Main rope vibration suppression device

Abstract

To provide a main rope sway suppression device capable of appropriately suppressing lateral sway of the main rope. [Solution] The main rope sway suppression device 30 comprises a pulley (first pulley) 44 arranged around the car side main rope group 12A above the car 14, a long member 43 arranged below the pulley 44 and rotatably supported, and an actuator (drive unit) 48 that rotates the long member 43 in the vertical direction, and the actuator 48 rotates the long member 48 in the vertical direction, thereby pulling the car side main rope group 12A via a sway suppression rope (first sway suppression rope) 52 that is hung across the pulley 44 and has one end connected to the car side main rope group 12A and the other end connected to the right end (first end) 43R of the long member 43.

Description

[Technical Field]

[0001] The present invention relates to a main rope sway suppression device, and more particularly to a sway suppression device that suppresses the sway of a main rope caused by the shaking of a building due to an earthquake or the like. [Background technology]

[0002] In rope elevators installed in high-rise buildings, a machine room is often installed directly above the car hoistway, and a hoisting machine that drives the car is installed in this machine room. A main rope is hung on a sheave that constitutes part of this hoisting machine, and a passenger car is connected to one end of the main rope and a counterweight to the other end, and both are suspended by the main rope. The passenger car is guided by a pair of car guide rails laid vertically, and is configured to rise and fall by rotating the sheave of the hoisting machine forward or backward.

[0003] In an elevator with this configuration, for example, when the building shakes due to long-period seismic motion, the main rope suspending the elevator car from the top of the building also experiences horizontal vibration in approximately the same direction as the building's vibration (hereinafter, this horizontal vibration of the main rope will be referred to as "lateral vibration").

[0004] Conventionally, the magnitude of the main rope's vibration is estimated from the magnitude of the building's shaking detected by a long-period vibration sensor installed in the building, and elevator control operation is carried out depending on the magnitude of the main rope's vibration, such as temporarily stopping elevator operation.

[0005] However, even after the building's shaking has subsided, there is a problem in that normal elevator operation cannot be resumed until the main rope's vibration has settled. Furthermore, if the main rope resonates with the frequency of building shaking caused by an earthquake or strong wind, the main rope's vibration may become larger. In such a case, the main rope may come into contact with and damage equipment installed in the hoistway. Furthermore, if the equipment is damaged, repair work by maintenance personnel or the like is required, which results in a longer period of time before normal operation can be resumed.

[0006] In this regard, Patent Document 1 discloses a main rope sway suppression device in which a sway suppression rope is connected to a clamp (connecting device) attached to the main rope, and is hung on pulleys that extend diagonally downward from the clamps at both ends and are installed at opposing corners of the top surface of the car so that the rotation direction is up and down, and is connected to an actuator in the center of the top surface of the car, and the actuator is rotated and pulled in a horizontal direction approaching one of the corners, thereby vibrating the clamp and suppressing lateral sway of the main rope. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 3-51279 Summary of the Invention [Problem to be solved by the invention]

[0008] The sway suppression device described in Patent Document 1 is configured to pull a sway suppression rope that is hung on a pulley installed at the corner of the top surface of the car so that the rotation direction is vertical, via an actuator that rotates the sway suppression rope horizontally.

[0009] In other words, since the rotation direction of the actuator is perpendicular to the rotation direction of the pulley, there is a problem that the sway suppression rope is likely to fall off the pulley and the lateral sway of the main rope cannot be properly suppressed.

[0010] An object of the present invention is to provide a main rope sway suppression device that can appropriately suppress lateral sway of the main rope. [Means for solving the problem]

[0011] The main rope sway suppression device of the present invention is a main rope sway suppression device that suppresses sway of the main rope that suspends an elevator car when sway occurs in the main rope, and includes a first pulley arranged around the main rope above the car, a long member that is arranged below the first pulley and supported so as to be rotatable, and a drive unit that rotates the long member in the vertical direction. a second pulley arranged to face the first pulley with the main rope sandwiched therebetween; The drive unit rotates the long member in the vertical direction, thereby pulling the main rope via a first vibration suppression rope that is hung over the first pulley and has one end connected to the main rope and the other end connected to the first end of the long member. A second vibration suppression rope is connected to the second end of the long member, and the second vibration suppression rope is connected to the main rope at one end while being stretched over the second pulley. It is something.

[0012] The present invention of Main rope vibration suppression device is a main rope sway suppression device that suppresses sway of the main rope that suspends an elevator car when sway occurs in the main rope, and is equipped with a first pulley arranged around the main rope above the car, a long member that is arranged below the first pulley and rotatably supported, and a drive unit that rotates the long member in the vertical direction, and the drive unit rotates the long member in the vertical direction, thereby pulling the main rope via a first sway suppression rope that is hung across the first pulley and has one end connected to the main rope and the other end connected to a first end of the long member, and a first tensioning unit that applies tension to the first sway suppression rope is provided at the first end of the long member.

[0013] The present invention of The main rope vibration suppression device is This is a main rope sway suppression device that suppresses sway of the main rope that suspends an elevator car when sway occurs in the main rope. The device comprises: a first pulley arranged around the main rope above the car; a long member arranged below the first pulley and rotatably supported; a drive unit that rotates the long member in the vertical direction; and a second pulley arranged to face the first pulley with the main rope sandwiched between them. The drive unit rotates the long member in the vertical direction, thereby pulling the main rope via a first sway suppression rope that is hung over the first pulley and has one end connected to the main rope and the other end connected to a first end of the long member. A second sway suppression rope is connected to the second end of the long member. The second end of the long member is hung over a second pulley and has one end connected to the main rope. A second tensioning unit that applies tension to the second sway suppression rope is provided at the second end of the long member.

[0014] The present invention of The main rope vibration suppression device is This is a main rope sway suppression device that suppresses sway in the event of sway in the main rope that suspends an elevator car. The device comprises a first pulley arranged around the main rope above the car, a long member that is arranged below the first pulley and rotatably supported, and a drive unit that rotates the long member in the vertical direction. The drive unit rotates the long member in the vertical direction, thereby pulling the main rope via a first sway suppression rope that is hung across the first pulley and has one end connected to the main rope and the other end connected to a first end of the long member. The drive unit has a drive arm that expands and contracts in the vertical direction, and the first end of the long member is provided with an engagement unit that engages the drive arm so that it can slide in the longitudinal direction of the long member. [Effects of the Invention]

[0016] According to the main rope sway suppression device of the present invention, the first sway suppression rope is stretched across the first pulley arranged around the main rope above the car and pulled downward via a long member arranged below the first pulley. As a result, when suppressing lateral sway of the main rope, the first sway suppression rope is pulled in a direction along the rotation direction of the first pulley. This makes it possible to appropriately suppress lateral sway of the main rope. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an overall configuration diagram of an elevator to which a main rope sway suppression device according to an embodiment of the present invention is applied. [Figure 2] FIG. 2 is a side view of the main rope vibration suppression device shown in FIG. [Figure 3] 3 is a plan view schematically showing an upper structure of the main rope vibration suppression device shown in FIG. 2. FIG. [Figure 4] FIG. 4(a) is a side view showing the overall configuration of the main rope sway suppressing device, and FIG. 4(b) is a plan view of the main rope sway suppressing device. [Figure 5] Figure 5(a) shows the operating state of the main rope sway suppression device when the main rope sway suppression device pulls the main rope to the right, and Figure 5(b) shows the operating state of the main rope sway suppression device when the main rope sway suppression device pulls the main rope to the left. DETAILED DESCRIPTION OF THE INVENTION

[0018] An elevator 10 to which a main rope sway suppression device according to one embodiment of the present invention is applied will be described below with reference to the drawings. In each drawing, "X" indicates the horizontal direction X that is approximately parallel to the longitudinal direction of the upper beam 14A-1, "Y" indicates the horizontal direction Y that is perpendicular to the horizontal direction X, and "Z" indicates the vertical direction Z that is perpendicular to the horizontal directions X and Y. Furthermore, the horizontal direction X will also be referred to as the X direction, and the horizontal direction Y will also be referred to as the Y direction, as necessary.

[0019] Fig. 1 is a diagram showing the schematic configuration of an elevator 10. In Fig. 1, for simplicity of illustration, a main rope group 12 is shown as a single rope. As shown in Fig. 1, the elevator 10 is a traction-type rope elevator, and a car frame 14A that supports a passenger car 14 is suspended from one end of the main rope group 12, which is made up of multiple main ropes 12-1, 12-2, 12-3, ... (see Fig. 2), and a counterweight 15 is suspended from the other end.

[0020] A main rope sway suppression device (hereinafter referred to as "sway suppression device") 30 is attached to the car frame 14A. The car 14 is configured to be able to rise and fall in the vertical direction Z along a pair of guide rails (not shown) provided on the wall surface of the elevator shaft 17 in correspondence with the car 14. Similarly, the counterweight 15 is also provided to be able to rise and fall in the vertical direction Z along a pair of guide rails (not shown) provided in correspondence with the counterweight 15.

[0021] Furthermore, one end of a compensating rope 16 is connected to the car frame 14A. The compensating rope 16 has a function of compensating for the imbalance in the weight of the main rope group 12, the hanging weight of which fluctuates depending on the elevation position of the car 14. The compensating rope 16 is stretched across a tension wheel 19 installed in a pit 17-1 at the bottom of the elevator shaft 17, and the other end is connected to the lower end of a counterweight 15.

[0022] The main rope group 12 is stretched over a sheave 18A and a deflector sheave 18B of a hoisting machine 18 installed in a machine room M directly above the elevator shaft 17, and has the function of relatively raising and lowering the car 14 and the counterweight 15 by rotating the sheave 18A forward or backward using a hoisting machine motor (not shown). The machine room M is also provided with a control unit 20 that comprehensively controls the operation of the hoisting machine 18 and the like and the operation of the vibration suppression device 30. In this embodiment, the operation of the vibration suppression device 30 is controlled by the control unit 20 installed in the machine room M, but the present invention is not limited to this. For example, a control unit that controls the operation of the vibration suppression device 30 may be installed on the top surface 14R of the car 14.

[0023] In the following description, the portion of the main rope group 12 from which the car 14 is suspended will be referred to as the car-side main rope group 12A, and the portion from which the counterweight 15 is suspended will be referred to as the counterweight-side main rope group 12B as necessary. According to the above definitions, the lengths of the car-side main rope group 12A and the counterweight-side main rope group 12B in the main rope group 12 vary depending on the elevation position of the car 14. Here, the car-side main rope group 12A shown by the dashed line in Fig. 1 is a schematic representation of an example of a state when the car-side main rope group 12A sways laterally (described in detail later).

[0024] Fig. 2 is a diagram showing the configuration of the vibration suppression device 30 as seen from the side. Fig. 3 is a diagram showing the configuration of the upper part of the vibration suppression device 30 as seen from above. In Fig. 3, to avoid complication, a long member 43 (described later) and the configuration surrounding the member 43 are not shown. As shown in Figs. 2 and 3, the vibration suppression device 30 has the function of suppressing lateral vibration of the car-side main rope group 12A when the car-side main rope group 12A vibrates in the horizontal direction (hereinafter, this horizontal vibration of the car-side main rope group 12A will be referred to as "lateral vibration"). The vibration suppression device 30 includes a body 32 and a connector 34 attached to the car-side main rope group 12A located above the car 14.

[0025] The main body 32 is attached to the upper beam 14A-1, which forms part of the car frame 14A, and is a structure constructed by combining steel materials and the like that form an approximately square frame when viewed from above and is arranged to surround the car side main rope group 12A.

[0026] 2 and 3, the sway suppression device 30 includes a connector 34 attached to the car-side main rope group 12A, pulley units 41 and 42 around which sway suppression ropes (first sway suppression rope, second sway suppression rope) 52 and 54 connected to the connector 34 are respectively hung, and a long member 43 arranged below the pulley units 41 and 42. One end of each of the sway suppression ropes 52 and 54 is connected to the connector 34 via joints 34A and 34B that are rotatable about an axis that is approximately parallel to the up-down direction Z.

[0027] By using joints 34A, 34B in this way, it is possible to reduce the force acting on the sway suppression ropes 52, 54 to bend the ropes 52, 54 when the car-side main rope group 12A is swaying laterally. Universal joints may also be used as joints 34A, 34B. Because the sway suppression ropes 52, 54 and their surrounding configuration are all the same, the following explanation will mainly focus on the sway suppression rope 52 and the surrounding configuration of the rope 52, and will omit explanation of the sway suppression rope 54 and the surrounding configuration of the rope 54 as appropriate.

[0028] The pulley units 41 and 42 are pulley units having almost the same configuration and arranged to face each other with the car-side main rope group 12A sandwiched therebetween. In the following explanation, parts that are common to both pulley units 41 and 42 will be explained using pulley unit 41, and explanations of pulley unit 42 will be omitted as appropriate.

[0029] Pulley unit 41 includes a pulley (first pulley) 44 that is disposed at the same height as connector 34, and a rotation mechanism 60 for supporting pulley 44 on body 32 so that it can rotate horizontally. Pulley 44 is provided on rotation mechanism 60 so that the rotation direction is the up-down direction (in other words, the axial direction of the rotation shaft is the horizontal direction).

[0030] Here, the portion of the sway suppression rope 52 located closer to the connector 34 than the pulley 44 will be referred to as the connector side sway suppression rope 52A, and the portion located closer to the actuator 48 than the pulley 44 will be referred to as the drive side sway suppression rope 52B as necessary.

[0031] 2 and 3, the rotation mechanism 60 includes a base 62 attached to the upper part of the main body 32, and a movable base 64 rotatably supported by the base 62 along the horizontal direction. The movable base 64 is rotatably supported by the base 62 via a cylindrical shaft 63. The movable base 64 is also provided with a support portion 44-1 that pivotally supports the pulley 44 described above. The base 62 and the movable base 64 are each formed of a plate that is generally rectangular in plan view.

[0032] The cylindrical shaft 63 has a hollow structure 63A at the center that is substantially annular in plan view as shown in Fig. 2, and is attached so as to penetrate the base 62 and the movable base 64 in the thickness direction. The cylindrical shaft 63 serves to rotatably support the movable base 64 on the base 62, as shown by the one-dot chain line and the two-dot chain line in Fig. 3. This allows the orientation of the pulley 44 to change following the displacement of the car-side main rope group 12A, even if the car-side main rope group 12A is displaced in the front-to-rear direction.

[0033] Furthermore, the drive-side runout suppression rope 52B is inserted into the cylindrical shaft 63 and is arranged to extend from a right end 43R of the elongated member 43 (described later) toward the pulley 44. Here, the attachment position of the cylindrical shaft 63 to the movable base 64 and the base 62 is preferably set so that the center portion of the hollow structure 63A substantially coincides with the position where the rope 52B extends from the pulley 44 toward the right end 43R of the elongated member 43 (described later).

[0034] As a result, as shown by the one-dot chain line and the two-dot chain line in Fig. 3, in a plan view, the position of the rotation center when the movable base 64 rotates can be located around the drive-side vibration suppression rope 52B (see Fig. 2) extending in the vertical direction. Therefore, when the movable base 64 on which the pulley 44 is mounted rotates, horizontal displacement of the drive-side vibration suppression rope 52B is reduced, and slack in the drive-side vibration suppression rope 52B due to the rotation of the pulley 44 can also be suppressed.

[0035] 4(a) is a side view schematically illustrating only the vibration suppression device 30 shown in FIG. 2, and FIG. 4(b) is a diagram illustrating the configuration of the elongated member 43 in a plan view. As shown in FIGS. 4(a) and 4(b), the elongated member 43 is rotatably supported (or pivotally supported) at its center on the main body 32 via a pivot support part 47, and is configured by two plate-like members 43-1 and 43-2 connected to each other so as to face each other with the car-side main rope group 12A sandwiched therebetween. As shown in FIG. 4(b), the pivot support part 47 is configured by a first pedestal 47A and a second pedestal 47B arranged opposite each other on the front and rear sides of the main body 32 with the elongated member 43 sandwiched therebetween, and is connected to the front-side plate-like member 43-1 and the rear-side plate-like member 43-2 via rotation axes AX1 and AX2, respectively.

[0036] 4(a) and 4(b), an elastic unit (first tension applying portion) 70 is provided at the right end portion (first end portion) 43R of the elongated member 43. This elastic unit 70 has a built-in elastic spring and serves to connect the drive-side sway suppression rope 52B to the right end portion 43R of the elongated member 43 via the spring. This applies tension, in other words, a preload, to the drive-side sway suppression rope 52B, thereby preventing slack from occurring across the entire length of the sway suppression rope 52.

[0037] As a result, it is possible to prevent the occurrence of slack in the sway suppression ropes 52, which would otherwise make it impossible to appropriately suppress lateral sway of the car-side main rope group 12A. It is also possible to prevent the occurrence of slack in the sway suppression ropes 52, which would otherwise cause the sway suppression ropes 52 to fall off the pulleys 44.

[0038] It is preferable that the shafts 70A and 70B provided at the upper part of the elastic unit 70 are rotatably engaged with through-holes H3 and H4 provided in the plate-like members 43-1 and 43-2, respectively. This allows the elastic unit 70 to rotate following the direction of the drive-side vibration-suppressing rope 52B, even if the angle between the drive-side vibration-suppressing rope 52B and the plate-like members 43-1 and 43-2 changes as the plate-like members 43-1 and 43-2 rotate. As a result, bending and rubbing of the drive-side vibration-suppressing rope 52B at the connection portion with the elastic unit 70 can be prevented as the plate-like members 43-1 and 43-2 rotate.

[0039] Similarly, an elastic unit (second tension applying portion) 72 may also be provided at the left end portion (second end portion) 43L of the elongated member 43. This elastic unit 72 has the same configuration as the elastic unit 70 described above, and has a role of connecting one end of the sway suppression rope 54 connected to the connector 34 and the other end of the sway suppression rope 54 hung over the pulley (second pulley) 46 included in the pulley unit 42 to the left end portion 43L of the elongated member 43.

[0040] This allows the elastic unit 72 to rotate in accordance with the direction of the sway suppression rope 54, even if the angle between the sway suppression rope 54 and the long member 43 changes as the long member 43 rotates. As a result, the sway suppression rope 54 can be prevented from bending and becoming easily worn at the connection portion with the elastic unit 72.

[0041] In this embodiment, the sway suppression ropes 52, 54 are connected to the long member 43 via elastic units 70, 72, but if slack in the sway suppression ropes 52, 54 is not a particular problem, the sway suppression ropes 52, 54 may be connected to the long member 43 without using the elastic units 70, 72.

[0042] The vibration suppression device 30 also includes an actuator 48 disposed directly below the right end 43R of the elongated member 43. The actuator 48 is attached to the right side surface of the body 32 and has a drive arm 49 that expands and contracts in the vertical direction, and by expanding and contracting the drive arm 49, the right end 43R of the elongated member 43 moves up and down.

[0043] The drive arm 49 is a rod-like member with an approximately T-shaped upper end 49A, which engages with elongated holes (engagement portions) H1, H2 (see FIG. 4(b)) provided opposite the plate-like members 43-1, 43-2 of the right end 43R. The elongated holes H1, H2 are through-holes that are elongated horizontally, in other words, in the longitudinal direction of the elongated member 43, so that the drive arm 49 can slide in the elongated holes H1, H2 to move smoothly up and down when the relative positions of the drive arm 49 and the elongated member 43 change as the elongated member 43 rotates.

[0044] The length L (see FIG. 4(b)) in the width direction of the elongated hole H1 is set to be longer than the distance that the drive arm 49 slides so as not to hinder the sliding movement of the drive arm 49 within the elongated hole H1 when the elongated member 43 rotates. Similarly to the elongated hole H1, the elongated hole H2 is also set to have a length in the width direction that is equal to the length L. It is preferable to use a hydraulic or electric actuator as the actuator 48.

[0045] In this embodiment, the elongated member 43 is provided with elongated holes H1 and H2, and the drive arm 49 is slidably engaged with the elongated member 43, but the present invention is not limited to this. For example, instead of providing the elongated member 43 with elongated holes H1 and H2, a guide rail may be provided, and the drive arm 49 may be slidably engaged via the guide rail.

[0046] Next, the operation of the sway suppression device 30 will be described with reference to Figures 5(a) and 5(b). As shown in Figure 5(a), when the sway suppression device 30 pulls the car-side main rope group 12A to the right, the actuator 48 displaces the right end 43R of the long member 43 downward via the drive arm 49. This causes the long member 43 to rotate to the right, and the car-side main rope group 12A can be pulled to the right via the sway suppression rope 52. In addition, a preload is applied to the sway suppression rope 54 on the opposite side via the elastic unit 72, so that the rope can follow the displacement of the car-side main rope group 12A without slackening.

[0047] On the other hand, as shown in Fig. 5(b), when the sway suppression device 30 pulls the car-side main rope group 12A to the left, the actuator 48 displaces the right end 43R of the long member 43 upward via the drive arm 49. This causes the long member 43 to rotate to the left, and the car-side main rope group 12A can be pulled leftward via the sway suppression rope 54. In addition, a preload is applied to the sway suppression rope 52 on the opposite side via the elastic unit 70, so that the rope can follow the displacement of the car-side main rope group 12A without slackening.

[0048] According to the main rope sway suppression device 30 of this embodiment, the sway suppression ropes 52, 54 are stretched across pulleys 44, 46 arranged around the car side main rope group 12A above the car 14 and connected to the car side main rope group 12A via a connector 34 via a long member 43 arranged below the pulleys 44, 46, and are pulled downward.

[0049] As a result, when suppressing lateral vibration of the car-side main rope group 12A, the direction in which the long member 43 pulls (pulls) the vibration-suppressing ropes 52, 54 is the direction along the rotation direction of the pulleys 44, 46. Therefore, it becomes possible to appropriately suppress lateral vibration of the car-side main rope group 12A.

[0050] In the above embodiment, the sway suppression device 30 is described as being configured to be able to pull the car side main rope group 12A to the right and left using the sway suppression ropes 52, 54, but it may also be configured to pull the car side main rope group 12A to the right or left using only one of the sway suppression ropes 52, 54.

[0051] In the above embodiment, an example is given in which the vibration suppression device 30 is used to suppress the lateral vibration of the cage side main rope group 12A, but the vibration suppression device 30 may also be installed on top of the counterweight 15 to suppress the lateral vibration of the counterweight side main rope group 12B.

[0052] The present invention can be implemented in various forms, including improvements, modifications, and variations based on the knowledge of those skilled in the art, without departing from the spirit of the invention. Furthermore, the invention can be implemented in a form in which any of the features of the invention are replaced with other technology, as long as the same action or effect is achieved. [Explanation of symbols]

[0053] 10 Elevator 12 Main rope group 12-1, 12-2, 12-3 Main rope 12A Cage side main rope group 12B Counterweight side main rope group 14 Car 14A Cage frame 14A-1 Upper beam 30 Vibration suppression device (main rope vibration suppression device) 32 skeleton 34 Connector 34A, 34B fittings 43 Long members 43R Right side end (1st end) 43L Left end (second end) 43-1, 43-2 Plate-shaped members H1,H2 long hole (engaging part) 41,42 Pulley unit 43 Long members 44 Pulley (1st pulley) 46 Pulley (2nd pulley) 48 Actuator (drive unit) 49 Drive arm 52 Vibration suppression rope (first vibration suppression rope) 54 Vibration suppression rope (second vibration suppression rope) 60 Rotating mechanism 62 Pedestal 63 Cylindrical shaft 64 Movable platform 70, 71 Elastic unit (first tension applying unit, second tension applying unit) X,Y horizontal direction Z vertical direction

Claims

1. A main rope sway suppression device that suppresses sway of a main rope that suspends an elevator car when sway occurs in the main rope, a first pulley arranged around the main rope above the car; an elongated member that is disposed below the first pulley and is rotatably supported; a drive unit that rotates the elongated member in the vertical direction; a second pulley arranged to face the first pulley with the main rope interposed therebetween; Equipped with The drive unit rotates the elongated member in the vertical direction, thereby pulling the main rope via a first sway suppression rope that is hung across the first pulley and has one end connected to the main rope and the other end connected to a first end of the elongated member, A second vibration suppression rope is connected to a second end of the long member, the second vibration suppression rope being hung over the second pulley and having one end connected to the main rope. Main rope vibration suppression device.

2. A main rope sway suppression device that suppresses sway of a main rope that suspends an elevator car when sway occurs in the main rope, a first pulley arranged around the main rope above the car; an elongated member that is disposed below the first pulley and is rotatably supported; a drive unit that rotates the elongated member in the vertical direction; Equipped with The drive unit rotates the elongated member in the vertical direction, thereby pulling the main rope via a first sway suppression rope that is hung across the first pulley and has one end connected to the main rope and the other end connected to a first end of the elongated member, a first tension applying portion that applies tension to the first vibration suppression rope is provided at the first end portion of the elongated member; Main rope vibration suppression device.

3. A main rope sway suppression device that suppresses sway of a main rope that suspends an elevator car when sway occurs in the main rope, a first pulley arranged around the main rope above the car; an elongated member that is disposed below the first pulley and is rotatably supported; a drive unit that rotates the elongated member in the vertical direction; a second pulley arranged to face the first pulley with the main rope interposed therebetween; Equipped with The drive unit rotates the elongated member in the vertical direction, thereby pulling the main rope via a first sway suppression rope that is hung across the first pulley and has one end connected to the main rope and the other end connected to a first end of the elongated member, A second vibration suppression rope is connected to a second end of the long member, the second vibration suppression rope having one end connected to the main rope in a state of being stretched across the second pulley, A second tension applying portion that applies tension to the second vibration suppression rope is provided at the second end of the elongated member. Main rope vibration suppression device.

4. A main rope sway suppression device that suppresses sway of a main rope that suspends an elevator car when sway occurs in the main rope, a first pulley arranged around the main rope above the car; an elongated member that is disposed below the first pulley and is rotatably supported; a drive unit that rotates the elongated member in the vertical direction; Equipped with The drive unit rotates the elongated member in the vertical direction, thereby pulling the main rope via a first sway suppression rope that is hung across the first pulley and has one end connected to the main rope and the other end connected to a first end of the elongated member, The drive unit has a drive arm that expands and contracts in the vertical direction, an engaging portion that engages with the drive arm so as to be slidable in the longitudinal direction of the elongated member is provided at the first end of the elongated member; Main rope vibration suppression device.

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