JP2014101055A - Reinforcement structure of vehicle back door - Google Patents

Reinforcement structure of vehicle back door Download PDF

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JP2014101055A
JP2014101055A JP2012254993A JP2012254993A JP2014101055A JP 2014101055 A JP2014101055 A JP 2014101055A JP 2012254993 A JP2012254993 A JP 2012254993A JP 2012254993 A JP2012254993 A JP 2012254993A JP 2014101055 A JP2014101055 A JP 2014101055A
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back door
vehicle
reinforcing
belt
thickness direction
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JP6004910B2 (en
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Junichiro Yamashita
純一郎 山下
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DaikyoNishikawa Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive back door whose rigidity is enhanced while suppressing its weight from increasing.SOLUTION: On an inner lower half part 19 of an inner member 5, a recessed line shape groove part 51 opened toward an outer lower member 13 side of an outer member 7 is formed along an outer peripheral edge part. To the recessed line shape groove part 51, a belt-like reinforcement member 53 which is thin and can deform easily toward a thickness direction is fitted in a state that a side surface of the belt shape reinforcement member 53 faces a groove side surface of the recessed line shape groove part 51 in a state that bending toward the thickness direction is regulated.

Description

この発明は、車両用バックドアの補強構造の改良に関する。   The present invention relates to an improvement in a reinforcing structure of a vehicle back door.

特許文献１には、樹脂製インナ部材及び樹脂製アウタ部材の各々の外周縁部を接着剤で接着してなる車両用バックドアが開示されている。このバックドアは、金属パイプからなる矩形環状の補強部材が上記インナ部材内面の外周縁部に沿って取り付けられて剛性を確保するようにしている。この補強部材には、ヒンジブラケット、ダンパブラケット及びロックブラケットが固設されていて、これらブラケットを介して補強部材がインナ部材に取り付けられている。   Patent Document 1 discloses a vehicle back door formed by bonding the outer peripheral edge of each of a resin inner member and a resin outer member with an adhesive. In this back door, a rectangular annular reinforcing member made of a metal pipe is attached along the outer peripheral edge of the inner surface of the inner member to ensure rigidity. A hinge bracket, a damper bracket, and a lock bracket are fixed to the reinforcing member, and the reinforcing member is attached to the inner member via these brackets.

特開２０１２−１０１７４０号公報（段落００１０欄〜段落００１２欄、図１、図２）JP 2012-101740 A (paragraph 0010 column to paragraph 0012 column, FIGS. 1 and 2)

しかし、上記の特許文献１では、補強部材が金属パイプであるため、重量の増加を招き、車体の軽量化を図る観点からは好ましくない。軽量でありながら剛性を確保できる術が望まれる。また、価格の高騰を抑えることも望まれる。   However, in Patent Document 1 described above, since the reinforcing member is a metal pipe, it is not preferable from the viewpoint of increasing the weight and reducing the weight of the vehicle body. A technique that can ensure rigidity while being lightweight is desired. It is also desirable to suppress price increases.

この発明は、かかる点に鑑みてなされたものであり、その目的とするところは、バックドアの重量の増加を抑えつつ剛性を高め、かつ安価なバックドアを提供することである。   The present invention has been made in view of this point, and an object of the present invention is to provide an inexpensive back door that increases rigidity while suppressing an increase in the weight of the back door.

上記の目的を達成するため、この発明は、金属パイプからなる補強部材に代えて薄肉の板状補強部材を採用し、インナ部材に対する取付け姿勢を工夫したことを特徴とする。   In order to achieve the above object, the present invention employs a thin plate-like reinforcing member instead of a reinforcing member made of a metal pipe, and is characterized in that the mounting posture with respect to the inner member is devised.

具体的には、この発明は、樹脂製インナ部材及び樹脂製アウタ部材の各々の外周縁部を接着剤で接着してなる車両用バックドアの補強構造を対象とし、次のような解決手段を講じた。   Specifically, the present invention is directed to a vehicle back door reinforcement structure in which the outer peripheral edge of each of the resin inner member and the resin outer member is bonded with an adhesive, and the following solution is provided. I took it.

すなわち、第１の発明は、上記インナ部材には、上記アウタ部材側に開口する凹条溝部が外周縁部に沿って設けられ、該凹条溝部には、厚み方向に変形容易な薄肉の帯状補強部材が厚み方向の撓みを規制された状態で側面を上記凹条溝部の溝側面に対面させて嵌入されていることを特徴とする。   That is, according to the first aspect of the present invention, the inner member is provided with a groove groove portion that opens to the outer member side along the outer peripheral edge portion, and the groove groove portion has a thin strip shape that is easily deformable in the thickness direction. The reinforcing member is fitted with the side surface facing the groove side surface of the concave groove portion in a state where the bending in the thickness direction is restricted.

第２の発明は、第１の発明において、上記インナ部材の車幅方向両側には、バックドア開閉用の開閉ダンパを取り付けるためのダンパ取付剛性部材が固定され、上記インナ部材の下端中央部には、バックドア閉状態保持用のロック装置のラッチを取り付けるためのラッチ取付剛性部材が固定され、上記帯状補強部材の長手方向上端は上記ダンパ取付剛性部材に、長手方向下端は上記ラッチ取付剛性部材にそれぞれ連結部材で連結されていることを特徴とする。   According to a second invention, in the first invention, a damper attachment rigid member for attaching an opening / closing damper for opening and closing the back door is fixed to both sides of the inner member in the vehicle width direction, and is arranged at a lower center portion of the inner member. The latch mounting rigid member for mounting the latch of the locking device for holding the back door closed state is fixed, the upper end in the longitudinal direction of the belt-shaped reinforcing member is the damper mounting rigid member, and the lower end in the longitudinal direction is the latch mounting rigid member Are connected by a connecting member.

第３の発明は、第２の発明において、上記帯状補強部材は、上記ダンパ取付剛性部材又はラッチ取付剛性部材の近傍で上記凹条溝部から外れて厚み方向の撓みを許容して長さ調整可能になっていることを特徴とする。   According to a third aspect, in the second aspect, the belt-shaped reinforcing member can be adjusted in length by allowing it to bend in the thickness direction by coming off the concave groove portion in the vicinity of the damper mounting rigid member or the latch mounting rigid member. It is characterized by becoming.

第４の発明は、第１〜３のいずれか１つの発明において、上記帯状補強部材は、上記インナ部材及びアウタ部材の各々の外周縁部を接着する接着剤で上記凹条溝部内に固定されていることを特徴とする。   According to a fourth aspect of the present invention, in any one of the first to third aspects, the belt-shaped reinforcing member is fixed in the concave groove portion with an adhesive that bonds the outer peripheral edge portions of the inner member and the outer member. It is characterized by.

第５の発明は、第１〜４のいずれか１つの発明において、上記凹条溝部の溝側面は、互いに角度が異なって連続する面を有し、上記帯状補強部材には、上記角度が異なって連続する面に沿うように厚み方向に２重に折り返された２重折返部が形成されていることを特徴とする。   A fifth invention is the invention according to any one of the first to fourth inventions, wherein the groove side surfaces of the concave groove portions have surfaces which are different in angle from each other and are continuous, and the band-shaped reinforcing member has a different angle. In addition, a double folded portion that is double folded in the thickness direction is formed along a continuous surface.

第１の発明によれば、補強部材が厚み方向に変形容易な薄肉の帯状であるため、特許文献１の如き金属パイプからなる補強部材に比べて軽量で、バックドアの重量が軽減される。   According to the first invention, since the reinforcing member is a thin strip shape that is easily deformable in the thickness direction, it is lighter than the reinforcing member made of a metal pipe as in Patent Document 1, and the weight of the back door is reduced.

しかも、帯状補強部材は、インナ部材の凹条溝部に厚み方向の撓みを規制された状態で側面を凹条溝部の溝側面に対面させて嵌入されているため、薄肉であってもバックドアの表面を強く押さえた時の荷重、及び衝突時の衝撃に十分に抗し得て強く、バックドアの変形、分断及び破断が防止され、軽量でかつ安価でありながら剛性大なるバックドアとなる。   In addition, since the belt-like reinforcing member is inserted into the concave groove portion of the inner member with the side surface facing the groove side surface of the concave groove portion in a state in which the bending in the thickness direction is restricted, The back door can be sufficiently resistant to the load when the surface is strongly pressed and the impact at the time of collision, and the back door is prevented from being deformed, divided and broken, and it is a lightweight and inexpensive back door with high rigidity.

第２の発明によれば、帯状補強部材の長手方向両端がダンパ取付剛性部材に、長手方向下端がラッチ取付剛性部材にそれぞれ連結されているため、衝突時におけるバックドアの半開放、分断及び飛散が確実に防止される。また、帯状補強部材は連結部材でダンパ取付剛性部材及びラッチ取付剛性部材に連結されるため、これら三者を別々にインナ部材に取り付けることができ、予めブラケットが固設された補強部材をインナ部材に組み付ける特許文献１に比べて取付け位置の調整が自在で組付け作業が容易になる。   According to the second aspect of the invention, the longitudinal ends of the belt-like reinforcing member are connected to the damper mounting rigid member and the lower end in the longitudinal direction is connected to the latch mounting rigid member. Is reliably prevented. Further, since the belt-like reinforcing member is connected to the damper mounting rigid member and the latch mounting rigid member by the connecting member, these three members can be separately attached to the inner member, and the reinforcing member having the bracket fixed in advance is used as the inner member. The mounting position can be adjusted freely and the assembling work can be facilitated as compared with Patent Document 1 which is assembled to the above.

第３の発明によれば、帯状補強部材とインナ部材との寸法誤差が吸収でき、帯状補強部材とダンパ取付剛性部材及びラッチ取付剛性部材との連結が容易になる。   According to the third invention, the dimensional error between the belt-like reinforcing member and the inner member can be absorbed, and the belt-like reinforcing member can be easily connected to the damper mounting rigid member and the latch mounting rigid member.

第４の発明によれば、帯状補強部材がインナ部材に強固に取り付けられ、衝突時におけるバックドアの分断及び破断が確実に防止される。   According to the fourth aspect of the invention, the belt-like reinforcing member is firmly attached to the inner member, so that the back door can be reliably prevented from being divided and broken during a collision.

第５の発明によれば、帯状補強部材の２重折返部の折り返し方を調整することで、車種により形状が異なるバックドアへの適用が自在になる。   According to the fifth aspect of the invention, by adjusting the folding method of the double folded portion of the belt-shaped reinforcing member, it can be freely applied to backdoors having different shapes depending on the vehicle type.

バックドアを車体後端に取り付ける前の斜視図である。It is a perspective view before attaching a back door to a vehicle body rear end. バックドアの分解斜視図である。It is a disassembled perspective view of a back door. 図３（ａ）は図１のＡ−Ａ線における断面図（図３（ｃ）のＡ’−Ａ’線に相当する断面図）、図３（ｂ）は図１のＢ−Ｂ線における断面図（図３（ｃ）のＢ’−Ｂ’線に相当する断面図）、図３（ｃ）は図３（ａ）及び図３（ｂ）の断面箇所を示す分解斜視図である。3A is a cross-sectional view taken along line AA in FIG. 1 (cross-sectional view corresponding to the line A′-A ′ in FIG. 3C), and FIG. 3B is taken along line BB in FIG. Sectional drawing (sectional drawing corresponding to the line B'-B 'of FIG.3 (c)), FIG.3 (c) is an exploded perspective view which shows the cross-sectional location of Fig.3 (a) and FIG.3 (b). ダンパー取付剛性部材と帯状補強部材との連結箇所を示す斜視図である。It is a perspective view which shows the connection location of a damper attachment rigid member and a strip | belt-shaped reinforcement member. 帯状補強部材の２重折返部を示し、図５（ａ）はその平面図、図５（ｂ）はその正面図である。The double folded part of a strip | belt-shaped reinforcement member is shown, Fig.5 (a) is the top view, FIG.5 (b) is the front view. ラッチ取付剛性部材と帯状補強部材との連結箇所を示す斜視図である。It is a perspective view which shows the connection location of a latch attachment rigid member and a strip | belt-shaped reinforcement member.

以下、この発明の実施形態について図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１及び図２は、この発明の実施形態に係る車両用バックドア１の補強構造を示す。このバックドア１は、ハッチバック車の車体３の後端開口部３ａを上下方向に開閉するためのものである。   FIG.1 and FIG.2 shows the reinforcement structure of the vehicle back door 1 which concerns on embodiment of this invention. The back door 1 is for opening and closing the rear end opening 3a of the vehicle body 3 of the hatchback vehicle in the vertical direction.

上記バックドア１は、樹脂製インナ部材５と、該インナ部材５に組み付けられるアウタ部材７とで構成されている。上記インナ部材５は、ＰＰ−ＧＦ（Polypropylene Glass Fiber）、ＰＰ−ＣＦ（Polypropylene Carbon Fiber）等の繊維補強材を含有する熱可塑性樹脂からなる。上記バックドア１は、これらインナ部材５及びアウタ部材７の各々の外周縁部を接着剤９で接着してなり、両者間に内部空間Ｓを有している（図３参照）。   The back door 1 includes a resin inner member 5 and an outer member 7 assembled to the inner member 5. The inner member 5 is made of a thermoplastic resin containing a fiber reinforcing material such as PP-GF (Polypropylene Glass Fiber) or PP-CF (Polypropylene Carbon Fiber). The back door 1 is formed by bonding the outer peripheral edges of the inner member 5 and the outer member 7 with an adhesive 9, and has an internal space S therebetween (see FIG. 3).

上記アウタ部材７は、樹脂製アウタアッパ部材１１と、樹脂製アウタロア部材１３と、これらアウタアッパ部材１１及びアウタロア部材１３に車体後方から接着剤（図示せず）で接合されるガラス製又は樹脂製の窓部材１５とで構成されている。上記アウタアッパ部材１１とアウタロア部材１３とは、タルク入りＰＰ（Polypropylene）等の熱可塑性樹脂からなる。上記アウタロア部材１３の略中央部には、ナンバープレート取付部１３ａが車体前方に向かって凹むように形成されている。   The outer member 7 includes a resin outer upper member 11, a resin outer lower member 13, and a glass or resin window joined to the outer upper member 11 and the outer lower member 13 with an adhesive (not shown) from the rear of the vehicle body. It is comprised with the member 15. FIG. The outer upper member 11 and the outer lower member 13 are made of a thermoplastic resin such as PP (Polypropylene) containing talc. A license plate mounting portion 13a is formed at a substantially central portion of the outer lower member 13 so as to be recessed toward the front of the vehicle body.

上記インナ部材５は、インナ上半部１７と、該インナ上半部１７に一体に連続するインナ下半部１９とで一体に構成されている。上記インナ上半部１７には、窓用開口部２１が上記窓部材１５に対応して形成されている。上記インナ下半部１９には、凹部２３が上記アウタロア部材１３のナンバープレート取付部１３ａに対応して形成されている。   The inner member 5 is integrally composed of an inner upper half 17 and an inner lower half 19 that is continuous with the inner upper half 17. A window opening 21 is formed in the inner upper half 17 corresponding to the window member 15. A concave portion 23 is formed in the inner lower half portion 19 corresponding to the number plate attaching portion 13a of the outer lower member 13.

上記インナ上半部１７上端縁部の車幅方向両端寄りには、ヒンジ取付孔２５が２個ずつ形成されている。上記インナ上半部１７の車幅方向両側下端には、ダンパ取付孔２７が２個ずつ形成されている。上記インナ上半部１７のヒンジ取付孔２５からダンパ取付孔２７にかけてリベット挿入孔２９が複数個形成されている。   Two hinge mounting holes 25 are formed near both ends in the vehicle width direction of the upper edge of the inner upper half 17. Two damper mounting holes 27 are formed at both lower ends of the inner upper half 17 in the vehicle width direction. A plurality of rivet insertion holes 29 are formed from the hinge mounting hole 25 to the damper mounting hole 27 of the inner upper half 17.

上記インナ上半部１７の幅方向両側には、バックドア１開閉用の開閉ダンパ３１を取り付けるための金属製の板材からなる略Ｌ字状のダンパ取付剛性部材３３が１個ずつ固定されている。図２において、３５は仮止め用のリベット挿入孔、３７はボルト挿入孔である。具体的には、上記インナ上半部１７の車幅方向両側にダンパ取付剛性部材３３を配置した状態で、リベット３９（図４参照）をリベット挿入孔２９，３５に挿入して仮止めし、ボルト４１（図４参照）をヒンジ取付孔２５、ダンパ取付孔２７及びボルト挿入孔３７に挿入して、ダンパ取付剛性部材３３がインナ上半部１７の車幅方向両側に固定される。この際、ダンパ取付剛性部材３３の上端は、ヒンジ４３がそのボルト挿入孔４３ａに上記ボルト４１を挿入することで取り付けられ、インナ部材５上端部が車体３に後端開口部３ａを上下方向に開閉可能にヒンジ４３で連結され、これにより、バックドア１がヒンジ４３を支点に上下方向に開閉するようになっている。また、上記ダンパ取付剛性部材３３の下端には、後述する帯状補強部材５３を連結するための連結孔４４ａを有する連結片４４が突設されている。なお、図２では、上記ダンパ取付剛性部材３３及びラッチ取付剛性部材４７は便宜上右側のもののみを表している。   A substantially L-shaped damper mounting rigid member 33 made of a metal plate for mounting the opening / closing damper 31 for opening / closing the back door 1 is fixed to each side of the inner upper half 17 in the width direction one by one. . In FIG. 2, 35 is a rivet insertion hole for temporary fixing, and 37 is a bolt insertion hole. Specifically, with the damper mounting rigid members 33 disposed on both sides of the inner upper half 17 in the vehicle width direction, the rivet 39 (see FIG. 4) is inserted into the rivet insertion holes 29 and 35 and temporarily fixed. Bolts 41 (see FIG. 4) are inserted into the hinge mounting holes 25, the damper mounting holes 27, and the bolt insertion holes 37, and the damper mounting rigid members 33 are fixed to both sides of the inner upper half 17 in the vehicle width direction. At this time, the upper end of the damper mounting rigid member 33 is attached by inserting the bolt 41 into the bolt insertion hole 43a of the hinge 43, and the upper end of the inner member 5 extends the rear end opening 3a vertically in the vehicle body 3. It is connected by a hinge 43 so that it can be opened and closed, whereby the back door 1 is opened and closed in the vertical direction with the hinge 43 as a fulcrum. Further, a connecting piece 44 having a connecting hole 44a for connecting a band-shaped reinforcing member 53 described later is projected from the lower end of the damper mounting rigid member 33. In FIG. 2, the damper mounting rigid member 33 and the latch mounting rigid member 47 are only shown on the right side for convenience.

上記車体３後端両側の上部寄りには、上記開閉ダンパ３１の上端が取り付けられるとともに、該開閉ダンパ３１の下端は、ダンパー取付部材４５を介して上記インナ上半部１７の車幅方向両側下端寄りに取り付けられている。具体的には、上記ダンパー取付部材４５にはボルト挿入孔４５ａが形成され、上記ダンパ取付剛性部材３３をインナ上半部１７の車幅方向両側に固定する際、上記ボルト４１（図４参照）をダンパ取付孔２７及びボルト挿入孔３７，４５ａに挿入することで開閉ダンパ３１の下端がインナ上半部１７の車幅方向両側下端に取り付けられる。   The upper end of the open / close damper 31 is attached to the upper side of both sides of the rear end of the vehicle body 3, and the lower end of the open / close damper 31 is connected to the lower ends of the inner upper half 17 via the damper mounting member 45 in the vehicle width direction. It is attached to the side. Specifically, a bolt insertion hole 45a is formed in the damper mounting member 45, and when the damper mounting rigid member 33 is fixed to both sides of the inner upper half 17 in the vehicle width direction, the bolt 41 (see FIG. 4). Is inserted into the damper mounting hole 27 and the bolt insertion holes 37, 45a so that the lower end of the open / close damper 31 is attached to the lower end on both sides of the inner upper half 17 in the vehicle width direction.

上記インナ部材５の下端寄り中央部、つまり上記インナ下半部１９の凹部２３下端には、バックドア１閉状態保持用のロック装置のラッチ（図示せず）を取り付けるためのラッチ取付剛性部材４７がリベット４８で固定されている。このラッチ取付剛性部材４７には、図６に示すように、後述する帯状補強部材５３を取り付けるための１個のネジ孔４７ａと、１個のリベット挿入孔４７ｂと、２個のラッチ取付け用のボルト孔４７ｃとが両側にそれぞれ形成されている。   A latch mounting rigid member 47 for mounting a latch (not shown) of a locking device for holding the back door 1 in the closed state is provided at the center near the lower end of the inner member 5, that is, at the lower end of the recess 23 of the inner lower half 19. Is fixed by a rivet 48. As shown in FIG. 6, the latch attachment rigid member 47 has one screw hole 47a for attaching a belt-like reinforcing member 53 to be described later, one rivet insertion hole 47b, and two latch attachment members. Bolt holes 47c are formed on both sides.

上記インナ部材５のインナ下半部１９外周縁部内寄りには、図３、図４及び図６に示すように、長尺のリブ４９が複数個の補強片部４９ａで補強されて一体に形成され、該リブ４９とインナ下半部１９外周縁部との間には、上記アウタ部材７のアウタロア部材１３側に開口する凹条溝部５１がインナ下半部１９外周縁部に沿って形成されている。   As shown in FIGS. 3, 4, and 6, a long rib 49 is reinforced by a plurality of reinforcing pieces 49a and formed integrally with the inner peripheral edge of the inner lower half 19 of the inner member 5 as shown in FIGS. In addition, a groove 51 that opens to the outer lower member 13 side of the outer member 7 is formed along the outer peripheral edge of the inner lower half 19 between the rib 49 and the outer peripheral edge of the inner lower half 19. ing.

該凹条溝部５１には、厚み方向に変形容易な薄肉の帯状補強部材５３が厚み方向の撓みを規制された状態で側面を上記凹条溝部５１の溝側面に対面させて嵌入されている。この帯状補強部材５３は、本例で厚み０．６ｍｍ、幅８〜１０ｍｍの鉄板からなるが、アルミニウム、ガラスネット及びカーボンネット等で形成されていてもよく、厚み及び幅は素材により適宜決定すればよい。   A thin belt-like reinforcing member 53 that is easily deformable in the thickness direction is fitted into the concave groove portion 51 so that the side surface faces the groove side surface of the concave groove portion 51 in a state where bending in the thickness direction is restricted. The band-shaped reinforcing member 53 is formed of an iron plate having a thickness of 0.6 mm and a width of 8 to 10 mm in this example, but may be formed of aluminum, a glass net, a carbon net, or the like, and the thickness and width are appropriately determined depending on the material. That's fine.

上記インナ下半部１９の外周縁部には、図３（ｃ）に示すように、上記凹条溝部５１に連続する凹部５５が長手方向に間隔をあけて複数個形成されている。当該凹部５５には、図３（ａ）及び図３（ｂ）に示すように、上記インナ部材５及びアウタ部材７の各々の外周縁部を接着する上記接着剤９が充填され、上記帯状補強部材５３が上記接着剤９で上記凹条溝部５１内に固定されている。   As shown in FIG. 3C, a plurality of concave portions 55 that are continuous with the concave groove portions 51 are formed at intervals in the longitudinal direction on the outer peripheral edge portion of the inner lower half portion 19. As shown in FIGS. 3A and 3B, the concave portion 55 is filled with the adhesive 9 that bonds the outer peripheral edge portions of the inner member 5 and the outer member 7, and the band-shaped reinforcement is provided. A member 53 is fixed in the groove 51 by the adhesive 9.

上記帯状補強部材５３の長手方向上端及び長手方向下端には、連結孔５３ａがそれぞれ形成され、帯状補強部材５３の長手方向上端は、連結部材としてのリベット５７をダンパ取付剛性部材３３の連結片４４の連結孔４４ａ、帯状補強部材５３の連結孔５３ａ、及びインナ下半部１９のリベット挿入孔２９に挿入することで上記ダンパ取付剛性部材３３にリベット５７で連結されている（図４参照）。   A connecting hole 53a is formed at each of the upper end and the lower end in the longitudinal direction of the belt-like reinforcing member 53, and the upper end in the longitudinal direction of the belt-like reinforcing member 53 is a connecting piece 44 of the damper mounting rigid member 33. Are connected to the damper mounting rigid member 33 with a rivet 57 (see FIG. 4) by being inserted into the connecting hole 44a, the connecting hole 53a of the belt-like reinforcing member 53, and the rivet insertion hole 29 of the inner lower half portion 19.

一方、帯状補強部材５３の長手方向下端は、連結部材としてのネジ５９を帯状補強部材５３の連結孔５３ａ、及びラッチ取付剛性部材４７のネジ孔４７ａに挿入して上記ラッチ取付剛性部材４７にネジ５９で連結されている。この際、上記帯状補強部材５３は、上記ラッチ取付剛性部材４７の近傍で上記凹条溝部５１から外れて厚み方向の撓みを許容して長さ調整可能になっている（図６参照）。   On the other hand, at the lower end in the longitudinal direction of the belt-like reinforcing member 53, a screw 59 as a connecting member is inserted into the connecting hole 53 a of the belt-like reinforcing member 53 and the screw hole 47 a of the latch mounting rigid member 47. 59. At this time, the belt-like reinforcing member 53 is disengaged from the concave groove 51 in the vicinity of the latch mounting rigid member 47 and is allowed to be adjusted in length by allowing bending in the thickness direction (see FIG. 6).

上記インナ部材５のインナ上半部１７とインナ下半部１９との境目の外周縁部は、互いに角度が異なって連続する面を有する。したがって、当該箇所に対応する上記凹条溝部５１の溝側面は、互いに角度が異なって連続する面を有し、上記帯状補強部材５３には、図５（ａ）及び図５（ｂ）に示すように、上記角度が異なって連続する面に沿うように厚み方向に２重に折り返された２重折返部６１が形成されている。   The outer peripheral edge of the boundary between the inner upper half 17 and the inner lower half 19 of the inner member 5 has a continuous surface with different angles. Therefore, the groove side surface of the concave groove 51 corresponding to the portion has a continuous surface with different angles, and the belt-like reinforcing member 53 is shown in FIGS. 5 (a) and 5 (b). As described above, a double folded portion 61 is formed that is folded twice in the thickness direction so as to follow a continuous surface with different angles.

したがって、この実施形態では、インナ部材５のインナ下半部１９に形成した凹条溝部５１に、薄肉の帯状補強部材５３を厚み方向の撓みが規制された状態で側面を上記凹条溝部５１の溝側面に対面させて嵌入させたので、特許文献１の如き金属パイプからなる補強部材に比べて軽量で、バックドア１の重量を軽減することができるとともに、薄肉であってもバックドア１の表面を強く押さえた時の荷重、及び衝突時の衝撃に十分に抗し得て強く、バックドア１の変形、分断及び破断を防止でき、軽量でかつ安価でありながら剛性大なるバックドア１とすることができる。   Therefore, in this embodiment, the thin strip-shaped reinforcing member 53 is formed on the concave groove portion 51 formed in the inner lower half portion 19 of the inner member 5 with the side surface of the concave groove portion 51 in a state where the bending in the thickness direction is restricted. Since it was made to face and fit into the groove side surface, it is lighter than the reinforcing member made of metal pipe as in Patent Document 1, and the weight of the back door 1 can be reduced. The back door 1 that can sufficiently resist the load when the surface is strongly pressed and the impact at the time of collision, is strong, can prevent the back door 1 from being deformed, divided and broken, is lightweight and inexpensive, and has high rigidity. can do.

また、この実施形態では、帯状補強部材５３の長手方向上端をリベット５７でダンパ取付剛性部材３３に連結するとともに、帯状補強部材５３の長手方向下端をネジ５９でラッチ取付剛性部材４７に連結したので、衝突時におけるバックドア１の半開放、分断及び飛散を確実に防止できる。さらには、ダンパ取付剛性部材３３、ラッチ取付剛性部材４７及び帯状補強部材５３の三者を別々にインナ部材５に取り付けることで、予めブラケットが固設された補強部材をインナ部材に組み付ける特許文献１に比べて自在に取付け位置の調整が可能で組付け作業を容易に行うことができる。   In this embodiment, the upper end in the longitudinal direction of the strip-shaped reinforcing member 53 is connected to the damper mounting rigid member 33 by the rivet 57 and the lower end in the longitudinal direction of the strip-shaped reinforcing member 53 is connected to the latch mounting rigid member 47 by the screw 59. The back door 1 can be prevented from being partially opened, divided and scattered at the time of collision. Furthermore, by attaching the three members of the damper mounting rigid member 33, the latch mounting rigid member 47, and the belt-shaped reinforcing member 53 to the inner member 5 separately, Patent Document 1 for assembling the reinforcing member with the bracket fixed in advance to the inner member. Compared to the above, the mounting position can be freely adjusted and the assembling work can be easily performed.

さらに、この実施形態では、帯状補強部材５３を、ラッチ取付剛性部材４７の近傍で凹条溝部５１から外して厚み方向の撓みを許容して長さ調整可能にしているので、帯状補強部材５３とインナ部材５との寸法誤差を吸収でき、帯状補強部材５３とダンパ取付剛性部材３３及びラッチ取付剛性部材４７との連結を容易に行うことができる。   Furthermore, in this embodiment, since the strip-shaped reinforcing member 53 is removed from the concave groove portion 51 in the vicinity of the latch mounting rigid member 47 and allowed to be bent in the thickness direction, the length of the strip-shaped reinforcing member 53 can be adjusted. A dimensional error with the inner member 5 can be absorbed, and the band-shaped reinforcing member 53, the damper mounting rigid member 33, and the latch mounting rigid member 47 can be easily connected.

さらにまた、この実施形態では、帯状補強部材５３を、インナ部材５及びアウタ部材７の各々の外周縁部を接着する接着剤９で凹条溝部５１内に固定したので、帯状補強部材５３のインナ部材５（インナ下半部１９）に対する取付けが強固になり、衝突時におけるバックドア１の分断及び破断を確実に防止できる。   Furthermore, in this embodiment, the belt-like reinforcing member 53 is fixed in the groove 51 by the adhesive 9 that bonds the outer peripheral edge portions of the inner member 5 and the outer member 7. The attachment to the member 5 (the inner lower half portion 19) is strengthened, and the back door 1 can be reliably prevented from being divided and broken during a collision.

加えて、この実施形態では、帯状補強部材５３に２重折返部６３を形成し、該２重折返部６３を凹条溝部５１の溝側面の互いに角度が異なって連続する面に沿わせたので、２重折返部６３の折り返し方を調整することで、車種により形状が異なるバックドア１に自在に適用できる。   In addition, in this embodiment, the double folded portion 63 is formed in the belt-like reinforcing member 53, and the double folded portion 63 is arranged along continuous surfaces of the groove side surfaces of the groove groove portion 51 at different angles. By adjusting the folding method of the double folding part 63, it can be freely applied to the back door 1 having a different shape depending on the vehicle type.

なお、上記実施形態では、帯状補強部材５３は、ラッチ取付剛性部材４７の近傍で凹条溝部５１から外れて厚み方向の撓みを許容して長さ調整可能になっているが、これとは逆に、帯状補強部材５３は、上記ダンパ取付剛性部材３３の近傍で上記凹条溝部５１から外れて厚み方向の撓みを許容して長さ調整可能になっていてもよい。   In the above-described embodiment, the belt-like reinforcing member 53 can be adjusted in length by allowing it to bend in the thickness direction by being detached from the groove 51 in the vicinity of the latch mounting rigid member 47, but this is not the case. In addition, the belt-like reinforcing member 53 may be adjusted in length by allowing it to bend from the concave groove 51 in the vicinity of the damper mounting rigid member 33 and allowing bending in the thickness direction.

また、上記実施形態では、帯状補強部材５３をインナ下半部１９の車幅方向両側に設けたが、片側にロック装置作動用のハーネスが引き回されている場合には、当該箇所には帯状補強部材５３を設けなくてもよく、さらには、帯状補強部材５３を全周に配置してダンパ取付剛性部材３３の代わりにしてもよい。   Moreover, in the said embodiment, although the strip | belt-shaped reinforcement member 53 was provided in the vehicle width direction both sides of the inner lower half part 19, when the harness for a locking device action | operation is drawn around on one side, a strip | belt-shaped is included in the said location. The reinforcing member 53 may not be provided, and further, the belt-like reinforcing member 53 may be arranged around the entire circumference to replace the damper mounting rigid member 33.

この発明は、車両用バックドアの補強構造について有用である。   The present invention is useful for a reinforcing structure of a vehicle back door.

１ バックドア
５ インナ部材
７ アウタ部材
９ 接着剤
３１ 開閉ダンパ
３３ ダンパ取付剛性部材
４７ ラッチ取付剛性部材
５１ 凹条溝部
５３ 帯状補強部材
５７ リベット（連結部材）
５９ ネジ（連結部材）
６１ ２重折返部 DESCRIPTION OF SYMBOLS 1 Back door 5 Inner member 7 Outer member 9 Adhesive 31 Opening / closing damper 33 Damper attachment rigid member 47 Latch attachment rigid member 51 Concave groove part 53 Strip | belt-shaped reinforcement member 57 Rivet (connection member)
59 Screw (connection member)
61 Double folding section

Claims (5)

樹脂製インナ部材(5)及び樹脂製アウタ部材(7)の各々の外周縁部を接着剤(9)で接着してなる車両用バックドアの補強構造であって、
上記インナ部材(5)には、上記アウタ部材(7)側に開口する凹条溝部(51)が外周縁部に沿って設けられ、
該凹条溝部(51)には、厚み方向に変形容易な薄肉の帯状補強部材(53)が厚み方向の撓みを規制された状態で側面を上記凹条溝部(51)の溝側面に対面させて嵌入されていることを特徴とする車両用バックドアの補強構造。 A reinforcing structure for a vehicle back door formed by bonding the outer peripheral edge of each of the resin inner member (5) and the resin outer member (7) with an adhesive (9),
The inner member (5) is provided with a concave groove portion (51) that opens to the outer member (7) side along the outer peripheral edge portion,
The concave groove portion (51) has a thin strip-shaped reinforcing member (53) that is easily deformable in the thickness direction with the side surface facing the groove side surface of the concave groove portion (51) in a state where the bending in the thickness direction is restricted. A reinforcing structure for a back door for a vehicle, characterized by being inserted. 請求項１に記載の車両用バックドアの補強構造において、
上記インナ部材(5)の車幅方向両側には、バックドア(1)開閉用の開閉ダンパ(31)を取り付けるためのダンパ取付剛性部材(33)が固定され、
上記インナ部材(5)の下端中央部には、バックドア(1)閉状態保持用のロック装置のラッチを取り付けるためのラッチ取付剛性部材(47)が固定され、
上記帯状補強部材(53)の長手方向上端は上記ダンパ取付剛性部材(33)に、長手方向下端は上記ラッチ取付剛性部材(47)にそれぞれ連結部材(57,59)で連結されていることを特徴とする車両用バックドアの補強構造。 The reinforcing structure for a vehicle back door according to claim 1,
On both sides of the inner member (5) in the vehicle width direction, damper mounting rigid members (33) for mounting the opening / closing damper (31) for opening and closing the back door (1) are fixed,
A latch mounting rigid member (47) for mounting a latch of the locking device for holding the back door (1) in the closed state is fixed to the center of the lower end of the inner member (5),
The upper end in the longitudinal direction of the strip-shaped reinforcing member (53) is connected to the damper mounting rigid member (33), and the lower end in the longitudinal direction is connected to the latch mounting rigid member (47) by connecting members (57, 59). Reinforced structure for vehicle back doors. 請求項２に記載の車両用バックドアの補強構造において、
上記帯状補強部材(53)は、上記ダンパ取付剛性部材(33)又はラッチ取付剛性部材(47)の近傍で上記凹条溝部(51)から外れて厚み方向の撓みを許容して長さ調整可能になっていることを特徴とする車両用バックドアの補強構造。 The reinforcing structure of the vehicle back door according to claim 2,
The band-shaped reinforcing member (53) can be adjusted in length by allowing it to bend in the thickness direction by coming off the concave groove (51) in the vicinity of the damper mounting rigid member (33) or the latch mounting rigid member (47). A reinforcing structure for a back door for a vehicle, characterized in that 請求項１〜３のいずれか１項に記載の車両用バックドアの補強構造において、
上記帯状補強部材(53)は、上記インナ部材(5)及びアウタ部材(7)の各々の外周縁部を接着する接着剤(9)で上記凹条溝部(51)内に固定されていることを特徴とする車両用バックドアの補強構造。 In the reinforcement structure of the back door for vehicles given in any 1 paragraph of Claims 1-3,
The belt-like reinforcing member (53) is fixed in the groove (51) with an adhesive (9) that bonds the outer peripheral edge of each of the inner member (5) and the outer member (7). A vehicle back door reinforcing structure characterized by the above. 請求項１〜４のいずれか１項に記載の車両用バックドアの補強構造において、
上記凹条溝部(51)の溝側面は、互いに角度が異なって連続する面を有し、
上記帯状補強部材(53)には、上記角度が異なって連続する面に沿うように厚み方向に２重に折り返された２重折返部(61)が形成されていることを特徴とする車両用バックドアの補強構造。 In the reinforcement structure of the back door for vehicles given in any 1 paragraph of Claims 1-4,
The groove side surface of the groove portion (51) has a continuous surface with different angles from each other,
The belt-like reinforcing member (53) is formed with a double folded portion (61) that is folded twice in the thickness direction so as to follow a continuous surface with different angles. Backdoor reinforcement structure.
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