JP6942527B2 - Vertical movement suppression device and vibration control device - Google Patents

Description

The present invention relates to a vertical movement suppressing device and a vibration damping device for a vibration system.

In order to suppress the vibration of structures such as high-rise buildings and steel towers due to wind, a vibration damping device consisting of a mass (weight), a wire for suspending the mass, and a frame for supporting the wire is used (for example, a patent). Document 1). Such a vibration damping device is installed on the upper layer or roof of a structure having a large amplitude, and the mass swings in the horizontal direction at a cycle synchronized with the natural frequency of the structure as the structure vibrates. , Reduces the horizontal vibration response of the structure. The natural frequency of the mass in the horizontal direction is appropriately set according to the mass of the mass, the length of the suspended wire, and the like.

On the other hand, as a vibration damping damper used for braces provided on columns and beams, for example, as described in Patent Document 2, it is composed of a shaft member, an inner cylinder, and an outer cylinder, and is composed of an inner cylinder and an outer cylinder. It is known that the shaft member and the inner cylinder are filled with a viscoelastic material that absorbs vibration energy when the outer cylinder is displaced relative to the cylinder. One end of the shaft member is exposed from the outer cylinder, and when one end side of the shaft member is pulled in the direction of being pulled out from the outer cylinder, the shaft member moves integrally with the inner cylinder, and when pulled in the opposite direction, the shaft member moves. Is configured to move separately from the inner cylinder. On one end side of this damping damper, an end portion exposed from the outer cylinder of the shaft member is attached to the end plate. At the other end of the damping damper, the end of the outer cylinder is attached to the U-shaped plate.

Japanese Unexamined Patent Publication No. 2014-177999 Japanese Patent No. 3845838

Although the vibration response in the horizontal direction of the structure can be reduced by the vibration damping device as in Patent Document 1, the natural frequency in the vertical direction determined by the axial rigidity of the mass and the wire of the vibration damping device and It is assumed that the vertical movement of the mass increases due to the proximity of the natural frequency in the vertical direction of the structure.
The frame structure of the vibration damping device, the connection between the wire and the frame, the connection between the wire and the mass, and the like have been determined after sufficient verification, and cannot be easily changed. A nut-shaped member coupled around the axis of the wire is typically used for the connection portion with the wire.
Considering the structure of the connecting portion, when the shaft member is pulled in the direction of being pulled out from the outer cylinder, the vibration damping device composed of the mass, the suspension wire, and the frame is connected to the shaft member and the inner cylinder as in Patent Document 2. It is difficult to apply a damping damper having both ends configured so that the shaft member and the inner cylinder and the outer cylinder are not relatively displaced when the outer cylinder is relatively displaced and pulled in the opposite direction.
Further, in the vibration damping damper of Patent Document 2, when the shaft member is pulled in the direction opposite to the direction in which the shaft member is pulled out from the outer cylinder, the inner cylinder and the outer cylinder are not relatively displaced, so that the viscoelastic body absorbs the vibration energy. Not done. Therefore, even if the vibration damping damper of Patent Document 2 can be applied, the effect of reducing the response of the vertical movement of the vibration system is not sufficient.

From the above, the present invention is a vertical movement suppressing device capable of sufficiently suppressing the vertical movement of the vibration system without having to change the structure of the connection on both sides in the axial direction of the wire, and a vibration damping device provided with the vertical movement suppressing device. The purpose is to provide.

The vertical movement suppression device of the present invention is a vertical movement suppression device that suppresses vibration in the vertical direction, and is a cylinder arranged around the axis of a shaft member extending in the vertical direction and one side of the shaft member in the axial direction. A first elastic body seal that seals between the cylinder and the shaft member, and a second elastic body seal that seals between the cylinder and the shaft member on the other side in the axial direction of the shaft member, and a viscous material or sticky material. It is made of an elastic material and is supported by a viscous filler that fills the inside of the cylinder and a shaft member that projects radially outward from the shaft member and can move up and down inside the cylinder as the shaft member is displaced in the axial direction. A vertical movement suppressing device including one or more movable members and one or more fixing members that are installed on the inner wall of the cylinder and project inward in the radial direction and can compress a viscous filler between the movable members. Is characterized in that the movable member and the fixed member overlap each other when viewed in a plan view.

In the vertical movement suppressing device of the present invention, the shaft member includes a wire and a first mounting portion and a second mounting portion, both of which are coupled around the shaft of the wire, and the first elastic body seal is a cylinder. It is preferable to seal between the first mounting portion and the second elastic body seal between the cylinder and the second mounting portion.

The vertical movement suppressing device of the present invention further includes one or more movable members that protrude outward in the radial direction from the shaft member and are supported by the shaft member so as to be vertically movable inside the cylinder as the shaft member is displaced in the axial direction. ..

In the vertical movement suppressing device of the present invention, one or more fixing members which are installed on the inner wall of the cylinder, project inward in the radial direction, and can compress the viscous filler between the movable member and the movable member are further provided .

The vertical movement suppressing device of the present invention further includes a conversion mechanism that is connected to the shaft member and converts the axial displacement of the shaft member into a rotational movement around the shaft. It has an inner cylinder that is arranged and rotated about an axis by a conversion mechanism, and the viscous filler is preferably filled between the inner wall of the cylinder and the outer wall of the inner cylinder.

Further, the vertical movement suppressing device of the present invention has a cylinder arranged around the axis of the shaft member extending in the vertical direction, an elastic body that supports the cylinder on the shaft member, and is provided on the shaft member and comes into contact with the inner wall of the cylinder. The shaft member comprises a wire and a mounting portion coupled around the axis of the wire, and the elastic body is mounted between the cylinder and the mounting portion. And.
It is preferable to use a brush as the friction-imparting material.

In the vertical movement suppressing device of the present invention, the shaft member has a wire and a mounting portion coupled around the shaft of the wire, and the elastic body is mounted between the cylinder and the mounting portion .

In the vertical movement suppressing device of the present invention, it is preferable to further include a viscous body made of a viscous material or a viscoelastic material and arranged on the inner wall of the cylinder.

In the vertical movement suppressing device of the present invention, a viscous filler made of a viscous material or a viscoelastic material and filled inside a cylinder, and a first elastic body seal and a second elastic body seal as elastic bodies, respectively, are used. The first elastic body seal may seal between the cylinder and the shaft member on the upper side of the cylinder, and the second elastic body seal may seal between the cylinder and the shaft member on the lower side of the cylinder. preferable.

The vibration damping device of the present invention is characterized by including a mass, a shaft member for suspending the mass, a frame for supporting the shaft member, and the above-mentioned vertical movement suppressing device provided on the shaft member.

In the vibration damping device of the present invention, the shaft member has a wire and a first mounting portion and a second mounting portion, both of which are coupled around the axis of the wire, and the first mounting portion is coupled to the frame. , The second mounting portion is preferably coupled to the mass.

According to the present invention, since the shaft member is softly coupled to the cylinder by the elastic body of the vertical movement suppressing device, the cylinder and the shaft member that try to stay in place when the shaft member is displaced in the axial direction. A relative displacement in the vertical direction occurs between the two. At this time, based on the viscous resistance of the viscous filler filled inside the cylinder and the frictional resistance of a brush or the like provided on the shaft member and in contact with the inner wall of the cylinder, vibration damping is sufficient to suppress vertical movement. Can be sufficiently applied to suppress the vertical movement of the vibration system and the structure.

It is a figure which shows the vibration damping device as an application object common to each embodiment of this invention. A vertical movement suppressing device according to the first embodiment is shown, (a) is a vertical sectional view, and (b) is a sectional view taken along line IIb-IIb of (a). A vertical movement suppressing device according to a second embodiment is shown, (a) is a vertical sectional view, and (b) is a sectional view taken along line IIIb-IIIb of (a). A vertical movement suppressing device according to a third embodiment is shown, and FIG. 3A is a vertical cross-sectional view. (B) is a figure which shows the member attached to the inner wall of a cylinder in the IVbd-IVbd line of (a). (C) is a diagram showing a wire-attached member applicable to the member shown in (b). (D) is a sectional view taken along line IVbd-IVbd of (a) (the wire is not shown). (E) is a diagram showing a wire-attached member applicable to the member shown in (d). A vertical movement suppressing device according to a fourth embodiment is shown, (a) is a vertical cross-sectional view, and (b) is a Vb-Vb line cross-sectional view of (a). A vertical movement suppressing device according to a fifth embodiment is shown, (a) is a vertical cross-sectional view, and (b) is a VIb-VIb line cross-sectional view of (a). A vertical movement suppressing device according to a sixth embodiment is shown, (a) is a vertical cross-sectional view, and (b) is a VIIb-VIIb line cross-sectional view of (a). A vertical movement suppressing device according to a seventh embodiment is shown, (a) is a vertical sectional view, and (b) is a sectional view taken along line VIIIb-VIIIb of (a).

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
First, with reference to FIG. 1, the vibration damping device 10 as an application target common to the first to seventh embodiments will be described.
The vibration damping device 10 shown in FIG. 1 is installed mainly on the upper floor 10F or a rooftop portion of a high-rise building such as a building or a steel tower as a countermeasure against wind sway or an earthquake.
The vibration damping device 10 includes a vibration system 100 including a mass 11, a plurality of shaft members 12 that suspend the mass 11 so as to be swingable, and a metal frame 13 that supports the shaft members 12. Be prepared.

The mass 11 is a weight that gives a predetermined mass to the vibration system 100. The shape and material of the mass 11 can be appropriately determined. The mass 11 can be cast using a metal material such as iron. Alternatively, the mass 11 may be composed of reinforced concrete.

Each shaft member 12 includes a steel wire 12W that oscillates the mass 11 and a first mounting portion 121 and a second mounting portion 122 that are coupled around the axis of the wire 12W.
The first mounting portion 121 and the second mounting portion 122 are nut-shaped metal members coupled around the axis of the wire 12W.
Vertical movement suppression devices 1 to 7, which will be described later, are installed around the respective axes of the plurality of shaft members 12.

The frame 13 includes a plurality of pillars 13A, a beam 13B connecting the pillars 13A, and an auxiliary beam 13C, and the mass 11 is suspended by the shaft member 12. Each of the plurality of columns 13A is installed on the base 14 as a rigid body on the floor 10F.

The first mounting portion 121 of the shaft member 12 is connected to the auxiliary beam 13C of the frame 13.
The second mounting portion 122 of the shaft member 12 is coupled to the mass 11.
The vibration damping device 10 of the present embodiment includes four shaft members 12. An appropriate number of shaft members 12 can be provided according to the shape of the frame 13 and the mass 11.

The natural frequency of the vibration system 100 of the vibration damping device 10 in the horizontal direction is appropriately set so as to suppress the vibration response in the horizontal direction of the building floor 10F depending on the length of the wire 12W, the mass of the mass 11, and the like. When horizontal vibration is input to the floor 10F, the mass 11 swings in a cycle synchronized with the horizontal natural frequency of the floor 10F, so that the entire building including the floor 10F is oscillated in the horizontal direction. Vibration response is reduced.

_{Here, if the natural frequency f 1 in} the vertical direction (vertical direction) of the vibration system 100 and the natural frequency f ₀ of the floor 10F are close to each other, the vibration in the vertical direction becomes larger due to the resonance phenomenon. Is assumed. In order to prevent this, the vertical movement suppression devices 1 to 7 described below are used.

[First Embodiment]
The vertical movement suppression device according to the first embodiment of the present invention will be described.
The vertical movement suppressing device 1 shown in FIGS. 2 (a) and 2 (b) includes a cylindrical cylinder 20 arranged around the axis of a shaft member 12 extending in the vertical direction, a first elastic body seal 21, and a second elastic body seal 21. The elastic body seal 22 and the viscous filler 23 to be filled inside the cylinder 20 are provided.

The first elastic body seal 21 is formed in an annular shape, and seals between the inner wall 20A of the upper end portion of the cylinder 20 and the outer peripheral portion of the first mounting portion 121 on the upper side in the axial direction of the shaft member 12. .. The first elastic body seal 21 softly connects the upper end portion of the cylinder 20 and the shaft member 12.
The second elastic body seal 21 is also formed in an annular shape, and seals between the inner wall 20A of the lower end portion of the cylinder 20 and the outer peripheral portion of the second mounting portion 122 on the lower side in the axial direction of the shaft member 12. .. The second elastic body seal 21 softly connects the lower end portion of the cylinder 20 and the shaft member 12.
The first mounting portion 121 and the second mounting portion 122 can be made of an elastic material such as rubber that can seal the gap between the first and second mounting portions 121 and 122 and the cylinder 20. The cylinder 20 is supported by the shaft member 12 via the first and second elastic body seals 21 and 22.

The viscous filler 23 is made of a viscous material or a viscoelastic material using a polymer compound. Both the viscous material and the viscoelastic material have viscosity, and the viscoelastic material has elasticity in addition to viscosity. The viscous filler 23 made of a viscous material is, for example, a liquid material such as silicone oil. The viscous filler 23 made of a viscoelastic material is, for example, configured in a jelly-like form that retains fluidity. The viscous filler 23 is fluid, whether it is made of a viscous material or a viscoelastic material. Both ends of the cylinder 20 are sealed by the first and second elastic body seals 21 and 22 so that the viscous filler 23 does not flow out to the outside of the cylinder 20.
In order to obtain a sufficient vibration damping effect from the viscous filler 23, it is preferable that the viscous filler 23 is fully filled inside the cylinder 20, but a gap is left in the upper part inside the cylinder 20. May be. It is assumed that the viscous filler 23 is "filled" inside the cylinder 20 even if the voids are left.

When the vibration damping device 10 (FIG. 1) is installed, the vertical movement suppressing device 1 is assembled in advance on the shaft member 12, and the mass 11 is suspended by the assembly of the shaft member 12 and the vertical movement suppressing device 1. be able to.
The vertical movement suppressing device 1 can also be applied to the existing vibration damping device 10. In that case, for example, the construction is carried out according to the following procedure.
By removing the mass 11 from the second mounting portion 122 and passing the shaft member 12 through the cylinder 20 from the second mounting portion 122 side, the cylinder 20 is arranged around the shaft of the shaft member 12. When using the half-split body of the cylinder 20 (see FIG. 4D), it is not necessary to remove the mass 11. After arranging the half-split body around the shaft member 12, welding may be performed.

If the cylinder 20 is arranged around the shaft member 12, the second elastic body seal 22 is mounted between the second mounting portion 122 and the inner wall 20A of the cylinder 20.
Next, the viscous filler 23 is filled into the cylinder 20 from the upper end side of the cylinder 20 until the tank is almost full.
Then, the first elastic body seal 21 is mounted between the inner wall 20A of the upper end portion of the cylinder 20 and the first mounting portion 121.
With the above, the construction of the vertical movement suppressing device 1 is completed.

The operation of the vertical movement suppression device 1 will be described.
Since the shaft member 12 is softly coupled to the cylinder 20 by the first and second elastic body seals 21 and 22, the shaft member 12 is displaced greatly due to the proximity of the natural frequency between the floor 10F and the vibration system 100 described above. When pulled or contracted in the axial direction, the cylinder 20 tries to stay in place without moving. At this time, the viscous filler 23 filled inside the cylinder 20 dissipates the vibration energy by converting the vibration energy of the relative displacement between the cylinder 20 and the shaft member 12 into heat. That is, it is possible to apply damping to the vertical movement of the vibration system 100 and the floor 10F and suppress the vertical movement.

Here, since the shaft member 12 and the cylinder 20 are softly connected by the first and second elastic body seals 21 and 22, the relative displacement between the shaft member 12 and the cylinder 20 is large, and the relative speed is also large.
If the damping force, which is the force generated by the viscous filler 23, which is the damping element, is F [N], the damping coefficient is c [Ns / m], and the velocity is v [m / s], then one degree of freedom damping free vibration F = cv as the basic equation of, and a damping force F proportional to the relative velocity v between the shaft member 12 and the cylinder 20 can be obtained.
Therefore, the vertical movement suppressing device 1 can obtain a sufficient vertical movement suppressing effect that is sufficient for suppressing the vertical movement.

According to the vertical movement suppressing device 1 of the present embodiment, the existing mounting portions 121 and 122 can be easily mounted without changing the connecting structure between the shaft member 12 and the mass 11 and the connecting structure between the shaft member 12 and the frame 13. Although it has a structure that can be installed, it can sufficiently suppress the vertical movement of the vibration system.

[Second Embodiment]
Next, the vertical movement suppressing device 2 according to the second embodiment of the present invention will be described with reference to FIGS. 3A and 3B.
In each of the following embodiments, the matters different from those of the first embodiment will be mainly described. The same reference numerals are given to the same configurations as those in the first embodiment.
The vertical movement suppressing device 2 of the second embodiment includes a plurality of movable fins 24 (movable members) in addition to the components included in the vertical movement suppressing device 1 (FIG. 2) of the first embodiment. The vertical movement suppressing device 2 may include a single movable fin 24.

The movable fin 24 projects radially outward from the wire 12W, and is supported by the wire 12W so as to be able to move up and down inside the cylinder 20 as the shaft member 12 expands and contracts (displacement in the axial direction).
As shown in FIG. 3B, the movable fin 24 of the present embodiment is a circular plate-shaped member, and a predetermined clearance is set between the inner wall 20A of the cylinder 20 and the outer end 24A of the movable fin 24. Has been done.
The form of the movable fin 24 is not limited to a circular plate shape, and can be appropriately determined as long as it moves up and down as the wire 12W expands and contracts, thereby imparting viscous resistance to the viscous filler 23.

According to the vertical movement suppressing device 2, as in the vertical movement suppressing device 1 of the first embodiment, the viscous filler 23 moves the damping force F proportional to the relative speed v between the shaft member 12 and the cylinder 20 up and down. The viscous resistance can be imparted to the viscous filler 23 by the movable fin 24. Therefore, since the damping at the same speed v is increased, the effect of suppressing the vertical movement of the vibration system can be more sufficiently obtained.

In the present embodiment, a large number of movable fins 24 having the same shape are arranged in the cylinder 20 at equal intervals in the vertical direction over the entire length direction of the wire 12W. However, as long as the effect of increasing damping can be obtained, movable fins 24 may be provided only in a part of the section of the wire 12W in the length direction, a plurality of movable fins 24 having different shapes may be used, or adjacent movable fins 24 may be provided. You can also change the interval.

[Third Embodiment]
Next, the vertical movement suppressing device 3 according to the third embodiment of the present invention will be described with reference to FIGS. 4A to 4E.
The vertical movement suppressing device 3 of the third embodiment has fixed fins 25 (fixing members) on the inner wall 20A of the cylinder 20 in addition to the components provided by the vertical movement suppressing device 2 (FIG. 3) of the second embodiment. Be prepared.
The fixed fin 25 is installed on the inner wall 20A and projects inward in the radial direction. When the cylinder 20 and the shaft member 12 are relatively displaced in the vertical direction, the movable fin 24 moves up and down with the axial displacement of the wire 12W with respect to the fixed fin 25 whose position is substantially fixed. Therefore, the viscous filler 23 is compressed between the fixed fin 25 and the movable fin 24.

The fixed fins 25 are installed on the inner wall 20A at predetermined intervals in the vertical direction by the number corresponding to the movable fins 24 so as to be staggered with the movable fins 24.
As the smallest unit, it is permissible to provide one movable fin 24 and one fixed fin 25.

A plan view of the vertical movement suppressing device 3 from the vertical direction so that the viscous filler 23 is compressed between the movable fin 24 and the fixed fin 25 when the cylinder 20 and the shaft member 12 are relatively displaced in the vertical direction. At that time, the movable fin 24 and the fixed fin 25 overlap each other.

According to the vertical movement suppressing device 3, in addition to the damping effect obtained by the first embodiment and the second embodiment, the viscous filler 23 is compressed between the movable fin 24 and the fixed fin 25, so that the viscous filler 23 moves up and down. A damping effect can be obtained by applying a dynamic load. Therefore, since the damping at the same speed v is increased, the effect of suppressing the vertical movement of the vibration system can be more sufficiently obtained.

Two examples of the movable fin 24 and the fixed fin 25 in consideration of the assembly of the members in the third embodiment are shown.
The first example is shown in FIGS. 4 (b) and 4 (c), and the second example is shown in FIGS. 4 (d) and 4 (e).
In the first example, as shown in FIG. 4 (b), stationary fins 25 and a substantially rectangular shape of the pair of fixing plates 25 _1, 25 _2. Fixed plate ₂₅ 1, 25 ₂ is disposed on the inner wall 20A to allow a gap 26 at the inner end side. When a plurality of fixed fins 25 shown in FIG. 4 (a) it is composed both of a pair of fixing plates 25 _1, 25 _2, the gap 26 is continuous in the vertical direction within the cylinder 20.

Then, into the gap 26 between the fixed plate ₂₅ 1, 25 _2, insert the movable fins 24 protruding from the wire 12W radially opposite sides as shown in FIG. 4 (c), 90 ° rotated about the axis of the wire 12W Then, the fins 24 and 25 face each other in the vertical direction and can be assembled so as to overlap each other in a plan view.

In the second example, as shown in FIG. 4 (d), Yes divides the cylinder 20 in the vertical direction along body half 20 _1, 20 _2, the stationary fins 25 along the dividing line L of the cylinder 20 It is divided into fixed plate ₂₅ 1, 25 ₂ semiannular also. _{The wire 12W and the movable fins 24 and the half-split bodies 20 1 and 202 2} were assembled so that the movable fins 24 shown in FIG. 4 (e) and the fixed fins 25 shown in FIG. 4 (d) were staggered. after, halves ₂₀ 1, 20 ₂ may be integrated by welding or the like along the dividing line L. According to this method, the shape of the movable fin 24 does not matter. According to the second example, since the area where the movable fin 24 and the fixed fin 25 overlap can be widened, it is advantageous in increasing the vibration damping.

[Fourth Embodiment]
Next, the vertical movement suppressing device 4 according to the fourth embodiment of the present invention will be described with reference to FIGS. 5A and 5B.
The vertical movement suppressing device 4 of the fourth embodiment is the same as the vertical movement suppressing device 1 (FIG. 2) of the first embodiment, the cylinder 20, the first and second elastic body seals 21 and 22, and the viscous filler. In addition to the 23, the inner cylinder 123 arranged around the axis of the wire 12W inside the cylinder 20, and the ball screw as a conversion mechanism that converts the axial displacement of the shaft member 12 into an axial rotational motion. 28 and bearings 291,292.
The viscous filler 23 is filled between the outer wall 123A of the inner cylinder 123 and the inner wall 20A of the outer cylinder 20 arranged coaxially with the cylinder 20 (outer cylinder).

The shaft member 12 of the present embodiment includes a wire 12W, an inner cylinder 123 rotated around the axis of the wire 12W, a first mounting portion 121, a first bearing 291 provided on the first mounting portion 121, and a ball. It is composed of a screw 28 and a second bearing 292. The ball screw 28 and the second bearing 292 also serve as a second mounting portion to be mounted on the mass 11.

The first bearing 291 rotatably supports the outer peripheral portion of the first mounting portion 121. The shaft member 12 and the cylinder 20 are sealed at the upper end of the cylinder 20 by the first elastic body seal 21 interposed between the outer peripheral portion of the first bearing 291 and the inner wall 20A of the cylinder 20.

The ball screw 28 converts the axial displacement of the wire 12W into an axial rotational motion and transmits it to the inner cylinder 123. The ball screw 28 includes a screw 281 connected to the lower end of the wire 12W and a ball nut 282 to which the screw 281 engages. The ball nut 282 is coupled to the lower end of the inner cylinder 123.
The ball nut 282 is rotatably supported by a second bearing 292. The shaft member 12 and the cylinder 20 are sealed at the lower end of the cylinder 20 by the second elastic body seal 22 interposed between the outer peripheral portion of the second bearing 292 and the inner wall 20A of the cylinder 20.

The ball screw 28 converts the axial displacement of the wire 12W into a rotational motion of a displacement amount larger than the axial displacement amount via the screw 281 and the ball nut 282, and the inner cylinder coupled to the ball nut 282. 123 rotates about the axis. Therefore, in addition to the relative displacement in the vertical direction due to the soft coupling between the inner cylinder 123 and the outer cylinder 20 by the elastic body seals 21 and 22, an amplified relative displacement around the axis also occurs. It becomes. Due to the amplified relative displacement around the axis, the viscous filler 23 filled between the inner cylinder 123 and the outer cylinder 20 is shear-deformed, so that resistance during shear deformation is generated in the viscous filler 23. As a result, sufficient damping is applied to the vibration of the vibration system 100 in the vertical direction.
Therefore, according to the present embodiment, in addition to the damping effect obtained by the first embodiment, the effect of suppressing the vertical movement of the vibration system is more sufficiently suppressed based on the conversion in the rotation direction and the displacement amplification by the ball screw 28. Obtainable.

The vertical movement suppressing device 4 of the fourth embodiment has a conversion mechanism that converts the axial displacement of the shaft member 12 into rotational motion and transmits it to the inner cylinder 123, and the cylinder 20 and the shaft are on the upper end side of the shaft member 12. As long as it has a first elastic body seal 21 mounted between the member 12 and a second elastic body seal 22 mounted between the cylinder 20 and the shaft member 12 on the lower end side of the shaft member 12, the member The arrangement and configuration of the can be changed as appropriate.
For example, the first bearing 291 and the first elastic body seal 21 may be mounted between the outer wall 123A at the upper end of the inner cylinder 123 and the inner wall 20A of the cylinder 20.
Further, contrary to the example shown in FIG. 5, the ball screw 28 and the second bearing 292 can be arranged on the upper end side of the shaft member 12, and the first bearing 291 can be arranged on the lower end side of the shaft member 12. Alternatively, the ball screw 28 and the bearing 292 can be arranged on both the upper and lower ends.
Instead of the ball screw 28, another linear rotation conversion mechanism can be used.

[Fifth Embodiment]
Next, the vertical movement suppressing device 5 according to the fifth embodiment of the present invention will be described with reference to FIGS. 6A and 6B.
The vertical movement suppressing device 5 of the fifth embodiment is different from the first embodiment (FIG. 2) in the mechanism of applying damping to the vibration in the vertical direction. In the fifth embodiment, damping is applied by friction. The vertical movement suppressing device 5 does not include the viscous filling 23.

Similar to the vertical movement suppressing device 1 of the first embodiment, the vertical movement suppressing device 5 of the fifth embodiment is formed of a cylinder 20 arranged around the axis of the shaft member 12 and an elastic material such as rubber. The first and second elastic bodies 21'and 22'are provided. In addition, the vertical movement suppressing device 5 includes a metal brush 31 as a friction applying member provided on the wire 12W. The brush 31 can be configured in an appropriate form, but the brush 31 of the present embodiment is composed of innumerable wires extending radially outward from the wire 12W, and is composed of innumerable wires extending radially outward from the wire 12W in the length direction of the wire 12W. It is continuously provided in. The tip of the brush 31 is in contact with the inner wall 20A of the cylinder 20.

In the fifth embodiment in which the viscous filler 23 is not used, the functions of sealing between the cylinder 20 and the shaft member 12 are not required for the first and second elastic bodies 21'and 22'. It suffices if these first and second elastic bodies 21'and 22' support the cylinder 20 on the shaft member 12. It is also possible to support the cylinder 20 on the shaft member 12 only by the first elastic body 21', in which case the second elastic body 22'is not required.

According to the present embodiment, as in the first embodiment, the shaft member 12 is softly connected to the cylinder 20 by the first and second elastic bodies 21'and 22', so that the shaft member 12 vibrates with the floor 10F of the structure. When the shaft member 12 is pulled or contracted in the vertical direction due to a large displacement due to the proximity of the natural frequency to the system 100, the cylinder 20 tries to stay in place without moving.
At this time, since the brush 31 that is displaced in the axial direction together with the shaft member 12 rubs the inner wall 20A of the cylinder 20, the frictional resistance can provide damping to the vertical movement of the vibration system 100 and the floor 10F.
Therefore, as a harmful effect of installing the vertical movement suppressing device 5 on the floor 10F of the structure, the vertical _{vibration becomes large due to the proximity of the natural frequencies f 0} and f ₁ (FIG. 1) in the vertical direction. Even so, the vertical movement can be sufficiently suppressed.

Similar to the vertical movement suppression device 1 of the first embodiment, the vertical movement suppression device 5 of the fifth embodiment also changes the connection structure between the shaft member 12 and the mass 11 and the connection structure between the shaft member 12 and the frame 13. The structure is such that it can be easily installed on the existing mounting portions 121 and 122, but the vertical movement of the vibration system can be sufficiently suppressed.

The rigidity of the brush 31 in the vertical direction should be appropriately set according to the density, length, wire diameter, etc. of the wire rod of the brush 31 so that sufficient friction can be generated with the inner wall 20A of the cylinder 20. Is preferable. For example, the natural frequency of the brush 31 in the vertical direction may be set to _{the natural frequency f 1} or more in the vertical direction of the vibration system 100 so that the brush 31 surely rubs the inner wall 20A.

The brush 31 may be provided only in a part of the section of the wire 12W in the length direction as long as a sufficient vertical movement suppressing effect sufficient for suppressing the vertical movement of the vibration system can be obtained.

Since the vertical movement suppressing device 5 does not include the viscous filling 23, it is not necessary to check whether the viscous filling has leaked from the first and second elastic bodies 21'and 22'.
If the brush 31 is given appropriate rigidity, the wear of the brush 31 is not so large, and even if the brush 31 is worn, it follows the axial displacement of the wire 12W while contacting the inner wall 20A. The vertical movement suppressing device 5 can be used while maintaining the above.
From the above viewpoint, the vertical movement suppressing device 5 is easy to maintain.
It should be noted that a friction imparting material other than the brush 31 can also be adopted.

[Sixth Embodiment]
Next, the vertical movement suppressing device 6 according to the sixth embodiment of the present invention will be described with reference to FIGS. 7 (a) and 7 (b).
The vertical movement suppressing device 6 of the sixth embodiment includes a viscous body 32 arranged on the inner wall 20A of the cylinder 20 in addition to the components provided by the vertical movement suppressing device 5 (FIG. 6) of the fifth embodiment. ..
The wire rod of the brush 31 pierces the viscous body 32 and is in contact with the inner wall 20A.

The viscous body 32 is made of a viscous material or a viscoelastic material using a polymer compound, and retains its own shape. The viscous body 32 is, for example, a jelly-like sheet installed on the inner wall 20A of the cylinder 20 or a rubber film applied to and solidified on the inner wall 20A.
The effect of imparting damping is higher when the viscous body 32 is provided over the entire length direction of the cylinder 20, but it can also be provided only in a part of the section of the cylinder 20 in the length direction.

Like the vertical movement suppressing device 5 of the fifth embodiment, the vertical movement suppressing device 6 of the sixth embodiment also includes a member having fluidity enough to leak from the first and second elastic bodies 21'and 22'. Since there is no such thing, maintenance is easy.

In the sixth embodiment as well, as in the other embodiments, the cylinder 20 and the shaft member 12 are relatively displaced in the vertical direction as the shaft member 12 expands and contracts due to the use of the first and second elastic bodies 21 and 22. At that time, in addition to the friction between the brush 31 and the inner wall 20A, the absorption of vibration energy can be expected from the resistance of the viscous body 32 at the time of deformation, so that the effect of suppressing the vertical movement of the vibration system can be more sufficiently obtained.

[7th Embodiment]
Next, the vertical movement suppressing device 7 according to the seventh embodiment of the present invention will be described with reference to FIGS. 8A and 8B.
The seventh embodiment is a combination of the fifth embodiment (FIG. 6) and the first embodiment (FIG. 2).
The vertical movement suppressing device 7 of the seventh embodiment includes a viscous filler 23 to be filled inside the cylinder 20 in addition to the components provided by the vertical movement suppressing device 5 (FIG. 6) of the fifth embodiment. .. The viscous filler 23 is the same as that used in the vertical movement suppressing device 1 of the first embodiment.

When the cylinder 20 and the shaft member 12 are relatively displaced in the vertical direction due to the expansion and contraction of the shaft member 12, in addition to the friction between the brush 31 and the inner wall 20A following the shaft member 12, the viscous filling between the cylinder 20 and the wire 12W Vibration energy can be expected to be absorbed from the viscous resistance of the object 23. As the wire 12W expands and contracts, the viscous filler 23 is compressed between the wires of the brush 31, and the damping effect by applying the vertical moving load can also be obtained.

In addition to the above, as long as the gist of the present invention is not deviated, the configurations listed in the above embodiments can be selected or changed to other configurations as appropriate.
The vertical movement suppression devices 1 to 7 of the present invention are also applied to a type of vibration damping device that reduces the vibration response in the horizontal direction by driving the mass 11 with a motor or the like in response to an input of an external force such as vibration. Can be done.
Further, the vertical movement suppressing devices 1 to 7 of the present invention can be applied to other than the vibration damping device in order to reduce the vertical vibration response of the vibration system.

1-7 Vertical movement suppression device 10 Vibration damping device 10F Floor 11 Mass 12 Shaft member 12W Wire 13 Frame 13A Pillar 13B Beam 13C Auxiliary beam 14 Base 20 Cylinder 20A Inner wall 21 1st elastic body Seal 21'1st elastic body 22nd 2 Elastic body seal 22'Second elastic body 23 Viscous filling 24 Movable fin (movable member)
24A outer end 25 fixing fin (fixing member)
26 Gap 28 Ball screw (conversion mechanism)
31 Brush (friction applying member)
32 Viscous body 100 Vibration system 121 1st mounting part 122 2nd mounting part 123 Inner cylinder 123A Outer wall 20 ₁ , _{202 2} Half split body 25 ₁ , 25 ₂ Fixing plate 281 Screw 282 Ball nut 291 First bearing (conversion mechanism)
292 Second bearing (conversion mechanism)
L dividing line f ₀ , f ₁ Natural frequency

Claims (8)

It is a vertical movement suppression device that suppresses vibration in the vertical direction.
A cylinder disposed around the axis of the shaft member extending in the vertical direction,
A first elastic body seal that seals between the cylinder and the shaft member on one side in the axial direction of the shaft member,
A second elastic body seal that seals between the cylinder and the shaft member on the other side of the shaft member in the axial direction.
A viscous filler made of a viscous material or a viscoelastic material and filled inside the cylinder ,
One or more movable members that project radially outward from the shaft member and are supported by the shaft member so as to be vertically movable inside the cylinder as the shaft member is displaced in the axial direction.
It is provided with one or more fixing members which are installed on the inner wall of the cylinder, project inward in the radial direction, and can compress the viscous filler between the movable member and the movable member.
When the vertical movement suppressing device is viewed in a plan view from the vertical direction, the movable member and the fixing member overlap each other.
A vertical movement suppression device characterized by this. The shaft member includes a wire and a first mounting portion and a second mounting portion, both of which are coupled around the axis of the wire.
The first elastic body seal seals between the cylinder and the first mounting portion.
The second elastic body seal seals between the cylinder and the second mounting portion.
The vertical movement suppressing device according to claim 1. A cylinder arranged around the axis of a shaft member extending in the vertical direction,
An elastic body that supports the cylinder on the shaft member,
A friction-imparting material provided on the shaft member and in contact with the inner wall of the cylinder is provided .
The shaft member comprises a wire and a mounting portion coupled around the shaft of the wire.
The elastic body is mounted between the cylinder and the mounting portion.
A vertical movement suppression device characterized by this. The friction-imparting material is a brush.
The vertical movement suppressing device according to claim 3. Further comprising a viscous body made of a viscous material or a viscoelastic material and arranged on the inner wall of the cylinder.
The vertical movement suppressing device according to claim 3 or 4. A viscous filler made of a viscous material or a viscoelastic material and filled inside the cylinder ,
Both include a first elastic body seal and a second elastic body seal as the elastic body.
The first elastic body seal seals between the cylinder and the shaft member on the upper side of the cylinder.
The second elastic body seal seals between the cylinder and the shaft member on the lower side of the cylinder.
The vertical movement suppressing device according to claim 3 or 4. With trout
The shaft member that suspends the mass and
A frame that supports the shaft member and
The vertical movement suppressing device according to any one of claims 1 to 6 provided on the shaft member.
To prepare
A vibration damping device characterized by this. The shaft member includes a wire and a first mounting portion and a second mounting portion, both of which are coupled around the axis of the wire.
The first mounting portion is coupled to the frame and
The second mounting portion is coupled to the mass.
The vibration damping device according to claim 7.

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