Main rope sway suppression device

Abstract

To provide a main rope swing suppression device that can efficiently suppress the lateral swing of the main rope. [Solution] The main rope sway suppression device 30 includes a movable base (pedestal) 64 arranged around the connector 34 and a pulley 44 erected on the movable base 64. The movable base 64 includes a pulley unit (pulley rotation mechanism) 60 in which a cylindrical shaft (shaft portion) 64A, provided at a position different from the position where the pulley 44 is erected, is rotatably supported by being supported via a first bush 62A and a second bush 63A, and an actuator (traction portion) 48 (see Figure 3) that pulls the sway suppression rope 52, one end of which is connected to the connector 34 and stretched across the pulley 44.

Description

Technical Field

[0001] The present invention relates to a main rope sway suppression device, and particularly to a main rope sway suppression device that suppresses sway of a main rope caused by shaking of a building in which an elevator is installed due to an earthquake or the like.

Background Art

[0002] In recent years, with the progress of high-rise construction, sway of main ropes has become a problem in rope-type elevators when a building shakes due to earthquakes or strong winds. In many rope-type elevators installed in high-rise buildings, a machine room is provided directly above the upper part of a car hoistway, and a hoisting machine for driving the car is installed in the machine room. A main rope is wound around a sheave that constitutes a part of the hoisting machine, a car is connected to one end side of the main rope, a counterweight is connected to the other end side thereof, and both are suspended by the main rope. Then, by rotating the sheave forward or reversely by a prime mover, the car guided by a pair of car guide rails laid in the vertical direction is lifted and lowered.

[0003] In an elevator having such a configuration, for example, when a building shakes due to long-period ground motion, the main rope that suspends the car from the top of the building also sways horizontally in substantially the same direction as the shaking of the building (hereinafter, this horizontal sway of the main rope is referred to as "lateral sway").

[0004] Conventionally, the magnitude of the sway of the main rope is estimated from the magnitude of the shaking of the building sensed by a long-period vibration sensor installed in the building, and controlled operation of the elevator is performed according to the degree of the magnitude of the sway of the main rope, for example, the operation of the elevator is temporarily stopped.

[0005] However, there is a problem in that even after the building's vibrations subside, normal elevator operation cannot be resumed until the main rope's vibrations have stabilized. Furthermore, if the main rope resonates with the frequency of building vibrations caused by earthquakes or strong winds, the main rope's vibrations may become larger. In such cases, the main rope may come into contact with and damage equipment installed in the elevator shaft. If equipment is damaged, repair work by maintenance personnel will be required, which will result in a longer period before normal operation can be resumed.

[0006] In this regard, Patent Document 1 discloses a device for suppressing the lateral sway of a main rope, in which a connector attached to the main rope is stretched across a pulley arranged around the connector, and the other end of a sway-suppressing rope, one end of which is connected to the connector, is pulled by an actuator. It also discloses that by installing the pulley on a base that is rotatably supported via a cylindrical shaft, the orientation of the pulley can be changed to follow the change in the position of the connector due to the lateral sway of the main rope. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2021-187665 [Overview of the initiative] [Problems that the invention aims to solve]

[0008] In the vibration suppression device described in Patent Document 1, the base is rotated around a cylindrical shaft located at a different position from where the pulley is erected. As a result, the load of the pulley and other factors acting on the base tend to increase the bending moment acting on the cylindrical shaft (shaft portion). When a large bending moment acts on the cylindrical shaft, the base may become less able to rotate in accordance with the position change of the connector, which presents a problem in that the lateral vibration of the main rope cannot be efficiently suppressed.

[0009] The present invention aims to provide a main rope swing suppression device that can efficiently suppress the lateral swing of the main rope. [Means for solving the problem]

[0010] The present invention provides a main rope sway suppression device that suppresses the sway of a main rope when sway occurs in the main rope that suspends an elevator car by pulling the main rope via a connector attached to the main rope, and includes a base arranged around the connector and a pulley erected on the base, wherein the base is configured to be rotatable by a pulley rotation mechanism in which a shaft portion provided at a position different from the position where the pulley is erected is supported via a plurality of bearing portions, and a pulling portion which pulls a sway suppression rope that is connected at one end to the connector and stretched across the pulley, A rotation assist mechanism that rotates the base in conjunction with the displacement of the connector, It is equipped with the following features.

[0012] Furthermore, in the main rope swing suppression device of the present invention, the rotation assist mechanism may include a first connecting member rotatably connected to a connector, and a second connecting member extending from a base and having an insertion portion through which the first connecting member is inserted.

[0013] Furthermore, in the main rope sway suppression device of the present invention, the bearing portion may be composed of a sliding bearing. Furthermore, in the main rope sway suppression device of the present invention, the shaft portion may be configured in a cylindrical shape. [Effects of the Invention]

[0014] According to the main rope sway suppression device of the present invention, since the shaft of the base on which the pulley is erected is supported via multiple bearing parts, even if a large bending moment acts on the base, the load can be distributed and received via the multiple bearing parts. As a result, the base can be rotated smoothly. Consequently, it becomes possible to efficiently suppress the lateral sway of the main rope. [Brief explanation of the drawing]

[0015] [Figure 1]This is an overall configuration diagram of an elevator to which a main rope sway suppression device, which is one embodiment of the present invention, is applied. [Figure 2] Figure 2(a) is a perspective view of the main rope sway suppression device included in Figure 1. Figure 2(b) is a plan view of the main rope sway suppression device shown in Figure 2(a). [Figure 3] Figure 3 is a side view of the main rope sway suppression device shown in Figure 2(a). [Figure 4] Figure 4 is a side view showing the structure around the pulley and a partially enlarged view showing the structure around the cylindrical shaft included in the figure. [Figure 5] Figure 5(a) is a side view showing the configuration of the vibration suppression device according to the first modified example. Figure 5(b) is a top view showing the configuration of the vibration suppression device shown in Figure 5(a). [Figure 6] Figure 6(a) shows the operating state of the rotation assist mechanism when the connector moves backward in the vibration suppression device according to the first modified example, and Figure 6(b) shows the operating state of the rotation assist mechanism when the connector moves forward. [Figure 7] Figure 7(a) shows the operating state of the rotation assist mechanism when the connector moves to the right in the vibration suppression device according to the first modified example, and Figure 7(b) shows the operating state of the rotation assist mechanism when the connector moves to the left. [Figure 8] Figure 8 shows the configuration of the vibration suppression unit included in the vibration suppression device according to the second modified example. [Modes for carrying out the invention]

[0016] The following describes an elevator 10 to which a main rope sway suppression device, which is one embodiment of the present invention, is applied, with reference to the drawings. In each figure, "X" indicates the left-right direction X, which is a horizontal direction approximately parallel to the longitudinal direction of the upper beam 14A-1; "Y" indicates the front-back direction Y, which is a horizontal direction perpendicular to the left-right direction X; and "Z" indicates the up-down direction Z, which is perpendicular to the left-right direction X and the front-back direction Y, respectively.

[0017] FIG. 1 is a diagram showing a schematic configuration of an elevator 10. In FIG. 1, the main rope group 12 is illustrated as one rope for simplification of illustration. As shown in FIG. 1, the elevator 10 is a traction-type rope elevator, wherein a car frame 14A that supports a car 14 is suspended from one end side of a main rope group 12 composed of a plurality of main ropes 12-1, 12-2, 12-3, ... (see FIG. 2(a)), and a counterweight 15 is suspended from the other end side. A main rope sway suppressing device (hereinafter referred to as "sway suppressing device") 30 is attached to the car frame 14A. The car 14 is configured to be capable of ascending and descending in the vertical direction Z along a pair of guide rails (not shown) provided corresponding to the car 14 on a wall surface of a hoistway 17. Similarly, the counterweight 15 is also provided to be capable of ascending and descending in the vertical direction Z along a pair of guide rails (not shown) provided corresponding to the counterweight 15.

[0018] Further, one end of a compensation rope 16 having a function of compensating for the weight imbalance of the main rope group 12 whose suspended weight varies depending on the ascending / descending position of the car 14 is connected to the car frame 14A. The compensation rope 16 is stretched over a tension sheave 19 installed in a pit 17-1 which is the bottom portion of the hoistway 17, and the other end side thereof is connected to the lower end portion of the counterweight 15.

[0019] 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 hoistway 17, and has a function of relatively raising and lowering the car 14 and the counterweight 15 by rotating the sheave 18A forward or reversely by a hoisting machine motor (not shown). Further, the machine room M is provided with a control unit 20 that comprehensively controls the operation of the hoisting machine 18 and the like and the operation of the sway suppressing device 30. In the present embodiment, the operation of the sway suppressing device 30 is controlled by the control unit 20 provided 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 sway suppressing device 30 may be provided on an upper surface 14R of the car 14.

[0020] In the following explanation, the portion of the main rope group 12 that suspends the elevator car 14 will be referred to as the car-side main rope group 12A, and the portion that suspends the counterweight 15 will be referred to as the counterweight-side main rope group 12B, as needed. According to the above definition, the lengths of the car-side main rope group 12A and the counterweight-side main rope group 12B within the main rope group 12 will vary depending on the elevation position of the elevator car 14. Here, the car-side main rope group 12A shown by the dashed line in Figure 1 schematically represents an example of the state when the car-side main rope group 12A swings laterally (described in detail later).

[0021] Figure 2(a) is a perspective view of the sway suppression device 30. Figure 2(b) is a plan view of the sway suppression device 30. In Figure 2(b), the upper beam 14A-1 is omitted from the illustration to avoid clutter, and the cross-sectional hatching of the car-side main rope group 12A is also omitted. Figure 3 is a diagram showing the configuration of the sway suppression device 30 in a side view.

[0022] As shown in Figures 2(a) to 3, the swing suppression device 30 has the function of suppressing the lateral swing of the car-side main rope group 12A when the car-side main rope group 12A swings horizontally (hereinafter, this horizontal swing of the car-side main rope group 12A will be referred to as "lateral swing"). The swing suppression device 30 comprises a support 32, a connector 34 attached to the car-side main rope group 12A located above the elevator car 14, and two swing suppression units 40 and 42 that suppress the lateral swing of the car-side main rope group 12A.

[0023] The support 32 is attached to the upper beam 14A-1, which forms part of the cage frame 14A, and is a structure that, when viewed from above, has a roughly rectangular frame shape and is provided to surround the cage-side main rope group 12A.

[0024] As shown in Figures 2(a) to 3, the vibration suppression units 40 and 42 are arranged so as to be orthogonal to each other in a top view. Since the vibration suppression units 40 and 42 have almost identical configurations, the following description will mainly focus on vibration suppression unit 40, and the description of vibration suppression unit 42 will be omitted as appropriate.

[0025] As shown in Figures 2(a) to 3, the sway suppression unit 40 has the function of suppressing the lateral sway of the car-side main rope group 12A via sway suppression ropes 52 and 54 connected to the connector 34. The sway suppression unit 40 also includes pulley units (pulley rotation mechanisms) 60 and 61, which are arranged opposite each other with the connector 34 in between, and through which the sway suppression ropes 52 and 54 are respectively stretched. Since the configuration of pulley units 60 and 61 is the same, the following description will mainly describe the configuration of pulley unit 60, and the description of pulley unit 61 will be omitted as appropriate. In the following description, the portion of the sway suppression rope 52 located on the connector 34 side of the pulley 44 will be referred to as the connector-side sway suppression rope 52A, and the portion located on the actuator 48 side of the pulley 44 will be referred to as the drive-side sway suppression rope 52B as appropriate.

[0026] Figure 4 is a diagram showing the configuration of the pulley unit 60 and a partially enlarged view showing the cross-sectional configuration around the cylindrical shaft 64A included in the unit 60. In the partially enlarged view shown in Figure 4, the cross-sections of the base plate 62 and auxiliary plate 63 are shown with cross-sectional hatching, while the cross-sectional hatching of the first bush 62A and second bush 63A is omitted.

[0027] As shown in Figure 4, the pulley unit 60 includes a base plate 62 attached to the upper frame 32-1 which constitutes part of the support 32, an auxiliary plate 63 positioned directly below the base plate 62, and a movable base (pedestal) 64 that is rotatably supported by the base plate 62 and the auxiliary plate 63. The movable base 64 is rotatably supported by the base plate 62 and the auxiliary plate 63, and a support portion 44-1 that pivotally supports the pulley 44 described above is installed (erected) on its upper surface. The base plate 62 and the movable base 64 are made of metal plates that are roughly rectangular in plan view. The auxiliary plate 63 is made of metal plates that are roughly L-shaped in side view and is fixed to the side portion of the upper frame 32-1 like a cantilever beam.

[0028] As shown in Figure 4, a cylindrical shaft (shaft portion) 64A is attached to the movable base 64 of the pulley unit 60, penetrating the movable base 64 in the thickness direction, and the drive-side sway suppression rope 52B is configured to pass through the cylindrical shaft 64A and hang downward. The cylindrical shaft 64A has a hollow structure that is roughly annular in plan view at the center of the shaft and is attached so as to penetrate the base plate 62 and the auxiliary plate 63 in the thickness direction.

[0029] As shown by the dashed and double-dotted lines in Figure 2(b), the cylindrical shaft 64A serves to rotatably support the movable base 64 on the base plate 62 and the auxiliary plate 63. The base plate 62 and the auxiliary plate 63 are provided with through holes 62H and 63H, respectively, and a first bush (bearing portion) 62A and a second bush (bearing portion) 63A, which have a substantially cylindrical appearance, are attached to the through holes 62H and 63H, respectively. The cylindrical shaft 64A is rotatably fitted into the first bush 62A and the second bush 63A.

[0030] Furthermore, the vibration suppression device 30 has actuators (traction parts) 48 and elastic units 49 that pull vibration suppression ropes 52 and 54, respectively, provided on both sides of the support body 32.

[0031] With the above configuration, when the vibration suppression rope 52 pulls the connector 34 (see Figure 3), the pulley 44 can be rotated according to the position of the connector 34. Therefore, the force with which the actuator 48 pulls the drive-side vibration suppression rope 52B can be efficiently applied to the connector 34 via the connector-side vibration suppression rope 52A.

[0032] Here, the mounting position of the cylindrical shaft 64A on the movable base 64 with respect to the base plate 62 and auxiliary plate 63 described above is preferably such that the center of the cylindrical shaft 64A is located at a position where the drive-side vibration suppression rope 52B extends downward from the pulley 44 toward the actuator 48 when the movable base 64 rotates in order to suppress the vibration of the drive-side vibration suppression rope 52B.

[0033] Therefore, the cylindrical shaft 64A is provided at a position on the movable base 64 that is further out than the position where the pulley 44 is supported by the movable base 64 in the horizontal direction, and also outside of the tension-applying mechanism 70 described later. In other words, the cylindrical shaft 64A is provided at a position on the movable base 64 that is further away from the connector 34 than the tension-applying mechanism 70 and the support portion 44-1 of the pulley 44. Consequently, since the cylindrical shaft 64A is provided at a position far from the center of gravity of the movable base 64, a large bending moment acts on the cylindrical shaft 64A via the movable base 64.

[0034] Therefore, in this embodiment, the load acting on the cylindrical shaft 64A is distributed by rotatably supporting the cylindrical shaft 64A via two bushings 62A and 63A, as described above. This allows the movable base 64 to rotate smoothly around the cylindrical shaft 64A. Furthermore, it is preferable to use sliding bearings as bushings 62A and 63A. More preferably, it is preferable to use oil-less bushings, which are sliding bearings that can be used without lubrication, as bushings 62A and 63A.

[0035] Furthermore, with the above configuration, as shown by the dashed and double-dotted lines in Figure 2(b), in a plan view, the position of the pivot point when the movable base 64 rotates can be set to the periphery of the drive-side sway suppression rope 52B (see Figure 3) that extends in the vertical direction. Therefore, when the movable base 64 equipped with the pulley 44 rotates, the horizontal displacement of the drive-side sway suppression rope 52B is reduced, and the lateral sway of the drive-side sway suppression rope 52B accompanying the rotation of the pulley 44 can be suppressed. As a result, it is possible to prevent the drive-side sway suppression rope 52B from slackening or falling off the pulley 44 as the pulley 44 rotates.

[0036] Furthermore, as shown in Figure 4, the pulley unit 60 has a tension-applying mechanism 70 that applies tension to the swing-suppressing rope 52. The tension-applying mechanism 70 is installed on the movable base 64 in a position closer to the connector 34 than to the pulley 44, and includes a tension-applying pulley 72 and a support arm 73 to which the pulley 72 is attached. This support arm 73 includes a support portion 73-1 fixed to the movable base 64 and a movable arm 73-2 that is supported so as to be movable in the vertical direction Z via a guide rail (not shown) attached to the support portion 73-1. The tension-applying pulley 72 is pivotally supported at the upper end of the movable arm 73-2. An elastic spring 74 is also attached between the movable arm 73-2 and the support portion 73-1. The elastic spring 74 has the function of applying an elastic force to the tension-applying pulley 72 via the movable arm 73-2.

[0037] Furthermore, the tension-applying pulley 72 has the function of biasing the coupling side sway suppression rope 52A downward by its own weight and the elastic force of the elastic spring 74. This makes it possible to suppress slack in the coupling side sway suppression rope 52A.

[0038] In this embodiment, the car-side main rope group 12A is pulled using the swing suppression ropes 52 and 54, but it is also possible to pull the car-side main rope group 12A using only the swing suppression rope 52. In this case as well, the swing of the car-side main rope group 12A can be suppressed by the actuator 48 pulling the swing suppression rope 52.

[0039] Furthermore, as shown in Figure 2(a), the pulley 44 may be equipped with retaining clips 44A, 44B, and 44C (see Figure 2(a)) to prevent the swing-suppressing rope 52 from falling off. This makes it possible to more reliably prevent the swing-suppressing rope 52 from falling off the pulley 44. The pulley 46 has the same configuration as the pulley 44.

[0040] Furthermore, each of the main ropes 12-1, 12-2, 12-3, ... that constitute the cage-side main rope group 12A is inserted through a through hole provided in the connector 34, corresponding to each of the main ropes 12-1, 12-2, 12-3, ... Here, each of the main ropes 12-1, 12-2, 12-3, ... may be made movable in the vertical direction Z relative to the connector 34, or they may be fixed to the connector 34 using fixing fittings such as bolts.

[0041] As shown in Figure 2(b), it is preferable that the swing-suppressing ropes 52 and 54 are connected to the connector 34 at one end via joints 34A and 34B, which are rotatable around an axis substantially parallel to the vertical Z direction. By using joints 34A and 34B in this way, the bending force acting on the swing-suppressing ropes 52 and 54 when the car-side main rope group 12A is swinging laterally can be mitigated. Universal joints may also be used as joints 34A and 34B.

[0042] Furthermore, the other end of the sway-suppressing rope 52 stretched across the pulley 44 is connected to an actuator 48 attached to the side of the support 32 directly below the pulley 44. It is preferable to use a hydraulic or electric actuator for the actuator 48. On the other hand, the other end of the sway-suppressing rope 54 stretched across the pulley 46 is connected to an elastic unit 49 attached to the side of the support 32 located directly below the pulley 46. This elastic unit 49 houses an elastic spring (not shown), and tension is applied to the sway-suppressing rope 54 by the elastic force of the spring.

[0043] With the above configuration, when the main rope group 12A on the car side is not swaying laterally, the connector 34 is pulled in opposite directions via the sway-suppressing ropes 52 and 54, and also pulled in opposite directions via the sway-suppressing ropes 53 and 55. In this way, the connector 34 is held at the origin position P located in the center of the support 32 in a plan view, while being pulled in four directions: front, back, left, and right.

[0044] Furthermore, as described above, since the actuator 48 and elastic unit 49 are configured to pull the vibration suppression ropes 52 and 54 in opposite directions, when the tension acting on the vibration suppression rope 52 changes due to the driving of the actuator 48, the tension that the elastic unit 49 applies to the vibration suppression rope 54 on the opposite side also changes accordingly. As a result, when the actuator 48 is driven, there is an advantage that slack or bending is less likely to occur in the vibration suppression ropes 52 and 54.

[0045] In this embodiment, the vibration suppression unit 40 is equipped with an elastic unit 49, but instead of the elastic unit 49, an actuator having the same configuration as the actuator 48 may be provided. In this case, the same effect as in this embodiment can be obtained by the actuator 48 pulling the vibration suppression rope 54.

[0046] Furthermore, the control unit 20 detects the swing of the car-side main rope group 12A via multiple rope swing detection sensors (not shown) installed in the hoistway 17, and controls the operation of the swing suppression device 30 to suppress the lateral swing of the car-side main rope group 12A based on the detection results. More specifically, the control unit 20 may control the swing suppression units 40 and 42 to excite the car-side main rope group 12A, in other words, to cause it to swing laterally, in response to the incident wave, which is the lateral swing of the car-side main rope group 12A caused by building sway, so that a reflected wave is generated that cancels out the incident wave. This makes it possible to suppress the lateral swing of the car-side main rope group 12A.

[0047] Regarding the operation control of the swing suppression device 30 in the control unit 20, an appropriate operation pattern for suppressing the lateral swing of the car-side main rope group 12A may be calculated in advance using simulations or the like and used. Alternatively, an appropriate operation pattern for suppressing the lateral swing of the car-side main rope group 12A may be calculated experimentally by operating the swing suppression device 30 while the car-side main rope group 12A is actually swinging laterally.

[0048] In this embodiment, the control unit 20 determines the position where the swing amplitude of the car-side main rope group 12A is maximum in the vertical Z direction, based on the position information of the car-side main rope group 12A obtained from a rope swing detection sensor (not shown). The control unit 20 then calculates the X and Y components of the swing amplitude of the main rope group 12A at the position where the swing amplitude is maximum, and controls the drive of the swing suppression device 30 based on the magnitude of these X and Y components.

[0049] More specifically, the control unit 20 controls the drive of the sway suppression unit 40 based on the X-direction component described above, and controls the drive of the sway suppression unit 42 based on the Y-direction component described above. In this way, the X-direction and Y-direction components of the lateral sway of the main rope group 12A on the car side are suppressed separately by the sway suppression units 40 and 42, respectively.

[0050] According to the main rope sway suppression device 30 of this embodiment, since the cylindrical shaft 64A of the movable base 64 is pivotally supported by multiple bearing parts (first bush 62A, second bush 63A), even if a large bending moment acts on the movable base 64, the load can be distributed and received through the first bush 62A and second bush 63A, allowing the movable base 64 to rotate smoothly. As a result, lateral sway of the main rope group 12 can be efficiently suppressed.

[0051] In the above embodiment, an example is given in which the cylindrical shaft 64A of the movable base 64 is supported by two bearing parts (first bush 62A, second bush 63A), but the present invention is not limited thereto. For example, instead of using the first bush 62A and the second bush 63A, if there is no problem in supporting the cylindrical shaft 64A, a bush formed to be longer in the axial direction than the first bush 62A may be used to support the cylindrical shaft 64A with only a single bush. In this case, the cylindrical shaft 64A can be supported with only one bush. Furthermore, the cylindrical shaft 64A may be supported via three or more bearing parts instead of two bearing parts (first bush 62A, second bush 63A).

[0052] In the above embodiment, the sway suppression device 30 is described as rotating the movable base 64 via the first bush 62A and the second bush 63A to follow the position change of the main rope group 12A on the car side, but the present invention is not limited thereto. For example, the sway suppression unit 40 may be equipped with a rotation assist mechanism 80 that rotates the movable base 64 of the pulley unit 60 in conjunction with the position change of the connector 34.

[0053] The vibration suppression device 90 according to the first modified example in this case will be explained using Figures 5(a) and 5(b). In the following explanation of the first and second modified examples, parts that are identical in configuration to the vibration suppression device 30 in the above embodiment will be indicated by the same reference numerals as appropriate and their explanations will be omitted, with only the parts that differ in configuration being explained.

[0054] Figure 5(a) is a side view showing the configuration of the sway suppression device 90, and Figure 5(b) is a plan view of the sway suppression device 90. In Figure 5(a), some components such as the main rope group 12A on the car side and the joints of the sway suppression unit 42 are omitted from the illustration, and in Figure 5(b), the joint 34A and the sway suppression rope 52A on the connector side are omitted from the illustration.

[0055] As shown in Figures 5(a) and 5(b), the vibration suppression device 90 has the same configuration as the vibration suppression device 30 of the above embodiment, except that it includes a rotation assist mechanism 80 that assists in the rotation of the movable base 64. The rotation assist mechanism 80 has the function of rotating the movable base 64 in conjunction with the movement of the connector 34 in the horizontal direction. The rotation assist mechanism 80 includes an extension plate 81 that extends from the connector 34 toward the movable base 64 and a guide arm 82 that extends from the movable base 64 side. The tip portion 81A of the extension plate 81 is configured in an annular shape, and the first round bar 83 is fixed in a state where it is inserted into the tip portion 81A. On the other hand, a cylindrical portion (insertion portion) 82A is provided at the tip of the guide arm (second connecting member) 82, and the second round bar (first connecting member) 84 is inserted through this cylindrical portion 82A in a state where it can slide in the horizontal direction. An annular portion 84A is provided at one end of the second round bar 84, and the lower end of the first round bar 83 is inserted through the annular portion 84A. In this way, the second round bar 84 is connected to the first round bar 83 in a rotatable manner. In this embodiment, as described above, the upper end of the first round bar 83 is fixed to the tip portion 81A of the extension plate 81 and the lower end is rotatably inserted into the annular portion 84A of the second round bar 84. However, the first round bar 83 may also be fixed with its upper end rotatably inserted into the tip portion 81A of the extension plate 81 and its lower end inserted into the annular portion 84A of the second round bar 84.

[0056] With the above configuration, the movable base 64 rotates to face the connector 34 as the connector 34 moves in the front-rear direction Y, and as the distance between the connector 34 and the movable base 64 changes as the connector 34 moves in the left-right direction X, the second round bar 84 slides while inserted into the cylindrical portion 82A of the guide arm 82.

[0057] Figures 6(a) and 6(b) schematically show the operation of the rotation assist mechanism 80 when the coupling device 34 is displaced in the longitudinal direction Y from its origin position P due to the lateral swing of the cage-side main rope group 12A in the longitudinal direction Y. In Figures 6(a) and 6(b), the origin position P of the coupling device 34 is indicated by a dashed line.

[0058] As shown in Figure 6(a), when the connector 34 is displaced backward, the second round bar 84 rotates forward relative to the first round bar 83, causing the movable base 64 to rotate backward. As shown in Figure 6(b), when the connector 34 is displaced forward, the second round bar 84 rotates backward relative to the first round bar 83, causing the movable base 64 to rotate forward. Furthermore, as shown in Figures 6(a) and 6(b), when the connector 34 is displaced forward or backward from the origin position P, the second round bar 84 slides within the cylindrical portion 82A of the guide arm 82, absorbing the change in distance between the connector 34 and the movable base 64. In this way, the orientation of the movable base 64 can be changed more smoothly in conjunction with the movement of the connector 34 in the front-rear direction Y.

[0059] Furthermore, Figures 7(a) and 7(b) schematically show the operation of the rotation assist mechanism 80 when the position of the connector 34 is displaced from its origin position P in the left-right direction X due to the lateral swing of the main rope group 12 in the left-right direction X. In Figures 7(a) and 7(b), the origin position P of the connector 34 is indicated by a dashed line.

[0060] As shown in Figure 7(a), when the connector 34 is displaced to the right, the second round bar 84 slides to the right within the cylindrical portion 82A of the guide arm 82, which shortens the distance between the connector 34 and the movable base 64. On the other hand, as shown in Figure 7(b), when the connector 34 is displaced to the left, it slides to the left within the cylindrical portion 82A of the guide arm 82, which lengthens the distance between the connector 34 and the movable base 64. The length of the second round bar 84 is predetermined to prevent it from falling out of the cylindrical portion 82A of the guide arm 82 when the connector 34 is displaced to the left from the origin position P.

[0061] With the above configuration, the vibration suppression device 90 can rotate the movable base 64 more smoothly so that it faces the connector 34 in conjunction with the movement of the connector 34 in the front-rear direction Y and the left-right direction X.

[0062] Furthermore, in the first modified example described above, the vibration suppression device 90 is described as being equipped with a rotation assist mechanism 80 that assists the rotation of the pulley unit 60, but the present invention is not limited thereto. For example, it may further be equipped with a rotation assist mechanism 86 that assists the rotation of the pulley unit 61. The vibration suppression device 100 according to the second modified example in this case will be described with reference to Figure 8.

[0063] Figure 8 shows the configuration of the vibration suppression device 100 according to the second modified example. In Figure 8, some components, such as the cage-side main rope group 12A and the joints of the vibration suppression unit 42, are omitted as appropriate. As shown in Figure 8, the vibration suppression device 100 has the same configuration as the vibration suppression device 90, except that it is equipped with a rotation assist mechanism 86 that assists the rotation of the pulley unit 61. This rotation assist mechanism 86 has the same configuration as the rotation assist mechanism 80 and has the function of assisting the rotation of the movable base of the pulley unit 61 so that the movable base rotates in conjunction with the connector 34. In this case as well, the same effect as the vibration suppression device 30 according to the above embodiment can be obtained.

[0064] In the vibration suppression device 100 according to the second modified example described above, rotation assist mechanisms 80 and 86 are provided to assist the rotation of the pulley units 60 and 61, respectively, but it is also possible to provide only the rotation assist mechanism 86 that assists the rotation of the pulley unit 61.

[0065] Furthermore, the vibration suppression unit 42 may also be equipped with a rotation assist mechanism having the same configuration as the rotation assist mechanism 80 described above. In this case as well, the same effects as the vibration suppression device 30 according to the above embodiment can be obtained.

[0066] The present invention can be implemented in various forms with improvements, modifications, or alterations based on the knowledge of those skilled in the art, without departing from its spirit. Furthermore, the invention may be implemented in a form in which any of its defining features is replaced with other technologies, as long as the same function or effect is achieved. [Explanation of symbols]

[0067] 10 Elevators 12 Main rope groups 12-1, 12-2, 12-3 Main ropes 12A Main rope group on the cage side 12B Main rope group on the counterweight side 14. 14A cage frame 14A-1 Upper beam 30, 90, 100 Swing suppression device (Swing suppression device for the main rope) 32 Support 34 Connectors 34A, 34B fittings 40,42 Vibration suppression unit 44, 45, 46 Pulleys 48, 58 Actuator (traction part) 49 Elastic Units 52, 53, 54, 55 Rope for suppressing sway 60, 61 Pulley unit (pulley rotation mechanism) 62 Base Plate 62A First bushing (bearing section) 62H through hole 63 Auxiliary plate 63A Second bushing (bearing section) 63H through hole 64. Movable base (pedestal) 64A Cylindrical shaft (shaft portion) 70,71 Tension-applying mechanism 72 Tension-applying pulley 73 Movable Arm 73-1 Support part 73-2 Movable Arm 74 Elastic spring 80,86 Rotation assist mechanism 81 Extension Plate 81A Tip 82 Guide arm (second connecting member) 82A Cylindrical section (insertion section) 83. First round bar 84. Second round bar (first connecting member) P origin position X Left / right direction Y (forward / backward direction) Z vertical direction

Claims

1. A swing suppression device for an elevator car, which suppresses the swing of the main rope by pulling the main rope via a connector attached to the main rope when the main rope swings, The pulley rotation mechanism includes a base arranged around the connector and a pulley erected on the base, wherein the base is rotatable by a shaft portion provided at a position different from the position on which the pulley is erected, which is supported via a plurality of bearing portions. A towing unit that pulls a swing-suppressing rope, one end of which is connected to the aforementioned connector and stretched across the aforementioned pulley, A rotation assist mechanism that rotates the base in conjunction with the displacement of the connector, A device for suppressing the swing of the main rope, equipped with the following features.

2. The rotation assist mechanism includes a first connecting member rotatably connected to the connector, and a second connecting member extending from the base and having an insertion portion through which the first connecting member is inserted. The main rope sway suppression device according to claim 1.

3. The bearing section is composed of a sliding bearing. The main rope sway suppression device according to claim 1.

4. The shaft portion is configured in a cylindrical shape. The main rope sway suppression device according to claim 1.

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