JP2596622B2 - Elevator main rope elongation detector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to an elevator main rope elongation detector, and more particularly to an elevator main rope elongation suitable for efficiently detecting the main rope elongation. It relates to a detection device.

[Related Art] In general, in an elevator, the weight of a car and a counterweight is applied to a main rope, so that the main rope gradually expands. Along with this, the gap between the counterweight located at the lowermost part of the hoistway and the buffer for the counterweight is reduced, so the amount of elongation of the main rope is checked and the above-mentioned gap is always adjusted. The specified dimensions are maintained.

Conventionally, in order to detect the amount of elongation of the main rope, one maintenance person stops the car on the top floor, and the other person balances the weight with the buffer at the lower part of the hoistway. The size of the gap between them was measured.

[Problem to be Solved by the Invention] By the way, in the above-mentioned conventional technology, two maintenance personnel are required to measure the gap size between the counterweight and the shock absorber, so that work efficiency is reduced. There was a problem of bad. In addition, in order to ensure the safety of maintenance personnel entering the pits at the bottom of the hoistway, it is necessary to stop the operation of the car during the measurement of the above gap size, which causes a problem that the operating rate of the elevator is reduced. .

As one means for solving such a problem, for example, as shown in Japanese Utility Model Application Laid-Open No. 58-137679, a sensor provided in a pit has been proposed. I haven't been.

The present invention has been made in view of such a situation in the related art, and has as its object the purpose of eliminating the need for maintenance personnel to enter the pit, and furthermore, the size of the gap between the counterweight and the shock absorber alone. It is an object of the present invention to provide an elevator main rope elongation detecting device capable of measuring.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a car and a counterweight capable of ascending and descending in a hoistway, a main rope suspending the car and the counterweight, and An elevator main rope elongation detector for detecting the amount of elongation of the main rope, which is used in an elevator having a buffer provided in a pit at the lower part of the road and facing the counterweight, has an expandable antenna shape. An elastic body that is contracted by application of a pressing force and maintains its contracted state even when the pressing force is released, and an attaching means for detachably attaching the elastic body to a lower portion of the counterweight. By attaching the telescopic body to the lower part of the counterweight and lowering it, the telescopic body can be pressed against the shock absorber and compressed. It was configured so that:

[Operation] Since the elevator main rope elongation detecting device of the present invention has such a configuration, the elevator maintenance person attaches the elevator to the lower part of the counterweight with the telescopic member extended, and then removes the car. When it is raised to the top of the hoistway, the counterweight is accordingly lowered to the bottom of the hoistway. Then, if the main rope of the elevator is extended and the gap size between the counterweight and the shock absorber is smaller than a predetermined value, the elastic body is pressed against the shock absorber opposed to the counterweight, Shrinks according to the amount of main rope elongation. The elevator maintenance person then lowers the car, thereby raising the counterweight and lowering the car to the same height as the counterweight. In that case, the elastic body maintains the contracted state as described above. Therefore, elevator maintenance personnel can determine the gap between the counterweight and the shock absorber by measuring the length of the telescopic body on the car roof.
The measurement can be performed by one person without entering the pit, and the extension of the main rope of the elevator can be correctly detected based on the measurement result. After measuring the length of the elastic body in this way, the elastic body is removed from the lower part of the counterweight, but the elastic body is detachably attached to the lower part of the counterweight in this manner. By mounting on the counterweights of various elevators, the gap size between the counterweight and the shock absorber can be measured for many elevators.

[Embodiment] An embodiment of an elevator main rope elongation detecting device of the present invention will be described below with reference to the drawings.

1 and 2 are explanatory views showing an embodiment of an apparatus for detecting the amount of elongation of a main rope of an elevator according to the present invention. FIG. 1 is an elevator showing a state of measuring a gap size between a counterweight and a shock absorber. FIG. 2 is a front view showing a counterweight and a shock absorber of FIG.

In general, an elevator has a hoistway 1 as shown in FIG.
A car 2 and a counterweight 3 that can be raised and lowered in the interior, a main rope 4 that suspends the car 2 and the counterweight 3, and a main rope 4 installed around a machine room 5 above the hoistway 1. It has a sheave 6 and a shock absorber 8 which is provided at a pit 7 below the hoistway 1 and faces the car 2 and a shock absorber 9 which faces the counterweight 3.

As shown in FIG. 2, the measuring device 10 of the present embodiment is provided below the counterweight 3 in a state facing the shock absorber 9. The measuring device 10 includes, for example, an expandable and contractible antenna-like elastic body 11 composed of four cylindrical bodies having different diameters, and is attached to a base of the elastic body 11 and attached to a lower portion of the counterweight 3. It consists of a possible magnet body 12. In addition, the above-mentioned elastic body 11 contracts when it is pressed in the longitudinal direction by external force, and thereafter, when the external force is released, its length dimension is maintained without expanding and contracting,
The configuration is such that a gap dimension between the shock absorber 9 is measured and the measured value can be held.

In this embodiment, a maintenance person gets on the car 2
The magnet body 12 is attached to the lower part of the counterweight 3 while the elastic body 11 of the measuring device 10 is extended. Next, when the car 2 is raised to the uppermost part of the hoistway 1, the counterweight 3 is guided by the guide rail 13 in FIG. At this time, for example, if the gap between the counterweight 3 and the shock absorber 9 is smaller than a predetermined value because the main rope 4 is considerably elongated, the distal end of the elastic body 11 of the measuring device 10 comes into contact with the shock absorber 9, and The elastic body 11 shrinks. Then, car 2
When the counterweight 3 is raised by driving the
Is maintained in a contracted state. Therefore, the car 2 is lowered until the height of the measuring device 10 becomes the same as that of the measuring device 10, and thereafter,
The maintenance person who operated car 2 has an elastic body on the roof of car 2
Measure the 11 length dimensions. By measuring the length of the elastic body 11 in this manner, the gap size between the counterweight 3 and the shock absorber 9 can be measured, and the extension of the main rope 4 is correctly detected based on the measurement result. can do.

In the embodiment configured in this way, it is not necessary for a maintenance person to enter the pit 7, and the size of the gap between the counterweight 3 and the shock absorber 9 can be measured by one person. Further, since the measuring device 10 has a relatively simple structure including the elastic body 11 and the magnet body 12, the cost does not increase. And since the measuring device 10 has the magnet body 12, it can adhere to various different counterweights via the magnet body 12,
As a result, the gap size between the counterweight of many elevators and the shock absorbers can be measured by one measuring device 10, and the installation cost can be reduced as compared with the case where each elevator is installed for each elevator.

[Effects of the Invention] As is apparent from the above description, according to the present invention, the main rope elongation detecting device for an elevator is configured as described in the section of "Means for Solving the Problems". So, without the need for maintenance personnel to enter the pit,
An elevator main rope elongation detecting device capable of measuring a clearance dimension between a counterweight and a shock absorber alone can be obtained. As a result, if the gap dimension between the counterweight and the shock absorber is measured using the elevator main rope elongation detecting device of the present invention, it contributes to the improvement of the work efficiency of the measurement work and the operation efficiency of the elevator. This elevator main rope elongation detecting device is a simple one in which an extendable antenna-like telescopic body is attached to a counterweight and its length is actually measured. [Problem] compared to a device that detects the amount of elongation of the main rope by a control circuit provided with a large number of sensors and lamps and memories, as in the conventional device described in Japanese Utility Model Application Laid-Open No. 58-137679. The structure is simple and the production cost does not increase. Further, when such an antenna-like telescopic body is attached to the counterweight, in particular, since it can be detachably attached by the attaching means, it is attached to the counterweight of various other elevators, so that many elevators are balanced. The gap size between the weight and the shock absorber can be measured. As a result, the installation cost can be reduced as compared to a device that requires installation for each elevator like the above-described conventional device.

[Brief description of the drawings]

1 and 2 are explanatory views showing an embodiment of an apparatus for detecting the amount of elongation of a main rope of an elevator according to the present invention. FIG. 1 is an elevator showing a state of measuring a gap size between a counterweight and a shock absorber. FIG. 2 is a front view showing a counterweight and a shock absorber of FIG. 1 ... hoistway, 2 ... basket, 3 ... balance weight,
4 ... main rope, 7 ... pit, 9 ... shock absorber, 10 ...
Measuring device, 11: telescopic body, 12: magnet body.

Claims (1)

(57) [Claims] A car and a counterweight capable of ascending and descending in a hoistway, a main rope suspending the car and the counterweight, and a shock absorber provided in a pit below the hoistway and facing the counterweight. The main rope elongation detecting device of the elevator is used for an elevator having a main rope and detects the elongation of the main rope. Even if the contracted state is maintained,
Mounting means for detachably attaching the elastic body to the lower part of the counterweight, and attaching and lowering the elastic body to the lower part of the counterweight to allow the elastic body to contact the shock absorber. A main rope elongation detecting device for an elevator, wherein the main rope elongation detecting device is configured to be capable of being pressed and contracted.