JP2003056204A - Coupling vibration control device utilizing rotational inertia force - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling vibration control device utilizing rotational inertia force which can be installed without occupying a wide space in an installing part of a house top part or the like and large rotational inertia force can be obtained. SOLUTION: A ball screw mechanism 14 arranged between two juxtaposed buildings 10 and 12 and taking out a relative displacement amount between both the buildings as a rotational amount of an output side member and a rotational mass body 20 for integrated on the output side member of the ball screw mechanism 14 and arranged between both the buildings are provided, and the rotational inertia force of the rotational mass body is made reaction force to obtain attenuation force. For instance, the output side member of the ball screw mechanism 14 is made a nut member 16 supported rotatably through a bearing member 22 in one building 10, the bearing member 22 can be rotated with a support shaft 26 in the horizontal direction, and a screw shaft member 18 of an input side screwed with and inserted in the nut member 16 is made an input side member. The base end of the screw shaft member 18 is rotatably supported with a support shaft 36 in the horizontal direction while regulating rotation around a shaft in the other building 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention converts a horizontal displacement generated between two buildings standing side by side or between inner and outer buildings of a double structure type into a rotary motion of a mass body, and the rotary inertia force of the mass body converts the horizontal displacement. The present invention relates to a coupled vibration damping device that utilizes a rotational inertial force for damping a building.

[0002]

2. Description of the Related Art In order to control a high-rise building, it is necessary to control bending deformation, and in order to efficiently control this bending deformation, a method of applying a horizontal force to the building top can be considered. That is, in this case, a control moment force obtained by multiplying the applied horizontal force by the building height can be generated, so that a large control force can be efficiently obtained. TMD and AMD are known as damping methods of this kind, but in these devices, an excessive additional mass is required in order to keep the amplitude of the additional mass below the allowable stroke of the device, and it is extremely difficult to realize it. Will be accompanied.

Therefore, for example, Japanese Patent Laid-Open No. 2001-20560
As disclosed in the publication, a rack shaft for extracting the relative displacement amount between the two buildings as an axial movement amount is provided between two buildings, and a pinion meshing with the rack shaft is provided in one of the buildings. It is rotatably supported, and an additional mass body such as a flywheel or a weight is attached to this pinion around its rotation center, and the additional mass body is rotated together with the pinion due to the relative displacement between the two buildings. There has been proposed a coupled vibration damping device that utilizes a rotational inertial force to obtain a damping force by force to damp a building.

[0004]

However, in the above-described conventional vibration damping device utilizing the rotary inertia force, in which the pinion having the additional mass body attached is rotated by the rack shaft, the rotation shaft of the pinion is the rack shaft. And the additional mass will rotate in a plane parallel to the rack axis. Therefore, if the radius of gyration of the additional mass body such as the flywheel or weight is increased in order to increase the rotational inertial force while suppressing the increase in the weight of the vibration control device, a large space is secured for the installation part such as the rooftop. There was a problem that we had to do. Further, in order to increase the rotational inertial force, it is sufficient to amplify the amount of movement of the rack axis due to the relative displacement of both buildings and convert it to the amount of rotation of the pinion and transmit it. The amplification factor is the unit length of the rack axis. Although it is determined by the relationship between the number of teeth per contact and the number of teeth of the pinion, the size cannot be reduced so much because the additional mass is attached to and supported by the pinion, so there is a limit to obtaining a large amplification factor. there were. Therefore, it is conceivable to provide a plurality of pinions with additional mass bodies engaged with the rack shafts, but this causes a problem that the space occupied by the installation portion further increases.

The present invention has been made in view of the above conventional problems, and an object thereof is to be able to install it without occupying a wide space in an installation part such as a rooftop and to have a sufficiently large rotational inertia force. It is an object of the present invention to provide a coupled vibration damping device that utilizes the rotational inertial force.

[0006]

In order to achieve such an object, a coupled vibration damping device utilizing a rotary inertia force of the present invention is provided between two buildings standing in parallel, or between an inner building and an outer building of a double structure type. A ball screw mechanism that is arranged and takes out a relative displacement amount between the two buildings as a rotation amount of the output side member; and a rotating mass body that is integrated with the output side member of the ball screw mechanism and that is arranged between the two buildings. It is characterized in that the damping force is obtained by the rotational inertial force of the rotating mass body.

Here, the output side member of the ball screw mechanism is a nut member rotatably supported in one building through a bearing member, and an input side screw shaft member threadably inserted into the nut member. Can be used as the input side member, and the base end portion of the screw shaft member can be configured to be supported by the other building while restricting rotation around the axis.

Alternatively, the output side member of the ball screw mechanism is a screw shaft member, the rotary mass body is integrally provided at an intermediate portion of the screw shaft member, and both ends of the screw shaft member are mutually provided. The threaded portion formed as a reverse screw may be threadedly inserted into a nut member provided in both buildings as an input side member.

Further, it is preferable that the rotary mass body has a structure in which an additional mass body movable in the radial direction and a turning radius adjusting mechanism capable of fixing and adjusting the additional mass body at an arbitrary position in the radial direction. .

Further, it is desirable to provide a damper between the two buildings.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a conceptual diagram of a linked vibration damping device utilizing a rotary inertia force according to the present invention, and FIG.
FIG. 4 shows a specific embodiment thereof, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a view taken along the line IV-IV in FIG.

The basic structure of the coupled vibration damping device of the present invention is arranged between two buildings 10 and 12 standing in parallel, or between inner and outer buildings 10A and 12A (see FIG. 6) of a double structure type,
A ball screw mechanism 14 for extracting the relative displacement amount in the horizontal direction between both buildings as the rotation amount of the output side member, and an additional mass body 20 integrally attached around the rotation axis of the output side member of the ball screw mechanism 14 are provided. The damping force is obtained by the rotational inertial force of the mass body.

That is, in the coupled vibration damping device of the present embodiment, the ball screw mechanism 14 as a displacement transmitting means is arranged between the rooftops of the first building 10 and the second building 12 which are juxtaposed in close proximity to each other. Composed. This ball screw mechanism 14
Is a nut member 16, a screw shaft member 18 threadedly inserted into the nut member 16, and a myriad of balls that continue to circulate through a passage formed in the nut member 16 interposed between the threaded portions. (Not shown), and in this embodiment, the nut member 16 is one building 1
0 is rotatably supported via the bearing member 22 and is set as an output side member, while the screw shaft member 18 has its base end portion restricted to the other second building 12 from rotating about its axis. Is supported and set as an input side member.

That is, the bearing member 22 is the bearing portion 2
2a and a base 22b that is integral with the bearing 22a. The base 22b is mounted on a sliding plate 24 laid on the upper surface of the roof of the first building 10. A support shaft 26, which penetrates through the sliding plate 24 and projects upward, is integrally erected and fixed to the rooftop at the sliding plate 24 portion.
A shaft hole 22c formed in 2b is fitted into the support shaft 26, so that the bearing member 22 can swing on the slide plate 24 about the support shaft 26. Further, the bearing portion 22 is provided horizontally such that the shaft center of the bearing hole 22d is directed to the other second building 12, and the nut member of the ball screw mechanism 14 is provided in the bearing hole 22d via a bearing (not shown). 16 is rotatably supported.

Both ends of the nut member 16 are bearing members 2
2 and the flange portions 16a, 1
6b is formed to have an enlarged diameter, and the flange portions 16a, 1
6b abuts on both end surfaces of the bearing member 22 to restrict movement in the axial direction. The flange portion 16b of the nut member 16 on the second building side is the side wall surface 1 of the first building 10.
0a, and a disk-shaped flywheel 28 as an additional mass body 20 on the end surface of the flange portion 16b thereof.
Is coaxial with the insertion hole 28a of the screw shaft member 18 at the center thereof.
Has been fixed. Further, on the outer peripheral surface of the flywheel 28, a plurality of weight attachment bolts 30 radially extending outward in the radial direction are provided upright, and each weight attachment bolt 30 has a weight as an additional mass body 20. 32
Are screwed together and fixedly and adjustablely attached by a double nut (not shown) at any position in the radial direction of rotation.

The screw shaft member 18 of the ball nut mechanism 14
The threaded portion 18a formed at one end thereof is threadably inserted into the nut member 16, while the sleeve 34 having the shaft hole 34a directed upward is integrally provided at the base end portion on the other end side. The sleeve 34 is fitted to a support shaft 36 standing on the roof of the second building 12 and rotatably supported.

That is, the additional mass body 20 of the flywheel 28, the weight mounting bolt 30, and the weight 32 integrally mounted on the nut member 16 is the first building 10 and the second building 12.
And a screw mechanism of the weight 32 and the weight mounting bolt 30 is arranged so as to rotate about the axis of the screw shaft member 18 as a rotation center. Is a turning radius adjusting mechanism 38 for adjusting.

In this embodiment, the first building 10 and the second building 10
A damper 40 is rotatably attached between the building 12 and both ends of the damper 40 by being pin-connected to the both buildings 10, 12. Here, in the illustrated example, the damper 40 is a hydraulic type, but another type such as a friction type may be used.

In the coupled vibration damping device of the present embodiment having the above-mentioned configuration, when vibration is generated by an earthquake or wind and relative displacement is generated between the first and second buildings 10 and 12 standing in parallel,
The bearing member 22 supporting the nut member 16 of the ball screw mechanism 14 and the sleeve 3 at the base end of the screw shaft member 18.
4 rotates in the horizontal direction, following the relative displacement direction of both buildings 10, 12. Then, the spindle 26 on the first building 10 side that rotatably supports the bearing member 22, and the screw shaft member 18
The relative displacement (that is, the change in distance between the two support shafts 26, 36) that occurs between the support shaft 36 on the second building 12 side that rotatably supports the nut member 16 and the screw shaft member 18 of the ball screw mechanism 14. Linearly acting on the threaded portion of the nut member 16 along its axial direction, and as a result, the nut member 16 is rotated at the amplification amount and the rotation speed corresponding to the thread pitch of the threaded portion. The flywheel 28, the weight 32, and the like of the additional mass body 20 that are integrally provided in the same also rotate together.

Therefore, the rotary mass body composed of the nut member 16, the flywheel 28, the weight mounting bolt 30 and the weight 32 generates a rotary inertia force with the relative displacement of the first and second buildings 10 and 12. However, the rotational inertial force can be used as a reaction force to suppress the first and second buildings 10 and 12. At this time, since the screw shaft member 18 mainly receives the relative displacement load as a compressive force in the axial direction having a large strength, the screw shaft member 18 can sufficiently cope with a large relative displacement amount between the two buildings 10 and 12. Therefore, even if an excessive relative displacement occurs between the buildings 10 and 12 due to a large earthquake or the like, the vibration damping function can be sufficiently ensured.

Further, as is well known, the rotational inertia force causes the rotational speed ω even if the total mass of the rotary mass body including the nut member 16 and the flywheel 28 of the additional mass body 20 and the weight 32 is constant. And the mass of the weight 32 of the additional mass and its rotation radius r, the magnitude of the rotational inertial force is proportional to the square of the rotation radius r, and the rotation speed ω
However, the reciprocating linear motion of the screw shaft member 18 due to the relative displacement of the two buildings 10 and 12 is proportional to the nut member 16
By appropriately setting the screw pitch (amplification factor) of the ball screw mechanism 14 for converting into the reciprocating swing rotary motion of, and the turning radius r and the mass of the weight 32 which is the additional mass body,
A desired rotational inertia force (that is, damping force) can be easily obtained.

Furthermore, the flywheel 28 and the weight 32 of the additional mass are attached to the end surface of the nut member 16 to make the first
The side walls 10a of the building 10 are laterally projected and spaced apart, and can be rotated in the vertical plane in the space between the buildings 10 and 12 about the axis of the screw shaft member 18, so that the two buildings 10 that are in parallel are Even if 12 are close to each other and the space between them is narrow, the additional mass body 20 including the flywheel 28 and the weight 32 can be easily installed in the space.
The rotation radius r of the weight 32 can also be increased as much as possible to increase the rotational inertial force while suppressing the increase in weight. In addition, the additional mass body 20 does not occupy a large space on the rooftop, and thus the installability is excellent.

In addition, the adjusting mechanism 3 for the turning radius r of the weight 32
In the present embodiment having No. 8, the rotational radius r can be adjusted at any time even after the installation, so that the rotational inertial force to be generated can be adjusted, and the damping force characteristic as the vibration damping device is more suitable. You can easily adjust to things.

Further, in the present embodiment, the damper 40 provided in the vibration input direction allows the first and second buildings 10, 12 to be installed.
However, the damper 28 is not always necessary.

FIG. 5 is a side view showing another embodiment.
In the coupled vibration damping device of this embodiment, the ball screw mechanism 14
The screw shaft member 18 of is used as the output side member, and the nut member 16
Is the input side member. That is, a flywheel 28 is integrally provided at substantially the center of the axially intermediate portion of the screw shaft member 18, and the weight mounting bolt 30 is attached to the outer peripheral surface of the flywheel 28 as in the above-described embodiment. A plurality of weights 32 that are screwed together and whose turning radius r can be adjusted are attached. The screw shaft member 18 is provided at both ends with screw portions 18a and 18b formed in opposite spiral directions, and these screw portions 18a and 18b are provided in both buildings 1.
The nut members 16 and 16 provided on the rooftops of Nos. 0 and 12 facing each other are screwed and inserted. Each of the nut members 16 and 16 includes a bearing member 22 and a flange portion 16 thereof.
The a and 16b are fixedly installed by bolts or the like, and their rotation is regulated so as to be integrated. The bearing member 22 of the a and 16b is also the sliding plate 24 laid on the upper surface of the roof as in the above-described embodiment. It is mounted on and is supported by the support shafts 26, 26 so as to be rotatable in the horizontal direction.

According to this structure, the relative displacement in the horizontal direction generated between the buildings 10 and 12 is the input side member of the ball screw mechanism 14 and the two nut members 16 and 16 formed in mutually reverse threads. And the screw shaft member 18, which is an output side member screwed to the screw shaft member 18, acts on the screw parts 18a and 18b at both ends, and rotates the screw shaft member 18 together with the flywheel 28 and the weight 32 of the additional mass 20. Let

Even in this case, the additional mass body 20 is 2
In the space between the two buildings 10 and 12, since they are rotated in the vertical plane around the axis of the screw shaft member 18, both buildings 10 and 12
Are close to each other and the space between both buildings 10 and 12 is narrow,
The flywheel 28, the weight 32, and the like of the additional mass body 20 that is rotationally operated can be easily arranged in the space, and the same operational effects as the above-described embodiment can be obtained.

The linked vibration damping device of each of the above-mentioned embodiments is
Although the case where the two buildings 10 and 12 are provided between the two first and second buildings 10 and 12 which are juxtaposed to each other to suppress the vibration is disclosed, the present invention is not limited to this, and as shown in FIG. A connection damping device is installed between the outer buildings 10A and 12A,
The function of damping the outer buildings 10A and 12A can be exerted.

Further, in each of the above-mentioned embodiments, the case where the roof tops of the two first and second buildings 10 (10A) and 12 (12A) standing side by side are connected by the connection damping device to suppress the vibration is exemplified.
The present invention is not limited to this, and for example, as shown in FIG. 7, the coupled vibration damping device includes an intermediate floor portion of a high-rise building 10B and a low-rise building 12B.
The rooftop of B may be connected and provided. Alternatively, high-rise buildings may be connected to each other by connecting vibration damping devices at appropriate floors such as an intermediate floor.

Further, in each of the above embodiments, the bearing member 22 and the screw shaft member 18 of the nut member 16 are rotatably attached to the buildings 10 and 12 in the horizontal direction, respectively. At least one of the members 18 is integrally fixed to a building that supports the member 18, and the other is orthogonal to the screw shaft member in the horizontal relative displacement generated in both buildings by using a linear bearing or the like. The building may be supported by allowing relative movement in the directions.

[0031]

INDUSTRIAL APPLICABILITY As described above, in the coupled vibration damping device utilizing the rotational inertia force according to the present invention, between two buildings standing in parallel due to an earthquake or wind, or inside or outside of a double structure type. When a relative displacement due to vibration occurs between buildings, this relative displacement is converted by a ball screw mechanism into a rotational displacement using the nut member or screw shaft member as an output member, and this output member is integrally attached to this. A rotating inertial force is generated by rotating together with the additional mass body, and this rotating inertial force can be used as a reaction force for damping to obtain a damping force.

Since the additional mass body is rotated in the vertical plane around the axis of the screw shaft member in the space between the two buildings, even if the two buildings are close to each other and the space between them is narrow, the additional mass body rotates. The flywheel and weight of the added mass body to be operated can be easily arranged in the space, and the space is not occupied inside the building or the rooftop, and the installation is extremely excellent.

The rotational inertia force, which is the reaction force for damping, is easily set to a desired value by appropriately setting the screw pitch (amplification factor) of the ball screw mechanism and the radius of gyration of the weight as the additional mass body. In addition, if a mechanism for adjusting the radius of gyration of the weight is provided, it is possible to adjust the radius of gyration and adjust the rotational inertia force at any time even after the installation of the weight. The damping force characteristic of the vibration device can be easily adjusted to a more suitable one.

Further, by providing a damper in the vibration input direction, vibration damping of the first and second buildings can be further promoted.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a coupled vibration damping device using a rotary inertia force according to the present invention.

FIG. 2 is a side view showing a specific embodiment of a coupled vibration damping device utilizing a rotary inertia force according to the present invention.

FIG. 3 is a plan view of the embodiment shown in FIG.

FIG. 4 is a view taken along the line IV-IV in FIG.

FIG. 5 is a plan view showing another embodiment of the coupled vibration damping device of the present invention.

FIG. 6 is a schematic plan view showing another embodiment of a building structure to which the coupled vibration damping device of the present invention is applied.

FIG. 7 is a conceptual diagram when the coupled vibration damping device according to the present invention is applied between a high-rise building and a low-rise building.

[Explanation of symbols]

10 First Building 10A building 10B high-rise building 12 Second Building 12A outside building 12B low-rise building 14 Ball nut mechanism 16 Nut member 18 Screw shaft member 18a, 18b screw part 20 Additional mass body (rotating mass body) 28 flywheel 30 Weight mounting bolt 32 weights 38 Turning radius adjustment mechanism 40 damper

─────────────────────────────────────────────────── ───Continued from the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16H 25/24 F16H 25/24 A G Z

Claims (5)

[Claims] 1. A ball screw mechanism arranged between two buildings standing in parallel, or between an inner building and an outer building of a double structure type, for extracting a relative displacement amount between the two buildings as a rotation amount of an output side member, and the ball screw mechanism. And a rotating mass body that is integrated between the output side members of the rotating mass body and disposed between the two buildings, and a damping force is obtained by the rotating inertia force of the rotating mass body. apparatus. 2. The output side member of the ball screw mechanism is a nut member rotatably supported in one building via a bearing member, and the input side screw shaft member screwed into the nut member is The coupled vibration damping device using rotary inertia force according to claim 1, wherein the base end portion is supported by the other building while being restricted from rotating about its axis. 3. The output side member of the ball screw mechanism is a screw shaft member, the rotary mass body is integrally provided at an intermediate portion of the screw shaft member, and the opposite ends are opposite to each other. The screw portion formed on the screw is threadedly inserted into a nut member provided in both buildings.
A vibration damping device utilizing the described rotational inertial force. 4. The rotating mass body includes an additional mass body that is movable in the radial direction and a turning radius adjusting mechanism that can adjust the additional mass body to an arbitrary radial position. Item 10. A linked vibration damping device utilizing the rotational inertial force according to any one of items 1 to 3. 5. The vibration damping device utilizing rotary inertia force according to claim 1, wherein a damper is provided between the two buildings.