JP2006182329A - Airbag device for vehicle - Google Patents

Airbag device for vehicle Download PDF

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Publication number
JP2006182329A
JP2006182329A JP2004381444A JP2004381444A JP2006182329A JP 2006182329 A JP2006182329 A JP 2006182329A JP 2004381444 A JP2004381444 A JP 2004381444A JP 2004381444 A JP2004381444 A JP 2004381444A JP 2006182329 A JP2006182329 A JP 2006182329A
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airbag
gas
main chamber
inflator
chamber
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JP4519634B2 (en
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Yasuhiro Uchida
康洋 内田
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Nihon Plast Co Ltd
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Nihon Plast Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means
    • B60R2021/2395—Inflatable members characterised by their venting means comprising means to control the venting

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device for a vehicle capable of miniaturizing an inflater and controlling an exhaust hole securely in such a way that the exhaust hole is closed at the initial time of inflation and deployment and the exhaust hole is opened for the first time at the end time. <P>SOLUTION: This airbag device for the vehicle is provided with an airbag 1 forming the outer periphery like a bag by sewing and stored in a vehicle body in a folded-down condition usually and the inflater capable of injecting gas into the airbag 1. The airbag 1 is formed by a main chamber 10 allowing gas from the inflater to flow into and an auxiliary chamber 13 communicated with the main chamber 10 and forming the exhaust hole 8 for exhausting gas from the inflater. A section between the main chamber 10 and the auxiliary chamber 13 is sealed by a means 9 breakable by inflation force of the airbag 1 being fragiler than sewing force of the airbag 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、車両用エアバッグ装置、特にエアバッグの膨張速度を制御することができる車両用エアバッグ装置に関するものである。   The present invention relates to a vehicle airbag device, and more particularly to a vehicle airbag device capable of controlling the inflation speed of an airbag.

車両、例えば自動車の運転席のステアリングホイールや助手席のインストルメントパネル等に設けられたエアバッグ装置は、乗員側の表面基布と車体側の裏面基布の外周縁同士を接合して袋状にしたエアバッグを備えている。このエアバッグは、通常時は折り畳み状態で車体に収納され、衝突時にインフレータからガスを噴射することにより乗員側に膨張させて、乗員を保護するようになっている。   An airbag device provided in a steering wheel of a driver seat of a vehicle, for example, an automobile driver's seat or an instrument panel of a passenger seat, is formed in a bag shape by joining the outer peripheral edges of a passenger side surface base fabric and a vehicle body side rear surface base fabric. It has an air bag. The airbag is normally stored in the vehicle body in a folded state, and is inflated to the occupant side by injecting gas from the inflator at the time of a collision, thereby protecting the occupant.

エアバッグには、乗員を受け止める際の圧抜き等のため、該ガスを排出する排気孔が形成されてなる。該排気孔は、複数のスリットを断続的に線状に配設して構成したスリット群により形成され、エアバッグ内への膨張用ガスの流入時における内圧の上昇に伴ってスリット間の破断予定部を破断させて、スリット群の配設位置に、膨張用ガスの排気が可能なベントホールが形成される（例えば、特許文献１参照）。
特開２００３−２００８０３号公報 The air bag is formed with an exhaust hole for discharging the gas for pressure release when the occupant is received. The exhaust hole is formed by a slit group configured by disposing a plurality of slits intermittently in a linear shape, and is scheduled to break between the slits as the internal pressure rises when the inflation gas flows into the airbag The vent hole is formed so that the expansion gas can be exhausted at the position where the slit group is disposed (see, for example, Patent Document 1).
JP 2003-200803 A

しかしながら、このような従来の技術にあっては、所定長さのスリットがエアバッグの内圧が高まるに従いナツメのような形に変形し、エアバッグの膨張展開当初から排気能力を有する。しかも、エアバッグの最大膨張展開時のスリットの開口面積も膨張展開当初とさほど変わらないので、膨張展開初期と終期とで排気能力に実質的な差が生ぜず、高速な膨張が出来にくく、インフレータの容量を大型化する必要がある。また、基布の伸びや破断によりスリットの大きさが変化するので、スリット群の破断のタイミングがねらい通りになりずらい。   However, in such a conventional technique, the slit having a predetermined length is deformed into a shape like a jug as the internal pressure of the airbag increases, and has an exhaust capability from the beginning of the inflation and deployment of the airbag. Moreover, the opening area of the slit at the time of maximum inflation and deployment of the airbag is not so different from that at the beginning of inflation, so there is no substantial difference in exhaust capacity between the beginning and end of inflation and deployment, making it difficult to inflate at high speed. It is necessary to increase the capacity. Moreover, since the size of the slit changes due to the elongation or breakage of the base fabric, the break timing of the slit group is difficult to follow.

本発明は、このような従来の技術に着目してなされたものであり、インフレータの小型化を図ると共に膨張展開初期時には排気孔が閉成し終期に始めて排気孔を開成可能なる様に排気孔制御が確実にできる車両用エアバッグ装置を提供するものである。   The present invention has been made by paying attention to such a conventional technique, and is intended to reduce the size of the inflator and to close the exhaust hole at the initial stage of expansion and expansion, and to open the exhaust hole only at the end. The present invention provides a vehicle airbag device that can be reliably controlled.

請求項１記載の発明は、外周を縫製により袋状に形成すると共に通常時折り畳み状態で車体に収納されるエアバッグと、該エアバッグ内部にガスを噴出可能なるインフレータとを備え、インフレータから噴射するガスによりエアバッグを膨張展開させ得る車両用エアバッグ装置であって、前記エアバッグは、インフレータよりのガスが流入可能なる主室と、主室に連通され且つインフレータよりのガスが排気可能なる排気孔が形成されてなる副室とより形成され、前記主室と副室との間には、前記エアバッグの縫製力より脆弱で前記エアバッグの膨張力により破断可能なる手段により密封してなることを特徴とする。   The invention according to claim 1 includes an airbag whose outer periphery is formed into a bag shape by sewing and is stored in the vehicle body in a normally folded state, and an inflator capable of injecting gas into the airbag, and is injected from the inflator A vehicle airbag device capable of inflating and deploying an airbag with a gas to be discharged, the airbag being in communication with the main chamber through which gas from the inflator can flow, and exhausting gas from the inflator It is formed by a sub-chamber formed with an exhaust hole, and the main chamber and the sub-chamber are sealed by means that are weaker than the sewing force of the airbag and can be broken by the inflating force of the airbag. It is characterized by becoming.

請求項２記載の発明は、外周を縫製により袋状に形成すると共に通常時折り畳み状態で車体に収納されるエアバッグと、該エアバッグ内部にガスを噴出可能なるインフレータとを備え、インフレータから噴射するガスによりエアバッグを膨張展開させ得る車両用エアバッグ装置であって、前記エアバッグは、インフレータよりのガスが流入可能なる主室と、主室に連通され且つインフレータよりのガスが排気可能なる排気孔が形成されてなる副室とより形成され、前記エアバッグの副室は、予め主室側に内挿されてなると共に前記エアバッグの縫製力より脆弱で前記エアバッグの膨張力により破断可能なる手段により密封してなり、前記エアバッグの主室の膨張により、前記エアバッグの副室が迫り出され可能なることを特徴とする。   According to a second aspect of the present invention, there is provided an airbag having an outer periphery formed into a bag shape by sewing and accommodated in a vehicle body in a normally folded state, and an inflator capable of injecting gas into the airbag. A vehicle airbag device capable of inflating and deploying an airbag with a gas to be discharged, the airbag being in communication with the main chamber through which gas from the inflator can flow, and exhausting gas from the inflator The auxiliary chamber is formed with an exhaust hole, and the auxiliary chamber of the airbag is inserted in the main chamber in advance and is weaker than the sewing force of the airbag and is broken by the expansion force of the airbag. It is sealed by possible means, and the secondary chamber of the airbag can be pushed out by the expansion of the main chamber of the airbag.

請求項３記載の発明は、請求項１又は請求項２記載の車両用エアバッグ装置であって、前記脆弱な手段は、接着剤よりなることを特徴とする。   A third aspect of the invention is the vehicle airbag device according to the first or second aspect, wherein the fragile means is made of an adhesive.

請求項１記載の発明によれば、エアバッグは、インフレータよりのガスが流入可能なる主室と、主室に連通され且つインフレータよりのガスが排気可能なる排気孔が形成されてなる副室とより形成されてなり、エアバッグの主室と副室との間には、前記エアバッグの縫製力より脆弱で前記エアバッグの膨張力により破断可能なる手段により密封してなるため、インフレータから噴射されたガスにより折りたたまれているエアバッグの主室のみが膨張展開を始める初期時には、副室は閉鎖されてなるので、排気孔も閉成されてなり、小型のインフレータでも急速にエアバッグの膨張展開が可能となる。従って、原価が低減でき、インフレータの質量、体積が低減できる。また、エアバッグの膨張終期に始めて副室が主室と連通し、しかも排気孔が開成するので、急速なエアバッグの膨張と、かかる排気孔の形成制御が確実にできる。   According to the first aspect of the present invention, the airbag includes a main chamber in which gas from the inflator can flow, and a sub chamber formed with an exhaust hole communicating with the main chamber and capable of exhausting gas from the inflator. Formed between the main chamber and the sub chamber of the airbag, and is sealed by a means that is weaker than the sewing force of the airbag and can be broken by the expansion force of the airbag. In the initial stage, only the main chamber of the airbag that is folded by the gas that is folded begins to inflate and deploy, so the subchamber is closed, so the exhaust hole is also closed, and even a small inflator rapidly expands the airbag. Deployment is possible. Therefore, the cost can be reduced and the mass and volume of the inflator can be reduced. In addition, since the sub chamber communicates with the main chamber at the end of the inflation of the airbag and the exhaust hole is opened, rapid inflation of the airbag and formation control of the exhaust hole can be ensured.

請求項２記載の発明によれば、エアバッグは、インフレータよりのガスが流入可能なる主室と、主室に連通され且つインフレータよりのガスが排気可能なる排気孔が形成されてなる副室とより形成され、前記エアバッグの副室は、予め主室側に内挿されてなると共に前記エアバッグの縫製力より脆弱で前記エアバッグの膨張力により破断可能なる手段により密封してなり、前記エアバッグの主室の膨張により、前記エアバッグの副室が迫り出され可能なるため、インフレータから噴射されたガスにより折りたたまれているエアバッグの主室のみが膨張展開を始める初期時には、副室は閉鎖されてなるので、排気孔も閉成されてなり、小型のインフレータでも急速にエアバッグの膨張展開が可能となる。従って、原価が低減でき、インフレータの質量、体積が低減できる。また、エアバッグの膨張終期に始めて副室を主室側に内挿保持する手段が破断することによって、副室が主室と連通し、しかも迫り出された副室により排気孔が開成するので、急速なエアバッグの膨張と、かかる排気孔の形成制御が確実にできる。   According to the second aspect of the present invention, the airbag includes a main chamber in which gas from the inflator can flow, and a sub chamber in which an exhaust hole that communicates with the main chamber and allows gas from the inflator to be exhausted is formed. The sub-chamber of the airbag is inserted in the main chamber in advance and sealed by means that is weaker than the sewing force of the airbag and can be broken by the inflation force of the airbag, Since the sub chamber of the airbag can be pushed out by the expansion of the main chamber of the airbag, only the main chamber of the airbag folded by the gas injected from the inflator begins to expand and deploy at the initial stage. Since the air bag is closed, the exhaust hole is also closed, and the airbag can be rapidly inflated and deployed even with a small inflator. Therefore, the cost can be reduced and the mass and volume of the inflator can be reduced. In addition, since the means for interpolating and holding the sub chamber on the main chamber side is broken only at the end of the inflation of the airbag, the sub chamber communicates with the main chamber, and the exhaust chamber is opened by the sub chamber that has been pushed out. Thus, rapid inflation of the airbag and formation control of the exhaust holes can be ensured.

請求項３記載の発明によれば、脆弱な手段は接着剤よりなるため、エアバッグを構成する表面基布及び裏面基布に縫製用の糸の通る孔が不要となり、両基布を傷めないことになる。   According to the invention described in claim 3, since the weak means is made of an adhesive, holes for passing sewing threads are not required in the front and back base fabrics constituting the airbag, and both base fabrics are not damaged. It will be.

インフレータの小型化を図ると共に膨張展開初期時には排気孔が閉成し終期に始めて排気孔を開成可能なる様に排気孔制御が確実にできる車両用エアバッグ装置を提供するという目的を、外周を縫製により袋状に形成すると共に通常時折り畳み状態で車体に収納されるエアバッグと、該エアバッグ内部にガスを噴出可能なるインフレータとを備え、インフレータから噴射するガスによりエアバッグを膨張展開させ得る車両用エアバッグ装置であって、前記エアバッグは、インフレータよりのガスが流入可能なる主室と、主室に連通され且つインフレータよりのガスが排気可能なる排気孔が形成されてなる副室とより形成され、前記主室と副室との間には、前記エアバッグの縫製力より脆弱で前記エアバッグの膨張力により破断可能なる手段により密封してなることで、実現した。以下、本発明の実施例を図面に基づいて説明する。尚、各実施例において共通する部分には同一の符号を付し、重複する説明は省略する。   The aim is to provide a vehicle airbag device that can reliably control the exhaust hole so that the exhaust hole is closed at the initial stage of inflation and deployment, and the exhaust hole can be opened only at the end, in order to reduce the size of the inflator. Vehicle that is formed in a bag shape and is accommodated in the vehicle body in a normally folded state, and an inflator capable of injecting gas into the airbag, and the airbag can be inflated and deployed by the gas injected from the inflator The airbag includes a main chamber through which gas from the inflator can flow, and a sub chamber that is communicated with the main chamber and has an exhaust hole through which the gas from the inflator can be exhausted. Formed between the main chamber and the sub-chamber, which is weaker than the sewing force of the airbag and can be broken by the inflation force of the airbag. Ri by becoming sealed, was realized. Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the part which is common in each Example, and the overlapping description is abbreviate | omitted.

図１〜図３は、本発明の第１実施例を示す図である。この実施例のエアバッグＭは、運転席側のステアリングホイール（図示せず）の中央部に設けられ、エアバッグ１とインフレータ２とより構成されている。   1 to 3 are views showing a first embodiment of the present invention. The airbag M of this embodiment is provided at the center of a steering wheel (not shown) on the driver's seat side, and includes an airbag 1 and an inflator 2.

エアバッグ１は、乗員側の表面基布６と、車体側の裏面基布５とから袋状に構成されていて、通常時は、所定の折りたたみ方法により折り畳み状態で車体、例えばステアリングホイール内に収納されている。表面基布６と裏面基布５の外周縁同士は、外側に向けた状態で、縫製部７により接合され、全体として袋形状をしている。裏面基布５には排気孔８が形成されている。   The airbag 1 is formed into a bag shape from a front surface base fabric 6 on the occupant side and a back surface base fabric 5 on the vehicle body side, and is normally folded into a vehicle body, for example, a steering wheel by a predetermined folding method. It is stored. The outer peripheral edges of the front surface base fabric 6 and the back surface base fabric 5 are joined to each other by the sewing portion 7 in a state of facing outward, and form a bag shape as a whole. Exhaust holes 8 are formed in the back base fabric 5.

円筒形状のインフレータ２は、エアバッグ１の裏面基布５の中央に形成されている挿入孔１１に位置しており、インフレータ２のブラケット３に設けられたボルト（図示せず）により、挿入孔１１の周辺に形成された複数の保持孔１２により、ステアリングホイール内に形成された収納ケースの底面部４に結合されている。符号２ａは、該インフレータ２に形成したガス噴出口である。   The cylindrical inflator 2 is located in the insertion hole 11 formed in the center of the back base fabric 5 of the airbag 1, and the insertion hole is inserted by a bolt (not shown) provided in the bracket 3 of the inflator 2. 11 is coupled to the bottom surface portion 4 of the storage case formed in the steering wheel by a plurality of holding holes 12 formed in the periphery of the steering wheel 11. Reference numeral 2 a is a gas outlet formed in the inflator 2.

エアバッグ１は、図１に示す膨張時には一つの空間１０となることにより前記排気孔８からガスＧが排気可能であるが、図３に示す膨張以前の状態では、前記挿入孔１１に連通した主室１０（空間１０と符号の重複ではない）と、排気孔８に連通した副室１３との間が、前記エアバッグ１の縫製部７による縫製力より脆弱な前記エアバッグ１の膨張力が４．７kgf／cm2の段階で破断可能なる接着手段９により密封してなることにより、ガスＧが確実に流通できない状態に閉じられている。 When the airbag 1 is inflated as shown in FIG. 1, the gas G can be exhausted from the exhaust hole 8 by forming a single space 10. However, in the state before the inflation shown in FIG. The expansion force of the airbag 1 is weaker than the sewing force of the sewing portion 7 of the airbag 1 between the main chamber 10 (not overlapping with the space 10) and the sub chamber 13 communicating with the exhaust hole 8. Is sealed by the adhesive means 9 that can be broken at a stage of 4.7 kgf / cm 2 , so that the gas G cannot be reliably circulated.

該接着手段９は、前記主室１０の表面基布６及び裏面基布５それぞれの外縁から図２に示すように延設されてなる副室１３と、主室１０との境となる位置、つまり、エアバッグ１が最も膨張した時に最も力の加わる位置に設けられる。接着手段９は、熱硬化型シリコーン系の接着剤で、乳白色半透明であり、切断時の伸びは３００％、引っ張り強さは５．０ＭＰａであるが、これに限定されるものではない。   The bonding means 9 is located at the boundary between the main chamber 10 and the sub chamber 13 extending from the outer edges of the front surface fabric 6 and the back surface fabric 5 of the main chamber 10 as shown in FIG. That is, the airbag 1 is provided at a position where the force is most applied when the airbag 1 is most inflated. The bonding means 9 is a thermosetting silicone adhesive, is milky white translucent, has an elongation at the time of cutting of 300%, and a tensile strength of 5.0 MPa, but is not limited thereto.

このような構造のエアバッグ１は、通常時は折り畳み状態で、図示せぬステアリングホイール内に収納されている。そして、衝突時等急制動を検知するなどをした時には、インフレータ２のガス噴射口２ａから高温高圧のガスＧが噴射される。噴射されたガスＧは、主室１０の裏面基布５の内面から表面基布６側へ流れ、表面基布６の中央に集中した後に、主室１０全体に急速に充満して、主室１０をまず膨張させる。   The airbag 1 having such a structure is normally folded and accommodated in a steering wheel (not shown). When a sudden braking such as a collision is detected, a high-temperature and high-pressure gas G is injected from the gas injection port 2a of the inflator 2. The injected gas G flows from the inner surface of the back surface base fabric 5 of the main chamber 10 to the front surface base fabric 6 side, concentrates on the center of the front surface base fabric 6, and then rapidly fills the main chamber 10 as a whole. 10 is first inflated.

この後、主室１０に充満したガスＧによる張力により、接着手段９に圧力が加わり、４．７kgf／cm2を越えた段階で該接着手段９が破断し、主室１０内に充満したガスＧは副室１３に流れ込むことができる。該副室１３内に流れ込んだガスＧは、排気孔８より外部に排気され、エアバッグ１の膨張力が一旦弱め、乗員をソフトに受け止めることが可能となる。こうして、主室１０と副室１３とが一つの空間１０となって、図１に示す状態となる。 Thereafter, pressure is applied to the bonding means 9 by the tension of the gas G filled in the main chamber 10, and the bonding means 9 breaks when the pressure exceeds 4.7 kgf / cm 2 , and the gas filled in the main chamber 10 G can flow into the subchamber 13. The gas G that has flowed into the sub chamber 13 is exhausted to the outside through the exhaust hole 8, and the inflation force of the airbag 1 is once weakened so that the occupant can be softly received. In this way, the main chamber 10 and the sub chamber 13 become one space 10, which is in the state shown in FIG.

該接着手段９の条件は、接着手段９が破断する前に縫製部７が切断してはならないことにあり、縫製部７の糸が切れるのではなく、エアバッグ１を構成する表面基布６と裏面基布５とが剥離することにある。   The condition of the bonding means 9 is that the sewing part 7 must not be cut before the bonding means 9 breaks, and the thread of the sewing part 7 is not cut, but the surface base cloth 6 constituting the airbag 1 is not broken. And the back base fabric 5 are peeled off.

従って、この実施例によれば、エアバッグ１の主室１０と副室１３との間には、前記エアバッグ１の縫製力より脆弱で前記エアバッグ１の膨張力により破断可能なる手段９により密封してなるため、インフレータ２のガス噴射口２ａから噴射されたガスＧにより折りたたまれているエアバッグ１が膨張展開を始める初期時には、副室１３は主室１０に隔離されているので、副室１３に配設されてなる排気孔８が閉成してなる。つまり、エアバッグ１、なかんずく主室１０は急速に膨張展開が可能となる。また、副室１３の排気孔８が開成されるのは、密封してなる手段９が破断することによるので、かかる排気孔８の形成制御が確実にできる。   Therefore, according to this embodiment, the means 9 between the main chamber 10 and the sub chamber 13 of the airbag 1 is weaker than the sewing force of the airbag 1 and can be broken by the expansion force of the airbag 1. Since the secondary chamber 13 is isolated from the main chamber 10 at the initial stage when the airbag 1 folded by the gas G injected from the gas injection port 2a of the inflator 2 is inflated and deployed, the secondary chamber 13 is isolated from the main chamber 10. The exhaust hole 8 provided in the chamber 13 is closed. That is, the airbag 1 and especially the main chamber 10 can be rapidly inflated and deployed. Further, the exhaust hole 8 of the sub chamber 13 is opened because the sealing means 9 is broken, so that the formation control of the exhaust hole 8 can be reliably performed.

加えて、脆弱な手段９は接着剤よりなるため、エアバッグ１を構成する表面基布６及び裏面基布５に縫製用の糸の通る孔が不要となり、両基布６，５を傷めないことになる。   In addition, since the fragile means 9 is made of an adhesive, holes for passing sewing threads are not necessary in the front surface base fabric 6 and the back surface base fabric 5 constituting the airbag 1, and the base fabrics 6 and 5 are not damaged. It will be.

図４乃至図７は、本発明の第２実施例を示す図である。この実施例に係る主室１０は、先の実施例同様と同様だが、副室１３は予め主室１０側に内挿されてなると共に前記エアバッグ１の縫製力より脆弱で前記エアバッグ１の膨張力により破断可能なる手段９により密封してなり、前記エアバッグ１の主室１０の膨張により、前記エアバッグ１の副室１３が迫り出されが可能とされている。   4 to 7 are views showing a second embodiment of the present invention. The main chamber 10 according to this embodiment is the same as the previous embodiment, but the sub chamber 13 is inserted in the main chamber 10 side in advance and is weaker than the sewing force of the airbag 1, and It is sealed by means 9 that can be broken by an inflating force, and the sub chamber 13 of the airbag 1 can be pushed out by the expansion of the main chamber 10 of the airbag 1.

即ち、図４及び図５に示すように、主室１０内に副室１３が折り返して入り込み、表面基布６及び裏面基布５の延在部の外面に接着手段９により密封されている状態では、排気孔８は、主室１０に臨む位置に配されているが、排気孔８自体が外部に露出していないので、主室１０内に充満するガスＧは排気できない。   That is, as shown in FIGS. 4 and 5, the sub chamber 13 is folded back into the main chamber 10 and is sealed by the adhesive means 9 on the outer surfaces of the extending portions of the front surface base fabric 6 and the back surface base fabric 5. The exhaust hole 8 is arranged at a position facing the main chamber 10, but the gas G filling the main chamber 10 cannot be exhausted because the exhaust hole 8 itself is not exposed to the outside.

インフレータ２のガス噴射口２ａから高温高圧のガスＧが噴射された時は、主室１０に充満したガスＧによる張力により、接着手段９に圧力が加わり、４．７kgf／cm2を越えた段階で該接着手段９が破断し、主室１０内に充満したガスＧは副室１３を外側に押し出し、迫り出された副室１３は、図７に示すように、主室１０と一体になるので、該副室１３内に流れ込んだガスＧは、排気孔８より外部に排気される。 When high-temperature and high-pressure gas G is injected from the gas injection port 2a of the inflator 2, pressure is applied to the bonding means 9 due to the tension of the gas G filled in the main chamber 10, and the stage exceeds 4.7 kgf / cm 2. Then, the bonding means 9 is broken, and the gas G filled in the main chamber 10 pushes the sub chamber 13 outward, and the sub chamber 13 that has been pushed out is integrated with the main chamber 10 as shown in FIG. Therefore, the gas G flowing into the sub chamber 13 is exhausted to the outside through the exhaust hole 8.

従って、エアバッグ１の副室１３は、予め主室１０側に内挿されてなると共に前記エアバッグ１の縫製部７の縫製力より脆弱で前記エアバッグ１の膨張力により破断可能なる手段９により密封してなり、前記エアバッグ１の主室１０の膨張により、前記エアバッグ１の副室１３が迫り出されるため、インフレータ２のガス噴射口２ａから噴射されたガスＧにより折りたたまれているエアバッグ１が膨張展開を始める初期時には、排気孔８が閉成してなるので、急速に膨張展開が可能となる。また、副室１３が主室１０から迫り出されて排気孔８が開成されるのは、副室１３を主室１０側に内挿保持する接着手段９が破断することによるので、かかる排気孔８の形成制御が確実にできる。   Therefore, the sub chamber 13 of the airbag 1 is inserted in the main chamber 10 side in advance, and is weaker than the sewing force of the sewing portion 7 of the airbag 1 and can be broken by the expansion force of the airbag 1. The sub chamber 13 of the airbag 1 is pushed out by the expansion of the main chamber 10 of the airbag 1 and is folded by the gas G injected from the gas injection port 2a of the inflator 2. Since the exhaust hole 8 is closed at the initial stage when the airbag 1 starts to be inflated and deployed, the airbag 1 can be inflated and deployed rapidly. Further, the reason why the sub chamber 13 is pushed out of the main chamber 10 and the exhaust hole 8 is formed is that the adhering means 9 for interpolating and holding the sub chamber 13 on the main chamber 10 side breaks. 8 can be reliably controlled.

また、エアバッグ１の膨張展開初期には、エアバッグ１の外部に副室１３が突出していないので、膨張展開時にステアリングハンドル等に接触するなど、エアバッグ１の膨張展開への悪影響が生じない。また、第１実施例のように、副室１３が突出していると、折りたたみ時に副室１３の折りたたみの仕方に一工夫が必要であるが、そうしたことが必要なく、簡易な折りたたみで済む。   In addition, since the sub chamber 13 does not protrude outside the airbag 1 at the initial stage of inflation and deployment of the airbag 1, there is no adverse effect on the inflation and deployment of the airbag 1 such as contact with the steering handle during inflation and deployment. . Further, when the sub chamber 13 protrudes as in the first embodiment, it is necessary to devise a way to fold the sub chamber 13 at the time of folding, but this is not necessary, and simple folding is sufficient.

接着手段９の接着剤の量が第１実施例と同じであれば、主室１０から接着手段９に加わる破断力は、該接着手段９に直接加わる第１実施例に対して一旦主室１０の端に加わった圧力が戻ってくる第２実施例の方が少なく、それだけ強度が増すことになる。つまり、換言すると、同じ接着強度を要求していれば、第１実施例よりも第２実施例の方が接着剤の量は少なくて済み、原価がより低減できる。   If the amount of the adhesive in the bonding means 9 is the same as that in the first embodiment, the breaking force applied from the main chamber 10 to the bonding means 9 is once larger than that in the first embodiment applied directly to the bonding means 9. The pressure applied to the end of the second embodiment returns less, and the strength increases accordingly. In other words, if the same adhesive strength is required, the amount of adhesive in the second embodiment is smaller than that in the first embodiment, and the cost can be further reduced.

また、接着手段９の破断は、表面基布６及び裏面基布５の膨張変形力によるのであって、インフレータ２からのガスＧによる流路に対向した位置に接着手段９がないので、熱的影響や機械的影響を抑制できる。主室１０の内圧の上昇により副室１３が外に膨出した後は、接着手段９は外側に残骸が残るもののガス流路には存在せず、ガスＧの流れに悪影響を与えない。従って、排気孔８の全閉から全開への切り換えが円滑であり、所定の時期に全開できるので、特性が安定的に得られる。   Further, the breakage of the bonding means 9 is due to the expansion deformation force of the front surface base cloth 6 and the back surface base cloth 5, and since there is no bonding means 9 at the position facing the flow path by the gas G from the inflator 2, Influence and mechanical influence can be suppressed. After the sub chamber 13 bulges out due to an increase in the internal pressure of the main chamber 10, the adhering means 9 remains on the outside but does not exist in the gas flow path, and does not adversely affect the flow of the gas G. Therefore, the switching of the exhaust hole 8 from fully closed to fully open is smooth and can be fully opened at a predetermined time, so that the characteristics can be stably obtained.

以上の実施例では、エアバッグ１は、ステアリングホイールに設けられる例を説明したが、これに限定されるわけでなく、助手席の前に設けられる助手席用のエアバッグや座席の後側に設けられる後席用のエアバッグに採用しても良い。   In the above embodiment, the airbag 1 is described as being provided on the steering wheel. However, the airbag 1 is not limited to this example. The airbag 1 is provided in front of the passenger seat and on the rear side of the seat. You may employ | adopt for the airbag for rear seats provided.

本発明の第１実施例に係るエアバッグ装置の膨張展開時におけるエアバッグを示す断面図。Sectional drawing which shows the airbag at the time of expansion | deployment of the airbag apparatus which concerns on 1st Example of this invention. 図１のエアバッグの膨張展開前における裏面基布側から示す正面図。The front view shown from the back surface base fabric side before the expansion | deployment deployment of the airbag of FIG. 図２のＳＡ−ＳＡ線にかかる断面図。Sectional drawing concerning the SA-SA line of FIG. 本発明の第２実施例に係る図２相当正面図。FIG. 2 is a front view corresponding to FIG. 2 according to a second embodiment of the present invention. 図４の図３相当断面図。FIG. 5 is a cross-sectional view corresponding to FIG. 3 in FIG. 4. 図４の膨張展開時におけるエアバッグを示す図２相当正面図。The front view equivalent to FIG. 2 which shows the airbag at the time of inflation deployment of FIG. 図６の図３相当断面図。FIG. 7 is a cross-sectional view corresponding to FIG. 3 in FIG. 6.

符号の説明Explanation of symbols

１ エアバッグ
２ インフレータ
２ａ ガス噴出口
５ 裏面基布
６ 表面基布
７ 縫製部
８ 排気孔
９ 接着手段
１０ 主室（空間）
１３ 副室
Ｇ ガス DESCRIPTION OF SYMBOLS 1 Air bag 2 Inflator 2a Gas outlet 5 Back surface base fabric 6 Surface base fabric 7 Sewing part 8 Exhaust hole 9 Adhesion means 10 Main room (space)
13 Sub chamber G gas

Claims (3)

外周を縫製により袋状に形成すると共に通常時折り畳み状態で車体に収納されるエアバッグと、該エアバッグ内部にガスを噴出可能なるインフレータとを備え、インフレータから噴射するガスによりエアバッグを膨張展開させ得る車両用エアバッグ装置であって、
前記エアバッグは、インフレータよりのガスが流入可能なる主室と、主室に連通され且つインフレータよりのガスが排気可能なる排気孔が形成されてなる副室とより形成され、
前記主室と副室との間には、前記エアバッグの縫製力より脆弱で前記エアバッグの膨張力により破断可能なる手段により密封してなることを特徴とする車両用エアバッグ装置。 The airbag has an outer periphery formed into a bag shape by sewing and is stored in the vehicle body in a normally folded state, and an inflator capable of injecting gas into the airbag, and the airbag is inflated and deployed by the gas injected from the inflator A vehicle airbag device capable of being
The airbag is formed by a main chamber through which gas from the inflator can flow, and a sub chamber that is communicated with the main chamber and has an exhaust hole through which gas from the inflator can be exhausted.
The vehicle airbag device is characterized in that the vehicle is sealed between the main chamber and the sub chamber by means that is weaker than the sewing force of the airbag and that can be broken by the inflation force of the airbag. 外周を縫製により袋状に形成すると共に通常時折り畳み状態で車体に収納されるエアバッグと、該エアバッグ内部にガスを噴出可能なるインフレータとを備え、インフレータから噴射するガスによりエアバッグを膨張展開させ得る車両用エアバッグ装置であって、
前記エアバッグは、インフレータよりのガスが流入可能なる主室と、主室に連通され且つインフレータよりのガスが排気可能なる排気孔が形成されてなる副室とより形成され、
前記エアバッグの副室は、予め主室側に内挿されてなると共に前記エアバッグの縫製力より脆弱で前記エアバッグの膨張力により破断可能なる手段により密封してなり、
前記エアバッグの主室の膨張により、前記エアバッグの副室が迫り出され可能なることを特徴とする車両用エアバッグ装置。 The airbag has an outer periphery formed into a bag shape by sewing and is stored in the vehicle body in a normally folded state, and an inflator capable of injecting gas into the airbag, and the airbag is inflated and deployed by the gas injected from the inflator A vehicle airbag device capable of being
The airbag is formed by a main chamber through which gas from the inflator can flow, and a sub chamber that is communicated with the main chamber and has an exhaust hole through which gas from the inflator can be exhausted.
The auxiliary chamber of the airbag is inserted in the main chamber in advance and sealed by means that is more fragile than the sewing force of the airbag and can be broken by the expansion force of the airbag.
A vehicular airbag apparatus characterized in that a sub chamber of the airbag can be pushed out by expansion of the main chamber of the airbag. 請求項１又は請求項２記載の車両用エアバッグ装置であって、
前記脆弱な手段は、接着剤よりなることを特徴とする車両用エアバッグ装置。 The vehicle airbag device according to claim 1 or 2,
The vehicle airbag device according to claim 1, wherein the weak means is made of an adhesive.
JP2004381444A 2004-12-28 2004-12-28 Airbag device for vehicle Expired - Fee Related JP4519634B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008132948A (en) * 2006-11-29 2008-06-12 Toyoda Gosei Co Ltd Airbag device
WO2009019923A1 (en) * 2007-08-08 2009-02-12 Takata Corporation Airbag, and airbag device
EP3235692A1 (en) * 2016-04-21 2017-10-25 Autoliv Development AB Driver airbag and steering wheel unit
JP2019172172A (en) * 2018-03-29 2019-10-10 豊田合成株式会社 Air bag device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0948317A (en) * 1995-08-09 1997-02-18 Tokai Rika Co Ltd Air bag device
JP2001322521A (en) * 2000-05-17 2001-11-20 Toyoda Gosei Co Ltd Air bag for steering wheel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0948317A (en) * 1995-08-09 1997-02-18 Tokai Rika Co Ltd Air bag device
JP2001322521A (en) * 2000-05-17 2001-11-20 Toyoda Gosei Co Ltd Air bag for steering wheel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008132948A (en) * 2006-11-29 2008-06-12 Toyoda Gosei Co Ltd Airbag device
WO2009019923A1 (en) * 2007-08-08 2009-02-12 Takata Corporation Airbag, and airbag device
EP3235692A1 (en) * 2016-04-21 2017-10-25 Autoliv Development AB Driver airbag and steering wheel unit
WO2017182543A1 (en) * 2016-04-21 2017-10-26 Autoliv Development Ab Driver airbag and steering wheel unit
JP2019172172A (en) * 2018-03-29 2019-10-10 豊田合成株式会社 Air bag device

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