JP2007186132A - Side airbag device - Google Patents

Side airbag device Download PDF

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Publication number
JP2007186132A
JP2007186132A JP2006006725A JP2006006725A JP2007186132A JP 2007186132 A JP2007186132 A JP 2007186132A JP 2006006725 A JP2006006725 A JP 2006006725A JP 2006006725 A JP2006006725 A JP 2006006725A JP 2007186132 A JP2007186132 A JP 2007186132A
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side airbag
cloth
seat
occupant
end portion
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JP2006006725A
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JP5216191B2 (en
Inventor
Takeshi Kai
健 甲斐
Takashi Aoki
孝志 青木
Kazuhiro Onda
和博 恩田
Rei Sakamoto
玲 坂元
Nobuko Hashikawa
展子 橋川
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag device obtaining a side airbag for suitably protecting an occupant by a simple constitution and reduction of size and weight. <P>SOLUTION: In this side airbag device 20, the side airbag 22 is deployed from a seat rear end part 10a to a seat front end part 10b, and the deployed side airbag 22 is arranged between the occupant 12 and a side door 11, and thereby inside foundation cloth 25 of the side airbag 22 is faced to the occupant 12, and outside foundation cloth 26 is faced to the side door 11. The side airbag 22 is provided with combining cloth 28 for combining the inside foundation cloth 25 and the outside foundation cloth 26 with an interval. A bag width W4 between each of the foundation cloth 25 and 26 combined by the combining cloth 28 is set to be narrowed on the seat front end part 10 side and to be expanded on the seat rear end part 10a side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、乗員の側方に設けられたサイドエアバッグを、シートの後端部から前端部に向けて展開して乗員と車体との間に配置するサイドエアバッグ装置に関する。   The present invention relates to a side airbag device in which a side airbag provided on a side of an occupant is deployed from a rear end portion of a seat toward a front end portion and disposed between the occupant and a vehicle body.

エアバッグ装置のなかには、折り畳んだサイドエアバッグをシートバックに収納し、車両の側部に衝撃が作用した際に、車体の側部と乗員との間にサイドエアバッグを展開させて乗員を保護するサイドエアバッグ装置がある（例えば、特許文献１参照。）。
特開２００５−１１９５１０公報 In the airbag device, the folded side airbag is stored in the seat back, and when an impact is applied to the side of the vehicle, the side airbag is deployed between the side of the vehicle body and the occupant to protect the occupant There is a side airbag device that performs (see, for example, Patent Document 1).
JP 2005-119510 A

特許文献１のサイドエアバッグ装置は、サイドエアバッグが展開した際に、サイドエアバッグの中央部が非膨張部となり、この非膨張部の周囲が膨張部となるように形成されている。
非膨張部は、シートに着座した乗員の腕部に臨む。また、さらに、膨張部は、上端部が乗員の肩部に臨むとともに、下端部が腰部に臨む。
ここで、乗員の腕部は車体側に突出している。この突出している腕部に非膨張部を臨ませることで、乗員に沿わせた状態でサイドエアバッグを展開することが可能になる。 The side airbag device of Patent Document 1 is formed such that when the side airbag is deployed, the central portion of the side airbag becomes a non-inflatable portion, and the periphery of the non-inflatable portion becomes an inflatable portion.
The non-inflatable part faces the arm part of the occupant seated on the seat. Further, the inflatable portion has an upper end facing the occupant's shoulder and a lower end facing the waist.
Here, the arm portion of the occupant protrudes toward the vehicle body. By allowing the non-inflatable portion to face the projecting arm portion, the side airbag can be deployed in a state of being along the occupant.

ところで、乗員がシートに着座した状態において、乗員の腰部はシートの後端部側に位置し、シートの前端部側には乗員の脚部が位置する。
ここで、乗員の体形・体格は様々であり、このような体形・体格の乗員の保護性能を効果的におこなうために、乗員の身体部のうち、腰部を拘束した後、他の身体部を拘束することが考えられる。 By the way, in the state where the occupant is seated on the seat, the occupant's waist is located on the rear end side of the seat, and the occupant's leg is located on the front end side of the seat.
Here, the occupant's body shape and physique vary, and in order to effectively protect the occupant with such body shape and physique, after restraining the lumbar part of the occupant's body part, It can be constrained.

発生した当初の衝撃を腰部で受けるためには、サイドエアバッグのうち、腰部に臨む部位を、他の部位より大きく膨張させる必要がある。
しかし、腰部に臨む部位を、他の部位より大きく膨張させるためには、サイドエアバッグを形成する基布の一部を、例えば立体織りなどで突出させた状態に織る必要がある。
このため、サイドエアバッグの形状が複雑になり、この観点から、改良の余地が残されていた。 In order to receive the generated impact at the waist, it is necessary to inflate the part of the side airbag facing the waist more than the other part.
However, in order to inflate the part facing the waist larger than other parts, it is necessary to weave a part of the base fabric forming the side airbag in a state of projecting with, for example, a three-dimensional weave.
For this reason, the shape of the side airbag becomes complicated, and there remains room for improvement from this viewpoint.

また、サイドエアバッグのうち、腰部に臨む部位を、他の部位より大きく膨張させるためには、インフレータから比較的多量のガスを放出させることが望ましい。よって、インフレータが比較的大きくなることが考えられる。
このため、サイドエアバッグ装置の小型化や軽量化を図ることが難しく、この観点から、改良の余地が残されていた。 Further, in order to inflate a portion of the side airbag facing the lumbar region larger than other portions, it is desirable to release a relatively large amount of gas from the inflator. Therefore, it can be considered that the inflator becomes relatively large.
For this reason, it is difficult to reduce the size and weight of the side airbag device, and there remains room for improvement from this viewpoint.

本発明は、乗員を好適に保護するサイドエアバッグを簡単な構成で得ることができ、かつ小型化や軽量化を図ることができるサイドエアバッグ装置を提供することを課題とする。   An object of the present invention is to provide a side airbag device that can obtain a side airbag that suitably protects an occupant with a simple configuration and that can be reduced in size and weight.

請求項１に係る発明は、シートに着座した乗員の側方にサイドエアバッグを設け、このサイドエアバッグをシートの後端部側から前端部側に向けて展開することで乗員と車体との間に配置し、配置したサイドエアバッグの内側壁部を乗員に臨ませるとともに外側壁部を車体に臨ませるサイドエアバッグ装置において、前記内側壁部および前記外側壁部の間に介在され、各壁部を間隔をおいて結合することで、各壁部間のバッグ幅を、前記シートの前端部側で狭めるとともに前記シートの後端部側で拡げるように設定可能な結合部を備えたことを特徴とする。   According to the first aspect of the present invention, a side airbag is provided on the side of an occupant seated on the seat, and the side airbag is deployed from the rear end portion side to the front end portion side of the seat, thereby In the side airbag device in which the inner side wall portion of the arranged side airbag faces the occupant and the outer side wall portion faces the vehicle body, interposed between the inner side wall portion and the outer side wall portion, By providing a connecting portion that can be set so that the bag width between the wall portions is narrowed on the front end side of the sheet and widened on the rear end side of the sheet by connecting the wall portions at intervals. It is characterized by.

ここで、シートに着座した乗員は、シートバックに上半身が寄りかかっている。よって、乗員の上半身はシートの後端部側に位置する。
そこで、請求項１において、内側壁部および外側壁部を結合部で結合することで、各壁部間のバッグ幅を、シートの前端部側で狭めるとともにシートの後端部側で拡げるように設定した。
なお、乗員の上半身は、腰部を含むものとする。 Here, the occupant seated on the seat has the upper body leaning against the seat back. Therefore, the upper body of the occupant is located on the rear end side of the seat.
Therefore, in claim 1, by connecting the inner wall portion and the outer wall portion with the connecting portion, the bag width between the wall portions is narrowed on the front end portion side of the seat and expanded on the rear end portion side of the seat. Set.
The upper body of the occupant includes the waist.

請求項２において、前記結合部は、布製の部材で、前記シートの後端部側から前端部側に向けて、布幅が徐々に小さくなるように略台形状に形成されたことを特徴とする。   3. The coupling part according to claim 2, wherein the coupling part is a cloth member and is formed in a substantially trapezoidal shape so that the cloth width gradually decreases from the rear end part side to the front end part side of the sheet. To do.

請求項３において、前記サイドエアバッグは、前記バッグ幅を拡げる部位が、前記乗員の腰部に臨むように形成されたことを特徴とする。   In Claim 3, The said side airbag was formed so that the site | part which expands the said bag width may face the said passenger | crew's waist | hip | lumbar part.

ここで、乗員の体形・体格は様々であり、このような体形・体格の乗員の保護性能を効果的におこなうために、乗員の身体部のうち、腰部を拘束した後、他の身体部を拘束することが好ましい。
そこで、請求項３において、サイドエアバッグのうち、バッグ幅を拡げる部位を、乗員の腰部に臨ませた。 Here, the occupant's body shape and physique vary, and in order to effectively protect the occupant with such body shape and physique, after restraining the lumbar part of the occupant's body part, It is preferable to restrain.
Therefore, in claim 3, a part of the side airbag that widens the bag width is made to face the occupant's waist.

請求項１に係る発明では、内側壁部および外側壁部を結合部で結合することで、各壁部間のバッグ幅を、シートの前端部側で狭めるとともにシートの後端部側で拡げるように設定した。シート後端部側は、乗員の上半身に臨む。
よって、シートの後端部側のバッグ幅を、通常のサイドエアバッグのバッグ幅より拡げることで、乗員の上半身を好適に保護することができる。 In the invention according to claim 1, the inner wall portion and the outer wall portion are joined at the joining portion so that the bag width between the wall portions is narrowed on the front end portion side of the seat and expanded on the rear end portion side of the seat. Set to. The rear end of the seat faces the occupant's upper body.
Therefore, the passenger | crew's upper body can be protected suitably by expanding the bag width of the rear-end part side of a sheet | seat from the bag width of a normal side airbag.

加えて、サイドエアバッグ内に結合部を備えるだけの簡単な構成で、シートの後端部側のバッグ幅を、通常のサイドエアバッグのバッグ幅より拡げることができる。
これにより、乗員を好適に保護するサイドエアバッグを簡単な構成で得ることができるという利点がある。 In addition, the bag width on the rear end side of the seat can be made wider than the bag width of a normal side airbag with a simple configuration in which a coupling portion is provided in the side airbag.
Thereby, there exists an advantage that the side airbag which protects a passenger | crew suitably can be obtained with a simple structure.

さらに、シートの前端部側のバッグ幅を、通常のサイドエアバッグのバッグ幅より狭めた。よって、サイドエアバッグの容積を抑えて、サイドエアバッグを比較的少量のガスで迅速に展開することができる。
ガスを比較的少量に抑えることで、ガスを放出するインフレータのコンパクト化が図れ、サイドエアバッグ装置の小型化や軽量化を図ることができるという利点がある。 Further, the bag width on the front end side of the seat was narrower than the bag width of a normal side airbag. Therefore, it is possible to quickly deploy the side airbag with a relatively small amount of gas while suppressing the volume of the side airbag.
By suppressing the gas to a relatively small amount, there is an advantage that the inflator for releasing the gas can be made compact, and the side airbag device can be reduced in size and weight.

請求項２に係る発明では、結合部を略台形状に形成した布製の部材とした。そして、この結合部の布幅を、シートの後端部側から前端部側に向けて徐々に小さくした。
よって、結合部でサイドエアバッグ内を仕切ることで、テーパ状の膨張室を形成することができる。 In the invention which concerns on Claim 2, it was set as the member made from the cloth which formed the connection part in the substantially trapezoid shape. And the cloth width of this joint part was gradually made small toward the front end part side from the rear end part side of the sheet.
Therefore, a tapered expansion chamber can be formed by partitioning the inside of the side airbag with the coupling portion.

この膨張室の容積を、サイドエアバッグ全体の容積と比較して小さく抑えることで、膨張室を比較的少量のガスで展開することができる。
これにより、テーパ状の膨張室を迅速に展開し、展開した膨張室で、乗員を衝撃の発生当初から好適に拘束することができるという利点がある。 By suppressing the volume of the expansion chamber to be smaller than the volume of the entire side airbag, the expansion chamber can be deployed with a relatively small amount of gas.
Thereby, there exists an advantage that a taper-shaped expansion chamber can be expand | deployed rapidly and a passenger | crew can be restrained suitably from the generation | occurrence | production of an impact with the expanded expansion chamber.

請求項３に係る発明では、サイドエアバッグのうち、バッグ幅を拡げる部位を、乗員の腰部に臨ませる。よって、衝撃が発生した際に、発生した衝撃を腰部で受けて、その後他の身体部を受けることができる。
これにより、乗員の身体部にかかる衝撃を、それぞれの身体部に合わせて調整することができるので、乗員を好適に保護することができるという利点がある。 In the invention which concerns on Claim 3, the site | part which expands a bag width is made to face a passenger | crew's waist | hip | lumbar part among side airbags. Therefore, when an impact is generated, the generated impact can be received by the waist and thereafter another body part can be received.
Thereby, since the impact concerning a passenger | crew's body part can be adjusted according to each body part, there exists an advantage that a passenger | crew can be protected suitably.

本発明を実施するための最良の形態を添付図に基づいて以下に説明する。なお、「前」、「後」、「左」、「右」は作業者から見た方向に従い、前側をＦｒ、後側をＲｒ、左側をＬ、右側をＲで示す。
図１は本発明に係るサイドエアバッグ装置を備えた車両用シートを示す斜視図であり、サイドエアバッグ装置を展開した状態を示す。
車両用シート１０は、一例として、車両の側部に設けたサイドドア（車体）１１の左側に所定間隔をおいて設けられ、乗員１２が着座するシートクッション１３と、シートクッション１３の後部に設けたシートバック１４と、シートバック１４の上端部１４ａに設けたヘッドレスト１５とを備える。
シートバック１４の右側部１４ｂには、サイドエアバッグ装置２０が折り畳んだ状態で収納されている。 The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. “Front”, “rear”, “left”, and “right” indicate Fr on the front side, Rr on the rear side, L on the left side, and R on the right side according to the direction seen from the operator.
FIG. 1 is a perspective view showing a vehicle seat provided with a side airbag device according to the present invention, and shows a state in which the side airbag device is deployed.
For example, the vehicle seat 10 is provided at a predetermined interval on the left side of a side door (vehicle body) 11 provided on a side portion of the vehicle, and is provided at a rear portion of the seat cushion 13 on which a passenger 12 sits. The seat back 14 and the headrest 15 provided on the upper end portion 14a of the seat back 14 are provided.
The side airbag device 20 is stored in a folded state in the right side portion 14 b of the seat back 14.

サイドエアバッグ装置２０は、シートバック１４の右側部１４ｂ内にインフレータ２１が収納され、このインフレータ２１にサイドエアバッグ２２の後端部２２ａが取り付けられ、サイドエアバッグ２２が乗員１２の右側方（側方）に設けられたものである。
サイドエアバッグ装置２０は、車両の側部に衝撃が作用したことを検知した際に、インフレータ２１からガスを放出し、放出したガスでサイドエアバッグ２２を膨張展開させて乗員を保護するものである。 In the side airbag device 20, an inflator 21 is accommodated in the right side portion 14 b of the seat back 14, and a rear end portion 22 a of the side airbag 22 is attached to the inflator 21, and the side airbag 22 is positioned on the right side of the occupant 12 ( Side).
The side airbag device 20 protects the occupant by releasing gas from the inflator 21 and inflating and deploying the side airbag 22 with the released gas when it is detected that an impact has acted on the side of the vehicle. is there.

インフレータ２１は、シートバック１４の右側部１４ｂ内に取付ブラケット２３を介して取り付けられ、シートバック１４の右側部１４ｂに沿って上下方向に向けて配置されている。
インフレータ２１から放出したガスをサイドエアバッグ２２に充填する。充填したガスでサイドエアバッグ２２を、乗員１２が着座した車両用シート（シート）１０の後端部１０ａ側から前端部１０ｂ側に向けて展開する。
以下、車両用シート１０の後端部１０ａを、シート後端部１０ａと略記する。また、車両用シート１０の前端部１０ｂを、シート前端部１０ｂと略記する。 The inflator 21 is attached to the right side portion 14b of the seat back 14 via a mounting bracket 23, and is arranged along the right side portion 14b of the seat back 14 in the vertical direction.
The gas released from the inflator 21 is filled into the side airbag 22. The side airbag 22 is deployed with the filled gas from the rear end portion 10a side of the vehicle seat (seat) 10 on which the occupant 12 is seated toward the front end portion 10b side.
Hereinafter, the rear end portion 10a of the vehicle seat 10 is abbreviated as a seat rear end portion 10a. Further, the front end portion 10b of the vehicle seat 10 is abbreviated as a seat front end portion 10b.

展開したサイドエアバッグ２２は、サイドドア１１と乗員１２との間に配置される。
よって、サイドエアバッグ２２のうち、内側壁部としての内側基布（織物）２５が乗員１２に臨むとともに、外側壁部としての外側基布２６がサイドドア１１に臨む。 The deployed side airbag 22 is disposed between the side door 11 and the occupant 12.
Therefore, in the side airbag 22, the inner base fabric (woven fabric) 25 as the inner wall portion faces the occupant 12, and the outer base fabric 26 as the outer wall portion faces the side door 11.

図２は本発明に係るサイドエアバッグ装置を展開した状態を示す斜視図、図３は本発明に係るサイドエアバッグ装置を展開した状態を示す分解斜視図である。
サイドエアバッグ２２は、図１に示す乗員１２側に臨む内側基布２５と、図１に示すサイドドア１１に臨む外側基布２６とを縫い合わせて袋体を形成し、この袋体の内部に布製の結合布（結合部）２８を備え、結合布２８で内側基布２５および外側基布２６を間隔をおいて結合し、一対の隔壁基布３２，３３を内側基布２５および外側基布２６間に介在させ、それぞれの基布３２，３３，２５，２６を縫い合わせて隔壁部３１を形成したものである。 FIG. 2 is a perspective view showing a state in which the side airbag device according to the present invention is deployed, and FIG. 3 is an exploded perspective view showing a state in which the side airbag device according to the present invention is deployed.
The side airbag 22 is formed by stitching together an inner base cloth 25 facing the occupant 12 shown in FIG. 1 and an outer base cloth 26 facing the side door 11 shown in FIG. A cloth-made bonding cloth (bonding portion) 28 is provided, and the inner base cloth 25 and the outer base cloth 26 are bonded to each other with a gap therebetween, and the pair of partition base cloths 32 and 33 are connected to the inner base cloth 25 and the outer base cloth. The partition wall portion 31 is formed by sewing the base fabrics 32, 33, 25, and 26.

内側基布２５は、インフレータ２１（図１参照）に取り付ける取付部２５ａを有し、取付部２５ａを除いて外周に折曲片２５ｂを有する。
外側基布２６は、インフレータ２１に取り付ける取付部２６ａを有し、取付部２６ａを除いて外周に折曲片２６ｂを有し、前端部に排気孔用の開口部２６ｃを有する。
内側基布２５の折曲片２５ｂと外側基布２６の折曲片２６ｂとを重ね合わせ、それぞれの縫合部（すなわち、想像線で示す部位）２５ｃ，２６ｄを縫合糸４１で縫い合わせることで袋体を形成する。 The inner base fabric 25 has an attachment portion 25a attached to the inflator 21 (see FIG. 1), and has a bent piece 25b on the outer periphery excluding the attachment portion 25a.
The outer base fabric 26 has an attachment portion 26a attached to the inflator 21, has a bent piece 26b on the outer periphery excluding the attachment portion 26a, and an exhaust hole opening 26c at the front end.
The folded piece 25b of the inner base fabric 25 and the bent piece 26b of the outer base fabric 26 are overlapped, and each stitched portion (that is, a portion indicated by an imaginary line) 25c and 26d is sewn with a suture thread 41 to form a bag. Form.

結合布２８は、内側結合部３５および外側結合部３６が縫い合わされて略台形状に形成された基布である。
この結合布２８は、内側結合部３５の結合片３５ａを内側基布２５に縫い合わせ、外側結合部３６の結合片３６ａを外側基布２６に縫い合わせたものである。
なお、結合布２８については、図４に基づいて詳しく説明する。 The bonding cloth 28 is a base cloth formed in a substantially trapezoidal shape by sewing the inner bonding portion 35 and the outer bonding portion 36 together.
The binding fabric 28 is obtained by sewing the coupling piece 35 a of the inner coupling portion 35 to the inner base fabric 25 and stitching the coupling piece 36 a of the outer coupling portion 36 to the outer base fabric 26.
The connecting cloth 28 will be described in detail with reference to FIG.

一対の隔壁基布３２，３３のうち、一方の隔壁基布３２は、車体前後方向に延びるように楕円形に形成されている。
また、一対の隔壁基布３２，３３のうち、他方の隔壁基布３３は、車体前後方向に延びるように楕円形に形成され、前端部に排気孔用の開口部３３ａを有する。 Of the pair of partition base fabrics 32, 33, one partition base fabric 32 is formed in an elliptical shape so as to extend in the longitudinal direction of the vehicle body.
In addition, of the pair of partition base fabrics 32 and 33, the other partition base fabric 33 is formed in an elliptical shape so as to extend in the longitudinal direction of the vehicle body, and has an opening 33a for exhaust holes at the front end.

一対の隔壁基布３２，３３を重ね合わせるとともに、重ね合わせた一対の隔壁基布３２，３３を内側基布２５および外側基布２６間に介在させる。それぞれの基布３２，３３，２５，２６の縫合部（想像線で示す部位）３２ａ，３３ｂ，２５ｄ，２６ｅを縫合糸４１で縫い合わせて隔壁部３１を形成する。   The pair of partition base fabrics 32 and 33 are overlapped, and the pair of partition partition base fabrics 32 and 33 are interposed between the inner base fabric 25 and the outer base fabric 26. The partition portions 31 are formed by stitching the stitched portions (parts indicated by imaginary lines) 32a, 33b, 25d, and 26e of the respective base fabrics 32, 33, 25, and 26 with the suture thread 41.

さらに、他方の隔壁基布３３の開口部３３ａと、外側基布２６の開口部２６ｃとを重ね合わせ、それぞれの縫合部（想像線で示す部位）３３ｃ，２６ｆを縫合糸４１で縫い合わせる。これにより、開口部３３ａ，２６ｃで排気孔３８が形成される。
この排気孔３８でサイドエアバッグ２２の内部空間３９とサイドエアバッグ２２の外部とを連通する。 Further, the opening 33 a of the other partition base fabric 33 and the opening 26 c of the outer base fabric 26 are overlapped, and the respective stitched portions (portions indicated by imaginary lines) 33 c and 26 f are stitched together by the suture thread 41. Thereby, the exhaust hole 38 is formed by the openings 33a and 26c.
The exhaust hole 38 communicates the internal space 39 of the side airbag 22 with the outside of the side airbag 22.

図４は本発明に係るサイドエアバッグ装置の結合布を説明する図である。
結合布２８の内側結合部３５は、略台形状に形成された基布である。この内側結合部３５は、結合片３５ａの長さがＬ１、連結片３５ｂの長さがＬ２、シート後端部１０ａ側の後端部３５ｃの幅がＷ１、シート前端部１０ｂ側の前端部３５ｄの幅がＷ２に設定されている。
なお、シート後端部１０ａおよびシート前端部１０ｂは、それぞれ図１に示す。 FIG. 4 is a view for explaining a binding fabric of the side airbag device according to the present invention.
The inner coupling portion 35 of the coupling fabric 28 is a base fabric formed in a substantially trapezoidal shape. In the inner coupling portion 35, the length of the coupling piece 35a is L1, the length of the coupling piece 35b is L2, the width of the rear end portion 35c on the seat rear end portion 10a side is W1, and the front end portion 35d on the seat front end portion 10b side. Is set to W2.
The sheet rear end portion 10a and the sheet front end portion 10b are shown in FIG.

結合片３５ａの長さＬ１と、連結片３５ｂの長さＬ２との関係は、Ｌ１＞Ｌ２が成立する。そして、後端部３５ｃを結合片３５ａから連結片３５ｂに向けてテーパ状に形成し、前端部３５ｄを結合片３５ａから連結片３５ｂに向けてテーパ状に形成する。
また、後端部３５ｃの幅Ｗ１と、前端部３５ｄの幅Ｗ２との関係は、Ｗ１＞Ｗ２が成立する。 The relationship between the length L1 of the coupling piece 35a and the length L2 of the coupling piece 35b satisfies L1> L2. Then, the rear end portion 35c is tapered from the coupling piece 35a toward the connecting piece 35b, and the front end portion 35d is tapered from the coupling piece 35a toward the connecting piece 35b.
Further, the relationship between the width W1 of the rear end portion 35c and the width W2 of the front end portion 35d satisfies W1> W2.

結合布２８の外側結合部３６は、内側結合部３５と対称な布部である。
すなわち、外側結合部３６は、略台形状に形成された基布である。この外側結合部３６は、結合片３６ａの長さがＬ１、連結片３６ｂの長さがＬ２、シート後端部１０ａ側の後端部３６ｃの幅がＷ１、シート前端部１０ｂ側の前端部３６ｄの幅がＷ２に設定されている。 The outer coupling portion 36 of the coupling fabric 28 is a fabric portion that is symmetrical with the inner coupling portion 35.
That is, the outer coupling portion 36 is a base fabric formed in a substantially trapezoidal shape. In the outer coupling portion 36, the length of the coupling piece 36a is L1, the length of the coupling piece 36b is L2, the width of the rear end portion 36c on the seat rear end portion 10a side is W1, and the front end portion 36d on the seat front end portion 10b side. Is set to W2.

結合片３６ａの長さＬ１と、連結片３６ｂの長さＬ２との関係は、Ｌ１＞Ｌ２が成立する。そして、後端部３６ｃを結合片３６ａから連結片３６ｂに向けてテーパ状に形成し、前端部３６ｄを結合片３６ａから連結片３６ｂに向けてテーパ状に形成する。
また、後端部３６ｃの幅Ｗ１と、前端部３６ｄの幅Ｗ２との関係は、Ｗ１＞Ｗ２が成立する。 The relationship between the length L1 of the connecting piece 36a and the length L2 of the connecting piece 36b satisfies L1> L2. The rear end portion 36c is tapered from the coupling piece 36a toward the connecting piece 36b, and the front end portion 36d is tapered from the coupling piece 36a toward the connecting piece 36b.
Further, the relationship between the width W1 of the rear end portion 36c and the width W2 of the front end portion 36d satisfies W1> W2.

内側結合部３５の連結片３５ｂと外側結合部３６の連結片３６ｂとを重ね合わせ、それぞれの縫合部（想像線で示す部位）３５ｅ，３６ｅを縫合糸４１で縫い合わせる（図３参照）。それぞれの連結片３５ｂ，３６ｂを縫い合わせることで結合布２８を得る。   The connecting piece 35b of the inner connecting portion 35 and the connecting piece 36b of the outer connecting portion 36 are overlapped, and the respective stitched portions (portions indicated by imaginary lines) 35e and 36e are sewn with the suture thread 41 (see FIG. 3). The connecting cloth 28 is obtained by sewing the connecting pieces 35b and 36b.

図３に戻って、結合布２８は、内側結合部３５および外側結合部３６が縫い合わされて略台形状に形成され、シート後端部１０ａ側の後端部２８ａの幅が２×Ｗ１、シート前端部１０ｂ側の前端部２８ｂの幅が２×Ｗ２に設定されている。シート後端部１０ａおよびシート前端部１０ｂは、それぞれ図１に示す。   Returning to FIG. 3, the binding fabric 28 is formed in a substantially trapezoidal shape by stitching the inner coupling portion 35 and the outer coupling portion 36, and the width of the rear end portion 28 a on the sheet rear end portion 10 a side is 2 × W1. The width of the front end portion 28b on the front end portion 10b side is set to 2 × W2. The sheet rear end portion 10a and the sheet front end portion 10b are shown in FIG.

すなわち、結合布２８は、後端部２８ａから前端部２８ｂに向けて、布幅Ｗ３が徐々に小さくなるように形成されている。
結合布２８の布幅Ｗ３は、後端部２８ａにおいて２×Ｗ１と比較的大きな寸法であり、前端部２８ｂにおいて２×Ｗ２と比較的小さな寸法である。 That is, the connecting cloth 28 is formed so that the cloth width W3 gradually decreases from the rear end portion 28a toward the front end portion 28b.
The fabric width W3 of the joint fabric 28 is a relatively large size of 2 × W1 at the rear end portion 28a and a relatively small size of 2 × W2 at the front end portion 28b.

また、結合布２８は、内側結合部３５の後端部３５ｃおよび外側結合部３６の後端部３６ｃをそれぞれテーパ状に形成することで、後端部２８ａを略Ｖ状の凹み部に形成する。
さらに、結合布２８は、内側結合部３５の前端部３５ｄおよび外側結合部３６の前端部３６ｄをそれぞれテーパ状に形成することで、前端部２８ｂを略Ｖ状の凹み部に形成する。 Further, the binding cloth 28 forms the rear end portion 28a into a substantially V-shaped recess by forming the rear end portion 35c of the inner coupling portion 35 and the rear end portion 36c of the outer coupling portion 36 in a tapered shape. .
Further, the binding cloth 28 forms the front end portion 28b in a substantially V-shaped recess by forming the front end portion 35d of the inner coupling portion 35 and the front end portion 36d of the outer coupling portion 36 in a tapered shape.

この結合布２８は、内側基布２５および外側基布２６を間隔をおいて結合する基布である。
具体的には、内側結合部３５の結合片３５ａと内側基布２５とを重ね合わせ、それぞれの縫合部（想像線で示す部位）３５ｆ，２５ｅを縫合糸４１（図示せず）で縫い合わせる。縫合部３５ｆ，２５ｅは、内側基布２５の下部２５ｆ近傍に位置する。 The binding fabric 28 is a base fabric that connects the inner base fabric 25 and the outer base fabric 26 with a space therebetween.
Specifically, the coupling piece 35a of the inner coupling portion 35 and the inner base fabric 25 are overlapped, and the stitched portions (portions indicated by imaginary lines) 35f and 25e are stitched together with a suture thread 41 (not shown). The stitched portions 35f and 25e are located in the vicinity of the lower portion 25f of the inner base fabric 25.

同様に、外側結合部３６の結合片３６ａと外側基布２６とを重ね合わせ、それぞれの縫合部（想像線で示す部位）３６ｆ，２６ｇを縫合糸４１（図２参照）で縫い合わせる。縫合部３６ｆ，２６ｇは、外側基布２６の下部２６ｈ近傍に位置する。
このように、内側基布２５および外側基布２６を結合布２８で結合した状態において、結合布２８は、後端部２８ａから前端部２８ｂに向けて上り勾配に取り付けられる。 Similarly, the coupling piece 36a of the outer coupling portion 36 and the outer base fabric 26 are overlapped, and the stitched portions (parts indicated by imaginary lines) 36f and 26g are stitched together with the suture thread 41 (see FIG. 2). The stitched portions 36f and 26g are located in the vicinity of the lower portion 26h of the outer base fabric 26.
In this way, in a state where the inner base cloth 25 and the outer base cloth 26 are joined by the joining cloth 28, the joining cloth 28 is attached in an upward gradient from the rear end portion 28a toward the front end portion 28b.

図２に戻って、内側基布２５および外側基布２６を結合布２８で結合することで、結合布２８でサイドエアバッグ２２の内部空間３９を仕切る。
結合布２８でサイドエアバッグ２２の内部空間３９を仕切ることで、サイドエアバッグ２２の下部２２ｂ近傍に下部膨張室（膨張室）４５が形成され、下部膨張室（膨張室）４５の上方に上部膨張室４６が形成される。 Returning to FIG. 2, the inner base cloth 25 and the outer base cloth 26 are joined by the joining cloth 28, whereby the inner space 39 of the side airbag 22 is partitioned by the joining cloth 28.
By partitioning the inner space 39 of the side airbag 22 with the connecting cloth 28, a lower expansion chamber (expansion chamber) 45 is formed in the vicinity of the lower portion 22 b of the side airbag 22, and an upper portion above the lower expansion chamber (expansion chamber) 45. An expansion chamber 46 is formed.

ここで、図１に示すように、車両用シート１０に着座した乗員１２は、シートバック１４に上半身１２ｄが寄りかかっている。よって、乗員１２の上半身１２ｄはシート後端部１０ａ側に位置する。
そこで、結合布２８を、後端部２８ａから前端部２８ｂに向けて、布幅Ｗ３が徐々に小さくなるように形成した。
よって、内側基布２５および外側基布２６を結合布２８で結合することで、下部膨張室４５は、膨張幅が、シート後端部１０ａ側からシート前端部１０ｂ側に向けて徐々に減少するように形成されている。 Here, as shown in FIG. 1, the occupant 12 seated on the vehicle seat 10 has the upper body 12 d leaning against the seat back 14. Therefore, the upper body 12d of the occupant 12 is located on the seat rear end 10a side.
Therefore, the connecting cloth 28 is formed so that the cloth width W3 gradually decreases from the rear end portion 28a toward the front end portion 28b.
Therefore, by connecting the inner base cloth 25 and the outer base cloth 26 with the connecting cloth 28, the expansion width of the lower expansion chamber 45 gradually decreases from the sheet rear end portion 10a side toward the sheet front end portion 10b side. It is formed as follows.

これにより、図５（ａ）に示すように、下部膨張室４５は、内側基布２５および外側基布２６間のバッグ幅Ｗ４が、シート後端部１０ａ側の後側部位４５ａにおいて、結合布２８を用いない通常のサイドエアバッグのバッグ幅と比較して大きくなるように拡げられる。
一方、図５（ｂ）に示すように、下部膨張室４５は、内側基布２５および外側基布２６間のバッグ幅Ｗ４が、シート前端部１０ｂ側の前側部位４５ｂにおいて、結合布２８を用いない通常のサイドエアバッグのバッグ幅と比較して小さく抑えられるように狭められる。 As a result, as shown in FIG. 5A, the lower expansion chamber 45 has a bag width W4 between the inner base fabric 25 and the outer base fabric 26 at the rear portion 45a on the seat rear end portion 10a side. It is expanded so that it may become large compared with the bag width of the normal side airbag which does not use 28.
On the other hand, as shown in FIG. 5 (b), the lower expansion chamber 45 uses the binding cloth 28 in the bag width W4 between the inner base cloth 25 and the outer base cloth 26 at the front portion 45b on the seat front end portion 10b side. It is narrowed to be kept small compared to the bag width of a normal side airbag that is not.

すなわち、後側部位４５ａは、バッグ幅Ｗ４が拡げられて大きくなる部位（バッグ幅Ｗ４を拡げる部位）である。また、前側部位４５ｂは、バッグ幅Ｗ４が狭められて小さく抑えられる部位（バッグ幅Ｗ４を狭める部位）である。   In other words, the rear portion 45a is a portion that is enlarged as the bag width W4 is expanded (a portion that expands the bag width W4). Moreover, the front side part 45b is a part (part which narrows the bag width W4) where the bag width W4 is narrowed and kept small.

シート前端部１０ｂ側のバッグ幅Ｗ４を狭めて小さくすることで、サイドエアバッグ２２の容積を抑えることができる。これにより、サイドエアバッグ２２を比較的少量のガスで迅速に展開することができる。
ガスを比較的少量に抑えることで、ガスを放出するインフレータ２１（図１参照）のコンパクト化が図れ、サイドエアバッグ装置２０の小型化や軽量化を図ることができる。 By narrowing and reducing the bag width W4 on the seat front end 10b side, the volume of the side airbag 22 can be suppressed. Thereby, the side airbag 22 can be rapidly deployed with a relatively small amount of gas.
By suppressing the gas to a relatively small amount, the inflator 21 (see FIG. 1) that releases the gas can be made compact, and the side airbag device 20 can be reduced in size and weight.

また、後側部位４５ａが、シート後端部１０ａ側に位置するので、後側部位４５ａを乗員１２の上半身１２ｄ（特に、腰部１２ａ）に臨ませることができる。
よって、後側部位４５ａのバッグ幅Ｗ４を拡げて大きくすることで、乗員１２の上半身１２ｄ（特に、腰部１２ａ）を好適に保護することができる。
なお、乗員１２の上半身１２ｄは、腰部１２ａを含むものとする。 Further, since the rear portion 45a is positioned on the seat rear end portion 10a side, the rear portion 45a can face the upper body 12d (particularly, the waist portion 12a) of the occupant 12.
Therefore, the upper body 12d (especially the waist 12a) of the occupant 12 can be suitably protected by enlarging and enlarging the bag width W4 of the rear portion 45a.
The upper body 12d of the occupant 12 includes a waist 12a.

さらに、結合布２８でサイドエアバッグ２２内の内部空間３９の一部が下部膨張室４５に仕切られる。
この下部膨張室４５の容積は、サイドエアバッグ２２の上部膨張室４６の容積と比較して小さく抑えられている。よって、下部膨張室４５を比較的少量のガスで迅速に展開させることができる。 Further, a part of the internal space 39 in the side airbag 22 is partitioned by the connecting cloth 28 into the lower expansion chamber 45.
The volume of the lower expansion chamber 45 is kept small compared to the volume of the upper expansion chamber 46 of the side airbag 22. Therefore, the lower expansion chamber 45 can be rapidly deployed with a relatively small amount of gas.

加えて、下部膨張室４５は、シート後端部側のバッグ幅のみを拡げて大きくし、シート前端部側のバッグ幅を狭めて小さく抑えるようにした。
よって、下部膨張室４５を比較的少量のガスで展開させても、シート後端部側のバッグ幅を、結合布２８を用いない通常のサイドエアバッグのバッグ幅と比較して大きく拡げた状態に確保することができる。 In addition, in the lower expansion chamber 45, only the bag width on the seat rear end side is enlarged and enlarged, and the bag width on the seat front end side is narrowed and kept small.
Therefore, even if the lower inflating chamber 45 is deployed with a relatively small amount of gas, the bag width on the seat rear end side is greatly expanded compared to the bag width of a normal side airbag that does not use the binding cloth 28. Can be secured.

ここで、結合布２８は、後端部２８ａが略Ｖ状の凹み部に形成されている。よって、インフレータ２１からガスを放出した際に、放出したガスを下部膨張室４５内に導く第１ガス流路４７が所定の大きさに形成される。
さらに、結合布２８は、前端部２８ｂが略Ｖ状の凹み部に形成されている。よって、下部膨張室４５内にガスが充填された際に、下部膨張室４５内のガスを上部膨張室４６に導く第２ガス流路４８が所定の大きさに形成できる。 Here, the binding cloth 28 has a rear end portion 28a formed in a substantially V-shaped recess. Therefore, when the gas is released from the inflator 21, the first gas flow path 47 that guides the released gas into the lower expansion chamber 45 is formed to a predetermined size.
Further, the connecting cloth 28 has a front end portion 28b formed in a substantially V-shaped recess. Therefore, the second gas flow path 48 that guides the gas in the lower expansion chamber 45 to the upper expansion chamber 46 when the gas is filled in the lower expansion chamber 45 can be formed in a predetermined size.

よって、インフレータ２１からガスが放出された際に、放出されたガスの一部を第１ガス流路４７を経て下部膨張室４５内に良好に導くことができる。そして、下部膨張室４５内に導かれたガスの一部を第２ガス流路４８を経て上部膨張室４６に導くことができる。   Therefore, when the gas is released from the inflator 21, a part of the released gas can be favorably guided into the lower expansion chamber 45 through the first gas flow path 47. A part of the gas guided into the lower expansion chamber 45 can be guided to the upper expansion chamber 46 via the second gas flow path 48.

このように、テーパ状の下部膨張室４５を比較的少量のガスで展開させることができ、かつ、下部膨張室４５内にガスを良好に導くことで、下部膨張室４５を迅速に展開することができる。
そして、展開した下部膨張室４５で、乗員１２（図１参照）を衝撃の発生当初から好適に拘束することができる。 In this way, the tapered lower expansion chamber 45 can be expanded with a relatively small amount of gas, and the gas can be guided well into the lower expansion chamber 45 to rapidly expand the lower expansion chamber 45. Can do.
And the passenger | crew 12 (refer FIG. 1) can be restrained suitably from the generation | occurrence | production of an impact with the expanded lower expansion chamber 45. FIG.

さらに、サイドエアバッグ２２内に結合布２８を備えるだけの簡単な構成で、下部膨張室４５のバッグ幅Ｗ４を、シート後端部１０ａ側において拡げて大きくできる。
これにより、乗員１２を好適に保護するサイドエアバッグ２２を簡単な構成で得ることができる。 Furthermore, the bag width W4 of the lower inflating chamber 45 can be increased and widened on the side of the seat rear end portion 10a with a simple configuration in which only the connecting cloth 28 is provided in the side airbag 22.
Thereby, the side airbag 22 which protects the passenger | crew 12 suitably can be obtained with a simple structure.

図１に戻って、下部膨張室４５のうち、バッグ幅Ｗ４を拡げる後側部位４５ａが、乗員１２の腰部１２ａ（詳しくは、腰部１２ａの右側部１２ｂ）に臨み、バッグ幅Ｗ４を狭める前側部位４５ｂが、乗員１２の脚部１２ｃに臨む。   Returning to FIG. 1, in the lower expansion chamber 45, the rear part 45 a that widens the bag width W <b> 4 faces the waist 12 a of the occupant 12 (specifically, the right side 12 b of the waist 12 a), and the front part that narrows the bag width W <b> 4. 45b faces the leg 12c of the occupant 12.

ここで、下部膨張室４５の後側部位４５ａを腰部１２ａに臨ませた理由について説明する。
すなわち、乗員１２の体形・体格は様々であり、このような体形・体格の乗員１２の保護性能を効果的におこなうために、乗員１２の身体部のうち、腰部１２ａを拘束した後、他の身体部を拘束することが好ましい。
そこで、下部膨張室４５の後側部位４５ａを腰部１２ａに臨ませて乗員１２にかかる衝撃を良好に吸収することにした。 Here, the reason why the rear portion 45a of the lower expansion chamber 45 is faced to the waist 12a will be described.
That is, the occupant 12 has various physiques and physiques, and in order to effectively protect the occupant 12 with such physiques and physiques, after restraining the lumbar part 12a of the body part of the occupant 12, It is preferable to restrain the body part.
Therefore, the rear part 45a of the lower expansion chamber 45 is made to face the waist 12a, so that the impact applied to the occupant 12 is well absorbed.

図５（ａ）は図２の５ａ−５ａ線断面図、図５（ｂ）は図２の５ｂ−５ｂ線断面図、および図５（ｃ）は図５（ａ）のサイドエアバッグが折り畳まれた状態を示す断面図である。
（ａ）に示すように、サイドエアバッグ２２は、内側基布２５の折曲片２５ｂと外側基布２６の折曲片２６ｂとが縫合糸４１で縫い合わされることで袋体が形成される。
内側基布２５および外側基布２６を結合布２８で結合することで、サイドエアバッグ２２の内部空間３９を結合布２８で仕切る。サイドエアバッグ２２の下部２２ｂ近傍に下部膨張室４５を形成する。 5 (a) is a cross-sectional view taken along line 5a-5a in FIG. 2, FIG. 5 (b) is a cross-sectional view taken along line 5b-5b in FIG. 2, and FIG. 5 (c) is a side airbag folded in FIG. FIG.
As shown to (a), the side airbag 22 forms a bag body by the sewing of the bent piece 25b of the inner base fabric 25 and the bent piece 26b of the outer base fabric 26 with the suture thread 41. .
By connecting the inner base cloth 25 and the outer base cloth 26 with the connecting cloth 28, the inner space 39 of the side airbag 22 is partitioned by the connecting cloth 28. A lower expansion chamber 45 is formed in the vicinity of the lower portion 22 b of the side airbag 22.

結合布２８は、後端部２８ａにおいて、布幅Ｗ３が比較的大きい。よって、下部膨張室４５のうち、後側部位４５ａは、内側基布２５および外側基布２６間のバッグ幅Ｗ４が、バッグ幅Ｗ５と比較して大きく拡げられる。
バッグ幅Ｗ５は、結合布２８を用いない通常のサイドエアバッグ５２（想像線で示す）の幅である。
この後側部位４５ａが、腰部１２ａの右側部１２ｂ（図１参照）に臨む。 The binding cloth 28 has a relatively large cloth width W3 at the rear end 28a. Therefore, the bag width W4 between the inner base cloth 25 and the outer base cloth 26 in the rear side portion 45a of the lower expansion chamber 45 is greatly expanded as compared with the bag width W5.
The bag width W5 is the width of a normal side airbag 52 (indicated by an imaginary line) that does not use the binding fabric 28.
The rear portion 45a faces the right side portion 12b (see FIG. 1) of the waist portion 12a.

（ｂ）に示すように、サイドエアバッグ２２は、一対の隔壁基布３２，３３を内側基布２５および外側基布２６間に介在させ、それぞれの基布３２，３３，２５，２６を縫合糸４１で縫い合わせて隔壁部３１が形成される。
結合布２８は、前端部２８ｂにおいて、布幅Ｗ３が比較的小さい。よって、下部膨張室４５のうち、前側部位４５ｂは、内側基布２５および外側基布２６間のバッグ幅Ｗ４が、、バッグ幅Ｗ５と比較して小さく狭められる。
バッグ幅Ｗ５は、結合布２８を用いない通常のサイドエアバッグ５２（想像線で示す）の幅である。 As shown in (b), the side airbag 22 has a pair of partition base fabrics 32, 33 interposed between the inner base fabric 25 and the outer base fabric 26, and the base fabrics 32, 33, 25, 26 are sewn together. The partition wall 31 is formed by sewing with the thread 41.
The binding cloth 28 has a relatively small cloth width W3 at the front end portion 28b. Therefore, in the lower side expansion chamber 45, the front side portion 45b has a bag width W4 between the inner base cloth 25 and the outer base cloth 26 that is narrower than the bag width W5.
The bag width W5 is the width of a normal side airbag 52 (indicated by an imaginary line) that does not use the binding fabric 28.

（ｃ）に示すように、結合布２８は、内側結合部３５と外側結合部３６とを重ね合わせ、それぞれの連結片３５ｂ，３６ｂを縫合糸４１で縫い合わせたものである。
この結合布２８のうち、内側結合部３５の結合片３５ａを内側基布２５に縫合糸４１で縫い合わせ、外側結合部３６の結合片３６ａを外側基布２６に縫合糸４１で縫い合わせる。 As shown in (c), the connecting cloth 28 is obtained by superposing the inner connecting portion 35 and the outer connecting portion 36 and sewing the respective connecting pieces 35b and 36b with the suture thread 41.
Of the joint fabric 28, the joint piece 35 a of the inner joint portion 35 is sewn to the inner base cloth 25 with the suture thread 41, and the joint piece 36 a of the outer joint portion 36 is sewn to the outer base cloth 26 with the suture thread 41.

このように、内側結合部３５と外側結合部３６とを縫い合わせて結合布２８を作ることで、サイドエアバッグ２２を折り畳む際に、連結片３５ｂ，３６ｂの縫合部で結合布２８を良好に折り畳むことができる（図示の状態）。   In this manner, by making the coupling cloth 28 by stitching the inner coupling part 35 and the outer coupling part 36 together, when the side airbag 22 is folded, the coupling cloth 28 is satisfactorily folded at the stitching parts of the connecting pieces 35b and 36b. (State shown).

つぎに、サイドエアバッグ装置２０のサイドエアバッグ２２を展開する例を図６〜図７に基づいて説明する。
図６（ａ），（ｂ）は本発明に係るサイドエアバッグ装置の下部膨張室を展開する状態を示す説明図である。
（ａ）において、インフレータ２１からガスを放出する。放出したガスは、サイドエアバッグ２２の下部膨張室４５に第１ガス流路４７を経て矢印Ａの如く導かれるとともに、サイドエアバッグ２２の上部膨張室４６に矢印Ｂの如く導かれる。 Next, an example in which the side airbag 22 of the side airbag device 20 is deployed will be described with reference to FIGS.
6A and 6B are explanatory views showing a state in which the lower inflation chamber of the side airbag device according to the present invention is deployed.
In (a), gas is released from the inflator 21. The released gas is guided to the lower expansion chamber 45 of the side airbag 22 through the first gas flow path 47 as indicated by arrow A, and is also guided to the upper expansion chamber 46 of the side airbag 22 as indicated by arrow B.

ここで、下部膨張室４５は、上部膨張室４６と比較して容積が小さく抑えられた室部である。よって、上部膨張室４６と比較して下部膨張室４５を比較的少量のガスで展開させることができる。
これにより、下部膨張室４５は、上部膨張室４６と比較して迅速に展開を開始する。 Here, the lower expansion chamber 45 is a chamber whose volume is suppressed smaller than that of the upper expansion chamber 46. Therefore, the lower expansion chamber 45 can be developed with a relatively small amount of gas compared to the upper expansion chamber 46.
Thereby, the lower expansion chamber 45 starts to be deployed more quickly than the upper expansion chamber 46.

（ｂ）において、下部膨張室４５に第１ガス流路４７を経てガスが矢印Ａの如く継続して導かれるとともに、上部膨張室４６にガスが矢印Ｂの如く継続的に導かれる。
これにより、下部膨張室４５が十分に展開し、上部膨張室４６がある程度展開する。 In (b), the gas is continuously guided to the lower expansion chamber 45 through the first gas flow path 47 as indicated by arrow A, and the gas is continuously guided to the upper expansion chamber 46 as indicated by arrow B.
Thereby, the lower expansion chamber 45 is sufficiently expanded, and the upper expansion chamber 46 is expanded to some extent.

図７（ａ），（ｂ）は本発明に係るサイドエアバッグ装置のサイドエアバッグを展開した状態を示す説明図であり、図７（ｂ）は図７（ａ）の７ｂ−７ｂ線断面図である。
（ａ）において、上部膨張室４６が十分に展開することで、サイドエアバッグ２２は膨張展開を完了する。 7 (a) and 7 (b) are explanatory views showing a state in which the side airbag of the side airbag device according to the present invention is deployed, and FIG. 7 (b) is a cross-sectional view taken along line 7b-7b in FIG. 7 (a). FIG.
In (a), when the upper inflating chamber 46 is sufficiently deployed, the side airbag 22 is completely inflated and deployed.

（ｂ）において、結合布２８は、後端部２８ａにおいて、布幅Ｗ３が比較的大きい。よって、下部膨張室４５のうち、後側部位４５ａは、内側基布２５および外側基布２６間のバッグ幅Ｗ４が拡げられて大きくなる。
内側基布２５および外側基布２６間のバッグ幅Ｗ４は、後側部位４５ａの膨張幅である。
この後側部位４５ａは、腰部１２ａの右側部１２ｂに臨む。
よって、バッグ幅Ｗ４を拡げる後側部位４５ａで、腰部１２ａを好適に保護することができる。 In (b), the connecting cloth 28 has a relatively large cloth width W3 at the rear end 28a. Therefore, in the lower expansion chamber 45, the rear portion 45a is enlarged by increasing the bag width W4 between the inner base cloth 25 and the outer base cloth 26.
A bag width W4 between the inner base fabric 25 and the outer base fabric 26 is an expansion width of the rear portion 45a.
The rear portion 45a faces the right side portion 12b of the waist portion 12a.
Therefore, the waist part 12a can be suitably protected by the rear side part 45a which expands the bag width W4.

加えて、後側部位４５ａは、下部膨張室４５の一部であり、迅速に展開する。
よって、衝撃が発生した際に、発生した衝撃を腰部１２ａで良好に受けて、その後他の身体部を受けることができる。
これにより、乗員１２の身体部にかかる衝撃を、それぞれの身体部に合わせて調整することができるので、乗員１２を好適に保護することができる。 In addition, the rear portion 45a is a part of the lower expansion chamber 45, and rapidly expands.
Therefore, when an impact occurs, the generated impact can be satisfactorily received by the waist 12a, and then another body part can be received.
Thereby, since the impact concerning the body part of the passenger | crew 12 can be adjusted according to each body part, the passenger | crew 12 can be protected suitably.

なお、前記実施の形態では、サイドエアバッグ装置２０をシートバック１４の右側部１４ｂに設けた例について説明したが、これに限らないで、サイドエアバッグ装置２０を車体１１側に設けることも可能である。   In the above-described embodiment, the example in which the side airbag device 20 is provided on the right side 14b of the seat back 14 has been described. However, the present invention is not limited to this, and the side airbag device 20 may be provided on the vehicle body 11 side. It is.

また、前記実施の形態では、サイドエアバッグ装置２０を乗員１２の右側部に展開させた例について説明したが、これに限らないで、サイドエアバッグ装置２０を乗員１２の左側部に展開させるように構成しても同様の効果を得ることができる。   In the above embodiment, the example in which the side airbag device 20 is deployed on the right side of the occupant 12 has been described. However, the present invention is not limited to this, and the side airbag device 20 is deployed on the left side of the occupant 12. Even if configured, the same effect can be obtained.

さらに、前記実施の形態では、結合布２８として、内側結合部３５および外側結合部３６を縫い合わせたものを用いた例について説明したが、これに限らないで、一枚の基布で結合布２８を作ることも可能である。   Furthermore, in the above-described embodiment, the example in which the inner coupling portion 35 and the outer coupling portion 36 are stitched together has been described as the coupling fabric 28. However, the present invention is not limited to this, and the coupling fabric 28 is formed with a single base fabric. It is also possible to make.

また、前記実施の形態では、結合布２８として、シート後端部１０ａからシート前端部１０ｂに向けて、布幅Ｗ３が徐々に小さくなるように略台形状に形成されたものを例示したが、これに限定するものではない。
例えば、内外側の基布２５，２６において、シート後端部１０ａ側を比較的長いストラップで結合するとともに、シート前端部１０ｂ側を比較的短いストラップで結合することで、各基布２５，２６間のバッグ幅Ｗ４をシート前端部１０ｂ側で狭め、シート後端部１０ａ側で拡げるように形成することも可能である。 In the above embodiment, the binding cloth 28 is illustrated as having a substantially trapezoidal shape so that the cloth width W3 gradually decreases from the sheet rear end portion 10a toward the sheet front end portion 10b. However, the present invention is not limited to this.
For example, in the inner and outer base fabrics 25 and 26, the sheet rear end portion 10a side is coupled with a relatively long strap, and the sheet front end portion 10b side is coupled with a relatively short strap, whereby each base fabric 25 and 26 is coupled. The intermediate bag width W4 can be narrowed on the sheet front end portion 10b side and widened on the sheet rear end portion 10a side.

さらに、前記実施の形態では、バッグ幅Ｗ４を拡げる部位を後側部位４５ａとし、後側部位４５ａを腰部１２ａに臨ませた例について説明したが、これに限らないで、バッグ幅Ｗ４を拡げる部位をその他の部位に形成し、この部位を腰部１２ａ以外の身体に臨ませることも可能である。   Furthermore, in the above-described embodiment, the example in which the part that widens the bag width W4 is the rear part 45a and the rear part 45a faces the waist 12a has been described. However, the present invention is not limited to this, and the part that widens the bag width W4. It is also possible to form this in other parts and make this part face the body other than the waist 12a.

また、前記実施の形態では、膨張室として、サイドエアバッグ２２の下部２２ｂ近傍に下部膨張室４５を形成した例について説明したが、これに限らないで、サイドエアバッグ２２のその他の部位に形成することも可能である。   Moreover, in the said embodiment, although the example which formed the lower expansion chamber 45 in the lower part 22b vicinity of the side airbag 22 as an expansion chamber was demonstrated, it is not restricted to this, It forms in the other site | part of the side airbag 22. It is also possible to do.

本発明は、乗員側方のサイドエアバッグを、シートの後端部から前端部に向けて展開して乗員と車体との間に配置するサイドエアバッグ装置を備えた車両への適用に好適である。   INDUSTRIAL APPLICABILITY The present invention is suitable for application to a vehicle provided with a side airbag device that deploys a side airbag on the occupant side from the rear end portion of the seat toward the front end portion and arranges it between the occupant and the vehicle body. is there.

本発明に係るサイドエアバッグ装置を備えた車両用シートを示す斜視図である。It is a perspective view which shows the vehicle seat provided with the side airbag apparatus which concerns on this invention. 本発明に係るサイドエアバッグ装置を展開した状態を示す斜視図である。It is a perspective view which shows the state which expand | deployed the side airbag apparatus which concerns on this invention. 本発明に係るサイドエアバッグ装置を展開した状態を示す分解斜視図である。It is a disassembled perspective view which shows the state which expand | deployed the side airbag apparatus which concerns on this invention. 本発明に係るサイドエアバッグ装置の結合布を説明する図である。It is a figure explaining the binding fabric of the side airbag apparatus which concerns on this invention. 図５（ａ）は図２の５ａ−５ａ線断面図、図５（ｂ）は図２の５ｂ−５ｂ線断面図、および図５（ｃ）は図５（ａ）のサイドエアバッグが折り畳まれた状態を示す断面図である。5 (a) is a cross-sectional view taken along line 5a-5a in FIG. 2, FIG. 5 (b) is a cross-sectional view taken along line 5b-5b in FIG. 2, and FIG. 5 (c) is a side airbag folded in FIG. FIG. 本発明に係るサイドエアバッグ装置の下部膨張室を展開する状態を示す説明図である。It is explanatory drawing which shows the state which expand | deploys the lower expansion chamber of the side airbag apparatus which concerns on this invention. 本発明に係るサイドエアバッグ装置のサイドエアバッグを展開した状態を示す説明図である。It is explanatory drawing which shows the state which expand | deployed the side airbag of the side airbag apparatus which concerns on this invention.

符号の説明Explanation of symbols

１０…車両用シート（シート）、１０ａ…シート後端部（シートの後端部）、１０ｂ…シート前端部（シートの前端部）、１１…サイドドア（車体）、１２…乗員、１２ａ…乗員の腰部、２０…サイドエアバッグ装置、２２…サイドエアバッグ、２５…内側基布（内側壁部）、２６…外側基布（外側壁部）、２８…結合布（結合部）、４５…下部膨張室、４５ａ…後側部位（バッグ幅を拡げる部位）、４５ｂ…前側部位（バッグ幅を狭める部位）、Ｗ３…布幅、Ｗ４…バッグ幅。   DESCRIPTION OF SYMBOLS 10 ... Vehicle seat (seat), 10a ... Seat rear end part (seat rear end part), 10b ... Seat front end part (front end part of seat), 11 ... Side door (vehicle body), 12 ... Passenger, 12a ... Passenger 20 ... side airbag device, 22 ... side airbag, 25 ... inner base fabric (inner wall portion), 26 ... outer base fabric (outer wall portion), 28 ... joint fabric (joint portion), 45 ... lower part Expansion chamber, 45a ... rear part (part that widens the bag width), 45b ... front part (part that narrows the bag width), W3 ... cloth width, W4 ... bag width.

Claims (3)

シートに着座した乗員の側方にサイドエアバッグを設け、このサイドエアバッグをシートの後端部側から前端部側に向けて展開することで乗員と車体との間に配置し、配置したサイドエアバッグの内側壁部を乗員に臨ませるとともに外側壁部を車体に臨ませるサイドエアバッグ装置において、
前記内側壁部および前記外側壁部の間に介在され、各壁部を間隔をおいて結合することで、各壁部間のバッグ幅を、前記シートの前端部側で狭めるとともに前記シートの後端部側で拡げるように設定可能な結合部を備えたことを特徴とするサイドエアバッグ装置。 A side airbag is provided on the side of the occupant seated in the seat, and the side airbag is deployed between the occupant and the vehicle body by deploying the side airbag from the rear end side to the front end side of the seat. In the side airbag device in which the inner wall portion of the airbag faces the occupant and the outer wall portion faces the vehicle body,
It is interposed between the inner wall portion and the outer wall portion, and each wall portion is joined with a space therebetween, thereby narrowing the bag width between the wall portions on the front end side of the seat and the rear of the seat. A side airbag device comprising a coupling portion that can be set so as to expand on an end side. 前記結合部は、布製の部材で、前記シートの後端部側から前端部側に向けて、布幅が徐々に小さくなるように略台形状に形成されたことを特徴とする請求項１記載のサイドエアバッグ装置。   The said coupling | bond part is a member made from cloth, and was formed in the substantially trapezoid shape so that the cloth width may become small gradually toward the front end part side from the rear end part side of the said sheet | seat. Side airbag device. 前記サイドエアバッグは、前記バッグ幅を拡げる部位が、前記乗員の腰部に臨むように形成されたことを特徴とする請求項１または２記載のサイドエアバッグ装置。
The side airbag device according to claim 1 or 2, wherein the side airbag is formed so that a portion that expands the width of the bag faces a waist portion of the occupant.
JP2006006725A 2006-01-13 2006-01-13 Side airbag device Expired - Fee Related JP5216191B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010126017A (en) * 2008-11-28 2010-06-10 Toyoda Gosei Co Ltd Side airbag device
JP2012056506A (en) * 2010-09-10 2012-03-22 Toyota Motor Corp Side airbag device
US8181989B2 (en) 2009-06-05 2012-05-22 Toyoda Gosei Co., Ltd. Side airbag apparatus
JP2015217719A (en) * 2014-05-14 2015-12-07 本田技研工業株式会社 Knee airbag device for vehicle
JP2016107887A (en) * 2014-12-08 2016-06-20 トヨタ自動車株式会社 Side airbag device for vehicle

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JP2003501303A (en) * 1999-02-05 2003-01-14 ブリード・オートモティブ・テクノロジィ・インク Side airbag device
JP2003291761A (en) * 2002-04-01 2003-10-15 Toyoda Gosei Co Ltd Airbag device
JP2005053465A (en) * 2003-03-27 2005-03-03 Toyoda Gosei Co Ltd Side air bag device
JP2005313688A (en) * 2004-04-27 2005-11-10 Nippon Plast Co Ltd Air bag

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JPH1035399A (en) * 1996-04-24 1998-02-10 Petri Ag Gas bag
JP2003501303A (en) * 1999-02-05 2003-01-14 ブリード・オートモティブ・テクノロジィ・インク Side airbag device
JP2003291761A (en) * 2002-04-01 2003-10-15 Toyoda Gosei Co Ltd Airbag device
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010126017A (en) * 2008-11-28 2010-06-10 Toyoda Gosei Co Ltd Side airbag device
US8353528B2 (en) 2008-11-28 2013-01-15 Toyoda Gosei Co., Ltd. Side airbag apparatus
US8181989B2 (en) 2009-06-05 2012-05-22 Toyoda Gosei Co., Ltd. Side airbag apparatus
JP2012056506A (en) * 2010-09-10 2012-03-22 Toyota Motor Corp Side airbag device
JP2015217719A (en) * 2014-05-14 2015-12-07 本田技研工業株式会社 Knee airbag device for vehicle
JP2016107887A (en) * 2014-12-08 2016-06-20 トヨタ自動車株式会社 Side airbag device for vehicle

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