JP4004167B2

JP4004167B2 - Structure of refractory coating materials in seismic isolation devices

Info

Publication number: JP4004167B2
Application number: JP00015699A
Authority: JP
Inventors: 正見大串
Original assignee: Yokohama Rubber Co Ltd
Current assignee: Yokohama Rubber Co Ltd
Priority date: 1999-01-04
Filing date: 1999-01-04
Publication date: 2007-11-07
Anticipated expiration: 2019-01-04
Also published as: JP2000199290A

Description

【０００１】
【発明の属する技術分野】
この発明は、免震装置に於ける耐火被覆材の構造に係わり、更に詳しくは免震装置の剪断変形に追従可能で、かつ追従後も耐火シール性に優れ、有効な耐火性を有する免震装置に於ける耐火被覆材の構造に関するものである。
【０００２】
【従来の技術】
近年、鋼板とゴムシートとを交互に積層させて構成して成る積層ゴム製の免震装置においては、構造物の火災時に免震性能を維持させるために、免震装置の周囲を耐火被覆材で覆うことが行われている。
【０００３】
この場合、耐火被覆材は火災により免震装置に影響がないように耐火性能を保持していることは勿論の事、地震時の免震装置の剪断変形に追従し得るように構成したり取付ける必要がある。
【０００４】
ところで、従来の免震装置における耐火被覆材は、セラミックブランケット等の不燃断熱材にて免震装置の剪断変形に追従するように外側または内側に折り曲げた蛇腹構造に構成していた。
【０００５】
また、例えば、特公平７−７４５１６号（発明の名称：免震装置の耐火被覆構造）の図８に記載されているように、耐火被覆材の上端のみみ部を上部構造物に接合し、下端部を折曲げて下部構造体に当接する構造であった。
また耐火被覆材の構成は、セラミックブランケットを断熱材とし、表面をセラミッククロスで覆う構成であった。
【０００６】
【発明が解決しようとする課題】
然しながら、前者のセラミックブランケット等の耐火被覆材を使用する構造は、耐火被覆材が伸びないため免震装置の剪断変形に追従するように、外層に凸状にしたり、中に折り込む構造にして上下柱を大きくする必要があった。
【０００７】
また、後者の耐火被覆材の上部のみを構造物に接合し、下部は折り曲げて下部構造物に当接した構造のものは、免震装置の追従時に耐火被覆と下部構造物間に隙間が生じてシール性が劣り、耐火性に劣ると言う問題があった。
更に、高価なセラミッククロスで表面を覆うので高額となり、普及が進まない一因であった。
【０００８】
この発明の目的は、免震装置の剪断変形に追従可能であると共に、追従後にも耐火シール性に優れ、有効な耐火性を有すると共に、低安価な免震装置に於ける耐火被覆材の構造を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するこの発明の免震装置に於ける耐火被覆材の構造は、下部構造物と上部構造物との間に設置される積層ゴムから成る免震装置の周囲を前記積層ゴムから所定の間隔を隔ててシート状の耐火被覆材で覆うように構成して成る免震装置に於ける耐火被覆材の構造において、前記耐火被覆材は、耐炎化クロスにより覆ったセラミックブランケットから成るシート状の外層耐火被覆材と、該外層耐火被覆材の内側に外層耐火被覆材と当接して配置され、耐炎化クロスにより覆ったセラミックブランケットから成る内層耐火被覆材とから成る二重構造に構成され、前記外層耐火被覆材の上端部のみを上部構造物に気密的に取付け、前記内層耐火被覆材の下端部のみを下部構造物に気密的に取付けたことを要旨とするものである。
また、この発明の他の免震装置に於ける耐火被覆材の構造は、積層ゴムの上下両側に該積層ゴムより横方向に突出する上部フランジと下部フランジを設けて構成される免震装置の周囲を前記積層ゴムから所定の間隔を隔ててシート状の耐火被覆材で覆うように構成して成る免震装置に於ける耐火被覆材の構造において、前記耐火被覆材は、耐炎化クロスにより覆ったセラミックブランケットから成るシート状の外層耐火被覆材と、該外層耐火被覆材の内側に外層耐火被覆材と当接して配置され、耐炎化クロスにより覆ったセラミックブランケットから成る内層耐火被覆材とから成る二重構造に構成され、前記外層耐火被覆材の上端部のみを上部フランジに気密的に取付け、前記内層耐火被覆材の下端部のみを下部フランジに気密的に取付けたことを要旨とするものである。
【００１０】
この発明は、上記のように構成され、外層耐火被覆材の上端部のみを上部構造物または免震装置の上部フランジに気密的に取付け、外層耐火被覆材の下端部と下部構造物または免震装置の下部フランジとの間に内層耐火被覆材を介在させたので、免震装置の剪断変形に追従可能であり、また外層耐火被覆材の下端部が自由端となっていても下部構造物や下部フランジとの間には内層耐火被覆材を介在させてあるので追従後にも耐火シール性に優れ、有効な耐火性を有するものである。即ち、耐火被覆材は一端側のみが固定され、他端側は固定されずに自由になっているので、地震時の免震装置の剪断変形に追従して変形し、免震装置の剪断変形を妨げることがない。地震後に免震装置が地震前の状態（剪断変形していない状態）に戻ると、外層耐火被覆材と内層耐火被覆材も元の当接する二重構造の状態に戻るので、有効な耐火シール性を発揮する。
【００１１】
また、安価な耐炎化クロスを使用したので、安価な耐火被覆材を提供出来るものである。
【００１２】
【発明の実施の形態】
以下、添付図面に基づき、この発明の実施形態を説明する。
図１は、この発明の第１実施形態を示す耐火被覆材の取付け状態を示す概略構成図を示し、１は図示しない鋼板とゴムシートとを交互に積層させて構成して成る積層ゴム製の免震装置、２ａ，２ｂは免震装置の上部フランジと下部フランジ、３は免震装置１を設置する下部構造物、４は免震装置１上に設置する上部構造物を示している。
【００１３】
前記免震装置１の外周囲には、積層ゴムから所定の間隔（空間）５を隔ててシート状の耐火被覆材（外層耐火被覆材）６で覆うように構成してあり、この耐火被覆材６は、図２及び図３に示すように、最外層を耐炎化クロス（ガラス繊維等で構成された布）７により覆ったセラミックブランケット（セラミック製の綿）８により構成してある。
【００１４】
前記耐火被覆材６は、その上端部のみを上部構造物４の側面にボルト等の取付け部材９を介して気密的に取付けてある。耐火被覆材６の内側にはシート状の内層耐火被覆材１０が耐火被覆材６に当接するように配置され、耐火被覆材６，１０からなる二重構造になっている。耐火被覆材６，１０の下端部間と耐火被覆材６の下端面には発泡耐火材１１を配置している。図示する例では、耐火被覆材６は下部構造物３まで延在し、内層耐火被覆材１０は上部構造物から離間する位置まで延在し、耐火被覆材６，１０は部分的に二重構造に構成されている。
【００１５】
前記内層耐火被覆材１０としては、上記の耐火被覆材６と略同様の構成で、セラミックブランケット（セラミック製の綿）の外周を耐炎化クロスで覆うように構成してあり、この内層耐火被覆材１０の下端部は、下部構造物４にボルト等の取付け部材９を介して気密的に取付けてある。
【００１６】
また、発泡耐火材１１としては、古河電気工業（株）製及び（株）古河テクノマテリアル製の商品名：『ダンシール−Ｄ』を使用し、この『ダンシール−Ｄ』は、主要構成材料として、有機質バインダー，無機充填材，無機発泡材で構成されたもので、可撓性に富み、簡単に切断加工ができるようにシート状に形成され、厚さとしては、３mm，７mm，１０mm等の種類があり、使用用途や条件により選択して使用出来るものである。
【００１７】
また、前記耐火被覆材６は、図２に示すように少なくとも取付け部１３の部分を帯状のセラミッククロス等の耐火補強材１４を重ねて補強することも可能であり、更に内層耐火被覆材１０の上端部と上部構造物４とをスプリングまたはゴム等の弾性部材１５により連結している。また、前記耐火被覆材６の上部取付け部１３及び取付け部材９の頭部９ａに耐火発泡ゴム１６を取付け、耐火被覆材６の外面に露出する取付け部材９の頭部９ａを耐火発泡ゴム１６で被覆して火災の熱により損傷を防止するようにしている。
【００１８】
図４は、この発明の第２実施形態を示すもので、この実施形態は、耐火被覆材６，１０を、上部構造物と下部構造物に代えて、免震装置１の積層ゴムの上下両側の、積層ゴムより横方向に突出する上部フランジ２ａと下部フランジ２ｂに取付けたものある。
【００１９】
内層耐火被覆材１０、耐火補強材１４、弾性部材１５、取付け部材９の頭部９ａを被覆する耐火発泡ゴム１６など、上部フランジ２ａと下部フランジ２ｂに取付ける以外の構成及び作用は、上記第１実施形態と同様なので、同一符号を付して説明は省略する。なお、弾性部材１５は、上部フランジ２ａと内層耐火被覆材１０の上端部とを連結している。
【００２１】
【発明の効果】
この発明は上記のように、耐火被覆材は、耐炎化クロスにより覆ったセラミックブランケットから成るシート状の外層耐火被覆材と、該外層耐火被覆材の内側に外層耐火被覆材と当接して配置され、耐炎化クロスにより覆ったセラミックブランケットから成る内層耐火被覆材とから成る二重構造に構成され、外層耐火被覆材の上端部のみを上部構造物または上部フランジに気密的に取付け、内層耐火被覆材の下端部のみを下部構造物または下部フランジに気密的に取付けたため、以下のような優れた効果を奏するものである。
即ち、耐火被覆材は一端側のみが固定され、他端側は固定されずに自由になっているので、地震時の免震装置の剪断変形に追従して変形し、免震装置の剪断変形を妨げることがない。地震後に免震装置が地震前の状態（剪断変形していない状態）に戻ると、外層耐火被覆材と内層耐火被覆材も元の当接する二重構造の状態に戻るので、有効な耐火シール性を発揮する。また、安価な耐炎化クロスを使用するので、安価に製作出来る。
【図面の簡単な説明】
【図１】この発明の第１実施形態における耐火被覆材の取付け状態を示す概略構成図である。
【図２】耐火被覆材の展開した状態を示す正面図である。
【図３】図２のＡーＡ矢視断面図である。
【図４】この発明の第２実施形態における耐火被覆材の取付け状態を示す概略構成図である。
【符号の説明】
１免震装置
２ａ上部フランジ
２ｂ下部フランジ
３下部構造物
４上部構造物
５間隔（空間）
６耐火被覆材（外層耐火被覆材）
７耐炎化クロス
８セラミックブランケット
９取付け部材
９ａ取付け部材の頭部
１０内層耐火被覆材
１１発泡耐火材
１３取付け部
１４耐火補強材
１５弾性部材
１６耐火発泡ゴム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a fireproof coating material in a seismic isolation device, and more specifically, it can follow the shear deformation of the seismic isolation device, and has excellent fireproof sealability even after tracking, and has an effective fireproof property. It relates to the structure of the fireproof coating material in the apparatus.
[0002]
[Prior art]
In recent years, in laminated rubber-made seismic isolation devices composed of alternately laminated steel sheets and rubber sheets, fireproof coatings have been installed around the seismic isolation devices in order to maintain seismic isolation performance in the event of a structural fire. It is done to cover with.
[0003]
In this case, the fireproof covering material is constructed and mounted so that it can follow the shear deformation of the seismic isolation device during an earthquake as well as maintaining the fireproof performance so that the seismic isolation device is not affected by a fire. There is a need.
[0004]
By the way, the fireproof covering material in the conventional seismic isolation device has a bellows structure that is bent outward or inward so as to follow the shear deformation of the seismic isolation device with a non-combustible heat insulating material such as a ceramic blanket.
[0005]
Further, for example, as shown in FIG. 8 of Japanese Patent Publication No. 7-74516 (name of invention: fireproof covering structure of seismic isolation device), the upper notch portion of the fireproof covering material is joined to the upper structure, The lower end portion was bent and contacted with the lower structure.
Moreover, the fireproof coating material was configured to use a ceramic blanket as a heat insulating material and cover the surface with a ceramic cloth.
[0006]
[Problems to be solved by the invention]
However, the structure that uses the fireproofing material such as former ceramic blanket, so as to follow the shear deformation of the seismic isolation device for fireproofing material does not stretch, or convex to the outer layer, in the folded structure in It was necessary to enlarge the upper and lower pillars.
[0007]
In the case of the structure in which only the upper part of the latter fireproof coating material is joined to the structure and the lower part is bent and in contact with the lower structure, a gap is created between the fireproof coating and the lower structure when the seismic isolation device follows. Therefore, there was a problem that the sealing performance was poor and the fire resistance was poor.
Furthermore, since the surface is covered with an expensive ceramic cloth, the cost is high, which is one of the reasons why the spread is not promoted.
[0008]
The object of the present invention is to follow the shear deformation of the seismic isolation device, and also has excellent fireproof sealing properties after the follow-up, effective fire resistance, and structure of the fireproof coating material in the inexpensive seismic isolation device Is to provide.
[0009]
[Means for Solving the Problems]
The structure of the fireproof covering material in the seismic isolation device of the present invention that achieves the above object is that the periphery of the seismic isolation device composed of laminated rubber installed between the lower structure and the upper structure is predetermined from the laminated rubber. In the structure of a fireproof coating material in a seismic isolation device configured to be covered with a sheet-like fireproof coating material with an interval of, the fireproof coating material is a sheet-like material made of a ceramic blanket covered with a flameproof cloth. The outer layer fire-resistant coating material, and the inner layer fire-resistant coating material is arranged in contact with the outer-layer fire-resistant coating material and is arranged in contact with the outer-layer fire-resistant coating material, and is composed of an inner-layer fire-resistant coating material made of a ceramic blanket covered with a flameproof cloth The gist is that only the upper end portion of the outer layer fireproof coating material is hermetically attached to the upper structure, and only the lower end portion of the inner layer fireproof coating material is hermetically attached to the lower structure .
Further, the structure of the fireproof covering material in another seismic isolation device of the present invention is that of the seismic isolation device configured by providing upper and lower flanges projecting laterally from the laminated rubber on both upper and lower sides of the laminated rubber. In the structure of the fireproof coating material in the seismic isolation device configured to cover the periphery with the sheet-shaped fireproof coating material at a predetermined interval from the laminated rubber, the fireproof coating material is covered with a flameproof cloth. A sheet-like outer layer fire-resistant coating material made of a ceramic blanket, and an inner-layer fire-resistant coating material made of a ceramic blanket disposed in contact with the outer layer fire-resistant coating material and in contact with the outer layer fire-resistant coating material and covered with a flame-resistant cloth Constructed in a double structure, only the upper end portion of the outer layer fireproof coating material is hermetically attached to the upper flange, and only the lower end portion of the inner layer fireproof coating material is hermetically attached to the lower flange. It is an gist and.
[0010]
This invention is constructed as described above, mounted hermetically only the upper end portion of the outer layer refractory coating material to the upper flange of the upper structure or isolator, the outer layer refractory coating material a lower end portion and the lower structure or seismic isolation Since the inner layer fireproof coating material is interposed between the lower flange of the device, it can follow the shear deformation of the seismic isolation device, and even if the lower end of the outer layer fireproof coating material is a free end, Since an inner layer fireproof covering material is interposed between the lower flange and the bottom flange, the fireproof sealability is excellent even after the follow-up, and the fireproof material is effective. In other words, since the fireproof covering material is fixed only at one end and is free without being fixed at the other end, it deforms following the shear deformation of the seismic isolation device during an earthquake, and the shear deformation of the seismic isolation device Will not be disturbed. When the seismic isolation device returns to the pre-earthquake state (no shear deformation) after the earthquake, the outer and inner layer fireproof coating materials also return to the original double-contacted state, so effective fireproof sealability Demonstrate.
[0011]
Further, since an inexpensive flameproof cloth is used, an inexpensive fireproof coating material can be provided.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic configuration diagram showing a mounting state of a fireproof coating material according to a first embodiment of the present invention, and 1 is a laminated rubber made by alternately laminating steel plates and rubber sheets (not shown). The seismic isolation devices, 2a and 2b, upper and lower flanges of the seismic isolation device, 3 indicates the lower structure where the seismic isolation device 1 is installed, and 4 indicates the upper structure installed on the seismic isolation device 1.
[0013]
The outer periphery of the seismic isolation device 1 is configured to be covered with a sheet-like fireproof covering material (outer layer fireproof covering material) 6 with a predetermined space (space) 5 from the laminated rubber , and this fireproof covering material 2 and 3, the outermost layer 6 is constituted by a ceramic blanket (ceramic cotton) 8 whose outermost layer is covered with a flameproof cloth (cloth made of glass fiber or the like) 7 .
[0014]
The refractory coating material 6, Oh Ru attached airtightly through the mounting member 9 such as a bolt only the upper end side of the upper structure 4. A sheet-like inner layer fireproof coating material 10 is disposed inside the fireproof coating material 6 so as to contact the fireproof coating material 6, and has a double structure composed of the fireproof coating materials 6 and 10. A foamed refractory material 11 is disposed between the lower end portions of the refractory coating materials 6 and 10 and the lower end surface of the refractory coating material 6. In the illustrated example, the fireproof covering 6 extends to the lower structure 3, the inner fireproof covering 10 extends to a position away from the upper structure, and the fireproof coverings 6, 10 are partially double structures. It is configured.
[0015]
The inner layer fireproof covering material 10 is configured to cover the outer periphery of a ceramic blanket (ceramic cotton) with a flameproof cloth in substantially the same configuration as the fireproof covering material 6 described above. The lower end of 10 is airtightly attached to the lower structure 4 via an attachment member 9 such as a bolt.
[0016]
In addition, as the foam refractory material 11, the product name “Dan Seal-D” manufactured by Furukawa Electric Co., Ltd. and Furukawa Techno Material Co., Ltd. is used. It is composed of organic binder, inorganic filler, and inorganic foam material. It is flexible and is formed into a sheet shape that can be easily cut. Thickness of 3mm, 7mm, 10mm, etc. And can be selected and used according to the intended use and conditions.
[0017]
Further, the refractory coating material 6 is also possible to reinforce overlapping refractory reinforcement 14 such as a strip of ceramic cloth the parts of the at least the mounting portion 13 as shown in FIG. 2, further inner refractory dressing 10 and an end portion and the upper structure 4 is connected by the elastic member 15 of the spring or rubber over the. The mounting refractory foam rubber 16 to the head 9a of the upper mounting portion 13 and the mounting member 9 of the refractory coating material 6, the head 9a of the mounting member 9 which is exposed on the outer surface of the refractory coating material 6 with a refractory foam rubber 16 It is covered to prevent damage from the heat of the fire.
[0018]
FIG. 4 shows a second embodiment of the present invention. In this embodiment, the fireproof covering materials 6 and 10 are replaced with an upper structure and a lower structure, and both upper and lower sides of the laminated rubber of the seismic isolation device 1 are shown. These are attached to the upper flange 2a and the lower flange 2b that protrude laterally from the laminated rubber.
[0019]
The structure and operation other than the attachment to the upper flange 2a and the lower flange 2b, such as the inner layer fireproof covering material 10, the fireproof reinforcing material 14, the elastic member 15, and the fireproof foam rubber 16 covering the head portion 9a of the attachment member 9, are as described above. Since it is the same as that of embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. The elastic member 15 connects the upper flange 2a and the upper end portion of the inner layer fireproof covering material 10.
[0021]
【The invention's effect】
In the present invention, as described above, the fire-resistant coating material is disposed in contact with the outer-layer fire-resistant coating material on the inner side of the outer-layer fire- resistant coating material, which is made of a ceramic blanket covered with a flame-resistant cloth. It is composed of a double layer structure consisting of an inner layer fireproof coating made of a ceramic blanket covered with a flameproof cloth, and only the upper end of the outer layer fireproof coating is hermetically attached to the upper structure or upper flange, and the inner layer fireproof coating Since only the lower end of the airtightly attached to the lower structure or the lower flange , the following excellent effects are achieved.
In other words, since the fireproof covering material is fixed only at one end and is free without being fixed at the other end, it deforms following the shear deformation of the seismic isolation device during an earthquake, and the shear deformation of the seismic isolation device Will not be disturbed. When the seismic isolation device returns to the pre-earthquake state (no shear deformation) after the earthquake, the outer and inner layer fireproof coating materials also return to the original double-contacted state, so effective fireproof sealability Demonstrate. Moreover, since an inexpensive flameproof cloth is used, it can be manufactured at low cost.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an attached state of a fireproof coating material according to a first embodiment of the present invention.
FIG. 2 is a front view showing a developed state of the fireproof covering material.
3 is a cross-sectional view taken along arrow AA in FIG. 2;
FIG. 4 is a schematic configuration diagram showing an attached state of a fireproof coating material according to a second embodiment of the present invention.
[Explanation of symbols]
1 Seismic isolation device 2a Upper flange 2b Lower flange 3 Lower structure 4 Upper structure 5 Spacing (space)
6 Fireproof coating (outer layer fireproof coating)
DESCRIPTION OF SYMBOLS 7 Flame-resistant cloth 8 Ceramic blanket 9 Attachment member 9a Head of attachment member 10 Inner layer fireproof covering material 11 Foam fireproof material 13 Attachment part 14 Fireproof reinforcement material 15 Elastic member 16 Fireproof foam rubber

Claims

下部構造物と上部構造物との間に設置される積層ゴムから成る免震装置の周囲を前記積層ゴムから所定の間隔を隔ててシート状の耐火被覆材で覆うように構成して成る免震装置に於ける耐火被覆材の構造において、前記耐火被覆材は、耐炎化クロスにより覆ったセラミックブランケットから成るシート状の外層耐火被覆材と、該外層耐火被覆材の内側に外層耐火被覆材と当接して配置され、耐炎化クロスにより覆ったセラミックブランケットから成る内層耐火被覆材とから成る二重構造に構成され、前記外層耐火被覆材の上端部のみを上部構造物に気密的に取付け、前記内層耐火被覆材の下端部のみを下部構造物に気密的に取付けた免震装置に於ける耐火被覆材の構造。 A seismic isolation system configured to cover the periphery of a seismic isolation device made of laminated rubber installed between the lower structure and the upper structure with a sheet-like fireproof covering material at a predetermined interval from the laminated rubber. In the structure of the fireproof coating material in the apparatus, the fireproof coating material includes a sheet-like outer layer fireproof coating material made of a ceramic blanket covered with a flameproofing cloth, and an outer layer fireproof coating material on the inner side of the outer layer fireproof coating material. Constructed in a double structure consisting of an inner layer fireproof coating made of a ceramic blanket placed in contact with and covered with a flameproof cloth, only the upper end of the outer layer fireproof coating is airtightly attached to the upper structure, the inner layer The structure of the fireproof covering material in the seismic isolation device in which only the lower end of the fireproof covering material is airtightly attached to the lower structure.

前記外層耐火被覆材は下部構造物まで延在し、前記内層耐火被覆材は上部構造物から離間する位置まで延在し、前記耐火被覆材は部分的に二重構造に構成される請求項１に記載の免震装置に於ける耐火被覆材の構造。 2. The outer layer fireproof coating material extends to a lower structure, the inner layer fireproof coating material extends to a position away from the upper structure, and the fireproof coating material is partially configured in a double structure. Structure of fireproof covering material in the seismic isolation device described in 1.

前記内層耐火被覆材の上端部を弾性部材を介して上部構造物に連結した請求項２に記載の免震装置に於ける耐火被覆材の構造。 The structure of the fireproof coating material in the seismic isolation device according to claim 2, wherein an upper end portion of the inner layer fireproof coating material is connected to an upper structure through an elastic member .

前記外層耐火被覆材の取付け部をセラミッククロスからなる耐火補強材で補強した請求項１，２または３に記載の免震装置に於ける耐火被覆材の構造。The structure of the fireproof coating material in the seismic isolation device according to claim 1, wherein the mounting portion of the outer layer fireproof coating material is reinforced with a fireproof reinforcing material made of ceramic cloth .

前記外層耐火被覆材の上端部を取付け部材により上部構造物に取付け、該外層耐火被覆材の外面に露出する取付け部材の頭部を耐火発泡ゴムで被覆した請求項１，２，３または４に記載の免震装置に於ける耐火被覆材の構造。 The upper end portion of the outer layer fireproof covering material is attached to the upper structure by an attachment member, and the head of the attachment member exposed to the outer surface of the outer layer fireproof covering material is covered with fireproof foam rubber. Structure of fireproof covering material in the seismic isolation device described.

積層ゴムの上下両側に該積層ゴムより横方向に突出する上部フランジと下部フランジを設けて構成される免震装置の周囲を前記積層ゴムから所定の間隔を隔ててシート状の耐火被覆材で覆うように構成して成る免震装置に於ける耐火被覆材の構造において、前記耐火被覆材は、耐炎化クロスにより覆ったセラミックブランケットから成るシート状の外層耐火被覆材と、該外層耐火被覆材の内側に外層耐火被覆材と当接して配置され、耐炎化クロスにより覆ったセラミックブランケットから成る内層耐火被覆材とから成る二重構造に構成され、前記外層耐火被覆材の上端部のみを上部フランジに気密的に取付け、前記内層耐火被覆材の下端部のみを下部フランジに気密的に取付けた免震装置に於ける耐火被覆材の構造。Cover the periphery of the seismic isolation device, which is provided with upper and lower flanges protruding laterally from the laminated rubber on the upper and lower sides of the laminated rubber, with a sheet-like fireproof covering material spaced from the laminated rubber by a predetermined distance. In the structure of the fireproof covering material in the seismic isolation device configured as described above, the fireproof covering material includes a sheet-like outer layer fireproof covering material formed of a ceramic blanket covered with a flameproof cloth, and the outer layer fireproof covering material. It has a double structure consisting of an inner layer fireproof covering material made of a ceramic blanket that is placed in contact with the outer layer fireproof covering material and covered with a flameproof cloth, and only the upper end of the outer layer fireproof covering material is the upper flange. The structure of the fireproof covering material in the seismic isolation device, which is airtightly attached and only the lower end portion of the inner layer fireproof covering material is airtightly attached to the lower flange.

前記外層耐火被覆材は下部フランジまで延在し、前記内層耐火被覆材は上部フランジから離間する位置まで延在し、前記耐火被覆材は部分的に二重構造に構成される請求項６に記載の免震装置に於ける耐火被覆材の構造。The outer layer fireproof coating material extends to a lower flange, the inner layer fireproof coating material extends to a position away from the upper flange, and the fireproof coating material is partially configured in a double structure. Structure of fireproof covering material in seismic isolation device.

前記内層耐火被覆材の上端部を弾性部材を介して上部フランジに連結した請求項７に記載の免震装置に於ける耐火被覆材の構造。The structure of the fireproof covering material in the seismic isolation device according to claim 7, wherein the upper end portion of the inner layer fireproof covering material is connected to the upper flange via an elastic member.

前記外層耐火被覆材の取付け部をセラミッククロスからなる耐火補強材で補強した請求項６，７または８に記載の免震装置に於ける耐火被覆材の構造。The structure of a fireproof coating material in a seismic isolation device according to claim 6, 7 or 8, wherein a mounting portion of the outer layer fireproof coating material is reinforced with a fireproof reinforcing material made of ceramic cloth.

前記外層耐火被覆材の上端部を取付け部材により上部フランジに取付け、該外層耐火被覆材の外面に露出する取付け部材の頭部を耐火発泡ゴムで被覆した請求項６，７，８または９に記載の免震装置に於ける耐火被覆材の構造。The upper end portion of the outer layer fireproof coating material is attached to the upper flange by a mounting member, and the head of the mounting member exposed to the outer surface of the outer layer fireproof coating material is coated with fireproof foam rubber. Structure of fireproof covering material in seismic isolation device.