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JP4056801B2 - Airbag device for vehicle - Google Patents
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JP4056801B2 - Airbag device for vehicle - Google Patents

Airbag device for vehicle Download PDF

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Publication number
JP4056801B2
JP4056801B2 JP2002174920A JP2002174920A JP4056801B2 JP 4056801 B2 JP4056801 B2 JP 4056801B2 JP 2002174920 A JP2002174920 A JP 2002174920A JP 2002174920 A JP2002174920 A JP 2002174920A JP 4056801 B2 JP4056801 B2 JP 4056801B2
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JP
Japan
Prior art keywords
airbag
trim
vehicle
engagement piece
end portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2002174920A
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Japanese (ja)
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JP2004017784A (en
Inventor
和彦 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kasai Kogyo Co Ltd
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Kasai Kogyo Co Ltd
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Filing date
Publication date
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Priority to JP2002174920A priority Critical patent/JP4056801B2/en
Publication of JP2004017784A publication Critical patent/JP2004017784A/en
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Publication of JP4056801B2 publication Critical patent/JP4056801B2/en
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  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Air Bags (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、車体の上部から下方へ向けてカーテン状に展開する車両用のエアバッグ装置に関するものである。
【0002】
【従来の技術】
自動車の車体上部にはサイドルーフレールが形成され、そのサイドルーフレールに折り畳み状態のエアバッグが設置されている(類似技術として、特開2002−114124号公報参照)。この折り畳み状態のエアバッグは前席位置から後席位置にかけて設置され、後端部はリヤピラーに沿って下方へ湾曲している。
【0003】
そして、車体の上部に位置する部分のエアバッグの大部分は、ヘッドライニングにて車内側から覆われ、下方へ湾曲している後端部は、リヤピラーに対応するトリムにて車内側から覆われている。特に、トリムの前端部には車外側へ突出する係合片が形成され、該係合片がリヤピラーの前端に固定されたロックピラーの係合孔に係合している。
【0004】
車両の側突時には、エアバッグが膨脹して、ヘッドライニングの下端部及びトリムの前端部を押し開く。トリムの前端部は、エアバッグの膨脹力により係合片が破壊されて車内側に開く。そして、車内側に押し開かれたヘッドライニングの下端部及びトリムの前端部から、エアバッグが下方へ向けてカーテン状に展開し、乗員を保護するようになっている。
【0005】
【発明が解決しようとする課題】
しかしながら、このような従来の技術にあっては、トリムの前端部に形成された係合片が車外側へ突出した状態で、エアバッグの展開方向と直交しているため、この係合片をエアバッグの膨脹力により破壊しなければ、トリムの前端部の係合状態を解除して車室内側へ開くことができなかった。そのため、係合片を破壊するだけの大きな膨脹力を得るために大型のインフレータが必要となり、車体重量の増加を招いていた。
【0006】
この発明は、このような従来の技術に着目してなされたものであり、係合片を破壊せずにトリムの前端部を開くことができる車両用のエアバッグ装置を提供するものである。
【0007】
【課題を解決するための手段】
請求項1に記載の発明は、折り畳み状態のエアバッグを車体上部に前後方向に沿って設置すると共に、該エアバッグの後端部を下方へ湾曲させた状態とし、該エアバッグの後端部を車内側から取付けたトリムで覆うと共に、該トリムの前端部に形成した係合片を、車体側の対応部に形成された係合孔に係合させ、衝突時に、インフレータからのガスによりエアバッグ全体を膨脹させ、該エアバッグの後端部はトリムの前端部を押し開いて下方へ展開させる車両用のエアバッグ装置であって、前記トリムの前端部をエアバッグの後端部の前側に回り込んだ形状にすると共に、該トリムの前端部から後方又は斜め後方へ向いた係合片を形成した。
【0008】
請求項1に記載の発明によれば、トリムの前端部から後方又は斜め後方へ向いた係合片を形成したため、エアバッグの膨脹により、トリムの前端部が開こうとすると、その力は係合片を係合孔から引き抜く方向に作用する。従って、係合片は破損せずに係合孔から強制的に引き抜かれ、トリムの前端部が開いてエアバッグを確実に展開させる。係合片を破壊しない分、エアバッグの膨脹力を必要以上に大きくする必要がなく、インフレータの小型化を図れる。
【0009】
請求項2に記載の発明は、係合片の先端に係合孔の一方の縁部に係合する爪を形成すると共に、該係合孔の他方の縁部を係合片の先端を一方の縁部側へ案内する傾斜状にした。
【0010】
請求項2に記載の発明によれば、トリムの取付時に係合片を係合孔に係合させ易い。
【0011】
請求項3に記載の発明は、係合孔の一部に切欠を形成した。
【0012】
請求項3に記載の発明によれば、エアバッグの膨脹時に係合片を係合孔から引き抜き易い。
【0013】
【発明の実施の形態】
以下、この発明の好適な実施形態を図面に基づいて説明する。
【0014】
図1〜図3は、この発明の第1実施形態を示す図である。ワゴン車の車体上部には図示せぬサイドルーフレールが形成され、そのサイドルーフレールに折り畳み状態のエアバッグ1が複数のブラケット2を介して設置されている。
【0015】
この折り畳み状態のエアバッグ1は前席位置から後席位置にかけて設置され、その後端部3は、リヤサイドウインドウ4の後方のラゲッジサイド5(図2参照)に沿って下方へ湾曲している。そして、エアバッグ1の最後端にはエアバッグ1内にガスを噴出するインフレータ6が接続されている。
【0016】
そして、車体の上部に位置する部分のエアバッグ1の大部分は、ヘッドライニング7にて車内側から覆われ、下方へ湾曲している後端部3は、ラゲッジサイド5に対応するトリム8にて車内側から覆われている。
【0017】
ヘッドライニング7の下端部7aと、トリム8の前端部8aとに対応する部分には、センタピラー9の上端部から後に延びたロックピラー10に対応している。ヘッドライニング7の下端部7aはロックピラー10に車内側から重なっているだけだが、トリム8の前端部8aはロックピラー10に対して係合している。
【0018】
すなわち、トリム8の前端部8aは、エアバッグ1の後端部3の前側に回り込んだ湾曲状態で、その前端部8aから斜め後方(真っ直ぐ後方でも可)に突出した係合片11が形成されている。この係合片11の先端には、車外側へ向いた爪12が形成されている。また、この係合片11の車内側には付け根から先端にかけて上下両端にリブ13が形成されている。リブ13の先端13aは傾斜しており、爪12と背中合わせになることで、係合片11の先端を先細り形状にしている。
【0019】
ロックピラー10の係合片11に対する対応部14は係合片11に向かい合う角度で形成され、そこには係合片11を係合させる係合孔15が形成されている。この係合孔15において爪12が係合する一方の縁部15aは平坦がだ、他方の縁部15bは前側に開いた傾斜状態になっている。従って、係合孔15内に係合片11を挿入することで、係合片11の先端が一方の縁部15a側に案内され、係合片11の爪12が確実に一方の縁部15aに係合した状態となる。従って、係合片11を係合孔15に係合させる作業が容易になる。
【0020】
このような構造において、車両が側面衝突を起こすと、インフレータ6からエアバッグ1内にガスが噴出されて、エアバッグ1全体が膨脹し、ヘッドライニング7の下端部7a及びトリム8の前端部8aが車内側に押し開かれる。そして、エアバッグ1が下方へ向けてカーテン状に展開し、乗員を保護する。
【0021】
ヘッドライニング7の下端部7aは、単にロックピラー10の車内側に重ねられているだけなので、容易に車内側へ開く。トリム8の前端部8aは、係合片11でロックピラー10の係合孔15と係合した状態になっているが、係合片11が斜め後方を向いているため、トリム8の前端部8aを押し開こうとするエアバッグ1の膨脹力は、係合片11を係合孔15から引き抜く方向に作用する。すなわち、図2に示すようにエアバッグ1の後端部3は、トリム8の前端部8aにおいて、前側への展開方向Sも示すため、係合片11の突出方向がこの展開方向Sに沿った方向へ傾斜した状態となる(従来のように直交しない)。
【0022】
従って、係合片11は破損せずに係合孔15から強制的に引き抜かれ、トリム8の前端部8aは確実に車内側へ開き、エアバッグ1のスムーズな展開を許容する。このように、係合片11を破壊しない分、エアバッグ1の膨脹力を必要以上に大きくする必要がないため、この実施形態では従来よりも小型のインフレータ6が採用されている。
【0023】
図4は、この発明の第2実施形態を示す。この第2実施形態では、係合孔15の中央に切欠16を形成した。従って、エアバッグの膨脹時に係合片を係合孔15から引き抜き易くなるため、トリムの前端部を更に確実に車外側へ開くことができる。
【0024】
以上の実施形態では、ワゴン車を例にしたため、エアバッグ1の後端部3はラゲッジサイド5に沿って下方へ湾曲した状態になっているが、乗用車の場合はリヤピラーに沿って下方へ湾曲し、車内側からはリヤピラートリムが取付けられることになる。
【0025】
【発明の効果】
この発明によれば、トリムの前端部から後方又は斜め後方へ向いた係合片を形成したため、エアバッグの膨脹により、トリムの前端部が開こうとすると、その力は係合片を係合孔から引き抜く方向に作用する。従って、係合片は破損せずに係合孔から強制的に引き抜かれ、トリムの前端部が開いてエアバッグを確実に展開させる。係合片を破壊しない分、エアバッグの膨脹力を必要以上に大きくする必要がなく、インフレータの小型化を図れる。
【図面の簡単な説明】
【図1】この発明の第1実施形態に係る車体上部を示す側面図。
【図2】図1中矢示SA−SA線に沿う断面図。
【図3】図2中矢示SB−SB線に沿う断面図。
【図4】この発明の第2実施形態を示す図3相当の断面図。
【符号の説明】
1 エアバッグ
3 後端部
5 ラゲッジサイド
6 インフレータ
8 トリム
8a 前端部
11 係合片
14 対応部
15 係合孔
16 切欠
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag device for a vehicle that is deployed in a curtain shape from the upper part of a vehicle body downward.
[0002]
[Prior art]
A side roof rail is formed on the upper part of a vehicle body, and a folded airbag is installed on the side roof rail (see Japanese Patent Application Laid-Open No. 2002-114124 as a similar technique). This folded airbag is installed from the front seat position to the rear seat position, and the rear end portion is curved downward along the rear pillar.
[0003]
And most of the airbag located in the upper part of the vehicle body is covered from the vehicle inner side by the head lining, and the rear end portion curved downward is covered from the vehicle inner side by the trim corresponding to the rear pillar. ing. In particular, an engagement piece projecting outward is formed at the front end portion of the trim, and the engagement piece engages with an engagement hole of a lock pillar fixed to the front end of the rear pillar.
[0004]
When the vehicle collides, the airbag inflates and pushes open the lower end of the head lining and the front end of the trim. At the front end of the trim, the engagement piece is broken by the inflating force of the airbag and opens to the inside of the vehicle. And from the lower end part of the head lining pushed open to the vehicle interior and the front end part of the trim, the airbag is deployed downward in a curtain shape to protect the occupant.
[0005]
[Problems to be solved by the invention]
However, in such a conventional technique, the engagement piece formed at the front end portion of the trim protrudes outward from the vehicle and is orthogonal to the airbag deployment direction. Unless it was destroyed by the inflating force of the airbag, the engagement state of the front end of the trim could not be released and opened to the vehicle interior side. For this reason, a large inflator is required to obtain a large expansion force sufficient to destroy the engagement piece, which increases the weight of the vehicle body.
[0006]
The present invention has been made paying attention to such a conventional technique, and provides an air bag apparatus for a vehicle that can open a front end portion of a trim without destroying an engagement piece.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, the airbag in a folded state is installed on the upper part of the vehicle body along the front-rear direction, and the rear end of the airbag is bent downward, and the rear end of the airbag Is covered with a trim attached from the inside of the vehicle, and an engagement piece formed at the front end portion of the trim is engaged with an engagement hole formed in a corresponding portion on the vehicle body side. An airbag device for a vehicle in which the entire bag is inflated, and the rear end portion of the airbag pushes the front end portion of the trim open and expands downward, and the front end portion of the trim is located on the front side of the rear end portion of the airbag. And an engagement piece that is directed rearward or obliquely rearward from the front end of the trim.
[0008]
According to the first aspect of the present invention, since the engagement piece that is directed rearward or obliquely rearward from the front end portion of the trim is formed, if the front end portion of the trim is opened due to inflation of the airbag, the force is applied. It acts in the direction of pulling out the combined piece from the engagement hole. Therefore, the engagement piece is forcibly pulled out from the engagement hole without being damaged, and the front end portion of the trim is opened, so that the airbag is reliably deployed. Since the inflating force of the airbag does not need to be increased more than necessary, the inflator can be miniaturized as long as the engagement piece is not broken.
[0009]
According to the second aspect of the present invention, a claw that engages with one edge of the engagement hole is formed at the tip of the engagement piece, and the other edge of the engagement hole is placed on the tip of the engagement piece. Inclined to guide to the edge side.
[0010]
According to the second aspect of the present invention, the engagement piece can be easily engaged with the engagement hole when the trim is attached.
[0011]
In the invention according to claim 3, a notch is formed in a part of the engagement hole.
[0012]
According to the third aspect of the present invention, it is easy to pull out the engagement piece from the engagement hole when the airbag is inflated.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0014]
1 to 3 are views showing a first embodiment of the present invention. A side roof rail (not shown) is formed at the upper part of the body of the wagon car, and a folded airbag 1 is installed on the side roof rail via a plurality of brackets 2.
[0015]
The airbag 1 in the folded state is installed from the front seat position to the rear seat position, and the rear end portion 3 is curved downward along the luggage side 5 (see FIG. 2) behind the rear side window 4. An inflator 6 that ejects gas into the airbag 1 is connected to the rear end of the airbag 1.
[0016]
And most of the airbag 1 at the upper part of the vehicle body is covered from the vehicle inner side by the head lining 7, and the rear end portion 3 curved downward is formed on the trim 8 corresponding to the luggage side 5. Covered from the inside.
[0017]
The portion corresponding to the lower end portion 7 a of the head lining 7 and the front end portion 8 a of the trim 8 corresponds to the lock pillar 10 extending rearward from the upper end portion of the center pillar 9. The lower end 7 a of the head lining 7 only overlaps the lock pillar 10 from the inside of the vehicle, but the front end 8 a of the trim 8 is engaged with the lock pillar 10.
[0018]
That is, the front end portion 8a of the trim 8 is in a curved state that wraps around the front side of the rear end portion 3 of the airbag 1, and an engagement piece 11 that protrudes obliquely rearward (or straight rearward is possible) from the front end portion 8a is formed. Has been. At the tip of the engagement piece 11, a claw 12 directed to the outside of the vehicle is formed. Further, ribs 13 are formed on both the upper and lower ends of the engagement piece 11 from the base to the tip. The tip 13a of the rib 13 is inclined, and the tip of the engagement piece 11 is tapered by being back-to-back with the claw 12.
[0019]
A corresponding portion 14 of the lock pillar 10 with respect to the engagement piece 11 is formed at an angle facing the engagement piece 11, and an engagement hole 15 for engaging the engagement piece 11 is formed therein. In this engagement hole 15, one edge 15a with which the claw 12 engages is flat, and the other edge 15b is inclined to the front side. Therefore, by inserting the engagement piece 11 into the engagement hole 15, the tip of the engagement piece 11 is guided to the one edge 15a side, and the claw 12 of the engagement piece 11 is surely connected to the one edge 15a. Is engaged. Therefore, the operation of engaging the engagement piece 11 with the engagement hole 15 is facilitated.
[0020]
In such a structure, when the vehicle undergoes a side collision, gas is ejected from the inflator 6 into the airbag 1 to inflate the entire airbag 1, and the lower end 7a of the headlining 7 and the front end 8a of the trim 8 are inflated. Is pushed to the inside of the car. And the airbag 1 expand | deploys in a curtain shape toward the downward direction, and a passenger | crew is protected.
[0021]
The lower end portion 7a of the head lining 7 is simply stacked on the inner side of the lock pillar 10 and therefore easily opens to the inner side of the vehicle. The front end 8a of the trim 8 is in a state of being engaged with the engagement hole 15 of the lock pillar 10 by the engagement piece 11, but since the engagement piece 11 faces diagonally rearward, the front end of the trim 8 The inflation force of the airbag 1 that tries to push open the 8a acts in the direction of pulling the engagement piece 11 out of the engagement hole 15. That is, as shown in FIG. 2, the rear end portion 3 of the airbag 1 also indicates a frontward deployment direction S at the front end portion 8 a of the trim 8, so that the protruding direction of the engagement piece 11 is along the deployment direction S. It is in a state of being inclined in the direction (not orthogonal as in the prior art).
[0022]
Therefore, the engagement piece 11 is forcibly pulled out from the engagement hole 15 without being damaged, and the front end portion 8a of the trim 8 is surely opened to the inside of the vehicle, thereby allowing the airbag 1 to be smoothly deployed. Thus, since the inflating force of the airbag 1 does not need to be increased more than necessary because the engagement piece 11 is not broken, the inflator 6 that is smaller than the conventional one is employed in this embodiment.
[0023]
FIG. 4 shows a second embodiment of the present invention. In the second embodiment, the notch 16 is formed in the center of the engagement hole 15. Therefore, the engagement piece can be easily pulled out from the engagement hole 15 when the airbag is inflated, so that the front end portion of the trim can be more reliably opened to the outside of the vehicle.
[0024]
In the above embodiment, since the wagon car is taken as an example, the rear end portion 3 of the airbag 1 is curved downward along the luggage side 5, but in the case of a passenger car, curved downward along the rear pillar. The rear pillar trim is attached from the inside of the vehicle.
[0025]
【The invention's effect】
According to the present invention, since the engagement piece directed rearward or obliquely rearward from the front end portion of the trim is formed, when the front end portion of the trim is opened due to the inflation of the airbag, the force engages the engagement piece. It acts in the direction of pulling out from the hole. Therefore, the engagement piece is forcibly pulled out from the engagement hole without being damaged, and the front end portion of the trim is opened, so that the airbag is reliably deployed. Since the inflating force of the airbag does not need to be increased more than necessary, the inflator can be miniaturized as long as the engagement piece is not broken.
[Brief description of the drawings]
FIG. 1 is a side view showing an upper part of a vehicle body according to a first embodiment of the invention.
FIG. 2 is a cross-sectional view taken along the line SA-SA shown in FIG.
3 is a sectional view taken along the line SB-SB in FIG.
4 is a cross-sectional view corresponding to FIG. 3, showing a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Airbag 3 Rear end part 5 Luggage side 6 Inflator 8 Trim 8a Front end part 11 Engagement piece 14 Corresponding part 15 Engagement hole 16 Notch

Claims (3)

折り畳み状態のエアバッグを車体上部に前後方向に沿って設置すると共に、該エアバッグの後端部を下方へ湾曲させた状態とし、
該エアバッグの後端部を車内側から取付けたトリムで覆うと共に、該トリムの前端部に形成した係合片を、車体側の対応部に形成された係合孔に係合させ、
衝突時に、インフレータからのガスによりエアバッグ全体を膨脹させ、該エアバッグの後端部はトリムの前端部を押し開いて下方へ展開させる車両用のエアバッグ装置であって、
前記トリムの前端部をエアバッグの後端部の前側に回り込んだ形状にすると共に、該トリムの前端部から後方又は斜め後方へ向いた係合片を形成したことを特徴とする車両用のエアバッグ装置。
A folded airbag is installed on the upper part of the vehicle body along the front-rear direction, and the rear end of the airbag is bent downward,
The rear end of the airbag is covered with a trim attached from the inside of the vehicle, and an engagement piece formed at the front end of the trim is engaged with an engagement hole formed in a corresponding portion on the vehicle body side,
At the time of a collision, the airbag is inflated with the gas from the inflator, and the rear end of the airbag pushes the front end of the trim open and deploys downward.
The vehicle has a shape in which the front end portion of the trim wraps around to the front side of the rear end portion of the airbag, and an engagement piece that is directed rearward or obliquely rearward from the front end portion of the trim. Airbag device.
請求項1に記載の車両用のエアバッグ装置であって、
係合片の先端に係合孔の一方の縁部に係合する爪を形成すると共に、該係合孔の他方の縁部を係合片の先端を一方の縁部側へ案内する傾斜状にしたことを特徴とする車両用のエアバッグ装置。
The vehicle airbag device according to claim 1,
A claw that engages with one edge of the engagement hole is formed at the tip of the engagement piece, and the other edge of the engagement hole is inclined to guide the tip of the engagement piece toward the one edge. An air bag apparatus for a vehicle characterized by the above.
請求項1又は請求項2に記載の車両用のエアバッグ装置であって、
係合孔の一部に切欠を形成したことを特徴とする車両用のエアバッグ装置。
The vehicle airbag device according to claim 1 or 2,
A vehicle airbag apparatus, wherein a notch is formed in a part of the engagement hole.
JP2002174920A 2002-06-14 2002-06-14 Airbag device for vehicle Expired - Fee Related JP4056801B2 (en)

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JP4056801B2 true JP4056801B2 (en) 2008-03-05

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006298334A (en) * 2005-04-25 2006-11-02 Nippon Plast Co Ltd Airbag device
JP5166948B2 (en) * 2008-04-09 2013-03-21 本田技研工業株式会社 Airbag device
DE102008047693A1 (en) * 2008-09-18 2010-03-25 GM Global Technology Operations, Inc., Detroit Cladding element for area by area covering of chassis pillar in its installation position in motor vehicle, comprises cavity, which is formed between chassis pillar and inner side, where cavity is provided for holding airbag

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