JP2011000996A - Airbag device - Google Patents

Airbag device Download PDF

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JP2011000996A
JP2011000996A JP2009146600A JP2009146600A JP2011000996A JP 2011000996 A JP2011000996 A JP 2011000996A JP 2009146600 A JP2009146600 A JP 2009146600A JP 2009146600 A JP2009146600 A JP 2009146600A JP 2011000996 A JP2011000996 A JP 2011000996A
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airbag
retainer
metal plate
vehicle
door
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JP5337591B2 (en
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Daiei Tonooka
大英 殿岡
Fumiharu Ochiai
史治 落合
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To reduce weight, after securing a required strength of a retainer and a bracket, in an airbag device supporting an airbag and an inflator in a folding-up state on the retainer and the bracket composed of a metal plate.SOLUTION: A multiple superposing part 24b is formed by folding back the end (an inner joining flange 24a) of an airbag holding member (a retainer body 24) formed of a thin metal plate, and the superposing part 24b is fastened to the other metallic member (a retainer plate 23).

Description

この発明は、車両のサイドドア等に設置されるエアバッグ装置に関する。   The present invention relates to an airbag device installed on a side door or the like of a vehicle.

従来、上記エアバッグ装置において、金属板からなるリテーナに折り畳み状態のエアバッグ及びインフレータ等を支持してエアバッグモジュールとしたものがある(例えば、特許文献1参照。)。   Conventionally, in the above-described airbag apparatus, there is an airbag module in which a folded airbag and an inflator are supported by a retainer made of a metal plate (see, for example, Patent Document 1).

特開2008−213621号公報JP 2008-213621 A

ところで、上記において、エアバッグモジュールのリテーナやインフレータブラケットは、強度が必要な部分と不必要な部分とで板厚が同じ場合が多い。すなわち、リベット結合部やボルト締結部等の機械的固定部分とそれ以外の一般部分とで板厚が同一とされ、強度的な無駄が生じることがあった。他方、リテーナやインフレータブラケットを単に薄肉化すると、軽量化が可能な反面、前記機械的固定部分の強度が不足することがあった。   By the way, in the above, the retainer and the inflator bracket of the airbag module often have the same plate thickness in a portion requiring strength and an unnecessary portion. That is, the plate thickness is the same in the mechanical fixing portion such as the rivet coupling portion and the bolt fastening portion and the other general portion, and strength wasted. On the other hand, if the retainer or the inflator bracket is simply thinned, the weight can be reduced, but the strength of the mechanical fixing portion may be insufficient.

そこでこの発明は、折り畳み状態のエアバッグやインフレータを金属板からなるリテーナやブラケットに支持したエアバッグ装置において、リテーナ及びブラケットの必要強度を確保した上でその軽量化を図ることを目的とする。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the weight of an airbag device in which a folded airbag or inflator is supported by a retainer or a bracket made of a metal plate while ensuring the necessary strength of the retainer and the bracket.

上記課題の解決手段として、請求項1に記載した発明は、折り畳まれた状態でリテーナ(例えば実施例のリテーナ20)に収容保持されるエアバッグ(例えば実施例のエアバッグ19)を備えたエアバッグ装置であって、金属製の薄板により形成されるエアバッグ保持部材(例えば実施例のリテーナ本体24、ブラケット30)の端部(例えば実施例の内結合フランジ24a、上延出片32)を折り返して多重とした重合部(例えば実施例の重合部24b,32a)を形成すると共に、該重合部を他の金属部材(例えば実施例のリテーナプレート23、取付ブラケット10)に締結部材(例えば実施例のリベットR1、ボルトB3)により締結することを特徴とする。
請求項2に記載した発明は、前記リテーナが複数の金属板部品(例えば実施例のリテーナプレート23、リテーナ本体24)を互いに結合してなり、該各金属板部品の少なくとも一つ(例えば実施例のリテーナ本体24)に前記重合部(例えば実施例の重合部24b)を形成し、該重合部を他の金属板部品(例えば実施例のリテーナプレート23)に締結することを特徴とする。
請求項3に記載した発明は、前記エアバッグ保持部材の一つであるインフレータ(例えば実施例のインフレータ18)支持用の金属板部品(例えば実施例のブラケット30)を車体側金属板部品(例えば実施例の取付ブラケット10)に締結してなり、該各金属板部品の少なくとも一つ(例えば実施例のブラケット30)に前記重合部(例えば実施例の重合部32a)を形成し、該重合部を他の金属板部品(例えば実施例の取付ブラケット10)に締結することを特徴とする。
請求項4に記載した発明は、前記車体側金属板部材は車両のドアパネルであることを特徴とする。
As a means for solving the above-mentioned problems, the invention described in claim 1 is an airbag including an airbag (for example, the airbag 19 of the embodiment) that is accommodated and held in a retainer (for example, the retainer 20 of the embodiment) in a folded state. An end portion (for example, the inner coupling flange 24a and the upper extension piece 32 of the embodiment) of the airbag holding member (for example, the retainer body 24 and the bracket 30 of the embodiment) formed of a thin metal plate is used as the bag device. A plurality of overlapping portions (for example, overlapping portions 24b and 32a in the embodiment) are formed by folding, and the overlapping portions are connected to other metal members (for example, the retainer plate 23 and the mounting bracket 10 in the embodiment) by fastening members (for example, the embodiment). It is characterized by being fastened by an example rivet R1, bolt B3).
According to a second aspect of the present invention, the retainer is formed by connecting a plurality of metal plate parts (for example, the retainer plate 23 and the retainer body 24 of the embodiment) to each other, and at least one of the metal plate parts (for example, the embodiment). The retainer body 24) is formed with the overlap portion (for example, the overlap portion 24b of the embodiment), and the overlap portion is fastened to another metal plate part (for example, the retainer plate 23 of the embodiment).
According to a third aspect of the present invention, a metal plate component (for example, the bracket 30 of the embodiment) for supporting an inflator (for example, the inflator 18 of the embodiment) which is one of the airbag holding members is replaced with a vehicle body side metal plate component (for example, the bracket 30). It is fastened to the mounting bracket 10) of the embodiment, and the overlapping portion (for example, the overlapping portion 32a of the embodiment) is formed on at least one of the metal plate parts (for example, the bracket 30 of the embodiment). Is fastened to another metal plate part (for example, the mounting bracket 10 of the embodiment).
The invention described in claim 4 is characterized in that the vehicle body side metal plate member is a door panel of a vehicle.

この発明によれば、エアバッグを収容保持するリテーナやインフレータ支持用のブラケットにおいて、強度が必要な部分と不必要な部分とを区分けし、衝撃荷重等の過大な荷重(エアバッグの展開反力等)が印加される機械的固定部分をヘミング加工(安全確保や補強を目的として金属板の縁部を折り返す加工)にて補強することで、強度が必要な部分は金属板の重合化により比較的強度を高める一方、過大な強度が不要な部分は金属板の単板化により比較的薄肉かつ軽量にすることができる。すなわち、リテーナ及びブラケットの必要強度を確保した上でその軽量化を図ることができる。   According to the present invention, in a retainer or inflator support bracket that accommodates and holds an airbag, a portion that requires strength is separated from an unnecessary portion, and an excessive load such as an impact load (an airbag deployment reaction force) Etc.) is applied with a hemming process (the process of turning back the edge of a metal plate for the purpose of ensuring safety and reinforcement), and the parts that require strength are compared by polymerization of the metal plate. While increasing the mechanical strength, the portion that does not require excessive strength can be made relatively thin and light by making the metal plate a single plate. That is, it is possible to reduce the weight of the retainer and the bracket while ensuring the necessary strength.

この発明の実施例における右サイドドアを車内側から見た側面図である。It is the side view which looked at the right side door in the Example of this invention from the vehicle inside. 上記右サイドドアの内装を取り外した状態の側面図である。It is a side view of the state which removed the interior of the said right side door. (a)は図1のA−A断面図、(b)は(a)の要部拡大図である。(A) is AA sectional drawing of FIG. 1, (b) is the principal part enlarged view of (a). 上記右サイドドアのエアバッグモジュールの分解斜視図である。It is a disassembled perspective view of the airbag module of the said right side door. 上記エアバッグモジュールを車外側から見た側面図である。It is the side view which looked at the above-mentioned air bag module from the car outside. 上記エアバッグモジュールのバッグカバーの斜視図である。It is a perspective view of the bag cover of the said airbag module. (a)は図5のB−B断面図、(b)は(a)の要部拡大図である。(A) is BB sectional drawing of FIG. 5, (b) is the principal part enlarged view of (a).

以下、この発明の実施例について図面を参照して説明する。なお、以下の説明における前後左右等の向きは、特に記載が無ければ車両における向きと同一とする。また、図中矢印FRは車両前方を、矢印LHは車両左方を、矢印UPは車両上方をそれぞれ示す。   Embodiments of the present invention will be described below with reference to the drawings. Note that the directions such as front, rear, left and right in the following description are the same as those in the vehicle unless otherwise specified. In the figure, the arrow FR indicates the front of the vehicle, the arrow LH indicates the left side of the vehicle, and the arrow UP indicates the upper side of the vehicle.

図1,2は窓枠部を持たない所謂サッシュレスタイプの車両の右フロントサイドドア(以下、単にドアという)1を車内側から見た図である。ドア1の下半部を構成するドア本体3内には、ドアガラス4が昇降自在に保持される。ドア本体3は、ドア骨格部5と、該ドア骨格部5の車外側に取り付けられるドアスキン6(図3参照)等によって構成される。   1 and 2 are views of a right front side door (hereinafter simply referred to as a door) 1 of a so-called sashless type vehicle having no window frame portion, as viewed from the inside of the vehicle. A door glass 4 is held up and down in a door body 3 constituting the lower half of the door 1. The door body 3 includes a door skeleton 5 and a door skin 6 (see FIG. 3) attached to the vehicle outer side of the door skeleton 5.

ドア本体3の前端部の上縁側には、ドアミラー取付用のミラーベース8が一体に設けられ、ドア本体3の上縁部の車内側には、モジュール化されたドアマウント型エアバッグ装置(以下、エアバッグモジュール9という)取付用の取付ブラケット10が車内側から取り付けられる。   A mirror base 8 for attaching a door mirror is integrally provided on the upper edge side of the front end portion of the door body 3, and a modularized door-mounted airbag device (hereinafter referred to as “module”) is provided on the inner side of the upper edge portion of the door body 3. A mounting bracket 10 for mounting (referred to as an airbag module 9) is mounted from the inside of the vehicle.

図2を参照し、取付ブラケット10は、ドア本体3の上縁部に沿うように前後に延在する平板状のベースプレート部11を備える。ベースプレート部11の上縁部には、その前側に単一のエアバッグ締結片12Aが上方に向かって突設されると共に、上縁部の後側には、前後に並ぶ三つのエアバッグ係止爪13A,13B,13Cが上方に向かって突設される。また、ベースプレート部11の下縁部前側には、前後に並ぶ二つのエアバッグ締結片12B,12Cが下方に向かって突設される。   Referring to FIG. 2, the mounting bracket 10 includes a flat plate-like base plate portion 11 that extends back and forth along the upper edge portion of the door body 3. A single airbag fastening piece 12A protrudes upward from the upper edge of the base plate portion 11 at the front side thereof, and three airbags lined up in front and rear are arranged at the rear side of the upper edge portion. The claws 13A, 13B, and 13C are projected upward. In addition, two airbag fastening pieces 12B and 12C arranged in the front-rear direction are provided on the front side of the lower edge portion of the base plate portion 11 so as to protrude downward.

図3を併せて参照し、取付ブラケット10は、ドア骨格部5の上部に車内側から接した状態でドア本体3に固定されており、この状態において、各エアバッグ係止片13A,13B,13Cは、ドア骨格部5から離間して上方に突出する。また、ドア骨格部5の上縁に形成されたフランジ部15aには、ドアガラス4の車内側の側面に摺動可能に密接する車内側ウェザーストリップ16が取り付けられる。なお、図中符号17は、ドアスキン6の上縁部に取り付けられてドアガラス4の車外側の側面に摺動可能に密接する車外側ウェザーストリップを示す。   Referring also to FIG. 3, the mounting bracket 10 is fixed to the door body 3 in contact with the upper part of the door skeleton 5 from the inside of the vehicle. In this state, the airbag locking pieces 13A, 13B, 13C is spaced apart from the door skeleton 5 and protrudes upward. Further, a vehicle interior weather strip 16 that is slidably in close contact with the vehicle interior side surface of the door glass 4 is attached to the flange portion 15 a formed at the upper edge of the door skeleton portion 5. In addition, the code | symbol 17 in a figure shows the outer side weather strip attached to the upper edge part of the door skin 6, and closely_contact | adhering to the vehicle outer side surface of the door glass 4.

取付ブラケット10の各エアバッグ係止爪13A,13B,13Cには、エアバッグモジュール9車外側の鞘状の爪受部27A,27B,27Cがそれぞれ上方から嵌合される。
ベースプレート部11の下縁部には、ドア本体3と反対側(車内側)に屈曲してからさらに下方に延出する前記エアバッグ締結片12B,12Cが設けられる(図7参照)。
The airbag latching claws 13A, 13B, 13C of the mounting bracket 10 are fitted with sheath-like claw receiving portions 27A, 27B, 27C on the outside of the airbag module 9 from above.
The airbag fastening pieces 12B and 12C are provided at the lower edge portion of the base plate portion 11 and bent downward from the door main body 3 (inner side of the vehicle) and then extended downward (see FIG. 7).

図2,3,4を参照し、エアバッグモジュール9は、車両衝突時等にドア本体3の上部内側に折り畳み収納されたエアバッグ19をドアガラス4の内面に沿って展開させて乗員を保護するもので、不図示のセンサによって衝撃が検知されたときに高圧ガスを発生する筒状のインフレータ18と、該インフレータ18で発生したガス圧によって展開する前記折り畳まれたエアバッグ19と、該エアバッグ19及びインフレータ18を保持する金属製のリテーナ20と、エアバッグ19の展開時に一部が破断してエアバッグ19の展開を許容するバッグカバー21とを備えてなる。  Referring to FIGS. 2, 3, and 4, the airbag module 9 protects the occupant by deploying the airbag 19 that is folded and stored inside the upper portion of the door body 3 along the inner surface of the door glass 4 in the event of a vehicle collision or the like. A cylindrical inflator 18 that generates high-pressure gas when an impact is detected by a sensor (not shown), the folded airbag 19 that is deployed by the gas pressure generated in the inflator 18, and the air A metal retainer 20 that holds the bag 19 and the inflator 18, and a bag cover 21 that is partially broken when the airbag 19 is deployed and allows the airbag 19 to be deployed.

図3(a)を参照し、エアバッグ19は、インフレータ18の後方に連なるガス供給パイプ22の上方に順次積み重なるように折り畳まれることで前後に長い棒状をなし、この状態で不織布等からなる保持部材62内に収納される。以下、エアバッグ19、保持部材、ガス供給パイプ22及びインフレータ18からなる組立体をエアバッグアッセンブリということがある。   Referring to FIG. 3A, the airbag 19 is folded so as to be sequentially stacked above the gas supply pipe 22 connected to the rear of the inflator 18 to form a long rod shape in the front and rear, and in this state, the airbag 19 is made of a nonwoven fabric or the like. The member 62 is accommodated. Hereinafter, an assembly including the airbag 19, the holding member, the gas supply pipe 22, and the inflator 18 may be referred to as an airbag assembly.

インフレータ18は、前記折り畳み状態にあるエアバッグ19の前方に連なるように配置され、車両衝突時等に例えば所定以上の加速度が検出される等の展開条件が整った際に高圧ガスを発生して、前記折り畳み状態にあるエアバッグ19を上方へ膨張展開させる。   The inflator 18 is arranged so as to continue to the front of the airbag 19 in the folded state, and generates high-pressure gas when a deployment condition such as detection of an acceleration of a predetermined level or more is satisfied in a vehicle collision or the like. The airbag 19 in the folded state is inflated and deployed upward.

リテーナ20は、上方に開放する断面コ字状をなして前後に延在し、その内部に前記折り畳み状態にあるエアバッグ19を収納保持する。リテーナ20は、その車外側壁を構成する平板状のリテーナプレート23と、車内側壁及び下壁を構成する断面L字状のリテーナ本体24とに分割構成される。   The retainer 20 has a U-shaped cross section that opens upward and extends in the front-rear direction, and stores and holds the airbag 19 in the folded state therein. The retainer 20 is divided into a flat plate-like retainer plate 23 that forms the outer wall of the vehicle and a retainer body 24 that has an L-shaped cross section that forms the inner wall and the lower wall of the vehicle.

リテーナプレート23及びリテーナ本体24は、それぞれ鋼板にプレス成形等を施してなる。リテーナプレート23の下縁部には外結合フランジ23aが下方に向けて延設されると共に、リテーナ本体24の下壁の車外側縁部には内結合フランジ24aが下方に向けて延設され、該各結合フランジ23a,24aをリベットR1等により結合することで、一体のリテーナ20が構成される(図3(b)参照)。   The retainer plate 23 and the retainer body 24 are each formed by press forming a steel plate. An outer coupling flange 23a extends downward on the lower edge of the retainer plate 23, and an inner coupling flange 24a extends downward on the vehicle outer edge of the lower wall of the retainer body 24. By connecting the connecting flanges 23a and 24a with rivets R1 or the like, an integrated retainer 20 is configured (see FIG. 3B).

リテーナプレート23の車内側には前記エアバッグアッセンブリが支持される。以下、リテーナプレート23にエアバッグアッセンブリを組み付けた組立体をエアバッグ組立体ということがある。
一方、リテーナ本体24は、リテーナプレート23と結合する前にバッグカバー21の内側に一体的に取り付けられる(図4参照)。リテーナプレート23及びリテーナ本体24は、前記エアバッグ組立体とバッグカバー21とを組み付ける際に前記リベットR1等により一体に結合される。
The airbag assembly is supported on the inner side of the retainer plate 23. Hereinafter, an assembly in which the airbag assembly is assembled to the retainer plate 23 may be referred to as an airbag assembly.
On the other hand, the retainer main body 24 is integrally attached to the inside of the bag cover 21 before being joined to the retainer plate 23 (see FIG. 4). The retainer plate 23 and the retainer main body 24 are integrally coupled by the rivet R1 or the like when the airbag assembly and the bag cover 21 are assembled.

図1,3,6を参照し、バッグカバー21は、ドアライニング2と共にドア1の車内側意匠面を形成するカバーアウタ35と、該カバーアウタ35の裏面側(内側)に溶着固定されてカバーアウタ35各部の剛性調整や他部品との連結機能を担うカバーインナ36とを有してなる。   1, 3, and 6, the bag cover 21 is welded and fixed to a cover outer 35 that forms the interior design surface of the door 1 together with the door lining 2, and each part of the cover outer 35 is welded and fixed to the back side (inside) of the cover outer 35. And a cover inner 36 for carrying out the function of adjusting the rigidity and connecting with other parts.

図3(a)を参照し、カバーアウタ35は、比較的硬質の樹脂材料からなる基材35aの外側に比較的軟質の樹脂材料からなる表皮材35bを一体に接合した二層構造とされる。カバーアウタ35は、リテーナ20の上部を覆う上壁37とリテーナ20の車内側を覆う側壁38とを滑らかに連続させるように設けられる。   Referring to FIG. 3A, the cover outer 35 has a two-layer structure in which a skin material 35b made of a relatively soft resin material is integrally joined to the outside of a base material 35a made of a relatively hard resin material. The cover outer 35 is provided so that the upper wall 37 that covers the upper portion of the retainer 20 and the side wall 38 that covers the vehicle interior side of the retainer 20 are smoothly continuous.

図2を参照し、前記エアバッグ組立体にバッグカバー21を組み付けた状態では、リテーナプレート23の前端部及びインフレータ18はバッグカバー21の前端よりも前方に突出する。
ここで、図4,5,7を参照し、インフレータ18は、リテーナプレート23の前端部にブラケット30を介して支持される。ブラケット30はインフレータ18の外周を巻回するバンド状の金属板からなり、該ブラケット30の両端部31がインフレータ18の下方で重なってリテーナプレート23の前端部にボルトB1等により締結固定される(図7参照)。
Referring to FIG. 2, in the state where the bag cover 21 is assembled to the airbag assembly, the front end portion of the retainer plate 23 and the inflator 18 protrude forward from the front end of the bag cover 21.
4, 5, and 7, the inflator 18 is supported on the front end portion of the retainer plate 23 via the bracket 30. The bracket 30 is made of a band-shaped metal plate wound around the outer periphery of the inflator 18, and both end portions 31 of the bracket 30 overlap below the inflator 18 and are fastened and fixed to the front end portion of the retainer plate 23 by bolts B1 or the like ( (See FIG. 7).

リテーナプレート23の前部下側に突設されるエアバッグ締結部33B,33Cは、前記取付ブラケット10のエアバッグ締結片12B,12CにそれぞれボルトB2等により結合固定される(図7参照)。また、ブラケット30の車外側には上方に延出する上延出片32が溶接等により結合され、該上延出片32の上部が取付ブラケット10上部のエアバッグ締結片12AにボルトB3等により結合固定される(図7参照)。なお、上延出片32はブラケット30に一体形成されていてもよい。   Airbag fastening portions 33B and 33C projecting from the front lower side of the retainer plate 23 are coupled and fixed to the airbag fastening pieces 12B and 12C of the mounting bracket 10 by bolts B2 or the like, respectively (see FIG. 7). Further, an upper extension piece 32 extending upward is coupled to the vehicle exterior side of the bracket 30 by welding or the like, and the upper portion of the upper extension piece 32 is connected to the airbag fastening piece 12A above the mounting bracket 10 by bolts B3 or the like. They are coupled and fixed (see FIG. 7). The upper extending piece 32 may be integrally formed with the bracket 30.

図3,4を参照し、リテーナプレート23の上縁部車外側には、波形の板部材26が複数箇所で固定される。板部材26の固定部間には鞘状の爪受部27A,27B,27Cがそれぞれ形成され、該各爪受部27A,27B,27Cに取付ブラケット10上部の各エアバッグ係止爪13A,13B,13Cがそれぞれ下方から挿通される。これにより、リテーナプレート23ひいてはエアバッグ組立体が取付ブラケット10ひいてはドア本体3に位置決め支持される。   Referring to FIGS. 3 and 4, corrugated plate members 26 are fixed at a plurality of locations on the outer side of the upper edge portion of the retainer plate 23. Sheath-shaped claw receiving portions 27A, 27B, and 27C are formed between the fixing portions of the plate member 26, and the air bag locking claws 13A and 13B on the upper portion of the mounting bracket 10 are formed on the claw receiving portions 27A, 27B, and 27C, respectively. , 13C are inserted from below. As a result, the retainer plate 23 and thus the airbag assembly are positioned and supported by the mounting bracket 10 and thus the door body 3.

図4,5,6を参照し、カバーアウタ35の上壁37には、例えば前記基材35aの裏面にV字溝を形成する等によりエアバッグ19展開時に破断可能とした破断誘導部41が設けられる。この破断誘導部41に囲まれた前後に長い略長方形状の領域(以下、リッド領域42という)は、エアバッグ19の膨張展開時に破断誘導部41が破断することで開口し、エアバッグ19の上方への膨張展開を許容する。なお、破断誘導部41が破断してバッグカバー21の上部がその車内側縁部を中心に上方へ回動した状態を図3(a)に鎖線で示す。   4, 5, and 6, the upper wall 37 of the cover outer 35 is provided with a break guide portion 41 that can be broken when the airbag 19 is deployed, for example, by forming a V-shaped groove on the back surface of the base material 35 a. It is done. A substantially rectangular region (hereinafter referred to as a lid region 42) long before and after being surrounded by the breakage guide portion 41 is opened when the breakage guide portion 41 breaks when the airbag 19 is inflated and deployed. Allow upward expansion and deployment. In addition, the state which the fracture | rupture induction | guidance | derivation part 41 fractured | ruptured and the upper part of the bag cover 21 rotated upwards centering on the vehicle inner edge part is shown with a dashed line in Fig.3 (a).

図6を参照し、カバーインナ36は前記基材35aと同様の比較的硬質の樹脂材料からなり、カバーアウタ35の上壁37及び側壁38の裏面にそれぞれ溶着固定されるインナ上壁45及びインナ側壁46を有する。インナ上壁45には前後に長い略長方形状の切り欠き部47が設けられ、この切り欠き部47内にはバッグカバー21上部のリッド領域42に対応する略長方形状のリッド壁48が配置される。   Referring to FIG. 6, the cover inner 36 is made of a relatively hard resin material similar to the base material 35 a and is welded and fixed to the back surfaces of the upper wall 37 and the side wall 38 of the cover outer 35, respectively. 46. The inner upper wall 45 is provided with a substantially rectangular cutout portion 47 that is long in the front and rear, and a substantially rectangular lid wall 48 corresponding to the lid region 42 on the top of the bag cover 21 is disposed in the cutout portion 47. The

図3を併せて参照し、リッド壁48は、その上面がバッグカバー21のリッド領域42の下面(裏面)に溶着固定されると共に、その車内側縁部が複数の帯状片53を介してインナ側壁46の上縁部に連結される。各帯状片53は下方に膨出するように円弧状に湾曲し、カバーアウタ35に対して溶着されることなく離間する。これら各帯状片53は、エアバッグ19展開時にリッド壁48及びリッド領域42が跳ね上がる際のヒンジ部44として機能する。   Referring also to FIG. 3, the upper surface of the lid wall 48 is welded and fixed to the lower surface (back surface) of the lid region 42 of the bag cover 21, and the inner side edge portion of the lid wall 48 is connected to the inner portion via a plurality of strip-shaped pieces 53. Connected to the upper edge of the side wall 46. Each strip 53 is curved in an arc shape so as to bulge downward, and is separated from the cover outer 35 without being welded. Each of the strips 53 functions as a hinge portion 44 when the lid wall 48 and the lid region 42 jump up when the airbag 19 is deployed.

インナ側壁46には車外側に***する複数の***部49が形成される。各***部49にはそれぞれ係止孔50が形成され、これら各係止孔50にリテーナ20の車外側上縁部に延設された複数の係止フック51がそれぞれ挿入、係合される(図3(a)参照)。これにより、リテーナ20の車外側上縁部にカバーインナ36ひいてはバッグカバー21が支持される。なお、カバーアウタ35の側壁38の裏面にはカバーインナ36とは別の樹脂製の締結部材52が溶着固定され(図3(a)参照)、この締結部材52を介してリテーナ20の車外側下部にカバーアウタ35がビス等により締結固定される。   A plurality of raised portions 49 are formed on the inner side wall 46 so as to protrude outward from the vehicle. A locking hole 50 is formed in each of the raised portions 49, and a plurality of locking hooks 51 extending from the upper outer edge of the retainer 20 are inserted into and engaged with the locking holes 50, respectively ( (See FIG. 3 (a)). As a result, the cover inner 36 and the bag cover 21 are supported at the upper outer edge of the retainer 20. In addition, a resin fastening member 52 different from the cover inner 36 is welded and fixed to the back surface of the side wall 38 of the cover outer 35 (see FIG. 3A). The cover outer 35 is fastened and fixed by screws or the like.

図4,6を参照し、カバーインナ36の切り欠き部47の前方及び後方には、インナ上壁45及びインナ側壁46に跨る前後フランジ壁54がそれぞれ設けられる。各フランジ壁54には、リテーナ本体24の車内側壁の前後端から車外側に起立する前後端部壁25がそれぞれボルト等により固定される。前後端部壁25の先端部にはそれぞれフランジ25aが設けられ、該各フランジ25aがリテーナプレート23の前後にそれぞれボルト等により固定される。   4 and 6, front and rear flange walls 54 straddling the inner upper wall 45 and the inner side wall 46 are provided in front and rear of the notch 47 of the cover inner 36, respectively. The front and rear end walls 25 erected from the front and rear ends of the inner wall of the retainer body 24 to the outer side of the vehicle are fixed to the flange walls 54 by bolts or the like. Flange 25a is provided at the front end of front and rear end wall 25, and each flange 25a is fixed to the front and rear of retainer plate 23 by bolts or the like.

図4,5,6を参照し、リッド壁48の自由端側(車外側)の下方には、破断が容易な薄肉部を介して固定壁56が連設される。固定壁56の下縁には複数の連結片57が突設され、該各連結片57がリテーナ20のリテーナプレート23にリベット等により固定される。   Referring to FIGS. 4, 5, and 6, a fixed wall 56 is continuously provided below a free end side (vehicle outer side) of the lid wall 48 via a thin portion that can be easily broken. A plurality of connecting pieces 57 project from the lower edge of the fixed wall 56, and each connecting piece 57 is fixed to the retainer plate 23 of the retainer 20 by rivets or the like.

そして、エアバッグ19の膨張展開時には、該エアバッグ19がバッグカバー21の上壁を下方から押し上げ、前記薄肉部を破断させると共に破断誘導部41を破断させて、前記ヒンジ部44を中心にリッド領域42を上方に跳ね上げるように回動させる。これにより、バッグカバー21の上部にエアバッグ19の上方への膨張展開を許容する開口が形成される。   When the airbag 19 is inflated and deployed, the airbag 19 pushes up the upper wall of the bag cover 21 from below, thereby breaking the thin portion and breaking the breakage guide portion 41, and opening the lid around the hinge portion 44. The region 42 is rotated so as to jump up. As a result, an opening that allows inflation and deployment of the airbag 19 upward is formed in the upper portion of the bag cover 21.

ここで、エアバッグ19の膨張展開時には、その反力がリテーナ20を介してドア本体3等に受け止められる。このとき、リテーナ20の下部を結合する前記各結合フランジ23a,24a及びインフレータ18を支持する前記上延出片32等にも前記反力が作用することとなるが、図3(b)に示すように、リテーナ20の例えば内結合フランジ24aは、例えば車内側かつ上方に折り返すことで二重構造の重合部24bを形成し、前記反力を受けた際にリベットR1等の結合部材の挿通孔から亀裂が生じる等の破損が抑制される。同様に、図7(b)に示すように、前記上延出片32の上部も例えば車内側かつ下方に折り返すことで二重構造の重合部32aを形成し、前記反力を受けた際にボルトB3等の結合部材の挿通孔から亀裂が生じる等の破損が抑制される。   Here, when the airbag 19 is inflated and deployed, the reaction force is received by the door body 3 or the like via the retainer 20. At this time, the reaction force also acts on the coupling flanges 23a and 24a that couple the lower part of the retainer 20 and the upper extension piece 32 that supports the inflator 18, etc., as shown in FIG. As described above, for example, the inner coupling flange 24a of the retainer 20 forms, for example, a double overlapped portion 24b by folding back to the vehicle inner side and upward, and when receiving the reaction force, the insertion hole of the coupling member such as the rivet R1 Damage such as cracking is suppressed. Similarly, as shown in FIG. 7 (b), the upper portion of the upper extension piece 32 is also folded, for example, inward and downward of the vehicle to form a double overlapping portion 32a, and when the reaction force is received. Damage, such as a crack occurring from the insertion hole of the coupling member such as the bolt B3, is suppressed.

以上説明したように、上記実施例におけるエアバッグ装置は、折り畳まれた状態でリテーナ20に収容保持されるエアバッグ19を備えたものであって、金属製の薄板により形成されるエアバッグ保持部材(リテーナ本体24、ブラケット30)の端部(内結合フランジ24a、上延出片32)を折り返して多重とした重合部24b,32aを形成すると共に、該重合部24b,32aを他の金属部材(リテーナプレート23、取付ブラケット10)に締結部材(リベットR1、ボルトB3)により締結するものである。
なお、上記エアバッグ装置は、前記リテーナ20が複数の金属板部品(リテーナプレート23、リテーナ本体24)を互いに結合してなり、該各金属板部品の少なくとも一つ(リテーナ本体24)に前記重合部24bを形成し、該重合部24bを他の金属板部品(リテーナプレート23)に締結するものである。
また、上記エアバッグ装置は、前記エアバッグ保持部材の一つであるインフレータ18支持用の金属板部品(ブラケット30)を車体側金属板部品(取付ブラケット10)に締結してなり、該各金属板部品の少なくとも一つ(ブラケット30)に前記重合部32aを形成し、該重合部32aを他の金属板部品(取付ブラケット10)に締結するものである。
As described above, the airbag apparatus in the above embodiment includes the airbag 19 that is accommodated and held in the retainer 20 in a folded state, and is an airbag holding member formed of a thin metal plate. The overlapping portions 24b and 32a are formed by folding the end portions (the inner coupling flange 24a and the upper extending piece 32) of the (retainer main body 24 and bracket 30), and the overlapping portions 24b and 32a are made into other metal members. The fastening member (the rivet R1 and the bolt B3) is fastened to the (retainer plate 23, the mounting bracket 10).
In the airbag apparatus, the retainer 20 is formed by joining a plurality of metal plate parts (retainer plate 23, retainer body 24) to each other, and the superposition is performed on at least one of the metal plate parts (retainer body 24). A portion 24b is formed, and the overlapping portion 24b is fastened to another metal plate part (retainer plate 23).
The airbag device is formed by fastening a metal plate part (bracket 30) for supporting an inflator 18 which is one of the airbag holding members to a vehicle body side metal plate part (mounting bracket 10). The overlapping portion 32a is formed on at least one plate component (bracket 30), and the overlapping portion 32a is fastened to another metal plate component (mounting bracket 10).

この構成によれば、エアバッグ19を収容保持するリテーナ20やインフレータ18支持用のブラケット30において、強度が必要な部分と不必要な部分とを区分けし、衝撃荷重等の過大な荷重(エアバッグ19の展開反力等)が印加される機械的固定部分(締結部分)をヘミング加工(安全確保や補強を目的として金属板の縁部を折り返す加工)にて補強することで、強度が必要な部分は金属板の重合化により比較的強度(せん断荷重耐性)を高める一方、過大な強度が不要な部分は金属板の単板化により比較的薄肉かつ軽量にすることができる。すなわち、前記リテーナ20やブラケット30等のエアバッグ保持部材の必要強度を確保した上でその軽量化を図ることができる。   According to this configuration, in the retainer 20 that accommodates and holds the airbag 19 and the bracket 30 for supporting the inflator 18, a portion that requires strength is divided from a portion that does not need strength, and an excessive load such as an impact load (airbag) Strength is required by reinforcing the mechanical fixing part (fastening part) to which a reaction force (19 development reaction force, etc.) is applied by hemming (turning the edge of the metal plate for the purpose of ensuring safety or reinforcement). While the portion is relatively increased in strength (shear load resistance) by polymerization of the metal plate, the portion that does not require excessive strength can be made relatively thin and light by making the metal plate as a single plate. That is, it is possible to reduce the weight of the air bag holding member such as the retainer 20 and the bracket 30 while ensuring the necessary strength.

なお、この発明は上記実施例に限られるものではなく、例えば、前記リテーナ20やブラケット30の重合部24b,32aを車両のドアパネル(ドア骨格部5等)に直接締結する等、当該発明の要旨を逸脱しない範囲で種々の変更が可能であることはいうまでもない。   The present invention is not limited to the above-described embodiment. For example, the overlapping portions 24b and 32a of the retainer 20 and the bracket 30 are directly fastened to the door panel (door frame portion 5 and the like) of the vehicle. Needless to say, various modifications can be made without departing from the scope of the present invention.

5 ドア骨格部(ドアパネル)
10 取付ブラケット(他の金属部材、金属板部品)
18 インフレータ
19 エアバッグ
20 リテーナ
23 リテーナプレート(他の金属部材、金属板部品)
24 リテーナ本体(エアバッグ保持部材、金属板部品)
24a 内結合フランジ(端部)
24b 重合部
30 ブラケット(エアバッグ保持部材、金属板部材)
32 上延出片(端部)
32a 重合部
R1 リベット(締結部材)
B3 ボルト(締結部材)

5 Door framework (door panel)
10 Mounting bracket (other metal parts, metal plate parts)
18 Inflator 19 Airbag 20 Retainer 23 Retainer plate (other metal members, metal plate parts)
24 Retainer body (airbag holding member, metal plate parts)
24a Inner flange (end)
24b superposition part 30 bracket (airbag holding member, metal plate member)
32 Upper extension piece (end)
32a Overlapping part R1 Rivet (fastening member)
B3 bolt (fastening member)

Claims (4)

折り畳まれた状態でリテーナに収容保持されるエアバッグを備えたエアバッグ装置であって、
金属製の薄板により形成されるエアバッグ保持部材の端部を折り返して多重とした重合部を形成すると共に、該重合部を他の金属部材に締結部材により締結することを特徴とするエアバッグ装置。
An airbag device comprising an airbag that is housed and held in a retainer in a folded state,
An airbag device characterized in that an overlapping portion is formed by folding back an end portion of an airbag holding member formed of a metal thin plate, and the overlapping portion is fastened to another metal member by a fastening member. .
前記リテーナが複数の金属板部品を互いに結合してなり、該各金属板部品の少なくとも一つに前記重合部を形成し、該重合部を他の金属板部品に締結することを特徴とする請求項1に記載にエアバッグ装置。   The retainer is formed by joining a plurality of metal plate parts to each other, forming the overlapping portion in at least one of the metal plate components, and fastening the overlapping portion to another metal plate component. Item 2. The airbag device according to Item 1. 前記エアバッグ保持部材の一つであるインフレータ支持用の金属板部品を車体側金属板部品に締結してなり、該各金属板部品の少なくとも一つに前記重合部を形成し、該重合部を他の金属板部品に締結することを特徴とする請求項1又は2に記載のエアバッグ装置。   A metal plate part for supporting an inflator, which is one of the airbag holding members, is fastened to a vehicle body side metal plate part, and the overlapping portion is formed on at least one of the metal plate parts. The airbag device according to claim 1, wherein the airbag device is fastened to another metal plate part. 前記車体側金属板部材は車両のドアパネルであることを特徴とする請求項3に記載のエアバッグ装置。
The airbag device according to claim 3, wherein the vehicle body side metal plate member is a door panel of a vehicle.
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JPWO2021064835A1 (en) * 2019-09-30 2021-04-08
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