JP2010234908A

JP2010234908A - Airbag

Info

Publication number: JP2010234908A
Application number: JP2009083580A
Authority: JP
Inventors: Yasuhiro Kiuchi; 康広木内; Takashi Ueda; 高志植田
Original assignee: Nihon Plast Co Ltd
Current assignee: Nihon Plast Co Ltd
Priority date: 2009-03-30
Filing date: 2009-03-30
Publication date: 2010-10-21

Abstract

<P>PROBLEM TO BE SOLVED: To easily maintain a folded shape of an airbag of a curtain airbag device. <P>SOLUTION: The airbag 1 deploying on a side part of an occupant is folded into a thin and long shape in order to store it in a roof side part of a vehicle. In the airbag 1, a lower side part is wound up in a roll shape to form a gathering part 66, and an upper side part is folded as a surrounding part 65 surrounding part of the gathering part 66. The surrounding part 65 includes a pair of arms 71 and 72. The distal ends of the arms 71 and 72 are adhered to the gathering part 66 with adhesive parts 62 and 63 using a double-faced tape, and the folded shape is maintained. When gas is introduced into the airbag 1, the adhesive parts 62 and 63 are peeled off and separated, and the first arm 71, the second arm 72 and the gathering part 66 are deployed in this order. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、例えば、折り畳まれた状態からガスが導入されて自動車の側部の窓部に沿って展開するエアバッグに関する。 The present invention relates to an airbag that is introduced along a window portion on a side portion of an automobile when gas is introduced from a folded state, for example.

従来、ガスを導入して膨張展開するエアバッグを備えたエアバッグ装置について、自動車の車室の側部のドアの窓部などに沿ってエアバッグを展開するいわゆるカーテンエアバッグ装置が知られている。このようなエアバッグ装置のエアバッグは、通常時は細長く折り畳まれ、窓部の上縁部のルーフサイド部に沿って配置されている。そして、側面衝突や横転（ロールオーバー）などの衝撃を受けた際に、インフレータからガスが供給され、エアバッグが側部の窓部などに沿って上側から下方に膨張展開して、乗員を拘束して保護する。 2. Description of the Related Art Conventionally, an airbag apparatus having an airbag that inflates and deploys by introducing gas is known as a so-called curtain airbag apparatus that deploys an airbag along a window of a door on the side of a vehicle compartment. Yes. The airbag of such an airbag device is normally folded long and is arranged along the roof side portion of the upper edge portion of the window portion. When an impact such as a side collision or rollover (rollover) is received, gas is supplied from the inflator, and the airbag is inflated and deployed from the upper side along the side window and the like to restrain the occupant. And protect.

このようなエアバッグにおいて、細長く折り畳んだ形状を保持するため、折り畳んだエアバッグに筒状のカバー(スリーブ)を被せる構成が知られている（例えば、特許文献１参照。）。この構成では、筒状の治具を用いることにより、作業性良く正確にカバーを被せることができる。 In such an airbag, a configuration is known in which a folded-up airbag is covered with a cylindrical cover (sleeve) in order to maintain an elongated folded shape (see, for example, Patent Document 1). In this configuration, the cover can be accurately covered with good workability by using a cylindrical jig.

また、例えば、エアバッグと同じ長さの生地であるカバー(被包)をエアバッグに縫い付け、エアバッグを折り畳んだ状態で、このカバーでエアバッグを囲んで固定する構成が知られている（例えば、特許文献２参照。）。この構成では、カバーには、破断線が形成され、エアバッグの膨張時に破断線に沿って破断するようになっている。 In addition, for example, a configuration is known in which a cover (wrapping) that is a fabric having the same length as the airbag is sewn to the airbag, and the airbag is folded and surrounded by the cover. (For example, refer to Patent Document 2). In this configuration, a break line is formed in the cover, and the cover breaks along the break line when the airbag is inflated.

特開２００３−２６０９９９号公報（第１−２頁、図１、１６−２１）JP 2003-260999 A (page 1-2, FIG. 1, 16-21) 特表２００５−５１９７９７号公報（第１、７−頁、図１−６Ａ）Japanese translation of PCT publication No. 2005-519797 (first, 7-page, FIG. 1-6A)

上記従来のように、折り畳んだエアバッグの形状を保持するカバーを用いる構成では、エアバッグと同様の長手寸法の大きいカバーを用いる必要があり、製造コストの低減が容易でない問題を有している。 In the configuration using the cover that holds the shape of the folded airbag as in the conventional case, it is necessary to use a cover having a large longitudinal dimension similar to the airbag, and there is a problem that it is not easy to reduce the manufacturing cost. .

本発明は、このような点に鑑みなされたもので、折り畳み形状を容易に保持できるエアバッグを提供することを目的とする。 This invention is made | formed in view of such a point, and it aims at providing the airbag which can hold | maintain a folding shape easily.

請求項１記載のエアバッグは、展開基部及びこの展開基部に連続する展開先端部を備え、折畳状態から前記展開基部及び前記展開先端部に順次ガスが供給されて展開するエアバッグであって、折畳状態で、前記展開先端部が集積して折り畳まれた集積部と、前記集積部の少なくとも一部を包んで前記展開基部が折り畳まれた包囲部と、前記包囲部をこの包囲部の他の部分及び前記集積部の少なくとも一方と剥離可能に接合した接合部とを具備するものである。 The airbag according to claim 1 is an airbag that includes a deployment base and a deployment tip that is continuous with the deployment base, and is deployed by sequentially supplying gas from the folded state to the deployment base and the deployment tip. A folded portion in which the unfolded leading end portions are stacked and folded; a surrounding portion in which the unfolding base portion is folded so as to surround at least a part of the unfolding portion; and It comprises a joining part that is detachably joined to at least one of the other part and the integrated part.

請求項２記載のエアバッグは、請求項１記載のエアバッグにおいて、包囲部は、集積部を包むように延設された一対の腕部を備え、これら腕部は、平板状とした展開基部を折り返して形成され、接合部は、これら腕部と集積部とを接合するものである。 The airbag according to claim 2 is the airbag according to claim 1, wherein the surrounding portion includes a pair of arm portions extending so as to wrap the accumulation portion, and the arm portions have a flat deployment base. It is formed by folding back, and the joint portion joins the arm portion and the accumulation portion.

請求項３記載のエアバッグは、請求項１記載のエアバッグにおいて、包囲部は、展開基部内の所定位置から互いに反対側に向かい集積部を包むように延設された一対の腕部を備え、接合部は、これら腕部と集積部とを接合するものである。 The airbag according to claim 3 is the airbag according to claim 1, wherein the surrounding portion includes a pair of arm portions extending so as to wrap the accumulation portion toward a side opposite to each other from a predetermined position in the deployment base portion, The joint portion joins these arm portions and the accumulation portion.

請求項４記載のエアバッグは、請求項１ないし３いずれか一記載のエアバッグにおいて、基布部を重ねて構成される扁平な袋状をなし、車両の車室のルーフサイド部に沿って細長く折り畳んで配置され、ガスが供給されて前記車室の側部に沿って面状に展開し、接合部は、前記基布部にこの基布部の長手方向に沿って設けられた接着手段で構成されるものである。 According to a fourth aspect of the present invention, the airbag according to any one of the first to third aspects has a flat bag shape configured by overlapping the base fabric portion, and extends along a roof side portion of a vehicle compartment. An elongate and folded arrangement, gas is supplied and expands into a plane along the side of the passenger compartment, and a joint is provided on the base cloth along the longitudinal direction of the base cloth. It is comprised by.

請求項１記載のエアバッグによれば、エアバッグの展開基部にガスが導入されると、この展開基部が展開する力により、接合部で接合した部分が剥離して離反するとともに展開基部を折り畳んだ包囲部が展開し、展開先端部を折り畳んだ集積部が開放される。そして、展開基部から展開先端部にガスが導入されて集積部が展開するとの所望の展開特性を実現できる。エアバッグの一部で他の部分を包んで折り畳むとともに、エアバッグ同士を剥離可能に接合する構成により、エアバッグの折畳形状を容易に保持できる。折り畳んだエアバッグの形状を保持する別部材を削減あるいは省略でき、製造コストを低減できる。 According to the airbag according to claim 1, when gas is introduced into the deployment base of the airbag, a force joined by the deployment base peels and separates the joined portion at the joined portion and folds the deployed base. The surrounding portion is unfolded, and the stacking portion where the unfolding tip is folded is opened. And the desired expansion | deployment characteristic that gas is introduce | transduced from the expansion | deployment base to the expansion | deployment front-end | tip part, and an accumulation | stacking part expand | deploys is realizable. While the airbag is partly wrapped with other portions and folded, the airbag can be easily folded so that the airbag can be folded. The separate member that holds the shape of the folded airbag can be reduced or omitted, and the manufacturing cost can be reduced.

請求項２記載のエアバッグによれば、請求項１記載の効果に加え、包囲部の一対の腕部で集積部を包み、接合部でこれら腕部と集積部とを接合することにより、折り畳んだエアバッグの形状を保持できる。エアバッグの展開基部にガスを導入すると、腕部の部分にガスが順次供給され、折り返された腕部が順次復帰変形するように展開しながら集積部の展開方向を案内することができる。 According to the airbag of the second aspect, in addition to the effect of the first aspect, the integrated portion is wrapped by the pair of arm portions of the surrounding portion, and the arm portion and the integrated portion are joined by the joint portion, thereby being folded. It can hold the shape of the airbag. When gas is introduced into the deployment base portion of the airbag, the gas is sequentially supplied to the arm portion, and the deployment direction of the stacking portion can be guided while the folded arm portion is deployed so as to sequentially return and deform.

請求項３記載のエアバッグによれば、請求項１記載の効果に加え、包囲部の一対の腕部で集積部を包み、接合部でこれら腕部と集積部とを接合することにより、折り畳んだエアバッグの形状を保持できる。エアバッグの展開基部にガスを導入すると、所定位置から一対の腕部にガスが同時に導入され、これら一対の腕部が同時に展開しながら集積部の展開方向を案内することができる。 According to the airbag of the third aspect, in addition to the effect of the first aspect, the stacking portion is wrapped by the pair of arm portions of the surrounding portion, and the arm portion and the stacking portion are joined by the joint portion, thereby folding the airbag. It can hold the shape of the airbag. When the gas is introduced into the deployment base of the airbag, the gas is simultaneously introduced into the pair of arms from a predetermined position, and the deployment direction of the stacking unit can be guided while these pairs of arms are deployed simultaneously.

請求項４記載のエアバッグによれば、請求項１ないし３いずれか一記載の効果に加え、車両の車室のルーフサイド部に沿って配置される長手寸法の大きいエアバッグについて、基布部の長手方向に沿って接着手段を設ける簡略な構成でエアバッグの折畳形状を容易に保持できる。 According to the airbag according to claim 4, in addition to the effect according to any one of claims 1 to 3, the base fabric portion of the airbag having a large longitudinal dimension disposed along the roof side portion of the vehicle cabin. The folded shape of the airbag can be easily held with a simple configuration in which the bonding means is provided along the longitudinal direction of the airbag.

本発明のエアバッグの一実施の形態を示す折畳状態の断面図である。It is sectional drawing of the folding state which shows one Embodiment of the airbag of this invention. 同上エアバッグの平面状に広げた状態の車外側から見た側面図である。It is the side view seen from the vehicle outside of the state which spread the air bag same as the above. 同上エアバッグの平面状に広げた状態の車内側から見た側面図である。It is the side view seen from the vehicle inside of the state which spread the air bag same as the above. 本発明のエアバッグの他の実施の形態を示す折畳状態の断面図である。It is sectional drawing of the folding state which shows other embodiment of the airbag of this invention.

以下、本発明のエアバッグの一実施の形態を図面を参照して説明する。 Hereinafter, an embodiment of an airbag according to the present invention will be described with reference to the drawings.

図１ないし図３において、１はエアバッグで、このエアバッグ１を備えたエアバッグ装置は、カーテンエアバッグ装置とも呼ばれるもので、車両である自動車の車体の車室の収納位置であるドアのガラスの上縁部のルーフサイド部に配置されている。そして、このエアバッグ１は、カーテンエアバッグ、側突用エアバッグ、インフレータブルカーテン、あるいは頭部保護用エアバッグなどとも呼ばれるもので、側面衝突の衝撃を受けた際や横転（ロールオーバー）の際などに、被保護物としての乗員の側方にほぼ面状に展開し、乗員を保護するようになっている。 In FIG. 1 to FIG. 3, reference numeral 1 denotes an airbag, and the airbag apparatus provided with the airbag 1 is also called a curtain airbag apparatus, and is a door that is a storage position of a vehicle body of a vehicle that is a vehicle. It is arranged on the roof side of the upper edge of the glass. The airbag 1 is also called a curtain airbag, a side-impact airbag, an inflatable curtain, or a head protection airbag. The airbag 1 is subjected to a side collision impact or rollover. For example, it is developed in a substantially planar shape on the side of the occupant as the object to be protected to protect the occupant.

なお、以下、前後方向、車幅方向である両側方向、上下方向などの方向は、車両の直進方向を基準とし、前側方向（図２及び図３に示す矢印Ｆ方向）、上方（図１ないし図３に示す矢印Ｕ方向）、外方（図１に示す矢印Ｗ方向）などを説明する。 In the following description, directions such as the front-rear direction, the vehicle width direction, the both-side direction, the up-down direction, etc. are based on the straight direction of the vehicle, and the front side direction (the direction of arrow F shown in FIGS. The direction (arrow U direction shown in FIG. 3), the outside (arrow W direction shown in FIG. 1), and the like will be described.

そして、この自動車の車体は、車室内に乗員が着座可能な前席及び後席を備え、これら前席及び後席に対応して、それぞれ上部に開口可能な開口部としての所定面を構成する窓部（サイドウィンドウ）を備えたドアが設けられている。また、車室の両側には、前側から順に、Ａピラーとも呼ばれるフロントピラー、Ｂピラーとも呼ばれる図示しないセンターピラー、Ｃピラーとも呼ばれるリアピラーが設けられている。そして、これら窓部、ドア及び各ピラーにより、車室の両側部に所定面が構成されている。また、これらピラーの上側、すなわち窓部の一縁部である上縁部に、ルーフサイドレールなどとも呼ばれる被設置部を構成する車体パネルが設けられ、この車体パネルを介して天井部としての天井パネルが支持されている。また、両側のフロントピラーの前側にはフロントガラス（フロントウインドシールド）が設けられ、両側のリアピラーの後側にはリアガラスが設けられている。そして、ルーフサイド部は、天井パネルの両側の縁部の部分から、この縁部の部分といわば交差する方向に伸びるフロントピラー及びリアピラーのほぼ全長にかかる部分にまで設定され、これら天井パネルの縁部の部分とフロントピラー及びリアピラーとで仮想的に構成される弧の内側に、エアバッグ１が展開する所定面が設定される。なお、車両の種類によっては、片側に例えば４本以上のピラーを備える場合があるが、前から３本目以後のピラーは、リアピラーとして説明する。 The vehicle body includes a front seat and a rear seat in which a passenger can be seated in a passenger compartment, and each of the front seat and the rear seat corresponds to the front seat and the rear seat, and constitutes a predetermined surface as an opening that can be opened upward. A door provided with a window (side window) is provided. Further, on both sides of the passenger compartment, a front pillar called A pillar, a center pillar (not shown) called B pillar, and a rear pillar called C pillar are provided in order from the front side. And the predetermined surface is comprised by the both sides of the compartment by these window parts, doors, and each pillar. In addition, a vehicle body panel constituting an installation portion called a roof side rail or the like is provided on the upper side of these pillars, that is, the upper edge portion that is one edge portion of the window portion, and a ceiling as a ceiling portion is provided via the vehicle body panel. Panel is supported. A front glass (front windshield) is provided on the front side of the front pillars on both sides, and a rear glass is provided on the rear side of the rear pillars on both sides. The roof side part is set from the edge part on both sides of the ceiling panel to the part covering almost the entire length of the front pillar and the rear pillar extending in a direction intersecting with the edge part. A predetermined plane on which the airbag 1 is deployed is set on the inner side of an arc virtually formed by the portion, the front pillar, and the rear pillar. Depending on the type of vehicle, for example, four or more pillars may be provided on one side, but the third and subsequent pillars from the front will be described as rear pillars.

そして、エアバッグ装置は、前後の座席の乗員を保護可能な、いわゆる前後席用エアバッグであり、車体パネルとヘッドライニングとなどに囲まれたルーフサイド部すなわち車体のドア開口部の上縁に沿って細長く折り畳んで収納されたエアバッグ１と、後席の後方あるいは上方に収納されこのエアバッグ１にガスを供給するガス発生器であるインフレータとなどを備えている。さらに、このエアバッグ装置は、エアバッグ装置を車体パネルに取り付ける図示しない取付ブラケット、及び、折り畳んだエアバッグ１に沿って取り付けられて展開時にエアバッグ１を保護する保護体としてのプロテクタなどが組み合わされ、モジュールとしてルーフサイド部に設置可能になっている。 The airbag device is a so-called front / rear seat airbag that can protect passengers in the front and rear seats, and is located on the roof side portion surrounded by the vehicle body panel and the head lining, that is, on the upper edge of the door opening of the vehicle body. The airbag 1 is housed by being folded along an elongated side, and an inflator that is housed behind or above the rear seat and supplies gas to the airbag 1. Further, this airbag device is a combination of a mounting bracket (not shown) for attaching the airbag device to the vehicle body panel, a protector as a protector that is attached along the folded airbag 1 and protects the airbag 1 when deployed. It can be installed on the roof side as a module.

そして、エアバッグ１は、カーテンエアバッグとも呼び得るもので、単数あるいは複数の基布を組み合わせ、例えば１枚の基布を折り返し、あるいは２枚の基布を重ねて接合して、扁平な袋状に形成されたエアバッグ本体部30と、このエアバッグ本体部30の複数カ所から延設された取付部を構成する取付片部31と、エアバッグ本体部30の前端部に連結されたテザーベルト32となどを備え、細長く折り畳んでルーフサイド部に収納される。 The airbag 1 can also be called a curtain airbag. A single or a plurality of base fabrics are combined, for example, one base fabric is folded, or two base fabrics are overlapped and joined to form a flat bag. Air bag main body 30 formed in a shape, mounting piece 31 constituting a mounting portion extending from a plurality of locations of the air bag main body 30, and a tether belt connected to the front end of the air bag main body 30 32 and so on, folded into a long and narrow shape and stored in the roof side.

そして、エアバッグ本体部30は、車室側に配置される内側の基布部33と、車体側である外側に配置される外側の基布部34とを重ね、これら基布部33，34を連結接合部である所定の縫製部で縫い合わせ、ガスが流入して膨張展開する袋状の膨張部35と、エアバッグ本体部30の後端上部などに位置して膨張部35を外部に連通するガス導入部36と、ガスが流入せず膨張展開しない非膨張部37となどが設けられている。 The airbag main body 30 has an inner base fabric portion 33 disposed on the vehicle interior side and an outer base fabric portion 34 disposed on the outer side which is the vehicle body side, and these base fabric portions 33 and 34 are overlapped. The bag-like inflatable part 35 that is inflated and deployed by gas flowing in, and the upper part of the rear end of the airbag main body 30, etc. are communicated to the outside. There are provided a gas introducing portion 36 for performing the operation, a non-expanding portion 37 for preventing gas from flowing in and expanding and the like, and the like.

そして、膨張部35は、中空部を構成する気室であり、仮想的に設定される水平な線Ａにより上下に区画され、この線Ａより上側が上流側である展開基部38、この線Ａより下側が下流側である展開先端部39となっている。さらに、この膨張部35は、縫製部により区画され、図２及び図３に示すように、ガス案内部40、第１の主膨張部41、第２の主膨張部42、第１の副膨張部44、第２の副膨張部45、及び第３の副膨張部46を備えている。 The inflating portion 35 is an air chamber that forms a hollow portion, and is vertically divided by a horizontal line A that is virtually set, and a deployment base 38 that is upstream from the line A, this line A The lower side is a deployment tip 39 that is the downstream side. Further, the inflating portion 35 is partitioned by a sewing portion, and as shown in FIGS. 2 and 3, the gas guide portion 40, the first main inflating portion 41, the second main inflating portion 42, and the first sub-inflating. Part 44, second sub-expansion part 45, and third sub-expansion part 46.

そして、ガス案内部40は、ほぼ全体が展開基部38に位置するとともに、ガス導入部36に直接的に連通し、エアバッグ本体部30の上縁部に沿って前後方向を長手方向として直線状に設けられ、すなわち前後方向を長手方向である軸方向として略水平な柱状に展開する。このガス案内部40は、本実施の形態では、エアバッグ本体部30の前端部には形成されず、また、後端部にガス導入部36が連通している。 The gas guide part 40 is located almost entirely on the deployment base 38, communicates directly with the gas introduction part 36, and forms a straight line with the longitudinal direction as the longitudinal direction along the upper edge of the airbag body part 30. That is, it expands in a substantially horizontal columnar shape with the front-rear direction as the axial direction which is the longitudinal direction. In the present embodiment, the gas guide portion 40 is not formed at the front end portion of the airbag main body portion 30, and the gas introduction portion 36 communicates with the rear end portion.

また、第１の主膨張部41は、ガス案内部40の下流側である前側に連通し、展開時に前席の乗員の側方に対向して展開する前席保護部となっている。また、第２の主膨張部42は、ガス案内部40の上流側である後側に連通し、展開時に後席の乗員の側方に対向して展開する後席保護部となっている。 The first main expansion part 41 is a front seat protection part that communicates with the front side, which is the downstream side of the gas guide part 40, and that develops facing the side of the front seat occupant during deployment. The second main expansion portion 42 is a rear seat protection portion that communicates with the rear side, which is the upstream side of the gas guide portion 40, and that develops facing the occupant side of the rear seat when deployed.

さらに、第１の副膨張部44は、第１のベント部51を介して第１の主膨張部41の前側に連通し、展開時に前席の乗員の側方よりさらに前方に位置して展開可能となっている。また、第２の副膨張部45は、第２のベント部52を介して第１の主膨張部41の後側に連通し、展開時に前席の乗員の側方より後方に位置して展開可能となっている。さらに、第３の副膨張部46は、第３のベント部53を介して第２の主膨張部42の前側に連通し、展開時に後席の乗員の側方より前方に位置して展開可能となっている。 Further, the first sub-inflating portion 44 communicates with the front side of the first main inflating portion 41 via the first vent portion 51, and is deployed further forward than the side of the front seat occupant during deployment. It is possible. The second sub-inflatable portion 45 communicates with the rear side of the first main inflatable portion 41 via the second vent portion 52 and is deployed rearward from the side of the front seat occupant during deployment. It is possible. Further, the third sub-inflating portion 46 communicates with the front side of the second main inflating portion 42 via the third vent portion 53, and can be deployed in front of the side of the rear seat occupant when deployed. It has become.

また、縫製部は、縫製、接着、あるいは縫製とシール手段との併用などにより略気密あるいは高度な気密に構成され、膨張部35の外周を縫製する外周連結部である外周縫製部55と、この外周縫製部55に囲まれた領域に位置し各主膨張部41，42および各副膨張部44，45，46などを区画形成するとともに各部の展開時の幅寸法を規制する規制部56とを備えている。そして、この規制部56は、外周縫製部55と一体あるいは別体に形成され、線状をなす線部と、この線部の端末などに位置して線部を保護する円環状の保護部が形成されている。 Further, the sewing portion is configured to be substantially airtight or highly airtight by sewing, bonding, or a combination of sewing and sealing means, and an outer periphery sewing portion 55 that is an outer periphery connecting portion for sewing the outer periphery of the inflating portion 35. A regulating portion 56 that is located in a region surrounded by the outer circumferential sewing portion 55 and that defines the main inflating portions 41, 42 and the sub inflating portions 44, 45, 46, etc., and regulates the width of each portion when deployed; I have. The restricting portion 56 is formed integrally with or separately from the outer peripheral sewing portion 55, and includes a linear line portion and an annular protective portion that is positioned at the end of the line portion and protects the line portion. Is formed.

なお、各ベント部51，52，53は、常時開口しているものの、開口面積が小さくスリット状に開口して所定の通気抵抗を発生されるもので、各ベント部51，52，53に連通する各副膨張部44，45，46をいわば内部排気受入部（インターナルベント）として機能させる。また、各ベント部51，52，53の位置は、各主膨張部41，42の下流側の端部である下端部に位置して形成されている。そこで、ガス導入部36からガス案内部40を介して各主膨張部41，42にガスが導入されこれら主膨張部41，42が膨張展開する展開初期には、各副膨張部44，45，46には、全くあるいはほとんどガスが導入されず、膨張しないようになっている。 Although each vent 51, 52, 53 is always open, it has a small opening area and is opened like a slit to generate a predetermined ventilation resistance, and communicates with each vent 51, 52, 53. The sub-expanding portions 44, 45, and 46 function as internal exhaust receiving portions (internal vents). The positions of the vent portions 51, 52, 53 are formed at the lower end portions that are the downstream end portions of the main expansion portions 41, 42. Therefore, at the initial stage of expansion when the gas is introduced from the gas introduction part 36 to the main expansion parts 41 and 42 via the gas guide part 40 and the main expansion parts 41 and 42 are inflated and deployed, the sub-expansion parts 44, 45, No or little gas is introduced into 46 so that it does not expand.

また、内側の基布部と外側の基布部との間には、必要に応じて、ガスを案内し、あるいは、膨張展開時の膨張部の幅寸法を規制する手段として、基布を筒状としたインナパイプ58や、内側の基布部33と外側の基布部34とを連結する基布である隔壁体などが縫合などして取り付けられている。また、この実施の形態では、エアバッグ本体部30の上端部の前端部及び後端部の下端部にそれぞれ若干の非膨張部37が形成され、前側の非膨張部37には、車体などに取り付けられる固定点59が形成されている。 Further, between the inner base fabric portion and the outer base fabric portion, the base fabric can be used as a means for guiding gas or restricting the width of the inflated portion when inflated and deployed as necessary. An inner pipe 58 and a partition body, which is a base fabric that connects the inner base fabric portion 33 and the outer base fabric portion 34, are attached by sewing or the like. Further, in this embodiment, a slight non-inflatable portion 37 is formed at each of the front end portion of the upper end portion and the lower end portion of the rear end portion of the airbag body portion 30, and the front non-inflatable portion 37 is attached to the vehicle body or the like. A fixing point 59 to be attached is formed.

また、エアバッグ１の取付片部31は、車体取付用の取付片であり、エアバッグ本体部30の上縁部の所定位置に複数形成されている。そして、各取付片部31は、エアバッグ本体部30を構成する基布部と一体に形成され、例えば、内側の基布部33と外側の基布部34とを重ね縫着して形成されている。そして、各取付片部31は、エアバッグ本体部30から舌片状に突設され、円孔状をなす取付孔31aが形成されている。 The attachment piece 31 of the airbag 1 is an attachment piece for attaching the vehicle body, and a plurality of attachment pieces 31 are formed at predetermined positions on the upper edge of the airbag main body 30. Each attachment piece 31 is formed integrally with the base fabric portion constituting the airbag main body 30, and is formed, for example, by overlapping and sewing the inner base fabric portion 33 and the outer base fabric portion 34. ing. Each attachment piece 31 protrudes from the airbag body 30 in a tongue-like shape, and an attachment hole 31a having a circular hole shape is formed.

次に、このエアバッグ１の折畳工程及び折畳形状を説明する。 Next, the folding process and folding shape of the airbag 1 will be described.

概略としては、エアバッグ１は、図２及び図３に示すように、内側の基布部33と外側の基布部34とを重ねて平面状に広げた状態から、エアバッグ１の両面の所定の領域に接合部としての第１ないし第３の接着部61，62，63を形成するとともに、図１に示すように、線Ａより上側の展開基部38を折り畳んで包囲部65を形成し、線Ａより下側の展開先端部39をロール状に折り畳んで集積部66を形成し、包囲部65で集積部66の少なくとも一部を、ここでは少なくとも上側部から両側部までの一部を包み、いわば抱えるように囲んだ状態で、エアバッグ本体部30が所定の細長い形状に折り畳まれ、第１ないし第３の接着部61，62，63を用いて基布部33，34同士を接着して折り畳み形状を保持するものである。 As an outline, as shown in FIG. 2 and FIG. 3, the airbag 1 is formed on the both sides of the airbag 1 from a state in which the inner base fabric portion 33 and the outer base fabric portion 34 are overlapped and spread in a planar shape. First to third bonding portions 61, 62, and 63 are formed as bonding portions in a predetermined region, and as shown in FIG. 1, a deployment base portion 38 above line A is folded to form a surrounding portion 65. , The development tip 39 below the line A is folded into a roll shape to form the accumulation portion 66, and at least a part of the accumulation portion 66 is formed by the surrounding portion 65, and here at least a part from the upper side portion to both side portions is formed. The airbag body 30 is folded into a predetermined elongate shape in a state where it is wrapped and held, so to speak, and the base fabric portions 33 and 34 are bonded together using the first to third bonding portions 61, 62, and 63. Thus, the folded shape is maintained.

より詳細には、集積部66は、エアバッグ本体部30を下流側の端部である下端部39aから車外側すなわち所定面側に巻き上げるように巻回して形成されている。 More specifically, the stacking portion 66 is formed by winding the airbag main body 30 so as to wind up from the lower end portion 39a, which is the downstream end portion, to the vehicle exterior side, that is, the predetermined surface side.

また、包囲部65は、線Ａに平行すなわち互いに平行な複数の折り線Ｂ1，Ｂ2に沿って、互いに重ねられた基布部33，34が一体に折り返され、一対の腕部71，72が形成されている。そして、上側の折り線Ｂ1は、車室内側に向くように折り返され、すなわち車室内側に向かうようにして上流側の折畳部である第１の腕部71が形成されている。また、下側の折り線Ｂ2は、車室外側に向くように折り返され、すなわち車室外側に向かうようにして下流側の折畳部である第２の腕部72が形成されている。 In addition, the surrounding portion 65 is formed by folding back the base fabric portions 33 and 34 that are overlapped with each other along a plurality of folding lines B1 and B2 that are parallel to the line A, that is, parallel to each other. Is formed. The upper fold line B1 is folded back toward the vehicle interior side, that is, the first arm portion 71 as the upstream fold portion is formed toward the vehicle interior side. Further, the lower fold line B2 is folded back toward the outside of the passenger compartment, that is, a second arm portion 72 as a downstream fold portion is formed so as to face the outer side of the passenger compartment.

また、第１ないし第３の接着部61，62，63は、基布部33，34同士をエアバッグ１の展開時の圧力で結合解除すなわち剥離可能に接着して折畳形状を保持するもので、エアバッグ１の長手方向に沿って両面粘着テープとも呼ばれる接着手段としての両面テープを互いに平行に基布部33，34に接着して形成されている。 The first to third adhesive portions 61, 62, and 63 hold the folded shape by bonding the base fabric portions 33 and 34 to each other with the pressure at the time of deployment of the airbag 1 so that they can be released from each other. Thus, a double-sided tape, which is also referred to as a double-sided adhesive tape, is bonded to the base cloth portions 33 and 34 in parallel with each other along the longitudinal direction of the airbag 1.

そして、第１の接着部61は、上端部近傍に沿って外側の基布部34同士を接着し、折り返された第１の腕部71の形状を保持し、一対の第１の接着部61，61同士の中間位置に、上側の折り線Ｂ1が位置している。 And the 1st adhesion part 61 adhere | attaches the outer base fabric parts 34 along upper end vicinity, hold | maintains the shape of the folded 1st arm part 71, and a pair of 1st adhesion part 61 , 61 is located at an intermediate position between the upper fold lines B1.

そして、第２の接着部62は、上側の折り線Ｂ1に沿って、すなわち第１の腕部71の先端部に沿って内側の基布部33同士を接着し、第１の腕部71の先端部を集積部66に接着している。 The second adhesive portion 62 adheres the inner base fabric portions 33 to each other along the upper fold line B1, that is, along the distal end portion of the first arm portion 71. The front end portion is bonded to the accumulation portion 66.

さらに、第３の接着部63は、下側の折り線Ｂ2に沿って、すなわち第２の腕部72の先端部に沿って内側の基布部33と外側の基布部34とを接着し、第２の腕部72の先端部を集積部66に接着している。 Further, the third bonding portion 63 bonds the inner base fabric portion 33 and the outer base fabric portion 34 along the lower fold line B2, that is, along the distal end portion of the second arm portion 72. The distal end portion of the second arm portion 72 is bonded to the accumulation portion 66.

この状態で、集積部66は、上側から両側にかかる部分が包囲部65の一対の腕部71，72で包まれるとともに、第２の接着部62と第３の接着部63との間のいわばが開いた部分は、集積部66を構成する基布部33，34が張った状態となり、集積部66の形状が保持される。 In this state, the stacking portion 66 is covered by the pair of arms 71 and 72 of the surrounding portion 65 at the both sides from the upper side, and is the so-called portion between the second adhesive portion 62 and the third adhesive portion 63. In the opened portion, the base cloth portions 33 and 34 constituting the stacking portion 66 are stretched, and the shape of the stacking portion 66 is maintained.

このようにして、エアバッグ１が細長く折り畳まれ、かつ、折畳形状が保持された状態となる。 In this way, the airbag 1 is folded into an elongated shape and the folded shape is maintained.

なお、図２及び図３に示す接着部61，62，63は、それぞれ基布部33，34が互いに接着される領域を示しており、製造工程においては、エアバッグ１を平面状とした状態で、同じ符号を付した領域のいずれかに両面テープの一面が接着され、剥離紙を剥がした後、エアバッグ１の包囲部65及び集積部66を形成する折畳工程で領域の他方に両面テープの他面が接着される。 2 and FIG. 3 show areas where the base fabric parts 33 and 34 are bonded to each other, and the airbag 1 is in a flat state in the manufacturing process. Then, after one surface of the double-sided tape is adhered to one of the regions with the same reference numerals and the release paper is peeled off, both sides of the two regions are applied to the other region in the folding process of forming the envelope portion 65 and the stacking portion 66 of the airbag 1. The other side of the tape is glued.

剥離紙は、折畳工程に入る前に剥す他、剥離紙を付けた状態で折畳み、適宜仮保持治具で折畳形状が崩れないように置き、剥離紙のエアバッグ１における端末部分から引き抜くようにして剥し、折畳まれたエアバッグ１を再押圧するようにしてもよい。すなわち、図１の第１の接着部61にあっては、剥離紙の端末を図１の右方向に引きながら長手方向全体に亘り剥離紙を剥すようにしてもよい。第２及び第３の接着部62，63にあっては、図１の下方に同様の操作を行い、剥離紙を剥すことができる。この剥離紙の剥離は、エアバッグ１全体の折畳工程が完了した後の工程とすることもできるし、腕部71，72などの各折畳工程毎に、剥す操作を行いながら折り進めることもできる。 The release paper is peeled off before entering the folding process, is folded with the release paper attached, is placed with a temporary holding jig as appropriate so that the folded shape is not collapsed, and is pulled out from the terminal portion of the airbag 1 of the release paper. Thus, the peeled and folded airbag 1 may be pressed again. That is, in the first adhesive portion 61 of FIG. 1, the release paper may be peeled over the entire longitudinal direction while pulling the release paper terminal in the right direction of FIG. In the second and third adhesive portions 62 and 63, the same operation can be performed in the lower part of FIG. 1 to peel off the release paper. The separation of the release paper can be performed after the folding process of the entire airbag 1 is completed, or the folding process can be performed while performing the peeling operation for each folding process of the arms 71 and 72 and the like. You can also.

そして、上記のように折り畳まれたエアバッグ１について、リベットなどを用いてプロテクタ及び取付ブラケットを取り付けるとともに、エアバッグ１の後端部のガス導入部36にインフレータの円柱状の本体部分から延びる接続管を接続し、カーテンエアバッグモジュールとなるエアバッグ装置を構成する。 And about the airbag 1 folded as mentioned above, while attaching a protector and a mounting bracket using a rivet etc., the connection extended from the cylindrical main-body part of an inflator to the gas introduction part 36 of the rear-end part of the airbag 1 The tube is connected to constitute an airbag device to be a curtain airbag module.

そして、このエアバッグ装置を車室内に持ち込み、ヘッドライニング及びピラーガーニッシュなどの内装部材が取り付けられる前に車体への取付作業を行う。この取付作業は、エアバッグ１の複数の取付片部31、固定点59、テザーベルト32、インフレータに設けた取付部、及び、エアバッグ１及びプロテクタを取り付けた取付ブラケットをそれぞれボルトなどの固定具で車体に固定することにより行われる。また、インフレータから導出されたハーネスを車体に備えた制御装置に接続する。次いで、車体の天井パネルにヘッドライニングを取り付け、各ピラーにピラーガーニッシュを取り付けてエアバッグ装置を覆うことにより、エアバッグ装置の車体への取付作業が完了する。また、この取付状態で、軟質のヘッドライニングの縁部は、折畳状態のエアバッグ１を開放可能に覆うカバーとなる。 Then, the airbag device is brought into the vehicle interior, and the attachment work to the vehicle body is performed before the interior members such as the head lining and the pillar garnish are attached. The attachment work is performed by fixing a plurality of attachment pieces 31 of the airbag 1, a fixing point 59, a tether belt 32, an attachment portion provided on the inflator, and an attachment bracket to which the airbag 1 and the protector are attached with a fixing tool such as a bolt. This is done by fixing to the car body. Moreover, the harness led out from the inflator is connected to a control device provided in the vehicle body. Next, the headlining is attached to the ceiling panel of the vehicle body, the pillar garnish is attached to each pillar, and the airbag device is covered, thereby completing the operation of attaching the airbag device to the vehicle body. Further, in this attached state, the edge of the soft head lining serves as a cover that covers the folded airbag 1 in a releasable manner.

次に、エアバッグ１の展開動作を説明する。 Next, the deployment operation of the airbag 1 will be described.

車両の側面衝突あるいは横転などの際には、制御装置によりインフレータが作動し、このインフレータから噴射されるガスが接続管を介しガス導入部36からエアバッグ本体部30内の膨張部35に導入される。すると、膨張部35は、包囲部65の第１の腕部71、包囲部65の第２の腕部72、集積部66の順でガスが供給されて順次展開し、エアバッグ１が車室の側部に沿って面状に膨張展開して乗員を保護する。 In the event of a side collision or rollover of the vehicle, the inflator is actuated by the control device, and the gas injected from the inflator is introduced from the gas introduction part 36 into the inflating part 35 in the airbag main body 30 via the connecting pipe. The Then, the inflating part 35 is supplied with gas in the order of the first arm part 71 of the enclosing part 65, the second arm part 72 of the enclosing part 65, and the accumulating part 66 in order, and the airbag 1 is deployed in the passenger compartment. The passengers are protected by inflating and deploying in a planar shape along the side of the vehicle.

より詳細には、まず、エアバッグ１にガス導入部36からガスが供給されると、このガスは、図２及び図３に示す側面視ではガス案内部40に沿って第１の副膨張部44の部分を除き膨張部35の前後方向の略全長に供給され、すなわち、エアバッグ１の略全長で同様に展開が開始される。そして、図１に示す正面視では、まず、包囲部65の第１の腕部71にガスが供給され、第１の接着部61及び第２の接着部62が順次剥離して離反するとともに、上側の折り線Ｂ1でいわば略Ｕ字状に折り返した第１の腕部71が復帰変形するように膨張展開する。ここで、膨張展開する第１の腕部71がカバーであるヘッドライニングを押しのけるとともに、第１の腕部71が開くように復帰変形する挙動により集積部66が車室内に向かうように展開方向いわば打ち出し方向を案内する。 More specifically, first, when a gas is supplied to the airbag 1 from the gas introduction unit 36, the gas flows along the gas guide unit 40 in the side view shown in FIGS. Except for the portion 44, the inflatable portion 35 is supplied to substantially the entire length in the front-rear direction. In the front view shown in FIG. 1, first, gas is supplied to the first arm portion 71 of the surrounding portion 65, and the first adhesive portion 61 and the second adhesive portion 62 are sequentially separated and separated, The first arm 71 folded back in a substantially U shape at the upper fold line B1 expands and develops so as to return and deform. Here, the first arm portion 71 that is inflated and deployed pushes away the head lining that is a cover, and the deployment direction is so-called so that the accumulation portion 66 is directed toward the vehicle interior by the behavior of returning and deforming so that the first arm portion 71 opens. Guide the launch direction.

次いで、第１の腕部71を介して、第２の腕部72にガスが供給される。すると、第３の接着部63が剥離するとともに、下側の折り線Ｂ2でいわば略Ｕ字状に折り返した第２の腕部72が開くように復帰変形する挙動により、集積部66を車外側に向かうように案内する。 Next, the gas is supplied to the second arm portion 72 via the first arm portion 71. Then, the third adhesive portion 63 is peeled off, and the stacking portion 66 is moved to the outside of the vehicle by a behavior of returning and deforming so that the second arm portion 72 folded back in a substantially U shape is opened at the lower fold line B2. Guide you to head towards.

次いで、集積部66が、車室の側部内面である所定面に摺接しつつ巻き戻され、この所定面に沿って略下方にカーテン状に膨張展開して、窓部及びセンターピラーなどを覆う。 Next, the accumulation portion 66 is rewound while being in sliding contact with a predetermined surface which is an inner surface of the side portion of the passenger compartment, and is expanded and deployed in a curtain shape substantially downward along the predetermined surface to cover the window portion, the center pillar, and the like. .

また、この展開過程で、側面視では、膨張部35は、ガス案内部40が後端部から前端部まで迅速に膨張展開するとともに、このガス案内部40から、第１の主膨張部41及び第２の主膨張部42にガスが供給されてこれら主膨張部41，42が前席及び後席の乗員の着座位置の側方に対向する領域に迅速に膨張展開し、乗員を保護する。そして、これら主膨張部41，42の膨張展開が完了した状態で、乗員がエアバッグ１に接触する前の状態では、インフレータから供給されるガスの圧力と各ベント部51，52，53の位置及び通気抵抗との関係で、ガスの下流端かつ下側に位置する各副膨張部44，45，46にはガスは流入せず、平らにつぶれたままで膨張しないいわゆるフラットな状態で展開する。すなわち、エアバッグ１に乗員が接触する以前の展開初期には各副膨張部44，45，46にガスが流入せず、インフレータから供給されるガスを有効に利用し、各主膨張部41，42を迅速に所定の位置に展開させることができる。また、インフレータから供給されるガスを有効に利用できるため、インフレータを小型化することもできる。このように、ガスを導入することにより、エアバッグ１の各主膨張部41，42が車室の側部の所定面に沿って乗員の側方に対向して必要な面積で迅速に展開し、乗員の頭部などを保護できる。 Further, in this development process, in a side view, the inflating portion 35 rapidly expands and deploys the gas guide portion 40 from the rear end portion to the front end portion, and from the gas guide portion 40, the first main inflating portion 41 and Gas is supplied to the second main inflating portion 42, and these main inflating portions 41, 42 are quickly inflated and deployed in the area facing the side of the seating position of the front seat and rear seat occupants to protect the occupants. In the state where the main inflation portions 41 and 42 have been inflated and deployed, and before the occupant comes into contact with the airbag 1, the pressure of the gas supplied from the inflator and the positions of the vent portions 51, 52 and 53 are as follows. In addition, in relation to the ventilation resistance, the gas does not flow into each of the sub-expansion portions 44, 45, 46 located at the downstream end and the lower side of the gas, and develops in a so-called flat state in which the gas remains flat and does not expand. That is, at the initial stage of deployment before the occupant comes into contact with the airbag 1, gas does not flow into each of the secondary inflatable portions 44, 45, 46, but the gas supplied from the inflator is used effectively, 42 can be quickly deployed in place. In addition, since the gas supplied from the inflator can be used effectively, the inflator can be reduced in size. In this way, by introducing the gas, the main inflating portions 41 and 42 of the airbag 1 are rapidly deployed in a necessary area facing the side of the occupant along a predetermined surface of the side portion of the passenger compartment. , Can protect the head of the occupant.

そして、エアバッグ１の展開の後は、側方に投げ出されてくる乗員がエアバッグ１に接触し、各主膨張部41，42のいずれかあるいは両方の内圧が大きくなると、各ベント部51，52，53を介してガスが各副膨張部44，45，46に移動すなわち流入して最大容積まで膨張展開し、エアバッグ１から乗員に対して加わる力が軽減して乗員が保護される。なお、これら各副膨張部44，45，46は、乗員の通常の着座位置からは外れた位置に展開する。また、各主膨張部41，42から各ベント部51，52，53を介してガスが各副膨張部44，45，46に移動しても、ガスがエアバッグ１の膨張部35の外部に放出されないため、エアバッグ１は展開形状を比較的長時間にわたり維持し、横転時（ロールオーバー時）などにも乗員を効果的に保護する。 Then, after the airbag 1 is deployed, when the occupant thrown out to the side comes into contact with the airbag 1 and the internal pressure of one or both of the main inflatable portions 41, 42 increases, the vent portions 51, The gas moves through the sub-inflatable portions 44, 45, and 46 through 52 and 53, that is, inflates and expands to the maximum volume, and the force applied from the airbag 1 to the occupant is reduced to protect the occupant. Each of the sub-inflating portions 44, 45, 46 is deployed at a position deviating from the normal seating position of the occupant. Further, even if the gas moves from the main inflatable portions 41 and 42 to the sub inflatable portions 44, 45 and 46 through the vent portions 51, 52 and 53, the gas is outside the inflatable portion 35 of the airbag 1. Since the airbag 1 is not released, the airbag 1 maintains the deployed shape for a relatively long time, and effectively protects the occupant even during rollover (during rollover).

また、エアバッグ１の展開時には、プロテクタにより、エアバッグ１の車体側及び上側が車体パネルなどとの干渉から保護されるとともに、エアバッグ１の展開方向が案内される。 When the airbag 1 is deployed, the protector protects the vehicle body side and upper side of the airbag 1 from interference with the vehicle body panel and the like, and guides the deployment direction of the airbag 1.

このように、本実施の形態によれば、折畳状態から順次ガスが供給されて展開する展開基部38及び展開先端部39を設けたカーテンエアバッグ装置のエアバッグ１について、展開先端部39が集積して折り畳まれた集積部66を、展開基部38が折り畳まれた包囲部65の一対の腕部71，72で包むように折り畳むとともに、第１の接着部61で第１の腕部71の形状を保持するとともに、各腕部71，72の先端部をそれぞれ集積部66に第２及び第３の接着部62，63で剥離可能に接着して、エアバッグ１の折畳形状を保持している。そこで、エアバッグ１にガスを導入することにより、まず、包囲部65の一対の腕部71，72が展開しながら集積部66をカバーから押し出しつつ所望の方向に案内し、次いで、集積部66にガスを供給して円滑迅速に展開させるという所望の展開特性を容易に実現できるとともに、構造を簡略化して製造コストを低減できる。 As described above, according to the present embodiment, the deployment distal end 39 of the curtain airbag device provided with the deployment base 38 and the deployment distal end 39 that are sequentially supplied with gas and deployed from the folded state is provided. The stacking portion 66 that is stacked and folded is folded so as to be wrapped by the pair of arm portions 71 and 72 of the surrounding portion 65 in which the development base 38 is folded, and the shape of the first arm portion 71 is formed by the first adhesive portion 61. And holding the folded shape of the airbag 1 by adhering the tip portions of the arm portions 71 and 72 to the stacking portion 66 by the second and third adhesive portions 62 and 63, respectively. Yes. Therefore, by introducing gas into the airbag 1, first, the pair of arms 71 and 72 of the surrounding portion 65 are deployed to guide the collecting portion 66 in a desired direction while pushing out from the cover, and then the collecting portion 66. It is possible to easily realize a desired development characteristic of supplying gas to the gas and smoothly and rapidly developing it, and simplifying the structure and reducing the manufacturing cost.

すなわち、エアバッグ１を構成する基布部33，34の一部で他の部分を包んで折り畳むとともに、エアバッグ１の基布部33，34同士を剥離可能に接合するいわば束ね構造により、エアバッグ１の折畳形状を容易に保持できるとともに、剥離可能に接合してエアバッグ１の折り状態を保持する接合部は両面テープにより容易に構成でき、折り畳んだエアバッグの形状を保持するシート状あるいは筒状などの別部材を削減あるいは省略して、製造コストを低減できる。 In other words, a part of the base fabric portions 33 and 34 constituting the airbag 1 is wrapped with other portions and folded, and the base fabric portions 33 and 34 of the airbag 1 are joined in a releasable manner so as to be bundled. The folded shape of the bag 1 can be easily held, and the joined portion that can be peeled and joined to hold the folded state of the airbag 1 can be easily configured with double-sided tape, and is a sheet shape that retains the folded shape of the airbag Alternatively, the manufacturing cost can be reduced by reducing or omitting another member such as a cylindrical shape.

すなわち、ソック、ラッピング材、ラッピングシート、筒状ラッピングなどと呼ばれるカバー部材を量的削減あるいは使用しないとすることができる。そこで、材料費を削減できるとともに軽量化できるのみならず、シート掛けあるいは筒に入れる作業工程を削減して製造コストを低減でき、さらに、筒に入れる作業工程時のエアバッグ１の折りの乱れや捩れ、カバー部材のミシン目などの破断部の確認が不要になる。加えて、エアバッグ１のエアバッグ本体部30がカバー部材に覆われず外部に露出した状態となるため、折りの状態の確認が容易であり、展開挙動を容易に安定させることができる。 That is, a cover member called a sock, a wrapping material, a wrapping sheet, or a cylindrical wrapping can be quantitatively reduced or not used. Therefore, not only can the material cost be reduced and the weight can be reduced, but also the manufacturing process can be reduced by reducing the work process to put in the seat or the cylinder, and further, the folding of the airbag 1 during the work process to put in the cylinder can be reduced. There is no need to check for breaks such as twists and perforations in the cover member. In addition, since the airbag main body 30 of the airbag 1 is not covered with the cover member and is exposed to the outside, it is easy to check the folded state, and the deployment behavior can be easily stabilized.

また、集積部66を包むように延設される包囲部65の一対の腕部71，72は、エアバッグ１のエアバッグ本体部30を平板状につぶした状態で、展開基部38を２カ所の折り線Ｂ1，Ｂ2で折り返して形成できるとともに、接合部を構成する第１ないし第３の接着部61，62，63はこれら折り線Ｂ1，Ｂ2と平行に両面テープを貼るのみで形成でき、製造コストを低減できる。 In addition, the pair of arms 71 and 72 of the surrounding portion 65 extended so as to wrap the stacking portion 66 is formed by flattening the airbag main body 30 of the airbag 1 in a flat plate shape with the deployment base 38 at two locations. The first to third adhesive portions 61, 62, 63 constituting the joint can be formed by simply applying a double-sided tape in parallel with the fold lines B1, B2 and manufactured. Cost can be reduced.

このようにして、車両の車室のルーフサイド部に沿って細長く折り畳んで配置される長手寸法の大きいエアバッグ１について、簡略な構成でエアバッグ１の折畳形状を容易に保持でき、カーテンエアバッグ装置に適したエアバッグ１を提供できる。 In this way, the airbag 1 having a large longitudinal dimension that is arranged in an elongated shape along the roof side portion of the vehicle compartment can easily hold the folded shape of the airbag 1 with a simple configuration, and the curtain air The airbag 1 suitable for the bag device can be provided.

なお、上記の実施の形態では、一対の腕部71，72は、エアバッグ本体部30を平板状にした状態から２カ所の折り線Ｂ1，Ｂ2で折り返し、包囲部65の第１の腕部71、包囲部65の第２の腕部72、集積部66の順でガスが供給される構成としたが、この構成に限られるものではない。 In the above-described embodiment, the pair of arm portions 71 and 72 are folded back at two folding lines B1 and B2 from the state in which the airbag main body 30 is flattened, and the first arm portion of the surrounding portion 65 The gas is supplied in the order of 71, the second arm portion 72 of the surrounding portion 65, and the stacking portion 66, but is not limited to this configuration.

例えば、図４に示す構成では、ガス案内部40に前後方向すなわち長手方向に沿って延びる所定位置としての通気位置80を設定し、この通気位置80から互いに反対方向に向かう一対の腕部81，82を延設するとともに、通気位置80の下側に連通する部分が巻回されてロール状の集積部66が形成される。そして、これら腕部81，82でパラソル状に集積部66を包むとともに、これら腕部81，82の先端部に設けた接合部としての接着部85，86を集積部66に接合ここでは接着手段である両面テープにより接着して、折畳形状を保持している。 For example, in the configuration shown in FIG. 4, a vent position 80 as a predetermined position extending in the front-rear direction, that is, the longitudinal direction is set in the gas guide section 40, and a pair of arms 81, While extending 82, a portion communicating with the lower side of the ventilation position 80 is wound to form a roll-shaped accumulation portion 66. Then, the arm portions 81 and 82 wrap the accumulation portion 66 in a parasol shape, and the bonding portions 85 and 86 as the bonding portions provided at the tip portions of the arm portions 81 and 82 are bonded to the accumulation portion 66. It is adhered by a double-sided tape that holds the folded shape.

そして、この図４に示す構成では、折畳状態のエアバッグ１にガス導入部36からガスが供給されると、このガスは、ガス案内部40の通気位置80に沿って第１の副膨張部44の部分を除き膨張部35の前後方向の略全長に供給され、すなわち、エアバッグ１の略全長で同様に展開が開始される。そして、この構成では、図１に示す構成とは異なり、両側の腕部81，82に同時にガスが供給され、両側の接着部85，86が同時に破断するとともに、両側の腕部81，82が同時に膨張展開する。ここで、膨張展開する両側の腕部81，82により、集積部66が展開方向を案内されつつカバーであるヘッドライニングを押しのけて下方に押し出される。次いで、図１に示す構成と同様に、集積部66が、車室の側部内面である所定面に摺接しつつ巻き戻され、この所定面に沿って略下方にカーテン状に膨張展開して、窓部及びセンターピラーなどを覆う。 In the configuration shown in FIG. 4, when gas is supplied from the gas introduction unit 36 to the airbag 1 in the folded state, the gas is supplied to the first sub-inflation along the ventilation position 80 of the gas guide unit 40. Except for the portion 44, the inflatable portion 35 is supplied to substantially the entire length in the front-rear direction. In this configuration, unlike the configuration shown in FIG. 1, gas is simultaneously supplied to the arm portions 81 and 82 on both sides, the adhesive portions 85 and 86 on both sides are simultaneously broken, and the arm portions 81 and 82 on both sides are It expands and expands at the same time. Here, by the arm portions 81 and 82 on both sides inflating and deploying, the accumulating portion 66 is pushed downward while pushing the head lining as a cover while guiding the unfolding direction. Next, as in the configuration shown in FIG. 1, the stacking portion 66 is rewound while being in sliding contact with a predetermined surface, which is the inner surface of the side of the passenger compartment, and is expanded and deployed in a curtain shape substantially downward along this predetermined surface. Cover the window and center pillar.

このように、図４に示す構成についても、包囲部65の一対の腕部81，82で集積部66を包み、これら腕部81，82を接着部85，86で集積部66に接着する構成により、エアバッグ１の折畳形状を保持できるとともに、ガスの供給時には集積部66の展開方向を案内することができる。 As described above, also in the configuration shown in FIG. 4, the stacking portion 66 is wrapped by the pair of arm portions 81 and 82 of the surrounding portion 65, and the arm portions 81 and 82 are bonded to the stacking portion 66 by the bonding portions 85 and 86. Thus, the folded shape of the airbag 1 can be maintained, and the deployment direction of the accumulating portion 66 can be guided when the gas is supplied.

なお、上記の各実施の形態では、剥離可能な接合部は、接着手段としての両面テープを貼り付けた接着部61，62，63，85，86により形成したが、この構成に限られるものではなく、接合部は、例えば、基布部33，34の表面に糊などの接着剤を塗布し、あるいは、容易に破断する糸で縫い合わせるなどして構成することもできる。 In each of the above-described embodiments, the peelable joint portion is formed by the adhesive portions 61, 62, 63, 85, 86 to which a double-sided tape as an adhesive means is attached. However, the present invention is not limited to this configuration. Alternatively, the joint portion can be configured by, for example, applying an adhesive such as glue on the surfaces of the base fabric portions 33 and 34, or sewing them together with a thread that easily breaks.

また、上記の各実施の形態において、腕部71，72，81，82の長さや、腕部71，72，81，82と集積部66とを接着する接着部61，62，63，85，86の位置は、上記の構成に限られない。例えば、腕部71，72，81，82の先端部同士を接触あるいは僅かな間隔を介して対向するように延設し、集積部66の全体あるいはほぼ全体を腕部71，72，81，82すなわち包囲部65で包むこともできる。また、例えば、腕部71，72，81，82の先端部同士を重ねるとともに、腕部71，72，81，82の先端部同士を接着して接合し、集積部66の全体を包むこともできる。 In each of the above embodiments, the lengths of the arm portions 71, 72, 81, 82 and the bonding portions 61, 62, 63, 85, which bond the arm portions 71, 72, 81, 82 and the stacking portion 66, The position of 86 is not limited to the above configuration. For example, the tip portions of the arm portions 71, 72, 81, 82 are extended so as to face each other with a slight gap therebetween, and the whole or almost the whole of the stacking portion 66 is extended to the arm portions 71, 72, 81, 82. That is, it can be wrapped by the surrounding portion 65. Further, for example, the tip portions of the arm portions 71, 72, 81, and 82 are overlapped with each other, and the tip portions of the arm portions 71, 72, 81, and 82 are bonded and joined to wrap the entire stacking portion 66. it can.

そして、腕部71，72，81，82の先端部同士を近接させ、包囲部65を断面閉環状とする構成では、閉環状とした包囲部65が開口するように展開する過程で、この包囲部65の開口方向に集積部66の展開方向を案内して円滑に展開させることができる。 In the configuration in which the distal end portions of the arm portions 71, 72, 81, 82 are brought close to each other and the surrounding portion 65 has a closed annular shape, the surrounding portion 65 is expanded in a process of opening so as to open the surrounding annular portion 65. The developing direction of the accumulation part 66 can be guided in the opening direction of the part 65 and smoothly developed.

また、上記の各実施の形態において、集積部66は下端部39aから反対方向に、すなわち、車内側すなわち所定面の反対側に巻き上げるように巻回することもできる。この構成では、ガスの導入時に、集積部66は所定面に沿って転がるように展開する。また、図１に示す実施の形態において、集積部66を車内側に巻き上げるように巻回する構成では、上流側に位置する第１の腕部71は車外側に位置し、この第１の腕部71の下流側に連通する第２の腕部72は車内側に位置する。そこで、エアバッグ１にガス導入部36からガスが供給され、包囲部65の第１の腕部71にガスが供給されて膨張展開すると、膨張展開する第１の腕部71が集積部66を車内側に移動させてヘッドライニングを押しのけさせる。そして、第１の腕部71を介してガスが救急された第２の腕部72が展開すると、集積部66が開放され、所定面に沿って転がるように下方に展開する。 Further, in each of the above-described embodiments, the stacking portion 66 can be wound in the opposite direction from the lower end portion 39a, that is, so as to wind up in the vehicle interior, that is, on the opposite side of the predetermined surface. In this configuration, when the gas is introduced, the accumulating unit 66 expands so as to roll along a predetermined plane. Further, in the embodiment shown in FIG. 1, in the configuration in which the stacking portion 66 is wound so as to wind up inside the vehicle, the first arm portion 71 located on the upstream side is located outside the vehicle, and the first arm The second arm portion 72 communicating with the downstream side of the portion 71 is located on the vehicle inner side. Therefore, when the gas is supplied to the airbag 1 from the gas introduction portion 36 and the gas is supplied to the first arm portion 71 of the surrounding portion 65 and inflated and deployed, the first arm portion 71 that is inflated and deployed becomes connected to the stacking portion 66. Move it to the inside of the car and push the headlining away. Then, when the second arm portion 72 in which the gas is rescued via the first arm portion 71 is deployed, the accumulation portion 66 is opened and deployed downward so as to roll along a predetermined surface.

また、集積部66は、ロール状に折り畳まれた構成に限られず、例えば、蛇腹状とし、あるいは単に寄せ集めるように集積した構成とすることもできる。なお、対をなす腕部71，72，81，82の先端部同士の間を、張った状態の基布部33，34とすることにより、折り畳んだ形状を保持できる。また、対をなす腕部71，72，81，82の先端部同士同士を接合部で接合する事により、集積部66の折畳形状について、自由に設定することができる。 Further, the stacking unit 66 is not limited to a configuration folded in a roll shape, and may be configured to have, for example, a bellows shape or a stacking configuration that is simply gathered. In addition, the folded shape can be maintained by using the stretched base fabric portions 33 and 34 between the tip portions of the arm portions 71, 72, 81, and 82 that form a pair. In addition, the folded shape of the stacking portion 66 can be freely set by joining the tip portions of the arm portions 71, 72, 81, 82 forming a pair to each other at the joining portion.

また、エアバッグ１の側面視の形状については、適宜の構成を採ることができ、例えば、副膨張部44，45，46を設けず、ガス案内部40をエアバッグ本体部30の全長あるいはほぼ全長にわたって形成することもできる。また、ガス導入部36は、エアバッグ本体部30の前後方向の中央上部に位置させることもできる。 Further, the shape of the airbag 1 in a side view can take an appropriate configuration. For example, the auxiliary gas inflating portions 44, 45, 46 are not provided, and the gas guide portion 40 is made to be the entire length of the airbag main body 30 or almost the same. It can also be formed over the entire length. Further, the gas introduction part 36 can be positioned at the center upper part in the front-rear direction of the airbag main body part 30.

また、エアバッグ１は、上側から下側に向かって展開して自動車の側方の窓部を覆う構成に限られず、適宜のエアバッグ装置に適用できる。 Further, the airbag 1 is not limited to a configuration in which the airbag 1 is deployed from the upper side to the lower side and covers the side windows of the automobile, and can be applied to an appropriate airbag device.

本発明は、例えば、自動車の側部の窓部に沿ってエアバッグを展開するエアバッグ装置に適用できる。 The present invention can be applied to, for example, an airbag device that deploys an airbag along a window on a side portion of an automobile.

１エアバッグ
33，34 基布部
38 展開基部
39 展開先端部
61 接合部としての第１の接着部
62 接合部としての第２の接着部
63 接合部としての第３の接着部
65 包囲部
66 集積部
71 腕部としての第１の腕部
72 腕部としての第２の腕部
80 所定位置としての通気位置
81，82 腕部
85，86 接合部としての接着部 1 Airbag
33, 34 base fabric
38 Deployment base
39 Deployment tip
61 First adhesive part as joint
62 Second adhesive part as joint
63 Third bonded part as joint
65 Siege
66 Stacking unit
71 First arm as arm
72 Second arm as arm
80 Ventilation position as a predetermined position
81, 82 arms
85, 86 Adhesives as joints

Claims

An airbag that includes a deployment base and a deployment tip that is continuous with the deployment base, and is deployed by sequentially supplying gas from the folded state to the deployment base and the deployment tip.
In the folded state
A stacking unit in which the unfolding tip is stacked and folded;
An encircling part in which at least a part of the stacking part is wrapped and the development base is folded;
An airbag comprising: a joint portion that releasably joins the surrounding portion to at least one of the other portion of the surrounding portion and the accumulation portion.

The surrounding portion includes a pair of arm portions extending so as to wrap the accumulation portion,
These arm parts are formed by folding back a flat base.
The airbag according to claim 1, wherein the joint portion joins the arm portion and the accumulation portion.

The surrounding portion includes a pair of arms that extend from a predetermined position in the deployment base toward the opposite sides to wrap the accumulation portion,
The airbag according to claim 1, wherein the joint portion joins the arm portion and the accumulation portion.

A flat bag shape composed of overlapping base fabric parts,
Folded along the roof side of the vehicle compartment,
Gas is supplied and expands into a plane along the side of the passenger compartment,
The airbag according to any one of claims 1 to 3, wherein the joint portion is configured by an adhesive means provided on the base fabric portion along a longitudinal direction of the base fabric portion.