JP2010185240A - Base-isolated structure and method for constructing the same - Google Patents

Base-isolated structure and method for constructing the same Download PDF

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JP2010185240A
JP2010185240A JP2009030827A JP2009030827A JP2010185240A JP 2010185240 A JP2010185240 A JP 2010185240A JP 2009030827 A JP2009030827 A JP 2009030827A JP 2009030827 A JP2009030827 A JP 2009030827A JP 2010185240 A JP2010185240 A JP 2010185240A
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seismic isolation
sliding
plate
support structure
mounting plate
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JP5385630B2 (en
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Atsuhiko Kobayashi
淳彦 小林
Atsushi Shigoka
淳 新後閑
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Senqcia Corp
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Hitachi Metals Techno Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a base-isolated structure which is excellent in supportability of equipment etc. installed in an upper position, restorability against shaking, and a damping capacity, if installable on a free-access floor, and to provide a method for constructing the base-isolated structure. <P>SOLUTION: Two each of longitudinal and lateral floor panels 29 adjacent to each other in a position corresponding to equipment installation portion 31 for installing the equipment etc. are removed. Subsequently, retainer members 33 and 35 are installed respectively on supporting legs 19. The retainer member 33 installed on both the sides of the equipment installation portion 31 is formed in such a shape as to have an L-shaped cross section while a hole, through which the supporting leg 19 can pass, is provided on one surface, and a fixing bracket 36 can be joined to the other surface. A supporting leg holding portion 43 is hooked on a nut 49 by the fixing bracket 36. This can prevent the upward backlash of the retainer member 33. Additionally, the horizontal backlash of the retainer member 33 can also be prevented because the supporting leg 19 is held from a vertical direction by a U-bolt 45 and a holding plate 38. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、フリーアクセスフロアに用いられる免震構造および免震構造の構築方法に関するものである。   The present invention relates to a seismic isolation structure used for a free access floor and a construction method of the seismic isolation structure.

従来、フリーアクセスフロア上に載置されるサーバ等の設備に対して免震機能を得るためには、フロア全体を免震構造にするか、または、フロアパネル上に簡易な免震装置を設置する方法が採られている。   Conventionally, in order to obtain a seismic isolation function for equipment such as servers placed on a free access floor, the entire floor is made a seismic isolation structure, or a simple seismic isolation device is installed on the floor panel. The method to be taken is taken.

しかし、フロア全体を免震構造とするような方法では、規模が大きくなるため、免震構造としての費用がかさみ、工期も長くなる。一方、フロアパネル上に簡易な免震装置を設置する場合には、地震時にフロアパネル自体の落下や浮き上がりなどの問題があり、特に上下方向の免震効果が小さい。また、サーバ部分のみを簡易な方法で確実に免震することが可能で、かつフリーアクセスフロアの一部に組み込まれる免震装置は存在しなかった。   However, the method of making the entire floor a seismic isolation structure increases the scale, which increases the cost of the seismic isolation structure and increases the construction period. On the other hand, when a simple seismic isolation device is installed on the floor panel, there is a problem that the floor panel itself falls or rises during an earthquake, and the vertical seismic isolation effect is particularly small. In addition, there is no seismic isolation device that can reliably isolate only the server portion by a simple method and is incorporated in a part of the free access floor.

従来より、建物などの免震に使用されている免震構造としては、例えば、上下のベアリングプレートに球径の剛性ボールを配置し地震による振動をベアリングプレート内の剛性ボールの転がり時の抵抗により吸収する地震アイソレーションベアリングがある（例えば、特許文献１参照）。   Conventionally, as a base isolation structure used for base isolation such as buildings, for example, rigid balls with a spherical diameter are arranged on the upper and lower bearing plates, and the vibration caused by the earthquake is caused by the resistance when the rigid balls in the bearing plate roll. There is a seismic isolation bearing that absorbs (see, for example, Patent Document 1).

特開２００２−２６６９３３号公報JP 2002-266933 A

しかしながら、特許文献１に記載の地震アイソレーションベアリングは、剛性ボールの転がり抵抗によって振動を吸収するが、転がり抵抗による振動エネルギーの吸収には限界があり、減衰能力があまり高くできないという問題がある。また、剛性ボールが振動によって上下のベアリングプレートから飛び出してしまう恐れがある。   However, the seismic isolation bearing described in Patent Document 1 absorbs vibration by rolling resistance of a rigid ball, but there is a limit to absorption of vibration energy by rolling resistance, and there is a problem that the damping capacity cannot be increased so much. Further, the rigid ball may jump out of the upper and lower bearing plates due to vibration.

また、剛性ボールと上下のベアリングプレートとの設置が点接触となるため、剛性ボールの剛性が極めて高くないと剛性ボールの変形や破損のおそれがあるという問題がある。   Further, since the installation of the rigid ball and the upper and lower bearing plates is a point contact, there is a problem that the rigid ball may be deformed or damaged unless the rigidity of the rigid ball is extremely high.

また、このような免震構造は通常の構造物に対して使用されるものであり、そもそもフリーアクセスフロアの免震構造として考慮されていない。すなわち、特許文献１の免震構造をどのようにフロアパネルに設置するかについては、全く考慮されていない。このため、フロアパネル上にこのまま設置しても、フロアパネルの浮き上がりや落下等の問題は解決できない。また、フロアパネル上に免震装置が設置されるため、免震装置の高さが高くなり、その上に設置される装置等がかえって不安定となるなどの問題がある。   Moreover, such a seismic isolation structure is used for a normal structure and is not considered as a seismic isolation structure for a free access floor. That is, no consideration is given to how the seismic isolation structure of Patent Document 1 is installed on the floor panel. For this reason, even if it installs on a floor panel as it is, problems, such as a floating and falling of a floor panel, cannot be solved. In addition, since the seismic isolation device is installed on the floor panel, there is a problem that the height of the seismic isolation device is increased and the device installed on the floor panel becomes unstable.

本発明は、このような問題に鑑みてなされたもので、その目的とするところは、フリーアクセスフロアに設置が可能であり、上方に設置される設備等の支承性、揺れに対する復元性、および減衰能力に優れる免震装置および免震構造の設置方法を提供することである。   The present invention has been made in view of such problems, and the object of the present invention is that it can be installed on a free access floor, the supportability of equipment installed above, the resilience to shaking, and It is to provide a seismic isolation device having excellent damping capacity and a method for installing a seismic isolation structure.

前述した目的を達成するための第１の発明は、フリーアクセスフロアに使用される免震構造であって、支持脚に設置される受け部材と、前記受け部材上に固定され、上方に摺動面を有し、上方からの重量を支持可能な下部支持構造体と、前記下部支持構造上に配置される摺動部材と、前記摺動部材上に配置され、下方に摺動面を有し、上方からの重量を支持可能な上部支持構造体と、を具備する免震装置が、水平方向に複数隣接して配置され、隣接する前記免震装置の前記上部支持構造体同士が、第１の連結部材で連結され、前記第１の連結部材による連結方向とは垂直方向に隣接する前記免震装置の前記上部支持構造体同士が、第２の連結部材で連結されることを特徴とする免震構造である。   A first invention for achieving the above-described object is a seismic isolation structure used for a free access floor, and a receiving member installed on a support leg, fixed on the receiving member, and slid upward. A lower support structure capable of supporting a weight from above, a sliding member disposed on the lower support structure, and a sliding surface disposed on the sliding member and having a sliding surface below A plurality of seismic isolation devices comprising a top support structure capable of supporting a weight from above; and a plurality of seismic isolation devices arranged in the horizontal direction adjacent to each other. The upper support structures of the seismic isolation device are connected by a second connecting member and are connected by a connecting member of the first seismic isolation device adjacent to each other in a direction perpendicular to the connecting direction by the first connecting member. Seismic isolation structure.

前記下部支持構造体は、支持脚上に設置され、固定される下フレームと、前記下フレーム上に固定される下取付プレートと、前記下取付プレート上に固定され、摺動面を有する下摺動プレートと、を有し、前記下フレーム、前記下取付プレートおよび前記下摺動プレートの一部または全部が一体または別体で形成されてもよい。また、前記上部支持構造体は、前記摺動部材上に配置され、摺動面を有する上摺動プレートと、前記上摺動プレート上に固定される上取付プレートと、前記上取付プレート上に固定される上フレームと、前記上フレーム上に固定される上プレートと、を有し、前記上摺動プレート、前記上取付プレート、前記上フレームおよび前記上プレートの一部または全部が一体または別体で形成されてもよい。   The lower support structure includes a lower frame installed and fixed on a support leg, a lower mounting plate fixed on the lower frame, and a lower slide fixed on the lower mounting plate and having a sliding surface. A part of or all of the lower frame, the lower mounting plate, and the lower sliding plate may be integrally or separately formed. The upper support structure is disposed on the sliding member and has an upper sliding plate having a sliding surface, an upper mounting plate fixed on the upper sliding plate, and an upper mounting plate. A fixed upper frame; and an upper plate fixed on the upper frame, wherein the upper sliding plate, the upper mounting plate, the upper frame, and a part or all of the upper plate are integrated or separated. It may be formed of a body.

前記免震装置における前記受け部材下端から前記上摺動プレート部下端までの厚さが、隣接して設置されているフロアパネルの厚さよりも厚いことが望ましい。前記免震装置が少なくとも縦横２個ずつ隣り合うように設置されてもよい。   It is desirable that the thickness from the lower end of the receiving member to the lower end of the upper sliding plate portion in the seismic isolation device is larger than the thickness of the floor panel that is installed adjacently. The seismic isolation devices may be installed so that at least two seismic isolation devices are adjacent to each other.

第１の発明の免震構造によれば、支持脚に設けられた受け部材が設けられ、この上に下部支持構造体が設置されるため、フリーアクセスフロアに確実に設置が可能である。さらに隣接する上部支持構造体同士が第１の連結部材で連結され、連結された上部支持構造体同士の連結方向とは垂直な方向で上部支持構造体同士が連結されているため、免震を受け持つ複数の免震装置が確実に連結され、フリーアクセスフロア上に確実に免震構造を構築することができる。また、上下の支持構造体がフレーム、プレート、摺動プレート等から形成されれば、製造および組立てが容易である。   According to the seismic isolation structure of the first invention, the receiving member provided on the support leg is provided, and the lower support structure is installed thereon, so that it can be reliably installed on the free access floor. Further, adjacent upper support structures are connected by the first connecting member, and the upper support structures are connected in a direction perpendicular to the connection direction of the connected upper support structures, so that seismic isolation is avoided. A plurality of seismic isolation devices in charge are securely connected, and a seismic isolation structure can be reliably constructed on the free access floor. Further, if the upper and lower support structures are formed of a frame, a plate, a sliding plate, etc., manufacture and assembly are easy.

また、受け部材の下端から上部支持構造体下端までの厚さが、周囲のフロアパネルの厚さよりも厚いため、免震装置が動作した際にも、上部支持構造体等がフロアパネルに接触することがない。   In addition, since the thickness from the lower end of the receiving member to the lower end of the upper support structure is larger than the thickness of the surrounding floor panel, the upper support structure etc. will contact the floor panel even when the seismic isolation device is operated. There is nothing.

また、免震装置を縦横２個ずつ隣接させて設置することで、上部に設置される装置等を安定して支承することができ、免震効果を確実に得ることができる。   In addition, by installing two seismic isolation devices adjacent to each other in the vertical and horizontal directions, it is possible to stably support the devices installed on the upper portion, and to reliably obtain the seismic isolation effect.

第２の発明は、フリーアクセスフロアに使用される免震構造の構築方法であって、免震構造の設置範囲の隣り合う複数のフロアパネルを撤去し、支持脚上に固定金具によって受け部材を設置し、前記受け部材上に、上方に摺動面を有し、上方からの重量を支持可能な下部支持構造体を設置し、前記下部支持構造体の摺動面上に摺動部材を配置し、前記摺動部材上に、下方に摺動面を有し、上方からの重量を支持可能な上部支持構造体を配置し、隣接して配置されている他の免震装置の上部支持構造体同士を第１の連結部材で連結し、前記第１の連結部材による連結方向とは垂直方向に隣接する他の免震装置の上部支持構造体を、第２の連結部材で連結することを特徴とする免震構造の構築方法である。
前記下部支持構造体は、前記受け部材上に下フレームを設置し、前記下フレーム上に下取付プレートを固定し、前記下取付プレート上に下摺動プレートを固定して構築され、前記上部支持構造体は、前記摺動部材上に上摺動プレートおよび上取付プレートが接合された上フレームおよび上プレートを配置して構築され、前記第１の連結部材で隣接する前記上フレーム同士を連結し、前記第２の連結部材で隣接する前記上プレート同士を連結してもよい。 A second invention is a method of constructing a seismic isolation structure used for a free access floor, wherein a plurality of adjacent floor panels in the installation range of the seismic isolation structure are removed, and a receiving member is mounted on a support leg by a fixing bracket. A lower support structure having a sliding surface on the upper side and capable of supporting the weight from above is installed on the receiving member, and the sliding member is disposed on the sliding surface of the lower support structure. On the sliding member, an upper support structure having a sliding surface on the lower side and capable of supporting the weight from above is arranged, and an upper support structure for another seismic isolation device arranged adjacent to the upper support structure. The bodies are connected by the first connecting member, and the upper support structure of another seismic isolation device adjacent in the direction perpendicular to the connecting direction by the first connecting member is connected by the second connecting member. This is a method of constructing a seismic isolation structure.
The lower support structure is constructed by installing a lower frame on the receiving member, fixing a lower mounting plate on the lower frame, and fixing a lower sliding plate on the lower mounting plate. The structure is constructed by arranging an upper frame and an upper plate in which an upper sliding plate and an upper mounting plate are joined on the sliding member, and connects the adjacent upper frames with the first connecting member. The upper plates adjacent to each other may be connected by the second connecting member.

第２の発明の免震構造の構築方法によれば、フロアパネルを撤去した部位に、免震装置を設置可能であるため、フリーアクセスフロア上に簡単かつ確実に免震構造を構築することができる。また、連結部材によって複数の免震装置が連結されるため、安定した免震機能を得ることができる。また、受け部材が支持脚に対して浮き上がることがなく、地震時に免震装置が浮き上がったり落下したりすることがない。   According to the construction method of the seismic isolation structure of the second invention, since the seismic isolation device can be installed at the site where the floor panel is removed, it is possible to construct the seismic isolation structure easily and reliably on the free access floor. it can. In addition, since a plurality of seismic isolation devices are connected by the connecting member, a stable seismic isolation function can be obtained. Further, the receiving member does not float with respect to the support leg, and the seismic isolation device does not float or fall during an earthquake.

本発明によれば、フリーアクセスフロアに好適であり、フリーアクセスフロアに設置が可能であれば、上方に設置される設備等の支承性、揺れに対する復元性、および減衰能力に優れる免震構造および免震構造の構築方法を提供することができる。   According to the present invention, if it is suitable for a free access floor and can be installed on the free access floor, the seismic isolation structure excellent in supportability of equipment installed above, resilience to shaking, and damping capacity and It is possible to provide a method for building a seismic isolation structure.

免震装置１を示す分解斜視図。1 is an exploded perspective view showing a seismic isolation device 1. 免震装置１が組み立てられた状態を示す図で、（ａ）は正面図、（ｂ）は摺動部材９近傍の拡大図。It is a figure which shows the state by which the seismic isolation apparatus 1 was assembled, (a) is a front view, (b) is an enlarged view of the sliding member 9 vicinity. 免震装置１の動作を示す図。The figure which shows operation | movement of the seismic isolation apparatus. 免震装置１の設置方法を示す図で、フロアパネル２９を撤去した状態を示す図。The figure which shows the installation method of the seismic isolation apparatus 1, and is the figure which shows the state which removed the floor panel 29. FIG. 受け部材３３、３５を設置した状態を示す図で（ａ）は平面図、（ｂ）は（ａ）のＥ−Ｅ線断面図。It is a figure which shows the state which installed the receiving members 33 and 35, (a) is a top view, (b) is the EE sectional view taken on the line of (a). 固定金具３６を示す図で、（ａ）は分解斜視図、（ｂ）は固定金具３６により受け部材３３を取り付けた状態を示す側面図、（ｃ）は固定金具３６により受け部材３３を取り付けた状態を示す正面図。FIG. 3A is an exploded perspective view of the fixing bracket 36, FIG. 2B is a side view illustrating a state in which the receiving member 33 is attached by the fixing bracket 36, and FIG. The front view which shows a state. 下フレーム３を設置した状態を示す図で（ａ）は平面図、（ｂ）は（ａ）のＥ−Ｅ線断面図。It is a figure which shows the state which installed the lower flame | frame 3, (a) is a top view, (b) is the EE sectional view taken on the line of (a). 下取付プレート５、下摺動プレート７を設置した状態を示す図で（ａ）は平面図、（ｂ）は（ａ）のＥ−Ｅ線断面図。The figure which shows the state which installed the lower attachment plate 5 and the lower sliding plate 7, (a) is a top view, (b) is the EE sectional view taken on the line of (a). 摺動部材９、上摺動プレート１１、上取付プレート１３、上フレーム１５を設置した状態を示す図で（ａ）は平面図、（ｂ）は（ａ）のＥ−Ｅ線断面図。It is a figure which shows the state which installed the sliding member 9, the upper sliding plate 11, the upper attachment plate 13, and the upper frame 15, (a) is a top view, (b) is the EE sectional view taken on the line of (a). 上プレート１７を設置した状態を示す図で、（ａ）は平面図、（ｂ）は（ａ）のＥ−Ｅ線断面図。It is a figure which shows the state which installed the upper plate 17, (a) is a top view, (b) is the EE sectional view taken on the line of (a). その他の実施例を示す図で、（ａ）は免震装置６０を示す図、（ｂ）は免震装置７０を示す図。It is a figure which shows another Example, (a) is a figure which shows the seismic isolation apparatus 60, (b) is a figure which shows the seismic isolation apparatus 70.

以下、図面に基づいて、本発明の実施の形態を詳細に説明する。図１は、本発明にかかる免震装置１の分解斜視図であり、図２は組み立てられた状態を示す図である。免震装置１は、主に、下フレーム３、下取付プレート５、下摺動プレート７、摺動部材９、上摺動プレート１１、上取付プレート１３、上フレーム１５、上プレート１７等から構成される。なお、以下の説明において、特に必要がない限り、各部材の取り付けに用いられるボルトやナット等は図示を省略する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a seismic isolation device 1 according to the present invention, and FIG. 2 is a view showing an assembled state. The seismic isolation device 1 mainly includes a lower frame 3, a lower mounting plate 5, a lower sliding plate 7, a sliding member 9, an upper sliding plate 11, an upper mounting plate 13, an upper frame 15, an upper plate 17, and the like. Is done. In the following description, unless otherwise specified, illustrations of bolts and nuts used for attaching each member are omitted.

下フレーム３は、免震装置１の下側の強度を確保するためのフレームであり、例えば角鋼管等を所定の形状に溶接等により接合したものである。下フレーム３の長手方向の長さは、設置されるフリーアクセスフロア用のフロアパネルの１辺長さと略同一の長さとなる。なお、下フレーム３は、図２に示すように、支持脚１９上に設置される。   The lower frame 3 is a frame for ensuring the strength of the lower side of the seismic isolation device 1, and is formed by joining, for example, a square steel pipe or the like into a predetermined shape by welding or the like. The length of the lower frame 3 in the longitudinal direction is substantially the same as the length of one side of the floor panel for the free access floor to be installed. The lower frame 3 is installed on the support leg 19 as shown in FIG.

下フレーム３上には、図示を省略したボルト等によって下取付プレート５が設けられる。下取付プレート５は下摺動プレート７と下フレーム３とを接合する板状部材である。下取付プレート５の一部には孔６が設けられる。孔６には下摺動プレート７の下面の一部が露出する。   A lower mounting plate 5 is provided on the lower frame 3 by bolts or the like not shown. The lower mounting plate 5 is a plate-like member that joins the lower sliding plate 7 and the lower frame 3 together. A hole 6 is provided in a part of the lower mounting plate 5. A part of the lower surface of the lower sliding plate 7 is exposed in the hole 6.

下取付プレート５上には、図示を省略したボルト等によって下摺動プレート７が設置される。下摺動プレート７は、図中下方に向かって凸形状（上面が凹形状）の曲面を有する、例えばステンレス製の板状部材である。下摺動プレート７の曲面部が摺動部材９の摺動範囲となる。   A lower sliding plate 7 is installed on the lower mounting plate 5 by bolts or the like not shown. The lower sliding plate 7 is a plate-like member made of, for example, stainless steel having a curved surface that protrudes downward in the drawing (the upper surface is concave). The curved surface portion of the lower sliding plate 7 becomes the sliding range of the sliding member 9.

下摺動プレート７の曲面は摺動範囲において一定の曲率である。すなわち、下摺動プレート７の摺動範囲は、所定の径の球体の外面の一部を切り出したような形状である。なお、下摺動プレート７の摺動範囲の大きさは、設置する位置などにもよるが、例えば３００〜４００ｍｍであれば良く、曲面の半径は例えば２０００ｍｍ程度であればよい。下摺動プレート７は、プレスや切り出しなどいずれの方法で製造されてよい。   The curved surface of the lower sliding plate 7 has a constant curvature in the sliding range. That is, the sliding range of the lower sliding plate 7 is a shape obtained by cutting out a part of the outer surface of a sphere having a predetermined diameter. Note that the size of the sliding range of the lower sliding plate 7 depends on the installation position, but may be, for example, 300 to 400 mm, and the radius of the curved surface may be, for example, about 2000 mm. The lower sliding plate 7 may be manufactured by any method such as pressing or cutting.

なお、一定の曲率を有する凹曲面とは、曲面全体がどの位置においても三次元的に同一の曲率を有することを意味し、所定の径の球体の一部の曲面で構成されることを意味する。   The concave curved surface having a certain curvature means that the entire curved surface has the same curvature in three dimensions at any position, and means that it is composed of a part of a curved surface of a sphere having a predetermined diameter. To do.

下摺動プレート７の摺動範囲には摺動部材９が載置される。摺動部材９は、例えばフッ化樹脂製である。摺動部材９の下面は、下摺動プレート７の曲面と同一の曲面を有する凸形状である。すなわち、下摺動プレート７の凹曲面と摺動部材９の凸局面とは面で接触する。   A sliding member 9 is placed in the sliding range of the lower sliding plate 7. The sliding member 9 is made of, for example, a fluororesin. The lower surface of the sliding member 9 has a convex shape having the same curved surface as that of the lower sliding plate 7. That is, the concave curved surface of the lower sliding plate 7 and the convex surface of the sliding member 9 are in contact with each other.

ここで、摺動部材９の接触面が、下摺動プレート７の凹曲面に対応する凸曲面であるとは、下摺動プレート７の凹曲面と同一の曲率（すなわち、同一径の球体の一部の曲面）を有し、下摺動プレート７との接触面方向に凸形状であることを意味する。また、下摺動プレート７の摺動部材９との接触面が凹曲面であるとは、摺動部材９から見て接触面が凹形状であることを意味する。   Here, that the contact surface of the sliding member 9 is a convex curved surface corresponding to the concave curved surface of the lower sliding plate 7 is the same curvature as the concave curved surface of the lower sliding plate 7 (that is, a sphere having the same diameter). Means a convex shape in the contact surface direction with the lower sliding plate 7. Further, that the contact surface of the lower sliding plate 7 with the sliding member 9 is a concave curved surface means that the contact surface is concave when viewed from the sliding member 9.

なお、摺動部材９は例えば５０ｍｍ高さで６０φの略円柱状形状（上下面が凸曲面）である。摺動部材９が安定して機能するためには、摺動部材９の高さは、外径よりも低いことが望ましい。なお、摺動部材９の形状は、円柱状には限られない。   The sliding member 9 has, for example, a substantially cylindrical shape with a height of 50 mm and a diameter of 60 mm (upper and lower surfaces are convex curved surfaces). In order for the sliding member 9 to function stably, the height of the sliding member 9 is preferably lower than the outer diameter. The shape of the sliding member 9 is not limited to a cylindrical shape.

摺動部材９上には上摺動プレート１１が設置される。なお、上摺動プレート１１、上取付プレート１３、上フレーム１５は、前述した下摺動プレート７、下取付プレート５、下フレーム３をちょうど摺動部材９に対して上下反対向きとした形態である。したがって、詳細な説明を省略する。   An upper sliding plate 11 is installed on the sliding member 9. The upper sliding plate 11, the upper mounting plate 13, and the upper frame 15 are configured in such a manner that the lower sliding plate 7, the lower mounting plate 5, and the lower frame 3 are vertically opposite to the sliding member 9. is there. Therefore, detailed description is omitted.

図２（ｂ）は、組み立てられた状態での摺動部材９近傍の拡大図である。前述のように、摺動部材９は、下摺動プレート７と上摺動プレート１１とに挟まれて、それぞれに対して摺動可能に配置される。下摺動プレート７の摺動部材９との接触面（上面）は凹曲面２３（曲面の曲率はＣ）であり、これに接する摺動部材９の下面は、凸曲面２７（曲面の曲率はＤ）である。   FIG. 2B is an enlarged view of the vicinity of the sliding member 9 in an assembled state. As described above, the sliding member 9 is sandwiched between the lower sliding plate 7 and the upper sliding plate 11 and is slidably disposed with respect to each other. The contact surface (upper surface) of the lower sliding plate 7 with the sliding member 9 is a concave curved surface 23 (the curvature of the curved surface is C), and the lower surface of the sliding member 9 in contact therewith is a convex curved surface 27 (the curvature of the curved surface is D).

同様に、上摺動プレート１１の摺動部材９との接触面（下面）は凹曲面２１（曲面の曲率はＡ）であり、これに接する摺動部材９の上面は、凸曲面２５（曲面の曲率はＢ）である。この場合、ＡとＢとが一致し、ＣとＤとが一致する。   Similarly, the contact surface (lower surface) of the upper sliding plate 11 with the sliding member 9 is a concave curved surface 21 (the curvature of the curved surface is A), and the upper surface of the sliding member 9 in contact therewith is a convex curved surface 25 (curved surface). The curvature of is B). In this case, A and B match, and C and D match.

なお、上摺動プレート１１の摺動範囲の曲率Ａと、下摺動プレートの曲率Ｃとは同じであることが望ましいが、曲率を変えてもよい。この場合、摺動部材９の上下面の曲率を変えて、それぞれ上下の摺動プレートの曲面に合わせた曲面（凸曲面）を有すれば良い。   Although it is desirable that the curvature A of the sliding range of the upper sliding plate 11 and the curvature C of the lower sliding plate are the same, the curvature may be changed. In this case, it is only necessary to change the curvature of the upper and lower surfaces of the sliding member 9 to have curved surfaces (convex curved surfaces) that match the curved surfaces of the upper and lower sliding plates.

上フレーム１５の上には上プレート１７が設けられる。上プレート１７は、実際に設備等が設置される床となる部位である。なお、図１に示すように、上プレート１７の上面の対向する辺に、一対の連結部１８が設けられる。連結部１８は、他の部位よりもやや厚さが薄い部位であり、辺に沿って設けられる。免震装置１の連結については、後述する。   An upper plate 17 is provided on the upper frame 15. The upper plate 17 is a part that becomes a floor on which equipment and the like are actually installed. As shown in FIG. 1, a pair of connecting portions 18 are provided on opposite sides of the upper surface of the upper plate 17. The connecting portion 18 is a portion that is slightly thinner than other portions, and is provided along the side. The connection of the seismic isolation device 1 will be described later.

次に、免震装置１の動作について説明する。図３は、免震装置１の動作を示す図である。免震装置１が設置された状態で地震等の揺れが発生すると、支持脚１９（床面）に固定されている下フレーム３、下取付プレート５、下摺動プレート７が一体となって変位する。この際、摺動部材９の下面は下摺動プレート７の摺動範囲（曲面部）との間を曲面に沿って摺動する。   Next, the operation of the seismic isolation device 1 will be described. FIG. 3 is a diagram illustrating the operation of the seismic isolation device 1. When a vibration such as an earthquake occurs with the seismic isolation device 1 installed, the lower frame 3, the lower mounting plate 5, and the lower sliding plate 7 fixed to the support leg 19 (floor surface) are displaced together. To do. At this time, the lower surface of the sliding member 9 slides along the curved surface between the sliding range (curved surface portion) of the lower sliding plate 7.

更に、設備等が設置されている上プレート１７と一体に固定されている、上フレーム１５、上取付プレート１３、上摺動プレート１１が摺動部材９に対して変位する。すなわち、摺動部材９の上面は上摺動プレート１１の摺動範囲（曲面部）との間を曲面に沿って摺動する。   Further, the upper frame 15, the upper mounting plate 13, and the upper sliding plate 11 that are fixed integrally with the upper plate 17 on which equipment and the like are installed are displaced with respect to the sliding member 9. That is, the upper surface of the sliding member 9 slides along the curved surface between the sliding range (curved surface portion) of the upper sliding plate 11.

図３（ａ）、図３（ｂ）は揺れに対してそれぞれ逆の方向に変位した状態である。免震装置１は、揺れに対して、図３（ａ）、図３（ｂ）の状態を繰り返して、この際の摺動部材９と上下の摺動プレートとの摺動に伴う摩擦によって揺れを減衰する。免震装置１の最大変位量は、図３（ａ）と図３（ｂ）との間の変位量である。すなわち、摺動部材９が上下の摺動プレートそれぞれに対して摺動するため、各摺動プレートの摺動範囲の略２倍の変位量を得ることができる。なお、揺れが収まると、摺動部材９は、最も安定位置である各摺動プレートの略中心の位置で停止する。したがって、復元力も高い。   FIG. 3A and FIG. 3B show a state where they are displaced in opposite directions with respect to the shaking. The seismic isolation device 1 repeats the states shown in FIGS. 3A and 3B in response to the shaking, and the shaking is caused by the friction caused by the sliding between the sliding member 9 and the upper and lower sliding plates. Attenuate. The maximum displacement amount of the seismic isolation device 1 is a displacement amount between FIG. 3 (a) and FIG. 3 (b). That is, since the sliding member 9 slides with respect to the upper and lower sliding plates, a displacement amount approximately twice the sliding range of each sliding plate can be obtained. When the shaking is stopped, the sliding member 9 stops at a position substantially at the center of each sliding plate which is the most stable position. Therefore, the restoring force is also high.

なお、この際、下摺動プレート７と上摺動プレート１１の各凹曲面２１、２３の曲率が同じであれば、上下摺動プレートは、それぞれ、摺動部材９に対して略同じ変位量となる。たとえば、摺動部材９が下摺動プレート７に対して所定量摺動すると、摺動部材９の軸方向（上下凸曲面２５、２７方向）は、下摺動プレート７の曲率に応じて、下摺動プレート７の曲率中心方向に傾く。この際、同様に上摺動プレート１１の曲面とも接触するため、上摺動プレート１１の曲率中心を向くように上摺動プレート１１と摺動部材７とが摺動する。したがって、下摺動プレート７および上摺動プレート１１と摺動部材９との摺動量はほぼ同じとなる。   At this time, if the concave curved surfaces 21 and 23 of the lower sliding plate 7 and the upper sliding plate 11 have the same curvature, the upper and lower sliding plates respectively have substantially the same displacement amount with respect to the sliding member 9. It becomes. For example, when the sliding member 9 slides by a predetermined amount with respect to the lower sliding plate 7, the axial direction of the sliding member 9 (upper and lower convex curved surfaces 25 and 27) depends on the curvature of the lower sliding plate 7. The lower sliding plate 7 is inclined toward the center of curvature. At this time, since the curved surface of the upper sliding plate 11 is also contacted, the upper sliding plate 11 and the sliding member 7 slide so as to face the center of curvature of the upper sliding plate 11. Therefore, the sliding amounts of the lower sliding plate 7 and the upper sliding plate 11 and the sliding member 9 are substantially the same.

次に、免震装置１の設置方法を説明する。図４〜図１０は、免震装置１（およびこれを用いた免震構造）の設置方法を示す図である。なお、免震機能を得るためには、例えば免震装置１が４台１セットで設置して用いられる。まず、図４に示すように、設備等を設置する装置設置部３１に該当する位置のフロアパネル２９を撤去する。フロアパネル２９の撤去によって、撤去したフロアパネル２９を支持していた支持脚１９が露出する。なお、免震装置１を４台設置するために、隣接する縦横２枚のフロアパネル２９が撤去される。   Next, the installation method of the seismic isolation apparatus 1 is demonstrated. 4-10 is a figure which shows the installation method of the seismic isolation apparatus 1 (and seismic isolation structure using the same). In order to obtain the seismic isolation function, for example, four seismic isolation devices 1 are installed and used as one set. First, as shown in FIG. 4, the floor panel 29 at a position corresponding to the device installation unit 31 for installing facilities and the like is removed. By removing the floor panel 29, the support leg 19 supporting the removed floor panel 29 is exposed. In addition, in order to install four seismic isolation devices 1, two adjacent vertical and horizontal floor panels 29 are removed.

次に、図５に示すように、支持脚１９上に受け部材３３、３５を設置する。図５（ａ）は受け部材３３、３５を設置した状態の平面図、図５（ｂ）はＥ−Ｅ線断面図である。なお、以下の説明では、特に説明のない限り、各図（ａ）を平面図、各図（ｂ）を対応する各図（ａ）のＥ−Ｅ線断面図として示す。受け部材３３、３５は、それぞれフロアパネル２９の２枚分の長さの棒状部材である。   Next, as shown in FIG. 5, receiving members 33 and 35 are installed on the support leg 19. Fig.5 (a) is a top view of the state which installed the receiving members 33 and 35, FIG.5 (b) is EE sectional view taken on the line. In the following description, unless otherwise specified, each figure (a) is shown as a plan view, and each figure (b) is shown as a cross-sectional view taken along line EE of each corresponding figure (a). Each of the receiving members 33 and 35 is a rod-like member having a length corresponding to two sheets of the floor panel 29.

図５（ｂ）に示すように、装置設置部３１の両側に設置される受け部材３３はＬ字断面形状であり、一方の面は支持脚１９が貫通可能な穴が設けられており、他方の面には固定金具３６が接合可能である。同様に、装置設置部３１の中央に設置される受け部材３５は、コの字断面形状であり、上面には支持脚１９が貫通可能な穴が設けられており、側面には固定金具３６が接合可能である。   As shown in FIG. 5B, the receiving members 33 installed on both sides of the apparatus installation portion 31 have an L-shaped cross-sectional shape, and one surface is provided with a hole through which the support leg 19 can pass, The fixing bracket 36 can be joined to the surface. Similarly, the receiving member 35 installed at the center of the apparatus installation portion 31 has a U-shaped cross-sectional shape, and a hole through which the support leg 19 can pass is provided on the upper surface, and a fixing bracket 36 is provided on the side surface. Can be joined.

図６は固定金具３６を示す図であり、図６（ａ）は固定金具３６の分解斜視図、図６（ｂ）は固定金具３６により受け部材３３を取り付けた状態の側面図、図６（ｃ）は固定金具３６により受け部材３３を取り付けた状態の正面図である。なお、受け部材３５との取付状態は受け部材３３との取付状態と同一であるので説明を省略する。   6A and 6B are views showing the fixing bracket 36, FIG. 6A is an exploded perspective view of the fixing bracket 36, FIG. 6B is a side view of the receiving member 33 attached by the fixing bracket 36, and FIG. c) is a front view of a state in which the receiving member 33 is attached by the fixing bracket 36. FIG. In addition, since the attachment state with the receiving member 35 is the same as the attachment state with the receiving member 33, description is abbreviate | omitted.

固定金具３６は、本体４１、押さえ板３８、Ｕボルト４５等から構成される。本体４１は、Ｌ字断面形状を有する板状部材であり、受け部材接合部３９および支持脚保持部４３の２面を有する。受け部材接合部３９は受け部材３３、３５と接合される面であり、接合用のボルト孔が設けられる。支持脚保持部４３は、支持脚を保持する部位であり、支持脚１９（支持脚１９の軸４７（図６（ｂ）、図６（ｃ）参照））が貫通する切欠き部４２が設けられる。   The fixing bracket 36 includes a main body 41, a pressing plate 38, a U bolt 45, and the like. The main body 41 is a plate-shaped member having an L-shaped cross-sectional shape, and has two surfaces, a receiving member joint portion 39 and a support leg holding portion 43. The receiving member joint portion 39 is a surface to be joined to the receiving members 33 and 35 and is provided with a bolt hole for joining. The support leg holding part 43 is a part that holds the support leg, and is provided with a notch 42 through which the support leg 19 (the shaft 47 of the support leg 19 (see FIGS. 6B and 6C)) passes. It is done.

押さえ板３８は、Ｌ字断面形状の板状部材であり、一方の面が本体４１の支持脚保持部４３上にボルト等によって設けられる。押さえ板３８は、Ｕ字状の切欠き部４２の開口部を塞ぐように、切り欠き部４２の両側にまたがるように、かつ支持脚保持部４３端部と押さえ板３８端部が略揃うように設置される。   The holding plate 38 is a plate-shaped member having an L-shaped cross section, and one surface is provided on the support leg holding portion 43 of the main body 41 by a bolt or the like. The presser plate 38 covers both sides of the notch 42 so as to block the opening of the U-shaped notch 42 and the end of the support leg holding part 43 and the end of the presser plate 38 are substantially aligned. Installed.

押さえ板３８のもう一方の面は、本体４１の受け部材接合部３９側に向けられて配置され、受け部材接合部３９側からＵボルト４５が貫通し、ナットによって固定される。Ｕボルト４５のボルト間隔は、間に支持脚１９（ナット４９）が貫通可能な大きさである。   The other surface of the pressing plate 38 is arranged facing the receiving member joint portion 39 side of the main body 41, and the U-bolt 45 penetrates from the receiving member joint portion 39 side and is fixed by a nut. The bolt interval of the U bolt 45 is such that the support leg 19 (nut 49) can pass therethrough.

図６（ｂ）、図６（ｃ）に示すように、本体４１の受け部材接合部３９は、受け部材３３の側面と重ねられ、ボルトで接合される。本体４１の支持脚保持部４３は、切欠き部４２に支持脚１９の軸４７が挿入されて取り付けられる。この際、支持脚１９の取り付け用のナット４９の外径は、切欠き部４２の切欠き幅よりも大きい。したがって、本体４１は、支持脚保持部４３がナット４９の下側に引っ掛かった状態となる。   As shown in FIGS. 6B and 6C, the receiving member joining portion 39 of the main body 41 is overlapped with the side surface of the receiving member 33 and joined with a bolt. The support leg holding part 43 of the main body 41 is attached by inserting the shaft 47 of the support leg 19 into the notch part 42. At this time, the outer diameter of the nut 49 for attaching the support leg 19 is larger than the notch width of the notch portion 42. Therefore, the main body 41 is in a state where the support leg holding portion 43 is hooked on the lower side of the nut 49.

この状態で、切欠き部４２のＵ字部と押さえ板３８によって支持脚１９を挟み込むように、押さえ板３８を支持脚保持部４３に取り付ける。更に、Ｕボルト４５が支持脚１９を抱え込むようにＵボルト４５を設置し、Ｕボルト４５の両端部をナットで押さえ板３８に固定する。   In this state, the pressing plate 38 is attached to the supporting leg holding portion 43 so that the supporting leg 19 is sandwiched between the U-shaped portion of the notch portion 42 and the pressing plate 38. Further, the U bolt 45 is installed so that the U bolt 45 holds the support leg 19, and both ends of the U bolt 45 are fixed to the holding plate 38 with nuts.

受け部材３３が支持脚１９上に載置されたのみでは、支持脚１９と受け部材３３とのクリアランスによって、受け部材３３は支持脚１９に対して水平方向にガタが生じるおそれがある。さらに受け部材３３は上方にはフリーであるため、垂直方向の揺れの際に、受け部材３３が支持脚１９に対して浮き上がる恐れがある。   If the receiving member 33 is merely placed on the support leg 19, there is a possibility that the receiving member 33 may be loose in the horizontal direction with respect to the support leg 19 due to the clearance between the support leg 19 and the receiving member 33. Furthermore, since the receiving member 33 is free upward, the receiving member 33 may be lifted with respect to the support leg 19 when the receiving member 33 swings in the vertical direction.

しかし、固定金具３６によって、支持脚保持部４３がナット４９に引っ掛かる。このため、受け部材３３の上方へのガタを防止でき、さらにＵボルト４５と押さえ板３８によって支持脚１９を上下方向から抱え込むため、受け部材３３の水平方向へのガタも防止できる。以上により、受け部材３３が支持脚１９に確実に固定される。なお、受け部材３３、３５と支持脚１９との固定は、この形態に限られない。受け部材３３、３５が支持脚１９に対してずれたり浮き上がったりしなければよく、例えば、板状等の固定部材を支持脚１９と受け部材に直接ボルト等で固定してもよく、その形態は問わない。   However, the support leg holding portion 43 is caught by the nut 49 by the fixing bracket 36. For this reason, the backlash of the receiving member 33 can be prevented, and further, since the support leg 19 is held from the vertical direction by the U bolt 45 and the pressing plate 38, the backlash of the receiving member 33 in the horizontal direction can also be prevented. Thus, the receiving member 33 is securely fixed to the support leg 19. The fixing of the receiving members 33 and 35 and the support leg 19 is not limited to this form. The receiving members 33 and 35 do not have to be displaced or lifted with respect to the support leg 19. For example, a plate-like fixing member may be directly fixed to the support leg 19 and the receiving member with a bolt or the like. It doesn't matter.

次に、図７に示すように受け部材３３、３５上に下フレーム３を設置する。下フレーム３は、それぞれ受け部材３３、３５をまたぐように４台設置される。なお、下フレーム３と受け部材３３、３５とは図示を省略したボルトで接合される。   Next, the lower frame 3 is installed on the receiving members 33 and 35 as shown in FIG. Four lower frames 3 are installed so as to straddle the receiving members 33 and 35, respectively. The lower frame 3 and the receiving members 33 and 35 are joined with bolts (not shown).

次に、図８に示すように、下フレーム３上に下取付プレート５、下摺動プレート７をそれぞれ設置する。この際、下摺動プレート７が設備設置範囲の４隅に均等な位置に来るように配置する。   Next, as shown in FIG. 8, the lower mounting plate 5 and the lower sliding plate 7 are respectively installed on the lower frame 3. At this time, the lower sliding plate 7 is arranged so as to come to equal positions at the four corners of the equipment installation range.

次に、図９に示すように、下摺動プレート７上に摺動部材９を配置し、その上方に上摺動プレート１１、上取付プレート１３、上フレーム１５を設置する。なお、上摺動プレート１１、上取付プレート１３、上フレーム１５はあらかじめそれぞれを接合して一体化しておいてもよい。この際、下摺動プレート７と上摺動プレート１１とが上下に同一の位置に来るように配置し、摺動部材９が下摺動プレート７と上摺動プレート１１それぞれの中心に来るように配置する。   Next, as shown in FIG. 9, the sliding member 9 is disposed on the lower sliding plate 7, and the upper sliding plate 11, the upper mounting plate 13, and the upper frame 15 are installed above the sliding member 9. Note that the upper sliding plate 11, the upper mounting plate 13, and the upper frame 15 may be joined and integrated in advance. At this time, the lower sliding plate 7 and the upper sliding plate 11 are arranged so as to be in the same position vertically, so that the sliding member 9 is located at the center of each of the lower sliding plate 7 and the upper sliding plate 11. To place.

上フレーム１５は、略長方形であり、上フレーム１５の長辺方向（図９（ａ）左右方向）には隣接する上フレーム１５同士が接触し、上フレーム１５の短辺方向（図９（ａ）上下方向）に隣り合う上フレーム１５同士は、それぞれ上フレーム１５の下方で連結部材３７によって接合される。なお、上フレーム１５の短辺方向とは、受け部材３３、３５の設置方向である。連結部材３７はＬ字断面形状の棒状部材である。連結部材３７によって、短辺方向に隣り合う免震装置１同士が連結される。   The upper frame 15 is substantially rectangular, and the adjacent upper frames 15 are in contact with each other in the long side direction (FIG. 9 (a) left-right direction) of the upper frame 15, and the short side direction (FIG. 9 (a) The upper frames 15 adjacent to each other in the vertical direction are joined to each other by the connecting member 37 below the upper frame 15. The short side direction of the upper frame 15 is the installation direction of the receiving members 33 and 35. The connecting member 37 is a bar-shaped member having an L-shaped cross section. The seismic isolation devices 1 adjacent in the short side direction are connected to each other by the connecting member 37.

なお、この際、支持脚上端部から摺動部材９の上面までの総厚さは、隣接するフロアパネル２９の厚さよりも厚い。すなわち、上摺動プレート１１下面は、隣接するフロアパネル２９の上面よりも高い位置となる。したがって、上摺動プレート１１およびこれと一体化された各部材が地震等により変位する際に、隣接するフロアパネル２９と干渉することがない。   At this time, the total thickness from the upper end portion of the support leg to the upper surface of the sliding member 9 is thicker than the thickness of the adjacent floor panel 29. That is, the lower surface of the upper sliding plate 11 is positioned higher than the upper surface of the adjacent floor panel 29. Therefore, when the upper sliding plate 11 and each member integrated with the upper sliding plate 11 are displaced by an earthquake or the like, they do not interfere with the adjacent floor panel 29.

次に、図１０に示すように、上フレーム１５上に上プレート１７を設置する。なお、上プレート１７は略長方形であり、上プレート１７の長辺方向（図１０（ａ）左右方向）には隣接する上プレート１７同士が接触する。前述の通り、上プレート１７上面短辺側には連結部１８が設けられる。上プレート１７の長辺側に隣接する上プレート１７同士（図１０（ａ）左右方向）は、互いの連結部１８をまたぐように連結部材５３が設置され、さらに、対向する短辺方向（図中上下方向）に隣り合う上プレート１７のそれぞれの連結部１８に接合される。これにより、４枚の上プレート１７同士（免震装置１同士）が連結される。   Next, as shown in FIG. 10, the upper plate 17 is installed on the upper frame 15. The upper plate 17 has a substantially rectangular shape, and adjacent upper plates 17 are in contact with each other in the long side direction (the left-right direction in FIG. 10A) of the upper plate 17. As described above, the connecting portion 18 is provided on the short side of the upper surface of the upper plate 17. In the upper plates 17 adjacent to each other on the long side of the upper plate 17 (FIG. 10 (a), left and right direction), a connecting member 53 is installed so as to straddle each other's connecting portion 18, and the opposing short side direction (see FIG. It joins to each connection part 18 of the upper plate 17 adjacent to a middle up-down direction. Thereby, four upper plates 17 (seismic isolation devices 1) are connected.

連結に使用されない連結部１８は塞ぎ部材５１によって塞がれる。塞ぎ部材５１は板状部材である。なお、連結部材５３、塞ぎ部材５１は、連結部１８の段深さとほぼ同厚みであり、それらを取り付けた状態で、上プレート１７上は平な面となる。以上により、免震装置１が４台セットされ、それぞれが一体化されて使用される。   The connecting portion 18 that is not used for connection is closed by the closing member 51. The closing member 51 is a plate-like member. The connecting member 53 and the closing member 51 have substantially the same thickness as the step depth of the connecting portion 18, and the upper plate 17 is a flat surface when they are attached. As described above, four seismic isolation devices 1 are set and are used in an integrated manner.

以上説明したように、本発明の実施形態にかかる免震構造によれば、フロアパネル２９を撤去した部位に、免震装置１を設置可能であるため、フリーアクセスフロア上に簡単に免震構造を構築することができる。また、支持脚１９に設けられた受け部材３３、３５が設けられ、この上に下フレーム３から順に上フレーム１５および上プレート１７までが設置される。このため、フリーアクセスフロアに確実に設置が可能である。   As described above, according to the seismic isolation structure according to the embodiment of the present invention, since the seismic isolation device 1 can be installed at the site where the floor panel 29 is removed, the seismic isolation structure can be easily provided on the free access floor. Can be built. Further, receiving members 33 and 35 provided on the support leg 19 are provided, and the upper frame 15 and the upper plate 17 are installed in this order from the lower frame 3 thereon. For this reason, it can be reliably installed on the free access floor.

さらに隣接する上フレーム１５同士が連結部材３７で連結され、連結された上フレーム１５同士の連結方向とは垂直な方向で上プレート１７同士が連結部材５３により連結されているため、免震を受け持つ複数の免震装置１が確実に連結され、フリーアクセスフロア上に確実に免震構造を構築することができる。また、固定金具３６を用いるため、受け部材３３、３５が支持脚１９に対してずれたり浮き上がったりすることがなく、地震時に免震装置１が浮き上がったり落下したりすることがない。   Further, the adjacent upper frames 15 are connected to each other by a connecting member 37, and the upper plates 17 are connected to each other by a connecting member 53 in a direction perpendicular to the connecting direction of the connected upper frames 15 to each other. A plurality of seismic isolation devices 1 are securely connected, and a seismic isolation structure can be reliably constructed on the free access floor. Further, since the fixing bracket 36 is used, the receiving members 33 and 35 are not displaced or lifted with respect to the support leg 19, and the seismic isolation device 1 is not lifted or dropped during an earthquake.

また、受け部材３３、３５の下端から上摺動プレート１１下端までの厚さが、周囲のフロアパネル２９の厚さよりも厚いため、免震装置が動作した際にも、上摺動プレート１１等がフロアパネル２９に接触することがない。   Further, since the thickness from the lower end of the receiving members 33, 35 to the lower end of the upper sliding plate 11 is thicker than the thickness of the surrounding floor panel 29, the upper sliding plate 11 etc. Does not touch the floor panel 29.

また、免震装置を縦横２個ずつ隣接させて設置することで、上部に設置される装置等を安定して支承することができ、免震効果を確実に得ることができる。   In addition, by installing two seismic isolation devices adjacent to each other in the vertical and horizontal directions, it is possible to stably support the devices installed on the upper portion, and to reliably obtain the seismic isolation effect.

また、摺動部材９と、下摺動プレート７および上摺動プレート１１とのそれぞれの接触面が、対応する曲面を有しているため、摺動部材９と各摺動プレートとが面接触する。このため、摺動部材９が各摺動プレートに対して摺動する際の摩擦による減衰能力が高い。また、上方からの重量を面で受けることができるため、高い支承力を得ることができる。また、各摺動プレートの中央位置が、曲面の頂点となり、上方から力を受けた際に、摺動部材９が各摺動プレートの中心位置（原位置）に安定するため、高い復元力を得ることができる。   Further, since the contact surfaces of the sliding member 9 and the lower sliding plate 7 and the upper sliding plate 11 have corresponding curved surfaces, the sliding member 9 and each sliding plate are in surface contact. To do. For this reason, the damping capability by friction when the sliding member 9 slides with respect to each sliding plate is high. Further, since the weight from above can be received by the surface, a high bearing force can be obtained. In addition, the center position of each sliding plate becomes the apex of the curved surface, and when receiving a force from above, the sliding member 9 is stabilized at the center position (original position) of each sliding plate. Obtainable.

また、下摺動プレート７および上摺動プレート１１がそれぞれ摺動部材９に対して摺動するため、免震装置１の最大（水平）変位は、下摺動プレート７および上摺動プレート１１の摺動範囲の和（厳密には摺動部材９の大きさを除く）となるため、小さな装置で大きな変位を得ることができる。   Further, since the lower sliding plate 7 and the upper sliding plate 11 slide relative to the sliding member 9, the maximum (horizontal) displacement of the seismic isolation device 1 is the lower sliding plate 7 and the upper sliding plate 11. Therefore, a large displacement can be obtained with a small device.

以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

例えば、図１１（ａ）に示す実施形態である免震装置６０のように、免震装置１の上下の摺動プレートに代えて、下摺動プレート６１および上摺動プレート６３を用いてもよい。下摺動プレート６１は、摺動部材９との摺動範囲の外周部に上方に向けた突起であるストッパ６５を有する。また、上摺動プレート６３は、摺動部材９との摺動範囲の外周部に下方に向けた突起であるストッパ６７を有する。この場合、地震等の揺れに対して、摺動部材９がストッパ６３、６５を超えて摺動することがない。したがって摺動部材９が上下の各摺動プレートの摺動範囲を超えて飛び出すことがない。すなわち、下摺動プレート６１側と上摺動プレート６３側の相対的な変位量を規制することができる。   For example, a lower sliding plate 61 and an upper sliding plate 63 may be used instead of the upper and lower sliding plates of the seismic isolation device 1 as in the seismic isolation device 60 that is the embodiment shown in FIG. Good. The lower sliding plate 61 has a stopper 65 which is a projection directed upward on the outer peripheral portion of the sliding range with the sliding member 9. Further, the upper sliding plate 63 has a stopper 67 which is a projection directed downward on the outer peripheral portion of the sliding range with the sliding member 9. In this case, the sliding member 9 does not slide beyond the stoppers 63 and 65 against shaking such as an earthquake. Therefore, the sliding member 9 does not jump out beyond the sliding range of the upper and lower sliding plates. That is, the relative displacement amount between the lower sliding plate 61 side and the upper sliding plate 63 side can be regulated.

また、図１１（ｂ）に示す免震装置７０のように、上下の摺動プレートの内、一方のみを曲面として他方の摺動面を平坦面としてもよい。なお、平坦な面を有する側の取付プレート（図１１（ｂ）では上取付プレート７３）には、上摺動プレート７１の取り付け用の孔１４（図１）は必要ない。また、上摺動プレート７１が平坦な面である場合には、摺動部材９の上面も、上摺動プレート７１の摺動面に対応して曲面ではなく平坦面となる。   Further, as in the seismic isolation device 70 shown in FIG. 11B, only one of the upper and lower sliding plates may be a curved surface and the other sliding surface may be a flat surface. The mounting plate 14 (FIG. 1) for mounting the upper sliding plate 71 is not required in the mounting plate having the flat surface (the upper mounting plate 73 in FIG. 11B). When the upper sliding plate 71 is a flat surface, the upper surface of the sliding member 9 is not a curved surface but a flat surface corresponding to the sliding surface of the upper sliding plate 71.

また、下フレーム３、下取付プレート５、下摺動プレート７の一部または全部が一体で成形されてもよく、別体で形成されてもよい。すなわち、下フレーム、下取付プレート、下摺動プレートの機能を有する下部支持構造体を用いれば、それら各部が別体であっても一体であってもよい。同様に、上摺動プレート１１、上取付プレート１３、上フレーム１５、上プレート１７の一部または全部が一体で成形されてもよく、上摺動プレート、上取付プレート、上フレーム、上プレートの機能を有する上部支持構造体を用いれば、それら各部が別体であっても一体であってもよい。たとえば、下取付プレート５と下摺動プレート７とが一体で形成され、また、上摺動プレート１１と上取付プレート１３とが一体で形成されてもよい。   Moreover, a part or all of the lower frame 3, the lower mounting plate 5, and the lower sliding plate 7 may be integrally formed, or may be formed separately. That is, if a lower support structure having functions of a lower frame, a lower mounting plate, and a lower sliding plate is used, these parts may be separate or integrated. Similarly, a part or all of the upper sliding plate 11, the upper mounting plate 13, the upper frame 15, and the upper plate 17 may be integrally formed. The upper sliding plate, the upper mounting plate, the upper frame, and the upper plate If an upper support structure having a function is used, these parts may be separate or integrated. For example, the lower mounting plate 5 and the lower sliding plate 7 may be integrally formed, and the upper sliding plate 11 and the upper mounting plate 13 may be integrally formed.

また、実施例においては免震装置１を縦横２列ずつ計４台連結して用いたが、免震装置をさらに追加して連結してもよい。この場合、例えば横方向（図１０の左右方向）へ免震装置を追加する場合には、連結側の連結部１８に、塞ぎ部材５１に代えて連結部材５３を設置すれば良い。また、縦方向（図１０の上下方向）へ免震装置を追加する場合には、例えば連結部１８を上プレート１７の短辺側全長に設けておき、２以上の免震装置を一本の連結部材５３により連結してもよい。この場合、塞ぎ部材５１も上プレート１７の短辺側全長にわたって配置されればよい。   Further, in the embodiment, the seismic isolation device 1 is used by connecting a total of four units in two rows and two columns, but a seismic isolation device may be additionally connected. In this case, for example, when the seismic isolation device is added in the lateral direction (left and right direction in FIG. 10), a connecting member 53 may be installed in the connecting portion 18 on the connecting side instead of the closing member 51. Further, when adding a seismic isolation device in the vertical direction (vertical direction in FIG. 10), for example, the connecting portion 18 is provided on the entire short side of the upper plate 17, and two or more seismic isolation devices are provided. You may connect by the connection member 53. FIG. In this case, the closing member 51 only needs to be disposed over the entire short side of the upper plate 17.

１、６０、７０………免震装置
３………下フレーム
５………下取付プレート
６………孔
７、６１………下摺動プレート
９………摺動部材
１１、６３、７１………上摺動プレート
１３、７３………上取付プレート
１４………孔
１５………上フレーム
１７………上プレート
１８………連結部
１９………支持脚
２１、２３………凹曲面
２５、２７………凸曲面
２９………フロアパネル
３１………総地設置部
３３、３５………受け部材
３６………固定金具
３７………連結部材
３８………押さえ板
３９………受け部材接合部
４１………本体
４２………切り欠き部
４３………支持脚保持部
４５………Ｕボルト
４７………軸
４９………ナット
５１………塞ぎ部材
５３………連結部材
６５、６７………ストッパ 1, 60, 70 ......... Seismic isolation device 3 ......... Lower frame 5 ......... Lower mounting plate 6 ......... Hole 7, 61 ......... Lower sliding plate 9 ......... Sliding members 11, 63, 71 ......... Upper sliding plate 13, 73 ......... Upper mounting plate 14 ......... Hole 15 ......... Upper frame 17 ......... Upper plate 18 ......... Connecting part 19 ......... Support legs 21, 23 ... ...... Concave curved surface 25, 27 ......... Convex curved surface 29 ......... Floor panel 31 ......... Total ground installation part 33, 35 ......... Receiving member 36 ......... Fixing bracket 37 ......... Connecting member 38 ......... Holding plate 39 ......... Receiving member joint portion 41 ......... Main body 42 ......... Notch portion 43 ......... Support leg holding portion 45 ......... U bolt 47 ......... Shaft 49 ... …… Nut 51 ......... Blocking member 53 ......... Connecting member 65, 67 ......... Stopper

Claims (7)

フリーアクセスフロアに使用される免震構造であって、
支持脚に設置される受け部材と、
前記受け部材上に固定され、上方に摺動面を有し、上方からの重量を支持可能な下部支持構造体と、
前記下部支持構造上に配置される摺動部材と、
前記摺動部材上に配置され、下方に摺動面を有し、上方からの重量を支持可能な上部支持構造体と、
を具備する免震装置が、水平方向に複数隣接して配置され、
隣接する前記免震装置の前記上部支持構造体同士が、第１の連結部材で連結され、
前記第１の連結部材による連結方向とは垂直方向に隣接する前記免震装置の前記上部支持構造体同士が、第２の連結部材で連結されることを特徴とする免震構造。 Seismic isolation structure used for free access floors,
A receiving member installed on the support leg;
A lower support structure fixed on the receiving member, having a sliding surface above and capable of supporting the weight from above;
A sliding member disposed on the lower support structure;
An upper support structure disposed on the sliding member, having a sliding surface below and capable of supporting the weight from above;
A plurality of seismic isolation devices are arranged adjacent to each other in the horizontal direction,
The upper support structures of adjacent seismic isolation devices are connected by a first connecting member,
The base isolation structure, wherein the upper support structures of the base isolation device adjacent to each other in a direction perpendicular to the connection direction by the first connection member are connected by a second connection member. 前記下部支持構造体は、
支持脚上に設置され、固定される下フレームと、
前記下フレーム上に固定される下取付プレートと、
前記下取付プレート上に固定され、摺動面を有する下摺動プレートと、
を有し、
前記下フレーム、前記下取付プレートおよび前記下摺動プレートの一部または全部が一体または別体で形成されることを特徴とする請求項１記載の免震装置。 The lower support structure is
A lower frame installed and fixed on a support leg;
A lower mounting plate fixed on the lower frame;
A lower sliding plate fixed on the lower mounting plate and having a sliding surface;
Have
The seismic isolation device according to claim 1, wherein a part or all of the lower frame, the lower mounting plate, and the lower sliding plate are integrally or separately formed. 前記上部支持構造体は、
前記摺動部材上に配置され、摺動面を有する上摺動プレートと、
前記上摺動プレート上に固定される上取付プレートと、
前記上取付プレート上に固定される上フレームと、
前記上フレーム上に固定される上プレートと、
を有し、
前記上摺動プレート、前記上取付プレート、前記上フレームおよび前記上プレートの一部または全部が一体または別体で形成されることを特徴とする請求項１または請求項２記載の免震装置。 The upper support structure is
An upper sliding plate disposed on the sliding member and having a sliding surface;
An upper mounting plate fixed on the upper sliding plate;
An upper frame fixed on the upper mounting plate;
An upper plate fixed on the upper frame;
Have
The seismic isolation device according to claim 1 or 2, wherein a part or all of the upper sliding plate, the upper mounting plate, the upper frame, and the upper plate are integrally or separately formed. 前記免震装置における前記受け部材下端から前記上部支持構造体下端までの厚さが、隣接して設置されているフロアパネルの厚さよりも厚いことを特徴とする請求項１から請求項３のいずれかに記載の免震構造。   The thickness from the said receiving member lower end in the said seismic isolation apparatus to the said upper support structure lower end is thicker than the thickness of the floor panel installed adjacently, Any one of Claim 1 to 3 characterized by the above-mentioned. The seismic isolation structure described in Crab. 前記免震装置が少なくとも縦横２個ずつ隣り合うように設置されることを特徴とする請求項１から請求項４のいずれかにに記載の免震構造。   The seismic isolation structure according to any one of claims 1 to 4, wherein the seismic isolation devices are installed so that at least two seismic isolation devices are adjacent to each other. フリーアクセスフロアに使用される免震構造の構築方法であって、
免震構造の設置範囲の隣り合う複数のフロアパネルを撤去し、
支持脚上に固定金具によって受け部材を設置し、
前記受け部材上に、上方に摺動面を有し、上方からの重量を支持可能な下部支持構造体を設置し、
前記下部支持構造体の摺動面上に摺動部材を配置し、
前記摺動部材上に、下方に摺動面を有し、上方からの重量を支持可能な上部支持構造体を配置し、
隣接して配置されている他の免震装置の上部支持構造体同士を第１の連結部材で連結し、
前記第１の連結部材による連結方向とは垂直方向に隣接する他の免震装置の上部支持構造体を、第２の連結部材で連結することを特徴とする免震構造の構築方法。 A method of constructing a seismic isolation structure used for a free access floor,
Remove several adjacent floor panels in the seismic isolation structure installation range,
Install the receiving member with the fixing bracket on the support leg,
On the receiving member, a lower support structure having a sliding surface above and capable of supporting the weight from above is installed,
A sliding member is disposed on the sliding surface of the lower support structure;
On the sliding member, an upper support structure having a sliding surface below and capable of supporting the weight from above is disposed,
Connecting the upper support structures of other seismic isolation devices arranged adjacent to each other with the first connecting member,
A method for constructing a seismic isolation structure, wherein an upper support structure of another seismic isolation device adjacent in a direction perpendicular to the coupling direction by the first coupling member is coupled by a second coupling member. 前記下部支持構造体は、
前記受け部材上に下フレームを設置し、
前記下フレーム上に下取付プレートを固定し、
前記下取付プレート上に下摺動プレートを固定して構築され、
前記上部支持構造体は、
前記摺動部材上に上摺動プレートおよび上取付プレートが接合された上フレームおよび上プレートを配置して構築され、
前記第１の連結部材で隣接する前記上フレーム同士を連結し、
前記第２の連結部材で隣接する前記上プレート同士を連結することを特徴とする請求項６記載の免震構造の構築方法。 The lower support structure is
Installing a lower frame on the receiving member;
Fixing a lower mounting plate on the lower frame;
It is constructed by fixing a lower sliding plate on the lower mounting plate,
The upper support structure is
An upper frame and an upper plate in which an upper sliding plate and an upper mounting plate are joined to each other are arranged on the sliding member.
Connecting the upper frames adjacent to each other with the first connecting member;
The said upper plate which adjoins by the said 2nd connection member is connected, The construction method of the seismic isolation structure of Claim 6 characterized by the above-mentioned.
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JP5697775B1 (en) * 2014-02-25 2015-04-08 ヤクモ株式会社 Seismic isolation floor
JP2020148260A (en) * 2019-03-13 2020-09-17 日本ピラー工業株式会社 Movable support device
JP7109136B1 (en) 2021-10-29 2022-07-29 株式会社金澤製作所 Guide member for seismic isolation unit and seismic isolation unit

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Publication number Priority date Publication date Assignee Title
JP2004360797A (en) * 2003-06-05 2004-12-24 Oiles Ind Co Ltd Base-isolated structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004360797A (en) * 2003-06-05 2004-12-24 Oiles Ind Co Ltd Base-isolated structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5697775B1 (en) * 2014-02-25 2015-04-08 ヤクモ株式会社 Seismic isolation floor
JP2020148260A (en) * 2019-03-13 2020-09-17 日本ピラー工業株式会社 Movable support device
JP7177732B2 (en) 2019-03-13 2022-11-24 日本ピラー工業株式会社 movable bearing
JP7109136B1 (en) 2021-10-29 2022-07-29 株式会社金澤製作所 Guide member for seismic isolation unit and seismic isolation unit
JP2023067717A (en) * 2021-10-29 2023-05-16 株式会社金澤製作所 Guide member for base isolation unit and base isolation unit

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