JP4561424B2 - Elastic bearing for bridge - Google Patents

Elastic bearing for bridge Download PDF

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JP4561424B2
JP4561424B2 JP2005085558A JP2005085558A JP4561424B2 JP 4561424 B2 JP4561424 B2 JP 4561424B2 JP 2005085558 A JP2005085558 A JP 2005085558A JP 2005085558 A JP2005085558 A JP 2005085558A JP 4561424 B2 JP4561424 B2 JP 4561424B2
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bridge
plate
locking
bridge girder
flange plate
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JP2006265936A (en
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小島  隆
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Description

本発明は、例えば橋桁を橋脚に鉛直方向に支持する他の支承とともに設けられ、橋桁を橋脚に対して水平方向に弾性支持するための橋梁用弾性支承に関するものである。   The present invention relates to an elastic bearing for a bridge which is provided together with another support for supporting a bridge girder in a vertical direction on a pier, for example, and elastically supports the bridge girder in a horizontal direction with respect to the pier.

一般に、この種の橋梁用弾性支承は、図8に示すように複数の補強板71とゴム部材72とを交互に積層してなる弾性部材70を備えているため、活荷重によって橋桁80に回転方向(図示した矢印の方向)の力が加わり弾性部材70が回転方向に変形すると、回転方向外側における各補強板71の間のゴム部材72が引張方向に変形する。また、ゴム部材72の変形は弾性部材70の水平方向の幅寸法とともに大きくなり、ゴム部材72の引張方向への大きな変形が弾性部材70の強度を低下させる要因となるので、橋桁80に回転方向の力が加わっても弾性部材70が回転方向に変形しないようにすることにより、弾性部材70の強度維持を図ることができる。   Generally, this type of bridge elastic bearing includes an elastic member 70 in which a plurality of reinforcing plates 71 and rubber members 72 are alternately laminated as shown in FIG. When a force in the direction (the direction of the arrow shown) is applied and the elastic member 70 is deformed in the rotational direction, the rubber member 72 between the reinforcing plates 71 on the outer side in the rotational direction is deformed in the tensile direction. Further, the deformation of the rubber member 72 increases with the horizontal dimension of the elastic member 70, and the large deformation in the tensile direction of the rubber member 72 causes the strength of the elastic member 70 to decrease. By preventing the elastic member 70 from being deformed in the rotational direction even when this force is applied, the strength of the elastic member 70 can be maintained.

このような橋梁用弾性支承としては、下端部が橋脚に取付けられるとともに上端部にフランジプレートが設けられた弾性部材と、橋桁の下面に取付けられ、フランジプレートの橋軸直角方向の両端部に水平方向及び下方から係止可能に形成されるとともに、フランジプレートの上面及び前記両端部と所定の隙間を設けて形成された係止プレートとを備え、風などにより橋脚に対して橋桁が橋軸直角方向に移動する場合には、係止プレートがフランジプレートに橋軸直角方向に係止することにより、弾性部材が剪断変形しながら橋脚を橋軸直角方向に支持し、活荷重などにより橋桁に回転方向の力が加わる場合には、前記隙間によってフランジプレートと係止プレートとが係止せず、弾性部材が回転方向に変形しないようにしたものが知られている(例えば、特許文献1参照。)。
特開2002−38418号公報
As such an elastic bearing for a bridge, an elastic member having a lower end attached to a bridge pier and a flange plate provided at the upper end and an underside of a bridge girder and horizontally attached to both ends of the flange plate in a direction perpendicular to the bridge axis. It is formed so that it can be locked from the direction and from below, and it has a locking plate formed with a predetermined gap from the upper surface of the flange plate and both ends, and the bridge girder is perpendicular to the bridge pier by wind etc. When moving in the direction, the locking plate locks to the flange plate in the direction perpendicular to the bridge axis, so that the elastic member supports the bridge pier in the direction perpendicular to the bridge axis while shearing, and rotates to the bridge girder by live load etc. When the direction force is applied, it is known that the flange plate and the locking plate are not locked by the gap and the elastic member is not deformed in the rotation direction. That (for example, see Patent Document 1.).
JP 2002-38418 A

しかしながら、前記橋梁用弾性支承では、係止プレートがフランジプレートに係止することにより橋桁を水平方向に支持するようにしているので、突風などによって橋桁に大きな力が加わって係止プレートとフランジプレートとが係止する場合には、係止部から大きな騒音が発生するという問題点があった。   However, in the elastic bridge support, the locking plate is supported by the flange plate so that the bridge girder is supported in the horizontal direction. Therefore, a large force is applied to the bridge girder due to a gust of wind, and the locking plate and the flange plate. Has a problem that a large noise is generated from the locking portion.

本発明は前記問題点に鑑みてなされたものであり、その目的とするところは、支持体に対して橋桁を水平方向に弾性支持することができるとともに、橋桁に加わる回転方向の力によって弾性部材が回転方向に変形することがなく、しかも橋桁を水平方向に支持する際に騒音が発生することのない橋梁用弾性支承を提供することにある。   The present invention has been made in view of the above-described problems, and an object of the present invention is to elastically support the bridge girder in the horizontal direction with respect to the support and to elastic member by the rotational force applied to the bridge girder. It is an object of the present invention to provide an elastic bearing for a bridge that is not deformed in the rotational direction and that does not generate noise when the bridge girder is supported in the horizontal direction.

本発明は前記目的を達成するために、橋桁と橋桁を支持する支持体との間に橋桁を鉛直方向に支持する他の支承とともに設けられ、橋桁を支持体に対して水平方向に弾性支持する橋梁用弾性支承において、下端部側が支持体に固定されるとともに、上端部にフランジプレートが設けられ、水平方向に弾性変形可能な弾性部材と、橋桁に固定され、フランジプレートの橋軸直角方向及び橋軸方向の両端部に水平方向及び下方から係止可能に形成されるとともに、フランジプレートの上面及び前記各両端部と所定の隙間を設けて形成され、下面に凹状部が設けられた係止プレートとを備え、フランジプレートに上下方向の孔を設けるとともに、該孔に上下方向に挿入されたキー部材を設け、キー部材の上端部が係止プレートの凹状部内に挿入されるとともに、係止プレートの凹状部とキー部材の上端部との間に水平方向及び上下方向に所定の隙間が設けられるように構成し、フランジプレートの前記各両端部と係止プレートとの隙間に緩衝部材を設けている。 In order to achieve the above object, the present invention is provided with a bridge girder and another support for supporting the bridge girder in the vertical direction between the bridge girder and the support for supporting the bridge girder, and elastically supports the bridge girder in the horizontal direction with respect to the support. in bridges elastic support, together with the lower end is fixed to a support, the flange plate is provided at the upper end, and a horizontally elastically deformable elastic members are secured to the bridge girder, bridge axis perpendicular direction and the flange plate Locking that is formed at both ends in the bridge axis direction so as to be able to be locked from the horizontal direction and from below, and that is formed with a predetermined gap from the upper surface of the flange plate and each of the both ends, and provided with a concave portion on the lower surface. and a plate, provided with a vertical hole in the flange plate is provided with inserted key member in the vertical direction in the hole, the upper end portion of the key member is inserted into the recess of the locking plate Together, the gap between the horizontal and vertical direction and configured so that a predetermined clearance is provided, wherein each of both end portions of the flange plate and the locking plate between the upper end portion of the concave portion and the key member of the locking plate A buffer member is provided.

これにより、係止プレートがフランジプレートの前記各両端部に水平方向及び下方から係止可能に形成されていることから、橋桁が支持体に対して水平方向に移動する場合には、係止プレートがフランジプレートに水平方向に係止するとともに係止プレートによってフランジプレートの下方への移動が規制され、弾性部材が水平方向に弾性変形する。また、係止プレートがフランジプレートの上面及び前記各両端部と所定の隙間を設けて形成されていることから、活荷重などにより橋桁に回転方向の力が加わっても、前記隙間によって係止プレートがフランジプレートに係止しない。この際、キー部材と係止プレートの凹状部との間には水平方向及び上下方向に所定の隙間が設けられているので、キー部材を介してフランジプレートに回転方向の力が加わることがない。さらに、フランジプレートの前記各両端部と係止プレートとの隙間に緩衝部材が設けられていることから、係止プレートがフランジプレートの前記各両端部に係止する際の衝撃力が緩衝部材によって緩和される。 Thereby, since the locking plate is formed so as to be able to be locked from both the horizontal direction and the lower side at the both ends of the flange plate, when the bridge girder moves in the horizontal direction with respect to the support body, the locking plate Is locked to the flange plate in the horizontal direction, and the downward movement of the flange plate is restricted by the lock plate, and the elastic member is elastically deformed in the horizontal direction. Further, since the locking plate is formed with a predetermined gap from the upper surface of the flange plate and the both end portions, even if a rotational force is applied to the bridge girder due to a live load or the like, the locking plate Does not lock onto the flange plate. At this time, since a predetermined gap is provided in the horizontal direction and the vertical direction between the key member and the recessed portion of the locking plate, no force in the rotational direction is applied to the flange plate via the key member. . Further, since the buffer member is provided in the gap between the both end portions of the flange plate and the locking plate, the shock force when the locking plate is locked to the both end portions of the flange plate is caused by the buffer member. Alleviated.

また、本発明は、橋桁と橋桁を支持する支持体との間に橋桁を鉛直方向に支持する他の支承とともに設けられ、橋桁を支持体に対して水平方向に弾性支持する橋梁用弾性支承において、下端部側が支持体に固定されるとともに、上端部にフランジプレートが設けられ、水平方向に弾性変形可能な弾性部材と、橋桁に固定され、フランジプレートの橋軸方向及び橋軸直角方向のうち一方向の両端部に水平方向及び下方から係止可能に形成されるとともに、フランジプレートの上面及び前記両端部と所定の隙間を設けて形成され、下面に凹状部が設けられた係止プレートとを備え、フランジプレートに上下方向の孔を設けるとともに、該孔に上下方向に挿入されたキー部材を設け、キー部材の上端部が係止プレートの凹状部内に挿入されるとともに、係止プレートの凹状部とキー部材の上端部との間に水平方向及び上下方向に所定の隙間が設けられるように構成し、フランジプレートの前記両端部と係止プレートとの隙間に緩衝部材を設けている。 Further, the present invention provides an elastic bearing for a bridge that is provided together with another support that supports the bridge girder in the vertical direction between the bridge girder and the support that supports the bridge girder, and that elastically supports the bridge girder in the horizontal direction with respect to the support. The lower end side is fixed to the support body, and the flange plate is provided at the upper end portion. The elastic member is elastically deformable in the horizontal direction, and is fixed to the bridge girder. at both ends of the one direction while being formed so as to be locking in the horizontal direction and downward, are formed by providing the upper surface and the both end portions with a predetermined gap between the flange plates, and a locking plate concave portion is provided on the lower surface the equipped, provided with a vertical hole in the flange plate, provided the inserted key member in the vertical direction in the hole, the upper end portion of the key member is inserted into the recess of the locking plate together , Horizontal and vertical direction and configured so that a predetermined clearance is provided, the buffer member in a gap between said end portion and the locking plate flange plate between the upper end portion of the concave portion and the key member of the locking plate Is provided.

これにより、係止プレートがフランジプレートの前記両端部に所定の水平方向及び下方から係止可能に形成されていることから、橋桁が支持体に対して所定の水平方向に移動する場合には、係止プレートがフランジプレートに水平方向に係止するとともに係止プレートによってフランジプレートの下方への移動が規制され、弾性部材が水平方向に弾性変形する。また、係止プレートがフランジプレートの上面及び前記両端部と所定の隙間を設けて形成されていることから、活荷重などにより橋桁に回転方向の力が加わっても、前記隙間によってフランジプレートと係止プレートとが係止しない。この際、キー部材と係止プレートの凹状部との間には水平方向及び上下方向に所定の隙間が設けられているので、キー部材を介してフランジプレートに回転方向の力が加わることがない。さらに、フランジプレートの前記両端部と係止プレートとの隙間に緩衝部材が設けられていることから、係止プレートがフランジプレートの前記両端部に係止する際の衝撃力が緩衝部材によって緩和される。 Thereby, since the locking plate is formed to be able to be locked from the predetermined horizontal direction and below from the both ends of the flange plate, when the bridge girder moves in the predetermined horizontal direction with respect to the support body, The locking plate is locked to the flange plate in the horizontal direction, and the downward movement of the flange plate is restricted by the locking plate, and the elastic member is elastically deformed in the horizontal direction. In addition, since the locking plate is formed with a predetermined gap between the upper surface of the flange plate and the both end portions, even if a rotational force is applied to the bridge girder by a live load or the like, the gap plate is engaged with the flange plate. The stop plate does not lock. At this time, since a predetermined gap is provided in the horizontal direction and the vertical direction between the key member and the recessed portion of the locking plate, no force in the rotational direction is applied to the flange plate via the key member. . Further, since the buffer member is provided in the gap between the both ends of the flange plate and the locking plate, the shock force when the locking plate is locked to the both ends of the flange plate is alleviated by the buffer member. The

本発明の橋梁用弾性支承によれば、橋桁が支持体に対して所定の水平方向に移動する場合には、係止プレートがフランジプレートに水平方向及び下方から係止して弾性部材が水平方向に弾性変形するので、支持体に対して橋桁を水平方向に弾性支持することができる。また、活荷重などにより橋桁に回転方向の力が加わっても、前記隙間によってフランジプレートと係止プレートとが係止せず、キー部材を介してフランジプレートに回転方向の力が加わらないので、橋桁に加わる回転方向の力によって弾性部材が回転方向に変形することがなく、回転方向への変形による弾性部材の強度低下を防止することができる。これにより、弾性部材の上下方向の寸法を小さくしても弾性部材の強度を確保することができ、弾性部材を小型化することによる省スペース化及び製造コストの低減を図ることが可能となる。さらに、係止プレートがフランジプレートの前記両端部に係止する際の衝撃力が緩衝部材によって緩和されるので、例えば突風などによって係止プレートがフランジプレートに係止する場合でも、係止部から騒音が発生することはない。また、係止の際の衝撃力を緩和することができるので、フランジプレート及び係止プレートを無用に高強度に形成する必要がなく、省スペース化及び製造コストの低減を図る上で極めて有利である。 According to the elastic bearing for a bridge of the present invention, when the bridge girder moves in a predetermined horizontal direction with respect to the support body, the locking plate is locked to the flange plate from the horizontal direction and from below, and the elastic member is horizontal. Therefore, the bridge girder can be elastically supported in the horizontal direction with respect to the support. In addition, even if a rotational force is applied to the bridge girder due to a live load or the like, the flange plate and the locking plate are not locked by the gap, and the rotational force is not applied to the flange plate via the key member . The elastic member is not deformed in the rotating direction by the force in the rotating direction applied to the bridge girder, and the strength of the elastic member can be prevented from being reduced due to the deformation in the rotating direction. Thereby, even if the vertical dimension of the elastic member is reduced, the strength of the elastic member can be ensured, and it becomes possible to save space and reduce the manufacturing cost by downsizing the elastic member. Furthermore, since the impact force when the locking plate is locked to the both end portions of the flange plate is reduced by the buffer member, even when the locking plate is locked to the flange plate due to, for example, a gust of wind, from the locking portion No noise is generated. Further, since the impact force at the time of locking can be eased, it is not necessary to form the flange plate and the locking plate unnecessarily with high strength, which is extremely advantageous for saving space and reducing manufacturing costs. is there.

図1乃至図6は本発明の第1の実施形態を示すもので、図1は橋梁の橋軸直角方向における一部断面図、図2は橋梁用弾性支承の橋軸直角方向における断面図、図3は橋梁用弾性支承の橋軸方向における断面図、図4は図3におけるA−A線断面図、図5は橋桁が橋脚に対して橋軸直角方向にずれた状態を示す橋梁用弾性支承の橋軸直角方向における断面図、図6は橋桁が橋脚に対して橋軸方向に傾いた状態を示す橋梁用弾性支承の橋軸方向における断面図である。   1 to 6 show a first embodiment of the present invention. FIG. 1 is a partial cross-sectional view of a bridge in a direction perpendicular to the bridge axis, and FIG. 2 is a cross-sectional view of a bridge elastic support in a direction perpendicular to the bridge axis. 3 is a cross-sectional view of the bridge elastic bearing in the direction of the bridge axis, FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, and FIG. 5 is an elastic view of the bridge showing a state in which the bridge girder is displaced in the direction perpendicular to the bridge axis with respect to the pier. FIG. 6 is a cross-sectional view in the direction of the bridge axis of the elastic bearing for a bridge showing a state in which the bridge girder is tilted in the direction of the bridge axis with respect to the pier.

本実施形態の橋梁用弾性支承は、橋桁1に取付けられた係止プレートとしてのソールプレート10と、支持体としての橋脚2に取付けられたベースプレート20と、ソールプレート10に係止可能なフランジプレートとしての上沓30と、ベースプレート20に取付けられた下沓40と、ソールプレート10と上沓30との間に設けられた緩衝部材としての緩衝ゴム50と、上沓30と下沓40との間に配置された弾性部材60とを備えている。   The elastic bearing for a bridge according to this embodiment includes a sole plate 10 as a locking plate attached to a bridge girder 1, a base plate 20 attached to a bridge pier 2 as a support, and a flange plate that can be locked to the sole plate 10. An upper collar 30, a lower collar 40 attached to the base plate 20, a buffer rubber 50 as a cushioning member provided between the sole plate 10 and the upper collar 30, and the upper collar 30 and the lower collar 40. And an elastic member 60 disposed therebetween.

橋桁1は上面に自動車用道路が設けられ、橋軸直角方向Yに並ぶように設けられた2つの鉛直方向支持機構3によって橋脚2に支持されている。また、鉛直方向支持機構3は周知の積層ゴム構造体からなり、上面側が橋桁1の下面に取付けられるとともに、下面側が橋脚2の上面に取付けられている。   The bridge girder 1 is provided with an automobile road on the upper surface and is supported by the pier 2 by two vertical support mechanisms 3 provided so as to be aligned in the direction Y perpendicular to the bridge axis. The vertical support mechanism 3 is made of a well-known laminated rubber structure. The upper surface side is attached to the lower surface of the bridge girder 1 and the lower surface side is attached to the upper surface of the pier 2.

ソールプレート10は、橋桁1の下面に取付けられた橋桁側プレート11と、橋桁側プレート11の下面における橋軸直角方向Yの両端部にそれぞれ下方に延びるように設けられた第1係止部材としての一対の第1延設部材12と、各第1延設部材12の下面にそれぞれ設けられた第2係止部材としての一対の第1下側係止部材13と、橋桁側プレート11の下面における橋軸方向Xの両端部にそれぞれ下方に延びるように設けられた第3係止部材としての一対の第2延設部材14と、各第2延設部材14の下面にそれぞれ設けられた第4係止部材としての一対の第2下側係止部材15とから構成されている。   The sole plate 10 is a bridge girder side plate 11 attached to the lower surface of the bridge girder 1 and a first locking member provided to extend downward at both ends of the lower surface of the bridge girder side plate 11 in the direction perpendicular to the bridge axis Y. A pair of first extending members 12, a pair of first lower engaging members 13 as second engaging members provided on the lower surface of each first extending member 12, and the lower surface of the bridge girder side plate 11. A pair of second extending members 14 as third locking members provided so as to extend downward at both ends in the bridge axis direction X, respectively, and a second provided on the lower surface of each second extending member 14. It is comprised from a pair of 2nd lower side latching member 15 as 4 latching members.

橋桁側プレート11は各鉛直方向支持機構3の間に配置され、複数のアンカーボルト11aによって橋桁1に取付けられている。尚、橋桁1が鉄鋼材料から形成されている場合は、プレート11を橋桁1にボルトや溶接によって取付けることも可能である。また、橋桁側プレート11は鉄鋼材料からなり、矩形の板状に形成されている。さらに、橋桁側プレート11の下面における中央部には凹状部11bが設けられ、凹状部11bは水平方向の断面が円形状に形成されている。   The bridge girder side plate 11 is disposed between the vertical support mechanisms 3 and is attached to the bridge girder 1 by a plurality of anchor bolts 11a. In addition, when the bridge girder 1 is formed from a steel material, it is also possible to attach the plate 11 to the bridge girder 1 by bolts or welding. Moreover, the bridge girder side plate 11 consists of steel materials, and is formed in the rectangular plate shape. Further, a concave portion 11b is provided at the center of the lower surface of the bridge girder side plate 11, and the concave portion 11b has a circular cross section in the horizontal direction.

各第1延設部材12は橋桁側プレート11における橋軸直角方向Yの両端部に沿うように形成された直方体の部材からなり、互いに橋軸方向Xに間隔をおいて複数の取付孔12aが設けられている。ここで、第1延設部材12は市販されている標準サイズの断面長方形の圧延鋼材を所定の長さに切断して形成されている。   Each of the first extending members 12 is a rectangular parallelepiped member formed along both ends of the bridge girder side plate 11 in the bridge axis perpendicular direction Y, and a plurality of mounting holes 12a are spaced from each other in the bridge axis direction X. Is provided. Here, the first extending member 12 is formed by cutting a commercially available standard rolled steel material having a rectangular cross section into a predetermined length.

各第1下側係止部材13は各第1延設部材12の下面に沿うように形成された直方体の部材からなるとともに、橋桁側プレート11における橋軸直角方向Yの内側に延びるように形成され、第1延設部材12の各取付孔12aに対応する位置にそれぞれ取付孔13aが設けられている。ここで、第1下側係止部材13は市販されている標準サイズの断面長方形の圧延鋼材を所定の長さに切断して形成されている。また、各取付孔13aにはそれぞれ第1取付部材としてのボルト13bが下方から挿入され、各ボルト13bは各取付孔12aを挿通して橋桁側プレート11にそれぞれ螺合している。即ち、各延設部材12及び第1下側係止部材13は各ボルト13bによって橋桁側プレート11に取付けられている。   Each first lower locking member 13 is formed of a rectangular parallelepiped member formed along the lower surface of each first extending member 12 and is formed so as to extend inward in the bridge axis perpendicular direction Y in the bridge girder side plate 11. The mounting holes 13a are provided at positions corresponding to the mounting holes 12a of the first extending member 12, respectively. Here, the first lower locking member 13 is formed by cutting a commercially available standard rolled steel material having a rectangular section in a predetermined length. Further, bolts 13b as first mounting members are inserted into the respective mounting holes 13a from below, and the respective bolts 13b are inserted into the respective mounting holes 12a and screwed into the bridge girder side plate 11, respectively. That is, each extending member 12 and the first lower locking member 13 are attached to the bridge girder side plate 11 by each bolt 13b.

各第2延設部材14は橋桁側プレート11における橋軸方向Xの両端部に沿うように形成された直方体の部材からなり、互いに橋軸直角方向Yに間隔をおいて複数の取付孔14aが設けられている。ここで、第2延設部材14は市販されている標準サイズの断面長方形の圧延鋼材を所定の長さに切断して形成されている。   Each second extending member 14 is a rectangular parallelepiped member formed along both ends of the bridge girder side plate 11 in the bridge axis direction X, and a plurality of mounting holes 14a are spaced from each other in the bridge axis perpendicular direction Y. Is provided. Here, the second extending member 14 is formed by cutting a commercially available standard rolled steel material having a rectangular cross section into a predetermined length.

各第2下側係止部材15は各第2延設部材14の下面に沿うように形成された直方体の部材からなり、橋桁側プレート11における橋軸方向Xの内側に延びるように形成され、第1延設部材14の各取付孔14aに対応する位置にそれぞれ取付孔15aが設けられている。ここで、第2下側係止部材15は市販されている標準サイズの断面長方形の圧延鋼材を所定の長さに切断して形成されている。また、各取付孔15aにはそれぞれ第2取付部材としてのボルト15bが下方から挿入され、各ボルト15bは各取付孔14aを挿通して橋桁側プレート11にそれぞれ螺合している。即ち、各延設部材14及び第2下側係止部材15は各ボルト15bによって橋桁側プレート11に取付けられている。   Each second lower locking member 15 is formed of a rectangular parallelepiped member formed along the lower surface of each second extending member 14, and is formed to extend inward in the bridge axis direction X in the bridge girder side plate 11, Attachment holes 15a are provided at positions corresponding to the attachment holes 14a of the first extending member 14, respectively. Here, the second lower locking member 15 is formed by cutting a commercially available standard rolled steel material having a rectangular cross section into a predetermined length. Further, bolts 15b as second mounting members are inserted into the respective mounting holes 15a from below, and the respective bolts 15b are inserted into the respective mounting holes 14a and screwed into the bridge girder side plate 11, respectively. That is, each extending member 14 and the second lower locking member 15 are attached to the bridge girder side plate 11 by each bolt 15b.

ベースプレート20は鉄鋼材料からなり、橋桁側プレート11と同様の形状に形成されるとともに、複数のアンカーボルト20aによって橋脚2に取付けられている。尚、橋脚2が鉄鋼材料から形成されている場合は、ベースプレート20を橋脚2にボルトや溶接によって取付けることも可能である。また、ベースプレート20の上面における中央部には凹状部20bが設けられ、凹状部20bは水平方向の断面が円形状に形成されている。   The base plate 20 is made of a steel material, is formed in the same shape as the bridge girder side plate 11, and is attached to the pier 2 by a plurality of anchor bolts 20a. In addition, when the pier 2 is formed from a steel material, the base plate 20 can be attached to the pier 2 by bolts or welding. In addition, a concave portion 20b is provided at the center of the upper surface of the base plate 20, and the horizontal portion of the concave portion 20b is formed in a circular shape.

上沓30は鉄鋼材料からなり、矩形の板状に形成されている。また、上沓30の橋軸直角方向Yの両端部とソールプレート10の各第1延設部材12との間には所定の隙間が設けられるとともに、上沓30の橋軸方向Xの両端部と各第2延性部材14との間には所定の隙間が設けられている。さらに、上沓30の上面と橋桁側プレート11との間には所定の隙間が設けられるとともに、上沓30の下面と各下側係止部材13,15との間には所定の隙間が設けられている。また、上沓30の中央部には貫通孔30aが設けられ、貫通孔30aは水平方向の断面が円形状に形成されている。   The upper collar 30 is made of a steel material and is formed in a rectangular plate shape. Further, a predetermined gap is provided between both ends of the upper bridge 30 in the direction perpendicular to the bridge axis Y and the first extending members 12 of the sole plate 10, and both ends of the upper bridge 30 in the bridge axis direction X. And a predetermined gap is provided between each of the second ductile members 14. Further, a predetermined gap is provided between the upper surface of the upper rod 30 and the bridge girder side plate 11, and a predetermined gap is provided between the lower surface of the upper rod 30 and the lower locking members 13 and 15. It has been. In addition, a through hole 30a is provided at the center of the upper collar 30, and the through hole 30a has a circular cross section in the horizontal direction.

下沓40は鉄鋼材料からなり、上沓30と同様の形状である矩形の板状に形成されるとともに、複数のボルト40aによってベースプレート20に取付けられている。また、下沓40の中央部には貫通孔40bが設けられ、貫通孔40bは水平方向の断面が円形状に形成されている。   The lower rod 40 is made of a steel material, is formed in a rectangular plate shape having the same shape as the upper rod 30, and is attached to the base plate 20 by a plurality of bolts 40a. In addition, a through hole 40b is provided in the central portion of the lower rod 40, and the through hole 40b has a circular cross section in the horizontal direction.

緩衝ゴム50は天然ゴムや合成ゴムからなり、上沓30の橋軸直角方向Y及び橋軸方向Xの両端部とソールプレート10との隙間に設けられている。即ち、上沓30は緩衝ゴム50を介してソールプレート10の各第1延設部材12に橋軸直角方向Yに係止し、橋桁1に対する橋軸直角方向Yへの移動を規制されるようになっている。また、上沓30は緩衝ゴム50を介してソールプレート10の各第2延設部材14に係止し、橋桁1に対する橋軸方向Xへの移動を規制されるようになっている。さらに、上沓30は緩衝ゴム50を介して各下側係止部材13,15に係止し、橋桁1に対する下方への移動を規制されるようになっている。   The buffer rubber 50 is made of natural rubber or synthetic rubber, and is provided in the gap between the both ends of the upper bridge 30 in the direction perpendicular to the bridge axis Y and the bridge axis direction X and the sole plate 10. That is, the upper rod 30 is locked to each first extending member 12 of the sole plate 10 via the buffer rubber 50 in the direction perpendicular to the bridge axis Y so that the movement of the bridge girder 1 in the direction perpendicular to the bridge axis Y is restricted. It has become. Further, the upper rod 30 is locked to each second extending member 14 of the sole plate 10 via the buffer rubber 50 so that the movement of the bridge girder 1 in the bridge axis direction X is restricted. Further, the upper rod 30 is locked to the lower locking members 13 and 15 via the buffer rubber 50 so that the downward movement with respect to the bridge girder 1 is restricted.

弾性部材60は、上沓30に取付けられた上側補強板61と、下沓40に取付けられた下側補強板62と、上側補強板61と下側補強板62との間に互いに上下方向に間隔をおいて設けられた複数の補強板63と、各補強板61,62,63を加硫接着によって連結するゴム部材64とから構成されている。   The elastic member 60 is disposed between the upper reinforcement plate 61 attached to the upper collar 30, the lower reinforcement board 62 attached to the lower collar 40, and the upper reinforcement board 61 and the lower reinforcement board 62 in the vertical direction. The reinforcing plate 63 includes a plurality of reinforcing plates 63 provided at intervals, and a rubber member 64 that connects the reinforcing plates 61, 62, and 63 by vulcanization adhesion.

上側補強板61は鉄鋼材料からなり、矩形の板状に形成されるとともに、複数のボルト61aによって上沓30に取付けられている。また、上側補強板61の上面には凹状部61bが設けられ、凹状部61bは水平方向の断面が円形状に形成されている。さらに、凹状部61bには円柱状のキー部材61cが挿入され、キー部材61cの上端部側は上沓30の貫通孔30aを挿通するとともに、橋桁側プレート11の凹状部11bに挿入されている。また、キー部材61cの上端部と橋桁側プレート11の凹状部11bとの間には水平方向及び上下方向に所定の隙間が設けられている。   The upper reinforcing plate 61 is made of a steel material, is formed in a rectangular plate shape, and is attached to the upper collar 30 by a plurality of bolts 61a. Further, a concave portion 61b is provided on the upper surface of the upper reinforcing plate 61, and the concave portion 61b has a circular cross section in the horizontal direction. Further, a columnar key member 61c is inserted into the concave portion 61b, and the upper end side of the key member 61c is inserted into the concave portion 11b of the bridge girder side plate 11 while being inserted through the through hole 30a of the upper collar 30. . A predetermined gap is provided between the upper end of the key member 61c and the concave portion 11b of the bridge girder side plate 11 in the horizontal direction and the vertical direction.

下側補強板62は鉄鋼材料からなり、矩形の板状に形成されるとともに、複数のボルト62aによって下沓40に取付けられている。また、下側補強板62の下面には凹状部62bが設けられ、凹状部62bは水平方向の断面が円形状に形成されている。さらに、凹状部62bには円柱状のキー部材62cが挿入され、キー部材62cの下端部側は下沓40の貫通孔40bを挿通するとともに、ベース板20の凹状部20bに挿入されている。   The lower reinforcing plate 62 is made of a steel material, is formed in a rectangular plate shape, and is attached to the lower rod 40 by a plurality of bolts 62a. Further, a concave portion 62b is provided on the lower surface of the lower reinforcing plate 62, and the concave portion 62b has a circular cross section in the horizontal direction. Further, a cylindrical key member 62c is inserted into the concave portion 62b, and the lower end side of the key member 62c is inserted through the through hole 40b of the lower collar 40 and is inserted into the concave portion 20b of the base plate 20.

各補強板63は鉄鋼材料からなり、矩形の板状に形成されている。また、各補強板63は上側補強板61及び下側補強板62よりも薄く形成されている。   Each reinforcing plate 63 is made of a steel material and is formed in a rectangular plate shape. Each reinforcing plate 63 is formed thinner than the upper reinforcing plate 61 and the lower reinforcing plate 62.

ゴム部材64は高減衰ゴムからなり、各補強板61,62,63を被覆するように形成されるとともに、水平方向の断面形状が矩形となる直方体に形成されている。一方、上沓30及び下沓40は弾性部材60の側面よりも橋軸直角方向Y及び橋軸方向Xに突出するように形成されている。ここで、高減衰ゴムとしては、特開平10−219029号公報、特開平10−219033号公報、特開2000−336207号公報、特開2002−020546号公報などに示されているものを使用することが望ましい。   The rubber member 64 is made of high-damping rubber, is formed so as to cover the reinforcing plates 61, 62, and 63, and is formed in a rectangular parallelepiped whose horizontal cross-sectional shape is rectangular. On the other hand, the upper rod 30 and the lower rod 40 are formed so as to protrude in the bridge axis perpendicular direction Y and the bridge axis direction X from the side surface of the elastic member 60. Here, as the high damping rubber, those shown in JP-A-10-219029, JP-A-10-219033, JP-A-2000-336207, JP-A-2002-020546, etc. are used. It is desirable.

以上のように構成された橋梁用弾性支承は、各鉛直方向支持機構3によって橋桁1が鉛直方向に支持されていることから、橋桁側プレート11の下面と上沓30の上面との間に所定の隙間を設けた状態で橋桁1と橋脚2との間に取付けられる。また、上沓30の橋軸直角方向Y及び橋軸方向Xの両端部とソールプレート10との間に所定の隙間が設けられるように、ソールプレート10が橋桁1に取付けられている。   In the elastic bearing for a bridge configured as described above, since the bridge girder 1 is supported in the vertical direction by each vertical support mechanism 3, a predetermined gap is provided between the lower surface of the bridge girder side plate 11 and the upper surface of the upper eaves 30. It is attached between the bridge girder 1 and the pier 2 with a gap of. The sole plate 10 is attached to the bridge girder 1 so that a predetermined gap is provided between both ends of the upper bridge 30 in the direction perpendicular to the bridge axis Y and the bridge axis direction X and the sole plate 10.

ここで、図5に示すように、風などによって橋桁1に橋軸直角方向Yの力が加わる場合には、橋桁1が橋脚2に対して橋軸直角方向Yに移動し、ソールプレート10が緩衝ゴム50を介して上沓30に係止する。これにより、弾性部材60が橋軸直角方向Yに剪断変形しながら橋桁1を橋軸直角方向Yに支持する。この際、ソールプレート10が上沓30に係止した後にキー部材61cが橋桁側プレート11の凹状部11bに水平方向に係止し、ソールプレート10に対する上沓30の径方向の移動が規制される。   Here, as shown in FIG. 5, when a force in the direction perpendicular to the bridge axis Y is applied to the bridge girder 1 by wind or the like, the bridge girder 1 moves in the direction Y perpendicular to the bridge axis 2 with respect to the pier 2, and the sole plate 10 is moved. The upper hook 30 is locked via the buffer rubber 50. Thereby, the elastic member 60 supports the bridge girder 1 in the bridge axis perpendicular direction Y while shearing and deforming in the bridge axis perpendicular direction Y. At this time, after the sole plate 10 is locked to the upper rod 30, the key member 61 c is horizontally locked to the concave portion 11 b of the bridge beam side plate 11, and the radial movement of the upper rod 30 relative to the sole plate 10 is restricted. The

また、気温の変化や活荷重によって橋桁1が橋軸方向Xに伸びた場合には、橋桁1が橋脚2に対して橋軸方向Xに移動し、ソールプレート10が緩衝ゴム50を介して上沓30に係止する。これにより、橋軸直角方向Yの場合と同様に、弾性部材60が橋軸方向Xに剪断変形しながら橋桁1を橋軸方向Xに支持する。この際、ソールプレート10が上沓30に係止した後にキー部材61cが橋桁側プレート11の凹状部11bに水平方向に係止し、ソールプレート10に対する上沓30の径方向の移動が規制される。   Further, when the bridge girder 1 extends in the bridge axis direction X due to a change in temperature or a live load, the bridge girder 1 moves in the bridge axis direction X with respect to the pier 2, and the sole plate 10 moves up via the buffer rubber 50. Lock to the collar 30. Thereby, as in the case of the bridge axis perpendicular direction Y, the elastic member 60 supports the bridge girder 1 in the bridge axis direction X while shearing and deforming in the bridge axis direction X. At this time, after the sole plate 10 is locked to the upper rod 30, the key member 61 c is horizontally locked to the concave portion 11 b of the bridge beam side plate 11, and the radial movement of the upper rod 30 relative to the sole plate 10 is restricted. The

ここで、ソールプレート10は緩衝ゴム50を介して上沓30に係止するので、ソールプレート10が上沓30に係止する際の衝撃力が緩衝ゴム50によって緩和される。   Here, since the sole plate 10 is locked to the upper collar 30 via the buffer rubber 50, the impact force when the sole plate 10 is locked to the upper collar 30 is relieved by the buffer rubber 50.

また、ソールプレート10は上沓30に橋軸直角方向Y及び橋軸方向Xに係止可能に形成されているので、弾性部材60によって橋桁1を橋軸直角方向Y及び橋軸方向Xに弾性支持することができる。   Further, since the sole plate 10 is formed to be able to be locked in the bridge axis perpendicular direction Y and the bridge axis direction X on the upper collar 30, the bridge girder 1 is elastically elastic in the bridge axis perpendicular direction Y and the bridge axis direction X by the elastic member 60. Can be supported.

さらに、弾性部材60を構成するゴム部材64が高減衰ゴムから形成されているので、橋脚2に対して移動する橋桁1の運動エネルギーを弾性部材60の剪断変形によって大幅に減衰することができる。これにより、風などによる橋桁1の揺れを早期に減衰させることができ、弾性部材60によって橋桁1を水平方向に確実に弾性支持することができる。   Furthermore, since the rubber member 64 that constitutes the elastic member 60 is formed of high-damping rubber, the kinetic energy of the bridge girder 1 that moves relative to the pier 2 can be significantly attenuated by the shear deformation of the elastic member 60. Thereby, the shaking of the bridge girder 1 by a wind etc. can be attenuated at an early stage, and the bridge girder 1 can be reliably elastically supported in the horizontal direction by the elastic member 60.

一方、図6に示すように、活荷重によって橋桁1に回転方向(図示した矢印の方向)の力が加わり、ソールプレート10が橋軸方向Xに傾く場合には、上沓30の上面及び橋軸方向Xの両端部とソールプレート10との間に所定の隙間が設けられているので、ソールプレート10が上沓30に係止しない。また、活荷重によって橋桁1に回転方向の力が加わり、ソールプレート10が橋軸直角方向Yに傾く場合には、橋軸方向Xの場合と同様に、上沓30の上面及び橋軸直角方向Yの両端部とソールプレート10との間に所定の隙間が設けられているので、ソールプレート10が上沓30に係止しない。この際、キー部材61cと橋桁側プレート11の凹状部11bとの間には隙間が設けられているので、キー部材61cを介して上沓30に回転方向の力が加わることがない。   On the other hand, as shown in FIG. 6, when a force in the rotational direction (in the direction of the arrow shown) is applied to the bridge girder 1 by the live load and the sole plate 10 is inclined in the bridge axis direction X, the upper surface of the upper bridge 30 and the bridge Since a predetermined gap is provided between both end portions in the axial direction X and the sole plate 10, the sole plate 10 is not locked to the upper collar 30. Further, when a rotational force is applied to the bridge girder 1 by the live load and the sole plate 10 is inclined in the bridge axis perpendicular direction Y, the upper surface of the upper rod 30 and the bridge axis perpendicular direction are the same as in the bridge axis direction X. Since a predetermined gap is provided between both ends of Y and the sole plate 10, the sole plate 10 does not engage with the upper collar 30. At this time, since a gap is provided between the key member 61c and the concave portion 11b of the bridge girder side plate 11, no force in the rotational direction is applied to the upper rod 30 via the key member 61c.

次に、例えば地震によって橋桁1が橋脚2に対して橋軸直角方向Yまたは橋軸方向Xに大きく移動する場合には、弾性部材60が大きく剪断変形して上沓30が下方に移動しようとするが、上沓30はソールプレート10の各下側係止部材13,15によって下方への移動を規制されているので、ソールプレート10と上沓30との橋軸直角方向Yまたは橋軸方向Xの係止が解除されることがない。   Next, when the bridge girder 1 moves greatly in the bridge axis perpendicular direction Y or the bridge axis direction X with respect to the pier 2 due to an earthquake, for example, the elastic member 60 is greatly sheared and the upper rod 30 tries to move downward. However, since the upper rod 30 is restricted from moving downward by the lower locking members 13 and 15 of the sole plate 10, the bridge axis perpendicular direction Y or the bridge axis direction between the sole plate 10 and the upper rod 30. The lock of X is not released.

このように、本実施形態によれば、ソールプレート10には第1延設部材12及び第2延設部材14が設けられ、ソールプレート10が上沓30に橋軸直角方向Y及び橋軸方向Xに係止可能に形成されているので、風や気温の変化などによって橋桁1が橋脚2に対して橋軸直角方向Yまたは橋軸方向Xに移動する場合には、ソールプレート10が上沓30に水平方向に係止し、弾性部材60が剪断変形しながら橋桁1を水平方向に支持することができる。   Thus, according to this embodiment, the sole plate 10 is provided with the first extending member 12 and the second extending member 14, and the sole plate 10 is connected to the upper rod 30 in the direction perpendicular to the bridge axis Y and the bridge axis direction. Since the bridge girder 1 moves in the direction perpendicular to the bridge axis Y or the bridge axis direction X with respect to the pier 2 due to changes in wind or temperature, etc., the sole plate 10 is The bridge girder 1 can be supported in the horizontal direction while the elastic member 60 is sheared and deformed.

また、上沓30の上面及び橋軸直角方向Y及び橋軸方向Xの両端部とソールプレート10との間に所定の隙間が設けられているので、活荷重によって橋桁1に回転方向の力が加わり橋桁1が橋軸直角方向Yまたは橋軸方向Xに傾いても、前記隙間によってソールプレート10が上沓30に係止しないので、橋桁1に加わる回転方向の力によって弾性部材60が回転方向に変形することがなく、回転方向への変形による弾性部材60の強度低下を防止することができる。これにより、弾性部材60の上下方向の寸法を小さくしても弾性部材60の強度を確保することができ、弾性部材60を小型化することによる省スペース化及び製造コストの低減を図ることができる。   In addition, since a predetermined gap is provided between the upper surface of the upper rod 30 and both ends of the bridge axis perpendicular direction Y and the bridge axis direction X and the sole plate 10, a force in the rotational direction is applied to the bridge girder 1 by a live load. Even if the bridge girder 1 is inclined in the bridge axis perpendicular direction Y or the bridge axis direction X, the elastic plate 60 is rotated in the rotational direction due to the rotational force applied to the bridge girder 1 because the sole plate 10 is not locked to the upper collar 30 by the gap. Therefore, the strength of the elastic member 60 can be prevented from being reduced due to deformation in the rotation direction. Thereby, even if the vertical dimension of the elastic member 60 is reduced, the strength of the elastic member 60 can be secured, and the space can be saved and the manufacturing cost can be reduced by downsizing the elastic member 60. .

さらに、上沓30の橋軸直角方向Y及び橋軸方向Xの両端部とソールプレート10との隙間には全周に亘って緩衝ゴム50が設けられ、ソールプレート10は緩衝ゴム50を介して上沓30に係止するようになっているので、ソールプレート10が上沓30に係止する際の衝撃力が緩衝ゴム50によって緩和され、例えば突風などによって橋桁1に大きな力が加わってソールプレート10が上沓30に係止する場合でも、係止部からの騒音が発生することはない。また、係止の際の衝撃力を緩和することができるので、ソールプレート10及び上沓30を無用に高強度に形成する必要がなく、省スペース化及び製造コストの削減を図る上で極めて有利である。   Further, a buffer rubber 50 is provided over the entire circumference in the gap between the both ends of the upper bridge 30 in the direction perpendicular to the bridge axis Y and the bridge axis direction X and the sole plate 10, and the sole plate 10 is interposed via the buffer rubber 50. Since the sole plate 10 is locked to the upper rod 30, the impact force when the sole plate 10 is locked to the upper rod 30 is alleviated by the buffer rubber 50, and a large force is applied to the bridge girder 1 due to, for example, a gust of wind. Even when the plate 10 is locked to the upper collar 30, noise from the locking portion is not generated. Further, since the impact force at the time of locking can be relaxed, there is no need to form the sole plate 10 and the upper collar 30 unnecessarily with high strength, which is extremely advantageous for saving space and reducing manufacturing costs. It is.

また、ソールプレート10には各下側係止部材13,15が設けられ、各下側係止部材13,15によって上沓30の下方への移動が規制されるようになっているので、例えば地震によって橋桁1が橋脚2に対して橋軸直角方向Yまたは橋軸方向Xに大きく移動する場合にも、ソールプレート10と上沓30との橋軸直角方向Yまたは橋軸方向Xの係止が解除されることがなく、弾性部材60によって橋桁1を水平方向に確実に弾性支持することができる。   Further, since the lower locking members 13 and 15 are provided on the sole plate 10 and the lower locking members 13 and 15 restrict the downward movement of the upper collar 30, for example, Even when the bridge girder 1 moves greatly in the bridge axis perpendicular direction Y or the bridge axis direction X with respect to the pier 2 due to the earthquake, the locking of the sole plate 10 and the upper bridge 30 in the bridge axis perpendicular direction Y or the bridge axis direction X Is not released, and the bridge girder 1 can be reliably elastically supported in the horizontal direction by the elastic member 60.

さらに、ソールプレート10を、各延設部材12,14及び各下側係止部材13,15を各ボルト13b,15bによって橋桁側プレート11に取付ける簡単な構造としたので、各延設部材12,14及び各下側係止部材13,15を市販されている標準サイズの圧延鋼材を所定の長さに切断することにより形成することができ、ソールプレート10の製造を容易にするとともに製造コストの低減を図ることができる。   Further, since the sole plate 10 has a simple structure in which the extending members 12, 14 and the lower locking members 13, 15 are attached to the bridge girder side plate 11 by the bolts 13b, 15b, the extending members 12, 14 14 and each of the lower locking members 13 and 15 can be formed by cutting a commercially available standard-sized rolled steel material into a predetermined length, facilitating the manufacture of the sole plate 10 and reducing the manufacturing cost. Reduction can be achieved.

尚、本実施形態では、ソールプレート10に各延設部材12,14及び各下側係止部材13,15を設け、ソールプレート10を上沓30に橋軸直角方向Y及び橋軸方向Xに係止可能に形成したものを示したが、図7に示すように、ソールプレート10に第1係止部材としての一対の第1延設部材12及び第2係止部材としての一対の第1下側係止部材13のみを設け、ソールプレート10を上沓30に橋軸直角方向Yにのみ係止可能に形成することもできる。この場合は上沓30の橋軸直角方向Yの両端部とソールプレート10との隙間に緩衝ゴム50を設ける。これにより、橋桁1の橋軸直角方向Yへの移動を弾性部材60によって弾性支持することができる。   In this embodiment, the extending members 12 and 14 and the lower locking members 13 and 15 are provided on the sole plate 10, and the sole plate 10 is mounted on the upper rod 30 in the bridge axis perpendicular direction Y and the bridge axis direction X. As shown in FIG. 7, a pair of first extending members 12 as first locking members and a pair of first locking members as second locking members are shown. It is also possible to provide only the lower locking member 13 so that the sole plate 10 can be locked to the upper rod 30 only in the direction Y perpendicular to the bridge axis. In this case, the buffer rubber 50 is provided in the gap between the both ends of the upper rod 30 in the direction perpendicular to the bridge axis Y and the sole plate 10. Thereby, the movement of the bridge girder 1 in the direction perpendicular to the bridge axis Y can be elastically supported by the elastic member 60.

また、ソールプレート10に第1係止部材としての一対の第2延設部材14及び第2係止部材としての一対の下側第2係止部材15のみを設け、ソールプレート10を上沓30に橋軸方向Xにのみ係止可能に形成することもできる。この場合は、上沓30の橋軸方向Xの両端部とソールプレート10との隙間に緩衝ゴム50を設ける。これにより、橋桁1の橋軸方向Xへの移動を弾性部材60によって弾性支持することができる。   Further, the sole plate 10 is provided with only a pair of second extending members 14 as a first locking member and a pair of lower second locking members 15 as a second locking member, and the sole plate 10 is attached to the upper collar 30. It can also be formed so as to be locked only in the bridge axis direction X. In this case, the buffer rubber 50 is provided in the gap between the both ends in the bridge axis direction X of the upper rod 30 and the sole plate 10. Thereby, the movement of the bridge girder 1 in the bridge axis direction X can be elastically supported by the elastic member 60.

本発明における一実施形態を示す橋梁の橋軸直角方向における一部断面図1 is a partial sectional view of a bridge in a direction perpendicular to a bridge axis showing an embodiment of the present invention. 橋梁用弾性支承の橋軸直角方向における断面図Cross section of bridge elastic bearing in the direction perpendicular to the bridge axis 橋梁用弾性支承の橋軸方向における断面図Sectional view of the bridge elastic bridge support in the direction of the bridge axis 図3におけるA−A線断面図AA line sectional view in FIG. 橋桁が橋脚に対して橋軸直角方向にずれた状態を示す橋梁用弾性支承の橋軸直角方向における断面図Cross-sectional view in the direction perpendicular to the bridge axis showing the bridge support with the bridge girder shifted from the pier in the direction perpendicular to the bridge axis 橋桁が橋脚に対して橋軸方向に傾いた状態を示す橋梁用弾性支承の橋軸方向における断面図Cross-sectional view in the direction of the bridge axis of the elastic bearing for bridge showing the bridge girder tilted in the direction of the bridge axis with respect to the pier 本発明におけるソールプレートの変形例を示す橋梁用弾性支承の水平方向断面図The horizontal direction sectional view of the elastic bearing for bridges which shows the modification of the sole plate in the present invention 従来の橋梁用弾性支承の橋軸方向における断面図Sectional view of a conventional elastic bearing for bridges in the direction of the bridge axis

符号の説明Explanation of symbols

1…橋桁、2…橋脚、3…鉛直方向支持機構、10…ソールプレート、11…橋桁側プレート、12…第1延設部材、13…第1下側係止部材、13b…ボルト、14…第2延設部材、15…第2下側係止部材、15b…ボルト、20…ベースプレート、30…上沓、40…下沓、50…緩衝ゴム、60…弾性部材、61…上側補強板、62…下側補強板、63…補強板、64…ゴム部材、X…橋軸方向、Y…橋軸直角方向。   DESCRIPTION OF SYMBOLS 1 ... Bridge girder, 2 ... Bridge pier, 3 ... Vertical direction support mechanism, 10 ... Sole plate, 11 ... Bridge girder side plate, 12 ... 1st extending member, 13 ... 1st lower side locking member, 13b ... Bolt, 14 ... 2nd extending member, 15 ... 2nd lower side locking member, 15b ... Bolt, 20 ... Base plate, 30 ... Upper collar, 40 ... Lower collar, 50 ... Buffer rubber, 60 ... Elastic member, 61 ... Upper reinforcement board, 62 ... lower reinforcing plate, 63 ... reinforcing plate, 64 ... rubber member, X ... bridge axis direction, Y ... bridge axis perpendicular direction.

Claims (4)

橋桁と橋桁を支持する支持体との間に橋桁を鉛直方向に支持する他の支承とともに設けられ、橋桁を支持体に対して水平方向に弾性支持する橋梁用弾性支承において、
下端部側が支持体に固定されるとともに、上端部にフランジプレートが設けられ、水平方向に弾性変形可能な弾性部材と、
橋桁に固定され、フランジプレートの橋軸直角方向及び橋軸方向の両端部に水平方向及び下方から係止可能に形成されるとともに、フランジプレートの上面及び前記各両端部と所定の隙間を設けて形成され、下面に凹状部が設けられた係止プレートとを備え、
フランジプレートに上下方向の孔を設けるとともに、該孔に上下方向に挿入されたキー部材を設け、キー部材の上端部が係止プレートの凹状部内に挿入されるとともに、係止プレートの凹状部とキー部材の上端部との間に水平方向及び上下方向に所定の隙間が設けられるように構成し、
フランジプレートの前記各両端部と係止プレートとの隙間に緩衝部材を設けた
ことを特徴とする橋梁用弾性支承。
Between the bridge girder and the support that supports the bridge girder, together with other supports that support the bridge girder in the vertical direction, in the elastic support for bridges that elastically supports the bridge girder in the horizontal direction with respect to the support,
The lower end side is fixed to the support body , the upper end is provided with a flange plate, and an elastic member that is elastically deformable in the horizontal direction,
It is fixed to the bridge girder , and is formed to be able to be locked from both the horizontal direction and the lower side at both ends of the flange plate in the direction perpendicular to the bridge axis and in the bridge axis direction, and provided with a predetermined clearance from the upper surface of the flange plate and the both ends. A locking plate formed on the lower surface and provided with a concave portion ,
A vertical hole is provided in the flange plate, a key member inserted in the vertical direction is provided in the hole, and an upper end portion of the key member is inserted into a concave portion of the locking plate, and a concave portion of the locking plate A predetermined gap is provided in the horizontal and vertical directions between the upper end of the key member,
An elastic bearing for a bridge, characterized in that a buffer member is provided in a gap between each end of the flange plate and the locking plate.
前記係止プレートを、橋桁に固定され、フランジプレートの上面と所定の隙間を設けて配置された橋桁側プレートと、フランジプレートの橋軸直角方向の両端部と所定の隙間を設けて配置されて前記両端部に水平方向に係止可能な一対の第1係止部材と、フランジプレートの橋軸直角方向の両端部と所定の隙間を設けて配置されて前記両端部に下方から係止可能な一対の第2係止部材と、フランジプレートの橋軸方向の両端部と所定の間隔を設けて配置されて前記両端部に水平方向に係止可能な一対の第3係止部材と、フランジプレートの橋軸方向の両端部と所定の間隔を設けて配置されて前記両端部に下方から係止可能な一対の第4係止部材と、各第1係止部材及び各第2係止部材を橋桁側プレートに取付けるための第1取付部材と、各第3係止部材及び各第4係止部材を橋桁側プレートに取付けるための第2取付部材とから構成した
ことを特徴とする請求項1記載の橋梁用弾性支承。
The locking plate is fixed to the bridge girder , and is arranged with a predetermined gap between the bridge girder side plate arranged with a predetermined gap from the upper surface of the flange plate, and both ends of the flange plate in the direction perpendicular to the bridge axis. A pair of first locking members that can be locked in the horizontal direction at both ends, and a predetermined gap between both ends of the flange plate in the direction perpendicular to the bridge axis, and can be locked from below at both ends. A pair of second locking members, a pair of third locking members that are disposed at predetermined intervals from both ends of the flange plate in the bridge axis direction and can be horizontally locked to the both ends, and the flange plate A pair of fourth locking members that are disposed at predetermined intervals from both ends in the bridge axis direction and can be locked to the both ends from below, and each first locking member and each second locking member. A first mounting member for mounting on the bridge girder side plate, Locking members and bridges elastic bearing according to claim 1, characterized by being configured of a second mounting member for mounting the respective fourth engaging member girder side plate.
橋桁と橋桁を支持する支持体との間に橋桁を鉛直方向に支持する他の支承とともに設けられ、橋桁を支持体に対して水平方向に弾性支持する橋梁用弾性支承において、
下端部側が支持体に固定されるとともに、上端部にフランジプレートが設けられ、水平方向に弾性変形可能な弾性部材と、
橋桁に固定され、フランジプレートの橋軸方向及び橋軸直角方向のうち一方向の両端部に水平方向及び下方から係止可能に形成されるとともに、フランジプレートの上面及び前記両端部と所定の隙間を設けて形成され、下面に凹状部が設けられた係止プレートとを備え、
フランジプレートに上下方向の孔を設けるとともに、該孔に上下方向に挿入されたキー部材を設け、キー部材の上端部が係止プレートの凹状部内に挿入されるとともに、係止プレートの凹状部とキー部材の上端部との間に水平方向及び上下方向に所定の隙間が設けられるように構成し、
フランジプレートの前記両端部と係止プレートとの隙間に緩衝部材を設けた
ことを特徴とする橋梁用弾性支承。
Between the bridge girder and the support that supports the bridge girder, together with other supports that support the bridge girder in the vertical direction, in the elastic support for bridges that elastically supports the bridge girder in the horizontal direction with respect to the support,
The lower end side is fixed to the support body , the upper end is provided with a flange plate, and an elastic member that is elastically deformable in the horizontal direction,
It is fixed to the bridge girder , and is formed to be able to be locked from both the horizontal direction and the lower side at both ends in one direction out of the bridge axis direction and the bridge axis perpendicular direction of the flange plate, and the upper surface of the flange plate and a predetermined gap between the both ends. And a locking plate provided with a concave portion on the lower surface ,
A vertical hole is provided in the flange plate, a key member inserted in the vertical direction is provided in the hole, and an upper end portion of the key member is inserted into a concave portion of the locking plate, and a concave portion of the locking plate A predetermined gap is provided in the horizontal and vertical directions between the upper end of the key member,
An elastic bearing for a bridge, wherein a buffer member is provided in a gap between the both end portions of the flange plate and the locking plate.
前記係止プレートを、橋桁に固定され、フランジプレートの上面と所定の隙間を設けて配置された橋桁側プレートと、フランジプレートの前記両端部と所定の隙間を設けて配置されて前記両端部に水平方向に係止可能な一対の第1係止部材と、フランジプレートの前記両端部と所定の隙間を設けて配置されて前記両端部に下方から係止可能な一対の第2係止部材と、各係止部材を橋桁側プレートに取付けるための取付部材とから構成した
ことを特徴とする請求項3記載の橋梁用弾性支承。
The locking plate is fixed to the bridge girder and is arranged with a predetermined gap between the upper surface of the flange plate and a predetermined gap, and the both ends of the flange plate are arranged with a predetermined gap at the both ends. A pair of first locking members that can be locked in the horizontal direction, and a pair of second locking members that are disposed with a predetermined gap from the both ends of the flange plate and that can be locked to the both ends from below. The elastic bearing for a bridge according to claim 3, wherein each of the locking members is constituted by an attachment member for attaching the locking member to the bridge girder side plate.
JP2005085558A 2005-03-24 2005-03-24 Elastic bearing for bridge Expired - Fee Related JP4561424B2 (en)

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