JP3867537B2

JP3867537B2 - Airbag device

Info

Publication number: JP3867537B2
Application number: JP2001301630A
Authority: JP
Inventors: 孝典神頭; 聡馬渕
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2001-09-28
Filing date: 2001-09-28
Publication date: 2007-01-10
Anticipated expiration: 2021-09-28
Also published as: JP2003104155A

Description

【０００１】
【発明の属する技術分野】
本発明は、折り畳まれたエアバッグと、エアバッグに膨張用ガスを供給するインフレーターと、を備えて構成されるエアバッグ組付体の周囲が、エアバッグの折り崩れを防止可能としてエアバッグの展開膨張時に破断可能なラッピング材に覆われて、車両に搭載される構成のエアバッグ装置に関する。
【０００２】
【従来の技術とその課題】
従来、上記構成のエアバッグ装置としては、例えば、特開２００１−１５１０６４に示す構成のものがあった。
【０００３】
このエアバッグ装置は、長尺状のラッピング材の一端を、蛇腹状に折り畳まれたエアバッグの折り目の間に挿入させて固定し、ラッピング材をエアバッグ組付体に巻き付けるようにして、他端を、エアバッグ組付体から突出しているインフレーターの取付ボルトに係止させて、エアバッグ組付体の周囲をラッピング材で覆う構成であった。
【０００４】
しかし、上記構成のエアバッグ装置では、ラッピング材の一端をエアバッグの折り目の間に挿入させて固定させなければならず、エアバッグ組付体のラッピング作業に手間がかかっていた。また、ラッピング材の幅方向の両端が開口とされていることから、エアバッグ組付体に強い衝撃が加わった場合、エアバッグの折り崩れが生じる虞れがあった。そして、ラッピング材の開口部分から、異物が混入する虞れもあった。
【０００５】
本発明は、上述の課題を解決するものであり、ラッピング作業が容易で、エアバッグの全周を的確に覆うことができるラッピング材を備えたエアバッグ装置を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明に係るエアバッグ装置は、折り畳まれたエアバッグと、エアバッグに膨張用ガスを供給するインフレーターと、を備えて構成されるエアバッグ組付体の周囲が、エアバッグの折り崩れを防止可能としてエアバッグの展開膨張時に破断可能なラッピング材に覆われて、車両に搭載される構成のエアバッグ装置において、
ラッピング材が、相互に熱溶着可能で、難燃性を有したシート材から形成され、
エアバッグ組付体が、ラッピング材を熱溶着させて形成されたラッピング袋により、略全周を覆われて、車両に搭載され、
インフレーターが、
膨張用ガスを供給可能な本体と、
本体から突出して配設されて、エアバッグ組付体を車両に取付固定するための取付ボルトと、
を備える構成として、
ラッピング袋のシート材が、幅寸法を、エアバッグ組付体の幅寸法より大きく、かつ、長さ寸法を、エアバッグ組付体を略全周にわたって覆い可能な寸法として、長さ方向の両端付近に、それぞれ、取付ボルトを挿通させるための挿通孔を設けた略長方形シート状の基材から構成され、
基材を、長さ方向の中央付近に幅方向に沿った折り目をつけて二つ折りし、幅方向の両縁相互を熱溶着して、長さ方向の端部側を開口させた袋状に形成し、
エアバッグ組付体を、取付ボルトを一方の挿通孔から突出させつつ、開口部分から、ラッピング袋内に挿入させ、取付ボルトを他方の挿通孔に挿通させて、開口部分を構成する基材の両端を取付ボルトに係止させることにより、
ラッピング袋が、エアバッグ組付体を略全周にわたって覆っていることを特徴とする。
【０００８】
さらに、ラッピング袋のシート材が、幅寸法を、エアバッグ組付体の幅寸法より大きく、かつ、長さ寸法を、エアバッグ組付体を略全周にわたって覆い可能な寸法として、長さ方向の一端付近に、取付ボルトを挿通させるための挿通孔が形成された略長方形シート状の基材から構成し、
基材を、長さ方向の中央付近に幅方向に沿った折り目をつけて二つ折りし、幅方向の両縁相互を熱溶着して、長さ方向の端部側を開口させた袋状に形成し、
エアバッグ組付体を、取付ボルトを挿通孔から突出させつつ、開口部分から、ラッピング袋内に挿入させ、開口周縁における基材の長さ方向の両端相互を熱溶着させることにより、
ラッピング袋が、エアバッグ組付体を略全周にわたって覆っている構成としてもよい。
【０００９】
さらにまた、ラッピング袋のシート材が、幅寸法を、エアバッグ組付体の幅寸法より大きく、かつ、長さ寸法を、エアバッグ組付体を略全周にわたって覆い可能な寸法として、長さ方向の一端付近に、取付ボルトを挿通させるための挿通孔が形成された略長方形シート状の基材から構成され、
基材を、長さ方向の中央付近に幅方向に沿った折り目をつけて二つ折りし、エアバッグ組付体を、取付ボルトを挿通孔から突出させつつ、基材内に配置させて、基材の長さ方向の両端相互、及び、基材の幅方向の両縁を熱溶着させることにより、
ラッピング袋が、エアバッグ組付体を略全周にわたって覆っている構成としてもよい。
【００１０】
さらにまた、ラッピング袋のシート材が、
幅寸法を、エアバッグ組付体の幅寸法より大きく、かつ、長さ寸法を、エアバッグ組付体の長さ寸法より大きくした略長方形シート状の第１基材と、
第１基材と略同一の大きさに形成されて、取付ボルトを挿通させるための挿通孔が形成された第２基材と、
から構成されて、
第１・第２基材によってエアバッグ組付体を挟むように、エアバッグ組付体を、取付ボルトを挿通孔から突出させつつ、第１・第２基材間に配置させて、第１・第２基材の周縁を、全周にわたって、相互に熱溶着させることにより、
ラッピング袋が、エアバッグ組付体を略全周にわたって覆っている構成としてもよい。
【００１１】
【発明の効果】
本発明に係るエアバッグ装置では、ラッピング袋を構成するシート材が、相互に熱溶着可能であることから、そのシート材の所定位置を相互に単に熱溶着させれば、容易にラッピング袋を形成することができ、かつ、そのラッピング袋により、エアバッグ組付体の周囲を覆うことができる。そのため、エアバッグ組付体のラッピング作業が容易となる。また、エアバッグ組付体は、従来のような開口を有しないラッピング袋により略全周を覆われることとなるため、異物が混入する虞れがなく、また、エアバッグの折り崩れが生じる虞れもない。
【００１２】
従って、本発明のエアバッグ装置では、エアバッグ組付体のラッピング袋によるラッピング作業が容易となり、かつ、ラッピング袋により、エアバッグの全周を的確に覆うことができる。
【００１３】
また、ラッピング袋を構成するシート材は、難燃性を有していることから、ラッピング袋に、別途、難燃剤を塗布しなくとも、車両に好適に搭載させることができる。
【００１４】
さらに、請求項１若しくは２に記載したような構成とすれば、基材が、ラッピング作業前に、予め、袋状に形成されていることから、ラッピング作業時に、袋の開口部分からエアバッグ組付体を単に挿入させて開口部分を閉じれば、ラッピング袋によってエアバッグ組付体の略全周を包むことが可能となって、ラッピング作業が容易となる。特に、請求項１に記載したような構成とする場合には、開口部分を、取付ボルトに係止させて閉じる構成であることから、ラッピング作業時における熱溶着作業が不要となって、ラッピング作業が一層容易となる。
【００１５】
さらにまた、請求項３若しくは４に記載したような構成とすれば、ラッピング作業時に、シート状の基材を使用することから、エアバッグ組付体を、基材の所定位置に配置させて、基材の所定位置を熱溶着させれば、ラッピング袋によってエアバッグ組付体の略全周を包むことが可能となる。すなわち、ラッピング作業前に、基材を、予め、袋状に形成した場合に必要となるエアバッグ組付体の挿入作業が不要となることから、挿入工程を削減することができて、ラッピング作業を容易に自動化することができる。特に、請求項４に記載したような構成とする場合には、基材の折り返し作業が不要であることから、一層、ラッピング作業の自動化に好適である。
【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】
本発明の一実施形態であるエアバッグ装置として、図１・２に示すような側突用エアバッグ装置Ｍを例に採り説明する。側突用エアバッグ装置Ｍは、図１・２に示すように、車両用の座席１の背もたれ部２における車外側部位の上部に配置されている。
【００１８】
背もたれ部２には、略上下方向に配置されるシートフレーム３が配設され、側突用エアバッグ装置Ｍは、インフレーター１１の取付ブラケット１３から突出する取付ボルト１３ｂをナット８止めされて、フレーム３に固定されている。なお、４はクッション、５・６は装飾布等からなる表皮である。また、クッション４には、エアバッグ１５の膨張時にクッション４の破断位置を一定とするために、凹部４ｂが設けられている。
【００１９】
側突用エアバッグ装置Ｍは、折り畳まれたエアバッグ１５と、エアバッグ１５に膨張用ガスを供給するインフレーター１１と、エアバッグ１５及びインフレーター１１で構成されるエアバッグ組付体２０の周囲を覆うラッピング袋２１と、を備えて構成されている。
【００２０】
インフレーター１１は、図２・５〜７に示すように、本体１２と、２つの取付ブラケット１３と、を備えて構成され、本体１２は、略円柱状のシリンダタイプとして、リード線１２ｄから所定の電気信号を入力した際に、膨張用ガスを吐出させるものである。本体１２は、円柱状の大径部１２ａと、大径部１２ａ上端に設けられた小径部１２ｂと、を備えて構成されている。そして、小径部１２ｂには、図２に示すように、膨張用ガスを吐出させる複数のガス吐出口１２ｃが形成されている。各取付ブラケット１３は、円環状の板金製のクランプ部１３ａと、クランプ部１３ａに固着された取付ボルト１３ｂと、を備えて構成されている。各取付ブラケット１３は、本体１２の大径部１２ａにクランプ部１３ａが外装されるとともに、クランプ部１３ａが縮径されるようにかしめられて、本体１２に固定される構成である。
【００２１】
エアバッグ１５は、図１・２・５に示すように、展開膨張時の形状を、車内側壁部１８と車外側壁部１９とから構成される略長方形板状に形成されて、後部１７側の内部にインフレーター１１を内蔵させている。また、後部１７には、インフレーター１１の各取付ボルト１３ｂを挿通させる取付孔１７ａが形成されるとともに、インフレーター１１から延びるリード線１２ｄを挿通させるための図示しない挿通孔が形成されている。エアバッグ１５は、ポリアミド糸やポリエステル糸等を使用した織布で形成されている。また、エアバッグ１５は、後部１７側が折り目となった一枚の布材から形成され、その後部側を除いた部位の外周縁相互を縫合させて構成されている。
【００２２】
ラッピング袋２１は、エアバッグ１５の折り崩れ防止のために、折り畳まれたエアバッグ１５とインフレーター１１とで構成されるエアバッグ組付体２０の周囲を覆うもので、相互に熱溶着可能で、難燃性を有したシート材から形成されている。ラッピング袋２１は、実施形態では、後述するものも含めて、ポリエステルやポリアミド樹脂等の難燃性を備えた熱可塑性樹脂で形成される不織布等のシート材（基材３１・５１・６１・６２（図４・８・１０・１１参照））から形成されるものである。なお、具体的には、ラッピング袋２１を構成するシート材として、東洋紡績」株式会社製の「ハイム（登録商標）」（ポリエステルシート）や、ユニチカ株式会社製の「ナイエース（登録商標）」（ナイロンシート）等を好適に使用可能である。なお、本発明における難燃性は、ＪＩＳＤ１２０１の規格に基づくものであり、自消性を有したものである。
【００２３】
そして、実施形態では、ラッピング袋２１は、図３に示すような一端を開口させたラッピング袋構成体２２で構成されている。ラッピング袋構成体２２は、一端を開口されて、エアバッグ組付体２０を内部に挿入可能な袋本体２３と、袋本体２３から延設されて形成され、袋本体２３の開口部分２４を覆う閉じ部２５と、を備えて構成されている。そして、袋本体２３における開口部分２４付近と、閉じ部２５の端部付近と、には、取付ボルト１３ｂを挿通させるための挿通孔２６・２７が、それぞれ形成されている。また、閉じ部２５は、袋本体２３より幅寸法を小さく形成されており、開口部分２４における閉じ部２５に覆われない部位から、インフレーター１１のリード線１２ｄを突出させる構成である。
【００２４】
そして、ラッピング袋構成体２２のシート材は、図４のＡに示すように、幅寸法ｗ１を、エアバッグ組付体２０の幅寸法ｗ２（図６参照）より大きく、かつ、長さ寸法Ｌ１を、エアバッグ組付体２０を略全周（インフレーター１１の軸周り方向でのエアバッグ組付体２０の全周）にわたって覆い可能な寸法とした略長方形シート状の基材３０から構成されている。基材３０は、閉じ部２５を備えて、エアバッグ組付体２０の車外側を覆う車外側構成部３１と、車外側構成部３１の後述するスリット３４の部位に連結されて、エアバッグ組付体２０の車内側を覆う車内側構成部３２と、を備えている。車外側構成部３１と車内側構成部３２との間には、幅方向に沿うように、略全長にわたって、破線状に形成されるスリット３４が配設されている。このスリット３４は、エアバッグ１５の展開膨張時に、ラッピング袋２１の破断を容易とするために、設けられている。また、車内側構成部３２の端部及び閉じ部２５の端部となる基材３０の長さ方向の端部３０ａ・３０ｂ付近には、挿通孔２６・２７が、形成されている。
【００２５】
そして、ラッピング袋構成体２２は、図４のＢに示すように、基材３０を、スリット３４の配置位置となる長さ方向の中央付近に、幅方向に沿った折り目をつけて二つ折りし、幅方向の重ねた両縁３０ｃ・３０ｄ相互を熱溶着して、長さ方向の端部３０ａ・３０ｂを開口させた袋状に形成されることとなる。
【００２６】
次に、実施形態のエアバッグ装置Ｍの車両への搭載について説明する。まず、エアバッグ１５を折り畳む。エアバッグ１５は、図５のＡに示すように、各取付ボルト１３ｂを突出させて後部１７内にインフレーター１１を内蔵させた状態から、図５のＢに示すように、インフレーター１１の軸方向に沿った折り目をつけて、図６のＡに示すように、前部１６側を後部１７側に近づけるように、車内側壁部１８及び車外側壁部１９を、それぞれ、カクタス折りする。そして、図６のＢに示すように、カクタス折りされたエアバッグ３７の折り畳み部位３８を車外側壁部１９側に載せるように折り畳み、左右両端３９・４０付近を、図６のＣに示すように、車外側壁部１９側に折り返して、エアバッグ１５の折り畳みを完了し、エアバッグ組付体２０を形成する。
【００２７】
次いで、エアバッグ組付体２０を、ラッピング袋２１で覆う。まず、図７のＡに示すように、エアバッグ組付体２０を、ラッピング袋構成体２２の開口部分２４から、各取付ボルト１３ｂを挿通孔２６から突出させつつ、袋本体２３内に挿入して、図７のＢに示すように、袋本体２３内に収納する。そして、図７のＣに示すように、閉じ部２５を取付ボルト１３ｂ側に折り返して、取付ボルト１３ｂを閉じ部２５の端部３０ｂ付近に形成されている挿通孔２７に挿通させれば、開口部分２４を構成する基材３０の端部３０ａ・３０ｂを取付ボルト１３ｂに係止させることができる。そして、ラッピング袋２１が、車両搭載状態でのエアバッグ組付体２０に関し、インフレーター１１のリード線１２ｄの部位を除いて、車外側を車外側構成部３１と閉じ部２５が覆い、車内側を車内側構成部３２が覆い、前面側を車外側壁部３１と車内側壁部３２の境界部位付近のスリット３４の部位が覆い、後面側を閉じ部２５が覆い、上面側を熱溶着された縁部３０ｄ付近が覆い、下面側を熱溶着された縁部３０ｃ付近が覆うこととなって、エアバッグ組付体２０を全周にわたって覆うこととなる。
【００２８】
そして、ラッピング袋２１から突出した各取付ボルト１３ｂを、シートフレーム３にナット８止めして、座席１の背もたれ部２にエアバッグ装置Ｍを取り付け、クッション４や表皮５・６等を取り付けて、座席を組み立てた後、座席１を車両に装着させて、インフレーター１１から延びるリード線１２ｄを、図示しないエアバッグ作動用回路に結線させれば、エアバッグ装置Ｍを車両に搭載することができる。
【００２９】
エアバッグ装置Ｍの車両への搭載後、所定の作動信号がインフレーター本体１２に入力されて、ガス吐出口１２ｃから膨張用ガスが吐出されれば、エアバッグ１５が膨張して、スリット３４の部位を破断させてラッピング袋２１を破断するとともに、座席１の側方に配置されるクッションの部位４ａを開かせて、図１・２の二点鎖線で示すように、座席１から前方へ大きく突出するように膨張することとなる。
【００３０】
そして、実施形態のエアバッグ装置Ｍでは、ラッピング袋２１を構成するシート材（基材３０）が、相互に熱溶着可能であることから、そのシート材の所定位置を相互に単に熱溶着させれば、容易にラッピング袋２１を形成することができ、かつ、そのラッピング袋２１により、エアバッグ組付体２０の周囲を覆うことができる。そのため、エアバッグ組付体２０のラッピング作業が容易となる。また、エアバッグ組付体２０は、従来のような開口を有しないラッピング袋２１により全周を覆われることとなるため、異物が混入する虞れがなく、また、エアバッグ１５の折り崩れが生じる虞れもない。
【００３１】
従って、実施形態のエアバッグ装置Ｍでは、エアバッグ組付体２０のラッピング袋２１によるラッピング作業が容易となり、かつ、ラッピング袋２１により、エアバッグ１５の全周を的確に覆うことができる。
【００３２】
また、ラッピング袋２１を構成するシート材は、難燃性を有していることから、ラッピング袋２１に、別途、難燃剤を塗布しなくとも、車両に好適に搭載させることができる。
【００３３】
さらに、実施形態では、ラッピング袋２１を構成するシート材としての基材３０が、エアバッグ組付体２０をラッピング袋２１で覆うラッピング作業前に、予め、ラッピング袋構成体２２とされて、袋状に形成されていることから、ラッピング作業時に、ラッピング袋構成体２２の開口部分２４からエアバッグ組付体２０を単に挿入させて開口部分２４を閉じれば、ラッピング袋２１によってエアバッグ組付体２０の全周を包むことが可能となって、ラッピング作業が容易となる。特に、実施形態のラッピング袋構成体２２の場合には、開口部分２４を構成する基材３０の端部３０ａ・３０ｂを、取付ボルト１３ｂに係止させて、開口部分２４を閉じる構成であることから、ラッピング作業時における熱溶着作業が不要となって、ラッピング作業が一層容易となる。
【００３４】
なお、上記点を考慮しなければ、ラッピング袋４６として、図８のＢに示す構成のラッピング袋構成体４７からなるものを使用してもよい。ラッピング袋構成体４７は、一端を開口とされた袋状で、開口部分４８付近に、取付ボルト１３ｂを挿通させるための挿通孔４９を備えている。
【００３５】
このラッピング袋構成体４８のシート材は、図８のＡに示すように、幅寸法ｗ３を、エアバッグ組付体２０の幅寸法ｗ２より大きく、かつ、長さ寸法Ｌ２を、エアバッグ組付体２０を略全周（インフレーター１１の軸周り方向でのエアバッグ組付体２０の全周）にわたって覆い可能な寸法とした略長方形シート状の基材５１から構成されるものである。基材５１は、エアバッグ組付体２０の車外側を覆う車外側構成部５２と、エアバッグ組付体２０の車内側を覆う車内側構成部５３と、を備えている。そして、車外側構成部５２と車内側構成部５３との間には、前述のラッピング袋２１と同様に、幅方向に沿うように、略全長にわたって、破線状に形成されるスリット５４が配設されている。また、車内側構成部５３の端部となる基材５１の長さ方向の端部５１ａ付近には、挿通孔４９が、形成されている。
【００３６】
そして、ラッピング袋構成体４７は、図８のＢに示すように、基材５１を、スリット５４の配置位置となる長さ方向の中央付近に、幅方向に沿った折り目をつけて二つ折りし、幅方向の重ねた両縁５１ｃ・５１ｄ相互を熱溶着して、長さ方向の端部５１ａ・５１ｂを開口させた袋状に形成されることとなる。なお、長さ方向の端部５１ａ・５１ｂは、幅方向の縁部５１ｃ側が略矩形状に切り欠かれている。この切欠部分５１ｅ周縁は、ラッピング袋４６形成時に熱溶着されず、切欠部分５１ｅの開口からインフレーター１１のリード線１２ｄを突出させる構成である。
【００３７】
そして、上記のように形成されたラッピング袋構成体４７内に、エアバッグ組付体２０を、図９のＡ及びＢに示すごとく、取付ボルト１３ｂを挿通孔４９から突出させつつ、開口部分４８から挿入させて、図９のＣに示すように、開口部分４８周縁における基材５１の長さ方向の両端５１ａ・５１ｂ相互を熱溶着させれば、ラッピング袋４６が、エアバッグ組付体２０を全周にわたって覆うこととなる。すなわち、ラッピング袋４６が、車両搭載状態でのエアバッグ組付体２０に関し、インフレーター１１のリード線１２ｄの部位を除いて、車外側を車外側構成部５２が覆い、車内側を車内側構成部５３が覆い、前面側を車外側壁部５２と車内側壁部５３の境界部位付近のスリット５４の部位が覆い、後面側を熱溶着された端部５１ａ・５１ｂ付近が覆い、上面側を熱溶着された縁部５１ｄ付近が覆い、下面側を熱溶着された縁部５１ｃ付近が覆うこととなって、エアバッグ組付体２０を全周にわたって覆うこととなる。
【００３８】
また、ラッピング袋５６として、図１０に示すようにして、エアバッグ組付体２０の略全周を覆う構成のものを使用してもよい。ラッピング袋５６は、シート材として、図１０のＡに示すように、前述のラッピング袋４６における基材５１を使用するものである。そして、基材５１を、スリット５４の配置位置となる長さ方向の中央付近に、幅方向に沿った折り目をつけて二つ折りし、図１０のＢに示すように、エアバッグ組付体２０を、取付ボルト１３ｂを挿通孔４９から突出させつつ、基材５１内に配置させて、基材５１の長さ方向の両端５１ａ・５１ｂ相互、及び、基材５１の幅方向の重ねた両縁５１ｃ・５１ｄ相互を熱溶着させれば、ラッピング袋５６が、エアバッグ組付体２０を全周にわたって覆うこととなる。すなわち、ラッピング袋５６が、前述のラッピング袋４６と同様に、車両搭載状態でのエアバッグ組付体２０に関し、インフレーター１１のリード線１２ｄの部位を除いて、車外側を車外側構成部５２が覆い、車内側を車内側構成部５３が覆い、前面側を車外側壁部５２と車内側壁部５３の境界部位付近のスリット５４の部位が覆い、後面側を熱溶着された端部５１ａ・５１ｂ付近が覆い、上面側を熱溶着された縁部５１ｄ付近が覆い、下面側を熱溶着された縁部５１ｃ付近が覆うこととなって、エアバッグ組付体２０を全周にわたって覆うこととなる。
【００３９】
ラッピング袋５６を上記のような構成とすれば、ラッピング作業時に、シート状の基材５１を使用することから、エアバッグ組付体２０を、基材５１の所定位置に配置させて、基材５１の長さ方向の両端５１ａ・５１ｂ相互、及び、幅方向の重ねた両縁５１ｃ・５１ｄ相互を熱溶着させれば、ラッピング袋５６によってエアバッグ組付体２０の全周を包むことが可能となる。すなわち、前述のラッピング袋２１・４６のように、ラッピング作業前に、基材３０・５１を、予め、袋状に形成した場合に必要となるエアバッグ組付体２０の挿入作業が不要となることから、挿入工程を削減することができて、ラッピング作業を容易に自動化することができる。
【００４０】
さらに、ラッピング袋５９として、図１１・１２に示すようにして、エアバッグ組付体２０の全周を覆う構成のものを使用してもよい。ラッピング袋５９のシート材は、図１１のＡに示すように、幅寸法ｗ４を、エアバッグ組付体２０の幅寸法ｗ２より大きく、かつ、長さ寸法Ｌ３を、エアバッグ組付体２０の長さ寸法Ｌ４より大きくした略長方形シート状の第１基材６１と、第１基材６１と略同一の大きさに形成されて、長さ方向の一端６２ｂ付近に取付ボルト１３ｂを挿通させるための挿通孔６３が形成された第２基材６２と、から構成されている。第１基布６１は、エアバッグ組付体２０の車外側を覆う構成で、第２基布６２はエアバッグ組付体２０の車内側を覆う構成である。なお、第１基材６１及び第２基材６２の長さ方向の一端６１ｂ・６２ｂは、幅方向の縁部６１ｃ・６２ｃ側が略矩形状に切り欠かれている。この切欠部分６１ｅ・６２ｅ周縁は、ラッピング袋５９形成時に熱溶着されず、切欠部分６１ｅ・６２ｅの開口からインフレーター１１のリード線１２ｄを突出させる構成である。
【００４１】
そして、図１１のＢ及び図１２のＡに示すように、第１・第２基材６１・６２によってエアバッグ組付体２０を挟むように、エアバッグ組付体２０を、取付ボルト１３ｂを挿通孔６３から突出させつつ、第１・第２基材６１・６２間に配置させて、図１２のＢに示すように、第１・第２基材６１・６２の周縁６１ａ・６１ｂ・６１ｃ・６１ｄ・６２ａ・６２ｂ・６２ｃ・６２ｄを、相互に熱溶着させれば、ラッピング袋５９が、エアバッグ組付体２０を略全周にわたって覆うこととなる。すなわち、ラッピング袋５９が、車両搭載状態でのエアバッグ組付体２０に関し、インフレーター１１のリード線１２ｄの部位を除いて、車外側を第１基材６１が覆い、車内側を第２基材６２が覆い、前面側を熱溶着された端部６１ａ・６２ａ付近が覆い、後面側を熱溶着された端部６１ｂ・６２ｂ付近が覆い、上面側を熱溶着された縁部６１ｄ・６２ｄ付近が覆い、下面側を熱溶着された縁部６１ｃ・６２ｃ付近が覆うこととなって、エアバッグ組付体２０を全周にわたって覆うこととなる。
【００４２】
そして、ラッピング袋５９をこのような構成とすれば、前述のラッピング袋５６形成時に必要な基材の折り返し作業が不要であることから、一層、ラッピング作業の自動化に好適である。
【００４３】
なお、実施形態では、側突用エアバッグ装置を例に採り説明したが、本発明を適用可能なエアバッグ装置は、側突用エアバッグ装置に限られるものではなく、例えば、頭部保護エアバッグ装置にも適用可能である。
【図面の簡単な説明】
【図１】本発明の一実施形態である側突用エアバッグ装置の使用態様を示す座席の側面図である。
【図２】図１のII−II部位の概略断面図である。
【図３】同実施形態のエアバッグ装置におけるラッピング袋構成体の平面図である。
【図４】同実施形態のエアバッグ装置におけるラッピング袋構成体の製造工程を説明する図である。
【図５】同実施形態のエアバッグ装置におけるエアバッグの折り畳み工程を説明する図である。
【図６】同実施形態のエアバッグ装置におけるエアバッグの折り畳み工程を説明する図であり、図５の後の工程を示す。
【図７】同実施形態のエアバッグ装置におけるエアバッグ組付体のラッピング作業工程を説明する図である。
【図８】他の形態のラッピング袋構成体及びその製造工程を説明する図である。
【図９】図８のラッピング袋構成体を使用したエアバッグ組付体のラッピング作業工程を説明する図である。
【図１０】さらに他の形態のラッピング袋を使用したエアバッグ組付体のラッピング作業工程を説明する図である。
【図１１】さらに他の形態のラッピング袋を使用したエアバッグ組付体のラッピング作業工程を説明する図である。
【図１２】図１１に示すラッピング袋を使用したエアバッグ組付体のラッピング作業工程を説明する図であり、図１１の後の工程を示す。
【符号の説明】
１１…インフレーター、
１２…本体、
１３ｂ…取付ボルト、
１５…エアバッグ、
２０…エアバッグ組付体、
２１…ラッピング袋、
２２…ラッピング袋構成体、
２４…開口部分、
２６・２７…挿通孔、
３０…基材（シート材）、
４６…ラッピング袋、
４７…ラッピング袋構成体、
４８…開口部分、
４９…挿通孔、
５１…基材（シート材）、
５６…ラッピング袋、
５９…ラッピング袋、
６１…第１基材（シート材）、
６２…第２基材（シート材）、
６３…挿通孔、
Ｍ…側突用エアバッグ装置。[0001]
BACKGROUND OF THE INVENTION
According to the present invention, the airbag assembly including the folded airbag and the inflator that supplies inflation gas to the airbag can prevent the airbag from collapsing. The present invention relates to an airbag device that is covered with a wrapping material that can be broken during deployment and mounted on a vehicle.
[0002]
[Prior art and its problems]
Conventionally, as an airbag device having the above-described configuration, for example, there has been a configuration shown in JP-A-2001-151064.
[0003]
In this airbag device, one end of a long wrapping material is inserted and fixed between folds of an airbag folded in a bellows shape, and the wrapping material is wound around the airbag assembly. The end was locked to the mounting bolt of the inflator protruding from the airbag assembly, and the periphery of the airbag assembly was covered with a wrapping material.
[0004]
However, in the airbag apparatus having the above configuration, one end of the wrapping material has to be inserted and fixed between the folds of the airbag, and the wrapping operation of the airbag assembly is troublesome. In addition, since both ends in the width direction of the wrapping material are open, there is a possibility that the airbag may collapse when a strong impact is applied to the airbag assembly. And there also existed a possibility that a foreign material may mix from the opening part of a wrapping material.
[0005]
The present invention solves the above-described problems, and an object thereof is to provide an airbag device provided with a wrapping material that can easily cover a whole circumference of the airbag.
[0006]
[Means for Solving the Problems]
  An airbag device according to the present invention prevents an airbag from collapsing around an airbag assembly including a folded airbag and an inflator that supplies inflation gas to the airbag. In an airbag device configured to be mounted on a vehicle, covered with a wrapping material that can be broken when the airbag is deployed and inflated,
  The wrapping material is formed from a sheet material that can be thermally welded to each other and has flame retardancy,
  The airbag assembly is covered with a wrapping bag formed by heat-welding a wrapping material, and is mounted on the vehicle almost entirely.,
  The inflator
  A body capable of supplying inflation gas;
  A mounting bolt that is disposed so as to protrude from the main body, and for mounting and fixing the airbag assembly to the vehicle;
  As a configuration comprising
  The length of the sheet material of the wrapping bag is larger than the width dimension of the airbag assembly, and the length dimension is such that the airbag assembly can be covered over the entire circumference. In the vicinity, each is composed of a substantially rectangular sheet-like base material provided with an insertion hole for inserting a mounting bolt,
  The base material is folded in two along the width direction near the center in the length direction, and both edges in the width direction are heat welded to form a bag shape with the end in the length direction opened. Forming,
  The airbag assembly is inserted into the wrapping bag through the opening while the mounting bolt protrudes from one insertion hole, and the mounting bolt is inserted into the other insertion hole to form a base material constituting the opening. By locking both ends to the mounting bolt,
  A wrapping bag covers the airbag assembly over almost the entire circumference.It is characterized by that.
[0008]
Furthermore, the sheet material of the wrapping bag has a width dimension larger than the width dimension of the airbag assembly, and the length dimension is a dimension that can cover the airbag assembly over substantially the entire circumference. In the vicinity of one end of the base plate, a substantially rectangular sheet-like base material in which an insertion hole for inserting a mounting bolt is formed,
The base material is folded in two along the width direction near the center in the length direction, and both edges in the width direction are heat welded to form a bag shape with the end in the length direction opened. Forming,
The airbag assembly is inserted into the wrapping bag from the opening portion while protruding the mounting bolt from the insertion hole, and both ends in the length direction of the base material at the periphery of the opening are thermally welded,
The wrapping bag may be configured to cover the airbag assembly over substantially the entire circumference.
[0009]
Furthermore, the sheet material of the wrapping bag has a width dimension that is larger than the width dimension of the airbag assembly, and the length dimension is such that the airbag assembly can be covered over substantially the entire circumference. In the vicinity of one end in the direction, it is composed of a substantially rectangular sheet-like base material in which an insertion hole for inserting a mounting bolt is formed,
The base material is folded in two along the width direction near the center in the length direction, and the airbag assembly is placed in the base material with the mounting bolt protruding from the insertion hole. By thermally welding both edges in the length direction of the material and both edges in the width direction of the base material,
The wrapping bag may be configured to cover the airbag assembly over substantially the entire circumference.
[0010]
Furthermore, the sheet material of the wrapping bag is
A substantially rectangular sheet-shaped first base material having a width dimension larger than the width dimension of the airbag assembly and a length dimension larger than the length dimension of the airbag assembly;
A second base material that is formed to be substantially the same size as the first base material and has an insertion hole for inserting the mounting bolt;
Consists of
The airbag assembly is disposed between the first and second substrates with the mounting bolt protruding from the insertion hole so that the airbag assembly is sandwiched between the first and second substrates. -By thermally welding the peripheral edge of the second substrate over the entire periphery,
The wrapping bag may be configured to cover the airbag assembly over substantially the entire circumference.
[0011]
【The invention's effect】
In the airbag device according to the present invention, since the sheet materials constituting the wrapping bag can be thermally welded to each other, the wrapping bag can be easily formed by simply thermally welding the predetermined positions of the sheet materials to each other. The surroundings of the airbag assembly can be covered with the wrapping bag. Therefore, the lapping operation of the airbag assembly is facilitated. In addition, since the airbag assembly is almost entirely covered with a wrapping bag having no opening as in the prior art, there is no possibility of foreign matter being mixed in, and the airbag may be collapsed. There is nothing.
[0012]
Therefore, in the airbag apparatus of the present invention, the wrapping operation by the wrapping bag of the airbag assembly is facilitated, and the entire circumference of the airbag can be covered accurately by the wrapping bag.
[0013]
Moreover, since the sheet | seat material which comprises a wrapping bag has a flame retardance, even if it does not apply a flame retardant separately to a wrapping bag, it can be suitably mounted in a vehicle.
[0014]
  And claims1Or2Since the base material is formed in a bag shape before the wrapping operation, the airbag assembly is simply inserted from the opening portion of the bag during the wrapping operation. If the opening portion is closed, it is possible to wrap substantially the entire circumference of the airbag assembly with the wrapping bag, which facilitates the wrapping operation. In particular, the claims1In the case of the configuration as described above, since the opening portion is configured to be closed by being locked to the mounting bolt, the heat welding operation at the time of the wrapping operation is unnecessary, and the wrapping operation is further facilitated. .
[0015]
  Furthermore, the claims3Or4If a configuration such as that described above is used, a sheet-like base material is used during lapping work, so the airbag assembly is placed at a predetermined position on the base material, and the predetermined position on the base material is thermally welded. By doing so, it becomes possible to wrap the substantially entire circumference of the airbag assembly with the wrapping bag. That is, before the wrapping operation, the insertion work of the airbag assembly, which is necessary when the base material is formed in a bag shape in advance, becomes unnecessary, so the insertion process can be reduced and the wrapping operation can be reduced. Can be easily automated. In particular, the claims4In the case of the configuration as described in (1), since the base material folding work is unnecessary, it is more suitable for automating the lapping work.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0017]
A side collision airbag apparatus M as shown in FIGS. 1 and 2 will be described as an example of an airbag apparatus according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the side airbag device M is disposed at the upper portion of the vehicle exterior side portion of the backrest portion 2 of the vehicle seat 1.
[0018]
The backrest 2 is provided with a seat frame 3 that is arranged in a substantially vertical direction. The side airbag device M has a mounting bolt 13b protruding from the mounting bracket 13 of the inflator 11 with a nut 8 fixed thereto, 3 is fixed. Reference numeral 4 is a cushion, and 5 and 6 are skins made of decorative cloth or the like. Further, the cushion 4 is provided with a recess 4b in order to make the breaking position of the cushion 4 constant when the airbag 15 is inflated.
[0019]
The side impact airbag apparatus M includes a folded airbag 15, an inflator 11 that supplies inflation gas to the airbag 15, and an airbag assembly 20 that includes the airbag 15 and the inflator 11. And a wrapping bag 21 to be covered.
[0020]
The inflator 11 includes a main body 12 and two mounting brackets 13 as shown in FIGS. 2 to 5, and the main body 12 is formed as a substantially cylindrical cylinder type from a lead wire 12 d to a predetermined length. When an electrical signal is input, the inflation gas is discharged. The main body 12 includes a cylindrical large diameter portion 12a and a small diameter portion 12b provided at the upper end of the large diameter portion 12a. As shown in FIG. 2, the small-diameter portion 12b is formed with a plurality of gas discharge ports 12c for discharging the expansion gas. Each mounting bracket 13 includes an annular sheet metal clamp portion 13a, and a mounting bolt 13b fixed to the clamp portion 13a. Each mounting bracket 13 is configured to be fixed to the main body 12 by being clamped so that the clamp portion 13a is reduced in diameter while the clamp portion 13a is externally mounted on the large diameter portion 12a of the main body 12.
[0021]
As shown in FIGS. 1, 2, and 5, the airbag 15 is formed in a substantially rectangular plate shape that includes a vehicle inner side wall portion 18 and a vehicle outer side wall portion 19 when deployed and inflated. The inflator 11 is built in the inside. Further, the rear portion 17 is formed with an attachment hole 17a through which each attachment bolt 13b of the inflator 11 is inserted, and an insertion hole (not shown) through which the lead wire 12d extending from the inflator 11 is inserted. The airbag 15 is formed of a woven fabric using polyamide yarn, polyester yarn or the like. The airbag 15 is formed from a single piece of cloth material having a crease at the rear portion 17 side, and is configured by stitching the outer peripheral edges of portions other than the rear portion side.
[0022]
The wrapping bag 21 covers the periphery of the airbag assembly 20 composed of the folded airbag 15 and the inflator 11 in order to prevent the airbag 15 from collapsing, and can be thermally welded to each other. It is formed from a flame-retardant sheet material. In the embodiment, the wrapping bag 21 includes a sheet material such as a nonwoven fabric formed of a thermoplastic resin having flame retardancy such as polyester and polyamide resin (base materials 31, 51, 61, 62) including those described later. (See FIGS. 4, 8, 10, and 11)). Specifically, as a sheet material constituting the wrapping bag 21, “Hyme (registered trademark)” (polyester sheet) manufactured by Toyobo Co., Ltd., and “Niace (registered trademark)” manufactured by Unitika Ltd. ( Nylon sheet) or the like can be suitably used. In addition, the flame retardance in this invention is based on the specification of JISD1201, and has self-extinguishing property.
[0023]
And in embodiment, the wrapping bag 21 is comprised by the wrapping bag structure 22 which opened one end as shown in FIG. The wrapping bag structure 22 is formed with an opening at one end, a bag body 23 into which the airbag assembly 20 can be inserted, and an extension from the bag body 23 to cover the opening 24 of the bag body 23. And a closing portion 25. Insertion holes 26 and 27 through which the mounting bolts 13 b are inserted are formed in the vicinity of the opening 24 in the bag body 23 and in the vicinity of the end of the closing portion 25, respectively. Further, the closing portion 25 is formed to have a width dimension smaller than that of the bag body 23, and the lead wire 12d of the inflator 11 protrudes from a portion of the opening portion 24 that is not covered by the closing portion 25.
[0024]
And the sheet | seat material of the wrapping bag structure 22 is larger than the width dimension w2 (refer FIG. 6) of the airbag assembly | attachment 20, and length dimension L1 as shown to A of FIG. Is formed of a substantially rectangular sheet-like base material 30 that is dimensioned to cover the airbag assembly 20 over substantially the entire circumference (the entire circumference of the airbag assembly 20 in the direction around the axis of the inflator 11). Yes. The base material 30 includes a closing portion 25 and is connected to a vehicle exterior component 31 that covers the vehicle exterior side of the airbag assembly 20 and a later-described slit 34 of the vehicle exterior component 31. A vehicle interior component 32 that covers the vehicle interior of the appendage 20. Between the vehicle exterior component 31 and the vehicle interior component 32, a slit 34 formed in a broken line shape is disposed over substantially the entire length along the width direction. The slit 34 is provided to facilitate breaking of the wrapping bag 21 when the airbag 15 is deployed and inflated. Further, insertion holes 26 and 27 are formed in the vicinity of the end portions 30 a and 30 b in the length direction of the base material 30 that are the end portions of the vehicle interior component portion 32 and the end portions of the closing portion 25.
[0025]
Then, as shown in FIG. 4B, the wrapping bag structure 22 folds the base material 30 in two near the center in the length direction where the slits 34 are arranged, with a fold along the width direction. The two edges 30c and 30d overlapped in the width direction are thermally welded to form a bag shape with the end portions 30a and 30b in the length direction opened.
[0026]
Next, mounting of the airbag device M of the embodiment on a vehicle will be described. First, the airbag 15 is folded. As shown in FIG. 5A, the airbag 15 extends from the state in which the mounting bolts 13 b protrude and the inflator 11 is built in the rear portion 17, as shown in FIG. 5B, in the axial direction of the inflator 11. As shown in FIG. 6A, the vehicle interior side wall portion 18 and the vehicle exterior wall portion 19 are each cactus folded so that the front portion 16 side approaches the rear portion 17 side. Then, as shown in FIG. 6B, the folded portion 38 of the airbag 37 that is folded into the cactus is folded so as to be placed on the vehicle outer wall 19 side, and the vicinity of both left and right ends 39 and 40 is shown in FIG. 6C. The airbag 15 is folded back to complete the folding of the airbag 15 to form the airbag assembly 20.
[0027]
Next, the airbag assembly 20 is covered with a wrapping bag 21. First, as shown in FIG. 7A, the airbag assembly 20 is inserted into the bag body 23 from the opening 24 of the wrapping bag structure 22 with the mounting bolts 13b protruding from the insertion holes 26. Then, as shown in B of FIG. Then, as shown in FIG. 7C, when the closing portion 25 is folded back to the mounting bolt 13b side and the mounting bolt 13b is inserted through the insertion hole 27 formed near the end 30b of the closing portion 25, the opening The end portions 30a and 30b of the base material 30 constituting the portion 24 can be locked to the mounting bolt 13b. Then, the wrapping bag 21 relates to the airbag assembly 20 in a vehicle-mounted state, except for the portion of the lead wire 12d of the inflator 11, the vehicle exterior component 31 and the closing portion 25 cover the vehicle exterior, and the vehicle interior is covered. The inner side covering portion 32 covers, the front side covers the portion of the slit 34 in the vicinity of the boundary portion between the outer side wall portion 31 and the inner side wall portion 32, the rear surface side covers the closing portion 25, and the upper surface side is thermally welded. The vicinity of the portion 30d covers and the vicinity of the edge portion 30c that is thermally welded on the lower surface side covers the airbag assembly 20 over the entire circumference.
[0028]
Then, the mounting bolts 13b protruding from the wrapping bag 21 are fastened with nuts 8 to the seat frame 3, the airbag device M is attached to the backrest 2 of the seat 1, the cushion 4, the skins 5 and 6 are attached, After assembling the seat, if the seat 1 is mounted on the vehicle and the lead wire 12d extending from the inflator 11 is connected to an airbag operation circuit (not shown), the airbag device M can be mounted on the vehicle.
[0029]
After the airbag device M is mounted on the vehicle, if a predetermined operation signal is input to the inflator body 12 and the inflation gas is discharged from the gas discharge port 12c, the airbag 15 is inflated, and the portion of the slit 34 And the wrapping bag 21 is broken, and the cushion portion 4a disposed on the side of the seat 1 is opened, and as shown by a two-dot chain line in FIGS. Will expand.
[0030]
And in the airbag apparatus M of embodiment, since the sheet | seat material (base material 30) which comprises the wrapping bag 21 can mutually be heat-welded, the predetermined position of the sheet | seat material is simply heat-welded mutually. Thus, the wrapping bag 21 can be easily formed, and the wrapping bag 21 can cover the periphery of the airbag assembly 20. Therefore, the lapping work of the airbag assembly 20 is facilitated. In addition, since the airbag assembly 20 is entirely covered with a lapping bag 21 that does not have an opening as in the prior art, there is no possibility of foreign matter being mixed, and the airbag 15 is not collapsed. There is no fear of it occurring.
[0031]
Therefore, in the airbag apparatus M of the embodiment, the wrapping operation by the wrapping bag 21 of the airbag assembly 20 is facilitated, and the entire circumference of the airbag 15 can be accurately covered by the wrapping bag 21.
[0032]
Moreover, since the sheet | seat material which comprises the wrapping bag 21 has a flame retardance, even if it does not apply a flame retardant separately to the wrapping bag 21, it can be suitably mounted in a vehicle.
[0033]
Further, in the embodiment, the base material 30 as a sheet material constituting the wrapping bag 21 is previously set as the wrapping bag structure 22 before the wrapping operation for covering the airbag assembly body 20 with the wrapping bag 21. Therefore, when the airbag assembly 20 is simply inserted from the opening portion 24 of the wrapping bag structure 22 and the opening portion 24 is closed during the wrapping operation, the airbag assembly is formed by the wrapping bag 21. It is possible to wrap the entire circumference of 20 and wrapping work becomes easy. In particular, in the case of the wrapping bag structure 22 of the embodiment, the end portions 30a and 30b of the base material 30 constituting the opening portion 24 are engaged with the mounting bolts 13b and the opening portion 24 is closed. Therefore, the heat welding operation at the time of the wrapping operation becomes unnecessary, and the wrapping operation becomes easier.
[0034]
If the above points are not taken into consideration, the wrapping bag 46 may be made of a wrapping bag structure 47 having the configuration shown in FIG. The wrapping bag constituting body 47 has a bag shape with one end opened, and is provided with an insertion hole 49 in the vicinity of the opening portion 48 for inserting the mounting bolt 13b.
[0035]
As shown in FIG. 8A, the sheet material of the wrapping bag constituting body 48 has a width dimension w3 larger than the width dimension w2 of the airbag assembly body 20 and a length dimension L2 of the airbag assembly. The body 20 is constituted by a substantially rectangular sheet-like base material 51 having a dimension capable of covering the body 20 over substantially the entire circumference (the entire circumference of the airbag assembly body 20 in the direction around the axis of the inflator 11). The base member 51 includes a vehicle exterior component 52 that covers the vehicle exterior of the airbag assembly 20 and a vehicle interior component 53 that covers the vehicle interior of the airbag assembly 20. Between the vehicle exterior component 52 and the vehicle interior component 53, a slit 54 formed in a broken line shape is disposed over substantially the entire length along the width direction, like the wrapping bag 21 described above. Has been. Further, an insertion hole 49 is formed in the vicinity of the end portion 51 a in the length direction of the base material 51 that becomes the end portion of the vehicle interior side configuration portion 53.
[0036]
Then, as shown in FIG. 8B, the wrapping bag constituting body 47 folds the base material 51 in two near the center in the length direction at which the slit 54 is arranged, with a fold along the width direction. The two edges 51c and 51d overlapped in the width direction are thermally welded to form a bag shape with the end portions 51a and 51b in the length direction opened. Note that the end portions 51a and 51b in the length direction are notched in a substantially rectangular shape on the edge portion 51c side in the width direction. The periphery of the cutout portion 51e is not thermally welded when the wrapping bag 46 is formed, and the lead wire 12d of the inflator 11 protrudes from the opening of the cutout portion 51e.
[0037]
Then, in the wrapping bag structure 47 formed as described above, the airbag assembly 20 is opened as shown in FIGS. 9A and 9B while the mounting bolt 13b is projected from the insertion hole 49. 9C, the both ends 51a and 51b in the longitudinal direction of the base material 51 at the periphery of the opening 48 are heat-welded to each other as shown in FIG. 9C. Will be covered all around. That is, the wrapping bag 46 relates to the airbag assembly 20 in the vehicle mounted state, except for the portion of the lead wire 12d of the inflator 11, the vehicle exterior component 52 covers the vehicle exterior, and the vehicle interior comprises the vehicle interior component. 53 covers, the front side is covered with the slit 54 near the boundary between the vehicle outer wall 52 and the vehicle inner wall 53, the rear side is covered with the thermally welded ends 51 a and 51 b, and the upper surface is thermally welded. The vicinity of the edge 51d is covered, and the vicinity of the edge 51c that is thermally welded is covered on the lower surface side, so that the airbag assembly 20 is covered over the entire circumference.
[0038]
Further, as the wrapping bag 56, as shown in FIG. 10, a structure that covers substantially the entire circumference of the airbag assembly 20 may be used. The wrapping bag 56 uses the base material 51 in the aforementioned wrapping bag 46 as a sheet material, as shown in FIG. Then, the base material 51 is folded in two near the center in the length direction where the slits 54 are arranged, with a fold along the width direction, and as shown in FIG. 10B, the airbag assembly 20 Are arranged in the base material 51 with the mounting bolts 13 b protruding from the insertion holes 49, and both edges 51 a and 51 b in the length direction of the base material 51 and both edges of the base material 51 overlapped in the width direction. If 51c and 51d are heat-welded, the wrapping bag 56 will cover the airbag assembly 20 over the entire circumference. That is, the wrapping bag 56 is similar to the wrapping bag 46 described above, and the vehicle exterior component 52 is located outside the vehicle except for the portion of the lead wire 12d of the inflator 11, with respect to the airbag assembly 20 in the vehicle mounted state. The vehicle interior side portion 53 covers the vehicle interior side, the front side covers the portion of the slit 54 near the boundary between the vehicle outer side wall portion 52 and the vehicle interior side wall portion 53, and the rear surface side end portions 51a and 51b are heat-welded. The vicinity covers the vicinity of the edge 51d that has been heat-welded on the upper surface side, and the vicinity of the edge 51c that has been heat-welded on the lower surface side, so that the airbag assembly 20 is covered all around. .
[0039]
  When the wrapping bag 56 is configured as described above, since the sheet-like base material 51 is used during the wrapping operation, the airbag assembly 20 is disposed at a predetermined position of the base material 51, and the base material 51 is used. If both ends 51a and 51b in the length direction of 51 and both edges 51c and 51d overlapped in the width direction are thermally welded, a wrapping bag is obtained.56Therefore, the entire circumference of the airbag assembly 20 can be wrapped. That is, as in the case of the wrapping bags 21 and 46 described above, it is not necessary to insert the airbag assembly 20 which is necessary when the base materials 30 and 51 are formed in a bag shape before the wrapping operation. Therefore, the insertion process can be reduced, and the lapping operation can be easily automated.
[0040]
Furthermore, as the wrapping bag 59, as shown in FIGS. 11 and 12, a bag covering the entire circumference of the airbag assembly 20 may be used. As shown in FIG. 11A, the sheet material of the wrapping bag 59 has a width dimension w4 larger than the width dimension w2 of the airbag assembly 20, and a length dimension L3 of the airbag assembly 20. A substantially rectangular sheet-shaped first base material 61 that is larger than the length dimension L4, and is formed to be approximately the same size as the first base material 61, and the mounting bolt 13b is inserted near one end 62b in the length direction. And a second base material 62 in which an insertion hole 63 is formed. The first base fabric 61 is configured to cover the vehicle exterior side of the airbag assembly body 20, and the second base fabric 62 is configured to cover the vehicle interior side of the airbag assembly body 20. Note that the longitudinal ends 61b and 62b of the first base material 61 and the second base material 62 are notched in a substantially rectangular shape on the edge portions 61c and 62c side in the width direction. The periphery of the cutout portions 61e and 62e is not thermally welded when the wrapping bag 59 is formed, and the lead wire 12d of the inflator 11 protrudes from the opening of the cutout portions 61e and 62e.
[0041]
And as shown to B of FIG. 11 and A of FIG. 12, the mounting bolt 13b is attached to the airbag assembly body 20 so that the airbag assembly body 20 is sandwiched between the first and second base members 61 and 62. As shown in FIG. 12B, the peripheral edges 61a, 61b and 61c of the first and second base materials 61 and 62 are arranged between the first and second base materials 61 and 62 while projecting from the insertion hole 63. If 61d, 62a, 62b, 62c, and 62d are heat-welded with each other, the wrapping bag 59 covers the airbag assembly 20 over substantially the entire circumference. That is, the wrapping bag 59 relates to the airbag assembly 20 in a vehicle-mounted state, except for the portion of the lead wire 12d of the inflator 11, the first base 61 covers the vehicle outer side, and the second base material covers the vehicle inner side. 62 covers the front side of the heat-welded end portions 61a and 62a, covers the rear surface of the heat-welded ends 61b and 62b, and covers the upper surface of the heat-welded edges 61d and 62d. The vicinity of the edge portions 61c and 62c covered and covered on the lower surface side is covered, and the airbag assembly 20 is covered over the entire circumference.
[0042]
If the wrapping bag 59 has such a configuration, the above-described base material folding operation required when forming the wrapping bag 56 is unnecessary, which is more suitable for automating the wrapping operation.
[0043]
In the embodiment, the side collision airbag apparatus has been described as an example. However, the airbag apparatus to which the present invention is applicable is not limited to the side collision airbag apparatus. The present invention can also be applied to a bag device.
[Brief description of the drawings]
FIG. 1 is a side view of a seat showing a usage mode of a side-impact airbag device according to an embodiment of the present invention.
2 is a schematic cross-sectional view taken along a line II-II in FIG.
FIG. 3 is a plan view of a wrapping bag structure in the airbag device of the embodiment.
FIG. 4 is a diagram illustrating a manufacturing process of the wrapping bag structure in the airbag device of the embodiment.
FIG. 5 is a diagram illustrating an airbag folding process in the airbag device of the embodiment;
6 is a view for explaining a folding process of the airbag in the airbag apparatus of the embodiment, showing a process subsequent to FIG. 5. FIG.
FIG. 7 is a view illustrating a lapping work process for an airbag assembly in the airbag apparatus of the embodiment.
FIG. 8 is a diagram illustrating a wrapping bag structure according to another embodiment and a manufacturing process thereof.
9 is a diagram for explaining a wrapping operation process of an airbag assembly using the wrapping bag structure of FIG. 8. FIG.
FIG. 10 is a diagram for explaining a wrapping operation process for an airbag assembly using a wrapping bag of still another embodiment.
FIG. 11 is a diagram for explaining a wrapping operation process of an airbag assembly using a wrapping bag of still another embodiment.
12 is a diagram for explaining a wrapping operation process of an airbag assembly using the wrapping bag shown in FIG. 11, and shows a process subsequent to FIG.
[Explanation of symbols]
11 ... Inflator,
12 ... the body,
13b ... Mounting bolt,
15 ... Airbag,
20 ... airbag assembly,
21 ... wrapping bags,
22 ... Wrapping bag structure,
24 ... opening part,
26, 27 ... insertion hole,
30 ... Base material (sheet material),
46 ... wrapping bags,
47 ... Wrapping bag structure,
48 ... opening part,
49. Insertion hole,
51 ... Base material (sheet material),
56 ... wrapping bags,
59 ... wrapping bags,
61 ... 1st base material (sheet material),
62 ... 2nd base material (sheet material),
63 ... insertion hole,
M: Side impact airbag device.

Claims

Deploying the airbag so that the airbag can be prevented from collapsing around the airbag assembly comprising a folded airbag and an inflator that supplies inflation gas to the airbag. In an airbag device configured to be mounted on a vehicle, covered with a wrapping material that can be broken when inflated,
The wrapping material is heat-weld to each other, formed from a flame retardant sheet material,
The airbag assembly is covered with a wrapping bag formed by thermally welding the wrapping material, and is mounted on a vehicle, covering substantially the entire circumference .
The inflator is
A main body capable of supplying the expansion gas;
A mounting bolt disposed so as to protrude from the main body, and for fixing the airbag assembly to the vehicle;
As a configuration comprising
The sheet material of the wrapping bag has a width dimension that is larger than the width dimension of the airbag assembly, and a length dimension that can cover the airbag assembly over substantially the entire circumference. In the vicinity of both ends in the direction, each comprises a substantially rectangular sheet-like base material provided with an insertion hole for inserting the mounting bolt,
The base material is folded in two along the width direction in the vicinity of the center in the length direction, and the two edges in the width direction are heat welded to each other, and the end side in the length direction is opened. Formed into
The airbag assembly is inserted into the wrapping bag from the opening while the mounting bolt protrudes from one of the insertion holes, and the mounting bolt is inserted into the other insertion hole to open the opening. By locking both ends of the base material constituting the part to the mounting bolt,
The airbag device , wherein the wrapping bag covers the airbag assembly over substantially the entire circumference .

Deploying the airbag so that the airbag can be prevented from collapsing around the airbag assembly comprising a folded airbag and an inflator that supplies inflation gas to the airbag. In an airbag device configured to be mounted on a vehicle, covered with a wrapping material that can be broken when inflated,
The wrapping material is heat-weld to each other, formed from a flame retardant sheet material,
The airbag assembly is substantially entirely covered by a wrapping bag formed by thermally welding the wrapping material, and is mounted on a vehicle.
The inflator is
A main body capable of supplying the expansion gas;
A mounting bolt disposed so as to protrude from the main body, and for fixing the airbag assembly to the vehicle;
As a configuration comprising
The sheet material of the wrapping bag has a width dimension that is larger than the width dimension of the airbag assembly, and a length dimension that can cover the airbag assembly over substantially the entire circumference. In the vicinity of one end in the direction, it is composed of a substantially rectangular sheet-like base material in which an insertion hole for inserting the mounting bolt is formed,
The base material is folded in two along the width direction in the vicinity of the center in the length direction, the two edges in the width direction are heat-welded to each other, and the end side in the length direction is opened. Formed into
The airbag assembly is inserted into the wrapping bag from the opening while the mounting bolt protrudes from the insertion hole, and both ends in the length direction of the base material at the periphery of the opening are thermally welded to each other. By
The wrapping bags, the features and to Rue airbag apparatus that covers the entire circumference substantially the airbag assembly body.

Deploying the airbag so that the airbag can be prevented from collapsing around the airbag assembly comprising a folded airbag and an inflator that supplies inflation gas to the airbag. In an airbag device configured to be mounted on a vehicle, covered with a wrapping material that can be broken when inflated,
The wrapping material is heat-weld to each other, formed from a flame retardant sheet material,
The airbag assembly is substantially entirely covered by a wrapping bag formed by thermally welding the wrapping material, and is mounted on a vehicle.
The inflator is
A main body capable of supplying the expansion gas;
A mounting bolt disposed so as to protrude from the main body, and for fixing the airbag assembly to the vehicle;
As a configuration comprising
The sheet material of the wrapping bag has a width dimension that is larger than the width dimension of the airbag assembly, and a length dimension that can cover the airbag assembly over substantially the entire circumference. In the vicinity of one end in the direction, it is composed of a substantially rectangular sheet-like base material in which an insertion hole for inserting the mounting bolt is formed,
The base material is folded in two along the width direction near the center in the length direction, and the airbag assembly is placed in the base material while the mounting bolt protrudes from the insertion hole. By arranging and thermally welding both edges in the length direction of the base material, and both edges in the width direction of the base material,
The wrapping bags, the features and to Rue airbag apparatus that covers the entire circumference substantially the airbag assembly body.

Deploying the airbag so that the airbag can be prevented from collapsing around the airbag assembly comprising a folded airbag and an inflator that supplies inflation gas to the airbag. In an airbag device configured to be mounted on a vehicle, covered with a wrapping material that can be broken when inflated,
The wrapping material is heat-weld to each other, formed from a flame retardant sheet material,
The airbag assembly is substantially entirely covered by a wrapping bag formed by thermally welding the wrapping material, and is mounted on a vehicle.
The inflator is
A main body capable of supplying the expansion gas;
A mounting bolt disposed so as to protrude from the main body, and for fixing the airbag assembly to the vehicle;
As a configuration comprising
The sheet material of the wrapping bag is
A substantially rectangular sheet-shaped first base material having a width dimension larger than a width dimension of the airbag assembly and a length dimension larger than a length dimension of the airbag assembly;
A second base material that is formed to have substantially the same size as the first base material, and has an insertion hole for inserting the mounting bolt;
Consists of
While the airbag assembly is sandwiched between the first and second base materials, the airbag assembly is inserted between the first and second base materials with the mounting bolt protruding from the insertion hole. By arranging and thermally welding the peripheral edges of the first and second substrates over the entire circumference,
The wrapping bags, the features and to Rue airbag apparatus that covers the entire circumference substantially the airbag assembly body.