JP7054476B2 - Vehicle backdoor structure - Google Patents

Vehicle backdoor structure Download PDF

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JP7054476B2
JP7054476B2 JP2018106335A JP2018106335A JP7054476B2 JP 7054476 B2 JP7054476 B2 JP 7054476B2 JP 2018106335 A JP2018106335 A JP 2018106335A JP 2018106335 A JP2018106335 A JP 2018106335A JP 7054476 B2 JP7054476 B2 JP 7054476B2
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vehicle
back door
inner panel
latch mounting
reinforcing
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JP2019209782A (en
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幸司 土田
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Suzuki Motor Co Ltd
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Suzuki Motor Co Ltd
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本発明は、車両のバックドア構造に関する。 The present invention relates to a vehicle back door structure.

従来、車両の車体後部には、開閉可能なバックドアが設けられているタイプのものがあり、該バックドアによって車体後部の開口部が開閉されるようになっている。また、このようなバックドアの車両幅方向中央付近の下部には、車体と連結可能なラッチを取付けるラッチ取付部が設けられており、当該バックドアは、インナパネルとアウタパネルとによって構成されている。
一方、車両のバックドア構造においては、入力される外部荷重によるバックドアの変形モードを抑制することが求められている。そのため、車両のバックドア構造の中には、バックドアがインナパネルとアウタパネルとにより構成されている場合に、ラッチ取付部付近の高い剛性を利用するため、インナパネルとアウタパネルに補強部材を連結し、低剛性パネルであるインナパネルへの入力荷重が補強部材を用いてラッチ取付部付近に伝達されるようにしたものがある(例えば、特許文献1参照)。
Conventionally, there is a type in which a back door that can be opened and closed is provided at the rear portion of the vehicle body, and the opening at the rear portion of the vehicle body is opened and closed by the back door. Further, a latch mounting portion for attaching a latch that can be connected to the vehicle body is provided at the lower portion of such a back door near the center in the vehicle width direction, and the back door is composed of an inner panel and an outer panel. ..
On the other hand, in the back door structure of a vehicle, it is required to suppress the deformation mode of the back door due to the input external load. Therefore, in the back door structure of the vehicle, when the back door is composed of an inner panel and an outer panel, a reinforcing member is connected to the inner panel and the outer panel in order to utilize the high rigidity near the latch mounting portion. In some cases, the input load to the inner panel, which is a low-rigidity panel, is transmitted to the vicinity of the latch mounting portion by using a reinforcing member (see, for example, Patent Document 1).

特開2011-148463号公報Japanese Unexamined Patent Publication No. 2011-148436

しかしながら、上述した従来の車両のバックドア構造では、バックドアの車両幅方向中央部と左右両側部との間に補強部材などが設けられていないので、バックドアの左右両側の角部付近に荷重が入力されると、バックドアのアウタパネル及びインナパネルの両方を変動させる変形モードに対して、バックドアの変形を抑制することが不十分となる問題を有していた。 However, in the above-mentioned conventional back door structure of a vehicle, since a reinforcing member or the like is not provided between the center portion of the back door in the vehicle width direction and the left and right side portions, a load is applied near the left and right corner portions of the back door. When is input, there is a problem that it is insufficient to suppress the deformation of the back door with respect to the deformation mode in which both the outer panel and the inner panel of the back door are changed.

本発明はこのような実状に鑑みてなされたものであって、その目的は、ラッチ取付部が位置するインナパネルに第1補強部を設け、該第1補強部を高剛性部の膨出部及び前側屈曲部と後側屈曲部に連結し、インナパネルに入力された荷重を第1補強部を介して高剛性部へ伝達することにより、バックドアの剛性を向上させ、変形モードを抑制することが可能な車両のバックドア構造を提供することにある。 The present invention has been made in view of such an actual situation, and an object thereof is to provide a first reinforcing portion on an inner panel in which a latch mounting portion is located, and to use the first reinforcing portion as a bulging portion of a high rigidity portion. And by connecting to the front bending part and the rear bending part and transmitting the load input to the inner panel to the high rigidity part via the first reinforcing part, the rigidity of the back door is improved and the deformation mode is suppressed. It is to provide a vehicle backdoor structure capable.

上記従来技術の有する課題を解決するために、本発明は、車体後部に設けられる開閉可能なバックドアであって、該バックドアは、インナパネルとアウタパネルを備え、前記バックドアの下部には、車体と連結可能なラッチを取付けるラッチ取付部が設けられ、該ラッチ取付部は、前記バックドアが閉じられた状態で車両下側に膨出する膨出部を有している車両のバックドア構造において、前記ラッチ取付部が位置する前記インナパネルには、車両幅方向へ延びる第1補強部が設けられ、該第1補強部の内側端部は、前記膨出部及び前記インナパネルの前側屈曲部と連結し、前記第1補強部の外側端部は、前記インナパネルの後側屈曲部と連結するように配置されている。 In order to solve the problems of the prior art, the present invention is an openable / closable back door provided at the rear of the vehicle body, the back door including an inner panel and an outer panel, and a lower portion of the back door. A latch mounting portion for mounting a latch that can be connected to the vehicle body is provided, and the latch mounting portion has a back door structure of a vehicle having a bulging portion that bulges downward in the vehicle with the back door closed. In the inner panel where the latch mounting portion is located, a first reinforcing portion extending in the vehicle width direction is provided, and the inner end portion of the first reinforcing portion is a bulging portion and a front bending of the inner panel. The outer end portion of the first reinforcing portion is arranged so as to be connected to the portion and to be connected to the rear bending portion of the inner panel.

上述の如く、本発明に係る車両のバックドア構造は、車体後部に設けられる開閉可能なバックドアであって、該バックドアは、インナパネルとアウタパネルを備え、前記バックドアの下部には、車体と連結可能なラッチを取付けるラッチ取付部が設けられ、該ラッチ取付部は、前記バックドアが閉じられた状態で車両下側に膨出する膨出部を有しており、前記ラッチ取付部が位置する前記インナパネルには、車両幅方向へ延びる第1補強部が設けられ、該第1補強部の内側端部は、前記膨出部及び前記インナパネルの前側屈曲部と連結し、前記第1補強部の外側端部は、前記インナパネルの後側屈曲部と連結するように配置されている。
すなわち、本発明に係る車両のバックドア構造においては、高剛性部である膨出部及び前側屈曲部と後側屈曲部とが第1補強部によって連結されることになる。したがって、本発明に係る車両のバックドア構造では、インナパネルの車体接触部から加わる車両前後方向の荷重など、インナパネルに入力された荷重が第1補強部から高剛性部に伝達されることになるので、インナパネルを含むバックドアの剛性を向上させることができるとともに、車室内の振動、騒音などの乗り心地に影響を及ぼすバックドアの変形モードを効果的に抑制することができる。
As described above, the vehicle back door structure according to the present invention is an openable / closable back door provided at the rear of the vehicle body, the back door including an inner panel and an outer panel, and a vehicle body at the lower portion of the back door. A latch mounting portion for mounting a latch that can be connected to the vehicle is provided, and the latch mounting portion has a bulging portion that bulges downward in the vehicle with the back door closed. The inner panel located is provided with a first reinforcing portion extending in the vehicle width direction, and the inner end portion of the first reinforcing portion is connected to the bulging portion and the front bending portion of the inner panel, and the first reinforcing portion is connected to the inner panel. 1 The outer end portion of the reinforcing portion is arranged so as to be connected to the rear bending portion of the inner panel.
That is, in the back door structure of the vehicle according to the present invention, the bulging portion, which is a highly rigid portion, the front bending portion, and the rear bending portion are connected by the first reinforcing portion. Therefore, in the vehicle back door structure according to the present invention, the load input to the inner panel, such as the load applied from the vehicle body contact portion of the inner panel in the vehicle front-rear direction, is transmitted from the first reinforcing portion to the high-rigidity portion. Therefore, the rigidity of the back door including the inner panel can be improved, and the deformation mode of the back door that affects the riding comfort such as vibration and noise in the vehicle interior can be effectively suppressed.

本発明の実施形態に係る構造が適用される車両のバックドアを車室内の車両前方下側から見た斜視図である。It is a perspective view of the back door of the vehicle to which the structure which concerns on embodiment of this invention is applied seen from the front lower side of the vehicle interior. 図1のバックドアを車室内の車両前方下側から見た正面図である。It is a front view which looked at the back door of FIG. 1 from the front lower side of the vehicle in the vehicle interior. 図1において、バックドアのインナパネルに設けられた第1補強部及びその周辺を拡大して示す斜視図である。FIG. 1 is an enlarged perspective view showing a first reinforcing portion provided on an inner panel of a back door and its periphery thereof. 図1において、ラッチ取付部が位置するインナパネルの車両後方側に設けられるリンフォースメントを示す斜視図である。FIG. 1 is a perspective view showing a reinforcement provided on the vehicle rear side of an inner panel in which a latch mounting portion is located. 図2におけるA-A線断面図である。FIG. 2 is a cross-sectional view taken along the line AA in FIG.

以下、本発明を図示の実施の形態に基づいて詳細に説明する。
図1~図5は本発明の実施形態に係る車両のバックドア構造を示すものである。なお、図において、矢印I方向は車室内側を示し、矢印O方向は車両外側を示し、矢印X方向は車両幅方向を示している。
Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
1 to 5 show a back door structure of a vehicle according to an embodiment of the present invention. In the figure, the arrow I direction indicates the vehicle interior side, the arrow O direction indicates the vehicle outside, and the arrow X direction indicates the vehicle width direction.

図1~図5に示すように、本発明の実施形態の構造が適用される車両のバックドア1は、車体後部に開閉可能に設けられており、当該バックドア1によって車体後部のバックドア開口部(図示せず)を開閉可能に覆うように構成されている。このようなバックドア1は、車両内側に設けられるインナパネル2と、車両外側に設けられるアウタパネル3を備えており、インナパネル2及びアウタパネル3の重ね合わせ部分が溶接などで接合されて形成されている。インナパネル2の車室内側には、内装部品であるバックドアトリム4が取付けられている。
また、バックドア1の下部であって、車両幅方向中央部分には、車体と連結可能なラッチ(図示せず)を取付けるラッチ取付部5が設けられており、該ラッチ取付部5は、バックドア1が閉じられた状態で車両下側に膨出する膨出部51有している。膨出部51は、ラッチ取付部5の周囲に位置する上部及び左右両側部を囲むような形状に形成されている。なお、図外のラッチは、バックドア1の閉時において、車体側のストライカ(図示せず)と係合することにより、バックドア1の閉状態を確保するために設けられるものである。
As shown in FIGS. 1 to 5, the back door 1 of the vehicle to which the structure of the embodiment of the present invention is applied is provided to be openable and closable at the rear portion of the vehicle body, and the back door 1 opens the back door at the rear portion of the vehicle body. It is configured to cover the part (not shown) so that it can be opened and closed. Such a back door 1 includes an inner panel 2 provided inside the vehicle and an outer panel 3 provided on the outside of the vehicle, and is formed by joining the overlapped portions of the inner panel 2 and the outer panel 3 by welding or the like. There is. A back door trim 4, which is an interior component, is attached to the vehicle interior side of the inner panel 2.
Further, a latch mounting portion 5 for mounting a latch (not shown) that can be connected to the vehicle body is provided in the lower portion of the back door 1 at the central portion in the vehicle width direction, and the latch mounting portion 5 is a back. It has a bulging portion 51 that bulges downward of the vehicle when the door 1 is closed. The bulging portion 51 is formed in a shape that surrounds the upper portion and the left and right side portions located around the latch mounting portion 5. The latch (not shown) is provided to secure the closed state of the back door 1 by engaging with a striker (not shown) on the vehicle body side when the back door 1 is closed.

本実施形態のラッチ取付部5が位置するインナパネル2には、図1~図4に示すように、車両幅方向へ連続して延びる第1補強部21がラッチ取付部5を間に置いて左右両側にそれぞれ設けられている。すなわち、左右両側の第1補強部21は、ラッチ取付部5の配置箇所からそれぞれ車両外側へ向かって直線的に延びている。しかも、第1補強部21の内側端部21aは、高剛性部である膨出部51及びインナパネル2の前側屈曲部22と連結している一方、第1補強部21の外側端部21bは、インナパネル2の後側屈曲部23と連結するように傾斜して配置されている。
第1補強部21は、インナパネル2の表面から車両下側へ向かって突出する湾曲した凸形状に形成されている。そして、前側屈曲部22は、インナパネル3の前側部分を屈曲させることにより車両下側へ向かって湾曲した形状に形成され、後側屈曲部23は、インナパネル3の後側部分を屈曲させることにより車両上側へ向かって湾曲した形状に形成されている。
On the inner panel 2 where the latch mounting portion 5 of the present embodiment is located, as shown in FIGS. 1 to 4, a first reinforcing portion 21 continuously extending in the vehicle width direction has a latch mounting portion 5 in between. It is provided on both the left and right sides. That is, the first reinforcing portions 21 on both the left and right sides extend linearly from the arrangement portion of the latch mounting portion 5 toward the outside of the vehicle. Moreover, the inner end portion 21a of the first reinforcing portion 21 is connected to the bulging portion 51 which is a highly rigid portion and the front bending portion 22 of the inner panel 2, while the outer end portion 21b of the first reinforcing portion 21 is connected. , Is inclined so as to be connected to the rear bending portion 23 of the inner panel 2.
The first reinforcing portion 21 is formed in a curved convex shape protruding from the surface of the inner panel 2 toward the lower side of the vehicle. The front bending portion 22 is formed in a shape curved toward the lower side of the vehicle by bending the front portion of the inner panel 3, and the rear bending portion 23 bends the rear portion of the inner panel 3. It is formed in a curved shape toward the upper side of the vehicle.

また、第1補強部21の外側端部21bは、図1に示すように、ラッチ取付部5の車両幅方向外側で上下に位置する2つの曲面部24,25まで延出されている。これら曲面部24,25は、インナパネル2の車両幅方向左右両側の角部D付近にそれぞれ設けられ、車両後方側から角部Dを通って車両前方側へ向かう湾曲形状に形成されており、インナパネル2の一般面部と比べて高い剛性を有している。すなわち、本実施形態のインナパネル2は、第1補強部21の外側端部21bを曲面部24,25の位置まで延出することによって、曲面部24,25の剛性を利用することが可能となり、第1補強部21に掛かる車両前後方向の荷重が受けられるように構成されている。 Further, as shown in FIG. 1, the outer end portion 21b of the first reinforcing portion 21 extends to two curved surface portions 24 and 25 located vertically on the outer side in the vehicle width direction of the latch mounting portion 5. These curved surfaces 24 and 25 are provided near the corners D on both the left and right sides of the inner panel 2 in the vehicle width direction, and are formed in a curved shape from the rear side of the vehicle to the front side of the vehicle through the corners D. It has higher rigidity than the general surface portion of the inner panel 2. That is, the inner panel 2 of the present embodiment can utilize the rigidity of the curved surface portions 24 and 25 by extending the outer end portion 21b of the first reinforcing portion 21 to the positions of the curved surface portions 24 and 25. , The first reinforcing portion 21 is configured to receive a load in the front-rear direction of the vehicle.

さらに、本実施形態のラッチ取付部5が位置するインナパネル2の車両幅方向外側の角部D付近には、図1~図3に示すように、弾力性を有し、かつバックドア1の閉時に車体と当接して衝撃力を吸収する緩衝部材6が設けられている。そして、第1補強部21の外側端部21bは、緩衝部材6の車両内側に位置している。これによって、バックドア1の閉時などに緩衝部材6からインナパネル3に入力される荷重は、第1補強部21を介してラッチ取付部5の膨出部51及びインナパネル3の前側屈曲部22に伝達されるようになっている。 Further, as shown in FIGS. 1 to 3, in the vicinity of the corner D on the outer side in the vehicle width direction of the inner panel 2 where the latch mounting portion 5 of the present embodiment is located, the inner panel 2 has elasticity and the back door 1 is provided. A cushioning member 6 that comes into contact with the vehicle body and absorbs an impact force when closed is provided. The outer end portion 21b of the first reinforcing portion 21 is located inside the vehicle of the cushioning member 6. As a result, the load input from the cushioning member 6 to the inner panel 3 when the back door 1 is closed is applied to the bulging portion 51 of the latch mounting portion 5 and the front bending portion of the inner panel 3 via the first reinforcing portion 21. It is designed to be transmitted to 22.

また、本実施形態のインナパネル2は、図3に示すように、ラッチ取付部5の車両幅方向外側に位置し、第1補強部21によって2つに区切られた第1平面部26と第2平面部27を有しており、これら第1平面部26及び第2平面部27は、車両前方下側から見て、互いに向かい合う直角三角形状に形成されている。第1平面部26は車両前方側に配置され、第2平面部27は車両後方側に配置されている。そして、第2平面部は、バックドア1が閉じられた状態で、ラッチ取付部5と第1平面部26との車両上下方向の間に位置している。すなわち、これら部位の高さ位置は、上から下に向かって順に、第1平面部26、第2平面部27、ラッチ取付部5の膨出部51となるように設定されている。
これにより、第1補強部21がインナパネル2に入力された荷重を前側屈曲部22へ伝達する際に、膨出部51との連結部及び後側屈曲部23との連結部の付け根部B1,B2に荷重が集中しても、この荷重は第1補強部21を介して高剛性部の前側屈曲部22に伝達されるため、連結部の付け根部B1,B2への局所的な応力集中が避けられ、インナパネル2の破断が抑制されるようになっている。
Further, as shown in FIG. 3, the inner panel 2 of the present embodiment is located outside the latch mounting portion 5 in the vehicle width direction, and is divided into two by the first reinforcing portion 21 and the first plane portion 26 and the second. It has two flat surface portions 27, and the first flat surface portion 26 and the second flat surface portion 27 are formed in a right-angled triangular shape facing each other when viewed from the front lower side of the vehicle. The first flat surface portion 26 is arranged on the front side of the vehicle, and the second flat surface portion 27 is arranged on the rear side of the vehicle. The second flat surface portion is located between the latch mounting portion 5 and the first flat surface portion 26 in the vertical direction of the vehicle with the back door 1 closed. That is, the height positions of these portions are set so as to be the first flat surface portion 26, the second flat surface portion 27, and the bulging portion 51 of the latch mounting portion 5 in this order from top to bottom.
As a result, when the first reinforcing portion 21 transmits the load input to the inner panel 2 to the front bending portion 22, the base portion B1 of the connecting portion with the bulging portion 51 and the connecting portion with the rear bending portion 23 , Even if the load is concentrated on B2, this load is transmitted to the front bending portion 22 of the high rigidity portion via the first reinforcing portion 21, so that the local stress concentration is applied to the base portions B1 and B2 of the connecting portion. Is avoided, and the breakage of the inner panel 2 is suppressed.

さらに、本実施形態のラッチ取付部5が位置するインナパネル2の車両後方側(アウタパネル3側)には、図4及び図5に示すように、ラッチ取付部5の剛性を高める板状のリンフォースメント7が設けられており、該リンフォースメント7は、インナパネル2の後面に沿った形状に屈曲形成されている。そして、インナパネル2の前側屈曲部22とリンフォースメント7とは、車両下側方向視で重なり合った位置に配置されている。しかも、リンフォースメント7は、前側端部7aが前側屈曲部22を跨いでラッチ取付部5の上部のインナパネル2に接合され、接合部W1において連結されているとともに、後側端部7bがラッチ取付部5の下部のインナパネル2に接合され、接合部W2において連結されている。すなわち、リンフォースメント7の前側端部7aがインナパネル2の前側屈曲部22に連結され、ラッチ取付部5がリンフォースメント7の前側に重なり合って配置されることになり、インナパネル2に入力された荷重が、ラッチ取付部5の膨出部51に連結された第1補強部21の内側端部21aを介して、高剛性部である前側屈曲部22及び膨出部51に伝達され、当該高剛性部に集中するように構成されている。 Further, as shown in FIGS. 4 and 5, on the vehicle rear side (outer panel 3 side) of the inner panel 2 where the latch mounting portion 5 of the present embodiment is located, a plate-shaped phosphorus that increases the rigidity of the latch mounting portion 5 is provided. A forcement 7 is provided, and the reinforcement 7 is bent and formed in a shape along the rear surface of the inner panel 2. The front bending portion 22 of the inner panel 2 and the reinforcement 7 are arranged at overlapping positions in the downward view of the vehicle. Moreover, in the reinforcement 7, the front end portion 7a straddles the front bending portion 22 and is joined to the inner panel 2 at the upper part of the latch mounting portion 5, and is connected at the joining portion W1 while the rear end portion 7b is joined. It is joined to the inner panel 2 at the lower part of the latch mounting portion 5, and is connected at the joint portion W2. That is, the front end portion 7a of the reinforcement 7 is connected to the front bending portion 22 of the inner panel 2, and the latch mounting portion 5 is arranged so as to overlap the front side of the reinforcement 7, and is input to the inner panel 2. The applied load is transmitted to the front bending portion 22 and the bulging portion 51, which are highly rigid portions, via the inner end portion 21a of the first reinforcing portion 21 connected to the bulging portion 51 of the latch mounting portion 5. It is configured to concentrate on the high-rigidity portion.

このように、本発明の実施形態に係る車両のバックドア構造は、車体後部に設けられる開閉可能なバックドア1であり、バックドア1は、インナパネル2とアウタパネル3を備えている。バックドア1の下部には、車体と連結可能なラッチを取付けるラッチ取付部5が設けられ、ラッチ取付部5は、バックドア1が閉じられた状態で車両下側に膨出する膨出部51を有している。そして、ラッチ取付部5が位置するインナパネル2には、車両幅方向へ延びる第1補強部21が設けられ、第1補強部21の内側端部21aは、膨出部51及びインナパネル2の前側屈曲部22と連結し、第1補強部21の外側端部21bは、インナパネル2の後側屈曲部23と連結するように配置されている。
そのため、本実施形態のバックドア構造では、第1補強部21の内側端部21aが高剛性部であるラッチ取付部5の膨出部51及びインナパネル2の前側屈曲部22と連結され、第1補強部21の外側端部21bがインナパネル2の後側屈曲部23と連結されることになる。したがって、本実施形態のバックドア構造によれば、バックドア1の閉時等において、インナパネル2に入力された荷重が第1補強部21から膨出部51及び前側屈曲部22の高剛性部に伝達されることになるので、バックドア1の剛性、特にインナパネル2の剛性を向上させることができ、車室内の振動、騒音などの乗り心地に影響を及ぼすバックドア1の変形モードを抑制することができる。
As described above, the back door structure of the vehicle according to the embodiment of the present invention is an openable / closable back door 1 provided at the rear of the vehicle body, and the back door 1 includes an inner panel 2 and an outer panel 3. A latch mounting portion 5 for mounting a latch that can be connected to the vehicle body is provided at the lower portion of the back door 1, and the latch mounting portion 5 is a bulging portion 51 that bulges downward in the vehicle with the back door 1 closed. have. The inner panel 2 in which the latch mounting portion 5 is located is provided with the first reinforcing portion 21 extending in the vehicle width direction, and the inner end portion 21a of the first reinforcing portion 21 is the bulging portion 51 and the inner panel 2. The outer end portion 21b of the first reinforcing portion 21 is arranged so as to be connected to the front bending portion 22 and to be connected to the rear bending portion 23 of the inner panel 2.
Therefore, in the back door structure of the present embodiment, the inner end portion 21a of the first reinforcing portion 21 is connected to the bulging portion 51 of the latch mounting portion 5 which is a highly rigid portion and the front bending portion 22 of the inner panel 2. 1 The outer end portion 21b of the reinforcing portion 21 is connected to the rear bending portion 23 of the inner panel 2. Therefore, according to the back door structure of the present embodiment, when the back door 1 is closed or the like, the load input to the inner panel 2 is a highly rigid portion of the bulging portion 51 and the front bending portion 22 from the first reinforcing portion 21. Therefore, the rigidity of the back door 1, especially the rigidity of the inner panel 2, can be improved, and the deformation mode of the back door 1 that affects the riding comfort such as vibration and noise in the vehicle interior is suppressed. can do.

また、本実施形態のバックドア構造では、第1補強部21の外側端部21bが、ラッチ取付部5の車両幅方向外側に位置する曲面部24,25まで延出されているので、曲面部24,25の剛性を利用することができ、第1補強部21に掛かる車両前後方向の荷重を効果的に支持することができる。 Further, in the back door structure of the present embodiment, the outer end portion 21b of the first reinforcing portion 21 extends to the curved surface portions 24 and 25 located outside the latch mounting portion 5 in the vehicle width direction, so that the curved surface portion The rigidity of 24 and 25 can be utilized, and the load applied to the first reinforcing portion 21 in the vehicle front-rear direction can be effectively supported.

さらに、本実施形態のバックドア構造では、ラッチ取付部5が位置するインナパネル2の車両幅方向外側に緩衝部材6が設けられており、第1補強部21の外側端部21bが緩衝部材6の車両幅方向内側に位置しているので、バックドア1の閉時などに緩衝部材6からインナパネル3に入力される荷重を、第1補強部21を介してラッチ取付部5の膨出部51及びインナパネル3の前側屈曲部22の高剛性部へ円滑に伝達することができ、高剛性部に応力を集中させることができる。 Further, in the back door structure of the present embodiment, the cushioning member 6 is provided on the outer side in the vehicle width direction of the inner panel 2 where the latch mounting portion 5 is located, and the outer end portion 21b of the first reinforcing portion 21 is the cushioning member 6. Since it is located inside in the vehicle width direction, the load input from the cushioning member 6 to the inner panel 3 when the back door 1 is closed is applied to the bulging portion of the latch mounting portion 5 via the first reinforcing portion 21. The stress can be smoothly transmitted to the high-rigidity portion of the front bending portion 22 of the 51 and the inner panel 3, and the stress can be concentrated on the high-rigidity portion.

そして、本実施形態のバックドア構造では、インナパネル2が第1補強部21によって区切られた第1平面部26と第2平面部27を有している。また、第1平面部26は、車両前方側に配置され、第2平面部27は、車両後方側に配置されている。しかも、第2平面部27は、バックドア1が閉じられた状態で、ラッチ取付部5と第1平面部26との車両上下方向の間に位置している。
そのため、本実施形態のバックドア構造では、第1補強部21がインナパネル2に入力された荷重を前側屈曲部22へ伝達する際に、膨出部51との連結部及び後側屈曲部23との連結部の付け根部B1,B2に荷重が集中する場合でも、当該箇所の荷重を第1補強部21によって高剛性部の前側屈曲部22に伝達することが可能となり、これら付け根部B1,B2への局所的な応力集中を回避でき、インナパネル2の破断を抑制することができる。したがって、本実施形態のバックドア構造によれば、インナパネル2に入力された荷重の高剛性部への集中が容易となり、インナパネル2を含むバックドア1に対する荷重の伝達が促進されるので、バックドア1の車両前後方向に対する剛性の向上を図ることができるとともに、変形モードの発生を低減させることができる。
Further, in the back door structure of the present embodiment, the inner panel 2 has a first flat surface portion 26 and a second flat surface portion 27 separated by the first reinforcing portion 21. Further, the first flat surface portion 26 is arranged on the front side of the vehicle, and the second flat surface portion 27 is arranged on the rear side of the vehicle. Moreover, the second flat surface portion 27 is located between the latch mounting portion 5 and the first flat surface portion 26 in the vertical direction of the vehicle with the back door 1 closed.
Therefore, in the back door structure of the present embodiment, when the first reinforcing portion 21 transmits the load input to the inner panel 2 to the front bending portion 22, the connecting portion with the bulging portion 51 and the rear bending portion 23 Even when the load is concentrated on the bases B1 and B2 of the connecting portion with, the load of the relevant portion can be transmitted to the front bending portion 22 of the high rigidity portion by the first reinforcing portion 21, and these base portions B1 and B1 can be transmitted. Local stress concentration on B2 can be avoided, and breakage of the inner panel 2 can be suppressed. Therefore, according to the back door structure of the present embodiment, the load input to the inner panel 2 can be easily concentrated on the high-rigidity portion, and the load transmission to the back door 1 including the inner panel 2 is promoted. The rigidity of the back door 1 in the front-rear direction of the vehicle can be improved, and the occurrence of the deformation mode can be reduced.

また、本実施形態のバックドア構造において、ラッチ取付部5が位置するインナパネル2の車両後方側には、リンフォースメント7が設けられており、インナパネル2の前側屈曲部22とリンフォースメント7とは、車両下側方向視で重なり合った位置に配置されている。そして、リンフォースメント7は、前側端部7aが前側屈曲部22を跨いでラッチ取付部5の上部に連結されているとともに、後側端部7bがラッチ取付部5の下部に連結されている。したがって、本実施形態のバックドア構造によれば、インナパネル2に入力された荷重を高剛性部へ容易に集中させることができ、高剛性部と連結する第1補強部21の変形モードの抑制効果を高めることができる。 Further, in the back door structure of the present embodiment, a reinforcement 7 is provided on the vehicle rear side of the inner panel 2 where the latch mounting portion 5 is located, and the front bending portion 22 and the reinforcement of the inner panel 2 are provided. Reference numeral 7 is arranged at an overlapping position in the downward view of the vehicle. In the reinforcement 7, the front end portion 7a is connected to the upper part of the latch mounting portion 5 across the front bending portion 22, and the rear end portion 7b is connected to the lower part of the latch mounting portion 5. .. Therefore, according to the back door structure of the present embodiment, the load input to the inner panel 2 can be easily concentrated on the high-rigidity portion, and the deformation mode of the first reinforcing portion 21 connected to the high-rigidity portion is suppressed. The effect can be enhanced.

以上、本発明の実施の形態につき述べたが、本発明は既述の実施の形態に限定されるものではなく、本発明の技術的思想に基づいて各種の変形及び変更が可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications and modifications can be made based on the technical idea of the present invention.

1 バックドア
2 インナパネル
3 アウタパネル
5 ラッチ取付部
6 緩衝部材
7 リンフォースメント
7a 前側端部
7b 後側端部
21 第1補強部
21a 内側端部
21b 外側端部
22 インナパネルの前側屈曲部
23 インナパネルの後側屈曲部
24,25 曲面部
26 第1平面部
27 第2平面部
51 膨出部
1 Back door 2 Inner panel 3 Outer panel 5 Latch mounting part 6 Cushioning member 7 Reinforcement 7a Front end 7b Rear end 21 First reinforcement 21a Inner end 21b Outer end 22 Front bending part of inner panel 23 Inner Posterior bent part of panel 24,25 Curved part
26 1st plane part 27 2nd plane part 51 Swelling part

Claims (5)

車体後部に設けられる開閉可能なバックドアであって、該バックドアは、インナパネルとアウタパネルを備え、前記バックドアの下部には、車体と連結可能なラッチを取付けるラッチ取付部が設けられ、該ラッチ取付部は、前記バックドアが閉じられた状態で車両下側に膨出する膨出部を有している車両のバックドア構造において、
前記ラッチ取付部が位置する前記インナパネルには、車両幅方向へ延びる第1補強部が設けられ、該第1補強部の内側端部は、前記膨出部及び前記インナパネルの前側屈曲部と連結し、前記第1補強部の外側端部は、前記インナパネルの後側屈曲部と連結するように配置されていることを特徴とする車両のバックドア構造。
A back door that can be opened and closed at the rear of the vehicle body, the back door is provided with an inner panel and an outer panel, and a latch mounting portion for attaching a latch that can be connected to the vehicle body is provided at the lower portion of the back door. The latch mounting portion is used in a vehicle back door structure having a bulging portion that bulges downward from the vehicle when the back door is closed.
The inner panel on which the latch mounting portion is located is provided with a first reinforcing portion extending in the vehicle width direction, and the inner end portion of the first reinforcing portion is a bulging portion and a front bending portion of the inner panel. A vehicle back door structure that is connected and the outer end portion of the first reinforcing portion is arranged so as to be connected to the rear bending portion of the inner panel.
前記第1補強部の外側端部は、前記ラッチ取付部の車両幅方向外側に位置する曲面部まで延出されていることを特徴とする請求項1に記載の車両のバックドア構造。 The back door structure of a vehicle according to claim 1, wherein the outer end portion of the first reinforcing portion extends to a curved surface portion located outside in the vehicle width direction of the latch mounting portion. 前記ラッチ取付部が位置する前記インナパネルの車両幅方向外側には、緩衝部材が設けられ、前記第1補強部の外側端部は、前記緩衝部材の車両幅方向内側に位置していることを特徴とする請求項1または2に記載の車両のバックドア構造。 A cushioning member is provided on the outer side of the inner panel in which the latch mounting portion is located in the vehicle width direction, and the outer end portion of the first reinforcing portion is located on the inner side of the cushioning member in the vehicle width direction. The vehicle backdoor structure according to claim 1 or 2. 前記インナパネルは、前記第1補強部によって区切られた第1平面部と第2平面部を有し、前記第1平面部は車両前方側に配置され、前記第2平面部は車両後方側に配置されているとともに、前記第2平面部は、前記バックドアが閉じられた状態で、前記ラッチ取付部と前記第1平面部との車両上下方向の間に位置していることを特徴とする請求項1~3のいずれか1つに記載の車両のバックドア構造。 The inner panel has a first plane portion and a second plane portion separated by the first reinforcing portion, the first plane portion is arranged on the front side of the vehicle, and the second plane portion is on the rear side of the vehicle. The second flat surface portion is arranged and is characterized in that the second flat surface portion is located between the latch mounting portion and the first flat surface portion in the vehicle vertical direction in a state where the back door is closed. The vehicle back door structure according to any one of claims 1 to 3. 前記ラッチ取付部が位置する前記インナパネルの車両後方側には、リンフォースメントが設けられ、前記インナパネルの前側屈曲部と前記リンフォースメントとは、車両下側方向視で重なり合った位置に配置され、前記リンフォースメントは、前側端部が前記前側屈曲部を跨いで前記ラッチ取付部の上部に連結されているとともに、後側端部が前記ラッチ取付部の下部に連結されていることを特徴とする請求項1~4のいずれか1つに記載の車両のバックドア構造。
A reinforcement is provided on the vehicle rear side of the inner panel where the latch mounting portion is located, and the front bending portion of the inner panel and the reinforcement are arranged at positions where they overlap each other in the vehicle downward view. The reinforcement is such that the front end is connected to the upper part of the latch mounting portion across the front bending portion, and the rear end is connected to the lower part of the latch mounting portion. The vehicle back door structure according to any one of claims 1 to 4, which is characterized.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010143536A (en) 2008-12-22 2010-07-01 Daihatsu Motor Co Ltd Reinforcement structure of vehicular back door
WO2011058658A1 (en) 2009-11-16 2011-05-19 トヨタ自動車株式会社 Top-hinged door structure
JP2011148463A (en) 2010-01-25 2011-08-04 Mazda Motor Corp Back door structure of vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6323309B2 (en) * 2014-11-25 2018-05-16 スズキ株式会社 Vehicle door structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010143536A (en) 2008-12-22 2010-07-01 Daihatsu Motor Co Ltd Reinforcement structure of vehicular back door
WO2011058658A1 (en) 2009-11-16 2011-05-19 トヨタ自動車株式会社 Top-hinged door structure
JP2011148463A (en) 2010-01-25 2011-08-04 Mazda Motor Corp Back door structure of vehicle

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