JPH06144744A - Rope extending amount detecting device of elevator - Google Patents

Abstract

PURPOSE:To provide a rope extending amount detecting device which can measure the rope extending amount during the running condition of an elevator car. CONSTITUTION:This rope extending amount detecting device is provided with a neighboring position detecting device 3 to detect the neighboring position of a car 1a and a counterweight 1b and to output a signal; memory devices 10 and 11 to store car position signals output from position detecting devices 2d and 5, and the gap value r between the counterweight 1b and a bumper 10 beforehand, when the signal of the neighboring position detecting device 3 is output; and operation devices 9 and 12 to operate the position signals output from the position detecting devices 2d and 5, being operated by the position signals and the gap value r stored in the memory devices 10 and 11, and an instruction signal 7b.

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. Japanese Patent Publication No. 2-6047 discloses a rope extension amount detecting device for measuring the rope extension of an elevator by providing a moving distance measuring device for measuring a car moving distance.

[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.

Further, it is output until the measurement end signal is output when the measurement start position detection device receives the measurement start signal at one end side of the rope and the other end side of the rope reaches a predetermined position, that is, while the elevator is traveling. The rope extension is measured from the measurement start signal until the elevator stops and reaches the measurement end signal when it reaches the predetermined position on the other end side.Therefore, the measurement does not end unless the elevator stops. It was Therefore, when the elevator stops, if there is a flooring error in the car, the car moves after the sensor outputs the measurement end signal, or the car stops before the sensor operates and does not output the measurement end signal. There was an occasion.

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

[0006]

In order to achieve the above object, the present invention provides a shock absorber that softens the impact when the car and the counterweight fall to the bottom of the hoistway where the car and the counterweight ascend and descend. A rope connecting the counterweight and the position of the car in the hoistway are measured, and a position detection device that outputs a car position signal to the control circuit of the elevator is provided.
In an elevator rope extension detection device that measures the gap between the counterweight and the shock absorber when the car stops at the top floor, an adjacent position that detects the position where the car and the counterweight are adjacent and outputs a signal. A storage device that stores, in advance, a detection device and a car position signal of the position detection device and a gap value between the counterweight and the shock absorber when a signal of the adjacent position detection device is output, and a storage device that stores the storage device in the storage device. And an arithmetic unit for operating the cage position signal, the gap value, and the command signal to compute the cage position signal output from the position detecting device.

[0007]

[Operation] 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 calculation device calculates the amount of change and the rope is calculated. The amount of elongation and the gap between the counterweight and the shock absorber can be measured.

As described above, the amount of elongation of the rope can be measured while the car is running, and it can be measured with high accuracy without being affected by the floor landing error of the car, and wiring to the bottom of the hoistway is unnecessary.

[0009]

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

FIG. 1 is an explanatory view showing an embodiment of an elevator rope extension amount detecting device according to the present invention, and FIG. 2 is a block diagram showing the construction of a main part.

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 reflector 3a is attached to the counterweight 1b so that the car 3a emits light 3b from the light emitting portion and light 3b reflected by the reflector 3a. An optical sensor 3 which is an adjacent position detecting device having a contact 3c that closes when light is received is installed. 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, the pulse signal of the rotary encoder 2d is output to the counter 5, and the counter 5 displays the car 1a.
The rising signal 5a output when the
When it is input to the car 1a, it operates as an addition counter, and when the down signal 5b output when the car 1a descends, it operates as a subtraction counter. The output signal of the counter 5 serves as a position signal of the car 1a and the elevator control circuit 6 Is output to.

Further, a normally open contact 7a is provided between the power source Vcc and GN.
A rope extension measurement command relay 7 having 1, 7a2 and a transistor Tr are connected in series, and a rope extension measurement command signal 7b for externally providing a measurement command is input to the base of the transistor Tr.

The pulse signal reading device 8 which is maintained from the counter 5 via the normally open contact 7a2 reads the output signal of the counter 5, that is, the car position signal, when the signal is input to the terminal 8a. Here, a normally open contact 7a1 and a contact 3c are connected in series between the terminal 8a and the power supply Vcc.
Further, the pulse signal reading device 8 outputs the read car position signal to one terminal of the arithmetic device 9.

Further, a car position signal storage device 10 for storing a car position signal when the optical sensor 3 is activated in advance, 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 11 for storing the gap r of the above are respectively stored by the signal input of the car position setting signal 10a and the gap setting signal 11a.

The output terminal of the car position signal storage device 10 is connected to the other input terminal of the arithmetic device 9, the output terminal of the arithmetic device 9 is connected to one terminal of the gap arithmetic device 12, and the gap The other terminal of the arithmetic unit 12 is connected to the output terminal of the gap storage device 11. The gap r of the calculated value calculated by the gap calculator 12 is output to the display device 13 and displayed on the display device 13. Here, the arithmetic unit 9 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 calculates the subtracted value of the rope 1d from the initial value stored in the storage unit 10 in advance. Find the amount of elongation. In addition, the current gap r is obtained by subtraction by the gap calculation device 12 stored in the gap storage device 11.

Next, the operation will be described.

Now, a rope extension measurement command signal 7b indicating that the extension of the rope 1c is to be measured from a monitoring center (not shown) which remotely monitors the occurrence of an abnormality in the elevator via an external device, for example, a communication line. When it is input to the base of the
Since the -7-Tr-GN circuit is formed, the rope extension measurement command relay 7 is energized.

Next, a circuit (not shown) outputs an elevator traveling signal to the elevator control circuit 6 to cause the elevator 1a to perform the end floor operation. Since the car 1a and the counterweight 1b are adjacent to each other and the light sensor 3 receives the light 3b reflected from the reflection plate 3a, the contact 3c is closed, so Vcc-7a1-3.
The pulse signal reading device 8 is formed by the circuit of c-8a-8.
Reads the car position signal input by the circuit 5-7a2-8, and further outputs the car position signal to one input terminal of the arithmetic unit 9.

Here, the arithmetic unit 9 subtracts the car position signal stored in the car position signal storage unit 10 from the other input terminal and calculates the subtracted value to calculate the rope extension amount. Then, the dimension value is calculated and the dimension value is calculated.
Output to one of the input terminals, and the gap calculation device 12 determines the amount of rope extension input to the one input terminal from the input value of the other input terminal, that is, the initial value of the gap r stored in the gap storage device 11. The dimensional value is subtracted, and the gap r is measured by an external rope extension measurement command.
It is displayed in 3.

In this embodiment, the case where the measurement of the gap r is displayed on the display device 13 has been described, but the same effect can be obtained by transmitting the measurement data to a monitoring center (not shown). Also, the case where the rope extension measurement command signal 7b is output from the monitoring center (not shown) has been described, but the same effect can be obtained by outputting the rope extension measurement command signal 7b from the elevator control circuit at predetermined time intervals. In the present embodiment, the case where the rotary encoder 2d is used as the position detecting device has been described, but the present invention is not limited to this as long as it outputs the number of pulses proportional to the traveling amount of the car 1a.

[0024]

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 The amount of change can be calculated to measure the amount of rope extension and the gap between the counterweight and the shock absorber.

As described above, the amount of elongation of the rope can be measured while the car is running, and it can be measured with high accuracy without being affected by the landing error of the car, and wiring to the bottom of the hoistway is unnecessary.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an elevator rope extension amount detection device of the present invention.

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

[Explanation of symbols]

 1a cage 1b counterweight 1c rope 2d rotary encoder 3 optical sensor 3a reflector 5 counter 7b command signal 8 pulse signal reading device 9 arithmetic unit 10 car position signal storage unit 11 gap storage unit 12 gap calculation unit

Claims (1)

[Claims] 1. A car for cushioning a shock when a car and a counterweight fall to the bottom of a hoistway where a car and a counterweight move up and down, a rope connecting the car and the counterweight, and the car in the hoistway. It has a position detection device that measures the position and outputs a car position signal to the elevator control circuit,
In an elevator rope extension detection device that measures the gap between the counterweight and the shock absorber when the car stops at the top floor, an adjacent position that detects the position where the car and the counterweight are adjacent and outputs a signal. A storage device that stores, in advance, a detection device and a car position signal of the position detection device and a gap value between the counterweight and the shock absorber when a signal of the adjacent position detection device is output, and a storage device that stores the storage device in the storage device. An elevator rope extension amount detecting device comprising: a car position signal, a gap value and a command signal to operate a car position signal output from the position detecting device.