JP2011178271A - Cowl structure of automobile - Google Patents

Cowl structure of automobile Download PDF

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JP2011178271A
JP2011178271A JP2010044223A JP2010044223A JP2011178271A JP 2011178271 A JP2011178271 A JP 2011178271A JP 2010044223 A JP2010044223 A JP 2010044223A JP 2010044223 A JP2010044223 A JP 2010044223A JP 2011178271 A JP2011178271 A JP 2011178271A
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surface portion
cowl
rear surface
wiper
beads
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JP5520081B2 (en
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Atsushi Motohashi
淳 本橋
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cowl structure of an automobile supporting a wiper unit in a simple structure, while having enhanced protection performance for pedestrians and enhanced rigidity of a whole cowl, without increasing the weight and the number of parts. <P>SOLUTION: A bottom surface portion 11, front surface portion 12, rear surface portion 13, and upper surface portion 14 configure the cowl 10 in a manner to form an open cross-section with the front side opened. The upper surface portion 14 supports the lower end portion of a windshield 5. A bent portion 15 deformable with an impact load applied from the upside is formed in the middle portion of the rear surface portion 13 in the vertical direction. A plurality of beads 16 in the vertical direction pressed so as to bulge forward or vehicle rearward are formed at a portion 13a below the bent portion 15 in the rear surface portion 13. A wiper support member 21 supporting the wiper unit 20 is attached to a part of the plurality of beads. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、フロントウィンドウの下端部を支持する自動車のカウル構造に関する。   The present invention relates to a cowl structure for an automobile that supports a lower end portion of a front window.

自動車のカウルは、歩行者保護の観点から、走行中の車両が歩行者に衝突し、歩行者がボンネットの後部に乗り上げた際に、下方へ変形して衝撃を吸収するように剛性を低下させて構成されている。しかし、カウルの剛性を低下させ過ぎると、フロントウィンドウの振動等を受けてカウルの車両前側部分が上下に振動し、ＮＶ性能（振動及び振動音を抑制する性能）が低下する。このため、例えば、特許文献１のように、補強部材をカウルの後面部の下部分に対して底面部とで三角形状の閉断面が形成されるように配設し、歩行者の衝撃荷重の効率的な吸収を図りつつ、カウルの剛性を高めている。   From the standpoint of protecting pedestrians, automobile cowls reduce rigidity so that when a running vehicle collides with a pedestrian and the pedestrian rides on the rear of the hood, it deforms downward and absorbs the impact. Configured. However, if the cowl rigidity is reduced too much, the vehicle front side portion of the cowl vibrates up and down due to vibrations of the front window and the like, and the NV performance (performance for suppressing vibration and vibration noise) decreases. For this reason, for example, as in Patent Document 1, the reinforcing member is disposed so that a triangular closed section is formed with the bottom surface portion with respect to the lower portion of the rear surface portion of the cowl. The cowl's rigidity is increased while achieving efficient absorption.

特開２００８−１００５３３号公報JP 2008-100533 A 特開２００４−１４２６４７号公報JP 2004-142647 A

しかしながら、別部材の補強パネルをカウルに配置すると、その分、部品点数が増加する。カウルの後面部の剛性を高めるために、その部分の板厚を厚くすると、カウル全体の重量が増加することになる。   However, when a reinforcing panel as a separate member is disposed on the cowl, the number of parts increases accordingly. In order to increase the rigidity of the rear surface portion of the cowl, if the thickness of the portion is increased, the weight of the entire cowl increases.

また、ワイパーユニットを支持するワイパー支持部材をカウル内に取り付ける場合には、特許文献２のように、支持剛性を得るためにワイパー支持部材を大型化してカウル内の複数箇所でワイパーユニットを支持する必要があった。   Further, when a wiper support member that supports the wiper unit is mounted in the cowl, as in Patent Document 2, the wiper support member is enlarged to obtain support rigidity, and the wiper unit is supported at a plurality of locations in the cowl. There was a need.

本発明では、部品点数及び重量を増すことなく、歩行者の保護性能及びカウル全体の剛性を向上させながら、ワイパーユニットを構造簡単に支持できる自動車のカウル構造を提供することを目的としている。   An object of the present invention is to provide an automobile cowl structure that can easily support a wiper unit while improving the protection performance of a pedestrian and the rigidity of the entire cowl without increasing the number of parts and weight.

本発明に係る自動車のカウル構造の特徴構成は、フロントウィンドウの下端部を支持するカウルを備えた自動車のカウル構造であって、底面部と、前記底面部の前縁から上方へ延出される前面部と、前記底面部の後縁から上方へ延出される後面部と、前記後面部の上縁から前方へ張り出す上面部とにより、前側を開放した開放断面を形成するように前記カウルを構成し、前記上面部で前記フロントウィンドウの下端部を支持し、前記後面部の上下方向の中間部に、上方から作用する衝撃荷重により変形可能な屈曲部を形成し、前記後面部における前記屈曲部の下方の部分に、車両前方又は車両後方に膨出するようにプレス加工された上下向きのビードを複数形成し、前記複数のビードの一部にワイパーユニットを支持するワイパー支持部材を取り付けてある点にある。   The characteristic configuration of the cowl structure of the vehicle according to the present invention is a cowl structure of a vehicle including a cowl that supports the lower end portion of the front window, and includes a bottom surface and a front surface extending upward from a front edge of the bottom surface portion. The cowl is configured to form an open cross section with the front side open by a portion, a rear surface portion extending upward from the rear edge of the bottom surface portion, and an upper surface portion projecting forward from the upper edge of the rear surface portion The lower surface portion of the front window is supported by the upper surface portion, and a bent portion that can be deformed by an impact load acting from above is formed in an intermediate portion in the vertical direction of the rear surface portion, and the bent portion in the rear surface portion A plurality of vertically oriented beads pressed so as to bulge forward or rearward of the vehicle, and a wiper support member for supporting a wiper unit on a part of the plurality of beads. It lies in the fact that is Attach.

[作用]
本発明では、後面部の上下方向の中間部に、上方から作用する衝撃荷重により変形可能な屈曲部を形成し、後面部における屈曲部の下方の部分に、車両前方又は車両後方に膨出するようにプレス加工された上下向きのビードを複数形成したので、カウルの後面部にお
ける屈曲部の下方の部分の剛性を高めることができた。したがって、歩行者との衝突により歩行者の衝撃荷重が上方から作用した際は、この後面部における屈曲部の下方の部分が変形せずに、屈曲部を折れ起点として後面部の屈曲部から上方の部分と上面部とが座屈して、歩行者の衝撃荷重を吸収する。また、後面部における屈曲部の下方の部分の剛性が高まることで、結果としてカウル全体の剛性も向上し、カウルの振動が抑制される。 [Action]
In the present invention, a bent portion that can be deformed by an impact load acting from above is formed in an intermediate portion in the vertical direction of the rear surface portion, and bulges forward or rearward of the vehicle in a portion below the bent portion in the rear surface portion. Since a plurality of vertically-beaded press-formed beads were formed in this way, the rigidity of the portion below the bent portion at the rear surface portion of the cowl could be increased. Therefore, when the impact load of the pedestrian acts from above due to the collision with the pedestrian, the lower part of the bent part in the rear surface part is not deformed, and the upper part is bent from the bent part of the rear surface part. The upper part and the upper part buckle to absorb the impact load of the pedestrian. Further, the rigidity of the lower portion of the rear surface portion of the bent portion is increased, and as a result, the rigidity of the entire cowl is also improved, and vibration of the cowl is suppressed.

また、後面部における屈曲部の下方の部分に形成された複数のビードの一部にワイパーユニットを支持するワイパー支持部材を取り付けてあるので、ビードが形成された剛性の高い部位にワイパー支持部材を固定することができ、ワイパーユニットの支持剛性を高めることができる。これにより、ワイパー支持部材を簡単な構造の小型のものにしながら、ワイパーユニットを十分な強度で支持できるようになる。   In addition, since the wiper support member that supports the wiper unit is attached to a part of the plurality of beads formed in the lower portion of the bent portion in the rear surface portion, the wiper support member is attached to the highly rigid portion where the bead is formed. The wiper unit can be fixed and the support rigidity of the wiper unit can be increased. As a result, the wiper unit can be supported with sufficient strength while the wiper support member is small in size with a simple structure.

[効果]
こうして、カウルの部品点数や重量を増すことなく、歩行者の保護機能及びカウル全体の剛性を向上させることができ、ＮＶ性能を向上させることができた。また、カウルの後面部の下方の部分におけるワイパーユニットの支持剛性が向上し、当該部分に取り付けるワイパー支持部材を小型化できるようになった。 [effect]
Thus, the pedestrian protection function and the rigidity of the entire cowl can be improved without increasing the number of parts and weight of the cowl, and the NV performance can be improved. Further, the support rigidity of the wiper unit in the lower portion of the rear surface portion of the cowl is improved, and the wiper support member attached to the portion can be downsized.

自動車の前部車体構造を示す縦断側面図Longitudinal side view showing the front body structure of an automobile 自動車のカウルの部分を示す縦断側面図であって、（ａ）は通常の状態、（ｂ）は衝撃荷重が作用した状態をそれぞれ示す。It is the vertical side view which shows the cowl part of a motor vehicle, (a) shows a normal state, (b) shows the state which the impact load acted, respectively. 自動車のカウルの内部を示す斜視図A perspective view showing the inside of a cowl of a car

以下、本発明の実施形態を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に示すように、自動車の前部には、エンジンフード１により開閉可能なエンジンルーム２が設けられており、エンジンルーム２の車両後方にはダッシュパネル３を挟んで車室４が設けられている。このように、自動車の前部車体には、エンジンルーム２と車室４とを区画するダッシュパネル３が設けられており、ダッシュパネル３の上方にフロントウィンドウ５の下端部を支持するカウル１０が配設されている。カウル１０の車両後方には、インストルメントパネル６が配設されている。   As shown in FIG. 1, an engine room 2 that can be opened and closed by an engine hood 1 is provided at the front of the automobile, and a vehicle compartment 4 is provided behind the engine room 2 with a dash panel 3 interposed therebetween. ing. As described above, the dash panel 3 that partitions the engine room 2 and the vehicle compartment 4 is provided on the front body of the automobile, and the cowl 10 that supports the lower end of the front window 5 is provided above the dash panel 3. It is arranged. An instrument panel 6 is disposed behind the cowl 10 in the vehicle.

図２（ａ）に示すように、カウル１０は、底面部１１、前面部１２、後面部１３、及び上面部１４を備えている。前面部１２は底面部１１の前縁から前方上方へ延出されており、後面部１３は底面部１１の後縁から上方へ延出されている。また、上面部１４は後面部１３の上縁から前方下方へ張り出しており、後面部１３及び底面部１１の上方を覆っている。フロントウィンドウ５は、支持部材を介して上面部１１の上面側に支持されている。こうして、カウル１０は、車両前側が開放する開放断面を形成するよう構成されている。   As shown in FIG. 2A, the cowl 10 includes a bottom surface portion 11, a front surface portion 12, a rear surface portion 13, and a top surface portion 14. The front surface portion 12 extends forward and upward from the front edge of the bottom surface portion 11, and the rear surface portion 13 extends upward from the rear edge of the bottom surface portion 11. Further, the upper surface part 14 protrudes forward and downward from the upper edge of the rear surface part 13 and covers the upper part of the rear surface part 13 and the bottom surface part 11. The front window 5 is supported on the upper surface side of the upper surface portion 11 via a support member. Thus, the cowl 10 is configured to form an open cross section that opens on the front side of the vehicle.

カウル１０は、金属板をプレス加工して製作される。カウル１０は、底面部１１、前面部１２、及び後面部１３が１枚の金属板からプレス成形されており、後面部１３の上縁部と上面部１４の後縁部とがスポット溶接等により接合されている。   The cowl 10 is manufactured by pressing a metal plate. In the cowl 10, the bottom surface portion 11, the front surface portion 12, and the rear surface portion 13 are press-formed from a single metal plate, and the upper edge portion of the rear surface portion 13 and the rear edge portion of the upper surface portion 14 are formed by spot welding or the like. It is joined.

後面部１３には、上下方向の中間部に側面視で前側にくの字状に突出した屈曲部１５が形成されており、屈曲部１５は上方から作用する衝撃荷重により変形可能に構成されており、後面部１３の折れ起点となる。後面部１３の屈曲部１５の下方の部分１３ａには、下部前面１３Ａから車両前方に膨出する上下向きの複数のビード１６がプレス加工により左右方向に等ピッチで形成されている。複数のビード１６は、後面部１３の下方の部分１３ａの下部及び上部の傾斜部１３Ｂ，１３Ｃに亘って、後述するワイパー支持部材２１用の取付面１６Ａを有する形態で形成されており、その正面視での形状は上端及び下端に円弧状部分を備えた上下向きの長円形状に形成されている。後面部１３における屈曲部１５の下方の部分１３ａの剛性がビード１６によって高められる。   The rear surface portion 13 is formed with a bent portion 15 protruding in the shape of a dogleg to the front side in a side view in the vertical direction, and the bent portion 15 is configured to be deformable by an impact load acting from above. Thus, it becomes the folding start point of the rear surface portion 13. A plurality of up and down beads 16 bulging from the lower front surface 13A to the front of the vehicle are formed in the portion 13a below the bent portion 15 of the rear surface portion 13 at equal pitches in the left-right direction by pressing. The plurality of beads 16 are formed in a form having a mounting surface 16A for a wiper support member 21, which will be described later, over a lower portion 13a and an upper inclined portion 13B, 13C of the lower portion 13a of the rear surface portion 13. The visual shape is formed in an elliptical shape with an upward and downward direction and arcuate portions at the lower and upper ends. The rigidity of a portion 13 a below the bent portion 15 in the rear surface portion 13 is increased by the bead 16.

図２（ｂ）に示すように、歩行者との衝突により歩行者の衝撃荷重が上方から作用した際は、後面部１３における屈曲部１５の下方の部分１３ａは変形し難く、屈曲部１５を折れ起点として後面部１３の屈曲部１５より上方の部分１３ｂと上面部１４とが座屈して、歩行者の衝撃荷重を吸収する。また、後面部１３における屈曲部１５の下方の部分１３ａの剛性が高まることで、結果としてカウル１０全体の剛性も向上してカウルの振動が抑制され、ＮＶ性能が向上する。   As shown in FIG. 2 (b), when the impact load of the pedestrian is applied from above due to the collision with the pedestrian, the portion 13a below the bent portion 15 in the rear surface portion 13 is hardly deformed, and the bent portion 15 is As a fold starting point, the portion 13b above the bent portion 15 of the rear surface portion 13 and the upper surface portion 14 buckle to absorb the impact load of the pedestrian. In addition, the rigidity of the portion 13a below the bent portion 15 in the rear surface portion 13 is increased. As a result, the rigidity of the entire cowl 10 is also improved, and vibration of the cowl is suppressed, so that NV performance is improved.

カウル１０の後面部１３における屈曲部１４の下方の部分１３ａの複数のビード１６の一部に、ワイパーユニット２０を支持するワイパー支持部材２１を取り付ける。このようにビード１６が形成されて剛性の高い部位にワイパー支持部材２１を固定することにより、ワイパーユニット２０の支持剛性を高めることができる。ワイパー支持部材２１を固定する部位におけるワイパーユニット２０の支持剛性が高いと、ワイパー支持部材２１を簡単な構造の小型のものに構成してもワイパーユニット２０を十分な強度で支持できるようになる。   A wiper support member 21 that supports the wiper unit 20 is attached to a part of the plurality of beads 16 in a portion 13 a below the bent portion 14 in the rear surface portion 13 of the cowl 10. Thus, the support rigidity of the wiper unit 20 can be improved by fixing the wiper support member 21 to the portion having the bead 16 formed and having a high rigidity. When the support rigidity of the wiper unit 20 at the portion where the wiper support member 21 is fixed is high, the wiper unit 20 can be supported with sufficient strength even if the wiper support member 21 is configured to be a small and simple structure.

[別実施形態]
（１）後面部１３の下方の部分１３ａは、ビード１６が形成されている部分だけでなく、ビード１６が形成されていない部分も、結果的にビード１６によって剛性は高められている。したがって、ワイパー支持部材２１を、下方の部分１３ａの複数のビード１６の間の下部前面１３Ａに取り付けてもよい。 [Another embodiment]
(1) As for the part 13a below the rear surface part 13, not only the part in which the bead 16 is formed but also the part in which the bead 16 is not formed is increased in rigidity by the bead 16 as a result. Therefore, the wiper support member 21 may be attached to the lower front surface 13A between the plurality of beads 16 of the lower portion 13a.

（２）上下向きのビード１６は、下部後面から車両後方に膨出するように形成されたものであってもよい。この場合、ビード１６が形成されている部分にワイパー支持部材２１を取り付けてもよく、ビード１６が形成されていない下部前面１３Ａにワイパー支持部材２１を取り付けてもよい。 (2) The vertically oriented bead 16 may be formed so as to bulge rearward from the lower rear surface. In this case, the wiper support member 21 may be attached to the portion where the bead 16 is formed, or the wiper support member 21 may be attached to the lower front surface 13A where the bead 16 is not formed.

（３）上記の実施形態では、複数のビード１６の正面視の形状を長円形状に形成した例を示したが、複数のビード１６の正面視での形状を縦長の長方形状や台形状等に形成してもよい。 (3) In the above embodiment, an example in which the shape of the plurality of beads 16 in the front view is formed in an oval shape is shown. However, the shape of the plurality of beads 16 in the front view is a vertically long rectangular shape, a trapezoidal shape, or the like. You may form in.

（４）上記の実施形態では、カウル１０は、底面部１１、前面部１２及び後面部１３を１つの板状物で構成し、後面部１３と上面部１４とを接合して構成したが、カウル１０の構成は上記の実施形態に限定されるものでなく、種々に設計変更自在である。したがって、カウル１０は、例えば、底面部１１及び前面部１２と、後面部１３及び上面部１４とをそれぞれ１つの板状物で成形した後に接合する構成でもよいし、底面部１１、前面部１２、後面部１３、及び上面部１４を全て個別に成形した後に接合する構成でもよい。 (4) In the above embodiment, the cowl 10 is configured by forming the bottom surface portion 11, the front surface portion 12, and the rear surface portion 13 from one plate-like material, and joining the rear surface portion 13 and the upper surface portion 14, The configuration of the cowl 10 is not limited to the above embodiment, and various design changes can be made. Therefore, the cowl 10 may have a configuration in which, for example, the bottom surface portion 11 and the front surface portion 12 and the rear surface portion 13 and the top surface portion 14 are respectively molded after being formed from one plate-like material, and the bottom surface portion 11 and the front surface portion 12 are joined. The rear surface portion 13 and the upper surface portion 14 may be individually molded and then joined.

本発明に係る自動車のカウル構造は、歩行者の保護機能及び、ＮＶ性能の向上を必要とする各種車両に幅広く利用することができる。   The cowl structure of an automobile according to the present invention can be widely used for various vehicles that require improvement of a pedestrian protection function and NV performance.

１ エンジンフード
２ エンジンルーム
３ ダッシュパネル
４ 車室
５ フロントウィンドウ
１０ カウル
１１ 底面部
１２ 前面部
１３ 後面部
１３ａ 下方の部分
１３ｂ 上方の部分
１４ 上面部
１５ 屈曲部
１６ ビード
２０ ワイパーユニット
２１ ワイパー支持部材 DESCRIPTION OF SYMBOLS 1 Engine hood 2 Engine room 3 Dash panel 4 Cabin 5 Front window 10 Cowl 11 Bottom part 12 Front part 13 Rear part 13a Lower part 13b Upper part 14 Upper part 15 Bending part 16 Bead 20 Wiper unit 21 Wiper support member

Claims (1)

フロントウィンドウの下端部を支持するカウルを備えた自動車のカウル構造であって、
底面部と、前記底面部の前縁から上方へ延出される前面部と、前記底面部の後縁から上方へ延出される後面部と、前記後面部の上縁から前方へ張り出す上面部とにより、前側を開放した開放断面を形成するように前記カウルを構成し、
前記上面部で前記フロントウィンドウの下端部を支持し、
前記後面部の上下方向の中間部に、上方から作用する衝撃荷重により変形可能な屈曲部を形成し、
前記後面部における前記屈曲部の下方の部分に、車両前方又は車両後方に膨出するようにプレス加工された上下向きのビードを複数形成し、
前記複数のビードの一部にワイパーユニットを支持するワイパー支持部材を取り付けてある自動車のカウル構造。 A cowl structure for an automobile having a cowl for supporting a lower end portion of a front window,
A bottom surface portion, a front surface portion extending upward from a front edge of the bottom surface portion, a rear surface portion extending upward from a rear edge of the bottom surface portion, and an upper surface portion projecting forward from the upper edge of the rear surface portion; By configuring the cowl so as to form an open cross section with the front side open,
Support the lower end of the front window at the upper surface,
Forming a bent portion that can be deformed by an impact load acting from above on an intermediate portion in the vertical direction of the rear surface portion,
In the lower part of the bent portion in the rear surface portion, a plurality of vertically oriented beads that are pressed so as to bulge forward or rearward of the vehicle are formed,
An automotive cowl structure in which a wiper support member for supporting a wiper unit is attached to a part of the plurality of beads.
JP2010044223A 2010-03-01 2010-03-01 Car cowl structure Active JP5520081B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014080168A (en) * 2012-10-18 2014-05-08 Toyota Motor Corp Cowl structure
JPWO2015053093A1 (en) * 2013-10-10 2017-03-09 日本プラスト株式会社 Cowl top cover

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005219626A (en) * 2004-02-05 2005-08-18 Nissan Motor Co Ltd Cowl structure of vehicle body
JP2010023536A (en) * 2008-07-15 2010-02-04 Mitsubishi Motors Corp Cowl top structure of vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005219626A (en) * 2004-02-05 2005-08-18 Nissan Motor Co Ltd Cowl structure of vehicle body
JP2010023536A (en) * 2008-07-15 2010-02-04 Mitsubishi Motors Corp Cowl top structure of vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014080168A (en) * 2012-10-18 2014-05-08 Toyota Motor Corp Cowl structure
JPWO2015053093A1 (en) * 2013-10-10 2017-03-09 日本プラスト株式会社 Cowl top cover

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