WO2020115861A1 - Elevator tension measurement device - Google Patents

Abstract

An elevator tension measurement device, wherein each of a plurality of shackle rods is connected to a corresponding suspension body. Each of a plurality of shackle springs has a corresponding shackle rod penetrating therethrough. Each of a plurality of nuts is screwed onto a corresponding shackle rod. Each of a plurality of displacement meters detects expansion and contraction of a corresponding shackle spring. A measurement unit measures tension for each of the plurality of suspension bodies on the basis of signals from the plurality of displacement meters.

Description

Elevator tension measuring device

The present invention relates to an elevator tension measuring device for measuring the tension of a suspension for suspending a car, for example.

In a conventional elevator main rope tension measuring device, multiple nuts are attached to the thimble rod. Further, the thimble rod penetrates the spring, the spring seat, the sensor portion, and the sensor fixing portion. The spring seat is in contact with the upper end of the spring. The sensor fixing portion is in contact with the lower end of the nut. The sensor section is interposed between the spring seat and the sensor fixing section. A strain gauge is provided in the sensor unit (see, for example, Patent Document 1).

Japanese Patent No. 6170810

In the conventional main rope tension measuring device as described above, since the strain of the sensor unit is detected by the strain gauge, the configuration is simple, but the sensor unit deteriorates over time, and the characteristics of the strain gauge change. Then, the stability of the measurement was not sufficient.

The present invention has been made to solve the above problems, and an object thereof is to obtain an elevator tension measuring device capable of stably measuring the tension of a suspension for a longer period of time. To do.

The elevator tension measuring device according to the present invention includes a plurality of shackle rods respectively connected to corresponding suspensions, a plurality of shackle springs through which the corresponding shackle rods pass, and a shackle rod corresponding to each shackle rod. It has a plurality of nuts, a plurality of displacement gauges that detect expansion and contraction of the corresponding shackle springs, and a measurement unit that individually measures the tension of each suspension body based on the signals from the displacement gauges. There is.

Since the elevator tension measuring device of the present invention detects expansion and contraction of a plurality of shackle springs by a plurality of displacement gauges, the tension of the suspension can be stably measured over a longer period of time.

It is a schematic block diagram which shows the machine room less elevator by Embodiment 1 of this invention. It is a front view which shows the tension measuring device of FIG. It is a top view which shows the base of FIG. It is a front view which shows the connection state of the 1st connection member and wire of FIG. It is a side view which shows the connection state of the 1st connection member of FIG. 4, and a wire. It is a front view which shows the 2nd connection member of FIG. It is a side view which shows the 2nd connection member of FIG. It is a front view which shows the 3rd connection member of FIG. It is a side view which shows the 3rd connection member of FIG. It is explanatory drawing which shows the difference of the measurement error by the connection position of a wire. It is a top view which shows the 1st modification of the base of FIG. It is a top view which shows the 2nd modification of the base of FIG. It is a front view which shows the tension measurement apparatus of the elevator by Embodiment 2 of this invention. It is a front view which shows the tension measurement apparatus of the elevator by Embodiment 3 of this invention. It is a front view which shows the tension measuring device of the elevator by Embodiment 4 of this invention. It is a block diagram which shows the modification which installed the tension measuring device in the machine room.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1.
1 is a schematic configuration diagram showing a machine room-less elevator according to Embodiment 1 of the present invention, showing a state at the time of maintenance and inspection. In the figure, a hoisting machine 2 is installed in the lower part of the hoistway 1. The hoisting machine 2 has a hoisting machine body 3 and a drive sheave 4.

The hoisting machine main body 3 has a hoisting machine motor (not shown) and a hoisting machine brake (not shown). The hoist motor rotates the drive sheave 4. The hoisting machine brake holds the stationary state of the drive sheave 4 or brakes the rotation of the drive sheave 4.

A plurality of suspensions 5 are wound around the drive sheave 4. In FIG. 1, only one suspension 5 is shown. As each suspension body 5, for example, a rope or a belt is used.

The car 6 is suspended by the suspension 5 on one side of the drive sheave 4. The counterweight 7 is suspended by a suspension 5 on the other side of the drive sheave 4. In FIG. 1, the car 6, the hoisting machine 2, and the counterweight 7 are shown side by side for the sake of simplicity. It is located right next to it.

Each suspension 5 has a first end 5a which is an end on the side of the car 6 and a second end 5b which is an end on the side of the counterweight 7.

At the bottom of the car 6, a first car suspension car 8a and a second car suspension car 8b are provided. On the upper part of the counterweight 7, a counterweight suspension wheel 9 is provided. A first return wheel 10 and a second return wheel 11 are provided in the upper part of the hoistway 1.

Each suspension body 5 includes, in order from the first end 5a side, a first car suspension car 8a, a second car suspension car 8b, a first return sheave 10, a drive sheave 4, a second return sheave 11, And is wound around the counterweight suspension vehicle 9 and reaches the second end 5b. That is, the car 6 and the counterweight 7 are suspended by the 2:1 roping method.

A tension measuring device 12 is provided above the first car suspension car 8a in the hoistway 1. The tension measuring device 12 measures each tension of the plurality of suspension bodies 5.

The tension measuring device 12 has a first rope fastening mechanism 13 and a measuring device body 14. The first rope fastening mechanism 13 is connected to the first end portions 5 a of all the suspension bodies 5. FIG. 1 shows a worker adjusting the first rope fastening mechanism 13 on the car 6.

A second rope fastening mechanism 15 is provided above the counterweight suspension vehicle 9 in the hoistway 1. The second rope fastening mechanism 15 is connected to the second ends 5b of all the suspension bodies 5. The configuration of the second rope fastening mechanism 15 is similar to the configuration of the first rope fastening mechanism 13.

FIG. 2 is a front view showing the tension measuring device 12 of FIG. 1, and is a view of the tension measuring device 12 viewed from above the car 6. The first rope fastening mechanism 13 has a base 21, a plurality of shackle rods 22, a plurality of shackle springs 23, a plurality of spring seats 24, a plurality of spring bearings 25, and a plurality of nuts 26.

The base 21 is supported and fixed by a support beam (not shown). The plurality of shackle rods 22 are respectively connected to the first ends 5 a of the corresponding suspension bodies 5. Further, each shackle rod 22 penetrates the base 21.

Plurality of shackle springs 23 are supported on the base 21. Further, each shackle spring 23 expands and contracts according to the tension of the corresponding suspension 5. A corresponding shackle rod 22 penetrates each shackle spring 23.

Each spring seat 24 is interposed between the corresponding shackle spring 23 and the base 21. A corresponding shackle rod 22 penetrates each spring seat 24.

Each spring receiver 25 is supported on the corresponding shackle spring 23. A corresponding shackle rod 22 passes through each spring receiver 25.

Each nut 26 is screwed onto the corresponding shackle rod 22 on the corresponding spring bearing 25. Two nuts 26 are screwed into each shackle rod 22. The two nuts 26 screwed into each shackle rod 22 function as double nuts. By adjusting the tightening amount of these nuts 26, the tension of each suspension 5 can be adjusted.

The plurality of shackle rods 22 are arranged in front and rear rows as viewed from above the car 6. In this example, four shackle rods 22 are arranged at equal intervals in the front row, and three shackle rods 22 are arranged at equal intervals in the rear row.

The shackle rods 22 in the rear row are arranged between the shackle rods 22 in the front row as viewed from above the car 6.

FIG. 3 is a plan view showing the base 21 of FIG. The base 21 is provided with a plurality of base holes 21a. A corresponding shackle rod 22 is passed through each base hole 21a. Therefore, the disposition of the shackle rod 22 as viewed from directly above is the same as the disposition of the base hole 21a.

Along with the arrangement of the shackle rods 22, the plurality of shackle springs 23 are also arranged in front rows and rear rows. The plurality of nuts 26 are also arranged separately in the front row and the rear row.

Returning to FIG. 2, the measuring device main body 14 includes a frame 31, a plurality of differential transformers 32 as displacement gauges, a measuring unit 33, a plurality of first connecting members 34, a plurality of second connecting members 35, and a plurality of connecting members. The third connecting member 36, a plurality of wires 37 as a transmitting member, a plurality of raising members 38, and a display unit 39.

The frame 31 has a first vertical frame 31a, a second vertical frame 31b, a first upper beam 31c, and a second upper beam 31d. The first vertical frame 31 a and the second vertical frame 31 b are vertically fixed on the base 21 and fixed.

The first upper beam 31c and the second upper beam 31d are horizontally fixed between the first vertical frame 31a and the second vertical frame 31b, respectively. The second upper beam 31d is arranged rearward of the first upper beam 31c when viewed from above the car 6. Further, the first upper beam 31c and the second upper beam 31d are arranged so as to be vertically offset from each other. In this example, the first upper beam 31c is located lower than the second upper beam 31d.

Of the plurality of differential transformers 32, four differential transformers 32 are attached to the first upper beam 31c and correspond to the shackle springs 23 in the front row, respectively. Of the plurality of differential transformers 32, three differential transformers 32 are attached to the second upper beam 31d and correspond to the shackle springs 23 in the rear row, respectively. Further, each differential transformer 32 is arranged directly above the corresponding shackle spring 23.

Further, each differential transformer 32 has a coil portion 32a, a core shaft 32b, and a transformer spring 32c. The core shaft 32b penetrates the coil portion 32a. The transformer spring 32c is provided between the coil portion 32a and the core shaft 32b.

Each core shaft 32b is displaced in the vertical direction with respect to the coil portion 32a according to the expansion and contraction of the corresponding shackle spring 23. Each differential transformer 32 detects the expansion and contraction of the corresponding shackle spring 23 by outputting a signal according to the position of the core shaft 32b with respect to the coil portion 32a.

The measuring unit 33 and the display unit 39 are integrally configured. The measuring unit 33 and the display unit 39 are attached to the first upper beam 31c. The measuring unit 33 individually measures the tensions of all the suspensions 5 based on the signals from all the differential transformers 32. The function of the measuring unit 33 can be realized by, for example, a microcomputer.

The display unit 39 displays the measurement result of the measuring unit 33. That is, the display unit 39 individually displays the tensions of all the suspension bodies 5. A liquid crystal display, for example, is used as the display unit 39. The worker can adjust the tension of each suspension 5 while checking the display on the display unit 39. Therefore, the display unit 39 is arranged at a position where the nut 26 can be visually recognized from a position where the nut 26 can be operated.

Further, the measurement result by the measuring unit 33 is sent to an elevator control device (not shown). The elevator control device measures the load of the car 6 based on the measurement result by the measurement unit 33. That is, the tension measuring device 12 also functions as a weighing device.

First connecting members 34 are connected to the shackle springs 23 at the left and right ends of the front row, respectively. A second connecting member 35 is connected to each of the two center shackle springs 23 in the front row. A third connecting member 36 is connected to each of the three shackle springs 23 in the rear row.

Each of the connecting members 34, 35, 36 is displaced in the vertical direction as the corresponding shackle spring 23 expands and contracts. That is, each connecting member 34, 35, 36 is vertically displaced together with the upper end of the corresponding shackle spring 23. Further, the lower ends of the connecting members 34, 35, 36 are arranged between the corresponding spring bearings 25 and the corresponding nuts 26.

The plurality of raising members 38 are respectively provided between the three shackle springs 23 and the nuts 26 arranged in the rear row. In this example, each raising member 38 is interposed between the corresponding spring receiver 25 and the corresponding third connecting member 36. Further, each of the raising members 38 raises the position of the corresponding nut 26.

The plurality of wires 37 are connected between the plurality of connecting members 34, 35, 36 and the plurality of differential transformers 32, respectively. Each wire 37 has flexibility. In addition, each wire 37 transmits the displacement of the corresponding connecting member 34, 35, 36 to the corresponding differential transformer 32.

For example, when any one of the plurality of connecting members 34, 35, 36 is displaced downward, the corresponding core shaft 32b is pulled down via the corresponding wire 37. When any of the plurality of connecting members 34, 35, 36 is displaced upward, the corresponding wire 37 is loosened and the corresponding transformer spring 32c pulls up the corresponding core shaft 32b.

FIG. 4 is a front view showing a connection state of the first connecting member 34 and the wire 37 of FIG. Further, FIG. 5 is a side view showing a connection state of the first connecting member 34 and the wire 37 of FIG.

4 and 5, the alternate long and short dash line indicates an extension of the central axis of the shackle rod 22 and the shackle spring 23. The connecting portion between each wire 37 and the corresponding connecting member 34, 35, 36 is located on the extension of the central axis of the corresponding shackle spring 23.

Each first connecting member 34 has a first connecting member main body 34a, a first upper flange 34b, and a first lower flange 34c. The front shape of the first connecting member main body 34a is a C-shape having a first opening 34d at an intermediate portion in the vertical direction. The left and right first connecting members 34 are arranged line-symmetrically so that the first opening 34d is located inside.

The first upper flange 34b is located at the upper end of the first connecting member body 34a. The first lower flange 34c is located at the lower end of the first connecting member body 34a.

The first upper flange 34b and the first lower flange 34c project in the same direction from the first connecting member body 34a and face each other. Further, the first upper flange 34b and the first lower flange 34c are horizontal when the corresponding shackle rods 22 are vertical.

A corresponding wire 37 is connected to the first upper flange 34b. A corresponding shackle rod 22 passes through the first lower flange 34c. Further, the first lower flange 34c is sandwiched between the corresponding spring bearing 25 and the corresponding nut 26.

FIG. 6 is a front view showing the second connecting member 35 of FIG. Further, FIG. 7 is a side view showing the second connecting member 35 of FIG.

Each second connecting member 35 has a second connecting member main body 35a, a second upper flange 35b, and a second lower flange 35c. The front shape of the second connecting member main body 35a is a C-shape having a second opening 35d at an intermediate portion in the vertical direction. The left and right second connecting members 35 are arranged line-symmetrically so that the second opening 35d is located inside.

The second upper flange 35b is located at the upper end of the second connecting member body 35a. The second lower flange 35c is located at the lower end of the second connecting member body 35a.

The second upper flange 35b and the second lower flange 35c project in the same direction from the second connecting member body 35a and face each other. Further, the second upper flange 35b and the second lower flange 35c are horizontal when the corresponding shackle rods 22 are vertical.

A corresponding wire 37 is connected to the second upper flange 35b. A corresponding shackle rod 22 passes through the second lower flange 35c. In addition, the second lower flange 35c is sandwiched between the corresponding spring bearing 25 and the corresponding nut 26.

FIG. 8 is a front view showing the third connecting member 36 of FIG. 9 is a side view showing the third connecting member 36 of FIG.

Each third connecting member 36 has a third connecting member body 36a, a third upper flange 36b, and a third lower flange 36c. The front shape of the third connecting member main body 36a is a rectangle.

The third upper flange 36b is located at the upper end of the third connecting member body 36a. The third lower flange 36c is located at the lower end of the third connecting member body 36a.

The third upper flange 36b and the third lower flange 36c project in the same direction from the third connecting member body 36a and face each other. Further, the third upper flange 36b and the third lower flange 36c are horizontal when the corresponding shackle rods 22 are vertical.

A corresponding wire 37 is connected to the third upper flange 36b. A corresponding shackle rod 22 passes through the third lower flange 36c. Further, the third lower flange 36c is sandwiched between the corresponding raising member 38 and the corresponding nut 26.

As shown in FIG. 2, the nuts 26 arranged in the rear row are located at the same height as the first opening 34d and the second opening 35d.

In such an elevator tension measuring device 12, expansion and contraction of a plurality of shackle springs 23 are detected by a plurality of differential transformers 32, respectively. Further, the differential transformer 32 that detects displacement is less likely to deteriorate over time than a strain gauge that detects strain due to force, a load cell that detects force, and the like. Therefore, the tension of the suspension 5 can be measured stably over a longer period of time.

Also, it is possible to individually grasp the tensions of the plurality of suspension bodies 5 and individually respond to the looseness of the suspension bodies 5. As a result, it is possible to deal with variations in tension more quickly, and it is possible to suppress the occurrence of uneven wear of at least one of the suspension 5 and the drive sheave 4.

Also, a plurality of connecting members 34, 35, 36 are respectively connected between the plurality of shackle springs 23 and the plurality of differential transformers 32. Therefore, when adjusting the tension of the suspension 5 by moving the shackle rod 22 upward, a sufficient adjustment allowance can be secured.

Also, a plurality of wires 37 are connected between the plurality of differential transformers 32 and the plurality of connecting members 34, 35, 36, respectively. Therefore, even if the shackle rod 22 is tilted, damage to the components can be prevented.

Further, the connecting portion between each wire 37 and the corresponding connecting member 34, 35, 36 is located on the extension of the central axis of the corresponding shackle spring 23. Therefore, the measurement error that occurs when the corresponding shackle rod 22 is tilted can be minimized.

FIG. 10 is an explanatory diagram showing the difference in measurement error depending on the connection position of the wire 37. Although the third connecting member 36 is shown in FIG. 10, the raising member 38 is omitted. The shackle rod 22 on the left side of FIG. 10 is in a vertical state. The shackle rods 22 on the center and right sides in FIG. 10 are inclined by the same angle.

Further, the wires 37 on the left side and the center of FIG. 10 are connected to the third connecting member 36 on the extension of the central axis of the corresponding shackle spring 23. The wire 37 on the right side of FIG. 10 is connected to the third connecting member 36 at a position outside the extension of the central axis of the corresponding shackle spring 23.

As can be seen by comparing the center and the right side of FIG. 10, when the connecting portion of the wire 37 is removed from the extension of the central axis of the shackle spring 23, the distance removed×the inclination angle of the shackle rod 22 becomes a direct measurement error. . However, the length of the wire 37 is considered to be unchanged.

Also, the nuts 26 arranged in the rear row are located at the same height as the first opening 34d and the second opening 35d. Therefore, the nuts 26 arranged in the rear row can be easily operated through the first opening 34d and the second opening 35d. As a result, all the nuts 26 can be easily operated from above the car 6.

Further, since the raising member 38 is used, the height of the nuts 26 arranged in the rear row can be easily adjusted to the height of the first opening 34d and the second opening 35d.

Also, each differential transformer 32 is arranged directly above the corresponding shackle spring 23. Therefore, an increase in the number of parts can be suppressed and the configuration can be simplified.

Further, the display unit 39 is arranged at a position where the nut 26 can be visually recognized from a position where it can be operated. Therefore, it is possible to operate the corresponding nut 26 while checking the tension of each suspension 5, and it is possible to improve the workability of the tension adjustment work.

Note that the number of suspension bodies 5 is not limited to seven. When the number of suspension bodies 5 is 6, the shackle rods 22, that is, the base holes 21a are arranged as shown in FIG. 11, for example. In this case, this can be dealt with by omitting the first connecting member 34 on the right side of FIG. 2, the wire 37 and the differential transformer 32 corresponding thereto.

Further, when the number of suspension bodies 5 is 5, the arrangement of the shackle rods 22, that is, the arrangement of the base holes 21a is as shown in FIG. 12, for example. In this case, the second connecting member 35 on the right side of FIG. 2 and the third connecting member 36 on the right end, and the wires 37 and the differential transformer 32 corresponding to them are omitted. Then, the first connecting member 34 on the right side, and the wire 37 and the differential transformer 32 corresponding to the first connecting member 34 can be shifted to the left side to cope with the situation.

Embodiment 2.
Next, FIG. 13 is a front view showing an elevator tension measuring device according to a second embodiment of the present invention. In the second embodiment, all the connecting members 34, 35, 36, all the wires 37, and all the raising members 38 are omitted. The second upper beam 31d is also omitted. Thereby, the three differential transformers 32 in the rear row are attached to the back side of the first upper beam 31c.

Moreover, all the differential transformers 32 are installed upside down from the first embodiment. The core shaft 32b of each differential transformer 32 is in contact with the upper end of the corresponding shackle spring 23 via the corresponding spring bearing 25.

For example, when one of the upper ends of the shackle springs 23 is displaced downward, the core spring 32b is pushed downward by the transformer spring 32c of the corresponding differential transformer 32. Further, when any one of the upper ends of the shackle springs 23 is displaced upward, the corresponding core shaft 32b is pushed upward. Other configurations and operations are similar to those of the first embodiment.

Even with such a configuration, the tension of the suspension 5 can be measured stably over a longer period of time. Further, the tensions of the plurality of suspension bodies 5 can be individually grasped, and the looseness of the suspension bodies 5 can be individually coped with. Further, the configuration can be simplified as compared with the first embodiment.

Embodiment 3.
Next, FIG. 14 is a front view showing an elevator tension measuring device according to a third embodiment of the present invention. In the third embodiment, the third connecting member 36 is used for all the shackle springs 23. However, the difference between the vertical position of the differential transformer 32 in the front row and the vertical position of the differential transformer 32 in the rear row is larger than that of the third connection member 36 in the rear row by the third connection member 36 in the front row. It's getting shorter.

Also, all the raising members 38 are omitted, and the vertical positions of all the nuts 26 are the same. Other configurations and operations are similar to those of the first embodiment.

Even with such a configuration, the tension of the suspension 5 can be measured stably over a longer period of time. Further, the tensions of the plurality of suspension bodies 5 can be individually grasped, and the looseness of the suspension bodies 5 can be individually coped with. Further, compared to the first embodiment, the number of types of parts can be reduced and the configuration can be simplified.

Fourth Embodiment
Next, FIG. 15 is a front view showing an elevator tension measuring device according to a fourth embodiment of the present invention. In the fourth embodiment, the third connecting member 36 is used for all the shackle springs 23. The lengths of all the third connecting members 36 are the same.

A mounting plate 31e is fixed to the upper part of the frame 31. All the differential transformers 32, the measuring unit 33, and the display unit 39 are fixed to the mounting plate 31e. The displacement direction of the core shaft 32b of each differential transformer 32 is the horizontal direction.

A plurality of pulleys 40 as turning members are attached to the attachment plate 31e. Each pulley 40 is arranged directly above the corresponding third connecting member 36. Moreover, each pulley 40 is rotatable about a horizontal axis. A corresponding wire 37 is hung on each pulley 40. Further, each pulley 40 changes the direction of the corresponding wire 37 by 90 degrees or about 90 degrees.

The four differential transformers 32 and the four pulleys 40 corresponding to the four shackle springs 23 in the front row are arranged on the front side of the mounting plate 31e. The three differential transformers 32 and the three pulleys 40 corresponding to the three shackle springs 23 in the rear row are arranged on the back side of the mounting plate 31e. Other configurations and operations are similar to those of the first embodiment.

Even with such a configuration, the tension of the suspension 5 can be measured stably over a longer period of time. Further, the tensions of the plurality of suspension bodies 5 can be individually grasped, and the looseness of the suspension bodies 5 can be individually coped with. Further, the overall height dimension can be suppressed as compared with the third embodiment.

Note that, also in the second to fourth embodiments, the number of suspension bodies 5 is not limited to seven.

Moreover, the turning member is not limited to the pulley. For example, the transmission member may be slid along the guide surface of the turning member fixed to the frame.

The turning member of the fourth embodiment may be applied to the configurations of the first and third embodiments.

The transmission member may be a member other than the wire as long as it is a flexible string-shaped or belt-shaped member.

Also, the displacement meter is not limited to the differential transformer, and may be a laser displacement meter, a magnetic displacement meter, an eddy current displacement meter, or the like. When using a non-contact type displacement meter, the transmission member and the connecting member can be omitted. Further, when a non-contact type displacement meter is used, the connecting member may be connected to a shackle spring and the displacement of the connecting member may be detected by the non-contact type displacement meter.

The display unit 39 may be configured separately from the measuring unit 33.

Moreover, the configuration of the elevator to which the tension measuring device of the present invention is applied is not limited to the configuration of FIG. For example, as shown in FIG. 16, the present invention can be applied to an elevator in which the hoisting machine 2 is installed in the machine room 16. In FIG. 16, the hoisting machine 2 and the tension measuring device 12 are installed on the machine stand 17 installed in the machine room 16.

Also, the roping method is not limited to 2:1 roping, and may be 1:1 roping, for example.

Also, the present invention can be applied to various types of elevators such as double deck elevators and one-shaft multi-car elevators. The one-shaft multi-car system is a system in which an upper car and a lower car arranged directly below the upper car independently move up and down a common hoistway.

5 suspension, 12 tension measuring device, 22 shackle rod, 23 shackle spring, 26 nut, 32 differential transformer (displacement meter), 33 measuring part, 34 first connecting member, 34d first opening, 35 second Connection member, 35d second opening, 36 third connection member, 37 wire (transmission member), 38 padding member, 39 indicator, 40 pulley (turning member).

Claims (9)

1. Multiple shackle rods, each connected to a corresponding suspension,
   A plurality of shackle springs through which the corresponding shackle rods pass,
   A plurality of nuts each screwed into the corresponding shackle rod,
   An elevator including a plurality of displacement gauges that respectively detect expansion and contraction of the corresponding shackle springs, and a measurement unit that individually measures the tension of each of the plurality of suspension bodies based on signals from the plurality of displacement gauges. Tension measuring device.
2. The tension measuring device for an elevator according to claim 1, further comprising a plurality of connecting members that are respectively connected to the plurality of shackle springs and that are displaced as the corresponding shackle springs expand and contract.
3. A plurality of transmissions that are respectively connected between the plurality of connecting members and the plurality of displacement gauges and have flexibility and that transmit the displacement of the corresponding connecting member to the corresponding displacement gauges. The elevator tension measuring device according to claim 2, further comprising a member.
4. The tension measuring device for an elevator according to claim 3, wherein a connecting portion between each of the transmitting members and the corresponding connecting member is located on an extension of a central axis of the corresponding shackle spring.
5. The plurality of shackle rods are arranged in a front row and a rear row,
   At least one of the connecting members arranged in the front row has a C shape having an opening in an intermediate portion in the vertical direction,
   5. The elevator tension measuring device according to claim 3, wherein at least one of the nuts arranged in the rear row is located at the same height as the opening.
6. The tension measuring device for an elevator according to claim 5, wherein a raising member for raising the position of the corresponding nut is provided between at least one of the shackle springs arranged in the rear row and the nut.
7. The tension measuring device for an elevator according to any one of claims 1 to 6, wherein each of the displacement gauges is arranged directly above the corresponding shackle spring.
8. 7. The plurality of turning members, which are arranged right above each of the connecting members, are provided with the corresponding transmitting members, and change the direction of the corresponding transmitting members. An elevator tension measuring device according to any one of items 1 to 7.
9. 9. The nut according to claim 1, further comprising a display unit that is arranged at a position where the nut can be visually recognized from a position where the nut can be operated, and further includes a display unit that displays a measurement result of the measurement unit. Elevator tension measuring device.

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