JP6447172B2 - 3D seismic isolation device - Google Patents

Description

  The present invention relates to a three-dimensional seismic isolation device that three-dimensionally isolates a structure such as a building.

  Conventionally, a three-dimensional seismic isolation device is known that is provided on a lower structure such as a foundation installed on the ground and three-dimensionally isolates an upper structure such as a building. And as an example of the said apparatus, what has arrange | positioned the laminated rubber which isolate | separates an upper structure in a horizontal direction, and the air spring which isolates the same upper structure in an up-down direction in series is mentioned (patent document) 1).

JP-A-2-279870

  Here, air springs are generally easy to buckle and can be applied only to lightweight buildings. Therefore, if you want to apply it to heavier buildings, you need to take measures to prevent buckling. One proposal for such a buckling prevention measure is to provide a regulating member that regulates the deformation of the air spring in the horizontal direction.

  However, if the building to be seismically isolated becomes even heavier, it will be necessary to increase the size of the regulating member, which may lead to an increase in the size of the three-dimensional seismic isolation device. It can cause problems such as expansion.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to make the three-dimensional seismic isolation device compact while improving the buckling resistance of the air spring.

In order to achieve this object, the invention shown in claim 1
A three-dimensional seismic isolation device that is interposed between the upper structure and the lower structure to seismically isolate the upper structure;
A laminated rubber for isolating the upper structure in the horizontal direction;
A pair of air springs arranged in series on both sides in the vertical direction of the laminated rubber, and isolating the upper structure in the vertical direction, and
Each of the pair of air springs has a bag body containing compressed gas as a main body of the air spring,
When comparing the outer peripheral portion in the horizontal direction in the bag body and the inner portion in the horizontal direction from the outer peripheral portion, the outer peripheral portion protrudes on both sides in the vertical direction from the inner portion, The inner portion is inflatable until the vertical size is at least the same as the outer periphery,
The outer peripheral portion is located outward of the laminated rubber in the horizontal direction.

According to the first aspect of the present invention, at least the pair of air springs are arranged in series in the vertical direction. Therefore, the buckling resistance can be enhanced through the reduction of the vertical dimension per air spring.
Moreover, the said outer peripheral part of the bag body which concerns on an air spring protrudes in the both sides of the up-down direction rather than the said inner part, and the said outer peripheral part is located in the horizontal direction outer side rather than laminated rubber. Therefore, the bag body and the laminated rubber can be arranged in series while the outer peripheral portion and the laminated rubber overlap each other in the vertical direction. As a result, the vertical dimension of the three-dimensional seismic isolation device can be reduced by the amount corresponding to the overlap, and as a result, the three-dimensional seismic isolation device can be made compact.

The invention shown in claim 2 is the three-dimensional seismic isolation device according to claim 1,
Above the upper air spring of the pair of air springs, laminated rubber is arranged in series separately from the laminated rubber,
The outer peripheral portion of the bag body related to the upper air spring is located outward in the horizontal direction from the laminated rubber.

According to the second aspect of the present invention, the laminated rubber is additionally arranged in series above the upper air spring. Therefore, the horizontal seismic isolation stroke can be expanded. Also for this laminated rubber, the outer peripheral part of the above-mentioned air spring is located outward in the horizontal direction, so that these outer peripheral part and laminated rubber are arranged while overlapping each other in the vertical direction. As a result, the vertical dimension of the three-dimensional seismic isolation device can be reduced by this overlap.
In this case, even if an upper structure is disposed immediately above the laminated rubber, the laminated rubber avoids interference between the outer peripheral portion of the air spring bag and the lower surface of the upper structure. To do. Therefore, for the purpose of avoiding such interference, it is not necessary to insert a spacer member between the air spring and the upper structure, and as a result, three-dimensional due to the insertion of a member that does not contribute to seismic isolation such as the spacer member. It is possible to effectively prevent the vertical dimension of the seismic isolation device from becoming substantially large.

The invention shown in claim 3 is the three-dimensional seismic isolation device according to claim 1 or 2,
Below the lower air spring of the pair of air springs, laminated rubber is arranged in series separately from the laminated rubber,
The said outer peripheral part of the said bag body which concerns on the said lower air spring is located in the outward of a horizontal direction rather than the said laminated rubber, It is characterized by the above-mentioned.

According to the third aspect of the present invention, the laminated rubber is separately arranged in series below the lower air spring. Therefore, the horizontal seismic isolation stroke can be expanded. Also for this laminated rubber, the outer peripheral part of the above-mentioned air spring is located outward in the horizontal direction, so that these outer peripheral part and laminated rubber are arranged while overlapping each other in the vertical direction. As a result, the vertical dimension of the three-dimensional seismic isolation device can be reduced by this overlap.
Further, in this case, even if the lower structure is disposed immediately below the laminated rubber, the laminated rubber avoids interference between the outer peripheral portion of the air spring bag and the upper surface of the lower structure. Therefore, for the purpose of avoiding such interference, it is not necessary to insert a spacer member between the air spring and the lower structure, and as a result, three-dimensional due to the insertion of a member that does not contribute to seismic isolation such as the spacer member. It is possible to effectively prevent the vertical dimension of the seismic isolation device from becoming substantially large.

The invention shown in claim 4 is the three-dimensional seismic isolation device according to claim 2 or 3,
While regulating the relative displacement in the horizontal direction between the lower surface of the laminated rubber disposed adjacent to the upper side of the bag body and the upper surface of the laminated rubber disposed adjacent to the lower side of the bag body, It has the horizontal direction relative displacement control member which guides the expansion and contraction deformation of the up-down direction of a bag body acceptably.

According to the fourth aspect of the present invention, a horizontal load that can be input to the three-dimensional seismic isolation device at the time of horizontal seismic isolation can be received by the horizontal relative displacement regulating member, whereby the horizontal load is reduced. It can prevent effectively acting on the above-mentioned bag object concerning an air spring. Therefore, buckling of the bag can be prevented more reliably.
Further, since the restricting member allows the bag body related to the air spring to be expanded and contracted in the vertical direction, it is effectively avoided that the restricting member inhibits the vertical seismic isolation action that the bag body can exhibit. Is done.

The invention shown in claim 5 is the three-dimensional seismic isolation device according to any one of claims 1 to 4,
It has an up-down direction deformation | transformation control member which controls that the said inner part of the said bag body of the said air spring exceeds a predetermined value of an up-down direction.

  According to the fifth aspect of the present invention, the vertical deformation of the inner portion of the bag body is stored below the predetermined value by the vertical deformation regulating member. Therefore, it is possible to effectively prevent buckling that can occur in the bag when the deformation is excessive, and as a result, it is possible to stabilize the vertical seismic isolation function.

The invention shown in claim 6 is the three-dimensional seismic isolation device according to any one of claims 1 to 5,
A tank for storing the compressed gas so as to be supplied and discharged;
A flow path for supplying and discharging the compressed gas between the bag body and the tank is provided inside the laminated rubber.

  According to the sixth aspect of the present invention, the flow path for supplying and discharging the compressed gas is provided inside the laminated rubber. Therefore, the number of pipe members provided outside the laminated rubber for the purpose of forming the flow path can be reduced, and as a result, cost reduction and compactness of the three-dimensional seismic isolation device can be achieved.

  According to the present invention, the three-dimensional seismic isolation device can be made compact while increasing the buckling resistance of the air spring.

It is a general | schematic center longitudinal cross-sectional view of the three-dimensional seismic isolation apparatus 10 which concerns on this embodiment. It is a general | schematic center longitudinal cross-sectional view of the three-dimensional seismic isolation apparatus 10 at the time of seismic isolation in a horizontal direction. 3A is a schematic plan view of the air spring 30, FIG. 3B is a cross-sectional view taken along the line BB in FIG. 3A, and FIG. 3C shows the air spring 30 in an expanded state in the vertical direction. It is the figure shown in the B cross section. 4A to 4C are schematic center longitudinal sectional views showing a state in which the three-dimensional seismic isolation device 10 performs base isolation in the vertical direction based on the expansion / contraction deformation of the air spring 30. It is the schematic for demonstrating the effect which the three-dimensional seismic isolation apparatus 10 of this embodiment show | plays. It is a general | schematic center longitudinal cross-sectional view which expands and shows the horizontal direction relative displacement control member 40 and its vicinity part. It is a BB arrow line view in FIG. 6A. It is a general | schematic center longitudinal cross-sectional view of an example of the three-dimensional seismic isolation apparatus 10a from which the number of the laminated rubber 20 and the air springs 30 differs from this embodiment. It is explanatory drawing of the three-dimensional seismic isolation apparatus 10 'of a 1st modification, Comprising: It is a general | schematic center longitudinal cross-sectional view which shows the principal part. It is a BB arrow line view in FIG. 8A. It is a general | schematic center longitudinal cross-sectional view of the three-dimensional seismic isolation apparatus 10 '' of a 2nd modification. It is a general | schematic center longitudinal cross-sectional view of 3D seismic isolation apparatus 10 "'which gives the said device which concerns on a 2nd modification with respect to the 3D seismic isolation apparatus 10' of the above-mentioned 1st modification.

=== This Embodiment ===
FIG. 1 is a schematic center longitudinal sectional view of a three-dimensional seismic isolation device 10 according to the present embodiment. FIG. 2 is a schematic center longitudinal cross-sectional view of the three-dimensional seismic isolation device 10 during seismic isolation in the horizontal direction.

  As shown in FIG. 1, in this example, the three-dimensional seismic isolation device 10 is arranged on a foundation slab 5 provided on the ground as an example of a lower structure, and the device 10 3D-isolates the building 1 as an example of the upper structure. That is, the three-dimensional seismic isolation device 10 is inserted in a gap between the upper surface of the foundation slab 5 and the lower surface of the building 1, supports the weight of the building 1, and performs horizontal displacement and vertical displacement of the ground. Suppress input to building 1.

  However, the arrangement position of the three-dimensional seismic isolation device 10 in the vertical direction (vertical direction) is not limited to the above. For example, when the building 1 has an upper floor and a lower floor adjacent to each other in the vertical direction, the three-dimensional seismic isolation device 10 may be interposed between the upper floor and the lower floor. In this way, the upper floor can be seismically isolated between the layers.

  Although not shown, in this example, the three-dimensional seismic isolation device 10 is arranged at a plurality of planar positions on the upper surface of the foundation slab 5. The plurality of three-dimensional seismic isolation devices 10 cooperate with each other to support the weight of the building 1, but the plurality of three-dimensional seismic isolation devices 10 basically have the same structure. Therefore, below, the one three-dimensional seismic isolation apparatus 10 is demonstrated. Incidentally, as an example of the plane position where the three-dimensional seismic isolation device 10 is arranged, for example, a position directly below the pillar of the building 1 can be cited.

  The three-dimensional seismic isolation device 10 is a pair of a laminated rubber 20m (20) that isolates the building 1 in the horizontal direction and a series of rubbers 20m that are arranged in series on both sides of the laminated rubber 20m in the vertical direction to isolate the building 1 in the vertical direction. Air springs 30 and 30. In the example of FIG. 1, another laminated rubber 20u (20) is arranged in series further above the upper air spring 30u (30), and further, the lower air spring 30d (30) is further disposed. Another laminated rubber 20d (20) is also arranged in series below. However, these two laminated rubbers 20u and 20d are not essential components, that is, they may be omitted depending on circumstances.

  The laminated rubber 20 has as its main body a laminated body 20a in which a plurality of substantially horizontal rubber layers (not shown) and substantially horizontal steel plate layers (not shown) are alternately arranged in the vertical direction. Further, steel horizontal flange plates 20f and 20f are integrally fixed to the upper surface and the lower surface of the laminate 20a, respectively, whereby each horizontal flange plate 20f is respectively connected to the upper surface 20su and the lower surface of the laminated rubber 20. 20sd.

  When the foundation slab 5 is horizontally displaced integrally with the ground during an earthquake, as shown in FIG. 2, each laminated rubber 20 quickly undergoes elastic shear deformation in the horizontal direction. The input of horizontal displacement to 1 is suppressed.

  3A is a schematic plan view of the air spring 30, and FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A. Moreover, FIG. 3C is the figure which showed the air spring 30 of the expansion state to the up-down direction in the BB cross section in FIG. 3A.

  As shown in FIGS. 3A and 3B, the air spring 30 has a bag body 31 that is substantially circular in plan view and has a flat shape as a main body. Specifically, the outer peripheral portion 31R in the horizontal direction of the bag body 31 is formed in an annular shape, and when the portion 31P in the horizontal direction with respect to the outer peripheral portion 31R is compared with the outer peripheral portion 31R, the same The outer peripheral portion 31R protrudes on both sides in the vertical direction from the inner portion 31P (FIG. 3B). More specifically, as shown in FIG. 3B, the outer peripheral portion 31R has a donut shape with a C-shaped cross section and a hollow inside, while the inner portion 31P has a pair of upper and lower circles that are circular in plan view. The plate-like portions 31Pu and 31Pd have a flat shape such that they are opposed to each other with a gap G31P in the vertical direction. And while the gap G31R having the C-shaped cross section is connected to the gap G31P, the inner portion 31P and the outer peripheral portion 31R are integrally connected, thereby comparing with the outer peripheral portion 31R as described above. Thus, a bag body 31 having a shape in which the inner portion 31P is flattened is formed.

  Further, as shown in FIGS. 3A and 3B, the upper surface 31Pua and the lower surface 31Pda of the inner portion 31P are respectively formed in a circular horizontal plane and have a size equal to or larger than the lower surface 20sd and the upper surface 20su of the laminated rubber 20. Is formed. Therefore, as shown in FIG. 1, the upper surface 31Pua of the inner portion 31P can be brought into contact with the lower surface 20sd of the laminated rubber 20 located on the upper side thereof over almost the entire surface. The lower surface 31Pda can be brought into contact with the upper surface 20su of the laminated rubber 20 located below the substantially entire surface. Therefore, it is possible to quickly transmit the load in the vertical direction between each air spring 30 and the laminated rubber 20, which is effective in realizing a quick vertical seismic isolation action by the air spring 30. Contribute.

  The bag 31 is made of an appropriate elastic material having a high elastic deformability. In this example, the bag body 31 is made of super elastic alloy steel having an elastic deformability higher than that of steel. Therefore, according to the pressure of compressed air (corresponding to compressed gas) inside the bag body 31, the inner portion 31P can be flexibly expanded and contracted in the vertical direction. That is, if the pressure of the compressed air is increased, the inner portion 31P of the bag body 31 has at least an outer circumference in the vertical direction from the state of FIG. 3B to the state of FIG. 3C based on its high elastic deformability. It can expand until it becomes the same as the part 31R. Therefore, when the foundation slab 5 is displaced up and down integrally with the ground during an earthquake, the bag body 31 rapidly contracts and deforms in the up and down direction according to the up and down displacement, as shown in FIGS. 4A to 4C. Or it expands and deform | transforms and this suppresses the input of the vertical displacement to the building 1.

  Moreover, as shown in FIG. 1, the three-dimensional seismic isolation device 10 has a tank 35T that stores compressed air so as to be supplied and discharged. The tank 35T is connected to the outer peripheral portion 31R of each bag body 31 of the air spring 30 via an appropriate pipe member 35P such as a high-pressure flexible hose, whereby the tank 35T is connected to each bag body 31. Compressed air can be supplied and discharged. Therefore, when the ground is displaced upward as shown in FIG. 4A, the compressed air in the bag body 31 is exhausted to the tank 35T so that the vertical dimension of the bag body 31 is quickly reduced. When the ground is displaced downward as described above, the tank 35T supplies compressed air to the bag body 31 so that the size of the bag body 31 in the vertical direction increases rapidly. As a result, each bag 31 can rapidly expand and contract in conjunction with the vertical displacement of the ground, and as a result, the vertical seismic isolation cycle of the air spring 30 can be prolonged. ing.

  By the way, according to the three-dimensional seismic isolation device 10 having such a configuration, the three-dimensional seismic isolation device 10 can be made compact while increasing the buckling resistance of the air spring 30. Details are as follows.

First, as schematically shown in the schematic diagram of FIG. 5, in this example, two air springs 30, 30 are arranged in series in the vertical direction. Therefore, the buckling resistance is enhanced through the reduction of the vertical dimension per one air spring 30.
Further, as shown in FIG. 5, the outer peripheral portion 31R of the bag body 31 of each air spring 30 protrudes on both sides in the vertical direction from the inner portion 31P, and the outer peripheral portion 31R includes the air spring 30. , 30 are positioned outward in the horizontal direction from the laminated rubber 20m (20) interposed between the two. Therefore, the bag body 31 and the laminated rubber 20m (20) can be arranged in series while the outer peripheral portions 31R and the laminated rubber 20m (20) overlap each other in the vertical direction. As a result, the vertical dimension of the three-dimensional seismic isolation device 10 can be reduced by the overlaps OL1 and OL2, and as a result, the three-dimensional seismic isolation device 10 is made compact.

  Further, in this example, as described above, the laminated rubber 20u is additionally arranged in series above the upper air spring 30u. Therefore, the horizontal seismic isolation stroke can be expanded. Further, the outer peripheral portion 31R of the bag body 31 of the upper air spring 30u is also located outward in the horizontal direction with respect to the laminated rubber 20u. As a result, the outer peripheral portion 31R and the laminated rubber 20u are arranged so as to overlap each other in the vertical direction. Therefore, the vertical dimension of the three-dimensional seismic isolation device 10 is reduced by the overlap OL3.

  Further, according to the configuration having the laminated rubber 20u above the upper air spring 30u in this way, the interference between the outer peripheral portion 31R of the bag body 31 of the upper air spring 30u and the lower surface of the building 1 can be avoided. Is possible. That is, since the outer peripheral portion 31R of the bag body 31 protrudes upward from the inner portion 31P, the outer peripheral portion 31R can interfere with the lower surface of the building 1 as it is, but here, in this example, As shown in FIG. 5, the laminated rubber 20u is disposed above the upper air spring 30u, whereby the laminated rubber 20u quickly contacts the upper surface 31Pua of the inner portion 31P on the lower surface 20sd. On the other hand, the upper surface 20su reliably contacts the lower surface of the building 1. Therefore, interference between the outer peripheral portion 31R of the bag body 31 of the air spring 30u and the lower surface of the building 1 is avoided. As a result, for the purpose of avoiding such interference, it is not necessary to insert an appropriate spacer member between the air spring 30u and the building 1, and as a result, the insertion of a member that does not contribute to seismic isolation such as the spacer member. This can effectively prevent the vertical dimension of the three-dimensional seismic isolation device 10 from becoming substantially large.

  The same applies to the laminated rubber 20d separately arranged in series below the lower air spring 30d shown in FIG. That is, according to the configuration having the laminated rubber 20d below the lower air spring 30d as described above, the interference between the outer peripheral portion 31R of the bag body 31 of the lower air spring 30d and the upper surface of the basic slab 5 is prevented. As a result, it is not necessary to interpose an appropriate spacer member between the air spring 30d and the foundation slab 5 for the purpose of avoiding such interference. As a result, it is possible to effectively prevent the vertical dimension of the three-dimensional seismic isolation device 10 from becoming substantially large due to the insertion of a member that does not contribute to the seismic isolation such as the spacer member. By the way, based on the insertion of the laminated rubber 20d, the horizontal seismic isolation stroke is expanded, and the vertical overlap OL4 between the outer peripheral portion 31R of the bag 31 and the laminated rubber 20d is based on. It goes without saying that the effect of reducing the vertical dimension of the three-dimensional seismic isolation device 10 can also be achieved.

Desirably, as in the example of FIG. 1, a horizontal relative displacement restricting member 40 is provided for each air spring 30, and the horizontal relative displacement restricting member 40 is disposed adjacent to the upper side of the bag body 31. While controlling the relative displacement in the horizontal direction between the lower surface 20 sd of the laminated rubber 20 and the upper surface 20 su of the laminated rubber 20 disposed adjacent to the lower side of the bag body 31, It is preferable to guide the shrinkage deformation in an acceptable manner.
And if the said horizontal direction relative displacement control member 40 operate | moves as mentioned above, it will be three-dimensional at the time of a horizontal direction seismic isolation, making the said control member 40 not inhibit the vertical direction seismic isolation action of the bag 31. The horizontal load that can be input to the seismic isolation device 10 can be quickly received by the restriction member 40. Therefore, it can prevent effectively that the said horizontal load acts on the bag body 31 of the air spring 30, As a result, the buckling of the same bag body 31 can be prevented more reliably.
Hereinafter, the configuration of the horizontal relative displacement regulating member 40 will be described in more detail with reference to FIGS. 6A and 6B. FIG. 6A is a schematic center longitudinal sectional view showing the horizontal relative displacement regulating member 40 and its vicinity in an enlarged manner. Moreover, FIG. 6B is a BB arrow line view in FIG. 6A.

As shown in FIG. 6A, the horizontal relative displacement restricting member 40 includes a horizontal flange plate 20fd (hereinafter referred to as the lower surface 20sd) of the laminated rubber 20 (20u) disposed adjacent to the upper side of the bag body 31 of the air spring 30. , Also referred to as “horizontal flange plate 20 fd for the lower surface” and a horizontal flange plate 20 fu (hereinafter referred to as “horizontal surface for the upper surface”) that forms the upper surface 20 su in the laminated rubber 20 (20 m) disposed adjacent to the lower side of the bag 31 The flange plate 20fu ”is also provided.
That is, first, the first annular member 41 is fixed to the former lower horizontal flange plate 20fd so as to be immovable by bolting or the like so as to surround the outer peripheral edge from the outside in the horizontal direction over the entire circumference. Has been. Specifically, as shown in FIG. 6A, the first annular member 41 has an annular horizontal portion 41a and an annular vertical portion 41b protruding downward from the outer peripheral edge of the horizontal portion 41a. ing. And the horizontal part 41a is piled up on the upper surface of the outer peripheral edge part of the horizontal flange plate 20fd for the lower surface, and is fixed so as to be immovable by bolting, whereby the vertical part 41b of the first annular member 41 is A space SP whose lower side is open is defined at an outer position in the horizontal direction than the horizontal flange plate 20fd for the lower surface. And the outer peripheral part 31R of the bag 31 of the air spring 30 is accommodated in the space SP.

  On the other hand, in the latter upper horizontal flange plate 20fu, the second annular member 42 is arranged so as to surround the vertical portion 41b of the first annular member 41 from the outside in the horizontal direction over the entire circumference. It is fixed so that it cannot be moved. Specifically, the second annular member 42 includes an annular horizontal portion 42a and an annular vertical portion 42b protruding upward from the outer peripheral edge portion of the horizontal portion 42a. And the horizontal part 42a is piled up on the lower surface of the outer peripheral edge part of the upper horizontal flange plate 20fu and fixed so as to be immovable by bolting, whereby the vertical part 42b of the second annular member 42 is The first annular member 41 is arranged opposite to the side of the vertical portion 41b with a slight gap. Therefore, at the time of horizontal isolation, the vertical portion 41b of the first annular member 41 and the vertical portion 42b of the second annular member 42 come into contact with each other, so that the former horizontal flange plate 20fd and the latter upper surface are used. The relative displacement in the horizontal direction with respect to the horizontal flange plate 20fu is restricted, thereby effectively preventing a horizontal load from acting on the bag body 31. At this time, the vertical portion 41b of the first annular member 41 and the vertical portion 42b of the second annular member 42 are slidable in the vertical direction. Therefore, the vertical expansion / contraction deformation of the inner portion 31P of the bag body 31 is allowed, and thus the bag body 31 can smoothly perform the vertical seismic isolation action.

  More preferably, the horizontal relative displacement restricting member 40 is provided with a vertical deformation restricting member 43 that restricts deformation of the inner portion 31P of the bag body 31 beyond a predetermined value in the vertical direction. Good to be. And if such an up-down direction deformation | transformation control member 43 is provided, the up-down direction deformation | transformation of the said inner part 31P will be stored below in a predetermined value. Therefore, buckling that can occur in the bag 31 when the deformation is excessive can be effectively prevented, and as a result, the vertical seismic isolation can be stabilized.

  The vertical deformation restricting member 43 is, for example, a vertical L-shaped saddle-shaped member as shown in FIG. 6A. As shown in FIG. 6B, the second annular member 42 is equidistant in the circumferential direction. A plurality are provided. As shown in FIG. 6A, each of the vertical direction deformation restricting members 43 includes a vertical portion 43b extending upward in the vertical direction from the vertical portion 42b of the second annular member 42 and a horizontal portion from the upper end portion of the vertical portion 43b. And a horizontal portion 43a extending inward in the direction, and as shown in FIG. 6B, the planar position of the inner end portion 43ae of the horizontal portion 43a is at least the outer peripheral edge portion 41e of the first annular member 41. It is a position that overlaps.

  Therefore, if the inner portion 31P of the bag body 31 in FIG. 6A is to be excessively deformed in the vertical direction, the lower horizontal flange plate 20fd is pushed upward based on the inner portion 31P, for example. The first annular member 41 fixed to the flange plate 20fd also moves upward together, and then the first annular member 41 moves to the inner end of the horizontal portion 43a related to the vertical direction deformation regulating member 43. This abuts against the portion 43ae, thereby restricting further deformation of the inner portion 31P of the bag body 31.

  6A and 6B, the first annular member 41 is fixed to the lower horizontal flange plate 20fd so as not to move, and the second annular member 42 is fixed to the upper horizontal flange plate 20fu so as not to move. However, the present invention is not limited to this, and the arrangement relationship may be reversed. That is, the first annular member 41 is fixed to the upper horizontal flange plate 20fu so that the vertical portion 41b protrudes upward, and the second annular member 42 is fixed to the vertical flange 42b. It may be fixed to the lower horizontal flange plate 20fd so as not to move in such a direction as to protrude downward. Also in this case, the vertical portion 43b of the vertical deformation restricting member 43 is provided on the vertical portion 42b of the second annular member 42. Here, the vertical portion 43b of the vertical deformation restricting member 43 is the first portion 43b. In addition to being provided extending downward from the vertical portion 42b of the two annular member 42, the lower end portion of the vertical portion 43b of the vertical deformation restricting member 43 is provided with a horizontal portion 43a extending inward in the horizontal direction. Become.

  As described above, as an example of the three-dimensional seismic isolation device 10 of the present embodiment, the configuration in which the two air springs 30 and 30 and the three laminated rubbers 20 and 20 are alternately arranged in series in the vertical direction has been described. The number of air springs 30 and the number of laminated rubbers 20 are not limited to this. That is, three or more air springs 30 and four or more laminated rubbers 20 may be arranged in series alternately in the vertical direction. For example, in the example of FIG. 7, the five air springs 30 and the six laminated rubbers 20 are alternately arranged in series in the vertical direction, but this may be used. This also applies to the first and second modifications described below.

  FIG. 8A is an explanatory view of the three-dimensional seismic isolation device 10 ′ of the first modification, and is a schematic center longitudinal sectional view showing the main part thereof. Moreover, FIG. 8B is a BB arrow line view in FIG. 8A. The main difference from the above-described embodiment is the configuration of the horizontal relative displacement restricting member 40 'and the vertical deformation restricting member 43', and other points are generally the same as those of the above-described embodiment. Therefore, the same components are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 8A and 8B, the horizontal relative displacement restricting member 40 ′ is also an annular member 40 ′. The annular member 40 ′ includes the lower surface horizontal flange plate 20fd and the upper surface horizontal flange plate 20fu. These are arranged so as to surround both from the outside in the horizontal direction. That is, the inner peripheral surface 40 s ′ of the annular member 40 ′ is arranged to face each outer peripheral surface of the lower surface horizontal flange plate 20 fd and the upper surface horizontal flange plate 20 fu with a small gap therebetween. Further, a concave portion 40h ′ is continuously formed over the entire circumference in the center portion in the vertical direction of the inner peripheral surface 40s ′, and the outer periphery of the bag body 31 of the air spring 30 is formed in the concave portion 40h ′. The part 31R is accommodated. Therefore, at the time of horizontal seismic isolation, the outer peripheral surfaces of the lower surface horizontal flange plate 20fd and the upper surface horizontal flange plate 20fu come into contact with the inner peripheral surface 40s ′ of the annular member 40 ′, so that these horizontal flange plates 20fd. , 20fu can be restricted relative to each other in the horizontal direction, and as a result, the input of a horizontal load to the bag body 31 of the air spring 30 can be prevented.

  On the other hand, as shown in FIG. 8B, a plurality of vertical direction deformation restricting members 43 'are provided at equal pitches in the circumferential direction of the annular member 40'. As shown in FIG. 8A, each vertical deformation restricting member 43 'has a pair of upper and lower horizontal portions 44u' and 44d 'extending inward in the horizontal direction from the upper surface and the lower surface of the annular member 40'. A plurality of disc springs 45 'and 45' are provided between the upper horizontal portion 44u 'and the lower horizontal flange plate 20fd, and between the lower horizontal portion 44d' and the upper horizontal flange plate 20fu. ... is inserted. Therefore, the inner portion 31P of the bag body 31 of the air spring 30 expands against the elastic force of the disc spring 45 ′. Is deformed asymmetrically in the horizontal direction by the elastic force, and as a result, the deformation of the inner portion 31P is stabilized. When the inner portion 31P expands and reaches the compression limit of the disc spring 45 ', further expansion is restricted so that the deformation of the bag 31 is completely restricted. That is, at this time, the vertical deformation control action similar to the vertical deformation control member 43 of the above-described embodiment can be achieved.

  In this example, in order to stabilize the arrangement position of each disc spring 45 ′, a guide pin 45p ′ is provided by extending the upper horizontal portion 44u ′ and the lower horizontal flange plate 20fd vertically. Similarly, a guide pin 45p ′ is provided by vertically spanning the lower horizontal portion 44d ′ and the upper horizontal flange plate 20fu. That is, each guide pin 45p 'is passed through a through hole formed in the center of each disc spring 45', and thereby each disc spring 45 'is fixed so as not to be disengaged laterally.

  Further, as described above, a plurality of the vertical direction deformation restricting members 43 ′ are provided at an equal pitch in the circumferential direction of the annular member 40 ′ (FIG. 8B). Therefore, the elastic force of the disc spring 45 ′ can act substantially evenly without being biased in the circumferential direction, and as a result, the deformation regulating action of the bag body 31 is also exerted without being biased in the circumferential direction.

  FIG. 9A is a schematic central longitudinal cross-sectional view of a three-dimensional seismic isolation device 10 ″ according to a second modification. In the above-described embodiment, as shown in FIG. 1, the bag body 31 of the air spring 30 and the tank 35 </ b> T are connected so as to be supplied and discharged by the pipe member 35 </ b> P disposed outside the laminated rubber 20. In the 2nd modification shown to 9A, the through-hole 20h along the up-down direction is each formed in the plane center of each laminated rubber 20, and the said through-hole 20h is used as a flow path for supply / exhaust of compressed air The main difference. Therefore, since the configuration other than this is generally the same as that of the above-described embodiment, the same configuration is denoted by the same reference numeral, and the description thereof is omitted.

  As shown in FIG. 9A, a through hole 31 h extending in the vertical direction is formed at the center of the plane of the bag body 31 of each air spring 30 so as to face the through hole 20 h of the laminated rubber 20. Therefore, the compressed air can be supplied and discharged into the bag body 31 through the through hole 31h. In this example, the supply / discharge path from the tank 35T to the through-hole 20h of the laminated rubber 20 is formed by a pipe member 35P1 such as a high-pressure flexible hose connected to the lower surface of the laminated rubber 20 located at the bottom. However, as can be seen from the comparison with FIG. 1 in which the above-described embodiment is shown, according to the second modification, at least the pipe member 35P provided outside the laminated rubber 20 can be omitted. Thereby, the quantity of the said pipe member 35P can be reduced. As a result, cost reduction and downsizing of the three-dimensional seismic isolation device 10 ″ can be achieved.

  Incidentally, FIG. 9B illustrates a case where such a device according to the second modification is applied to the three-dimensional seismic isolation device 10 ′ of the first modification described above. Also good. Note that the configuration of the three-dimensional seismic isolation device 10 ″ ″ can be grasped from the description of the first and second modifications described above, and thus the description thereof is omitted.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In above-mentioned embodiment, although compressed air was illustrated as an example of the compressed gas accommodated in the bag 31 of the air spring 30, it is not restricted to this at all. For example, nitrogen or an inert gas may be used.

  In the above-described embodiment, the bag body 31 of the air spring 30 is formed of superelastic alloy steel, but this is not a limitation. That is, as long as it has an elastic deformability equivalent to that of the superelastic alloy steel, it may be formed of another material, and may be made of rubber depending on the case.

  In the second modification described above, the disc spring 45 ′ is used in the vertical direction deformation regulating member 43 ′, but this is not a limitation. For example, a leaf spring or a coil spring may be used.

1 building (upper structure), 5 foundation slab (lower structure),
10 3D seismic isolation device, 10 '3D seismic isolation device, 10 "3D seismic isolation device, 10''' 3D seismic isolation device, 10a 3D seismic isolation device,
20 Laminated rubber, 20a Laminated body,
20u laminated rubber, 20m laminated rubber, 20d laminated rubber,
20f horizontal flange plate,
20fu horizontal flange plate for top surface, 20fd horizontal flange plate for bottom surface,
20h through-hole (flow path for supplying and discharging compressed gas),
20su upper surface, 20sd lower surface,
31 bag body, 31P inner part, 31Pu disk-shaped part,
31Pua upper surface, 31Pda lower surface,
31R outer periphery, 31h through hole,
35T tank, 35P pipe member, 35P1 pipe member,
40 horizontal direction relative displacement regulating member, 40s inner peripheral surface, 40h recess,
40 'annular member,
41 first annular member, 41a horizontal part, 41b vertical part,
42 second annular member, 42a horizontal portion, 42b vertical portion,
43 vertical deformation control member, 43a horizontal portion, 43b vertical portion,
44u 'horizontal part, 44d' horizontal part,
45h 'through hole, 45p' guide pin,
SP space, G31P interval, G31R gap

Claims (6)

A three-dimensional seismic isolation device that is interposed between the upper structure and the lower structure to seismically isolate the upper structure;
A laminated rubber for isolating the upper structure in the horizontal direction;
A pair of air springs arranged in series on both sides in the vertical direction of the laminated rubber, and isolating the upper structure in the vertical direction, and
Each of the pair of air springs has a bag body containing compressed gas as a main body of the air spring,
When comparing the outer peripheral portion in the horizontal direction in the bag body and the inner portion in the horizontal direction from the outer peripheral portion, the outer peripheral portion protrudes on both sides in the vertical direction from the inner portion, The inner portion is inflatable until the vertical size is at least the same as the outer periphery,
The three-dimensional seismic isolation device, wherein the outer peripheral portion is located outward in the horizontal direction with respect to the laminated rubber. The three-dimensional seismic isolation device according to claim 1,
Above the upper air spring of the pair of air springs, laminated rubber is arranged in series separately from the laminated rubber,
The three-dimensional seismic isolation device, wherein the outer peripheral portion of the bag body related to the upper air spring is located outward in the horizontal direction with respect to the laminated rubber. The three-dimensional seismic isolation device according to claim 1 or 2,
Below the lower air spring of the pair of air springs, laminated rubber is arranged in series separately from the laminated rubber,
The three-dimensional seismic isolation device characterized in that the outer peripheral portion of the bag body related to the lower air spring is located outward in the horizontal direction with respect to the laminated rubber. The three-dimensional seismic isolation device according to claim 2 or 3,
While regulating the relative displacement in the horizontal direction between the lower surface of the laminated rubber disposed adjacent to the upper side of the bag body and the upper surface of the laminated rubber disposed adjacent to the lower side of the bag body, A three-dimensional seismic isolation device comprising a horizontal relative displacement restricting member that guides the bag body in an up-and-down direction in an upward / downward direction. The three-dimensional seismic isolation device according to any one of claims 1 to 4,
A three-dimensional seismic isolation device, comprising a vertical deformation restricting member for restricting deformation of the bag body of the air spring beyond a predetermined value in the vertical direction. A three-dimensional seismic isolation device according to any one of claims 1 to 5,
A tank for storing the compressed gas so as to be supplied and discharged;
A three-dimensional seismic isolation device, wherein a flow path for supplying and discharging the compressed gas between the bag and the tank is provided inside the laminated rubber.