JP6756323B2 - Airbag device - Google Patents

Airbag device Download PDF

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JP6756323B2
JP6756323B2 JP2017188204A JP2017188204A JP6756323B2 JP 6756323 B2 JP6756323 B2 JP 6756323B2 JP 2017188204 A JP2017188204 A JP 2017188204A JP 2017188204 A JP2017188204 A JP 2017188204A JP 6756323 B2 JP6756323 B2 JP 6756323B2
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wall portion
airbag
frame body
inflator
peripheral wall
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良太郎 石田
良太郎 石田
渉 三浦
渉 三浦
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Toyoda Gosei Co Ltd
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本発明は、折り畳まれたエアバッグと、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収納して保持するケースと、を備える構成のエアバッグ装置に関する。 The present invention relates to an airbag device having a structure including a folded airbag, an inflator for supplying an expansion gas to the airbag, and a case for storing and holding the airbag and the inflator.

従来、エアバッグ装置としては、ケースを、布材等のシート体から形成される第1部材と、第1部材よりも剛性の高い材料から形成される第2部材と、の2部材から構成したものがあった。このエアバッグ装置では、第1部材が、エアバッグ突出用の開口を有して折り畳まれたエアバッグを収納可能な略箱形状とされ、第2部材が、第1部材の開口の周囲の部位を連続的に枠状に囲む枠体部と、インフレーターを取り付けるインフレーター取付座と、を備える構成とされ、枠体部に、折り畳まれたエアバッグを覆うエアバッグカバーの側壁部を係止させるための係止爪部を配設させる構成とされていた。このエアバッグ装置では、第1部材の開口周縁に、これらの係止爪部を挿通可能な係止用開口を形成し、第1部材の開口周縁を、エアバッグカバーの側壁部とともに、係止爪部を利用して第2部材に係止させる構成であった(例えば、特許文献1参照)。 Conventionally, as an airbag device, a case is composed of two members, a first member formed of a sheet body such as a cloth material and a second member formed of a material having a higher rigidity than the first member. There was something. In this airbag device, the first member has a substantially box shape capable of accommodating a folded airbag having an opening for projecting the airbag, and the second member is a portion around the opening of the first member. It is configured to include a frame body portion that continuously surrounds the airbag in a frame shape and an inflator mounting seat for mounting an inflator, and for locking the side wall portion of the airbag cover that covers the folded airbag to the frame body portion. It was configured to dispose the locking claws of. In this airbag device, a locking opening through which these locking claws can be inserted is formed on the opening peripheral edge of the first member, and the opening peripheral edge of the first member is locked together with the side wall portion of the airbag cover. It was configured to be locked to the second member by using the claw portion (see, for example, Patent Document 1).

国際公開第2010/150603号International Publication No. 2010/150603

しかし、従来のエアバッグ装置では、ケースにおいて、剛性の高い第2部材は、第1部材の開口周縁を囲むように配置されており、インフレーターを取り付けるインフレーター取付座を備える構成であるものの、第1部材の底部側の領域は、大きく露出されている構成であった。この第1部材は、布材等のシート体から構成されていることから、エアバッグが、膨張初期において、ケース内で膨張する際に、第1部材の底部側の領域を外方に押し出すように変形させて、迅速にケースから突出できない虞れがあった。また、第1部材は、開口周縁を第2部材の係止爪部に係止させている構成であることから、変形時に、第1部材の開口周縁が係止爪部によって破れてしまう場合もあり、破れた場合には、その破れた部位にエアバッグが進入して、迅速にケースから突出できない虞れがあった。 However, in the conventional airbag device, in the case, the second member having high rigidity is arranged so as to surround the opening peripheral edge of the first member, and the first member is provided with an inflator mounting seat for mounting the inflator. The area on the bottom side of the member was largely exposed. Since this first member is composed of a sheet body such as a cloth material, when the airbag expands in the case at the initial stage of expansion, the region on the bottom side of the first member is pushed outward. There was a risk that it could not be quickly projected from the case due to its deformation. Further, since the first member has a configuration in which the opening peripheral edge is locked to the locking claw portion of the second member, the opening peripheral edge of the first member may be torn by the locking claw portion at the time of deformation. If it was torn, there was a risk that the airbag would enter the torn part and could not quickly protrude from the case.

本発明は、上述の課題を解決するものであり、軽量化を図ることができて、かつ、エアバッグを迅速に膨張させることが可能なエアバッグ装置を提供することを目的とする。 An object of the present invention is to solve the above-mentioned problems, and to provide an airbag device capable of reducing weight and rapidly inflating an airbag.

本発明に係るエアバッグ装置は、折り畳まれたエアバッグと、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収納して保持するケースと、を備える構成とされて、
ケースが、可撓性を有したシート体から形成される第1部材と、第1部材よりも剛性の高い材料から形成される第2部材と、の2部材から構成されるエアバッグ装置であって、
第1部材が、底壁部と、底壁部から延びる略筒状の周壁部と、を備えるとともに、周壁部の先端側を開口させて、折り畳まれたエアバッグを収納可能な略箱形状として構成され、
第2部材が、底壁部の下面側に配置されてインフレーターを取り付けるインフレーター取付座と、周壁部の外周側を周壁部の周方向に略沿って連続的に枠状に囲むように配置される枠体部と、インフレーター取付座から延びてインフレーター取付座と枠体部とを連結させる連結部と、を有するとともに、インフレーター取付座と枠体部との間に、第1部材における底壁部から周壁部に連なる領域の一部を部分的に露出させるような隙間を、設ける構成とされ、
枠体部が、エアバッグの膨張時に、第1部材の隙間からの突出を抑制可能に、枠体部に対する周壁部の圧接部位のずれ移動を抑制するように配設されていることを特徴とする。
The airbag device according to the present invention is configured to include a folded airbag, an inflator that supplies an expansion gas to the airbag, and a case that stores and holds the airbag and the inflator.
The case is an airbag device composed of two members, a first member formed of a flexible sheet body and a second member formed of a material having a higher rigidity than the first member. hand,
The first member includes a bottom wall portion and a substantially tubular peripheral wall portion extending from the bottom wall portion, and the tip side of the peripheral wall portion is opened to form a substantially box shape capable of storing a folded airbag. Configured
The second member is arranged so as to surround the inflator mounting seat, which is arranged on the lower surface side of the bottom wall portion and mounts the inflator, and the outer peripheral side of the peripheral wall portion substantially along the circumferential direction of the peripheral wall portion in a frame shape. It has a frame body portion and a connecting portion extending from the inflator mounting seat to connect the inflator mounting seat and the frame body portion, and between the inflator mounting seat and the frame body portion from the bottom wall portion of the first member. A gap is provided so as to partially expose a part of the area connected to the peripheral wall portion.
It is characterized in that the frame body portion is arranged so as to be able to suppress protrusion from the gap of the first member when the airbag is inflated and to suppress the displacement movement of the pressure contact portion of the peripheral wall portion with respect to the frame body portion. To do.

本発明のエアバッグ装置では、エアバッグの膨張時に、ケースにおいて可撓性を有したシート体から構成される第1部材は、ケース内において膨張するエアバッグにより、外方へ押圧されるような態様となるが、このとき、第1部材の周壁部が、第1部材よりも剛性の高い材料から形成される第2部材において、第1部材の周壁部の外周側を囲むように配置される枠体部に、圧接されることとなる。そして、本発明のエアバッグ装置では、第2部材が、インフレーター取付座と枠体部との間に第1部材を露出させるような隙間を有する構成であるが、エアバッグのケース内での膨張時に、第1部材が、底壁部から周壁部に連なる領域の一部を、第2部材の隙間から突出させるように変形しようとしても、枠体部が、周壁部を圧接させることにより、周壁部の枠体部に対するずれ移動を規制することとなって、第1部材において、底壁部から周壁部に連なる領域が、インフレーター取付座と枠体部との間の隙間から突出するように変形することを、防止できる。そのため、本発明のエアバッグ装置では、第2部材が、インフレーター取付座と枠体部との間に隙間を有し、第1部材の一部を露出させる構成であっても、エアバッグが、ケース内において膨張する膨張初期に、第2部材の枠体部により、第2部材の隙間から露出している領域を、大きく変形させることを抑制でき、内部に膨張用ガスを流入させて膨張するエアバッグを、ケースの開口から迅速に突出させることができる。さらに、本発明のエアバッグ装置では、剛性の高い材料から形成される第2部材を、インフレーター取付座と、枠体部と、インフレーター取付座から延びてインフレーター取付座と枠体部とを連結させる連結部と、を有する構成として、インフレーター取付座と枠体部との間に隙間を有する構成とされていることから、従来のエアバッグ装置に対して遜色なく、軽量化を図ることができる。 In the airbag device of the present invention, when the airbag is inflated, the first member composed of a flexible seat body in the case is pressed outward by the inflatable airbag in the case. At this time, the peripheral wall portion of the first member is arranged so as to surround the outer peripheral side of the peripheral wall portion of the first member in the second member formed of a material having a higher rigidity than the first member. It will be pressed against the frame body. The airbag device of the present invention has a configuration in which the second member has a gap between the inflator mounting seat and the frame body portion so as to expose the first member, but the airbag expands in the case. Occasionally, even if the first member attempts to deform a part of the region extending from the bottom wall portion to the peripheral wall portion so as to protrude from the gap of the second member, the frame body portion presses the peripheral wall portion to bring it into contact with the peripheral wall portion. By restricting the displacement movement of the portion with respect to the frame body portion, the region of the first member extending from the bottom wall portion to the peripheral wall portion is deformed so as to protrude from the gap between the inflator mounting seat and the frame body portion. Can be prevented from doing so. Therefore, in the airbag device of the present invention, even if the second member has a gap between the inflator mounting seat and the frame body portion and a part of the first member is exposed, the airbag can be used. In the initial stage of expansion that expands in the case, the frame portion of the second member can prevent the region exposed from the gap of the second member from being significantly deformed, and the expansion gas is allowed to flow into the case to expand. The airbag can be quickly projected from the opening of the case. Further, in the airbag device of the present invention, a second member formed of a highly rigid material is connected to the inflator mounting seat, the frame body portion, and the inflator mounting seat and the frame body portion extending from the inflator mounting seat. Since the structure having the connecting portion has a gap between the inflator mounting seat and the frame body portion, the weight can be reduced as much as that of the conventional airbag device.

したがって、本発明のエアバッグ装置では、軽量化を図ることができて、かつ、エアバッグを迅速に膨張させることができる。 Therefore, in the airbag device of the present invention, the weight can be reduced and the airbag can be inflated quickly.

また、本発明のエアバッグ装置において、枠体部を、周壁部における先端側と底壁部側との間の中央よりも底壁部側となる位置に、配置させる構成とすれば、エアバッグの膨張初期に、膨張するエアバッグが、周壁部において、枠体部よりも先端側の領域を外方に向かって押圧して、この周壁部における枠体部よりも先端側の領域を、枠体部よりも外方に突出させることとなり、この先端側の領域が枠体部に係止されて、周壁部の枠体部に対する移動を規制するような態様となることから、第1部材において枠体部よりも底壁部側の領域が、インフレーター取付座と枠体部との間の隙間から突出するように変形することを、一層的確に防止できて、好ましい。 Further, in the airbag device of the present invention, if the frame body portion is arranged at a position closer to the bottom wall portion than the center between the tip end side and the bottom wall portion side of the peripheral wall portion, the airbag At the initial stage of expansion, the inflating airbag presses the region on the tip side of the frame body portion outward on the peripheral wall portion, and the region on the tip end side of the frame body portion on the peripheral wall portion is framed. Since the region on the tip end side is locked to the frame body portion so as to project outward from the body portion and the movement of the peripheral wall portion with respect to the frame body portion is restricted, the first member It is preferable that the region on the bottom wall portion side of the frame body portion can be more accurately prevented from being deformed so as to protrude from the gap between the inflator mounting seat and the frame body portion.

さらに、上記構成のエアバッグ装置において、第1部材を、エアバッグ及びインフレーターとともに、インフレーター取付座に取り付ける構成とすれば、インフレーターを利用して、第1部材を第2部材に取り付けることができ、第1部材を第2部材に別途取り付けることが不要となって、好ましい。 Further, in the airbag device having the above configuration, if the first member is attached to the inflator mounting seat together with the airbag and the inflator, the first member can be attached to the second member by using the inflator. It is preferable because it is not necessary to separately attach the first member to the second member.

さらに、上記構成のエアバッグ装置において、折り畳まれたエアバッグを覆うエアバッグカバーを、開口を覆う天井壁部と、天井壁部から延びて先端側を枠体部に連結される略筒状の側壁部と、を備える構成とし、
天井壁部に、周囲にエアバッグの膨張時に破断可能とされる破断予定部を配置させて、エアバッグの展開膨張時に開き可能に構成される扉部を、配設させる構成とし、
側壁部を、エアバッグの展開膨張時に、枠体部より先端側の周壁部の外周側を支持可能に構成することが、好ましい。
Further, in the airbag device having the above configuration, the airbag cover covering the folded airbag has a substantially tubular shape in which the ceiling wall portion covering the opening and the tip side extending from the ceiling wall portion are connected to the frame body portion. It is configured to have a side wall and
On the ceiling wall, a ruptured part that can be broken when the airbag is expanded is arranged around it, and a door part that can be opened when the airbag is expanded and expanded is arranged.
It is preferable that the side wall portion is configured to be able to support the outer peripheral side of the peripheral wall portion on the distal end side of the frame body portion when the airbag is expanded and expanded.

エアバッグ装置をこのような構成とすれば、エアバッグの膨張初期に、第1部材の周壁部において、枠体部と開口との間の領域が、外周側を、エアバッグカバーの側壁部に支持されることから、周壁部が、その外周側を、枠体部とエアバッグカバーの側壁部との広い面積に圧接されて、一層、ずれ移動を規制されることとなり、エアバッグの膨張初期に、膨張するエアバッグが第1部材を変形させることを、極力抑制できて、エアバッグの内部に流入した膨張用ガスの内圧により、天井壁部を円滑に押圧することができる。その結果、天井壁部に形成される破断予定部を、円滑に破断させて、扉部を円滑に開かせ、エアバッグを突出させることができ、エアバッグを一層迅速に膨張させることが可能となる。 If the airbag device has such a configuration, at the initial stage of expansion of the airbag, the region between the frame portion and the opening in the peripheral wall portion of the first member has the outer peripheral side as the side wall portion of the airbag cover. Since it is supported, the peripheral wall portion is pressed against a wide area between the frame body portion and the side wall portion of the airbag cover on the outer peripheral side thereof, and the displacement movement is further restricted, and the initial expansion of the airbag In addition, the deformation of the first member by the expanding airbag can be suppressed as much as possible, and the ceiling wall portion can be smoothly pressed by the internal pressure of the expansion gas flowing into the inside of the airbag. As a result, the planned rupture portion formed on the ceiling wall portion can be smoothly ruptured, the door portion can be opened smoothly, the airbag can be projected, and the airbag can be expanded more quickly. Become.

本発明の一実施形態である助手席用エアバッグ装置を示す前後方向側での概略縦断面図である。It is a schematic vertical sectional view in the front-rear direction side which shows the airbag device for a passenger seat which is one Embodiment of this invention. 図1の助手席用エアバッグ装置の左右方向側での概略縦断面図である。It is a schematic vertical sectional view on the left-right direction side of the passenger seat airbag device of FIG. 実施形態の助手席用エアバッグ装置で使用されるケースの分解斜視図である。It is an exploded perspective view of the case used in the passenger airbag device of embodiment. 図3のケースにおける第1部材を構成する第1部材用基材を示す平面図である。It is a top view which shows the base material for the 1st member which constitutes the 1st member in the case of FIG. 図3のケースにおける第2部材の正面図である。It is a front view of the 2nd member in the case of FIG. 図5の第2部材の底面図である。It is a bottom view of the second member of FIG. 第2部材の縦断面図であり、図6のVII−VII部位を示す。It is a vertical cross-sectional view of the second member, and shows the VII-VII part of FIG. 第2部材の縦断面図であり、図6のVIII−VIII部位を示す。It is a vertical cross-sectional view of the second member, and shows the VIII-VIII part of FIG. 実施形態の助手席用エアバッグ装置において、エアバッグの膨張初期の状態を示す概略部分拡大断面図である。It is the schematic partial enlarged sectional view which shows the initial state of expansion of the airbag in the passenger seat airbag device of embodiment. 実施形態の助手席用エアバッグ装置において、エアバッグの膨張完了状態を示す部分拡大断面図である。It is a partially enlarged sectional view which shows the expansion completion state of the airbag in the passenger seat airbag device 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。実施形態では、助手席用エアバッグ装置M(以下「エアバッグ装置」と省略する)を、例に採り、説明する。なお、実施形態では、前後・上下・左右の方向は、特に断らない限り、エアバッグ装置Mを車両に搭載させた状態での車両の前後・上下・左右の方向と一致するものである。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiment, the passenger airbag device M (hereinafter abbreviated as “airbag device”) will be described as an example. In the embodiment, the front-back, up-down, and left-right directions coincide with the front-back, up-down, and left-right directions of the vehicle when the airbag device M is mounted on the vehicle, unless otherwise specified.

エアバッグ装置Mは、図1,2に示すように、車両における助手席の前方において、インストルメントパネル(以下「インパネ」と省略する)1の上面2の内部に配置されている。エアバッグ装置Mは、折り畳まれたエアバッグ25と、エアバッグ25に膨張用ガスを供給するインフレーター17と、エアバッグ25とインフレーター17とを収納保持するケース30と、エアバッグ25とインフレーター17とをケース30に取り付けるリテーナ19と、折り畳まれたエアバッグ25を覆うエアバッグカバー5と、を備えている。 As shown in FIGS. 1 and 2, the airbag device M is arranged inside the upper surface 2 of the instrument panel (hereinafter abbreviated as “instrument panel”) 1 in front of the passenger seat in the vehicle. The airbag device M includes a folded airbag 25, an inflator 17 that supplies an expansion gas to the airbag 25, a case 30 that houses and holds the airbag 25 and the inflator 17, and an airbag 25 and an inflator 17. It is provided with a retainer 19 for attaching the case 30 and an airbag cover 5 for covering the folded airbag 25.

エアバッグカバー5は、実施形態の場合、合成樹脂製のインパネ1と別体として形成して、インパネ1の開口の部位に、配置されている。エアバッグカバー5は、ポリオレフィン系熱可塑性エラストマー(TPO)等からなる合成樹脂製として、ケース30の開口31aを覆う天井壁部6と、天井壁部6から延びて先端側をケース30の後述する枠体部43に連結される略筒状の側壁部10と、を備える構成とされている。 In the case of the embodiment, the airbag cover 5 is formed as a separate body from the instrument panel 1 made of synthetic resin, and is arranged at the opening portion of the instrument panel 1. The airbag cover 5 is made of a synthetic resin made of a polyolefin-based thermoplastic elastomer (TPO) or the like, and has a ceiling wall portion 6 that covers the opening 31a of the case 30 and a tip side extending from the ceiling wall portion 6 to be described later. It is configured to include a substantially tubular side wall portion 10 connected to the frame body portion 43.

天井壁部6において、側壁部10に囲まれる領域には、エアバッグ25の展開膨張時に開き可能とされる2枚の扉部7,7が、周囲にエアバッグ25の膨張時に破断可能とされる破断予定部8を配置させて、形成されている。扉部7,7は、前後方向側で並設されるもので、破断予定部8は、詳細な図示を省略するが、扉部7,7の周囲において、上面側から見て略H字形状として構成されている。そして、扉部7,7は、エアバッグ25の展開膨張時に、膨張するエアバッグ25に押されて、破断予定部8を破断させつつ前後に開くこととなる。 In the ceiling wall portion 6, in the region surrounded by the side wall portion 10, two door portions 7 and 7 that can be opened when the airbag 25 is expanded and expanded are ruptured around the airbag 25 when the airbag 25 is expanded. It is formed by arranging a planned break portion 8. The door portions 7 and 7 are arranged side by side in the front-rear direction, and the planned fracture portion 8 is substantially H-shaped when viewed from the upper surface side around the door portions 7 and 7, although detailed illustration is omitted. It is configured as. Then, the door portions 7 and 7 are pushed by the expanding airbag 25 when the airbag 25 is expanded and expanded, and the door portions 7 and 7 are opened back and forth while breaking the planned fracture portion 8.

側壁部10は、ケース30における後述する第1部材31の周壁部33における上側の領域の外周側を覆うように配置されるもので、外形形状を、実施形態の場合、左右方向側を幅広とした略四角筒形状として構成されている。側壁部10において、前後方向側で対向して配置される前壁部11と後壁部12との先端側(下端11a,12a側)には、図1に示すように、ケース30における第2部材37の枠体部43に形成される係止爪部48を挿入させて周縁で係止可能な係止穴部11b,12bが、形成されている。係止穴部11b,12bは、詳細な図示を省略するが、係止爪部48に対応して、それぞれ、左右方向に沿って3箇所ずつ形成されている。また、側壁部10において、左右方向側で対向して配置される左壁部13と右壁部14との先端側(下端13a,14a側)には、図2に示すように、取付片13b,14bが、左右の外方に突出するように形成されている。この取付片13b,14bは、枠体部43の上端43a側において左右の外方に突出するように形成される取付片46を連結させるためのものであり、詳細な図示を省略するが、取付片46に対応して前後方向に沿って3個ずつ形成されている。各取付片13b,14bには、取付手段としてのボルト55を貫通させる貫通孔13c,14cが、取付片46に形成される後述する貫通孔46aに対応して形成されている。実施形態の場合、取付片13b,14bは、前壁部11,後壁部12に形成される係止穴部11b,12bと、上下方向側の位置を略一致させて、形成されている。そして、実施形態では、側壁部10(前壁部11,後壁部12,左壁部13,右壁部14)は、図1,2に示すように、第1部材31の周壁部33において、第2部材37の枠体部43より上側に突出している領域(上側部位34)の外周側を全面にわたって覆うように、構成されている。この側壁部10(前壁部11,後壁部12,左壁部13,右壁部14)は、エアバッグ25の展開膨張時には、第1部材31における周壁部33において、枠体部43より先端側の領域、すなわち、枠体部43から上側に突出している領域(上側部位34)の外周側を支持することとなる。 The side wall portion 10 is arranged so as to cover the outer peripheral side of the upper region of the peripheral wall portion 33 of the first member 31 described later in the case 30, and in the case of the embodiment, the outer shape is wide on the left-right direction side. It is configured as a substantially square cylinder shape. As shown in FIG. 1, on the front end side (lower end 11a, 12a side) of the front wall portion 11 and the rear wall portion 12 which are arranged so as to face each other in the front-rear direction side of the side wall portion 10, the second in the case 30 Locking holes 11b and 12b that can be locked at the peripheral edge by inserting the locking claw portion 48 formed in the frame body portion 43 of the member 37 are formed. Although detailed illustration is omitted, the locking hole portions 11b and 12b are formed at three locations along the left-right direction, respectively, corresponding to the locking claw portion 48. Further, in the side wall portion 10, on the tip side (lower end 13a, 14a side) of the left wall portion 13 and the right wall portion 14 arranged to face each other in the left-right direction side, as shown in FIG. 2, the mounting piece 13b , 14b are formed so as to project outward to the left and right. The mounting pieces 13b and 14b are for connecting the mounting pieces 46 formed so as to project outward to the left and right on the upper end 43a side of the frame body portion 43, and although detailed illustration is omitted, they are mounted. Three pieces are formed along the front-rear direction corresponding to the piece 46. Through holes 13c and 14c through which the bolt 55 as a mounting means is penetrated are formed in the mounting pieces 13b and 14b corresponding to the through holes 46a described later formed in the mounting piece 46. In the case of the embodiment, the mounting pieces 13b and 14b are formed so that the positions on the vertical side are substantially aligned with the locking holes 11b and 12b formed in the front wall portion 11 and the rear wall portion 12. Then, in the embodiment, the side wall portion 10 (front wall portion 11, rear wall portion 12, left wall portion 13, right wall portion 14) is formed on the peripheral wall portion 33 of the first member 31 as shown in FIGS. The second member 37 is configured to cover the entire outer peripheral side of the region (upper portion 34) protruding upward from the frame body portion 43. The side wall portion 10 (front wall portion 11, rear wall portion 12, left wall portion 13, right wall portion 14) is attached to the peripheral wall portion 33 of the first member 31 from the frame body portion 43 when the airbag 25 is deployed and expanded. The region on the tip end side, that is, the outer peripheral side of the region (upper side portion 34) protruding upward from the frame body portion 43 is supported.

インフレーター17は、図1,2に示すように、複数のガス吐出口17bを有した略円柱状の本体部17aと、インフレーター17をケースに取り付けるためのフランジ部17cと、を備えて構成されている。 As shown in FIGS. 1 and 2, the inflator 17 includes a substantially columnar main body portion 17a having a plurality of gas discharge ports 17b, and a flange portion 17c for attaching the inflator 17 to the case. There is.

エアバッグ25は、内部に膨張用ガスを流入させて膨張可能な可撓性を有した袋状として構成されるもので、ケース30における第1部材31内に折り畳まれて収納され、膨張完了時に、助手席に着座した乗員を保護可能に、構成されている。エアバッグ25には、内部に膨張用ガスを流入可能に開口して、周縁を、インフレーター17とともに、ケース30における底壁部32の下面側に配置されるインフレーター取付座38に取り付けられるガス流入口25aが、形成されている。 The airbag 25 is configured as a bag having flexibility that allows expansion gas to flow into the inside, and is folded and stored in the first member 31 of the case 30, and when expansion is completed. , It is configured to protect the occupants seated in the passenger seat. The airbag 25 is opened so that expansion gas can flow into the airbag 25, and the peripheral edge is attached to the inflator mounting seat 38 arranged on the lower surface side of the bottom wall portion 32 in the case 30 together with the inflator 17. 25a is formed.

ケース30は、図1〜3に示すように、可撓性を有したシート体から形成される第1部材31と、第1部材31よりも剛性の高い材料から形成される第2部材37と、の2部材から構成されている。 As shown in FIGS. 1 to 3, the case 30 includes a first member 31 formed of a flexible sheet body and a second member 37 formed of a material having a higher rigidity than the first member 31. It is composed of two members,, and.

第1部材31は、実施形態の場合、ポリエステル糸やポリアミド糸等からなる織布から形成されるもので、左右方向側を幅広とした略長方形状の底壁部32と、底壁部32から延びる略四角筒状の周壁部33と、を備え、周壁部33の先端側(上端33a側)を開口させて、折り畳まれたエアバッグ25を収納可能な略箱形状とされている。底壁部32の中央には、インフレーター17の本体部17aを挿入可能な挿入孔32aが、形成され、挿入孔32aの周囲には、リテーナ19のボルト19aを挿通可能な取付孔32bが、ボルト19aに対応して、4個形成されている。第1部材31は、実施形態の場合、底壁部32の外周縁からそれぞれ、周壁部33を構成する部位を延ばした形状とされる第1部材用基材60(図4参照)において、周壁部33を構成する部位の隣り合う縁35,35相互を結合(縫着)させることにより、略箱形状とされている。 In the case of the embodiment, the first member 31 is formed of a woven fabric made of polyester yarn, polyamide yarn, or the like, and is formed from a substantially rectangular bottom wall portion 32 having a wide left-right direction side and a bottom wall portion 32. A substantially square tubular peripheral wall portion 33 is provided, and the distal end side (upper end 33a side) of the peripheral wall portion 33 is opened so that the folded airbag 25 can be stored in a substantially box shape. An insertion hole 32a into which the main body 17a of the inflator 17 can be inserted is formed in the center of the bottom wall portion 32, and a mounting hole 32b into which the bolt 19a of the retainer 19 can be inserted is formed around the insertion hole 32a. Four are formed corresponding to 19a. In the case of the embodiment, the first member 31 is a peripheral wall of the first member base material 60 (see FIG. 4) having a shape in which a portion constituting the peripheral wall portion 33 is extended from the outer peripheral edge of the bottom wall portion 32, respectively. By connecting (sewing) the adjacent edges 35, 35 of the parts constituting the portion 33 to each other, the shape is substantially box-shaped.

第2部材37は、実施形態の場合、板金素材から形成されている。第2部材37は、図5〜8に示すように、第1部材31の底壁部32側に配置されるインフレーター取付座38と、第1部材31の周壁部33側に配置される枠体部43と、インフレーター取付座38から延びてインフレーター取付座38と枠体部43とを連結させる連結部40と、を備える構成とされている。 In the case of the embodiment, the second member 37 is formed of a sheet metal material. As shown in FIGS. 5 to 8, the second member 37 includes an inflator mounting seat 38 arranged on the bottom wall portion 32 side of the first member 31, and a frame body arranged on the peripheral wall portion 33 side of the first member 31. It is configured to include a portion 43 and a connecting portion 40 extending from the inflator mounting seat 38 and connecting the inflator mounting seat 38 and the frame body portion 43.

インフレーター取付座38は、図3,6に示すように、前後方向側で分離して配置されるもので、第1部材31の外周側に第2部材37を配置させた状態で、第1部材31における底壁部32の下面側において、底壁部32に形成される挿入孔32aの前側と後側との領域に、配置されている。インフレーター取付座38は、底壁部32の下面側を部分的に覆うとともに、インフレーター17のフランジ部17cとリテーナ19とによって挟持可能な略平板状として構成されるもので、前後方向の内側となる内縁38aを、インフレーター17の本体部17aを間に挿通可能に、本体部17aの外周面に沿って略円弧状に湾曲させて構成されている。この内縁38aは、実施形態の場合、インフレーター取付座38を底壁部32に重ねた状態で、挿入孔32aの縁部に略一致して、挿入孔32aに略沿うように形成されている(図6参照)。また、インフレーター取付座38の左右両端側には、それぞれ、リテーナ19のボルト19aを挿通可能な取付孔38bが、計4個形成されている。実施形態の場合、エアバッグ25とインフレーター17とは、エアバッグ25内に配置させたリテーナ19の各ボルト19aを、エアバッグ25におけるガス流入口25aの周縁を貫通させて、第1部材31の底壁部32に形成される取付孔32bと、第2部材37のインフレーター取付座38に形成される取付孔38bと、に、挿通させ、インフレーター17のフランジ部17cを貫通させて、ナット20止めすることにより、ケース30の底壁部32に取り付けられる構成であり、このとき、第1部材31も、インフレーター取付座38に取り付けられて、第2部材37に取り付けられる構成である。 As shown in FIGS. 3 and 6, the inflator mounting seat 38 is separately arranged on the front-rear side, and the first member is in a state where the second member 37 is arranged on the outer peripheral side of the first member 31. 31 is arranged on the lower surface side of the bottom wall portion 32 in the regions of the front side and the rear side of the insertion hole 32a formed in the bottom wall portion 32. The inflator mounting seat 38 partially covers the lower surface side of the bottom wall portion 32, and is configured as a substantially flat plate that can be sandwiched between the flange portion 17c of the inflator 17 and the retainer 19, and is inside in the front-rear direction. The inner edge 38a is configured to be curved in a substantially arc shape along the outer peripheral surface of the main body 17a so that the main body 17a of the inflator 17 can be inserted between them. In the case of the embodiment, the inner edge 38a is formed so as to substantially coincide with the edge of the insertion hole 32a and substantially along the insertion hole 32a in a state where the inflator mounting seat 38 is overlapped with the bottom wall portion 32. (See FIG. 6). Further, a total of four mounting holes 38b through which the bolts 19a of the retainer 19 can be inserted are formed on the left and right ends of the inflator mounting seat 38, respectively. In the case of the embodiment, the airbag 25 and the inflator 17 pass each bolt 19a of the retainer 19 arranged in the airbag 25 through the peripheral edge of the gas inlet 25a in the airbag 25, and the first member 31. It is inserted into the mounting hole 32b formed in the bottom wall portion 32 and the mounting hole 38b formed in the inflator mounting seat 38 of the second member 37, penetrates the flange portion 17c of the inflator 17, and stops the nut 20. By doing so, it is configured to be attached to the bottom wall portion 32 of the case 30, and at this time, the first member 31 is also attached to the inflator mounting seat 38 and attached to the second member 37.

連結部40は、インフレーター取付座38の前後方向の外側となる外縁38cから延びるように形成されるもので、第1部材31の周壁部33の前面側と後面側とを覆うように、インフレーター取付座38から上方に延びる構成とされて、先端側(上端40a側)を、枠体部43に連結される構成である。実施形態の場合、連結部40は、前後方向側の幅寸法を、インフレーター取付座38の前後方向側の幅寸法と略一致させた略長方形状とされている(図3,8参照)。 The connecting portion 40 is formed so as to extend from the outer edge 38c which is the outer side in the front-rear direction of the inflator mounting seat 38, and is mounted on the inflator so as to cover the front surface side and the rear surface side of the peripheral wall portion 33 of the first member 31. It is configured to extend upward from the seat 38, and the tip end side (upper end 40a side) is connected to the frame body portion 43. In the case of the embodiment, the connecting portion 40 has a substantially rectangular shape in which the width dimension on the front-rear direction side is substantially the same as the width dimension on the front-rear direction side of the inflator mounting seat 38 (see FIGS. 3 and 8).

枠体部43は、周壁部33の外周側を周壁部33の周方向に沿って連続的に枠状に囲むように配置されている。枠体部43は、周壁部33の外周側を囲み可能で、かつ、エアバッグ25の膨張時には、この枠体部43の内周面44が、周壁部33の圧接部位となる。この枠体部43は、上下方向側から見た外形形状を、周壁部33よりも僅かに大きくして、左右方向側を幅広とした略長方形枠状とされている。また、実施形態の場合、枠体部43の上端43a側には、フランジ部43bが、前後の外方と左右の外方に延びるように形成されている(図3,6〜8参照)。実施形態の場合、フランジ部43bは、枠体部43の上端43a側において全周にわたって連続的に形成されている。そして、枠体部43の内周面44には、エアバッグ25の膨張時に、膨張するエアバッグ25によって外方に押圧される第1部材31の周壁部33が、圧接されることとなる(図9,10参照)。実施形態の場合、枠体部43の内周面44は、周壁部33を圧接させやすいように、平坦面とされている。 The frame body portion 43 is arranged so as to continuously surround the outer peripheral side of the peripheral wall portion 33 in a frame shape along the circumferential direction of the peripheral wall portion 33. The frame body portion 43 can surround the outer peripheral side of the peripheral wall portion 33, and when the airbag 25 is inflated, the inner peripheral surface 44 of the frame body portion 43 becomes a pressure contact portion of the peripheral wall portion 33. The frame body portion 43 has a substantially rectangular frame shape in which the outer shape seen from the vertical direction side is slightly larger than that of the peripheral wall portion 33 and the horizontal direction side is wide. Further, in the case of the embodiment, the flange portion 43b is formed on the upper end 43a side of the frame body portion 43 so as to extend outward in the front-rear direction and outward in the left-right direction (see FIGS. 3 and 6 to 8). In the case of the embodiment, the flange portion 43b is continuously formed over the entire circumference on the upper end 43a side of the frame body portion 43. Then, the peripheral wall portion 33 of the first member 31, which is pressed outward by the expanding airbag 25 when the airbag 25 is expanded, is pressed against the inner peripheral surface 44 of the frame body portion 43 ( (See FIGS. 9 and 10). In the case of the embodiment, the inner peripheral surface 44 of the frame body portion 43 is a flat surface so that the peripheral wall portion 33 can be easily pressed against each other.

また、枠体部43は、エアバッグ25の膨張時に、第1部材31の隙間50,50からの突出を抑制可能に、枠体部43に対する周壁部33の圧接部位33bのずれ移動を抑制するように配設されている。詳細には、枠体部43は、周壁部33における内周面44への圧接部位33bを、エアバッグ25の膨張時に、枠体部43に対するずれ移動を抑制して、第1部材31における底壁部32から周壁部33に連なる領域、詳細には、底壁部32における挿入孔32aの左右両側から周壁部33に連なる左側領域31bと右側領域31c(図3,6参照)を、第2部材37における後述する隙間50,50から突出させるような変形を、規制可能とするような位置に、配設されている。すなわち、実施形態では、エアバッグ25の膨張時に、エアバッグ25によって外方に押圧される第1部材31の周壁部33が、図9に示すように、枠体部43の内周面44に圧接されれば、その後、内周面44と圧接部位33bとの圧接状態が維持されることとなり、周壁部33が枠体部43に対して下方に移動するようなずれ移動を規制され、第2部材37におけるインフレーター取付座38と枠体部43との間の隙間50,50から第1部材31が突出することを、防止できる。実施形態の場合、枠体部43は、第1部材31の外周側に第2部材37を配置させた状態で、周壁部33の上下の中央(周壁部33における先端(上端33a)側と底壁部32側との間の中央)よりも底壁部32側となる位置に、配置されている。具体的には、枠体部43は、周壁部33において、底壁部32から2/5程度となる位置に、配置されている。また、枠体部43は、上下方向側で幅広として構成され、この上下方向側の幅寸法W(図8参照)を、内周面44への周壁部33の圧接時に、内周面44と、周壁部33における内周面44への圧接部位33bと、の間に、周壁部33のずれ移動を規制可能な摩擦抵抗を発生可能な寸法に、設定されている。 Further, the frame body portion 43 can suppress the protrusion of the first member 31 from the gaps 50 and 50 when the airbag 25 is expanded, and suppresses the displacement movement of the pressure contact portion 33b of the peripheral wall portion 33 with respect to the frame body portion 43. It is arranged so as to. Specifically, the frame body portion 43 suppresses the displacement movement of the pressure contact portion 33b of the peripheral wall portion 33 to the inner peripheral surface 44 with respect to the frame body portion 43 when the airbag 25 is expanded, and the bottom of the first member 31. A region extending from the wall portion 32 to the peripheral wall portion 33, specifically, a left side region 31b and a right side region 31c (see FIGS. 3 and 6) connecting from the left and right sides of the insertion hole 32a in the bottom wall portion 32 to the peripheral wall portion 33. The member 37 is arranged at a position where deformation such as protruding from the gaps 50, 50 described later can be regulated. That is, in the embodiment, when the airbag 25 is expanded, the peripheral wall portion 33 of the first member 31 pressed outward by the airbag 25 is formed on the inner peripheral surface 44 of the frame body portion 43 as shown in FIG. After the pressure contact, the pressure contact state between the inner peripheral surface 44 and the pressure contact portion 33b is maintained, and the displacement movement such that the peripheral wall portion 33 moves downward with respect to the frame body portion 43 is restricted. It is possible to prevent the first member 31 from protruding from the gaps 50 and 50 between the inflator mounting seat 38 and the frame body portion 43 of the two members 37. In the case of the embodiment, the frame body portion 43 has the second member 37 arranged on the outer peripheral side of the first member 31, and the upper and lower centers of the peripheral wall portion 33 (the tip (upper end 33a) side and the bottom of the peripheral wall portion 33). It is arranged at a position closer to the bottom wall portion 32 than the center) between the wall portion 32 side. Specifically, the frame body portion 43 is arranged on the peripheral wall portion 33 at a position about 2/5 from the bottom wall portion 32. Further, the frame body portion 43 is configured to be wide on the vertical direction side, and the width dimension W (see FIG. 8) on the vertical direction side is brought into the inner peripheral surface 44 when the peripheral wall portion 33 is pressed against the inner peripheral surface 44. The size is set so that frictional resistance that can regulate the displacement movement of the peripheral wall portion 33 can be generated between the peripheral wall portion 33 and the pressure contact portion 33b with respect to the inner peripheral surface 44.

枠体部43において左右方向側で対向する部位の上端43a側には、フランジ部43bから連なるようにして、それぞれ、左右の外方に突出するように、取付片46,46が形成されている。この取付片46は、実施形態の場合、前後方向側で3箇所に形成されている(図3,6参照)。取付片46は、エアバッグカバー5の側壁部10における左壁部13と右壁部14との先端側(下端13a,14a側)に形成される取付片13b,14bに取り付けられる部位である。各取付片46には、各取付片13b,14bに形成される貫通孔13c,14cに対応して、ボルト55貫通用の貫通孔46aが、形成されている。 Mounting pieces 46, 46 are formed on the upper end 43a side of the portion of the frame body portion 43 facing each other in the left-right direction so as to be continuous from the flange portion 43b and project outward to the left and right, respectively. .. In the case of the embodiment, the mounting pieces 46 are formed at three positions on the front-rear direction side (see FIGS. 3 and 6). The mounting piece 46 is a portion to be mounted on the mounting pieces 13b, 14b formed on the tip end side (lower end 13a, 14a side) of the left wall portion 13 and the right wall portion 14 in the side wall portion 10 of the airbag cover 5. Each mounting piece 46 is formed with a through hole 46a for penetrating the bolt 55, corresponding to the through holes 13c and 14c formed in the respective mounting pieces 13b and 14b.

枠体部43において前後方向側で対向する部位の上端43a側には、エアバッグカバー5の側壁部10における前壁部11と後壁部12とに形成される係止穴部11b,12bに係止される係止爪部48が、フランジ部43bから外方に突出しつつ先端を下方に向けるようにして、左右方向側で3個ずつ、形成されている(図3,6,7参照)。 On the upper end 43a side of the portion of the frame body portion 43 facing each other in the front-rear direction, the locking holes 11b and 12b formed in the front wall portion 11 and the rear wall portion 12 of the side wall portion 10 of the airbag cover 5 are formed. Three locking claws 48 to be locked are formed on the left-right side so that the tips of the locking claws 48 project downward from the flange portion 43b (see FIGS. 3, 6 and 7). ..

実施形態の第2部材37では、インフレーター取付座38が、ケース30における左右の略中央の領域に配設される構成であることから、ケース30の左側と右側との領域には、第1部材31における底壁部32から周壁部33に連なる領域の一部を部分的に露出させるような隙間50,50が、図3,6に示すように、大きく形成されている構成である。すなわち、実施形態のケース30では、第1部材31において、底壁部32における挿入孔32aの左方から周壁部33の左下半分程度にかけての領域(左側領域31b)、と、底壁部32における挿入孔32aの右方から周壁部の右下半分程度にかけての領域(右側領域31c)と、が、第2部材37の隙間50,50から、大きく露出されている構成である。 In the second member 37 of the embodiment, since the inflator mounting seat 38 is arranged in the substantially central regions on the left and right sides of the case 30, the first member is in the regions on the left and right sides of the case 30. As shown in FIGS. 3 and 6, the gaps 50 and 50 that partially expose a part of the region extending from the bottom wall portion 32 to the peripheral wall portion 33 in 31 are formed to be large. That is, in the case 30 of the embodiment, in the first member 31, the region from the left side of the insertion hole 32a in the bottom wall portion 32 to the lower left half of the peripheral wall portion 33 (left side region 31b) and the bottom wall portion 32. The region (right region 31c) from the right side of the insertion hole 32a to the lower right half of the peripheral wall portion is largely exposed from the gaps 50 and 50 of the second member 37.

また、上述したように、第2部材37の枠体部43は、第1部材31の外周側に第2部材37を配置させた状態で、周壁部33の上下の中央(周壁部33における上端33a側と底壁部32側との間の中央)よりも底壁部32側となる位置に、配置されている。すなわち、第1部材31の周壁部33は、開口31a側となる上側半分程度の領域を、枠体部43よりも上方に突出させて構成されることとなり、この周壁部33における上側部位34は、車両搭載時に、外周側を、エアバッグカバー5の側壁部10により覆われることとなる。詳細には、周壁部33の上端33aは、車両搭載時に、図1,2に示すように、エアバッグカバー5における天井壁部6の下面近傍となる位置に、配置される構成である。そして、周壁部33は、エアバッグ25の展開膨張時に、枠体部43より上方に突出している上側部位34の外周側を、側壁部10により支持されることとなる。 Further, as described above, the frame body portion 43 of the second member 37 has the upper and lower centers of the peripheral wall portion 33 (the upper end of the peripheral wall portion 33) in a state where the second member 37 is arranged on the outer peripheral side of the first member 31. It is arranged at a position closer to the bottom wall portion 32 side than the center) between the 33a side and the bottom wall portion 32 side. That is, the peripheral wall portion 33 of the first member 31 is configured so that the region of about the upper half on the opening 31a side is projected upward from the frame body portion 43, and the upper portion 34 of the peripheral wall portion 33 is formed. When mounted on a vehicle, the outer peripheral side is covered with the side wall portion 10 of the airbag cover 5. Specifically, the upper end 33a of the peripheral wall portion 33 is arranged at a position near the lower surface of the ceiling wall portion 6 of the airbag cover 5 as shown in FIGS. 1 and 2 when the vehicle is mounted. Then, when the airbag 25 is expanded and expanded, the peripheral wall portion 33 is supported by the side wall portion 10 on the outer peripheral side of the upper portion 34 projecting upward from the frame body portion 43.

次に、実施形態のエアバッグ装置Mの車両への搭載について、説明をする。まず、エアバッグ25を、リテーナ19を内部に収納させた状態で、ケース30の第1部材31内に収納可能に折り畳む。そして、折り畳んだエアバッグ25の周囲を、折り崩れしないように、破断可能な図示しないラッピングシートによりくるむ。その後、折り畳んだエアバッグ25を、第2部材37を外周側に重ねた第1部材31内に、底壁部32に載置させるようにして、収納させ、リテーナ19のボルト19aを、第1部材31の底壁部32に形成される取付孔32bと、第2部材37におけるインフレーター取付座38に形成される取付孔38bと、に挿通させる。インフレーター17の本体部17aを、インフレーター取付座38の下方から、第1部材31の底壁部32に形成される挿入孔32aを経てケース30内に挿入させるとともに、インフレーター取付座38から下方に突出しているリテーナ19の各ボルト19aを、インフレーター17のフランジ部17cに挿通させる。その後、インフレーター17のフランジ部17cから突出しているボルト19aにナット20を締結させれば、第1部材31を第2部材37に取り付けてケース30を組み立てることができると同時に、ケース30に、折り畳んだエアバッグ25とインフレーター17とを取り付けることができる。次いで、第2部材37に形成される各係止爪部48を、エアバッグカバー5の側壁部10に形成される係止穴部11b,12bの周縁に係止させ、第2部材37に形成される取付片46の上側に、エアバッグカバー5の側壁部10に形成される取付片13b,14bを重ねた状態で、ボルト55を、貫通孔13c,14c,46aに貫通させて、ナット56止めし、第2部材37の取付片46をエアバッグカバー5の取付片13b,14bに連結させれば、エアバッグカバー5をケース30に取り付けることができて、エアバッグ装置Mを組み立てることができる。その後、エアバッグ装置Mを、図示しないブラケットを用いて、車両のボディ側に固定させれば、エアバッグ装置Mを車両に搭載することができる。 Next, mounting of the airbag device M of the embodiment on a vehicle will be described. First, the airbag 25 is folded so that it can be stored in the first member 31 of the case 30 with the retainer 19 housed inside. Then, the circumference of the folded airbag 25 is wrapped with a foldable wrapping sheet (not shown) so as not to collapse. After that, the folded airbag 25 is stored in the first member 31 in which the second member 37 is overlapped on the outer peripheral side so as to be placed on the bottom wall portion 32, and the bolt 19a of the retainer 19 is first. It is inserted into a mounting hole 32b formed in the bottom wall portion 32 of the member 31 and a mounting hole 38b formed in the inflator mounting seat 38 of the second member 37. The main body 17a of the inflator 17 is inserted into the case 30 from below the inflator mounting seat 38 through the insertion hole 32a formed in the bottom wall portion 32 of the first member 31, and protrudes downward from the inflator mounting seat 38. Each bolt 19a of the retainer 19 is inserted into the flange portion 17c of the inflator 17. After that, if the nut 20 is fastened to the bolt 19a protruding from the flange portion 17c of the inflator 17, the first member 31 can be attached to the second member 37 to assemble the case 30, and at the same time, the case 30 is folded. However, the airbag 25 and the inflator 17 can be attached. Next, each locking claw portion 48 formed on the second member 37 is locked to the peripheral edge of the locking hole portions 11b and 12b formed on the side wall portion 10 of the airbag cover 5 and formed on the second member 37. The bolt 55 is passed through the through holes 13c, 14c, 46a in a state where the mounting pieces 13b, 14b formed on the side wall portion 10 of the airbag cover 5 are overlapped on the upper side of the mounting piece 46 to be formed, and the nut 56. If the attachment piece 46 of the second member 37 is connected to the attachment pieces 13b and 14b of the airbag cover 5, the airbag cover 5 can be attached to the case 30 and the airbag device M can be assembled. it can. After that, if the airbag device M is fixed to the body side of the vehicle by using a bracket (not shown), the airbag device M can be mounted on the vehicle.

エアバッグ装置Mの車両への搭載後、車両の前面衝突時、インフレーター17のガス吐出口17bから膨張用ガスが吐出されれば、エアバッグ25が、内部に膨張用ガスを流入させて膨張し、エアバッグカバー5の扉部7,7を押し開かせることとなる。そして、エアバッグ25は、エアバッグカバー5の扉部7,7を押し開いて形成されるケース30の開口31aから大きく突出しつつ膨張を完了させることとなる(図10参照)。 After the airbag device M is mounted on the vehicle, if the expansion gas is discharged from the gas discharge port 17b of the inflator 17 at the time of a frontal collision of the vehicle, the airbag 25 expands by inflowing the expansion gas into the inside. , The door portions 7 and 7 of the airbag cover 5 are pushed open. Then, the airbag 25 completes the expansion while greatly protruding from the opening 31a of the case 30 formed by pushing open the door portions 7 and 7 of the airbag cover 5 (see FIG. 10).

そして、実施形態のエアバッグ装置Mでは、エアバッグ25の膨張時に、ケース30において可撓性を有したシート体から構成される第1部材31は、ケース30内において膨張するエアバッグ25により、外方へ押圧されるような態様となるが、このとき、第1部材31の周壁部33が、第1部材31よりも剛性の高い材料から形成される第2部材32において、第1部材31の周壁部33の外周側を囲むように配置される枠体部43に、圧接されることとなる。詳細に説明すれば、実施形態のエアバッグ装置Mでは、インフレーター17からの膨張用ガスGを内部に流入させて膨張するエアバッグ25は、図9に概略的に示すように、まず、第1部材31全体を外方に押圧するように、ケース30内で充満することとなり、このとき、第1部材31の周壁部33が、枠体部43に圧接されることとなる。そして、この周壁部33の枠体部43への圧接部位33bの圧接状態が維持されることから、実施形態のエアバッグ装置では、第2部材37が、インフレーター取付座38と枠体部43との間に第1部材31を露出させるような隙間50,50を有する構成であるが、エアバッグ25のケース30内での膨張時に、第1部材31が、底壁部32から周壁部33に連なる領域の一部(左側領域31b,右側領域31c)を、第2部材37の隙間50,50から突出させるように変形しようとしても、枠体部43が、周壁部33を圧接させることにより、周壁部33の枠体部43に対するずれ移動を規制することとなって、第1部材31において、底壁部32から周壁部33に連なる領域(左側領域31b,右側領域31c)が、インフレーター取付座38と枠体部43との間の隙間50,50から突出するように変形することを、防止できる。そのため、実施形態のエアバッグ装置では、第2部材37が、インフレーター取付座38と枠体部43との間に隙間50,50を有し、第1部材31の一部(左側領域31b,右側領域31c)を露出させる構成であっても、エアバッグ25が、ケース30内において膨張する膨張初期に、第2部材37の枠体部43により、第2部材37の隙間50,50から露出している領域(左側領域31b,右側領域31c)を、図10の二点鎖線に示すごとく大きく変形させることを抑制でき、内部に膨張用ガスを流入させて膨張するエアバッグ25を、ケース30の開口31aから迅速に突出させることができる。さらに、実施形態のエアバッグ装置Mでは、剛性の高い材料から形成される第2部材37を、インフレーター取付座38と、枠体部43と、インフレーター取付座38から延びてインフレーター取付座38と枠体部43とを連結させる連結部40と、を有する構成として、インフレーター取付座38と枠体部43との間に、部材を設けず、隙間50,50を有する構成とされていることから、従来のエアバッグ装置に対して遜色なく、軽量化を図ることができる。 Then, in the airbag device M of the embodiment, when the airbag 25 is inflated, the first member 31 made of a flexible seat body in the case 30 is subjected to the inflatable airbag 25 in the case 30. At this time, the peripheral wall portion 33 of the first member 31 is formed of a material having a higher rigidity than the first member 31, and the first member 31 is pressed outward. It will be pressure-welded to the frame body portion 43 arranged so as to surround the outer peripheral side of the peripheral wall portion 33. To be described in detail, in the airbag device M of the embodiment, the airbag 25 that expands by inflowing the expansion gas G from the inflator 17 into the inside is first, as is schematically shown in FIG. The case 30 is filled so as to press the entire member 31 outward, and at this time, the peripheral wall portion 33 of the first member 31 is pressed against the frame body portion 43. Then, since the pressure contact state of the pressure contact portion 33b to the frame body portion 43 of the peripheral wall portion 33 is maintained, in the airbag device of the embodiment, the second member 37 is the inflator mounting seat 38 and the frame body portion 43. Although the structure has gaps 50 and 50 that expose the first member 31 between the airbags, the first member 31 moves from the bottom wall portion 32 to the peripheral wall portion 33 when the airbag 25 expands in the case 30. Even if a part of the continuous region (left side region 31b, right side region 31c) is deformed so as to protrude from the gaps 50 and 50 of the second member 37, the frame body portion 43 presses and contacts the peripheral wall portion 33. By restricting the displacement movement of the peripheral wall portion 33 with respect to the frame body portion 43, in the first member 31, the region (left side region 31b, right side region 31c) extending from the bottom wall portion 32 to the peripheral wall portion 33 is the inflator mounting seat. It is possible to prevent the deformation so as to protrude from the gaps 50 and 50 between the 38 and the frame body portion 43. Therefore, in the airbag device of the embodiment, the second member 37 has gaps 50 and 50 between the inflator mounting seat 38 and the frame body portion 43, and a part of the first member 31 (left side region 31b, right side). Even if the region 31c) is exposed, the airbag 25 is exposed from the gaps 50 and 50 of the second member 37 by the frame body portion 43 of the second member 37 at the initial stage of expansion in the case 30. As shown by the alternate long and short dash line in FIG. 10, it is possible to prevent the region (left region 31b, right region 31c) from being significantly deformed, and the airbag 25 that expands by inflowing expansion gas into the case 30 It can be quickly projected from the opening 31a. Further, in the airbag device M of the embodiment, the second member 37 formed of a highly rigid material is extended from the inflator mounting seat 38, the frame body portion 43, and the inflator mounting seat 38 to the inflator mounting seat 38 and the frame. As a configuration having a connecting portion 40 for connecting the body portion 43, no member is provided between the inflator mounting seat 38 and the frame body portion 43, and the gaps 50 and 50 are provided. The weight can be reduced as much as the conventional airbag device.

したがって、実施形態のエアバッグ装置Mでは、軽量化を図ることができて、かつ、エアバッグ25を迅速に膨張させることができる。 Therefore, in the airbag device M of the embodiment, the weight can be reduced and the airbag 25 can be rapidly inflated.

また、実施形態のエアバッグ装置Mでは、枠体部43が、周壁部33における先端(上端33a)側と底壁部32側との間の中央よりも底壁部32側となる位置に、配置される構成である。すなわち、実施形態では、枠体部43は、周壁部33における上下の中央よりも底壁部32側となる位置に、配置される構成である。そのため、エアバッグ25の膨張初期に、膨張するエアバッグ25が、周壁部33において、枠体部43よりも先端(上端33a)側の領域となる上側部位34を外方に向かって押圧して、この周壁部33における枠体部43よりも先端(上端33a)側の上側部位34を、図9に示すように、枠体部43よりも外方に突出させることとなり、この上側部位34が枠体部43の上縁(上端43a)に係止されて、周壁部33の枠体部43に対する移動を規制するような態様となることから、第1部材31において枠体部43よりも底壁部32側の領域(左側領域31b,右側領域31c)が、インフレーター取付座38と枠体部43との間の隙間50,50から突出するように変形することを、一層的確に防止できる。なお、このような点を考慮しなければ、第1部材において第2部材の隙間から露出している領域を、枠体部の内周面の移動規制によって、この隙間からの突出を規制可能であれば、第1部材の枠体を、周壁部の開口側に配設させる構成としてもよい。このような枠体部の内周面の移動規制は、例えば、枠体部の内周面の摩擦抵抗を増大させるために、内周面に凹凸を設けることにより、設定してもよい。 Further, in the airbag device M of the embodiment, the frame body portion 43 is located at a position closer to the bottom wall portion 32 than the center between the tip end (upper end 33a) side and the bottom wall portion 32 side of the peripheral wall portion 33. It is a configuration to be arranged. That is, in the embodiment, the frame body portion 43 is arranged at a position closer to the bottom wall portion 32 than the upper and lower centers of the peripheral wall portion 33. Therefore, at the initial stage of expansion of the airbag 25, the expanding airbag 25 presses the upper portion 34, which is a region on the tip end (upper end 33a) side of the frame body portion 43, outward on the peripheral wall portion 33. As shown in FIG. 9, the upper portion 34 of the peripheral wall portion 33 on the tip (upper end 33a) side of the frame body portion 43 is projected outward from the frame body portion 43, and the upper portion 34 Since it is locked to the upper edge (upper end 43a) of the frame body portion 43 to restrict the movement of the peripheral wall portion 33 with respect to the frame body portion 43, the first member 31 has a bottom rather than the frame body portion 43. It is possible to more accurately prevent the region on the wall portion 32 side (left side region 31b, right side region 31c) from being deformed so as to protrude from the gaps 50 and 50 between the inflator mounting seat 38 and the frame body portion 43. If such a point is not taken into consideration, the region of the first member exposed from the gap of the second member can be restricted from protruding from the gap by restricting the movement of the inner peripheral surface of the frame body portion. If there is, the frame body of the first member may be arranged on the opening side of the peripheral wall portion. Such movement restrictions on the inner peripheral surface of the frame body may be set, for example, by providing irregularities on the inner peripheral surface in order to increase the frictional resistance of the inner peripheral surface of the frame body.

さらに、実施形態のエアバッグ装置Mでは、第1部材31が、エアバッグ25及びインフレーター17とともに、第2部材37のインフレーター取付座38に取り付けられる構成であることから、インフレーター17を利用して、第1部材31を第2部材37に取り付けることができ、第1部材31を第2部材37に別途取り付けることが不要となる。なお、このような点を考慮しなければ、インフレーター取付座以外の部位で、第1部材を、別途取付手段を用いて、第2部材に取り付ける構成としてもよい。 Further, in the airbag device M of the embodiment, since the first member 31 is attached to the inflator mounting seat 38 of the second member 37 together with the airbag 25 and the inflator 17, the inflator 17 is used. The first member 31 can be attached to the second member 37, and it is not necessary to separately attach the first member 31 to the second member 37. If such a point is not taken into consideration, the first member may be attached to the second member at a portion other than the inflator attachment seat by using a separate attachment means.

さらに、実施形態のエアバッグ装置Mでは、折り畳まれたエアバッグ25を覆うエアバッグカバー5の側壁部10が、エアバッグ25の展開膨張時に、第1部材31における周壁部33の外周側を支持可能に構成されている。特に、実施形態では、エアバッグカバー5の側壁部10は、第1部材31の周壁部33において、第2部材37の枠体部43より上側に突出している領域(上側部位34)の外周側を、全面にわたって覆うように、構成されている。そのため、エアバッグ25の膨張初期に、第1部材31の周壁部33において、枠体部43と開口31aとの間の領域(上側部位34)が、外周側を、エアバッグカバー5の側壁部10に支持されることから、周壁部33が、その外周側を、枠体部43とエアバッグカバー5の側壁部10との広い面積に圧接されて、一層、ずれ移動を規制されることとなり、また、この上側部位34の領域が、例えば、口開きするように変形することも抑制できて、エアバッグ25の膨張初期に、膨張するエアバッグ25が第1部材31を変形させることを、極力抑制でき、エアバッグ25の内部に流入した膨張用ガスの内圧により、開口31aを覆う天井壁部6を円滑に押圧することができる。その結果、天井壁部6に形成される破断予定部8を、円滑に破断させて、扉部7,7を円滑に開かせ、エアバッグ25を突出させることができ、エアバッグ25を一層迅速に膨張させることが可能となる。特に、実施形態のエアバッグ装置Mでは、周壁部33の上端33aが、天井壁部6近傍に配設される構成であることから、膨張するエアバッグ25が、天井壁部6を一層的確に押圧することができる。なお、このような点を考慮しなければ、エアバッグカバーの側壁部によって、ケースの第1部材の周壁部の外周側を支持させる構成としなくともよい。また、実施形態では、側壁部10は、周壁部33において枠体部43より上側に位置する上側部位34の外周側を、全面にわたって覆う構成であるが、周壁部の外周側を支持可能であれば、エアバッグカバーの側壁部を、上側部位の外周側を部分的にわたって覆うような構成としてもよい。 Further, in the airbag device M of the embodiment, the side wall portion 10 of the airbag cover 5 covering the folded airbag 25 supports the outer peripheral side of the peripheral wall portion 33 of the first member 31 when the airbag 25 is expanded and expanded. It is configured to be possible. In particular, in the embodiment, the side wall portion 10 of the airbag cover 5 is on the outer peripheral side of the peripheral wall portion 33 of the first member 31 and the region (upper portion 34) protruding upward from the frame body portion 43 of the second member 37. Is configured to cover the entire surface. Therefore, at the initial stage of expansion of the airbag 25, in the peripheral wall portion 33 of the first member 31, the region (upper side portion 34) between the frame body portion 43 and the opening 31a has the outer peripheral side as the side wall portion of the airbag cover 5. Since it is supported by 10, the peripheral wall portion 33 is pressed against the wide area of the frame body portion 43 and the side wall portion 10 of the airbag cover 5 on the outer peripheral side thereof, and the displacement movement is further restricted. In addition, the region of the upper portion 34 can be suppressed from being deformed so as to open the mouth, for example, and the expanding airbag 25 deforms the first member 31 at the initial stage of expansion of the airbag 25. It can be suppressed as much as possible, and the ceiling wall portion 6 covering the opening 31a can be smoothly pressed by the internal pressure of the expansion gas flowing into the inside of the airbag 25. As a result, the planned breakage portion 8 formed in the ceiling wall portion 6 can be smoothly broken, the door portions 7 and 7 can be smoothly opened, and the airbag 25 can be projected, so that the airbag 25 can be more quickly broken. Can be expanded to. In particular, in the airbag device M of the embodiment, since the upper end 33a of the peripheral wall portion 33 is arranged in the vicinity of the ceiling wall portion 6, the expanding airbag 25 more accurately covers the ceiling wall portion 6. Can be pressed. If such a point is not taken into consideration, it is not necessary to support the outer peripheral side of the peripheral wall portion of the first member of the case by the side wall portion of the airbag cover. Further, in the embodiment, the side wall portion 10 is configured to cover the outer peripheral side of the upper portion 34 located above the frame body portion 43 in the peripheral wall portion 33 over the entire surface, but the outer peripheral side of the peripheral wall portion can be supported. For example, the side wall portion of the airbag cover may be configured to partially cover the outer peripheral side of the upper portion.

なお、実施形態では、エアバッグ装置として、助手席用エアバッグ装置を例に採り説明したが、本発明は、助手席用エアバッグ装置に限られるものではなく、ステアリングホイール用のエアバッグ装置や、膝保護用のエアバッグ装置等にも適用可能である。 In the embodiment, the passenger airbag device has been described as an example of the airbag device, but the present invention is not limited to the passenger airbag device, and the airbag device for the steering wheel and the like. It can also be applied to airbag devices for knee protection.

5…エアバッグカバー、6…天井壁部、7…扉部、8…破断予定部、10…側壁部、17…インフレーター、19…リテーナ、25…エアバッグ、30…ケース、31…第1部材、31a…開口、32…底壁部、33…周壁部、33a…上端(先端)、33b…圧接部位、34…上側部位、37…第2部材、38…インフレーター取付座、40…連結部、43…枠体部、44…内周面、50…隙間、M…助手席用エアバッグ装置。 5 ... Airbag cover, 6 ... Ceiling wall part, 7 ... Door part, 8 ... Breaking part, 10 ... Side wall part, 17 ... Inflator, 19 ... Retainer, 25 ... Airbag, 30 ... Case, 31 ... First member , 31a ... opening, 32 ... bottom wall, 33 ... peripheral wall, 33a ... upper end (tip), 33b ... pressure welding part, 34 ... upper part, 37 ... second member, 38 ... inflator mounting seat, 40 ... connecting part, 43 ... Frame body, 44 ... Inner peripheral surface, 50 ... Gap, M ... Airbag device for passenger seat.

Claims (4)

折り畳まれたエアバッグと、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収納して保持するケースと、を備える構成とされて、
該ケースが、可撓性を有したシート体から形成される第1部材と、該第1部材よりも剛性の高い材料から形成される第2部材と、の2部材から構成されるエアバッグ装置であって、
前記第1部材が、底壁部と、該底壁部から延びる略筒状の周壁部と、を備えるとともに、前記周壁部の先端側を開口させて、折り畳まれた前記エアバッグを収納可能な略箱形状として構成され、
前記第2部材が、前記底壁部の下面側に配置されて前記インフレーターを取り付けるインフレーター取付座と、前記周壁部の外周側を前記周壁部の周方向に略沿って連続的に枠状に囲むように配置される枠体部と、前記インフレーター取付座から延びて前記インフレーター取付座と前記枠体部とを連結させる連結部と、を有するとともに、前記インフレーター取付座と前記枠体部との間に、前記第1部材における前記底壁部から前記周壁部に連なる領域の一部を部分的に露出させるような隙間を、設ける構成とされ、
前記枠体部が、前記エアバッグの膨張時に、前記第1部材の前記隙間からの突出を抑制可能に、前記枠体部に対する前記周壁部の圧接部位のずれ移動を抑制するように配設されていることを特徴とするエアバッグ装置。
It is configured to include a folded airbag, an inflator that supplies an expansion gas to the airbag, and a case that stores and holds the airbag and the inflator.
An airbag device in which the case is composed of two members, a first member formed of a flexible sheet body and a second member formed of a material having a higher rigidity than the first member. And
The first member includes a bottom wall portion and a substantially tubular peripheral wall portion extending from the bottom wall portion, and can store the folded airbag by opening the tip end side of the peripheral wall portion. Constructed as a box shape,
The second member is arranged on the lower surface side of the bottom wall portion and continuously surrounds the inflator mounting seat for mounting the inflator and the outer peripheral side of the peripheral wall portion substantially along the circumferential direction of the peripheral wall portion in a frame shape. It has a frame body portion arranged in such a manner, a connecting portion extending from the inflator mounting seat and connecting the inflator mounting seat and the frame body portion, and between the inflator mounting seat and the frame body portion. In addition, a gap is provided so as to partially expose a part of the region of the first member that is connected to the peripheral wall portion from the bottom wall portion.
The frame body portion is arranged so as to be able to suppress the protrusion of the first member from the gap when the airbag is expanded, and to suppress the displacement movement of the pressure contact portion of the peripheral wall portion with respect to the frame body portion. An airbag device characterized by being
前記枠体部が、前記周壁部における先端側と前記底壁部側との間の中央よりも前記底壁部側となる位置に、配置される構成と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 claim is characterized in that the frame body portion is arranged at a position closer to the bottom wall portion than the center between the tip end side and the bottom wall portion side of the peripheral wall portion. The airbag device according to 1. 前記第1部材が、前記エアバッグ及び前記インフレーターとともに、前記インフレーター取付座に取り付けられる構成とされていることを特徴とする請求項1または2に記載のエアバッグ装置。 The airbag device according to claim 1 or 2, wherein the first member is configured to be attached to the inflator mounting seat together with the airbag and the inflator. 折り畳まれた前記エアバッグを覆うエアバッグカバーが、前記開口を覆う天井壁部と、該天井壁部から延びて先端側を前記枠体部に連結されるとともに前記略筒状の側壁部と、を備える構成とされ、
前記天井壁部が、周囲に前記エアバッグの膨張時に破断可能とされる破断予定部を配置させて、前記エアバッグの展開膨張時に開き可能に構成される扉部を、備える構成とされ、
該側壁部が、前記エアバッグの展開膨張時に、前記枠体部より先端側の前記周壁部の外周側を支持可能に構成されていることを特徴とする請求項1乃至3のいずれか1項に記載のエアバッグ装置。
An airbag cover that covers the folded airbag includes a ceiling wall portion that covers the opening, and a substantially tubular side wall portion that extends from the ceiling wall portion and is connected to the frame body portion on the tip end side. It is configured to have
The ceiling wall portion is configured to include a door portion that is configured to be openable when the airbag is expanded and expanded by arranging a fractured portion that is rupturable when the airbag is expanded and expanded around the ceiling wall portion.
Any one of claims 1 to 3, wherein the side wall portion is configured to be able to support the outer peripheral side of the peripheral wall portion on the tip end side of the frame body portion when the airbag is expanded and expanded. The airbag device described in.
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