JP4820475B2 - Air bag folding method, air bag device assembling method, and air bag - Google Patents

Air bag folding method, air bag device assembling method, and air bag Download PDF

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JP4820475B2
JP4820475B2 JP2006181600A JP2006181600A JP4820475B2 JP 4820475 B2 JP4820475 B2 JP 4820475B2 JP 2006181600 A JP2006181600 A JP 2006181600A JP 2006181600 A JP2006181600 A JP 2006181600A JP 4820475 B2 JP4820475 B2 JP 4820475B2
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airbag
folded
folding
gas introduction
introduction opening
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JP2008007034A (en
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克巳 石川
隆二 鷺坂
章宏 荊沢
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Nihon Plast Co Ltd
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Description

本発明は、エアバッグを左右対称にコンパクトに折り畳むことができ、また、その折り畳まれたエアバッグを乗員側に向けて円滑に膨張展開させて乗員を確実に且つ効果的に保護できる合理的なエアバッグの折り畳み方法、及びその折り畳み方法によって折り畳まれたエアバッグをエアバッグ装置に組み込むエアバッグ装置の組立て方法に関する。   The present invention can fold an airbag in a symmetrically compact manner, and can smoothly inflate and deploy the folded airbag toward the occupant side to reliably and effectively protect the occupant. The present invention relates to a method for folding an airbag, and a method for assembling an airbag device in which an airbag folded by the folding method is incorporated into an airbag device.

自動車の乗員の安全を確保するために、従来のシートベルト装置に加え、自動車が大きな衝撃を受けたときに人体に加わる衝撃力を緩和するエアバッグ装置が広く実用化されている。このエアバッグ装置は、自動車が受けた衝撃を感知して作動し、インフレーターからエアバッグの内部に気体を導入してエアバッグを瞬時に膨張させることによって、同エアバッグにより乗員の上半身を緩衝支持して、人体への衝撃力を大幅に緩和する。また近年では、標準装備として運転席だけでなく助手席や後部座席にもエアバッグ装置が搭載されるようになってきている。   In order to ensure the safety of vehicle occupants, in addition to conventional seat belt devices, airbag devices that relieve the impact force applied to the human body when the vehicle receives a large impact are widely put into practical use. This airbag device operates by sensing the impact received by the automobile, and introduces gas into the airbag from the inflator to instantly inflate the airbag, thereby buffering and supporting the upper body of the occupant. In this way, the impact force on the human body is greatly reduced. In recent years, as a standard equipment, not only the driver's seat but also the passenger seat and the rear seat have been equipped with airbag devices.

ところで、このエアバッグ装置は、装置内に組み込んだエアバッグを適正な速度で且つ適正な形態で膨張させることにより、乗員を効果的に保護することができるものである。しかしながら、エアバッグの膨張速度及び膨張形態は、エアバッグ自体の形状やエアバッグ装置の構造により左右されるのは勿論のこと、エアバッグ装置内でのエアバッグの折り畳み形態によっても大きく影響される。そのため、従来からエアバッグの形状、エアバッグ装置の構造、及びエアバッグの折り畳み方法について様々な改良がなされている。   By the way, this airbag apparatus can protect a passenger | crew effectively by inflating the airbag incorporated in the apparatus at an appropriate speed and in an appropriate form. However, the inflation speed and the inflation form of the airbag are greatly influenced not only by the shape of the airbag itself and the structure of the airbag apparatus, but also by the folded form of the airbag in the airbag apparatus. . For this reason, various improvements have been made to the shape of the airbag, the structure of the airbag device, and the method of folding the airbag.

例えば従来において、ステアリングホイールの中央に装着される運転席のエアバッグ装置は、2枚一対の略円形の基布をその外周に沿って縫着してエアバッグを形成し、衝撃を感知したときに略球形に膨張展開させる形態が採用されている。しかしながら、かかる形態のエアバッグは、例えば助手席等のように乗員の前方空間が大きな部位に設置する場合には、十分な膨出の奥行きを得ることができない。そこで従来では、例えば特開2003−137060号公報(特許文献1)に開示されているように、所定の手順で折り畳まれたエアバッグを錐体状又は錐台状に膨張展開させる形態を有するエアバッグ装置が助手席等に搭載されている。   For example, in the related art, an airbag device for a driver's seat mounted in the center of a steering wheel is formed by sewing an air bag by sewing two pairs of substantially circular base fabrics along the outer periphery thereof, and detecting an impact. In this case, a form that expands and expands into a substantially spherical shape is adopted. However, when the airbag of this form is installed in a portion where the front space of the occupant is large, such as a passenger seat, for example, a sufficient bulge depth cannot be obtained. Therefore, conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-137060 (Patent Document 1), an air bag having a configuration in which an airbag folded in a predetermined procedure is inflated and deployed into a cone shape or a frustum shape. A bag device is mounted on the passenger seat.

この特許文献1に記載されているエアバッグは、膨張展開時に乗員側で略鉛直方向に沿って配置される乗員側壁部の布材と、同乗員側壁部の外周縁から車両前方側に略円錐状に狭まる周壁部の布材とを備えている。前記周壁部の布材は、略正六角形状の二つの基布を上下に連結させて、中央付近の左右両縁を凹ませた瓢箪形状に形成されており、下側の略正六角形状の基布にガス流入口が設けられている。また、前記乗員側壁部の布材は、略正六角形状に形成されている。これらの周壁部の布材と乗員側壁部の布材とが縫製により縫着されてエアバッグが形成されている。   The airbag described in Patent Document 1 includes a cloth material for an occupant side wall portion that is disposed along a substantially vertical direction on the occupant side during inflation and deployment, and a substantially conical shape from the outer peripheral edge of the occupant side wall portion toward the vehicle front side. And a cloth material of the peripheral wall portion narrowed in a shape. The cloth material of the peripheral wall portion is formed in a bowl shape in which two right and left edges in the vicinity of the center are recessed by connecting two substantially regular hexagonal base fabrics up and down. A gas inlet is provided in the base fabric. Moreover, the cloth material of the passenger side wall is formed in a substantially regular hexagonal shape. The cloth material of the peripheral wall portion and the cloth material of the passenger side wall portion are sewn by sewing to form an airbag.

このような特許文献1のエアバッグは、エアバッグ装置に収納される前に、以下のような予備折り工程、横折り工程、及び縦折り工程が行われて折り畳まれている。具体的に説明すると、先ず予備折り工程として、図12に示すように、乗員側壁部111における上縁112の近傍を内側に折り込んで乗員側壁部111を周壁部118の下部側に重ねることにより平らに折り畳む。   Such an airbag of Patent Document 1 is folded by the following pre-folding process, horizontal folding process, and vertical folding process before being stored in the airbag apparatus. Specifically, as a preliminary folding step, as shown in FIG. 12, the vicinity of the upper edge 112 of the occupant side wall 111 is folded inward and the occupant side wall 111 is overlapped on the lower side of the peripheral wall 118. Fold it down.

このとき、周壁部118における左右の部位と、周壁部118における乗員側壁部上縁との連結部位とが、左側の部位に折目CL,右側の部位に図示しない折目CR,及び連結部位に折目CHを付けて内側に向けて折り込まれる。更に、ガス流入口120の前方側部位125から突出頂部131までにおいては、部位132をガス流入口120側に接近させるように谷折りにして、エアバッグ140を平坦に折り畳む。   At this time, the left and right portions of the peripheral wall portion 118 and the connecting portion of the peripheral wall portion 118 with the occupant side wall upper edge are the crease CL on the left portion, the fold CR not shown on the right portion, and the connecting portion. Folded inward with a crease CH. Further, from the front side portion 125 of the gas inlet 120 to the projecting top portion 131, the airbag 140 is folded flat by making a valley fold so that the portion 132 approaches the gas inlet 120 side.

次に、横折り工程として、図13に示すように、予備折りしたエアバッグ140のガス流入口120の後端に沿うように左右方向に折目を付けて、エアバッグ140を横折り(二つ折り)することにより後方側部位141と前方側部位142とを重ね合わせる。更に、図14(a)に示すように、後方側部位141の後端141aをガス流入口120に向けてロール折りするとともに、図14(b)に示すように、前方側部位142の前端142aを蛇腹折りした後、後方側部位141と前方側部位142とをガス流入口120の裏面上に載置する。これにより、エアバッグ140が、図15に示すように幅方向(左右方向)に細長い状態に折り畳まれる。   Next, as a horizontal folding step, as shown in FIG. 13, the airbag 140 is folded in the left-right direction along the rear end of the gas inlet 120 of the preliminarily folded airbag 140, and the airbag 140 is folded horizontally (two The rear part 141 and the front part 142 are overlapped. Further, as shown in FIG. 14A, the rear end 141a of the rear portion 141 is roll-folded toward the gas inlet 120, and the front end 142a of the front portion 142 is shown in FIG. 14B. After the bellows are folded, the rear portion 141 and the front portion 142 are placed on the back surface of the gas inlet 120. As a result, the airbag 140 is folded into an elongated state in the width direction (left-right direction) as shown in FIG.

前記横折り工程を行った後には、ガス流入口120の左方側部位143と右方側部位144とについて前後方向に沿う折目を付けて、端部143a,144aをそれぞれガス流入口120に接近させるようにロール折りによる縦折りを行う。これによって、図16に示すように、折り畳まれたエアバッグ140がガス流入口120の裏面上に載置された状態となる。この縦折り工程を行った後、折り崩れしないように、折り畳んだエアバッグ140をラッピングシートで包む。   After performing the horizontal folding step, the left side portion 143 and the right side portion 144 of the gas inlet 120 are folded along the front-rear direction, and the end portions 143a and 144a are respectively connected to the gas inlet 120. Perform vertical folding by roll folding so as to approach. Accordingly, as shown in FIG. 16, the folded airbag 140 is placed on the back surface of the gas inlet 120. After the vertical folding process, the folded airbag 140 is wrapped with a wrapping sheet so as not to collapse.

上記のようにして折り畳まれたエアバッグであれば、インフレーターから膨張用ガスがガス流入口を介して内部に導入されることにより、ラッピングシートを破断し、前記縦折りの折目と前記横折りの折目とを順番に解消して、錐体状又は錐台状の形態で膨張展開させることができる。これにより、助手席等のように乗員の前方空間が大きい場合でも、エアバッグが所定の奥行きを有する錐体状又は錐台状の形態で膨張展開するため、乗員の安全を適切に確保することができる。
特開2003−137060号公報
In the case of the airbag folded as described above, the inflation gas is introduced from the inflator through the gas inlet to break the wrapping sheet, and the longitudinal fold and the lateral fold. Can be inflated and deployed in the form of a cone or a frustum. Thereby, even when the front space of the occupant is large, such as a passenger seat, the airbag is inflated and deployed in the form of a cone or frustum having a predetermined depth, so that the safety of the occupant is appropriately secured. Can do.
JP 2003-137060 A

特許文献1に記載されているエアバッグは、上述のような予備折り工程、横折り工程、及び縦折り工程が順番に行われて折り畳まれているため、例えば縦折り工程の際には、横折り工程にてロール折りをした後方側部位と、蛇腹折りをした前方側部位とを、更に左右の側端部からガス流入口に向けてロール折りにより折り畳まなければならない。   Since the airbag described in Patent Document 1 is folded by performing the preliminary folding process, the horizontal folding process, and the vertical folding process in order as described above, for example, in the vertical folding process, It is necessary to further fold the rear side part folded in the roll in the folding step and the front side part folded in bellows by roll folding from the left and right side ends toward the gas inlet.

しかしながら、錐体状又は錐台状に膨張展開するエアバッグの形状から、前記横折り工程でロール折りする後方側部位の長さと、蛇腹折りする前方側部位の長さとには差が生じており、前方側部位の長さが後方側部位よりも短くなっている。このため、横折り工程を行った際に(図15を参照)、後方側部位及び前方側部位をそれぞれタイトに折り畳んだとしても、前方側部位の厚さが後方側部位よりも薄くなり易い。このため、その後に縦折り工程を行った際に、前方側部位を折り畳んだ箇所に弛みが生じたり、また、隙間や皺等が生じたりすることがあった。このように折り畳んだエアバッグに部分的な弛み等が生じていると、エアバッグのコンパクト化が妨げられ、更に、エアバッグの膨張展開挙動にも影響する。またこのために、エアバッグの折り畳みにおける管理工数がかかってしまい、エアバッグ装置の製造コストの低減が難しい。   However, due to the shape of the airbag that inflates and deploys in the shape of a cone or a frustum, there is a difference between the length of the rear side portion that is roll-folded in the lateral folding step and the length of the front side portion that is bellow-folded. The length of the front part is shorter than the rear part. For this reason, when the lateral folding process is performed (see FIG. 15), even if the rear part and the front part are folded tightly, the thickness of the front part is likely to be thinner than the rear part. For this reason, when performing the longitudinal folding process after that, the part which folded the front side site | part may produce slack, and a gap | interval, a wrinkle, etc. may arise. If the airbag folded in this way has a partial slack or the like, downsizing of the airbag is hindered, and further, the airbag is inflated and deployed. For this reason, management man-hours are required for folding the airbag, and it is difficult to reduce the manufacturing cost of the airbag device.

また一般的に、エアバッグは、乗員をより確実に保護するために、膨張展開するときに左右方向に均等で対称的に膨張すると同時に、乗員側に向けても円滑に膨張することが望まれている。しかしながら、前記特許文献1に記載のエアバッグは、横折りが行われた後に縦折りが行われているため、膨張展開する際には先ず縦折りした部分が左右方向に展開し、その後に後方側部位及び前方側部位が展開して段階的に膨張するものである。   In general, in order to protect the occupant more reliably, it is desired that the airbag be inflated evenly and symmetrically in the left-right direction when it is inflated and deployed, and at the same time, be inflated smoothly toward the occupant. ing. However, since the airbag described in Patent Document 1 is vertically folded after being horizontally folded, when the airbag is inflated and deployed, the vertically folded portion is first deployed in the left-right direction, and then rearwardly. A side part and a front side part expand | swell and expand in steps.

本発明は、かかる従来の課題を解消すべくなされたものであり、その具体的な目的は、エアバッグを左右対称的に、且つ全体的にタイトに折り畳むことができ、また、その折り畳んだエアバッグを左右方向及び乗員側への方向に円滑に膨張展開させることが可能な合理的なエアバッグの折り畳み方法、及びその折り畳み方法によって折り畳まれたエアバッグをエアバッグ装置に装着するエアバッグ装置の組立て方法を提供することにある。   The present invention has been made in order to solve such a conventional problem. A specific object of the present invention is to be able to fold an airbag symmetrically and overall tightly, and to fold the folded air. A rational airbag folding method capable of smoothly inflating and deploying a bag in the left-right direction and the occupant side, and an airbag device for mounting an airbag folded by the folding method on an airbag device To provide an assembly method.

上記目的を達成するために、本発明により提供されるエアバッグの折り畳み方法は、基本的な構成として、上面部と、前記上面部とはフロントウインド側の前端縁で連繋され、前記前端縁側にガス導入開口部を有する下面部と、前記上面部及び前記下面部の左右側縁に連繋された左右の各側面部と、前記上面部、前記下面部、及び前記左右側面部の各乗員側端縁に連繋された乗員対向面部とを備え、乗員に向けて錐体状又は錐台状に膨張展開することが可能なエアバッグを折り畳む方法であって、前記左右側面部を前記エアバッグの左右幅方向にそれぞれ引っ張って山折りに折り畳むとともに前記乗員対向面部を前記上面部と前記下面部との間へ谷折りに折り込むことにより、前記上面部及び前記下面部を上下に重ね合わせるように前記エアバッグを平坦に折り畳む第1工程と、前記ガス導入開口部を前記上面部側表面に折り返すとともに、同折り返しによって前記ガス導入開口部の裏側に折り込まれる前記上面部の前端縁側部位を、前記ガス導入開口部の前端縁側へ引き出して蛇腹状に折り畳み、更に、同折り畳みによって前記上面部の幅方向中心部分で弛緩する基布を二等辺三角形状に平坦に折り畳む第2工程と、前記エアバッグの幅方向の長さが前記ガス導入開口部の幅と等しくなるように、前記エアバッグの幅方向へ膨出している左右両側部を中心線に向けて谷折りにして前記エアバッグを細長状に折り畳む第3工程と、前記細長状のエアバッグを、前記ガス導入開口部とは反対側の先端部から前記ガス導入開口部に向けて蛇腹状又はロール状に折り畳み、その折り畳んだ折り畳み体を前記ガス導入開口部の裏面上に載置する第4工程と、を含むことを最も主要な特徴とするものである。   In order to achieve the above object, the airbag folding method provided by the present invention is basically configured such that the upper surface portion and the upper surface portion are connected to each other at the front edge on the front window side, A lower surface portion having a gas introduction opening, left and right side surfaces connected to left and right side edges of the upper surface portion and the lower surface portion, and each occupant side end of the upper surface portion, the lower surface portion, and the left and right side surface portions An airbag that can be inflated and deployed in the shape of a cone or a frustum toward an occupant, the left and right side portions being left and right of the airbag. Pulling each in the width direction to fold it into a mountain fold, and folding the occupant facing surface portion into a valley fold between the upper surface portion and the lower surface portion, so that the upper surface portion and the lower surface portion overlap each other vertically A first step of folding the base plate flatly, and the gas introduction opening portion is folded back to the upper surface portion side surface, and the front end edge side portion of the upper surface portion folded into the back side of the gas introduction opening portion by the folding is formed on the gas. A second step of pulling out to the front end edge side of the introduction opening and folding it into a bellows shape, and further folding the base fabric loosened at the center portion in the width direction of the upper surface portion into the isosceles triangle shape by the folding; The airbag is elongated by folding the left and right side bulging in the width direction of the airbag toward the center line so that the length in the width direction is equal to the width of the gas introduction opening. A third step of folding, and the elongated airbag is folded in a bellows shape or a roll shape from a tip portion opposite to the gas introduction opening portion to the gas introduction opening portion, and then folded. A fourth step of placing the folded body on the back surface of the gas inlet opening Ri is for the most important feature to include.

本発明に係るエアバッグの折り畳み方法は、前記第2工程において、前記ガス導入開口部を前記上面部側へ折り返した際に、前記ガス導入開口部の左右側方の部位を同ガス導入開口部の裏側に折り込むことが好ましい。   According to the airbag folding method of the present invention, when the gas introduction opening portion is folded back to the upper surface portion side in the second step, the gas introduction opening portion is located on the left and right sides of the gas introduction opening portion. It is preferable to fold into the back side.

また、本発明の折り畳み方法においては、前記エアバッグが、前記ガス導入開口部に取付けられた前記エアバッグを保護するための細長状のフラップ帯片と、前記エアバッグ及び前記フラップ帯片を固定し、前記エアバッグの膨張展開時に破断可能なラッピングシートとを備えてなり、前記フラップ帯片を長さ方向に蛇腹状に折り畳むこと、前記第4工程で前記ガス導入開口部の裏面上に載置した前記折り畳み体の上に、前記フラップ帯片を載置すること、前記エアバッグと前記フラップ帯片とを、前記ラッピングシートで上方から包んで固定すること、を含むことが好ましい。   Moreover, in the folding method of the present invention, the airbag fixes the elongated flap strip for protecting the airbag attached to the gas introduction opening, and the airbag and the flap strip. And a wrapping sheet that can be broken when the airbag is inflated and deployed, folding the flap strip in a bellows shape in the length direction, and mounting on the back surface of the gas introduction opening in the fourth step. It is preferable to include placing the flap strip on the folded body placed, and wrapping and fixing the airbag and the flap strip from above with the wrapping sheet.

更に、本発明により提供されるエアバッグ装置の組立て方法は、前記構成を有するエアバッグの折り畳み方法により折り畳まれた前記エアバッグの前記ガス導入開口部をエアバッグ装置のガス噴出部の位置に合わせて、前記エアバッグを前記エアバッグ装置の金属製ケース内に収納することを特徴とするものである。
更にまた、本発明により提供されるエアバッグは、前記構成を有するエアバッグの折り畳み方法により折り畳まれた形態を有していることを特徴とするものである。
Further, the assembly method of the airbag device provided by the present invention is such that the gas introduction opening of the airbag folded by the airbag folding method having the above-described configuration is aligned with the position of the gas ejection portion of the airbag device. The airbag is housed in a metal case of the airbag device.
Furthermore, the airbag provided by the present invention is characterized in that it is folded by the airbag folding method having the above-described configuration.

本発明に係るエアバッグの折り畳み方法は、前述のように上面部、下面部、左右側面部、及び乗員対向面部を備え、乗員に向けて錐体状又は錐台状に膨張展開することが可能なエアバッグを、少なくとも以下の第1工程〜第4工程を行うことによって折り畳む。   The airbag folding method according to the present invention includes an upper surface portion, a lower surface portion, left and right side surface portions, and an occupant facing surface portion as described above, and can be inflated and deployed in a cone shape or a frustum shape toward the occupant. A simple airbag is folded by performing at least the following first to fourth steps.

先ず、第1工程として、前記左右側面部を山折りに折り畳むとともに前記乗員対向面部を前記上面部と前記下面部との間へ谷折りに折り込む。これにより、錐体状又は錐台状に膨張展開することが可能なエアバッグを、前記上面部及び前記下面部を上下に重ね合わせるように平坦に折り畳むことができる。   First, as a first step, the left and right side surface portions are folded in a mountain fold, and the occupant facing surface portion is folded in a valley fold between the upper surface portion and the lower surface portion. Thereby, the airbag which can be inflated and deployed in a cone shape or a frustum shape can be folded flat so that the upper surface portion and the lower surface portion overlap each other.

次に、第2工程として、ガス導入開口部を上面部側表面に折り返すとともに、上面部の前端縁側部位をガス導入開口部の前端縁側へ引き出して蛇腹状に折り畳み、更に、上面部の幅方向中心部分で弛緩する基布を二等辺三角形状に平坦に折り畳む。このような第2工程を行うことにより、ガス導入開口部を上面部側表面に折り返しても、エアバッグの基布が部分的に弛むことを防いでタイトに折り畳むことができる。更にこれにより、後工程となる第4工程においてエアバッグを蛇腹状又はロール状に折り畳む際に、エアバッグの基布に歪みや皺が生じることを効果的に防ぐことができる。   Next, as a second step, the gas introduction opening is folded back to the upper surface side surface, the front end edge side portion of the upper surface part is drawn out to the front end edge side of the gas introduction opening and folded into a bellows shape, and further the width direction of the upper surface part A base fabric that relaxes in the center is folded flat into an isosceles triangle. By performing such a second step, even if the gas introduction opening is folded back to the upper surface, the base fabric of the airbag can be tightly folded while preventing partial loosening. Further, this makes it possible to effectively prevent the airbag base fabric from being distorted or wrinkled when the airbag is folded into a bellows shape or a roll shape in the fourth step, which is a subsequent step.

続いて、第3工程として、エアバッグの幅方向の長さがガス導入開口部の幅と等しくなるように、エアバッグの幅方向へ膨出している両側部を中心線に向けて内側に折り込んで(谷折りにして)エアバッグを細長状に折り畳み、その後、第4工程として、その細長状のエアバッグを、ガス導入開口部とは反対側の先端部からガス導入開口部に向けて蛇腹状又はロール状に折り畳み、その折り畳んだ折り畳み体をガス導入開口部の裏面上に載置する。   Subsequently, as a third step, both side portions bulging in the width direction of the airbag are folded inward toward the center line so that the length in the width direction of the airbag becomes equal to the width of the gas introduction opening. The air bag is folded into a slender shape (with a valley fold), and then, as a fourth step, the slender airbag is bellows from the tip opposite to the gas introduction opening toward the gas introduction opening. The folded body is folded on the back surface of the gas inlet opening.

上記のような第4工程までを行うことにより、不自然な歪みや皺を生じることなく、エアバッグを左右対称的に且つ全体的にタイトにしっかりと折り畳むことができるため、エアバッグの折り畳み形態をコンパクトにするとともにエアバッグの折り畳み状態を安定させることができる。   By performing the process up to the fourth step as described above, the airbag can be folded tightly symmetrically and tightly as a whole without causing unnatural distortion and wrinkles. The airbag can be made compact and the folded state of the airbag can be stabilized.

従来のエアバッグは、その折り畳み方によって、例えば前記特許文献1のように左右方向と乗員側への方向とに段階的に膨張展開する場合があり、またその他に、例えば左右に偏りがでるように折り畳まれたエアバッグは、膨張展開の方向がずれ易い。しかし、本発明の折り畳み方法によって折り畳まれたエアバッグは、偏った方向への膨張展開を防いで、左右方向に均等で対称的に膨張展開することができ、また、左右方向と乗員側への方向とに段階的に膨張展開することはなく、左右方向に円滑に膨張展開すると同時に乗員側に向けても円滑に膨張展開することが可能であるため、乗員の安全をより確実に確保することができる。   A conventional airbag may be inflated and deployed in a stepwise manner in the left-right direction and the direction toward the occupant side depending on how the airbag is folded, for example. The air bag folded in the direction of inflating and deploying easily shifts. However, the airbag folded by the folding method of the present invention can be inflated and deployed equally in the left-right direction while preventing inflated and deployed in a biased direction, and can be expanded in the left-right direction and the occupant side. It is possible to inflate and deploy smoothly in the right and left direction and at the same time smoothly inflate and deploy toward the occupant side, so that the safety of the occupant can be ensured more reliably. Can do.

また、本発明の折り畳み方法では、前記第2工程において、ガス導入開口部を上面部側へ折り返した際に、ガス導入開口部の幅方向からはみ出しているガス導入開口部の左右側方の部位を同ガス導入開口部の裏側に折り込むことにより、エアバッグをよりタイトに折り畳んで、よりコンパクトにまとめることができる。   Further, in the folding method of the present invention, in the second step, when the gas introduction opening portion is folded back to the upper surface portion side, the left and right side portions of the gas introduction opening portion protruding from the width direction of the gas introduction opening portion. Is folded into the back side of the gas introduction opening, so that the airbag can be folded tighter and more compact.

更に本発明では、エアバッグが、エアバッグ保護用のフラップ帯片と、エアバッグ及びフラップ帯片を固定するラッピングシートとを備えている場合、フラップ帯片を長さ方向に蛇腹状に折り畳むこと、前記第4工程でガス導入開口部の裏面上に載置した折り畳み体の上にフラップ帯片を載置すること、エアバッグとフラップ帯片とをラッピングシートで上方から包んで固定することを含むことにより、フラップ帯片もタイトに折り畳むことができる。更に、エアバッグ及びフラップ帯片がコンパクトに折り畳まれた状態をラッピングシートで安定して維持することができ、エアバッグ装置への取り付けを容易に行うことが可能となる。   Further, in the present invention, when the airbag includes a flap strip for protecting the airbag and a wrapping sheet for fixing the airbag and the flap strip, the flap strip is folded in a bellows shape in the length direction. , Placing the flap strip on the folding body placed on the back surface of the gas introduction opening in the fourth step, and wrapping and fixing the airbag and the flap strip from above with a wrapping sheet. By including, a flap strip can also be folded tightly. Furthermore, the state in which the airbag and the flap strip are folded in a compact manner can be stably maintained with the wrapping sheet, and the attachment to the airbag device can be easily performed.

また、本発明のエアバッグ装置の組立て方法によれば、上記のような折り畳み方法によりコンパクトに折り畳まれたエアバッグを、エアバッグ装置の金属製ケース内に容易に収納することができるため、取り付け作業が簡略化し、作業効率の向上を図ることができる。   Moreover, according to the assembly method of the airbag apparatus of the present invention, the airbag folded compactly by the folding method as described above can be easily stored in the metal case of the airbag apparatus. Work can be simplified and work efficiency can be improved.

更に、本発明のエアバッグは、上記のような折り畳み方法によって折り畳まれているため、不自然な歪みや皺が生じておらず、左右が対称的で、また全体的にタイトでコンパクトに折り畳まれた形態を有している。また、膨張展開時には、乗員側に向けて円滑に膨張展開すると同時に、左右方向にも対称的に円滑に膨張展開することが可能である。   Furthermore, since the airbag of the present invention is folded by the above folding method, it does not cause unnatural distortion and wrinkles, is symmetrical on the left and right, and is tightly and compactly folded as a whole. It has a different form. Further, at the time of inflating and deploying, it is possible to smoothly inflate and deploy toward the occupant side, and at the same time, to inflate and deploy symmetrically and smoothly in the left-right direction.

以下、本発明に係るエアバッグの折り畳み方法について、図面を参照しながら詳細に説明する。なお、本発明は、以下に説明する実施形態に限定されるものではなく、本発明と実質的に同一な構成を有し、かつ、同様な作用効果を奏しさえすれば、多様な変更が可能である。例えば、以下の実施形態においては、所定の形状を有する第1扇形基布及び第2扇形基布を連結した布材と、乗員対向側基布とを縫着することにより、錐体状に膨張展開するエアバッグが形成されている。しかし、本発明は、エアバッグを構成する基布自体の形状等には特に限定されず、錐体状又は錐台状に左右対称的に膨張展開することが可能なエアバッグであれば、同様に適用することができる。   Hereinafter, a method for folding an airbag according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications are possible as long as it has substantially the same configuration as the present invention and has the same effects. It is. For example, in the following embodiments, a cloth material obtained by connecting a first sector base fabric and a second sector base fabric having a predetermined shape and an occupant-facing side base fabric are sewn to expand in a cone shape. An airbag to be deployed is formed. However, the present invention is not particularly limited to the shape or the like of the base fabric itself constituting the airbag, and the same is applicable as long as the airbag can be inflated and deployed symmetrically in the shape of a cone or a frustum. Can be applied to.

先ず、本実施形態におけるエアバッグの構成について説明する。ここで、図1は、エアバッグを膨張展開させたときの状態を示す斜視図であり、図2の(a)及び(b)は、エアバッグを構成する布材の裁断図である。なお、本実施形態の説明において、エアバッグを車両に搭載したときに、車両のフロントウインド側となる向きを前方とし、乗員側となる向きを後方としている。   First, the structure of the airbag in this embodiment is demonstrated. Here, FIG. 1 is a perspective view showing a state when the airbag is inflated and deployed, and FIGS. 2A and 2B are cutting views of a cloth material constituting the airbag. In the description of the present embodiment, when the airbag is mounted on the vehicle, the direction on the front window side of the vehicle is the front and the direction on the occupant side is the rear.

本実施形態のエアバッグ1は、車両の助手席側に搭載されるものであり、図1に示すように、膨張展開した状態が錐体状(略四角錐状)の形態をなしている。このエアバッグ1は、上面部2と、上面部2とは前端縁10で連繋された下面部3と、上面部2及び下面部3の左右側縁に連繋された左右の各側面部8と、上面部2、下面部3、及び左右側面部8の各乗員側端縁に連繋された乗員対向面部9とを備えており、各面部2,3,8,9は、凸状の曲面で形成されている。また、下面部3の前端縁10側には、ガス導入開口部4が設けられており、左右側面部8の略中央部には、膨張展開時にガス抜きを行うベントホール5が設けられている。   The airbag 1 of the present embodiment is mounted on the passenger seat side of the vehicle, and as shown in FIG. 1, the inflated and deployed state forms a cone shape (substantially a quadrangular pyramid shape). The airbag 1 includes an upper surface portion 2, a lower surface portion 3 connected to the upper surface portion 2 at a front edge 10, and left and right side surface portions 8 connected to left and right side edges of the upper surface portion 2 and the lower surface portion 3. , An upper surface portion 2, a lower surface portion 3, and an occupant-facing surface portion 9 connected to each occupant side edge of the left and right side surface portions 8, and each of the surface portions 2, 3, 8, 9 is a convex curved surface. Is formed. Further, a gas introduction opening 4 is provided on the front end edge 10 side of the lower surface portion 3, and a vent hole 5 for venting gas at the time of expansion and deployment is provided at a substantially central portion of the left and right side surface portions 8. .

更に、ガス導入開口部4の後端には、細長状のフラップ帯片6と、エアバッグ1の基布及びフラップ帯片6を固定するためのラッピングシート7とが取り付けられている。なお、ラッピングシート7は、エアバッグ1が膨張展開した際に破断するため、図1には図示されていない。   Further, an elongated flap strip 6 and a wrapping sheet 7 for fixing the base fabric of the airbag 1 and the flap strip 6 are attached to the rear end of the gas introduction opening 4. The wrapping sheet 7 is not shown in FIG. 1 because it breaks when the airbag 1 is inflated and deployed.

前記フラップ帯片6は、エアバッグ1が収容されるエアバッグ装置の金属製ケースからエアバッグ1を保護するもので、ガス導入開口部4と略等しい幅寸法で形成されており、エアバッグ1が膨張展開する際にフラップ帯片6も同時に乗員側に展開し、エアバッグ1が金属製ケースに直接接触して傷むことを防ぐ役目を果たしている。一方、前記ラッピングシート7は、エアバッグ1が膨張展開するときに容易に破断するように切れ目等が設けられている。   The flap strip 6 protects the airbag 1 from the metal case of the airbag apparatus in which the airbag 1 is accommodated, and is formed with a width dimension substantially equal to the gas introduction opening 4. When the airbag is inflated and deployed, the flap strip 6 is also deployed on the passenger side at the same time, and serves to prevent the airbag 1 from coming into direct contact with the metal case and being damaged. On the other hand, the wrapping sheet 7 is provided with a cut so as to be easily broken when the airbag 1 is inflated and deployed.

また、ガス導入開口部4は、開口4aと、複数のボルト4bを備えた金属製のリテーナ4cとを備えており、リテーナ4cのボルト4bは、後述するエアバッグ装置の金属製ケースに設けた取付孔に挿通させてボルトを螺合させることにより、エアバッグ1をエアバッグ装置に取り付けることができるように構成されている。   The gas introduction opening 4 includes an opening 4a and a metal retainer 4c provided with a plurality of bolts 4b. The bolt 4b of the retainer 4c is provided in a metal case of an airbag device to be described later. The airbag 1 is configured to be attached to the airbag device by being inserted into the mounting hole and screwed into the bolt.

このような本実施形態のエアバッグ1は、図2に示すように、エアバッグ1の前端縁10となる基端部11aから円弧部11cに向けて左右対称に拡幅する略扇形状をなす第1扇形基布11と、基端部12a(前端縁10)から円弧部12cに向けて左右対称に拡幅する略扇形状をなす第2扇形基布12と、上半部周縁13aが第1扇形基布11の円弧部11cに対応し、下半部周縁13bが第2扇形基布12の円弧部12cに対応した略六角形状の乗員対向側基布13とから作製されている。   As shown in FIG. 2, the airbag 1 according to the present embodiment has a substantially fan shape that is symmetrically widened from the base end portion 11 a serving as the front end edge 10 of the airbag 1 toward the arc portion 11 c. 1 fan-shaped base cloth 11, 2nd fan-shaped base cloth 12 which makes the substantially fan shape widened symmetrically toward the circular arc part 12c from the base end part 12a (front-end edge 10), and the upper half part periphery 13a are 1st fan-shaped. The lower half peripheral edge 13 b corresponds to the arc portion 11 c of the base fabric 11, and is formed from the substantially hexagonal passenger-facing side base fabric 13 corresponding to the arc portion 12 c of the second fan-shaped base fabric 12.

即ち、本実施形態において、第1扇形基布11は、膨張展開時におけるエアバッグ1の上面部2と左右側面部8の上方部とを形成している。また、第2扇形基布12は、エアバッグ1の下面部3と左右側面部8の下方部とを形成している。更に、乗員対向側基布13は、乗員対向面部9を形成している。   In other words, in the present embodiment, the first sector base fabric 11 forms the upper surface portion 2 of the airbag 1 and the upper portion of the left and right side surface portions 8 during inflation and deployment. The second fan-shaped base fabric 12 forms the lower surface portion 3 of the airbag 1 and the lower portions of the left and right side surface portions 8. Furthermore, the occupant-facing side fabric 13 forms an occupant-facing surface portion 9.

また、第1扇形基布11と第2扇形基布12とは、前端縁10となる各基端部11a,12aが互いに連結された一枚の布材で構成されており、左右の半径方向に沿った各側縁部11b,12bが縫製により互いに縫着される。前記第1扇形基布11における基端部11aから円弧部11cまでの長さは、第2扇形基布12に比べて若干短く設定されている。更に、第1及び第2扇形基布11,12の各円弧部11c,12cは、乗員対向側基布13の上半部周縁13a及び下半部周縁13bにそれぞれ縫着される。   In addition, the first sector base fabric 11 and the second sector base fabric 12 are composed of a single piece of fabric material in which the base end portions 11a and 12a serving as the front end edge 10 are connected to each other, and the left and right radial directions. The side edge portions 11b and 12b along the line are sewn together by sewing. The length from the base end portion 11 a to the arc portion 11 c in the first sector base fabric 11 is set slightly shorter than that of the second sector base fabric 12. Further, the arc portions 11c and 12c of the first and second fan-shaped base fabrics 11 and 12 are sewn to the upper half peripheral edge 13a and the lower half peripheral edge 13b of the occupant facing base fabric 13, respectively.

本実施形態において、基布間の縫着は直線状又は円弧状になされており、立体的な縫着が少ないため、縫製作業が容易であるとともに作業効率も向上する。なお、本実施形態では、エアバッグ1の各基布間の接合は全て縫着により行われているが、例えば溶着、接着剤を用いた接着により接合することも可能であり、接合の方法は、エアバッグ1の材質により適宜選択することができる。また、前記エアバッグ1は、例えば、ポリエステル系繊維、ポリアミド系繊維、アラミド系繊維、芳香族ポリエステル系繊維、ビニロン系繊維、アクリル系繊維などの繊維糸条により構成され、更に、炭素繊維、ガラス繊維、金属繊維などを混繊させて補強することもできる。   In this embodiment, the sewing between the base fabrics is linear or arcuate, and since there are few three-dimensional sewings, the sewing work is easy and the work efficiency is improved. In addition, in this embodiment, all the joining between each base fabric of the airbag 1 is performed by sewing, but it is also possible to join by bonding using, for example, welding or an adhesive. Depending on the material of the airbag 1, it can be appropriately selected. The airbag 1 is made of, for example, fiber yarns such as polyester fiber, polyamide fiber, aramid fiber, aromatic polyester fiber, vinylon fiber, acrylic fiber, and further, carbon fiber, glass It can also be reinforced by mixing fibers, metal fibers and the like.

次に、上記エアバッグ1の折り畳み方法について、図3〜図11を参照しながら説明する。なお、図3〜図6では、本発明の特徴を解り易く説明するために前記フラップ帯片6及び前記ラッピングシート7の図示を省略している。また、図3(b)、図4(b)、図5(b)、図5(c)、図7(b)、及び図9〜図11では、エアバッグ1の断面形状を解り易くするために、折り畳まれた基布間に間隔をあけてその断面を図示しているが、エアバッグ1を実際に折り畳む際にはこのような間隔は存在せず、エアバッグ1はフラットに折り畳まれる。   Next, a method for folding the airbag 1 will be described with reference to FIGS. 3 to 6, illustration of the flap strip 6 and the wrapping sheet 7 is omitted for easy understanding of the features of the present invention. 3 (b), FIG. 4 (b), FIG. 5 (b), FIG. 5 (c), FIG. 7 (b), and FIG. 9 to FIG. Therefore, although the cross section is illustrated with a space between the folded base fabrics, such a space does not exist when the airbag 1 is actually folded, and the airbag 1 is folded flat. .

始めに、第1工程として、展開した状態のエアバッグ1の左右側面部8を左右幅方向にそれぞれ引っ張って山折りに折り畳みながら、図3に示したように、ガス導入開口部4を有する第2扇形基布12を下面側で一面に広げ、更に、エアバッグ1の乗員対向側基布13(乗員対向面部9)が表にくるように一面に広げることにより、エアバッグ1を平坦な状態にする。次に、図3に示した平坦な状態のエアバッグ1の乗員対向側基布13を上下半部の境界線に沿って谷折りにして第1扇形基布11を表側で一面に広げる。これにより、図4に示したように、乗員対向面部9が上面部2と下面部3との間に皺を生じさせることなくタイトに折り込まれ、第1扇形基布11(上面部2)及び第2扇形基布12(下面部3)が上下方向で重ね合わせられて、エアバッグ1が平坦に折り畳まれる。このとき、第1及び第2扇形基布11,12の左右側縁部には、ベントホール5が表われる。   First, as shown in FIG. 3, as a first step, the left and right side surface portions 8 of the airbag 1 in the deployed state are pulled in the left-right width direction and folded into mountain folds, and as shown in FIG. 2 The fan-shaped base fabric 12 is spread on one side on the lower surface side, and further, the airbag 1 is flattened by spreading on one side so that the passenger facing base fabric 13 (occupant facing surface portion 9) of the airbag 1 comes to the front. To. Next, the occupant-facing side base fabric 13 of the airbag 1 in the flat state shown in FIG. 3 is valley-folded along the boundary line between the upper and lower halves so that the first fan-shaped base fabric 11 is spread all over on the front side. As a result, as shown in FIG. 4, the occupant facing surface portion 9 is tightly folded without causing wrinkles between the upper surface portion 2 and the lower surface portion 3, and the first sector base fabric 11 (upper surface portion 2) and The second fan-shaped base fabric 12 (lower surface portion 3) is overlapped in the vertical direction, and the airbag 1 is folded flat. At this time, the vent hole 5 appears at the left and right side edges of the first and second fan-shaped base fabrics 11 and 12.

前記第1工程を行った後、図5に示すような第2工程を行う。この第2工程では、先ず、エアバッグ1の裏側に隠れているガス導入開口部4を、上面部2を形成する第1扇形基布11側の表面に折り返す。このとき、ガス導入開口部4を単に表面に折り返しただけでは、図5(b)に示すように、第1扇形基布11の前端縁10側の部位16がガス導入開口部4の裏側に折り込まれて、ガスの導入路が塞がれてしまう。このため、第2工程では、このガス導入開口部4の裏側に折り込まれる第1扇形基布11の前端縁側部位16を、ガス導入開口部4の前端縁10側へ引き出し、その引き出した部位16の一部を図5(c)に示すように蛇腹状に2段に折り畳む。このとき、蛇腹状に折り畳む第1扇形基布11の部位16の長さを調節することにより、第1扇形基布11に皺や歪みが生じることを効果的に防ぐことができる。   After performing the first step, a second step as shown in FIG. 5 is performed. In the second step, first, the gas introduction opening 4 hidden on the back side of the airbag 1 is folded back to the surface on the first sector base fabric 11 side forming the upper surface portion 2. At this time, if the gas introduction opening 4 is simply folded back to the surface, the portion 16 on the front edge 10 side of the first sector base fabric 11 is located on the back side of the gas introduction opening 4 as shown in FIG. It is folded and the gas introduction path is blocked. For this reason, in the second step, the front edge portion 16 of the first fan-shaped base fabric 11 that is folded on the back side of the gas introduction opening 4 is drawn out to the front edge 10 side of the gas introduction opening 4 and the drawn portion 16 is drawn. As shown in FIG. 5 (c), a part of is folded in two steps like a bellows. At this time, by adjusting the length of the portion 16 of the first fan-shaped base cloth 11 that is folded in a bellows shape, it is possible to effectively prevent the first fan-shaped base cloth 11 from being wrinkled or distorted.

また、上述のようにガス導入開口部4を折り返した際には、ガス導入開口部4の左右側方に配されて左右側面部8となる第2扇形基布12の部位17もガス導入開口部4と同時に第1扇形基布11側表面に折り返される。第2工程では、このように折り返されたガス導入開口部4の左右側方の部位17を、前記前端縁側部位16を蛇腹状に折り畳む際に、ガス導入開口部4の裏側に向けて一緒に折り込む。これにより、後述する第3及び第4工程を行ってエアバッグ1を折り畳む際に、ガス導入開口部4の左右側方から基布がはみ出すことがなく、エアバッグ1をよりコンパクトにまとめることができる。   In addition, when the gas introduction opening 4 is folded as described above, the portion 17 of the second fan-shaped base cloth 12 which is disposed on the left and right sides of the gas introduction opening 4 and becomes the left and right side portions 8 is also provided in the gas introduction opening. At the same time as the portion 4, it is folded back to the surface of the first sector base fabric 11 side. In the second step, the left and right side portions 17 of the gas introduction opening 4 folded in this manner are joined together toward the back side of the gas introduction opening 4 when the front end edge side portion 16 is folded in a bellows shape. Fold it in. Thereby, when performing the 3rd and 4th process mentioned below and folding the airbag 1, a base fabric does not protrude from the right-and-left side of the gas introduction opening part 4, and the airbag 1 can be put together more compactly. it can.

更に、上述のように第1扇形基布11の前端縁側部位16が引き出されて、その一部が蛇腹状に折り畳まれた場合、第1扇形基布11の左右側縁部が基布11の中央部に向けて引き寄せられて、ベントホール5の位置が中央部側に移動するとともに、上面部2となる第1扇形基布11の幅方向中心部分が弛緩する。   Further, when the front end edge side portion 16 of the first sector base cloth 11 is pulled out as described above and a part thereof is folded in a bellows shape, the left and right side edges of the first sector base cloth 11 are the base fabric 11 portions. The position of the vent hole 5 is pulled toward the central portion, and the position of the vent hole 5 moves toward the central portion. At the same time, the central portion in the width direction of the first sector base cloth 11 that becomes the upper surface portion 2 is relaxed.

しかし、エアバッグ1を折り畳む際にこのような弛緩した部位が存在してしまうと、エアバッグ1の膨張展開挙動に大きく影響するため、第2工程では、この第1扇形基布11の幅方向中心部分で弛緩した基布を左右対称に平坦に折り畳むことにより、第1扇形基布11の表面に二等辺三角形状のタワー部14を形成する。これにより、エアバッグ1の基布が部分的に弛むことによってだぶつくことや、皺が生じることを防ぎ、エアバッグ1をタイトに折り畳むことができる。なお、このタワー部14が左右対称に形成できない場合や、タワー部14を形成しても第1扇形基布11の弛みが解消されない場合には、タワー部14が適切に形成できるように、蛇腹状に折り畳んだ第1扇形基布11の前端縁側部位16の折り畳み量を調節すれば良い。   However, if such a relaxed portion exists when the airbag 1 is folded, it greatly affects the inflating and deployment behavior of the airbag 1. Therefore, in the second step, the width direction of the first sector base fabric 11 is determined. An isosceles triangle-shaped tower portion 14 is formed on the surface of the first fan-shaped base fabric 11 by folding the base fabric relaxed at the central portion so as to be symmetrical and flat. Thereby, it can prevent that the base fabric of the airbag 1 loosens partially and a wrinkle arises, and can fold the airbag 1 tightly. In addition, when this tower part 14 cannot be formed symmetrically, or when the slack of the 1st fan-shaped base fabric 11 is not eliminated even if it forms the tower part 14, bellows so that the tower part 14 can be formed appropriately. What is necessary is just to adjust the folding amount of the front-end edge side site | part 16 of the 1st fan-shaped base fabric 11 folded in the shape.

次に、エアバッグ1の幅方向の長さがガス導入開口部4の幅と等しくなるように、エアバッグ1を前後方向に細長く折り畳む第3工程を行う。この第3工程では、先ず、表側を向いている第1扇形基布11について、ガス導入開口部4よりも幅方向(左右方向)に膨出している第1扇形基布11の左右両側部を、例えば板状部材を用いることによって、幅方向の中心線に向けて内側に谷折りにする。このとき、左右の谷折りの折目を互いに接近させて、第1扇形基布11の幅寸法をガス導入開口部4の幅寸法に合わせる。   Next, a third step is performed in which the airbag 1 is folded in the longitudinal direction so that the length of the airbag 1 in the width direction becomes equal to the width of the gas introduction opening 4. In the third step, first, the left and right side portions of the first sector base fabric 11 that bulges in the width direction (left and right direction) from the gas introduction opening 4 with respect to the first sector base fabric 11 facing the front side. For example, by using a plate-like member, the valley is folded inward toward the center line in the width direction. At this time, the folds of the left and right valley folds are brought close to each other, and the width dimension of the first sector base fabric 11 is matched with the width dimension of the gas introduction opening 4.

続いて、エアバッグ1の上下面を反転させて第2扇形基布12を表側に向け(図6を参照)、ガス導入開口部4の幅よりも左右に膨出している第2扇形基布12の左右両側部を、前記第1扇形基布11のときと同様に、幅方向の中心線に向けて内側に谷折りにする。またこの場合、前記第1及び第2扇形基布11,12をそれぞれ谷折りする際には、ガス導入開口部4とは反対側の先端部が略三角形となるように折り畳む。これにより、エアバッグ1は、図7に示したように、エアバッグ1の幅方向の長さがガス導入開口部4と等しく、前後方向に細長状に折り畳まれた状態となる。   Subsequently, the upper and lower surfaces of the airbag 1 are inverted so that the second fan-shaped base cloth 12 faces the front side (see FIG. 6), and the second fan-shaped base cloth bulges left and right beyond the width of the gas introduction opening 4. Similarly to the case of the first fan-shaped base cloth 11, the left and right side portions of 12 are folded inward toward the center line in the width direction. Further, in this case, when the first and second fan-shaped base fabrics 11 and 12 are each valley-folded, the front end portion opposite to the gas introduction opening 4 is folded so as to be substantially triangular. Accordingly, as shown in FIG. 7, the airbag 1 is in a state in which the length in the width direction of the airbag 1 is equal to the gas introduction opening 4 and is folded in an elongated shape in the front-rear direction.

また、この第3工程では、ガス導入開口部4に取り付けられたフラップ帯片6を折り畳む作業も行う。このフラップ帯片6の折り畳む方法は特に限定されないが、例えば図7に示したように、フラップ帯片6をガス導入開口部4の取り付け側近傍で蛇腹状に1段で折り畳んだ後、更にこの1段で蛇腹状に折り畳んだ部位に隣接して、同様の折り間隔でフラップ帯片6の先端まで蛇腹状に折り畳むようにする。   In the third step, the flap strip 6 attached to the gas introduction opening 4 is also folded. The method of folding the flap strip 6 is not particularly limited. For example, as shown in FIG. 7, after folding the flap strip 6 in a bellows shape in the vicinity of the attachment side of the gas introduction opening 4, Adjacent to the portion folded in a bellows shape in one step, it is folded in a bellows shape to the tip of the flap strip 6 at the same folding interval.

続いて、第4工程を行う。この第4工程では、前記第3工程で細長状に折り畳んだエアバッグ1を、ガス導入開口部4とは反対側の略三角形状の先端部15からガス導入開口部4に向けて折り畳む。本実施形態では、図8に示すように、エアバッグ1の前記先端部15から蛇腹状に4段で折り畳んだ後、この4段に折り畳んだ部分をガス導入開口部4に向けて360°回転させてロール状に折り畳む。これにより、図9に示すように、ガス導入開口部4の裏面上に、直方体状に折り畳まれたエアバッグ1の折り畳み体18が載置される。なお、本発明では、前記細長状のエアバッグ1を蛇腹状に折り畳む以外に、例えばロール状に折り畳むことも可能である。また、図9においては、エアバッグ1のフラップ帯片6及びラッピングシート7が取り付けられている側が、エアバッグ1を車両に搭載した際に乗員側となる。   Subsequently, the fourth step is performed. In the fourth step, the airbag 1 folded in an elongated shape in the third step is folded from the substantially triangular tip 15 on the opposite side to the gas introduction opening 4 toward the gas introduction opening 4. In this embodiment, as shown in FIG. 8, the airbag 1 is folded in four steps in a bellows shape from the distal end portion 15, and then the portion folded in the four steps is rotated 360 ° toward the gas introduction opening 4. And fold it into a roll. As a result, as shown in FIG. 9, the folded body 18 of the airbag 1 folded in a rectangular parallelepiped shape is placed on the back surface of the gas introduction opening 4. In addition, in this invention, it is also possible to fold the elongate airbag 1 in roll shape other than folding in the shape of a bellows. In FIG. 9, the side of the airbag 1 to which the flap strip 6 and the wrapping sheet 7 are attached is the occupant side when the airbag 1 is mounted on a vehicle.

この第4工程において、例えばエアバッグ1をガス導入開口部4に向けて蛇腹状に折り畳んだときに、エアバッグ1に弛みや皺が生じた場合には、前記第2工程で蛇腹状に折り畳んだ第1扇形基布11の前端縁側部位16の折り畳み量が多くなるように、その折り畳み量を調節する。これにより、エアバッグ1の第1扇形基布11をガス導入開口部4側に引っ張ることができ、エアバッグ1に生じた弛みや皺を解消することができる。   In the fourth step, for example, when the airbag 1 is folded in a bellows shape toward the gas introduction opening 4 and the airbag 1 is slackened or wrinkled, it is folded in a bellows shape in the second step. However, the amount of folding is adjusted so that the amount of folding of the front edge portion 16 of the first sector base fabric 11 is increased. Thereby, the 1st fan-shaped base fabric 11 of the airbag 1 can be pulled to the gas introduction opening part 4 side, and the slack and wrinkle which arose in the airbag 1 can be eliminated.

更に、エアバッグ1の折り畳み体18をガス導入開口部4の裏面上に載置した後、その折り畳み体18の上に、前記第3工程で蛇腹状に折り畳んだフラップ帯片6を載置する(図10を参照)。そして最後に、エアバッグ1及びフラップ帯片6を上方から強く押さえ付けながら、ガス導入開口部4の後端に取り付けたラッピングシート7をエアバッグ1及びフラップ帯片6の上方から被せ、同ラッピングシート7の先端をガス導入開口部4の前端側に固定する。これにより、エアバッグ1の折り崩れを防いで、図11に示すように全体が略直方体状に折り畳まれたエアバッグ1が得られる。   Further, after the folding body 18 of the airbag 1 is placed on the back surface of the gas introduction opening 4, the flap strip 6 folded in a bellows shape in the third step is placed on the folding body 18. (See FIG. 10). Finally, while firmly pressing the airbag 1 and the flap strip 6 from above, the wrapping sheet 7 attached to the rear end of the gas introduction opening 4 is covered from above the airbag 1 and the flap strip 6 and the wrapping is performed. The front end of the sheet 7 is fixed to the front end side of the gas introduction opening 4. As a result, the airbag 1 is prevented from collapsing, and the airbag 1 is obtained that is folded into a substantially rectangular parallelepiped shape as shown in FIG.

以上のようにしてエアバッグ1を折り畳むことにより、エアバッグ1に不自然な歪みや皺を生じさせることなく、エアバッグ1を左右対称に且つ全体的にタイトにしっかりと折り畳むことができる。従って、エアバッグ1の折り畳み形態がコンパクトになるとともに、折り畳み状態が非常に安定する。また、エアバッグ1が膨張展開する際には、左右方向に均等で対称的に且つ円滑に膨張展開すると同時に、乗員側に向けても円滑に膨張展開することができるため、意図した所定の方向にエアバッグ1を安定して膨張展開させて、乗員の安全を確実に確保することができる。   By folding the airbag 1 as described above, the airbag 1 can be folded tightly symmetrically and tightly as a whole without causing unnatural distortion and wrinkles in the airbag 1. Therefore, the folded form of the airbag 1 becomes compact and the folded state is very stable. Further, when the airbag 1 is inflated and deployed, the airbag 1 can be inflated and deployed evenly, symmetrically and smoothly in the left-right direction, and at the same time, can be smoothly inflated and deployed toward the occupant side. The airbag 1 can be stably inflated and deployed to ensure the safety of the passenger.

また、本実施形態において折り畳まれたエアバッグ1は、その後、インフレーターを備えたエアバッグ装置のガス噴出部にガス導入開口部4の位置を合わせて、エアバッグ装置の金属製ケース内に収納される。更に、エアバッグ1の上方からエアバッグカバーを装着することにより、エアバッグ装置が組み立てられる。そして、この組み立てられたエアバッグ装置は、車両のインパネの助手席側に搭載される。なお、本発明により折り畳まれたエアバッグ1をエアバッグ装置に組み込んでエアバッグ装置を組み立てる方法や、同エアバッグ1を備えたエアバッグ装置を車両のインパネに搭載する方法は特に限定されず、例えば前記特許文献1に記載されているような公知の方法を用いることができる。   Further, the airbag 1 folded in the present embodiment is then accommodated in a metal case of the airbag device by aligning the position of the gas introduction opening 4 with the gas ejection portion of the airbag device provided with the inflator. The Further, the airbag device is assembled by attaching an airbag cover from above the airbag 1. The assembled airbag device is mounted on the passenger seat side of the instrument panel of the vehicle. The method of assembling the airbag device by incorporating the airbag 1 folded according to the present invention into the airbag device and the method of mounting the airbag device equipped with the airbag 1 on the instrument panel of the vehicle are not particularly limited. For example, a known method as described in Patent Document 1 can be used.

本発明は、自動車等の車両の助手席側に搭載されるエアバッグを折り畳む際に有効に適用される。   The present invention is effectively applied when an airbag mounted on a passenger seat side of a vehicle such as an automobile is folded.

エアバッグを膨張展開させたときの状態を示す斜視図である。It is a perspective view which shows a state when an airbag is inflate-deployed. (a)は、同エアバッグを構成する第1扇形基布及び第2扇形基布からなる布材の裁断図であり、(b)は、同エアバッグを構成する乗員対向側基布の布材の裁断図である。(A) is a cutting figure of the cloth material which consists of the 1st fan-shaped base fabric and the 2nd fan-shaped base fabric which comprise the airbag, (b) is the cloth of the passenger | crew opposing side base fabric which comprises the airbag It is a cutting figure of material. (a)は、第1工程においてエアバッグの乗員対向側基布を表側で一面に広げて平坦に折り畳んだ状態を示す正面図であり、(b)は、(a)に示したA−A線の断面図である。(A) is the front view which shows the state which spread the passenger | crew opposing side base fabric of the airbag in the 1st process on the front side, and was folded flat, (b) is AA shown to (a). It is sectional drawing of a line. (a)は、第1工程において上面部及び下面部を上下に重ね合わせた状態を示す正面図であり、(b)は、(a)に示したB−B線の断面図である。(A) is a front view which shows the state which piled up the upper surface part and the lower surface part up and down in the 1st process, (b) is sectional drawing of the BB line shown to (a). (a)は、第2工程において折り畳まれたエアバッグを示す正面図であり、(b)は、ガス導入開口部の裏側に第1扇形基布が折り込まれている状態を示す断面図であり、(c)は、(a)に示したC−C線の断面図である。(A) is a front view which shows the airbag folded in the 2nd process, (b) is sectional drawing which shows the state by which the 1st fan-shaped base fabric is folded in the back side of a gas introduction opening part. (C) is sectional drawing of CC line shown to (a). 第3工程において、第1扇形基布の左右両側部を幅方向中心線に向けて内側に谷折りにし、エアバッグ1の表裏面を反転させた状態を示す正面図である。In a 3rd process, it is a front view which shows the state which carried out the valley fold of the left and right both sides of the 1st fan-shaped base fabric toward the center line in the width direction, and reversed the front and back of the airbag 1. FIG. (a)は、第3工程終了後のエアバッグを示す斜視図であり、(b)は、(a)に示したD−D線の断面図である。(A) is a perspective view which shows the airbag after completion | finish of a 3rd process, (b) is sectional drawing of the DD line shown to (a). 第4工程において、エアバッグをガス導入開口部とは反対側の先端部から蛇腹状に折り畳んだ状態を示す斜視図である。In a 4th process, it is a perspective view which shows the state which folded the airbag from the front-end | tip part on the opposite side to a gas introduction opening part in the shape of a bellows. 第4工程において、折り畳み体をガス導入開口部の裏面上に載置した状態を示す断面図である。In a 4th process, it is sectional drawing which shows the state which mounted the folding body on the back surface of a gas introduction opening part. 第4工程において、フラップ帯片を折り畳み体の上に載置した状態を示す断面図である。In a 4th process, it is sectional drawing which shows the state which mounted the flap strip on the folding body. ラッピングシートによりエアバッグ及びフラップ帯片を固定した状態を示す断面図である。It is sectional drawing which shows the state which fixed the airbag and the flap strip with the wrapping sheet. 予備折り工程の折り方を示す斜視図である。It is a perspective view which shows how to fold in a preliminary | backup folding process. (a)は、横折り工程において二つ折りをした際のエアバッグを示す正面図であり、(b)は、(a)に示したE−E線の断面図である。(A) is a front view which shows the airbag at the time of folding in half in a horizontal folding process, (b) is sectional drawing of the EE line shown to (a). (a)は、横折り工程における後方側部位のロール折りを示す正面図であり、(b)は、横折り工程における前方側部位の蛇腹折りを示す正面図である。(A) is a front view which shows roll folding of the back side site | part in a horizontal folding process, (b) is a front view which shows bellows folding of the front side site | part in a horizontal folding process. (a)は、横折り工程終了後のエアバッグを示す正面図であり、(b)は、(a)に示したF−F線の断面図である。(A) is a front view which shows the airbag after a horizontal folding process completion | finish, (b) is sectional drawing of the FF line | wire shown to (a). (a)は、縦折り工程終了後のエアバッグを示す正面図であり、(b)は、(a)に示したG−G線の断面図である。(A) is a front view which shows the airbag after completion | finish of a vertical folding process, (b) is sectional drawing of the GG line shown to (a).

符号の説明Explanation of symbols

1 エアバッグ
2 上面部
3 下面部
4 ガス導入開口部
4a 開口
4b ボルト
4c リテーナ
5 ベントホール
6 フラップ帯片
7 ラッピングシート
8 左右側面部
9 乗員対向面部
10 前端縁
11 第1扇形基布
11a 基端部
11b 側縁部
11c 円弧部
12 第2扇形基布
12a 基端部
12b 側縁部
12c 円弧部
13 乗員対向側基布
13a 上半部周縁
13b 下半部周縁
14 タワー部
15 先端部
16 前端縁側部位
17 ガス導入開口部の左右側方の部位
18 折り畳み体
DESCRIPTION OF SYMBOLS 1 Airbag 2 Upper surface part 3 Lower surface part 4 Gas introduction opening part 4a Opening 4b Bolt 4c Retainer 5 Vent hole 6 Flap strip 7 Wrapping sheet 8 Right and left side part 9 Passenger facing surface part 10 Front edge 11 1st fan-shaped base cloth 11a Base Part 11b Side edge part 11c Arc part 12 Second fan-shaped base cloth 12a Base end part 12b Side edge part 12c Arc part 13 Passenger-facing side base cloth 13a Upper half peripheral edge 13b Lower half peripheral part 14 Tower part 15 Front end part 16 Front end edge side Part 17 Part on the left and right sides of the gas introduction opening 18 Folded body

Claims (5)

上面部(2)と、前記上面部(2)とはフロントウインド側の前端縁(10)で連繋され、前記前端縁(10)側にガス導入開口部(4)を有する下面部(3)と、前記上面部(2)及び前記下面部(3)の左右側縁に連繋された左右の各側面部(8)と、前記上面部(2)、前記下面部(3)、及び前記左右側面部(8)の各乗員側端縁に連繋された乗員対向面部(9)とを備え、乗員に向けて錐体状又は錐台状に膨張展開することが可能なエアバッグ(1)を折り畳む方法であって、
前記左右側面部(8)を前記エアバッグ(1)の左右幅方向にそれぞれ引っ張って山折りに折り畳むとともに前記乗員対向面部(9)を前記上面部(2)と前記下面部(3)との間へ谷折りに折り込むことにより、前記上面部(2)及び前記下面部(3)を上下に重ね合わせるように前記エアバッグ(1)を平坦に折り畳む第1工程と、
前記ガス導入開口部(4)を前記上面部側表面に折り返すとともに、同折り返しによって前記ガス導入開口部(4)の裏側に折り込まれる前記上面部(2)の前端縁側部位(16)を、前記ガス導入開口部(4)の前端縁(10)側へ引き出して蛇腹状に折り畳み、更に、同折り畳みによって前記上面部(2)の幅方向中心部分で弛緩する基布を二等辺三角形状に平坦に折り畳む第2工程と、
前記エアバッグ(1)の幅方向の長さが前記ガス導入開口部(4)の幅と等しくなるように、前記エアバッグ(1)の幅方向へ膨出している左右両側部を中心線に向けて谷折りにして前記エアバッグ(1)を細長状に折り畳む第3工程と、
前記細長状のエアバッグ(1)を、前記ガス導入開口部(4)とは反対側の先端部(15)から前記ガス導入開口部(4)に向けて蛇腹状又はロール状に折り畳み、その折り畳んだ折り畳み体(18)を前記ガス導入開口部(4)の裏面上に載置する第4工程と、
を含むことを特徴とするエアバッグの折り畳み方法。
The upper surface portion (2) and the upper surface portion (2) are connected by a front edge (10) on the front window side, and a lower surface portion (3) having a gas introduction opening (4) on the front edge (10) side. Left and right side surfaces (8) connected to the left and right side edges of the upper surface (2) and the lower surface (3), the upper surface (2), the lower surface (3), and the left and right An air bag (1) that includes an occupant facing surface portion (9) connected to each occupant side edge of the side surface portion (8), and that can be inflated and deployed in a cone shape or a frustum shape toward the occupant. A folding method,
The left and right side surfaces (8) are pulled in the left-right width direction of the airbag (1) and folded into mountain folds, and the occupant facing surface (9) is formed between the upper surface (2) and the lower surface (3). A first step of flatly folding the airbag (1) so that the upper surface portion (2) and the lower surface portion (3) are vertically stacked by folding into a valley fold in between,
The gas introduction opening (4) is folded back to the upper surface portion side surface, and the front end edge side portion (16) of the upper surface portion (2) is folded to the back side of the gas introduction opening (4) by the folding. Pull out the gas introduction opening (4) to the front edge (10) side and fold it into a bellows shape.Furthermore, the base fabric that relaxes at the center in the width direction of the upper surface (2) by the folding is flat in an isosceles triangle shape. A second step of folding into
The left and right sides that bulge in the width direction of the airbag (1) are centered so that the length in the width direction of the airbag (1) is equal to the width of the gas introduction opening (4). A third step of folding the airbag (1) into a slender shape by folding it toward the valley;
The elongated airbag (1) is folded in a bellows shape or a roll shape from the tip (15) opposite to the gas introduction opening (4) toward the gas introduction opening (4), A fourth step of placing the folded body (18) on the back surface of the gas introduction opening (4);
A method for folding an airbag, comprising:
前記第2工程において、前記ガス導入開口部(4)を前記上面部側へ折り返した際に、前記ガス導入開口部(4)の左右側方の部位(17)を同ガス導入開口部(4)の裏側に折り込むことを含む請求項1記載のエアバッグの折り畳み方法。   In the second step, when the gas introduction opening (4) is folded back toward the upper surface, the left and right side portions (17) of the gas introduction opening (4) are formed in the gas introduction opening (4 The method for folding an airbag according to claim 1, further comprising: 前記エアバッグ(1)が、前記ガス導入開口部(4)に取付けられた前記エアバッグ(1)を保護するための細長状のフラップ帯片(6)と、前記エアバッグ(1)及び前記フラップ帯片(6)を固定し、前記エアバッグ(1)の膨張展開時に破断可能なラッピングシート(7)とを備えてなり、
前記フラップ帯片(6)を長さ方向に蛇腹状に折り畳むこと、
前記第4工程で前記ガス導入開口部(4)の裏面上に載置した前記折り畳み体(18)の上に、前記フラップ帯片(6)を載置すること、
前記エアバッグ(1)と前記フラップ帯片(6)とを、前記ラッピングシート(7)で上方から包んで固定すること、
を含む請求項1又は2記載のエアバッグの折り畳み方法。
The airbag (1) has an elongated flap strip (6) for protecting the airbag (1) attached to the gas introduction opening (4), the airbag (1), and the airbag A flap strip (6) is fixed, and comprises a wrapping sheet (7) that can be broken when the airbag (1) is inflated and deployed.
Folding the flap strip (6) into a bellows in the length direction;
Placing the flap strip (6) on the folded body (18) placed on the back surface of the gas introduction opening (4) in the fourth step;
Wrapping and fixing the airbag (1) and the flap strip (6) from above with the wrapping sheet (7),
The method for folding an airbag according to claim 1 or 2, further comprising:
請求項1〜3のいずれかに記載の折り畳み方法により折り畳まれた前記エアバッグ(1)の前記ガス導入開口部(4)をエアバッグ装置のガス噴出部の位置に合わせて、前記エアバッグ(1)を前記エアバッグ装置の金属製ケース内に収納することを特徴とするエアバッグ装置の組立て方法。   The airbag (1) is folded by the folding method according to any one of claims 1 to 3, the gas introduction opening (4) is aligned with the position of the gas ejection portion of the airbag device, the airbag ( A method for assembling an airbag device, wherein 1) is housed in a metal case of the airbag device. 請求項1〜3のいずれかに記載の折り畳み方法により折り畳まれた形態を有してなることを特徴とするエアバッグ。
The airbag which has the form folded by the folding method in any one of Claims 1-3, The airbag characterized by the above-mentioned.
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