JP3619952B2 - Telescopic device for bridge - Google Patents

Telescopic device for bridge Download PDF

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Publication number
JP3619952B2
JP3619952B2 JP24328898A JP24328898A JP3619952B2 JP 3619952 B2 JP3619952 B2 JP 3619952B2 JP 24328898 A JP24328898 A JP 24328898A JP 24328898 A JP24328898 A JP 24328898A JP 3619952 B2 JP3619952 B2 JP 3619952B2
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JP
Japan
Prior art keywords
bridge
finger
direction perpendicular
fingers
telescopic device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP24328898A
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Japanese (ja)
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JP2000073305A (en
Inventor
俊成 小田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitta Corp
Original Assignee
Nitta Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitta Corp filed Critical Nitta Corp
Priority to JP24328898A priority Critical patent/JP3619952B2/en
Publication of JP2000073305A publication Critical patent/JP2000073305A/en
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Publication of JP3619952B2 publication Critical patent/JP3619952B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の属する技術分野】
【0001】
この発明は、橋梁用伸縮装置に関するものである。
【従来の技術】
【0002】
フィンガー形式の橋梁用伸縮装置は、例えば図8や図9に示すように、隣合う橋桁H,Hの各対向面上部にフィンガー部90を有する表面板材9を図示しないアンカー等で固定配置して構成されており、橋桁H,H相互の遊間に移動してきた輪荷重を双方のフィンガー部90で支持すると共に、橋桁の温度変化等による伸縮を、一方側の表面板材9のフィンガー部90が他方側の表面板材9の隣合うフィンガー部90,90相互間に挿脱される態様で吸収されるようにしてある。
【0003】
しかしながら、上記橋梁用伸縮装置では、車両通行の安全上、橋軸直角方向には大きな隙間を取ることができず、このため、橋軸直角方向の大きな橋桁H,Hの相対移動を吸収することはできない。故に、地震等により橋軸直角方向に橋桁H,Hが大きく相対移動した場合、相対向する表面板材9のフィンガー部90相互が衝突し、フィンガー部90が損傷するだけでなく他の橋梁部材までも損傷する恐れがある。特に、免震設計の橋梁では、橋梁の免震機能までも損なう恐れがある。また、フィンガー部90に損傷が生じた場合、緊急車両の通過ができなくなったりして救助活動に大きな問題となる。
【発明を解決しようとする課題】
【0004】
そこで、この発明では、橋軸直角方向の大きな移動量を吸収できる橋梁用伸縮装置を提供することを課題とする。
【課題を解決するための手段】
【0005】
(請求項1記載の発明)
請求項1記載の発明は、一方側の橋台又は橋桁と他方側の橋桁の対向する部分にそれぞれ固定された基礎部材と、各基礎部材において橋軸直角方向に複数配列され且つ一方側の橋台又は橋桁と他方側の橋桁との間の遊間に突出するフィンガーとを具備し、一方の基礎部材に設けられたフィンガーが、他方の基礎部材に設けられた隣合うフィンガー相互間に遊挿されている橋梁用伸縮装置において、少なくとも一方の基礎部材に配列されているフィンガーは、当該基礎部材に対して橋軸直角方向に揺動可能に取り付けられており、フィンガーと基礎部材とがノックオフ部材で係止された状態となっている。上記発明の橋梁用伸縮装置の機能については、以下の発明の実施の形態の欄で詳述する。
【発明の実施の形態】
【0006】
以下、この発明の実施の形態を図面に従って説明する。
【0007】
(実施形態1)
この実施形態の橋梁用伸縮装置は、図1に示すように、免震装置Mを介して橋脚H’により支持された橋桁H,Hの間に配置されるもので、図1や図2に示す如く橋桁H,Hの対向する上域部分にそれぞれ固定された基礎部材1と、前記橋桁H,H間に形成された遊間Uに突出する態様で各基礎部材1に橋軸直角方向に揺動可能に取り付けられた複数のフィンガー2とを具備すると共に、一方の基礎部材1に取り付けられたフィンガー2の自由端部が、他方の基礎部材1に取り付けられた隣合うフィンガー2,2の自由端部相互間に挿入される態様で、前記遊間Uを塞ぐようにしている。
【0008】
基礎部材1は鋼材により形成された橋軸直角方向に長いもので、図3や図4に示すように、上板11と、下板12と、前記上板11と下板12相互を繋ぐ縦板13と、補強リブ14と、前記上板11と下板12相互間に直立姿勢で架設された複数のピン10とから構成されている。なお、この基礎部材1は、図示しないアンカーボルト等により橋桁H に強固に固定されており、この固定状態において上板11の上面と橋桁Hの上面が略面一となっている。
【0009】
上板11は、図4に示すように、内側縁に半円状の突出部を一定間隔で形成してあり、前記半円の中心点部分にピン10が密嵌される貫通孔11aを穿設して構成してある。また、下板12は、図4に示すように、幅が狭い以外は上記上板11と同様の構成であり、ピン10が密嵌される貫通孔12aを穿設してある。
【0010】
フィンガー2は、図3や図4に示すように、上板11の下面と下板12の上との長さよりも僅かに小さい高さに形成された円筒部21と、この円筒部21に固着されているフィンガー主体20とから構成されている。なお、このフィンガー2では、円筒部21をピン10に外挿された状態では、図3に示すように、フィンガー主体20の基端部上面と上板11の上面とが略一致したものとなっている。
【0011】
ここで、この橋梁用伸縮装置では、図7に示すように、上記縦板13の水平孔13aから突出するノックピンNP部分を円筒部21に形成した凹み部21aに差し込んだものとしてある。
【0012】
したがって、自動車通過時の振動によってフィンガー2が揺動することはなく、対向するフィンガー2,2相互が衝突するような橋桁H,Hの橋軸直角方向の相対移動があった場合にのみノックピンNPが剪断されてフィンガー2が揺動(図5の状態からピン10の軸心として図6の状態の如き揺動)する。その結果、橋桁H,Hが橋軸直角方向に大きく相対移動した場合でも、フィンガー2が破損することがなく前記相対移動を十分に吸収でき、他の橋梁部材が損傷するような事態を回避できる。
【0013】
なお、上記ノックオフ構造は上記形態に限定されず、フィンガー2と基礎部材1とがノックオフ部材で係止された状態になっているものであれば全ての構造を採用できる。
【0014】
(その他の実施形態)
上記実施実施形態1では、橋桁と橋桁との間にこの発明の橋梁用伸縮装置を設けてあるが、橋桁と橋台との間にこの発明の橋梁用伸縮装置を設けることも可能である。
【0015】
また、上記実施形態1では、両方のフィンガー2,2が揺動する構成としているが、一方のフィンガー2のみを揺する構成としてもよい。
【0016】
さらに、上記実施形態1に関して、フィンガーが薄いゴム層で被覆されていることが好ましい。フィンガー相互の衝突音の発生が抑制できるからである。
【発明の効果】
【0017】
この発明は上記構成を有するものであるから以下の効果を奏する。
【0018】
上記発明の実施の形態の欄の記載内容から、橋軸直角方向の大きな移動量を吸収できる橋梁用伸縮装置を提供できた。
【図面の簡単な説明】
【0019】
【図1】この発明の実施形態1の橋梁用伸縮装置が、免震装置を介して橋脚に支持された橋梁用伸縮装置の正面図。
【図2】前記橋梁用伸縮装置の斜視図。
【図3】図2のX−X断面図。
【図4】前記橋梁用伸縮装置の分解斜視図。
【図5】相互に対向する橋桁が橋軸直角方向に相対移動していない状態の橋梁用伸縮装置の平面図。
【図6】相互に対向する橋桁が橋軸直角方向に相対移動した状態の橋梁用伸縮装置の平面図。
【図7】前記橋梁用伸縮装置の部分断面図。
【図8】先行技術の橋梁用伸縮装置の断面図。
【図9】先行技術の橋梁用伸縮装置の斜視図。
【符号の説明】
【0020】
H 橋梁
1 基礎部材
2 フィンガー
10 ピン
11 上板
12 下板
13 縦板
BACKGROUND OF THE INVENTION
[0001]
The present invention relates to a bridge telescopic device.
[Prior art]
[0002]
For example, as shown in FIGS. 8 and 9, the finger-type expansion and contraction device for a bridge has a surface plate member 9 having finger portions 90 on the upper surfaces of adjacent bridge girders H and H fixed by an anchor or the like (not shown). The wheel load that has moved between the bridge girders H and H is supported by both finger portions 90, and the finger portions 90 of the surface plate material 9 on one side are expanded and contracted due to temperature changes of the bridge girders. It is made to absorb in the aspect inserted / removed between the adjacent finger parts 90 and 90 of the surface plate material 9 of the side.
[0003]
However, in the above-mentioned bridge expansion and contraction device, a large gap cannot be formed in the direction perpendicular to the bridge axis for the safety of vehicle traffic, and therefore, the relative movement of the large bridge girders H and H in the direction perpendicular to the bridge axis can be absorbed. I can't. Therefore, when the bridge girders H and H move greatly relative to each other in the direction perpendicular to the bridge axis due to an earthquake or the like, the finger portions 90 of the facing surface plate 9 collide with each other, not only damage the finger portions 90 but also other bridge members. Can also be damaged. In particular, in a seismic isolation design bridge, the seismic isolation function of the bridge may be impaired. In addition, when the finger portion 90 is damaged, the emergency vehicle cannot pass, which causes a major problem in the rescue operation.
[Problems to be solved by the invention]
[0004]
Accordingly, an object of the present invention is to provide a bridge extension / contraction device that can absorb a large amount of movement in a direction perpendicular to the bridge axis.
[Means for Solving the Problems]
[0005]
(Invention of Claim 1)
The invention described in claim 1 includes a foundation member fixed to the opposite side of the abutment on one side or the bridge girder and the other side of the bridge girder, a plurality of base members arranged in the direction perpendicular to the bridge axis, and the abutment on one side or A finger projecting between the bridge beam and the bridge beam on the other side, and a finger provided on one foundation member is loosely inserted between adjacent fingers provided on the other foundation member In the expansion and contraction device for bridges, the fingers arranged on at least one foundation member are swingably attached to the foundation member in a direction perpendicular to the bridge axis, and the fingers and the foundation member are locked by a knock-off member. It has become a state. The function of the bridge expansion and contraction device of the present invention will be described in detail in the section of the embodiment of the present invention below.
DETAILED DESCRIPTION OF THE INVENTION
[0006]
Embodiments of the present invention will be described below with reference to the drawings.
[0007]
(Embodiment 1)
As shown in FIG. 1, the bridge telescopic device of this embodiment is disposed between bridge girders H and H supported by a bridge pier H ′ via a seismic isolation device M, as shown in FIGS. 1 and 2. As shown, the base member 1 fixed to the upper region where the bridge beams H, H are opposed to each other, and the base member 1 swings in a direction perpendicular to the bridge axis in a manner of projecting between the gaps U formed between the bridge beams H, H. A plurality of fingers 2 movably attached, and the free ends of the fingers 2 attached to one base member 1 are free of adjacent fingers 2 and 2 attached to the other base member 1 The play space U is closed in a manner of being inserted between the end portions.
[0008]
The base member 1 is made of steel and is long in the direction perpendicular to the bridge axis. As shown in FIGS. 3 and 4, the upper plate 11, the lower plate 12, and the vertical plate that connects the upper plate 11 and the lower plate 12 to each other. 13, reinforcing ribs 14, and a plurality of pins 10 erected in an upright posture between the upper plate 11 and the lower plate 12. The foundation member 1 is firmly fixed to the bridge girder H by anchor bolts (not shown). In this fixed state, the upper surface of the upper plate 11 and the upper surface of the bridge girder H are substantially flush.
[0009]
As shown in FIG. 4, the upper plate 11 is formed with semicircular protrusions on the inner edge at regular intervals, and has a through hole 11a into which the pin 10 is closely fitted at the center point of the semicircle. It is configured. Further, as shown in FIG. 4, the lower plate 12 has the same configuration as the upper plate 11 except for its narrow width, and has a through hole 12a into which the pin 10 is closely fitted.
[0010]
As shown in FIGS. 3 and 4, the finger 2 has a cylindrical portion 21 formed at a height slightly smaller than the length of the lower surface of the upper plate 11 and the lower plate 12, and is fixed to the cylindrical portion 21. It is comprised from the finger main body 20 currently made. In the finger 2, when the cylindrical portion 21 is extrapolated to the pin 10, the upper surface of the base end portion of the finger main body 20 and the upper surface of the upper plate 11 are substantially coincident as shown in FIG. 3. ing.
[0011]
Here, in this bridge extension / contraction device, as shown in FIG. 7, the knock pin NP portion protruding from the horizontal hole 13 a of the vertical plate 13 is inserted into the recess portion 21 a formed in the cylindrical portion 21.
[0012]
Therefore, the finger 2 does not oscillate due to the vibration when passing through the automobile, and the knock pin NP only when there is a relative movement in the direction perpendicular to the bridge axis of the bridge beams H and H where the opposing fingers 2 and 2 collide with each other. Is sheared and the finger 2 swings (from the state of FIG. 5 to the state of FIG. 6 as the axis of the pin 10). As a result, even when the bridge girders H and H are relatively moved relative to each other in the direction perpendicular to the bridge axis, the finger 2 is not damaged and the relative movement can be sufficiently absorbed, and the situation where other bridge members are damaged can be avoided. .
[0013]
In addition, the said knock-off structure is not limited to the said form, All structures can be employ | adopted if the finger 2 and the base member 1 are the states latched by the knock-off member.
[0014]
(Other embodiments)
In the first embodiment, the bridge telescopic device of the present invention is provided between the bridge girders. However, the bridge telescopic device of the present invention may be provided between the bridge girders and the abutment.
[0015]
In the first embodiment, both the fingers 2 and 2 swing. However, only one finger 2 may swing.
[0016]
Furthermore, with respect to the first embodiment, it is preferable that the fingers are covered with a thin rubber layer. This is because the generation of collision sound between fingers can be suppressed.
【The invention's effect】
[0017]
Since the present invention has the above-described configuration, the following effects can be obtained.
[0018]
From the description in the column of the embodiment of the present invention, a bridge expansion and contraction device capable of absorbing a large amount of movement in the direction perpendicular to the bridge axis can be provided.
[Brief description of the drawings]
[0019]
FIG. 1 is a front view of a bridge expansion / contraction device in which a bridge expansion / contraction device according to Embodiment 1 of the present invention is supported by a bridge pier via a seismic isolation device.
FIG. 2 is a perspective view of the bridge telescopic device.
3 is a cross-sectional view taken along line XX in FIG.
FIG. 4 is an exploded perspective view of the bridge telescopic device.
FIG. 5 is a plan view of a bridge expansion and contraction device in a state where the bridge beams facing each other are not relatively moved in the direction perpendicular to the bridge axis.
FIG. 6 is a plan view of a bridge expansion / contraction device in a state in which mutually facing bridge girders are relatively moved in a direction perpendicular to the bridge axis.
FIG. 7 is a partial cross-sectional view of the bridge telescopic device.
FIG. 8 is a cross-sectional view of a prior art bridge telescopic device.
FIG. 9 is a perspective view of a prior art bridge telescopic device.
[Explanation of symbols]
[0020]
H Bridge 1 Foundation member 2 Finger
10 pin
11 Upper plate
12 Lower plate
13 Vertical plate

Claims (1)

一方側の橋台又は橋桁と他方側の橋桁の対向する部分にそれぞれ固定された基礎部材と、各基礎部材において橋軸直角方向に複数配列され且つ一方側の橋台又は橋桁と他方側の橋桁との間の遊間に突出するフィンガーとを具備し、一方の基礎部材に設けられたフィンガーが、他方の基礎部材に設けられた隣合うフィンガー相互間に遊挿されている橋梁用伸縮装置において、少なくとも一方の基礎部材に配列されているフィンガーは、当該基礎部材に対して橋軸直角方向に揺動可能に取り付けられており、フィンガーと基礎部材とがノックオフ部材で係止された状態となっていることを特徴とする橋梁用伸縮装置。A foundation member fixed to the opposite part of the abutment or bridge girder on one side and the bridge girder on the other side, and a plurality of foundation members arranged in a direction perpendicular to the bridge axis in each foundation member, and the abutment or bridge girder on one side and the bridge girder on the other side At least one of the expansion and contraction devices for bridges, wherein the fingers provided on one base member are inserted between adjacent fingers provided on the other base member. The fingers arranged on the foundation member are attached so as to be swingable in a direction perpendicular to the bridge axis with respect to the foundation member, and the fingers and the foundation member are locked by a knock-off member. A telescopic device for bridges.
JP24328898A 1998-08-28 1998-08-28 Telescopic device for bridge Expired - Fee Related JP3619952B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24328898A JP3619952B2 (en) 1998-08-28 1998-08-28 Telescopic device for bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24328898A JP3619952B2 (en) 1998-08-28 1998-08-28 Telescopic device for bridge

Publications (2)

Publication Number Publication Date
JP2000073305A JP2000073305A (en) 2000-03-07
JP3619952B2 true JP3619952B2 (en) 2005-02-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100406650C (en) * 2005-06-05 2008-07-30 徐斌 Modular comb type expansion joint installation of girder capable of resisting super displacement
JP2007032057A (en) * 2005-07-26 2007-02-08 Concrete Fukugo Kozo Kenkyu Kiko:Kk Expansion device of bridge joint section and joint method of bridge
JP5384256B2 (en) * 2009-08-26 2014-01-08 鹿島建設株式会社 Bridge telescopic device

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