JP2001107600A - Vibration damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent collapse of a building by mounting a vibration damping device between the beams and floors of the building for absorbing the energy of shaking of the building produced by an earthquake. SOLUTION: A movable stand 1 has a column fixing part 2 and a spherical projecting part 3. A fixed stand 4 has a recess 5 for accommodating the spherical projecting part 3 of the movable stand 1. A vibration damping material 6 fills a gap between the spherical projecting part 3 and the recess 5. A column 7 is fixed to the column fixing part 2 of the movable stand 1 at one end. A limiter member 8 is integrated with the movable stand 1 so that when the vibration damping material 6 is deformed at the application of load, the limiting member 8 collides against a portion of the fixed stand 4 to limit the amounts of inclination and settling of the movable stand 1. The area occupied by this vibration damping device is small and the device has a stable energy absorption capability for shaking in every direction as well as for large deformations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device used for seismic isolation of buildings.

[0002]

2. Description of the Related Art Various earthquake-resistant structures are used in newly-built buildings, condominiums, towers, and the like to prevent earthquakes. In addition, additional construction work for providing an earthquake-resistant structure to existing buildings has been widely promoted. When the building shakes greatly during an earthquake and the roll is amplified by resonance or the like, the danger of furniture falling or the building itself falling is increased. Therefore, in particular, a vibration damping device is used to absorb the energy of the roll.

FIGS. 2A and 2B are diagrams for explaining the operation of a conventional vibration damping device. FIG. 2A is a side view of a main part of the vibration damping device in a state where no rolling occurs, and FIG. FIG. 9C is a side view of a main part of another type of vibration damping device in a state where there is no roll, and FIG. 10B is a side view of a main part of another type of vibration damper at the time of maximum roll.

[0004] The vibration damping device shown in FIG.
27, 29, 31 and thin rubber layers 26, 28, 30 are laminated. If the steel plates 25, 27, 29, 31 and the rubber layers 26, 28, 30 are formed in a disk shape when viewed from above, the vibration damping device is deformed in the same state in any direction as viewed in the horizontal direction, and the vibration is reduced. Shows the damping effect. (B) of the figure shows the state after deformation as viewed from the side. This vibration damping device is sandwiched between the foundation of the building and the building main body, and has a function of making it difficult to transmit the horizontal shaking due to the earthquake, that is, the horizontal shaking of the ground to the building main body. Furthermore, when the building body rolls, the energy is absorbed and the vibration is attenuated. The seismic isolation device is responsible for absorbing the roll due to the earthquake, and the vibration damping device is responsible for the role of damping the generated roll.

The amount H of deformation of the vibration damping device in the horizontal direction is obtained by multiplying the sum of the thicknesses of all the rubber layers 26, 28 and 30 by the allowable shear strain of the rubber.
This device has the above-described vibration damping function against a roll with a width of the deformable amount H in the horizontal direction. The horizontally deformable amount of the device increases as the total thickness of the rubber layers 26, 28, 30 increases. Generally, the allowable shear strain of rubber is about 200 percent. The vertical stiffness is proportional to the area of the rubber layer when the device is viewed from above. On the other hand, the horizontal rigidity is the rubber layers 26, 28,
The larger the sum of the thicknesses of 30 is, the smaller the total thickness becomes.

Another type of vibration damping device shown in FIG. 1C also includes steel plates 32, 35, 33, 36 and thin rubber layers 38, 3.
9 and 40 are laminated. However, steel plate 3
2 and the steel plate 33 are integrated by a link 34, and the steel plate 3
5 and a steel plate 36 are integrated by a link 37.
Therefore, as shown in FIG.
The relative movement between 3 and the steel plates 35, 36 is absorbed by the deformation of the rubber layers 38, 39, 40 therebetween.

The vibration damping device having this structure has a vibration damping effect with respect to deformation in only one direction, as apparent from the drawing. The horizontal deformable amount H of this device is the product of the thickness of one rubber layer and the allowable shear strain of rubber. This is smaller than the vibration damping device of (a). On the other hand, this device is integrated with links 34 and 37, respectively.
The group of steel plates 32 and 33 and the steel plates 35 and 36 increase the rigidity in the vertical direction. That is, the effective area of the rubber layer is the product of the area of the rubber layer and the number of rubber layers when the device is viewed from above. Therefore, as compared with the vibration damping device of FIG.

[0008]

However, the above-mentioned prior art has the following problems to be solved. The vibration damping device as shown in FIG. 2A can expect a vibration damping effect in response to a relatively large deformation in the horizontal direction. However, in order to increase the rigidity in the horizontal and vertical directions, the area of the device must be increased, which leads to an increase in the size of the entire device. On the other hand, the vibration damping device as shown in FIG. 2C has high rigidity in the horizontal and vertical directions, but cannot make the deformable amount too large. Further, since the deformable direction is specified, the method of use and the place of use are limited.

That is, it is preferable that this type of vibration damping device maintain the horizontal rigidity and the vertical rigidity at a certain level and reduce the installation space as much as possible in order to adjust the vibration damping effect. Further, it is preferable to provide a sufficient deformable amount in order to attenuate large roll vibration. Further, it is preferable that the device be as robust and inexpensive as possible with no directionality. A universal joint-shaped vibration damping device which is small and has no directionality and can be easily mounted between pillars has also been developed (Japanese Patent Laid-Open No. 6-49924). There is room for improvement.

[0010]

The present invention employs the following structure to solve the above problems. <Structure 1> A movable base having a column fixing part and a spherical convex part, a fixed base having a concave part for accommodating the spherical convex part of the movable base, a spherical convex part of the movable base and the fixing A vibration damping material that fills a gap between the concave portion of the table and a column having one end fixed to a column fixing portion of the movable table is integrated with the movable table, and a load is applied to the movable table. And a limiter member that collides with a part of the fixed base when the vibration damping material is deformed to limit the movement of the movable base.

<Structure 2> In the vibration damping device according to Structure 1, the limiter member collides with an upper portion of the fixed table when a load is applied to the movable table and the movable table is tilted.
A vibration damping device for preventing the support from swinging above a certain level.

<Structure 3> In the vibration damping device described in Structure 1, the limiter member includes a spherical convex portion of the movable table, a concave portion of the fixed table, and a load applied to the movable table to compress the vibration damping material. When the gap between them becomes minimum, it collides with the upper part of the fixed base to maintain the compressed thickness of the vibration damping material at a predetermined value or more.

<Structure 4> In the vibration damping device according to Structure 1, the limiter member includes a spherical convex portion of the movable table and a concave portion of the fixed table, when a load is applied to the movable table to compress the vibration damping material. A vibration damping device, which collides with the upper portion of the fixed base when the gap between them becomes minimum, thereby completely preventing the swing of the support column.

<Structure 5> The vibration damping device according to any one of structures 1 to 3, wherein the vibration damping material is made of viscoelastic rubber.

<Structure 6> In the vibration damping device according to Structure 1, the vibration damping material is a plurality of spherical elastic bodies sandwiched in a gap between the spherical projection of the movable base and the recess of the fixed base. A vibration damping device comprising:

<Structure 7> In the vibration damping device according to Structure 1, the vibration damping material is made of a viscous fluid, and a bearing made of an incompressible material is sandwiched in the viscous fluid. Vibration damping device.

<Structure 8> In the vibration damping device according to Structure 1, the fixing base is disposed substantially horizontally so that the opening of the concave portion faces upward, the vibration damping material is made of a viscous fluid, and the opening of the concave portion is formed. A stretchable lid is provided so as to close the gap between the spherical protrusion of the movable base and the recess of the fixed base in the vicinity, and at least the bottom of the recess is provided in the viscous fluid. A vibration damping device, wherein a bearing made of a compressible material is sandwiched.

<Structure 9> In the vibration damping device according to the structure 7 or 8, the surface of the movable base, which is in contact with one or both of the spherical projections and the recesses of the fixed base, is provided with irregularities. Is formed. A movable base having a column fixing part and a spherical convex part,
A fixed base having a concave part for accommodating the spherical convex part of the movable base, a vibration damping material that fills a gap between the spherical convex part of the movable base and the concave part of the fixed base, A column having one end fixed to the column fixing portion, the column is integrated with the movable table, and when a load is applied to the movable table and the vibration damping material is deformed, the column collides with a part of the fixed table. A vibration damping device comprising: a limiter member for restricting a movement of a movable base.

<Structure 10> A movable base having a column fixing part and a columnar convex part, a fixed base having a concave part for accommodating the cylindrical side convex part of the movable table, and a cylindrical side surface of the movable table A vibration attenuating material that fills a gap between the convex part and the concave part of the fixed base, and a support having one end fixed to a support fixed part of the movable base. A vibration damping device, comprising: a limiter member that limits a movement of the movable table by colliding with a part of the fixed table when a load is applied to deform the vibration damping material.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below using specific examples.

<Embodiment 1> FIGS. 1A and 1B show an embodiment of a vibration damping device according to the present invention, wherein FIG. 1A is a top view and FIG. 1B is a longitudinal sectional view taken along line AA. As shown in FIG.
This vibration damping device has a disk shape when viewed from above. The movable table 1 in FIG. 1B has a column fixing part 2 and a spherical convex part 3. The fixed base 4 is a spherical projection 3 of the movable base 1.
Has a recess 5 for accommodating the same. The vibration damping material 6 fills a gap between the spherical convex portion 3 and the concave portion 5. Post fixing part 2
(A), a disk-shaped table is formed, and a column 7 is disposed at the center of the table. The column 7 has one end fixed to the column fixing portion 2 of the movable base 1 by, for example, welding or bolting (not shown).

The limiter member 8 is integrated with the movable base 1. Here, the limiter member 8 is formed in a flange shape extending the upper surface of the movable base 1. As described later, the limiter member 8 collides with the upper part of the fixed base 4 when the load is applied to the movable base 1 via the column 7 and the vibration damping material 6 is deformed. And the ability to limit the amount of settlement.

The movable table 1, the fixed table 4 and the columns 7 are made of, for example, a steel or hard plastic molded product. The vibration damping member 6 is made of a viscoelastic rubber material or the like which is conventionally frequently used in this type of vibration damping device. As the viscoelastic rubber material, a material having a shear modulus of about 1.0 to 1.3 is optimal, and butyl rubber, high-damping natural rubber and the like can also be used. is there. In addition, on the lower surface of the fixing base 4, a flange 9 for fixing the fixing base 4 to a building and a fastening bolt hole 1 are provided.
0 is provided. Spherical convex portion 3 of movable table 1
Has, for example, a hemispherical shape obtained by dividing a sphere in half by a plane passing through its center.

The reason why the spherical convex portion 3 of the movable base 1 is spherical is that when the apparatus is viewed from above, that is, when the apparatus is viewed as shown in FIG. This is because a substantially uniform damping effect can be obtained in the horizontal direction without any property. Therefore, the spherical projection 3 does not necessarily have to be a part of a true sphere. That is, it may be a part of an ellipse close to a sphere, or a part of a sphere or two-thirds of a sphere, which is not a half of a sphere. Is also good. Furthermore, in the present invention, a spherical surface means a substantially spherical surface as a whole, and there may be a part that is not spherical. Further, one or both of the spherical convex portion of the movable base 1 and the concave portion 5 of the fixed base 4 may be formed into a substantially spherical surface by combining flat surfaces, for example, as a part of a polyhedron.

The concave portion 5 of the fixing base 4 has only to have a shape capable of accommodating the spherical convex portion 3, and does not necessarily have to be a hemispherical shape completely corresponding to the shape of the spherical convex portion 3. By appropriately adjusting the thickness of the vibration damping material 6 interposed therebetween, the gap between the spherical convex portion of the movable base 1 and the concave portion 5 of the fixed base 4 can be filled to accommodate the spherical convex portion 3. Because. In any case, there is an effect that the effective area of the vibration damping material 6 with respect to the occupied area is increased as compared with the case where the vibration damping material 6 is provided in a plane.

FIGS. 3A and 3B are views for explaining the operation of the vibration damping device of the present invention. FIG. 3A is an exploded perspective view, and FIG. 3B is a cross-sectional view of the device when the support is tilted. As shown in FIG. 2A, in this example, the spherical convex portion 3 of the movable base 1 is just hemispherical, and the vibration damping material 6 is provided in the concave portion 5 of the fixed base 4 having a corresponding shape. It is attached with a predetermined thickness.
Thus, even when a load is applied to the movable base 1 in any direction as indicated by the arrow F in the drawing, substantially uniform rigidity and a vibration damping function can be exhibited.

Further, due to the action of the spherical projection 3 of the movable base 1, a very good vibration damping effect is exerted even against a load that swings the column 7 shown in FIG. As shown in the figure, it is assumed that the column 7 is inclined by θ from the initial vertical state. In this case, assuming that the total length of the column 7 is L, the upper end of the column 7 moves by about Lθ. That is, even if a beam or the like supported by the upper end of the column 7 vibrates in the horizontal direction with an amplitude of 2Lθ,
This vibration damping device can absorb the vibration by deformation of the vibration damping material 6. Therefore, the vibration damping device of the present invention can cope with a very large deformation even with a small size.

Next, the function and effect of the limiter member 8 will be described. FIGS. 4A and 4B are longitudinal sectional views of the vibration damping device for explaining the operation and effect of the limiter member 8. FIG.
(A) has shown the state when the support | pillar 7 rocked largely. As shown in the drawing, in the device having the above structure, when the column 7 swings, the upper surface (the column fixing portion 2) of the movable base 1 is inclined. At this time, the limiter member 8 collides with the upper part of the fixed base 4.

That is, when a load is applied to the movable base 1 through the support 7 and the movable base 1 is inclined,
It collides with the upper part of the fixed base 4 and prevents further swinging of the column 7. Therefore, the column 7 is prevented from abnormally tilting, and the building is prevented from collapsing. As described above, the vibration damping device of the present invention has an effect of reinforcing the building in cooperation with the general support of the building.

From the above, the limiter member is supported by the support 7
Any function may be used as long as it has a function of restricting the inclination of a certain degree or more, and its shape is arbitrary. Therefore, instead of being a flange shape as described above, a bar-like member extending around the movable base 1 may be used. Any structure may be used as long as the movable table 1 moves together with the movable table 1 and collides with the upper part of the fixed table 4 when the movable table 1 is inclined.

Next, consider a case where a large vertical load is applied to the vibration damping device due to, for example, pitching or breakage of another column of the building. FIG. 4B shows a state where a large vertical load is applied to the column 7. When a vertical load is applied to the movable base 1 through the support 7, the vibration damping material 6 is compressed, and the gap between the spherical projection 3 of the movable base 1 and the concave part 5 of the fixed base 4 is minimized. At this time, the limiter member 8 collides with the upper part of the fixed base 4 and maintains the compressed thickness of the vibration damping material 6 at a predetermined value or more. In other words, the vibration damping material 6 is prevented from being further collapsed, and the spherical projection 3 of the movable base 1 and the concave part 5 of the fixed base 4 are prevented from directly colliding.

In this way, it is possible to prevent the vibration damping material 6 from cracking due to the vertical load, and to compensate for the vibration damping effect on the subsequent rolling. That is, if the spherical convex portion 3 of the movable base 1 and the concave portion 5 of the fixed base 4 directly collide, the vibration damping material 6 in the vicinity thereof breaks, cracks or peels off, and comes after pitching. There is a possibility that the function of attenuating the roll vibration is lost. The limiter member 8 has a function of protecting the vibration damping member 6 in this way.

Further, as shown in FIG. 4 (b), a load is applied to the movable base 1 to compress the vibration damping material 6, and the spherical projection 3 of the movable base 1 and the concave part 5 of the fixed base 4 are connected. When the gap therebetween is minimized, the movable base 1 is directly supported on the fixed base 4 via the limiter member 8. That is, the vibration damping material 6
Will kill the function. Therefore, in this state, the support 7
Swing can be completely prevented.

For example, it is assumed that the pillar supporting the ceiling of the building around the vibration damping device has collapsed due to the shaking of the earthquake. In that case, a large vertical load is applied to the column 7 of the vibration damping device. In this case, the vibration damping device is required to have a function as a pillar supporting a ceiling of a building rather than a vibration damping function. Therefore, when a large load is applied,
The fixing base 4 is provided through the limiter member 8. The movable base 1 is directly supported, and functions as a strong pillar as it is.

FIG. 5A is a side view showing a specific use state of the vibration damping device of the present invention. (B) is a top view of the support, (c) is a cross-sectional view taken along line AA of the support, and (d) is a bottom view of the support. As shown, the vibration damping device of the present invention is sandwiched between lower beams 18 and upper beams 19 of a building between columns 20 of the building. The support 13 shown in this figure is
It is reinforced by providing ribs 16 around the column 7 shown in FIG. The upper plate 15 fixed to the upper part of the column 13 is fixed to the upper beam 19. For fixing, bolt hole 2 shown in (b)
Use 1. The lower plate 14 is fixed on the upper surface of the movable base 1. For fixing, a bolt hole 22 shown in (d) is used.

It is to be noted that the vibration damping device as shown in FIG. 5 is not necessarily fixed to the lower beam 18 of the building with the fixing stand 4 down as shown in FIG. May be. For example, the fixing base 4 may be fixed so as to hang from the upper beam 19, and the column may be disposed between the fixing base 4 and the lower beam 18. Similarly, the device may be used sideways or at an angle. The length and shape of the support can be freely set.

<Effect of Specific Example 1> The vibration damping device having the above configuration can have sufficient rigidity and vibration damping function even if the occupied area is small. In addition, there is an effect of having a stable energy absorbing ability even for a large deformation. In addition, since there is no directionality, there is a sufficient vibration damping effect against swinging in any direction, and since the structure is relatively simple, it can be manufactured robustly and at low cost. Further, as described above, there is an effect that the building is reinforced in cooperation with the pillar of the building.

<Specific Example 2> In this specific example, the vibration damping material 6 of the specific example 1 is made into a liquid. For example, there are high-viscosity high-molecular materials such as low-molecular-weight polyethylene and silicone oil. Even if such a viscous fluid is used as the vibration damping material 6, a vibration damping effect can be expected. Also, the entire vibration damping material does not necessarily have to be a viscous fluid. The viscoelastic rubber part and the viscous fluid part may be mixed.

FIG. 6 shows a vibration damping device according to the second embodiment.
(A) is a top view, and (b) is a longitudinal sectional view along the AA line. In the figure, the configurations of the movable table 1, the column fixing section 2, the spherical convex section 3, the fixing table 4, the concave section 5, the column 7, and the limiter member 8 are the same as those in the first embodiment. The gap between the spherical projection 3 of the movable base 1 and the recess 5 of the fixed base 4 is filled with a vibration damping material 42 made of a viscous fluid.

Since the viscous fluid has no rigidity, a bearing made of an incompressible material is used to maintain a gap between the spherical projection 3 of the movable base 1 and the recess 5 of the fixed base 4 in this state. 41 is sandwiched. Specifically, the bearing 41 is made of a steel ball or the like. If the bearing 41 is arranged substantially horizontally so that the opening of the concave portion 5 of the fixed base 4 faces upward, the movable base 1 can be automatically supported at the bottom of the concave portion 5.

The use of the bearing 41 is not only a function as a spacer for maintaining a gap between the spherical projection 3 of the movable base 1 and the recess 5 of the fixed base 4, but also a function of the spherical projection of the movable base 1. This is because the portion 3 can freely swing on the concave portion 5 of the fixed base 4. For this purpose, it is preferable that there be a plurality of bearings 41.

FIGS. 7A and 7B show some modified examples of the second embodiment, and FIG.
(B) shows an example in which a stretchable lid is provided, and (c) shows an example in which irregularities are provided. In FIG. 1A, for example, three bearings 41 made of an incompressible material are arranged at the bottom of the concave portion 5 of the fixing base 4. If these bearings 41 are arranged substantially horizontally so that the opening of the concave portion 5 of the fixed base 4 is at the top, it is possible to automatically support the movable base 1 at three points at the bottom of the concave portion 5. it can. In the example given here, the number of the bearings 41 is three, but more bearings may be used.

In the example shown in FIG. 3B, expansion and contraction are performed near the opening of the concave portion 5 of the fixed base 4 so as to close the gap between the spherical projection 3 of the movable base 1 and the concave portion 5 of the fixed base 4. Sex lid 43 is provided. The elastic cover 43 is provided to prevent the vibration damping material 42 made of the viscous fluid from spilling and to prevent dust and the like from jumping into the viscous fluid. Lid 43
Is made elastic so that the movable table 1 does not hinder swinging on the fixed table 4. The stretchable lid 43 may have any shape such as a straight or loose shape or a stretchable film made of rubber or the like.

By providing the elastic cover 43 in this manner, the vibration damping device having this structure can be mounted on the fixed base 4 with the support column 7 down, or mounted on an inclined portion. . Further, the elastic lid 43 may be rubber having a certain thickness, for example. In this case, since the elastic lid 43 itself has a function of maintaining a gap between the spherical projection 3 of the movable base 1 and the concave part 5 of the fixed base 4, the bearing 41 may be omitted. Although the rigidity of the vibration damping material portion is insufficient, the vibration damping effect can be sufficiently expected.

In the example shown in FIG. 9C, an example of a stretchable lid 44 using a thick rubber is shown. This rubber is preferably the viscoelastic rubber used in Example 1. The remaining part of the vibration damping member 42 is made of a viscous fluid. A bearing 41 is provided between the spherical projection 3 of the movable base 1 and the recess 5 of the fixed base 4.
Is sandwiched.

Here, in this specific example, irregularities are formed on the surface of the spherical projection 3 of the movable base 1 which is in contact with the vibration damping material 42. This unevenness is caused by the spherical projection 3 and the vibration damping material 42.
This is to increase the friction between them and enhance the vibration damping effect. Therefore, if any one or both of the spherical convex portion 3 of the movable base 1 and the concave portion 5 of the fixed base 4 are provided with irregularities, a predetermined effect can be expected. The shape of the unevenness is arbitrary. In addition, one or both of the spherical convex portion 3 and the concave portion 5 of the fixing base 4 may be provided with irregularities such as a part of a polyhedron.

<Effects of Embodiment 2> As described above, the same effects as those of Embodiment 1 can be obtained even when a viscous fluid is used as the vibration damping material.

<Embodiment 3> In this embodiment, an example in which a spherical elastic body is used as a vibration damping material will be described. 8A and 8B are diagrams illustrating a vibration damping device according to a third embodiment, where FIG. 8A is a cross-sectional view of the vibration damping device, FIG. 8B is an enlarged side view of a main part explaining the operation and effect, and FIG. It is a principal part enlarged side view which shows an example. As shown in FIG.
A plurality of spherical elastic bodies 47 are sandwiched in a gap between the spherical projection 3 of the movable base 1 and the recess 5 of the fixed base 4. As the spherical elastic body 47, a ball made of rubber or plastic is suitable. The spherical shape is used so that the spherical convex portion 3 of the movable base 1 freely swings in the concave portion 5 of the fixed base 4. The reason why the elastic member is used is that the elastic member has a vibration damping effect even for a compressive force or the like. The reason why a plurality of the spherical projections 3 are provided is that when the spherical projections 3 swing, the respective spherical elastic bodies 47 rub against each other while rolling, and friction occurs.
This is because a vibration damping effect is exhibited.

As shown in FIG. 5B, for example, when the spherical convex portion 3 swings in the direction of arrow X with respect to the concave portion 5, each of the spherical elastic members 47 is moved in the direction of arrow Y in FIG. Roll while rotating. At this time, the surfaces of the spherical elastic bodies 47 collide against each other. When the spherical elastic body 47 is a rubber ball, this frictional force is considerably large. Therefore, movable table 1
Acts to attenuate the swing of

In the example shown in FIG. 5C, a smaller spherical elastic body 48 is mixed between the spherical elastic bodies 47. Thereby, the gap between the spherical elastic bodies 47 and 48 is reduced, and the vibration damping effect by friction is further enhanced. In addition, each spherical elastic body 4
The diameter and number of 7, 48 are arbitrary, and can be freely selected according to the purpose and application. Also, as described above, the spherical elastic bodies 47, 4
When the vibration damping material is constituted by 8, the vibration damping material can be replaced or supplemented. Rubber is hardened and loses its elasticity when left without any external force for a long time. Therefore, it is preferable that such a structure is used to refresh the vibration damping part at the time of periodic inspection.

<Effect of Embodiment 3> The device of this embodiment is
In addition to having the same effects as those of the specific example 1, a plurality of spherical elastic bodies rub against each other while rolling, so that a high vibration damping effect can be exhibited. Further, there is an effect that the vibration damping portion can be easily replaced.

<Embodiment 4> FIG. 9 is a perspective view showing still another embodiment of the vibration damping device of the present invention. As shown in the drawing, the vibration damping device has a half-column shape. The movable base 51 in the figure has a column fixing portion 57 for fixing the column 7 and a columnar side convex portion 53. The fixed table 52 includes the movable table 5
It has a concave portion 54 for accommodating one columnar side convex portion 53. The vibration damping material 55 is a cylindrical side surface convex portion 5 of the movable base 51.
3 and the gap between the concave portion 54 of the fixing base 52 is filled. The limiter member 56 is formed in a flange shape extending the upper surface of the movable base 51 and is integrated with the movable base 51.

That is, in this specific example, the movable base 51 having a semi-cylindrical column shape is used to give directionality to the vibration damping effect. As shown in the figure, when the column 7 is vibrated by applying a stress in the direction of the arrow X, it exhibits substantially the same characteristics as the other specific examples. In addition, the limiter member 56 also has a function of preventing a certain or more displacement. On the other hand, when stress is applied in the direction of arrow Y, the cylindrical side surface convex portion 53 of the movable base 51 and the fixed base 52
The vibration damping material 55 in a portion close to the bottom between the concave portion 54 and the bottom has a vibration damping function within a range where the material is compressed and deformed. Since the vibration damping device of this specific example has a different vibration damping function depending on the direction of the stress, it is suitable for use in combination with a seismic isolation device having a different rigidity depending on the direction of the stress. In this specific example, if necessary,
Modifications as in the above specific examples 2 and 3 are possible.

<Effect of Specific Example 4> The vibration damping device of this specific example has an effect of having a stable energy absorbing ability against a large deformation even in a small size, similarly to the other specific examples described above.

[Brief description of the drawings]

FIG. 1 shows a specific example of a vibration damping device according to the present invention, wherein (a)
Is a top view thereof, and (b) is a longitudinal sectional view along the line AA.

FIGS. 2A and 2B are diagrams for explaining the operation of the conventional vibration damping device, wherein FIG. 2A is a side view of a main part of the vibration damping device in a state in which no rolling occurs, and FIG. FIG. 4C is a side view of a main part of another type of vibration damping device in a state where there is no roll, and FIG. 4B is a side view of a main part of another type of vibration damper at the time of maximum roll.

FIG. 3 is a view for explaining the operation of the vibration damping device of the present invention;
(A) is an exploded perspective view, and (b) is a cross-sectional view of the device when a support is inclined.

4 (a) and 4 (b) are longitudinal sectional views of a vibration damping device for explaining the function and effect of a limiter member 8. FIG.

FIG. 5A is a side view showing a specific use state of the vibration damping device of the present invention. (B) is a top view of the support,
(C) is a sectional view of the column along the line AA, and (d) is a bottom view of the column. It is.

6A and 6B show a vibration damping device according to a specific example 2, in which FIG. 6A is a top view and FIG. 6B is a longitudinal sectional view along the line AA.

7A and 7B show some modified examples of the specific example 2, in which FIG. 7A is a top view showing a state in which a plurality of bearings 41 are accommodated in a concave portion 5 of a fixed base 4, and FIG. For example,
(C) shows an example in which unevenness is provided.

FIG. 8 is a diagram illustrating a vibration damping device according to a third embodiment;
(A) is a cross-sectional view of the vibration damping device, (b) is an enlarged side view of a main part explaining the operation and effect thereof, and (c) is an enlarged side view of a main part showing a modification.

FIG. 9 is a perspective view showing a vibration damping device according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movable stand 2 Post fixing part 3 Spherical convex part 4 Fixed stand 5 Depression 6 Vibration damping material 7 Post 8 Limiter member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) F16F 15/08 F16F 15/08 NF term (reference) 2E002 MA07 MA11 MA12 MA13 3J048 AA03 AC05 AD05 BA02 BD08 BE04 BG01 DA01 EA38 3J069 AA34 BB01

Claims (10)

[Claims] A movable base having a column fixing part and a spherical convex part; a fixed base having a concave part for accommodating the spherical convex part of the movable base; a spherical convex part of the movable base; A vibration attenuating material that fills a gap between the concave portion of the fixed base and a support having one end fixed to a support fixed portion of the movable base, wherein the support is integrated with the movable base, and a load is applied to the movable base. And a limiter member for limiting the movement of the movable table by colliding with a part of the fixed table when the vibration damping material is deformed. 2. The vibration damping device according to claim 1, wherein the limiter member collides with an upper portion of the fixed base when a load is applied to the movable base and the movable base tilts, and the limiter member has a certain height or more. A vibration damping device characterized by preventing rocking of the vibration. 3. The vibration damping device according to claim 1, wherein the limiter member includes a load applied to the movable table, the vibration damping material being compressed, and the limiter member being formed between the spherical convex portion of the movable table and the concave portion of the fixed table. A vibration damping device characterized in that when the gap between them becomes minimum, it collides with the upper part of the fixed base to maintain the compressed thickness of the vibration damping material at a predetermined value or more. 4. The vibration damping device according to claim 1, wherein the limiter member is configured such that a load is applied to the movable table, the vibration damping material is compressed, and the limiter member is formed between the spherical convex portion of the movable table and the concave portion of the fixed table. A vibration damping device characterized in that when the gap between them becomes minimum, it collides with the upper part of the fixed base to completely hinder the swing of the column. 5. The vibration damping device according to claim 1, wherein the vibration damping material is made of a viscoelastic rubber. 6. The vibration damping device according to claim 1, wherein the vibration damping member is formed of a plurality of spherical elastic bodies interposed between a spherical projection of the movable base and a recess of the fixed base. A vibration damping device, comprising: 7. The vibration damping device according to claim 1, wherein the vibration damping material is made of a viscous fluid, and a bearing made of an incompressible material is sandwiched in the viscous fluid. Vibration damping device. 8. The vibration damping device according to claim 1, wherein the fixing base is disposed substantially horizontally so that an opening of the concave portion faces upward, the vibration damping material is made of a viscous fluid, and a vicinity of the opening of the concave portion. An elastic lid is provided so as to close a gap between the spherical protrusion of the movable base and the concave part of the fixed base, and in the viscous fluid, at least at the bottom of the concave part,
A vibration damping device, wherein a bearing made of an incompressible material is sandwiched. 9. The vibration damping device according to claim 7, wherein a surface of the movable base in contact with one or both of the spherical convex part and the concave part of the fixed base has vibration irregularities. A vibration damping device characterized by being formed. 10. A movable base having a column fixing part and a cylindrical side surface convex part, a fixed base having a concave part for accommodating the cylindrical side surface convex part of the movable base, and a cylindrical side surface convex part of the movable base. A vibration attenuating material that fills a gap between the portion and the concave portion of the fixed base, and a support having one end fixed to a support fixed portion of the movable base, wherein the movable base is integrated with the movable base. A vibration damping device, comprising: a limiter member that collides with a part of the fixed base when a load is applied to deform the vibration damping material to limit the movement of the movable base.