JPH10266400A - Fire resistant covering structure of base-isolated device - Google Patents
Fire resistant covering structure of base-isolated deviceInfo
- Publication number
- JPH10266400A JPH10266400A JP8881997A JP8881997A JPH10266400A JP H10266400 A JPH10266400 A JP H10266400A JP 8881997 A JP8881997 A JP 8881997A JP 8881997 A JP8881997 A JP 8881997A JP H10266400 A JPH10266400 A JP H10266400A
- Authority
- JP
- Japan
- Prior art keywords
- seismic isolation
- isolation device
- fire resistant
- resistant covering
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Building Environments (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、免震建物において
柱等の軸力材に介装された免震装置を囲繞する耐火被覆
構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof structure surrounding a seismic isolation device interposed between axial members such as columns in a seismic isolation building.
【０００２】[0002]
【従来の技術】近年、各種建築物に免震性を付与する要
請の高まりから、建物の基礎部分（軸力材）や特定の階
層の柱（軸力材）の柱頭、中間あるいは柱脚に、積層ゴ
ム等からなる免震装置を介装することにより、地盤から
建物あるいは階層間に伝播しようとする振動を絶縁し
て、建物の躯体に生じる応力や変形を抑制するようにし
た免震工法が多く採用されている。このようにして免震
装置が介装された免震建物においては、当該免震装置が
火災によって損傷を受けると、軸力の支承が損われて躯
体自体の存立を危うくするために、これを耐火材によっ
て被覆することによって耐火性を付与する必要がある。2. Description of the Related Art In recent years, there has been an increasing demand for imparting seismic isolation to various types of buildings, and accordingly, there have been demands for a base portion of a building (axial member), a column head of a specific level (axial member), a middle or a column base. A seismic isolation method in which vibrations that propagate from the ground to the building or between floors are insulated by interposing a seismic isolation device made of rubber, laminated rubber, etc., and the stress and deformation generated in the building frame are suppressed. Are often adopted. In a base-isolated building with a seismic isolation device installed in this way, if the seismic isolation device is damaged by a fire, the bearing of the axial force is impaired and the existence of the frame itself is jeopardized. It is necessary to provide fire resistance by coating with a refractory material.
【０００３】ところで、このような免震装置の耐火被覆
構造としては、それ自体が耐火性を有して免震装置を火
災から守ることができることに加えて、さらに地震時に
発生する上下部間の相対変位にも円滑に追従することが
でき、かつ免震装置がゴムを主体とするものであって経
時的な劣化が避けられないために、定期的に上記免震装
置を点検できるものであることが要求される。そこで、
従来の上記耐火被覆構造として、図６に示すような、柱
１の上下部１ａ、１ｂ間に介装された免震装置２を、断
熱層として機能する所要の空気層Ｓを間に介して、シー
ト状の耐火被覆材３を変形自在となるように幾分弛みを
持たせた状態で囲繞し、その上下端部をそれぞれ柱１の
上下部１ａ、１ｂに固定したものが実用化されている。[0003] By the way, such a fireproof covering structure of the seismic isolation device is not only capable of protecting the seismic isolation device from fire because of its own fire resistance, but also has a structure between the upper and lower parts generated during an earthquake. The seismic isolation device can smoothly follow the relative displacement, and the seismic isolation device is mainly made of rubber, so that the seismic isolation device can be inspected periodically because deterioration over time is inevitable. Is required. Therefore,
As the conventional fireproof covering structure, as shown in FIG. 6, a seismic isolation device 2 interposed between upper and lower portions 1a and 1b of a column 1 is interposed with a required air layer S functioning as a heat insulating layer. A sheet-like refractory covering material 3 is practically used in which it is surrounded with some slack so as to be deformable, and upper and lower ends thereof are fixed to upper and lower portions 1a and 1b of the column 1, respectively. I have.
【０００４】上記構成からなる免震装置２の耐火被覆構
造によれば、図７に示すように、地震時に柱１の上下部
１ａ、１ｂ間に相対変位が生じた場合には、シート状の
耐火被覆材３の変形によってこれに追従することができ
るとともに、図８に示すように、地震を受けた後におい
ても、上記耐火被覆材３が復元することにより、免震装
置２との間に断熱層として機能する一定の空気層Ｓを保
持することができるという利点がある。According to the fireproof covering structure of the seismic isolation device 2 having the above configuration, as shown in FIG. 7, when a relative displacement occurs between the upper and lower portions 1a and 1b of the column 1 during an earthquake, a sheet-like structure is formed. This can be followed by the deformation of the fireproof covering material 3 and, as shown in FIG. There is an advantage that a certain air layer S functioning as a heat insulating layer can be maintained.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の免震装置の耐火被覆構造にあっては、免震装置２を
点検する場合に、その都度耐火被覆材３を全て取り外さ
なければならず、当該作業が極めて大掛かりとなって多
大の手間を要するという問題点があった。加えて、シー
ト状の耐火被覆材３を、変形自在とするために弛みを持
たせて免震装置２の周囲に取付ける必要があるため、特
に外観が人目に晒される中間層免震などに適用した場合
に、意匠上の見栄えが悪いという問題点もあった。However, in the above-mentioned conventional fireproof covering structure of the seismic isolation device, when the seismic isolation device 2 is inspected, the fireproof covering material 3 must be removed every time. There has been a problem that the work is extremely large and requires a great deal of labor. In addition, since the sheet-like refractory covering material 3 needs to be attached to the periphery of the seismic isolation device 2 with a slack so as to be deformable, it is particularly applied to a middle-layer seismic isolation device having an external appearance. In that case, there was also a problem that the appearance of the design was poor.
【０００６】そこで、従来の他の耐火被覆構造として、
図９に示すような、柱１の上下部１ａ、１ｂ間に介装さ
れた免震装置２を、所要の空気層Ｓを間に介して、複数
に分割された円環板状の耐火被覆材５を互いに摺動自在
に上下方向に積層することによって囲繞したものが知ら
れている。このような耐火被覆構造によれば、耐火被覆
材５の外形を柱１の上下部１ａ、１ｂと連続した形状に
整えることができるため、中間層免震などに適用した場
合にも外観に優れ、かつ地震時に生じる上下部１ａ、１
ｂの相対変位に対しては、図１０に示すように、各耐火
被覆材５が水平方向に摺動することにより追従すること
ができるという利点がある。Therefore, as another conventional fireproof coating structure,
As shown in FIG. 9, the seismic isolation device 2 interposed between the upper and lower portions 1a and 1b of the column 1 is divided into a plurality of ring-shaped fireproof coatings with a required air layer S interposed therebetween. It is known that the members 5 are slidably laid on each other so as to be slidable one over the other and surrounded. According to such a fire-resistant coating structure, since the outer shape of the fire-resistant coating material 5 can be adjusted to a shape continuous with the upper and lower portions 1a and 1b of the column 1, the appearance is excellent even when applied to a middle layer seismic isolation or the like. And upper and lower parts 1a, 1 generated during an earthquake
As shown in FIG. 10, there is an advantage that the refractory coating 5 can follow the relative displacement of b by sliding in the horizontal direction.
【０００７】ところが、上記免震装置の耐火被覆構造に
あっては、地震時の相対変位に各耐火被覆材５間の摺動
によって追従する構造であるために、図１１に示すよう
に、地震時に耐火被覆材５同士がずれた状態が、地震後
においてもそのまま残ってしまう。このため、免震装置
２の全周にわたって、耐火被覆材５間に均一かつ所要の
耐火被覆厚（外部と空気層Ｓ間における耐火被覆材５同
士の接触長さ）を保持することができできなくなり、し
かも断熱層として耐火性能に寄与する充分な空気層Ｓが
得られない箇所も多く生じてしまうために、最も出火す
る危険性が非常に高く、よって免震装置２に対する耐火
性の確保が要求される地震後において、想定していた耐
火性能を満足に発揮することができないという問題点が
あった。加えて、地震後に人手によって耐火被覆材５を
再び整列させる必要があるために、かかる作業にも多く
の手間を要するという問題点があった。However, since the fireproof structure of the seismic isolation device follows the relative displacement during the earthquake by sliding between the fireproof materials 5, as shown in FIG. Sometimes, the state in which the refractory coating materials 5 are shifted from each other remains even after the earthquake. For this reason, it is possible to maintain a uniform and required refractory coating thickness (the contact length between the refractory coating materials 5 between the outside and the air layer S) between the refractory coating materials 5 over the entire circumference of the seismic isolation device 2. In addition, there are many places where the air layer S that contributes to the fire resistance performance cannot be obtained as a heat insulating layer, so that the risk of fire is extremely high. Therefore, it is necessary to ensure the fire resistance of the seismic isolation device 2. After the required earthquake, there was a problem that the expected fire resistance performance could not be exhibited satisfactorily. In addition, since it is necessary to manually realign the refractory coating material 5 after the earthquake, there is a problem that such work also requires much labor.
【０００８】本発明は、このような従来の免震装置の耐
火被覆構造が有する課題を有効に解決すべくなされたも
ので、地震時の相対変位に対する追従性に優れるととも
に、地震を受けた後においても、耐火被覆材間に要求さ
れる耐火被覆厚を確実に保持することができて耐火性能
に優れる免震装置の耐火被覆構造を提供することを目的
とするものである。SUMMARY OF THE INVENTION The present invention has been made to effectively solve the problems of the conventional fireproofing structure of a seismic isolation device, and has excellent followability with respect to relative displacement during an earthquake, and has a structure which is capable of being used after an earthquake. It is another object of the present invention to provide a fire-resistant coating structure of a seismic isolation device which can reliably maintain a required thickness of a fire-resistant coating between the fire-resistant coating materials and has excellent fire resistance performance.
【０００９】[0009]
【課題を解決するための手段】請求項１に記載の本発明
に係る免震装置の耐火被覆構造は、軸力材に介装された
免震装置の外周に、空気層を間に介して複数に分割され
た環状の耐火被覆材を互いに摺動自在に上下方向に積層
することによって当該免震装置を囲繞し、かつ上記耐火
被覆材の内周部に、対向する免震装置の外周に向けて突
出するスペーサを設けたことを特徴とするものである。According to a first aspect of the present invention, there is provided a fireproofing structure for a seismic isolation device according to the present invention, wherein an air layer is interposed between an outer periphery of the seismic isolation device and an axial force member. Surrounding the seismic isolation device by laminating a plurality of divided annular fireproof covering materials slidably in the vertical direction, and on the inner peripheral portion of the fireproof covering material and on the outer periphery of the seismic isolator facing the same. It is characterized in that a spacer protruding toward is provided.
【００１０】ここで、請求項２に記載の発明は、請求項
１に記載の耐火被覆材に、開閉自在な点検口を設けたこ
とを特徴とするものであり、さらに請求項３に記載の発
明は、上記耐火被覆材が円環板状に形成され、かつ互い
の摺動面に摩擦力を減じるためのすべり材が介装されて
いることを特徴とするものである。Here, the invention according to claim 2 is characterized in that the fireproof covering material according to claim 1 is provided with an inspection port which can be opened and closed, and further according to claim 3. The invention is characterized in that the refractory covering material is formed in an annular plate shape, and a sliding material for reducing a frictional force is interposed on each sliding surface.
【００１１】請求項１〜３のいずれかに記載の耐火被覆
構造によれば、空気層を間に介して、免震装置の外周を
互いに摺動自在な複数の環状の耐火被覆材によって囲繞
しているので、地震時に生じる軸力材の上下部間の相対
変位に対して、各耐火被覆材が互いに摺動することによ
って追従する。この際に、耐火被覆材の内周部に、対向
する免震装置の外周に向けて突出するスペーサを設けて
いるので、地震後に免震装置が元の状態に復元する際
に、耐火被覆材も上記スペーサを介して免震装置の外周
面に倣って整列されることにより、元の状態に復元する
ために、常に上下方向に隣接する耐火被覆材間の全周に
わたって所要の耐火被覆厚を確保することができ、かつ
耐火被覆材と免震装置との間にもほぼ均一な空気層を保
持することができる。この結果、最も出火する危険性が
高い地震後においても、確実に所望の耐火性能を発揮す
ることができる。また、上記スペーサによって、地震後
においても耐火被覆材間に充分な耐火被覆厚を保持させ
ておくことができるために、従来と比較してその環の幅
寸法を小さく設定して耐火被覆全体の小型化を図った場
合においても、常に充分な耐火性能を得ることが可能に
なる。According to the fire-resistant coating structure according to any one of claims 1 to 3, the outer periphery of the seismic isolation device is surrounded by a plurality of slidable annular fire-resistant coating materials via an air space. Therefore, the refractory coatings follow the relative displacement between the upper and lower portions of the axial force member caused by the earthquake by sliding each other. At this time, since the spacer protruding toward the outer periphery of the opposing seismic isolation device is provided on the inner peripheral portion of the fireproof coating material, when the seismic isolation device is restored to the original state after the earthquake, the fireproof coating material is used. In order to restore the original state by being aligned along the outer peripheral surface of the seismic isolation device via the above spacer, the required fireproof coating thickness is always provided over the entire circumference between the vertically adjacent fireproof coating materials. A substantially uniform air layer can be maintained between the fireproof covering material and the seismic isolation device. As a result, even after an earthquake with the highest risk of fire, desired fire resistance performance can be reliably exhibited. In addition, since the spacer can maintain a sufficient thickness of the refractory coating between the refractory coatings even after the earthquake, the width of the ring is set smaller than that of the related art, and the entire refractory coating is set. Even when the size is reduced, it is possible to always obtain sufficient fire resistance.
【００１２】また、請求項２に記載の発明によれば、互
いに摺動自在な耐火被覆材に、開閉自在な点検口を設け
ているので、当該耐火被覆材の点検口を開いて、これを
周方向に回動させることにより、全ての耐火被覆材を取
り外すことなく、免震装置の全周にわたってその点検を
行なうことができる。この際に、上記耐火被覆材の内周
部に、スペーサを設けているので、このスペーサによっ
て耐火被覆材が免震装置の外周に沿って案内されるため
に、当該耐火被覆材をスムーズに回動させることができ
る。Further, according to the second aspect of the present invention, since the fireproof covering materials that are slidable with each other are provided with the inspection opening that can be opened and closed, the inspection opening of the fireproof covering material is opened, and this is opened. By rotating in the circumferential direction, the inspection can be performed over the entire circumference of the seismic isolation device without removing all the fireproof covering materials. At this time, since the spacer is provided on the inner peripheral portion of the fire-resistant coating material, the spacer guides the fire-resistant coating material along the outer periphery of the seismic isolation device, so that the fire-resistant coating material can be smoothly rotated. Can be moved.
【００１３】さらに、請求項３に記載の発明にあって
は、耐火被覆材の互いの摺動面に摩擦力を減じるための
すべり材を介装しているので、上述した地震時における
追従性が一層向上するとともに、上記スペーサを設けた
効果とあいまって、地震後における復元も一層円滑に行
なわれるために、耐火性能をより確実に保持することが
が可能になる。また、点検時においても、耐火被覆材を
少ない力で回動することができるために、作業が一段と
容易になる。Further, according to the third aspect of the present invention, since the sliding material for reducing the frictional force is interposed between the sliding surfaces of the refractory coating materials, the above-described follow-up property at the time of the above-mentioned earthquake is provided. Is further improved, and in combination with the effect of providing the spacer, restoration after an earthquake is performed more smoothly, so that fire resistance can be more reliably maintained. Also, at the time of inspection, since the refractory coating can be rotated with a small force, the work is further facilitated.
【００１４】[0014]
【発明の実施の形態】図１〜図５は、本発明に係る免震
装置の耐火被覆構造を、角柱（軸力材）に介装された免
震装置回りに適用した一実施形態を示すものである。図
１〜図３において、符号１０が角柱１０であり、この角
柱１０の上下部１０ａ、１ｂに設置されたプレート１１
に、積層ゴム等からなる免震装置１２の上下部フランジ
１２ａ、１２ｂがそれぞれボルト１３によって固定され
ている。そして、プレート１１の外周に、角形の耐火被
覆材１４が固定されている。この耐火被覆材１４は、珪
酸カルシウム板や石膏成形板等の耐火材によって成形さ
れた板状部材で、その４隅には、部分的に取外し可能な
開閉部１４ａが形成されており、この開閉部１４ａを取
外すことによって、免震装置１２の上下部フランジ１２
ａ、１２ｂ部分やその取付用のボルト１３を点検するた
めの点検口が形成されるようになっている。そして、こ
れら上下の角形の耐火被覆材１４間に、複数に分割され
た円環板状の耐火被覆材１５…が互いに摺動自在に上下
方向に積層されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 5 show an embodiment in which a fireproof structure of a seismic isolation device according to the present invention is applied around a seismic isolation device interposed in a prism (axial member). Things. 1 to 3, reference numeral 10 denotes a prism 10, and a plate 11 installed on upper and lower portions 10 a and 1 b of the prism 10.
The upper and lower flanges 12a and 12b of the seismic isolation device 12 made of laminated rubber or the like are fixed by bolts 13, respectively. Then, a rectangular refractory covering material 14 is fixed to the outer periphery of the plate 11. The refractory coating material 14 is a plate-like member formed of a refractory material such as a calcium silicate plate or a gypsum molded plate. At four corners, a partially removable opening / closing portion 14a is formed. By removing the portion 14a, the upper and lower flanges 12 of the seismic isolation device 12 are removed.
An inspection opening for inspecting the portions a and 12b and the bolts 13 for mounting the same is formed. Between the upper and lower rectangular refractory coatings 14, a plurality of ring-shaped refractory coatings 15 are vertically slidably stacked on each other.
【００１５】この耐火被覆材１５は、耐火被覆材１４と
同様の耐火材によって成形されており、免震装置１２の
外周との間に所定厚さの空気層Ｓを介して、当該免震装
置１２を囲繞するように配設されている。ここで、耐火
被覆材１５の径方向の幅寸法は、隣接する耐火被覆材１
５との間に所要の耐火被覆厚が確保される寸法に設定さ
れており、さらに各耐火被覆材１５の互いの摺動面に
は、摩擦力を減じるためのテフロンシート等のすべり材
１６が介装または塗布されている。そして、各耐火被覆
材１５の内周部には、対向する免震装置１２の外周に向
けて突出する複数のスペーサ１７が、円周方向に等間隔
をおいた複数箇所（図では８箇所）に取付けられてい
る。このスペーサ１７は、図２に示すように硬質ゴム等
の所定の弾性を有する素材によって成形された中空部材
であり、免震装置１２の外周面１２ｃと僅かな間隔をお
いた状態で、耐火被覆材１５の内周面にビス１８によっ
て取付けられている。なお、このスペーサ１７は、ビス
１８に代えて接着によって耐火被覆材１５の内周面に固
定してもよい。The refractory coating material 15 is formed of the same refractory material as the refractory coating material 14, and is provided between the outer periphery of the seismic isolation device 12 and an air layer S having a predetermined thickness. 12 are arranged. Here, the width dimension of the refractory coating material 15 in the radial direction is equal to that of the adjacent refractory coating material 1.
5 is set to a dimension that ensures a required thickness of the refractory coating, and a sliding material 16 such as a Teflon sheet for reducing frictional force is provided on the sliding surfaces of the respective refractory coatings 15. Interposed or coated. A plurality of spacers 17 projecting toward the outer periphery of the opposing seismic isolation device 12 are provided on the inner peripheral portion of each refractory coating material 15 at a plurality of locations (eight locations in the figure) at equal intervals in the circumferential direction. Mounted on As shown in FIG. 2, the spacer 17 is a hollow member formed of a material having a predetermined elasticity such as hard rubber, and is provided with a fireproof coating at a slight distance from the outer peripheral surface 12c of the seismic isolation device 12. A screw 18 is attached to the inner peripheral surface of the member 15. The spacer 17 may be fixed to the inner peripheral surface of the refractory coating 15 by bonding instead of the screw 18.
【００１６】また、各々の耐火被覆材１５の所定位置に
は、切断部１９によって当該耐火被覆材１５の一部が取
外し可能な開閉部１５ａが形成されており、内部の免震
装置１２を点検する際に上記開閉部１５ａを取外すこと
により、点検口が形成されるようになっている。なお、
上記開閉部１５ａは、その片側の切断部１９を跨いで配
設された蝶番によって開閉自在に設けてもよい。さら
に、耐火被覆材１５の内周面には、上記開閉部１５ａを
跨いで補強材２０が架設されている。At a predetermined position of each of the refractory coatings 15, an opening / closing portion 15a from which a part of the refractory coating 15 can be removed by a cutting portion 19 is formed. The inspection opening is formed by removing the opening / closing portion 15a when performing the operation. In addition,
The opening / closing portion 15a may be provided so as to be openable and closable by a hinge disposed so as to straddle the cutting portion 19 on one side thereof. Further, a reinforcing member 20 is provided on the inner peripheral surface of the fireproof covering member 15 so as to straddle the opening / closing portion 15a.
【００１７】次いで、以上の構成からなる免震装置１２
の耐火被覆構造の作用について説明する。先ず、上記耐
火被覆構造にあっては、免震装置１２の外周を、空気層
Ｓを間に介して互いに摺動自在な複数の円環板状の耐火
被覆材１５によって囲繞するとともに、耐火被覆材１５
の摺動面にすべり材１６を介装しているので、図４に示
すように、地震時に角柱１０の上下部１０ａ、１０ｂ間
に相対変位が生じた場合には、各耐火被覆材１５が円滑
に摺動することによってこれに追従する。この際に、耐
火被覆材１５の内周面に、対向する免震装置１２の外周
に向けて突出するスペーサ１７を円周方向の複数箇所に
設けているので、これらスペーサ１７によって常に免震
装置１２の外周面と耐火被覆材１５の内周面との間に一
定の空気層Ｓを保持しつつ上記免震装置１２の動きに追
従する。Next, the seismic isolation device 12 having the above configuration
The function of the refractory coating structure of the first embodiment will be described. First, in the above-mentioned fire-resistant coating structure, the outer periphery of the seismic isolation device 12 is surrounded by a plurality of annular plate-shaped fire-resistant coating materials 15 slidable to each other with an air layer S interposed therebetween. Lumber 15
As shown in FIG. 4, when a relative displacement occurs between the upper and lower portions 10 a and 10 b of the prism 10 during the earthquake, each of the refractory coating materials 15 Follow this by sliding smoothly. At this time, since the spacers 17 projecting toward the outer periphery of the opposing seismic isolation device 12 are provided at a plurality of circumferential locations on the inner peripheral surface of the fireproof covering material 15, the spacers 17 are always used by these spacers 17. The seismic isolation device 12 follows the movement of the seismic isolation device 12 while maintaining a constant air layer S between the outer peripheral surface of the base 12 and the inner peripheral surface of the refractory coating material 15.
【００１８】次いで、図５に示すように、地震後に免震
装置１２が元の状態に復元する際にも、同様に耐火被覆
材１５もスペーサ１７を介して免震装置１２の外周面に
倣って整列されることにより、元の状態に復元する。こ
のように、上記免震装置１２の耐火被覆構造によれば、
上下に隣接する耐火被覆材１５間に大きなずれを生じる
ことがなく、よって常に耐火被覆材１５の全周にわたっ
て充分な接触長さが得られるために、所要の耐火被覆厚
を確保することができるとともに、免震装置１２の全周
に常にほぼ均一な空気層Ｓが形成される。したがって、
最も出火する危険性が高い地震後においても、確実に所
望の耐火性能を発揮することができる。また、耐火被覆
材１５間に、常に大きな耐火被覆厚を保持することがで
きるために、従来のものと比較して相対的に耐火被覆材
１５の径方向の幅寸法を小さく設定することができ、よ
って耐火被覆全体の小型化および軽量化も図ることが可
能になる。Next, as shown in FIG. 5, when the seismic isolation device 12 is restored to the original state after the earthquake, the fireproof covering material 15 similarly follows the outer peripheral surface of the seismic isolation device 12 via the spacer 17. To restore the original state. Thus, according to the fireproof structure of the seismic isolation device 12,
The required refractory coating thickness can be ensured because a large displacement does not occur between the vertically adjacent refractory coatings 15 and thus a sufficient contact length is always obtained over the entire circumference of the refractory coating 15. At the same time, a substantially uniform air layer S is always formed all around the seismic isolation device 12. Therefore,
Even after an earthquake that has the highest risk of fire, desired fire resistance performance can be reliably exhibited. Further, since a large refractory coating thickness can always be maintained between the refractory coating materials 15, the width of the refractory coating material 15 in the radial direction can be set to be relatively small as compared with the conventional one. Therefore, it is possible to reduce the size and weight of the entire refractory coating.
【００１９】また、定期的に免震装置１２の状態を点検
する場合には、各々の耐火被覆材１５の開閉部１５ａを
取外すことにより、耐火被覆材１５の側面に上下方向に
延在する点検口を形成し、この点検口から内部の免震装
置１２を点検することができる。この際に、点検口を円
周方向に回せば、耐火被覆材１５がスペーサ１７によっ
て免震装置１２の外周に沿って案内されつつ、すべり材
１６によって円滑に回動するために、容易に免震装置１
２の全周にわたってその点検を行なうことができる。加
えて、耐火被覆材１５の内周面には、上記点検口を跨い
で補強材２０が架設されているので、開閉部１５ａを取
外した後においても耐火被覆材１５の円環形状を保持す
ることができる。さらに、角形の耐火被覆材１４の４隅
の開閉部１４ａを取外すことにより、当該４隅に形成さ
れた点検口から、免震装置１２の上下部フランジ１２
ａ、１２ｂ部分およびその取付用ボルト１３の取付状態
を点検することができる。When the condition of the seismic isolation device 12 is regularly inspected, the opening / closing portion 15a of each refractory covering material 15 is removed, so that the inspection extends vertically on the side surface of the refractory covering material 15. An opening is formed, and the interior seismic isolation device 12 can be inspected from the inspection opening. At this time, if the inspection port is turned in the circumferential direction, the fireproof coating material 15 is guided along the outer periphery of the seismic isolation device 12 by the spacer 17 and is smoothly rotated by the sliding material 16. Seismic device 1
2 can be inspected over the entire circumference. In addition, since the reinforcing member 20 is provided on the inner peripheral surface of the fireproof covering material 15 across the inspection port, the annular shape of the fireproof covering material 15 is maintained even after the opening / closing portion 15a is removed. be able to. Further, by removing the opening / closing portions 14a at the four corners of the rectangular fireproof covering material 14, the upper and lower flanges 12 of the seismic isolation device 12 can be opened from the inspection openings formed at the four corners.
It is possible to check the mounting state of the parts a and 12b and the mounting bolts 13 thereof.
【００２０】なお、上記実施の形態においては、円環板
状に形成した複数の耐火被覆材１５によって免震装置１
２を囲繞した場合についてのみ説明したが、これに限定
されるものではなく、当該耐火被覆材１５として多角形
の環状に形成したものを用いても同様の作用効果を得る
ことができる。また、スペーサ１７の配置については、
周方向に等間隔をおいて配設することが好適であるが、
その数については、柱の寸法に応じて適宜選択すること
が可能である。さらに、上記実施の形態では、本発明に
係る免震装置の耐火被覆構造を、角柱１０に介装された
免震装置１２の耐火被覆構造に適用した場合についての
み説明したが、これに限るものではなく、円柱にも同様
に適用することができ、この場合には、免震装置を囲繞
する複数の耐火被覆材をすべて円環状に形成すればよ
い。In the above embodiment, the seismic isolation device 1 is provided by the plurality of refractory covering members 15 formed in a ring shape.
Although the description has been given only of the case where the surrounding area 2 is surrounded, the present invention is not limited to this, and the same operation and effect can be obtained even if the fire-resistant coating material 15 is formed in a polygonal ring shape. Regarding the arrangement of the spacer 17,
It is preferable to arrange at equal intervals in the circumferential direction,
The number can be appropriately selected according to the dimensions of the pillar. Furthermore, in the above-described embodiment, the case where the fireproof structure of the seismic isolation device according to the present invention is applied to the fireproof structure of the seismic isolation device 12 interposed in the prism 10 has been described, but is not limited thereto. Instead, the present invention can be similarly applied to a cylinder, and in this case, all of the plurality of fireproof covering materials surrounding the seismic isolation device may be formed in an annular shape.
【００２１】[0021]
【発明の効果】以上説明したように、請求項１〜３のい
ずれかに記載の耐火被覆構造によれば、耐火被覆材の内
周部に、対向する免震装置の外周に向けて突出するスペ
ーサを設けているので、地震後に免震装置が元の状態に
復元する際に、耐火被覆材も上記スペーサを介して免震
装置の外周面に倣って整列されることにより、元の状態
に復元するために、常に上下に隣接する耐火被覆材間に
所要の耐火被覆厚を確保することができるとともに、免
震装置の全周にわたってほぼ均一空気層を保持すること
ができ、よって最も出火する危険性が高い地震後におい
ても、確実に所望の耐火性能を発揮することができる。
加えて、耐火被覆材間に、常に大きな耐火被覆厚を保持
することができるために、従来のものと比較して相対的
に耐火被覆材の径方向の幅寸法を小さく設定することが
でき、よって耐火被覆全体の小型化および軽量化も図る
ことも可能になる。As described above, according to the fireproof covering structure according to any one of claims 1 to 3, the inner periphery of the fireproof covering material projects toward the outer periphery of the seismic isolation device facing the same. Because the spacers are provided, when the seismic isolation device is restored to the original state after the earthquake, the fireproof covering material is also aligned along the outer peripheral surface of the seismic isolation device via the spacers, thereby returning to the original state. In order to restore, the required fireproof coating thickness can always be secured between the upper and lower adjacent fireproof coating materials, and a substantially uniform air layer can be maintained over the entire circumference of the seismic isolation device, so that the most fire occurs Even after a highly dangerous earthquake, the desired fire resistance performance can be reliably exhibited.
In addition, between the refractory coating materials, since it is possible to always maintain a large refractory coating thickness, the radial width of the refractory coating material can be set relatively small as compared with the conventional one, Therefore, it is also possible to reduce the size and weight of the entire refractory coating.
【００２２】また特に、請求項２に記載の発明によれ
ば、耐火被覆材の点検口を開いて、これを周方向に回動
させることにより、全ての耐火被覆材を取り外すことな
く、免震装置の全周にわたってその点検を行なうことが
でき、さらに請求項３に記載の発明によれば、すべり材
によって上述した地震時における追従性が一層向上する
とともに、上記スペーサを設けた効果とあいまって、地
震後における復元も一層円滑に行なわれるために、耐火
性能をより確実に保持することがが可能になり、かつ点
検時においても、耐火被覆材を少ない力で回動すること
ができるために、作業が一段と容易になるといった効果
が得られる。In particular, according to the second aspect of the present invention, by opening the inspection port of the fireproof covering material and rotating it in the circumferential direction, the seismic isolation can be performed without removing all the fireproof covering material. Inspection can be performed over the entire circumference of the device. Further, according to the invention described in claim 3, the following ability at the time of the above-mentioned earthquake is further improved by the slip material, and the effect of providing the spacer is combined. In addition, since the restoration after the earthquake is performed more smoothly, it is possible to more reliably maintain the fire resistance performance, and also, at the time of inspection, the fire-resistant coating material can be rotated with a small force. And the effect that the work is further facilitated is obtained.
【図１】本発明の免震装置の耐火被覆構造の一実施形態
を示す横断面図である。FIG. 1 is a cross-sectional view showing one embodiment of a fireproof covering structure of a seismic isolation device of the present invention.
【図２】図１のスペーサ取付部分の拡大縦断面図であ
る。FIG. 2 is an enlarged vertical sectional view of a spacer mounting portion of FIG.
【図３】図１の側面図である。FIG. 3 is a side view of FIG. 1;
【図４】図３の地震時の変形状態を示す側面図である。FIG. 4 is a side view showing a deformation state at the time of the earthquake of FIG. 3;
【図５】図４の地震後の復元状態を示す側面図である。FIG. 5 is a side view showing a restored state after the earthquake of FIG. 4;
【図６】従来の免震装置の耐火被覆構造を示す側面図で
ある。FIG. 6 is a side view showing a fireproof covering structure of a conventional seismic isolation device.
【図７】図６の地震時の変形状態を示す側面図である。FIG. 7 is a side view showing a deformation state at the time of the earthquake of FIG. 6;
【図８】図７の地震後の復元状態を示す側面図である。FIG. 8 is a side view showing a restored state after the earthquake of FIG. 7;
【図９】従来の他の免震装置の耐火被覆構造を示す側面
図である。FIG. 9 is a side view showing a fireproof covering structure of another conventional seismic isolation device.
【図１０】図９の地震時の変形状態を示す側面図であ
る。FIG. 10 is a side view showing a deformation state at the time of the earthquake of FIG. 9;
【図１１】図１０の地震後の状態を示す側面図である。FIG. 11 is a side view showing the state after the earthquake of FIG. 10;
【符号の説明】 １０ 角柱（軸力材） １０ａ 角柱の上部 １０ｂ 角柱の下部 １２ 免震装置 １４ 角形の耐火被覆材 １５ 円環状の耐火被覆材 １４ａ、１５ａ 開閉部 １６ すべり材 １７ スペーサ[Description of Signs] 10 prism (axial force member) 10a upper part of prism 10b lower part of prism 12 seismic isolation device 14 square fireproof coating material 15 annular fireproof coating material 14a, 15a opening / closing part 16 sliding material 17 spacer
Claims (3)
空気層を間に介して複数に分割された環状の耐火被覆材
を互いに摺動自在に上下方向に積層することによって当
該免震装置を囲繞し、かつ上記耐火被覆材の内周部に、
対向する上記免震装置の外周に向けて突出するスペーサ
を設けてなることを特徴とする免震装置の耐火被覆構
造。1. An outer periphery of a seismic isolation device interposed in an axial force member,
Surrounding the seismic isolation device by laminating a plurality of annular refractory coating materials slidably over each other with an air layer interposed therebetween, and on the inner peripheral portion of the refractory coating material,
A fireproof covering structure for a seismic isolation device, comprising a spacer protruding toward the outer periphery of the opposing seismic isolation device.
が設けられていることを特徴とする請求項１に記載の免
震装置の耐火被覆構造。2. The fire-resistant covering structure of the seismic isolation device according to claim 1, wherein the fire-resistant covering material is provided with an inspection port that can be opened and closed.
れ、かつ互いの摺動面に摩擦力を減じるためのすべり材
が介装されていることを特徴とする請求項１または２に
記載の免震装置の耐火被覆構造。3. The refractory covering material is formed in an annular plate shape, and a sliding material for reducing frictional force is interposed on sliding surfaces of each other. The fire-resistant covering structure of the seismic isolation device according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8881997A JPH10266400A (en) | 1997-03-24 | 1997-03-24 | Fire resistant covering structure of base-isolated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8881997A JPH10266400A (en) | 1997-03-24 | 1997-03-24 | Fire resistant covering structure of base-isolated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10266400A true JPH10266400A (en) | 1998-10-06 |
Family
ID=13953538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8881997A Pending JPH10266400A (en) | 1997-03-24 | 1997-03-24 | Fire resistant covering structure of base-isolated device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10266400A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193358A (en) * | 2016-08-31 | 2016-12-07 | 四川省建筑科学研究院 | A kind of array disc type energy-eliminating shock-absorbing device |
| CN106193750A (en) * | 2016-08-31 | 2016-12-07 | 四川省建筑科学研究院 | A kind of combination disc type energy-eliminating shock-absorbing device |
| CN106193359A (en) * | 2016-08-31 | 2016-12-07 | 四川省建筑科学研究院 | A kind of disc type energy-eliminating shock-absorbing device |
| CN109811927A (en) * | 2019-03-19 | 2019-05-28 | 中国矿业大学 | Fire prevention shock isolating pedestal device and fire prevention shock isolation method under a kind of geological process |
-
1997
- 1997-03-24 JP JP8881997A patent/JPH10266400A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193358A (en) * | 2016-08-31 | 2016-12-07 | 四川省建筑科学研究院 | A kind of array disc type energy-eliminating shock-absorbing device |
| CN106193750A (en) * | 2016-08-31 | 2016-12-07 | 四川省建筑科学研究院 | A kind of combination disc type energy-eliminating shock-absorbing device |
| CN106193359A (en) * | 2016-08-31 | 2016-12-07 | 四川省建筑科学研究院 | A kind of disc type energy-eliminating shock-absorbing device |
| CN109811927A (en) * | 2019-03-19 | 2019-05-28 | 中国矿业大学 | Fire prevention shock isolating pedestal device and fire prevention shock isolation method under a kind of geological process |
| CN109811927B (en) * | 2019-03-19 | 2023-11-14 | 中国矿业大学 | Fireproof and shock-insulation support device under earthquake action and fireproof and shock-insulation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101111699B1 (en) | Access Floor Supporting Structure equipped with Earthquake-proof Head | |
| JPH10266400A (en) | Fire resistant covering structure of base-isolated device | |
| JPH05215129A (en) | Thrust shaft coupling device, bearing member for said device and shaft member | |
| KR102010187B1 (en) | Safety ties for double bottom structures | |
| JP5156207B2 (en) | Fireproof coating structure | |
| JP6202331B2 (en) | Floor structure and construction method of floor structure | |
| JP2011226118A (en) | Fire resistive covering structure for base isolation device | |
| JP2020122381A (en) | Seismic isolator for wooden building | |
| JPH10159381A (en) | Isolator, and isolator element having roller | |
| JP5687040B2 (en) | Fireproof coating structure for seismic isolation sliding bearings | |
| JP2006144476A (en) | Base-isolating device and building structure | |
| KR100923977B1 (en) | Access Floor Supporting Structure equipped with Earthquake-proof Head | |
| JPH06229036A (en) | Fire resistive construction of building | |
| JP4648721B2 (en) | Base isolation structure for buildings | |
| JP2001227176A (en) | Upper addition method of existing building | |
| JP5356743B2 (en) | Fireproof coating structure for seismic isolation devices | |
| JP2002161594A (en) | Fire resistant coating method of base isolation device | |
| JPH0336990B2 (en) | ||
| JPH11193579A (en) | Fire-resistive enclosure structure of base isolation device | |
| JP2002061413A (en) | Laminated rubber for base isolation and mounting part structure therefor | |
| JP7169165B2 (en) | Constraint method of seismic isolation device | |
| JPH0392633A (en) | Vibration free isolator | |
| KR20180126657A (en) | A three dimension seismic isolator for maintaining easily | |
| JP2001182362A (en) | Seismic isolator and building construction using the same | |
| JP2908422B1 (en) | Integrated seismic isolation structure with sliding friction |