JP2018012500A - Reinforcement structure of resin back door - Google Patents

Reinforcement structure of resin back door Download PDF

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JP2018012500A
JP2018012500A JP2017207966A JP2017207966A JP2018012500A JP 2018012500 A JP2018012500 A JP 2018012500A JP 2017207966 A JP2017207966 A JP 2017207966A JP 2017207966 A JP2017207966 A JP 2017207966A JP 2018012500 A JP2018012500 A JP 2018012500A
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back door
pair
portions
vehicle
lock mechanism
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JP6495416B2 (en
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淳 本橋
Atsushi Motohashi
淳 本橋
山田　泰
Yasushi Yamada
泰 山田
紳一郎 岩井
Shinichiro Iwai
紳一郎 岩井
伊藤　慎
Shin Ito
慎 伊藤
公平 町谷
Kohei Machitani
公平 町谷
定行 清水
Sadayuki Shimizu
定行 清水
直也 池田
Naoya Ikeda
直也 池田
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement structure of a resin back door which has improved rigidity without leading to an increase in the number of parts.SOLUTION: A reinforcement structure has a back door inner panel 100 which includes a back door upper portion 110 provided with a pair of hinge mounting portions 111 and 112, a back door skirt portion 130 provided with a lock mechanism mounting portion 131, and a pair of back door side portions 121 and 122 opened toward a vehicle rear part, where the back door skirt portion 130 has a pair of connection portions 151 and 152 opened toward the vehicle rear part, the back door skirt portion is formed with a pair of beads 221 and 222 extending obliquely upward from both of right and left sides of the lock mechanism mounting portion 131 and includes the pair of back door side portions 121 and 122, the pair of connection portions 151 and 152 and the pair of beads 221 and 222, and thereby a pair of continuous right and left skeletal structures are formed from the pair of hinge mounting portions 111 and 112 to the lock mechanism mounting portion 131.SELECTED DRAWING: Figure 1

Description

本発明は、樹脂製バックドアの補強構造に関する。   The present invention relates to a reinforcing structure for a resin back door.

近年、車両の軽量化を目的として、バックドアを樹脂製とする場合がある。樹脂製のバックドアは、板金製のバックドアと同様、車体後部開口の上縁に沿って車幅方向に延びるバックドア上部と、バックドア上部の両端から車体後部開口の左右側縁に沿って上下方向に延びる左右一対のバックドア側部と、これら左右一対のバックドア側部の下方につながり、車体後部開口の下方を閉じるバックドア裾部とを有する。バックドア上部と、左右一対のバックドア側部と、バックドア裾部の上縁で囲まれた部分には、ガラスが設けられ、リアウインドを形成する。   In recent years, the back door may be made of resin for the purpose of reducing the weight of the vehicle. The back door made of resin, like the back door made of sheet metal, extends along the upper edge of the vehicle body rearward opening along the upper edge of the rear opening of the vehicle body, along the left and right side edges of the rear opening of the vehicle body from both ends of the upper portion of the back door. A pair of left and right back door sides that extend in the vertical direction and a back door skirt that is connected to the lower side of the pair of left and right back doors and closes the lower part of the rear opening of the vehicle body. Glass is provided in a portion surrounded by the upper edge of the back door, the pair of left and right back doors, and the upper edge of the back door hem, thereby forming a rear window.

バックドアを樹脂製とする場合、その剛性確保に留意する必要がある。バックドアの剛性確保が不十分であると、共振周波数が低くなり、路面からの振動やＣＶＴ（連続可変トランスミッション）の周波数と共振を起こし、不快なこもり音が発生するという問題が起ることがある。   When the back door is made of resin, it is necessary to pay attention to ensuring its rigidity. If the back door is not sufficiently rigid, the resonance frequency will be low, causing vibrations from the road surface and resonance with the CVT (continuously variable transmission) frequency, which may cause unpleasant noise. is there.

バックドアは、バックドア上部が左右一対のヒンジを介して車体に揺動可能に連結され、バックドア裾部の下部中央がロック機構を介して車体に連携される。すなわち、バックドアは、閉じられた状態において、上部における左右一対のヒンジと、下部におけるロック機構との、３点において車体に単純支持されていると考えることができる。   The upper part of the back door is pivotably connected to the vehicle body via a pair of left and right hinges, and the lower center of the back door hem is linked to the vehicle body via a lock mechanism. That is, it can be considered that the back door is simply supported by the vehicle body at three points: a pair of left and right hinges at the upper part and a lock mechanism at the lower part in the closed state.

ところで、バックドアにおいて、これを上下方向に沿った曲げの力が作用した場合、上部のヒンジと下部のロック機構の双方から最も遠い、左右一対のバックドア側部と、バックドア裾部との連結部付近に応力が集中すると考えられ、バックドア全体の剛性を上げるためには、左右一対のバックドア側部と、バックドア裾部との連結部付近の剛性を上げることが効果的に寄与することが判る。   By the way, in the back door, when a bending force is applied along the vertical direction, the pair of left and right back door side parts farthest from both the upper hinge and the lower locking mechanism, and the back door hem part. In order to increase the rigidity of the back door as a whole, it is considered that stress is concentrated near the connecting part. To increase the rigidity of the entire back door, increasing the rigidity of the connecting part between the pair of left and right back door sides and the back door hem part effectively contributes. I know that

特許文献１には、バックドアインナとバックドアアウタとの間に、左右一対のバックドア側部からバックドア裾部まで延びる比較的大型のリインホースメントを内蔵させるという手法を採用することにより、左右一対のバックドア側部からバックドア裾部にかけての領域の剛性を向上させている。   In Patent Document 1, by adopting a method of incorporating a relatively large reinforcement extending from a pair of left and right back door sides to a back door hem between the back door inner and the back door outer, The rigidity of the region from the pair of left and right back door sides to the back door hem is improved.

しかしながら、かかる大型のリインホースメントを採用して樹脂製バックドアの剛性向上を図るという手法には、バックドアの部品点数と組立工数の増加という問題が残存する。   However, the method of adopting such a large reinforcement and improving the rigidity of the resin back door still has the problem of increasing the number of parts and the number of assembly steps of the back door.

特開２０１１−１９４９４７号公報JP 2011-194947 A

本発明は、上述した事情のもとで考え出されたものであって、部品点数の増加や組立工数の増加を招くことなく、効果的に剛性を向上させた樹脂製バックドアの補強構造を提供することをその課題とする。   The present invention has been conceived under the circumstances described above, and has a resin back door reinforcement structure that effectively improves rigidity without increasing the number of parts or the number of assembly steps. The issue is to provide.

上述の課題を解決するため、本発明では、次の技術的手段を採用した。   In order to solve the above problems, the present invention employs the following technical means.

本発明によって提供される樹脂製バックドアの補強構造は、ウインドガラスが設けられるウインド部と、前記ウインド部よりも車両上方に位置し、かつ車幅方向に延びるとともに、左右一対のヒンジ取付け部が設けられたバックドア上部と、前記ウインド部よりも車両下方に位置し、かつロック機構取付け部が下部中央に設けられたバックドア裾部と、前記ウインド部の左右両側に位置し、かつ車両上下方向に延びるとともに、前記バックドア上部と前記バックドア裾部とを連結する一対のバックドア側部と、を備えるバックドアインナパネルを有する樹脂製バックドアの補強構造であって、前記バックドア側部は、その横断面形状が車両後方に向けて開口したコ字状であり、前記バックドア裾部は、その上端の左右両側に位置し、かつ一対の前記バックドア側部の下端がつながるとともに、横断面形状が車両後方に向けて開口したコ字状である一対の連結部を有し、前記バックドア裾部には、前記ロック機構取付け部の左右両側から斜め上方に延びて一対の前記連結部に至る一対のビードが形成され、一対の前記バックドア側部と、一対の前記連結部と、一対の前記ビードと、を含むことにより、一対の前記ヒンジ取付け部から前記ロック機構取付け部までに至る間において連続した左右一対の骨格構造が構成されていることを特徴としている。   The resin back door reinforcing structure provided by the present invention includes a window portion on which a window glass is provided, a vehicle upper position than the window portion and extending in the vehicle width direction, and a pair of left and right hinge mounting portions. The upper part of the provided back door, the back part of the back door that is located below the window part and the lock mechanism mounting part is provided at the center of the lower part, the right and left sides of the window part, and the upper and lower parts of the vehicle A resin back door reinforcing structure having a back door inner panel that extends in a direction and includes a pair of back door side portions that connect the back door upper portion and the back door skirt portion, and the back door side The cross-sectional shape is a U-shape whose cross-sectional shape is open toward the rear of the vehicle, and the back door hem is located on both the left and right sides of the upper end, and The back door side portion is connected to the lower end, and has a pair of connecting portions having a U-shaped cross section that opens toward the rear of the vehicle. A pair of beads extending obliquely upward from both sides and reaching the pair of connecting portions are formed, and include a pair of back door side portions, a pair of the connecting portions, and a pair of the beads. A pair of left and right skeletal structures that are continuous from the hinge mounting portion to the lock mechanism mounting portion are configured.

上述の構成のバックドアの補強構造によれば、バックドアインナパネルにおいて、一対のバックドア側部と、一対の連結部と、一対のビードを含む、左右一対の骨格構造が構成されている。当該骨格構造は、バックドア上部に設けられた一対のヒンジ取付け部からバックドア裾部に設けられたロック機構取付け部までに至る間において、連続した構造となっている。当該骨格構造は、その形状によりバックドアインナパネルにおいて比較的剛性が高い部分に該当する。   According to the back door reinforcing structure having the above-described configuration, in the back door inner panel, a pair of left and right skeleton structures including a pair of back door side portions, a pair of connecting portions, and a pair of beads are configured. The skeleton structure is a continuous structure from the pair of hinge mounting portions provided at the upper portion of the back door to the lock mechanism mounting portion provided at the back door hem portion. The skeleton structure corresponds to a portion having relatively high rigidity in the back door inner panel due to its shape.

また、バックドアの開閉においてロック機構取付け部に作用する反力が当該骨格構造を通じて一対のヒンジ取付け部に伝達され、さらにその反力はドアヒンジを介して車体に伝達される。このため、当該骨格構造によって、バックドア裾部に作用する反力の集中が低減し、バックドア裾部の変形を抑制することができる。   In addition, a reaction force acting on the lock mechanism attachment portion when the back door is opened and closed is transmitted to the pair of hinge attachment portions through the skeleton structure, and the reaction force is transmitted to the vehicle body via the door hinge. For this reason, by the said skeleton structure, concentration of the reaction force which acts on a back door skirt part reduces, and a deformation | transformation of a back door skirt part can be suppressed.

これにより、別途のリインホースメントを要せずして、樹脂製バックドアの剛性を効果的に高めることができ、バックドア全体の共振周波数を高め、路面からの振動やＣＶＴによる振動に起因したこもり音の発生を極力抑制することができる。   As a result, the rigidity of the resin back door can be effectively increased without requiring a separate reinforcement, and the resonance frequency of the entire back door is increased, resulting from vibration from the road surface or vibration due to CVT. Generation of a booming noise can be suppressed as much as possible.

本発明のその他の特徴および利点は、添付図面に基づき以下に行う詳細な説明によって、より明らかとなろう。   Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

本発明の一実施形態にかかるバックドアインナパネルを後方側から見た斜視図である。It is the perspective view which looked at the back door inner panel concerning one Embodiment of this invention from the back side. 図１のＩＩ−ＩＩ線に沿う拡大断面図である。It is an expanded sectional view which follows the II-II line of FIG. 図１に示すバックドアインナパネルを前方側（車室側）から見た斜視図である。It is the perspective view which looked at the back door inner panel shown in FIG. 1 from the front side (vehicle compartment side).

以下、本発明の好ましい実施形態について、図面を参照して具体的に説明する。   Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

図１〜図３は、本発明の一実施形態にかかるバックドアＡを示し、図１は、バックドアインナパネル１００を後方側から見た斜視図、図２は、図１のＩＩ−ＩＩ線に沿う断面図、図３は、図１に示すバックドアインナパネル１００を前方側（車室側）から見た斜視図である。   1 to 3 show a back door A according to an embodiment of the present invention, FIG. 1 is a perspective view of the back door inner panel 100 viewed from the rear side, and FIG. 2 is a line II-II in FIG. FIG. 3 is a perspective view of the back door inner panel 100 shown in FIG. 1 viewed from the front side (vehicle compartment side).

バックドアインナパネル１００とバックドアアウタパネル（図示略）とにより、これらを合わせるようにして、バックドアＡが形成される。図１および図３に示されるバックドアインナパネル１００は、全体が樹脂成形によって形成されている。   The back door A is formed by combining the back door inner panel 100 and the back door outer panel (not shown). The back door inner panel 100 shown in FIGS. 1 and 3 is entirely formed by resin molding.

バックドアインナパネル１００は、車体の後部開口の上縁に沿って車幅方向に延びるバックドア上部１１０と、バックドア上部１１０の左右両端から車体後部開口の左右側縁に沿って上下方向に延びるバックドア左側部１２１およびバックドア右側部１２２と、これらバックドア左側部１２１およびバックドア右側部１２２の下方につながり、車体後部開口の下方を閉じるバックドア裾部１３０と、を有する。バックドア上部１１０と、バックドア左側部１２１と、バックドア右側部１２２と、バックドア裾部１３０の上縁とで囲まれる領域は、ウインド部１４０を形成し、バックドアＡが構成されたときにこの領域には、ウインドガラス（図示略）が設けられる。   The back door inner panel 100 extends in the vehicle width direction along the upper edge of the rear opening of the vehicle body, and extends in the vertical direction from the left and right ends of the back door upper portion 110 along the left and right side edges of the vehicle body rear opening. It has a back door left side 121 and a back door right side 122, and a back door skirt 130 that is connected to the lower side of the back door left side 121 and the back door right side 122 and closes the lower side of the rear opening of the vehicle body. When the back door upper part 110, the back door left part 121, the back door right part 122, and the area surrounded by the upper edge of the back door skirt part 130 form the window part 140 and the back door A is configured. In addition, window glass (not shown) is provided in this region.

バックドア上部１１０には、左右一対のヒンジ取付け部１１１，１１２が設けられている。バックドアＡは、このヒンジ取付け部１１１，１１２に取付けられたヒンジ（図示略）を介して車体の後部開口の上部に対してはね上げ開閉可能に連結される。   The back door upper part 110 is provided with a pair of left and right hinge attachment parts 111 and 112. The back door A is connected to the upper part of the rear opening of the vehicle body through hinges (not shown) attached to the hinge attaching portions 111 and 112 so as to be opened and closed.

バックドア裾部１３０の下部中央には、ロック機構取付け部１３１が設けられている。バックドアＡは、このロック機構取付け部１３１に取付けられたロック機構（図示略）が車体後部開口の下縁に設けられるストライカ（図示略）に係合して車体に連携され、車体後部開口を閉じた状態が保持される。   A lock mechanism attaching portion 131 is provided at the lower center of the back door skirt portion 130. In the back door A, a lock mechanism (not shown) attached to the lock mechanism attaching portion 131 engages with a striker (not shown) provided at the lower edge of the vehicle body rear opening, and is linked to the vehicle body. The closed state is maintained.

バックドアインナパネル１００はまた、その外周に外向きフランジ部１０１が形成され、また、ウインド部１４０の内周にも、内向きフランジ部１０２が形成されている。これら外向きフランジ部１０１と内向きフランジ部１０２は、バックドアアウタパネル（図示略）に設けた対応する外向きフランジ部（図示略）と内向きフランジ部（図示略）に合わされて、最中状に接合されたバックドアＡを形成する。   The back door inner panel 100 also has an outward flange portion 101 formed on the outer periphery thereof, and an inward flange portion 102 formed on the inner periphery of the window portion 140. The outward flange portion 101 and the inward flange portion 102 are matched with the corresponding outward flange portion (not shown) and inward flange portion (not shown) provided in the back door outer panel (not shown), and are in the middle state. The back door A joined to is formed.

バックドアインナパネル１００における外向きフランジ部１０１と内向きフランジ部１０２以外の領域は、全体として、外向きフランジ部１０１と内向きフランジ部１０２に対して車室側（前方側）に膨出させられている。したがって、バックドア上部１１０からバックドア左側部１２１およびバックドア右側部１２２にかけては、図２に示すように、コ字状断面部２１０となっている。本実施形態では、コ字状断面部２１０がハット状である。また、バックドア裾部１３０については、その外周部が車室側（前方側）に膨出させられた環状膨出部１３２とされ、この環状膨出部１３２の内側は、後方側に凹入させられた凹入部１３３とされている。なお、環状膨出部１３２は、バックドア左側部１２１およびバックドア右側部１２２のコ字状断面部２１０につなげられている。   The region other than the outward flange portion 101 and the inward flange portion 102 in the back door inner panel 100 is bulged toward the vehicle interior side (front side) with respect to the outward flange portion 101 and the inward flange portion 102 as a whole. It has been. Therefore, from the back door upper part 110 to the back door left side part 121 and the back door right side part 122, as shown in FIG. In the present embodiment, the U-shaped cross section 210 has a hat shape. Further, the back door hem 130 has an annular bulging portion 132 whose outer peripheral portion is bulged toward the passenger compartment side (front side), and the inside of the annular bulging portion 132 is recessed in the rear side. The recessed portion 133 is formed. The annular bulging portion 132 is connected to the U-shaped cross-sectional portion 210 of the back door left side portion 121 and the back door right side portion 122.

バックドア裾部１３０の凹入部１３３には、ロック機構取付け部１３１と、バックドア左側部１２１およびバックドア右側部１２２とバックドア裾部１３０との左右の連結部１５１，１５２とをそれぞれつなぐ斜め方向に沿って延びる左ビード２２１および右ビード２２２が形成されている。この左ビード２２１および右ビード２２２は、凹入部１３３から再び車室側に断面コ字状に膨出する形態とされている。   The recessed portion 133 of the back door skirt 130 has diagonally connecting the lock mechanism attachment portion 131, the back door left side 121, the back door right side 122, and the left and right connecting portions 151 and 152 of the back door skirt 130. A left bead 221 and a right bead 222 extending along the direction are formed. The left bead 221 and the right bead 222 are configured to bulge out from the recessed portion 133 toward the passenger compartment side in a U-shaped cross section.

そして、バックドア裾部１３０における環状膨出部１３２とコ字状断面部２１０とがつながる部分には、リブ２３１，２３２が形成されている。このリブ２３１，２３２は、本実施形態では、左ビード２２１および右ビード２２２に実質的につながる上下方向の縦リブ２３１と、水平方向の横リブ２３２とによって構成され、この縦リブ２３１と横リブ２３２は、いずれも、コ字状断面部２１０の内面２１１，２１２に連結されている。   Ribs 231 and 232 are formed at portions where the annular bulged portion 132 and the U-shaped cross-sectional portion 210 are connected to each other in the back door skirt portion 130. In the present embodiment, the ribs 231 and 232 are constituted by vertical vertical ribs 231 and horizontal horizontal ribs 232 that are substantially connected to the left bead 221 and the right bead 222, and the vertical ribs 231 and the horizontal ribs 231. 232 is connected to the inner surfaces 211 and 212 of the U-shaped cross section 210.

次に、上述の構成を有する樹脂製バックドアの補強構造の作用効果について説明する。   Next, the effect of the reinforcing structure of the resin back door having the above-described configuration will be described.

バックドアインナパネル１００においては、一対のバックドア側部（バックドア左側部１２１およびバックドア右側部１２２）と、一対の連結部１５１，１５２と、一対のビード（左ビード２２１および右ビード２２２）とを含む、左右一対の骨格構造が構成されている。当該骨格構造は、バックドア上部１１０に設けられた一対のヒンジ取付け部１１１，１１２からバックドア裾部１３０に設けられたロック機構取付け部１３１までに至る間において、連続した構造となっている。当該骨格構造は、その形状によりバックドアインナパネル１００において比較的剛性が高い部分に該当する。   In the back door inner panel 100, a pair of back door sides (back door left side 121 and back door right side 122), a pair of connecting portions 151 and 152, and a pair of beads (left bead 221 and right bead 222). A pair of left and right skeleton structures are configured. The skeleton structure is a continuous structure from the pair of hinge attachment portions 111 and 112 provided on the back door upper portion 110 to the lock mechanism attachment portion 131 provided on the back door skirt portion 130. The skeleton structure corresponds to a portion having relatively high rigidity in the back door inner panel 100 due to its shape.

また、バックドアＡの開閉においてロック機構取付け部１３１に作用する反力が当該骨格構造を通じて一対のヒンジ取付け部１１１，１１２に伝達され、さらにその反力はドアヒンジを介して車体に伝達される。このため、当該骨格構造によって、バックドア裾部１３０に作用する反力の集中が低減し、バックドア裾部１３０の変形を抑制することができる。   Further, a reaction force acting on the lock mechanism attachment portion 131 when the back door A is opened and closed is transmitted to the pair of hinge attachment portions 111 and 112 through the skeleton structure, and the reaction force is further transmitted to the vehicle body via the door hinge. For this reason, by the said skeleton structure, concentration of the reaction force which acts on the back door skirt part 130 can be reduced, and the deformation | transformation of the back door skirt part 130 can be suppressed.

その結果、当該骨格構造によれば、別途のリインホースメントを要せずして、樹脂製バックドアの剛性を効果的に高めることができ、バックドアＡの共振周波数を高め、路面からの振動やＣＶＴによる振動に起因したこもり音の発生を極力抑制することができる。   As a result, according to the skeleton structure, the rigidity of the resin back door can be effectively increased without the need for a separate reinforcement, the resonance frequency of the back door A can be increased, and the vibration from the road surface can be increased. It is possible to suppress the generation of a booming noise caused by vibration caused by CVT or as much as possible.

バックドア裾部１３０における環状膨出部１３２とコ字状断面部２１０とがつながる部分には、リブ２３１，２３２が形成されており、このリブ２３１，２３２は、左ビード２２１および右ビード２２２に実質的につながる上下方向の縦リブ２３１と、水平方向の横リブ２３２とによって構成され、この縦リブ２３１と横リブ２３２は、いずれも、コ字状断面部２１０の内面２１１，２１２に連結されているので、これらのリブ２３１，２３２により、連結部１５１，１５２における曲げ剛性を効果的に高めることができる。より具体的には、連結部１５１，１５２に上下方向に沿う曲げの力が作用すると、コ字状断面部２１０の内面２１１，２１２どうしが拡げられ、または押し縮められようとするが、縦リブ２３１および横リブ２３２が協働して、内面２１１，２１２間の間隔を不変に維持し、このことが、連結部１５１，１５２における曲げ剛性の効果的な向上に寄与する。   Ribs 231 and 232 are formed at portions where the annular bulged portion 132 and the U-shaped cross-sectional portion 210 are connected to each other in the back door hem portion 130. The vertical ribs 231 in the vertical direction and the horizontal ribs 232 in the horizontal direction are substantially connected to each other, and both the vertical ribs 231 and the horizontal ribs 232 are connected to the inner surfaces 211 and 212 of the U-shaped cross section 210. Therefore, the ribs 231 and 232 can effectively increase the bending rigidity in the connecting portions 151 and 152. More specifically, when a bending force is applied to the connecting portions 151 and 152 in the vertical direction, the inner surfaces 211 and 212 of the U-shaped cross-sectional portion 210 are expanded or compressed. 231 and the lateral rib 232 cooperate to maintain the distance between the inner surfaces 211 and 212 unchanged, which contributes to an effective improvement of the bending rigidity in the connecting portions 151 and 152.

もちろん、この発明の範囲は上述した実施形態に限定されることはなく、特許請求の範囲に記載した事項の範囲内でのあらゆる設計変更は、すべて本発明の範囲に含まれる。   Of course, the scope of the present invention is not limited to the above-described embodiments, and all design changes within the scope of the matters described in the claims are included in the scope of the present invention.

なお、本発明は、本発明の構成に加えて、別途のリインホースメントを設けて、バックドアＡの剛性をより高くすることを除外するものではない。   Note that the present invention does not exclude the provision of a separate reinforcement in addition to the configuration of the present invention to further increase the rigidity of the back door A.

本実施形態では、バックドア裾部１３０には、横断面形状がコ字状のビードを設けたが、これをリブ形態とすることもできる。また、リブの形態についても、その方向や厚み、高さは、適宜変更可能である。   In the present embodiment, the back door skirt 130 is provided with a bead having a U-shaped cross-sectional shape, but it may be formed in a rib shape. In addition, the direction, thickness, and height of the rib shape can be changed as appropriate.

Ａ：バックドア
１００：バックドアインナパネル
１０１：外向きフランジ部
１０２：内向きフランジ部
１１０：バックドア上部
１１１，１１２：ヒンジ取付け部
１２１：バックドア左側部
１２２：バックドア右側部
１３０：バックドア裾部
１３１：ロック機構取付け部
１３２：環状膨出部
１３３：凹入部
１４０：ウインド部
１５１：連結部（左）
１５２：連結部（右）
２１０：コ字状断面部
２１１，２１２：内面
２２１：左ビード
２２２：右ビード
２３１：リブ（縦）
２３２：リブ（横） A: Back door 100: Back door inner panel 101: Outward flange portion 102: Inward flange portion 110: Back door upper portion 111, 112: Hinge mounting portion 121: Back door left portion 122: Back door right portion 130: Back door Bottom part 131: Lock mechanism attachment part 132: Annular bulging part 133: Recessed part 140: Window part 151: Connection part (left)
152: Connecting part (right)
210: U-shaped cross section 211, 212: inner surface 221: left bead 222: right bead 231: rib (vertical)
232: Rib (horizontal)

Claims (1)

ウインドガラスが設けられるウインド部と、
前記ウインド部よりも車両上方に位置し、かつ車幅方向に延びるとともに、左右一対のヒンジ取付け部が設けられたバックドア上部と、
前記ウインド部よりも車両下方に位置し、かつロック機構取付け部が下部中央に設けられたバックドア裾部と、
前記ウインド部の左右両側に位置し、かつ車両上下方向に延びるとともに、前記バックドア上部と前記バックドア裾部とを連結する一対のバックドア側部と、を備えるバックドアインナパネルを有する樹脂製バックドアの補強構造であって、
前記バックドア側部は、その横断面形状が車両後方に向けて開口したコ字状であり、
前記バックドア裾部は、その上端の左右両側に位置し、かつ一対の前記バックドア側部の下端がつながるとともに、横断面形状が車両後方に向けて開口したコ字状である一対の連結部を有し、
前記バックドア裾部には、前記ロック機構取付け部の左右両側から斜め上方に延びて一対の前記連結部に至る一対のビードが形成され、
一対の前記バックドア側部と、一対の前記連結部と、一対の前記ビードと、を含むことにより、一対の前記ヒンジ取付け部から前記ロック機構取付け部までに至る間において連続した左右一対の骨格構造が構成されていることを特徴とする、樹脂製バックドアの補強構造。 A window part where window glass is provided;
An upper portion of the back door which is located above the window portion and extends in the vehicle width direction and provided with a pair of left and right hinge mounting portions;
A back door hem that is positioned below the vehicle from the window and that has a locking mechanism mounting portion provided at the lower center;
Resin made of resin having a back door inner panel that is located on both the left and right sides of the window portion and extends in the vehicle vertical direction and includes a pair of back door side portions that connect the upper portion of the back door and the back door hem portion. A back door reinforcement structure,
The back door side portion has a U-shaped cross-sectional shape that opens toward the rear of the vehicle,
The back door hem is located on the left and right sides of the upper end of the pair, and the lower ends of the pair of back doors are connected to each other, and the pair of connecting portions having a U-shaped cross section that opens toward the rear of the vehicle. Have
The back door hem is formed with a pair of beads extending obliquely upward from the left and right sides of the lock mechanism mounting portion to reach the pair of connecting portions,
A pair of left and right skeletons that are continuous between the pair of hinge attachment portions and the lock mechanism attachment portion by including a pair of back door side portions, a pair of connection portions, and a pair of beads. A structure for reinforcing a resin back door, characterized in that the structure is configured.
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