JP2021154941A

JP2021154941A - Airbag device

Info

Publication number: JP2021154941A
Application number: JP2020058916A
Authority: JP
Inventors: 稔大野; Minoru Ono; 哲也尾方; Tetsuya Ogata; 直紀堀田; Naoki Hotta
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2021-10-07
Anticipated expiration: 2040-03-27
Also published as: JP7205513B2

Abstract

To provide an airbag device configured so that an airbag and an inflator can be easily assembled to an attachment base, while securing gas sealability.SOLUTION: The airbag device comprises an attachment base 30 that is attached to a loading site while holding an airbag 10 and an inflator 25, and a bracket 50. The airbag comprises a cylindrical inflow port part 12 through which gas for inflation flows into a main body part 11, where fin parts 16 and 17 are provided in the inflow port part. The attachment base and the bracket comprise half-split cylindrical parts 33 and 53 that can cover the inflow port part of the airbag having the inflator inserted thereinto, and gripping parts 35, 55, 36 and 56 that can grip the fin parts of the airbag mutually. The gripping parts of the attachment base and of the bracket are overlapped to shape irregularities mutually and integrally while gripping the fin parts and are connected to each other by caulking joined parts 65 subjected to plastic deformation processing for forming undercut parts 66 which restrict mutual separation.SELECTED DRAWING: Figure 6

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、ガスシール性を確保しつつ、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。 The present invention relates to an airbag device mounted on a vehicle, and more particularly to an airbag device capable of easily assembling an airbag and an inflator to a mounting base while ensuring gas sealability.

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板金製の取付ベースとしてのケースと、エアバッグとインフレーターとをケースに取り付ける板金製のブラケットと、を備えて構成されていた（例えば、特許文献１参照）。インフレーターは、膨張用ガスを吐出する略円柱状とし、ブラケットは、インフレーターを保持する略円筒状としていた。ブラケットは、外周側に、エアバッグとケースとを貫通して、エアバッグとインフレーターとをケースに取り付けるための複数のボルトを突設させていた。このエアバッグ装置では、ボルトをエアバッグから突出させた状態で、エアバッグ内にブラケットを収納し、そして、エアバッグを折り畳み、ついで、ボルトを、ケースの底壁部の貫通孔を経て、ケース外に突出させつつ、エアバッグの折畳体をケース内に収納し、そして、ケースの側壁部から、エアバッグ内のブラケット内に、エアバッグの挿通孔を経て、インフレーターを挿入し、ついで、ケース外に突出しているボルトにナットを締結させることにより、ブラケットをケースの底壁部側に接近させ、筒状のブラケット内に挿入させたインフレーターをケースの底壁部側に圧接して、インフレーターをケースに取り付けるとともに、ブラケットとケース底壁部との間のエアバッグの部位を、ケースの底壁部側に押し付けて固定することにより、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, in an airbag device for knee protection, an airbag that inflows an expansion gas and expands from a folded state, an inflator that supplies the expansion gas to the airbag, and an airbag and an inflator are held. Then, it was configured to include a case as a sheet metal mounting base to be mounted on the mounting site, and a sheet metal bracket for mounting the airbag and the inflator to the case (see, for example, Patent Document 1). The inflator had a substantially cylindrical shape for discharging the expansion gas, and the bracket had a substantially cylindrical shape for holding the inflator. On the outer peripheral side of the bracket, a plurality of bolts for attaching the airbag and the inflator to the case were projected so as to penetrate the airbag and the case. In this airbag device, with the bolt protruding from the airbag, the bracket is stored in the airbag, the airbag is folded, and then the bolt is passed through the through hole in the bottom wall of the case to the case. The folded body of the airbag is stored in the case while protruding outward, and the inflator is inserted from the side wall of the case into the bracket inside the airbag through the insertion hole of the airbag, and then the inflator is inserted. By fastening the nut to the bolt protruding outside the case, the bracket is brought closer to the bottom wall side of the case, and the inflator inserted in the tubular bracket is pressed against the bottom wall side of the case, and the inflator Was attached to the case, and the inflator and the airbag were assembled to the case by pressing the portion of the airbag between the bracket and the bottom wall of the case against the bottom wall of the case to fix it.

特開２０１８−１６７７９６号公報JP-A-2018-167996

しかし、従来のエアバッグ装置では、インフレーターを、ケースの側壁部から、エアバッグの挿通孔を経て、エアバッグ内に収納されたブラケット内に、挿入させて配置させることから、エアバッグに設けられた挿通孔の周縁からの膨張用ガスの漏れ対策が必要となって、ガスシール性よく、インフレーターとエアバッグとを取付ベースとしてのケースに組み付ける点に課題があった。さらに、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, in the conventional airbag device, the inflator is inserted and arranged from the side wall of the case through the insertion hole of the airbag and into the bracket housed in the airbag, so that the inflator is provided in the airbag. It is necessary to take measures against leakage of expansion gas from the peripheral edge of the insertion hole, and there is a problem in that the gas sealability is good and the inflator and the airbag are assembled to the case as a mounting base. Furthermore, by using multiple bolts and nuts, the airbag and inflator are assembled to the case as the mounting base, which increases the number of parts, increases cost and weight, and further makes it possible to use multiple bolts. It was difficult to assemble easily because it was necessary to fasten the nuts.

本発明は、上述の課題を解決するものであり、エアバッグとインフレーターとを、ガスシール性を確保しつつ、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を提供することを目的とする。 The present invention solves the above-mentioned problems, and an object of the present invention is to provide an airbag device capable of easily assembling an airbag and an inflator to a mounting base while ensuring gas sealability.

本発明に係るエアバッグ装置では、
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板金製の取付ベースと、
前記インフレーターを前記取付ベースに取り付ける板金製のブラケットと、
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、可撓性を有したシート材から形成されて、
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、を備えるとともに、
前記流入口部の外周面側における前記流入口部の軸直交方向の両側に張り出すヒレ部、を備えて構成され、
前記取付ベースと前記ブラケットとが、
前記インフレーターを挿入させた前記エアバッグの略円柱状の流入口部の外周の略全周を包み可能に、前記流入口部の外周の略半周ずつを、それぞれ、覆い可能な断面略半割り円筒状の半割り筒部と、
前記エアバッグの前記流入口部の両側の前記ヒレ部を相互に挟持可能な板状の挟持部と、
を備え、
前記取付ベースと前記ブラケットとの前記挟持部が、前記流入口部の両側の前記ヒレ部を挟持した状態で、重ねて相互に一体的に凹凸を賦形しつつ、かつ、相互離脱を規制するアンダカット部を形成する塑性変形加工によるカシメ接合部により、相互に連結されていることを特徴とする。 In the airbag device according to the present invention,
A sheet metal mounting base that holds the airbag and the inflator and is mounted on the mounting site.
A sheet metal bracket that attaches the inflator to the mounting base,
It is an airbag device that is configured with
The inflator has a substantially cylindrical shape in which a gas discharge portion for discharging expansion gas is arranged on the tip side.
The airbag is formed of a flexible sheet material,
The main body that expands by inflowing expansion gas from the folded state,
It is provided with a cylindrical inflow port portion that communicates with the main body portion, inserts the tip end side of the inflator, and allows expansion gas from the inflator to flow into the main body portion.
It is configured to include fins protruding on both sides of the inflow port in the direction orthogonal to the axis on the outer peripheral surface side of the inflow port.
The mounting base and the bracket
Approximately half the circumference of the outer circumference of the air bag into which the inflator is inserted can be wrapped around the outer circumference of the substantially cylindrical inflow port portion, and approximately half the circumference of the outer circumference of the inflow port portion can be covered. Half-split cylinder and
A plate-shaped holding portion capable of mutually holding the fin portions on both sides of the inlet portion of the airbag, and a plate-shaped holding portion.
With
In a state where the sandwiching portion between the mounting base and the bracket sandwiches the fin portions on both sides of the inflow port portion, the fin portions are overlapped and integrally formed with each other, and mutual separation is regulated. It is characterized in that it is connected to each other by a caulking joint portion formed by plastic deformation processing to form an undercut portion.

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流入口部に、ガス吐出部側を先頭としてインフレーターを挿入し、ついで、インフレーターを挿入させた流入口部を取付ベースの半割り筒部に収納するとともに、流入口部の両側のヒレ部を、取付ベースの挟持部に載せる。そして、インフレーターを挿入させた流入口部に、ブラケットの半割り筒部を被せるように、載せつつ、流入口部の両側のヒレ部にも、ブラケットの挟持部を載せ、その状態で、取付ベースとブラケットとの挟持部相互に対し、凹凸を賦形しつつ、相互の離脱を規制するアンダカット部を形成する塑性変形加工して、取付ベースとブラケットとの挟持部相互にカシメ接合部を形成すれば、取付ベースとブラケットとの挟持部相互が連結されて、インフレーターとエアバッグとを取付ベースに組み付けることができる。すなわち、取付ベースとブラケットとの挟持部相互の接合により、インフレーターは、エアバッグの流入口部に挿入された状態で、取付ベースとブラケットとの半割り筒部相互に挟持されて、取付ベースに固定される。また、エアバッグの流入口部は、インフレーターを挿入させた状態で、取付ベースとブラケットとの半割り筒部の内周面相互に挟持されて、内周面の全周をインフレーターの外周面に圧接させた状態で、ガスシール性よく、インフレーターと接続される。勿論、エアバッグの本体部がインフレーターからの膨張用ガスにより膨張する際、流入口部の両側のヒレ部が、取付ベースとブラケットとの挟持部相互で挟持されることから、エアバッグの流入口部が、抜けたりせずに、強固に取付ベースに保持されることから、エアバッグは、取付ベースに安定して保持された状態で、本体部を展開膨張させることができる。 In the airbag device according to the present invention, an inflator is inserted into the inlet portion of the folded airbag with the gas discharge portion side at the head, and then the inlet portion into which the inflator is inserted is inserted into the half-split cylinder portion of the mounting base. While storing, place the fins on both sides of the inflow port on the holding part of the mounting base. Then, while mounting the inflator into which the inflator is inserted so as to cover the half-split cylinder of the bracket, the bracket holding portions are also mounted on the fins on both sides of the inflow port, and in that state, the mounting base Plastic deformation processing is performed to form an undercut portion that regulates mutual detachment while forming irregularities on the sandwiched portion between the bracket and the bracket, and a caulking joint is formed between the sandwiched portions between the mounting base and the bracket. Then, the holding portions of the mounting base and the bracket are connected to each other, and the inflator and the airbag can be assembled to the mounting base. That is, by joining the holding portions of the mounting base and the bracket to each other, the inflator is sandwiched between the half-split cylinders of the mounting base and the bracket in a state of being inserted into the inlet portion of the airbag, and becomes the mounting base. It is fixed. In addition, the inflow port of the airbag is sandwiched between the inner peripheral surfaces of the half-split cylinders of the mounting base and the bracket with the inflator inserted, and the entire circumference of the inner peripheral surface becomes the outer peripheral surface of the inflator. In the state of pressure contact, it has good gas sealing properties and is connected to the inflator. Of course, when the main body of the airbag expands due to the expansion gas from the inflator, the fins on both sides of the inflow port are sandwiched between the holding parts of the mounting base and the bracket, so that the inlet of the airbag Since the portion is firmly held by the mounting base without coming off, the airbag can be expanded and expanded while being stably held by the mounting base.

なお、このようなカシメ接合部を形成する塑性変形加工は、ランスロック（特開平６−２８１０１１号公報、特開２００６−３８１０５号公報、特開２０１９−１４３７１６号公報参照）やトックスカシメ（特開２００２−３１０１０９号公報参照）が例示できる。すなわち、これらの加工は、重ねた板金（鋼板）の加工予定部を、プレス型のホルダと押え型とで固定して、押え型を挿通するパンチを、凹ませるように加工予定部に当てて、重ねた板金を共に塑性変形させ、さらに、ホルダ側の可動押え型を開いて、パンチをホルダ側にさらに押し付けて、加工予定部を圧縮し、塑性変形部位にアンダカット部（係止突部）を形成し、アンダカット部を、塑性変形部位の対応する係止部に係止させる寸法に加工するものであって、所定のプレス型を利用して、簡便に行なえる。 The plastic deformation processing for forming such a caulking joint is performed by lance lock (see JP-A-6-281011, JP-A-2006-38105, JP-A-2019-143716) and Tox-caulking (see JP-A-2019-143716). 2002-310109 (see JP-A-2002-310109) can be exemplified. That is, in these processes, the planned processing portion of the stacked sheet metal (steel plate) is fixed by the press mold holder and the presser mold, and the punch through which the presser mold is inserted is applied to the scheduled machining portion so as to be recessed. , The stacked sheet metal is plastically deformed together, and the movable presser mold on the holder side is opened, the punch is further pressed against the holder side, the planned machining part is compressed, and the undercut part (locking protrusion) is placed on the plastically deformed part. ) Is formed, and the undercut portion is processed to a size that locks the undercut portion with the corresponding locking portion of the plastic deformation portion, which can be easily performed by using a predetermined press die.

したがって、本発明に係るエアバッグ装置では、エアバッグとインフレーターとを、ガスシール性を確保しつつ、簡便に取付ベースに組み付けることができる。 Therefore, in the airbag device according to the present invention, the airbag and the inflator can be easily assembled to the mounting base while ensuring the gas sealability.

そして、本発明に係るエアバッグ装置では、前記取付ベースと前記ブラケットとの前記挟持部相互のカシメ接合部が、ランスロックによる塑性変形加工により、形成されていてもよい。 Then, in the airbag device according to the present invention, the caulking joint between the holding portions of the mounting base and the bracket may be formed by plastic deformation processing by a lance lock.

すなわち、取付ベースとブラケットとの挟持部相互を結合させる塑性変形加工が、ランスロックとしていれば、加工時、取付ベースとブラケットとの挟持部やエアバッグのヒレ部における加工予定部（塑性変形部位）の両縁側に、一定の切断部位が生じることから、ヒレ部の加工予定部付近のシワ等が少なくなって、流入口部への影響を抑えることができて、良好なガスシール性を確保し易い。 That is, if the plastic deformation processing that connects the holding parts of the mounting base and the bracket to each other is a lance lock, the planned processing part (plastic deformation part) in the holding part between the mounting base and the bracket and the fin part of the airbag at the time of processing. ), Since a certain cutting part is generated on both edges, wrinkles near the planned processing part of the fin part are reduced, the influence on the inflow port part can be suppressed, and good gas sealing property is ensured. Easy to do.

また、本発明に係るエアバッグ装置では、前記ブラケットの前記半割り筒部の両側に、係止脚部が形成され、
該係止脚部が、それぞれ、
前記ブラケットの前記挟持部の挟持面と略直交するように、前記半割り筒部の両側の部位から突出して、前記取付ベースの前記挟持部と前記エアバッグの前記ヒレ部とに設けられた貫通孔を貫通する軸部と、
該軸部の先端から、前記ブラケットの前記半割り筒部から離れる方向に屈曲して、前記取付ベースの挟持部の裏面側の前記貫通孔の周縁を係止可能な係止爪と、
を備えて構成され、
前記取付ベースの前記挟持部と前記エアバッグの前記ヒレ部との前記貫通孔が、前記係止爪を挿通可能な広幅開口部と、前記半割り筒部の軸方向に沿う方向で前記広幅開口部に連なり、前記軸部を挿通可能で、前記係止爪を挿通不能とする細幅開口部と、を備えて構成され、
前記カシメ接合部が、前記ブラケットの前記係止脚部を、前記貫通孔の前記広幅開口部から前記細幅開口部に移動させた配置状態で、形成されている構成としてもよい。 Further, in the airbag device according to the present invention, locking legs are formed on both sides of the half-split cylinder portion of the bracket.
The locking legs are, respectively.
Penetration provided in the holding portion of the mounting base and the fin portion of the airbag so as to project from both side portions of the half-split cylinder portion so as to be substantially orthogonal to the holding surface of the holding portion of the bracket. The shaft that penetrates the hole and
A locking claw that can be bent from the tip of the shaft portion in a direction away from the half-split cylinder portion of the bracket to lock the peripheral edge of the through hole on the back surface side of the holding portion of the mounting base.
Is configured with
The through hole between the holding portion of the mounting base and the fin portion of the airbag has a wide opening through which the locking claw can be inserted and the wide opening in a direction along the axial direction of the half-split cylinder portion. It is configured to include a narrow opening that is connected to the portion, allows the shaft portion to be inserted, and prevents the locking claw from being inserted.
The caulking joint portion may be formed in a state in which the locking leg portion of the bracket is moved from the wide opening portion of the through hole to the narrow opening portion.

このような構成では、ブラケットの挟持部が、取付ベースの挟持部から離れようとしても、ブラケットの係止脚部が、係止爪を、取付ベースの挟持部の裏面側を係止することから、カシメ接合部が緩む等しても、ブラケットの挟持部における取付ベースの挟持部から剥がれるような挙動を的確に防止できて、取付ベースが、ガスシール性を確保して、エアバッグとインフレーターとを安定して保持することができる。 In such a configuration, even if the holding portion of the bracket tries to separate from the holding portion of the mounting base, the locking leg portion of the bracket locks the locking claw on the back surface side of the holding portion of the mounting base. Even if the caulking joint is loosened, the behavior of the bracket holding part from peeling off from the mounting base can be accurately prevented, and the mounting base ensures gas sealability, and the airbag and inflator Can be held stably.

本発明に係る第１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。It is a schematic vertical sectional view which shows the vehicle-mounted state of the airbag device for knee protection of 1st Embodiment which concerns on this invention. 第１実施形態のエアバッグ装置の上面側から見た概略斜視図である。It is a schematic perspective view seen from the upper surface side of the airbag device of 1st Embodiment. 第１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。It is a schematic vertical sectional view of the airbag device of 1st Embodiment, and is a schematic vertical sectional view along the left-right direction. 第１実施形態のエアバッグ装置の概略分解斜視図である。It is a schematic exploded perspective view of the airbag device of 1st Embodiment. 第１実施形態のエアバッグを平らに展開させた状態の平面図である。It is a top view of the state in which the airbag of 1st Embodiment is deployed flat. 第１実施形態のエアバッグ装置の概略縦断面図であり、図２のVI−VI部位付近に対応する。It is a schematic vertical sectional view of the airbag device of 1st Embodiment, and corresponds to the vicinity of the VI-VI part of FIG. 取付ベースとブラケットとの挟持部相互のカシメ接合部が、ランスロックにより、形成される状態を説明する図である。It is a figure explaining the state which the caulking joint part between the holding part of a mounting base and a bracket is formed by a lance lock. 第２実施形態のエアバッグ装置の概略斜視図である。It is the schematic perspective view of the airbag device of 2nd Embodiment. 第２実施形態のエアバッグ装置の概略分解斜視図である。It is a schematic exploded perspective view of the airbag device of 2nd Embodiment. 第２実施形態のエアバッグを平らに展開させた状態の平面図である。It is a top view of the state in which the airbag of the 2nd Embodiment is unfolded flat. 第２実施形態のエアバッグ装置の概略縦断面図であり、図８のXI−XI部位付近に対応する。It is a schematic vertical sectional view of the airbag device of 2nd Embodiment, and corresponds to the vicinity of the XI-XI part of FIG. 第２実施形態のエアバッグ装置の概略縦断面図であり、図８のXII−XII部位付近に対応する。It is a schematic vertical sectional view of the airbag device of 2nd Embodiment, and corresponds to the vicinity of the XII-XII part of FIG. 取付ベースとブラケットとの挟持部相互のカシメ接合部が、トックスカシメにより、形成される状態を説明する図である。It is a figure explaining the state which the caulking joint part between the holding part of a mounting base and a bracket is formed by tox caulking.

以下、本発明の一実施形態のエアバッグ装置を図面に基づいて説明すると、図１に示すように、第１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, the airbag device according to the embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the airbag device 9 according to the first embodiment is for knee protection and is in front of the passenger seat. It is mounted on the lower side of the instrument panel (appropriately abbreviated as instrument panel) 6, specifically, below the grab box 7 arranged on the lower side of the instrument panel 6. The grab box 7 includes a box main body 7a and a door portion 7b that closes the rear of the box main body 7a, and the door portion 7b is arranged so as to be openable so as to rotate the upper edge side rearward. Further, an undercover 8 is arranged below the grab box 7, and a door arrangement wall portion 71 of the airbag cover 70 described later in the airbag device 9 is arranged in the opening 8a of the undercover 8. , The airbag device 9 is mounted on the lower side in front of the passenger seat.

エアバッグ装置９は、図１〜６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Ｇ（図３参照）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を供給するインフレーター２５と、エアバッグ１０とインフレーター２５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、インフレーター２５を取付ベース３０に取り付けるブラケット５０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 6, the airbag device 9 inflows an expansion gas G (see FIG. 3) so as to protect the knees of an occupant seated in the passenger seat, and the airbag 10 expands from the folded state. The inflator 25 that supplies the expansion gas G to the airbag 10, the mounting base 30 that holds the airbag 10 and the inflator 25 and is mounted on the front lower side of the passenger seat as a mounting site, and the inflator 25 are mounted. It is configured to include a bracket 50 to be attached to the base 30 and an airbag cover 70 to cover the folded airbag 10 and be held by the attachment base 30.

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。ちなみに、図３，４では、上下を反転した状態での断面図と分解斜視図としている。 The front-back, up-down, and left-right directions in the present specification substantially correspond to the vehicle-mounted state, and as shown in FIGS. 1 to 3, the substantially rectangular holding plate of the mounting base 30. The long direction of the portion 31 will be the left-right direction, the short direction will be the front-back direction, and the orthogonal direction of the holding plate portion 31 will be the up-down direction. Incidentally, in FIGS. 3 and 4, a cross-sectional view and an exploded perspective view in a state of being turned upside down are shown.

エアバッグ１０は、図１，４，５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、端末の開口１５からインフレーター２５の先端２５ａ側を挿入させて、インフレーター２５からの膨張用ガスＧ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。 As shown in FIGS. 1, 4 and 5, the airbag 10 communicates with the main body 11 that expands by inflowing the expansion gas G from the folded state and the main body 11, and the inflator 25 is communicated with the opening 15 of the terminal. A tubular (cylindrical in the embodiment) inflow port portion 12 is provided so that the tip 25a side of the inflator 25a is inserted to allow the expansion gas G from the inflator 25 to flow into the main body portion 11.

さらに、エアバッグ１０は、流入口部１２の外周面１３側における流入口部１２の軸方向ＩＤと直交する軸直交方向ＶＤの両側に張り出すヒレ部１６，１７、を備えて構成されている。 Further, the airbag 10 is configured to include fin portions 16 and 17 projecting on both sides of an axially orthogonal direction VD orthogonal to the axial direction ID of the inflow port portion 12 on the outer peripheral surface 13 side of the inflow port portion 12. ..

なお、エアバッグ１０は、可撓性を有したポリアミド等の糸を織った織布からなるシート材（バッグ用基布）を二つ折りし、重ねた外周縁を縫合する縫合部１０ａ（図５参照）を設けて、本体部１１と流入口部１２とを形成している。 The airbag 10 is a suture portion 10a (FIG. 5) in which a sheet material (base cloth for a bag) made of a woven fabric woven with a flexible polyamide or other thread is folded in half and the overlapped outer peripheral edges are sewn together. (See) is provided to form the main body portion 11 and the inflow port portion 12.

また、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（内側面）３１ａ側におけるバッグ配置部３２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の後述する半割り筒部３３内に、外周面１３の半分の部位（ベース側）１３ａが、収納される。 Further, the main body 11 of the airbag 10 is arranged in the bag arrangement 32 on the surface (inner side surface) 31a side of the holding plate 31 described later of the mounting base 30 in a folded state, and the flow extends from the main body 11. In the inlet portion 12, a half portion (base side) 13a of the outer peripheral surface 13 is housed in the half-split cylinder portion 33 described later of the holding plate portion 31.

ヒレ部１６，１７は、流入口部１２の縫代１０ｂの部分として、保持板部３１の半割り筒部３３の両側の後述する挟持部３５，３６に配置されることとなる。また、ヒレ部１６，１７に二点鎖線で示す部位１８は、後述するカシメ接合部６５を形成することとなる加工予定部１８であり、第１実施形態の場合、カシメ接合部６５の数に対応して、ヒレ部１６に３個、ヒレ部１７に２個、配設されている。 The fin portions 16 and 17 are arranged as the seam allowance 10b of the inflow port portion 12 in the holding portions 35 and 36 described later on both sides of the half-split cylinder portion 33 of the holding plate portion 31. Further, the portion 18 indicated by the alternate long and short dash line on the fin portions 16 and 17 is a scheduled processing portion 18 for forming the caulking joint portion 65 described later, and in the case of the first embodiment, the number of the caulking joint portions 65 is increased. Correspondingly, three are arranged in the fin portion 16 and two are arranged in the fin portion 17.

インフレーター２５は、図２〜４，６に示すように、略円柱状として、先端２５ａに、膨張用ガスＧを吐出する複数のガス吐出口２７ａを設けたガス吐出部２７を配設させて構成されている。インフレーター２５の元部２５ｂ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２９が、配設される（図３参照）。 As shown in FIGS. Has been done. A connector 29 for connecting an operation signal line LW for inputting an operation signal is arranged on an end surface of the inflator 25 on the base portion 25b side (see FIG. 3).

取付ベース３０は、図２〜４，６に示すように、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、保持板部３１の左右両端には、車両のボディ１側から延びるブラケット２に取付固定される取付ブラケット部４２（Ｌ，Ｒ）が配設されて構成されている。 As shown in FIGS. 2 to 4 and 6, 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. Mounting bracket portions 42 (L, R) that are mounted and fixed to the bracket 2 extending from the above are arranged and configured.

保持板部３１は、表面（内側面）３１ａ側に、折り畳まれたエアバッグ１０の本体部１１側を配置させるバッグ配置部３２を配設させるとともに、前後方向の中央よりやや前部側に、インフレーター２５を挿入させたエアバッグ１０の流入口部１２を収納する半割り筒部３３が配設されている。 The holding plate portion 31 is provided with a bag arranging portion 32 for arranging the main body portion 11 side of the folded airbag 10 on the surface (inner side surface) 31a side, and is slightly forward side from the center in the front-rear direction. A half-split cylinder portion 33 for accommodating the inflow port portion 12 of the airbag 10 into which the inflator 25 is inserted is arranged.

半割り筒部３３は、流入口部１２の軸直交方向の略半分（車両搭載状態では上側半分）が収納され、内周面３３ａには、エアバッグ１０の流入口部１２の外周面１３における上側の略半周分のベース側１３ａが、圧接されるように、収納される。内周面３３ａには、流入口部１２の外周面１３への圧接時、流入口部１２の内周面１４を、インフレーター２５の本体部２６の外周面２６ａ側に、強く圧接させて、インフレーター２５を覆う流入口部１２のガスシール性をより高めるための複数のビード３３ｂが形成されている。また、半割り筒部３３の右端側には、インフレーター２５のコネクタ２９から延びる作動用信号線ＬＷを排出できるように、開口３３ｃが形成されて、構成されている。 Approximately half of the inflow port portion 12 in the direction orthogonal to the axis (upper half in the vehicle-mounted state) is housed in the half-split cylinder portion 33, and the inner peripheral surface 33a is the outer peripheral surface 13 of the inflow port portion 12 of the airbag 10. The base side 13a for approximately half the circumference of the upper side is stored so as to be pressure-welded. When the inner peripheral surface 33a is pressed against the outer peripheral surface 13 of the inflow port portion 12, the inner peripheral surface 14 of the inflow port portion 12 is strongly pressed against the outer peripheral surface 26a side of the main body portion 26 of the inflator 25 to form an inflator. A plurality of beads 33b are formed to further improve the gas sealing property of the inflow port portion 12 covering the 25. Further, an opening 33c is formed on the right end side of the half-split cylinder portion 33 so that the operation signal line LW extending from the connector 29 of the inflator 25 can be discharged.

また、保持板部３１の半割り筒部３３の前後両側には、エアバッグ１０の流入口部１２の両側のヒレ部１６，１７を載せる板状の挟持部３５，３６が配設されている。挟持部３５，３６にも、二点鎖線で示す部位３８として、後述するカシメ接合部６５を形成することとなる加工予定部３８が配置されている。すなわち、挟持部３５側には、３箇所のカシメ接合部６５に対応して、３箇所に加工予定部３８が配設され、挟持部３６側には、２箇所のカシメ接合部６５に対応して、２箇所に加工予定部３８が配設されている。 Further, on both front and rear sides of the half-split cylinder portion 33 of the holding plate portion 31, plate-shaped holding portions 35 and 36 on which the fin portions 16 and 17 on both sides of the inflow port portion 12 of the airbag 10 are placed are arranged. .. Also in the sandwiching portions 35 and 36, a scheduled processing portion 38 for forming a caulking joint portion 65, which will be described later, is arranged as a portion 38 indicated by the alternate long and short dash line. That is, on the sandwiching portion 35 side, corresponding to the three caulking joints 65, the scheduled processing portions 38 are arranged at three locations, and on the sandwiching portion 36 side, the two caulking joints 65 correspond. The planned processing portions 38 are arranged at two locations.

保持板部３１における挟持部３５，３６を越えた前後の縁側には、エアバッグカバー７０の後述する連結凸部７６を挿入させて連結保持する複数の連結凹部４５が、開口されている。 A plurality of connecting recesses 45, which are connected and held by inserting a connecting convex portion 76, which will be described later, of the airbag cover 70, are opened on the front and rear edge sides of the holding plate portion 31 beyond the holding portions 35 and 36.

さらに、保持板部３１の左右両側の取付ブラケット部４２（Ｌ，Ｒ）には、取付孔４２ａが貫通されている。そして、各取付ブラケット部４２（Ｌ，Ｒ）は、取付孔４２ａを貫通するボルト３（図１の二点鎖線参照）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となる。 Further, mounting holes 42a are penetrated through the mounting bracket portions 42 (L, R) on both the left and right sides of the holding plate portion 31. Then, each mounting bracket portion 42 (L, R) has an airbag device 9 by fixing a bolt 3 (see the two-dot chain line in FIG. 1) penetrating the mounting hole 42a to the bracket 2 on the body 1 side with a nut 4. Will be mounted on the lower front side of the passenger seat below the grab box 7.

エアバッグカバー７０は、図１〜４，６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４５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. It is configured to include connecting wall portions 75 (F, B) extending upward from the edge. A thin-walled planned rupture portion 73 along the left-right direction is disposed on the door arrangement wall portion 71, and when the main body portion 11 of the airbag 10 expands, the planned rupture portion 73 is ruptured and the door opens on both front and rear sides. Parts 72 (F, B) are arranged. The front and rear connecting wall portions 75 (F, B) are provided with a plurality of connecting convex portions 76 that are inserted and locked into the connecting concave portions 45 of the mounting base 30 at the upper ends.

ブラケット５０は、取付ベース３０と同様に、板金製として、半割り円筒状の半割り筒部５３と、半割り筒部５３から前後両側に延びる平板状の挟持部５５，５６と、を備えて構成されている。 Like the mounting base 30, the bracket 50 is made of sheet metal and includes a half-split cylindrical half-split cylinder portion 53 and flat plate-shaped holding portions 55 and 56 extending from the half-split cylinder portion 53 to both front and rear sides. It is configured.

半割り筒部５３は、インフレーター２５を挿入させたエアバッグ１０の流入口部１２の軸直交方向の略下側半分（車両搭載状態では下側となる）を覆い、かつ、流入口部１２の外周面１３の下面側（ブラケット側）１３ｂに、内周面５３ａを圧接可能とした湾曲形状、としている。そして、内周面５３ａには、流入口部１２の外周面１３への圧接時、流入口部１２の内周面１４を、インフレーター２５の本体部２６の外周面２６ａに、強く圧接させて、インフレーター２５を覆う流入口部１２のガスシール性をより高めるための複数のビード５３ｂが形成されている。 The half-split cylinder portion 53 covers substantially the lower half of the inlet portion 12 of the airbag 10 into which the inflator 25 is inserted in the direction orthogonal to the axis (it is the lower side when mounted on a vehicle), and the inflow port portion 12 The inner peripheral surface 53a has a curved shape that can be pressure-welded to the lower surface side (bracket side) 13b of the outer peripheral surface 13. Then, when the inflow port portion 12 is pressed against the outer peripheral surface 13 of the inner peripheral surface 53a, the inner peripheral surface 14 of the inflow port portion 12 is strongly pressed against the outer peripheral surface 26a of the main body portion 26 of the inflator 25. A plurality of beads 53b are formed to further improve the gas sealing property of the inflow port portion 12 covering the inflator 25.

また、挟持部５５，５６にも、二点鎖線で示すように、後述するカシメ接合部６５を形成することとなる加工予定部５８が配置されている。第１実施形態の場合、挟持部５５，５６は、加工予定部５８毎にスペース５７を空けて分断されるように配設されており、加工予定部５８（カシメ接合部６５）の数に対応して、ブラケット５０の前縁側に、３個の挟持部５５が配設され、ブラケット５０の後縁側に、２個の挟持部５６が配設されている。 Further, as shown by the alternate long and short dash line, the sandwiching portions 55 and 56 are also provided with the scheduled machining portions 58 for forming the caulking joint portion 65, which will be described later. In the case of the first embodiment, the sandwiching portions 55 and 56 are arranged so as to be divided by leaving a space 57 for each scheduled machining portion 58, and corresponds to the number of scheduled machining portions 58 (caulking joint portion 65). Then, three holding portions 55 are arranged on the front edge side of the bracket 50, and two holding portions 56 are arranged on the rear edge side of the bracket 50.

そして、第１実施形態のカシメ接合部６５は、ランスロックにより形成されている。ランスロックは、図７のＡ，Ｂに二点鎖線で示すプレス型１００を利用して行なうものであり、その加工時には、例えば、ヒレ部１６側では（ヒレ部１７側でも同様である）、図７のＡに示すように、ヒレ部１６を間にして重ねた挟持部３５，５５の加工予定部３８，５８，１８を、プレス型１００のホルダ１０１側の可動押え型１０２と押え型１０４とで固定して、ついで、図７のＢに示すように、押え型１０４を挿通するパンチ１０３を、凹ませるように加工予定部３８，５８，１８に当てて、重ねた挟持部３５，５５を共に塑性変形させ、さらに、ホルダ１０１側の可動押え型１０２を開いて、パンチ１０３をホルダ１０１側にさらに押し付けて、加工予定部３８，５８，１８を圧縮変形させ、凹ませた側の塑性変形部位６５ａに、アンダカット部（係止突部）６６を形成して、アンダカット部６６を、凹ませない側の塑性変形部位６５ｂの対応する係止部６７に係止させる寸法に加工するものである。 The caulking joint portion 65 of the first embodiment is formed by a lance lock. The lance lock is performed by using the press mold 100 shown by the alternate long and short dash line in FIGS. 7A and 7, and at the time of processing, for example, on the fin portion 16 side (the same applies to the fin portion 17 side). As shown in A of FIG. 7, the scheduled machining portions 38, 58, 18 of the holding portions 35, 55, which are overlapped with the fin portions 16 in between, are formed by the movable presser die 102 and the presser die 104 on the holder 101 side of the press die 100. Then, as shown in B of FIG. 7, the punch 103 through which the pressing die 104 is inserted is applied to the planned processing portions 38, 58, 18 so as to be recessed, and the overlapping holding portions 35, 55. The movable retainer 102 on the holder 101 side is opened, and the punch 103 is further pressed against the holder 101 to compress and deform the planned machining portions 38, 58, 18 and the plasticity on the recessed side. An undercut portion (locking protrusion) 66 is formed at the deformed portion 65a, and the undercut portion 66 is processed to a size that locks the undercut portion 66 with the corresponding locking portion 67 of the plastic deformation portion 65b on the non-recessed side. It is a thing.

そして、ランスロックによるカシメ接合部６５は、挟持部３５，５５とヒレ部１８を剪断させるようにずらして、すなわち、係止部６７側からアンダカット部６６側を剪断させるようにずらしていることから、塑性変形部位６５ａの両縁には、破断面（剪断面）６８が形成されている。 The caulking joint portion 65 by the lance lock is shifted so that the holding portions 35, 55 and the fin portion 18 are sheared, that is, the undercut portion 66 side is sheared from the locking portion 67 side. Therefore, fracture surfaces (shear surfaces) 68 are formed on both edges of the plastic deformation portion 65a.

このようなカシメ接合部６５は、エアバッグ１０のヒレ部１７側に、２個配設され、本体部１１から離れる側のヒレ部１６側には、本体部１１の膨張時の引張強度を高めるために、ヒレ部１７側より数を多くして、３個配設されている。 Two such caulking joints 65 are arranged on the fin portion 17 side of the airbag 10, and on the fin portion 16 side on the side away from the main body portion 11, the tensile strength of the main body portion 11 during expansion is increased. Therefore, the number is increased from the fin portion 17 side, and three are arranged.

第１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の流入口部１２に、ガス吐出部２７側からインフレーター２５を挿入する。そして、折り畳んだエアバッグ１０の本体部１１を取付ベース３０のバッグ配置部３２に配置させつつ、インフレーター２５を挿入したエアバッグ１０の流入口部１２を、取付ベース３０の保持板部３１の半割り筒部３３内に収納するとともに、取付ベース３０の挟持部３５，３６上に、展開させたヒレ部１６，１７を載せる。ついで、ブラケット５０の半割り筒部５３を、インフレーター２５を挿入したエアバッグ１０の流入口部１２に被せ、また、ブラケット５０の各挟持部５５，５６を、エアバッグ１０のヒレ部１６，１７の対応部位に重ねて、その状態で、プレス型１００にセットして、重ねた加工予定部５８，１８，３８を、ランスロックにより、塑性変形加工して、加工予定部５８，１８，３８にカシメ接合部６５を形成すれば、ヒレ部１６，１７を挟持した状態の取付ベース３０とブラケット５０の挟持部３５，５５相互と挟持部３６，５６相互とが接合されて、インフレーター２５とエアバッグ１０とが、ガスシール性よく、取付ベース３０に組み付けられることとなり、エアバッグ装置９を組み立てることができる。そして、エアバッグ装置９を組み立てた後には、インフレーター２５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４２（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。 Explaining the assembly work of the airbag device 9 of the first embodiment, first, the main body 11 of the airbag 10 is folded and wrapped with a wrapping material (not shown) for preventing folding. Then, the inflator 25 is inserted into the inflow port portion 12 of the airbag 10 from the gas discharge portion 27 side. Then, while arranging the main body 11 of the folded airbag 10 on the bag arranging portion 32 of the mounting base 30, the inflow port portion 12 of the airbag 10 into which the inflator 25 is inserted is half of the holding plate portion 31 of the mounting base 30. It is housed in the split cylinder portion 33, and the expanded fin portions 16 and 17 are placed on the holding portions 35 and 36 of the mounting base 30. Next, the half-split cylinder portion 53 of the bracket 50 is put on the inflow port portion 12 of the airbag 10 into which the inflator 25 is inserted, and the holding portions 55 and 56 of the bracket 50 are covered with the fin portions 16 and 17 of the airbag 10. In that state, it is set on the press mold 100, and the overlapped scheduled machining portions 58, 18, 38 are plastically deformed by the lance lock to form the scheduled machining portions 58, 18, 38. When the caulking joint portion 65 is formed, the mounting base 30 in which the fin portions 16 and 17 are sandwiched, the sandwiching portions 35 and 55 of the bracket 50 and the sandwiching portions 36 and 56 are joined to each other, and the inflator 25 and the airbag are joined. The airbag device 9 can be assembled because the 10 and the 10 have good gas sealing properties and are assembled to the mounting base 30. Then, after assembling the airbag device 9, the operation signal line LW is connected to the connector 24 on the base portion 20b side of the inflator 25, and the mounting bracket portions 42 (L, R) of the mounting base 30 are bolted. If the airbag device 9 is attached to the bracket 2 on the body 1 side by using the 3 and the nut 4, the airbag device 9 can be mounted on a predetermined mounting portion below the grab box 7.

エアバッグ装置９の搭載後、インフレーター２５が作動すれば、ガス吐出部２７のガス吐出口２７ａ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。 If the inflator 25 is activated after the airbag device 9 is mounted, the expansion gas G is discharged from the gas discharge port 27a of the gas discharge unit 27, and the airbag 10 is the expansion gas that has flowed in through the inflow port portion 12. The main body 11 is expanded and expanded by G, and the doors 72F and 72B of the airbag cover 70 are pushed open to be arranged on the front side of the knee of the passenger in the passenger seat.

そして、第１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の流入口部１２に、ガス吐出部２７側を先頭としてインフレーター２５を挿入し、ついで、インフレーター２５を挿入させた流入口部１２を取付ベース３０の半割り筒部３３に収納するとともに、流入口部１２の両側のヒレ部１６，１７を、取付ベース３０の挟持部３５，３６に載せて、さらに、インフレーター２５を挿入させた流入口部１２に、ブラケット５０の半割り筒部５３を被せるように、載せつつ、流入口部１２の両側のヒレ部１６，１７にも、ブラケット５０の挟持部５５，５６を載せ、その状態で、取付ベース３０とブラケット５０との挟持部３５，５５相互と挟持部３６，５６相互とに対し、凹凸を賦形しつつ、相互の離脱を規制するアンダカット部６６を形成する塑性変形加工としてのランスロックを行なって、取付ベース３０とブラケット５０との挟持部３５，５５相互と挟持部３６，５６相互とに、カシメ接合部６５を形成すれば、取付ベース３０とブラケット５０との挟持部３５，５５相互や挟持部３６，５６相互が連結されて、インフレーター２５とエアバッグ１０とを取付ベース３０に組み付けることができる。 Then, in the airbag device 9 of the first embodiment, the inflator 25 is inserted into the inflow port portion 12 of the folded airbag 10 with the gas discharge portion 27 side at the head, and then the inflator portion 25 into which the inflator 25 is inserted. 12 is housed in the half-split cylinder portion 33 of the mounting base 30, and the fin portions 16 and 17 on both sides of the inflow port portion 12 are placed on the holding portions 35 and 36 of the mounting base 30, and the inflator 25 is further inserted. While mounting the inflow port portion 12 so as to cover the half-split cylinder portion 53 of the bracket 50, the holding portions 55 and 56 of the bracket 50 are also mounted on the fin portions 16 and 17 on both sides of the inflow port portion 12. In this state, plastic deformation that forms an undercut portion 66 that regulates mutual detachment while forming irregularities on the sandwiching portions 35, 55 of the mounting base 30 and the bracket 50 and the sandwiching portions 36, 56 of each other. If lance lock is performed as a process to form a caulking joint 65 between the holding portions 35, 55 between the mounting base 30 and the bracket 50 and between the holding portions 36, 56, the mounting base 30 and the bracket 50 can be connected. The sandwiching portions 35, 55 and the sandwiching portions 36, 56 are connected to each other, and the inflator 25 and the airbag 10 can be assembled to the mounting base 30.

すなわち、第１実施形態では、取付ベース３０とブラケット５０との挟持部３５，５５相互と挟持部３６，５６相互との接合により、インフレーター２５は、エアバッグ１０の流入口部１２に挿入された状態で、取付ベース３０とブラケット５０との半割り筒部３３，５３相互に挟持されて、取付ベース３０に固定される。また、エアバッグ１０の流入口部１２は、インフレーター２５を挿入させた状態で、取付ベース３０とブラケット５０との半割り筒部３３，５３の内周面３３ａ，５３ａ相互に挟持されて、内周面１４の全周をインフレーター２５の外周面２６ａに圧接させた状態で、ガスシール性よく、インフレーター２５と接続される。勿論、エアバッグ１０の本体部１１がインフレーター２５からの膨張用ガスＧにより膨張する際、流入口部１２の両側のヒレ部１６，１７が、取付ベース３０とブラケット５０との挟持部３５，３６，５５，５６相互で挟持されることから、エアバッグ１０の流入口部１２が、抜けたりせずに、強固に取付ベース３０に保持されることから、エアバッグ１０は、取付ベース３０に安定して保持された状態で、本体部１１を展開膨張させることができる。 That is, in the first embodiment, the inflator 25 is inserted into the inflow port portion 12 of the airbag 10 by joining the sandwiching portions 35, 55 of the mounting base 30 and the bracket 50 to each other and the sandwiching portions 36, 56 to each other. In this state, the mounting base 30 and the bracket 50 are sandwiched between the half-split cylinder portions 33 and 53 and fixed to the mounting base 30. Further, the inflow port portion 12 of the airbag 10 is sandwiched between the inner peripheral surfaces 33a and 53a of the half-split cylinder portions 33 and 53 of the mounting base 30 and the bracket 50 with the inflator 25 inserted, and is inside. In a state where the entire circumference of the peripheral surface 14 is in pressure contact with the outer peripheral surface 26a of the inflator 25, the peripheral surface 14 is connected to the inflator 25 with good gas sealing property. Of course, when the main body 11 of the airbag 10 is expanded by the expansion gas G from the inflator 25, the fins 16 and 17 on both sides of the inflow port 12 are the holding portions 35 and 36 between the mounting base 30 and the bracket 50. , 55, 56 are sandwiched between each other, so that the inlet portion 12 of the airbag 10 is firmly held by the mounting base 30 without coming off, so that the airbag 10 is stable to the mounting base 30. The main body 11 can be expanded and expanded while being held.

さらに、カシメ接合部６５を形成する塑性変形加工は、既述したように、例えば、ヒレ部１６側（ヒレ部１７側でも同様である）では、図７のＡに示すように、ヒレ部１６を間にして重ねた挟持部３５，５５の加工予定部３８，５８，１８を、プレス型１００のホルダ１０１の可動押え型１０２と押え型１０４とで固定して、ついで、図７のＢに示すように、押え型１０４を挿通するパンチ１０３を、凹ませるように加工予定部３８，５８，１８に当てて、さらに、ホルダ１０１側の可動押え型１０２を開いて、パンチ１０３をホルダ１０１側にさらに押し付けて、加工予定部３８，５８，１８を圧縮変形させて延伸させ、凹ませた側の塑性変形部位６５ａに、アンダカット部（係止突部）６６を形成し、アンダカット部６６を、凹ませない側の塑性変形部位６５ｂの対応する係止部６７に係止させる寸法に加工するものであり、プレス型１００を使用した一度のプレス加工により、加工予定部３８，５８，１８の合計５箇所の部位を、同時に加工できて、簡便に、エアバッグ１０とインフレーター２５とを取付ベース３０に組み付けることができる。 Further, as described above, in the plastic deformation processing for forming the caulking joint portion 65, for example, on the fin portion 16 side (the same applies to the fin portion 17 side), as shown in A of FIG. 7, the fin portion 16 is formed. The planned processing portions 38, 58, 18 of the holding portions 35, 55, which are overlapped with each other, are fixed by the movable presser mold 102 and the presser mold 104 of the holder 101 of the press mold 100, and then in B of FIG. As shown, the punch 103 through which the presser die 104 is inserted is applied to the planned machining portions 38, 58, 18 so as to be recessed, and the movable presser die 102 on the holder 101 side is further opened to push the punch 103 to the holder 101 side. The planned machining portions 38, 58, 18 are further pressed against the surface to be stretched by compression deformation, and an undercut portion (locking protrusion) 66 is formed at the plastic deformation portion 65a on the recessed side, and the undercut portion 66 is formed. Is processed to a size that locks it to the corresponding locking portion 67 of the plastic deformation portion 65b on the non-recessed side, and the scheduled machining portions 38, 58, 18 are processed by one press working using the press die 100. A total of 5 parts can be processed at the same time, and the airbag 10 and the inflator 25 can be easily assembled to the mounting base 30.

したがって、第１実施形態のエアバッグ装置９では、エアバッグ１０とインフレーター２５とを、ガスシール性を確保しつつ、簡便に取付ベース３０に組み付けることができる。 Therefore, in the airbag device 9 of the first embodiment, the airbag 10 and the inflator 25 can be easily assembled to the mounting base 30 while ensuring the gas sealability.

そして、第１実施形態では、取付ベース３０とブラケット５０との挟持部３５，５５相互と挟持部３６，５６相互とのカシメ接合部６５が、ランスロックによる塑性変形加工により、形成されている。 Then, in the first embodiment, the caulking joints 65 between the holding portions 35, 55 of the mounting base 30 and the bracket 50 and the holding portions 36, 56 are formed by plastic deformation processing by a lance lock.

このようなランスロックでは、加工時、図７のＢに示すように、取付ベース３０とブラケット５０との挟持部３５，３６，５５，５６やエアバッグ１０のヒレ部１６，１７の加工予定部３８，５８，１８の両縁側に、一定の切断部位としての破断面（剪断面）６８が生じることから、ヒレ部１６，１７の加工予定部１８付近のシワ等が少なくなって、流入口部１２への影響を抑えることができて、良好なガスシール性を確保し易い。ちなみに、第１実施形態では、塑性変形部位６５ａ，６５ｂの両縁側の破断面６８，６８は、エアバッグ１０の円筒状の流入口部１２やインフレーター２５の軸方向ＩＤと直交する軸直交方向ＶＤに沿って、並設されており、破断面６８自体は、軸方向ＩＤに沿って配設されている。 In such a lance lock, as shown in B of FIG. 7, during machining, the sandwiching portions 35, 36, 55, 56 between the mounting base 30 and the bracket 50 and the fin portions 16, 17 of the airbag 10 are scheduled to be machined. Since a fracture surface (shear section) 68 as a constant cutting site is generated on both edges of 38, 58, and 18, wrinkles and the like near the planned processing portion 18 of the fin portions 16 and 17 are reduced, and the inflow port portion. The influence on 12 can be suppressed, and it is easy to secure good gas sealability. Incidentally, in the first embodiment, the fracture surfaces 68 and 68 on both edge sides of the plastic deformation portions 65a and 65b are axially orthogonal VDs orthogonal to the axial direction IDs of the cylindrical inflow port portion 12 of the airbag 10 and the inflator 25. The fracture surface 68 itself is arranged along the axial ID.

なお、第１実施形態では、ブラケット５０の挟持部５５，５６を、スペース５７を空けて、各加工予定部５８毎に、分断させた場合をしめしたが、スペース５７を空けずに、一枚の板状の挟持部５５，５６として、それぞれに、カシメ接合部６５を形成するための複数の加工予定部５８を配設してもよい。ちなみに、このような連続する一枚状の挟持部５５，５６では、各加工予定部３８毎に分断していない一枚状の取付ベース３０の挟持部３５，３６を使用する場合、エアバッグ１０の一枚状の各ヒレ部１６，１７付近のシワの発生を防止するために、ヒレ部１６，１７におけるカシメ接合部６５の領域に、ヒレ部１６，１７自体が介在されないように、開口を設けてもよい。この場合では、その開口周縁が、ブラケット５０と取付ベース３０との挟持部５５，３５相互や挟持部５６，３６相互の連結により、それらの挟持部５５，３５相互の近傍付近や挟持部５６，３６相互の近傍付近で、直接的に挟持されることから、ヒレ部１６，１７に生ずるシワの発生を抑えて、シール性よく、流入口部１２をインフレーター２５と接続させることができる。 In the first embodiment, the holding portions 55 and 56 of the bracket 50 are divided into each scheduled processing portion 58 by leaving a space 57, but one sheet is used without leaving a space 57. As the plate-shaped sandwiching portions 55 and 56 of the above, a plurality of scheduled machining portions 58 for forming the caulking joint portion 65 may be arranged in each of the plate-shaped sandwiching portions 55 and 56. By the way, in such continuous single-piece sandwiching portions 55 and 56, when the sandwiching portions 35 and 36 of the single-sheet mounting base 30 which are not divided for each scheduled processing portion 38 are used, the airbag 10 In order to prevent the occurrence of wrinkles near each of the single fin portions 16 and 17, an opening is provided so that the fin portions 16 and 17 themselves are not interposed in the region of the caulking joint portion 65 in the fin portions 16 and 17. It may be provided. In this case, the opening peripheral edge is connected to the holding portions 55, 35 of the bracket 50 and the mounting base 30 and to each other of the holding portions 56, 36, so that the holding portions 55, 35 are in the vicinity of each other or the holding portion 56, Since the 36s are directly sandwiched in the vicinity of each other, wrinkles generated in the fin portions 16 and 17 can be suppressed, and the inflow port portion 12 can be connected to the inflator 25 with good sealing performance.

また、挟持部３５，５５相互と挟持部３６，５６相互の接合状態を安定させるために、図８〜１２に示す第２実施形態のエアバッグ装置９Ａのように構成してもよい。 Further, in order to stabilize the joint state between the sandwiching portions 35, 55 and the sandwiching portions 36, 56, the airbag device 9A of the second embodiment shown in FIGS. 8 to 12 may be configured.

このエアバッグ装置９Ａでは、板金製のブラケット５０Ａが、第１実施形態のブラケット５０と相違して、半割り筒部５３の両側に、二つずつの係止脚部６０が、形成されて、加工予定部５８を配設する挟持部５５Ａ，５６Ａが、左右の係止脚部６０，６０の間に、配設されている点が異なっている。 In this airbag device 9A, unlike the bracket 50 of the first embodiment, the bracket 50A made of sheet metal has two locking legs 60 formed on both sides of the half-split cylinder portion 53. The difference is that the holding portions 55A and 56A on which the scheduled processing portion 58 is arranged are arranged between the left and right locking leg portions 60 and 60.

係止脚部６０は、挟持部５５Ａ．５６Ａにおける取付ベース３０Ａ側の挟持面５５ａ，５６ａと略直交するように突出して、取付ベース３０Ａの挟持部３５Ａ，３６Ａとエアバッグ１０Ａのヒレ部１６Ａ，１７Ａとに設けられた貫通孔４０，２０を貫通する軸部６１と、軸部６１の先端から、半割り筒部５３から離れる方向で屈曲して、取付ベース３０Ａの挟持部３５Ａ，３６Ａの裏面（挟持面３５ａ，３６ａの裏側面）３５ｂ，３６ｂ側の貫通孔４０の周縁を係止可能な係止爪６２と、を備えている。 The locking leg portion 60 has a holding portion 55A. Through holes 40, 20 provided in the holding portions 35A, 36A of the mounting base 30A and the fin portions 16A, 17A of the airbag 10A, projecting so as to be substantially orthogonal to the holding surfaces 55a, 56a on the mounting base 30A side of the 56A. The shaft portion 61 penetrating the shaft portion 61 and the tip of the shaft portion 61 are bent in a direction away from the half-split cylinder portion 53, and the back surfaces of the holding portions 35A and 36A of the mounting base 30A (the back surfaces of the holding surfaces 35a and 36a) 35b. , A locking claw 62 capable of locking the peripheral edge of the through hole 40 on the 36b side.

また、エアバッグ１０Ａは、第１実施形態のエアバッグ１０と相違して、ヒレ部１６Ａ，１７Ａの加工予定部１８の左右両側に、貫通孔２０が形成されている点が異なっている。また、取付ベース３０Ａも、第１実施形態の取付ベース３０と相違して、挟持部３５Ａ，３６Ａの加工予定部３８の左右両側に、貫通孔４０が形成されている点が異なっている。 Further, the airbag 10A is different from the airbag 10 of the first embodiment in that through holes 20 are formed on both the left and right sides of the scheduled processing portions 18 of the fin portions 16A and 17A. Further, the mounting base 30A is also different from the mounting base 30 of the first embodiment in that through holes 40 are formed on both left and right sides of the scheduled processing portion 38 of the sandwiching portions 35A and 36A.

これらの貫通孔２０，４０は、共に、係止脚部６０の係止爪６２を挿通可能な広幅開口部２１，４１と、半割り筒部５３の軸方向ＩＤに沿う方向で広幅開口部２１，４１に連なり、軸部６１を挿通可能で、係止爪６２を挿通不能とする細幅開口部２２，４２と、を備えて構成されている。 Both of these through holes 20 and 40 have a wide opening 21 and 41 through which the locking claw 62 of the locking leg 60 can be inserted, and a wide opening 21 in the direction along the axial ID of the half-split cylinder 53. , 41, and narrow openings 22 and 42 that allow the shaft portion 61 to be inserted and the locking claw 62 to be impassable.

この第２実施形態では、本体部１１を折り畳んだエアバッグ１０Ａの流入口部１２にインフレーター２５を挿入した後、流入口部１２を取付ベース３０Ａの半割り筒部３３に収納して、ヒレ部１６Ａ，１７Ａを取付ベース３０Ａの挟持部３５Ａ，３６Ａの挟持面３５ａ，３６ａに載せ、そして、ブラケット５０Ａを被せる際、ブラケット５０Ａの各係止脚部６０の係止爪６２側を、対応するエアバッグ１０Ａのヒレ部１６Ａ，１７Ａと取付ベース３０Ａの挟持部３５Ａ，３６Ａとの各貫通孔２０，４０の広幅開口部２１，４１に挿入させ、そして、軸部６１を、広幅開口部２１，４１から細幅開口部２２，４２に移動させて、各係止爪６２を細幅開口部２２，４２の周縁に係止させる状態とする。そして、第１実施形態と同様に、ランスロックにより、カシメ接合部６５を形成し、インフレーター２５とエアバッグ１０Ａとを、ガスシール性を確保して、取付ベース３０Ａに組み付けている。すなわち、この第２実施形態では、カシメ接合部６５が、ブラケット５０Ａの各係止脚部６０を、貫通孔２０，４０の広幅開口部２１，４１から細幅開口部２２，４２に移動させた配置状態で、形成されている構成としている。 In the second embodiment, after the inflator 25 is inserted into the inflow port portion 12 of the airbag 10A in which the main body portion 11 is folded, the inflow port portion 12 is housed in the half-split cylinder portion 33 of the mounting base 30A, and the fin portion is provided. When the 16A and 17A are placed on the holding surfaces 35a and 36a of the holding portions 35A and 36A of the mounting base 30A and the bracket 50A is put on, the locking claw 62 side of each locking leg 60 of the bracket 50A is subjected to the corresponding air. The fin portions 16A, 17A of the bag 10A and the holding portions 35A, 36A of the mounting base 30A are inserted into the wide openings 21, 41 of the through holes 20, 40, and the shaft portion 61 is inserted into the wide openings 21, 41. To the narrow openings 22 and 42, each locking claw 62 is locked to the peripheral edge of the narrow openings 22 and 42. Then, as in the first embodiment, the caulking joint portion 65 is formed by the lance lock, and the inflator 25 and the airbag 10A are assembled to the mounting base 30A while ensuring the gas sealability. That is, in this second embodiment, the caulking joint 65 moves each locking leg 60 of the bracket 50A from the wide openings 21, 41 of the through holes 20, 40 to the narrow openings 22, 42. It is configured to be formed in the arranged state.

この第２実施形態のエアバッグ装置９Ａでは、第１実施形態と同様の作用効果を得ることができ、さらに、つぎのような作用・効果を得ることができる。すなわち、ブラケット５０Ａの挟持部５５Ａ，５６Ａが、取付ベース３０Ａの挟持部３５Ａ，３６Ａから離れようとしても、ブラケット５０Ａの係止脚部６０が、係止爪６２を、取付ベース３０Ａの挟持部３５Ａ，３６Ａの裏面３５ｂ，３６ｂ側を係止することから、カシメ接合部６５が緩む等しても、ブラケット５０Ａの挟持部５５Ａ，５６Ａにおける取付ベース３０Ａの挟持部３５Ａ，３６Ａから剥がれるような挙動を的確に防止できて、取付ベース３０Ａが、ガスシール性を確保して、エアバッグ１０Ａとインフレーター２５とを安定して保持することができる。 In the airbag device 9A of the second embodiment, the same action and effect as those of the first embodiment can be obtained, and further, the following actions and effects can be obtained. That is, even if the holding portions 55A and 56A of the bracket 50A try to separate from the holding portions 35A and 36A of the mounting base 30A, the locking leg 60 of the bracket 50A holds the locking claw 62 and the holding portion 35A of the mounting base 30A. Since the back surfaces 35b and 36b sides of 36A are locked, even if the caulking joint portion 65 is loosened, the behavior is such that the holding portions 35A and 36A of the mounting base 30A in the holding portions 55A and 56A of the bracket 50A are peeled off. It can be accurately prevented, and the mounting base 30A can secure the gas sealability and stably hold the airbag 10A and the inflator 25.

なお、塑性変形加工によりカシメ接合部を形成する場合、ランスロックの他に、トックスカシメを利用してもよい。このトックスカシメは、図１３のＡに示すように、例えば、エアバッグ１０のヒレ部１６側では（ヒレ部１７側も同様である）、ヒレ部１６を間にして重ねた挟持部３５，５５の加工予定部１８，３８，５８を、プレス型１００Ａのホルダ１０１Ａ側の可動押え型１０２Ａと押え型１０４Ａとで固定して、押え型１０４Ａを挿通するパンチ１０３Ａを、凹ませるように加工予定部１８，３８，５８に当てて、重ねた挟持部３５，５５を共に塑性変形させ、さらに、ホルダ１０１Ａ側の可動押え型１０２Ａを開いて、パンチ１０３Ａをホルダ１０１Ａ側にさらに押し付けて、加工予定部３８，５８を圧縮し、塑性変形部位６５ａにアンダカット部（係止突部）６６を形成し、アンダカット部６６を、塑性変形部位６５ｂの対応する係止部６７に係止させる寸法に加工して、カシメ接合部６５Ａを形成するものである。そのため、挟持部３５，５５を接合させるカシメ接合部６５Ａは、所定のプレス型１００Ａを利用したトックスカシメにより、簡便に、形成することができる。 When the caulking joint is formed by plastic deformation processing, tox caulking may be used in addition to the lance lock. As shown in A of FIG. 13, this tox caulking is performed, for example, on the fin portion 16 side of the airbag 10 (the same applies to the fin portion 17 side), the holding portions 35, 55 in which the fin portions 16 are overlapped. The planned machining portions 18, 38, 58 of the above are fixed by the movable presser die 102A and the presser die 104A on the holder 101A side of the press die 100A, and the punch 103A through which the presser die 104A is inserted is recessed. The overlapping sandwiching portions 35 and 55 are plastically deformed by applying them to 18, 38, 58, and further, the movable presser mold 102A on the holder 101A side is opened, and the punch 103A is further pressed against the holder 101A side to further press the planned processing portion. 38, 58 are compressed to form an undercut portion (locking protrusion) 66 at the plastic deformation portion 65a, and the undercut portion 66 is processed to a size that locks the undercut portion 66 with the corresponding locking portion 67 of the plastic deformation portion 65b. Then, the caulking joint portion 65A is formed. Therefore, the caulking joint portion 65A for joining the holding portions 35 and 55 can be easily formed by tox caulking using a predetermined press mold 100A.

また、各実施形態では、取付ベース３０，３０Ａを略平板形状に形成した場合を示したが、直方体の箱形状として、箱形状の底壁部に、半割り筒部３３や挟持部３５，３６を配設するように形成してもよい。 Further, in each embodiment, the case where the mounting bases 30 and 30A are formed in a substantially flat plate shape is shown, but as a rectangular parallelepiped box shape, a half-split cylinder portion 33 and a holding portion 35, 36 are formed on a box-shaped bottom wall portion. May be formed so as to dispose of.

さらに、各実施形態では、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９，９Ａ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、ブラケットを利用し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。 Further, in each embodiment, the knee protection airbag devices 9 and 9A for protecting the knees of the passenger seat occupant have been described, but an inflator is inserted into the inlet portion of the airbag and a bracket is used. As long as it is an airbag device to be assembled to the mounting base, the present invention is not limited to the knee protection airbag device, and the present invention may be applied to a passenger airbag device or the like that protects the upper body of a passenger in the passenger seat. good.

９，９Ａ…（膝保護用）エアバッグ装置、１０，１０Ａ…エアバッグ、１１…本体部、１２…流入口部、１６，１６Ａ，１７，１７Ａ…（内縁側）ヒレ部、２０…貫通孔、２１…広幅開口部、２２…細幅開口部、２５…インフレーター、２７…ガス吐出部、３０，３０Ａ…取付ベース、３１，３１Ａ…保持板部、３３…半割り筒部、３５，３６，３５Ａ，３６Ａ…挟持部、４０…貫通孔、４１…広幅開口部、４２…細幅開口部、５０，５０Ａ…ブラケット、５３…半割り筒部、５５，５６、５５Ａ，５６Ａ…挟持部、６０…係止脚部、６１…軸部、６２…係止爪、６５，６５Ａ…カシメ接合部、６６…（係止突部）アンダカット部、ＶＤ…軸直交方向、Ｇ…膨張用ガス。 9,9A ... (for knee protection) Airbag device, 10,10A ... Airbag, 11 ... Main body, 12 ... Inlet, 16,16A, 17,17A ... (Inner edge side) Fin, 20 ... Through hole , 21 ... Wide opening, 22 ... Narrow opening, 25 ... Inflator, 27 ... Gas discharge, 30, 30A ... Mounting base, 31, 31A ... Holding plate, 33 ... Half-split cylinder, 35, 36, 35A, 36A ... Holding part, 40 ... Through hole, 41 ... Wide opening, 42 ... Narrow opening, 50, 50A ... Bracket, 53 ... Half-split cylinder part, 55, 56, 55A, 56A ... Holding part, 60 ... Locking leg, 61 ... Shaft, 62 ... Locking claw, 65, 65A ... Caulking joint, 66 ... (Locking protrusion) Undercut, VD ... Axis orthogonal direction, G ... Expansion gas.

Claims

膨張用ガスを流入させて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、
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板金製の取付ベースと、
前記インフレーターを前記取付ベースに取り付ける板金製のブラケットと、
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、可撓性を有したシート材から形成されて、
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、を備えるとともに、
前記流入口部の外周面側における前記流入口部の軸直交方向の両側に張り出すヒレ部、を備えて構成され、
前記取付ベースと前記ブラケットとが、
前記インフレーターを挿入させた前記エアバッグの略円柱状の流入口部の外周の略全周を包み可能に、前記流入口部の外周の略半周ずつを、それぞれ、覆い可能な断面略半割り円筒状の半割り筒部と、
前記エアバッグの前記流入口部の両側の前記ヒレ部を相互に挟持可能な板状の挟持部と、
を備え、
前記取付ベースと前記ブラケットとの前記挟持部が、前記流入口部の両側の前記ヒレ部を挟持した状態で、重ねて相互に一体的に凹凸を賦形しつつ、かつ、相互離脱を規制するアンダカット部を形成する塑性変形加工によるカシメ接合部により、相互に連結されていることを特徴とするエアバッグ装置。 An airbag that expands by inflowing expansion gas,
An inflator that supplies expansion gas to the airbag and
A sheet metal mounting base that holds the airbag and the inflator and is mounted on the mounting site.
A sheet metal bracket that attaches the inflator to the mounting base,
It is an airbag device that is configured with
The inflator has a substantially cylindrical shape in which a gas discharge portion for discharging expansion gas is arranged on the tip side.
The airbag is formed of a flexible sheet material,
The main body that expands by inflowing expansion gas from the folded state,
It is provided with a cylindrical inflow port portion that communicates with the main body portion, inserts the tip end side of the inflator, and allows expansion gas from the inflator to flow into the main body portion.
It is configured to include fins protruding on both sides of the inflow port in the direction orthogonal to the axis on the outer peripheral surface side of the inflow port.
The mounting base and the bracket
Approximately half the circumference of the outer circumference of the air bag into which the inflator is inserted can be wrapped around the outer circumference of the substantially cylindrical inflow port portion, and approximately half the circumference of the outer circumference of the inflow port portion can be covered. Half-split cylinder and
A plate-shaped holding portion capable of mutually holding the fin portions on both sides of the inlet portion of the airbag, and a plate-shaped holding portion.
With
In a state where the sandwiching portion between the mounting base and the bracket sandwiches the fin portions on both sides of the inflow port portion, the fin portions are overlapped and integrally formed with each other, and mutual separation is regulated. An airbag device characterized in that it is connected to each other by a caulking joint formed by plastic deformation processing to form an undercut portion.

前記取付ベースと前記ブラケットとの前記挟持部相互のカシメ接合部が、ランスロックによる塑性変形加工により、形成されていることを特徴とする請求項１に記載のエアバッグ装置。 The airbag device according to claim 1, wherein a caulking joint between the holding portion of the mounting base and the bracket is formed by plastic deformation processing by a lance lock.

前記ブラケットの前記半割り筒部の両側に、係止脚部が形成され、
該係止脚部が、それぞれ、
前記ブラケットの前記挟持部の挟持面と略直交するように、前記半割り筒部の両側の部位から突出して、前記取付ベースの前記挟持部と前記エアバッグの前記ヒレ部とに設けられた貫通孔を貫通する軸部と、
該軸部の先端から、前記ブラケットの前記半割り筒部から離れる方向に屈曲して、前記取付ベースの挟持部の裏面側の前記貫通孔の周縁を係止可能な係止爪と、
を備えて構成され、
前記取付ベースの前記挟持部と前記エアバッグの前記ヒレ部との前記貫通孔が、前記係止爪を挿通可能な広幅開口部と、前記半割り筒部の軸方向に沿う方向で前記広幅開口部に連なり、前記軸部を挿通可能で、前記係止爪を挿通不能とする細幅開口部と、を備えて構成され、
前記カシメ接合部が、前記ブラケットの前記係止脚部を、前記貫通孔の前記広幅開口部から前記細幅開口部に移動させた配置状態で、形成されていることを特徴とする請求項１若しくは請求項２に記載のエアバッグ装置。 Locking legs are formed on both sides of the half-split cylinder portion of the bracket.
The locking legs are, respectively.
Penetration provided in the holding portion of the mounting base and the fin portion of the airbag so as to project from both side portions of the half-split cylinder portion so as to be substantially orthogonal to the holding surface of the holding portion of the bracket. The shaft that penetrates the hole and
A locking claw that can be bent from the tip of the shaft portion in a direction away from the half-split cylinder portion of the bracket to lock the peripheral edge of the through hole on the back surface side of the holding portion of the mounting base.
Is configured with
The through hole between the holding portion of the mounting base and the fin portion of the airbag has a wide opening through which the locking claw can be inserted and the wide opening in a direction along the axial direction of the half-split cylinder portion. It is configured to include a narrow opening that is connected to the portion, allows the shaft portion to be inserted, and prevents the locking claw from being inserted.
1. The caulking joint is formed in a state in which the locking leg portion of the bracket is moved from the wide opening of the through hole to the narrow opening of the through hole. Alternatively, the airbag device according to claim 2.