JP4971510B2 - Seismic isolation device - Google Patents

Seismic isolation device Download PDF

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JP4971510B2
JP4971510B2 JP2011032909A JP2011032909A JP4971510B2 JP 4971510 B2 JP4971510 B2 JP 4971510B2 JP 2011032909 A JP2011032909 A JP 2011032909A JP 2011032909 A JP2011032909 A JP 2011032909A JP 4971510 B2 JP4971510 B2 JP 4971510B2
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plate
seismic isolation
attached
laminated rubber
hole
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JP2011141036A (en
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圭司 増田
康人 佐々木
徳民 馮
勝巳 小林
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Fujita Corp
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Fujita Corp
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本発明は、上部の構造体と下部の構造体との間に設けられる免震装置に関する。   The present invention relates to a seismic isolation device provided between an upper structure and a lower structure.

免震装置は、免震用積層ゴムと、この免震用積層ゴムの上下にそれぞれ接合され上部の構造体または下部の構造体に取着される上下のフランジプレートとを備えている（特許文献１）。
免震用積層ゴムは、ゴムシートと鋼板を交互に接着して重ねた部材であり、鉛直方向に硬く、水平方向に柔らかく変形するという特徴を持っている。
このような免震用積層ゴムを備えた免震装置を用いて免震建物を設計する際、高層建物などの場合、隅柱において免震用積層ゴムに引張力が生じる場合がある。 The seismic isolation device includes a seismic isolation laminated rubber and upper and lower flange plates that are joined to the upper and lower structures of the seismic isolation laminated rubber, respectively. 1).
The seismic isolation laminated rubber is a member in which rubber sheets and steel plates are alternately bonded and overlapped, and is characterized by being hard in the vertical direction and softly deforming in the horizontal direction.
When designing a base-isolated building using such a base-isolated device having a base-isolated laminated rubber, a tensile force may be generated in the base-isolated laminated rubber in a corner column in a high-rise building or the like.

特開２０００−１７０８３５JP 2000-170835 A

この引張力に対して免震用積層ゴムで抵抗しようとした場合、ゴムシートと鋼板との接着力に期待することになり、免震用積層ゴムにダメージを与えてしまうことが懸念される。
従って、この免震用積層ゴムに作用する引張力の処理が問題となっている。
本発明は前記事情に鑑み案出されたものであって、本発明の目的は、免震装置に引張力が作用した場合であっても、免震用積層ゴムのダメージを低減できる免震装置を提供することにある。 If an attempt is made to resist the tensile force with the seismic isolation laminated rubber, the adhesive strength between the rubber sheet and the steel sheet is expected, and there is a concern that the seismic isolation laminated rubber may be damaged.
Therefore, the treatment of the tensile force acting on the seismic isolation laminated rubber is a problem.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a seismic isolation device capable of reducing damage to a laminated rubber for seismic isolation even when a tensile force is applied to the seismic isolation device. Is to provide.

前記目的を達成するため本発明は、上部の構造体と下部の構造体との間に設けられる免震装置であって、前記免震装置は、免震用積層ゴムと、この免震用積層ゴムの上下にそれぞれ接合され前記上部の構造体または前記下部の構造体に取着される上下のフランジプレートとを備え、前記上下のフランジプレートの少なくとも一方は、前記構造体に取着され内側に孔が形成された外側プレートと、前記免震用積層ゴムに取着され前記孔に移動可能に挿入された内側プレートとで構成され、前記外側プレートの前記孔の周囲の内周部と、前記孔に臨む前記内側プレートの外周部には、互いに係合可能で対向する構造体に近づくにつれて前記内側プレートの断面積を大きくする傾斜面がそれぞれ形成されていることを特徴とする。 To achieve the above object, the present invention provides a seismic isolation device provided between an upper structure and a lower structure, wherein the seismic isolation device includes a seismic isolation laminated rubber and a seismic isolation laminate. And upper and lower flange plates respectively bonded to the upper and lower structures and attached to the upper structure or the lower structure, and at least one of the upper and lower flange plates is attached to the structure and disposed on the inside. An outer plate formed with a hole, and an inner plate attached to the seismic isolation laminated rubber and movably inserted into the hole, an inner peripheral portion around the hole of the outer plate, The outer peripheral portion of the inner plate facing the hole is formed with inclined surfaces that increase the cross-sectional area of the inner plate as they approach each other and can be engaged with each other.

本発明によれば、引張力が生じた際に、免震用積層ゴムが内側プレートと共に、外側プレート及び構造体から浮き上がり、免震用積層ゴムへのダメージが低減される。   According to the present invention, when a tensile force is generated, the seismic isolation laminated rubber rises from the outer plate and the structure together with the inner plate, and damage to the seismic isolation laminated rubber is reduced.

第１の実施の形態の免震装置の正面図である。It is a front view of the seismic isolation apparatus of 1st Embodiment. 図１のＡＡ断面図である。It is AA sectional drawing of FIG. 第２の実施の形態の免震装置の正面図である。It is a front view of the seismic isolation apparatus of 2nd Embodiment. 図３のＡＡ断面図である。It is AA sectional drawing of FIG. （Ａ）は第３の実施の形態の免震装置の要部の正面図、（Ｂ）は第４の実施の形態の免震装置の要部の正面図、（Ｃ）は第５の実施の形態の免震装置の要部の正面図である。(A) is a front view of the principal part of the seismic isolation device of 3rd Embodiment, (B) is a front view of the principal part of the seismic isolation device of 4th Embodiment, (C) is 5th implementation. It is a front view of the principal part of the seismic isolation apparatus of the form.

以下、本発明の実施の形態を図面にしたがって説明する。
（第１の実施の形態）
図１は第１の実施の形態の免震装置の正面図、図２は図１のＡＡ断面図を示す。
免震装置８は、上部の構造体１２と下部の構造体１４との間に設けられ、下部の構造体１４上において上部の構造体１２を免震支持するものである。
ここで、下部の構造体１４とは、例えば、基礎や建物などであり、上部の構造体１２とは建物や柱や床などであり、このような上部の構造体１２と下部の構造体１４との間に免震装置８は複数設けられる。
免震装置８は、免震用積層ゴム１０と、この免震用積層ゴム１０の上下にそれぞれ接合され上部の構造体１２または下部の構造体１４にボルトＢで取着される上下のフランジプレート２２とを備えている。
免震用積層ゴムは多数のゴムシートと鋼板とが交互に重ね合わされ接合されたものであり、内部に、振動のエネルギを吸収する鉛の柱が挿入されているものや挿入されていないものがあり、本発明は双方に適用される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a front view of the seismic isolation device of the first embodiment, and FIG. 2 is a cross-sectional view taken along AA in FIG.
The seismic isolation device 8 is provided between the upper structure 12 and the lower structure 14, and supports the upper structure 12 on the lower structure 14.
Here, the lower structure 14 is, for example, a foundation or a building, and the upper structure 12 is a building, a pillar, a floor, or the like. Such an upper structure 12 and a lower structure 14 are used. A plurality of seismic isolation devices 8 are provided.
The seismic isolation device 8 includes a seismic isolation laminated rubber 10 and upper and lower flange plates which are joined to the upper structure 12 or the lower structure 14 with bolts B, respectively. 22.
Seismic isolation laminated rubber is a structure in which a number of rubber sheets and steel plates are alternately stacked and joined, and there are those with lead pillars that absorb vibration energy inserted and those without. Yes, the present invention applies to both.

第１の実施の形態では、上下のフランジプレート２２のうち、下部の構造体１４に取着されるフランジプレート２２が、構造体１４にボルトＢで取着され内側に孔２８が形成された外側プレート２４と、免震用積層ゴム１０に取着され孔２８に移動可能に挿入された内側プレート２６とで構成されている。
内側プレート２６は、免震用積層ゴム１０の断面よりも大きな断面で形成され、内側プレート２６の中心と免震用積層ゴム１０の軸心とは合致している。
本実施の形態では、内側プレート２６および孔２８は円形で形成され、外側プレート２４は環板状に形成されている。
本実施の形態では、内側プレート２６と外側プレート２４は同一の厚さで形成されている。
また、本実施の形態では、外側プレート２４の孔２８の周囲の内周部と、孔２８に臨む内側プレート２６の外周部には、互いに係合可能で対向する上部の構造体１２に近づくにつれて内側プレート２６の断面積を大きくする傾斜面２４Ａ、２６Ａがそれぞれ形成されている。 In the first embodiment, of the upper and lower flange plates 22, the flange plate 22 to be attached to the lower structure 14 is attached to the structure 14 with the bolt B, and the outer side in which the hole 28 is formed. The plate 24 and the inner plate 26 that is attached to the seismic isolation laminated rubber 10 and is movably inserted into the hole 28 are configured.
The inner plate 26 is formed with a cross section larger than the cross section of the seismic isolation laminated rubber 10, and the center of the inner plate 26 coincides with the axis of the seismic isolation laminated rubber 10.
In the present embodiment, the inner plate 26 and the hole 28 are formed in a circular shape, and the outer plate 24 is formed in an annular plate shape.
In the present embodiment, the inner plate 26 and the outer plate 24 are formed with the same thickness.
Further, in the present embodiment, the inner peripheral portion around the hole 28 of the outer plate 24 and the outer peripheral portion of the inner plate 26 facing the hole 28 become closer to the upper structure 12 that can be engaged with each other and face each other. Inclined surfaces 24A and 26A that increase the cross-sectional area of the inner plate 26 are formed.

次に、作用効果について説明する。
免震装置８に引張力が作用した際、免震用積層ゴム１０と内側プレート２６は引張方向である上下方向において外側プレート２４に対して切り離されているので、免震用積層ゴム１０は内側プレート２６と共に、外側プレート２４から浮き上がる。
したがって、免震用積層ゴム１０に引張力は作用せず、免震用積層ゴム１０へのダメージを低減することが可能となる。
また、免震用積層ゴム１０が内側プレート２６と共に、外側プレート２４から浮き上がっても、内側プレート２６の傾斜面、２６Ａと外側プレート２４の傾斜面２４Ａが係合するため、免震用積層ゴム１０に作用するせん断力は上下の構造体１２、１４間で伝達され、免震性能が発揮される。
また、本実施の形態では、外側プレート２４の内周部と、内側プレート２６の外周部に、互いに係合可能で対向する上部の構造体１２に近づくにつれて内側プレート２６の断面積を大きくする傾斜面２４Ａ、２６Ａがそれぞれ形成されているので、免震用積層ゴム１０の浮き上がりが円滑になされ、免震用積層ゴム１０へのダメージを低減する上でより有利となっている。 Next, operational effects will be described.
When a tensile force is applied to the seismic isolation device 8, the seismic isolation laminated rubber 10 and the inner plate 26 are separated from the outer plate 24 in the vertical direction, which is the tensile direction. Together with the plate 26, it floats from the outer plate 24.
Therefore, no tensile force acts on the seismic isolation laminated rubber 10, and damage to the seismic isolation laminated rubber 10 can be reduced.
In addition, even if the seismic isolation laminated rubber 10 is lifted from the outer plate 24 together with the inner plate 26, the inclined surface 26A of the inner plate 26 and the inclined surface 24A of the outer plate 24 are engaged. Is transmitted between the upper and lower structures 12 and 14, and the seismic isolation performance is exhibited.
In the present embodiment, the inner plate 26 and the inner plate 26 are inclined to increase the cross-sectional area of the inner plate 26 closer to the upper structure 12 that can be engaged with and opposed to each other. Since the surfaces 24A and 26A are respectively formed, the seismic isolation laminated rubber 10 is smoothly lifted, which is more advantageous in reducing damage to the seismic isolation laminated rubber 10.

（第２の実施の形態）
次に、第２の実施の形態について説明する。
図３は第２の実施の形態の免震装置の正面図、図４は図３のＡＡ断面図を示す。
なお、以下の実施の形態において、第１の実施の形態と同様な箇所、部材に同一の符号を付してその説明を簡略化し、または省略して要部のみを説明する。
免震装置８は、免震用積層ゴム１０と、この免震用積層ゴム１０の上下にそれぞれ接合され上部の構造体１２または下部の構造体１４にボルトＢで取着される上下のフランジプレート２２とを備えている。 (Second Embodiment)
Next, a second embodiment will be described.
FIG. 3 is a front view of the seismic isolation device of the second embodiment, and FIG. 4 is a cross-sectional view taken along line AA in FIG.
In the following embodiments, the same parts and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be simplified or omitted, and only the main parts will be described.
The seismic isolation device 8 includes a seismic isolation laminated rubber 10 and upper and lower flange plates which are joined to the upper structure 12 or the lower structure 14 with bolts B, respectively. 22.

第１の実施の形態と同様に、上下のフランジプレート２２のうち、下部の構造体１４に取着されるフランジプレート２２が、構造体１４にボルトＢで取着され内側に孔２８が形成された外側プレート２４と、免震用積層ゴム１０に取着され孔２８に移動可能に挿入された内側プレート２６とで構成されている。
内側プレート２６は、免震用積層ゴム１０の断面よりも大きな断面で形成され、内側プレート２６の中心と免震用積層ゴム１０の軸心とは合致している。
本実施の形態では、内側プレート２６および孔２８は多角形（正八角形）で形成され、外側プレート２４は環板状に形成されている。なお、多角形は、免震用積層ゴム１０に作用するせん断力を上下の構造体１２、１４間で伝達する必要があるため、八角形程度が望ましい。 As in the first embodiment, of the upper and lower flange plates 22, the flange plate 22 to be attached to the lower structure 14 is attached to the structure 14 with bolts B, and a hole 28 is formed inside. The outer plate 24 and the inner plate 26 attached to the seismic isolation laminated rubber 10 and movably inserted into the holes 28 are formed.
The inner plate 26 is formed with a cross section larger than the cross section of the seismic isolation laminated rubber 10, and the center of the inner plate 26 coincides with the axis of the seismic isolation laminated rubber 10.
In the present embodiment, the inner plate 26 and the hole 28 are formed in a polygon (regular octagon), and the outer plate 24 is formed in a ring plate shape. In addition, since it is necessary to transmit the shear force which acts on the laminated rubber 10 for seismic isolation between the upper and lower structures 12, 14, the polygon is preferably about an octagon.

本実施の形態では、外側プレート２４の厚さは内側プレート２６の厚さよりも大きい寸法で形成されている。そして、外側プレート２４が構造体１４に取着される面と、免震用積層ゴム１０に接合された面と反対に位置する内側プレート２６の面とを同一面上に位置させた状態で、外側プレート２４は、内側プレート２６よりも対向する構造体１２に近づく方向に突出している。
また、本実施の形態でも、外側プレート２４の孔２８の周囲の内周部と、孔２８に臨む内側プレート２６の外周部には、互いに係合可能で対向する上部の構造体１２に近づくにつれて内側プレート２６の断面積を大きくする傾斜面２４Ａ、２６Ａがそれぞれ形成されている。
また、本実施の形態では、外側プレート２４は、孔２８の周方向に沿って分割された複数の分割体２４０２で構成され、それら各分割体２４０２はボルトＢにより構造体１４に取着されている。なお、分割体２４０２を相互に連結するようにすると、構造体１４と固定するボルトＢの本数を減らすことができる。 In the present embodiment, the thickness of the outer plate 24 is formed to be larger than the thickness of the inner plate 26. And in the state where the surface where the outer plate 24 is attached to the structure 14 and the surface of the inner plate 26 located opposite to the surface joined to the seismic isolation laminated rubber 10 are located on the same surface, The outer plate 24 protrudes in a direction closer to the opposing structure 12 than the inner plate 26.
Also in the present embodiment, the inner peripheral portion around the hole 28 of the outer plate 24 and the outer peripheral portion of the inner plate 26 facing the hole 28 become closer to the upper structure 12 that can be engaged with each other and face each other. Inclined surfaces 24A and 26A that increase the cross-sectional area of the inner plate 26 are formed.
In the present embodiment, the outer plate 24 includes a plurality of divided bodies 2402 divided along the circumferential direction of the hole 28, and each of the divided bodies 2402 is attached to the structure body 14 with bolts B. Yes. In addition, when the divided bodies 2402 are connected to each other, the number of bolts B to be fixed to the structure body 14 can be reduced.

次に、作用効果について説明する。
免震装置８に引張力が作用した際、免震用積層ゴム１０と内側プレート２６は引張方向である上下方向において外側プレート２４に対して切り離されているので、免震用積層ゴム１０は内側プレート２６と共に、外側プレート２４から浮き上がる。
したがって、免震用積層ゴム１０に引張力は作用せず、免震用積層ゴム１０へのダメージを低減することが可能となる。
また、免震用積層ゴム１０が内側プレート２６と共に、外側プレート２４から浮き上がっても、内側プレート２６の傾斜面２６Ａと外側プレート２４の傾斜面２４Ａが係合するため、免震用積層ゴム１０に作用するせん断力は上下の構造体１２、１４間で伝達され、免震性能が発揮される。
また、本実施の形態では、外側プレート２４の内周部と内側プレート２６の外周部に、互いに係合可能で対向する上部の構造体１２に近づくにつれて内側プレート２６の断面積を大きくする傾斜面２４Ａ、２６Ａがそれぞれ形成されているので、免震用積層ゴム１０の浮き上がりが円滑になされ、免震用積層ゴム１０へのダメージを低減する上でより有利となっている。
また、本実施の形態では、外側プレート２４の厚さは内側プレート２６の厚さよりも大きい寸法で形成されており、このように外側プレート２４の厚さを内側プレート２６の厚さよりも大きな寸法に調整することで、免震建物設計時の浮き上がり量に応じた免震装置８の設計が可能となる。 Next, operational effects will be described.
When a tensile force is applied to the seismic isolation device 8, the seismic isolation laminated rubber 10 and the inner plate 26 are separated from the outer plate 24 in the vertical direction, which is the tensile direction. Together with the plate 26, it floats from the outer plate 24.
Therefore, no tensile force acts on the seismic isolation laminated rubber 10, and damage to the seismic isolation laminated rubber 10 can be reduced.
Further, even if the seismic isolation laminated rubber 10 is lifted from the outer plate 24 together with the inner plate 26, the inclined surface 26A of the inner plate 26 and the inclined surface 24A of the outer plate 24 are engaged. The acting shear force is transmitted between the upper and lower structures 12 and 14, and the seismic isolation performance is exhibited.
Further, in the present embodiment, the inclined surface that increases the cross-sectional area of the inner plate 26 toward the inner peripheral portion of the outer plate 24 and the outer peripheral portion of the inner plate 26 so as to be able to engage with each other and face the upper structure 12 facing each other. Since each of 24A and 26A is formed, the seismic isolation laminated rubber 10 is lifted smoothly, which is more advantageous in reducing damage to the seismic isolation laminated rubber 10.
Further, in the present embodiment, the thickness of the outer plate 24 is formed to be larger than the thickness of the inner plate 26, and thus the thickness of the outer plate 24 is made to be larger than the thickness of the inner plate 26. By adjusting, it becomes possible to design the seismic isolation device 8 according to the amount of lifting at the time of design of the base isolation building.

（第３、第４、第５の実施の形態）
次に、第３乃至第５の実施の形態について説明する。
図５（Ａ）は第３の実施の形態の免震装置の要部の正面図、（Ｂ）は第４の実施の形態の免震装置の要部の正面図、（Ｃ）は第５の実施の形態の免震装置の要部の正面図を示す。
図５（Ａ）に示す第３の実施の形態は、第１、第２の実施の形態と同様に、外側プレート２４の孔２８の周囲の内周部と、孔２８に臨む内側プレート２６の外周部には、互いに係合可能で対向する上部の構造体１２に近づくにつれて内側プレート２６の断面積を大きくする傾斜面２４Ａ、２６Ａがそれぞれ形成されている。
また、第２の実施の形態と同様に、外側プレート２４の厚さは内側プレート２６の厚さよりも大きい寸法で形成され、外側プレート２４が構造体１４に取着される面と、免震用積層ゴム１０に接合された面と反対に位置する内側プレート２６の面とは同一面上に位置している。
そして、内側プレート２６の外周部で免震用積層ゴム１０が取着された面と傾斜面２６Ａとが交わる箇所に面取り３０が施されている。
面取り３０は、内側プレート２６の外周部の全周にわたって設けられ、本実施の形態では面取り３０は湾曲面で形成されている。
第３の実施の形態によれば、第２の実施の形態と同様な効果が奏され、さらに、面取り３０を備えるので、外側プレート２４の内周部に対する内側プレート２６の外周部の引っ掛かりなどを防止でき、免震用積層ゴム１０の浮き上がりをより円滑に行なう上で有利となる。 (Third, fourth and fifth embodiments)
Next, third to fifth embodiments will be described.
FIG. 5A is a front view of the main part of the seismic isolation device of the third embodiment, FIG. 5B is a front view of the main part of the seismic isolation device of the fourth embodiment, and FIG. The front view of the principal part of the seismic isolation apparatus of embodiment of this is shown.
The third embodiment shown in FIG. 5A is similar to the first and second embodiments in that the inner peripheral portion around the hole 28 of the outer plate 24 and the inner plate 26 facing the hole 28 are arranged. On the outer periphery, inclined surfaces 24A and 26A are formed, respectively, which increase the cross-sectional area of the inner plate 26 as they approach the upper structure 12 that can be engaged with each other and face each other.
Similarly to the second embodiment, the thickness of the outer plate 24 is larger than the thickness of the inner plate 26, the surface on which the outer plate 24 is attached to the structure 14, and the seismic isolation The surface of the inner plate 26 positioned opposite to the surface bonded to the laminated rubber 10 is positioned on the same surface.
And the chamfering 30 is given to the location where the surface where the seismic isolation laminated rubber 10 is attached to the outer peripheral portion of the inner plate 26 and the inclined surface 26A intersect.
The chamfer 30 is provided over the entire outer periphery of the inner plate 26, and the chamfer 30 is formed of a curved surface in the present embodiment.
According to the third embodiment, the same effects as those of the second embodiment can be obtained. Further, since the chamfer 30 is provided, the outer peripheral portion of the inner plate 26 is hooked on the inner peripheral portion of the outer plate 24. This is advantageous in that the seismic isolation laminated rubber 10 can be lifted more smoothly.

図５（Ｂ）に示す第４の実施の形態は、内側プレート２６が、免震用積層ゴム１０が取着され外側プレート２４の厚さよりも小さい寸法の厚さを有する基板部２６０２と、基板部２６０２の外周から免震用積層ゴム１０に臨むように起立された起立板部２６０４とを有している。
そして、起立板部２６０４の外周部が、外側プレート２４の孔２８に移動可能に挿入されている。
外側プレート２４の孔２８の周囲の内周部と、孔２８に臨む起立板部２６０４の外周部には、互いに係合可能で対向する上部の構造体１２に近づくにつれて起立板部２６０４の輪郭を大きくする傾斜面２４Ａ、２６Ａがそれぞれ形成されている。
そして、外側プレート２４が下部の構造体１４に取着される面と、免震用積層ゴム１０に取着された面と反対に位置する基板部２６０２の面とは同一面上に位置している。
本実施の形態では、起立板部２６０４の高さを外側プレート２４の厚さに揃えている。
第４の実施の形態によれば、第２の実施の形態と同様な効果が奏され、さらに、傾斜面２６Ａを有する起立板部２６０４を備えるので、免震用積層ゴム１０の浮き上がりをより円滑に行なう上で有利となる。
また、本実施の形態では、起立板部２６０４の高さを外側プレート２４の厚さに揃えているので、外側プレート２４の内周部に対する内側プレート２６の外周部の引っ掛かりなどを防止でき、免震用積層ゴム１０の浮き上がりをより円滑に行なう上で有利となる。 In the fourth embodiment shown in FIG. 5B, the inner plate 26 has a substrate portion 2602 having a thickness smaller than the thickness of the outer plate 24 to which the laminated rubber 10 for seismic isolation is attached, And an upright plate portion 2604 erected so as to face the seismic isolation laminated rubber 10 from the outer periphery of the portion 2602.
And the outer peripheral part of the standing board part 2604 is inserted in the hole 28 of the outer side plate 24 so that a movement is possible.
The inner peripheral portion of the outer plate 24 around the hole 28 and the outer peripheral portion of the upright plate portion 2604 facing the hole 28 have contours of the upright plate portion 2604 as they approach the upper structure 12 that can be engaged with each other and face each other. Increasing inclined surfaces 24A and 26A are formed.
The surface on which the outer plate 24 is attached to the lower structure 14 and the surface of the substrate portion 2602 located opposite to the surface attached to the seismic isolation laminated rubber 10 are located on the same surface. Yes.
In the present embodiment, the height of the upright plate portion 2604 is made equal to the thickness of the outer plate 24.
According to the fourth embodiment, the same effect as that of the second embodiment is achieved, and further, since the upright plate portion 2604 having the inclined surface 26A is provided, the seismic isolation laminated rubber 10 can be lifted more smoothly. It is advantageous in carrying out.
In this embodiment, since the height of the upright plate portion 2604 is equal to the thickness of the outer plate 24, the outer peripheral portion of the inner plate 26 can be prevented from being caught with respect to the inner peripheral portion of the outer plate 24. This is advantageous for smoother lifting of the seismic laminated rubber 10.

図５（Ｃ）に示す第５の実施の形態は、第４の実施の形態に、つば部２６０６を加えたものである。
すなわち、内側プレートは、免震用積層ゴム１０が取着され外側プレート２４の厚さよりも小さい寸法の厚さを有する基板部２６０２と、基板部２６０２の外周から免震用積層ゴム１０に臨むように起立された起立板部２６０４と、起立板部２６０４の先部の外周から基板部２６０２から離れる方向に突設されたつば部２６０６とを有している。つば部２６０６は、起立板部２６０４の先部の外周に全周にわたって延在していてもよく、あるいは、起立板部２６０４の先部の外周に周方向に間隔をおいて複数設けるようにしてもよい。
そして、起立板部２６０４の外周部が、外側プレート２４の孔２８に移動可能に挿入されている。
外側プレート２４の孔２８の周囲の内周部と、孔２８に臨む起立板部２６０４の外周部には、互いに係合可能で対向する上部の構造体１２に近づくにつれて起立板部２６０４の輪郭を大きくする傾斜面２４Ａ、２６Ａがそれぞれ形成されている。
そして、外側プレート２４が下部の構造体１４に取着される面と、免震用積層ゴム１０に取着された面と反対に位置する基板部２６０２の面とは同一面上に位置し、かつ、つば部２６０６と外側プレート２４との間に上下方向に沿った隙間Ｓが確保されている。
第５の実施の形態によれば、第４の実施の形態と同様な効果が奏され、さらに、つば部２６０６を備えるので、免震用積層ゴム１０の浮き上がり時に内側プレート２６が水平面に対して傾いた際に、つば部２６０６が外側プレート２４に当接することで内側プレート２６に働く圧縮力を分散できる点で有利となる。 In the fifth embodiment shown in FIG. 5C, a collar portion 2606 is added to the fourth embodiment.
That is, the inner plate faces the base-isolated laminated rubber 10 from the outer periphery of the base plate portion 2602 having the thickness smaller than the thickness of the outer plate 24 to which the base-isolated multi-layer rubber 10 is attached. And a collar portion 2606 that protrudes in a direction away from the base plate portion 2602 from the outer periphery of the tip portion of the standing plate portion 2604. The collar portion 2606 may extend over the entire circumference of the tip portion of the upright plate portion 2604, or a plurality of collar portions 2606 may be provided at intervals in the circumferential direction on the outer periphery of the tip portion of the standup plate portion 2604. Also good.
And the outer peripheral part of the standing board part 2604 is inserted in the hole 28 of the outer side plate 24 so that a movement is possible.
The inner peripheral portion of the outer plate 24 around the hole 28 and the outer peripheral portion of the upright plate portion 2604 facing the hole 28 have contours of the upright plate portion 2604 as they approach the upper structure 12 that can be engaged with each other and face each other. Increasing inclined surfaces 24A and 26A are formed.
The surface on which the outer plate 24 is attached to the lower structure 14 and the surface of the substrate portion 2602 positioned opposite to the surface attached to the seismic isolation laminated rubber 10 are located on the same surface. In addition, a gap S along the vertical direction is secured between the collar portion 2606 and the outer plate 24.
According to the fifth embodiment, the same effect as that of the fourth embodiment is achieved, and further, since the collar portion 2606 is provided, the inner plate 26 is in a horizontal plane when the seismic isolation laminated rubber 10 is lifted. When tilted, the flange portion 2606 comes into contact with the outer plate 24, which is advantageous in that the compressive force acting on the inner plate 26 can be dispersed.

なお、本実施の形態では、上下のフランジプレート２２のうちの下側のフランジプレート２２のみを、外側プレート２４と内側プレート２６とで構成した場合について説明したが、上側のフランジプレート２２のみを外側プレート２４と内側プレート２６とで構成してもよく、あるいは、上下のフランジプレート２２の双方を、外側プレート２４と内側プレート２６とで構成してもよい。   In the present embodiment, the description has been given of the case where only the lower flange plate 22 of the upper and lower flange plates 22 is constituted by the outer plate 24 and the inner plate 26, but only the upper flange plate 22 is disposed on the outer side. The plate 24 and the inner plate 26 may be configured, or both the upper and lower flange plates 22 may be configured by the outer plate 24 and the inner plate 26.

８……免震装置、１０……免震用積層ゴム、１２……上部の構造体、１４……下部の構造体、２２……フランジプレート、２４……外側プレート２４……内側プレート２６Ａ、２６Ａ……傾斜面、２６０２……基板部、２６０４……起立板部、２６０６……つば部２６０６、２８……孔。   8: Seismic isolation device, 10: Laminated rubber for seismic isolation, 12 ... Upper structure, 14 ... Lower structure, 22 ... Flange plate, 24 ... Outer plate 24 ... Inner plate 26A, 26A: Inclined surface, 2602: Substrate portion, 2604: Standing plate portion, 2606: Collar portion 2606, 28: Hole.

Claims (7)

上部の構造体と下部の構造体との間に設けられる免震装置であって、
前記免震装置は、免震用積層ゴムと、この免震用積層ゴムの上下にそれぞれ接合され前記上部の構造体または前記下部の構造体に取着される上下のフランジプレートとを備え、
前記上下のフランジプレートの少なくとも一方は、前記構造体に取着され内側に孔が形成された外側プレートと、前記免震用積層ゴムに取着され前記孔に移動可能に挿入された内側プレートとで構成され、
前記外側プレートの前記孔の周囲の内周部と、前記孔に臨む前記内側プレートの外周部には、互いに係合可能で対向する構造体に近づくにつれて前記内側プレートの断面積を大きくする傾斜面がそれぞれ形成されている、
ことを特徴とする免震装置。 A seismic isolation device provided between an upper structure and a lower structure,
The seismic isolation device comprises a seismic isolation laminated rubber, and upper and lower flange plates that are respectively joined to the upper and lower structures of the seismic isolation laminated rubber and attached to the upper structure or the lower structure,
At least one of the upper and lower flange plates is an outer plate that is attached to the structure and has a hole formed therein, and an inner plate that is attached to the seismic isolation laminated rubber and is movably inserted into the hole. Consists of
An inner surface of the outer plate around the hole and an outer surface of the inner plate facing the hole are inclined surfaces that increase the cross-sectional area of the inner plate as they approach each other and can be engaged with each other. Are each formed,
A seismic isolation device characterized by that. 前記外側プレートの厚さは前記内側プレートの厚さよりも大きい寸法で形成され、
前記外側プレートが前記構造体に取着される面と、前記免震用積層ゴムに取着された面と反対に位置する前記内側プレートの面とを同一面上に位置させた状態で、前記外側プレートは、前記内側プレートよりも対向する構造体に近づく方向に突出している、
ことを特徴とする請求項１記載の免震装置。 The outer plate has a thickness larger than that of the inner plate,
With the surface on which the outer plate is attached to the structure and the surface of the inner plate positioned opposite to the surface attached to the seismic isolation laminated rubber being positioned on the same surface, The outer plate protrudes in a direction closer to the opposing structure than the inner plate,
The seismic isolation device according to claim 1 . 前記内側プレートの外周部で前記免震用積層ゴムが取着された面と前記傾斜面とが交わる箇所に面取りが施されている、
ことを特徴とする請求項１記載の免震装置。 The chamfered portion of the a seismic isolation laminate rubber attached to the surface and the inclined surface intersects with the outer peripheral portion of the inner plate is applied,
The seismic isolation device according to claim 1. 前記内側プレートは、前記免震用積層ゴムが取着され前記外側プレートの厚さよりも小さい寸法の厚さを有する基板部と、前記基板部の外周から前記免震用積層ゴムに臨むように起立された起立板部とを有し、
前記起立板部の外周部が前記孔に移動可能に挿入され、
前記内側プレート側の前記傾斜面は、前記孔に臨む前記起立板部の外周部に形成され、
前記外側プレートが前記構造体に取着される面と、前記免震用積層ゴムに取着された面と反対に位置する前記基板部の面とは同一面上に位置している、
ことを特徴とする請求項１記載の免震装置。 The inner plate is erected so that the seismic isolation laminated rubber is attached to a base plate having a thickness smaller than the thickness of the outer plate, and the base isolation from the outer periphery of the base plate. An upright plate portion,
The outer peripheral portion of the upright plate portion is movably inserted into the hole,
The inclined surface on the inner plate side is formed on the outer peripheral portion of the upright plate portion facing the hole ,
The surface on which the outer plate is attached to the structure and the surface of the substrate portion located opposite to the surface attached to the seismic isolation laminated rubber are located on the same surface.
The seismic isolation device according to claim 1. 前記内側プレートは、前記免震用積層ゴムが取着され前記外側プレートの厚さよりも小さい寸法の厚さを有する基板部と、前記基板部の外周から前記免震用積層ゴムに臨むように起立された起立板部と、前記起立板部の先部の外周から前記基板部から離れる方向に突設されたつば部とを有し、
前記起立板部の外周部が前記孔に移動可能に挿入され、
前記内側プレート側の前記傾斜面は、前記孔に臨む前記起立板部の外周部に形成され、
前記外側プレートが前記構造体に取着される面と、前記免震用積層ゴムに取着された面と反対に位置する前記基板部の面とは同一面上に位置し、かつ、前記つば部と前記外側プレートとの間に上下方向に沿った隙間が確保されている、
ことを特徴とする請求項１記載の免震装置。 The inner plate is erected so that the seismic isolation laminated rubber is attached to a base plate having a thickness smaller than the thickness of the outer plate, and the base isolation from the outer periphery of the base plate. The raised plate portion, and a flange portion protruding from the outer periphery of the tip portion of the upright plate portion in a direction away from the substrate portion,
The outer peripheral portion of the upright plate portion is movably inserted into the hole,
The inclined surface on the inner plate side is formed on the outer peripheral portion of the upright plate portion facing the hole ,
The surface on which the outer plate is attached to the structure and the surface of the substrate portion located opposite to the surface attached to the seismic isolation laminated rubber are located on the same surface, and the collar A gap along the vertical direction is secured between the portion and the outer plate,
The seismic isolation device according to claim 1. 前記外側プレートは、前記孔の周方向に沿って分割された複数の分割体で構成されている、
ことを特徴とする請求項１記載の免震装置。 The outer plate is composed of a plurality of divided bodies divided along the circumferential direction of the hole.
The seismic isolation device according to claim 1. 前記孔の断面および前記内側プレートは円形または多角形で形成されている、
ことを特徴とする請求項１記載の免震装置。 The cross section of the hole and the inner plate are formed in a circular or polygonal shape,
The seismic isolation device according to claim 1.
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