JP7188227B2

JP7188227B2 - air bag device

Info

Publication number: JP7188227B2
Application number: JP2019060026A
Authority: JP
Inventors: 稔大野; 哲也尾方; 直紀堀田
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2022-12-13
Anticipated expiration: 2039-03-27
Also published as: JP2020157955A

Description

本発明は、車両に搭載されるエアバッグ装置に関し、詳しくは、エアバッグとインフレーターとを簡便に取付ベースに組み付けることができる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 an airbag device mounted on a vehicle, and more particularly to an airbag device in which an airbag and an inflator can be easily assembled to a mounting base.

従来、例えば、膝保護用のエアバッグ装置では、膨張用ガスを流入させて折畳状態から膨張するエアバッグと、該エアバッグに膨張用ガスを供給するインフレーターと、エアバッグとインフレーターとを保持して、搭載部位に取り付けられる取付ベースとしてのケースと、を備えて構成されていた（例えば、特許文献１参照）。さらに、このエアバッグ装置では、インフレーターが、膨張用ガスを吐出する略円柱状のインフレーター本体と、インフレーター本体を保持する略円筒状のリテーナと、を備えて構成されるとともに、リテーナとインフレーター本体とから突設されるボルトを利用して、エアバッグとインフレーターとをケースに取付固定していた。すなわち、このエアバッグ装置では、折り畳まれたエアバッグの内部に、インフレーター本体とリテーナとを配設させ、インフレーター本体とリテーナとから延びる各ボルトを、エアバッグ外に突出させて、突出させたボルトを、折り畳んだエアバッグを収納したケースの底壁部位から突出させ、そして、各ボルトの先端にナットを締結させて、インフレーターとエアバッグとをケースに組み付けていた。 Conventionally, for example, an airbag device for knee protection includes an airbag that is inflated from a folded state by inflow of inflation gas, an inflator that supplies the inflation gas to the airbag, and the airbag and the inflator. and a case as an attachment base attached to the mounting portion (see, for example, Patent Document 1). Further, in this airbag device, the inflator includes a substantially cylindrical inflator body for discharging inflation gas and a substantially cylindrical retainer for holding the inflator body, and the retainer and the inflator body are The airbag and the inflator are attached and fixed to the case using bolts protruding from the case. That is, in this airbag device, the inflator body and the retainer are arranged inside the folded airbag, and the bolts extending from the inflator body and the retainer project outside the airbag. protrude from the bottom wall portion of the case containing the folded airbag, and nuts are fastened to the tips of the bolts to assemble the inflator and the airbag to the case.

特開２０１８－１６７７９６号公報JP 2018-167796 A

しかし、従来のエアバッグ装置では、複数のボルトとナットとを利用して、取付ベースとしてのケースに対し、エアバッグとインフレーターとを組み付ける構成としており、部品点数が多く、コストや重量を増加させ、さらに、複数のボルトにナットを締結する作業が必要となって、簡便に組み付け難かった。 However, conventional airbag devices use a plurality of bolts and nuts to assemble the airbag and the inflator to a case that serves as a mounting base. In addition, it was difficult to easily assemble because it was necessary to fasten nuts to a plurality of bolts.

本発明は、上述の課題を解決するものであり、構成部品点数を低減できて、軽量化を図ることができるとともに、簡便に組み付けることができるエアバッグ装置を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems, and to provide an airbag device that can reduce the number of constituent parts, achieve weight reduction, and can be easily assembled.

本発明に係るエアバッグ装置では、膨張用ガスを流入させて折畳状態から膨張するエアバッグ、該エアバッグに膨張用ガスを供給するインフレーター、及び、前記エアバッグと前記インフレーターとを保持して、搭載部位に取り付けられる取付ベース、を備えて構成されるエアバッグ装置であって、
前記インフレーターが、先端側に、膨張用ガスを吐出させるガス吐出部を配設させた略円柱状とし、
前記エアバッグが、折り畳まれた状態から膨張用ガスを流入させて膨張する本体部と、該本体部と連通され、前記インフレーターの先端側を挿入させて、前記インフレータからの膨張用ガスを前記本体部に流入させる筒状の流入口部と、を備えて構成され、
前記取付ベースが、板金製として、表面側に、折り畳んだ前記本体部を配置させ、裏面側に、前記流入口部と該流入口部に挿入させた前記インフレーターとを配置させて保持する保持板部、を備え、
該保持板部が、前記インフレーターの先端側を挿入させた前記流入口部の周囲を囲うように、前記インフレーターの軸心の周囲でずれた位置に配置される押圧部と支持部と、を有する構成とし、
前記押圧部が、カシメて、前記支持部側に接近するように塑性変形可能に構成されて、
前記押圧部と前記支持部との間に挿入された前記インフレーターの先端側と、前記インフレーターの先端側を挿入させた前記エアバッグの流入口部と、が、カシメられた前記押圧部と前記支持部とに挟持されて、前記取付ベースに保持される構成としていることを特徴とする。 In the airbag device according to the present invention, an airbag that is inflated from a folded state by inflow of inflation gas, an inflator that supplies the inflation gas to the airbag, and the airbag and the inflator are held. , and a mounting base attached to the mounting portion, wherein
The inflator has a substantially cylindrical shape with a gas discharge part for discharging inflation gas disposed on the tip side,
The airbag has a main body section that is inflated by inflating gas from the airbag in a folded state, and a main body section that communicates with the main body section. and a cylindrical inlet portion for flowing into the portion,
The mounting base is made of sheet metal, and has a holding plate on which the folded main body portion is arranged on the front side, and on which the inlet portion and the inflator inserted into the inlet portion are arranged and held on the back side. has a part,
The holding plate portion has a pressing portion and a support portion which are arranged at offset positions around the axis of the inflator so as to surround the inlet portion into which the tip side of the inflator is inserted. Configuration and
The pressing part is crimped and configured to be plastically deformable so as to approach the supporting part side,
The front end side of the inflator inserted between the pressing portion and the support portion and the inlet portion of the airbag into which the front end side of the inflator is inserted are crimped to form the pressing portion and the support. It is characterized in that it is sandwiched between the parts and held by the mounting base.

本発明に係るエアバッグ装置では、折り畳んだエアバッグの本体部から延びる流入口部を、取付ベースの保持板部の裏面側における押圧部と支持部との間に配置させるとともに、流入口部内にインフレーターの先端側を挿入させ、そして、押圧部をカシメて塑性変形させれば、インフレーターの先端側を挿入させたエアバッグの流入口部が、カシメられた押圧部と支持部とに挟持されて、取付ベースに組み付けられて保持される。このような組付構造では、ボルトやナットを使用せずに、単に、流入口部の周囲に配置される押圧部をカシメて塑性変形させるだけで、簡便に組み付けることができる。 In the airbag device according to the present invention, the inflow port extending from the main body of the folded airbag is arranged between the pressing portion and the support portion on the back surface side of the holding plate portion of the mounting base, and is located in the inflow port. When the front end of the inflator is inserted and the pressing portion is crimped and plastically deformed, the inlet portion of the airbag into which the front end of the inflator is inserted is sandwiched between the crimped pressing portion and the support portion. , assembled to and held by the mounting base. Such an assembly structure can be easily assembled simply by crimping and plastically deforming the pressing portion arranged around the inlet portion without using bolts or nuts.

したがって、本発明に係るエアバッグ装置では、構成部品点数を低減できて、軽量化を図ることができるとともに、単に、押圧部をカシメるだけで、取付ベースに対してエアバッグとインフレーターとを簡便に組み付けることができる。 Therefore, in the airbag device according to the present invention, the number of component parts can be reduced, and the weight can be reduced. can be assembled into

そして、本発明に係るエアバッグ装置では、前記保持板部が、
前記押圧部を、前記インフレーターの先端側に配置させ、前記支持部を、前記インフレーターの軸心に沿う方向で、前記押圧部とずれて配置させるとともに、前記インフレーターの軸心に沿う方向で前記支持部を間にした前記押圧部から離れた位置に、前記インフレーターの軸心側に押圧するようにカシメて、前記インフレーターを前記支持部側に圧接させる第２の押圧部、を配設させて、構成されていることが望ましい。 Further, in the airbag device according to the present invention, the holding plate portion
The pressing portion is arranged on the distal end side of the inflator, and the supporting portion is arranged in a direction along the axial center of the inflator so as to be displaced from the pressing portion, and the supporting portion is arranged in the direction along the axial center of the inflator. a second pressing portion that is crimped so as to press the inflator toward the axial center side of the inflator and presses the inflator against the supporting portion side at a position spaced apart from the pressing portion, and preferably configured.

このような構成では、インフレーターの軸方向に沿って、２箇所の押圧部と１箇所の支持部との複数個所で、インフレーターとエアバッグの流入口部とが支持されることから、安定して、インフレーターとエアバッグの流入口部とが、取付ベースの保持板部に保持される。 With such a configuration, the inflator and the inlet portion of the airbag are supported at a plurality of locations, ie, the two pressing portions and the one support portion along the axial direction of the inflator. , the inflator and the inlet portion of the airbag are held by the holding plate portion of the mounting base.

また、本発明に係るエアバッグ装置では、前記エアバッグが、前記インフレーターの先端側を挿入させた前記流入口部の周囲を、前記インフレーター側に押圧するように巻き付け可能な巻付部、を、前記流入口部に、配設させて構成され、
前記取付ベース若しくは前記インフレーターに、前記巻付部の巻き付け状態を維持可能に、前記巻付部の端末に設けられた被係止部を係止する係止部が、配設されていてもよい。 Further, in the airbag device according to the present invention, the airbag can be wound so as to press the periphery of the inflow port into which the tip side of the inflator is inserted toward the inflator. configured to be disposed in the inflow port,
The mounting base or the inflator may be provided with a locking portion that locks a locked portion provided at an end of the winding portion so that the wound state of the winding portion can be maintained. .

このような構成では、被係止部を設けた端末を周囲の係止部に係止させて、巻付部が解けを防止して巻付状態を維持すれば、この巻付部により、エアバッグの流入口部が、インフレーターの外周面に押圧されることから、インフレーターの外周面に流入口部の内周側が密着して良好なガスシール性を発揮し、押圧部と支持部とがインフレーターの外周面における周方向の全周を良好にシールできる構成でなくとも、的確に、膨張用ガスの漏れを防止できる。 In such a configuration, if the terminal provided with the locked portion is locked to the surrounding locking portion to prevent the wound portion from unraveling and the wound state is maintained, the wound portion prevents the air from becoming loose. Since the inlet portion of the bag is pressed against the outer peripheral surface of the inflator, the inner peripheral side of the inlet portion is in close contact with the outer peripheral surface of the inflator to exhibit good gas sealing properties, and the pressing portion and the support portion are connected to the inflator. Leakage of the inflation gas can be prevented accurately even if the entire circumference of the outer peripheral surface of the valve is not well sealed.

さらに、本発明に係るエアバッグ装置では、前記エアバッグが、前記流入口部の内周側に、前記インフレーターの前記ガス吐出部から吐出される膨張用ガスの前記流入口部外への流出を防止可能に、流出する膨張用ガスの圧力により前記インフレーターの外周面に密着する逆止弁用の可撓性を有したシート材、を配設させていてもよい。 Further, in the airbag device according to the present invention, the airbag is arranged on the inner peripheral side of the inflow port to prevent the inflation gas discharged from the gas discharge portion of the inflator from flowing out of the inflow port. A flexible sheet material for a check valve may be provided that is in close contact with the outer peripheral surface of the inflator due to the pressure of the outflowing inflation gas.

このような構成では、エアバッグの流入口部の内周側に、シート材からなる逆止弁が配設されており、押圧部と支持部とがインフレーターの外周面における周方向の全周を良好にシールできる構成でなくとも、流入口部から流出しようとする膨張用ガスの圧力により、逆止弁を構成するシート材が、インフレーターの外周面に密着され、良好なガスシール性を発揮することから、的確に、膨張用ガスの漏れを防止できる。 In such a configuration, a check valve made of a sheet material is disposed on the inner peripheral side of the inflow port of the airbag, and the pressing portion and the supporting portion cover the entire circumference of the outer peripheral surface of the inflator. Even if the structure does not provide good sealing, the sheet material forming the check valve is brought into close contact with the outer peripheral surface of the inflator due to the pressure of the inflation gas that is about to flow out from the inflow port, thereby exhibiting good gas sealing performance. Therefore, it is possible to accurately prevent leakage of the inflation gas.

そしてまた、本発明に係るエアバッグ装置では、前記保持板部の前記支持部が、周囲の一般部から突出して、前記インフレーターの先端側を挿入させた前記流入口部に圧接されるビード、を配設させて構成されていてもよい。 Further, in the airbag device according to the present invention, the support portion of the holding plate portion protrudes from the surrounding general portion, and includes a bead that is pressed against the inlet portion into which the tip side of the inflator is inserted. It may be arranged and configured.

このような構成では、圧接される挟持部位が、狭いエリアとなって、位置ずれせずに一定位置となることから、エアバッグ装置毎のインフレーターや流入口部の支持部による支持を、安定させることができる。また、ビードの配置として、インフレーターの外周面の周方向に沿って配置させれば、ビードを利用して、流入口部を、インフレーターの周方向に沿った外周面に圧接させることも可能となり、カシメる押圧部の部位と協働して、流入口部のガスシール性を良好にすることもできる。 With such a configuration, the pinched portion to be pressed becomes a narrow area and remains in a fixed position without being displaced, so that the support by the support portion of the inflator and the inlet portion of each airbag device is stabilized. be able to. In addition, if the beads are arranged along the circumferential direction of the outer peripheral surface of the inflator, the beads can be used to press the inlet portion against the outer peripheral surface of the inflator along the circumferential direction. In cooperation with the portion of the pressing portion that is crimped, it is also possible to improve the gas sealing performance of the inlet portion.

本発明に係る一実施形態の膝保護用のエアバッグ装置の車両搭載状態を示す概略縦断面図である。1 is a schematic vertical cross-sectional view showing a state in which a knee-protecting airbag device according to an embodiment of the present invention is mounted on a vehicle; FIG. 実施形態のエアバッグ装置の裏面側（上面側）から見た概略斜視図である。FIG. 2 is a schematic perspective view of the airbag device of the embodiment as seen from the back side (upper side); 実施形態のエアバッグ装置の概略分解斜視図である。1 is a schematic exploded perspective view of an airbag device according to an embodiment; FIG. 実施形態のエアバッグ装置の概略縦断面図であり、左右方向に沿った概略縦断面図である。1 is a schematic vertical cross-sectional view of an airbag device of an embodiment, and is a schematic vertical cross-sectional view along the left-right direction; FIG. 実施形態のエアバッグ装置の概略縦断面図であり、図４のＶ－Ｖ部位に対応する。FIG. 5 is a schematic vertical cross-sectional view of the airbag device of the embodiment, corresponding to the VV portion of FIG. 4; 実施形態のエアバッグ装置の概略縦断面図であり、図４のVI－VI部位に対応する。FIG. 5 is a schematic longitudinal sectional view of the airbag device of the embodiment, corresponding to the VI-VI portion of FIG. 4; 実施形態のエアバッグ装置の概略縦断面図であり、図４のVII－VII部位に対応する。FIG. 5 is a schematic vertical cross-sectional view of the airbag device of the embodiment, corresponding to the VII-VII portion of FIG. 4; 実施形態のエアバッグ装置の概略縦断面図であり、図４のVIII－VIII部位に対応する。FIG. 5 is a schematic longitudinal sectional view of the airbag device of the embodiment, corresponding to the VIII-VIII portion of FIG. 4; 実施形態のエアバッグの流入口部の巻付部の巻付状態を説明する図である。It is a figure explaining the winding state of the winding part of the inflow port part of the airbag of embodiment. 実施形態のエアバッグの流入口部に、逆止弁用のシール材を設けた場合の作用を説明する図である。FIG. 10 is a view for explaining the operation when a sealing material for a check valve is provided at the inlet portion of the airbag of the embodiment; 実施形態の取付ベースの保持板部に設けたビードの変形例を説明する図である。It is a figure explaining the modification of the bead provided in the holding plate part of the attachment base of embodiment. 実施形態のエアバッグにおける巻付部の変形例を示す図である。It is a figure which shows the modification of the winding part in the airbag of embodiment. 実施形態のエアバッグにおける巻付部の他の変形例を示す図である。It is a figure which shows the other modification of the winding part in the airbag of embodiment.

以下、本発明の一実施形態を図面に基づいて説明すると、図１に示すように、実施形態のエアバッグ装置９は、膝保護用のものであり、助手席の前方のインストルメントパネル（適宜、インパネと略す）６の下部側、詳しくは、インパネ６の下部側に配設されたグラブボックス７の下方に、搭載されている。グラブボックス７は、ボックス本体７ａと、ボックス本体７ａの後方を塞ぐドア部７ｂと、を備え、ドア部７ｂは、上縁側を後方に回転させるように開き可能として配設されている。さらに、グラブボックス７の下方には、アンダーカバー８が配設されて、アンダーカバー８の開口８ａに、エアバッグ装置９における後述するエアバッグカバー７０の扉配設壁部７１を配設させて、エアバッグ装置９が、助手席の前方の下方側に、搭載されている。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, an airbag device 9 of the embodiment is for knee protection, and is mounted on the instrument panel (as appropriate) in front of the front passenger seat. , abbreviated as an instrument panel) 6 , more specifically, below a glove box 7 disposed on the lower side of the instrument panel 6 . The glove box 7 includes a box body 7a and a door portion 7b that closes the rear of the box body 7a. The door portion 7b is arranged so that it can be opened so that its upper edge side can be rotated backward. Further, an undercover 8 is arranged below the glove box 7, and a door installation wall portion 71 of an airbag cover 70 of the airbag device 9, which will be described later, is arranged in the opening 8a of the undercover 8. , an airbag device 9 is mounted on the front lower side of the front passenger seat.

エアバッグ装置９は、図１～８に示すように、助手席に着座した乗員の膝を保護するように膨張用ガスを流入させて折畳状態から膨張するエアバッグ１０と、エアバッグ１０に膨張用ガスＧ（図４参照）を供給するインフレーター２０と、エアバッグ１０及びインフレーター２０を保持して、搭載部位としての助手席の前下方側に取り付けられる取付ベース３０と、折り畳んだエアバッグ１０を覆って取付ベース３０に保持されるエアバッグカバー７０と、を備えて構成されている。 As shown in FIGS. 1 to 8, the airbag device 9 includes an airbag 10 that is inflated from a folded state by inflating gas so as to protect the knees of an occupant seated on the passenger seat, and an airbag 10 that is inflated from a folded state. An inflator 20 that supplies inflation gas G (see FIG. 4), a mounting base 30 that holds the airbag 10 and the inflator 20 and is attached to the lower front side of the front passenger seat as a mounting portion, and the folded airbag 10 and an airbag cover 70 held on the mounting base 30 to cover the airbag cover 70 .

なお、本明細書での前後、上下、及び、左右の各方向は、車両搭載状態の方向に略対応するもので、図１～３に示すように、取付ベース３０の略長方形形状の保持板部３１における長尺方向を左右の方向とし、短尺方向を前後の方向として、保持板部３１の直交方向を上下の方向として、説明する。 In this specification, front and rear, up and down, and left and right directions generally correspond to directions in which the vehicle is mounted. As shown in FIGS. The longitudinal direction of the portion 31 is defined as the left-right direction, the short direction thereof is defined as the front-rear direction, and the orthogonal direction of the holding plate portion 31 is defined as the vertical direction.

エアバッグ１０は、図１，３，４，９に示すように、折り畳まれた状態から膨張用ガスＧを流入させて膨張する本体部１１と、本体部１１と連通され、インフレーター２０の先端２０ａ側を挿入させて、インフレーター２０からの膨張用ガスを本体部１１に流入させる筒状（実施形態では円筒状）の流入口部１２と、を備えて構成されている。なお、本体部１１の流入口部１２側には、本体部１１の周壁の構成材料が延びて、本体部１１と流入口部１２とを連結する連結シート部１２ｃが配設されて（図４，６，９参照）、取付ベース３０に保持される流入口部１２側から延びる連結シート部１２ｃにより、膨張時の本体部１１の左右の揺動を、極力、抑制できるように、構成されている。 As shown in FIGS. 1, 3, 4, and 9, the airbag 10 has a main body portion 11 which is inflated by inflating an inflation gas G from a folded state, and a tip end 20a of an inflator 20 which communicates with the main body portion 11. a tubular (cylindrical in the embodiment) inlet portion 12 into which the inflation gas from the inflator 20 flows into the main body portion 11 . A connection sheet portion 12c is provided on the inlet port portion 12 side of the main body portion 11 so as to connect the main body portion 11 and the inlet portion 12 by extending the constituent material of the peripheral wall of the main body portion 11 (FIG. 4). , 6 and 9), and the connection sheet portion 12c extending from the side of the inlet portion 12 held by the mounting base 30 is configured so as to suppress the horizontal rocking of the body portion 11 during inflation as much as possible. there is

本体部１１は、図１の二点鎖線に示すように、膨張時、エアバッグカバー７０の後述する扉部７２（Ｆ，Ｂ）を押し開いて取付ベース３０から後上方向に突出し、乗員の左右の膝の前方で、アンダーカバー８やドア部７ｂ、さらには、インパネ６におけるドア部７ｂの左右両側の部位に沿うような略長方形板状に膨張する。膨張完了時の本体部１１は、取付ベース３０から下方に突出する下部１１ｂと、下部１１ｂから上方へ反転する反転部１１ｃと、乗員の膝の前方側に配設される上部１１ａと、を備える。 1, when inflated, the body portion 11 pushes open door portions 72 (F, B) of the airbag cover 70, which will be described later, to protrude rearward and upward from the mounting base 30, thereby allowing the occupant to In front of the left and right knees, it expands into a substantially rectangular plate shape along the undercover 8, the door portion 7b, and the right and left portions of the door portion 7b of the instrument panel 6. The body portion 11 at the completion of inflation includes a lower portion 11b projecting downward from the mounting base 30, an inverted portion 11c upwardly inverted from the lower portion 11b, and an upper portion 11a disposed in front of the knees of the occupant. .

流入口部１２には、端末の開口１３近傍に、巻付部１５が配設されている。巻付部１５は、エアバッグ１０の流入口部１２の素材（ポリエステルやポリアミド等の合成繊維から織成されたバッグ用基布）と一体的（一体的に織られて形成されたり、あるいは、別途、流入口部１２に対して縫合により一体的としたものを含む）に形成されて、インフレーター２０の先端２０ａ側を挿入させた流入口部１２の外周面１２ａ側に巻付可能な可撓性を有した帯状としている。巻付部１５の端末（先端）１６には、流入口部１２に巻き付けた巻付部１５の巻付状態を維持できるように、取付ベース３０に設けられた係止部としての係止突起５９（図５参照）を挿入させる被係止部としての係止孔１７、が形成されている。 A winding portion 15 is arranged near the opening 13 at the end of the inlet portion 12 . The winding portion 15 is formed integrally with the material of the inflow port portion 12 of the airbag 10 (a bag base fabric woven from synthetic fibers such as polyester and polyamide) (integrally woven or formed, or ), and can be wound around the outer peripheral surface 12a side of the inlet portion 12 into which the tip 20a side of the inflator 20 is inserted. It is made into a belt shape with properties. At the end (tip) 16 of the winding portion 15, a locking protrusion 59 as a locking portion provided on the mounting base 30 so as to maintain the winding state of the winding portion 15 wound around the inlet portion 12 is provided. (See FIG. 5) is formed as a locked portion into which a locking hole 17 is inserted.

なお、エアバッグ１０の本体部１１は、折り畳まれた状態として、取付ベース３０の後述する保持板部３１の表面（下面）３１ａ側に配置され、本体部１１から延びる流入口部１２は、保持板部３１の後述する挿通孔３５を経て、保持板部３１の裏面（上面）３１ｂ側に配置される。そして、挿通孔３５を挿通した流入口部１２は、インフレーター２０の先端２０ａ側を挿入させた状態で、インフレーター２０とともに、保持板部３１に組み付けられて保持される。 The body portion 11 of the airbag 10 is arranged in a folded state on the side of a surface (lower surface) 31a of a holding plate portion 31, which will be described later, of the mounting base 30. It is arranged on the rear surface (upper surface) 31 b side of the holding plate portion 31 through an insertion hole 35 described later in the plate portion 31 . The inflow port portion 12 inserted through the insertion hole 35 is attached to and held by the holding plate portion 31 together with the inflator 20 in a state in which the tip 20a side of the inflator 20 is inserted.

インフレーター２０は、略円柱状として、先端２０ａに、膨張用ガスＧを吐出する複数のガス吐出口２２ａを設けたガス吐出部２２を配設させて構成されている。なお、インフレーター２０の元部２０ｂ側の端面には、作動信号を入力させるための作動用信号線ＬＷを結合させるコネクタ２４が、配設されている（図４参照）。 The inflator 20 has a substantially cylindrical shape, and has a gas discharge portion 22 provided with a plurality of gas discharge ports 22a for discharging the inflation gas G at a tip 20a. A connector 24 for connecting an actuation signal line LW for inputting an actuation signal is provided on the end face of the base portion 20b of the inflator 20 (see FIG. 4).

取付ベース３０は、鋼板等の板金製として、略長方形板状の保持板部３１を備えて構成されている。保持板部３１は、前縁側に、左右方向に沿って、エアバッグ１０の流入口部１２とインフレーター２０とを組み付ける組付座３２を配設させ、組付座３２の周囲を、略平板状として、折り畳まれたエアバッグ１０の本体部１１を支持する支持座５１、としている。 The mounting base 30 is made of sheet metal such as a steel plate and includes a holding plate portion 31 having a substantially rectangular plate shape. The holding plate portion 31 has an assembly seat 32 for assembling the inlet portion 12 of the airbag 10 and the inflator 20 along the left-right direction on the front edge side thereof. and a support seat 51 that supports the main body portion 11 of the folded airbag 10 .

組付座３２は、エアバッグ１０の流入口部１２とインフレーター２０とを収納可能に、下方へ半割り円柱状に凹む凹部３２ａを設けて構成されている。そして、組付座３２は、凹部３２ａを覆うように、支持座５１から上方へ突出するカバー部３３、押圧部３７，４５を配設させるとともに、凹部３２ａを形成するように、支持座５１から下方へ凹む支持部４１，４９を配設させている。さらに、組付座３２は、左端側に、上下を貫通する挿通孔３５を配設させて構成されている。 The assembly seat 32 is configured by providing a concave portion 32a recessed downward in a half-columnar shape so as to accommodate the inlet portion 12 of the airbag 10 and the inflator 20. As shown in FIG. The assembly seat 32 is provided with a cover portion 33 and pressing portions 37 and 45 protruding upward from the support seat 51 so as to cover the recess 32a. Support portions 41 and 49 recessed downward are provided. Further, the assembly seat 32 is configured by disposing an insertion hole 35 penetrating vertically on the left end side.

挿通孔３５は、既述したように、エアバッグ１０の本体部１１から延びる流入口部１２を挿通させる。 The insertion hole 35 allows the inflow port portion 12 extending from the body portion 11 of the airbag 10 to pass therethrough, as described above.

カバー部３３は、流入口部１２に挿入させたインフレーター２０の先端２０ａのガス吐出部２２付近の周囲の上側を覆って、断面略逆Ｕ字状の周壁部３３ａと、周壁部３３ａの左端側（先端側）を塞ぐ天井壁部３３ｂと、を備えて構成されている。 The cover portion 33 covers the upper side of the vicinity of the gas discharge portion 22 of the tip end 20a of the inflator 20 inserted into the inlet portion 12, and includes a peripheral wall portion 33a having a substantially inverted U-shaped cross section and a left end side of the peripheral wall portion 33a. and a ceiling wall portion 33b that closes the (front end side).

支持部４１，４９は、インフレーター２０の先端２０ａ側を挿入させた流入口部１２やインフレーター２０の周囲の下側を囲って、流入口部１２やインフレーター２０を支持する部位である。なお、支持部４９は、第２の支持部、すなわち、第２支持部４９としている。 The support portions 41 and 49 surround the lower side of the inlet portion 12 into which the tip 20a of the inflator 20 is inserted and the inflator 20 to support the inlet portion 12 and the inflator 20 . Note that the support portion 49 is referred to as a second support portion, that is, a second support portion 49 .

この第２支持部４９は、カバー部３３から離れた組付座３２の右端側に配置されるもので、インフレーター２０のガス吐出部２３から離れた元部２０ｂの外周面２１における下側２１ｂを覆うような半割り円筒状として、内周面４９ａにより、インフレーター２０の元部２０ｂ側における外周面２１の下側２１ｂを支持できるように配設されている（図８参照）。 The second support portion 49 is arranged on the right end side of the mounting seat 32 away from the cover portion 33, and supports the lower side 21b of the outer peripheral surface 21 of the base portion 20b away from the gas discharge portion 23 of the inflator 20. The inner peripheral surface 49a is arranged to support the lower side 21b of the outer peripheral surface 21 on the side of the base portion 20b of the inflator 20 (see FIG. 8).

支持部４１は、組付座３２の左右方向の中央付近に配置されるもので、インフレーター２０を挿入させた流入口部１２の開口１３付近と、流入口部１２から突出するインフレーター２０の外周面２１と、の下側を覆うような半割り円筒状として、流入口部１２を介在させたり、あるいは、流入口部１２を介在させない状態のインフレーター２０の外周面２１の下側２１ｂを、支持できるように配設されている。また、支持部４１は、一般部４２から内周側に突出するビード４３を配設させている。図例のビード４３は、インフレーター２０の軸心（軸方向）ＩＣに沿って配設されるとともに、前後に離れて二つ配設されている。 The support portion 41 is arranged near the center of the assembly seat 32 in the left-right direction, and includes the vicinity of the opening 13 of the inlet portion 12 into which the inflator 20 is inserted, and the outer peripheral surface of the inflator 20 protruding from the inlet portion 12 . 21 is formed into a half-cylindrical shape covering the lower side, and the inflator 20 can support the lower side 21b of the outer peripheral surface 21 of the inflator 20 with or without the inflow port 12 interposed therebetween. are arranged as follows. Further, the support portion 41 has a bead 43 protruding from the general portion 42 toward the inner circumference. The beads 43 in the illustrated example are arranged along the axis (axial direction) IC of the inflator 20, and two beads 43 are arranged separately in the front-rear direction.

なお、第２支持部４９にも、支持部４１と同様に、内周面４９ａ側にビード４３が配設されている。 The second support portion 49 also has a bead 43 on the inner peripheral surface 49a side, similarly to the support portion 41 .

押圧部３７は、挿通孔３５と支持部４１との間に配設された略半割り円筒状として、内周側を縮径させるようにカシメて塑性変形させる断面逆Ｕ字状のカシメ部３８と、カシメ部３８の両端から支持座５１側に連結される帯状の縮径部３９と、を備えて構成されている。押圧部３７は、カシメ部３８をカシメて、縮径部３９を、支持部４１側（インフレーター２０の軸心ＩＣ側）に接近させると、押圧部３７と支持部４１との間に挿入させたインフレーター２０を、流入口部１２を介在させた状態で、縮径部３９の内周面３９ａと支持部４１の内周面４１ａ（特に、ビード４３の部位）とで、挟持することとなる。 The pressing portion 37 has a substantially half-cylindrical shape disposed between the insertion hole 35 and the support portion 41, and a crimped portion 38 having an inverted U-shaped cross section that is plastically deformed by crimping so as to reduce the diameter of the inner peripheral side. and band-shaped reduced-diameter portions 39 connected from both ends of the crimped portion 38 to the support seat 51 side. The pressing portion 37 is inserted between the pressing portion 37 and the supporting portion 41 by crimping the crimping portion 38 and moving the reduced diameter portion 39 closer to the supporting portion 41 side (toward the axis IC of the inflator 20). The inflator 20 is sandwiched between the inner peripheral surface 39a of the diameter-reduced portion 39 and the inner peripheral surface 41a of the support portion 41 (in particular, the portion of the bead 43) with the inlet portion 12 interposed therebetween.

押圧部４５は、第２の押圧部、すなわち、第２押圧部４５であり、この第２押圧部４５は、支持部４１と第２支持部４９との間に配設された略半割り円筒状として、押圧部３７と同様に、内周側を縮径させるようにカシメて塑性変形させる断面逆Ｕ字状のカシメ部４６と、カシメ部４６の両端から支持座５１側に連結される帯状の縮径部４７と、を備えて構成されている。押圧部４５は、カシメ部４６をカシメて、縮径部４７を、支持部４１，４９側（インフレーター２０の軸心ＩＣ側）に接近させると、押圧部４５と支持部４１，４９との間に挿入させたインフレーター２０を、縮径部４７の内周面４７ａと支持部４１，４９の内周面４１ａ，４９ａ（特に、ビード４３の部位）とで、挟持することとなる。 The pressing portion 45 is a second pressing portion, that is, the second pressing portion 45, and the second pressing portion 45 is a substantially half-cylinder disposed between the support portion 41 and the second support portion 49. As with the pressing portion 37 , the crimped portion 46 has an inverted U-shaped cross section that is plastically deformed by crimping so as to reduce the diameter of the inner peripheral side, and a band-like shape connected to the support seat 51 side from both ends of the crimped portion 46 . and a reduced diameter portion 47. When the pressing portion 45 crimps the crimping portion 46 to bring the diameter-reduced portion 47 closer to the support portions 41 and 49 (toward the axis IC of the inflator 20), a gap between the pressing portion 45 and the support portions 41 and 49 is reached. The inflator 20 inserted into the inner peripheral surface 47a of the diameter-reduced portion 47 and the inner peripheral surfaces 41a and 49a of the support portions 41 and 49 (in particular, the portions of the beads 43) are sandwiched.

なお、実施形態の場合、インフレーター２０を挿入させたエアバッグ１０の流入口部１２は、第２押圧部４５のエリアまでは到達しないように設定されている。 In the case of the embodiment, the inlet portion 12 of the airbag 10 into which the inflator 20 is inserted is set so as not to reach the area of the second pressing portion 45 .

以上のように、組付座３２では、組み付けるインフレーター２０の軸心（軸方向）ＩＣに沿って、左端側から順に、カバー部３３、挿通孔３５、押圧部３７、支持部４１、第２押圧部４５、及び、第２支持部４９が配設されて、平板状の板金素材からプレス加工により、穴や凹凸を設けて、容易に、組付座３２を設けた保持板部３１を形成することができる。 As described above, in the mounting seat 32, the cover portion 33, the insertion hole 35, the pressing portion 37, the supporting portion 41, and the second pressing portion are arranged in order from the left end along the axis (axial direction) IC of the inflator 20 to be assembled. The part 45 and the second support part 49 are provided, and the holding plate part 31 provided with the mounting seat 32 is easily formed by forming holes and irregularities by pressing a flat sheet metal material. be able to.

取付ベース３０における保持板部３１の左右両側には、エアバッグ装置９を搭載部位に取り付けるための取付ブラケット部５３（Ｌ，Ｒ）が形成されている。取付ブラケット部５３（Ｌ，Ｒ）には、取付孔５３ａが貫通されており、取付孔５３ａを貫通するボルト３をボディ１側のブラケット２にナット４止めすることにより、エアバッグ装置９をグラブボックス７の下方における助手席の前下側に搭載することができる。取付ブラケット部５３（Ｌ，Ｒ）の前後の縁には、補強用のリブ５７が上方へ突設されている。 Mounting bracket portions 53 (L, R) for mounting the airbag device 9 to a mounting portion are formed on both left and right sides of the holding plate portion 31 of the mounting base 30 . Mounting holes 53a pass through the mounting bracket portions 53 (L, R), and bolts 3 passing through the mounting holes 53a are fastened to the bracket 2 on the side of the body 1 with nuts 4, thereby attaching the airbag device 9 to the grip. It can be mounted on the lower front side of the front passenger seat below the box 7 . Reinforcing ribs 57 protrude upward from the front and rear edges of the mounting bracket portion 53 (L, R).

また、取付ベース３０は、支持座５１の前後の縁に、エアバッグカバー７０の連結凸部７６を挿入させて連結保持する連結凹部５５が、開口されている。 Further, the mounting base 30 has openings in the front and rear edges of the support seat 51 with connection recesses 55 into which the connection projections 76 of the airbag cover 70 are inserted and connected.

さらに、支持座５１の上面側における支持部４１の近傍に、巻付部１５の端末１６の被係止部としての係止孔１７に挿入させて、端末１６を係止する係止部としての係止突起５９が、突設されている。 In addition, in the vicinity of the support portion 41 on the upper surface side of the support seat 51, the terminal 16 of the winding portion 15 is inserted into the locking hole 17 as the portion to be locked of the terminal 16, thereby functioning as a locking portion for locking the terminal 16. A locking projection 59 is provided.

エアバッグカバー７０は、図３～８に示すように、ポリオレフィン系熱可塑性エラストマー等の合成樹脂製として、長方形板状の扉配設壁部７１と、扉配設壁部７１の前後の縁から上方に延びる連結壁部７５（Ｆ，Ｂ）と、を備えて構成されている。扉配設壁部７１には、左右方向に沿う薄肉の破断予定部７３が配設されて、エアバッグ１０の本体部１１の膨張時、破断予定部７３を破断させて、前後両側に開く扉部７２（Ｆ，Ｂ）が配設されている。前後の連結壁部７５（Ｆ、Ｂ）は、上端に、取付ベース３０の連結凹部５５に挿入係止される複数の連結凸部７６が、配設されている。 As shown in FIGS. 3 to 8, the airbag cover 70 is made of a synthetic resin such as a polyolefin-based thermoplastic elastomer. and connecting wall portions 75 (F, B) extending upward. A thin breakable portion 73 extending in the left-right direction is provided on the door installation wall portion 71, and when the main body portion 11 of the airbag 10 is inflated, the breakable portion 73 is broken to open the door in both front and rear directions. A portion 72 (F, B) is provided. The front and rear connecting wall portions 75 (F, B) are provided with a plurality of connecting projections 76 that are inserted and locked into the connecting concave portions 55 of the mounting base 30 at the upper ends.

実施形態のエアバッグ装置９の組立作業を説明すると、まず、エアバッグ１０の本体部１１を折り畳んで、折り崩れ防止用の図示しないラッピング材で包む。ついで、エアバッグ１０の本体部１１を取付ベース３０の保持板部３１の表面３１ａ側に配置させて、流入口部１２を挿通孔３５を経て保持板部３１の裏面３１ｂ側に取り出すとともに、エアバッグカバー７０により、本体部１１を包むようにして、連結壁部７５Ｆ，７５Ｂの各連結凸部７６を、保持板部３１の対応する連結凹部５５に挿入係止する。 First, the body portion 11 of the airbag 10 is folded and wrapped with a wrapping material (not shown) for preventing collapse. Next, the body portion 11 of the airbag 10 is arranged on the surface 31a side of the holding plate portion 31 of the mounting base 30, and the inflow port portion 12 is taken out to the rear surface 31b side of the holding plate portion 31 through the insertion hole 35. The connecting projections 76 of the connecting wall portions 75F and 75B are inserted into and locked to the corresponding connecting concave portions 55 of the holding plate portion 31 so as to wrap the body portion 11 with the bag cover 70 .

そして、挿通孔３５を挿通させた流入口部１２を、カシメ前の押圧部３７の内周側に配置させ、ついで、インフレーター２０の先端２０ａ側を流入口部１２内に挿入し、巻付部１５を、インフレーター２０の先端２０ａ側を挿入させた流入口部１２に巻き付け、ついで、インフレーター２０の元部２０ｂ側を、第２押圧部４５内に挿入させる。その後、押圧部３７，４５のカシメ部３８，４６をカシメて各縮径部３９，４７を支持部４１，４９側に接近させれば、インフレーター２０と、インフレーター２０の先端２０ａ側を挿入させた流入口部１２とが、押圧部３７，４５と支持部４１，４９とに挟持されて、保持板部３１に組み付けられるとともに、取付ベース３０に保持されて、エアバッグ装置９を組み立てることができる。なお、巻付部１５の端末１６は、カシメ部３８，４６をカシメた後、係止突起５９を係止孔１７に挿入させて、係止突起５９に係止させる。 Then, the inflow port portion 12 through which the insertion hole 35 is inserted is arranged on the inner peripheral side of the pressing portion 37 before crimping, and then the tip 20a side of the inflator 20 is inserted into the inflow port portion 12 to 15 is wound around the inlet portion 12 into which the tip 20 a side of the inflator 20 is inserted, and then the base portion 20 b side of the inflator 20 is inserted into the second pressing portion 45 . After that, the crimped portions 38 and 46 of the pressing portions 37 and 45 are crimped to bring the diameter-reduced portions 39 and 47 closer to the support portions 41 and 49, thereby inserting the inflator 20 and the tip 20a side of the inflator 20. The inflow port portion 12 is sandwiched between the pressing portions 37, 45 and the support portions 41, 49, assembled to the holding plate portion 31, and held by the mounting base 30, so that the airbag device 9 can be assembled. . After crimping the crimped portions 38 and 46 , the end 16 of the wound portion 15 is engaged with the locking projection 59 by inserting the locking projection 59 into the locking hole 17 .

また、巻付部１５の巻き付けとしては、予め、挿通孔３５と押圧部３７とを挿通させた流入口部１２に対して、ある程度、緩く、巻付部１５を巻き付けておき、そして、インフレーター２０の先端２０ａを、押圧部４５内を挿通させ、さらに、流入口部１２内に挿入させた後、端末１６を係止突起５９に係止させるとともに、カシメ部３８，４６をカシメるようにしてもよい。 In addition, as the winding of the winding portion 15, the winding portion 15 is somewhat loosely wound in advance around the inlet portion 12 through which the insertion hole 35 and the pressing portion 37 are inserted. is inserted through the pressing portion 45 and further into the inlet portion 12, the terminal 16 is locked to the locking projection 59, and the crimped portions 38 and 46 are crimped. good too.

エアバッグ装置９を組み立てた後には、インフレーター２０の元部２０ｂ側のコネクタ２４に、作動用信号線ＬＷを結線するとともに、取付ベース３０の取付ブラケット部５３（Ｌ，Ｒ）を、ボルト３とナット４とを利用して、ボディ１側のブラケット２に取り付ければ、エアバッグ装置９を、グラブボックス７の下方の所定の搭載部位に搭載することができる。 After the airbag device 9 is assembled, the actuation signal line LW is connected to the connector 24 on the side of the base portion 20b of the inflator 20, and the mounting bracket portion 53 (L, R) of the mounting base 30 is connected to the bolt 3. The airbag device 9 can be mounted on a predetermined mounting portion below the glove box 7 by mounting it on the bracket 2 on the side of the body 1 using the nut 4 .

エアバッグ装置９の搭載後、インフレーター２０が作動すれば、ガス吐出部２２のガス吐出口２２ａから膨張用ガスＧが吐出され、エアバッグ１０が、流入口部１２を経て流入された膨張用ガスＧにより、本体部１１を、展開膨張させ、エアバッグカバー７０の扉部７２Ｆ，７２Ｂを押し開いて、助手席の乗員の膝の前方側に、配置させることとなる。 After the airbag device 9 is mounted, when the inflator 20 operates, the inflation gas G is discharged from the gas discharge port 22a of the gas discharge portion 22, and the airbag 10 is filled with the inflation gas through the inlet portion 12. By G, the body portion 11 is deployed and inflated, the door portions 72F and 72B of the airbag cover 70 are pushed open, and placed in front of the knees of the occupant in the front passenger seat.

そして、実施形態のエアバッグ装置９では、折り畳んだエアバッグ１０の本体部１１から延びる流入口部１２を、取付ベース３０の保持板部３１の裏面３１ｂ側における押圧部３７，４５と支持部４１，４９との間に配置させるとともに、流入口部１２内にインフレーター２０の先端２０ａ側を挿入させ、そして、押圧部３７，４５のカシメ部３８，４６をカシメて塑性変形させれば、インフレーター２０の先端２０ａ側を挿入させたエアバッグ１０の流入口部１２が、カシメられた押圧部３７、４５と支持部４１，４９とに挟持されて、取付ベース３０に組み付けられて保持される。このような組付構造では、ボルトやナットを使用せずに、単に、流入口部１２の周囲に配置される押圧部３７，４５をカシメて塑性変形させるだけで、簡便に組み付けることができる。 In the airbag device 9 of the embodiment, the inflow port portion 12 extending from the body portion 11 of the folded airbag 10 is connected to the pressing portions 37 and 45 and the support portion 41 on the back surface 31b side of the holding plate portion 31 of the mounting base 30 . , 49, the tip 20a side of the inflator 20 is inserted into the inlet portion 12, and the crimped portions 38, 46 of the pressing portions 37, 45 are crimped to plastically deform the inflator 20. The inlet portion 12 of the airbag 10 into which the tip 20a side of the airbag 10 is inserted is sandwiched between the crimped pressing portions 37, 45 and the supporting portions 41, 49, and assembled and held on the mounting base 30. As shown in FIG. Such an assembly structure can be easily assembled simply by crimping and plastically deforming the pressing portions 37 and 45 arranged around the inlet portion 12 without using bolts or nuts.

したがって、実施形態のエアバッグ装置９では、構成部品点数を低減できて、軽量化を図ることができるとともに、単に、押圧部３７，４５をカシメるだけで、取付ベース３０に対してエアバッグ１０とインフレーター２０とを簡便に組み付けることができる。 Therefore, in the airbag device 9 of the embodiment, the number of constituent parts can be reduced, and the weight can be reduced. and the inflator 20 can be easily assembled.

そして、実施形態では、保持板部３１が、押圧部３７を、インフレーター２０の先端２０ａ側に配置させ、支持部４１を、インフレーター２０の軸心（軸方向）ＩＣに沿う方向で、押圧部３７からずれて配置させるとともに、インフレーター２０の軸心ＩＣに沿う方向で支持部４１を間にした押圧部３７から離れた位置に、インフレーター２０の軸心ＩＣ側に押圧するようにカシメて、インフレーター２０を支持部４１側に圧接させる第２の押圧部４５、を配設させて、構成されている。 In the embodiment, the holding plate portion 31 arranges the pressing portion 37 on the side of the distal end 20a of the inflator 20, and the support portion 41 is arranged in the direction along the axis (axial direction) IC of the inflator 20. The inflator 20 is displaced from the central axis IC of the inflator 20 and crimped to a position away from the pressing part 37 with the supporting part 41 therebetween in the direction along the central axis IC of the inflator 20 so as to press against the central IC side of the inflator 20. The second pressing portion 45 that presses against the support portion 41 side is provided.

そのため、実施形態では、インフレーター２０の軸方向に沿って、２箇所の押圧部３７，４５と１箇所の支持部４１との複数個所で、インフレーター２０とエアバッグ１０の流入口部１２とが支持されることから、安定して、インフレーター２０とエアバッグ１０の流入口部１２とが、取付ベース３０の保持板部３１に保持される。 Therefore, in the embodiment, the inflator 20 and the inlet portion 12 of the airbag 10 are supported at a plurality of locations, including the two pressing portions 37 and 45 and the one support portion 41, along the axial direction of the inflator 20. Therefore, the inflator 20 and the inlet portion 12 of the airbag 10 are stably held by the holding plate portion 31 of the mounting base 30 .

なお、上記の点を考慮せずに、流入口部１２を押圧部４５を越えるエリアまで延ばすような構成として、２箇所の支持部４１，４９と、支持部４１，４９間の１箇所の押圧部４５とにより、インフレーター２０とエアバッグ１０の流入口部１２とを保持するように構成してもよい。 In addition, without considering the above points, as a configuration in which the inlet portion 12 is extended to an area beyond the pressing portion 45, two supporting portions 41 and 49 and one pressing portion between the supporting portions 41 and 49 are configured. The portion 45 may be configured to hold the inflator 20 and the inlet portion 12 of the airbag 10 .

勿論、一つずつの押圧部３７と支持部４１とにより、インフレーター２０とエアバッグ１０の流入口部１２とを保持するように構成してもよい。この場合、インフレーター２０の軸心ＩＣに沿ってずらすこと無く、押圧部３７と支持部４１とを、インフレーター２０の先端２０ａ側に配置させて、１箇所ずつの押圧部３７と支持部４１とにより、インフレーター２０とインフレーター２０の先端２０ａ側を挿入させたエアバッグ１０の流入口部１２と、を挟持するように構成してもよい。このような場合の構成としては、板金素材をプレス加工せずに、別途、押圧部３７を、保持板部３１に対して、溶接等により固着させて、配設すればよい。 Of course, the inflator 20 and the inlet portion 12 of the airbag 10 may be held by one pressing portion 37 and one supporting portion 41 . In this case, the pressing portion 37 and the supporting portion 41 are arranged on the tip 20a side of the inflator 20 without being displaced along the axis IC of the inflator 20, and each pressing portion 37 and the supporting portion 41 , the inflator 20 and the inlet portion 12 of the airbag 10 into which the tip 20a side of the inflator 20 is inserted may be sandwiched. In such a case, the pressing portion 37 may be separately fixed to the holding plate portion 31 by welding or the like without pressing the sheet metal material.

また、実施形態では、エアバッグ１０が、インフレーター２０の先端２０ａ側を挿入させた流入口部１２の周囲を、インフレーター２０側に押圧するように巻き付け可能な巻付部１５、を、流入口部１２に、配設させて構成され、取付ベース３０若しくはインフレーター２０に（実施形態では取付ベース３０に）、巻付部１５の巻き付け状態を維持可能に、巻付部１５の端末１６に設けられた被係止部としての係止孔１７を係止する係止部としての係止突起５９が、配設されている。 Further, in the embodiment, the airbag 10 has a winding portion 15 that can be wound around the inlet portion 12 into which the tip 20a side of the inflator 20 is inserted so as to press it toward the inflator 20 side. 12, and is provided at the end 16 of the winding portion 15 on the mounting base 30 or the inflator 20 (on the mounting base 30 in the embodiment) so that the winding state of the winding portion 15 can be maintained. A locking protrusion 59 is provided as a locking portion for locking the locking hole 17 as a locked portion.

そのため、実施形態では、被係止部としての係止孔１７を設けた端末１６を周囲の係止部としての係止突起５９に係止させて、巻付部１５が解けを防止して巻付状態を維持すれば（図５参照）、この巻付部１５により、エアバッグ１０の流入口部１２が、インフレーター２０の外周面２１に押圧されることから、インフレーター２０の外周面２１に流入口部１２の内周面１２ｂ側が密着して良好なガスシール性を発揮し、押圧部３７と支持部４１とがインフレーター２０の外周面２１における周方向の全周を良好にシールできる構成でなくとも、的確に、膨張用ガスＧの漏れを防止できる。 Therefore, in the embodiment, the terminal 16 provided with the locking hole 17 as the locked portion is locked to the surrounding locking projection 59 as the locking portion, so that the winding portion 15 is prevented from unraveling. If the attached state is maintained (see FIG. 5), the inflow port portion 12 of the airbag 10 is pressed against the outer peripheral surface 21 of the inflator 20 by the wound portion 15, so that the air flows to the outer peripheral surface 21 of the inflator 20. The inner peripheral surface 12b side of the inlet portion 12 is in close contact with each other to exhibit a good gas sealing property, and the pressing portion 37 and the support portion 41 are not configured to satisfactorily seal the entire circumference of the outer peripheral surface 21 of the inflator 20 in the circumferential direction. In both cases, leakage of the inflation gas G can be prevented accurately.

なお、実施形態では、係止部としての係止突起５９を取付ベース３０側に設けたが、インフレーター２０の外周面２１側に、係止部としての係止突起５９を設けてもよい。 In the embodiment, the locking projection 59 as the locking portion is provided on the mounting base 30 side, but the locking projection 59 as the locking portion may be provided on the outer peripheral surface 21 side of the inflator 20 .

また、インフレーター２０の外周面２１側におけるガスシール性を良好にする場合には、図１０に示すエアバッグ装置９Ａのように構成してもよい。このエアバッグ装置９Ａでは、エアバッグ１０Ａが、流入口部１２Ａの内周面１２ｂ側に、インフレーター２０のガス吐出部２２から吐出される膨張用ガスＧの流入口部１２Ａ外への流出を防止可能に、流出する膨張用ガスＧの圧力によりインフレーター２０の外周面２１に密着する逆止弁用の可撓性を有したシート材１８、を配設させている。シート材１８は、ガス吐出部２２側の先端１８ａ側を、ガス吐出部２２から離れる元部１８ｂ側より、内径寸法を狭めるように、構成されている。 Further, in order to improve the gas sealing performance on the side of the outer peripheral surface 21 of the inflator 20, the airbag device 9A shown in FIG. 10 may be configured. In this airbag device 9A, the airbag 10A prevents the inflation gas G discharged from the gas discharge portion 22 of the inflator 20 from flowing out of the inlet portion 12A on the inner peripheral surface 12b side of the inlet portion 12A. A flexible sheet material 18 for use as a check valve, which is brought into close contact with the outer peripheral surface 21 of the inflator 20 by the pressure of the outflowing inflation gas G, is provided. The sheet material 18 is configured such that the tip 18 a side of the gas discharge section 22 has a narrower inner diameter than the base section 18 b side away from the gas discharge section 22 .

そのため、このエアバッグ装置９Ａでは、エアバッグ１０Ａの流入口部１２Ａの内周面１２ｂ側に、シート材１８からなる逆止弁１９が配設されており、押圧部３７と支持部４１とがインフレーター２０の外周面２１における周方向の全周を良好にシールできる構成でなくとも、流入口部１２Ａから流出しようとする膨張用ガスＧの圧力により、逆止弁１９を構成するシート材１８の先端１８ａから中間部１８ｃ付近が、図１０のＢ，Ｃに示すように、インフレーター２０の外周面２１に密着され、良好なガスシール性を発揮することから、的確に、膨張用ガスＧの漏れを防止できる。 Therefore, in this airbag device 9A, a check valve 19 made of a sheet material 18 is arranged on the inner peripheral surface 12b side of the inlet portion 12A of the airbag 10A, and the pressing portion 37 and the support portion 41 Even if the entire circumference of the outer peripheral surface 21 of the inflator 20 is not well sealed, the pressure of the inflation gas G that is about to flow out from the inflow port 12A causes the sheet material 18 that constitutes the check valve 19 to break. As shown in FIGS. 10B and 10C, the tip 18a to the intermediate portion 18c are in close contact with the outer peripheral surface 21 of the inflator 20, exhibiting a good gas sealing property, so that the inflation gas G can be properly prevented from leaking. can be prevented.

また、実施形態では、保持板部３１の支持部４１が、周囲の一般部４２から突出して、インフレーター２０の先端２０ａ側を挿入させた流入口部１２に圧接されるビード４３、を配設させて構成されている。 In addition, in the embodiment, the support portion 41 of the holding plate portion 31 is provided with a bead 43 that protrudes from the surrounding general portion 42 and is pressed against the inlet portion 12 into which the tip 20a side of the inflator 20 is inserted. configured as follows.

そのため、実施形態では、図５に示すように、圧接される流入口部１２の挟持部位１４が、狭いエリアとなって、位置ずれせずに一定位置となることから、エアバッグ装置９毎のインフレーター２０や流入口部１２の支持部４１による支持を、安定させることができる。 Therefore, in the embodiment, as shown in FIG. 5, the sandwiched portion 14 of the inflow port portion 12 to be pressure-contacted becomes a narrow area and stays in a fixed position without being displaced. The support by the support portion 41 of the inflator 20 and the inlet portion 12 can be stabilized.

なお、実施形態では、ビード４３として、インフレーター２０の軸心ＩＣ周りで離れて複数配設させ、かつ、インフレーター２０の軸心ＩＣに沿って、長く延びる配置としたが、図１１に示すエアバッグ装置９Ｂのように、取付ベース３０Ｂの保持板部３１Ｂに設けるビード４３Ｂを、インフレーター２０の外周面２１の周方向に沿って配置させれば、ビード４３Ｂを利用して、流入口部１２を、インフレーター２０の周方向に沿った外周面２１の下側２１ｂに圧接させることも可能となり、カシメる押圧部３７の縮径部３９における内周面３９ａの部位と協働して、流入口部１２のガスシール性を良好にすることもできる。 In the embodiment, a plurality of beads 43 are spaced apart around the axis IC of the inflator 20 and are arranged to extend along the axis IC of the inflator 20, but the airbag shown in FIG. If the bead 43B provided on the holding plate portion 31B of the mounting base 30B is arranged along the circumferential direction of the outer peripheral surface 21 of the inflator 20 as in the device 9B, the bead 43B can be used to open the inlet portion 12. It can also be pressed against the lower side 21 b of the outer peripheral surface 21 along the circumferential direction of the inflator 20 , and cooperates with the portion of the inner peripheral surface 39 a of the reduced diameter portion 39 of the pressing portion 37 to be crimped, and the inlet portion 12 It is also possible to improve the gas sealing performance of

なお、実施形態では、エアバッグ１０の流入口部１２に設けた巻付部１５を、支持座５１の前縁側に設けた係止突起５９に係止させて、巻付部１５の巻付状態を維持する場合を示したが、図１２に示すように、インフレーター２０の前方側の支持座５１に設けた係止部としての係止突起５９Ｃを、端末１６の係止孔１７に挿入させて、巻付部１５Ｃを係止突起５９Ｃに係止させて、巻付部１５Ｃの巻付状態を維持させてもよい。ちなみに、この係止突起５９Ｃは、支持座５１に設けたピンやボルト等から形成してもよいし、あるいは、図１３に示すように、支持座５１から切り起こして係止突起５９Ｄを形成してもよく、巻付部１５Ｄの端末１６の被係止部としての係止孔１７に、係止部としての係止突起５９Ｄを挿入させて、巻付部１５Ｄを係止突起５９Ｄに係止させ、そして、巻付部１５Ｄの巻付状態を維持するように構成してもよい。 In the embodiment, the winding portion 15 provided at the inflow port portion 12 of the airbag 10 is engaged with the locking projection 59 provided on the front edge side of the support seat 51, so that the winding state of the winding portion 15 is maintained. However, as shown in FIG. 12, the locking projection 59C as a locking portion provided on the support seat 51 on the front side of the inflator 20 is inserted into the locking hole 17 of the terminal 16. Alternatively, the winding portion 15C may be locked to the locking projection 59C to maintain the winding state of the winding portion 15C. Incidentally, this locking projection 59C may be formed from a pin, bolt, or the like provided on the support seat 51, or as shown in FIG. Alternatively, the locking projection 59D as a locking portion is inserted into the locking hole 17 as the locked portion of the terminal 16 of the winding portion 15D, and the winding portion 15D is locked to the locking projection 59D. and then the wound state of the winding portion 15D may be maintained.

また、実施形態では、助手席の乗員の膝を保護するための膝保護用のエアバッグ装置９について説明したが、エアバッグの流入口部にインフレーターを挿入させて、取付ベースに組み付けるエアバッグ装置であれば、膝保護用エアバッグ装置に限定されること無く、助手席の乗員の上半身を保護する助手席用エアバッグ装置等に、本発明を適用してもよい。 Also, in the embodiment, the knee-protecting airbag device 9 for protecting the knees of the occupant on the front passenger seat has been described, but the airbag device is assembled to the mounting base by inserting an inflator into the inflow port of the airbag. If so, the present invention is not limited to the knee protection airbag device, and may be applied to a front passenger seat airbag device that protects the upper half of the body of an occupant in the front passenger seat.

９，９Ａ，９Ｂ…（膝保護用）エアバッグ装置、１０，１０Ａ…エアバッグ、
１１…本体部、１２，１２Ａ…流入口部、１５，１５Ｃ，１５Ｄ…巻付部、１６…端末、１７…（被係止部）係止孔、１８…シート材、１９…逆止弁、２０…インフレーター、
２０ａ…先端、２１…外周面、２２…ガス吐出部、３０，３０Ｂ…取付ベース、
３１，３１Ｂ…保持板部、３７…押圧部、４１…支持部、４２…一般部、４３，４３Ｂ…ビード、４５…第２押圧部、４９…第２支持部、５９，５９Ｃ，５９Ｄ…（係止部）係止突起、ＩＣ…（インフレーターの）軸心、Ｇ…膨張用ガス。 9, 9A, 9B... (knee protection) airbag device, 10, 10A... airbag,
DESCRIPTION OF SYMBOLS 11... Main-body part 12, 12A... Inlet part 15, 15C, 15D... Winding part 16... Terminal, 17... (Located part) locking hole, 18... Sheet material, 19... Check valve, 20... Inflator,
20a...tip, 21...peripheral surface, 22...gas discharge portion, 30, 30B...mounting base,
31, 31B... Holding plate part, 37... Pressing part, 41... Supporting part, 42... General part, 43, 43B... Bead, 45... Second pressing part, 49... Second supporting part, 59, 59C, 59D... ( Locking portion) Locking protrusion, IC: axial center (of the inflator), G: inflation gas.

Claims

An airbag that is inflated by inflating an inflation gas, an inflator that supplies the inflation gas to the airbag, and a mounting base that holds the airbag and the inflator and is mounted on a mounting portion. An airbag device that is
The inflator has a substantially cylindrical shape with a gas discharge part for discharging inflation gas disposed on the tip side,
The airbag has a main body portion that is inflated by allowing inflation gas to flow into the airbag from a folded state, and a main body portion that communicates with the main body portion. a cylindrical inlet portion for flowing into the main body portion, the winding portion being capable of being wound so as to press the periphery of the inlet portion into which the tip side of the inflator is inserted toward the inflator; It is configured to be arranged in the part ,
The mounting base is made of sheet metal, and has a holding plate on which the folded main body portion is arranged on the front side, and on which the inlet portion and the inflator inserted into the inlet portion are arranged and held on the back side. has a part,
The holding plate portion has a pressing portion and a support portion which are arranged at offset positions around the axis of the inflator so as to surround the inlet portion into which the tip side of the inflator is inserted. Configuration and
The pressing part is crimped and configured to be plastically deformable so as to approach the supporting part side,
The front end side of the inflator inserted between the pressing portion and the support portion and the inlet portion of the airbag into which the front end side of the inflator is inserted are crimped to form the pressing portion and the support. It is configured to be sandwiched between and held by the mounting base ,
The mounting base or the inflator is provided with a locking portion that locks a locked portion provided at an end of the winding portion so that the wound state of the winding portion can be maintained. and airbag device.

The holding plate portion is
The pressing portion is arranged on the distal end side of the inflator, and the supporting portion is arranged in a direction along the axial center of the inflator so as to be displaced from the pressing portion, and the supporting portion is arranged in the direction along the axial center of the inflator. a second pressing portion that is crimped so as to press the inflator toward the axial center side of the inflator and presses the inflator against the supporting portion side at a position spaced apart from the pressing portion, and 2. The airbag device of claim 1, wherein the airbag device comprises:

The airbag is arranged on the inner peripheral side of the inflow port so as to prevent the inflating gas discharged from the gas discharge portion of the inflator from flowing out of the inflow port. 3. The airbag device according to claim 1, wherein a flexible sheet material for use as a check valve is disposed in close contact with the outer peripheral surface of the inflator.

The support portion of the holding plate portion is configured by arranging a bead that protrudes from the surrounding general portion and is pressed against the inlet portion into which the tip side of the inflator is inserted. The airbag device according to any one of claims 1 to 3 .