JP6963043B2

JP6963043B2 - Impact mitigation structure

Info

Publication number: JP6963043B2
Application number: JP2020009487A
Authority: JP
Inventors: 輝明相澤; 達也石崎; 裕之緑川; 伸一郎佐藤; 慶太片岡
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2021-11-05
Anticipated expiration: 2040-01-23
Also published as: JP2021115924A

Description

本発明は、車両の衝撃緩和構造体に関する。 The present invention relates to a vehicle impact mitigation structure.

車両の前突荷重（エネルギ）を吸収する構造として、特許文献１には、バンパビームの前側に発泡体を配置するとともに、バンパビームと発泡体との間、詳細には、発泡体の後部に形成された凹部内においてチューブを車幅方向に延びるように配置する構造が記載されている。 As a structure for absorbing the front impact load (energy) of the vehicle, in Patent Document 1, a foam is arranged on the front side of the bumper beam, and is formed between the bumper beam and the foam, in detail, at the rear of the foam. A structure is described in which the tube is arranged so as to extend in the vehicle width direction in the recess.

特表２０１４−５０５６２９号公報Japanese Patent Application Laid-Open No. 2014-505629

特許文献１に記載の構造において、発泡体の前後方向寸法は、エネルギ吸収に必要な長さとエネルギ吸収後の潰れ残りの長さの和によって決まる。そのため、特許文献１に記載の構造には、前後方向の寸法を小さくすることができないという問題がある。 In the structure described in Patent Document 1, the anteroposterior dimension of the foam is determined by the sum of the length required for energy absorption and the length of the uncrushed residue after energy absorption. Therefore, the structure described in Patent Document 1 has a problem that the dimensions in the front-rear direction cannot be reduced.

かかる事情に鑑み、本願出願人は、前突に対するエネルギ吸収量を確保しつつ前後方向の寸法を小さくすることが可能な衝突検知構造を開発した（国際公開２０１９−０８２２８５号参照）。衝突検知構造は、車幅方向に延設される圧力発生チューブと、前記圧力発生チューブの後側に設けられる板形状の後壁部と、前記圧力発生チューブの前側に設け、前後方向に延設される板形状の延出壁部を有するチューブ圧縮部と、前記延出壁部と対向し、当該延出壁部との間に前記圧力発生チューブを保持するチューブ保持部材を備えている。 In view of such circumstances, the applicant of the present application has developed a collision detection structure capable of reducing the size in the front-rear direction while ensuring the amount of energy absorbed for the front collision (see International Publication No. 2019-082285). The collision detection structure is provided in the pressure generating tube extending in the vehicle width direction, the plate-shaped rear wall portion provided on the rear side of the pressure generating tube, and the front side of the pressure generating tube, and extends in the front-rear direction. A tube compression portion having a plate-shaped extending wall portion to be formed, and a tube holding member facing the extending wall portion and holding the pressure generating tube between the extending wall portions are provided.

かかる衝突検知構造において、後壁部及びチューブ圧縮部の車幅方向両端部は、バンパビームに沿って湾曲しており、車両前面に対して傾斜した傾斜部となっている。かかる傾斜部の前方において衝突が発生した場合には、衝突物が車幅方向外方に滑り、前突荷重が延出壁部を回動させるモーメントとして作用せず、延出壁部の折れ曲がりによる衝撃緩和を好適に行うことができないおそれがある。 In such a collision detection structure, both ends of the rear wall portion and the tube compression portion in the vehicle width direction are curved along the bumper beam, and are inclined portions inclined with respect to the front surface of the vehicle. When a collision occurs in front of such an inclined portion, the colliding object slides outward in the vehicle width direction, the front impact load does not act as a moment to rotate the extending wall portion, and the extending wall portion is bent. Impact mitigation may not be performed favorably.

本発明は、前記の点に鑑みてなされたものであり、傾斜部において衝撃緩和を好適に行うことが可能な衝撃緩和構造体を提供することを課題とする。 The present invention has been made in view of the above points, and an object of the present invention is to provide an impact mitigation structure capable of suitably performing impact mitigation in an inclined portion.

前記した課題を解決するために、本発明の衝撃緩和構造体は、車幅方向に延在するとともに、車両のバンパビームの前側に設けられる板形状のベース部と、車幅方向に延在するとともに、前記ベース部から車体前方に延設されるプレート部と、を備え、前記ベース部及び前記プレート部は、車幅方向中央から車幅方向外方にずれた位置に、平面視で車幅方向外方に向かうにつれて後方に傾斜する傾斜部を有し、前記プレート部は、前記傾斜部において上面又は下面から突出するボックス形状部を有し、前記ボックス形状部の前端部は、前記傾斜部と略平行な受圧部であることを特徴とする。 In order to solve the above-mentioned problems, the impact mitigation structure of the present invention extends in the vehicle width direction, and also extends in the vehicle width direction with a plate-shaped base portion provided on the front side of the bumper beam of the vehicle. A plate portion extending from the base portion to the front of the vehicle body is provided, and the base portion and the plate portion are located at positions deviated outward from the center in the vehicle width direction in the vehicle width direction in a plan view. The plate portion has a box-shaped portion that inclines rearward as it goes outward, the plate portion has a box-shaped portion that protrudes from the upper surface or the lower surface in the inclined portion, and the front end portion of the box-shaped portion has the inclined portion. It is characterized in that it is a substantially parallel pressure receiving portion.

本発明によると、ボックス形状部が前突荷重を受けるので、傾斜部において衝撃緩和を好適に行うことができる。 According to the present invention, since the box-shaped portion receives the front impact load, the impact mitigation can be suitably performed in the inclined portion.

本発明の実施形態に係る車両用バンパを模式的に示す分解斜視図である。It is an exploded perspective view which shows typically the bumper for a vehicle which concerns on embodiment of this invention. 本発明の実施形態に係る車両用バンパを模式的に示すII−II線断面図である。FIG. 5 is a sectional view taken along line II-II schematically showing a vehicle bumper according to an embodiment of the present invention. ベース部（後壁部）を模式的に示す背面図である。It is a rear view which shows typically the base part (rear wall part). 本発明の実施形態に係る車両用バンパの傾斜部を模式的に示す斜視図である。It is a perspective view which shows typically the inclined part of the bumper for a vehicle which concerns on embodiment of this invention. 本発明の実施形態に係る車両用バンパの傾斜部を模式的に示すＶ−Ｖ線断面図である。It is a VV line sectional view which shows typically the inclined part of the bumper for a vehicle which concerns on embodiment of this invention.

本発明の実施形態について、本発明の衝撃緩和構造体を、例えば歩行者の衝突エネルギを吸収するために車両のフロントバンパ（車両用バンパ）に適用した場合を例にとり、図面を参照して詳細に説明する。以下の説明において、同一の要素には同一の符号を付し、重複する説明は省略する。また、前後、上下、左右といった方向を表す表現は、車両の乗員を基準とする。 Details of the embodiment of the present invention are taken with reference to the drawings, for example, when the impact mitigation structure of the present invention is applied to a front bumper (vehicle bumper) of a vehicle in order to absorb collision energy of a pedestrian, for example. Explain to. In the following description, the same elements are designated by the same reference numerals, and duplicate description will be omitted. In addition, expressions representing directions such as front-back, up-down, and left-right are based on the occupants of the vehicle.

図１に示すように、本発明の実施形態に係る車両用バンパ１Ｘは、例えば車両の前部に衝突物（例えば、歩行者）が衝突した際に、衝撃を緩和する（衝突エネルギを吸収する）とともに、かかる衝突を検知するための構造である。図１及び図２に示すように、車両用バンパ１Ｘは、車両前部のバンパビーム２及びバンパフェース３と、バンパビーム２及びバンパフェース３の間に設けられている衝撃緩和構造体１Ｙと、衝撃緩和構造体１Ｙの圧力発生部４に接続される左右一対の圧力センサ５，５と、を備える。衝撃緩和構造体１Ｙは、車幅方向に延設される圧力発生部４と、エネルギ吸収部材６と、補強部材４０と、を備える。 As shown in FIG. 1, the vehicle bumper 1X according to the embodiment of the present invention cushions an impact (absorbs collision energy), for example, when a colliding object (for example, a pedestrian) collides with the front part of the vehicle. ), And a structure for detecting such a collision. As shown in FIGS. 1 and 2, the vehicle bumper 1X includes a bumper beam 2 and a bumper face 3 at the front of the vehicle, an impact mitigation structure 1Y provided between the bumper beam 2 and the bumper face 3, and an impact mitigation structure 1Y. A pair of left and right pressure sensors 5 and 5 connected to the pressure generating portion 4 of the structure 1Y are provided. The shock absorbing structure 1Y includes a pressure generating portion 4 extending in the vehicle width direction, an energy absorbing member 6, and a reinforcing member 40.

＜バンパビーム＞
バンパビーム２は、車両前部において車幅方向に延設される金属製部材である。バンパビーム２は、平面視で前方に凸状の弓型形状を呈する。すなわち、バンパビーム２は、車幅方向中央部が最も前方に位置し、車幅方向端部に行くにつれて後方に下がる形状を呈する。バンパビーム２の車幅方向両端部は、当該バンパビーム２の後側において前後方向に延設される車両の骨格部材（フロントサイドメンバ）に連結されている。車両の衝突（前突）時には、バンパビーム２は、当該バンパビーム２に入力される衝突荷重（エネルギ）を前記骨格部材に伝達する。 <Bumper beam>
The bumper beam 2 is a metal member extending in the vehicle width direction at the front portion of the vehicle. The bumper beam 2 exhibits a bow-shaped shape that is convex forward in a plan view. That is, the bumper beam 2 has a shape in which the central portion in the vehicle width direction is located at the foremost position and the bumper beam 2 is lowered rearward toward the end portion in the vehicle width direction. Both ends of the bumper beam 2 in the vehicle width direction are connected to a skeleton member (front side member) of the vehicle extending in the front-rear direction on the rear side of the bumper beam 2. At the time of a vehicle collision (front collision), the bumper beam 2 transmits the collision load (energy) input to the bumper beam 2 to the skeleton member.

図２に示すように、バンパビーム２は、側面視で、前後方向に延設される上壁部２ａと、上壁部２ａの前端部から下方に延設される前壁部２ｂと、前壁部２ｂの下端部から後方に延設される中間上壁部２ｃと、を一体に備える。また、バンパビーム２は、側面視で、中間上壁部２ｃの後端部から下方に延設される中間前壁部２ｄと、中間前壁部２ｄの下端部から前方に延設される中間下壁部２ｅと、中間下壁部２ｅの前端部から下方に延設される前壁部２ｆと、前壁部２ｆの下端部から後方に延設される下壁部２ｇと、を一体に備える。 As shown in FIG. 2, the bumper beam 2 has an upper wall portion 2a extending in the front-rear direction, a front wall portion 2b extending downward from the front end portion of the upper wall portion 2a, and a front wall in a side view. An intermediate upper wall portion 2c extending rearward from the lower end portion of the portion 2b is integrally provided. Further, the bumper beam 2 has an intermediate front wall portion 2d extending downward from the rear end portion of the intermediate upper wall portion 2c and an intermediate lower portion extending forward from the lower end portion of the intermediate front wall portion 2d in a side view. The wall portion 2e, the front wall portion 2f extending downward from the front end portion of the intermediate lower wall portion 2e, and the lower wall portion 2g extending rearward from the lower end portion of the front wall portion 2f are integrally provided. ..

すなわち、バンパビーム２の前面には、中間上壁部２ｃ、中間前壁部２ｄ及び中間下壁部２ｅによって構成される凹部が形成されている。後記する圧力発生部４、エネルギ吸収部材６の圧縮部２０及び補強部材４０は、かかる凹部の前方に配置されており、組付及び分解が容易化されている。また、上下の前壁部２ｂ，２ｆには、それぞれ孔部２ｂ１，２ｆ１が形成されている。 That is, a recess formed by the intermediate upper wall portion 2c, the intermediate front wall portion 2d, and the intermediate lower wall portion 2e is formed on the front surface of the bumper beam 2. The pressure generating portion 4, the compression portion 20 of the energy absorbing member 6, and the reinforcing member 40, which will be described later, are arranged in front of such a recess, facilitating assembly and disassembly. Further, holes 2b1 and 2f1 are formed in the upper and lower front wall portions 2b and 2f, respectively.

＜バンパフェース＞
バンパフェース３は、バンパビーム２の前方に設けられ、車両の外表面（意匠面）を構成する樹脂製部材又は金属製部材である。バンパフェース３は、側面視で、前後方向に延設される上壁部３ａと、上壁部３ａの前端部から下方に延設される前壁部３ｂと、前壁部３ｂの下端部から後方に延設される下壁部３ｃと、を一体に備える。 <Bumper face>
The bumper face 3 is a resin member or a metal member provided in front of the bumper beam 2 and constituting the outer surface (design surface) of the vehicle. The bumper face 3 is viewed from the side view from the upper wall portion 3a extending in the front-rear direction, the front wall portion 3b extending downward from the front end portion of the upper wall portion 3a, and the lower end portion of the front wall portion 3b. A lower wall portion 3c extending rearward is integrally provided.

＜圧力発生部＞
圧力発生部４は、バンパビーム２とバンパフェース３との間、より詳細には、後記するベース部１０と緩衝部１Ｚとの間において、車幅方向に延設されている。圧力発生部４は、可撓性を有する中空（チューブ状）の樹脂製部材（圧力発生チューブ）であり、荷重によって圧縮されて潰れると、内部の流体（例えば、空気）に圧力を発生させる。 <Pressure generator>
The pressure generating portion 4 extends in the vehicle width direction between the bumper beam 2 and the bumper face 3, and more specifically, between the base portion 10 and the cushioning portion 1Z, which will be described later. The pressure generating portion 4 is a flexible hollow (tube-shaped) resin member (pressure generating tube), and when it is compressed by a load and crushed, a pressure is generated in an internal fluid (for example, air).

＜圧力センサ＞
図１に示すように、左右一対の圧力センサ５，５は、それぞれ圧力発生部４の両端部に接続されている。圧力センサ５は、圧力発生部４の潰れ変形によって発生した内部流体の圧力を検出し、検出結果を制御部（図示せず）へ出力する。制御部は、左右一対の圧力センサ５，５の検出結果に基づいて、例えば、車両の前部に設けられる動力室のフード（ボンネット）を上げることによって衝突物（例えば、歩行者）を保護する制御を実行する。 <Pressure sensor>
As shown in FIG. 1, the pair of left and right pressure sensors 5 and 5 are connected to both ends of the pressure generating portion 4, respectively. The pressure sensor 5 detects the pressure of the internal fluid generated by the crushing deformation of the pressure generating unit 4, and outputs the detection result to the control unit (not shown). The control unit protects a colliding object (for example, a pedestrian) by raising the hood (bonnet) of the power chamber provided at the front of the vehicle, for example, based on the detection results of the pair of left and right pressure sensors 5 and 5. Take control.

＜エネルギ吸収部材＞
エネルギ吸収部材６は、バンパビーム２とバンパフェース３との間に設けられる樹脂製部材（例えば、ＰＰ（ポリプロピレン製））である。エネルギ吸収部材６は、例えば射出成型によって形成されており、衝突検知遅れの無い剛性を有する。エネルギ吸収部材６は、車両の衝突（前突）時に、前突荷重（エネルギ）を吸収するとともに、圧力発生部４を圧縮して当該圧力発生部４内の流体に圧力を発生させる。図２に示すように、エネルギ吸収部材６は、ベース部１０と、圧縮部２０と、ヒンジ部３０と、を一体に備える。 <Energy absorption member>
The energy absorbing member 6 is a resin member (for example, PP (polypropylene)) provided between the bumper beam 2 and the bumper face 3. The energy absorbing member 6 is formed by, for example, injection molding, and has rigidity without a collision detection delay. At the time of a vehicle collision (front collision), the energy absorbing member 6 absorbs the front collision load (energy) and compresses the pressure generating unit 4 to generate pressure in the fluid in the pressure generating unit 4. As shown in FIG. 2, the energy absorbing member 6 integrally includes a base portion 10, a compression portion 20, and a hinge portion 30.

≪ベース部≫
ベース部（後壁部）１０は、圧力発生部４の後側に配置されており、上下方向及び左右方向に延設される（すなわち、前額面方向に延びる）長板状部である。図１に示すように、ベース部１０は、バンパビーム２に沿うように、平面視で前方に凸状の弓型形状を呈する。すなわち、ベース部１０は、車幅方向中央部が最も前方に位置し、車幅方向端部に行くにつれて後方に下がる形状を呈する。図３に示すように、ベース部１０には、矩形状を呈する孔部１１と、当該孔部１１の上縁部から下方に延設される係止部１２と、当該孔部１１の下縁部から上方に延設される脱落防止部１３と、の組み合わせが、車幅方向に複数形成されている。係止部１２は、後記する孔部４４ａの周縁部に係止可能な爪形状を呈する。脱落防止部１３は、孔部１１の下縁部の両端部にスペースを残して中間部から上方へ延設される舌片形状を呈する。 ≪Base part≫
The base portion (rear wall portion) 10 is arranged on the rear side of the pressure generating portion 4 and is a long plate-shaped portion extending in the vertical direction and the horizontal direction (that is, extending in the frontal plane direction). As shown in FIG. 1, the base portion 10 has a bow-shaped shape that is convex forward in a plan view along the bumper beam 2. That is, the base portion 10 has a shape in which the central portion in the vehicle width direction is located at the foremost position and is lowered rearward toward the end portion in the vehicle width direction. As shown in FIG. 3, the base portion 10 has a rectangular hole portion 11, a locking portion 12 extending downward from the upper edge portion of the hole portion 11, and a lower edge of the hole portion 11. A plurality of combinations with the drop-out prevention portion 13 extending upward from the portion are formed in the vehicle width direction. The locking portion 12 has a claw shape that can be locked to the peripheral edge of the hole 44a, which will be described later. The dropout prevention portion 13 has a tongue piece shape extending upward from the intermediate portion, leaving a space at both ends of the lower edge portion of the hole portion 11.

図２に示すように、ベース部１０には、上下一対の突起部１４，１４が複数形成されている。突起部１４は、ベース部１０から後方に突出している。上側の突起部１４は、バンパビーム２の前壁部２ｂに形成された孔部２ｂ１に挿通されている。下側の突起部１４は、バンパビーム２の前壁部２ｆに形成された孔部２ｆ１に挿通されている。上側の突起部１４の上下方向寸法及び対応する孔部２ｂ１の上下方向寸法と、下側の突起部１４の上下方向寸法及び対応する孔部２ｆ１の上下方向寸法と、のうち、少なくとも一方の上下方向寸法の組み合わせは等しい。 As shown in FIG. 2, a plurality of a pair of upper and lower protrusions 14, 14 are formed on the base portion 10. The protrusion 14 projects rearward from the base 10. The upper protrusion 14 is inserted into a hole 2b1 formed in the front wall portion 2b of the bumper beam 2. The lower protrusion 14 is inserted into a hole 2f1 formed in the front wall 2f of the bumper beam 2. At least one of the vertical dimension of the upper protrusion 14 and the vertical dimension of the corresponding hole 2b1 and the vertical dimension of the lower protrusion 14 and the vertical dimension of the corresponding hole 2f1. The combination of directional dimensions is equal.

突起部１４及び孔部２ｂ１（又は孔部２ｆ１）の組み合わせは、バンパビーム２の車幅方向中央部及び車幅方向端部の間に設けられており、エネルギ吸収部材６及びバンパビーム２の上下方向のずれを防止する上下ずれ防止部として機能する。また、突起部１４及び孔部２ｂ１（又は孔部２ｆ１）の組み合わせは、エネルギ吸収部材６がバンパビーム２に組み付けられる際に、エネルギ吸収部材６をバンパビーム２に対して互いに位置決めする位置決め部としても機能する。 The combination of the protrusion 14 and the hole 2b1 (or the hole 2f1) is provided between the central portion of the bumper beam 2 in the vehicle width direction and the end portion in the vehicle width direction, and is provided in the vertical direction of the energy absorbing member 6 and the bumper beam 2. It functions as a vertical displacement prevention unit that prevents displacement. Further, the combination of the protrusion 14 and the hole 2b1 (or the hole 2f1) also functions as a positioning portion for positioning the energy absorbing member 6 with respect to the bumper beam 2 when the energy absorbing member 6 is assembled to the bumper beam 2. do.

本実施形態において、上下ずれ防止部としての突起部１４及び孔部２ｂ１（又は孔部２ｆ１）は、車幅方向端部からバンパビーム２の車幅方向寸法の略1／４の距離となる部位Ｐ（図１参照）に設けられている。かかる位置は、バンパビーム２の中央部に荷重が集中する衝突の場合においても、バンパビーム２が後退しない位置であるため、バンパビーム２とエネルギ吸収部材６との間には、車両前後方向の隙間は発生しない。バンパビーム２及びエネルギ吸収部材６は、部位Ｐの近傍において比較的大きく湾曲している。車両用バンパ１Ｘは、かかる部位Ｐ又は部位Ｐの近傍に上下ずれ防止部を備えることによって、バンパビーム２に対するエネルギ吸収部材６の上下方向のずれを好適に防止し、衝突荷重（エネルギ）を好適に吸収することができる。 In the present embodiment, the protrusion 14 and the hole 2b1 (or the hole 2f1) as the vertical deviation prevention portion are the portions P having a distance of approximately 1/4 of the vehicle width direction dimension of the bumper beam 2 from the vehicle width direction end. (See FIG. 1). Since this position is a position where the bumper beam 2 does not retract even in the case of a collision in which the load is concentrated in the central portion of the bumper beam 2, a gap in the vehicle front-rear direction is generated between the bumper beam 2 and the energy absorbing member 6. do not. The bumper beam 2 and the energy absorbing member 6 are curved relatively large in the vicinity of the portion P. The vehicle bumper 1X is provided with a vertical displacement preventing portion in the portion P or in the vicinity of the portion P, thereby preferably preventing the energy absorbing member 6 from being displaced in the vertical direction with respect to the bumper beam 2, and preferably reducing the collision load (energy). Can be absorbed.

ベース部１０には、上下一対のフランジ部１５，１５が形成されている。上側のフランジ部１５は、ベース部１０の上縁部から後方へ延設されており、バンパビーム２の上壁部２ａの上方に配置されている。下側のフランジ部１５は、ベース部１０の下縁部から後方へ延設されており、バンパビーム２の下壁部２ｇの下方に配置されている。 A pair of upper and lower flange portions 15 and 15 are formed on the base portion 10. The upper flange portion 15 extends rearward from the upper edge portion of the base portion 10 and is arranged above the upper wall portion 2a of the bumper beam 2. The lower flange portion 15 extends rearward from the lower edge portion of the base portion 10 and is arranged below the lower wall portion 2g of the bumper beam 2.

下側のフランジ部１５は、バンパビーム２の車幅方向中央部及び車幅方向端部の間（本実施形態では、少なくとも部位Ｐの近傍）において、バンパビーム２の下面すなわち下壁部２ｇと当接する。このように、フランジ部１５は、エネルギ吸収部材６及びバンパビーム２の上下方向のずれを防止する上下ずれ防止部として機能する。また、フランジ部１５は、ベース部１０を補強する補強部としても機能する。 The lower flange portion 15 comes into contact with the lower surface of the bumper beam 2, that is, the lower wall portion 2g, between the central portion in the vehicle width direction and the end portion in the vehicle width direction of the bumper beam 2 (at least in the vicinity of the portion P in the present embodiment). .. As described above, the flange portion 15 functions as a vertical displacement preventing portion for preventing the energy absorbing member 6 and the bumper beam 2 from being displaced in the vertical direction. The flange portion 15 also functions as a reinforcing portion for reinforcing the base portion 10.

上側のフランジ部１５及びバンパビーム２の上壁部２ａは、バンパビーム２の車幅方向端部と当該端部側の孔部２ｂ１との間において、ボルト締結等によって互いに固定されている。 The upper flange portion 15 and the upper wall portion 2a of the bumper beam 2 are fixed to each other by bolting or the like between the end portion of the bumper beam 2 in the vehicle width direction and the hole portion 2b1 on the end side.

同様に、下側のフランジ部１５及びバンパビーム２の下壁部２ｇは、バンパビーム２の車幅方向端部と当該端部側の孔部２ｆ１との間において、ボルト締結等によって互いに固定されている。 Similarly, the lower flange portion 15 and the lower wall portion 2g of the bumper beam 2 are fixed to each other by bolting or the like between the end portion of the bumper beam 2 in the vehicle width direction and the hole portion 2f1 on the end side. ..

≪圧縮部≫
図２に示すように、圧縮部２０は、圧力発生部４の前側に配置されており、通常時には圧力発生部４を圧縮せず、車両の衝突（前突）時にベース部１０と協働して圧力発生部４を圧縮する部位である。圧縮部２０は、前後方向に延設される延出壁部２１と、延出壁部２１の前端部から下方に延設される前壁部２２と、延出壁部２１の前端部近傍から、前壁部２２と対向するように下方に延設される対向壁部２３と、延出壁部２１の後端部近傍から下方に延設される圧縮壁部２４と、を一体に備える。延出壁部２１は、ベース部１０の車幅方向にわたってベース部１０の同一高さ位置から延出しており、ベース部１０と同様に、平面視で前方に凸状の弓型形状を呈する。すなわち、延出壁部２１は、車幅方向中央部が最も前方に位置し、車幅方向端部に行くにつれて後方に下がる形状を呈する。 ≪Compression part≫
As shown in FIG. 2, the compression unit 20 is arranged on the front side of the pressure generation unit 4, does not normally compress the pressure generation unit 4, and cooperates with the base unit 10 in the event of a vehicle collision (front collision). This is a portion that compresses the pressure generating portion 4. The compression portion 20 is formed from the extension wall portion 21 extending in the front-rear direction, the front wall portion 22 extending downward from the front end portion of the extension wall portion 21, and the vicinity of the front end portion of the extension wall portion 21. The facing wall portion 23 extending downward so as to face the front wall portion 22 and the compression wall portion 24 extending downward from the vicinity of the rear end portion of the extending wall portion 21 are integrally provided. The extending wall portion 21 extends from the same height position of the base portion 10 over the vehicle width direction of the base portion 10, and exhibits a forward-convex bow shape in a plan view like the base portion 10. That is, the extending wall portion 21 has a shape in which the central portion in the vehicle width direction is located at the foremost position and is lowered rearward toward the end portion in the vehicle width direction.

本実施形態において、延出壁部２１は、前方に行くにつれて下方に向かうように傾斜している長板状部である。すなわち、延出壁部２１の前端部（先端部）は、延出壁部２１の後端部（基端部）よりも下方に位置する。つまり、延出壁部２１の先端部は、延出壁部２１の基端部に対して、上下方向のうち圧力発生部４側にオフセットしている。また、延出壁部２１は、側面視で下に凸となるように屈曲形成されている。このように、延出壁部２１は、平面視で前方に凸状の弓型形状を呈するベース部１０から斜め前下方へ延設されているため、延出壁部２１の輪郭（太枠で強調）は、側面視で略平行四辺形状を呈する。 In the present embodiment, the extending wall portion 21 is a long plate-shaped portion that is inclined downward as it goes forward. That is, the front end portion (tip portion) of the extension wall portion 21 is located below the rear end portion (base end portion) of the extension wall portion 21. That is, the tip end portion of the extension wall portion 21 is offset toward the pressure generating portion 4 side in the vertical direction with respect to the base end portion of the extension wall portion 21. Further, the extending wall portion 21 is bent so as to be convex downward in a side view. As described above, since the extending wall portion 21 extends diagonally forward and downward from the base portion 10 which has a bow-shaped shape that is convex forward in a plan view, the outline of the extending wall portion 21 (with a thick frame). (Emphasis) exhibits a substantially parallel quadrilateral shape when viewed from the side.

図２に示すように、前壁部２２には、孔部２２ａが形成されている。孔部２２ａの周縁部には、後記する補強部材４０の係止部４５が係止される。対向壁部２３の長さ（上下方向寸法）は、前壁部２２よりも短く設定されている。かかる対向壁部２３には、後記する補強部材４０の係止部４５が当接する。圧縮壁部２４は、ベース部１０から圧力発生部４の直径だけ離れた位置に設けられている。 As shown in FIG. 2, a hole 22a is formed in the front wall portion 22. A locking portion 45 of the reinforcing member 40, which will be described later, is locked to the peripheral edge portion of the hole portion 22a. The length (vertical dimension) of the facing wall portion 23 is set shorter than that of the front wall portion 22. The locking portion 45 of the reinforcing member 40, which will be described later, comes into contact with the facing wall portion 23. The compression wall portion 24 is provided at a position separated from the base portion 10 by the diameter of the pressure generating portion 4.

≪ヒンジ部≫
ヒンジ部３０は、圧力発生部４の上方において、圧縮部２０の延出壁部２１の後端部（基端部）を、ベース部１０に対して回動可能に連結する。ヒンジ部３０は、ベース部１０から前方に延設される上壁部（第一壁部）３１と、上壁部３１の前端部から下方に延設される前壁部（第二壁部）３２と、を一体に備える。前壁部３２の下端部は、圧縮部２０の延出壁部２１の後端部と連結されている。 ≪Hinge part≫
The hinge portion 30 rotatably connects the rear end portion (base end portion) of the extension wall portion 21 of the compression portion 20 to the base portion 10 above the pressure generating portion 4. The hinge portion 30 includes an upper wall portion (first wall portion) 31 extending forward from the base portion 10 and a front wall portion (second wall portion) extending downward from the front end portion of the upper wall portion 31. 32 and are integrally provided. The lower end of the front wall portion 32 is connected to the rear end portion of the extension wall portion 21 of the compression portion 20.

＜補強部材＞
補強部材４０は、圧縮部２０の延出壁部２１と対向するように設けられており、当該延出壁部２１と協働して圧力発生部４を保持する樹脂製部材（例えばＰＰ（ポリプロピレン）製）である。補強部材４０は、例えば射出成型によって形成されており、圧縮部２０と同様に、衝突検知遅れの無い剛性を有する。補強部材４０は、前後方向に延設される延出壁部４１と、延出壁部４１の後端部から下方に延設される中間片部４２と、中間片部４２の下端部から後方に延設される下片部４３と、下片部４３の後端部から上方に延設される後片部４４と、延出壁部４１の前端部から上方に延設される係止部４５と、を一体に備える。 <Reinforcing member>
The reinforcing member 40 is provided so as to face the extending wall portion 21 of the compression portion 20, and is a resin member (for example, PP (polypropylene)) that holds the pressure generating portion 4 in cooperation with the extending wall portion 21. ) Made). The reinforcing member 40 is formed by, for example, injection molding, and has rigidity without a collision detection delay, like the compression portion 20. The reinforcing member 40 includes an extending wall portion 41 extending in the front-rear direction, an intermediate piece portion 42 extending downward from the rear end portion of the extending wall portion 41, and an intermediate piece portion 42 extending rearward from the lower end portion of the intermediate piece portion 42. The lower piece portion 43 extending upward from the lower piece portion 43, the rear piece portion 44 extending upward from the rear end portion of the lower piece portion 43, and the locking portion extending upward from the front end portion of the extending wall portion 41. 45 and are integrally provided.

中間片部４２及び下片部４３は、延出壁部４１にとってのヒンジ部として、ヒンジ部３０と同様の機能を有する。後片部４４には、矩形状を呈する孔部４４ａが形成されている。孔部４４ａの周縁部には、ベース部１０の係止部１２が係止される。すなわち、補強部材４０は、バンパビーム２の凹部の前側（凹部内）において、ベース部１０の後側に係止される。係止部４５は、孔部２２ａの周縁部に係止可能な爪形状を呈する。 The intermediate piece portion 42 and the lower piece portion 43 have the same functions as the hinge portion 30 as hinge portions for the extending wall portion 41. A rectangular hole 44a is formed in the rear piece 44. The locking portion 12 of the base portion 10 is locked to the peripheral edge portion of the hole portion 44a. That is, the reinforcing member 40 is locked to the rear side of the base portion 10 on the front side (inside the recess) of the recess of the bumper beam 2. The locking portion 45 has a claw shape that can be locked to the peripheral edge of the hole 22a.

≪緩衝部≫
ここで、エネルギ吸収部材６の圧縮部２０及びヒンジ部３０、並びに、補強部材４０は、ベース部１０から車両前後方向外側（ここでは、前側）に延設される緩衝部（プレート部）１Ｚを構成する。緩衝部１Ｚは、車両の衝突時に荷重が入力される部位である。緩衝部１Ｚは、圧縮部２０及び補強部材４０によって上下方向に多層構造（ここでは、二層構造）を呈するとともに、圧縮部２０及び補強部材４０の間に、圧力発生部４が配置される中空部を有する。ここで、中空部は、多層構造における任意の２つの層の間を指す。なお、本実施形態において、緩衝部１Ｚは、ベース部１０から車両前後方向斜め下側に延設されているが、水平方向に延設されてもよく、車両前後方向斜め上側に延設されていてもよい。 ≪Cushioning part≫
Here, the compression portion 20 and the hinge portion 30 of the energy absorbing member 6 and the reinforcing member 40 form a cushioning portion (plate portion) 1Z extending from the base portion 10 to the outside (here, the front side) in the front-rear direction of the vehicle. Constitute. The shock absorber 1Z is a portion where a load is input when a vehicle collides. The buffer portion 1Z has a multi-layer structure (here, a two-layer structure) in the vertical direction by the compression portion 20 and the reinforcing member 40, and the pressure generating portion 4 is arranged between the compression portion 20 and the reinforcing member 40. Has a part. Here, the hollow portion refers between any two layers in a multilayer structure. In the present embodiment, the shock absorber 1Z extends diagonally downward in the vehicle front-rear direction from the base portion 10, but may extend horizontally and extends diagonally upward in the vehicle front-rear direction. You may.

＜傾斜部＞
図１に示すように、バンパビーム２及びエネルギ吸収部材６において、部位Ｐよりも車幅方向外方は、平面視で、車幅方向外方に向かうにつれて後方に傾斜する傾斜部Ｃを構成する。これは、車両前部の外表面を構成するバンパフェース３（図２参照）の車幅方向両端部が、平面視で、車幅方向外方に向かうにつれて後方に傾斜しているためである。以下、傾斜部Ｃにおける構造について説明する。 <Inclined part>
As shown in FIG. 1, in the bumper beam 2 and the energy absorbing member 6, the outside of the portion P in the vehicle width direction constitutes an inclined portion C that inclines rearward toward the outside in the vehicle width direction in a plan view. This is because both ends of the bumper face 3 (see FIG. 2) forming the outer surface of the front part of the vehicle in the vehicle width direction are inclined rearward toward the outside in the vehicle width direction in a plan view. Hereinafter, the structure of the inclined portion C will be described.

≪ボックス形状部≫
圧縮部２０の延出壁部（上壁部）２１は、当該延出壁部２１の上面から上方に突出する左右一対のボックス形状部５０，５０を備える。図４に示すように、ボックス形状部５０は、延出壁部２１から上方に延設される左右一対の側壁部５１，５１と、延出壁部２１から前方に延設されており、左右一対の側壁部５１，５１の上端部を繋ぐ上壁部５２と、を一体に備える。また、ボックス形状部５０は、延出壁部２１から上方に延設されており、側壁部５１，５１及び上壁部５２の前端部を繋ぐ前壁部（受圧部）５３と、前壁部５３から車体前方に突出する複数の受圧リブ５４と、を一体に備える。ボックス形状部５０は、延出壁部２１に形成された矩形状の孔部を上側から塞ぐ筐体形状を呈する。なお、図４において、圧力発生部４及び圧力センサ５は、省略されている。 ≪Box shape part≫
The extension wall portion (upper wall portion) 21 of the compression portion 20 includes a pair of left and right box-shaped portions 50, 50 protruding upward from the upper surface of the extension wall portion 21. As shown in FIG. 4, the box-shaped portion 50 has a pair of left and right side wall portions 51, 51 extending upward from the extending wall portion 21, and extending forward from the extending wall portion 21, and is left and right. An upper wall portion 52 that connects the upper end portions of the pair of side wall portions 51, 51 is integrally provided. Further, the box-shaped portion 50 extends upward from the extending wall portion 21, and has a front wall portion (pressure receiving portion) 53 connecting the side wall portions 51, 51 and the front end portions of the upper wall portion 52, and a front wall portion. A plurality of pressure receiving ribs 54 projecting from 53 to the front of the vehicle body are integrally provided. The box-shaped portion 50 has a housing shape that closes the rectangular hole formed in the extending wall portion 21 from above. In FIG. 4, the pressure generating unit 4 and the pressure sensor 5 are omitted.

上壁部５２は、側面視で略水平方向に延設されており、前壁部５３は、側面視で略鉛直方向に延設されている。すなわち、ボックス形状部５０は、側面視で前上部に略直角となる角を有する略直角三角形状を呈する。前壁部５３は、延出壁部２１の先端部（前端部）よりも若干基端部側（後端部側）に寄って、平面視で傾斜部Ｃの前端部と略平行に（すなわち、車幅方向において傾斜部Ｃに沿って傾斜するように）設けられている。前壁部５３は、傾斜部Ｃの前方において衝突が発生した場合に、前突荷重を受ける受圧部として機能する。 The upper wall portion 52 extends in a substantially horizontal direction in a side view, and the front wall portion 53 extends in a substantially vertical direction in a side view. That is, the box-shaped portion 50 exhibits a substantially right-angled triangular shape having an angle substantially perpendicular to the front upper portion when viewed from the side. The front wall portion 53 is slightly closer to the base end portion side (rear end portion side) than the tip end portion (front end portion) of the extending wall portion 21, and is substantially parallel to the front end portion of the inclined portion C in a plan view (that is,. , So as to incline along the inclined portion C in the vehicle width direction). The front wall portion 53 functions as a pressure receiving portion that receives a front impact load when a collision occurs in front of the inclined portion C.

受圧リブ５４は、上下方向に延設されている。受圧リブ５３の先端部は、車両前後方向において延出壁部２１の先端部と同じ位置に設けられている。複数の受圧リブ５３は、車幅方向に配列されている。受圧リブ５４の上端部は、側面視でＲ形状を呈する。かかる構成によると、車両に衝突が発生してボックス形状部５０が下方に回動した場合に、受圧リブ５４に続いて上壁部５２が前突荷重を好適に受けることができる。また、平面視で孔部２２ａと重なる部位には、受圧リブ５４は設けられていない。これは、圧縮部２０の成形時における金型の抜きを考慮したためである。 The pressure receiving rib 54 extends in the vertical direction. The tip of the pressure receiving rib 53 is provided at the same position as the tip of the extending wall portion 21 in the front-rear direction of the vehicle. The plurality of pressure receiving ribs 53 are arranged in the vehicle width direction. The upper end of the pressure receiving rib 54 has an R shape when viewed from the side. According to such a configuration, when a collision occurs in the vehicle and the box-shaped portion 50 rotates downward, the upper wall portion 52 can preferably receive the front impact load following the pressure receiving rib 54. Further, the pressure receiving rib 54 is not provided at the portion overlapping the hole portion 22a in a plan view. This is because the die removal at the time of molding the compression unit 20 is taken into consideration.

≪リブ≫
図５に示すように、補強部材４０の延出壁部（下壁部）４１は、当該延出壁部４１の下面から下方に突出する複数のリブ６０を備える。リブ６０は、側面視で後下部に直角に近い鈍角の角を有する略三角形状を呈する。リブ６０は、前後方向に沿うように延設されている。より詳細には、リブ６０は、平面視で、傾斜部Ｃの傾斜方向に略直交する方向に延設されている。リブ６０の後端部は、ベース部１０と角度θを空けて離間している。複数のリブ６０は、車幅方向に配列されている。複数のリブ６０は、傾斜部Ｃの前方において衝突が発生した場合に、ベース部１０と当接することによって圧縮部２０の延出壁部４１及び補強部材４０の延出壁部４１の回動変形の角度を規制する角度規制部として機能する。 ≪Rib≫
As shown in FIG. 5, the extending wall portion (lower wall portion) 41 of the reinforcing member 40 includes a plurality of ribs 60 projecting downward from the lower surface of the extending wall portion 41. The rib 60 exhibits a substantially triangular shape having an obtuse angle close to a right angle at the rear lower portion in a lateral view. The rib 60 is extended along the front-rear direction. More specifically, the rib 60 extends in a direction substantially orthogonal to the inclination direction of the inclined portion C in a plan view. The rear end portion of the rib 60 is separated from the base portion 10 at an angle θ. The plurality of ribs 60 are arranged in the vehicle width direction. When a collision occurs in front of the inclined portion C, the plurality of ribs 60 come into contact with the base portion 10 to rotate and deform the extending wall portion 41 of the compression portion 20 and the extending wall portion 41 of the reinforcing member 40. It functions as an angle control unit that regulates the angle of.

図１に示すように、圧縮部２０の前壁部２２は、当該前壁部２２から車体前方（車体から離間する方向）に突出する左右一対の凸部７０，７０を備える。図４に示すように、凸部７０は、前壁部２２から前方に延設される左右一対の側壁部７１，７１と、前壁部２２から前方に延設されており、左右一対の側壁部７１，７１の上端部を繋ぐ上壁部７２と、を一体に備える。また、ボックス形状部５０は、側壁部７１，７１及び上壁部７２の前端部を繋ぐ前壁部７３を一体に備える。凸部７０は、前壁部２２に形成された矩形状の切欠部を前側から塞ぐとともに下側に開口を有する筐体形状を呈する。凸部７０の先端部は、平面視で傾斜部Ｃの前端部と略平行であり（車幅方向において傾斜部Ｃに沿って傾斜しており）、ボックス形状部５０の受圧リブ５４よりも前方に位置する。凸部７０は、傾斜部Ｃにおいて、左右一対のボックス形状部５０よりも車幅方向内方に設けられている。左右一対の凸部７０は、車両に衝突が発生した場合に、前突荷重を先行的に受けるとともに、傾斜部Ｃの前方において衝突が発生した場合に、前突荷重をボックス形状５０とともに受けることができる。また、上壁部７２及び前壁部７３の間に構成される角部は、側面視でＲ形状を呈する。かかる構成によると、車両に衝突が発生して凸部７０が下方に回動した場合に、前壁部７３に続いて上壁部７２が前突荷重を好適に受けることができる。凸部７０の先端部（の一部又は全体）は、傾斜部Ｃではない車幅方向中間部における前壁部２２よりも前方に位置してもよく、後方に位置してもよい。 As shown in FIG. 1, the front wall portion 22 of the compression portion 20 includes a pair of left and right convex portions 70, 70 protruding from the front wall portion 22 in the front direction of the vehicle body (direction away from the vehicle body). As shown in FIG. 4, the convex portion 70 has a pair of left and right side wall portions 71, 71 extending forward from the front wall portion 22, and a pair of left and right side walls extending forward from the front wall portion 22. An upper wall portion 72 connecting the upper ends of the portions 71 and 71 is integrally provided. Further, the box-shaped portion 50 integrally includes a front wall portion 73 that connects the side wall portions 71, 71 and the front end portions of the upper wall portion 72. The convex portion 70 has a housing shape in which a rectangular notch formed in the front wall portion 22 is closed from the front side and an opening is provided on the lower side. The tip of the convex portion 70 is substantially parallel to the front end portion of the inclined portion C in a plan view (inclined along the inclined portion C in the vehicle width direction), and is in front of the pressure receiving rib 54 of the box-shaped portion 50. Located in. The convex portion 70 is provided on the inclined portion C inward in the vehicle width direction with respect to the pair of left and right box-shaped portions 50. The pair of left and right convex portions 70 receive a front collision load in advance when a collision occurs in the vehicle, and also receive a front collision load together with the box shape 50 when a collision occurs in front of the inclined portion C. Can be done. Further, the corner portion formed between the upper wall portion 72 and the front wall portion 73 exhibits an R shape in a side view. According to such a configuration, when a collision occurs in the vehicle and the convex portion 70 rotates downward, the upper wall portion 72 following the front wall portion 73 can suitably receive the front collision load. The tip portion (a part or the whole) of the convex portion 70 may be located in front of or behind the front wall portion 22 in the vehicle width direction intermediate portion that is not the inclined portion C.

≪爪部≫
図１に示すように、ベース部１０は、車幅方向両端部に上下一対の爪部８０，８０をそれぞれ備える。図４に示すように、爪部８０は、ベース部１０の車幅方向端部から後方に延設されている。爪部８０は、ベース部１０の車幅方向端部から後方に延設される片部８１と、片部８１の後端部から車幅方向内方に延設される突起部８２と、を一体に備える。片部８１は、車幅方向に弾性変形可能である。上の爪部８０は、バンパビーム２の前壁部２ｂに対して車幅方向外側から係止されており、下の爪部８０は、バンパビーム２の前壁部２ｆに対して車幅方向外側から係止されている。爪部８０は、バンパビーム２の車幅方向端部に対して車幅方向端部から後方に回り込み、突起部８２がベース部１０と協働することによって、バンパビーム２の車幅方向端部を前後方向から挟持する。また、左右一対の爪部８０，８０の片部８１，８１は、バンパビーム２を車幅方向両端部から挟持する。車幅方向両端部の爪部８０は、かかる係止手法によって、ベース部１０がバンパビーム２に対して前後方向及び車幅方向にずれることを防止する。 ≪Nail part≫
As shown in FIG. 1, the base portion 10 includes a pair of upper and lower claw portions 80, 80 at both ends in the vehicle width direction, respectively. As shown in FIG. 4, the claw portion 80 extends rearward from the end portion of the base portion 10 in the vehicle width direction. The claw portion 80 includes a single portion 81 extending rearward from the end portion of the base portion 10 in the vehicle width direction, and a protruding portion 82 extending inward in the vehicle width direction from the rear end portion of the single portion 81. Prepare for one. The piece 81 is elastically deformable in the vehicle width direction. The upper claw portion 80 is locked to the front wall portion 2b of the bumper beam 2 from the outside in the vehicle width direction, and the lower claw portion 80 is locked to the front wall portion 2f of the bumper beam 2 from the outside in the vehicle width direction. It is locked. The claw portion 80 wraps around the end portion in the vehicle width direction of the bumper beam 2 from the end portion in the vehicle width direction to the rear, and the protrusion 82 cooperates with the base portion 10 to move the end portion in the vehicle width direction of the bumper beam 2 back and forth. Hold from the direction. Further, the pair of left and right claws 80, 80, one piece 81, 81, sandwiches the bumper beam 2 from both ends in the vehicle width direction. The claw portions 80 at both ends in the vehicle width direction prevent the base portion 10 from shifting in the front-rear direction and the vehicle width direction with respect to the bumper beam 2 by such a locking method.

＜補強部材のエネルギ吸収部材への組付＞
作業者は、エネルギ吸収部材６のベース部１０と圧縮壁部２４との間に圧力発生部４を配置した状態で、補強部材４０をエネルギ吸収部材６へ組み付ける。ここで、作業者は、補強部材４０の後片部４４をベース部１０の孔部１１に前方から挿入し、ベース部１０の係止部１２を後片部４４の孔部４４ａに係止させる。同様に、作業者は、補強部材４０の係止部４５を対向壁部２３に当接させるとともに前壁部２２の孔部２２ａに係止させる。 <Assembly of reinforcing member to energy absorbing member>
The operator assembles the reinforcing member 40 to the energy absorbing member 6 with the pressure generating portion 4 arranged between the base portion 10 of the energy absorbing member 6 and the compression wall portion 24. Here, the operator inserts the rear piece 44 of the reinforcing member 40 into the hole 11 of the base 10 from the front, and locks the locking portion 12 of the base 10 into the hole 44a of the rear piece 44. .. Similarly, the operator brings the locking portion 45 of the reinforcing member 40 into contact with the facing wall portion 23 and locks the locking portion 45 with the hole portion 22a of the front wall portion 22.

ここで、後片部４４が孔部１１に挿入される際には、脱落防止部１３は、後方へ避けるように弾性変形し、後片部４４の孔部１１への挿入を許容する。一方、係止部１２が孔部４４ａに係止された後には、脱落防止部１３は、後片部４４のベース部１０からの脱落を防止する。 Here, when the rear piece portion 44 is inserted into the hole portion 11, the dropout prevention portion 13 is elastically deformed so as to avoid rearward, and the rear piece portion 44 is allowed to be inserted into the hole portion 11. On the other hand, after the locking portion 12 is locked in the hole portion 44a, the dropout prevention portion 13 prevents the rear piece portion 44 from falling off from the base portion 10.

＜エネルギ吸収部材及び補強部材のバンパビームへの組付＞
続いて、作業者は、圧力発生部４、エネルギ吸収部材６及び補強部材４０の組立体を、バンパビーム２へ組み付ける。ここで、作業者は、エネルギ吸収部材６の爪部８０を、バンパビーム２の車幅方向両端部に車幅方向外側から係止させる。また、作業者は、エネルギ吸収部材６の突起部１４をバンパビーム２の孔部２ｂ１，２ｆ１に挿通させることによって、バンパビーム２に対するエネルギ吸収部材６の位置決めを行う。続いて、作業者は、位置決めされたバンパビーム２及びエネルギ吸収部材６を、ボルト締結等によって互いに固定させる。 <Assembly of energy absorbing member and reinforcing member to bumper beam>
Subsequently, the operator assembles the assembly of the pressure generating portion 4, the energy absorbing member 6, and the reinforcing member 40 to the bumper beam 2. Here, the operator locks the claws 80 of the energy absorbing member 6 to both ends of the bumper beam 2 in the vehicle width direction from the outside in the vehicle width direction. Further, the operator positions the energy absorbing member 6 with respect to the bumper beam 2 by inserting the protrusion 14 of the energy absorbing member 6 into the holes 2b1 and 2f1 of the bumper beam 2. Subsequently, the operator fixes the positioned bumper beam 2 and the energy absorbing member 6 to each other by bolting or the like.

＜衝突時における圧力発生部の圧縮＞
図２に示すように、車両の衝突（前突）時には、前突荷重Ｆは、圧縮部２０の延出壁部２１に対して、ヒンジ部３０（特に、上壁部３１と前壁部３２との連結部位）を軸として下方へ回動するモーメントＭとして作用する。同様に、前突荷重Ｆは、補強部材４０の延出壁部４１に対して、延出壁部４１の基端部（延出壁部４１と中間片部４２との連結部位）を軸として下方へ回動するモーメントＭとして作用する。かかるモーメントＭによって、圧縮部２０の圧縮壁部２４は、ベース部１０との間に圧力発生部４を挟み込み、圧力発生部４を後方へ潰すように圧縮する。また、側面視で略平行四辺形状の輪郭を有する延出壁部４１は、前突荷重Ｆによって面外変形を生じる。 <Compression of pressure generating part at the time of collision>
As shown in FIG. 2, at the time of a vehicle collision (front collision), the front collision load F is applied to the hinge portion 30 (particularly, the upper wall portion 31 and the front wall portion 32) with respect to the extending wall portion 21 of the compression portion 20. It acts as a moment M that rotates downward around the connection site). Similarly, the front thrust load F is about the base end portion (the connecting portion between the extending wall portion 41 and the intermediate piece portion 42) of the extending wall portion 41 with respect to the extending wall portion 41 of the reinforcing member 40. It acts as a downwardly rotating moment M. By such a moment M, the compression wall portion 24 of the compression portion 20 sandwiches the pressure generating portion 4 with the base portion 10 and compresses the pressure generating portion 4 so as to crush it rearward. Further, the extending wall portion 41 having a substantially parallel quadrilateral contour when viewed from the side surface undergoes out-of-plane deformation due to the front impact load F.

また、車両の傾斜部Ｃの前方における衝突（微小ラップ衝突）時には、前突荷重は、図５に示すボックス形状部５０及び凸部７０を介して、圧縮部２０の延出壁部２１及び補強部材４０の延出壁部４１に入力される。したがって、前突荷重が車幅方向外方に滑るように逃げずに延出壁部２１，４１を下方へ回動させ、圧縮部２０の圧縮壁部２４は、ベース部１０との間に圧力発生部４を挟み込み、圧力発生部４を後方へ潰すように圧縮する。かかる構成によると、傾斜部Ｃの前方において衝突が発生した場合においても、延出壁部２１，４１の回動によって前突荷重を好適に吸収することができるとともに、圧力発生部４の潰れによって衝突を好適に検知することができる。 Further, at the time of a collision (small lap collision) in front of the inclined portion C of the vehicle, the front collision load is applied to the extending wall portion 21 and the reinforcing portion 20 of the compression portion 20 via the box-shaped portion 50 and the convex portion 70 shown in FIG. It is input to the extending wall portion 41 of the member 40. Therefore, the extension wall portions 21 and 41 are rotated downward without escaping so that the front impact load slides outward in the vehicle width direction, and the compression wall portion 24 of the compression portion 20 is pressed against the base portion 10. The generating portion 4 is sandwiched and the pressure generating portion 4 is compressed so as to be crushed rearward. According to such a configuration, even when a collision occurs in front of the inclined portion C, the front collision load can be suitably absorbed by the rotation of the extending wall portions 21 and 41, and the pressure generating portion 4 is crushed. The collision can be suitably detected.

本発明の実施形態に係る衝撃緩和構造体１Ｙは、車幅方向に延在するとともに、車両のバンパビーム２の前側に設けられるベース部１０と、車幅方向に延在するとともに、前記ベース部１０から車体前方に延設されるプレート部（緩衝部１Ｚ）と、を備え、前記ベース部１０及び前記プレート部は、車幅方向中央から車幅方向外方にずれた位置に、平面視で車幅方向外方に向かうにつれて後方に傾斜する傾斜部Ｃを有し、前記プレート部は、前記傾斜部Ｃにおいて上面又は下面から突出するボックス形状部５０を有し、前記ボックス形状部５０の前端部は、前記傾斜部Ｃと略平行な受圧部（前壁部５３）であることを特徴とする。
したがって、衝撃緩和構造体１Ｙは、ボックス形状部５０が前突荷重を受けるので、傾斜部Ｃにおいて衝撃緩和を好適に行うことができる。 The impact mitigation structure 1Y according to the embodiment of the present invention extends in the vehicle width direction, extends in the vehicle width direction with a base portion 10 provided on the front side of the bumper beam 2 of the vehicle, and extends in the vehicle width direction. A plate portion (buffer portion 1Z) extending from the front of the vehicle body is provided, and the base portion 10 and the plate portion are located at positions deviated from the center in the vehicle width direction to the outside in the vehicle width direction in a plan view. The plate portion has an inclined portion C that inclines rearward as it goes outward in the width direction, and the plate portion has a box-shaped portion 50 that protrudes from the upper surface or the lower surface of the inclined portion C, and is a front end portion of the box-shaped portion 50. Is a pressure receiving portion (front wall portion 53) substantially parallel to the inclined portion C.
Therefore, in the impact mitigation structure 1Y, since the box-shaped portion 50 receives the front impact load, the impact mitigation can be suitably performed at the inclined portion C.

また、衝撃緩和構造体１Ｙは、前記プレート部が、前記傾斜部Ｃにおいて前記ボックス形状部５０と反対側の面から突出するリブ６０を有し、前記リブ６０は、前後方向に沿うように延設されており、前記ベース部１０とは離間していることを特徴とする。
したがって、衝撃緩和構造体１Ｙは、リブ６０によってボックス形状部５０の強度及び剛性を向上するとともに、リブ６０及びベース部１０の間に隙間が無い場合と比較して、前突荷重によるモーメントをプレート部に対して好適に作用させることができる。 Further, in the impact mitigation structure 1Y, the plate portion has a rib 60 projecting from a surface opposite to the box-shaped portion 50 in the inclined portion C, and the rib 60 extends along the front-rear direction. It is provided and is characterized in that it is separated from the base portion 10.
Therefore, the impact mitigation structure 1Y improves the strength and rigidity of the box-shaped portion 50 by the rib 60, and plates the moment due to the front impact load as compared with the case where there is no gap between the rib 60 and the base portion 10. It can be suitably acted on the portion.

また、衝撃緩和構造体１Ｙは、前記受圧部から車体前方に突出する受圧リブ５４を有することを特徴とする。
したがって、衝撃緩和構造体１Ｙは、受圧部の強度及び剛性を向上し、前突荷重によるモーメントをプレート部に対して好適に作用させることができる。 Further, the impact mitigation structure 1Y is characterized by having a pressure receiving rib 54 projecting from the pressure receiving portion to the front of the vehicle body.
Therefore, the impact mitigation structure 1Y can improve the strength and rigidity of the pressure receiving portion, and the moment due to the front impact load can be suitably applied to the plate portion.

また、衝撃緩和構造体１Ｙは、前記プレート部が、上壁部（延出壁部２１）及び下壁（延出壁部４１）部を有し、前記上壁部及び前記下壁部の間に設けられる圧力発生部４を備えることを特徴とする。
したがって、衝撃緩和構造体１Ｙは、上壁部及び下壁部によって衝撃吸収量を増大し、前突荷重によるモーメントをプレート部に対して好適に作用させるとともに、圧力発生部４において圧力を好適に発生し、当該圧力を衝突検知に用いることができる。 Further, in the impact mitigation structure 1Y, the plate portion has an upper wall portion (extended wall portion 21) and a lower wall portion (extended wall portion 41), and is between the upper wall portion and the lower wall portion. It is characterized in that the pressure generating portion 4 provided in the above is provided.
Therefore, in the impact mitigation structure 1Y, the amount of impact absorption is increased by the upper wall portion and the lower wall portion, the moment due to the front collision load is appropriately applied to the plate portion, and the pressure is preferably applied in the pressure generating portion 4. It is generated and the pressure can be used for collision detection.

また、衝撃緩和構造体１Ｙは、前記プレート部が、前記ボックス形状部５０よりも車体前方に突出する凸部７０を有し、前記凸部７０は、前記傾斜部Ｃにおいて、前記ボックス形状部５０よりも車幅方向内方に設けられていることを特徴とする。
したがって、衝撃緩和構造体１Ｙは、凸部７０によって前突荷重をプレート部に速やかに伝達することができるとともに、傾斜部Ｃの前方で衝突が発生した場合には、前突荷重を凸部７０及びボックス形状部５０の両方で好適に受けることができる。 Further, the impact mitigation structure 1Y has a convex portion 70 in which the plate portion projects forward of the vehicle body from the box-shaped portion 50, and the convex portion 70 is the box-shaped portion 50 in the inclined portion C. It is characterized in that it is provided inward in the vehicle width direction.
Therefore, the impact mitigation structure 1Y can quickly transmit the front impact load to the plate portion by the convex portion 70, and when a collision occurs in front of the inclined portion C, the front impact load is transferred to the convex portion 70. It can be suitably received by both the box-shaped portion 50 and the box-shaped portion 50.

また、衝撃緩和構造体１Ｙは、前記ベース部１０は、車両のバンパビーム２の車幅方向両端部に対して当該バンパビーム２の車幅方向外側から係止される爪部８０を有することを特徴とする。
したがって、衝撃緩和構造体１Ｙは、前突荷重によってベース部１０及びプレート部が上下方向におけるプレート部の傾斜の反対方向に移動することを防止し、前突荷重によってプレート部を回動方向に好適に変形させ、衝撃吸収を好適に行うことができる。 Further, the impact mitigation structure 1Y is characterized in that the base portion 10 has claw portions 80 that are locked to both ends of the bumper beam 2 of the vehicle in the vehicle width direction from the outside in the vehicle width direction of the bumper beam 2. do.
Therefore, the impact mitigation structure 1Y prevents the base portion 10 and the plate portion from moving in the direction opposite to the inclination of the plate portion in the vertical direction due to the front impact load, and is suitable for rotating the plate portion in the rotation direction due to the front impact load. It can be deformed to and shock absorption can be preferably performed.

以上、本発明の実施形態について詳細に説明したが、本発明は前記実施形態に限定されず、本発明の要旨を逸脱しない範囲で適宜変更可能である。例えば、衝撃緩和構造体１Ｙは、上下反転した構造であってもよい。この場合、延出壁部２１，４１は、前方に向かうにつれて上方にいくように傾斜する。また、ボックス形状部５０は、下壁部となる延出壁部２１から下方に突出し、リブ６０は、上壁部となる延出壁部４１から上方に突出する。すなわち、延出壁部２１，４１が、前方に行くにつれて下方に向かうように傾斜している場合には、ボックス形状部５０は、上側の延出壁部２１の上面から上方に突出し、リブ６０は、下側の延出壁部４１の下面から下方に突出する。また、延出壁部２１，４１が、前方に行くにつれて上方に向かうように傾斜している場合には、ボックス形状部５０は、下側の延出壁部２１の下面から下方に突出し、リブ６０は、上側の延出壁部４１の上面から上方に突出する。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the gist of the present invention. For example, the impact mitigation structure 1Y may have an upside down structure. In this case, the extending wall portions 21, 41 are inclined so as to go upward toward the front. Further, the box-shaped portion 50 projects downward from the extending wall portion 21 that serves as the lower wall portion, and the rib 60 projects upward from the extending wall portion 41 that serves as the upper wall portion. That is, when the extending wall portions 21 and 41 are inclined downward as they go forward, the box-shaped portion 50 projects upward from the upper surface of the upper extending wall portion 21 and the rib 60 Projects downward from the lower surface of the lower extending wall portion 41. Further, when the extending wall portions 21 and 41 are inclined upward as they go forward, the box-shaped portion 50 projects downward from the lower surface of the lower extending wall portion 21 and is ribbed. 60 projects upward from the upper surface of the upper extending wall portion 41.

１Ｘ車両用バンパ
１Ｙ衝撃緩和構造体
１Ｚ緩衝部（プレート部）
２バンパビーム
３バンパフェース
４圧力発生部（衝撃緩和構造体）
６エネルギ吸収部材（衝撃緩和構造体）
１０ベース部
２０圧縮部（緩衝部）
２１延出壁部（上壁部）
４０補強部材（緩衝部）
４１延出壁部（下壁部）
５０ボックス形状部
５３前壁部（受圧部）
５４受圧リブ
６０リブ
７０凸部
８０爪部 1X Vehicle bumper 1Y Impact mitigation structure 1Z Buffer (plate)
2 Bumper beam 3 Bumper face 4 Pressure generating part (impact mitigation structure)
6 Energy absorbing member (impact mitigation structure)
10 Base part 20 Compression part (buffer part)
21 Extended wall part (upper wall part)
40 Reinforcing member (buffer)
41 Extended wall part (lower wall part)
50 Box-shaped part 53 Front wall part (pressure receiving part)
54 Pressure receiving rib 60 Rib 70 Convex part 80 Claw part

Claims

In addition to extending in the vehicle width direction, the base part provided on the front side of the bumper beam of the vehicle and
A plate portion that extends in the vehicle width direction and extends from the base portion to the front of the vehicle body,
With
The base portion and the plate portion have an inclined portion that is inclined rearward as it goes outward in the vehicle width direction in a plan view at a position deviated from the center in the vehicle width direction to the outside in the vehicle width direction.
The plate portion has a box-shaped portion that protrudes from the upper surface or the lower surface at the inclined portion.
An impact mitigation structure characterized in that the front end portion of the box-shaped portion is a pressure receiving portion substantially parallel to the inclined portion.

The plate portion has ribs protruding from a surface opposite to the box-shaped portion at the inclined portion.
The impact mitigation structure according to claim 1, wherein the ribs are extended along the front-rear direction and are separated from the base portion.

The impact mitigation structure according to claim 1, further comprising a pressure receiving rib projecting from the pressure receiving portion to the front of the vehicle body.

The plate portion has an upper wall portion and a lower wall portion.
The impact mitigation structure according to claim 1, further comprising a pressure generating portion provided between the upper wall portion and the lower wall portion.

The plate portion has a convex portion that protrudes forward of the vehicle body from the box-shaped portion.
The impact mitigation structure according to claim 1, wherein the convex portion is provided in the inclined portion inward in the vehicle width direction with respect to the box-shaped portion.

The impact mitigation structure according to claim 1, wherein the base portion has claw portions that are locked to both ends of the bumper beam of the vehicle in the vehicle width direction from the outside in the vehicle width direction of the bumper beam.