JP5345595B2 - Diagnostic device for elevator drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnostic device of an elevator driving device capable of identifying easily damaged portions on a main rope produced by making contact with a sheave by a large load in attrition anomaly positions of a sheave groove. <P>SOLUTION: The diagnostic device of the elevator driving device includes a main rope load position identifying means 38 identifying a portion large load among bent portions winding around each of the sheave groove 26a of main rope 6a on the basis of the signal output from a rotary encoder 14 an attrition anomaly position identifying means 29 identifying the attrition anomaly portions of sheave groove 26a of a sheave 3 and the portion of the main rope 6a making contact with the sheave groove 26a in the attrition anomaly position on the basis of the signal output from a laser displacement sensor 19, and a rope damage position identifying means 43 identifying damage positions of the main rope 6a based on the portion of the main rope 6a identified by the main rope load position identifying means 38 and the portion of main rope 6a identified by the attrition anomaly position identifying means 29. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a diagnosis device for an elevator driving device that is provided in an elevator and diagnoses a driving device for a car including a sheave and a main rope wound around the sheave.

  FIG. 5 is a diagram showing a configuration of a general rope-type elevator provided with a drive device targeted by the present invention.

  As shown in FIG. 5, the rope type elevator includes a traction machine 1 provided in a machine room 12 disposed at the upper part of the hoistway 13. The traction machine 1 includes a drive mechanism 2 composed of a motor and a speed reducer. A main rope 6 having one end connected to the car 7 and the other end connected to the counterweight 11 is wound around the sheave 3 and the deflector wheel 4. The drive mechanism 2, sheave 3, and deflector 4 described above are held by a machine beam 5 installed in the machine room 12.

  The main rope 6 is composed of a plurality of ropes, and the sheave 3 is provided with a plurality of sheave grooves around which the main ropes 6 are wound.

  Each of the main ropes 6 and the car 7 are connected by a rope socket 8a, a thimble rod 9a, and a spring 10a engaged with the thimble rod 9a. Similarly, each of the main ropes 6 and the counterweight 11 are connected by a rope socket 8b, a thimble rod 9b, and a spring 10b engaged with the thimble rod 9b.

  The car 7 can be raised and lowered in the hoistway 13 by winding and lowering each of the main ropes 6 via the sheave 3 by the drive mechanism 2.

  By the way, each of the sheave grooves of the sheave 3 described above wears with time due to friction with each of the main ropes 6. If the degree of wear becomes uneven wear on the entire circumferential surface of the sheave groove, the feed amount of the plurality of main ropes 6 will vary when the car 7 is operated. Further, the tension of the plurality of main ropes 6 also varies. If these tension variations of the plurality of main ropes are left unattended, uneven wear of the sheave grooves of the sheave 3 may be promoted, the life of the plurality of main ropes 6 may be reduced, or the strands may be broken. is there. For this reason, it is necessary to properly diagnose and manage the uneven wear state of the sheave groove of the sheave 3.

  FIG. 6 is a diagram illustrating a conventional diagnostic apparatus for an elevator drive apparatus. FIG. 6 is disclosed in Patent Document 1 and is intended to manage the uneven wear state. This prior art rotates the sheave 3 to move the position data of the position sensor 30 that measures the positions of specific portions of the sheave grooves 26 a to 26 d of the sheave 3, and moves the position sensor 30 along the central axis direction of the sheave 3. The driving data of the axial direction moving means 31 to be measured and the rotation angle data of the rotation angle detecting means 32 for detecting the rotation angle of the sheave 3 are simultaneously measured and stored. The measurement / storage operation is repeatedly performed by rotating the sheave 3 one or more times. Thereafter, the cross-sectional shapes of the sheave grooves 26a to 26d of the sheave 3 are calculated from the stored position data, drive data, and rotation angle data. That is, the wear amount of the sheave grooves 26a to 26d of the sheave 3 is calculated.

JP 2009-198198 A

  Although the above-described prior art can measure the shape of the sheave grooves 26a to 26d of the sheave 3, that is, the amount of wear, the plurality of the ropes may cause a serious accident such as a decrease in the life of the plurality of main ropes or the strand breakage. It is difficult to specify the portion of the main rope 6 where the load is most applied, that is, the portion of the main rope 6 that is damaged by contacting the sheave 3 with a large load at the uneven wear position of the sheave grooves 26a to 26d. It was.

  The present invention has been made from the above-described prior art, and its purpose is to easily identify the site of damage to the main rope caused by contact with the sheave with a large load at the uneven wear position of the sheave groove. An object of the present invention is to provide a diagnostic apparatus for an elevator drive device that can be used.

  In order to achieve the above object, a diagnostic apparatus for an elevator drive apparatus according to the present invention includes a plurality of main ropes that are provided in an elevator and travel a car, and a plurality of sheave grooves around which the main ropes are wound. An elevator drive apparatus diagnosis apparatus for diagnosing a drive apparatus including a sheave having a rotary shaft, and calculating a position of the car based on a rotary encoder that rotates in synchronization with the sheave and a signal output from the rotary encoder A position calculation unit, a speed calculation unit for calculating the speed of the car based on a signal output from the rotary encoder, position information output from the position calculation unit, and speed information output from the speed calculation unit Based on the above, a portion to which a large load is applied among bending portions wound around each sheave groove of the main rope is specified. Main rope load position specifying means, a laser displacement sensor for measuring the wear amount of each of the plurality of sheave grooves of the sheave, an electric slider for moving the laser displacement sensor in the axial direction of the sheave, and the electric slider Based on a signal output from the rotary encoder, a signal output from the laser displacement sensor, and a signal output from the electric slider control means. Specified by an uneven wear position having a large wear amount in each sheave groove, an uneven wear position specifying means for specifying the portion of the main rope that contacts the sheave groove at the uneven wear position, and the main rope load position specifying means. Of the bending part of each main rope, the part to which a large load is applied and specified by the uneven wear position specifying means And a rope damage position specifying means for specifying a damage position of each of the main ropes based on a portion of the main rope contacting the sheave groove at an uneven wear position where the wear amount of each sheave groove is large. It is a feature.

  In the rope type elevator targeted by the present invention, when the car is run, the car is in steady running from the acceleration state with respect to the bending portion of the main rope wound around the sheave groove of the sheave. A large load is applied at the speed shift point at which the vehicle shifts to, and at the speed shift point at which the vehicle travels from the steady running to the deceleration state. From this, the present invention is based on the position information of the car output from the position calculation unit and the speed information of the car output from the speed calculation unit. Of the main rope portions that are connected and wound around the sheave groove of the sheave and bent, it is possible to identify the main rope portion where the load increases.

  Further, according to the present invention, the wear amount of each sheave groove can be measured by driving the rotary encoder, the laser displacement sensor, and the electric slider, and the sheave groove causing the wear and the wear of the corresponding sheave groove are generated. Can be specified. In addition, it is possible to identify the portion of the main rope that comes into contact with the worn portion of the sheave groove. That is, the uneven wear position specifying means can specify the uneven wear position where the wear amount of each sheave groove is large and the portion of the main rope that is in contact with the portion of the sheave groove where uneven wear occurs.

  And this invention produces the part of the main rope to which the large load specified by the main rope load position specifying means is applied by the main rope damage position specifying means, and the uneven wear specified by the uneven wear position specifying means. The main rope portion that is in contact with the portion of the sheave groove that is in contact is collated, and the matching main rope portion can be identified as the damage position of the main rope. That is, the present invention includes the main rope load position specifying means, the uneven wear position specifying means, and the main rope damage position specifying means, and is caused by contacting the sheave groove with a large load at the uneven wear position of the sheave groove. The site of damage to the main rope can be easily identified.

  According to the present invention, in the invention, the uneven wear position specifying means includes a signal output from the rotary encoder, a signal output from the laser displacement sensor, and a signal output from the electric slider control means. Based on the signal synthesizing means to be synthesized, and the signal synthesized by the signal synthesizing means, the shape measurement data associated with the wear of each of the plurality of sheave grooves of the sheave and the contact with the worn sheave groove portion A data recording means for recording a portion of the main rope, a shape measurement data associated with wear of each of the sheave grooves of the sheave recorded by the data recording means, and an initial sheave groove shape data, The uneven wear position causing the maximum wear amount of each of the plurality of sheave grooves of the sheave is specified and recorded by the data recording means. Of sites of the main ropes that are, is characterized by the irregular abrasion position occurring respective maximum wear amount and a comparison means for identifying a portion of the main rope in contact with the sheave grooves.

  Further, in the present invention according to the above invention, the uneven wear position specifying means may be configured such that the wear amount at the uneven wear position where the maximum wear amount of each of the plurality of sheave grooves of the sheave specified by the comparing means is determined in advance. It includes a determining means for determining whether or not the set sheave groove is not less than a reference wear amount required.

  In the present invention, the main rope damage position specifying means collates the main rope part specified by the main rope load position specifying means with the main rope part specified by the uneven wear position specifying means, and matches the main ropes. This part can be easily identified as the part of the main rope damaged by contact with the sheave with a large load at the uneven wear position of the sheave groove. As a result, it is possible to easily diagnose a drop in the life of the main rope or a strand break, which has been difficult in the past, and an early response according to the wear state of the main rope is possible.

It is a block diagram showing one embodiment of a diagnostic device of an elevator drive device concerning the present invention. It is a front view which shows the sheave contained in the drive device made into the diagnosis object by this invention. It is AA sectional drawing of FIG. It is a figure which shows the speed characteristic of the elevator car provided with the drive device made into the diagnosis object by this invention. It is a figure which shows the structure of the general rope type elevator with which the drive device which this invention makes object is provided. It is a figure which shows the diagnostic apparatus of the conventional elevator drive device.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an elevator drive apparatus diagnosis apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a diagnostic apparatus for an elevator drive apparatus according to the present invention, FIG. 2 is a front view showing a sheave included in a drive apparatus targeted for diagnosis by the present invention, and FIG. FIG. 4 is a cross-sectional view of FIG. 4A, and FIG. 4 is a diagram showing the speed characteristics of an elevator car provided with a drive device to be diagnosed by the present invention.

  The elevator according to the present embodiment is a rope-type elevator. As shown in FIG. 1, the rope-type elevator has a sheave 3 having a plurality of sheave grooves fixed on a machine beam 5. A plurality of main ropes 6 are wound around. Moreover, the baffle 4 which positions the main rope 6 so that it may spread outward is also provided. One end of each of the main ropes 6 is connected to the car 7 and the other end is connected to the counterweight 6. The sheave 3 and the main rope 6 described above are included in the driving device for the car 7.

  As shown in FIG. 2, the machine beam 5 is provided with a rope cover 15 for preventing contact with a plurality of main ropes 6 so as to cover each of the main ropes 6. A pair of opposing magnet bases 16 are attached to the rope cover 15 by magnetic force. The sheave 3 has a plurality of sheave grooves 26a to 26h as described above. The main ropes 6a to 6h are wound around the sheave grooves 26a to 26h, respectively.

  As shown in FIG. 1, the diagnostic apparatus for an elevator drive apparatus according to this embodiment is based on a rotary encoder 14 that rotates in synchronization with the sheave 3 and detects a rotation angle, and a signal output from the rotary encoder 14. A position calculator 34 for calculating the position of the car 7 in the hoistway, and a speed calculator 36 for calculating the speed of the car 7 based on a signal output from the rotary encoder 14.

  Further, based on the position information 35 output from the position calculation unit 34 and the speed information 37 output from the speed calculation unit 36, the portions of the portions wound around the sheave grooves 6 a to 6 h of the main ropes 6 a to 6 h are also described. Main rope load position specifying means 38 for specifying a portion to which a large load is applied is provided.

  FIG. 4 shows the speed characteristics of the car 7. In FIG. 4, the horizontal axis indicates time t and the vertical axis indicates speed v. When the car 7 travels, the bending portions of the main ropes 6a to 6h wound around the sheave grooves 26a to 26h of the sheave 3 change the speed at which the car 7 moves from the acceleration state 39 to the steady travel 41. A large load is applied at the station 40a and the speed changing station 40b that shifts from the steady running 41 to the deceleration state 42. From this, the main rope load position specifying means 30 described above is applied to the car 7 based on the position information of the car 7 output from the position calculating unit 34 and the speed information output from the speed calculating unit 36. Of the portions of the main ropes 6a to 6h that are connected and wound around the sheave grooves 26a to 26h of the sheave 3, the portions of the main ropes 6a to 6h that increase the load can be specified.

  Further, in the present embodiment, as shown in FIG. 1, a laser displacement sensor 19 that measures the wear amount of each of the plurality of sheave grooves 26 a to 26 h of the sheave 3, and this laser displacement sensor 19 is moved in the axial direction of the sheave 3. And an electric slider control means 22 for controlling the driving of the electric slider 18. A pair of brackets 17 that determine the position of the laser displacement sensor 19 in the direction of the sheave 3 are attached to the magnet base 16 to face each other. An electric slider 18 is fixed to the bracket 17, and a laser displacement sensor 19 is movably held on the sheave 3 side of the electric slider 18.

  In the present embodiment, as shown in FIG. 1, the sheave 3 is based on a signal output from the rotary encoder 14, a signal output from the laser displacement sensor 19, and a signal output from the electric slider control means 22. There is provided a partial wear position specifying means 29 for specifying a portion of the main ropes 6a to 6h that contacts the sheave grooves 26a to 26h at the uneven wear position. ing.

  The uneven wear position specifying means 29 includes a signal combining means 21 for combining a signal output from the rotary encoder 14, a signal output from the laser displacement sensor 19, and a signal output from the electric slider control means 22. It is out. Further, the uneven wear position specifying means 29 is based on the signal synthesized by the signal synthesizing means 21, and the shape measurement data associated with the wear of the sheave grooves 26a to 26h of the sheave 3 and the worn sheave grooves 26a to 26a. The data recording means 23 which records the site | parts of the main ropes 6a-6h which contact the site | part of 26h is included. Further, the uneven wear position specifying means 29 compares the shape measurement data associated with the wear of each of the sheave grooves 26a to 26h of the sheave 3 recorded by the data recording means 23 with the initial sheave groove shape data. In addition to specifying the partial wear position where the maximum wear amount of each of the sheave grooves 26a to 26h is generated, the maximum wear amount among the portions of the main ropes 6a to 6h recorded by the data recording means 23 is generated. Comparing means 24 for specifying the portions of the main ropes 6a to 6h that are in contact with the sheave grooves 26a to 26h at the uneven wear position is included.

  FIG. 3 shows a worn state of the sheave groove 26 a of the sheave 3. As shown in FIG. 3, for example, the sheave groove 26 a of the sheave 3 includes an initial sheave groove shape portion 26 that is not worn, a wear sheave groove shape portion 27 that is worn, and a maximum wear sheave groove shape portion 28. And have. Regarding the first sheave groove 26a of the sheave 3, for example, in the comparison means 24 of the above-mentioned uneven wear position specifying means 29, the uneven wear position that is the position of the maximum wear sheave groove shape portion 28 and the sheave groove at this uneven wear position. The part of the main rope 6a which contacts 26a is specified.

  Further, the uneven wear position specifying means 29 is a repair of the sheave groove in which the wear amount at the uneven wear position where the maximum wear amount of each of the sheave grooves 26a to 26h of the sheave 3 specified by the comparison means 24 is generated is set in advance. The determination means 25 which determines whether it is more than the reference | standard wear amount for which cutting is required is included.

  Further, in the present embodiment, as shown in FIG. 1, the portion to which a large load is applied among the bending portions of the main ropes 6 a to 6 h specified by the main rope load position specifying means 38, and the uneven wear position specifying means 29. The damage position of each of the main ropes 6a to 6h is determined based on the portion of the main ropes 6a to 6h that contacts the sheave grooves 26a to 26h at the uneven wear position where the wear amount of each of the sheave grooves 26a to 26h specified in (2) is large. Rope damage position specifying means 43 for specifying is provided.

  In the present embodiment configured as described above, the damage positions of the main ropes 6a to 6h are grasped as follows.

  For example, when the damage position of the main rope 6a wound around the first sheave groove 26a is specified, the electric slider 18 can be controlled by the electric slider control means 22, and the laser displacement sensor 19 can measure the first sheave groove 26a. Move to the correct position. At this time, a signal of the movement distance of the laser displacement sensor 19 is output from the electric slider control means 22 to the signal synthesis means 21.

  In this state, the sheave 3 is rotated to drive the car 7 at a low speed, the laser displacement sensor 19 is irradiated with the laser beam 20, and the sheave 3 is rotated one or more times to form the groove shape (amount of wear) of the first sheave groove 26a. Is measured over the entire circumference of the first sheave groove 26a. At this time, a signal of the rotation angle from the rotary encoder 14 that rotates as the sheave 3 rotates is output to the signal synthesis unit 21.

  At this time, since the rotational movement distance of the sheave 3 is detected by the rotary encoder 19, the measurement start time and the measurement end in the circumferential direction of the first sheave groove 26a are detected by the irradiation signal of the laser beam 20 from the laser displacement sensor 19. The time is detected.

  With such measurement, the wear sheave groove shape portion 27 shown in FIG. 3 is detected for the first sheave groove 26a, and is in contact with the wear sheave groove shape portion 27 based on the signal from the rotary encoder 19. The site | part of the main rope 6a is detected. Further, the maximum wear sheave groove shape portion 28 is detected, and the portion of the main rope 6 a that is in contact with the maximum wear sheave groove shape portion 28 is also detected based on a signal from the rotary encoder 19. These detection data are transmitted from the signal synthesizing unit 21 to the data recording unit 23 and recorded in the data recording unit 23.

  Thereafter, the position of the laser displacement sensor 19 is moved, the measurement from the second sheave groove 26b to the eighth sheave groove 26h is performed in the same manner, and the obtained data is recorded in the data recording means 23.

  Next, the comparison means 24 compares the shape measurement data associated with the wear of the sheave grooves 26a to 26h of the sheave 3 recorded by the data recording means 23 with the initial sheave groove shape data, and the sheave grooves 26a to 26h. While specifying the uneven wear position where each maximum wear amount is generated, at the uneven wear position where each maximum wear amount is generated among the main ropes 6 a to 6 h recorded by the data recording means 23. The site | parts of the main ropes 6a-6h which contact the sheave grooves 6a-6h are specified. For example, in the first sheave groove 26a, an uneven wear position that is the position of the maximum wear sheave groove shape portion 28 shown in FIG. 3 is specified, and the portion of the main rope 6a that contacts the sheave groove 6a at this uneven wear position. Is identified.

  Next, in the determination means 25, the sheave groove whose amount of wear at the partial wear position where the maximum wear amount of each of the sheave grooves 26a to 26h of the sheave 3 specified by the comparison means 24 is generated is repaired in advance. It is determined whether or not the required standard wear amount is exceeded. Regarding the first sheave groove 26a, it is determined whether or not the wear amount in the maximum wear sheave groove shape portion 28 is equal to or greater than the reference wear amount.

  Finally, in the rope damage position specifying means 43, each portion of the main ropes 6 a to 6 h to which the large load specified by the main rope load position specifying means 38 is applied and specified by the uneven wear position specifying means 29. The portions of the main ropes 6a to 6h that are in contact with the portions of the sheave grooves 26a to 26h causing the maximum wear amount are collated, and the matching portions of the main ropes 6a to 6h are damaged to the main ropes 6a to 6h. Identified as position.

  According to the present embodiment configured as described above, in the comparison means 24 of the uneven wear position specifying means 29, the amount of wear occurring in each of the sheave grooves 26a to 26h of the sheave 3 and the sheave where the wear amount is generated. The positions on the grooves 26a to 26h can be easily grasped, and the progress of wear of the sheave 3 can be reliably managed.

  Further, in the determination means 25 of the uneven wear position specifying means 29, it is possible to easily diagnose whether each of the sheave grooves 26a to 26h has reached a state that requires repair.

  In particular, the rope damage position specifying means 43 makes contact with each of these sheave grooves 26a to 26h with a large load at the uneven wear position corresponding to each maximum wear amount of the sheave grooves 26a to 26h of the sheave 3. The site | part of the damage of the main ropes 6a-6h which arises can be specified easily. As a result, the life of the main ropes 6a to 6h can be easily diagnosed and the strand breakage can be easily diagnosed, and an early response according to the worn state of the main ropes 6a to 6h is possible.

3 Sheave 6 Main rope 6a 1st main rope 6b 2nd main rope 6c 3rd main rope 6d 4th main rope 6e 5th main rope 6f 6th main rope 6g 7th main rope 6h 8th main rope 7 Passenger car 14 Rotary Encoder 18 Electric slider 19 Laser displacement sensor 21 Signal synthesizing means 22 Electric slider control means 23 Data recording means 24 Comparison means 25 Determination means 26 Initial sheave groove shape portion 26a 1st sheave groove 26b 2nd sheave groove 26c 3rd sheave groove 26d 4 No. sheave groove 26e No. 5 sheave groove 26f No. 6 sheave groove 26g No. 7 sheave groove 26h No. 8 sheave groove 27 Wear sheave groove shape portion 28 Maximum wear sheave groove shape portion 29 Uneven wear position specifying means 34 Position calculation portion 35 Position information 36 Speed calculation part 37 Speed information 38 Main rope load position specifying means 40a Speed Degree change point 40b Speed change point 43 Rope damage position identification means

Claims (3)

In an elevator drive apparatus diagnosis apparatus for diagnosing a drive apparatus that is provided in an elevator and that includes a plurality of main ropes that travel a car and a sheave having a plurality of sheave grooves around which the main ropes are wound,
A rotary encoder that rotates in synchronization with the sheave; a position calculator that calculates the position of the car based on a signal output from the rotary encoder; and the car based on a signal output from the rotary encoder. A speed calculator for calculating the speed of
Based on the position information output from the position calculation unit and the speed information output from the speed calculation unit, a large load is applied to the bending portion wound around each sheave groove of the main rope. Main rope load position specifying means for specifying the site;
A laser displacement sensor that measures the amount of wear of each of the plurality of sheave grooves of the sheave, an electric slider that moves the laser displacement sensor in the axial direction of the sheave, and an electric slider control means that controls the electric slider;
Based on the signal output from the rotary encoder, the signal output from the laser displacement sensor, and the signal output from the electric slider control means, the deviation of the wear amount of each of the plurality of sheave grooves of the sheave is large. A partial wear position specifying means for specifying a wear position and a portion of the main rope that contacts the sheave groove at the partial wear position;
At a portion where a large load is applied among the bending portions of each of the main ropes specified by the main rope load position specifying means, and at an uneven wear position where the wear amount of each sheave groove specified by the uneven wear position specifying means is large. An elevator drive diagnostic apparatus comprising: a rope damage position specifying means for specifying a damage position of each of the main ropes based on a portion of the main rope contacting the sheave groove. In the diagnostic apparatus of the elevator drive device according to claim 1,
The uneven wear position specifying means includes
Signal combining means for combining the signal output from the rotary encoder, the signal output from the laser displacement sensor, and the signal output from the electric slider control means;
Based on the signal synthesized by the signal synthesizing means, the shape measurement data associated with the wear of each of the plurality of sheave grooves of the sheave and the portion of the main rope in contact with the worn sheave groove portion are recorded. Data recording means for
The shape measurement data associated with the wear of each of the plurality of sheave grooves of the sheave recorded by the data recording means is compared with the initial sheave groove shape data, and the maximum wear amount of each of the plurality of sheave grooves of the sheave And the main rope which contacts the sheave groove at the partial wear position where the maximum wear amount is generated among the main rope portions recorded by the data recording means. A diagnostic device for an elevator drive apparatus, comprising: comparing means for specifying a part of the elevator drive apparatus. In the diagnosis apparatus of the elevator drive device according to claim 2,
The uneven wear position specifying means includes
The wear amount at the partial wear position where the maximum wear amount of each of the plurality of sheave grooves of the sheave specified by the comparison means is equal to or greater than a reference wear amount that requires a preset sheave groove repair. A diagnosis device for an elevator drive apparatus, comprising: a determination means for determining whether or not

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