JP5110364B2

JP5110364B2 - Rear body structure

Info

Publication number: JP5110364B2
Application number: JP2007295127A
Authority: JP
Inventors: 周太笹山; 信哉薬丸
Original assignee: Suzuki Motor Corp
Current assignee: Suzuki Motor Corp
Priority date: 2007-11-14
Filing date: 2007-11-14
Publication date: 2012-12-26
Anticipated expiration: 2027-11-14
Also published as: JP2009119995A; DE102008057352B4; CN101434262A; CN101434262B; DE102008057352A1

Description

本発明は、
車両前後方向に延びる閉じ断面形状のサイドシルの後端部に、ホイールハウスアウタパネルとホイールハウスインナパネルとから成るホイールハウスを接合し、
前記サイドシルの内部に、前記サイドシルを補強するための車両前後方向に延びるサイドシルストレングスを設け、
前記サイドシルの後端開口のうち車幅方向外側の開口部分を前記ホイールハウスアウタパネルの前壁部で塞ぎ、車幅方向内側の開口部分を、アンダーボディ側のコンパートメントリヤパネルで塞いである後部車体構造に関する。 The present invention
A wheel house consisting of a wheel house outer panel and a wheel house inner panel is joined to the rear end of a side sill having a closed cross-sectional shape extending in the vehicle longitudinal direction.
A side sill strength extending in the vehicle front-rear direction for reinforcing the side sill is provided inside the side sill,
The present invention relates to a rear vehicle body structure in which an opening portion on the outer side in the vehicle width direction of the rear end opening of the side sill is closed with a front wall portion of the wheel house outer panel, and an opening portion on the inner side in the vehicle width direction is closed with a compartment rear panel on the underbody side. .

この種の後部車体構造では、サイドシルが閉じ断面形状に形成されて車両前後方向に延び、ホイールハウスが側面視半円形状に形成されていることから、断面の変化が大きくて各部に応力が集中しやすい。従って、上記後部車体構造の剛性を十分強くする必要がある。 In this type of rear body structure, the side sill is closed and formed in a cross-sectional shape and extends in the longitudinal direction of the vehicle, and the wheel house is formed in a semicircular shape when viewed from the side. It's easy to do. Therefore, it is necessary to sufficiently increase the rigidity of the rear body structure.

従来、前記サイドシルとホイールハウスとを接合する手段として、図１３の模式図に示すように、サイドシルストレングス５の後端部とホイールハウスアウタパネル２の前壁部１４との間に接合部材であるエクステンション３０を介在させ、エクステンション３０の前端部をサイドシルストレングス５の後端部に車幅方向Ｗで重ね合わせて溶接接合し、エクステンション３０の後端部を、アンダーボディ側のコンパートメントリヤパネル１０のフランジ１０Ｆに車幅方向Ｗで重ね合わせて溶接接合し、エクステンション３０の車両前後方向中間部を、ホイールハウスアウタパネル２のフランジ２Ｆに車幅方向Ｗで重ね合わせて溶接接合してあった。図１３において符号９はサイドボディアウタパネル、×印は溶接接合部を示している。 Conventionally, as means for joining the side sill and the wheel house, as shown in the schematic diagram of FIG. 13, an extension which is a joining member between the rear end portion of the side sill strength 5 and the front wall portion 14 of the wheel house outer panel 2. 30, the front end portion of the extension 30 is overlapped and welded to the rear end portion of the side sill strength 5 in the vehicle width direction W, and the rear end portion of the extension 30 is connected to the flange 10F of the compartment rear panel 10 on the underbody side. The vehicle longitudinal direction intermediate portion of the extension 30 was welded and joined to the flange 2F of the wheel house outer panel 2 in the vehicle width direction W. In FIG. 13, reference numeral 9 denotes a side body outer panel, and x denotes a weld joint.

上記従来の構造によれば、エクステンションとサイドシルストレングス等の各相手部材とを車幅方向で重ね合わせて溶接接合してあり、車両前後方向の入力があった場合、全ての溶接接合部にせん断力が加わるために、車両前後方向の入力に対して有利な構造とはいえなかった。 According to the above conventional structure, the extension and each other member such as side sill strength are overlapped and welded together in the vehicle width direction, and when there is input in the vehicle longitudinal direction, shear force is applied to all welded joints. Therefore, it cannot be said that the structure is advantageous for input in the vehicle longitudinal direction.

本発明の目的は、車両前後方向の入力に対して有利で耐久性のよい後部車体構造を提供する点にある。さらには、溶接作業性の良い後部車体構造を提供する点にある。 An object of the present invention is to provide a rear vehicle body structure that is advantageous and durable with respect to input in the vehicle longitudinal direction. Furthermore, the present invention is to provide a rear vehicle body structure with good welding workability.

本発明の特徴は、
車両前後方向に延びる閉じ断面形状のサイドシルの後端部に、ホイールハウスアウタパネルとホイールハウスインナパネルとから成るホイールハウスを接合し、
前記サイドシルの内部に、前記サイドシルを補強するための車両前後方向に延びるサイドシルストレングスを設け、
前記サイドシルの後端開口のうち車幅方向外側の開口部分を前記ホイールハウスアウタパネルの前壁部で塞ぎ、車幅方向内側の開口部分を、アンダーボディ側のコンパートメントリヤパネルで塞いである後部車体構造であって、
前記サイドシルストレングスの後端部を前記ホイールハウスアウタパネルの前壁部の外面に接合し、
断面Ｌ字状の接合部材の一片を前記ホイールハウスアウタパネルの前壁部の内面に重ね合わせて接合し、
前記接合部材の他片を、前記コンパートメントリヤパネルの車幅方向外側の側部に設けた側壁部に車幅方向外側から重ね合わせて接合してある点にある。（請求項１） The feature of the present invention is that
A wheel house consisting of a wheel house outer panel and a wheel house inner panel is joined to the rear end of a side sill having a closed cross-sectional shape extending in the vehicle longitudinal direction.
A side sill strength extending in the vehicle front-rear direction for reinforcing the side sill is provided inside the side sill,
A rear vehicle body structure in which an opening portion on the outer side in the vehicle width direction of the rear end opening of the side sill is closed with a front wall portion of the wheel house outer panel, and an opening portion on the inner side in the vehicle width direction is closed with a compartment rear panel on the underbody side. There,
The rear end of the side sill strength is joined to the outer surface of the front wall of the wheel house outer panel,
A piece of a joining member having an L-shaped cross section is overlapped and joined to the inner surface of the front wall portion of the wheel house outer panel,
The other piece of the joining member is overlapped and joined from the outside in the vehicle width direction to the side wall provided on the side portion of the compartment rear panel on the outside in the vehicle width direction. (Claim 1)

この構成によれば、サイドシルストレングスの後端部をホイールハウスアウタパネルの前壁部の外面に接合し、断面Ｌ字状の前記接合部材の一片をホイールハウスアウタパネルの前壁部の内面に重ね合わせて接合してあるから、車両前後方向の入力があった場合、サイドシルストレングスの後端部とホイールハウスアウタパネルの前壁部との接合部にせん断力が加わるのを抑制することができる。そして、車両前方側から入力があった場合、前記入力をサイドシルストレングスからホイールハウスアウタパネルに伝えやすくすることができる。さらに、接合部材の他片を、コンパートメントリヤパネルの車幅方向外側の側部に設けた側壁部に車幅方向外側から重ね合わせて接合してあるから、前記入力を、接合部材を介してアンダーボディ側のコンパートメントリヤパネルに確実に伝えることができる。これにより、後部車体構造の剛性を強くすることができる。（請求項１） According to this configuration, the rear end portion of the side sill strength is joined to the outer surface of the front wall portion of the wheel house outer panel, and one piece of the joining member having an L-shaped cross section is superimposed on the inner surface of the front wall portion of the wheel house outer panel. Since it has joined, when there exists the input of the vehicle front-back direction, it can suppress that a shear force is added to the junction part of the rear-end part of side sill strength, and the front wall part of a wheel house outer panel. When there is an input from the front side of the vehicle, the input can be easily transmitted from the side sill strength to the wheel house outer panel. Further, since the other piece of the joining member is overlapped and joined from the outside in the vehicle width direction to the side wall provided on the side portion on the outside in the vehicle width direction of the compartment rear panel, the input is connected to the underbody via the joining member. Can be reliably transmitted to the side compartment rear panel. As a result, the rigidity of the rear body structure can be increased. (Claim 1)

本発明において、
前記サイドシルストレングスの後端部に張り出し形成したフランジを、前記ホイールハウスアウタパネルの前壁部の外面に重ね合わせて接合してあると、サイドシルストレングスの後端部とホイールハウスアウタパネルの前壁部の外面との接合面積を大きくすることができて、車両前方側からの入力をより確実にホイールハウスアウタパネルに伝えることができる。（請求項２） In the present invention,
A flange that projects from the rear end portion of the side sill strength is overlapped and joined to the outer surface of the front wall portion of the wheel house outer panel, and the rear end portion of the side sill strength and the outer surface of the front wall portion of the wheel house outer panel And the input from the front side of the vehicle can be more reliably transmitted to the wheel house outer panel. (Claim 2)

本発明において、
前記サイドシルストレングスのフランジと前記接合部材の一片とで前記ホイールハウスアウタパネルの前壁部を挟み込んだ状態で、前記フランジと、前記ホイールハウスアウタパネルの前壁部と、前記接合部材の一片とを一体に溶接接合してあると、溶接接合部の強度をより強くすることができて、車両前方側からの入力を接合部材に伝えやすくすることができ、前記入力をより確実にコンパートメントリヤパネルに伝えることができる。（請求項３） In the present invention,
The flange, the front wall portion of the wheel house outer panel, and the piece of the joining member are integrated with the flange of the side sill strength and the piece of the joining member sandwiching the front wall portion of the wheel house outer panel. If it is welded, the strength of the welded joint can be increased, making it easier to transmit the input from the front side of the vehicle to the joining member, and more reliably transmitting the input to the compartment rear panel. it can. (Claim 3)

本発明において、
前記サイドシルを、サイドボディアウタパネルと、車幅方向外側に開口する断面ハット形状のサイドシルインナパネルとの上下両端部同士を接合して構成し、
前記サイドシルインナパネルの後端部と前記ホイールハウスインナパネルの前壁部との間に、車幅方向外側に開口する断面ハット形状のコンパートメントフロントパネルを介在させて、前記コンパートメントフロントパネルの前端部を前記サイドシルインナパネルの後端部に接合し、前記コンパートメントフロントパネルの上壁部の後端部に形成した立上がり壁を前記ホイールハウスインナパネルの前壁部の下端部に重ね合わせて接合してあると、次の作用を奏することができる。（請求項４） In the present invention,
The side sill is configured by joining the upper and lower ends of the side body outer panel and the side sill inner panel having a hat-shaped cross section that opens outward in the vehicle width direction,
Between the rear end portion of the side sill inner panel and the front wall portion of the wheel house inner panel, a compartment front panel having a hat-shaped cross section that opens outward in the vehicle width direction is interposed, and the front end portion of the compartment front panel is Joined to the rear end portion of the side sill inner panel, and the rising wall formed at the rear end portion of the upper wall portion of the compartment front panel is joined to the lower end portion of the front wall portion of the wheel house inner panel. The following actions can be achieved. (Claim 4)

サイドシルを、サイドボディアウタパネルと、車幅方向外側に開口する断面ハット形状のサイドシルインナパネルとの上下両端部同士を接合して構成したことで、サイドシルの剛性を強くすることができる。
また、コンパートメントフロントパネルの前端部をサイドシルインナパネルの後端部に接合し、コンパートメントフロントパネルの上壁部の後端部に形成した立上がり壁をホイールハウスインナパネルの前壁部の下端部に重ね合わせて接合したことで、ホイールハウス周りの後部車体構造の構造の剛性を強くすることができる。（請求項４） By configuring the side sill by joining the upper and lower ends of the side body outer panel and the side sill inner panel having a hat-shaped cross section that opens outward in the vehicle width direction, the rigidity of the side sill can be increased.
In addition, the front end of the compartment front panel is joined to the rear end of the side sill inner panel, and the rising wall formed at the rear end of the upper wall of the compartment front panel is overlapped with the lower end of the front wall of the wheel house inner panel. By joining together, the rigidity of the structure of the rear body structure around the wheel house can be increased. (Claim 4)

本発明において、
前記コンパートメントフロントパネルの側壁部の後端部に、前記コンパートメントリヤパネルの車幅方向内側の側部に設けた側壁部を車幅方向外側から重ね合わせて接合し、
前記コンパートメントフロントパネルの下壁部の後端部に、前記コンパートメントリヤパネルに設けた下壁部を上方から重ね合わせて接合してあると、次の作用を奏することができる。（請求項５） In the present invention,
The rear end portion of the side wall portion of the compartment front panel, joining the side wall portion provided in the vehicle width direction inner side of the compartment rear panel by overlapping the vehicle width direction outer side,
When the lower wall portion provided on the compartment rear panel is overlapped and joined to the rear end portion of the lower wall portion of the compartment front panel from above, the following effects can be achieved. (Claim 5)

サイドシルインナパネルの後端部に接合したコンパートメントフロントパネルにコンパートメントリヤパネルを強固に接合することができて、後部車体構造の構造の剛性を強くすることができる。（請求項５） The compartment rear panel can be firmly joined to the compartment front panel joined to the rear end of the side sill inner panel, and the rigidity of the structure of the rear vehicle body structure can be increased. (Claim 5)

本発明において、
前記接合部材の一片の下端部に車両後方側に延びる下壁部を設け、この下壁部から車幅方向内側に延びる状態に設けた延出下壁部を、前記コンパートメントリヤパネルの下壁部に上方から重ね合わせて接合してあると、接合部材をコンパートメントリヤパネルに強く固定することができて、車両前方側からの入力をコンパートメントリヤパネルにより確実に伝えることができる。（請求項６） In the present invention,
A lower wall portion extending toward the vehicle rear side is provided at a lower end portion of one piece of the joining member, and an extended lower wall portion provided so as to extend inward in the vehicle width direction from the lower wall portion is provided as a lower wall portion of the compartment rear panel. If they are overlapped and joined from above, the joining member can be firmly fixed to the compartment rear panel, and the input from the front side of the vehicle can be reliably transmitted to the compartment rear panel. (Claim 6)

本発明において、
リヤフロアの下面に車両前後方向に延びるリヤフロアサイドメンバを設け、
前記コンパートメントフロントパネルの側壁部を前記リヤフロアサイドメンバに接合してあると、コンパートメントリヤパネルによってリヤフロアの補強部材であるリヤフロアサイドメンバに接合部材が連結されて、後部車体構造の剛性をより強くすることができる。（請求項７） In the present invention,
A rear floor side member extending in the vehicle longitudinal direction is provided on the lower surface of the rear floor,
When the side wall of the compartment front panel is joined to the rear floor side member, the joining member is connected to the rear floor side member, which is a reinforcing member of the rear floor, by the compartment rear panel, so that the rigidity of the rear vehicle body structure can be further increased. it can. (Claim 7)

本発明によれば、車両前後方向の入力に対して有利で耐久性のよい後部車体構造を提供することができた。 ADVANTAGE OF THE INVENTION According to this invention, the rear vehicle body structure which was advantageous with respect to the input of the vehicle front-back direction and good durability could be provided.

以下、本発明を実施するための最良の形態を図面に基づいて説明する。図１〜図３に自動車の後部車体構造を示してある。各図に示すように、車両前後方向に延びる閉じ断面形状（図１２参照）のサイドシル１の後端部（車両前後方向の後端部、以下、同じ）に、ホイールハウスアウタパネル２とホイールハウスインナパネル３とから成るホイールハウス４を溶接接合し、サイドシル１の内部に、このサイドシル１を補強するための車両前後方向に延びるサイドシルストレングス５を設けてある。 Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. 1 to 3 show the rear body structure of an automobile. As shown in each figure, a wheel house outer panel 2 and a wheel house inner are provided at a rear end portion of a side sill 1 having a closed cross-sectional shape extending in the vehicle front-rear direction (see FIG. 12). A wheel house 4 comprising a panel 3 is welded and joined, and a side sill strength 5 extending in the vehicle front-rear direction for reinforcing the side sill 1 is provided inside the side sill 1.

また、サイドシル１の後端開口６（図３参照）のうち車幅方向外側Ｗ２の開口部分６Ａをホイールハウスアウタパネル２の第１前壁部１４で塞ぎ、車幅方向内側Ｗ１の開口部分６Ｂをアンダーボディ８０側のコンパートメントリヤパネル１０で塞いである。前記ホイールハウスアウタパネル２およびホイールハウスインナパネル３はサイドボディ７０側の部品であり、コンパートメントリヤパネル１０はアンダーボディ８０側の部品である。ここで、サイドボディ７０側の部品、アンダーボディ８０側の部品とは、車体作製上の部組構成を表現したものである。つまり、車体の製造上、サイドボディ部分（車体の左右部分）、アンダーボディ部分（車体の床周りとエンジンルーム部分）、ルーフ部分（屋根部分）に分割してそれぞれの部分を別々に組み立て、組みあがった各部分を接合して車体を構成する方法が採られており、サイドボディ７０側の部品とは予めサイドボディの部分として組み立てられ、アンダーボディ８０側の部品とは予めアンダーボディの部分として組み立てられ、その後、結合されて車両の車体構造となることを意味する。 Moreover, the opening part 6A of the vehicle width direction outer side W2 among the rear end openings 6 (see FIG. 3) of the side sill 1 is closed by the first front wall portion 14 of the wheel house outer panel 2, and the opening part 6B of the vehicle width direction inner side W1 is closed. It is closed with a compartment rear panel 10 on the underbody 80 side. The wheel house outer panel 2 and the wheel house inner panel 3 are parts on the side body 70 side, and the compartment rear panel 10 is a part on the under body 80 side. Here, the parts on the side body 70 side and the parts on the under body 80 side represent the structure of a part in manufacturing the vehicle body. In other words, in the production of the car body, it is divided into a side body part (right and left parts of the car body), an under body part (around the car body floor and the engine room part), and a roof part (roof part). A method is adopted in which the raised parts are joined to form a vehicle body. The parts on the side body 70 side are assembled in advance as parts of the side body, and the parts on the under body 80 side are preliminarily used as parts of the under body. It means assembled and then combined into a vehicle body structure.

［ホイールハウス４の構造］
前記ホイールハウスアウタパネル２は、第１上壁部（図示せず）と側面視円弧状の前記第１前壁部１４とを備えている。図２に示すように、ホイールハウスインナパネル３は、第２上壁部１５と、側面視円弧状の第２前壁部１６と、車幅方向内側Ｗ１に位置する第２側壁部１７とを備えている。第２側壁部１７の下端は上下方向で第２前壁部１６の下端と同一位置に位置して車両前後方向に水平に延びている。 [Structure of wheel house 4]
The wheel house outer panel 2 includes a first upper wall portion (not shown) and the first front wall portion 14 having an arc shape in a side view. As shown in FIG. 2, the wheel house inner panel 3 includes a second upper wall portion 15, a second front wall portion 16 that is arc-shaped in a side view, and a second side wall portion 17 that is located on the inner side W 1 in the vehicle width direction. I have. The lower end of the second side wall portion 17 is located at the same position as the lower end of the second front wall portion 16 in the vertical direction and extends horizontally in the vehicle front-rear direction.

ホイールハウスアウタパネル２の径方向外方側の端部とホイールハウスインナパネル３の径方向外方側の端部とには、互いに重なり合うフランジを径方向外方側に突設して両フランジ同士を溶接接合してある。 At the end portion on the radially outer side of the wheel house outer panel 2 and the end portion on the radially outer side of the wheel house inner panel 3, flanges that overlap each other are provided so as to protrude radially outward. It is welded.

［サイドシル１の構造］
図１２にも示すように、サイドシル１は、車幅方向外側Ｗ２のサイドボディアウタパネル９と、車幅方向内側Ｗ１のサイドシルインナパネル４１と、前記サイドシルストレングス５とを備えている。サイドボディアウタパネル９は車幅方向内側Ｗ１に開口する断面ハット形状に形成され、サイドシルストレングス５も車幅方向内側Ｗ１に開口する断面ハット形状に形成されている。 [Structure of side sill 1]
As shown in FIG. 12, the side sill 1 includes a side body outer panel 9 on the vehicle width direction outer side W 2, a side sill inner panel 41 on the vehicle width direction inner side W 1, and the side sill strength 5. The side body outer panel 9 is formed in a cross-sectional hat shape that opens in the vehicle width direction inner side W1, and the side sill strength 5 is also formed in a cross-sectional hat shape that opens in the vehicle width direction inner side W1.

詳しくは、サイドボディアウタパネル９の上側のフランジ９Ｆ１と、サイドシルインナパネル４１の上側のフランジ４１Ｆ１とで、サイドシルストレングス５の上側のフランジ５Ｆ１を挟み込んで、３枚のフランジ９Ｆ１，４１Ｆ１，５Ｆ１同士を溶接接合し、サイドボディアウタパネル９の下側のフランジ９Ｆ２と、サイドシルインナパネル４１の下側のフランジ４１Ｆ２とで、サイドシルストレングス５の下側のフランジ５Ｆ２を挟み込んで、３枚のフランジ９Ｆ２，４１Ｆ２，５Ｆ２同士を溶接接合することで前記サイドシル１を構成してある。この構造により、サイドシルストレングス５がサイドシル１の閉じ断面を左右に２分割している。 Specifically, the upper flange 5F1 of the side sill strength 5 is sandwiched between the upper flange 9F1 of the side body outer panel 9 and the upper flange 41F1 of the side sill inner panel 41, and the three flanges 9F1, 41F1, 5F1 are welded together. The lower flange 5F2 of the side sill strength 5 is sandwiched between the lower flange 9F2 of the side body outer panel 9 and the lower flange 41F2 of the side sill inner panel 41, and the three flanges 9F2, 41F2, 5F2 The side sill 1 is configured by welding the two together. With this structure, the side sill strength 5 divides the closed cross section of the side sill 1 into left and right parts.

前記サイドボディアウタパネル９の上側のフランジ９Ｆ１と下側のフランジ９Ｆ２はサイドボディアウタパネル９のそれぞれ上端部と下端部に相当し、サイドシルインナパネル４１の上側のフランジ４１Ｆ１と下側のフランジ４１Ｆ２はサイドシルインナパネル４１のそれぞれ上端部と下端部に相当する。サイドボディアウタパネル９はサイドボディ７０側の部品であり、サイドシルインナパネル４１はアンダーボディ８０側の部品である。 The upper flange 9F1 and the lower flange 9F2 of the side body outer panel 9 correspond to the upper end and the lower end of the side body outer panel 9, respectively. The upper flange 41F1 and the lower flange 41F2 of the side sill inner panel 41 are side sill inners. Each of the panels 41 corresponds to an upper end portion and a lower end portion. The side body outer panel 9 is a part on the side body 70 side, and the side sill inner panel 41 is a part on the under body 80 side.

サイドシルストレングス５の後端部側においては、サイドボディアウタパネル９の上側のフランジ９Ｆ１と、後述のコンパートメントフロントパネル２０の上側のフランジ２０Ｆ１との間に、サイドシルストレングス５の上側のフランジ５Ｆ１を配置し、サイドボディアウタパネル９の下側のフランジ９Ｆ２と、コンパートメントフロントパネル２０の下側のフランジ２０Ｆ２との間に、サイドシルストレングス５の下側のフランジ５Ｆ２を配置してある。 On the rear end side of the side sill strength 5, an upper flange 5F1 of the side sill strength 5 is disposed between an upper flange 9F1 of the side body outer panel 9 and an upper flange 20F1 of a compartment front panel 20 described later. The lower flange 5F2 of the side sill strength 5 is disposed between the lower flange 9F2 of the side body outer panel 9 and the lower flange 20F2 of the compartment front panel 20.

図３〜図６に示すように、サイドシルストレングス５の後端部に複数の長方形状のフランジ５Ｆ３を径方向外方側に向かって張り出し形成し、この複数のフランジ５Ｆ３を、ホイールハウスアウタパネル２の第１前壁部１４の外面１４Ｇ（ホイールハウス４の内外方向で外側の面）に車両前方側Ｆｒから重ね合わせてある。 As shown in FIGS. 3 to 6, a plurality of rectangular flanges 5 F 3 are formed to protrude radially outward at the rear end portion of the side sill strength 5, and the plurality of flanges 5 F 3 are formed on the wheel house outer panel 2. It overlaps with the outer surface 14G of the first front wall portion 14 (the outer surface in the inner and outer directions of the wheel house 4) from the vehicle front side Fr.

そして、図１，図２，図４〜図６に示すように、ホイールハウスアウタパネル２の第１前壁部１４の内面１４Ｎに、横断面Ｌ字状の縦に長い板材から成る接合部材３０の一片３１を車両後方側から重ね合わせ、サイドシルストレングス５のフランジ５Ｆ３と接合部材３０の一片３１とで前記第１前壁部１４を挟み込んだ状態で、サイドシルストレングス５のフランジ５Ｆ３と、前記第１前壁部１４と、接合部材３０の一片３１との三者を一体に溶接接合してある。 As shown in FIGS. 1, 2, 4 to 6, a joining member 30 made of a vertically long plate member having an L-shaped cross section is formed on the inner surface 14 N of the first front wall portion 14 of the wheel house outer panel 2. One piece 31 is overlapped from the vehicle rear side, and the flange 5F3 of the side sill strength 5 is sandwiched between the flange 5F3 of the side sill strength 5 and the piece 31 of the joining member 30, and the flange 5F3 of the side sill strength 5 and the first front The three of the wall portion 14 and one piece 31 of the joining member 30 are integrally welded.

本実施形態では前記フランジ５Ｆ３を３個、サイドシルストレングス５の周方向に分散配置してあり（図３参照）、１個のフランジ５Ｆ３がサイドシルストレングス５の上壁部４７に、他の１個のフランジ５Ｆ３がサイドシルストレングス５の側壁部４８に、残りの１個のフランジ５Ｆ３がサイドシルストレングス５の下壁部４９にそれぞれ形成されている。そして、サイドシルストレングス５の上壁部４７に形成されたフランジ５Ｆ３と、下壁部４９に形成されたフランジ５Ｆ３とが、接合部材３０の一片３１と共に前記第１前壁部１４を挟み込んでいる（図５参照）。 In the present embodiment, three flanges 5F3 are distributed in the circumferential direction of the side sill strength 5 (see FIG. 3), and one flange 5F3 is placed on the upper wall 47 of the side sill strength 5 and another one The flange 5F3 is formed on the side wall 48 of the side sill strength 5, and the remaining one flange 5F3 is formed on the lower wall 49 of the side sill strength 5. The flange 5F3 formed on the upper wall portion 47 of the side sill strength 5 and the flange 5F3 formed on the lower wall portion 49 sandwich the first front wall portion 14 together with the piece 31 of the joining member 30 ( (See FIG. 5).

さらに、接合部材３０の他片３２を、コンパートメントリヤパネル１０の車幅方向外側Ｗ２の側部に設けた側壁部３５（後述の第４側壁部３５）に車幅方向外側Ｗ２から重ね合わせるとともに溶接接合して、サイドシル１の後端部とコンパートメントリヤパネル１０を前記接合部材３０を介して接合してある。 Further, the other piece 32 of the joining member 30 is overlapped from the vehicle width direction outer side W2 on the side wall portion 35 (the fourth side wall portion 35 described later) provided on the side portion of the compartment rear panel 10 on the vehicle width direction outer side W2, and welded. The rear end of the side sill 1 and the compartment rear panel 10 are joined via the joining member 30.

図１，図４，図６に示すように、サイドボディアウタパネル９の後端部に車幅方向内側Ｗ１に張り出すフランジ９Ｆ３を形成してあり、このフランジ９Ｆ３を、ホイールハウスアウタパネル２に形成した車幅方向内側Ｗ１に張り出すフランジ２Ｆ１に車両後方側から重ね合わせてある。 As shown in FIGS. 1, 4, and 6, a flange 9 F 3 is formed at the rear end portion of the side body outer panel 9 so as to project toward the inner side W 1 in the vehicle width direction. It overlaps with the flange 2F1 protruding from the vehicle width direction inner side W1 from the vehicle rear side.

［コンパートメントフロントパネル２０の構造］
コンパートメントフロントパネル２０はアンダーボディ８０側の部品であり、図２，図３，図９（ａ）〜図９（ｃ）に示すように、車幅方向外側Ｗ２に開口する断面ハット形状に形成されて、サイドシルインナパネル４１の後端部とホイールハウスインナパネル３の第２前壁部１６との間に介在している。すなわち、コンパートメントフロントパネル２０の前端部をサイドシルインナパネル４１の後端部に溶接接合し、コンパートメントフロントパネル２０の第３上壁部１９の後端部に形成した立ち上がり壁１８をホイールハウスインナパネル３の第２前壁部１６の下端部１６Ｋに車両後方側から重ね合わせて溶接接合してある。 [Structure of compartment front panel 20]
The compartment front panel 20 is a part on the underbody 80 side, and is formed in a cross-sectional hat shape that opens to the outer side W2 in the vehicle width direction as shown in FIG. 2, FIG. 3, FIG. 9 (a) to FIG. 9 (c). Thus, it is interposed between the rear end portion of the side sill inner panel 41 and the second front wall portion 16 of the wheel house inner panel 3. That is, the front end portion of the compartment front panel 20 is welded and joined to the rear end portion of the side sill inner panel 41, and the rising wall 18 formed at the rear end portion of the third upper wall portion 19 of the compartment front panel 20 is connected to the wheel house inner panel 3. The second front wall portion 16 is overlapped and welded to the lower end portion 16K of the second front wall portion 16 from the vehicle rear side.

図９（ａ）〜図９（ｃ）に示すように、コンパートメントフロントパネル２０の第３上壁部１９は、水平な前側第３上壁部分１９Ａと、前側第３上壁部分１９Ａの後端から後ろ上方に延びる後ろ側第３上壁部分１９Ｂとから成る。前側第３上壁部分１９Ａは幅が一定に設定され、後ろ側第３上壁部分１９Ｂは、車幅方向内側Ｗ１の側部が後ろ側ほど車幅方向内側Ｗ１に位置し、後ろ側第３上壁部分１９Ｂの後端縁１９Ｂ１は、車幅方向外側Ｗ２ほど車両前方側Ｆｒに位置する平面視円弧状に形成されている。この後ろ側第３上壁部分１９Ｂの後端部に、前記後端縁１９Ｂ１に沿うように前記立ち上がり壁１８を形成してある。立ち上がり壁１８は、接合対象のホイールハウスインナパネル３の第２前壁部１６の下端部１６Ｋの形状に対応して、後ろ上がりに傾斜した状態に立ち上がっている。 As shown in FIGS. 9A to 9C, the third upper wall portion 19 of the compartment front panel 20 includes a horizontal front third upper wall portion 19A and a rear end of the front third upper wall portion 19A. And a rear third upper wall portion 19B extending upward and rearward. The front third upper wall portion 19A has a constant width, and the rear third upper wall portion 19B is located on the inner side W1 in the vehicle width direction as the rear side is closer to the rear side. The rear end edge 19B1 of the upper wall portion 19B is formed in a circular arc shape in plan view that is located on the vehicle front side Fr toward the vehicle width direction outer side W2. The rising wall 18 is formed at the rear end portion of the rear side third upper wall portion 19B along the rear end edge 19B1. The rising wall 18 rises in a state of being inclined rearward in correspondence with the shape of the lower end portion 16K of the second front wall portion 16 of the wheel house inner panel 3 to be joined.

コンパートメントフロントパネル２０の第３側壁部２２は、前側第３上壁部分１９Ａの下方位置する前側第３側壁部分２２Ａと、後ろ側第３上壁部分１９Ｂの下方に位置する後ろ側第３側壁部分２２Ｂとから成る。前側第３側壁部分２２Ａの上下方向の幅は一定に設定されている。また、後ろ側第３側壁部分２２Ｂの上端は、後ろ側第３上壁部分１９Ｂに対応して後ろ上がりに傾斜し、後ろ側第３側壁部分２２Ｂの後端部の下端は後ろ下がりに緩やかに傾斜している。 The third side wall portion 22 of the compartment front panel 20 includes a front third side wall portion 22A positioned below the front third upper wall portion 19A and a rear third side wall portion positioned below the rear third upper wall portion 19B. 22B. The vertical width of the front third side wall portion 22A is set to be constant. Further, the upper end of the rear third side wall portion 22B is inclined rearwardly upward corresponding to the rear third upper wall portion 19B, and the lower end of the rear end portion of the rear third side wall portion 22B is gently lowered rearward. Inclined.

コンパートメントフロントパネル２０の第３下壁部２３は、車両前後方向に水平に延びる前側第３下壁部分２３Ａと、後ろ側第３側壁部分２２Ｂの後端部の下方に位置し、後ろ側第３側壁部分２２Ｂの後端部に対応して緩やかに傾斜した後ろ下がりの後ろ側第３下壁部分２３Ｂとから成る。前記後ろ側第３側壁部分２２Ｂと後ろ側第３下壁部分２３Ｂの後端部に、車幅方向外側Ｗ２と上方に張り出す一連のフランジ２０Ｆ３（図２，図４，図６図９（ｂ），図９（ｃ）参照）を設けてある。 The third lower wall portion 23 of the compartment front panel 20 is positioned below the rear end portion of the front third lower wall portion 23A and the rear third side wall portion 22B extending horizontally in the vehicle front-rear direction. It consists of a rear lower third lower wall portion 23B which is gently inclined to correspond to the rear end portion of the side wall portion 22B. A series of flanges 20F3 projecting outward in the vehicle width direction W2 and upward at the rear end portions of the rear third side wall portion 22B and the rear third lower wall portion 23B (FIGS. 2, 4, 6 and 9B) ) And FIG. 9 (c)).

図７，図８に示すように、リヤフロアの下面に車両前後方向に延びる左右一対のリヤフロアサイドメンバ６０を設けてあり、前記コンパートメントフロントパネル２０の後ろ側第３側壁部分２２Ｂをリヤフロアサイドメンバ６０の前端側の側部に溶接接合してある。左右一対のリヤフロアサイドメンバ６０の前端部間には第１クロスメンバ６１を架設し、左右一対のリヤフロアサイドメンバ６０の長手方向中間部間には第２クロスメンバ６２を架設してある。第２クロスメンバ６２の長手方向中央部からは、フック部材が取り付けられるメンバ６３が車両後方側に向かってリヤフロアに設けられたスペアタイヤ収納部の下面に沿って延出している。また、図８，図３に示すように、リヤフロアサイドメンバ６０には、その下方にサスペンションアーム取付けブラケット４５が配置固定されている。 As shown in FIGS. 7 and 8, a pair of left and right rear floor side members 60 extending in the vehicle front-rear direction are provided on the lower surface of the rear floor, and the rear third side wall portion 22 B of the compartment front panel 20 is connected to the rear floor side member 60. It is welded to the side portion on the front end side. A first cross member 61 is installed between the front end portions of the pair of left and right rear floor side members 60, and a second cross member 62 is installed between the longitudinal intermediate portions of the pair of left and right rear floor side members 60. From the central portion in the longitudinal direction of the second cross member 62, a member 63 to which a hook member is attached extends along the lower surface of the spare tire storage portion provided on the rear floor toward the vehicle rear side. As shown in FIGS. 8 and 3, a suspension arm mounting bracket 45 is disposed and fixed below the rear floor side member 60.

［コンパートメントリヤパネル１０の構造］（４）
図２，図３，図６，図１１（ａ），図１１（ｂ）に示すように、コンパートメントリヤパネル１０は、サイドシル１の前記開口部分６Ｂを塞ぐパネル本体部３３と、パネル本体部３３の車幅方向内側Ｗ１の側部から車両後方側に張り出す内側第４側壁部３４（コンパートメントリヤパネルの車幅方向内側の側部に設けた側壁部に相当）と、パネル本体部３３の車幅方向外側Ｗ２の側部から車両後方側に張り出す外側第４側壁部３５（コンパートメントリヤパネルの車幅方向外側の側部に設けた側壁部に相当）と、パネル本体部３３の下端部から車両後方側に張り出す第４下壁部３６と、第４下壁部３６の車幅方向外側Ｗ２の側部から下方に突出するフランジ１０Ｆ１とを備えている。 [Structure of compartment rear panel 10] (4)
As shown in FIGS. 2, 3, 6, 11 (a), and 11 (b), the compartment rear panel 10 includes a panel main body 33 that closes the opening 6 B of the side sill 1, and a panel main body 33. An inner fourth side wall portion 34 (corresponding to a side wall portion provided on the inner side in the vehicle width direction of the compartment rear panel) that protrudes from the side portion on the inner side W1 in the vehicle width direction, and the vehicle width direction of the panel main body portion 33 An outer fourth side wall portion 35 (corresponding to a side wall portion provided on the outer side in the vehicle width direction of the compartment rear panel) projecting from the side portion of the outer side W2 to the rear side of the vehicle from the lower end portion of the panel main body portion 33. And a flange 10 F 1 that protrudes downward from the side of the vehicle width direction outer side W 2 of the fourth lower wall portion 36.

コンパートメントリヤパネル１０の下側のフランジ１０Ｆ１は、サイドボディアウタパネル９の下側のフランジ９Ｆ２とコンパートメントフロントパネル２０の下側のフランジ２０Ｆ２とに挟持されている。また、サイドボディアウタパネル９の下側のフランジ９Ｆ２とコンパートメントリヤパネル１０の下側のフランジ１０Ｆ１との間には、ホイールハウスアウタパネル２の下端側に設けた径方向外方側に突出するフランジ２Ｆ２が介在している。そして、サイドボディアウタパネル９の下側のフランジ９Ｆ２と、ホイールハウスアウタパネル２の下端側に設けた径方向外方側に突出するフランジ２Ｆ２と、コンパートメントリヤパネル１０の下側のフランジ１０Ｆ１と、コンパートメントフロントパネル２０の下側のフランジ２０Ｆ２とを重ね合わせて一体に溶接接合してある。 The lower flange 10F1 of the compartment rear panel 10 is sandwiched between the lower flange 9F2 of the side body outer panel 9 and the lower flange 20F2 of the compartment front panel 20. Further, between the lower flange 9F2 of the side body outer panel 9 and the lower flange 10F1 of the compartment rear panel 10, a flange 2F2 provided on the lower end side of the wheel house outer panel 2 and projecting radially outward is interposed. is doing. The lower flange 9F2 of the side body outer panel 9, the flange 2F2 projecting radially outward provided on the lower end side of the wheel house outer panel 2, the lower flange 10F1 of the compartment rear panel 10, and the compartment front panel 20 and the lower flange 20F2 are overlapped and welded together.

前記パネル本体部３３の下半部は上半部よりも幅狭に形成されて上半部と下半部の間の接続部が上広がりの上下逆台形状に形成されている。そして、パネル本体部３３の上端部３３Ｊをコンパートメントフロントパネル２０の立ち上がり壁１８に重ね合わせて溶接接合してある。 The lower half of the panel body 33 is formed to be narrower than the upper half, and the connection between the upper half and the lower half is formed in an upside down inverted trapezoidal shape. And the upper end part 33J of the panel main-body part 33 is piled up on the standing wall 18 of the compartment front panel 20, and is weld-joined.

図６に示すように、コンパートメントフロントパネル２０の後ろ側第３側壁部分２２Ｂの下半部に、コンパートメントリヤパネル１０の内側第４側壁部３４の下半部を車幅方向外側Ｗ２から重ね合わせてある。さらに、これらの後ろ側第３側壁部分２２Ｂと内側第４側壁部３４を、下側開放のサスペンションアーム取付けブラケット４５（図１，図３参照）の側壁部４５Ｓに車幅方向外側Ｗ２から重ね合わせて、前記内側第４側壁部３４の下半部と、後ろ側第３側壁部分２２Ｂの下半部と、サスペンションアーム取付けブラケット４５の側壁部４５Ｓとの三者を一体に溶接接合してある。 As shown in FIG. 6, the lower half portion of the inner fourth side wall portion 34 of the compartment rear panel 10 is overlapped with the lower half portion of the rear third side wall portion 22B of the compartment front panel 20 from the vehicle width direction outer side W2. . Further, the rear third side wall portion 22B and the inner fourth side wall portion 34 are overlapped on the side wall portion 45S of the suspension arm mounting bracket 45 (see FIGS. 1 and 3) with the lower side opened from the outer side W2 in the vehicle width direction. The lower half of the inner fourth side wall 34, the lower half of the rear third side wall 22B, and the side wall 45S of the suspension arm mounting bracket 45 are integrally welded together.

このように、コンパートメントフロントパネル２０の後ろ側第３側壁部分２２Ｂと、コンパートメントリヤパネル１０の内側第４側壁部３４とはサスペンションアーム取付けブラケット４５と共にサスペンションアームの取付け部４６を構成している。 Thus, the rear third side wall portion 22B of the compartment front panel 20 and the inner fourth side wall portion 34 of the compartment rear panel 10 together with the suspension arm mounting bracket 45 constitute a suspension arm mounting portion 46.

後ろ側第３側壁部分２２Ｂと内側第４側壁部３４にはサスペンションアーム取付け用の取付け孔４５Ｈを形成し、コンパートメントリヤパネル１０の内側第４側壁部３４の車幅方向外側Ｗ２の面には、サスペンションアーム取付け用のボルトを螺合させるナットＮを溶接固着してある（図６参照）。 A mounting hole 45H for mounting a suspension arm is formed in the rear third side wall portion 22B and the inner fourth side wall portion 34, and the suspension is mounted on the surface of the inner fourth side wall portion 34 of the compartment rear panel 10 on the outer side in the vehicle width direction W2. A nut N for screwing an arm mounting bolt is fixed by welding (see FIG. 6).

また、コンパートメントフロントパネル２０の後ろ側第３下壁部分２３Ｂに、コンパートメントリヤパネル１０の第４下壁部３６（コンパートメントリヤパネルに設けた下壁部に相当）を上方から重ね合わせて溶接接合してある。 Further, a fourth lower wall portion 36 (corresponding to a lower wall portion provided on the compartment rear panel) of the compartment rear panel 10 is overlapped and welded to the rear third lower wall portion 23B of the compartment front panel 20 from above. .

そして、コンパートメントリヤパネル１０の内側第４側壁部３４と第４下壁部３６に、車幅方向外側Ｗ２と上方に張り出す一連のフランジ１０Ｆ２を形成してある。このフランジ１０Ｆ２は、コンパートメントフロントパネル２０の後端側のフランジ２０Ｆ３に車両後方側から覆われている（図４，図６参照）。 A series of flanges 10F2 projecting outward in the vehicle width direction W2 and upward are formed on the inner fourth side wall 34 and the fourth lower wall 36 of the compartment rear panel 10. The flange 10F2 is covered from the vehicle rear side by a flange 20F3 on the rear end side of the compartment front panel 20 (see FIGS. 4 and 6).

［接合部材３０の構造］
図１０（ａ），図１０（ｂ）に示すように、前記接合部材３０の一片３１を、ホイールハウスアウタパネル２の第１前壁部１４の内面１４Ｎに対応させて上端側ほど車両後方側に位置するように傾斜させ、図２にも示すように、前記一片３１の車幅方向内側Ｗ１の側部を、コンパートメントリヤパネル１０の外側第４側壁部３５に対応させて車幅方向で折曲した形状に形成してある。 [Structure of Joining Member 30]
As shown in FIGS. 10 (a) and 10 (b), one piece 31 of the joining member 30 is made to correspond to the inner surface 14N of the first front wall portion 14 of the wheel house outer panel 2 and toward the vehicle rear side toward the upper end side. As shown in FIG. 2, the side portion of the one piece 31 on the inner side W1 in the vehicle width direction is bent in the vehicle width direction so as to correspond to the outer fourth side wall portion 35 of the compartment rear panel 10. It is formed into a shape.

詳しくは、前記側部の上半部と下半部の間を車幅方向で折曲して、前記上半部を下半部よりも車幅方向外側Ｗ２に配置するとともに、前記上半部を上端側ほど車幅方向外側Ｗ２に位置するように傾斜させ、前記下半部を鉛直に形成してある。
接合部材３０の他片３２は、前記一片３１の車幅方向内側Ｗ１の折曲した側部から車両後方側に延びており、上半部は幅が一定に設定され、下半部は上半部よりも幅狭に設定されている。 Specifically, the side portion is bent between the upper half portion and the lower half portion in the vehicle width direction, and the upper half portion is disposed on the outer side W2 in the vehicle width direction with respect to the lower half portion. Is inclined so as to be located on the outer side W2 in the vehicle width direction toward the upper end side, and the lower half portion is formed vertically.
The other piece 32 of the joining member 30 extends from the bent side of the inner side W1 of the one piece 31 to the vehicle rear side, the upper half is set to have a constant width, and the lower half is the upper half. It is set narrower than the part.

前述のように、前記接合部材３０の一片３１をホイールハウスアウタパネル２の第１前壁部１４の内面１４Ｎに溶接接合し、他片３２をコンパートメントリヤパネル１０の第４側壁部３５に車幅方向外側Ｗ２から重ね合わせて溶接接合してある。 As described above, one piece 31 of the joining member 30 is welded and joined to the inner surface 14N of the first front wall portion 14 of the wheel house outer panel 2, and the other piece 32 is joined to the fourth side wall portion 35 of the compartment rear panel 10 in the vehicle width direction outside. Overlap from W2 and welded.

また、接合部材３０の一片３１の下端部に車両後方側に延びる第５下壁部３８を設け、第５下壁部３８をホイールハウスアウタパネル２の第１前壁部１４の車両後方側に向かう下端部に上方から重ね合わせてある（図５参照）。そして、前記第５下壁部３８から車幅方向内側Ｗ１に延びる状態に設けた延出下壁部３９を、コンパートメントリヤパネル１０の第４下壁部３６に上方から重ね合わせて溶接接合してある。 Further, a fifth lower wall portion 38 extending toward the vehicle rear side is provided at the lower end portion of the piece 31 of the joining member 30, and the fifth lower wall portion 38 is directed toward the vehicle rear side of the first front wall portion 14 of the wheel house outer panel 2. It is superimposed on the lower end from above (see FIG. 5). And the extended lower wall part 39 provided in the state extended in the vehicle width direction inner side W1 from the said 5th lower wall part 38 overlaps with the 4th lower wall part 36 of the compartment rear panel 10 from the upper part, and is weld-joined. .

図６に示すように、サイドシル１の後端部側においては、車幅方向外側Ｗ２から順に、サイドボディアウタパネル９の下側のフランジ９Ｆ２と、サイドシルストレングス５の下側のフランジ５Ｆ２と、ホイールハウスアウタパネル２の下端側に設けた径方向外方側に突出するフランジ２Ｆ２と、コンパートメントフロントパネル２０の下側のフランジ２０Ｆ２とを重ね合わせて一体に溶接接合してある。 As shown in FIG. 6, on the rear end side of the side sill 1, the lower flange 9F2 of the side body outer panel 9, the lower flange 5F2 of the side sill strength 5, A flange 2F2 projecting radially outward provided on the lower end side of the outer panel 2 and a flange 20F2 on the lower side of the compartment front panel 20 are overlapped and welded together.

後部車体構造の斜視図Rear view of rear body structure 後部車体構造の分解斜視図Rear perspective view of rear body structure 後部車体構造の一部切欠き斜視図（ホイールハウスアウタパネルとホイールハウスインナパネルと接合部材とを省いてある一部切欠き斜視図）Partially cutaway perspective view of the rear body structure (partially cutaway perspective view with the wheel house outer panel, wheel house inner panel and joining member omitted) 図１のＣ−Ｃ断面図CC sectional view of FIG. 図１のＢ−Ｂ断面図BB sectional view of FIG. 図１のＤ−Ｄ断面図（前下がりの斜めの切断面で切断した断面図）1 is a cross-sectional view taken along the line DD in FIG. リヤフロアサイドメンバを示す平面図Plan view showing rear floor side member リヤフロアサイドメンバを示す側面図Side view showing rear floor side member （ａ）はコンパートメントフロントパネルの平面図（ｂ）はコンパートメントフロントパネルの側面図（ｃ）は図９（ｂ）のＡ矢視図(A) is a plan view of the compartment front panel (b) is a side view of the compartment front panel (c) is a view as seen from the arrow A in FIG. 9 (b) （ａ）は接合部材の平面図（ｂ）は接合部材の側面図(A) is a plan view of the joining member (b) is a side view of the joining member （ａ）はコンパートメントリヤパネルの平面図（ｂ）はコンパートメントリヤパネルの後面図(A) is a plan view of the compartment rear panel (b) is a rear view of the compartment rear panel サイドシルの断面図Cross section of side sill 従来の技術を示す模式図Schematic diagram showing conventional technology

Explanation of symbols

１サイドシル
２ホイールハウスアウタパネル
３ホイールハウスインナパネル
４ホイールハウス
５サイドシルストレングス
５Ｆ３フランジ（サイドシルストレングスの後端部に張り出し形成したフランジ）
６後端開口（サイドシルの後端開口）
６Ａ車幅方向外側の開口部分
６Ｂ車幅方向内側の開口部分
９サイドボディアウタパネル
９Ｆ１サイドボディアウタパネルの上端部（サイドボディアウタパネルの上側のフランジ）
９Ｆ２サイドボディアウタパネルの下端部（サイドボディアウタパネルの下側のフランジ）
１０コンパートメントリヤパネル
１４前壁部（第１前壁部（ホイールハウスアウタパネルの前壁部））
１４Ｇ外面（ホイールハウスアウタパネルの前壁部の外面）
１４Ｎ内面（ホイールハウスアウタパネルの前壁部の内面）
１６前壁部（第２前壁部（ホイールハウスインナパネルの前壁部））
１６Ｋ下端部（ホイールハウスインナパネルの前壁部の下端部）
１８立ち上がり壁
１９上壁部（第３上壁部（コンパートメントフロントパネルの上壁部））
２０コンパートメントフロントパネル
２２側壁部（第３側壁部（コンパートメントフロントパネルの側壁部））
２３下壁部（第３下壁部（コンパートメントフロントパネルの下壁部））
３０接合部材
３１一片
３２他片
３４側壁部（内側第４側壁部（コンパートメントリヤパネルの車幅方向内側の側部に設けた側壁部）
３５側壁部（外側第４側壁部（コンパートメントリヤパネルの車幅方向外側の側部に設けた側壁部））
３６下壁部（第４下壁部（コンパートメントリヤパネルに設けた下壁部））
３８下壁部（第５下壁部（接合部材の一片の下端部に設けた下壁部）
３９延出下壁部
４１サイドシルインナパネル
４１Ｆ１サイドシルインナパネルの上端部（サイドシルインナパネルの上側のフランジ）
４１Ｆ２サイドシルインナパネルの下端部（サイドシルインナパネルの下側のフランジ）
６０リヤフロアサイドメンバ
８０アンダーボディ
Ｗ１車幅方向内側
Ｗ２車幅方向外側 1 Side sill 2 Wheel house outer panel 3 Wheel house inner panel 4 Wheel house 5 Side sill strength 5F3 Flange (flange projecting from the rear end of the side sill strength)
6 Rear end opening (rear end opening of side sill)
6A Opening portion on the outer side in the vehicle width direction 6B Opening portion on the inner side in the vehicle width direction 9 Side body outer panel 9F1 Upper end portion of the side body outer panel (upper flange of the side body outer panel)
9F2 Lower end of the side body outer panel (lower flange of the side body outer panel)
10 compartment rear panel 14 front wall part (first front wall part (front wall part of wheel house outer panel))
14G outer surface (outer surface of the front wall of the wheel house outer panel)
14N Inner surface (the inner surface of the front wall of the wheel house outer panel)
16 Front wall (second front wall (front wall of the wheelhouse inner panel))
16K lower end (lower end of front wall of wheel house inner panel)
18 Standing wall 19 Upper wall (third upper wall (upper wall of compartment front panel))
20 compartment front panel 22 side wall (third side wall (side wall of compartment front panel))
23 Lower wall (third lower wall (lower wall of compartment front panel))
30 Joining member 31 One piece 32 Other piece 34 Side wall part (inside fourth side wall part (side wall part provided on the side part inside the vehicle width direction of the compartment rear panel))
35 side wall (outside fourth side wall (side wall provided on the side of the compartment rear panel outside in the vehicle width direction))
36 Lower wall portion (fourth lower wall portion (lower wall portion provided on the compartment rear panel))
38 lower wall portion (fifth lower wall portion (lower wall portion provided at the lower end of one piece of the joining member)
39 Extension lower wall part 41 Side sill inner panel 41F1 Upper end part of side sill inner panel (upper flange of side sill inner panel)
41F2 Lower end of side sill inner panel (lower flange of side sill inner panel)
60 Rear floor side member 80 Underbody W1 Vehicle width direction inside W2 Vehicle width direction outside

Claims

A wheel house consisting of a wheel house outer panel and a wheel house inner panel is joined to the rear end of a side sill having a closed cross-sectional shape extending in the vehicle longitudinal direction.
A side sill strength extending in the vehicle front-rear direction for reinforcing the side sill is provided inside the side sill,
A rear vehicle body structure in which an opening portion on the outer side in the vehicle width direction of the rear end opening of the side sill is closed with a front wall portion of the wheel house outer panel, and an opening portion on the inner side in the vehicle width direction is closed with a compartment rear panel on the underbody side. There,
The rear end of the side sill strength is joined to the outer surface of the front wall of the wheel house outer panel,
A piece of a joining member having an L-shaped cross section is overlapped and joined to the inner surface of the front wall portion of the wheel house outer panel,
A rear vehicle body structure in which the other piece of the joining member is overlapped and joined from the outside in the vehicle width direction to a side wall provided on a side portion on the outside in the vehicle width direction of the compartment rear panel.

The rear vehicle body structure according to claim 1, wherein a flange projecting from a rear end portion of the side sill strength is overlapped and joined to an outer surface of a front wall portion of the wheel house outer panel.

The flange, the front wall portion of the wheel house outer panel, and the piece of the joining member are integrated with the flange of the side sill strength and the piece of the joining member sandwiching the front wall portion of the wheel house outer panel. The rear vehicle body structure according to claim 2, wherein the rear vehicle body structure is welded.

The side sill is configured by joining the upper and lower ends of the side body outer panel and the side sill inner panel having a hat-shaped cross section that opens outward in the vehicle width direction,
Between the rear end portion of the side sill inner panel and the front wall portion of the wheel house inner panel, a compartment front panel having a hat-shaped cross section that opens outward in the vehicle width direction is interposed, and the front end portion of the compartment front panel is Joined to the rear end portion of the side sill inner panel, and the rising wall formed at the rear end portion of the upper wall portion of the compartment front panel is joined to the lower end portion of the front wall portion of the wheel house inner panel. The rear vehicle body structure according to any one of claims 1 to 3.

The rear end portion of the side wall portion of the compartment front panel, joining the side wall portion provided in the vehicle width direction inner side of the compartment rear panel by overlapping the vehicle width direction outer side,
The rear vehicle body structure according to claim 4, wherein a lower wall portion provided on the compartment rear panel is overlapped and joined to a rear end portion of the lower wall portion of the compartment front panel.

A lower wall portion extending toward the vehicle rear side is provided at a lower end portion of one piece of the joining member, and an extended lower wall portion provided so as to extend inward in the vehicle width direction from the lower wall portion is provided as a lower wall portion of the compartment rear panel. 6. The rear vehicle body structure according to claim 5, wherein the rear vehicle body structure is overlapped and joined from above.

A rear floor side member extending in the vehicle longitudinal direction is provided on the lower surface of the rear floor,
The rear vehicle body structure according to any one of claims 4 to 6, wherein a side wall portion of the compartment front panel is joined to the rear floor side member.