JP6521291B2 - Holding structure of energy absorbing member - Google Patents

Holding structure of energy absorbing member Download PDF

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JP6521291B2
JP6521291B2 JP2015030776A JP2015030776A JP6521291B2 JP 6521291 B2 JP6521291 B2 JP 6521291B2 JP 2015030776 A JP2015030776 A JP 2015030776A JP 2015030776 A JP2015030776 A JP 2015030776A JP 6521291 B2 JP6521291 B2 JP 6521291B2
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energy absorbing
absorbing member
bonding
joining
energy
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JP2016150726A (en
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航 加藤
航 加藤
池田　聡
聡 池田
勇 長澤
勇 長澤
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Subaru Corp
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Description

本発明は、車両の衝突発生時に圧壊して衝突エネルギを吸収するエネルギ吸収部材を保持するためのエネルギ吸収部材の保持構造に関する。   The present invention relates to an energy absorbing member holding structure for holding an energy absorbing member that crushes and absorbs collision energy when a vehicle collision occurs.

車両には、衝突発生時に圧壊し、衝突エネルギを吸収するエネルギ吸収部材が備えられている。エネルギ吸収部材の代表的な例として、バンパビームとフロントフレームとの間に配置されるクラッシュボックスが挙げられる。従来、エネルギ吸収部材は、鉄等の金属材料により構成されていたが、近年、車体の軽量化のために、炭素繊維等の強化繊維が混合された繊維強化樹脂（ＦＲＰ）によりエネルギ吸収部材を構成することが検討されている。   The vehicle is provided with an energy absorbing member that crushes when a collision occurs and absorbs collision energy. A typical example of the energy absorbing member is a crush box disposed between the bumper beam and the front frame. In the past, the energy absorbing member was made of a metal material such as iron, but in recent years, in order to reduce the weight of the vehicle body, the energy absorbing member is made of fiber reinforced resin (FRP) mixed with reinforcing fibers such as carbon fiber. It is being considered to configure.

繊維強化樹脂製のエネルギ吸収部材を車両前方のエネルギ吸収に使用する場合、エネルギ吸収部材の両端部は、バンパビームやフロントフレーム等の他の部材（以下、エネルギ吸収部材が接合される部材を「接合部材」ともいう。）に対して、接着剤を用いて接合される場合がある。例えば、特許文献１には、ＣＦＲＰ製クラッシュボックスの前端部がブラケットの基部に対して接着剤により固定され、後端部がフロントサイドメンバ（フロントフレーム）の前端部に接着剤により固定されることが記載されている。   When an energy absorbing member made of fiber reinforced resin is used for energy absorption in front of the vehicle, both ends of the energy absorbing member are joined to other members such as a bumper beam and a front frame (hereinafter, members to which the energy absorbing member is joined (Also referred to as “members”) may be bonded using an adhesive. For example, in Patent Document 1, the front end of a CFRP crash box is fixed to the base of the bracket by an adhesive, and the rear end is fixed to the front of the front side member (front frame) by an adhesive. Is described.

特開２００８−０２４０８４号公報JP, 2008-024084, A

ここで、筒状に形成されるエネルギ吸収部材の場合、エネルギ吸収部材は、接合部材のうち、エネルギ吸収部材の内周面又は外周面に対向する面に対して接着剤により接合される。すなわち、エネルギ吸収部材は、接合部材における、エネルギ吸収部材の軸方向に沿って延びる面に対して接合される。エネルギ吸収部材と接合部材との接合面には、車両の牽引時に生じるせん断力に耐え得る接着強度が必要とされる。   Here, in the case of the energy absorbing member formed in a cylindrical shape, the energy absorbing member is bonded to the surface of the bonding member facing the inner peripheral surface or the outer peripheral surface of the energy absorbing member by an adhesive. That is, the energy absorbing member is bonded to a surface of the bonding member that extends along the axial direction of the energy absorbing member. The bonding surface between the energy absorbing member and the bonding member is required to have an adhesive strength that can withstand the shear force generated when the vehicle is towed.

しかしながら、繊維強化樹脂製のエネルギ吸収部材は、軸方向の衝突荷重を受けたときに、筒形状の外側に向かって開きながら、あるいは、筒形状の内側に向かって巻き込みながら圧壊することが想定されている。このとき、エネルギ吸収部材の先端部と接合部材との接着強度が大きいと、エネルギ吸収部材の先端部が接合部材から剥離しにくくなって、圧壊特性が変わってしまい、所望の発現荷重が得られないおそれがある。   However, it is assumed that the energy absorbing member made of fiber reinforced resin is crushed while being opened toward the outside of the cylindrical shape or being wound toward the inside of the cylindrical shape when receiving an axial collision load. ing. At this time, if the adhesive strength between the tip of the energy absorbing member and the joining member is large, the tip of the energy absorbing member is less likely to peel off from the joining member, and the crush characteristics change, and the desired developed load is obtained. There is no fear.

そこで、本発明は、上記問題に鑑みてなされたものであり、本発明の目的とするところは、エネルギ吸収部材の荷重入力予定側の端部と接合部材との接合面が、所定の引張力に耐え得る一方、車両の衝突時に容易に剥離可能な、エネルギ吸収部材の保持構造を提供することにある。   Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a bonding surface of an end portion on a load input scheduled side of an energy absorbing member and a bonding member with a predetermined tensile force. It is an object of the present invention to provide a holding structure of an energy absorbing member that can easily withstand peeling of the vehicle at the time of a vehicle collision.

上記課題を解決するために、本発明のある観点によれば、車体のバンパビームとフレームとの間に配置されるエネルギ吸収部材の保持構造において、衝突荷重入力時に軸方向に圧壊して衝突エネルギを吸収する繊維強化樹脂製の筒状のエネルギ吸収部材と、前記エネルギ吸収部材のうちの荷重入力予定側の端部の内周面又は外周面に接着剤により接合され、前記エネルギ吸収部材の前記端部からさらに前記荷重入力予定側に延在する接合部材と、を備え、前記接合部材は、前記軸方向に対して交差する方向に沿って設けられて、前記エネルギ吸収部材との接合面側とは反対側に突出するビード部を備え、前記ビード部は、前記エネルギ吸収部材と前記接合部材との接合領域に重ならない位置、かつ、前記バンパビームに重ならない位置に設けられる、エネルギ吸収部材の保持構造が提供される。 In order to solve the above-mentioned problems, according to one aspect of the present invention, in a holding structure of an energy absorbing member disposed between a bumper beam and a frame of a vehicle body, the collision energy is crushed axially when a collision load is input. The end portion of the energy absorbing member is bonded with an adhesive to the cylindrical energy absorbing member made of fiber reinforced resin and the inner peripheral surface or the outer peripheral surface of the end portion on the load input planned side of the energy absorbing member, and the end of the energy absorbing member A joining member extending further to the load input scheduled side from a part, and the joining member is provided along a direction intersecting the axial direction, and a joining surface side with the energy absorbing member has a bead portion that protrudes to the opposite side, the bead portion does not overlap the junction region between the joining member and the energy absorbing member position, and provided in a position that does not overlap the bumper beam Is Ru, the holding structure of the energy absorbing member.

前記接合部材は、前記軸方向に沿って設けられたスリットにより複数に分割されてもよい。   The joining member may be divided into a plurality of slits by slits provided along the axial direction.

前記接合部材の前記荷重入力予定側の端部が接合される基部を備え、前記接合部材における、前記ビード部から前記基部との接合位置までの距離が、前記ビード部から前記エネルギ吸収部材との接合位置までの距離よりも短くてもよい。 The joint member includes a base to which an end portion on the load input scheduled side of the joint member is joined, and a distance from the bead portion to a joint position with the base in the joint member is the distance between the bead portion and the energy absorbing member It may be shorter than the distance to the bonding position.

前記接合部材は前記エネルギ吸収部材の内周面に接合され、前記ビード部は前記接合部材の内側に突出してもよい。   The bonding member may be bonded to the inner circumferential surface of the energy absorbing member, and the bead may protrude to the inside of the bonding member.

前記接合部材における、前記ビード部よりも前記荷重入力予定側に位置する部分が、前記エネルギ吸収部材の前記端部の周方向の外側に対応する位置にあってもよい。 The portion of the joining member located closer to the load input than the bead portion may be at a position corresponding to the outer side in the circumferential direction of the end portion of the energy absorbing member.

以上説明したように本発明によれば、エネルギ吸収部材の荷重入力予定側の端部と接合部材との接合面が、車両の牽引時等に生じる所定の引張力に耐え得る一方、車両の衝突時に容易に剥離可能になる。   As described above, according to the present invention, the joint surface between the end portion on the load input scheduled side of the energy absorbing member and the joint member can withstand a predetermined tensile force generated during traction of the vehicle, etc. Sometimes it becomes easy to peel off.

第１の実施の形態にかかるエネルギ吸収部材の保持構造を示す断面図である。It is sectional drawing which shows the holding structure of the energy absorption member concerning 1st Embodiment. 接合部材を示す斜視図である。It is a perspective view which shows a joining member. エネルギ吸収部材に接合された接合部材を軸方向に見た図である。It is the figure which looked at the joining member joined to the energy absorption member in the direction of an axis. 接合面に要求される接着強度について説明するための図である。It is a figure for demonstrating the adhesive strength requested | required of a joint surface. エネルギ吸収部材の保持構造の設計要件を示す説明図である。It is explanatory drawing which shows the design requirements of the holding structure of an energy absorption member. 衝突時に発生する剥離力について説明するための図である。It is a figure for demonstrating the exfoliation force which occurs at the time of a collision. 第２の実施の形態にかかるエネルギ吸収部材の保持構造を示す断面図である。It is sectional drawing which shows the holding structure of the energy absorption member concerning 2nd Embodiment. 衝突時に発生する剥離力について説明するための図である。It is a figure for demonstrating the exfoliation force which occurs at the time of a collision. 第３の実施の形態にかかるエネルギ吸収部材の保持構造を示す断面図である。It is sectional drawing which shows the holding structure of the energy absorption member concerning 3rd Embodiment. 衝突時に発生する剥離力について説明するための図である。It is a figure for demonstrating the peeling force which generate | occur | produces at the time of a collision.

以下に添付図面を参照しながら、本発明の好適な実施の形態について詳細に説明する。なお、本明細書及び図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複説明を省略する。また、本明細書及び図面において、実質的に同一の機能構成を有する複数の構成要素を、同一の符号の後に異なるアルファベットを付して区別する場合もある。ただし、実質的に同一の機能構成を有する複数の構成要素の各々を特に区別する必要がない場合、同一符号のみを付する。   The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. In the present specification and the drawings, components having substantially the same functional configuration will be assigned the same reference numerals and redundant description will be omitted. Further, in the present specification and the drawings, a plurality of components having substantially the same functional configuration may be distinguished by attaching different alphabets to the same reference numerals. However, when it is not necessary to distinguish each of a plurality of components having substantially the same functional configuration, only the same reference numerals will be given.

＜１．第１の実施の形態＞
図１は、本発明の第１の実施の形態にかかるエネルギ吸収部材の保持構造１００の一例を示す。図１は、繊維強化樹脂（ＦＲＰ）製のエネルギ吸収部材１０が車両に取り付けられ、保持される様子を車両の上方側から見た断面図である。図１において、上方が車両の前方側であり、下方が車両の後方側である。以下の説明において、車両の前方側を先端側といい、車両の後方側を後端側という場合がある。 <1. First embodiment>
FIG. 1 shows an example of a holding structure 100 of an energy absorbing member according to a first embodiment of the present invention. FIG. 1 is a cross-sectional view of a state in which an energy absorbing member 10 made of fiber reinforced resin (FRP) is attached to a vehicle and held, as viewed from the upper side of the vehicle. In FIG. 1, the upper side is the front side of the vehicle, and the lower side is the rear side of the vehicle. In the following description, the front side of the vehicle may be referred to as a front end side, and the rear side of the vehicle may be referred to as a rear end side.

図１において、エネルギ吸収部材１０は、先端側が第１の保持部材２０によって保持され、後端側が第２の保持部材４０によって保持されている。第１の保持部材２０は、車両の衝突時に、衝突荷重を受け得る部位の近傍に固定されている。本実施形態では、第１の保持部材２０はバンパビーム２に接合されている。また、第２の保持部材４０は、フロントフレーム４の先端側に接合されている。エネルギ吸収部材１０は、バンパビーム２とフロントフレーム４との間に配置され、バンパビーム２に接続された先端側が、荷重入力予定側である。   In FIG. 1, the energy absorbing member 10 is held by the first holding member 20 at the front end side and by the second holding member 40 at the rear end side. The first holding member 20 is fixed in the vicinity of a portion that can receive a collision load at the time of a collision of a vehicle. In the present embodiment, the first holding member 20 is joined to the bumper beam 2. In addition, the second holding member 40 is joined to the front end side of the front frame 4. The energy absorbing member 10 is disposed between the bumper beam 2 and the front frame 4, and the tip end side connected to the bumper beam 2 is the load input scheduled side.

（１−１．エネルギ吸収部材）
エネルギ吸収部材１０は、車両が、先行車両や障害物その他の対象物に衝突したときに衝突荷重を受けて圧壊し、衝突エネルギを吸収する部材である。また、エネルギ吸収部材１０は、衝突荷重が大きい場合には、荷重をフロントフレーム４に適切に伝達する役割も担う。かかるエネルギ吸収部材１０は、繊維強化樹脂により形成される。本実施形態では、エネルギ吸収部材１０は、熱硬化性樹脂と炭素繊維とを用いた炭素繊維強化樹脂（ＣＦＲＰ）により形成され、高強度、かつ、軽量化を実現可能になっている。 (1-1. Energy absorbing member)
The energy absorbing member 10 is a member that receives a collision load and collapses when the vehicle collides with a preceding vehicle or an obstacle or other object, and absorbs collision energy. The energy absorbing member 10 also plays a role of appropriately transmitting the load to the front frame 4 when the collision load is large. The energy absorbing member 10 is formed of a fiber reinforced resin. In the present embodiment, the energy absorbing member 10 is formed of a carbon fiber reinforced resin (CFRP) using a thermosetting resin and a carbon fiber, so that high strength and weight reduction can be realized.

ＦＲＰ製のエネルギ吸収部材１０は、衝突時に、連続的に破壊されながら潰れることにより荷重が発現し、荷重変動の少ない安定した衝撃エネルギ吸収を実現することができる。また、ＦＲＰ製のエネルギ吸収部材１０は、潰れ残りが少なく、単位重量当たりの衝撃エネルギ吸収量が大きいという特性を有する。かかるＦＲＰ製のエネルギ吸収部材１０は、例えば、組紐と縦紐とによって構成される組み物を用いた複合材料としてもよい。   At the time of a collision, the FRP energy absorbing member 10 is continuously broken while being crushed and a load is expressed, so that stable impact energy absorption with less load fluctuation can be realized. In addition, the energy absorbing member 10 made of FRP has characteristics such that the amount of impact energy absorption per unit weight is small with a small amount of remaining uncrushed. The energy absorbing member 10 made of FRP may be, for example, a composite material using an assembly constituted by a braid and a string.

エネルギ吸収部材１０を構成する繊維強化樹脂に使用される強化繊維は、特に限定されない。例えば、炭素繊維やガラス繊維等のセラミックス繊維、アラミド繊維等の有機繊維、さらにはこれらを組み合わせた強化繊維を使用することができる。中でも、高い機械特性や強度設計の行いやすさ等の観点から、炭素繊維を含むことが好ましい。   The reinforcing fiber used for the fiber reinforced resin which comprises the energy absorption member 10 is not specifically limited. For example, ceramic fibers such as carbon fibers and glass fibers, organic fibers such as aramid fibers, and reinforcing fibers combining these can be used. Among them, it is preferable to include carbon fiber from the viewpoint of high mechanical properties and easiness of strength design.

また、エネルギ吸収部材１０を構成する繊維強化樹脂のマトリックス樹脂としては、熱硬化性樹脂であってもよく、熱可塑性樹脂であってもよい。熱硬化性樹脂の場合、その主材としては、例えば、エポキシ樹脂、不飽和ポリエステル樹脂、ビニルエステル樹脂、フェノール樹脂、ポリウレタン樹脂、シリコン樹脂などが例示され、このうちの１種類、あるいは２種類以上の混合物を使用してもよい。これらの熱硬化性樹脂をマトリックス樹脂に採用する場合、熱硬化性樹脂に適切な硬化剤や反応促進剤を添加することが可能である。   Moreover, as matrix resin of the fiber reinforced resin which comprises the energy absorption member 10, a thermosetting resin may be sufficient and a thermoplastic resin may be sufficient. In the case of a thermosetting resin, examples of the main material include epoxy resin, unsaturated polyester resin, vinyl ester resin, phenol resin, polyurethane resin, silicone resin, etc., and one or two or more of them are listed. You may use the mixture of. When these thermosetting resins are employed as a matrix resin, it is possible to add an appropriate curing agent or reaction accelerator to the thermosetting resin.

熱可塑性樹脂の場合、その主材としては、例えば、ポリエチレン樹脂、ポリプロピレン樹脂、ポリ塩化ビニル樹脂、ＡＢＳ樹脂、ポリスチレン樹脂、ＡＳ樹脂、ポリアミド樹脂、ポリアセタール樹脂、ポリカーボネート樹脂、熱可塑性ポリエステル樹脂、ＰＰＳ（ポリフェニレンサルファイド）樹脂、フッ素樹脂、ポリエーテルイミド樹脂、ポリエーテルケトン樹脂、ポリイミド樹脂などが例示され、このうちの１種類、あるいは２種類以上の混合物を使用してもよい。これら熱可塑性樹脂は単独でも、混合物でも、また共重合体であってもよい。混合物の場合には相溶化剤を併用してもよい。さらに、難燃剤として臭素系難燃剤、シリコン系難燃剤、赤燐などを加えてもよい。比較的大量生産することが求められる自動車用の部材には、成形のしやすさ、量産性の面から、熱可塑性樹脂を使用することが好ましい。   In the case of a thermoplastic resin, the main material thereof is, for example, polyethylene resin, polypropylene resin, polyvinyl chloride resin, ABS resin, polystyrene resin, AS resin, polyamide resin, polyacetal resin, polycarbonate resin, thermoplastic polyester resin, PPS ( Polyphenylene sulfide) resin, fluorine resin, polyether imide resin, polyether ketone resin, polyimide resin and the like are exemplified, and one or a mixture of two or more of them may be used. These thermoplastic resins may be used alone, as a mixture, or as a copolymer. In the case of a mixture, a compatibilizer may be used in combination. Furthermore, a brominated flame retardant, a silicon flame retardant, red phosphorus etc. may be added as a flame retardant. It is preferable to use a thermoplastic resin as a member for automobiles required to be mass-produced relatively from the viewpoint of easiness of molding and mass productivity.

この場合、使用される熱可塑性樹脂としては、例えば、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、ナイロン６、ナイロン６６等のポリアミド系樹脂、ポリエチレンテレフタレート、ポリブチレンテレフタレート等のポリエステル系樹脂、ポリエーテルケトン、ポリエーテルスルフォン、芳香族ポリアミド等の樹脂が挙げられる。   In this case, examples of the thermoplastic resin to be used include polyolefin resins such as polyethylene and polypropylene, polyamide resins such as nylon 6 and nylon 66, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polyether ketone, Resins, such as polyether sulfone and aromatic polyamide, are mentioned.

また、エネルギ吸収部材１０は中空の筒形状をなし、軸方向が、車両の前後方向に沿うように配置される。かかるエネルギ吸収部材１０の寸法は、車両の大きさや、得ようとする衝撃エネルギ吸収量、エネルギ吸収部材１０の重量等によって適宜設計可能である。例えば、エネルギ吸収部材１０の軸方向長さは１３０〜２００ｍｍであり、内側空間の直径は４０〜７０ｍｍであり、厚さは３ｍｍである。   Further, the energy absorbing member 10 has a hollow cylindrical shape, and the axial direction is disposed along the longitudinal direction of the vehicle. The dimensions of the energy absorbing member 10 can be appropriately designed according to the size of the vehicle, the amount of impact energy absorption to be obtained, the weight of the energy absorbing member 10 and the like. For example, the axial length of the energy absorbing member 10 is 130 to 200 mm, the diameter of the inner space is 40 to 70 mm, and the thickness is 3 mm.

（１−２．第１の保持部材）
エネルギ吸収部材１０の先端側の端部は、第１の保持部材２０に対して、接着剤等により接合される。第１の保持部材２０は、鉄等に代表される金属からなる。第１の保持部材２０は、基部２１と、基部２１に接合されてエネルギ吸収部材１０の軸方向に沿ってエネルギ吸収部材１０側に延びる接合部材２２とを有する。基部２１は、バンパビーム２に接合されている。基部２１における接合部材２２が接合される面は、エネルギ吸収部材１０の軸方向に対して直交している。 (1-2. First holding member)
The end of the energy absorbing member 10 on the tip side is bonded to the first holding member 20 by an adhesive or the like. The first holding member 20 is made of metal typified by iron or the like. The first holding member 20 includes a base 21 and a bonding member 22 which is bonded to the base 21 and extends in the axial direction of the energy absorbing member 10 toward the energy absorbing member 10. The base 21 is joined to the bumper beam 2. The surface of the base 21 to which the joining member 22 is joined is orthogonal to the axial direction of the energy absorbing member 10.

接合部材２２は、全体として円筒形状を有し、先端側の端部が基部２１に接合され、後端側の端部がエネルギ吸収部材１０に接合される。これにより、筒状のエネルギ吸収部材１０の先端側が第１の保持部材２０に保持される。基部２１に対する接合部材２２の接合方法は、超音波溶接や隅肉溶接等の溶接であってもよいし、接着剤による接合であってもよい。また、図示していないが、接合部材２２の先端側の端部に、基部２１の接合面に対向するフランジを設け、当該フランジを介して接合部材２２と基部２１とが接合されていてもよい。   The joint member 22 has a cylindrical shape as a whole, and the end on the tip end side is joined to the base 21 and the end on the rear end side is joined to the energy absorbing member 10. Thereby, the front end side of the cylindrical energy absorbing member 10 is held by the first holding member 20. The bonding method of the bonding member 22 to the base 21 may be welding such as ultrasonic welding or fillet welding, or may be bonding using an adhesive. Further, although not shown, a flange facing the joint surface of the base 21 may be provided at the end on the tip end side of the joint member 22, and the joint member 22 and the base 21 may be joined via the flange. .

また、接合部材２２は、後端側の端部において、エネルギ吸収部材１０の先端側の端部に接合される。すなわち、本実施形態では、エネルギ吸収部材１０の先端側の端部が基部２１に当接せずに、エネルギ吸収部材１０が接合部材２２により保持される。エネルギ吸収部材１０は繊維強化樹脂製であり、接合部材２２は金属製であることから、エネルギ吸収部材１０と接合部材２２とは接着剤により接合される。   Further, the joining member 22 is joined to the end on the tip side of the energy absorbing member 10 at the end on the rear end side. That is, in the present embodiment, the energy absorbing member 10 is held by the bonding member 22 without the end on the tip side of the energy absorbing member 10 coming into contact with the base 21. Since the energy absorbing member 10 is made of fiber reinforced resin and the joining member 22 is made of metal, the energy absorbing member 10 and the joining member 22 are joined by an adhesive.

エネルギ吸収部材１０と接合部材２２との接合に用いられる接着剤としては、エポキシ樹脂系の接着剤や、アクリル樹脂系の接着剤をはじめとして、ウレタン樹脂系等の接着剤を適宜使用することができる。   As an adhesive used for joining the energy absorbing member 10 and the joining member 22, an adhesive such as an epoxy resin based adhesive, an acrylic resin based adhesive, and an urethane resin based adhesive may be appropriately used. it can.

また、本実施形態では、接合部材２２は、エネルギ吸収部材１０の内周面に対して接合されている。筒状のエネルギ吸収部材１０の場合、型や芯材の周囲に繊維強化樹脂を配して成形されることが多く、エネルギ吸収部材１０の内周面の仕上がり精度は、外周面の仕上がり精度に比べて高くなっていることが多い。したがって、接合部材２２をエネルギ吸収部材１０の内周面に対して接合することによって、接合安定性を向上させることができる。   Further, in the present embodiment, the bonding member 22 is bonded to the inner circumferential surface of the energy absorbing member 10. In the case of the cylindrical energy absorbing member 10, it is often formed by arranging a fiber reinforced resin around the mold and the core material, and the finishing accuracy of the inner peripheral surface of the energy absorbing member 10 is the finish accuracy of the outer peripheral surface. It is often higher than it is. Therefore, by bonding the bonding member 22 to the inner circumferential surface of the energy absorbing member 10, bonding stability can be improved.

接合部材２２とエネルギ吸収部材１０との接合面の軸方向の幅は、例えば１０〜３０ｍｍの範囲内とすることができる。接合部材２２とエネルギ吸収部材１０との接合部分の軸方向の幅が短すぎると、接合強度を確保することができず、牽引時の引張力に耐えられないおそれがある。また、接合部材２２とエネルギ吸収部材１０との接合部分の軸方向の幅が長すぎると、接合強度が高くなりすぎて、衝突荷重の入力時に、エネルギ吸収部材１０を接合部材２２から剥離させにくくなるおそれがある。したがって、エネルギ吸収部材１０の直径が５０ｍｍ程度の場合、当該接合面の幅は、１５〜２５ｍｍの範囲内とすることが好ましい。   The axial width of the joint surface between the joint member 22 and the energy absorbing member 10 can be, for example, in the range of 10 to 30 mm. If the axial width of the joint portion between the joint member 22 and the energy absorbing member 10 is too short, the joint strength can not be secured and there is a possibility that the joint can not withstand the tensile force at the time of pulling. In addition, if the axial width of the bonding portion between the bonding member 22 and the energy absorbing member 10 is too long, the bonding strength becomes too high and it is difficult to separate the energy absorbing member 10 from the bonding member 22 when a collision load is input. May be Therefore, when the diameter of the energy absorbing member 10 is about 50 mm, the width of the bonding surface is preferably in the range of 15 to 25 mm.

なお、接合部材２２とエネルギ吸収部材１０との接合面とは、接着剤が接合部材２２及びエネルギ吸収部材１０にともに接している領域を指し、接合部材２２とエネルギ吸収部材１０とが接着剤を介さずに単に重なり合っている領域は接合面に含まれない。   The bonding surface between the bonding member 22 and the energy absorbing member 10 refers to a region in which the adhesive is in contact with both the bonding member 22 and the energy absorbing member 10, and the bonding member 22 and the energy absorbing member 10 are adhesive. The area which simply overlaps without intervening is not included in the joint surface.

本実施形態において、接合部材２２は、軸方向に対して交差する方向に沿って設けられて、エネルギ吸収部材１０に対して接合される面側とは反対側に突出するビード部２４を有する。本実施形態では、接合部材２２の後端側の端部の外周面がエネルギ吸収部材１０の先端側の端部の内周面に接合され、ビード部２４は、接合部材２２の内側方向に向かって突出するように設けられている。   In the present embodiment, the joining member 22 is provided along a direction intersecting with the axial direction, and has a bead portion 24 projecting on the opposite side to the side of the energy absorbing member 10 to be joined. In the present embodiment, the outer peripheral surface of the rear end side end of the bonding member 22 is bonded to the inner peripheral surface of the front end side end of the energy absorbing member 10, and the bead portion 24 is directed inward of the bonding member 22. It is provided to project.

図２及び図３は、本実施形態にかかるエネルギ吸収部材１０の保持構造１００に用いられる第１の保持部材２０に備えられた接合部材２２について説明するための図である。図２は、接合部材２２のみを示す斜視図であり、図３は、接合部材２２が接合されたエネルギ吸収部材１０を軸方向から見た図である。   FIG.2 and FIG.3 is a figure for demonstrating the joining member 22 with which the 1st holding member 20 used for the holding structure 100 of the energy absorption member 10 concerning this embodiment was equipped. FIG. 2 is a perspective view showing only the joining member 22, and FIG. 3 is a view of the energy absorbing member 10 to which the joining member 22 is joined as viewed from the axial direction.

本実施形態において、エネルギ吸収部材１０は円筒状を有している。接合部材２２は、エネルギ吸収部材１０と同心円状に配置され、全体として円筒状を有している。接合部材２２は、軸方向に沿って設けられたスリットによって、複数の部分に分割されている。図示した例では、接合部材２２はスリットによって６個の部分に分割されている。かかる接合部材２２は、軸方向に沿って先端側に位置し、基部２１に接合される第１の部分２２ａと、軸方向に沿って後端側に位置し、エネルギ吸収部材１０に接合される第２の部分２２ｂとを有する。   In the present embodiment, the energy absorbing member 10 has a cylindrical shape. The bonding member 22 is disposed concentrically with the energy absorbing member 10 and has a cylindrical shape as a whole. The joining member 22 is divided into a plurality of portions by slits provided along the axial direction. In the illustrated example, the joining member 22 is divided into six parts by slits. The joining member 22 is located on the tip side along the axial direction, and is located on the rear end side along the axial direction with the first portion 22a joined to the base 21 and joined to the energy absorbing member 10 And a second portion 22b.

接合部材２２は、軸方向に沿って中央部分に位置し、第１の部分２２ａ及び第２の部分２２ｂの間に設けられたビード部２４を備える。ビード部２４は、軸方向に対して交差するように周方向に延びて設けられている。すなわち、接合部材２２を全体的に見ると、ビード部２４は、第１の部分２２ａ及び第２の部分２２ｂよりも縮径した部分となっている。   The joint member 22 includes a bead portion 24 located at a central portion along the axial direction and provided between the first portion 22a and the second portion 22b. The bead portion 24 extends in the circumferential direction so as to intersect with the axial direction. That is, when the joint member 22 is viewed as a whole, the bead portion 24 has a diameter smaller than that of the first portion 22a and the second portion 22b.

かかるビード部２４は、車両の衝突時にバンパビーム２に衝突荷重が入力され、基部２１から接合部材２２へと衝突荷重が伝達されたときに、応力が集中し得る部分として設けられている。したがって、車両の衝突時には、接合部材２２がビード部２４の位置で折れやすくなっている。   The bead portion 24 is provided as a portion where stress can be concentrated when a collision load is input to the bumper beam 2 at the time of a collision of a vehicle and the collision load is transmitted from the base 21 to the joining member 22. Therefore, at the time of a collision of the vehicle, the joining member 22 is easily broken at the position of the bead portion 24.

このとき、ビード部２４が、エネルギ吸収部材１０に対する接合面とは反対側に向けて突出していることから、衝突荷重によってビード部２４が折れる際に、第２の部分２２ｂをエネルギ吸収部材１０から離す方向に移動させる曲げ力が生じる。その結果、接合部材２２の第２の部分２２ｂは、エネルギ吸収部材１０の先端側から剥離する。これにより、比較的小さい荷重で、接合部材２２をエネルギ吸収部材１０から剥離させることができる。したがって、接合部材２２から剥離させられたエネルギ吸収部材１０は、例えば外周側に開きながらスムーズに潰れ、所望の発現荷重を得ることができる。   At this time, since the bead portion 24 protrudes toward the opposite side to the bonding surface with respect to the energy absorbing member 10, when the bead portion 24 is broken by the collision load, the second portion 22b is removed from the energy absorbing member 10 A bending force is generated to move in the release direction. As a result, the second portion 22 b of the bonding member 22 peels off from the distal end side of the energy absorbing member 10. Thereby, the bonding member 22 can be peeled off from the energy absorbing member 10 with a relatively small load. Therefore, the energy absorbing member 10 peeled off from the bonding member 22 is smoothly crushed, for example, while being opened to the outer peripheral side, and a desired developed load can be obtained.

本実施形態では、接合部材２２が、軸方向に沿って形成されたスリットによって複数に分割されているため、第２の部分２２ｂがエネルギ吸収部材１０から剥離して内側に向かって移動する際の抵抗が小さくなっている。接合部材２２が複数に分割されておらず、周方向に切れ目のない円筒状を有している場合、第２の部分２２ｂがエネルギ吸収部材１０から剥離して内側に向かって移動するには、第２の部分２２ｂを縮径する押圧力が必要になる。これに対して、接合部材２２が複数に分割されている場合には、接合部材２２を縮径する押圧力が不要となるために、接合部材２２をエネルギ吸収部材１０から剥離させるための荷重が低減する。   In the present embodiment, since the joining member 22 is divided into a plurality of parts by the slits formed along the axial direction, the second portion 22 b peels from the energy absorbing member 10 and moves inward. Resistance is getting smaller. In the case where the bonding member 22 is not divided into a plurality and has a cylindrical shape without a break in the circumferential direction, the second portion 22 b is to be separated from the energy absorbing member 10 and moved inward: A pressing force is required to reduce the diameter of the second portion 22b. On the other hand, when the joining member 22 is divided into a plurality of pieces, the pressing force for reducing the diameter of the joining member 22 is not necessary, so the load for peeling the joining member 22 from the energy absorbing member 10 is Reduce.

接合部材２２を分割して構成する場合の数や、分割されたそれぞれの部分の周方向の長さ、スリットの周方向の幅は、接合部材２２とエネルギ吸収部材１０との接合強度や接合部材２２が担う荷重等を考慮して、適宜設定することができる。また、スリットは、接合部材２２の軸方向の全体にわたって延びていなくてもよい。例えば、スリットは、少なくとも第２の部分２２ｂ及びビード部２４の位置に対応して設けられていればよい。   The number of divisions of the bonding member 22, the circumferential length of each divided portion, and the circumferential width of the slit are the bonding strength between the bonding member 22 and the energy absorbing member 10, and the bonding member. It can be set as appropriate in consideration of the load and the like which 22 carries. In addition, the slits may not extend in the entire axial direction of the joining member 22. For example, the slits may be provided corresponding to the positions of at least the second portion 22 b and the bead portion 24.

ここで、接合部材２２に設けられるビード部２４の作用について説明する。車両の前方への衝突時の衝突エネルギを吸収するエネルギ吸収部材１０の場合、車両の牽引時等、エネルギ吸収部材１０への引張力が作用したときに、エネルギ吸収部材１０と接合部材２２との接合面にはせん断力が負荷される。このとき、図４に示すように、エネルギ吸収部材１０と接合部材２２との接合面には、引張せん断力に耐え得る接着強度が要求される。   Here, the operation of the bead portion 24 provided on the bonding member 22 will be described. In the case of the energy absorbing member 10 absorbing the collision energy at the time of the frontal collision of the vehicle, when a tensile force is applied to the energy absorbing member 10, such as when the vehicle is pulled, the energy absorbing member 10 and the joining member 22 Shear force is applied to the joint surface. At this time, as shown in FIG. 4, the bonding surface between the energy absorbing member 10 and the bonding member 22 is required to have adhesive strength that can withstand tensile shear force.

また、かかるエネルギ吸収部材１０では、衝突時等、エネルギ吸収部材１０への圧縮力が作用したときにおいても、エネルギ吸収部材１０と接合部材２２との接合面にはせん断力が負荷される。このとき、ビード部２４のような、エネルギ吸収部材１０からの接合部材２２の剥離を容易にする構造が備えられていないと、エネルギ吸収部材１０への引張力の発生時及び圧縮力の発生時のどちらに対しても同等のせん断力が負荷される。   In addition, in the energy absorbing member 10, a shearing force is applied to the bonding surface between the energy absorbing member 10 and the bonding member 22 even when a compressive force acts on the energy absorbing member 10, such as at the time of a collision. At this time, if there is no structure such as the bead portion 24 for facilitating peeling of the joining member 22 from the energy absorbing member 10, generation of tensile force and generation of compressive force to the energy absorbing member 10 The same shear force is applied to both.

一方、車両の衝突時においてエネルギ吸収部材１０による衝突エネルギの吸収効果を発揮させるためには、エネルギ吸収部材１０への圧縮力の発生時において、接合面の接着が容易に破壊されることが望ましい。したがって、エネルギ吸収部材１０と接合部材２２とを接着剤により接合してエネルギ吸収部材１０を保持する場合、車両の牽引時及び衝突時それぞれに要求される特性を満たすためには、以下の関係を満たすように保持構造１００を設計することが望ましい。   On the other hand, in order to exert the absorbing effect of the collision energy by the energy absorbing member 10 at the time of a collision of a vehicle, it is desirable that adhesion of the joint surface is easily broken at the time of generation of a compressive force to the energy absorbing member 10 . Therefore, when the energy absorbing member 10 and the joining member 22 are joined with an adhesive to hold the energy absorbing member 10, the following relationship is satisfied in order to satisfy the characteristics required for traction and collision of the vehicle: It is desirable to design the retention structure 100 to fill.

設計要件：圧縮時の設計荷重＞接着強度＞引張時の設計荷重   Design requirements: Design load at compression> Adhesive strength> Design load at tension

ただし、接着剤の劣化や、製造時における接着剤の塗布行程の精度のバラツキ等を考慮すると、エネルギ吸収部材１０の保持構造１００の設計幅には制約がある。図５は、エネルギ吸収部材１０の保持構造１００の設計要件について説明するために示す図である。図５において、点線Ｆｃが圧縮時の設計荷重を示し、点線Ｆｔが引張時の設計荷重を示す。また、実線Ａ及び実線Ｂは、それぞれ異なる接着剤Ａ，Ｂの接着強度の経時変化を示す。   However, the design width of the holding structure 100 of the energy absorbing member 10 is restricted in consideration of the deterioration of the adhesive, the variation in the accuracy of the application process of the adhesive at the time of manufacture, and the like. FIG. 5 is a figure shown in order to demonstrate the design requirement of the holding structure 100 of the energy absorption member 10. In FIG. 5, the dotted line Fc indicates the design load at the time of compression, and the dotted line Ft indicates the design load at the time of tension. The solid line A and the solid line B show the change with time of the adhesive strength of the different adhesives A and B, respectively.

例えば、接着剤Ａを用いる場合、初期の接着強度が上記の設計要件を満たすものの、例えば接着剤塗布時のバラツキ等により、時間の経過に伴って接着剤が劣化し、接着強度が引張時の設計荷重を下回るおそれがある。一方、接着剤Ｂを用いる場合、時間の経過に伴う劣化後の接着強度が設計要件に収まるように余裕を見た場合、初期の接着強度が圧縮時の設計荷重を上回るおそれがある。   For example, in the case of using the adhesive A, although the initial adhesive strength satisfies the above design requirements, the adhesive deteriorates with the passage of time due to, for example, variations in adhesive application, and the adhesive strength is tensile. There is a risk of falling below the design load. On the other hand, in the case of using the adhesive B, there is a possibility that the initial adhesive strength may exceed the design load at the time of compression when the adhesive strength after deterioration with the lapse of time is considered to be within the design requirements.

これに対して、本実施形態にかかるエネルギ吸収部材１０の保持構造１００では、接合部材２２にビード部２４が設けられている。図６に示すように、ビード部２４は、車両の衝突時にエネルギ吸収部材１０に対して圧縮力が作用したときに、応力集中によって折れるため、接合部材２２はエネルギ吸収部材１０の先端側から順に剥離する。これにより、接合部材２２は、比較的小さい荷重によってエネルギ吸収部材１０から剥離する。   On the other hand, in the holding structure 100 of the energy absorbing member 10 according to the present embodiment, the bead portion 24 is provided on the bonding member 22. As shown in FIG. 6, since the bead portion 24 is broken due to stress concentration when a compressive force acts on the energy absorbing member 10 at the time of a collision of a vehicle, the joining member 22 is in order from the tip end side of the energy absorbing member 10 Peel off. Thereby, the joining member 22 peels off from the energy absorbing member 10 by a relatively small load.

したがって、例えば図５に示した接着剤Ｂを用いてエネルギ吸収部材１０の保持構造１００を設計した場合であっても、初期の段階から、引張力に耐え得る接着強度を確保しつつ、衝突時にはエネルギ吸収部材１０が接合部材２２から容易に剥離するようになる。このようにして、本実施形態にかかるエネルギ吸収部材１０の保持構造１００では、設計要件の幅を拡大することが可能になる。   Therefore, even when the holding structure 100 of the energy absorbing member 10 is designed using, for example, the adhesive B shown in FIG. 5, the adhesive strength which can withstand the tensile force is secured from the initial stage, at the time of the collision. The energy absorbing member 10 is easily peeled off from the bonding member 22. Thus, in the holding structure 100 of the energy absorbing member 10 according to the present embodiment, the width of the design requirement can be expanded.

このような機能を有するビード部２４は、エネルギ吸収部材１０の先端と基部２１との間のいずれかの位置に設けられていればよい。ただし、ビード部２４の軸方向の位置が、接合部材２２とエネルギ吸収部材１０との接合面から近すぎると、接合部材２２をエネルギ吸収部材１０から剥離させるために要する曲げ力が著しく大きくなる場合がある。したがって、ビード部２４の軸方向の位置は、エネルギ吸収部材１０との接合面から離れていることが好ましい。   The bead portion 24 having such a function may be provided at any position between the distal end of the energy absorbing member 10 and the base 21. However, when the axial position of the bead portion 24 is too close to the joining surface between the joining member 22 and the energy absorbing member 10, the bending force required to peel the joining member 22 from the energy absorbing member 10 becomes extremely large. There is. Therefore, it is preferable that the axial position of the bead portion 24 be away from the joint surface with the energy absorbing member 10.

ただし、ビード部２４をエネルギ吸収部材１０との接合面から離すことは、接合部材２２の軸方向の長さを長くすることでもあり、エネルギ吸収部材１０の保持構造１００の全長が過度に長くなるおそれがある。したがって、接合部材２２において、第１の部分２２ａの軸方向の長さが、第２の部分２２ｂの軸方向の長さよりも短いことが好ましい。これにより、接着剤の剥離のために要する荷重を小さくするために、エネルギ吸収部材１０との接合面からビード部２４までの距離を確保した場合であっても、エネルギ吸収部材１０の保持構造１００の全長が長くなることを抑制することができる。   However, separating the bead portion 24 from the joint surface with the energy absorbing member 10 is also an increase in the axial length of the joint member 22, and the overall length of the holding structure 100 of the energy absorbing member 10 becomes excessively long. There is a fear. Therefore, in the joining member 22, it is preferable that the axial length of the first portion 22a be shorter than the axial length of the second portion 22b. Thereby, in order to reduce the load required for peeling off the adhesive, even when the distance from the bonding surface with the energy absorbing member 10 to the bead portion 24 is secured, the holding structure 100 of the energy absorbing member 10 It can be suppressed that the total length of

かかるビード部２４の突出幅は、想定する衝突荷重の大きさに対する剥離力を考慮して、適宜設定することができる。また、接合部材２２を軸方向に対して交差する方向に見たときのビード部２４の断面形状は、図１に示すような湾曲形状に限られない。ビード部２４の断面形状は、三角形状や矩形状であってもよく、これらの形状が複数段になって重なっていてもよい。   The protrusion width of the bead portion 24 can be appropriately set in consideration of the peeling force with respect to the magnitude of the assumed collision load. Moreover, the cross-sectional shape of the bead part 24 when the joining member 22 is seen in the direction which cross | intersects with respect to an axial direction is not restricted to a curved shape as shown in FIG. The cross-sectional shape of the bead portion 24 may be triangular or rectangular, and these shapes may overlap in a plurality of stages.

（１−３．第２の保持部材）
第２の保持部材４０は、鉄等に代表される金属からなり、エネルギ吸収部材１０の後端側の端部を保持する。本実施形態にかかるエネルギ吸収部材１０の保持構造１００において、第２の保持部材４０の構成は特に限定されない。図１に例示した第２の保持部材４０は、フロントフレーム４の先端に取り付けられるプレート状の部材であって、エネルギ吸収部材１０の後端側の端部が接着剤によって接合されている。 (1-3. Second holding member)
The second holding member 40 is made of metal typified by iron or the like, and holds the end of the energy absorbing member 10 on the rear end side. In the holding structure 100 of the energy absorbing member 10 according to the present embodiment, the configuration of the second holding member 40 is not particularly limited. The second holding member 40 illustrated in FIG. 1 is a plate-like member attached to the front end of the front frame 4 and the end portion on the rear end side of the energy absorbing member 10 is bonded by an adhesive.

第２の保持部材４０に、エネルギ吸収部材１０の軸方向に沿って延びる立上り部を設けて、当該立上り部とエネルギ吸収部材１０の内周面又は外周面とを接合してもよい。かかる立上り部を用いて接合することにより、エネルギ吸収部材１０と第２の保持部材４０との接合面積が大きくなって、接合安定性が向上する。   The second holding member 40 may be provided with a rising portion extending along the axial direction of the energy absorbing member 10, and the rising portion may be joined to the inner circumferential surface or the outer circumferential surface of the energy absorbing member 10. By bonding using such rising portions, the bonding area between the energy absorbing member 10 and the second holding member 40 is increased, and bonding stability is improved.

立上り部を設ける場合、エネルギ吸収部材１０の内周面又は外周面のうち、第１の保持部材２０の接合部材２２が接合される面とは反対側の面に対して立上り部を接合してもよい。このように構成した場合、エネルギ吸収部材１０の圧壊時に、第１の保持部材２０の接合部材２２と第２の保持部材４０の立上り部との接触を避けることができる。したがって、エネルギ吸収部材１０の圧壊時に、第１の保持部材２０の基部２１と第２の保持部材４０との距離が極力近づけられ、エネルギ吸収部材１０の潰れ残り量を低減することができる。   When providing the rising portion, the rising portion is joined to the surface of the inner peripheral surface or the outer peripheral surface of the energy absorbing member 10 opposite to the surface to which the bonding member 22 of the first holding member 20 is joined. It is also good. When configured in this manner, contact between the bonding member 22 of the first holding member 20 and the rising portion of the second holding member 40 can be avoided when the energy absorbing member 10 is crushed. Therefore, at the time of crushing of the energy absorbing member 10, the distance between the base 21 of the first holding member 20 and the second holding member 40 can be made as close as possible, and the remaining amount of crushing of the energy absorbing member 10 can be reduced.

立上り部は、第２の保持部材４０とは別部材であって、第２の保持部材４０に対して溶接等により接合されるものでもよく、プレス成形等によって、第２の保持部材４０と一体的に成形されるものでもよい。   The rising portion is a separate member from the second holding member 40 and may be joined to the second holding member 40 by welding or the like, and may be integrally formed with the second holding member 40 by press molding or the like. It may be molded in the same manner.

また、第２の保持部材４０は、エネルギ吸収部材１０の内側空間に対応する位置に、開口部を有してもよい。かかる開口部は、エネルギ吸収部材１０の圧壊時に、内側空間に向かって潰れたＦＲＰ材料をエネルギ吸収部材１０の外部に排出する通路である。したがって、潰れたＦＲＰ材料がエネルギ吸収部材１０の内側空間に詰まることによるエネルギ吸収部材１０の潰れ残りの発生が抑制される。なお、開口部の代わりに、フロントフレーム４側に突出する凹部が設けられてもよい。   Further, the second holding member 40 may have an opening at a position corresponding to the inner space of the energy absorbing member 10. Such an opening is a passage for discharging the FRP material crushed toward the inner space to the outside of the energy absorbing member 10 when the energy absorbing member 10 is crushed. Therefore, the generation of the unshrinkage residue of the energy absorbing member 10 due to the clogged FRP material clogging the inner space of the energy absorbing member 10 is suppressed. Note that, instead of the opening, a recess may be provided that protrudes to the front frame 4 side.

以上のように、本実施形態にかかるエネルギ吸収部材１０の保持構造１００によれば、エネルギ吸収部材１０の先端側の端部に接合される第１の保持部材２０の接合部材２２が、所定のビード部２４を有している。かかるビード部２４は、車両の衝突発生時に応力集中によって折れるため、接合部材２２の第２の部分２２ｂには、エネルギ吸収部材１０から離れる方向の曲げ力が発生する。そのため、接合部材２２は、エネルギ吸収部材１０から離れる方向に移動することになり、エネルギ吸収部材１０は、小さい荷重で接合部材２２から剥離する。   As described above, according to the holding structure 100 of the energy absorbing member 10 according to the present embodiment, the joining member 22 of the first holding member 20 joined to the end of the energy absorbing member 10 on the front end side is a predetermined one. It has a bead portion 24. The bead portion 24 is broken due to stress concentration when a collision of a vehicle occurs, so that a bending force in a direction away from the energy absorbing member 10 is generated in the second portion 22 b of the joint member 22. Therefore, the bonding member 22 moves in the direction away from the energy absorbing member 10, and the energy absorbing member 10 peels off from the bonding member 22 with a small load.

これにより、車両の牽引時等の引張力にも耐え得るように、接合部材２２とエネルギ吸収部材１０との接着強度を高くした場合であっても、車両の衝突時等の圧縮力の作用時においては、エネルギ吸収部材１０を接合部材２２から容易に剥離させることができる。したがって、本実施形態にかかるエネルギ吸収部材１０の保持構造１００は、設計要件の幅を拡大することができる。   As a result, even when the bonding strength between the joining member 22 and the energy absorbing member 10 is increased so as to withstand tensile force at the time of traction of the vehicle, etc., at the time of application of compressive force at the time of vehicle collision or the like. In this case, the energy absorbing member 10 can be easily peeled off from the bonding member 22. Therefore, the holding structure 100 of the energy absorbing member 10 according to the present embodiment can expand the width of the design requirement.

また、本実施形態にかかるエネルギ吸収部材１０の保持構造１００は、車両の衝突発生時において、エネルギ吸収部材１０が接合部材２２から容易に剥離して、例えば、エネルギ吸収部材１０の外周部に開きながら潰れやすくなる。これにより、車両の衝突発生時において、所望の発現荷重を得ることができる。   Further, in the holding structure 100 of the energy absorbing member 10 according to the present embodiment, the energy absorbing member 10 is easily peeled off from the joining member 22 at the time of collision of the vehicle, and opens at the outer peripheral portion of the energy absorbing member 10, for example. It becomes easy to be crushed. Thereby, at the time of a collision of a vehicle, a desired developed load can be obtained.

＜２．第２の実施の形態＞
次に、本発明の第２の実施の形態にかかるエネルギ吸収部材１０の保持構造について説明する。第１の実施の形態では、第１の保持部材２０の接合部材２２が、エネルギ吸収部材１０の内周面に対して接合されていたが、第２の実施の形態では、接合部材が、エネルギ吸収部材１０の外周面に対して接合される。 <2. Second embodiment>
Next, the holding structure of the energy absorbing member 10 according to the second embodiment of the present invention will be described. In the first embodiment, the bonding member 22 of the first holding member 20 is bonded to the inner peripheral surface of the energy absorbing member 10, but in the second embodiment, the bonding member is the energy The outer peripheral surface of the absorbing member 10 is joined.

図７は、本実施形態にかかるエネルギ吸収部材１０の保持構造における、エネルギ吸収部材１０に接合された第１の保持部材２０の断面図を示す。かかる第１の保持部材２０に設けられた接合部材５２は、先端側の端部が基部２１に接合され、後端側の端部がエネルギ吸収部材１０の外周面に接着剤により接合される。また、接合部材５２は、軸方向に対して交差する方向に沿って設けられて、接合部材２２の外側方向に向かって突出するビード部５４を有する。   FIG. 7 shows a cross-sectional view of the first holding member 20 joined to the energy absorbing member 10 in the holding structure of the energy absorbing member 10 according to the present embodiment. The end on the tip end side of the joining member 52 provided on the first holding member 20 is joined to the base 21, and the end on the rear end side is joined to the outer peripheral surface of the energy absorbing member 10 by an adhesive. Further, the joining member 52 has a bead portion 54 provided along a direction intersecting with the axial direction and protruding in the outward direction of the joining member 22.

図８に示すように、本実施形態にかかるエネルギ吸収部材１０の保持構造においても、車両の衝突時にエネルギ吸収部材１０に対して圧縮力が作用したときに、ビード部５４が応力集中によって折れるため、接合部材５２はエネルギ吸収部材１０の先端側から順に剥離する。これにより、接合部材５２は、比較的小さい荷重によってエネルギ吸収部材１０から剥離する。   As shown in FIG. 8, also in the holding structure of the energy absorbing member 10 according to the present embodiment, the bead portion 54 is broken due to stress concentration when a compressive force is applied to the energy absorbing member 10 at the time of a vehicle collision. The bonding member 52 peels off sequentially from the tip side of the energy absorbing member 10. Thereby, the bonding member 52 peels off from the energy absorbing member 10 by a relatively small load.

本実施形態では、接合部材５２がエネルギ吸収部材１０の先端側の端部の外周面に接合されており、エネルギ吸収部材１０の圧壊時に、第２の部分５２ｂがエネルギ吸収部材１０から剥離した後、第１の部分５２ａがエネルギ吸収部材１０の先端部の外周部に配置される。これにより、エネルギ吸収部材１０の先端部が内側空間に向かって潰れやすくなっている。接合部材５２は、ここで説明した点以外については、第１の実施の形態にかかる接合部材２２の場合と同様の構成とすることができる。   In the present embodiment, the bonding member 52 is bonded to the outer peripheral surface of the end portion of the tip end side of the energy absorbing member 10, and the second portion 52b is peeled from the energy absorbing member 10 when the energy absorbing member 10 is crushed. The first portion 52 a is disposed on the outer peripheral portion of the distal end portion of the energy absorbing member 10. Thus, the tip of the energy absorbing member 10 is easily crushed toward the inner space. The bonding member 52 can have the same configuration as that of the bonding member 22 according to the first embodiment except for the points described here.

本実施形態にかかるエネルギ吸収部材１０の保持構造は、車両の牽引時等の引張力に耐え得るように、接合部材５２とエネルギ吸収部材１０との接着強度を高くした場合であっても、車両の衝突時等の圧縮力の作用時においては、エネルギ吸収部材１０を接合部材５２から容易に剥離させることができる。したがって、本実施形態にかかるエネルギ吸収部材１０の保持構造は、設計要件の幅を拡大することができる。   The holding structure of the energy absorbing member 10 according to the present embodiment is a vehicle even when the bonding strength between the bonding member 52 and the energy absorbing member 10 is increased so as to withstand the tensile force at the time of traction of the vehicle, etc. The energy absorbing member 10 can be easily peeled off from the bonding member 52 when a compressive force is applied, such as at the time of a collision. Therefore, the holding structure of the energy absorbing member 10 according to the present embodiment can expand the width of the design requirement.

また、本実施形態にかかるエネルギ吸収部材１０の保持構造は、車両の衝突発生時において、エネルギ吸収部材１０が接合部材５２から容易に剥離して、例えば、エネルギ吸収部材１０の内側空間に向かって潰れやすくなる。これにより、車両の衝突発生時において、所望の発現荷重を得ることができる。また、エネルギ吸収部材１０が内側空間に向かって潰れることにより、潰れたＦＲＰ材料の周囲への飛散が防止される。   Further, in the holding structure of the energy absorbing member 10 according to the present embodiment, the energy absorbing member 10 is easily peeled off from the joining member 52 at the time of collision of the vehicle, for example, toward the inner space of the energy absorbing member 10 It becomes easy to collapse. Thereby, at the time of a collision of a vehicle, a desired developed load can be obtained. In addition, the energy absorbing member 10 is crushed toward the inner space, thereby preventing scattering of the crushed FRP material to the periphery.

＜３．第３の実施の形態＞
次に、本発明の第３の実施の形態にかかるエネルギ吸収部材１０の保持構造について説明する。第１の実施の形態では、接合部材２２の第１の部分２２ａと第２の部分２２ｂとが同一面上に配置されており、第２の部分２２ｂにおいてエネルギ吸収部材１０の内周面に接合されていた。これに対して、第３の実施の形態では、接合部材の後端部がエネルギ吸収部材１０の内周面に接合され、基部に接合される先端部がエネルギ吸収部材１０の外側に対応する位置に配置される。 <3. Third embodiment>
Next, the holding structure of the energy absorbing member 10 according to the third embodiment of the present invention will be described. In the first embodiment, the first portion 22a and the second portion 22b of the bonding member 22 are disposed on the same plane, and the second portion 22b is bonded to the inner circumferential surface of the energy absorbing member 10 It had been. On the other hand, in the third embodiment, the rear end of the joining member is joined to the inner peripheral surface of the energy absorbing member 10, and the tip end joined to the base corresponds to the outside of the energy absorbing member 10. Will be placed.

図９は、本実施形態にかかるエネルギ吸収部材１０の保持構造における、エネルギ吸収部材１０に接合された第１の保持部材２０の断面図を示す。かかる第１の保持部材２０において、接合部材６２の第２の部分６２ｂがエネルギ吸収部材１０の内側空間に対応する位置に配置される一方、第１の部分６２ａがエネルギ吸収部材１０の外側に対応する位置に配置される。また、接合部材６２は、軸方向に対して交差する方向に沿って設けられて、接合部材６２の内側方向に向かって突出するビード部６４を有する。   FIG. 9 shows a cross-sectional view of the first holding member 20 joined to the energy absorbing member 10 in the holding structure of the energy absorbing member 10 according to the present embodiment. In the first holding member 20, the second portion 62b of the joining member 62 is disposed at a position corresponding to the inner space of the energy absorbing member 10, while the first portion 62a corresponds to the outer side of the energy absorbing member 10. Placed in the Further, the joining member 62 has a bead portion 64 which is provided along a direction intersecting with the axial direction and protrudes in the inward direction of the joining member 62.

図１０に示すように、本実施形態にかかるエネルギ吸収部材１０の保持構造においても、車両の衝突時にエネルギ吸収部材１０に対して圧縮力が作用したときに、ビード部６４が応力集中によって折れるため、接合部材６２はエネルギ吸収部材１０の先端側から順に剥離する。これにより、接合部材６２は、比較的小さい荷重によってエネルギ吸収部材１０から剥離する。   As shown in FIG. 10, also in the holding structure of the energy absorbing member 10 according to the present embodiment, the bead portion 64 is broken due to stress concentration when a compressive force is applied to the energy absorbing member 10 at the time of a vehicle collision. The bonding member 62 peels off sequentially from the front end side of the energy absorbing member 10. Thereby, the joining member 62 peels off from the energy absorbing member 10 by a relatively small load.

本実施形態では、接合部材６２の第１の部分６２ａが、エネルギ吸収部材１０の外側に対応する位置に配置されており、エネルギ吸収部材１０の圧壊時に、第２の部分６２ｂがエネルギ吸収部材１０から剥離した後、第１の部分６２ａがエネルギ吸収部材１０の先端部の外周部に配置される。これにより、エネルギ吸収部材１０の先端部が内側空間に向かって潰れやすくなっている。接合部材６２は、ここで説明した点以外については、第１の実施の形態にかかる接合部材２２の場合と同様の構成とすることができる。   In the present embodiment, the first portion 62 a of the joining member 62 is disposed at a position corresponding to the outside of the energy absorbing member 10, and the second portion 62 b acts as the energy absorbing member 10 when the energy absorbing member 10 is crushed. The first portion 62 a is disposed on the outer peripheral portion of the tip of the energy absorbing member 10. Thus, the tip of the energy absorbing member 10 is easily crushed toward the inner space. The bonding member 62 can have the same configuration as that of the bonding member 22 according to the first embodiment except for the points described here.

本実施形態にかかるエネルギ吸収部材１０の保持構造は、車両の牽引時等の引張力に耐え得るように、接合部材６２とエネルギ吸収部材１０との接着強度を高くした場合であっても、車両の衝突時等の圧縮力の作用時においては、エネルギ吸収部材１０を接合部材６２から容易に剥離させることができる。したがって、本実施形態にかかるエネルギ吸収部材１０の保持構造は、設計要件の幅を拡大することができる。   The holding structure of the energy absorbing member 10 according to the present embodiment is a vehicle even when the bonding strength between the bonding member 62 and the energy absorbing member 10 is increased so as to withstand the tensile force at the time of traction of the vehicle, etc. The energy absorbing member 10 can be easily peeled off from the joining member 62 when a compressive force is applied, such as at the time of a collision. Therefore, the holding structure of the energy absorbing member 10 according to the present embodiment can expand the width of the design requirement.

また、本実施形態にかかるエネルギ吸収部材１０の保持構造は、車両の衝突発生時において、エネルギ吸収部材１０が接合部材６２から容易に剥離しつつ、エネルギ吸収部材１０の内側空間に向かって潰れやすくなる。これにより、車両の衝突発生時において、所望の発現荷重を得ることができる。また、エネルギ吸収部材１０が内側空間に向かって潰れることにより、潰れたＦＲＰ材料の周囲への飛散が防止される。   Further, in the holding structure of the energy absorbing member 10 according to the present embodiment, the energy absorbing member 10 is easily peeled toward the inner space of the energy absorbing member 10 while the energy absorbing member 10 is easily peeled off from the joining member 62 when a collision of a vehicle occurs. Become. Thereby, at the time of a collision of a vehicle, a desired developed load can be obtained. In addition, the energy absorbing member 10 is crushed toward the inner space, thereby preventing scattering of the crushed FRP material to the periphery.

以上、添付図面を参照しながら本発明の好適な実施形態について詳細に説明したが、本発明はかかる例に限定されない。本発明の属する技術の分野における通常の知識を有する者であれば、特許請求の範囲に記載された技術的思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、これらについても、当然に本発明の技術的範囲に属するものと了解される。また、上記の各実施形態を互いに組み合わせた態様も、当然に本発明の技術的範囲に属する。   Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is obvious that those skilled in the art to which the present invention belongs can conceive of various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also fall within the technical scope of the present invention. In addition, an aspect in which the above-described embodiments are combined with one another naturally belongs to the technical scope of the present invention.

２ バンパビーム
４ フロントフレーム
１０ エネルギ吸収部材
２０ 第１の保持部材
２１ 基部
２２，５２，６２ 接合部材
２２ａ，５２ａ，６２ａ 第１の部分
２２ｂ，５２ｂ，６２ｂ 第２の部分
２４，５４，６４ ビード部
４０ 第２の保持部材
４４，６４，７４ 開口部
１００ エネルギ吸収部材の保持構造
2 bumper beam 4 front frame 10 energy absorbing member 20 first holding member 21 base 22, 52, 62 joint member 22a, 52a, 62a first portion 22b, 52b, 62b second portion 24, 54, 64 bead portion 40 Second holding member 44, 64, 74 Opening 100 Holding structure of energy absorbing member

Claims (5)

車体のバンパビームとフレームとの間に配置されるエネルギ吸収部材の保持構造において、
衝突荷重入力時に軸方向に圧壊して衝突エネルギを吸収する繊維強化樹脂製の筒状のエネルギ吸収部材と、
前記エネルギ吸収部材のうちの荷重入力予定側の端部の内周面又は外周面に接着剤により接合され、前記エネルギ吸収部材の前記端部からさらに前記荷重入力予定側に延在する接合部材と、を備え、
前記接合部材は、前記軸方向に対して交差する方向に沿って設けられて、前記エネルギ吸収部材との接合面側とは反対側に突出するビード部を備え、
前記ビード部は、前記エネルギ吸収部材と前記接合部材との接合領域に重ならない位置、かつ、前記バンパビームに重ならない位置に設けられる、エネルギ吸収部材の保持構造。 In a holding structure of an energy absorbing member disposed between a bumper beam and a frame of a vehicle body,
A tubular energy absorbing member made of a fiber reinforced resin that axially crushes to absorb collision energy when a collision load is input;
A bonding member which is joined by an adhesive to an inner peripheral surface or an outer peripheral surface of an end portion on the load input scheduled side of the energy absorbing member, and extends from the end portion of the energy absorbing member to the load input scheduled side. , And
The joining member is provided along a direction intersecting with the axial direction, and includes a bead portion that protrudes on the opposite side to the joining surface side with the energy absorbing member .
The bead portion, the position does not overlap with the junction region between the energy absorbing member and the joining member, and the Ru is provided in a position that does not cover the bumper beam, the holding structure of the energy absorbing member. 衝突荷重入力時に軸方向に圧壊して衝突エネルギを吸収する繊維強化樹脂製の筒状のエネルギ吸収部材と、
前記エネルギ吸収部材のうちの荷重入力予定側の端部の内周面又は外周面に接着剤により接合され、前記エネルギ吸収部材の前記端部からさらに前記荷重入力予定側に延在する接合部材と、を備え、
前記接合部材は、前記軸方向に対して交差する方向に沿って設けられて、前記エネルギ吸収部材との接合面側とは反対側に突出するビード部を備え、
前記接合部材は、前記軸方向に沿って設けられたスリットにより複数に分割されている、エネルギ吸収部材の保持構造。 A tubular energy absorbing member made of a fiber reinforced resin that axially crushes to absorb collision energy when a collision load is input;
A bonding member which is joined by an adhesive to an inner peripheral surface or an outer peripheral surface of an end portion on the load input scheduled side of the energy absorbing member, and extends from the end portion of the energy absorbing member to the load input scheduled side. , And
The joining member is provided along a direction intersecting with the axial direction, and includes a bead portion that protrudes on the opposite side to the joining surface side with the energy absorbing member.
The joining member is divided into a plurality by a slit provided along the axial direction, the holding structure of the d Nerugi absorbing member. 前記接合部材の前記荷重入力予定側の端部が接合される基部を備え、
前記接合部材における、前記ビード部から前記基部との接合位置までの距離が、前記ビード部から前記エネルギ吸収部材との接合位置までの距離よりも短い、請求項１又は２に記載のエネルギ吸収部材の保持構造。 It has a base to which the end on the load input scheduled side of the joining member is joined,
The energy absorbing member according to claim 1 or 2, wherein a distance from the bead portion to a bonding position with the base in the bonding member is shorter than a distance from the bead portion to the bonding position with the energy absorbing member. Retention structure. 前記接合部材は前記エネルギ吸収部材の内周面に接合され、前記ビード部は前記接合部材の内側に突出する、請求項１〜３のいずれか１項に記載のエネルギ吸収部材の保持構造。   The holding structure of an energy absorbing member according to any one of claims 1 to 3, wherein the joining member is joined to an inner circumferential surface of the energy absorbing member, and the bead portion protrudes inside the joining member. 前記接合部材における、前記ビード部よりも前記荷重入力予定側に位置する部分が、前記エネルギ吸収部材の前記端部の周方向の外側に対応する位置にある、請求項１〜４のいずれか１項に記載のエネルギ吸収部材の保持構造。 5. The bonding member according to claim 1, wherein a portion of the joining member positioned closer to the load input than the bead portion is at a position corresponding to the outer side in the circumferential direction of the end portion of the energy absorbing member. The holding structure of the energy absorption member as described in a term.
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