JP2007131172A - Curtain air bag device - Google Patents

Curtain air bag device Download PDF

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JP2007131172A
JP2007131172A JP2005326494A JP2005326494A JP2007131172A JP 2007131172 A JP2007131172 A JP 2007131172A JP 2005326494 A JP2005326494 A JP 2005326494A JP 2005326494 A JP2005326494 A JP 2005326494A JP 2007131172 A JP2007131172 A JP 2007131172A
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airbag device
curtain airbag
air bag
inflator
pressure gas
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JP4796819B2 (en
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Yuichiro Yoshida
雄一朗 吉田
Yoshihiro Oba
祥寛 大場
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Autoliv Development AB
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Autoliv Development AB
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a curtain air bag device not for making an air bag ride up or breaking it at a hanging part at the time of actuating an inflator even if the air bag is installed in a state of being projected in a compartment. <P>SOLUTION: This curtain air bag device 11 is provided with an inflator 12, and an air bag 13 comprising a plurality of chambers 13 mounted along a roof side rail 4, supplying high-pressure gas emitted from the inflator 12 via a duct 13d, and expanded and deployed between the head of an occupant and the inner side of the compartment. The downstream side of the high pressure gas flow of the projection existing on the roof side rail 4 of the air bag 13 is covered with a stationary cover 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、たとえば横転時のように、特に車体の側部方向に高荷重が作用したときに、複数のチャンバーがカーテン状に展開して乗員の頭部を保護するカーテンエアバッグ装置に関するものである。   The present invention relates to a curtain airbag device in which a plurality of chambers are deployed in a curtain shape to protect an occupant's head, for example, when a heavy load is applied in the direction of the side of a vehicle body, for example, when the vehicle rolls over. is there.

車体の側部方向に高荷重が作用したとき、サイドドアガラスに沿って複数のチャンバーをカーテン状に膨張させるカーテンエアバッグ装置が、自動車に設置されるようになってきている。このカーテンエアバッグ装置を設置すれば、車体の側部方向に高荷重が作用した場合にも、シートに着座した乗員の頭部を効果的に保護することができる。   2. Description of the Related Art A curtain airbag device that inflates a plurality of chambers in a curtain shape along a side door glass when a high load is applied in a side direction of a vehicle body has been installed in an automobile. If this curtain airbag device is installed, the head of the occupant seated on the seat can be effectively protected even when a high load acts in the direction of the side of the vehicle body.

ところで、カーテンエアバッグ装置は、フロントピラー（Ａピラー）からセンターピラー（Ｂピラー）を通ってリアピラー（Ｃピラー）に至るルーフサイドレールに沿って、複数のタブで取り付けられている。
特表２００２−５０３５８１号公報 By the way, the curtain airbag device is attached with a plurality of tabs along a roof side rail extending from the front pillar (A pillar) to the rear pillar (C pillar) through the center pillar (B pillar).
Japanese translation of PCT publication No. 2002-503581

一方、側面衝突に対する車内強度を向上する観点から、Ｂピラーが大きくなって、図５のように、車室内にＢピラー１が突出する場合がある。このような場合、ルーフサイドレール４に沿ってタブ５を介して設置されるカーテンエアバッグ装置１１は、図５（ｂ）のように、Ｂピラー１部で車室内側に張り出した状態で設置される。なお、図５中の２はＡピラー、３はＣピラーを示す。   On the other hand, from the viewpoint of improving the in-vehicle strength against a side collision, the B pillar may become large and the B pillar 1 may protrude into the vehicle interior as shown in FIG. In such a case, the curtain airbag device 11 installed along the roof side rail 4 via the tab 5 is installed in a state of protruding toward the vehicle interior side at the B pillar 1 portion as shown in FIG. Is done. In FIG. 5, 2 indicates an A pillar and 3 indicates a C pillar.

このように、エアバッグが車室内側に張り出した状態で設置されると、作動時、インフレータから噴出される高圧ガス流の、張り出し部の下流側では、展開したエアバッグに車室内方向の力が働き、エアバッグが上方にまくれ上がるという現象が起こることが新たに判明した。なお、図５（ｂ）には、インフレータから噴出される高圧ガス流を白抜き矢印で、展開したエアバッグに働く車室内方向の力を矢印で示している。   As described above, when the airbag is installed in a state of projecting to the vehicle interior side, when it is in operation, a force in the vehicle interior direction is applied to the deployed airbag on the downstream side of the projecting portion of the high-pressure gas flow ejected from the inflator. It has been newly found that the phenomenon occurs that the airbag rises upward. In FIG. 5B, the high-pressure gas flow ejected from the inflator is indicated by a white arrow, and the force in the vehicle interior direction acting on the deployed airbag is indicated by an arrow.

さらに、エアバッグが上方にまくれ上がると、当該部分がガスの吹き溜まりとなって内圧が異常に上がることが観測され、最も厳しい条件下では、その部分が破裂する恐れがあることも分かった。仮にエアバッグが破裂すると、乗員の頭部を効果的に保護することができなくなる。   Furthermore, it was observed that when the airbag is turned up, the portion becomes a gas trap and the internal pressure rises abnormally. Under the most severe conditions, the portion may burst. If the airbag bursts, the passenger's head cannot be effectively protected.

本発明が解決しようとする問題点は、従来のカーテンエアバッグ装置は、車室内側に張り出した部分があると、当該張り出し部の高圧ガス流の下流側に位置するエアバッグが上方にまくれ上がって破裂するという点である。   The problem to be solved by the present invention is that when the conventional curtain airbag device has a portion that protrudes toward the vehicle interior side, the airbag located on the downstream side of the high-pressure gas flow of the extension portion rises upward. The point is that it bursts.

本発明のカーテンエアバッグ装置は、
インフレータと、
ルーフサイドレールに沿って取り付けられ、前記インフレータから噴出する高圧ガスを、ダクト部を介して供給され、乗員の頭部と車室の内側面間で膨張展開する複数のチャンバーからなるエアバッグを備えたカーテンエアバッグ装置であって、
前記エアバッグにおける、ルーフサイドレール上に存在する張り出し部の、前記高圧ガス流の下流側を、固定カバーで覆ったことを最も主要な特徴としている。 The curtain airbag device of the present invention is
An inflator,
A high-pressure gas attached along the roof side rail and supplied from the inflator via a duct portion is provided with an air bag comprising a plurality of chambers that are inflated and deployed between the occupant's head and the inner side surface of the passenger compartment. Curtain airbag device,
The most important feature is that a fixed cover covers the downstream side of the high-pressure gas flow of the overhanging portion existing on the roof side rail in the airbag.

このような構成の本発明のカーテンエアバッグ装置では、エアバッグが車室内側に張り出した状態で設置されても、インフレータの作動時、エアバッグは必ず固定カバー内に存在する。したがって、ダクト内の内圧をうまく制御でき、ダクト内下流側やチャンバー内に高圧ガスが速く流れるようになって、当該張り出し部のエアバッグが上方にまくれ上がることがなくなり、当該張り出し部にガスの吹き溜まりが発生せず、破裂することがない。   In the curtain airbag device of the present invention having such a configuration, even when the airbag is installed in a state of projecting to the vehicle interior side, the airbag is always present in the fixed cover when the inflator is activated. Therefore, the internal pressure in the duct can be controlled well, the high-pressure gas flows quickly in the downstream side of the duct and in the chamber, and the airbag of the overhanging portion does not rise upward. No puddles are generated and no rupture occurs.

本発明のカーテンエアバッグ装置における前記固定カバーを、車外側が平坦な平面で、車室内側が凸状に湾曲した曲面を備えた横断面形状を有するようにした場合は、ダクト内の内圧制御や、ダクト内下流側やチャンバー内への高圧ガス流れが、より良好になる。   When the fixed cover in the curtain airbag device of the present invention has a cross-sectional shape with a flat surface on the outside of the vehicle and a curved surface curved convexly on the vehicle interior side, the internal pressure control in the duct or The high-pressure gas flow to the downstream side in the duct and the chamber becomes better.

また、本発明のカーテンエアバッグ装置における前記固定カバーの下部に、切り込み又は切り欠き部を設けた場合には、エアバッグの所定方向への膨張展開がより迅速に行えるようになる。   In addition, when a cut or notch is provided in the lower part of the fixed cover in the curtain airbag device of the present invention, the airbag can be inflated and deployed in a predetermined direction more quickly.

また、その際、本発明のカーテンエアバッグ装置における前記固定カバーの、前記の平面と曲面との接続部分の厚さを、他の部分の厚さよりも薄くした場合には、切り込み又は切り欠き部を設けた効果がより発揮できるようになる。   Further, at that time, when the thickness of the connecting portion between the flat surface and the curved surface of the fixed cover in the curtain airbag device of the present invention is made thinner than the thickness of the other portion, a cut or notched portion is formed. The effect of providing can be demonstrated more.

本発明は、Ｂピラーなどによってエアバッグが車室内側に張り出した状態で設置されても、インフレータの作動時、ダクト内の当該張り出し部の下流側には、必ず固定カバー内にエアバッグが存在して、その部分のダクト内の内圧をうまく制御できるようになる。したがって、ダクト内下流側やチャンバー内に高圧ガスが適切に速く流れるようになって、当該張り出し部のエアバッグが上方にまくれ上がることがなくなり、ガスの吹き溜まりが発生せず、破裂することがない。   In the present invention, even if the airbag is installed in a state where the airbag is extended to the vehicle interior side by the B pillar or the like, the airbag is always present in the fixed cover at the downstream side of the protruding portion in the duct when the inflator is activated. As a result, the internal pressure in the duct of that portion can be controlled well. Accordingly, the high-pressure gas can flow appropriately and quickly in the duct downstream and in the chamber, and the airbag of the overhanging portion will not rise upward, so that gas will not accumulate and will not burst. .

以下、本発明を実施するための最良の形態について、図１及び図２を用いて説明する。
本発明のカーテンエアバッグ装置１１は、図１に示すように、インフレータ１２と、インフレータ１２から噴出する高圧ガスによって膨張展開するエアバッグ１３を備えた構成である。そして、このエアバッグ１３は、複数のチャンバーと、前記高圧ガスを複数のチャンバーに導くダクトを備えている。 Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
As shown in FIG. 1, the curtain airbag device 11 of the present invention includes an inflator 12 and an airbag 13 that is inflated and deployed by a high-pressure gas ejected from the inflator 12. The airbag 13 includes a plurality of chambers and ducts that guide the high-pressure gas to the plurality of chambers.

前記インフレータ１２は、たとえば車室のルーフサイドレール４部に設置されている。そして、側突などの車体側部に作用する所定値以上の高荷重を、たとえばＢピラー１の下端部近傍に設置したセンサ（図示せず）が検出した時に、センサからの信号を受けて高圧ガスを噴出する。   The inflator 12 is installed, for example, on the roof side rail 4 part of the passenger compartment. When a sensor (not shown) installed near the lower end of the B pillar 1 detects a high load that acts on the side of the vehicle body, such as a side collision, for example, a high pressure is received in response to a signal from the sensor. Spout gas.

また、前記エアバッグ１３は、複数のチャンバーを、例えば図２のように、一方端１３ａ側から巻き取り、他方端１３ｂ部を上方に折り返して長尺状にした状態で、図１に示すように、車室のルーフサイドレール４部に沿って格納される。そして、インフレータ１２から噴出する高圧ガスを、ダクトを介して供給される。ダクトは、ほぼエアバッグ１３の他方端１３ｂの側に配置される。   As shown in FIG. 1, the airbag 13 has a plurality of chambers wound up from one end 13 a side, for example, as shown in FIG. 2, and the other end 13 b is folded back to be elongated. And stored along the roof side rail 4 part of the passenger compartment. And the high pressure gas ejected from the inflator 12 is supplied through a duct. The duct is disposed substantially on the other end 13b side of the airbag 13.

ところで、本発明のカーテンエアバッグ装置１１では、前記エアバッグ１３における、ルーフサイドレール４上に存在する張り出し部、例えばＢピラー１の、前記高圧ガス流の下流側を、例えば合成樹脂製の固定カバー１４で覆っている。   By the way, in the curtain airbag device 11 of the present invention, the overhanging portion existing on the roof side rail 4 in the airbag 13, for example, the downstream side of the high-pressure gas flow of the B pillar 1 is fixed, for example, made of synthetic resin. Covered with a cover 14.

この固定カバー１４の車室への固定手段は限定されないが、図１（ｂ）の例では、タブ５ａに引っ掛けると共に、ジャンプ屋根６とアシストグリップ台座７に当接させることで、移動しないように固定したものを示している。   The fixing means for fixing the fixing cover 14 to the passenger compartment is not limited. In the example of FIG. 1B, the fixing cover 14 is hooked on the tab 5a and brought into contact with the jump roof 6 and the assist grip base 7 so as not to move. It shows a fixed one.

この固定カバー１４は、例えば図２に示すように、車外側が平坦な平面で、車室内側が凸状に湾曲した曲面を備えた横断面形状を有するように形成されている。そして、その下部には切り欠き部１４ａを有すると共に、前記の平面と曲面との接続部分１４ｂの厚さが、他の部分の厚さよりも薄くしている。なお、図２中の１４ｃは平面部、１４ｄは曲面部を示す。   For example, as shown in FIG. 2, the fixed cover 14 is formed to have a cross-sectional shape with a flat surface on the vehicle outer side and a curved surface curved convexly on the vehicle interior side. And it has the notch part 14a in the lower part, and the thickness of the connection part 14b of the said plane and curved surface is made thinner than the thickness of another part. In FIG. 2, 14c indicates a flat surface portion, and 14d indicates a curved surface portion.

本発明のカーテンエアバッグ装置は、このような固定カバー１４で、ルーフサイドレール４上に存在する張り出し部の、高圧ガス流の下流側斜面４ａを覆うことで、以下のような作用効果を得ることができる。   The curtain airbag device of the present invention covers the downstream side inclined surface 4a of the high-pressure gas flow of the overhanging portion existing on the roof side rail 4 with such a fixed cover 14, thereby obtaining the following effects. be able to.

(1) インフレータ１２から噴射された高圧ガス流による力が、図１（ｂ）に矢印で示す車室内方向に働いても、固定カバー１４は取り付けられた位置を動かないので、展開したエアバッグ１３には、前記矢印方向の力が働かない。 (1) Even if the force caused by the high-pressure gas flow injected from the inflator 12 works in the vehicle interior direction indicated by the arrow in FIG. 1 (b), the fixed cover 14 does not move the attached position. 13, the force in the direction of the arrow does not work.

したがって、ダクト内の内圧制御や、ダクト内下流側やチャンバー内への高圧ガス流れが良好に行えて、ガスの吹き溜まりが発生せず、破裂することがない。   Therefore, the internal pressure control in the duct, the high-pressure gas flow into the downstream side of the duct and into the chamber can be satisfactorily performed, and no gas is trapped and does not rupture.

(2) 固定カバー１４に覆われたダクト内を高圧ガスが流れると、厚みを薄くした接続部分１４ｂがヒンジの役割をして切り欠き部１４ａが開き、切り欠き部１４ａからエアバッグ１３が所定方向に迅速に膨張展開する。 (2) When high-pressure gas flows through the duct covered by the fixed cover 14, the connection portion 14b having a reduced thickness acts as a hinge to open the cutout portion 14a, and the airbag 13 is opened from the cutout portion 14a. Inflate and deploy quickly in the direction.

すなわち、本発明のカーテンエアバッグ装置１１では、エアバッグ１３を取り付けるルーフサイドレール４上に張り出し部があっても、当該部分でエアバッグ１３が破裂することがないので、乗員の頭部を確実に保護することができる。   That is, in the curtain airbag device 11 of the present invention, even if there is an overhanging portion on the roof side rail 4 to which the airbag 13 is attached, the airbag 13 will not rupture at that portion, so that the occupant's head can be secured. Can be protected.

ここで、固定カバー１４は、特に前記張り出し部下流側の少なくとも引き下がり開始部分４ｂを覆い、かつ、高圧ガスの流れの向きがルーフサイドレール４の斜面４ａの傾斜方向に沿って流れるように、当該斜面４ａに沿って配置されることが好ましい。   Here, the fixed cover 14 particularly covers at least the pulling start portion 4b on the downstream side of the overhanging portion, and the direction of the flow of the high pressure gas flows along the inclination direction of the inclined surface 4a of the roof side rail 4 It is preferable to arrange | position along the slope 4a.

ちなみに、Ｂピラーが車室内側に８０mm張り出した自動車に、図１に示した本発明のカーテンエアバッグ装置と、図５に示した従来のカーテンエアバッグ装置を用いて、インフレータ１２を作動させた場合のエアバッグ１３の内圧を、図３に示す位置で測定した。その結果を図４に示す。なお、図３中の１３ｃはエアバッグ１３を構成するチャンバー、１３ｄは同じくダクトを示す。   Incidentally, the inflator 12 was operated on the automobile in which the B-pillar protruded 80 mm toward the vehicle interior side using the curtain airbag device of the present invention shown in FIG. 1 and the conventional curtain airbag device shown in FIG. The internal pressure of the airbag 13 was measured at the position shown in FIG. The result is shown in FIG. In FIG. 3, 13c denotes a chamber constituting the airbag 13, and 13d denotes a duct.

ルーフサイドレール上に存在する張り出し部の、高圧ガス流の下流側を、固定カバーで覆わない従来のカーテンエアバッグ装置の場合、エアバッグは前記下流側部分で上方にまくれ上がってガスの吹き溜まりとなった。そして、インフレータの作動から４．６msec経過した時に、当該部分の内圧が約３５０mPaとなって車外側が破裂した。   In the case of a conventional curtain airbag device in which the downstream side of the high-pressure gas flow of the overhanging portion existing on the roof side rail is not covered with a fixed cover, the airbag rises upward at the downstream side portion and the gas puddle accumulates. became. Then, when 4.6 msec passed from the operation of the inflator, the internal pressure of the portion became about 350 mPa and the outside of the vehicle burst.

これに対して、固定カバーで覆った本発明のカーテンエアバッグ装置の場合、固定カバーの作用により、エアバッグは前記下流側部分で上方にまくれ上がることはなかった。しかも、エアバッグの内圧は最高でも２６５mPaで、破裂することはなかった。   On the other hand, in the case of the curtain airbag device of the present invention covered with the fixed cover, the airbag did not turn up at the downstream portion due to the action of the fixed cover. Moreover, the internal pressure of the airbag was 265 mPa at the maximum, and it did not rupture.

本発明は上記の例に限らず、各請求項に記載された技術的思想の範囲内で、適宜実施の形態を変更しても良いことは言うまでもない。   The present invention is not limited to the above example, and it goes without saying that the embodiment may be appropriately changed within the scope of the technical idea described in each claim.

本発明のカーテンエアバッグ装置は、自動車に設置して用いるが、車両以外に航空機や船舶等の乗物に設けることも可能であり、同様な効果が発揮される。   Although the curtain airbag device of the present invention is used by being installed in an automobile, it can also be installed on a vehicle such as an aircraft or a ship other than a vehicle, and the same effect is exhibited.

（ａ）は本発明のカーテンエアバッグ装置を自動車の側面方向から見た図、（ｂ）はカバーの取り付け部近傍を自動車の上方から見た拡大図である。(A) is the figure which looked at the curtain airbag apparatus of this invention from the side surface direction of the motor vehicle, (b) is the enlarged view which looked at the attachment part vicinity of the cover from the upper direction of the motor vehicle. 図１（ｂ）のＡ−Ａ断面図である。It is AA sectional drawing of FIG.1 (b). インフレータから高圧ガスを噴出した場合のエアバッグに作用する内圧の測定位置を示した図である。It is the figure which showed the measurement position of the internal pressure which acts on an airbag at the time of injecting high pressure gas from an inflator. 図３に示した測定位置におけるエアバッグに発生した内圧と時間の関係を示した図である。It is the figure which showed the relationship between the internal pressure which generate | occur | produced in the airbag in the measurement position shown in FIG. 3, and time. （ａ）はカーテンエアバッグ装置の設置状態を説明する図、（ｂ）はＢピラー近傍を自動車の上方から拡大して示した図である。(A) is a figure explaining the installation state of a curtain airbag apparatus, (b) is the figure which expanded and showed the B pillar vicinity from the upper direction of a motor vehicle.

符号の説明Explanation of symbols

１ Ｂピラー
４ ルーフサイドレール
１１ カーテンエアバッグ装置
１２ インフレータ
１３ エアバッグ
１４ 固定カバー
１４ａ 切り欠き部
１４ｂ 接続部分
１４ｃ 平面部
１４ｄ 曲面部
DESCRIPTION OF SYMBOLS 1 B pillar 4 Roof side rail 11 Curtain airbag apparatus 12 Inflator 13 Airbag 14 Fixed cover 14a Notch part 14b Connection part 14c Plane part 14d Curved part

Claims (5)

インフレータと、
ルーフサイドレールに沿って取り付けられ、前記インフレータから噴出する高圧ガスを、ダクトを介して供給され、乗員の頭部と車室の内側面間で膨張展開する複数のチャンバーからなるエアバッグを備えたカーテンエアバッグ装置であって、
前記エアバッグにおける、ルーフサイドレール上に存在する張り出し部の、前記高圧ガス流の下流側を、固定カバーで覆ったことを特徴とするカーテンエアバッグ装置。 An inflator,
A high-pressure gas attached along the roof side rail and supplied from the inflator via a duct is provided with an air bag comprising a plurality of chambers that are inflated and deployed between the head of the occupant and the inner surface of the passenger compartment. A curtain airbag device,
A curtain airbag device, wherein a fixed cover covers the downstream side of the high-pressure gas flow of the overhanging portion existing on the roof side rail in the airbag. 前記固定カバーは、車外側が平坦な平面で、車室内側が凸状に湾曲した曲面を備えた横断面形状を有するものであることを特徴とする請求項１に記載のカーテンエアバッグ装置。   2. The curtain airbag device according to claim 1, wherein the fixed cover has a cross-sectional shape with a flat surface on the vehicle outer side and a curved surface curved in a convex shape on the vehicle interior side. 前記固定カバーは、下部に切り込み又は切り欠き部を有するものであることを特徴とする請求項１又は２に記載のカーテンエアバッグ装置。   The curtain airbag device according to claim 1, wherein the fixed cover has a notch or a notch at a lower portion. 前記固定カバーは、前記の平面と曲面との接続部分の厚さが、他の部分の厚さよりも薄くなされていることを特徴とする請求項３に記載のカーテンエアバッグ装置。   4. The curtain airbag device according to claim 3, wherein a thickness of a connection portion between the flat surface and the curved surface of the fixed cover is smaller than a thickness of other portions. 前記ルーフサイドレール上に存在する張り出し部は、Ｂピラー部であることを特徴とする請求項１〜４の何れかに記載のカーテンエアバッグ装置。
The curtain airbag device according to any one of claims 1 to 4, wherein the overhanging portion existing on the roof side rail is a B pillar portion.
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JP2009090709A (en) * 2007-10-04 2009-04-30 Honda Motor Co Ltd Vehicle airbag device
CN101758810A (en) * 2010-02-26 2010-06-30 浙江吉利汽车研究院有限公司 Automotive compartment air curtain
US8096574B2 (en) * 2007-10-04 2012-01-17 Honda Motor Co., Ltd. Air bag system for vehicle

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JP2005519797A (en) * 2001-06-26 2005-07-07 オートリブ エーエスピー インコーポレイテッド Apparatus and method for enveloping inflatable curtains
JP2005219524A (en) * 2004-02-03 2005-08-18 Nippon Plast Co Ltd Air bag device for side collision of automobile

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JP2000296753A (en) * 1999-04-15 2000-10-24 Honda Motor Co Ltd Occupant restraint device
JP2005519797A (en) * 2001-06-26 2005-07-07 オートリブ エーエスピー インコーポレイテッド Apparatus and method for enveloping inflatable curtains
JP2003011766A (en) * 2001-06-27 2003-01-15 Toyota Motor Corp Head part protection air bag device
JP2005219524A (en) * 2004-02-03 2005-08-18 Nippon Plast Co Ltd Air bag device for side collision of automobile

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Publication number Priority date Publication date Assignee Title
JP2009090709A (en) * 2007-10-04 2009-04-30 Honda Motor Co Ltd Vehicle airbag device
US8096574B2 (en) * 2007-10-04 2012-01-17 Honda Motor Co., Ltd. Air bag system for vehicle
CN101758810A (en) * 2010-02-26 2010-06-30 浙江吉利汽车研究院有限公司 Automotive compartment air curtain

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