JP7111590B2

JP7111590B2 - Shock absorption mechanism

Info

Publication number: JP7111590B2
Application number: JP2018220163A
Authority: JP
Inventors: 豪軌杉浦; 義輝水谷; 寿久三浦; 拓也西村
Original assignee: Toyota Auto Body Co Ltd; Toyota Central R&D Labs Inc
Current assignee: Toyota Auto Body Co Ltd; Toyota Central R&D Labs Inc
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2022-08-02
Anticipated expiration: 2038-11-26
Also published as: JP2020085126A

Description

本発明は、車両に加わる衝撃を吸収する衝撃吸収機構に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact absorbing mechanism that absorbs impact applied to a vehicle.

車両の衝突時の衝突荷重を受けてその衝撃を吸収できるように構成された衝撃吸収機構に関する技術が、特許文献１、２に記載されている。 Patent Documents 1 and 2 describe techniques related to an impact absorbing mechanism configured to receive a collision load at the time of a vehicle collision and absorb the impact.

特許文献１、２には、車両前方衝突時にバンパーリインフォースがサイドメンバ側に押された際に、バンパーリインフォースとサイドメンバの間に設けた木材がボルト等の連結材に押されて圧縮するかまたはせん断が生じることで衝撃が吸収される衝撃吸収機構について記載されている。 In Patent Documents 1 and 2, when the bumper reinforcement is pushed toward the side member at the time of a frontal collision of the vehicle, the wood provided between the bumper reinforcement and the side member is pushed by a connecting member such as a bolt and compressed or A shock absorbing mechanism is described in which shock is absorbed by shearing.

国際公開第2014/077314号WO2014/077314 特開2017-7598号公報Japanese Patent Application Laid-Open No. 2017-7598

本発明者は、上記のような衝撃吸収機構の性能向上に向けて各種の新規な構成を鋭意検討している。ただし、衝撃吸収機構で重要な点は連結材が受ける衝突荷重が衝突過程において安定し、意図した衝撃吸収がなされることであり、衝撃吸収機構の性能向上のための構成と言えども、安定した衝撃吸収を阻害しない形で実現される必要がある。 The inventor of the present invention is earnestly studying various new configurations to improve the performance of the impact absorbing mechanism as described above. However, the important point in the impact absorption mechanism is that the impact load received by the connecting member is stabilized during the collision process, and the intended impact is absorbed. It must be realized in a form that does not hinder shock absorption.

本発明は前述した問題点に鑑みてなされたものであり、好適に衝撃吸収を行うことのできる衝撃吸収機構を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a shock absorbing mechanism capable of suitably absorbing shock.

前述した目的を達成するための第１の発明は、車両に加わる衝突荷重を軽減するための衝撃吸収機構であって、衝突荷重を受ける荷重受け部材と前記衝突荷重が前記荷重受け部材から伝達される被伝達部材の間に設けられ、部材軸方向の一方の端部が前記荷重受け部材と前記被伝達部材のうち一方の部材の内部空間に挿入された木製の柱状の衝撃吸収材と、前記一方の部材に連結された第１の連結材と、を具備し、衝突時に前記第１の連結材が前記衝撃吸収材の前記一方の端部の端面の一部を押圧し、前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第１の連結材に沿った方向の第１の切込みが設けられ、前記第１の連結材は、前記荷重受け部材と前記被伝達部材のうち他方の部材に面した凸部を有し、前記第１の切込みが、前記衝撃吸収材の部材軸方向から見た時に前記凸部と重なる位置で形成されたことを特徴とする衝撃吸収機構である。
第２の発明は、車両に加わる衝突荷重を軽減するための衝撃吸収機構であって、衝突荷重を受ける荷重受け部材と前記衝突荷重が前記荷重受け部材から伝達される被伝達部材の間に設けられ、部材軸方向の一方の端部が前記荷重受け部材と前記被伝達部材のうち一方の部材の内部空間に挿入された木製の柱状の衝撃吸収材と、前記一方の部材に連結された第１の連結材と、を具備し、衝突時に前記第１の連結材が前記衝撃吸収材の前記一方の端部の端面の一部を押圧し、前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第１の連結材に沿った方向の第１の切込みが設けられ、前記第１の連結材は、前記荷重受け部材と前記被伝達部材のうち他方の部材に面した平面部または凹面部を有し、前記第１の切込みが、前記平面部または凹面部の両側に当たる位置で形成されたことを特徴とする衝撃吸収機構である。
第３の発明は、車両に加わる衝突荷重を軽減するための衝撃吸収機構であって、衝突荷重を受ける荷重受け部材と前記衝突荷重が前記荷重受け部材から伝達される被伝達部材の間に設けられ、部材軸方向の一方の端部が前記荷重受け部材と前記被伝達部材のうち一方の部材の内部空間に挿入された木製の柱状の衝撃吸収材と、前記一方の部材に連結された第１の連結材と、を具備し、衝突時に前記第１の連結材が前記衝撃吸収材の前記一方の端部の端面の一部を押圧し、前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第１の連結材に沿った方向の第１の切込みが設けられ、前記衝撃吸収材の部材軸方向の他方の端部は、前記荷重受け部材と前記被伝達部材のうち他方の部材の内部空間に挿入され、前記他方の部材に連結された第２の連結材を更に具備し、衝突時に前記第２の連結材が前記衝撃吸収材の前記他方の端部の端面の一部を押圧し、前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第２の連結材に沿った方向の第２の切込みが設けられ、前記第１、第２の連結材は、前記衝撃吸収材の部材軸方向から見た時に異なる位置に配置され、前記第１、第２の切込みは、前記衝撃吸収材の部材軸方向から見た時に前記第１、第２の連結材の間に設けられることを特徴とする衝撃吸収機構である。 A first invention for achieving the above object is a shock absorbing mechanism for reducing a collision load applied to a vehicle, comprising a load receiving member for receiving the collision load and a shock absorber for transmitting the collision load from the load receiving member. a wooden column-shaped shock absorbing member provided between the transmitted members and having one end in the axial direction of the member inserted into the internal space of one of the load receiving member and the transmitted member; and a first connecting member connected to one of the members, wherein the first connecting member presses a part of the end surface of the one end of the shock absorbing member at the time of collision, and the shock absorbing member The end face of the load receiving member and the transmitted member are provided with a first notch in the direction along the first connecting member in the covering of the end face. A shock absorbing mechanism having a convex portion facing the other member, wherein the first cut is formed at a position overlapping the convex portion when viewed from the axial direction of the member of the shock absorbing material. be.
A second invention is an impact absorbing mechanism for reducing a collision load applied to a vehicle, which is provided between a load receiving member that receives the collision load and a member to which the collision load is transmitted from the load receiving member. a wooden column-shaped shock absorbing member having one end in the member axial direction inserted into the internal space of one of the load receiving member and the transmitted member; 1 connecting member, wherein the first connecting member presses a part of the end surface of the one end of the shock absorbing member at the time of collision, the end surface of the shock absorbing member is covered, and the A first cut is provided in the covering of the end face in a direction along the first connecting member, and the first connecting member is a flat portion facing the other of the load receiving member and the transmitted member. Alternatively, the impact absorbing mechanism has a concave surface portion, and the first cuts are formed at positions corresponding to both sides of the flat surface portion or the concave surface portion.
A third aspect of the invention is a shock absorbing mechanism for reducing a collision load applied to a vehicle, which is provided between a load receiving member that receives the collision load and a member to which the collision load is transmitted from the load receiving member. a wooden column-shaped shock absorbing member having one end in the member axial direction inserted into the internal space of one of the load receiving member and the transmitted member; 1 connecting member, wherein the first connecting member presses a part of the end surface of the one end of the shock absorbing member at the time of collision, the end surface of the shock absorbing member is covered, and the A first notch is provided in the covering of the end face in a direction along the first connecting member, and the other end of the shock absorbing member in the axial direction of the member is connected to the other of the load receiving member and the transmitted member. and further comprising a second connecting member inserted into the inner space of the member and connected to the other member, wherein the second connecting member is positioned on one end surface of the other end of the impact absorbing member in the event of a collision. The end surface of the shock absorbing material is covered, the coating of the end surface is provided with a second cut in the direction along the second connecting member, and the first and second connecting members are , arranged at different positions when viewed from the axial direction of the member of the impact absorbing material, and the first and second cuts are located at the same positions as the first and second connecting members when viewed from the axial direction of the member of the impact absorbing material. It is a shock absorbing mechanism characterized by being provided between.

本発明の衝撃吸収機構は、木材（衝撃吸収材）を被覆して保護し劣化を防ぐという構成を有するが、衝突時、連結材によって押圧されない木材部分はせん断変形して上記の内部空間に進入するので、単に衝撃吸収材を被覆するというだけでは、衝撃吸収材の端面の被覆が上記木材部分に引張られて連結材に加わる荷重を不安定とする要因となり、意図した衝撃吸収がなされない恐れがある。そこで、本発明では端面の被覆に上記の切込みを設けることで衝突時に被覆が早期に破断するようにし、連結材が受ける荷重が不安定になるのを防いで意図した衝撃吸収を実現することが可能になる。 The shock absorbing mechanism of the present invention has a configuration in which the wood (shock absorbing material) is covered to protect it and prevent deterioration, but in the event of a collision, the wood portion that is not pressed by the connecting member undergoes shear deformation and enters the internal space. Therefore, simply covering the shock absorbing material may cause the end face covering of the shock absorbing material to be pulled by the wooden portion, making the load applied to the connecting member unstable, and the intended shock absorption may not be achieved. There is Therefore, in the present invention, by providing the above cuts in the covering of the end face, the covering can be broken at an early stage at the time of collision, preventing the load received by the connecting member from becoming unstable and realizing the intended impact absorption. be possible.

また第２の発明では、連結材の平面部や凹面部によって大きな衝突荷重を安定して受けとめることができ、衝撃吸収効果が大きくなる。また衝撃吸収材の端面の被覆も、平面部や凹面部の両側の切込みの位置で早期に破断させることができる。 Further, in the second invention, a large impact load can be stably received by the planar portion and the concave portion of the connecting member, thereby enhancing the impact absorbing effect. Also, the covering of the end face of the shock absorbing material can be broken at an early stage at the positions of the cuts on both sides of the flat portion and the concave portion.

前記第１の切込みの長手方向の形状は、例えば直線状であるが、波状であってもよい。
切込みの長手方向の形状は、被覆の破断モードに応じて定めることができる。例えば切込みを波状とすることで、破断の仕方が単純な引張りによるものでなく局所的なせん断破壊を含む場合に被覆が破断しやすくなる可能性がある。 The shape of the first cut in the longitudinal direction is, for example, linear, but may be wavy.
The longitudinal shape of the cut can be determined according to the breaking mode of the coating. For example, wavy cuts may make the coating more likely to break if the breaking method involves localized shear failure rather than simple tensile failure.

また第３の発明では、衝撃吸収材のせん断による衝撃吸収が可能になるが、せん断による衝撃吸収を行うケースでも上記のように第１、第２の切込みを設けることで、被覆を早期に破断させることができる。 In addition, in the third invention, it is possible to absorb impact by shearing the impact absorbing material. can be made

本発明によれば、好適に衝撃吸収を行うことのできる衝撃吸収機構を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the impact-absorbing mechanism which can absorb an impact suitably can be provided.

衝撃吸収機構２の配置を示す概略図。FIG. 2 is a schematic diagram showing the arrangement of the shock absorbing mechanism 2; 衝撃吸収機構２を示す図。FIG. 2 is a diagram showing a shock absorbing mechanism 2; 被覆１ａを示す図。The figure which shows the coating|cover 1a. 衝突荷重が加わった状態の衝撃吸収機構２を示す図。The figure which shows the impact-absorbing mechanism 2 in the state to which collision load was applied. 被覆１ａの引張と破断について示す図。The figure which shows about the tension|stretching and breakage of the coating|coating 1a. バンパーリインフォース１１の変位とボルト３が受ける荷重の関係を示す図。The figure which shows the relationship of the displacement of the bumper reinforcement 11, and the load which the bolt 3 receives. 平面部５の例。An example of the plane part 5. 凹面部６の例。An example of the concave portion 6 . ボルト３’を示す図。Fig. 3 shows a bolt 3'; 切込み１５ａ、１５ｂ、１５ｃ、１５ｄを示す図。The figure which shows notch 15a, 15b, 15c, 15d. 切込み１５ｅ、１５ｆ、１５ｇを示す図。The figure which shows notch 15e, 15f, 15g. 衝撃吸収機構２ａを示す図。The figure which shows the impact-absorbing mechanism 2a. 衝突荷重が加わった状態の衝撃吸収機構２ａを示す図。The figure which shows the impact-absorbing mechanism 2a in the state to which collision load was applied.

以下、図面に基づいて本発明の実施形態について詳細に説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

［第１の実施形態］
図１は本発明の実施形態に係る衝撃吸収機構２の配置を示す概略図である。衝撃吸収機構２は車両１０に設けられ、衝突時に車両１０に加わる衝撃を吸収して衝突荷重を軽減するためのものである。衝撃吸収機構２は、フロントバンパー（不図示）のバンパーリインフォース１１と車両１０のサイドメンバ９の間に配置される。 [First Embodiment]
FIG. 1 is a schematic diagram showing the arrangement of a shock absorbing mechanism 2 according to an embodiment of the invention. The shock absorbing mechanism 2 is provided in the vehicle 10 and serves to absorb the shock applied to the vehicle 10 at the time of collision to reduce the collision load. The shock absorbing mechanism 2 is arranged between a bumper reinforcement 11 of a front bumper (not shown) and a side member 9 of the vehicle 10 .

図１の左右は車両前後方向に対応し、図１の上下は車両幅方向に対応する。以下、「前」というときは車両１０の前側を指し、図１の左側に対応する。「後」は車両１０の後側を指し、図１の右側に対応する。 Left and right in FIG. 1 correspond to the longitudinal direction of the vehicle, and up and down in FIG. 1 correspond to the width direction of the vehicle. Hereinafter, the term "front" refers to the front side of the vehicle 10 and corresponds to the left side in FIG. "Rear" refers to the rear side of vehicle 10 and corresponds to the right side of FIG.

バンパーリインフォース１１は車両前方衝突時の衝突荷重を受ける荷重受け部材であり、車両１０の前部で車両幅方向に延びるように配置される。 The bumper reinforcement 11 is a load receiving member that receives a collision load at the time of a frontal collision of the vehicle, and is arranged in the front portion of the vehicle 10 so as to extend in the vehicle width direction.

サイドメンバ９はバンパーリインフォース１１で受けた衝突荷重が伝達される被伝達部材である。サイドメンバ９は車両幅方向の左右に配置され、各サイドメンバ９とバンパーリインフォース１１の間に衝撃吸収機構２が設けられる。 The side member 9 is a transmitted member to which the collision load received by the bumper reinforcement 11 is transmitted. The side members 9 are arranged on the left and right sides in the vehicle width direction, and the impact absorbing mechanism 2 is provided between each side member 9 and the bumper reinforcement 11 .

図２は衝撃吸収機構２を示す図である。図２（ａ）は衝撃吸収機構２の水平方向の断面を示す図であり、図２（ｂ）、（ｃ）はそれぞれ図２（ａ）の線ａ－ａ、ｂ－ｂに沿った鉛直方向の断面を示す図である。また図３は被覆１ａを示す斜視図である。 FIG. 2 is a diagram showing the shock absorbing mechanism 2. As shown in FIG. 2(a) is a diagram showing a horizontal cross section of the shock absorbing mechanism 2, and FIGS. 2(b) and 2(c) are vertical cross sections along lines aa and bb in FIG. FIG. 3 is a diagram showing a cross-section in a direction; FIG. 3 is a perspective view showing the coating 1a.

図２に示すように、衝撃吸収機構２は、衝撃吸収材１、ボルト３等を有する。 As shown in FIG. 2, the shock absorbing mechanism 2 has a shock absorbing member 1, bolts 3, and the like.

衝撃吸収材１は木製の柱状部材であり、部材軸方向を車両前後方向（図２（ａ）、（ｂ）の左右方向に対応する）として、部材軸方向の両端部がそれぞれバンパーリインフォース１１側、サイドメンバ９側となるように配置される。本実施形態ではこの部材軸方向が木材の年輪の軸心方向（木材の繊維方向）に対応しているが、これに限ることはない。 The shock absorbing material 1 is a wooden columnar member, and the axial direction of the member is the vehicle front-rear direction (corresponding to the left-right direction in FIGS. 2A and 2B), and both ends in the member axial direction are on the bumper reinforcement 11 side. , the side member 9 side. In this embodiment, the axial direction of this member corresponds to the axial direction of annual rings of wood (the fiber direction of wood), but it is not limited to this.

衝撃吸収材１は、全面が樹脂などにより被覆される。すなわち、衝撃吸収材１の部材軸方向の側面および両端面が被覆され、被覆１ａにより衝撃吸収材１が外界から保護される。なお、衝撃吸収材１の端面は部材軸方向と直交する面である。 The entire surface of the impact absorbing material 1 is covered with resin or the like. That is, the side surfaces and both end surfaces of the impact absorbing material 1 in the member axial direction are covered, and the impact absorbing material 1 is protected from the outside by the coating 1a. Note that the end face of the shock absorbing member 1 is a face orthogonal to the axial direction of the member.

被覆された衝撃吸収材１の前端部はバンパーリインフォース１１に当接し、ブラケット１３によりバンパーリインフォース１１に固定される。 A front end portion of the covered impact absorbing material 1 abuts on the bumper reinforcement 11 and is fixed to the bumper reinforcement 11 by a bracket 13 .

サイドメンバ９の前端部は筒状となっており、被覆された衝撃吸収材１の後端部（一方の端部）はサイドメンバ９（一方の部材）の筒状部分の内部空間に挿入される。 The front end of the side member 9 is cylindrical, and the rear end (one end) of the covered shock absorbing material 1 is inserted into the inner space of the cylindrical portion of the side member 9 (one member). be.

ボルト３は金属製の頭付ボルトであり、衝撃吸収材１の後方に配置される。ボルト３はサイドメンバ９の前端部に連結される棒状の連結材であり、長手方向を鉛直方向（衝撃吸収材１の部材軸方向と直交する方向）として衝撃吸収材１の後端部を横断するように配置される。ボルト３は車両幅方向（図２（ａ）の上下方向に対応する）に２本配置されるが、その本数は特に限定されない。 The bolt 3 is a metal headed bolt and is arranged behind the impact absorbing material 1 . The bolt 3 is a rod-shaped connecting member that is connected to the front end of the side member 9, and traverses the rear end of the shock absorber 1 with its longitudinal direction being the vertical direction (the direction orthogonal to the member axial direction of the shock absorber 1). are arranged to Two bolts 3 are arranged in the vehicle width direction (corresponding to the vertical direction in FIG. 2(a)), but the number is not particularly limited.

ここで、衝撃吸収材１の部材軸方向から見た時（図２（ａ）の矢印参照）に、ボルト３とバンパーリインフォース１１（他方の部材）の間では、ボルト３と重複する位置にサイドメンバ９に連結された他のボルト３等が存在せず、このボルト３が衝撃吸収に大きく寄与することとなる。 Here, when viewed from the member axial direction of the shock absorbing material 1 (see the arrow in FIG. 2(a)), between the bolt 3 and the bumper reinforcement 11 (the other member), the side bolt 3 overlaps the bolt 3. Since there is no other bolt 3 or the like connected to the member 9, this bolt 3 greatly contributes to shock absorption.

ボルト３の軸部はサイドメンバ９の下面からサイドメンバ９を貫通し、軸部の先端がナット４によってサイドメンバ９の上面に固定される。これによりボルト３がサイドメンバ９の前端部に連結固定される。 The shaft portion of the bolt 3 penetrates the side member 9 from the lower surface of the side member 9 , and the tip of the shaft portion is fixed to the upper surface of the side member 9 by the nut 4 . As a result, the bolt 3 is connected and fixed to the front end portion of the side member 9 .

ボルト３の軸部には、バンパーリインフォース１１側に面した平面部５が形成される。本実施形態では、ボルト３の軸部の長手方向と直交する断面（以下、単に断面ということがある）が円の一部を直線で切取った形状となっており、平面部５は当該直線部分に形成される。平面部５はボルト３の軸部を加工して軸部と一体に形成されるが、これに限ることはない。例えば平面部５を有する別部品をボルトの軸部に別途取付けてもよい。 A flat portion 5 facing the bumper reinforcement 11 side is formed on the shaft portion of the bolt 3 . In this embodiment, the cross section perpendicular to the longitudinal direction of the shaft portion of the bolt 3 (hereinafter sometimes simply referred to as the cross section) has a shape obtained by cutting a part of a circle with a straight line. formed into parts. The flat portion 5 is formed integrally with the shaft portion of the bolt 3 by processing the shaft portion of the bolt 3, but is not limited to this. For example, a separate part having the flat portion 5 may be separately attached to the shank of the bolt.

ボルト３は、衝撃吸収材１の被覆された後端面に平面部５が対向するように配置される。衝撃吸収材１の後端面の被覆１ａには、ボルト３の平面部５の車両幅方向の両側に対応する位置に、ボルト３に沿った方向の切込み１５が各１本ずつ設けられる。図３に示すように、切込み１５は衝撃吸収材１の側面（上下面）の被覆１ａまで回り込んで設けられる。 The bolt 3 is arranged so that the flat portion 5 faces the covered rear end surface of the shock absorbing material 1 . In the cover 1a of the rear end surface of the shock absorbing member 1, one notch 15 is provided in the direction along the bolt 3 at positions corresponding to both sides of the flat portion 5 of the bolt 3 in the vehicle width direction. As shown in FIG. 3, the cuts 15 are provided around the side surfaces (upper and lower surfaces) of the shock absorbing material 1 to cover 1a.

本実施形態では、図４（ａ）の矢印Ａに示す方向に衝突荷重が加わりバンパーリインフォース１１がサイドメンバ９側に押されると、図４（ｂ）に示すように、ボルト３の平面部５が衝撃吸収材１の後端面を前方に押圧し、衝撃吸収材１のうち車両幅方向においてボルト３と対応する位置にある部分に局所的な圧縮が発生して木材が硬化し、圧縮部１９が形成される。このように、本実施形態では衝撃吸収材１の圧縮により衝突荷重が吸収される。衝撃吸収材１のその他の部分（平面部５によって押圧されない部分）は、ボルト３の平面部５によってせん断変形しながらサイドメンバ９の内部に進入する。 In this embodiment, when a collision load is applied in the direction indicated by arrow A in FIG. pushes the rear end surface of the shock absorber 1 forward, local compression occurs in the portion of the shock absorber 1 at the position corresponding to the bolt 3 in the vehicle width direction, the wood hardens, and the compressed portion 19 is formed. Thus, in this embodiment, the collision load is absorbed by compressing the shock absorbing material 1 . Other portions of the shock absorber 1 (portions not pressed by the flat portions 5 ) enter the side members 9 while undergoing shear deformation by the flat portions 5 of the bolts 3 .

ここで、仮に被覆１ａに切込み１５が無い場合、図５（ａ）に示すように衝撃吸収材１の後端面の被覆１ａがサイドメンバ９内に進入した衝撃吸収材１に引張られて伸びる恐れがあり、被覆１ａが弾性域にある間は被覆１ａの引張力Ｔがボルト３に作用してボルト３に加わる荷重が増加する。その後、衝撃吸収材１がサイドメンバ９内に更に進入し、被覆１ａが更に伸びて降伏するとボルト３に加わる荷重は急激に減少する。 Here, if the coating 1a does not have the notch 15, the coating 1a on the rear end face of the impact absorbing member 1 may be stretched by being pulled by the impact absorbing member 1 entering the side member 9 as shown in FIG. 5(a). While the coating 1a is in the elastic region, the tensile force T of the coating 1a acts on the bolt 3 and the load applied to the bolt 3 increases. After that, when the shock absorbing material 1 further enters the side member 9 and the coating 1a further expands and yields, the load applied to the bolt 3 is rapidly reduced.

一方、本実施形態では被覆１ａに切込み１５を形成していることにより、衝撃吸収材１のせん断時に被覆１ａの切込み１５に応力が集中し、図５（ｂ）に示すように被覆１ａが切込み１５の位置で早期に破断する。従って、ボルト３に加わる荷重が上記のように変動することはない。 On the other hand, in this embodiment, since the cuts 15 are formed in the coating 1a, stress concentrates on the cuts 15 of the coating 1a when the shock absorbing material 1 is sheared, and the coating 1a cuts as shown in FIG. It breaks prematurely at position 15. Therefore, the load applied to the bolt 3 does not fluctuate as described above.

図６は、上記の衝突過程におけるバンパーリインフォース１１の変位とボルト３が受ける荷重（衝撃吸収材１の圧縮によって吸収される荷重）の関係を、縦軸を荷重、横軸をバンパーリインフォース１１のサイドメンバ９側への変位として示した図である。 FIG. 6 shows the relationship between the displacement of the bumper reinforcement 11 and the load received by the bolt 3 (the load absorbed by the compression of the shock absorbing material 1) during the above collision process. It is a figure shown as a displacement to the member 9 side.

実線２１は本実施形態のように衝撃吸収材１の後端面の被覆１ａに切込み１５を設けた場合（図５（ｂ）参照）であり、上記のように被覆１ａが早期に破断するのでボルト３にはほぼ一定の荷重が加わり、衝突直後から本来の衝突荷重を安定して受け止めることができる。 A solid line 21 indicates a case where the notch 15 is provided in the coating 1a on the rear end surface of the shock absorbing material 1 as in the present embodiment (see FIG. 5(b)). A substantially constant load is applied to 3, and the original collision load can be stably received immediately after the collision.

一方、点線２３は切込みを設けない場合（図５（ａ）参照）であり、被覆１ａの引張り等によりボルト３が受ける荷重に大きな変動が生じて不安定になり、最大荷重が当初の想定より増加する恐れもある。 On the other hand, the dotted line 23 shows the case where no notch is provided (see FIG. 5(a)). There is also a fear that it will increase.

以上説明したように、第１の実施形態の衝撃吸収機構２は、木材（衝撃吸収材１）を被覆して外界から保護するという構成を有し、これにより衝撃吸収材１の劣化を防ぐことができる。ただし、単に衝撃吸収材１を被覆するというだけでは、上記したように衝撃吸収材１の端面の被覆１ａがサイドメンバ９の内部空間に進入した衝撃吸収材１に引張られてボルト３に加わる荷重を不安定とする要因となり、意図した衝撃吸収がなされない恐れがある。そこで、本実施形態では端面の被覆１ａに前記の切込み１５を設けることで被覆１ａが早期に破断するようにし、ボルト３が受ける荷重が不安定になるのを防いで意図した衝撃吸収を実現することが可能になる。 As described above, the shock absorbing mechanism 2 of the first embodiment has a structure in which the wood (shock absorbing material 1) is covered and protected from the outside world, thereby preventing deterioration of the shock absorbing material 1. can be done. However, simply covering the shock absorbing material 1 does not mean that the load applied to the bolt 3 as the covering 1a of the end face of the shock absorbing material 1 is pulled by the shock absorbing material 1 entering the internal space of the side member 9 as described above. may become a factor of instability, and the intended impact absorption may not be achieved. Therefore, in the present embodiment, the notch 15 is provided in the coating 1a on the end face so that the coating 1a is broken at an early stage, and the load received by the bolt 3 is prevented from becoming unstable, thereby achieving intended impact absorption. becomes possible.

また本実施形態ではボルト３の平面部５によって大きな衝突荷重を安定して受けとめることができ、衝撃吸収効果が大きくなる。また衝撃吸収材１の端面の被覆１ａも、平面部５の両側の切込み１５の位置で早期に破断させることができる。 In addition, in this embodiment, the flat portion 5 of the bolt 3 can stably receive a large collision load, thereby enhancing the impact absorption effect. Also, the coating 1a on the end face of the shock absorbing member 1 can be broken at the positions of the notches 15 on both sides of the flat portion 5 at an early stage.

しかしながら本発明はこれに限らない。例えば本実施形態では金属製のボルトを連結材として用いているが、連結材はサイドメンバ９に連結されたものであればよく、ボルトに限らずピン等でもよい。その材質も金属に限らず、セラミックなどでもよい。 However, the present invention is not limited to this. For example, in the present embodiment, a metal bolt is used as the connecting member, but the connecting member may be anything that is connected to the side member 9, and may be a pin or the like instead of the bolt. The material thereof is not limited to metal, and may be ceramic or the like.

また連結材の断面形状も本実施形態で説明したものに限らない。例えば図７（ａ）は半円形と矩形とを組み合わせた形状であり、矩形部分に平面部５を有する。また図７（ｂ）、（ｃ）のように断面を多角形状（図７（ｂ）は四角形状、図７（ｃ）は六角形状）として連結材に平面部５を設けることも可能である。 Also, the cross-sectional shape of the connecting member is not limited to that described in the present embodiment. For example, FIG. 7A shows a shape in which a semicircle and a rectangle are combined, and has a flat portion 5 in the rectangular portion. 7(b) and 7(c), it is also possible to provide the planar portion 5 on the connecting member with a polygonal cross section (square in FIG. 7(b) and hexagonal in FIG. 7(c)). .

あるいは、平面部５の代わりに凹面部を設けてもよく、平面部５を設けた場合と同様の効果が得られる。例えば図８（ａ）のように円の一部を円弧で切り取った断面形状としたり、図８（ｂ）のように矩形の一部を円弧で切り取った断面形状とするなどして凹面部６を設けることができる。また凹面部６は円弧状に限らず、例えば図８（ｃ）のように矩形の一部を楔形に切り取った断面形状とし、直線によって楔状に形成された凹面部６を設けてもよい。 Alternatively, a concave portion may be provided instead of the flat portion 5, and the same effect as when the flat portion 5 is provided can be obtained. For example, as shown in FIG. 8(a), the concave surface portion 6 has a cross-sectional shape in which a part of a circle is cut off with an arc, or a cross-sectional shape in which a part of a rectangle is cut off with an arc as shown in FIG. 8(b). can be provided. Further, the concave surface portion 6 is not limited to a circular arc shape. For example, as shown in FIG.

さらに、連結材に平面部５や凹面部６を設けず、バンパーリインフォース１１側に向かって凸となる断面形状としてもよい。例えば図９の例ではボルト３’（連結材）の断面が円形であり、バンパーリインフォース１１側（図の左側）に向かって凸となる。この場合、各ボルト３’の軸心位置に合わせて１本の切込み１５を設けることで、前記と同様、被覆１ａを早期に破断させることができる。その他、連結材として板材を用いること等も可能である。 Furthermore, the flat portion 5 and the concave portion 6 may not be provided on the connecting member, and the cross-sectional shape may be convex toward the bumper reinforcement 11 side. For example, in the example of FIG. 9, the cross section of the bolt 3' (connecting member) is circular and protrudes toward the bumper reinforcement 11 side (left side in the drawing). In this case, by providing one notch 15 in accordance with the axial center position of each bolt 3', the coating 1a can be broken at an early stage as described above. In addition, it is also possible to use a plate member as the connecting member.

また、本実施形態では切込み１５を衝撃吸収材１の側面の被覆１ａまで回り込ませて被覆１ａを破断しやすくしているが、切込み１５は衝撃吸収材１の端面の被覆１ａのみに設けてもよい。 Further, in the present embodiment, the cut 15 extends to the coating 1a on the side surface of the shock absorbing material 1 to facilitate breaking of the coating 1a. good.

また、本実施形態では切込み１５の長手方向の形状を直線状としているが、切込み１５の長手方向の形状はこれに限らない。例えば図１０（ａ）の切込み１５ａのように三角波形状としたり、図１０（ｂ）の切込み１５ｂのように矩形波状としたり、図１０（ｃ）の切込み１５ｃのように半円を波状に繰り返したものとすることが可能である。また図１０（ｄ）の切込み１５ｄのように長手方向に不連続となるミシン目状とすることも可能である。 Also, in the present embodiment, the shape of the cut 15 in the longitudinal direction is linear, but the shape of the cut 15 in the longitudinal direction is not limited to this. For example, it has a triangular wave shape like a cut 15a in FIG. 10(a), a rectangular wave shape like a cut 15b in FIG. It is possible to assume that It is also possible to form perforations that are discontinuous in the longitudinal direction, such as cuts 15d in FIG. 10(d).

また、本実施形態では切込み１５の長手方向と直交する断面を三角形状としているが、切込みの断面形状もこれに限らない。例えば図１１（ａ）の切込み１５ｅのように矩形断面としたり、図１１（ｂ）の切込み１５ｆのように直線状の断面としたり、図１１（ｃ）の切込み１５ｇのように半円形の断面としたりすることが可能である。 Further, in the present embodiment, the cut 15 has a triangular cross-section perpendicular to the longitudinal direction, but the cross-sectional shape of the cut is not limited to this. For example, a rectangular cross section like the cut 15e in FIG. 11(a), a straight cross section like the cut 15f in FIG. 11(b), or a semicircular cross section like the cut 15g in FIG. 11(c) It is possible to

切込みの位置での被覆１ａの破断は単純な引張りによるものでなく局所的なせん断破壊等を含む場合があり、それらのモードに合わせて上記のように切込みの長手方向の形状や断面形状を定めることで、被覆１ａがより破断しやすくなる可能性がある。例えば局所的なせん断破壊が卓越する場合は図１０（ａ）～（ｄ）のように切込みを波状やミシン目状とすることで被覆１ａが破断しやすくなる可能性があり、また図１１（ａ）の切込み１５ｅのように断面形状を矩形とすると、応力集中部が増大することにより被覆１ａが破断しやすくなる可能性がある。 Fracture of the coating 1a at the position of the cut is not due to simple tension, but may include local shear fracture, etc., and the longitudinal shape and cross-sectional shape of the cut are determined as described above according to those modes. This may make the coating 1a more likely to break. For example, if local shear fracture is dominant, the coating 1a may be easily broken by making the cuts wavy or perforated as shown in FIGS. If the cross-sectional shape is rectangular like the notch 15e of a), there is a possibility that the coating 1a is likely to break due to an increase in the stress concentration portion.

以下、本発明の別の例について、第２の実施形態として説明する。第２の実施形態は第１の実施形態と異なる点について説明し、同様の構成については図等で同じ符号を付すなどして説明を省略する。また、第１、第２の実施形態で説明する構成は必要に応じて組み合わせることができる。 Another example of the present invention will be described below as a second embodiment. 2nd Embodiment demonstrates a different point from 1st Embodiment, A description is abbreviate|omitted by attaching|subjecting the same code|symbol in a figure etc. about the same structure. Also, the configurations described in the first and second embodiments can be combined as necessary.

［第２の実施形態］
図１２は本発明の第２の実施形態の衝撃吸収機構２ａを示す図である。図１２（ａ）は衝撃吸収機構２ａの水平方向の断面を図２（ａ）と同様に示す図であり、図１２（ｂ）、（ｃ）はそれぞれ図１２（ａ）の線ｃ－ｃ、ｄ－ｄに沿った鉛直方向の断面を示す図である。 [Second embodiment]
FIG. 12 shows a shock absorbing mechanism 2a according to a second embodiment of the invention. FIG. 12(a) is a diagram showing a horizontal cross section of the shock absorbing mechanism 2a in the same manner as FIG. 2(a), and FIGS. , dd. FIG.

この衝撃吸収機構２ａは、衝撃吸収材１のせん断による衝撃吸収を行う点で第１の実施形態と異なる。 This impact absorbing mechanism 2a differs from the first embodiment in that it absorbs impact by shearing the impact absorbing material 1. FIG.

すなわち、衝撃吸収機構２ａでは、被覆された衝撃吸収材１の前端部（他方の端部）が筒状のバンパーリインフォース１１ａの後壁に設けられた開口１１０からバンパーリインフォース１１ａ（他方の部材）の内部空間に挿入される。衝撃吸収材１の被覆された前端面とバンパーリインフォース１１ａの前壁の間には隙間が設けられる。 That is, in the shock absorbing mechanism 2a, the front end portion (the other end portion) of the covered shock absorbing material 1 extends from the opening 110 provided in the rear wall of the cylindrical bumper reinforcement 11a to the bumper reinforcement 11a (the other member). inserted into the inner space. A gap is provided between the covered front end surface of the shock absorbing material 1 and the front wall of the bumper reinforcement 11a.

衝撃吸収機構２ａは、第１の実施形態の衝撃吸収機構２の構成に加え、バンパーリインフォース１１ａに連結されるボルト３（連結材）を更に有する。当該ボルト３は衝撃吸収材１の前方に設けられ、長手方向を鉛直方向（衝撃吸収材１の部材軸方向と直交する方向）として衝撃吸収材１の前端部を横断するように配置される。 The shock absorbing mechanism 2a further has a bolt 3 (connecting member) connected to the bumper reinforcement 11a in addition to the configuration of the shock absorbing mechanism 2 of the first embodiment. The bolt 3 is provided in front of the shock absorbing member 1 and arranged so as to cross the front end portion of the shock absorbing member 1 with its longitudinal direction being the vertical direction (the direction perpendicular to the axial direction of the member of the shock absorbing member 1).

当該ボルト３の軸部はバンパーリインフォース１１ａの下面からバンパーリインフォース１１ａを貫通し、軸部の先端がナット４によってバンパーリインフォース１１ａの上面に固定される。当該ボルト３はサイドメンバ９側に平面部５が位置するように配置される。 The shaft portion of the bolt 3 penetrates the bumper reinforcement 11a from the lower surface of the bumper reinforcement 11a, and the tip of the shaft portion is fixed to the upper surface of the bumper reinforcement 11a by a nut 4. The bolt 3 is arranged so that the flat portion 5 is located on the side member 9 side.

また、部材軸方向から見た時（図１２（ａ）の矢印参照）に、衝撃吸収材１の前後のボルト３は異なる位置に配置され、これらの平面部５同士が向き合わないようになっている。さらに、部材軸方向から見た時に、衝撃吸収材１の前方のボルト３とサイドメンバ９の間では、衝撃吸収材１の前方のボルト３と重複する位置にバンパーリインフォース１１ａに連結された他のボルト３等が存在しない。 When viewed from the axial direction of the member (see arrows in FIG. 12(a)), the front and rear bolts 3 of the impact absorbing member 1 are arranged at different positions so that the plane portions 5 do not face each other. there is Furthermore, when viewed in the axial direction of the member, between the bolt 3 in front of the shock absorber 1 and the side member 9, another bolt connected to the bumper reinforcement 11a overlaps the bolt 3 in front of the shock absorber 1. There is no bolt 3 or the like.

なお、バンパーリインフォース１１ａの前壁において衝撃吸収材１の後方のボルト３と車両幅方向に対応する位置には開口１１１が形成される。 An opening 111 is formed in the front wall of the bumper reinforcement 11a at a position corresponding to the rear bolt 3 of the shock absorbing member 1 in the vehicle width direction.

衝撃吸収材１の後端面の被覆１ａには、衝撃吸収材１の後方のボルト３の平面部５の片側に対応する位置に、当該ボルト３に沿った方向の切込み１５が設けられる。切込み１５は、部材軸方向から見た時に衝撃吸収材１の前後のボルト３の間となる位置に設けられる。 The cover 1a on the rear end surface of the shock absorbing member 1 is provided with a notch 15 in the direction along the bolt 3 at a position corresponding to one side of the flat portion 5 of the bolt 3 behind the shock absorbing member 1 . The notch 15 is provided at a position between the front and rear bolts 3 of the shock absorber 1 when viewed from the member axial direction.

衝撃吸収材１の前端面の被覆１ａには、衝撃吸収材１の前方のボルト３の平面部５の両側に対応する位置に、当該ボルト３に沿った方向の切込み１５が各１本ずつ設けられる。これらの切込み１５も、部材軸方向から見た時に衝撃吸収材１の前後のボルト３の間となる位置に設けられる。 In the covering 1a of the front end face of the shock absorbing material 1, one notch 15 is provided in each direction along the bolt 3 at positions corresponding to both sides of the flat portion 5 of the bolt 3 in front of the shock absorbing material 1. be done. These cuts 15 are also provided at positions between the bolts 3 on the front and rear sides of the shock absorber 1 when viewed in the axial direction of the member.

本実施形態では、図１３の矢印Ａに示すように衝突荷重が加わりバンパーリインフォース１１ａがサイドメンバ９側に押されると、衝突初期に衝撃吸収材１の後方のボルト３がその平面部５により衝撃吸収材１の後端面の一部を前方に押圧し、衝撃吸収材１の前方のボルト３がその平面部５により衝撃吸収材１の前端面の一部を後方に押圧して、衝撃吸収材１の前後のボルト３の車両幅方向の間で衝撃吸収材１のせん断が誘発される。 In this embodiment, when a collision load is applied and the bumper reinforcement 11a is pushed toward the side member 9 as indicated by arrow A in FIG. A part of the rear end face of the shock absorbing material 1 is pushed forward, and the bolt 3 in front of the shock absorbing material 1 pushes a part of the front end face of the shock absorbing material 1 rearward by the flat part 5 thereof, thereby Shearing of the impact absorbing material 1 is induced between the bolts 3 on the front and rear sides of the bolt 3 in the vehicle width direction.

そして、衝撃吸収材１の前方のボルト３と車両幅方向に対応する位置の衝撃吸収材１－１は、サイドメンバ９の内部を後方に進む。一方、衝撃吸収材１の後方のボルト３と車両幅方向において対応する位置の衝撃吸収材１－２は、バンパーリインフォース１１ａ内を開口１１１に向かって前方に進む。 Then, the bolt 3 in front of the shock absorbing member 1 and the shock absorbing member 1-1 at a position corresponding to the width direction of the vehicle advance inside the side member 9 rearward. On the other hand, the bolt 3 behind the shock absorbing member 1 and the shock absorbing member 1-2 at a corresponding position in the vehicle width direction move forward toward the opening 111 within the bumper reinforcement 11a.

第２の実施形態では、せん断の発生によって衝撃が吸収され、サイドメンバ９側に伝達される衝突荷重を軽減することができる。この場合も、衝撃吸収材１の前端面と後端面の被覆１ａは切込み１５によって早期に破断し、被覆１ａの引張り等によってボルト３に加わる荷重が不安定になることが無く、意図した衝撃吸収が実現できる。 In the second embodiment, the impact is absorbed by the generation of shear, and the collision load transmitted to the side member 9 can be reduced. In this case also, the coating 1a on the front end surface and the rear end surface of the shock absorbing material 1 is broken early by the cut 15, and the load applied to the bolt 3 by the tension of the coating 1a does not become unstable, and the intended shock absorption is achieved. can be realized.

以上、添付図面を参照しながら、本発明に係る好適な実施形態について説明したが、本発明はかかる例に限定されない。当業者であれば、本願で開示した技術的思想の範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、そ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。 Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope of the technical ideas disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

例えば前記の各実施形態では車両１０のバンパーリインフォースとサイドメンバの間に衝撃吸収機構を設置しているが、衝撃吸収機構は車両１０において衝突時の荷重を受ける荷重受け部材と当該荷重が伝達される被伝達部材の間に設ければよく、バンパーリインフォースとサイドメンバの間に設けるものに限らない。例えば車両側突時の衝突荷重を軽減することを目的として、車両側部のボディー本体と車両内部のバッテリーケース等の間に設けてもよい。また車両１０の種類も特に限定されない。 For example, in each of the above-described embodiments, the shock absorbing mechanism is installed between the bumper reinforcement and the side members of the vehicle 10. The shock absorbing mechanism is a load receiving member that receives the load at the time of collision in the vehicle 10 and the load is transmitted. It is not limited to the one provided between the bumper reinforcement and the side member. For example, for the purpose of reducing the impact load at the time of a side collision of the vehicle, it may be provided between the body main body on the side of the vehicle and the battery case or the like inside the vehicle. Also, the type of vehicle 10 is not particularly limited.

１：衝撃吸収材
１ａ：被覆
２、２ａ：衝撃吸収機構
３、３'：ボルト
４：ナット
５：平面部
６：凹面部
９：サイドメンバ
１０：車両
１１、１１ａ：バンパーリインフォース
１３：ブラケット
１５、１５ａ、１５ｂ、１５ｃ、１５ｄ、１５ｅ、１５ｆ、１５ｇ：切込み
１９：圧縮部 1: shock absorbing material 1a: coating 2, 2a: shock absorbing mechanism 3, 3': bolt 4: nut 5: flat portion 6: concave portion 9: side member 10: vehicle 11, 11a: bumper reinforcement 13: bracket 15, 15a, 15b, 15c, 15d, 15e, 15f, 15g: notch 19: compressed portion

Claims

車両に加わる衝突荷重を軽減するための衝撃吸収機構であって、
衝突荷重を受ける荷重受け部材と前記衝突荷重が前記荷重受け部材から伝達される被伝達部材の間に設けられ、
部材軸方向の一方の端部が前記荷重受け部材と前記被伝達部材のうち一方の部材の内部空間に挿入された木製の柱状の衝撃吸収材と、
前記一方の部材に連結された第１の連結材と、
を具備し、
衝突時に前記第１の連結材が前記衝撃吸収材の前記一方の端部の端面の一部を押圧し、
前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第１の連結材に沿った方向の第１の切込みが設けられ、
前記第１の連結材は、前記荷重受け部材と前記被伝達部材のうち他方の部材に面した凸部を有し、
前記第１の切込みが、前記衝撃吸収材の部材軸方向から見た時に前記凸部と重なる位置で形成されたことを特徴とする衝撃吸収機構。 A shock absorbing mechanism for reducing a collision load applied to a vehicle,
provided between a load receiving member that receives a collision load and a member to which the collision load is transmitted from the load receiving member;
a wooden column-shaped shock absorbing member having one end in the member axial direction inserted into an internal space of one of the load receiving member and the transmitted member;
a first connecting member connected to the one member;
and
At the time of collision, the first connecting member presses part of the end surface of the one end of the shock absorbing member,
The end surface of the shock absorbing material is covered, and the covering of the end surface is provided with a first cut in a direction along the first connecting member ,
the first connecting member has a convex portion facing the other of the load receiving member and the transmitted member;
A shock absorbing mechanism , wherein the first notch is formed at a position overlapping with the projection when viewed from the member axial direction of the shock absorbing material .

車両に加わる衝突荷重を軽減するための衝撃吸収機構であって、
衝突荷重を受ける荷重受け部材と前記衝突荷重が前記荷重受け部材から伝達される被伝達部材の間に設けられ、
部材軸方向の一方の端部が前記荷重受け部材と前記被伝達部材のうち一方の部材の内部空間に挿入された木製の柱状の衝撃吸収材と、
前記一方の部材に連結された第１の連結材と、
を具備し、
衝突時に前記第１の連結材が前記衝撃吸収材の前記一方の端部の端面の一部を押圧し、
前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第１の連結材に沿った方向の第１の切込みが設けられ、
前記第１の連結材は、前記荷重受け部材と前記被伝達部材のうち他方の部材に面した平面部または凹面部を有し、
前記第１の切込みが、前記平面部または凹面部の両側に当たる位置で形成されたことを特徴とする衝撃吸収機構。 A shock absorbing mechanism for reducing a collision load applied to a vehicle,
provided between a load receiving member that receives a collision load and a member to which the collision load is transmitted from the load receiving member;
a wooden column-shaped shock absorbing member having one end in the member axial direction inserted into an internal space of one of the load receiving member and the transmitted member;
a first connecting member connected to the one member;
and
At the time of collision, the first connecting member presses part of the end surface of the one end of the shock absorbing member,
The end surface of the shock absorbing material is covered, and the covering of the end surface is provided with a first cut in a direction along the first connecting member,
the first connecting member has a planar portion or a concave portion facing the other of the load receiving member and the transmitted member;
An impact absorbing mechanism , wherein the first cuts are formed at positions corresponding to both sides of the flat portion or the concave portion .

前記第１の切込みの長手方向の形状が、直線状であることを特徴とする請求項１または請求項２に記載の衝撃吸収機構。 3. The shock absorbing mechanism according to claim 1, wherein the longitudinal shape of said first cut is linear.

前記第１の切込みの長手方向の形状が、波状であることを特徴とする請求項１または請求項２に記載の衝撃吸収機構。 3. The shock absorbing mechanism according to claim 1, wherein the longitudinal shape of said first cut is wave-like.

車両に加わる衝突荷重を軽減するための衝撃吸収機構であって、
衝突荷重を受ける荷重受け部材と前記衝突荷重が前記荷重受け部材から伝達される被伝達部材の間に設けられ、
部材軸方向の一方の端部が前記荷重受け部材と前記被伝達部材のうち一方の部材の内部空間に挿入された木製の柱状の衝撃吸収材と、
前記一方の部材に連結された第１の連結材と、
を具備し、
衝突時に前記第１の連結材が前記衝撃吸収材の前記一方の端部の端面の一部を押圧し、
前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第１の連結材に沿った方向の第１の切込みが設けられ、
前記衝撃吸収材の部材軸方向の他方の端部は、前記荷重受け部材と前記被伝達部材のうち他方の部材の内部空間に挿入され、
前記他方の部材に連結された第２の連結材を更に具備し、
衝突時に前記第２の連結材が前記衝撃吸収材の前記他方の端部の端面の一部を押圧し、
前記衝撃吸収材の当該端面が被覆され、当該端面の被覆に前記第２の連結材に沿った方向の第２の切込みが設けられ、
前記第１、第２の連結材は、前記衝撃吸収材の部材軸方向から見た時に異なる位置に配置され、
前記第１、第２の切込みは、前記衝撃吸収材の部材軸方向から見た時に前記第１、第２の連結材の間に設けられることを特徴とする衝撃吸収機構。 A shock absorbing mechanism for reducing a collision load applied to a vehicle,
provided between a load receiving member that receives a collision load and a member to which the collision load is transmitted from the load receiving member;
a wooden column-shaped shock absorbing member having one end in the member axial direction inserted into an internal space of one of the load receiving member and the transmitted member;
a first connecting member connected to the one member;
and
At the time of collision, the first connecting member presses part of the end surface of the one end of the shock absorbing member,
The end surface of the shock absorbing material is covered, and the covering of the end surface is provided with a first cut in a direction along the first connecting member ,
the other end of the shock absorbing member in the member axial direction is inserted into the internal space of the other member of the load receiving member and the transmitted member;
further comprising a second connecting member connected to the other member;
At the time of collision, the second connecting member presses part of the end surface of the other end of the shock absorbing member,
The end surface of the shock absorbing material is coated, and the coating of the end surface is provided with a second cut in a direction along the second connecting member,
The first and second connecting members are arranged at different positions when viewed from the member axial direction of the shock absorbing member,
A shock absorbing mechanism , wherein the first and second cuts are provided between the first and second connecting members when viewed from the member axial direction of the shock absorbing member .