JP2020040763A - Elevator inspection device - Google Patents

Abstract

To provide an elevator inspection device of a novel configuration where, for example, inconvenience is more limited.SOLUTION: This elevator inspection device comprises: a degradation index calculation unit that calculates a rope degradation index based on the rotational angle of a sheave corresponding to the predetermined length of a rope; and a degradation determination unit that determines the degradation of the rope on the basis of the degradation index.SELECTED DRAWING: Figure 3

Description

  Embodiments relate to an elevator inspection device.

  2. Description of the Related Art Conventionally, an elevator inspection device that measures a diameter of a rope using laser light is known.

JP 2014-101197 A

  In an elevator inspection apparatus of this type of elevator, it would be beneficial if an elevator inspection apparatus having a new configuration with less inconvenience, such as a simplified configuration, could be obtained.

  The elevator inspection device of the embodiment is a deterioration index calculation unit that calculates a deterioration index of the rope based on the rotation angle of the sheave corresponding to a predetermined length of the rope, a deterioration determination unit that determines the deterioration of the rope based on the deterioration index, Is provided.

FIG. 1 is a schematic and exemplary diagram of an elevator to which the elevator inspection device according to the embodiment is applied. Drawing 2 is a typical and exemplary sectional view of a rope of an elevator to which an elevator inspection device of an embodiment is applied. FIG. 3 is a schematic and exemplary block diagram of the elevator inspection device according to the embodiment. FIG. 4 is a graph illustrating the correlation between the position of the car and the detected value of the rotation angle obtained by the elevator inspection device of the embodiment.

  Hereinafter, exemplary embodiments and modifications of the elevator inspection device 7 will be disclosed. The configurations and controls (technical features) of the embodiments described below, and the actions and results (effects) brought by the configurations and controls are examples.

  FIG. 1 is a configuration diagram of the elevator 100. As shown in FIG. 1, the elevator 100 includes a car 1, a rope 2, a weight 3, a plurality of sheaves 4, a motor 5, a plurality of position sensors 6, and an elevator inspection device 7.

  The car 1 moves up and down the hoistway H provided in the building.

  The rope 2 suspends the car 1 and the weight 3. One end 2a and the other end 2b of the rope 2 are connected to the building via a rope hitch 11, respectively. The rope 2 is wound around a plurality of sheaves 4 between one end 2a and the other end 2b.

  The sheave 4 has a motor sheave 41, a car sheave 42, and a weight sheave 43.

  FIG. 2 is a sectional view of the rope 2. As shown in FIG. 2, the rope 2 is a resin-coated rope, and has a core steel 21, a plurality of strands 22, and a resin coating 23. Each of the core steels 21 is surrounded by six strands 22 extending in a spiral shape. The resin coating 23 surrounds the six strands 22. The resin coating 23 is made of, for example, a synthetic resin material such as an epoxy resin.

  The motor 5 moves the rope 2 wound around the motor sheave 41 by rotating the motor sheave 41, thereby moving the car 1 and the weight 3 up and down.

  The control device (not shown) controls the operation and the position of the car 1 by controlling the rotation of the motor 5.

  The rotation angle sensor 51 detects the rotation angle of the rotor 5a of the motor 5, and outputs a position detection signal. The rotation angle sensor 51 is, for example, a rotary encoder.

  The plurality of position sensors 6 are provided so as to face the hoistway H at different positions, detect the position of the car 1, and output a position detection signal. The position sensor 6 is, for example, a position detection switch that detects the position of a position detection marker 61 provided on the hoistway H, a photoelectric sensor, a landing sensor, or the like. Note that the position sensor 6 may detect the position of the weight 3 or the position of a specific portion of the rope 2. The position sensor 6 is an example of a sensor.

  FIG. 3 is a block diagram of the elevator inspection device 7. As shown in FIG. 3, the elevator inspection device 7 includes a rotation detection value acquisition unit 71, a position detection value acquisition unit 72, a deterioration index calculation unit 73, a deterioration determination unit 74, an output control unit 75, and a storage unit 76. .

  The arithmetic processing and control by the elevator inspection device 7 may be executed by software or may be executed by hardware. The arithmetic processing and control by the elevator inspection device 7 may include arithmetic processing and control by software and arithmetic processing and control by hardware. In the case of processing by software, the elevator inspection device 7 reads and executes a program (application) stored in a recording medium (storage medium) such as a ROM, an HDD, an SSD, and a flash memory. The elevator inspection device 7 operates according to the program, and thereby includes the components included in the elevator inspection device 7, that is, the rotation detection value acquisition unit 71, the position detection value acquisition unit 72, the deterioration index calculation unit 73, and the deterioration determination unit 74. , And functions as the output control unit 75 and the like. In this case, the program includes modules corresponding to the above units.

  The program can be provided in the form of a file in an installable format or an executable format, which is recorded on a computer-readable recording medium such as a CD-ROM, FD, CD-R, DVD, or USB memory. Further, the program can be introduced by being stored in a storage unit of a computer connected to a communication network and downloaded via the network. Further, the program may be incorporated in a ROM or the like in advance.

  When at least a part of the elevator inspection device 7 is configured by hardware, the elevator inspection device 7 may include, for example, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), and the like. .

  The rotation detection value acquisition unit 71 acquires a rotation detection value from a rotation detection signal from the rotation angle sensor 51.

  The position detection value acquisition section 72 acquires a position detection value from a position detection signal from the position sensor 6.

  The deterioration index calculating unit 73 acquires the rotation detection value and the position detection value, and calculates the deterioration index of the rope 2 based on these.

  When the rope 2 is a resin-coated rope covered with the resin coating 23 as described above, as the core steel 21 and the strand 22 slide and wear, the diameter of the rope 2 decreases and the rope 2 extends. I know that.

  The inventors have conducted intensive studies on such deterioration of the coated resin rope, and have come to the following new knowledge. That is, when the diameter (radius) of the rope 2 decreases with the deterioration of the rope 2, the distance from the center C of the motor sheave 41 (FIG. 1) to the center line of the rope 2 wound around the motor sheave 41 accordingly. Is reduced (FIG. 1, hereinafter referred to as a winding radius R). As the winding radius R decreases, the feed amount of the rope 2 per rotation angle of the motor sheave 41, that is, the movement amount of the car 1 or the weight 3 decreases. Therefore, the movement amount of the car 1 corresponding to the predetermined rotation angle of the motor sheave 41 decreases as the rope 2 deteriorates and the diameter (radius) decreases. In other words, the amount of movement of the car 1 or the weight 3, that is, the rotation angle of the motor sheave 41 per a predetermined length of the rope 2, increases as the rope 2 deteriorates and its diameter (radius) decreases.

  For example, when the rotation angle sensor 51 is a rotary encoder and outputs a pulse signal at predetermined angular intervals as a rotation detection signal, the deterioration index calculation unit 73 has a counter that accumulates pulses. In this case, the deterioration index calculation unit 73 acquires one position detection signal (hereinafter, referred to as a detection start signal) and then acquires a next position detection signal (hereinafter, referred to as a detection end signal). Until the pulse is integrated. When acquiring the integrated value of the pulse from the rotary encoder serving as the rotation angle sensor 51, the deterioration index calculating unit 73 calculates the sum of the integrated value at the time of acquiring the detection start signal and the integrated value at the time of acquiring the detection end signal. Calculate the difference value. Further, when reset is performed halfway, the deterioration index calculating unit 73 integrates the difference value up to the reset and the difference value after the reset.

For example, the radius of the motor sheave 41 is Rs, the initial value of the radius in the section where the rope 2 winds around the motor sheave 41 while the car 1 moves in the predetermined section is r0, and the car 1 is in the predetermined state after a predetermined time (when detection is performed). The radius of the rope 2 in the section where the rope 2 winds around the motor sheave 41 while moving in the section is r1, and the integrated value of the pulse output from the rotation angle sensor 51 as a rotary encoder while the car 1 moves in the predetermined section. The initial value is n0, the accumulated value of the pulse output from the rotation angle sensor 51 while the car 1 moves in the predetermined section after the lapse of a predetermined time (when the detection is performed) is n1, and the length (predetermined length) of the predetermined section is L, the following equation (1) holds.
L∝ (Rs + r0) × n0 = (Rs + r1) × n1 (1)

  Further, the deterioration index calculating unit 73 converts, for example, the position of the car 1 (hereinafter, referred to as a detection start position) corresponding to the detection start signal and the detection end signal from the data or the program stored in the storage unit 76. The position of the corresponding car 1 (hereinafter, referred to as a detection end position) can be acquired, and the movement distance of the car 1 between the detection start position and the detection end position can be calculated.

  In this case, the deterioration index calculating unit 73 can calculate the deterioration index as, for example, a value obtained by dividing the integrated value of the pulse by the moving distance of the car 1 or its reciprocal. The integrated value of the pulse is proportional to the rotation angle of the rotor 5a and the rotation angle of the motor sheave 41. The moving distance of the car 1 is a predetermined length of the rope 2. Therefore, the deterioration index is a value based on the rotation angle of the motor sheave 41 (sheave 4) corresponding to the predetermined length of the rope 2.

  The deterioration index calculation unit 73 can calculate a deterioration index for each part of the rope 2. For example, the deterioration index based on the integrated value of the pulse obtained while the car 1 moves from the first floor to the second floor or while the car 1 moves from the second floor to the first floor is such that the car 1 of the ropes 2 This is a deterioration index of a portion wound around the motor sheave 41 while moving between the floor and the second floor. The deterioration index based on the integrated value of the pulse obtained while the car 1 moves from the second floor to the third floor or while the car 1 moves from the third floor to the second floor is such that the car 1 of the ropes 2 This is a deterioration index of a portion wound around the motor sheave 41 when moving between the floor and the third floor.

  In this way, the deterioration index can be managed, for example, every time the car 1 moves on the first floor. In addition, when the moving distance of the first floor of the car 1 is the same for a plurality of floors, the deterioration index is calculated based on the integrated value of the pulse obtained while the car 1 moves between the adjacent floors. can do. In this case, the deterioration index may be a difference value (change amount) with respect to the integrated value (initial value) of the pulse at the beginning of the installation of the elevator 100. Not only in this case, but also when other physical quantities (parameters) are used as the deterioration index, the deterioration index may be a difference value with respect to the initial value, a ratio with respect to the initial value, or the like.

  FIG. 4 is a graph illustrating a correlation between the position of the car 1 and the detected value of the rotation angle (the integrated value of the pulses). The deterioration index in this case can be, for example, the slope (differential coefficient) of the graph. In this case, the rope 2 is wound around the motor sheave 41 corresponding to the section A (between the first and third floors) where the inclination of the graph in FIG. 4 is larger than the other sections. This means that the part where the rope 2 is degraded is more advanced than the other parts, that is, the diameter (radius) of the rope 2 is smaller and the rope 2 is more elongated.

  The deterioration determination unit 74 performs the deterioration determination by comparing the deterioration index with a threshold. In addition, the deterioration determination unit 74 may perform the deterioration determination by comparing a difference value with the initial value of the deterioration index and a ratio of the deterioration index to the initial value with a threshold value.

  Further, as described above, since the deterioration index calculating unit 73 can calculate the deterioration index for each part of the rope 2, the deterioration determining unit 74 can determine the deterioration for each part of the rope 2. That is, the deterioration determination unit 74 can specify a part of the rope 2 whose deterioration is more advanced than other parts. The deterioration determination unit 74 can also be referred to as a deterioration site identification unit.

  Note that it has been found that the rope 2 elongates as the radius of the rope 2 decreases, and that there is a correlation between the amount of change in the radius of the rope 2 and the elongation of the rope 2. Therefore, it is possible to calculate the radius of the rope 2, the amount of change in the radius, the elongation of the rope 2, and the like from the deterioration index. Further, the deterioration determination may be performed based on these values. In other words, the radius of the rope 2, the amount of change in the radius, and the elongation calculated from the detection value of the rotation angle sensor 51 may be used as a deterioration index.

  The output control unit 75 determines, by the deterioration determination unit 74, that at least a part of the rope 2 has the deterioration index equal to the threshold value or that the deterioration index exceeds the threshold value and the deterioration index is smaller than the state where the deterioration index is equal to the threshold value. When it is determined that the deterioration of No. 2 is progressing, a predetermined signal can be output. The output control unit 75 can control a communication unit (not shown) so that a notification signal or an alarm signal is transmitted to an external device or a management center via a communication network (not shown).

  Further, the deterioration index and the deterioration determination result may be recorded in the storage unit 76 for each part of the rope 2. In this case, the recording (history information) for each part of the rope 2 of the deterioration index and the deterioration determination result recorded in the storage unit 77 can be appropriately acquired from an external device or a management center via a communication network. Can be done. The storage unit 76 is, for example, a nonvolatile storage device such as an HDD or an SSD.

  As described above, in the present embodiment, the deterioration index calculation unit 73 calculates the deterioration index of the rope 2 based on the rotation angle of the sheave 4 corresponding to the predetermined length of the rope 2, and the deterioration determination unit 74 The deterioration of the rope 2 is determined based on the index. According to such a configuration, the deterioration of the rope 2 can be determined using the rotation angle of the sheave 4. Therefore, for example, it is possible to determine the deterioration of each part of the rope 2, it is possible to perform more precise deterioration determination in accordance with the number of pulses per rotation of the rotation angle sensor 51, or the rotation angle sensor 51 of the motor 5 is used. And at least one of various advantages such as being easily added to the elevator 100 equipped with In the present embodiment, the detected value of the rotation angle of the motor sheave 41 is used for calculating the deterioration index and determining the deterioration. However, the present invention is not limited to this. It may be used for calculation and deterioration determination. In this case, deterioration determination may be performed on a portion of the rope 2 that is wound around another sheave 4. Further, according to such a configuration, the configuration is easily simplified because a measurement mechanism using a laser beam or the like is not required.

  In the present embodiment, for example, the predetermined length of the rope 2 is obtained from the detection value of the position sensor 6 (sensor) that detects the position of the car 1. According to such a configuration, the deterioration of the rope 2 can be determined using the detection result of the position of the car 1. Therefore, for example, there is obtained an advantage that it can be more easily applied to the elevator 100 equipped with the position sensor 6 of the car 1.

  In the present embodiment, for example, the predetermined length of the rope 2 is a length that the car 1 moves between predetermined floors. According to such a configuration, the deterioration index of the rope 2 can be more easily calculated using the length between the floors of the car 1. For example, therefore, for example, an advantage is obtained that the present invention can be more easily applied to an elevator 100 equipped with a landing sensor as the position sensor 6 of the car 1.

  In the present embodiment, for example, the deterioration determination unit 74 determines deterioration for each part of the rope 2. According to such a configuration, for example, the life of the rope 2 can be determined with higher accuracy.

  Further, in the present embodiment, for example, the deterioration determining unit 74 specifies a part of the rope 2 that has deteriorated more than other parts. According to such a configuration, for example, the life of the rope 2 can be determined with higher accuracy based on the state of the part where deterioration has progressed further.

  In the present embodiment, for example, the deterioration determination unit 74 may determine the deterioration based on a difference between the deterioration index and the initial value of the deterioration index. According to such a configuration, for example, the initial value of the deterioration index is 0 (zero), so that the degree of deterioration can be easily understood.

  As mentioned above, although the embodiment of the present invention was illustrated, the above-mentioned embodiment is an example and is not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. These embodiments are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents. Further, the configuration and shape of each embodiment and each modified example can be partially replaced and implemented. The specifications (structure, type, direction, type, size, length, width, thickness, height, number, arrangement, position, material, etc.) of each configuration and shape are appropriately changed and implemented. can do.

  DESCRIPTION OF SYMBOLS 1 ... Basket, 2 ... Rope, 3 ... Weight, 4 ... Sheave, 6 ... Position sensor (sensor), 7 ... Elevator inspection device, 73 ... Deterioration index calculation part, 74 ... Deterioration determination part, 75 ... Output control part.

The elevator inspection device of the embodiment is a deterioration index calculation unit that calculates a deterioration index of the rope based on the rotation angle of the sheave corresponding to a predetermined length of the rope, a deterioration determination unit that determines the deterioration of the rope based on the deterioration index, Is provided. The predetermined length of the rope is a length that the car moves between predetermined floors, and is obtained from a detection value of a landing sensor that detects a position of the car or the weight. The rope has a plurality of portions each corresponding to a predetermined floor and being wound around the sheave while moving between the predetermined floors. The deterioration determination unit determines the deterioration for each of the plurality of parts, and specifies, from all of the plurality of parts, a part that has deteriorated more than other parts.

In the present embodiment, for example, the predetermined length of the rope 2 is a length that the car 1 moves between predetermined floors. According to such a configuration, the deterioration index of the rope 2 can be more easily calculated using the length between the floors of the car 1. Therefore , for example, there is obtained an advantage that it can be more easily applied to the elevator 100 equipped with the landing sensor as the position sensor 6 of the car 1.

As mentioned above, although the embodiment of the present invention was illustrated, the above-mentioned embodiment is an example and is not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. These embodiments are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents. Further, the configuration and shape of each embodiment and each modified example can be partially replaced and implemented. In addition, the specifications (structure, type, direction, type, size, length, width, thickness, height, number, arrangement, position, material, etc.) of each configuration and shape are appropriately changed and implemented. can do.
The contents of the claims at the time of filing are appended below.
[1]
A deterioration index calculation unit that calculates a deterioration index of the rope based on a rotation angle of the sheave corresponding to a predetermined length of the rope,
A deterioration determination unit that determines deterioration of the rope based on the deterioration index;
An elevator inspection device comprising:
[2]
The elevator inspection device according to [1], wherein the predetermined length of the rope is obtained from a detection value of a sensor that detects a position of a car or a weight.
[3]
The elevator inspection device according to [1] or [2], wherein the predetermined length of the rope is a length that the car moves between predetermined floors.
[4]
The elevator inspection device according to any one of [1] to [3], wherein the deterioration determination unit determines deterioration for each part of the rope.
[5]
The elevator inspection device according to any one of [1] to [4], wherein the deterioration determination unit specifies a part of the rope that has deteriorated more than other parts.
[6]
The elevator inspection device according to any one of [1] to [5], wherein the deterioration determination unit determines the deterioration by comparing the deterioration index with a threshold.

Claims (6)

A deterioration index calculating unit that calculates a deterioration index of the rope based on a rotation angle of the sheave corresponding to a predetermined length of the rope,
A deterioration determination unit that determines deterioration of the rope based on the deterioration index;
An elevator inspection device comprising:   The elevator inspection device according to claim 1, wherein the predetermined length of the rope is obtained from a detection value of a sensor that detects a position of a car or a weight.   The elevator inspection apparatus according to claim 1, wherein the predetermined length of the rope is a length that the car moves between predetermined floors.   The elevator inspection device according to any one of claims 1 to 3, wherein the deterioration determination unit determines deterioration for each part of the rope.   The elevator inspection device according to any one of claims 1 to 4, wherein the deterioration determination unit specifies a part of the rope that has deteriorated more than other parts.   The elevator inspection device according to any one of claims 1 to 5, wherein the deterioration determination unit determines the deterioration by comparing the deterioration index with a threshold.

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