Main rope vibration suppression device

Abstract

To provide a main rope vibration suppressing device capable of smoothly suppressing lateral vibration of the main rope. [Solution] The main rope sway suppression device 30 is attached to the car side main rope group 12A above the car 14 and comprises a connector 34 to which one end of a sway suppression rope 52 that suppresses the sway of the car side main rope group 12A is connected, a pulley 44 provided at the same height as the connector 34, and a traction unit 70 that pulls the sway suppression rope 52 suspended across the pulley 44 in a downward direction while connected to the connector 34, and the traction unit 70 is provided with a slack suppression mechanism 80 that suppresses slack in the sway suppression rope 12 by applying a preload in a predetermined direction.

Description

[Technical Field]

[0001] The present invention relates to a main rope sway suppression device, and more particularly to a main rope sway suppression device that suppresses sway of the main rope caused by shaking of a building in which an elevator is installed 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 coupler attached to a main rope is hung over a pulley attached at the same height as the coupler, and one end of a sway suppression rope, one end of which is connected to the coupler, is pulled to pull the main rope horizontally.The document also discloses the provision of a tensioning mechanism that suppresses slack in the sway suppression rope by urging the sway suppression rope, located between the coupler and the pulley, downward via a tensioning pulley. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-187665 Summary of the Invention [Problem to be solved by the invention]

[0008] In the sway suppression device described in Patent Document 1, the sway suppression rope is biased via a tensioning pulley in a direction perpendicular to the pulling direction of the sway suppression rope, so if the sway suppression rope comes off the tensioning pulley, it becomes impossible to prevent the sway suppression rope from slackening. In such a case, slack occurs in the sway suppression rope, which causes the problem of being unable to smoothly suppress lateral sway of the main rope.

[0009] An object of the present invention is to provide a main rope sway suppression device that can smoothly suppress lateral sway of the main rope. [Means for solving the problem]

[0010] The main rope sway suppression device of the present invention is a main rope sway suppression device that suppresses the sway of the main rope that suspends an elevator car when sway occurs in the main rope, and includes a connector attached to the main rope above the car, a pulley installed at the same height as the connector, and a sway suppression rope that is connected to the connector and stretched across the pulley, and is pulled in a predetermined direction. Has a function a towing portion, for A slack suppression mechanism is provided that suppresses slack in the sway suppression rope by applying a preload in a predetermined direction. The towing part is connected to the rope for vibration suppression via a slack suppression mechanism. It is something.

[0011] In the main rope sway suppression device of the present invention, the slack suppression mechanism may be configured to pull the sway suppression rope in a predetermined direction using a spring.

[0012] In the main rope sway suppression device of the present invention, the slack suppression mechanism may be configured to pull the sway suppression rope in a predetermined direction using a weight. [Effects of the Invention]

[0013] According to the main rope sway suppression device of the present invention, a slack suppression mechanism is provided that applies a preload to the sway suppression rope in the same direction as the predetermined direction in which the traction section pulls the sway suppression rope, thereby suppressing slack throughout the sway suppression rope. As a result, slack is less likely to occur in the sway suppression rope, making it possible to smoothly suppress lateral sway of the main rope. [Brief explanation of the drawings]

[0014] [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(a) is a perspective view of the main rope sway suppression device included in Fig. 1. Fig. 2(b) is a plan view of the main rope sway suppression device shown in Fig. 2(a). [Figure 3] FIG. 3 is a side view showing the overall configuration of the main rope vibration suppression device. [Figure 4] FIG. 4(a) is a diagram showing a schematic configuration of the actuator when the drive-side vibration suppression rope is not being pulled, and FIG. 4(b) is a diagram showing a schematic configuration of the actuator when the drive-side vibration suppression rope is being pulled. [Figure 5] Fig. 5(a) is a diagram showing the configuration of a slack suppression mechanism according to a modified example, and Fig. 5(b) is a diagram showing a state in which the slack in the drive-side runout suppression rope is suppressed by the weight descending in the slack suppression mechanism shown in Fig. 5(a). [Figure 6] 10A and 10B are diagrams showing a state in which the arm of the slack suppression mechanism according to the modified example moves downward to pull the drive-side runout suppression rope. DETAILED DESCRIPTION OF THE INVENTION

[0015] 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.

[0016] FIG. 1 is a diagram showing the schematic configuration of an elevator 10. For simplicity, the main rope group 12 is shown as a single rope in FIG. 1. As shown in FIG. 1, the elevator 10 is a traction-type rope elevator. A car frame 14A supporting a 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. 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 move up and down 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 configured to be able to move up and down in the vertical direction Z along a pair of guide rails (not shown) provided in correspondence with the counterweight 15.

[0017] 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.

[0018] 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.

[0019] 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 schematically shows an example of a state when the car-side main rope group 12A sways laterally (described in detail later).

[0020] Fig. 2(a) is a perspective view of the vibration suppression device 30. Fig. 2(b) is a plan view of the vibration suppression device 30. In Fig. 2(b), to avoid cluttering the illustration, the car-side main rope group 12A below the upper beam 14A-1 and the coupler 34 is not shown, and cross-sectional hatching of the car-side main rope group 12A is also omitted. Fig. 3 is a diagram showing the side configuration of the vibration suppression device 30. In Fig. 3, the arrangement of the actuator 73 built into the traction unit 70 is shown by a dashed line.

[0021] 2(a) to 3, the vibration suppression device 30 has a 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 vibration of the car-side main rope group 12A in the horizontal direction will be referred to as "lateral vibration"). The vibration suppression device 30 includes a support body 32, a coupling 34 attached to the car-side main rope group 12A located above the car 14, and two vibration suppression units 40, 42 that suppress lateral vibration of the car-side main rope group 12A.

[0022] The support body 32 is attached to an upper beam 14A-1 that constitutes a part of the car frame 14A, and is a structure that has a generally rectangular frame shape in top view and is provided so as to surround the car-side main rope group 12A.

[0023] 2(a) to 3, the shake suppression units 40, 42 are arranged so as to be perpendicular to each other when viewed from above. Here, since the shake suppression units 40, 42 have almost the same configuration, the following explanation will mainly focus on the shake suppression unit 40, and explanation of the shake suppression unit 42 will be omitted as appropriate.

[0024] 2(a) to 3, the vibration suppression unit 40 has the function of suppressing lateral vibration of the car-side main rope group 12A via vibration suppression ropes 52, 54 connected to the coupler 34. The vibration suppression unit 40 includes pulleys 44, 46 that face each other with the coupler 34 in between and are installed at the same height as the coupler 34, a pulling section 70 that is configured to be able to pull the vibration suppression rope 52 that is stretched across the pulley 44, and an elastic unit 49 that is connected to one end of the vibration suppression rope 54 that is stretched across the pulley 46.

[0025] The traction unit 70 includes a housing 72 having an external shape like a vertically long box, and an actuator 73 stored in the housing 72. The actuator 73 is a direct-acting actuator made of an electric or hydraulic type, and has the function of pulling the sway suppression rope 52 downward (in a predetermined direction).

[0026] In the following description, 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 traction section 70 than the pulley 44 will be referred to as the drive side sway suppression rope 52B as appropriate, as necessary.

[0027] The vibration suppression unit 40 also includes rotation mechanisms 60 and 61 that rotatably support the pulleys 44 and 46. In the following description, since the rotation mechanisms 60 and 61 have the same configuration, the configuration of the rotation mechanism 60 will be mainly described, and the description of the rotation mechanism 61 will be omitted as appropriate.

[0028] 2(a) and 2(b), the rotation mechanism 60 includes a pedestal 62 attached to an upper frame 32-1 that constitutes a part of the support body 32, and a movable base 64 that is rotatably supported by the pedestal 62 along the horizontal direction. More specifically, the movable base 64 is rotatably supported by the pedestal 62 via a cylindrical shaft 63, which will be described in detail later. In addition, the movable base 64 is provided with a support portion 44-1 that pivotally supports the above-mentioned pulley 44. The pedestal 62 and the movable base 64 are each formed of a plate that is approximately rectangular in plan view.

[0029] With the above configuration, when the sway suppression rope 52 pulls the connector 34 (see FIG. 3), the pulley 44 can be rotated in accordance with the position of the connector 34. Therefore, the force with which the traction unit 70 pulls the drive-side sway suppression rope 52B can be smoothly applied to the connector 34 via the connector-side sway suppression rope 52A.

[0030] 2(a) and 2(b), the cylindrical shaft 63 has a hollow structure 63A at the center thereof that is generally annular in plan view, 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. 2(b). The drive-side vibration suppression rope 52B is inserted through the cylindrical shaft 63 and is arranged to extend from the traction section 70 toward the pulley 44.

[0031] Here, it is preferable to set the attachment position of the cylindrical shaft 63 relative to the movable base 64 and the base 62 so that the hollow structure 63A is located at a position where the drive side vibration suppression rope 52B extends from the pulley 44 toward the traction section 70 when the rope 52B is applying tension to the connector 34.

[0032] 2(b), the position of the rotation center of the movable base 64 when it rotates can be located around the drive-side sway suppression rope 52B (see FIG. 2(a)) 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 sway suppression rope 52B is reduced, and lateral vibration of the drive-side sway suppression rope 52B accompanying the rotation of the pulley 44 can be suppressed. As a result, the drive-side sway suppression rope 52B can be prevented from becoming loose or falling off the pulley 44 as the pulley 44 rotates.

[0033] 4(a) is a diagram schematically illustrating the configuration of the actuator 73 when the drive-side vibration suppression rope 52B is not pulled, and FIG. 4(b) is a diagram schematically illustrating the configuration of the actuator 73 when the drive-side vibration suppression rope 52B is pulled. As shown in FIGS. 4(a) and 4(b), the actuator 73 has a main body 74A, an arm 74B configured to expand and contract in the vertical direction relative to the main body 74A, and a slack suppression mechanism 80.

[0034] 4(a), the slack suppression mechanism 80 includes a lever 74C attached perpendicularly to the tip of the arm 74B, an annular base 74D, and an elastic spring 75, and serves to suppress slack in the runout suppression rope 52B by constantly pulling the runout suppression rope 52B downward. A threaded portion 52E is attached to one end of the drive-side runout suppression rope 52B by caulking or the like.

[0035] Nuts NT1 and NT2 are threaded onto this threaded portion 52E, inserted through a through-hole H1 provided in the lever 74C and into the annular base 74D directly below. Both nuts NT1 and NT2 are attached using a double nut method to prevent loosening of the threaded portion 52E, and by engaging with the annular base 74D, they serve to secure the drive-side vibration suppression rope 52B to the annular base 74D. An elastic spring 75 is attached in a compressed state between the annular base 74D and the lever 74C, and the elastic force of this elastic spring 75 keeps the vibration suppression rope 52B pulled downward.

[0036] With the above configuration, the slack suppression mechanism 80 constantly applies a traction force to the sway suppression rope 52B even when the arm 74B is not moving downward, in other words, when the actuator 73 is not pulling the sway suppression rope 52B. As a result, a preload can be applied by pulling the drive-side sway suppression rope 52B in the same direction as the pulling section 70 pulls the sway suppression rope 52B, so slack in the sway suppression rope 52B can be effectively suppressed regardless of the driving state of the actuator 73.

[0037] In addition, the elastic force of the elastic spring 75 acts on the connector side vibration suppression rope 52A (see Figure 3) via the drive side vibration suppression rope 52B, so slack in the connector side vibration suppression rope 52A can also be effectively suppressed.

[0038] In this embodiment, the car-side main rope group 12A is configured to be pulled using the sway suppression ropes 52, 54, but the car-side main rope group 12A may be pulled using only the sway suppression rope 52. Even in this case, the traction unit 70 pulls the sway suppression rope 52, thereby making it possible to suppress the sway of the car-side main rope group 12A.

[0039] 2(a), the pulley 44 may be provided with stoppers 44A, 44B, and 44C to prevent the sway suppression rope 52 from falling off. This more reliably prevents the sway suppression rope 52 from falling off the pulley 44. The pulley 46 has the same configuration as the pulley 44.

[0040] Further, each of the main ropes 12-1, 12-2, 12-3, ... constituting the car-side main rope group 12A is inserted into 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 movable in the vertical direction Z relative to the connector 34, or may be fixed to the connector 34 using a fixing bracket such as a bolt.

[0041] As shown in Fig. 2(b), it is preferable that one end of each of the sway suppression ropes 52, 54 be connected to the connector 34 via joints 34A, 34B that are rotatable about an axis that is approximately parallel to the up-down direction Z. By using the joints 34A, 34B in this manner, it is possible to reduce the force that acts on the sway suppression ropes 52, 54 and tends to bend the ropes 52, 54 when the car-side main rope group 12A sways laterally. Note that universal joints may also be used as the joints 34A, 34B.

[0042] The other end of the sway suppression rope 54 stretched across the pulley 46 is connected to an elastic unit 49 attached to the side of the support 32 directly below the pulley 46. A spring (not shown) is stored in this elastic unit 49, and tension is applied to the sway suppression rope 54 by pulling it downward with the elastic force of the spring.

[0043] Regardless of whether the car-side main rope group 12A is swaying laterally or not, tension acts over the entire area of ​​the sway suppression ropes 52, 54 via the above-described elastic unit 49 and elastic spring 75. As a result, slack in the sway suppression ropes 52, 54 is suppressed.

[0044] Furthermore, the connector 34 is also pulled in opposite directions in directions substantially parallel to the horizontal direction Y via the vibration suppression ropes 53 and 55. In this manner, the connector 34 is configured to be held at the origin position P in the center of the support body 32 while being pulled in directions substantially parallel to the horizontal direction X and the horizontal direction Y.

[0045] As described above, the sway suppression ropes 52, 54 are held in a state in which they are pulled in opposite directions using the traction unit 70 and the elastic unit 49, so that slack or bending of the sway suppression ropes 52, 54 is suppressed.

[0046] In this embodiment, the vibration suppression unit 40 includes an elastic unit 49, but a pulling unit having the same configuration as the pulling unit 70 may be provided instead of the elastic unit 49. In this case, the vibration suppression rope 54 is pulled by the pulling mechanism, thereby achieving the same effect as in this embodiment.

[0047] The traction unit 70 is attached to the side surface of the support body 32, and has the function of pulling the sway suppression rope 52 when the car-side main rope group 12A sways laterally. By attaching the traction unit 70 to the side surface of the support body 32 instead of the top surface 14R of the car 14 in this way, the driving noise of the traction unit 70 is less likely to be transmitted into the car 14.

[0048] Furthermore, the control unit 20 (see FIG. 1) detects the sway of the car-side main rope group 12A via a plurality of rope sway detection sensors (not shown) installed in the hoistway 17, and controls the operation of the sway suppression device 30 to suppress lateral sway of the car-side main rope group 12A based on the detection results. More specifically, the control unit 20 may control the sway suppression units 40, 42 to vibrate the car-side main rope group 12A, in other words, to sway it laterally, so that a reflected wave that cancels an incident wave, which is a lateral sway of the car-side main rope group 12A caused by building sway, is generated. This makes it possible to suppress lateral sway of the car-side main rope group 12A.

[0049] Regarding the operation control of the sway suppression device 30 in the control unit 20 (see FIG. 1), an operation pattern appropriate for suppressing lateral vibration of the car-side main rope group 12A may be calculated in advance using a simulation or the like. Also, an operation pattern appropriate for suppressing lateral vibration of the car-side main rope group 12A may be experimentally calculated by operating the sway suppression device 30 in a state in which the car-side main rope group 12A is actually swaying laterally.

[0050] In this embodiment, the control unit 20 determines the position where the swing width of the car-side main rope group 12A is maximum in the vertical direction Z based on position information of the car-side main rope group 12A acquired from a rope swing detection sensor (not shown).The control unit 20 then calculates the X- and Y-direction components of the swing width of the rope group 12A at the position where the swing width is maximum, and controls the drive of the swing suppression device 30 based on the magnitudes of the X- and Y-direction components.

[0051] More specifically, the control unit 20 controls the driving of the vibration suppression unit 40 based on the above-mentioned X-direction component, and controls the driving of the vibration suppression unit 42 based on the above-mentioned Y-direction component. In this way, the X-direction component and the Y-direction component of the lateral vibration of the car-side main rope group 12A are suppressed separately by the vibration suppression units 40, 42.

[0052] According to the main rope sway suppression device 30 of this embodiment, a slack suppression mechanism 80 is provided that constantly applies a preload to the sway suppression rope 52 in the same direction as the predetermined direction in which the traction unit 70 pulls the sway suppression rope 52, so slack in the sway suppression rope 52 can be suppressed over the entire length of the sway suppression rope 52. As a result, slack is less likely to occur in the sway suppression rope 52, and the sway suppression rope 52 can be appropriately pulled as the traction unit 70 pulls. As a result, lateral sway of the car-side main rope group 12A can be smoothly suppressed.

[0053] In this embodiment, an example is given in which the lateral vibration of the car-side main rope group 12A is suppressed by orthogonally arranging the vibration suppression units 40, 42, but the vibration suppression device 30 may be equipped with only one of the vibration suppression units 40, 42. In this case as well, it is possible to suppress the lateral vibration of the car-side main rope group 12A.

[0054] In the above embodiment, a configuration has been described in which the traction unit 70 is provided with a slack suppression mechanism 80 that suppresses slack in the sway suppression rope 52 by the elastic force of the elastic spring 75, but the present invention is not limited to this. For example, the traction unit 70 may be provided with a slack suppression mechanism 90 that suppresses slack in the sway suppression rope 52 by using a weight instead of the slack suppression mechanism 80. The configuration of the slack suppression mechanism 90 according to this modified example will be described using Figures 5(a) and 5(b). In the following description, parts that are common to the above embodiment will be denoted by the same reference numerals as appropriate and will not be described again, with only parts that differ in configuration being described.

[0055] FIG. 5(a) is a diagram showing the configuration of the slack suppression mechanism 90. FIG. 5(b) is a diagram showing a state in which the weight 94 of the slack suppression mechanism 90 shown in FIG. 5(a) descends to suppress slack in the drive-side runout suppression rope 52B. As shown in FIGS. 5(a) and 5(b), the slack suppression mechanism 90 includes plates 91 and 92 arranged above and below, and struts 93A and 93B connecting the plates 91 and 92. The plates 91 and 92 are supported on the side portions of the support body 32 (see FIG. 3). A lever 74E and weights 94A, 94B, 94C, etc. are inserted into each of the struts 93A and 93B in a stacked manner so as to be movable up and down. The lever 74E is formed to be longer than the lever 74C in the above embodiment, and has almost the same configuration as the lever 74C except that it is provided with through holes C1 and C2 for inserting the supports 93A and 93B, and a through hole C3 for inserting the drive side vibration suppression rope 52B.

[0056] Here, because the weights 94A, 94B, and 94C all have the same configuration, the following explanation will mainly focus on weight 94A, and explanations of the other weights 94B and 94C will be omitted where appropriate. Furthermore, when there is no need to distinguish weight 94A from the other weights 94B and 94C, it will be referred to as "weight 94" where appropriate. Weight 94A has through holes H2 and H4 for inserting supports 93A and 93B, and a through hole H3 for inserting drive-side vibration suppression rope 52B.

[0057] One end of the drive-side vibration suppression rope 52B is inserted through a through-hole 91A formed in the plate 91 and a through-hole C3 of the lever 74E, and is also inserted through a through-hole H3 formed in the center of the weight 94, and is engaged with or connected to the weight 94 located on the lowest side via a nut NT3. This allows a preload to be constantly applied to the drive-side vibration suppression rope 52B by the weight of the weight 94 itself.

[0058] Fig. 6 is a diagram showing a state in which arm 74B of slack suppression mechanism 90 moves downward to pull drive-side sway suppression rope 52B. As shown in Fig. 6, when arm 74B moves downward as actuator 73 is driven, lever 74E attached to the tip of arm 74B urges weight 94 downward. As a result, drive-side sway suppression rope 52B is pulled downward via weight 94, and lateral swing of car-side main rope group 12A is suppressed by the sway suppression rope 52B pulling car-side main rope group 12A.

[0059] In this case, when the slack suppression mechanism 90 according to the modified example is used, the same effects as those of the slack suppression mechanism 80 according to the above embodiment can be obtained.

[0060] 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]

[0061] 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 Support 34 Connector 34A, 34B fittings 40,42 Vibration suppression unit 44, 45, 46 Pulleys 49 Elastic Unit 52, 53, 54, 55 Vibration control rope 60,61 Rotation mechanism 62 Pedestal 63 Cylindrical shaft 64 Movable platform 70 Traction section 72 Case 73 Actuator 74A main body 74B Arm 74C, 74E lever 74D Circular base 75 Elastic Spring 80,90 Slack suppression mechanism 91,92 Plate 91A through hole 93A,93B Post 94, 94A, 94B, 94C Weights C1,C2,C3 through hole H1,H2,H3,H4 through hole 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 connector attached to the main rope above the car; A pulley provided at the same height as the connector; a pulling unit having a function of pulling the swing suppression rope stretched over the pulley in a predetermined direction while being connected to the connecting tool; Equipped with The traction unit is provided with a slack suppression mechanism that suppresses slack in the sway suppression rope by applying a preload in the predetermined direction, and the traction unit is connected to the sway suppression rope via the slack suppression mechanism. Main rope vibration suppression device.

2. The slack suppression mechanism is configured to pull the vibration suppression rope in the predetermined direction using a spring. The main rope vibration suppressing device according to claim 1.

3. The slack suppression mechanism is configured to pull the vibration suppression rope in the predetermined direction using a weight. The main rope vibration suppression mechanism according to claim 1.

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