JP2005163391A - Base isolation supporting device - Google Patents
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この発明は、上部構造と下部構造との間に介装され、上部構造の荷重を支持するとともに地震動等の強制振動に対して上部構造の揺れを低減し免震する免震支持装置に関し、更に詳しくは、建造物、機械又は床構造等の上部構造に適用され、該上部構造を支持するとともに地震時における振動を吸収する機能を果たす免震支持装置に関する。 The present invention relates to a seismic isolation support device that is interposed between an upper structure and a lower structure, supports a load of the upper structure, and reduces vibration of the upper structure against forced vibration such as seismic motion, and further Specifically, the present invention relates to a seismic isolation support device that is applied to an upper structure such as a building, a machine, or a floor structure, and that functions to support the upper structure and absorb vibrations during an earthquake.
免震支持装置として、現在一般に、ゴム板と鋼薄板とを交互に積層してなる積層ゴム体を主体とし、適宜該積層ゴム体に鉛プラグの封入される積層ゴム支承が採用されているが、このものは比較的大きな載荷能力を発揮し、弾性復帰作用を有する利点があるものの、上部構造の変位に追従して一体的にせん断変形を受けるので、支持面積が変化し、不安定性を免れない。また、ゴム弾性に依存するので、地震動に対する敏感な応答性が得られない。
一方、すべり或いは転がり機能を有する免震支持装置では、地震動に対する敏感な応答性が得られるが、その移動に伴う敏感性から構造物に不安定性をもたらし、上部構造の転倒モーメントを受け易いという欠点がある。
Currently, as a seismic isolation support device, a laminated rubber bearing in which a rubber sheet and a steel thin plate are alternately laminated as a main component and a lead plug is appropriately sealed in the laminated rubber body is adopted. Although this has the advantage of exhibiting a relatively large loading capacity and having an elastic return action, it undergoes shear deformation integrally following the displacement of the superstructure, so the support area changes and the instability is avoided. Absent. In addition, since it depends on rubber elasticity, a sensitive response to earthquake motion cannot be obtained.
On the other hand, in the seismic isolation support device that has a sliding or rolling function, it is possible to obtain a sensitive response to seismic motion, but the instability of the structure is caused by the sensitivity associated with the movement, and it is easy to receive the overturning moment of the superstructure. There is.
本発明は上記実情に鑑み、すべり或いは転がり機能を有する免震支持装置（以下「すべり免震支持装置」という）の利点に鑑み、このすべり免震支持装置の欠点である構造物に不安定性を克服する新規な構造のすべり免震支持装置を得ることを目的とする。
本発明はこのため、下部構造に連動する基台系に対し上部構造に連動する可動系を一定範囲内で水平移動可能に支持し、可動系に生じる上揚力を基台系に連動して拘束するという新規な着想のもとにこの目的を達成したものである。
In view of the above circumstances, the present invention provides instability to a structure which is a disadvantage of the slip-isolation support device in view of the advantages of the seismic isolation support device having a slip or rolling function (hereinafter referred to as “slip isolation support device”). The object is to obtain a slip-isolated support device with a novel structure to overcome.
For this reason, the present invention supports the movable system interlocking with the upper structure so that it can move horizontally within a certain range with respect to the base system interlocking with the lower structure, and restrains the lifting force generated in the movable system in conjunction with the base system. This goal was achieved based on the new idea of doing.
本発明の免震支持装置は、具体的には次の構成を採る。
基礎又は地盤等の下部構造に連動する基台系と；該基台系に水平移動を許容して設置され、建造物、機械又は床構造等の上部構造に連動する可動台系と；からなる免震支持装置において、
前記基台系は、剛性体の基台と、前記基台に立設固定される複数の柱部材と、前記柱部材の上部において該柱部材間に剛性を保って架け渡される拘束梁とからなり、
前記可動台系は、前記基台の上面に水平方向に移動可能に上部構造の荷重を支持する剛性体の可動台が載置され、該可動台は前記拘束梁の下面に当接する反力受材を有し、
前記基台の上面には内周面が傾斜面をなし底面が平坦面を保持する広がり面を有する鍋状凹部が形成されるとともに、該鍋状凹部に小球状の多数の転動子が密実に一層を保って充填され、
前記可動台の下面は平坦状をなし、該転動子上に移動域を存して載置され、
前記基台系と可動台系との間には復帰機構が介装されてなる、
ことを特徴とする。
Specifically, the seismic isolation support device of the present invention has the following configuration.
A base system linked to a lower structure such as a foundation or the ground; a movable base system installed on the base system to allow horizontal movement and linked to an upper structure such as a building, a machine, or a floor structure; In seismic isolation support devices,
The base system includes a base of a rigid body, a plurality of column members erected and fixed to the base, and a constraining beam bridged with rigidity between the column members at an upper portion of the column member. Become
In the movable platform system, a movable platform of a rigid body that supports the load of the upper structure is mounted on the upper surface of the base so as to be movable in the horizontal direction, and the movable platform receives a reaction force that contacts the lower surface of the restraining beam. Have materials,
The top surface of the base is formed with a pan-shaped recess having an inclined surface with an inner peripheral surface and a bottom surface that holds a flat surface, and a large number of small spherical rolling elements are densely packed in the pan-shaped recess. It is filled with a layer,
The lower surface of the movable base has a flat shape, and is placed on the rolling element with a moving area,
A return mechanism is interposed between the base system and the movable base system,
It is characterized by that.
ここに、「反力受材」は以下の実施形態では可動台箱を採るが、当該態様に限定されない。
上記構成において、
1)鍋状凹部の広がり面は円形であり、可動台はその水平断面形状が円形であり、全方向に移動可能である、
2)鍋状凹部の広がり面は矩形であり、可動台はその水平断面形状が矩形であり、その余裕空間に付き、一方向への移動可能である、
3)反力受材は可動台から張設される突設部材である、
4)前記鍋状凹部の内周面は、一定半径の曲率面に形成されてなる、
ことは、適宜採択される選択的事項である。
更に、上記構成において、
1)上部構造は可動台に直接設置されること、
2)上部構造は可動台に載置板を介して設置されること、
3)載置板は可動台に直接固設されること、
4)載置板は可動台に鉛直方向の緩衝機構を介して配されること、
5)復帰機構のばね材に予圧縮力が導入されてなること、
6)復帰機構は反力受材に設けられた孔内に配されること、
7)復帰機構とは別にロック機構を配すること、
は適宜採用される設計的事項である。
Here, the “reaction force receiving material” adopts a movable base box in the following embodiment, but is not limited to this mode.
In the above configuration,
1) The spreading surface of the pan-shaped recess is circular, and the movable table has a circular horizontal cross-sectional shape and can move in all directions.
2) The spreading surface of the pan-shaped recess is rectangular, and the movable table has a rectangular horizontal cross-sectional shape, is attached to its spare space, and can move in one direction.
3) The reaction force receiving material is a protruding member stretched from the movable base,
4) The inner peripheral surface of the pan-shaped recess is formed with a constant radius of curvature.
This is an optional matter that is adopted as appropriate.
Furthermore, in the above configuration,
1) The superstructure should be installed directly on the movable base,
2) The superstructure is installed on the movable table via a mounting plate,
3) The mounting plate should be fixed directly to the movable base,
4) The mounting plate is arranged on the movable table via a vertical buffer mechanism,
5) Pre-compression force is introduced into the spring material of the return mechanism,
6) The return mechanism is placed in the hole provided in the reaction force receiving material,
7) Provide a lock mechanism separately from the return mechanism,
Is a design matter that is appropriately adopted.
本発明は更に次の構成を採る。
基礎又は地盤等の下部構造に連動する基台系と；該基台系に水平移動を許容して設置され、建造物、機械又は床構造等の上部構造に連動する可動台系と；からなる免震支持装置において、
前記基台系は、少なくとも剛性体の基台を有し、
前記可動台系は、前記基台の上面に水平方向に移動可能に上部構造の荷重を支持する剛性体の可動台が載置され、
前記基台の上面には内周面が傾斜面をなし底面が平坦面を保持する広がり面を有する鍋状凹部が形成されるとともに、該鍋状凹部に小球状の多数の転動子が密実に一層を保って充填され、
前記可動台の下面は平坦状をなし、該転動子上に移動域を存して載置されてなる、
ことを特徴とする。
The present invention further adopts the following configuration.
A base system linked to a lower structure such as a foundation or the ground; a movable base system installed on the base system to allow horizontal movement and linked to an upper structure such as a building, a machine, or a floor structure; In seismic isolation support devices,
The base system has at least a rigid base,
The movable platform system is mounted with a movable platform of a rigid body that supports the load of the upper structure to be movable in the horizontal direction on the upper surface of the base.
The top surface of the base is formed with a pan-shaped recess having an inclined surface with an inner peripheral surface and a bottom surface that holds a flat surface, and a large number of small spherical rolling elements are densely packed in the pan-shaped recess. It is filled with a layer,
The lower surface of the movable base has a flat shape, and is placed on the rolling element with a moving area.
It is characterized by that.
（作用）
(A) 常時
常時において、上部構造の荷重は可動台、転動子及び基台を介して下部構造に伝達され、支持される。本免震支持装置における支持面は可動台の下面が転がり層を構成する多数の小球（転動子）を介して広い支持面を有し、かつ転がり層は剛性体よりなるものであり、大きな載荷能力を有する。
この状態で強風が作用したとき、復帰機構のコイルばねに予圧力を導入するとき、この予圧力の範囲内で風荷重に対抗し、静止状態を保持する。
(B) 地震時
地震時において、地盤が強制振動力を受けると、基礎は一体に振動するが、上部構造は基台と可動台との転がり層を介して転がりが生じ（換言すれば、上部構造と下部構造との間に相対変位が生じる）、上部構造に生起する水平力はコイルばねの付勢力に打ち勝ち、地震動の水平力は低減されて入力される。
入力された水平力により上部構造に揺動力を生じ、上部構造はその固有周期で揺れることになるが、復帰機構のコイルばねにより０点（初期）位置に速やかに復帰させられる。
また、転がりによって生じる上部構造と下部構造との変位差は、許容量に近くなったとき、適宜に配されたストッパーにより移動が規制される。
この移動において、上部構造に連動する可動台の反力受材は拘束梁との当接により可動台系の上揚力は拘束され、上部構造に生じる転倒モーメントを阻止する。
(B-1) 転がり機構の動作・挙動
可動台の下面に接する転がり層の転動子は、小球であるので可動台を多点で支持し、かつ可動台の移動とともに該転動子自体も転動し、極めて小さな動摩擦性を発揮し、可動台の移動は円滑になされる。
可動台が移動するとき、該可動台の下面に接する転がり層を構成する転動子も転がり移動をなし、可動台とともに移動し、その方向の転動子は鍋状凹部の周縁の傾斜面に押し上げられ、盛り上がる。当該押し上げられた転動子は直ちに傾斜によりこぼれ落ち、あるいは両側方向に広がり、転がり層に戻される。
また、反対側においては、空隙部分を生じるが周辺の転動子並びに周縁の傾斜面に積み上げられている転動子により直ちに空隙部分を埋める。あるいは上記した戻されてきた転動子によっても空隙部分は埋められる。
可動台が逆方向に移動するとき、上記した状態とは逆となる。
可動台は揺動運動をなし、これに伴い転がり機構も上述のことを繰り返す。
この動作中、可動台は鍋状金具の平板部のみで移動をなし、上下動作の変位は生じない。
(Function)
(A) Always At all times, the load on the upper structure is transmitted to and supported by the lower structure via the movable table, rolling element and base. The support surface in this seismic isolation support device has a wide support surface through a large number of small balls (rolling elements) whose lower surface of the movable base constitutes the rolling layer, and the rolling layer is made of a rigid body, Has a large loading capacity.
When a strong wind acts in this state, when a preload is introduced into the coil spring of the return mechanism, the wind load is resisted within the range of the preload and the stationary state is maintained.
(B) During an earthquake When the ground receives a forced vibration force during an earthquake, the foundation vibrates together, but the superstructure rolls through the rolling layer between the base and the movable base (in other words, the upper The horizontal force generated in the upper structure overcomes the urging force of the coil spring, and the horizontal force of the ground motion is reduced and input.
The input horizontal force generates a swinging force in the upper structure, and the upper structure swings in its natural period, but is quickly returned to the 0 point (initial) position by the coil spring of the return mechanism.
Further, when the displacement difference between the upper structure and the lower structure caused by rolling approaches an allowable amount, the movement is restricted by an appropriately disposed stopper.
In this movement, the uplift force of the movable platform system is restrained by the contact force of the movable platform interlocking with the upper structure by contact with the restraining beam, and the fall moment generated in the upper structure is prevented.
(B-1) Operation / Behavior of Rolling Mechanism Since the rolling element of the rolling layer in contact with the lower surface of the movable table is a small ball, it supports the movable table at multiple points, and the rolling element itself as the movable table moves. It also rolls, exhibits extremely small dynamic friction, and the movable table moves smoothly.
When the movable table moves, the rolling elements constituting the rolling layer in contact with the lower surface of the movable table also move and move together with the movable table, and the rolling elements in that direction are placed on the inclined surface of the peripheral edge of the pan-shaped recess. Pushed up and excited. The pushed-up rolling element is immediately spilled by inclination or spreads in both directions, and is returned to the rolling layer.
On the opposite side, a gap portion is formed, but the gap portion is immediately filled with the peripheral rolling elements and the rolling elements stacked on the peripheral inclined surface. Alternatively, the gap portion is also filled with the returned rotator.
When the movable base moves in the reverse direction, the above state is reversed.
The movable base makes a swinging motion, and the rolling mechanism repeats the above as well.
During this operation, the movable base moves only by the flat plate portion of the pan-like metal fitting, and the vertical movement is not displaced.
本免震支持装置によれば、地震動に対し基台と可動台とは転がり機構を介して上部構造を下部構造の振動から遮断し、かつ、その転がり層は多点支持面をもって可動台を円滑に移動自在に支持し、可動台の横方向変位は水平状態を保持する。従って、地震動による変位中においても上部構造に何ら悪影響（例えば縦振動）を与えることがない。また、本免震支持装置はすべての部材が剛性体よりなるので、支持面においても高い載荷能力を有し、小型化が図れる。
そして、地震動の変位は、本免震支持装置において所定の移動空間を保持することにより水平面の全方向に対処できる。
留意すべきは、本免震支持装置では、地震動の変位においても、上部構造に連動する可動台系は可動台箱の下面板の上面が拘束梁により拘束され、該可動台系の上揚力が封じられ、上部構造に生じる転倒モーメントを阻止し、免震機能とともに上揚力の阻止機能を共有する極めて有用なものとなっている。
According to the seismic isolation support device, the base and the movable base are shielded from the vibration of the lower structure through the rolling mechanism against the earthquake motion, and the rolling layer smoothly supports the movable base with a multi-point support surface. The horizontal displacement of the movable base maintains a horizontal state. Therefore, no adverse effect (for example, longitudinal vibration) is given to the superstructure even during displacement due to earthquake motion. In addition, since all the members of the seismic isolation support device are made of a rigid body, the support surface has a high loading capacity and can be downsized.
And the displacement of seismic motion can be dealt with in all directions of the horizontal plane by holding a predetermined moving space in the seismic isolation support device.
It should be noted that in this seismic isolation support device, even when the seismic motion is displaced, the upper surface of the lower plate of the movable base box is restrained by the restraining beam in the movable base system that is linked to the superstructure, and the uplift force of the movable base system is It is sealed and prevents the overturning moment generated in the superstructure, and it is extremely useful to share the function of preventing the lifting force with the seismic isolation function.
本免震支持装置によれば、理想に近い低摩擦性が得られ、地盤（下部構造）と上部構造とは振動的に絶縁したものとなっており、極言すれば地震動の加速度入力はゼロとみなされ、上部構造には揺れは殆ど生起されない。 According to this seismic isolation support device, low frictional properties close to ideal are obtained, and the ground (lower structure) and the upper structure are vibrationally insulated. In other words, the acceleration input of seismic motion is zero. It is regarded that almost no shaking occurs in the superstructure.
本発明の免震支持装置の実施の形態を図面に基づいて説明する。
（第１実施形態）
図１〜図８はその一実施形態（第１実施形態）の免震支持装置Ｓを示し、中層階建物への適用例を示す。すなわち、図１〜図３はその全体構成を示し、図４〜図８は各部分構成を示す。
本免震支持装置Ｓは、上部構造Ｇと下部構造Ｂとに介装設置され、上部構造Ｇの荷重を支持し、下部構造Ｂに伝達するとともに地震等の強制振動力より生起される上部構造Ｇの揺れに対して免震作用をなす。
An embodiment of the seismic isolation support device of the present invention will be described with reference to the drawings.
(First embodiment)
FIGS. 1-8 shows the seismic isolation support apparatus S of the one embodiment (1st Embodiment), and shows the example of application to a middle floor building. That is, FIGS. 1 to 3 show the entire configuration, and FIGS. 4 to 8 show the partial configurations.
The seismic isolation support device S is installed in the upper structure G and the lower structure B, supports the load of the upper structure G, transmits the load to the lower structure B, and is generated by a forced vibration force such as an earthquake. Seismic isolation against G shaking.
図１〜図３に示すように、本実施形態の免震支持装置Ｓは、基礎又は地盤の下部構造Ｂに連動する基台系１と、該基台系１に所定の水平移動を許容して拘束される上部構造Ｇに連動する可動台系２と、を含み、該基台系１と可動台系２とに介装される復帰機構３を含む。
しかして、本免震支持装置Ｓは、前記基台系１に前記可動台系２が本発明特有の転がり機構４を介して載置されてなる。
As shown in FIGS. 1 to 3, the seismic isolation support device S of the present embodiment allows the base system 1 interlocked with the foundation or the lower structure B of the ground and the base system 1 to allow predetermined horizontal movement. And a movable base system 2 interlocking with the upper structure G to be restrained, and a return mechanism 3 interposed between the base system 1 and the movable base system 2.
Thus, the seismic isolation support device S includes the movable base system 2 mounted on the base system 1 via the rolling mechanism 4 unique to the present invention.
更に詳細には、基台系１は、上面に所定の凹部が形成された実質的に四角板状の基台６と、該基台６に立設される４本の柱部材７と、該柱部材７の上部において該柱部材７間に剛性を保って架け渡される拘束梁８とからなる。また、可動台系２は、基台１の凹部の底面上に転がり機構４を介して転動移動可能に載置される可動台９と、該可動台９に一体に固設され基台系１に連動する反力受材としての可動台枠１０とからなる。該可動台枠１０は種々の構造態様を採りうるものであり、本実施形態ではその一態様を示す。
なお、基台６は地盤に設置された下部構造Ｂに埋設設置されるが、基台６を地盤中に打ち込まれた基礎杭１２に直接的に固設する態様も採りうる。また、可動台枠１０の上面には載置板１４が固設され、上部構造Ｇに連動される。
More specifically, the base system 1 includes a substantially square plate-like base 6 having a predetermined recess formed on the upper surface, four column members 7 erected on the base 6, The upper portion of the column member 7 includes a constraining beam 8 that spans between the column members 7 while maintaining rigidity. The movable platform 2 includes a movable platform 9 placed on the bottom surface of the concave portion of the platform 1 so as to be able to roll and move via a rolling mechanism 4, and a platform system that is integrally fixed to the movable platform 9. 1 and a movable frame 10 as a reaction force receiving material interlocking with 1. The movable frame 10 can take various structural forms, and this embodiment shows one form thereof.
In addition, although the base 6 is embed | buried and installed in the lower structure B installed in the ground, the aspect which directly fixes the base 6 to the foundation pile 12 driven into the ground can also be taken. A mounting plate 14 is fixed on the upper surface of the movable frame 10 and is linked to the upper structure G.
以下、各部の細部構造に付いて説明する。
基台系１
基台系１は基台６と柱部材７と拘束梁８とからなり、固定系を構成する。
（基台６）
基台６は、上面に上方に開く凹部６ａが形成され、全体としてコンクリート製をもって形成される。凹部６ａには後記するとおり転がり機構４特にはその鍋状金具３５が設置されるが、該凹部６ａをもって鍋状金具３５を兼ねることができる。この場合、その周壁部は傾斜面もしくは曲率面に形成される。
更に、基台９の上面には直円状の開口をもつ蓋枠１５が固設され、その内周面１６は可動台９の水平移動を一定範囲内に規制する。
Hereinafter, the detailed structure of each part will be described.
Base system 1
The base system 1 includes a base 6, a column member 7, and a restraining beam 8 and constitutes a fixed system.
(Base 6)
The base 6 is formed with a concave portion 6a that opens upward on the upper surface, and is made of concrete as a whole. As will be described later, the rolling mechanism 4, particularly its pan-shaped fitting 35, is installed in the concave portion 6 a, and the concave portion 6 a can also serve as the pan-shaped fitting 35. In this case, the peripheral wall portion is formed on an inclined surface or a curved surface.
Further, a lid frame 15 having a right circular opening is fixed on the upper surface of the base 9, and its inner peripheral surface 16 restricts the horizontal movement of the movable base 9 within a certain range.
（柱部材７）
柱部材７は、鋼製の円柱体よりなし、その基部のアンカー部１７を基台６中に埋設して基台６の４か所に立設される。４本の柱部材７は互いに正四角形状の角部に配される。
(Column member 7)
The column member 7 is made of a steel cylinder, and is anchored at four locations on the base 6 with the anchor portion 17 of the base embedded in the base 6. The four column members 7 are arranged at corners of a regular square shape.
（拘束梁８）
拘束梁８は、鋼製の四角断面梁材をなし、柱部材７の上部において該柱部材７間に剛結されるとともに同一水準を保って架け渡される。
拘束梁８の柱部材７への結合は、柱部材７の上部に被嵌される継手（図示せず）を介してもしくは溶接等により直接的に固定される。拘束梁８の下面８ａは平坦面とされる。
(Restraining beam 8)
The constraining beam 8 is a steel square cross-section beam material, and is rigidly connected between the column members 7 at an upper portion of the column member 7 and is bridged while maintaining the same level.
The binding of the constraining beam 8 to the column member 7 is directly fixed through a joint (not shown) fitted on the top of the column member 7 or by welding or the like. The lower surface 8a of the constraining beam 8 is a flat surface.
可動台系２
可動台系２は可動台９と可動台枠１０とからなり、該可動台枠１０に載置板１４が直接的に固設して、もしくは上下動緩衝手段（図８に示す。）を介して設置される。
（可動台９）
可動台９は、鋼製の一定径の円柱状をなす。該可動台９は十分に大きな径をなし大きな載荷力を発揮するとともに、その下面９ａは平滑面をなし、基台６の上面の凹部６ａの転がり機構４に水平を保って転がり移動可能に載置される。
該可動台９の下縁部９ｂは丸みを有するが、必須ではない。
Movable stand system 2
The movable platform 2 includes a movable platform 9 and a movable platform 10, and a mounting plate 14 is fixed directly to the movable platform 10 or through a vertical motion buffering means (shown in FIG. 8). Installed.
(Moving base 9)
The movable table 9 has a columnar shape made of steel and having a constant diameter. The movable base 9 has a sufficiently large diameter and exerts a large loading force, and its lower surface 9a has a smooth surface, and is mounted so as to be able to roll while maintaining the horizontal in the rolling mechanism 4 of the recess 6a on the upper surface of the base 6. Placed.
The lower edge portion 9b of the movable base 9 is rounded but not essential.
（可動台枠９）
可動台枠９は、鋼製の下面板２０、上面板２１、側面板２２より剛性の四角箱状体をなし、可動台９に一体に固設される。
下面板２０は、四角形（本実施形態では正方形）で、所定の厚さの平板体をなし、中央に大径の円孔２４が開設され、可動台９と中心を一致して定位置状態を採る。かつ、所定位置に４つの円形状の孔すなわち拘束孔２５が開設される。該下面板２０の各拘束孔２５の中心は定位置状態で柱部材７の中心と一致する。また、該下面板２０の上面２０ａは平坦面とされ、拘束梁８の下面８ａに当接する。
上面板２１は、下面板２０と同一外形の四角形状をなし、所定の厚さを有する。該上面板２１は可動台９の上面に載置され、取付けボルト２７をもって強固に固定される。
側面板２２は、所定の厚さと高さを有し、下面板２０と上面板２１との周縁間に配され、それら板状体２０，２１を取付けボルト２８をもって所定の間隔をもって一体化をなす。その空間は拘束梁８の高さを保持すれば足りるが、若干の余裕高さを有する。
可動台枠１０が可動台９に定位置に固定されたとき、可動台枠１０の下面すなわち下面板２０の下面は基台６（もしくは蓋枠１５）との上面と若干の空隙を保持する。
(Movable underframe 9)
The movable frame 9 is a rigid square box-shaped body made of a steel lower plate 20, upper plate 21, and side plate 22, and is integrally fixed to the movable table 9.
The lower surface plate 20 is a quadrangle (square in the present embodiment), is a flat plate having a predetermined thickness, has a large-diameter circular hole 24 in the center, and is aligned with the movable base 9 in a fixed position state. take. In addition, four circular holes, that is, restraint holes 25 are opened at predetermined positions. The center of each restraining hole 25 of the lower surface plate 20 coincides with the center of the column member 7 in a fixed position. Further, the upper surface 20 a of the lower surface plate 20 is a flat surface and abuts against the lower surface 8 a of the restraining beam 8.
The upper surface plate 21 has a rectangular shape with the same outer shape as the lower surface plate 20, and has a predetermined thickness. The upper surface plate 21 is placed on the upper surface of the movable base 9 and is firmly fixed with mounting bolts 27.
The side plate 22 has a predetermined thickness and height, and is arranged between the peripheral edges of the lower surface plate 20 and the upper surface plate 21, and the plate-like bodies 20, 21 are integrated with mounting bolts 28 at a predetermined interval. . It is sufficient for the space to maintain the height of the constraining beam 8, but it has a slight margin.
When the movable frame 10 is fixed to the movable table 9 at a fixed position, the lower surface of the movable frame 10, that is, the lower surface of the lower surface plate 20, holds a slight gap from the upper surface of the base 6 (or the lid frame 15).
復帰機構３
復帰機構３は固定台系１の柱部材７と可動台系２の拘束孔２５との間に介装される。
復帰機構３は、複数のコイルばね３０が柱部材７の上部と拘束孔２５の中間位置とにおいて、両端を固定して、所定間隔を保って放射状（本実施形態では４５°間隔）に配される。このコイルばね３０のばね係数は適宜に調整され、可動台９の許容移動量を特には制約しない。
コイルばね３０は、1)予圧縮力が導入される態様、2)応力が０の態様の２態様を採る。
1)の圧縮力が導入される態様においては、可動台系２はコイルばね３０を介して柱部材７から反力を受け、圧縮力に見合う大きさの外力が作用するまでは可動台系２は静止状態を保つ。2)の応力が０の態様においては、別途配されるロック機構と共働して所定の外力までは静止状態を保つが、地震力が検知されたときにはロック機構が解除され、当該コイルばね３０に圧縮力と引張り力が交互に導入される。
当該復帰機構４のコイルばね３０は復帰機能のみならず、減衰機能を有するが、特に大きな減衰力を必要とするときには、該コイルばね３０に更に大きな圧縮力が導入される。
Return mechanism 3
The return mechanism 3 is interposed between the column member 7 of the fixed base system 1 and the restraining hole 25 of the movable base system 2.
In the return mechanism 3, a plurality of coil springs 30 are arranged radially (at 45 ° intervals in this embodiment) with a fixed interval between the upper ends of the column members 7 and the intermediate positions of the restraining holes 25. The The spring coefficient of the coil spring 30 is adjusted as appropriate, and the allowable movement amount of the movable base 9 is not particularly limited.
The coil spring 30 takes two modes: 1) a mode in which a precompression force is introduced, and 2) a mode in which the stress is zero.
In the aspect in which the compressive force of 1) is introduced, the movable base system 2 receives a reaction force from the column member 7 via the coil spring 30, and the movable base system 2 is applied until an external force having a magnitude corresponding to the compressive force is applied. Keeps stationary. When the stress of 2) is 0, the lock mechanism is operated in cooperation with a separately arranged lock mechanism and remains stationary until a predetermined external force, but when the seismic force is detected, the lock mechanism is released and the coil spring 30 is released. Compressive force and tensile force are introduced alternately.
The coil spring 30 of the return mechanism 4 has not only a return function but also a damping function. When a particularly large damping force is required, a larger compressive force is introduced into the coil spring 30.
転がり機構４
転がり機構４は、本発明に特有の構成を採り、基台６の上面の凹部６ａと可動台９の下面９ａとの間に介装設置される。
詳しくは、該転がり機構４は、基台６の凹部６ａ内に装入設置される鋼製の鍋状金具３２と、該鍋状金具３２に密実に敷設される多数の小球状の転動子３３とを主体とし、更には、可動台９の下面９ａ及びその下縁部９ｂ、基台６のストッパー１６を含む。上記した多数の転動子３３は鍋状金具３２内に一層に敷き並べられ「転がり層」を形成する。
以下、 更に本転がり機構４の構成要素に付き詳述する。
鍋状金具３２は、平底部３２Ａと周縁部３２Ｂとから浅底の円筒鍋状をなし、所定厚さの鋼板をもって形成され、 周縁部３２Ｂを残してその余の平底部３２Ａは平坦な円板面をなす。平底部３２Ａの径Φ１は、 上方の可動台９の下面９ａの径Φ２よりも十分に大きくされ、可動台９の全方向への移動を確保する。該鍋状金具３２の周縁部３２Ｂは、本実施形態では一定半径の曲面に形成されるが、その余の形状（例えば、傾斜面）を除外するものではない。
転動子３３は、剛性（鋼製）の小球体よりなり、いわゆるボールベアリングが使用され、鍋状金具３２の底面に密実に層状に敷き並べられ、転がり層を形成する。該転がり層は少なくとも鍋状金具３２の平底部３２Ａの全体に及び、 更には本実施形態では鍋状金具３２の周縁部３２Ｂにも及んでいる。 しかして、該転動子３３は極めて小さな動摩擦係数（具体値としては０．０１５）を示す。
可動台９はその下面９ａを転動子３３上に載置され、転がり層上を低摩擦で移動する。該可動台９の下縁部９ｂは丸みを持たせ、 転動子３３上の移動の際にはひっかかりとはならない。
鍋状金物３２の平底部３２Ａの径Φ１と可動台９の下面９ａの径Φ２との差（Φ１−Φ２）だけ可動台９は水平に自由に動くことになるが、 それ以上の移動は可動台９の本体の側面が基台６のストッパー面１６に当接して阻止される。
Rolling mechanism 4
The rolling mechanism 4 has a configuration unique to the present invention, and is interposed between the recess 6 a on the upper surface of the base 6 and the lower surface 9 a of the movable base 9.
Specifically, the rolling mechanism 4 includes a steel pan-shaped metal fitting 32 that is inserted and installed in the recess 6 a of the base 6, and a large number of small spherical rolling elements that are densely laid on the pan-shaped metal fitting 32. 33, and further includes a lower surface 9a and a lower edge portion 9b of the movable base 9, and a stopper 16 of the base 6. A large number of the above-described rolling elements 33 are laid out in a single layer in the pan-shaped metal fitting 32 to form a “rolling layer”.
Hereinafter, the components of the rolling mechanism 4 will be described in detail.
The pan-shaped metal fitting 32 is formed in a shallow cylindrical pan shape from a flat bottom portion 32A and a peripheral edge portion 32B, and is formed of a steel plate having a predetermined thickness. The remaining flat bottom portion 32A is a flat disk leaving the peripheral edge portion 32B. Make a face. The diameter Φ1 of the flat bottom portion 32A is sufficiently larger than the diameter Φ2 of the lower surface 9a of the upper movable table 9, and ensures movement of the movable table 9 in all directions. The peripheral edge 32B of the pan-shaped metal fitting 32 is formed in a curved surface having a constant radius in this embodiment, but does not exclude the remaining shape (for example, an inclined surface).
The rolling elements 33 are made of rigid (steel) small spheres, and so-called ball bearings are used. The rolling elements 33 are densely arranged in layers on the bottom surface of the pan-shaped fitting 32 to form a rolling layer. The rolling layer extends to at least the entire flat bottom portion 32A of the pot-shaped metal fitting 32, and further extends to the peripheral edge portion 32B of the pot-shaped metal fitting 32 in this embodiment. Accordingly, the rolling element 33 exhibits a very small dynamic friction coefficient (specific value is 0.015).
The movable table 9 has its lower surface 9a placed on the rolling element 33, and moves on the rolling layer with low friction. The lower edge portion 9 b of the movable base 9 is rounded so that it does not get caught when moving on the rolling element 33.
The movable base 9 can move freely horizontally by the difference (Φ1-Φ2) between the diameter Φ1 of the flat bottom 32A of the pot-shaped hardware 32 and the diameter Φ2 of the lower surface 9a of the movable base 9, but further movement is movable. The side surface of the main body of the base 9 abuts against the stopper surface 16 of the base 6 and is prevented.
載置板１４・上部構造Ｇ
載置板１４は、四角形状の所定厚さの鋼板よりなり、可動台枠１０の上面に載置され、取付けボルト２７をもって一体に固設される。該載置板１４を介して上部構造Ｇが構築されるが、場合によっては載置板１４を省略し、上部構造Ｇを可動台９もしくは可動台枠１０上に構築することは可能である。該載置板１４にアンカー材３５が植設され、該アンカー材３５を介して鉄筋コンクリート柱３６が構築される。
該載置板１４上に鉄骨柱が構築される場合には、載置板１４にボルトが植設され、ナットをもって鉄骨柱を固設する態様を採ることは自由である。
Mounting plate 14 / superstructure G
The mounting plate 14 is made of a rectangular steel plate having a predetermined thickness, is mounted on the upper surface of the movable frame 10, and is integrally fixed with mounting bolts 27. Although the upper structure G is constructed via the mounting plate 14, it is possible to omit the mounting plate 14 in some cases and construct the upper structure G on the movable table 9 or the movable frame 10. Anchor material 35 is planted on the mounting plate 14, and a reinforced concrete column 36 is constructed through the anchor material 35.
When a steel column is constructed on the mounting plate 14, it is free to adopt a mode in which bolts are planted on the mounting plate 14 and the steel column is fixed with a nut.
諸元
本実施形態の免震支持装置Ｓの諸元の一例を示す。
鍋状金物３２は、差し渡し径が９００ｍｍ、深さが１００ｍｍ、平底部の径が７００ｍｍ、周縁部の曲率半径が１００ｍｍを採る。
転動子３３は、径が１０ｍｍの鋼球であり、６３００個使用される。
柱部材７は、径が５０ｍｍを採る。
可動台９は、本体の径が４００ｍｍを採る。
可動台枠１０は、一辺が１ｍ５００ｍｍを採り、その拘束孔２５の径は４００ｍｍを採る。
しかして、免震支持装置Ｓは±１００ｍｍの可動域を保持する。
Shows an example of specifications of the seismic isolation support device S of specifications embodiment.
The pot-shaped hardware 32 has a passing diameter of 900 mm, a depth of 100 mm, a flat bottom diameter of 700 mm, and a peripheral radius of curvature of 100 mm.
The rolling elements 33 are steel balls having a diameter of 10 mm, and 6300 pieces are used.
The column member 7 has a diameter of 50 mm.
The movable base 9 has a main body diameter of 400 mm.
The movable frame 10 has a side of 1 m500 mm, and the restraint hole 25 has a diameter of 400 mm.
Therefore, the seismic isolation support device S maintains a movable range of ± 100 mm.
（本免震支持装置Ｓの組立て）
上記構成よりなる本免震支持装置Ｓの製作は次の手順による。
(1) 基台６を設置するとともに柱部材７を立設する。
(2) 基台６の凹部６ａに鍋状金具３２を設置し、該鍋状金具３３内に転動子３３を全面に敷設する。
(3) 蓋枠１５を設置固定する。
(4) 可動台９を転がり層上に配する。
(5) 可動台枠１０の下面板２０を、該下面板２０の円孔２５を可動台９に嵌装させ、また拘束孔２４を柱部材７に嵌装させて設置する。円孔２４と柱部材７とにわたって復帰機構３（コイルばね）を設置する。
(6) 柱部材７間に拘束梁８を設置する。
(7) 下面板２０に側面板２２、上面板２１を取り付け、可動台枠１０を取付けボルト２８をもって組み立てる。
(8) 載置板１４を可動台枠１０上に配し、取付けボルト２７をもって可動台９へ一体に取り付ける。
(Assembly of the seismic isolation support device S)
The seismic isolation support device S having the above-described configuration is manufactured according to the following procedure.
(1) Install the base 6 and erect the column member 7.
(2) The pot-shaped metal fitting 32 is installed in the recess 6 a of the base 6, and the rotator 33 is laid on the entire surface in the pot-shaped metal fitting 33.
(3) Install and fix the lid frame 15.
(4) The movable table 9 is arranged on the rolling layer.
(5) The lower surface plate 20 of the movable frame 10 is installed by fitting the circular hole 25 of the lower surface plate 20 to the movable table 9 and fitting the restraint hole 24 to the column member 7. The return mechanism 3 (coil spring) is installed over the circular hole 24 and the column member 7.
(6) A restraint beam 8 is installed between the column members 7.
(7) The side plate 22 and the top plate 21 are attached to the bottom plate 20, and the movable frame 10 is assembled with the mounting bolts 28.
(8) The mounting plate 14 is placed on the movable frame 10 and attached to the movable table 9 with the mounting bolts 27 integrally.
叙上の免震支持装置Ｓでは、その基台６、可動台９、可動台枠１０に付き、所定太さの一体性部材で形成する例を示したが、それらを所定厚さの板状体の積層をもって形成することがなされる。
図６に免震支持装置Ｓの積層構造態様を示す。
すなわち、基台６Ａは複数の鋼板を積み重ね、縦ボルト・ビスをもって一体化し、上部に凹部６ａを形成する。凹部６ａ内には鍋状金具３２、転動子３３が配される。蓋枠１５Ａは一枚の鋼板よりなる。
可動台９Ａは多数の鋼板を積み重ね、縦ボルト・ビスをもって一体化してなる。
図示しないが、可動台枠１０も鋼板の積層構造によることができる。
In the above-described seismic isolation support device S, an example in which the base 6, the movable base 9, and the movable base frame 10 are formed of an integral member having a predetermined thickness is shown. It is formed with a stack of bodies.
FIG. 6 shows a laminated structure aspect of the seismic isolation support device S.
That is, the base 6A stacks a plurality of steel plates and integrates them with vertical bolts and screws to form a recess 6a in the upper part. A pot-shaped metal fitting 32 and a rolling element 33 are arranged in the recess 6a. The lid frame 15A is made of a single steel plate.
The movable base 9A is formed by stacking a large number of steel plates and integrating them with vertical bolts and screws.
Although not shown, the movable underframe 10 can also have a laminated structure of steel plates.
（本免震支持装置Ｓの取付け・配置）
本免震支持装置Ｓは、中層規模の鉄筋コンクリートもしくは鉄骨造の建造物Ｇに対して次のように配され、取り付けられる。
図７にその取付け・配置を示す。
地盤Ｅに対して適宜の基礎杭Ｐが打設され、該基礎杭Ｐの頭部をコンクリート基礎Ｂをもって剛結する。このコンクリート基礎Ｂ上に本免震支持装置Ｓの基台６がアンカーボルト等の適宜の固定手段を介して水準を保って設置される。
しかる後、上述した手順で本免震支持装置Ｓを組み立てる。
免震支持装置Ｓは、基礎Ｂに対称を保って均等に配される。４箇所を最少とするが、中層規模の建造物においては、それ以上の多数の免震支持装置Ｓが配される。本免震支持装置Ｓにあっては１基当たりの支持能力が高いので、比較的少なくてもよい。図７には示されていないが、場合によっては減衰装置がこれらの免震支持装置Ｓに併置して、又は独立して配されることもある。
建造物Ｇはこの免震支持装置Ｓ上に、載置台１４に固設したアンカー材３５を介して構築される。建造物Ｇの骨組構造が鋼材であるとき、アンカーボルトにナットを螺合して、直接的に載置台１４に固定される。
(Installation and arrangement of the seismic isolation support device S)
The seismic isolation support device S is arranged and attached to a medium-scale reinforced concrete or steel structure G as follows.
FIG. 7 shows the installation and arrangement.
An appropriate foundation pile P is driven on the ground E, and the head of the foundation pile P is rigidly connected with the concrete foundation B. On this concrete foundation B, the base 6 of the seismic isolation support device S is installed while maintaining a level through appropriate fixing means such as anchor bolts.
Thereafter, the seismic isolation support device S is assembled according to the procedure described above.
The seismic isolation support devices S are evenly arranged on the foundation B while maintaining symmetry. Although the number of the four places is minimized, in a middle-scale building, a larger number of seismic isolation support devices S are arranged. In this seismic isolation support device S, since the support capability per unit is high, it may be relatively small. Although not shown in FIG. 7, in some cases, a damping device may be arranged in parallel with these seismic isolation support devices S or independently.
The building G is constructed on the seismic isolation support device S via an anchor member 35 fixed to the mounting table 14. When the frame structure of the building G is a steel material, a nut is screwed onto the anchor bolt, and the structure is fixed directly to the mounting table 14.
（本免震支持装置Ｓの作用）
本免震支持装置Ｓは建造物すなわち上部構造Ｇとコンクリート基礎すなわち下部構造Ｂとの間に介装され、上部構造Ｇの荷重を支持し、下部構造Ｂひいては地盤Ｅに該荷重を伝達するとともに、地震動に対する免震作用を発揮する。
(A) 常時
常時において、上部構造Ｇの荷重は、載置台１４、可動台９、転がり層及び基台６を介して下部構造Ｂに伝達され、支持される。本免震支持装置Ｓにおける支持面は可動台９の下面９ａが転がり層の多数の小球（転動子）３６を介して広い支持面を有し、かつ転がり層は剛性体よりなるものであり、大きな載荷能力を有する。
この状態で強風が作用したとき、復帰機構３のコイルばね３０に予圧力を導入するとき、この予圧力の範囲内で風荷重に対抗し、静止状態を保持する。また、別途ロック機構を有するときは、可動台９は不動状態を保ち、風荷重に対抗する。
(Operation of the seismic isolation support device S)
The seismic isolation support device S is interposed between a building, that is, an upper structure G, and a concrete foundation, that is, a lower structure B, supports the load of the upper structure G, and transmits the load to the lower structure B and then to the ground E. Demonstrates seismic isolation against earthquake motion.
(A) Always At all times, the load of the upper structure G is transmitted to and supported by the lower structure B via the mounting table 14, the movable table 9, the rolling layer and the base 6. The support surface of the seismic isolation support device S is such that the lower surface 9a of the movable base 9 has a wide support surface through a large number of small spheres (rollers) 36 of the rolling layer, and the rolling layer is made of a rigid body. There is a large loading capacity.
When a strong wind acts in this state, when a preload is introduced to the coil spring 30 of the return mechanism 3, the wind load is resisted within the range of the preload and the stationary state is maintained. In addition, when a separate locking mechanism is provided, the movable base 9 remains stationary and resists wind loads.
(B) 地震時
地震時において、地盤Ｅが強制振動力を受けると、基礎Ｂは一体に振動するが、上部構造Ｇは基台６と可動台９との転がり層を介して転がりが生じ（換言すれば、上部構造Ｇと下部構造Ｂとの間に相対変位が生じる）、上部構造Ｇに生起する水平力はコイルばね３０の付勢力に打ち勝ち、地震動の水平力は低減されて入力される。
入力された水平力により上部構造Ｇに揺動力Ｆを生じ、上部構造Ｇはその固有周期で揺れることになるが、復帰機構３のコイルばね３０により０点（初期）位置に速やかに復帰させられる。このとき、コイルばね３０は放射状に均等に配されているので、圧縮力と引張り力とが均等に作用し、いずれのコイルばね３０も初期位置に戻る作用を発揮する。
また、転がりによって生じる上部構造Ｇと下部構造Ｂとの変位差は、許容量に近くなったとき可動台９はストッパー１６により当接し、移動が規制される。
この移動において、上部構造Ｇに連動する可動台枠１０の下面板２０は拘束梁８との当接により可動台系２の上揚力は拘束され、上部構造Ｇに生じる転倒モーメントを阻止する。
(B) During an earthquake When the ground E receives a forced vibration force during an earthquake, the foundation B vibrates integrally, but the superstructure G rolls through the rolling layer of the base 6 and the movable base 9 ( In other words, relative displacement occurs between the upper structure G and the lower structure B), and the horizontal force generated in the upper structure G overcomes the urging force of the coil spring 30, and the horizontal force of the earthquake motion is reduced and input. .
The input horizontal force generates a swinging force F in the upper structure G, and the upper structure G swings in its natural period, but is quickly returned to the 0 point (initial) position by the coil spring 30 of the return mechanism 3. . At this time, since the coil springs 30 are evenly distributed radially, the compressive force and the tensile force act equally, and any of the coil springs 30 returns to the initial position.
Further, when the displacement difference between the upper structure G and the lower structure B caused by rolling approaches an allowable amount, the movable base 9 comes into contact with the stopper 16 and the movement is restricted.
In this movement, the lower plate 20 of the movable frame 10 interlocked with the upper structure G is restrained from the uplifting force generated in the upper structure G by restraining the lifting force of the movable platform 2 by contacting the restraining beam 8.
(B-1) 転がり機構４の動作・挙動
可動台９の下面９ａに接する転がり層の転動子３３は、小球であるので可動台９を多点で支持し、かつ可動台９の移動とともに該転動子３３自体も転動し、極めて小さな動摩擦性を発揮し、可動台９の移動は円滑になされる。
可動台９が移動するとき（Ａ方向、図５参照）、該可動台９の下面９ａに接する転がり層を構成する転動子３３も転がり移動をなし、可動台９とともに移動し、その方向の転動子３３は鍋状金具３２の周縁部３２Ｂに押し上げられ、盛り上がる。当該押し上げられた転動子３３は直ちに周縁部３２Ｂの曲面によりこぼれ落ち、あるいは両側方向に広がり、転がり層に戻される。
また、可動台９の反対側（Ｂ方向、図５参照）においては、転がり層には空隙部分を生じるが周辺の転動子３３並びに周縁部３３Ｂに積み上げられている転動子３３により直ちに空隙部分を埋める。あるいは上記したＡ方向から戻されてきた転動子３３によっても空隙部分は埋められる。
可動台９が逆方向（Ｂ方向）に移動するとき、上記した状態とは逆となる。すなわち、Ｂ方向側の転動子３３は盛り上がり、反対方向（Ａ方向）側は生じた空隙部分に周辺の転動子３３は直ちにこれを埋める。
可動台９は揺動運動をなし、これに伴い転がり機構４も上述のことを繰り返す。
この動作中、可動台９は鍋状金具３２の平底部３２Ａのみで移動をなし、上下動作の変位は生じない。
(B-1) Operation / behavior of the rolling mechanism 4 Since the rolling element 33 of the rolling layer in contact with the lower surface 9a of the movable table 9 is a small sphere, the movable table 9 is supported at multiple points and the movable table 9 is moved. At the same time, the rolling element 33 itself rolls to exhibit extremely small dynamic friction, and the movable table 9 can be moved smoothly.
When the movable base 9 moves (direction A, see FIG. 5), the rolling elements 33 constituting the rolling layer in contact with the lower surface 9a of the movable base 9 also move and move together with the movable base 9 in the direction. The rotator 33 is pushed up by the peripheral edge 32B of the pan-shaped metal fitting 32 and rises. The pushed-up rolling element 33 is immediately spilled by the curved surface of the peripheral edge portion 32B, or spreads in both directions, and returned to the rolling layer.
On the other side of the movable base 9 (direction B, see FIG. 5), a gap is formed in the rolling layer, but the gap is immediately generated by the peripheral rolling element 33 and the rolling element 33 stacked on the peripheral edge 33B. Fill the part. Alternatively, the gap portion is also filled with the rotator 33 returned from the A direction.
When the movable table 9 moves in the reverse direction (B direction), the above state is reversed. That is, the rolling element 33 on the B direction side rises, and the peripheral rolling element 33 immediately fills the gap portion formed on the opposite direction (A direction) side.
The movable base 9 performs a swinging motion, and the rolling mechanism 4 repeats the above in accordance with this.
During this operation, the movable base 9 is moved only by the flat bottom portion 32A of the pan-shaped fitting 32, and the vertical movement is not displaced.
（本免震支持装置Ｓの効果）
本免震支持装置Ｓによれば、地震動に対し基台６と可動台９とは転がり機構４を介して上部構造Ｇを下部構造Ｂの振動から遮断し、かつ、その転がり層は多点支持面をもって可動台９を円滑に移動自在に支持し、該可動台９の変位は鍋状金具３２の平底部３２Ａのみでなされるので可動台９の横方向変位は水平状態を保持する。従って、地震動による変位中においても上部構造Ｇに何ら悪影響（例えば縦振動）を与えることがない。また、本免震支持装置Ｓはすべての部材が剛性体よりなるので、支持面においても高い載荷能力を有し、小型化が図れる。
そして、地震動の変位は、本免震支持装置Ｓにおいて所定の移動空間を保持することにより水平面の全方向に対処できる。
特に留意すべきは、本免震支持装置Ｓでは、地震動の変位においても、上部構造Ｇに連動する可動台系２は可動台枠１０の下面板２０の上面が拘束梁８により拘束され、該可動台系２の上揚力が封じられ、上部構造Ｇに生じる転倒モーメントを阻止し、免震機能とともに上揚力の阻止機能を共有する極めて有用なものとなっている。
(Effect of the seismic isolation support device S)
According to the seismic isolation support device S, the base 6 and the movable base 9 block the upper structure G from the vibration of the lower structure B through the rolling mechanism 4 against the earthquake motion, and the rolling layer is supported at multiple points. The movable table 9 is supported by the surface so as to be smoothly movable, and the displacement of the movable table 9 is made only by the flat bottom portion 32A of the pan-shaped metal fitting 32, so that the lateral displacement of the movable table 9 maintains the horizontal state. Therefore, no adverse effect (for example, longitudinal vibration) is given to the superstructure G even during displacement due to earthquake motion. In addition, since all the members of the seismic isolation support device S are made of a rigid body, the support surface has a high loading capacity and can be downsized.
The seismic motion displacement can be dealt with in all directions on the horizontal plane by holding a predetermined movement space in the seismic isolation support device S.
It should be particularly noted that in the seismic isolation support device S, the upper surface of the lower surface plate 20 of the movable frame 10 is constrained by the constraining beam 8 in the movable platform system 2 interlocked with the upper structure G even in the displacement of the earthquake motion. The upper lifting force of the movable platform 2 is sealed, preventing the overturning moment generated in the upper structure G, and sharing the upper lifting force blocking function together with the seismic isolation function.
（他の態様）
図８に載置板の他の態様を示す。
本態様では縦振動による吸振機能を有する。
この吸振機能付き載置板１４Ａは、上部部材４０と下部部材４１とこれらの部材４０，４１間に介装される吸振機構（脚部材４２、コイルばね４３）とからなる。
本態様によれば、下部構造Ｂから伝達される縦振動はコイルばね４３により吸収され、上部部材４０を介して上部構造Ｇへの伝達を阻止することとなる。
しかして、免震床、嫌振動性の精密機械台にこの構造は好適なものとして適用される。更には小規模建造物への適用もなされる。
(Other aspects)
FIG. 8 shows another aspect of the mounting plate.
In this aspect, it has a vibration absorbing function by longitudinal vibration.
The mounting plate 14A with a vibration absorbing function includes an upper member 40, a lower member 41, and a vibration absorbing mechanism (a leg member 42 and a coil spring 43) interposed between these members 40 and 41.
According to this aspect, the longitudinal vibration transmitted from the lower structure B is absorbed by the coil spring 43 and is prevented from being transmitted to the upper structure G via the upper member 40.
Therefore, this structure is suitably applied to a seismic isolation floor and an anti-vibration precision machine base. Furthermore, it can be applied to small buildings.
（更に他の態様）
本発明は叙上の実施形態に限定されない。
叙上の実施形態では、可動台系２は可動台９に可動台枠１０を固設し、下面板２０の上面を拘束梁８に拘束してなるが、可動台９より上面が平滑な腕部材を延設し、該腕部材の上面を拘束梁８にて押圧する態様も採り得る。復帰機構は固定台系１と可動台系２との間に適宜介装される。
(Further aspect)
The present invention is not limited to the above embodiment.
In the embodiment described above, the movable platform 2 has the movable platform 9 fixed to the movable platform 9 and the upper surface of the lower surface plate 20 is restrained by the restraining beam 8, but the upper surface is smoother than the movable platform 9. A mode is also possible in which the member is extended and the upper surface of the arm member is pressed by the restraining beam 8. The return mechanism is appropriately interposed between the fixed base system 1 and the movable base system 2.
本発明は上記実施の形態に限定されるものではなく、本発明の基本的技術思想の範囲内で種々設計変更が可能である。 The present invention is not limited to the embodiment described above, and various design changes can be made within the scope of the basic technical idea of the present invention.
Ｓ…免震支持装置、１…基台系、２…可動台系、３…復帰機構、４…転がり機構、６…基台、６ａ…鍋状凹部、７…柱部材、８…拘束梁、９…可動台、１０…可動台枠、３０…コイルばね、３２…鍋状金具、３３…転動子
S: Seismic isolation support device, 1 ... Base system, 2 ... Movable base system, 3 ... Return mechanism, 4 ... Rolling mechanism, 6 ... Base, 6a ... Pan-shaped recess, 7 ... Column member, 8 ... Restraint beam, 9 ... Movable base, 10 ... Movable base frame, 30 ... Coil spring, 32 ... Pan-shaped metal fitting, 33 ... Roller
Claims (6)
前記基台系は、剛性体の基台と、前記基台に立設固定される複数の柱部材と、前記柱部材の上部において該柱部材間に剛性を保って架け渡される拘束梁とからなり、
前記可動台系は、前記基台の上面に水平方向に移動可能に上部構造の荷重を支持する剛性体の可動台が載置され、該可動台は前記拘束梁の下面に当接する反力受材を有し、
前記基台の上面には内周面が傾斜面をなし底面が平坦面を保持する広がり面を有する鍋状凹部が形成されるとともに、該鍋状凹部に小球状の多数の転動子が密実に一層を保って充填され、
前記可動台の下面は平坦状をなし、該転動子上に移動域を存して載置され、
前記基台系と可動台系との間には復帰機構が介装されてなる、
ことを特徴とする免震支持装置。 A base system linked to a lower structure such as a foundation or the ground; a movable base system installed on the base system to allow horizontal movement and linked to an upper structure such as a building, a machine, or a floor structure; In seismic isolation support devices,
The base system includes a base of a rigid body, a plurality of column members erected and fixed to the base, and a constraining beam bridged with rigidity between the column members at an upper portion of the column member. Become
In the movable platform system, a movable platform of a rigid body that supports the load of the upper structure is mounted on the upper surface of the base so as to be movable in the horizontal direction, and the movable platform receives a reaction force that contacts the lower surface of the restraining beam. Have materials,
The top surface of the base is formed with a pan-shaped recess having an inclined surface with an inner peripheral surface and a bottom surface that holds a flat surface, and a large number of small spherical rolling elements are densely packed in the pan-shaped recess. It is filled with a layer,
The lower surface of the movable base has a flat shape, and is placed on the rolling element with a moving area,
A return mechanism is interposed between the base system and the movable base system,
A seismic isolation support device.
前記基台系は、少なくとも剛性体の基台を有し、
前記可動台系は、前記基台の上面に水平方向に移動可能に上部構造の荷重を支持する剛性体の可動台が載置され、
前記基台の上面には内周面が傾斜面をなし底面が平坦面を保持する広がり面を有する鍋状凹部が形成されるとともに、該鍋状凹部に小球状の多数の転動子が密実に一層を保って充填され、
前記可動台の下面は平坦状をなし、該転動子上に移動域を存して載置されてなる、
ことを特徴とする免震支持装置。 A base system linked to a lower structure such as a foundation or the ground; a movable base system installed on the base system to allow horizontal movement and linked to an upper structure such as a building, a machine, or a floor structure; In seismic isolation support devices,
The base system has at least a rigid base,
The movable platform system is mounted with a movable platform of a rigid body that supports the load of the upper structure to be movable in the horizontal direction on the upper surface of the base.
The top surface of the base is formed with a pan-shaped recess having an inclined surface with an inner peripheral surface and a bottom surface that holds a flat surface, and a large number of small spherical rolling elements are densely packed in the pan-shaped recess. It is filled with a layer,
The lower surface of the movable base has a flat shape, and is placed on the rolling element with a moving area.
A seismic isolation support device.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0971303A (en) * | 1995-03-30 | 1997-03-18 | Kongo Kk | Movable shelf |
| JP2000104786A (en) * | 1998-09-28 | 2000-04-11 | Ohbayashi Corp | Floating preventive mechanism of base isolation device |
| JP2000304089A (en) * | 1999-04-21 | 2000-10-31 | Nippon Steel Corp | Falling preventive device for building and slip-out preventive device for laminate rubber isolator |
-
2003
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0971303A (en) * | 1995-03-30 | 1997-03-18 | Kongo Kk | Movable shelf |
| JP2000104786A (en) * | 1998-09-28 | 2000-04-11 | Ohbayashi Corp | Floating preventive mechanism of base isolation device |
| JP2000304089A (en) * | 1999-04-21 | 2000-10-31 | Nippon Steel Corp | Falling preventive device for building and slip-out preventive device for laminate rubber isolator |
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