JP6420991B2

JP6420991B2 - Seismic isolation device

Info

Publication number: JP6420991B2
Application number: JP2014168429A
Authority: JP
Inventors: 佳也中村; 佐々木　聡; 聡佐々木; 佐々木　康人; 康人佐々木; 健一田原; 泉小原
Original assignee: Fujita Corp
Current assignee: Fujita Corp
Priority date: 2014-08-21
Filing date: 2014-08-21
Publication date: 2018-11-07
Anticipated expiration: 2034-08-21
Also published as: JP2016044724A

Description

本発明は、主として塔状比が高い免震構造物や連層耐震壁がある免震構造物などで、地震時に引抜き力が作用する箇所に設置される免震装置に関するものである。 The present invention, in mainly to base isolation structures Slender ratio is higher seismic isolation structures and Shear Walls, those related to immune ShinSo location of pulling force during earthquake Ru is installed in locations exposed to.

高層あるいは塔状比（高さ／幅）の高い免震構造物は、建物の重心が高く、地震時に転倒モーメントが発生し、建物端部に設置される免震装置の軸方向に過大な引抜き力が生じやすい。また連層耐震壁がある免震構造物では、連層耐震壁直下に設置される免震装置の軸方向に過大な引抜き力が生じやすい。鉛直支持している建物荷重を上回る引抜き力が生じると、免震装置に引っ張り力が作用する。
積層ゴムは、圧縮荷重に対しては強く、大きな圧縮荷重を支持して水平方向に小さな剛性で大きく変位できるが、引張り荷重に対しては弱いので、過大な引張り荷重が作用すると、免震装置としての特性が発揮できなくなり、最悪の場合破断してしまう可能性がある。対策としては、（１）引張り荷重が作用しないように設計するか、（２）引張り荷重が作用しても抵抗できる免震装置を使用するか、（３）積層ゴムに引張り荷重が作用しないような工夫をする、の３種類が考えられる。（１）の方法が一般に採用されるが、建物の形状から（１）の対策を採れない場合もある。そこで（２）、（３）の方法を採用することになるが、（２）の代表的な従来技術は、リニアガイドを用いた装置のみである。（３）の技術はいくつかあり公知となっている（例えば、特許文献１：特開２００６−２２６３８７、特許文献２：特開平１１−１５３１９１、特許文献３：特開２００３−１９４１４６、特許文献４：特許４３３０１７１）。（３）の従来技術について以下に少し説明をする。 A high-rise or tower-shaped ratio (height / width) seismic isolation structure has a high center of gravity of the building, a tipping moment is generated during an earthquake, and excessive pulling out in the axial direction of the seismic isolation device installed at the end of the building Power is likely to be generated. Moreover, in a base-isolated structure with a multi-layer seismic wall, an excessive pulling force tends to be generated in the axial direction of the seismic isolation device installed immediately below the multi-layer seismic wall. When a pulling force exceeding the building load that is supported vertically is generated, a pulling force acts on the seismic isolation device.
Laminated rubber is strong against compressive load and supports large compressive load and can be displaced large with small rigidity in the horizontal direction, but it is weak against tensile load, so if an excessive tensile load is applied, the seismic isolation device As a result, the characteristic cannot be exhibited, and in the worst case, it may break. As countermeasures, (1) design so that the tensile load does not act, (2) use a seismic isolation device that can resist even if the tensile load acts, or (3) prevent the tensile load from acting on the laminated rubber. Three types are possible. Although the method (1) is generally adopted, the measure (1) may not be taken due to the shape of the building. Therefore, the methods (2) and (3) will be adopted, but the typical prior art of (2) is only an apparatus using a linear guide. There are several techniques of (3) and are known (for example, Patent Document 1: Japanese Patent Laid-Open No. 2006-226387, Patent Document 2: Japanese Patent Laid-Open No. 11-153191, Patent Document 3: Japanese Patent Laid-Open No. 2003-194146, Patent Document 4). : Patent 4330171). The prior art (3) will be described a little below.

特許文献１は、積層ゴム下部フランジプレートの周辺に下部構造との間に、翼状鋼板を取り付けたもので、鋼板の面内剛性は大きく面外剛性は小さい特徴を活かし、積層ゴムに引っ張り力が作用したとき、翼状鋼板が面外変形を生じて積層ゴムが下部構造から離れて浮き上がり、積層ゴムに引っ張り力が作用しないようにしたものである。
特許文献２〜４は、いずれも積層ゴム下部フランジプレートを下部構造に固定するアンカーボルトに工夫をしたもので、アンカーボルトとフランジプレートの間に弾性体を設置し、積層ゴムに引っ張り力が作用したときに、弾性体が変形し、積層ゴムが下部構造から離れて浮き上がり、積層ゴムに引っ張り力が作用しないようにしたものである。特許文献２は弾性体としてゴムシート、特許文献３は弾性体として皿ばね、特許文献４は弾性体としてリング状ゴム等を使用したものである。 In Patent Document 1, a winged steel plate is attached to the periphery of the laminated rubber lower flange plate between the lower structure, and the tensile strength is exerted on the laminated rubber by utilizing the feature that the in-plane rigidity of the steel plate is large and the out-of-plane rigidity is small. When acting, the winged steel plate undergoes out-of-plane deformation, and the laminated rubber is lifted away from the lower structure, so that a tensile force does not act on the laminated rubber.
Patent Documents 2 to 4 are all devised as an anchor bolt that fixes the laminated rubber lower flange plate to the lower structure. An elastic body is installed between the anchor bolt and the flange plate, and a tensile force acts on the laminated rubber. In this case, the elastic body is deformed, and the laminated rubber is lifted away from the lower structure so that a tensile force does not act on the laminated rubber. Patent Document 2 uses a rubber sheet as an elastic body, Patent Document 3 uses a disc spring as an elastic body, and Patent Document 4 uses a ring-shaped rubber or the like as an elastic body.

特開２００６−２２６３８７JP 2006-226387A 特開平１１−１５３１９１JP-A-11-153191 特開２００３−１９４１４６JP 2003-194146 A 特許４３３０１７１Patent 4330171

建物の形状及びそのほかの理由で、引抜き力がどうしても発生する場合の対策として、積層ゴムタイプの免震装置であればゴム断面積が大きなものを採用する方法や引抜きに抵抗できる免震装置を採用する方法が考えられるが、いずれもコストが高くなってしまう。
積層ゴムタイプの免震装置で引抜きに対応するため積層ゴムを下部構造から浮上させ積層ゴムに引張力をさせないような従来技術がいくつかあるが、それぞれ欠点がある。
特許文献１は、積層ゴム周辺に大きなスペースが必要となること、鋼板を大量のアンカーボルトで固定しなければならず施工が大変である、鋼板なので錆等の耐久性対策が必要であることなどが欠点として挙げられる。
特許文献２は、ゴムシートを入れているだけなので、積層ゴムの浮上量が小さい。引抜き力が大きくなると、ゴムシートの圧縮変形が大きくなり破損してしまう可能性があるなどの欠点が挙げられる。 As countermeasures against the occurrence of pulling force due to the shape of the building and other reasons, a laminated rubber type seismic isolation device adopts a method with a large rubber cross-sectional area or a seismic isolation device that can resist pulling. Although the method of doing it can be considered, cost will become high in any case.
There are some conventional techniques in which a laminated rubber is levitated from the lower structure in order to cope with pulling out with a laminated rubber type seismic isolation device.
In Patent Document 1, a large space is required around the laminated rubber, the steel plate must be fixed with a large amount of anchor bolts, and the construction is difficult. The steel plate requires durability measures such as rust. Is mentioned as a drawback.
Since Patent Document 2 only includes a rubber sheet, the floating amount of the laminated rubber is small. When the pulling force is increased, the rubber sheet may be compressed and deformed and may be damaged.

特許文献３は、アンカーボルトに比べ冶具が大きく皿ばねを使用しているのでさらに大きい、錆等の耐久性対策が必要、設置時に皿ばねの予圧縮管理が必要で施工が大変である、などの欠点が挙げられる。
特許文献４は、アンカーボルトに比べ冶具が大きい、アンカーボルトと積層ゴム下部フランジレートとは水平方向に隙間があり、せん断力伝達のための機構が別途必要であることなどの欠点が挙げられる。
本発明の目的は、簡単な構造で、大きなスペースが必要とせず、設置が簡単で、積層ゴムにせん断力は伝達するが引っ張り力はできるだけ伝達しないような免震装置を提供することにある。 In Patent Document 3, the jig is larger than the anchor bolt and uses a disc spring, so it is even larger. Durability measures such as rust are necessary. Pre-compression management of the disc spring is necessary at the time of installation. There are disadvantages.
Patent Document 4 has drawbacks such that the jig is larger than the anchor bolt, the anchor bolt and the laminated rubber lower flange rate have a gap in the horizontal direction, and a mechanism for transmitting shear force is required separately.
An object of the present invention, a simple structure, without large space required, installation is simple, shear force to the laminated rubber are but tensile force transmission is to provide a seismic ShinSo location as little as possible transfer .

前記目的を達成するため本発明は、免震用積層ゴムと、前記免震積層用ゴムの上部に設けられ上部の構造体に取着される上部のフランジプレートと、前記免震積層用ゴムの下部に設けられアンカーボルトを介して下部の構造体に取着される下部のフランジプレートとを備える免震装置であって、内側鋼管と、前記内側鋼管の外周面に薄肉の筒状のゴムシートと薄肉の鋼管とが前記内側鋼管の半径方向外側に交互に積層されて構成された筒状積層ゴムと、前記筒状積層ゴムの外周面に取着された外側鋼管とを備え、前記内側鋼管の内側の空間は前記アンカーボルトの軸部を挿通させるボルト挿通孔とされたボルト取り付け用積層ゴムが設けられ、前記ボルト挿通孔に挿通された前記アンカーボルトを介して前記フランジプレートが前記構造体に取着された状態で、前記外側鋼管は前記フランジプレートが前記構造体から離れる方向に対して一体に変位するように前記フランジプレートに結合され、前記内側鋼管は前記アンカーボルトに対して前記フランジプレートが前記構造体から離れる方向に対して変位不能に結合され、前記筒状積層ゴムは鉛直方向にせん断変形可能な状態となっており、前記筒状積層ゴムの鉛直方向の変形量の上限を規制する規制手段が設けられ、前記ボルト挿通孔に挿通された前記アンカーボルトを介して前記フランジプレートが前記構造体に取着された状態で、前記筒状積層ゴムに、前記免震用積層ゴムを鉛直方向に引っ張る方向と反対の方向に予め荷重が掛けられていることを特徴とする。 In order to achieve the above object, the present invention provides a seismic isolation laminated rubber, an upper flange plate provided on an upper part of the seismic isolation laminating rubber, and attached to an upper structure, and the seismic isolation laminating rubber. A seismic isolation device including a lower flange plate provided at a lower portion and attached to a lower structure via an anchor bolt, and an inner steel pipe and a thin cylindrical rubber sheet on an outer peripheral surface of the inner steel pipe And a thin steel pipe are alternately laminated on the radially outer side of the inner steel pipe, and a cylindrical laminated rubber, and an outer steel pipe attached to the outer peripheral surface of the cylindrical laminated rubber, the inner steel pipe The inner space is provided with a bolt mounting laminated rubber which is a bolt insertion hole through which the shaft portion of the anchor bolt is inserted, and the flange plate is connected to the structure via the anchor bolt inserted into the bolt insertion hole. In In the attached state, the outer steel pipe is coupled to the flange plate so that the flange plate is integrally displaced in a direction away from the structure, and the inner steel pipe is connected to the anchor bolt with respect to the flange plate. The cylindrical laminated rubber is coupled so as not to be displaceable in a direction away from the structure, and the cylindrical laminated rubber is in a state in which the cylindrical laminated rubber can be shear-deformed in a vertical direction. regulating means provided et al is, in a state in which the flange plate through an insertion has been the anchor bolt into the bolt insertion hole is attached to said structure, the tubular laminated rubber, the seismic isolation laminate rubber A load is applied in advance in a direction opposite to the direction of pulling in the vertical direction .

また、本発明は、免震用積層ゴムと、前記免震積層用ゴムの上部に設けられ上部の構造体に取着される上部のフランジプレートと、前記免震積層用ゴムの下部に設けられアンカーボルトを介して下部の構造体に取着される下部のフランジプレートとを備える免震装置であって、内側鋼管と、前記内側鋼管の外周面に薄肉の筒状のゴムシートと薄肉の鋼管とが前記内側鋼管の半径方向外側に交互に積層されて構成された筒状積層ゴムと、前記筒状積層ゴムの外周面に取着された外側鋼管とを備え、前記内側鋼管の内側の空間は前記アンカーボルトの軸部を挿通させるボルト挿通孔とされたボルト取り付け用積層ゴムが設けられ、前記ボルト挿通孔に挿通された前記アンカーボルトを介して前記フランジプレートが前記構造体に取着された状態で、前記外側鋼管は前記フランジプレートが前記構造体から離れる方向に対して一体に変位するように前記フランジプレートに結合され、前記内側鋼管は前記アンカーボルトに対して前記フランジプレートが前記構造体から離れる方向に対して変位不能に結合され、前記筒状積層ゴムは鉛直方向にせん断変形可能な状態となっており、前記筒状積層ゴムの鉛直方向の変形量の上限を規制する規制手段が設けられ、前記アンカーボルトの頭部下面は、前記外側鋼管の前記構造体から離れた側の軸方向の端面に当接可能に形成され、前記アンカーボルトの頭部寄りの軸部の箇所に、前記内側鋼管の外径以下の寸法の外径を有し前記内側鋼管に当接可能な当接部が設けられ、前記フランジプレートにボルト挿通孔が形成されると共に、前記構造体から離れた側の前記ボルト挿通孔の箇所に、前記フランジプレートが前記外側鋼管と共に前記構造体から離れる方向で鉛直方向に変位した際に前記内側鋼管および前記筒状積層ゴムの収容を可能とした収容凹部が設けられ、前記ボルト挿通孔に挿通された前記アンカーボルトを介して前記フランジプレートが前記構造体に取着された状態で、前記当接部と前記内側鋼管とが当接し、前記外側鋼管の前記構造体側の軸方向の端面が前記収容凹部の周囲の前記下部フランジプレートの箇所に当接し、前記外側鋼管の前記構造体から離れた側の軸方向の端面が前記アンカーボルトの頭部下面から離れた箇所に位置していることを特徴とする。
また、本発明は、免震用積層ゴムと、前記免震積層用ゴムの上部に設けられ上部の構造体に取着される上部のフランジプレートと、前記免震積層用ゴムの下部に設けられアンカーボルトを介して下部の構造体に取着される下部のフランジプレートとを備える免震装置であって、内側鋼管と、前記内側鋼管の外周面に薄肉の筒状のゴムシートと薄肉の鋼管とが前記内側鋼管の半径方向外側に交互に積層されて構成された筒状積層ゴムと、前記筒状積層ゴムの外周面に取着された外側鋼管とを備え、前記内側鋼管の内側の空間は前記アンカーボルトの軸部を挿通させるボルト挿通孔とされたボルト取り付け用積層ゴムが設けられ、前記ボルト挿通孔に挿通された前記アンカーボルトを介して前記フランジプレートが前記構造体に取着された状態で、前記外側鋼管は前記フランジプレートが前記構造体から離れる方向に対して一体に変位するように前記フランジプレートに結合され、前記内側鋼管は前記アンカーボルトに対して前記フランジプレートが前記構造体から離れる方向に対して変位不能に結合され、前記筒状積層ゴムは鉛直方向にせん断変形可能な状態となっており、前記筒状積層ゴムの鉛直方向の変形量の上限を規制する規制手段が設けられ、前記アンカーボルトの頭部下面は、前記内側鋼管の外径以下の寸法の外径を有し前記内側鋼管の軸方向の一方の端面に当接可能に形成され、前記フランジプレートにボルト挿通孔が形成されると共に、前記構造体から離れた側の前記ボルト挿通孔の箇所に、前記フランジプレートが前記外側鋼管と共に前記構造体から離れる方向で鉛直方向に変位した際に前記内側鋼管および前記筒状積層ゴムの収容を可能とし、かつ、前記内側鋼管の軸方向の他方の端面に当接可能な底面を有する収容凹部が設けられ、前記ボルト挿通孔に挿通された前記アンカーボルトを介して前記フランジプレートが前記構造体に取着された状態で、前記アンカーボルトの頭部下面と前記内側鋼管の軸方向の一方の端面とが当接すると共に前記外側鋼管の軸方向の一方の端面が前記下部フランジプレートに当接し、前記内側鋼管および前記筒状積層ゴムが鉛直方向において前記フランジプレートが前記構造体から離れる方向で前記収容凹部の外部の箇所に位置していることを特徴とする。 In addition, the present invention is provided in the seismic isolation laminated rubber, the upper flange plate provided on the upper part of the seismic isolation rubber and attached to the upper structure, and the lower part of the seismic isolation rubber. A seismic isolation device comprising a lower flange plate attached to a lower structure via an anchor bolt, wherein the inner steel pipe, and a thin cylindrical rubber sheet and a thin steel pipe on the outer peripheral surface of the inner steel pipe A cylindrical laminated rubber that is alternately laminated on the radially outer side of the inner steel pipe, and an outer steel pipe attached to the outer peripheral surface of the cylindrical laminated rubber, and a space inside the inner steel pipe Is provided with a bolt mounting laminated rubber which is a bolt insertion hole through which the shaft portion of the anchor bolt is inserted, and the flange plate is attached to the structure through the anchor bolt inserted into the bolt insertion hole. In the state The outer steel pipe is coupled to the flange plate so that the flange plate is integrally displaced with respect to a direction away from the structure, and the inner steel pipe is in a direction in which the flange plate is separated from the structure with respect to the anchor bolt. displacement incapable of being coupled to, the tubular laminated rubber has become a vertically permit shearing deformation state, restricting means for restricting the upper limit of the vertical deformation of the tubular laminated rubber Re et provided The bottom surface of the head of the anchor bolt is formed so as to be able to abut on the end surface of the outer steel pipe on the side away from the structure, and the inner side of the anchor bolt is positioned near the head. A contact portion that has an outer diameter that is less than or equal to the outer diameter of the steel pipe and that can contact the inner steel pipe is provided, and a bolt insertion hole is formed in the flange plate. The housing that can accommodate the inner steel pipe and the cylindrical laminated rubber when the flange plate is displaced in the vertical direction in a direction away from the structure together with the outer steel pipe at the location of the bolt insertion hole on the left side. In the state where the recess is provided and the flange plate is attached to the structure via the anchor bolt inserted through the bolt insertion hole, the contact portion and the inner steel tube are in contact with each other, and the outer steel tube The end face in the axial direction on the structure side is in contact with the position of the lower flange plate around the receiving recess, and the end face in the axial direction on the side away from the structure of the outer steel pipe is the bottom surface of the head of the anchor bolt It is located in the place away from .
In addition, the present invention is provided in the seismic isolation laminated rubber, the upper flange plate provided on the upper part of the seismic isolation rubber and attached to the upper structure, and the lower part of the seismic isolation rubber. A seismic isolation device comprising a lower flange plate attached to a lower structure via an anchor bolt, wherein the inner steel pipe, and a thin cylindrical rubber sheet and a thin steel pipe on the outer peripheral surface of the inner steel pipe A cylindrical laminated rubber that is alternately laminated on the radially outer side of the inner steel pipe, and an outer steel pipe attached to the outer peripheral surface of the cylindrical laminated rubber, and a space inside the inner steel pipe Is provided with a bolt mounting laminated rubber which is a bolt insertion hole through which the shaft portion of the anchor bolt is inserted, and the flange plate is attached to the structure through the anchor bolt inserted into the bolt insertion hole. In the state The outer steel pipe is coupled to the flange plate so that the flange plate is integrally displaced with respect to a direction away from the structure, and the inner steel pipe is in a direction in which the flange plate is separated from the structure with respect to the anchor bolt. displacement incapable of being coupled to, the tubular laminated rubber has become a vertically permit shearing deformation state, restricting means for restricting the upper limit of the vertical deformation of the tubular laminated rubber Re et provided The bottom surface of the head of the anchor bolt has an outer diameter that is less than or equal to the outer diameter of the inner steel pipe, and is formed so as to be able to contact one end face in the axial direction of the inner steel pipe. In the direction where the flange plate is separated from the structure together with the outer steel pipe, the lead is inserted into the bolt insertion hole on the side away from the structure. The inner steel pipe and the cylindrical laminated rubber can be accommodated when displaced in the direction, and an accommodating recess having a bottom surface capable of contacting the other end face in the axial direction of the inner steel pipe is provided, and the bolt insertion With the flange plate attached to the structure through the anchor bolt inserted through the hole, the lower surface of the head of the anchor bolt and one end surface in the axial direction of the inner steel pipe abut and One end surface in the axial direction of the outer steel pipe is in contact with the lower flange plate, and the inner steel pipe and the cylindrical laminated rubber are in a vertical direction at a place outside the housing recess in a direction in which the flange plate is separated from the structure. It is located .

本発明によれば、免震用積層ゴムに軸方向の引っ張り力が作用したとき、筒状積層ゴムが上下方向にせん断変形し、免震装置は下部構造体から浮き上がり、免震用積層ゴムの引張り変形を小さく抑えることができる。したがって、何らスペースを確保することなく、しかも簡単に施工でき、免震用積層ゴムの破断、損傷を防止する上で有利となる。
また、本発明によれば、部品点数の削減化、施工の簡単化を図れ、免震装置のコンパクト化を図る上で有利となる。
また、本発明によれば、筒状積層ゴムの鉛直方向のせん断変形を、筒状積層ゴムの特性が変化しない範囲に収まるように設定でき、筒状積層ゴムの耐久性を確保する上で有利となる。
また、本発明によれば、免震用積層ゴムに軸方向の引っ張り力が作用したとき、筒状積層ゴムが上下方向にせん断変形し、免震装置は下部構造体から浮き上がり、免震用積層ゴムの引張り変形を小さく抑えることができる。したがって、何らスペースを確保することなく、しかも簡単に施工でき、ボルト取り付け用積層ゴムは破損することもなく、免震用積層ゴムに作用する引張り荷重を低減でき、免震用積層ゴムの破断、損傷を防止する上で有利となる。
また、本発明によれば、部品点数の削減化、施工の簡単化を図れ、免震装置のコンパクト化を図る上で有利となる。
また、本発明によれば、ボルト取り付け用積層ゴムを予め下部フランジプレートに取り付けておくことで、従来と同様な施工手順で免震装置を設置でき、施工の簡単化、免震装置のコンパクト化を図る上で有利となる。
また、本発明によれば、前記筒状積層ゴムに予め掛ける荷重の値を適宜設定することで、免震装置が浮上する引抜き力を任意に設定できる。 According to the present invention, when an axial tensile force acts on the seismic isolation laminated rubber, the cylindrical laminated rubber shears in the vertical direction, and the seismic isolation device rises from the lower structure, and the seismic isolation laminated rubber Tensile deformation can be kept small. Therefore, it is easy to construct without securing any space, which is advantageous in preventing breakage and damage of the seismic isolation laminated rubber.
Further , according to the present invention, the number of parts can be reduced and the construction can be simplified, which is advantageous in reducing the size of the seismic isolation device.
Further , according to the present invention, the vertical shear deformation of the cylindrical laminated rubber can be set within a range in which the characteristics of the cylindrical laminated rubber do not change, which is advantageous in ensuring the durability of the cylindrical laminated rubber. It becomes.
Further , according to the present invention, when an axial tensile force acts on the seismic isolation laminated rubber, the cylindrical laminated rubber is shear-deformed in the vertical direction, and the seismic isolation device is lifted from the lower structure, and the seismic isolation laminate The tensile deformation of rubber can be kept small. Therefore, it is possible to easily install without securing any space, the laminated rubber for bolt mounting is not damaged, the tensile load acting on the laminated rubber for seismic isolation can be reduced, the fracture of the laminated rubber for seismic isolation, This is advantageous in preventing damage.
Further , according to the present invention, the number of parts can be reduced and the construction can be simplified, which is advantageous in reducing the size of the seismic isolation device.
In addition, according to the present invention, by attaching the laminated rubber for bolts to the lower flange plate in advance, the seismic isolation device can be installed in the same construction procedure as before, simplifying the construction, making the seismic isolation device compact. This is advantageous in achieving this.
Moreover, according to this invention, the drawing force which a seismic isolation apparatus floats can be arbitrarily set by setting the value of the load applied beforehand to the said cylindrical laminated rubber suitably.

また、本発明によれば、外側鋼管の外周部および下部フランジプレートにねじ加工をする必要がなく、加工、設置が容易であるという利点がある。
また、本発明によれば、アンカーボルトとナットを利用して当接部を簡単に得ることができる。
また、本発明によれば、アンカーボルトと外側鋼管を利用して規制手段を簡単に得ることができる。
また、本発明によれば、免震装置に用いられ免震用積層ゴムの破断、損傷を防止する上で有利となる。
また、本発明によれば、ボルト取り付け用積層ゴムの取り扱い性や保管性を向上できる。 Further , according to the present invention, there is an advantage that it is not necessary to thread the outer peripheral portion of the outer steel pipe and the lower flange plate, and the processing and installation are easy.
In addition, according to the present invention, the contact portion can be easily obtained using the anchor bolt and the nut.
Further , according to the present invention, the restricting means can be easily obtained using the anchor bolt and the outer steel pipe.
Moreover, according to this invention, it is advantageous when preventing the fracture | rupture and damage of the laminated rubber for seismic isolation used for a seismic isolation apparatus.
Moreover, according to this invention, the handleability and storage property of the laminated rubber for bolt attachment can be improved.

第１の実施の形態の説明図で、（Ａ）は免震装置の設置状態を示し、（Ｂ）は免震用積層ゴムに引っ張り力が作用し免震装置が下部構造体から浮き上がった状態を示している。It is explanatory drawing of 1st Embodiment, (A) shows the installation state of a seismic isolation apparatus, (B) is the state which tensile force acted on the laminated rubber for seismic isolation, and the seismic isolation apparatus lifted from the lower structure Is shown. （Ａ）はアンカーボルトの正面図、（Ｂ）はボルト取り付け用積層ゴムの断面正面図、（Ｃ）は同平面図である。(A) is a front view of an anchor bolt, (B) is a sectional front view of a laminated rubber for bolt attachment, and (C) is a plan view of the same. 第２の実施の形態の説明図である。It is explanatory drawing of 2nd Embodiment. 第３の実施の形態の説明図で、（Ａ）は免震装置の設置状態を示し、（Ｂ）は免震用積層ゴムに引っ張り力が作用し免震装置が下部構造体から浮き上がった状態を示している。It is explanatory drawing of 3rd Embodiment, (A) shows the installation state of a seismic isolation apparatus, (B) is the state which tensile force acted on the laminated rubber for seismic isolation, and the seismic isolation apparatus lifted from the lower structure Is shown. 第４の実施の形態の説明図で、（Ａ）は免震装置の設置状態を示し、（Ｂ）は免震用積層ゴムに引っ張り力が作用し免震装置が下部構造体から浮き上がった状態を示している。It is explanatory drawing of 4th Embodiment, (A) shows the installation state of a seismic isolation apparatus, (B) is the state which tensile force acted on the laminated rubber for seismic isolation, and the seismic isolation apparatus lifted from the lower structure Is shown. 第５の実施の形態の説明図で、（Ａ）は免震装置の設置状態を示し、（Ｂ）は免震用積層ゴムに引っ張り力が作用し免震装置が下部構造体から浮き上がった状態を示している。It is explanatory drawing of 5th Embodiment, (A) shows the installation state of a seismic isolation apparatus, (B) is the state which tensile force acted on the laminated rubber for seismic isolation, and the seismic isolation apparatus lifted from the lower structure Is shown. 第１の実施の形態において免震用積層ゴムに作用する引っ張り荷重と免震装置の鉛直方向変位の関係図である。It is a related figure of the tensile load which acts on the laminated rubber for seismic isolation in 1st Embodiment, and the vertical direction displacement of a seismic isolation apparatus. 第３の実施の形態において免震用積層ゴムに作用する引っ張り荷重と免震装置の鉛直方向変位の関係図である。It is a related figure of the tensile load which acts on the laminated rubber for seismic isolation in 3rd Embodiment, and the vertical direction displacement of a seismic isolation apparatus. （Ａ）、（Ｂ）は、内側鋼管が省略されアンカーボルトに筒状積層ゴムが一体化された実施の形態の説明図である。(A), (B) is explanatory drawing of embodiment by which an inner side steel pipe was abbreviate | omitted and the cylindrical laminated rubber was integrated with the anchor bolt. （Ａ）、（Ｂ）は、外側鋼管が省略されフランジプレートに筒状積層ゴムが一体化された実施の形態の説明図である。(A), (B) is explanatory drawing of embodiment by which an outer side steel pipe was abbreviate | omitted and the cylindrical laminated rubber was integrated with the flange plate.

以下、本発明の実施の形態を図面にしたがって説明する。
図１、図２を参照して、まず、第１の実施の形態から説明すると、免震装置１０は、上部構造体（不図示）と下部構造体１２との間に設けられ、下部構造体１２上において上部構造体を免震支持するものである。
ここで下部構造体１２とは、例えば、基礎や建物であり、上部構造体とは、建物や柱、床などであり、免震装置１０はこのような上部構造体と下部構造体１２との間に複数設けられる。
免震装置１０は、免震用積層ゴム１４と、免震用積層ゴム１４の上部に接合された上部フランジプレート（不図示）と、免震用積層ゴム１４の下部に接合された下部フランジプレート１６と、下部フランジプレート１６に設けられたボルト取り付け用積層ゴム２０と、規制手段２２とを備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
With reference to FIG. 1 and FIG. 2, first, from the first embodiment, the seismic isolation device 10 is provided between an upper structure (not shown) and a lower structure 12, and the lower structure The upper structure is supported by seismic isolation.
Here, the lower structure 12 is, for example, a foundation or a building, and the upper structure is a building, a column, a floor, or the like, and the seismic isolation device 10 is formed of such an upper structure and the lower structure 12. A plurality are provided in between.
The seismic isolation device 10 includes an isolation rubber 14, an upper flange plate (not shown) joined to the upper part of the isolation rubber 14, and a lower flange plate joined to the lower part of the isolation rubber 14. 16, a laminated rubber 20 for bolt attachment provided on the lower flange plate 16, and a regulating means 22.

免震用積層ゴム１４は、多数のゴムシート１４０２と鋼板１４０４とが交互に重ねあわされ接合され、内部に、振動エネルギを吸収する鉛プラグ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。
上部フランジプレートは、免震用積層ゴム１４の上部をアンカーボルトを介して上部構造体に取り付けるものであり、下部フランジプレート１６は、免震用積層ゴム１４の下部をアンカーボルト２４を介して下部構造体１２に取り付けるものである。
上部フランジプレートと下部フランジプレート１６は、免震用積層ゴム１４よりも大きい断面で形成され、上部フランジプレートと下部フランジプレート１６の中心と免震用積層ゴム１４の軸心とは合致し、それらプレートの周方向に間隔をおいた複数箇所に、アンカーボルト２４を挿通させるボルト挿通孔２６が形成されている。 The seismic isolation laminated rubber 14 includes a plurality of rubber sheets 1402 and steel plates 1404 that are alternately overlapped and joined, and a lead plug that absorbs vibration energy is inserted or not inserted therein. The present invention applies to both.
The upper flange plate attaches the upper part of the seismic isolation laminated rubber 14 to the upper structure via anchor bolts, and the lower flange plate 16 lowers the lower part of the seismic isolation laminated rubber 14 via anchor bolts 24. It is attached to the structure 12.
The upper flange plate and the lower flange plate 16 are formed with a larger cross section than the seismic isolation laminated rubber 14, and the centers of the upper flange plate and the lower flange plate 16 coincide with the axis of the seismic isolation laminated rubber 14. Bolt insertion holes 26 through which the anchor bolts 24 are inserted are formed at a plurality of locations spaced in the circumferential direction of the plate.

図２（Ｂ）、（Ｃ）に示すように、ボルト取り付け用積層ゴム２０は、内側鋼管３０と、筒状積層ゴム３２と、外側鋼管３４とを備えている。
内側鋼管３０の内側の空間は、アンカーボルト２４の軸部を挿通させるボルト挿通孔２６となっている。
筒状積層ゴム３２は、内側鋼管３０の外周面に薄肉の筒状のゴムシート３２０２と薄肉の鋼管３２０４とが内側鋼管３０と同軸上で内側鋼管３０の半径方向外側に交互に重ね合わされ接合されて構成されている。
外側鋼管３４は、その内周面が筒状積層ゴム３２の外周面に取着され、外側鋼管３４の外周面に雄ねじ３４０２が形成されている。
内側鋼管３０、筒状積層ゴム３２、外側鋼管３４は同軸上に位置し、ボルト挿通孔２６の軸方向に沿った内側鋼管３０、筒状積層ゴム３２、外側鋼管３４の長さは同一の寸法で形成され、軸方向の両端に位置する内側鋼管３０、筒状積層ゴム３２、外側鋼管３４の端面は同一面上に位置している。ボルト取り付け用積層ゴム２０をこのように構成することで、取り扱い性や保管性の向上が図られている。
また、ボルト挿通孔２６の軸方向に沿ったボルト取り付け用積層ゴム２０の長さは、下部フランジプレート１６の厚さと同一の寸法で形成され、後述するようにボルト取り付け用積層ゴム２０が下部フランジプレート１６に取り付けられた状態で、ボルト取り付け用積層ゴム２０の軸方向の両端の端面は、下部フランジプレート１６の上面、下面と同一面上に位置し、免震装置１０の取り扱い性や保管性の向上が図られている。 As shown in FIGS. 2B and 2C, the bolt-attached laminated rubber 20 includes an inner steel pipe 30, a cylindrical laminated rubber 32, and an outer steel pipe 34.
A space inside the inner steel pipe 30 is a bolt insertion hole 26 through which the shaft portion of the anchor bolt 24 is inserted.
In the cylindrical laminated rubber 32, a thin cylindrical rubber sheet 3202 and a thin steel pipe 3204 are alternately overlapped on the outer peripheral surface of the inner steel pipe 30 and coaxially overlapped with the inner steel pipe 30 and radially outward of the inner steel pipe 30. Configured.
The outer peripheral surface of the outer steel pipe 34 is attached to the outer peripheral surface of the cylindrical laminated rubber 32, and a male screw 3402 is formed on the outer peripheral surface of the outer steel pipe 34.
The inner steel pipe 30, the cylindrical laminated rubber 32, and the outer steel pipe 34 are coaxially positioned, and the lengths of the inner steel pipe 30, the cylindrical laminated rubber 32, and the outer steel pipe 34 along the axial direction of the bolt insertion hole 26 are the same dimensions. The end surfaces of the inner steel pipe 30, the cylindrical laminated rubber 32, and the outer steel pipe 34 that are formed at both ends in the axial direction are located on the same plane. By configuring the laminated rubber 20 for bolt attachment in this way, handling and storage are improved.
Also, the length of the laminated rubber 20 for bolt attachment along the axial direction of the bolt insertion hole 26 is formed with the same dimension as the thickness of the lower flange plate 16, and the laminated rubber 20 for bolt attachment is formed in the lower flange as will be described later. When attached to the plate 16, both end faces in the axial direction of the bolt-attached laminated rubber 20 are located on the same plane as the upper and lower surfaces of the lower flange plate 16, so that the seismic isolation device 10 can be handled and stored. Improvements are being made.

ボルト取り付け用積層ゴム２０は、円盤形状をしていて半径方向にゴム３２０２と鋼板（鋼管）３２０４を積層しているので、軸方向（面外方向）の剛性は小さく、半径方向（面内方向）の剛性は大きいので、軸方向に容易にかつ無摩擦で変位することができる。
ボルト取り付け用積層ゴム２０の特性（剛性、強度）は、ゴムの材料、ゴムの形状（１層あたりの厚さ、断面積）、鋼管の厚さ、積層数などで調整可能である。 The bolt-attached laminated rubber 20 has a disk shape and is laminated with a rubber 3202 and a steel plate (steel pipe) 3204 in the radial direction, so that the rigidity in the axial direction (out-of-plane direction) is small and the radial direction (in-plane direction). ) Can be displaced easily and without friction in the axial direction.
The characteristics (rigidity, strength) of the laminated rubber 20 for bolt attachment can be adjusted by the rubber material, the rubber shape (thickness per layer, cross-sectional area), the thickness of the steel pipe, the number of laminated layers, and the like.

ボルト取り付け用積層ゴム２０は、雄ねじ３４０２が下部フランジプレート１６の雌ねじ１６０２に螺合することで下部フランジプレート１６に取り付けられている。すなわち、外側鋼管３４は下部フランジプレート１６が下部構造体１２から離れる方向に対して一体に変位するように下部フランジプレート１６に結合されている。
このようにボルト取り付け用積層ゴム２０が下部フランジプレート１６に取り付けられた状態で、ボルト取り付け用積層ゴム２０の軸方向が上下方向となる。
本実施の形態では、ねじ結合によりボルト取り付け用積層ゴム２０が下部フランジプレート１６に予め取着され、免震装置１０の施工の簡易化が図られている。 The bolt-attached laminated rubber 20 is attached to the lower flange plate 16 by the male screw 3402 being screwed into the female screw 1602 of the lower flange plate 16. That is, the outer steel pipe 34 is coupled to the lower flange plate 16 so that the lower flange plate 16 is integrally displaced with respect to the direction away from the lower structure 12.
In this state where the bolt-attached laminated rubber 20 is attached to the lower flange plate 16, the axial direction of the bolt-attached laminated rubber 20 is the vertical direction.
In the present embodiment, the bolt-attached laminated rubber 20 is attached to the lower flange plate 16 in advance by screw connection, thereby simplifying the construction of the seismic isolation device 10.

アンカーボルト２４の頭部２４０２は、図１、図２（Ａ）に示すように、外側鋼管３４が上方に変位した際に、外側鋼管３４に当接可能な寸法で形成されている。本実施の形態では、筒状積層ゴム３２の上方ヘの変形量の上限を規制する規制手段２２が、アンカーボルト２４の頭部２４０２と外側鋼管３４とで構成されている。なお、規制手段２２は、アンカーボルト２４の頭部２４０２と下部フランジプレート１６とで構成するようにしてもよく、あるいは、下部構造体１２上の取り付けプレート３６に設けられ下部フランジプレート１６に当接可能なL字状のストッパと下部フランジプレート１６で構成するなど、種々考えられるが、アンカーボルト２４の頭部２４０２と、外側鋼管３４や下部フランジプレート１６を利用して規制手段２２を構成すると、部品点数の削減化、免震装置１０のコンパクト化を図る上で有利となる。
アンカーボルト２４の頭部２４０２寄りの軸部２４０４の箇所に、内側鋼管３０の外径以下の寸法の外径を有し内側鋼管３０の上端面に当接可能な当接部２４０６が設けられている。
詳細には、アンカーボルト２４は、頭部２４０２と、頭部２４０２から突設された軸部２４０４と、軸部２４０４の先部に雄ねじが形成された雄ねじ部２４０８と、頭部２４０２の直下の軸部２４０４の箇所に軸部２４０４の外径よりも大きい外径でかつ内側鋼管３０の外径以下の寸法の大径部が設けられ、この大径部が当接部２４０６を構成している。 As shown in FIGS. 1 and 2A, the head portion 2402 of the anchor bolt 24 is formed with a size capable of contacting the outer steel pipe 34 when the outer steel pipe 34 is displaced upward. In the present embodiment, the restricting means 22 that restricts the upper limit of the amount of deformation of the cylindrical laminated rubber 32 upward is constituted by the head 2402 of the anchor bolt 24 and the outer steel pipe 34. The restricting means 22 may be configured by the head 2402 of the anchor bolt 24 and the lower flange plate 16, or provided on the mounting plate 36 on the lower structure 12 and abutting against the lower flange plate 16. Various configurations such as a possible L-shaped stopper and the lower flange plate 16 are conceivable, but when the restricting means 22 is configured using the head 2402 of the anchor bolt 24, the outer steel pipe 34 and the lower flange plate 16, This is advantageous in reducing the number of parts and making the seismic isolation device 10 compact.
An abutting portion 2406 that has an outer diameter that is equal to or smaller than the outer diameter of the inner steel pipe 30 and that can abut on the upper end surface of the inner steel pipe 30 is provided at the shaft portion 2404 near the head portion 2402 of the anchor bolt 24. Yes.
Specifically, the anchor bolt 24 includes a head portion 2402, a shaft portion 2404 projecting from the head portion 2402, a male screw portion 2408 in which a male screw is formed at the front portion of the shaft portion 2404, and a portion immediately below the head portion 2402. A large diameter portion having an outer diameter larger than the outer diameter of the shaft portion 2404 and less than or equal to the outer diameter of the inner steel pipe 30 is provided at the position of the shaft portion 2404, and this large diameter portion constitutes the contact portion 2406. .

免震装置１０は、上部フランジプレートがアンカーボルトを介して上部構造体に取り付けられ、下部フランジプレート１６がアンカーボルト２４を介して下部構造体１２に取り付けられることで設置されている。詳細には、下部フランジプレート１６が下部構造体１２の取り付けプレート３６の上に載置され、ボルト取り付け用積層ゴム２０のボルト挿通孔２６、取り付けプレート３６のボルト挿通孔３６０２に挿通されたアンカーボルト２４の雄ねじ部２４０８が下部構造体１２に埋め込み固定された袋ナット３８の雌ねじに螺合され、アンカーボルト２４により下部フランジプレート１６が下部構造体１２に締結されることで設置されている。
このように免震装置１０が設置された状態で、内側鋼管３０は、当接部２４０６と取り付けプレート３６とにより挟持され、内側鋼管３０はアンカーボルト２４に対して下部フランジプレート１６が下部構造体１２から離れる方向に対して変位不能に結合されている。言い換えると、アンカーボルト２４は下部構造体１２に螺合され鉛直方向に移動不能であるため、内側鋼管３０は鉛直方向に移動不能に結合されている。
また、外側鋼管３４は、下部フランジプレート１６に対して下方への移動が不能に結合されている。言い換えると、下部フランジプレート１６が上方に変位した際に外側鋼管３４は下部フランジプレート１６と一体に上方に変位するように結合されている。
また、筒状積層ゴム３２はその軸方向にせん断変形可能な状態となっている。言い換えると、筒状積層ゴム３２は、下部フランジプレート１６が上方に変位した際に、外側鋼管３４が下部フランジプレート１６と一体に上方に変位し、上方にせん断変形できる状態となっている。 The seismic isolation device 10 is installed by attaching the upper flange plate to the upper structure via anchor bolts and attaching the lower flange plate 16 to the lower structure 12 via anchor bolts 24. Specifically, the lower flange plate 16 is placed on the attachment plate 36 of the lower structure 12, and the anchor bolt inserted through the bolt insertion hole 26 of the laminated rubber 20 for bolt attachment and the bolt insertion hole 3602 of the attachment plate 36. The male screw portion 2408 of 24 is screwed into the female screw of the cap nut 38 embedded and fixed in the lower structure 12, and the lower flange plate 16 is fastened to the lower structure 12 by the anchor bolt 24.
With the seismic isolation device 10 installed in this manner, the inner steel pipe 30 is sandwiched between the contact portion 2406 and the mounting plate 36, and the inner steel pipe 30 has the lower flange plate 16 as the lower structure with respect to the anchor bolt 24. It is coupled so that it cannot be displaced in the direction away from 12. In other words, since the anchor bolt 24 is screwed into the lower structure 12 and cannot move in the vertical direction, the inner steel pipe 30 is coupled so as not to move in the vertical direction.
Further, the outer steel pipe 34 is coupled to the lower flange plate 16 so as not to move downward. In other words, when the lower flange plate 16 is displaced upward, the outer steel pipe 34 is coupled so as to be displaced upward together with the lower flange plate 16.
Further, the cylindrical laminated rubber 32 is in a state capable of shearing deformation in the axial direction. In other words, the cylindrical laminated rubber 32 is in a state in which when the lower flange plate 16 is displaced upward, the outer steel pipe 34 is displaced upward integrally with the lower flange plate 16 and can be shear-deformed upward.

このような第１の実施の形態によれば、免震用積層ゴム１４に軸方向の引っ張り力が作用したとき、図７に直線Ａで示すように、筒状積層ゴム３２が主に軸方向にせん断変形し、免震装置１０は下部構造体１２から浮き上がり、免震用積層ゴム１４の引張り変形を小さく抑えることができる。
したがって、免震用積層ゴム１４に引抜き力が作用しても、筒状積層ゴム３２のみがせん断変形するので、引抜き未対応の通常の免震装置１０に比べ、免震用積層ゴム１４の性能の劣化は生じにくい。
また、筒状積層ゴム３２は、軸方向が上下方向になるように設置されるので、免震用積層ゴム１４に水平方向にせん断力が作用したとき、筒状積層ゴム３２はほとんど変形せず、免震用積層ゴム１４の位置を保持し、下部構造体１２へせん断力を伝達することができる。 According to such a first embodiment, when an axial tensile force is applied to the seismic isolation laminated rubber 14, the cylindrical laminated rubber 32 is mainly axial as shown by a straight line A in FIG. 7. The seismic isolation device 10 is lifted from the lower structure 12 and the tensile deformation of the seismic isolation laminated rubber 14 can be kept small.
Therefore, even if a pulling force is applied to the seismic isolation laminated rubber 14, only the cylindrical laminated rubber 32 undergoes shear deformation, so that the performance of the seismic isolation laminated rubber 14 is higher than that of a normal seismic isolation device 10 that does not support extraction. Degradation is unlikely to occur.
Further, since the cylindrical laminated rubber 32 is installed so that the axial direction is vertical, the cylindrical laminated rubber 32 is hardly deformed when a shearing force is applied to the seismic isolation laminated rubber 14 in the horizontal direction. The position of the seismic isolation laminated rubber 14 can be maintained, and a shearing force can be transmitted to the lower structure 12.

また、アンカーボルト２４の頭部２４０２は、下部フランジプレート１６（または外側鋼管３４）に当接可能な寸法で形成され、すなわち、筒状積層ゴム３２の上方ヘの変形量の上限を規制する規制手段２２が設けられているので、筒状積層ゴム３２の軸方向せん断変形が大きくなるのを防止できる。
筒状積層ゴム３２の上方ヘの変形量の上限、すなわち、アンカーボルト２４の頭部２４０２の下面と下部フランジプレート１６（または外側鋼管３４）の間の隙間は、地震時の引抜きによる免震用積層ゴム１４の浮上量以上で、かつ筒状積層ゴム３２の特性が変化しない範囲、たとえば、ゴムのせん断変形100%程度に収まるように（例えば、おおよそ20〜30mmの範囲に）設定する。
図７において点Ｂは、下部フランジプレート１６が浮き上がってアンカーボルト２４の頭部２４０２の下面と下部フランジプレート１６（または外側鋼管３４）とが当接した状態を示しており、直線Ｃは、以後、免震用積層ゴム１４が引っ張り変形する状態を示している。また、点線Ｄは、筒状積層ゴム３２を有さない従来の免震装置１０の免震積層用ゴムの変位を示し、想像線Ｅは免震用積層ゴムにボイドなどが発生して損傷する際の引っ張り荷重を示している。 Further, the head 2402 of the anchor bolt 24 is formed with a size that can contact the lower flange plate 16 (or the outer steel pipe 34), that is, a restriction that restricts the upper limit of the amount of deformation of the cylindrical laminated rubber 32 upward. Since the means 22 is provided, an increase in the axial shear deformation of the cylindrical laminated rubber 32 can be prevented.
The upper limit of the amount of deformation upward of the cylindrical laminated rubber 32, that is, the gap between the lower surface of the head 2402 of the anchor bolt 24 and the lower flange plate 16 (or the outer steel pipe 34) is used for seismic isolation by pulling out during an earthquake. It is set so as to be within the range in which the characteristics of the cylindrical laminated rubber 32 do not change, for example, about 100% of the shear deformation of the rubber (for example, in the range of approximately 20 to 30 mm).
In FIG. 7, a point B indicates a state in which the lower flange plate 16 is lifted and the lower surface of the head 2402 of the anchor bolt 24 is in contact with the lower flange plate 16 (or the outer steel pipe 34). FIG. 2 shows a state where the seismic isolation laminated rubber 14 is pulled and deformed. A dotted line D indicates the displacement of the base isolation rubber of the conventional base isolation device 10 that does not have the cylindrical laminated rubber 32, and an imaginary line E causes a void or the like to occur in the base isolation rubber to be damaged. The tensile load at the time is shown.

したがって、第１の実施の形態によれば、何らスペースを確保することなく、しかも簡単に施工でき、ボルト取り付け用積層ゴム２０は破損することもなく、免震用積層ゴム１４に作用する引張り荷重を低減でき、免震用積層ゴム１４の破断、損傷を防止する上で有利となる。 Therefore, according to the first embodiment, the tensile load acting on the seismic isolation laminated rubber 14 can be easily performed without securing any space, and the laminated rubber 20 for bolt mounting is not damaged. This is advantageous in preventing breakage and damage of the seismic isolation laminated rubber 14.

より詳細に説明すると、免震用積層ゴム１４に作用する水平方向せん断力は、下部フランジプレート１６から、筒状積層ゴム３２及びアンカーボルト２４を経由して下部構造体１２に伝達される。アンカーボルト２４は、作用するせん断力と付加曲げに対して設計するが、本装置の場合、免震用積層ゴム１４に引抜き力が作用して免震用積層ゴム１４と下部フランジプレート１６が浮き上がっても、アンカーボルト２４に作用するせん断力の上下位置は変化せず、付加曲げは増大しないので、アンカーボルト２４の設計が容易になり、径の増大を防止できる。 More specifically, the horizontal shearing force acting on the seismic isolation laminated rubber 14 is transmitted from the lower flange plate 16 to the lower structure 12 via the cylindrical laminated rubber 32 and the anchor bolt 24. The anchor bolt 24 is designed with respect to the acting shear force and additional bending, but in the case of this apparatus, the pulling-out force acts on the seismic isolation laminated rubber 14 to lift the seismic isolation laminated rubber 14 and the lower flange plate 16. However, since the vertical position of the shearing force acting on the anchor bolt 24 does not change and the additional bending does not increase, the design of the anchor bolt 24 becomes easy and the increase in diameter can be prevented.

筒状積層ゴム３２は、下部フランジプレート１６にあらかじめねじ込みで簡単に一体化されているので、免震装置１０の設置作業は、通常の免震装置と同様にアンカーボルト２４で締め付けるだけで、追加の作業は無く、作業が簡単である。
本実施の形態の免震装置１０は簡単な構造なので、下部フランジプレート１６及び下部構造体１２の取り付けプレート３６等の寸法の増大を抑えることができる。 Since the cylindrical laminated rubber 32 is simply integrated into the lower flange plate 16 by screwing in advance, the installation work of the seismic isolation device 10 can be added simply by tightening with the anchor bolt 24 as in the case of a normal seismic isolation device. There is no work, and the work is simple.
Since the seismic isolation device 10 of the present embodiment has a simple structure, an increase in the size of the lower flange plate 16 and the attachment plate 36 of the lower structure 12 can be suppressed.

次に、図３を参照して第２の実施の形態について説明する。
なお、以後の実施の形態の説明では、第１の実施の形態と同様な箇所に同一の符号を付してその説明を省略し、異なる点を重点的に説明する。
第２の実施の形態は、当接部２４０６の構成が第１の実施の形態と異なっている。
すなわち、アンカーボルト２４は、頭部２４０２と、頭部２４０２から突設された軸部２４０４と、軸部２４０４の先部に雄ねじが形成された雄ねじ部２４０８と、頭部２４０２の直下の軸部２４０４の箇所に雄ねじが形成された第２の雄ねじ部２４１０とを有している。
そして、当接部２４０６が、第２の雄ねじ部に螺合されたナットＮで構成されている。
このような第２の実施の形態によれば、市販品であるボルト、ナットを用いて当接部２４０６を簡単に構成でき、コスト削減を図る上で有利となる。 Next, a second embodiment will be described with reference to FIG.
In the following description of the embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, the description thereof is omitted, and different points are mainly described.
The second embodiment is different from the first embodiment in the configuration of the contact portion 2406.
That is, the anchor bolt 24 includes a head portion 2402, a shaft portion 2404 projecting from the head portion 2402, a male screw portion 2408 in which a male screw is formed at the front portion of the shaft portion 2404, and a shaft portion immediately below the head portion 2402. A second male screw portion 2410 having a male screw formed at a position 2404;
The abutting portion 2406 is constituted by a nut N screwed to the second male screw portion.
According to the second embodiment as described above, the abutting portion 2406 can be easily configured using commercially available bolts and nuts, which is advantageous for cost reduction.

次に、図４を参照して第３の実施の形態について説明する。
第３の実施の形態は、免震装置１０の設置状態で筒状積層ゴム３２に予め荷重を掛けている点が第１の実施の形態と異なっている。
すなわち、ボルト挿通孔２６の軸方向に沿った内側鋼管３０、筒状積層ゴム３２、外側鋼管３４の長さは、下部フランジプレート１６の厚さよりも小さい同一の寸法で形成されている。
ボルト挿通孔２６に挿通されたアンカーボルト２４を介して下部フランジプレート１６が下部構造体１２に取着され、免震装置１０が設置された状態で、内側鋼管３０の下面は、下部フランジプレート１６の下面と同一面上に位置し、外側鋼管３４の上面は、下部フランジプレート１６の上面と同一面上に位置している。すなわち、免震装置１０が設置された状態で、筒状積層ゴム３２に予めせん断荷重が掛けられ、筒状積層ゴム３２は、内周部よりも外周部が上方に位置するように予めせん断変形し、これにより下部フランジプレート１６が下部構造体１２に押し付けられ、引っ張り力がこの荷重以下の状態では免震装置１０は浮上しない。 Next, a third embodiment will be described with reference to FIG.
The third embodiment is different from the first embodiment in that a load is applied to the cylindrical laminated rubber 32 in the installed state of the seismic isolation device 10 in advance.
That is, the lengths of the inner steel pipe 30, the cylindrical laminated rubber 32, and the outer steel pipe 34 along the axial direction of the bolt insertion hole 26 are formed with the same dimensions that are smaller than the thickness of the lower flange plate 16.
With the lower flange plate 16 attached to the lower structure 12 via the anchor bolts 24 inserted into the bolt insertion holes 26 and the seismic isolation device 10 installed, the lower surface of the inner steel pipe 30 is connected to the lower flange plate 16. The upper surface of the outer steel pipe 34 is positioned on the same plane as the upper surface of the lower flange plate 16. That is, with the seismic isolation device 10 installed, a shear load is applied to the cylindrical laminated rubber 32 in advance, and the cylindrical laminated rubber 32 is preliminarily sheared so that the outer peripheral portion is positioned above the inner peripheral portion. As a result, the lower flange plate 16 is pressed against the lower structure 12, and the seismic isolation device 10 does not float in a state where the tensile force is equal to or less than this load.

第３の実施の形態では、図８に示すように、免震用積層ゴム１４に軸方向の引っ張り力が作用したとき、図８に点Ａで示すように、その引っ張り力が、筒状積層ゴム３２に予め掛けられたせん断荷重になるまでは免震装置１０は下部構造体１２から浮き上がることがない。そして、直線Ｂで示すように、引っ張り力が、筒状積層ゴム３２に予め掛けられたせん断荷重を超えた時点から、筒状積層ゴム３２が当初の状態からさらにせん断変形し、免震装置１０は下部構造体１２から浮き上がり、免震用積層ゴム１４の引張り変形を小さく抑えることができる。
また、図８において点Ｃは、下部フランジプレート１６が浮き上がってアンカーボルト２４の頭部２４０２の下面と下部フランジプレート１６とが当接した状態を示しており、直線Ｆは、以後、免震用積層ゴム１４が引っ張り変形する状態を示し、点線Ｄ、想像線Ｅは図７と同様である。
したがって、第３の実施の形態によれば、第１の実施の形態と同様な効果が奏される他、免震装置１０が浮上する引抜き力を任意に設定できる利点がある。 In the third embodiment, as shown in FIG. 8, when an axial tensile force acts on the seismic isolation laminated rubber 14, as shown by a point A in FIG. The seismic isolation device 10 does not float from the lower structure 12 until the shear load applied to the rubber 32 is reached. Then, as indicated by the straight line B, the cylindrical laminated rubber 32 is further shear-deformed from the initial state from the time when the tensile force exceeds the shear load previously applied to the cylindrical laminated rubber 32, and the seismic isolation device 10. Can be lifted from the lower structure 12 and the tensile deformation of the seismic isolation laminated rubber 14 can be kept small.
Further, in FIG. 8, a point C indicates a state in which the lower flange plate 16 is lifted and the lower surface of the head 2402 of the anchor bolt 24 and the lower flange plate 16 are in contact with each other. A state in which the laminated rubber 14 is pulled and deformed is shown, and a dotted line D and an imaginary line E are the same as those in FIG.
Therefore, according to the third embodiment, the same effects as those of the first embodiment can be obtained, and there is an advantage that the pulling force at which the seismic isolation device 10 floats can be arbitrarily set.

次に、図５を参照して第４の実施の形態について説明する。
第４の実施の形態は、下部フランジプレート１６の上面に、筒状積層ゴム３２がせん断変形した際に内側鋼管３０および筒状積層ゴム３２が収容される収容凹部４０が設けられている点、および、規制手段２２が、アンカーボルト２４の頭部２４０２の下面と外側鋼管３４とで構成されている点が第１の実施の形態と異なっている。
すなわち、アンカーボルト２４の頭部２４０２の下面は、外側鋼管３４の上面に当接可能に形成され、規制手段２２は、アンカーボルト２４の頭部２４０２の下面と外側鋼管３４とで構成されている。
また、アンカーボルト２４の頭部２４０２寄りの軸部２４０４の箇所に、内側鋼管３０の外径以下の寸法の外径を有し内側鋼管３０の上面に当接可能な当接部２４０６が設けられている。
下部フランジプレート１６にボルト挿通孔１６０４が形成されると共に、ボルト挿通孔１６０４の上部に、外側鋼管３４が内側鋼管３０に対して上方に変位した際に内側鋼管３０および筒状積層ゴム３２の収容を可能とした収容凹部４０が設けられている。 Next, a fourth embodiment will be described with reference to FIG.
The fourth embodiment is provided with an accommodation recess 40 in which the inner steel pipe 30 and the cylindrical laminated rubber 32 are accommodated when the cylindrical laminated rubber 32 undergoes shear deformation on the upper surface of the lower flange plate 16. And the point by which the control means 22 is comprised by the lower surface of the head 2402 of the anchor bolt 24, and the outer side steel pipe 34 differs from 1st Embodiment.
That is, the lower surface of the head 2402 of the anchor bolt 24 is formed so as to be able to contact the upper surface of the outer steel pipe 34, and the restricting means 22 is configured by the lower surface of the head 2402 of the anchor bolt 24 and the outer steel pipe 34. .
Further, a contact portion 2406 that has an outer diameter that is equal to or smaller than the outer diameter of the inner steel pipe 30 and that can contact the upper surface of the inner steel pipe 30 is provided at the shaft portion 2404 near the head portion 2402 of the anchor bolt 24. ing.
Bolt insertion holes 1604 are formed in the lower flange plate 16, and the inner steel pipe 30 and the cylindrical laminated rubber 32 are accommodated when the outer steel pipe 34 is displaced upward with respect to the inner steel pipe 30 at the upper part of the bolt insertion hole 1604. An accommodation recess 40 is provided to enable the above.

ボルト挿通孔２６，１６０４，３６０２に挿通されたアンカーボルト２４を介して下部フランジプレート１６が下部構造体１２に締結された状態で、当接部２４０６の下面が内側鋼管３０の上面に当接し、外側鋼管３４の下面が収容凹部４０の周囲の下部フランジプレート１６の上面に当接している。すなわち、外側鋼管３４は下部フランジプレート１６が下部構造体１２から離れる方向に対して一体に変位するように下部フランジプレート１６に結合されている。また、内側鋼管３０はアンカーボルト２４に対して下部フランジプレート１６が下部構造体１２から離れる方向に対して変位不能に結合されている。
このような第４の実施の形態によれば、免震用積層ゴム１４に軸方向の引っ張り力が作用したとき、筒状積層ゴム３２が主に軸方向にせん断変形し、免震装置１０は下部構造体１２から浮き上がり、免震用積層ゴム１４の引張り変形を小さく抑えることができるので、第１の実施の形態と同様な効果が奏される。また、この実施の形態では、外側鋼管３４の外周部および下部フランジプレート１６にねじ加工をする必要がなく、加工、設置が容易であるという利点がある。 With the lower flange plate 16 fastened to the lower structure 12 via the anchor bolts 24 inserted into the bolt insertion holes 26, 1604, 3602, the lower surface of the contact portion 2406 contacts the upper surface of the inner steel pipe 30, The lower surface of the outer steel pipe 34 is in contact with the upper surface of the lower flange plate 16 around the housing recess 40. That is, the outer steel pipe 34 is coupled to the lower flange plate 16 so that the lower flange plate 16 is integrally displaced with respect to the direction away from the lower structure 12. Further, the inner steel pipe 30 is coupled to the anchor bolt 24 so that the lower flange plate 16 cannot be displaced in the direction away from the lower structure 12.
According to the fourth embodiment, when an axial tensile force is applied to the seismic isolation laminated rubber 14, the cylindrical laminated rubber 32 undergoes shear deformation mainly in the axial direction, and the seismic isolation device 10 is Since it floats up from the lower structure 12 and the tensile deformation of the seismic isolation laminated rubber 14 can be suppressed to a small level, the same effects as those of the first embodiment can be obtained. Further, in this embodiment, there is an advantage that the outer peripheral portion of the outer steel pipe 34 and the lower flange plate 16 do not need to be threaded, and the processing and installation are easy.

次に、図６を参照して第５の実施の形態について説明する。
第５の実施の形態は、下部フランジプレート１６の上面に、筒状積層ゴム３２がせん断変形した際に内側鋼管３０および筒状積層ゴム３２が収容される収容凹部４０が設けられている点、および、規制手段２２が、内側鋼管３０と収容凹部４０の底面４００２とで構成されている点が第１の実施の形態と異なっている。
すなわち、アンカーボルト２４の頭部２４０２の下面は、内側鋼管３０の外径以下の寸法の外径を有し内側鋼管３０に当接可能に形成されている。
下部フランジプレート１６にボルト挿通孔１６０４が形成されると共に、ボルト挿通孔１６０４の上部に、外側鋼管３４が内側鋼管３０に対して上方に変位した際に内側鋼管３０および筒状積層ゴム３２の収容を可能とし、かつ、内側鋼管３０の下面に当接可能な底面４００２を有する収容凹部４０が設けられている。
ボルト挿通孔２６，１６０４，３６０２に挿通されたアンカーボルト２４を介して下部フランジプレート１６が下部構造体１２に締結された状態で、アンカーボルト２４の頭部２４０２の下面と内側鋼管３０の上面とが当接すると共に外側鋼管３４の下面が下部フランジプレート１６の上面に当接し、内側鋼管３０および筒状積層ゴム３２が収容凹部４０の上方に位置している。すなわち、外側鋼管３４は下部フランジプレート１６が下部構造体１２から離れる方向に対して一体に変位するように下部フランジプレート１６に結合されている。また、内側鋼管３０はアンカーボルト２４に対して下部フランジプレート１６が下部構造体１２から離れる方向に対して変位不能に結合されている。 Next, a fifth embodiment will be described with reference to FIG.
The fifth embodiment is provided with an accommodation recess 40 in which the inner steel pipe 30 and the cylindrical laminated rubber 32 are accommodated when the cylindrical laminated rubber 32 undergoes shear deformation on the upper surface of the lower flange plate 16. And the point by which the control means 22 is comprised by the inner side steel pipe 30 and the bottom face 4002 of the accommodation recessed part 40 differs from 1st Embodiment.
That is, the lower surface of the head 2402 of the anchor bolt 24 has an outer diameter that is equal to or smaller than the outer diameter of the inner steel pipe 30 and is formed so as to be able to contact the inner steel pipe 30.
Bolt insertion holes 1604 are formed in the lower flange plate 16, and the inner steel pipe 30 and the cylindrical laminated rubber 32 are accommodated when the outer steel pipe 34 is displaced upward with respect to the inner steel pipe 30 at the upper part of the bolt insertion hole 1604. And a housing recess 40 having a bottom surface 4002 capable of contacting the lower surface of the inner steel pipe 30 is provided.
With the lower flange plate 16 fastened to the lower structure 12 via the anchor bolts 24 inserted into the bolt insertion holes 26, 1604, 3602, the lower surface of the head 2402 of the anchor bolt 24 and the upper surface of the inner steel pipe 30 And the lower surface of the outer steel pipe 34 are in contact with the upper surface of the lower flange plate 16, and the inner steel pipe 30 and the cylindrical laminated rubber 32 are positioned above the housing recess 40. That is, the outer steel pipe 34 is coupled to the lower flange plate 16 so that the lower flange plate 16 is integrally displaced with respect to the direction away from the lower structure 12. Further, the inner steel pipe 30 is coupled to the anchor bolt 24 so that the lower flange plate 16 cannot be displaced in the direction away from the lower structure 12.

このような第５の実施の形態によれば、免震用積層ゴム１４に軸方向の引っ張り力が作用したとき、筒状積層ゴム３２が収容凹部４０内でせん断変形し、免震装置１０は下部構造体１２から浮き上がり、免震用積層ゴム１４の引張り変形を小さく抑えることができ、また、内側鋼管３０の下面が収容凹部４０の底面４００２に当接することで、筒状積層ゴム３２の変形量の上限が規制されるので、第１の実施の形態と同様な効果が奏される。また、この実施の形態でも、第４の実施の形態と同様に、外側鋼管３４の外周部および下部フランジプレート１６にねじ加工をする必要がなく、加工、設置が容易であるという利点がある。 According to the fifth embodiment, when the axial tensile force is applied to the seismic isolation laminated rubber 14, the cylindrical laminated rubber 32 undergoes shear deformation in the housing recess 40, and the seismic isolation device 10 is The tensile deformation of the seismic isolation laminated rubber 14 can be suppressed to a small level from the lower structure 12, and the lower surface of the inner steel pipe 30 abuts against the bottom surface 4002 of the housing recess 40, so Since the upper limit of the amount is regulated, the same effect as that of the first embodiment can be obtained. Also in this embodiment, similarly to the fourth embodiment, there is an advantage that the outer peripheral portion of the outer steel pipe 34 and the lower flange plate 16 do not need to be threaded, and the processing and installation are easy.

なお、上記の実施の形態では、本発明を、下部構造体１２と下部フランジプレート１６に適用した場合について説明しているが、本発明は、上部構造体と上部フランジプレートに適用してもよく、また、下部構造体１２と下部フランジプレート１６および上部構造体と上部フランジプレートの双方に適用してもよい。 In the above embodiment, the case where the present invention is applied to the lower structure 12 and the lower flange plate 16 is described. However, the present invention may be applied to the upper structure and the upper flange plate. Further, the present invention may be applied to both the lower structure 12 and the lower flange plate 16, and the upper structure and the upper flange plate.

また、上記の実施の形態では、筒状積層ゴム３２を有するボルト取り付け用積層ゴム２０がアンカーボルト２４や下部フランジプレート１６と別部材である場合について説明したが、筒状積層ゴム３２はアンカーボルト２４や下部フランジプレート１６（または上部フランジプレート）に一体化されていてもよい。
例えば、図５、図６に示す実施の形態では、内側鋼管３０がアンカーボルト２４に一体化されていてもよい。この場合には、図９（Ａ）に示すように、内側鋼管３０が省略され、アンカーボルト２４の軸部２４２０に筒状積層ゴム３２の内周面が接合され、アンカーボルト２４と筒状積層ゴム３２とが一体化されている。また、図９（Ｂ）に示すように、アンカーボルト２４の大径部２４２２に筒状積層ゴム３２の内周面が接合され、アンカーボルト２４と筒状積層ゴム３２とが一体化されている。
また、図１、図３、図４に示す実施の形態では、外側鋼管３２が下部フランジプレート１６（または上部フランジプレート）に一体化されていてもよい。この場合には、図１０（Ａ）、（Ｂ）に示すように、外側鋼管３２が省略され、下部フランジプレート１６（または上部フランジプレート）の孔１６２０の内周面に筒状積層ゴム３２の外周面が接合され、下部フランジプレート１６（または上部フランジプレート）と筒状積層ゴム３２とが一体化されている。 In the above embodiment, the case where the bolt-attached laminated rubber 20 having the cylindrical laminated rubber 32 is a separate member from the anchor bolt 24 and the lower flange plate 16 has been described. 24 or the lower flange plate 16 (or the upper flange plate).
For example, in the embodiment shown in FIGS. 5 and 6, the inner steel pipe 30 may be integrated with the anchor bolt 24. In this case, as shown in FIG. 9A, the inner steel pipe 30 is omitted, the inner peripheral surface of the cylindrical laminated rubber 32 is joined to the shaft portion 2420 of the anchor bolt 24, and the anchor bolt 24 and the cylindrical laminated layer are joined. The rubber 32 is integrated. 9B, the inner peripheral surface of the cylindrical laminated rubber 32 is joined to the large diameter portion 2422 of the anchor bolt 24, and the anchor bolt 24 and the cylindrical laminated rubber 32 are integrated. .
In the embodiment shown in FIGS. 1, 3, and 4, the outer steel pipe 32 may be integrated with the lower flange plate 16 (or the upper flange plate). In this case, as shown in FIGS. 10A and 10B, the outer steel pipe 32 is omitted, and the cylindrical laminated rubber 32 is formed on the inner peripheral surface of the hole 1620 of the lower flange plate 16 (or the upper flange plate). The outer peripheral surface is joined, and the lower flange plate 16 (or the upper flange plate) and the cylindrical laminated rubber 32 are integrated.

また、本実施の形態では、内側鋼管３０、筒状積層ゴム３２、外側鋼管３４が全て円環状で、ボルト取り付け用積層ゴム２０も円環状である場合について説明したが、内側鋼管３０、筒状積層ゴム３２、外側鋼管３４、ボルト取り付け用積層ゴム２０の形状は円環状に限定されない。
例えば、図１〜図４に示す実施の形態では、内側鋼管３０、筒状積層ゴム３２を多角形断面の筒状とし、外側鋼管３４の内周部を多角形断面としてもよい。さらに、ねじ結合以外の手段で外側鋼管３４を下部フランジプレート１６に取り付ける場合、例えば、接着材を用いて外側鋼管３４を下部フランジプレート１６に取り付ける場合には、外側鋼管３４の形状は多角形断面の筒状としてもよく、あるいは、大径部と小径部とを設けそれらの間に段差を設けるなど外側鋼管３４の外周部の形状は種々考えられる。
また、図５〜図６に示す実施の形態では、内側鋼管３０、筒状積層ゴム３２、外側鋼管３４、ボルト取り付け用積層ゴム２０を多角形断面の筒状としてもよい。さらに、外側鋼管３４の外周部は任意の形状にしてもよい。
また、図９に示す実施の形態では、軸部２４２０を多角形断面とし、筒状積層ゴム３２を多角形断面の筒状とし、外側鋼管３４の内周部を多角形断面とし、外側鋼管３４の外周部を任意の形状にしてもよく、図１０に示す実施の形態では、内側鋼管３０、筒状積層ゴム３２を多角形断面の筒状としてもよい。
また、ボルト取り付け用積層ゴム２０の用途は免震装置１０に限定されず、せん断力は伝達するが引っ張り力はできるだけ伝達しないような箇所に広く適用される。 In the present embodiment, the case where the inner steel pipe 30, the cylindrical laminated rubber 32, and the outer steel pipe 34 are all annular and the laminated rubber 20 for bolt mounting is also annular has been described. The shapes of the laminated rubber 32, the outer steel pipe 34, and the bolted laminated rubber 20 are not limited to an annular shape.
For example, in the embodiment shown in FIGS. 1 to 4, the inner steel pipe 30 and the cylindrical laminated rubber 32 may have a polygonal cross section, and the inner peripheral portion of the outer steel pipe 34 may have a polygonal cross section. Further, when the outer steel pipe 34 is attached to the lower flange plate 16 by means other than screw connection, for example, when the outer steel pipe 34 is attached to the lower flange plate 16 using an adhesive, the shape of the outer steel pipe 34 is a polygonal cross section. Various shapes of the outer peripheral portion of the outer steel pipe 34 are conceivable, such as providing a large diameter portion and a small diameter portion and providing a step therebetween.
Moreover, in embodiment shown in FIGS. 5-6, it is good also considering the inner side steel pipe 30, the cylindrical laminated rubber 32, the outer side steel pipe 34, and the laminated rubber 20 for bolt attachment as the cylinder of a polygonal cross section. Furthermore, you may make the outer peripheral part of the outer side steel pipe 34 arbitrary shapes.
In the embodiment shown in FIG. 9, the shaft portion 2420 has a polygonal cross section, the cylindrical laminated rubber 32 has a polygonal cross section, the inner peripheral portion of the outer steel pipe 34 has a polygonal cross section, and the outer steel pipe 34. In the embodiment shown in FIG. 10, the inner steel pipe 30 and the cylindrical laminated rubber 32 may be formed in a cylindrical shape having a polygonal cross section.
Further, the use of the laminated rubber 20 for bolt attachment is not limited to the seismic isolation device 10 and is widely applied to locations where shear force is transmitted but tensile force is not transmitted as much as possible.

１０……免震装置
１２……下部構造体
１４……免震用積層ゴム
１６……下部フランジプレート
２０……ボルト取り付け用積層ゴム
２２……規制手段
２４……アンカーボルト
２４０２……頭部
２４０６……当接部
２６，１６０４，３６０２……ボルト挿通孔
３０……内側鋼管
３２……筒状積層ゴム
３４……外側鋼管
４０……収容凹部 DESCRIPTION OF SYMBOLS 10 ... Seismic isolation device 12 ... Lower structure 14 ... Seismic isolation laminated rubber 16 ... Lower flange plate 20 ... Bolt mounting laminated rubber 22 ... Restriction means 24 ... Anchor bolt 2402 ... Head 2406 ... Abutting portions 26, 1604, 3602 ... Bolt insertion holes 30 ... Inner steel pipe 32 ... Cylindrical laminated rubber 34 ... Outer steel pipe 40 ... Containing recess

Claims

Seismic isolation rubber, upper flange plate provided on the upper part of the base isolation rubber and attached to the upper structure, and lower part of the base isolation rubber via anchor bolts A seismic isolation device comprising a lower flange plate attached to the structure of
An inner steel pipe, a cylindrical laminated rubber constituted by alternately laminating a thin cylindrical rubber sheet and a thin steel pipe on the outer peripheral surface of the inner steel pipe on the outer side in the radial direction of the inner steel pipe, and the cylindrical lamination An outer steel pipe attached to the outer peripheral surface of the rubber, the inner space of the inner steel pipe is provided with a bolt-attached laminated rubber that is a bolt insertion hole through which the shaft portion of the anchor bolt is inserted,
In a state where the flange plate is attached to the structure through the anchor bolt inserted into the bolt insertion hole, the outer steel pipe is integrally displaced with respect to the direction in which the flange plate is separated from the structure. The inner steel pipe is coupled to the anchor bolt so that the flange plate cannot move in the direction away from the structure, and the cylindrical laminated rubber can be shear-deformed in the vertical direction. It is in a state,
Regulating means provided it is to restrict the upper limit of the vertical deformation of the tubular laminated rubber,
In the state where the flange plate is attached to the structure through the anchor bolts inserted through the bolt insertion holes, the cylindrical laminated rubber is opposite to the direction in which the seismic isolation laminated rubber is pulled vertically. A load is applied in the direction of
A seismic isolation device characterized by that.

Seismic isolation rubber, upper flange plate provided on the upper part of the base isolation rubber and attached to the upper structure, and lower part of the base isolation rubber via anchor bolts A seismic isolation device comprising a lower flange plate attached to the structure of
An inner steel pipe, a cylindrical laminated rubber constituted by alternately laminating a thin cylindrical rubber sheet and a thin steel pipe on the outer peripheral surface of the inner steel pipe on the outer side in the radial direction of the inner steel pipe, and the cylindrical lamination An outer steel pipe attached to the outer peripheral surface of the rubber, the inner space of the inner steel pipe is provided with a bolt-attached laminated rubber that is a bolt insertion hole through which the shaft portion of the anchor bolt is inserted,
In a state where the flange plate is attached to the structure through the anchor bolt inserted into the bolt insertion hole, the outer steel pipe is integrally displaced with respect to the direction in which the flange plate is separated from the structure. The inner steel pipe is coupled to the anchor bolt so that the flange plate cannot move in the direction away from the structure, and the cylindrical laminated rubber can be shear-deformed in the vertical direction. It is in a state,
Regulating means provided it is to restrict the upper limit of the vertical deformation of the tubular laminated rubber,
The lower surface of the head of the anchor bolt is formed so as to be able to contact an axial end surface of the outer steel pipe on the side away from the structure,
In the place of the shaft portion near the head of the anchor bolt, an abutting portion that has an outer diameter that is equal to or smaller than the outer diameter of the inner steel pipe is provided that can contact the inner steel pipe,
A bolt insertion hole is formed in the flange plate, and when the flange plate is displaced in the vertical direction in a direction away from the structure together with the outer steel pipe at a position of the bolt insertion hole on the side away from the structure. An accommodation recess that enables accommodation of the inner steel pipe and the cylindrical laminated rubber is provided,
With the flange plate attached to the structure through the anchor bolts inserted into the bolt insertion holes, the contact portion and the inner steel pipe are in contact with each other, and the outer steel pipe on the structure side An axial end surface is in contact with a portion of the lower flange plate around the housing recess, and an axial end surface of the outer steel pipe away from the structure is located away from the lower surface of the head of the anchor bolt. positioned,
A seismic isolation device characterized by that.

Seismic isolation rubber, upper flange plate provided on the upper part of the base isolation rubber and attached to the upper structure, and lower part of the base isolation rubber via anchor bolts A seismic isolation device comprising a lower flange plate attached to the structure of
An inner steel pipe, a cylindrical laminated rubber constituted by alternately laminating a thin cylindrical rubber sheet and a thin steel pipe on the outer peripheral surface of the inner steel pipe on the outer side in the radial direction of the inner steel pipe, and the cylindrical lamination An outer steel pipe attached to the outer peripheral surface of the rubber, the inner space of the inner steel pipe is provided with a bolt-attached laminated rubber that is a bolt insertion hole through which the shaft portion of the anchor bolt is inserted,
In a state where the flange plate is attached to the structure through the anchor bolt inserted into the bolt insertion hole, the outer steel pipe is integrally displaced with respect to the direction in which the flange plate is separated from the structure. The inner steel pipe is coupled to the anchor bolt so that the flange plate cannot move in the direction away from the structure, and the cylindrical laminated rubber can be shear-deformed in the vertical direction. It is in a state,
Regulating means provided it is to restrict the upper limit of the vertical deformation of the tubular laminated rubber,
The bottom surface of the head of the anchor bolt has an outer diameter that is equal to or smaller than the outer diameter of the inner steel pipe, and is formed so as to be able to contact one end face in the axial direction of the inner steel pipe,
A bolt insertion hole is formed in the flange plate, and when the flange plate is displaced in the vertical direction in a direction away from the structure together with the outer steel pipe at a position of the bolt insertion hole on the side away from the structure. An accommodation recess having a bottom surface capable of accommodating the inner steel pipe and the cylindrical laminated rubber and capable of contacting the other end face in the axial direction of the inner steel pipe,
With the flange plate attached to the structure through the anchor bolt inserted through the bolt insertion hole, the lower surface of the head of the anchor bolt and one end surface in the axial direction of the inner steel pipe are in contact with each other. One end surface in the axial direction of the outer steel pipe is in contact with the lower flange plate, and the outer side of the housing recess is in a direction in which the inner steel pipe and the cylindrical laminated rubber are separated from the structure in the vertical direction. Located at
A seismic isolation device characterized by that.

The outer rubber tube is attached to the flange plate in a non-displaceable manner in the vertical direction so that the laminated rubber for bolt mounting is incorporated in the flange plate in advance.
In the place of the shaft portion near the head of the anchor bolt, an abutting portion having an outer diameter of a dimension equal to or smaller than the outer diameter of the inner steel pipe is provided that can come into contact with the end surface in the axial direction of the inner steel pipe,
With the flange plate attached to the structure via the anchor bolt inserted through the bolt insertion hole, the contact portion and the axial end surface of the inner steel pipe are in contact with each other,
The seismic isolation device according to claim 1 .

The anchor bolt includes a head, a shaft projecting from the head, a male screw formed at the front of the shaft and coupled to the structure side, and the shaft just below the head. A second male screw part having a male screw formed at the part,
The abutment portion is configured by a nut screwed into the second male screw portion.
The seismic isolation device according to claim 1, 2 or 4 .

The lower surface of the head of the anchor bolt is formed so as to be able to contact the outer steel pipe in the axial direction of the anchor bolt,
The restricting means is composed of the bottom surface of the head of the anchor bolt and the outer steel pipe.
The seismic isolation device according to claim 2 .