JP3589030B2

JP3589030B2 - Head protection airbag device for front and rear seats

Info

Publication number: JP3589030B2
Application number: JP17286598A
Authority: JP
Inventors: 光由大野; 雅春谷野; 学大塚; 悦久三村
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 1998-06-19
Filing date: 1998-06-19
Publication date: 2004-11-17
Anticipated expiration: 2018-06-19
Also published as: JP2000006749A

Description

【０００１】
【発明の属する技術分野】
本発明は、車体側部への所定の高荷重作用時にインフレータからガスを噴出させ、このガスによってピラー部からルーフサイドレール部に沿ってエアバッグ袋体をカーテン状に膨張させる頭部保護エアバッグ装置に関する。
【０００２】
【従来の技術】
車体側部への所定の高荷重作用時における前席に着座した乗員の頭部の保護性能を向上させるべく、フロントピラー部からルーフサイドレール部に跨がって折り畳み状態で格納されたエアバッグ袋体を、サイドウインドガラスに沿ってカーテン状に膨張させる乗員保護装置が既に提案されている。以下、この種の乗員保護装置を開示したＷＯ９６／２６０８７号公報に示される構成について説明する。
【０００３】
図１０に示される如く、この乗員保護装置１００は、フロントピラー（Ａピラー）部１０２からルーフサイドレール部１０４を通りクォーターピラー（Ｃピラー）部１０５に跨がって配設された長尺状のダクト１０６と、このダクト１０６内に折り畳み状態で格納されると共に前端固定点１０８及び後端固定点１１０にて車体側に固定されたエアバッグ袋体１１２と、ホース１１４を介してダクト１０６の中間部と接続されると共に車体側部への所定の高荷重作用時にガスを噴出するインフレータ１１６と、を主要構成要素として構成されている。さらに、エアバッグ袋体１１２は、各々略円筒状に形成されかつ車両上下方向を長手方向として配置された複数のセル１２０を連接させることにより構成されている。
【０００４】
上記構成によれば、車体側部への所定の高荷重作用時になると、インフレータ１１６からガスが噴出される。このため、噴出されたガスは、ホース１１４及びダクト１０６を介して折り畳み状態のエアバッグ袋体１１２の各セル１２０内へ流入される。その結果、各セル１２０が車両上下方向を長手方向として略円筒状に膨張し、これによりエアバッグ袋体１１２がウインドガラス１２２に沿ってカーテン状に膨張される。また、エアバッグ袋体１１２の中間部がセンタピラー部１２４の上部内側に配置されるようになっている。
【０００５】
【発明が解決しようとする課題】
しかしながら、上述したような頭部保護エアバッグ装置においては、エアバッグ袋体１１２の後部を後席側方のルーフサイドレール部１０４に格納する必要がある。一方、後席側方のルーフサイドレール部１０４には、後席用エアコン吹出し口が設定されている車両があり、このような車両においては、後席用エアコン吹出し口を避けた部位にエアバッグ袋体１１２の後部を格納しなければならず、エアバッグ袋体１１２の格納スペースが小さくなり、エアバッグ袋体１１２が格納し難い。また、エアバッグ袋体１１２の格納スペースを確保するために、後席用エアコン吹出し口を所望の位置へ配設できない場合もある。
【０００６】
本発明は上記事実を考慮し、エアバッグ袋体の格納性能を満足した上で後席用エアコン吹出し口の設計自由度を上げることができる前後席用頭部保護エアバッグ装置を得ることが目的である。
【０００７】
【課題を解決するための手段】
請求項１記載の本発明は、Ａピラーからルーフサイドレールを経てＣピラーに跨がってカーテン状に展開するエアバッグ袋体を有する前後席用頭部保護エアバッグ装置において、
前記エアバッグ袋体の前席乗員頭部保護用膨張部と後席乗員頭部保護用膨張部との間の中間部を構成し、折り畳み状態での体積が、同面積の前記エアバッグ袋体の基布より小さい中間部形成部材と、
前記ルーフサイドレールにおける前記中間部形成部材を格納する部位に配設された部材と、
を有することを特徴とする。
【０００８】
従って、エアバッグ袋体を折り畳んだ状態では、中間部形成部材で構成したエアバッグ袋体の中間部の体積が、中間部形成部材と同面積のエアバッグ袋体の基布の折り畳んだ状態での体積より小さくなる。この結果、ルーフサイドレールにおけるエアバッグ袋体の中間部を格納する部位に、後席用エアコン吹出し口、アシストグリップ等の部材を配設しても、折り畳んだエアバッグ袋体の中間部を小さいスペースに格納できるため、エアバッグ袋体の格納性能を満足できる。また、エアバッグ袋体の格納スペースをむりに広げる必要が無いため、後席用エアコン吹出し口を所望の位置へ配設できる。即ち、後席用エアコン吹出し口の設計自由度を上げることができる。
【０００９】
請求項２記載の本発明は、請求項１記載の前後席用頭部保護エアバッグ装置において、前記中間部形成部材は少なくとも前記前席乗員頭部保護用膨張部の下端部と前記後席乗員頭部保護用膨張部の下端部とを連結するテンションライン形成部を有することを特徴とする。
【００１０】
従って、請求項１記載の内容に加えて、エアバッグ袋体展開時には、テンションライン形成部により、前席乗員頭部保護用膨張部の下端部と後席乗員頭部保護用膨張部の下端部とが連結され、エアバッグ袋体の下部を前後方向に沿って延びるテンションラインが形成される。このため、エアバッグ袋体の乗員支持効果がより確実なものとなる。
請求項３記載の本発明は、Ａピラーからルーフサイドレールを経てＣピラーに跨がってカーテン状に展開するエアバッグ袋体を有する前後席用頭部保護エアバッグ装置において、
前記エアバッグ袋体の前席乗員頭部保護用膨張部と後席乗員頭部保護用膨張部との間の中間部を構成し、折り畳み状態での体積が、同面積の前記エアバッグ袋体の基布より小さい薄布と、
前記ルーフサイドレールにおける前記薄布を格納する部位に配設された部材と、
を有することを特徴とする。
従って、エアバッグ袋体を折り畳んだ状態では、薄布で構成したエアバッグ袋体の中間部の体積が、薄布と同面積のエアバッグ袋体の基布の折り畳んだ状態での体積より小さくなる。この結果、ルーフサイドレールにおけるエアバッグ袋体の中間部を格納する部位に、後席用エアコン吹出し口、アシストグリップ等の部材を配設しても、折り畳んだエアバッグ袋体の中間部を小さいスペースに格納できるため、エアバッグ袋体の格納性能を満足できる。また、エアバッグ袋体の格納スペースをむりに広げる必要が無いため、後席用エアコン吹出し口を所望の位置へ配設できる。即ち、後席用エアコン吹出し口の設計自由度を上げることができる。
請求項４記載の本発明は、請求項３記載の前後席用頭部保護エアバッグ装置において、前記薄布は少なくとも前記前席乗員頭部保護用膨張部の下端部と前記後席乗員頭部保護用膨張部の下端部とを連結するテンションライン形成部を有することを特徴とする。
従って、請求項３記載の内容に加えて、エアバッグ袋体展開時には、テンションライン形成部により、前席乗員頭部保護用膨張部の下端部と後席乗員頭部保護用膨張部の下端部とが連結され、エアバッグ袋体の下部を前後方向に沿って延びるテンションラインが形成される。このため、エアバッグ袋体の乗員支持効果がより確実なものとなる。
請求項５記載の本発明は、Ａピラーからルーフサイドレールを経てＣピラーに跨がってカーテン状に展開するエアバッグ袋体を有する前後席用頭部保護エアバッグ装置において、
前記エアバッグ袋体の前席乗員頭部保護用膨張部と後席乗員頭部保護用膨張部との間の中間部を構成し、折り畳み状態での体積が、同面積の前記エアバッグ袋体の基布より小さい網と、
前記ルーフサイドレールにおける前記網を格納する部位に配設された部材と、
を有することを特徴とする。
従って、エアバッグ袋体を折り畳んだ状態では、網で構成したエアバッグ袋体の中間部の体積が、網と同面積のエアバッグ袋体の基布の折り畳んだ状態での体積より小さくなる。この結果、ルーフサイドレールにおけるエアバッグ袋体の中間部を格納する部位に、後席用エアコン吹出し口、アシストグリップ等の部材を配設しても、折り畳んだエアバッグ袋体の中間部を小さいスペースに格納できるため、エアバッグ袋体の格納性能を満足できる。また、エアバッグ袋体の格納スペースをむりに広げる必要が無いため、後席用エアコン吹出し口を所望の位置へ配設できる。即ち、後席用エアコン吹出し口の設計自由度を上げることができる。
請求項６記載の本発明は、請求項５記載の前後席用頭部保護エアバッグ装置において、前記網は少なくとも前記前席乗員頭部保護用膨張部の下端部と前記後席乗員頭部保護用膨張部の下端部とを連結するテンションライン形成部を有することを特徴とする。
従って、請求項５記載の内容に加えて、エアバッグ袋体展開時には、テンションライン形成部により、前席乗員頭部保護用膨張部の下端部と後席乗員頭部保護用膨張部の下端部とが連結され、エアバッグ袋体の下部を前後方向に沿って延びるテンションラインが形成される。このため、エアバッグ袋体の乗員支持効果がより確実なものとなる。
【００１１】
【発明の実施の形態】
本発明の前後席用頭部保護エアバッグ装置の第１実施形態を図１〜図５に従って説明する。
【００１２】
なお、図中矢印ＦＲは車両前方方向を、矢印ＵＰは車両上方方向を、矢印ＩＮは車幅内側方向を示す。
【００１３】
図３に示される如く、前後席用頭部保護エアバッグ装置１０は、側突状態を検出するためのセンサ１２と、作動することによりガスを噴出する円柱状のインフレータ１４と、所定の折り畳み方で折り畳まれたエアバッグ袋体１６と、を主要構成要素として構成されている。センサ１２は、センタピラー（Ｂピラー）１８の下端部付近に配設されており、所定値以上の側突荷重が車体側部に作用した場合に側突状態を検出するようになっている。
【００１４】
インフレータ１４はＡピラー（フロントピラー）２０のインストルメントパネル２２との接続部付近に配設されており、前述したセンサ１２と接続されている。従って、センサ１２が側突状態を検出すると、インフレータ１４が作動するようになっている。
【００１５】
なお、エアバッグ袋体１６は、基布の外面全面に、気密性の高い樹脂、例えばシリコン系樹脂に、ナイロンや炭素等から成る微細な繊維を混入し、引っ張り強度を上げたコーティング材が塗布されている。
【００１６】
エアバッグ袋体１６は図３に二点鎖線で示される展開状態でカーテン状となっており、フロントサイドウインドガラス２８、センタピラー１８、リヤサイドウインドガラス３０の各上部及び中央部を覆っている。また、エアバッグ袋体１６には、側面視で前席着座乗員３４の頭部３４Ａの側方と、センタピラー１８の上部の側方に展開する前席乗員頭部保護用膨張部としての前席用膨張室４０、４２、４４、４６と、後席着座乗員３６の頭部３６Ａの側方に展開する後席乗員頭部保護用膨張部としての後席用膨張室４８、５０、５１とを備えている。なお、前席用膨張室４０、４２、４４、４６の間及び後席用膨張室４８、５０、５１の間には、それぞれエアバッグ袋体１６の上下方向略中央部に略上下方向へ伸びる非膨張部３９が形成されており、各膨張室４０、４２、４４、４６、４８、５０、５１は、略上下方向に延びる略筒状となっている。また、インフレータ１４と各膨張室４０、４２、４４、４６、４８、５０、５１は、ガス供給通路５２によって連結されており、ガス供給通路５２はエアバッグ袋体１６の上側周縁部１６Ａに沿って形成されている。
【００１７】
図１に示される如く、後席用膨張室５０の前後方向略中央部には、エアバッグ袋体１６の上側周縁部１６Ａから下方へ延びる非膨張部５３が形成されている。この非膨張部５３の下端部５３Ａは、非膨張部３９の上端部３９Ａと略同じ高さまで延設されており、展開完了時のエアバッグ袋体１４の形状を整えるようになっている。具体的には、展開時にエアバッグ袋体１６の後部が、屈曲し、車室内側への突出量が増加するのを非膨張部３９によって抑制している。
【００１８】
図３に示される如く、エアバッグ袋体１６の上側周縁部１６Ａには、前後方向に所定の間隔で、取付部１６Ｂが形成されており、エアバッグ袋体１６は、これらの取付部１６Ｂにおいて、Ａピラー２０、ルーフサイドレール５６、Ｃピラー５７に固定されている。
【００１９】
図４に示される如く、エアバッグ袋体１６は、所定の折り畳み方で折り畳まれて長尺状にされた状態で格納されており、折り畳まれたエアバッグ袋体１６の中間部は、ルーフサイドレール部を構成するルーフヘッドライニング６４内に格納されている。従って、エアバッグ袋体１６の中間部においては、エアバッグ袋体展開時に、図４に二点鎖線で示される様に、エアバッグ袋体１６がルーフヘッドライニング６４を押し開いて車室内に展開するようになっている。なお、図４において符号７４はルーフパネルを示している。
【００２０】
図３に示される如く、エアバッグ袋体１６の中間部から後部が格納された部位の上方には、後席用エアコンのダクト７０が略車両前後方向に沿って配設されている。このダクト７０は、ルーフサイドレール５６に沿って車両後方から前方へ向けて延設されており、ダクト７０の先端は、後席用エアコン吹出し口７２に連結されている。この後席用エアコン吹出し口７２の配設位置は、後席着座乗員３６の頭部３６Ａより車両前方となる部位に配設されており、後席着座乗員３６の頭部３６Ａに対して斜め前方から送風できるようになっている。
【００２１】
図５に示される如く、後席用エアコン吹出し口７２は、ルーフヘッドライニング６４に形成された取付孔７４に嵌合されている。また、後席用エアコン吹出し口７２が配設された部位では、ルーフサイドレール５６のインナパネル５６Ａとルーフヘッドライニング６４との間に車両前後方向に伸びる空間７６が形成されており、この空間７６内にエアバッグ袋体１６が格納されている。
【００２２】
図１に示される如く、エアバッグ袋体１６の前席用膨張室４６と後席用膨張室４８との間の中間部には、下方から略矩形状の切欠き８０が形成されており、この切欠き８０には中間部形成部材としての薄布８２が配設されている。
【００２３】
図２（Ａ）に示される如く、エアバッグ袋体１６が袋織りで構成されている場合、または、図２（Ｂ）に示される如く、エアバッグ袋体１６が基布１７の周囲を縫合糸１９による縫合、または接着等によって結合して袋状に形成した場合においても、薄布８２の外周部８２Ａは、切欠き８０の外周部８０Ａの車室外側面にそれぞれ縫合糸８１による縫合、または接着等によって固定されている。
【００２４】
具体的には、図１に示される如く、薄布８２の外周部８２Ａとしての前縁部、後縁部及び上縁部が、切欠き８０の外周部８０Ａの車室外側面にそれぞれ縫合されている。なお、薄布８２には、エアバッグ袋体展開時のガス圧は作用しないため、エアバッグ袋体１６の基布１７程の強度は必要とせず、その分薄い薄布８２が使用可能である。
【００２５】
従って、薄布８２で構成されたエアバッグ袋体１６の中間部は、折り畳み状態での体積が、同面積の基布１７を折り畳み状態とした場合の体積に比べ小さくなる。この結果、図５に示される如く、後席用エアコン吹出し口７２の下方に形成された比較的小さい空間７６内に、エアバッグ袋体１６の中間部を容易に格納することができるようになっている。
【００２６】
次に、本実施形態の作用を説明する。
【００２７】
本実施形態の前後席用頭部保護エアバッグ装置１０では、エアバッグ袋体１６の前席用膨張室４６と後席用膨張室４８との間の中間部を薄布８２で構成したため、エアバッグ袋体１６を折り畳んだ状態では、薄布８２で構成したエアバッグ袋体１６の中間部の体積が、薄布８２と同面積のエアバッグ袋体１６の基布１７の折り畳んだ状態での体積、言い換えれば、切欠き８０を形成しない状態でのエアバッグ袋体１６の中間部の折り畳んだ状態での体積より小さくなる。
【００２８】
この結果、エアバッグ袋体１６の中間部を格納する部位に、後席用エアコン吹出し口７２が存在する場合においても、折り畳んだエアバッグ袋体１６の中間部を後席用エアコン吹出し口７２の下方に形成された比較的小さい空間７６内に格納できるため、エアバッグ袋体１６の格納性能を満足できる。また、エアバッグ袋体１６の格納スペースをむりに広げる必要が無いため、後席用エアコン吹出し口７２を所望の位置へ配設できる。即ち、後席用エアコン吹出し口７２の設計自由度を上げることができる。
【００２９】
また、本実施形態では、図１に示される如く、薄布８２の下端縁部８２Ｂが、テンションライン形成部となっており、この下端縁部８２Ｂによって、前席用膨張室４６の下端部４６Ａと後席用膨張室４８の下端部４８Ａとが連結され、エアバッグ袋体１６の下部を前後方向に沿って延びるテンションラインが形成されるため、エアバッグ袋体１６の乗員支持効果が確保される。
【００３０】
次に、本発明の前後席用頭部保護エアバッグ装置の第２実施形態を図６及び図７に従って説明する。
【００３１】
なお、第１実施形態と同一部材に付いては、同一符号を付してその説明を省略する。
【００３２】
図６に示される如く、本実施形態では、エアバッグ袋体１６の前席用膨張室４６と後席用膨張室４８との間の中間部には、略矩形状の孔８４が形成されており、前席用膨張室４６の下端部４６Ａと後席用膨張室４８の下端部４８Ａとが、前後方向に延びるテンションライン形成部１６Ｃで連結されている。また、孔８４は薄布８６で閉塞されており、この薄布８６とテンションライン形成部１６Ｃとで中間部形成部材を構成している。
【００３３】
図７（Ａ）に示される如く、エアバッグ袋体１６が袋織りで構成されている場合、または、図７（Ｂ）に示される如く、エアバッグ袋体１６が基布の周囲を縫合、接着等によって結合して袋状に形成した場合においても、薄布８６の外周部８６Ａは、孔８４の外周部８４Ａにそれぞれ縫合、接着等によって固定されている。なお、薄布８６には、エアバッグ袋体展開時のガス圧は作用しないため、エアバッグ袋体１６の基布程の強度は必要とせず、その分薄い布材が使用可能である。
【００３４】
従って、本実施形態においても、第１実施形態と同様に、薄布８６で構成されたエアバッグ袋体１６の中間部は、折り畳み状態での体積が、同面積の基布１７を折り畳み状態とした場合の体積に比べ小さくなる。この結果、図５に示される如く、後席用エアコン吹出し口７２の下方に形成された比較的小さい空間７６内に、エアバッグ袋体１６の中間部を容易に格納することができると共に後席用エアコン吹出し口７２の設計自由度を上げることができる。
【００３５】
また、本実施形態においては、エアバッグ袋体展開時には、薄布８６より厚く、強度が高い基布１７から成るテンションライン形成部１６Ｃにより、前席用膨張室４６の下端部４６Ａと後席用膨張室４８の下端部４８Ａとが連結され、エアバッグ袋体１６の下部を前後方向に沿って延びるテンションラインが形成される。このため、エアバッグ袋体１６の乗員支持効果がより確実なものとなる。
次に、本発明の前後席用頭部保護エアバッグ装置の第３実施形態を図８及び図９に従って説明する。
【００３６】
なお、第１実施形態と同一部材に付いては、同一符号を付してその説明を省略する。
【００３７】
図８に示される如く、本実施形態では、エアバッグ袋体１６の前席用膨張室４６と後席用膨張室４８との間の中間部には、略矩形状の孔８８が形成されており、前席用膨張室４６の下端部４６Ａと後席用膨張室４８の下端部４８Ａとが、前後方向に延びるテンションライン形成部１６Ｃで連結されている。このテンションライン形成部１６Ｃには、ガス導通路９２が形成されており、このガス導通路９２を通してもインフレータからのガスが後席用膨張室４８へ供給されるようになっている。また、孔８８は薄布９０で閉塞されており、この薄布９０とテンションライン形成部１６Ｃとで中間部形成部材を構成している。
【００３８】
図９（Ａ）に示される如く、エアバッグ袋体１６が袋織りで構成されている場合、または、図９（Ｂ）に示される如く、エアバッグ袋体１６が基布の周囲を接着、縫合等によって結合して袋状に形成した場合においても、薄布９０の外周部９０Ａは、切欠き８８の外周部８８Ａにそれぞれ縫合、接着等によって固定されている。なお、薄布９０には、エアバッグ袋体展開時のガス圧は作用しないため、エアバッグ袋体１６の基布程の強度は必要とせず、その分薄い布材が使用可能である。
【００３９】
従って、本実施形態においても、第１実施形態と同様に薄布９０で構成されたエアバッグ袋体１６の中間部は、折り畳み状態での体積が、同面積の基布１７を折り畳み状態とした場合の体積に比べ小さくなる。この結果、図５に示される如く、後席用エアコン吹出し口７２の下方に形成された比較的小さい空間７６内に、エアバッグ袋体１６の中間部を容易に格納することができると共に後席用エアコン吹出し口７２の設計自由度を上げることができる。
【００４０】
また、本実施形態においては、エアバッグ袋体展開時には、薄布９０より厚く、強度が高い基布１７から成るテンションライン形成部１６Ｃにより、前席用膨張室４６の下端部４６Ａと後席用膨張室４８の下端部４８Ａとが連結され、エアバッグ袋体１６の下部を前後方向に沿って延びるテンションラインが形成される。このため、エアバッグ袋体１６の乗員支持効果がより確実なものとなる。
さらに、本実施形態においては、エアバッグ袋体展開時にテンションライン形成部１６Ｃに形成されたガス導通路９２を通してもインフレータからのガスが後席用膨張室４８へ供給されるため、後席用膨張室４８の展開が迅速に行われる。
【００４１】
以上に於いては、本発明を特定の実施形態について詳細に説明したが、本発明はかかる実施形態に限定されるものではなく、本発明の範囲内にて他の種々の実施形態が可能であることは当業者にとって明らかである。例えば、上記各実施形態では、中間部形成部材としての薄布８２、８６、９０を使用したが、薄布に代えて、網等の他の中間部形成部材を使用しても良い。
【００４２】
また、上記各実施形態では、エアバッグ袋体１６の前席用膨張室４６と後席用膨張室４８との間の中間部に切欠き８０、孔８６、孔８８を形成し、これらに中間部形成部材としての薄布８２、８６、９０を配設したが、これに代えて、エアバッグ袋体１６の前席用膨張室４６と後席用膨張室４８との間の中間部（切欠き８０、孔８６、孔８８を形成する部位）に、中間部形成部材として、基布１７にコーティング材の塗布を行わない部位を形成することで、エアバッグ袋体１６の中間部の折り畳み状態での体積が、同面積のコーティング材の塗布を行った基布を折り畳み状態とした場合の体積に比べ小さくなる構成としても良い。また、エアバッグ袋体１６の前席用膨張室４６と後席用膨張室４８との間の中間部に、中間部形成部材として、複数の小孔を穿設した部位を形成することで、エアバッグ袋体１６の中間部の折り畳み状態での体積が、小孔を穿設しない基布を折り畳み状態とした場合の体積に比べ小さくなる構成としても良い。
【００４３】
また、上記各実施形態では、薄布８２、８６、９０の外周部８２Ａ、８６Ａ、９０Ａを、切欠き８０、孔８６、８８の外周部８０Ａ、８６Ａ、８８Ａの車室外側面にそれぞれ固定した構成としたが、これに代えて、薄布８２、８６、９０の外周部８２Ａ、８６Ａ、９０Ａを、切欠き８０、孔８６、８８の外周部８０Ａ、８６Ａ、８８Ａの車室内側面にそれぞれ固定した構成としても良い。
【００４４】
また、上記第２実施形態において、薄布８６を除き、中間部形成部材をテンションライン形成部１６Ｃのみとした構成としても良い。同様に上記第３実施形態において、薄布９０を除き、中間部形成部材をテンションライン形成部１６Ｃのみとした構成としても良い。
【００４５】
また、上記各実施形態では、ルーフサイドレール５６に形成された後席用エアコン吹出し口７２に対して本発明を適用した実施形態について説明したが、本発明の前後席用頭部保護エアバッグ装置は、ルーフサイドレール５６に配設されたアシストグリップ、ランプ等に対しても適用可能である。
【００４６】
また、本実施形態では、フロントピラー（Ａピラー）側にインフレータを配設した前後席用頭部保護エアバッグ装置に付いて説明したが、本発明は、クォータピラー（Ｃピラー）側にインフレータを配設した前後席用頭部保護エアバッグ装置にも適用可能である。
【００４７】
【発明の効果】
以上説明した如く、請求項１記載の本発明の前後席用頭部保護エアバッグ装置は、エアバッグ袋体の格納性能を満足した上で後席用エアコン吹出し口の設計自由度を上げることができるという優れた効果を有する。
【００４８】
また、請求項２記載の本発明の前後席用頭部保護エアバッグ装置は、請求項１記載の効果に加えて、エアバッグ袋体の乗員支持効果がより確実なものとなるという優れた効果を有する。
また、請求項３記載の本発明の前後席用頭部保護エアバッグ装置は、エアバッグ袋体の格納性能を満足した上で後席用エアコン吹出し口の設計自由度を上げることができるという優れた効果を有する。
また、請求項４記載の本発明の前後席用頭部保護エアバッグ装置は、請求項３記載の効果に加えて、エアバッグ袋体の乗員支持効果がより確実なものとなるという優れた効果を有する。
また、請求項５記載の本発明の前後席用頭部保護エアバッグ装置は、エアバッグ袋体の格納性能を満足した上で後席用エアコン吹出し口の設計自由度を上げることができるという優れた効果を有する。
また、請求項６記載の本発明の前後席用頭部保護エアバッグ装置は、請求項５記載の効果に加えて、エアバッグ袋体の乗員支持効果がより確実なものとなるという優れた効果を有する。
【図面の簡単な説明】
【図１】本発明の第１実施形態に係る前後席用頭部保護エアバッグ装置におけるエアバッグ袋体の展開状態を示す概略側面図である。
【図２】（Ａ）はエアバッグ袋体が袋織りで構成されている場合を示す図１の２−２線に沿った拡大断面図であり、（Ｂ）はエアバッグ袋体が基布の周囲を結合して袋状とした場合を示す図１の２−２線に沿った拡大断面図である。
【図３】本発明の第１実施形態に係る前後席用頭部保護エアバッグ装置を示す概略側面図である。
【図４】図３の４−４線に沿った拡大断面図である。
【図５】図３の５−５線に沿った拡大断面図である。
【図６】本発明の第２実施形態に係る前後席用頭部保護エアバッグ装置におけるエアバッグ袋体の展開状態を示す概略側面図である。
【図７】（Ａ）はエアバッグ袋体が袋織りで構成されている場合を示す図６の７−７線に沿った拡大断面図であり、（Ｂ）はエアバッグ袋体が基布の周囲を結合して袋状とした場合を示す図６の７−７線に沿った拡大断面図である。
【図８】本発明の第３実施形態に係る前後席用頭部保護エアバッグ装置におけるエアバッグ袋体の展開状態を示す概略側面図である。
【図９】（Ａ）はエアバッグ袋体が袋織りで構成されている場合を示す図８の９−９線に沿った拡大断面図であり、（Ｂ）はエアバッグ袋体が基布の周囲を結合して袋状とした場合を示す図８の９−９線に沿った拡大断面図である。
【図１０】従来の実施形態に係る頭部保護エアバッグ装置におけるエアバッグ袋体の展開完了状態を示す概略側面図である。
【符号の説明】
１０前後席用頭部保護エアバッグ装置
１４インフレータ
１６エアバッグ袋体
１６Ｃエアバッグ袋体のテンションライン形成部（中間部形成部材）
２０Ａピラー（フロントピラー）
３４前席着座乗員
３６後席着座乗員
４０前席用膨張室（前席乗員頭部保護用膨張部）
４２前席用膨張室（前席乗員頭部保護用膨張部）
４４前席用膨張室（前席乗員頭部保護用膨張部）
４６前席用膨張室（前席乗員頭部保護用膨張部）
４８後席用膨張室（後席乗員頭部保護用膨張部）
５０後席用膨張室（後席乗員頭部保護用膨張部）
５１後席用膨張室（後席乗員頭部保護用膨張部）
７０後席用エアコンのダクト
７２後席用エアコン吹出し口
８０切欠き
８２薄布（中間部形成部材）
８２Ｂ薄布の下端縁部（テンションライン形成部）
８４孔
８６薄布（中間部形成部材）
８８孔
９０薄布（中間部形成部材）
９２ガス導通路[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to a head protection airbag in which gas is ejected from an inflator when a predetermined high load is applied to a vehicle body side portion, and the gas inflates the airbag bag body from the pillar portion along the roof side rail portion in a curtain shape. Equipment related.
[0002]
[Prior art]
In order to improve the protection performance of the head of the occupant sitting on the front seat when a predetermined high load is applied to the side of the vehicle body, the airbag is stored in a folded state over the front pillar portion and the roof side rail portion. An occupant protection device that expands the bag body in a curtain shape along the side window glass has already been proposed. Hereinafter, a configuration disclosed in WO 96/26087 which discloses this type of occupant protection device will be described.
[0003]
As shown in FIG. 10, the occupant protection device 100 is an elongated member that is disposed so as to extend from a front pillar (A pillar) 102 through a roof side rail 104 to a quarter pillar (C pillar) 105. Of the duct 106 via a hose 114, an airbag bag body 112 stored in a folded state in the duct 106 and fixed to the vehicle body at a front end fixing point 108 and a rear end fixing point 110. An inflator 116 connected to the intermediate portion and ejecting gas when a predetermined high load is applied to the vehicle body side portion is configured as a main component. Further, the airbag body 112 is formed by connecting a plurality of cells 120 each formed in a substantially cylindrical shape and arranged with the vehicle vertical direction as a longitudinal direction.
[0004]
According to the above configuration, when a predetermined high load acts on the vehicle body side, gas is blown from the inflator 116. Therefore, the ejected gas flows into each cell 120 of the folded airbag body 112 via the hose 114 and the duct 106. As a result, each cell 120 expands in a substantially cylindrical shape with the vehicle vertical direction as the longitudinal direction, whereby the airbag bag body 112 expands in a curtain shape along the window glass 122. Further, an intermediate portion of the airbag bag body 112 is arranged inside the upper portion of the center pillar portion 124.
[0005]
[Problems to be solved by the invention]
However, in the head protection airbag device as described above, it is necessary to store the rear portion of the airbag bag body 112 in the roof side rail portion 104 on the side of the rear seat. On the other hand, there is a vehicle in which a rear-seat air-conditioning outlet is set in the roof side rail portion 104 on the side of the rear seat. In such a vehicle, an airbag is provided in a portion avoiding the rear-seat air-conditioning outlet. The rear part of the bag 112 must be stored, and the storage space for the airbag 112 is reduced, and the airbag 112 is difficult to store. Further, in order to secure a storage space for the airbag bag body 112, there may be a case where the air conditioner outlet for the rear seat cannot be arranged at a desired position.
[0006]
An object of the present invention is to provide a head protection airbag device for front and rear seats that can increase the degree of freedom in designing the air conditioner outlet for rear seats while satisfying the storage performance of the airbag bag body in consideration of the above facts. It is.
[0007]
[Means for Solving the Problems]
The present invention according to claim 1 is a head protection airbag device for front and rear seats having an airbag bag body that extends from the A pillar via the roof side rail to the C pillar and develops in a curtain shape,
The airbag bag body constitutes an intermediate portion between the front seat occupant head protection inflation portion and the rear seat occupant head protection inflation portion of the airbag bag body, and has a volume in the folded state and the same area. an intermediate portion forming member is smaller than the base fabric,
A member disposed at a position for storing the intermediate portion forming member in the roof side rail,
It is characterized by having.
[0008]
Therefore, when the airbag body is folded, the volume of the middle part of the airbag body formed by the middle part forming member is smaller than that of the base fabric of the airbag body having the same area as the middle part forming member. Smaller than the volume of As a result, even if a member such as a rear seat air-conditioner outlet and an assist grip is provided in the roof side rail at a position where the middle portion of the airbag bag is stored, the middle portion of the folded airbag bag is small. Since it can be stored in a space, the storage performance of the airbag bag can be satisfied. In addition, since it is not necessary to unnecessarily expand the storage space for the airbag bag, the air conditioner outlet for the rear seat can be disposed at a desired position. That is, the degree of freedom in designing the rear seat air conditioner outlet can be increased.
[0009]
According to a second aspect of the present invention, in the head protection airbag device for the front and rear seats according to the first aspect, the intermediate portion forming member includes at least a lower end portion of the front seat occupant head protection inflating portion and the rear seat occupant. It is characterized by having a tension line forming portion connecting the lower end portion of the head protecting inflating portion.
[0010]
Therefore, in addition to the contents described in claim 1, when the airbag bag is deployed, the lower end of the front seat occupant head protection inflating portion and the lower end of the rear seat occupant head protecting inflating portion are formed by the tension line forming portion. Are connected to each other to form a tension line extending below the airbag body along the front-rear direction. For this reason, the occupant support effect of the airbag bag is further ensured.
The present invention according to claim 3 is a head protection airbag device for front and rear seats having an airbag bag body that extends from the A pillar via the roof side rail to the C pillar and develops in a curtain shape,
The airbag bag body constitutes an intermediate portion between the front seat occupant head protection inflation portion and the rear seat occupant head protection inflation portion of the airbag bag body, and has a volume in the folded state and the same area. small and thin cloth than the base fabric of,
A member disposed at a portion of the roof side rail that stores the thin cloth,
It is characterized by having.
Therefore, when the airbag bag is folded, the volume of the intermediate portion of the airbag bag made of thin cloth is smaller than the volume of the airbag bag with the same area as the thin cloth when the base cloth is folded. Become. As a result, even if a member such as a rear seat air-conditioner outlet and an assist grip is provided in the roof side rail at a position where the middle portion of the airbag bag is stored, the middle portion of the folded airbag bag is small. Since it can be stored in a space, the storage performance of the airbag bag can be satisfied. In addition, since it is not necessary to unnecessarily expand the storage space for the airbag bag, the air conditioner outlet for the rear seat can be disposed at a desired position. That is, the degree of freedom in designing the rear seat air conditioner outlet can be increased.
According to a fourth aspect of the present invention, there is provided the airbag apparatus for protecting the front and rear seats according to the third aspect, wherein the thin cloth includes at least a lower end portion of the inflatable portion for protecting the front seat occupant head and the rear seat occupant head. It is characterized in that it has a tension line forming portion that connects the lower end portion of the protective expansion portion.
Therefore, in addition to the contents described in claim 3, when the airbag bag is deployed, the lower end portion of the front seat occupant head protection inflating portion and the lower end portion of the rear seat occupant head protecting inflating portion are formed by the tension line forming portion. Are connected to each other to form a tension line extending below the airbag body along the front-rear direction. For this reason, the occupant support effect of the airbag bag is further ensured.
The present invention according to claim 5 is a head protection airbag device for front and rear seats having an airbag bag body that extends from the A pillar via the roof side rail to the C pillar and extends in a curtain shape,
The airbag bag body constitutes an intermediate portion between the front seat occupant head protection inflation portion and the rear seat occupant head protection inflation portion of the airbag bag body, and has a volume in the folded state and the same area. and of the base fabric less than the network,
A member disposed at a portion of the roof side rail that stores the net,
It is characterized by having.
Therefore, when the airbag body is folded, the volume of the intermediate portion of the airbag body made of the net is smaller than the volume of the airbag body with the same area as the net when the base fabric is folded. As a result, even if a member such as a rear seat air-conditioner outlet and an assist grip is provided in the roof side rail at a position where the middle portion of the airbag bag is stored, the middle portion of the folded airbag bag is small. Since it can be stored in a space, the storage performance of the airbag bag can be satisfied. In addition, since it is not necessary to unnecessarily expand the storage space for the airbag bag, the air conditioner outlet for the rear seat can be disposed at a desired position. That is, the degree of freedom in designing the rear seat air conditioner outlet can be increased.
According to a sixth aspect of the present invention, in the airbag apparatus for protecting the front and rear seats according to the fifth aspect, the net is at least a lower end portion of the inflatable portion for protecting the head of the front seat and the head of the rear seat. It has a tension line formation part which connects with a lower end part of a use expansion part.
Therefore, in addition to the contents described in claim 5, when the airbag bag is deployed, the lower end of the front seat occupant head protection inflating portion and the lower end of the rear seat occupant head protecting inflating portion are formed by the tension line forming portion. Are connected to each other to form a tension line extending below the airbag body along the front-rear direction. For this reason, the occupant support effect of the airbag bag is further ensured.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of a head protection airbag device for front and rear seats according to the present invention will be described with reference to FIGS.
[0012]
In the drawings, the arrow FR indicates the vehicle forward direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width inside direction.
[0013]
As shown in FIG. 3, the head protection airbag device 10 for front and rear seats includes a sensor 12 for detecting a side collision state, a cylindrical inflator 14 for ejecting gas when activated, and a predetermined folding method. And the airbag bag body 16 folded as a main component. The sensor 12 is disposed near the lower end of the center pillar (B pillar) 18 and detects a side collision state when a side collision load of a predetermined value or more acts on the vehicle body side.
[0014]
The inflator 14 is provided in the vicinity of the connection between the A-pillar (front pillar) 20 and the instrument panel 22, and is connected to the sensor 12 described above. Therefore, when the sensor 12 detects the side collision state, the inflator 14 operates.
[0015]
The airbag bag body 16 is coated with a coating material having an increased tensile strength by mixing fine fibers made of nylon, carbon, or the like into a highly airtight resin, for example, a silicone resin, over the entire outer surface of the base cloth. Have been.
[0016]
The airbag bag body 16 has a curtain shape in an unfolded state shown by a two-dot chain line in FIG. 3, and covers the upper part and the central part of the front side window glass 28, the center pillar 18, and the rear side window glass 30. In addition, the airbag bag body 16 has a front side occupant 34 serving as a front seat occupant head protection inflating portion that is deployed to the side of the head 34A of the front seat occupant 34 and the side of the upper portion of the center pillar 18 in side view. Rear seat expansion chambers 40, 42, 44, 46, and rear seat expansion chambers 48, 50, 51 serving as rear seat occupant head protection expansion sections that are deployed to the sides of the head 36 A of the rear seat occupant 36. It has. The space between the front-seat expansion chambers 40, 42, 44, 46 and the space between the rear-seat expansion chambers 48, 50, 51 extend substantially vertically in the vertical center of the airbag body 16, respectively. A non-expandable portion 39 is formed, and each of the expansion chambers 40, 42, 44, 46, 48, 50, 51 has a substantially cylindrical shape extending substantially vertically. Further, the inflator 14 and each of the inflation chambers 40, 42, 44, 46, 48, 50, 51 are connected by a gas supply passage 52, and the gas supply passage 52 extends along the upper peripheral portion 16 A of the airbag body 16. It is formed.
[0017]
As shown in FIG. 1, a non-inflating portion 53 extending downward from the upper peripheral portion 16 A of the airbag body 16 is formed substantially at the center of the rear inflation chamber 50 in the front-rear direction. The lower end portion 53A of the non-inflating portion 53 extends to substantially the same height as the upper end portion 39A of the non-inflating portion 39, so that the shape of the airbag body 14 when the deployment is completed is adjusted. Specifically, the non-inflating portion 39 suppresses the rear portion of the airbag body 16 from being bent at the time of deployment and increasing the amount of protrusion toward the vehicle interior.
[0018]
As shown in FIG. 3, mounting portions 16B are formed at predetermined intervals in the front-rear direction on the upper peripheral portion 16A of the airbag bag body 16. , A pillar 20, roof side rail 56, and C pillar 57.
[0019]
As shown in FIG. 4, the airbag body 16 is stored in a state of being folded and elongated in a predetermined folding manner, and an intermediate portion of the folded airbag body 16 is a roof side. It is stored in a roof head lining 64 that constitutes a rail portion. Accordingly, in the middle portion of the airbag bag body 16, when the airbag bag body is deployed, the airbag bag body 16 pushes open the roof head lining 64 and deploys in the vehicle cabin, as shown by a two-dot chain line in FIG. It is supposed to. In FIG. 4, reference numeral 74 denotes a roof panel.
[0020]
As shown in FIG. 3, a duct 70 of a rear seat air conditioner is disposed substantially along the vehicle front-rear direction above a portion where the rear portion is stored from the middle portion of the airbag bag body 16. The duct 70 extends from the rear to the front of the vehicle along the roof side rail 56, and the tip of the duct 70 is connected to the rear seat air-conditioner outlet 72. The rear-seat air conditioner outlet 72 is disposed at a position forward of the head 36A of the rear seated occupant 36 and obliquely forward with respect to the head 36A of the rear seated occupant 36. It can be blown from.
[0021]
As shown in FIG. 5, the rear seat air conditioner outlet 72 is fitted into a mounting hole 74 formed in the roof head lining 64. In the area where the rear seat air-conditioner outlet 72 is provided, a space 76 extending in the vehicle front-rear direction is formed between the inner panel 56A of the roof side rail 56 and the roof head lining 64. An airbag bag 16 is stored therein.
[0022]
As shown in FIG. 1, a substantially rectangular notch 80 is formed from below in an intermediate portion between the front-seat inflation chamber 46 and the rear-seat inflation chamber 48 of the airbag bag body 16. The notch 80 is provided with a thin cloth 82 as an intermediate portion forming member.
[0023]
As shown in FIG. 2 (A), when the airbag bag 16 is made of a bag weave, or as shown in FIG. 2 (B), the airbag bag 16 stitches around the base cloth 17. Even in the case where the outer peripheral portion 82A of the thin cloth 82 is stitched to the outer surface of the outer peripheral portion 80A of the notch 80 with the suture thread 81, It is fixed by bonding or the like.
[0024]
Specifically, as shown in FIG. 1, a front edge, a rear edge, and an upper edge serving as an outer peripheral portion 82 A of the thin cloth 82 are respectively sewn to the vehicle exterior surface of the outer peripheral portion 80 A of the notch 80. I have. In addition, since the gas pressure at the time of deployment of the airbag body does not act on the thin cloth 82, the strength of the base cloth 17 of the airbag body 16 is not required, and the thin cloth 82 can be used accordingly. .
[0025]
Therefore, the volume of the intermediate portion of the airbag bag body 16 formed of the thin cloth 82 in the folded state is smaller than the volume in the case where the base cloth 17 having the same area is folded. As a result, as shown in FIG. 5, the intermediate portion of the airbag body 16 can be easily stored in a relatively small space 76 formed below the rear air conditioner outlet 72. ing.
[0026]
Next, the operation of the present embodiment will be described.
[0027]
In the head protection airbag device 10 for the front and rear seats of the present embodiment, since the intermediate portion between the front seat inflation chamber 46 and the rear seat inflation chamber 48 of the airbag bag body 16 is made of the thin cloth 82, the air When the bag bag body 16 is folded, the volume of the intermediate portion of the airbag bag body 16 formed of the thin cloth 82 is smaller than that of the base cloth 17 of the airbag bag body 16 having the same area as the thin cloth 82. It is smaller than the volume, in other words, the volume of the middle portion of the airbag bag body 16 in a state where the notch 80 is not formed and in a folded state.
[0028]
As a result, even when the air conditioner outlet 72 for the rear seat is present at the location where the intermediate portion of the airbag bag 16 is stored, the intermediate portion of the folded airbag 16 is connected to the air conditioner outlet 72 for the rear seat. Since it can be stored in a relatively small space 76 formed below, the storage performance of the airbag body 16 can be satisfied. Further, since it is not necessary to unnecessarily expand the storage space of the airbag bag body 16, the rear seat air-conditioner outlet 72 can be disposed at a desired position. In other words, the degree of freedom in designing the rear seat air conditioner outlet 72 can be increased.
[0029]
In the present embodiment, as shown in FIG. 1, the lower end edge 82B of the thin cloth 82 is a tension line forming portion, and the lower end edge 82B makes the lower end 46A of the front seat expansion chamber 46 a. And the lower end portion 48A of the rear seat inflation chamber 48 are connected to form a tension line extending along the lower part of the airbag bag body 16 in the front-rear direction, so that the occupant support effect of the airbag bag body 16 is ensured. You.
[0030]
Next, a second embodiment of the head protection airbag device for front and rear seats of the present invention will be described with reference to FIGS.
[0031]
The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0032]
As shown in FIG. 6, in the present embodiment, a substantially rectangular hole 84 is formed in an intermediate portion between the front seat expansion chamber 46 and the rear seat expansion chamber 48 of the airbag bag 16. The lower end portion 46A of the front seat expansion chamber 46 and the lower end portion 48A of the rear seat expansion chamber 48 are connected by a tension line forming portion 16C extending in the front-rear direction. The hole 84 is closed by a thin cloth 86, and the thin cloth 86 and the tension line forming part 16C constitute an intermediate portion forming member.
[0033]
As shown in FIG. 7 (A), when the airbag bag body 16 is made of a bag weave, or as shown in FIG. 7 (B), the airbag bag body 16 is sewn around the base cloth. Even when formed into a bag shape by bonding with an adhesive or the like, the outer peripheral portion 86A of the thin cloth 86 is fixed to the outer peripheral portion 84A of the hole 84 by sewing or bonding, respectively. In addition, since the gas pressure when the airbag body is deployed does not act on the thin cloth 86, the thin cloth 86 does not need to have the same strength as the base cloth of the airbag body 16, and a thinner cloth material can be used.
[0034]
Therefore, also in the present embodiment, as in the first embodiment, the intermediate portion of the airbag bag body 16 formed of the thin cloth 86 has a volume in the folded state, which is the same as that in the folded state. It becomes smaller than the volume when it is done. As a result, as shown in FIG. 5, the intermediate portion of the airbag bag body 16 can be easily stored in a relatively small space 76 formed below the air conditioner outlet 72 for the rear seat and the rear seat. The degree of freedom of design of the air conditioner outlet 72 can be increased.
[0035]
In the present embodiment, when the airbag bag is deployed, the lower end 46A of the front seat inflation chamber 46 and the lower seat 46A for the rear seat are formed by the tension line forming portion 16C made of the base cloth 17 thicker and stronger than the thin cloth 86. A lower end portion 48A of the inflation chamber 48 is connected to form a tension line extending below the airbag bag body 16 in the front-rear direction. For this reason, the occupant support effect of the airbag bag body 16 becomes more reliable.
Next, a third embodiment of the head protection airbag device for front and rear seats of the present invention will be described with reference to FIGS.
[0036]
The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0037]
As shown in FIG. 8, in the present embodiment, a substantially rectangular hole 88 is formed in an intermediate portion of the airbag body 16 between the front seat expansion chamber 46 and the rear seat expansion chamber 48. The lower end portion 46A of the front seat expansion chamber 46 and the lower end portion 48A of the rear seat expansion chamber 48 are connected by a tension line forming portion 16C extending in the front-rear direction. A gas conducting path 92 is formed in the tension line forming section 16C, and gas from the inflator is supplied to the rear seat expansion chamber 48 also through the gas conducting path 92. The hole 88 is closed by a thin cloth 90, and the thin cloth 90 and the tension line forming portion 16C constitute an intermediate portion forming member.
[0038]
As shown in FIG. 9 (A), when the airbag bag 16 is made of a bag weave, or as shown in FIG. 9 (B), the airbag bag 16 adheres around the base cloth. Even when formed into a bag shape by being joined by sewing or the like, the outer peripheral portion 90A of the thin cloth 90 is fixed to the outer peripheral portion 88A of the notch 88 by sewing or bonding, respectively. In addition, since the gas pressure at the time of deployment of the airbag body does not act on the thin cloth 90, the strength of the base cloth of the airbag body 16 is not required, and a thinner cloth material can be used.
[0039]
Therefore, also in the present embodiment, as in the first embodiment, the intermediate portion of the airbag bag body 16 composed of the thin cloth 90 has a volume in the folded state, and the base cloth 17 having the same area is in the folded state. It is smaller than the volume of the case. As a result, as shown in FIG. 5, the intermediate portion of the airbag bag body 16 can be easily stored in a relatively small space 76 formed below the air conditioner outlet 72 for the rear seat and the rear seat. The degree of freedom of design of the air conditioner outlet 72 can be increased.
[0040]
In the present embodiment, when the airbag bag is deployed, the lower end portion 46A of the front-seat inflation chamber 46 and the rear-seat rear-seat portion 46C are formed by the tension line forming portion 16C made of the base fabric 17 which is thicker and stronger than the thin fabric 90. A lower end portion 48A of the inflation chamber 48 is connected to form a tension line extending below the airbag bag body 16 in the front-rear direction. For this reason, the occupant support effect of the airbag bag body 16 becomes more reliable.
Further, in the present embodiment, the gas from the inflator is supplied to the rear-seat inflation chamber 48 also through the gas conducting path 92 formed in the tension line forming portion 16C when the airbag bag is deployed, so that the rear-seat inflation is performed. The deployment of the chamber 48 is performed quickly.
[0041]
In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to such an embodiment, and various other embodiments are possible within the scope of the present invention. Some will be apparent to those skilled in the art. For example, although the thin cloths 82, 86, and 90 are used as the intermediate part forming members in the above embodiments, other intermediate part forming members such as nets may be used instead of the thin cloths.
[0042]
In each of the above embodiments, the notch 80, the hole 86, and the hole 88 are formed at an intermediate portion between the front-seat inflation chamber 46 and the rear-seat inflation chamber 48 of the airbag bag body 16, and the intermediate portion is formed therebetween. The thin cloths 82, 86, and 90 as the portion forming members are provided, but instead, an intermediate portion (cut) between the front-seat inflation chamber 46 and the rear-seat inflation chamber 48 of the airbag bag body 16 is provided. By forming a part where the coating material is not applied to the base cloth 17 as an intermediate part forming member at the part where the notch 80, the hole 86 and the hole 88 are formed, the intermediate part of the airbag body 16 is folded. May be smaller than the volume when the base cloth coated with the same area of the coating material is folded. Further, by forming a portion having a plurality of small holes as an intermediate portion forming member in an intermediate portion between the front seat expansion chamber 46 and the rear seat expansion chamber 48 of the airbag bag body 16, The configuration may be such that the volume of the intermediate portion of the airbag bag body 16 in the folded state is smaller than the volume of the base fabric in which no small holes are formed in the folded state.
[0043]
In each of the above embodiments, the outer peripheral portions 82A, 86A, 90A of the thin cloths 82, 86, 90 are fixed to the outer surfaces of the notches 80, the outer peripheral portions 80A, 86A, 88A of the holes 86, 88, respectively. Instead, the outer peripheral portions 82A, 86A, 90A of the thin cloths 82, 86, 90 are fixed to the notch 80, the outer peripheral portions 80A, 86A, 88A of the holes 86, 88, respectively, on the vehicle interior side surfaces. It is good also as composition.
[0044]
Further, in the second embodiment, the intermediate portion forming member may be configured to include only the tension line forming portion 16C except for the thin cloth 86. Similarly, in the third embodiment, the intermediate portion forming member may be configured to include only the tension line forming portion 16C except for the thin cloth 90.
[0045]
Further, in each of the above embodiments, the embodiment in which the present invention is applied to the rear-seat air conditioner outlet 72 formed on the roof side rail 56 has been described. Is also applicable to an assist grip, a lamp, and the like provided on the roof side rail 56.
[0046]
Also, in the present embodiment, the head protection airbag device for front and rear seats in which an inflator is disposed on the front pillar (A pillar) side has been described. However, the present invention provides an inflator on the quarter pillar (C pillar) side. The present invention is also applicable to the front and rear seat head protection airbag devices provided.
[0047]
【The invention's effect】
As described above, the front and rear seat head protection airbag device according to the first aspect of the present invention can increase the degree of freedom in designing the rear air conditioner outlet while satisfying the storage performance of the airbag bag. It has an excellent effect of being able to.
[0048]
The head protection airbag device for front and rear seats according to the second aspect of the present invention has an excellent effect that the occupant support effect of the airbag body is more reliable in addition to the effect of the first aspect. Having.
Further, the head protection airbag device for front and rear seats according to the third aspect of the present invention is excellent in that the degree of freedom in designing the air conditioner outlet for the rear seat can be increased while satisfying the storage performance of the airbag bag. Has the effect.
According to the fourth aspect of the present invention, in addition to the effects of the third aspect, the head protection airbag device for front and rear seats has an excellent effect that the occupant support effect of the airbag body is more reliable. Having.
The head protection airbag device for the front and rear seats according to the fifth aspect of the present invention is excellent in that the degree of freedom in designing the rear air conditioner outlet can be increased while satisfying the storage performance of the airbag bag. Has the effect.
According to the sixth aspect of the present invention, in addition to the effect of the fifth aspect, in addition to the effect of the fifth aspect, an excellent effect that the occupant support effect of the airbag body is further ensured. Having.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an expanded state of an airbag body in a head protection airbag device for front and rear seats according to a first embodiment of the present invention.
FIG. 2A is an enlarged cross-sectional view taken along line 2-2 of FIG. 1 showing a case where the airbag bag is formed of a bag weave, and FIG. FIG. 2 is an enlarged cross-sectional view taken along line 2-2 of FIG.
FIG. 3 is a schematic side view showing a head protection airbag device for front and rear seats according to the first embodiment of the present invention.
FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 3;
FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. 3;
FIG. 6 is a schematic side view showing a deployed state of an airbag body in a head protection airbag device for front and rear seats according to a second embodiment of the present invention.
7A is an enlarged cross-sectional view taken along line 7-7 in FIG. 6 showing a case where the airbag body is made of a bag weave, and FIG. 7 is an enlarged cross-sectional view taken along line 7-7 in FIG.
FIG. 8 is a schematic side view showing an expanded state of an airbag body in a head protection airbag device for front and rear seats according to a third embodiment of the present invention.
9A is an enlarged cross-sectional view taken along line 9-9 of FIG. 8 showing a case where the airbag bag is formed of a bag weave, and FIG. 9 is an enlarged cross-sectional view taken along line 9-9 of FIG.
FIG. 10 is a schematic side view showing a completed deployment state of an airbag body in a head protection airbag device according to a conventional embodiment.
[Explanation of symbols]
10 Front and rear seat head protection airbag device 14 Inflator 16 Airbag bag 16C Tension line forming portion (intermediate portion forming member) of airbag bag
20 A pillar (front pillar)
34 Front seat occupant 36 Rear seat occupant 40 Front seat expansion chamber (front seat occupant head protection expansion section)
42 Front seat expansion chamber (front seat occupant head protection expansion section)
44 Front seat expansion chamber (front seat occupant head protection expansion section)
46 Front seat expansion chamber (front seat occupant head protection expansion section)
48 Rear-seat expansion chamber (rear-seat occupant head protection expansion section)
50 Rear-seat inflation chamber (rear-seat occupant head protection inflation section)
51 Rear-seat inflation chamber (rear-seat occupant head protection inflation section)
70 Rear-seat air-conditioner duct 72 Rear-seat air-conditioner outlet 80 Notch 82 Thin cloth (intermediate part forming member)
82B Lower edge of thin cloth (tension line forming part)
84 hole 86 thin cloth (intermediate part forming member)
88 hole 90 thin cloth (intermediate part forming member)
92 Gas channel

Claims

In a head protection airbag device for front and rear seats having an airbag bag body which extends from the A pillar via the roof side rail to the C pillar and extends in a curtain shape,
The airbag bag body constitutes an intermediate portion between the front seat occupant head protection inflation portion and the rear seat occupant head protection inflation portion of the airbag bag body, and has a volume in the folded state and the same area. an intermediate portion forming member is smaller than the base fabric,
A member disposed at a position for storing the intermediate portion forming member in the roof side rail,
A head protection airbag device for front and rear seats, comprising:

The intermediate portion forming member has at least a tension line forming portion that connects a lower end portion of the front seat occupant head protection inflating portion and a lower end portion of the rear seat occupant head protecting inflating portion. Item 2. A head protection airbag device for front and rear seats according to Item 1.

In a head protection airbag device for front and rear seats having an airbag bag body which extends from the A pillar via the roof side rail to the C pillar and extends in a curtain shape,
The airbag bag body constitutes an intermediate portion between the front seat occupant head protection inflation portion and the rear seat occupant head protection inflation portion of the airbag bag body, and has a volume in the folded state and the same area. small and thin cloth than the base fabric of,
A member disposed at a portion of the roof side rail that stores the thin cloth,
A head protection airbag device for front and rear seats, comprising:

4. The thin cloth having a tension line forming portion connecting at least a lower end portion of the front seat occupant head protection inflating portion and a lower end portion of the rear seat occupant head protecting inflating portion. The head protection airbag device for the front and rear seats described in the above.

In a head protection airbag device for front and rear seats having an airbag bag body which extends from the A pillar via the roof side rail to the C pillar and extends in a curtain shape,
The airbag bag body constitutes an intermediate portion between the front seat occupant head protection inflation portion and the rear seat occupant head protection inflation portion of the airbag bag body, and has a volume in the folded state and the same area. and of the base fabric less than the network,
A member disposed at a portion of the roof side rail that stores the net,
A head protection airbag device for front and rear seats, comprising:

6. The net according to claim 5, wherein the net has a tension line forming portion connecting at least a lower end portion of the front seat occupant head protection inflating portion and a lower end portion of the rear seat occupant head protecting inflating portion. Head protection airbag device for front and rear seats.