JP2002333431A - Wire rope diagnostic measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire rope diagnostic measuring device capable of executing precisely deterioration diagnosis of a wire rope, and reducing the labor of a maintenance worker at that time. SOLUTION: This device is equipped with an operation control part 13 having an evaluation operation means for dividing the evaluation range of an output voltage value from a leakage flux detection means into a first management region corresponding to a measuring noise, a second management region corresponding to the diameter change of the wire rope, and a third management region corresponding to wire rupture, and managing them. Therefore, omen diagnosis of wire breaking is executed based on the voltage values included in the second management region excepting those included in the first management region from among all the output voltage values, and the wire breaking is determined based on those corresponding to the third management region.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope diagnostic measuring apparatus for diagnosing and measuring a change in a cross-sectional area of a wire rope used in an elevator or the like or a break in a wire.

[0002]

2. Description of the Related Art A wire rope used in an elevator or the like is formed by twisting a predetermined number of steel wire strands to form a bundle, and bundling and twisting a plurality of the bundles. . Regarding the maintenance management of such wire ropes, Japanese Industrial Standard JIS430
2A shows an exchange standard. According to the exchange standard, when the strand breaks of the wire rope are distributed on average, five or more strands per strand indicating the length of one rotation of the twisted bundle are given. When a break occurs, the wire rope is considered to have reached its life and replaced. Further, as other criteria, the number of wire breaks per one strand of the bundle is determined due to a reduction in the broken cross-sectional area of the wire rope, the occurrence of concentrated breakage, and the like.

[0003] Conventionally, when the wire rope is managed as described above, for example, Japanese Patent Laid-Open No.
As described in JP-A-210968, noise caused by contact of an adjacent wire rope with a measuring device is prevented for a wire rope that measures breaks in an elevator suspended by a plurality of wire ropes installed in close proximity. For this purpose, a measuring instrument has been proposed in which both ends of a wire rope inlet and an outlet of the measuring instrument are provided with slopes. In this conventional measuring device, one end of the wire rope circumference is covered in a U-shape, and the other end of the wire rope circumference is open. Can be increased.

Further, as described in Japanese Patent Application No. 11-46860, for example, a wire rope is sandwiched between a wire rope and a winding mechanism in order to detect a wearable portion of the wire rope which can be predicted in advance. A magnetic body and a magnet interposed between them are separated as described above, and a wire break is detected by a magnetic flux detection element provided on the opposing surface of the magnetic body and the rope, and the detected output signal is output. On the other hand, in order to reduce the influence of noise, there has been proposed a wire rope wire breakage diagnosing device in which a squaring circuit is provided for an output signal and a determination circuit makes a determination.

[0005]

By the way, in the prior art described above, which is provided with a measuring device for measuring the breakage of the wire rope, one of the circumferences of the wire rope is covered in a U-shape and the other is covered. Is open, the wire breakage of the wire rope causes a difference in the output voltage value between the open side and the measurement unit side.For example, when the wire breakage on the open side is measured, the detected output voltage value Shows a lower output voltage value than the measuring unit side, and when the low output voltage value is amplified and evaluated, other noises other than the noise caused by the broken wire of the wire rope are also amplified. There is a problem that it is difficult to evaluate the identification of broken wires.

[0006] In addition, since the value other than the broken wire is treated as noise against the precursor that the wire diameter of the wire rope is reduced due to the sliding wear and the broken wire is generated, the wire rope is uniformly distributed over the entire length of the wire rope. When wire breaks occur simultaneously and frequently, there is a problem that it is difficult to perform a predictive diagnosis in a wire break diagnosis performed in a predetermined period. It is conceivable to increase the number of wire rope diagnoses in order to perform the above-mentioned sign diagnosis. However, in this case, the cost is increased and a user of an elevator equipped with the above-mentioned wire rope is required to travel vertically in a building. Cannot be used, thereby deteriorating the convenience, and in fact, the above-mentioned predictive diagnosis could not be performed.

Further, in the wire breakage diagnosis apparatus, the detection unit, the calculation unit, and the recording unit are stored in the same housing, and the measurement is performed by manually pressing the housing against the wire rope by a measuring operator. When the start and end operations are performed, the state of holding the housing is unstable. In particular, when measuring a plurality of wire ropes, there has been a demand for improvements in the safety and operability of the measurement operator.

The present invention has been made in view of such a situation in the prior art, and an object of the present invention is to accurately diagnose deterioration of a wire rope and to reduce the labor of maintenance workers at that time. It is an object of the present invention to provide a wire rope diagnosis / measurement device which can be used.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, at least one of a change in a cross-sectional area of a wire rope and a break in a wire is measured by using a leakage magnetic flux detecting means. In a wire rope diagnostic measuring device for diagnosing a deterioration state of the wire rope based on an output voltage value generated in an induction coil, an evaluation area of the output voltage value includes: a first management area corresponding to measurement noise; Evaluation management means for dividing into a second management area corresponding to the wire diameter change and a third management area corresponding to the wire breakage of the wire rope;
The deterioration state of the wire rope is evaluated based on the output voltage values included in the management area and the third management area.

[0010] In the invention according to claim 1 of the present invention, the evaluation area of the output voltage value generated in the induction coil of the leakage magnetic flux detection means is evaluated by the evaluation operation means in the first management area and the second management area. Area and a third management area, and based on all output voltage values included in the second management area except for those included in the first management area corresponding to the measurement noise. Predict diagnosis of wire rope breakage by measuring wire rope diameter change,
The wire rope breakage is determined based on the wire corresponding to the third management area. As a result, the deterioration diagnosis of the wire rope can be performed with high accuracy, and the deterioration of the wire rope can be measured and evaluated with high accuracy in this manner. Maintenance labor can be reduced.

According to a second aspect of the present invention, in the first aspect, an output voltage value from the leakage magnetic flux detecting means is digitized, and the digitized output voltage value is evaluated by the evaluation calculating means. A digital conversion means for outputting to the wire rope, a wire breakage predictive evaluation operation means for predicting the wire breakage of the wire rope, a wire breakage number evaluation calculation means for evaluating the wire breakage number of the wire rope, and Calculation result recording means for recording a calculation result by the evaluation calculation means,
A pass / fail determination unit that determines pass / fail of the wire rope based on the calculation result, wherein the digitized output voltage value is stored in the first management region to the third management region by value by the evaluation calculation unit. It is configured to be managed separately.

According to the second aspect of the present invention, the output voltage value outputted from the leakage magnetic flux detecting means is processed by the digital converting means, and the digitized output voltage value is converted into the value by the evaluation calculating means. Another first management area ~
A third management area is managed separately, and an evaluation calculation is performed by the predictive evaluation calculation means, the wire break evaluation calculation means, and the wire break count evaluation calculation means, and the calculation result is recorded in the calculation result recording means. The pass / fail judgment unit judges pass / fail of the wire rope based on the. This makes it possible to automatically diagnose the deterioration of the wire rope, eliminating the need for maintenance personnel to check for broken wires on the recording paper as in the past, greatly reducing the labor of maintenance personnel. I can do it.

According to a third aspect of the present invention, in the invention according to the second aspect, the digital conversion means, the evaluation calculation means, the wire breakage sign evaluation calculation means, the wire break count evaluation calculation means, the calculation A result recording unit and a pass / fail determination unit,
The configuration is provided separately from the leakage magnetic flux detecting means.

In the invention according to claim 3 of the present invention, the digital conversion means, the evaluation operation means, the wire breakage sign evaluation operation means, and the wire breakage number evaluation operation are provided separately from the leakage magnetic flux detection means. Means, calculation result recording means and pass / fail determination means, the leakage magnetic flux detection means can simplify the function as an induced voltage detection device, and all other functions are housed in a wire rope diagnosis and measurement device, and The size and the weight can be reduced. by this,
The maintenance worker can easily carry it, and even when the gap space between the adjacent wire ropes is limited, the handling at the time of measurement is simple.

According to a fourth aspect of the present invention, in the second aspect of the present invention, at least two leak magnetic flux detecting means are provided, and measurement is performed at two or more points on the circumference of the wire rope. It has a configuration.

In the invention according to the fourth aspect of the present invention, since the measurement is performed at two or more points on the circumference of the wire rope by two or more magnetic flux leakage detecting means, the deterioration state of the wire rope is determined. The accuracy of the measurement can be further improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wire rope diagnostic measuring apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a wire rope diagnosis / measurement apparatus according to one embodiment of the present invention, FIG. 2 is an explanatory view of an elevator equipped with the wire rope diagnosis / measurement apparatus of this embodiment, and FIG. FIG. 4 is a plan view of the wire rope diagnostic measuring apparatus according to the embodiment, and FIG. 4 is a characteristic diagram illustrating an evaluation region of an output voltage value measured in the present embodiment.

The elevator shown in FIG. 2 comprises a car 1, a counterweight 2, a hoist 3, a deflector 4, and a wire rope 5 suspending the counterweight 2 with the car 1.
It has.

The wire rope diagnosis / measurement device 6 of the present embodiment is connected to the leakage magnetic flux detecting means 7 via a cable 8. The leakage magnetic flux detecting means 7 is not shown in the drawing. 5 has a built-in leakage magnetic flux detection sensor for measuring a leakage magnetic flux due to a change in cross-sectional area and a broken wire, and an induction coil for generating an output voltage value. Further, the wire rope diagnosis / measurement device 6 has a storage case 21 shown in FIG. 3, in which the analog output voltage value from the rope leakage magnetic flux detecting means 7 is at least as shown in FIG. An input interface 11 capable of one or more inputs, a digital conversion means for digitizing an output voltage value input via the input interface 11, for example, an A / D converter 12, and an operation comprising a microcomputer A control unit 13 and a battery 14 serving as a power source of the arithmetic control unit 13 are built in.

As shown in FIG. 3, on the upper surface of the storage case 21, there are provided a display 22 for displaying the type of the wire rope 5, a predetermined speed, a reduction in the diameter of the wire, and the number of strands in the number of broken wires, and a battery 14. A power switch 23 for turning on and off, and a measurement start / instruction for instructing start and end of measurement.
An end switch 24, a display changeover switch 25 for changing the display content of the display 22, a wire rope setting switch 26 for setting the type of the wire rope 5, a speed changeover switch 27 for changing the running speed of the wire rope 5,
A lamp 30 is provided in the frame of the display 22. On both sides of the storage case 21, an external connector 28 for performing data communication with a personal computer (not shown) of a maintenance worker, and an arithmetic control unit 13 and another external connector 29 for performing data communication from the leakage magnetic flux detecting means 7 via the cable 8. The lamp 30 described above blinks when the measurement start switch 24 is pressed, and the display 30
Is notified that the operation switch cannot be operated, and when the measurement start / end switch 24 is re-operated, the blinking of the lamp 30 is stopped by blinking to enable the display operation, thereby preventing erroneous operation during measurement. ing.

Further, as shown in FIG.
Are a CPU (Central Processing Unit) 13a, a data memory 13b composed of a removable card-type memory and the like and storing digital data, and a ROM (Read Only Memory) 13c storing processing procedure data of the arithmetic control unit 13
A random access memory (RAM) 13d for storing the results of arithmetic control, a clock 13e for outputting a clock signal, an input circuit 13f connected to the switches 23 to 27 to take in input signals, and an external connector 28. An input / output interface 1 that is connected and has a communication function with a personal computer (not shown) of a maintenance worker.
3 g.

In the wire rope diagnosis / measurement device 6 of this embodiment, first, as a preparation step of the magnetic flux leakage detecting means 7, two magnetic flux leakage detecting means 7 are inserted between the adjacent wire ropes 5, respectively. After the magnetic flux detecting means 7 is mounted on the wire rope 5 so as to be measured at two points on the circumference, the car 1 is run at a predetermined speed and the leakage magnetic flux detecting means 7 is operated to output an induced analog voltage value. The data is transmitted to the input interface 11 via the cable 8.

Next, as a preparation step of the wire rope diagnostic measuring device 6, after the power switch 23 is turned on, a predetermined rope type is set by pressing a wire rope setting switch 26, and a predetermined rope type is set by pressing a speed changeover switch 27. Of the set rope type and wire rope speed are displayed on the display 22.
And is stored in the CPU 13a of the arithmetic control unit 13, so that the measurement position of the wire diameter reduction or strand break measurement can be calculated based on the measurement time measured by the clock 13g and the predetermined speed stored in the CPU 13a. .

Then, as a measurement step, the measurement start / end switch 24 is turned on, and the hoist 3 is driven at a predetermined speed, so that the induced analog voltage corresponding to the leakage magnetic flux amount of each leakage magnetic flux detecting means 7 is A / D. The data is converted into a digital value by the converter 12 and the data
b. Next, when the drive of the hoist 3 is stopped, the measurement start / end switch 24 is turned on again to end the data storage.

When the measurement start / end switch 24 is turned on again as described above, the calculation of the measurement data stored in the data memory 13b of the calculation control unit 13 is started, and at the start of the calculation, two data are first stored in the ROM 13c. An evaluation operation of dividing the measurement data in the opposite directions into three layers, ie, a noise output value, a wire diameter reduction output value, and a strand break output sequence, is performed, and as shown in FIG. To the first management areas 0 to a1 corresponding to the measurement noise,
Second management area a corresponding to a change in the diameter of the wire rope 5
1 to a2 and a third management area x corresponding to the wire breakage
It is managed separately for one or more.

For example, when the converted digital values V1 to V4 are output from the A / D converter 12, the digital value V1
Are in the first management areas 0 to a1 and thus correspond to the measurement noise. Since the digital value V2 is in the second management areas a1 to a2, the digital value V2 corresponds to the change in the wire diameter of the wire rope 5. Since the digital value V3 is in the third management area x1 to x2, it is determined that the digital value V3 corresponds to one broken wire. Further, since the digital value V4 is in the range of the third management area x2 or more. It is determined that it corresponds to two broken wires. Then, the above digital value V1
To V4, the data group of the digital value V2 corresponding to the change in the wire diameter of the wire rope 5 is stored as predictive data in the RAM 13d, and the digital value V3 and the third value in the third management areas x1 to x2 are stored. Based on the broken wire data of the digital value V4 in the range equal to or larger than the management area x2, a comparison operation is performed with a previously stored wire broken line number by type of wire rope 5 to calculate the number of broken wires. And stores it in the RAM 13d. Also, based on the required time from the start of detection to the end of detection measured by the clock 13g and the above-mentioned predetermined speed, the time from the start of the measurement when the output of the wire diameter reduction data or the wire breakage data is obtained and the respective output measurement time Based on the time interval, the wire diameter decreasing position, and the length of one strand of the wire rope 5 stored in advance, the number of strands broken in one strand and the number of each strand are calculated, and the calculation result is stored in the RAM 13d. To be stored. Next, when a value of the rejection area out of the pass / fail evaluation values set in advance is displayed, a rejection is displayed on the display 22, and the display 22 is blinked, for example, to call attention.

In the wire rope diagnosis / measurement apparatus 6 of the present embodiment configured as described above, the evaluation area of the output voltage value generated in the induction coil of the leakage magnetic flux detection means 7 is separately managed, and all the output voltage values are evaluated. Except for those included in the first management areas 0 to a1 corresponding to the measurement noise, the second management areas a1 to a2 corresponding to the change in the wire diameter of the wire rope 5 and the wire breakage of the wire rope 5 are excluded. By selecting an object included in the corresponding third management area x1 or more and evaluating the state of deterioration of the wire rope 5, it is possible to accurately perform a predictive diagnosis of a broken wire of the wire rope 5 and to improve accuracy. As a result, it is not necessary to perform the measurement several times, so that the labor of the maintenance worker can be reduced.

Further, in the present embodiment, the output voltage value generated in the leakage magnetic flux detecting means 7 is converted, an evaluation operation is performed based on a digital value, and the pass / fail of the wire rope 5 is determined based on the operation result. By making the determination, the wire break of the wire rope 5 can be automatically diagnosed and measured, so that the work of the maintenance worker confirming the wire break on the recording paper as in the related art can be eliminated, and the labor of the maintenance worker can be reduced. Can be greatly reduced. Further, the data stored in the data memory 13b can be transmitted without correction by transmitting the data to the personal computer of the maintenance worker using the external connector 28. By analyzing the breaks and their positions and displaying them in a graph, the determination can be made without the trouble of confirming the breakage of the strands on the recording paper.

Further, in the present embodiment, since another function of the wire rope diagnosis / measurement device 6 is provided separately from the leakage magnetic flux detecting means 7, the leakage magnetic flux detecting means 7 functions as an induced voltage detecting device. , And all other functions can be stored in the wire rope diagnostic measuring device 6 to reduce the size and weight. This allows the maintenance worker to easily carry the wire rope diagnosis / measurement device 6, and also facilitates handling during measurement even when the gap space between adjacent wire ropes is limited.

Further, in this embodiment, since the measurement is performed at two or more points on the circumference of the wire rope 5 by the two leakage magnetic flux detecting means 7, the accuracy of measuring the deterioration of the wire rope 5 is further improved. Can be improved.

In the present embodiment, since various functions are arranged on the upper surface of the storage case 21, the operation of the maintenance worker is easy.

Further, in the present embodiment, after the measurement is completed, it is possible to surely grasp the reduced wire diameter portion or the broken wire portion of the wire rope 5, and during the measurement, a maintenance worker is required to perform the measurement operation. Can be concentrated, so that safety at the time of measurement work can be improved. Conventionally, when a wire breakage portion passes during measurement, there has been an unsafe measurement example in which a buzzer sounds to notify the wire breakage and the car position at the time of the buzzer sound is confirmed by operation of a floor relay or the like. .

In the present embodiment, it is also possible to display a strand position where the wire diameter has decreased or the number of strands has exceeded a specified value by operating switches other than the power switch 23.

In this embodiment, the CPU 13a of the arithmetic control unit 13 and the ROM 13c determine the evaluation area of the output voltage value from the leakage magnetic flux detecting means 7 by using the first management area corresponding to the measurement noise and the wire rope 5. Evaluation calculating means for dividing into a second management area corresponding to a change in the wire diameter and a third management area corresponding to a wire break of the wire rope 5; An evaluation calculating means, a wire breakage number evaluation calculating means for evaluating the number of wire breaks of the wire rope 5, and a pass / fail determination means for determining whether the wire rope 5 has passed or failed based on the calculation result are constituted by the RAM 13d. An operation result recording means for recording the operation result by the evaluation operation means is constituted.

[0036]

As described above, according to the first aspect of the present invention,
In the invention according to the first aspect, the output voltage values generated in the induction coil of the leakage magnetic flux detection means are based on those included in the second management area except for those included in the first management area corresponding to the measurement noise. In this case, the predictive diagnosis of the wire rope breakage is performed, and the wire rope breakage is determined based on the one corresponding to the third management area. Therefore, the deterioration diagnosis of the wire rope can be performed accurately and the maintenance is performed at that time. Workers' labor can be reduced.

In the invention according to claim 2 of the present invention,
Since the deterioration diagnosis of the wire rope can be automatically performed, the maintenance worker does not need to check for broken wires on the recording paper as in the related art, and the labor of the maintenance worker can be greatly reduced.

Further, in the invention according to claim 3 of the present invention,
Since the function of the leakage magnetic flux detecting means as an induced voltage detecting device can be simplified, and all other functions can be stored in the wire rope diagnostic measuring device, the overall size and weight can be reduced. Can be easily carried, and even when the gap space between adjacent wire ropes is limited, handling during measurement is simple.

In the invention according to claim 4 of the present invention,
Since the measurement is performed at two or more points on the circumference of the wire rope by two or more leakage magnetic flux detection means, the accuracy of measuring the deterioration state of the wire rope can be further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a wire rope diagnosis and measurement device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an elevator provided with the wire rope diagnostic measuring device of the present embodiment.

FIG. 3 is a plan view of the wire rope diagnosis / measurement device of the present embodiment.

FIG. 4 is a characteristic diagram illustrating an evaluation region of an output voltage value measured in the present embodiment.

[Explanation of symbols]

 Reference Signs List 5 wire rope 6 wire rope diagnostic / measuring device 7 leakage magnetic flux detection means 8 cable 11 input interface 12 A / D converter (digital conversion means) 13 arithmetic control unit 13a CPU 13b data memory 13c ROM (calculation result recording means) 13d RAM 13e Clock 13f Input circuit 13g Input / output interface 14 Battery 21 Storage case 22 Display 23 Power switch 24 Measurement start / end switch 25 Display changeover switch 26 Wire rope setting switch 27 Speed changeover switch 28, 29 External connector 30 Lamp

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyoshi Naganuma 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo F-term in Hitachi Building Systems Co., Ltd. (Reference) 2G053 AA11 AA14 AB22 BA14 BC02 BC14 CA03 CB21 DB20 DB26 3F305 BB02 BC36

Claims (4)

[Claims] 1. A wire rope diagnostic measurement for measuring at least one of a change in a cross-sectional area of a wire rope and a break in a wire by using a leakage magnetic flux detecting means and diagnosing a deterioration state of the wire rope by an output voltage value generated in an induction coil. In the apparatus, the evaluation area of the output voltage value may be a first management area corresponding to a measurement noise, a second management area corresponding to a change in a wire diameter of the wire rope, and a breakage of a wire of the wire rope. Evaluation management means for dividing into a third management area
Of the output voltage values, the second management area and the third
A wire rope diagnosis / measurement apparatus for evaluating a deterioration state of the wire rope based on an output voltage value included in a management area of the wire rope. 2. A digital conversion means for digitizing an output voltage value from the leakage magnetic flux detection means and outputting the digitized output voltage value to the evaluation operation means, and predictively evaluates a break in the wire rope. Wire breakage sign evaluation calculation means, wire break count evaluation calculation means for evaluating the number of wire breaks of the wire rope, calculation result recording means for recording the calculation results by these evaluation calculation means, Pass / fail judgment means for judging pass / fail of the wire rope on the basis of the digitized output voltage value, and the digitized output voltage value is divided into the first management area to the third management area and managed by the evaluation calculation means. 2. The wire rope diagnostic measuring device according to claim 1, wherein: 3. The digital conversion means, the evaluation calculation means,
Strand break predictive evaluation means, strand break count evaluation means,
3. The wire rope diagnosis and measurement device according to claim 2, wherein the calculation result recording unit and the pass / fail determination unit are provided separately from the leakage magnetic flux detection unit. 4. The wire rope diagnosis and measurement device according to claim 2, wherein at least two leakage magnetic flux detection means are provided, and measurement is performed at two or more points on the circumference of the wire rope.