JPH10184786A - Damping piece and damping device therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damping device which can attain a large damping effect with a simple and small structure. SOLUTION: This damping piece consists of the first and second jointing members 10, 20 which are connected to each other so as to joint a section between two points (objects) L1, L2 which displace relatively to each other. In both the members 10, 20, one end part of them is fixed at one of the two points L1, L2 respectively. In one jointing member 10, its connecting side is formed into a guide screw part 10a, and a rotating piece (integrally-rotating part) 16 which is driven by a guide nut 14 screwed in through a ball bearing 12 is fitted above the guide screw part 10a so as to be capable of rotating and sliding. In the other jointing member 20, its connecting side is formed into a casing 24 for a chamber 22 which stores the rotating piece 16, and the chamber 22 is filled with a viscous body 26 for damping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping piece (a damping mechanism) having a simple structure, a small size, and a large damping effect, and a damping device using the damping piece.

[0002]

2. Description of the Related Art In general, a damping mechanism is mounted between two points (objects) which are relatively displaced, and converts vibration energy transmitted from one vibration source side to the other vibration damping object side into heat energy and disappears. To achieve the damping effect.

However, a general damping mechanism has a damping effect through viscous frictional resistance by accommodating a relative displacement portion generated by vibration in a viscous chamber formed in the apparatus. In this case, the displacement amount of the relative displacement portion is amplified through an amplifying means from the actual displacement amount (displacement amount between two relatively displaced points). . Therefore, the damping effect can also be increased. By the way, the damping effect is
It is proportional to the first power of the facing area between the two parts that perform relative displacement (movement) and the α power of the relative speed.

[0004]

However, the conventional damping mechanism described above still has the following drawbacks.

That is, as described above, the conventional damping mechanism generally has a means for amplifying a relative displacement portion. However, the displacement amplifying means usually includes a hinge / amplifier.
It consisted of lever means connected by a joint.
However, such a hinge lever means has a disadvantage that the amplification magnification (the ratio of the increase in the facing area between the relative displacements and the relative speed) is not sufficient, and the structure is complicated, the structure is enlarged, and the operation accuracy is reduced. Had.

Accordingly, an object of the present invention is to provide a displacement amplifying means capable of achieving a large amplification factor with a simple and compact structure, that is, an attenuation device capable of achieving a large damping effect with a simple and small structure. Is to do.

[0007]

In order to achieve the above object, a first damping device according to the present invention comprises first and second connecting members connected to each other so as to be relatively displaceable. The first connecting member engages with the first rod having a guide screw portion formed on the connection side thereof, and rotates and slides on the guide screw portion based on a relative displacement between the first screw and the guide screw portion. And a disk-shaped rotary body having a diameter sufficiently larger than that of the first rod and rotatably slidably inserted through the guide nut. The connecting member includes a second rod and a cylindrical casing that houses the rotating body and the guide nut formed on the connection side thereof, and a damping member is provided in a gap between the inner wall of the cylindrical casing and the rotating body. Fill viscous and / or viscoelastic material It is characterized in.

In this case, preferably, the rotating body is integrally formed so as to extend radially outward from the outer peripheral portion of the guide nut. Alternatively, the guide nut is provided at a position axially separated from the guide nut, and is formed to engage with one side of the guide nut.

Further, when the damping device according to the present invention is applied to a structure or the like, for example, between a corner portion of a structural frame in a building structure, or a casting including a concrete precast member. It may be arranged between precast members and / or cast-in structures in a structure, or between a foundation and a seismic isolation structure on this foundation, respectively.

In this case, along the outermost vertical pillar of the building having a plurality of floors, the floors are arranged so as to connect the floors through a precast steel material extending over the floors.

Further, the second damping device according to the present invention comprises a first and a second connecting member which are connected to each other so as to be relatively displaceable, and the first connecting member has a guide screw portion on its connection side. Is formed, and is engaged with the guide screw portion and has a diameter sufficiently larger than the internal tube, and is slidably inserted on the guide screw portion based on a relative displacement with the guide screw portion. Disk-shaped rotating body, and the second
Is composed of an outer tube and a cylindrical casing formed on the connection side thereof and accommodating the rotating body, and a damping viscous body and / or a damping member are provided in a gap between the inner wall of the cylindrical casing and the rotating body. Alternatively, a viscoelastic body is filled.

In this case, preferably, the rotating body comprises a disk-shaped main body, and a flange extending radially outward from an outer peripheral portion of the disk-shaped main body and formed thinner than the disk-shaped main body.

[0013] Further, along the outermost vertical pillar of the building having a plurality of floors, the floors are arranged so as to connect the floors through a precast steel material extending over the floors.

[0014]

In the first damping device according to the present invention, the displacement amplifying means is formed of a rotating body, that is, a rotating piece driven (rotated and slid) by a guide nut screwed into a guide screw portion of the first connecting member. Have been. Therefore, the relative speed increase ratio N of the displacement amplifying means is represented by the following equation: N = 2πr / p, where p is the thread pitch of the guide screw portion and the nut r is the representative radius of the rotating piece, and p and r are appropriate. By setting the value, the size can be appropriately selected. That is, if p and r are set to, for example, 2 and 5 cm, N is amplified 15.7 times. In this case, when the attenuation frame is used for bracing, the N becomes 2
It is amplified by a factor of 2.2. Similarly, the above-described facing area A can also be appropriately set to a sufficient size by setting r to an appropriate value. The damping effect of the damping piece achieved by these will be described in more detail in the embodiments described later. Moreover, since the displacement amplifying means is a screw-nut mechanism, it can be configured simply and compactly.

Further, the attenuating device using the second attenuating piece according to the present invention has a simple and small size and has a sufficient attenuating effect similarly to the first attenuating piece due to its excellent characteristics. Can be demonstrated.

As described above, according to the first and second damping devices according to the present invention, it is possible to easily achieve a large damping effect with a simple and compact structure.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a damping piece according to an embodiment of the present invention.

In FIG. 1, the attenuation coma according to the present invention is:
First, basically, two points (objects) L1 and L2 that are relatively displaced.
The first and second connecting members are connected to each other so as to connect them, that is, the first rod 10 and the tubular second rod 20. And these rods 10, 2
0 fixes each one end to one of the two points L1 and L2. The first rod 10 has a connection side formed on a guide screw portion 10a, on which a rotary piece 16 driven by a guide nut 14 screwed via a ball bearing 12 is rotated. Insert movably. Also, the second rod 20 forms a casing 24 on the connection side thereof, which defines a chamber 22 for accommodating the rotary piece 16, and a viscous material and / or a viscoelastic material 26 for damping is formed in the chamber 22. Fill.

The guide nut 14 is provided with ball bearings 28 and 30 on the upper and lower opposite surfaces of the casing 24 surrounding the guide nut 14, respectively.
In accordance with both compressive and tensile loads generated from the relative displacement between the two points L1 and L2, the shaft is supported so as to rotate on the guide screw portion 10a and slide vertically in the drawing. The rotating piece 16 is formed of an integral rotating portion 16 extending radially outward from the outer peripheral portion of the guide nut 14. Further, other synthetic rubbers such as polyisobutylene can be suitably used as the viscous fluid.

Hereinafter, the damping effect of the damping device of the present invention will be described in detail.

First, the damping piece 50 is transferred to the base 7
In a schematic explanatory view (FIG. 17) arranged so as to support the building structure 70 on the upper part 1, the dominant (basic) frequency of the building structure n (Hz) The axial deformation (maximum) of the damping (damping) piece 50 d (cm) Screw pitch of the guide screw portion and the nut 52 p (cm) Rotation within the half-amplitude time Δt (=＝ n) m = d / p Number of rotations of the rotary piece 56 (1 second) f = 2dn / p area of the rotating frame 56 with a diameter (radius) D (radius R = D / 2) rotation frame 56: _upper surface ^{a = π (D 2 -D0 2} ) / 4: lower surface a _under = [pi] D ^2/4: total (although , when the ^{ignore) a = πD 2/2 D0} , the angular velocity of the rotation frame 56 ω (rad / sec) is the following formula (1) ω = 2πf = 4πdn / p (1), also of the rotating frame 56 Representative speed v (m / sec)
In this case, v = 2πfr = 4πdnr / p (where r is a representative radius). Here, assuming that r = ２R (= D / 3), the following equation (2) v = 4πdnD / 3p (2).

However, in such an attenuation frame,
Generally, the damping force Qd (kg) of the viscous body is expressed by the following equation (3) Qd = a · μ · (dv / dy) ^α · A (3) where a: coefficient μ: viscosity of the viscous body (kg · sec / cm ² ) dv: Velocity difference between two surfaces (inner surface of chamber 54 and surface of rotary member 56) dy: Gap (cm) between two surfaces (inner surface of chamber 54 and surface of rotary member 56) A: Two surfaces (chamber 54) below since given by the inner surface and the rotating frame 56 surface) opposing area between (cm ^2), thus the unit gap (1 cm) per damping force obtained by substituting the equation in equation (3) (2) is calculated from equation (4) Qd = a · μ · A · (4πdnD / 3p) α · πD 2/2 (4).

However, here, as an experimental result,
Value a: 0.0843 (μ30)^-0.483(However, μ30 is warm
Viscosity of viscous body at 30 ° C.) μ: 7.1 (μ30)^0.88・ E^-0.07t(However, t is temperature
Degree) α: 0.94 is obtained, that is, as a simplified relational expression,
Notation (5) Qd = 0.6f^{{-1.17 (μ30) 0.3}}・ (Μ30)^0.4 × e^-0.07t・ A ・ (v / dy)^0.94 (5) is obtained. From the above equations (1) and (2), A = πD^Two/ 2 v = 4πdnD / 3p, so now suppose that n = 1.0 Hz d = 5 cm p = 0.5 cm D = 40 cm dy = 1 cm, that is, f = 2dn / p = 2.5 · 1/0. 5 = 20 (rps) A = πD^Two/ 2 = about 2500 (cm^Two)  v = 4πdnD / 3p = 4π5 · 1 · 40/3 · 0.5
= 1670 (cm / sec) Use viscous material μ30 = 100 poise = 1 / 9.8 x 10^Three(Kg · sec /
cm^Two), The damping force Qd is given by the following equation (5).
It can be calculated as follows.

Qd = 0.6 × 20 ^{{−1.17 × (1/9800) 0.3}} × (1 / 9.8 × 10 ³ ) ^0.4 × e− ^{0.07 × 20} · A · (v / dy) ^0.94 = 0 0.6 × 0.8 × 0.0253 × 0.2466 × 2500 × (1670) ^0.94 = 8010 (kg) That is, according to such a damping piece, a small flat rotating piece 56 having a diameter of 40 cm is used. It can be seen that a large damping force of 8 tons can be obtained.

As described above, according to the damping piece according to the present invention, the linear displacement of the screw portion is converted into the rotary motion of the rotary piece in a simple and small-sized structure, particularly reduced in the longitudinal direction. Very large damping effects can easily be achieved in comparison with other types of devices. Furthermore, this damping piece has the advantages of being applied equally to relatively large structures and small assemblies, as well as to both compressive and tensile loads.

Incidentally, the attenuating piece of the present invention can be variously changed. For example, it can be modified as shown in FIG. In a first modification, as shown in FIG. 2, the first connecting member is changed from the tubular rod 20 to a normal rod 40,
A separate rotating part 4 which separates the rotating piece from the integral rotating part 16 from one side of the guide nut 14 and extends in parallel in the radial direction.
The configuration is changed to 2. That is, the separate rotating portion 42 is housed in the chamber 22 in the first casing 42 formed on the connection side of the rod 40 (second connecting member), and the guide nut 14 is
Are supported by ball bearings 28 and 30. It is apparent that the same operation and effect as in the previous embodiment can be achieved in this modified example.

A further modification, as shown in FIG. 3, consists of a first and a second connecting member connected to each other so as to be relatively displaceable, and the first connecting member has a guide screw portion 102 on the connection side. Is formed so as to engage with the screw portion and have a diameter sufficiently larger than that of the internal tube 100 so as to be rotatable and slidable on the guide screw portion based on the relative displacement with the screw portion 102. And a disk-shaped rotating body to be worn. The rotator 104 includes a disk-shaped main body 104a, and a flange 104b extending radially outward from the outer periphery of the disk-shaped main body 104a and formed thinner than the disk-shaped main body 104a. The second connecting member includes:
The outer pipe 110 and the rotating body 1 formed on the connection side thereof
And a cylindrical casing 112 accommodating the same.
Further, the rotating body 104 has a substantially cylindrical casing 11.
2 is rotatably slidably supported via a plurality of ball bearings 116. The gap between the inner wall of the cylindrical casing 112 and the rotating body 104 is filled with a damping viscous body and / or a viscoelastic body 114. It is obvious that the same operation and effect as in the previous embodiment can be achieved in this modified example.

Further, as described above, since the damping piece of the present invention is widely applied to both large structures and small assemblies, the entire structure is appropriately configured according to the application. That is, in the damping piece 50 shown in FIG. 4, one connecting member 50b is configured as the longitudinal connecting member 50b. In the damping piece 50 shown in FIG. 5, an extension member 50c is connected to one connecting member 50b. In the damping piece 50 shown in FIG. 6, one connecting member 50a is configured to be held, for example, by the inserting connecting member 50a, and the other connecting member 50b is, for example, held rotatably in the holding portion d.

Next, of the present invention having such a configuration,
An embodiment of a damping device using a damping piece, particularly an embodiment applied to a building structure, will be described in detail below.

First, in FIG. 7, the attenuation frame 50 shown in FIG. 4 is used. This damping piece 50 is used for the building structure 7.
0 mounting plate 72 at the opposite corner of the structural frame 72
a and 72b are arranged via connecting members 50a and 50b and extension members 50c so as to be compressible and tensile. Therefore, according to this, the damping piece 50 expanded and contracted by the strain displacement of the structural frame 74 generated by an earthquake or the like.
By absorbing the distortion energy in the structural frame 74 through the damping effect of the above, the vibration of the building structure 70 can be effectively damped.

Next, referring to FIG.
In a casting structure including a concrete precast member, each part 70a, 70b, 70c, 70d (which will be respectively described later) between the precast member and / or the casting structure is compressively and tensilely distributable. Has been established.

That is, in FIGS. 11 and 12 relating to the portion 70a, the damping piece 50 is provided with a filler 78 between the precast column member 74 and the precast beam member 76.
The end portions of the insertion connecting members 50a and 50b (at least one of which 50b is loosely fitted) are respectively disposed in the inner surfaces of the two members 50a and 50b. Is engaged with the nut. Therefore, according to this, the relative displacement energy between the two members 50a and 50b is absorbed by the damping effect of the damping piece 50 expanded and contracted by the relative displacement between the two members 50a and 50b generated by an earthquake or the like, and the building structure The vibration of the object 70 is effectively damped.

In FIG. 13 relating to the portion 70b, the attenuating piece 50 shown in FIG. 5 is used. The damping piece 50 is disposed between the precast column member 74 and the cast floor structure 80, and one connecting member 50a is embedded in the column member 74 and the other connecting member 50b is connected to the holding portion 50d.
Is rotatably restrained with respect to the floor structure 80 via the. Therefore, the column member 74 and the floor structure 80 generated by an earthquake or the like.
The relative displacement energy between the column member 74 and the floor structure 80 is absorbed by the relative displacement between the pillar members 74 and the floor structure 80 due to the damping effect of the damping piece 50 expanded and contracted by extension and restoration, and the vibration of the building structure 70 is effectively damped. You.

In FIG. 14 relating to the portion 70c, the damping piece 50 is connected to both the precast connecting members 50.
b and 50a are fixed in the casting floor structure 80 via the holding portion 50d, and one of the connecting members 50
The leading end of a is a support portion 82 and both support rods 84a, 84b.
Through a predetermined portion (not shown) of the floor structure 80. Therefore, according to this, the relative displacement energy between the floor structures 80 is absorbed by the damping effect of the damping piece 50 which is expanded and contracted by the relative displacement in the floor structure 80 itself generated by an earthquake or the like, and the building structure 70 Vibration is effectively damped.

In FIG. 15 relating to the portion 70d, the damping piece 50 is disposed between the foundation 86 and the cast floor structure 80 via a holding portion 50d provided on the building structure foundation 86. , Both connecting members 50b, 50a
Are connected to both predetermined positions L1 and L2 in the floor structure 80. Accordingly, due to the damping effect of the damping piece 50 expanded and contracted by the horizontal relative displacement between the foundation 86 and the floor structure 80 generated by an earthquake or the like, the foundation 86 and the floor structure 80 are reduced.
The relative displacement energy in the horizontal direction is absorbed, and the vibration of the building structure 70 is effectively damped.

Next, in FIG.
Is a base 86 and seismic isolation pads 88, 88 on the base 86.
Are provided so as to be able to be compressed and pulled through respective support columns 86a and 90a between the base and the seismic isolation structure 90 which is supported through the base. Thus, according to this:
Due to the damping effect of the damping piece 50 expanded and contracted by the horizontal relative displacement between the foundation 86 and the seismic proof structure 90 generated by an earthquake or the like, the horizontal relative displacement energy between the base 86 and the seismic proof structure 90 is absorbed. Thus, the vibration of the seismic isolation structure 90 is effectively damped.

Next, as shown in FIG. 18, the damping coma can be used in a damping construction method for bending deformation 64 of a high-rise or high-rise building. For a high-rise building 62 or a skyscraper, the problem of bending deformation is more important than shearing deformation. To suppress this bending deformation, it is necessary to improve the bending deformation damping performance of a column member extending in the vertical direction of the building. There is. However, it is difficult to suppress minute vertical fluctuations. For this reason, it is necessary to increase the minute vertical fluctuation to suppress bending deformation. For example, as shown in FIG. 18, by connecting a thin member such as a precast (PC) steel wire 60 or a PC steel to a thin member such as a precast (PC) steel wire through a damping piece 50 according to the present invention, a minute vertical Variation itself can be increased, and bending deformation can be suppressed. When a thin member such as the PC steel wire 60 is used as the connecting member, it works more effectively against tension.

The above device is preferably disposed near the outermost vertical column of the building, and can be provided inside the building, outside the building, or inside the column. The above device may be provided to connect a few floors separated from each other, or may be provided to connect between the top floor and the ground depending on the structure of the building.

As described above, according to the attenuating device of the present invention, as described above, the attenuating piece is simply and small-sized and has a sufficient attenuating effect.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited to the above-described embodiments, and many modifications and changes can be made without departing from the spirit of the present invention. For example, the ball bearings in the device can be appropriately changed to another bearing means.

[0041]

As described above, the damping piece according to the present invention comprises the first and second connecting members which are connected to each other so as to connect between two points which are relatively displaced. , One end of each of which is one of the two points
The first connecting member has a connection side formed on a guide screw portion, and a rotary piece is rotatably slidably mounted on the screw portion via a guide nut.
Since the connecting member is formed such that its connection side is formed in a casing for a chamber accommodating the rotating piece and the chamber is filled with a damping viscous and / or viscoelastic material, in other words, Since the damping mechanism is configured to convert the linear displacement of the screw into the rotational motion of the rotary piece, the displacement conversion magnification (relative speed increase ratio, etc.) is larger than that of this type of conventional device. Be increased. Therefore, according to the damping device of the present invention, it is possible to easily achieve a large damping effect with a simple and small configuration.

The damping device according to the present invention has a simple and compact damping piece as described above and has a sufficient damping effect. With this configuration, a sufficient damping effect can be exhibited.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an attenuation device having an attenuation piece according to the present invention.

FIG. 2 is a cross-sectional view showing a first modified example of the attenuation device having the attenuation piece according to the present invention.

FIG. 3 is a sectional view showing a second modified example of the attenuation device having the attenuation piece according to the present invention.

FIG. 4 is a side view showing a configuration example of an attenuation device having an attenuation piece according to the present invention.

FIG. 5 is a side view showing another example of the configuration of the attenuation device having the attenuation piece according to the present invention.

FIG. 6 is a side view showing still another configuration example of the attenuation device having the attenuation piece according to the present invention.

FIG. 7 is an overall sectional view of the building structure to which the damping device according to the present invention is applied between opposing corners of the structural frame in the building structure.

FIG. 8 is an enlarged view of a portion A in FIG. 7;

FIG. 9 is an enlarged view of a portion B in FIG. 7;

FIG. 10 is an overall cross-sectional view of the casting structure in which the damping device according to the present invention is applied to each application site 70a, 70b, 70c, 70d between a concrete precast member and / or a casting structure.

FIG. 11 is a perspective view showing an embodiment of an attenuation device using an attenuation piece applied to the portion 70a shown in FIG.

FIG. 12 is a sectional view taken along the line VII-VII in FIG. 11;

13 is a cross-sectional view showing one embodiment of an attenuation device using an attenuation piece applied to the portion 70b shown in FIG.

14 is a cross-sectional view showing one embodiment of an attenuation device using an attenuation piece applied to a portion 70c shown in FIG.

FIG. 15 is a cross-sectional view showing one embodiment of an attenuation device using an attenuation piece applied to a portion 70d shown in FIG.

FIG. 16 is an overall sectional view of the foundation and the earthquake-proof structure showing one embodiment of the damping device according to the present invention applied between the foundation and the earthquake-proof structure on the foundation.

FIG. 17 is a schematic explanatory view in which the damping piece according to the present invention is arranged on a foundation to support a building structure.

FIG. 18 is a schematic explanatory view in which damping pieces according to the present invention are arranged so as to suppress bending deformation of a high-rise building structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st connection member 10a Guide screw part (ball screw) 12 ball bearing 14 Guide nut 16 Rotating piece (integral rotation part) 20 2nd connection member 22 Chamber 24 Casing 26 Viscous body 28, 30 Ball bearing 40 Second Connecting member 42 Rotating piece (separate rotating part) 44, 46 Casing 50 Damping piece 50a, 50b Connecting member 50c Extension member 50d Holding part 60 Precast steel 62 High-rise building 70 Building structure 72 Structural frame 74 Precast column member 76 Precast beam Member 78 Filling material 80 Casting floor structure 86 Foundation 88 Seismic isolation pad 90 Seismic isolation structure 100 Inner pipe 102 Guide screw part 104 Rotating body 104a Disk-shaped main body 104b Collar part 112 Cylindrical casing 114 Viscous body and / or viscoelastic body 116 Ball beary Ning

Claims (14)

[Claims] 1. A vehicle comprising a first and a second connecting member connected to each other so as to be relatively displaceable, the first connecting member comprising:
A first rod having a guide screw portion formed on its connection side,
A guide nut engaged with the guide screw portion and rotatably slidable on the guide screw portion based on relative displacement with the guide screw portion; and a guide nut having a diameter sufficiently larger than the first rod. A disk-shaped rotator inserted rotatably and slidably via a guide nut, wherein the second connecting member is
In a damping device including a second rod and a cylindrical casing that houses the rotating body and a guide nut formed on a connection side thereof, a damping viscosity is formed in a gap between an inner wall of the cylindrical casing and the rotating body. A damping device characterized by filling a body and / or a viscoelastic body. 2. The damping device according to claim 1, wherein the rotating body is integrally formed so as to extend radially outward from an outer peripheral portion of the guide nut. 3. The damping device according to claim 1, wherein the rotating body is provided at a position axially separated from the guide nut, and is formed to engage with one side of the guide nut. 4. The damping device according to claim 1, wherein the damping device is arranged between the opposite corners of the structural frame in the building structure so as to be compressible and tensile. 5. The damping device according to claim 1, wherein the damping device is disposed between the precast member and / or the cast structure in the cast structure including the concrete precast member so as to be capable of being compressed and pulled. 6. The damping device according to claim 5, which is disposed between the precast column member and the precast beam member. 7. The damping device according to claim 5, wherein the damping device is disposed between the precast column member and the cast floor structure. 8. The damping device according to claim 5, wherein the damping device is disposed in a cast floor structure. 9. The damping device according to claim 5, wherein the damping device is disposed between a building structure foundation and a cast floor structure. 10. The damping device according to claim 5, wherein the damping device is disposed between the foundation and the seismic isolation structure on the foundation so as to be compressible and tensionable. 11. The damping device according to claim 1, wherein the damping device is arranged along the outermost vertical pillar of the multi-story building so as to connect the isolated floors via a precast steel material extending over the isolated floors. 12. A first member connected to each other so as to be relatively displaceable.
And a second connecting member. The first connecting member has an inner tube having a guide screw portion formed on a connection side thereof, and has a sufficiently large diameter which engages with the guide screw portion and is larger than the inner tube. A substantially disk-shaped rotating body which is rotatably slidably inserted on the guide screw portion based on the relative displacement with respect to the screw portion, wherein the second connecting member includes an outer pipe and a connection side thereof. A damping device comprising a cylindrical casing for accommodating the rotating body formed on the rotating body, wherein a gap between an inner wall of the cylindrical casing and the rotating body is filled with a damping viscous body and / or a viscoelastic body. Characteristic damping device. 13. The damping device according to claim 11, wherein the rotating body comprises a disk-shaped main body and a flange extending radially outward from an outer peripheral portion of the disk-shaped main body and formed thinner than the disk-shaped main body. apparatus. 14. The damping device according to claim 12, wherein the damping device is arranged along the outermost vertical pillar of the multi-story building to connect the isolated floors via a precast steel material extending over the isolated floors.