JP2000009177A - Isolator and isolated structure of light structure having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively reduce the generation of large impulsive sound due to the vibration of an earthquake, require no labor for a replacing work and lower a cost without extremely extending a construction period by providing a prescribed range or limit meeting the anticipated amplitude stroke of the earthquake. SOLUTION: An earthquake-proof device comprises a lower support plate 2 fixed to a ground side, a spherical body 7 mounted on the lower support plate 2 so as to freely roll and an upper support plate supported on the spherical body 7 and fixed above the lower support plate 2 so as to hold the body 7 therebetween. On the upper surface of the lower support plate 2 and on the lower surface of the upper support plate, ring shaped stopper parts 6 and 13 for surrounding the spherical body 7 are formed. To the inner peripheral surfaces of the stopper parts 6 and 13, the outer peripheral surfaces of ring shaped shock absorbers 8 and 14 made of rubber or an elastic foaming material for surrounding the spherical body 7 are bonded.

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 used to attenuate earthquake vibrations and protect buildings from the earthquake vibrations, and to detached houses and the like provided with the seismic isolation devices. This is related to the seismic isolation structure of light weight structures.

[0002]

2. Description of the Related Art As is well known, as a conventional seismic isolation device for protecting a building from vibrations caused by an earthquake, a seismic isolation device that supports an upper structure from below with a laminated rubber in which rubber plates and iron plates are alternately stacked. It has been proposed and has been put to practical use in some cases. However, the seismic isolation device having such a structure is effective when applied to a heavy structure such as a concrete building such as a high-rise building, and aims at seismic isolation of a light-weight structure such as a detached house. In some cases, it is not always effective. On the other hand, as a seismic isolation device that is more effective than the above-mentioned seismic isolation device using laminated rubber for seismic isolation of such lightweight structures, a lower bearing plate fixed to the ground side and a lower base plate fixed to the building side There has been proposed a seismic isolation device having a structure in which one or a plurality of spheres are arranged between an upper support plate and the spheres are rolled on the lower support plate and below the upper support plate by an earthquake.

By the way, when such a seismic isolation device using a sphere as a component is used for a light-weight structure such as a detached house, if an effective seismic isolation function is expected even for an earthquake having a long amplitude stroke, The length and width of the lower support plate and the upper support plate on which the spheres are mounted may be designed to be long. However, if these lower and upper support plate devices are made to be long, they not only increase the cost, but also limit the site area of the house, as well as the adjacent houses, fences and other structures. In consideration of the distance to an object, it is practically impossible to make the device unlimitedly long. Therefore, a certain range or limit that can correspond to the amplitude stroke of the anticipated earthquake is provided, and even if an earthquake having an amplitude stroke greater than the range or the limit occurs, the sphere is moved from the lower support plate or the upper support plate. It is necessary to prevent falling off. Therefore, a certain range or limit that can correspond to the amplitude stroke of the earthquake is provided in this way, and even when an earthquake having an amplitude stroke larger than the range occurs,
As a conventional seismic isolation device having a structure in which a sphere does not fall off, for example, a seismic isolation device described in JP-A-6-158912 has been proposed. In this seismic isolation device, a stopper portion (inner wall 10) is formed which is raised or hung from an outer peripheral edge of an upper surface of a lower support plate (spherical case 1B) and an outer peripheral edge of a lower surface of an upper support plate (spherical case 1A). Further, a number of tension springs 6 are provided as components that restrict the relative horizontal movement of the lower support plate and the upper support plate within a certain range. Therefore, according to the conventional seismic isolation device having such a configuration, the lower bearing plate and the upper bearing plate relatively start horizontal movement due to the vibration of the earthquake through the rolling of the sphere provided therebetween, and eventually. When the sphere reaches the stopper, the stopper further restricts the horizontal movement of the lower bearing plate and the upper bearing plate. The horizontal movement of the lower and upper bearing plates is also restricted by the elastic force of the plurality of tension springs, and the tension springs restore the seismic isolation device to a state before the occurrence of the earthquake. It also acts as a force. In addition, as described above, a method is provided in which a certain range or limit is provided that can correspond to an amplitude stroke of an expected earthquake, and when an earthquake having an amplitude stroke that exceeds the range or the limit occurs, the seismic isolation effect is restricted. As an example, a device provided with a damper, a stopper, and the like at a position apart from the installation position of the seismic isolation device has been proposed.

[0004]

However, in the seismic isolation device described in Japanese Patent Application Laid-Open No. 6-158912, when an earthquake having an amplitude stroke exceeding the seismic isolation range occurs, the sphere collides with the stopper. As a result, a loud impact sound is generated for each impact. In addition, this seismic isolation device has the effect of restricting the relative horizontal movement between the lower support plate and the upper support plate even with a large number of tension springs, but how to set the elastic modulus of the tension spring is a technical issue. And the replacement work also takes time. In addition, if dampers and stoppers are installed at locations distant from the location of the seismic isolation device, it is necessary to install a large number of them in consideration of the need to respond to seismic motion in all directions. Are greatly extended and costly, and cannot be practically adopted.

Accordingly, the present invention has been proposed to solve the various problems of the above-mentioned conventional seismic isolation device and the like, and has a certain range or limit capable of coping with an anticipated earthquake amplitude stroke. Despite the installation, it is possible to effectively reduce the generation of loud impact noise due to the vibration caused by the earthquake, does not require large labor for replacement work, furthermore, does not cause a significant extension of the construction period and suppresses the price It is an object of the present invention to provide an epoch-making seismic isolation device that can be used and a seismic isolation structure of a light-weight structure provided with the seismic isolation device.

[0006]

The present invention has been proposed to achieve the above object, the first to sixth inventions are seismic isolation devices, and the seventh invention is a light weight structure. It is a seismic isolation structure. Therefore, the first invention (the invention described in claim 1) includes a lower support plate fixed to the ground, a sphere rollably mounted on the lower support plate, and a sphere supported by the sphere. An upper support plate fixed above the lower support plate with the sphere interposed therebetween, and the upper surface of the lower support plate and / or the lower surface of the upper support plate are provided with the sphere. Is formed, and an outer peripheral surface of a ring-shaped shock absorber made of rubber or elastic foam is adhered to an inner peripheral surface of the stopper portion. It is characterized by the following.

The rubber which is one of the materials of the shock absorber constituting the first invention is a natural rubber (latex rubber), styrene rubber, butadiene rubber, styrene-butadiene rubber, chloroprene rubber, butyl rubber. ,
Synthetic rubber such as nitrile rubber, ethylene-propylene rubber, acrylic rubber, urethane rubber, silicone rubber, fluorine rubber, polysulfide rubber, or a thermoplastic elastomer can be used. Examples of the thermoplastic elastomer include olefin elastomers (polyethylene elastomer, polypropylene elastomer), amide elastomers (polyamide elastomer), styrene elastomers (styrene-butadiene-styrene copolymer, styrene-isoprene-styrene copolymer, styrene-ethylenebutylene-styrene). Copolymer), polyurethane, and urethane-based elastomer. Further, as the urethane-based elastomer, thermoplastic polyurethanes such as thermoplastic polyether polyurethane and thermoplastic polyester polyurethane can be used. In addition, as such rubber, more specifically, trademark “Hanenit” related to the manufacture of Naigai Rubber Co., Ltd.
Alternatively, the trademark “Haplagel” related to the manufacture of Dai-Ichi Denko Corporation may be used. Further, as the elastic foam, a sponge-like porous polyurethane, a porous polyvinyl marmal, or a urethane foam, a cellulose foam, a nylon foam, or the like is used as the elastic foam which is another material of the shock absorber. can do. More specifically, as the elastic foam, a trademark “Memory Foam” made of polyurethane foam and sold by Casey Shokai Co., Ltd. may be used.

The second invention (the invention according to claim 2)
In the first aspect, the shock absorber may include a ring-shaped hard layer made of a hard rubber or an elastic foam, and a rubber or an elastic material having a hardness lower than that of the rubber or the elastic foam constituting the hard layer. A ring-shaped intermediate layer made of foam, and a ring-shaped soft layer made of rubber or elastic foam having a lower hardness than rubber or elastic foam constituting this intermediate layer, It is characterized by being laminated in any order in the radial direction.

[0009] The hard layer constituting the second invention,
The medium layer and the soft layer can be obtained by appropriately extracting three materials having different hardnesses from the rubber or elastic foam described above, and stacking those materials in any order in the radial direction of the shock absorber.
The order of lamination is not particularly limited. The rubber that can be used as the hard layer is one that is relatively determined in relation to the hardness of the rubber or elastic foam used for the other middle or soft layers. For example, urethane rubber, Acrylic rubber, fluorine rubber, or the like can be used. Also,
As the intermediate layer, for example, nitrile rubber, butyl rubber, ethylene propylene rubber, or the like can be used.
As the soft layer, natural rubber, styrene rubber, silicone rubber, a thermoplastic elastomer, or the trademark “Haplagel” manufactured by Dai-Ichi Denko KK can be used. Further, the elastic foam includes the hard layer, the medium layer,
It can be used as an elastic foam to form any of the soft layers, especially the middle or soft layers.

The third invention (the invention according to claim 3)
In the second aspect, the shock absorber may further include: a hard layer formed in a ring shape on the innermost side; a first intermediate layer formed in a ring shape on the outer side of the hard layer; 1 is characterized in that it has a ring shape outside the intermediate layer. It is characterized by having.

The fourth invention (the invention according to claim 4)
Is a lower support plate fixed to the ground side, a sphere that is rollably mounted on the lower support plate, and is supported by the sphere and is located above the lower support plate with the sphere interposed therebetween. And a ring-shaped stopper portion having the same diameter as each other and surrounding the sphere is formed on the upper surface of the lower support plate and the lower surface of the upper support plate, respectively. A ring-shaped shock absorber made of rubber or elastic foam, which surrounds the sphere and has a height longer than the radius of the sphere, is provided inside the stopper. It is characterized by being mounted so as to be movable in the radial direction.

A fifth invention (an invention according to claim 5)
In the fourth aspect, a ring-shaped elastic body is fixed to an inner peripheral surface of each of the stopper portions,
The shock absorber includes a ring-shaped shock absorber main body made of rubber, and a rod-shaped body made of lead having the same length as the height of the shock absorber main body. Are provided in a large number in the direction around the axis.

The sixth invention (the invention according to claim 6)
In the fourth invention, a ring-shaped elastic body is fixed to an inner peripheral surface of the stopper portion, and the shock absorber is an intermediate ring body made of soft rubber or elastic foam. An upper ring body having a lower surface adhered to an upper surface of the intermediate ring body, an outer peripheral surface facing an inner peripheral surface of a stopper formed on the upper support plate, and being integrally formed of a metal material; An upper surface is adhered to a lower surface of the body, an outer peripheral surface is opposed to an inner peripheral surface of a stopper portion formed on the lower support plate, and a lower ring body integrally formed of a metal material; An inner ring body having an outer peripheral surface adhered to the surface and having a height substantially equal to a length from a lower surface of the lower ring body to an upper surface of the upper ring body. It is.

According to a seventh aspect of the present invention, there is provided a seismic isolation structure for a light-weight structure, wherein the seismic isolation device according to the first to sixth aspects is provided.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a seismic isolation device according to the present invention and a seismic isolation structure of a light-weight structure provided with the seismic isolation device will be described below in detail with reference to the drawings.

First, the seismic isolation structure of a light-weight structure using the seismic isolation device according to the present invention will be briefly described, and then the seismic isolation device used in the seismic isolation structure will be described in detail. As shown in FIG. 1, this seismic isolation structure includes a square base plate B on a foundation concrete A as a ground.
Are fixed by anchor bolts (not shown), and a lower support plate 2 constituting the seismic isolation device 1 according to the first embodiment is fixed on the base plate B. An upper bearing plate 3 fixed to the lower surface of a first base, which will be described later, is provided via a sphere (not shown). That is, in the present embodiment, the seismic isolation device 1 constituting the present invention is fixed to the lower bearing plate 2 fixed to the base plate B, a sphere (not shown), and a base constituting a light weight structure. And an upper support plate 3. A concave surface is formed on the upper surface of the lower support plate 2, and a concave surface having the same shape as the concave surface is also formed on the lower surface of the upper support plate 3. On the upper surface of the upper support plate 3, an H-shaped steel S as a first base is fixed by bolts 4, 4, and 4. On the upper surface of the H-shaped rope S, a wooden base W as a second base is provided. Has been fixed. Then, a pillar (not shown) is erected on the upper surface of the wooden base W to constitute a light weight structure as a whole. Therefore, when an earthquake occurs, the foundation concrete A, the base plate B, and the lower bearing plate 2 as the ground oscillate, and a sphere (not shown) rolls with the amplitude of the lower bearing plate 2. The amplitude is not transmitted to the upper support plate 3, and
The entire lightweight structure including the type rope S, the wooden base W, and the columns (not shown) is protected from the seismic motion. In addition, in FIG. 1, although only one seismic isolation device 1 according to the above-described configuration is described, it is assumed that the seismic isolation device 1 is provided below each part where the wooden base W and the wooden base W intersect, It is assumed that the entire lightweight structure is supported by these seismic isolation devices 1.

Next, the seismic isolation device 1 according to the first embodiment will be described in detail. This seismic isolation device 1
As shown in FIGS. 2 and 3, a lower bearing plate 2 fixed to the base plate B fixed on the founder concrete A by bolts (not shown) with first to fourth bolts 5, 5, 5, 5 And a sphere 7 rotatably mounted on the upper surface of the lower support plate 2 and a first sphere 7 constituting a lightweight structure.
An upper support plate 3 having an upper surface fixed to the lower surface of an H-shaped steel S as a base and supported by the sphere 7;
It has.

The lower support plate 2 is formed of iron into a square shape having a side length of approximately 400 mm.
At the corner, an insertion hole (reference numeral is omitted) through which the first to fourth bolts 5, 5, 5, 5 are inserted is formed.
One stopper 6 is fixed to the upper surface of the lower support plate 2 so as to surround the sphere 7. The one stopper portion 6 is a member for preventing the sphere 7 from falling off from the upper surface of the lower support plate 2 when the foundation concrete A as the ground sways left and right during an earthquake, As shown in FIG. 2, it is formed into a ring shape by iron, and is fitted in arc-shaped grooves 2a formed inside four corners of the upper surface of the lower support plate 2, respectively. Also,
The one stopper 6 is not completely provided on the upper surface of the lower support plate 2, but is partially formed so as to overhang from the upper surface of the lower support plate 2.

Further, one shock absorber 8 constituting the present invention is adhered to the inner peripheral surface of the one stopper portion 6. This one shock absorber 8 causes the amplitude stroke of the lower support plate 2 to reach the maximum allowable range in the event of an earthquake, and the sphere 7 directly collides with the one stopper 6 to generate a large impact sound and vibration. As shown in FIG. 2, the entire shape is formed in a ring shape, and each is formed in a ring shape, and four layers of rubber having different hardness are laminated. It is molded, and the hardness of this rubber is the highest hardness,
It is classified into three types: soft, which has the lowest hardness, and medium, which is an intermediate hardness between the hard and soft. That is, as shown in FIG. 3, the one shock absorber 7 includes a first intermediate rubber 9 having an outer peripheral surface bonded to an inner peripheral surface of the one stopper portion 6 and formed into a ring shape. A first soft rubber 10 which is also formed in a ring shape and has an outer peripheral surface adhered to an inner peripheral surface of the first intermediate rubber 9 and has a lower hardness than the first intermediate rubber 9. A second intermediate rubber 11 having an outer peripheral surface adhered to the inner peripheral surface of the first soft rubber 10 and formed into a ring shape; and a second intermediate rubber 11 similarly formed into a ring shape. A first hard rubber 12 having an outer peripheral surface adhered to an inner peripheral surface of the rubber 11 and having a higher hardness than the first and second intermediate rubbers 9 and 11. The first and second intermediate rubbers 9, 11 are:
It is an intermediate layer constituting the present invention. Further, the first soft rubber 10 is a soft layer constituting the present invention, and the first hard rubber 12 is a hard layer constituting the present invention.

The spherical body 7 is placed on the upper surface of the lower support plate 2 and inside the one shock absorber 8. The sphere 7 is formed of iron, and when the foundation concrete A as the ground shakes in the horizontal direction during an earthquake, the sphere 7 rolls on the upper surface of the lower support plate 2 and the wooden base as the second base. The seismic motion is not transmitted to a light-weight structure such as a detached house (not shown) formed on the upper surface of W.

Next, the upper support plate 3 will be described. The upper support plate 3 is supported by the spherical body 6 and has an upper surface fixed to the H-shaped steel S by bolts 4, 4, 4. The upper support plate 3 is formed of iron in a square shape having a side of 400 mm, similarly to the lower support plate 2. As shown in FIG. 3, the lower surface of the upper support plate 3 is restored to its original position when the earthquake is over.
a. Then, 4 on the lower surface of the upper support plate 3
An arc-shaped groove 3b is formed inside the corner, similarly to the lower support plate 2, and the other stopper 13 is fitted in the groove 3b. This other stopper 13
As in the case of the above-mentioned one stopper portion 6, it is formed in a ring shape by iron, is not completely provided inside the lower surface of the upper support plate 3, and partially overhangs from the lower surface of the upper support plate 3. It is formed in a state.

The other shock absorber 14 is bonded to the inner peripheral surface of the other stopper 13. Like the one shock absorber 8, the other shock absorber 14 allows the amplitude stroke of the lower support plate 2 to reach the maximum allowable range in the event of an earthquake, and the sphere 7 moves to the other stopper portion 1.
This is a member to prevent the generation of loud impact noise and vibration by directly colliding with No.3, and is formed into a ring shape and laminated with four layers of hard, medium, and soft rubbers of three kinds of hardness. It is formed by this. That is, as shown in FIG. 3, the other shock absorber 14 includes a third intermediate rubber 15 having an outer peripheral surface bonded to an inner peripheral surface of the other stopper portion 13 and formed into a ring shape. The first soft rubber 1 is also formed in a ring shape and has an outer peripheral surface adhered to an inner peripheral surface of the third intermediate rubber 15.
A second soft rubber 16 having the same hardness as 0, a fourth middle rubber 17 formed in a ring shape by bonding an outer circumferential surface to an inner circumferential surface of the second soft rubber 16, and a ring The first hard rubber 12 has an outer peripheral surface bonded to an inner peripheral surface of the fourth intermediate rubber 17.
And a second hard rubber 18 molded to the same hardness as the second hard rubber 18. The third and fourth intermediate rubbers 1
Reference numerals 5 and 17 denote first intermediate layers constituting the present invention. The soft rubber 16 is a soft layer constituting the present invention, and the hard rubber 18 is a hard layer constituting the present invention.

The first and second soft rubbers 10,
16 shows that the lower bearing plate 2 swings right and left due to the seismic motion, and the sphere 7 rolls on the upper surface of the lower bearing plate 2.
When the sphere 7 rolls until it hits the above-mentioned one and the other shock absorbers 8 and 14 and is pressed from the left and right by the one and the other shock absorbers 8 and 14, The first and fourth intermediate rubbers 9, 11, 15, and 17 are compressed layers.
This layer is compressed when the compression width of 0, 16 almost reaches the limit. Further, the first and second hard rubbers 12, 18
Are the compression widths of the first and second soft rubbers 10 and 16 and the first to fourth intermediate rubbers 9, 11, 15 and 17.
The compression width of the first and second hard rubbers 12 and 18 is a layer that is compressed when the compression width of the rubber hardly reaches the limit.
The compression width is very small as compared with the compression width of the first to fourth intermediate rubbers 9, 11, 15, and 17, and is set to such a hardness that almost no compression is possible. Further, the spherical body 7 is provided inside the one and other shock absorbers 8 and 14.
Can roll freely in almost 300 directions in all directions.
The distance obtained by adding the compression width of the one and other shock absorbers 8 and 14 to the 300 mm is the displacement amount at which the spherical body 7 can roll.

Next, the operation and effect of the seismic isolation device 1 will be described. A line graph 19 shown in FIG. 5 is a graph showing the relationship between the displacement of the sphere 7 and the load due to the seismic motion. The vertical axis P indicates the sphere 7 and the structure placed on the sphere 7. This load is shown, and the horizontal axis δ shows the amount of displacement of the sphere 7. The polygonal line 20 is a polygonal line indicating a load applied to a structure such as the spherical body 7 and the upper support plate 3 placed on the spherical body 7 with respect to the displacement amount of the spherical body 7. When an earthquake occurs, the foundation concrete A, the base plate B, and the lower support plate 2 as the ground oscillate. In the case of the seismic isolation device 1 according to the first embodiment, when the amplitude stroke is within 300 mm on both the left and right sides, the sphere 7 rolls with the amplitude of the lower support plate 2. It is not transmitted to the upper support plate 3, and as a result, the entire lightweight structure including the H-shaped rope S, the wooden base W, and the columns (not shown) is protected from the seismic motion. This state is the range of A shown in the line graph 19, and the line 2
0 rises rapidly with the occurrence of the earthquake,
Are freely rolling in the range of 300 mm in the left and right directions, the load applied to the sphere 7 and the structure mounted on the sphere 7 is kept constant at a low value.

The amplitude stroke of the lower support plate 2 due to the earthquake is large, and the range in which the sphere 7 rolls is 3
In the case of a ground motion exceeding 00 mm, as shown in FIG.
4 and is pressed from both sides by the one and the other shock absorbers 8 and 14. However, since the sphere 7 is formed of iron, it does not deform even when pressed by the one and the other shock absorbers 8 and 14, and the one and the other shock absorbers 8 and 14 are not deformed.
Is compressed from the inside, thereby absorbing the shock transmitted to the sphere 7 and the structure placed on the sphere 7.
For example, when the lower support plate 2 oscillates rightward in FIG. 4, the other shock absorber 1
4 is compressed from the inside, and the one shock absorber 8 is compressed from the inside by the lower part of the sphere 7. In this case, first, the first and second soft rubbers 10 and 16 constituting the one and the other shock absorbers 8 and 14 are first compressed. This state is the state A shown in the line graph 19, and the line 20 rises relatively slowly,
Since the first and second soft rubbers 10 and 16 serve as a cushioning material and absorb shock, the load applied to the sphere 7 and the structure placed on the sphere 7 is free. It does not increase so much even when compared to a state in which it can roll.

The amplitude stroke of the sphere 7 due to the seismic motion is further increased, and the first and second soft rubbers 10, 1
When the compression width of 6 reaches almost the limit, in addition to the first and second soft rubbers 10 and 16, the first to fourth intermediate rubbers 9, 11, 15, and 17 are compressed. This state is the state of C shown in the line graph 19, and in addition to the load when the first and second soft rubbers 10 and 16 are compressed, the first to fourth intermediate rubbers 9, 11, 15, 17
Is added because the load at the time of compression is added.
Rises to almost twice the angle in the state of (1). Even in this state, the first to fourth
Since the intermediate rubbers 9, 11, 15, 17 serve as shock absorbing materials to absorb shocks, the sphere 7 and the structure mounted on the sphere 7 are sufficiently protected from seismic motion. .

The amplitude stroke of the sphere 7 due to the seismic motion is further larger than in the above state, and the first and second soft rubbers 10 and 16 and the first to fourth middle rubbers 9 and 1 are used.
When the compression width of 1, 15, 17 reaches almost the limit, in addition to these, the first and second hard rubbers 12, 18 are compressed, but the first and second hard rubbers 12, 18 are compressed. 1
As described above, the compression width of line 8 is very small and has little effect as a cushioning material.
0 sharply rises from the state of c and becomes almost vertical. Therefore, the load applied to the spherical body 7 and the structure placed on the spherical body 7 rises rapidly. That is, if the amplitude stroke of the sphere 7 due to the seismic motion is within the range of A, A, and C shown in the line graph 19, the seismic isolation device 1 rolls the sphere 7 and the one and other impacts. Due to the compressing action of the absorbers 8 and 14, a sufficient seismic isolation effect can be exerted on the structure placed on the sphere 7.

Therefore, according to the seismic isolation device 1, an extremely good seismic isolation effect can be exhibited by the rolling operation of the sphere 7. Further, even if the seismic motion is strong and the amplitude stroke of the lower bearing plate 2 is large and exceeds the range in which the sphere 7 can roll freely, the upper surface of the lower bearing plate 2 constituting the seismic isolation device 1 has The upper bearing plate 3, which also constitutes the seismic isolation device 1, is formed.
Since the other stopper portion 13 is formed on the lower surface of the base member 7, it is possible to effectively prevent the risk that the sphere 7 falls off from the lower support plate 2 to the outside. Further, since the one and other shock absorbers 8 and 14 are adhered to the inner peripheral surfaces of the one and other stopper portions 6 and 13, the one and other shock absorbers 8 and 14 are compressed. This not only makes it possible to extremely effectively reduce the impact and the impact sound transmitted to the structure mounted on the sphere 7, but also separates the damper and the like as in the conventional seismic isolation structure. Since it is not necessary to perform the construction, the construction cost can be greatly reduced, and it can be provided to the purchaser at a low price.

Next, the seismic isolation device 30 according to the second embodiment
Will be described. This seismic isolation device 30 is shown in FIGS.
As shown in FIG. 7, a lower support plate 31 fixed on a base plate B, a sphere 32 rotatably mounted on the upper surface of the lower support plate 31, and an upper portion supported by the sphere 32 And a support plate 33.

The lower support plate 31 is formed of iron in a substantially square shape, and has four corners through which first to fourth bolts 34, 34, 34, 34 are inserted (reference numerals are omitted). ) Is formed. And the lower support plate 3
1 is provided with a stopper 3 so as to surround the spherical body 32.
5 is fixed. The one stopper portion 35 is formed in a ring shape from iron, and is fitted in a circular groove portion 31 a formed on the upper surface of the lower support plate 2.

A shock absorber 36 constituting the present invention is adhered to the inner peripheral surface of the stopper 35. As shown in FIG. 7, the shock absorber 36 is similar to the one and the other shock absorber spheres 8 and 14 described in the seismic isolation device 1 according to the first embodiment. A first intermediate rubber 37 having an outer peripheral surface adhered to the inner peripheral surface and formed in a ring shape; and an outer peripheral surface formed on the inner peripheral surface of the first intermediate rubber 37 similarly formed in a ring shape. A soft rubber 38 having a hardness lower than that of the first medium rubber 37 and a second medium formed in a ring shape by bonding an outer peripheral surface to an inner peripheral surface of the soft rubber 38. The rubber 38 is also formed into a ring shape and has an outer peripheral surface adhered to the inner peripheral surface of the second intermediate rubber 38 to have a hardness higher than that of the first and second intermediate rubbers 37 and 39. And high hard rubber 40.

On the upper surface of the lower bearing plate 31 and inside the shock absorber 36, the sphere 32 similar to the sphere 7 described in the seismic isolation device 1 according to the first embodiment is provided. It is placed. The upper support plate 33 is
The upper surface is supported by the sphere 32 and is fixed to the H-shaped steel S by a bolt (not shown). In addition, the lower surface of the upper support plate 33 is formed in a conical shape as shown in FIG. 7 in order to restore the light-weight structure to its original position when the earthquake ends. Also in the seismic isolation device 30 according to the second embodiment, the structure can be effectively protected from vibration and impact due to an earthquake, similarly to the seismic isolation device 1 according to the first embodiment. In particular, this seismic isolation device 3
Since the number 0 is small in number of parts, the construction period can be shortened, and it can be provided at a lower price.

Next, the seismic isolation device 5 according to the third embodiment is described.
0 will be described. As shown in FIG. 8, the seismic isolation device 50 includes a lower support plate 51, a sphere 52 rollably mounted on the upper surface of the lower support plate 51,
And a first shock absorber 54 mounted on the upper surface of the lower support plate 51 so as to surround the sphere 52.

The lower support plate 51 is formed of iron into a substantially square shape, and the first to fourth bolts 55, 55, 55 (the fourth bolt is not shown) are provided at four corners. An insertion hole (symbol is omitted) to be inserted is formed. On the upper surface of the lower support plate 51, one stopper portion 5 is provided so as to surround the first shock absorber 54.
6 is fixed. The one stopper 56 is formed into a ring shape by iron, and is fitted in a circular groove 51a formed on the upper surface of the lower support plate 51 as shown in FIG.

A second shock absorber 57 is adhered to the inner peripheral surface of the one stopper 56. Note that the second shock absorber 57 is an elastic body according to the present invention. The second shock absorber 57 is formed in a ring shape from rubber, and the outer peripheral surface is bonded to the inner peripheral surface of the one stopper portion 56.

On the upper surface of the lower support plate 51 and inside the second shock absorber 57, a first shock absorber 54 is mounted so as to be movable in the horizontal direction. The first shock absorber 54 is integrally formed of rubber into a ring shape. The spherical body 52 is provided on the upper surface of the lower bearing plate 51 and inside the first shock absorber 54.
Are mounted so as to be able to roll. The upper bearing plate 53 is supported on the sphere 52. The upper support plate 53 is formed in a substantially square shape by iron, similarly to the lower support plate 51. On the lower surface, when the earthquake ends, the light weight structure is restored to its original position. As shown in FIG. 9, a conical concave surface 53a is formed. An arc-shaped groove 53b is formed on the lower surface of the upper support plate 3 similarly to the lower support plate 51, and the other stopper 58 is fitted in the groove 53b.

A third shock absorber 59 is adhered to the inner peripheral surface of the other stopper portion 58. The third shock absorber 59 is formed in a ring shape from rubber, similarly to the second shock absorber 57, and the outer peripheral surface is bonded to the inner peripheral surface of the other stopper portion 58. . The second and third shock absorbers 57, 59
As shown in FIG. 11, a soft rubber 60 is formed in a ring shape by bonding the outer circumferential surface to the inner circumferential surfaces of the one and other stopper portions 56 and 58, and is also formed in a ring shape. In addition, the outer peripheral surface may be bonded to the inner peripheral surface of the soft rubber 60, and may be formed from a hard rubber 61 having a higher hardness than the soft rubber 60.

Next, the function and effect of the seismic isolation device 50 will be described. When an earthquake occurs, the lower bearing plate 51 swings, and with this amplitude, the sphere 52 rolls on the lower bearing plate 51 and the first shock absorber 54 moves to the lower bearing plate 51. Slide on 51. This allows
The seismic motion is not transmitted to the structure supported by the sphere 52, and the structure is protected from the seismic motion. When the earthquake is strong and the amplitude stroke of the lower support plate 51 exceeds the range in which the sphere 52 and the first shock absorber 54 can freely move on the lower support plate 51, the first shock absorber 54 The lower part of the outer peripheral surface of the
6, the upper portion of the outer peripheral surface of the first shock absorber 54 is pressed against the other stopper 58, and the sphere 52 is also pressed by the first shock absorber 5.
4 is pressed by the inner peripheral surface. The second and third shock absorbers 57 and 59 made of rubber are adhered to the inner peripheral surfaces of the one and other stopper portions 56 and 58, respectively.
Since the first shock absorber 54 is also formed of rubber, the first shock absorber 54 is twisted in the horizontal direction and the second and third shock absorbers as shown in FIG. 57 and 59 are also compressed and absorb the impact. As a result, the structure supported by the sphere 52 is not transmitted with the impact of the earthquake, and is sufficiently protected from a large earthquake motion.

Therefore, according to the seismic isolation device 50,
An extremely good seismic isolation effect can be exhibited by the rolling operation of the spherical body 52. Further, even if the seismic motion is strong and the amplitude stroke of the lower bearing plate 51 is large and exceeds the range in which the sphere 52 can roll freely, the upper surface of the lower bearing plate 51 constituting the seismic isolation device 50 has The other stopper portion 60 is formed on the lower surface of the upper support plate 53 which also forms the seismic isolation device 50.
Is formed, the sphere 52 is attached to the lower support plate 51.
It is possible to effectively prevent danger such as falling off from above. Further, the first shock absorber 54 is mounted on the lower bearing plate 51 so as to surround the sphere 52, and the inner peripheral surfaces of the one and other stopper portions 56 and 58 are provided with Since the second and third shock absorbers 57 and 59 are adhered to each other, even when the seismic motion is strong and the amplitude stroke of the lower support plate 51 is large, the first to third shock absorbers are bonded.
The shock absorbers 54, 57, and 59 are compressed to absorb the shock, so that the shock absorbers 54, 57, and 59 are placed on the spherical body 52 in the same manner as the seismic isolation devices 1 and 30 described in the second and third embodiments. Impact and impact noise transmitted to the existing structure can be extremely effectively mitigated, and there is no need to separately install dampers, etc., so construction costs can be greatly reduced and purchases at low prices It can be provided to people.

The first shock absorber 54 described in the seismic isolation device 50 described in the third embodiment is formed integrally with rubber, but the shock absorber according to the present invention is It is not limited to the above embodiment. For example,
As shown in FIG. 12, the shock absorber 70 includes a hard rubber 71 formed in a ring shape, and a soft rubber 72 formed on the inner peripheral surface of the hard rubber 71 and also formed in a ring shape. It has been done. Further, as shown in FIG. 13, the shock absorber 80 includes a first hard rubber 81.
And a soft rubber 82 formed on the upper surface of the first hard rubber 81, and a second hard rubber 83 formed on the upper surface of the soft rubber 82. Note that a gel-like substance may be used instead of the soft rubber 82. The shock absorber 90 is formed of rubber in a ring shape. As shown in FIG. 14, a large number of one groove portions 90a are formed on the upper surface in the direction around the axis, and the lower surface is formed on the lower surface. Has a groove 90b formed at a position corresponding to the groove 90a.

As shown in FIG. 15, the shock absorber 100 has one flat plate portion 101 made of rubber and formed into a ring shape, and a plurality of the shock absorbers 100 stand in the direction around the axis on the upper surface of the one flat plate portion 101. Upright plate portion 102 formed of rubber and formed into a square shape by rubber;
2 is formed on the upper surface of the one flat plate portion 1 by rubber.
01 and the other flat plate portion 103 formed in the same shape and size. The upright plate 1
Instead of forming a large number of 02, an upright plate portion is formed continuously between the one and the other flat plate portions 101, 103 in a direction around the axis of the one and the other flat plate portions 101, 103 in a wavy manner. Is also good. In addition, the shock absorber 200 is provided in FIG.
As shown in FIG. 3, a shock absorber main body 201 formed into a ring shape by rubber, and a number of rod-like bodies 20 made of lead formed to the same length as the height of the shock absorber main body 201.
The plurality of rod-shaped bodies 202 are disposed in a large number of through-holes (not shown) formed in a large number in the direction around the axis of the shock absorber main body 201. In particular, this shock absorber 200 is formed only of rubber because the many rod-like bodies 202 arranged in the direction around the axis of the shock absorber main body 201 effectively absorb vibrations and shocks caused by an earthquake. A higher vibration damping effect can be realized as compared with the shock absorber that has been used.

Next, the seismic isolation device 30 according to the fourth embodiment is described.
0 will be described. As shown in FIGS. 17 and 18, the seismic isolation device 300 includes a lower lower support plate 301 and a spherical body 30 mounted on the upper surface of the lower lower support plate 301.
2 and the lower support plate 301 so as to surround the sphere 302.
A first shock absorber 303 mounted thereon and an upper support plate 304 supported on the sphere 302 are provided.

The lower support plate 301 has a bottom portion 301a formed substantially in a disk shape, and one stopper portion 301b rising from the periphery of the bottom portion 301a. Then, a second shock absorber 305 is adhered to the inner peripheral surface of the one stopper portion 301b.
The second shock absorber 305 has the same height as the upper surface of the one stopper portion 301b, and is formed of a medium rubber into a ring shape. Then, the lower support plate 301
The sphere 302 is rollably mounted on the upper surface of the, and the upper bearing plate 304 is supported on the sphere 302. The upper support plate 304 includes an upper plate 304a formed in a disk shape, and another stopper portion 304b hanging down from a peripheral edge of the upper plate 304a. On the inner peripheral surface of the other stopper portion 304b, a third
Are bonded. The third shock absorber 306 has the same height as the lower surface of the stopper 304b and is formed of a medium rubber into a ring shape.

On the upper surface of the lower support plate 301,
The first shock absorber 30 surrounds the sphere 302.
3 is movably mounted on the lower support plate 301. The first shock absorber 303 includes an intermediate ring body 307 formed of rubber,
7 is provided with an upper ring body 308 having a lower surface adhered to the upper surface and integrally formed of iron, and a lower ring body 309 having an upper surface adhered to the lower surface of the intermediate ring body 307 and integrally formed of iron. ing. The upper ring body 30
8 is formed at the same height as the third shock absorber 306, and the lower ring body 309 is formed at the same height as the second shock absorber 305. The inner ring 310 is bonded to the inner peripheral surface of the intermediate ring 307. This inner ring body 310
Is formed of hard rubber, and the outer peripheral surface is bonded to the inner peripheral surface of the intermediate ring body 307. The height of the inner ring 310 is substantially equal to the length from the lower surface of the lower ring 309 to the upper surface of the upper ring 308.

In the seismic isolation device 300 having the above-described configuration,
The structure supported by the sphere 302 is protected from seismic motion, and even if the seismic motion is strong and the amplitude stroke of the lower support plate 301 is large, as shown in FIG. The bodies 305 and 306 are compressed to absorb the seismic motion, and the first shock absorber 3
Intermediate ring body 307 and inner ring body 3 that constitutes the third ring
10 expands to absorb the seismic motion. Therefore, even in the case of an earthquake motion in which the amplitude stroke of the lower support plate 301 is maximized, a large impact or impact sound is not transmitted to the structure, and the user can live with peace of mind.

The first and second shock absorbers 8 and 14 according to the first embodiment are formed by laminating three kinds of rubbers having different hardnesses of soft, medium and hard in the radial direction. However, it is not always necessary to laminate three types, and for example, two types of rubber, medium and hard, may be laminated, or integral molding of only medium may be used. Further, each of the shock absorbers described in the seismic isolation device according to each of the above embodiments is formed of rubber, but an elastic foam such as urethane may be used.

[0047]

As is clear from the above description of the seismic isolation device according to each embodiment of the present invention, first, in the seismic isolation device according to the first invention (the invention according to claim 1), an earthquake When the lower support plate oscillates, the sphere rolls on the lower support plate, so that the seismic motion is not transmitted to the structure supported by the sphere, and the structure is effectively protected from earthquake. Is done. In addition, since a ring-shaped stopper portion surrounding the sphere is formed on the upper surface of the lower support plate and / or the lower surface of the upper support plate, even if the amplitude stroke of the lower support plate is large, the lower stopper plate may be used. There is no danger of the sphere falling off the lower bearing plate. Further, since the ring-shaped shock absorber is adhered to the inner peripheral surface of the stopper, the amplitude stroke of the lower support plate is large, and even if the stopper collides with the sphere, the shock absorber is not affected. Since the body acts as a cushioning material to absorb the shock, a large shock or impact sound is not transmitted to the structure supported by the sphere, and sufficient seismic isolation performance can be exhibited.

Further, the second invention (the invention according to claim 2)
In the seismic isolation device according to the above, the shock absorber is formed by laminating three types of rubbers or elastic foams having different hardnesses of hard, medium and soft in any order, so that the amplitude of the lower support plate is reduced. Since the layer corresponding to the strength absorbs the shock, it becomes possible to more effectively absorb the shock as compared with the case where the shock absorber is integrally formed.

The third invention (the invention according to claim 3)
In the seismic isolation device according to the above, the shock absorber is composed of the first medium layer and the second medium layer.
Since the intermediate layer is formed by sandwiching the soft layer, an extremely effective vibration damping effect can be obtained even for a ground motion in which the amplitude of the lower bearing plate is extremely large.

The fourth invention (the invention according to claim 4)
In the seismic isolation device according to the above, the ring-shaped shock absorber movably mounted inside the stopper portion serves as a cushioning material to absorb the shock, so that the lower support plate has a large amplitude stroke. However, a large impact or impact noise is not transmitted to the structure supported by the sphere, and extremely high seismic isolation performance can be exhibited.

The fifth invention (the invention according to claim 5)
In the seismic isolation device according to (1), since a large number of lead-like rods are arranged in the shock absorber main body constituting the shock absorber in a direction around the axis of the shock absorber main body, the shock absorber is More effective vibration absorption performance can be obtained as compared with the case of molding only with rubber or an elastic foam. Further, since the ring-shaped elastic body is bonded to the inner peripheral surface of the stopper portion, it is possible to realize a very high vibration absorbing performance in combination with the above-mentioned shock absorber.

The sixth invention (the invention according to claim 6)
In the seismic isolation device according to the above, the elastic body bonded to the inner peripheral surface of the stopper portion is compressed to absorb the seismic motion, and the intermediate ring body and the inner ring body constituting the shock absorber expand to absorb the seismic motion. Therefore, even in the case of an earthquake motion in which the amplitude stroke of the lower bearing plate is maximized, a large impact or impact sound is not transmitted to the structure, and an extremely high seismic isolation effect can be obtained.

The seventh invention (the invention according to claim 7)
In the seismic isolation structure according to the present invention, the rolling of the sphere provides a very good seismic isolation effect, and the shock absorber exerts a very good vibration damping effect even for earthquake motion having a large amplitude stroke. The shock and impact noise due to the earthquake are not transmitted to the structure supported by the vehicle.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seismic isolation structure using a seismic isolation device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a lower support plate included in the seismic isolation device according to the first embodiment.

FIG. 3 is a side sectional view showing the seismic isolation device according to the first embodiment.

FIG. 4 is a side cross-sectional view showing a state where a lower support plate is oscillated and a shock absorber is compressed.

FIG. 5 is a graph showing a relationship between a displacement amount of a sphere due to a seismic motion of the seismic isolation device according to the first embodiment and a load applied to the sphere.

FIG. 6 is a plan view showing a lower support plate constituting the seismic isolation device according to the second embodiment.

FIG. 7 is a side sectional view showing a seismic isolation device according to a second embodiment.

FIG. 8 is an exploded perspective view showing a seismic isolation device according to a third embodiment.

FIG. 9 is a side sectional view showing a seismic isolation device according to a third embodiment.

FIG. 10 is a side sectional view showing a state in which the lower support plate is oscillated and the shock absorber is compressed.

FIG. 11 is a side sectional view showing another form of the second and third shock absorbers constituting the seismic isolation device according to the third embodiment.

FIG. 12 is a side sectional view showing another form of the first shock absorber constituting the seismic isolation device according to the third embodiment.

FIG. 13 is a side sectional view showing another form of the first shock absorber constituting the seismic isolation device according to the third embodiment.

FIG. 14 is a side sectional view showing another form of the first shock absorber constituting the seismic isolation device according to the third embodiment.

FIG. 15 is a side sectional view showing another form of the first shock absorber constituting the seismic isolation device according to the third embodiment.

FIG. 16 is a side sectional view showing another form of the first shock absorber constituting the seismic isolation device according to the third embodiment.

FIG. 17 is a side sectional view showing a first shock absorber constituting a seismic isolation device according to a fourth embodiment.

FIG. 18 shows a state in which the lower support plate is oscillated, the second and third shock absorbers are compressed, and the intermediate ring body and the inner ring body constituting the first shock absorber are extended. It is a side sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismic isolation device 2 Lower support plate 3 Upper support plate 6 One stopper part 7 Sphere 8 One shock absorber 9 First medium rubber 10 First soft rubber 11 Second medium rubber 12 First hard Rubber 13 The other stopper portion 14 The other shock absorber 15 Third medium rubber 16 Second soft rubber 17 Fourth medium rubber 18 Second hard rubber 30 Seismic isolation device 31 Lower support plate 32 Sphere 33 Upper Bearing plate 35 Stopper portion 36 Shock absorber 37 Intermediate rubber 38 Soft rubber 39 Intermediate rubber 40 Hard rubber 50 Seismic isolation device 51 Lower support plate 52 Spherical body 53 Upper support plate 54 First shock absorber 56 One stopper portion 57 Second shock absorber 58 The other stopper 59 Third shock absorber 70 Shock absorber 80 Shock absorber 90 Shock absorber 100 Shock absorber 200 Shock absorber 300 301 lower bearing plate 302 sphere 303 first shock absorber 304 upper support plate 305 second shock absorber 306 third shock absorber 307 intermediate ring member 308 top ring body 309 lower ring 310 inner ring member

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[Procedure amendment]

[Submission date] May 12, 1999 (1999.5.1
2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

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[Claims]

[Procedure amendment 2]

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[Correction target item name] 0006

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[0006]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and has first and second aspects.
Akira is a seismic isolation device, and the third invention is a seismic isolation structure of a light weight structure. Therefore, the first invention (the invention described in claim 1) includes a lower support plate fixed to the ground, a sphere rollably mounted on the lower support plate, and a sphere supported by the sphere. And an upper support plate fixed above the lower support plate with the sphere interposed therebetween, and an upper surface of the lower support plate and / or a lower surface of the upper support plate, stopper ring-shaped surrounding the spheres is formed on the inner circumferential surface of the stopper portion, that Do outer peripheral surface of the ring-shaped shock absorber made of rubber or elastic foam is bonded together surround the sphere With this shock absorption
The body has a hard layer formed in the innermost ring shape and this
A first intermediate layer formed into a ring outside the hard layer;
A soft layer formed in a ring shape outside the first intermediate layer
And a second inner ring formed outside the soft layer.
And a material layer .

[Procedure amendment 3]

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[Correction target item name] 0008

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[0008] The hard material constituting the first invention is
Layer, intermediate layer, and soft layer are made of the rubber or foamed elastic material described above.
From among the three materials with different hardness are extracted as appropriate,
Material from the innermost layer of the shock absorber, the first medium
A layer, a soft layer, and a second intermediate layer may be stacked in this order. Soshi
As the rubber that can be used as the hard layer,
The hardness of the rubber or elastic foam used for the soft and soft layers
Is relatively determined by the relationship of
Use tongue rubber, acrylic rubber, fluorine rubber, etc.
Can be. Further, as the first and second intermediate layers,
For example, nitrile rubber, butyl rubber, ethylene propylene
Rubber, etc. can be used.
Rubber, styrene rubber, silicone rubber or thermoplastic rubber
The trademark “Hap” related to the production of Lastmer and Daiichi Denko
Lagel "can also be used. In addition, the elastic foam
The body consists of this hard layer, the (first and second) middle layer, the soft layer
Any, particularly an elastic foam forming a middle layer or a soft layer
Can be used as

[Procedure amendment 4]

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A second invention (an invention according to claim 2) includes a lower support plate fixed to the ground and a lower support plate.
A sphere that is rollably mounted on a backing plate and this sphere
Supported above the lower support plate with the sphere interposed therebetween.
And a fixed upper support plate.
The upper surface of the lower support plate and the lower surface of the upper support plate
A ring-shaped stopper that has the same diameter and surrounds the sphere
Each of these stoppers has an inner peripheral surface
A ring-shaped elastic body is fixed, and
Inside the sphere, surround the sphere and measure the radius of the sphere
A ring-shaped shock absorber with a longer height than
Is mounted so as to be movable in the radial direction of the stopper.
This shock absorber is made of soft rubber or elastic foam.
Intermediate ring body, and the lower surface on the upper surface of this intermediate ring body
The outer peripheral surface is bonded to the stopper formed on the upper support plate.
Facing the inner circumferential surface of the
Upper ring and the lower part of the intermediate ring
The surface is adhered and the outer peripheral surface is a strike formed on the lower support plate.
The ring faces the inner peripheral surface of the
Lower ring body formed and inner circumference of the intermediate ring body
The outer surface is bonded to the surface, and the height is the lower part
Measure the length from the lower surface of the ring to the upper surface of the upper ring.
And an inner ring body that is equalized.
It is characterized by the following.

[Procedure amendment 5]

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[0010] The third invention (the invention according to claim 4).
Akira) is a seismic isolation structure for a light weight structure,
Specifies that the seismic isolation device according to the second invention is provided.
It is a sign.

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Next , a seismic isolation device 300 according to a second embodiment will be described. The seismic isolation device 300, FIG. 8
And FIG. 9, the lower portion bearing plate 301, the spherical body 302 made is placed on the upper surface of the lower support plate 301, it is placed on the lower support plate 301 so as to surround the spheres 302 A first shock absorber 303 and an upper support plate 304 supported on the spherical body 302.

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[0045] Even seismic isolation device 300 according to the above-described configuration, the structure that is supported by the spherical body 302 is protected from seismic motion, even when ground motion is strong amplitude stroke of the lower support plate 301 is large, FIG. 9 As shown in FIG. 5, the second and third shock absorbers 305 and 306 are compressed to absorb the seismic motion, and the intermediate ring body 307 and the inner ring body 310 constituting the first shock absorber 303 are extended. To absorb the ground motion. Therefore, even in the case of an earthquake motion in which the amplitude stroke of the lower support plate 301 is maximized, a large impact or impact sound is not transmitted to the structure, and the user can live with peace of mind.

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[0047]

As is clear from the above description of the seismic isolation device according to each embodiment of the present invention, first, in the seismic isolation device according to the first invention (the invention according to claim 1), an earthquake When the lower support plate oscillates, the sphere rolls on the lower support plate, so that the seismic motion is not transmitted to the structure supported by the sphere, and the structure is effectively protected from earthquake. Is done. In addition, since a ring-shaped stopper portion surrounding the sphere is formed on the upper surface of the lower support plate and / or the lower surface of the upper support plate, even if the amplitude stroke of the lower support plate is large, the lower stopper plate may be used. There is no danger of the sphere falling off the lower bearing plate. Further, since the ring-shaped shock absorber is adhered to the inner peripheral surface of the stopper, the amplitude stroke of the lower support plate is large, and even if the stopper collides with the sphere, the shock absorber is not affected. Since the body acts as a cushioning material to absorb the shock, a large shock or impact sound is not transmitted to the structure supported by the sphere, and sufficient seismic isolation performance can be exhibited. In addition,
In Ming, the shock absorber is composed of a first intermediate layer and a second intermediate layer.
The lower support plate is formed by sandwiching the soft layer.
Extremely large ground motions
An effective vibration damping effect can be obtained.

[Procedure amendment 23]

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[Correction method] Change

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In the seismic isolation device according to the second invention (the invention according to claim 2), the seismic isolation device is bonded to the inner peripheral surface of the stopper portion.
The elastic body is compressed to absorb the seismic motion,
The intermediate ring body and inner ring body that constitute the body
Because it absorbs the seismic motion, the amplitude
Even if the ground motion is the largest,
Extremely high seismic isolation effect without transmission of shocks and impact sounds
be able to.

[Procedure amendment 24]

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[Correction method] Change

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Further, in the seismic isolation structure according to the third invention (the invention according to claim 3), the rolling of the sphere causes an extreme
Good seismic isolation effect and the shock absorber
Is extremely good for ground motion with large amplitude stroke
A structure supported by a sphere because it exhibits a strong vibration damping effect
There is no transmission of shock or impact noise due to the earthquake.

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[Brief description of the drawings]

FIG. 1 is a perspective view showing a seismic isolation structure using a seismic isolation device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a lower support plate included in the seismic isolation device according to the first embodiment.

FIG. 3 is a side sectional view showing the seismic isolation device according to the first embodiment. FIG.

FIG. 4 is a side cross-sectional view showing a state where a lower support plate is oscillated and a shock absorber is compressed.

FIG. 5 is a graph showing a relationship between a displacement amount of a sphere due to a seismic motion of the seismic isolation device according to the first embodiment and a load applied to the sphere.

FIG. 6 is a plan view showing a lower support plate constituting the seismic isolation device according to the second embodiment.

FIG. 7 is a side sectional view showing a seismic isolation device according to a second embodiment.

FIG. 8 is a side sectional view showing a first shock absorber constituting a seismic isolation device according to a third embodiment.

FIG. 9 shows a state in which the lower support plate is oscillated, the second and third shock absorbers are compressed, and the intermediate ring body and the inner ring body constituting the first shock absorber are extended. It is a side sectional view.

[Procedure amendment 30]

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[Description of Signs] 1 Seismic isolation device 2 Lower support plate 3 Upper support plate 6 One stopper portion 7 Sphere 8 One shock absorber 9 First medium rubber 10 First soft rubber 11 Second medium rubber 12 First Hard Rubber 13 Other Stopper 14 Other Shock Absorber 15 Third Medium Rubber 16 Second Soft Rubber 17 Fourth Medium Rubber 18 Second Hard Rubber 30 Seismic Isolation Device 31 Lower Bearing Plate 32 sphere 33 upper support plate 35 stopper portion 36 shock absorber 37 medium rubber 38 soft rubber 39 medium rubber 40 hard rubber 301 lower support plate 302 sphere 303 first shock absorber 304 upper support plate 305 second shock Absorber 306 Third shock absorber 307 Intermediate ring 308 Upper ring 309 Lower ring 310 Inner ring

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Claims (7)

[Claims] 1. A lower support plate fixed to a ground side,
A sphere rollably mounted on the lower support plate,
An upper support plate supported by the sphere and fixed above the lower support plate with the sphere interposed therebetween, and an upper support plate and / or a lower surface of the upper support plate. A ring-shaped stopper portion surrounding the sphere is formed, and an outer peripheral surface of a ring-shaped shock absorber made of rubber or elastic foam is formed on an inner peripheral surface of the stopper portion. A seismic isolation device characterized by being bonded. 2. The shock absorber comprises a ring-shaped hard layer made of a hard rubber or an elastic foam, and a rubber or an elastic foam having a hardness lower than that of the rubber or the elastic foam constituting the hard layer. A ring-shaped intermediate layer and a ring-shaped soft layer made of rubber or elastic foam having a hardness lower than that of rubber or elastic foam constituting the intermediate layer are optional in the radial direction of the shock absorber. The seismic isolation device according to claim 1, wherein the seismic isolation device is laminated in the following order. 3. The shock absorber includes a hard layer formed in a ring shape on the innermost side, a first intermediate layer formed in a ring shape on the outer side of the hard layer, and the first intermediate layer. 3. An extruder according to claim 2, further comprising: a soft layer formed in a ring shape outside the layer, and a second intermediate layer formed in a ring shape outside the soft layer. Quake device. 4. A lower support plate fixed to a ground side,
A sphere rollably mounted on the lower support plate,
An upper support plate supported by the sphere and fixed above the lower support plate with the sphere interposed therebetween, and an upper surface of the lower support plate and a lower surface of the upper support plate, Ring-shaped stopper portions having the same diameter as each other and surrounding the sphere are formed, and inside the stopper portions, the height is set to surround the sphere and be longer than the radius of the sphere. A ring-shaped shock absorber made of rubber or elastic foam is placed movably in the radial direction of the stopper. 5. A ring-shaped elastic body is fixed to an inner peripheral surface of each of the stopper portions, and the shock absorber is a ring-shaped shock absorber main body made of rubber or elastic foam. A rod-like body made of lead having the same length as the height of the shock absorber main body, wherein a large number of the rod-like bodies are arranged around the axis of the shock absorber. 4. The seismic isolation device according to 4. 6. A ring-shaped elastic body is fixed to an inner peripheral surface of the stopper portion, the shock absorber is an intermediate ring body made of soft rubber or elastic foam, and the intermediate ring The lower surface is adhered to the upper surface of the body, the outer peripheral surface is opposed to the inner peripheral surface of the stopper formed on the upper support plate, and the upper ring body is integrally formed of a metal material. An upper surface is adhered, an outer peripheral surface is opposed to an inner peripheral surface of a stopper formed on the lower support plate, and a lower ring body integrally formed of a metal material is provided. 5. An inner ring body having a height substantially equal to a length from a lower surface of the lower ring body to an upper surface of the upper ring body. Seismic isolation device. 7. A seismic isolation structure for a light-weight structure, wherein the seismic isolation device according to claim 1 is provided.