JPH08270254A - Three-dimensional seismic isolator - Google Patents

Abstract

PURPOSE: To absorb a quake and a shock working to arbitrary horizontal and vertical directions. CONSTITUTION: A vertical-quake isolation means 5 is installed on the internal bottom section of a casing 3, and a horizontal-quake isolation means 7 is placed to the upper section of the means 5. The vertical-quake response control means 5 has a plurality of quake absorbing elements 51 for absorbing a quake and a shock in the vertical direction. The horizontal-quake response isolation 7 movably bears a horizontal-quake response control block 73 in the arbitrary horizontal direction in a horizontal-quake absorbing vessel 71, and a large number of elastic balls 13 for cushioning are housed in a quake-absorbing clearance 75.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional seismic isolation device which is installed in a building and absorbs vibrations and shocks caused by an earthquake or the like.

[0002]

2. Description of the Related Art Generally, an earthquake is a composite of vibrations and shocks in arbitrary horizontal and vertical directions, and it is unpredictable in which direction, especially for horizontal vibrations. . Therefore, in order to protect a building from an earthquake, a seismic isolation device that supports both horizontal and vertical vibrations is required. Conventional seismic isolation devices generally deal with horizontal vibrations only in specific horizontal vibrations. There is a demand for a seismic isolation device that can absorb three-dimensional vibrations and shocks.

[0003]

SUMMARY OF THE INVENTION The technical problem of the present invention is that vibrations and impacts such as earthquakes acting in both horizontal and vertical directions can be absorbed by a device having a simple structure. To provide a three-dimensional seismic isolation device.

[0004]

In order to solve the above-mentioned problems, the three-dimensional seismic isolation system of the present invention is provided with a vertical seismic isolation means at the inner bottom of a casing fixed to a building foundation, and a horizontal seismic isolation device is provided above it. The vertical seismic isolation means is provided with an elastic member for absorbing vertical vibrations and shocks, and the horizontal seismic isolation means has an open upper end. A rolling isolation block that supports the building is supported inside the rolling absorption container so that it can move in any horizontal direction with a vibration absorbing gap around it, and between the container and the rolling isolation block. It is characterized in that it is configured by accommodating a large number of elastic balls for cushioning in the seismic absorption gap.

The horizontal seismic isolation block in the horizontal seismic isolation means has a large number of convex portions radially extending from the center thereof, and a holding space for holding the cushioning elastic balls is formed between the convex portions. Desirably, as the elastic member in the vertical seismic isolation means, it is desirable that a plurality of seismic absorption elements in which a metal plate and an elastic plate having a plurality of holes are alternately laminated are arranged on the inner bottom portion of the casing. .

[0006]

The three-dimensional seismic isolation device having the above-mentioned structure is installed in the building foundation to support the building. The horizontal seismic isolation means and the vertical seismic isolation means are installed in the horizontal and vertical directions, respectively. Absorb the vibration.

In the lateral seismic isolation means, the lateral seismic isolation block is supported so as to be movable in any horizontal direction with a seismic absorption gap around the seismic isolation block, and a large number of cushioning elastic balls are provided in the seismic absorption gap. By accommodating the above, it is possible to absorb a vibration in any horizontal direction and generate a return force to the original position. At this time, the rolling seismic isolation block has a large number of convex portions radially extending from its center, and by forming a holding space for holding the cushioning elastic balls between the convex portions, the container is formed. The elastic ball is prevented from being biased inside, and the elastic ball is evenly held in the holding space in the convex portion, and by extension, the quake is evenly applied to any horizontal vibration.

Furthermore, in the above-described vertical seismic isolation means,
The seismic absorption element is composed of an elastic member in which a metal plate and an elastic plate having a plurality of holes are alternately laminated, and a plurality of the seismic absorption elements are arranged on an inner bottom portion of the casing to form a hole in the elastic plate. As a relief allowance for the compressed elastic plate material, vertical vibrations and shocks are efficiently absorbed.

[0009]

1 to 3 show an embodiment of a three-dimensional seismic isolation device according to the present invention. This three-dimensional seismic isolation device 1 is generally provided on an inner bottom portion of a casing 3. A column 9 which is configured by providing a vertical seismic isolation means 5 and placing a horizontal seismic isolation means 7 above the vertical seismic isolation means 5, and which is flange-connected to a lateral seismic isolation block 73 of the lateral seismic isolation means 7 described later.
Is joined to the lower surface of the base plate A of the building.

The casing 3 is, as shown in FIG.
An inner case 32 having an open upper end that is fitted or loosely fitted into the inner bottom portion and the inner peripheral wall of the casing main body 31 formed of a metal such as stainless steel and having a substantially open upper end is inserted into the casing main body 31. Below the bottom part, a plurality of support containers 33 for supporting the vertical seismic isolation means 5 are provided.
Is recessed, penetrates the bottom of the casing body 31 and projects downward. A disc-shaped lid plate 34 made of metal such as stainless steel is provided on the upper surface of the casing body 31 so as to be movable in any horizontal direction on the upper surface of the casing body 31. A through hole 34a for loosely fitting the pillar 9 is formed at the center of the.
Further, on the bottom surface of the casing body 31, a flange portion 35 for fixing to the building foundation B made of concrete is provided around the casing body 31.

As shown in FIGS. 1 and 2, the vertical seismic isolation means 5 has a plurality of seismic absorption elements 51, which are elastic members for absorbing vertical vibrations and shocks, on the inner bottom of the casing 3. The elastic member forming the seismic absorption element 51 is composed of a laminated metal plate 55 formed of a metal such as stainless steel in a circular shape and an elastic material such as rubber or synthetic resin. A large number of laminated elastic plates 57 having the same shape as the metal plate 55 and having a plurality of holes 57a formed therein are alternately laminated, and a central shaft 59 made of a metal material such as stainless steel is fitted in the center in the axial direction. It is formed by doing. The central shaft 59 is fixed to the uppermost laminated metal plate 55 and laminated elastic plate 57, but not fixed to the other laminated metal plates 55 and laminated elastic plate 57. Then, the inner case 3 of the vibration absorbing element 51.
In order to limit the individual horizontal movement within 2,
The central axis 59 of the seismic absorption element 51 is loosely fitted in the support container 33 at the bottom of the inner case 32, and the lowermost surface of the laminated portion of the laminated metal plate 55 and the laminated elastic plate 57 is placed inside the inner case 32. The tip end of the central shaft 59, which is placed on the bottom portion and slightly protrudes above the seismic absorption element 51, is fitted into the support hole 11a of the support plate 11 placed on the upper surface of the seismic absorption element 51 for support. By doing so, it is disposed in the casing body 31. In the support container 33, a large number of large and small cushioning elastic balls 13 made of an elastic material such as rubber or synthetic resin for absorbing vertical and horizontal vibrations and impacts of the central shaft 59 are housed. Has been done.

As shown in FIGS. 1 and 3, the rolling seismic isolation means 7 is basically installed in a rolling seismic absorption container 71 having an open upper end, which is mounted on the support plate 11, and is constructed as shown in FIG. Base plate A
The seismic isolation block 73, which is formed by flange-connecting the support columns 9 for holding, is housed so as to be movable in any horizontal direction with the vibration absorbing gap 75 being interposed in the periphery, and the vibration absorbing gap 75 is made of rubber or synthetic resin. It is configured by accommodating a large number of large and small cushioning elastic balls 13 made of elastic material such as.

The rolling vibration absorbing container 71 is formed of a metal material such as stainless steel into a substantially cylindrical shape with an open upper end, and above the vibration absorbing element 51 of the vertical vibration isolation means 5.
It is vertically slidable on the inner case 32 and is placed on the support plate 11, and the rolling vibration absorbing container 71 is installed.
A large number of bearings 7 are provided on the inner bottom of the bearing to facilitate smooth horizontal movement of the seismic isolation block 73.
9 are laid. Further, on the upper surface of the rolling vibration absorbing container 71, a lid plate 81 formed in a disc shape with a metal material such as stainless steel for preventing the elastic cushioning balls 13 from coming off is provided. A through hole 81a is provided at the center of the lid plate 81 so as to be slidable in any horizontal direction on the upper surface of the column, and through which the column 9 connected to the rolling isolation block 73 is axially slidably penetrated. Has been drilled.

The seismic isolation block 73 has a support recess 73a formed in the center of the upper surface thereof, and the lower end of the support column 9 is flange-connected to the support recess 73a. 73b are provided so as to project, and a holding space 7 for holding the cushioning elastic balls 13 is provided between them.
3c is formed. Further, rubber or synthetic resin for absorbing impact at the time of collision between the projections 73b and the inner peripheral wall of the rolling vibration absorbing container 71 or the cushioning elastic balls 13 is provided at the tips of the projections 73b. The cushioning sheet 73d made of elastic material is attached.

In order to absorb the impact when the rolling seismic isolation block 73 collides with the inner peripheral wall of the rolling shaking absorbing container 71, as shown in FIGS. It is desirable to form a buffer wall 71a on the inner peripheral wall of which a metal plate made of stainless steel or the like and an elastic plate made of an elastic material such as rubber or synthetic resin are alternately laminated.

The large and small cushioning elastic balls 13 are made of rubber or soft synthetic resin, respectively, and hold the seismic absorbing gap 75 around the seismic isolation block 73 in the rolling seismic absorbing container 71 and its peripheral surface. The space 73c is evenly filled. Further, on the upper surface of the seismic isolation block 73, the edge portion of the seismic absorption container 71 and the pillar 9 are supported.
Similar elastic balls 13 are also filled in the gaps between and. At this time, the small elastic balls 13 are placed in the gaps between the large elastic balls 13 filled with each other.
By accommodating the
Can be packed in the rolling vibration absorbing container 71 at a high density.

When the three-dimensional seismic isolation device 1 having the above structure is installed, the three-dimensional seismic isolation device 1 is joined to the building foundation B,
A plurality of these three-dimensional seismic isolation devices 1 are connected to the lower surface of the foundation plate A of the building by arranging a plurality of them at appropriate locations on the construction site.

More specifically, the casing body 3 described above.
The flange portion 35 provided around the bottom surface of No. 1 is fixed on the building foundation B through the abutment plate 15 made of an elastic material such as rubber or synthetic resin, and the plurality of three-dimensional isolations arranged in the building are provided. The upper ends of the columns 9 of the respective three-dimensional seismic isolation devices 1 are attached to the lower surface of the foundation plate A so that each of the seismic devices 1 always works in the same direction with respect to vertical and horizontal vibrations and impacts. Flange joint. Here, it goes without saying that the building foundation B is preliminarily processed so as to embed the support container 33 protruding below the casing 3.

The structure of the three-dimensional seismic isolation device 1 is not limited to that described above. For example, although the drawing is omitted, the vertical seismic isolation means 5 is provided without providing the support container 33 as described above. The center axis 59 of the seismic absorption element 51 is directly placed on the inner bottom portion of the casing body 31, and the clearance allowance of the center axis 59 is recessed on the inner bottom portion of the casing body 31. Thus, the structure of the three-dimensional seismic isolation device 1 can be simplified so that the building foundation B is not processed, and the vertical seismic isolation means 5 is
The number, shape, arrangement, etc. of the vibration absorbing elements 51 in the elastic member 51 can be appropriately changed. Further, the lateral seismic isolation means 7 can be formed by appropriately changing the number of the convex portions 73b in the lateral seismic isolation block 73 according to the size of the three-dimensional seismic isolation device 1 and its installation location. . In addition, the laminated elastic plate 57 in the seismic absorption element 51 of the vertical seismic isolation means 5, the large and small cushioning elastic balls 1 described above.
3, the cushioning sheet 73d attached to the tip of the convex portion of the seismic isolation block 73 of the seismic isolation device 7, and the elastic plate of the cushioning wall 71a on the inner peripheral wall of the seismic absorption container 71 are as described above. The material is not limited to rubber, synthetic resin, or the like, and can be formed of a material having elasticity and restoring force equivalent to those.

In the three-dimensional seismic isolation device 1 having the above-mentioned structure, in the vertical seismic isolation means 5, the seismic absorption element 51 is
By arranging a plurality of the seismic absorption elements 51 on the inner bottom portion of the casing 3, the laminated metal plate 55 and the elastic laminated elastic plate 57 having a plurality of holes 57a are alternately laminated to form an elastic member. Hole 57a of laminated elastic plate 57
As a relief allowance for the compressed elastic plate material, vertical vibrations and shocks are efficiently absorbed.

Further, in the lateral vibration isolation means 7,
Since the seismic isolation block 73 is accommodated around the lateral seismic isolation block 73 so as to be movable in any horizontal direction, the seismic absorption can be applied to any horizontal vibration and impact. At the same time, it is possible to generate a restoring force to the original position of the rolling seismic isolation block 73. At this time, since a large number of bearings 79 are laid on the inner bottom of the rolling vibration absorbing container 71, the horizontal movement isolation block 73 can be smoothly moved in any horizontal direction. Further, the rolling seismic isolation block 73 has a large number of convex portions 73b radially extending from the peripheral surface thereof, and a holding space 73c for holding the cushioning elastic balls 13 is formed between the convex portions 73b. As a result, the cushioning elastic balls 13 are prevented from being biased in the seismic absorption container 71, and the elastic balls 13 are evenly held in the holding spaces 73c of the convex portions 73b. Also, it is possible to evenly absorb the shock. In addition, the seismic isolation block 7 mentioned above
By attaching a cushioning sheet 73d to the tip of the convex portion 73b of No. 3 and further forming the cushioning wall 71a on the inner peripheral wall inside the vibration absorbing container, the convex portion 73b and the inner peripheral wall of the absorbing container 71 are formed. The impact at the time of collision can be further absorbed.

[0022]

As described in detail above, according to the three-dimensional seismic isolation device of the present invention, a device having a simple structure can be applied to vibrations and impacts acting in both horizontal and vertical directions such as earthquakes. You can take a quake at.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing a state in which a three-dimensional seismic isolation device of the present invention is installed in a building.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Three-dimensional seismic isolation device 3 Casing 5 Vertical seismic isolation means 7 Lateral seismic isolation means 13 Elastic ball for cushion 31 Casing body 51 Seismic absorbing element 55 Laminated metal plate 57 Laminated elastic plate 57a Hole 71 Shake absorbing container 73 Shake off Seismic block 73b Convex portion 73c Holding space 75 Seismic gap B Building foundation

Claims (3)

[Claims] 1. A vertical seismic isolation means is provided on an inner bottom portion of a casing fixed to a building foundation, and a horizontal seismic isolation means is placed above the vertical seismic isolation means. A plurality of seismic absorption elements, which are elastic members for absorbing vibrations and impacts in a certain direction, are provided.The seismic isolation means is a seismic isolation device that supports a building in a seismic absorption container with an open upper end. The block is supported movably in any horizontal direction with an absorbing gap around it, and a large number of cushioning elastic balls are housed in the absorbing gap between the container and the rolling isolation block. A three-dimensional seismic isolation device characterized by 2. The device according to claim 1, wherein the rolling isolation block in the rolling isolation means has a large number of convex portions radially extending from the center of the rolling isolation block for buffering between the convex portions. A three-dimensional seismic isolation device characterized in that a holding space for holding an elastic ball is formed. 3. The apparatus according to claim 1 or 2, wherein the vertical seismic isolation means comprises a plurality of seismic absorption elements formed of elastic members in which metal plates and elastic plates having a plurality of holes are alternately laminated. A three-dimensional seismic isolation device characterized by being arranged on the inner bottom of a casing.