JP4884067B2

JP4884067B2 - Airbag

Info

Publication number: JP4884067B2
Application number: JP2006122438A
Authority: JP
Inventors: 康悟長澤; 忠雄鹿沼
Original assignee: Nihon Plast Co Ltd
Current assignee: Nihon Plast Co Ltd
Priority date: 2006-04-26
Filing date: 2006-04-26
Publication date: 2012-02-22
Anticipated expiration: 2026-04-26
Also published as: JP2007290622A

Description

本発明は、例えば、自動車の衝突時に乗員を保護するエアバッグに関する。 The present invention relates to an airbag that protects an occupant, for example, in a car collision.

従来、ガスを導入して膨張展開するエアバッグについて、自動車の車室の側部の窓部などに沿って展開するいわゆるカーテンエアバッグが知られている。この種のエアバッグは、車室の側部と乗員との間の空間に所定の厚さ寸法で広い面積に展開する必要がある。そこで、対向する基布同士を複数カ所で縫い合わせるなどして、展開時の厚さ寸法を規制している。 2. Description of the Related Art Conventionally, an airbag that is inflated and deployed by introducing a gas is known as a so-called curtain airbag that is deployed along a window portion or the like of a side portion of a vehicle cabin. This type of airbag needs to be spread over a wide area with a predetermined thickness in the space between the side of the passenger compartment and the occupant. Therefore, the thickness dimension at the time of unfolding is regulated by sewing the opposing base fabrics at a plurality of locations.

この点、エアバッグの内側に基布を配置し、この基布により、エアバッグの内側を多数の分室に区画する構成が知られている(例えば、特許文献１参照。)。この特許文献１の構成では、エアバッグの内側に配置される中間基布は、エアバッグの外殻を構成する本体基布の内側をいわばジグザグに仕切る状態で配置されるとともに、ジャガード織りなどの袋織りにより、本体基布と一体的に構成されている。しかしながら、一般に、袋織りは、平織りの部分と多層織りの部分との境界部分で、例えば半分あるいは３分の１など、糸数が大きく変化するため、基布の織目からガスが抜けやすくなるとともに、強度が低くなる傾向がある。このため、袋織りを用いる構成では、気密性を高めるためのコーティングを基布に施す必要があるとともに、強度の高い糸を用いる必要があり、エアバッグの製造コストの低減が容易でないとともに、エアバッグを小さく折り畳んで収納することが容易でない問題を有している。 In this regard, a configuration is known in which a base fabric is arranged inside the airbag, and the inside of the airbag is partitioned into a number of compartments by this base fabric (see, for example, Patent Document 1). In the configuration of Patent Document 1, the intermediate base fabric arranged inside the airbag is arranged in a state of dividing the inside of the main body base fabric constituting the outer shell of the airbag into a so-called zigzag, It is configured integrally with the main body base fabric by bag weaving. However, in general, in bag weaving, the number of yarns greatly changes, for example, half or one third, at the boundary between a plain weave portion and a multi-layer weave portion. , The strength tends to be low. For this reason, in the configuration using the bag weave, it is necessary to apply a coating for improving the airtightness to the base fabric, and it is necessary to use a high-strength yarn, and it is not easy to reduce the manufacturing cost of the airbag. There is a problem that it is not easy to fold and store the bag.

また、エアバッグの内側に配置される中間基布について、エアバッグの外殻を構成する本体基布とは別体の基布を用いる構成が考えられるが、袋状をなすエアバッグの内側に配置される中間基布について、複数カ所で外殻をなす本体基布に縫い合わせて結合する構成は煩雑であるとともに、強固に縫い合わせるためには多数の針穴が形成され、縫製部分の気密性が低下しやすい問題を有している。この点、縫製部分にシール材を組み合わせて気密性を向上する構成が考えられるが、縫製のみを行う構成に比べてさらに製造工程が煩雑になり、製造コストが上昇する問題を有している。 In addition, regarding the intermediate base fabric disposed inside the airbag, a configuration using a base fabric separate from the main body base fabric constituting the outer shell of the airbag is conceivable. The arrangement of the intermediate base fabric to be sewn and joined to the main body base fabric forming the outer shell at a plurality of locations is complicated, and a large number of needle holes are formed in order to sew together firmly, and the airtightness of the sewing portion is increased. It has a problem that tends to decrease. In this regard, a configuration in which a sealing material is combined with the sewing portion to improve the airtightness is conceivable, but the manufacturing process is further complicated as compared with a configuration in which only the sewing is performed, and there is a problem that the manufacturing cost increases.

一方、内側の中間基布を外殻の本体基布に接着により結合する構成が考えられるが、単に接着する構成では、エアバッグの展開時の圧力に抗して結合を保持する構成は容易でない問題を有している。
特開２００４−２６８８８０号公報（第３−４頁、図４） On the other hand, a configuration in which the inner intermediate base fabric is bonded to the main body base fabric of the outer shell by bonding is conceivable. However, in the configuration in which the inner base fabric is simply bonded, it is not easy to maintain the bonding against the pressure when the airbag is deployed. Have a problem.
JP 2004-268880 A (page 3-4, FIG. 4)

上記従来のように、エアバッグの外殻をなす本体基布と、内側に配置される中間基布とを、縫製により強固に結合しシール材で気密性を向上する構成では、製造工程が煩雑になり、製造コストが上昇する問題を有している。一方、内側の中間基布を外殻の本体基布に接着により結合する構成では、エアバッグの展開時の圧力に抗して結合を保持する構成は容易でない問題を有している。 As in the conventional case, in the configuration in which the main body base fabric forming the outer shell of the airbag and the intermediate base fabric disposed on the inner side are firmly bonded by sewing and the airtightness is improved by the sealing material, the manufacturing process is complicated. Therefore, there is a problem that the manufacturing cost increases. On the other hand, in the configuration in which the inner intermediate base fabric is bonded to the main body base fabric of the outer shell by bonding, there is a problem that it is not easy to maintain the connection against the pressure when the airbag is deployed.

本発明は、このような点に鑑みなされたもので、外殻をなす基布の内側に別体の基布を配置するとともに製造コストを低減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 reduce manufacturing cost while arrange | positioning a separate base fabric inside the base fabric which makes an outer shell .

請求項１記載のエアバッグは、第１の基布部と、この第１の基布部に重ねられて、この第１の基布部とともにガスが導入されて膨張展開する気室の外殻を構成する第２の基布部と、これら第１および第２の基布部とは別体をなし、これら第１および第２の基布部との間の第１の幅寸法の空間を区画する複数の仕切片部、及び、これら仕切片部に連続し、前記第１の幅寸法より大きい第２の幅寸法を有し端部が前記仕切片部の縁部から延設された延設部となる複数の接合片部を備えた第３の基布部と、少なくとも一部が前記延設部に位置して前記接合片部と前記第１および第２の基布部とを接合する接合手段とを具備し、前記第３の基布部は、前記第１の基布部に接合される前記接合片部を設けた第１の仕切基布と、前記第２の基布部に接合される前記接合片部を設けた第２の仕切基布とを備え、これら第１の仕切基布及び第２の仕切基布は、前記接合片部と略平行をなして、互いに接合される中間接合片部を備えたものである。 The airbag according to claim 1 is a first base fabric portion and an outer shell of an air chamber that is overlapped with the first base fabric portion and inflated and deployed by introducing a gas together with the first base fabric portion. And the first and second base fabric portions are separated from each other, and a space having a first width dimension between the first and second base fabric portions is formed. A plurality of partition piece parts to be partitioned, and an extension that is continuous with these partition piece parts and has a second width dimension larger than the first width dimension, and an end part extending from an edge of the partition piece part. A third base fabric portion having a plurality of joint piece portions to be provided portions, and at least a part of the third base fabric portion is positioned in the extended portion to join the joint piece portion and the first and second base fabric portions. The third base cloth part includes a first partition base cloth provided with the joining piece part joined to the first base cloth part, and the second base cloth part. Joined to A second partition base cloth provided with the joint piece portion, and the first partition base cloth and the second partition base cloth are substantially parallel to the joint piece portion and joined to each other. A joining piece portion is provided .

そして、この構成では、第１および第２の基布部で外殻が構成される気室の内側を、これら第１および第２の基布部に接合される第３の基布部で区画することにより、所望の厚さ寸法で膨張展開する展開特性の良好なエアバッグが提供される。第３の基布部は、第１および第２の基布部とは別体とすることにより、構成が簡略化され、製造コストが低減される。接合手段を用いて第１および第２の基布部のいずれか一方に接合される各接合片部は、仕切片部の第１の幅寸法より大きい第２の幅寸法とされ、端部が仕切片部の縁部から延設された延設部とされているため、接合手段の少なくとも一部を延設部に位置させることにより、接合手段の端部に接合を引き剥がす力から集中して加わらず、接合手段を簡略化しても、十分な強度で接合が可能になり、製造工程を簡略化し、製造コストが低減される。さらに、第３の基布部は、第１の基布部に接合される接合片部を設けた第１の仕切基布と、第２の基布部に接合される接合片部を設けた第２の仕切基布とを備え、これら第１の仕切基布及び第２の仕切基布は、前記接合片部と略平行をなして、互いに接合される中間接合片部を備えたため、第１および第２の基布部の間で第３の基布部が襞状に広がり、エアバッグの略全域について所望の厚さ寸法を確保することが容易になる。第３の基布部は、構造が簡略で、製造コストの抑制が可能になる。 In this configuration, the inside of the air chamber in which the outer shell is configured by the first and second base fabric portions is partitioned by the third base fabric portion joined to the first and second base fabric portions. By doing so, an airbag having a good deployment characteristic that is inflated and deployed at a desired thickness is provided. By making the third base fabric portion separate from the first and second base fabric portions, the configuration is simplified and the manufacturing cost is reduced. Each joining piece part joined to either one of the first and second base fabric parts using the joining means has a second width dimension larger than the first width dimension of the partition piece part, and the end part is Since it is an extended portion that extends from the edge of the partition piece portion, by positioning at least a part of the joining means on the extending portion, the force concentrated on the end of the joining means is concentrated from the force that peels off the joining. Even if the joining means is simplified, joining with sufficient strength becomes possible, the manufacturing process is simplified, and the manufacturing cost is reduced. Further, the third base cloth part is provided with a first partition base cloth provided with a joint piece part joined to the first base cloth part and a joint piece part joined to the second base cloth part. A second partition base fabric, and the first partition base fabric and the second partition base fabric are provided with intermediate joint piece portions that are substantially parallel to the joint piece portion and joined to each other. The third base fabric portion spreads in a bowl shape between the first and second base fabric portions, and it becomes easy to secure a desired thickness dimension for substantially the entire area of the airbag. The third base fabric portion has a simple structure and can reduce the manufacturing cost.

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、エアバッグは、車両の車室の側部に沿って車体と車両の乗員との間に展開し、第１の基布部及び第２の基布部の一方は車体に沿って展開する外側基布であり、第１の基布部及び第２の基布部の他方は乗員側に展開する内側基布であるものである。 The airbag according to claim 2 is the airbag according to claim 1, wherein the airbag is deployed between a vehicle body and a vehicle occupant along a side portion of the vehicle compartment, and the first base fabric portion. And one of the second base fabric portions is an outer base fabric that develops along the vehicle body, and the other of the first base fabric portion and the second base fabric portion is an inner base fabric that develops on the passenger side. is there.

そして、請求項１記載の構成を備えるため、車両の車室の側部に沿って所定の厚さ寸法で広い面積に展開させることが可能となり、車体と車両の乗員との間に展開するエアバッグとして好適な構成が提供される。 And since it has the structure of Claim 1, it becomes possible to expand | deploy to a large area with a predetermined | prescribed thickness dimension along the side part of the vehicle interior of a vehicle, and air expand | deployed between a vehicle body and the passenger | crew of a vehicle A configuration suitable as a bag is provided .

請求項３記載のエアバッグは、請求項１または２記載のエアバッグにおいて、中間接合片部は、端部に前記仕切片部の縁部から延設された中間延設部を備え、少なくとも一部がこの中間延設部に位置して互いに接合されたものである。 Airbag according to claim 3, wherein, in the airbag according to claim 1 or 2, wherein the middle bonding piece is provided with an intermediate extension portion that extends from an edge of the partition piece to the end, at least a The parts are located at the intermediate extension part and joined together.

そして、この構成では、第１の仕切基布と第２の仕切基布とを接合した第３の基布部について、接合部分の構成の簡略化が可能になり、製造コストの抑制が可能になる。 And in this structure, about the 3rd base fabric part which joined the 1st partition base cloth and the 2nd partition base cloth, the simplification of the structure of a junction part is attained, and suppression of manufacturing cost is attained. Become.

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、接合手段は接着手段であるものである。 The airbag according to claim 4 is the airbag according to any one of claims 1 to 3, wherein the joining means is an adhesive means.

そして、この構成では、請求項１ないし３いずれか一記載の構成を備え、接合手段の端部に接合を引き剥がす力から集中して加わらないため、接合手段を接着手段としても、十分な強度で接合が可能になり、縫製に比べて製造工程を簡略化し、製造コストが低減される。 Further, in this configuration, since the configuration according to any one of claims 1 to 3 is provided and it does not concentrate on the end of the joining means from the force that peels off the joining, sufficient strength can be obtained even if the joining means is used as an adhesive means. As a result, joining is possible, and the manufacturing process is simplified and manufacturing costs are reduced compared to sewing.

本発明のエアバッグによれば、第１および第２の基布部で外殻が構成される気室の内側を、これら第１および第２の基布部に接合される第３の基布部で区画することにより、所望の厚さ寸法で膨張展開する展開特性の良好なエアバッグを提供できる。第３の基布部は、第１および第２の基布部とは別体とすることにより、構成を簡略化し、製造コストを低減できる。接合手段を用いて第１および第２の基布部のいずれか一方に接合される各接合片部は、仕切片部の第１の幅寸法より大きい第２の幅寸法とされ、端部が仕切片部の縁部から延設された延設部とされているため、接合手段の少なくとも一部を延設部に位置させることにより、接合手段の端部に接合を引き剥がす力から集中して加わらず、接合手段を簡略化しても、十分な強度で接合が可能になり、製造工程を簡略化し、製造コストを低減できる。 According to the airbag of the present invention, the third base fabric is joined to the inside of the air chamber in which the outer shell is constituted by the first and second base fabric portions, to the first and second base fabric portions. By partitioning with a portion, an airbag with good deployment characteristics that is inflated and deployed with a desired thickness can be provided. By making the third base fabric portion separate from the first and second base fabric portions, the configuration can be simplified and the manufacturing cost can be reduced. Each joining piece part joined to either one of the first and second base fabric parts using the joining means has a second width dimension larger than the first width dimension of the partition piece part, and the end part is Since it is an extended portion that extends from the edge of the partition piece portion, by positioning at least a part of the joining means on the extending portion, the force concentrated on the end of the joining means is concentrated from the force that peels off the joining. In spite of this, even if the joining means is simplified, joining can be performed with sufficient strength, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

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、車両としての自動車の車室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、サイドエアバッグ、インフレータブルカーテンタイプ、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、側面衝突などの衝撃を受けた際に、ガスの流入により、乗員の側方の窓部に沿って、すなわち乗員と車室側部の窓部との間に面状に展開し、被保護物である乗員を保護するようになっている。 In FIG. 1, reference numeral 1 denotes an airbag, and an airbag apparatus including the airbag 1 is disposed on a roof side portion of a passenger compartment of an automobile as a vehicle. And this airbag 1 is also called a curtain airbag, a side impact airbag, a side airbag, an inflatable curtain type, or a head protection airbag, and when subjected to an impact such as a side collision, Due to the inflow of gas, it develops in a planar shape along the side window of the occupant, that is, between the occupant and the window part on the side of the passenger compartment, thereby protecting the occupant as the object to be protected. .

また、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、常時は窓部の縁部であるルーフサイドレー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に細長く折り畳んで収納されたエアバッグ１と、後席の乗員の車体上方に収納されこのエアバッグ１にガスを供給する図示しないインフレータとなどを備え、ブラケットを介してルーフサイドレールに取り付けられている。 In addition, the airbag device is a so-called front and rear seat airbag that can protect the passengers in the front and rear seats, and is always surrounded by a roof side rail and a head lining that are edges of the window portion. The airbag 1 is housed in a slenderly folded manner, and an inflator (not shown) that is stored above the vehicle body of the passenger in the rear seat and supplies gas to the airbag 1, and is attached to the roof side rail via a bracket. Yes.

そして、このエアバッグ１は、袋状をなすエアバッグ本体３を備え、このエアバッグ本体３が、ガスが導入される気室４の外殻を構成している。そして、このエアバッグ本体３は、１枚又は複数の基布を縫合して扁平な袋状に形成され、本実施の形態では、２枚の基布(メインパネル)で構成される基布部としての第１の基布部11と第２の基布部12とを重ね合わせ、外周接合部14で外周部を接合し、内部に気室４を有する袋状に形成されている。すなわち、基布部は、車体の窓部に沿って展開する外側基布すなわち窓側基布である第１の基布部11と、乗員側すなわち車室内に面して展開する内側基布(車内側基布)である第２の基布部12とを備え、これら基布部11，12の外周部が、後端部のガス導入部の部分を除き、外周接合部14で略気密に縫い合わされている。 And this airbag 1 is provided with the airbag main body 3 which makes | forms a bag shape, and this airbag main body 3 comprises the outer shell of the air chamber 4 in which gas is introduce | transduced. The airbag body 3 is formed into a flat bag shape by stitching one or a plurality of base fabrics, and in the present embodiment, a base fabric portion composed of two base fabrics (main panels). The first base fabric portion 11 and the second base fabric portion 12 are overlapped, the outer peripheral joint portion 14 is joined to the outer peripheral portion, and the air chamber 4 is formed inside. That is, the base fabric portion includes an outer base fabric that extends along the window portion of the vehicle body, that is, a first base fabric portion 11 that is a window side base fabric, and an inner base fabric that extends toward the passenger side, that is, the vehicle interior (vehicle A second base fabric portion 12 which is an inner base fabric), and the outer peripheral portions of these base fabric portions 11 and 12 are sewn in a substantially airtight manner at the outer peripheral joint portion 14 except for the gas introduction portion at the rear end portion. Are combined.

そして、エアバッグ本体３の内側の気室４は、中空部である膨張部となり、この膨張部は、エアバッグ本体３の前後方向である長手方向の中央部の上部に位置する連通部21と、この連通部21の前側に連通する前席保護部22と、この連通部21の後側に連通する図示しない後席保護部とを備えている。また、連通部21の下方には、第１の基布部11のみにて形成される非膨張部25が形成されている。また、各基布部11，12の内面には、必要に応じてシリコーンなどのコーティング剤が塗布されている。 The air chamber 4 inside the airbag main body 3 becomes an inflatable portion that is a hollow portion, and this inflatable portion is connected to a communication portion 21 that is located at the upper portion of the longitudinal central portion that is the longitudinal direction of the airbag main body 3. A front seat protecting part 22 communicating with the front side of the communicating part 21 and a rear seat protecting part (not shown) communicating with the rear side of the communicating part 21 are provided. A non-expandable portion 25 formed only by the first base fabric portion 11 is formed below the communication portion 21. Further, a coating agent such as silicone is applied to the inner surfaces of the respective base fabric portions 11 and 12 as necessary.

また、外周接合部14は、ガス導入部の部分を除いて基布部11，12の外周部を互いに糸を用いた縫い線27で縫い合わせるとともに、これら縫い線27の気室４側に位置して、シール材28を配置して、気密に構成されている。このシール材28は、例えば基布あるいは合成樹脂などにて形成された細長いシート状すなわちテープ状の部材を断面Ｕ字状に曲げ、基布部11，12に向かう面に基布部11，12に接着される接着部を設けて構成されている。 Further, the outer peripheral joining portion 14 is sewn to the outer peripheral portions of the base fabric portions 11 and 12 by a sewing line 27 using a thread except for the gas introduction portion, and is located on the air chamber 4 side of the sewing line 27. Thus, the sealing material 28 is arranged to form an airtight structure. This sealing material 28 is formed by bending a long sheet-like or tape-like member formed of, for example, a base cloth or a synthetic resin into a U-shaped cross section, and facing the base cloth parts 11 and 12 on the base cloth parts 11 and 12. Is provided with an adhesive portion to be adhered to the substrate.

また、エアバッグ本体３の上縁部には、ブラケットへ取り付けのための取付部である取付片30が所定間隔で複数形成されている。そして、各取付片30は、各基布部11，12の一方あるいは両方を延設し、また折り返すなどして形成されている。また、各取付片30には、それぞれビスなどの取付手段が取り付けられる通孔30aが形成されている。 A plurality of attachment pieces 30 that are attachment portions for attachment to the bracket are formed on the upper edge portion of the airbag body 3 at a predetermined interval. Each attachment piece 30 is formed by extending one or both of the base fabric portions 11 and 12 and turning them back. Each attachment piece 30 is formed with a through hole 30a to which attachment means such as a screw is attached.

さらに、エアバッグ本体３の気室４の内側、すなわち、第１の基布部11と第２の基布部12との間には、前席保護部22及び後席保護部に位置して、これら基布部11，12とは別体をなし、これら基布部11，12に接合手段31で接合される第３の基布部33が配置され、いわゆるラメラバッグが構成されている。この第３の基布部33は、第１の基布部11と第２の基布部12とを連結するとともに、気室４の上下方向に沿った幅寸法のうちの一部を仕切って区画し、窓部に沿った複数の分室である副気室34を形成し、エアバッグ本体３の展開時の厚さ寸法(図５に示すＤ)を規制するとともに、乗員を受け止めた際の反力や展開状態の維持などの展開特性を向上するようになっている。 Further, the air bag body 3 is positioned inside the air chamber 4, that is, between the first base cloth part 11 and the second base cloth part 12, in the front seat protection part 22 and the rear seat protection part. The base fabric portions 11 and 12 are separated from each other, and a third base fabric portion 33 that is joined to the base fabric portions 11 and 12 by the joining means 31 is arranged to constitute a so-called lamella bag. The third base cloth part 33 connects the first base cloth part 11 and the second base cloth part 12 and partitions a part of the width dimension along the vertical direction of the air chamber 4. The sub air chamber 34 which is a plurality of compartments along the window portion is formed, and the thickness dimension (D shown in FIG. 5) of the airbag body 3 when it is deployed is regulated and the occupant is received. The deployment characteristics such as reaction force and maintenance of the deployment state are improved.

そして、第３の基布部33は、図１ないし図６に示すように、第１の仕切基布41と第２の仕切基布42との２枚の基布を接合して構成されている。そして、これら仕切基布41，42は、互いに同じ形状をなし、気室４の上下方向に沿った幅寸法より小さい第１の幅寸法Ｗ1の空間を区画する複数の仕切片部44と、これら仕切片部44と連続して仕切片部44同士の間に配置された接合片部46及び中間接合片部47とを備えている。なお、この実施の形態では、仕切基布41，42は、両端部近傍に接合片部46が設けられ、中間部は、接合片部46と中間接合片部47とが交互に形成されている。また、気室４の上下方向に沿った幅寸法に応じて、前端部の上下方向に沿った寸法は他の部分より小さく形成されている。また、第１の仕切基布41と第２の仕切基布42との前後の端部からは、接合片部46から前後に突設された端片部46aが形成されている。 As shown in FIGS. 1 to 6, the third base cloth portion 33 is formed by joining two base cloths, a first partition base cloth 41 and a second partition base cloth 42. Yes. The partition base fabrics 41 and 42 have the same shape as each other, and a plurality of partition piece portions 44 that partition a space having a first width dimension W1 smaller than the width dimension along the vertical direction of the air chamber 4, A joining piece portion 46 and an intermediate joining piece portion 47 that are arranged between the partition piece portions 44 and the partition piece portions 44 are provided. In this embodiment, the partition base fabrics 41 and 42 are provided with the joining piece portions 46 in the vicinity of both end portions, and the joining piece portions 46 and the intermediate joining piece portions 47 are alternately formed in the intermediate portion. . Further, the dimension along the vertical direction of the front end portion is formed smaller than the other part according to the width dimension along the vertical direction of the air chamber 4. Further, from the front and rear end portions of the first partition base cloth 41 and the second partition base cloth 42, end piece portions 46a projecting forward and backward from the joining piece portion 46 are formed.

そして、これら接合片部46と中間接合片部47は、気室４の上下方向に沿った幅寸法に沿った方向を長手方向とする片状をなして互いに平行に形成され、中間接合片部47は、仕切片部44の第１の幅寸法Ｗ1と同じ寸法に形成されているとともに、接合片部46は、仕切片部44の第１の幅寸法Ｗ1より大きい第２の幅寸法Ｗ2で形成されている。すなわち、接合片部46は、上下の両端部が仕切片部44の縁部から所定の寸法(図３に示すＥ)だけ延設された延設部48として形成されている。そして、これら仕切基布41，42は、各中間接合片部47同士を中間接合手段50で互いに接合するとともに、第１の仕切基布41の接合片部46を接合手段31で第１の基布部11に接合し、第２の仕切基布42の接合片部46を接合手段31で第２の基布部12に接合して、エアバッグ本体３の所定の位置に取り付けられている。 The joining piece portion 46 and the intermediate joining piece portion 47 are formed in parallel with each other in the form of a piece whose longitudinal direction is along the width dimension along the vertical direction of the air chamber 4. 47 is formed in the same dimension as the first width dimension W1 of the partition piece portion 44, and the joining piece portion 46 has a second width dimension W2 larger than the first width dimension W1 of the partition piece portion 44. Is formed. That is, the joining piece portion 46 is formed as an extended portion 48 in which both upper and lower end portions are extended from the edge of the partition piece portion 44 by a predetermined dimension (E shown in FIG. 3). The partition base fabrics 41 and 42 join the intermediate joint piece portions 47 to each other by the intermediate joint means 50 and the joint piece portion 46 of the first partition base cloth 41 to the first base member by the joint means 31. Joined to the fabric portion 11, the joining piece portion 46 of the second partition base fabric 42 is joined to the second base fabric portion 12 by the joining means 31 and attached to a predetermined position of the airbag body 3.

そして、各中間接合片部47同士を接合する中間接合手段50は、糸を用いた縫製線により構成されている。 And the intermediate joining means 50 which joins each intermediate joining piece part 47 is comprised by the sewing line using a thread | yarn.

また、接合片部46を第１または第２の基布部11，12に接合する接合手段31は、接着剤を用いた接着手段により構成されている。さらに、各接合手段31は、全体として直線状に形成されているとともに、少なくとも一部、本実施の形態では全ての両端の端部は、延設部48まで延長されて位置し、すなわち接合手段31の幅寸法は、仕切片部44の第１の幅寸法Ｗ1より大きく、また、接合片部46の第２の幅寸法Ｗ2とほぼ同じかあるいは若干小さく形成されている。 Further, the joining means 31 for joining the joining piece part 46 to the first or second base cloth part 11 or 12 is constituted by an adhesive means using an adhesive. Furthermore, each joining means 31 is formed in a straight line as a whole, and at least a part, in this embodiment, all end portions of both ends are extended to the extending portion 48, that is, the joining means. The width dimension 31 is larger than the first width dimension W1 of the partition piece portion 44, and is substantially the same as or slightly smaller than the second width dimension W2 of the joining piece portion 46.

さらに、図３などに示すように、延設部48に位置する接合手段31の両端の端部31aは、円形状などに形成され、他の部分31bに比べて、接合面積すなわち接着面積が大きく、より大きい接合強度が確保されている。 Further, as shown in FIG. 3 and the like, the end portions 31a at both ends of the joining means 31 located in the extending portion 48 are formed in a circular shape or the like, and have a larger joining area, that is, an adhesion area than the other portions 31b. Greater bonding strength is ensured.

また、図示しないが、必要に応じて、このエアバッグ本体３の前端部には、紐状の基布であるテンションストラップが取り付けられ、エアバッグ本体３の内側には、ガスを案内する筒状のインナチューブなどが配置される。 Although not shown, a tension strap, which is a string-like base fabric, is attached to the front end portion of the airbag body 3 as necessary, and a cylindrical shape for guiding gas is provided inside the airbag body 3. An inner tube or the like is arranged.

次に、このエアバッグ１の製造工程を説明する。 Next, the manufacturing process of this airbag 1 is demonstrated.

まず、第１の基布部11、第２の基布部12、第１の仕切基布41、及び第２の仕切基布42などの基布を、長尺の基布がロール状に巻かれた素材ロールである原反から切り出す。 First, the base fabric such as the first base fabric portion 11, the second base fabric portion 12, the first partition base fabric 41, and the second partition base fabric 42 is wound in a roll shape. Cut out from the original material roll.

そして、第１の仕切基布41と第２の仕切基布42とを各中間接合片部47同士を接合して第３の基布部33を構成する。 And the 1st partition base cloth 41 and the 2nd partition base cloth 42 join each intermediate joining piece part 47, and the 3rd base cloth part 33 is comprised.

次いで、この第３の基布部33の両外側面の接合片部46に接着材を塗布し、接合手段31を形成する。 Next, an adhesive is applied to the joining piece portions 46 on both outer side surfaces of the third base fabric portion 33 to form the joining means 31.

そして、この第３の基布部33を第１の基布部11と第２の基布部12との間に挟み込み、ローラなどの治具で押圧し、各接合片部46の接合手段31を第１の基布部11及び第２の基布部12に接着して接合する。 Then, the third base cloth part 33 is sandwiched between the first base cloth part 11 and the second base cloth part 12 and pressed with a jig such as a roller to join the joining means 31 of each joining piece part 46. Are bonded and bonded to the first base cloth part 11 and the second base cloth part 12.

また、互いに重ね合わせる第１の基布部11と第２の基布部12の外周部近傍にシール材28を配置するとともに、シール材28の外周側に若干離間した位置を縫合し外周接合部14を形成することにより、エアバッグ本体３が構成され、さらに、テンションストラップなどを取り付けて、エアバッグ１が構成される。 In addition, the seal material 28 is disposed in the vicinity of the outer peripheral portions of the first base fabric portion 11 and the second base fabric portion 12 that are overlapped with each other, and the outer peripheral joint portion is sewn at a position slightly separated from the outer peripheral side of the seal material 28. By forming 14, the airbag body 3 is configured, and further, a tension strap or the like is attached to configure the airbag 1.

これらの作業は、手作業により、あるいは自動機械である治具により行われる。 These operations are performed manually or by a jig that is an automatic machine.

そして、このエアバッグ１を所定の形状に折り畳み、インフレータなどを接続して、エアバッグ装置が構成される。 Then, the airbag 1 is folded into a predetermined shape and an inflator or the like is connected to constitute an airbag device.

そして、このエアバッグ装置を備えた自動車が側面衝突などした際には、センサを備えた制御装置の制御により、インフレータが起動し、エアバッグ１の気室４にガスが導入される。すると、このガスは、第３の基布部33の上下を通って気室４の全体に供給され、気室４が膨張展開する。この際、図４及び図５に示すように、第３の基布部33が両側方向にいわば襞状(ラメラ状)に開いて複数の副気室34を形成し、エアバッグ本体３の展開時の厚さ寸法Ｄすなわち乗員側への突出寸法が各部で略均一になるように規制するとともに、気室４内のガスの動きを規制する。 And when the automobile provided with this airbag apparatus carries out a side collision etc., an inflator starts by control of the control apparatus provided with the sensor, and gas is introduce | transduced into the air chamber 4 of the airbag 1. FIG. Then, this gas passes through the upper and lower parts of the third base cloth portion 33 and is supplied to the entire air chamber 4 so that the air chamber 4 expands and develops. At this time, as shown in FIGS. 4 and 5, the third base fabric portion 33 is opened in a so-called saddle shape (lamella shape) in both directions to form a plurality of auxiliary air chambers 34, and the airbag body 3 is deployed. The thickness dimension D at the time, that is, the dimension protruding to the occupant side is regulated so as to be substantially uniform in each part, and the movement of gas in the air chamber 4 is regulated.

なお、図５及び図６に示すように、エアバッグ１が厚さ寸法Ｄで展開した状態では、気室４の上端部から第３の基布部33の仕切片部44の上端すなわち副気室34の上端までの基布部11，12に沿った寸法Ｌは、Ｌ＝πＤ／４で表される。 As shown in FIGS. 5 and 6, in the state where the airbag 1 is deployed with the thickness dimension D, the upper end of the partition piece portion 44 of the third base fabric portion 33 from the upper end portion of the air chamber 4, that is, the auxiliary air. The dimension L along the base fabric portions 11 and 12 up to the upper end of the chamber 34 is represented by L = πD / 4.

このように、本実施の形態によれば、エアバッグ１の内側の気室４に、第３の基布部33を配置し、この第３の基布部33でエアバッグ本体３を構成する第１の基布部11と第２の基布部12とを接合したため、エアバッグ１の展開時の厚さ寸法Ｄを保護領域の略全体にわたって容易に所望の寸法とし、エアバッグ１のストロークを均一にできる。また、第１の仕切基布41と第２の仕切基布42とを各中間接合片部47で接合した第３の基布部33は、エアバッグ１の展開時に襞状に開いて複数の副気室34を形成し、ガスの移動を規制して、前後の端部などの反力を容易に確保することができる。 Thus, according to the present embodiment, the third base fabric portion 33 is arranged in the air chamber 4 inside the airbag 1, and the airbag body 3 is configured by the third base fabric portion 33. Since the first base fabric portion 11 and the second base fabric portion 12 are joined, the thickness dimension D when the airbag 1 is deployed is easily set to a desired dimension over substantially the entire protection region, and the stroke of the airbag 1 is set. Can be made uniform. In addition, the third base cloth portion 33 in which the first partition base cloth 41 and the second partition base cloth 42 are joined by the respective intermediate joint piece portions 47 is opened in a bowl shape when the airbag 1 is deployed, and a plurality of pieces are provided. By forming the auxiliary air chamber 34, the movement of the gas is restricted, and the reaction force such as the front and rear ends can be easily secured.

また、第３の基布部33を第１の基布部11と第２の基布部12とに接合する接合手段31は、仕切片部44の縁部から突出する延設部48まで延長されて形成されているため、仕切片部44から伝わる力が接合手段31の端部31aに集中せず、接合手段31への応力集中を緩和し、端部31aからの剥がれを防止できる。そこで、接合手段31は、接着剤などの接着手段のみにて形成することもでき、強固な縫製を行う構成に比べ、製造工程を容易にして製造コストを低減できるとともに、針穴を削減あるいはなくして、ガスの漏出を抑制し、エアバッグ１の内圧を容易に比較的長時間維持することができる。 The joining means 31 for joining the third base cloth part 33 to the first base cloth part 11 and the second base cloth part 12 extends to the extending part 48 protruding from the edge of the partition piece part 44. Therefore, the force transmitted from the partition piece portion 44 is not concentrated on the end portion 31a of the joining means 31, and the stress concentration on the joining means 31 is alleviated and peeling from the end portion 31a can be prevented. Therefore, the joining means 31 can also be formed only by an adhesive means such as an adhesive, and compared with a configuration in which strong sewing is performed, the manufacturing process can be simplified and the manufacturing cost can be reduced, and the needle holes can be reduced or eliminated. Thus, leakage of gas can be suppressed, and the internal pressure of the airbag 1 can be easily maintained for a relatively long time.

さらに、接合手段31の端部31aは、他の部分31bより接合面積すなわち接着面積が大きく、より大きい接合強度を確保したため、全体としての接着材などの接着手段の量を増加させることなく、接合強度を確保できる。 Furthermore, the end 31a of the bonding means 31 has a larger bonding area, that is, a bonding area than the other portion 31b, and has secured a larger bonding strength. Therefore, the bonding means 31 can be bonded without increasing the amount of bonding means such as an adhesive as a whole. Strength can be secured.

また、第３の基布部33を第１の基布部11及び第２の基布部12とは別体にしたため、ジャガード織りなどの袋織りでは不可能あるいは困難な構造を容易に実現し、製造コストを低減できるとともに、小さく折り畳んで収納可能な構成にできる。 In addition, since the third base cloth part 33 is separated from the first base cloth part 11 and the second base cloth part 12, a structure that is impossible or difficult with bag weaving such as jacquard weaving is easily realized. The manufacturing cost can be reduced, and the structure can be folded and stored.

また、エアバッグ１の内圧を容易に高い状態に容易に維持できるため、インフレータの出力を低減し、製造コストを低減することが可能になる。 Moreover, since the internal pressure of the airbag 1 can be easily maintained at a high level, the output of the inflator can be reduced and the manufacturing cost can be reduced.

なお、上記の実施の形態では、接合手段31の端部31aを円形状としたが、この構成に限られず、他の部分31bより接合面積すなわち接着面積を大きくする構成とできる。例えば、図７に示すように、円形状の端部31aが他の部分31bに滑らかに連接する形状とし、あるいは、図８に示すように、他の部分31bの端部から直交する方向に延設されて略Ｔ字状とした端部31aを形成することもできる。 In the above embodiment, the end 31a of the joining means 31 is circular. However, the present invention is not limited to this configuration, and the joining area, that is, the bonding area can be made larger than that of the other portion 31b. For example, as shown in FIG. 7, the circular end portion 31a is smoothly connected to the other portion 31b, or as shown in FIG. 8, it extends in the direction orthogonal to the end portion of the other portion 31b. It is also possible to form an end 31a that is provided and has a substantially T-shape.

また、接合手段31は、接着手段のみで形成する他、接着手段と糸を用いた縫製との組み合わせ、あるいは、糸を用いた縫製のみで形成することもできる。このように接合手段31を縫製とする場合でも、接合手段31の端部31aを延設部48に配置することにより、応力集中を緩和できるため、縫製を簡易なものとし、製造コストを低減できるとともに、針穴を少なくあるいは小さくして、針穴からのガスの漏れを抑制できる。 Further, the joining means 31 can be formed not only by the bonding means but also by a combination of the bonding means and sewing using a thread, or only by sewing using a thread. Even when the joining means 31 is sewn in this way, the stress concentration can be alleviated by arranging the end 31a of the joining means 31 in the extending portion 48, so that the sewing can be simplified and the manufacturing cost can be reduced. At the same time, the number of needle holes can be reduced or reduced to suppress gas leakage from the needle holes.

例えば、図９に示すように、接合手段31の円形の端部31aの部分のみ、円環状などの縫製部31cにより補強し、直線状の他の部分31bは接着手段のみとすることもできる。また、図１０に示すように、直線状の他の部分31bも縫製により形成し、この縫製の端末部を囲むように、円環状の縫製部である端部31aを形成することもできる。 For example, as shown in FIG. 9, only the circular end portion 31a of the joining means 31 may be reinforced by a sewing portion 31c such as an annular shape, and the other linear portion 31b may be only the bonding means. Further, as shown in FIG. 10, the other linear portion 31b can also be formed by sewing, and an end portion 31a, which is an annular sewing portion, can be formed so as to surround the sewing terminal portion.

また、第３の基布部33を第１の基布部11と第２の基布部12とに接合する接合片部46の構成と同様に、第１の仕切基布41と第２の仕切基布42とを接合する中間接合片部47についても、幅寸法を仕切片部44の第１の幅寸法Ｗ1より大きく設定し、接合強度の向上を図ることができる。すなわち、図１１に示すように、中間接合片部47についても、仕切片部44の縁部から上下に突出する中間延設部52を形成し、この中間延設部52の縁部まで糸を用いた縫製線などの中間接合手段50を形成することにより、第１の仕切基布41と第２の仕切基布42との接合強度を向上できる。 Similarly to the configuration of the joining piece portion 46 that joins the third base fabric portion 33 to the first base fabric portion 11 and the second base fabric portion 12, the first partition base fabric 41 and the second base fabric portion 33 are connected. Also for the intermediate joint piece 47 that joins the partition base fabric 42, the width dimension can be set larger than the first width dimension W1 of the partition piece part 44 to improve the joint strength. That is, as shown in FIG. 11, the intermediate joint piece 47 also has an intermediate extension portion 52 that protrudes up and down from the edge portion of the partition piece portion 44, and the yarn extends to the edge portion of the intermediate extension portion 52. By forming the intermediate joining means 50 such as a sewing line used, the joining strength between the first partition base cloth 41 and the second partition base cloth 42 can be improved.

また、上記の各実施の形態では、２枚の基布を接合して第３の基布部33を形成したが、この構成に限られず、３枚以上の基布を重ねて接合し、第３の基布部33を構成することもできる。 In each of the above embodiments, two base fabrics are joined to form the third base fabric portion 33. However, the present invention is not limited to this configuration, and three or more base fabrics are stacked and joined. 3 base fabric portions 33 can also be configured .

また、従来、第１及び第２の基布部11，12などの基布を切り出す素材ロールである原反は、幅寸法が１５４mmのものを利用しているが、この幅寸法より大きい幅寸法Ａの原反を用いることにより、効率良く基布を切り出し、製造コストを低減することができる。 Conventionally, the material roll which is a material roll for cutting out the base fabric such as the first and second base fabric portions 11 and 12 uses a material roll having a width dimension of 154 mm. However, the width dimension is larger than this width dimension. By using the raw material of A, the base fabric can be efficiently cut out and the manufacturing cost can be reduced.

例えば、幅寸法Ａが１８８mmの原反61を用いることにより、図１２に示すように、幅方向に沿って３枚の第１及び第２の基布部11，12を取り出すことが可能であり、また、図１３に示すように、原反の幅方向を長手方向として、第１及び第２の基布部11，12を取り出すことが可能であり、あるいは、図１４に示すように、第１及び第２の基布部11，12の間から、第１の仕切基布41と第２の仕切基布42を取り出すことが可能であり、無駄が少なく効率の良い材料取りにより、製造コストを低減できる。また、幅寸法Ａが１８８mmの原反61であれば、幅方向を長手方向として、テンションストラップなどを取り出すこともできる。 For example, by the width dimension A is used raw 61 188 mm, can be taken out as shown in FIG. 1 2, the first and second base fabric portions 11, 12 of the three along the width direction There, and as shown in FIG. 1 3, the width direction of the original sheet as the longitudinal direction, it is possible to take out the first and second base fabric portions 11 and 12, or, as shown in FIG. 1 4 In addition, it is possible to take out the first partition base cloth 41 and the second partition base cloth 42 from between the first and second base cloth portions 11 and 12, and it is possible to reduce the waste and to make efficient materials. Manufacturing cost can be reduced. If the width A is 188 mm, the tension strap or the like can be taken out with the width direction as the longitudinal direction.

また、上記の各実施の形態では、自動車の車室の側部に備えられ窓部などを覆ういわゆるカーテンエアバッグについて説明したが、この構成に限られず、自動車あるいは自動車以外の移動体などに備えられる種々のエアバッグ装置に適用できる。 Further, in each of the above embodiments, a so-called curtain airbag that is provided in a side portion of a vehicle compartment and covers a window or the like has been described. However, the present invention is not limited to this configuration, and is provided in a vehicle or a moving body other than a vehicle. The present invention can be applied to various airbag devices.

本発明は、例えば、自動車の車室の側部に設けられ、自動車の衝突時に膨張展開して乗員を保護するエアバッグに適用できる。 The present invention can be applied to, for example, an airbag that is provided on a side portion of a passenger compartment of an automobile and that inflates and deploys to protect an occupant when the automobile collides.

本発明のエアバッグの一実施の形態を示す一部を切り欠いた一部の斜視図である。It is the one part perspective view which notched the part which shows one Embodiment of the airbag of this invention. 同上エアバッグの第３の基布部の説明図である。It is explanatory drawing of the 3rd base fabric part of an airbag same as the above. 同上第３の基布部の一部を拡大した説明図である。It is explanatory drawing which expanded a part of 3rd base fabric part same as the above. 同上エアバッグの展開状態を示す説明図である。It is explanatory drawing which shows the expansion | deployment state of an airbag same as the above. 同上エアバッグの展開状態を示す図４のＩ矢視図である。It is an I arrow line view of Drawing 4 showing the deployment state of an airbag same as the above. 同上エアバッグの一部の説明図である。It is explanatory drawing of a part of airbag same as the above. 本発明のエアバッグの他の実施の形態を示す第３の基布部の一部を拡大した説明図である。It is explanatory drawing which expanded a part of 3rd base fabric part which shows other embodiment of the airbag of this invention. 本発明のエアバッグのさらに他の実施の形態を示す第３の基布部の一部を拡大した説明図である。It is explanatory drawing which expanded a part of 3rd base fabric part which shows other embodiment of the airbag of this invention. 本発明のエアバッグのさらに他の実施の形態を示す第３の基布部の一部を拡大した説明図である。It is explanatory drawing which expanded a part of 3rd base fabric part which shows other embodiment of the airbag of this invention. 本発明のエアバッグのさらに他の実施の形態を示す第３の基布部の説明図である。It is explanatory drawing of the 3rd base fabric part which shows other embodiment of the airbag of this invention. 本発明のエアバッグのさらに他の実施の形態を示す第３の基布部の説明図である。 It is explanatory drawing of the 3rd base fabric part which shows other embodiment of the airbag of this invention . 本発明のエアバッグの製造工程を示す説明図である。It is explanatory drawing which shows the manufacturing process of the airbag of this invention. 本発明のエアバッグの他の製造工程を示す説明図である。It is explanatory drawing which shows the other manufacturing process of the airbag of this invention. 本発明のエアバッグのさらに他の製造工程を示す説明図である。It is explanatory drawing which shows the further another manufacturing process of the airbag of this invention.

１エアバッグ
４気室
11 第１の基布部
12 第２の基布部
31 接合手段
33 第３の基布部
41 第１の仕切基布
42 第２の仕切基布
44 仕切片部
46 接合片部
47 中間接合片部
48 延設部
52 中間延設部
Ｗ1 第１の幅寸法
Ｗ2 第２の幅寸法 1 Airbag 4 Air chamber
11 First base fabric
12 Second base fabric
31 Joining means
33 Third base fabric
41 First divider base fabric
42 Second divider base fabric
44 Partition
46 Joint piece
47 Intermediate joint piece
48 Extension
52 Intermediate extension part W1 1st width dimension W2 2nd width dimension

Claims

第１の基布部と、
この第１の基布部に重ねられて、この第１の基布部とともにガスが導入されて膨張展開する気室の外殻を構成する第２の基布部と、
これら第１および第２の基布部とは別体をなし、これら第１および第２の基布部との間の第１の幅寸法の空間を区画する複数の仕切片部、及び、これら仕切片部に連続し、前記第１の幅寸法より大きい第２の幅寸法を有し端部が前記仕切片部の縁部から延設された延設部となる複数の接合片部を備えた第３の基布部と、
少なくとも一部が前記延設部に位置して前記接合片部と前記第１および第２の基布部とを接合する接合手段とを具備し、
前記第３の基布部は、前記第１の基布部に接合される前記接合片部を設けた第１の仕切基布と、前記第２の基布部に接合される前記接合片部を設けた第２の仕切基布とを備え、これら第１の仕切基布及び第２の仕切基布は、前記接合片部と略平行をなして、互いに接合される中間接合片部を備えた
ことを特徴とするエアバッグ。 A first base fabric part;
A second base fabric portion which is superimposed on the first base fabric portion and constitutes an outer shell of an air chamber in which gas is introduced and inflated and deployed together with the first base fabric portion;
A plurality of partition piece portions that are separate from the first and second base fabric portions, and define a space having a first width dimension between the first and second base fabric portions, and these A plurality of joining piece portions that are continuous with the partition piece portion, have a second width dimension larger than the first width dimension, and have an end portion extending from an edge portion of the partition piece portion. A third base fabric portion;
A joining means for joining at least a part of the joining piece part and the first and second base cloth parts located in the extended part;
Said third base fabric section, the first partition group and fabric, wherein the joint piece that is joined to the second base cloth portion provided with the first base cloth portion the joint piece to be joined to The first partition base cloth and the second partition base cloth are provided with intermediate joint piece portions that are joined to each other substantially parallel to the joint piece portion. features and to Rue airbag that was.

エアバッグは、車両の車室の側部に沿って車体と車両の乗員との間に展開し、第１の基布部及び第２の基布部の一方は車体に沿って展開する外側基布であり、第１の基布部及び第２の基布部の他方は乗員側に展開する内側基布である
ことを特徴とする請求項１記載のエアバッグ。 The airbag is deployed between the vehicle body and the vehicle occupant along the side of the vehicle cabin, and one of the first base fabric portion and the second base fabric portion is deployed on the outer base along the vehicle body. 2. The airbag according to claim 1, wherein the airbag is an inner base fabric that is deployed to an occupant side, the other being the first base fabric portion and the second base fabric portion.

中間接合片部は、端部に前記仕切片部の縁部から延設された中間延設部を備え、少なくとも一部がこの中間延設部に位置して互いに接合された
ことを特徴とする請求項１または２記載のエアバッグ。 The intermediate joining piece portion includes an intermediate extending portion extending from an edge portion of the partition piece portion at an end portion, and at least a part of the intermediate joining piece portion is located at the intermediate extending portion and joined to each other. The airbag according to claim 1 or 2 .

接合手段は接着手段である
ことを特徴とする請求項１ないし３いずれか一記載のエアバッグ。 The airbag according to any one of claims 1 to 3, wherein the joining means is an adhesive means.