JP4744307B2 - Mechanical property imparting structure - Google Patents

Mechanical property imparting structure Download PDF

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JP4744307B2
JP4744307B2 JP2006010751A JP2006010751A JP4744307B2 JP 4744307 B2 JP4744307 B2 JP 4744307B2 JP 2006010751 A JP2006010751 A JP 2006010751A JP 2006010751 A JP2006010751 A JP 2006010751A JP 4744307 B2 JP4744307 B2 JP 4744307B2
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energy absorbing
absorbing member
mechanical properties
bridge
connecting cable
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JP2007191906A (en
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重信 濱中
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濱中ナット株式会社
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Description

本発明は機械的特性の付与構造に関し、例えばシンプルな構造で引張り強度、低温時における延性あるいは耐衝撃性などを必要とする箇所に所望の引張り強度、低温時における延性あるいは耐衝撃性を付与することができるようにした付与構造に関する。   TECHNICAL FIELD The present invention relates to a structure for imparting mechanical properties. For example, a desired structure having a simple structure with tensile strength, ductility at low temperature, impact resistance, etc. is provided with desired tensile strength, ductility at low temperature, or impact resistance. It is related with the grant structure which made it possible.

例えば、大地震が発生すると、橋脚や橋台の下部構造体に大きな揺れが作用すると、下部構造体が損壊するばかりでなく、橋桁が下部構造体から落下する、いわゆる落橋事故が発生するおそれがある。   For example, when a large earthquake occurs, if a large shaking acts on the pier and the abutment lower structure, not only the lower structure may be damaged, but also a so-called falling bridge accident may occur in which the bridge girder falls from the lower structure. .

従来、隣接する橋桁の間や橋桁と下部構造体の間を連結ケーブルやリンクで連結することが行われていたが、大地震には衝撃的な荷重が作用することから、連結ケーブルやリンクでは十分に対応しきれない。   Conventionally, connecting cables and links between adjacent bridge girders and between bridge girders and lower structures have been performed, but shock loads are applied to large earthquakes. I can't handle it enough.

これに対し、ゴムやばね部材の弾性変形を利用して連結ケーブルに加わる衝撃的なエネルギーを吸収するようにした落橋防止装置が提案されている（特許文献１、特許文献２、特許文献３、特許文献４、特許文献５、特許文献６）。   On the other hand, a fallen bridge prevention device that absorbs shocking energy applied to the connecting cable by using elastic deformation of rubber or a spring member has been proposed (Patent Document 1, Patent Document 2, Patent Document 3, Patent Document 4, Patent Document 5, Patent Document 6).

特開２００４−３５３３０４号公報JP 2004-353304 A 特開２００４−２４４８１５号公報JP 2004-244815 A 特開２００１−２４８１１１号公報JP 2001-248111 A 特開２００１−５５７０９号公報JP 2001-55709 A 特開２００１−３３７１号公報JP 2001-3371 A 特開２０００−２２０１１１号公報JP 2000-220111 A

しかし、上記特許文献１〜６記載の落橋防止装置はゴムやばね部材を取付ける構造を必要とし、構造が複雑になってコスト高を招来する。   However, the falling bridge prevention devices described in Patent Documents 1 to 6 require a structure for attaching rubber or a spring member, which complicates the structure and causes high costs.

本発明はかかる問題点に鑑み、シンプルな構造で落橋事故を確実に防止できるようにした落橋防止装置を提供することを課題とする。   In view of such problems, an object of the present invention is to provide a falling bridge prevention device that can reliably prevent a falling bridge accident with a simple structure.

本件発明者らは上述の課題を解決すべく鋭意研究を重ねたところ、連結ケーブルの途中をエネルギー吸収部材に巻回し、必要に応じて結ばれるようにし、大地震の発生時において衝撃的な荷重が連結ケーブルが加わったときに連結ケーブルの巻回部分を引っ張ってエネルギー吸収部材を弾性変形又は塑性変形させるようにすると、衝撃的な荷重を緩和できることに着目するに至った。   The inventors of the present invention have made extensive studies to solve the above-mentioned problems.The middle of the connecting cable is wound around an energy absorbing member so that it can be tied as necessary. However, when the connecting cable is added, if the energy absorbing member is elastically deformed or plastically deformed by pulling the winding portion of the connecting cable, it has been noticed that the impact load can be reduced.

また、寒冷地においては伸びやシャルピー値が低下することが知られているが、かかる場合にも上述の構造を適用すると、低温時における伸びやシャルピー値などの機械的特性を所望の値にアップさせることができる。   Although it is known that elongation and Charpy value decrease in cold regions, applying the above-mentioned structure in such a case also increases mechanical properties such as elongation and Charpy value at low temperatures to desired values. Can be made.

本発明に係る機械的特性の付与構造は、引張り強度、低温における延性又は耐衝撃性などの機械的特性を必要とする箇所に、所望の機械的特性を付与することのできるようにした構造であって、上記機械的特性を必要とする２つの箇所には取付けブラケットが各々取付けられ、該両取付けブラケットの挿通穴には連結ケーブルの端部が挿通されて固定具によって抜止め又は固定され、上記連結ケーブルは途中でエネルギー吸収部材に径を収縮する方向に引っ張った時に結ばれるように巻回されており、上記機械的特性を必要とする箇所に荷重又は衝撃が加わった時に上記連結ケーブルの巻回部分が径を収縮する方向に引っ張られてエネルギー吸収部材を弾性変形又は塑性変形させることにより、上記所望の機械的特性を得るようにしたことを特徴とする。 The structure for imparting mechanical properties according to the present invention is a structure that can impart desired mechanical properties to locations that require mechanical properties such as tensile strength, ductility at low temperatures, or impact resistance. The mounting brackets are respectively attached to the two places that require the mechanical characteristics, and the end portions of the connecting cables are inserted into the insertion holes of the both mounting brackets, and are secured or fixed by the fixtures. The connecting cable is wound so as to be tied when the energy absorbing member is pulled in the direction of contracting the diameter in the middle, and when a load or impact is applied to a place requiring the mechanical characteristics, The above-mentioned desired mechanical properties are obtained by elastically or plastically deforming the energy absorbing member by pulling the wound portion in the direction of shrinking the diameter. And butterflies.

本発明の特徴の１つは機械的特性を必要とする２つの箇所に取付けた連結ケーブルの途中をエネルギー吸収部材に巻回させるようにした点にある。   One of the features of the present invention is that the energy absorbing member is wound in the middle of a connecting cable attached to two locations requiring mechanical characteristics.

連結ケーブルに荷重又は衝撃が加わると、連結ケーブルの巻回部分が径を収縮する方向に引っ張られてエネルギー吸収部材を弾性変形又は塑性変形させ、この弾性変形又は塑性変形によって連結ケーブルに加わったエネルギーが緩和され吸収されるので、所望の引張り強度、低温度における延性や耐衝撃性などの機械的特性を得ることができる。   When a load or impact is applied to the connecting cable, the winding portion of the connecting cable is pulled in a direction in which the diameter contracts to elastically deform or plastically deform the energy absorbing member, and the energy applied to the connecting cable by this elastic deformation or plastic deformation. Is relaxed and absorbed, so that it is possible to obtain desired tensile strength, mechanical properties such as ductility and impact resistance at low temperatures.

また、連結ケーブルをエネルギー吸収部材に巻回するだけであるので、非常にシンプルな構造で所望の機械的特性を得ることができる。   Further, since the connecting cable is simply wound around the energy absorbing member, desired mechanical characteristics can be obtained with a very simple structure.

エネルギー吸収部材は連結ケーブルを巻回させることのみによってその巻回された状態に保持されるようにしてもよいが、連結ケーブルが引っ張られると、連結ケーブルやエネルギー吸収部材に対する荷重の加わり方によって連結ケーブルがエネルギー吸収部材から外れるおそれがある。そこで、連結ケーブルの途中をエネルギー吸収部材に巻回させ結んでから両側方に引っ張るようにすると、エネルギー吸収部材に対する連結ケーブルの位置が安定するので、エネルギー吸収部材が外れるおそれを解消できる。   The energy absorbing member may be held in its wound state only by winding the connecting cable. However, when the connecting cable is pulled, the energy absorbing member is connected depending on how the load is applied to the connecting cable and the energy absorbing member. There is a possibility that the cable may come off from the energy absorbing member. Then, if the middle of the connecting cable is wound around the energy absorbing member and then pulled to both sides, the position of the connecting cable with respect to the energy absorbing member is stabilized, so that the possibility of the energy absorbing member coming off can be eliminated.

また、エネルギー吸収部材を取付けブラケットに支持するようにすると、エネルギー吸収部材の姿勢が安定するので、上記と同様に、連結ケーブルが引っ張られたときに、エネルギー吸収部材が外れるおそれを解消することができる。   In addition, if the energy absorbing member is supported by the mounting bracket, the posture of the energy absorbing member is stabilized, so that the possibility that the energy absorbing member is detached when the connecting cable is pulled can be eliminated as described above. it can.

上記では連結ケーブルの途中をエネルギー吸収部材に巻回するようにしたが、連結ケーブルに環状部分を形成し、この環状部分をエネルギー吸収部材に外嵌させるようにしても同様の作用効果が得られる。   In the above, the middle of the connecting cable is wound around the energy absorbing member, but the same effect can be obtained by forming an annular portion on the connecting cable and fitting the annular portion to the energy absorbing member. .

即ち、本発明に係る機械的特性の付与構造の参考例は、引張り強度、低温における延性又は耐衝撃性などの機械的特性を必要とする箇所に、所望の機械的特性を付与することのできるようにした構造であって、上記機械的特性を必要とする２つの箇所には取付けブラケットが各々取付けられ、該両取付けブラケットの挿通穴の各々には連結ケーブルの端部が挿通されて固定具によって抜止め又は固定され、上記連結ケーブルの他端部分には環状部分が形成されてエネルギー吸収部材に外嵌されており、上記機械的特性を必要とする箇所に荷重又は衝撃が加わった時に上記連結ケーブルの環状部分が相互に離れる方向に引っ張られてエネルギー吸収部材を弾性変形又は塑性変形させることにより、上記所望の機械的特性を得るようにしたことを特徴とする。 That is, the reference example of the structure for imparting mechanical properties according to the present invention can impart desired mechanical properties to locations that require mechanical properties such as tensile strength, ductility at low temperature, or impact resistance. A mounting bracket is attached to each of the two locations that require the above-mentioned mechanical characteristics, and the end of the connecting cable is inserted into each of the insertion holes of the both mounting brackets. The other end portion of the connecting cable is formed with an annular portion and is externally fitted to the energy absorbing member, and when a load or impact is applied to a location requiring the mechanical characteristics, The above-mentioned desired mechanical characteristics are obtained by pulling the annular portions of the connecting cable in directions away from each other to elastically or plastically deform the energy absorbing member. And butterflies.

連結ケーブルの環状部分は連結ケーブルを切断してその端部を環状に曲げ、固定具で固定することにより形成することができる。   The annular portion of the connection cable can be formed by cutting the connection cable, bending its end into an annular shape, and fixing with a fixture.

エネルギー吸収部材は機械的特性を必要とする２つの箇所に対して１つだけ設けるようにしてもよく、又両箇所の各々に設けるようにしてもよい。   Only one energy absorbing member may be provided for two locations requiring mechanical characteristics, or may be provided at each of the two locations.

即ち、機械的特性を必要とする２つの箇所の各々にエネルギー吸収部材を設け、２つのエネルギー吸収部材の各々に連結ケーブルを巻回しあるいは連結ケーブルの環状部分を外嵌するようにしてもよい。   That is, an energy absorbing member may be provided at each of two locations requiring mechanical characteristics, and a connecting cable may be wound around each of the two energy absorbing members or an annular portion of the connecting cable may be externally fitted.

エネルギー吸収部材は連結ケーブルの巻回部分によって締付けられて弾性変形し又は塑性変形し得るものであれば特に材料は限定されず、例えばアルミウム系材料などの軽金属材料、あるいはゴムなどの弾性部材、軟質のプラスチック材料などで製作されることができる。   The energy absorbing member is not particularly limited as long as it can be elastically deformed or plastically deformed by being tightened by the winding portion of the connecting cable. For example, a light metal material such as aluminum-based material, an elastic member such as rubber, or a soft material It can be made of plastic material.

また、エネルギー吸収部材の形状は連結ケーブルの巻回部分によって締付けられて弾性変形しあるいは塑性変形し得るものであれば特に限定されないが、連結ケーブルを円滑にかつ安定に巻回できる形状、例えば円筒状や円柱状を採用するのがよい。   The shape of the energy absorbing member is not particularly limited as long as the energy absorbing member can be elastically deformed or plastically deformed by being tightened by a winding portion of the connecting cable, but a shape that can smoothly and stably wind the connecting cable, for example, a cylinder It is good to adopt a shape or a column shape.

本発明に係る機械的特性の付与特性は機械装置や構造体などにおける所望の引張り強度、低温度における延性（伸び）や耐衝撃性（シャルピー値）を必要とする箇所に適用することができる。例えば、落橋防止装置に適用する場合、橋桁が下部構造体から落下するのを防止する落橋防止装置に適用した機械的特性の付与構造であって、下部構造体上に２つの橋桁を載置し、２つの橋桁には取付けブラケットを取付け、両取付けブラケットには連結ケーブルの端部を抜止め又は固定する一方、連結ケーブルを途中で弾性変形又は塑性変形し得るエネルギー吸収部材に巻回して構成することができる。   The mechanical property-imparting property according to the present invention can be applied to a portion requiring desired tensile strength, ductility (elongation) and impact resistance (Charpy value) at a low temperature in a mechanical device or structure. For example, when applied to a falling bridge prevention device, a mechanical property imparting structure applied to the falling bridge prevention device that prevents the bridge girder from falling from the lower structure, and two bridge girders are mounted on the lower structure. Mounting brackets are attached to the two bridge girders, and the ends of the connecting cables are secured or fixed to both mounting brackets, while the connecting cables are wound around an energy absorbing member that can be elastically deformed or plastically deformed. be able to.

また、橋桁が下部構造体から落下するのを防止する落橋防止装置に適用した機械的特性の付与構造であって、下部構造体上に２つの橋桁を載置し、２つの橋桁には取付けブラケットを取付け、両取付けブラケットには連結ケーブルの端部を抜止め又は固定する一方、連結ケーブルの環状部分を弾性変形又は塑性変形し得るエネルギー吸収部材に外嵌して構成することができる。   Also, a mechanical property imparting structure applied to a falling bridge prevention device that prevents the bridge girder from falling from the lower structure, wherein two bridge girders are mounted on the lower structure and mounting brackets are mounted on the two bridge girders. The end portions of the connecting cables are secured or fixed to both mounting brackets, while the annular portion of the connecting cable is externally fitted to an energy absorbing member that can be elastically deformed or plastically deformed.

さらに、橋桁が下部構造体から落下するのを防止する落橋防止装置に適用した機械的特性の付与構造であって、橋桁及び下部構造体には取付けブラケットを各々取付け、両取付けブラケットには連結ケーブルの端部を抜止め又は固定する一方、連結ケーブルを途中で弾性変形又は塑性変形し得るエネルギー吸収部材に巻回して構成することもできる。   Furthermore, it is a structure for imparting mechanical properties applied to the bridge girder prevention device that prevents the bridge girder from dropping from the lower structure, and mounting brackets are respectively attached to the bridge girder and the lower structure, and the connecting cables are attached to both mounting brackets. The connecting cable can be wound around an energy absorbing member that can be elastically deformed or plastically deformed in the middle while the end of the cable is prevented or fixed.

さらにまた、橋桁が下部構造体から落下するのを防止する落橋防止装置に適用した機械的特性の付与構造であって、橋桁及び下部構造体には取付けブラケットを各々取付け、両取付けブラケットには連結ケーブルの端部を抜止め又は固定する一方、連結ケーブルの環状部分を弾性変形又は塑性変形し得るエネルギー吸収部材に外嵌して構成することができる。   Furthermore, it is a structure for imparting mechanical characteristics applied to the bridge girder prevention device that prevents the bridge girder from dropping from the lower structure, and mounting brackets are respectively attached to the bridge girder and the lower structure, and are connected to both mounting brackets. While securing or fixing the end of the cable, the annular portion of the connecting cable can be externally fitted to an energy absorbing member that can be elastically deformed or plastically deformed.

以下、本発明を図面に示す具体例に基づいて詳細に説明する。図１及び図２は本発明に係る機械的特性の付与構造の好ましい実施形態を示し、これは落橋防止装置に適用した例である。図において、橋脚（下部構造体）１０上には一対の橋桁１１が相互に対向して載置され、隣接する橋桁１１の間は連結ケーブル２０によって相互に連結されている。   Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 and 2 show a preferred embodiment of a structure for imparting mechanical properties according to the present invention, which is an example applied to a falling bridge prevention device. In the drawing, a pair of bridge girders 11 are placed on a bridge pier (lower structure) 10 so as to face each other, and adjacent bridge girders 11 are connected to each other by a connecting cable 20.

即ち、橋桁１１の端部側壁面には取付けブラケット２１が締結ボルト（図示せず）等によって固定されている。この取付けブラケット２１はコ字状の本体部分２１Ａに台部２１Ｂを一体に形成した形状をなし、本体部分２１Ａの縦辺部分には挿通穴２１Ｃが形成され、挿通穴２１Ｃには連結ケーブル２０の端部が挿通されている。   That is, the mounting bracket 21 is fixed to the end side wall surface of the bridge girder 11 by fastening bolts (not shown) or the like. The mounting bracket 21 has a U-shaped main body portion 21A and a base portion 21B integrally formed. An insertion hole 21C is formed in the vertical side portion of the main body portion 21A, and the connection cable 20 is inserted into the insertion hole 21C. The end is inserted.

また、取付けブラケット２１の本体部分２１Ａの内側にはゴムブッシュ２２が設けられ、ゴムブッシュ２２及びその座金２２Ａには挿通穴が形成され、両挿通穴には連結ケーブル２０が挿通されている。   Further, a rubber bush 22 is provided inside the main body portion 21A of the mounting bracket 21. Insertion holes are formed in the rubber bush 22 and its washer 22A, and the connecting cable 20 is inserted into both the insertion holes.

連結ケーブル２０の端部には取付け金具２４が外嵌され、カシメや溶接などによって固定され、取付け金具２４の端部には雄ねじ２４Ａが形成され、雄ねじ２４Ａにはナット２３が螺合されて締付けられ、これによって連結ケーブル２０の端部は取付けブラケット２１に対して抜止めされている。   A fitting 24 is externally fitted to the end of the connection cable 20 and fixed by caulking or welding, and a male screw 24A is formed on the end of the fitting 24, and a nut 23 is screwed into the male screw 24A and tightened. As a result, the end of the connecting cable 20 is secured against the mounting bracket 21.

また、連結ケーブル２０の両端部には橋落防止装置３０が設けられている。この橋落防止装置３０において、取付けブラケット２１の台部２１Ｂにはエネルギー吸収部材３１が載置されて取付け具３１Ａによって固定されている。このエネルギー吸収部材３１は例えばアルミニウム系金属材料を用いて円柱状に製作され、エネルギー吸収部材３１の外側面には連結ケーブル２０の途中が巻回されている。なお、図には現れていないが、連結ケーブル２０は径を収縮する方向に引っ張った時に結ばれるようにエネルギー吸収部材３１に巻回される。 In addition, bridge prevention devices 30 are provided at both ends of the connecting cable 20. In this bridge prevention device 30, an energy absorbing member 31 is placed on the base portion 21 </ b> B of the mounting bracket 21 and is fixed by a fixture 31 </ b> A. The energy absorbing member 31 is manufactured in a columnar shape using, for example, an aluminum-based metal material, and the connecting cable 20 is wound around the outer surface of the energy absorbing member 31. Although not shown in the figure, the connecting cable 20 is wound around the energy absorbing member 31 so as to be tied when pulled in the direction of contracting the diameter.

連結ケーブル２０の長さは連結ケーブル２０がエネルギー吸収部材３１を破断しても橋桁１１が橋脚１０上に残っているように、橋脚１０の幅と等しいか少し短い長さとするのが好ましい。 The length of the connecting cable 20 is preferably equal to or slightly shorter than the width of the pier 10 so that the bridge girder 11 remains on the pier 10 even if the connecting cable 20 breaks the energy absorbing member 31 .

大きな地震などに起因していずれか一方の橋桁１１にこれが橋脚１０から落下する方向に揺れが加わると、連結ケーブル２０には衝撃的な引っ張り力が作用する。すると、まずゴムブッシュ２２が弾性変形し、次に連結ケーブル２０の巻回部分が引っ張られて伸びようとし、巻回部分の径が収縮してエネルギー吸収部材３０を締付け、エネルギー吸収部材３１が塑性変形し、これによって衝撃的なエネルギーは緩和され、橋桁１１の落下は防止される。 If any bridge girder 11 is shaken in the direction in which it falls from the pier 10 due to a large earthquake or the like, a shocking tensile force acts on the connecting cable 20. Then, the rubber bush 22 is elastically deformed first, then pulled the wound portions of the connecting cable 20 tries Nobiyo, and the diameter of the wound portion shrinks to tighten the energy absorbing member 30, the energy absorbing member 31 is plastically It is deformed, so that the shocking energy is alleviated and the bridge girder 11 is prevented from falling.

図３は第２の実施形態を示し、図において図１及び図２と同一符号は同一又は相当部分を示す。本例では橋桁１１に取付けた連結ケーブル２０の他端部を橋台（下部構造体）１２に橋桁１１と同様の構造によって取付けるとともに、本例の橋落防止装置３０を設けている。このように、連結ケーブル２０の他端は橋桁１１ではなく、橋台などの下部構造体に連結することもできる。   FIG. 3 shows a second embodiment, in which the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding parts. In this example, the other end of the connecting cable 20 attached to the bridge girder 11 is attached to the abutment (lower structure) 12 by the same structure as the bridge girder 11 and the bridge prevention device 30 of this example is provided. Thus, the other end of the connecting cable 20 can be connected to the lower structure such as an abutment instead of the bridge girder 11.

図４及び図５は本発明の参考例を示し、図において図１及び図２と同一符号は同一又は相当部分を示す。本例では連結ケーブル２０を切断してその端部を環状に折り曲げ、固定具２０Ａによって折り曲げた状態に固定し、この環状部分２０Ｃをエネルギー吸収部材３１に外嵌している。図では一方のエネルギー吸収部材３１を示しているが、他方のエネルギー吸収部材３１についても同様の構成が採用されている。このように、連結ケーブル２０をエネルギー吸収部材３１に巻回するのではなく、環状部分２０Ｃを構成してエネルギー吸収部材３１に外嵌するように構成することもできる。この場合、一方の環状部分２０Ａを形成する際に他方の環状部分２０Ａの中を挿通して環状に折り曲げて固定すると、２つの環状部分２０Ａを両者が相互に結ばれるように連結することができる。 4 and 5 show a reference example of the present invention, in which the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts. In this example, the connecting cable 20 is cut and its end is bent in an annular shape and fixed in a state where it is bent by a fixture 20 </ b> A. Although one energy absorbing member 31 is shown in the figure, the same configuration is adopted for the other energy absorbing member 31. Thus, instead of winding the connecting cable 20 around the energy absorbing member 31, it is possible to configure the annular portion 20 </ b> C so as to be fitted around the energy absorbing member 31. In this case, when forming the one annular portion 20A, if the second annular portion 20A is inserted into the other annular portion 20A and bent into an annular shape and fixed, the two annular portions 20A can be connected to each other. .

なお、上記の実施形態では落橋防止装置を例に説明したが、本発明はこれに限定されず、引張り強度、低温度における延性や耐衝撃性を必要とする箇所に、そのような引張り強度、低温度における延性や耐衝撃性を付与する場合に同様に適用できる。この場合、橋桁又は下部構造体を機械的強度を必要とする２つの箇所に置き換えて上記の実施形態と同様の構造を採用すればよい。   In the above embodiment, the falling bridge prevention device has been described as an example, but the present invention is not limited to this, and the tensile strength, in places where ductility and impact resistance at low temperatures are required, such tensile strength, It can be similarly applied when imparting ductility and impact resistance at low temperatures. In this case, the bridge girder or the lower structure may be replaced with two places requiring mechanical strength to adopt the same structure as that of the above embodiment.

本発明に係る機械的特性の付与構造の好ましい実施形態を適用した落橋防止装置を示す概略構成図である。It is a schematic block diagram which shows the falling-bridge prevention apparatus to which preferable embodiment of the provision structure of the mechanical property which concerns on this invention is applied. 上記実施形態を示す拡大断面図である。It is an expanded sectional view showing the above-mentioned embodiment. 第２の実施形態を示す概略構成図である。It is a schematic block diagram which shows 2nd Embodiment. 本発明の参考例を示す拡大断面図である。 It is an expanded sectional view showing a reference example of the present invention . 上記参考例を示す平面構成図である。It is a plane block diagram which shows the said reference example .

１０ 橋脚（下部構造体、機械的特性を必要とする２つのうちの一方の箇所）
１１ 橋桁（機械的特性を必要とする２つのうちの一方の箇所）
１２ 橋台（下部構造体、機械的特性を必要とする２つのうちの一方の箇所）
２０ 連結ケーブル
２０Ａ 環状部分
２１ 取付けブラケット
３１ エネルギー吸収部材 10 Pier (substructure, one of the two places requiring mechanical properties)
11 Bridge girder (one of two places requiring mechanical properties)
12 Abutment (substructure, one of the two locations requiring mechanical properties)
20 Connecting cable 20A Annular part 21 Mounting bracket
31 energy absorbing member

Claims (8)

引張り強度、低温における延性又は耐衝撃性などの機械的特性を必要とする箇所に、所望の機械的特性を付与することのできるようにした構造であって、
上記機械的特性を必要とする２つの箇所には取付けブラケットが各々取付けられ、該両取付けブラケットの挿通穴には連結ケーブルの端部が挿通されて固定具によって抜止め又は固定され、上記連結ケーブルは途中でエネルギー吸収部材に径を収縮する方向に引っ張った時に結ばれるように巻回されており、
上記機械的特性を必要とする箇所に荷重又は衝撃が加わった時に上記連結ケーブルの巻回部分が径を収縮する方向に引っ張られてエネルギー吸収部材を弾性変形又は塑性変形させることにより、上記所望の機械的特性を得るようにしたことを特徴とする機械的特性の付与構造。 It is a structure that can give desired mechanical properties to places that require mechanical properties such as tensile strength, ductility at low temperature or impact resistance,
Mounting brackets are respectively attached to the two places requiring the mechanical characteristics, and the end portions of the connecting cables are inserted into the insertion holes of the both mounting brackets, and are secured or fixed by a fixing tool. Is wound to be tied when pulled in the direction of shrinking the diameter to the energy absorbing member on the way,
When a load or an impact is applied to a location requiring the mechanical characteristics, the winding portion of the connection cable is pulled in a direction in which the diameter contracts to elastically deform or plastically deform the energy absorbing member. A mechanical property imparting structure characterized by obtaining mechanical properties. 上記機械的特性を必要とする２つの箇所の各々に上記エネルギー吸収部材が設けられ、上記２つのエネルギー吸収部材の各々に上記連結ケーブルが巻回されあるいは上記連結ケーブルの環状部分が外嵌されている請求項１記載の機械的特性の付与構造。 The energy absorbing member is provided at each of the two locations requiring the mechanical characteristics, and the connecting cable is wound around each of the two energy absorbing members, or an annular portion of the connecting cable is externally fitted. providing structure mechanical properties of claim 1 Symbol placement are. 上記エネルギー吸収部材が上記取付けブラケットに支持されている請求項１記載の機械的特性の付与構造。 Providing structure mechanical properties of claim 1 Symbol mounting the energy absorbing member is supported by the mounting bracket. 上記エネルギー吸収部材が軽金属材料で製作されている請求項１記載の機械的特性の付与構造。 Providing structure mechanical properties of claim 1 Symbol mounting the energy absorbing member is made from a light metal material. 上記エネルギー吸収部材が弾性部材で製作されている請求項１記載の機械的特性の付与構造。 Providing structure mechanical properties of claim 1 Symbol mounting the energy absorbing member is made of an elastic member. 上記エネルギー吸収部材が円筒状又は円柱状をなしている請求項４又は５記載の機械的特性の付与構造。 Providing structure mechanical properties according to claim 4 or 5 Symbol mounting the energy absorbing member is a cylindrical shape or a columnar shape. 橋桁が下部構造体から落下するのを防止する落橋防止装置に適用した機械的特性の付与構造であって、
下部構造体上に２つの橋桁が載置され、該２つの橋桁には上記取付けブラケットが取付けられ、該両取付けブラケットには連結ケーブルの端部が抜止め又は固定されている一方、上記連結ケーブルは途中で弾性変形又は塑性変形し得るエネルギー吸収部材に巻回されている請求項１記載の機械的特性の付与構造。 A mechanical property imparting structure applied to a falling bridge prevention device that prevents the bridge girder from falling from the lower structure,
Two bridge girders are mounted on the lower structure, and the mounting brackets are attached to the two bridge girders, and the ends of the connecting cables are secured or fixed to the two mounting brackets. 2. The structure for imparting mechanical properties according to claim 1, wherein the structure is wound around an energy absorbing member that can be elastically deformed or plastically deformed. 橋桁が下部構造体から落下するのを防止する落橋防止装置に適用した機械的特性の付与構造であって、
橋桁及び下部構造体には上記取付けブラケットが各々取付けられ、該両取付けブラケットには連結ケーブルの端部が抜止め又は固定されている一方、上記連結ケーブルは途中で弾性変形又は塑性変形し得るエネルギー吸収部材に径を収縮する方向に引っ張った時に結ばれるように巻回されている請求項１記載の機械的特性の付与構造。 A mechanical property imparting structure applied to a falling bridge prevention device that prevents the bridge girder from falling from the lower structure,
The mounting brackets are respectively attached to the bridge girder and the lower structure, and the ends of the connecting cables are secured or fixed to the both mounting brackets, while the connecting cables are capable of elastic deformation or plastic deformation in the middle. The mechanical property imparting structure according to claim 1, wherein the structure is wound so that the absorbent member is tied when pulled in a direction of shrinking the diameter .
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