JP4134444B2 - Head protection airbag device airbag - Google Patents

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JP4134444B2
JP4134444B2 JP16567899A JP16567899A JP4134444B2 JP 4134444 B2 JP4134444 B2 JP 4134444B2 JP 16567899 A JP16567899 A JP 16567899A JP 16567899 A JP16567899 A JP 16567899A JP 4134444 B2 JP4134444 B2 JP 4134444B2
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airbag
inflated
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JP2000355261A (en
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利則 棚瀬
光由 大野
規夫 漆
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、自動車に装着される頭部保護エアバッグ装置のエアバッグに関し、詳しくは、車内側の開口周縁の上縁側に折り畳まれて収納され、膨張用ガスの流入時、開口を覆うように膨張する頭部保護エアバッグ装置のエアバッグに関する。
【０００２】
【従来の技術とその課題】
従来、この種の頭部保護エアバッグ装置のエアバッグでは、国際公開特許Ｗ０９６／２６０８７や英国特許出願公開第２３１４３００号等に記載されているように、車内側の開口を覆うように膨張する袋状の膨張部を備えて構成されていた。この膨張部は、膨張時、前後方向の張力を発揮するように、上下方向の非膨張部を水平方向に複数個並設し、上下方向に延びる膨張室を水平方向に並設する構成としていた。
【０００３】
このような構成では、膨張時、各膨張室が膨張すれば、非膨張部間の距離が狭まって、膨張部に前後方向の張力が作用され、乗員拘束時、膨張部の車外側への移動を抑えることができた。
【０００４】
しかし、従来のエアバッグでは、下縁側に生ずる張力を強くする点に、改善の余地があった。
【０００５】
本発明は、エアバッグの膨張時、エアバッグの下縁側に特に張力を発揮させることができる頭部保護エアバッグ装置のエアバッグを提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明に係る第１番目のエアバッグは、車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有するエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前後方向の端部側に、膨張用ガスを流入させる張力発揮用膨張部と、該張力発揮用膨張部の周囲に配置される非膨張部と、を備えて構成され、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、元部側を、前記張力発揮用膨張部の上縁側の前記非膨張部に固着させ、先端部側を、前記張力発揮用膨張部の外周面に沿って下方へ延ばして、前記張力発揮用膨張部の下縁側の前記非膨張部を挿通させ、さらに、前記エアバッグ本体から前後方向に離れた前記開口周縁に固着させていることを特徴とする。
【０００８】
本発明に係る第２番目のエアバッグは、車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有したエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前記エアバッグ本体の前後方向の端部における上部側に、展開膨張時に前記エアバッグ本体から遠ざかる前後方向に突出するように膨張可能として、折り畳まれた突出膨張部を備え、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、前記突出膨張部の突出端側と前記突出膨張部の元部側における前記エアバッグ本体の下縁側とに固着されていることを特徴とする。
【０００９】
本発明に係る第３番目のエアバッグは、車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有したエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前記エアバッグ本体の前後方向の端部における上部側に前後方向に配置されて、展開膨張時に先細り状に膨張するテーパ膨張部を備え、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、前記テーパ膨張部における先端側の外径に対応した内径を有したリング部を先端側に備え、該リング部を前記テーパ膨張部に外装させて、元部側を、前記テーパ膨張部の元部側における前記エアバッグ本体の下縁側に、固着させていることを特徴とする。
【００１０】
本発明に係る第４番目のエアバッグは、車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有したエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前記エアバッグ本体の前後方向の端部における上部側に前後方向に配置されて、展開膨張時に折りを解消して下方へ膨らむように膨張する棒状膨張部を備え、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、元部側を前記棒状膨張部の元部側における前記エアバッグ本体の下縁側に固着させるとともに、先端部に設けたスリットに前記ベルト部の中間部位を挿通させてなるループ部に、折り畳んだ前記棒状膨張部をくるませていることを特徴とする。
【００１１】
【発明の効果】
本発明に係る第１番目の頭部保護エアバッグ装置のエアバッグでは、展開膨張時、エアバッグ本体の張力発揮用膨張部が膨張すれば、張力発揮用膨張部の外周面に沿って配置されたベルト部の元部側が、張力発揮用膨張部の膨張にともなって、張力発揮用膨張部の下縁側を挿通しているベルト部の先端部側を引き込む。そのため、ベルト部に張力が発揮され、ベルト部が、挿通している張力発揮用膨張部の下縁側を、開口周縁に固着させた先端部側に、引っ張ることとなって、エアバッグ本体の下縁側に張力が発揮される。
【００１２】
したがって、本発明に係る第１番目の頭部保護エアバッグ装置のエアバッグでは、エアバッグ本体の下縁側に特に張力を発揮させることができて、乗員拘束時、エアバッグの車外側への移動を抑えることができる。
【００１５】
本発明に係る第２番目の頭部保護エアバッグ装置のエアバッグでは、展開膨張時、エアバッグ本体の突出膨張部が、折り畳まれた状態から、エアバッグ本体から遠ざかる前後方向に突出するように、膨張する。そのため、突出膨張部の突出端側に固着されたベルト部が、その元部側を固着させている突出膨張部の元部側におけるエアバッグ本体の下縁を引っ張ることとなり、その結果、エアバッグ本体の下縁側に張力が発揮される。
【００１６】
したがって、本発明に係る第２番目の頭部保護エアバッグ装置のエアバッグでも、エアバッグ本体の下縁側に特に張力を発揮させることができて、乗員拘束時、エアバッグの車外側への移動を抑えることができる。
【００１７】
本発明に係る第３番目の頭部保護エアバッグ装置のエアバッグでは、展開膨張時、テーパ膨張部が膨張すれば、そのテーパ膨張部に外装されているベルト部のリング部が、その内径に対応する外径のテーパ膨張部の先端側に移動する。そのため、リンブ部が、ベルト部の元部側を連結させているテーパ膨張部の元部側におけるエアバッグ本体の下縁を引っ張ることとなり、その結果、エアバッグ本体の下縁側に張力が発揮される。
【００１８】
したがって、本発明に係る第３番目の頭部保護エアバッグ装置のエアバッグでも、エアバッグ本体の下縁側に特に張力を発揮させることができて、乗員拘束時、エアバッグの車外側への移動を抑えることができる。
【００１９】
本発明に係る第４番目の頭部保護エアバッグ装置のエアバッグでは、展開膨張時、折り畳まれた棒状膨張部が下方へ膨らむように膨張すれば、ベルト部のループ部が、折り畳んだ棒状膨張部をくるんでおり、ループ部が拡径するように、ベルト部の元部側を棒状膨張部側に引き込む。そのため、ループ部が、ベルト部の元部側を連結させている棒状膨張部の元部側におけるエアバッグ本体の下縁を引っ張ることとなり、その結果、エアバッグ本体の下縁側に張力が発揮される。
【００２０】
したがって、本発明に係る第４番目の頭部保護エアバッグ装置のエアバッグでも、エアバッグ本体の下縁側に特に張力を発揮させることができて、乗員拘束時、エアバッグの車外側への移動を抑えることができる。
【００２１】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明すると、図１〜４に示す第１実施形態のエアバッグ２０は、車内側のドアや窓部の開口Ｗの上縁におけるフロントピラー部ＰＦから、センターピラー部ＰＣの上部のルーフサイドレール部Ｒを経て、リヤピラー部ＰＲまで延びるように配設される頭部保護エアバッグ装置Ｍ１に、使用されるものである。
【００２２】
頭部保護エアバッグ装置Ｍ１は、エアバッグ２０と、インフレーター１６と、取付ブラケット１７と、エアバッグカバー１１と、を備えて構成されている。
【００２３】
インフレーター１６は、折り畳まれたエアバッグ２０に膨張用ガスを供給するシリンダタイプとしており、エアバッグ２０の後述するガス流入部２３が外装されることとなる。
【００２４】
取付ブラケット１７は、板金製として、エアバッグ２０のガス流入部２３を外装させたインフレーター１６を、ガス流入部２３ごと外周側から挟持し、２本の取付ボルト１８を利用して、リヤピラー部ＰＲのボディ１側の本体９に取り付けることとなる。
【００２５】
エアバッグカバー１１は、フロントピラー部ＰＦに配置されるフロントピラーガーニッシュ１２と、ルーフサイドレール部Ｒに配置されるルーフ内装材１３と、リヤピラー部ＰＲに配置されるリヤピラーガーニッシュ１４の後パネル１４ｂと、から構成されている。フロントピラーガーニッシュ１２は、合成樹脂製として、図１・２に示すように、図示しない取付手段によって、フロントピラー本体４のインナパネル７に取付固定され、エアバッグ２０の膨張時に、エアバッグ２０を突出可能にドア部１２ａが押されて開くように構成されている。ルーフ内装材１３も、合成樹脂製として、図１・３に示すように、図示しない取付手段によって、板金製のルーフサイドレール本体８に取付固定されている。そして、このルーフ内装材１３も、エアバッグ２０の膨張時に、エアバッグ２０を突出可能にドア部１３ａが押されて開くように構成されている。さらに、リヤピラーガーニッシュ１４は、図１・４に示すように、合成樹脂製の前・後パネル１４ａ・１４ｂから構成され、前・後パネル１４ａ・１４ｂは、それぞれ、図示しない取付手段によって、板金製のリヤーピラー本体９に取付固定されている。なお、フロントピラー本体４は、それぞれ板金製のリーンフォースパネル５、アウタパネル６、及び、インナパネル７から構成され、ルーフサイドレール本体８やリヤピラー本体９、あるいは、フロントピラー部ＰＦの下部のサイドパネル２とともに、ボディ１を構成することとなる。
【００２６】
エアバッグ２０は、図５〜８に示すように、可撓性を有した袋状として、ポリアミド糸等を使用した袋織りによって形成されるエアバッグ本体２１と、エアバッグ本体２１の前端側に固着される可撓性を有したベルト部３５と、を備えて構成されている。
【００２７】
エアバッグ本体２１は、インフレーター１６からの膨張用ガスを流入させて、折り畳み状態から展開して、厚さを増すように膨張する膨張部２２と、膨張用ガスを流入させない非膨張部２９と、を備えて構成されている。なお、エアバッグ本体２１では、袋織りして各部２２・２９を形成した後、耐熱性とシール性とを高めるために、表面側にシリコン等を塗布しても良い。
【００２８】
膨張部２２は、ガス流入部２３、後膨張部２４、連通部２５、及び、前膨張部２６から構成されている。後・前膨張部２４・２６は、エアバッグ２０の展開膨張時、それぞれ、車両の後席と前席との側方付近の開口Ｗを覆うように配設されている。
【００２９】
ガス流入部２３は、後端を開口させた円筒形状として、膨張部２２の後端側に配置されている。ガス流入部２３は、インフレーター１６を挿入させ、取付ブラケット１７によって、インフレーター１６側に締め付けられることにより、インフレーター１６と連結されることとなる。なお、ガス流入部２３の内周面側には、耐熱性を確保するために、別途、エアバッグ本体２１自体と同じ材料等から形成したインナチューブを固着させても良い。
【００３０】
後膨張部２４は、ガス流入部２３と上部で連通されて、非膨張部２９の後述する２個の後規制部３１ａ・３１ａによって上下方向に三室に分割された分割室２４ａ・２４ｂ・２４ｃから、構成されている。
【００３１】
前膨張部２６は、後膨張部２４の上部から延びる連通部２５と上部を連通させて、非膨張部２９の後述する２個の前規制部３１ｂ・３１ｃによって上下方向に三室に分割された分割室２６ａ・２６ｂ・２６ｃから、構成されている。そして、実施形態の場合には、各分割室２６ａ・２６ｂ・２６ｃの前端側が、張力発揮用膨張部２７を構成している。
【００３２】
非膨張部２９は、エアバッグ本体２１の外周縁で気密性を確保できるように密に織成される周縁部３０と、後・前膨張部２４・２６の領域に侵入するように配置される規制部３１と、後・前膨張部２４・２６の下部相互間を連結するように配設される板状部３３と、から構成されている。規制部３１は、後・前膨張部２４・２６の膨張時の厚さを略一定にするために配設されるものであり、周縁部３０の後縁３０ａから後膨張部２４内に延びる上下二段の後規制部３１ａ・３１ａと、周縁部３０の上縁３０ｂの中央付近から斜め前下方向で前膨張部２６内に延びる前規制部３１ｂと、周縁部３０から離れて前規制部３１ｂの下方で前規制部３１ｂと平行に延びる前規制部３１ｃと、から構成されている。板状部３３は、エアバッグ本体２１の膨張部２２の容積を少なくして、エアバッグ本体２１の外形形状を確保するために配設されている。
【００３３】
そして、非膨張部２９における張力発揮用膨張部２７の部位には、前規制部３１ｂ・３１ｃの前端と周縁部３０の下縁３０ｃにおける先端部３０ｄとの部位に、車内側と車外側とを連通させるように、ベルト部３５を挿通させる挿通孔３２が形成されている。
【００３４】
また、周縁部３０の上縁３０ｂ側には、複数の取付部３４が形成されている。各取付部３４には、それぞれ、中央に、取付ボルト４１（図１〜３参照）を挿通させる取付孔３４ａが袋織り後の孔明け加工により形成されている。また、各取付部３４には、図１〜３に示すように、折り畳まれたエアバッグ２０をボディ１のインナパネル７やルーフサイドレール本体８に取り付けるための板金製の取付ブラケット４０が固定されることとなる。
【００３５】
各取付ブラケット４０は、取付部３４を間にした車内側の内プレート４０ａと車外側の外プレート４０ｂとから構成され、内・外プレート４０ａ・４０ｂの間に各取付部３４を介在させて、内・外プレート４０ａ・４０ｂ相互を部分的にかしめて各取付部３４に取り付けている。内・外プレート４０ａ・４０ｂには、各取付部３４の取付孔３４ａに対応する取付孔４０ｃが貫通されている。そして、図２・３に示すように、取付ボルト４１を、取付孔４０ｃ・３４ａに挿通させて、インナパネル７やルーフサイドレール本体８の取付孔７ａ・８ａ周縁に固着されたナット７ｂ・８ｂに螺合させることにより、折り畳まれたエアバッグ本体２１がボディ１に取り付けられることとなる。
【００３６】
ベルト部３５は、可撓性を有したポリアミド糸等の織布から形成された帯状として構成されている。そして、図５・７に示すように、ベルト部３５の元部３６が、張力発揮用膨張部２７の上縁側における周縁部上縁３０ｂの車内側に縫合して固着され、元部３６から先端部３８側に向う中間部３７が、張力発揮用膨張部２７における分割室２６ａの車内側の面に沿って下方に延びて、前規制部３１ｂの挿通孔３２を挿通し、ついで、分割室２６ｂの車外側の面に沿って下方に延びて、前規制部３１ｃの挿通孔３２を挿通し、さらに、分割室２６ｃの車内側の面に沿って下方に延びて、周縁部下縁３０ｃにおける先端部３０ｄの挿通孔３２を挿通している。そして、先端部３８が、エアバッグ本体２１から離れた開口Ｗの周縁におけるフロントピラー本体４の下方のサイドパネル２にボルト３９止め（図１参照）されている。先端部３８には、取付ボルト３９を挿通させる取付孔３８ａが形成されている。
ベルト部３５の長さは、エアバッグ本体２１を単体で車両へ取り付けた際の展開膨張状態での、上方側の元部３６の固着部位から、前規制部３１ｂの挿通孔３２・前規制部３１ｃの挿通孔３２・周縁部下縁先端部３０ｄの挿通孔３２を経た分割室２６ａの車内側周面・分割室２６ｂの車外側周面・分割室２６ｃの車内側周面の長さと、周縁部下縁先端部３０ｄの挿通孔３２からベルト部先端部３８の開口Ｗの周縁への固着部位までの長さと、を合計した長さより、所定寸法小さく設定されて、ベルト部３５を連結したエアバッグ本体２１の展開膨張時に、後述するように、ベルト部３５に張力が発生するように設定されている。
【００３７】
つぎに、第１実施形態のエアバッグ２０を車両に装着する作業について説明すると、まず、エアバッグ２０を折り畳む。エアバッグ２０を折り畳む際には、図５に示す非膨張の展開状態から、エアバッグ本体２１の周縁部３０の上縁３０ｂに沿う前後方向の折目Ｃ１を多数付けて、エアバッグ２０の下縁２１ａ側から上縁３０ｂ側へ蛇腹折りする。この蛇腹折りの折目Ｃ１間の折り幅Ｂ１は、平らに展開した状態での張力発揮用膨張部２７における各分割室２６ａ・２６ｂ・２６ｃの上下方向の高さ寸法ｈ１より小さい寸法で折り畳む。実施形態では、折り幅Ｂ１は、高さ寸法ｈ１の１／３程度である。
【００３８】
そして、折り畳んだ後には、折り崩れしないように、所定間隔で破断可能なテープ材を巻き付けておく。
【００３９】
また、折り畳んだ後には、各取付部３４に取付ブラケット４０を取り付けるとともに、ガス流入部２３にインフレーター１６を挿入し、ガス流入部２３の外周に取付ブラケット１７を取り付けて、エアバッグ組立体を形成しておき、車両への取付待機状態としておく。なお、ベルト部３５は、先端部３８の車両への取り付けを考慮して、引っ張り出しておく。その際、エアバッグ本体２１の蛇腹折りの折目Ｃ１間の折り幅Ｂ１が、張力発揮用膨張部２７の各分割室２６ａ・２６ｂ・２６ｃの高さ寸法ｈ１より小さく設定されており、ベルト部３５の中間部３７を張力発揮用膨張部２７の折り畳み形状に沿わせて折り畳んだとしても、折り崩れを生じさせることなく、挿通孔３２・３２・３２間を最短距離で結ぶように折目Ｃ１から離脱させて、ベルト部３５の先端部３８側を引っ張り出すことができる。
【００４０】
その後、取付ブラケット１７をリヤピラー本体９の所定位置に配置させて、ボルト１８止めし、各取付ブラケット４０をインナパネル７やルーフサイドレール本体８の所定位置に配置させてボルト４１止めして、さらに、ベルト部３５の先端部３８をボルト３９止めする。そして、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４をボディ１に取り付ければ、頭部保護エアバッグ装置Ｍ１を車両に装着することができる。
【００４１】
ちなみに、ベルト部３５の先端部３８をサイドパネル２にボルト３９止めする際、エアバッグ本体２１が周縁部３０の上縁３０ｂ側に収縮するように蛇腹折りされ、その折り幅Ｂ１もベルト部３５の先端部３８側を繰り出させるように小さいことから、張力を生じさせずに、先端部３８を円滑にサイドパネル２に取付固定することができる。
【００４２】
そして、車両への装着後、インフレーター１６が作動されれば、インフレーター１６からの膨張用ガスＧが、図６に示すように、ガス流入部２３を経て後膨張部２４・連通部２５・前膨張部２６に流入することとなる。その際、エアバッグ本体２１は、巻き付けていた図示しないテープ材を破断させるとともに、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４の後パネル１４ｂを押して、それぞれのドア部１２ａ・１３ａ・１４ｃを開かせ、図１〜４の二点鎖線で示すように、開口Ｗを覆うように、大きく膨張することとなる。
【００４３】
第１実施形態のエアバッグ２０では、この膨張用ガスＧの流入時、エアバッグ本体２１の張力発揮用膨張部２７が膨張すれば、前規制部３１ｂ・３１ｃや周縁部下縁先端部３０ｄの挿通孔３２を経て張力発揮用膨張部２７の外周面に沿って配置されたベルト部元部３６側の中間部３７が、張力発揮用膨張部２７の膨張にともなって、張力発揮用膨張部２７の下縁先端部３０ｄ側の挿通孔３２Ｂを挿通しているベルト部３５の先端部３８側を引き込む。そのため、ベルト部３５に張力が発生することとなって、ベルト部３５が、張力発揮用膨張部２７の下縁先端部３０ｄ側の挿通孔３２Ｂ付近を、開口Ｗの周縁に連結させた先端部３８側に、引っ張り、エアバッグ本体２１の下縁２１ａ側に前方側への引張力Ｆ０が発揮される。
【００４４】
したがって、第１実施形態の頭部保護エアバッグ装置Ｍ１のエアバッグ２０では、エアバッグ本体２１の下縁２１ａ側に特に張力を発揮させることができて、乗員拘束時、エアバッグ２０の車外側への移動を抑えることができる。
【００４５】
なお、第１実施形態では、エアバッグ本体２１は、図１の二点鎖線で示すように、センターピラー部ＰＣの車内側に膨張することから、乗員を拘束しても、センターピラー部ＰＣに支持されて、一層、車外側に移動する虞れは生じない。
【００４６】
また、第１実施形態では、ベルト部３５が引っ張るエアバッグ本体２１の下縁先端部３０ｄの上部に、各分割室２６ａ・２６ｂ・２６ｃの前端で構成される上下方向に柱状に膨張する縦棒膨張部２８が配置されている（図６参照）。そのため、エアバッグ本体２１の展開膨張時におけるベルト部３５が張力を発揮した際には、縦棒膨張部２８が、剛性を有した棒状の状態となっており、その上端を中心として、縦棒膨張部２８の下端を前方に回転させるような回転トルクを発生させることから、展開膨張時のエアバッグ本体２１の上下方向の寸法を縮めることなく、効果的に、エアバッグ本体２１の下縁２１ａ側に張力を発揮させることができる。
【００４７】
さらに、第１実施形態のエアバッグ２０では、張力発揮用膨張部２７の外周面に沿わせるベルト部３５を、張力発揮用膨張部２７における車内側の面若しくは車外側の面での各分割室２６ａ・２６ｂ・２６ｃの全てに沿わせて配置させた場合を示したが、元部３６を張力発揮用膨張部２７の上縁３０ｂに固着させ、中間部３７を張力発揮用膨張部２７の下縁先端部３０ｄの挿通孔３２Ｂに直接挿通させて、サイドパネル２に先端部３８を固着させても良い。
【００４８】
さらにまた、第１実施形態では、エアバッグ本体２１の膨張部２２における後端側にガス流入部２３を配置させて、膨張部２２の前端側に張力発揮用膨張部２７を配設した場合を示したが、ガス流入部２３をフロントピラー部ＰＦに配置させ、ベルト部３５を対応させて、張力発揮用膨張部２７をエアバッグ本体２１の後端側に配置させても良い。
【００４９】
つぎに、第２実施形態のエアバッグ５０について説明する。第２実施形態のエアバッグ５０は、図９に示すように、第１実施形態のエアバッグ２０と同様に、頭部保護エアバッグ装置Ｍ２に使用されるものである。この頭部保護エアバッグ装置Ｍ２は、エアバッグ５０がエアバッグ装置Ｍ１のエアバッグ２０と異なる他、他のエアバッグカバー１１・インフレーター１６・取付ブラケット１７・４０等が同一であり、それらに同一符号を付して説明を省略する。
【００５０】
そして、エアバッグ５０は、図９〜１２に示すように、可撓性を有した袋状として、ポリアミド糸等を使用した袋織りによって形成されている。エアバッグ５０は、インフレーター１６からの膨張用ガスを流入させて、折り畳み状態から展開して、厚さを増すように膨張する膨張部５２と、膨張用ガスを流入させない非膨張部５９と、を備えて構成されている。なお、このエアバッグ５０でも、袋織りして各部５２・５９を形成した後、耐熱性とシール性とを高めるために、表面側にシリコン等を塗布しても良い。
【００５１】
膨張部５２は、ガス流入部５３、後膨張部５４、連通部５５、前膨張部５６、及び、連通膨張部５７から構成されている。後・前膨張部５４・５６は、相互の前後方向に離れて配置されて、エアバッグ５０の展開膨張時、それぞれ、車両の後席と前席との側方付近の開口Ｗを覆うように配設されている。
【００５２】
ガス流入部５３は、後端を開口させた円筒形状として、膨張部５２の後端側に配置されている。ガス流入部５３は、インフレーター１６を挿入させ、取付ブラケット１７によって、インフレーター１６側に締め付けられることにより、インフレーター１６と連結されることとなる。なお、ガス流入部５３の内周面側にも、耐熱性を確保するために、別途、エアバッグ５０自体と同じ材料等から形成したインナチューブを固着させても良い。
【００５３】
後膨張部５４は、ガス流入部５３と上部で連通されて、非膨張部５９の後述する２個の後規制部６１ａ・６１ａによって上下方向に三室に分割された分割室５４ａ・５４ｂ・５４ｃから、構成されている。
【００５４】
前膨張部５６は、後膨張部５４の上部から延びる連通部５５と上部を連通させて、非膨張部５９の後述する２個の前規制部６１ｂ・６１ｃによって上下方向に三室に分割された分割室５６ａ・５６ｂ・５６ｃから、構成されている。
【００５５】
連通膨張部５７は、前膨張部５６と後膨張部５４との間の下部側で、前膨張部５６と後膨張部５４とを前後方向に連通するように、上下方向に複数（実施形態では５個）並設されている。各連通膨張部５７の寸法形状は、各連通膨張部５７の展開膨張時、後・前膨張部５４・５６の対向する下縁５４ｄ・５６ｄを、相互に接近可能な寸法に設定されている。ちなみに、この各連通膨張部５７の寸法形状の設定は、図１０に示すように、立体裁断することなく、エアバッグ５０を非膨張の平らに展開した状態で、各連通膨張部５７を単に前後方向に配設するように、設定すれば良い。実施形態の場合には、エアバッグ５０を袋織りで形成しており、第１実施形態のエアバッグ２０における板状部３３の部位の相当する部位の袋織り時、図１２に示すように、車内側の壁部５０ａと車外側の壁部５０ｂとに単に分離させるように織成するだけで良い。
【００５６】
非膨張部５９は、エアバッグ５０の外周縁で気密性を確保できるように密に織成される周縁部６０と、後・前膨張部５４・５６の領域に侵入するように配置される規制部６１と、から構成されている。規制部６１は、周縁部６０の後縁６０ａから後膨張部５４内に延びる上下二段の後規制部６１ａ・６１ａと、周縁部６０の上縁６０ｂの中央付近から斜め前下方向で前膨張部５６内に延びる前規制部６１ｂと、周縁部６０から離れて前規制部６１ｂの下方で前規制部６１ｂと平行に延びる前規制部６１ｃと、各連通膨張部５７を区画する区画規制部６１ｄと、から構成されている。周縁部６０の上縁６０ｂ側には、取付ブラケット４０を取り付けるための取付孔６４ａを備えた複数の取付部６４が形成されている。
【００５７】
つぎに、第２実施形態のエアバッグ５０を車両に装着する作業について説明すると、第１実施形態と同様に、まず、周縁部６０の上縁６０ｂに沿う前後方向の折目を多数付けて、エアバッグ５０の下縁６０ｃから上縁６０ｂ側へ蛇腹折りする。折り畳んだ後には、折り崩れしないように、所定間隔で破断可能なテープ材を巻き付けておく。
【００５８】
そして、折り畳んだ後には、各取付部６４に取付ブラケット４０を取り付けるとともに、ガス流入部５３にインフレーター１６を挿入し、ガス流入部５３の外周に取付ブラケット１７を取り付けて、エアバッグ組立体を形成しておき、車両への取付待機状態としておく。
【００５９】
その後、取付ブラケット１７をリヤピラー本体９の所定位置に配置させて、ボルト１８止めし、各取付ブラケット４０をインナパネル７やルーフサイドレール本体８の所定位置に配置させてボルト４１止めする。そして、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４をボディ１に取り付ければ、頭部保護エアバッグ装置Ｍ２を車両に装着することができる。
【００６０】
そして、車両への装着後、インフレーター１６が作動されれば、インフレーター１６からの膨張用ガスＧが、図１１に示すように、ガス流入部５３を経て後膨張部５４・連通部５５・前膨張部５６・連通膨張部５７に流入することとなる。その際、エアバッグ５０は、巻き付けていた図示しないテープ材を破断させるとともに、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４の後パネル１４ｂを押して、それぞれのドア部１２ａ・１３ａ・１４ｃを開かせ、図９の二点鎖線で示すように、開口Ｗを覆うように、大きく膨張することとなる。
【００６１】
第２実施形態のエアバッグ５０では、この膨張用ガスＧの流入時、後膨張部５４と前膨張部５６とが展開膨張して、複数の連通膨張部５７も膨張すると、連通膨張部５７の配置部位では、上下方向と前後方向とでそれぞれの長さを短くするように、張力ＦＶ・ＦＨが生ずる。そして、複数の連通膨張部５７は、エアバッグ５０の下部側の配置されているため、張力ＦＶ・ＦＨの合力ＦＤによって、後膨張部５４と前膨張部５６との対向する下縁５４ｄ・５６ｄ相互を接近させるように、引っ張り、その結果、エアバッグ５０の下縁６０ｃ側に、前後端を中央付近に引っ張る引張力Ｆ０が発揮される。
【００６２】
したがって、第２実施形態の頭部保護エアバッグ装置Ｍ２のエアバッグ５０でも、エアバッグ５０の下縁６０ｃ側に特に張力を発揮させることができて、乗員拘束時、エアバッグ５０の車外側への移動を抑えることができる。
【００６３】
つぎに、第３実施形態のエアバッグ７０について説明する。第３実施形態のエアバッグ７０は、図１３に示すように、第１実施形態のエアバッグ２０と同様に、頭部保護エアバッグ装置Ｍ３に使用されるものである。この頭部保護エアバッグ装置Ｍ３は、エアバッグ７０がエアバッグ装置Ｍ１のエアバッグ２０と異なる他、他のエアバッグカバー１１・インフレーター１６・取付ブラケット１７・４０等が同一であり、それらに同一符号を付して説明を省略する。
【００６４】
エアバッグ７０は、図１４・１５・１７に示すように、第１実施形態のエアバッグ２０と同様に、可撓性を有した袋状として、ポリアミド糸等を使用した袋織りによって形成されるエアバッグ本体７１と、エアバッグ本体７１の前端側に固着される可撓性を有したベルト部８５と、を備えて構成されている。
【００６５】
エアバッグ本体７１は、インフレーター１６からの膨張用ガスを流入させて、折り畳み状態から展開して、厚さを増すように膨張する膨張部７２と、膨張用ガスを流入させない非膨張部７９と、を備えて構成されている。なお、エアバッグ本体７１でも、第１実施形態のエアバッグ本体２１と同様に、袋織りして各部７２・７９を形成した後、耐熱性とシール性とを高めるために、表面側にシリコン等を塗布しても良い。
【００６６】
膨張部７２は、ガス流入部７３、後膨張部７４、連通部７５、及び、前膨張部７６から構成されている。後・前膨張部７４・７６は、エアバッグ７０の展開膨張時、それぞれ、車両の後席と前席との側方付近の開口Ｗを覆うように配設されている。
【００６７】
ガス流入部７３は、後端を開口させた円筒形状として、膨張部７２の後端側に配置されている。ガス流入部７３は、インフレーター１６を挿入させ、取付ブラケット１７によって、インフレーター１６側に締め付けられることにより、インフレーター１６と連結されることとなる。なお、ガス流入部７３の内周面側にも、耐熱性を確保するために、別途、エアバッグ本体７１自体と同じ材料等から形成したインナチューブを固着させても良い。
【００６８】
後膨張部７４は、ガス流入部７３と上部で連通されて、非膨張部７９の後述する２個の後規制部８１ａ・８１ａによって上下方向に三室に分割された分割室７４ａ・７４ｂ・７４ｃから、構成されている。
【００６９】
前膨張部７６は、後膨張部７４の上部から延びる連通部７５と上部を連通させて、非膨張部７９の後述する２個の前規制部８１ｂ・８１ｃによって上下方向に三室に分割された分割室７６ａ・７６ｂ・７６ｃから、構成されている。そして、実施形態の場合、前膨張部７６の上部の分割室７６ａは、分割室７６ｂ・７６ｃより前方側へ突出させており、その前端側の前半分を、突出膨張部７７としている。
【００７０】
非膨張部７９は、エアバッグ本体７１の外周縁で気密性を確保できるように密に織成される周縁部８０と、後・前膨張部７４・７６の領域に侵入するように配置される規制部８１と、後・前膨張部７４・７６の下部相互間を連結するように配設される板状部８３と、から構成されている。規制部８１は、周縁部８０の後縁８０ａから後膨張部７４内に延びる上下二段の後規制部８１ａ・８１ａと、周縁部８０の上縁８０ｂの中央付近から斜め前下方向で前膨張部７６内に延びる前規制部８１ｂと、周縁部８０から離れて前規制部８１ｂの下方で前規制部８１ｂと平行に延びる前規制部８１ｃと、から構成されている。また、周縁部８０の上縁８０ｂ側には、取付ブラケット４０を取り付けるための取付孔８４ａを備えた複数の取付部８４が形成されている。
【００７１】
ベルト部８５は、第１実施形態のベルト部３５と同様に、可撓性を有したポリアミド糸等の織布から形成された帯状として構成されている。そして、図１４・１５に示すように、ベルト部８５の元部８６が、突出膨張部７７の元部側におけるエアバッグ本体７１の下縁側、すなわち、周縁部下縁８０ｃの先端部８０ｄに固着され、ベルト部８５の先端部８８が、突出膨張部７７の突出端側、すなわち、周縁部８０の前縁先端部８０ｅに固着されている。
【００７２】
このベルト部８５の長さは、エアバッグ体体７１を単体で車両へ取り付けた際の展開膨張時における突出膨張部７７が突出した状態での、周縁部８０における下縁先端部８０ｄから前縁先端部８０ｅまでの長さより、所定寸法小さく設定されて、ベルト部８５を固着させたエアバッグ本体７１の展開膨張時において、後述するように、ベルト部８５に張力が発生するように設定されている。
【００７３】
つぎに、第３実施形態のエアバッグ７０を車両に装着する作業について説明すると、まず、図１５に示すように、突出膨張部７７を分割室７６ａの内部に折り込むようにカクタス折りで折り畳む。なお、この時、前縁先端部８０ｅは、折り込まれた分割室７６ａの前端側に配置させておく。ついで、第１実施形態と同様に、周縁部８０の上縁８０ｂに沿う前後方向の折目を多数付けて、エアバッグ７０の下縁８０ｃから上縁８０ｂ側へ蛇腹折りする。折り畳んだ後には、折り崩れしないように、所定間隔で破断可能なテープ材を巻き付けておく。
【００７４】
そして、折り畳んだ後には、各取付部８４に取付ブラケット４０を取り付けるとともに、ガス流入部７３にインフレーター１６を挿入し、ガス流入部７３の外周に取付ブラケット１７を取り付けて、エアバッグ組立体を形成しておき、車両への取付待機状態としておく。
【００７５】
その後、取付ブラケット１７をリヤピラー本体９の所定位置に配置させて、ボルト１８止めし、各取付ブラケット４０をインナパネル７やルーフサイドレール本体８の所定位置に配置させてボルト４１止めする。そして、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４をボディ１に取り付ければ、頭部保護エアバッグ装置Ｍ３を車両に装着することができる。
【００７６】
そして、車両への装着後、インフレーター１６が作動されれば、インフレーター１６からの膨張用ガスＧが、図１７に示すように、ガス流入部７３を経て後膨張部７４・連通部７５・突出膨張部７７を含めた前膨張部７６に流入することとなる。その際、エアバッグ７０は、巻き付けていた図示しないテープ材を破断させるとともに、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４の後パネル１４ｂを押して、それぞれのドア部１２ａ・１３ａ・１４ｃを開かせ、図１３の二点鎖線で示すように、開口Ｗを覆うように、大きく膨張することとなる。
【００７７】
第３実施形態のエアバッグ７０では、この膨張用ガスＧの流入時、エアバッグ本体７１の突出膨張部７７が、折り畳まれた状態からエアバッグ本体７１から遠ざかる前方側に突出するように膨張する。そのため、突出膨張部７７の突出端側である周縁部８０の前縁先端部８０ｅに固着されたベルト部８５が、その元部８６側を固着させたエアバッグ本体７１の下縁７１ａ側の周縁部下縁８０ｃの先端部８０ｄを前方に引っ張ることとなり、その結果、エアバッグ本体７１の下縁７１ａ側に前方側への引張力Ｆ０が発揮される。
【００７８】
そのため、第３実施形態の頭部保護エアバッグ装置Ｍ３のエアバッグ７０でも、エアバッグ本体７１の下縁７１ａ側に特に張力を発揮させることができて、乗員拘束時、エアバッグ７０の車外側への移動を抑えることができる。
【００７９】
また、第３実施形態でも、ベルト部８５が引っ張るエアバッグ本体７１の下縁先端部８０ｄの上部に、各分割室７６ａ・７６ｂ・７６ｃの前端で構成される上下方向に柱状に膨張する縦棒膨張部７８が配置されている（図１７参照）。そのため、エアバッグ本体７１の展開膨張時におけるベルト部８５が張力を発揮した際には、縦棒膨張部７８が、剛性を有した棒状の状態となっており、その上端を中心として、縦棒膨張部７８の下端を前方に回転させるような回転トルクを発生させることから、展開膨張時のエアバッグ本体７１の上下方向の寸法をほとんど縮めることなく、効果的に、エアバッグ本体７１の下縁７１ａ側に張力を発揮させることができる。
【００８０】
なお、実施形態では、突出膨張部７７を折り畳む際、カクタス折りした場合を示したが、展開膨張時にエアバッグ本体７１から遠ざかる前後方向に突出するように膨張可能として折り畳めれば、突出膨張部７７を後方側に蛇腹折りしたり、あるいは、図１６に示すように、車内側の後方側へ折り返すだけでも良い。
【００８１】
また、第３実施形態では、エアバッグ本体７１の膨張部７２における後端側にガス流入部７３を配置させて、膨張部７２の前端上部に突出膨張部７７を配設した場合を示したが、ガス流入部７３をフロントピラー部ＰＦに配置させ、ベルト部８５を対応させて、突出膨張部７７をエアバッグ本体７１の後端上部に配置させても良い。
【００８２】
つぎに、第４実施形態のエアバッグ９０について説明する。第４実施形態のエアバッグ９０は、図１８に示すように、第１実施形態のエアバッグ２０と同様に、頭部保護エアバッグ装置Ｍ４に使用されるものである。この頭部保護エアバッグ装置Ｍ４も、エアバッグ９０がエアバッグ装置Ｍ１のエアバッグ２０と異なる他、他のエアバッグカバー１１・インフレーター１６・取付ブラケット１７・４０等が同一であり、それらに同一符号を付して説明を省略する。
【００８３】
エアバッグ９０は、図１９〜２２に示すように、第１実施形態のエアバッグ２０と同様に、可撓性を有した袋状として、ポリアミド糸等を使用した袋織りによって形成されるエアバッグ本体９１と、エアバッグ本体９１の前端側に連結される可撓性を有したベルト部１０５と、を備えて構成されている。
エアバッグ本体９１は、インフレーター１６からの膨張用ガスを流入させて、折り畳み状態から展開して、厚さを増すように膨張する膨張部９２と、膨張用ガスを流入させない非膨張部９９と、を備えて構成されている。なお、エアバッグ本体９１でも、第１実施形態のエアバッグ本体２１と同様に、袋織りして各部９２・９９を形成した後、耐熱性とシール性とを高めるために、表面側にシリコン等を塗布しても良い。
【００８４】
膨張部９２は、ガス流入部９３、後膨張部９４、連通部９５、及び、前膨張部９６から構成されている。後・前膨張部９４・９６は、エアバッグ９０の展開膨張時、それぞれ、車両の後席と前席との側方付近の開口Ｗを覆うように配設されている。
【００８５】
ガス流入部９３は、後端を開口させた円筒形状として、膨張部９２の後端側に配置されている。ガス流入部９３は、インフレーター１６を挿入させ、取付ブラケット１７によって、インフレーター１６側に締め付けられることにより、インフレーター１６と連結されることとなる。なお、ガス流入部９３の内周面側にも、耐熱性を確保するために、別途、エアバッグ本体９１自体と同じ材料等から形成したインナチューブを固着させても良い。
【００８６】
後膨張部９４は、ガス流入部９３と上部で連通されて、非膨張部９９の後述する２個の後規制部１０１ａ・１０１ａによって上下方向に三室に分割された分割室９４ａ・９４ｂ・９４ｃから、構成されている。
【００８７】
前膨張部９６は、後膨張部９４の上部から延びる連通部９５と上部を連通させて、非膨張部９９の後述する２個の前規制部１０１ｂ・１０１ｃによって上下方向に三室に分割された分割室９６ａ・９６ｂ・９６ｃから、構成されている。そして、実施形態の場合、前膨張部９６の上部の分割室９６ａには、分割室９６ｂ・９６ｃより前方側へ突出する前端側に、展開膨張時に先細り状に膨張するテーパ膨張部９７を配設させている。
【００８８】
非膨張部９９は、エアバッグ本体９１の外周縁で気密性を確保できるように密に織成される周縁部１００と、後・前膨張部９４・９６の領域に侵入するように配置される規制部１０１と、後・前膨張部９４・９６の下部相互間を連結するように配設される板状部１０３と、から構成されている。規制部１０１は、周縁部１００の後縁１００ａから後膨張部９４内に延びる上下二段の後規制部１０１ａ・１０１ａと、周縁部１００の上縁１００ｂの中央付近から斜め前下方向で前膨張部９６内に延びる前規制部１０１ｂと、周縁部１００から離れて前規制部１０１ｂの下方で前規制部１０１ｂと平行に延びる前規制部１０１ｃと、から構成されている。また、周縁部１００の上縁１００ｂには、取付ブラケット４０を取り付けるための取付孔１０４ａを備えた複数の取付部１０４が形成されている。なお、取付部１０４は、テーパ膨張部９７の先端部位にも配設されている。
【００８９】
ベルト部１０５は、可撓性を有したポリアミド糸等の織布から形成された帯状の先端部に、円環状のリング部１０８を配設させて構成されている。そして、図１９・２０に示すように、ベルト部１０５の元部１０６が、テーパ膨張部９７の元部側におけるエアバッグ本体９１の下縁側、すなわち、周縁部下縁１００ｃの先端部１００ｄに固着され、ベルト部１０５のリング部１０８がテーパ膨張部９７に外装されている。
【００９０】
このベルト部１０５のリング部１０８の内径寸法ｄ０は、図２１・２２に示すように、展開膨張時におけるテーパ膨張部９７の中間部位より先端側部位９７ａの外径寸法Ｄ０より僅かに大きくなるように、設定されている。
【００９１】
また、ベルト部１０５の元部１０６からリング部１０８までの長さは、エアバッグ本体９１を単体で車両へ取り付けた際の展開膨張状態での、周縁部１００における下縁先端部１００ｄからテーパ膨張部９７の先端側部位９７ａまでの長さより、所定寸法小さく設定されて、ベルト部１０５を固着させたエアバッグ本体９１の展開膨張時において、後述するように、ベルト部１０５に張力が発生するように設定されている。
【００９２】
つぎに、第４実施形態のエアバッグ９０を車両に装着する作業について説明すると、まず、図１９・２０に示すように、元部１０６をエアバッグ本体９１の下縁先端部１００ｄに固着させたベルト部１０５のリング部１０８をテーパ膨張部９７の元部側部位９７ｂに外装させた状態で、第１実施形態と同様に、周縁部１００の上縁１００ｂに沿う前後方向の折目を多数付けて、エアバッグ９０の下縁１００ｃから上縁１００ｂ側へ蛇腹折りする。折り畳んだ後には、折り崩れしないように、所定間隔で破断可能なテープ材を巻き付けておく。
【００９３】
そして、折り畳んだ後には、各取付部１０４に取付ブラケット４０を取り付けるとともに、ガス流入部９３にインフレーター１６を挿入し、ガス流入部９３の外周に取付ブラケット１７を取り付けて、エアバッグ組立体を形成しておき、車両への取付待機状態としておく。
【００９４】
その後、取付ブラケット１７をリヤピラー本体９の所定位置に配置させて、ボルト１８止めし、各取付ブラケット４０をインナパネル７やルーフサイドレール本体８の所定位置に配置させてボルト４１止めする。そして、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４をボディ１に取り付ければ、頭部保護エアバッグ装置Ｍ４を車両に装着することができる。
【００９５】
そして、車両への装着後、インフレーター１６が作動されれば、インフレーター１６からの膨張用ガスＧが、図２２に示すように、ガス流入部９３を経て後膨張部９４・連通部９５・テーパ膨張部９７を含めた前膨張部９６に流入することとなる。その際、エアバッグ９０は、巻き付けていた図示しないテープ材を破断させるとともに、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４の後パネル１４ｂを押して、それぞれのドア部１２ａ・１３ａ・１４ｃを開かせ、図１８の二点鎖線で示すように、開口Ｗを覆うように、大きく膨張することとなる。
【００９６】
第４実施形態のエアバッグ９０では、この膨張用ガスＧの流入時、テーパ膨張部９７が膨張すれば、そのテーパ膨張部９７に外装されているベルト部９５のリング部１０８が、テーパ膨張部９７における大径寸法の元部側部位９７ｂから、リング部１０８の内径寸法ｄ０に対応する外径寸法Ｄ０の先端側部位９７ａに、テーパ膨張部９７の外周面を滑るように前方側へ移動する。そのため、リング部１０８が、ベルト部１０５の元部１０６側を固着させているテーパ膨張部９７の元部側におけるエアバッグ本体９１の周縁部下縁先端部１００ｄを前方へ引っ張ることとなり、その結果、エアバッグ本体９１の下縁９１ａ側に前方側への引張力Ｆ０が発揮される。
【００９７】
したがって、第４実施形態の頭部保護エアバッグ装置Ｍ４のエアバッグ９０でも、エアバッグ本体９１の下縁９１ａ側に特に張力を発揮させることができて、乗員拘束時、エアバッグ９０の車外側への移動を抑えることができる。
【００９８】
また、第４実施形態でも、ベルト部１０５が引っ張るエアバッグ本体９１の下縁先端部１００ｄの上部に、各分割室９６ａ・９６ｂ・９６ｃの前端で構成される上下方向に柱状に膨張する縦棒膨張部９８が配置されている（図２２参照）。そのため、エアバッグ本体９１の展開膨張時におけるベルト部１０５が張力を発揮した際には、縦棒膨張部９８が、剛性を有した棒状の状態となっており、その上端を中心として、縦棒膨張部９８の下端を前方に回転させるような回転トルクを発生させることから、展開膨張時のエアバッグ本体９１の上下方向の寸法を縮めることなく、効果的に、エアバッグ本体９１の下縁９１ａ側に張力を発揮させることができる。
【００９９】
なお、実施形態では、エアバッグ本体９１の膨張部９２における後端側にガス流入部９３を配置させて、膨張部９２の前端上部にテーパ膨張部９７を配設した場合を示したが、ガス流入部９３をフロントピラー部ＰＦに配置させ、ベルト部１０５を対応させて、テーパ膨張部９７をエアバッグ本体９１の後端上部に配置させても良い。
【０１００】
つぎに、第５実施形態のエアバッグ１１０について説明する。第５実施形態のエアバッグ１１０は、図２３に示すように、第１実施形態のエアバッグ２０と同様に、頭部保護エアバッグ装置Ｍ５に使用されるものである。この頭部保護エアバッグ装置Ｍ５も、エアバッグ１１０がエアバッグ装置Ｍ１のエアバッグ２０と異なる他、他のエアバッグカバー１１・インフレーター１６・取付ブラケット１７・４０等が同一であり、それらに同一符号を付して説明を省略する。
【０１０１】
エアバッグ１１０は、図２４〜２７に示すように、第１実施形態のエアバッグ２０と同様に、可撓性を有した袋状として、ポリアミド糸等を使用した袋織りによって形成されるエアバッグ本体１１１と、エアバッグ本体１１１の前端側に連結される可撓性を有したベルト部１２５と、を備えて構成されている。
【０１０２】
エアバッグ本体１１１は、インフレーター１６からの膨張用ガスを流入させて、折り畳み状態から展開して、厚さを増すように膨張する膨張部１１２と、膨張用ガスを流入させない非膨張部１１９と、を備えて構成されている。なお、エアバッグ本体１１１でも、第１実施形態のエアバッグ本体２１と同様に、袋織りして各部１１２・１１９を形成した後、耐熱性とシール性とを高めるために、表面側にシリコン等を塗布しても良い。
【０１０３】
膨張部１１２は、ガス流入部１１３、後膨張部１１４、連通部１１５、及び、前膨張部１１６から構成されている。後・前膨張部１１４・１１６は、エアバッグ１１０の展開膨張時、それぞれ、車両の後席と前席との側方付近の開口Ｗを覆うように配設されている。
【０１０４】
ガス流入部１１３は、後端を開口させた円筒形状として、膨張部１１２の後端側に配置されている。ガス流入部１１３は、インフレーター１６を挿入させ、取付ブラケット１７によって、インフレーター１６側に締め付けられることにより、インフレーター１６と連結されることとなる。なお、ガス流入部１１３の内周面側にも、耐熱性を確保するために、別途、エアバッグ本体１１１自体と同じ材料等から形成したインナチューブを固着させても良い。
【０１０５】
後膨張部１１４は、ガス流入部１１３と上部で連通されて、非膨張部１１９の後述する２個の後規制部１２１ａ・１２１ａによって上下方向に三室に分割された分割室１１４ａ・１１４ｂ・１１４ｃから、構成されている。
【０１０６】
前膨張部１１６は、後膨張部１１４の上部から延びる連通部１１５と上部を連通させて、非膨張部１１９の後述する２個の前規制部１２１ｂ・１２１ｃによって上下方向に三室に分割された分割室１１６ａ・１１６ｂ・１１６ｃから、構成されている。そして、実施形態の場合、前膨張部１１６の上部の分割室１１６ａには、分割室１１６ｂ・１１６ｃより前方側へ突出する前端側に、展開膨張時に折りを解消して下方へ膨らむように膨張する棒状膨張部１１７を配設させている。
【０１０７】
非膨張部１１９は、エアバッグ本体１１１の外周縁で気密性を確保できるように密に織成される周縁部１２０と、後・前膨張部１１４・１１６の領域に侵入するように配置される規制部１２１と、後・前膨張部１１４・１１６の下部相互間を連結するように配設される板状部１２３と、から構成されている。規制部１２１は、周縁部１２０の後縁１２０ａから後膨張部１１４内に延びる上下二段の後規制部１２１ａ・１２１ａと、周縁部１２０の上縁１２０ｂの中央付近から斜め前下方向で前膨張部１１６内に延びる前規制部１２１ｂと、周縁部１２０から離れて前規制部１２１ｂの下方で前規制部１２１ｂと平行に延びる前規制部１２１ｃと、から構成されている。また、周縁部１２０の上縁１２０ｂには、取付ブラケット４０を取り付けるための取付孔１２４ａを備えた複数の取付部１２４が形成されている。なお、取付部１２４は、棒状膨張部１１７の先端部位にも配設されている。
【０１０８】
ベルト部１２５は、可撓性を有したポリアミド糸等の織布から形成された帯状として、先端部１２８が、他の部位より幅広となって、スリット１２８ａを備えている。スリット１２８ａには、先端部１２８から元部１２６側へ延びる中間部位が挿通されて、ループ部１２７が形成されている。そして、図２４・２５に示すように、ベルト部１２５の元部１２６が、棒状膨張部１１７の元部側におけるエアバッグ本体１１１の下縁側、すなわち、周縁部下縁１２０ｃの先端部１２０ｄに固着され、ループ部１２７が、折り畳まれた棒状膨張部１１７をくるむように、棒状膨張部１１７の中央部１１７ａに外装されている。
【０１０９】
このベルト部１２５の元部１２６から先端部１２８のスリット１２８ａまでの長さは、エアバッグ本体１１１を単体で車両へ取り付けた際の展開膨張状態での、周縁部１２０における下縁先端部１２０ｄから棒状膨張部１１７の中央部１１７ａ付近までの長さと中央部１１７ａの棒状膨張部１１７の外周面の長さとの合計の長さより、所定寸法小さく設定されて、ベルト部１２５を固着させたエアバッグ本体１１１の展開膨張時において、後述するように、ベルト部１２５に張力が発生するように設定されている。
【０１１０】
つぎに、第５実施形態のエアバッグ１１０を車両に装着する作業について説明すると、まず、第１実施形態と同様に、周縁部１２０の上縁１２０ｂに沿う前後方向の折目Ｃ２（図２４参照）を多数付けて、エアバッグ１１０の下縁１２０ｃから上縁１２０ｂ側へ蛇腹折りする。なお、この折目Ｃ２間の折り幅Ｂ２は、平らに展開した状態での棒状膨張部１１７の上下方向の高さ寸法ｈ２より小さい寸法で折り畳む。実施形態の場合には、折り幅Ｂ２は、高さ寸法ｈ２の１／３程度である。ついで、図２５に示すように、元部１２６をエアバッグ本体１１１の下縁先端部１２０ｄに固着させたベルト部１２５のループ部１２７を、棒状膨張部１１７の中央部１１７ａ付近に外装させる。その後、折り崩れしないように、折り畳んだエアバッグ本体１１１に、所定間隔で破断可能なテープ材を巻き付けておく。
【０１１１】
そして、各取付部１２４に取付ブラケット４０を取り付けるとともに、ガス流入部１１３にインフレーター１６を挿入し、ガス流入部１１３の外周に取付ブラケット１７を取り付けて、エアバッグ組立体を形成しておき、車両への取付待機状態としておく。
【０１１２】
その後、取付ブラケット１７をリヤピラー本体９の所定位置に配置させて、ボルト１８止めし、各取付ブラケット４０をインナパネル７やルーフサイドレール本体８の所定位置に配置させてボルト４１止めする。そして、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４をボディ１に取り付ければ、頭部保護エアバッグ装置Ｍ５を車両に装着することができる。
【０１１３】
そして、車両への装着後、インフレーター１６が作動されれば、インフレーター１６からの膨張用ガスＧが、図２７に示すように、ガス流入部１１３を経て後膨張部１１４・連通部１１５・棒状膨張部１１７を含めた前膨張部１１６に流入することとなる。その際、エアバッグ１１０は、巻き付けていた図示しないテープ材を破断させるとともに、フロントピラーガーニッシュ１２・ルーフ内装材１３・リヤピラーガーニッシュ１４の後パネル１４ｂを押して、それぞれのドア部１２ａ・１３ａ・１４ｃを開かせ、図２３の二点鎖線で示すように、開口Ｗを覆うように、大きく膨張することとなる。
【０１１４】
第５実施形態のエアバッグ１１０では、この膨張用ガスＧの流入時、棒状膨張部１１７が折りを解消して下方へ膨らむように膨張すれば、ベルト部１２５のループ部１２７が、棒状膨張部１１７をくるんでいるため、図２６・２７に示すように、ループ部１２７が拡径するように、ベルト部１２５の元部１２６側を棒状膨張部１１７の外周面側に引き込む。そのため、ループ部１２７が、ベルト部１２５の元部１２６側を連結させている棒状膨張部１１７の元部側におけるエアバッグ本体１１１の周縁部下縁先端部１２０ｄを、前方へ引っ張ることとなり、その結果、エアバッグ本体１１１の下縁１１１ａ側に前方側への引張力Ｆ０が発揮される。
【０１１５】
したがって、第５実施形態の頭部保護エアバッグ装置Ｍ５のエアバッグ１１０でも、エアバッグ本体１１１の下縁１１１ａ側に特に張力を発揮させることができて、乗員拘束時、エアバッグ１１０の車外側への移動を抑えることができることとなる。
【０１１６】
また、第５実施形態でも、ベルト部１２５が引っ張るエアバッグ本体１１１の下縁先端部１２０ｄの上部に、各分割室１１６ａ・１１６ｂ・１１６ｃの前端で構成される上下方向に柱状に膨張する縦棒膨張部１１８が配置されている（図２７参照）。そのため、エアバッグ本体１１１の展開膨張時におけるベルト部１２５が張力を発揮した際には、縦棒膨張部１１８が、剛性を有した棒状の状態となっており、その上端を中心として、縦棒膨張部１１８の下端を前方に回転させるような回転トルクを発生させることから、展開膨張時のエアバッグ本体１１１の上下方向の寸法をほとんど縮めることなく、効果的に、エアバッグ本体１１１の下縁１１１ａ側に張力を発揮させることができる。
【０１１７】
なお、実施形態では、エアバッグ本体１１１の膨張部１１２における後端側にガス流入部１１３を配置させて、膨張部１１２の前端上部に棒状膨張部１１７を配設した場合を示したが、ガス流入部１１３をフロントピラー部ＰＦに配置させ、ベルト部１２５を対応させて、棒状膨張部１１７をエアバッグ本体１１１の後端上部に配置させても良い。
【図面の簡単な説明】
【図１】本発明の第１実施形態のエアバッグが収納された状態を、車内側から見た正面図である。
【図２】図１のII−II部位の概略拡大断面図である。
【図３】図１の III− III部位の概略拡大断面図である。
【図４】図１のIV−IV部位の概略拡大断面図である。
【図５】同実施形態のエアバッグにおける非膨張時の展開状態を示す正面図である。
【図６】同実施形態のエアバッグ単体の膨張時の状態を示す正面図である。
【図７】同実施形態のエアバッグの非膨張時を示す縦断面図であり、図５の VII− VII部位の概略拡大断面図である。
【図８】同実施形態のエアバッグの展開膨張時を示す縦断面図であり、図６のVIII−VIII部位の概略拡大断面図である。
【図９】第２実施形態のエアバッグが収納された状態を、車内側から見た正面図である。
【図１０】同実施形態のエアバッグにおける非膨張時の展開状態を示す正面図である。
【図１１】同実施形態のエアバッグ単体の膨張時の状態を示す正面図である。
【図１２】同実施形態のエアバッグの展開膨張時を示す縦断面図であり、図１１の XII− XII部位の拡大断面図である。
【図１３】第３実施形態のエアバッグが収納された状態を、車内側から見た正面図である。
【図１４】同実施形態のエアバッグにおける非膨張時の展開状態を示す正面図であり、突出膨張部を折り畳んだ状態を示す。
【図１５】同実施形態のエアバッグにおける突出膨張部の折り畳み状態を示す横断面図であり、図１４のXV−XV部位の拡大断面図である。
【図１６】同実施形態のエアバッグにおける突出膨張部の折り畳み状態の変形例を示す横断面図である。
【図１７】同実施形態のエアバッグ単体の膨張時の状態を示す正面図である。
【図１８】第４実施形態のエアバッグが収納された状態を、車内側から見た正面図である。
【図１９】同実施形態のエアバッグにおける非膨張時の展開状態を示す正面図である。
【図２０】同実施形態のエアバッグの非膨張時を示す縦断面図であり、図１９のXX−XX部位の拡大断面図である。
【図２１】同実施形態のエアバッグの展開膨張時を示す縦断面図であり、図２２のXXI −XXI 部位の拡大断面図である。
【図２２】同実施形態のエアバッグ単体の膨張時の状態を示す正面図である。
【図２３】第５実施形態のエアバッグが収納された状態を、車内側から見た正面図である。
【図２４】同実施形態のエアバッグにおける非膨張時の展開状態を示す正面図である。
【図２５】同実施形態のエアバッグを折り畳んで、ベルト部のループ部により棒状膨張部をくるんだ状態を示す縦断面図である。
【図２６】同実施形態のエアバッグの展開膨張時を示す縦断面図であり、図２７のXXVI−XXVI部位の拡大断面図である。
【図２７】同実施形態のエアバッグ単体の膨張時の状態を示す正面図である。
【符号の説明】
２０・５０・７０・９０・１１０…エアバッグ、
２１・７１・９１・１１１…エアバッグ本体、
２１ａ・７１ａ・９１ａ・１１１ａ…（エアバッグ本体の）下縁、
２２・５２・７２・９２・１１２…膨張部、
２７…張力発揮用膨張部、
２９・５９・７９・９９・１１９…非膨張部、
３５・８５・１０５・１２５…ベルト部、
３６・８６・１０６・１２６…（ベルト部の）元部、
３８・８８・１２８…（ベルト部の）先端部、
５４…後膨張部、
５６…前膨張部、
５７…連通膨張部、
７７…突出膨張部、
９７…テーパ膨張部、
１０８…（ベルト部の）リング部、
１１７…棒状膨張部、
１２７…ループ部、
１２８ａ…スリット、
Ｗ…開口、
Ｍ１・Ｍ２・Ｍ３・Ｍ４・Ｍ５…頭部保護エアバッグ装置。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag for a head protection airbag device to be mounted on an automobile, and more specifically, is folded and stored on the upper edge side of the opening periphery of the inside of the vehicle so as to cover the opening when inflating gas flows in. The present invention relates to an airbag of an inflating head protecting airbag device.
[0002]
[Prior art and its problems]
Conventionally, in an airbag of this type of head protection airbag device, as described in International Patent Publication No. W096 / 26087, British Patent Application Publication No. 2314300, and the like, a bag that inflates so as to cover an opening inside the vehicle It was comprised with a shape-like expansion part. This inflating part has a configuration in which a plurality of non-inflating parts in the vertical direction are arranged in parallel in the horizontal direction and the expansion chambers extending in the vertical direction are arranged in parallel in the horizontal direction so that the tension in the front-rear direction is exhibited during expansion. .
[0003]
In such a configuration, when each expansion chamber expands during expansion, the distance between the non-expanded portions is reduced, and tension in the front-rear direction is applied to the expandable portions, and when the occupant is restrained, the expansion portions are moved to the outside of the vehicle. Was able to be suppressed.
[0004]
However, the conventional airbag has room for improvement in that the tension generated on the lower edge side is increased.
[0005]
An object of the present invention is to provide an airbag for a head protecting airbag device that can exert a particular tension on the lower edge side of the airbag when the airbag is inflated.
[0006]
[Means for Solving the Problems]
The first airbag according to the present invention is folded and housed on the upper edge side of the opening edge on the inner side of the vehicle, and is inflated so as to close the opening on the inner side of the vehicle when deployed and inflated, and tension is applied to the lower edge side. An air bag of a head protecting air bag device having a structure,
It is configured to include a flexible airbag body and a belt portion,
The airbag main body is configured to include an inflating portion for exerting tension for inflating gas into the end portion in the front-rear direction, and a non-inflating portion disposed around the inflating portion for exhibiting tension,
The belt portion has a length capable of generating tension when the airbag body is deployed and inflated, and the base portion side is fixed to the non-inflatable portion on the upper edge side of the tension exerting inflation portion, and the tip portion side is The opening peripheral edge that extends downward along the outer peripheral surface of the tension exerting inflatable part, passes through the non-inflatable part on the lower edge side of the tension exhibiting inflatable part, and is further away from the airbag body in the front-rear direction It is made to adhere to.
[0008]
According to the present invention 2nd The airbag is folded and stored on the upper edge side of the periphery of the opening on the inner side of the vehicle, and is inflated so as to close the opening on the inner side of the vehicle when deployed and inflated, and tension is applied to the lower edge side. An airbag of a bag device,
It is configured to include a flexible airbag body and a belt portion,
The airbag body includes a projecting and inflating portion that is folded so that the airbag body can be inflated so as to project in the front-rear direction away from the airbag body when deployed and inflated on the upper side of the front-and-rear end of the airbag body.
The belt portion is fixed to the protruding end side of the protruding inflating portion and the lower edge side of the airbag main body on the base side of the protruding inflating portion as a length capable of generating tension when the airbag main body is deployed and inflated. It is characterized by being.
[0009]
According to the present invention 3rd The airbag is folded and stored on the upper edge side of the periphery of the opening on the inner side of the vehicle, and is inflated so as to close the opening on the inner side of the vehicle when deployed and inflated, and tension is applied to the lower edge side. An airbag of a bag device,
It is configured to include a flexible airbag body and a belt portion,
The airbag main body includes a taper inflating portion that is arranged in the front-rear direction on the upper side in the front-rear direction end portion of the airbag main body and inflates in a tapered manner when deployed.
The belt portion has a ring portion having an inner diameter corresponding to the outer diameter on the distal end side of the tapered inflating portion as a length capable of generating tension when the airbag body is deployed and inflated. Is attached to the lower edge side of the airbag main body on the base part side of the taper inflating part.
[0010]
According to the present invention 4th The airbag is folded and stored on the upper edge side of the periphery of the opening on the inner side of the vehicle, and is inflated so as to close the opening on the inner side of the vehicle when deployed and inflated, and tension is applied to the lower edge side. An airbag of a bag device,
It is configured to include a flexible airbag body and a belt portion,
The airbag main body includes a rod-like inflating portion that is arranged in the front-rear direction on the upper side in the front-rear direction end portion of the airbag main body and inflates so as to be inflated downward when the airbag is deployed and inflated.
The belt portion has a length capable of generating tension when the airbag main body is deployed and inflated, and the base portion side is fixed to the lower edge side of the airbag main body on the base portion side of the rod-shaped inflating portion, and is attached to the tip portion. The folded rod-shaped inflatable portion is wrapped around a loop portion formed by inserting an intermediate portion of the belt portion through a provided slit.
[0011]
【The invention's effect】
In the airbag of the first head protection airbag device according to the present invention, when the inflation exerting portion of the airbag body is inflated during deployment, the airbag is disposed along the outer peripheral surface of the tension exhibiting inflation portion. The leading side of the belt portion pulls in the front end portion side of the belt portion inserted through the lower edge side of the tension exerting expansion portion as the tension exerting expansion portion expands. Therefore, tension is exerted on the belt portion, and the belt portion pulls the lower edge side of the inserted tension exerting expansion portion to the tip end side fixed to the opening periphery, so that the lower portion of the airbag main body is pulled. Tension is exerted on the edge side.
[0012]
Therefore, in the airbag of the first head protection airbag device according to the present invention, the tension can be particularly exerted on the lower edge side of the airbag body, and when the passenger is restrained, the airbag moves to the outside of the vehicle. Can be suppressed.
[0015]
According to the present invention 2nd In the airbag of the head protection airbag device of the present embodiment, when the airbag is deployed and inflated, the projecting and inflating portion of the airbag body is inflated so as to project in the front-rear direction away from the airbag body. Therefore, the belt portion fixed to the protruding end side of the protruding inflatable portion pulls the lower edge of the airbag body on the base portion side of the protruding inflating portion fixing the base portion side. As a result, the airbag Tension is exerted on the lower edge of the body.
[0016]
Therefore, according to the present invention 2nd Even in the airbag of the head protecting airbag apparatus, tension can be exerted particularly on the lower edge side of the airbag body, and movement of the airbag to the outside of the vehicle can be suppressed when the occupant is restrained.
[0017]
According to the present invention 3rd In the airbag of the head protection airbag device of the present invention, if the taper inflating part is inflated during deployment, the ring part of the belt part that is externally attached to the taper inflating part has a taper inflating with an outer diameter corresponding to the inner diameter. Move to the tip side of the part. Therefore, the limb part pulls the lower edge of the airbag body on the base part side of the taper inflating part connecting the base part side of the belt part. As a result, tension is exerted on the lower edge side of the airbag body. The
[0018]
Therefore, according to the present invention 3rd Even in the airbag of the head protecting airbag apparatus, tension can be exerted particularly on the lower edge side of the airbag body, and movement of the airbag to the outside of the vehicle can be suppressed when the occupant is restrained.
[0019]
According to the present invention 4th In the airbag of the head protection airbag device of the present invention, if the folded rod-shaped inflatable portion is inflated downward during deployment, the loop portion of the belt portion wraps the folded rod-shaped inflatable portion. The base part side of the belt part is drawn into the rod-shaped inflating part side so that the diameter of the part increases. Therefore, the loop part pulls the lower edge of the airbag body on the base part side of the rod-like inflating part connecting the base part side of the belt part, and as a result, tension is exerted on the lower edge side of the airbag body. The
[0020]
Therefore, according to the present invention 4th Even in the airbag of the head protecting airbag apparatus, tension can be exerted particularly on the lower edge side of the airbag body, and movement of the airbag to the outside of the vehicle can be suppressed when the occupant is restrained.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment of the present invention will be described with reference to the drawings. The airbag 20 of the first embodiment shown in FIGS. 1 to 4 is from the front pillar portion PF at the upper edge of the door W or the opening W of the window portion. The head protection airbag device M1 is provided so as to extend to the rear pillar portion PR through the roof side rail portion R at the upper portion of the center pillar portion PC.
[0022]
The head protecting airbag device M <b> 1 includes an airbag 20, an inflator 16, a mounting bracket 17, and an airbag cover 11.
[0023]
The inflator 16 is a cylinder type that supplies inflation gas to the folded airbag 20, and a gas inflow portion 23, which will be described later, of the airbag 20 is packaged.
[0024]
The mounting bracket 17 is made of sheet metal, and sandwiches the inflator 16 with the gas inflow portion 23 of the airbag 20 from the outer peripheral side together with the gas inflow portion 23, and uses the two mounting bolts 18 to rear the pillar portion PR. It will be attached to the body 9 on the body 1 side.
[0025]
The airbag cover 11 includes a front pillar garnish 12 disposed at the front pillar portion PF, a roof interior material 13 disposed at the roof side rail portion R, and a rear panel 14b of the rear pillar garnish 14 disposed at the rear pillar portion PR. , Is composed of. The front pillar garnish 12 is made of synthetic resin, and is fixedly attached to the inner panel 7 of the front pillar body 4 by mounting means (not shown) as shown in FIGS. 1 and 2, and when the airbag 20 is inflated, the airbag 20 is The door portion 12a is pushed and opened so as to protrude. As shown in FIGS. 1 and 3, the roof interior material 13 is also made of synthetic resin, and is fixedly attached to the roof side rail body 8 made of sheet metal by attachment means (not shown). And this roof interior material 13 is also comprised so that the door part 13a may be pushed and opened so that the airbag 20 may protrude when the airbag 20 expand | swells. Further, as shown in FIGS. 1 and 4, the rear pillar garnish 14 is composed of front and rear panels 14a and 14b made of synthetic resin. The front and rear panels 14a and 14b are made of sheet metal by attachment means (not shown). It is attached and fixed to the rear pillar main body 9 of the main body. The front pillar body 4 is composed of a sheet metal lean-force panel 5, an outer panel 6, and an inner panel 7, each of which includes a roof side rail body 8, a rear pillar body 9, or a side panel below the front pillar portion PF. 2 together with the body 1.
[0026]
As shown in FIGS. 5 to 8, the airbag 20 is formed into a flexible bag shape by bag weaving using polyamide yarn or the like, and on the front end side of the airbag body 21. And a flexible belt portion 35 to be fixed.
[0027]
The airbag main body 21 flows in the inflation gas from the inflator 16, is expanded from the folded state, and is inflated so as to increase its thickness, and a non-inflatable portion 29 that does not allow the inflation gas to flow. It is configured with. In addition, in the airbag main body 21, after forming a part 22 * 29 by bag-weaving, in order to improve heat resistance and a sealing performance, you may apply | coat silicon etc. to the surface side.
[0028]
The expansion part 22 includes a gas inflow part 23, a rear expansion part 24, a communication part 25, and a front expansion part 26. The rear and front inflating portions 24 and 26 are disposed so as to cover the openings W near the sides of the rear seat and the front seat of the vehicle, respectively, when the airbag 20 is deployed and inflated.
[0029]
The gas inflow part 23 is arranged on the rear end side of the inflating part 22 as a cylindrical shape with an open rear end. The gas inflow part 23 is connected to the inflator 16 by inserting the inflator 16 and tightening the inflator 16 by the mounting bracket 17. In addition, in order to ensure heat resistance, an inner tube made of the same material or the like as the airbag main body 21 itself may be fixed to the inner peripheral surface side of the gas inflow portion 23.
[0030]
The rear inflating portion 24 communicates with the gas inflow portion 23 at an upper portion thereof, and is divided from divided chambers 24a, 24b, and 24c that are divided into three chambers in the vertical direction by two rear restricting portions 31a and 31a described later of the non-inflating portion 29. ,It is configured.
[0031]
The front inflating part 26 is divided into three chambers in the vertical direction by two front restricting parts 31b and 31c, which will be described later, of the non-inflating part 29, with the communicating part 25 extending from the upper part of the rear inflating part 24 communicating with the upper part. It consists of chambers 26a, 26b, and 26c. In the case of the embodiment, the front end side of each of the divided chambers 26 a, 26 b, and 26 c constitutes the tension exerting expansion portion 27.
[0032]
The non-inflatable portion 29 is disposed so as to penetrate into the region of the peripheral portion 30 that is densely woven so as to ensure airtightness at the outer peripheral edge of the airbag body 21 and the rear and front inflatable portions 24 and 26. It is comprised from the control part 31 and the plate-shaped part 33 arrange | positioned so that the lower parts of the back and front expansion parts 24 and 26 may be connected. The restricting portion 31 is disposed so as to make the thickness of the rear and front inflating portions 24 and 26 inflated substantially constant, and extends vertically from the rear edge 30a of the peripheral portion 30 into the rear inflating portion 24. Two-stage rear restricting portions 31a, 31a, a front restricting portion 31b extending into the front inflating portion 26 obliquely forward and downward from the vicinity of the center of the upper edge 30b of the peripheral portion 30, and a front restricting portion 31b away from the peripheral portion 30 And a front restricting portion 31c extending in parallel with the front restricting portion 31b. The plate-like portion 33 is disposed in order to reduce the volume of the inflating portion 22 of the airbag body 21 and ensure the outer shape of the airbag body 21.
[0033]
Further, the inside of the vehicle and the outside of the vehicle are provided at the site of the front end of the front restricting portions 31b and 31c and the front end 30d of the lower edge 30c of the peripheral edge 30 at the site of the tension-inducing portion 27 in the non-inflatable portion 29. An insertion hole 32 through which the belt portion 35 is inserted is formed so as to communicate with each other.
[0034]
A plurality of attachment portions 34 are formed on the upper edge 30 b side of the peripheral portion 30. Each attachment portion 34 has an attachment hole 34a through which the attachment bolt 41 (see FIGS. 1 to 3) is inserted in the center by punching after bag weaving. Moreover, as shown in FIGS. 1 to 3, a mounting bracket 40 made of a sheet metal for mounting the folded airbag 20 to the inner panel 7 of the body 1 or the roof side rail body 8 is fixed to each mounting portion 34. The Rukoto.
[0035]
Each mounting bracket 40 is composed of an inner plate 40a on the vehicle inner side and an outer plate 40b on the outer side of the vehicle with the mounting portion 34 therebetween, and each mounting portion 34 is interposed between the inner and outer plates 40a and 40b. The inner and outer plates 40a and 40b are partially crimped and attached to the mounting portions 34. Mounting holes 40c corresponding to the mounting holes 34a of the mounting portions 34 are passed through the inner and outer plates 40a and 40b. Then, as shown in FIGS. 2 and 3, nuts 7 b and 8 b that are fixed to the periphery of the mounting holes 7 a and 8 a of the inner panel 7 and the roof side rail body 8 by inserting the mounting bolt 41 into the mounting holes 40 c and 34 a. As a result, the folded airbag body 21 is attached to the body 1.
[0036]
The belt portion 35 is configured as a belt formed from a woven fabric such as a polyamide yarn having flexibility. 5 and 7, the base portion 36 of the belt portion 35 is sewn and fixed to the vehicle inner side of the peripheral edge upper edge 30b on the upper edge side of the tension exerting expansion portion 27. The intermediate portion 37 facing the portion 38 extends downward along the inner surface of the split chamber 26a in the expansion portion 27 for exerting tension, passes through the insertion hole 32 of the front restricting portion 31b, and then splits the chamber 26b. Extending downward along the outer surface of the vehicle, passing through the insertion hole 32 of the front restricting portion 31c, and further extending downward along the inner surface of the divided chamber 26c, and leading end portion at the peripheral edge lower edge 30c. The insertion hole 32 of 30d is inserted. And the front-end | tip part 38 is bolted 39 to the side panel 2 below the front pillar main body 4 in the periphery of the opening W away from the airbag main body 21 (refer FIG. 1). A mounting hole 38 a through which the mounting bolt 39 is inserted is formed in the distal end portion 38.
The length of the belt portion 35 is determined by the insertion hole 32 and the front restriction portion of the front restriction portion 31b from the fixed portion of the upper base portion 36 when the airbag body 21 is attached to the vehicle alone. The length of the inner peripheral surface of the divided chamber 26a, the outer peripheral surface of the divided chamber 26b, the inner peripheral surface of the divided chamber 26c, and the lower side of the peripheral portion through the insertion hole 32 of 31c and the through hole 32 of the lower edge tip portion 30d of the peripheral portion. An airbag body in which the belt portion 35 is connected by being set smaller than a total length of the length from the insertion hole 32 of the edge tip portion 30d to the fixing portion to the periphery of the opening W of the belt portion tip portion 38. As described later, when the belt 21 is expanded and inflated, the belt portion 35 is set to be tensioned.
[0037]
Next, an operation for mounting the airbag 20 of the first embodiment on a vehicle will be described. First, the airbag 20 is folded. When the airbag 20 is folded, a number of folds C1 in the front-rear direction along the upper edge 30b of the peripheral edge 30 of the airbag body 21 are attached from the non-inflated deployed state shown in FIG. The bellows is folded from the edge 21a side to the upper edge 30b side. The folding width B1 between the folds C1 of the bellows fold is folded to be smaller than the height dimension h1 in the vertical direction of each of the divided chambers 26a, 26b, and 26c in the expansion portion 27 for exerting tension in a flatly developed state. In the embodiment, the folding width B1 is about 1/3 of the height dimension h1.
[0038]
Then, after folding, a tape material that can be broken at a predetermined interval is wound so as not to collapse.
[0039]
After folding, the mounting brackets 40 are attached to the mounting portions 34, the inflator 16 is inserted into the gas inflow portion 23, and the mounting bracket 17 is attached to the outer periphery of the gas inflow portion 23 to form an airbag assembly. In addition, it is set in a state of waiting for attachment to the vehicle. The belt part 35 is pulled out in consideration of the attachment of the tip part 38 to the vehicle. At that time, the folding width B1 between the accordion folds C1 of the airbag body 21 is set to be smaller than the height dimension h1 of each of the divided chambers 26a, 26b, and 26c of the tension exerting inflatable portion 27, and the belt portion. Even if the intermediate portion 37 of 35 is folded along the folded shape of the expansion portion 27 for exerting tension, the crease C1 is formed so as to connect the insertion holes 32, 32, 32 at the shortest distance without causing collapse. The tip portion 38 side of the belt portion 35 can be pulled out.
[0040]
After that, the mounting bracket 17 is arranged at a predetermined position of the rear pillar body 9 and fixed with bolts 18, each mounting bracket 40 is arranged at a predetermined position of the inner panel 7 and the roof side rail main body 8 and fixed with bolts 41, Then, the front end portion 38 of the belt portion 35 is fastened with a bolt 39. If the front pillar garnish 12, the roof interior material 13, and the rear pillar garnish 14 are attached to the body 1, the head protecting airbag device M1 can be mounted on the vehicle.
[0041]
Incidentally, when the front end portion 38 of the belt portion 35 is fastened to the side panel 2 with the bolt 39, the airbag body 21 is folded in a bellows so as to contract toward the upper edge 30b side of the peripheral portion 30, and the folding width B1 is also the belt portion 35. Since the tip portion 38 is small so that the tip portion 38 is extended, the tip portion 38 can be smoothly attached and fixed to the side panel 2 without generating tension.
[0042]
Then, if the inflator 16 is actuated after being mounted on the vehicle, the expansion gas G from the inflator 16 passes through the gas inflow portion 23 as shown in FIG. 6, and the rear expansion portion 24, the communication portion 25, and the front expansion. It will flow into the part 26. At that time, the airbag main body 21 breaks the wound tape material (not shown) and pushes the rear panel 14b of the front pillar garnish 12, the roof interior material 13 and the rear pillar garnish 14 so that the door portions 12a, 13a and 14c are respectively pressed. Is opened, and as shown by a two-dot chain line in FIGS. 1 to 4, the opening W is greatly expanded.
[0043]
In the airbag 20 of the first embodiment, when the inflation-purpose inflation portion 27 of the airbag body 21 is inflated when the inflation gas G flows in, the front restricting portions 31b and 31c and the peripheral edge lower edge tip portion 30d are inserted. The intermediate portion 37 on the belt portion base portion 36 side disposed along the outer peripheral surface of the tension exerting expansion portion 27 through the hole 32 is expanded along with the expansion of the tension exerting expansion portion 27. The front end portion 38 side of the belt portion 35 inserted through the insertion hole 32B on the lower edge front end portion 30d side is drawn. Therefore, tension is generated in the belt portion 35, and the belt portion 35 connects the vicinity of the insertion hole 32 </ b> B on the lower edge tip portion 30 d side of the tension exerting expansion portion 27 to the periphery of the opening W. Pulling on the 38th side, the front side pulling force F0 is exerted on the lower edge 21a side of the airbag body 21.
[0044]
Therefore, in the airbag 20 of the head protection airbag device M1 of the first embodiment, the tension can be particularly exerted on the lower edge 21a side of the airbag main body 21, and when the passenger is restrained, the outer side of the airbag 20 The movement to can be suppressed.
[0045]
In the first embodiment, as shown by a two-dot chain line in FIG. 1, the airbag main body 21 is inflated toward the vehicle interior side of the center pillar portion PC. There is no possibility of moving to the outside of the vehicle.
[0046]
Further, in the first embodiment, a vertical bar that is inflated in a columnar shape in the vertical direction is formed on the upper end of the lower edge tip portion 30d of the airbag body 21 pulled by the belt portion 35 and is configured by the front ends of the divided chambers 26a, 26b, and 26c. An inflating part 28 is arranged (see FIG. 6). Therefore, when the belt part 35 exerts tension when the airbag body 21 is deployed and inflated, the vertical bar inflating part 28 is in a rod-like state having rigidity, and the vertical bar is centered on the upper end thereof. Since a rotational torque that rotates the lower end of the inflating portion 28 forward is generated, the lower edge 21a of the airbag body 21 can be effectively obtained without reducing the vertical dimension of the airbag body 21 during deployment and inflation. Tension can be exerted on the side.
[0047]
Furthermore, in the airbag 20 according to the first embodiment, the belt portion 35 that extends along the outer peripheral surface of the tension exerting inflatable portion 27 is provided in each divided chamber on the vehicle inner surface or the vehicle outer surface of the tension exhibiting inflatable portion 27. 26a, 26b, and 26c, the base portion 36 is fixed to the upper edge 30b of the tension exerting expansion portion 27, and the intermediate portion 37 is disposed under the tension exerting expansion portion 27. The distal end portion 38 may be fixed to the side panel 2 by being directly inserted into the insertion hole 32B of the edge distal end portion 30d.
[0048]
Furthermore, in the first embodiment, a case where the gas inflow portion 23 is disposed on the rear end side of the inflatable portion 22 of the airbag main body 21 and the tension exerting inflatable portion 27 is disposed on the front end side of the inflatable portion 22 is described. Although shown, the gas inflow portion 23 may be disposed in the front pillar portion PF, the belt portion 35 may be associated, and the tension exerting inflatable portion 27 may be disposed on the rear end side of the airbag body 21.
[0049]
Next, the airbag 50 of the second embodiment will be described. The airbag 50 of 2nd Embodiment is used for the head protection airbag apparatus M2 similarly to the airbag 20 of 1st Embodiment, as shown in FIG. This head protecting airbag device M2 is different from the airbag 20 of the airbag device M1 in that the airbag 50 is the same as the airbag cover 11, the inflator 16, the mounting brackets 17 and 40, and the like. The reference numerals are attached and the description is omitted.
[0050]
And as shown in FIGS. 9-12, the airbag 50 is formed by the bag weave which uses a polyamide thread | yarn etc. as a flexible bag shape. The airbag 50 includes an inflating portion 52 that expands so as to increase its thickness by inflating the inflation gas from the inflator 16 and deploys from a folded state, and a non-inflating portion 59 that does not allow the inflation gas to flow. It is prepared for. In the airbag 50, after forming the respective parts 52 and 59 by weaving, silicon or the like may be applied to the surface side in order to improve heat resistance and sealing performance.
[0051]
The expansion part 52 includes a gas inflow part 53, a rear expansion part 54, a communication part 55, a front expansion part 56, and a communication expansion part 57. The rear and front inflating portions 54 and 56 are arranged apart from each other in the front-rear direction so as to cover the openings W near the sides of the rear seat and the front seat of the vehicle, respectively, when the airbag 50 is deployed and inflated. It is arranged.
[0052]
The gas inflow portion 53 is arranged on the rear end side of the inflating portion 52 as a cylindrical shape with an open rear end. The gas inflow portion 53 is connected to the inflator 16 by inserting the inflator 16 and tightening it to the inflator 16 side by the mounting bracket 17. In addition, in order to ensure heat resistance, an inner tube formed of the same material or the like as the airbag 50 itself may be separately attached to the inner peripheral surface side of the gas inflow portion 53.
[0053]
The rear inflating portion 54 communicates with the gas inflow portion 53 at an upper portion thereof, and is divided from three divided chambers 54a, 54b, and 54c vertically divided into three chambers by two rear regulating portions 61a and 61a described later of the non-inflating portion 59. ,It is configured.
[0054]
The front inflating part 56 is divided into three chambers in the vertical direction by two front restricting parts 61b and 61c, which will be described later, of the non-inflating part 59, with the upper part communicating with the communicating part 55 extending from the upper part of the rear inflating part 54. It is comprised from chamber 56a * 56b * 56c.
[0055]
There are a plurality of communication inflating portions 57 in the vertical direction so that the front inflating portion 56 and the rear inflating portion 54 communicate in the front-rear direction on the lower side between the front inflating portion 56 and the rear inflating portion 54 (in the embodiment). 5) are arranged side by side. The size and shape of each communication inflating portion 57 is set such that the opposing lower edges 54d and 56d of the rear and front inflating portions 54 and 56 can approach each other when the respective communication inflating portions 57 are deployed and inflated. Incidentally, the size and shape of each communication inflatable portion 57 is set so that each communication inflatable portion 57 is simply moved back and forth in a state where the airbag 50 is unflattened and flattened without slicing as shown in FIG. What is necessary is just to set so that it may arrange | position in a direction. In the case of the embodiment, the airbag 50 is formed by bag weaving, and when weaving the bag corresponding to the portion of the plate-like portion 33 in the airbag 20 of the first embodiment, as shown in FIG. What is necessary is just to weave so that it may isolate | separate into the wall part 50a inside a vehicle, and the wall part 50b outside a vehicle.
[0056]
The non-inflatable portion 59 is a restriction that is arranged so as to enter the region of the peripheral portion 60 that is densely woven so as to ensure airtightness at the outer peripheral edge of the airbag 50 and the rear and front inflatable portions 54 and 56. Part 61. The restricting portion 61 is front-expanded diagonally forward and downward from the vicinity of the center of the upper and lower rear restricting portions 61a and 61a extending from the rear edge 60a of the peripheral portion 60 into the rear inflating portion 54 and the upper edge 60b of the peripheral portion 60. A front restricting portion 61b extending into the portion 56, a front restricting portion 61c extending away from the peripheral edge portion 60 and parallel to the front restricting portion 61b below the front restricting portion 61b, and a partition restricting portion 61d that partitions each communicating expansion portion 57 And is composed of. A plurality of attachment portions 64 having attachment holes 64 a for attaching the attachment bracket 40 are formed on the upper edge 60 b side of the peripheral edge portion 60.
[0057]
Next, the operation of mounting the airbag 50 of the second embodiment on a vehicle will be described. First, similarly to the first embodiment, first, many folds in the front-rear direction along the upper edge 60b of the peripheral portion 60 are attached, The bellows is folded from the lower edge 60c of the airbag 50 toward the upper edge 60b. After folding, a tape material that can be broken at a predetermined interval is wound so as not to collapse.
[0058]
After folding, the mounting brackets 40 are attached to the mounting portions 64, the inflator 16 is inserted into the gas inflow portion 53, and the mounting bracket 17 is attached to the outer periphery of the gas inflow portion 53 to form an airbag assembly. In addition, it is set in a state of waiting for attachment to the vehicle.
[0059]
Thereafter, the mounting bracket 17 is arranged at a predetermined position of the rear pillar main body 9 and fixed with bolts 18, and the respective mounting brackets 40 are arranged at predetermined positions of the inner panel 7 and the roof side rail main body 8 and fixed with bolts 41. If the front pillar garnish 12, the roof interior material 13 and the rear pillar garnish 14 are attached to the body 1, the head protecting airbag device M2 can be attached to the vehicle.
[0060]
Then, if the inflator 16 is activated after being mounted on the vehicle, the inflation gas G from the inflator 16 passes through the gas inflow portion 53 as shown in FIG. It will flow into the part 56 and the communication expansion part 57. At that time, the air bag 50 breaks the wound tape material (not shown) and pushes the front pillar garnish 12, the roof interior material 13, and the rear panel 14 b of the rear pillar garnish 14 so that the door portions 12 a, 13 a, and 14 c are pushed. As shown by the two-dot chain line in FIG. 9, the opening W is greatly expanded so as to cover the opening W.
[0061]
In the airbag 50 of the second embodiment, when the inflating gas G flows, the rear inflating portion 54 and the front inflating portion 56 are expanded and inflated, and the plurality of communicating inflating portions 57 are inflated. In the arrangement site, tensions FV and FH are generated so as to shorten the respective lengths in the vertical direction and the front-rear direction. Since the plurality of communication inflating portions 57 are disposed on the lower side of the airbag 50, the lower edges 54d and 56d of the rear inflating portion 54 and the front inflating portion 56 that are opposed to each other by the resultant force FD of the tension FV and FH. As a result, the pulling force F0 that pulls the front and rear ends near the center is exerted on the lower edge 60c side of the airbag 50.
[0062]
Accordingly, even the airbag 50 of the head protection airbag device M2 of the second embodiment can exert a particular tension on the lower edge 60c side of the airbag 50, and when the occupant is restrained, the airbag 50 moves to the outside of the vehicle. Movement can be suppressed.
[0063]
Next, the airbag 70 of the third embodiment will be described. The airbag 70 of 3rd Embodiment is used for the head protection airbag apparatus M3 similarly to the airbag 20 of 1st Embodiment, as shown in FIG. In the head protecting airbag device M3, the airbag 70 is different from the airbag 20 of the airbag device M1, and the other airbag cover 11, the inflator 16, the mounting brackets 17 and 40, and the like are the same. The reference numerals are attached and the description is omitted.
[0064]
As shown in FIGS. 14, 15, and 17, the airbag 70 is formed by bag weaving using a polyamide yarn or the like as a flexible bag like the airbag 20 of the first embodiment. The airbag body 71 includes a flexible belt portion 85 that is fixed to the front end side of the airbag body 71.
[0065]
The airbag main body 71 flows in the inflation gas from the inflator 16, expands from the folded state, and expands so as to increase the thickness, and a non-expandable portion 79 that does not allow the inflation gas to flow. It is configured with. In the airbag main body 71 as well as the airbag main body 21 of the first embodiment, after forming the portions 72 and 79 by weaving the bag, silicon or the like is provided on the surface side in order to improve heat resistance and sealing performance. May be applied.
[0066]
The expansion part 72 includes a gas inflow part 73, a rear expansion part 74, a communication part 75, and a front expansion part 76. The rear and front inflatable portions 74 and 76 are disposed so as to cover the openings W near the sides of the rear seat and the front seat of the vehicle, respectively, when the airbag 70 is deployed and inflated.
[0067]
The gas inflow portion 73 is arranged on the rear end side of the inflating portion 72 as a cylindrical shape with an open rear end. The gas inflow portion 73 is connected to the inflator 16 by inserting the inflator 16 and tightening it to the inflator 16 side by the mounting bracket 17. In addition, in order to ensure heat resistance, an inner tube formed of the same material or the like as the airbag main body 71 itself may be fixed to the inner peripheral surface side of the gas inflow portion 73.
[0068]
The rear inflating part 74 communicates with the gas inflow part 73 at the upper part, and is divided into three chambers 74a, 74b, and 74c that are vertically divided by two rear restricting parts 81a and 81a, which will be described later, of the non-inflating part 79. ,It is configured.
[0069]
The front inflating portion 76 is divided into three chambers in the vertical direction by two front restricting portions 81b and 81c, which will be described later, of the non-inflating portion 79, with the communicating portion 75 extending from the upper portion of the rear inflating portion 74 communicating with the upper portion. It is comprised from chamber 76a * 76b * 76c. In the case of the embodiment, the division chamber 76 a on the upper side of the front expansion portion 76 protrudes forward from the division chambers 76 b and 76 c, and the front half on the front end side is a protruding expansion portion 77.
[0070]
The non-inflatable portion 79 is disposed so as to enter the region of the peripheral portion 80 that is densely woven so as to ensure airtightness at the outer peripheral edge of the airbag body 71 and the rear and front inflatable portions 74 and 76. It is comprised from the control part 81 and the plate-shaped part 83 arrange | positioned so that the lower parts of the rear and front expansion parts 74 and 76 may be connected. The restricting portion 81 is inflated forward in a diagonally forward and downward direction from near the center of the upper and lower rear restricting portions 81a and 81a extending from the rear edge 80a of the peripheral portion 80 into the rear inflating portion 74 and the upper edge 80b of the peripheral portion 80. A front restricting portion 81b extending into the portion 76 and a front restricting portion 81c extending away from the peripheral edge portion 80 and parallel to the front restricting portion 81b below the front restricting portion 81b. A plurality of attachment portions 84 having attachment holes 84 a for attaching the attachment bracket 40 are formed on the upper edge 80 b side of the peripheral edge portion 80.
[0071]
The belt portion 85 is configured as a belt formed of a woven fabric such as a polyamide yarn having flexibility, like the belt portion 35 of the first embodiment. 14 and 15, the base portion 86 of the belt portion 85 is fixed to the lower edge side of the airbag body 71 on the base portion side of the projecting and inflating portion 77, that is, the distal end portion 80 d of the peripheral edge lower edge 80 c. The front end portion 88 of the belt portion 85 is fixed to the protruding end side of the protruding inflating portion 77, that is, the front edge front end portion 80 e of the peripheral edge portion 80.
[0072]
The length of the belt portion 85 is such that the front edge of the lower edge front end portion 80d of the peripheral edge portion 80 in a state in which the protruding and inflating portion 77 protrudes when the airbag body 71 is attached to the vehicle alone. It is set so that a tension is generated in the belt portion 85, as will be described later, when the airbag main body 71, which is set to be smaller than the length to the distal end portion 80e and is fixed to the belt portion 85, is fixed. Yes.
[0073]
Next, the operation of mounting the airbag 70 of the third embodiment on a vehicle will be described. First, as shown in FIG. 15, the projecting and expanding portion 77 is folded by cactus folding so as to be folded inside the divided chamber 76a. At this time, the front edge tip 80e is arranged on the front end side of the folded divided chamber 76a. Next, as in the first embodiment, a number of folds in the front-rear direction along the upper edge 80b of the peripheral edge 80 are attached, and the bellows is folded from the lower edge 80c of the airbag 70 toward the upper edge 80b. After folding, a tape material that can be broken at a predetermined interval is wound so as not to collapse.
[0074]
After folding, the mounting bracket 40 is attached to each mounting portion 84, the inflator 16 is inserted into the gas inflow portion 73, and the mounting bracket 17 is attached to the outer periphery of the gas inflow portion 73 to form an airbag assembly. In addition, it is set in a state of waiting for attachment to the vehicle.
[0075]
Thereafter, the mounting bracket 17 is arranged at a predetermined position of the rear pillar main body 9 and fixed with bolts 18, and the respective mounting brackets 40 are arranged at predetermined positions of the inner panel 7 and the roof side rail main body 8 and fixed with bolts 41. If the front pillar garnish 12, the roof interior material 13, and the rear pillar garnish 14 are attached to the body 1, the head protecting airbag device M3 can be mounted on the vehicle.
[0076]
Then, if the inflator 16 is actuated after being mounted on the vehicle, the expansion gas G from the inflator 16 passes through the gas inflow portion 73 as shown in FIG. 17, and the rear expansion portion 74, the communication portion 75, and the projecting expansion. It will flow into the front expansion part 76 including the part 77. At that time, the airbag 70 breaks the tape material (not shown) that has been wound, and pushes the rear panel 14b of the front pillar garnish 12, the roof interior material 13, and the rear pillar garnish 14 so that the door portions 12a, 13a, and 14c are pushed. As shown by a two-dot chain line in FIG. 13, the opening W is greatly expanded so as to cover the opening W.
[0077]
In the airbag 70 of the third embodiment, when the inflation gas G flows in, the protruding and inflating portion 77 of the airbag main body 71 expands so as to protrude forward from the folded state away from the airbag main body 71. . Therefore, the belt portion 85 fixed to the front edge tip portion 80e of the peripheral edge 80, which is the protruding end side of the protruding inflatable portion 77, has a peripheral edge on the lower edge 71a side of the airbag body 71 in which the base portion 86 side is fixed. The front end 80d of the lower part edge 80c is pulled forward, and as a result, the front side tensile force F0 is exerted on the lower edge 71a side of the airbag body 71.
[0078]
Therefore, even in the airbag 70 of the head protection airbag device M3 of the third embodiment, the tension can be particularly exerted on the lower edge 71a side of the airbag body 71, and when the passenger is restrained, the outside of the airbag 70 is The movement to can be suppressed.
[0079]
Also in the third embodiment, a vertical bar that is inflated in a columnar shape in the vertical direction is formed on the upper end of the lower edge tip portion 80d of the airbag main body 71 pulled by the belt portion 85 and is configured by the front ends of the divided chambers 76a, 76b, and 76c. An inflating part 78 is arranged (see FIG. 17). Therefore, when the belt portion 85 at the time of deployment and inflation of the airbag main body 71 exerts tension, the vertical rod inflating portion 78 is in a rod-like state having rigidity, and the vertical rod is centered on the upper end thereof. Since a rotational torque is generated so as to rotate the lower end of the inflatable portion 78 forward, the lower edge of the airbag body 71 is effectively reduced without substantially reducing the vertical dimension of the airbag body 71 during deployment and inflation. The tension can be exerted on the 71a side.
[0080]
In the embodiment, when the projecting and inflating portion 77 is folded, the case where the cactus is folded is shown. May be folded back to the bellows side, or as shown in FIG.
[0081]
In the third embodiment, the gas inflow portion 73 is disposed on the rear end side of the inflatable portion 72 of the airbag main body 71 and the projecting inflatable portion 77 is disposed on the upper front end of the inflatable portion 72. Alternatively, the gas inflow portion 73 may be disposed in the front pillar portion PF, the belt portion 85 may be associated, and the protruding inflatable portion 77 may be disposed in the upper rear end of the airbag body 71.
[0082]
Next, an airbag 90 according to the fourth embodiment will be described. The airbag 90 of 4th Embodiment is used for the head protection airbag apparatus M4 similarly to the airbag 20 of 1st Embodiment, as shown in FIG. This head protection airbag device M4 also has the same airbag 90, inflator 16, mounting brackets 17 and 40, etc., except that the airbag 90 is different from the airbag 20 of the airbag device M1. The reference numerals are attached and the description is omitted.
[0083]
As shown in FIGS. 19 to 22, the airbag 90 is an airbag formed by bag weaving using polyamide yarn or the like as a flexible bag like the airbag 20 of the first embodiment. A main body 91 and a flexible belt portion 105 connected to the front end side of the airbag main body 91 are provided.
The airbag main body 91 flows in the inflation gas from the inflator 16, expands from the folded state, and expands so as to increase its thickness, and a non-expandable portion 99 that does not allow the inflation gas to flow. It is configured with. In the airbag main body 91 as well as the airbag main body 21 of the first embodiment, after forming the portions 92 and 99 by weaving the bag, silicon or the like is provided on the surface side in order to improve heat resistance and sealing performance. May be applied.
[0084]
The expansion part 92 includes a gas inflow part 93, a rear expansion part 94, a communication part 95, and a front expansion part 96. The rear and front inflating portions 94 and 96 are disposed so as to cover the openings W near the sides of the rear seat and the front seat of the vehicle, respectively, when the airbag 90 is deployed and inflated.
[0085]
The gas inflow portion 93 is arranged on the rear end side of the inflating portion 92 as a cylindrical shape with an open rear end. The gas inflow portion 93 is connected to the inflator 16 by inserting the inflator 16 and tightening the inflator 16 by the mounting bracket 17. In addition, in order to ensure heat resistance, an inner tube formed of the same material or the like as the airbag body 91 itself may be fixed to the inner peripheral surface side of the gas inflow portion 93.
[0086]
The rear inflating portion 94 communicates with the gas inflow portion 93 at the upper part, and is divided from three divided chambers 94a, 94b, and 94c that are divided into three chambers in the vertical direction by two rear restricting portions 101a and 101a described later of the non-inflating portion 99. ,It is configured.
[0087]
The front inflating part 96 is divided into three chambers in the vertical direction by two front restricting parts 101b and 101c, which will be described later, of the non-inflating part 99, with the upper part communicating with the communicating part 95 extending from the upper part of the rear inflating part 94. The chambers 96a, 96b, and 96c are configured. In the case of the embodiment, the dividing chamber 96a above the front expansion portion 96 is provided with a taper expansion portion 97 that expands in a tapered manner at the front end side protruding forward from the division chambers 96b and 96c. I am letting.
[0088]
The non-inflatable portion 99 is disposed so as to enter the region of the peripheral portion 100 that is densely woven so as to ensure airtightness at the outer peripheral edge of the airbag body 91 and the rear and front inflatable portions 94 and 96. It is comprised from the control part 101 and the plate-shaped part 103 arrange | positioned so that the lower parts of the back and front expansion parts 94 and 96 may be connected. The restricting portion 101 is front-expanded obliquely forward and downward from the vicinity of the center of the upper and lower rear-restricting portions 101a and 101a extending from the rear edge 100a of the peripheral portion 100 into the rear inflating portion 94 and the upper edge 100b of the peripheral portion 100. The front restricting portion 101b extends into the portion 96, and the front restricting portion 101c extends away from the peripheral edge portion 100 and below the front restricting portion 101b in parallel with the front restricting portion 101b. A plurality of attachment portions 104 having attachment holes 104 a for attaching the attachment bracket 40 are formed on the upper edge 100 b of the peripheral edge portion 100. The attachment portion 104 is also disposed at the tip portion of the tapered expansion portion 97.
[0089]
The belt portion 105 is configured by disposing an annular ring portion 108 at a belt-like tip portion formed from a woven fabric such as a polyamide yarn having flexibility. 19 and 20, the base portion 106 of the belt portion 105 is fixed to the lower edge side of the airbag main body 91 on the base portion side of the taper inflating portion 97, that is, the distal end portion 100d of the peripheral edge lower edge 100c. The ring portion 108 of the belt portion 105 is externally mounted on the taper expansion portion 97.
[0090]
As shown in FIGS. 21 and 22, the inner diameter dimension d0 of the ring section 108 of the belt section 105 is slightly larger than the outer diameter dimension D0 of the front end side portion 97a from the intermediate portion of the tapered expansion portion 97 at the time of expansion. Is set.
[0091]
Further, the length from the base portion 106 to the ring portion 108 of the belt portion 105 is such that a taper expansion from the lower edge tip portion 100d in the peripheral edge portion 100 in a deployed and expanded state when the airbag main body 91 is attached to the vehicle alone. As will be described later, tension is generated in the belt portion 105 when the airbag main body 91, which is set to be a predetermined dimension smaller than the length of the portion 97 to the distal end portion 97a and the belt portion 105 is fixed, is expanded and inflated. Is set to
[0092]
Next, the operation of mounting the airbag 90 of the fourth embodiment on a vehicle will be described. First, as shown in FIGS. 19 and 20, the base portion 106 is fixed to the lower edge tip portion 100d of the airbag body 91. In the state where the ring part 108 of the belt part 105 is externally attached to the base part 97b of the taper expanding part 97, a number of folds in the front-rear direction along the upper edge 100b of the peripheral part 100 are attached in the same manner as in the first embodiment. Then, the bellows is folded from the lower edge 100c of the airbag 90 toward the upper edge 100b. After folding, a tape material that can be broken at a predetermined interval is wound so as not to collapse.
[0093]
After folding, the mounting bracket 40 is attached to each mounting portion 104, the inflator 16 is inserted into the gas inflow portion 93, and the mounting bracket 17 is attached to the outer periphery of the gas inflow portion 93 to form an airbag assembly. In addition, it is set in a state of waiting for attachment to the vehicle.
[0094]
Thereafter, the mounting bracket 17 is arranged at a predetermined position of the rear pillar main body 9 and fixed with bolts 18, and the respective mounting brackets 40 are arranged at predetermined positions of the inner panel 7 and the roof side rail main body 8 and fixed with bolts 41. If the front pillar garnish 12, the roof interior material 13 and the rear pillar garnish 14 are attached to the body 1, the head protecting airbag device M4 can be mounted on the vehicle.
[0095]
Then, if the inflator 16 is actuated after being mounted on the vehicle, the expansion gas G from the inflator 16 passes through the gas inflow portion 93 as shown in FIG. 22, and the rear expansion portion 94, the communication portion 95, and the taper expansion. It will flow into the front expansion part 96 including the part 97. At that time, the airbag 90 breaks the wound tape material (not shown) and pushes the rear panel 14b of the front pillar garnish 12, the roof interior material 13, and the rear pillar garnish 14 so that the door portions 12a, 13a, and 14c are pushed. As shown by a two-dot chain line in FIG. 18, the opening W is expanded so as to cover the opening W.
[0096]
In the airbag 90 of the fourth embodiment, if the taper inflating portion 97 is inflated when the inflating gas G flows, the ring portion 108 of the belt portion 95 that is externally mounted on the taper inflating portion 97 becomes the taper inflating portion. 97 moves from the large-diameter base portion 97b of the large-diameter dimension to the front-end portion 97a of the outer diameter D0 corresponding to the inner diameter d0 of the ring portion 108 so as to slide forward on the outer peripheral surface of the tapered expansion portion 97. . Therefore, the ring portion 108 pulls forward the peripheral edge lower edge tip portion 100d of the airbag body 91 on the base portion side of the taper inflating portion 97 that fixes the base portion 106 side of the belt portion 105, and as a result, A tensile force F0 toward the front side is exerted on the lower edge 91a side of the airbag body 91.
[0097]
Accordingly, even the airbag 90 of the head protection airbag device M4 of the fourth embodiment can exert tension particularly on the lower edge 91a side of the airbag body 91, and when the passenger is restrained, the outside of the airbag 90 is The movement to can be suppressed.
[0098]
Also in the fourth embodiment, a vertical bar that is inflated in a column shape in the vertical direction is formed on the upper end of the lower edge tip portion 100d of the airbag main body 91 pulled by the belt portion 105, which is configured by the front ends of the divided chambers 96a, 96b, and 96c. An inflating part 98 is arranged (see FIG. 22). Therefore, when the belt portion 105 exerts tension when the airbag main body 91 is deployed and inflated, the vertical rod inflating portion 98 is in a rod-like state having rigidity, and the vertical bar is centered on the upper end thereof. Since a rotational torque that rotates the lower end of the inflating portion 98 forward is generated, the lower edge 91a of the airbag body 91 can be effectively obtained without reducing the vertical dimension of the airbag body 91 during deployment and inflation. Tension can be exerted on the side.
[0099]
In the embodiment, the gas inflow portion 93 is disposed on the rear end side of the inflatable portion 92 of the airbag main body 91 and the tapered inflatable portion 97 is disposed on the upper front end of the inflatable portion 92. The inflow portion 93 may be disposed on the front pillar portion PF, the belt portion 105 may be associated, and the tapered inflating portion 97 may be disposed on the upper rear end of the airbag body 91.
[0100]
Next, the airbag 110 of the fifth embodiment will be described. The airbag 110 of 5th Embodiment is used for the head protection airbag apparatus M5 similarly to the airbag 20 of 1st Embodiment, as shown in FIG. This head protection airbag device M5 also has the same airbag 110, inflator 16, mounting brackets 17 and 40, etc., except that the airbag 110 is different from the airbag 20 of the airbag device M1. The reference numerals are attached and the description is omitted.
[0101]
As shown in FIGS. 24 to 27, the airbag 110 is an airbag formed by bag weaving using polyamide yarn or the like as a flexible bag like the airbag 20 of the first embodiment. The main body 111 and a flexible belt portion 125 connected to the front end side of the airbag main body 111 are provided.
[0102]
The airbag main body 111 flows in the inflation gas from the inflator 16, expands from the folded state, and expands to increase the thickness, and the non-expandable portion 119 does not allow the inflation gas to flow. It is configured with. In the airbag main body 111 as well as the airbag main body 21 of the first embodiment, after forming the respective portions 112 and 119 by weaving the bag, silicon or the like is provided on the surface side in order to improve heat resistance and sealing performance. May be applied.
[0103]
The expansion part 112 includes a gas inflow part 113, a rear expansion part 114, a communication part 115, and a front expansion part 116. The rear and front inflatable portions 114 and 116 are disposed so as to cover the openings W near the sides of the rear seat and the front seat of the vehicle, respectively, when the airbag 110 is deployed and inflated.
[0104]
The gas inflow part 113 is arranged on the rear end side of the inflating part 112 as a cylindrical shape with an open rear end. The gas inflow portion 113 is connected to the inflator 16 by inserting the inflator 16 and tightening it to the inflator 16 side by the mounting bracket 17. In addition, in order to ensure heat resistance, an inner tube formed of the same material or the like as the airbag body 111 itself may be separately attached to the inner peripheral surface side of the gas inflow portion 113.
[0105]
The rear inflating part 114 communicates with the gas inflow part 113 at the upper part, and is divided into three chambers 114a, 114b, and 114c that are divided into three chambers in the vertical direction by two rear restricting parts 121a and 121a described later of the non-inflating part 119. ,It is configured.
[0106]
The front inflating portion 116 is divided into three chambers in the vertical direction by two front restricting portions 121b and 121c, which will be described later, of the non-inflating portion 119, with the communicating portion 115 extending from the upper portion of the rear inflating portion 114 communicating with the upper portion. The chambers 116a, 116b, and 116c are configured. In the case of the embodiment, the division chamber 116a at the upper portion of the front expansion portion 116 expands to the front end side protruding forward from the division chambers 116b and 116c so as to be disengaged during expansion and expansion and to expand downward. A rod-shaped expansion part 117 is disposed.
[0107]
The non-inflatable portion 119 is disposed so as to enter the region of the peripheral portion 120 that is densely woven so as to ensure airtightness at the outer peripheral edge of the airbag body 111 and the regions of the rear and front inflatable portions 114 and 116. It is comprised from the control part 121 and the plate-shaped part 123 arrange | positioned so that the lower parts of the back and front expansion parts 114 and 116 may be connected. The restricting portion 121 is front-expanded diagonally forward and downward from the vicinity of the center of the upper and lower rear-restricting portions 121a and 121a extending from the rear edge 120a of the peripheral portion 120 into the rear inflating portion 114 and the upper edge 120b of the peripheral portion 120. The front restricting portion 121b extends into the portion 116, and the front restricting portion 121c extends from the peripheral portion 120 and below the front restricting portion 121b in parallel with the front restricting portion 121b. In addition, a plurality of attachment portions 124 including attachment holes 124 a for attaching the attachment bracket 40 are formed on the upper edge 120 b of the peripheral edge portion 120. Note that the attachment portion 124 is also disposed at the distal end portion of the rod-shaped expansion portion 117.
[0108]
The belt part 125 has a slit 128a in which a front end part 128 is wider than other parts as a belt-like shape formed of a woven fabric such as a polyamide yarn having flexibility. An intermediate portion extending from the distal end portion 128 toward the base portion 126 side is inserted into the slit 128a, and a loop portion 127 is formed. 24 and 25, the base portion 126 of the belt portion 125 is fixed to the lower edge side of the airbag main body 111 on the base portion side of the rod-shaped inflating portion 117, that is, the front end portion 120d of the peripheral edge lower edge 120c. The loop portion 127 is externally mounted on the central portion 117a of the rod-shaped expansion portion 117 so as to enclose the folded rod-shaped expansion portion 117.
[0109]
The length from the base part 126 of the belt part 125 to the slit 128a of the front end part 128 is from the lower edge front end part 120d in the peripheral part 120 when the airbag main body 111 is attached to the vehicle as a single unit. An airbag main body that is set to be smaller by a predetermined dimension than the total length of the length of the rod-shaped inflatable portion 117 near the central portion 117a and the length of the outer peripheral surface of the rod-shaped inflatable portion 117 of the central portion 117a and to which the belt portion 125 is fixed. As described later, when the belt 111 is deployed and inflated, the belt portion 125 is set to be tensioned.
[0110]
Next, an operation of mounting the airbag 110 of the fifth embodiment on a vehicle will be described. First, as in the first embodiment, a fold C2 in the front-rear direction along the upper edge 120b of the peripheral portion 120 (see FIG. 24). ) And a bellows fold from the lower edge 120c of the airbag 110 toward the upper edge 120b. The folding width B2 between the folds C2 is folded to be smaller than the height dimension h2 in the vertical direction of the rod-shaped inflating portion 117 in a flat developed state. In the case of the embodiment, the folding width B2 is about 1/3 of the height dimension h2. Next, as shown in FIG. 25, the loop portion 127 of the belt portion 125 in which the base portion 126 is fixed to the lower edge tip portion 120 d of the airbag main body 111 is externally mounted in the vicinity of the central portion 117 a of the rod-shaped inflating portion 117. Thereafter, a tape material that can be broken at a predetermined interval is wound around the folded airbag body 111 so as not to collapse.
[0111]
And while attaching the attachment bracket 40 to each attachment part 124, the inflator 16 is inserted in the gas inflow part 113, the attachment bracket 17 is attached to the outer periphery of the gas inflow part 113, the airbag assembly is formed, and a vehicle It is set in the state of waiting for attachment to.
[0112]
Thereafter, the mounting bracket 17 is arranged at a predetermined position of the rear pillar main body 9 and fixed with bolts 18, and the respective mounting brackets 40 are arranged at predetermined positions of the inner panel 7 and the roof side rail main body 8 and fixed with bolts 41. If the front pillar garnish 12, the roof interior material 13, and the rear pillar garnish 14 are attached to the body 1, the head protecting airbag device M5 can be mounted on the vehicle.
[0113]
Then, if the inflator 16 is operated after being mounted on the vehicle, the expansion gas G from the inflator 16 passes through the gas inflow portion 113 as shown in FIG. 27, and the rear expansion portion 114, the communication portion 115, and the rod-like expansion. It will flow into the front expansion part 116 including the part 117. At that time, the airbag 110 breaks the tape material (not shown) that has been wound, and pushes the rear panel 14b of the front pillar garnish 12, the roof interior material 13, and the rear pillar garnish 14 so that the door portions 12a, 13a, and 14c are pushed. As shown by the two-dot chain line in FIG. 23, the opening W is expanded so as to cover the opening W.
[0114]
In the airbag 110 of the fifth embodiment, when the inflating gas G flows in, if the rod-shaped inflating portion 117 is inflated so as to be folded and inflated downward, the loop portion 127 of the belt portion 125 becomes the rod-shaped inflating portion. Since the belt 117 is wrapped, as shown in FIGS. 26 and 27, the base portion 126 side of the belt portion 125 is drawn to the outer peripheral surface side of the rod-shaped inflating portion 117 so that the loop portion 127 has a larger diameter. Therefore, the loop portion 127 pulls the front end portion 120d of the peripheral edge lower edge of the airbag body 111 on the base portion side of the rod-shaped inflating portion 117 connecting the base portion 126 side of the belt portion 125, and as a result The tensile force F0 toward the front side is exerted on the lower edge 111a side of the airbag body 111.
[0115]
Therefore, even the airbag 110 of the head protection airbag device M5 of the fifth embodiment can exert a particular tension on the lower edge 111a side of the airbag body 111, and when the passenger is restrained, the exterior of the airbag 110 The movement to can be suppressed.
[0116]
Also in the fifth embodiment, a vertical bar that expands in a columnar shape in the vertical direction is formed at the upper end of the lower edge tip portion 120d of the airbag main body 111 pulled by the belt portion 125 and is configured by the front ends of the divided chambers 116a, 116b, and 116c. An inflating part 118 is arranged (see FIG. 27). Therefore, when the belt portion 125 exerts tension when the airbag main body 111 is deployed and inflated, the vertical rod inflating portion 118 is in a rod-like state having rigidity, and the vertical bar is centered on the upper end thereof. Since a rotational torque that rotates the lower end of the inflatable portion 118 forward is generated, the bottom edge of the airbag body 111 can be effectively reduced without substantially reducing the vertical dimension of the airbag body 111 during deployment and inflation. The tension can be exerted on the 111a side.
[0117]
In the embodiment, the gas inflow portion 113 is disposed on the rear end side of the inflatable portion 112 of the airbag main body 111, and the rod-shaped inflatable portion 117 is disposed on the upper front end of the inflatable portion 112. The inflow portion 113 may be disposed on the front pillar portion PF, the belt portion 125 may be associated, and the rod-shaped inflatable portion 117 may be disposed on the upper rear end of the airbag body 111.
[Brief description of the drawings]
FIG. 1 is a front view of a state in which an airbag according to a first embodiment of the present invention is stored, as viewed from the inside of a vehicle.
2 is a schematic enlarged cross-sectional view taken along a line II-II in FIG.
3 is a schematic enlarged cross-sectional view taken along the line III-III in FIG.
4 is a schematic enlarged cross-sectional view of the IV-IV portion of FIG. 1. FIG.
FIG. 5 is a front view showing a deployed state when the airbag of the embodiment is not inflated.
FIG. 6 is a front view showing a state when the airbag according to the embodiment is inflated;
7 is a longitudinal sectional view showing the airbag according to the embodiment when the airbag is not inflated, and is a schematic enlarged sectional view of a portion VII-VII in FIG. 5;
8 is a longitudinal sectional view showing the airbag according to the embodiment when the airbag is deployed and inflated, and is a schematic enlarged sectional view of a portion VIII-VIII in FIG. 6;
FIG. 9 is a front view of the state in which the airbag according to the second embodiment is stored, as viewed from the inside of the vehicle.
FIG. 10 is a front view showing a deployed state when the airbag of the embodiment is not inflated.
FIG. 11 is a front view showing a state when the airbag according to the embodiment is inflated;
12 is a longitudinal sectional view showing the airbag according to the embodiment when the airbag is deployed and inflated, and is an enlarged sectional view of a portion XII-XII in FIG.
FIG. 13 is a front view of a state in which the airbag according to the third embodiment is stored, as viewed from the inside of the vehicle.
FIG. 14 is a front view showing a deployed state when the airbag according to the embodiment is not inflated, and shows a state in which the projecting inflated portion is folded;
15 is a transverse sectional view showing a folded state of the protruding inflatable portion in the airbag according to the embodiment, and is an enlarged sectional view of the XV-XV portion of FIG. 14;
FIG. 16 is a cross-sectional view showing a modified example of the folded state of the protruding inflatable portion in the airbag of the embodiment.
FIG. 17 is a front view showing a state when the airbag alone according to the embodiment is inflated;
FIG. 18 is a front view of the state in which the airbag according to the fourth embodiment is stored, as viewed from the inside of the vehicle.
FIG. 19 is a front view showing a deployed state when the airbag of the embodiment is not inflated.
20 is a longitudinal sectional view showing the airbag according to the embodiment when not inflated, and is an enlarged sectional view of a portion XX-XX in FIG. 19;
21 is a longitudinal sectional view showing the airbag according to the embodiment when the airbag is deployed and inflated, and is an enlarged sectional view of a portion XXI-XXI in FIG. 22;
FIG. 22 is a front view showing a state when the airbag alone according to the embodiment is inflated;
FIG. 23 is a front view of the state in which the airbag according to the fifth embodiment is stored, as viewed from the inside of the vehicle.
FIG. 24 is a front view showing a deployed state when the airbag of the embodiment is not inflated.
FIG. 25 is a longitudinal sectional view showing a state in which the airbag according to the embodiment is folded and a rod-shaped inflating portion is wrapped by a loop portion of a belt portion.
26 is a longitudinal sectional view showing the airbag according to the embodiment when the airbag is deployed and inflated, and is an enlarged sectional view of a portion XXVI-XXVI in FIG. 27;
FIG. 27 is a front view showing a state when the airbag alone according to the embodiment is inflated;
[Explanation of symbols]
20, 50, 70, 90, 110 ... airbags,
21, 71, 91, 111 ... airbag body,
21a / 71a / 91a / 111a (lower edge of the airbag body),
22, 52, 72, 92, 112 ... inflatable part,
27 ... Inflating portion for exerting tension,
29, 59, 79, 99, 119 ... non-inflatable part,
35, 85, 105, 125 ... belt part,
36, 86, 106, 126 ... (the belt)
38, 88, 128 ... (the belt)
54 ... rear expansion part,
56 ... front expansion part,
57 ... Communication expansion part,
77. Projection expansion part,
97 ... taper expansion part,
108 ... ring part (of belt part),
117 ... Rod-shaped expansion part,
127 ... Loop part,
128a ... slit,
W ... Opening,
M1, M2, M3, M4, M5 ... Head protection airbag device.

Claims (4)

車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有するエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前後方向の端部側に、膨張用ガスを流入させる張力発揮用膨張部と、該張力発揮用膨張部の周囲に配置される非膨張部と、を備えて構成され、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、元部側を、前記張力発揮用膨張部の上縁側の前記非膨張部に固着させ、先端部側を、前記張力発揮用膨張部の外周面に沿って下方へ延ばして、前記張力発揮用膨張部の下縁側の前記非膨張部を挿通させ、さらに、前記エアバッグ本体から前後方向に離れた前記開口周縁に固着させていることを特徴とする頭部保護エアバッグ装置のエアバッグ。The airbag of the head protection airbag device configured to be folded and stored on the upper edge side of the opening periphery of the vehicle inner side and to be inflated so as to close the opening on the vehicle inner side and to apply tension to the lower edge side when deployed and inflated. Because
It is configured to include a flexible airbag body and a belt portion,
The airbag main body is configured to include an inflating portion for exerting tension for inflating gas into the end portion in the front-rear direction, and a non-inflating portion disposed around the inflating portion for exhibiting tension,
The belt portion has a length capable of generating tension when the airbag body is deployed and inflated, and the base portion side is fixed to the non-inflatable portion on the upper edge side of the tension exerting inflation portion, and the tip portion side is The opening peripheral edge that extends downward along the outer peripheral surface of the tension exerting inflatable part, passes through the non-inflatable part on the lower edge side of the tension exhibiting inflatable part, and is further away from the airbag body in the front-rear direction An airbag for a head protecting airbag device, wherein the airbag is fixed to the airbag. 車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有したエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前記エアバッグ本体の前後方向の端部における上部側に、展開膨張時に前記エアバッグ本体から遠ざかる前後方向に突出するように膨張可能として、折り畳まれた突出膨張部を備え、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、前記突出膨張部の突出端側と前記突出膨張部の元部側における前記エアバッグ本体の下縁側とに固着されていることを特徴とする頭部保護エアバッグ装置のエアバッグ。The airbag of the head protection airbag device configured to be folded and stored on the upper edge side of the opening periphery of the vehicle inner side and to be inflated so as to close the opening on the vehicle inner side and to apply tension to the lower edge side when deployed and inflated. Because
It is configured to include a flexible airbag body and a belt portion,
The airbag body includes a projecting and inflating portion that is folded so that the airbag body can be inflated so as to project in the front-rear direction away from the airbag body when deployed and inflated on the upper side of the front-and-rear end of the airbag body.
The belt portion is fixed to the protruding end side of the protruding inflating portion and the lower edge side of the airbag main body on the base side of the protruding inflating portion as a length capable of generating tension when the airbag main body is deployed and inflated. An air bag for a head protecting air bag device. 車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有したエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前記エアバッグ本体の前後方向の端部における上部側に前後方向に配置されて、展開膨張時に先細り状に膨張するテーパ膨張部を備え、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、前記テーパ膨張部における先端側の外径に対応した内径を有したリング部を先端側に備え、該リング部を前記テーパ膨張部に外装させて、元部側を、前記テーパ膨張部の元部側における前記エアバッグ本体の下縁側に、固着させていることを特徴とする頭部保護エアバッグ装置のエアバッグ。The airbag of the head protection airbag device configured to be folded and stored on the upper edge side of the opening periphery of the vehicle inner side and to be inflated so as to close the opening on the vehicle inner side and to apply tension to the lower edge side when deployed and inflated. Because
It is configured to include a flexible airbag body and a belt portion,
The airbag main body includes a taper inflating portion that is arranged in the front-rear direction on the upper side in the front-rear direction end portion of the airbag main body and inflates in a tapered manner when deployed.
The belt portion has a ring portion having an inner diameter corresponding to the outer diameter on the distal end side of the tapered inflating portion as a length capable of generating tension when the airbag body is deployed and inflated. Is attached to the lower edge side of the airbag main body on the base portion side of the taper inflating portion. bag. 車内側の開口周縁の上縁側に折り畳まれて収納され、展開膨張時に、車内側の前記開口を塞ぐように膨張して、下縁側に張力が加えられる構成の頭部保護エアバッグ装置のエアバッグであって、
可撓性を有したエアバッグ本体とベルト部とを備えて構成され、
前記エアバッグ本体が、前記エアバッグ本体の前後方向の端部における上部側に前後方向に配置されて、展開膨張時に折りを解消して下方へ膨らむように膨張する棒状膨張部を備え、
前記ベルト部が、前記エアバッグ本体の展開膨張時に張力を発生可能な長さとして、元部側を前記棒状膨張部の元部側における前記エアバッグ本体の下縁側に固着させるとともに、先端部に設けたスリットに前記ベルト部の中間部位を挿通させてなるループ部に、折り畳んだ前記棒状膨張部をくるませていることを特徴とする頭部保護エアバッグ装置のエアバッグ。The airbag of the head protection airbag device configured to be folded and stored on the upper edge side of the opening periphery of the vehicle inner side and to be inflated so as to close the opening on the vehicle inner side and to apply tension to the lower edge side when deployed and inflated. Because
It is configured to include a flexible airbag body and a belt portion,
The airbag main body includes a rod-like inflating portion that is arranged in the front-rear direction on the upper side in the front-rear direction end portion of the airbag main body and inflates so as to be inflated downward when the airbag is deployed and inflated.
The belt portion has a length capable of generating tension when the airbag main body is deployed and inflated, and the base portion side is fixed to the lower edge side of the airbag main body on the base portion side of the rod-shaped inflating portion, and is attached to the tip portion. An airbag of a head protection airbag device, wherein the folded rod-shaped inflatable portion is wrapped in a loop portion formed by inserting an intermediate portion of the belt portion through a provided slit.
JP16567899A 1999-06-11 1999-06-11 Head protection airbag device airbag Expired - Fee Related JP4134444B2 (en)

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JP4748141B2 (en) * 2002-02-27 2011-08-17 タカタ株式会社 Head protection airbag and head protection airbag device
GB2390576B (en) 2002-07-12 2005-06-15 Autoliv Dev Improvements in or relating to an air-bag
JP4481248B2 (en) 2003-10-27 2010-06-16 オートリブ ディベロップメント エービー Side curtain airbag
WO2005056348A1 (en) 2003-12-08 2005-06-23 Autoliv Development Ab Vehicle air bag device
JP5148749B2 (en) * 2010-01-22 2013-02-20 三菱自動車工業株式会社 Head airbag device
US8360469B2 (en) * 2010-08-27 2013-01-29 Tk Holdings Inc. Airbag system
DE102010056342A1 (en) * 2010-12-29 2012-07-05 Autoliv Development Ab Curtain airbag for a vehicle
US8876155B2 (en) 2011-04-20 2014-11-04 Autoliv Development Ab Curtain airbag device for vehicle
JP6274078B2 (en) * 2014-11-04 2018-02-07 トヨタ自動車株式会社 Curtain airbag device for vehicle
JP7298528B2 (en) 2020-03-27 2023-06-27 豊田合成株式会社 Head protection airbag device
CN113665529A (en) * 2021-09-28 2021-11-19 宜致汽车安全系统（常熟）有限公司 Folding method of three-row head safety airbag

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