JP3956845B2

JP3956845B2 - Automotive bumper structure

Info

Publication number: JP3956845B2
Application number: JP2002373383A
Authority: JP
Inventors: 孝雄松本; 有洋古本
Original assignee: Mazda Motor Corp
Current assignee: Mazda Motor Corp
Priority date: 2002-12-25
Filing date: 2002-12-25
Publication date: 2007-08-08
Anticipated expiration: 2022-12-25
Also published as: JP2004203157A

Description

【０００１】
【発明の属する技術分野】
本発明は、自動車のバンパー構造に関するものである。
【０００２】
【従来の技術】
自動車のバンパー構造に関しては、図７（Ａ）及びそのＹ９−Ｙ９断面視図である図７（Ｂ）に示した構造を有する下記文献１が知られている。この構造は、その後端部がフロントサイドフレーム（図示しない）に取付けプレート１３６を介して支持され湾曲しながらバンパフェイスアンダ１２６の後方に向かって延びる左右のブラケット本体１３５と、これら左右のブラケット本体１３５に取付板１３２を介してそれらの間に結合された中空体１５０と、中空体の前面に形成された縦リブ１５２、横リブ１５１等で構成されたものである。
【０００３】
しかしながら、この構造では、部品点数が多いため、組付け性が悪く、また、締結部位が多くなることから、これに伴って多くの締結部品が必要となり、生産コストが高くなる。
【０００４】
また、この構造によれば、歩行者等との衝突時、その歩行者等を車体の下側に巻き込むことが防止できるとされているが、バンパフェイスアンダ１２６の裏面部（後方）には縦リブ１５２、横リブ１５１が前方に向かって突出した形状で形成されているため、バンパフェイスアンダ１２６がその前部に設けられているものの、衝突された歩行者等の体の衝突部位にはリブ先端部による衝撃力が集中的に加わることとなり、衝突部位の損傷度合いは大きくなることが考えられる。
【０００５】
【特許文献１】
特開２００２−２０５６１３号公報
【０００６】
【発明が解決しようとする課題】
以上から、本発明は部品点数増加を抑制し、組付け性向上及びコストアップを抑制する、自動車のバンパー構造を提供することを第一の課題とし、さらに、車両が歩行者等（本発明においては、通常の歩行者に加え、自転車や二輪車に乗っている乗員も含め、車両に直接衝突する人を歩行者等と呼ぶ。）と衝突した際に、歩行者等を車両の下側に巻き込むことなく、歩行者等の人身ダメージが増大するのを防止できる自動車のバンパー構造を提供することを第二の課題とする。
【０００７】
【課題を解決するための手段】
本発明に関わる自動車のバンパー構造の第一の構成は、バンパーフェースに外気導入用の開口部を有し、開口部より下方にあってバンパーフェースの一部を構成するバンパーロアフェース後内方に補強部材を備える自動車のバンパー構造であって、開口部に後方側からバンパーフェースとは別体のグリルが取付けられ、補強部材はグリルの少なくとも一部と連結されてバンパーロアフェース後内方に配設されているものである。
【０００８】
この構成によれば、従来技術で示したようなブラケット等、補強部材専用の取付け部材が不要となり、コストアップ抑制や組付け性向上を図りつつ、バンパー下部に補強部材を配設でき、車両が歩行者等と衝突した際、補強部材より後方、即ち、車両下部に歩行者等を巻き込むのを回避することができる。
【０００９】
さらに、補強部材はグリルに連結されているので、バンパーロアフェースの裏面に補強部材取付けのための取付座を設ける必要が無い。その結果、バンパーロアフェース表面にはヒケが発生せず、見栄えを損なうことも無い。
【００１０】
加えて、上記第一の構成は、バンパーロアフェースは、開口部より一旦前方に突出し、下方に向かうに従って後方に後退する形状に形成され、補強部材は、バンパーロアフェースの後内方に収まるような上面部、前面部、下面部とを有し、上面部、前面部、下面部とに渡って縦リブが形成されているものである。
【００１１】
この構成によれば、縦リブによって補強部材の下面部、前面部、並びに上面部が立体的に連結されることになるので補強部材の強度、剛性が向上し、その結果として、歩行者等を車両下部に巻き込む状態を回避することができる。
【００１２】
また、上記構成によれば、縦リブの前方側先端部は補強部材の前面部と繋がり、その前面部は、バンパーロアフェースの形状に沿った車幅方向に延びる形状とされるため、補強部材前面側が縦リブによって部分的に突出した形状とされることが防止され、補強部材のリブに衝撃力が集中的に加わることによる歩行者等の人身ダメージの増大を防止することが可能となる。
【００１３】
さらに上記構成によれば、上記のような強度、剛性が向上した構造を有する補強部材がバンパーロアフェースの後内方に収まっているので、低荷重入力によるバンパーロアフェースの前方への突出した部分の潰れを防止することができる。
【００１４】
本発明に関わる第二の構成は、補強部材は上記グリルと一体成形により連結されているものである。
【００１５】
第二の構成によれば、補強部材がグリルと一体成形されるため、補強部材専用の部品が不要となり、コストアップ抑制や組付け性向上を図りつつ、バンパー下部に補強部材を配設できる。
【００１６】
本発明に関わる第三の構成は、グリルとその下部に配設される補強部材との境界部に係合孔が備えられているとともに、バンパーロアフェース上端に後方に延びる爪が備えられ、爪と係合孔が係合されているものである。
【００１７】
第三の構成によれば、爪と係合孔とを係合するだけで補強部材のバンパーフェースへの支持とグリルのバンパーフェースへの支持が両立できるので、組付け性が向上でき、さらにはバンパーフェースに設けられた開口部に対するグリルの合沿いが向上できて見栄えが良くなる。
【００１８】
本発明に関わる第四の構成は、補強部材の下面部がバンパーロアフェースの下面部に締結されているものである。
【００１９】
第四の構成によれば、補強部材の下面部とバンパーロアフェースの下面部との締結強度が向上でき、構造的にさらに強度、剛性が向上するので、上記第一の構成による効果をより一層奏することができる。
【００２０】
本発明に関わる第五の構成は、補強部材の下面部後端に厚肉部が形成され、厚肉部はバンパーロアフェースの下面部後端に締結されているとともに、厚肉部の前方に位置する補強部材の下面部は上方に向かって窪んだ補強凹部が形成されているものである。
【００２１】
第五の構成によれば、厚肉部の前方に位置する補強部材の下面部は平面ではなく、立体的な補強凹部とされるため、補強部材の下面部後端とバンパーロアフェースの下面部後端との締結部近傍の剛性が向上でき、その結果、歩行者等との衝突時に補強部材の下面部後端とバンパーロアフェースの下面部後端との締結部近傍が破壊されて歩行者等が巻き込まれやすくなる状態を回避することができる。
【００２２】
本発明に関わる第六の構成は、補強部材は、車幅方向左右端両側から夫々後方に延びる側面部を有しているとともに、これら左右の側面部と前面部とに渡って縦リブに略直交する横リブが形成されているものである。
【００２３】
第六の構成によれば、補強部材は左右に側面部を有し、これら左右側面部から横リブを有した構造とされるため、補強部材の強度、剛性が向上し、低荷重入力による補強部材の車幅方向の折れを防止することができる。
【００２４】
また、第六の構成によれば、横リブの前方側先端部は補強部材の前面部と繋がり、その前面部は、バンパーロアフェースの形状に沿った車幅方向に延びる形状とされるため、補強部材前面側が横リブによって部分的に突出した形状とされることが防止され、補強部材のリブに衝撃力が集中的に加わることによる歩行者等の人身ダメージの増大を防止することが可能となる。
【００２５】
本発明に関わる第七の構成は、横リブの一部に更に後方に延びる延長部が設けられ、延長部にはグリルより後方に搭載された車両部品が保持されているものである。
【００２６】
第七の構成によれば、延長部の形成によって、グリルより後方に搭載された部品を取付けるための別部材が不要となるため、部品点数、並びに組付け工数の削減ができる。
【００２７】
本発明に関わる第八の構成は、バンパーロアフェースの下面部とバンパーより後方に配設されている車両構造体とを車幅方向に渡って連結するアンダーカバーが設けられているものである。
【００２８】
第八の構成によれば、バンパーロアフェースの下面部は、その後方に配設されている車両構造体と車幅方向に渡って連結した構造とされるため、補強部材の支持剛性向上とともにバンパー自体の支持剛性も同時に向上できる。
【００２９】
【発明の効果】
以上から、本発明によれば、部品点数増加を抑制できるため、組付け性の向上及びコストアップを抑制できる自動車のバンパー構造を提供することができ、さらに、車両が歩行者等と衝突した際に、歩行者等を車両の下側に巻き込むことなく、且つこのような巻き込みを防止するバンパー下方部の補強構造部位によって歩行者等の人身ダメージが増大するのを防止できる自動車のバンパー構造を提供することができる。
【００３０】
【発明の実施の形態】
以下、本発明の実施の形態について、図１〜図６に基づいて説明する。まず、図１は本発明に関わる自動車のバンパー構造体の正面図である。バンパー構造体１はバンパーフェース２、グリル１０、及び衝突時のエネルギーを吸収するクラッシュカン６やバンパーレインフォースメント８等から構成され、車体前部に組付けられている。バンパーフェース２は、クラッシュカン６やバンパーレインフォースメント８がその後面側に配置されるバンパーアッパフェース２ａとバンパーロアフェース２ｂとともに射出成形により一体的に成形されており、バンパーアッパフェース２ａとバンパーロアフェース２ｂとの間には車幅方向に長い開口部４が形成され、開口部４には格子状に成形されて外気をエンジンルーム側に導入するグリル１０が後面側から挿入、固定されている。
【００３１】
次に、グリル１０についてその正面図である図２、及びその後面斜視図である図３（一部の格子省略）を用いて説明する。図２と図３に示しているように、グリル１０は、格子状に成形された格子部１２と、その周縁部１４、及び格子部１２の下側の周縁部１４から垂下して車幅方向に延びる補強部材２０が一体的に形成され、さらに周縁部１４において、格子部１２より上側と下側に、夫々、複数の係合孔１６、係合孔１８が設けられている。これらの係合孔はグリル１０をバンパーフェース２の開口部４に挿入、係合するためのもので、後で詳細に説明する。
【００３２】
また、図３に示しているように、グリル１０における補強部材２０の後面側の構造は、歩行者等が車両の下側に巻き込まれるのを防止すべく、補強部材の強度、剛性を向上するための複数のリブ等が設けられたものとなっている。
【００３３】
補強部材２０は、開口部４より一旦車両前方に突出し、下方に向かうに従って後方に後退する形状に形成されている。即ち、補強部材２０は、バンパーロアフェース２ｂの後内方においてそのバンパーロアフェース２ｂの形状に略沿って収まるよう車両前方に向かって延びる上面部２４（図４（Ａ）参照）と、上面部２４から下方に向かって延びる前面部２６（図４（Ａ）参照）、及び前面部２６から後方に向かって延びる下面部２８とを有している。そして、これら側面部２２、上面部２４、前面部２６、及び下面部２８とによって外面枠が形成され、側面部２２を結ぶ横リブ３０が前面部２６から後方に向かって延び、さらに上面部２４と前面部２６と下面部２８とを結び、横リブ３０と略直交する複数の縦リブ３２が形成された構造を有している。なお、図３、４では横リブは１本としているが、複数本設けられても良い。
【００３４】
補強部材２０はこのような強度、剛性の高い構造を有しているため、車両が歩行者等と衝突した際でも容易に屈曲、破断することがなく、従って歩行者等が車両の下側に巻き込まれるのを防止できる。
【００３５】
また、横リブ３０と縦リブ３２の前方部には、前面部２６が車幅方向に渡って一体的に形成されているため、従来技術で示したような衝突された歩行者等の体の衝突部位へのリブ先端部による衝撃力の集中が防止でき、衝突部位の損傷度合いを低減可能である。
【００３６】
次に、グリル１０とバンパーフェース２の連結構造について、その断面を示す図４を用いて説明する。図４（Ａ）は、図３におけるＡ−Ａ断面部のグリル１０にバンパーフェース２を連結した状態を示す図、図４（Ｂ）は、図３におけるＢ−Ｂ断面部のグリル１０にバンパーフェース２を連結した状態を示す図である。
【００３７】
図４（Ａ）に示しているように、バンパーアッパフェース２ａとバンパーロアフェース２ｂの間には開口部４が形成され、グリル１０の格子部１２が後方側から挿入されている。開口部４より下方のバンパーロアフェース２ｂは、上記開口より一旦前方に突出し、下方に向かうに従って後方に後退する形状に形成され、略水平なバンパーロアフェース下面部２ｄまで延びている。
【００３８】
先に述べたように、グリル１０は格子部１２と補強部材２０が一体で成形されており、補強部材２０はバンパーロアフェース２ｂの後部に収まるような形状を有している。即ち、格子部１２のやや下方位置から一旦車両前方に突出する上面部２４と、上面部２４から下方に延びる前面部２６と、さらに下方に向かうに従って後方に延びる下面部２８が形成され、且つ、図３に示している側面部２２に、これら上面部２４、前面部２６、下面部２８が一体的に繋がっている。
【００３９】
また、下面部２８は後方に複数の肉厚部３４が形成され（図３参照）、バンパーロアフェース下面部２ｄと連結部材３６で締結されている。なお、バンパーロアフェース下面部２ｄにおいて下方へ延びる垂下部２ｆは、空力特性、及び車両前方からの外観を向上し、更には走行時の飛び石等により締結部材や締結部付近が損傷したりするのを防止する効果を有している。
【００４０】
この肉厚部３４に至る補強部材の下面部２８は、図４（Ａ）のＣ−Ｃ断面を示す図４（Ｃ）から分かるように、上部方向に向かって窪んだ補強凹部２８ａを有している。つまり下面部２８は、バンパーロアフェース下面部２ｄとの締結部である肉厚部の前方部で三方に壁を有する立体的構造を有しているため、衝突時において締結部付近が容易に破壊しない高強度構造とされている。
【００４１】
以上、バンパーロアフェース２ｂの下方部と補強部材２０との締結構造について説明したが、次にバンパーロアフェース２ｂの上方部と補強部材２０との締結構造について、図３における挿通孔１８を含むＢ−Ｂ断面部のグリル１０にバンパーフェース２を連結した状態を示す図である図４（Ｂ）に基づいて説明する。
【００４２】
面Ｂ−Ｂにおいては、断面Ａ−Ａと異なり、補強部材２０における下面部２８の後方に肉厚部３４が形成されておらず、従ってバンパーロアフェース下面部２ｄと締結されていない。しかし、補強部材２０の上方に形成された周縁部１４に係合孔１８が設けられ、係合孔１８にはバンパーロアフェース２ｂの上面部２ｅから後方に延びる爪部２ｃが挿通されるとともに、爪部２ｃは周縁部１４の後端の爪係合部１４ａと係合している。
【００４３】
以上の説明から分かるように、グリル１０は、バンパーフェース２の開口部４に対して格子部１２を、また爪部２ｃに対して係合孔１８を位置合せしながら、バンパーフェース２の後方側から嵌め込まれ、補強部材２０の肉厚部３４とバンパーロアフェース下面部の２ｄとが締結されるものである。従って組付け用の別部材の部品点数が少なくて済み、組付け性も向上し、コスト増を抑えることが可能であり、さらにはバンパーフェースに設けられた開口部に対するグリルの合沿いが向上できて見栄えが良くなる。
【００４４】
なお、特に図示しないが、別の実施の形態では、爪部２ｃの爪が上下逆に形成されて係合孔１８の下面後端部（補強部材の上面部２４の後端部）に係合されても良いし、或いは図４（Ａ）に示した断面内に上で説明した係合孔１８、爪部２ｃ、爪係合部１４ａが設けられた構造であっても良い。
【００４５】
また、本発明に関わるバンパーは次のような特徴の構造も有している。図３において、横リブ３０からさらに車両後方に向かって延びる複数の延長部３０ａがグリル１０の一部として一体に成形されており、延長部３０ａには、車両搭載部品として、図５に示しているように、例えばヘッドランプウォッシャホースが保持されている。
【００４６】
特に図示しないが、ヘッドランプウォッシャホースＨは、グリル１０よりも後方の車両前部に搭載されたフロントガラスウォッシャ液タンクからグリル１０に向かって配設されたものである。図５において、（Ａ）は延長部３０ａにヘッドランプウォッシャホースＨが保持されている状態を補強部材の後方側から見た図であり、（Ｂ）は（Ａ）におけるＣ−Ｃ断面図である。保持部材３１は延長部３０ａを上下から強く挟み込む挟持部３１ａと車幅方向に延びる平板部３１ｂとから成り、ヘッドランプウォッシャホースＨは平板部３１ｂの下面に配設されるとともに保持テープ部材Ｔによって固定されている。なお、別の実施の形態としては、ヘッドランプウォッシャホース以外も延長部３０ａに保持される車両部品として適用できる。
【００４７】
さらに、本発明は、バンパーロアフェース等の支持剛性を高めるために、図３のＢ−Ｂ断面を示す図４（Ｂ）の別の実施の形態として、アンダーカバーとバンパーロアフェースとを連結した構造も含んでいる。図６は、そのアンダーカバーとバンパーロアフェースとを連結した構造を示す図で、これによれば、補強部材２０がその後内方に設けられているバンパーロアフェース２ｂにおいて、その後方に延びる下面部２ｄは車両の前方下部を覆い、車幅方向に延びるアンダーカバー４０の前方部と締結部材３８で連結され、さらにアンダーカバー４０の後方部は車両構造体であるクロスメンバ４２の下部と締結部材３８で連結されている。
【００４８】
このような構造にすることによって、バンパーロアフェース２ｂの支持剛性が向上でき、歩行者等との衝突時にバンパーロアフェース２ｂの屈曲や破断が生じにくく、その結果、歩行者等を車両下部に巻き込む状態を回避することができる。また、図４（Ｂ）で示しているようにバンパーロアフェース２ｂと補強部材２０とは連結された構造となっているため、補強部材２０の支持剛性向上とともにバンパー構造体１自体の支持剛性も同時に向上できる。さらにこれに加えて、アンダーカバー４０によって車両走行時における空力特性も同時に向上できる。なお、別の実施の形態としては、クロスメンバ以外の車両構造体も適用できる。
【００４９】
なお、上記の構造の他に、図３のＡ−Ａ断面位置においてアンダーカバー４０をバンパーロアフェース２ｂの下面部２ｄに連結しても良く、この場合、補強部材２０の後端に設けられた厚肉部３４も同時に連結される。
【００５０】
以上の説明では、グリルと補強部材とが一体成形された構造を示したが、本発明はこれに限定されるものではなく、例えば、グリルと補強部材が別体で成形され、グリルの下部と補強部材の上部とが複数箇所において予め締結部材で機械的に連結され、この連結体をバンパーフェースに後方側から組みつけられた構造のバンパー構造体とされても良い。この場合、グリルと補強部材の締結構造以外の部分、即ち、リブ構造、グリルより後方に搭載された車両部品を保持するための横リブより後方に延びる延長部、補強部材の上面部、前面部、下面部、肉厚部の形状、補強部材とバンパーロアフェースとの締結構造、アンダーカバーとの締結構造等は、図２〜６を用いて説明したもの、或いは、別の実施形態として説明したものと同じである。
【図面の簡単な説明】
【図１】本発明に関わる自動車のバンパー構造体の正面図
【図２】グリルの正面図
【図３】グリルの後面斜視図
【図４】図３のグリルにバンパーフェースを連結した状態を示す断面図
【図５】延長部に車両搭載部品を保持した状態を示す図
【図６】アンダーカバーの締結状態を示す図
【図７】従来例を表す図
【符号の説明】
１・・・バンパー構造体２・・・バンパーフェース
２ａ・・・バンパーアッパフェース２ｂ・・・バンパーロアフェース
２ｃ・・・爪４・・・開口部
１０・・・グリル１８・・・係合孔
２０・・・補強部材２２・・・補強部材の側面部
２４・・・補強部材の上面部２６・・・補強部材の前面部
２８・・・補強部材の下面部２８ａ・・・補強凹部
３０・・・横リブ３０ａ・・・延長部
３２・・・縦リブ３４・・・厚肉部
３６・・・締結部材３８・・・ランプウォッシャホース
４０・・・アンダーカバー４２・・・クロスメンバ（車両構造体）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile bumper structure.
[0002]
[Prior art]
Regarding the bumper structure of an automobile, the following document 1 having the structure shown in FIG. 7A and FIG. 7B which is a sectional view taken along the line Y9-Y9 is known. In this structure, left and right bracket bodies 135 whose rear ends are supported by a front side frame (not shown) via a mounting plate 136 and are curved toward the rear of the bumper face under 126, and the left and right bracket bodies 135 are arranged. Are formed of a hollow body 150 coupled between them through a mounting plate 132, and longitudinal ribs 152, transverse ribs 151 and the like formed on the front surface of the hollow body.
[0003]
However, in this structure, since the number of parts is large, the assembling property is poor, and the number of fastening parts is increased. Accordingly, a lot of fastening parts are required, and the production cost is increased.
[0004]
Further, according to this structure, it is possible to prevent the pedestrian or the like from being caught under the vehicle body at the time of collision with the pedestrian or the like. Since the rib 152 and the lateral rib 151 are formed so as to protrude forward, the bumper face under 126 is provided at the front part thereof, but the ribs are not formed on the collision part of the body such as a pedestrian collided. It is conceivable that the impact force by the tip is applied intensively and the degree of damage at the collision site is increased.
[0005]
[Patent Document 1]
JP-A-2002-205613 [0006]
[Problems to be solved by the invention]
From the above, the first object of the present invention is to provide a bumper structure for an automobile that suppresses an increase in the number of parts, suppresses an increase in assemblability, and increases in cost. In addition to normal pedestrians, people who directly collide with vehicles, including bicycle and motorcycle riders, are called pedestrians.) When they collide with pedestrians, the pedestrians are caught under the vehicle. The second problem is to provide a bumper structure for an automobile that can prevent an increase in personal injury such as pedestrians.
[0007]
[Means for Solving the Problems]
The first configuration of the bumper structure of the automobile according to the present invention has an opening for introducing outside air in the bumper face, and is located behind the bumper lower face that forms a part of the bumper face below the opening. A bumper structure of an automobile having a reinforcing member, wherein a grill separate from the bumper face is attached to the opening from the rear side, and the reinforcing member is connected to at least a part of the grill and is disposed inwardly of the bumper lower face. It has been established.
[0008]
According to the configuration of this, bracket or the like as shown in the prior art, the reinforcing member dedicated attachment member is unnecessary, while achieving cost suppression and assembly improvement, can provided with reinforcing members to the bumper lower portion, the vehicle When the vehicle collides with a pedestrian or the like, it can be avoided that the pedestrian or the like is caught behind the reinforcing member, that is, in the lower part of the vehicle.
[0009]
Furthermore, since the reinforcing member is connected to the grill, it is not necessary to provide a mounting seat for mounting the reinforcing member on the back surface of the bumper lower face. As a result, no sink marks are generated on the surface of the bumper lower face, and the appearance is not impaired.
[0010]
In addition, in the first configuration, the bumper lower face is formed in a shape such that it protrudes forward from the opening and recedes backward as it goes downward, so that the reinforcing member fits inside the bumper lower face. The upper surface portion, the front surface portion, and the lower surface portion, and vertical ribs are formed across the upper surface portion, the front surface portion, and the lower surface portion.
[0011]
According to this structure, since the lower surface portion, the front surface portion, and the upper surface portion of the reinforcing member are three-dimensionally connected by the vertical ribs, the strength and rigidity of the reinforcing member are improved. A state of being caught in the lower part of the vehicle can be avoided.
[0012]
Further, according to the above configuration, the front end portion of the vertical rib is connected to the front surface portion of the reinforcing member, and the front surface portion has a shape extending in the vehicle width direction along the shape of the bumper lower face. It is possible to prevent the front side from being partially protruded by the vertical ribs, and it is possible to prevent an increase in personal damage such as a pedestrian due to the impact force being concentrated on the ribs of the reinforcing member.
[0013]
Further, according to the above configuration, since the reinforcing member having the structure with improved strength and rigidity is accommodated in the rear inward of the bumper lower face, the portion protruding forward of the bumper lower face due to low load input Crushing can be prevented.
[0014]
In a second configuration related to the present invention, the reinforcing member is connected to the grill by integral molding.
[0015]
According to the second configuration, since the reinforcing member is integrally formed with the grill, a dedicated member for the reinforcing member is not necessary, and the reinforcing member can be disposed at the lower part of the bumper while suppressing an increase in cost and improving assemblability.
[0016]
According to a third configuration of the present invention, an engagement hole is provided at a boundary portion between the grille and a reinforcing member disposed below the grille, and a claw extending rearward is provided at the upper end of the bumper lower face. And the engagement hole are engaged.
[0017]
According to the third configuration, the reinforcement member can be supported on the bumper face and the grille on the bumper face simply by engaging the claw and the engagement hole. The alignment of the grille with respect to the opening provided in the bumper face can be improved and the appearance is improved .
[0018]
According to a fourth configuration of the present invention, the lower surface portion of the reinforcing member is fastened to the lower surface portion of the bumper lower face.
[0019]
According to a fourth configuration, the fastening strength between the lower surface portion of the lower surface portion and the bumper lower face of the reinforcing member can be improved, structurally further strength, rigidity is improved, even more the effects of the first configuration Can play.
[0020]
According to a fifth configuration of the present invention, a thick portion is formed at the rear end of the lower surface portion of the reinforcing member, and the thick portion is fastened to the rear end of the lower surface portion of the bumper lower face, and at the front of the thick portion. The lower surface portion of the reinforcing member positioned is formed with a reinforcing recess that is recessed upward.
[0021]
According to a fifth configuration, the lower surface portion of the reinforcing member located in front of the thick portion is not flat, since it is a three-dimensional reinforcement recesses, the lower surface portion of the lower surface rear end and the bumper lower face of the reinforcing member The rigidity in the vicinity of the fastening portion with the rear end can be improved. As a result, the vicinity of the fastening portion between the rear end of the lower surface portion of the reinforcing member and the rear end of the lower surface portion of the bumper lower face is destroyed at the time of collision with a pedestrian or the like. It is possible to avoid a state in which it is easy to be caught.
[0022]
According to a sixth configuration of the present invention, the reinforcing member has side portions that extend rearward from the left and right ends of the vehicle width direction, and the vertical ribs extend substantially between the left and right side portions and the front portion. An orthogonal transverse rib is formed.
[0023]
According to the sixth configuration, the reinforcing member has side portions on the left and right sides, and has lateral ribs from the left and right side portions, so that the strength and rigidity of the reinforcing member are improved, and reinforcement by low load input is performed. The bending of the member in the vehicle width direction can be prevented.
[0024]
Further, according to the sixth configuration, the front end portion of the lateral rib is connected to the front surface portion of the reinforcing member, and the front surface portion has a shape extending in the vehicle width direction along the shape of the bumper lower face. It is possible to prevent the front side of the reinforcing member from being partially protruded by the lateral ribs, and to prevent an increase in personal injury such as pedestrians due to the impact force being concentrated on the ribs of the reinforcing member. Become.
[0025]
In a seventh configuration relating to the present invention, an extension portion further extending rearward is provided in a part of the lateral rib, and a vehicle component mounted rearward of the grill is held in the extension portion.
[0026]
According to the seventh configuration, the formation of the extension portion eliminates the need for a separate member for attaching a component mounted on the rear side of the grill, thereby reducing the number of components and the number of assembly steps.
[0027]
An eighth configuration according to the present invention is provided with an under cover for connecting the lower surface portion of the bumper lower face and the vehicle structure disposed behind the bumper in the vehicle width direction.
[0028]
According to the eighth configuration, the lower surface portion of the bumper lower face is connected to the vehicle structure disposed behind the bumper lower face in the vehicle width direction. The supporting rigidity of itself can be improved at the same time.
[0029]
【The invention's effect】
As described above, according to the present invention, an increase in the number of parts can be suppressed, so that it is possible to provide an automobile bumper structure that can suppress an increase in assemblability and a cost increase. Further, when the vehicle collides with a pedestrian or the like. In addition, it is possible to provide a bumper structure for an automobile that can prevent pedestrians from being caught in the lower side of the vehicle and prevent the personal injury of pedestrians from increasing due to the reinforcing structure portion at the lower part of the bumper that prevents such entanglement. can do.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a front view of an automobile bumper structure according to the present invention. The bumper structure 1 includes a bumper face 2, a grill 10, a crash can 6 that absorbs energy at the time of collision, a bumper reinforcement 8, and the like, and is assembled to the front of the vehicle body. The bumper face 2 is integrally formed by injection molding together with a bumper upper face 2a and a bumper lower face 2b on which the crash can 6 and the bumper reinforcement 8 are arranged on the rear surface side. The bumper upper face 2a and the bumper lower An opening 4 which is long in the vehicle width direction is formed between the face 2b, and a grill 10 which is formed in a lattice shape and introduces outside air to the engine room side is inserted and fixed from the rear surface side. .
[0031]
Next, the grill 10 will be described with reference to FIG. 2 which is a front view thereof and FIG. 3 which is a rear perspective view thereof (a part of the lattice is omitted). As shown in FIGS. 2 and 3, the grill 10 has a lattice portion 12 formed in a lattice shape, a peripheral portion 14 thereof, and a lower peripheral portion 14 on the lower side of the lattice portion 12. A reinforcing member 20 is integrally formed, and a plurality of engaging holes 16 and engaging holes 18 are provided on the peripheral edge portion 14 above and below the lattice portion 12, respectively. These engagement holes are for inserting and engaging the grill 10 in the opening 4 of the bumper face 2 and will be described in detail later.
[0032]
Further, as shown in FIG. 3, the structure on the rear surface side of the reinforcing member 20 in the grill 10 improves the strength and rigidity of the reinforcing member in order to prevent a pedestrian or the like from getting caught in the lower side of the vehicle. For this purpose, a plurality of ribs and the like are provided.
[0033]
The reinforcing member 20 is formed in a shape that once protrudes forward of the vehicle from the opening 4 and recedes backward as it goes downward. That is, the reinforcing member 20 includes an upper surface portion 24 (see FIG. 4A) that extends toward the front of the vehicle so as to fit substantially along the shape of the bumper lower face 2b at the rear inner side of the bumper lower face 2b, and the upper surface portion. The front portion 26 extends downward from the front portion 24 (see FIG. 4A), and the lower portion 28 extends rearward from the front portion 26. The side surface portion 22, the upper surface portion 24, the front surface portion 26, and the lower surface portion 28 form an outer surface frame, the lateral rib 30 connecting the side surface portions 22 extends rearward from the front surface portion 26, and the upper surface portion 24. And a front surface portion 26 and a lower surface portion 28, and a plurality of vertical ribs 32 substantially orthogonal to the horizontal ribs 30 are formed. 3 and 4, one horizontal rib is provided, but a plurality of ribs may be provided.
[0034]
Since the reinforcing member 20 has such a structure with high strength and rigidity, even when the vehicle collides with a pedestrian or the like, the reinforcing member 20 is not easily bent or broken. It can prevent being caught.
[0035]
Further, since the front portion 26 is integrally formed in the front portion of the horizontal rib 30 and the vertical rib 32 in the vehicle width direction, the body of a collided pedestrian or the like as shown in the prior art is used. Concentration of impact force by the rib tip portion on the collision site can be prevented, and the degree of damage of the collision site can be reduced.
[0036]
Next, a connection structure between the grill 10 and the bumper face 2 will be described with reference to FIG. 4A is a view showing a state in which the bumper face 2 is connected to the grill 10 at the AA cross section in FIG. 3, and FIG. 4B is a bumper at the grill 10 at the BB cross section in FIG. It is a figure which shows the state which connected the face 2. FIG.
[0037]
As shown in FIG. 4A, an opening 4 is formed between the bumper upper face 2a and the bumper lower face 2b, and the lattice portion 12 of the grill 10 is inserted from the rear side. The bumper lower face 2b below the opening 4 is formed in a shape that once protrudes forward from the opening and recedes backward as it goes downward, and extends to a substantially horizontal bumper lower face lower surface 2d.
[0038]
As described above, the grill 10 is formed by integrally forming the lattice portion 12 and the reinforcing member 20, and the reinforcing member 20 has a shape that fits in the rear portion of the bumper lower face 2b. That is, an upper surface portion 24 that once protrudes forward of the vehicle from a slightly lower position of the lattice portion 12, a front surface portion 26 that extends downward from the upper surface portion 24, and a lower surface portion 28 that extends rearward as it goes downward, and The upper surface portion 24, the front surface portion 26, and the lower surface portion 28 are integrally connected to the side surface portion 22 shown in FIG.
[0039]
Further, the lower surface portion 28 is formed with a plurality of thick portions 34 on the rear side (see FIG. 3), and is fastened to the bumper lower face lower surface portion 2d by a connecting member 36. The hanging portion 2f extending downward on the lower surface portion 2d of the bumper lower face improves the aerodynamic characteristics and the appearance from the front of the vehicle, and the fastening member and the vicinity of the fastening portion are damaged by a stepping stone during traveling. Has the effect of preventing.
[0040]
The lower surface portion 28 of the reinforcing member reaching the thick portion 34 has a reinforcing concave portion 28a that is recessed in the upper direction, as can be seen from FIG. 4C showing the CC cross section of FIG. ing. That is, the lower surface portion 28 has a three-dimensional structure having walls in three directions at the front portion of the thick portion that is the fastening portion with the bumper lower face lower surface portion 2d, so that the vicinity of the fastening portion can be easily broken in the event of a collision. It does not have a high strength structure.
[0041]
The fastening structure between the lower part of the bumper lower face 2b and the reinforcing member 20 has been described above. Next, regarding the fastening structure between the upper part of the bumper lower face 2b and the reinforcing member 20, B including the insertion hole 18 in FIG. A description will be given based on FIG. 4B, which shows a state in which the bumper face 2 is connected to the grill 10 having a cross section of −B.
[0042]
On the surface BB, unlike the cross-section AA, the thick portion 34 is not formed behind the lower surface portion 28 of the reinforcing member 20, and therefore is not fastened to the bumper lower face lower surface portion 2d. However, an engagement hole 18 is provided in the peripheral edge portion 14 formed above the reinforcing member 20, and a claw portion 2c extending rearward from the upper surface portion 2e of the bumper lower face 2b is inserted into the engagement hole 18, The claw portion 2 c is engaged with a claw engaging portion 14 a at the rear end of the peripheral edge portion 14.
[0043]
As can be seen from the above description, the grill 10 has a rear side of the bumper face 2 while aligning the lattice portion 12 with the opening 4 of the bumper face 2 and the engaging hole 18 with respect to the claw portion 2c. The thick portion 34 of the reinforcing member 20 and the bumper lower face lower surface portion 2d are fastened. Therefore, it is possible to reduce the number of parts of separate members for assembly, improve the assembly, reduce the cost, and improve the alignment of the grille with the opening provided in the bumper face. And looks better.
[0044]
Although not particularly illustrated, in another embodiment, the claw of the claw portion 2c is formed upside down and is engaged with the rear lower end portion of the engagement hole 18 (rear end portion of the upper surface portion 24 of the reinforcing member). Alternatively, a structure in which the engagement hole 18, the claw portion 2c, and the claw engagement portion 14a described above are provided in the cross section shown in FIG.
[0045]
Further, the bumper according to the present invention also has the following characteristic structure. In FIG. 3, a plurality of extensions 30a extending from the lateral rib 30 further toward the rear of the vehicle are integrally formed as a part of the grill 10, and the extensions 30a are shown in FIG. For example, a headlamp washer hose is held.
[0046]
Although not particularly illustrated, the headlamp washer hose H is disposed from the windshield washer liquid tank mounted on the front of the vehicle behind the grill 10 toward the grill 10. 5A is a view of the state in which the headlamp washer hose H is held by the extension 30a as viewed from the rear side of the reinforcing member, and FIG. 5B is a cross-sectional view taken along the line CC in FIG. is there. The holding member 31 includes a holding portion 31a that strongly holds the extended portion 30a from above and below and a flat plate portion 31b that extends in the vehicle width direction. The headlamp washer hose H is disposed on the lower surface of the flat plate portion 31b and is held by the holding tape member T. It is fixed. In addition, as another embodiment, it can apply as vehicle parts hold | maintained at the extension part 30a other than a headlamp washer hose.
[0047]
Further, in the present invention, in order to increase the support rigidity of the bumper lower face and the like, as another embodiment of FIG. 4B showing the BB cross section of FIG. 3, the under cover and the bumper lower face are connected. Includes structure. FIG. 6 is a view showing a structure in which the under cover and the bumper lower face are connected to each other. According to this, the lower surface portion extending rearward of the bumper lower face 2b in which the reinforcing member 20 is provided inwardly thereafter. 2d covers the front lower part of the vehicle and is connected to the front part of the under cover 40 extending in the vehicle width direction by a fastening member 38, and the rear part of the under cover 40 is connected to the lower part of the cross member 42 which is a vehicle structure and the fastening member 38. It is connected with.
[0048]
With such a structure, the support rigidity of the bumper lower face 2b can be improved, and the bumper lower face 2b is not easily bent or broken at the time of collision with a pedestrian or the like. As a result, the pedestrian or the like is caught in the lower part of the vehicle. A state can be avoided. Further, as shown in FIG. 4B, the bumper lower face 2b and the reinforcing member 20 are connected to each other, so that the supporting rigidity of the reinforcing member 20 is improved and the supporting rigidity of the bumper structure 1 itself is also improved. It can be improved at the same time. In addition to this, the under cover 40 can simultaneously improve the aerodynamic characteristics during vehicle travel. As another embodiment, a vehicle structure other than a cross member can be applied.
[0049]
In addition to the above structure, the under cover 40 may be connected to the lower surface portion 2d of the bumper lower face 2b at the position of the AA cross section in FIG. 3, and in this case, the under cover 40 is provided at the rear end of the reinforcing member 20. The thick part 34 is also connected simultaneously.
[0050]
In the above description, the structure in which the grill and the reinforcing member are integrally formed is shown. However, the present invention is not limited to this, and for example, the grill and the reinforcing member are separately formed, The upper part of the reinforcing member may be mechanically connected to the bumper structure in advance at a plurality of locations by a fastening member, and the connected body may be a bumper structure having a structure assembled from the rear side to the bumper face. In this case, parts other than the fastening structure of the grill and the reinforcing member, that is, a rib structure, an extension extending rearward from the lateral rib for holding vehicle parts mounted rearward of the grill, an upper surface portion of the reinforcing member, and a front surface portion The shape of the lower surface part, the thick part, the fastening structure between the reinforcing member and the bumper lower face, the fastening structure with the under cover, etc. are described with reference to FIGS. 2 to 6 or as another embodiment. Is the same.
[Brief description of the drawings]
FIG. 1 is a front view of a bumper structure of an automobile according to the present invention. FIG. 2 is a front view of a grill. FIG. 3 is a rear perspective view of the grill. [Fig. 5] Fig. 5 is a diagram showing a state where a vehicle-mounted component is held in an extension portion. [Fig. 6] Fig. 6 is a diagram showing a fastening state of an under cover. [Fig.
DESCRIPTION OF SYMBOLS 1 ... Bumper structure 2 ... Bumper face 2a ... Bumper upper face 2b ... Bumper lower face 2c ... Claw 4 ... Opening part 10 ... Grill 18 ... Engagement hole DESCRIPTION OF SYMBOLS 20 ... Reinforcement member 22 ... Side surface part 24 of reinforcement member ... Upper surface part of reinforcement member 26 ... Front surface part 28 of reinforcement member ... Lower surface part of reinforcement member 28a ... Reinforcement recessed part 30 ..Horizontal rib 30a ... extension part 32 ... vertical rib 34 ... thick part 36 ... fastening member 38 ... lamp washer hose 40 ... under cover 42 ... cross member (vehicle) Structure)

Claims

A bumper structure for an automobile having an opening for introducing outside air in a bumper face, and having a reinforcing member below and inside the bumper lower face that forms a part of the bumper face.
A grill separate from the bumper face is attached to the opening from the rear side, and the reinforcing member is connected to at least a part of the grill and is disposed inwardly behind the bumper lower face ,
The bumper lower face is formed in a shape that once protrudes forward of the vehicle from the opening and recedes backward as it goes downward.
The reinforcing member includes an upper surface portion that extends toward the front of the vehicle so as to fit substantially along the shape of the bumper lower face at the rear inner side of the bumper lower face, a front surface portion that extends downward from the upper surface portion, and the front surface portion. A bumper structure for an automobile, characterized in that a vertical rib is formed across the upper surface portion, the front surface portion, and the lower surface portion .

The automobile bumper structure according to claim 1, wherein the reinforcing member is connected to the grill by integral molding.

An engagement hole is provided at a boundary portion between the grill and the reinforcing member disposed at a lower portion thereof, and a claw extending rearward is provided at an upper end of the bumper lower face, and the claw and the engagement hole are provided. The bumper structure of the automobile according to claim 1 or 2, wherein the bumper structure is engaged .

Wherein the lower surface of the reinforcing member is fastened to the lower surface of the bumper lower face, automobile bumpers structure according to any one of claims 1 to 3.

A thick portion is formed at the rear end of the lower surface portion of the reinforcing member, and the thick portion is fastened to the rear end of the lower surface portion of the bumper lower face, and the reinforcing member positioned in front of the thick portion. The bumper structure for an automobile according to claim 4 , wherein the lower surface portion is formed with a reinforcing recess recessed upward.

The reinforcing member has side portions extending rearward from both left and right ends of the vehicle width direction, and lateral ribs that are substantially orthogonal to the vertical ribs are formed across the left and right side portions and the front surface portion. The bumper structure of the automobile according to any one of claims 1 to 5 , wherein the bumper structure is provided.

The automobile according to claim 6 , wherein an extension part extending further rearward is provided in a part of the lateral rib, and a vehicle part mounted rearward of the grill is held in the extension part. Bumper structure.

Wherein the under cover for connecting the vehicle structure is disposed behind the lower surface portion and the bumper of the bumper lower face over the vehicle width direction is provided, according to claim 1 to 7 A bumper structure for an automobile according to any one of the above.