JP2008080925A - Bumper structure for automobile - Google Patents

Bumper structure for automobile Download PDF

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Publication number
JP2008080925A
JP2008080925A JP2006262230A JP2006262230A JP2008080925A JP 2008080925 A JP2008080925 A JP 2008080925A JP 2006262230 A JP2006262230 A JP 2006262230A JP 2006262230 A JP2006262230 A JP 2006262230A JP 2008080925 A JP2008080925 A JP 2008080925A
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bumper beam
crash
bumper
wall surface
fixed
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JP5061557B2 (en
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Takayuki Nakamae
隆行 中前
Koji Matsushita
幸治 松下
Isamu Kizaki
勇 木▲崎▼
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Mazda Motor Corp
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Mazda Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bumper structure for an automobile, which attains a larger size of a cross section of a crush can and enhances load transmitting performance from a bumper beam while obtaining the length of the crush can. <P>SOLUTION: The bumper structure is provided with: the bumper beam 10 comprising a vertical wall part 10b and upper and lower wall surface parts 10c, 10d extending from its upper and lower ends toward a vehicle body frame 18 side; the crush can 9 having a distal end passing through a clearance between the upper and lower wall surface parts 10c, 10d of the bumper beam 10 and fixed to the vertical wall part 10b of the bumper beam 10; a first connection part 25 extending from a base end of the crush can 9 toward the upper and wall surface parts 10c, 10d of the bumper beam 10 and fixed to at least one wall surface part 10c end; and a second connection part 26 having a contracted vertical width at the first connection part 25, passing through the clearance between the upper and lower wall surface parts 10c, 10d of the bumper beam 10, and being fixed to the vertical wall part 10b of the bumper beam 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、縦壁部とその上下端から車体フレーム側に向かって延びる上下壁面部とから構成されるバンパビームと、先端がバンパビームの上下壁面部の間を通って縦壁部に固定されるクラッシュカンと、を備えたような自動車のバンパ構造に関する。   The present invention provides a bumper beam composed of a vertical wall portion and an upper and lower wall surface portion extending from the upper and lower ends thereof toward the body frame side, and a crash in which a tip passes between the upper and lower wall surface portions of the bumper beam and is fixed to the vertical wall portion. The present invention relates to a bumper structure of an automobile including a can.

従来、上述例の自動車のバンパ構造としては、特許文献１に記載された構造がある。
すなわち、縦壁部と、該縦壁部の上端から車体フレームとしてのフロントサイドメンバ側に向かって延びる上壁面部と、上記縦壁部の下端からフロントサイドメンバ側に向かって延びる下壁面部とを備えた断面コ字状のバンパビームを設け、上記フロントサイドメンバからバンパビームに向けて延びるクラッシュカンの先端を、上記バンパビームの上下壁面部の間を通って縦壁部に固定した構造である。 Conventionally, as the bumper structure of the automobile in the above example, there is a structure described in Patent Document 1.
That is, a vertical wall portion, an upper wall surface portion extending from the upper end of the vertical wall portion toward the front side member as a vehicle body frame, and a lower wall surface portion extending from the lower end of the vertical wall portion toward the front side member side A bumper beam having a U-shaped cross section is provided, and the tip of a crash can extending from the front side member toward the bumper beam is fixed to the vertical wall portion through the upper and lower wall surface portions of the bumper beam.

この構造によれば、バンパビームを断面コ字状に形成し、クラッシュカンの先端部をバンパビーム内に差込むように固定しているので、閉断面構造のバンパビームにクラッシュカンを取付ける構造と比較して、クラッシュカンの長さを長くすることができ、これにより、該クラッシュカンのエネルギ吸収量の増大を図ることができる。   According to this structure, the bumper beam is formed in a U-shaped cross section, and the tip of the crash can is fixed so as to be inserted into the bumper beam. Compared to the structure in which the crash can is attached to the bumper beam having a closed section structure. The length of the crash can can be increased, thereby increasing the amount of energy absorbed by the crash can.

一方で上述のバンパビームによる衝突荷重の受け面拡大を図ることも要請される。そこで、特許文献２に開示されているように、バンパビームの車幅方向中央部に該バンパビームの前後幅全域にわたって上方に延びる門形状の延出部を設け、この延出部を設けたことによりバンパビームによる衝突荷重の受け面拡大を図る構造が既に発明されている。   On the other hand, it is also required to expand the receiving surface of the collision load by the above bumper beam. Therefore, as disclosed in Patent Document 2, a bumper beam is provided at the center in the vehicle width direction of the bumper beam by providing a gate-shaped extension extending upwardly across the entire front-rear width of the bumper beam. A structure for enlarging the receiving surface of the collision load due to the above has already been invented.

このように延出部を有するバンパビームを、該バンパビームの上下壁面部間を通る上下幅の小さいクラッシュカンで受ける場合、クラッシュカンによるバンパビームの受けが不安定となる問題点があった。   When the bumper beam having the extending portion is received by a crash can having a small vertical width passing between the upper and lower wall surface portions of the bumper beam, there is a problem that reception of the bumper beam by the crash can becomes unstable.

特に、上述の延出部をバンパビームの上下方向の片側に設けた場合には、衝突荷重が一方向に片寄って入力されるので、上下幅の小さいクラッシュカンで斯る衝突荷重を受ける時、上記問題点がより一層顕著となる。   In particular, when the above-described extending portion is provided on one side of the bumper beam in the vertical direction, the collision load is shifted in one direction, so when receiving such a collision load with a crash can with a small vertical width, The problem becomes even more pronounced.

特開平９−９５１８９号公報JP-A-9-95189 特開２００３−２５２１３４号公報JP 2003-252134 A

そこで、この発明は、縦壁部とその上下端から車体フレーム側に向かって延びる上下壁面部から構成されるバンパビームと、先端がバンパビームの上下壁面部の間を通って縦壁部に固定されるクラッシュカンと、を備えたものにおいて、クラッシュカンは、基端からバンパビームの上下の壁面部に向かって延び少なくとも上下何れかの壁面部端部に固定される第１接続部と、該第１接続部で上下幅が縮小されバンパビームの上下壁面部の間を通って縦壁部に固定される第２接続部とを備えることで、クラッシュカンの長さを稼いで、エネルギ吸収量の増大を図りつつ、クラッシュカンの断面の大型化およびバンパビームからの荷重伝達性能の向上を図ることができる自動車のバンパ構造の提供を目的とする。   In view of this, the present invention provides a bumper beam composed of a vertical wall portion and an upper and lower wall surface portion extending from the upper and lower ends thereof toward the body frame side, and a tip is fixed to the vertical wall portion through between the upper and lower wall surface portions of the bumper beam. The crash can includes a first connection portion that extends from the base end toward the upper and lower wall surface portions of the bumper beam and is fixed to at least one of the upper and lower wall surface portion, and the first connection. And a second connecting portion that is fixed to the vertical wall portion through the space between the upper and lower wall surface portions of the bumper beam, thereby increasing the length of the crash can and increasing the energy absorption amount. On the other hand, an object of the present invention is to provide a bumper structure for an automobile capable of increasing the size of the cross section of the crash can and improving the load transmission performance from the bumper beam.

この発明による自動車のバンパ構造は、縦壁部とその上下端から車体フレーム側に向かって延びる上下の壁面部とから構成されるバンパビームと、先端がバンパビームの上下の壁面部の間を通ってバンパビームの縦壁部に固定されるクラッシュカンと、クラッシュカンの基端からバンパビームの上下の壁面部に向かって延び少なくとも上下何れかの壁面部端部に固定される第１接続部と、第１接続部で上下幅が縮小されバンパビームの上下の壁面部の間を通って該バンパビームの縦壁部に固定される第２接続部と、を備えたものである。
上記構成によれば、バンパビームは縦壁部と上下の壁面部とを備えて、車体フレーム側が開放したコ字状断面構造を有しており、クラッシュカンの第２接続部は第１接続部でその上下幅が縮小されてバンパビームの上下の壁面部の間を通って該バンパビームの縦壁部に固定されるので、クラッシュカンの長さを稼ぎ、エネルギ吸収量の増大を図ることができる。 The bumper structure of an automobile according to the present invention includes a bumper beam composed of a vertical wall portion and upper and lower wall surface portions extending from the upper and lower ends thereof toward the vehicle body frame side, and a bumper beam whose tip passes between the upper and lower wall surface portions of the bumper beam. A first can connected to the vertical wall of the bumper beam, extending from the base end of the crash can toward the upper and lower wall surfaces of the bumper beam, and fixed to at least one of the upper and lower wall surface portions. And a second connection portion that is reduced in vertical width at the portion and passes between the upper and lower wall surface portions of the bumper beam and is fixed to the vertical wall portion of the bumper beam.
According to the above configuration, the bumper beam has a vertical wall portion and upper and lower wall surface portions, and has a U-shaped cross-sectional structure with the body frame side open, and the second connection portion of the crash can is the first connection portion. The vertical width of the bumper beam is reduced and fixed between the upper and lower wall surface portions of the bumper beam and fixed to the vertical wall portion of the bumper beam. Therefore, the length of the crash can can be increased, and the amount of energy absorption can be increased.

また、クラッシュカンの基端からバンパビームの上下の壁面部に向かって延びる第１接続部は、第２接続部に対してその上下幅が必然的に大きく形成されることになり、かつクラッシュカンのこれら第１接続部、第２接続部とバンパビームとが固定されているので、クラッシュカンの断面の大型化を図ってクラッシュカンによるバンパビームの受けが安定すると共に、バンパビームからクラッシュカンへの荷重伝達性能の向上を図ることができる。   In addition, the first connection portion extending from the base end of the crash can toward the upper and lower wall surface portions of the bumper beam is inevitably formed to have a vertical width larger than that of the second connection portion. Since the first connection part, the second connection part, and the bumper beam are fixed, the size of the cross section of the crash can is increased so that the bumper beam is stably received by the crash can and the load transmission performance from the bumper beam to the crash can is achieved. Can be improved.

この発明の一実施態様においては、上記バンパビームの壁面部に形成されたバンパビーム側のフランジ部と、上記クラッシュカンの第１接続部に形成されバンパビーム側のフランジ部と対向して該フランジ部に接合されるクラッシュカン側のフランジ部と、を備えたものである。
上記構成によれば、バンパビーム側のフランジ部と、クラッシュカン側のフランジ部との両フランジ部同士を接合させたので、効率的に衝突荷重を受けることができる。 In one embodiment of the present invention, the bumper beam side flange portion formed on the wall surface portion of the bumper beam and the bumper beam side flange portion formed on the first connection portion of the crash can are joined to the flange portion. And a flange portion on the crush can side.
According to the above configuration, the flange portion on the bumper beam side and the flange portion on the crash can side are joined to each other, so that a collision load can be efficiently received.

この発明の一実施態様においては、上記クラッシュカンの上下方向中心に対して、上記バンパビームの上下方向中心が上下方向にオフセットされ、上記第１接続部はバンパビームがオフセットされる側にのみ設けられたものである。
上記構成によれば、バンパビームがオフセットされる側には大きな衝突荷重が作用するが、この片寄った荷重を第１接続部と第２接続部とで受けるので、オフセットされる側の変形量が大きくなるのを抑制することができ、また第１接続部はバンパビームがオフセットされる側にのみ設けるので、構造的にもシンプルとなる。 In one embodiment of the present invention, the vertical center of the bumper beam is offset in the vertical direction with respect to the vertical center of the crash can, and the first connection portion is provided only on the side where the bumper beam is offset. Is.
According to the above configuration, a large collision load acts on the side where the bumper beam is offset. However, since the offset load is received by the first connection portion and the second connection portion, the amount of deformation on the offset side is large. Since the first connecting portion is provided only on the side where the bumper beam is offset, the structure is simple.

この発明の一実施態様においては、上記バンパはリヤバンパであり、リヤエンドパネルと、該リヤエンドパネルのゲート開口下端に対応して形成され、かつ後端がバンパビーム前端より後方に位置する閉断面部と、バンパビームの後端から上方に延出し、その前端が該バンパビームの前端から間隔を隔ててバンパビーム上面部に固定された延出部とを備え、上記第１接続部はクラッシュカンの上部側にのみ形成されたものである。
上記構成によれば、バンパビームに設けた延出部と対応して上記第１接続部をクラッシュカンの上部側にのみ形成したので、クラッシュカンの上部の変形量をその下部側と略均等に成すことができ、またバンパビームには上述の延出部を設けたので、該バンパビームの衝突荷重の受け面を上方に拡大することができ、さらに、リヤエンドパネルにはその後端がバンパビームの前端よりも後方に位置する閉断面部を設け、この閉断面部と干渉しないように延出部の前端をバンパビームの前端から間隔を隔ててバンパビーム上面部に固定したので、リヤエンドパネルの閉断面部の大型化を図って、リヤエンド部の車体剛性向上を図ることができる。 In one embodiment of the present invention, the bumper is a rear bumper, a rear end panel, a closed cross-section portion formed corresponding to the lower end of the gate opening of the rear end panel, and a rear end positioned behind the front end of the bumper beam; The bumper beam extends upward from the rear end of the bumper beam, and the front end of the bumper beam is extended from the front end of the bumper beam. The first connection portion is formed only on the upper side of the crash can. It has been done.
According to the above configuration, since the first connecting portion is formed only on the upper side of the crash can corresponding to the extending portion provided on the bumper beam, the deformation amount of the upper portion of the crash can is substantially equal to the lower side. In addition, since the bumper beam is provided with the above-described extending portion, the impact load receiving surface of the bumper beam can be expanded upward, and the rear end panel has a rear end behind the front end of the bumper beam. The front end of the extension is fixed to the upper surface of the bumper beam at a distance from the front end of the bumper beam so as not to interfere with the closed cross section. As a result, the vehicle body rigidity of the rear end portion can be improved.

この発明の一実施態様においては、上記クラッシュカン後方に位置する延出部の前端が第１接続部の近傍に固定されたものである。
上記構成によれば、延出部の前端は第１接続部の近傍に固定されているので、延出部に作用する衝突荷重を第１接続部で効率的に受けることができる。 In one embodiment of the present invention, the front end of the extending portion located behind the crash can is fixed in the vicinity of the first connecting portion.
According to the above configuration, since the front end of the extending portion is fixed in the vicinity of the first connecting portion, a collision load acting on the extending portion can be efficiently received by the first connecting portion.

この発明の一実施態様においては、上記クラッシュカンは、第１接続部と第２接続部とをそれぞれ備えた左右の２部材を接合して構成されたものである。
上記構成によれば、クラッシュカンの長さを稼ぎ、エネルギ吸収量の増大を図りつつ、クラッシュカンの断面の大型化およびバンパビームからの荷重伝達性能の向上を図るという効果を備えて成る該クラッシュカンを左右の２部材から容易に成形加工することができ、成形性の向上を図ることができる。 In one embodiment of the present invention, the crash can is configured by joining two left and right members each having a first connection portion and a second connection portion.
According to the above configuration, the crash can has the effects of increasing the length of the crash can and increasing the amount of energy absorption, and increasing the cross section of the crash can and improving the load transmission performance from the bumper beam. Can be easily molded from the two left and right members, and the moldability can be improved.

この発明によれば、縦壁部とその上下端から車体フレーム側に向かって延びる上下壁面部から構成されるバンパビームと、先端がバンパビームの上下壁面部の間を通って縦壁部に固定されるクラッシュカンと、を備えたものにおいて、クラッシュカンは、基端からバンパビームの上下の壁面部に向かって延び少なくとも上下何れかの壁面部端部に固定される第１接続部と、該第１接続部で上下幅が縮小されバンパビームの上下壁面部の間を通って縦壁部に固定される第２接続部とを備えたので、クラッシュカンの長さを稼いで、エネルギ吸収量の増大を図りつつ、クラッシュカンの断面の大型化およびバンパビームからの荷重伝達性能の向上を図ることができる効果がある。   According to the present invention, the bumper beam composed of the vertical wall portion and the upper and lower wall surface portions extending from the upper and lower ends thereof toward the body frame side, and the tip end are fixed to the vertical wall portion through the space between the upper and lower wall surface portions of the bumper beam. The crash can includes a first connection portion that extends from the base end toward the upper and lower wall surface portions of the bumper beam and is fixed to at least one of the upper and lower wall surface portion, and the first connection. And the second connecting part that is fixed to the vertical wall part through the space between the upper and lower wall parts of the bumper beam, so that the length of the crash can is increased and the amount of energy absorption is increased. On the other hand, there is an effect that the cross section of the crash can can be enlarged and the load transmission performance from the bumper beam can be improved.

クラッシュカンの長さを稼ぎつつ、クラッシュカンの断面の大型化と、バンパビームからの荷重伝達性能の向上との両立を図るという目的を、縦壁部とその上下端から車体フレーム側に向かって延びる上下の壁面部とから構成されるバンパビームと、先端がバンパビームの上下の壁面部の間を通ってバンパビームの縦壁部に固定されるクラッシュカンと、クラッシュカンの基端からバンパビームの上下の壁面部に向かって延び少なくとも上下何れかの壁面部端部に固定される第１接続部と、第１接続部で上下幅が縮小されバンパビームの上下の壁面部の間を通って該バンパビームの縦壁部に固定される第２接続部と、を備えるという構成にて実現した。   Extending the length of the crash can from the vertical wall and its upper and lower ends toward the body frame with the aim of achieving both a larger size of the crash can and an improvement in load transmission performance from the bumper beam while increasing the length of the crash can A bumper beam composed of upper and lower wall surfaces, a crash can whose tip passes between the upper and lower wall surfaces of the bumper beam and is fixed to the vertical wall portion of the bumper beam, and upper and lower wall surfaces of the bumper beam from the base end of the crash can A first connection portion extending toward at least one of the upper and lower wall surface portions, and a vertical wall portion of the bumper beam passing through between the upper and lower wall surface portions of the bumper beam having a reduced vertical width at the first connection portion. And a second connecting portion fixed to the head.

この発明の一実施例を以下図面に基づいて詳述する。
図面は自動車のバンパ構造をリヤ側のバンパ構造に適用した実施例を示し、図１はバンパ構造を備えた自動車のリヤ側の斜視図、図２はバンパ構造を示す後面図、図３は図２のＡ−Ａ線矢視断面図、図４は図２のＢ−Ｂ線矢視断面図、図５は図２のＣ−Ｃ線矢視断面図であって、図４に示すように、リヤフロアに段下げ形成されたスペアタイヤパン１の後端部１ａには、車体後部を形成するリヤエンドパネル２を取り付けている。 An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show an embodiment in which the bumper structure of the automobile is applied to the bumper structure on the rear side, FIG. 1 is a perspective view of the rear side of the automobile having the bumper structure, FIG. 2 is a rear view showing the bumper structure, and FIG. 2 is a cross-sectional view taken along line AA in FIG. 2, FIG. 4 is a cross-sectional view taken along line BB in FIG. 2, and FIG. 5 is a cross-sectional view taken along line CC in FIG. A rear end panel 2 that forms the rear part of the vehicle body is attached to the rear end 1a of the spare tire pan 1 that is stepped down on the rear floor.

このリヤエンドパネル２は、図２に示すようにリヤゲート３（図１参照）のゲート開口４下端の車幅方向の長さと対応して車幅方向に延びるもので、該リヤエンドパネル２の上部前側には図４に示すように、リヤエンドクロスメンバ５を接合固定して、このリヤエンドクロスメンバ５とリヤエンドパネル２との間には車幅方向に延びる閉断面部６を形成している。   The rear end panel 2 extends in the vehicle width direction corresponding to the length in the vehicle width direction of the lower end of the gate opening 4 of the rear gate 3 (see FIG. 1), as shown in FIG. As shown in FIG. 4, a rear end cross member 5 is joined and fixed, and a closed cross section 6 extending in the vehicle width direction is formed between the rear end cross member 5 and the rear end panel 2.

この閉断面部６は上述のゲート開口４の下端に対応して形成されたもので、リヤエンド部の剛性を確保するためのものである。
上述のリヤエンドパネル２の後部には、図６に分解斜視図で示すように各要素から構成されるバンパレイン７が取付けられる。 The closed cross-section portion 6 is formed corresponding to the lower end of the gate opening 4 described above, and is for ensuring the rigidity of the rear end portion.
As shown in an exploded perspective view in FIG. 6, a bumper rain 7 composed of each element is attached to the rear portion of the rear end panel 2 described above.

すなわち、このバンパレイン７は、予め取付けブラケット８に接合固定された左右一対のクラッシュカン９，９（ｃｒａｓｈ−ｃａｎ）と、これら一対のクラッシュカン９，９の後端に接合されて、リヤエンドパネル２の後方を車幅方向に延びるバンパビーム１０と、このバンパビーム１０に車幅方向に渡って設けられた延出部１１と、上述のバンパビーム１０の内方に設けられ該バンパビーム１０を左右に仕切る複数の節部材１２…と、左右一対のクラッシュカン９，９の相互間においてバンパビーム１０の前側開放部を閉塞するクロージングプレート１３と、左右一対のクラッシュカン９，９の車幅方向外方においてバンパビーム１０の前側開放部を閉塞するサイドクロージングプレート１４，１４とを備えている。   That is, the bumper rain 7 is joined to a pair of left and right crash cans 9 and 9 (crash-can) that are jointly fixed to the mounting bracket 8 in advance, and to the rear end of the pair of crash cans 9 and 9. A bumper beam 10 extending rearward in the vehicle width direction, an extension portion 11 provided in the bumper beam 10 in the vehicle width direction, and a plurality of the bumper beams 10 provided inward of the bumper beam 10 to partition the bumper beam 10 left and right. A closing plate 13 that closes the front opening of the bumper beam 10 between the node member 12 ... and the pair of left and right crash cans 9, 9, and the bumper beam 10 at the outer side in the vehicle width direction of the pair of left and right crash cans 9, 9. Side closing plates 14 and 14 for closing the front opening are provided.

また、図３、図４、図５に示すようにバンパビーム１０の後端面には、ウレタン等から成る衝撃吸収部材１５（いわゆるＥＡ材）が車幅方向に渡って設けられる一方、この衝撃吸収部材１５および上述のバンパレイン７が合成樹脂製のリヤバンパフェース１６で覆われている。   As shown in FIGS. 3, 4, and 5, an impact absorbing member 15 (so-called EA material) made of urethane or the like is provided on the rear end surface of the bumper beam 10 in the vehicle width direction. 15 and the bumper rain 7 described above are covered with a synthetic resin rear bumper face 16.

なお、上述のリヤエンドパネル２の車幅方向外方には、図１、図２、図３に示すように、車体外板を構成するキャブサイドパネル１７が設けられている。   As shown in FIGS. 1, 2, and 3, a cab side panel 17 that constitutes a vehicle body outer plate is provided outside the rear end panel 2 in the vehicle width direction.

次に、図４を参照して自動車のバンパ構造における車幅方向ほぼ中央部の構成について説明する。
リヤエンドクロスメンバ５とリヤエンドパネル２とを接合して形成された上述の閉断面部６は、その後端６ａが、バンパレイン７のリヤエンドパネル取付部（図３に示す取付けブラケット８の位置参照）よりも後方に位置し、かつバンパレイン７のバンパビーム１０の前端１０ａよりもさらに後方に位置するように形成され、これにより、閉断面部６の大型化を図るように構成している。
また、上述のリヤエンドパネル２はその閉断面部６の下面が後上がりに傾斜するように形成された前低後高状の傾斜部６ｂを備えている。 Next, with reference to FIG. 4, the structure of the substantially central part in the vehicle width direction in the bumper structure of the automobile will be described.
The closed section 6 formed by joining the rear end cross member 5 and the rear end panel 2 has a rear end 6a that is more than the rear end panel mounting portion of the bumper rain 7 (see the position of the mounting bracket 8 shown in FIG. 3). It is formed so as to be located rearward and further rearward than the front end 10a of the bumper beam 10 of the bumper rain 7, and thereby the closed cross section 6 is configured to be enlarged.
Further, the rear end panel 2 described above includes an inclined portion 6b having a front-rear / rear-high shape formed so that the lower surface of the closed cross-section portion 6 is inclined rearwardly.

一方、上述のバンパビーム１０は、後端に位置する縦壁部１０ｂと、その上下両端から車体フレームとしてのリヤサイドフレーム１８（図３、図５参照、但し自動車のバンパ構造をフロント側に適用する場合には、フロントサイドフレーム）側に向かって延びる上壁面部１０ｃおよび下壁面部１０ｄとを備えて、車両前方側が開放されたコ字状断面構造に形成されると共に、該バンパビーム１０の縦壁部１０ｂにおける車幅方向中間部には前方に突出する複数条、例えば２条のビード１０ｅ，１０ｆを一体形成して、該バンパビーム１０それ自体の剛性向上を図っている。   On the other hand, the above-described bumper beam 10 includes a vertical wall portion 10b located at the rear end and a rear side frame 18 as a vehicle body frame from both upper and lower ends thereof (see FIGS. 3 and 5; however, when a bumper structure of an automobile is applied to the front side. Is provided with an upper wall surface portion 10c and a lower wall surface portion 10d extending toward the front side frame), and is formed into a U-shaped cross-sectional structure with the vehicle front side open, and the vertical wall portion of the bumper beam 10 A plurality of, for example, two, beads 10e and 10f projecting forward are integrally formed at the intermediate portion in the vehicle width direction of 10b so as to improve the rigidity of the bumper beam 10 itself.

さらに、上述の延出部１１はバンパビーム１０の後端（縦壁部１０ｂ参照）から上方に延出し、その前端１１ａがバンパビーム１０の前端１０ａから後方に間隔を隔ててバンパビーム上面部としての上壁面部１０ｃに固定されている。   Further, the above-described extending portion 11 extends upward from the rear end (see the vertical wall portion 10b) of the bumper beam 10, and its front end 11a is spaced from the front end 10a of the bumper beam 10 to the rear to form an upper wall surface as a bumper beam upper surface portion. It is fixed to the part 10c.

換言すれば、延出部１１の前端１１ａはバンパビーム１０の上壁面部１０ｃにおける前後方向中間部に固定されたものである。
さらに、詳しくは、この延出部１１は、バンパビーム後端としての縦壁部１０ｂから垂直上方に延びる垂直壁部１１ｂと、この垂直壁部１１ｂの上端から前方下方に傾斜して延びる傾斜壁部１１ｃとを備えており、バンパビーム１０と延出部１１との間には車幅方向に延びる閉断面１９が形成されている。 In other words, the front end 11 a of the extending portion 11 is fixed to the middle portion in the front-rear direction of the upper wall surface portion 10 c of the bumper beam 10.
More specifically, the extension portion 11 includes a vertical wall portion 11b extending vertically upward from a vertical wall portion 10b as a rear end of the bumper beam, and an inclined wall portion extending obliquely downward and forward from the upper end of the vertical wall portion 11b. 11c, and a closed cross section 19 extending in the vehicle width direction is formed between the bumper beam 10 and the extending portion 11.

そして、上述の延出部１１をバンパビーム１０に固定することで、バンパビーム１０の後突荷重の受け面を上方に拡大すべく構成している。
ここで、上述の延出部１１の垂直壁部１１ｂの下部と、バンパビーム１０の縦壁部１０ｂとは、スポット溶接またはビード溶接により接合固定され、延出部１１の傾斜壁部１１ｃの前端１１ａと、バンパビーム１０の上壁面部１０ｃとは、ビード溶接により接合固定される。 And it is comprised so that the receiving surface of the rear-end collision load of the bumper beam 10 may be expanded upwards by fixing the above-mentioned extension part 11 to the bumper beam 10. FIG.
Here, the lower part of the vertical wall part 11b of the extension part 11 and the vertical wall part 10b of the bumper beam 10 are joined and fixed by spot welding or bead welding, and the front end 11a of the inclined wall part 11c of the extension part 11 is fixed. And the upper wall surface part 10c of the bumper beam 10 is joined and fixed by bead welding.

しかも、図４に示すように、リヤエンドパネル２の閉断面部６と上述の延出部１１の傾斜壁部１１ｃとの間には、軽度の後突時において延出部１１の車両前方への変位を許容する前後方向の空間部２０を形成して、軽度の後突時には前方へ移動してくる延出部１１が閉断面部６に衝合することを防止して、車体側、つまり、リヤエンドパネル２が損傷するのを防止すべく構成している。   In addition, as shown in FIG. 4, between the closed cross-sectional portion 6 of the rear end panel 2 and the inclined wall portion 11c of the above-described extension portion 11, the extension portion 11 moves forward of the vehicle during a slight rear collision. By forming a space portion 20 in the front-rear direction that allows displacement, the extension portion 11 that moves forward during a slight rear collision is prevented from colliding with the closed cross-section portion 6, The rear end panel 2 is configured to be prevented from being damaged.

一方、バンパビーム１０の内方（つまり内部）に設けられた節部材１２は、バンパビーム１０に対して後突荷重が入力した時、該バンパビーム１０の平行四辺形状の変形を防止するもので、この節部材１２は、図３、図４に示すように、平板状の節部１２ａと、この節部１２ａの上端から車幅方向に折返し形成された上面固定部１２ｂと、節部１２ａの下端から車幅方向に折返し形成された下面固定部１２ｃと、節部１２ａの後端から車幅方向に折返し形成された後片部１２ｄとを有するものである。   On the other hand, the node member 12 provided inside (that is, inside) the bumper beam 10 prevents the parallelogram shape of the bumper beam 10 from being deformed when a rear impact load is input to the bumper beam 10. As shown in FIGS. 3 and 4, reference numeral 12 denotes a flat node portion 12a, an upper surface fixing portion 12b formed by folding back from the upper end of the node portion 12a in the vehicle width direction, and a vehicle width direction from the lower end of the node portion 12a. And a rear piece 12d formed by folding back from the rear end of the node 12a in the vehicle width direction.

上述の節部材１２の上面固定部１２ｂは延出部１１が設けられたバンパビーム１０の上壁面部１０ｃに該延出部１１の前端１１ａとオーバラップするように固定され、後突荷重の入力時に延出部１１に作用する荷重を該節部材１２で受けるように構成している。   The upper surface fixing portion 12b of the above-mentioned node member 12 is fixed to the upper wall surface portion 10c of the bumper beam 10 provided with the extending portion 11 so as to overlap the front end 11a of the extending portion 11, and when the rear impact load is input. The node member 12 is configured to receive a load acting on the extending portion 11.

また、上述の節部材１２の下面固定部１２ｃはバンパビーム１０の下壁面部１０ｄに固定されており、延出部１１に作用する後突荷重を、節部材１２を介してバンパビーム１０の下壁面部１０ｄに伝達して、該荷重を下壁面部１０ｄでも受けるように構成している。   Further, the lower surface fixing portion 12c of the above-described node member 12 is fixed to the lower wall surface portion 10d of the bumper beam 10, and the rear impact load acting on the extending portion 11 is applied to the lower wall surface portion of the bumper beam 10 via the node member 12. 10d and the lower wall surface portion 10d receives the load.

図４に示す構成に代えて、図７または図８に示す構成を採用してもよい。
図７示す構造は、延出部１１の傾斜壁部１１ｃの前端が、リヤエンドパネル２の閉断面部６の後端６ａよりも前方部位において上述のバンパビーム１０の上壁面部１０ｃに固定されるように、該前端に固定部１１ｄを設け、該固定部１１ｄをバンパビーム１０の上壁面部１０ｃにビード溶接したものであり、このように構成すると、閉断面１９が大きくなるので、延出部１１の剛性を向上させることができる。また、延出部１１の傾斜壁部１１ｃと対応すべく閉断面部６の下面に前低後高状の傾斜部６ｂを形成しているので、閉断面部６の大型化を図りつつ、延出部１１と該閉断面部６との干渉および接触を回避することができる。 Instead of the configuration shown in FIG. 4, the configuration shown in FIG. 7 or FIG. 8 may be adopted.
In the structure shown in FIG. 7, the front end of the inclined wall portion 11 c of the extending portion 11 is fixed to the upper wall surface portion 10 c of the bumper beam 10 at a position ahead of the rear end 6 a of the closed section 6 of the rear end panel 2. In addition, a fixing portion 11d is provided at the front end, and the fixing portion 11d is bead-welded to the upper wall surface portion 10c of the bumper beam 10. With this configuration, the closed section 19 becomes large. Stiffness can be improved. Further, since the inclined portion 6b having a front, rear, and rear height is formed on the lower surface of the closed cross-section portion 6 so as to correspond to the inclined wall portion 11c of the extension portion 11, the closed cross-section portion 6 can be enlarged while being enlarged. Interference and contact between the protruding portion 11 and the closed cross-section portion 6 can be avoided.

図８に示す構造は、延出部１１の傾斜壁部１１ｃの前端が、リヤエンドパネル２の閉断面部６の後端６ａよりも前方部位において上述のバンパビーム１０の上壁面部１０ｃにスポット溶接にて固定されるように、該前端に上壁面部１０ｃに沿う固定部１１ｄを設け、該固定部１１ｄと、上壁面部１０ｃと、節部材１２の上面固定部１２ｂとの三者をスポット溶接したものであり、このように構成しても、閉断面１９が大きくなるので、延出部１１の剛性を向上させることができる。また、延出部１１の傾斜壁部１１ｃと対応すべく閉断面部６の下面に後上がりに傾斜する傾斜部６ｂを形成しているので、閉断面部６の大型化を図りつつ、延出部１１と該閉断面部６との干渉、接触を回避することができ、さらに、節部材１２の上面固定部１２ｂが延出部１１前端の固定部１１ｄとオーバラップするので、延出部１１に作用する後突荷重を該節部材１２で受けることができる。
なお、図７、図８において、図４と同一の部分には同一符号を付して、その詳しい説明を省略している。 In the structure shown in FIG. 8, the front end of the inclined wall portion 11c of the extension portion 11 is spot-welded to the upper wall surface portion 10c of the bumper beam 10 at a position ahead of the rear end 6a of the closed section 6 of the rear end panel 2. The fixing portion 11d along the upper wall surface portion 10c is provided at the front end so that the three members of the fixing portion 11d, the upper wall surface portion 10c, and the upper surface fixing portion 12b of the node member 12 are spot-welded. Even in such a configuration, the closed section 19 becomes large, so that the rigidity of the extending portion 11 can be improved. Moreover, since the inclined part 6b which inclines back up is formed in the lower surface of the closed cross-section part 6 so as to correspond to the inclined wall part 11c of the extension part 11, it extends while aiming at enlargement of the closed cross-section part 6. Interference and contact between the portion 11 and the closed cross-section portion 6 can be avoided, and the upper surface fixing portion 12b of the node member 12 overlaps with the fixing portion 11d at the front end of the extending portion 11, so that the extending portion 11 It is possible to receive a rear impact load acting on the joint member 12.
7 and 8, the same parts as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

ところで、図３、図６において、クロージングプレート１３には複数の円形状の開口部１３ａ…を形成して、その軽量化を図る一方、該クロージングプレート１３の左右両端部には接合片１３ｂ，１３ｂを一体に折曲げ形成し、これらの各接合片１３ｂ，１３ｂをクラッシュカン９の対応部（つまり車幅方向内側の側面）にスポット溶接にて接合固定している。   3 and 6, the closing plate 13 is formed with a plurality of circular openings 13 a... To reduce the weight of the closing plate 13, and the left and right ends of the closing plate 13 are joined pieces 13 b and 13 b. Are integrally formed, and these joining pieces 13b, 13b are joined and fixed to the corresponding portion of the crash can 9 (that is, the side surface in the vehicle width direction) by spot welding.

また、図３に示すように、サイドクロージングプレート１４はクラッシュカン９の車外側の面にビード溶接にて接合固定されるが、このサイドクロージングプレート１４に接合片（図示せず）を一体に折曲げ形成して、該接合片をクラッシュカン９の対応部（つまり車幅方向外側の側面）にスポット溶接にて接合固定すべく構成してもよい。
なお、図３において、１ｂはスペアタイヤパン１の側壁部である。 Further, as shown in FIG. 3, the side closing plate 14 is bonded and fixed to the outer surface of the crash can 9 by bead welding, and a joining piece (not shown) is integrally folded to the side closing plate 14. It is also possible to bend and form the joining piece so as to be joined and fixed by spot welding to the corresponding portion of the crush can 9 (that is, the side surface in the vehicle width direction outside).
In FIG. 3, 1 b is a side wall portion of the spare tire pan 1.

一方、図３、図５に示す車体フレームとしてのリヤサイドフレーム１８はリヤフロア下面に沿って車両の前後方向に延びる車体剛性部材であって、該リヤサイドフレーム１８は前後方向に延びる閉断面２１を備えている。   On the other hand, the rear side frame 18 as the vehicle body frame shown in FIGS. 3 and 5 is a vehicle body rigid member extending in the front-rear direction of the vehicle along the lower surface of the rear floor, and the rear side frame 18 has a closed section 21 extending in the front-rear direction. Yes.

上述のリヤサイドフレーム１８の後端部は、リヤエンドブラケット２２を介してリヤエンドパネル２に取付けられており、このリヤサイドフレーム１８を前後方向で対応するように上述のクラッシュカン９が取付けられている。   The rear end portion of the rear side frame 18 is attached to the rear end panel 2 via a rear end bracket 22, and the crash can 9 is attached so as to correspond to the rear side frame 18 in the front-rear direction.

このクラッシュカン９は図９に斜視図で示すように、複数組、たとえば、３組のボルト、ナット２３を用いてリヤエンドパネル２に着脱可能に取付けられ、軽度の後突時においてバンパレイン７が損傷、破損した場合には、その交換ができるように構成されている。ここで、上述のクラッシュカン９は加工の関係上、後述する第１接続部２５と第２接続部２６とをそれぞれ備えた左右の２部材９Ｌ，９Ｒを図９の接合ライン２４で接続して構成したものである。また、図９においては車幅方向左側のクラッシュカン９を示しているが、車幅方向右側のクラッシュカン９は図６にも示すように左側のそれと略左右対称構造に形成されている。   As shown in the perspective view of FIG. 9, the crash can 9 is detachably attached to the rear end panel 2 using a plurality of groups, for example, three groups of bolts and nuts 23, and the bumper rain 7 is damaged at the time of a slight rear collision. If it is damaged, it can be replaced. Here, the above-mentioned crush can 9 is connected to the left and right two members 9L, 9R each having a first connecting portion 25 and a second connecting portion 26, which will be described later, by a joining line 24 in FIG. It is composed. Further, FIG. 9 shows the crash can 9 on the left side in the vehicle width direction, but the crash can 9 on the right side in the vehicle width direction is formed in a substantially bilaterally symmetrical structure with that on the left side as shown in FIG.

次に、図９、図１０を参照してクラッシュカン９とバンパビーム１０との接続構造について詳述する。
上述のバンパビーム１０は、縦壁部１０ｂと、上下の壁面部１０ｃ，１０ｄとを有すると共に、上壁面部１０ｃの前端には上方に指向するフランジ部１０ｇが一体に形成されており、下壁面部１０ｄの前端には下方に指向するフランジ部１０ｈが一体に形成されている。 Next, the connection structure between the crash can 9 and the bumper beam 10 will be described in detail with reference to FIGS.
The bumper beam 10 described above has a vertical wall portion 10b and upper and lower wall surface portions 10c, 10d, and a flange portion 10g directed upward is integrally formed at the front end of the upper wall surface portion 10c. A flange portion 10h directed downward is integrally formed at the front end of 10d.

上述のクラッシュカン９は図９に示すように上下幅が大きく、方形枠状断面の基部Ａと、上下幅が小さく、方形枠状断面の先端部９Ｂとを前後方向に連続して形成したエネルギ吸収部材であって、基部９Ａの前端に一体形成された接合フランジ部９ａ，９ｂが取付けブラケット８に接続されている。   As shown in FIG. 9, the above-mentioned crash can 9 has a large vertical width and a rectangular frame-shaped cross-section base A and a small vertical width and a rectangular frame-shaped cross-section tip 9B formed continuously in the front-rear direction. Joining flange portions 9 a and 9 b which are absorption members and are integrally formed at the front end of the base portion 9 </ b> A are connected to the mounting bracket 8.

しかも、図１０に示すように、クラッシュカン９の基端（つまり前端）からバンパビーム１０の上下の壁面部１０ｃ，１０ｄに向かって延び少なくとも上下いずれかの壁面部１０ｃ，１０ｄ端部（図１０の実施例では上壁面部１０ｃの前端部）に固定される第１接続部２５と、上記第１接続部２５で上下幅が縮小されバンパビーム１０の上下の壁面部１０ｃ，１０ｄの間を通ってバンパビーム１０の縦壁部１０ｂに固定される第２接続部２６と、を備えている。   Moreover, as shown in FIG. 10, at least one of the upper and lower wall surface portions 10 c, 10 d (see FIG. 10) extends from the base end (that is, the front end) of the crash can 9 toward the upper and lower wall surface portions 10 c, 10 d of the bumper beam 10. In the embodiment, the first connecting portion 25 fixed to the front end portion of the upper wall surface portion 10c and the bumper beam passing through the space between the upper and lower wall surface portions 10c and 10d of the bumper beam 10 with the vertical width reduced by the first connecting portion 25. A second connection portion 26 fixed to the ten vertical wall portions 10b.

つまり、基部９Ａと先端部９Ｂとを有するクラッシュカン９の先端部９Ｂを、車体フレームとしてのリヤサイドフレーム１８側が開放する側面視コ字状断面のバンパビーム１０内に挿入して、クラッシュカン９の前後方向の長さを稼ぎ、エネルギ吸収量の増大を図りつつ、クラッシュカン９の断面の大型化を可能としたものである。また、第１接続部２５と第２接続部２６とを備えることで、バンパビーム１０からの荷重伝達性能の向上を図るように構成したものである。   That is, the front end portion 9B of the crash can 9 having the base portion 9A and the front end portion 9B is inserted into the bumper beam 10 having a U-shaped cross-section in a side view that is opened on the rear side frame 18 side as a vehicle body frame. The cross-section of the crash can 9 can be enlarged while increasing the length of the direction and increasing the amount of energy absorption. Further, by providing the first connection portion 25 and the second connection portion 26, the load transmission performance from the bumper beam 10 is improved.

また、上述の第１接続部２５には、クラッシュカン９の基部９Ａの後端から上方に立上がるフランジ部９ｃを一体形成し、このクラッシュカン９側のフランジ部９ｃをバンパビーム１０側のフランジ部１０ｇと対向させて、両フランジ部９ｃ，１０ｇを接合固定している。   The first connecting portion 25 is integrally formed with a flange portion 9c that rises upward from the rear end of the base portion 9A of the crash can 9, and the flange portion 9c on the crash can 9 side is connected to the flange portion on the bumper beam 10 side. Both flange portions 9c and 10g are joined and fixed to face 10g.

さらに、上述の第２接続部２６には、バンパビーム１０の縦壁部１０ｂの内面に沿うように先端部９Ｂの後端四辺から複数のフランジ部９ｄ，９ｅ，９ｆ，９ｇを一体に折曲げ形成し、これらの各フランジ部９ｄ，９ｅ，９ｆ，９ｇをバンパビーム１０の縦壁部１０ｂに接合固定している。   Further, a plurality of flange portions 9d, 9e, 9f, and 9g are integrally bent from the four rear end sides of the front end portion 9B along the inner surface of the vertical wall portion 10b of the bumper beam 10 in the second connection portion 26 described above. These flange portions 9d, 9e, 9f, 9g are joined and fixed to the vertical wall portion 10b of the bumper beam 10.

図１０に示す実施例では、クラッシュカン９の基部９Ａの上下方向中心ＣＬ１に対して、延出部１１を含むバンパビーム１０の上下方向中心ＣＬ２が上下方向（この実施例では上方）にオフセットされているので、上述の第１接続部２５はバンパビーム１０がオフセットされる側つまり上側にのみ設けられており、クラッシュカン９の構造のシンプル化を図りつつ、バンパビーム１０がオフセットされる側に作用する大きい荷重を第１接続部２５と第２接続部２６とで受けることにより、オフセットされる側の変形量が大きくなるのを抑制するように構成している。   In the embodiment shown in FIG. 10, the vertical center CL2 of the bumper beam 10 including the extending portion 11 is offset in the vertical direction (upward in this embodiment) with respect to the vertical center CL1 of the base 9A of the crash can 9. Therefore, the first connecting portion 25 described above is provided only on the side to which the bumper beam 10 is offset, that is, on the upper side, and acts on the side on which the bumper beam 10 is offset while simplifying the structure of the crash can 9. By receiving the load at the first connecting portion 25 and the second connecting portion 26, the amount of deformation on the offset side is suppressed from increasing.

また、図１０に示すように、クラッシュカン９の後方に位置する上述の延出部１１の前端は、第１接続部２５の近傍にビード溶接にて固定されており、延出部１１に作用する後突荷重を効率的に第１接続部２５で受けるように構成している。
図１０に示す構成に代えて、図１１、または図１２に示す構成を採用してもよい。 Further, as shown in FIG. 10, the front end of the above-described extension portion 11 located behind the crash can 9 is fixed by bead welding in the vicinity of the first connection portion 25, and acts on the extension portion 11. The rear connection load is efficiently received by the first connecting portion 25.
Instead of the configuration shown in FIG. 10, the configuration shown in FIG. 11 or FIG. 12 may be adopted.

図１１に示す構造は、クラッシュカン９の基部９Ａ後端に、上方に立上がるフランジ部９ｃと、下方に折れ曲がるフランジ部９ｃと、をそれぞれ一体形成し、これら上下の各フランジ部９ｃ，９ｃを、バンパビーム１０の前端の上下のフランジ部１０ｇ，１０ｈにそれぞれ接合固定して、バンパビーム１０からの荷重伝達性能をさらに向上させたものである。   In the structure shown in FIG. 11, a flange portion 9 c that rises upward and a flange portion 9 c that bends downward are integrally formed at the rear end of the base portion 9 </ b> A of the crash can 9, and the upper and lower flange portions 9 c and 9 c are integrally formed. The load transmission performance from the bumper beam 10 is further improved by joining and fixing to the upper and lower flange portions 10g and 10h at the front end of the bumper beam 10, respectively.

また、図１１に示すようにクラッシュカン９側の上下にそれぞれフランジ部９ｃ，９ｃを設け、これら各フランジ部９ｃ，９ｃをバンパビーム１０側の上下のフランジ部１０ｇ，１０ｈに接続すると、図１０の実施例に対してクラッシュカン９の基部９Ａの断面をさらに大きく形成することができる。つまり、クラッシュカン９の断面をより一層大型化することができる。   Further, as shown in FIG. 11, when flange portions 9c and 9c are respectively provided on the upper and lower sides of the crash can 9 side and these flange portions 9c and 9c are connected to the upper and lower flange portions 10g and 10h on the bumper beam 10 side, The cross section of the base portion 9A of the crash can 9 can be made larger than that of the embodiment. That is, the cross section of the crash can 9 can be further increased in size.

図１２に示す構造は、クラッシュカン９側のフランジ部９ｃと、バンパビーム１０側のフランジ部１０ｇ，１０ｈとを省略すると共に、クラッシュカン９の基部９Ａ後端に段差形状の第１接続部２５を形成して、この第１接続部２５に対して、バンパビーム１０の上壁面部１０ｃ前端、下壁面部１０ｄ前端をビード溶接またはスポット溶接にて接合固定して、構造の簡素化を図ったものである。   The structure shown in FIG. 12 omits the flange portion 9c on the crush can 9 side and the flange portions 10g and 10h on the bumper beam 10 side, and a step-shaped first connection portion 25 at the rear end of the base portion 9A of the crash can 9. The front end of the upper wall surface portion 10c and the front end surface of the lower wall surface portion 10d of the bumper beam 10 are joined and fixed to the first connection portion 25 by bead welding or spot welding to simplify the structure. is there.

なお、図１１、図１２において、図１０と同一の部分には同一符号を付して、その詳しい説明を省略している。また、図中、矢印Ｆは車両前方を示し、矢印Ｒは車両後方を示す。   11 and 12, the same parts as those in FIG. 10 are denoted by the same reference numerals, and detailed description thereof is omitted. In the figure, arrow F indicates the front of the vehicle, and arrow R indicates the rear of the vehicle.

このように上記実施例の自動車のバンパ構造は、縦壁部１０ｂとその上下端から車体フレーム（リヤサイドフレーム１８参照）側に向かって延びる上下の壁面部１０ｃ，１０ｄとから構成されるバンパビーム１０と、先端（この実施例では後端）がバンパビーム１０の上下の壁面部１０ｃ，１０ｄの間を通ってバンパビーム１０の縦壁部１０ｂに固定されるクラッシュカン９と、クラッシュカン９の基端からバンパビーム１０の上下の壁面部１０ｃ，１０ｄに向かって延び少なくとも上下何れかの壁面部１０ｃ端部に固定される第１接続部２５と、第１接続部２５で上下幅が縮小されバンパビーム１０の上下の壁面部１０ｃ，１０ｄの間を通って該バンパビーム１０の縦壁部１０ｂに固定される第２接続部２６と、を備えたものである（図１０、図１１、図１２参照）。
この構成によれば、バンパビーム１０は縦壁部１０ｂと上下の壁面部１０ｃ，１０ｄとを備えて、車体フレーム（リヤサイドフレーム１８参照）側が開放したコ字状断面構造を有しており、クラッシュカン９の第２接続部２６は第１接続部２５でその上下幅が縮小されてバンパビーム１０の上下の壁面部１０ｃ，１０ｄの間を通って該バンパビーム１０の縦壁部１０ｂに固定されるので、クラッシュカン９の長さを稼ぎ、エネルギ吸収量の増大を図ることができる。 As described above, the bumper structure of the automobile of the above embodiment includes the bumper beam 10 including the vertical wall portion 10b and the upper and lower wall surface portions 10c and 10d extending from the upper and lower ends thereof toward the vehicle body frame (see the rear side frame 18). The crush can 9 whose front end (rear end in this embodiment) passes between the upper and lower wall surface portions 10c and 10d of the bumper beam 10 and is fixed to the vertical wall portion 10b of the bumper beam 10, and the bumper beam from the base end of the crush can 9 A first connecting portion 25 that extends toward the upper and lower wall surface portions 10c and 10d and is fixed to at least one of the upper and lower wall surface portions 10c; And a second connecting portion 26 that is fixed to the vertical wall portion 10b of the bumper beam 10 through the wall surface portions 10c and 10d (FIG. 1). , See FIG. 11, FIG. 12).
According to this configuration, the bumper beam 10 includes the vertical wall portion 10b and the upper and lower wall surface portions 10c and 10d, and has a U-shaped cross-sectional structure in which the vehicle body frame (see the rear side frame 18) side is open. 9, the second connecting portion 26 is fixed to the vertical wall portion 10 b of the bumper beam 10 through the space between the upper and lower wall surface portions 10 c and 10 d of the bumper beam 10. The length of the crash can 9 can be increased, and the amount of energy absorption can be increased.

また、クラッシュカン９の基端（この実施例では前端）からバンパビーム１０の上下の壁面部１０ｃ，１０ｄに向かって延びる第１接続部２５は、第２接続部２６に対してその上下幅が必然的に大きく形成されることになり、かつクラッシュカン９のこれら第１接続部２５、第２接続部２６とバンパビーム１０とが固定されているので、クラッシュカン９の断面の大型化を図ってクラッシュカン９によるバンパビーム１０の受けが安定すると共に、バンパビーム１０からクラッシュカン９への荷重伝達性能の向上を図ることができる。   Further, the first connecting portion 25 extending from the base end (the front end in this embodiment) of the crash can 9 toward the upper and lower wall surface portions 10c and 10d of the bumper beam 10 inevitably has a vertical width with respect to the second connecting portion 26. Since the first connecting portion 25 and the second connecting portion 26 of the crash can 9 and the bumper beam 10 are fixed, the cross-section of the crash can 9 is increased in size and crashed. The receiving of the bumper beam 10 by the can 9 is stabilized, and the load transmission performance from the bumper beam 10 to the crash can 9 can be improved.

さらに、上記バンパビーム１０の壁面部（図１０の壁面部１０ｃ、図１１の各壁面部１０ｃ，１０ｄ参照）に形成されたバンパビーム１０側のフランジ部１０ｇ，１０ｈと、上記クラッシュカン９の第１接続部２５に形成されバンパビーム１０側のフランジ部１０ｇ，１０ｈと対向して該フランジ部１０ｇ，１０ｈに接合されるクラッシュカン９側のフランジ部９ｃ，９ｃと、を備えたものである（図１０、図１１参照）。
この構成によれば、バンパビーム１０側のフランジ部１０ｇ，１０ｈと、クラッシュカン９側のフランジ部９ｃとの両フランジ部同士を接合させたので、効率的に衝突荷重を受けることができる。 Further, flange portions 10g and 10h on the bumper beam 10 side formed on the wall surface portion of the bumper beam 10 (see the wall surface portion 10c in FIG. 10 and the wall surface portions 10c and 10d in FIG. 11) and the first connection of the crash can 9 And a flange portion 9c, 9c on the side of the crash can 9 that is formed on the portion 25 and is joined to the flange portions 10g, 10h facing the flange portions 10g, 10h on the bumper beam 10 side (FIG. 10, FIG. 10). FIG. 11).
According to this configuration, since the flange portions 10g and 10h on the bumper beam 10 side and the flange portion 9c on the crash can 9 side are joined to each other, a collision load can be efficiently received.

しかも、上記クラッシュカン９の上下方向中心ＣＬ１に対して、上記バンパビーム１０の上下方向中心（延出部１１を含むバンパビーム１０の上下方向中心）ＣＬ２が上下方向にオフセットされ、上記第１接続部２５はバンパビーム１０がオフセットされる側にのみ設けられたものである（図１０参照）。
この構成によれば、バンパビーム１０がオフセットされる側（この実施例では上側）には大きな衝突荷重が作用するが、この片寄った荷重を第１接続部２５と第２接続部２６とで受けるので、オフセットされる側の変形量が大きくなるのを抑制することができ、また第１接続部２５はバンパビーム１０がオフセットされる側にのみ設けるので、構造的にもシンプルとなる。 In addition, the vertical center (the vertical center of the bumper beam 10 including the extending portion 11) CL2 of the bumper beam 10 is offset in the vertical direction with respect to the vertical center CL1 of the crash can 9, and the first connecting portion 25 Is provided only on the side where the bumper beam 10 is offset (see FIG. 10).
According to this configuration, a large collision load acts on the side where the bumper beam 10 is offset (the upper side in this embodiment), but the offset load is received by the first connection portion 25 and the second connection portion 26. It is possible to suppress an increase in the amount of deformation on the offset side, and the first connecting portion 25 is provided only on the side where the bumper beam 10 is offset.

加えて、上記バンパはリヤバンパであり、リヤエンドパネル２と、該リヤエンドパネル２のゲート開口４（図２参照）下端に対応して形成され、かつ後端６ａがバンパビーム１０の前端１０ａより後方に位置する閉断面部６と、バンパビーム１０の後端から上方に延出し、その前端１１ａが該バンパビーム１０の前端１０ａから間隔を隔ててバンパビーム上面部（上壁面部１０ｃ参照）に固定された延出部１１とを備え、上記第１接続部２５はクラッシュカン９の上部側にのみ形成されたものである（図４、図１０参照）。
この構成によれば、バンパビーム１０に設けた延出部１１と対応して上記第１接続部２５をクラッシュカン９の上部側にのみ形成したので、クラッシュカン９の上部の変形量をその下部側と略均等に成すことができ、またバンパビーム１０には上述の延出部１１を設けたので、該バンパビーム１０の衝突荷重の受け面を上方に拡大することができ、さらに、リヤエンドパネル２にはその後端６ａがバンパビーム１０の前端１０ａよりも後方に位置する閉断面部６を設け、この閉断面部６と干渉しないように延出部１１の前端をバンパビーム１０の前端１０ａから間隔を隔ててバンパビーム上面部（上壁面部１０ｃ参照）に固定したので、リヤエンドパネル２の閉断面部６の大型化を図って、リヤエンド部の車体剛性向上を図ることができる。 In addition, the bumper is a rear bumper, which is formed corresponding to the rear end panel 2 and the lower end of the gate opening 4 (see FIG. 2) of the rear end panel 2, and the rear end 6 a is located behind the front end 10 a of the bumper beam 10. A closed cross-section portion 6 that extends upward from the rear end of the bumper beam 10, and a front end 11 a that is fixed to the bumper beam upper surface portion (see the upper wall surface portion 10 c) at a distance from the front end 10 a of the bumper beam 10. 11 and the first connecting portion 25 is formed only on the upper side of the crash can 9 (see FIGS. 4 and 10).
According to this configuration, since the first connecting portion 25 is formed only on the upper side of the crash can 9 corresponding to the extending portion 11 provided on the bumper beam 10, the amount of deformation of the upper portion of the crash can 9 is reduced to the lower side. Since the bumper beam 10 is provided with the above-described extending portion 11, the impact load receiving surface of the bumper beam 10 can be enlarged upward. The rear end 6a is provided with a closed cross-section portion 6 positioned behind the front end 10a of the bumper beam 10, and the front end of the extension portion 11 is spaced from the front end 10a of the bumper beam 10 so as not to interfere with the closed cross-section portion 6. Since it is fixed to the upper surface portion (see the upper wall surface portion 10c), the closed end section 6 of the rear end panel 2 can be increased in size, and the vehicle body rigidity of the rear end portion can be improved.

また、上記クラッシュカン９後方に位置する延出部１１の前端が第１接続部２５の近傍に固定されたものである（図１０参照）。
この構成によれば、延出部１１の前端は第１接続部２５の近傍に固定されているので、延出部１１に作用する衝突荷重を第１接続部２５で効率的に受けることができる。 Moreover, the front end of the extension part 11 located behind the crash can 9 is fixed in the vicinity of the first connection part 25 (see FIG. 10).
According to this configuration, since the front end of the extension part 11 is fixed in the vicinity of the first connection part 25, the first connection part 25 can efficiently receive a collision load acting on the extension part 11. .

さらに、上記クラッシュカン９は、第１接続部２５と第２接続部２６とをそれぞれ備えた左右の２部材９Ｌ，９Ｒを接合して構成されたものである。
この構成によれば、クラッシュカン９の長さを稼ぎ、エネルギ吸収量の増大を図りつつ、クラッシュカン９の断面の大型化およびバンパビーム１０からの荷重伝達性能の向上を図るという効果を備えて成る該クラッシュカンを左右の２部材９Ｌ，９Ｒから容易に成形加工することができ、成形性の向上を図ることができる。 Further, the crash can 9 is configured by joining two left and right members 9L and 9R each having a first connecting portion 25 and a second connecting portion 26.
According to this configuration, the length of the crash can 9 is increased, the amount of energy absorption is increased, and the cross section of the crash can 9 is increased in size and the load transmission performance from the bumper beam 10 is improved. The crush can can be easily molded from the left and right members 9L and 9R, and the moldability can be improved.

図１３はリヤエンドパネル２の閉断面部６の他の実施例を示し、図４で示した構成においては前側に位置するリヤエンドクロスメンバ５と、後側に位置するリヤエンドパネル２とで上記閉断面部６を形成したが、これは図１３に示すように前後逆の構造を採用してもよい。つまり、図１３では前側に位置するリヤエンドパネル２と、後側に位置するリヤエンドクロスメンバ５とで閉断面部６を形成したものである。   FIG. 13 shows another embodiment of the closed section 6 of the rear end panel 2. In the configuration shown in FIG. 4, the closed section is composed of the rear end cross member 5 positioned on the front side and the rear end panel 2 positioned on the rear side. Although the portion 6 is formed, a reverse structure may be adopted as shown in FIG. That is, in FIG. 13, the closed end section 6 is formed by the rear end panel 2 positioned on the front side and the rear end cross member 5 positioned on the rear side.

このように構成しても、その他の構成、作用、効果については図４の実施例と同様であるから、図１３において図４と同一の部分には同一符号を付して、その詳しい説明を省略する。   Even in this configuration, the other configurations, operations, and effects are the same as those in the embodiment of FIG. 4. Therefore, in FIG. 13, the same parts as those in FIG. Omitted.

この発明の構成と、上述の実施例との対応において、
この発明の車体フレームは、実施例のリヤサイドフレーム１８に対応するも、
この発明は、上述の実施例の構成のみに限定されるものではない。
すなわち、請求項１〜３に記載の構成はフロントバンパ構造、リヤバンパ構造の何れに適用してもよい。 In the correspondence between the configuration of the present invention and the above-described embodiment,
The vehicle body frame of the present invention corresponds to the rear side frame 18 of the embodiment,
The present invention is not limited to the configuration of the above-described embodiment.
That is, the structure of Claims 1-3 may be applied to any of a front bumper structure and a rear bumper structure.

バンパ構造を備えた自動車のリヤ側の斜視図Rear side perspective view of an automobile with a bumper structure 自動車のバンパ構造を示す後面図Rear view showing the bumper structure of an automobile 図２のＡ−Ａ線矢視断面図2 is a cross-sectional view taken along line AA in FIG. 図２のＢ−Ｂ線矢視断面図2 is a cross-sectional view taken along line BB in FIG. 図２のＣ−Ｃ線矢視断面図CC sectional view taken on line CC in FIG. バンパレインの分解斜視図Exploded perspective view of bumper rain バンパ構造の他の実施例を示す断面図Sectional view showing another embodiment of the bumper structure バンパ構造のさらに他の実施例を示す断面図Sectional view showing still another embodiment of the bumper structure クラッシュカンの拡大斜視図Enlarged perspective view of the crash can 図５の要部拡大断面図The principal part expanded sectional view of FIG. クラッシュカン接続構造の他の実施例を示す断面図Sectional drawing which shows the other Example of a crash can connection structure クラッシュカン接続構造のさらに他の実施例を示す断面図Sectional drawing which shows the further another Example of a crash can connection structure 閉断面部の構造の他の実施例を示す断面図Sectional drawing which shows the other Example of the structure of a closed cross-section part

符号の説明Explanation of symbols

２…リヤエンドパネル
４…ゲート開口
６…閉断面部
６ａ…後端
９…クラッシュカン
９ｃ…フランジ部
１０…バンパビーム
１０ｂ…縦壁部
１０ｃ…上壁面部
１０ｄ…下壁面部
１０ｇ…フランジ部
１１…延出部
１８…リヤサイドフレーム（車体フレーム）
２５…第１接続部
２６…第２接続部 2 ... Rear end panel 4 ... Gate opening 6 ... Closed section 6a ... Rear end 9 ... Crash can 9c ... Flange part 10 ... Bumper beam 10b ... Vertical wall part 10c ... Upper wall part 10d ... Lower wall part 10g ... Flange part 11 ... Extension Exit 18 ... Rear side frame (body frame)
25 ... 1st connection part 26 ... 2nd connection part

Claims (6)

自動車のバンパ構造であって、
縦壁部とその上下端から車体フレーム側に向かって延びる上下の壁面部とから構成されるバンパビームと、
先端がバンパビームの上下の壁面部の間を通ってバンパビームの縦壁部に固定されるクラッシュカンと、
クラッシュカンの基端からバンパビームの上下の壁面部に向かって延び少なくとも上下何れかの壁面部端部に固定される第１接続部と、
第１接続部で上下幅が縮小されバンパビームの上下の壁面部の間を通って該バンパビームの縦壁部に固定される第２接続部と、
を備えた
自動車のバンパ構造。 The bumper structure of the car,
A bumper beam composed of a vertical wall portion and upper and lower wall surface portions extending from the upper and lower ends thereof toward the body frame side;
A crash can whose tip is fixed to the vertical wall portion of the bumper beam through the upper and lower wall portions of the bumper beam;
A first connection portion extending from the base end of the crash can toward the upper and lower wall surface portions of the bumper beam and fixed to at least one of the upper and lower wall surface portion portions;
A second connection portion that is reduced in vertical width at the first connection portion and passes between the upper and lower wall surface portions of the bumper beam and is fixed to the vertical wall portion of the bumper beam;
Bumper structure of a car equipped with 上記バンパビームの壁面部に形成されたバンパビーム側のフランジ部と、
上記クラッシュカンの第１接続部に形成されバンパビーム側のフランジ部と対向して該フランジ部に接合されるクラッシュカン側のフランジ部と、
を備えた
請求項１記載の自動車のバンパ構造。 A bumper beam side flange formed on the wall surface of the bumper beam;
Crash can-side flange portion formed on the first connection portion of the crash can and facing the flange portion on the bumper beam side;
The automobile bumper structure according to claim 1, further comprising: 上記クラッシュカンの上下方向中心に対して、上記バンパビームの上下方向中心が上下方向にオフセットされ、
上記第１接続部はバンパビームがオフセットされる側にのみ設けられた
請求項１または２記載の自動車のバンパ構造。 The vertical center of the bumper beam is offset in the vertical direction with respect to the vertical center of the crash can.
The automobile bumper structure according to claim 1, wherein the first connection portion is provided only on a side where the bumper beam is offset. 上記バンパはリヤバンパであり、
リヤエンドパネルと、
該リヤエンドパネルのゲート開口下端に対応して形成され、かつ後端がバンパビーム前端より後方に位置する閉断面部と、
バンパビームの後端から上方に延出し、その前端が該バンパビームの前端から間隔を隔ててバンパビーム上面部に固定された延出部とを備え、
上記第１接続部はクラッシュカンの上部側にのみ形成された
請求項３記載の自動車のバンパ構造。 The above bumper is a rear bumper,
A rear end panel;
A closed cross-sectional portion formed corresponding to the lower end of the gate opening of the rear end panel and having a rear end located behind the front end of the bumper beam;
Extending upward from the rear end of the bumper beam, and the front end of the bumper beam includes an extension portion fixed to the upper surface portion of the bumper beam at a distance from the front end of the bumper beam;
4. The automobile bumper structure according to claim 3, wherein the first connection portion is formed only on an upper side of the crash can. 上記クラッシュカン後方に位置する延出部の前端が第１接続部の近傍に固定された
請求項４記載の自動車のバンパ構造。 The automobile bumper structure according to claim 4, wherein a front end of the extension portion located behind the crash can is fixed in the vicinity of the first connection portion. 上記クラッシュカンは、第１接続部と第２接続部とをそれぞれ備えた左右の２部材を接合して構成された
請求項１〜５の何れか１に記載の自動車のバンパ構造。 The automobile bumper structure according to any one of claims 1 to 5, wherein the crash can is configured by joining two left and right members each having a first connection portion and a second connection portion.
JP2006262230A 2006-09-27 2006-09-27 Automotive bumper structure Expired - Fee Related JP5061557B2 (en)

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KR101033003B1 (en) * 2008-10-14 2011-05-09 한국 한의학 연구원 A composition comprising Broussonetiae Fructus for immunopotentiating
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