm, the alarm device 12 outputs an alarm sound to notify the worker on the car 2.

In the embodiment constructed as described above, the size of the gap between the counterweight 3 and the spring buffer 8 can be measured by one person without the need for maintenance personnel to enter the pit 7. Further, the measuring device 11 is the magnet 1
Since it is attached to the counterweight 3 by 3, it is possible to attach to various counterweights, and this enables one measuring device 11 to measure the size of the gap between the counterweight of many elevators and the spring buffer. This can be done, and thus costs can be reduced compared to installing on a per elevator basis.

In the present embodiment, the gap size is measured by ultrasonic waves, but the present invention is not limited to this, and for example, an expandable and contractible antenna-like expandable body is used as the measuring device, and the expandable body is expanded. The alarm sound may be emitted by the pressure when the spring contacts the spring buffer 8.

[0016]

Since the present invention is configured as described above, it is not necessary for maintenance personnel to enter the pit for measuring the clearance dimension between the counterweight and the spring buffer, which allows the car The time for which the operation is stopped can be shortened, that is, the operation efficiency of the elevator can be improved. In addition, the elongation of the main rope can be measured by one person, and therefore the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a hoistway showing an embodiment of an elevator main rope extension detection device according to the present invention.

[Explanation of symbols]

 1 Hoistway 2 Car 3 Balancing weight 4 Main rope 8 Spring buffer 10 Cover (mounting body) 11 Measuring device 12 Alarm device (informing means) 13 Output part 14 Magnet

Claims (1)

[Claims] 1. A car and a counterweight that ascends and descends in a hoistway, a main rope that suspends the car and the counterweight, and a spring that is provided in a pit at the bottom of the hoistway and that opposes the counterweight. Used in an elevator having a buffer, in the elevator main rope extension detection device for detecting the extension of the main rope, the mounting body to be mounted on the spring buffer upper surface, the balance weight is provided, the balance weight and the above. Main rope extension detection of an elevator, characterized in that it is provided with a measuring device for measuring the size of the gap between the main body and the mounting body, and an informing means which is activated when the measured value of the measuring device reaches a predetermined value. apparatus.