JP2017061368A - Rope tension measurement apparatus, elevator device and rope tension measurement method of elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable measurement of rope tension at all times even when there are many ropes that are used.SOLUTION: A rope tension measurement apparatus includes: a guide pulley which follows movement of a rope; a guide pulley shaft support bracket which supports the guide pulley in a rotatable manner; a spring rod which has one end supported slidably to the guide pulley shaft support bracket and the other end supported rotatably to a fixing metal fitting fixed to a fixation member and is provided with a spring; an acceleration sensor which is installed in the guide pulley shaft support bracket and measures the vibration of the rope; and a vibration frequency processing device which receives vibration information of the rope measured by the acceleration sensor, analyzes the vibration information of the rope and determines whether or not the tension state of the rope is abnormal.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rope tension measuring device, an elevator device, and a rope tension measuring method for an elevator device, and in particular, a rope tension measuring device suitable for constantly measuring the tension in a plurality of main ropes that drive an elevator car up and down. The present invention also relates to an elevator apparatus and a rope tension measuring method for the elevator apparatus.

  In general, in an elevator of a type in which a machine room is not provided above the elevator hoistway installed in a building, both ends of the main rope are fixed and a plurality of main ropes located between sheaves (pulleys and sheaves) Is installed from one end to the other end via a car lower pulley, a car side top pulley, a hoist sheave, a counter weight side top pulley and a counter weight pulley. Are driven to move the plurality of main ropes located between the pulleys and sheaves described above, thereby raising and lowering the elevator car.

  In such an elevator, it is ideal that the same amount of tension acts on the multiple main ropes that drive the car up and down, and when the main rope tension becomes unbalanced, some main ropes Since excessive tension acts, this causes wear of the main rope and abnormal wear such as uneven wear on the hoisting sheaves or the grooves of each sheave. The problem of shortening occurs.

  Normally, the main rope tension is measured by the worker. However, the conventional method of measuring the main rope tension has a large error because the tension spring length of the main rope end is visually measured. There is a problem that causes a difference.

  Patent Document 1 discloses a rope tension measuring device that measures tensions acting on a plurality of main ropes that suspend an elevator car.

  The rope tension measuring device described in Patent Document 1 is equipped with a vibration sensor that is attached to each main rope and detects the natural frequency of each main rope, and each main rope based on the output signal of this vibration sensor. And an arithmetic processing circuit that calculates the tension. By manually applying vibration force to each main rope, the output signal from the vibration sensor is supplied to the arithmetic processing circuit, and the main processing line calculates the main rope tension. Because it is a device characterized by a calculation method that does not include the length of the main rope as a variable, the rope tension can be measured easily and accurately with the car stopped at an arbitrary position. It is described.

JP 2013-217891 A

  However, in the above-described prior art (Patent Document 1), a vibration sensor is installed on each main rope each time, and each main rope is measured by artificially applying a vibration force. Since it is necessary to measure when the number of ropes used is large or at all dropping positions of each main rope, it takes a lot of time to replace and measure the vibration sensor, and it cannot be permanently installed in the structure of Patent Document 1. .

  The present invention has been made in view of the above points, and the object of the present invention is to provide a rope tension measuring device, an elevator device, and an elevator device that can always measure the rope tension even when the number of ropes used is large. It is to provide a rope tension measuring method.

  In order to achieve the above object, the rope tension measuring device of the present invention includes a guide pulley that follows the movement of the rope, a guide pulley shaft support bracket that rotatably supports the guide pulley, and the guide pulley shaft support bracket. One end is slidably supported, the other end is rotatably supported by a fixture that is fixed to a fixing member, a spring is installed on the spring, and the guide pulley shaft support bracket is installed on the rope. An acceleration sensor that measures the vibration of the rope, and a vibration frequency processing device that receives vibration information of the rope measured by the acceleration sensor and determines whether or not the tension state of the rope is abnormal by analyzing the vibration information of the rope It is characterized by having.

  Further, in order to achieve the above object, the elevator apparatus of the present invention has a rope fixed at both ends, the first and second car lower pulleys, the car side top pulley, the hoisting machine sheave from one end side, It is installed on the other end side via a counterweight side top pulley and a counterweight pulley, and the hoisting machine sheave is driven to rotate by a hoisting machine to move the rope to raise and lower the car, and the rope In an elevator apparatus equipped with a rope tension measuring device for measuring the tension of the rope tension, the rope tension measuring device is a rope tension measuring device configured as described above.

  Furthermore, in the rope tension measuring method for an elevator apparatus according to the present invention, in order to achieve the above object, the ropes fixed at both ends are connected to the first and second car lower pulleys, the car side top pulleys from one end side, The hoisting machine sheave, the counterweight side top pulley and the counterweight pulley are installed on the other end side, and the hoisting machine sheave is driven to rotate by the hoisting machine to move the rope to move the car up and down. In the elevator device rope tension measuring method for measuring the rope tension of the elevator device using a rope tension measuring device, the rope tension measuring device is the rope tension measuring device having the above-described configuration, and is measured by the acceleration sensor. The rope vibration information received is received and the rope vibration information is Tension state of the rope by analyzing the number processing device and judging whether abnormal or not.

  According to the present invention, it is possible to always measure the rope tension even when the number of ropes used is large.

It is a figure which shows schematic structure of the elevator apparatus with which Example 1 of the rope tension measuring device of this invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows Example 1 of the rope tension measuring device of this invention in a partial cross section. It is a figure for demonstrating the principle of the detection method of the rope abrasion or the winding machine sheave or the partial wear of a pulley groove from the change of the rope tension measured value by one Example of the rope tension measuring method of the elevator apparatus of this invention. It is a block diagram which shows one Example of the elevator apparatus provided with the rope tension measuring apparatus of this invention.

  Hereinafter, the rope tension measuring device, the elevator device, and the rope tension measuring method of the elevator device according to the present invention will be described based on the illustrated embodiments.

  FIG. 1 shows a schematic configuration of an elevator apparatus to which a first embodiment of the rope tension measuring apparatus of the present invention is applied.

  As shown in FIG. 1, in the elevator apparatus, the main rope 6 having both ends fixed is from one end side of the car side rope end 6b1 to the first and second car lower pulleys 4a1 and 4a2, the car side. The top pulley 4c1, the hoisting machine sheave 5, the counterweight side top pulley 4c2 and the counterweight pulley 4b are installed on the counterweight side rope end 6b2 which is the other end side. Is driven to rotate and move the main rope 6 to raise and lower the car 1.

  Specifically, a first car lower pulley 4a1, a second car lower pulley 4a2 attached to the car 1, a counter weight pulley 4b attached to the counterweight 2, and a ride installed on the top of a hoistway (not shown). A plurality of main ropes 6 are wound around the car-side top pulley 4c1, the counterweight-side top pulley 4c2 and the hoisting machine sheave 5 connected to the hoisting machine 3, and the plurality of main ropes 6 and the car 1 The counterweight 2 is suspended, and the car 1 is driven up and down by rotating the hoisting machine sheave 5 by the hoisting machine 3.

  FIG. 2 shows a first embodiment of a rope tension measuring device employed in the elevator device shown in FIG.

  As shown in the figure, the rope tension measuring device of the present embodiment includes a guide pulley 9a that follows the movement of the main rope 6, a guide pulley shaft support bracket 9b that rotatably supports the guide pulley 9a, and the guide pulley. One end of the pulley shaft support bracket 9b is slidably supported, and the other end is pivoted to a fixture 11c that is fixed to a hoistway tower device (for example, a rail of the counterweight 2) that is a fixing member. A spring rod 10a that is freely supported and provided with a spring 10b, an acceleration sensor 8a that is installed on a guide pulley shaft support bracket 9b and that measures vibration of the main rope 6, and a main rope 6 that is measured by the acceleration sensor 8a Of the main rope 6 received by the wireless communication receiving unit 12 and the wireless communication receiving unit 12 that receives the vibration information of Dynamic information is transmitted, and the vibration information of the main rope 6 transmitted is analyzed to determine whether the tension state of the main rope 6 is abnormal. When the tension state of 6 is determined to be abnormal, the alarming device 14 transmits a notification of the abnormality.

  Further, a member 10f1 having a through hole 10f2 in the axial direction is installed at the end of the guide pulley shaft support bracket 9b opposite to the side on which the guide pulley 9a is supported, and the member 10f1 has a through hole 10f2. One end of the spring rod 10a is slidably inserted, and the fixture 11c includes a bearing portion 11a. The other end of the spring rod 10a is rotatably mounted via a support pin 11b. ing.

  In FIG. 2, the vibration information of the main rope 6 is transmitted to the vibration frequency processing device 13 via the wireless communication 8b. However, the vibration information may be transmitted by wired communication. In the case of wireless communication, there is an advantage that the degree of freedom of installation of each rope tension measuring device is increased, and in the case of wired communication, there is an advantage that the stability of connection can be further ensured. In addition, when the vibration frequency processing device 13 can be reduced in size, it may be provided in each rope tension measuring device, and a measurement result may be transmitted to the outside by wireless communication.

  Further, the spring rod 10a is a member installed at the distal end portion of the guide pulley shaft support bracket 9b from the side of the fixture 11c via the spring tension adjusting nut 10d, the first spring seat 10c1, the spring 10b, and the second spring seat 10c2. A stopper 10e is provided at the tip of the spring rod 10a.

  That is, the rope tension measuring device of the present embodiment has a guide pulley 9a for following the movement of the main rope 6, and a wireless communication 8b type acceleration is applied to a guide pulley shaft support bracket 9b for supporting a guide pulley shaft (not shown). A sensor 8a is provided. Furthermore, the spring rod 10a follows the vibration of the main rope 6 in the front-rear direction (moving in the axial direction by the sliding structure portion) and in the left-right direction (moving in the front-rear direction in the direction perpendicular to the paper surface by the bearing portion 11a and the fulcrum pin 11b). It is mounted via a fixture 11c for fixing to the hoistway tower equipment, a bearing portion 11a and a fulcrum pin 11b, and via a spring tension adjusting nut 10d, a first spring seat 10c1, a spring 10b, and a second spring seat 10c2. The guide pulley shaft support bracket 9b is inserted into the through hole 10f2 of the member 10f1, which is a sliding structure portion, and is attached by a stopper 10e.

  As a result, the main rope 6 is moved in the vertical direction (vertical direction), and back and forth (axial movement by the sliding structure portion), and left and right (front and rear direction movement in the direction perpendicular to the paper surface by the bearing portion 11a and the fulcrum pin 11b). When the guide pulley 9a can follow, the vibration (not shown) of the main rope 6 is measured by the acceleration sensor 8a, the measured information is sent by the wireless communication 8b, and the information measured by the wireless communication receiving unit 12 is received. Is sent to the vibration frequency processing device 13, and vibration analysis is performed by the vibration frequency processing device 13, and when it is determined that the vibration frequency is abnormally changed, the alarm device 14 notifies the control center (not shown) Is to do.

  FIG. 3 shows tension on the vertical axis and time on the horizontal axis. The explanation will be made based on the elevator apparatus shown in FIG. 1. As an example, the total of the tension T1 rope 15, the tension T2 rope 16, and the tension T3 rope 17 are measured. Changes in the three tensions with time are shown (the tension T1 rope 15, the tension T2 rope 16, and the tension T3 rope 17 are obtained by extracting three arbitrary ropes from each rope shown in FIG. 1).

  When the elevator device is newly installed or the rope is replaced, the tension of the plurality of main ropes 6 is uniformly adjusted at the car side rope end 6b1 and the counterweight side rope end 6b2. 6, the rope 6a1 between the car side rope end 6b1 and the first car lower pulley 4a1, the rope 6a2 between the car side top pulley 4c1 and the second car lower pulley 4a2, and the car side top pulley 4c1. -Rope 6a3 between hoisting machine sheave 5, counterweight side top pulley 4c2- Rope 6a4 between hoisting machine sheave 5, rope 6a5 between counterweight side top pulley 4c2 and counterweight pulley 4b, counterweight side rope end 6b2-rope 6a6 between counterweight pulley 4b To which tension is uneven.

  When the car 1 moves up and down in a hoistway (not shown) in a state in which the tension of the rope is not uniform, the initial elongation of the tension T1 rope 15 having the largest tension proceeds. Accordingly, the tension T2 rope 16 having the next largest tension and the tension T3 rope 17 having the smallest tension are also smaller than the tension T1 rope 15, but the initial elongation similarly proceeds. The elongation rate of the initial elongation is tension T1 rope 15> tension T2 rope 16> tension T3 rope 17.

  As the initial elongation of the tension T1 rope 15, the tension T2 rope 16, and the tension T3 rope 17 proceeds, the respective tensions become uniform on the tension uniform line 18. At this time, the tension T1 rope 15 is fully stretched initially, and beyond this, the tension is not initially stretched. On the other hand, the tension T2 rope 16 and the tension T3 rope 17 are still in the initial extension state. When the car 1 moves up and down in a hoistway (not shown) in this state, the tension T2 rope 16 and the tension T3 rope 17 are initially extended and the tension is decreased, but the tension T1 rope 15 is initially extended. Since it is a state which is not initially stretched beyond this, tension | tensile_strength will continue to be applied.

  If this state continues, the tension T1 rope 15 does not extend, but the hoisting machine sheave 5 or the first car lower pulley 4a1 of the car 1, the second car lower pulley 4a2, the car side top pulley 4c1, the counterweight side One of the grooves of the top pulley 4c2 and the counterweight pulley 4b continues to wear, and the main rope 6 is worn and the first shelves under the pulley 4a1 of the hoisting machine sheave 5 or the car 1 and the second car lower pulley. 4a2, the car-side top pulley 4c1, the hoist sheave 5, the counterweight-side top pulley 4c2, and the counterweight pulley 4b.

  Reference numeral 19 indicates that the tension of the tension T1 rope 15, the tension T2 rope 16, and the tension T3 rope 17 is changed again from the tension uniform line 18 where the tensions of the tension T1 rope 15, the tension T2 rope 16, and the tension T3 rope 17 become uniform. This is an abnormality detection line that becomes non-uniform.

  FIG. 4 shows an embodiment of an elevator apparatus provided with the rope tension measuring device of the present invention. One end of the rope 6a6 between the counterweight side rope end portion 6b2 and the counterweight pulley 4b from the counterweight pulley 4b is shown in FIG. The sixth rope tension measuring device 7a6 is fixed between the counterweight side rope end portion 6b2 and the counterweight pulley 4b from the counterweight pulley 4b. 6a6 is attached and contacted. The fifth rope tension measuring device 7a5 is attached in contact with the rope 6a5 between the counterweight side top pulley 4c2 and the counterweight pulley 4b from the counterweight side top pulley 4c2 to the counterweight 2. The fourth rope tension measuring device 7 a 4 is attached in contact with the rope 6 a 4 between the counterweight side top pulley 4 c from the hoisting machine sheave 5 and the hoisting machine sheave 5. The third rope tension measuring device 7a3 is attached in contact with the rope 6a3 between the car-side top pulley 4c1 and the hoisting machine sheave 5 from the car-side top pulley 4c1 to the hoisting machine sheave 5. The second rope tension measuring device 7a2 is attached in contact with the rope 6a2 between the car side top pulley 4c1 and the second car lower pulley 4a2 from the second car lower pulley 4a2. The rope 6a1 between the car-side rope end 6b1 to the first car lower pulley 4a1 and the first car lower pulley 4a1 is fixed at the car-side rope end 6b1 via a tension rod (not shown). The one rope tension measuring device 7a1 is attached in contact with the rope 6a1 between the car-side rope end portion 6b1 to the first car lower pulley 4a1 and the first car lower pulley 4a1.

  The first rope tension measuring device 7a1 of the present embodiment is connected to the rope 6a1 close to the car rope end portion 6b1, and the second rope tension measuring device 7a2 and the third rope tension measuring device 7a3 are car side top pulleys. The rope 6a2 and the rope 6a3 close to 4c1, the fourth rope tension measuring device 7a4 and the fifth rope tension measuring device 7a5 are connected to the rope 6a4 and the rope 6a5 close to the counterweight side top pulley 4c2, and the sixth rope tension measuring device 7a6 is Each rope tension measuring device is installed at the drop position of each rope, in contact with the rope 6a6 close to the counterweight side rope end portion 6b2.

  At this time, the fifth and sixth rope tension measuring devices 7a5 and 7a6 are attached at positions where they do not come into contact with the counterweight 2. Further, the first and second rope tension measuring devices 7a1 and 7a1 are attached at positions where they do not contact the car 1. Further, the third and fourth rope tension measuring devices 7a3 and 7a3 are installed at the top of the hoistway (not shown), but can also be installed near the middle of the hoistway (not shown).

  Such a rope tension measuring device of the present embodiment can follow the movement of the main rope 6 and the vibrations in the front, rear, left and right directions, so that it can be permanently installed in the main rope 6. In addition, the rope tension measuring device of this embodiment is permanently installed in all the main ropes 6 and the main rope 6 dropping positions, so that the main rope tension state is changed by the natural vibration of each main rope 6 when the elevator apparatus travels. It is possible to measure constantly. Furthermore, it is possible to adjust the main rope tension before it reaches the effect of excessive tension, by detecting the change in the main rope tension state by constant measurement and having the alarm function. It is possible to prevent a failure of the elevator apparatus due to a strand break or the like.

  Therefore, according to the present embodiment, it is possible to always measure the rope tension even when the number of main ropes 6 used is large.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. That is, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Ride car, 2 ... Counterweight, 3 ... Hoisting machine, 4a1 ... 1st ride car lower pulley, 4a2 ... 2nd ride car lower pulley, 4b ... Counter weight pulley, 4c1 ... Car side top pulley, 4c2 ... Counterweight side top pulley, 5 ... Hoisting machine sheave, 6 ... Main rope, 6a1 ... Rope between the car side rope end and the first car lower pulley, 6a2 ... Between the car side top pulley and the second car lower pulley 6a3: Rope between the car side top pulley and the hoisting machine sheave, 6a4 ... Rope between the counterweight side top pulley and the hoisting machine sheave, 6a5 ... Rope between the counterweight side top pulley and the counterweight pulley, 6a6: Rope between the counterweight side rope end and the counterweight pulley, 6b1: Rope end on the car side Part 6b2 ... counterweight side rope end 7a1 ... first rope tension measuring device 7a2 ... second rope tension measuring device 7a3 ... third rope tension measuring device 7a4 ... fourth rope tension measuring device 7a5 ... first 5 rope tension measuring device, 7a6 ... sixth rope tension measuring device, 8a ... acceleration sensor, 8b ... wireless communication, 9a ... guide pulley, 9b ... guide pulley shaft support bracket, 10a ... spring rod, 10b ... spring, 10c1 ... first DESCRIPTION OF SYMBOLS 1 spring seat, 10c2 ... 2nd spring seat, 10d ... Spring tension adjustment nut, 10e ... Stopper, 10f1 ... Member, 10f2 ... Through-hole, 11a ... Bearing part, 11b ... Supporting pin, 11c ... Fixing metal fitting, 12 ... Wireless communication Receiving unit, 13 ... vibration frequency processing device, 14 ... alarm device, 15 ... tension T1 -Flops, 16 ... tension T2 rope, 17 ... tension T3 rope, 18 ... tension uniform line, 19 ... abnormality detection line.

Claims (8)

A guide pulley that follows the movement of the rope;
A guide pulley shaft support bracket for rotatably supporting the guide pulley;
A spring rod in which one end is slidably supported by the guide pulley shaft support bracket and the other end is rotatably supported by a fixing bracket fixed to a fixing member, and a spring is installed;
An acceleration sensor installed on the guide pulley shaft support bracket and measuring the vibration of the rope;
A vibration frequency processing device that receives vibration information of the rope measured by the acceleration sensor, analyzes the vibration information of the rope, and determines whether or not the tension state of the rope is abnormal. Rope tension measuring device. In the rope tension measuring device according to claim 1,
A wireless communication receiving unit that receives vibration information of the rope measured by the acceleration sensor via wireless communication, and transmits the information to the vibration frequency processing device;
A rope tension measuring device, further comprising a reporting device for reporting to the outside when the vibration frequency processing device determines that the tension state of the rope is abnormal. In the rope tension measuring device according to claim 1 or 2,
A member having a through hole in the axial direction is installed at the end of the guide pulley shaft support bracket opposite to the side on which the guide pulley is supported, and one end of the spring rod slides into the through hole of the member. A rope tension measuring device, wherein the rope tension measuring device is inserted movably, and the fixing bracket includes a bearing portion, and the other end of the spring rod is rotatably mounted via a support pin. . In the rope tension measuring device according to claim 3,
The spring rod is inserted into the through hole of the member installed at the distal end portion of the guide pulley shaft support bracket from the fixing bracket side through the spring tension adjusting nut, the first spring seat, the spring and the second spring seat. A rope tension measuring device characterized in that a stopper is provided at the tip of the spring rod. A rope fixed at both ends is installed from one end to the other end via the first and second car lower pulleys, the car top pulley, the hoist sheave, the counterweight top pulley and the counterweight pulley. And an elevator apparatus equipped with a rope tension measuring device for measuring the tension of the rope while moving the rope by rotating the hoisting machine sheave by a hoisting machine and moving the rope up and down,
5. The elevator apparatus according to claim 1, wherein the rope tension measuring device is the rope tension measuring device according to claim 1. In the elevator apparatus according to claim 5,
The one end side to which the rope is fixed is a car side rope end portion, and the other end side is a counterweight side rope end portion,
The rope tension measuring device includes a rope between the car side rope end and the first car lower pulley, a rope between the car side top pulley and the second car lower pulley, and the car side top pulley. And a rope between the hoisting machine sheave, a rope between the counterweight side top pulley and the hoisting machine sheave, a rope between the counterweight side top pulley and the counterweight pulley, the counterweight side rope end and the An elevator apparatus characterized by being installed on each of the ropes between the counterweight pulleys. In the elevator apparatus according to claim 6,
The said rope tension measuring device is installed in the fall position of the said rope, The elevator apparatus characterized by the above-mentioned. A rope fixed at both ends is installed from one end to the other end via the first and second car lower pulleys, the car top pulley, the hoist sheave, the counterweight top pulley and the counterweight pulley. The rope of the elevator apparatus which measures the tension of the rope of the elevator apparatus which drives the hoisting machine sheave by the hoisting machine and moves the rope to raise and lower the car using the rope tension measuring device In the tension measurement method,
The rope tension measurement device according to any one of claims 1 to 4, wherein the rope tension measurement device receives vibration information of the rope measured by the acceleration sensor, and vibrates the vibration information of the rope. A rope tension measuring method for an elevator apparatus, characterized in that it is analyzed by a frequency processing device to determine whether or not the tension state of the rope is abnormal.

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