JP3930328B2

JP3930328B2 - Head protection airbag device

Info

Publication number: JP3930328B2
Application number: JP2002013229A
Authority: JP
Inventors: 利則棚瀬; 浩幸高橋
Original assignee: Toyota Motor Corp; Toyoda Gosei Co Ltd
Current assignee: Toyota Motor Corp; Toyoda Gosei Co Ltd
Priority date: 2001-01-25
Filing date: 2002-01-22
Publication date: 2007-06-13
Anticipated expiration: 2022-01-22
Also published as: JP2002293211A

Description

【０００１】
【発明の属する技術分野】
本発明は、車両に搭載される頭部保護エアバッグ装置に関し、詳しくは、エアバッグが、シートの背もたれ部の側方における車内側の開口の上縁側に、折り畳まれて収納され、膨張用ガスの流入時に、開口を覆うように展開膨張する頭部保護エアバッグ装置に関する。
【０００２】
【従来の技術とその課題】
従来の頭部保護エアバッグ装置では、特開２０００−３３５３５６号公報に記載されているように、エアバッグが、車内側のドア等の開口の上縁側に、折り畳まれて収納され、膨張用ガスの流入時に、車内側開口を覆うように展開膨張していた。
【０００３】
しかし、エアバッグが、展開膨張完了時の形状として、上下方向の長さ寸法を大きくして、車内側の開口を広く覆えるように構成されると、展開膨張時、シートの背もたれ部、特に、その背もたれ部の側面側の上端部と干渉して、エアバッグの展開膨張を阻害する虞れが生ずる。
【０００４】
本発明は、上述の課題を解決するものであり、エアバッグが車内側の開口を広く覆えるように構成されていても、シートの背もたれ部との干渉を抑えて、円滑にエアバッグを展開膨張させることができる頭部保護エアバッグ装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明に係る頭部保護エアバッグ装置では、シートの背もたれ部の側方における車内側の開口の上縁側に、折り畳まれて収納され、膨張用ガスの流入時に、前記開口を覆うように展開膨張するエアバッグを備えた頭部保護エアバッグ装置であって、
前記エアバッグが、前記膨張用ガスを流入させるガス流入部と、該ガス流入部を囲む周縁部と、を備えて、
前記ガス流入部が、車内側壁部と車外側壁部とを結合させた区画結合部に区画されて、前後方向に沿って複数並設され、それぞれ、前記膨張用ガスの流入時に前記車内側壁部と前記車外側壁部とを離すように膨張する膨張部を、備えて構成され、
前記背もたれ部の側方に配置される膨張部が、下端を他の一般膨張部の下端より上方位置に配置させる下端変位膨張部として、前記背もたれ部の上端部との干渉を防止可能に構成され、
前記ガス流入部が、前席シートと後席シートとのそれぞれの側方の開口を覆うように配設された前席用流入部と後席用流入部とを備え、
前記前席用流入部と前記後席用流入部とに、それぞれ、前記前席・後席シートの背もたれ部に対応するように、前記下端変位膨張部が配設されて、
前記前席用流入部の前記下端変位膨張部が、前後方向の幅寸法を、前記後席用流入部の前記下端変位膨張部における前後方向の幅寸法より、大きく設定されていることを特徴とする。
【０００６】
そして、前記エアバッグは、非膨張状態で平らに展開させた際、前記下端変位膨張部の下方の周縁部の部位が、前記下端変位膨張部に隣接する一般膨張部の下方の周縁部の部位と、下縁側の高さ位置を略一致させるように、形成されることが望ましい。
【０００８】
さらに、前記エアバッグは、車両の側面衝突時とロールオーバ時とに、それぞれ、前記膨張用ガスを流入させるように構成することが望ましい。
【０００９】
なお、本明細書での前後方向と上下方向とは、エアバッグ装置が車両に搭載された状態での、車両の前後方向と上下方向とに対応するものである。
【００１０】
【発明の効果】
本発明に係る頭部保護エアバッグ装置では、折り畳まれたエアバッグが、膨張用ガスを流入させて、展開膨張を完了させた際、下端変位膨張部が、その下端を他の一般膨張部の下端より上方位置に配置させて、シートの背もたれ部における上端部と干渉しないように、膨張する。そして、他の一般膨張部は、下端をシートの背もたれ部の上端部より下方に配置させて、車内側開口を広く覆うように、展開膨張させることができることから、エアバッグ全体は、支障なく、展開膨張を完了させることができる。
【００１１】
したがって、本発明に係る頭部保護エアバッグ装置では、エアバッグが車内側の開口を広く覆えるように構成されていても、シートの背もたれ部との干渉を抑えて、円滑にエアバッグを展開膨張させることができる。
また、前席シートは、後席シートに比べて、前後方向に長く移動調整可能に、構成されており、前席シートが前後方向の長い範囲で移動調整されても、前席用流入部の下端変位膨張部が、後席用流入部の下端変位膨張部より、前後方向の幅寸法を大きくして、形成されていることから、前席用流入部の下端変位膨張部が展開膨張しても、その下端変位膨張部の下端は、移動調整された前席シートの背もたれ部の上端部と干渉し難い。そのため、請求項１に記載のエアバッグ装置は、前席・後席シートを備えた車両に搭載しても、円滑に、作動させることができる。
【００１２】
そして、請求項２に記載するように構成されておれば、エアバッグの展開膨張完了時、下端変位膨張部の下端が、他の一般膨張部の下端より上方位置に配置されていても、下端変位膨張部の下方側の周縁部の部位は、背もたれ部の上端部と干渉して、屈曲されつつ、隣接する一般膨張部の下方側の周縁部の部位と、極力、下縁側の高さ位置を略一致させるように、配置されることから、エアバッグの下縁側に、前後方向に沿うテンションを発生させることが可能となって、展開膨張完了時のエアバッグは、車内側や車外側への押圧力を受けても、揺動を抑制されて、乗員を的確に拘束することができる。
【００１５】
また、請求項３に記載するように構成する場合には、車両の側面衝突時とロールオーバ時とに、ともに、エアバッグが、展開膨張して、車内側開口を広く覆うことが可能となるため、車両の側面衝突時のみならず、車両のロールオーバ時にも、エアバッグが、乗員を的確に保護することができる。
【００１６】
【発明の実施の形態】
以下、本発明の一実施形態を図面に基づいて説明する。
【００１７】
実施形態の頭部保護エアバッグ装置Ｍは、図１に示すように、エアバッグ１２を、車両Ｖにおける車内側のドアや窓部の開口Ｗの上縁側周縁におけるフロントピラー部ＦＰの下縁側、ルーフサイドレール部ＲＲの下縁側、及び、リヤピラー部ＲＰの上方側にわたって、折り畳んで収納させている。なお、車両Ｖは、前席シート９と後席シート１０とを備えて構成され、エアバッグ１２は、展開膨張時、前席シート９の側方における上方側の開口Ｗ１と後席シート１０の側方における上方側の開口Ｗ２とを覆うように構成されている。
【００１８】
この頭部保護エアバッグ装置Ｍは、エアバッグ１２、インフレーター３５、取付ブラケット３２・３６、エアバッグカバー８、側突用センサ４１、ロールオーバセンサ４２、及び、制御装置４３、を備えて構成されている。
【００１９】
インフレーター３５は、図１に示すように、折り畳まれたエアバッグ１２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１２の後述する接続口部２２ａが外装されている。そして、このインフレーター３５は、制御装置４３からの作動信号を入力させて、作動されることとなる。
【００２０】
制御装置４３は、車両Ｖの側面に所定以上の衝撃が加わった際の側突用センサ４１からの側突検知信号を入力させた際と、車両Ｖの転倒が予測されるようなロールオーバセンサ４２からのロールオーバ検知信号を入力させた際とに、インフレーター３５へ作動信号を出力する。側突用センサ４１、ロールオーバセンサ４２、及び、制御装置４３は、車両Ｖの所定位置に配設されて、電気的に相互に接続されている。また、インフレーター３５も、制御装置４３と電気的に接続されている。
【００２１】
取付ブラケット３６は、板金製として、エアバッグ１２の接続口部２２ａを外装させたインフレーター３５を、接続口部２２ａごと外周側から挟持し、２本の取付ボルト３７を利用して、リヤピラー部ＲＰの車内側におけるボディ１側の板金製のインナパネル２に取り付けるように、構成されている。
【００２２】
取付ブラケット３２は、図１・２に示すように、板金製として、エアバッグ１２における後述する各取付部２５を挟持するもので、それぞれ、車内側Ｉと車外側Ｏとの内・外プレート（図符号省略）を備えて構成され、内・外プレートによって各取付部２５を挟持した状態で、各取付ボルト３３を、各取付部２５の取付孔２５ａと各取付ブラケット３２に設けられた取付孔（図符号省略）とに挿通させて、インナパネル２の取付孔２ａ周縁に固着されたナット２ｂに螺合させることにより、各取付部２５をインナパネル２に取り付けている。
【００２３】
エアバッグカバー８は、図１・２に示すように、フロントピラー部ＦＰに配置されるピラーガーニッシュ４とルーフサイドレール部ＲＲに配置されるルーフヘッドライニング５とのそれぞれの下縁側から構成されている。なお、フロントピラーガーニッシュ４とルーフヘッドライニング５とは、合成樹脂製として、フロントピラー部ＦＰとルーフサイドレール部ＲＲの車内側におけるボディ１のインナパネル２に取付固定されている。また、ルーフヘッドライニング５は、フロントピラー部ＦＰの上方付近から、センターピラー部ＣＰの上方を経て、リヤピラー部ＲＰの上方付近まで、配設されている。
【００２４】
エアバッグ１２は、袋織りにより製造されて、図１〜５に示すように、インフレーター３５からの膨張用ガスＧを流入させて、折り畳み状態から展開して、開口Ｗ（Ｗ１・Ｗ２）やセンターピラー部ＣＰのピラーガーニッシュ７の車内側を覆うように、開口Ｗ１・Ｗ２の周縁の上縁側に折り畳まれて収納されている。そして、エアバッグ１２は、図３に示すように、車内側壁部１３ａと車外側壁部１３ｂとを離すようにして（図４・５参照）、膨張用ガスＧを内部に流入可能なガス流入部１３と、膨張用ガスＧを流入させない非流入部２４と、から構成されている。
【００２５】
ガス流入部１３は、実施形態の場合、前席用流入部１４、後席用流入部１８、連通流入部２２、及び、連通部２３、から構成されている。前席用流入部１４は、連通流入部２２の前部側の下方に配置され、エアバッグ１２の展開膨張時、車両Ｖの前席シート９の側方（車外側Ｏ）における上方側に配置された開口Ｗ１を覆うように、膨張することとなる。後席用流入部１８は、連通流入部２２の後部側の下方に配置され、エアバッグ１２の展開膨張時、車両Ｖの後席シート１０の側方（車外側Ｏ）における上方側に配置された開口Ｗ２を覆うこととなる。連通部２３は、前席用流入部１４の後端下部と後席用流入部１８の前端下部とを連通するように、エアバッグ１２の下縁１２ｂ側における前後方向の中央付近に配置されている。
【００２６】
連通流入部２２は、後端側に接続口部２２ａを備え、接続口部２２ａは、後端を開口させて、エアバッグ１２から突出するように略円筒状に形成されている。連通流入部２２は、接続口部２２ａから直線状に前方に延びて、前席用流入部１４の上方まで配設されている。また、接続口部２２ａは、既述したように、インフレーター３５に外装されることとなる。
【００２７】
そして、前席用・後席用流入部１４・１８は、後述する区画結合部２９で区画され、かつ、車両Ｖの前後方向に沿って並設されて、上下方向に棒状に膨張する複数の膨張部１５・１９から構成されている。
【００２８】
前席用流入部１４の膨張部１５は、四つ配設されて、三つの一般膨張部１６と一つの下端変位膨張部１７とから構成されている。下端変位膨張部１７は、前席用流入部１４の後部側から二番目の膨張部１５として配設されており、この下端変位膨張部１７は、下端１７ａを他の一般膨張部１６の下端１６ａより上方位置に、配置させて、上下方向の長さ寸法が、他の一般膨張部１６の上下方向の長さ寸法より、短く構成されている。そして、この下端変位膨張部１７は、前席シート９の背もたれ部９ａの側方の上方位置に配置され、下端１７ａが背もたれ部９ａの側面側（車外側Ｏ）における上端部９ｂの上方位置に配置されている。
【００２９】
なお、各一般膨張部１６の下端１６ａは、背もたれ部９ａの上端部９ｂより下方位置に配置されている。また、各膨張部１６・１７の上端は、連通流入部２２に連通されている。
【００３０】
後席用流入部１８の膨張部１９も、四つ配設されて、三つの一般膨張部２０と一つの下端変位膨張部２１とから構成されている。下端変位膨張部２１は、後席用流入部１８の後端側の膨張部１９として配設されており、この下端変位膨張部２１は、下端２１ａを他の一般膨張部２０の下端２０ａより上方位置に、配置させて、上下方向の長さ寸法が、他の一般膨張部２０の上下方向の長さ寸法より、短く構成されている。そして、この下端変位膨張部２１は、後席シート１０の背もたれ部１０ａの側方の上方位置に配置され、下端２１ａが背もたれ部１０ａの側面側（車外側Ｏ）における上端部１０ｂの上方位置に配置されている。
【００３１】
なお、各一般膨張部２０の下端２０ａは、背もたれ部１０ａの上端部１０ｂより下方位置に配置されている。また、各膨張部２０・２１の上端は、連通流入部２２に連通されている。
【００３２】
さらに、前席用流入部１４の下端変位膨張部１７における前後方向の幅寸法ＢＦは、後席用流入部１８の下端変位膨張部２１における前後方向の幅寸法ＢＢより、大きく設定されている。実施形態の場合、下端変位膨張部１７の前後方向の幅寸法ＢＦは、１５０〜３００mm、下端変位膨張部２１の前後方向の幅寸法ＢＢは、１００〜２００mmとしている。
【００３３】
また、実施形態の場合、後述する板状部３０ｃの前後に配置される前席用流入部１４の後端側の一般膨張部１６Ｂと後席用流入部１８の前端側の一般膨張部２０Ｆとは、連通部２３を利用して、下端１６ａ・２０ａ相互で連通されている。
【００３４】
非流入部２４は、車内側壁部１３ａと車外側壁部１３ｂとを結合させたように構成されており、取付部２５、周縁部２６、区画結合部２９、及び、板状部３０、から構成されている。
【００３５】
実施形態の場合、周縁部２６は、ガス流入部１３の周囲で、後述する長方形板状部３０ｃの周囲を含めて、ガス流入部１３と接する部位に配設されて、ガス漏れが生じないように密に織成されている。そして、周縁部２６の下縁側部２８では、エアバッグ１２を非膨張状態で平らに展開させた際（図３参照）、下端変位膨張部１７・２１の下方の部位２８ｂ・２８ｅが、各下端変位膨張部１７・２１に隣接する一般膨張部１６・２０の下方の周縁部２６の部位２８ａ・２８ｃ・２８ｄと、下縁側の高さ位置を略一致させるように、上下方向の長さ寸法を長くして、形成されている。
【００３６】
取付部２５は、エアバッグ１２の上縁１２ａ側における周縁部２６の上縁側部２７や板状部３０（三角板状部３０ａ・３０ｂ）から上方へ突出するように、複数（実施形態では八個）配置されて、インナパネル２に取り付けるための取付ブラケット３２が固着されることとなる。各取付部２５には、取付ボルト３３を挿通させる取付孔２５ａが開口されている。
【００３７】
板状部３０は、エアバッグ１２の前端側と後端側とに配置される三角板状部３０ａ・３０ｂと、前席用流入部１４と後席用流入部１８との間における連通流入部２２と連通部２３との間に配設される長方形板状部３０ｃと、から構成されている。板状部３０は、エアバッグ１２の全体形状を確保するとともに、ガス流入部１３の容積を小さくして、膨張完了までの時間を短くするために設定されている。なお、前方側の三角板状部３０ａは、周縁部２６の前縁側から前方に突出するように配設され、後方側の三角板状部３０ｂは、周縁部２６の後縁側から後方に突出するように配設されている。また、長方形板状部３０ｃの周囲におけるガス流入部１３（前席用・後席用・連通流入部１４・１８・２２・連通部２３）との間にも、周縁部２６が配設されている。
【００３８】
区画結合部２９は、前席用・後席用流入部１４・１８の領域内で、周縁部２６の下縁側部２８から連通流入部２２まで上方に延びるような略「Ｔ」字形状として、車両Ｖの前後方向に複数並設されている。各区画結合部２９は、流入部１４・１８内を複数の膨張部１５（１６・１７）・１９（２０・２１）に区画するものであり、さらに、各流入部１４・１８が膨張用ガスＧを流入させて膨張した際、各流入部１４・１８の厚さを略均等にするために、配設されるとともに、接続口部２２ａ付近からエアバッグ１２の前部にかけての、すなわち、三角板状部３０ｂの後端の取付部２５から三角板状部３０ａの前端の取付部２５にかけての前後方向に張力を発揮させて、エアバッグ１２が、車内側Ｉや車外側Ｏへの押圧力を受けても、大きく揺動しないように、配設されている。
【００３９】
つぎに、このエアバッグ装置Ｍの車両Ｖへの搭載について説明すると、まず、エアバッグ１２を折り畳む。この折り畳み状態は、実施形態の場合、図３の二点鎖線に示すように、順次、山折りと谷折りとの折目Ｃを入れて、エアバッグ下縁１２ｂ側を上縁１２ａに接近させるような蛇腹折りとしている（図２参照）。
【００４０】
そして、折り畳んだ後には、折り崩れ防止用の破断可能なテープ３１（図２参照）により、エアバッグ１２の所定箇所をくるむとともに、インフレーター３５・取付ブラケット３２・３６を取り付けて、エアバッグ組立体を形成する。
【００４１】
その後、各取付ブラケット３２・３６をインナパネル２の所定位置に配置させ、各取付孔２５ａ等を挿通させてボルト３３・３７止めし、各取付ブラケット３２・３６をインナパネル２に固定して、エアバッグ組立体をボディ１に取り付ける。ついで、側突用センサ４１・ロールオーバセンサ４２・制御装置４３を車両Ｖに搭載するとともに、制御装置４３から延びる図示しない作動信号入力用のリード線をインフレーター３５に結線し、さらに、フロントピラーガーニッシュ４やルーフヘッドライニング５をボディ１に取り付け、さらに、リヤピラーガーニッシュ６・センターピラーガーニッシュ７をボディ１に取り付ければ、頭部保護エアバッグ装置Ｍを車両Ｖに搭載させることができる。
【００４２】
エアバッグ装置Ｍの車両Ｖへの搭載後、制御装置４３が、側突用センサ４１からの側突検知信号を入力させて、インフレーター３５を作動させれば、インフレーター３５は、膨張用ガスＧを吐出させる。すると、膨張用ガスＧが、図３の二点鎖線に示すように、接続口部２２ａからガス流入部１３の連通流入部２２内を前方側に流れ、さらに、連通流入部２２から下方に流れて各膨張部１６・１７・２０・２１内に供給され、エアバッグ１２の各流入部１４・１８が、折りを解消させつつ、膨張し始める。そして、エアバッグ１２は、くるんでおいたテープ３１を破断させ、さらに、フロントピラーガーニッシュ４やルーフヘッドライニング５の下縁側のエアバッグカバー８を押し開いて、図１・２の二点鎖線で示すように、開口Ｗ１・Ｗ２の上方から下方へ突出しつつ、開口Ｗ１・Ｗ２・センターピラー部ＣＰ・リヤピラー部ＲＰの車内側Ｉを覆うように、大きく展開膨張することとなる。
【００４３】
また、実施形態のエアバッグ装置Ｍでは、制御装置４３が、ロールオーバセンサ４２からのロールオーバ検知信号を入力させた際にも、インフレーター３５を作動させることから、その際にも、エアバッグ１２は、インフレーター３５からの膨張用ガスＧを流入させて、くるんでおいたテープ３１を破断させ、さらに、フロントピラーガーニッシュ４やルーフヘッドライニング５の下縁側のエアバッグカバー８を押し開いて、図１・２の二点鎖線で示すように、下方へ突出しつつ、開口Ｗ１・Ｗ２・センターピラー部ＣＰ・リヤピラー部ＲＰの車内側Ｉを覆うように、大きく展開膨張することとなる。
【００４４】
そして、実施形態のエアバッグ装置Ｍでは、折り畳まれたエアバッグ１２が、膨張用ガスＧを流入させて、展開膨張を完了させた際、下端変位膨張部１７・２１が、その下端１７ａ・２１ａを他の一般膨張部１６・２０の下端１６ａ・２０ａより上方位置に配置させて、シート９・１０の背もたれ部９ａ・１０ａにおける上端部９ｂ・１０ｂと干渉しないように、膨張する。すなわち、折り畳まれた各膨張部１５（１６・１７）・１９（２０・２１）が、連通流入部２２側の上方から下端１６ａ・１７ａ・２０ａ・２１ａ側の下方に流れる膨張用ガスＧによって、開口Ｗ１・Ｗ２の上縁側（エアバッグ上縁１２ａ側）から下方に展開膨張しても、下端変位膨張部１７・２１の下端１７ａ・２１ａが、シート背もたれ部９ａ・１０ａの車外側Ｏの上端部９ｂ・１０ｂと干渉しない。そして、他の一般膨張部１６・２０は、下端１６ａ・２０ａをシート９・１０の背もたれ部９ａ・１０ａの上端部９ｂ・１０ｂより下方に配置させて、車内側の開口Ｗ１・Ｗ２を広く覆うように、展開膨張させることができることから、エアバッグ１２の全体が、支障なく、展開膨張を完了させることができる。
【００４５】
したがって、実施形態の頭部保護エアバッグ装置Ｍでは、エアバッグ１２が車内側の開口Ｗ１・Ｗ２を広く覆えるように構成されていても、シート９・１０の背もたれ部９ａ・１０ａとの干渉を抑えて、円滑にエアバッグ１２を展開膨張させることができる。
【００４６】
そして、実施形態のエアバッグ装置Ｍでは、エアバッグ１２を非膨張状態で平らに展開させた際、図３に示すように、下端変位膨張部１７・２１の下方における周縁部下縁側部２８の部位２８ｂ・２８ｅが、下端変位膨張部１７・２１に隣接する一般膨張部１６・２０の下方における周縁部下縁側部２８の部位２８ａ・２８ｃ・２８ｄと、下縁側の高さ位置を、車両Ｖの前後方向に沿って、略一致させるように、形成されている。
【００４７】
そのため、エアバッグ１２の展開膨張完了時、下端変位膨張部１７・２１の下端１７ａ・２１ａが、他の一般膨張部１６・２０の下端１６ａ・２０ａより上方位置に配置されていても、図２の二点鎖線で示すように、下端変位膨張部１７・２１の下方側の周縁部下縁側部２８の部位２８ｂ・２８ｅは、背もたれ部９ａ・１０ａの上端部９ｂ・１０ｂと干渉して、車外側Ｏに屈曲されつつ、隣接する一般膨張部１６ａ・２０ａの下方側の周縁部下縁側部２８の部位２８ａ・２８ｃ・２８ｄと、極力、下縁側を略前後方向に沿って一致させるように、配置されることから、エアバッグ１２の下縁１２ｂ側に、前後方向に沿うテンションを発生させることが可能となる。そのため、展開膨張完了時のエアバッグ１２は、車内側Ｉや車外側Ｏへの押圧力を受けても、揺動を抑制されて、乗員を的確に拘束することができる。
【００４８】
特に、実施形態のエアバッグ１２では、複数の膨張部１６・１７・２０・２１が前後方向に沿って並設されて、展開膨張時、車両Ｖの前後方向にテンションを生じさせており、実施形態の場合、エアバッグ１２の下縁１２ｂ側にも、前後方向に沿うテンションを発生させることができることから、展開膨張完了時のエアバッグ１２は、車内側Ｉや車外側Ｏへの揺動を確実に抑制できて、乗員を一層的確に拘束することができる。
【００４９】
また、車両Ｖの前席シート９は、通常、後席シート１０に比べて、前後方向に長く移動調整可能に、構成されており、前席シート９が前後方向の長い範囲で移動調整されても、前席用流入部１４の下端変位膨張部１７が、後席用流入部１８の下端変位膨張部２１より、前後方向の幅寸法ＢＦを大きくして、形成されている。そのため、前席用流入部１４の下端変位膨張部１７が展開膨張しても、その下端変位膨張部１７の下端１７ａは、移動調整された前席シート９の背もたれ部９ａの上端部９ｂと干渉することが防止される。その結果、実施形態のエアバッグ装置Ｍは、前席・後席シート９・１０を備えた車両Ｖに搭載しても、円滑に、作動させることができる。
【００５０】
さらに、通常、前席シート９の背もたれ部９ａは、後席シート１０の背もたれ部１０ａに比べて、傾斜角度の調整範囲が大きく、前席シート９の背もたれ部９ａの傾斜角度を大きく調整しても、実施形態の頭部保護エアバッグ装置Ｍのエアバッグ１２では、容易に対処することができる。
【００５１】
また、実施形態のエアバッグ装置Ｍでは、インフレーター３５を作動させる制御装置４３が、車両Ｖの転倒を予測するロールオーバセンサ４２からのロールオーバ検知信号を入力させて、インフレーター３５を作動させるように構成されている。すなわち、実施形態では、車両Ｖの側面衝突時とロールオーバ時とに、ともに、エアバッグ１２が、展開膨張して、車内側開口Ｗ１・Ｗ２を広く覆うことが可能となるため、車両Ｖの側面衝突時のみならず、車両Ｖのロールオーバ時にも、エアバッグ１２が、乗員を的確に保護することができる。
【００５２】
なお、頭部保護エアバッグ装置Ｍのエアバッグとしては、図６に示すようなエアバッグ１２Ａを使用してもよい。このエアバッグ１２Ａは、区画結合部２９が、前席用・後席用流入部１４・１８の領域内で、下端２９ａ側を周縁部２６の下縁側部２８から離して、構成されて、各膨張部１５（１６・１７）相互と各膨張部１９（２０・２１）相互とが、それぞれ、下部側で連通されている。
【００５３】
そして、このエアバッグ１２Ａでも、前席用・後席用流入部１４・１８の下端変位膨張部１７・２１が、前席・後席シート９・１０の背もたれ部９ａ・１０ａの側方の上方位置に配置され、下端１７ａ・２１ａが背もたれ部９ａ・１０ａの上端部９ｂ・１０ｂの上方位置に配置されている。また、各一般膨張部１６・２０の下端１６ａ・２０ａは、背もたれ部９ａ・１０ａの上端部９ｂ・１０ｂより下方位置に配置されている。さらに、エアバッグ１２Ａの前席用流入部１４の下端変位膨張部１７における前後方向の幅寸法ＢＦが、後席用流入部１８の下端変位膨張部２１における前後方向の幅寸法ＢＢより、大きく設定されて、下端変位膨張部１７・２１の下方の周縁部下縁側部２８の部位２８ｂ・２８ｅが、下端変位膨張部１７・２１に隣接する一般膨張部１６・２０の下方の周縁部下縁側部２８の部位２８ａ・２８ｃ・２８ｄと、下縁側の高さ位置を略一致させるように、形成されている。
【００５４】
このようなエアバッグ１２Ａでも、実施形態のエアバッグ１２と同様な作用・効果を得ることができる。
【００５５】
さらに、このエアバッグ１２Ａでは、下端変位膨張部１７・２１に隣接する区画結合部２９の下端２９ａが、他の区画結合部２９の下端２９ａより上方に配置されて、下端変位膨張部１７・２１の下方の周縁部下縁側部２８の部位２８ｂ・２８ｅが、隣接する一般膨張部１６・２０の下方側まで延びるように、前後方向に長く上方へ隆起して配設されており、前席・後席シート９・１０の前後方向の移動距離が長くなったり、あるいは、背もたれ部９ａ・１０ａの傾斜角度の調整範囲が大きくなっても、一層、容易に対処することができる。
【００５６】
また、実施形態では、前後二列の前席・後席シート９・１０を配設させた車両Ｖに搭載されるエアバッグ装置Ｍについて説明したが、図７・８に示す頭部保護エアバッグ装置Ｍ１のように、前席シート９と後席シート１０との間に中間シート４９を配設させた三列シートの車両Ｖ１に対応するように、エアバッグ５２を構成してもよい。
【００５７】
このエアバッグ５２でも、中間シート４９の背もたれ部４９ａにおける車外側の上端部４９ｂと干渉しないように、中間開口Ｗ３を覆う中間流入部５４の各膨張部５５の内、中間シート４９の背もたれ部４９ａの側方に配置される膨張部５５が、下端５７ａを他の一般膨張部５６の下端５６ａより上方位置に配置させる下端変位膨張部５７として、背もたれ部４９ａの上端部４９ｂとの干渉を防止可能に構成されている。さらに、このエアバッグ５２でも、下端変位膨張部５７の下方の周縁部２６における下縁側部２８の部位２８ｇが、下端変位膨張部５７に隣接する一般膨張部５６の下方の周縁部下縁側部２８の部位２８ｆ・２８ｈと、下縁側の高さ位置を略一致させるように、形成されている。
【００５８】
このようなエアバッグ５２でも、エアバッグ１２・１２Ａと同様な作用・効果を得ることができる。
【００５９】
なお、実施形態では、エアバッグ１２を袋織りで形成したものを例示したが、エアバッグは、縫製・接着・高周波ウェルダ等を利用した溶着等によって、製造してもよい。
【図面の簡単な説明】
【図１】本発明に係る一実施形態の頭部保護エアバッグ装置の使用態様を示す車内側から見た概略正面図である。
【図２】図１のII−II部位の概略拡大断面図であり、エアバッグの展開膨張状態を二点鎖線で示した図である。
【図３】同実施形態に使用するエアバッグを平らに展開した状態を示す正面図である。
【図４】同実施形態のエアバッグを単体で膨張させた状態を示す部分拡大横断面図であり、図３のIV−IV部位が膨張した状態を示す。
【図５】同実施形態のエアバッグを単体で膨張させた状態を示す部分拡大縦断面図であり、図３のＶ−Ｖ部位が膨張した状態を示す。
【図６】他の実施形態に使用するエアバッグを平らに展開した状態を示す正面図である。
【図７】さらに他の実施形態の頭部保護エアバッグ装置の使用態様を示す車内側から見た概略正面図である。
【図８】図７に示す装置に使用するエアバッグを平らに展開した状態を示す正面図である。
【符号の説明】
１２・１２Ａ・５２…エアバッグ、
１３…ガス流入部、
１３ａ…車内側壁部、
１３ｂ…車外側壁部、
１４…前席用流入部、
１５・１９・５５…膨張部、
１６・２０・５６…一般膨張部、
１６ａ・２０ａ・５６ａ…（一般膨張部の）下端、
１７・２１・５７…下端変位膨張部、
１７ａ・２１ａ・５７ａ…（下端変位膨張部の）下端、
１８…後席用流入部、
２６…周縁部、
２８…下縁側部、
２９…区画結合部、
４１…側突用センサ、
４２…ロールオーバセンサ、
４３…制御装置、
４９…中間シート、
Ｖ・Ｖ１…車両、
Ｗ（Ｗ１・Ｗ２・Ｗ３）…開口、
Ｍ・Ｍ１…頭部保護エアバッグ装置。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a head protection airbag device mounted on a vehicle, and more specifically, an airbag is folded and stored on an upper edge side of an opening inside a vehicle at a side of a backrest portion of a seat, and an inflating gas. The present invention relates to a head protection airbag device that is deployed and inflated so as to cover an opening when inflowing.
[0002]
[Prior art and its problems]
In the conventional head protection airbag device, as described in Japanese Patent Laid-Open No. 2000-335356, the airbag is folded and stored on the upper edge side of an opening such as a door on the inside of the vehicle, and the inflation gas At the time of inflow, the vehicle expanded and expanded so as to cover the opening inside the vehicle.
[0003]
However, if the airbag is configured so that the length in the vertical direction is increased and the opening on the inside of the vehicle can be covered widely as the shape when deployment is completed, the seat backrest, particularly when deployed There is a possibility that the airbag may interfere with the expansion and inflation of the airbag by interfering with the upper end portion on the side surface side of the backrest portion.
[0004]
The present invention solves the above-mentioned problems, and even if the airbag is configured to cover the opening on the inner side of the vehicle, the airbag can be smoothly deployed while suppressing interference with the backrest portion of the seat. An object of the present invention is to provide a head protection airbag device that can be inflated.
[0005]
[Means for Solving the Problems]
  In the head protection airbag device according to the present invention, the airbag is folded and stored on the upper edge side of the opening on the inner side of the vehicle on the side of the backrest portion of the seat, and is deployed and inflated so as to cover the opening when inflating gas flows in. A head protection airbag device including an airbag to perform,
  The airbag includes a gas inflow portion for allowing the inflation gas to flow in, and a peripheral portion surrounding the gas inflow portion,
  The gas inflow portion is partitioned into a partition coupling portion in which a vehicle inner wall portion and a vehicle outer wall portion are combined, and a plurality of the gas inflow portions are arranged in parallel in the front-rear direction. And an inflatable portion that inflates so as to separate the vehicle outer wall portion,
  The inflating part arranged on the side of the backrest part is configured as a lower end displacement inflating part that causes the lower end to be positioned above the lower end of the other general inflating part, and is configured to prevent interference with the upper end part of the backrest part. ,
  The gas inflow portion includes a front seat inflow portion and a rear seat inflow portion disposed so as to cover the lateral openings of the front seat and the rear seat,
  The lower end displacement inflating portion is disposed in the front seat inflow portion and the rear seat inflow portion so as to correspond to the backrest portions of the front seat and the rear seat, respectively.
  The lower end displacement expansion portion of the front seat inflow portion has a width dimension in the front-rear direction set to be larger than a width dimension in the front-rear direction of the lower end displacement expansion portion of the rear seat inflow portion. Do.
[0006]
  When the airbag is deployed flat in a non-inflated state, a portion of a peripheral edge below the lower end displacement inflating portion is adjacent to the lower end displacement inflating portion.GeneralIt is desirable to form so that the peripheral part of the lower part of the inflating part and the height position on the lower edge side substantially coincide.
[0008]
Further, it is desirable that the airbag is configured to allow the inflation gas to flow in each of a side collision and a rollover of the vehicle.
[0009]
Note that the front-rear direction and the up-down direction in this specification correspond to the front-rear direction and the up-down direction of the vehicle when the airbag device is mounted on the vehicle.
[0010]
【The invention's effect】
  In the head protection airbag device according to the present invention, when the folded airbag flows in the inflation gas to complete the deployment and inflation, the lower end displacement inflating portion has its lower end placed on the other end.GeneralIt arrange | positions above a lower end of an expansion part, and it expand | swells so that it may not interfere with the upper end part in the backrest part of a sheet | seat. And otherGeneralSince the inflatable portion can be deployed and inflated so that the lower end is disposed below the upper end of the seat back and covers the vehicle interior opening, the entire airbag can be fully deployed without any problem. be able to.
[0011]
  Therefore, in the head protection airbag device according to the present invention, even if the airbag is configured to cover the opening on the inside of the vehicle, the airbag is smoothly deployed while suppressing interference with the seat back portion. Can be inflated.
  In addition, the front seat is configured so that it can be moved and adjusted longer in the front-rear direction than the rear seat, and even if the front seat is moved and adjusted in the long range in the front-rear direction, Since the lower end displacement expansion part is formed with a width dimension in the front-rear direction larger than the lower end displacement expansion part of the rear seat inflow part, the lower end displacement expansion part of the front seat inflow part expands and expands. However, the lower end of the lower end displacement inflating portion hardly interferes with the upper end portion of the backrest portion of the front seat that has been adjusted for movement. Therefore, the airbag apparatus according to the first aspect can be smoothly operated even when the airbag apparatus is mounted on a vehicle having a front seat and a rear seat.
[0012]
  AndClaim 2If the lower end of the lower end displacement inflating part is located above the lower end of the other general inflating part when the airbag is deployed and inflated, The peripheral edge part on the side interferes with the upper end part of the backrest part and is bent, so that the height part on the lower edge side is substantially matched with the peripheral edge part on the lower side of the adjacent general inflating part as much as possible. Therefore, a tension along the front-rear direction can be generated on the lower edge side of the airbag, and the airbag at the time of completion of deployment is subjected to a pressing force toward the inside or outside of the vehicle. However, swinging is suppressed and the occupant can be restrained accurately.
[0015]
  Also,Claim 3When the vehicle is configured as described in the above, the airbag can be expanded and inflated to cover the vehicle interior opening both during a vehicle side collision and during a rollover. The airbag can accurately protect the occupant not only at the time of collision but also at the time of rollover of the vehicle.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0017]
As shown in FIG. 1, the head protection airbag apparatus M according to the embodiment is configured such that the airbag 12 includes the lower edge side of the front pillar portion FP at the upper edge side periphery of the door W and the opening W of the window portion on the vehicle V. The lower side of the roof side rail portion RR and the upper side of the rear pillar portion RP are folded and stored. The vehicle V is configured to include a front seat 9 and a rear seat 10, and the airbag 12 has an upper opening W 1 on the side of the front seat 9 and the rear seat 10 when deployed. It is comprised so that the opening W2 of the upper side in a side may be covered.
[0018]
The head protection airbag device M includes an airbag 12, an inflator 35, mounting brackets 32 and 36, an airbag cover 8, a side collision sensor 41, a rollover sensor 42, and a control device 43. ing.
[0019]
As shown in FIG. 1, the inflator 35 is a cylinder type that supplies inflation gas to the folded airbag 12, and a connection port portion 22 a described later of the airbag 12 is externally provided. The inflator 35 is operated by inputting an operation signal from the control device 43.
[0020]
The control device 43 has a rollover sensor that predicts the vehicle V to fall when a side collision detection signal is input from the side collision sensor 41 when a predetermined impact or more is applied to the side surface of the vehicle V. When the rollover detection signal from 42 is input, an operation signal is output to the inflator 35. The side collision sensor 41, the rollover sensor 42, and the control device 43 are disposed at predetermined positions of the vehicle V and are electrically connected to each other. The inflator 35 is also electrically connected to the control device 43.
[0021]
The mounting bracket 36 is made of sheet metal, and sandwiches the inflator 35 with the connection port portion 22a of the airbag 12 from the outer peripheral side together with the connection port portion 22a. Using the two mounting bolts 37, the rear pillar portion RP It is comprised so that it may attach to the inner panel 2 made from a sheet metal of the body 1 side in the vehicle inside.
[0022]
As shown in FIGS. 1 and 2, the mounting bracket 32 is made of sheet metal and sandwiches each mounting portion 25 (to be described later) of the airbag 12. The mounting bolts 33 are installed in the mounting holes 25a of the mounting portions 25 and the mounting holes provided in the mounting brackets 32 in a state where the mounting portions 25 are sandwiched between the inner and outer plates. Each mounting portion 25 is attached to the inner panel 2 by being inserted into (not shown) and screwed into a nut 2b fixed to the periphery of the mounting hole 2a of the inner panel 2.
[0023]
As shown in FIGS. 1 and 2, the airbag cover 8 is configured from the lower edge side of each of the pillar garnish 4 arranged in the front pillar portion FP and the roof head lining 5 arranged in the roof side rail portion RR. Yes. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin and fixedly attached to the inner panel 2 of the body 1 inside the front pillar portion FP and the roof side rail portion RR. Further, the roof head lining 5 is disposed from the vicinity above the front pillar portion FP to the vicinity above the rear pillar portion RP via the center pillar portion CP.
[0024]
The airbag 12 is manufactured by bag weaving, and as shown in FIGS. 1 to 5, the inflation gas G from the inflator 35 flows in and expands from the folded state to open the openings W (W 1 and W 2) and the center. It is folded and stored on the upper edge side of the periphery of the openings W1 and W2 so as to cover the inside of the pillar garnish 7 of the pillar portion CP. As shown in FIG. 3, the airbag 12 has a gas inflow that allows the inflation gas G to flow into the interior by separating the vehicle interior side wall 13a and the vehicle exterior wall 13b (see FIGS. 4 and 5). It is comprised from the part 13 and the non-inflow part 24 which does not flow in the gas G for expansion.
[0025]
In the embodiment, the gas inflow portion 13 includes a front seat inflow portion 14, a rear seat inflow portion 18, a communication inflow portion 22, and a communication portion 23. The front seat inflow portion 14 is disposed below the front side of the communication inflow portion 22 and is disposed above the side of the front seat 9 of the vehicle V (the vehicle outer side O) when the airbag 12 is deployed and inflated. It expand | swells so that covered opening W1 may be covered. The rear seat inflow portion 18 is disposed below the rear side of the communication inflow portion 22 and is disposed above the side of the rear seat 10 of the vehicle V (the vehicle outer side O) when the airbag 12 is deployed and inflated. The opening W2 is covered. The communication portion 23 is disposed near the center in the front-rear direction on the lower edge 12b side of the airbag 12 so as to communicate the rear lower end portion of the front seat inflow portion 14 and the lower front end portion of the rear seat inflow portion 18. Yes.
[0026]
The communication inflow portion 22 includes a connection port portion 22 a on the rear end side, and the connection port portion 22 a is formed in a substantially cylindrical shape so as to protrude from the airbag 12 with the rear end opened. The communication inflow portion 22 extends straight forward from the connection port portion 22 a and is disposed up to the front seat inflow portion 14. Further, as described above, the connection port portion 22a is externally mounted on the inflator 35.
[0027]
The inflow portions 14 and 18 for the front seat and the rear seat are partitioned by a partition coupling portion 29 described later, and are arranged in parallel along the front-rear direction of the vehicle V and expand in a bar shape in the vertical direction. It is comprised from the expansion parts 15 and 19.
[0028]
Four inflating portions 15 of the inflow portion 14 for the front seat are arranged, and are composed of three general inflating portions 16 and one lower end displacement inflating portion 17. The lower end displacement expansion portion 17 is disposed as the second expansion portion 15 from the rear side of the front seat inflow portion 14, and the lower end displacement expansion portion 17 uses the lower end 17 a as the lower end 16 a of the other general expansion portion 16. It is arranged at a higher position, and the length dimension in the vertical direction is shorter than the length dimension in the vertical direction of the other general inflatable portions 16. And this lower end displacement expansion part 17 is arrange | positioned in the upper position of the side of the backrest part 9a of the front seat 9, and the lower end 17a is in the upper position of the upper end part 9b in the side surface side (vehicle outside O) of the backrest part 9a. Has been placed.
[0029]
In addition, the lower end 16a of each general expansion part 16 is arrange | positioned in the downward position rather than the upper end part 9b of the backrest part 9a. Further, the upper ends of the inflating portions 16 and 17 are communicated with the communication inflow portion 22.
[0030]
Four inflating portions 19 of the rear seat inflow portion 18 are also provided, and include three general inflating portions 20 and one lower end displacement inflating portion 21. The lower end displacement inflating part 21 is arranged as an inflating part 19 on the rear end side of the rear seat inflow part 18, and the lower end displacement inflating part 21 has a lower end 21 a above the lower end 20 a of the other general inflating part 20. It is arranged at the position, and the length dimension in the vertical direction is configured to be shorter than the length dimension in the vertical direction of the other general inflating portions 20. And this lower end displacement expansion part 21 is arrange | positioned in the upper position of the side of the backrest part 10a of the backseat seat 10, and the lower end 21a is in the upper position of the upper end part 10b in the side surface side (vehicle outside O) of the backrest part 10a. Has been placed.
[0031]
In addition, the lower end 20a of each general expansion part 20 is arrange | positioned in the downward position rather than the upper end part 10b of the backrest part 10a. The upper ends of the inflating parts 20 and 21 are in communication with the communication inflow part 22.
[0032]
Further, the width dimension BF in the front-rear direction of the lower end displacement inflating portion 17 of the front seat inflow portion 14 is set larger than the width dimension BB in the front and rear direction of the lower end displacement inflating portion 21 of the rear seat inflow portion 18. In the case of the embodiment, the width dimension BF in the front-rear direction of the lower end displacement expansion part 17 is 150 to 300 mm, and the width dimension BB in the front-rear direction of the lower end displacement expansion part 21 is 100 to 200 mm.
[0033]
  In the case of the embodiment,It arrange | positions before and after the plate-shaped part 30c mentioned later.The general expansion portion 16B on the rear end side of the front seat inflow portion 14 and the general expansion portion 20F on the front end side of the rear seat inflow portion 18 communicate with each other.23Use the bottom edge16a / 20aThey are in communication with each other.
[0034]
The non-inflow portion 24 is configured such that the vehicle inner wall portion 13a and the vehicle outer wall portion 13b are combined, and includes a mounting portion 25, a peripheral edge portion 26, a partition connecting portion 29, and a plate-like portion 30. Has been.
[0035]
In the case of the embodiment, the peripheral edge portion 26 is disposed around the gas inflow portion 13 at a portion in contact with the gas inflow portion 13 including the periphery of a rectangular plate-shaped portion 30c described later so that no gas leakage occurs. Closely woven. When the airbag 12 is flatly deployed in the non-inflated state at the lower edge side portion 28 of the peripheral edge portion 26 (see FIG. 3), the lower portions 28b and 28e below the lower end displacement inflating portions 17 and 21 are provided at the lower ends. The length dimension in the vertical direction is set so that the positions 28a, 28c and 28d of the peripheral edge 26 below the general expansion portions 16 and 20 adjacent to the displacement expansion portions 17 and 21 and the height position on the lower edge side substantially coincide with each other. Long and formed.
[0036]
A plurality of mounting portions 25 (eight in the embodiment) are provided so as to protrude upward from the upper edge side portion 27 and the plate-like portion 30 (triangular plate-like portions 30a and 30b) of the peripheral edge portion 26 on the upper edge 12a side of the airbag 12. ) And the mounting bracket 32 for mounting to the inner panel 2 is fixed. Each attachment portion 25 has an attachment hole 25a through which the attachment bolt 33 is inserted.
[0037]
The plate-like portion 30 includes triangular plate-like portions 30 a and 30 b disposed on the front end side and the rear end side of the airbag 12, and a communication inflow portion 22 between the front seat inflow portion 14 and the rear seat inflow portion 18. And a rectangular plate portion 30c disposed between the communication portion 23 and the communication portion 23. The plate-like portion 30 is set in order to secure the overall shape of the airbag 12 and to reduce the volume of the gas inflow portion 13 to shorten the time until completion of the inflation. The front triangular plate-like portion 30a is disposed so as to protrude forward from the front edge side of the peripheral edge portion 26, and the rear triangular plate-like portion 30b is protruded rearward from the rear edge side of the peripheral edge portion 26. It is arranged. Further, a peripheral edge portion 26 is disposed between the gas inflow portion 13 (front seat / rear seat / communication inflow portions 14, 18, 22, and communication portion 23) around the rectangular plate portion 30c. Yes.
[0038]
The partition coupling portion 29 has a substantially “T” shape that extends upward from the lower edge side portion 28 of the peripheral edge portion 26 to the communication inflow portion 22 in the area of the front seat / rear seat inflow portions 14, 18. A plurality of the vehicles V are arranged in the front-rear direction. Each partition coupling portion 29 partitions the inside of the inflow portions 14 and 18 into a plurality of expansion portions 15 (16, 17), 19 (20, 21). When the G is inflated and inflated, the inflow portions 14 and 18 are disposed in order to make the thicknesses substantially uniform, and the triangular plate extends from the vicinity of the connection port portion 22a to the front portion of the airbag 12, that is, a triangular plate. The airbag 12 receives a pressing force toward the vehicle inner side I or the vehicle outer side O by exerting tension in the front-rear direction from the mounting portion 25 at the rear end of the hook-shaped portion 30b to the mounting portion 25 at the front end of the triangular plate-shaped portion 30a. However, it is arranged so as not to swing greatly.
[0039]
Next, the mounting of the airbag apparatus M on the vehicle V will be described. First, the airbag 12 is folded. In the case of the embodiment, as shown by the two-dot chain line in FIG. 3, the folded state is made by sequentially inserting a fold C of a mountain fold and a valley fold so that the airbag lower edge 12b side approaches the upper edge 12a. Such a bellows fold is used (see FIG. 2).
[0040]
Then, after folding, a predetermined portion of the airbag 12 is wrapped with a breakable tape 31 (see FIG. 2) for preventing collapse, and the inflator 35 and the mounting brackets 32 and 36 are attached to the airbag assembly. Form.
[0041]
Thereafter, the mounting brackets 32 and 36 are arranged at predetermined positions of the inner panel 2, the mounting holes 25a and the like are inserted and bolts 33 and 37 are fixed, and the mounting brackets 32 and 36 are fixed to the inner panel 2, The airbag assembly is attached to the body 1. Next, the side collision sensor 41, the rollover sensor 42, and the control device 43 are mounted on the vehicle V, and a lead wire for operating signal input (not shown) extending from the control device 43 is connected to the inflator 35. Further, the front pillar garnish 4 and the roof head lining 5 are attached to the body 1, and the rear pillar garnish 6 and the center pillar garnish 7 are attached to the body 1, so that the head protection airbag device M can be mounted on the vehicle V.
[0042]
After the air bag device M is mounted on the vehicle V, if the control device 43 inputs the side collision detection signal from the side collision sensor 41 and operates the inflator 35, the inflator 35 will cause the inflation gas G to flow. Discharge. Then, as shown by a two-dot chain line in FIG. 3, the expansion gas G flows from the connection port portion 22 a to the front side in the communication inflow portion 22 of the gas inflow portion 13, and further flows downward from the communication inflow portion 22. The inflow portions 14, 18 of the airbag 12 start to inflate while eliminating the folding. Then, the airbag 12 breaks the wrapped tape 31, and further pushes open the airbag cover 8 on the lower edge side of the front pillar garnish 4 and the roof head lining 5, along the two-dot chain line in FIGS. As shown in the figure, it expands and expands greatly so as to cover the vehicle interior I of the openings W1, W2, the center pillar portion CP, and the rear pillar portion RP while protruding downward from above the openings W1, W2.
[0043]
In the airbag apparatus M of the embodiment, the control apparatus 43 operates the inflator 35 even when the rollover detection signal from the rollover sensor 42 is input. The inflating gas G from the inflator 35 is caused to flow, the wrapped tape 31 is broken, and the airbag cover 8 on the lower edge side of the front pillar garnish 4 and the roof head lining 5 is pushed open. As shown by the two-dot chain lines of 1 and 2, it expands and expands greatly so as to cover the vehicle interior I of the openings W1, W2, the center pillar portion CP, and the rear pillar portion RP while protruding downward.
[0044]
In the airbag apparatus M according to the embodiment, when the folded airbag 12 flows in the inflation gas G to complete the deployment and inflation, the lower end displacement inflating portions 17 and 21 have the lower ends 17a and 21a. Is placed above the lower ends 16a and 20a of the other general inflating portions 16 and 20, and expands so as not to interfere with the upper end portions 9b and 10b of the backrest portions 9a and 10a of the seats 9 and 10. That is, each of the folded expansion portions 15 (16, 17), 19 (20, 21) is expanded by the expansion gas G flowing from the upper side of the communication inflow portion 22 to the lower side of the lower ends 16a, 17a, 20a, 21a. Even if the lower ends 17a and 21a of the lower end displacement inflating portions 17 and 21 are deployed and inflated downward from the upper edge side (airbag upper edge 12a side) of the openings W1 and W2, the upper ends of the vehicle seat outside seats 9a and 10a It does not interfere with the parts 9b and 10b. And other general expansion parts 16 and 20 arrange lower ends 16a and 20a below upper end parts 9b and 10b of backrest parts 9a and 10a of seats 9 and 10, and cover opening W1 and W2 inside a car widely As described above, since the airbag 12 can be deployed and inflated, the entire airbag 12 can be completely deployed without any trouble.
[0045]
Therefore, in the head protection airbag device M of the embodiment, even if the airbag 12 is configured to widely cover the openings W1 and W2 on the vehicle interior side, the interference with the backrest portions 9a and 10a of the seats 9 and 10 is possible. Thus, the airbag 12 can be smoothly expanded and inflated.
[0046]
In the airbag apparatus M according to the embodiment, when the airbag 12 is flatly deployed in the non-inflated state, as shown in FIG. 3, the part of the peripheral edge lower edge side portion 28 below the lower end displacement inflating portions 17 and 21. 28b and 28e indicate the positions 28a, 28c and 28d of the peripheral edge lower edge side portion 28 below the general expansion portions 16 and 20 adjacent to the lower end displacement expansion portions 17 and 21, and the height positions on the lower edge side in the front and rear of the vehicle V. It is formed so as to substantially match along the direction.
[0047]
Therefore, even when the lower ends 17a and 21a of the lower end displacement inflating portions 17 and 21 are disposed above the lower ends 16a and 20a of the other general inflating portions 16 and 20 when the airbag 12 has been deployed and inflated, FIG. As shown by the two-dot chain line, the portions 28b and 28e of the peripheral edge lower edge side portion 28 on the lower side of the lower end displacement inflating portions 17 and 21 interfere with the upper end portions 9b and 10b of the backrest portions 9a and 10a. While being bent to O, the lower edge side of the peripheral lower edge side portion 28 on the lower side of the adjacent general inflating portions 16a and 20a is arranged so that the lower edge side coincides with the lower edge side as much as possible in the longitudinal direction. Therefore, it is possible to generate a tension along the front-rear direction on the lower edge 12b side of the airbag 12. Therefore, even when the airbag 12 at the completion of the deployment and inflation receives a pressing force to the vehicle inner side I or the vehicle outer side O, the swinging is suppressed and the occupant can be restrained accurately.
[0048]
In particular, in the airbag 12 of the embodiment, a plurality of inflatable portions 16, 17, 20, 21 are arranged in parallel in the front-rear direction, and tension is generated in the front-rear direction of the vehicle V during deployment. In the case of the configuration, since the tension along the front-rear direction can also be generated on the lower edge 12b side of the airbag 12, the airbag 12 at the time of completion of the deployment and inflation swings toward the vehicle inner side I or the vehicle outer side O. It can suppress reliably and can restrain a passenger | crew more appropriately.
[0049]
In addition, the front seat 9 of the vehicle V is usually configured to be movable and adjustable in the front-rear direction compared to the rear seat 10, and the front seat 9 is moved and adjusted in a long range in the front-rear direction. Also, the lower end displacement inflating portion 17 of the front seat inflow portion 14 is formed with a width dimension BF in the front-rear direction larger than that of the lower end displacement inflating portion 21 of the rear seat inflow portion 18. Therefore, even if the lower end displacement expansion portion 17 of the front seat inflow portion 14 is deployed and expanded, the lower end 17a of the lower end displacement expansion portion 17 interferes with the upper end portion 9b of the backrest portion 9a of the front seat 9 that has been adjusted. Is prevented. As a result, the airbag apparatus M according to the embodiment can be smoothly operated even when the airbag apparatus M is mounted on the vehicle V including the front seats and the rear seats 9 and 10.
[0050]
Furthermore, the backrest portion 9a of the front seat 9 has a larger adjustment range of the inclination angle than the backrest portion 10a of the rear seat 10, and the inclination angle of the backrest portion 9a of the front seat 9 is adjusted to be larger. However, the airbag 12 of the head protection airbag device M of the embodiment can be easily dealt with.
[0051]
In the airbag apparatus M of the embodiment, the control device 43 that operates the inflator 35 inputs the rollover detection signal from the rollover sensor 42 that predicts the vehicle V to fall, and operates the inflator 35. It is configured. That is, in the embodiment, the airbag 12 can be expanded and inflated to cover the vehicle interior openings W1 and W2 both at the time of a side collision and rollover of the vehicle V. The airbag 12 can accurately protect the occupant not only at the time of a side collision but also at the time of rollover of the vehicle V.
[0052]
In addition, as an airbag of the head protection airbag apparatus M, an airbag 12A as shown in FIG. 6 may be used. In the airbag 12A, the partition coupling portion 29 is configured by separating the lower end 29a side from the lower edge side portion 28 of the peripheral edge portion 26 in the region of the front seat / rear seat inflow portions 14 and 18. The expansion parts 15 (16, 17) and the respective expansion parts 19 (20, 21) communicate with each other on the lower side.
[0053]
Also in this airbag 12A, the lower end displacement inflating portions 17 and 21 of the front seat and rear seat inflow portions 14 and 18 are located above the back portions 9a and 10a of the front seat and rear seats 9 and 10. The lower ends 17a and 21a are arranged above the upper end portions 9b and 10b of the backrest portions 9a and 10a. Moreover, lower end 16a * 20a of each general expansion part 16 * 20 is arrange | positioned in the lower position rather than upper end part 9b * 10b of the backrest part 9a * 10a. Further, the width dimension BF in the front-rear direction of the lower end displacement inflating portion 17 of the front seat inflow portion 14 of the airbag 12A is set larger than the width dimension BB in the front and rear direction of the lower end displacement inflating portion 21 of the rear seat inflow portion 18. Thus, the portions 28b and 28e of the lower edge side edge portion 28 below the lower end displacement expansion portions 17 and 21 are located on the lower edge side portion 28 of the lower edge portion of the general expansion portions 16 and 20 adjacent to the lower end displacement expansion portions 17 and 21. It forms so that site | part 28a * 28c * 28d and the height position of a lower edge side may correspond substantially.
[0054]
Even with such an airbag 12A, it is possible to obtain the same operations and effects as the airbag 12 of the embodiment.
[0055]
Further, in the airbag 12A, the lower end 29a of the partition coupling portion 29 adjacent to the lower end displacement inflating portions 17 and 21 is disposed above the lower end 29a of the other partition coupling portion 29, and the lower end displacement inflating portions 17 and 21 are disposed. The lower portion 28b and 28e of the lower edge side portion 28 of the lower edge of the upper and lower sides of the general inflating portion 16 and 20 are extended upward in the front-rear direction so as to extend to the lower side. Even if the movement distance of the seats 9 and 10 in the front-rear direction is increased, or the adjustment range of the inclination angle of the backrest portions 9a and 10a is increased, it can be dealt with more easily.
[0056]
Further, in the embodiment, the airbag apparatus M mounted on the vehicle V in which the front and rear seats 9 and 10 in the front and rear rows are arranged has been described, but the head protection airbag shown in FIGS. The airbag 52 may be configured to correspond to a three-row seat vehicle V1 in which an intermediate seat 49 is disposed between the front seat 9 and the rear seat 10 as in the device M1.
[0057]
Also in the airbag 52, the backrest portion 49a of the intermediate seat 49 among the inflating portions 55 of the intermediate inflow portion 54 that covers the intermediate opening W3 so as not to interfere with the upper end portion 49b on the vehicle outer side of the backrest portion 49a of the intermediate seat 49. Can be prevented from interfering with the upper end portion 49b of the backrest portion 49a as the lower end displacement inflating portion 57 that places the lower end 57a above the lower end 56a of the other general expansion portion 56. It is configured. Further, also in the airbag 52, a portion 28 g of the lower edge side portion 28 in the peripheral edge portion 26 below the lower end displacement inflating portion 57 is formed on the peripheral edge lower edge side portion 28 below the general inflating portion 56 adjacent to the lower end displacement inflating portion 57. The portions 28f and 28h are formed so as to substantially coincide with the height position on the lower edge side.
[0058]
Even with such an airbag 52, it is possible to obtain the same functions and effects as the airbags 12 and 12A.
[0059]
In the embodiment, the airbag 12 is formed by bag weaving, but the airbag may be manufactured by sewing, bonding, welding using a high-frequency welder, or the like.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a usage mode of a head protection airbag device according to an embodiment of the present invention as viewed from the vehicle inner side.
2 is a schematic enlarged cross-sectional view taken along a line II-II in FIG. 1, and is a view showing a deployed and inflated state of an airbag by a two-dot chain line.
FIG. 3 is a front view showing a state in which the airbag used in the embodiment is flatly deployed.
4 is a partial enlarged cross-sectional view showing a state in which the airbag according to the embodiment is inflated alone, and shows a state in which the IV-IV portion in FIG. 3 is inflated;
5 is a partially enlarged longitudinal sectional view showing a state in which the airbag according to the embodiment is inflated as a single body, and shows a state in which a VV portion in FIG. 3 is inflated; FIG.
FIG. 6 is a front view showing a state in which an airbag used in another embodiment is flatly deployed.
FIG. 7 is a schematic front view showing the usage state of the head protecting airbag device of still another embodiment as viewed from the vehicle inner side.
8 is a front view showing a state in which an airbag used in the apparatus shown in FIG. 7 is flatly deployed. FIG.
[Explanation of symbols]
12.12A.52 ... Airbag,
13: Gas inflow part,
13a ... Car interior side wall,
13b ... car outer wall part,
14 ... Inlet for front seat,
15, 19, 55 ... inflatable part,
16, 20, 56 ... General expansion part,
16a, 20a, 56a ... lower end (of the general expansion part),
17, 21, 57 ... lower end displacement expansion part,
17a, 21a, 57a ... lower end (of the lower end displacement expansion part),
18 ... Rear seat inflow part,
26 ... peripheral part,
28 ... lower edge side,
29 ... division coupling part,
41 ... Sensor for side collision,
42 ... Rollover sensor,
43. Control device,
49. Intermediate sheet,
V ・ V1 ... Vehicle,
W (W1, W2, W3) ... opening,
M · M1: Head protection airbag device.

Claims

A head protection airbag device including an airbag that is folded and stored on the upper edge side of the opening on the inner side of the vehicle on the side of the backrest portion of the seat, and that expands and expands so as to cover the opening when the inflation gas flows in. Because
The airbag includes a gas inflow portion for allowing the inflation gas to flow in, and a peripheral portion surrounding the gas inflow portion,
The gas inflow portion is partitioned into a partition coupling portion in which a vehicle inner wall portion and a vehicle outer wall portion are combined, and a plurality of the gas inflow portions are arranged in parallel in the front-rear direction. And an inflatable portion that inflates so as to separate the vehicle outer wall portion,
The inflating part arranged on the side of the backrest part is configured as a lower end displacement inflating part that causes the lower end to be positioned above the lower end of the other general inflating part, and is configured to prevent interference with the upper end part of the backrest part. ,
The gas inflow portion includes a front seat inflow portion and a rear seat inflow portion disposed so as to cover the lateral openings of the front seat and the rear seat,
The lower end displacement inflating portion is disposed in the front seat inflow portion and the rear seat inflow portion so as to correspond to the backrest portions of the front seat and the rear seat, respectively.
The lower end displacement expansion portion of the front seat inflow portion has a width dimension in the front-rear direction set to be larger than a width dimension in the front-rear direction of the lower end displacement expansion portion of the rear seat inflow portion. Head protection airbag device.

When flatly deployed in a non-inflated state, the peripheral portion of the airbag below the lower end displacement inflating portion has a lower peripheral portion below the general inflating portion adjacent to the lower end displacement inflating portion and the lower portion. 2. The head protection airbag device according to claim 1 , wherein the head protection airbag device is formed so as to substantially match the height position on the edge side.

The head protection according to claim 1 or 2 , wherein the airbag is configured to allow the inflation gas to flow in each of a side collision and a rollover of a vehicle. Airbag device.