JP2008120179A - Vehicle body lower structure - Google Patents

Vehicle body lower structure Download PDF

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JP2008120179A
JP2008120179A JP2006304724A JP2006304724A JP2008120179A JP 2008120179 A JP2008120179 A JP 2008120179A JP 2006304724 A JP2006304724 A JP 2006304724A JP 2006304724 A JP2006304724 A JP 2006304724A JP 2008120179 A JP2008120179 A JP 2008120179A
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vehicle
bulkhead
vehicle body
rocker
body lower
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JP4853243B2 (en
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Hiroshi Okumura
浩志 奥村
Akira Osumi
晃 大隅
Shinichi Shibazaki
真一 柴崎
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Toyota Auto Body Co Ltd
Toyota Motor Corp
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Toyota Auto Body Co Ltd
Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body lower structure preventing the collapse of the cross section of a locker even if a collision load is applied to the locker obliquely upwardly on the vehicle interior side at the time of a side face collision of a vehicle. <P>SOLUTION: In the vehicle body lower structure a bulkhead 3 partitioning the closed cross section along the longitudinal direction of the locker 1 and comprising a metal plate is installed in of the locker 1 constituting a lower edge of the side face of the vehicle body and having a closed cross section. On the plate face 30 of the bulkhead 3, a slant reinforcement bead 36 extended from the lower position at the vehicle exterior side of the plate face 30 to the upper direction on the vehicle interior side along the collision load applied to the locker 1 obliquely upwardly on the vehicle interior side at the time of side face collision of the vehicle is provided to strengthen the surface rigidity of the bulkhead 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、車体側面の下縁を構成する閉断面構造のロッカーの補強構造、特に、ロッカー内にこれを前後方向に仕切るバルクヘッドを設けて補強した車体下部構造に関する。   The present invention relates to a structure for reinforcing a rocker having a closed cross-sectional structure that constitutes a lower edge of a side surface of a vehicle body, and more particularly to a vehicle body lower structure that is reinforced by providing a bulkhead that partitions the rocker in the front-rear direction.

従来、自動車の車体側面の下縁を形成する閉断面構造のロッカーにはその内部に、閉断面を前後方向に仕切る金属板のバルクヘッドを設けて強化することが行われている（例えば、特許文献１参照。）。尚、特許文献１では、車両のオフセット衝突時に、フロントサイドメンバからロッカー（サイドシル）に作用する衝突荷重に対してロッカーを強化することが記載されている。また、ロッカー内に設置されるバルクヘッドは車両の側面衝突時にロッカーの断面崩れを防ぐ役目をなす。   Conventionally, a rocker having a closed cross-section structure that forms the lower edge of the side surface of a vehicle body is provided with a bulkhead made of a metal plate that partitions the closed cross section in the front-rear direction (for example, patents). Reference 1). In Patent Document 1, it is described that a rocker is strengthened against a collision load that acts on a rocker (side sill) from a front side member at the time of a vehicle offset collision. Also, the bulkhead installed in the locker serves to prevent the cross-section of the locker from collapsing in the event of a vehicle side collision.

図４は車両の側面衝突時にロッカーの断面崩れを防ぐバルクヘッドを備えたロッカーの概略斜視図、また図５、図６はこの種のバルクヘッドの従来の代表例を示すものである。ロッカー１は車室フロアＦの側縁に沿って設けられ、アウタパネル１０と、アウタパネル１０の内面側に沿うリィンフォースメント２、およびインナパネル１１とで閉断面をなす。ロッカー１にはその上面の前後中間位置に、中間ピラーＰが立設されている。そして、ロッカー１内部には、中間ピラーＰで区画されたフロントドア開口８側およびリヤドア開口９側にそれぞれ複数のバルクヘッド６が設けられている。尚、バルクヘッド６は車室フロアＦのフロアクロスメンバ７の車幅方向側端末に対応する位置に設けられている。   FIG. 4 is a schematic perspective view of a rocker provided with a bulkhead that prevents the rocker from collapsing in the case of a side collision of the vehicle, and FIGS. 5 and 6 show typical examples of this type of bulkhead. The locker 1 is provided along the side edge of the passenger compartment floor F, and forms a closed cross section with the outer panel 10, the reinforcement 2 along the inner surface side of the outer panel 10, and the inner panel 11. An intermediate pillar P is erected on the rocker 1 at the front and rear intermediate positions on the upper surface thereof. A plurality of bulkheads 6 are provided inside the locker 1 on the front door opening 8 side and the rear door opening 9 side defined by the intermediate pillar P, respectively. The bulkhead 6 is provided at a position corresponding to the vehicle width direction side terminal of the floor cross member 7 of the passenger compartment floor F.

バルクヘッド６は前後位置に間隔をおいて平行一対に設けられ、両バルクヘ
ッド６の車内側の側縁間を板状の連結部６２で連結して一体成形されている。各バルクヘッド６はほぼ四角形の金属板で、リィンフォースメント２とインナパネル１１とで形成された閉断面内に設けられ、バルクヘッド６の外周の上縁フランジ、車外側の側縁フランジおよび下縁フランジをリィンフォースメント２の内面に溶接固定し、バルクヘッド６の車内側の側縁をインナパネル１１に近接対向せしめて上記閉断面を前後に仕切るように設置されている。 The bulkheads 6 are provided in parallel in pairs at the front and rear positions and are integrally formed by connecting the side edges on the vehicle inner side of the bulkheads 6 with plate-like connecting portions 62. Each bulkhead 6 is a substantially rectangular metal plate and is provided in a closed cross section formed by the reinforcement 2 and the inner panel 11, and has an upper edge flange, an outer side edge flange and a lower side of the outer circumference of the bulkhead 6. An edge flange is welded and fixed to the inner surface of the reinforcement 2, and the side edge of the bulkhead 6 on the inner side of the bulkhead 6 is opposed to the inner panel 11 so as to partition the closed cross section in the front-rear direction.

バルクヘッド６は、重量増加を抑えるように板厚を必要最小限に薄くし、かつ板面に抜き穴６３等を設けて軽量化を図ることが行なわれている。一方では板厚が薄くても側面衝突の衝突荷重に備えて、バルクヘッド６の板面に車幅方向水平に延びる断面凸状の補強ビード６１を平行に複数設け、上記衝突荷重に対してバルクヘッド６の面剛性を強化するようにしている。
特開平１０−５９２１８号公報 The bulkhead 6 is made lighter by reducing the plate thickness to the minimum necessary so as to suppress an increase in weight, and by providing a hole 63 or the like on the plate surface. On the other hand, a plurality of reinforcing beads 61 having a convex cross section extending in the vehicle width direction are provided in parallel on the plate surface of the bulkhead 6 in order to prepare for a collision load of a side collision even if the plate thickness is thin. The surface rigidity of the head 6 is enhanced.
JP-A-10-59218

ところで、補強ビード６１を水平に設けた従来のバルクヘッド６では次のような課題があった。比較的大径のタイヤが装備された最低地上高の高いＳＵＶ等ではロッカー１も高位置となり、図６に示すように、側面衝突時に相手車両Ｔのバンパー等が直にロッカー１に衝突するので、車内側へ水平方向に作用する衝突荷重（白矢印Ｇ）に対して、これと平行の補強ビード６１を備えたバルクヘッド６が支えとなって、ロッカー１の断面崩れを防ぎ、衝突荷重Ｇをフロアクロスメンバ７および車室フロアＦ側へ分散させることができる。しかしながら、最低地上高の低い普通乗用車ではロッカー1の位置も低く、図７に示すように、側面衝突時に相手車両Ｔがロッカー１よりも高い位置でドアＤや中間ピラーＰに衝突することとなり、これにより中間ピラーＰの下部が車内側へ移動変形すると、中間ピラーＰと結合されたロッカー１が車内側へ引き上げられる。このロッカー１に作用する車内側かつ斜め上方への衝突荷重（白矢印Ｈ）に対して、水平方向の補強ビード６２を備えたバルクヘッド６では充分に衝突荷重Ｈを受けることができず、衝突荷重Ｈによりバルクヘッド６が潰れ変形してロッカー１が断面崩れを起こすおそれがある。ロッカー１が断面崩れを起こすとロッカー１全体の剛性が低下して側面衝突時の車体の損傷が大きくなる。   By the way, the conventional bulkhead 6 in which the reinforcing beads 61 are provided horizontally has the following problems. In an SUV or the like with a relatively low-diameter tire and a minimum ground clearance, the rocker 1 is also in a high position. As shown in FIG. 6, the bumper of the opponent vehicle T directly collides with the rocker 1 at the time of a side collision. , Against a collision load (white arrow G) acting horizontally on the inside of the vehicle, the bulkhead 6 provided with a reinforcing bead 61 parallel to the support acts as a support to prevent the rocker 1 from collapsing in cross section. Can be distributed to the floor cross member 7 and the passenger compartment floor F side. However, in a normal passenger car with a low minimum ground clearance, the position of the locker 1 is also low, and as shown in FIG. 7, the opponent vehicle T collides with the door D and the intermediate pillar P at a position higher than the locker 1 at the time of a side collision. As a result, when the lower portion of the intermediate pillar P is moved and deformed toward the inside of the vehicle, the rocker 1 coupled to the intermediate pillar P is pulled up toward the inside of the vehicle. The bulkhead 6 provided with the horizontal reinforcing beads 62 cannot sufficiently receive the collision load H against the collision load (white arrow H) acting on the rocker 1 and obliquely upward. The bulkhead 6 may be crushed and deformed by the load H, and the rocker 1 may collapse. If the cross section of the rocker 1 is broken, the rigidity of the entire rocker 1 is lowered and the vehicle body is greatly damaged during a side collision.

そこで本発明は、最低地上高の低い普通乗用車等において、車両の側面衝突時にロッカーに作用する車内側かつ斜め上方への衝突荷重に対して、強度の高いバルクヘッドを設けてロッカーの断面崩れを防止し、ロッカーの剛性を強化する車体下部構造を提供することを課題としてなされたものである。   In view of this, the present invention provides a bulkhead having a high strength against a collision load on the inside and obliquely upward acting on the rocker at the time of a side collision of the vehicle in an ordinary passenger vehicle or the like having a low minimum ground clearance, thereby breaking the cross section of the rocker. An object of the present invention is to provide a vehicle body lower structure that prevents and enhances the rigidity of a rocker.

本発明は、車体の側面の下縁を構成する閉断面のロッカーの内部に、その閉断面をロッカーの長手方向に仕切るように金属板からなるバルクヘッドが設置された車体下部構造において、上記バルクヘッドの板面に、その車外側の下方位置から車内側の上方位置へ向かって斜め上方へ傾斜状の延びる補強ビードを設ける（請求項１）。バルクヘッドの板面に車内側斜め上方へ延びる補強ビードを設けたので、車両の側面衝突時にロッカーに作用する車内側斜め上方への衝突荷重に対して、バルクヘッドの面剛性を強化でき、上記衝突荷重によるロッカーの閉断面崩れを防止する。   The present invention relates to a vehicle body lower structure in which a bulkhead made of a metal plate is installed inside a rocker having a closed cross section constituting a lower edge of a side surface of a vehicle body so as to partition the closed cross section in the longitudinal direction of the rocker. On the plate surface of the head, a reinforcing bead extending obliquely upward from a lower position outside the vehicle toward an upper position inside the vehicle is provided (Claim 1). Since the reinforcing bead extending diagonally upward on the inside of the vehicle is provided on the plate surface of the bulkhead, the surface rigidity of the bulkhead can be strengthened against a collision load on the diagonally upward of the vehicle that acts on the rocker at the time of a vehicle side collision. Prevents collapse of the closed section of the rocker due to impact load.

上記ロッカーは、車外側のアウタパネルと、アウタパネルの内部に沿って設置されたリィンフォースメントと、車内側のインナパネルとで形成され、上記リィンフォースメントとインナパネルとで形成された閉断面内に上記バルクヘッドを設置する。上記補強ビードを、上記リィンフォースメントとインナパネルとでなす閉断面の車外側の下縁コーナー部と車内側の上縁コーナー部との間を結ぶ対角線に沿って直線状に形成する（請求項２）。これによれば、バルクヘッドによりロッカーの閉断面崩れを効果的に防止できる。   The locker is formed of an outer panel on the outer side of the vehicle, a reinforcement installed along the inside of the outer panel, and an inner panel on the inner side of the vehicle. Install the bulkhead. The reinforcing bead is formed in a straight line along a diagonal line connecting a lower edge corner portion on the vehicle outer side with a closed cross section formed by the reinforcement and an inner panel and an upper edge corner portion on the vehicle inner side. 2). According to this, the collapse of the closed cross section of the rocker can be effectively prevented by the bulk head.

上記バルクヘッドにはその下縁に、上記補強ビードとほぼ平行に直線状に延びる補強フランジを形成する（請求項３）。補強ビードとともに補強フランジ
が衝突荷重に対するバルクヘッドの剛性を強化する。 The bulkhead is formed at its lower edge with a reinforcing flange extending in a straight line substantially parallel to the reinforcing bead. The reinforcement flanges along with the reinforcement beads enhance the bulkhead's rigidity against impact loads.

上記ロッカー内の前後位置にそれぞれ、前後に対向する一対の上記バルクヘッドを設け、両バルクヘッドをそれらの車内側の側縁間または上縁間を連結部で連結して一体構造となす（請求項４）。前後一対のバルクヘッドがロッカーの閉断面崩れを効果的に防止できる。   A pair of bulkheads facing the front and rear are provided at the front and rear positions in the rocker, respectively, and both bulkheads are connected by a connecting portion between the side edges or the upper edges of the inside of the vehicle to form an integrated structure (claim) Item 4). A pair of front and rear bulkheads can effectively prevent collapse of the closed cross section of the rocker.

上記バルクヘッドを、車室フロアに沿って車幅方向に延びるフロアクロスメンバの側端部と対向する位置に設ける（請求項５）。衝突荷重をロッカー側から車室フロア側へ効率よく伝達できる。   The bulkhead is provided at a position facing a side end portion of a floor cross member extending in the vehicle width direction along the passenger compartment floor. The collision load can be efficiently transmitted from the locker side to the passenger compartment floor side.

図４に示す普通乗用車等のロッカーに本発明を適用した実施形態を説明する。図１、図２および図４に示すように、車室フロアＦの側縁に沿って前後方向に延びるロッカー１は、車外側より車内側へ向かって開口する断面ほぼハット形のアウタパネル１０と、アウタパネル１０の内面に沿う断面ほぼハット形のリィンフォースメント２と、これらとは逆に車外側へ向かって開口する浅い断面ほぼハット形のインナパネル１１とで構成してあり、これら各パネル１０，２，１１の上縁フランジ同士、下縁フランジ同士を一体に重合結合して閉断面構造をなす。   An embodiment in which the present invention is applied to a locker such as an ordinary passenger car shown in FIG. 4 will be described. As shown in FIGS. 1, 2, and 4, the rocker 1 extending in the front-rear direction along the side edge of the passenger compartment floor F includes an outer panel 10 having a substantially hat-shaped cross section that opens from the vehicle exterior toward the vehicle interior, Reinforcement 2 having a substantially hat-shaped cross section along the inner surface of the outer panel 10 and an inner panel 11 having a shallow cross-sectional shape that opens toward the outside of the vehicle, on the contrary, each of these panels 10, The upper and lower edge flanges 2 and 11 and the lower edge flanges are integrally joined together to form a closed cross-sectional structure.

ロッカー１は、車体側面のフロントドア開口８およびリヤドア開口９の下縁をなし、前後中間位置にはその上面に中間ピラーＰの下端が結合してある。またロッカー1の車内側面には、車室フロアＦ上に沿って車幅方向に延びる複数のフロアクロスメンバ７の車外側の端末が結合してある。尚、フロアクロスメンバ７は断面ほぼハット形で、車室フロアＦとで閉断面を形成し、フロントドア開口８，中間ピラーＰおよびリヤドア開口９に対応する位置にそれぞれ前後に間隔をおいて設置してある。   The locker 1 forms the lower edge of the front door opening 8 and the rear door opening 9 on the side of the vehicle body, and the lower end of the intermediate pillar P is coupled to the upper surface of the front and rear intermediate positions. Further, on the vehicle inner side surface of the locker 1, terminals on the vehicle outer side of a plurality of floor cross members 7 extending in the vehicle width direction along the vehicle compartment floor F are coupled. The floor cross member 7 has a substantially hat-shaped cross section, forms a closed cross section with the passenger compartment floor F, and is installed at a position corresponding to the front door opening 8, the intermediate pillar P, and the rear door opening 9 with an interval in the front-rear direction. It is.

ロッカー１にはフロントドア開口８側のフロアクロスメンバ７に対応する位置およびリヤドア開口９側のフロアクロスメンバ７に対応する位置にそれぞれ、リィンフォースメント２とインナパネル１１とで形成される閉断面を前後方向に仕切る複数のバルクヘッド３，３Ａが設けてある。各バルクヘッド３，３Ａは比較的板厚の薄い金属板で形成してある。   The locker 1 has a closed cross section formed by the reinforcement 2 and the inner panel 11 at a position corresponding to the floor cross member 7 on the front door opening 8 side and a position corresponding to the floor cross member 7 on the rear door opening 9 side, respectively. Are provided with a plurality of bulkheads 3 and 3A. Each of the bulkheads 3 and 3A is formed of a metal plate having a relatively thin plate thickness.

図１、図２、図４に示すように、フロントドア開口８側のバルクヘッド３は、フロアクロスメンバ７の前壁の端末および後壁の端末に応じて前後に所定の間隔をおいて一対設けてある。両バルクヘッド３は、車内側の端縁を板状の連結部３９で連結されたコ字形で前後一体に形成してある。   As shown in FIGS. 1, 2, and 4, the bulkhead 3 on the front door opening 8 side is paired with a predetermined distance in the front and rear according to the front wall terminal and the rear wall terminal of the floor cross member 7. It is provided. Both bulkheads 3 are integrally formed in the front and rear in a U shape in which the inner edge of the vehicle is connected by a plate-like connecting portion 39.

バルクヘッド３にはその板面３０の上縁、車外側の側縁および下縁の車外側に、板面３０からほぼ直角に屈曲する上縁フランジ３１、側縁フランジ３２および下縁フランジ３３が形成してある。バルクヘッド３は、リィンフォースメント２内に配し、各フランジ３１，３２，３３の中間部にそれぞれ設けた溶接部３４を、リィンフォースメント２の上壁２１の内面、縦壁２２の内面および下壁２３の内面に重合溶接するとともに、板面３０の車内側の側縁３５をインナパネル１１の縦壁内面に近接対向せしめてある。   The bulkhead 3 has an upper edge flange 31, a side edge flange 32, and a lower edge flange 33 that are bent substantially at right angles from the plate surface 30 on the upper edge, the outer edge and the lower edge of the plate surface 30. It is formed. The bulkhead 3 is arranged in the reinforcement 2, and welds 34 provided at intermediate portions of the flanges 31, 32, 33 are respectively connected to the inner surface of the upper wall 21 of the reinforcement 2, the inner surface of the vertical wall 22, and The inner surface of the lower wall 23 is superposed and welded, and the side edge 35 on the inner side of the plate surface 30 is made to face the inner surface of the inner wall 11 in close proximity.

バルクヘッド３の板面３０には、リィンフォースメント２とインナパネル１１とからなる閉断面の車外側の下縁コーナー部と車内側の上縁コーナー部との間を結ぶ対角線に沿って車内側斜め上方へ延びる補強ビード３６が形成してある。補強ビード３６はバルクヘッド３の板面３０を断面ほぼ凸状にプレス加工してあり、板面３０の車外側の側縁と下縁との間の隅角部から上縁と車内側の側縁との間の隅角へ向かって板面３０のほぼ中央を通る直線状に形成してある。補強ビード３６の幅は約１０〜１５ｍｍに設定してある。   On the plate surface 30 of the bulkhead 3, the vehicle inner side along a diagonal line connecting the lower edge corner portion of the outer side of the vehicle and the upper edge corner portion of the inner side of the closed section composed of the reinforcement 2 and the inner panel 11. A reinforcing bead 36 extending obliquely upward is formed. The reinforcing bead 36 is formed by pressing the plate surface 30 of the bulkhead 3 so as to have a substantially convex cross section. From the corner between the outer edge and the lower edge of the plate surface 30, the upper edge and the inner side of the vehicle. It is formed in a straight line passing through the substantially center of the plate surface 30 toward the corner between the edges. The width of the reinforcing bead 36 is set to about 10 to 15 mm.

バルクヘッド３の板面３０には、補強ビード３６の上下位置にそれぞれ、バルクヘッド３の軽量化を図る円形または長円形の抜き孔３７が形成してある。また、上記連結部３９にも複数の抜き孔３７が設けてある。   On the plate surface 30 of the bulkhead 3, circular or oval holes 37 for reducing the weight of the bulkhead 3 are formed at the upper and lower positions of the reinforcing beads 36, respectively. The connecting portion 39 is also provided with a plurality of holes 37.

更に、バルクヘッド３の板面３０にはその下縁の車内側半部に、上記補強ビード３６とほぼ平行に車内側斜め上方へ延びる補強フランジ３８が形成してある。補強フランジ３８は板面３０からほぼ直角に屈曲形成してあり、車外側の下縁フランジ３３と一連に形成してある。   Further, the plate surface 30 of the bulkhead 3 is formed with a reinforcing flange 38 extending obliquely upward inward of the vehicle, substantially parallel to the reinforcing bead 36, in the lower half of the vehicle inner side. The reinforcing flange 38 is bent at a substantially right angle from the plate surface 30 and is formed in series with the lower edge flange 33 on the outside of the vehicle.

図３はロッカー３内のリヤドア開口９側に設けるバルクヘッド３Ａを示すもので、前後一対のバルクヘッド３Aは、板面３０に車内側斜め上方へ延びる補強ビード３６と板面３０の下縁の車内側半部に補強フランジ３８を備え、その基本構造はフロントドア開口８側のバルクヘッド３のそれと同様である。前後のバルクヘッド３Ａは板面３０の上縁が板状の連結部３９Ａで連結されたコ字形に一体形成してある。またバルクヘッド３Ａには板面３０の車内側の側縁に側縁フランジ３５が形成してある。   FIG. 3 shows a bulkhead 3A provided on the side of the rear door opening 9 in the rocker 3. The pair of front and rear bulkheads 3A are provided with a reinforcing bead 36 extending obliquely upward on the inner side of the plate surface 30 and a lower edge of the plate surface 30. A reinforcing flange 38 is provided in the inner half of the vehicle, and its basic structure is the same as that of the bulkhead 3 on the front door opening 8 side. The front and rear bulkheads 3A are integrally formed in a U shape in which the upper edge of the plate surface 30 is connected by a plate-like connecting portion 39A. Further, a side edge flange 35 is formed on the side edge of the plate surface 30 on the vehicle inner side of the bulkhead 3A.

図略ではあるが、バルクヘッド３Ａは、リィンフォースメント２内に配し、連結部３９Ａに設けた溶接部３４と各フランジ３２，３３の溶接部３４をそれぞれ、リィンフォースメント２の上壁の内面、縦壁の内面および下壁の内面に重合溶接するとともに、板面３０の車内側の側縁フランジ３５をインナパネル１１の縦壁内面に近接対向せしめて設置してある。   Although not shown, the bulkhead 3A is arranged in the reinforcement 2, and the welded portion 34 provided on the connecting portion 39A and the welded portion 34 of each flange 32, 33 are respectively connected to the upper wall of the reinforcement 2. Superposition welding is performed on the inner surface, the inner surface of the vertical wall, and the inner surface of the lower wall, and the side edge flange 35 on the vehicle inner side of the plate surface 30 is disposed in close proximity to the inner surface of the inner wall of the inner panel 11.

図１に示すように、車両の側面衝突時に相手方車両Ｔのバンパー等がロッカー１よりも高い位置でドアＤや中間ピラーＰに衝突し、中間ピラーＰの下部が車内側へ移動変形すると、中間ピラーＰの変形の影響を受けてロッカー１にはこれを車内側へ引き上げようとする衝突荷重（矢印Ｈ）が作用する。特に、車外側のアウタパネル１０およびインナパネル１１が衝突荷重Ｈの影響を顕著に受けることとなる。   As shown in FIG. 1, when a bumper or the like of the opponent vehicle T collides with the door D or the intermediate pillar P at a position higher than the locker 1 at the time of a side collision of the vehicle, Under the influence of the deformation of the pillar P, a collision load (arrow H) is applied to the rocker 1 to pull it up to the vehicle interior side. In particular, the outer panel 10 and the inner panel 11 outside the vehicle are significantly affected by the collision load H.

本実施形態によれば、ロッカー１内に設けたバルクヘッド３の板面３０に車内側斜め上方へ延びる補強ビード３６を設けてその延在方向を上記衝突荷重Ｈの作用方向に合致せしめたので、衝突荷重Ｈに対する板面３０の面剛性が強化され、側面衝突時にバルクヘッド３は潰れ変形しにくい。従ってロッカー１は、アウタパネル１０とリィンフォースメント２との間の閉断面が潰れ変形するのみで、最小限の断面崩れですむ。   According to the present embodiment, the reinforcing bead 36 extending obliquely upward on the vehicle interior side is provided on the plate surface 30 of the bulkhead 3 provided in the rocker 1, and the extending direction thereof is matched with the direction of action of the collision load H. The surface rigidity of the plate surface 30 with respect to the collision load H is strengthened, and the bulkhead 3 is not easily crushed and deformed at the time of a side collision. Therefore, the rocker 1 can be minimally collapsed only by the collapse of the closed cross section between the outer panel 10 and the reinforcement 2.

またバルクヘッド３には板面３０の下縁に、補強ビード３６とほぼ平行に車内側斜め上方へ延びる補強フランジ３８を設けたので、補強ビード３６の補強効果に加えて補強フランジ３８の補強効果が発揮されるので、側面衝突時のバルクヘッド３の潰れ変形を確実に防止することができる。   Since the bulkhead 3 is provided with a reinforcing flange 38 extending obliquely upward inward of the vehicle at the lower edge of the plate surface 30 substantially parallel to the reinforcing bead 36, the reinforcing effect of the reinforcing flange 38 in addition to the reinforcing effect of the reinforcing bead 36 is provided. Therefore, it is possible to reliably prevent the bulkhead 3 from being crushed and deformed at the time of a side collision.

更にバルクヘッド３は、フロアクロスメンバ７の端末に対応する位置で、フロアクロスメンバ７の前壁および後壁に対向して前後一対設けたので、衝突荷重Ｈをフロアクロスメンバ７および車室フロアＦ側へ効率よく伝達でき、荷重を広い範囲へ分散できる。また、前後のバルクヘッド３はその車内側を連結部３９で連結したので、側面衝突時に両バルクヘッド３は前後位置の平行な設置状態を維持でき、バルクヘッド３の潰れ変形をより確実に防止することができる。   Further, since the bulkhead 3 is provided in a pair corresponding to the front and rear walls of the floor cross member 7 at a position corresponding to the terminal of the floor cross member 7, a collision load H is applied to the floor cross member 7 and the passenger compartment floor. It can transmit efficiently to the F side and distribute the load over a wide range. In addition, since the front and rear bulkheads 3 are connected to each other by a connecting portion 39, both bulkheads 3 can maintain the parallel installation state at the front and rear positions at the time of a side collision, and more reliably prevent the bulkhead 3 from being crushed and deformed. can do.

ロッカー３内のリヤドア開口９側のバルクヘッド３Ａも側面衝突時にフロントドア開口８側のバルクヘッド３と同様な作用効果を発揮する。   The bulkhead 3A on the rear door opening 9 side in the locker 3 also exhibits the same effect as the bulkhead 3 on the front door opening 8 side at the time of a side collision.

尚、上述の実施形態はすべての点で例示であって本発明の範囲を限定するものではなく、本発明は上述の実施形態を様々に変形、変更したものも含まれる。例えば、上述の実施形態では、バルクヘッド３，３Ａの板面３０の補強ビード３を１条としたが、これに限らず、板面３０に平行に２条形成してもよい。また各フロアクロスメンバ７に対してバルクヘッド３，３Ａを前後一対設けたが、単体のバルクヘッド３，３Ａでもよい。   In addition, the above-mentioned embodiment is an illustration in all points, and does not limit the scope of the present invention, and the present invention includes various modifications and changes to the above-described embodiment. For example, in the above-described embodiment, the reinforcing beads 3 of the plate surface 30 of the bulkheads 3, 3 </ b> A are set as one line, but the present invention is not limited thereto, and two lines may be formed in parallel to the plate surface 30. Further, although a pair of front and rear bulkheads 3 and 3A are provided for each floor cross member 7, a single bulkhead 3 and 3A may be used.

本発明の車体下部構造を示すもので、図４のＣ−Ｃ線に沿う断面図である。FIG. 5 is a cross-sectional view taken along the line CC of FIG. 4, showing the lower body structure of the present invention. 本発明の車体下部構造に用いるバルクヘッドの斜視図である。It is a perspective view of the bulkhead used for the vehicle body lower part structure of this invention. 本発明の車体下部構造に用いる他のバルクヘッドの斜視図である。It is a perspective view of the other bulkhead used for the vehicle body lower part structure of this invention. 本発明を適用する車体下部構造の要部斜視図である。It is a principal part perspective view of the vehicle body lower structure to which this invention is applied. 従来の車体下部構造に用いるバルクヘッドの斜視図である。It is a perspective view of the bulkhead used for the conventional vehicle body lower part structure. 図１に対応して、従来のＳＵＶ等の車体下部構造を示す図４のＣ−Ｃ線に沿う断面である。Corresponding to FIG. 1, it is a cross section taken along the line CC of FIG. 4 showing a conventional vehicle lower body structure such as SUV. 図１に対応して、従来の普通乗用車の車体下部構造を示す図４のＣ−Ｃ線に沿う断面である。FIG. 5 is a cross-sectional view taken along line CC of FIG. 4 showing a lower body structure of a conventional ordinary passenger car corresponding to FIG. 1.

符号の説明Explanation of symbols

１ ロッカー
１０ アウタパネル
１１ インナパネル
２ リィンフォースメント
３，３Ａ バルクヘッド
３０ 板面
３６ 補強ビード
３８ 補強フランジ
３９，３９Ａ 連結部
７ フロアクロスメンバ DESCRIPTION OF SYMBOLS 1 Rocker 10 Outer panel 11 Inner panel 2 Reinforcement 3, 3A Bulk head 30 Plate surface 36 Reinforcement bead 38 Reinforcement flange 39, 39A Connection part 7 Floor cross member

Claims (5)

車体の側面の下縁を構成する閉断面のロッカーの内部に、その閉断面をロッカーの長手方向に仕切るように金属板からなるバルクヘッドが設置された車体下部構造において、
上記バルクヘッドの板面に、その車外側の下方位置から車内側の上方位置へ向かって斜め上方へ傾斜状の延びる補強ビードを設けたことを特徴とする車体下部構造。 In the vehicle body lower structure in which the bulkhead made of a metal plate is installed inside the rocker of the closed section constituting the lower edge of the side surface of the vehicle body so as to partition the closed section in the longitudinal direction of the rocker,
A vehicle body lower structure characterized in that a reinforcing bead extending obliquely upward from a lower position outside the vehicle toward an upper position inside the vehicle is provided on a plate surface of the bulkhead. 上記ロッカーは、車外側のアウタパネルと、アウタパネルの内部に沿って設置されたリィンフォースメントと、車内側のインナパネルとで形成され、
上記リィンフォースメントとインナパネルとで形成された閉断面内に上記バルクヘッドを設置し、
上記補強ビードを、上記リィンフォースメントとインナパネルとでなす閉断面の車外側の下縁コーナー部と車内側の上縁コーナー部との間を結ぶ対角線に沿って直線状に形成した請求項１に記載の車体下部構造。 The locker is formed of an outer panel on the vehicle outer side, a reinforcement installed along the inside of the outer panel, and an inner panel on the vehicle inner side,
The bulkhead is installed in a closed cross section formed by the reinforcement and the inner panel,
2. The reinforcing bead is formed in a straight line along a diagonal line connecting a lower edge corner portion on the vehicle outer side and an upper edge corner portion on the vehicle inner side having a closed cross section formed by the reinforcement and the inner panel. The vehicle body lower structure as described in 2. 上記バルクヘッドにはその下縁に、上記補強ビードとほぼ平行に直線状に延びる補強フランジを形成した請求項１または２に記載の車体下部構造。   The vehicle body lower part structure according to claim 1 or 2, wherein a reinforcing flange is formed on the lower edge of the bulkhead so as to extend linearly in parallel with the reinforcing bead. 上記ロッカー内の前後位置にそれぞれ、前後に対向する一対の上記バルクヘッドを設け、両バルクヘッドをそれらの車内側の側縁間または上縁間を連結部で連結して一体構造となした請求項１ないし３に記載の車体下部構造。   A pair of bulkheads facing each other in the front-rear position in the rocker are provided, and both bulkheads are connected by connecting portions between the side edges or the upper edges inside the vehicle to form an integrated structure. Item 4. The vehicle body lower structure according to Items 1 to 3. 上記バルクヘッドを、車室フロアに沿って車幅方向に延びるフロアクロスメンバの側端部と対向する位置に設けた請求項１ないし４に記載の車体下部構造。   The vehicle body lower structure according to claim 1, wherein the bulkhead is provided at a position facing a side end portion of a floor cross member extending in the vehicle width direction along the passenger compartment floor.
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JP2010228642A (en) * 2009-03-27 2010-10-14 Mazda Motor Corp Lower vehicle-body structure of vehicle
CN102452424A (en) * 2010-10-20 2012-05-16 马自达汽车株式会社 Frame for vehicle
JP2012136178A (en) * 2010-12-27 2012-07-19 Mazda Motor Corp Hollow structure disposed with foaming reinforcement member, and method for manufacturing the same
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JP2015113061A (en) * 2013-12-13 2015-06-22 マツダ株式会社 Vehicular side part body structure
WO2015087782A1 (en) * 2013-12-13 2015-06-18 マツダ株式会社 Structure for side part of body of vehicle
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JP2015174607A (en) * 2014-03-18 2015-10-05 本田技研工業株式会社 Vehicle body structure
JP2017043136A (en) * 2015-08-24 2017-03-02 マツダ株式会社 Vehicle body structure
CN107554610A (en) * 2016-07-01 2018-01-09 上汽通用五菱汽车股份有限公司 A kind of reinforced rear big beam assembly
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JP2018188086A (en) * 2017-05-11 2018-11-29 本田技研工業株式会社 Vehicle body lower structure
JP2021146885A (en) * 2020-03-19 2021-09-27 株式会社豊田自動織機 Floor structure of vehicle body
JP7290131B2 (en) 2020-03-19 2023-06-13 株式会社豊田自動織機 car body floor structure

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