JP2006062520A - Cowl box structure of automobile - Google Patents

Cowl box structure of automobile Download PDF

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JP2006062520A
JP2006062520A JP2004247219A JP2004247219A JP2006062520A JP 2006062520 A JP2006062520 A JP 2006062520A JP 2004247219 A JP2004247219 A JP 2004247219A JP 2004247219 A JP2004247219 A JP 2004247219A JP 2006062520 A JP2006062520 A JP 2006062520A
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cowl box
wall portion
front wall
connecting member
hood
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JP2004247219A
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Yasumasa Horimizu
康正 堀水
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Nihon Plast Co Ltd
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Nihon Plast Co Ltd
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Priority to JP2004247219A priority Critical patent/JP2006062520A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide cowl box structure of an automobile which securely prevents a front wall part from falling to the front in normal times, and allows a hood to move toward a lower position by the falling of the front wall part to the front when an excessive load from above is imposed on the hood. <P>SOLUTION: Since a connecting member 9 has rigidity necessary for maintaining a shape of the cowl box 3 in normal times, the rigidity of the cowl box 3 in normal times is secured. Even when there is an accumulation of a foreign substance within the cowl box 3, the front wall part 4 does not fall down, thus the sealing condition between the front wall part 4 and the hood 1 is maintained. Furthermore, when the excessive load is imposed on the front wall part 4 from above by the hood 1, the connecting member 9 is expanded and deformed. Thus, the hood 1 can move toward a lower position tilting the front wall part 4, and impact energy can be securely absorbed. Furthermore, since the connecting member 9 is bellow-shaped, stable reaction force can be generated in the expansion/deformation process of the connecting member 9, thus the impact energy can be sufficiently absorbed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、自動車のカウルボックス構造に関するものである。   The present invention relates to a cowl box structure of an automobile.

フロントウィンドウパネルの前方には、上部が開放した断面形状を有するカウルボックスが車幅方向に沿って形成されている。このカウルボックスは、車体剛性の確保と共に、雨水を車室外に排出して外気だけを車室内に導入する機能を有する。カウルボックスは、少なくとも前壁部と底壁部と後壁部とから構成され、前壁部の上端は、エンジンルームの熱気や臭気がカウルボックスを経て車室内に侵入しないように、シール部を介してフードの下面に当接している。   A cowl box having a cross-sectional shape with an open top is formed along the vehicle width direction in front of the front window panel. The cowl box has a function of ensuring the rigidity of the vehicle body and discharging rainwater to the outside of the passenger compartment to introduce only outside air into the passenger compartment. The cowl box is composed of at least a front wall part, a bottom wall part, and a rear wall part, and the upper end of the front wall part is provided with a seal part so that hot air and odor of the engine room do not enter the vehicle compartment through the cowl box. Via the bottom surface of the hood.

また、カウルボックスの前壁部と後壁部とは、複数のリブ状の連結部材により連結されている。このリブ状の連結部材は、前壁部の前方への倒れを防止するために形成されている。すなわち、カウルボックス内に異物(枯葉、雪など)が溜まり、それがワイパアームにより更に前側へ押されると、前壁部が前側へ倒れて、上端のシール部とフードとの間に隙間が生じるおそれがある。隙間が生じると、そこからエンジンルーム内の熱気や臭いが車室内に侵入してしまうおそれがある(例えば、特許文献1参照)。
特許第3478099号
Further, the front wall portion and the rear wall portion of the cowl box are coupled by a plurality of rib-shaped coupling members. The rib-shaped connecting member is formed to prevent the front wall portion from falling forward. That is, if foreign matter (dead leaves, snow, etc.) accumulates in the cowl box and is pushed further forward by the wiper arm, the front wall may fall forward, creating a gap between the top seal and the hood. There is. When the gap is generated, there is a risk that hot air or odor in the engine room may enter the vehicle compartment from there (see, for example, Patent Document 1).
Japanese Patent No. 3478099

しかしながら、このような従来の技術にあっては、カウルボックスの前壁部と後壁部をリブ状の連結部材により連結したため、前壁部の剛性が向上して、前壁部の前方への倒れは防止されるものの、前壁部の剛性があまり高すぎると、跳ね飛ばされた歩行者がフード上に落下するなどして生じた下向きへの過大荷重により、フードが前壁部を前側へ倒しながら下方へ移動することができなくなり、衝撃エネルギーの十分な吸収ができなくなる。   However, in such a conventional technique, since the front wall portion and the rear wall portion of the cowl box are connected by the rib-like connecting member, the rigidity of the front wall portion is improved, and the front wall portion is moved forward. Although falling is prevented, if the rigidity of the front wall is too high, the hood will move the front wall to the front due to an excessive downward load caused by a pedestrian who has jumped off falling on the hood. It is impossible to move downward while defeating, and it is impossible to sufficiently absorb impact energy.

本発明は、このような従来の技術に着目してなされたものであり、前壁部の通常時における前側への倒れは確実に防止しつつ、上側からの過大荷重をフードが受けた際には前壁部が前側へ倒れてフードの下方移動を許容する自動車のカウルボックス構造を提供するものである。   The present invention has been made paying attention to such a conventional technique, and when the hood receives an excessive load from the upper side while reliably preventing the front wall portion from falling forward during normal times. Provides a cowl box structure for an automobile in which the front wall portion falls forward and allows the hood to move downward.

請求項1記載の発明は、フロントウィンドウパネルの前方位置に、少なくとも前壁部と底壁部と後壁部とから成るカウルボックスが車幅方向に沿って形成され、該カウルボックスの内部に前壁部と後壁部とを前後方向で連結する連結部材が車幅方向に沿って複数形成され、前壁部の上端がシール部を介してフードの下面に当接している自動車のカウルボックス構造であって、前記連結部材は、通常時のカウルボックスの保形に必要な剛性を有し、衝撃による過大荷重により伸張変形可能な形状であることを特徴とする。   According to the first aspect of the present invention, a cowl box including at least a front wall portion, a bottom wall portion, and a rear wall portion is formed along the vehicle width direction at a front position of the front window panel. A cowl box structure for an automobile in which a plurality of connecting members for connecting the wall portion and the rear wall portion in the front-rear direction are formed along the vehicle width direction, and the upper end of the front wall portion is in contact with the lower surface of the hood via the seal portion The connecting member is characterized in that it has a rigidity necessary for shape retention of the cowl box in a normal state and has a shape that can be extended and deformed by an excessive load due to an impact.

請求項2記載の発明は、連結部材は、ジャバラ形状であることを特徴とする。   The invention according to claim 2 is characterized in that the connecting member has a bellows shape.

請求項3記載の発明は、連結部材は、カウルボックスの底壁部にも結合されていることを特徴とする。   The invention according to claim 3 is characterized in that the connecting member is also coupled to the bottom wall portion of the cowl box.

請求項4記載の発明は、連結部材とカウルボックスとが樹脂一体成形品であることを特徴とする。   The invention according to claim 4 is characterized in that the connecting member and the cowl box are resin-integrated molded products.

請求項1記載の発明によれば、連結部材が通常時のカウルボックスの保形に必要な剛性を有しているため、カウルボックスの通常時における剛性は確保され、カウルボックス内に異物(枯葉、雪など)が溜まっても、前壁部が前側へ倒れることはなく、前壁部とフードとのシール状態は保持される。また、上側からフードに加わった下側への衝撃による過大荷重が前壁部に加わった際には、連結部材が伸張方向に変形するため、フードは前壁部を前側へ倒しながら下方へ移動し、衝撃エネルギーを確実に吸収することができる。   According to the first aspect of the present invention, since the connecting member has the rigidity necessary for shape retention of the cowl box at the normal time, the rigidity of the cowl box at the normal time is secured, and the foreign matter (dead leaves) is contained in the cowl box. Even if snow accumulates, the front wall portion does not fall forward, and the seal state between the front wall portion and the hood is maintained. In addition, when an excessive load is applied to the front wall due to a downward impact applied to the hood from the upper side, the connecting member deforms in the extension direction, so the hood moves downward while tilting the front wall toward the front side. Thus, the impact energy can be absorbed reliably.

請求項2記載の発明によれば、連結部材がジャバラ形状のため、連結部材が伸張変形する過程において安定した反力を発生させることができ、衝撃エネルギーを十分に吸収することができる。   According to the second aspect of the present invention, since the connecting member has a bellows shape, a stable reaction force can be generated in the process of expansion and deformation of the connecting member, and impact energy can be sufficiently absorbed.

請求項3記載の発明によれば、連結部材がカウルボックスの底壁部にも結合されているため、カウルボックスの全体剛性の向上を図ることができる。   According to the invention described in claim 3, since the connecting member is also coupled to the bottom wall portion of the cowl box, the overall rigidity of the cowl box can be improved.

請求項4記載の発明によれば、連結部材とカウルボックスとが樹脂一体成形品のため、連結部材の形成が容易で、軽量化を図ることができる。   According to invention of Claim 4, since a connection member and a cowl box are resin integral molding products, formation of a connection member is easy and weight reduction can be achieved.

前壁部の通常時における前側への倒れは確実に防止しつつ、上側からの過大荷重をフードが受けた際には前壁部が前側へ倒れてフードの下方移動を許容する自動車のカウルボックス構造を提供するという目的を、フロントウィンドウパネルの前方位置に、少なくとも前壁部と底壁部と後壁部とから成るカウルボックスが車幅方向に沿って形成され、該カウルボックスの内部に前壁部と後壁部とを前後方向で連結する連結部材が車幅方向に沿って複数形成され、前壁部の上端がシール部を介してフードの下面に当接している自動車のカウルボックス構造であって、前記連結部材は、通常時のカウルボックスの保形に必要な剛性を有し、衝撃による過大荷重により伸張変形可能な形状にしたことで、実現した。以下、本発明の実施例を図面に基づいて説明する。   An automobile cowl box that reliably prevents the front wall from collapsing to the front side during normal times, and allows the hood to move down when the hood receives an overload from the upper side. For the purpose of providing a structure, a cowl box including at least a front wall portion, a bottom wall portion, and a rear wall portion is formed along the vehicle width direction at a front position of the front window panel, and is disposed in the front of the cowl box. A cowl box structure for an automobile in which a plurality of connecting members for connecting the wall portion and the rear wall portion in the front-rear direction are formed along the vehicle width direction, and the upper end of the front wall portion is in contact with the lower surface of the hood via the seal portion The connecting member has a rigidity necessary for shape retention of the cowl box in a normal state, and is realized by a shape that can be extended and deformed by an excessive load due to an impact. Embodiments of the present invention will be described below with reference to the drawings.

図1〜図5は、本発明の一実施例を示す図である。エンジンルームEの上方には、前開きタイプのフード1が配されている。フロントウィンドウパネル2の前方には、上部開放の断面形状を有するカウルボックス3が車幅方向に沿って形成されている。カウルボックス3は合成樹脂製で、基本的に、前方へ若干傾斜した前壁部4と、ダッシュロアDの上端に結合された底壁部5と、後壁部6と、図示せぬワイパが支持される上面部7とを備えている。   1-5 is a figure which shows one Example of this invention. A front-opening type hood 1 is disposed above the engine room E. A cowl box 3 having a cross-sectional shape with an open top is formed in front of the front window panel 2 along the vehicle width direction. The cowl box 3 is made of synthetic resin, and basically includes a front wall portion 4 slightly inclined forward, a bottom wall portion 5 coupled to the upper end of the dash lower D, a rear wall portion 6, and a wiper (not shown). And an upper surface portion 7 to be supported.

前壁部4の上端にはシール部8が取付けられ、シール部8はフード1の下面に当接している。従って、この前壁部4とシール部8により、カウルボックス3とエンジンルームEとを遮蔽し、エンジンルームE内の熱気や臭気がカウルボックス3内に侵入するのを防止している。   A seal portion 8 is attached to the upper end of the front wall portion 4, and the seal portion 8 is in contact with the lower surface of the hood 1. Therefore, the cowl box 3 and the engine room E are shielded by the front wall part 4 and the seal part 8, and the hot air and odor in the engine room E are prevented from entering the cowl box 3.

そして、このカウルボックス3の内部には、車幅方向に複数の連結部材9が形成されている。連結部材9は、前後方向に伸張可能な湾曲波形のジャバラ形状で、前後が前壁部4及び後壁部6に一体に形成され、下端が底壁部5に一体に形成されている。即ち、この連結部材9はカウルボックス3を射出成形する際に一体成形されたものである。樹脂一体成形のため、連結部材9の形成が容易で、カウルボックス3全体の軽量化を図ることができる。   A plurality of connecting members 9 are formed in the cowl box 3 in the vehicle width direction. The connecting member 9 has a bellows shape of a curved waveform that can be extended in the front-rear direction, the front and rear are formed integrally with the front wall portion 4 and the rear wall portion 6, and the lower end is formed integrally with the bottom wall portion 5. That is, the connecting member 9 is integrally formed when the cowl box 3 is injection molded. Since the resin is integrally formed, the connection member 9 can be easily formed, and the weight of the cowl box 3 as a whole can be reduced.

この連結部材9は、ジャバラ形状ではあるが、通常時におけるカウルボックス3の保形に必要な剛性を有しているため、カウルボックス3内に雪などの異物が溜まり、それが図示せぬワイパアームにより間接的に前側に押されて(フロントウィンドウパネル2の雪が順繰りに前側に送られることより)、前壁部4に対して前向きの通常荷重F1(図2参照)が加わっても、前壁部4が前側に倒れることはない。従って、前壁部4の上端のシール部8の位置は変わらず、シール部8によるフード1とのシール状態は維持され、シール部8とフード1との間に隙間が生じない。また、連結部材9は底壁部5にも結合されているため、カウルボックス3の全体剛性の向上を図ることができ、カウルボックス3のねじれ剛性等も高めることができる。   Although the connecting member 9 has a bellows shape, the connecting member 9 has rigidity necessary for shape retention of the cowl box 3 in a normal state. Therefore, foreign matters such as snow accumulate in the cowl box 3, and a wiper arm (not shown) Even if a forward normal load F1 (see FIG. 2) is applied to the front wall portion 4 even if the front wall panel 4 is pushed to the front side indirectly (the snow in the front window panel 2 is sent forward in order), the front wall Part 4 does not fall forward. Therefore, the position of the seal portion 8 at the upper end of the front wall portion 4 does not change, the sealing state between the seal portion 8 and the hood 1 is maintained, and no gap is generated between the seal portion 8 and the hood 1. Further, since the connecting member 9 is also coupled to the bottom wall portion 5, the overall rigidity of the cowl box 3 can be improved, and the torsional rigidity and the like of the cowl box 3 can be increased.

そして、歩行者を跳ね飛ばすなどして、フード1上に落下した歩行者などによるフード1への下向きの過大荷重F2(図3参照)が加わった際には、前壁部4が前側へ傾斜していることもあり、その下向きの過大荷重F2は前壁部4に対して前向きの過大荷重F3として作用する。この時、ジャバラ状の連結部材9は、前向きの過大荷重F3により前後方向に伸張変形可能なため、前壁部4の前方への倒れと、フード1の下方移動を許容する。そのため、前記下向きの過大荷重F2による衝撃エネルギーを確実に吸収して歩行者への損傷を可及的に少なくすることができる。   When a downward excessive load F2 (see FIG. 3) is applied to the hood 1 by a pedestrian who has fallen on the hood 1 by jumping off the pedestrian or the like, the front wall 4 is inclined forward. The downward excessive load F2 acts as a forward excessive load F3 on the front wall portion 4. At this time, the bellows-like connecting member 9 can be extended and deformed in the front-rear direction by a forward excessive load F3, and therefore allows the front wall portion 4 to fall forward and the hood 1 to move downward. Therefore, it is possible to reliably absorb the impact energy caused by the downward excessive load F2 and reduce the damage to the pedestrian as much as possible.

しかも、ジャバラ形状の連結部材9は、前壁部4が前方へ倒れる際に、途中で破断したりすることなく、粘り強く伸張変形するため、連結部材9の伸張過程において安定した反力を発生させることができ、衝撃エネルギーを十分に吸収することができる。   Moreover, since the bellows-shaped connecting member 9 is tenaciously stretched and deformed without breaking in the middle when the front wall portion 4 falls forward, a stable reaction force is generated in the extending process of the connecting member 9. And can sufficiently absorb impact energy.

尚、以上の実施例では、湾曲波形状のジャバラ形状を有する連結部材9を例にしたが、図6に示すような直線ジグザグ状のジャバラ形状をした連結部材10を採用しても良い。   In the above embodiment, the connecting member 9 having a bellows shape having a curved wave shape is taken as an example, but a connecting member 10 having a bellows shape having a linear zigzag shape as shown in FIG. 6 may be adopted.

連結部材の形状としては、所定の反力を発生させながら前後方向に伸張する形状であれば、ジャバラ形状でなくても良い。また、カウルボックス3の上部は、空気導入口を有するカバーで覆われていても良い。更に、カウルボックス3や連結部材9、10は金属製でも良く、複数の部品から組み立てられた構造でも良い。   The shape of the connecting member may not be a bellows shape as long as it is a shape that extends in the front-rear direction while generating a predetermined reaction force. Further, the upper portion of the cowl box 3 may be covered with a cover having an air inlet. Further, the cowl box 3 and the connecting members 9 and 10 may be made of metal or may be a structure assembled from a plurality of parts.

本発明の一実施例に係るカウルボックス構造を示す斜視図。The perspective view which shows the cowl box structure which concerns on one Example of this invention. 図1の通常時のカウルボックス構造を示す縦断面図。The longitudinal cross-sectional view which shows the cowl box structure of the normal time of FIG. 図1の衝撃時のカウルボックス構造を示す縦断面図。The longitudinal cross-sectional view which shows the cowl box structure at the time of the impact of FIG. 図1又は図2における通常時の連結部材を示す横断面図。The cross-sectional view which shows the connection member of the normal time in FIG. 図4の連結部材が伸張した状態を示す横断面図。The cross-sectional view which shows the state which the connection member of FIG. 4 extended | stretched. 図4の連結部材の変形例を示す横断面図。FIG. 5 is a cross-sectional view showing a modification of the connecting member in FIG. 4.

符号の説明Explanation of symbols

1 フード
2 フロントウィンドウパネル
3 カウルボックス
4 前壁部
5 底壁部
6 後壁部
7 上面部
8 シール部
9、10 連結部材
D ダッシュロア
E エンジンルーム
F1 前向きの通常荷重
F2 下向き過大荷重
F3 前向きの過大荷重
DESCRIPTION OF SYMBOLS 1 Hood 2 Front window panel 3 Cowl box 4 Front wall part 5 Bottom wall part 6 Rear wall part 7 Upper surface part 8 Seal part 9, 10 Connecting member D Dash lower E Engine room F1 Forward normal load F2 Downward excessive load F3 Forward Overload

Claims (4)

フロントウィンドウパネルの前方位置に、少なくとも前壁部と底壁部と後壁部とから成るカウルボックスが車幅方向に沿って形成され、該カウルボックスの内部に前壁部と後壁部を前後方向で連結する連結部材が車幅方向に沿って複数形成され、前壁部の上端がシール部を介してフードの下面に当接している自動車のカウルボックス構造であって、
前記連結部材は、通常時のカウルボックスの保形に必要な剛性を有し、衝撃による過大荷重により伸張変形可能な形状であることを特徴とする自動車のカウルボックス構造。
A cowl box including at least a front wall portion, a bottom wall portion, and a rear wall portion is formed along the vehicle width direction at a front position of the front window panel, and the front wall portion and the rear wall portion are disposed in the front and rear sides of the cowl box. A vehicle cowl box structure in which a plurality of connecting members connected in the direction are formed along the vehicle width direction, and the upper end of the front wall portion is in contact with the lower surface of the hood via the seal portion,
The automobile cowl box structure is characterized in that the connecting member has a rigidity necessary for shape retention of the cowl box in a normal state and has a shape that can be extended and deformed by an excessive load caused by an impact.
請求項1記載の自動車のカウルボックス構造であって、
前記連結部材は、ジャバラ形状であることを特徴とする自動車のカウルボックス構造。
A cowl box structure for an automobile according to claim 1,
The connecting member has a bellows shape.
請求項1又は請求項2記載の自動車のカウルボックス構造であって、
前記連結部材は、前記カウルボックスの底壁部にも結合されていることを特徴とする自動車のカウルボックス構造。
A cowl box structure for an automobile according to claim 1 or claim 2,
The cowl box structure for an automobile, wherein the connecting member is also coupled to a bottom wall portion of the cowl box.
請求項1〜3のいずれか1項に記載の自動車のカウルボックス構造であって、
前記連結部材とカウルボックスとが、樹脂一体成形品であることを特徴とする自動車のカウルボックス構造。
It is a cowl box structure of a car given in any 1 paragraph of Claims 1-3,
A cowl box structure for an automobile, wherein the connecting member and the cowl box are a resin integrated molded product.
JP2004247219A 2004-08-26 2004-08-26 Cowl box structure of automobile Pending JP2006062520A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008155818A (en) * 2006-12-25 2008-07-10 Mitsubishi Motors Corp Deck garnish
JP2010095166A (en) * 2008-10-17 2010-04-30 Daihatsu Motor Co Ltd Impact force absorption structure of cowl louver for vehicle
WO2010073672A1 (en) * 2008-12-26 2010-07-01 日東電工株式会社 Shield plate and vehicle structure provided with the shield plate
JP2013060120A (en) * 2011-09-14 2013-04-04 Toyota Motor Corp Cowl louver
FR3020599A1 (en) * 2014-05-05 2015-11-06 Renault Sas LATERAL CLOSURE ELEMENT FOR WATER BOX, CORRESPONDING WATER BOX AND VEHICLE THUS EQUIPPED

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008155818A (en) * 2006-12-25 2008-07-10 Mitsubishi Motors Corp Deck garnish
JP2010095166A (en) * 2008-10-17 2010-04-30 Daihatsu Motor Co Ltd Impact force absorption structure of cowl louver for vehicle
WO2010073672A1 (en) * 2008-12-26 2010-07-01 日東電工株式会社 Shield plate and vehicle structure provided with the shield plate
EP2371679A1 (en) * 2008-12-26 2011-10-05 Nitto Denko Corporation Shield plate and vehicle structure provided with the shield plate
EP2371679A4 (en) * 2008-12-26 2012-07-11 Nitto Denko Corp Shield plate and vehicle structure provided with the shield plate
JP2013060120A (en) * 2011-09-14 2013-04-04 Toyota Motor Corp Cowl louver
FR3020599A1 (en) * 2014-05-05 2015-11-06 Renault Sas LATERAL CLOSURE ELEMENT FOR WATER BOX, CORRESPONDING WATER BOX AND VEHICLE THUS EQUIPPED

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