JP2019038399A - Air bag - Google Patents

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JP2019038399A
JP2019038399A JP2017162307A JP2017162307A JP2019038399A JP 2019038399 A JP2019038399 A JP 2019038399A JP 2017162307 A JP2017162307 A JP 2017162307A JP 2017162307 A JP2017162307 A JP 2017162307A JP 2019038399 A JP2019038399 A JP 2019038399A
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side wall
vehicle body
outer peripheral
airbag
wall portion
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JP6806005B2 (en
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石黒　直彦
Naohiko Ishiguro
直彦 石黒
渉 三浦
Wataru Miura
渉 三浦
雅美 柴田
Masami Shibata
雅美 柴田
良太郎 石田
Ryotaro Ishida
良太郎 石田
弘幸 中西
Hiroyuki Nakanishi
弘幸 中西
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Toyoda Gosei Co Ltd
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Abstract

To provide an air bag capable of securing an expansion height in expansion completion and also receiving a passenger in a wide planar region.SOLUTION: An air bag comprises a passenger-side wall part 32 having a reception expected part 34 for receiving a passenger and a vehicle body-side wall part 22 having an inflow opening 24 for expansion gas, and also has an outer peripheral wall constituted by coupling outer peripheral edges 32b, 23 of the passenger-side side wall part and vehicle body-side wall part to each other. The vehicle body side wall part has an expanded-diameter part 44 having a size r1 from the inflow opening to the outer peripheral edge made larger than a size r0 from nearby the center of the passenger side wall part having been expanded flatly to the outer peripheral edge of the passenger side wall part corresponding to the direction from the inflow opening to the outer peripheral edge in a state in which base cloth 42 for vehicle body side wall part is expanded flatly before coupling to the passenger side wall part. Further, a contraction region 48 which is adjusted in size to be coupled to the outer peripheral edge of the passenger side wall part in such a case is arranged at an outer peripheral edge 43 of the base cloth for vehicle body side wall part connecting with the expanded-diameter part, and coupled to the outer peripheral edge of the passenger side wall part.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使用され、車両の衝突時に好適に運転者や助手席搭乗者等の乗員を受け止めて保護できるエアバッグに関する。   The present invention relates to an airbag that can be used in an airbag device mounted on a vehicle and can receive and protect a passenger such as a driver or a passenger on a passenger seat when a vehicle collides.

従来のエアバッグとしては、中央付近に乗員を受け止めるための受止予定部を有した乗員側壁部と、中央付近に膨張用ガスを流入させるための流入用開口を有した車体側壁部と、を備えて構成されるとともに、乗員側壁部と車体側壁部との外周縁相互を結合させて外周壁を構成するものがあった（例えば、特許文献１）。このエアバッグでは、結合前の乗員側壁部と車体側壁部とが、共に、円板状としているものの、乗員側壁部が大径の円板状としており、乗員側壁部の外周縁を、縮めるように、いせこみしつつ、車体側壁部の外周縁と結合させて、形成されていた。このエアバッグでは、乗員側壁部が大きな面積であることから、乗員側壁部の受止予定部が、大きく凸状に突出する形状として、膨張を完了させていた。   As a conventional airbag, an occupant side wall portion having a planned receiving portion for receiving an occupant near the center, and a vehicle body side wall portion having an inflow opening for allowing inflation gas to flow near the center, In addition to being configured, the outer peripheral wall is configured by coupling the outer peripheral edges of the occupant side wall and the vehicle body side wall (for example, Patent Document 1). In this airbag, the occupant side wall portion and the vehicle body side wall portion before joining are both disk-shaped, but the occupant side wall portion is a large-diameter disk shape so that the outer peripheral edge of the occupant side wall portion is reduced. In addition, it is formed by being combined with the outer peripheral edge of the side wall of the vehicle body while being intruded. In this airbag, since the occupant side wall portion has a large area, the receiving scheduled portion of the occupant side wall portion has been inflated as a shape protruding greatly in a convex shape.

特開平７−１７２２５７号公報JP 7-172257 A

しかし、従来のエアバッグでは、膨張完了時の乗員側壁部が、迅速に、乗員を受け止めることができるように、展開高さを確保して乗員側に大きく突出しているものの、受止予定部が乗員側に丸く突出する形状としていることから、反力を低減できるように、広い平面状部位により乗員を受け止める点に、改善の余地があった。   However, in the conventional airbag, the occupant side wall portion at the time of completion of inflation is projected to a large extent toward the occupant side with a deployment height so that the occupant side can be quickly received, but the planned receiving portion is not Since it has a shape protruding round to the occupant side, there is room for improvement in that the occupant is received by a wide planar portion so that the reaction force can be reduced.

本発明は、上述の課題を解決するものであり、膨張完了時の展開高さを確保できるとともに、広い平面状部位により乗員を受止可能なエアバッグを提供することを目的とする。   The present invention solves the above-described problems, and an object of the present invention is to provide an airbag that can secure a deployment height when inflation is completed and can receive an occupant with a wide planar portion.

本発明に係るエアバッグは、中央付近に乗員を受け止めるための受止予定部を有した乗員側壁部と、中央付近に膨張用ガスを流入させるための流入用開口を有した車体側壁部と、を備えて構成されるとともに、前記乗員側壁部と前記車体側壁部との外周縁相互を結合させて外周壁が構成されるエアバッグであって、
前記車体側壁部が、
前記乗員側壁部との結合前における車体側壁部用基布を平らに展開した状態として、前記流入用開口から外周縁までの寸法を、平らに展開した前記乗員側壁部の中央付近から、前記流入用開口から前記外周縁までの方向に対応した前記乗員側壁部の外周縁までの寸法より、大きくした拡径部、を有して構成されるとともに、
該拡径部に連なる前記車体側壁部用基布の外周縁に、前記乗員側壁部の外周縁との結合時に、前記乗員側壁部の外周縁と結合可能に寸法を合わせる収縮部位を配設させて、前記乗員側壁部の外周縁と結合されていることを特徴とする。 An airbag according to the present invention includes an occupant side wall portion having a receiving portion for receiving an occupant near the center, a vehicle body side wall portion having an inflow opening for allowing inflation gas to flow near the center, And an airbag having an outer peripheral wall formed by combining outer peripheral edges of the occupant side wall and the vehicle body side wall,
The side wall of the vehicle body is
In the state where the vehicle body side wall base fabric is unfolded flatly before being joined to the occupant side wall, the inflow from the inflow opening to the outer peripheral edge is measured from the center of the flat fold out occupant side wall. And having an enlarged diameter portion larger than the dimension from the opening to the outer periphery of the occupant side wall corresponding to the direction from the outer periphery,
On the outer peripheral edge of the vehicle body side wall portion base fabric connected to the enlarged diameter portion, a contraction portion that is dimensioned so as to be connectable with the outer peripheral edge of the occupant side wall portion is disposed at the time of connection with the outer peripheral edge of the occupant side wall portion. And it is combined with the outer periphery of the said passenger | crew side wall part, It is characterized by the above-mentioned.

本発明に係るエアバッグでは、車体側壁部が、流入用開口の周囲で、乗員側壁部の中央付近の受止予定部から外周縁までの寸法より大きくした拡径部を備えており、乗員側壁部より寸法を大きくする拡径部の膜長（周壁）の余裕分、乗員側壁部の展開高さを大きく確保できる。また、乗員側壁部は、単に、外周縁を、収縮部位を設けた車体側壁部の外周縁に結合させているだけであって、膨張完了時の中央付近の受止予定部を、極力、平坦状に維持でき、受け止める乗員を、広い平面状部位の受止予定部によって、受け止めることができる。   In the airbag according to the present invention, the vehicle body side wall portion includes an enlarged-diameter portion that is larger than the dimension from the planned receiving portion to the outer peripheral edge near the center of the occupant side wall portion around the inflow opening. The expansion height of the passenger side wall portion can be ensured by a margin of the film length (peripheral wall) of the enlarged diameter portion that is larger than the portion. In addition, the occupant side wall simply connects the outer peripheral edge to the outer peripheral edge of the vehicle body side wall provided with the contracted portion, and the receiving portion near the center at the completion of the expansion is made as flat as possible. The occupant who can be maintained and received can be received by the receiving scheduled portion of the wide planar portion.

したがって、本発明に係るエアバッグでは、膨張完了時の展開高さを確保できるとともに、広い平面状部位により乗員を受け止めることができる。   Therefore, in the airbag according to the present invention, it is possible to secure a deployment height at the completion of inflation and to catch an occupant with a wide planar portion.

本発明に係るエアバッグでは、前記収縮部位が、前記乗員側壁部の外周縁と前記車体側壁部の外周縁とを平らに重ねて結合可能とするように、配設されていることが望ましい。   In the airbag according to the present invention, it is desirable that the contracted portion is disposed so that the outer peripheral edge of the occupant side wall portion and the outer peripheral edge of the vehicle body side wall portion can be overlapped and joined together.

このような構成であれば、エアバッグの外周壁を構成するように、乗員側壁部と車体側壁部との外周縁相互を結合させる際、外周縁相互を平らに重ねて、工業用ミシン等を利用した平面縫製等により、簡便に結合できることから、乗員側壁部と車体側壁部との外周縁相互の結合作業が容易となって、エアバッグの外周壁の製造を効率的に行うことができる。   With such a configuration, when the outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion are joined to each other so as to constitute the outer peripheral wall of the airbag, the outer peripheral edges are overlapped flatly, and an industrial sewing machine or the like is attached. Since it can be simply combined by utilizing the flat surface sewing or the like, it is possible to easily combine the outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion, and to efficiently manufacture the outer peripheral wall of the airbag.

この場合、前記収縮部位が、前記乗員側壁部との結合前における平らに展開した前記車体側壁部用基布の外周縁に設けられた略Ｖ字状の切欠きにおける対向する両縁を、相互に結合させてなる切欠き塞ぎ用結合部、として構成されていることが望ましい。   In this case, the contracted portions are opposite to each other in the substantially V-shaped notch provided on the outer peripheral edge of the vehicle body side wall base fabric that is unfolded flat before joining with the passenger side wall. It is desirable that it is configured as a notch-closing coupling portion that is coupled to the.

このような構成では、車体側壁部が、切欠き塞ぎ用結合部を設けた切欠きの底部（先端）付近の膨張完了形状を、切欠きの底部を頂部とした略円錐状の突条部として膨張する。そのため、エアバッグの膨張完了時における車体側壁部における切欠き塞ぎ用結合部付近では、乗員側壁部の外周縁から流入用開口側に延びる形状として、単に、流入用開口側に曲面状に窄まるのではなく、乗員側壁部の外周縁から流入用開口の中心軸に沿うように、切欠き塞ぎ用結合部に沿って下方側に延び、略円錐状の突条部の頂点（切欠きの底部）で曲がって、乗員側壁部の受止予定部に沿うような面として、流入用開口側に延びる形状となる。すなわち、車体側壁部の外周縁付近の切欠き塞ぎ用結合部が、流入用開口の中心軸に沿うように、下方側に延びる厚肉の張出部を形成して、容積を増大させ、エアバッグを収納していた収納部位の周縁に対して、張出部の流入用開口側の面を、張り付かせるように、接触させ易くなる。そのため、エアバッグが膨張を完了させれば、切欠き塞ぎ用結合部によって形成される張出部の流入用開口側の面を、収納部位側の周縁に支持させ易くなり、エアバッグの乗員受止時における反力を迅速に確保可能となる。その結果、このような構成のエアバッグでは、膨張完了時、拡径部を設けたことによる展開高さを確保できるとともに、張出部の流入用開口側の面が、収納部位の周縁から安定した支持を確保できて、乗員を迅速かつ安定して受け止めることが可能となる。   In such a configuration, the vehicle body side wall portion has an expansion completion shape near the bottom (tip) of the notch provided with the notch closing coupling portion as a substantially conical ridge with the bottom of the notch as the top. Inflate. Therefore, in the vicinity of the notch-closing coupling portion in the vehicle body side wall when the airbag is completely inflated, the shape extends from the outer peripheral edge of the occupant side wall to the inflow opening, and is simply constricted on the inflow opening. Rather than extending from the outer periphery of the occupant side wall along the central axis of the inflow opening, it extends downward along the notch closing joint, and is the apex of the substantially conical ridge (the bottom of the notch). ), And a shape extending along the inflow opening side as a surface along the planned receiving portion of the occupant side wall. That is, the notch-closing coupling portion in the vicinity of the outer peripheral edge of the vehicle body side wall portion forms a thick overhanging portion extending downward along the central axis of the inflow opening to increase the volume, The surface on the inflow opening side of the overhanging portion can be easily brought into contact with the peripheral edge of the storage portion storing the bag. For this reason, when the airbag is completely inflated, the surface on the inflow opening side of the overhang portion formed by the notch closing coupling portion can be easily supported on the peripheral edge on the storage site side, and the The reaction force at the time of stopping can be secured quickly. As a result, in the airbag having such a configuration, when the inflation is completed, the deployment height due to the provision of the enlarged diameter portion can be secured, and the surface on the inflow opening side of the overhanging portion is stable from the periphery of the storage portion. It is possible to secure the support and to catch the occupant quickly and stably.

そして、本発明に係るエアバッグとしては、前記収縮部位は、前記車体側壁部の外周縁に、一つ形成するだけでもよいが、複数配設されていてもよい。   And as an airbag which concerns on this invention, although the said shrinkage | contraction part may just be formed in the outer periphery of the said vehicle body side wall part, multiple pieces may be arrange | positioned.

すなわち、収縮部位は、拡径部に連なる車体側壁部の外周縁に設けられており、収縮部位が多ければ、展開高さを確保できる拡径部による膜長の余裕分を増加させることができて、膨張完了時のエアバッグの展開高さを、乗員側壁部の全域にわたって、安定して高く確保可能となる。   In other words, the contraction site is provided on the outer peripheral edge of the side wall portion of the vehicle body that continues to the enlarged diameter portion. If there are many contraction sites, the margin of the film length by the enlarged diameter portion that can secure the development height can be increased. Thus, the deployment height of the airbag when the inflation is completed can be secured stably over the entire area of the occupant side wall.

また、本発明に係るエアバッグでは、ステアリングホイールにおける乗員としての運転者が把持するリング部の中央のボス部に、折り畳まれて収納され、膨張時の前記乗員側壁部の前記受止予定部が、運転者を受け止めるように配設されるような運転席用エアバッグとして、構成することができる。   In the airbag according to the present invention, the steering wheel is folded and stored in a boss portion at the center of the ring portion gripped by the driver as an occupant, and the scheduled reception portion of the occupant side wall portion when inflated is The driver's seat airbag can be configured so as to receive the driver.

そして、本発明に係るエアバッグが運転席用エアバッグとして構成される場合には、前記収縮部位は、前記乗員側壁部との結合前における平らに展開した前記車体側壁部用基布の外周縁に設けられた略Ｖ字状の切欠きにおける対向する両縁を、相互に結合させてなる切欠き塞ぎ用結合部、として構成されるとともに、
膨張完了時に、前記切欠きの底部が、前記リング部の外方側に、配設される構成としていることが望ましい。 And when the airbag which concerns on this invention is comprised as a driver's seat airbag, the said shrinkage | contraction part is the outer periphery of the base fabric for the said vehicle body side wall part developed flatly before the coupling | bonding with the said passenger | crew side wall part. And is configured as a notch-closing coupling portion formed by coupling the opposing edges of the substantially V-shaped notch provided to each other,
It is desirable that the bottom portion of the notch be disposed on the outer side of the ring portion when the expansion is completed.

このような構成では、エアバッグが膨張を完了させれば、切欠き塞ぎ用結合部による張出部の流入用開口側の面が、リング部の上面側における内周側から外周側にわたって張り付くように配置されて、リング部による支持が安定して、高い展開高さと相俟って、運転者を安定して受け止めることができる。   In such a configuration, when the airbag is completely inflated, the surface on the inflow opening side of the overhanging portion by the notch closing coupling portion sticks from the inner peripheral side to the outer peripheral side on the upper surface side of the ring portion. Therefore, the support by the ring portion is stable, and the driver can be stably received in combination with the high deployment height.

この場合、前記収縮部位が、膨張完了時の前記車体側壁部の外周縁の前後に、配設されていれば、エアバッグが膨張する際における車両の衝突時、膨張完了時のエアバッグは、前後両側でリング部に安定して支持され、前方移動してくる運転者を、乗員側壁部の受止予定部によって、安定して受け止めて保護することができる。   In this case, if the contracted portion is disposed before and after the outer peripheral edge of the vehicle body side wall portion at the time of completion of inflation, the airbag at the time of completion of inflation when the vehicle collides when the airbag is inflated, A driver who is stably supported by the ring portion on both the front and rear sides and moves forward can be stably received and protected by the scheduled receiving portion of the occupant side wall portion.

さらにこの場合、前記収縮部位が、膨張完了時の前記車体側壁部の外周縁の左右にも、配設されていれば、膨張完了時のエアバッグは、前後左右の略全域にわたってリング部に安定して支持されることとなり、前方移動してくる運転者が左右にずれても、乗員側壁部の受止予定部によって、安定した状態で、運転者を受け止めて保護することができる。   Further, in this case, if the contracted portion is also provided on the left and right sides of the outer peripheral edge of the vehicle body side wall portion when the inflation is completed, the airbag when the inflation is completed is stable on the ring portion over substantially the entire front, rear, left and right. Thus, even if the driver moving forward moves to the left or right, the driver can receive and protect the driver in a stable state by the scheduled receiving portion of the occupant side wall.

そして、本発明に係るエアバッグでは、助手席前方の車体側部位に、折り畳まれて収納され、膨張時の前記乗員側壁部の前記受止予定部が、乗員としての助手席搭乗者を受け止めるように配設される助手席用エアバッグとして、構成することもできる。   And in the airbag which concerns on this invention, it is folded and accommodated in the vehicle body side site | part ahead of a passenger seat, and the said to-be-received part of the said passenger | crew side wall part at the time of expansion | swelling seems to receive the passenger of the passenger seat as a passenger | crew It can also be configured as a passenger seat airbag disposed in the vehicle.

さらに、本発明に係るエアバッグでは、膨張完了時の前記車体側壁部の前記流入用開口の周縁と前記乗員側壁部の前記受止予定部との離隔距離を規制可能に、前記車体側壁部の前記流入用開口の周縁と前記乗員側壁部の前記受止予定部とを連結するテザーが、配設されていることが望ましい。   Furthermore, in the airbag according to the present invention, the separation distance between the peripheral edge of the inflow opening of the vehicle body side wall portion and the planned receiving portion of the occupant side wall portion when the inflation is completed can be regulated. It is desirable that a tether for connecting the peripheral edge of the inflow opening and the scheduled receiving portion of the occupant side wall is provided.

このような構成では、膨張を完了させたエアバッグは、展開高さを確保した状態で、テザーにより、受止予定部の流入用開口の周縁からの離隔距離が規制されることから、車体側壁部における拡径部を設けたことによる膜長（周壁）の余裕のある部位を、エアバッグの収納部位の周縁に対して、張り付かせるような状態を確保できて、収納部位の周縁による支持を安定させて、乗員を受け止めることができる。また、乗員側壁部の中央付近に配置される受止予定部が、テザーにより、流入用開口の周縁からの離隔距離を一定として配設されて、一層、平面状に配設されることが可能となって、乗員を広い面積の平面状部位の受止予定部により、受け止めることができる。   In such a configuration, since the airbag that has been inflated has a deployment height secured, the distance from the peripheral edge of the inflow opening of the planned receiving portion is regulated by the tether. The area where the film length (peripheral wall) due to the provision of the enlarged diameter part is secured to the periphery of the airbag storage part can be secured and supported by the periphery of the storage part It is possible to stabilize the passenger and catch the occupant. In addition, the scheduled receiving portion disposed near the center of the passenger side wall portion can be further arranged in a planar shape with a constant separation distance from the periphery of the inflow opening by the tether. Thus, the occupant can be received by the receiving portion of the flat portion having a large area.

本発明の第１実施形態の運転席用のエアバッグが使用される運転席用エアバッグ装置の使用状態を示す概略平面図である。It is a schematic plan view which shows the use condition of the airbag apparatus for driver's seats where the airbag for driver's seats of 1st Embodiment of this invention is used. 第１実施形態の運転席用エアバッグ装置の概略縦断面図であり、図１のII−II部位に対応する。It is a schematic longitudinal cross-sectional view of the airbag apparatus for driver's seats of 1st Embodiment, and respond | corresponds to the II-II site | part of FIG. 第１実施形態の運転席用エアバッグを単体で膨張させた状態の乗員側壁部（運転者側壁部）の側から見た概略斜視図である。It is the schematic perspective view seen from the crew member side wall part (driver side wall part) of the state where the airbag for driver's seat of a 1st embodiment was inflated alone. 第１実施形態の運転席用エアバッグを単体で膨張させた状態の車体側壁部の側から見た概略斜視図である。It is the schematic perspective view seen from the side of the body side wall part of the state where the airbag for driver's seats of a 1st embodiment was inflated alone. 第１実施形態の運転席用エアバッグを単体で膨張させた状態の概略縦断面図である。It is a schematic longitudinal cross-sectional view of the state in which the driver's seat airbag of the first embodiment is inflated alone. 第１実施形態の運転席用エアバッグを構成する部材の平面図である。It is a top view of the member which constitutes the driver's seat air bag of a 1st embodiment. 第１実施形態の車体側壁部を形成するための車体側壁部用基布に、切欠き塞ぎ用結合部を形成する状態を説明する図である。It is a figure explaining the state which forms the coupling part for notch closure in the base fabric for vehicle body side wall parts for forming the vehicle body side wall part of 1st Embodiment. 第１実施形態の運転席用エアバッグ装置の作動時を示す前後方向に沿った概略縦断面図である。It is a schematic longitudinal cross-sectional view along the front-back direction which shows the time of the action | operation of the airbag apparatus for driver's seats of 1st Embodiment. 第１実施形態の運転席用エアバッグ装置の作動時を示す左右方向に沿った概略縦断面図である。It is a schematic longitudinal cross-sectional view along the left-right direction which shows the time of the action | operation of the airbag apparatus for driver's seats of 1st Embodiment. 第２実施形態の運転席用エアバッグを構成する部材の平面図である。It is a top view of the member which comprises the airbag for driver's seats of 2nd Embodiment. 第２実施形態の車体側壁部を形成するための車体側壁部用基布に、切欠き塞ぎ用結合部を形成する状態を説明する図である。It is a figure explaining the state which forms the coupling part for notch closing in the base fabric for vehicle body side wall parts for forming the vehicle body side wall part of 2nd Embodiment. 第２実施形態の運転席用エアバッグの膨張状態の概略斜視図である。It is a schematic perspective view of the inflated state of the driver's seat airbag of the second embodiment. 第２実施形態の運転席用エアバッグ装置の作動時を示す前後方向に沿った概略縦断面図である。It is a schematic longitudinal cross-sectional view along the front-back direction which shows the time of the action | operation of the airbag apparatus for driver's seats of 2nd Embodiment. 第３実施形態の助手席用のエアバッグの使用状態を示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows the use condition of the airbag for passenger seats of 3rd Embodiment. 第４実施形態のエアバッグを構成する部材の平面図である。It is a top view of the member which constitutes the airbag of a 4th embodiment. 第４実施形態のエアバッグを単体で膨張させた状態の概略縦断面図である。It is a schematic longitudinal cross-sectional view of the state which inflated the airbag of 4th Embodiment alone. 第４実施形態の運転席用エアバッグ装置の作動時を示す前後方向に沿った概略縦断面図である。It is a schematic longitudinal cross-sectional view along the front-back direction which shows the time of the action | operation of the airbag apparatus for driver's seats of 4th Embodiment. 第５実施形態のエアバッグの車体側壁部を製造する車体側壁部用基布の平面図である。It is a top view of the base fabric for vehicle body side wall parts which manufactures the vehicle body side wall part of the airbag of 5th Embodiment. 第５実施形態のエアバッグを構成する部材の平面図である。It is a top view of the member which comprises the airbag of 5th Embodiment. 第５実施形態のエアバッグを単体で膨張させた状態の概略縦断面図である。It is a schematic longitudinal cross-sectional view of the state which inflated the airbag of 5th Embodiment alone. 第５実施形態の運転席用エアバッグ装置の作動時を示す前後方向に沿った概略縦断面図である。It is a schematic longitudinal cross-sectional view along the front-back direction which shows the time of the action | operation of the airbag apparatus for driver's seats of 5th Embodiment. 第６実施形態のエアバッグの車体側壁部を製造する状態を説明する概略図である。It is the schematic explaining the state which manufactures the vehicle body side wall part of the airbag of 6th Embodiment. 第６実施形態のエアバッグを単体で膨張させた状態の概略縦断面図である。It is a schematic longitudinal cross-sectional view of the state which inflated the airbag of 6th Embodiment alone. 第６実施形態の運転席用エアバッグ装置の作動時を示す前後方向に沿った概略縦断面図である。It is a schematic longitudinal cross-sectional view along the front-back direction which shows the time of the action | operation of the airbag apparatus for driver's seats of 6th Embodiment.

以下、本発明の一実施形態を図面に基づいて説明すると、第１実施形態のエアバッグは、図１，２に示すように、運転席用のエアバッグ２０であり、この運転席用エアバッグ２０が使用されるエアバッグ装置Ｍ１は、ステアリングホイールＷに搭載される運転席用エアバッグ装置としている。ステアリングホイールＷは、ステアリングホイール本体１と、ステアリングホイール本体１の中央のボス部Ｂの上部に配置されるエアバッグ装置Ｍ１と、を備えて構成される。ステアリングホイール本体１は、操舵時に乗員としての運転者が把持する円環状のリング部Ｒと、リング部Ｒの中央に配置されてステアリングシャフトＳＳに締結されるボス部Ｂと、ボス部Ｂとリング部Ｒとを連結する４本のスポーク部Ｓと、を備えて構成される。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the airbag according to the first embodiment is an airbag 20 for a driver's seat. The airbag device M1 in which 20 is used is a driver seat airbag device mounted on the steering wheel W. The steering wheel W includes a steering wheel main body 1 and an airbag device M1 disposed on an upper portion of a central boss portion B of the steering wheel main body 1. The steering wheel body 1 includes an annular ring portion R that is gripped by a driver as an occupant during steering, a boss portion B that is disposed in the center of the ring portion R and fastened to the steering shaft SS, and the boss portion B and the ring. And four spoke portions S connecting the portion R.

なお、第１実施形態の説明では、特に断らない限り、上下方向は、ステアリングシャフトＳＳの軸方向に沿った上下方向が対応し、前後方向は、車両の直進操舵時のステアリングシャフトＳＳの軸方向と直交した前後方向が対応し、左右方向は、車両の直進操舵時のステアリングシャフトＳＳの軸方向と直交した左右方向が対応するものである。   In the description of the first embodiment, unless otherwise specified, the vertical direction corresponds to the vertical direction along the axial direction of the steering shaft SS, and the front-rear direction is the axial direction of the steering shaft SS during straight-ahead steering of the vehicle. The left-right direction corresponds to the left-right direction orthogonal to the axial direction of the steering shaft SS during straight-ahead steering of the vehicle.

また、図例のステアリングホイールＷは、リング部Ｒの外形寸法を、従来のものより２割程度、小径としている。   In the illustrated steering wheel W, the outer dimension of the ring portion R is about 20% smaller than that of the conventional one.

ステアリングホイール本体１は、図１，２に示すように、リング部Ｒ、ボス部Ｂ、スポーク部Ｓの各部を連結するように配置されて、アルミニウム合金等の金属製の芯金２を備えて構成される。芯金２のリング部Ｒの部位と各スポーク部Ｓのリング部Ｒ側の部位とには、合成樹脂製の被覆層４が被覆されている。芯金２のボス部Ｂの部位には、ステアリングシャフトＳＳを挿入させてナットＮ止めするための鋼製のボス３が配設されている。また、ステアリングホイール本体１の下部には、ボス部Ｂの下方を覆う合成樹脂製のロアカバー５が配設されている。   As shown in FIGS. 1 and 2, the steering wheel main body 1 is disposed so as to connect the ring portion R, the boss portion B, and the spoke portion S, and includes a metal core 2 such as an aluminum alloy. Composed. A portion of the ring portion R of the core metal 2 and a portion of each spoke portion S on the ring portion R side are covered with a synthetic resin coating layer 4. A steel boss 3 for inserting the steering shaft SS and fixing the nut N is disposed at the boss portion B of the core metal 2. Further, a lower cover 5 made of synthetic resin is provided below the steering wheel main body 1 so as to cover the lower portion of the boss portion B.

運転席用エアバッグ装置Ｍ１は、図２に示すように、折り畳まれて収納されるエアバッグ２０、エアバッグ２０に膨張用ガスを供給するインフレーター９、折り畳んだエアバッグ２０の上方を覆うエアバッグカバー１５、エアバッグ２０とインフレーター９とを収納保持するとともにエアバッグカバー１５を保持するケース１１、及び、インフレーター９とともにエアバッグ２０をケース１１に取り付けるためのリテーナ７、を備えて構成される。   As shown in FIG. 2, the driver-seat airbag apparatus M <b> 1 includes an airbag 20 that is folded and stored, an inflator 9 that supplies inflation gas to the airbag 20, and an airbag that covers the folded airbag 20. The cover 15, the airbag 20 and the inflator 9 are stored and held, and the case 11 that holds the airbag cover 15, and the retainer 7 that attaches the airbag 20 to the case 11 together with the inflator 9 are configured.

リテーナ７は、図１，２に示すように、四角環状の板金製として、エアバッグ２０の流入用開口２４の周縁を押えて、エアバッグ２０をケース１１に取り付けるとともに、インフレーター９をケース１１に取り付けるように、四隅に、ケース１１にナット止めされるボルト７ａを備えて構成されている。   As shown in FIGS. 1 and 2, the retainer 7 is made of a square annular sheet metal, presses the periphery of the inflow opening 24 of the airbag 20, attaches the airbag 20 to the case 11, and attaches the inflator 9 to the case 11. As shown in the figure, bolts 7 a that are nut-fastened to the case 11 are provided at the four corners.

インフレーター９は、上部に複数のガス吐出口９ｂを備えた円柱状の本体部９ａと、本体部９ａの外周面から突出するフランジ部９ｃと、を備えて構成される。フランジ部９ｃには、リテーナ７の各ボルト７ａを貫通させる貫通孔９ｄが形成されている。   The inflator 9 includes a cylindrical main body portion 9a having a plurality of gas discharge ports 9b in the upper portion, and a flange portion 9c protruding from the outer peripheral surface of the main body portion 9a. The flange portion 9c is formed with a through hole 9d through which each bolt 7a of the retainer 7 passes.

ケース１１は、図１，２に示すように、略直方体形状の板金製とし、ステアリングホイールＷのボス部Ｂの上部に配置されて、折り畳まれたエアバッグ２０を収納する収納部位を構成し、長方形状の底壁部１１ａには、インフレーター９の本体部９ａを下方から挿入可能な円形に開口した挿通孔１１ｂが形成されるとともに、その周囲に、リテーナ７のボルト７ａを貫通させる４つの貫通孔１１ｃ（図１参照）が形成されている。底壁部１１ａの外周縁から上方に延びる側壁部１１ｄの上端には、外方へ延びる取付片１１ｅが形成され、取付片１１ｅには、ホーンスイッチ機構１３の取付基板１３ａが取り付けられ（図９参照）、取付基板１３ａを利用して、ケース１１がステアリングホイールＷの芯金２に取付固定され、エアバッグ装置Ｍ１が、ステアリングシャフトＳＳに装着済みのステアリングホイール本体１のボス部Ｂの上部に搭載されることとなる。また、ケース１１の側壁部１１ｄには、リベット１４等を利用してエアバッグカバー１５の側壁部１７が取り付けられている。   As shown in FIGS. 1 and 2, the case 11 is made of a substantially rectangular parallelepiped sheet metal, and is disposed on the upper portion of the boss portion B of the steering wheel W to constitute a storage portion for storing the folded airbag 20. The rectangular bottom wall portion 11a is formed with an insertion hole 11b having a circular opening through which the main body portion 9a of the inflator 9 can be inserted from below, and four penetrations through which the bolts 7a of the retainer 7 pass. A hole 11c (see FIG. 1) is formed. An outwardly extending attachment piece 11e is formed at the upper end of the side wall 11d extending upward from the outer peripheral edge of the bottom wall 11a, and the attachment board 13a of the horn switch mechanism 13 is attached to the attachment piece 11e (FIG. 9). The case 11 is attached and fixed to the mandrel 2 of the steering wheel W using the mounting substrate 13a, and the airbag device M1 is mounted on the upper portion of the boss portion B of the steering wheel body 1 that is already attached to the steering shaft SS. Will be installed. A side wall 17 of the airbag cover 15 is attached to the side wall 11d of the case 11 using a rivet 14 or the like.

エアバッグカバー１５は、図１，２に示すように、合成樹脂製として、収納したエアバッグ２０の上方を覆う天井壁部１６と、天井壁部１６の外周縁付近から下方へ延びる略四角筒形状の側壁部１７と、を備えて構成されている。天井壁部１６には、膨張するエアバッグ２０に押されて前後両側に開く２枚の扉部１６ａ，１６ａが形成されている。   As shown in FIGS. 1 and 2, the airbag cover 15 is made of synthetic resin and is made of a synthetic resin. And a side wall portion 17 having a shape. The ceiling wall portion 16 is formed with two door portions 16a and 16a that are pushed by the inflating airbag 20 and open to both the front and rear sides.

エアバッグ２０は、ポリアミドやポリエステル等の織糸を織った布材から形成され、図１〜５に示すように、膨張完了形状を、上方から見て略円形（詳しくは、丸みを帯びた略正方形）とした略円柱状（詳しくは、側辺を曲面とした略四角柱状）とするように、構成されて、図３〜５，８，９に示すように、外周壁２１が、車体側としてのステアリングホイール本体１側（リング部Ｒ側）の車体側壁部２２と、乗員としての運転者ＭＤ（図８参照）の側の乗員側壁部（運転者側壁部）３２と、を備えて構成されている。   The airbag 20 is formed from a cloth material woven with a woven yarn such as polyamide or polyester, and as shown in FIGS. 1 to 5, the inflation completion shape is substantially circular when viewed from above (specifically, a rounded outline) 3, 8, and 9, and the outer peripheral wall 21 is formed on the vehicle body side as shown in FIGS. 3, 5, 8, and 9. The vehicle body side wall 22 on the steering wheel main body 1 side (ring portion R side) as an occupant side wall portion (driver side wall portion) 32 on the driver MD (see FIG. 8) side as an occupant. Has been.

乗員側壁部としての運転者側壁部３２は、図６に示す円板状の乗員側壁部用基布６２から形成され、中央３２ａ付近を運転者ＭＤを受け止める受止予定部３４としている。   The driver side wall portion 32 as the occupant side wall portion is formed from a disc-shaped occupant side wall portion base fabric 62 shown in FIG. 6, and the vicinity of the center 32a is a scheduled receiving portion 34 that receives the driver MD.

車体側壁部２２は、図６，７に示すように、車体側壁部用基布４２から略円板状に形成されており、車体側壁部２２の中央には、膨張用ガスを流入させるように円形に開口する流入用開口２４が配設されている。流入用開口２４の周縁には、エアバッグ２０をケース１１の底壁部１１ａに取り付けるためのリテーナ７の各ボルト７ａを貫通させる取付孔２５ａが、形成されている。流入用開口２４の周縁の取付孔２５ａの配設部位は、リテーナ７に押えられてケース１１の底壁部１１ａに取り付けられる取付部２５を構成することとなる。車体側壁部２２は、エアバッグ２０の膨張完了時、収納部位としてのケース１１の周縁、すなわち、第１実施形態の場合、車体側部材としてのステアリングホイールＷのリング部Ｒやスポーク部Ｓの上面ＰＲに支持されることなる。   As shown in FIGS. 6 and 7, the vehicle body side wall portion 22 is formed in a substantially disc shape from the vehicle body side wall portion base fabric 42, so that the inflation gas flows into the center of the vehicle body side wall portion 22. An inflow opening 24 having a circular opening is provided. At the periphery of the inflow opening 24, an attachment hole 25 a is formed through which each bolt 7 a of the retainer 7 for attaching the airbag 20 to the bottom wall portion 11 a of the case 11 is passed. An arrangement site of the attachment hole 25 a at the periphery of the inflow opening 24 constitutes an attachment portion 25 that is held by the retainer 7 and attached to the bottom wall portion 11 a of the case 11. When the airbag 20 is completely inflated, the vehicle body side wall portion 22 is a peripheral edge of the case 11 as a storage portion, that is, in the case of the first embodiment, the upper surface of the ring portion R or the spoke portion S of the steering wheel W as a vehicle body side member. It will be supported by PR.

そして、エアバッグ２０の外周壁２１は、車体側壁部２２と運転者側壁部３２との外周縁２３，３２ｂ相互を、縫合して形成されている。   The outer peripheral wall 21 of the airbag 20 is formed by stitching the outer peripheral edges 23 and 32b of the vehicle body side wall 22 and the driver side wall 32 together.

さらに、膨張完了時の車体側壁部２２は、流入用開口２４の周囲の前後左右の４箇所に、小さく略円錐形状に突出する突条部２７（張出部２９）が配設されている。   Further, the vehicle body side wall portion 22 at the time of completion of expansion is provided with protrusions 27 (projecting portions 29) that protrude in a small and substantially conical shape at four locations around the inflow opening 24.

各突条部２７は、図６，７に示す車体側壁部用基布４２の外周縁４３の前後左右の４箇所の位置に配設されたＶ字状の切欠き４６を、塞ぐように結合させたことにより形成されている。すなわち、切欠き４６の底部（先端）４６ａから対向するように延びる両縁（対向縁）４６ｂ，４６ｂ相互を、縫合糸９０を使用した縫製により結合させて、切欠き塞ぎ用結合部２６を形成することにより、エアバッグ２０の膨張完了時に、切欠き４６の底部４６ａ付近を頂部２８とするような略円錐状の突条部２７が形成されることとなる。   Each protrusion 27 is connected so as to block V-shaped notches 46 disposed at four positions on the front, rear, left and right of the outer peripheral edge 43 of the vehicle body side wall base fabric 42 shown in FIGS. It is formed by letting. That is, both edges (opposing edges) 46b and 46b extending so as to face each other from the bottom (tip) 46a of the notch 46 are joined together by sewing using the suture thread 90 to form the notch closing joint 26. Thus, when the airbag 20 is completely inflated, the substantially conical ridge 27 is formed so that the vicinity of the bottom 46 a of the notch 46 is the top 28.

換言すれば、車体側壁部用基布４２は、流入用開口２４から、切欠き４６の設けられていない部位における外周縁４５まで、の寸法（半径寸法）ｒ１が、流入用開口２４から外周縁４５までの対応する同じ方向とした乗員側壁部用基布６１の中央３２ａから外周縁６３までの寸法（半径寸法）ｒ０より、大きく設定されて、切欠き４６間の部位が、対応する乗員側壁部用基布６１より、寸法を大きくした拡径部４４としている。但し、各拡径部４４の外周縁４５は、乗員側壁部用基布６１の外周縁６３を均等に４分割した分割外周縁６４と、同じ形状としている。   In other words, the vehicle body side wall base fabric 42 has a dimension (radial dimension) r1 from the inflow opening 24 to the outer peripheral edge 45 in the portion where the notch 46 is not provided. 45 is set to be larger than the dimension (radial dimension) r0 from the center 32a of the occupant side wall base fabric 61 to the outer peripheral edge 63 in the same direction up to 45, and the portion between the notches 46 corresponds to the corresponding occupant side wall. The diameter-enlarged portion 44 is larger than the portion base fabric 61. However, the outer peripheral edge 45 of each enlarged diameter portion 44 has the same shape as the divided outer peripheral edge 64 obtained by equally dividing the outer peripheral edge 63 of the occupant side wall base fabric 61 into four.

そのため、各切欠き４６を塞ぐように、車体側壁部用基布４２に切欠き塞ぎ用結合部２６を形成すれば、各拡径部４４の外周縁４５が連なり、乗員側壁部用基布６２の外周縁６３（運転者側壁部３２の外周縁３２ｂと一致する）と同じ寸法の円環状となって、車体側壁部２２の外周縁２３が形成されている。   Therefore, if the notch-closing coupling portion 26 is formed in the vehicle body side wall base fabric 42 so as to close each notch 46, the outer peripheral edge 45 of each enlarged diameter portion 44 is connected, and the occupant side wall portion base fabric 62. The outer peripheral edge 63 of the vehicle body side wall part 22 is formed in an annular shape having the same dimensions as the outer peripheral edge 63 (which coincides with the outer peripheral edge 32b of the driver side wall part 32).

その結果、エアバッグ２０の外周壁２１を形成する際には、外周縁２３，３２ｂは、相互に平らに重ねることができて、容易に、工業用ミシンを使用して、相互に縫合することができる。   As a result, when the outer peripheral wall 21 of the airbag 20 is formed, the outer peripheral edges 23 and 32b can be flattened with each other and easily sewn together using an industrial sewing machine. Can do.

なお、拡径部４４を設けていることにより、車体側壁部２２では、流入用開口２４から外周縁２３までの寸法ｒ１が、対応する部位の乗員側壁部３２の寸法ｒ０に対して、膜長差（ｒ１−ｒ０）を生じさせており、その膜長差を吸収するように、調整折り部５０を設けて、運転者側壁部３２に重なるように平らに展開させている。第１実施形態の場合、切欠き塞ぎ用結合部２６付近の折目（折重部）５１や取付部２５の周囲の弛み５２を設けて、調整折り部５０を構成している（図７参照）。そして、これらの調整折り部５０を設けて、拡径部４４を有した車体側壁部２２は、平らに展開させることができ、平らに展開させた運転者側壁部３２と重ねることができる。   In addition, by providing the enlarged diameter portion 44, in the vehicle body side wall portion 22, the dimension r1 from the inflow opening 24 to the outer peripheral edge 23 is larger than the dimension r0 of the occupant side wall portion 32 of the corresponding portion. A difference (r1−r0) is generated, and an adjustment folding part 50 is provided so as to absorb the film length difference, and is flatly developed so as to overlap the driver side wall part 32. In the case of the first embodiment, a fold (folded portion) 51 in the vicinity of the notch closing coupling portion 26 and a slack 52 around the attachment portion 25 are provided to constitute the adjustment folding portion 50 (see FIG. 7). ). Further, the vehicle body side wall portion 22 provided with these adjustment folding portions 50 and having the enlarged diameter portion 44 can be flattened and overlapped with the driver side wall portion 32 that has been flattened.

また、切欠き４６の底部４６ａの配置位置は、ステアリングホイールＷへの搭載状態でのエアバッグ２０の膨張完了時に底部４６ａに対応する各突条部２７の頂部２８がリング部Ｒの外方側に配置されるように、流入用開口２４に接近し過ぎず、流入用開口２４から所定の寸法ｒ２分、離れるように、設定されている。   Further, the position of the bottom 46a of the notch 46 is such that the top 28 of each ridge 27 corresponding to the bottom 46a is located on the outer side of the ring R when the airbag 20 is completely inflated when mounted on the steering wheel W. Is set so as not to be too close to the inflow opening 24 and to be separated from the inflow opening 24 by a predetermined dimension r2.

なお、上記の寸法ｒ０，ｒ１，ｒ２は、縫合する際の実質的な長さ寸法であり、図例の場合、所定の流入用開口２４や運転者側壁部（乗員側壁部）の中心から該当する縫合ラインまでの寸法を図示している。   The above dimensions r0, r1, and r2 are substantial length dimensions when sewing, and in the case of the illustrated example, they correspond from the center of the predetermined inflow opening 24 and the driver side wall (occupant side wall). The dimensions up to the stitching line are shown.

さらに、車体側壁部２２の取付部２５には、補強布７０，８２が縫合されるとともに、整流布３９が縫合されて、それらの補強布７０，８２や整流布３９にも、流入用開口２４と取付孔２５ａとが貫通されている。補強布７０，８２と整流布３９とは、流入用開口２４の中心と同心的に円環状に縫合した縫合部（図符号省略）により、車体側壁部２２に結合されている。   Further, the reinforcing cloths 70 and 82 are stitched to the attachment portion 25 of the vehicle body side wall part 22 and the rectifying cloth 39 is stitched, and the reinforcing cloths 70 and 82 and the rectifying cloth 39 are also opened. And the mounting hole 25a are penetrated. The reinforcing cloths 70 and 82 and the rectifying cloth 39 are coupled to the vehicle body side wall portion 22 by a stitched portion (not shown) concentrically stitched in an annular shape concentrically with the center of the inflow opening 24.

整流布３９は、エアバッグ２０内の流入用開口２４を覆って、前後両側に開口を設けた筒状として（図８参照）、インフレーター９からの膨張用ガスを前後両側に流すように、配設されている。この整流布３９は、図６に示すように、流入用開口２４の周縁の取付部２５に縫合される本体部７９と、本体部７９の左右両側から延びる二つの連結片部８０，８０と、を備えた整流布用基布７８から形成されて、本体部７９を取付部２５に縫合させ、連結片部８０，８０の先端８０ａ相互を縫合して、配設されている。   The rectifying cloth 39 covers the inflow opening 24 in the airbag 20 and has a cylindrical shape with openings on both the front and rear sides (see FIG. 8), and is arranged so that the inflation gas from the inflator 9 flows on both the front and rear sides. It is installed. As shown in FIG. 6, the rectifying cloth 39 includes a main body 79 that is sewn to the attachment portion 25 at the periphery of the inflow opening 24, two connecting piece portions 80 and 80 that extend from the left and right sides of the main body 79, The body portion 79 is sewn to the mounting portion 25, and the tips 80a of the connecting piece portions 80 and 80 are sewn together.

また、エアバッグ１０には、運転者側壁部３２の受止予定部３４の所定の展開高さＨ１（図５参照）を確保した状態として、受止予定部３４における流入用開口２４からの離隔距離ＳＬ（図５参照）を規定するように、流入用開口２４の周縁と受止予定部３４とを連結するテザー３７，３７が、流入用開口２４の左右両側に配設されている（図９参照）。第１実施形態の場合、テザー３７，３７は、流入用開口２４の周縁の取付部２５に縫合される脚部付き補強布７０と、受止予定部３４に縫合される脚部付き天井パネル７４と、から形成されている。脚部付き補強布７０は、取付部２５に縫合される本体部７１と、本体部７１の左右両側から延びる脚部７２，７２と、を備えて構成され、脚部付き天井パネル７４は、受止予定部３４に縫合される本体部７５と、本体部７５の左右両側から延びる脚部７６，７６と、を備えて構成されている。そして、テザー３７，３７は、脚部７２，７６相互を縫合して形成されている。すなわち、各テザー３７の上部３７ａ側が、受止予定部３４に縫合された脚部付き天井パネル７４の本体部７５から延びる脚部７６から形成され、各テザー３７の下部３７ｂ側が、取付部２５に縫合された脚部付き補強布７０の本体部７１から延びた脚部７２から形成されている。   Further, the airbag 10 is separated from the inflow opening 24 in the scheduled receiving portion 34 in a state where a predetermined deployment height H1 (see FIG. 5) of the scheduled receiving portion 34 of the driver side wall portion 32 is secured. To define the distance SL (see FIG. 5), tethers 37, 37 that connect the peripheral edge of the inflow opening 24 and the scheduled receiving portion 34 are disposed on the left and right sides of the inflow opening 24 (see FIG. 5). 9). In the case of the first embodiment, the tethers 37, 37 are legged reinforcing cloths 70 that are sewn to the attachment part 25 at the periphery of the inflow opening 24, and legged ceiling panels 74 that are sewn to the receiving scheduled part 34. And is formed from. The legged reinforcing cloth 70 includes a main body portion 71 sewn to the attachment portion 25 and leg portions 72 and 72 extending from the left and right sides of the main body portion 71. The main body portion 75 is sewn to the planned stop portion 34, and leg portions 76, 76 extending from the left and right sides of the main body portion 75 are configured. The tethers 37 and 37 are formed by stitching the leg portions 72 and 76 together. That is, the upper portion 37 a side of each tether 37 is formed from a leg portion 76 extending from the main body portion 75 of the ceiling panel 74 with legs stitched to the receiving scheduled portion 34, and the lower portion 37 b side of each tether 37 is connected to the attachment portion 25. It is formed from the leg part 72 extended from the main-body part 71 of the stitched reinforcement cloth 70 with a leg part.

このエアバッグ２０の製造は、まず、運転者側壁部３２と車体側壁部２２とをそれぞれ製造する。運転者側壁部３２の製造では、乗員側壁部用基布６２の受止予定部３４の部位に、脚部付き天井パネル７４の本体部７５と、補強布８３と、を重ねて縫合すれば、製造することができる。   In manufacturing the airbag 20, first, the driver side wall portion 32 and the vehicle body side wall portion 22 are respectively manufactured. In the manufacture of the driver side wall part 32, if the body part 75 of the ceiling panel 74 with legs and the reinforcing cloth 83 are overlapped and sewn to the site of the planned receiving part 34 of the base fabric 62 for the passenger side wall part, Can be manufactured.

車体側壁部２２の製造では、まず、流入用開口２４や取付孔２５ａを設けない状態として、車体側壁部用基布４２の取付部２５の部位に、脚部付き補強布７０の本体部７１、整流布用基布７８の本体部７９、及び、補強布８２、を重ね、そして、縫合した後、孔開け加工により、流入用開口２４と取付孔２５ａとを形成する。ついで、各切欠き４６の対向縁４６ｂ相互を縫合して、切欠き塞ぎ用結合部２６を形成すれば、車体側壁部２２を製造することができる。   In the manufacture of the vehicle body side wall portion 22, first, the main body portion 71 of the reinforcing fabric 70 with legs is formed in the attachment portion 25 portion of the vehicle body side wall portion base fabric 42 in a state where the inflow opening 24 and the attachment hole 25 a are not provided. After the main body 79 and the reinforcing cloth 82 of the rectifying cloth base cloth 78 are overlapped and stitched, the inflow opening 24 and the attachment hole 25a are formed by drilling. Next, if the opposing edges 46b of the notches 46 are stitched together to form the notch closing coupling portion 26, the vehicle body side wall portion 22 can be manufactured.

その後、平らに展開させた車体側壁部２２と運転者側壁部３２との外表面側となる面相互を合わせつつ、外周縁２３，３２ｂ相互を重ねて、工業用ミシンの作業台に載せて、外周縁２３，３２ｂ相互を縫合し、流入用開口２４を利用して、裏返せば、エアバッグ２０の外周壁２１を製造することができる。ついで、流入用開口２４から、脚部７２，７６や連結片部８０を引き出し、対応する脚部７２，７６相互と連結片部８０，８０の先端８０ａ相互を縫合して、それらの縫合部位をエアバッグ２０内に戻せば、テザー３７や整流布３９を設けたエアバッグ２０を製造することができる。   Thereafter, the outer peripheral edges 23 and 32b are overlapped with each other while the surfaces of the vehicle body side wall portion 22 and the driver side wall portion 32 that are spread flat are aligned with each other, and placed on the work table of an industrial sewing machine. The outer peripheral wall 21 of the airbag 20 can be manufactured if the outer peripheral edges 23 and 32b are stitched together and turned over using the inflow opening 24. Next, the leg portions 72 and 76 and the connecting piece portion 80 are pulled out from the inflow opening 24, and the corresponding leg portions 72 and 76 and the distal ends 80 a of the connecting piece portions 80 and 80 are sewn together, and these stitched portions are connected. If it returns in the airbag 20, the airbag 20 which provided the tether 37 and the baffle cloth 39 can be manufactured.

そして、エアバッグ装置Ｍ１を組み立てて車両に搭載する場合には、リテーナ７の各ボルト７ａを取付孔２５ａから突出させるようにエアバッグ２０内にリテーナ７を入れ、ついで、エアバッグ２０を折り畳んで、折り崩れしないように、エアバッグ２０を所定の折り崩れ防止材によって包む。ついで、リテーナ７の各ボルト７ａを貫通孔１１ｃから突出させるように、ケース１１内の底壁部１１ａ上にエアバッグ２０を収納して、さらに、インフレーター９の本体部９ａを下方から底壁部１１ａの挿通孔１１ｂに挿入させ、フランジ部９ｃの貫通孔９ｄにリテーナ７の各ボルト７ａを貫通させて、各ボルト７ａに図示しないナットを締結すれば、収納部位としてのケース１１に、エアバッグ２０とインフレーター９とを収納し、かつ、リテーナ７を利用して、エアバッグ２０とインフレーター９とを取り付けることができる。さらに、ケース１１にエアバッグカバー１５を被せて、リベット１４等を利用して側壁部１１ｄ，１７相互を連結して、ケース１１にエアバッグカバー１５を取り付け、さらに、ケース１１の取付片１１ｅに、ホーンスイッチ機構１３を組み付ければ、エアバッグ装置Ｍ１を組み立てることができる。そして、エアバッグ装置Ｍ１の車両への搭載は、予め、ステアリングシャフトＳＳに締結したステアリングホイール本体１に対して、ホーンスイッチ機構１３の取付基板１３ａを利用して、エアバッグ装置Ｍ１を取り付ければ、エアバッグ装置Ｍ１を車両に搭載することができる。   When the airbag device M1 is assembled and mounted on a vehicle, the retainer 7 is inserted into the airbag 20 so that each bolt 7a of the retainer 7 protrudes from the mounting hole 25a, and then the airbag 20 is folded. The airbag 20 is wrapped with a predetermined collapse preventing material so as not to collapse. Next, the airbag 20 is housed on the bottom wall portion 11a in the case 11 so that each bolt 7a of the retainer 7 protrudes from the through hole 11c, and the main body portion 9a of the inflator 9 is further moved from the bottom to the bottom wall portion. If the bolts 7a of the retainer 7 are inserted into the through holes 11b of the flange portion 9c and the nuts (not shown) are fastened to the bolts 7a, the airbag 11 is attached to the case 11 as a storage part. 20 and the inflator 9 can be accommodated, and the airbag 20 and the inflator 9 can be attached using the retainer 7. Further, the case 11 is covered with the airbag cover 15, the rivets 14 are used to connect the side wall portions 11 d and 17, the airbag cover 15 is attached to the case 11, and the attachment piece 11 e of the case 11 is further attached. If the horn switch mechanism 13 is assembled, the airbag apparatus M1 can be assembled. And the mounting of the airbag apparatus M1 on the vehicle is performed by attaching the airbag apparatus M1 to the steering wheel main body 1 fastened to the steering shaft SS in advance using the mounting board 13a of the horn switch mechanism 13. The airbag device M1 can be mounted on a vehicle.

車両への搭載後、第１実施形態の運転席用エアバッグ装置Ｍ１では、膨張用ガスＧが流入用開口２４を経てエアバッグ２０に流入するように作動すると、膨張用ガスＧにより、エアバッグ２０が膨張し、エアバッグカバー１５の扉部１６ａ，１６ａを押し開いて、エアバッグ２０が、図１，２の二点鎖線や図８，９の実線に示すように、収納部位としてのケース１１から突出して、リング部Ｒやスポーク部Ｓの上面ＰＲ側を覆い、それらの上面ＰＲ側に支持されるように、膨張を完了させる。   In the driver's seat airbag device M1 of the first embodiment after being mounted on the vehicle, when the inflation gas G is operated so as to flow into the airbag 20 via the inflow opening 24, the inflation gas G causes the airbag to When the airbag 20 is inflated and the doors 16a and 16a of the airbag cover 15 are pushed open, the airbag 20 is a case as a storage part as shown by a two-dot chain line in FIGS. 1 and 2 and a solid line in FIGS. 11, the expansion is completed so as to cover the upper surface PR side of the ring portion R and the spoke portion S and to be supported by the upper surface PR side.

そして、第１実施形態の運転席用のエアバッグ２０では、車体側壁部２２が、流入用開口２４の周囲で、運転者側壁部（乗員側壁部）３２の中央付近の受止予定部３４から外周縁３２ｂまでの寸法ｒ０より大きくした寸法ｒ１の拡径部４４を備えており、運転者側壁部３２より寸法ｒ１を大きくする拡径部４４の膜長（周壁）の余裕分（ｒ１−ｒ０の寸法差分）、運転者側壁部３２の展開高さＨ１を大きく確保できる。また、運転者側壁部３２は、単に、外周縁３２ｂを、収縮部位４８（切欠き塞ぎ用結合部２６）を設けた車体側壁部２２の外周縁２３に結合させているだけであって、膨張完了時の中央付近の受止予定部３４を、極力、平坦状に維持でき、受け止める運転者（乗員）ＭＤを広い平面状の受止予定部３４により受け止めることができる。   In the airbag 20 for the driver's seat according to the first embodiment, the vehicle body side wall portion 22 is located around the inflow opening 24 from the scheduled receiving portion 34 near the center of the driver side wall portion (passenger side wall portion) 32. A diameter-enlarged portion 44 having a dimension r1 larger than the dimension r0 up to the outer peripheral edge 32b is provided. ), The unfolded height H1 of the driver side wall 32 can be secured large. Further, the driver side wall portion 32 is simply connected to the outer peripheral edge 23 of the vehicle body side wall portion 22 provided with the contracted portion 48 (notch closing connecting portion 26), and is expanded. The planned receiving portion 34 near the center at the time of completion can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide flat receiving planned portion 34.

したがって、第１実施形態のエアバッグ２０では、膨張完了時の展開高さＨ１を確保できるとともに、広い平面状部位により運転者ＭＤを受け止めることができる。   Therefore, in the airbag 20 of the first embodiment, the deployment height H1 at the completion of the inflation can be secured, and the driver MD can be received by a wide planar portion.

また、第１実施形態のエアバッグ２０では、収縮部位４８（切欠き塞ぎ用結合部２６）が、運転者側壁部（乗員側壁部）３２の外周縁３２ｂと車体側壁部２２の外周縁２３とを平らに重ねて結合可能とするように、配設されている。すなわち、第１実施形態では、車体側壁部２２の外周縁２３は、４つの拡径部４４の外周縁４５が連なって形成され、各拡径部４４の外周縁４５は、運転者側壁部３２の外周縁３２ｂ（６３）を均等に４分割した分割外周縁６４と同じ形状としており、そのため、４つの拡径部４４の外周縁４５が連なって形成される車体側壁部２２の外周縁２３は、運転者側壁部３２の外周縁３２ｂ（６３）と同じ形状となることから、相互に平らに重ねて結合することができる。   Further, in the airbag 20 of the first embodiment, the contracted portion 48 (the notch closing coupling portion 26) includes the outer peripheral edge 32b of the driver side wall portion (occupant side wall portion) 32 and the outer peripheral edge 23 of the vehicle body side wall portion 22. Are arranged so that they can be joined together in a flat manner. That is, in the first embodiment, the outer peripheral edge 23 of the vehicle body side wall portion 22 is formed by connecting the outer peripheral edges 45 of the four enlarged diameter portions 44, and the outer peripheral edge 45 of each enlarged diameter portion 44 is the driver side wall portion 32. The outer peripheral edge 32b of the vehicle body side wall portion 22 formed by connecting the outer peripheral edges 45 of the four enlarged diameter portions 44 is formed in the same shape as the divided outer peripheral edge 64 obtained by equally dividing the outer peripheral edge 32b (63) into four parts. Since it has the same shape as the outer peripheral edge 32b (63) of the driver side wall portion 32, the driver side wall portion 32 can be overlapped and joined together.

そのため、第１実施形態では、エアバッグ２０の外周壁２１を構成するように、運転者側壁部３２と車体側壁部２２との外周縁３２ｂ，２３相互を結合させる際、外周縁３２ｂ，２３相互を平らに重ねて、工業用ミシンを利用した平面縫製により、簡便に結合できることから、運転者側壁部３２と車体側壁部２２との外周縁３２ｂ，２３相互の結合作業が容易となって、エアバッグ２０の外周壁２１の製造を効率的に行うことができる。   Therefore, in the first embodiment, when the outer peripheral edges 32b and 23 of the driver side wall 32 and the vehicle body side wall 22 are coupled to each other so as to constitute the outer peripheral wall 21 of the airbag 20, the outer peripheral edges 32b and 23 are mutually connected. Can be easily combined by plane sewing using an industrial sewing machine, so that the outer peripheral edges 32b and 23 of the driver side wall portion 32 and the vehicle body side wall portion 22 can be easily connected to each other. The outer peripheral wall 21 of the bag 20 can be manufactured efficiently.

特に、第１実施形態では、収縮部位４８が、運転者側壁部３２との結合前における平らに展開した車体側壁部用基布４２の外周縁４３に設けられた略Ｖ字状の切欠き４６における対向する両縁４６ｂ，４６ｂを、相互に結合させてなる切欠き塞ぎ用結合部２６、として構成されている。   In particular, in the first embodiment, the contracted portion 48 is a substantially V-shaped notch 46 provided on the outer peripheral edge 43 of the vehicle body side wall base fabric 42 that is flatly developed before the connection with the driver side wall portion 32. The opposite edges 46b, 46b in FIG. 3 are configured as a notch-closing coupling portion 26 that is coupled to each other.

このような構成では、車体側壁部２２が、切欠き塞ぎ用結合部２６を設けた切欠き４６の底部（先端）４６ａ付近の膨張完了形状を、切欠き４６の底部４６ａを頂部２８とした略円錐状の突条部２７を設けるようにして、膨張する（図４，５，８，９参照）。そのため、エアバッグ２０の膨張完了時における車体側壁部２２における切欠き塞ぎ用結合部２６付近では、運転者側壁部（乗員側壁部）３２の外周縁３２ｂから流入用開口２４側に延びる形状として、単に、流入用開口２４側に曲面状に窄まるのではなく、運転者側壁部３２の外周縁３２ｂから流入用開口２４の中心軸Ｃ１（図５参照）に沿うように（ステアリングシャフトＳＳの軸方向、すなわち、上下方向に沿うように）、切欠き塞ぎ用結合部２６に沿って下方側に延び、略円錐状の突条部２７の頂部２８（切欠き４６の底部４６ａ）付近で曲がって、運転者側壁部３２の受止予定部３４に沿うような面３０として、流入用開口２４側に延びる形状となる。すなわち、車体側壁部２２の外周縁２３付近の切欠き塞ぎ用結合部２６が、流入用開口２４の中心軸Ｃ１に沿うように、下方側に延びる厚肉の張出部２９を形成して、容積を増大させ、エアバッグ２０を収納していた収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）に対して、張出部２９の流入用開口２４側の面３０を、張り付かせるように、接触させ易くなる（図８，９参照）。そのため、エアバッグ２０が膨張を完了させれば、切欠き塞ぎ用結合部２６によって形成される張出部２９の流入用開口２４側の面３０を、収納部位１１側の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）に支持させ易くなり、エアバッグ２０の運転者受止時における反力を迅速に確保可能となる。その結果、このような構成のエアバッグ２０では、膨張完了時、拡径部４４を設けたことによる高い展開高さＨ１を確保できるとともに、張出部２９の流入用開口２４側の面３０が、収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）から安定した支持を確保できて、運転者（乗員）ＭＤを迅速かつ安定して受け止めることが可能となる。   In such a configuration, the vehicle body side wall 22 has an expansion completed shape in the vicinity of the bottom (tip) 46 a of the notch 46 provided with the notch closing coupling portion 26, and the bottom 46 a of the notch 46 is substantially the top 28. The conical ridges 27 are provided to expand (see FIGS. 4, 5, 8, and 9). Therefore, in the vicinity of the notch closing coupling portion 26 in the vehicle body side wall portion 22 when the airbag 20 is completely inflated, the shape extends from the outer peripheral edge 32b of the driver side wall portion (passenger side wall portion) 32 to the inflow opening 24 side. Rather than simply constricting into the curved shape on the inflow opening 24 side, along the central axis C1 (see FIG. 5) of the inflow opening 24 from the outer peripheral edge 32b of the driver side wall 32 (the axis of the steering shaft SS). Direction (ie, along the vertical direction), and extends downward along the notch closing coupling portion 26 and bends near the top portion 28 of the substantially conical ridge portion 27 (the bottom portion 46a of the notch 46). As a surface 30 along the scheduled receiving portion 34 of the driver side wall portion 32, the surface 30 extends toward the inflow opening 24. In other words, the notch closing coupling portion 26 near the outer peripheral edge 23 of the vehicle body side wall portion 22 forms a thick overhanging portion 29 extending downward along the central axis C1 of the inflow opening 24, The surface 30 on the inflow opening 24 side of the overhanging portion 29 is stretched against the periphery of the storage portion 11 (the upper surface PR of the ring portion R and the spoke portion S) where the volume is increased and the airbag 20 is stored. It becomes easy to make it contact so that it may attach (refer FIG. 8, 9). For this reason, when the airbag 20 is completely inflated, the surface 30 on the inflow opening 24 side of the overhanging portion 29 formed by the notch closing coupling portion 26 is moved to the periphery (ring portion R or It becomes easy to support on the upper surface PR) of the spoke portion S, and it becomes possible to quickly secure a reaction force when the airbag 20 is received by the driver. As a result, in the airbag 20 having such a configuration, when the inflation is completed, a high deployment height H1 due to the provision of the enlarged diameter portion 44 can be secured, and the surface 30 on the inflow opening 24 side of the overhang portion 29 can be secured. Stable support can be secured from the periphery of the storage part 11 (the upper surface PR of the ring part R and the spoke part S), and the driver (occupant) MD can be received quickly and stably.

特に、第１実施形態のエアバッグ２０では、ステアリングホイールＷにおける乗員としての運転者ＭＤが把持するリング部Ｒの中央のボス部Ｂ（詳しくは、エアバッグ装置Ｍ１のケース１１）に、折り畳まれて収納され、膨張時の運転者側壁部（乗員側壁部）３２の受止予定部３４が、運転者ＤＭを受け止めるように配設されるような運転席用エアバッグとして、構成されている。そして、この運転席用エアバッグ２０では、収縮部位４８は、運転者側壁部（乗員側壁部）３２との結合前における平らに展開した車体側壁部用基布４２の外周縁４３に設けられた略Ｖ字状の切欠き４６における対向する両縁４６ｂ，４６ｂを、相互に結合させてなる切欠き塞ぎ用結合部２６、として構成されている。そして、エアバッグ２０の膨張完了時に、流入用開口２４から所定の寸法ｒ２を設けて配置されている切欠き４６の底部４６ａが、リング部Ｒの外方側に、配設される構成としている。   In particular, in the airbag 20 according to the first embodiment, the airbag 20 of the steering wheel W is folded on the center boss portion B of the ring portion R gripped by the driver MD as a passenger (specifically, the case 11 of the airbag device M1). The driver scheduled side portion 34 of the driver side wall portion (passenger side wall portion) 32 when inflated is configured as a driver's seat airbag that is arranged to receive the driver DM. In the driver's seat airbag 20, the contracted portion 48 is provided on the outer peripheral edge 43 of the vehicle body side wall base fabric 42 that is flatly deployed before the driver side wall portion (passenger side wall portion) 32 is coupled. Both opposing edges 46b, 46b of the substantially V-shaped notch 46 are configured as a notch-closing coupling portion 26 that is coupled to each other. When the airbag 20 is completely inflated, the bottom 46a of the notch 46 disposed with a predetermined dimension r2 from the inflow opening 24 is disposed on the outer side of the ring portion R. .

そのため、第１実施形態では、エアバッグ２０が膨張を完了させれば、切欠き塞ぎ用結合部２６による張出部２９の流入用開口２４側の面３０が、リング部Ｒの上面ＰＲ側における内周ＲＩ側から外周ＲＯ側にわたって張り付くように配置されて（図８，９参照）、リング部Ｒによる支持が安定して、高い展開高さＨ１と相俟って、運転者ＭＤを安定して受け止めることができる。   Therefore, in the first embodiment, when the airbag 20 is completely inflated, the surface 30 on the inflow opening 24 side of the overhanging portion 29 by the notch closing coupling portion 26 is located on the upper surface PR side of the ring portion R. Arranged so as to stick from the inner circumference RI side to the outer circumference RO side (see FIGS. 8 and 9), the support by the ring portion R is stable, and the driver MD is stabilized in combination with the high deployment height H1. Can be accepted.

特に、第１実施形態では、収縮部位４８としての切欠き塞ぎ用結合部２６（２６Ｆ，２６Ｂ）が、膨張完了時の車体側壁部２２の外周縁２３の前後に、配設されている（図８参照）。   In particular, in the first embodiment, the notch-closing coupling portion 26 (26F, 26B) as the contraction portion 48 is disposed before and after the outer peripheral edge 23 of the vehicle body side wall portion 22 when the expansion is completed (see FIG. 8).

そのため、第１実施形態では、エアバッグ２０が膨張する際における車両の衝突時、膨張完了時のエアバッグ２０は、切欠き塞ぎ用結合部２６Ｆ，２６Ｂによって形成される前後両側の張出部２９Ｆ，２９Ｂの流入用開口２４側の面３０がリング部Ｒに安定して支持されることから、前方移動してくる運転者ＭＤを、運転者側壁部３２の受止予定部３４によって、安定して受け止めて保護することができる。   Therefore, in the first embodiment, when the vehicle 20 is inflated when the airbag 20 is inflated, the airbag 20 at the completion of the inflation is the overhanging portion 29F on both the front and rear sides formed by the notch closing coupling portions 26F and 26B. 29B, the surface 30 on the inflow opening 24 side is stably supported by the ring portion R, so that the driver MD moving forward is stabilized by the scheduled receiving portion 34 of the driver side wall portion 32. Can be received and protected.

さらに、第１実施形態では、収縮部位４８としての切欠き塞ぎ用結合部２６（２６Ｌ，２６Ｒ）が、膨張完了時の車体側壁部２２の外周縁２３の左右にも、配設されている（図９参照）。   Further, in the first embodiment, the notch closing coupling portions 26 (26L, 26R) as the contraction portions 48 are also disposed on the left and right of the outer peripheral edge 23 of the vehicle body side wall portion 22 when the expansion is completed ( (See FIG. 9).

そのため、第１実施形態では、膨張完了時のエアバッグ２０は、前後左右の張出部２９Ｆ，２９Ｂ，２９Ｌ，２９Ｒの流入用開口２４側の面３０によって、前後左右の略全域にわたってリング部Ｒに安定して支持されることとなり、前方移動してくる運転者ＭＤが左右にずれても、運転者側壁部３２の受止予定部３４によって、安定した状態で、運転者ＭＤを受け止めて保護することができる。   Therefore, in the first embodiment, the airbag 20 at the completion of the inflation has the ring portion R over substantially the entire front, rear, left, and right by the surface 30 on the inflow opening 24 side of the front, rear, left and right overhang portions 29F, 29B, 29L, 29R. Even if the driver MD moving forward is shifted to the left and right, the driver MD receives and protects the driver MD in a stable state by the receiving scheduled portion 34 of the driver side wall 32. can do.

さらにまた、第１実施形態では、膨張完了時の車体側壁部２２の流入用開口２４の周縁（取付部２５）と乗員側壁部３２の受止予定部３４との離隔距離ＳＬを規制可能に、車体側壁部２２の流入用開口２４の周縁の取付部２５と乗員側壁部３２の受止予定部３４とを連結するテザー３７，３７が、配設されている。   Furthermore, in the first embodiment, it is possible to regulate the separation distance SL between the peripheral edge (attachment portion 25) of the inflow opening 24 of the vehicle body side wall portion 22 and the scheduled receiving portion 34 of the occupant side wall portion 32 when the expansion is completed. Tethers 37, 37 that connect the mounting portion 25 at the periphery of the inflow opening 24 of the vehicle body side wall portion 22 and the scheduled receiving portion 34 of the passenger side wall portion 32 are disposed.

そのため、第１実施形態では、膨張を完了させたエアバッグ２０は、展開高さＨ１を確保した状態で、テザー３７，３７により、受止予定部３４の流入用開口２４の周縁における取付部２５からの離隔距離ＳＬが規制されることから、車体側壁部２２における拡径部４４を設けたことによる膜長（周壁）の余裕のある部位、第１実施形態では張出部２９を、エアバッグ２０の収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）に対して、張り付かせるような状態を確保できて、収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）による支持を安定させて、運転者（乗員）ＭＤを受け止めることができる。また、運転者側壁部３２の中央付近に配置される受止予定部３４が、テザー３７，３７により、流入用開口２４の周縁からの離隔距離ＳＬを一定として配設されて、一層、平面状に配設されることが可能となって、運転者（乗員）ＭＤを広い面積の平面状部位の受止予定部３４により、受け止めることができる。   Therefore, in the first embodiment, the airbag 20 that has been inflated is attached to the attachment portion 25 at the periphery of the inflow opening 24 of the scheduled receiving portion 34 by the tethers 37 and 37 in a state where the deployment height H1 is secured. Since the separation distance SL from the vehicle is regulated, a portion having a margin of the film length (peripheral wall) due to the provision of the enlarged diameter portion 44 in the vehicle body side wall portion 22, the overhang portion 29 in the first embodiment, 20 can be secured to the periphery of the storage part 11 (the upper surface PR of the ring part R and the spoke part S), and the peripheral part of the storage part 11 (the upper surface PR of the ring part R and the spoke part S). ) Can be stabilized and the driver (occupant) MD can be received. Further, the scheduled receiving portion 34 disposed in the vicinity of the center of the driver side wall portion 32 is disposed by the tethers 37, 37 so that the separation distance SL from the peripheral edge of the inflow opening 24 is constant, and is further planar. Thus, the driver (occupant) MD can be received by the receiving scheduled portion 34 having a large planar area.

そしてさらに、第１実施形態のエアバッグ２０では、膨張完了時、リング部Ｒやスポーク部Ｓの上面ＰＲ側に、張出部２９の面３０が張り付くように圧接されることから、ステアリングホイールＷのリング部Ｒが小径としていても、上面ＰＲ側に隙間を設けること無く支持されて、受止予定部３４により運転者（乗員）ＭＤを受け止める際、リング部Ｒを大径としていたステアリングホイールに搭載されたと同様、若しくは、それ以上に、所定の反力を確保して、安定して受け止めることができる。   Further, in the airbag 20 of the first embodiment, when the inflation is completed, the surface 30 of the overhanging portion 29 is pressed against the upper surface PR side of the ring portion R and the spoke portion S so that the steering wheel W Even if the ring portion R has a small diameter, it is supported without a gap on the upper surface PR side, and when the driver (occupant) MD is received by the scheduled receiving portion 34, the ring portion R has a large diameter. A predetermined reaction force can be secured and received stably as in the case of mounting or more than that.

なお、第１実施形態では、エアバッグ２０の前後左右に切欠き塞ぎ用結合部２６による張出部２９を設けたが、図１０〜１３に示す第２実施形態のエアバッグ２０Ａのように、前後両側だけに、切欠き塞ぎ用結合部２６Ｆ，２６Ｂによる張出部２９Ｆ，２９Ｂを設けるようにしてもよい。このエアバッグ２０Ａでは、運転者側壁部３２は、第１実施形態と同様であるが、車体側壁部２２Ａが、図１０に示す車体側壁部用基布４２Ａから形成されており、車体側壁部用基布４２Ａは、前後両側だけに切欠き４６が設けられている構成としている。なお、車体側壁部用基布４２Ａは、切欠き４６，４６間の左右に拡径部４４Ａ，４４Ａを配設させ、各拡径部４４Ａは、外周縁４５を運転者側壁部３２を形成する乗員側壁部用基布６２の外周縁６３の半分の分割外周縁６４と同じ形状として、中心からの半径寸法ｒ１を、対応する乗員側壁部用基布６２の中心からの半径寸法ｒ０より大きくしている。   In addition, in 1st Embodiment, although the overhang | projection part 29 by the coupling part 26 for notch closure was provided in the front and rear, right and left of the airbag 20, like the airbag 20A of 2nd Embodiment shown in FIGS. You may make it provide the overhang | projection parts 29F and 29B by the coupling parts 26F and 26B for notch closing only in the front and back both sides. In this airbag 20A, the driver side wall portion 32 is the same as that in the first embodiment, but the vehicle body side wall portion 22A is formed from the vehicle body side wall portion base fabric 42A shown in FIG. The base fabric 42A has a configuration in which notches 46 are provided only on both front and rear sides. The vehicle body side wall base fabric 42 </ b> A is provided with enlarged diameter portions 44 </ b> A and 44 </ b> A on the left and right between the notches 46 and 46, and each enlarged diameter portion 44 </ b> A forms the driver's side wall portion 32 with the outer peripheral edge 45. The radial dimension r1 from the center is made larger than the radial dimension r0 from the center of the corresponding occupant side wall base fabric 62 in the same shape as that of the divided outer peripheral edge 64 which is half of the outer peripheral edge 63 of the occupant side wall base fabric 62. ing.

第２実施形態では、切欠き４６の対向縁４６ｂ，４６ｂ相互を縫合して形成した切欠き塞ぎ用結合部２６Ｆ，２６Ｂが、車体側壁部２２Ａの外周縁２３の前後の部位にだけ設けられ、エアバッグ２０Ａの膨張時、図１２，１３に示すように、前後の張出部２９Ｆ，２９Ｂの流入用開口２４側の面３０が、リング部Ｒの前後の部位ＲＦ，ＲＢにおける上面ＰＲ側により、安定して支持される。   In the second embodiment, notch closing coupling portions 26F and 26B formed by stitching the opposing edges 46b and 46b of the notch 46 are provided only at the front and rear portions of the outer peripheral edge 23 of the vehicle body side wall portion 22A. 12 and 13, when the airbag 20A is inflated, the surface 30 on the inflow opening 24 side of the front and rear projecting portions 29F and 29B is closer to the upper surface PR side of the front and rear portions RF and RB of the ring portion R. , Supported stably.

その結果、第２実施形態のエアバッグ２０Ａでも、膨張を完了させれば、切欠き塞ぎ用結合部２６Ｆ，２６Ｂによって形成される前後両側の張出部２９Ｆ，２９Ｂの流入用開口２４側の面３０がリング部Ｒに安定して支持されることから、前方移動してくる運転者ＭＤを、運転者側壁部３２の受止予定部３４によって、安定して受け止めて保護することができる。   As a result, even in the airbag 20A of the second embodiment, when the inflation is completed, the surface on the inflow opening 24 side of the overhanging portions 29F and 29B on both the front and rear sides formed by the notch closing coupling portions 26F and 26B. Since 30 is stably supported by the ring part R, the driver MD moving forward can be stably received and protected by the scheduled receiving part 34 of the driver side wall part 32.

また、このエアバッグ２０Ａでも、車体側壁部２２Ａが、流入用開口２４の周囲で、運転者側壁部（乗員側壁部）３２の中央付近の受止予定部３４から外周縁３２ｂまでの寸法ｒ０より大きくした半径寸法ｒ１の拡径部４４Ａを備えており、運転者側壁部３２より寸法ｒ１を大きくする拡径部４４Ａの膜長（周壁）の余裕分（ｒ１−ｒ０分）、運転者側壁部３２の展開高さＨ１を大きく確保できる。また、エアバッグ２０Ａの運転者側壁部３２は、単に、外周縁３２ｂを、収縮部位４８としての切欠き塞ぎ用結合部２６Ｆ，２６Ｂを設けた車体側壁部２２Ａの外周縁２３に結合させているだけであって、膨張完了時の中央付近の受止予定部３４を、極力、平坦状に維持でき、受け止める運転者（乗員）ＭＤを広い平面状の受止予定部３４により受け止めることができる。   Also in this airbag 20A, the vehicle body side wall 22A has a dimension r0 from the planned receiving portion 34 to the outer peripheral edge 32b near the center of the driver side wall (occupant side wall) 32 around the inflow opening 24. An enlarged diameter portion 44A having an enlarged radius dimension r1 is provided, and a margin (r1-r0 minutes) of the film length (peripheral wall) of the enlarged diameter portion 44A that makes the dimension r1 larger than the driver side wall part 32, the driver side wall part. A large unfolded height H1 of 32 can be secured. Further, the driver side wall portion 32 of the airbag 20A simply connects the outer peripheral edge 32b to the outer peripheral edge 23 of the vehicle body side wall portion 22A provided with the notch closing connecting portions 26F and 26B as the contraction portions 48. However, the receiving scheduled portion 34 near the center at the completion of the inflation can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide flat receiving scheduled portion 34.

なお、切欠き塞ぎ用結合部２６等の収縮部位４８としては、一つだけとしてもよい。例えば、切欠き塞ぎ用結合部２６を車体側壁部２２の外周縁２３の前縁側だけに設けて、すなわち、前端側の切欠き塞ぎ用結合部２６Ｆだけを設けるように、エアバッグ２０，２０Ａを構成してもよい。   It should be noted that only one contraction site 48 such as the notch closing coupling portion 26 may be provided. For example, the airbags 20 and 20A are provided so that the notch closing coupling portion 26 is provided only on the front edge side of the outer periphery 23 of the vehicle body side wall portion 22, that is, only the notch closing coupling portion 26F on the front end side is provided. It may be configured.

また、第１，２実施形態では、運転席用のエアバッグ２０，２０Ａについて説明したが、図１４に示す第３実施形態のように、助手席前方のインストルメントパネル（インパネ）ＩＰに搭載される助手席用エアバッグ装置Ｍ２のエアバッグ２０Ｂとして、構成してもよい。このエアバッグ２０Ｂは、第１実施形態と同様の構成としているが、略相似形として、大きく形成されている。すなわち、エアバッグ２０Ｂは、前後左右に切欠き塞ぎ用結合部２６を設けた車体側壁部用基布４２Ｂからなる車体側壁部２２Ｂと、中央付近に助手席用搭乗者としての乗員を受け止める受止予定部３４を設けた乗員側壁部用基布６２Ｂからなる乗員側壁部３２Ｂと、の外周縁２３，３２ｂ相互を縫合して形成されている。また、エアバッグ２０Ｂ内には、第１実施形態と同様に、テザー３７や整流布３８も、配設されている。   In the first and second embodiments, the airbags 20 and 20A for the driver's seat have been described. However, as in the third embodiment shown in FIG. 14, the airbag is mounted on the instrument panel (instrument panel) IP in front of the passenger seat. The airbag 20B of the passenger seat airbag device M2 may be configured. The airbag 20B has the same configuration as that of the first embodiment, but is largely formed as a substantially similar shape. That is, the airbag 20B receives the vehicle body side wall portion 22B composed of the vehicle body side wall portion base fabric 42B provided with the notch closing coupling portions 26 on the front, rear, left and right sides, and the passenger seat occupant as a passenger on the passenger seat near the center. It is formed by sewing the outer peripheral edges 23 and 32b of the occupant side wall portion 32B made of the occupant side wall portion base fabric 62B provided with the planned portion 34. Further, similarly to the first embodiment, a tether 37 and a rectifying cloth 38 are also arranged in the airbag 20B.

この第３実施形態の助手席用のエアバッグ２０Ｂは、助手席前方の車体側部位としてのインパネＩＰ内に、折り畳まれて収納され、インフレーター９からの膨張用ガスＧによって膨張すれば、乗員側壁部３２Ｂの受止予定部３４が、乗員としての助手席搭乗者を受け止めるように配設されることとなる。また、前後左右の切欠き塞ぎ用結合部２６により、前後左右の張出部２９の流入用開口２４側の面３０が、収納部位１１の周縁に張り付き、支持を安定させ、かつ、高い展開高さを確保して、エアバッグ２０Ｂが膨張を完了させることとなる。   If the airbag 20B for the passenger seat of the third embodiment is folded and housed in an instrument panel IP as a vehicle body side portion in front of the passenger seat and inflated by the inflation gas G from the inflator 9, the passenger side wall The scheduled receiving part 34 of the part 32B is arranged so as to receive the passenger on the passenger seat as the passenger. Further, the front / rear / left / right cut-off coupling portion 26 causes the surface 30 on the inflow opening 24 side of the front / rear / left / right overhang portion 29 to stick to the periphery of the storage portion 11, stabilizes the support, and increases the high deployment height. This ensures the air bag 20B and completes the inflation.

なお、第１，２実施形態では、車体側壁部２２と運転者側壁部３２との外周縁２３，３２ｂ相互を重ねて縫合できるように、収縮部位４８として、切込み塞ぎ用結合部２６を使用する場合を示したが、図１５〜１７に示す第４実施形態のエアバッグ２０Ｃのように、車体側壁部２２Ｃと運転者側壁部（乗員側壁部）３２Ｃとの外周縁２３，３２ｂ相互の結合時に、収縮部位４８Ｃを形成してもよい。   In the first and second embodiments, the incision / closing coupling portion 26 is used as the contraction portion 48 so that the outer peripheral edges 23 and 32b of the vehicle body side wall portion 22 and the driver side wall portion 32 can be overlapped and stitched together. Although the case was shown, like the airbag 20C of 4th Embodiment shown to FIGS. 15-17, when the outer periphery 23, 32b of the vehicle body side wall part 22C and the driver | operator side wall part (passenger side wall part) 32C mutually couple | bonds together The contraction site 48C may be formed.

すなわち、車体側壁部２２Ｃを形成する車体側壁部用基布４２Ｃが、運転者側壁部３２Ｃを形成する乗員側壁部用基布６２Ｃの半径寸法ｒ０より大きな半径寸法ｒ１の円板状として、全周にわたって拡径部４４Ｃを形成する構成としている。そして、エアバッグ２０Ｃの外周壁２１を形成する際、車体側壁部用基布４２Ｃの外周縁４３を、乗員側壁部用基布６２Ｃの外周縁６３に対して、いせこみしつつ、縫合糸９０を使用して縫合し、すなわち、いせこみによる収縮部位４８Ｃを形成しつつ、車体側壁部用基布４２Ｃからなる車体側壁部２２Ｃと乗員側壁部用基布６２Ｃからなる運転者側壁部３２Ｃとの外周縁２３，３２ｂ相互を縫合して、エアバッグ２０Ｃを製造してもよい。   That is, the vehicle body side wall portion base fabric 42C forming the vehicle body side wall portion 22C is formed into a disk shape having a radial dimension r1 larger than the radial dimension r0 of the passenger side wall portion base cloth 62C forming the driver side wall portion 32C. The enlarged diameter portion 44C is formed over the entire area. Then, when forming the outer peripheral wall 21 of the airbag 20C, the suture 90 is applied while the outer peripheral edge 43 of the vehicle body side wall base fabric 42C is swallowed with respect to the outer peripheral edge 63 of the passenger side wall base fabric 62C. , That is, a contracted portion 48C due to squeezing is formed, while the vehicle body side wall portion 22C composed of the vehicle body side wall portion base fabric 42C and the driver side wall portion 32C composed of the passenger side wall portion base fabric 62C. The airbag 20C may be manufactured by sewing the outer peripheral edges 23 and 32b together.

このエアバッグ２０Ｃでも、車体側壁部２２Ｃが、流入用開口２４の周囲で、運転者側壁部（乗員側壁部）３２Ｃの中央付近の受止予定部３４から外周縁３２ｂまでの寸法ｒ０より大きくした半径寸法ｒ１の拡径部４４Ｃを備えており、運転者側壁部３２Ｃより寸法ｒ１を大きくする拡径部４４Ｃの膜長（周壁）の余裕分（ｒ１−ｒ０分）、運転者側壁部３２Ｃの展開高さＨ１を大きく確保できる。また、運転者側壁部３２Ｃは、単に、外周縁３２ｂを、いせこみによる収縮部位４８Ｃを設けた車体側壁部２２Ｃの外周縁２３に結合させているだけであって、膨張完了時の中央付近の受止予定部３４を、極力、平坦状に維持でき、受け止める運転者（乗員）ＭＤを広い平面状の受止予定部３４により受け止めることができる。   Also in this airbag 20C, the vehicle body side wall portion 22C is larger than the dimension r0 around the inflow opening 24 from the planned receiving portion 34 near the center of the driver side wall portion (passenger side wall portion) 32C to the outer peripheral edge 32b. An enlarged portion 44C having a radial dimension r1 is provided, and a margin (r1-r0 minutes) of the film length (peripheral wall) of the enlarged diameter portion 44C that makes the dimension r1 larger than the driver side wall portion 32C, of the driver side wall portion 32C. A large deployment height H1 can be secured. Further, the driver side wall portion 32C simply connects the outer peripheral edge 32b to the outer peripheral edge 23 of the vehicle body side wall portion 22C provided with the contracted portion 48C due to squeezing, and the driver side wall portion 32C is located near the center when the expansion is completed. The scheduled receiving part 34 can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide scheduled receiving part 34.

したがって、第４実施形態のエアバッグ２０Ｃでも、膨張完了時の展開高さＨ１を確保できるとともに、広い平面状部位により運転者（乗員）ＭＤを受け止めることができる。   Therefore, even with the airbag 20C of the fourth embodiment, the deployment height H1 at the completion of inflation can be secured, and the driver (occupant) MD can be received by a wide planar portion.

さらに、第４実施形態のエアバッグ２０Ｃでも、膨張完了時の車体側壁部２２Ｃの流入用開口２４の周縁（取付部２５）と乗員側壁部３２Ｃの受止予定部３４との離隔距離ＳＬを規制可能に、車体側壁部２２Ｃの流入用開口２４の周縁の取付部２５と乗員側壁部３２Ｃの受止予定部３４とを連結するテザー３７，３７が、配設されている。   Furthermore, also in the airbag 20C of the fourth embodiment, the separation distance SL between the peripheral edge (attachment portion 25) of the inflow opening 24 of the vehicle body side wall portion 22C and the scheduled receiving portion 34 of the occupant side wall portion 32C is restricted when the inflation is completed. The tethers 37 and 37 that connect the mounting portion 25 at the periphery of the inflow opening 24 of the vehicle body side wall portion 22C and the scheduled receiving portion 34 of the passenger side wall portion 32C are disposed.

そのため、第４実施形態でも、膨張を完了させたエアバッグ２０Ｃは、展開高さＨ１を確保した状態で、テザー３７，３７により、受止予定部３４の流入用開口２４の周縁における取付部２５からの離隔距離ＳＬが規制されることから、車体側壁部２２Ｃにおける拡径部４４Ｃを設けたことによる膜長（周壁）の余裕のある部位、第４実施形態では、車体側壁部２２Ｃにおける流入用開口２４の周囲から外周縁２３までの略全域を、エアバッグ２０Ｃの収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）におけるリング部Ｒの内周ＲＩから外周ＲＯに対して、張り付くような張り出し膨張部３１Ｃとして、接触させることができる（図１７参照）。その結果、第４実施形態のエアバッグ２０Ｃでは、収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）による支持を安定させて、運転者（乗員）ＭＤを受け止めることができる。また、運転者側壁部３２Ｃの中央付近に配置される受止予定部３４が、テザー３７，３７により、流入用開口２４の周縁からの離隔距離ＳＬを一定として配設されて、一層、平面状に配設されることが可能となって、運転者ＭＤを広い面積の平面状部位の受止予定部３４により、受け止めることができる。   Therefore, also in the fourth embodiment, the airbag 20C that has been inflated has the mounting portion 25 at the periphery of the inflow opening 24 of the scheduled receiving portion 34 by the tethers 37 and 37 in a state where the deployment height H1 is secured. Since the separation distance SL from the vehicle is regulated, a portion having a margin of the film length (peripheral wall) by providing the enlarged diameter portion 44C in the vehicle body side wall portion 22C, in the fourth embodiment, for inflow in the vehicle body side wall portion 22C. The substantially entire region from the periphery of the opening 24 to the outer peripheral edge 23 is extended from the inner periphery RI of the ring portion R to the outer periphery RO at the periphery of the storage portion 11 of the airbag 20C (the upper surface PR of the ring portion R and the spoke portion S). It can be made to contact as 31 C of overhanging expansion parts which stick (refer FIG. 17). As a result, in the airbag 20C of the fourth embodiment, the support by the peripheral edge (the upper surface PR of the ring part R and the spoke part S) of the storage part 11 can be stabilized and the driver (occupant) MD can be received. Further, the scheduled receiving portion 34 disposed near the center of the driver side wall portion 32C is disposed by the tethers 37, 37 so that the separation distance SL from the peripheral edge of the inflow opening 24 is constant, and is further planar. Therefore, the driver MD can be received by the receiving scheduled portion 34 having a flat area having a large area.

さらに、車体側壁部と運転者側壁部（乗員側壁部）との外周縁相互の結合時に、平らに展開した状態で結合（縫合）できる収縮部位としては、図１８〜２１に示す第５実施形態のエアバッグ２０Ｄのように、タック５４（Ｆ，Ｂ）を設けた収縮部位４８Ｄとしてもよい。   Further, as a contraction site that can be joined (sewn) in a flatly deployed state when the outer peripheral edges of the vehicle body side wall portion and the driver side wall portion (passenger side wall portion) are joined together, a fifth embodiment shown in FIGS. Like the airbag 20D, the contracted portion 48D provided with the tack 54 (F, B) may be used.

第５実施形態のエアバッグ２０Ｄでは、車体側壁部２２Ｄが前後両側に設けたタック５４Ｆ，５４Ｂにより、収縮部位４８Ｄを形成している。すなわち、車体側壁部２２Ｄを形成する車体側壁部用基布４２Ｄでは、前後両側に、運転者側壁部（乗員側壁部）３２Ｄを形成する円板状の乗員側壁部用基布６２Ｄの半径寸法ｒ０（図１９参照）より半径寸法ｒ１を大きくした拡径部４４Ｄを設け、そして、運転者側壁部３２Ｄの円形の外周縁３２ｂに対応させるように、拡径部４４Ｄに折り重ねたタック５４（Ｆ，Ｂ）を設けてなる収縮部位４８Ｄを形成し、車体側壁部用基布４２Ｄの外周縁４３を、円板状の車体側壁部２２Ｄの外周縁２３としている。   In the airbag 20D of the fifth embodiment, the contracted portion 48D is formed by the tacks 54F and 54B provided on the front and rear sides of the vehicle body side wall 22D. That is, in the vehicle body side wall base fabric 42D that forms the vehicle body side wall portion 22D, the radial dimension r0 of the disk-shaped passenger side wall portion base fabric 62D that forms the driver side wall portion (occupant side wall portion) 32D on both front and rear sides. (See FIG. 19) An enlarged diameter portion 44D having a larger radial dimension r1 is provided, and a tack 54 (F) folded on the enlarged diameter portion 44D so as to correspond to the circular outer peripheral edge 32b of the driver side wall portion 32D. , B) is formed, and the outer peripheral edge 43 of the vehicle body side wall base fabric 42D is used as the outer peripheral edge 23 of the disc-shaped vehicle body side wall part 22D.

そのため、タック５４（Ｆ，Ｂ）による収縮部位４８Ｄを設けた車体側壁部２２Ｄは、その外周縁２３を、運転者側壁部３２Ｄの外周縁３２ｂと同じ寸法にできて、平らに重ねて、相互に平面縫製することができ、エアバッグ２０Ｄの外周壁２１を容易に製造できる。   Therefore, the vehicle body side wall portion 22D provided with the contracted portion 48D by the tack 54 (F, B) can have the outer peripheral edge 23 of the same size as the outer peripheral edge 32b of the driver side wall portion 32D, and are overlapped with each other. The outer peripheral wall 21 of the airbag 20D can be easily manufactured.

そして、この第５実施形態のエアバッグ２０Ｄでも、車体側壁部２２Ｄが、流入用開口２４の周囲で、運転者側壁部（乗員側壁部）３２Ｄの中央付近の受止予定部３４から外周縁３２ｂまでの寸法ｒ０より大きくした半径寸法ｒ１の拡径部４４Ｄを備えており、運転者側壁部３２Ｄより寸法ｒ１を大きくする拡径部４４Ｄの膜長（周壁）の余裕分（ｒ１−ｒ０分）、運転者側壁部３２Ｄの展開高さＨ１を大きく確保できる。また、運転者側壁部３２Ｄは、単に、外周縁３２ｂを、タック５４Ｆ，５４Ｂによる収縮部位４８Ｄを設けた車体側壁部２２Ｄの外周縁２３に結合させているだけであって、膨張完了時の中央付近の受止予定部３４を、極力、平坦状に維持でき、受け止める運転者（乗員）ＭＤを広い平面状の受止予定部３４により受け止めることができる。   Also in the airbag 20D of the fifth embodiment, the vehicle body side wall portion 22D has an outer peripheral edge 32b around the inflow opening 24 from the scheduled receiving portion 34 near the center of the driver side wall portion (passenger side wall portion) 32D. A diameter-enlarged portion 44D having a radius dimension r1 larger than the dimension r0 up to and a margin (r1-r0 minutes) of the film length (peripheral wall) of the diameter-enlarged portion 44D larger than the driver side wall portion 32D. The deployment height H1 of the driver side wall portion 32D can be secured large. Further, the driver side wall portion 32D simply connects the outer peripheral edge 32b to the outer peripheral edge 23 of the vehicle body side wall portion 22D provided with the contracted portion 48D by the tacks 54F and 54B, and the center when the expansion is completed. The nearby receiving scheduled portion 34 can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide planar receiving scheduled portion 34.

したがって、第５実施形態のエアバッグ２０Ｄでも、膨張完了時の展開高さＨ１を確保できるとともに、広い平面状部位により運転者（乗員）ＭＤを受け止めることができる。   Therefore, even with the airbag 20D of the fifth embodiment, the deployment height H1 at the completion of inflation can be secured, and the driver (occupant) MD can be received by a wide planar portion.

勿論、この第５実施形態のエアバッグ２０Ｄでも、膨張完了時の車体側壁部２２Ｄの流入用開口２４の周縁（取付部２５）と乗員側壁部３２Ｄの受止予定部３４との離隔距離ＳＬを規制可能に、車体側壁部２２Ｄの流入用開口２４の周縁の取付部２５と乗員側壁部３２Ｄの受止予定部３４とを連結するテザー３７，３７が、配設されている。   Of course, also in the airbag 20D of the fifth embodiment, the separation distance SL between the peripheral edge (attachment portion 25) of the inflow opening 24 of the vehicle body side wall portion 22D and the scheduled receiving portion 34 of the occupant side wall portion 32D when inflation is completed. Tethers 37, 37 that connect the mounting portion 25 at the periphery of the inflow opening 24 of the vehicle body side wall portion 22D and the scheduled receiving portion 34 of the occupant side wall portion 32D are disposed so as to be able to be regulated.

そのため、第５実施形態でも、膨張を完了させたエアバッグ２０Ｄは、展開高さＨ１を確保した状態で、テザー３７，３７により、受止予定部３４の流入用開口２４の周縁における取付部２５からの離隔距離ＳＬが規制されることから、車体側壁部２２Ｄにおける拡径部４４Ｄを設けたことによる膜長（周壁）の余裕のある部位、第５実施形態では、車体側壁部２２Ｄにおける流入用開口２４の周囲から前後の外周縁２３までの領域を、エアバッグ２０Ｄの収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）におけるリング部Ｒの内周ＲＩから外周ＲＯに対して、張り付くような張り出し膨張部３１Ｄとして、接触させることができる。その結果、第５実施形態のエアバッグ２０Ｄでは、収納部位１１の周縁におけるリング部Ｒの前後の部位ＲＦ，ＲＢによる支持を安定させて、運転者（乗員）ＭＤを受け止めることができる。また、運転者側壁部３２Ｄの中央付近に配置される受止予定部３４が、テザー３７，３７により、流入用開口２４の周縁からの離隔距離ＳＬを一定として配設されて、一層、平面状に配設されることが可能となって、運転者ＭＤを広い面積の平面状部位の受止予定部３４により、受け止めることができる。   Therefore, also in the fifth embodiment, the airbag 20D that has been inflated has the mounting portion 25 at the periphery of the inflow opening 24 of the scheduled receiving portion 34 by the tethers 37 and 37 in a state where the deployment height H1 is secured. Since the separation distance SL from the vehicle is regulated, a portion having a margin of the film length (peripheral wall) by providing the enlarged diameter portion 44D in the vehicle body side wall portion 22D, in the fifth embodiment, for inflow in the vehicle body side wall portion 22D. The region from the periphery of the opening 24 to the front and rear outer peripheral edges 23 is from the inner periphery RI of the ring portion R to the outer periphery RO at the periphery of the storage portion 11 of the airbag 20D (the upper surface PR of the ring portion R and the spoke portion S). It can be made to contact as an overhanging expansion part 31D which sticks. As a result, in the airbag 20D of the fifth embodiment, the support by the parts RF and RB before and after the ring portion R on the periphery of the storage part 11 can be stabilized and the driver (occupant) MD can be received. Further, the scheduled receiving portion 34 disposed in the vicinity of the center of the driver side wall portion 32D is disposed by the tethers 37, 37 so that the separation distance SL from the peripheral edge of the inflow opening 24 is constant, and is further planar. Therefore, the driver MD can be received by the receiving scheduled portion 34 having a flat area having a large area.

さらに、車体側壁部と運転者側壁部（乗員側壁部）との外周縁相互の結合時に、平らに展開した状態で結合（縫合）できる収縮部位としては、図２２〜２４に示す第６実施形態のエアバッグ２０Ｅのように、例えば、前部側に一つのタック５４Ｆを設けた収縮部位４８Ｅとしてもよい。   Furthermore, as a contraction portion that can be joined (sewn) in a flatly deployed state when the outer peripheral edges of the vehicle body side wall portion and the driver side wall portion (passenger side wall portion) are joined together, a sixth embodiment shown in FIGS. As in the airbag 20E, for example, a contracted region 48E provided with one tack 54F on the front side may be used.

第６実施形態のエアバッグ２０Ｅでは、車体側壁部２２Ｅが前側に設けたタック５４Ｆにより、収縮部位４８Ｅを形成している。すなわち、車体側壁部２２Ｅを形成する車体側壁部用基布４２Ｅでは、前側に、運転者側壁部（乗員側壁部）３２Ｅを形成する円板状の乗員側壁部用基布６２Ｅ（図１９に示す乗員側壁部用基布６２Ｄと同じである）の半径寸法ｒ０より半径寸法ｒ１を大きくした拡径部４４Ｅを設け、そして、運転者側壁部３２Ｅの円形の外周縁３２ｂに対応させるように、拡径部４４Ｅに折り重ねたタック５４Ｆを設けてなる収縮部位４８Ｅを形成し、車体側壁部用基布４２Ｅの外周縁４３を、円板状の車体側壁部２２Ｅの外周縁２３としている。   In the airbag 20E of the sixth embodiment, the contracted portion 48E is formed by the tack 54F provided on the front side of the vehicle body side wall 22E. That is, in the vehicle body side wall base fabric 42E that forms the vehicle body side wall portion 22E, a disc-shaped passenger side wall portion base fabric 62E (shown in FIG. 19) that forms the driver side wall portion (occupant side wall portion) 32E on the front side. The enlarged diameter portion 44E having a larger radial dimension r1 than the radial dimension r0 of the passenger side wall portion base fabric 62D) is provided, and is expanded so as to correspond to the circular outer peripheral edge 32b of the driver side wall portion 32E. A contracted portion 48E is formed by providing a tuck 54F folded on the diameter portion 44E, and the outer peripheral edge 43 of the vehicle body side wall base fabric 42E is used as the outer peripheral edge 23 of the disk-shaped vehicle body side wall 22E.

そのため、タック５４Ｆによる収縮部位４８Ｅを設けた車体側壁部２２Ｅは、その外周縁２３を、運転者側壁部３２Ｅの外周縁３２ｂと同じ寸法にできて、平らに重ねて、相互に平面縫製することができ、エアバッグ２０Ｅの外周壁２１を容易に製造できる。   Therefore, the vehicle body side wall portion 22E provided with the contracted portion 48E by the tack 54F can have the outer peripheral edge 23 of the same size as the outer peripheral edge 32b of the driver side wall portion 32E, overlapped flatly, and plane-sewn to each other. The outer peripheral wall 21 of the airbag 20E can be easily manufactured.

そして、この第６実施形態のエアバッグ２０Ｅでも、車体側壁部２２Ｅが、流入用開口２４の周囲で、運転者側壁部（乗員側壁部）３２Ｅの中央付近の受止予定部３４から外周縁３２ｂまでの寸法ｒ０より大きくした半径寸法ｒ１の拡径部４４Ｅを備えており、運転者側壁部３２Ｅより寸法ｒ１を大きくする拡径部４４Ｅの膜長（周壁）の余裕分（ｒ１−ｒ０分）、運転者側壁部３２Ｅの展開高さＨ１を大きく確保できる。また、運転者側壁部３２Ｅは、単に、外周縁３２ｂを、タック５４Ｆによる収縮部位４８Ｅを設けた車体側壁部２２Ｅの外周縁２３に結合させているだけであって、膨張完了時の中央付近の受止予定部３４を、極力、平坦状に維持でき、受け止める運転者（乗員）ＭＤを広い平面状の受止予定部３４により受け止めることができる。   Also in the airbag 20E of the sixth embodiment, the vehicle body side wall portion 22E has an outer peripheral edge 32b from the scheduled receiving portion 34 near the center of the driver side wall portion (passenger side wall portion) 32E around the inflow opening 24. A diameter-enlarged portion 44E having a radius dimension r1 larger than the dimension r0 up to and a margin (r1-r0 minutes) of the film length (peripheral wall) of the diameter-enlarged portion 44E larger than the driver side wall portion 32E. In addition, the development height H1 of the driver side wall 32E can be ensured. Further, the driver side wall portion 32E simply connects the outer peripheral edge 32b to the outer peripheral edge 23 of the vehicle body side wall portion 22E provided with the contracted portion 48E by the tack 54F. The scheduled receiving part 34 can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide scheduled receiving part 34.

したがって、第６実施形態のエアバッグ２０Ｅでも、膨張完了時の展開高さＨ１を確保できるとともに、広い平面状部位により運転者（乗員）ＭＤを受け止めることができる。   Accordingly, even with the airbag 20E of the sixth embodiment, the deployment height H1 at the completion of inflation can be secured, and the driver (occupant) MD can be received by a wide planar portion.

勿論、この第６実施形態のエアバッグ２０Ｅでも、膨張完了時の車体側壁部２２Ｅの流入用開口２４の周縁（取付部２５）と乗員側壁部３２Ｄの受止予定部３４との離隔距離ＳＬを規制可能に、車体側壁部２２Ｅの流入用開口２４の周縁の取付部２５と乗員側壁部３２Ｅの受止予定部３４とを連結するテザー３７，３７が、配設されている。   Of course, also in the airbag 20E of the sixth embodiment, the separation distance SL between the peripheral edge (attachment portion 25) of the inflow opening 24 of the vehicle body side wall portion 22E and the scheduled receiving portion 34 of the occupant side wall portion 32D when inflation is completed. Tethers 37, 37 that connect the attachment portion 25 at the periphery of the inflow opening 24 of the vehicle body side wall portion 22E and the scheduled receiving portion 34 of the occupant side wall portion 32E are disposed so as to be able to be regulated.

そのため、第６実施形態でも、膨張を完了させたエアバッグ２０Ｅは、展開高さＨ１を確保した状態で、テザー３７，３７により、受止予定部３４の流入用開口２４の周縁における取付部２５からの離隔距離ＳＬが規制されることから、車体側壁部２２Ｅにおける拡径部４４Ｅを設けたことによる膜長（周壁）の余裕のある部位、第６実施形態では、車体側壁部２２Ｅにおける流入用開口２４の周囲から前側の外周縁２３までの領域を、エアバッグ２０Ｅの収納部位１１の周縁（リング部Ｒやスポーク部Ｓの上面ＰＲ）におけるリング部Ｒの内周ＲＩから外周ＲＯに対して、張り付くような張り出し膨張部３１Ｅとして、接触させることができる。その結果、第６実施形態のエアバッグ２０Ｅでは、収納部位１１の周縁におけるリング部Ｒの前部ＲＦよる支持を安定させて、運転者（乗員）ＭＤを受け止めることができる。勿論、運転者側壁部３２Ｅの中央付近に配置される受止予定部３４が、テザー３７，３７により、流入用開口２４の周縁からの離隔距離ＳＬを一定として配設されて、一層、平面状に配設されることが可能となって、運転者ＭＤを広い面積の平面状部位の受止予定部３４により、受け止めることができる。   Therefore, also in the sixth embodiment, the airbag 20E that has been inflated has the mounting portion 25 at the periphery of the inflow opening 24 of the scheduled receiving portion 34 by the tethers 37 and 37 in a state where the deployment height H1 is secured. Since the separation distance SL from the vehicle is regulated, a portion having a margin of the film length (peripheral wall) by providing the enlarged diameter portion 44E in the vehicle body side wall portion 22E, in the sixth embodiment, for inflow in the vehicle body side wall portion 22E. The region from the periphery of the opening 24 to the outer periphery 23 on the front side extends from the inner periphery RI of the ring portion R to the outer periphery RO at the periphery of the storage portion 11 of the airbag 20E (the upper surface PR of the ring portion R and the spoke portion S). It can be made to contact as an overhanging expansion part 31E which sticks. As a result, in the airbag 20E of the sixth embodiment, the support by the front portion RF of the ring portion R at the periphery of the storage portion 11 can be stabilized and the driver (occupant) MD can be received. Of course, the receiving part 34 arranged near the center of the driver side wall part 32E is arranged by the tethers 37, 37 so that the separation distance SL from the peripheral edge of the inflow opening 24 is constant, and is further planar. Therefore, the driver MD can be received by the receiving scheduled portion 34 having a flat area having a large area.

なお、各実施形態において、膨張完了時の展開高さＨ１を確保できるように、膜長差（ｒ１−ｒ０）を設ける場合、収納部位の周縁への良好な張り付きを確保できる点を考慮すれば、拡径部４４，４４Ａ，４４Ｃ，４４Ｄ，４４Ｅの半径寸法ｒ１は、対応する乗員側壁部３２，３２Ｂ，３２Ｃ，３２Ｄ，３２Ｅの半径寸法ｒ０の約１．２〜１．６倍程度が望ましい（第１実施形態の拡径部４４の半径寸法ｒ１は、運転者側壁部３２の半径寸法ｒ０の約１．４倍）。１．２倍未満では、展開高さＨ１を高くする効果が十分で無く、１．６倍を越えては、車体側壁部側の容積が大きくなりすぎて、収納部位の周縁からの突出量が多くなって、収納部位の周縁からの安定した支持を得難くなって、好ましくないからである。   In each embodiment, when the film length difference (r1-r0) is provided so as to ensure the development height H1 at the completion of the expansion, it is possible to secure a good sticking to the periphery of the storage site. The radial dimension r1 of the enlarged diameter parts 44, 44A, 44C, 44D, 44E is preferably about 1.2 to 1.6 times the radial dimension r0 of the corresponding occupant side wall parts 32, 32B, 32C, 32D, 32E. (The radial dimension r1 of the enlarged diameter portion 44 of the first embodiment is about 1.4 times the radial dimension r0 of the driver side wall portion 32). If it is less than 1.2 times, the effect of increasing the development height H1 is not sufficient, and if it exceeds 1.6 times, the volume on the side wall of the vehicle body becomes too large, and the amount of protrusion from the periphery of the storage part is small. This is because it becomes difficult to obtain a stable support from the periphery of the storage portion, which is not preferable.

２０，２０Ａ，２０Ｂ，２０Ｃ，２０Ｄ，２０Ｅ…エアバッグ、２２，２２Ａ，２２Ｂ，２２Ｃ，２２Ｄ，２２Ｅ…車体側壁部、２３…外周縁、２４…流入用開口、２６（Ｆ，Ｂ，Ｌ，Ｒ）…切欠き塞ぎ用結合部、３２，３２Ｂ，３２Ｃ，３２Ｄ，３２Ｅ…（乗員側壁部）運転者側壁部、３２ｂ…外周縁、３４…受止予定部、３７…テザー、４２．４２Ａ，４２Ｃ，４２Ｄ，４２Ｅ…車体側壁部用基布、４３…外周縁、４４，４４Ａ，４４Ｃ，４４Ｄ，４４Ｅ…拡径部、４６…切欠き、４６ａ…底部、４６ｂ…対向縁、４８，４８Ｃ，４８Ｄ，４８Ｅ…収縮部位、６２，６２Ｃ，６２Ｄ，６２Ｅ…乗員側壁部用基布、６３…外周縁、
Ｗ…（車体側部材）ステアリングホイール、Ｒ…リング部、ｒ０…（乗員側壁部の）寸法、ｒ１…（拡径部の）寸法、ＳＬ…（取付部と受止予定部）離隔距離、ＭＤ…（乗員）運転者。 20, 20A, 20B, 20C, 20D, 20E ... airbag, 22, 22A, 22B, 22C, 22D, 22E ... vehicle body side wall part, 23 ... outer periphery, 24 ... inflow opening, 26 (F, B, L, R)... Notch closing coupling part, 32, 32B, 32C, 32D, 32E (Occupant side wall part) Driver side wall part, 32b ... Outer peripheral edge, 34 ... Receiving scheduled part, 37 ... Tether, 42.42A, 42C, 42D, 42E: Base fabric for vehicle body side wall portion, 43: Outer peripheral edge, 44, 44A, 44C, 44D, 44E ... Expanded portion, 46 ... Notch, 46a ... Bottom portion, 46b ... Opposing edge, 48, 48C, 48D, 48E ... contraction site, 62, 62C, 62D, 62E ... occupant side wall fabric, 63 ... outer periphery,
W ... (vehicle body side member) steering wheel, R ... ring part, r0 ... dimension of occupant side wall part, r1 ... dimension of enlarged diameter part, SL ... (mounting part and planned receiving part) separation distance, MD ... (Crew) Driver.

Claims (10)

中央付近に乗員を受け止めるための受止予定部を有した乗員側壁部と、中央付近に膨張用ガスを流入させるための流入用開口を有した車体側壁部と、を備えて構成されるとともに、前記乗員側壁部と前記車体側壁部との外周縁相互を結合させて外周壁が構成されるエアバッグであって、
前記車体側壁部が、
前記乗員側壁部との結合前における車体側壁部用基布を平らに展開した状態として、前記流入用開口から外周縁までの寸法を、平らに展開した前記乗員側壁部の中央付近から、前記流入用開口から前記外周縁までの方向に対応した前記乗員側壁部の外周縁までの寸法より、大きくした拡径部、を有して構成されるとともに、
該拡径部に連なる前記車体側壁部用基布の外周縁に、前記乗員側壁部の外周縁との結合時に、前記乗員側壁部の外周縁と結合可能に寸法を合わせる収縮部位を配設させて、前記乗員側壁部の外周縁と結合されていることを特徴とするエアバッグ。 An occupant side wall having a receiving part for receiving an occupant near the center, and a vehicle body side wall having an inflow opening for allowing inflation gas to flow in the vicinity of the center. An airbag in which an outer peripheral wall is configured by combining outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion,
The side wall of the vehicle body is
In the state where the vehicle body side wall base fabric is unfolded flatly before being joined to the occupant side wall, the inflow from the inflow opening to the outer peripheral edge is measured from the center of the flat fold out occupant side wall. And having an enlarged diameter portion larger than the dimension from the opening to the outer periphery of the occupant side wall corresponding to the direction from the outer periphery,
On the outer peripheral edge of the vehicle body side wall portion base fabric connected to the enlarged diameter portion, a contraction portion that is dimensioned so as to be connectable with the outer peripheral edge of the occupant side wall portion is disposed at the time of connection with the outer peripheral edge of the occupant side wall portion. The airbag is combined with an outer peripheral edge of the occupant side wall. 前記収縮部位が、前記乗員側壁部の外周縁と前記車体側壁部の外周縁とを平らに重ねて結合可能とするように、配設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。   2. The air according to claim 1, wherein the contraction portion is disposed so that an outer peripheral edge of the occupant side wall portion and an outer peripheral edge of the vehicle body side wall portion can be overlapped and joined together. bag. 前記収縮部位が、前記乗員側壁部との結合前における平らに展開した前記車体側壁部用基布の外周縁に設けられた略Ｖ字状の切欠きにおける対向する両縁を、相互に結合させてなる切欠き塞ぎ用結合部、として構成されていることを特徴とする請求項２に記載のエアバッグ。   The contracted portion connects opposite edges of a substantially V-shaped notch provided on the outer periphery of the base fabric for the vehicle body side wall portion that is flatly developed before the connection with the passenger side wall portion. The airbag according to claim 2, wherein the airbag is configured as a notch closing coupling portion. 前記収縮部位が、前記車体側壁部の外周縁に、複数配設されていることを特徴とする請求項１乃至請求項３のいずれか１項に記載のエアバッグ。   The airbag according to any one of claims 1 to 3, wherein a plurality of the contracted portions are disposed on an outer peripheral edge of the vehicle body side wall. ステアリングホイールにおける乗員としての運転者が把持するリング部の中央のボス部に、折り畳まれて収納され、膨張時の前記乗員側壁部の前記受止予定部が、運転者を受け止めるように配設されていることを特徴とする請求項１乃至請求項３のいずれか１項に記載のエアバッグ。   The steering wheel is folded and stored in a central boss portion of a ring portion that is held by a driver as an occupant, and the expected receiving portion of the occupant side wall portion when inflated is arranged to receive the driver. The airbag according to any one of claims 1 to 3, wherein the airbag is provided. 前記収縮部位が、前記乗員側壁部との結合前における平らに展開した前記車体側壁部用基布の外周縁に設けられた略Ｖ字状の切欠きにおける対向する両縁を、相互に結合させてなる切欠き塞ぎ用結合部、として構成されるとともに、
膨張完了時に、前記切欠きの底部が、前記リング部の外方側に、配設される構成としていることを特徴とする請求項５に記載のエアバッグ。 The contracted portion connects opposite edges of a substantially V-shaped notch provided on the outer periphery of the base fabric for the vehicle body side wall portion that is flatly developed before the connection with the passenger side wall portion. It is configured as a notch plug joint,
6. The airbag according to claim 5, wherein the bottom portion of the notch is arranged on the outer side of the ring portion when the inflation is completed. 前記収縮部位が、膨張完了時の前記車体側壁部の外周縁の前後両側に、配設されていることを特徴とする請求項６に記載のエアバッグ。   The airbag according to claim 6, wherein the contracted portions are disposed on both front and rear sides of the outer peripheral edge of the vehicle body side wall portion when the inflation is completed. 前記収縮部位が、膨張完了時の前記車体側壁部の外周縁の左右両側にも、配設されていることを特徴とする請求項７に記載のエアバッグ。   The airbag according to claim 7, wherein the contracted portions are also disposed on both left and right sides of an outer peripheral edge of the vehicle body side wall portion when the inflation is completed. 助手席前方の車体側部位に、折り畳まれて収納され、膨張時の前記乗員側壁部の前記受止予定部が、乗員としての助手席搭乗者を受け止めるように配設されていることを特徴とする請求項１乃至請求項３のいずれか１項に記載のエアバッグ。   Folded and stored in a vehicle body side portion in front of the passenger seat, and the receiving portion of the passenger side wall portion when inflated is disposed so as to receive a passenger on the passenger seat as an occupant The airbag according to any one of claims 1 to 3. 膨張完了時の前記車体側壁部の前記流入用開口の周縁と前記乗員側壁部の前記受止予定部との離隔距離を規制可能に、前記車体側壁部の前記流入用開口の周縁と前記乗員側壁部の前記受止予定部とを連結するテザーが、配設されていることを特徴とする請求項１乃至請求項９のいずれか１項に記載のエアバッグ。   The peripheral edge of the inflow opening of the vehicle body side wall portion and the occupant side wall are capable of regulating a separation distance between the peripheral edge of the inflow opening of the vehicle body side wall portion and the scheduled receiving portion of the occupant side wall portion when the inflation is completed The airbag according to any one of claims 1 to 9, wherein a tether that connects the scheduled receiving portion of the portion is disposed.
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