JP6806005B2 - Airbag - Google Patents

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JP6806005B2
JP6806005B2 JP2017162307A JP2017162307A JP6806005B2 JP 6806005 B2 JP6806005 B2 JP 6806005B2 JP 2017162307 A JP2017162307 A JP 2017162307A JP 2017162307 A JP2017162307 A JP 2017162307A JP 6806005 B2 JP6806005 B2 JP 6806005B2
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side wall
wall portion
outer peripheral
peripheral edge
occupant
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石黒 直彦
直彦 石黒
渉 三浦
渉 三浦
雅美 柴田
雅美 柴田
良太郎 石田
良太郎 石田
弘幸 中西
弘幸 中西
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Toyoda Gosei Co Ltd
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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 is used in an airbag device mounted on a vehicle and can suitably receive and protect an occupant such as a driver or a passenger seat occupant in the event of a vehicle collision.

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, a occupant side wall portion having a receiving portion for receiving an occupant near the center and a vehicle body side wall portion having an inflow opening for inflowing expansion gas near the center. In addition to being provided, there are some that form an outer peripheral wall by connecting the outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion to each other (for example, Patent Document 1). In this airbag, the occupant side wall before coupling and the vehicle body side wall are both disk-shaped, but the occupant side wall is large-diameter disk-shaped, so that the outer peripheral edge of the occupant side wall is shrunk. It was formed by connecting with the outer peripheral edge of the side wall of the vehicle body while squeezing. In this airbag, since the occupant side wall portion has a large area, the planned receiving portion of the occupant side wall portion has a shape that protrudes in a large convex shape to complete the expansion.

特開平7−172257号公報Japanese Unexamined Patent Publication No. 7-172257

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 side wall of the occupant when the expansion is completed secures the deployment height and protrudes greatly toward the occupant so that the occupant can be received quickly. Since the shape protrudes roundly toward the occupant, there is room for improvement in that the occupant is received by a wide flat 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。 An object of the present invention is to solve the above-mentioned problems, and to provide an airbag that can secure a deployment height at the completion of expansion and can receive an occupant by a wide flat 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。
The airbag according to the present invention includes 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 expansion gas to flow in near the center. An airbag in which the outer peripheral wall is formed by connecting the outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion to each other.
The side wall of the car body
Assuming that the base cloth for the side wall of the vehicle body is flatly unfolded before being connected to the side wall of the occupant, the dimension from the inflow opening to the outer peripheral edge is measured from the vicinity of the center of the side wall of the occupant, which is flatly unfolded. It is configured to have an enlarged diameter portion that is larger than the dimension from the outer peripheral edge of the occupant side wall portion corresponding to the direction from the opening to the outer peripheral edge.
On the outer peripheral edge of the base cloth for the side wall portion of the vehicle body connected to the enlarged diameter portion, a contraction portion whose dimensions are adjusted so as to be coupled with the outer peripheral edge of the occupant side wall portion when the outer peripheral edge of the occupant side wall portion is connected is arranged. Therefore, it is characterized in that it is connected to the outer peripheral edge of the occupant side wall portion.

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 side wall portion of the vehicle body is provided with an enlarged diameter portion around the inflow opening, which is larger than the dimension from the planned receiving portion to the outer peripheral edge near the center of the side wall portion of the occupant. It is possible to secure a large deployment height of the occupant side wall portion by the margin of the film length (peripheral wall) of the enlarged diameter portion whose size is larger than that of the portion. In addition, the occupant side wall portion simply connects the outer peripheral edge to the outer peripheral edge of the vehicle body side wall portion provided with the contraction portion, and the planned receiving portion near the center when the expansion is completed is made as flat as possible. It can be maintained in a shape, and the occupant who receives it can be received by the planned receiving portion of a wide flat 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, the deployment height at the completion of expansion can be secured, and the occupant can be received by the wide flat 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 contraction portion is arranged 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 flatly overlapped and joined.

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 connecting the outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion to each other so as to form the outer peripheral wall of the airbag, the outer peripheral edges are overlapped flatly to form an industrial sewing machine or the like. Since it can be easily connected by the plane sewing or the like used, the work of connecting the outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion becomes easy, and the outer peripheral wall of the airbag can be efficiently manufactured.

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 mutually opposed to each other in a substantially V-shaped notch provided on the outer peripheral edge of the base cloth for the side wall portion of the vehicle body which is flatly developed before being connected to the side wall portion of the occupant. It is desirable that it is configured as a notch closing joint formed by being coupled to.

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 side wall portion of the vehicle body has an expanded completed shape near the bottom (tip) of the notch provided with the notch closing joint as a substantially conical ridge portion with the bottom of the notch as the top. Inflate. Therefore, in the vicinity of the notch closing joint on the side wall of the vehicle body when the expansion of the airbag is completed, the shape extends from the outer peripheral edge of the side wall of the occupant to the opening side for inflow, and is simply curved toward the opening side for inflow. Rather, it extends downward along the notch closing joint from the outer peripheral edge of the occupant side wall along the central axis of the inflow opening, and the apex of the substantially conical ridge (bottom of the notch). ), It has a shape that extends to the inflow opening side as a surface along the planned receiving portion of the occupant side wall. That is, the notch closing joint near the outer peripheral edge of the side wall of the vehicle body forms a thick overhang extending downward along the central axis of the inflow opening to increase the volume and air. The surface of the overhanging portion on the inflow opening side can be easily brought into contact with the peripheral edge of the storage portion where the bag was stored so as to be attached. Therefore, when the airbag completes the expansion, it becomes easy to support the inflow opening side surface of the overhanging portion formed by the notch closing joint portion on the peripheral edge on the storage portion side, and the occupant receiving of the airbag. The reaction force at the time of stopping can be quickly secured. As a result, in the airbag having such a configuration, when the expansion is completed, the deployment height can be secured by providing the enlarged diameter portion, and the surface of the overhanging portion on the inflow opening side is stable from the peripheral edge of the storage portion. It is possible to secure the support and receive the occupants 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。 As the airbag according to the present invention, the contraction portion may be formed on the outer peripheral edge of the side wall portion of the vehicle body, but may be arranged in a plurality.

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。 That is, the contraction portion is provided on the outer peripheral edge of the side wall portion of the vehicle body connected to the diameter expansion portion, and if there are many contraction portions, the margin of the film length due to the diameter expansion portion that can secure the deployment height can be increased. Therefore, the deployment height of the airbag when the expansion is completed can be stably secured high 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。 Further, in the airbag according to the present invention, the airbag is folded and stored in the central boss portion of the ring portion gripped by the driver as the occupant on the steering wheel, and the expected receiving portion of the occupant side wall portion when expanded is formed. , It can be configured as a driver's seat airbag that is arranged 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。
When the airbag according to the present invention is configured as a driver's seat airbag, the contracted portion is the outer peripheral edge of the base cloth for the side wall portion of the vehicle body which is flatly developed before being connected to the side wall portion of the occupant. In addition to being configured as a notch closing joint portion formed by connecting both opposite edges of a substantially V-shaped notch provided in the above to each other.
It is desirable that the bottom portion of the notch is arranged 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 completes expansion, the surface on the inflow opening side of the overhanging portion by the notch closing joint portion sticks from the inner peripheral side to the outer peripheral side on the upper surface side of the ring portion. It is arranged in, and the support by the ring part is stable, and in combination with the high deployment height, the driver can be stably received.

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 contraction portions are arranged in front of and behind the outer peripheral edge of the vehicle body side wall portion when the expansion is completed, the airbag when the airbag expands, the airbag collides with the vehicle, and the airbag when the expansion is completed, The driver who is stably supported by the ring portions on both the front and rear sides and moves forward can be stably received and protected by the expected 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 contraction portion is also arranged on the left and right sides of the outer peripheral edge of the vehicle body side wall portion when the expansion is completed, the airbag at the time of the completion of expansion is stable in the ring portion over substantially the entire front, rear, left and right sides. Even if the driver moving forward shifts to the left or right, the driver can be received and protected in a stable state by the planned receiving portion of the side wall of the occupant.

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。 Then, in the airbag according to the present invention, the airbag is folded and stored in the vehicle body side portion in front of the passenger seat, and the expected receiving portion of the occupant side wall portion when inflated receives the passenger seat occupant as an occupant. It can also be configured as a passenger seat airbag arranged in.

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。 Further, in the airbag according to the present invention, it is possible to regulate the separation distance between the peripheral edge of the inflow opening of the vehicle body side wall portion and the occupant side wall portion to be received when the expansion is completed. It is desirable that a tether that connects the peripheral edge of the inflow opening and the planned receiving portion of the occupant side wall portion 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, the airbag that has been inflated has a tether that regulates the separation distance from the peripheral edge of the inflow opening of the planned receiving portion while the deployment height is secured. It is possible to secure a state in which a portion having a margin of membrane length (peripheral wall) due to the provision of the enlarged diameter portion is attached to the peripheral edge of the airbag storage portion, and the peripheral portion of the storage portion supports the portion. Can be stabilized and catch the occupants. Further, the planned receiving portion arranged near the center of the occupant side wall portion can be arranged by the tether at a constant separation distance from the peripheral edge of the inflow opening, and can be further arranged in a flat shape. Therefore, the occupant can be received by the planned 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 state of the driver's seat airbag apparatus in which the driver's seat airbag 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 vertical sectional view of the airbag device for a driver's seat of 1st Embodiment, and corresponds to the part II-II 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 a schematic perspective view seen from the side of the occupant side wall portion (driver side wall portion) in the state where the driver's seat airbag of the first embodiment is inflated by itself. 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 a schematic perspective view seen from the side of the side wall portion of the vehicle body in the state where the airbag for the driver's seat of 1st Embodiment is inflated by itself. 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 vertical sectional view of the state in which the driver's seat airbag of 1st Embodiment is inflated by itself. 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 comprises the driver's seat airbag of 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 notch closing joint part in the base cloth for the body side wall part for forming the car 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 vertical sectional view along the front-rear direction which shows the operation time of the driver's seat airbag device 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 vertical sectional view along the left-right direction which shows the operation time of the driver's seat airbag device 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 driver's seat airbag 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 notch closing joint part in the base cloth for the body side wall part for forming the body side wall part of the 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 the schematic perspective view of the expanded state of the driver's seat airbag of the 2nd 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 vertical sectional view along the front-rear direction which shows the operation time of the driver's seat airbag device 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 vertical sectional view which shows the use state of the airbag for a passenger seat 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 comprises the airbag of 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 vertical sectional view of the state in which the airbag of 4th Embodiment is inflated by itself. 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 vertical sectional view along the front-rear direction which shows the operation time of the driver's seat airbag device 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 cloth for the vehicle body side wall part 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 vertical sectional view of the state in which the airbag of 5th Embodiment is inflated by itself. 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 vertical sectional view along the front-rear direction which shows the operation time of the driver's seat airbag device 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 of manufacturing the 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 vertical sectional view of the state in which the airbag of the sixth embodiment is inflated by itself. 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 vertical sectional view along the front-rear direction which shows the operation time of the driver's seat airbag device 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 of the first embodiment is the driver's seat airbag 20, and the driver's seat airbag. The airbag device M1 in which 20 is used is a driver's 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 arranged above the central boss portion B of the steering wheel main body 1. The steering wheel body 1 includes an annular ring portion R held by the driver as a occupant during steering, a boss portion B arranged in the center of the ring portion R and fastened to the steering shaft SS, and a boss portion B and a ring. It is configured to include four spoke portions S that connect the portions 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 corresponds to the axial direction of the steering shaft SS during straight-ahead steering of the vehicle. The front-rear direction orthogonal to the above corresponds, and 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。 Further, in the steering wheel W of the illustrated example, the external 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 arranged so as to connect each portion of the ring portion R, the boss portion B, and the spoke portion S, and includes a metal core metal 2 such as an aluminum alloy. It is composed. A coating layer 4 made of synthetic resin is coated on the ring portion R portion of the core metal 2 and the ring portion R side portion of each spoke portion S. A steel boss 3 for inserting the steering shaft SS and fixing the nut N is provided at the portion of the boss portion B of the core metal 2. Further, a lower cover 5 made of synthetic resin that covers the lower part of the boss portion B is arranged below the steering wheel main body 1.

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 airbag device M1 includes an airbag 20 that is folded and stored, an inflator 9 that supplies expansion gas to the airbag 20, and an airbag that covers the upper part of the folded airbag 20. It is configured to include a cover 15, a case 11 for storing and holding the airbag 20 and the inflator 9 and holding the airbag cover 15, and a retainer 7 for attaching the airbag 20 to the case 11 together with the inflator 9.

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 square ring sheet metal, presses the peripheral edge 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. Bolts 7a that are nut-fastened to the case 11 are provided at the four corners so as to be attached.

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 is configured to include a columnar main body portion 9a having a plurality of gas discharge ports 9b on 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 is passed.

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 arranged above the boss portion B of the steering wheel W to form 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 into which the main body portion 9a of the inflator 9 can be inserted from below, and four penetrations through which the bolt 7a of the retainer 7 is penetrated. A hole 11c (see FIG. 1) is formed. A mounting piece 11e extending outward is formed at the upper end of the side wall portion 11d extending upward from the outer peripheral edge of the bottom wall portion 11a, and the mounting board 13a of the horn switch mechanism 13 is mounted on the mounting piece 11e (FIG. 9). (See), the case 11 is mounted and fixed to the core metal 2 of the steering wheel W by using the mounting board 13a, and the airbag device M1 is attached to the upper part of the boss portion B of the steering wheel body 1 already mounted on the steering shaft SS. It will be installed. Further, a side wall portion 17 of the airbag cover 15 is attached to the side wall portion 11d of the case 11 by 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 has a ceiling wall portion 16 that covers the upper part of the stored airbag 20 and a substantially square cylinder that extends downward from the vicinity of the outer peripheral edge of the ceiling wall portion 16. It is configured to include a side wall portion 17 having a shape. The ceiling wall portion 16 is formed with two door portions 16a, 16a that are pushed by the expanding airbag 20 and open on both 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 of a cloth material woven with a weaving thread such as polyamide or polyester, and as shown in FIGS. 1 to 5, the expanded shape is substantially circular when viewed from above (specifically, a rounded abbreviation). It is configured to have a substantially cylindrical shape (specifically, a substantially square columnar shape with curved sides), and as shown in FIGS. 3 to 5, 8 and 9, the outer peripheral wall 21 is on the vehicle body side. The steering wheel main body 1 side (ring portion R side) of the vehicle body side wall portion 22 and the occupant side wall portion (driver side wall portion) 32 of the driver MD (see FIG. 8) side as a occupant are provided. Has been done.

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 of the disc-shaped occupant side wall portion base cloth 62 shown in FIG. 6, and the vicinity of the center 32a is a receiving portion scheduled to receive 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 disk shape from the vehicle body side wall portion base cloth 42, and the expansion gas is allowed to flow into the center of the vehicle body side wall portion 22. An inflow opening 24 that opens in a circular shape is provided. A mounting hole 25a through which each bolt 7a of the retainer 7 for mounting the airbag 20 to the bottom wall portion 11a of the case 11 is formed is formed on the peripheral edge of the inflow opening 24. The arrangement portion of the mounting hole 25a on the peripheral edge of the inflow opening 24 constitutes the mounting portion 25 that is pressed by the retainer 7 and mounted on the bottom wall portion 11a of the case 11. When the expansion of the airbag 20 is completed, the vehicle body side wall portion 22 is the 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 and the spoke portion S of the steering wheel W as the 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 portion 22 and the driver side wall portion 32 to each other.

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 when the expansion is completed is provided with ridge portions 27 (overhanging portions 29) protruding in a substantially conical shape at four locations in front, back, left and right 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 of the ridges 27 is connected so as to close the V-shaped notches 46 arranged at four positions on the front, back, left and right of the outer peripheral edge 43 of the base cloth 42 for the side wall portion of the vehicle body shown in FIGS. It is formed by letting it. 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 to each other by sewing using a suture thread 90 to form a notch closing joint 26. By doing so, when the expansion of the airbag 20 is completed, a substantially conical ridge portion 27 having a top portion 28 near the bottom portion 46a of the notch 46 is formed.

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 base cloth 42 for the side wall portion of the vehicle body 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, from the inflow opening 24 to the outer peripheral edge. The dimension (radial dimension) r0 from the center 32a to the outer peripheral edge 63 of the occupant side wall base cloth 61 having the same direction up to 45 is set larger than the dimension (radial dimension) r0, and the portion between the notches 46 is the corresponding occupant side wall. The enlarged diameter portion 44 has a larger size than the base cloth 61 for the portion. However, the outer peripheral edge 45 of each enlarged diameter portion 44 has the same shape as the divided outer peripheral edge 64 in which the outer peripheral edge 63 of the base cloth 61 for the occupant side wall portion is evenly divided 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 joint portion 26 is formed on the vehicle body side wall portion base cloth 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 cloth 62. The outer peripheral edge 23 of the vehicle body side wall portion 22 is formed in an annular shape having the same dimensions as the outer peripheral edge 63 (corresponding to the outer peripheral edge 32b of the driver side wall portion 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 forming the outer peripheral wall 21 of the airbag 20, the outer peripheral edges 23 and 32b can be stacked flat on each other and can be easily sewn together using an industrial sewing machine. Can be done.

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。 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 the film length with respect to the dimension r0 of the occupant side wall portion 32 of the corresponding portion. A difference (r1-r0) is generated, and an adjustment folding portion 50 is provided so as to absorb the difference in film length, and is developed flat so as to overlap the driver side wall portion 32. In the case of the first embodiment, the adjustment folding portion 50 is formed by providing a crease (folding portion) 51 near the notch closing joint portion 26 and a slack 52 around the mounting portion 25 (see FIG. 7). ). Then, the vehicle body side wall portion 22 having the diameter-expanded portion 44 by providing these adjusting folding portions 50 can be unfolded flat and can be overlapped with the driver side wall portion 32 unfolded flat.

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 portion 46a of the notch 46 is such that when the expansion of the airbag 20 in the mounted state on the steering wheel W is completed, the top 28 of each protrusion 27 corresponding to the bottom portion 46a is on the outer side of the ring portion R. It 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 minutes so as to be arranged in.

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 practical length dimensions at the time of suturing, and in the case of the figure, they correspond to the predetermined inflow opening 24 and the center of the driver side wall portion (occupant side wall portion). 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 sewn to the mounting portion 25 of the vehicle body side wall portion 22, and the rectifying cloth 39 is sewn to the reinforcing cloths 70 and 82 and the rectifying cloth 39. And the mounting hole 25a are penetrated. The reinforcing cloths 70 and 82 and the rectifying cloth 39 are connected to the vehicle body side wall portion 22 by a sewn portion (not shown in the figure) sewn 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 tubular shape with openings on both the front and rear sides (see FIG. 8), and is arranged so that the expansion 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 portion 79 sewn to the attachment portion 25 on the peripheral edge of the inflow opening 24, and two connecting piece portions 80 and 80 extending from the left and right sides of the main body portion 79. The main body portion 79 is sewn to the mounting portion 25, and the tips 80a of the connecting piece portions 80 and 80 are sewn to each other to be arranged.

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 planned receiving portion 34 in a state where a predetermined deployment height H1 (see FIG. 5) of the planned receiving portion 34 of the driver side wall portion 32 is secured. Tethers 37 and 37 connecting the peripheral edge of the inflow opening 24 and the planned receiving portion 34 are arranged on the left and right sides of the inflow opening 24 so as to specify the distance SL (see FIG. 5) (FIG. 5). 9). In the case of the first embodiment, the tethers 37 and 37 have a reinforcing cloth 70 with legs sewn to the attachment portion 25 on the periphery of the inflow opening 24 and a ceiling panel 74 with legs sewn to the planned receiving portion 34. And are formed from. The reinforcing cloth 70 with legs is configured to include a main body 71 sewn to the mounting portion 25 and legs 72 and 72 extending from both the left and right sides of the main body 71, and the ceiling panel 74 with legs receives. It is configured to include a main body portion 75 sewn to the planned stop portion 34, and legs 76 and 76 extending from both the left and right sides of the main body portion 75. The tethers 37 and 37 are formed by suturing the legs 72 and 76 to each other. That is, the upper portion 37a side of each tether 37 is formed from the leg portion 76 extending from the main body portion 75 of the ceiling panel 74 with legs sewn to the receiving portion 34, and the lower portion 37b side of each tether 37 is formed on the mounting portion 25. It is formed from a leg portion 72 extending from a main body portion 71 of the sewn legged reinforcing cloth 70.

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 the manufacture of the airbag 20, first, the driver side wall portion 32 and the vehicle body side wall portion 22 are manufactured, respectively. In the manufacture of the driver side wall portion 32, the main body portion 75 of the ceiling panel 74 with legs and the reinforcing cloth 83 may be sewn together on the portion of the base cloth 62 for the occupant side wall portion to be received. 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, in a state where the inflow opening 24 and the mounting hole 25a are not provided, the main body portion 71 of the reinforcing cloth 70 with legs is placed on the mounting portion 25 of the vehicle body side wall portion base cloth 42. The main body 79 of the base cloth 78 for the rectifying cloth and the reinforcing cloth 82 are overlapped and sewn, and then the inflow opening 24 and the mounting hole 25a are formed by drilling. Then, if the opposing edges 46b of each notch 46 are sewn together to form the notch closing joint 26, the vehicle body side wall 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。 After that, while aligning the surfaces of the side wall portion 22 of the vehicle body and the side wall portion 32 of the driver on the outer surface side, the outer peripheral edges 23 and 32b are overlapped with each other and placed on the workbench of the industrial sewing machine. The outer peripheral wall 21 of the airbag 20 can be manufactured by suturing the outer peripheral edges 23 and 32b to each other and turning it over using the inflow opening 24. Then, the legs 72, 76 and the connecting piece 80 are pulled out from the inflow opening 24, and the corresponding legs 72, 76 and the tips 80a of the connecting pieces 80, 80 are sewn together to sew those stitched parts. If the airbag 20 is returned to the inside of the airbag 20, the airbag 20 provided with the tether 37 and the rectifying 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。 Then, 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 prevention 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 further, the main body portion 9a of the inflator 9 is moved from below to the bottom wall portion. By inserting it into the insertion hole 11b of 11a, passing each bolt 7a of the retainer 7 through the through hole 9d of the flange portion 9c, and fastening a nut (not shown) to each bolt 7a, the airbag can be inserted into the case 11 as a storage part. The 20 and the inflator 9 can be stored, and the airbag 20 and the inflator 9 can be attached by using the retainer 7. Further, the case 11 is covered with the airbag cover 15, the side wall portions 11d and 17 are connected to each other by using rivets 14 and the like, the airbag cover 15 is attached to the case 11, and further, the attachment piece 11e of the case 11 is attached. By assembling the horn switch mechanism 13, the airbag device M1 can be assembled. Then, the airbag device M1 can be mounted on the vehicle by mounting the airbag device M1 on the steering wheel body 1 fastened to the steering shaft SS in advance by using the mounting board 13a of the horn switch mechanism 13. The airbag device M1 can be mounted on the 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 mounting on the vehicle, when the expansion gas G is operated so as to flow into the airbag 20 through the inflow opening 24, the expansion gas G causes the airbag. 20 expands and pushes open the door portions 16a and 16a of the airbag cover 15, and the airbag 20 becomes a case as a storage part as shown by the two-point chain line in FIGS. 1 and 2 and the solid line in FIGS. 8 and 9. It protrudes from 11 and covers the upper surface PR side of the ring portion R and the spoke portion S, and completes the expansion so as to be supported by the upper surface PR side thereof.

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。 Then, in the driver's seat airbag 20 of the first embodiment, the vehicle body side wall portion 22 is located around the inflow opening 24 from the receiving portion 34 near the center of the driver side wall portion (occupant side wall portion) 32. A diameter-expanded portion 44 having a dimension r1 larger than the dimension r0 up to the outer peripheral edge 32b is provided, and a margin (r1-r0) for the film length (peripheral wall) of the diameter-expanded portion 44 having a diameter r1 larger than the driver side wall portion 32 Dimensional difference), a large deployment height H1 of the driver side wall portion 32 can be secured. Further, the driver side wall portion 32 simply connects the outer peripheral edge 32b to the outer peripheral edge 23 of the vehicle body side wall portion 22 provided with the contraction portion 48 (notch closing joint portion 26), and expands. 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 scheduled receiving 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 expansion can be secured, and the driver MD can be received by the wide flat 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 contraction portion 48 (the notch closing joint portion 26) is the outer peripheral edge 32b of the driver side wall portion (passenger 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 stacked flat and can be combined. 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 (63) of the above is equally divided into four to have the same shape as the divided outer peripheral edge 64. Therefore, the outer peripheral edge 23 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. Since it has the same shape as the outer peripheral edge 32b (63) of the driver side wall portion 32, it can be vertically stacked and connected to each other.

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 portion 32 and the vehicle body side wall portion 22 are connected to each other so as to form the outer peripheral wall 21 of the airbag 20, the outer peripheral edges 32b and 23 are mutually connected. Can be easily connected by flat sewing using an industrial sewing machine by stacking them flatly, 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 efficiently manufactured.

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 provided with a substantially V-shaped notch 46 provided on the outer peripheral edge 43 of the base cloth 42 for the side wall portion of the vehicle body which is flatly developed before being connected to the side wall portion 32 of the driver. The two opposite edges 46b and 46b in the above are configured as a notch closing joint portion 26 formed by connecting the two edges 46b and 46b 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、下方側に延びる略円錐状の突条部27からなる厚肉の張出部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 side wall portion 22 of the vehicle body has an expansion completed shape near the bottom (tip) 46a of the notch 46 provided with the notch closing joint 26, and the bottom 46a of the notch 46 is defined as the top 28. It expands by providing a conical ridge 27 (see FIGS. 4, 5, 8 and 9). Therefore, in the vicinity of the notch closing joint 26 in the vehicle body side wall 22 when the expansion of the airbag 20 is completed, the shape extends from the outer peripheral edge 32b of the driver side wall (occupant side wall) 32 toward the inflow opening 24. The shaft of the steering shaft SS is not simply narrowed toward the inflow opening 24 side in a curved shape, but is along the central axis C1 (see FIG. 5) of the inflow opening 24 from the outer peripheral edge 32b of the driver side wall portion 32. In the direction, i.e. along the vertical direction), it extends downward along the notch closing joint 26 and bends near the top 28 of the substantially conical ridge 27 (bottom 46a of the notch 46). As a surface 30 along the planned receiving portion 34 of the driver side wall portion 32, the shape extends toward the inflow opening 24 side. That is, the notch closing joint 26 near the outer peripheral edge 23 of the vehicle body side wall 22 has a thick wall formed of a substantially conical ridge 27 extending downward along the central axis C1 of the inflow opening 24. The overhanging portion 29 is formed to increase the volume, and the overhanging portion 29 flows into the peripheral edge of the storage portion 11 (the upper surface PR of the ring portion R and the spoke portion S) in which the airbag 20 is stored. The surface 30 on the side of the opening 24 can be easily brought into contact with each other so as to be attached (see FIGS. 8 and 9). Therefore, when the airbag 20 completes the expansion, the surface 30 on the inflow opening 24 side of the overhanging portion 29 formed by the notch closing joint 26 is turned to the peripheral edge (ring portion R or the ring portion R) on the storage portion 11 side. It becomes easy to support the upper surface PR of the spoke portion S), and the reaction force when the airbag 20 is received by the driver can be quickly secured. As a result, in the airbag 20 having such a configuration, when the expansion is completed, a high deployment height H1 can be secured by providing the enlarged diameter portion 44, and the surface 30 on the inflow opening 24 side of the overhanging portion 29 can be secured. , Stable support can be secured from the peripheral edge of the storage portion 11 (the upper surface PR of the ring portion R and the spoke portion 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, the airbag 20 of the first embodiment is folded into a boss portion B (specifically, case 11 of the airbag device M1) at the center of the ring portion R held by the driver MD as a occupant on the steering wheel W. It is configured as an airbag for the driver's seat so that the expected receiving portion 34 of the driver side wall portion (passenger side wall portion) 32 when expanded is arranged so as to receive the driver DM. Then, in the driver's seat airbag 20, the contracted portion 48 is provided on the outer peripheral edge 43 of the base cloth 42 for the side wall portion of the vehicle body which is flatly deployed before being connected to the side wall portion (passenger side wall portion) 32 of the driver. It is configured as a notch closing joint 26 formed by connecting both opposite edges 46b and 46b in a substantially V-shaped notch 46 to each other. Then, when the expansion of the airbag 20 is completed, the bottom portion 46a of the notch 46, which is arranged with a predetermined dimension r2 from the inflow opening 24, is arranged 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 completes the expansion, the surface 30 on the inflow opening 24 side of the overhanging portion 29 by the notch closing coupling portion 26 is on the upper surface PR side of the ring portion R. Arranged so as to stick from the inner peripheral RI side to the outer peripheral RO side (see FIGS. 8 and 9), the support by the ring portion R is stable, and in combination with the high deployment height H1, the driver MD is stabilized. 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 joints 26 (26F, 26B) as the contraction portions 48 are arranged before and after the outer peripheral edge 23 of the vehicle body side wall portion 22 when the expansion is completed (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 collides when the airbag 20 expands, and when the expansion is completed, the airbag 20 has the front and rear overhanging portions 29F formed by the notch closing joints 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 expected 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 joints 26 (26L, 26R) as the contraction portions 48 are also arranged on the left and right sides 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 time of completion of expansion 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 overhanging portions 29F, 29B, 29L, 29R. Even if the driver MD moving forward shifts to the left or right, the driver MD is received and protected in a stable state by the expected receiving portion 34 of the driver side wall portion 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, the separation distance SL between the peripheral edge (mounting portion 25) of the inflow opening 24 of the vehicle body side wall portion 22 and the planned receiving portion 34 of the occupant side wall portion 32 at the completion of expansion can be regulated. Tethers 37 and 37 are arranged to connect the attachment portion 25 on the periphery of the inflow opening 24 of the vehicle body side wall portion 22 and the receiving portion 34 of the occupant side wall portion 32.

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 completed expansion is attached by the tethers 37 and 37 at the peripheral edge of the inflow opening 24 of the planned receiving portion 34 in a state where the deployment height H1 is secured. Since the separation distance SL from the vehicle body is regulated, a portion having a margin of film length (peripheral wall) due to the provision of the enlarged diameter portion 44 on the side wall portion 22 of the vehicle body, the overhanging portion 29 in the first embodiment, is provided as an airbag. It is possible to secure a state of sticking to the peripheral edge of the storage portion 11 of 20 (the upper surface PR of the ring portion R and the spoke portion S), and the peripheral edge of the storage portion 11 (the upper surface PR of the ring portion R and the spoke portion S). ) Can be stabilized and the driver (occupant) MD can be received. Further, the planned receiving portion 34 arranged near the center of the driver side wall portion 32 is arranged by the tethers 37 and 37 with a constant separation distance SL from the peripheral edge of the inflow opening 24, and is further flattened. The driver (occupant) MD can be received by the receiving portion 34 of the flat portion having a wide 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 expansion 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 providing a gap on the upper surface PR side, and when the driver (occupant) MD is received by the planned receiving portion 34, the ring portion R has a large diameter on the steering wheel. As well as or more than the mounted reaction force, a predetermined reaction force can be secured and the reaction force can be stably received.

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 the first embodiment, the overhanging portions 29 by the notch closing joints 26 are provided on the front, rear, left and right sides of the airbag 20, but as in the airbag 20A of the second embodiment shown in FIGS. 10 to 13, Overhanging portions 29F and 29B by the notch closing joints 26F and 26B may be provided only on both the front and rear sides. In this airbag 20A, the driver side wall portion 32 is the same as in the first embodiment, but the vehicle body side wall portion 22A is formed from the vehicle body side wall portion base cloth 42A shown in FIG. The base cloth 42A has a structure in which notches 46 are provided only on both front and rear sides. The base cloth 42A for the side wall portion of the vehicle body is provided with enlarged diameter portions 44A and 44A on the left and right between the notches 46 and 46, and each of the enlarged diameter portions 44A forms the outer peripheral edge 45 as the driver side wall portion 32. Half of the outer peripheral edge 63 of the occupant side wall base cloth 62 has the same shape as the outer peripheral edge 64, and the radius dimension r1 from the center is made larger than the radial dimension r0 from the center of the corresponding occupant side wall base cloth 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, the notch closing joints 26F and 26B formed by stitching the opposing edges 46b and 46b of the notch 46 to each other are provided only in the front and rear portions of the outer peripheral edge 23 of the vehicle body side wall portion 22A. When the airbag 20A is inflated, as shown in FIGS. 12 and 13, the surface 30 on the inflow opening 24 side of the front and rear overhanging portions 29F and 29B is formed by the upper surface PR side of the front and rear portions RF and RB of the ring portion R. , Stable and supported.

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 expansion is completed, the surfaces of the inflow openings 24 side of the front and rear overhangs 29F and 29B formed by the notch closing joints 26F and 26B. Since the 30 is stably supported by the ring portion R, the driver MD moving forward can be stably received and protected by the receiving portion 34 of the driver side wall portion 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。 Further, also in this airbag 20A, the vehicle body side wall portion 22A is located around the inflow opening 24 from the dimension r0 from the expected receiving portion 34 to the outer peripheral edge 32b near the center of the driver side wall portion (passenger side wall portion) 32. A diameter-expanded portion 44A having an enlarged radius dimension r1 is provided, and a margin (r1-r0 minutes) for the film length (peripheral wall) of the diameter-expanded portion 44A that increases the dimension r1 from the driver side wall portion 32, and the driver side wall portion A large deployment 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 joints 26F and 26B as the contraction portion 48. However, the scheduled receiving portion 34 near the center when the expansion is completed can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide flat scheduled receiving 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。 In addition, only one contraction site 48 such as the notch closing joint 26 may be used. For example, the airbags 20 and 20A are provided so that the notch closing joint 26 is provided only on the front edge side of the outer peripheral edge 23 of the vehicle body side wall portion 22, that is, only the notch closing joint 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。 Further, in the first and second embodiments, the airbags 20 and 20A for the driver's seat have been described, but as in the third embodiment shown in FIG. 14, they are mounted on the instrument panel (instrument panel) IP in front of the passenger seat. It may be configured as the airbag 20B of the passenger seat airbag device M2. The airbag 20B has the same configuration as that of the first embodiment, but is formed to have a substantially similar shape. That is, the airbag 20B receives the vehicle body side wall portion 22B made of the vehicle body side wall portion base cloth 42B provided with the notch closing joints 26 on the front, rear, left and right sides, and the passenger seat occupant near the center. It is formed by suturing the outer peripheral edges 23 and 32b of the occupant side wall portion 32B made of the occupant side wall portion base cloth 62B provided with the planned portion 34. Further, in the airbag 20B, a tether 37 and a rectifying cloth 38 are also arranged as in the first embodiment.

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。 The passenger seat airbag 20B of the third embodiment is folded and stored in the instrument panel IP as a vehicle body side portion in front of the passenger seat, and if expanded by the expansion gas G from the inflator 9, the occupant side wall. The scheduled reception unit 34 of the unit 32B is arranged so as to receive the passenger seat occupant as a occupant. Further, the front, rear, left and right notch closing joints 26 allow the front, rear, left and right overhangs 29 to have the surface 30 on the inflow opening 24 side to stick to the peripheral edge of the storage portion 11, stabilize the support, and have a high deployment height. This ensures that the airbag 20B completes the expansion.

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 joint 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 sewn on top of each other. Although the case is shown, when the outer peripheral edges 23 and 32b of the vehicle body side wall portion 22C and the driver side wall portion (occupant side wall portion) 32C are connected to each other as in the airbag 20C of the fourth embodiment shown in FIGS. , 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 base cloth 42C for the side wall portion of the vehicle body forming the side wall portion 22C of the vehicle body forms a disk shape having a radius dimension r1 larger than the radius dimension r0 of the base cloth 62C for the side wall portion of the occupant 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 thread 90 is squeezed into the outer peripheral edge 43 of the base cloth 42C for the side wall portion of the vehicle body with respect to the outer peripheral edge 63 of the base cloth 62C for the side wall portion of the occupant. That is, while forming the contraction portion 48C due to the airbag, the vehicle body side wall portion 22C made of the vehicle body side wall portion base cloth 42C and the driver side wall portion 32C made of the occupant side wall portion base cloth 62C are sewn together. The airbag 20C may be manufactured by suturing the outer peripheral edges 23 and 32b to each other.

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 from the expected receiving portion 34 to the outer peripheral edge 32b near the center of the driver side wall portion (occupant side wall portion) 32C around the inflow opening 24. A diameter-expanded portion 44C having a radial dimension r1 is provided, and a margin (r1-r0 minutes) for the film length (peripheral wall) of the diameter-expanded portion 44C that makes the dimension r1 larger than the driver side wall portion 32C, and 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 contraction portion 48C due to squeezing, and is near the center when the expansion is completed. The scheduled receiving portion 34 can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide flat scheduled receiving portion 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 in the airbag 20C of the fourth embodiment, the deployment height H1 at the completion of expansion can be secured, and the driver (occupant) MD can be received by the wide flat 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。 Further, also in the airbag 20C of the fourth embodiment, the separation distance SL between the peripheral edge (mounting portion 25) of the inflow opening 24 of the vehicle body side wall portion 22C and the planned receiving portion 34 of the occupant side wall portion 32C when the expansion is completed is regulated. Tethers 37, 37 for connecting the attachment portion 25 on the peripheral edge of the inflow opening 24 of the vehicle body side wall portion 22C and the receiving portion 34 of the occupant side wall portion 32C are arranged so as to be possible.

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, even in the fourth embodiment, the airbag 20C that has completed the expansion has the attachment portion 25 at the peripheral edge of the inflow opening 24 of the planned 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 body is regulated, a portion having a margin of film length (peripheral wall) due to the provision of the enlarged diameter portion 44C in the vehicle body side wall portion 22C, in the fourth embodiment, for inflow at the vehicle body side wall portion 22C. Approximately the entire area from the periphery of the opening 24 to the outer peripheral edge 23 is covered from the inner peripheral RI of the ring portion R to the outer peripheral RO at the peripheral edge 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 brought into contact as a sticking overhanging expansion portion 31C (see FIG. 17). As a result, in the airbag 20C of the fourth embodiment, the support by the peripheral edge of the storage portion 11 (the upper surface PR of the ring portion R and the spoke portion S) can be stabilized, and the driver (occupant) MD can be received. Further, the planned receiving portion 34 arranged near the center of the driver side wall portion 32C is arranged by the tethers 37 and 37 with a constant separation distance SL from the peripheral edge of the inflow opening 24, and is further flattened. The driver MD can be received by the receiving portion 34 of the flat portion 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 portion that can be connected (sewn) in a flatly deployed state when the outer peripheral edges of the vehicle body side wall portion and the driver side wall portion (occupant side wall portion) are connected to each other, the fifth embodiment shown in FIGS. The contraction portion 48D provided with the tack 54 (F, B) may be used as in the airbag 20D of the above.

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 contraction portion 48D is formed by the tacks 54F and 54B provided on the front and rear side walls of the vehicle body side wall portion 22D. That is, in the vehicle body side wall base cloth 42D forming the vehicle body side wall portion 22D, the radial dimension r0 of the disk-shaped occupant side wall portion base cloth 62D forming the driver side wall portion (occupant side wall portion) 32D on both front and rear sides. A tuck 54 (F) is provided with a diameter-expanded portion 44D having a larger radius dimension r1 than (see FIG. 19), and is folded over the diameter-expanded portion 44D so as to correspond to the circular outer peripheral edge 32b of the driver side wall portion 32D. , B) are provided to form a contraction portion 48D, and the outer peripheral edge 43 of the base cloth 42D for the side wall portion of the vehicle body is the outer peripheral edge 23 of the side wall portion 22D of the disk shape.

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 contraction portion 48D by the tack 54 (F, B) has its outer peripheral edge 23 made to have the same dimensions as the outer peripheral edge 32b of the driver side wall portion 32D, and is stacked flat on 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。 Further, also in the airbag 20D of the fifth embodiment, the vehicle body side wall portion 22D is located around the inflow opening 24 from the receiving portion 34 to the outer peripheral edge 32b near the center of the driver side wall portion (occupant side wall portion) 32D. The diameter-expanded portion 44D having a radius dimension r1 larger than the dimension r0 up to is provided, and the margin of the film length (peripheral wall) of the diameter-expanded portion 44D having a diameter r1 larger than the driver side wall portion 32D (r1-r0 minutes). , The deployment height H1 of the driver side wall portion 32D can be largely secured. 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 contraction portion 48D by the tacks 54F and 54B, and is at the center when the expansion is completed. The planned receiving portion 34 in the vicinity can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide flat scheduled receiving 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 in the airbag 20D of the fifth embodiment, the deployment height H1 at the completion of expansion can be secured, and the driver (occupant) MD can be received by the wide flat 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, even in the airbag 20D of the fifth embodiment, the separation distance SL between the peripheral edge (mounting portion 25) of the inflow opening 24 of the vehicle body side wall portion 22D and the planned receiving portion 34 of the occupant side wall portion 32D when the expansion is completed is set. Tethers 37 and 37 that connect the mounting portion 25 on the periphery of the inflow opening 24 of the vehicle body side wall portion 22D and the receiving portion 34 of the occupant side wall portion 32D are arranged so as to be regulateable.

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, even in the fifth embodiment, the airbag 20D that has completed expansion has the attachment portion 25 on the peripheral edge of the inflow opening 24 of the planned receiving portion 34 by the tethers 37 and 37 while the deployment height H1 is secured. Since the separation distance SL from the vehicle body is regulated, a portion having a margin of film length (peripheral wall) due to the provision of 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 defined from the inner peripheral RI of the ring portion R at the peripheral edge of the storage portion 11 of the airbag 20D (the upper surface PR of the ring portion R and the spoke portion S) to the outer peripheral RO. , It can be brought into contact as an overhanging expansion portion 31D that sticks to the surface. As a result, in the airbag 20D of the fifth embodiment, the support by the portions RF and RB before and after the ring portion R on the peripheral edge of the storage portion 11 can be stabilized, and the driver (occupant) MD can be received. Further, the planned receiving portion 34 arranged near the center of the driver side wall portion 32D is arranged by the tethers 37 and 37 with a constant separation distance SL from the peripheral edge of the inflow opening 24, and is further flattened. The driver MD can be received by the receiving portion 34 of the flat portion 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。 Further, when the outer peripheral edges of the vehicle body side wall portion and the driver side wall portion (occupant side wall portion) are connected to each other, the contraction portion that can be connected (sewn) in a flatly deployed state is the sixth embodiment shown in FIGS. 22 to 24. For example, a contraction portion 48E provided with one tack 54F on the front side may be used as in the airbag 20E of the above.

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 side wall portion 22E of the vehicle body. That is, in the vehicle body side wall base cloth 42E forming the vehicle body side wall portion 22E, the disc-shaped occupant side wall base cloth 62E (shown in FIG. 19) forming the driver side wall portion (occupant side wall portion) 32E on the front side. A diameter-expanded portion 44E having a radius dimension r1 larger than the radius dimension r0 of the occupant side wall portion base cloth 62D) is provided, and expanded so as to correspond to the circular outer peripheral edge 32b of the driver side wall portion 32E. A contraction portion 48E formed by providing a folded tack 54F on the diameter portion 44E is formed, and the outer peripheral edge 43 of the base cloth 42E for the vehicle body side wall portion is used as the outer peripheral edge 23 of the disk-shaped vehicle body side wall portion 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, in the vehicle body side wall portion 22E provided with the contracted portion 48E by the tack 54F, the outer peripheral edge 23 thereof can be made to have the same dimensions as the outer peripheral edge 32b of the driver side wall portion 32E, stacked flat, and sewn to each other in a plane. 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。 Further, also in the airbag 20E of the sixth embodiment, the vehicle body side wall portion 22E is located around the inflow opening 24 from the expected receiving portion 34 to the outer peripheral edge 32b near the center of the driver side wall portion (occupant side wall portion) 32E. It is provided with a diameter-expanded 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-expanded portion 44E having a diameter r1 larger than the driver side wall portion 32E. , The deployment height H1 of the driver side wall portion 32E can be largely secured. 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 contraction portion 48E by the tack 54F, and is near the center when the expansion is completed. The scheduled receiving portion 34 can be maintained as flat as possible, and the driver (occupant) MD to be received can be received by the wide flat scheduled receiving portion 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。 Therefore, even in the airbag 20E of the sixth embodiment, the deployment height H1 at the completion of expansion can be secured, and the driver (occupant) MD can be received by the wide flat 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, even in the airbag 20E of the sixth embodiment, the separation distance SL between the peripheral edge (mounting portion 25) of the inflow opening 24 of the vehicle body side wall portion 22E when the expansion is completed and the planned receiving portion 34 of the occupant side wall portion 32D is set. Tethers 37 and 37 that connect the mounting portion 25 on the periphery of the inflow opening 24 of the vehicle body side wall portion 22E and the receiving portion 34 of the occupant side wall portion 32E are arranged so as to be regulateable.

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, even in the sixth embodiment, the airbag 20E that has completed the expansion has the attachment portion 25 at the peripheral edge of the inflow opening 24 of the planned 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 body is regulated, a portion having a margin of film length (peripheral wall) due to the provision of 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 peripheral edge 23 on the front side is defined from the inner peripheral RI of the ring portion R at the peripheral edge of the storage portion 11 of the airbag 20E (the upper surface PR of the ring portion R and the spoke portion S) to the outer peripheral RO. , It can be brought into contact as an overhanging expansion portion 31E that sticks. As a result, in the airbag 20E of the sixth embodiment, the support of the ring portion R by the front RF at the peripheral edge of the storage portion 11 can be stabilized and the driver (occupant) MD can be received. Of course, the planned receiving portion 34 arranged near the center of the driver side wall portion 32E is arranged by the tethers 37 and 37 with a constant separation distance SL from the peripheral edge of the inflow opening 24, and is further flattened. The driver MD can be received by the receiving portion 34 of the flat portion 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 that the unfolding height H1 at the completion of expansion can be secured, it is considered that good adhesion to the peripheral edge of the storage portion can be secured. The radial dimension r1 of the enlarged diameter portions 44, 44A, 44C, 44D, 44E is preferably about 1.2 to 1.6 times the radial dimension r0 of the corresponding occupant side wall portions 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 deployment height H1 is not sufficient, and if it exceeds 1.6 times, the volume on the side wall side of the vehicle body becomes too large, and the amount of protrusion from the peripheral edge of the storage portion increases. This is because the number increases, and it becomes difficult to obtain stable support from the peripheral edge 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 ... Body side wall, 23 ... Outer peripheral edge, 24 ... Inflow opening, 26 (F, B, L, R) ... Notch closing joint, 32, 32B, 32C, 32D, 32E ... (Passenger side wall) Driver side wall, 32b ... Outer peripheral edge, 34 ... Scheduled receiving part, 37 ... Tether, 42.42A, 42C, 42D, 42E ... Base cloth for side wall of vehicle body, 43 ... Outer peripheral edge, 44,44A, 44C, 44D, 44E ... Expanded part, 46 ... Notch, 46a ... Bottom, 46b ... Opposing edge, 48,48C, 48D, 48E ... Shrinkage site, 62, 62C, 62D, 62E ... Base cloth for occupant side wall, 63 ... Outer peripheral edge,
W ... (vehicle body side member) steering wheel, R ... ring part, r0 ... (occupant side wall part) dimensions, r1 ... (diameter expansion part) dimensions, SL ... (mounting part and expected receiving part) separation distance, MD … (Crew) driver.

Claims (2)

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、
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構成として、
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
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、配設されるとともに、
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、さらに、
膨張完了時の前記車体側壁部の外周縁の前後両側と左右両側とに、配設され、
膨張完了時に、前記切欠きの底部が、それぞれ、前記リング部の外方側に、配設される構成とし、
前記切欠き塞ぎ用結合部を設けた前記切欠きの底部付近の膨張完了形状が、それぞれ、前記底部を頂部とした略円錐状の突条部を設けて膨張する形状としていることを特徴とするエアバッグ。
It is configured to include 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 inflowing expansion gas near the center. An airbag in which an outer peripheral wall is formed by connecting the outer peripheral edges of the occupant side wall portion and the vehicle body side wall portion to each other.
The boss portion in the center of the ring portion gripped by the driver as a occupant on the steering wheel is folded and stored, and the receiving portion of the occupant side wall portion when inflated is arranged so as to receive the driver. As a configuration
The side wall of the car body
Assuming that the base cloth for the side wall of the vehicle body is flatly unfolded before being connected to the side wall of the occupant, the dimension from the inflow opening to the outer peripheral edge is measured from the vicinity of the center of the side wall of the occupant, which is flatly unfolded. It is configured to have an enlarged diameter portion that is larger than the dimension from the outer peripheral edge of the occupant side wall portion corresponding to the direction from the opening to the outer peripheral edge.
On the outer peripheral edge of the base cloth for the side wall portion of the vehicle body connected to the enlarged diameter portion, a contraction portion whose dimensions are adjusted so as to be coupled with the outer peripheral edge of the occupant side wall portion when the outer peripheral edge of the occupant side wall portion is connected is arranged. Te, coupled with the outer peripheral edge of the occupant side portion,
The contraction site is
The outer peripheral edge of the occupant side wall portion and the outer peripheral edge of the vehicle body side wall portion are arranged so as to be flatly overlapped and connectable.
A notch closure formed by mutually connecting both opposite edges in a substantially V-shaped notch provided on the outer peripheral edge of the base cloth for the side wall of the vehicle body which has been flattened before being connected to the side wall of the occupant. It is configured as a joint, and also
It is arranged on both the front and rear sides and the left and right sides of the outer peripheral edge of the side wall portion of the vehicle body when the expansion is completed.
When the expansion is completed, the bottoms of the notches are arranged on the outer side of the ring portion, respectively.
The feature is that the expansion completion shape near the bottom of the notch provided with the notch closing joint is formed to expand by providing a substantially conical ridge portion with the bottom as the top. Airbag to do.
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に記載のエアバッグ。 The peripheral edge of the inflow opening of the side wall of the vehicle body and the side wall of the occupant can be regulated so that the separation distance between the peripheral edge of the inflow opening of the side wall of the vehicle body and the planned receiving portion of the side wall of the occupant can be regulated. The airbag according to claim 1 , wherein a tether for connecting the portion to be received is provided.
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US11518335B2 (en) * 2019-07-02 2022-12-06 Joyson Safety Systems Acquisition Llc Driver side airbag module

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