WO2018109881A1 - Tension support device for elevator - Google Patents

Abstract

A tension support device for an elevator is provided with a plurality of extendable separate cylinders, piping, and a fluid resistance part. The separate cylinders are each filled with a fluid. Also, each separate cylinder bears the tension of a corresponding suspension body among a plurality of suspension bodies from which a car is suspended. The piping connects the fluid in the plurality of separate cylinders into one. The fluid resistance part is provided to the piping and imparts resistance to the movement of the fluid.

Description

Elevator tension support device

The present invention relates to an elevator tension support device which is provided at an end of a suspension body for suspending a car and supports tension acting on the suspension body.

Generally, an elevator car is supported by a plurality of ropes. With long-term operation, the load applied to the rope, that is, the tension of the rope becomes uneven due to variations in the elongation of each rope. If the tension of the rope remains unequal, the load applied to the rope with high tension becomes larger than the load applied to the rope with low tension, and the life of the rope and sheave is reduced.

As a method of eliminating such tension unevenness, a method of adjusting the tension by the hand of an operator at every maintenance inspection is known.

In contrast, in a conventional elevator car suspension mechanism, a hydraulic cylinder is provided below each coil spring. Each hydraulic cylinder is filled with hydraulic oil. Each hydraulic cylinder is connected by a high-pressure pipe. Hydraulic oil flows into the hydraulic cylinder whose pressure has dropped due to the extension of the main rope from the hydraulic cylinder where the main rope does not extend via the high-pressure pipe. Thereby, the pressure inside the fluid cylinder is made uniform, and the tension of the main rope is also made uniform (for example, refer to Patent Document 1).

Also, in the conventional elevator main rope automatic tension adjusting device, the base is fixed to the lower surface of the upper frame of the counterweight. Three cylinders are fixed to the lower surface of the base. In each cylinder, hydraulic oil is put and a piston is inserted. A corresponding thimble rod is fixed to each piston. The three cylinders are connected by a connecting pipe (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 7-232728 JP-A-8-231155

In the conventional configuration as shown in Patent Documents 1 and 2, since the hydraulic cylinders are only directly connected to each other, if the car or the rope vibrates, the vibration will continue. In addition, vibration generated in one rope is transmitted to other ropes.

The present invention has been made to solve the above-described problems, and provides an elevator tension support device capable of reducing vibration of a suspension while automatically equalizing the tension of the suspension. With the goal.

The elevator tension supporting device according to the present invention is filled with a fluid, and a plurality of extendable individual cylinders and a plurality of individual cylinders receiving a tension of a corresponding suspension among a plurality of suspensions for suspending a car. A pipe that connects the fluid in the cylinder into one, and a fluid resistance section that is provided in the pipe and provides resistance to fluid movement.

In the elevator tension support device according to the present invention, a plurality of individual cylinders are connected by piping, and a fluid resistance portion is provided in the piping, so that the tension of the suspension is automatically equalized. Vibration can be reduced.

1 is a schematic configuration diagram illustrating an elevator according to Embodiment 1 of the present invention. It is a side view which expands and shows the counterweight side tension | tensile_strength support apparatus of FIG. It is a front view which expands and shows the cage | basket | car tension support apparatus of FIG. FIG. 4 is a cross-sectional view of the orifice of FIG. 3. It is sectional drawing which shows the cross section of the cage | basket | car tension support apparatus in the position of the separate cylinder of FIG. It is explanatory drawing which shows typically arrangement | positioning of the orifice for reducing the vibration in the same phase of the rope of FIG. FIG. 7 is a front view showing a state where the leftmost individual cylinder is contracted in the arrangement of the orifices of FIG. 6. It is a front view which shows the state by which the coil spring of FIG. 7 was compressed. It is a front view which shows the state which the individual cylinder of the center of FIG. 8 extended. It is a front view which shows the state which the common cylinder of FIG. 9 shrunk. It is explanatory drawing which shows typically the example which has arrange | positioned the same number of orifices as a rope to common piping. It is explanatory drawing which shows typically the example which has arrange | positioned the orifice to each branch piping. It is a schematic block diagram which shows the elevator by Embodiment 2 of this invention. It is a front view which expands and shows the cage | basket | car tension support apparatus of FIG. It is a front view which shows the cage | basket | car tension support apparatus by Embodiment 3 of this invention. FIG. 16 is an explanatory diagram schematically showing the arrangement of orifices in FIG. 15. It is a front view which shows the cage | basket | car tension support apparatus by Embodiment 4 of this invention. It is a graph which shows the characteristic of the disc spring of FIG. 17 compared with a coil spring. It is a front view which shows the cage | basket | car tension support apparatus by Embodiment 5 of this invention. It is a front view which shows the cage | basket | car tension support apparatus by Embodiment 6 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram showing an elevator according to Embodiment 1 of the present invention, and shows a 2: 1 roping type machine room-less elevator. In the figure, a hoisting machine 2 is provided in the upper part of the hoistway 1. The hoisting machine 2 includes a drive sheave 3, a hoisting machine motor (not shown) that rotates the driving sheave 3, and a hoisting machine brake (not shown) that brakes the rotation of the driving sheave 3.

A plurality of ropes 4 as suspensions are wound around the drive sheave 3. The car 5 and the counterweight 6 are suspended in the hoistway 1 by the rope 4. Further, the car 5 and the counterweight 6 move up and down in the hoistway 1 by rotating the drive sheave 3.

In the hoistway 1, a pair of car guide rails (not shown) for guiding the raising and lowering of the car 5 and a pair of counterweight guide rails (not shown) for guiding the raising and lowering of the counterweight 6 are installed. ing.

The car 5 is provided with a first car suspension car 7a and a second car suspension car 7b. The counterweight 6 is provided with a first counterweight suspension vehicle 8a and a second counterweight suspension vehicle 8b.

A car side tension support device 9 and a counterweight side tension support device 10 are provided in the upper part of the hoistway 1. A first end portion of the rope 4 is connected to the car-side tension support device 9. A second end portion of the rope 4 is connected to the counterweight-side tension support device 10.

The rope 4 includes, in order from the first end side, the first car suspension wheel 7a, the second car suspension wheel 7b, the drive sheave 3, the first counterweight suspension car 8a, and the second counterweight. It is wound around the suspension wheel 8b.

FIG. 2 is an enlarged side view showing the counterweight-side tension support device 10 of FIG. The counterweight tension support device 10 includes a base 11 and the same number of support device bodies 12 as the ropes 4. In FIG. 2, only one supporting device main body 12 is shown. The base 11 is horizontally fixed to the upper part in the hoistway 1.

Each support device main body 12 has a rod 13, a spring seat 14, a spring receiver 15, a coil spring 16, and a pair of nuts 17.

The second end of the corresponding rope 4 is connected to the lower end of the rod 13. The rod 13 passes through the base 11, the spring seat 14, the coil spring 16, the spring receiver 15, and the two nuts 17 in order from the bottom.

The spring seat 14 is placed on the base 11. The coil spring 16 is sandwiched between the spring seat 14 and the spring receiver 15. A screw portion is provided at the upper end portion of the rod 13. Two nuts 17 are screwed into the threaded portion of the rod 13. This prevents the spring receiver 15 from coming off the rod 13.

FIG. 3 is an enlarged front view showing the car-side tension support device 9 of FIG. The car-side tension support device 9 includes a base 21, a plurality of rods 22, a plurality of extendable individual cylinders 23, a plurality of nuts 24, a common pipe 25, a plurality of connectors 26, a plurality of branch pipes 27, and a fluid resistance section. The plurality of orifices 28 and the expansion / contraction part 29 are provided.

The base 21 is horizontally fixed to the upper part in the hoistway 1. The base 21 is supported by at least a part of, for example, a car guide rail and a counterweight guide rail.

The first end of the corresponding rope 4 is connected to the lower end of each rod 22. Each rod 22 passes through the base 21 and the corresponding individual cylinder 23. A threaded portion is provided at the upper end of each rod 22. Two nuts 24 are screwed into the thread portion of each rod 22.

Each individual cylinder 23 has an individual tube 31 fixed on the base 21 and an individual shaft 32 inserted into the individual tube 31. The individual shaft 32 can move up and down with respect to the individual tube 31. Each individual cylinder 23 expands and contracts in the vertical direction when the individual shaft 32 moves up and down. Removal of the individual shaft 32 from the rod 22 is prevented by the nut 24.

The inside of each individual cylinder 23 is filled with fluid. For example, oil is used as the fluid. With such a configuration, each individual cylinder 23 receives the tension of the corresponding rope 4 via the corresponding rod 22.

Each individual cylinder 23 is connected to a common pipe 25 via a connector 26 and a branch pipe 27. The common pipe 25 and the branch pipe 27 connect all the fluids in the individual cylinders 23 to one. As the common pipe 25 and the branch pipe 27, for example, a high pressure rubber hose or a metal pipe can be used.

The orifices 28 are provided in the common pipe 25 at intervals. The orifice 28 has a cross section as shown in FIG. 4, for example, and provides resistance to fluid movement (arrows in FIG. 4).

The expansion / contraction part 29 has the frame 33, the common cylinder 34 which can be expanded-contracted, and the coil spring 35 which is an elastic body and is a solid spring. The frame 33 is fixed on the base 21. The common cylinder 34 is fixed on the frame 33. The frame 33 is provided with a facing portion 33 a that faces the upper surface of the common cylinder 34.

The coil spring 35 is interposed between the upper surface of the common cylinder 34 and the facing portion 33a. As a result, the coil spring 35 expands and contracts due to the expansion and contraction of the common cylinder 34. That is, the coil spring 35 is compressed when the common cylinder 34 is extended, and is extended when the common cylinder 34 is contracted.

The common cylinder 34 has a common tube 36 fixed to the frame 33 and a common shaft 37 inserted into the common tube 36. The common shaft 37 can move up and down with respect to the common tube 36. The common cylinder 34 expands and contracts in the vertical direction when the common shaft 37 moves up and down.

The common pipe 25 is connected to the common tube 36. The common cylinder 34 is filled with fluid. That is, the common cylinder 34 is connected to all the individual cylinders 23 via the common pipe 25 and the branch pipe 27. The coil spring 35 is elastically deformed according to the pressure of the fluid in the common pipe 25.

FIG. 5 is a cross-sectional view showing a cross section of the car-side tension support device 9 at the position of the individual cylinder 23 in FIG. 3, and only one orifice 28 is shown. Each individual tube 31 has a double tube structure having a cylindrical inner tube portion 31a and a cylindrical outer tube portion 31b surrounding the inner tube portion 31a. The fluid is filled in a cylindrical space 31c between the inner cylinder portion 31a and the outer cylinder portion 31b.

Further, the cylindrical portion 32 a of each individual shaft 32 is inserted into the cylindrical space 31 c of the corresponding individual tube 31. The structure of the common cylinder 34 is the same as that of the individual cylinder 23.

In such a car-side tension support device 9, since all the individual cylinders 23 are connected by the common pipe 25, the tension of the rope 4 can be automatically equalized. Moreover, since the orifice 28 is provided in the common piping 25, the vibration of the rope 4 can be reduced. That is, when the individual cylinder 23 vibrates separately, such as when only one individual cylinder 23 vibrates or when two or more individual cylinders 23 vibrate with a phase difference, the fluid passes through the orifice 28. The vibration is attenuated by the resistance.

In addition, when all the ropes 4 vibrate with the same amplitude and the same phase, the common cylinder 34 expands and contracts and the fluid flows through the common pipe 25. Therefore, the vibration of the rope 4 can be reduced by the orifice 28.

Furthermore, since the common cylinder 34 and the coil spring 35 are combined, the configuration of the expansion / contraction part 29 can be simplified.

The causes of the vibration of the rope 4 include passenger getting on and off the car 5, torque ripple of the hoist motor, friction of the guide, uneven wear of the drive sheave 3, surging of the rope 4 itself, emergency stop of the car 5, And excitation from a building. In addition, the vibration from the building is caused by an earthquake or a strong wind.

Here, the number and position of the orifices 28 will be described. The orifice 28 is preferably arranged at a portion where the fluid flows in both cases where the plurality of ropes 4 vibrate with a phase difference and when the ropes vibrate in the same phase.

First, when all the individual cylinders 23 move in the same phase, the fluid always moves in any part of the common pipe 25 as shown in FIG. 6, so if there is an orifice 28 in one place, the vibration is attenuated. Can do.

Next, when the rope 4 vibrates with a phase difference, the vibration can be damped if there is one orifice 28 in front of the common cylinder 34 of the telescopic portion 29. As an example, the case where the left individual cylinder 23 contracts downward and the central individual cylinder 23 extends upward in the arrangement of the orifice 28 in FIG. 6 will be described.

As shown in FIG. 7, when the leftmost individual cylinder 23 contracts, the pressure in the common pipe 25 increases. As a result, as shown in FIG. 8, the coil spring 35 of the expansion / contraction part 29 that is relatively softer than the individual cylinder 23 is compressed, and the fluid flows into the common cylinder 34.

Thereafter, as shown in FIG. 9, the central individual cylinder 23 is extended, and the pressure in the common pipe 25 is restored. At this time, the fluid in the common cylinder 34 flows to the common pipe 25, and the fluid in the common pipe 25 flows to the central individual cylinder 23. Then, as shown in FIG. 10, the common cylinder 34 contracts.

Thus, since fluid enters and exits the common cylinder 34, vibration can be damped if there is an orifice 28 in a portion adjacent to the common cylinder 34 of the common pipe 25.

However, the rope stiffness varies depending on the car position. For example, when the car 5 is located on the lowest floor, the length of the portion of the rope 4 that suspends the car 5 is increased, and the rope rigidity is reduced. In this case, when the individual cylinder 23 at the left end in FIG. 7 is contracted, the rope 4 itself at the center and the right end in FIG. 8 is also elastically deformed. And the attenuation effect is reduced.

For this reason, as shown in FIG. 11 or FIG. 12, if the same number of orifices 28 as the number of ropes 4 are installed, the damping effect can be improved more reliably regardless of the rope rigidity. FIG. 11 is an explanatory view showing an example in which the same number of orifices 28 as the ropes 4 are arranged in the common pipe 25, which is the same arrangement as FIG. FIG. 12 shows an example in which an orifice 28 is arranged in each branch pipe 27, and such an arrangement may be adopted.

In the first embodiment, the base 21 is fixed to the upper part in the hoistway 1. However, in an elevator having a machine room, the base may be fixed to the machine room floor or the machine room floor may be used as the base. .

Embodiment 2. FIG.
Next, FIG. 13 is a schematic configuration diagram showing an elevator according to Embodiment 2 of the present invention. In the first embodiment, the 2: 1 roping elevator is shown, but in the second embodiment, the 1: 1 roping elevator is shown. For the sake of simplicity, parts having the same names as those in Embodiment 1 will be described with the same reference numerals.

A machine room 18 is provided in the upper part of the hoistway 1. The hoisting machine 2 is installed in the machine room 18.

The car 5 has a car frame 51 and a car room 52 supported by the car frame 51. The car frame 51 has an upper beam 53 disposed horizontally above the car room 52. The first end of the rope 4 is connected to the upper beam 53. Thus, the car-side tension support device 9 is provided on the upper part of the car 5.

The second end of the rope 4 is connected to the upper part of the counterweight 6. Thus, the counterweight-side tension support device 10 is provided on the upper portion of the counterweight 6.

FIG. 14 is an enlarged front view showing the car-side tension support device 9 of FIG. The basic configuration of the car-side tension support device 9 is the same as that of the first embodiment, but the point that the individual cylinder 23 is fixed to the upper beam 53 in the upside down direction with respect to the first embodiment is the first embodiment. Is different. The stretchable portion 29 is fixed on the cab 52. Other configurations are the same as those in the first embodiment.

Thus, the car-side tension support device 9 of the present invention can also be installed in a 1: 1 roping elevator, and the same effect as in the first embodiment can be obtained.

In the second embodiment, the stretchable part 29 is fixed on the car room 52, but the fixing place is not limited to this, and may be fixed to the side surface of the car frame 51, for example.
Further, the arrangement of the orifices 28 is not limited to that shown in FIG. 14, and for example, the arrangement shown in FIG. 6 or FIG. 12 is also possible.

Embodiment 3 FIG.
Next, FIG. 15 is a front view showing a car-side tension support device according to Embodiment 3 of the present invention. In the third embodiment, the stretchable portion 29 of the first embodiment is omitted. The orifice 28 is disposed at a portion connecting the adjacent individual cylinders 23 of the common pipe 25. Other configurations are the same as those in the first embodiment.

Even with such a configuration, it is possible to reduce the vibration of the rope 4 while automatically equalizing the tension of the rope 4. In addition, the configuration can be simplified.

Here, the configuration of the embodiment 3 mainly assumes a case where the rope 4 vibrates with a phase difference. In this case, in order to always generate fluid resistance regardless of which rope 4 vibrates, as shown in FIG. Therefore, “the number of ropes−1” is the minimum number of orifices.

Note that the car-side tension support device of the third embodiment can also be applied to a 1: 1 roping elevator as shown in FIG.

Embodiment 4 FIG.
Next, FIG. 17 is a front view showing a car-side tension support device according to Embodiment 4 of the present invention. In the fourth embodiment, a disc spring 38 which is an elastic body and a solid spring is used instead of the coil spring 35 of the first embodiment. In FIG. 17, a laminated body in which a plurality of disc springs 38 are stacked in series is interposed between the upper surface of the common cylinder 34 and the facing portion 33a. Other configurations are the same as those in the first embodiment.

Even with such a configuration, it is possible to reduce the vibration of the rope 4 while automatically equalizing the tension of the rope 4.

Further, even when all the ropes 4 vibrate with the same amplitude and the same phase, the common cylinder 34 expands and contracts and the fluid flows through the common pipe 25. Therefore, the vibration of the rope 4 can be reduced by the orifice 28.

Here, since the weight of the car 5 is first added to the elastic body of the expansion / contraction part 29, a certain degree of spring rigidity is required. On the other hand, the load of the vibration generated in the rope 4 is smaller than the weight of the car 5, and if the damping effect is increased with respect to the vibration, the rigidity of the elastic body of the stretchable portion 29 is lowered to reduce the load fluctuation. However, it is necessary to make the elastic body easy to deform.

Thus, the elastic body of the stretchable part 29 is required to have contradictory performance. For this reason, when using a spring having characteristics close to linear, such as the coil spring 35, the rigidity of the coil spring 35 is actually increased to support the weight of the car 5. Then, when the load variation is relatively small due to the vibration of the rope 4, the amount of deformation of the coil spring 35 is small, so the cross-sectional area of the common cylinder 34 is increased, that is, the diameter of the common cylinder 34 is increased.

Therefore, it is preferable to increase the damping effect by increasing the volume change due to expansion and contraction of the common cylinder 34 and ensuring a sufficient flow rate.

In contrast, the disc spring 38 has a non-linear characteristic as shown in FIG. The disc spring 38 becomes less rigid as the load received increases (the slope of the line in FIG. 18 becomes smaller). For this reason, in addition to being able to reduce the amount of deformation of the car 5 due to its own weight, it is possible to secure a large amount of deformation against a load change caused by the vibration of the rope 4.

Therefore, by using the disc spring 38, a sufficient flow rate can be secured even if the dimensions of the common cylinder 34 are small, and the entire apparatus can be downsized.

In the fourth embodiment, the disc spring 38 is shown as a solid spring. However, any other spring may be used as long as it has a characteristic as shown in FIG.
Further, the car-side tension support device of the fourth embodiment can be applied to a 1: 1 roping elevator as shown in FIG.

Embodiment 5 FIG.
Next, FIG. 19 is a front view showing a car-side tension support device according to Embodiment 5 of the present invention. In the fifth embodiment, a container 39 is connected to the common pipe 25. The inside of the container 39 is connected to all the individual cylinders 23 through the common pipe 25, the branch pipe 27 and the connector 26. A gas whose volume changes according to the pressure of the fluid in the common pipe 25, for example, air, is enclosed in the upper part of the fluid in the container 39. Other configurations are the same as those in the first embodiment.

Even with such a configuration, it is possible to reduce the vibration of the rope 4 while automatically equalizing the tension of the rope 4.

Further, even when all the ropes 4 vibrate with the same amplitude and the same phase, the volume of air in the container 39 changes and the fluid flows through the common pipe 25, so that the vibration of the rope 4 is reduced by the orifice 28. be able to.

Furthermore, since the expansion / contraction part is comprised only by the container 39, a structure can be simplified.

The car-side tension support device of the fifth embodiment can be applied to a 1: 1 roping elevator as shown in FIG.
In the first to fifth embodiments, a coil spring may be interposed between the nut 24 and the individual cylinder 23.

Embodiment 6 FIG.
Next, FIG. 20 is a front view showing a car-side tension support device according to Embodiment 6 of the present invention. In the sixth embodiment, coil springs 40a, 40b, and 40c as elastic bodies are provided between the individual cylinder 23 and the rope 4 of the third embodiment, respectively. Specifically, the coil springs 40 a, 40 b, and 40 c are sandwiched between the nut 24 and the upper surface of the individual shaft 32.

Further, the rigidity of the coil springs 40a, 40b, and 40c is different from each other. That is, coil springs 40 a, 40 b and 40 c having different rigidity for each rope 4 are arranged in series in the individual cylinder 23. Other configurations are the same as those of the third embodiment.

Even with such a configuration, it is possible to reduce the vibration of the rope 4 while automatically equalizing the tension of the rope 4.

Further, when all the ropes 4 vibrate with the same amplitude and the same phase, the expansion / contraction amount of the individual cylinder 23 changes for each rope 4 due to the difference in rigidity of the springs 40a, 40b, and 40c. Thereby, the fluid flows through the common pipe 25, and the vibration of the rope 4 can be reduced by the orifice 28.

Here, in the sixth embodiment, when all the ropes 4 are moved in the same phase, the fluid flows in any part of the piping. Therefore, if there is at least one orifice 28, a damping effect can be obtained. However, if there is a phase difference, there is a possibility that only two pieces may move as in the third embodiment, so “number of ropes−1” is the minimum number of orifices.

Note that the car-side tension support device of the sixth embodiment can also be applied to a 1: 1 roping elevator as shown in FIG.
Moreover, the elastic body of Embodiment 6 is not limited to the coil springs 40a, 40b, and 40c.

Furthermore, the fluid resistance portion is not limited to the orifice, and may be, for example, a structure in which a part of the common pipe is bent.
Furthermore, the suspension body may be a belt.
In the first to sixth embodiments, the car-side tension support device has been described. However, even if the present invention is applied to a counterweight-side tension support device, the car-side tension support device and the counterweight tension-supporting device You may apply to both.
Furthermore, the layout of the elevator to which the present invention is applied is not limited to FIGS. For example, the present invention can be applied to a machine room-less elevator in which a hoisting machine is disposed in a lower part of a hoistway and a 2: 1 roping type elevator having a machine room.
Furthermore, the present invention can be applied to all types of elevators such as a double deck elevator and a one-shaft multi-car elevator. The one-shaft multi-car system is a system in which the upper car and the lower car arranged directly below the upper car are independently raised and lowered on a common hoistway.

4 rope (suspension), 5 cage, 9 cage side tension support device, 23 individual cylinders, 25 common piping, 27 branch piping, 28 orifice (fluid resistance portion), 29 expansion / contraction portion, 34 common cylinder, 35 coil spring (elastic) Body), 38 disc spring (elastic body), 39 container, 40a, 40b, 40c coil spring (elastic body).

Claims (8)

A plurality of extendable individual cylinders, each filled with fluid and receiving the tension of the corresponding one of the plurality of suspensions for suspending the car;
A tension support device for an elevator, comprising: a pipe that connects fluids in the plurality of individual cylinders into one; and a fluid resistance section that is provided in the pipe and provides resistance to fluid movement. The tension support device for an elevator according to claim 1, further comprising an expansion / contraction part connected to the pipe and having an elastic body that is elastically deformed according to a pressure of a fluid in the pipe. The stretchable part is
A stretchable common cylinder that is filled with fluid and is connected to the plurality of individual cylinders via the piping;
The elevator tension support device according to claim 2, further comprising: a solid spring as the elastic body that expands and contracts by expansion and contraction of the common cylinder. The elevator tension support device according to claim 3, wherein the spring is a coil spring. The elevator tension supporting device according to claim 3, wherein the spring is a disc spring. Further comprising a container connected to the pipe;
The elevator tension support device according to claim 1, wherein a gas whose volume changes according to the pressure of the fluid in the pipe is enclosed in an upper portion of the fluid in the container. A plurality of elastic bodies interposed between the plurality of suspension bodies and the plurality of individual cylinders;
The elevator tension support device according to claim 1, wherein the plurality of elastic bodies have different rigidity. The elevator tension support device according to any one of claims 1 to 7, wherein the fluid resistance portion includes at least one orifice.

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