JP6157875B2 - Front door structure of center pillarless vehicle - Google Patents

Front door structure of center pillarless vehicle Download PDF

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JP6157875B2
JP6157875B2 JP2013037754A JP2013037754A JP6157875B2 JP 6157875 B2 JP6157875 B2 JP 6157875B2 JP 2013037754 A JP2013037754 A JP 2013037754A JP 2013037754 A JP2013037754 A JP 2013037754A JP 6157875 B2 JP6157875 B2 JP 6157875B2
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reinforcing member
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door
extension
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彰泰 木船
彰泰 木船
伊藤　禎
禎 伊藤
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Daihatsu Motor Co Ltd
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Description

本発明は、センターピラーを備えないセンターピラーレス車両のフロントドア構造に関する。   The present invention relates to a front door structure for a center pillar-less vehicle that does not include a center pillar.

センターピラーを備えない車両のフロントドア構造として、従来、フロントドアの後端部内に、該ドアの略上端から下端まで延びるピラーレス補強部材を配設し、該補強部材とドアインナパネルとで上下方向に延びる閉断面を形成したもの（例えば特許文献１参照）、あるいはドアベルトライン部にベルトライン補強部材を配設したもの（例えば特許文献２参照）がある。   As a front door structure of a vehicle without a center pillar, conventionally, a pillarless reinforcing member extending from a substantially upper end to a lower end of the door is disposed in the rear end portion of the front door, and the vertical direction is defined by the reinforcing member and the door inner panel. (For example, refer to Patent Document 1), or a belt belt reinforcing member disposed on a door belt line portion (for example, refer to Patent Document 2).

特許４１１３７３３号公報Japanese Patent No. 4113733 特許４１５４９９６号公報Japanese Patent No. 4154996

ところでセンターピラーを備えた車両の場合、車両の正面衝突時には、衝突荷重を、ベルトライン補強部材をセンターピラーに突き当てることによりセンターピラーに伝達し、さらに車両後方に伝達することとなる。しかしセンターピラーを備えない車両の場合、フロントドア後端部に上下方向に延びるピラーレス補強部材を配設し、前記衝突荷重を該ピラーレス補強部材に伝達すると共に上，下に分散させることが必要と考えられる。   By the way, in the case of a vehicle equipped with a center pillar, at the time of a frontal collision of the vehicle, the collision load is transmitted to the center pillar by abutting the beltline reinforcing member against the center pillar, and further transmitted to the rear of the vehicle. However, in the case of a vehicle without a center pillar, it is necessary to dispose a pillarless reinforcing member extending in the vertical direction at the rear end portion of the front door so as to transmit the collision load to the pillarless reinforcing member and to distribute it upward and downward. Conceivable.

前記特許文献１，２は、ピラーレス補強部材を配設する点、あるいはベルトライン補強部材を配設する点は開示されているものの、ベルトライン補強部材とピラーレス補強部材との接合関係については不明であるため、前記衝突荷重を上下に分散させる効果が得られるか否かは不明である。 Although Patent Documents 1 and 2 disclose that the pillarless reinforcing member is disposed or the beltline reinforcing member is disposed, the joint relationship between the beltline reinforcing member and the pillarless reinforcing member is unknown. Therefore, it is unclear whether or not the effect of dispersing the collision load vertically can be obtained.

本発明は、前記従来の状況に鑑みてなされたもので、車両の正面衝突時の衝突荷重をピラーレス補強部材に伝達すると共に上，下に分散させることができ、かつ側面衝突時の衝突荷重についても上下に分散させることができるようにし、かつコスト，重量的にも最適にしたセンターピラーレス車両のフロントドア構造を提供することを課題としている。 The present invention has been made in view of the above-described conventional situation. The collision load at the time of a frontal collision of a vehicle can be transmitted to the pillarless reinforcing member and can be distributed upward and downward, and the collision load at the time of a side collision. It is an object of the present invention to provide a front door structure for a center pillar-less vehicle that can be dispersed in the vertical direction and optimized in terms of cost and weight.

請求項１の発明は、フロントドアの後端部内に、ドア上下端近傍まで延びるピラーレス補強部材を配設し、該ピラーレス補強部材とドアインナパネルとで上下方向に延びる閉断面を形成し、ドアベルトライン部にベルトライン補強部材を配設したセンターピラーレス車両のフロントドア構造において、
前記ピラーレス補強部材の、少なくとも前記ベルトライン部近傍部分は、横断面平面視で、車幅方向外方を向いた基部面と、該基部面の前縁に続いて車幅方向内側に折り曲げられて車両前方を向いた前側縦壁面とを有し、前記ベルトライン補強部材の後端部には、延設部が設けられ、該延設部は、前記ベルトライン補強部材からの荷重を前記ピラーレス補強部材に伝達する伝達部と、該伝達部に続いて上，下方向に延びると共に前記ピラーレス補強部材に固定された上延長部及び下延長部とを有し、側面視で大略Ｔ字形状をなしており、前記伝達部は、前記ピラーレス補強部材の前記前側縦壁面に当接する後側縦壁面を有し、前記上延長部は下延長部より長いことを特徴としている。 According to the first aspect of the present invention, a pillarless reinforcing member extending to the vicinity of the upper and lower ends of the door is disposed in the rear end portion of the front door, and a closed cross section extending in the vertical direction is formed by the pillarless reinforcing member and the door inner panel. In the front door structure of the center pillarless vehicle in which the beltline reinforcing member is arranged in the beltline part,
At least a portion near the belt line portion of the pillarless reinforcing member is bent inward in the vehicle width direction following a base surface facing outward in the vehicle width direction and a front edge of the base surface in a cross-sectional plan view. A front vertical wall facing the front of the vehicle, and an extension portion is provided at a rear end portion of the belt line reinforcement member, and the extension portion reinforces the pillarless reinforcement with a load from the belt line reinforcement member. It has a transmission part that transmits to the member, and an upper extension part and a lower extension part that extend upward and downward following the transmission part and are fixed to the pillarless reinforcing member, and are generally T-shaped in a side view. The transmission portion has a rear vertical wall surface that abuts on the front vertical wall surface of the pillarless reinforcing member, and the upper extension portion is longer than the lower extension portion .

請求項１に係るセンターピラーレス車両のフロントドア構造によれば、ピラーレス補強部材に前側縦壁面を、ベルトライン補強部材の延設部の伝達部に後側縦壁面をそれぞれ形成し、該両縦壁面を当接させたので、車両正面衝突時の衝突荷重をベルトライン補強部材から前記縦壁面の広い当接面積を介してピラーレス補強部材に確実に伝達でき、さらに延設部の、前記伝達部に延長形成された上，下延長部により上，下に確実に分散させることができる。   According to the front door structure of the center pillarless vehicle according to claim 1, the front vertical wall surface is formed on the pillarless reinforcing member, and the rear vertical wall surface is formed on the transmission portion of the extending portion of the beltline reinforcing member. Can be reliably transmitted from the beltline reinforcement member to the pillarless reinforcement member via the wide contact area of the vertical wall surface, and further to the transmission portion of the extension portion. The upper and lower extensions can be reliably dispersed upward and downward.

ところで前記ピラーレス補強部材が、前記ベルトライン対向部分付近で断面係数が大きく変化する断面形状に構成される場合があり、この断面係数の変化する部分が側面衝突荷重に対する剛性上の断点となる場合がある。本発明では、前記延設部は、ピラーレス補強部材のベルトライン対向部分を覆うように固定されているので、該ピラーレス補強部材のベルトライン対向部分を補強することとなる。そのため、ピラーレス補強部材のベルトライン対向部分が側面衝突荷重に対する剛性上の断点となる問題を回避できる。 By the way, the pillarless reinforcing member may be configured in a cross-sectional shape in which the section modulus changes greatly in the vicinity of the belt line facing portion, and the portion in which the section modulus changes becomes a break point in rigidity with respect to a side collision load. There is. In the present invention, since the extending portion is fixed so as to cover the belt line facing portion of the pillarless reinforcing member, the belt line facing portion of the pillarless reinforcing member is reinforced. Therefore, it is possible to avoid the problem that the belt line facing portion of the pillarless reinforcing member becomes a rigidity break point with respect to the side collision load.

このように本発明では、簡単な構造により、正面衝突時の衝突荷重をピラーレス補強部材に伝達させると共に上，下に分散させることができ、また側面衝突時の荷重についてもピラーレス補強部材に伝達，分散させることができ、側面衝突荷重専用部品を要しない分コスト，重量的にも有利である。   As described above, according to the present invention, the collision load at the time of a frontal collision can be transmitted to the pillarless reinforcing member and distributed upward and downward by a simple structure, and the load at the time of a side collision can also be transmitted to the pillarless reinforcing member. It can be dispersed and is advantageous in terms of cost and weight because it does not require special parts for side impact loads.

また、本発明によれば、上延長部を下延長部より長くしたので、前記ピラーレス補強部材の断面係数が前記ベルトライン対向部分付近で変化するように、具体的には前記対向部分より上側の断面係数が下側より小さくなるように構成されている場合の側面衝突荷重に対する剛性上の断点となる問題を、コスト，重量増加を来すことなくより確実に回避できる。 Further, according to the present invention, since the upper extension portion is made longer than the lower extension portion, specifically, the section modulus of the pillarless reinforcing member is changed in the vicinity of the belt line opposing portion, specifically, the upper portion is higher than the opposing portion. It is possible to more reliably avoid the problem that becomes a break point in rigidity with respect to a side collision load when the section modulus is configured to be smaller than the lower side without increasing cost and weight.

本発明の実施例１によるセンターピラーレス車両のフロントドア構造を備えたフロントドアの車両外側方から見た側面図である。It is the side view seen from the vehicle outer side of the front door provided with the front door structure of the center pillarless vehicle by Example 1 of the present invention. 前記フロントドア構造の要部の側面図である。It is a side view of the principal part of the front door structure. 前記フロントドア構造のピラーレス補強部材の断面平面図（図１のIII-III線断面図)である。FIG. 3 is a cross-sectional plan view (a cross-sectional view taken along line III-III in FIG. 1) of the pillarless reinforcing member having the front door structure. 前記フロントドア構造のピラーレス補強部材とベルトライン補強部材の接続部分の断面平面図（図１のIV-IV線断面図)である。FIG. 4 is a cross-sectional plan view (a cross-sectional view taken along line IV-IV in FIG. 1) of a connection portion between the pillarless reinforcing member and the belt line reinforcing member of the front door structure. 前記フロントドア構造のピラーレス補強部材の断面平面図（図１のV-V線断面図)である。FIG. 5 is a cross-sectional plan view (cross-sectional view taken along the line V-V in FIG. 1) of the pillarless reinforcing member having the front door structure. 前記フロントドア構造のピラーレス補強部材の断面平面図（図１のVI-VI線断面図)である。FIG. 6 is a cross-sectional plan view (cross-sectional view taken along line VI-VI in FIG. 1) of the pillarless reinforcing member having the front door structure. 前記フロントドア構造のピラーレス補強部材の断面平面図（図１のVII-VII線断面図)である。FIG. 7 is a cross-sectional plan view (cross-sectional view taken along line VII-VII in FIG. 1) of the pillarless reinforcing member having the front door structure. 前記センターピラーレス車両の側面図である。It is a side view of the center pillarless vehicle.

以下、本発明の実施形態を添付図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１ないし図８は本発明の実施例１に係るセンターピラーレス車両のフロントドア構造を説明するための図である。本実施例において、前，後，左，右とは、車室内側から車両前方を見た状態での前，後，左，右を意味している。   1 to 8 are views for explaining a front door structure of a center pillarless vehicle according to a first embodiment of the present invention. In this embodiment, front, rear, left, and right mean front, rear, left, and right when the vehicle front is viewed from the vehicle interior side.

図において、１はセンターピラーレス車両であり、該車両１の車体２の側面にはフロントピラー２ｂからリヤピラー２ｃに渡る大きなドア開口２ａが形成されており、該ドア開口２ａは、その中央部にセンターピラーを備えていない。前記ドア開口２ａの前部にはフロントドア３が前端部のヒンジにより車幅方向に回動可能に配設されており、後部にはリヤドア４がスライド機構により前後にスライド可能に配設されている。 In the figure, reference numeral 1 denotes a center pillar-less vehicle. A large door opening 2a extending from the front pillar 2b to the rear pillar 2c is formed on the side surface of the vehicle body 2 of the vehicle 1, and the door opening 2a is centered on the center. Does not have pillars. A front door 3 is disposed at the front portion of the door opening 2a so as to be rotatable in the vehicle width direction by a hinge at the front end portion, and a rear door 4 is disposed at the rear portion so as to be slidable back and forth by a slide mechanism. Yes.

前記フロントドア３は、アウタパネル３ａとインナパネル３ｂとを中空状をなすようにその周縁部をヘミング加工により互いに結合したものである。このフロントドア３の下半部はドアガラス昇降機構等のドア部品が収容されるドア本体３ｃとなっており、また上半部はドアガラス５を昇降可能にガイドするドアサッシュ３ｄとなっている。 The front door 3 is configured such that the outer panel 3a and the inner panel 3b are joined to each other by hemming at their peripheral portions so as to form a hollow shape. The lower half of the front door 3 is a door body 3c that accommodates door parts such as a door glass raising / lowering mechanism, and the upper half is a door sash 3d that guides the door glass 5 to be movable up and down. .

前記フロントドア３の後端部３ｅ内には、ピラーレス補強部材６が前記アウタパネル３ａとインナパネル３ｂとの間に位置するように配設されている。このピラーレス補強部材６は、前記後端部３ｅの下端近傍から上端近傍まで延びており、該ピラーレス補強部材６の上端部にはアッパ補強部材７が、下端部にはロア補強部材８がそれぞれ固着されている。これらの補強部材６，７，８は、ドアインナパネル３ｂに結合されており、該ピラーレス補強部材６，及びアッパ，ロア補強部材７，８と前記ドアインナパネル３ｂとで上下方向に延びる閉断面Ａが形成されている。 A pillarless reinforcing member 6 is disposed in the rear end portion 3e of the front door 3 so as to be positioned between the outer panel 3a and the inner panel 3b. The pillarless reinforcing member 6 extends from the vicinity of the lower end of the rear end portion 3e to the vicinity of the upper end, and the upper reinforcing member 7 is fixed to the upper end portion of the pillarless reinforcing member 6 and the lower reinforcing member 8 is fixed to the lower end portion thereof. Has been. These reinforcing members 6, 7, and 8 are coupled to the door inner panel 3b, and the pillarless reinforcing member 6, and the closed cross section that extends in the vertical direction between the upper and lower reinforcing members 7 and 8 and the door inner panel 3b. A is formed.

また前記ドアインナパネル３ｂの前記ロア補強部材８部分には、ドアインパクトビーム１１の後端部１１ａが溶接固定されている。このドアインパクトビーム１１は車両側面衝突時の衝突荷重を受け止めるためのもので、ドアアウタパネル３ａの内面に沿うように配置され、その前端部１１ｂはドアインナパネル３ｂの前縁部に溶接固定されている。 A rear end portion 11a of the door impact beam 11 is fixed by welding to the lower reinforcing member 8 portion of the door inner panel 3b. This door impact beam 11 is for receiving a collision load at the time of a vehicle side collision, and is arranged along the inner surface of the door outer panel 3a, and its front end portion 11b is welded and fixed to the front edge portion of the door inner panel 3b. Yes.

また前記フロントドア３の前記ドア本体３ｃの上縁部３ｆはドアベルトライン部となっており、該ドアベルトライン部内にはベルトライン補強部材９が配設されている。このベルトライン補強部材９は鋼製丸パイプからなり、その前端部９ａはブラケット９ｂを介してドア本体３ｃの前端部に固定されており、またその後端部９ｃは延長プレート（延設部）１０を介して前記ピラーレス補強部材６に接続されている。 The upper edge 3f of the door body 3c of the front door 3 is a door belt line portion, and a belt line reinforcing member 9 is disposed in the door belt line portion. This belt line reinforcing member 9 is made of a steel round pipe, its front end 9a is fixed to the front end of the door body 3c via a bracket 9b, and its rear end 9c is an extension plate (extension part) 10. It is connected to the pillarless reinforcing member 6 via.

前記ピラーレス補強部材６は、横断面平面視で、車幅方向外方を向いた基部面６ａと、該基部面６ａの前縁に続いて車幅方向内側に折り曲げられ、車両前方を向いた前側縦壁面６ｂとを有する。 The pillarless reinforcing member 6 has a base surface 6a facing outward in the vehicle width direction and a front side facing the front of the vehicle after being bent inward in the vehicle width direction following the front edge of the base surface 6a. And a vertical wall surface 6b.

ここで前記ピラーレス補強部材６は前記ベルトライン補強部材９が対向接続された部分より上側部分と下側部分とで断面係数が大きく異なる断面形状に構成されている。上側部分は、前記前側縦壁面６ｂから前方に折り曲げられ、前記ドアインナパネル３ｂに溶接固定された前フランジ部６ｃと、前記基部面６ａの後縁から内方に屈曲する後側縦壁面６ｄと、該後側縦壁面６ｄから後方に折り曲げられ、前記ドアインナパネル３ｂの車両後方に向く縦壁面３ｂ′に溶接固定された後フランジ部６ｅとを有する横断面ハット形状をなしている（図３，図４参照）。 Here, the pillarless reinforcing member 6 is formed in a cross-sectional shape in which the section modulus is greatly different between an upper portion and a lower portion from a portion where the beltline reinforcing member 9 is opposed to and connected thereto. The upper portion is bent forward from the front vertical wall surface 6b and is welded and fixed to the door inner panel 3b. The rear vertical wall surface 6d is bent inward from the rear edge of the base surface 6a. Further, it has a cross-sectional hat shape having a rear flange portion 6e bent rearward from the rear side vertical wall surface 6d and welded and fixed to the vertical wall surface 3b 'facing the vehicle rear side of the door inner panel 3b (FIG. 3). FIG. 4).

一方、下側部分は、前記基部面６ａ，前側縦壁面６ｂ，前フランジ部６ｃ及び後フランジ部６ｃを有するが、基部面６ａの後縁から内方に折り曲げられた後側縦壁部を有しない。しかし前記下側部分の前側縦壁面６ｂの車幅方向高さは、上側部分の前側縦壁面６ｂの略２倍となる形状に設定されている（図５，図６参照）。このように下側部分の前側縦壁面６ｂの高さが上側部分より高くなっているため、前記ピラーレス補強部材の断面係数は、下側部分が大きく、上側部分が小さくなっている。 On the other hand, the lower portion has the base surface 6a, the front vertical wall surface 6b, the front flange portion 6c, and the rear flange portion 6c, but has a rear vertical wall portion bent inward from the rear edge of the base surface 6a. do not do. However, the height in the vehicle width direction of the front vertical wall surface 6b of the lower portion is set to a shape that is approximately twice that of the front vertical wall surface 6b of the upper portion (see FIGS. 5 and 6). Thus, since the height of the front vertical wall surface 6b of the lower part is higher than that of the upper part, the sectional modulus of the pillarless reinforcing member is larger in the lower part and smaller in the upper part.

また図７に示すように、前記ロア補強部材８は、前記ピラーレス補強部材６の下端部と同様の基部面８ａ，前側縦壁面８ｂ，前フランジ部８ｃ及び後フランジ部８ｅを有し、前側縦壁面８ｂの車幅方向高さは、ピラーレス補強部材６の下端部の前側縦壁面６ｂよりさらに高く設定されている。そして前記前フランジ部８ｃは前記ドアインナパネル３ｂに溶接固定されており、一方、後フランジ部８ｅはドアインナパネル３ｂの車両後方に向く縦壁面３ｂ′に対向配置されているが、該縦壁面３ｂ′に溶接されていない。 Further, as shown in FIG. 7, the lower reinforcing member 8 has a base surface 8a, a front vertical wall surface 8b, a front flange portion 8c, and a rear flange portion 8e similar to the lower end portion of the pillarless reinforcing member 6, The height in the vehicle width direction of the wall surface 8 b is set to be higher than the front vertical wall surface 6 b at the lower end of the pillarless reinforcing member 6. The front flange portion 8c is fixed by welding to the door inner panel 3b, while the rear flange portion 8e is disposed opposite to the vertical wall surface 3b 'facing the vehicle rear side of the door inner panel 3b. It is not welded to 3b '.

前記延長プレート１０は、前記ベルトライン補強部材９の後端部９ｃに接続され、該ベルトライン補強部材９からの衝突荷重を前記ピラーレス補強部材６に伝達するための伝達部１０ａと、該伝達部１０ａの後端部に続いて上方向に延びる上延長部１０ｂと、下方に延びる下延長部１０ｂとを有し、側面視で大略Ｔ字形状をなしている。前記上延長部１０ｂは下延長部１０ｃより長く、具体的には略２倍の長さに設定されている。 The extension plate 10 is connected to the rear end portion 9c of the beltline reinforcing member 9, and transmits a collision load from the beltline reinforcing member 9 to the pillarless reinforcing member 6, and the transmitting portion. An upper extension 10b extending upward and a lower extension 10b extending downward following the rear end of 10a have a generally T shape in side view. The upper extension portion 10b is longer than the lower extension portion 10c, specifically, is set to be approximately twice as long.

前記伝達部１０ａはこれの後端部に続いて車幅方向外側に折り曲げ形成された後側縦壁面１０ｄを有し、前記上延長部１０ｂ，下延長部１０ｃも同様の縦壁面１０ｂ′，１０ｃ′を有する。これらの縦壁面１０ｄ，１０ｂ′，１０ｃ′は前記ピラー補強部材６の前側縦壁面６ｂに当接している。また前記上延長部１０ｂは前記縦壁部１０ｂ′に続いて前側に折り曲げられた前フランジ部１０ｅを有する。 The transmission portion 10a has a rear vertical wall surface 10d bent outward in the vehicle width direction following the rear end portion thereof, and the upper extension portion 10b and the lower extension portion 10c have the same vertical wall surfaces 10b 'and 10c. '. These vertical wall surfaces 10 d, 10 b ′, 10 c ′ are in contact with the front vertical wall surface 6 b of the pillar reinforcing member 6. The upper extension portion 10b has a front flange portion 10e that is bent to the front side following the vertical wall portion 10b '.

前記伝達部１０ａは前記ベルトライン部のドアインナパネル３ｂに溶接固定され、また前記上延長部１０ｂ，下延長部１０ｂは前記ピラー補強部材６の基部面６ａに溶接固定され、さらに前記上延長部１０ｂの前フランジ部１０ｅは前記ピラー補強部材６の前フランジ部６ｃに溶接固定されている。 The transmission portion 10a is welded and fixed to the door inner panel 3b of the belt line portion, and the upper extension portion 10b and the lower extension portion 10b are welded and fixed to the base surface 6a of the pillar reinforcing member 6, and the upper extension portion The front flange portion 10e of 10b is fixed to the front flange portion 6c of the pillar reinforcing member 6 by welding.

本実施例によれば、ピラーレス補強部材６に前側縦壁面６ｂを形成し、ベルトライン補強部材９の伝達部１０ａに後側縦壁面１０ｄを形成し、該両縦壁面６ｂ，１０ｄを当接させたので、車両正面衝突時の衝突荷重をベルトライン補強部材９から前記縦壁面６ｂ，１０ｄの広い当接面積を介してピラーレス補強部材６に確実に伝達でき、さらに上延長部１０ｂ，下延長部１０ｃにより上，下に確実に分散させることができる。   According to this embodiment, the front-side vertical wall surface 6b is formed on the pillarless reinforcing member 6, the rear-side vertical wall surface 10d is formed on the transmission portion 10a of the beltline reinforcing member 9, and both the vertical wall surfaces 6b and 10d are brought into contact with each other. Therefore, the collision load at the time of a vehicle frontal collision can be reliably transmitted from the beltline reinforcing member 9 to the pillarless reinforcing member 6 through the wide contact area of the vertical wall surfaces 6b and 10d, and the upper extension portion 10b and the lower extension portion. By 10c, it can be reliably dispersed upward and downward.

また前記上，下延長部１０ｂ，１０ｃにも前側の縦壁面１０ｂ′，１０ｃ′を形成し、これをピラーレス補強部材６の前側縦壁面６ｂに当接させたので、この点からも前記衝突荷重を確実にピラーレス補強部材６に伝達でき、かつ上下方向に分散させることができる。   Further, since the front vertical wall surfaces 10b 'and 10c' are also formed on the upper and lower extension portions 10b and 10c and are brought into contact with the front vertical wall surface 6b of the pillarless reinforcing member 6, the collision load is also considered from this point. Can be reliably transmitted to the pillarless reinforcing member 6 and can be dispersed in the vertical direction.

本実施例では、前記ピラーレス補強部材６を、これの断面係数が、前記ベルトライン補強部材６対向部より上側部分で小さく、下側部分で大きくなる断面形状に構成したので、断面係数が変化する前記対向部付近が側面衝突荷重に対する剛性上の断点となるが、本実施例では、前記ピラーレス補強部材６の前記対向部を延長プレート１０により補強しているので、前記側面衝突荷重に対する剛性上の断点となる問題を回避できる。 In this embodiment, the pillar-less reinforcing member 6 is configured to have a cross-sectional shape in which the section modulus is smaller at the upper portion than the beltline reinforcing member 6 facing portion and larger at the lower portion, and therefore the section modulus changes. In the present embodiment, the opposing portion of the pillarless reinforcing member 6 is reinforced by the extension plate 10, so that the vicinity of the opposing portion is a point of rigidity against the side impact load. It is possible to avoid the problem that becomes the break point.

また延長プレート１０により、ピラーレス補強部材６とベルトライン補強部材９との接続部を補強したので、フロントドア３自体の剛性を高めることができ、ドアの建て付け精度ひいてはドアの開閉性能を向上できる。   Further, since the connecting portion between the pillarless reinforcing member 6 and the beltline reinforcing member 9 is reinforced by the extension plate 10, the rigidity of the front door 3 itself can be increased, and the door installation accuracy and thus the door opening / closing performance can be improved. .

このように本実施例では、簡単な構造により、正面衝突時の衝突荷重をベルトライン補強部材９からピラーレス補強部材６に確実に伝達できると共に上，下に分散させることができ、また側面衝突時の荷重についてもピラーレス補強部材６に伝達，分散させることができ、側面衝突荷重専用部品を要しない分コスト，重量的にも有利である。 As described above, in this embodiment, with a simple structure, a collision load at the time of a frontal collision can be reliably transmitted from the beltline reinforcing member 9 to the pillarless reinforcing member 6 and can be dispersed upward and downward, and at the time of a side collision. This load can be transmitted and distributed to the pillarless reinforcing member 6, which is advantageous in terms of cost and weight because it does not require a side collision load dedicated component.

また、前記ピラーレス補強部材６を、前記ベルトライン補強部材９の対向部分より上側の断面係数が下側より小さくなるように構成するとともに、前記上延長部１０ｂを下延長部１０ｃより長く形成したので、側面衝突荷重に対する剛性上の断点となる問題を、コスト，重量増加を来すことなくより確実に回避できる。 In addition, the pillarless reinforcing member 6 is configured such that the section modulus above the opposite portion of the belt line reinforcing member 9 is smaller than the lower side, and the upper extension portion 10b is formed longer than the lower extension portion 10c. The problem that becomes the point of rigidity against the side collision load can be avoided more reliably without increasing the cost and weight.

なお、前記実施例では、延長プレート１０がベルトライン補強部材９と別体の場合を説明したが、例えばベルトライン補強部材を板金製とし、前記延長プレートをベルトライン補強部材と一体的に形成しても良い。   In the above embodiment, the case where the extension plate 10 is separate from the beltline reinforcing member 9 has been described. However, for example, the beltline reinforcing member is made of sheet metal, and the extension plate is formed integrally with the beltline reinforcing member. May be.

３ フロントドア
３ｂ ドアインナパネル
３ｆ ドアベルトライン部
６ ピラーレス補強部材
６ａ 基部面
６ｂ 前側縦壁面
９ ベルトライン補強部材
１０ 延長プレート（延設部）
１０ａ 伝達部
１０ｂ，１０ｃ 上延長部，下延長部
１０ｄ 後側縦壁面
Ａ 閉断面 3 Front door 3b Door inner panel 3f Door belt line part 6 Pillarless reinforcement member 6a Base surface 6b Front side vertical wall surface 9 Belt line reinforcement member 10 Extension plate (extension part)
10a Transmission part 10b, 10c Upper extension part, Lower extension part 10d Rear side vertical wall surface A Closed section

Claims (1)

フロントドアの後端部内に、ドア上下端近傍まで延びるピラーレス補強部材を配設し、該ピラーレス補強部材とドアインナパネルとで上下方向に延びる閉断面を形成し、ドアベルトライン部にベルトライン補強部材を配設したセンターピラーレス車両のフロントドア構造において、
前記ピラーレス補強部材の、少なくとも前記ベルトライン部近傍部分は、横断面平面視で、車幅方向外方を向いた基部面と、該基部面の前縁に続いて車幅方向内側に折り曲げられて車両前方を向いた前側縦壁面とを有し、
前記ベルトライン補強部材の後端部には、延設部が設けられ、
該延設部は、前記ベルトライン補強部材からの荷重を前記ピラーレス補強部材に伝達する伝達部と、該伝達部に続いて上，下方向に延びると共に前記ピラーレス補強部材に固定された上延長部及び下延長部とを有し、側面視で大略Ｔ字形状をなしており、
前記伝達部は、前記ピラーレス補強部材の前記前側縦壁面に当接する後側縦壁面を有し、前記上延長部は下延長部より長い
ことを特徴とするセンターピラーレス車両のフロントドア構造。 A pillarless reinforcing member extending to the vicinity of the upper and lower ends of the door is disposed in the rear end portion of the front door, and a closed section extending in the vertical direction is formed by the pillarless reinforcing member and the door inner panel. In the front door structure of the center pillarless vehicle in which the members are arranged,
At least a portion near the belt line portion of the pillarless reinforcing member is bent inward in the vehicle width direction following a base surface facing outward in the vehicle width direction and a front edge of the base surface in a cross-sectional plan view. A front vertical wall facing the front of the vehicle,
An extension portion is provided at a rear end portion of the beltline reinforcing member,
The extension portion includes a transmission portion that transmits a load from the beltline reinforcement member to the pillarless reinforcement member, and an upper extension portion that extends upward and downward following the transmission portion and is fixed to the pillarless reinforcement member. And a lower extension, and is generally T-shaped in side view,
The transmission unit is configured to have a side longitudinal wall surface after abutting the front vertical wall surface, the front door of the center pillar-less vehicle wherein the extension, characterized in longer <br/> that from the lower extension of the Piraresu reinforcing member Construction.
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US5232261A (en) * 1992-06-04 1993-08-03 Nhk Spring Co., Ltd. Door impact beam for an automobile
JPH07309137A (en) * 1994-05-18 1995-11-28 Nissan Motor Co Ltd Fitting structure of guard bar for automobile door
JPH0834238A (en) * 1994-07-22 1996-02-06 Hino Motors Ltd Automobile
JP4239283B2 (en) * 1999-03-30 2009-03-18 マツダ株式会社 Vehicle door structure
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JP2001026218A (en) * 1999-07-14 2001-01-30 Mazda Motor Corp Side door structure of vehicle
JP3672030B2 (en) * 2002-06-11 2005-07-13 ふそうエンジニアリング株式会社 Vehicle door
JP4013723B2 (en) * 2002-10-11 2007-11-28 マツダ株式会社 Shock absorbing structure for vehicle side door
JP4154996B2 (en) * 2002-10-28 2008-09-24 関東自動車工業株式会社 Front door belt line reinforcement structure for center pillarless vehicles
FR2917050B1 (en) * 2007-06-07 2009-09-04 Peugeot Citroen Automobiles Sa AUTOMOTIVE VEHICLE STRUCTURE PROVIDED WITH MEANS FOR DISTRIBUTING AND TRANSMITTING EFFORTS.

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