JP2011183892A - Vehicle body side part structure of vehicle - Google Patents

Vehicle body side part structure of vehicle Download PDF

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JP2011183892A
JP2011183892A JP2010049611A JP2010049611A JP2011183892A JP 2011183892 A JP2011183892 A JP 2011183892A JP 2010049611 A JP2010049611 A JP 2010049611A JP 2010049611 A JP2010049611 A JP 2010049611A JP 2011183892 A JP2011183892 A JP 2011183892A
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vehicle body
side sill
bag
vehicle
door
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JP5504014B2 (en
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Kazunori Hida
一紀 飛田
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body side part structure of a vehicle capable of sufficiently receiving and supporting a load by the whole vehicle body, even if the large input load acts from a vehicle body side part. <P>SOLUTION: This vehicle body side part structure is characterized in that a bag-shaped part 41 blocked up by a front wall part 28 and a rear wheel house extension 40, is formed in a rear part of a side sill 9, and is arranged along the vehicle body longitudinal direction in a vehicle body rear part, and a rear frame 55 of a closed cross-sectional structure connected to a middle cross member 48 arranged along the vehicle body width direction, is arranged in a side part of floor panels 45-47, and this rear frame 55 is connected to the cabin inside of the bag-shaped part 41 of the rear part of the side sill 9. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、自動車等の車両の車体側部構造に関する。   The present invention relates to a vehicle body side structure of a vehicle such as an automobile.

自動車等の車両の側面に車体幅方向外側から荷重が作用した場合に、ドアアウタパネルが車体幅方向内側に変形することがあるので、ドアの強度剛性を高めるためにドア内部に側方からの荷重に耐えうるドアインパクトビームを車体前後方向に沿って設けた車体側部構造が知られている（特許文献１参照）。   When a load acts on the side of a vehicle such as an automobile from the outside in the vehicle body width direction, the door outer panel may be deformed inward in the vehicle body width direction. There is known a vehicle body side structure in which a door impact beam that can withstand a vehicle is provided along the vehicle longitudinal direction (see Patent Document 1).

特許第３３８９６９４号公報Japanese Patent No. 3389694

上記従来の車体側部構造においては、ドアインパクトビームの内側にサイドシルが配置され、サイドシルの内側にセンタフロアクロスメンバが配置されているが、サイドシルは断面が車体前後方向に開放した構造であるため、側面衝突時等に大きな荷重が作用するとドアが車室内側に変形して入り込みサイドシルが大きく変形してしまうという課題がある。   In the conventional vehicle body side structure, the side sill is arranged inside the door impact beam, and the center floor cross member is arranged inside the side sill, but the side sill is a structure whose cross section is open in the vehicle longitudinal direction. When a large load is applied during a side collision or the like, there is a problem that the door is deformed into the vehicle interior and enters and the side sill is largely deformed.

そこで、この発明は、車体側部から大きな入力荷重が作用しても、この荷重を十分に受け止めて車体全体で支持することができる車両の車体側部構造を提供することを目的とする。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle body side portion structure that can sufficiently receive the load and support the entire vehicle body even when a large input load is applied from the vehicle body side portion.

上記目的を達成するために、請求項１に記載した発明は、車室の側部に車体前後方向に沿って設けられサイドシルインナ（例えば、実施形態におけるサイドシルインナ２０）とサイドシルアウタ（例えば、実施形態におけるサイドシルアウタ２１）とで閉断面構造に形成されたサイドシル（例えば、実施形態におけるサイドシル９）の後部に、前壁部（例えば、実施形態における前壁部２８）と後壁部（例えば、実施形態におけるリヤホイールハウスエクステンション４０）とで閉塞された袋状部（例えば、実施形態における袋状部４１）を形成し、車体後部に車体前後方向に沿って配置されると共に、フロアパネル（例えば、実施形態におけるフロントフロアパネル４５、リヤフロアパネル４７、フロアパネル段部４６）に車体幅方向に沿って設けられたクロスメンバ（例えば、実施形態におけるミドルクロスメンバ４８）に接続される閉断面構造のリヤフレーム（例えば、実施形態におけるリヤフレーム５５）を設け、このリヤフレームを前記サイドシル後部の袋状部の車室内側に接続したことを特徴とする。   In order to achieve the above object, the invention described in claim 1 includes a side sill inner (for example, the side sill inner 20 in the embodiment) and a side sill outer (for example, implementation) provided on the side of the vehicle compartment along the longitudinal direction of the vehicle body. The side sill (for example, the side sill 9 in the embodiment) and the rear wall (for example, the front wall 28 in the embodiment) and the rear wall (for example, in the embodiment) A bag-shaped portion (for example, the bag-shaped portion 41 in the embodiment) closed with the rear wheel house extension 40 in the embodiment is formed, and is disposed along the vehicle body front-rear direction at the rear of the vehicle body, and a floor panel (for example, In the embodiment, the front floor panel 45, the rear floor panel 47, and the floor panel step portion 46) extend along the vehicle body width direction. A rear frame (for example, the rear frame 55 in the embodiment) having a closed cross-sectional structure connected to a cross member (for example, the middle cross member 48 in the embodiment) provided in the form is provided, and the rear frame is formed in a bag shape at the rear portion of the side sill. It is characterized by being connected to the interior side of the vehicle.

請求項２に記載した発明は、前記サイドシル後部の袋状部の後部側に、リヤサイドドア（例えば、実施形態におけるリヤサイドドア３）のドア取付開口部（例えば、実施形態におけるドア取付開口部４）の下部後端に沿うように後方に向かって立ち上がる隆起部（例えば、実施形態における隆起部３４）を設け、前記隆起部を前記リヤサイドドア内に車体前後方向に沿って配置されたドアビーム（例えば、実施形態におけるドアビーム１０）の後端に対峙させたことを特徴とする。   According to a second aspect of the present invention, a door mounting opening (for example, the door mounting opening 4 in the embodiment) of the rear side door (for example, the rear side door 3 in the embodiment) is provided on the rear side of the bag-shaped portion at the rear of the side sill. A raised portion (e.g., raised portion 34 in the embodiment) that rises rearward along the lower rear end of the door is provided, and the raised portion is disposed in the rear side door along the longitudinal direction of the vehicle body (e.g., It is characterized by facing the rear end of the door beam 10) in the embodiment.

請求項３に記載した発明は、前記隆起部の上部に上下方向に指向する水平な上壁部（例えば、実施形態における水平部３１）を設け、この上壁部をドアビームの後端部の高さ位置に車体幅方向で対峙させたことを特徴とする。   According to a third aspect of the present invention, a horizontal upper wall portion (for example, the horizontal portion 31 in the embodiment) oriented in the vertical direction is provided at an upper portion of the raised portion, and the upper wall portion is formed at a height of the rear end portion of the door beam. It is characterized by being opposed to the vertical position in the vehicle body width direction.

請求項４に記載した発明は、前記リヤフレームの前端部を前記クロスメンバとの結合部から前方へ向けて車体幅方向外側へ傾斜させ、前記袋状部の前端の前記サイドシルインナの側壁（例えば、実施形態における側壁４９）に接合することを特徴とする。   According to a fourth aspect of the present invention, the front end portion of the rear frame is inclined forward from the connecting portion with the cross member toward the outside in the vehicle width direction, and the side wall of the side sill inner at the front end of the bag-like portion (for example, In the embodiment, it is characterized by being bonded to the side wall 49).

請求項５に記載した発明は、前記リヤフレームを、前記サイドシルの袋状部の前記隆起部の上壁部の配置位置で前記上壁部と同じ高さまで隆起させ、ここに水平なリヤフレーム上壁部（例えば、実施形態におけるリヤフレーム水平部６１）を設けたことを特徴とする。   According to a fifth aspect of the invention, the rear frame is raised to the same height as the upper wall portion at the position of the upper wall portion of the raised portion of the bag-like portion of the side sill, A wall portion (for example, the rear frame horizontal portion 61 in the embodiment) is provided.

請求項６に記載した発明は、前記サイドシルのサイドシルアウタをサイドシルアウタ前部（例えば、実施形態におけるサイドシルアウタ前部２５）とサイドシルアウタ後部（例えば、実施形態におけるサイドシルアウタ後部２６）とでと分割構成し、前記袋状部は、前記サイドシルアウタ後部の前端を車室内側に折り曲げた前記前壁部と、前記サイドシルの後端開口部（例えば、実施形態における後端開口部３２）を閉塞するホイールアーチ部（例えば、実施形態におけるリヤホイールアーチ部８）の前部を後壁部（例えば、実施形態におけるリヤホイールハウスエクステンション４０）として構成し、前記サイドシルインナとの間に前記袋状部が形成されることを特徴とする。   In the invention described in claim 6, the side sill outer of the side sill is divided into a front part of the side sill outer (for example, the side sill outer front part 25 in the embodiment) and a rear part of the side sill outer (for example, the side sill outer rear part 26 in the embodiment). The bag-like portion closes the front wall portion obtained by bending the front end of the rear portion of the side sill outer to the vehicle interior side, and the rear end opening portion of the side sill (for example, the rear end opening portion 32 in the embodiment). A front part of a wheel arch part (for example, the rear wheel arch part 8 in the embodiment) is configured as a rear wall part (for example, the rear wheel house extension 40 in the embodiment), and the bag-like part is provided between the side sill inner. It is formed.

請求項７に記載した発明は、前記サイドシルのサイドシルアウタをサイドシルアウタ前部とサイドシルアウタ後部とで分割構成し、前記袋状部は、前記サイドシルアウタ後部の前端を車室内側に折り曲げた前壁部と、前記サイドシルアウタ後部の後端を車室内側に折り曲げた後壁部として構成し、前記サイドシルインナとの間に袋状部が形成されることを特徴とする。
請求項８に記載した発明は、前記袋状部は、内部に前記サイドシルアウタが前記サイドシルインナ側に潰れるのを阻止する補強部材（例えば、実施形態における補強部材６３）を備えていることを特徴とする。 According to a seventh aspect of the present invention, the side sill outer of the side sill is divided into a front part of the side sill outer and a rear part of the side sill outer, and the bag-like part is a front wall in which the front end of the rear part of the side sill outer is bent toward the vehicle interior side. And a rear wall portion in which a rear end of the rear portion of the side sill outer is bent toward the vehicle interior side, and a bag-like portion is formed between the side sill inner.
The invention described in claim 8 is characterized in that the bag-like portion includes a reinforcing member (for example, a reinforcing member 63 in the embodiment) for preventing the side sill outer from being crushed to the side sill inner side. And

請求項１に記載した発明によれば、車両の側面に車体幅方向外側から荷重が作用した場合に、リヤサイドドアが車体幅方向内側に移動しようとしても、サイドシル後部の袋状部が前壁部と後壁部とでバルクヘッドとして機能してサイドシルが変形しないでこれを受け止めてリヤサイドドアのそれ以上の侵入を防止し、サイドシルから入力された荷重を閉断面構造のリヤフレームに伝達しクロスメンバを介して十分に受け止めて車体全体で支持することができる。また、フロアパネル剛性が高まるため音振性能を向上することができる。また、袋状部のとりわけ前壁部がバルクヘッドとして機能するため、従来サイドシル内に設けていた別体のバルクヘッドが不要となる。
請求項２に記載した発明によれば、車両の側面に車体幅方向外側から荷重が作用した場合に、リヤサイドドアが車室内側に移動しようとしても、リヤサイドドアの内部に設けたドアビームがサイドシルの袋状部の後部の隆起部を押圧して、該隆起部の上壁傾斜面、後壁部で強化された水平部からリヤフレーム水平部への荷重伝達を容易に行い、その結果としてクロスメンバに荷重を伝達することができるので、車体全体で荷重を受けて車体の変形を抑えることができる。
請求項３に記載した発明によれば、車両の側面に車体幅方向外側から荷重が作用した場合に、リヤサイドドアが車室内側に移動してドアビームから作用する入力荷重をサイドシルの後部の上壁部で強度的に有利な上壁部に沿う方向で受けることができる。
請求項４に記載した発明によれば、車両の側面に車体幅方向外側から荷重が作用した場合に、リヤサイドドアが車体幅方向内側に移動しようとしても、サイドシル後部の袋状部が前壁部と後壁部とでバルクヘッドとして機能してサイドシルが変形しないでこれを受け止めてリヤサイドドアのそれ以上の侵入を防止し、サイドシルから入力された荷重を閉断面構造が連続するリヤフレームにスムーズに連続的に伝達しクロスメンバを介して十分に受け止めて車体全体で支持することができる。
請求項５に記載した発明によれば、車両の側面に車体幅方向外側から荷重が作用した場合に、リヤサイドドアが車室内側に移動してドアビームから作用する入力荷重をサイドシル後部の上壁部と、この上壁部と同じ高さに設けたリヤフレームのリヤフレーム上壁部とで強度的に有利な上壁部に沿う方向で受けることができる。
請求項６に記載した発明によれば、サイドシル後部の袋状部を形成する後壁部として、既存の部材であるホイールアーチ部の前部を利用しているため、別部材が必要なく、部品点数を増やすことなく対策できる。
請求項７に記載した発明によれば、サイドシル後部の袋状部を形成する前壁部も後壁部もサイドシルアウタ自体で形成するため、成形が容易となる。
請求項８に記載した発明によれば、サイドシルの袋状部の断面崩壊を阻止することができる。 According to the first aspect of the present invention, when a load is applied to the side surface of the vehicle from the outer side in the vehicle body width direction, the bag-like portion at the rear side of the side sill is moved to the front wall portion even if the rear side door attempts to move inward in the vehicle body width direction. The rear sill functions as a bulkhead to prevent the side sill from deforming, preventing further intrusion of the rear side door, and transmitting the load input from the side sill to the rear frame of the closed cross-section structure. It can be sufficiently received through and supported by the entire vehicle body. Moreover, since the floor panel rigidity is increased, the sound vibration performance can be improved. In addition, since the front wall portion of the bag-like portion functions as a bulkhead, a separate bulkhead conventionally provided in the side sill becomes unnecessary.
According to the invention described in claim 2, when a load is applied to the side surface of the vehicle from the outside in the vehicle body width direction, the door beam provided inside the rear side door is not By pressing the raised part at the rear of the bag-like part, load transmission from the horizontal part reinforced at the upper wall inclined surface of the raised part and the rear wall part to the horizontal part of the rear frame is easily performed, and as a result, the cross member Since the load can be transmitted to the vehicle body, the deformation of the vehicle body can be suppressed by receiving the load in the entire vehicle body.
According to the third aspect of the present invention, when a load acts on the side surface of the vehicle from the outside in the vehicle body width direction, the rear side door moves to the vehicle interior side, and the input load acting from the door beam is applied to the upper wall of the rear portion of the side sill. It can be received in a direction along the upper wall portion which is advantageous in terms of strength.
According to the invention described in claim 4, when a load is applied to the side surface of the vehicle from the outside in the vehicle body width direction, the bag-like portion at the rear side of the side sill is the front wall portion even if the rear side door attempts to move inward in the vehicle body width direction. The rear sill functions as a bulkhead and receives the side sill without deformation, preventing further intrusion of the rear side door, and smoothly loading the load input from the side sill into the rear frame with a closed cross-section structure. It can be continuously transmitted, received sufficiently through the cross member, and supported by the entire vehicle body.
According to the fifth aspect of the present invention, when a load is applied to the side surface of the vehicle from the outside in the vehicle body width direction, the rear side door moves to the vehicle interior side and the input load applied from the door beam is applied to the upper wall portion of the rear side sill. The rear frame upper wall portion of the rear frame provided at the same height as the upper wall portion can be received in a direction along the upper wall portion which is advantageous in terms of strength.
According to the invention described in claim 6, since the front part of the wheel arch part, which is an existing member, is used as the rear wall part that forms the bag-like part of the side sill rear part, no separate member is required, and the part Measures can be taken without increasing the score.
According to the invention described in claim 7, since the front wall part and the rear wall part forming the bag-like part of the rear side sill are formed by the side sill outer itself, the molding becomes easy.
According to the invention described in claim 8, the cross-sectional collapse of the bag-like portion of the side sill can be prevented.

この発明の実施形態の車体の部分斜視図である。1 is a partial perspective view of a vehicle body according to an embodiment of the present invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 図２のＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line of FIG. サイドシルアウタ後部の斜視図である。It is a perspective view of a rear part of a side sill outer. 図２のＢ−Ｂ線に沿う断面図である。It is sectional drawing which follows the BB line of FIG. 図２のＣ−Ｃ線に沿う断面図である。It is sectional drawing which follows the CC line of FIG. 図２のＤ−Ｄ線に沿う断面図である。It is sectional drawing which follows the DD line | wire of FIG. 図２のＥ−Ｅ線に沿う断面図である。It is sectional drawing which follows the EE line | wire of FIG. サイドシルアウタ後部を取り外した状態の図２に相当する斜視図である。FIG. 3 is a perspective view corresponding to FIG. 2 with a rear side sill outer rear part removed. 後部側から見た斜視図である。It is the perspective view seen from the rear part side.

次に、この発明の実施形態を図面に基づいて説明する。図１に示すように、車体１の両側部には図示しないフロントサイドドアのドア取付開口部２とリヤサイドドア３のドア取付開口部４が形成されている。
リヤサイドドア３が取り付けられるドア取付開口部４は、センターピラー５、ルーフサイドレール６、リヤピラー７、リヤホイールアーチ部８及びサイドシル９によって形成されている。リヤサイドドア３の内部には下部に車体前後方向に沿ってパイプ状のドアビーム１０が内装されている。尚、この実施形態ではドアビーム１０はパイプ状であるが、断面波板状に折り曲げたプレス品でもよい。 Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a door mounting opening 2 for a front side door and a door mounting opening 4 for a rear side door 3 (not shown) are formed on both sides of the vehicle body 1.
The door attachment opening 4 to which the rear side door 3 is attached is formed by a center pillar 5, a roof side rail 6, a rear pillar 7, a rear wheel arch portion 8 and a side sill 9. Inside the rear side door 3, a pipe-shaped door beam 10 is provided at the lower portion along the longitudinal direction of the vehicle body. In this embodiment, the door beam 10 has a pipe shape, but may be a press product bent into a corrugated plate shape.

図２、図３に示すように、サイドシル９は車室の両側部に車体前後方向に沿って設けられ共にサイドシルインナ２０とサイドシルアウタ２１とを上部接合フランジ２２と下部接合フランジ２３とで接合して閉断面構造に形成された車体骨格部材である。
サイドシルアウタ２１はサイドシルアウタ前部２５とサイドシルアウタ後部２６とで分割構成されている。サイドシルインナ２０もサイドシルアウタ２１に対応してサイドシルインナ前部２０Ｆとサイドシルインナ後部２０Ｒとで分割構成されているが、説明の上で必要である場合（図５、図６）以外はサイドシルインナ２０として説明する。 As shown in FIGS. 2 and 3, the side sill 9 is provided on both sides of the passenger compartment along the longitudinal direction of the vehicle body, and the side sill inner 20 and the side sill outer 21 are joined together by the upper joint flange 22 and the lower joint flange 23. This is a vehicle body skeleton member formed in a closed cross-sectional structure.
The side sill outer 21 is divided into a side sill outer front portion 25 and a side sill outer rear portion 26. The side sill inner 20 is also divided into a side sill inner front portion 20F and a side sill inner rear portion 20R corresponding to the side sill outer 21, but the side sill inner 20 except for the case where it is necessary for explanation (FIGS. 5 and 6). Will be described.

図４〜図７に示すように、サイドシルアウタ後部２６は車室外側に指向する外壁部２７の前端部に車室内側に折れ曲がる前壁部２８を備え、外壁部２７の下縁に車室内側に折れ曲がる下壁部２９を備え、外壁部２７の後端部には後方に開口した後端開口部３２を備え、外壁部２７の上縁には車室内側に折れ曲がる上壁部３０を備えている。前壁部２８、下壁部２９、上壁部３０は連続している。
サイドシルアウタ後部２６の後部は上壁部３０の後部が上壁傾斜面３５を経て前部に対して立ち上がるように隆起する隆起部３４を備え、隆起部３４の上部に車体上下方向に指向する水平部３１が形成されている。
これら前壁部２８、上壁部３０、下壁部２９、後端開口部３２の周縁には周縁フランジ３３が形成されている。ここで、サイドシルアウタ前部２５についても上壁部３０、外壁部２７、下壁部２９がサイドシルアウタ後部２６と共通するので同一部分に同一符号を付す。 As shown in FIGS. 4 to 7, the side sill outer rear portion 26 includes a front wall portion 28 that is bent toward the vehicle interior side at the front end portion of the outer wall portion 27 that faces the vehicle exterior side, and a vehicle interior side at the lower edge of the outer wall portion 27. A lower wall portion 29 that bends inward, a rear end opening portion 32 that opens rearward at the rear end portion of the outer wall portion 27, and an upper wall portion 30 that is bent toward the vehicle interior side at the upper edge of the outer wall portion 27. Yes. The front wall portion 28, the lower wall portion 29, and the upper wall portion 30 are continuous.
The rear portion of the side sill outer rear portion 26 is provided with a bulging portion 34 that protrudes so that the rear portion of the upper wall portion 30 rises with respect to the front portion via the upper wall inclined surface 35, and a horizontal portion directed in the vertical direction of the vehicle body at the upper portion of the bulging portion 34. A portion 31 is formed.
A peripheral flange 33 is formed on the periphery of the front wall portion 28, the upper wall portion 30, the lower wall portion 29, and the rear end opening portion 32. Here, since the upper wall portion 30, the outer wall portion 27, and the lower wall portion 29 of the side sill outer front portion 25 are common to the side sill outer rear portion 26, the same portions are denoted by the same reference numerals.

サイドシルアウタ後部２６は、サイドシルインナ２０に接続された状態で、開放された後端開口部３２の周縁フランジ３３にリヤホイールアーチ部８のリヤホイールハウスエクステンション４０（後壁部として構成される）が接合され、後端開口部３２が閉塞されている。前壁部２８の周縁フランジ３３は図６に示すようにサイドシルインナ前部２０Ｆに接合されるため、サイドシル９の後部では閉断面構造部の前後が、サイドシルアウタ後部２６の前壁部２８とリヤホイールハウスエクステンション４０とで閉塞されてサイドシルインナ２０との間に袋状部４１が形成されている。   In the state where the side sill outer rear portion 26 is connected to the side sill inner 20, a rear wheel house extension 40 (configured as a rear wall portion) of the rear wheel arch portion 8 is formed on the peripheral flange 33 of the opened rear end opening portion 32. The rear end opening 32 is closed by being joined. Since the peripheral flange 33 of the front wall portion 28 is joined to the side sill inner front portion 20F as shown in FIG. 6, the front and rear of the closed cross-section structure portion at the rear portion of the side sill 9 are the A bag-like portion 41 is formed between the side sill inner 20 and the wheel house extension 40.

図７に示すように、サイドシル９の前部側（ドア取付開口部４の下辺部分の前部側）では、フロントフロアパネル４５の側縁部はサイドシル９のサイドシルインナ２０の側壁４９の下部に接合されている。
図８に示すように、フロントフロアパネル４５の後縁には階段状のフロアパネル段部４６の前縁が接続され、フロアパネル段部４６の後縁にはリヤフロアパネル４７が接続されている。フロアパネル段部４６には裏側からミドルクロスメンバ４８が接合され、フロアパネル段部４６の裏側に車体幅方向に沿って閉断面構造部Ｈ１が形成されている。 As shown in FIG. 7, on the front side of the side sill 9 (the front side of the lower side portion of the door mounting opening 4), the side edge of the front floor panel 45 is located below the side wall 49 of the side sill inner 20 of the side sill 9. It is joined.
As shown in FIG. 8, the front edge of the stepped floor panel step 46 is connected to the rear edge of the front floor panel 45, and the rear floor panel 47 is connected to the rear edge of the floor panel step 46. A middle cross member 48 is joined to the floor panel step 46 from the back side, and a closed cross-section structure portion H1 is formed on the back side of the floor panel step 46 along the vehicle body width direction.

図２、図３に示すように、リヤフロアパネル４７の両側縁にリヤフレーム５５が取り付けられている。リヤフレーム５５はサイドシル９よりも車体幅方向内側で車体後部に向かって延びる車体骨格部材であって、サイドシル９の後部ではリヤフロアパネル４７に接合されると共にミドルクロスメンバ４８の両端部に接合されている。リヤフレーム５５の前端部はミドルクロスメンバ４８との結合部から前方へ向けて車体幅方向外側へ傾斜して、サイドシル９の側壁４９に接合されている。   As shown in FIGS. 2 and 3, rear frames 55 are attached to both side edges of the rear floor panel 47. The rear frame 55 is a vehicle body skeleton member that extends toward the rear of the vehicle body on the inner side in the vehicle width direction than the side sill 9. The rear frame 55 is joined to the rear floor panel 47 and joined to both ends of the middle cross member 48 at the rear of the side sill 9. Yes. The front end portion of the rear frame 55 is inclined outward in the vehicle body width direction from the connecting portion with the middle cross member 48 and joined to the side wall 49 of the side sill 9.

具体的には、図３に示すように、サイドシル９の後部では、リヤフロアパネル４７の側縁は、リヤフレームアッパ５６の側縁フランジ５７とリヤフレームロア５８の側縁フランジ５９に挟み込まれるようにしてリヤフレーム５５が閉断面構造部Ｈ２を形成して接合されている。サイドシル９の前部（ドア取付開口部４の下辺部分の前部側）では、図２に示すように、フロアパネル段部４６の側壁６０及び図示しないミドルクロスメンバ４８の端部との結合部から前側に徐々に斜側壁６２をサイドシルインナ２０に近づくようにして斜めに形成され、リヤフレーム５５はリヤフレームアッパ５６のフランジ部５０がサイドシル９の上部接合フランジ２２に接合され（図５参照）、リヤフレームロア５８のフランジ部５１がサイドシル９のサイドシルインナ２０Ｒに接合されている（図２参照）。   Specifically, as shown in FIG. 3, at the rear portion of the side sill 9, the side edge of the rear floor panel 47 is sandwiched between the side edge flange 57 of the rear frame upper 56 and the side edge flange 59 of the rear frame lower 58. The rear frame 55 is joined by forming a closed cross-section structure portion H2. At the front portion of the side sill 9 (the front side of the lower side portion of the door mounting opening 4), as shown in FIG. 2, the connecting portion between the side wall 60 of the floor panel step 46 and the end of the middle cross member 48 (not shown). The rear frame 55 is formed obliquely from the front side to the front side so that the inclined side wall 62 approaches the side sill inner 20, and the flange portion 50 of the rear frame upper 56 is joined to the upper joint flange 22 of the side sill 9 (see FIG. 5). The flange portion 51 of the rear frame lower 58 is joined to the side sill inner 20R of the side sill 9 (see FIG. 2).

ここで、リヤフレーム５５はサイドシル９の袋状部４１の隆起部３４の水平部３１の配置位置とほぼ同じ高さまで隆起し、ここに車体上下方向に指向する水平なリヤフレーム水平部６１を備えていて、袋状部４１に車体内側から接続されている。
また、リヤフレーム水平部６１の高さ寸法は、厳密にはサイドシルアウタ後部２６の上部に位置する周縁フランジ３３の上下方向中央部付近の高さ寸法に設定され、サイドシル９の上部接合フランジ部２２の周縁フランジ３３からの車体幅方向内側向きの荷重を確実にリヤフレーム水平部６１の面に沿う方向で受けることができる。 Here, the rear frame 55 is raised to substantially the same height as the position of the horizontal portion 31 of the raised portion 34 of the bag-like portion 41 of the side sill 9, and is provided with a horizontal rear frame horizontal portion 61 oriented in the vertical direction of the vehicle body. And connected to the bag-like portion 41 from the inside of the vehicle body.
Further, the height dimension of the rear frame horizontal portion 61 is strictly set to a height dimension in the vicinity of the central portion in the vertical direction of the peripheral flange 33 located at the upper portion of the side sill outer rear portion 26, and the upper joint flange portion 22 of the side sill 9. It is possible to reliably receive the inward load in the vehicle body width direction from the peripheral flange 33 in the direction along the surface of the rear frame horizontal portion 61.

そして、サイドシル９の袋状部４１の隆起部３４は、リヤサイドドア３の内部に車体前後方向に配置されたドアビーム１０の後端部に車体幅方向で対峙しており、厳密には図３に示すように、隆起部３４の水平部３１の高さ位置がドアビーム１０の後端部の高さ位置（ドアビーム１０後端の上下方向幅の間）に車体幅方向で対峙している。   The raised portion 34 of the bag-like portion 41 of the side sill 9 is opposed to the rear end portion of the door beam 10 disposed in the longitudinal direction of the vehicle body in the rear side door 3 in the vehicle body width direction. As shown, the height position of the horizontal portion 31 of the raised portion 34 is opposed to the height position of the rear end portion of the door beam 10 (between the vertical widths of the rear end of the door beam 10) in the vehicle body width direction.

図９，図１０に示すように、サイドシルインナ後部２０Ｒには、袋状部４１の内部に側壁４９の車体幅方向の壁面に対向するように、サイドシルアウタ後部２６がサイドシルインナ後部２０Ｒ側へ潰れるのを阻止する補強部材６３が収容されている。この補強部材６３は上端部がサイドシルインナ後部２０Ｒの側壁４９に接合され、下端部はサイドシルアウタ後部２６とサイドシルインナ後部２０Ｒとの下部接合フランジ２３に挟み込まれて固定されている。上下方向に延び車体幅方向外側に指向する受け面６４の前後両側縁に車室内側に折れ曲がる縦壁６５，６５を備え、前側の縦壁６５はサイドシルインナ後部２０Ｒの側壁４９にフランジ部６６を接合している。受け面６４には軽量化及び潰れ度合いを調整するための孔６７，６８が形成されている。   As shown in FIGS. 9 and 10, in the side sill inner rear portion 20 </ b> R, the side sill outer rear portion 26 is crushed toward the side sill inner rear portion 20 </ b> R so as to face the wall surface of the side wall 49 in the vehicle body width direction inside the bag-shaped portion 41. A reinforcing member 63 that prevents this is accommodated. The reinforcing member 63 has an upper end joined to the side wall 49 of the side sill inner rear portion 20R, and a lower end sandwiched between the lower joining flanges 23 of the side sill outer rear portion 26 and the side sill inner rear portion 20R. Longitudinal walls 65, 65 are provided at both front and rear edges of the receiving surface 64 extending in the vertical direction and directed outward in the vehicle body width direction. The front vertical wall 65 has a flange 66 on the side wall 49 of the side sill inner rear portion 20R. It is joined. The receiving surface 64 is formed with holes 67 and 68 for adjusting the degree of weight reduction and crushing.

上記実施形態によれば、車両側面衝突時等に、車体幅方向外側から荷重が作用した場合に、リヤサイドドア３が車体幅方向内側に移動しようとしても、サイドシル９の後部の袋状部４１が前壁部２８とリヤホイールハウスエクステンション４０とでバルクヘッドとして機能し、サイドシル９が変形しないでこれを受け止めてリヤサイドドア３のそれ以上の侵入を防止し、サイドシル９から入力された荷重をリヤフレーム５５の閉断面構造部Ｈ２に伝達しミドルクロスメンバ４８とフロアパネル段部４６とによって形成された閉断面構造部Ｈ１を介して十分に受け止めて車体１の全体で支持することができる。また、フロントフロアパネル４５、リヤフロアパネル４７、フロアパネル段部４６からなるフロアパネル剛性が高まるため音振性能を向上することができる。   According to the above embodiment, when a load is applied from the outside in the vehicle body width direction at the time of a vehicle side collision or the like, even if the rear side door 3 attempts to move inward in the vehicle body width direction, The front wall portion 28 and the rear wheel house extension 40 function as a bulkhead, and the side sill 9 is received without being deformed to prevent further intrusion of the rear side door 3, and the load input from the side sill 9 is applied to the rear frame. It can be received and sufficiently supported by the entire vehicle body 1 through the closed cross-section structure portion H1 formed by the middle cross member 48 and the floor panel step portion 46. Moreover, since the floor panel rigidity which consists of the front floor panel 45, the rear floor panel 47, and the floor panel step part 46 increases, sound vibration performance can be improved.

とりわけ、リヤサイドドア３が車室内側に移動しようとした場合に、リヤサイドドア３の内部に設けたドアビーム１０は、図３に矢印で示すようにサイドシル９の後部の袋状部４１の後部に設けた隆起部３４を押圧し、隆起部３４の上壁傾斜面３５、リヤホイールハウスエクステンション４０で強化された水平部３１からリヤフレーム水平部６１への荷重伝達を容易に行い、リヤフレーム５５の閉断面構造部Ｈ２、ミドルクロスメンバ４８とフロアパネル段部４６とによって形成された閉断面構造部Ｈ１を経てフロントフロアパネル４５、リヤフロアパネル４７に伝達されるため、潰れ変形することなく車体１の全体で荷重を受け、車体１の変形を抑えることができる。   In particular, when the rear side door 3 is about to move to the vehicle interior side, the door beam 10 provided inside the rear side door 3 is provided at the rear part of the bag-like part 41 at the rear part of the side sill 9 as shown by an arrow in FIG. The raised portion 34 is pressed, load transmission from the horizontal portion 31 reinforced by the upper wall inclined surface 35 of the raised portion 34 and the rear wheel house extension 40 to the rear frame horizontal portion 61 is easily performed, and the rear frame 55 is closed. The vehicle body 1 is transmitted to the front floor panel 45 and the rear floor panel 47 via the closed cross-section structure portion H1 formed by the cross-section structure portion H2, the middle cross member 48 and the floor panel step portion 46. The deformation of the vehicle body 1 can be suppressed by receiving a load.

ここで、ドアビーム１０から作用する入力荷重はサイドシル９の後部の袋状部４１の後部の上壁部３０の水平部３１で強度的に有利な水平部３１に沿う方向で受けることができるので、水平部３１に対して上下方向にずれていた場合に比較して、水平部３１が強度的に不利な曲げを受けることがなくなり、確実にドアビーム１０から受けた荷重を支持することができる。   Here, the input load acting from the door beam 10 can be received in the direction along the horizontal portion 31 which is advantageous in strength at the horizontal portion 31 of the upper wall portion 30 of the rear portion of the bag-like portion 41 of the rear portion of the side sill 9. Compared to the case where the horizontal portion 31 is displaced in the vertical direction, the horizontal portion 31 is not subjected to bending that is disadvantageous in terms of strength, and the load received from the door beam 10 can be reliably supported.

また、サイドシル９の後部においてはサイドシルアウタ後部２６が前壁部２８と後端開口部３２を覆うリヤホイールハウスエクステンション４０とが形成されて袋状部４１をなっているため、この袋状部４１がバルクヘッドとして機能してサイドシル９の変形を阻止し、これを受け止めてリヤサイドドア３のそれ以上の侵入を防止し、サイドシル９から入力された荷重を連続的に閉断面構造部Ｈ２，Ｈ１が連続するリヤフレーム５５とミドルクロスメンバ４８にスムーズに伝達し十分に受け止めて支持することができる。また、袋状部４１のとりわけ前壁部２８がバルクヘッドとして機能するため、従来サイドシル９内に設けていた別体のバルクヘッドが不要となる。   Further, in the rear part of the side sill 9, the side sill outer rear part 26 is formed with a front wheel part 28 and a rear wheel house extension 40 that covers the rear end opening part 32 to form a bag-like part 41. Functions as a bulkhead to prevent the deformation of the side sill 9 and to prevent the rear side door 3 from entering further, and the load input from the side sill 9 is continuously applied to the closed cross-section structures H2 and H1. It can be smoothly transmitted to the continuous rear frame 55 and the middle cross member 48 and sufficiently received and supported. Further, since the front wall portion 28 of the bag-like portion 41 functions as a bulkhead, a separate bulkhead that is conventionally provided in the side sill 9 becomes unnecessary.

この場合、リヤフレーム５５には袋状部４１の後部の上壁部３０の水平部３１と前後位置及び高さ位置で一致するリヤフレーム水平部６１がサイドシルアウタ後部２６の周縁フランジ３３の上下方向中央部付近の高さ寸法に設定されているため、リヤフレーム５５に対して強度的に有利なリヤフレーム水平部６１に沿う方向で受けることができる。   In this case, the rear frame 55 has a rear frame horizontal portion 61 that coincides with the horizontal portion 31 of the upper wall portion 30 of the rear portion of the bag-like portion 41 at the front and rear positions and the height position, and the vertical direction of the peripheral flange 33 of the side sill outer rear portion 26. Since the height is set in the vicinity of the central portion, it can be received in a direction along the rear frame horizontal portion 61 that is advantageous in strength with respect to the rear frame 55.

サイドシル９の後部の袋状部４１を形成する後壁部として、既存の部材であるリヤホイールアーチ部８の前部を構成するリヤホイールハウスエクステンション４０を利用しているため、別部材が必要なく、部品点数を増やすことなく対策できる。
そして、補強部材６３が袋状部４１内に設けられ、受け面６４が車体幅方向外側に指向しているため、サイドシルアウタ後部２６が潰れようとしても、補強部材６３が受け面６４でサイドシルアウタ後部２６の外壁部２７の侵入を抑えるため、袋状部４１の潰れを確実に抑え、袋状部４１の断面崩壊を防止することができる。 Since the rear wheel house extension 40 that constitutes the front part of the rear wheel arch part 8 that is an existing member is used as the rear wall part that forms the bag-like part 41 at the rear part of the side sill 9, no separate member is required. Measures can be taken without increasing the number of parts.
Further, since the reinforcing member 63 is provided in the bag-like portion 41 and the receiving surface 64 is directed outward in the vehicle body width direction, the reinforcing member 63 is supported by the receiving surface 64 on the side sill outer even when the side sill outer rear portion 26 is crushed. Since the penetration of the outer wall portion 27 of the rear portion 26 is suppressed, the collapse of the bag-like portion 41 can be reliably suppressed, and the cross-section collapse of the bag-like portion 41 can be prevented.

尚、この発明は上記実施形態に限られるものではなく、例えば、サイドシル９の後部の袋状部４１を形成する後壁部として、リヤホイールアーチ部８の前部を構成するリヤホイールハウスエクステンション４０を用いたが、袋状部４１の前壁部２８と同様に、サイドシルアウタ後部２６の外壁部２７の後端部を車室内側に折り曲げることで後壁部（図示しない）を形成することもできる。
また、補強部材６３は袋状部４１の内部に収容されるものであれば、サイドシルアウタ後部２６の外壁部２７の内面にフランジ部６６を接合する構成であってもよい。 The present invention is not limited to the above-described embodiment. For example, the rear wheel house extension 40 constituting the front portion of the rear wheel arch portion 8 is used as a rear wall portion that forms the bag-like portion 41 at the rear portion of the side sill 9. However, as with the front wall portion 28 of the bag-like portion 41, a rear wall portion (not shown) may be formed by bending the rear end portion of the outer wall portion 27 of the side sill outer rear portion 26 toward the vehicle interior side. it can.
Further, as long as the reinforcing member 63 is accommodated in the bag-like portion 41, the flange portion 66 may be joined to the inner surface of the outer wall portion 27 of the side sill outer rear portion 26.

３ リヤサイドドア
４ ドア取付開口部
８ リヤホイールアーチ部（ホイールアーチ部）
９ サイドシル
１０ ドアビーム
２０ サイドシルインナ
２１ サイドシルアウタ
２５ サイドシルアウタ前部
２６ サイドシルアウタ後部
２８ 前壁部
３１ 水平部（上壁部）
３２ 後端開口部
３４ 隆起部
４０ リヤホイールハウスエクステンション（後壁部）
４１ 袋状部
４５ フロントフロアパネル（フロアパネル）
４６ フロアパネル段部（フロアパネル）
４７ リヤフロアパネル（フロアパネル）
４８ ミドルクロスメンバ（クロスメンバ）
４９ 側壁
５５ リヤフレーム
６１ リヤフレーム水平部（リヤフレーム上壁部）
６３ 補強部材 3 Rear side door 4 Door mounting opening 8 Rear wheel arch (wheel arch)
9 Side sill 10 Door beam 20 Side sill inner 21 Side sill outer 25 Side sill outer front part 26 Side sill outer rear part 28 Front wall part 31 Horizontal part (upper wall part)
32 Rear end opening 34 Raised portion 40 Rear wheel house extension (rear wall)
41 Bag 45 45 Front floor panel (floor panel)
46 Floor panel step (floor panel)
47 Rear floor panel (floor panel)
48 Middle cross member (cross member)
49 Side wall 55 Rear frame 61 Rear frame horizontal part (rear frame upper wall part)
63 Reinforcing member

Claims (8)

車室の側部に車体前後方向に沿って設けられサイドシルインナとサイドシルアウタとで閉断面構造に形成されたサイドシルの後部に、前壁部と後壁部とで閉塞された袋状部を形成し、車体後部に車体前後方向に沿って配置されると共に、車体幅方向に沿ってフロアパネルに設けられたクロスメンバに接続される閉断面構造のリヤフレームを設け、このリヤフレームを前記サイドシル後部の袋状部の車室内側に接続したことを特徴とする車両の車体側部構造。   A bag-like part closed by the front wall part and the rear wall part is formed at the rear part of the side sill that is provided along the vehicle body longitudinal direction on the side part of the passenger compartment and formed with a side sill inner and side sill outer. A rear frame having a closed cross-sectional structure disposed along the vehicle body longitudinal direction and connected to a cross member provided in the floor panel along the vehicle body width direction. The vehicle body side part structure of the vehicle characterized by connecting to the vehicle interior side of the bag-like part. 前記サイドシル後部の袋状部の後部側に、リヤサイドドアのドア取付開口部の下部後端に沿うように後方に向かって立ち上がる隆起部を設け、前記隆起部を前記リヤサイドドア内に車体前後方向に沿って配置されたドアビームの後端に対峙させたことを特徴とする請求項１記載の車両の車体側部構造。   On the rear side of the bag-like portion at the rear of the side sill, a raised portion is provided that rises rearward along the lower rear end of the door mounting opening of the rear side door, and the raised portion is disposed in the rear side door in the longitudinal direction of the vehicle body. The vehicle body side part structure according to claim 1, wherein the vehicle body side part structure is opposed to a rear end of the door beam disposed along the vehicle body. 前記隆起部の上部に上下方向に指向する水平な上壁部を設け、この上壁部の高さ位置をドアビームの後端部の高さ位置に車体幅方向で対峙させたことを特徴とする請求項２記載の車両の車体側部構造。   A horizontal upper wall portion directed in the vertical direction is provided on the upper portion of the raised portion, and the height position of the upper wall portion is opposed to the height position of the rear end portion of the door beam in the vehicle body width direction. The vehicle body side part structure according to claim 2. 前記リヤフレームの前端部を前記クロスメンバとの結合部から前方へ向けて車体幅方向外側へ傾斜させ、前記袋状部の前端の前記サイドシルインナに接合することを特徴とする請求項１記載の車両の車体側部構造。   The front end portion of the rear frame is inclined outward in the vehicle body width direction from the coupling portion with the cross member and joined to the side sill inner at the front end of the bag-like portion. Vehicle body side structure. 前記リヤフレームを、前記サイドシルの袋状部の前記隆起部の上壁部の配置位置で前記上壁部と同じ高さまで隆起させ、ここに水平なリヤフレーム上壁部を設けたことを特徴とする請求項２記載の車両の車体側部構造。   The rear frame is raised to the same height as the upper wall portion at the position of the upper wall portion of the raised portion of the bag-like portion of the side sill, and a horizontal rear frame upper wall portion is provided here. The vehicle body side part structure according to claim 2. 前記サイドシルのサイドシルアウタをサイドシルアウタ前部とサイドシルアウタ後部とでと分割構成し、前記袋状部は、前記サイドシルアウタ後部の前端を車室内側に折り曲げた前記前壁部と、前記サイドシルの後端開口部を閉塞するホイールアーチ部の前部を後壁部として構成し、前記サイドシルインナとの間に前記袋状部が形成されることを特徴とする請求項１記載の車両の車体側部構造。   The side sill outer of the side sill is divided into a front part of the side sill outer and a rear part of the side sill outer, and the bag-like part is formed by bending the front end of the rear part of the side sill outer to the vehicle interior side and the rear of the side sill. The vehicle body side portion of the vehicle according to claim 1, wherein a front portion of a wheel arch portion that closes the end opening portion is configured as a rear wall portion, and the bag-shaped portion is formed between the side sill inner. Construction. 前記サイドシルのサイドシルアウタをサイドシルアウタ前部とサイドシルアウタ後部とで分割構成し、前記袋状部は、前記サイドシルアウタ後部の前端を車室内側に折り曲げた前壁部と、前記サイドシルアウタ後部の後端を車室内側に折り曲げた後壁部として構成し、前記サイドシルインナとの間に袋状部が形成されることを特徴とする請求項１記載の車両の車体側部構造。   The side sill outer of the side sill is divided into a front part of the side sill outer and a rear part of the side sill outer, and the bag-like part includes a front wall part obtained by bending the front end of the rear part of the side sill outer to the vehicle interior side, and a rear part of the rear side sill outer part. 2. The vehicle body side part structure according to claim 1, wherein an end part of the vehicle body side part is formed as a rear wall part, and a bag-like part is formed between the side sill inner. 前記袋状部は、内部に前記サイドシルアウタが前記サイドシルインナ側に潰れるのを阻止する補強部材を備えていることを特徴とする請求項１記載の車両の車体側部構造。   The vehicle body side part structure according to claim 1, wherein the bag-like portion includes a reinforcing member that prevents the side sill outer from being crushed toward the side sill inner.
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