JP5852847B2

JP5852847B2 - Airbag device

Info

Publication number: JP5852847B2
Application number: JP2011240851A
Authority: JP
Inventors: 恭平米山; 梅原　寿一; 寿一梅原
Original assignee: Nihon Plast Co Ltd
Current assignee: Nihon Plast Co Ltd
Priority date: 2011-11-02
Filing date: 2011-11-02
Publication date: 2016-02-03
Anticipated expiration: 2031-11-02
Also published as: JP2013095300A

Description

本発明は、自動車等の乗員安全装置に関し、特に、乗員と自動車等の側壁との間に展開して、衝撃を緩和するエアバッグ装置に関するものである。 The present invention relates to an occupant safety device for an automobile or the like, and more particularly to an airbag device that is deployed between an occupant and a side wall of an automobile or the like to alleviate an impact.

自動車の衝突時の衝撃から乗員を保護するエアバッグ装置が、運転席、助手席に着座する乗員の正面に膨らむようにした前方衝突用（フロンタル）エアバッグや、側面衝突や横転の際に乗員の側部に膨らむようにした側方衝突用（ラテラル）エアバッグが、車両に搭載されている。また、コンパクトカー、ミニバン等の後席とバックドアとの間に膨張するリアカーテン型のエアバッグも実用化されている。
サイドエアバッグの従来技術としては、内部テザーを含むサイドエアバッグであって、前記内部テザーが、該エアバッグの２つの離間した領域を相互連結する働きをし、水平断面における前記テザーの両端部間での該エアバッグの外周のまわりの距離が、一方向において他方向においてよりも大きく、前記テザーの長さが、前記短い方の距離よりも小さい、サイドエアバッグ（例えば、特許文献１参照）が存在している。 An airbag device that protects occupants from the impact of a car crash is inflated in front of the occupants seated in the driver's and passenger's seats. A lateral collision (lateral) airbag that inflates to the side of the vehicle is mounted on the vehicle. In addition, a rear curtain type airbag that is inflated between a back door and a back door such as a compact car or a minivan has been put into practical use.
A conventional side airbag includes a side airbag including an internal tether, the internal tether serving to interconnect two spaced regions of the airbag, and both end portions of the tether in a horizontal section. A side airbag (for example, see Patent Document 1) in which a distance between the outer circumferences of the airbag is larger in one direction than in the other direction, and the length of the tether is smaller than the shorter distance. ) Exists.

特表２００７−５１０５８１号公報（特許請求の範囲の欄、発明の詳細な説明の欄、及び図１〜図８を参照）Japanese translation of PCT publication No. 2007-510581 (refer to the claims, detailed description of the invention, and FIGS.

前記従来技術である特許文献１に示されたものは、エアバッグ内部にテザーを設けたサイドエアバッグであり、テザーの作用により、膨張したエアバッグは、シートの乗員と車両の隣接する側面との間にエアバッグの大きな厚さを形成する球状形状を形成するとしている。
しかしながら、前記従来技術では内部をテザーにより引っ張り、形状の変化を生ぜしめることで、エアバッグのフル展開時の張力がバッグ形状を変化させるので、テザーに張力が生じない膨張過程では、狭い箇所を通り前方に膨張する時に幅（厚み）が大きくなる傾向を持ち、より迅速に展開方向に膨らみ進ませることが容易ではない。例えば、大量のガスを瞬時に吹き込んで、より前方に素早く展開させることも可能ではある。しかしながら、急激に吹き込まれる高圧のガスに耐えるように、エアバッグに十分な強度を付与するため、種々の補強により折畳嵩が増加し、エアバッグ装置をコンパクトに収納できなかったり、エアバッグの製造コストが上昇したり、高出力のインフレータを利用する必要があるため、コストが上昇するなど、様々な問題が発生する。
そこで、本発明は、エアバッグ展開初期から狭い領域を容易に通って迅速に膨張可能で、乗員保護のためのクッションストロークを有するエアバッグを提供することを目的としている。 The prior art disclosed in Patent Document 1 is a side airbag in which a tether is provided inside an airbag. The airbag inflated by the action of the tether has a seat occupant and an adjacent side surface of the vehicle. A spherical shape that forms a large thickness of the airbag is formed between them.
However, in the above prior art, by pulling the inside with a tether and causing a change in shape, the tension at the time of full deployment of the airbag changes the bag shape. When expanding forward, the width (thickness) tends to increase, and it is not easy to expand in the deployment direction more quickly. For example, a large amount of gas can be blown in an instant, and it can be quickly deployed forward. However, in order to give the airbag sufficient strength to withstand the high-pressure gas that is blown rapidly, the folding volume increases due to various reinforcements, and the airbag device cannot be stored compactly. Various problems occur, such as an increase in manufacturing cost and a need for using a high-power inflator, resulting in an increase in cost.
Therefore, an object of the present invention is to provide an airbag that can be easily inflated quickly through a narrow region from the initial stage of airbag deployment and has a cushion stroke for occupant protection.

本発明の第１の発明は、請求項１に記載された通りのエアバッグ装置であり、次のようなものである。
膨張用ガスを供給するインフレータと、前記膨張用ガスが吹き込まれて膨張の起点側の基部から展開方向に向かって形成され、展開方向に交差する方向に扁平な主気室と、主気室の展開方向先端側の乗員側の位置に、前記展開方向に交差する方向に並列し、かつ前記主気室の上下方向に渡って形成され、主気室から膨張用ガスの供給を受けて膨張する副気室を有する断面略Ｌ字状をなすエアバッグを備える構成である。 A first aspect of the present invention is an airbag apparatus as set forth in claim 1, which is as follows.
An inflator that supplies an inflation gas, a main air chamber that is formed from the base on the expansion start side toward the deployment direction and is flat in a direction crossing the deployment direction. It is formed at the position on the occupant side at the front end side in the deployment direction, parallel to the direction intersecting the deployment direction , and extending in the vertical direction of the main air chamber, and expands upon receiving supply of inflation gas from the main air chamber It is a structure provided with the airbag which makes a cross-section substantially L shape which has a subair chamber.

本発明の第２の発明は、請求項２に記載された通りのエアバッグ装置であり、次のようなものである。
請求項１に記載の発明に加えて、前記エアバッグの副気室は、前記展開方向に交差する方向に対向する対向パネル部と、対向パネル部の周縁部に一縁部が連結され、主気室に他縁部が連結された側縁パネル部とからなる構成である。 A second aspect of the present invention is an airbag device as described in claim 2, which is as follows.
In addition to the invention according to claim 1, the auxiliary air chamber of the airbag has an opposing panel portion facing in a direction intersecting the deployment direction, and an edge portion connected to a peripheral edge portion of the opposing panel portion. It is the structure which consists of a side edge panel part by which the other edge part was connected with the air chamber.

本発明に係るエアバッグ装置は、上記説明のような構成を有するので、以下に記載する効果を奏する。
（１）本発明のエアバッグ装置は気室毎に展開方向が違っているもので、エアバッグ展開時に迅速に膨張することができるため、車体と乗員までの距離が狭い乗員の側部の好適な保護が可能である。 Since the airbag apparatus according to the present invention has the configuration as described above, the following effects are achieved.
(1) Since the airbag device of the present invention has a different deployment direction for each air chamber and can be quickly inflated when the airbag is deployed, it is suitable for the side portion of the occupant having a small distance between the vehicle body and the occupant. Protection is possible.

本発明の一実施例であるエアバッグ装置の展開時の状態を示す概略要部断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of an essential part showing a state when an airbag apparatus according to an embodiment of the present invention is deployed. 本発明のエアバッグ装置に採用するエアバッグ本体の一実施例を示すもので、（ａ）はエアバッグ全体を示す概略正面図、（ｂ）はＡ−Ａ線断面図、（ｃ）はＢ−Ｂ線断図である。BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows an embodiment of an airbag main body employed in an airbag device of the present invention, wherein (a) is a schematic front view showing the entire airbag, (b) is a cross-sectional view taken along line AA, and (c) is B. FIG. 本発明のエアバッグ装置に採用するエアバッグ本体の構成を示す概略分解斜視図である。It is a general | schematic disassembled perspective view which shows the structure of the airbag main body employ | adopted as the airbag apparatus of this invention. 本発明のエアバッグをインフレータに取り付ける状態を示す概略斜視図である。It is a schematic perspective view which shows the state which attaches the airbag of this invention to an inflator.

膨張用ガスを供給するインフレータと、前記膨張用ガスが吹き込まれて膨張の起点側の基部から展開方向に向かって形成され、展開方向に交差する方向に扁平な主気室と、主気室の展開方向先端側の乗員側の位置に、前記展開方向に交差する方向に並列し、かつ前記主気室の上下方向に渡って形成され、主気室から膨張用ガスの供給を受けて膨張する副気室を有する断面略Ｌ字状をなすエアバッグを備えるエアバッグ装置である。 An inflator that supplies an inflation gas, a main air chamber that is formed from the base on the expansion start side toward the deployment direction and is flat in a direction crossing the deployment direction. It is formed at the position on the occupant side at the front end side in the deployment direction, parallel to the direction intersecting the deployment direction , and extending in the vertical direction of the main air chamber, and expands upon receiving supply of inflation gas from the main air chamber It is an airbag apparatus provided with the airbag which makes a cross-section substantially L shape which has a subair chamber.

本発明のエアバッグ装置を図１〜図４に基づいて説明する。
図面からも理解できるように、本発明のエアバッグ装置は、サイドエアバッグ装置のエアバッグにおいて、膨張するチャンバーである２つの気室１、２を設けるという構造を有している。
前記２つの気室１、２とは、エアバッグ展開時に先ずインフレータ３から噴出されたガスで直接膨張する主気室１と主気室１の車体前側に設定されている通気孔４、５、６（なお、通気孔の数は、車種や設置条件により種々選択することができる。）を通ったガスにより膨張する副気室２である（図１、図２（ａ）参照）。
主気室１は、車両トリム側基布７と乗員側中間基布８から形成され、副気室２は、乗員側中間基布８と対向パネル部９とその間に存在し、両基布を連結する側縁パネル部１０とで構成されている。
主気室１と副気室２の関係としては、副気室２は主気室１の略４分の３以下の大きさで構成している（図１・図３参照）。また、主気室１には、エアバッグ容量を小さく保てるように車両上下方向に、車両左右方向の膨張を規定するテザー１１が設けられている。
エアバッグ展開時には、主気室１は車両前方側に展開し、副気室２は車両左右方向に展開する。このように気室毎に展開方向が違っているのが、本発明の特徴である。
このように、展開方向の違う主気室１と副気室２を備え、また、主気室１の容量とバッグ厚さを抑えることによって、車体と乗員の間の狭い空間であっても、乗員を保護しなければいけない領域に素早く展開することが可能である。 The airbag apparatus of this invention is demonstrated based on FIGS.
As can be understood from the drawings, the airbag device of the present invention has a structure in which two air chambers 1 and 2 that are inflating chambers are provided in the airbag of the side airbag device.
The two air chambers 1 and 2 are a main air chamber 1 that is first inflated directly by gas ejected from the inflator 3 when the airbag is deployed, and vent holes 4, 5 that are set on the vehicle body front side of the main air chamber 1. 6 (note that the number of vent holes can be selected in various ways depending on the vehicle type and installation conditions) is a secondary air chamber 2 that is expanded by the gas that has passed through (see FIGS. 1 and 2A).
The main air chamber 1 is formed of a vehicle trim side base cloth 7 and an occupant side intermediate base cloth 8, and the sub air chamber 2 exists between the occupant side intermediate base cloth 8 and the opposing panel portion 9, and both base cloths are attached. It is comprised with the side edge panel part 10 to connect.
As for the relationship between the main air chamber 1 and the sub air chamber 2, the sub air chamber 2 is configured to have a size of approximately three quarters or less of the main air chamber 1 (see FIGS. 1 and 3). Further, the main air chamber 1 is provided with a tether 11 that regulates inflation in the vehicle left-right direction in the vehicle vertical direction so as to keep the airbag capacity small.
When the airbag is deployed, the main air chamber 1 is deployed on the front side of the vehicle, and the auxiliary air chamber 2 is deployed in the left-right direction of the vehicle. It is a feature of the present invention that the deployment direction is different for each air chamber.
As described above, the main air chamber 1 and the sub air chamber 2 having different deployment directions are provided, and by suppressing the capacity of the main air chamber 1 and the bag thickness, even in a narrow space between the vehicle body and the occupant, It is possible to quickly deploy to areas where passengers must be protected.

ここで、本実施例のエアバッグの製造方法について説明する。
先ず、車両トリム側基布７と乗員側中間基布８の間にテザー１１を縫製部１２、１３で縫製する。縫製部１４で乗員側中間基布８と側縁パネル１０を縫製する。側縁パネル１０は、直線状をなし互いに対向する一対の縦辺１０ａ、１０ｂと、アーチ状をなし互いに対向する一対の横辺１０ｄ、１０ｅを有し、横辺１０ｄ、１０ｅは、縫合しろ１０ｆが、Ｖ字状の切欠きによって複数の短片状に分割されている。シールパッチ１９は、横辺１０ｄ、１０ｅに縫合しろ１０ｆに重ねてあらかじめ縫合してある。縫合しろの不連続部分であるＶ字状の切欠きからガスが洩れないようシールする機能を備える。縫製部１４でシールパッチ１９もともに乗員側中間基布８に縫合される。この縫製部１４を横辺１０ｄ、１０ｅの中間点１０ｇまで形成する。その後、外周の縫製部１５で中間点１０ｇからエアバッグの展開時の前方（車両前方でもある）側の部分の車両トリム側基布７と乗員側中間基布８と側縁基布パネル１０の縦辺１０ａの３枚の基布をまとめて縫合する。横辺１０ｄ、１０ｅの中間点１０ｇより前方の部分については、車両トリム側基布７と乗員側中間基布８と側縁基布パネル１０の縦辺１０ａとともに４枚の基布がまとめて縫合されることになる。この工程によって形成された副気室２側面部と対向パネル部９を縫製部１６で縫製し、副気室２と主気室１を備えたエアバッグができあがる（図１、図２（ａ）、（ｂ）、（ｃ）、図３参照）。
これをエアバッグ装置に設置する際は、図３のように車両トリム側基布７の突片１７に４つの挿通孔１８を設け（なお、挿通孔の数は、車種や設置条件により種々選択することができる。）、図４に示すようにインフレータ３に取り付ける際に、エアバッグを巻き込むようにしてインフレータに取り付けるものである。 Here, the manufacturing method of the airbag of a present Example is demonstrated.
First, the tether 11 is sewn between the vehicle trim side base cloth 7 and the occupant side intermediate base cloth 8 by the sewing parts 12 and 13. The occupant side intermediate base fabric 8 and the side edge panel 10 are sewn at the sewing portion 14. The side edge panel 10 has a pair of vertical sides 10a and 10b that are linear and opposed to each other, and a pair of horizontal sides 10d and 10e that are arched and opposed to each other. However, it is divided into a plurality of short pieces by V-shaped notches. The seal patch 19 is sutured in advance on the side edges 10d and 10e so as to overlap the margin 10f. It has a function of sealing so that gas does not leak from a V-shaped notch that is a discontinuous portion of the stitching margin. Both the sealing patch 19 and the occupant-side intermediate base fabric 8 are stitched together at the sewing portion 14. The sewing portion 14 is formed up to the intermediate point 10g between the horizontal sides 10d and 10e. Thereafter, the vehicle trim side base fabric 7, the occupant side intermediate base fabric 8, and the side edge base fabric panel 10 on the front side (also the front side of the vehicle) when the airbag is deployed from the intermediate point 10g at the sewing portion 15 on the outer periphery. The three base fabrics of the vertical side 10a are stitched together. For the portion ahead of the middle point 10g of the horizontal sides 10d and 10e, four base fabrics are stitched together with the vehicle trim side base fabric 7, the occupant side intermediate base fabric 8, and the vertical side 10a of the side edge base fabric panel 10. Will be. The side surface portion of the auxiliary air chamber 2 and the opposing panel portion 9 formed by this process are sewn by the sewing portion 16, and an air bag including the auxiliary air chamber 2 and the main air chamber 1 is completed (FIGS. 1 and 2A). , (B), (c), see FIG. 3).
When this is installed in the airbag device, four insertion holes 18 are provided in the projecting piece 17 of the vehicle trim side base fabric 7 as shown in FIG. 3 (the number of insertion holes is variously selected depending on the vehicle type and installation conditions). 4) When attaching to the inflator 3 as shown in FIG. 4, the airbag is attached to the inflator so as to be involved.

全ての車種に搭載されるエアバッグ装置に利用することができる。 It can be used for an airbag device mounted on all vehicle types.

１・・・・主気室
２・・・・副気室
３・・・・インフレータ
４・・・・通気孔
５・・・・通気孔
６・・・・通気孔
７・・・・車両トリム側基布
８・・・・乗員側中間基布
９・・・・対向パネル部
１０・・・・側縁パネル部
１０ａ・・・・縦辺
１０ｂ・・・・縦辺
１０ｄ・・・・横辺
１０ｅ・・・・横辺
１０ｆ・・・・縫合しろ
１０ｇ・・・・中間点
１１・・・・テザー
１２・・・・縫製部
１３・・・・縫製部
１４・・・・縫製部
１５・・・・縫製部
１６・・・・縫製部
１７・・・・突片
１８・・・・挿通孔
１９・・・・シールパッチ
1 .... Main air chamber 2 .... Sub air chamber 3 .... Inflator 4 .... Vent hole 5 .... Vent hole 6 .... Vent hole 7 .... Vehicle trim Side base fabric 8 ··· Passenger side intermediate fabric 9 ··· Opposite panel portion 10 ··· Side edge panel portion 10a ··· Vertical side 10b ··· Vertical side 10d ··· Horizontal Side 10e ··· Side 10f ··· Sewing margin 10g ··· Intermediate point 11 ··· Tether 12 ··· Sewing portion 13 ··· Sewing portion 14 ··· Sewing portion 15 ... Sewing part 16 ... Sewing part 17 ... Projection piece 18 ... Insertion hole 19 ... Seal patch

Claims

An inflator that supplies an inflation gas, a main air chamber that is formed from the base on the expansion start side toward the deployment direction and is flat in a direction crossing the deployment direction. It is formed at the position on the occupant side at the front end side in the deployment direction, parallel to the direction intersecting the deployment direction , and extending in the vertical direction of the main air chamber, and expands upon receiving supply of inflation gas from the main air chamber An airbag device comprising an airbag having a substantially L-shaped cross section having a secondary air chamber.

The auxiliary air chamber of the airbag has a counter panel portion facing in a direction intersecting the deployment direction, and a side having one edge connected to the peripheral edge of the counter panel portion and the other edge connected to the main air chamber. The airbag device according to claim 1, comprising an edge panel portion.