JPH06183662A - Rope elongation detecting device of elevator - Google Patents

Abstract

PURPOSE:To measure the eleongation of a rope with a high accuracy by computing the wear of the groove of the sheave, correcting the signal of the cage position, and computing the elongation of the rope when the cage is adjacent to the counter weight and the cage position is lower than the initial cage position. CONSTITUTION:When a command to measure the elongation of a rope 1c is given by a monitoring center, the end-to-end operation of a cage 1a (e.g. from the lowermost floor to the uppermost floor) is executed. The count value from when a photo sensor 25 detects the reflected light 25c from a reflective plate 25a to when the reflected light 25c from the reflective plate 25b is detected is read, and stored. The count value when the cage 1a is adjacent to a counter weight 1b and the photo sensor 3 receives the light 3b reflected by the reflective plate 3a is read. The difference between the count value of the counter and the initial value is calculated, and the wear of the groove of a sheave 2a is obtained, and the signal of the cage position of the initial value is corrected based on this wear, the initial cage position signal and the corrected cage position signal are computed and the rope elongation is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator rope extension amount detecting device.

[0002]

2. Description of the Related Art A measuring start position detecting device for detecting a short time before a car reaches a predetermined stop position on the opposite side of a car in a rope, and a detection start position detecting device for detecting a position until the car reaches the predetermined stop position. An apparatus for measuring the rope extension of an elevator by providing a moving distance measuring device for measuring the car moving distance is described in Japanese Utility Model Publication No. 2-6047.

[0003]

The above-mentioned prior art requires a signal from both ends of the rope, and therefore requires wiring for the detection device at the bottom of the hoistway.

Also, the signal is output until the measurement end signal is output when the other end side of the rope reaches a predetermined position after the measurement start signal of the measurement start position detecting device is obtained on the rope end side, that is, while the elevator is traveling. The rope elongation is measured from the measurement start signal to the measurement end signal when the elevator stops and reaches the predetermined position on the other end side.
If the elevator does not stop, the measurement does not end, and if there is a landing error in the car when the elevator stops, the car moves after the sensor outputs the measurement end signal, or the car moves before the sensor operates. It sometimes stopped and did not output the measurement end signal.

It is an object of the present invention to provide an elevator rope extension amount detecting device capable of highly accurately measuring the extension amount of a rope while a car is traveling.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a hoisting machine of a hoisting machine, in which a basket and a counterweight are connected by a rope, and the hoisting machine moves up and down depending on the rotating direction of the hoisting machine. Then, the car and the counterweight that lifts up and down the hoistway, a buffer that softens the impact when the car and the counterweight fall on the bottom of the hoistway, the rope and the car position in the hoistway, and the elevator control circuit is measured. A position detection device that outputs a car position by calculating a pulse number that is proportional to the number of revolutions of the hoist, and an elevator that measures a gap between the counterweight and the shock absorber when the car stops at the top floor. Of the rope extension amount detecting device, the adjacent position detecting device that detects a position where the car and the counterweight are adjacent to each other and outputs a signal, and the position detecting device when the signal of the adjacent position detecting device is output. A storage device for storing in advance a car position signal and a clearance value between the counterweight and the shock absorber, and a sheave groove wear measuring device for measuring the wear amount of the sheave groove in which the rope is hung on the sheave, A correction device for correcting the car position signal stored in the storage device from the wear amount, a car position signal and a gap value stored in the storage device, and a calculation for calculating the car position signal output from the position detection device. And a device.

[0007]

[Function] The car and the counterweight are adjacent to each other and the car position when the adjacent position detecting device outputs a signal is lower than the car position initially stored in the storage device, and the arithmetic unit calculates the change amount, When the sheave groove wears, the initial car position signal calculated by the number of pulses stored in the storage device when there is no wear in the sheave groove is used as the current number of pulses of the sheave groove wear amount. Correct the calculated car position signal,
Measure the amount of rope extension and the gap between the counterweight and the shock absorber.

As described above, the amount of rope extension can be measured with high accuracy while the car is running, without being affected by the car landing error and the wear of the sheave.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, a car 1a and a counterweight 1b are connected to a hoistway 1 via a rope 1c. Further, the rope 1c is hung on the sheave 2a and the deflector 2b, the rotation of the electric motor 2c is transmitted to the sheave 2a, and the rope 1c moves as the sheave 2a rotates. A rotary encoder 2d is attached to the rotary shaft of the electric motor 2c.

When the car 1a and the counterweight 1b are adjacent to each other, a reflecting plate 3a is attached at a position facing each other, that is, on the counterweight 1b, and light 3b is emitted from the light emitting portion on the car side.
And an optical sensor 3 which is an adjacent position detecting device having a contact 3c which closes when the light 3b reflected by the reflector 3a is received. A moving cable 4b is connected from the lower part of the car 1a to a control panel 4a of an elevator installed in the machine room 4.

At the bottom of the hoistway 1, a car shock absorber 1 is provided.
d and a counterweight shock absorber 1e are installed, and a basket 1a
The dimension r is controlled so that the clearance r between the counterweight 1b and the shock absorber 1e is kept within a predetermined dimension range for safety when the vehicle stops at the uppermost floor.

Further, reflectors 25a and 25b are attached to the lower and upper portions of the hoistway 1 at two positions where the car 1a runs, and light 25c is emitted from the light emitting portion below the car 1a.
Is provided, and an optical sensor 25 that outputs a pulse signal to the binary counter 6 when the light 25c reflected by the reflection plates 25a and 25b is received is installed.

The pulse signal of the rotary encoder 2d is output to the counter 5, and the counter 5 functions as an addition counter when the rising signal 5a output when the car 1a rises is input to the counter 5 and the car 1a. When the down signal 5b output when the vehicle goes down is input, it functions as a subtraction counter, and the output signal of this counter 5 is output to the elevator control circuit 7 as the position signal of the car 1a.

The pulse signal reading device 8 input from the counter 5 reads the output signal of the counter 5, that is, the car position signal, when a signal is input to the terminal 8a. Here, the terminal 8a is connected via a contact 3c to an input terminal 9a for a rope extension measurement command signal which gives a command for measuring the extension of the rope 1c. Further, the terminal 8b of the pulse signal reading device 8 is connected to the output terminal of the binary counter 6, and the input terminal of the binary counter 6 inputs the pulse signal output from the optical sensor 25 via the terminal 9b. Here, in the binary counter 6, the output terminal and the reset terminal 6a are connected. That is, the signal is output from the output terminal of the binary counter 6 at the falling edge of the first pulse signal, the signal at the output terminal is stopped at the falling edge of the second pulse signal, and the binary counter is output from the reset terminal 6a. The count of 6 is reset. Further, the pulse signal reading device 8 outputs the read car position signal to one terminal of the arithmetic unit 10.

A car position signal storage device 11 for storing a car position signal when the optical sensor 3 is initially operated, that is, an input signal of the pulse signal reading device 8, and a counterweight 1b and a shock absorber 1e at that time. And the gap storage device 12 for storing the gap r of the above are respectively stored as initial values by the signal input of the car position setting signal 11a and the gap setting signal 12a.

The output terminal of the car position signal storage device 11 is connected to the other input terminal of the arithmetic device 10, the output terminal of the arithmetic device 10 is connected to one terminal of the gap arithmetic device 13, and the gap arithmetic operation is performed. The other terminal of the device 13 is connected to the output terminal of the gap storage device 12. The gap r calculated by the gap calculator 13 is output to the display device 14 and displayed on the display device 14. Here, the arithmetic unit 10 subtracts the car position signals input to the two input terminals, calculates the subtracted value in consideration of the resolution of the rotary encoder 2d, and further stores the initial value stored in the storage unit 11 in advance. The amount of elongation of the rope 1d is obtained from the value. The initial value of the gap r stored in the gap storage device 12 is subtracted by the gap calculation device 13 to obtain the current gap r.

The pulse signal reading device 8 is connected to the common contact 15a of the changeover switch 15, and the common contact 15a.
The contact 15b connected to a is connected to an initial value storage device 16a that stores the count value of the counter 5 while the output signal of the binary counter 6 is being output to the terminal 8b. When the rope extension measurement command signal is input to the input terminal 9a, the changeover switch 15 receives the common contact 15a and the contact 1
5c is connected to the storage device 16b for storing the count value of the counter, and the storage devices 16a and 16b are connected to the sheave groove wear measuring device 17, respectively.

Here, the sheave groove wear measuring device 17 includes a reflecting plate 25 provided in the hoistway 1 stored in the storage device 16a.
The amount of wear of the groove of the sheave 2a is measured by calculating the pulse number of the rotary encoder 2d when the car 1a moves between a and 25b, that is, the difference in the count value of the counter 5. Further, the sheave groove wear measuring device 17 is input to the car position signal storage device 11 via the correction device 18.

Here, the correction device 18 uses the amount of wear of the groove of the sheave 2a obtained by the sheave groove wear measuring device 17 to determine the car position when the optical sensor 3 stored in the storage device 11 as an initial value is activated. Correct the signal. That is, when the groove of the sheave 2a is worn, the number of pulses obtained by the car position signal of the initial value is corrected by the number of pulses changed by the wear of the groove of the sheave 2a.

Next, the operation will be described.

Now, a rope extension measurement command signal (not shown) indicating that the extension of the rope 1c is to be measured from a monitoring center (not shown) that remotely monitors the occurrence of an abnormality in the elevator via an external device, for example, a communication line. When input to the command device, an elevator running signal is output to the elevator control circuit 7 by a circuit (not shown), and the end floor operation (for example, the lowest floor to the top floor) of the car 1a is performed.

When the optical sensor 25 detects the reflected light 25c from the reflection plate 25a and operates, the binary counter 6 outputs a signal to the terminal 8b and the reflected light 25c from the reflection plate 25b.
The pulse signal reading device 8 reads the count value of the counter 5 until the light sensor 25 detects it, and stores it in the storage device 16b via the contact 15c of the changeover switch 15.

On the other hand, when the car 1a and the counterweight 1b are adjacent to each other and the optical sensor 3 reflects the light from the reflector 3a and receives the light 3b, the contact 3c is closed, so that the measurement command signal is input to the terminal 9a and the pulse signal is read. The device 8 reads the car position signal input from the counter 5, and further outputs the car position signal to one input terminal of the arithmetic unit 10.

Further, the sheave groove wear measuring device 17 calculates the difference between the count values of the counter 5 stored in the storage device 16a storing the initial value and the storage device 16b, and calculates the wear amount of the groove of the sheave 2a. Based on this wear amount, the correction device 18 corrects the car position signal of the initial value stored in advance in the car position signal storage device 11 to the car position signal at the time of measurement when the groove of the sheave 2a is worn.

Next, the arithmetic unit 10 subtracts the car position signal input to the other input terminal and the car position signal corrected by the car position signal storage unit 11 and calculates the subtracted value to obtain the dimensional value of the rope extension amount. , The dimension value is output to one input terminal of the gap calculation device 13, and the gap calculation device 13 inputs one value from the input value of the other input terminal, that is, the initial value of the gap r stored in the gap storage device 12. The dimension value of the amount of rope extension input to the terminal is subtracted to measure the gap r, which is displayed on the display device 13.

[0027]

According to the present invention, the car position when the car and the counterweight are adjacent to each other and the adjacent position detecting device outputs a signal is lower than the original car position stored in the storage device, and the arithmetic device When the amount of change is calculated and when the sheave groove is worn, the initial car position signal calculated by the number of pulses when there is no wear in the sheave groove stored in the storage device is used as the current sheave groove By correcting the car position signal calculated by the number of pulses in the wear amount, the rope extension amount and the clearance dimension between the counterweight and the shock absorber are measured.

In this way, the amount of rope extension can be measured with high accuracy while the car is running, without being affected by the car landing error and the wear of the sheave.

[Brief description of drawings]

FIG. 1 is a positional relationship diagram of a basket and a counterweight showing an embodiment of an elevator rope extension amount detecting device according to the present invention.

FIG. 2 is a block diagram showing a main configuration of an embodiment of the present invention.

[Explanation of symbols]

 1a cage 1b counterweight 1c rope 2a sheave 2d rotary encoder 3, 25 optical sensor 3a, 25a, 25b reflector 5 counter 7b arithmetic unit 8 pulse signal reading unit 9 arithmetic unit 11 cage position signal storage unit 12 gap storage unit 13 gap Calculation device 17 Sheave groove wear measuring device 18 Correction device

Claims (1)

[Claims] 1. A basket at the bottom of a hoistway, in which a basket and a counterweight connected by a rope are hung on a sheave of a hoisting machine and moved up and down according to the rotation direction of the hoisting machine, and the car and the counterweight are elevated and lowered. And a shock absorber that softens the impact when the counterweight falls, the position of the car in the rope and the hoistway is measured, and the number of pulses proportional to the number of revolutions of the hoist is calculated in the elevator control circuit. In a position detecting device that outputs a car position and an elevator rope extension amount detecting device that measures a gap between the counterweight and the shock absorber when the car stops at the top floor, the car and the counterweight are adjacent to each other. The adjacent position detecting device that detects the position to output a signal and the signal of the adjacent position detecting device outputs the car position signal of the position detecting device and the gap value between the counterweight and the shock absorber. And a sheave groove wear measuring device for measuring the wear amount of the sheave groove in which the rope is hung on the sheave, and a car position signal stored in the storage device is corrected from the wear amount. A rope extension amount of an elevator, comprising: a correction device for controlling a car position signal and a gap value stored in the storage device; and a calculation device that calculates a car position signal output from the position detection device. Detection device.