JP5769515B2 - Vehicle back door - Google Patents

Vehicle back door Download PDF

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JP5769515B2
JP5769515B2 JP2011142175A JP2011142175A JP5769515B2 JP 5769515 B2 JP5769515 B2 JP 5769515B2 JP 2011142175 A JP2011142175 A JP 2011142175A JP 2011142175 A JP2011142175 A JP 2011142175A JP 5769515 B2 JP5769515 B2 JP 5769515B2
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vehicle
width direction
inner panel
vehicle width
door
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JP2013006570A (en
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畠山　一樹
一樹 畠山
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Daikyo Nishikawa Corp
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Daikyo Nishikawa Corp
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Description

この発明は、車両用バックドアの改良に関し、詳しくは、車体後端上部に一対のヒンジで上部が支持された樹脂製ドアインナーパネルの熱膨張による変形防止対策に関するものである。   The present invention relates to an improvement in a vehicle back door, and more particularly, to a measure for preventing deformation due to thermal expansion of a resin door inner panel whose upper portion is supported by a pair of hinges at a rear end upper portion of a vehicle body.

ドアインナーパネルとドアアウターパネルとからなる車両用バックドアにおいて、少なくともドアインナーパネルが樹脂製である場合、陽差しの厳しい真夏時（熱間時）等にはドアインナーパネルが熱膨張により変形するおそれがある。   In a vehicle back door composed of a door inner panel and a door outer panel, if at least the door inner panel is made of resin, the door inner panel is deformed by thermal expansion in the midsummer when the sunlight is severe (during hot weather). There is a fear.

つまり、図１２に示すように、ドアインナーパネルａの上部には、一対のヒンジ取付部ｂが車幅方向に間隔をあけて設けられていて、車体後端上部に車幅方向に間隔をあけて設けられた一対のヒンジに上記ヒンジ取付部ｂが連結されている。また、車体後端両側部の各々には、ダンパーｃの一端（図１２で上端）が取り付けられるとともに、上記ダンパーｃの他端（図１２で下端）が上記ドアインナーパネルａの車幅方向両側端縁に取り付けられている。したがって、ドア閉状態では、上記ドアインナーパネルａの車幅方向両側端縁には、上記ダンパーｃの収縮による反発力（下方への押出し力）が作用している。このため、陽差しの厳しい真夏時（熱間時）等には、上記ダンパーｃの収縮による反発力に加え、上記ドアインナーパネルａが熱膨張により車幅方向に延びることで、ドアインナーパネルａの上部において、図１２に一点鎖線ｄで示すように、車幅方向中央がヒンジ（ヒンジ取付部ｂ）を支点に上方に盛り上がるとともに、車幅方向両側端縁が下方に垂れ下がる。なお、図１２中、ｅはドアアウターパネルの窓部に対応する開口部、ｆはドアアウターパネルのナンバープレート取付部に対応する凹部である。   That is, as shown in FIG. 12, a pair of hinge mounting portions b are provided at the upper portion of the door inner panel a with a gap in the vehicle width direction, and spaced at the vehicle body rear end upper portion in the vehicle width direction. The hinge mounting portion b is connected to a pair of hinges provided. Further, one end (upper end in FIG. 12) of the damper c is attached to each of the both sides of the rear end of the vehicle body, and the other end (lower end in FIG. 12) of the damper c is on both sides in the vehicle width direction of the door inner panel a. Attached to the edge. Therefore, in the door closed state, a repulsive force (downward pushing force) due to the contraction of the damper c acts on both side edges in the vehicle width direction of the door inner panel a. For this reason, in the midsummer when the sunlight is severe (during hot weather), the door inner panel a extends in the vehicle width direction due to thermal expansion, in addition to the repulsive force due to the contraction of the damper c. 12, the center in the vehicle width direction rises upward with the hinge (hinge mounting portion b) as a fulcrum, and both side edges in the vehicle width direction hang downward. In FIG. 12, e is an opening corresponding to the window portion of the door outer panel, and f is a recess corresponding to the number plate mounting portion of the door outer panel.

一方、特許文献１には、ドアインナーパネルに補強部材を設けてドアインナーパネルの剛性を高めるようにしたバックドアが開示されている。   On the other hand, Patent Document 1 discloses a back door in which a reinforcing member is provided on the door inner panel to increase the rigidity of the door inner panel.

特開２０１０−２６０５１９号公報（段落００１７欄、段落００１８欄、段落００１９欄、図１、図２）JP 2010-260519 A (paragraph 0017 column, paragraph 0018 column, paragraph 0019 column, FIGS. 1 and 2)

しかし、特許文献１のようにドアインナーパネルに補強部材を設けると、その分だけバックドアの重量が増加するとともに、コストアップを招来する。さりとて、補強部材を縮小すると熱変形防止が心許なくなる。   However, if a reinforcing member is provided on the door inner panel as in Patent Document 1, the weight of the back door increases and the cost increases accordingly. In the meantime, when the reinforcing member is reduced, it is difficult to prevent thermal deformation.

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、補強部材を廃止又は縮小しても樹脂製ドアインナーパネルの熱膨張による変形を防止することである。   The present invention has been made in view of this point, and an object of the present invention is to prevent deformation due to thermal expansion of the resin door inner panel even if the reinforcing member is eliminated or reduced.

上記の目的を達成するため、この発明は、ドアインナーパネルの上部を段状に形成したことを特徴とする。   In order to achieve the above object, the present invention is characterized in that the upper portion of the door inner panel is formed in a step shape.

具体的には、この発明は、一対のヒンジ取付部を車幅方向に間隔をあけて上部に有する樹脂製ドアインナーパネルと、該ドアインナーパネルに組み付けられるドアアウターパネルとからなり、車体後端上部に車幅方向に間隔をあけて設けられた一対のヒンジに上記ドアインナーパネルのヒンジ取付部が車体後端開口部を上下方向に開閉可能に連結され、一端が車体後端側部に取り付けられるとともに他端が上記ドアインナーパネルの車幅方向側端縁に取り付けられたダンパーの伸長作動により開動作が補助される一方、ドア閉状態では上記ダンパーの収縮による反発力が上記ドアインナーパネルの車幅方向側端縁に車体下方へ向いて作用している車両用バックドアを対象とし、次のような解決手段を講じた。 Specifically, the present invention comprises a resin door inner panel having a pair of hinge mounting portions at an upper portion spaced apart in the vehicle width direction, and a door outer panel assembled to the door inner panel. The hinge mounting portion of the door inner panel is connected to a pair of hinges provided at intervals on the top in the vehicle width direction so that the vehicle rear end opening can be opened and closed in the vertical direction, and one end is attached to the vehicle rear end side portion The opening operation is assisted by the extension operation of the damper attached to the vehicle inner side edge of the door inner panel while the other end is repelled by the contraction of the damper when the door is closed. The following solutions were taken for the vehicular back door acting on the vehicle width direction side edge toward the lower side of the vehicle body .

すなわち、この発明は、上記ドアインナーパネルは、上記ヒンジ取付部を含む領域で車体上下方向及び車幅方向に連続して延び、且つ車体後方に臨む第１縦面と、該第１縦面の下方で当該第１縦面と車体前後方向に間隔をあけて車体上下方向及び車幅方向に連続して延び、且つ車体後方に臨む第２縦面と、上記第１縦面と第２縦面との間で車体前後方向及び車幅方向に連続して延びこれら第１縦面及び第２縦面を全長に亘って連結する連結面とを備え、上記連結面は、車体下方に臨み、且つ上記ヒンジ取付部から車幅方向中央に向かうに従って次第に車体下方に位置していることを特徴とする。 That is, according to the present invention, the door inner panel extends continuously in the vehicle body vertical direction and the vehicle width direction in a region including the hinge mounting portion , and faces the rear of the vehicle body, and the first vertical surface of the first vertical surface. A second vertical surface that extends continuously in the vertical direction of the vehicle body and the vehicle width direction with a gap in the longitudinal direction of the vehicle body from below in the longitudinal direction of the vehicle body and faces the rear of the vehicle body, and the first vertical surface and the second vertical surface A connecting surface extending continuously in the vehicle longitudinal direction and the vehicle width direction between the first vertical surface and the second vertical surface over the entire length, the connecting surface facing below the vehicle body, and The vehicle is characterized in that it is gradually positioned below the vehicle body from the hinge mounting portion toward the center in the vehicle width direction.

上記ドアインナーパネル（3）のうち上記第２縦面（39）の下側部分には、車幅方向に延びる上縁部を有する開口部（19）が形成され、上記連結面（41）は、上記ヒンジ取付部(23)から車幅方向中央に向かうに従って上記開口部（19）の上縁部に近接していることが好ましい。An opening (19) having an upper edge extending in the vehicle width direction is formed in a lower portion of the second vertical surface (39) of the door inner panel (3), and the connecting surface (41) It is preferable that the opening (19) approaches the upper edge of the opening (19) from the hinge mounting portion (23) toward the center in the vehicle width direction.

上記連結面（41）は、上記ヒンジ取付部（23）の下方に対応する位置に最も車体上方に位置する部分を有することが好ましい。It is preferable that the connection surface (41) has a portion located at the uppermost position of the vehicle body at a position corresponding to the lower side of the hinge mounting portion (23).

この発明によれば、陽差しの厳しい真夏時（熱間時）等において、ドア閉状態になっていると、第１縦面と第２縦面との間に位置する連結面の凹形状が熱膨張によりヒンジ（ヒンジ取付部）を支点に下がろうとし、これに追従してドアインナーパネル上端縁の車幅方向中央も下がろうとし、これに伴い、ドアインナーパネルの車幅方向側端縁が上側に跳ね上がろうとする。この際、ドアインナーパネルの車幅方向側端縁には、ダンパーの収縮による反発力が作用して下方に押し出されようとしているため、この押出し力によって、上記ドアインナーパネルの車幅方向側端縁の跳ね上がりが相殺される。また、ドアインナーパネルの車幅方向側端縁のダンパーによる下方への押出し力により、ドアインナーパネル上端縁の車幅方向中央及び連結面の凹形状がヒンジ（ヒンジ取付部）を支点に上方に盛り上がり、これにより、上記下がろうとしているドアインナーパネル上端縁の車幅方向中央が上方に押し上げられ、ドアインナーパネルの上部が変形しない。しかも、ドアインナーパネルの上部を段状に形成するだけで補強部材を廃止又は縮小でき、バックドアの重量が軽減されるとともにコストダウン化が図られる。   According to the present invention, when the door is closed in midsummer when the sunlight is severe (during hot weather), the concave shape of the coupling surface located between the first vertical surface and the second vertical surface is Due to thermal expansion, the hinge (hinge mounting part) tries to go down to the fulcrum, and the center of the upper edge of the door inner panel also tries to go down along with this. The edge is about to jump upward. At this time, since the repulsive force due to the contraction of the damper acts on the edge in the vehicle width direction side edge of the door inner panel, the door inner panel has an edge in the vehicle width direction side. Edge bounce is offset. In addition, due to the downward pushing force by the damper on the side edge of the door inner panel in the vehicle width direction, the center of the upper edge of the door inner panel in the vehicle width direction and the concave shape of the connecting surface are turned upward with the hinge (hinge mounting part) as a fulcrum. As a result, the center in the vehicle width direction of the upper edge of the door inner panel that is about to be lowered is pushed upward, and the upper portion of the door inner panel is not deformed. In addition, the reinforcing member can be eliminated or reduced simply by forming the upper portion of the door inner panel in a step shape, thereby reducing the weight of the back door and reducing the cost.

実施形態１に係る車両用バックドアの斜視図である。1 is a perspective view of a vehicle back door according to Embodiment 1. FIG. 実施形態１に係る車両用バックドアの分解斜視図である。1 is an exploded perspective view of a vehicle back door according to Embodiment 1. FIG. 実施形態１におけるドアインナーパネルの正面図である。It is a front view of the door inner panel in Embodiment 1. 図３のIV−IV線における断面図である。It is sectional drawing in the IV-IV line of FIG. 図３のＶ−Ｖ線における断面図である。It is sectional drawing in the VV line | wire of FIG. 図３のVI−VI線における断面図である。It is sectional drawing in the VI-VI line of FIG. 実施形態２におけるドアインナーパネルの斜視図である。It is a perspective view of the door inner panel in Embodiment 2. 実施形態２の図４相当図である。FIG. 5 is a diagram corresponding to FIG. 4 of Embodiment 2. 実施形態２の図５相当図である。FIG. 6 is a diagram corresponding to FIG. 5 of the second embodiment. 実施形態３の図４相当図である。FIG. 5 is a diagram corresponding to FIG. 4 of Embodiment 3. 実施形態３の図５相当図である。FIG. 6 is a diagram corresponding to FIG. 5 of the third embodiment. 従来例の図３相当図である。It is a figure equivalent to FIG. 3 of a conventional example.

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.

（実施形態１）
図１及び図２は実施形態１に係る車両用バックドア１を示す。このバックドア１は、ハッチバック車の車体３１（図４及び図５参照）の後端開口部（図示せず）を上下方向に開閉するためのものである。上記バックドア１は、ドアインナーパネル３と、該ドアインナーパネル３に組み付けられるドアアウターパネル５とからなり、本例では、上記ドアインナーパネル３及びドアアウターパネル５は共に樹脂製であるが、ドアアウターパネル５は必ずしも樹脂製である必要はなく、金属製であってもよい。 (Embodiment 1)
1 and 2 show a vehicle back door 1 according to the first embodiment. The back door 1 is for opening and closing a rear end opening (not shown) of a vehicle body 31 (see FIGS. 4 and 5) of a hatchback vehicle in the vertical direction. The back door 1 includes a door inner panel 3 and a door outer panel 5 assembled to the door inner panel 3. In this example, the door inner panel 3 and the door outer panel 5 are both made of resin. The door outer panel 5 is not necessarily made of resin, and may be made of metal.

上記ドアアウターパネル５は、上下中程で上側パネル７と下側パネル９とに上下に二分割され、上記上側パネル７の上部には、車幅方向に延びる中空構造（図４及び図５参照）のリヤスポイラー部１１が車体後方に一体に突設され、該リヤスポイラー部１１の下方には、窓部１３がほぼ全体に亘って一体に形成されている。   The door outer panel 5 is vertically divided into an upper panel 7 and a lower panel 9 in the middle of the upper and lower sides, and a hollow structure extending in the vehicle width direction is formed on the upper part of the upper panel 7 (see FIGS. 4 and 5). ) Rear spoiler portion 11 is integrally projected on the rear side of the vehicle body, and a window portion 13 is integrally formed under the rear spoiler portion 11 almost entirely.

上記下側パネル９の略中央部には、ナンバープレート取付部１５が車体前方に向かって凹むように一体に形成され、該ナンバープレート取付部１５上方の下側パネル９上端縁には、延出部１７が一体に形成され、該延出部１７に上記上側パネル７の下端縁が車体後方から重なって両パネル７，９が接合されてドアアウターパネル５が構成される。   A license plate mounting portion 15 is integrally formed in a substantially central portion of the lower panel 9 so as to be recessed toward the front of the vehicle body, and is extended to an upper end edge of the lower panel 9 above the license plate mounting portion 15. A portion 17 is integrally formed, and the lower end edge of the upper panel 7 overlaps the extended portion 17 from the rear of the vehicle body to join the panels 7 and 9 to form the door outer panel 5.

一方、上記ドアインナーパネル３は一枚物であり、その上半部分には、開口部１９が上記ドアアウターパネル５の窓部１３に対応して形成され、該開口部１９の下方には、凹部２１が上記ドアアウターパネル５のナンバープレート取付部１５に対応して開口部１９が車体前方に向かって凹むように一体に形成されている。   On the other hand, the door inner panel 3 is a single piece, and an opening portion 19 is formed in the upper half portion corresponding to the window portion 13 of the door outer panel 5, and below the opening portion 19, The concave portion 21 is formed integrally with the number plate mounting portion 15 of the door outer panel 5 so that the opening portion 19 is recessed toward the front of the vehicle body.

上記ドアインナーパネル３の上部には、一対のヒンジ取付部２３（図５参照）が車幅方向に間隔をあけて形成され、車体３１後端上部に車幅方向に間隔をあけて設けられた一対のヒンジ２５（図５参照）に上記ヒンジ取付部２３がブラケット２７を介して車体３１後端開口部を上下方向に開閉可能に連結され、これにより、バックドア１がヒンジ２５を支点に上下方向に開閉するようになっている。   A pair of hinge mounting portions 23 (see FIG. 5) are formed on the upper portion of the door inner panel 3 with an interval in the vehicle width direction, and provided on the rear end upper portion of the vehicle body 31 with an interval in the vehicle width direction. The hinge mounting portion 23 is connected to a pair of hinges 25 (see FIG. 5) via a bracket 27 so that the rear end opening of the vehicle body 31 can be opened and closed in the vertical direction, whereby the back door 1 is vertically moved with the hinge 25 as a fulcrum. It opens and closes in the direction.

上記ドアインナーパネル３の下部の車幅方向中程には、ロック装置２９（図６参照）が取り付けられている。このロック装置２９は、ラッチ（図示せず）を内蔵していて、該ラッチが先端分岐部２９ａ間に出入りし、車体３１に固定されたストライカー３３に係合・離脱するようになっている。図６中、３４は車内側から車体３１を覆うトリムである。   A locking device 29 (see FIG. 6) is attached to the middle of the lower portion of the door inner panel 3 in the vehicle width direction. The lock device 29 includes a latch (not shown), and the latch enters and exits between the front end branch portions 29 a and engages and disengages from the striker 33 fixed to the vehicle body 31. In FIG. 6, 34 is a trim that covers the vehicle body 31 from the inside of the vehicle.

上記車体３１後端両側部の各々には、ダンパー３５の一端（図３で上端）が取り付けられるとともに、上記ダンパー３５の他端（図３で下端）が上記ドアインナーパネル３の車幅方向両側端縁に取り付けられている。したがって、バックドア１は、上記ダンパー３５の伸長作動により開動作が補助される一方、ドア閉状態では上記ダンパー３５の収縮による反発力（下方への押出し力）が上記ドアインナーパネル３の車幅方向両側端縁に作用している。   One end (upper end in FIG. 3) of the damper 35 is attached to each of the both sides of the rear end of the vehicle body 31, and the other end (lower end in FIG. 3) of the damper 35 is on both sides in the vehicle width direction of the door inner panel 3. Attached to the edge. Therefore, the opening operation of the back door 1 is assisted by the extension operation of the damper 35, while the repulsive force (the pushing force downward) due to the contraction of the damper 35 is the vehicle width of the door inner panel 3 in the door closed state. Acts on both edges in the direction.

上記ドアインナーパネル３は、図４〜図６に拡大して示すように、上記ヒンジ取付部２３を含む領域（上部）で車幅方向に連続して延びる第１縦面３７を備え、該第１縦面３７の下方には、第２縦面３９が上記第１縦面３７と車体後方に間隔をあけて車幅方向に連続して延びている。上記第１縦面３７の下端縁と上記第２縦面３９の上端縁との間には、連結面４１が車幅方向に連続して延び、かつ上記ヒンジ取付部２３から車幅方向中央に向かうに従ってカーブを描きながら次第に下方に位置している（図３参照）。そして、この連結面４１により、上記第１縦面３７の下端縁と上記第２縦面３９の上端縁とを全長に亘って一体に連結し、ドアインナーパネル３の上部が車幅方向全長に亘って段状に形成されている。   As shown in FIGS. 4 to 6 in an enlarged manner, the door inner panel 3 includes a first vertical surface 37 that continuously extends in the vehicle width direction in an area (upper part) including the hinge mounting portion 23, and Below the first vertical surface 37, a second vertical surface 39 extends continuously in the vehicle width direction with a space between the first vertical surface 37 and the rear of the vehicle body. A connecting surface 41 extends continuously in the vehicle width direction between the lower end edge of the first vertical surface 37 and the upper end edge of the second vertical surface 39 and extends from the hinge mounting portion 23 to the center in the vehicle width direction. It is gradually located downwards while drawing a curve as it goes (see FIG. 3). And by this connection surface 41, the lower end edge of the said 1st vertical surface 37 and the upper end edge of the said 2nd vertical surface 39 are integrally connected over a full length, and the upper part of the door inner panel 3 becomes a vehicle width direction full length. It is formed in a step shape.

このように構成された実施形態１に係るバックドア１では、ハッチバック車がドア閉状態で陽差しの厳しい真夏時（熱間時）等に屋外に放置されていると、第１縦面３７と第２縦面３９との間に位置する連結面４１の凹形状が、図３に一点鎖線Ａで示すように、熱膨張によりヒンジ２５（ヒンジ取付部２３）を支点に下がろうとし、これに追従してドアインナーパネル３上端縁の車幅方向中央も下がろうとし、これに伴い、ドアインナーパネル３の車幅方向両側端縁が上側に跳ね上がろうとする。   In the back door 1 according to the first embodiment configured as described above, when the hatchback vehicle is closed and the door is left outdoors in the midsummer (during hot weather) when the sunlight is severe, The concave shape of the connecting surface 41 located between the second vertical surface 39 attempts to lower the hinge 25 (hinge mounting portion 23) as a fulcrum by thermal expansion, as shown by a one-dot chain line A in FIG. Following this, the center in the vehicle width direction of the upper edge of the door inner panel 3 tends to fall, and accordingly, both side edges in the vehicle width direction of the door inner panel 3 try to spring upward.

この際、ドアインナーパネル３の車幅方向両側端縁には、ダンパー３５の収縮による反発力が作用して下方に押し出されようとしているため、この押出し力によって、上記ドアインナーパネル３の車幅方向両側端縁の跳ね上がりを相殺することができる。   At this time, since the repulsive force due to the contraction of the damper 35 acts on both side edges of the door inner panel 3 in the vehicle width direction, the door inner panel 3 is pushed downward by the pushing force. It is possible to cancel the jumping of both edges in the direction.

また、ドアインナーパネル３の車幅方向両側端縁のダンパー３５による下方への押出し力により、ドアインナーパネル３上端縁の車幅方向中央及び連結面４１の凹形状がヒンジ２５（ヒンジ取付部２３）を支点に上方に盛り上がり、これにより、上記下がろうとしているドアインナーパネル３上端縁の車幅方向中央が上方に押し上げられ、ドアインナーパネル３の上部を変形しないようにすることができる。   Further, due to the downward pushing force by the dampers 35 on both side edges of the door inner panel 3 in the vehicle width direction, the center of the upper edge of the door inner panel 3 in the vehicle width direction and the concave shape of the connecting surface 41 are hinges 25 (hinge mounting portions 23). ), And the center of the upper edge of the door inner panel 3 to be lowered is pushed upward, so that the upper portion of the door inner panel 3 can be prevented from being deformed.

しかも、ドアインナーパネル３の上部を段状に形成するだけで補強部材を廃止又は縮小でき、バックドア１の重量軽減及びコストダウン化を達成できる。   In addition, the reinforcing member can be eliminated or reduced simply by forming the upper portion of the door inner panel 3 in a step shape, and the weight reduction and cost reduction of the back door 1 can be achieved.

また、第２縦面３９が第１縦面３７よりも車体後方側に位置しているので、車体３１とバックドア１との間の空間（図４及び図５で一点鎖線Ｃ１で示す領域）が広くなって、車体３１における車体後端部のレイアウトの自由度を高めることができる。   Further, since the second vertical surface 39 is located on the rear side of the vehicle body relative to the first vertical surface 37, a space between the vehicle body 31 and the back door 1 (a region indicated by a one-dot chain line C1 in FIGS. 4 and 5). This increases the degree of freedom in the layout of the rear end of the vehicle body 31 in the vehicle body 31.

（実施形態２）
図７〜図９は実施形態２を示し、この実施形態２では、ドアインナーパネル３の上部の構造が実施形態１と異なるほかは、実施形態１と同様に構成されているので、異なる構成のみ説明して共通する構成は実施形態１に譲る。 (Embodiment 2)
7 to 9 show a second embodiment. In the second embodiment, the structure of the upper part of the door inner panel 3 is the same as that of the first embodiment except that the structure is different from that of the first embodiment. A common configuration will be described in the first embodiment.

すなわち、実施形態２では、実施形態１とは逆に、第２縦面３９が第１縦面３７よりも車体前方に位置している。   That is, in the second embodiment, contrary to the first embodiment, the second vertical surface 39 is located in front of the vehicle body relative to the first vertical surface 37.

したがって、実施形態２では、バックドア１のリヤスポイラー部１１の内部空間（図８及び図９で一点鎖線Ｃ２で示す領域）が広くなって、バックドア１内に収容される配線等のレイアウトの自由度を高めることができる。そのほかのドアインナーパネル３上部の変形防止、バックドア１の重量軽減、コストダウン化達成、及び生産性向上等といった効果については実施形態１と同様である。   Therefore, in the second embodiment, the internal space of the rear spoiler portion 11 of the back door 1 (the region indicated by the alternate long and short dash line C2 in FIGS. 8 and 9) is widened, and the layout of the wiring accommodated in the back door 1 is free. The degree can be increased. Other effects such as prevention of deformation of the upper portion of the door inner panel 3, reduction of the weight of the back door 1, cost reduction, and improvement of productivity are the same as those of the first embodiment.

（実施形態３）
図１０及び図１１は実施形態３を示し、この実施形態３でも、ドアインナーパネル３の上部の構造が実施形態１と異なるほかは、実施形態１と同様に構成されているので、異なる構成のみ説明して共通する構成は実施形態１に譲る。 (Embodiment 3)
10 and 11 show the third embodiment. Even in the third embodiment, the structure of the upper part of the door inner panel 3 is the same as that of the first embodiment except that the structure is different from that of the first embodiment. A common configuration will be described in the first embodiment.

すなわち、実施形態３では、第１縦面３７及び第２縦面３９の車体前後方向の位置関係は実施形態１と同じであるが、連結面４１を車体前側の傾斜面４１ａと、車体後側の水平面４１ｂとの２つの面で構成している。   That is, in the third embodiment, the positional relationship in the vehicle longitudinal direction between the first vertical surface 37 and the second vertical surface 39 is the same as that in the first embodiment, but the connection surface 41 is connected to the inclined surface 41a on the vehicle body front side and the vehicle body rear side. It is comprised by two surfaces with the horizontal surface 41b.

したがって、実施形態３では、連結面４１の車体前後方向の出入りを細かく調整することで、バックドア１のリヤスポイラー部１１の内部空間（図１０及び図１１で一点鎖線Ｃ３で示す領域）や、車体３１とバックドア１との間の空間（図４及び図５で一点鎖線Ｃ４で示す領域）を目的に応じて最適に設定できる。そのほかのドアインナーパネル３上部の変形防止、バックドア１の重量軽減、コストダウン化達成、及び生産性向上等といった効果については実施形態１と同様である。   Therefore, in the third embodiment, by finely adjusting the connecting surface 41 in the vehicle front-rear direction, the inner space of the rear spoiler portion 11 of the back door 1 (the region indicated by the one-dot chain line C3 in FIGS. 10 and 11), the vehicle body A space between the door 31 and the back door 1 (a region indicated by a one-dot chain line C4 in FIGS. 4 and 5) can be optimally set according to the purpose. Other effects such as prevention of deformation of the upper portion of the door inner panel 3, reduction of the weight of the back door 1, cost reduction, and improvement of productivity are the same as those of the first embodiment.

なお、上記の各実施形態では、連結面４１をヒンジ取付部２３から車幅方向中央に向かうに従ってカーブを描きながら次第に下方に位置させているが、連結面４１をヒンジ取付部２３から車幅方向中央に向かうに従って直線により次第に下方に位置させてもよい。   In each of the above embodiments, the connecting surface 41 is gradually positioned downward while drawing a curve from the hinge mounting portion 23 toward the center in the vehicle width direction, but the connecting surface 41 is moved from the hinge mounting portion 23 to the vehicle width direction. You may position it gradually below by a straight line toward the center.

また、上記の各実施形態では、ダンパー３５をドアインナーパネル３の車幅方向両側端縁に配置したが、いずれか片側のみの場合にも同様の効果を奏することができるものである。   Moreover, in each said embodiment, although the damper 35 was arrange | positioned at the vehicle width direction both side edge of the door inner panel 3, the same effect can be show | played also in the case of only one side.

さらに、実施形態３では、連結面４１を傾斜面４１ａと水平面４１ｂとの２面構成にしたが、上述の如き作用効果を奏することができる限り３面以上で構成してもよい。   Further, in the third embodiment, the connecting surface 41 has a two-surface configuration of the inclined surface 41a and the horizontal surface 41b. However, the connecting surface 41 may be configured by three or more surfaces as long as the above-described effects can be obtained.

この発明は、車体後端上部に一対のヒンジで上部が支持された樹脂製ドアインナーパネルを備えた車両用バックドアについて有用である。   The present invention is useful for a vehicular back door provided with a resin door inner panel whose upper portion is supported by a pair of hinges at the upper rear end of the vehicle body.

１ バックドア
３ ドアインナーパネル
５ ドアアウターパネル
２３ ヒンジ取付部
２５ ヒンジ
３１ 車体
３５ ダンパー
３７ 第１縦面
３９ 第２縦面
４１ 連結面 DESCRIPTION OF SYMBOLS 1 Back door 3 Door inner panel 5 Door outer panel 23 Hinge attachment part 25 Hinge 31 Car body 35 Damper 37 1st vertical surface 39 2nd vertical surface 41 Connection surface

Claims (3)

一対のヒンジ取付部(23)を車幅方向に間隔をあけて上部に有する樹脂製ドアインナーパネル(3)と、該ドアインナーパネル(3)に組み付けられるドアアウターパネル(5)とからなり、車体(31)後端上部に車幅方向に間隔をあけて設けられた一対のヒンジ(25)に上記ドアインナーパネル(3)のヒンジ取付部(23)が車体(31)後端開口部を上下方向に開閉可能に連結され、一端が車体(31)後端側部に取り付けられるとともに他端が上記ドアインナーパネル(3)の車幅方向側端縁に取り付けられたダンパー(35)の伸長作動により開動作が補助される一方、ドア閉状態では上記ダンパー(35)の収縮による反発力が上記ドアインナーパネル(3)の車幅方向側端縁に車体下方へ向いて作用している車両用バックドアであって、
上記ドアインナーパネル(3)は、上記ヒンジ取付部(23)を含む領域で車体上下方向及び車幅方向に連続して延び、且つ車体後方に臨む第１縦面(37)と、
該第１縦面(37)の下方で当該第１縦面(37)と車体前後方向に間隔をあけて車体上下方向及び車幅方向に連続して延び、且つ車体後方に臨む第２縦面(39)と、
上記第１縦面(37)と第２縦面(39)との間で車体前後方向及び車幅方向に連続して延びこれら第１縦面(37)及び第２縦面(39)を全長に亘って連結する連結面(41)とを備え、
上記連結面(41)は、車体下方に臨み、且つ上記ヒンジ取付部(23)から車幅方向中央に向かうに従って次第に車体下方に位置していることを特徴とする車両用バックドア。 It consists of a resin door inner panel (3) having a pair of hinge mounting portions (23) at the top with an interval in the vehicle width direction, and a door outer panel (5) assembled to the door inner panel (3). The hinge mounting portion (23) of the door inner panel (3) is connected to the pair of hinges (25) provided at the rear upper portion of the vehicle body (31) with an interval in the vehicle width direction. An extension of a damper (35) connected to the rear end side of the vehicle body (31) and having the other end attached to the vehicle width direction side edge of the door inner panel (3). While the opening operation is assisted by the operation, in the door closed state, the repulsive force due to the contraction of the damper (35) acts on the vehicle width direction side edge of the door inner panel (3) toward the vehicle body lower side. Backdoor for
The door inner panel (3) includes a first vertical surface (37) extending continuously in the vehicle body vertical direction and vehicle width direction in a region including the hinge mounting portion (23) and facing the vehicle body rear side,
Below the first vertical surface (37), a second vertical surface that extends continuously in the vehicle vertical direction and the vehicle width direction with a space in the vehicle longitudinal direction from the first vertical surface (37) and faces the vehicle rear side. (39)
The first vertical surface (37) and the second vertical surface (39) extend continuously between the first vertical surface (37) and the second vertical surface (39) in the vehicle longitudinal direction and the vehicle width direction. A connecting surface (41) for connecting over
The vehicular back door characterized in that the connection surface (41) faces the lower side of the vehicle body and is gradually positioned below the vehicle body as it goes from the hinge mounting portion (23) toward the center in the vehicle width direction. 請求項１に記載された車両用バックドアにおいて、In the vehicle back door according to claim 1,
上記ドアインナーパネル（3）のうち上記第２縦面（39）の下側部分には、車幅方向に延びる上縁部を有する開口部（19）が形成され、An opening (19) having an upper edge extending in the vehicle width direction is formed in the lower portion of the second vertical surface (39) of the door inner panel (3).
上記連結面（41）は、上記ヒンジ取付部(23)から車幅方向中央に向かうに従って上記開口部（19）の上縁部に近接しているThe connection surface (41) is closer to the upper edge of the opening (19) from the hinge mounting portion (23) toward the center in the vehicle width direction.
ことを特徴とする車両用バックドア。A vehicle back door characterized by that. 請求項１又は２に記載された車両用バックドアにおいて、In the vehicle back door according to claim 1 or 2,
上記連結面（41）は、上記ヒンジ取付部（23）の下方に対応する位置に最も車体上方に位置する部分を有するThe connection surface (41) has a portion that is located above the vehicle body at a position corresponding to the lower side of the hinge mounting portion (23).
ことを特徴とする車両用バックドア。A vehicle back door characterized by that.
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