JPH11315510A - Connecting bridge fall prevention device - Google Patents
Connecting bridge fall prevention deviceInfo
- Publication number
- JPH11315510A JPH11315510A JP13738598A JP13738598A JPH11315510A JP H11315510 A JPH11315510 A JP H11315510A JP 13738598 A JP13738598 A JP 13738598A JP 13738598 A JP13738598 A JP 13738598A JP H11315510 A JPH11315510 A JP H11315510A
- Authority
- JP
- Japan
- Prior art keywords
- prevention device
- bridge
- connection
- connecting member
- abutment
- 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.)
- Granted
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、特に多径間連続桁
に用いて好適な連結式落橋防止装置に属する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting type fall prevention device which is particularly suitable for a multi-span continuous girder.
【0002】[0002]
【従来の技術】近年、道路橋、鉄道橋等の橋梁分野にお
いては、経済性、走行性、安全性より橋桁が連続化し、
長くなっている。特に、阪神大震災以降、安全性が重視
されて、橋桁の連続化が顕著となっている。蓋し、1本
の橋桁が多径間にわたり架設されていれば、仮に橋桁の
両端が落橋しても残余の当該橋脚で橋桁を支承する可能
性が高くなるからである。2. Description of the Related Art In recent years, in the field of bridges such as road bridges and railway bridges, bridge girder has become continuous due to economical efficiency, running performance and safety.
It is getting longer. In particular, since the Great Hanshin Earthquake, safety has been emphasized, and the continuation of bridge girder has become remarkable. This is because, if one bridge girder is covered over multiple spans, even if both ends of the bridge girder are dropped, there is a high possibility that the bridge girder will be supported by the remaining pier.
【0003】そして、さらに安全性を高めるべく落橋防
止の見地から連続桁においても落橋防止装置を設置する
ことが義務づけられている(日本道路協会編『道路橋の
耐震設計に関する資料』等)。In order to further enhance safety, it is obligatory to install a bridge prevention device in continuous girder from the viewpoint of bridge prevention (for example, "Data on Seismic Design of Road Bridge" edited by Japan Road Association).
【0004】従来から、係る落橋防止装置として種々の
ものが開発提供されている。その内の一つが隣接する橋
桁同士を連結する連結式落橋防止装置である。Conventionally, various devices have been developed and provided as such a bridge prevention device. One of them is a connection-type bridge prevention device that connects adjacent bridge girders.
【0005】ところで、橋桁が長くなると、橋桁が橋台
又は橋脚にかかる「桁かかり長」が長くなる。『道路橋
の耐震設計に関する資料』によれば、「桁かかり長」は
橋桁の長さに基づいて算出されるからである(SE:上
記資料2.6.1)。[0005] By the way, when the bridge girder becomes longer, the "girder length" of the bridge girder on the abutment or pier becomes longer. According to "documentation on Seismic Design of Highway Bridges", "digit takes length" is because is calculated based on the length of the bridge girder (S E: the article 2.6.1).
【0006】それに伴い、「桁かかり長」に比例する設
計最大移動量(=弾性支承の変形量)が大きくなる(S
F:上記資料2.6.3)。Accordingly, the maximum design movement (= the amount of deformation of the elastic bearing) in proportion to the "girder length" increases (S
F : The above document 2.6.3).
【0007】その為、連結式落橋防止装置のストローク
を長くする必要があった。[0007] Therefore, it was necessary to lengthen the stroke of the connection type fall prevention device.
【0008】[0008]
【発明が解決しようとする課題】しかしながら、従来技
術に係る連結式落橋防止装置のストロークをそのまま長
くすると以下に掲げる問題点が生じた。However, if the stroke of the articulated bridge prevention device according to the prior art is lengthened as it is, the following problems arise.
【0009】PC鋼材等の緊張材の端部に設けられたバ
ネをストロークの長さに合わせるとバネを軟らかくしな
ければならず、その結果、緊張材が撓んでしまうという
問題点があった。When the spring provided at the end of the tendon such as PC steel is adjusted to the stroke length, the spring must be softened, and as a result, the tendon is bent.
【0010】また、ストロークを長くすると密着高さ
(バネが完全に縮んだ状態の高さ=線径×巻数)が大き
くなる為、密着高さよりも先に収縮を始めるセーフティ
ーストッパーを厚くしなければならなかった。In addition, if the stroke is lengthened, the contact height (height in a state where the spring is completely contracted = wire diameter × number of turns) increases, so that the safety stopper which starts contracting before the contact height must be thickened. did not become.
【0011】また、バネ、セーフティストッパーが長く
なるとそれに比例して重量が大きくなった。Further, as the length of the spring and the safety stopper increases, the weight increases in proportion thereto.
【0012】特に多径間の連続桁程、これらの問題点が
大きい。In particular, these problems are greater in a continuous girder between multiple diameters.
【0013】本発明は斯かる問題点を鑑みてなされたも
のであり、その目的とするところは、緊張材の撓みを解
消し、セーフティーストッパーを薄くでき、且つ重量を
小さくすることができる連結式落橋防止装置を提供する
点にある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to eliminate the bending of the tendon, to reduce the thickness of the safety stopper, and to reduce the weight. It is in providing a fall prevention device.
【0014】[0014]
【課題を解決するための手段】請求項1記載の発明の要
旨は、橋桁と、それに隣接する橋桁又は橋台とに懸け渡
される連結材の端部を前記橋桁又は橋台に固定して落橋
を防止する連結式落橋防止装置であって、前記連結材の
端部側に位置して前記連結材に挿通される筒体と、該筒
体を、前記連結材の端部方向に付勢する付勢手段と、前
記連結材の端部に固定される固定具と、該連結材と前記
筒体との相対移動を拘束し、所定応力が生じたときに破
断する接続・破断部材とを有することを特徴とする連結
式落橋防止装置に存する。請求項2記載の発明の要旨
は、前記筒体は支圧板を介して付勢されることを特徴と
する請求項1記載の連結式落橋防止装置に存する。請求
項3記載の発明の要旨は、前記筒体にはフランジが設け
られ、該フランジと前記橋脚又は前記橋台との間に前記
付勢手段が介装されたことを特徴する請求項1に記載の
連結式落橋防止装置に存する。請求項4記載の発明の要
旨は、前記付勢手段と前記橋桁又は前記橋台との間に支
圧板が設けられたことを特徴する請求項1又は3に記載
の連結式落橋防止装置に存する。請求項5記載の発明の
要旨は、橋桁と、それに隣接する橋桁又は橋台とに懸け
渡される連結材の端部を前記橋桁又は橋台に固定して落
橋を防止する連結式落橋防止装置であって、前記連結材
の端部側に位置して前記連結材に挿通される筒体と、前
記連結材の端部に固定される固定具と、該連結材と前記
筒体との相対移動を拘束し、所定応力が生じたときに破
断する接続・破断部材とを有することを特徴とする連結
式落橋防止装置に存する。請求項6記載の発明の要旨
は、前記固定具は、ナットと座金であり、前記接続・破
断部材は、前記筒体を挿通し、且つ前記座金の側面に螺
着されるものであることを特徴とする請求項1乃至5の
いずれかに記載の連結式落橋防止装置に存する。請求項
7記載の発明の要旨は、前記接続・破断部材は、前記筒
体を挿通し、且つ前記座金を掛止するものであることを
特徴とする請求項1乃至6のいずれかに記載の連結式落
橋防止装置に存する。請求項8記載の発明の要旨は、前
記支圧板の、橋桁又は橋台側には緩衝材が介装されてい
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
連結式落橋防止装置に存する。請求項9記載の発明の要
旨は、橋桁と、それに隣接する橋桁又は橋台とに懸け渡
される連結材の端部を前記橋桁又は前記橋台に固定して
落橋を防止する連結式落橋防止装置であって、前記連結
材の端部側に位置して前記連結材に挿通される筒体と、
前記連結材の端部に固定される固定具と、該連結材と前
記筒体との相対移動を拘束する拘束部材とを有すること
を特徴とする連結式落橋防止装置に存する。請求項10
記載の発明の要旨は、前記筒体の端部に、キャップが取
り付けられていることを特徴とした請求項1乃至9のい
ずれかに記載の連結式落橋防止装置に存する。請求項1
1記載の発明の要旨は、前記支圧板はケーシングにより
覆われていることを特徴とする請求項1乃至10のいず
れかに記載の連結式落橋防止装置に存する。The gist of the present invention resides in that an end of a connecting member suspended between a bridge girder and a bridge girder or abutment adjacent thereto is fixed to the bridge girder or abutment to prevent dropping of a bridge. A tubular body positioned at an end of the connecting member and inserted through the connecting member, and a biasing member for biasing the tubular body toward an end of the connecting member. Means, a fixture fixed to an end of the connecting member, and a connection / rupture member that restrains relative movement between the connecting member and the cylindrical body and breaks when a predetermined stress is generated. It is in the feature of the connection type fall prevention device. The gist of the invention according to claim 2 resides in the connection-type fall prevention device according to claim 1, wherein the cylinder is urged via a support plate. The gist of the invention described in claim 3 is that the cylinder is provided with a flange, and the urging means is interposed between the flange and the pier or the abutment. In the articulated fall prevention device. The gist of the invention according to claim 4 resides in a connection type fall prevention device according to claim 1 or 3, wherein a supporting plate is provided between the urging means and the bridge girder or the abutment. The gist of the invention according to claim 5 is a connection type fall prevention device for fixing an end portion of a connecting material suspended between a bridge girder and an adjacent bridge girder or abutment to the bridge girder or abutment to prevent a bridge from falling. A cylindrical member positioned at an end of the connecting member and inserted through the connecting member, a fixing member fixed to an end of the connecting member, and restricting relative movement between the connecting member and the cylindrical member. A connection / rupture member that breaks when a predetermined stress is generated. The gist of the invention according to claim 6 is that the fixing tool is a nut and a washer, and the connecting / breaking member is inserted through the cylinder and screwed to a side surface of the washer. The present invention resides in a connecting type fall prevention device according to any one of claims 1 to 5. The gist of the invention according to claim 7 is that the connection / rupture member penetrates the tubular body and locks the washer. It is in the articulated bridge prevention device. The gist of the invention according to claim 8 is that the cushioning material is interposed on the bridge girder or the abutment side of the supporting plate, wherein the connection type fall prevention device according to any one of claims 1 to 7 is provided. Exists. The gist of the invention according to claim 9 is a connection type fall prevention device for fixing a bridge girder and an end portion of a connecting material suspended between the bridge girder and an abutment to the bridge girder or the abutment to prevent a bridge from falling. A cylindrical body that is inserted into the connecting member at an end of the connecting member,
There is provided a connection-type bridge prevention device, comprising: a fixing member fixed to an end portion of the connection member; and a restraining member for restraining relative movement between the connection member and the cylindrical body. Claim 10
The gist of the present invention resides in a connection-type fall prevention device according to any one of claims 1 to 9, wherein a cap is attached to an end of the cylindrical body. Claim 1
The gist of the invention described in (1) resides in the connection type fall prevention device according to any one of claims 1 to 10, wherein the support plate is covered by a casing.
【0015】[0015]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳細に説明する。図1に示すように、本実施
の形態に係る連結式落橋防止装置10は、橋桁同士を連
結することにより落橋するのを防止するものであり、図
面を横長に見て左側の装置が本実施の形態に係る連結式
落橋防止装置10である。右側のものが通常の連結式落
橋防止装置10からコイルスプリング12を抜いたもの
である。図中、符号Cが横桁であり、本実施の形態にお
いては横桁にとりつけられている。図1乃至図4に示す
連結式落橋防止装置10は請求項1及び2に記載の発明
の実施の形態である。Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, a connection-type bridge prevention device 10 according to the present embodiment is to prevent a bridge from being dropped by connecting bridge girders. It is a connection type fall prevention device 10 according to the embodiment. On the right side, the coil spring 12 has been removed from the normal connection-type fall prevention device 10. In the figure, reference symbol C denotes a horizontal beam, which is attached to the horizontal beam in the present embodiment. 1 to 4 is an embodiment of the invention described in claims 1 and 2. FIG.
【0016】PC鋼より線L(連結材)と、PC鋼より
線Lの端部を覆うサポート管11(筒体)と、PC鋼よ
り線Lの端部方向にサポート管11を付勢するコイルス
プリング12(付勢手段)と、サポート管11とコイル
スプリング12との間に介装されている支圧板13と、
PC鋼より線Lの端部に螺着されたWナット14a及び
座金14b(固定具)と、サポート管11とPC鋼より
線Lとを接続するノックオフボルト15(接続・破断部
材)とを備えている。[0016] The support tube 11 (cylindrical body) covering the end of the PC steel stranded wire L (connecting material), the PC steel stranded wire L, and the support tube 11 are urged toward the end of the PC steel stranded wire L. A coil spring 12 (biasing means), a support plate 13 interposed between the support tube 11 and the coil spring 12,
It comprises a W nut 14a and a washer 14b (fixing tool) screwed to the end of the PC steel strand L, and a knock-off bolt 15 (connection / breaking member) for connecting the support pipe 11 and the PC strand L. ing.
【0017】PC鋼より線Lは、両端部に雄ねじが切ら
れたスリーブLsが固着されてWナット14aを螺着可
能となっており、残部はポリエチレン被覆されている。The PC steel stranded wire L is provided with sleeves Ls having male threads cut at both ends, so that the W nut 14a can be screwed thereon, and the remainder is coated with polyethylene.
【0018】サポート管11は、両端が開孔され、外側
面にフランジ11aが形成され支圧板13に接触してい
る。このフランジ11aの径は、支圧板13と同じであ
る。サポート管11の端部に、防錆キャップ16が取り
付けられている。The support tube 11 is opened at both ends, and has a flange 11a formed on the outer surface thereof, and is in contact with the support plate 13. The diameter of the flange 11a is the same as that of the support plate 13. A rust prevention cap 16 is attached to an end of the support tube 11.
【0019】支圧板13は、中心にPC鋼より線Lを挿
通するための孔が開孔され、外側面は防錆被覆されてた
円盤状の鋼板である。コイルスプリング12からの付勢
力をサポート管11に伝達している。The supporting plate 13 is a disc-shaped steel plate having a hole formed at the center thereof through which a PC stranded wire L is inserted, and having an outer surface coated with rust prevention. The urging force from the coil spring 12 is transmitted to the support tube 11.
【0020】コイルスプリング12は、支圧板13と横
桁との間に介装されている。The coil spring 12 is interposed between the support plate 13 and the cross beam.
【0021】ノックオフボルト15は、この固定具とサ
ポート管11との相対移動を拘束し、所定応力が生じた
ときに破断するものである。The knock-off bolt 15 restrains the relative movement between the fixture and the support tube 11 and breaks when a predetermined stress is generated.
【0022】座金14bは防錆被覆され、その側面に
は、雌ねじが径方向に沿って切られており、ノックオフ
ボルト15が螺着されている。The washer 14b is rust-proof coated, and a female screw is cut radially on a side surface thereof, and a knock-off bolt 15 is screwed.
【0023】さらに、支圧板13の、橋桁側にはセーフ
ティストッパー17(緩衝材)が介装されている。セー
フティストッパー17は、コイルスプリング12の端部
を挿入可能な孔が中央に開孔されたドーナツ状の物でク
ロロプレンゴム製のものである。Further, a safety stopper 17 (buffer) is interposed on the bridge girder side of the support plate 13. The safety stopper 17 is made of chloroprene rubber and has a donut shape in which a hole into which the end of the coil spring 12 can be inserted is opened at the center.
【0024】また、支圧板13、セーフティーストッパ
ーはケーシングにより覆われている。The support plate 13 and the safety stopper are covered by a casing.
【0025】次に、連結式落橋防止装置10の動作につ
いてを説明する。Next, the operation of the articulated bridge prevention device 10 will be described.
【0026】図2に示す状態は、静止状態(無振動)で
ある。The state shown in FIG. 2 is a stationary state (no vibration).
【0027】振動が生じ、橋桁間に相対変位が生じる
と、図3に示すようにスプリングが退縮し、サポート管
11のフランジ11aにセーフティーストッパーに当接
する。セーフティーストッパーに当接するまでのストロ
ークで、小・中規模の地震、活荷重、温度伸縮等を受け
持つ。換言すれば、コイルスプリング12とセーフティ
ーストッパーとの長さで定まる前記ストロークを、小・
中規模の地震等による振幅を吸収できる程度の長さにし
ておけばよい。When vibration occurs and a relative displacement occurs between the bridge girders, the spring retracts as shown in FIG. 3 and abuts on the flange 11a of the support pipe 11 with the safety stopper. Responsible for small / medium-scale earthquakes, live loads, temperature expansion / contraction, etc. with the stroke until it comes into contact with the safety stopper. In other words, the stroke determined by the length of the coil spring 12 and the safety stopper is reduced by a small
The length should be long enough to absorb the amplitude due to a medium-scale earthquake or the like.
【0028】大規模の地震が生じると橋桁間の相対変位
が大きくなり、図3に示すセーフティーストッパーにサ
ポート管11のフランジ11aが当接した状態からさら
に紙面右方向にPC鋼材が引かれ、図4に示すように、
ノックオフボルト15に破断応力が生じて破断し、座金
14bが支圧板13を介してセーフティーストッパーに
当接する。斯かる状態は、従来技術で述べた設計最大移
動量SFに達する前に生じることが望ましい。通常、弾
性支承の許容変形量も設計最大移動量SFよりも大きく
設計されているので、弾性支承も破壊されない。When a large-scale earthquake occurs, the relative displacement between the bridge girders increases, and the PC steel is further pulled rightward from the state in which the flange 11a of the support pipe 11 is in contact with the safety stopper shown in FIG. As shown in 4,
The rupture stress is generated in the knock-off bolt 15, and the knock-off bolt 15 is ruptured, and the washer 14b contacts the safety stopper via the support plate 13. It is desirable that such a state occurs before the design maximum movement amount S F described in the related art is reached. Usually, because it is designed to be larger than the allowable deformation amount designed maximum travel S F of the elastic bearing, also not destroyed elastic support.
【0029】実施の形態に係る連結式落橋防止装置10
は上記の如く構成されているので、以下に掲げる効果を
奏する。[0029] The articulated bridge prevention device 10 according to the embodiment.
Is configured as described above, and has the following effects.
【0030】設計最大移動量のうち、温度変化、活荷
重、及び小中規模の地震による移動量のみをバネで対応
し、設計最大移動量にまで至るような大地震による移動
量はノックオフボルト15の破断又はサポート管11の
破壊による緊張材端部の移動の確保により対応させる。
その結果、バネの長さを長くすることなく、連続桁にも
適用することができる。Of the maximum design travel, only the temperature change, live load, and travel due to small and medium scale earthquakes are handled by springs, and the travel due to a large earthquake up to the design maximum travel is knock-off bolt 15. This is achieved by ensuring the movement of the tendon end due to the breakage of the support tube 11 or the breakage of the support tube 11.
As a result, the present invention can be applied to continuous girders without increasing the length of the spring.
【0031】本実施の形態に係る連結式落橋防止装置1
0によればバネの係数を小さくしなくとも済むので緊張
材の撓みを解消することができる。また、セーフティー
ストッパーを薄くでき、且つ重量を小さくすることがで
きる。The articulated bridge prevention device 1 according to the present embodiment.
According to 0, it is not necessary to reduce the coefficient of the spring, so that the bending of the tendon can be eliminated. Also, the safety stopper can be made thinner and the weight can be made smaller.
【0032】また、サポート管11の長さを変えるだけ
で、設計最大移動量SFにも対応することができ、しか
もコイルスプリング12の長さを変える必要がないので
PC鋼より線Lが撓むことがない。Also, by changing the length of the support tube 11, it is possible to cope with the design maximum movement amount S F , and since it is not necessary to change the length of the coil spring 12, the PC steel stranded wire L is bent. I have no choice.
【0033】また、ノックオフボルト15の強度・太さ
を変えるだけで作動時期を任意に設定することができ
る。Further, the operation timing can be arbitrarily set only by changing the strength and thickness of the knock-off bolt 15.
【0034】また、スリーブLsの長さを短くすること
ができる。Further, the length of the sleeve Ls can be shortened.
【0035】また、工場において組み立てて搬入可能で
あり、したがって、橋桁への設置が容易である。係る場
合にはPC鋼より線Lの反対側のみを組み立てればよ
い。Further, it is possible to assemble and carry in the factory, and therefore, it is easy to install the bridge girder. In such a case, only the opposite side of the PC stranded wire L may be assembled.
【0036】また、従来技術に係る連結式落橋防止装置
10に必要な受台が不要である。Further, a cradle required for the articulated bridge-preventing device 10 according to the prior art is not required.
【0037】また、小・中規模地震よる振動はコイルス
プリング12で吸収し、ノックオフボルト15が破断さ
れないようにすることが可能なので、メンテナンスが容
易である。なお、大規模地震によりノックオフボルト1
5が破断した場合でも、ノックオフボルト15のみを交
換すればよいので、簡便且つ安価に修復することができ
る。In addition, vibrations due to small / medium-scale earthquakes can be absorbed by the coil spring 12 and the knock-off bolt 15 can be prevented from being broken, so that maintenance is easy. The knock-off bolt 1
Even when 5 is broken, only the knock-off bolt 15 needs to be replaced, so that repair can be performed simply and inexpensively.
【0038】なお、本実施の形態においては橋桁同士を
連結したが、本発明はそれに限定されず、橋桁を橋台
等、本発明を適用する上で好適なものに適用することが
できる。In the present embodiment, the bridge girders are connected to each other. However, the present invention is not limited to this, and the bridge girders can be applied to a bridge girder or the like suitable for applying the present invention.
【0039】また、上記実施の形態ではサポート管11
に設けられたフランジ11a外側に設けられたが、内側
に設けることもできる。In the above embodiment, the support tube 11
Although it is provided on the outside of the flange 11a provided in the above, it may be provided on the inside.
【0040】また、上記携帯においては横桁に直接設置
したが、ブラケットを用いて主桁側面等にも設置するこ
とができる。Further, in the above-mentioned portable device, it is installed directly on the horizontal girder, but it can also be installed on the side of the main girder using a bracket.
【0041】また、接続・破断部材としてノックオフボ
ルト15を適用したが、棒状の掛止部材等、本発明を実
施する上で好適なものにすることができる。係る場合に
は座金の、横桁側の面に掛止させればよい。Although the knock-off bolt 15 is used as the connecting / breaking member, a rod-shaped hooking member or the like can be made suitable for practicing the present invention. In such a case, the washer may be hooked on the side of the side beam.
【0042】また、図5に示す連結式落橋防止装置20
の如く、筒体に径方向外側に延在するリング状の係止フ
ランジ21が設けられ、この係止フランジ21と橋脚又
は橋台との間に付勢手段22を介装することもできる。
斯かる連結式落橋防止装置の動作を図6及び図7に示
す。なお、係止フランジは径方向に不連続であってもよ
く、また、付勢手段を係止可能な形状であればよい。図
5乃至図7に示す連結式落橋防止装置20は請求項3及
び4に記載の発明の実施の形態である。Further, the connection type fall prevention device 20 shown in FIG.
As described above, the cylindrical body is provided with a ring-shaped locking flange 21 extending radially outward, and a biasing means 22 may be interposed between the locking flange 21 and the pier or abutment.
FIGS. 6 and 7 show the operation of such an articulated bridge prevention device. Note that the locking flange may be discontinuous in the radial direction, and may have any shape as long as the urging means can be locked. The connection type fall prevention device 20 shown in FIGS. 5 to 7 is an embodiment of the invention described in claims 3 and 4.
【0043】また、図8に示すごとく、付勢手段を他方
の連結式落橋防止装置(従来技術)Pに備え、本発明に
係る連結式落橋防止装置30には用いないようにするこ
ともできる。連結式落橋防止装置30は、請求項5乃至
8の何れかに記載の発明の実施の形態である。As shown in FIG. 8, the biasing means may be provided in the other connection-type bridge prevention device (prior art) P, and may not be used in the connection-type bridge prevention device 30 according to the present invention. . The connection type fall prevention device 30 is an embodiment of the invention according to any one of claims 5 to 8.
【0044】また、図9に示す連結式落橋防止装置40
ごとく、ノックオフボルトを省き、筒体43,44,4
5自体を破壊させて、大振幅に対応できるようにするこ
ともできる。図9は連結式落橋防止装置40が潰れた状
態を示している。図中において符号は、PC鋼より線L
と筒体との相対移動を拘束する拘束ボルト41(拘束部
材)であり、座金42に螺着されている。拘束ボルト4
1は、大規模地震による振動でも破断しないような鋼材
・径をなしており、筒体の方が先に破壊される。斯かる
筒体の形状の例を図10乃至図12に示す。図10に示
す筒体43は蛇腹状をなして潰れやすくなっている。ま
た、図11に示す筒体44は径方向外側に膨出して潰れ
やすくなっている。また、図12に示す筒体45は側面
にスリットが周方向に等間隔を介して長手方向に沿って
設けられている。図10乃至図12における右側が筒体
43,44,45の側面図、左側が筒体43,44,4
5の正面図である。図9乃至図12に示す連結式落橋防
止装置40は、請求項9乃至11に記載の発明の実施の
形態である。Further, the connection type fall prevention device 40 shown in FIG.
As a result, the knock-off bolt is omitted, and the cylindrical bodies 43, 44, 4
5 itself can be destroyed so that it can cope with large amplitudes. FIG. 9 shows a state in which the connection type fall prevention device 40 is crushed. In the drawing, the symbol is PC steel strand L
Bolt 41 (restraining member) for restraining relative movement between the cylinder and the cylinder, and is screwed to the washer 42. Restraint bolt 4
Reference numeral 1 denotes a steel material and diameter that does not break even when vibrated by a large-scale earthquake, and the cylindrical body is destroyed first. Examples of the shape of such a cylindrical body are shown in FIGS. The cylindrical body 43 shown in FIG. 10 has a bellows shape and is easily crushed. Further, the cylindrical body 44 shown in FIG. 11 swells outward in the radial direction and is easily crushed. In addition, the cylindrical body 45 shown in FIG. 12 is provided with slits on the side surface along the longitudinal direction at equal intervals in the circumferential direction. 10 to 12, the right side is a side view of the cylindrical bodies 43, 44, 45, and the left side is the cylindrical bodies 43, 44, 4.
5 is a front view of FIG. 9 to 12 is an embodiment of the invention according to claims 9 to 11.
【0045】また、上記構成部材の数、位置、形状等は
上記実施の形態に限定されず、本発明を実施する上で好
適な数、位置、形状等にすることができる。なお、各図
において、同一構成要素には同一符号を付している。The number, position, shape, and the like of the above-mentioned constituent members are not limited to the above-described embodiment, but can be set to a number, position, shape, and the like suitable for carrying out the present invention. In the drawings, the same components are denoted by the same reference numerals.
【0046】[0046]
【発明の効果】本発明は以上のように構成されているの
で、以下に掲げる効果を奏する。設計最大移動量のう
ち、温度変化、活荷重、及び小中規模の地震による移動
量のみをバネで対応し、設計最大移動量にまで至るよう
な大地震による移動量はノックオフボルトの破断又はサ
ポート管の破壊による緊張材端部の移動の確保により対
応させる。その結果、バネの長さを長くすることなく、
連続桁にも適用することができる。それ故、本発明によ
ればバネの係数を小さくしなくとも済むので緊張材の撓
みを解消することができる。また、セーフティーストッ
パーを薄くでき、且つ重量を小さくすることができる。Since the present invention is configured as described above, the following effects can be obtained. Of the maximum design travel, only spring movement responds to temperature changes, live loads, and travel due to small and medium-scale earthquakes, and knock-off bolts are broken or supported for travel due to large earthquakes up to the design maximum travel. This will be dealt with by ensuring the movement of the tendon end due to the tube breaking. As a result, without increasing the length of the spring,
It can be applied to continuous digits. Therefore, according to the present invention, it is not necessary to reduce the coefficient of the spring, and the bending of the tendon can be eliminated. Also, the safety stopper can be made thinner and the weight can be made smaller.
【図1】本発明の実施の形態に係る連結式落橋防止装置
が横桁に取り付けられた状態を示す縦断面図である。FIG. 1 is a vertical cross-sectional view showing a state in which a connecting type bridge prevention device according to an embodiment of the present invention is attached to a cross beam.
【図2】図1に示す連結式落橋防止装置の動作を示す縦
断面図である。FIG. 2 is a longitudinal sectional view showing the operation of the articulated type fall prevention device shown in FIG.
【図3】図1に示す連結式落橋防止装置の動作を示す縦
断面図である。FIG. 3 is a longitudinal sectional view showing the operation of the articulated type fall prevention device shown in FIG. 1;
【図4】図1に示す連結式落橋防止装置の動作を示す縦
断面図である。FIG. 4 is a longitudinal sectional view showing an operation of the articulated bridge prevention device shown in FIG. 1;
【図5】本発明の他の実施の形態に係る連結式落橋防止
装置の縦断図である。FIG. 5 is a longitudinal sectional view of a connection type fall prevention device according to another embodiment of the present invention.
【図6】図5に示す連結式落橋防止装置の動作を示す図
である。FIG. 6 is a view showing the operation of the articulated dropping prevention device shown in FIG. 5;
【図7】図5に示す連結式落橋防止装置の動作を示す図
である。FIG. 7 is a view showing the operation of the articulated type fall prevention device shown in FIG. 5;
【図8】本発明のその他の実施の形態に係る連結式落橋
防止装置の縦断面図である。FIG. 8 is a longitudinal sectional view of a connection type fall prevention device according to another embodiment of the present invention.
【図9】本発明のその他の実施の形態に係る連結式落橋
防止装置の縦断面図である。FIG. 9 is a longitudinal sectional view of a connection type fall prevention device according to another embodiment of the present invention.
【図10】本発明の連結式落橋防止装置の筒体の変形例
を示す図である。FIG. 10 is a view showing a modified example of the cylindrical body of the connection-type bridge prevention device of the present invention.
【図11】本発明の連結式落橋防止装置の筒体の変形例
を示す図である。FIG. 11 is a view showing a modified example of the cylindrical body of the connection type fall prevention device of the present invention.
【図12】本発明の連結式落橋防止装置の筒体の変形例
を示す図である。FIG. 12 is a view showing a modified example of the cylinder of the articulated type fall prevention device of the present invention.
C 横桁 L PC鋼より線(連結材) Ls スリーブ P 連結式落橋防止装置(従来技術) 10 連結式落橋防止装置 11 サポート管(筒体) 11a フランジ 12 コイルスプリング(付勢手段) 13 支圧板 14a,14b Wナット及び座金(固定具) 15 ノックオフボルト(接続・破断部材) 16 防錆キャップ 17 セーフティストッパー(緩衝材) 20 連結式落橋防止装置 21 係止フランジ 22 付勢手段 30 連結式落橋防止装置 40 連結式落橋防止装置 41 拘束ボルト 42 座金 43,44,45 筒体 45a スリット C Cross girder L PC steel strand (connection material) Ls sleeve P Connection type bridge prevention device (conventional technology) 10 Connection type bridge prevention device 11 Support pipe (tubular body) 11a Flange 12 Coil spring (biasing means) 13 Pressure plate 14a, 14b W nut and washer (fixing tool) 15 Knock-off bolt (connecting / breaking member) 16 Rust prevention cap 17 Safety stopper (buffer material) 20 Linkage type bridge prevention device 21 Locking flange 22 Biasing means 30 Linkage type bridge prevention Apparatus 40 Connecting type fall prevention device 41 Restraint bolt 42 Washer 43,44,45 Cylindrical body 45a Slit
Claims (11)
に懸け渡される連結材の端部を前記橋桁又は橋台に固定
して落橋を防止する連結式落橋防止装置であって、 前記連結材の端部側に位置して前記連結材に挿通される
筒体と、 該筒体を、前記連結材の端部方向に付勢する付勢手段
と、 前記連結材の端部に固定される固定具と、 該連結材と前記筒体との相対移動を拘束し、所定応力が
生じたときに破断する接続・破断部材とを有することを
特徴とする連結式落橋防止装置。1. A connection type bridge prevention device for fixing an end of a connecting member suspended between a bridge girder and a bridge girder or abutment adjacent thereto to the bridge girder or abutment to prevent the bridge from falling. A tubular body positioned at an end portion and inserted through the connecting member; an urging means for urging the tubular body toward an end of the connecting member; and a fixed member fixed to an end portion of the connecting member. And a connection / rupture member that restrains relative movement between the connecting member and the cylindrical body and breaks when a predetermined stress is generated.
とを特徴とする請求項1記載の連結式落橋防止装置。2. The bridge-type bridge prevention device according to claim 1, wherein the cylinder is urged via a support plate.
ランジと前記橋脚又は前記橋台との間に前記付勢手段が
介装されたことを特徴する請求項1に記載の連結式落橋
防止装置。3. The connection type bridge prevention device according to claim 1, wherein a flange is provided on the cylindrical body, and the urging means is interposed between the flange and the pier or the abutment. apparatus.
の間に支圧板が設けられたことを特徴する請求項1又は
3に記載の連結式落橋防止装置。4. The connection type fall prevention device according to claim 1, wherein a support plate is provided between the urging means and the bridge girder or the abutment.
に懸け渡される連結材の端部を前記橋桁又は橋台に固定
して落橋を防止する連結式落橋防止装置であって、 前記連結材の端部側に位置して前記連結材に挿通される
筒体と、 前記連結材の端部に固定される固定具と、 該連結材と前記筒体との相対移動を拘束し、所定応力が
生じたときに破断する接続・破断部材とを有することを
特徴とする連結式落橋防止装置。5. A connection type fall prevention device for fixing an end of a connecting member suspended between a bridge girder and a bridge girder or abutment adjacent thereto to the bridge girder or abutment to prevent a bridge from falling off, comprising: A tubular member positioned at an end portion and inserted through the connecting member; a fixing member fixed to an end portion of the connecting member; and restraining relative movement between the connecting member and the cylindrical member, and a predetermined stress is reduced. A connection-type bridge prevention device having a connection / break member that breaks when it occurs.
金の側面に螺着されるものであることを特徴とする請求
項1乃至5のいずれかに記載の連結式落橋防止装置。6. The fixing device according to claim 1, wherein the fixing member is a nut and a washer, and the connecting / breaking member is inserted through the cylindrical body and is screwed to a side surface of the washer. 6. The connection type fall prevention device according to any one of 1 to 5.
し、且つ前記座金を掛止するものであることを特徴とす
る請求項1乃至6のいずれかに記載の連結式落橋防止装
置。7. The connection-type bridge prevention device according to claim 1, wherein the connection / rupture member penetrates the cylindrical body and locks the washer. .
材が介装されていることを特徴とする請求項1乃至7の
いずれかに記載の連結式落橋防止装置。8. The connection type bridge prevention device according to claim 1, wherein a cushioning material is interposed on the bridge girder or the abutment side of the support plate.
に懸け渡される連結材の端部を前記橋桁又は前記橋台に
固定して落橋を防止する連結式落橋防止装置であって、 前記連結材の端部側に位置して前記連結材に挿通される
筒体と、 前記連結材の端部に固定される固定具と、 該連結材と前記筒体との相対移動を拘束する拘束部材と
を有することを特徴とする連結式落橋防止装置。9. A connection type bridge prevention device for fixing an end of a connecting member suspended between a bridge girder and a bridge girder or abutment adjacent to the bridge girder to the bridge girder or the abutment, thereby preventing a bridge from being dropped. A tubular body that is inserted at the end side of the connecting member and is fixed to an end of the connecting member; and a restraint member that restrains relative movement between the connecting member and the tubular body. An articulated bridge-prevention device characterized by having:
けられていることを特徴とした請求項1乃至9のいずれ
かに記載の連結式落橋防止装置。10. The connection-type fall prevention device according to claim 1, wherein a cap is attached to an end of the cylindrical body.
ていることを特徴とする請求項1乃至10のいずれかに
記載の連結式落橋防止装置。11. The connection-type fall prevention device according to claim 1, wherein the support plate is covered with a casing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13738598A JP3300284B2 (en) | 1998-05-06 | 1998-05-06 | Articulated bridge fall prevention device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13738598A JP3300284B2 (en) | 1998-05-06 | 1998-05-06 | Articulated bridge fall prevention device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11315510A true JPH11315510A (en) | 1999-11-16 |
JP3300284B2 JP3300284B2 (en) | 2002-07-08 |
Family
ID=15197461
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13738598A Expired - Fee Related JP3300284B2 (en) | 1998-05-06 | 1998-05-06 | Articulated bridge fall prevention device |
Country Status (1)
Country | Link |
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JP (1) | JP3300284B2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001064914A (en) * | 1999-08-26 | 2001-03-13 | Hanshin Expressway Public Corp | Displacement restriction device-cum-bridge fall prevention device |
JP2002187901A (en) * | 2000-12-21 | 2002-07-05 | Denki Kagaku Kogyo Kk | Process for preparation of carboxyl group-containing rubber |
JP2004036337A (en) * | 2002-07-08 | 2004-02-05 | Tokyo Seiko Seni Rope Kk | Bridge falling preventive device |
JP2004107909A (en) * | 2002-09-13 | 2004-04-08 | Tokyo Fabric Kogyo Kk | Connection type bridge-fall preventive device |
JP2004244815A (en) * | 2003-02-10 | 2004-09-02 | Shinko Wire Co Ltd | Bridge falling preventive device with displacement restricting function |
JP2006219888A (en) * | 2005-02-10 | 2006-08-24 | Kawaguchi Metal Industries Co Ltd | Bridge fall preventing device |
JP2014031670A (en) * | 2012-08-06 | 2014-02-20 | Ihi Infrastructure Systems Co Ltd | Damper fitting device |
JP2018204186A (en) * | 2017-05-30 | 2018-12-27 | オイレス工業株式会社 | Damper connection mechanism |
CN113215970A (en) * | 2021-04-08 | 2021-08-06 | 中铁第四勘察设计院集团有限公司 | Limiting support and beam bridge |
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CN111945548A (en) * | 2020-08-19 | 2020-11-17 | 温州砼程维禹科技有限公司 | Single-column pier bridge anti-overturning beam falling device |
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1998
- 1998-05-06 JP JP13738598A patent/JP3300284B2/en not_active Expired - Fee Related
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001064914A (en) * | 1999-08-26 | 2001-03-13 | Hanshin Expressway Public Corp | Displacement restriction device-cum-bridge fall prevention device |
JP2002187901A (en) * | 2000-12-21 | 2002-07-05 | Denki Kagaku Kogyo Kk | Process for preparation of carboxyl group-containing rubber |
JP2004036337A (en) * | 2002-07-08 | 2004-02-05 | Tokyo Seiko Seni Rope Kk | Bridge falling preventive device |
JP2004107909A (en) * | 2002-09-13 | 2004-04-08 | Tokyo Fabric Kogyo Kk | Connection type bridge-fall preventive device |
JP2004244815A (en) * | 2003-02-10 | 2004-09-02 | Shinko Wire Co Ltd | Bridge falling preventive device with displacement restricting function |
JP2006219888A (en) * | 2005-02-10 | 2006-08-24 | Kawaguchi Metal Industries Co Ltd | Bridge fall preventing device |
JP2014031670A (en) * | 2012-08-06 | 2014-02-20 | Ihi Infrastructure Systems Co Ltd | Damper fitting device |
JP2018204186A (en) * | 2017-05-30 | 2018-12-27 | オイレス工業株式会社 | Damper connection mechanism |
CN113215970A (en) * | 2021-04-08 | 2021-08-06 | 中铁第四勘察设计院集团有限公司 | Limiting support and beam bridge |
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