JP3691422B2

JP3691422B2 - Rear body structure of van type car

Info

Publication number: JP3691422B2
Application number: JP2001306617A
Authority: JP
Inventors: 浩大久保; 基之籾井; 学中山
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2001-10-02
Filing date: 2001-10-02
Publication date: 2005-09-07
Anticipated expiration: 2021-10-02
Also published as: JP2003104239A

Description

【０００１】
【発明の属する技術分野】
この発明は、バン型自動車の後部車体構造に関し、特に、テイルゲート開口部の捻れ剛性を向上させることができるものに係る。
【０００２】
【従来の技術】
従来からバン型自動車においては、車体後部のバックドア取付部に強度剛性上不利な比較的大きい開口部が形成されるため、このバックドア開口部を変形し難くした構造が知られている。
例えば、特開平８−１６４８７２号公報に示されているようにバックドア開口部の上辺部にリヤルーフレールとリヤルーフレールレインフォースとで閉断面構造部を形成したり、特開２０００−４３７５４号公報に示されているように、バックドア開口部の両側辺部においてリヤピラーインナーの内面にレインフォースを接合してリヤピラー閉断面を形成し、接続部の剛性を高めるためにリヤピラー閉断面とバックドア開口部の下辺部のリヤエンドクロス閉断面とを連続して接合し、これら閉断面同志の接続部分の捻れ剛性を一段と高めるようにしたものがある。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記従来のバン型自動車の後部車体構造においては、部分的に閉断面構造を採用することで、その部位における部分的な剛性を高めることはできるが、旋回時において外輪から車体へ加わる外部応力等によるバックドア開口部全体の変形に対しては十分なものとはいえなかった。つまり、バン型自動車の車体開口部の中で最も大きいバックドア開口部の変形を抑え捻れ剛性を高めるためには、単に部分的に閉断面構造部を設けるだけでは十分ではなく、使用されている材料の板厚を増加させたり、補強材を各パネルの全面に接合したりする必要がある。その結果、車体重量の増加を招いてしまうという問題がある。
そこで、この発明は、車体軽量化を可能としつつ、捻れ剛性を高めることができるバン型自動車の後部車体構造を提供するものである。
【０００４】
【課題を解決するための手段】
上記課題を解決するために、請求項１に記載した発明は、テイルゲート開口部（例えば、実施形態におけるテイルゲート開口部２）の上辺部にリヤピラースティフナーアッパー（例えば、実施形態におけるリヤピラースティフナーアッパー５）とリヤピラーインナーアッパー（例えば、実施形態におけるリヤピラーインナーアッパー６）とで形成された第１閉断面構造部（例えば、実施形態における第１閉断面構造部７）を設け、前記テイルゲート開口部の左右の側辺部をリヤピラースティフナーサイド（例えば、実施形態におけるリヤピラースティフナーサイド１５）とリヤピラーインナーサイド（例えば、実施形態におけるリヤピラーインナーサイド１６）とで形成された第２閉断面構造部（例えば、実施形態における第２閉断面構造部１７）で構成し、下辺部をリヤスティフナー（例えば、実施形態におけるリヤスティフナー２２）とリヤパネル（例えば、実施形態におけるリヤパネル２３）とで形成された第３閉断面構造部（例えば、実施形態における第３閉断面構造部２４）で構成し、前記第１閉断面構造部と前記第２閉断面構造部とを連続して接続し、第１閉断面構造部と第２閉断面構造部との接続部（例えば、実施形態における接続部３０）を、縦壁（例えば、実施形態における縦壁５’’）と上壁（例えば、実施形態における上壁５’）とを有する前記リヤピラースティフナーアッパー（例えば、実施形態におけるリヤピラースティフナーアッパー５）と前記リヤピラーインナーアッパー（例えば、実施形態におけるリヤピラーインナーアッパー６）とで閉断面に形成し、前記上壁とルーフパネル（例えば、実施形態におけるルーフパネル１０）との間にハーネス（例えば、実施形態におけるハーネス３４）を配索する空間部（例えば、実施形態における空間部３７）を設けると共に前記上壁にテイルゲートへのハーネスを挿通する孔（例えば、実施形態における孔３３）を設けたことを特徴とする。
このように構成することで、テイルゲート開口部を第１閉断面構造部と第２閉断面構造部とを連続し第３閉断面構造部を接続して構成し、各閉断面部を構成する部材の板厚を薄くし、閉断面構造により強度を持たせて、車体軽量化と捻れ剛性向上を両立させることが可能となる。
また、第１閉断面構造部とルーフパネルとの間の空間部を利用して、前記ハーネスを前記上壁の孔から車室内側へ挿通可能とし、前記接続部の縦壁に孔を設けないようにして閉断面構造部を確保できる。
【０００８】
【発明の実施の形態】
以下、この発明の実施形態を図面と共に説明する。
図１はこの発明の実施形態のバン型自動車の後部車体構造を示すものである。同図において、車体後部にはバックドアであるテイルゲート（図２に示す）１が開閉可能に取り付けられるテイルゲート開口部２が形成されている。テイルゲート開口部２は車体下部の左右にランプユニットを取り付ける関係で、下部においてその幅方向の長さが短く形成されている。テイルゲート開口部２は、上辺部にテイルゲート１のヒンジ取付部３を有し、左右の側辺部にテイルゲートステー取付部４を有し、下辺部の下壁には図示しないジャッキアップポイントを有している。
【０００９】
テイルゲート開口部２の上辺部には両側部にリヤピラースティフナーアッパー５とリヤピラーインナーアッパー６とで形成された第１閉断面構造部７，７が設けられている。
図２は図１のＳ−Ｓ線に沿う断面図である。図２において、リヤピラーインナーアッパー６には、上部からハット型断面形状のリヤピラースティフナーアッパー５のフランジ部８が接合され、両者により上記第１閉断面構造部７が形成されている。尚、ハット型断面形状とはコの字断面形状の側縁部にフランジ部が形成されている断面形状を示す。リヤピラースティフナーアッパー５には、前記ヒンジ取付部３に対応する位置にテイルゲートヒンジレインフォース９が接合されている。このテイルゲートヒンジレインフォース９にはルーフパネル１０が接合され、このルーフパネル１０上のヒンジ取付部３にヒンジ部材１１を介してテイルゲート１が開閉可能に支持されている。
【００１０】
ここで、ルーフパネル１０の後部端末は車室内のルーフ内装材を構成するルーフライニング１２の後部端末と共にウェザーストリップ１３により固定されて後方で立ち上がり、テイルゲート１閉鎖時にテイルゲート１内面に密接するウェザーストリップ１３によりシール性が維持された状態で、車体幅方向に延びるルーフドリップ部１４を構成している。尚、テイルゲート開口部２の中央部、具体的にはヒンジ取付部３の内側部位には閉断面構造部は設けられていない。
【００１１】
図１に示すように、テイルゲート開口部２の左右の側辺部は各々リヤピラースティフナーサイド１５とリヤピラーインナーサイド１６とで形成された第２閉断面構造部１７で構成され、この第２閉断面構造部１７の上部が前記第１閉断面構造部７の側部に接続されている。尚、リヤピラースティフナーサイド１５は車室内側に開いた断面形状の部材である。また、リヤピラーインナーサイド１６は車室外側に開いた断面形状の部材である。
【００１２】
図４は図１のＣ−Ｃ線に沿う断面図、図５は図１のＤ−Ｄ線に沿う断面図である。前記第２閉断面構造部１７は、図４に示すリヤピラー部１８においては、ハット型断面形状のリヤピラースティフナーサイド１５のフランジ部２０がリヤピラーインナーサイド１６に接合されて前記第２閉断面構造部１７が形成されている。この第２閉断面構造部１７は、リヤピラーインナーサイド１６とリヤピラーアウター１９とで閉断面構造に形成されたリヤピラー部１８の内部に形成されることとなり、リヤピラースティフナーサイド１５の後部のフランジ部２０はリヤピラーインナーサイド１６とリヤピラーアウター１９の後部の接合フランジ部２１に重ね合わせて接合されている。
そして、上記第２閉断面構造部１７は下部に行くにつれて、図５に示すように前記閉断面形状が変化し、リヤピラーアウター１９の一部が車体後壁を構成するようになっている。
【００１３】
図１に示すように、テイルゲート開口部２の下辺部はリヤスティフナー２２とリヤパネル２３とで形成された第３閉断面構造部２４で構成され、この第３閉断面構造部２４の側部が前記各第２閉断面構造部１７の下部に接続されている。尚、リヤスティフナー２２は下側に開いた断面形状の部材である。
図６は図１のＡ−Ａ線に沿う断面図である。前記第３閉断面構造部２４は、図６に示すように、Ｌ型断面形状に形成されたリヤスティフナー２２と、このリヤスティフナー２２の後縁フランジ部２５と下縁部２６とに接合されるリヤパネル２３とで構成されている。リヤパネル２３下縁にはフロアパネル２７の後縁フランジ部２８が接合されている。尚、この実施形態では前記フロアパネル２７は、スペアタイヤの収納部２９の底壁を形成している。
【００１４】
そして、図７に示すように、例えば、右側の第１閉断面構造部７と第２閉断面構造部１７との接続部３０においては、第１閉断面構造部７を構成するリヤピラースティフナーアッパー５の側縁と第２閉断面構造部１７を構成するリヤピラースティフナーサイド１５の上縁とを接合すると共に第１閉断面構造部７を構成するリヤピラーインナーアッパ６の側縁と第２閉断面構造部１７を構成するリヤピラーインナーサイド１６の上縁とを接合して、第１閉断面構造部７と第２閉断面構造部１７とが連続して接合されている。また、左側の第１閉断面構造部７と第２閉断面構造部１７も同様にして接合されている。
【００１５】
また、図８に示すように、各第２閉断面構造部１７と第３閉断面構造部２４との接続部３１においては、第２閉断面構造部１７を構成するリヤピラーインナーサイド１６の下縁と第３閉断面構造部２４を構成するリヤスティフナー２２の側縁とを接合すると共に第２閉断面構造部１７を構成するリヤピラースティフナーサイド１５の下縁と第３閉断面構造部２４を構成するリヤパネル２３の側縁とを接合して、各第２閉断面構造部１７と第３閉断面構造部２４とが連続して接合されている。
【００１６】
したがって、テイルゲート開口部２は、前記左側のヒンジ取付部３を有する第１閉断面構造部７、左側の第２閉断面構造部１７、第３閉断面構造部２４、右側の第２閉断面構造部１７、及び、右側のヒンジ取付部３を有する第１閉断面構造部７に至り、全体として上方向に向いた（開いた）略Ｕ字形状の閉断面構造部を有することとなる。
【００１７】
また、上述したように第１閉断面構造部７と第２閉断面構造部１７の接続部３０では、リヤピラースティフナーアッパー５とリヤピラースティフナーサイド１５、リヤピラーインナーアッパー６とリヤピラーインナーサイド１６とが接合されるため、この接続部３０において重ね合わされた部材の板厚よりも第１閉断面構造部７あるいは第２閉断面構造部１７における部材の板厚が薄くなり、第２閉断面構造部１７と第３閉断面構造部２４の接続部３１では、リヤピラーインナーサイド１６とリヤスティフナー２２、リヤピラースティフナーサイド１５とリヤパネル２３とが接合されるため、この接続部３１において重ね合わされた部材の板厚よりも第２閉断面構造部１７あるいは第３閉断面構造部２４における部材の板厚を薄くできる。
【００１８】
図３は図１のＢ−Ｂ線に沿う断面図である。同図において、第１閉断面構造部７と第２閉断面構造部１７の接続部３０の上壁を構成するリヤピラースティフナーアッパー５の上壁５’には、テイルゲート１の電装機能部品、具体的にはテイルゲート１のライセンスランプ、ワイパーへのハーネス３４を挿通する孔３３が形成されている。また、リヤピラーインナーアッパー６にはハーネス３４を車室内側へ挿通可能な孔３２が形成されている。
一方、ルーフパネル１０に形成された取付孔３５にグロメット３６が取り付けられている。したがって、ハーネス３４は車室内側から前記２つの孔３２，３３を通りルーフパネル１０とリヤピラーインナーアッパー６とで囲まれた側方に向かう比較的広い空間部３７で余裕をもって湾曲されグロメット３６によりシールされた状態で、図示しないテイルゲート１側に引き出されている。
【００１９】
上記実施形態によれば、テイルゲート開口部２を第１閉断面構造部７，７と第２閉断面構造部１７，１７と第３閉断面構造部２４とを連続して接続して構成し、各閉断面部を構成する部材の板厚を薄くし、閉断面構造により強度を持たせて、車体軽量化と捻れ剛性向上を両立させることが可能となる。
つまり、テイルゲート開口部２をほぼ全周に渡って閉断面構造で連続して全体的な剛性を向上することにより、例えば車体旋回時におけるロールにより外輪から車体へ作用する荷重に対してテイルゲート開口部２全体が高い捻れ剛性を発揮して対抗することができる。
【００２０】
したがって、第１閉断面構造部７、第２閉断面構造部１７、第３閉断面構造部２４を構成するリヤピラースティフナーアッパー５とリヤピラーインナーアッパー６、リヤピラースティフナーサイド１５とリヤピラーインナーサイド１６、リヤスティフナー２２とリヤパネル２３自体の板厚を減少することができ軽量化が可能となる。
【００２１】
また、大きな荷重が作用する前記各接続部３０，３１も閉断面構造に形成されているため、この接続部３０，３１に比較して作用する応力が小さい隣接する接続部３０，３１間の各閉断面構造部７，１７，２４における部材の板厚、つまり上記リヤピラースティフナーアッパー５とリヤピラーインナーアッパー６、リヤスティフナーサイド１５とリヤピラーインナーサイド１６、リヤスティフナー２２とリヤパネル２３を薄くすることが可能となるため、より一層車体軽量化を図ることができる。
【００２２】
とりわけ、ジャッキアップポイントを設定する関係でテイルゲート開口部２の下辺部においては全域に渡って第３閉断面構造部２４を設けなければならないが、そのような荷重に晒されないテイルゲート開口部２の上辺部は両側に第１閉断面構造部７を形成すれば中央部付近には閉断面構造部を形成しなくても済むため、無駄な閉断面構造部を形成する必要がなく車体軽量化を図ることができる。
つまり、捻れ応力が他の部分より低いテイルゲート開口部２の上辺部の中央部分は閉断面構造としないで、第１〜第３閉断面構造部７，１７，２４を上方向に向いた略Ｕ字形状に形成することで、より一層車体軽量化が可能となるのである。
【００２３】
また、前記孔３３はリヤピラースティフナーアッパー５の上壁５’に設けられているため、前記第３閉断面構造部２から第２閉断面構造部１７、第２閉断面構造部１７から第２閉断面構造部１７と第３閉断面構造部２４との接続部３０に至る部位において連続した閉断面構造部を確保できる。
したがって、ハーネス３４挿通用の孔３３をリヤピラースティフナーアッパー５の縦壁５”に設ける必要がなくなり剛性の高い閉断面構造部を確保できる。また、ハーネス３４は車室内側から２つの孔３２，３３を通りルーフパネル１０とリヤピラーインナーアッパー６とで囲まれた側方に向かう比較的広い空間部３７で余裕をもって湾曲させて配索できるためハーネス３４の配索作業が行い易くなる。
【００２４】
【発明の効果】
以上説明してきたように、請求項１に記載した発明によれば、テイルゲート開口部を第１閉断面構造部と第２閉断面構造部とを連続し第３閉断面構造部を接続して構成し、各閉断面部を構成する部材の板厚を薄くし、閉断面構造により強度を持たせて、車体軽量化と捻れ剛性向上を両立させることができる効果がある。
また、第１閉断面構造部とルーフパネルとの間の空間部を利用して、前記ハーネスを前記上壁の孔から車室内側へ挿通可能とし、前記接続部の縦壁に孔を設けないようにして閉断面構造部を確保できるため、ハーネスの配索作業が容易となる。
【図面の簡単な説明】
【図１】この発明の実施形態のバン型自動車の後部車体構造を示す斜視図である。
【図２】図１のＳ−Ｓ線に沿う断面図である。
【図３】図１のＢ−Ｂ線に沿う断面図である。
【図４】図１のＣ−Ｃ線に沿う断面図である。
【図５】図５は図１のＤ−Ｄ線に沿う断面図である。
【図６】図６は図１のＡ−Ａ線に沿う断面図である。
【図７】図７は左側の接続部３１を上から見た部分切欠斜視図である。
【図８】図８は右側の接続部３０を車室内側から見た部分切欠斜視図である。
【符号の説明】
２テイルゲート開口部
５リヤピラースティフナーアッパー
５’ 上壁
５” 縦壁
６リヤピラーインナーアッパー
７第１閉断面構造部
１０ルーフパネル
１５リヤピラースティフナーサイド
１６リヤピラーインナーサイド
１７第２閉断面構造部
２２リヤスティフナー
２３リヤパネル
２４第３閉断面構造部
３０接続部
３１接続部
３３孔
３４ハーネス
３７空間部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rear body structure of a van type automobile, and particularly relates to a structure that can improve torsional rigidity of a tailgate opening.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a van-type automobile, a relatively large opening that is disadvantageous in terms of strength and rigidity is formed in a back door mounting portion at the rear of a vehicle body, and thus a structure that makes it difficult to deform the back door opening is known.
For example, as shown in Japanese Patent Application Laid-Open No. 8-164722, a closed section structure is formed by a rear roof rail and a rear roof rail reinforcement on the upper side of the back door opening, or Japanese Patent Application Laid-Open No. 2000-43754. As shown in the figure, the rear pillar closed cross section and the back door opening are formed in order to increase the rigidity of the connecting portion by joining the reinforcement to the inner surface of the inner side of the rear pillar at both sides of the back door opening. In some cases, the rear end cross closed cross section of the lower side is continuously joined and the torsional rigidity of the connecting portions of the closed cross sections is further increased.
[0003]
[Problems to be solved by the invention]
However, in the rear body structure of the conventional van type automobile described above, a partially closed cross-section structure can be used to increase the partial rigidity of the part, but the exterior is applied to the vehicle body from the outer ring during turning. The deformation of the entire back door opening due to stress or the like was not sufficient. In other words, in order to suppress the deformation of the largest back door opening in the body opening of a van type automobile and to increase the torsional rigidity, it is not sufficient to simply provide a partially closed cross-section structure part. It is necessary to increase the thickness of the material or to join the reinforcing material to the entire surface of each panel. As a result, there is a problem that the weight of the vehicle body is increased.
Accordingly, the present invention provides a rear vehicle body structure of a van type automobile that can increase the torsional rigidity while enabling the weight reduction of the vehicle body.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention described in claim 1 is directed to a rear pillar stiffener upper (for example, the rear pillar stiffener upper 5 in the embodiment) at the upper side of the tail gate opening (for example, the tail gate opening 2 in the embodiment). ) And a rear pillar inner upper (for example, the rear pillar inner upper 6 in the embodiment), and a first closed cross-section structure portion (for example, the first closed cross-section structure portion 7 in the embodiment) is provided. A second closed cross-section structure portion (for example, implementation) in which left and right side portions are formed by a rear pillar stiffener side (for example, the rear pillar stiffener side 15 in the embodiment) and a rear pillar inner side (for example, the rear pillar inner side 16 in the embodiment). Second closed cross-section structure in the form 7), and a lower side portion is formed of a rear stiffener (for example, rear stiffener 22 in the embodiment) and a rear panel (for example, rear panel 23 in the embodiment). 3 closed cross-section structure portion 24), the first closed cross-section structure portion and the second closed cross-section structure portion are connected continuously, and the first closed cross-section structure portion and the second closed cross-section structure portion are connected. The rear pillar stiffener upper (for example, the connecting portion 30 in the embodiment) has a vertical wall (for example, the vertical wall 5 ″ in the embodiment) and an upper wall (for example, the upper wall 5 ′ in the embodiment). The rear pillar stiffener upper 5) in the embodiment and the rear pillar inner upper (for example, the rear pillar inner upper 6 in the embodiment) are formed in a closed cross section. Between the upper wall and the roof panel (for example, the roof panel 10 in the embodiment), a space portion (for example, the space portion 37 in the embodiment) for routing a harness (for example, the harness 34 in the embodiment) is provided. A hole (for example, hole 33 in the embodiment) through which the harness to the tail gate is inserted is provided in the upper wall.
By configuring in this way, the tail gate opening is configured by continuously connecting the first closed cross-section structure portion and the second closed cross-section structure portion and connecting the third closed cross-section structure portion, thereby configuring each closed cross-section portion. It is possible to reduce the thickness of the member and provide strength by the closed cross-sectional structure, and to achieve both weight reduction of the vehicle body and improvement of torsional rigidity.
Further, the space between the first closed cross-section structure portion and the roof panel is used to allow the harness to be inserted from the hole in the upper wall to the vehicle interior side, and no hole is provided in the vertical wall of the connection portion. In this way, a closed cross-section structure portion can be secured .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a rear body structure of a van type automobile according to an embodiment of the present invention. In the figure, a tail gate opening 2 to which a tail gate (shown in FIG. 2) 1 as a back door is attached is formed at the rear of the vehicle body. The tail gate opening 2 is formed so that the lamp unit is attached to the left and right of the lower part of the vehicle body, and the length in the width direction is short at the lower part. The tail gate opening 2 has a hinge mounting portion 3 for the tail gate 1 on the upper side, a tail gate stay mounting portion 4 on the left and right side portions, and a jack-up point (not shown) on the lower wall of the lower side have.
[0009]
On the upper side of the tail gate opening 2, first closed cross-section structures 7, 7 formed of a rear pillar stiffener upper 5 and a rear pillar inner upper 6 are provided on both sides.
FIG. 2 is a cross-sectional view taken along the line SS of FIG. In FIG. 2, the flange portion 8 of the rear pillar stiffener upper 5 having a hat-shaped cross section is joined to the rear pillar inner upper 6 from above, and the first closed cross-section structure portion 7 is formed by both. The hat-shaped cross-sectional shape indicates a cross-sectional shape in which a flange portion is formed on a side edge portion of the U-shaped cross-sectional shape. A tail gate hinge reinforcement 9 is joined to the rear pillar stiffener upper 5 at a position corresponding to the hinge mounting portion 3. A roof panel 10 is joined to the tailgate hinge reinforcement 9, and the tailgate 1 is supported by a hinge mounting portion 3 on the roof panel 10 via a hinge member 11 so as to be opened and closed.
[0010]
Here, the rear terminal of the roof panel 10 is fixed by a weather strip 13 together with the rear terminal of the roof lining 12 constituting the roof interior material of the vehicle interior, rises rearward, and is in close contact with the inner surface of the tail gate 1 when the tail gate 1 is closed. A roof drip portion 14 extending in the vehicle body width direction is configured in a state where the sealing performance is maintained by the strip 13. In addition, the closed cross-section structure part is not provided in the center part of the tail gate opening part 2, specifically, the inner site | part of the hinge attaching part 3. FIG.
[0011]
As shown in FIG. 1, the left and right side portions of the tail gate opening 2 are each composed of a second closed cross-section structure portion 17 formed of a rear pillar stiffener side 15 and a rear pillar inner side 16, and this second closed cross section. An upper portion of the structure portion 17 is connected to a side portion of the first closed cross-section structure portion 7. The rear pillar stiffener side 15 is a member having a cross-sectional shape opened to the vehicle interior side. The rear pillar inner side 16 is a member having a cross-sectional shape opened to the outside of the passenger compartment.
[0012]
4 is a cross-sectional view taken along line CC in FIG. 1, and FIG. 5 is a cross-sectional view taken along line DD in FIG. In the rear pillar portion 18 shown in FIG. 4, the second closed cross-section structure portion 17 is configured such that the flange portion 20 of the rear pillar stiffener side 15 having a hat-shaped cross-section shape is joined to the rear pillar inner side 16 and the second closed cross-section structure portion 17. Is formed. The second closed cross-section structure portion 17 is formed inside the rear pillar portion 18 formed in the closed cross-section structure by the rear pillar inner side 16 and the rear pillar outer 19, and the flange portion 20 at the rear portion of the rear pillar stiffener side 15 is The rear pillar inner side 16 and the rear pillar outer 19 are overlapped and joined to the joint flange portion 21 at the rear part.
Then, as the second closed cross-section structure portion 17 goes downward, the closed cross-sectional shape changes as shown in FIG. 5, and a part of the rear pillar outer 19 constitutes the rear wall of the vehicle body.
[0013]
As shown in FIG. 1, the lower side portion of the tail gate opening 2 is composed of a third closed cross-section structure portion 24 formed of a rear stiffener 22 and a rear panel 23, and the side portion of the third closed cross-section structure portion 24 is It is connected to the lower part of each of the second closed cross-section structures 17. The rear stiffener 22 is a member having a cross-sectional shape opened downward.
6 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 6, the third closed cross-section structure portion 24 is joined to a rear stiffener 22 formed in an L-shaped cross-sectional shape, and a rear edge flange portion 25 and a lower edge portion 26 of the rear stiffener 22. The rear panel 23 is configured. A rear edge flange portion 28 of the floor panel 27 is joined to the lower edge of the rear panel 23. In this embodiment, the floor panel 27 forms the bottom wall of the spare tire storage portion 29.
[0014]
As shown in FIG. 7, for example, in the connection portion 30 between the first closed cross-section structure portion 7 and the second closed cross-section structure portion 17 on the right side, the rear pillar stiffener upper 5 constituting the first closed cross-section structure portion 7. The side edge of the rear pillar inner upper 6 constituting the first closed cross-section structure portion 7 and the second closed cross-section structure portion are joined to the upper edge of the rear pillar stiffener side 15 constituting the second closed cross-section structure portion 17. The first closed cross-section structure portion 7 and the second closed cross-section structure portion 17 are continuously joined to each other by joining the upper edge of the rear pillar inner side 16 that constitutes 17. Further, the first closed cross-section structure portion 7 and the second closed cross-section structure portion 17 on the left side are also joined in the same manner.
[0015]
Further, as shown in FIG. 8, the lower edge of the rear pillar inner side 16 constituting the second closed cross-section structure portion 17 at the connection portion 31 between each second closed cross-section structure portion 17 and the third closed cross-section structure portion 24. And the lower edge of the rear pillar stiffener side 15 constituting the second closed cross-section structure 17 and the third closed cross-section structure 24 are joined. The second closed cross-section structure portion 17 and the third closed cross-section structure portion 24 are continuously joined by joining the side edges of the rear panel 23.
[0016]
Accordingly, the tail gate opening 2 includes the first closed cross-section structure portion 7 having the left hinge attachment portion 3, the second closed cross-section structure portion 17 on the left side, the third closed cross-section structure portion 24, and the second closed cross-section structure on the right side. The first closed cross-section structure portion 7 having the structure portion 17 and the right hinge attachment portion 3 is reached, and has a substantially U-shaped closed cross-section structure portion facing upward (open) as a whole.
[0017]
As described above, the rear pillar stiffener upper 5 and the rear pillar stiffener side 15, and the rear pillar inner upper 6 and the rear pillar inner side 16 are joined at the connection portion 30 between the first closed cross-section structure portion 7 and the second closed cross-section structure portion 17. Therefore, the plate thickness of the member in the first closed cross-section structure portion 7 or the second closed cross-section structure portion 17 is smaller than the plate thickness of the members overlapped in the connection portion 30, and the second closed cross-section structure portion 17 and the second closed cross-section structure portion 17 In the connection portion 31 of the three closed cross-section structure portion 24, the rear pillar inner side 16 and the rear stiffener 22 and the rear pillar stiffener side 15 and the rear panel 23 are joined, so that the thickness of the member overlapped at the connection portion 31 is larger than the plate thickness. The plate thickness of the member in the second closed cross-section structure portion 17 or the third closed cross-section structure portion 24 can be reduced.
[0018]
FIG. 3 is a cross-sectional view taken along line BB in FIG. In the figure, the upper wall 5 ′ of the rear pillar stiffener upper 5 that constitutes the upper wall of the connecting portion 30 of the first closed cross-section structure portion 7 and the second closed cross-section structure portion 17 is provided with an electrical functional component of the tail gate 1, specifically Specifically, a hole 33 through which the license lamp of the tailgate 1 and the harness 34 to the wiper are inserted is formed. The rear pillar inner upper 6 has a hole 32 through which the harness 34 can be inserted into the vehicle interior.
On the other hand, a grommet 36 is attached to an attachment hole 35 formed in the roof panel 10. Therefore, the harness 34 is curved with a margin in a relatively wide space 37 that extends from the vehicle interior side to the side surrounded by the roof panel 10 and the rear pillar inner upper 6 through the two holes 32 and 33 and is sealed by the grommet 36. In this state, it is pulled out to the tail gate 1 (not shown).
[0019]
According to the above embodiment, the tail gate opening 2 is configured by continuously connecting the first closed cross-section structure portions 7, 7, the second closed cross-section structure portions 17, 17, and the third closed cross-section structure portion 24. Thus, it is possible to reduce the thickness of the members constituting each closed cross-section portion and to give strength to the closed cross-section structure, thereby achieving both weight reduction of the vehicle body and improvement in torsional rigidity.
That is, the tail gate opening 2 is continuously closed with a closed cross-sectional structure over almost the entire circumference so that the overall rigidity is improved. For example, the tail gate against the load acting on the vehicle body from the outer ring by the roll when turning the vehicle body The entire opening 2 can be countered by exhibiting high torsional rigidity.
[0020]
Therefore, the rear pillar stiffener upper 5 and the rear pillar inner upper 6, the rear pillar stiffener side 15 and the rear pillar inner side 16, and the rear stiffener constituting the first closed cross-section structure portion 7, the second closed cross-section structure portion 17, and the third closed cross-section structure portion 24. The plate thickness of the rear panel 22 and the rear panel 23 itself can be reduced, and the weight can be reduced.
[0021]
Moreover, since each said connection part 30 and 31 to which a big load acts is also formed in the closed cross-section structure, each stress between the adjacent connection parts 30 and 31 in which the stress which acts on this connection part 30 and 31 is small is small. It is possible to reduce the plate thickness of the members in the closed cross-section structures 7, 17, and 24, that is, the rear pillar stiffener upper 5 and the rear pillar inner upper 6, the rear stiffener side 15 and the rear pillar inner side 16, the rear stiffener 22 and the rear panel 23. Therefore, the weight of the vehicle body can be further reduced.
[0022]
In particular, the third closed cross-section structure 24 must be provided over the entire area of the lower side of the tailgate opening 2 in order to set the jack-up point, but the tailgate opening 2 that is not exposed to such a load. If the first closed cross-section structure portion 7 is formed on both sides of the upper side portion, it is not necessary to form a closed cross-section structure portion near the center portion. Can be achieved.
That is, the central portion of the upper side portion of the tailgate opening 2 having a lower torsional stress than the other portions is not a closed cross-section structure, and the first to third closed cross-section structures 7, 17, 24 are substantially directed upward. By forming the U-shape, the vehicle body can be further reduced in weight.
[0023]
Further, since the hole 33 is provided in the upper wall 5 ′ of the rear pillar stiffener upper 5, the third closed cross-section structure 2 to the second closed cross-section structure 17, and the second closed cross-section structure 17 to the second close A continuous closed cross-section structure portion can be ensured at a portion reaching the connection portion 30 between the cross-section structure portion 17 and the third closed cross-section structure portion 24.
Therefore, it is not necessary to provide the hole 33 for inserting the harness 34 in the vertical wall 5 ″ of the rear pillar stiffener upper 5. A highly rigid closed cross-section structure portion can be secured. The harness 34 has two holes 32, 33 from the vehicle interior side. Thus, the harness 34 can be easily routed because it can be bent and routed in a relatively wide space portion 37 that extends to the side surrounded by the roof panel 10 and the rear pillar inner upper 6.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, the tail gate opening is connected to the first closed cross-section structure portion and the second closed cross-section structure portion, and the third closed cross-section structure portion is connected. configured to reduce the thickness of the member constituting the respective closed cross-section portion, and to have a strength by closed cross, there is an effect that it is possible to achieve both the rigidity improving twisting the vehicle body weight.
In addition, the space between the first closed cross-section structure portion and the roof panel can be used to allow the harness to be inserted from the hole in the upper wall into the vehicle interior, and no hole is provided in the vertical wall of the connection portion. Since the closed cross-section structure portion can be secured in this way, the wiring work of the harness becomes easy.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a rear body structure of a van type automobile according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line SS of FIG.
FIG. 3 is a cross-sectional view taken along the line BB in FIG.
4 is a cross-sectional view taken along the line CC of FIG.
FIG. 5 is a cross-sectional view taken along the line DD of FIG.
6 is a cross-sectional view taken along line AA in FIG. 1. FIG.
FIG. 7 is a partially cutaway perspective view of the left connection portion 31 as viewed from above.
FIG. 8 is a partially cutaway perspective view of the right connection portion 30 as viewed from the vehicle interior side.
[Explanation of symbols]
2 Tail gate opening 5 Rear pillar stiffener upper 5 'Upper wall 5 "Vertical wall 6 Rear pillar inner upper 7 First closed cross-section structure 10 Roof panel 15 Rear pillar stiffener side 16 Rear pillar inner side 17 Second closed cross-section structure 22 Rear stiffener 23 Rear panel 24 Third closed cross-section structure part 30 Connection part 31 Connection part 33 Hole 34 Harness 37 Space part

Claims

A first closed cross section is provided, the side portions of the left and right of the tail gate opening at the rear pillar stiffener side and the rear pillar inner side formed by the rear pillar stiffener upper and rear pillar inner upper to upper portion of the tailgate opening constituted by a second closed section structure portion formed, a lower portion constituted by a third closed section structure portion formed by the Riyasutifuna and the rear panel, wherein the first closed cross section portion second closed cross section Are connected to each other, and a connection portion between the first closed cross-section structure portion and the second closed cross-section structure portion is formed in a closed cross section by the rear pillar stiffener upper having the vertical wall and the upper wall and the rear pillar inner upper. In addition, a space for routing the harness is provided between the upper wall and the roof panel, and a hole for inserting the harness to the tailgate is provided in the upper wall. Rear vehicle body structure of the van type motor vehicle, characterized in that the.