JP4664003B2 - Rope vibration suppression device - Google Patents

Description

  The present invention relates to a rope vibration suppressing device, and more particularly, to a rope vibration suppressing device for suppressing vibration generated by a rope used in an elevator.

  As a conventional elevator device with a machine room, there is an elevator car (hereinafter referred to as a car) and a counterweight at both ends of a rope hung between a sheave of a hoisting machine installed in the machine room and a sorase car. The mainstream is one that is hung separately and the car and the counterweight are moved up and down in the hoistway by a hoist (see, for example, Patent Document 1).

  A rope used for an elevator is usually configured by twisting a plurality of strands. When the elevator moves up and down and the rope passes through each car (sheave, sorase wheel, return wheel, etc.), vibrations at each twisting pitch (hereinafter referred to as rope biting vibration) occur due to the twisting unevenness of the rope. There is. In addition, the generation of rope string vibration of a rope string configured with each vehicle as a fulcrum is also conceivable. If the frequency of the rope biting vibration and the frequency of the rope string vibration match and resonate, the ride comfort in the car may be adversely affected.

JP 2003-104656 A

  In the conventional elevator apparatus, as described above, rope biting vibration due to rope twisting irregularities and rope string vibration of the rope string with each car as a fulcrum occurs. The frequency of the rope biting vibration and the rope string vibration There is a problem that there is a possibility of adversely affecting the riding comfort in the car when the frequencies of the two cars match and resonate.

  The present invention has been made to solve such a problem, and an object of the present invention is to obtain a rope vibration suppression device that prevents the resonance of the frequency of the rope string vibration and the resonance of the rope biting vibration. Yes.

The present invention relates to a rope vibration suppression device for an elevator apparatus including an elevator cage and a counterweight that are lifted and lowered by a hoisting rope wound around two or more rotating vehicles, and is provided between the rotating vehicles. The rope length of the hoisting rope between the rotating wheels is changed by being pressed against the hoisting rope so that the frequency of the rope biting vibration and the frequency of the rope chord vibration of the rope chord match and do not resonate. Rope string vibration frequency adjusting means for adjusting the frequency of the rope string vibration of the rope string configured with the rotating wheel as a fulcrum, and a drive for switching between pressing / separating the rope string vibration frequency adjusting means with respect to the hoisting rope Means, a rope tension detecting means for detecting the rope tension of the hoisting rope, and the rope tension detecting means. Value, and a determination means for determining whether within a predetermined range value of the frequency of the rope string vibration is close to the value of the frequency of the vibration biting rope generated every twisting pitch of the hoisting ropes When the determination means determines that the detected value of the rope tension is within the predetermined range, the drive means presses the rope string vibration frequency adjusting means against the hoisting rope. It is a vibration suppression device.

The present invention relates to a rope vibration suppression device for an elevator apparatus including an elevator cage and a counterweight that are lifted and lowered by a hoisting rope wound around two or more rotating vehicles, and is provided between the rotating vehicles. The rope length of the hoisting rope between the rotating wheels is changed by being pressed against the hoisting rope so that the frequency of the rope biting vibration and the frequency of the rope chord vibration of the rope chord match and do not resonate. A rope string vibration frequency adjusting means for adjusting the frequency of the rope string vibration of the rope string configured with the rotating wheel as a fulcrum, and a drive for switching between pressing / separating the rope string vibration frequency adjusting means with respect to the hoisting rope Means, a rope tension detecting means for detecting the rope tension of the hoisting rope, and the rope tension detecting means. Value, and a determination means for determining whether within a predetermined range value of the frequency of the rope string vibration is close to the value of the frequency of the vibration biting rope generated every twisting pitch of the hoisting ropes When the determination means determines that the detected value of the rope tension is within the predetermined range, the drive means presses the rope string vibration frequency adjusting means against the hoisting rope. Because it is a vibration suppression device, the rope string vibration frequency adjusting means adjusts the frequency of the rope string vibration to prevent it from resonating with the frequency of the rope biting vibration. Can be held.

Embodiment 1 FIG.
FIG. 1 shows an overall configuration of a machine room-less elevator device including a rope vibration suppression device according to Embodiment 1 of the present invention. As shown in FIG. 1, in the present embodiment, a car 1 is hung on one end side of a rope 2 via a pair of suspension cars 3 that are rotating cars provided under the car 1 (2: 1 roping). ) To save space in the hoistway. A counterweight 10 is suspended from the other end of the rope 2 via a sheave 14. As shown in FIG. 1, a plurality of sheaves 11 to 13 are installed between the car 1 and the counterweight 10, and the rope 2 is hung around each sheave 11 to 13. The sheave 11 is arranged on the floor side of the hoistway, and the sheaves 12 and 13 are arranged on the upper part of the hoistway so as to be separated from each other with the position of the sheave 11 as the center.

  FIG. 2 is an enlarged view of the suspension wheel 3 portion of FIG. As described above, the car 1 is suspended by the rope 2 via the pair of suspension wheels 3. A rotating body 4 is provided between the two suspension wheels 3. The diameter of the rotating body 4 is configured to be smaller than the diameter of the suspension wheel 3. The suspension wheel 3 is driven to rotate about a shaft 18 provided on a fixing member 15 fixed to the bottom surface of the car 1 via a support member 17. The shaft 18 is provided so as to be parallel to the bottom surface of the cage 1. A support member 16 is provided at a central portion of the fixing member 15 in a direction perpendicular to the longitudinal direction of the fixing member 15. At least one end of the support member 16 protrudes downward from the long side portion of the fixing member 15 as shown in FIG. The support member 16 is provided so that the extension amount of the protruding portion can be adjusted. A shaft 19 is fixed to the protruding portion of the support member 16. The shaft 19 is provided in parallel with the shaft 18. The rotating body 4 is driven to rotate about this shaft 19.

  The principle of this embodiment will be described. On the rope 2, the weight of the car 1, the suspension wheel 3, etc. acts as the rope tension T. In this case, it is conceivable that the rope string vibration of the rope string of the rope 2 with both suspension wheels 3 as a fulcrum is generated. When the frequency of the rope string vibration coincides with the frequency of the rope biting vibration, it resonates and adversely affects the riding comfort in the car 1. Therefore, in this embodiment, in order to avoid the resonance, the rotating body 4 Is provided between the suspension vehicles 3. That is, since the frequency of the rope string vibration is determined by the rope tension T and the distance L between the shafts 18 of the suspension vehicle 3, the distance L between the suspension vehicles 3, that is, between the fulcrums of the rope 2 constituting the string, A new rotating body 4 as shown in FIG. 2 is provided, the rotating body 4 is pressed against the rope 2, the rope length between the fulcrums is changed, and the frequency of the rope string vibration is changed. Is not matched with the frequency of the rope biting vibration to avoid resonance.

  As described above, in the present embodiment, a new rotating body 4 is provided between the fulcrums of the rope 2 constituting the string, and this is pressed against the rope 2 to change the frequency of the rope string vibration. When the vibration frequency is close to the rope biting vibration frequency, it can be adjusted so as to be separated from the rope biting vibration frequency, so that resonance with the rope biting vibration frequency can be avoided. Comfort can be kept comfortable.

Embodiment 2. FIG.
FIG. 3 shows the overall configuration of the elevator apparatus with machine room provided with the rope vibration suppressing device according to Embodiment 2 of the present invention. As shown in FIG. 3, also in the present embodiment, as in the first embodiment, the car 1 is hung on one end side of the rope 2 via a pair of suspension wheels 3 provided under the car 1 ( (2: 1 roping) to save space in the hoistway. A counterweight 10 is suspended from the other end of the rope 2 via a sheave 14. A machine room 21 is provided at the upper part of the hoistway between the car 1 and the counterweight 10 as shown in FIG. In the machine room 21, a sheave 5 of a hoisting machine 20 that is a rotating wheel and a wheel 6 are provided.

  FIG. 4 is an enlarged view of the machine room 21 portion of FIG. 3 and 4, the rope tension T due to the weight of the car 1, the suspension car 3, and the counterweight 10 is applied to the rope 2 via the sheave 5 and the wheel 6 of the hoist 20. Rope 2 is hung. In this case, occurrence of string vibration of the rope 2 with the positions of the sheave 5 and the wheel 6 of the hoisting machine 20 as fulcrums is conceivable. In this embodiment, the frequency of the rope string vibration is determined by the rope tension T and the distance L between the sheave 5 and the wheel 6. As in the first embodiment, when the frequency of the rope string vibration coincides with the frequency of the rope biting vibration, resonance occurs and adversely affects the riding comfort in the car. A new rotator 24 is provided between the sheave 5 of the upper machine 20 and the wheel 6 and the rope 2 is wound around. By pressing the rotator 24 against the rope 2, the rope length between the fulcrums is changed, and the rope string By changing the frequency of vibration, it was separated from the frequency of the rope biting vibration. Thereby, resonance can be avoided. The rotating body 24 is provided at the tip of a support member that extends upward from the floor side of the machine room 21. The support member is provided so as to be movable up and down, and is provided so that the height position of the rotating body 24 can be adjusted. An axis (not shown) parallel to the axes of the sheave 5 and the wheel 6 is fixed to the tip of the support member, and the rotating body 24 is driven to rotate around the axis. Yes.

  As described above, in the present embodiment, a new rotator 24 is provided between the fulcrums of the rope 2 constituting the string, and this is pressed against the rope 2 to change the frequency of the rope string vibration. When the vibration frequency is close to the rope biting vibration frequency, it can be adjusted so as to be separated from the rope biting vibration frequency, so that resonance with the rope biting vibration frequency can be avoided. Comfort can be kept comfortable.

Embodiment 3 FIG.
FIG. 5 shows a configuration of an elevator according to Embodiment 3 of the present invention. Fig.5 (a) is an enlarged view of the suspension vehicle 3 part, FIG.5 (b) is a whole block diagram. In the present embodiment, in addition to the configuration of the first embodiment, a driving machine 7 for performing switching control of pressing and disconnecting the rope 2 with respect to a new rotating body 4 provided between the suspension wheels 3. It is characterized by having. Further, a scale device 8 for detecting the rope tension by detecting the weight in the car is provided, and the signal of the scale device 8 is fed back to the drive machine 7. Note that the signal of the scale device 8 is transmitted to the driving device 7 by wire or wirelessly. For example, as shown in FIG. 5B, the scale device 8 may be arranged at one end of the rope 2 on the car 1 side. However, the present invention is not limited to this, and the weight in the car 1 is detected. If possible, it may be installed in any place. Further, as shown in FIG. 5A, the driving machine 7 includes a fixing member 15 fixed to the bottom surface of the car 1 via a supporting member 17, or a supporting member 16 provided at a central portion of the fixing member 15. However, the present invention is not limited to this case, and it may be installed at any location as long as it can control the pressing and separation of the rotating body 4 from the rope 2.

  The frequency of the rope string vibration is determined by the rope tension and the rope length between the fulcrums as described in the first embodiment. For this reason, in this embodiment, the rope tension which is one of the parameters is detected by the scale device 8. Based on a signal from the scale device 8, if a rope tension (weight in the car) within a predetermined range is generated such that the frequency of the rope string vibration is close to the frequency of the rope biting vibration, the driving machine 7 Only when it is judged, the rotating body 4 provided between the fulcrums of the rope 2 is pressed against the rope 2 by the drive unit 7. When the drive machine 7 determines that the values of the rope string vibration frequency and the rope biting frequency are not close to each other, the rotating body 4 provided between the fulcrums of the rope 2 is separated from the rope 2 by the drive machine 7. Yes. In other words, in the present embodiment, the rotating body 4 is not always pressed against the rope 2 but is pressed only when necessary, so that the rope 2 can be prevented from being worn. Can be equivalent.

  As described above, in the present embodiment, the same effect as in the first embodiment can be obtained, and further, the rotating body 4 provided between the rope fulcrums can be pressed and disconnected from the rope 2. The rotating body 4 presses / disconnects the rope 2 as necessary by feeding back the signal of the scale device 8 that can hold the machine 7 and can grasp the weight in the car 1 to the drive machine 7. Only when the rope tension (weight in the car) is such that the frequency of the rope string vibration is close to the frequency of the rope biting vibration, the rotating body 4 provided between the rope fulcrums is attached to the rope 2. When the rope tension (weight in the cage) is not close to the value of the pressing, rope string vibration frequency and rope biting frequency, the rotating body 4 provided between the rope fulcrums is separated from the rope 2. Since it is controlled by the drive unit 7 as described above, it is possible to adjust the frequency of the rope string vibration with high accuracy in accordance with the rope tension at any time during the operation of the elevator, so that the comfortable riding comfort is reliably maintained. It becomes possible. In addition, since the pressing / separation is switched by the driving machine 7, the rotating body 4 is not always pressed against the rope, but can be pressed only when necessary, and the wear of the rope 2 can be prevented. Reduction of the usage period of the rope 2 can be prevented.

  In addition, in this Embodiment, although demonstrated that the magnitude | size of rope tension | tensile_strength (weight in a cage | basket | car) was determined with the drive machine 7, it is not restricted to that case, The control apparatus which controls the operation of an elevator ( (Not shown), the drive unit 7 may be driven based on a signal from the control device.

Embodiment 4 FIG.
FIG. 6 shows a configuration of an elevator according to Embodiment 4 of the present invention. FIG. 6A is an enlarged view of the machine chamber 21, and FIG. 6B is an overall configuration diagram. In the present embodiment, in addition to the configuration of the second embodiment, the new rotating body 24 provided between the sheave 5 and the wheel 6 of the hoisting machine 20 is controlled to be pressed and disconnected from the rope 2. It is characterized by having a driving machine 7 for this purpose. In addition, the signal of the scale device 8 that can detect the weight in the car 1 can be fed back to the drive unit 7. In FIG. 6 (b), the weight detection scale device 8 shows an example of 1: 1 roping, but in the case of 2: 1 roping, the position of the scale device 8 is as shown in FIG. 5 (b). Will be in the same position.

  As in the third embodiment, in this embodiment, the rotating body 24 is not always pressed against the rope 2, but by pressing only when necessary, the wear of the rope 2 can be prevented, The usage period of the rope 2 can be made equivalent to the conventional one.

  As described above, in the present embodiment, the same effects as those of the above-described second embodiment can be obtained, and further, the rotating body 24 provided between the rope fulcrums can be pressed and disconnected from the rope 2. The rotating body 24 presses / disconnects the rope 2 as necessary by feeding back the signal of the scale device 8 which can hold the machine 7 and can grasp the weight in the car 1 to the drive machine 7. Only when the rope tension (the weight in the car) is such that the frequency of the rope string vibration is close to the frequency of the rope biting vibration, the rotating body 24 provided between the rope fulcrums is attached to the rope 2. When the rope tension (the weight in the cage) is not close to each other, the rotary body 24 provided between the rope fulcrums is separated from the rope 2 when the values of the pressing and rope string vibration frequencies are not close to each other. Because it is controlled by the drive machine 7 as described above, it is possible to adjust the frequency of the rope string vibration with high accuracy in accordance with the rope tension at any time during the operation of the elevator. It becomes possible to hold. Furthermore, since the pressing / separation is switched by the driving machine 7, the rotating body 24 can be always pressed only when necessary, not the rope 24, and the wear of the rope 2 can be prevented. Prevents the use period of the rope 2 from being reduced.

Embodiment 5. FIG.
FIG. 7 shows an enlarged view of the suspension vehicle 3 portion in the configuration of the elevator according to Embodiment 5 of the present invention. Since the overall configuration of the present embodiment is basically the same as that of FIG. 1, description thereof is omitted here.

  In the present embodiment, a sliding member 9 is provided between the suspension wheels 3 instead of the rotating body 4 as shown in FIG. The material of the sliding member 9 is, for example, a soft material having higher flexibility than the rope 2 such as Newlite, and a predetermined value or more that can efficiently adjust the frequency of the rope string vibration. Use one with a coefficient of friction. At this time, similarly to the first embodiment, the frequency of the rope string vibration is changed by pressing the sliding member 9 against the rope 2 and changing the rope length between the fulcrums, thereby changing the frequency of the rope string vibration. It can be separated from the frequency of the rope biting vibration. Further, by using a material softer than the rope 2 for the sliding member 9, the usage period of the rope 2 can be made equivalent to that of the conventional one.

  As described above, in the present embodiment, the sliding member 9 that slides with the rope 2 is provided between the fulcrums of the rope 2, and the sliding member 9 is pressed against the rope 2 to slide on the rope 2. Since the rope length between the fulcrums is changed, the same effect as in the first embodiment can be obtained. In addition, by using a material softer than the rope 2 for the sliding member 9, it is possible to prevent the rope 2 from being worn, and the usage period of the rope 2 can be made equivalent to the conventional one.

Embodiment 6 FIG.
FIG. 8 shows an enlarged view of the machine room 21 portion in the configuration of the elevator according to Embodiment 6 of the present invention. Since the overall configuration of the present embodiment is basically the same as that of FIG. 3, the description thereof is omitted here.

  In this embodiment, a sliding member 9 is provided between the sheave 5 of the hoisting machine 20 and the wheel 6 in place of the rotating body 24. Further, as described in the fifth embodiment, a material softer than the rope 2 is used as the material of the sliding member 9.

  As in the fifth embodiment, the sliding member 9 is pressed against the rope 2, the rope length between the fulcrums is changed, and the frequency of the rope string vibration is changed, so that it can be separated from the frequency of the rope biting vibration. Become. In addition, by using a material (new light or the like) softer than the rope 2 for the sliding member 9, the usage period of the rope 2 can be made equivalent to the conventional one.

  As described above, in the present embodiment, the sliding member 9 that slides with the rope 2 is provided between the fulcrums of the rope 2, and the sliding member 9 is pressed against the rope 2 to slide on the rope 2. Since the rope length between the fulcrums is changed, the same effect as in the second embodiment can be obtained. In addition, by using a material softer than the rope 2 for the sliding member 9, it is possible to prevent the rope 2 from being worn, and the usage period of the rope 2 can be made equivalent to the conventional one.

Embodiment 7 FIG.
FIG. 9 is a diagram illustrating a configuration of an elevator according to the seventh embodiment. In the present embodiment, in addition to the configuration of the fifth embodiment, a driving device 7 is provided for controlling the sliding member 9 provided between the suspension wheels 3 to be pressed against and separated from the rope 2. It is characterized by that. In addition, the signal of the scale device 8 that can detect the weight in the car 1 can be fed back to the drive unit 7. The frequency of the rope string vibration is determined by the rope tension and the rope length between the fulcrums. The rope tension which is one of the parameters is detected by the scale device 8. Sliding provided between the fulcrum of the rope 2 only when the rope tension (weight in the cage) is generated by the signal from the scale device 8 so that the frequency of the rope string vibration is close to the frequency of the rope biting vibration. The member 9 is pressed against the rope 2 by the driving machine 7. When the values of the rope string vibration frequency and the rope biting frequency are not close to each other, the sliding member 9 provided between the fulcrums of the rope 2 is separated from the rope 2 by the driving machine 7. That is, by always pressing the sliding member 9 against the rope 2 instead of pressing the sliding member 9 only when necessary, the sliding member 9 can be prevented from being worn and the replacement period of the sliding member 9 can be lengthened. Can do.

  As described above, in the present embodiment, the same effect as in the fifth embodiment can be obtained, and further, a driving machine for controlling the sliding member 9 to be pressed against and disconnected from the rope 2. 7 is provided, it is possible to adjust the frequency of the rope string vibration with high accuracy in accordance with the rope tension at any time during the operation of the elevator, so that a comfortable riding comfort can be reliably maintained. Furthermore, since the pressing / separation is switched by the driving machine 7, the sliding member 9 is not always pressed against the rope 2 but is pressed only when necessary, thereby preventing the sliding member 9 from being worn. The replacement period of the sliding member 9 can be lengthened.

Embodiment 8 FIG.
FIG. 10 is a diagram illustrating a configuration of an elevator according to the eighth embodiment. In the present embodiment, in addition to the configuration of the sixth embodiment, the sliding member 9 provided between the sheave 5 of the hoisting machine 20 and the wheel 6 is controlled to press and disconnect the rope 2. It is characterized by having a driving machine 7 for performing. In addition, the signal of the scale device 8 that can detect the weight in the car 1 can be fed back to the drive unit 7. In FIG. 10B, the weight detection scale device 8 shows an example of 1: 1 roping, but in the case of 2: 1 roping, the position of the scale device 8 is as shown in FIG. Will be in the same position.

  The frequency of the rope string vibration is determined by the rope tension and the rope length between the fulcrums. The rope tension which is one of the parameters is detected by the scale device 8. Sliding provided between the fulcrum of the rope 2 only when the rope tension (weight in the cage) is generated by the signal from the scale device 8 so that the frequency of the rope string vibration is close to the frequency of the rope biting vibration. The member 9 is pressed against the rope 2 by the driving machine 7. When the values of the rope string vibration frequency and the rope biting frequency are not close to each other, the sliding member 9 provided between the fulcrums of the rope 2 is separated from the rope 2 by the driving machine 7. That is, by always pressing the sliding member 9 against the rope 2 instead of pressing the sliding member 9 only when necessary, the sliding member 9 can be prevented from being worn and the replacement period of the sliding member 9 can be lengthened. Can do.

  As described above, in the present embodiment, the same effect as in the sixth embodiment can be obtained, and further, a driving machine for controlling the sliding member 9 to be pressed against and disconnected from the rope 2. 7 is provided, it is possible to adjust the frequency of the rope string vibration with high accuracy in accordance with the rope tension at any time during the operation of the elevator, so that a comfortable riding comfort can be reliably maintained. Furthermore, since the pressing / separation is switched by the driving machine 7, the sliding member 9 is not always pressed against the rope 2 but is pressed only when necessary, thereby preventing the sliding member 9 from being worn. The replacement period of the sliding member 9 can be lengthened.

  In the above first to eighth embodiments, the two rotating wheels serving as fulcrums of the rope strings are provided in the pair of suspension wheels 3 provided under the car 1 or in the machine room 21. In the above description, the sheave 5 of the hoisting machine 20 and the sorase wheel 6 have been described as examples. However, the present invention is not limited to this. In any case, the rope vibration suppressing device of the present invention is applicable.

It is the block diagram which showed the whole structure of the machine room less elevator apparatus provided with the rope vibration suppression apparatus which concerns on Embodiment 1 of this invention. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 1 of this invention. It is the block diagram which showed the structure of the whole elevator apparatus with a machine room provided with the rope vibration suppression apparatus which concerns on Embodiment 2 of this invention. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 2 of this invention. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 3 of this invention, and the block diagram which showed the structure of the whole elevator apparatus provided with the said rope vibration suppression apparatus. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 4 of this invention, and the block diagram which showed the structure of the whole elevator apparatus provided with the said rope vibration suppression apparatus. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 5 of this invention. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 6 of this invention. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 7 of this invention, and the block diagram which showed the structure of the whole elevator apparatus provided with the said rope vibration suppression apparatus. It is the elements on larger scale which showed the structure of the rope vibration suppression apparatus which concerns on Embodiment 8 of this invention, and the block diagram which showed the structure of the whole elevator apparatus provided with the said rope vibration suppression apparatus.

Explanation of symbols

  1 car, 2 ropes, 3 suspension wheel, 4,24 rotating body, 5, 11, 12, 13, 14 sheave, 6 sorase wheel, 7 drive machine, 8 scale device, 9 sliding member, 10 counterweight, 15 Fixed member, 16, 17 Support member, 18, 19 shaft, 20 hoist, 21 Machine room.

Claims (3)

A rope vibration suppression device for an elevator apparatus including an elevator cage and a counterweight that are lifted and lowered by a hoisting rope hung around two or more rotating vehicles,
It is provided between the rotating wheels and is pressed against the hoisting rope to change the rope length of the hoisting rope between the rotating wheels so that the frequency of the rope biting vibration and the frequency of the rope chord vibration of the rope string match. Rope string vibration frequency adjusting means for adjusting the frequency of the rope string vibration of the rope string configured with each rotating wheel as a fulcrum so as not to resonate ;
Drive means for switching between pressing / disconnecting the rope string vibration frequency adjusting means with respect to the hoisting rope;
Rope tension detecting means for detecting the rope tension of the hoisting rope;
It is determined whether the detected value of the rope tension is within a predetermined range in which the value of the frequency of the rope string vibration is close to the value of the frequency of the rope biting vibration generated at each twisting pitch of the hoisting rope. Determination means ,
Rope vibration characterized in that, when the determination means determines that the detected value of the rope tension is within the predetermined range, the driving means presses the rope string vibration frequency adjusting means against the hoisting rope. Suppression device. The rope vibration suppression device according to claim 1 , wherein the rope string vibration frequency adjusting means is configured by a rotating body provided between the rotating wheels and wound around the hoisting rope. The rope string vibration frequency adjusting means includes a sliding member that is provided between the rotating wheels and slides with the hoisting rope.
The rope vibration suppression device according to claim 1 , wherein the sliding member has higher flexibility than the hoisting rope.

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