JP2011162341A - Rope tension measuring device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continuously monitor a load applied to a main rope of an elevator. <P>SOLUTION: A sensor device 2 is installed by separating by a dimension L3(&ge;L1+L2) of becoming an adding value or more of adding up a dimension L1 by which a measured value is not substantially influenced by an installation position and a rope shortening dimension L2 of maintenance work, from one end for fixing the rope end in a socket 4 to a mainrope 1. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an elevator rope tension measuring device for measuring a load applied to a main rope provided in an elevator.

  In order to evenly adjust the relative load applied to multiple main ropes such as elevator hoisting ropes, the main rope is temporarily struck with a hammer, the vibration period and the difference between them are obtained with the hand feeling and stopwatch, and the main rope Conventionally, the relative tension is adjusted.

  In addition, to solve the problem that the measurement frequency cannot be obtained because the vibration period changes due to errors due to individual differences due to manual work, lack of accuracy, differences in the length of the main rope that varies from site to site, etc. Adjust the relative main rope tension by attaching the sensor device to the main rope, displaying the vibration period measured by the sensor device on the tension difference display device, adjusting the nut of the main rope of the maximum frequency, etc. Such a rope tension measuring device has been conventionally proposed (see Patent Document 1).

JP-A-7-209109

  The prior art provided with the sensor device described above relates to tension adjustment, and no consideration has been given to continuously monitoring the load applied to the main rope. In particular, when monitoring the load on the main rope, the sensor device can be attached to the main rope at all times or for a long period of time, or the sensor device can be attached to many main ropes. May cause variations. Therefore, in order to adjust the measurement accuracy of the sensor device, monitoring of the load on the main rope is temporarily suspended, and the time required for maintenance work increases due to work such as changing the mounting position of the sensor device. There was a problem.

  The present invention has been made from the above-described prior art, and an object thereof is to provide an elevator rope tension measuring device capable of continuously monitoring a load applied to an elevator main rope.

  In order to achieve the above object, an elevator rope tension measuring device according to the present invention is an elevator rope tension measuring device for measuring each tension of the main rope by attaching a sensor device to each of the plurality of main ropes of the elevator. In each of the plurality of sensor devices, a dimension capable of ensuring the accuracy of load measurement from the corresponding rope end fixing portion of the main rope along the length direction of the corresponding main rope, It is characterized by being mounted apart by a dimension equal to or greater than the added value.

  In the elevator rope tension measuring device according to the present invention, the sensor device attached to each of the adjacent main ropes in the invention has a size larger than the sensor device size in the length direction of each of the main ropes. It is preferable to install it shifted up and down.

  In the elevator rope tension measuring device according to the present invention, the plurality of sensor devices are connected to each other by a virtual line at the center of the cross section of each of the plurality of main ropes at the end of the rope. It is preferable to attach so as to be located outside the virtual polygon.

  Further, the elevator rope tension measuring device according to the present invention is the measuring device according to the present invention, which measures the tension of the corresponding main rope based on the respective signals output from the plurality of sensor devices, and the measuring device. It is preferable that a cable for connecting each of the plurality of sensor devices is provided, and a connection device for detachably connecting at least one of the plurality of sensor devices and the corresponding cable.

  According to the present invention, since the tension measurement accuracy is less affected by the rope end, the tension can be measured with stable measurement accuracy. Furthermore, even if the rope is stretched and cut down, the dimensions that can ensure the accuracy of load measurement can be ensured, so that the accuracy of tension measurement can be ensured without changing the mounting position of the sensor device. Therefore, even if the sensor device is attached to the main rope at all times or for a long period of time or attached to a large number of main ropes, it is possible to ensure stable accuracy of tension measurement without requiring adjustment of the sensor device. Thereby, the load applied to the main rope of the elevator can be continuously monitored without causing interruption. Moreover, since the time required for maintenance related to the tension adjustment work of the main rope can be reduced, the efficiency of the maintenance work can be improved as compared with the conventional technique.

It is a side view showing a 1st embodiment of a rope tension measuring device of an elevator concerning the present invention. It is a top view which shows the principal part structure of 2nd Embodiment of this invention. It is a side view which shows the principal part structure of 3rd Embodiment of this invention. It is a side view which shows the principal part structure of 4th Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an elevator rope tension measuring device according to the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a side view showing a first embodiment of a rope tension measuring device for an elevator according to the present invention, showing a rope end fixing portion and its vicinity in an upper part of a hoistway.

  The main ropes 1 and 5 shown in FIG. 1 respectively suspend a car and a counterweight (not shown) and are wound around a hoisting machine (not shown). When the hoisting machine rotates and the main ropes 1 and 5 are driven, the car and the counterweight move up and down in the hoistway.

  Each of the ends of the main ropes 1 and 5 is inserted into the socket 4 from one end of the corresponding socket 4, folded back in a loop shape in the socket 4, and taken out from the same end of the socket 4. In the socket 4, the main ropes 1, 5 are fixed to one end of the socket 4 by preventing the main ropes 1, 5 from coming out of the socket 4 by a wedge body (not shown). One end of a thimble rod 41 is fixed to the other end of the socket 4. The other end portion of the thimble rod 41 is passed through the support base 3, and further passed through the spring 43, and then attached to the support base 3 by fitting a nut 44 to a screw portion provided at the other end portion. By rotating the nut 44, the tension of the main ropes 1 and 5 can be adjusted.

  A sensor device 2 for measuring a load applied to the main rope 1 is attached to the main rope 1. Here, the sensor device 2 measures the tension by the pressing force when the main rope 1 is pressed from the direction perpendicular to the length direction and the bending of the main rope 1 (for example, JP-A-8-178770). See), measuring tension by reaction force acting on the fulcrum of the fulcrum member when the fulcrum member is attached to the rope (for example, see JP-A-8-152369), depending on the vibration frequency of the rope detected by the acceleration sensor A known tension detecting device such as a device for measuring tension (see, for example, JP-A-7-209109) can be used.

  In the rope tension measurement device according to the first embodiment, for example, when any of the tension detection devices described above is used as the sensor device 2, if the detected force or vibration is affected by the fixed rope end, Tension measurement accuracy is insufficient. For this reason, the sensor device 2 is attached at a predetermined dimension L1 or more away from one end where the rope end is fixed in the socket 4 so as to ensure load measurement accuracy. The predetermined dimension L1 is a dimension such that when the tension is measured while changing the mounting position of the sensor device 2 with respect to the main rope 1, the measured value is almost unaffected by the mounting position. Is set.

  In addition, since the main rope 1 extends due to aging, the length of the main rope 1 is adjusted by cutting the rope during maintenance work. In consideration of this, the truncation dimension L2 is also secured. As a result, the main rope 1 can be trimmed without changing the mounting position of the sensor device 2, so that the maintenance work time does not increase.

  That is, in the first embodiment, the sensor device 2 is attached to the main rope 1 with a predetermined dimension L3 (≧ L1 + L2) away from one end where the rope end of the socket 4 is fixed. By attaching the sensor device 2 to the main rope 1 with the dimension L3, since the dimension L1 is secured, the tension can be measured with stable measurement accuracy. Furthermore, since the dimension L1 can be secured even when the rope is stretched and cut down, the accuracy of load measurement can be secured without removing the sensor device 2 from the main rope 1 and changing the mounting position of the sensor device 2. it can. Therefore, according to the first embodiment, the sensor device 2 can be adjusted even if the sensor device 2 is attached to the main rope 1 at all times or over a long period of time, or attached to a number of main ropes including the main rope 1. Therefore, stable tension measurement accuracy can be ensured. Thereby, the load applied to the main rope 1 or the like can be continuously monitored without causing interruption. In addition, since the time required for maintenance related to the tension adjustment work for the main rope 1 and the like can be reduced, the efficiency of the maintenance work can be improved.

  In addition to the above-described configuration, the first embodiment measures the load on the main rope 5 with respect to the main rope 5 that is adjacent to the main rope 1 and to which the rope end is fixed in the same manner as the main rope 1. Further, a sensor device 6 of the same type as the sensor device 2 attached to the main rope 1 is attached. The sensor device 6 sets the distance between, for example, the centers of the sensor device 6 and the sensor device 2 in the length direction of the rope in the same length direction so as not to interfere with the sensor device 2 attached to the main rope 1. The dimension L5 is larger than the dimension L4 (> L4). Therefore, the sensor device 6 is attached to the main rope 5 at a position separated from the end where the rope end of the socket 4 is fixed by the dimension L5 added to the predetermined dimension L3 described above. That is, the sensor device 2 and the sensor device 6 are installed so as to be shifted up and down at a distance L5. By installing the sensor device 6 in this way, for example, replacement work of the sensor device 6 can be performed without affecting other sensor devices 2. In addition, when the main ropes 1 and 5 are shaken, the sensor device 2 and the sensor device 6 can be prevented from coming into contact with each other and being damaged.

  Furthermore, this 1st Embodiment is the measuring apparatus 7 which measures the tension | tensile_strength of the corresponding main ropes 1 and 5 based on each signal output from the sensor apparatuses 2 and 6, and this measuring apparatus 7 and sensor apparatus 2, 6 are connected to each other. The cable 8 is fixed to the main rope 1 by a clip 51 along the length direction of the main rope 1. Thereby, the shift | offset | difference of the attachment position of the sensor apparatus 2 by the rope shake at the time of operation of an elevator can be prevented. Further, the cable 8 connected to the sensor device 6 is fixed to the main rope 5 by the clip 51 in the connection portion between them, as in the sensor device 2, but the connection portion between the sensor device 6 and the cable 8 in the cable 8. And the measuring device 7 are separated from the main rope 5 along the length direction of the main rope 5 by being wound around a pulley provided near the socket 4. Thereby, even if the main rope 5 shakes, the contact between the main rope 5 and the cable 8 is prevented, and damage to the cable 8 due to the contact can be prevented.

  As described above, according to the first embodiment, the sensor devices 2 and 6 are installed apart from the socket 4 that fixes the main ropes 1 and 5 to the support base 3 by a dimension L3 or more, so that the rope trimming operation can be performed. Even with this, it is possible to measure a load with high accuracy without changing the positions of the sensor devices 2 and 6. In addition, the installation can be easily performed by installing the sensor devices 2 and 6 and the sensor devices 2 and 6 installed on the main ropes 1 and 5 with the dimension L5 shifted vertically.

[Second Embodiment]
FIG. 2 is a plan view showing the main configuration of the second embodiment of the present invention. This figure has shown the projection of the horizontal cross section of the main rope, and the projection of the horizontal cross section of the sensor apparatus attached to each main rope when the fixed part of the main rope end is seen from the hoistway upper part.

  In the second embodiment, corresponding ones of the sensor devices 13, 14, 15, 16, and 17 are attached to the five main ropes 8, 9, 10, 11, and 12, respectively. Similarly to the first embodiment described above, the sensor devices 13, 14, 15, 16, and 17 are attached by being separated by a predetermined dimension L 3 (≧ L 1 + L 2) from one end where the rope end is fixed in the socket 4. Similarly to the first embodiment, when adjacent main ropes interfere with each other when the main rope swings, each of the sensor devices attached to the adjacent main ropes has a size L5 larger than the sensor device size L4. (> L4) is shifted up and down.

  In the second embodiment, as shown in FIG. 2, in each cross section of the main ropes 9, 10, 11, and 12, an imaginary line (broken line in the figure) that connects these cross-sectional center portions forms a virtual quadrangle S. Are arranged as follows. The cross section of the main rope 8 is located at the center of the virtual quadrangle S. Such an array of main rope cross sections corresponds to an array of sockets and thimble rods for fixing the ends of the main ropes. The sensor devices 14, 15, 16, and 17 are attached to the corresponding main ropes 9, 10, 11, and 12 so that their cross sections are located outside the virtual quadrangle S. Furthermore, in this 2nd Embodiment, the sensor apparatus 14,15,16,17 is attached so that the cross section may protrude in the direction extended radially from the center part of the virtual quadrangle | tetragon S. FIG. As a result, it is possible to easily perform the replacement work of the sensor device.

  In the second embodiment, the number of main ropes is five. However, in the present invention, the number of main ropes is not limited to five, and virtual lines connecting the cross sections of a plurality of main ropes are virtual. Applicable when forming a polygon.

[Third Embodiment]
FIG. 3 is a side view showing the main configuration of the third embodiment of the present invention. The third embodiment is configured to include a connecting device 18 that detachably connects at least one of the plurality of sensor devices, for example, the sensor device 6 attached to the main rope 5 and the corresponding cable 8. is there. Other configurations are the same as those of the first embodiment. According to the third embodiment, when the main rope 5 is twisted and the cable 8 is wound around the main rope 5 due to the aging of the elevator, the sensor device 6 is removed by disconnecting the connecting device 18. The winding of the cable 8 can be eliminated without removing it from the rope 5. Therefore, maintenance work is facilitated.

[Fourth Embodiment]
FIG. 4 is a side view showing the main configuration of the fourth embodiment of the present invention. Even in the fourth embodiment, the basic configuration including the mounting position of the sensor device is the same as in the first embodiment. In the fourth embodiment, in the elevator system 19 employing the one-to-one roping method, the sensor device 20 is installed in the vicinity of the rope end fixing portion provided in the passenger car so as to measure the load applied to the main rope. It is. In the elevator system 22 adopting the 2-to-1 roping method, the sensor devices 23 and 24 are installed in the vicinity of fixed portions at both ends of the main rope 25, and the load is measured. Even in the fourth embodiment configured as described above, it is possible to obtain the same operational effects as those of the first embodiment described above.

1, 5, 8, 9, 10, 11, 12 Main ropes 2, 6, 13, 14, 15, 16, 17, 20, 23, 24 Sensor device 3 Support base 4 Socket 7 Measuring device 8 Cable 18 Connection device 41 Thimble rod 42 Clip 43 Spring 44 Nut

Claims (4)

In the elevator rope tension measuring device for measuring the tension of each of the main ropes by attaching a sensor device to each of the plurality of main ropes of the elevator,
Each of the plurality of sensor devices is added with a dimension capable of ensuring load measurement accuracy from the rope end fixing portion of the corresponding main rope along the length direction of the corresponding main rope, and a rope trimming dimension. Elevator rope tension measuring device, which is mounted apart by a dimension larger than the value. In the elevator rope tension measuring device according to claim 1,
The elevator rope tension measuring device, wherein the sensor device attached to each of the adjacent main ropes is installed by being shifted up and down by a size larger than the sensor device size in the length direction of each of the main ropes. In the elevator rope tension measuring device according to claim 1 or 2,
An elevator characterized in that each of the plurality of sensor devices is mounted so as to be positioned outside a virtual polygon formed by connecting cross-sectional central portions of the plurality of main ropes at a rope end portion with a virtual line. Rope tension measuring device. In the elevator rope tension measuring device according to any one of claims 1 to 3,
A measuring device that measures the tension of the corresponding main rope based on each signal output from the plurality of sensor devices, and a cable that connects each of the measuring device and the plurality of sensor devices,
An elevator rope tension measuring device, comprising: a connecting device for detachably connecting at least one of the plurality of sensor devices and the corresponding cable.

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