JP2008132811A

JP2008132811A - Head part protection air bag

Info

Publication number: JP2008132811A
Application number: JP2006318578A
Authority: JP
Inventors: Masao Kino; 雅夫木野; Sunao Yamamoto; 直山本; Mikine Hayashi; 幹根林; Takashi Sasaki; 崇至佐々木; Hiroshi Masuda; 泰士増田; Hitoshi Kawabe; 仁志川辺; Yukisachi Tanaka; 志幸田中; Kikuyo Yokoi; 希久代横井
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2006-11-27
Filing date: 2006-11-27
Publication date: 2008-06-12

Abstract

PROBLEM TO BE SOLVED: To provide a head part protection air bag capable of suppressing waste of materials in use, and quickly lowering internal pressure, even if internal pressure of vertical inflation parts receiving a head part of an occupant suddenly rises. SOLUTION: This air bag 20 is deployed from an upper side of a side window of a vehicle folded and stored with the air bag 20, while being inflated by gas for inflation flowing between a vehicle inside wall part 21a and a vehicle outside wall part 21b, and a protection inflation part 24 is arranged on a side of the head part of the occupant. The protection inflation part 24 is divided by a division part 42 extending in the vertical direction and is provided with the plurality of vertical inflation parts 25a provided with gas inflow ports 25b in upper parts. A closing part 43 for communication opened to communicate with the adjacent vertical inflation parts 29 and 30 when the internal pressure rises is disposed on the side of a lower part 42a where the vertical inflation part 28 as a predetermined constraint part 27 to receive the head part of the occupant becomes a vicinity portion on the side of a lower edge 20b of the air bag 20 in the adjacent division part 42. COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、車両のサイドウインドの上縁側から、膨張用ガスを流入させて下方に展開膨張し、乗員の頭部を保護可能な頭部保護エアバッグに関する。 The present invention relates to a head protection airbag capable of protecting an occupant's head by infusing an inflating gas from an upper edge side of a side window of a vehicle.

従来、頭部保護エアバッグでは、車内側壁部と車外側壁部との間に流入する膨張用ガスによって膨張しつつ、折り畳まれて収納された車両のサイドウインドの上方側から展開して、乗員頭部の側方に保護膨張部を配置させる構成としていた。また、膨張完了時のエアバッグが、前後方向にテンションを発生させて、乗員を車内側に受け止めておく拘束性能を維持できるように、保護膨張部は、車内側壁部と車外側壁部とを結合させて上下方向に延びる区画部により区画されて、前後方向に沿って並設される複数の縦膨張部を備えて構成されていた。 Conventionally, in a head protection airbag, the airbag is expanded from the upper side of a side window of a vehicle that is folded and stored while being inflated by an inflating gas flowing between the inner wall portion and the outer wall portion of the vehicle. It was set as the structure which arrange | positions a protection expansion part to the side of a head. In addition, the protective inflatable part has a vehicle inner wall part and a car outer wall part so that the airbag at the time of completion of inflation can maintain a restraining performance that generates tension in the front-rear direction and holds the occupant inside the vehicle. A plurality of vertically inflating portions are provided that are partitioned by partition portions that extend in the up-down direction and are arranged in parallel in the front-rear direction.

そして、従来の頭部保護エアバッグでは、膨張完了時に乗員を受け止めて内圧を急激に上昇させた際に、ガス漏れしないように、エアバッグの下縁側に、膨張用ガスを流入させて内圧上昇を抑制する調圧部を配設させていた（例えば、特許文献１）。
特開２００５−９６５７５号公報 And in the conventional head protection airbag, when the occupant is received when the inflation is completed and the internal pressure is suddenly raised, the inflation pressure is introduced into the lower edge of the airbag to prevent the gas from leaking. The pressure regulation part which suppresses was arrange | positioned (for example, patent document 1).
JP 2005-96575 A

しかし、従来の頭部保護エアバッグでは、下縁まで展開した後における縦膨張部が、厚さを増加させるように膨張用ガスの流入途中において、エアバッグに接近している近接乗員の頭部を受け止める際、その接触している縦膨張部だけが、局部的にかつ急激に内圧を上昇させる場合があり、その場合には、エアバッグの下縁側に配置されている調圧部に膨張用ガスが流入する状態となっていても、その調圧部より膨張用ガスの上流側となっている縦膨張部が、内圧上昇を抑制し難く、局部的かつ急激に内圧を上昇させた縦膨張部を、迅速に、内圧を低下させる点に、改善の余地があった。 However, in the conventional head protection airbag, the head part of the occupant who is approaching the airbag is in the middle of the inflow of the inflation gas so that the vertical inflation part after deployment to the lower edge increases the thickness. When receiving the pressure, only the vertically inflated part that is in contact with it may increase the internal pressure locally and suddenly. In that case, the pressure adjusting part arranged on the lower edge side of the airbag is used for inflation. Even if the gas flows in, the longitudinal expansion part that is upstream of the expansion gas from the pressure adjusting part is difficult to suppress the increase in internal pressure, and the vertical expansion that locally and suddenly increases the internal pressure. There was room for improvement in that the internal pressure was lowered quickly.

また、従来の頭部保護エアバッグでは、エアバッグの下縁側に、調圧部の部位を配設させており、そのエリア分は、急激に内圧を上昇させない状態で、エアバッグが乗員を受け止める場合には、無駄となってしまう。 Further, in the conventional head protection airbag, the pressure adjusting portion is disposed on the lower edge side of the airbag, and the airbag receives the occupant in a state where the internal pressure does not increase rapidly for the area. In some cases, it will be useless.

本発明は、上述の課題を解決するものであり、使用材料の無駄を抑えて、乗員頭部を受け止めた縦膨張部が、局部的かつ急激に内圧を上昇させても、迅速に、内圧を低下させることができる頭部保護エアバッグを提供することを目的とする。 The present invention solves the above-mentioned problems, and suppresses the waste of the material used, and even if the longitudinally expanding portion receiving the head of the occupant raises the internal pressure locally and rapidly, the internal pressure is quickly increased. An object of the present invention is to provide a head protection airbag that can be lowered.

本発明に係る頭部保護エアバッグは、車内側壁部と車外側壁部との間に流入する膨張用ガスによって膨張しつつ、折り畳まれて収納された車両のサイドウインドの上方側から展開して、乗員頭部の側方に保護膨張部を配置させ、
保護膨張部が、車内側壁部と車外側壁部とを結合させて上下方向に延びる区画部により区画されて、前後方向に沿って並設される複数の縦膨張部を備えて構成され、
複数の縦膨張部が、それぞれ、上部に膨張用ガスを流入させるガス流入口を配設させて構成される頭部保護エアバッグであって、
複数の縦膨張部の内の一つが、乗員頭部を受け止める拘束予定部として配設され、
拘束予定部の縦膨張部に隣接する少なくとも一つの区画部が、
車内側壁部と車外側壁部とを結合させてエアバッグの外周縁を形成する周縁部におけるエアバッグの下縁側の部位まで、下方に延びるように配設されるとともに、エアバッグの下縁側の近傍部位となる下部側に、拘束予定部の縦膨張部が区画部を間にして隣接する縦膨張部より内圧を上昇させた際に、隣接する縦膨張部相互を連通させるように開口する連通用閉塞部を配設させて、構成されていることを特徴とする。 The head protection airbag according to the present invention is expanded from the upper side of the side window of the vehicle that is folded and stored while being inflated by an inflating gas flowing between the inner wall portion and the outer wall portion of the vehicle. , Place the protective inflatable part on the side of the passenger head,
The protective inflating portion is composed of a plurality of vertically inflating portions that are partitioned by a partition portion that extends in the up-down direction by combining the vehicle inner wall portion and the vehicle outer wall portion, and is arranged in parallel along the front-rear direction.
Each of the plurality of longitudinally inflatable portions is a head protection airbag configured by disposing a gas inflow port through which inflation gas flows into the upper portion,
One of the plurality of vertically inflatable portions is disposed as a restraint scheduled portion that receives the occupant head,
At least one section adjacent to the longitudinal expansion portion of the planned restraining portion,
The vehicle inner wall portion and the vehicle outer wall portion are connected to each other so as to extend downward to the lower edge side portion of the airbag at the peripheral edge portion forming the outer peripheral edge of the airbag. When the longitudinal expansion portion of the constrained planned portion has an internal pressure higher than that of the adjacent vertical expansion portion with the partitioning portion interposed therebetween, a continuous opening is formed so that the adjacent vertical expansion portions communicate with each other. It is characterized in that it is configured by disposing a common blocking portion.

本発明に係る頭部保護エアバッグでは、サイドウインドの上方側から展開して、乗員頭部の側方に保護膨張部を配置させるように展開させて、厚さを増すように膨らむ際、乗員頭部が、拘束予定部の縦膨張部に対して干渉し（当たり）、拘束予定部の縦膨張部が内圧を局部的にかつ急激に上昇させても、連通用閉塞部が開口して、連通用閉塞部を間にして隣接する縦膨張部側に膨張用ガスを逃がすことができる。さらに、連通用閉塞部は、車内側壁部と車外側壁部とを結合させて上下方向に延びる区画部の下部側に配置されているものであり、開口すれば、車内側壁部と車外側壁部とを車内外方向で離す状態となって、保護膨張部の容積を増大させる態様となる。すなわち、連通用閉塞部を開口させて、乗員頭部と干渉していた拘束予定部の縦膨張部から膨張用ガスを逃がすことができるとともに、その縦膨張部の容積が増大することから、乗員頭部と干渉していた拘束予定部の縦膨張部の内圧を、迅速に低下させることができ、乗員頭部に対する押圧力を低減できる。 When the head protection airbag according to the present invention is deployed from the upper side of the side window and is deployed so as to dispose the protective inflating portion on the side of the occupant head, the occupant is inflated to increase the thickness. Even if the head interferes with the longitudinal expansion portion of the planned restraining portion (hit) and the vertical expansion portion of the planned restraining portion increases the internal pressure locally and rapidly, the communication blocking portion opens, The expansion gas can escape to the adjacent vertical expansion portion side with the communication blocking portion in between. Further, the communication blocking portion is disposed on the lower side of the partition portion extending in the vertical direction by connecting the vehicle inner wall portion and the vehicle outer wall portion, and if opened, the vehicle inner wall portion and the vehicle outer wall are provided. It will be in the state where it will be in the state where it is separated from the part in the inside and outside of the vehicle, and the volume of the protection expansion part will be increased. That is, by opening the communication blocking portion, it is possible to escape the inflation gas from the longitudinal expansion portion of the constrained planned portion that has interfered with the occupant head, and the volume of the vertical expansion portion increases. The internal pressure of the longitudinally expanded portion of the constrained scheduled portion that has interfered with the head can be quickly reduced, and the pressing force on the passenger's head can be reduced.

また、このような内圧を低下させる部位が、縦膨張部を区画する区画部から構成されており、エアバッグの使用材料の無駄を、極力、無くすことができる。 Moreover, the site | part which reduces such an internal pressure is comprised from the division part which divides a vertical expansion part, and the waste of the material used for an airbag can be eliminated as much as possible.

そして、連通用閉塞部は、急激な内圧上昇が無ければ、開口しないことから、上部のガス流入口から流入する膨張用ガスにより、連通用閉塞部を間にして隣接する縦膨張部相互の膨張完了を促進させることができて、乗員頭部の拘束予定部の縦膨張部における初期拘束時に、十分な内圧を容易に確保できる。 Since the communication blocking portion does not open unless there is a sudden increase in internal pressure, the expansion gas flowing in from the upper gas inflow port causes expansion between adjacent vertical expansion portions with the communication blocking portion in between. Completion can be promoted, and a sufficient internal pressure can be easily secured at the time of initial restraint in the longitudinal expansion portion of the restraint scheduled portion of the passenger head.

勿論、エアバッグは、拘束予定部の縦膨張部が内圧を局部的にかつ急激に上昇させても、連通用閉塞部が開口すれば、連通用閉塞部を間にして隣接する縦膨張部側に膨張用ガスを逃がすことができ、容積増大による内圧の上昇の抑制とともに、エアバッグの全体で内圧上昇を吸収することができて、エアバッグの破損を招くことなく、エアバッグのガス漏れを防止できる。 Of course, even if the longitudinal expansion part of the planned restraining part increases the internal pressure locally and rapidly, if the communication blocking part opens, the airbag will be adjacent to the side of the vertical expansion part. The expansion gas can be allowed to escape, the increase in the internal pressure due to the increase in volume can be suppressed, and the increase in the internal pressure can be absorbed by the entire airbag, preventing the airbag from leaking without causing damage to the airbag. Can be prevented.

したがって、本発明に係る頭部保護エアバッグでは、使用材料の無駄を抑えて、乗員頭部を受け止める拘束予定部としての縦膨張部が、局部的かつ急激に内圧を上昇させても、迅速に、内圧を低下させることができる。 Therefore, in the head protection airbag according to the present invention, the use of the material used is suppressed, and the longitudinal expansion portion as the restraint scheduled portion that catches the occupant's head can quickly and locally increase the internal pressure. The internal pressure can be reduced.

そして、エアバッグの周縁部には、エアバッグの内圧上昇時に、エアバッグ外に膨張用ガスを排気可能に開口する排気用閉塞部を配設することが望ましい。このような構成では、連通用閉塞部が開口して、容積増大による内圧の上昇の抑制とともに、エアバッグの全体で内圧上昇を吸収する際、その内圧が、著しく上昇することとなっても、排気用閉塞部が開口して、エアバッグ外へ膨張用ガスを排気できる。そのため、縦膨張部の急激な内圧上昇をエアバッグ全体で吸収し切れなかった場合でも、エアバッグの破損を防止できて、縦膨張部は、乗員頭部を保護できる内圧を確保できる。 And it is desirable to arrange | position the obstruction | occlusion part for exhaust_gas | exhaustion which opens the gas for expansion | swelling out of an airbag so that exhaust gas can be exhausted at the peripheral part of an airbag at the time of the internal pressure rise of an airbag. In such a configuration, when the communication blocking portion is opened, the increase in the internal pressure due to the increase in volume and the absorption of the increase in the internal pressure in the entire airbag are absorbed, the internal pressure is significantly increased. The exhaust blocking portion is opened, and the inflation gas can be exhausted out of the airbag. Therefore, even when the sudden increase in internal pressure of the longitudinal inflating portion cannot be absorbed by the entire airbag, the airbag can be prevented from being damaged, and the longitudinal inflating portion can secure an internal pressure that can protect the occupant's head.

また、本発明に係る頭部保護エアバッグでは、拘束予定部の縦膨張部の前後に、連通用閉塞部を備えた区画部によって区画させて、縦膨張部を配設させ、
排気用閉塞部を、拘束予定部の縦膨張部と拘束予定部の縦膨張部に前後で隣接する縦膨張部の内、少なくとも拘束予定部の縦膨張部の下方に、配設させてもよい。 Further, in the head protection airbag according to the present invention, before and after the longitudinal inflating portion of the planned restraining portion, it is partitioned by a partition portion having a communication blocking portion, and the longitudinal inflating portion is disposed.
The exhaust blocking portion may be disposed at least below the longitudinal expansion portion of the planned restraining portion among the longitudinal expansion portion of the planned restraining portion and the longitudinal expansion portion adjacent to the longitudinal expansion portion of the planned restraining portion in the front-rear direction. .

このような構成では、拘束予定部の縦膨張部の急激な内圧上昇時、隣接する二つの連通用閉塞部を開口させることができ、二つの連通用閉塞部を開口させれば、一層迅速に、拘束予定部の縦膨張部の内圧を低減でき、さらに、その内圧抑制が十分でない場合でも、直下の排気用閉塞部を開口させて、拘束予定部の縦膨張部内の膨張用ガスを極めて迅速にエアバッグ外に排気できる。そのため、拘束予定部の縦膨張部が、著しく急激に内圧を上昇させても、破損することなく、かつ、反力を抑えて、乗員頭部を受け止めることが可能となる。 In such a configuration, when the internal pressure of the vertical expansion portion of the planned restraining portion is suddenly increased, the two adjacent communication blocking portions can be opened, and if the two communication blocking portions are opened, it is more quickly performed. In addition, the internal pressure of the vertical expansion portion of the planned restriction portion can be reduced, and even if the internal pressure is not sufficiently suppressed, the exhaust gas closing opening is opened immediately below, and the expansion gas in the vertical expansion portion of the planned restriction portion is very quickly opened. The air can be exhausted outside the airbag. Therefore, even if the longitudinal expansion portion of the planned restraining portion increases the internal pressure remarkably rapidly, it becomes possible to receive the occupant's head without being damaged and suppressing the reaction force.

なお、エアバッグが、袋織りにより形成される場合、連通用閉塞部や排気用閉塞部は、袋織りに使用する糸を破断可能に車内側壁部と車外側壁部との一方から他方に延びるように配設した接結部により、構成してもよい。この場合には、エアバッグの袋織り時に、連通用閉塞部や排気用閉塞部を容易に形成できる。 When the airbag is formed by bag weaving, the communication blocking portion and the exhaust blocking portion extend from one of the vehicle inner wall portion and the vehicle outer wall portion to the other so that the yarn used for bag weaving can be broken. You may comprise by the connection part arrange | positioned in this way. In this case, the communication blocking portion and the exhaust blocking portion can be easily formed when weaving the airbag.

勿論、この点を考慮しなければ、連通用閉塞部や排気用閉塞部は、破断可能な縫合糸を使用した車内側壁部と車外側壁部との縫合、若しくは、剥離可能な接着剤を使用した車内側壁部と車外側壁部との接着、の少なくとも一方を使用した結合構造として、構成してもよい。このような構成は、車内側壁部や車外側壁部とを縫合や接着等により結合させてエアバッグを形成する結合タイプのエアバッグに適用すれば、エアバッグの製造時に同時に連通用閉塞部や排気用閉塞部を容易に形成できることから、好適となる。 Of course, if this point is not taken into consideration, the communication blocking part and the exhaust blocking part use a sewable or separable adhesive between the vehicle inner wall and the vehicle outer wall using a breakable suture. You may comprise as a connection structure using at least one of the adhesion | attachment of the vehicle inner side wall part and vehicle outer side wall part. If such a configuration is applied to a coupling type airbag that forms an airbag by bonding the inner wall portion and the outer wall portion of the vehicle by stitching or adhesion, the communication blocking portion or This is preferable because the exhaust blocking portion can be easily formed.

また、連通用閉塞部は、エアバッグの下縁側からくるんで結束するとともに、連通用閉塞部の開口時に破断する結束材から構成してもよい。このような構成では、エアバッグの製造後に結束材を組み付ける構成であって、結束材の選択によって、連通用閉塞部の開口する縦膨張部の内圧値を、容易に変更することができる。 Further, the communication blocking portion may be formed of a binding material that wraps and binds from the lower edge side of the airbag and breaks when the communication blocking portion is opened. In such a configuration, the binding material is assembled after the airbag is manufactured, and the internal pressure value of the longitudinal inflating portion opened by the communication blocking portion can be easily changed by selecting the binding material.

以下、本発明の一実施形態を図面に基づいて説明すると、図１，２に示すように、第１実施形態の頭部保護エアバッグ（以下、特に断らない限り、単にエアバッグとする）２０は、車両Ｖに搭載される頭部保護用のエアバッグ装置Ｍに使用されるものである。このエアバッグ装置Ｍは、エアバッグ２０と、インフレーター１２と、取付ブラケット１０，１３と、エアバッグカバー８と、を備えて構成されている。そして、エアバッグ２０は、車両Ｖの車内側におけるサイドウインドＷ１，Ｗ２の上縁側において、フロントピラー部ＦＰの下縁側から、ルーフサイドレール部ＲＲの下縁側を経て、リヤピラー部ＲＰの上方側までの範囲に、折り畳まれて収納されている。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a head protecting airbag 20 according to a first embodiment (hereinafter simply referred to as an airbag unless otherwise specified). Is used in the airbag device M for protecting the head mounted on the vehicle V. The airbag device M includes an airbag 20, an inflator 12, mounting brackets 10 and 13, and an airbag cover 8. The airbag 20 extends from the lower edge side of the front pillar portion FP to the upper side of the rear pillar portion RP from the lower edge side of the front pillar portion FP on the upper edge side of the side windows W1 and W2 on the inner side of the vehicle V. It is folded and stored in the range.

インフレーター１２は、図１，２に示すように、略円柱状のシリンダタイプとして、エアバッグ２０における膨張用ガスを流入させるための接続口部２２が、外装され、クランプ１５を利用して、エアバッグ２０と連結されている。そして、インフレーター１２は、取付ブラケット１３を利用して、センターピラー部ＣＰの上方付近におけるルーフサイドレール部ＲＲのインナパネル２に、ルーフヘッドライニング５の下縁５ａに覆われて、取付固定されている。なお、インナパネル２は、車両Ｖのボディ（車体）１側の部材である。また、取付ブラケット１３は、板金製として、インフレーター１２を保持し、取付ボルト１４を利用して、インナパネル２に固定されている。 As shown in FIGS. 1 and 2, the inflator 12 is a substantially cylindrical cylinder type and is provided with a connection port portion 22 for allowing the inflation gas in the airbag 20 to flow in. The bag 20 is connected. The inflator 12 is attached and fixed to the inner panel 2 of the roof side rail portion RR near the upper portion of the center pillar portion CP by being covered with the lower edge 5a of the roof head lining 5 using the mounting bracket 13. Yes. The inner panel 2 is a member on the body (vehicle body) 1 side of the vehicle V. The mounting bracket 13 is made of sheet metal, holds the inflator 12, and is fixed to the inner panel 2 using the mounting bolts 14.

各取付ブラケット１０は、二枚の板金製のプレートから構成され、エアバッグ２０の各取付部４０を挟むように、各取付部４０に取り付けられ（図７参照）、取付ボルト１１によって、各取付部４０をインナパネル２に取付固定している。なお、各取付ボルト１１は、ナット２ｂを設けてインナパネル２に形成された取付孔２ａに、締結されている。 Each mounting bracket 10 is composed of two sheet metal plates, and is mounted on each mounting portion 40 so as to sandwich each mounting portion 40 of the airbag 20 (see FIG. 7). The portion 40 is fixedly attached to the inner panel 2. Each mounting bolt 11 is fastened to a mounting hole 2a formed in the inner panel 2 by providing a nut 2b.

エアバッグカバー８は、フロントピラー部ＦＰに配置されるフロントピラーガーニッシュ４とルーフサイドレール部ＲＲに配置されるルーフヘッドライニング５とのそれぞれの下縁４ａ，５ａ側から構成されている。なお、フロントピラーガーニッシュ４とルーフヘッドライニング５とは、合成樹脂製とし、フロントピラー部ＦＰとルーフサイドレール部ＲＲとにおいて、それぞれ、ボディ１のインナパネル２における車内側に、取付固定されている。また、ルーフヘッドライニング５は、フロントピラー部ＦＰの上方付近から、センターピラー部ＣＰの上方を経て、リヤピラー部ＲＰの上方付近まで、配設されている。 The airbag cover 8 is configured from the lower edges 4a and 5a of the front pillar garnish 4 disposed in the front pillar portion FP and the roof head lining 5 disposed in the roof side rail portion RR. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin, and are fixedly attached to the inner side of the inner panel 2 of the body 1 at the front pillar portion FP and the roof side rail portion RR, respectively. . Further, the roof head lining 5 is disposed from the vicinity above the front pillar portion FP to the vicinity above the rear pillar portion RP via the center pillar portion CP.

エアバッグ２０は、図１〜５に示すように、ポリアミド糸等を使用した袋織りにより製造されている。このエアバッグ２０は、インフレーター１２からの膨張用ガスＧを流入させて、折り畳み状態から展開して、サイドウインドＷ１，Ｗ２やセンターピラー部ＣＰ、リヤピラー部ＲＰのセンターピラーガーニッシュ７，リヤピラーガーニッシュ６の車内側を覆うように、展開膨張する。そして、エアバッグ２０は、膨張用ガスＧを流入させて車内側壁部２１ａと車外側壁部２１ｂとを離すように膨らむガス流入部２１と、膨張用ガスＧを流入させない非流入部３５と、を備えて構成されている。 As shown in FIGS. 1 to 5, the airbag 20 is manufactured by bag weaving using polyamide yarn or the like. The airbag 20 is supplied with the inflation gas G from the inflator 12 and deployed from the folded state. It expands and expands to cover the inside of the car. The airbag 20 includes a gas inflow portion 21 that inflates the inflating gas G so as to separate the vehicle inner side wall portion 21a and the vehicle outer side wall portion 21b, a non-inflow portion 35 that does not allow the inflation gas G to flow in, It is configured with.

非流入部３５は、ガス流入部２１の車内側壁部２１ａと車外側壁部２１ｂとを相互に結合させたように形成され、周縁部３６、取付部４０、区画部４１，４２、及び、板状部４６，４７、から構成されている。周縁部３６は、エアバッグ２０の外周縁の部位に配置されて、ガス流入部２１の周囲を囲むように、形成されている。 The non-inflow portion 35 is formed such that the vehicle inner side wall portion 21a and the vehicle outer side wall portion 21b of the gas inflow portion 21 are coupled to each other, and the peripheral edge portion 36, the attachment portion 40, the partition portions 41 and 42, and the plate It is comprised from the shape parts 46 and 47. FIG. The peripheral edge portion 36 is disposed at the outer peripheral edge portion of the airbag 20 and is formed so as to surround the gas inflow portion 21.

取付部４０は、エアバッグ２０の上縁２０ａ側における周縁部３６から上方へ突出するように、複数（実施形態では６個）配置されて、インナパネル２に取り付けるための取付ブラケット１０が固着されることとなる（図７参照）。各取付部４０には、取付ボルト１１を挿通させる取付孔４０ａが、開口されている。 A plurality of mounting portions 40 (six in the embodiment) are arranged so as to protrude upward from the peripheral edge portion 36 on the upper edge 20a side of the airbag 20, and the mounting bracket 10 for mounting to the inner panel 2 is fixed. (See FIG. 7). Each attachment portion 40 has an attachment hole 40a through which the attachment bolt 11 is inserted.

板状部４６は、長方形板状として、前後の前席用保護部２５と後席用保護部２６との間におけるガス供給路部２３の下方に配設されている。板状部４７は、三角板状として、エアバッグ２０の前縁側に縫合されて配設されている。これらの板状部４６，４７は、エアバッグ２０の全体形状を確保するとともに、ガス流入部２１の容積を小さくして、膨張完了までの時間を短くするために、配設されている。 The plate-like portion 46 has a rectangular plate shape and is disposed below the gas supply path portion 23 between the front and rear front seat protection portions 25 and the rear seat protection portion 26. The plate-like portion 47 has a triangular plate shape and is sewn to the front edge side of the airbag 20. These plate-like portions 46 and 47 are disposed in order to secure the overall shape of the airbag 20 and reduce the volume of the gas inflow portion 21 to shorten the time until the completion of inflation.

区画部４１は、板状部４６からガス供給路部２３に沿って後方へ延びて、後席用保護部２６内に侵入するように、下方に延びる逆Ｌ字形状に配設されている。区画部４２は、前席用保護部２５の領域内で、上下方向に沿うように配設されて、前後に二つ並設されている。これらの区画部４１，４２は、膨張完了時のエアバッグ２０の厚さを規制し、エアバッグ２０を板状に膨張させることができるように、厚さ規制部として、配設されるとともに、保護膨張部２４を上下方向に延びる複数（実施形態では五個）の縦セル２４ａに区画するように形成し、膨張時に、エアバッグ２０の前後方向の長さを短くして、膨張完了時のエアバッグ２０の下縁２０ｂ側に、前後方向のテンションを生じさせるために、配設されている。 The partition portion 41 is disposed in an inverted L shape extending downward from the plate-like portion 46 along the gas supply passage portion 23 and extending downward so as to enter the rear seat protection portion 26. In the area of the front seat protection section 25, the partition section 42 is disposed along the vertical direction, and two partition sections 42 are arranged side by side. These partition portions 41 and 42 are disposed as thickness restricting portions so that the thickness of the airbag 20 at the completion of the inflation is regulated and the airbag 20 can be inflated into a plate shape. The protective inflatable portion 24 is formed so as to be partitioned into a plurality of (in the embodiment, five) vertical cells 24a extending in the vertical direction, and when inflated, the length of the airbag 20 in the front-rear direction is shortened, The air bag 20 is disposed on the lower edge 20b side in order to generate a tension in the front-rear direction.

そして、前席用保護部２５の区画部４２は、周縁部３６におけるエアバッグ２０の下縁２０ｂ側の部位まで、下方に延びるように配設されている。 The partition portion 42 of the front seat protecting portion 25 is disposed so as to extend downward to a portion of the peripheral edge portion 36 on the lower edge 20b side of the airbag 20.

ガス流入部２１は、実施形態の場合、接続口部２２、ガス供給路部２３、及び、保護膨張部２４、から構成されている。ガス供給路部２３は、保護膨張部２４より膨張用ガスＧの上流側部位であって、エアバッグ２０の上縁２０ａ側で車両Ｖの前後方向に沿って、直線状に配設されている。ガス供給路部２３の前後方向の略中間部位には、上方へ延びて、インフレーター１２からの膨張用ガスＧをガス流入部２１内に流入させるための接続口部２２が、形成されている。ガス供給路部２３では、接続口部２２から膨張用ガスＧが流入すると、膨張用ガスＧは、車両Ｖの前後方向両側に向かうように、流れることとなる。 In the embodiment, the gas inflow portion 21 includes a connection port portion 22, a gas supply path portion 23, and a protective expansion portion 24. The gas supply path portion 23 is an upstream portion of the inflation gas G from the protective inflation portion 24, and is arranged linearly along the front-rear direction of the vehicle V on the upper edge 20 a side of the airbag 20. . A connection port portion 22 that extends upward and allows the inflation gas G from the inflator 12 to flow into the gas inflow portion 21 is formed at a substantially intermediate portion in the front-rear direction of the gas supply passage portion 23. In the gas supply path portion 23, when the expansion gas G flows from the connection port portion 22, the expansion gas G flows toward the both sides in the front-rear direction of the vehicle V.

保護膨張部２４は、車両Ｖのシートに着座した乗員の頭部を保護するエリアであり、前席用保護部２５と後席用保護部２６とを備えて構成されている。前席用保護部２５は、ガス供給路部２３の前部側の下方に配置され、エアバッグ２０の展開膨張時、車両Ｖの前席の側方に配置されて、前席側方のサイドウインドＷ１を覆うように膨張することとなる。後席用保護部２６は、ガス供給路部２３の後部側の下方に配置され、エアバッグ２０の展開膨張時、車両Ｖの後席の側方に配置されて、後席側方のサイドウインドＷ２を覆うこととなる。そして、保護膨張部２４は、厚さを規制する区画部４１，４２によって区画され、上下方向に棒状に延びるように膨張して、車両Ｖの前後方向に並設される複数の縦セル２４ａを備えて構成され、前席用保護部２５は、三つの縦セル２４ａを備えて構成され、後席用保護部２６は、二つの縦セル２４ａを備えて構成されている。さらに、前席用保護部２５の三つの縦セル２４ａが、それぞれ、上部に、ガス供給路部２３に連通させて、膨張用ガスＧを流入させるガス流入口２５ｂを配設させた縦膨張部２５ａ、を構成している。 The protective inflating part 24 is an area for protecting the head of an occupant seated on the seat of the vehicle V, and includes a front seat protecting part 25 and a rear seat protecting part 26. The front seat protection unit 25 is disposed below the front side of the gas supply passage 23, and is disposed on the side of the front seat of the vehicle V when the airbag 20 is deployed and inflated. It will expand to cover the window W1. The rear seat protection unit 26 is disposed below the rear side of the gas supply passage 23, and is disposed on the side of the rear seat of the vehicle V when the airbag 20 is deployed and inflated. W2 will be covered. And the protection expansion part 24 is divided by the division parts 41 and 42 which regulate thickness, expand | swells so that it may extend in a rod shape to an up-down direction, and several vertical cell 24a arranged in parallel by the front-back direction of the vehicle V is included. The front seat protection unit 25 includes three vertical cells 24a, and the rear seat protection unit 26 includes two vertical cells 24a. Further, the three vertical cells 24a of the front seat protection unit 25 are respectively connected to the gas supply path 23 at the upper part thereof, and the vertical expansion parts in which the gas inlets 25b through which the expansion gas G flows are arranged. 25a.

そして、第１実施形態では、前席用保護部２５の前後方向の中間の縦膨張部２５ａを、乗員Ｃの頭部Ｈを拘束する拘束予定部２７の拘束膨張部２８として（図６参照）、拘束膨張部２８の前後に隣接する前縦膨張部２９と後縦膨張部３０の間の区画部４２，４２において、エアバッグ２０の下縁２０ｂ側の周縁部３６の近傍となる下部４２ａ側に、連通用閉塞部４３を配設させるように構成されている。第１実施形態の場合、連通用閉塞部４３は、区画部４２の上下方向の長さの約１／３程度の長さで配設されて、図４に示すように、エアバッグ２０の製造時における袋織りに使用する糸４９を、破断可能に車内側壁部２１ａと車外側壁部２１ｂとの一方から他方に延びるように配設した接結部５０により、形成している。そして、区画部４２，４２間の拘束膨張部２８が急激に内圧を上昇させた際には、接結部５０の糸４９を破断させて、連通用閉塞部４３の車内側壁部２１ａと車外側壁部２１ｂとが分離され、連通用閉塞部４３に開口４４が形成されることとなる。 And in 1st Embodiment, the longitudinal expansion part 25a of the intermediate | middle in the front-back direction of the protection part 25 for front seats is used as the restraint expansion part 28 of the plan restriction part 27 which restrains the head H of the passenger | crew C (refer FIG. 6). The lower part 42a side in the vicinity of the peripheral edge part 36 on the lower edge 20b side of the airbag 20 in the partition parts 42, 42 between the front longitudinal inflation part 29 and the rear longitudinal inflation part 30 adjacent to the front and rear of the restraint inflation part 28 In addition, the communication blocking portion 43 is arranged. In the case of the first embodiment, the communication blocking portion 43 is disposed with a length of about 1/3 of the vertical length of the partition portion 42, and as shown in FIG. The thread 49 used for bag weaving at the time is formed by a connecting portion 50 disposed so as to extend from one of the vehicle inner wall portion 21a and the vehicle outer wall portion 21b to the other in a breakable manner. When the constraining and expanding portion 28 between the partition portions 42 and 42 suddenly increases the internal pressure, the thread 49 of the connecting portion 50 is broken, and the vehicle inner side wall portion 21a and the vehicle outer side portion of the communication blocking portion 43 are broken. The wall portion 21b is separated, and an opening 44 is formed in the communication blocking portion 43.

また、第１実施形態の場合、図２，５に示すように、エアバッグ２０の下縁２０ｂ側となる拘束膨張部２８の下方の周縁部３６に、排気用閉塞部３７を配設させている。第１実施形態の場合、排気用閉塞部３７は、連通用閉塞部４３と同様に、エアバッグ２０の製造時における袋織りに使用する糸４９を、破断可能に車内側壁部２１ａと車外側壁部２１ｂとの一方から他方に延びるように配設した接結部５０により、形成されている。そして、エアバッグ２０の拘束膨張部２８付近が急激に内圧を上昇させた際に、接結部５０の糸４９を破断させて、排気用閉塞部３７の車内側壁部２１ａと車外側壁部２１ｂとが分離され、排気用閉塞部３７に開口３８が形成されることとなる。 In the case of the first embodiment, as shown in FIGS. 2 and 5, an exhaust blocking portion 37 is disposed on the peripheral edge 36 below the restraining inflating portion 28 on the lower edge 20 b side of the airbag 20. Yes. In the case of the first embodiment, the exhaust blocking portion 37 is similar to the communication blocking portion 43, so that the yarn 49 used for bag weaving at the time of manufacturing the airbag 20 can be broken to the vehicle inner wall portion 21 a and the vehicle outer wall. It is formed by the connection part 50 arrange | positioned so that it may extend from one side with the part 21b. Then, when the vicinity of the restraint inflating portion 28 of the airbag 20 suddenly increases the internal pressure, the thread 49 of the connecting portion 50 is broken, so that the vehicle inner side wall portion 21a and the vehicle outer side wall portion 21b of the exhaust closing portion 37 are broken. And an opening 38 is formed in the exhaust blocking portion 37.

なお、連通用閉塞部４３と排気用閉塞部３７との車内側壁部２１ａと車外側壁部２１ｂとの連結強度は、それぞれ、エアバッグ２０の内圧上昇時に、連通用閉塞部４３と排気用閉塞部３７との部位以外で、エアバッグ２０にガス漏れを生じさせない状態で、開口４４，３８を形成する強度として、さらに、排気用閉塞部３７が連通用閉塞部４３より連結強度を高めて設定されている。 Note that the connection strength between the vehicle inner wall 21a and the vehicle outer wall 21b of the communication blocking portion 43 and the exhaust blocking portion 37 is the same as that of the communication blocking block 43 and the exhaust blocking when the internal pressure of the airbag 20 increases. As a strength for forming the openings 44 and 38 in a state where no gas leakage occurs in the airbag 20 other than the portion with the portion 37, the exhaust blocking portion 37 is further set with a higher connection strength than the communication blocking portion 43. Has been.

このエアバッグ２０を、車両Ｖに搭載するまでの工程を説明すると、まず、エアバッグ２０を平らに展開させて、エアバッグ２０の下縁２０ｂ側を上縁２０ａ側に接近させるように、ロール折りや蛇腹折りを併用してエアバッグ２０を折り畳む。 The process until the airbag 20 is mounted on the vehicle V will be described. First, the airbag 20 is flatly deployed, and rolls are made so that the lower edge 20b side of the airbag 20 approaches the upper edge 20a side. The airbag 20 is folded using both folding and bellows folding.

そして、エアバッグ２０を折り畳んだ後には、折り崩れ防止用の破断可能な図示しないテープにより、エアバッグ２０の所定箇所をくるむとともに、インフレーター１２，取付ブラケット１０，１３を取り付けて、エアバッグ組付体を形成する。 After the airbag 20 is folded, a predetermined portion of the airbag 20 is wrapped with a breakable tape (not shown) for preventing collapse, and the inflator 12 and the mounting brackets 10 and 13 are attached to the airbag assembly. Form the body.

その後、各取付ブラケット１０，１３を、ボディ１側のインナパネル２の所定位置に配置させ、各取付孔４０ａを挿通させる等して、取付ボルト１１，１４を締め付け、各取付ブラケット１０，１３をインナパネル２に固定して、エアバッグ組付体をボディ１に取り付ける。ついで、インフレーター１２に、所定のインフレーター作動用の制御装置から延びる図示しないリード線を結線し、フロントピラーガーニッシュ４やルーフヘッドライニング５をボディ１に取り付け、さらに、リヤピラーガーニッシュ６、センターピラーガーニッシュ７をボディ１に取り付ければ、エアバッグ装置Ｍを、車両Ｖに搭載することができる。 Thereafter, the mounting brackets 10 and 13 are arranged at predetermined positions on the inner panel 2 on the body 1 side, and the mounting bolts 11 and 14 are tightened by inserting the mounting holes 40a, etc. The airbag assembly is fixed to the inner panel 2 and attached to the body 1. Next, lead wires (not shown) extending from a predetermined control device for inflator operation are connected to the inflator 12, the front pillar garnish 4 and the roof head lining 5 are attached to the body 1, and the rear pillar garnish 6 and the center pillar garnish 7 are further attached. If attached to the body 1, the airbag device M can be mounted on the vehicle V.

そして、エアバッグ装置Ｍの車両Ｖへの搭載後、インフレーター１２が作動されれば、インフレーター１２からの膨張用ガスＧが、図２の二点鎖線に示すように、接続口部２２からガス供給路部２３に流入し、前後方向両側に向かって、ガス供給路部２３を流れて、さらに、エアバッグ２０の保護膨張部２４が、折りを解消させつつ、展開し、さらに、膨張し始める。そして、エアバッグ２０は、くるんでおいた図示しないテープを破断させ、さらに、フロントピラーガーニッシュ４やルーフヘッドライニング５の下縁４ａ，５ａ側のエアバッグカバー８を押し開いて、図１の二点鎖線や図６に示すように、下方へ突出しつつ、サイドウインドＷ１，Ｗ２，センターピラー部ＣＰ，リヤピラー部ＲＰの車内側Ｉを覆うように、大きく展開膨張することとなる。 When the inflator 12 is activated after the airbag device M is mounted on the vehicle V, the inflation gas G from the inflator 12 is supplied from the connection port 22 as shown by a two-dot chain line in FIG. The air flows into the passage portion 23, flows in the gas supply passage portion 23 toward both sides in the front-rear direction, and further, the protective inflating portion 24 of the airbag 20 is deployed while being unfolded, and further begins to inflate. Then, the airbag 20 breaks the wrapped tape (not shown), and further pushes and opens the airbag cover 8 on the lower edges 4a and 5a side of the front pillar garnish 4 and the roof head lining 5, thereby As shown in the dotted line and FIG. 6, it expands and expands greatly so as to cover the vehicle inner side I of the side windows W1, W2, the center pillar portion CP, and the rear pillar portion RP while protruding downward.

この時、図７，８に示すように、乗員Ｃの頭部ＨがサイドウインドＷ１に接近している場合には、サイドウインドＷ１の上方側から展開して、頭部Ｈの側方に前席用保護部２５を配置させるように展開させて、厚さを増すように膨らむ際、乗員Ｃの頭部Ｈが、拘束膨張部２８に対して干渉し（当たり）、拘束膨張部２８が内圧を局部的にかつ急激に上昇させても、連通用閉塞部４３が接結部５０の糸４９を破断させて（図４参照）、車内側壁部２１ａと車外側壁部２１ｂとを分離させて開口４４を形成するため（図７のＢ、図８のＡ参照）、連通用閉塞部４３を間にして隣接する前縦膨張部２９や後縦膨張部３０に、開口４４を経て膨張用ガスＧを逃がすことができる（図４参照）。 At this time, as shown in FIGS. 7 and 8, when the head H of the occupant C is approaching the side window W1, it is unfolded from the upper side of the side window W1 and moved forward to the side of the head H. When the seat protection unit 25 is deployed and expanded so as to increase in thickness, the head H of the occupant C interferes with the constraining expansion unit 28 (hits), and the constraining expansion unit 28 is subjected to internal pressure. Even if the vehicle is raised locally and rapidly, the communication blocking portion 43 breaks the thread 49 of the connecting portion 50 (see FIG. 4), and separates the vehicle interior side wall portion 21a and the vehicle exterior wall portion 21b. In order to form the opening 44 (see FIG. 7B and FIG. 8A), the expansion gas passes through the opening 44 to the adjacent front longitudinal expansion portion 29 and rear longitudinal expansion portion 30 with the communication blocking portion 43 therebetween. G can escape (see FIG. 4).

さらに、連通用閉塞部４３は、車内側壁部２１ａと車外側壁部２１ｂとを結合させて上下方向に延びる区画部４２の下部４２ａ側に配置されているものであり、開口すれば、車内側壁部２１ａと車外側壁部２１ｂとを車内外方向で離す状態となって、前席用保護部２５の容積を増大させる態様となる（図４の二点鎖線参照）。すなわち、連通用閉塞部４３を開口させて、乗員Ｃの頭部Ｈと干渉していた拘束膨張部２８から膨張用ガスＧを逃がすことができるとともに、その拘束膨張部２８の容積が増大することから、乗員Ｃの頭部Ｈと干渉していた拘束膨張部２８の内圧を、迅速に低下させることができ、乗員Ｃの頭部Ｈに対する押圧力を低減できる（図８参照）。 Further, the communication blocking portion 43 is disposed on the lower portion 42a side of the partition portion 42 that extends in the vertical direction by connecting the vehicle inner wall portion 21a and the vehicle outer wall portion 21b. The part 21a and the vehicle outer wall part 21b are separated from each other in the vehicle interior and exterior directions, and the volume of the front seat protection unit 25 is increased (see the two-dot chain line in FIG. 4). That is, the communication blocking portion 43 is opened so that the inflation gas G can escape from the restraint inflation portion 28 that has interfered with the head H of the occupant C, and the volume of the restraint inflation portion 28 increases. Therefore, the internal pressure of the restraint expansion part 28 that has interfered with the head H of the occupant C can be quickly reduced, and the pressing force against the head H of the occupant C can be reduced (see FIG. 8).

また、このような内圧を低下させる部位が、縦膨張部２５ａを区画する区画部４２から構成されており、エアバッグ２０の使用材料の無駄を、極力、無くすことができる。 Moreover, the site | part which reduces such an internal pressure is comprised from the division part 42 which divides the vertical expansion part 25a, and can eliminate the waste of the material used for the airbag 20 as much as possible.

そして、連通用閉塞部４３は、急激な内圧上昇が無ければ、開口しないことから、上部のガス流入口２５ｂから流入する膨張用ガスＧにより、連通用閉塞部４３を間にして隣接する拘束膨張部２８、前縦膨張部２９、及び、後縦膨張部３０の膨張完了を促進させることができて、乗員Ｃの頭部Ｈの拘束膨張部２８における初期拘束時に、十分な内圧を容易に確保できる。 Since the communication blocking portion 43 does not open unless there is a sudden increase in internal pressure, the expansion gas G flowing from the upper gas inlet 25b causes the constrained expansion adjacent to the communication blocking portion 43. Completion of expansion of the portion 28, the front vertical expansion portion 29, and the rear vertical expansion portion 30 can be promoted, and sufficient internal pressure can be easily secured at the time of initial restraint in the restraint expansion portion 28 of the head H of the occupant C. it can.

勿論、エアバッグ２０は、拘束膨張部２８が内圧を局部的にかつ急激に上昇させても、連通用閉塞部４３が開口すれば、連通用閉塞部４３を間にして隣接する前縦膨張部２９や後縦膨張部３０側に膨張用ガスＧを逃がすことができ、容積増大による内圧の上昇の抑制とともに、エアバッグ２０の全体で内圧上昇を吸収することができて、エアバッグ２０の破損を招くことなく、エアバッグ２０のガス漏れを防止できる。 Of course, even if the restraint inflation part 28 raises the internal pressure locally and rapidly, the airbag 20 can be adjacent to the front longitudinal inflation part with the communication closure part 43 therebetween if the communication closure part 43 opens. 29 and the rear longitudinal inflating portion 30 can escape the inflation gas G, suppress the increase in the internal pressure due to the increase in volume, absorb the increase in the internal pressure of the entire airbag 20, and damage the airbag 20. The gas leakage of the airbag 20 can be prevented without incurring the problem.

したがって、第１実施形態の頭部保護用のエアバッグ２０では、使用材料の無駄を抑えて、乗員Ｃの頭部Ｈを受け止める拘束予定部２７としての縦膨張部２５ａ（拘束膨張部２８）が、局部的かつ急激に内圧を上昇させても、迅速に、内圧を低下させることができる。 Accordingly, in the airbag 20 for protecting the head of the first embodiment, the vertical inflating portion 25a (restraining inflating portion 28) serving as the restraining scheduled portion 27 that receives the head H of the occupant C while suppressing waste of used material is provided. Even if the internal pressure is increased locally and rapidly, the internal pressure can be rapidly reduced.

そして、第１実施形態の場合には、エアバッグ２０の周縁部３６に、排気用閉塞部３７が配設されている。そのため、連通用閉塞部４３が開口して、容積増大による内圧の上昇の抑制とともに、エアバッグ２０の全体で内圧上昇を吸収する際、その内圧が、著しく上昇することとなっても、排気用閉塞部３７の接結部５０の糸４９が破断して、排気用閉塞部３７の車内側壁部２１ａと車外側壁部２１ｂとを離して開口３８が形成されるため（図５、図８のＢ参照）、開口３８を経てエアバッグ２０外へ膨張用ガスＧを排気できる。そのため、拘束膨張部２８の急激な内圧上昇をエアバッグ２０全体で吸収し切れなかった場合でも、エアバッグ２０の破損を防止できて、拘束膨張部２８は、乗員Ｃの頭部Ｈを保護できる内圧を確保できる。 In the case of the first embodiment, an exhaust blocking portion 37 is disposed on the peripheral edge 36 of the airbag 20. Therefore, when the communication blocking portion 43 is opened to suppress the increase in the internal pressure due to the increase in volume and absorb the increase in the internal pressure in the entire airbag 20, The thread 49 of the connecting portion 50 of the closing portion 37 is broken, and the opening 38 is formed by separating the vehicle inner wall portion 21a and the vehicle outer side wall portion 21b of the exhaust closing portion 37 (see FIGS. 5 and 8). B), the inflation gas G can be exhausted out of the airbag 20 through the opening 38. Therefore, even when the rapid increase in internal pressure of the restraint inflatable portion 28 is not completely absorbed by the entire airbag 20, damage to the airbag 20 can be prevented, and the restraint inflatable portion 28 can protect the head H of the occupant C. Internal pressure can be secured.

特に、第１実施形態のエアバッグ２０では、拘束膨張部２８の前後に、連通用閉塞部４３を備えた区画部４２によって区画された前縦膨張部２９と後縦膨張部３０とを配設させて、排気用閉塞部３７が、拘束膨張部２８の下方に配設されている。そのため、拘束膨張部２８の急激な内圧上昇時、隣接する二つの連通用閉塞部４３を開口させることができ、二つの連通用閉塞部４３を開口させれば、一層迅速に、拘束膨張部２８の内圧を低減でき（図４の二点鎖線参照）、さらに、その内圧抑制が十分でない場合でも、直下の排気用閉塞部３７を開口させて、拘束膨張部２８内の膨張用ガスＧを極めて迅速にエアバッグ外に排気できる。そのため、拘束膨張部２８が、著しく急激に内圧を上昇させても、破損することなく、かつ、反力を抑えて、乗員Ｃの頭部Ｈを受け止めることが可能となる。 In particular, in the airbag 20 according to the first embodiment, the front longitudinal inflating portion 29 and the rear longitudinal inflating portion 30 that are partitioned by the partitioning portion 42 having the communication blocking portion 43 are disposed before and after the restraining inflating portion 28. Thus, the exhaust blocking portion 37 is disposed below the restraining expansion portion 28. Therefore, when the internal pressure of the restraining / expanding portion 28 is suddenly increased, the two adjacent communication blocking portions 43 can be opened. If the two communication closing portions 43 are opened, the restraining / expanding portion 28 can be more quickly performed. (See the two-dot chain line in FIG. 4), and even if the internal pressure is not sufficiently suppressed, the exhaust gas closing G 37 is made extremely open by opening the exhaust closing portion 37 directly below. The air can be quickly exhausted outside the airbag. Therefore, even if the restraint expansion part 28 raises internal pressure remarkably rapidly, it becomes possible to receive the head H of the passenger | crew C, without breaking and suppressing reaction force.

なお、上記の点を考慮すれば、図２の二点鎖線に示すように、前縦膨張部２９と後縦膨張部３０との一方若しくは両方の下方の周縁部３６に、排気用閉塞部３７を設けてもよい。 In consideration of the above points, as shown by a two-dot chain line in FIG. 2, an exhaust blocking portion 37 is provided on the peripheral portion 36 below one or both of the front vertical expansion portion 29 and the rear vertical expansion portion 30. May be provided.

また、第１実施形態のエアバッグ２０が、袋織りにより形成されて、連通用閉塞部４３や排気用閉塞部３７が、袋織りに使用する糸４９を破断可能に車内側壁部２１ａと車外側壁部２１ｂとの一方から他方に延びるように配設した接結部５０により、構成しており、エアバッグ２０の袋織り時に、連通用閉塞部４３や排気用閉塞部３７を容易に形成できる。 Further, the airbag 20 of the first embodiment is formed by bag weaving, and the communication blocking portion 43 and the exhaust blocking portion 37 allow the thread 49 used for bag weaving to be broken and the vehicle inner side wall portion 21a and the vehicle outer side. The connecting portion 50 is provided so as to extend from one side to the other side with the wall portion 21b, and the communication blocking portion 43 and the exhaust blocking portion 37 can be easily formed when the airbag 20 is woven. .

なお、袋織りして製造するエアバッグ２０であっても、連通用閉塞部４３を、破断可能な縫合糸を使用して、車内側壁部２１ａと車外側壁部２１ｂとを縫合して形成してもよい。 Even in the case of the airbag 20 manufactured by weaving a bag, the communication blocking portion 43 is formed by stitching the vehicle inner wall portion 21a and the vehicle outer wall portion 21b using a breakable suture. May be.

また、外周縁側の周縁部３６に設ける排気用閉塞部３７は、エアバッグ２０が袋織りで形成されていても、図９，１０に示すように、破断可能な縫合糸５２を使用して、車内側壁部２１ａと車外側壁部２１ｂとを縫合して形成する他、図１１，１２に示すように、剥離可能な接着剤５４を使用して、車内側壁部２１ａと車外側壁部２１ｂとを接着させて形成したり、あるいは、縫合と接着とを併用して、排気用閉塞部３７を形成してもよい。 Further, the exhaust blocking portion 37 provided on the peripheral edge 36 on the outer peripheral edge side uses a breakable suture 52 as shown in FIGS. 9 and 10 even when the airbag 20 is formed of a bag weave. In addition to stitching the vehicle inner wall 21a and the vehicle outer wall 21b, as shown in FIGS. 11 and 12, using a peelable adhesive 54, the vehicle inner wall 21a and the vehicle outer wall 21b Alternatively, the exhaust blocking portion 37 may be formed by combining stitching and bonding.

さらに、図１３〜１６に示すエアバッグ２０Ａのように、連通用閉塞部４３Ａとして、エアバッグ２０Ａの下縁２０ｂ側からくるんで結束するとともに、連通用閉塞部４３Ａの開口時に破断する結束材５６から構成してもよい。結束材５６は、エアバッグ２０Ａとともに折り畳み可能な可撓性を有したポリアミド等の織布等からなるテープ材から形成されている。このエアバッグ２０Ａでは、拘束膨張部２８に隣接する後方側の区画部４２Ａだけに、連通用閉塞部４３Ａが配設されている。この区画部４２Ａには、下部４２ａ側に、予め、開口４４が形成されており、そして、開口４４の上縁付近に、結束材５６を挿通させる車内外方向に貫通する貫通孔５７が配設され、結束材５６が、貫通孔５７を貫通して、貫通孔５７からエアバッグ２０Ａの下縁２０ｂまでの部位を、巻いた状態で、結束して開口４４を閉塞している。なお、エアバッグ２０Ａの排気用閉塞部３７Ａは、エアバッグ２０Ａの袋織り時に、接結部５０を設けて形成している。 Further, as in the airbag 20A shown in FIGS. 13 to 16, as the communication blocking portion 43A, the binding material 56 is bundled by wrapping from the lower edge 20b side of the airbag 20A and is broken when the communication blocking portion 43A is opened. You may comprise. The binding material 56 is formed of a tape material made of a woven fabric such as polyamide having flexibility that can be folded together with the airbag 20A. In the airbag 20 A, the communication blocking portion 43 A is disposed only in the rear partitioning portion 42 A adjacent to the restraining inflating portion 28. In the partition portion 42A, an opening 44 is formed in advance on the lower portion 42a side, and a through hole 57 penetrating in the vehicle interior / exit direction through which the binding material 56 is inserted is disposed near the upper edge of the opening 44. The binding material 56 passes through the through hole 57 and binds to close the opening 44 in a state where the part from the through hole 57 to the lower edge 20b of the airbag 20A is wound. The exhaust blocking portion 37A of the airbag 20A is formed by providing the connecting portion 50 when the airbag 20A is woven.

このエアバッグ２０Ａでも、結束材５６を結束して連通用閉塞部４３Ａを形成しておくだけで、第１実施形態のエアバッグ２０と同様に折り畳んで、車両Ｖに搭載することとなる。そして、車両Ｖへの搭載後、インフレーター１２（図１３，１４参照）が作動されれば、インフレーター１２からの膨張用ガスＧが、図１４の二点鎖線に示すように、接続口部２２からガス供給路部２３に流入し、前後方向両側に向かって、ガス供給路部２３を流れて、さらに、エアバッグ２０Ａの保護膨張部２４が、折りを解消させつつ、展開膨張し、図１５，１６に示すように、エアバッグカバー８を押し開いて、下方へ突出しつつ、サイドウインドＷ１の車内側Ｉを覆うように、大きく展開膨張することとなる。 Even in the airbag 20A, the binding material 56 is simply bundled to form the communication blocking portion 43A, and the airbag 20A is folded and mounted on the vehicle V in the same manner as the airbag 20 of the first embodiment. When the inflator 12 (see FIGS. 13 and 14) is operated after being mounted on the vehicle V, the inflation gas G from the inflator 12 passes through the connection port 22 as shown by a two-dot chain line in FIG. The gas inflows into the gas supply path 23, flows through the gas supply path 23 toward both sides in the front-rear direction, and further, the protective inflating part 24 of the airbag 20A is deployed and inflated while eliminating the folding, FIG. As shown in FIG. 16, the airbag cover 8 is pushed open and protrudes downward, and the airbag cover 8 is expanded and inflated so as to cover the vehicle interior I of the side window W1.

この時、頭部Ｈの側方に前席用保護部２５を配置させるように展開させて、厚さを増すように膨らむ際、乗員Ｃの頭部Ｈが、拘束膨張部２８に対して干渉し、拘束膨張部２８が内圧を局部的にかつ急激に上昇させても、連通用閉塞部４３Ａの結束材５６を破断させて、車内側壁部２１ａと車外側壁部２１ｂとを分離させて開口４４を形成するため（図１５のＢ、図１６のＡ参照）、連通用閉塞部４３Ａを間にして隣接する後縦膨張部３０に、開口４４を経て膨張用ガスＧを逃がすことができ、さらに、内圧の抑制が十分でなければ、排気用閉塞部３７Ａが開口３８を形成して（図１６のＢ参照）、膨張用ガスＧをエアバッグ２０Ａ外に逃がすことから、第１実施形態のエアバッグ２０と略同様な作用・効果を得ることができる。 At this time, when the front seat protection unit 25 is deployed so as to be disposed on the side of the head H and is inflated to increase the thickness, the head H of the occupant C interferes with the restraint expansion unit 28. Even if the restraint expansion part 28 increases the internal pressure locally and suddenly, the binding material 56 of the communication blocking part 43A is broken to separate the vehicle inner side wall part 21a and the vehicle outer side wall part 21b and open it. 44 (see FIG. 15B and FIG. 16A), the expansion gas G can escape through the opening 44 to the adjacent rear longitudinal expansion portion 30 with the communication blocking portion 43A in between. Furthermore, if the internal pressure is not sufficiently suppressed, the exhaust blocking portion 37A forms the opening 38 (see B in FIG. 16), and the inflation gas G is released outside the airbag 20A. Actions and effects similar to those of the airbag 20 can be obtained.

そして、このエアバッグ２０Ａでは、エアバッグ２０Ａを袋織りして製造した後に、結束材５６を組み付ける構成であって、結束材５６の選択によって、連通用閉塞部４３Ａの開口する拘束膨張部２８の内圧値を、容易に変更することができる。 In the airbag 20A, after the airbag 20A is manufactured by weaving, the binding material 56 is assembled, and by selecting the binding material 56, the restraining inflating portion 28 opened by the communication blocking portion 43A is formed. The internal pressure value can be easily changed.

また、エアバッグとしては、第１実施形態の袋織りタイプでなく、図１７，１８に示す第２実施形態のエアバッグ２０Ｂのように、ポリアミドやポリエステル等の織布からなる別体の車内側壁部２１ａと車外側壁部２１ｂとを縫合や接着して形成する結合タイプから構成してもよい。なお、第２実施形態の場合、連通用閉塞部４３Ｂと排気用閉塞部３７Ｂとを除いて、非流入部３５の周縁部３６や区画部４１，４２を、縫合糸５８の縫合と接着剤５９の接着とを併用して、形成している。 Moreover, as an airbag, it is not the bag weave type of 1st Embodiment, but the separate vehicle interior side wall which consists of woven fabrics, such as polyamide and polyester, like the airbag 20B of 2nd Embodiment shown in FIG. You may comprise from the coupling | bonding type formed by sewing or adhere | attaching the part 21a and the vehicle outer side wall part 21b. In the case of the second embodiment, except for the communication blocking portion 43B and the exhaust blocking portion 37B, the peripheral portion 36 and the partition portions 41 and 42 of the non-inflow portion 35 are sewn with the suture 58 and the adhesive 59. It is formed by using together with adhesion.

そして、区画部４２の下部４２ａの連通用閉塞部４３Ｂと、拘束膨張部２８の下方の周縁部３６に設けた排気用閉塞部３７Ｂとは、拘束膨張部２８の急激な内圧上昇時に、車内側壁部２１ａと車外側壁部２１ｂとを分離させて開口４４，２８を形成可能に、区画部４２の上部４２ｂや周縁部３６における排気用閉塞部３７Ｂの部位以外の部位と相違し、接着剤５９を使用しない構成として、縫合糸５８の破断が可能な縫合により、形成されている。なお、連通用閉塞部４３Ｂと排気用閉塞部３７Ｂとの車内側壁部２１ａと車外側壁部２１ｂとの連結強度は、それぞれ、エアバッグ２０Ｂの内圧上昇時に、連通用閉塞部４３Ｂと排気用閉塞部３７Ｂとの部位以外で、エアバッグ２０Ｂにガス漏れを生じさせない状態で、開口４４，３８を形成する強度として、さらに、排気用閉塞部３７Ｂが連通用閉塞部４３Ｂより連結強度を高めて設定されている。 The communication blocking part 43B in the lower part 42a of the partition part 42 and the exhaust blocking part 37B provided in the peripheral edge part 36 below the restricting / expanding part 28 cause the inner wall of the vehicle when the internal pressure of the restricting / expanding part 28 increases suddenly. Unlike the portion other than the portion of the exhaust blocking portion 37B in the upper portion 42b and the peripheral portion 36 of the partition portion 42, the adhesive 59 can be formed so that the openings 44 and 28 can be formed by separating the portion 21a and the vehicle outer side wall portion 21b. As a configuration that does not use, the suture thread 58 can be ruptured. It should be noted that the connection strength between the vehicle inner wall portion 21a and the vehicle outer wall portion 21b of the communication blocking portion 43B and the exhaust blocking portion 37B is the same as that of the communication blocking portion 43B and the exhaust blocking block when the internal pressure of the airbag 20B increases. As a strength for forming the openings 44 and 38 in a state that does not cause gas leakage to the airbag 20B other than the portion with the portion 37B, the exhaust blocking portion 37B is set with a higher connection strength than the communication blocking portion 43B. Has been.

この第２実施形態のエアバッグ２０Ｂでも、第１実施形態のエアバッグ２０と同様に折り畳んで、車両Ｖに搭載することとなる。そして、車両Ｖへの搭載後、接続口部２２に接続させたインフレーター１２（図１７参照）が作動されれば、インフレーター１２からの膨張用ガスＧが、図１７の二点鎖線に示すように、接続口部２２からガス供給路部２３に流入し、前後方向両側に向かって、ガス供給路部２３を流れて、さらに、エアバッグ２０の保護膨張部２４が、折りを解消させつつ、展開膨張し、図１９，２０に示すように、エアバッグカバー８を押し開いて、下方へ突出しつつ、サイドウインドＷ１の車内側Ｉを覆うように、大きく展開膨張することとなる。 The airbag 20B of the second embodiment is also folded and mounted on the vehicle V in the same manner as the airbag 20 of the first embodiment. And if the inflator 12 (refer FIG. 17) connected to the connection port part 22 is operated after mounting in the vehicle V, the expansion gas G from the inflator 12 will be shown by the dashed-two dotted line of FIG. Then, the gas flows into the gas supply path portion 23 from the connection port portion 22 and flows through the gas supply path portion 23 toward both sides in the front-rear direction, and further, the protective inflating portion 24 of the airbag 20 is deployed while eliminating the folding. As shown in FIGS. 19 and 20, the airbag cover 8 is pushed open, and is expanded and inflated so as to cover the vehicle interior I of the side window W1 while protruding downward.

この時、頭部Ｈの側方に前席用保護部２５を配置させるように展開させて、厚さを増すように膨らむ際、乗員Ｃの頭部Ｈが、拘束膨張部２８に対して干渉し、拘束膨張部２８が内圧を局部的にかつ急激に上昇させても、連通用閉塞部４３Ｂの縫合糸５８を破断させて、車内側壁部２１ａと車外側壁部２１ｂとを分離させて開口４４を形成するため（図１９のＢ、図２０のＡ参照）、連通用閉塞部４３Ｂを間にして隣接する前縦膨張部２９と後縦膨張部３０に、開口４４を経て膨張用ガスＧを逃がすことができ、さらに、内圧の抑制が十分でなければ、排気用閉塞部３７Ｂが縫合糸５８を破断させて開口３８を形成し（図２０のＢ参照）、膨張用ガスＧをエアバッグ２０Ｂ外に逃がすことから、第１実施形態のエアバッグ２０と同様な作用・効果を得ることができる。 At this time, when the front seat protection unit 25 is deployed so as to be disposed on the side of the head H and is inflated to increase the thickness, the head H of the occupant C interferes with the restraint expansion unit 28. Even if the restraint / expansion portion 28 increases the internal pressure locally and rapidly, the suture thread 58 of the communication blocking portion 43B is broken to separate the vehicle inner side wall portion 21a and the vehicle outer side wall portion 21b. 44 (see FIG. 19B and FIG. 20A), the expansion gas G passes through the opening 44 to the front longitudinal expansion portion 29 and the rear vertical expansion portion 30 adjacent to each other with the communication blocking portion 43B interposed therebetween. If the internal pressure is not sufficiently suppressed, the exhaust blocking portion 37B breaks the suture thread 58 to form the opening 38 (see B in FIG. 20), and the inflation gas G is taken into the airbag. Because it escapes to the outside of 20B, the same action and effect as the airbag 20 of the first embodiment. It is possible to obtain.

なお、第２実施形態のエアバッグ２０Ｂにおいて、図２１に示すように、連通用閉塞部４３Ｂや排気用閉塞部３７Ｂを、拘束膨張部２８の急激な内圧上昇時に、車内側壁部２１ａと車外側壁部２１ｂとを分離させて開口４４，２８を形成可能に、区画部４２の上部４２ｂや周縁部３６における排気用閉塞部３７Ｂの部位以外の部位と相違し、縫合しない構成として、剥離可能な接着剤５９を塗布するだけの構成として、形成してもよい。勿論、連通用閉塞部４３Ｂや排気用閉塞部３７Ｂは、開口可能であれば、縫合と接着とを併用してもよい。 In the airbag 20B according to the second embodiment, as shown in FIG. 21, the communication blocking portion 43B and the exhaust blocking portion 37B are separated from the vehicle interior side wall portion 21a and the vehicle exterior side when the internal pressure of the restraint inflation portion 28 is suddenly increased. It is possible to form the openings 44 and 28 by separating the wall portion 21b from the upper portion 42b of the partitioning portion 42 and the portions other than the portion of the exhaust blocking portion 37B in the peripheral portion 36, and can be peeled off as a configuration that does not sew. Alternatively, the adhesive 59 may be simply applied. Of course, as long as the communication blocking portion 43B and the exhaust blocking portion 37B can be opened, stitching and adhesion may be used in combination.

また、図１７や図２１に示すエアバッグ２０Ｂにおいても、前縦膨張部２９と後縦膨張部３０との一方若しくは両方の下方の周縁部３６に、排気用閉塞部３７Ｂを設けてもよい。 Also, in the airbag 20B shown in FIG. 17 and FIG. 21, an exhaust blocking part 37B may be provided on the peripheral edge 36 below one or both of the front longitudinal inflation part 29 and the rear longitudinal inflation part 30.

本発明の第１実施形態のエアバッグが使用される頭部保護用のエアバッグ装置の車両搭載状態を示す概略正面図である。It is a schematic front view which shows the vehicle mounting state of the airbag apparatus for head protection in which the airbag of 1st Embodiment of this invention is used. 第１実施形態のエアバッグの正面図である。It is a front view of the airbag of a 1st embodiment. 第１実施形態のエアバッグにおける膨張時の部分横断面図であり、図２のIII−III部位に対応する。FIG. 3 is a partial cross-sectional view when the airbag of the first embodiment is inflated, and corresponds to a III-III portion in FIG. 2. 第１実施形態のエアバッグにおける膨張時の部分横断面図であり、図２のIV−IV部位に対応し、連通用閉塞部が開口した状態を二点鎖線で示している。FIG. 4 is a partial cross-sectional view when the airbag of the first embodiment is inflated, and shows a state in which a communication blocking portion is opened corresponding to the IV-IV portion in FIG. 2 by a two-dot chain line. 第１実施形態のエアバッグにおける膨張時の部分縦断面図であり、図２のＶ−Ｖ部位に対応し、排気用閉塞部が開口した状態を二点鎖線で示している。It is the fragmentary longitudinal cross-section at the time of expansion | swelling in the airbag of 1st Embodiment, and the state which respond | corresponded to the VV site | part of FIG. 2 and the obstruction | occlusion part for exhaust_gas | exhaustion opened is shown with the dashed-two dotted line. 第１実施形態のエアバッグの膨張時における展開完了時の状態を、車内側から見た概略正面図である。It is the schematic front view which looked at the state at the time of completion of deployment at the time of inflation of the airbag of a 1st embodiment from the car inside. 第１実施形態のエアバッグの膨張時における車両搭載状態の縦断面図である。It is a longitudinal cross-sectional view of the vehicle mounting state at the time of expansion | swelling of the airbag of 1st Embodiment. 第１実施形態のエアバッグの膨張時における車両搭載状態の縦断面図であり、図７の後の状態を示す。It is a longitudinal cross-sectional view of the vehicle mounting state at the time of expansion | swelling of the airbag of 1st Embodiment, and shows the state after FIG. 第１実施形態のエアバッグの排気用閉塞部の変形例を示す部分正面図である。It is a partial front view which shows the modification of the obstruction | occlusion part for exhaust_gas | exhaustion of the airbag of 1st Embodiment. 図９に示す排気用閉塞部の開口状態を示す図である。It is a figure which shows the opening state of the obstruction | occlusion part for exhaust shown in FIG. 第１実施形態のエアバッグの排気用閉塞部の他の変形例を示す部分正面図である。It is a partial front view which shows the other modification of the obstruction | occlusion part for exhaust_gas | exhaustion of the airbag of 1st Embodiment. 図１１に示す排気用閉塞部の開口状態を示す図である。It is a figure which shows the opening state of the obstruction | occlusion part for exhaust shown in FIG. 第１実施形態のエアバッグの変形例を示す正面図である。It is a front view which shows the modification of the airbag of 1st Embodiment. 図１３に示すエアバッグに連通用閉塞部を形成した状態を示す正面図である。It is a front view which shows the state which formed the communication obstruction | occlusion part in the airbag shown in FIG. 図１３に示すエアバッグの膨張時における車両搭載状態の縦断面図である。It is a longitudinal cross-sectional view of the vehicle mounting state at the time of inflation of the airbag shown in FIG. 図１３に示すエアバッグの膨張時における車両搭載状態の縦断面図であり、図１５の後の状態を示す。FIG. 16 is a longitudinal sectional view of the vehicle mounted state when the airbag shown in FIG. 13 is inflated, and shows a state after FIG. 15. 第２実施形態のエアバッグを示す正面図である。It is a front view which shows the airbag of 2nd Embodiment. 第２実施形態のエアバッグの膨張時を示す部分横断面図であり、図１７のXVIII−XVIII部位に対応する。It is a fragmentary cross-sectional view which shows the time of inflation of the airbag of 2nd Embodiment, and respond | corresponds to the XVIII-XVIII site | part of FIG. 第２実施形態のエアバッグの膨張時における車両搭載状態の縦断面図である。It is a longitudinal cross-sectional view of the vehicle mounting state at the time of expansion | swelling of the airbag of 2nd Embodiment. 第２実施形態のエアバッグの膨張時における車両搭載状態の縦断面図であり、図１９の後の状態を示す。FIG. 20 is a longitudinal sectional view of a vehicle mounted state when the airbag of the second embodiment is inflated, and shows a state after FIG. 19. 第２実施形態のエアバッグの変形例を示す正面図である。It is a front view which shows the modification of the airbag of 2nd Embodiment.

符号の説明Explanation of symbols

２０，２０Ａ，２０Ｂ…エアバッグ、
２１ａ…車内側壁部、
２１ｂ…車外側壁部、
２４…保護膨張部、
２５ａ…縦膨張部、
２５ｂ…ガス流入口、
２７…拘束予定部、
３６…周縁部、
３７・３７Ａ・３７Ｂ…排気用閉塞部、
３８…開口、
４２…区画部、
４３・４３Ａ・４３Ｂ…連通用閉塞部、
４４…開口、
５０…接結部、
５２・５８…縫合糸、
５４・５９…接着剤、
５６…拘束材、
Ｖ…車両、
Ｗ１…サイドウインド、
Ｇ…膨張用ガス、
Ｍ…頭部保護用のエアバッグ装置。 20, 20A, 20B ... airbags,
21a ... the inner wall of the vehicle,
21b ... car outer wall part,
24 ... Protective expansion part,
25a ... longitudinal expansion part,
25b ... Gas inlet,
27 ... Restricted planned part,
36 ... peripheral part,
37 / 37A / 37B: Exhaust blocking part,
38 ... Opening,
42 ... partition section,
43, 43A, 43B ... communication blockage,
44 ... opening,
50 ... Connection part,
52.58 ... suture,
54, 59 ... Adhesive,
56 ... restraint material,
V ... Vehicle,
W1 ... Sidewind,
G ... expansion gas,
M: An airbag device for protecting the head.

Claims

車内側壁部と車外側壁部との間に流入する膨張用ガスによって膨張しつつ、折り畳まれて収納された車両のサイドウインドの上方側から展開して、乗員頭部の側方に保護膨張部を配置させ、
前記保護膨張部が、前記車内側壁部と前記車外側壁部とを結合させて上下方向に延びる区画部により区画されて、前後方向に沿って並設される複数の縦膨張部を備えて構成され、
複数の前記縦膨張部が、それぞれ、上部に膨張用ガスを流入させるガス流入口を配設させて構成される頭部保護エアバッグであって、
複数の前記縦膨張部の内の一つが、乗員頭部を受け止める拘束予定部として配設され、
該拘束予定部の縦膨張部に隣接する少なくとも一つの前記区画部が、
前記車内側壁部と前記車外側壁部とを結合させて前記エアバッグの外周縁を形成する周縁部における前記エアバッグの下縁側の部位まで、下方に延びるように配設されるとともに、前記エアバッグの下縁側の近傍部位となる下部側に、前記拘束予定部の縦膨張部が前記区画部を間にして隣接する縦膨張部より内圧を上昇させた際に、隣接する前記縦膨張部相互を連通させるように開口する連通用閉塞部を配設させて、構成されていることを特徴とする頭部保護エアバッグ。 A protective inflating part that is expanded from the upper side of the side window of the vehicle that is folded and stored while being inflated by an inflating gas flowing between the inner side wall part and the outer side wall part of the vehicle, to the side of the passenger head Arrange
The protective expansion portion includes a plurality of vertical expansion portions that are partitioned by a partition portion that extends in the vertical direction by connecting the vehicle inner wall portion and the vehicle outer wall portion, and that are arranged in parallel along the front-rear direction. And
Each of the plurality of longitudinally expanding portions is a head protecting airbag configured by disposing a gas inflow port for allowing an inflating gas to flow into the upper portion,
One of the plurality of longitudinally expanding portions is disposed as a restraint scheduled portion that receives the occupant head,
At least one of the partitioning portions adjacent to the longitudinal expansion portion of the planned restraining portion,
The vehicle inner wall portion and the vehicle outer wall portion are connected to each other so as to extend downward to a lower edge side portion of the airbag at a peripheral edge portion forming an outer peripheral edge of the airbag. When the longitudinal expansion portion of the planned restraining portion raises the internal pressure from the adjacent vertical expansion portion with the partition portion in between, the adjacent vertical expansion portions are adjacent to each other on the lower side, which is a portion near the lower edge side of the bag. A head protection airbag characterized in that a communication blocking portion that opens so as to communicate with each other is disposed.

前記エアバッグの前記周縁部に、前記エアバッグの内圧上昇時に、エアバッグ外に膨張用ガスを排気可能に開口する排気用閉塞部が、配設されていることを特徴とする請求項１に記載の頭部保護エアバッグ。 The exhaust gas closing part which opens the gas for inflation to the outside of the air bag when the internal pressure of the air bag rises is arranged at the peripheral part of the air bag. The head protection airbag described.

前記拘束予定部の縦膨張部の前後に、前記連通用閉塞部を備えた前記区画部によって区画されて、縦膨張部が配設される構成とし、
前記排気用閉塞部が、前記拘束予定部の縦膨張部と該縦膨張部に前後で隣接する縦膨張部の内、少なくとも前記拘束予定部の縦膨張部の下方に、配設されていることを特徴とする請求項２に記載の頭部保護エアバッグ。 Before and after the longitudinal expansion portion of the planned restraining portion, the vertical expansion portion is disposed by being partitioned by the partition portion provided with the communication blocking portion,
The exhaust blocking portion is disposed at least below the vertical expansion portion of the planned restraining portion, among the vertical expansion portion of the planned restraining portion and the vertical expansion portion adjacent to the vertical expansion portion in the front-rear direction. The head protection airbag according to claim 2.

前記エアバッグが、袋織りにより形成され、
前記連通用閉塞部が、袋織りに使用する糸を破断可能に前記車内側壁部と前記車外側壁部との一方から他方に延びるように配設した接結部により、構成されていることを特徴とする請求項１乃至請求項３のいずれか１項に記載の頭部保護エアバッグ。 The airbag is formed by bag weaving,
The communication blocking portion is constituted by a connecting portion disposed so as to extend from one of the vehicle inner wall portion and the vehicle outer wall portion to the other so as to be able to break a thread used for bag weaving. The head protection airbag according to any one of claims 1 to 3, wherein the head protection airbag is provided.

前記連通用閉塞部が、破断可能な縫合糸を使用した前記車内側壁部と前記車外側壁部との縫合、若しくは、剥離可能な接着剤を使用した前記車内側壁部と前記車外側壁部との接着、の少なくとも一方を使用した結合構造として、構成されていることを特徴とする請求項１乃至請求項３のいずれか１項に記載の頭部保護エアバッグ。 The communication blocking portion is formed by stitching the vehicle inner wall portion and the vehicle outer wall portion using a breakable suture, or the vehicle inner wall portion and the vehicle outer wall portion using a peelable adhesive. The head protection airbag according to any one of claims 1 to 3, wherein the head protection airbag is configured as a coupling structure using at least one of the bonding.

前記連通用閉塞部が、前記エアバッグの下縁側からくるんで結束するとともに、前記連通閉塞部の開口時に破断する結束材から構成されていることを特徴とする請求項１若しくは請求項２に記載の頭部保護エアバッグ。 The said closed part for a communication is comprised from the binding material which breaks | wraps from the lower edge side of the said airbag, and breaks at the time of opening of the said communication closed part, The Claim 1 or Claim 2 characterized by the above-mentioned. Head protection airbag.

前記エアバッグが、袋織りにより形成され、
前記排気用閉塞部が、袋織りに使用する糸を破断可能に前記車内側壁部と前記車外側壁部との一方から他方に延びるように配設した接結部により、構成されていることを特徴とする請求項２若しくは請求項３に記載の頭部保護エアバッグ。 The airbag is formed by bag weaving,
The exhaust closing portion is constituted by a connecting portion disposed so as to extend from one of the vehicle inner wall portion and the vehicle outer wall portion to the other so as to be able to break a thread used for bag weaving. The head protection airbag according to claim 2 or 3, wherein the head protection airbag is provided.

前記排気用閉塞部が、破断可能な縫合糸を使用した前記車内側壁部と前記車外側壁部との縫合、若しくは、剥離可能な接着剤を使用した前記車内側壁部と前記車外側壁部との接着、の少なくとも一方を使用した結合構造として、構成されていることを特徴とする請求項２若しくは請求項３に記載の頭部保護エアバッグ。 The exhaust blocking part is a seam between the vehicle inner wall and the vehicle outer wall using a breakable suture, or the vehicle inner wall and the vehicle outer wall using a peelable adhesive. The head protection airbag according to claim 2 or 3, wherein the head protection airbag is configured as a coupling structure using at least one of the above-described adhesion.