JPH10184078A - Vibration isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolation device, by which horizontal rigidity is lowered extremely while preventing the generation of buckling and which can be manufactured simply without extreme scaling-up. SOLUTION: A laminated rubber unit 23 has a plurality of iron plate pieces 29 in a vertically stratified shape. A plurality of rubber board pieces 30 are installed among the vertically adjacent iron plate pieces 29, 29 respectively in a shape that these each rubber board piece 30 is held directly by the iron plate pieces 29, 29 and in a shape that a plurality of the rubber board pieces 30 are connected mutually in the horizontal direction through these iron plate pieces 29, 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device suitable for use in constructing a building having seismic isolation performance.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing an example of a conventional laminated rubber type seismic isolation device, and FIG. 5 is a diagram showing a state where the laminated rubber type seismic isolation device shown in FIG. 4 is deformed.

Hitherto, a building having seismic isolation performance has been constructed, and as a seismic isolation device, a laminated rubber type seismic isolation device or the like installed between a foundation structure and a building body has been adopted. By the way, if the building itself is a relatively light-weight detached house using wooden or lightweight steel frames, the following measures must be taken to adopt a laminated rubber seismic isolation device. Met. For example, a laminated rubber seismic isolation device 50
As shown in FIG. 4, in order to cope with a low load on the building body side, the horizontal rigidity of the laminated rubber portion 51 formed in a column shape is set relatively low. Specifically, the length / width ratio of the laminated rubber portion 51 is made relatively large, that is, the laminated rubber portion 51 is formed to be elongated. (Also, as another example, it is possible to adopt a mechanical type such as a ball bearing type seismic isolation device without using the laminated rubber type seismic isolation device. In order to guarantee, maintenance for rust, dust, friction, etc., and complicated maintenance such as operation check are required, which is unsuitable for adoption in houses.)

[0004]

However, in the above-described laminated rubber type seismic isolation device 50, when the laminated rubber portion 51 is elongated, it is displaced horizontally as shown by a solid line in FIG. However, there is a risk of buckling in the form shown by the two-dot chain line in FIG. Thus, conventionally, there has been a demand for a seismic isolation device that minimizes horizontal rigidity and hardly causes buckling.

[0005] Several proposals have been made so far in order to achieve the object of reducing the horizontal rigidity as much as possible and making buckling hard to occur as described above. Examples thereof include a multi-stage seismic isolation device disclosed in JP-A-63-300160 and a seismic isolation device disclosed in JP-A-7-90942.

In the multi-stage seismic isolation device disclosed in Japanese Patent Application Laid-Open No. 63-300160, the vertical / horizontal ratio is increased by laminating laminated elastic bodies (laminated rubber) up and down, the horizontal rigidity is lowered, and the horizontal direction is reduced. The plurality of laminated elastic bodies arranged in the above are restrained by a stabilizer to prevent buckling. However, a new problem arises in that the device itself is increased in size by stacking a plurality of laminated elastic bodies one above the other.

[0007] In the seismic isolation device of JP-A-7-90942,
The horizontal rigidity is reduced by providing a plurality of hollow parts vertically penetrating the laminated rubber, and buckling is devised by devising the shape and forming position of these hollow parts so that the wall pressure of the laminated rubber does not become thin. Less likely to occur. However, such a seismic isolation device is difficult to manufacture because the formation of the hollow portion is complicated.

In view of the above circumstances, the present invention provides a seismic isolation device which can reduce horizontal rigidity as much as possible, prevent buckling, and can be manufactured easily without increasing the size as much as possible. Aim.

[0009]

That is, according to a first aspect of the present invention, there is provided an apparatus body (23), wherein the apparatus body (2) is provided.
3) A plurality of horizontal plate-shaped reinforcing stabilizers (29) in upper and lower layers, and the reinforcing stabilizers (29) vertically adjacent to each other.
In between, a plurality of horizontal plate-like elastic plate pieces (30) are directly sandwiched by the reinforcing plate members (29, 29) vertically adjacent to each other, and The plurality of elastic plate pieces (3) are interposed via these reinforcing stabilizers (29).
0) are provided so as to be connected to each other in the horizontal direction.

According to a second aspect of the present invention, in the seismic isolation device (20) according to the first aspect, a foreign matter intrusion prevention covering material (31) is coated on a side portion of the device main body (23). Provided.

A third aspect of the present invention is the seismic isolator (20) according to the first aspect of the present invention, wherein the reinforcing stabilizers (29, 29) are arranged between the vertically adjacent reinforcing stabilizers (29, 29). , 29) sandwiched between the viscoelastic damping members (7
0) was installed.

It should be noted that the numbers in parentheses and the like are for convenience showing the corresponding elements in the drawings, and therefore, the present description is not limited to the description on the drawings. The same applies to the following operation columns.

[0013]

According to the first aspect of the present invention, a plurality of elastic plate pieces (30) between vertically adjacent reinforcing stabilizing plates (29, 29) have the same structure as the reinforcing stabilizing plate (29).
The connection is restricted.

In the second aspect of the present invention, the gaps (29a) between the reinforcing stabilizers (29) arranged in upper and lower layers are provided.
It is possible to prevent foreign matter from entering the coating.
Is prevented by

In the third aspect of the present invention, when the apparatus main body (23) is horizontally displaced, a part of the energy of the displacement is caused by the viscoelastic damping between the reinforcing stabilizers (29, 29). It is absorbed by the member (70).

[0016]

FIG. 1 is a front view showing an example of a seismic isolation device according to the present invention, FIG. 2 is a sectional view taken along line X1-Y1 of FIG.
FIG. 2 is a schematic view showing a building in which the seismic isolation device shown in FIG. 1 is adopted.

The building 1 such as a detached house (a relatively light-weight house such as one using a light-weight steel frame or a wooden structure) includes:
As shown in FIG. 3, it has a substructure 3 constructed on the ground 2, and a plurality of seismic isolation devices 20 described later on the substructure 3, and a living space (not shown) inside. The building body 5 having the above-mentioned structure is erected on the ground side. The base structure 3 and the building body 5 are cut off except for being connected via a plurality of seismic isolation devices 20.

As shown in FIGS. 1 and 2, each of the seismic isolation devices 20 includes a lower flange 21 which is a horizontal disk-shaped iron plate joined to the substructure 3 side, and a horizontal disk joined to the building body 5 side. An upper flange 22 is formed in the shape of an iron plate and is opposed to each other in a vertical direction. A cylindrical laminated rubber unit 23 extending vertically between the upper and lower flanges 21 and 22 extends vertically.
Is installed.

The laminated rubber unit 23 is formed with upper and lower flanges 21 and 22 so as to form upper and lower ends thereof.
The upper rubber plate 25 has an upper rubber plate 25 and a lower rubber plate 26 which are horizontal disk-shaped rubber plates having a smaller diameter than the upper rubber plate 25.
And the upper flange 22, and between the lower rubber plate 26 and the lower flange 21, respectively. Upper rubber plate 25
A cylindrical laminated body 27 (that is, a cylindrical shape equal to the diameters of the upper rubber plate 25 and the lower rubber plate 26) extending vertically and vertically is provided between the upper and lower rubber plates 26.
Are a plurality of iron plate pieces 29 which are horizontal disk-shaped iron plates (that is, disks equal in diameter to the upper end rubber plate 25 and the lower end rubber plate 26).
And a horizontal disk-shaped rubber plate (that is, 4 to
A plurality of rubber plate pieces 30 each having a diameter of about one-fifth, which may be made larger or smaller depending on the case, and the shape is not limited to a circle, are adhesively bonded to each other. It is configured in a form of being laminated.

The iron plate piece 29 in the laminate 27
The laminating mode of the rubber plate piece 30 is as follows. That is, the plurality of iron plate pieces 29 are arranged in an upper and lower layer shape, and four rubber plate pieces 30 are provided between the vertically adjacent iron plate pieces 29, 29 (this number may be two or more if necessary). However, each of the rubber plate pieces 30 is directly sandwiched between the iron plate pieces 29, 29, and the four rubber plate pieces 3 are interposed therebetween.
0 are arranged so as to be connected to each other in the horizontal direction.
Specifically, as shown in FIG.
The horizontal distance D1 from each of the rubber plate pieces 30 to the axial center CT1 of each of the rubber plates 9 and 29 is equal for all four rubber plate pieces 30, and the four rubber plate pieces 30 are the same as the shaft center CT1.
Are arranged at a pitch α (e.g., 90 degrees) equal to the center. The uppermost and lowermost portions of the laminated body 27 are iron plate pieces 29, respectively, and the iron plate pieces 29, 29 and the above-described upper end rubber plate 25 and lower end rubber plate 26 are bonded to each other.

In the laminate 27, the iron plate piece 2
A plurality of rubber plate pieces 30 vertically adjacent to each other through 9
Each of the rubber plate pieces 30 is disposed at a position corresponding to the vertical direction (of course, the rubber plate piece 30 may not correspond to the vertical direction as another embodiment). It can be considered that the columnar laminated column 35 is formed by the rubber plate pieces 30 and the plurality of iron plate pieces 29 alternately laminated thereon. That is, in this embodiment, in one laminated body 27,
Four laminated pillars 35 are formed (however, the iron plate piece 29 in each laminated pillar 35 is formed by four laminated pillars 35).
It is a form that shares the same members. ).

Further, a side periphery of the laminated rubber unit 23 is covered with a rubber film 31 (note that in FIG.
1 only), iron plate pieces 29 vertically adjacent to each other,
Foreign matter such as dust is prevented from inadvertently entering the gap 29a between the gaps 29. Further, between the iron plate pieces 29, 29 adjacent vertically, these iron plate pieces 29, 29
A viscoelastic resin 70, which is a viscoelastic damping member, is provided in a form sandwiched between the two.

Since the building 1, the seismic isolation device 20, and the like are configured as described above, when the substructure 3 receives a horizontal seismic force, the substructure 3 and the plurality of 20
The seismic force need not be transmitted as much as possible to the building body 5 connected only through the seismic isolation device 20 by the action of the seismic isolation device 20. That is, in each seismic isolation device 20, the seismic force transmitted through the foundation structure 3 acts on the lower flange 21 side, while the building body 5 side is applied to the upper flange 22 side. The inertial force transmitted via the second member acts in a direction opposite to the seismic force. That is, in the seismic isolation device 20, the upper flange 22 side tends to displace in the horizontal direction with respect to the lower flange 21 side (or the lower flange 21 side with respect to the upper flange 22 side). However, the laminated rubber unit 23 of the seismic isolation device 20 includes the upper and lower flanges 21 and 22 described above.
The seismic force received on the lower flange 21 side is hardly transmitted to the upper flange 22 side, so that the seismic force is not transmitted to the building body 5 as much as possible. .

As described above, in the seismic isolation device 20, the plurality of rubber plate pieces 30 between the vertically adjacent iron plate pieces 29, 29 are connected and restrained by these iron plate pieces 29, 29, thereby forming a laminated rubber unit. The bending stiffness of 23 is improved and buckling hardly occurs. Therefore, the seismic isolation device 20
Then, since the horizontal cross-sectional area of each rubber plate piece 30 is made as small as possible and buckling hardly occurs even if it is configured as a device having a horizontal rigidity as low as possible, it is a seismic isolation device that can be adopted even in a relatively light-weight building or the like. . In the seismic isolation device 20, the iron plate piece 2
Since it is one single seismic isolation device made by laminating the rubber plate pieces 9 and the rubber plate pieces 30, it is not necessary to combine a plurality of laminated rubbers or the like (for example, conventional laminated rubber). Therefore, it is not necessary to increase the size of the apparatus as much as possible. Further, in the seismic isolation device 20, since there is no complicated limitation on the planar shape of the iron plate piece 29 and the rubber plate piece 30, a simple shape convenient for the manufacture, such as a circle, can be freely selected, so that the manufacture is easy. A seismic isolation device that can be used.

Further, in the seismic isolation device 20, the rubber film 31 is provided so as to cover the side portion of the laminated rubber unit 23, so that foreign matter or the like does not enter the gap 29a of the iron plate pieces 29 arranged in the upper and lower layers. This is prevented by the rubber film 31.
Therefore, it is possible to prevent a foreign object or the like from inadvertently entering the gap 29a of the iron plate piece 29, thereby preventing a proper operation of the seismic isolation device 20 from being hindered. Also, in the seismic isolation device 20, the viscoelastic resin 70 is installed in the gap 29a of the iron plate piece 29, so that when the laminated rubber unit 23 is horizontally displaced, a part of the energy of the displacement is Between the pieces 29, 29, these iron plate pieces 2
It is absorbed by the viscoelastic resin 70 which deforms along with 9 and 29. Therefore, energy due to an earthquake or the like is not
Since it is absorbed by zero, the shaking of the building 1 is further reduced, which is convenient.

[0026]

As described above, the first aspect of the present invention has an apparatus main body such as a laminated rubber unit 23, and the apparatus main body is capable of reinforcing and stabilizing a plurality of horizontal plate-like iron plate pieces 29 and the like. A plate material is provided in upper and lower layers, and a plurality of elastic plate pieces, such as a plurality of rubber plate pieces 30 in a horizontal plate shape, are placed between the vertically adjacent reinforcing stabilizing plate materials. In the seismic isolation device according to the present invention, since the plurality of elastic plate pieces are provided in such a manner that they are directly sandwiched by the plate members and the plurality of elastic plate pieces are connected to each other in the horizontal direction via these reinforcing stabilizer plates. The plurality of elastic plate pieces between the reinforcement stabilizing plate members adjacent to each other are connected and restrained by these reinforcing stabilizing plate members, whereby the bending rigidity of the apparatus main body is improved, and buckling hardly occurs. Therefore, according to the present invention, the seismic isolation device which minimizes the horizontal cross-sectional area of each elastic plate and minimizes buckling even as a seismic isolation device having the lowest horizontal rigidity can be used for relatively light-weight buildings. Becomes Further, in the present invention, the reinforcing stabilizing plate material and the elastic plate pieces are laminated to form
Since it is one single seismic isolation device, it is not a seismic isolation device made by combining a plurality of laminated rubbers, for example. Therefore, it is not necessary to increase the size of the apparatus as much as possible. Further, according to the present invention, there is no complicated limitation on the shape of the reinforcing stabilizing plate material and the elastic plate piece, and a simple shape convenient for manufacturing can be freely selected, so that the seismic isolation device can be easily manufactured.

According to a second aspect of the present invention, in the seismic isolation device according to the first aspect, a foreign matter intrusion preventing covering material such as a rubber film 31 is provided so as to cover a side portion of the device main body. In addition, foreign matter or the like is prevented from entering the gap between the reinforcing stabilizers arranged in the upper and lower layers by the foreign matter intrusion prevention covering material. Therefore, in addition to the effect of the first aspect, it is safe to prevent a foreign substance or the like from inadvertently entering the gap between the reinforcing stabilizing plates, thereby preventing proper operation of the seismic isolation device.

According to a third aspect of the present invention, there is provided the seismic isolator according to the first aspect of the invention, wherein the viscoelastic resin 70 is sandwiched between the reinforcing stabilizers vertically adjacent to each other. Since the viscoelastic damping member is installed, when the apparatus body is horizontally displaced, a part of the energy of the displacement is absorbed by the viscoelastic damping member between the reinforcing stabilizers. Therefore, in addition to the effect of the first aspect, since the energy due to the earthquake or the like is absorbed by the viscoelastic damping member, the shaking of the building or the like is further reduced, which is convenient.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a seismic isolation device according to the present invention.

FIG. 2 is a sectional view taken along line X1-Y1 of FIG. 1;

FIG. 3 is a schematic view showing a building in which the seismic isolation device shown in FIG. 1 is adopted.

FIG. 4 is a diagram showing an example of a conventional laminated rubber type seismic isolation device.

FIG. 5 is a view showing a state in which the laminated rubber type seismic isolation device shown in FIG. 4 is deformed.

[Explanation of symbols]

 20 seismic isolation device 23 device main unit (laminated rubber unit) 29 reinforcement reinforcing plate material (iron plate piece) 30 elastic plate piece (rubber plate piece) 31 foreign matter intrusion prevention coating material (rubber film) 70 …… viscoelastic damping member (viscoelastic resin)

Claims (3)

[Claims] An apparatus main body includes a plurality of horizontal plate-shaped reinforcing stabilizers in upper and lower layers, and a plurality of horizontal plate-shaped elastic stabilizers between vertically adjacent reinforcing stabilizers. A plate piece is formed by directly sandwiching each of these elastic plate pieces between the vertically adjacent reinforcing stabilizers, and the plurality of elastic plate pieces are connected to each other in the horizontal direction via the reinforcing stabilizers. Seismic isolation devices provided and configured respectively. 2. The seismic isolation device according to claim 1, wherein a foreign matter intrusion prevention covering material is provided so as to cover a side portion of the device main body. 3. The method according to claim 1, wherein the reinforcing stabilizers are vertically adjacent to each other.
2. The seismic isolation device according to claim 1, wherein a viscoelastic damping member is provided between said reinforcing stabilizers.