JP5231934B2

JP5231934B2 - Laminated rubber bearing

Info

Publication number: JP5231934B2
Application number: JP2008268276A
Authority: JP
Inventors: 茂明加治木
Original assignee: Oiles Corp
Current assignee: Oiles Corp
Priority date: 2008-10-17
Filing date: 2008-10-17
Publication date: 2013-07-10
Anticipated expiration: 2028-10-17
Also published as: JP2010096290A

Description

本発明は、積層ゴム支承体であって、特に、ゴム層と補強板とを交互に積層し、かつ上下端面にフランジ部材又は厚肉鋼板を接合してなる積層ゴムにおいて、積層ゴム体内に鉛等の弾塑性金属材料を封入して水平方向の振動を吸収する積層ゴム支承体に関する。 The present invention is a laminated rubber bearing, particularly in a laminated rubber in which rubber layers and reinforcing plates are alternately laminated and a flange member or a thick steel plate is joined to the upper and lower end surfaces. The present invention relates to a laminated rubber bearing that encloses an elastic-plastic metal material such as the like and absorbs horizontal vibration.

従来、上述のような構成を有する積層ゴム支承体は、地震等の外乱により水平せん断変形を生じる際に、弾塑性金属材料がゴム層に過大に食い込み、ゴム層と補強板との接着部分が損傷することがある。特に、積層ゴム支承体の水平せん断変形時に、積層ゴム支承体の積層方向の中間部分に比べて積層方向の両端のフランジ部材等に近い弾塑性金属材料に生じる応力が大きいため、この部分で弾塑性金属材料がゴム層に食い込み、ゴム層と補強板の接着部分が損傷したり、この部分の補強板が変形する虞がある。そこで、該積層ゴム支承体のゴム層と補強板との接着部分の損傷や、補強板の変形による性能低下等の不具合を防止するため、幾つかの技術が提案されている。 Conventionally, in the laminated rubber bearing having the above-described configuration, when horizontal shear deformation occurs due to disturbance such as an earthquake, the elastic-plastic metal material excessively bites into the rubber layer, and the bonded portion between the rubber layer and the reinforcing plate is May be damaged. In particular, during horizontal shear deformation of the laminated rubber bearing body, the stress generated in the elasto-plastic metal material near the flange members at both ends in the lamination direction is larger than that in the middle part of the laminated rubber bearing body in the lamination direction. There is a possibility that the plastic metal material bites into the rubber layer, damages the bonded portion between the rubber layer and the reinforcing plate, or deforms the reinforcing plate in this portion. In view of this, several techniques have been proposed in order to prevent problems such as damage to the bonded portion between the rubber layer and the reinforcing plate of the laminated rubber support and performance deterioration due to deformation of the reinforcing plate.

特許文献１には、ゴム層と補強板とを交互に積層し、上下に厚肉補強板を接合した積層ゴム体の貫通孔内に鉛を充填した鉛プラグ入り積層ゴム支承体において、該ゴム層の各々に、前記補強板及び厚肉補強板の内径と同じ内径を有し、かつ外径を小さくした中間プレートを配した構成が開示されている。 Patent Document 1 discloses a laminated rubber bearing body with a lead plug in which a rubber layer and a reinforcing plate are alternately laminated and lead is filled in a through-hole of a laminated rubber body in which thick reinforcing plates are joined vertically. An arrangement in which an intermediate plate having the same inner diameter as that of the reinforcing plate and the thick reinforcing plate and having a smaller outer diameter is disposed on each of the layers is disclosed.

本構成により、ゴム層の厚みが比較的厚くとも、前記中間プレートを各ゴム層に配するため、ゴム層への鉛の過大な食い込みを防止することができ、効果的に鉛プラグを拘束することができ、所定の減衰効果が安定的に得られるという好ましい効果が得られる。その反面、鉛プラグの周囲には、補強板と中間プレートの両方が密に配されているため、鉛プラグの鉛直方向の硬さが設計された値より大きくなる傾向にあった。 With this configuration, even if the rubber layer is relatively thick, the intermediate plate is disposed in each rubber layer, so that excessive penetration of lead into the rubber layer can be prevented, and the lead plug is effectively restrained. Therefore, it is possible to obtain a preferable effect that a predetermined attenuation effect can be stably obtained. On the other hand, since both the reinforcing plate and the intermediate plate are densely arranged around the lead plug, the vertical hardness of the lead plug tends to be larger than the designed value.

そこで、特許文献２には、積層ゴム支承体のすべてのゴム層において、弾塑性金属材料との拘束力を高めるのではなく、積層方向の両端の厚肉鋼板に近い弾塑性金属材料周辺部分の拘束力を高めるようにした技術も開示されている。 Therefore, in Patent Document 2, in all the rubber layers of the laminated rubber support body, the binding force with the elastic-plastic metal material is not increased, but the peripheral portion of the elastic-plastic metal material near the thick steel plates at both ends in the lamination direction is disclosed. A technique for enhancing the binding force is also disclosed.

また、特許文献３に記載の鉛封入積層ゴムは、積層方向の両端の厚肉鋼板に近い弾塑性金属材料周辺部分の補強板の枚数を多くし、当該箇所での弾塑性金属材料の拘束力を高めるようにしている。 In addition, the lead-filled laminated rubber described in Patent Document 3 increases the number of reinforcing plates in the peripheral portion of the elastic-plastic metal material close to the thick steel plates at both ends in the lamination direction, and the binding force of the elastic-plastic metal material at that location. To increase.

さらに、特許文献１乃至３は、鉛プラグを拘束する積層ゴム体内に配される補強板の配置、枚数等によりゴム層への過大な鉛の食い込みを防止する発明を開示するが、特許文献４には、補強板については特別な工夫をしないで、鉛プラグと接するゴム材料の部分、詳しくは、積層ゴム体の各ゴム層に設けられる貫通孔の周囲の所定幅領域のゴム硬度を、他の部分より高くすることで、ゴム層への鉛の食い込みを防止する技術が開示されている。 Further, Patent Documents 1 to 3 disclose an invention that prevents excessive lead biting into the rubber layer by the arrangement, the number, and the like of reinforcing plates disposed in the laminated rubber body that restrains the lead plug. The reinforcing plate is not specially devised, and the rubber material part in contact with the lead plug, more specifically, the rubber hardness of the predetermined width region around the through hole provided in each rubber layer of the laminated rubber body, The technique which prevents the biting of the lead into a rubber layer by making it higher than this part is disclosed.

特開２００１−３５５６７６号公報JP 2001-355676 A 特開２００５−１４６６８０号公報JP 2005-146680 A 特許第３５０３７１２号公報Japanese Patent No. 3503712 特開２００１−０１２５４５号公報JP 2001-012545 A

特許文献１に記載の鉛プラグ入り積層ゴム装置では、鉛直方向の硬さが設計された値より大きくなる傾向があり、特許文献３に記載の鉛封入積層ゴムは、薄肉補強板の枚数を変えることによりゴム層の厚みも変化するため、設計面及び製造面で手間がかかるという問題があった。 In the laminated rubber device with a lead plug described in Patent Document 1, the hardness in the vertical direction tends to be larger than the designed value, and the lead-filled laminated rubber described in Patent Document 3 changes the number of thin reinforcing plates. As a result, the thickness of the rubber layer also changes, and there is a problem that it takes time and effort in terms of design and manufacturing.

特許文献４においても、すべてのゴム層において、設けられた貫通孔の周囲の所定幅領域に配するゴム材料の硬度を、他の部分の硬度と比べて高くするため、鉛直方向の硬さが設計された値より大きくなる傾向がある。 Also in Patent Document 4, in all the rubber layers, the hardness of the rubber material disposed in the predetermined width region around the provided through hole is made higher than the hardness of the other portions. There is a tendency to be larger than the designed value.

上記特許文献１乃至４に示されるように、従来、弾塑性金属材料を封入して水平方向の振動を吸収する積層ゴム支承体において、該弾塑性金属材料のゴム層への過大な食い込みを防止する技術は、弾塑性金属材料と接する積層ゴム体の中空孔部内周面の剛性を高めるものであり、硬さの異なるゴム材料と補強板とが弾塑性金属材料と接する範囲に存在する構成を取る限り、これらの境界部分に応力が集中することは避けられない。 As shown in Patent Documents 1 to 4 above, in a conventional laminated rubber bearing that encapsulates an elastic-plastic metal material and absorbs vibration in the horizontal direction, excessive penetration of the elastic-plastic metal material into the rubber layer is prevented. The technology to increase the rigidity of the inner peripheral surface of the hollow hole portion of the laminated rubber body in contact with the elastoplastic metal material, and has a configuration in which the rubber material having different hardness and the reinforcing plate exist in a range in contact with the elastoplastic metal material. As long as it is taken, it is inevitable that stress concentrates on these boundary portions.

そこで、本発明は、上記従来技術における問題点に鑑みてなされたものであって、ゴム材料と補強板とが弾塑性金属材料と接する境界部分における応力集中を回避し、ゴム層と補強板境界部の損傷を防止しうる積層ゴム支承体を提供することを目的とする。 Therefore, the present invention has been made in view of the problems in the prior art described above, and avoids stress concentration at the boundary portion where the rubber material and the reinforcing plate are in contact with the elastic-plastic metal material, and the boundary between the rubber layer and the reinforcing plate. It is an object of the present invention to provide a laminated rubber bearing body capable of preventing damage to a part.

上記目的を達成するため、本発明は、ゴム層と補強板とを交互に積層した積層ゴム部の上下端面に各々フランジプレートが接合されて形成され、前記フランジプレート及び前記積層ゴム部に上下方向に貫通する貫通孔を有する積層ゴム体と、該貫通孔に封入された円柱状の弾塑性金属材料プラグとを備える積層ゴム支承体において、前記各々のフランジプレートの近傍の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径が、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径よりも大きく、前記各々のフランジプレートの近傍の補強板の弾塑性金属材料プラグ挿入用孔の内周面と、前記弾塑性金属材料プラグの外周面との間に、ゴム材料からなる緩衝部材が配され、前記フランジプレートに穿設された貫通孔と、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔は同径に形成されていることを特徴とする。 In order to achieve the above object, the present invention is formed by joining flange plates to upper and lower end surfaces of a laminated rubber portion in which rubber layers and reinforcing plates are alternately laminated, and vertically extending to the flange plate and the laminated rubber portion. A laminated rubber bearing body comprising a laminated rubber body having a through-hole penetrating therethrough and a cylindrical elastic-plastic metal material plug sealed in the through-hole, and is formed in a reinforcing plate in the vicinity of each flange plate. The diameter of the elastic-plastic metal material plug insertion hole is larger than the diameter of the elastic-plastic metal material plug insertion hole drilled in the intermediate reinforcing plate, and the elastic plasticity of the reinforcing plate in the vicinity of each flange plate A buffer member made of a rubber material is disposed between the inner peripheral surface of the metal material plug insertion hole and the outer peripheral surface of the elastoplastic metal material plug, and a through hole formed in the flange plate and an intermediate portion of Drilled in the strong plate elastoplastic metallic material plug insertion hole is characterized in that it is formed in the same diameter.

そして、本発明によれば、積層ゴム支承体の動作中に、応力が集中する各々のフランジプレートの近傍の補強板と弾塑性金属材料プラグの外周面とが接することがないため、応力集中による損傷を防止することができる。 According to the present invention, during the operation of the laminated rubber bearing, the reinforcing plate in the vicinity of each flange plate where the stress is concentrated does not contact the outer peripheral surface of the elastic-plastic metal material plug. Damage can be prevented.

また、本発明は、上下構造物の各々に取り付けられる取付用鋼板と、ゴム層と補強板とを交互に積層した積層ゴム部の上下端面に各々、前記取付用鋼板の各々と緊結される厚肉鋼板が配されて形成され、該厚肉鋼板及び前記積層ゴム部に上下方向に貫通する貫通孔を有する積層ゴム体と、該貫通孔に封入された円柱状の弾塑性金属材料プラグとを備える積層ゴム支承体において、前記各々の厚肉鋼板の近傍の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径が、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径よりも大きく、前記各々の厚肉鋼板の近傍の補強板の弾塑性金属材料プラグ挿入用孔の内周面と、前記弾塑性金属材料プラグの外周面との間に、ゴム材料からなる緩衝部材が配され、前記厚肉鋼板に穿設された貫通孔と、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔は同径に形成されていることを特徴とする。 Further, the present invention provides a steel sheet for mounting attached to each of the upper and lower structures, and upper and lower end surfaces of the laminated rubber portion in which the rubber layers and the reinforcing plates are alternately stacked. A laminated rubber body having a through hole penetrating vertically in the thick steel plate and the laminated rubber part, and a cylindrical elastic-plastic metal material plug enclosed in the through hole. An elastic-plastic metal material plug in which the diameter of the elastic-plastic metal plug insertion hole formed in the reinforcing plate in the vicinity of each of the thick steel plates is provided in the intermediate reinforcing plate in the laminated rubber bearing provided Between the inner peripheral surface of the elastic-plastic metal material plug insertion hole of the reinforcing plate in the vicinity of each thick-walled steel plate and the outer peripheral surface of the elastic-plastic metal material plug larger than the diameter of the insertion hole, rubber cushioning member made of a material is arranged, which is formed in the thick steel plate And through holes, drilled elastoplastic metallic material plug insertion hole in the reinforcing plate of the intermediate portion is characterized in that it is formed in the same diameter.

本発明によれば、積層ゴム支承体の動作中に、応力が集中する各々の厚肉鋼板の近傍の補強板と弾塑性金属材料プラグの外周面とが接することがないため、応力集中による損傷を防止することができる。 According to the present invention, during the operation of the laminated rubber bearing, the reinforcing plate in the vicinity of each thick steel plate on which stress is concentrated does not contact the outer peripheral surface of the elastoplastic metal material plug. Can be prevented.

上記積層ゴム支承体において、前記緩衝部材を前記ゴム層と同一の材料で形成し、かつ前記ゴム層と一体的に加硫成型されていることができる。 In the laminated rubber bearing body can be pre-forming the Kiyuru衝部material in the rubber layer and the same material, and is the rubber layer integral with vulcanization.

また、上記積層ゴム支承体において、前記各々のフランジプレート又は各々の厚肉鋼板の近傍の補強板と接するゴム層の、該補強板の略々内径位置から弾塑性金属材料プラグの外周面までの範囲と、前記緩衝部材のゴム材料を、他のゴム層部分のゴム硬度より高いゴム材料とすることができ、かつ該他のゴム層と一体的に加硫成型することができる。これにより、弾塑性金属材料プラグのゴム層への食い込みをさらに効果的に抑制することができる。 Further, in the laminated rubber bearing, from the substantially inner diameter position of the reinforcing plate to the outer peripheral surface of the elastoplastic metal material plug of the rubber layer in contact with the reinforcing plate in the vicinity of each flange plate or each thick steel plate The rubber material of the range and the buffer member can be a rubber material higher than the rubber hardness of the other rubber layer portion, and can be integrally vulcanized and molded with the other rubber layer. Thereby, the biting into the rubber layer of the elastic-plastic metal material plug can be further effectively suppressed.

さらに、上記積層ゴム支承体において、前記各々のフランジプレート又は各々の厚肉鋼板の近傍の補強板と接するゴム層の、該補強板の略々内径位置から弾塑性金属材料プラグの外周面までの範囲と、前記緩衝部材のゴム材料を天然ゴム材料とし、他のゴム層部分のゴム材料を高減衰性ゴム材料とすることができる。この構成によれば、反発弾性能力の優れた天然ゴム材料を弾塑性金属材料プラグの食い込みが生じやすい領域に配することができ、さらに優れた効果を生じさせることが可能となるとともに、積層ゴム支承体全体の減衰性能をゴム材料と弾塑性金属材料プラグ両方の和とすることができるため、弾塑性金属材料プラグの大きさ（径）を小さくすることができ、ゴム層への弾塑性金属材料プラグの食い込みを抑制する効果がある。 Furthermore, in the laminated rubber bearing, from the substantially inner diameter position of the reinforcing plate to the outer peripheral surface of the elastic-plastic metal material plug, the rubber layer in contact with the reinforcing plate in the vicinity of each flange plate or each thick steel plate The rubber material of the range and the cushioning member can be a natural rubber material, and the rubber material of the other rubber layer portion can be a high damping rubber material. According to this configuration, it is possible to arrange a natural rubber material having excellent rebound resilience ability in a region where the elastoplastic metal material plug is likely to be bitten, and it is possible to produce a more excellent effect and to obtain laminated rubber. Since the damping performance of the entire support body can be the sum of both rubber material and elastic-plastic metal material plug, the size (diameter) of the elastic-plastic metal material plug can be reduced, and the elastic-plastic metal to the rubber layer There is an effect of suppressing the biting of the material plug.

また、上記積層ゴム支承体において、前記弾塑性金属材料プラグを、鉛、錫、又はそれらの合金で形成することができ、これらの金属は、積層ゴム支承体が大きな水平変形を生じても追従し、かつエネルギー吸収に優れるため、上記構造上の効果と相まって長期間の安定性と好ましい減衰効果を有する積層ゴム支承体を構成することができる。 In the laminated rubber bearing body, the elastic-plastic metal material plug can be formed of lead, tin, or an alloy thereof, and these metals follow even if the laminated rubber bearing body undergoes a large horizontal deformation. And since it is excellent in energy absorption, the laminated rubber bearing body which has long-term stability and a favorable damping effect combined with the above structural effects can be constituted.

以上のように、本発明によれば、ゴム材料と補強板とが弾塑性金属材料と接する境界部分における応力集中を回避し、ゴム層と補強板の境界部の損傷を防止しうる積層ゴム支承体を提供することができる。 As described above, according to the present invention, the laminated rubber bearing capable of avoiding stress concentration at the boundary portion where the rubber material and the reinforcing plate are in contact with the elastic-plastic metal material and preventing the boundary portion between the rubber layer and the reinforcing plate. The body can be provided.

次に、本発明の実施の形態について、図面を参照しながら説明する。 Next, embodiments of the present invention will be described with reference to the drawings.

図１（ａ）は、本発明にかかる積層ゴム支承体の第１の実施の形態を示し、この積層ゴム支承体１は、いわゆるフランジ一体型であって、ゴム層４と補強板５とを交互に積層して形成された積層ゴム部６と、積層ゴム部６の上下端面に各々接合されるフランジプレート７、８とからなる積層ゴム体１６と、積層ゴム部６に封入された弾塑性金属材料プラグ（鉛プラグ）１０と、フランジプレート７、８の各々に、鉛プラグ１０を封入するために備えられたキャッププレート１１、１２で構成される。尚、上記弾塑性金属材料としては、鉛、錫、又はそれらの合金等を用いることができるが、以下の説明では、鉛を用いるものとする。 FIG. 1A shows a first embodiment of a laminated rubber bearing according to the present invention. This laminated rubber bearing 1 is a so-called flange-integrated type, and includes a rubber layer 4 and a reinforcing plate 5. Laminated rubber body 16 composed of laminated rubber portions 6 formed by alternately laminating, flange plates 7 and 8 respectively joined to the upper and lower end surfaces of laminated rubber portion 6, and elastoplasticity enclosed in laminated rubber portion 6. Each of the metal material plug (lead plug) 10 and the flange plates 7 and 8 includes cap plates 11 and 12 provided for enclosing the lead plug 10. In addition, as said elastic-plastic metal material, although lead, tin, or those alloys etc. can be used, suppose that lead is used in the following description.

積層ゴム部６は、図２に示すように、ゴム層４と補強板５とを交互に積層して形成され、上下方向に貫通する貫通孔９を備える。また、図１及び図２に示すように、この積層ゴム部６のフランジプレート７、８の近傍の補強板５ａ、５ｂに穿設された鉛プラグ挿入用孔の径Ｄ’は、中間部の補強板５に穿設された鉛プラグ挿入用孔の径Ｄ（鉛プラグ１０の外径と略々等しい）よりも大きく形成される。 As shown in FIG. 2, the laminated rubber portion 6 is formed by alternately laminating the rubber layers 4 and the reinforcing plates 5 and includes through holes 9 penetrating in the vertical direction. Further, as shown in FIGS. 1 and 2, the diameter D ′ of the lead plug insertion hole formed in the reinforcing plates 5a and 5b in the vicinity of the flange plates 7 and 8 of the laminated rubber portion 6 is the intermediate portion. The lead plug insertion hole formed in the reinforcing plate 5 is formed larger than the diameter D (substantially equal to the outer diameter of the lead plug 10).

補強板５ａ、５ｂの鉛プラグ挿入用孔の内周面と、鉛プラグ１０の外周面との間には、図１（ｂ）に明示するように、ゴム層４と同一の材料で形成した緩衝部材１４を配する。 Between the inner peripheral surface of the lead plug insertion hole of the reinforcing plates 5a and 5b and the outer peripheral surface of the lead plug 10, it is formed of the same material as the rubber layer 4 as clearly shown in FIG. The buffer member 14 is disposed.

図３に示すように、上側フランジプレート７は、鋼板により、全体が円板状に形成され、積層ゴム部６の貫通孔９と同径の貫通孔７ａと、上側キャッププレート１１を嵌合するための凹部７ｂとを備える。尚、下側フランジプレート８も、上側フランジプレート７と同様の構成を有する。 As shown in FIG. 3, the upper flange plate 7 is entirely formed of a steel plate in a disc shape, and the upper cap plate 11 is fitted into a through hole 7 a having the same diameter as the through hole 9 of the laminated rubber portion 6. And a recess 7b. The lower flange plate 8 also has the same configuration as the upper flange plate 7.

図１に示すように、上側キャッププレート１１は、鋼板により、全体が円板状に形成され、上側フランジプレート７の凹部７ｂに嵌挿される程度の外径を有する。尚、下側キャッププレート１２も、上側キャッププレート１１と同様の構成を有する。 As shown in FIG. 1, the upper cap plate 11 is formed of a steel plate in the shape of a disk and has an outer diameter that can be fitted into the recess 7 b of the upper flange plate 7. The lower cap plate 12 has the same configuration as the upper cap plate 11.

次に、上記構成を有する積層ゴム支承体１の製造方法について、図４を中心に参照しながら説明する。 Next, a method for manufacturing the laminated rubber bearing body 1 having the above-described configuration will be described with reference to FIG.

同図に示すように、まず、加硫成型用金型の下板２１の中央に設けた凹部２１ａに、成型後に挿入する鉛プラグ１０の外径と略々同一の外径を有する成型用中心ピン２２を嵌めて立設し、さらに下板２１の中央位置から対称に所定の距離をおいて設けた２つの凹部２１ｂ、２１ｃに、鋼板位置決め用ピン２４、２５を各々嵌めて立設する。 As shown in the figure, first, a molding center having an outer diameter substantially the same as the outer diameter of the lead plug 10 to be inserted into the recess 21a provided in the center of the lower plate 21 of the vulcanization molding die. The pins 22 are fitted and erected, and the steel plate positioning pins 24 and 25 are respectively fitted and erected in the two recesses 21b and 21c provided symmetrically from the center position of the lower plate 21.

次に、予め中心位置に鉛プラグ１０の直径と略々同一の孔加工と、鋼板位置決め用ピン２４、２５に対応する位置に該ピン２４、２５と略々同一の孔加工がなされ、未加硫ゴム板４ａと接触する範囲に接着処理が施された下側フランジプレート８を、磁石等により吊り上げ、成型用中心ピン２２と鋼板位置決め用ピン２４、２５に貫通させながら加硫成型用金型の下板２１の上面に載置する。次に、加硫成型用金型の筒体２０を据え付ける。 Next, a hole process substantially the same as the diameter of the lead plug 10 is preliminarily formed at the center position, and a hole process substantially identical to the pins 24 and 25 is performed at positions corresponding to the steel plate positioning pins 24 and 25. The lower flange plate 8 that has been subjected to the adhesion treatment within the range in contact with the vulcanized rubber plate 4a is lifted by a magnet or the like, and is passed through the molding center pin 22 and the steel plate positioning pins 24, 25 while being vulcanized and molded. It is placed on the upper surface of the lower plate 21. Next, the cylinder 20 of the vulcanization mold is installed.

その後、予め中心位置に鉛プラグ１０の直径と略々同一の孔径と、鋼板位置決め用ピン２４、２５に対応する位置に該ピン２４、２５と略々同一の孔径が型抜きされ、所定の厚みに調整された未加硫ゴム板４ａを、成型用中心ピン２２と鋼板位置決め用ピン２４、２５に貫通させ、下側フランジプレート８の上面に載置する。 Thereafter, a substantially identical pore size and the diameter of the lead plug 10, substantially the same pore size and the pin 24, 25 at positions corresponding to the steel plate positioning pins 24 and 25 are stamped in advance the center position, a predetermined thickness The unvulcanized rubber plate 4 a adjusted to the above is passed through the molding center pin 22 and the steel plate positioning pins 24 and 25 and placed on the upper surface of the lower flange plate 8.

次に、予め中心位置に鉛プラグ１０の直径より拡径された大きさの孔５ｃが加工され、鋼板位置決め用ピン２４、２５に対応する位置に該ピン２４、２５と略々同一の孔加工がされ、ゴム層４と接触する範囲に接着処理がされた補強板５ｂを、成型用中心ピン２２と鋼板位置決め用ピン２４、２５に貫通させ、未加硫ゴム板４ａの上面に載置する。 Next, a hole 5c having a diameter larger than the diameter of the lead plug 10 is processed in advance at the center position, and the hole processing substantially the same as the pins 24 and 25 is performed at positions corresponding to the steel plate positioning pins 24 and 25. The reinforcing plate 5b that has been subjected to the adhesion treatment within the range in contact with the rubber layer 4 is passed through the molding center pin 22 and the steel plate positioning pins 24 and 25, and placed on the upper surface of the unvulcanized rubber plate 4a. .

次に、成型用中心ピン２２と拡径された孔５ｃとの間に未加硫ゴム材料２７を充填した後、未加硫ゴム板４ａと補強板５を順次必要枚数だけ積層する。そして、上側フランジプレート７（図１参照）の近傍の中心孔が拡径された補強板５ａ（図１参照）と成型用中心ピン２２との間を、以下図示を省略するが、下側と同様に未加硫ゴム材料を充填し、さらに未加硫ゴム板と上側フランジプレート７を載置し、その後加硫成型用金型の上板（不図示）を載置する。 Next, after filling the unvulcanized rubber material 27 between the molding center pin 22 and the expanded diameter hole 5c, the necessary number of unvulcanized rubber plates 4a and reinforcing plates 5 are sequentially laminated. And between the reinforcing plate 5a (see FIG. 1) whose diameter of the central hole in the vicinity of the upper flange plate 7 (see FIG. 1) is enlarged and the molding center pin 22 is not shown, Similarly, an unvulcanized rubber material is filled, and further, an unvulcanized rubber plate and an upper flange plate 7 are placed, and thereafter an upper plate (not shown) of a vulcanization mold is placed.

上記積層工程後、加硫成型用金型を成型用プレス機（不図示）に入れ、バンピング作業を経て、加圧・加温による加硫成型工程を行い、未加硫ゴム板４ａと各補強板５とを一体化する。 After the laminating step, the vulcanization mold is placed in a molding press (not shown), subjected to a bumping operation, and a vulcanization molding step by pressurization / heating is performed, and the unvulcanized rubber plate 4a and each reinforcement The plate 5 is integrated.

所定時間経過後、加硫成型用金型を脱型し、成型用中心ピン２２及び鋼板位置決め用ピン２４、２５を抜き、フランジプレート７、８の近傍の補強板５ａ、５ｂの鉛プラグ挿入用孔５ｃの径が、中間部の補強板５の鉛プラグ挿入用孔径より大きいことを特徴とし、中心位置に鉛プラグ１０の直径と略々同一の直径を有する貫通孔９を備えた積層ゴム体６を得ることができる（図５（ａ）参照）。 After a predetermined time has elapsed, the mold for vulcanization molding is removed, the molding center pin 22 and the steel plate positioning pins 24, 25 are removed, and lead plugs are inserted into the reinforcing plates 5a, 5b near the flange plates 7, 8. The diameter of the hole 5c is larger than the diameter of the lead plug insertion hole of the intermediate reinforcing plate 5, and a laminated rubber body provided with a through hole 9 having a diameter substantially the same as the diameter of the lead plug 10 at the center position. 6 can be obtained (see FIG. 5A).

上記加硫成型工程により加硫した後、十分冷却してから、図５（ｂ）に示すように、下側フランジプレート８の凹部８ｂに下側キャッププレート１２を溶接により固定する。次に、所定の形状に仕上げられた鉛プラグ１０を積層ゴム体１６の上方から挿入し、下側フランジプレート８の貫通孔８ａ及び貫通孔９内に落とし込む。下側フランジプレート８の貫通孔８ａの直径は、鉛プラグ１０の直径と略々同じであり、鉛プラグ１０の下端は、下側キャッププレート１２の上面に当接する。その後、上側キャッププレート１１を上側フランジプレート７の貫通孔７ａに嵌挿し、図５（ｃ）に示すように、鉛プラグ１０の上端に当接させ、上側キャッププレート１１を上側フランジプレート７の凹部７ｂに溶接により固定する。 After vulcanization by the vulcanization molding process, after sufficiently cooling, the lower cap plate 12 is fixed to the concave portion 8b of the lower flange plate 8 by welding as shown in FIG. Next, the lead plug 10 finished in a predetermined shape is inserted from above the laminated rubber body 16 and dropped into the through hole 8 a and the through hole 9 of the lower flange plate 8. The diameter of the through hole 8 a of the lower flange plate 8 is substantially the same as the diameter of the lead plug 10, and the lower end of the lead plug 10 contacts the upper surface of the lower cap plate 12. Thereafter, it fitted upper cap plate 11 to the through hole 7a of the upper flange plate 7, as shown in FIG. 5 (c), is brought into contact with the upper end of the lead plug 10, an upper cap plate 11 of the upper flange plate 7 recess 7b is fixed by welding.

尚、図２に示す鋼板位置決め用ピン２４、２５を抜いた後に形成される中空部２４ａ、２５ａは、フランジプレート７、８及び補強板５の防錆のため、積層ゴム支承体１としての変形性能に支障を及ぼさない範囲で弾性材料等を充填してもよく、またフランジプレート７、８は、上部構造物２及び下部構造物３と各々締結され、鋼板位置決め用ピン２４、２５の中空部２４ａ、２５ａは外部と遮断されるため、防錆処理等を施さずにそのままにしておいてもよい。 Note that the hollow portions 24a and 25a formed after the steel plate positioning pins 24 and 25 shown in FIG. 2 are deformed as the laminated rubber support 1 for rust prevention of the flange plates 7 and 8 and the reinforcing plate 5. An elastic material or the like may be filled as long as performance is not hindered, and the flange plates 7 and 8 are fastened to the upper structure 2 and the lower structure 3, respectively, and the hollow portions of the steel plate positioning pins 24 and 25. Since 24a and 25a are cut off from the outside, they may be left without being subjected to rust prevention treatment or the like.

次に、上記のようにして製造された積層ゴム支承体１の動作について、図１及び図６を参照しながら説明する。 Next, the operation of the laminated rubber support 1 manufactured as described above will be described with reference to FIGS.

図１（ａ）に示すように、上部構造物２と下部構造物３との間に配された積層ゴム支承体１が、図６（ａ）に示すように、地震等の外乱により上部構造物２と下部構造物３との水平相対変位によりせん断変形を生じると、積層ゴム支承体１の鉛プラグ１０がせん断変形し、水平方向の振動を吸収する。ここで、本発明では、フランジプレート７、８の近傍の補強板５ａ、５ｂの鉛プラグ挿入用孔の内周面と、鉛プラグ１０の外周面との間の領域に緩衝部材１４を配したため、図６（ｂ）に示すように、鉛プラグ１０と補強板５ａ（５ｂは図示を省略）とが緩衝部材１４を挟んで互いに離間した状態を維持することができ、鉛プラグ１０と補強板５ａ、５ｂとの境界部分に応力が集中することがなく、応力集中による該領域の損傷を防止することができる。 As shown in FIG. 1 (a), the laminated rubber bearing body 1 disposed between the upper structure 2 and the lower structure 3 has an upper structure due to disturbance such as an earthquake as shown in FIG. 6 (a). When shear deformation occurs due to the horizontal relative displacement between the object 2 and the lower structure 3, the lead plug 10 of the laminated rubber bearing body 1 shears and absorbs horizontal vibration. Here, in the present invention, the buffer member 14 is disposed in the region between the inner peripheral surface of the lead plug insertion hole of the reinforcing plates 5 a and 5 b near the flange plates 7 and 8 and the outer peripheral surface of the lead plug 10. As shown in FIG. 6B, the lead plug 10 and the reinforcing plate 5a (5b is not shown) can be kept separated from each other with the buffer member 14 interposed therebetween. The stress is not concentrated at the boundary between 5a and 5b, and the damage of the region due to the stress concentration can be prevented.

次に、本発明にかかる積層ゴム支承体の第２の実施の形態について、図７及び図８を参照しながら説明する。尚、図８は、図７に示した積層ゴム支承体３１の積層ゴム体３６を示す斜視図であって、鉛プラグ４７が挿入される前の状態を示す。この積層ゴム体３６も、上記積層ゴム体１６と同様の製造方法で製造することができ、図８に示すように、積層ゴム体３６には、鋼板位置決め用ピン跡４８と、鉛プラグ４７を挿入するための貫通孔５０が形成されている。 Next, a second embodiment of the laminated rubber support according to the present invention will be described with reference to FIGS. FIG. 8 is a perspective view showing the laminated rubber body 36 of the laminated rubber support 31 shown in FIG. 7, and shows a state before the lead plug 47 is inserted. The laminated rubber body 36 can also be manufactured by the same manufacturing method as the laminated rubber body 16. As shown in FIG. 8, the laminated rubber body 36 has a steel plate positioning pin mark 48 and a lead plug 47. A through hole 50 for insertion is formed.

この積層ゴム支承体３１は、いわゆるボルト固定型であって、ゴム層３４と補強板３５とが交互に積層され、上下に厚肉鋼板３９、４０を有する積層ゴム体３６と、上下構造物３２、３３に各々取り付けられる取付用鋼板３７、３８と、取付用鋼板３７、３８と厚肉鋼板３９、４０との間で水平力を伝達するとともに、弾塑性金属材料プラグ（鉛プラグ）４７を封入するために備えられたせん断キー４１、４２と、取付用鋼板３７、３８と厚肉鋼板３９、４０とを緊結するボルト４３（図８にその螺合穴を示すように、全部で１６本）と、ボルト４４（ボルト４３と同数）と、ボルト４３、４４と各々螺合するねじ穴４３’（ボルト４４と螺合するねじ穴の図示は省略）とで構成される。尚、以下の説明でも、弾塑性金属材料として鉛を用いるものとする。 The laminated rubber support 31 is a so-called bolt fixing type, in which rubber layers 34 and reinforcing plates 35 are alternately laminated, a laminated rubber body 36 having thick steel plates 39 and 40 above and below, and an upper and lower structure 32. , 33 are attached to the mounting steel plates 37, 38, and the horizontal force is transmitted between the mounting steel plates 37, 38 and the thick steel plates 39, 40, and an elastoplastic metal material plug (lead plug) 47 is enclosed. The bolts 43 for fastening the shear keys 41, 42, the mounting steel plates 37, 38 and the thick steel plates 39, 40 (16 in total as shown in FIG. 8). And bolts 44 (the same number as the bolts 43) and screw holes 43 '(not shown for screw holes screwed into the bolts 44) screwed into the bolts 43 and 44, respectively. In the following description, lead is used as the elastic-plastic metal material.

この構成を有する積層ゴム支承体３１は、積層ゴム体３６に厚肉鋼板３９、４０が設けられ、厚肉鋼板３９、４０が取付用鋼板３７、３８とせん断キー４１、４２を介して連結されていることが、第１の実施の形態と異なる。 In the laminated rubber support 31 having this configuration, thick steel plates 39 and 40 are provided on the laminated rubber body 36, and the thick steel plates 39 and 40 are connected to the mounting steel plates 37 and 38 via shear keys 41 and 42. This is different from the first embodiment.

本実施の形態においても、積層ゴム体３６の厚肉鋼板３９、４０の近傍の補強板３５ａ、３５ｂに穿設された鉛プラグ挿入用孔の径Ｄ’は、中間部の補強板３５に穿設された鉛プラグ挿入用孔の径Ｄ（鉛プラグ４７の外径と略々等しい）よりも大きく形成され、補強板３５ａ、３５ｂの鉛プラグ挿入用孔の内周面と、鉛プラグ４７の外周面との間には、ゴム層３４と同一の材料で形成した緩衝部材４６を配する。 Also in this embodiment, the diameter D ′ of the lead plug insertion hole formed in the reinforcing plates 35a and 35b in the vicinity of the thick steel plates 39 and 40 of the laminated rubber body 36 is formed in the intermediate reinforcing plate 35. It is formed larger than the diameter D of the lead plug insertion hole provided (substantially equal to the outer diameter of the lead plug 47), the inner peripheral surface of the lead plug insertion hole of the reinforcing plates 35a and 35b, and the lead plug 47 A buffer member 46 made of the same material as that of the rubber layer 34 is disposed between the outer peripheral surface.

上部構造物３２と下部構造物３３の間に配された積層ゴム支承体３１が、地震等の外乱により上部構造物３２と下部構造物３３の水平相対変位によりせん断変形を生じると、積層ゴム支承体３１の鉛プラグ４７がせん断変形し、水平方向の振動を吸収する。ここで、本実施の形態では、厚肉鋼板３９、４０の近傍の補強板３５ａ、３５ｂの鉛プラグ挿入用孔の内周面と、鉛プラグ４７の外周面との間の領域に緩衝部材４６を配したため、第１の実施形態と同様に、鉛プラグ４７と補強板３５ａ、３５ｂとが緩衝部材４６を挟んで互いに離間した状態を維持することができ、鉛プラグ４７と補強板３５ａ、３５ｂとの境界部分に応力が集中することがなく、応力集中による該領域の損傷を防止することができる。 When the laminated rubber bearing 31 disposed between the upper structure 32 and the lower structure 33 is sheared due to horizontal relative displacement between the upper structure 32 and the lower structure 33 due to a disturbance such as an earthquake, the laminated rubber bearing is supported. The lead plug 47 of the body 31 undergoes shear deformation and absorbs horizontal vibration. Here, in the present embodiment, the buffer member 46 is provided in a region between the inner peripheral surface of the lead plug insertion hole of the reinforcing plates 35 a and 35 b near the thick steel plates 39 and 40 and the outer peripheral surface of the lead plug 47. Therefore, as in the first embodiment, the lead plug 47 and the reinforcing plates 35a and 35b can be kept separated from each other with the buffer member 46 interposed therebetween, and the lead plug 47 and the reinforcing plates 35a and 35b can be maintained. The stress is not concentrated on the boundary portion between the two and the region can be prevented from being damaged by the stress concentration.

以上のように、本発明による積層ゴム支承体は、積層ゴム体内径部のフランジプレート又は厚肉鋼板（以下「フランジプレート等」という）の近傍の補強板と、挿入される鉛プラグとの間に緩衝部材が配されるため、フランジプレート等の近傍の補強板とゴム層の間に生じる鉛プラグの過大な食い込み、及び補強板とゴム層間の接着面への侵入を好ましく防止でき、履歴性能の安定化並びに耐久性に優れるほか、地震等の外乱が生じ、積層ゴム支承体に水平せん断変形が生じた場合において、該緩衝部材周辺の変形作用により初期剛性を低くすることができ、比較的小さな地震においても上部構造物の固有周期を好適に伸ばし、上部構造物の応答を低減することが可能となる。 As described above, the laminated rubber bearing according to the present invention is provided between the reinforcing plate in the vicinity of the flange plate or the thick steel plate (hereinafter referred to as “flange plate etc.”) and the lead plug to be inserted. Since the buffer member is arranged on the top, it is possible to preferably prevent excessive penetration of the lead plug between the reinforcing plate in the vicinity of the flange plate etc. and the rubber layer and intrusion into the adhesive surface between the reinforcing plate and the rubber layer, and the hysteresis performance. In addition to being excellent in stabilization and durability, when a disturbance such as an earthquake occurs and horizontal shear deformation occurs in the laminated rubber bearing body, the initial rigidity can be lowered by the deformation action around the buffer member, Even in a small earthquake, it is possible to suitably extend the natural period of the superstructure and reduce the superstructure response.

前記フランジプレート等の近傍の補強板の円柱状鉛プラグ挿入用孔径を、どの程度拡径するかは、積層ゴムの一つの層の厚みと補強板の厚みによって適宜変更できるが、概ね、中間部の補強板の円柱状鉛プラグ挿入用孔径より、直径において、フランジプレート等の近傍の補強板と接するゴム層の厚みの２０％から３０％大きくすることで、鉛プラグがフランジプレート等の近傍のゴム層に食い込むのを効果的に防止することが可能となる。 How much the diameter of the hole for inserting the cylindrical lead plug of the reinforcing plate in the vicinity of the flange plate or the like can be appropriately changed according to the thickness of one layer of the laminated rubber and the thickness of the reinforcing plate, By increasing the diameter of the rubber layer in contact with the reinforcing plate in the vicinity of the flange plate or the like by 20% to 30% larger than the diameter of the cylindrical lead plug insertion hole of the reinforcing plate, the lead plug is in the vicinity of the flange plate or the like. It is possible to effectively prevent biting into the rubber layer.

また、前記円柱状鉛プラグの挿入用孔径を大きくしたフランジプレート等の近傍の補強板は、上下各々の厚肉鋼板から２枚程度内側に配するだけでよく、特別大きな水平変形量が想定される積層ゴム支承体であれば、その枚数を増やしてもよく、また水平変形量が小さく設計される積層ゴム支承体、換言すれば安全率が高く設計された積層ゴム支承体では１枚でもよい。 In addition, the reinforcing plate in the vicinity of the flange plate or the like having a large insertion hole diameter for the cylindrical lead plug need only be arranged on the inner side of each of the upper and lower thick steel plates, and a particularly large amount of horizontal deformation is assumed. The number of the laminated rubber bearings may be increased, or the number of the laminated rubber bearings designed to have a small horizontal deformation amount, in other words, the laminated rubber bearing body designed with a high safety factor may be one. .

また、上記積層ゴム支承体において、前記各々のフランジプレート等の近傍の補強板と接するゴム層の、該補強板の略々内径位置から鉛プラグの外周面までの範囲と、前記緩衝部材のゴム材料を、他のゴム層部分のゴム硬度より高いゴム材料とすることができ、かつ該他のゴム層と一体的に加硫成型することができる。 Further, in the laminated rubber bearing, a range of a rubber layer in contact with a reinforcing plate in the vicinity of each of the flange plates, etc., from an approximately inner diameter position of the reinforcing plate to an outer peripheral surface of the lead plug, and a rubber of the buffer member The material can be a rubber material having a rubber hardness higher than that of the other rubber layer portion, and can be vulcanized and molded integrally with the other rubber layer.

さらに、上記積層ゴム支承体において、前記各々のフランジプレート等の近傍の補強板と接するゴム層の、該補強板の略々内径位置から鉛プラグの外周面までの範囲と、前記緩衝部材のゴム材料を天然ゴム材料とし、他のゴム層部分のゴム材料を高減衰性ゴム材料とすることができる。 Further, in the laminated rubber bearing, a range of a rubber layer in contact with a reinforcing plate in the vicinity of each of the flange plates and the like from a substantially inner diameter position of the reinforcing plate to an outer peripheral surface of the lead plug, and a rubber of the buffer member The material can be a natural rubber material, and the rubber material of the other rubber layer portion can be a high damping rubber material.

本発明にかかる積層ゴム支承体の第１の実施形態を示す図であって、（ａ）は断面図、（ｂ）は拡大断面図である。It is a figure which shows 1st Embodiment of the laminated rubber bearing body concerning this invention, Comprising: (a) is sectional drawing, (b) is an expanded sectional view. 図１の積層ゴム支承体の積層ゴム体を示す図であって、（ａ）は平面図、（ｂ）は（ａ）のＡ−Ａ線断面図である。It is a figure which shows the laminated rubber body of the laminated rubber support body of FIG. 1, Comprising: (a) is a top view, (b) is the sectional view on the AA line of (a). 図１の積層ゴム支承体のフランジプレートを示す図であって、（ａ）は平面図、（ｂ）は（ａ）のＢ−Ｂ線断面図である。It is a figure which shows the flange plate of the laminated rubber bearing body of FIG. 1, Comprising: (a) is a top view, (b) is the BB sectional drawing of (a). 図１の積層ゴム支承体の製造方法を説明するための分解断面図である。FIG. 2 is an exploded cross-sectional view for explaining a method for manufacturing the laminated rubber bearing body of FIG. 1. 図１の積層ゴム支承体の製造方法を説明するための断面図である。It is sectional drawing for demonstrating the manufacturing method of the laminated rubber bearing body of FIG. 図１の積層ゴム支承体の動作を説明するための図であって、（ａ）は断面図、（ｂ）は拡大断面図である。It is a figure for demonstrating operation | movement of the laminated rubber support body of FIG. 1, Comprising: (a) is sectional drawing, (b) is an expanded sectional view. 本発明にかかる積層ゴム支承体の第２の実施形態を示す断面図である。It is sectional drawing which shows 2nd Embodiment of the laminated rubber bearing body concerning this invention. 図６の積層ゴム支承体の積層ゴム体を示す斜視図である。It is a perspective view which shows the laminated rubber body of the laminated rubber support body of FIG.

符号の説明Explanation of symbols

１積層ゴム支承体
２上部構造物
３下部構造物
４ゴム層
４ａ未加硫ゴム板
５補強板
５ａ、５ｂ（フランジプレート近傍の）補強板
５ｃ孔
６積層ゴム部
７上側フランジプレート
７ａ貫通孔
７ｂ凹部
８下側フランジプレート
８ａ貫通孔
８ｂ凹部
９貫通孔
１０弾塑性金属材料プラグ（鉛プラグ）
１１上側キャッププレート
１２下側キャッププレート
１４緩衝部材
１６積層ゴム体
２０筒体
２１下板
２１ａ〜２１ｃ凹部
２２成型用中心ピン
２４鋼板位置決め用ピン
２４ａ中空部
２５鋼板位置決め用ピン
２５ａ中空部
２７未加硫ゴム材料
３１積層ゴム支承体
３２上部構造物
３３下部構造物
３４ゴム層
３５補強板
３５ａ、３５ｂ（厚肉鋼板近傍の）補強板
３６積層ゴム体
３７上側取付用鋼板
３８下側取付用鋼板
３９上側厚肉鋼板
４０下側厚肉鋼板
４１上側せん断キー
４２下側せん断キー
４３ボルト
４３’ ねじ穴
４４ボルト
４６緩衝部材
４７弾塑性金属材料プラグ（鉛プラグ）
４８鋼板位置決め用ピン跡
５０貫通孔 DESCRIPTION OF SYMBOLS 1 Laminated rubber support body 2 Upper structure 3 Lower structure 4 Rubber layer 4a Unvulcanized rubber plate 5 Reinforcement plate 5a, 5b Reinforcement plate 5c (near the flange plate) Hole 6 Laminated rubber part 7 Upper flange plate 7a Through hole 7b Recess 8 Lower flange plate 8a Through hole 8b Recess 9 Through hole 10 Elasto-plastic metal plug (lead plug)
11 Upper cap plate 12 Lower cap plate 14 Buffer member 16 Laminated rubber body 20 Cylindrical body 21 Lower plates 21a to 21c Recess 22 Molding center pin 24 Steel plate positioning pin 24a Hollow portion 25 Steel plate positioning pin 25a Hollow portion 27 Not added Rubber rubber material 31 Laminated rubber support body 32 Upper structure 33 Lower structure 34 Rubber layer 35 Reinforcement plates 35a, 35b Reinforcement plate 36 (in the vicinity of thick steel plate) Laminated rubber body 37 Upper mounting steel plate 38 Lower mounting steel plate 39 Upper thick steel plate 40 Lower thick steel plate 41 Upper shear key 42 Lower shear key 43 Bolt 43 'Screw hole 44 Bolt 46 Buffer member 47 Elasto-plastic metal material plug (lead plug)
48 Steel plate positioning pin mark 50 Through hole

Claims

ゴム層と補強板とを交互に積層した積層ゴム部の上下端面に各々フランジプレートが接合されて形成され、前記フランジプレート及び前記積層ゴム部に上下方向に貫通する貫通孔を有する積層ゴム体と、該貫通孔に封入された円柱状の弾塑性金属材料プラグとを備える積層ゴム支承体において、
前記各々のフランジプレートの近傍の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径が、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径よりも大きく、
前記各々のフランジプレートの近傍の補強板の弾塑性金属材料プラグ挿入用孔の内周面と、前記弾塑性金属材料プラグの外周面との間に、ゴム材料からなる緩衝部材が配され、前記フランジプレートに穿設された貫通孔と、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔は同径に形成されていることを特徴とする積層ゴム支承体。 A laminated rubber body formed by joining flange plates to upper and lower end surfaces of laminated rubber portions in which rubber layers and reinforcing plates are alternately laminated, and having through holes penetrating vertically in the flange plates and the laminated rubber portions; In a laminated rubber bearing comprising a cylindrical elastic-plastic metal material plug enclosed in the through-hole,
The diameter of the elastic-plastic metal material plug insertion hole drilled in the reinforcing plate in the vicinity of each flange plate is larger than the diameter of the elastic-plastic metal material plug insertion hole drilled in the middle reinforcing plate. ,
And the inner peripheral surface of the elastic-plastic metal material plug insertion hole of the reinforcement plate in the vicinity of each of said flange plates, between the outer peripheral surface of the elastic-plastic metal material plugs, is arranged, a buffer member made of a rubber material, wherein A laminated rubber bearing , wherein a through-hole formed in the flange plate and an elastic-plastic metal material plug insertion hole formed in the intermediate reinforcing plate are formed to have the same diameter .

上下構造物の各々に取り付けられる取付用鋼板と、
ゴム層と補強板とを交互に積層した積層ゴム部の上下端面に各々、前記取付用鋼板の各々と緊結される厚肉鋼板が配されて形成され、該厚肉鋼板及び前記積層ゴム部に上下方向に貫通する貫通孔を有する積層ゴム体と、該貫通孔に封入された円柱状の弾塑性金属材料プラグとを備える積層ゴム支承体において、
前記各々の厚肉鋼板の近傍の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径が、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔の径よりも大きく、
前記各々の厚肉鋼板の近傍の補強板の弾塑性金属材料プラグ挿入用孔の内周面と、前記弾塑性金属材料プラグの外周面との間に、ゴム材料からなる緩衝部材が配され、
前記厚肉鋼板に穿設された貫通孔と、中間部の補強板に穿設された弾塑性金属材料プラグ挿入用孔は同径に形成されていることを特徴とする積層ゴム支承体。 A mounting steel plate attached to each of the upper and lower structures;
The upper and lower end surfaces of the laminated rubber portions in which the rubber layers and the reinforcing plates are alternately laminated are respectively formed by forming thick steel plates that are tightly coupled with the respective mounting steel plates, and the thick steel plates and the laminated rubber portions are formed. In a laminated rubber bearing comprising a laminated rubber body having a through-hole penetrating in the vertical direction and a cylindrical elastic-plastic metal material plug enclosed in the through-hole,
The diameter of the elastic-plastic metal material plug insertion hole drilled in the reinforcing plate in the vicinity of each thick steel plate is larger than the diameter of the elastic-plastic metal material plug insertion hole drilled in the middle reinforcing plate. big,
A buffer member made of a rubber material is disposed between the inner peripheral surface of the elastic-plastic metal material plug insertion hole of the reinforcing plate in the vicinity of each thick steel plate and the outer peripheral surface of the elastic-plastic metal material plug ,
A laminated rubber bearing, wherein the through-hole formed in the thick steel plate and the elastic-plastic metal material plug insertion hole formed in the intermediate reinforcing plate are formed to have the same diameter .

前記緩衝部材が前記ゴム層と同一の材料からなり、かつ前記ゴム層と一体的に加硫成型されていることを特徴とする請求項１又は２に記載の積層ゴム支承体。 The laminated rubber bearing body according to claim 1 or 2, wherein the buffer member is made of the same material as the rubber layer and is integrally vulcanized and molded with the rubber layer.

前記各々のフランジプレートの近傍の補強板と接するゴム層の、該補強板の略々内径位置から弾塑性金属材料プラグの外周面までの範囲と、前記緩衝部材のゴム材料が、他のゴム層部分のゴム硬度より高いゴム材料からなり、かつ該他のゴム層と一体的に加硫成型されていることを特徴とする請求項１に記載の積層ゴム支承体。 Of the rubber layer in contact with the reinforcing plate in the vicinity of the flange plates of the respective, and ranges from approximately the inner diameter position of the reinforcing plate to the outer peripheral surface of the elastic-plastic metal material plug, a rubber material of the cushioning member, other rubber The laminated rubber bearing body according to claim 1 , wherein the laminated rubber bearing body is made of a rubber material having a higher layer layer rubber hardness and is integrally vulcanized and molded with the other rubber layer.

前記各々の厚肉鋼板の近傍の補強板と接するゴム層の、該補強板の略々内径位置から弾塑性金属材料プラグの外周面までの範囲と、前記緩衝部材のゴム材料が、他のゴム層部分のゴム硬度より高いゴム材料からなり、かつ該他のゴム層と一体的に加硫成型されていることを特徴とする請求項２に記載の積層ゴム支承体。 The reinforcing plate in contact with the rubber layer in the vicinity of the thick steel plate before SL respectively, and ranges from approximately the inner diameter position of the reinforcing plate to the outer peripheral surface of the elastic-plastic metal material plug, a rubber material of the cushioning member, the other The laminated rubber bearing body according to claim 2 , wherein the laminated rubber bearing body is made of a rubber material having a rubber hardness higher than that of the rubber layer portion and is integrally vulcanized and molded with the other rubber layer.

前記各々のフランジプレートの近傍の補強板と接するゴム層の、該補強板の略々内径位置から弾塑性金属材料プラグの外周面までの範囲と、前記緩衝部材のゴム材料が天然ゴム材料で、他のゴム層部分のゴム材料が高減衰性ゴム材料からなることを特徴とする請求項１に記載の積層ゴム支承体。 Of the rubber layer in contact with the reinforcing plate in the vicinity of the flange plates of the respective, and ranges from approximately the inner diameter position of the reinforcing plate to the outer peripheral surface of the elastic-plastic metal material plug, a rubber material of the cushioning member is natural rubber material 2. The laminated rubber support according to claim 1, wherein the rubber material of the other rubber layer portion is made of a high damping rubber material.

前記各々の厚肉鋼板の近傍の補強板と接するゴム層の、該補強板の略々内径位置から弾塑性金属材料プラグの外周面までの範囲と、前記緩衝部材のゴム材料が天然ゴム材料で、他のゴム層部分のゴム材料が高減衰性ゴム材料からなることを特徴とする請求項２に記載の積層ゴム支承体。 Of the rubber layer in contact with the reinforcing plate in the vicinity of the thick steel plate before SL respectively, and ranges from approximately the inner diameter position of the reinforcing plate to the outer peripheral surface of the elastic-plastic metal material plugs, rubber material natural rubber material of the cushioning member 3. The laminated rubber support according to claim 2 , wherein the rubber material of the other rubber layer portion is made of a high damping rubber material.

前記弾塑性金属材料プラグが、鉛、錫、又はそれらの合金からなることを特徴とする請求項１乃至７のいずれかに記載の積層ゴム支承体。 The laminated rubber bearing body according to any one of claims 1 to 7 , wherein the elastic-plastic metal material plug is made of lead, tin, or an alloy thereof.