JP2001328503A - Head protection air bag device - Google Patents
Head protection air bag deviceInfo
- Publication number
- JP2001328503A JP2001328503A JP2000148727A JP2000148727A JP2001328503A JP 2001328503 A JP2001328503 A JP 2001328503A JP 2000148727 A JP2000148727 A JP 2000148727A JP 2000148727 A JP2000148727 A JP 2000148727A JP 2001328503 A JP2001328503 A JP 2001328503A
- Authority
- JP
- Japan
- Prior art keywords
- area
- head
- head protection
- inflatable
- inflation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Air Bags (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車両に装備される
頭部保護エアバッグ装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head protection airbag device mounted on a vehicle.
【０００２】[0002]
【従来の技術】この種の頭部保護エアバッグ装置は、例
えば特開平１１−１９８７５３号公報に示されていて、
インフレータからガスが供給されることにより車室内の
側部にてエアバッグをカーテン状に膨張展開させて乗員
の頭部を保護するようになっている。上記した公報に示
されているエアバッグにおいては、膨張展開時に乗員の
頭部側方に位置する頭部保護膨張エリアの下端部からド
アベルトライン（ドアの窓開口下縁）より下方位置にま
で延びる延設エリアが設けてあり、ロールオーバー時に
乗員の身体の一部が車外方向へ移動する量を延設エリア
にて抑制するようにしている。2. Description of the Related Art A head protection airbag device of this kind is disclosed in, for example, Japanese Patent Application Laid-Open No. H11-198753.
When the gas is supplied from the inflator, the airbag is inflated and deployed in a curtain shape at the side portion in the vehicle interior to protect the head of the occupant. In the airbag disclosed in the above publication, the lower portion of the head protection inflation area located on the side of the occupant's head during inflation and deployment extends from the lower end to the door belt line (lower edge of the window opening of the door). An extended area is provided, and the amount of movement of a part of the body of the occupant in the outside direction during rollover is suppressed by the extended area.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記した公
報に示されているエアバッグにおいては、延設エリアが
非膨張のままで展開する構成、例えば膨張部を有さない
基布のみから形成されているため、インフレータを大型
化することなく実施することができるものの、ロールオ
ーバー時に乗員の身体の一部が車外方向へ移動する量を
抑制する機能に改善の余地があった。By the way, in the airbag disclosed in the above-mentioned publication, the extended area is deployed without being inflated, for example, the airbag is formed only from the base cloth having no inflated portion. Therefore, although it can be implemented without increasing the size of the inflator, there is room for improvement in the function of suppressing the amount of movement of a part of the occupant's body to the outside of the vehicle during rollover.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記した課題
に対処すべくなされたものであり、インフレータからガ
スが供給されることにより車室内の側部にてエアバッグ
をカーテン状に膨張展開させて乗員の頭部を保護するよ
うにした頭部保護エアバッグ装置において、前記エアバ
ッグが、乗員の頭部側方に位置する厚みの大きい膨張部
を有する頭部保護膨張エリアと、この頭部保護膨張エリ
アの下端部からドアベルトラインの下方位置まで延びる
厚みの小さい膨張部を有する延設膨張エリアとを備えて
いること（請求項１に係る発明）に特徴がある。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem, and inflates and deploys an airbag into a curtain shape at a side portion in a vehicle cabin by supplying gas from an inflator. In the head protection airbag device configured to protect the head of the occupant, the airbag includes a head protection inflation area having a thick inflatable portion located on the side of the occupant's head, And an extended inflatable area having an inflatable section having a small thickness extending from a lower end of the part protection inflatable area to a position below the door belt line (the invention according to claim 1).
【０００５】また、上記した発明の実施に際して、前記
頭部保護膨張エリアが膨張展開した後に、前記延設膨張
エリアが膨張展開するように構成すること（請求項２に
係る発明）が望ましい。この場合において、前記延設膨
張エリアにその膨張部の内圧上昇に伴って切れるティア
シームを設けること（請求項３に係る発明）、または前
記頭部保護膨張エリアを蛇腹折りとし、前記延設膨張エ
リアをロール折りとすること（請求項４に係る発明）も
可能である。また、上記した各場合において、前記延設膨
張エリアの下縁に沿って小径の形状保持用ガス通路を設
けること（請求項５に係る発明）が望ましい。[0005] Further, when the above-mentioned invention is embodied, it is preferable that the extension inflation area be inflated and deployed after the head protection inflation area is inflated and deployed (the invention according to claim 2). In this case, the extension inflatable area may be provided with a tear seam that cuts in accordance with an increase in the internal pressure of the inflatable portion (the invention according to claim 3), or the head protection inflatable area may be a bellows-fold, and Can be roll-folded (the invention according to claim 4). In each case described above, it is desirable to provide a small-diameter shape-holding gas passage along the lower edge of the extended expansion area (the invention according to claim 5).
【０００６】[0006]
【発明の作用・効果】本発明による頭部保護エアバッグ
装置においては、通常時、エアバッグが折り畳まれて収
納されており、車両の側突時等においてエアバッグ内に
インフレータからガスが供給されて、エアバッグが車室
内の側部にてカーテン状に膨張展開する。この際、エア
バッグにおいて、インフレータから供給されるガスによ
り、頭部保護膨張エリアの膨張部が膨張展開して乗員の
頭部側方に位置し、この頭部保護膨張エリアの下端部か
らドアベルトラインの下方位置において延設膨張エリア
の膨張部が膨張展開して延在する。In the head protection airbag device according to the present invention, the airbag is normally folded and housed, and gas is supplied from the inflator into the airbag in the event of a side collision of the vehicle. As a result, the airbag is inflated and deployed in a curtain shape at the side portion in the vehicle cabin. At this time, in the airbag, the gas supplied from the inflator inflates and expands the inflatable portion of the head protection inflatable area and is located on the side of the occupant's head. At a position below the line, the expansion portion of the extension expansion area expands and extends.
【０００７】ところで、本発明（請求項１に係る発明）
においては、延設膨張エリアの膨張部が厚みの小さい膨
張部であってインフレータから供給される少量のガスに
よって膨張展開し、延設膨張エリアの膨張展開状態では
同膨張部により張力が得られてロールオーバー時に乗員
の身体の一部が車外方向へ移動する量を抑制する。した
がって、インフレータを大型化することなく、ロールオ
ーバー時に乗員の身体の一部が車外方向に移動するのを
有効に防止することができる。The present invention (the invention according to claim 1)
In the expansion section, the expansion section is an expansion section having a small thickness, and is expanded and developed by a small amount of gas supplied from the inflator. In the expansion state of the expansion area, tension is obtained by the expansion section. The amount of movement of a part of the occupant's body in the direction outside the vehicle during rollover is suppressed. Therefore, it is possible to effectively prevent a part of the occupant's body from moving outside the vehicle at the time of rollover without increasing the size of the inflator.
【０００８】また、本発明の実施に際して、頭部保護膨
張エリアが膨張展開した後に、延設膨張エリアが膨張展
開するように構成した場合（請求項２に係る発明）にお
いては、側突時の乗員頭部保護とロールオーバー時の身
体部分車外放出防止を含む乗員保護の両性能を高次元で
成立させることが可能である。また、エアバッグ内圧が
上がり過ぎるのを防止することができて、エアバッグの
過圧によるダメージ（気密性の損傷）を減らすことがで
き、エアバッグの内圧保持性能の改善効果を期待するこ
とができる。Further, when the present invention is implemented, in a case where the extended inflatable area is inflated and deployed after the head protection inflatable area is inflated and deployed (the invention according to claim 2), the side collision is prevented. It is possible to achieve both occupant protection performance including protection of the occupant head and prevention of release of the body part from the vehicle during rollover at a high level. In addition, it is possible to prevent the internal pressure of the airbag from rising excessively, reduce damage (damage of airtightness) due to overpressure of the airbag, and expect to improve the internal pressure holding performance of the airbag. it can.
【０００９】この場合において、延設膨張エリアにその
膨張部の内圧上昇に伴って切れるティアシームを設けた
場合（請求項３に係る発明）、または頭部保護膨張エリ
アを蛇腹折りとし、延設膨張エリアをロール折りとした
場合（請求項４に係る発明）には、頭部保護膨張エリア
の膨張展開に比して延設膨張エリアの膨張展開を低コス
トにて的確に遅らせることができ、側突時の乗員頭部保
護とロールオーバー時の身体部分車外放出防止を含む乗
員保護とを安価にしかも適切なタイミングで行うことが
できる。In this case, in the case where the extension inflatable area is provided with a tear seam which cuts in accordance with an increase in the internal pressure of the inflated portion (the invention according to claim 3), or the head protection inflatable area is formed as a bellows fold, and When the area is roll-folded (the invention according to claim 4), the inflation and deployment of the extended inflation area can be accurately delayed at a lower cost than the inflation and deployment of the head protection inflation area. The protection of the occupant head in the event of a collision and the protection of the occupant including the prevention of the release of the body part from the vehicle during the rollover can be performed at low cost and at an appropriate timing.
【００１０】また、本発明の実施に際して、延設膨張エリ
アの下縁に沿って小径の形状保持用ガス通路を設けた場
合（請求項５に係る発明）においては、インフレータか
ら延設膨張エリアの形状保持用ガス通路に供給されるガ
スにより、延設膨張エリアを所定の膨張展開形状にて保
持することが可能であり、ロールオーバー時の身体部分
車外放出防止の性能を向上させることができる。Further, when the present invention is carried out, when a small-diameter shape-retaining gas passage is provided along the lower edge of the extended inflatable area (the invention according to claim 5), the inflator extends from the inflator to the extended inflatable area. By the gas supplied to the shape maintaining gas passage, the extended inflatable area can be held in a predetermined inflated and expanded shape, and the performance of preventing the body part from being released from the vehicle at the time of rollover can be improved.
【００１１】[0011]
【発明の実施の形態】以下に、本発明の一実施形態を図
面に基づいて説明する。図１は本発明の頭部保護エアバ
ッグ装置１０を示していて、この頭部保護エアバッグ装
置１０は、車室内の側部にてカーテン状に膨張展開して
前席乗員Ｈの頭部Ｈｆと後席乗員の頭部(図示省略)を保
護するエアバッグ１１と、このエアバッグ１１にガスを
供給するインフレータ１２を備えている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a head protection airbag device 10 according to the present invention. The head protection airbag device 10 is inflated and deployed in the shape of a curtain at the side in a vehicle cabin, and the head Hf of a front passenger H. And an airbag 11 for protecting the head (not shown) of the rear passenger, and an inflator 12 for supplying gas to the airbag 11.
【００１２】エアバッグ１１は、基布（織物）に気密保
持用のコーティングを施してなるもので、図１の略上半
分で構成される頭部保護膨張エリアＡと、図１の略下半
分で構成される延設膨張エリアＢを備えている。頭部保
護膨張エリアＡは、中央の非膨張部１１ａを挟んで前後
に前席用膨張部１１ｂと後席用膨張部１１ｃを有し、後
方上部にガス導入部１１ｄを有している。また、頭部保
護膨張エリアＡは、前方下部に非膨張部１１ｅを有し、
前方上部に膨張部１１ｆを有していて、上縁部に複数個
の取付片１１ｇを有している。なお、前方上部の膨張部
１１ｆは、フロントピラー２１に対して前席乗員Ｈの頭
部Ｈｆを保護するものであり、前席用膨張部１１ｂの前
方上部からフロントピラー２１の下縁に沿って延設され
ている。The airbag 11 is formed by applying a coating for maintaining airtightness to a base cloth (woven fabric). The airbag 11 includes a head protection inflation area A composed of a substantially upper half of FIG. 1 and a substantially lower half of FIG. Is provided. The head protection inflation area A has a front seat inflation portion 11b and a rear seat inflation portion 11c at the front and back of the central non-inflation portion 11a, and has a gas introduction portion 11d at an upper rear portion. In addition, the head protection expansion area A has a non-expansion portion 11e in the lower front part,
It has an inflatable portion 11f at the upper front, and has a plurality of mounting pieces 11g at the upper edge. The upper front inflatable portion 11f protects the head Hf of the front seat occupant H from the front pillar 21 and extends along the lower edge of the front pillar 21 from the front upper portion of the front seat inflatable portion 11b. It has been extended.
【００１３】前席用膨張部１１ｂと後席用膨張部１１ｃ
は、前席用膨張部１１ｂを例として図３に示したように
厚みの大きい（厚みが１００ｍｍ程度の）幅広の膨張部
であり、膨張展開状態では乗員Ｈの頭部Ｈｆ側方に位置
している。なお、前席用膨張部１１ｂに設けられている
３個のＴ字部（図１参照）は、前席用膨張部１１ｂを複
数の小さな膨張室に区画するための非膨張部である。ま
た、後席用膨張部１１ｃにも、後席用膨張部１１ｃを複
数の小さな膨張室に区画するための非膨張部が設けられ
ている。The front-seat inflatable portion 11b and the rear-seat inflatable portion 11c
Is a wide inflatable portion having a large thickness (about 100 mm in thickness) as shown in FIG. 3 using the front seat inflatable portion 11b as an example, and is located on the side of the head Hf of the occupant H in the inflated and deployed state. ing. The three T-shaped portions (see FIG. 1) provided on the front seat expansion portion 11b are non-expansion portions for dividing the front seat expansion portion 11b into a plurality of small expansion chambers. The rear inflatable portion 11c is also provided with a non-inflatable portion for partitioning the rear inflatable portion 11c into a plurality of small expansion chambers.
【００１４】一方、延設膨張エリアＢは、前席に対応して
上下方向に延びる３個の膨張部１１ｉ，１１ｊ，１１ｋ
を有し、後席に対応して上下方向に延びる膨張部１１ｍ
と傾斜して下方に延びる膨張部１１ｎを有していて、残
部は非膨張部となっている。また、延設膨張エリアＢの
非膨張部には、頭部保護膨張エリアＡが膨張展開した後
に、延設膨張エリアＢが膨張展開するように、各膨張部
１１ｉ，１１ｊ，１１ｋ，１１ｍ，１１ｎの内圧上昇に
伴って切れるティアシームＳ（剪断可能な糸で縫い合わ
せた部位）が６箇所（図１の波状部と、図４及び図５参
照）に設けられている。On the other hand, the extended inflatable area B has three inflatable portions 11i, 11j, 11k extending vertically corresponding to the front seat.
Having an inflatable portion 11m extending vertically corresponding to the rear seat
And an inflatable portion 11n extending downward and inclined, and the remaining portion is a non-expandable portion. The inflatable portions 11i, 11j, 11k, 11m, and 11n are provided in the non-inflatable portion of the extended inflatable area B so that the head inflatable area A is inflated and deployed, and then the extended inflatable area B is inflated and deployed. The tear seam S (the portion sewn with a shearable thread) that is cut with an increase in the internal pressure is provided at six locations (see the wavy portion in FIG. 1 and FIGS. 4 and 5).
【００１５】また、延設膨張エリアＢの下縁には、各膨張
部１１ｉ，１１ｊ，１１ｋ，１１ｍ，１１ｎの下端にそ
れぞれ連通し前後方向に延びる小径の形状保持用ガス通
路１１ｐが設けられている。各膨張部１１ｉ，１１ｊ，
１１ｋ，１１ｍ，１１ｎは、膨張部１１ｊを例として図
３に示したように厚みの小さい（厚みが４０ｍｍ以下
の）幅狭の膨張部であり、膨張展開状態では頭部保護膨
張エリアＡの下端部からドアベルトラインＬ（各ドア２
４，２５の窓開口下縁）の下方位置まで延びている。ま
た、各膨張部１１ｉ，１１ｊ，１１ｋは、上端にて頭部
保護膨張エリアＡにおける前席用膨張部１１ｂの下端に
連通しており、膨張部１１ｎは、上端にて頭部保護膨張
エリアＡにおける後席用膨張部１１ｃの下端に連通して
いる。なお、膨張部１１ｍは、頭部保護膨張エリアＡに
おける中央の非膨張部１１ａを分断して上方に延び、上
端にてガス導入部１１ｄに連通している。A small-diameter shape-retaining gas passage 11p extending in the front-rear direction is provided at the lower edge of the extended expansion area B so as to communicate with the lower end of each of the expansion portions 11i, 11j, 11k, 11m, and 11n. I have. Each of the expansion portions 11i, 11j,
Reference numerals 11k, 11m, and 11n denote small-width (thickness of 40 mm or less) narrow-width inflatable portions as shown in FIG. 3 using the inflatable portion 11j as an example. From the door belt line L (each door 2
4,25 window opening lower edge). The inflatable portions 11i, 11j, and 11k communicate with the lower end of the front seat inflatable portion 11b in the head protection inflatable area A at the upper end, and the inflatable portion 11n has the head protective inflatable area A at the upper end. At the lower end of the rear seat inflatable portion 11c. The inflatable portion 11m extends upward by dividing the central non-inflatable portion 11a in the head protection inflatable area A, and communicates with the gas introduction portion 11d at the upper end.
【００１６】上記構成のエアバッグ１１は、前端部に設
けた取付孔１１ｈにてボルトとナット（共に図示省略）
を用いて車体のフロントピラー２１に組付けられるとと
もに、各取付片１１ｇにてボルトとナット（共に図示省
略）を用いて車体のルーフサイドレール２２に組付けら
れている。また、エアバッグ１１は、図２にて示したよ
うに、折り畳んだ状態にてフロントピラー２１とルーフ
サイドレール２２とクォーターピラー２３に沿って収納
されて、下縁部が弾性変形可能なフロントピラーガーニ
ッシュ（図示省略）と、弾性変形可能なルーフヘッドラ
イニング（図示省略）の周縁部と、弾性変形可能なクォ
ーターピラーガーニッシュ（図示省略）により覆われる
ようになっている。In the airbag 11 having the above-described structure, bolts and nuts (both not shown) are provided in mounting holes 11h provided at the front end.
Are attached to the front pillar 21 of the vehicle body, and are attached to the roof side rails 22 of the vehicle body using bolts and nuts (both not shown) at each mounting piece 11g. The airbag 11 is housed along the front pillar 21, the roof side rail 22 and the quarter pillar 23 in a folded state as shown in FIG. The garnish (not shown), the periphery of an elastically deformable roof head lining (not shown), and an elastically deformable quarter pillar garnish (not shown) are provided.
【００１７】インフレータ１２は、車両の側突時等にガ
スをエアバッグ１１に向けて噴出するものであり、クォ
ーターピラー２３に沿って傾斜して配設されていて、ブ
ラケットとボルト（共に図示省略）を用いてクォーター
ピラー２３に組付けられており、その前端部はエアバッ
グ１１のガス導入部１１ｄ内に気密的に嵌合している。
また、インフレータ１２は、エアバッグ１１におけるガ
ス導入部１１ｄの後端部とともに、クォーターピラーガ
ーニッシュによって覆われるようになっている。The inflator 12 is for injecting gas toward the airbag 11 at the time of a side collision of the vehicle or the like. The inflator 12 is disposed to be inclined along the quarter pillar 23, and includes a bracket and a bolt (both not shown). ) Is attached to the quarter pillar 23, and the front end thereof is airtightly fitted into the gas introduction portion 11 d of the airbag 11.
The inflator 12 is covered with a quarter pillar garnish together with the rear end of the gas introduction section 11d in the airbag 11.
【００１８】上記のように構成した本実施形態の頭部保
護エアバッグ装置１０においては、通常時、エアバッグ
１１が図５に示したように全体を蛇腹折りにて折り畳ま
れた状態で図２に示したように収納されている。このた
め、車両の側突時等においてインフレータ１２からガス
が噴出し、このガスがエアバッグ１１のガス導入部１１
ｄを経て折り畳まれて収納されているエアバッグ１１内
に供給されると、エアバッグ１１がフロントピラーガー
ニッシュとルーフヘッドライニングとクォーターピラー
ガーニッシュの該当部位をそれぞれ車室内に向けて変形
させて下方に展開し、図１に示したように車室内の側部
にてカーテン状に膨張展開する。In the head protection airbag device 10 of the present embodiment configured as described above, the airbag 11 is normally folded in a bellows-folded state as shown in FIG. Are stored as shown in FIG. For this reason, gas is ejected from the inflator 12 at the time of a side collision of the vehicle or the like, and this gas is supplied to the gas introduction portion 11 of the airbag 11.
When the airbag 11 is supplied into the folded and stored airbag 11 through the airbag 11, the airbag 11 deforms the corresponding portions of the front pillar garnish, the roof head lining, and the quarter pillar garnish toward the interior of the vehicle, respectively, so as to be downward. It expands and expands and develops in a curtain shape on the side in the vehicle cabin as shown in FIG.
【００１９】この際、エアバッグ１１において、インフ
レータ１２から供給されるガスにより、図４に示したよ
うに頭部保護膨張エリアＡの前席用膨張部１１ｂと後席
用膨張部１１ｃが膨張展開して乗員の頭部側方に位置す
るとともに前方上部の膨張部１１ｆが膨張展開し（図７
のｔｏ〜ｔ１参照）、その後において延設膨張エリアＢ
における各膨張部１１ｉ，１１ｊ，１１ｋ，１１ｍ，１
１ｎの内圧上昇に伴ってティアシームＳが切れ（図７の
ｔ１時）、頭部保護膨張エリアＡの下端部からドアベル
トラインＬの下方位置において延設膨張エリアＢの各膨
張部１１ｉ，１１ｊ，１１ｋ，１１ｍ，１１ｎが膨張展
開して延在する（図７のｔ２以降）。なお、図７におい
て、エアバッグ内圧は大気圧を基準として図示してい
る。At this time, in the airbag 11, the gas supplied from the inflator 12 causes the front seat inflatable portion 11b and the rear seat inflatable portion 11c of the head protection inflatable area A to inflate and deploy as shown in FIG. As a result, the inflatable portion 11f located on the side of the occupant's head and in the upper front portion expands and deploys (FIG. 7).
To to t1), and then the expanded area B
, Each expansion part 11i, 11j, 11k, 11m, 1
The tear seam S is cut off at the time of the internal pressure rise of 1n (at time t1 in FIG. 7), and each of the inflatable portions 11i, 11j, 11j, 11j, 11j, 11j, 11b of the extended inflatable area B is located below the door belt line L from the lower end of the head protection inflatable area A. 11k, 11m, and 11n expand and expand (after t2 in FIG. 7). In FIG. 7, the airbag internal pressure is shown based on the atmospheric pressure.
【００２０】このときには、ティアシームＳが切れるこ
とにより、図７から明らかなように、エアバッグ容量
（ガス収容可能容積）が増大してエアバッグ内圧が上が
り過ぎるのを防止することができる。このため、基布
（織物）に気密保持用のコーティングを施してなるエア
バッグ１１の過圧によるダメージ（気密性の損傷）を減
らすことができて、エアバッグ１１の内圧保持性能の改
善効果を期待することができる。At this time, when the tear seam S is cut off, as apparent from FIG. 7, it is possible to prevent the airbag capacity (gas accommodating volume) from increasing and the airbag internal pressure from becoming too high. For this reason, damage (airtightness damage) due to overpressure of the airbag 11 in which the base cloth (woven fabric) is coated with airtightness can be reduced, and the effect of improving the internal pressure holding performance of the airbag 11 can be reduced. You can expect.
【００２１】ところで、本実施形態においては、延設膨
張エリアＢの各膨張部１１ｉ，１１ｊ，１１ｋ，１１
ｍ，１１ｎが厚みの小さい膨張部であってインフレータ
１２から供給される少量のガスによって膨張展開し、延
設膨張エリアＢの膨張展開状態では各膨張部１１ｉ，１
１ｊ，１１ｋ，１１ｍ，１１ｎにより張力が得られてロ
ールオーバー時に乗員Ｈの身体の一部（例えば腕等）が
車外方向へ移動する量を抑制する。したがって、インフ
レータ１２を大型化することなく、ロールオーバー時に
乗員Ｈの身体の一部が車外方向に移動するのを有効に防
止することができる。In the present embodiment, each of the expansion portions 11i, 11j, 11k, 11
m and 11n are inflatable portions having a small thickness and are inflated and deployed by a small amount of gas supplied from the inflator 12, and in the inflated and deployed state of the extended inflation area B, each inflatable portion 11i, 1
Tension is obtained by 1j, 11k, 11m, and 11n, and a part of the body (for example, an arm or the like) of the occupant H during rollover is suppressed from moving in a direction outside the vehicle. Therefore, it is possible to effectively prevent a part of the body of the occupant H from moving outside the vehicle at the time of rollover without increasing the size of the inflator 12.
【００２２】また、本実施形態においては、頭部保護膨
張エリアＡが膨張展開した後に、延設膨張エリアＢが膨
張展開するように構成されている（遅延手段が設けられ
ている）ため、側突時の乗員頭部保護とロールオーバー
時の身体部分車外放出防止を含む乗員保護の両性能を高
次元で成立させることが可能である。しかも、上記した
構成（遅延手段）が延設膨張エリアＢにおける各膨張部
１１ｉ，１１ｊ，１１ｋ，１１ｍ，１１ｎの内圧上昇に
伴って切れるティアシームＳであるため、頭部保護膨張
エリアＡの膨張展開に比して延設膨張エリアＢの膨張展
開を低コストにて的確に遅らせることができ、側突時の
乗員頭部保護とロールオーバー時の身体部分車外放出防
止を含む乗員保護とを安価にしかも適切なタイミングで
行うことができる。Further, in this embodiment, since the extension inflation area B is inflated and deployed after the head protection inflation area A is inflated and deployed (the delay means is provided), It is possible to achieve both performances of protection of the occupant at the time of collision and protection of the occupant including prevention of release of the body part from the vehicle at the time of rollover at a high level. In addition, since the above-described configuration (delay means) is the tear seam S that is cut off with an increase in the internal pressure of each of the inflation portions 11i, 11j, 11k, 11m, and 11n in the extension inflation area B, the inflation and deployment of the head protection inflation area A The inflation and deployment of the extended inflation area B can be accurately delayed at a low cost, and the protection of the occupant's head in the event of a side collision and the protection of the occupant including the release of the body part from the vehicle during a rollover can be inexpensively performed. Moreover, it can be performed at an appropriate timing.
【００２３】また、本実施形態においては、延設膨張エリ
アＢの下縁に沿って小径の形状保持用ガス通路１１ｐを
設けたため、インフレータ１２から形状保持用ガス通路
１１ｐに供給されるガスにより、延設膨張エリアＢを所
定の膨張展開形状にて保持することが可能であり、ロー
ルオーバー時の身体部分車外放出防止の性能を向上させ
ることができる。In the present embodiment, the small-diameter shape-holding gas passage 11p is provided along the lower edge of the extended expansion area B, so that the gas supplied from the inflator 12 to the shape-holding gas passage 11p allows The extended inflatable area B can be held in a predetermined inflated and deployed shape, and the performance of preventing the body part from being released from the vehicle at the time of rollover can be improved.
【００２４】上記実施形態においては、エアバッグ１１
の全体を図５に示したように蛇腹折りとした上で延設膨
張エリアＢにティアシームＳを設けて、頭部保護膨張エ
リアＡが膨張展開した後に、延設膨張エリアＢが膨張展
開するように構成したが、図６に示したように、頭部保
護膨張エリアＡを蛇腹折りとし、延設膨張エリアＢをロ
ール折り（膨張展開し難い折り方）として、頭部保護膨
張エリアＡが膨張展開した後に、延設膨張エリアＢが膨
張展開するように構成することも可能である。In the above embodiment, the airbag 11
5 is provided with a tear seam S in the extended inflatable area B after the bellows-folding as shown in FIG. 5 so that the extended inflatable area B expands and expands after the head protection inflatable area A expands and expands. However, as shown in FIG. 6, the head protection expansion area A is a bellows-shaped fold, and the extended expansion area B is roll-folded (a method of folding that is difficult to expand and deploy). It is also possible to configure so that the extended inflation area B is inflated and deployed after being deployed.
【００２５】また、上記実施形態においては、頭部保護
膨張エリアＡの前席用膨張部１１ｂに延設膨張エリアＢ
の各膨張部１１ｉ，１１ｊ，１１ｋを連通接続するとと
もに、頭部保護膨張エリアＡの後席用膨張部１１ｃに延
設膨張エリアＢの膨張部１１ｎを連通接続して実施した
が、これら各連通接続を遮断して実施することも可能で
ある。この場合には、ガス導入部１１ｄから延設膨張エ
リアＢの膨張部１１ｍと形状保持用ガス通路１１ｐを通
して延設膨張エリアＢの各膨張部１１ｉ，１１ｊ，１１
ｋ，１１ｎにガスが供給される。In the above-described embodiment, the front inflatable portion 11b of the head protection inflatable area A is extended to the inflatable area B.
The expansion portions 11i, 11j, and 11k are connected to each other, and the expansion portion 11n of the extended expansion area B is connected to the rear-seat expansion portion 11c of the head protection expansion area A. It is also possible to cut off the connection. In this case, each of the inflatable portions 11i, 11j, 11 of the extended inflatable area B from the gas introduction portion 11d through the inflatable portion 11m of the extended inflatable area B and the shape maintaining gas passage 11p.
Gas is supplied to k and 11n.
【図１】 本発明による頭部保護エアバッグ装置の一実
施形態を示した図であり、エアバッグの膨張展開状態に
おける側面図である。FIG. 1 is a view showing one embodiment of a head protection airbag device according to the present invention, and is a side view in an inflated and deployed state of an airbag.
【図２】 図１に示した実施形態のエアバッグが収納さ
れた状態の側面図である。FIG. 2 is a side view showing a state where the airbag of the embodiment shown in FIG. 1 is stored.
【図３】 図１の３−３線に沿ったエアバッグの断面図
である。FIG. 3 is a cross-sectional view of the airbag taken along line 3-3 in FIG.
【図４】 図３に示したエアバッグの延設膨張エリアが
膨張展開を開始する直前の断面図である。4 is a sectional view of the airbag shown in FIG. 3 immediately before the extended inflation area starts inflation and deployment.
【図５】 図２の５−５線に沿ったエアバッグの拡大断
面図である。FIG. 5 is an enlarged sectional view of the airbag taken along line 5-5 in FIG. 2;
【図６】 エアバッグの延設膨張エリアをロール折りと
した場合の図５相当の拡大断面図である。FIG. 6 is an enlarged sectional view corresponding to FIG. 5 in a case where an extended inflation area of the airbag is roll-folded.
【図７】 図１に示した実施形態のエアバッグが膨張展
開する際のエアバッグ内圧の変化とエアバッグ容量の変
化を示すグラフである。FIG. 7 is a graph showing a change in airbag internal pressure and a change in airbag capacity when the airbag of the embodiment shown in FIG. 1 is inflated and deployed.
１０…頭部保護エアバッグ装置、１１…エアバッグ、Ａ
…頭部保護膨張エリア、Ｂ…延設膨張エリア、１１ａ…
中央非膨張部、１１ｂ…前席用膨張部（頭部保護膨張エ
リアの厚みの大きい膨張部）、１１ｃ…後席用膨張部
（頭部保護膨張エリアの厚みの大きい膨張部）、１１ｄ
…ガス導入部、１１ｅ…前方非膨張部、１１ｇ…取付
片、１１ｉ，１１ｊ，１１ｋ，１１ｍ，１１ｎ…膨張部
（延設膨張エリアの厚みの小さい膨張部）、１１ｐ…小
径の形状保持用ガス通路、Ｓ…ティアシーム、Ｈ…前席
乗員、Ｈｆ…前席乗員の頭部、１２…インフレータ、２
１…フロントピラー、２２…ルーフサイドレール、２３
…クォーターピラー、２４，２５…ドア、Ｌ…ドアベル
トライン。10 ... Head protection airbag device, 11 ... Airbag, A
... Head protection expansion area, B ... Extension expansion area, 11a ...
Central non-expandable portion, 11b: front seat inflatable portion (expandable portion with large head protection inflatable area), 11c: rear seat inflatable portion (thick inflatable head protective inflatable area), 11d
... gas introduction part, 11e ... front non-inflation part, 11g ... mounting piece, 11i, 11j, 11k, 11m, 11n ... expansion part (expansion part with a small thickness of the extension expansion area), 11p ... small-diameter shape holding gas. Aisle, S: tear seam, H: front seat occupant, Hf: head of front seat occupant, 12: inflator, 2
1: Front pillar, 22: Roof side rail, 23
... quarter pillar, 24, 25 ... door, L ... door belt line.
Claims (5)
により車室内の側部にてエアバッグをカーテン状に膨張
展開させて乗員の頭部を保護するようにした頭部保護エ
アバッグ装置において、前記エアバッグが、乗員の頭部
側方に位置する厚みの大きい膨張部を有する頭部保護膨
張エリアと、この頭部保護膨張エリアの下端部からドア
ベルトラインの下方位置まで延びる厚みの小さい膨張部
を有する延設膨張エリアとを備えていることを特徴とす
る頭部保護エアバッグ装置。1. A head protection airbag device in which a gas is supplied from an inflator to inflate and deploy an airbag in a curtain shape at a side portion of a vehicle interior to protect a head of an occupant. A head protection inflatable area in which the airbag has a thick inflatable part located on the side of the occupant's head, and a thin inflatable part extending from a lower end of the head protective inflatable area to a position below the door belt line; A head protection airbag device, comprising:
置において、前記頭部保護膨張エリアが膨張展開した後
に、前記延設膨張エリアが膨張展開するように構成した
ことを特徴とする頭部保護エアバッグ装置。2. The head protection airbag device according to claim 1, wherein the extension inflation area is inflated and deployed after the head protection inflation area is inflated and deployed. Protective airbag device.
置において、前記延設膨張エリアにその膨張部の内圧上
昇に伴って切れるティアシームを設けたことを特徴とす
る頭部保護エアバッグ装置。3. The head protection airbag device according to claim 2, wherein a tear seam is provided in the extension inflation area in accordance with an increase in the internal pressure of the inflation portion. .
置において、前記頭部保護膨張エリアを蛇腹折りとし、前
記延設膨張エリアをロール折りとしたことを特徴とする
頭部保護エアバッグ装置。4. The head protection airbag device according to claim 2, wherein the head protection inflatable area is bellows-folded, and the extended inflatable area is roll-folded. apparatus.
保護エアバッグ装置において、前記延設膨張エリアの下
縁に沿って小径の形状保持用ガス通路を設けたことを特
徴とする頭部保護エアバッグ装置。5. The head protecting airbag device according to claim 1, wherein a small-diameter shape holding gas passage is provided along a lower edge of the extended inflatable area. Head protection airbag device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000148727A JP3520836B2 (en) | 2000-05-19 | 2000-05-19 | Head protection airbag device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000148727A JP3520836B2 (en) | 2000-05-19 | 2000-05-19 | Head protection airbag device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001328503A true JP2001328503A (en) | 2001-11-27 |
| JP3520836B2 JP3520836B2 (en) | 2004-04-19 |
Family
ID=18654703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000148727A Expired - Fee Related JP3520836B2 (en) | 2000-05-19 | 2000-05-19 | Head protection airbag device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3520836B2 (en) |
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