JP6836187B2 - Folding storage for head protection airbags - Google Patents

Folding storage for head protection airbags Download PDF

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JP6836187B2
JP6836187B2 JP2017161667A JP2017161667A JP6836187B2 JP 6836187 B2 JP6836187 B2 JP 6836187B2 JP 2017161667 A JP2017161667 A JP 2017161667A JP 2017161667 A JP2017161667 A JP 2017161667A JP 6836187 B2 JP6836187 B2 JP 6836187B2
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airbag
folding
expansion
tension belt
compression
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正晃 奥原
正晃 奥原
林 信二
信二 林
飯田 崇
崇 飯田
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Toyoda Gosei Co Ltd
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Description

本発明は、内部に膨張用ガスを流入させて車両の窓の車内側を覆うように膨張可能な頭部保護エアバッグを、窓の上縁側に収納可能に、折り畳むとともに、テンションベルトを設けた端部側を、外形寸法を小さくするように圧縮した頭部保護エアバッグの折畳収納体に関する。 In the present invention, a head protection airbag that can be expanded so as to cover the inside of a vehicle window by inflowing expansion gas is folded so that it can be stored on the upper edge side of the window, and a tension belt is provided. The present invention relates to a folding storage body of a head protection airbag in which the end side is compressed so as to reduce the external dimensions.

従来、頭部保護エアバッグ装置の頭部保護エアバッグでは、フロントピラー部内の狭いスペースの部位に収納可能なように、渦巻状に折り畳んだ折畳体の中心に発生する空間部位を、押し潰すように圧縮した圧縮部を設けて、折畳収納体を形成する場合があった(例えば、特許文献1参照)。 Conventionally, in the head protection airbag of the head protection airbag device, the space part generated in the center of the spirally folded body is crushed so that it can be stored in a narrow space part in the front pillar part. In some cases, a folding storage body is formed by providing the compressed portion compressed as described above (see, for example, Patent Document 1).

また、他の頭部保護エアバッグの折畳収納体では、渦巻状に折り畳んだ折畳体を平らに押し潰す場合もあった(例えば、特許文献2参照)。 Further, in the folding storage body of another head protection airbag, the folding body folded in a spiral shape may be crushed flat (see, for example, Patent Document 2).

国際公開第2012/147490号International Publication No. 2012/147490 特表2013−514233号公報Japanese Patent Application Laid-Open No. 2013-514233

しかし、従来の折畳収納体では、頭部保護エアバッグが、膨張完了時の下縁側にテンションを確保可能に、端部側にテンションベルトを配設させて構成される場合があり、テンションベルトの配設部位を含んで圧縮部を形成しようとする際、圧縮前の折畳後において、テンションベルトの容積分、テンションベルトの配設部位が、前後方向で隣接する隣接部位より嵩張り、隣接部位の圧縮を妨げてしまい、長さ方向に沿って均等な小さな厚さ寸法の圧縮部を得られず、狭い収納スペースに圧縮部を収納できなくなる課題を生じさせていた。 However, in the conventional folding storage body, the head protection airbag may be configured by arranging a tension belt on the end side so that tension can be secured on the lower edge side when the expansion is completed. When trying to form a compression portion including the arrangement portion of the tension belt, the arrangement portion of the tension belt is bulkier than the adjacent portion adjacent in the front-rear direction by the volume of the tension belt and adjacent to each other after folding before compression. It hinders the compression of the part, and it is not possible to obtain a compressed portion having a small thickness dimension that is uniform along the length direction, which causes a problem that the compressed portion cannot be stored in a narrow storage space.

本発明は、上述の課題を解決するものであり、テンションベルトの配設部位を含んで圧縮した圧縮部を、長さ方向に沿って均等な厚さ寸法として構成できて、狭い収納部位でも容易に収納可能な頭部保護エアバッグの折畳収納体を提供することを目的とする。 The present invention solves the above-mentioned problems, and the compressed portion including the arrangement portion of the tension belt can be configured as an even thickness dimension along the length direction, and it is easy even in a narrow storage portion. It is an object of the present invention to provide a folding storage body for a head protection airbag that can be stored in a.

本発明に係る頭部保護エアバッグの折畳収納体は、膨張用ガスの流入時に、収納された車両の窓の上縁側から前記窓を覆うように下方へ展開膨張するとともに、膨張完了時の前後方向の端部側に、前後方向に沿うテンションを確保可能に、前後方向に沿うように延びて、前記窓の周縁の車両のピラー部に連結されるテンションベルト、を備えた頭部保護エアバッグを、
平らに展開した下縁側を上縁側に接近させるように前後方向に沿った棒状に折り畳んだ後、前記テンションベルトの配設部位と該配設部位に前後方向に沿って隣接する隣接部位とを含めた端部側に、外形寸法を狭めるように圧縮させた圧縮部を設けて、前記窓の上縁側に収納する頭部保護エアバッグの折畳収納体であって、
前記圧縮部を形成するように圧縮される前記テンションベルトの配設部位と前記隣接部位との少なくともに一方に、厚さ寸法を調整する厚さ調整手段が設定され、
該厚さ調整手段により、前記テンションベルトの配設部位と前記隣接部位とが、圧縮前の折畳後の厚さ寸法を、前後方向に沿って略均一となるように、設定されていることを特徴とする。
When the expansion gas flows in, the folding storage body of the head protection airbag according to the present invention expands and expands downward from the upper edge side of the window of the stored vehicle so as to cover the window, and when the expansion is completed. Head protection air provided on the end side in the front-rear direction with a tension belt extending along the front-rear direction and connected to the pillar portion of the vehicle on the periphery of the window so as to secure tension along the front-rear direction. Bag,
After folding the flatly developed lower edge side into a rod shape along the front-rear direction so as to approach the upper edge side, the tension belt disposition portion and the adjacent portion adjacent to the disposition portion along the front-rear direction are included. It is a folding storage body of a head protection airbag that is provided on the end side with a compression part compressed so as to narrow the external dimensions and is stored on the upper edge side of the window.
A thickness adjusting means for adjusting the thickness dimension is set on at least one of the arrangement portion and the adjacent portion of the tension belt that is compressed so as to form the compression portion.
By the thickness adjusting means, the arrangement portion of the tension belt and the adjacent portion are set so that the thickness dimension after folding before compression is substantially uniform along the front-rear direction. It is characterized by.

本発明に係る頭部保護エアバッグの折畳収納体では、テンションベルトの配設部位とこの配設部位に前後方向に沿って隣接する隣接部位とが、厚さ調整手段により、圧縮前の折畳後の厚さ寸法を、前後方向に沿って略均一となるように、構成されることから、圧縮部を形成する際の押し板等を、折畳後の圧縮予定領域に均等に押し付けることができて、圧縮部を、前後方向の長さ方向に沿って、均等な小さな厚さ寸法として、形成できる。 In the folding storage body of the head protection airbag according to the present invention, the arrangement portion of the tension belt and the adjacent portion adjacent to the arrangement portion along the front-rear direction are folded before compression by the thickness adjusting means. Since the thickness dimension after folding is configured to be substantially uniform along the front-rear direction, the pressing plate or the like when forming the compression portion is evenly pressed against the area to be compressed after folding. The compressed portion can be formed as a uniform small thickness dimension along the length direction in the front-rear direction.

したがって、本発明に係る頭部保護エアバッグの折畳収納体では、テンションベルトの配設部位を含んで圧縮した圧縮部を、長さ方向に沿って均等な厚さ寸法として構成できて、狭い収納部位でも容易に収納することができる。 Therefore, in the folding storage body of the head protection airbag according to the present invention, the compressed portion including the arrangement portion of the tension belt can be configured as a uniform thickness dimension along the length direction, and is narrow. It can be easily stored even in the storage area.

厚さ調整手段としては、隣接部位に配設されるエアバッグ用基布の使用量より、テンションベルトの配設部位に配設されるエアバッグ用基布の使用量を少なくして、調整する構成とすることが例示できる。 As the thickness adjusting means, the amount of the airbag base cloth disposed in the tension belt arrangement portion is smaller than the usage amount of the airbag base fabric disposed in the adjacent portion, and the thickness is adjusted. The configuration can be exemplified.

あるいは、厚さ調整手段としては、隣接部位に配設されるエアバッグ用基布の繊度(糸の太さ)より、テンションベルトの配設部位に配設されるエアバッグ用基布の繊度を細くして、調整する構成とすることが例示できる。 Alternatively, as the thickness adjusting means, the fineness of the airbag base cloth disposed at the tension belt placement portion is adjusted from the fineness (thread thickness) of the airbag base fabric disposed at the adjacent portion. It can be exemplified that the structure is made thin and adjusted.

さらには、厚さ調整手段としては、隣接部位に配設されるエアバッグ用基布に塗布するガス非透過性を確保したり耐熱性を確保するためのコーティング剤のコート量より、テンションベルトの配設部位に配設されるエアバッグ用基布に塗布するコート量を少なくして、調整する構成とすることもできる。 Further, as a thickness adjusting means, the tension belt is more than the coating amount of the coating agent for ensuring gas impermeableness or heat resistance to be applied to the airbag base cloth arranged in the adjacent portion. It is also possible to adjust by reducing the amount of coating applied to the airbag base cloth disposed at the arrangement site.

本発明の一実施形態である頭部保護エアバッグの折畳収納体を使用した頭部保護エアバッグ装置を車内側から見た概略正面図である。It is a schematic front view of the head protection airbag device using the folding storage body of the head protection airbag which is one Embodiment of this invention as seen from the inside of a vehicle. 実施形態の折畳収納体を構成する頭部保護エアバッグを平らに展開した状態の正面図である。It is a front view of the state in which the head protection airbag constituting the folding storage body of an embodiment is flatly unfolded. 実施形態の頭部保護エアバッグの膨張時の概略横断面図であり、図2のIII−III部位に対応する。It is a schematic cross-sectional view of the head protection airbag of the embodiment at the time of expansion, and corresponds to the part III-III of FIG. 実施形態のエアバッグの折り畳み工程を説明する概略図である。It is the schematic explaining the folding process of the airbag of an embodiment. 実施形態のエアバッグをロール折りして折り畳む際における巻き芯に、エアバッグを巻き付ける状態を説明する概略図である。It is a schematic diagram explaining the state which winds an airbag around a winding core at the time of roll folding and folding an airbag of an embodiment. ロール折りしたエアバッグから巻き芯を外す状態を説明する概略図である。It is the schematic explaining the state which removes a winding core from a roll-folded airbag. 実施形態の折畳収納体の圧縮部を形成する工程を説明する概略図である。It is the schematic explaining the process of forming the compression part of the folding storage body of embodiment. 実施形態のエアバッグを折り畳んで折畳収納体を形成した後、カバー材や折り崩れ防止材を巻き付ける状態を示す図である。It is a figure which shows the state in which the cover material and the collapse prevention material are wound after the airbag of an embodiment is folded to form a folding storage body. 実施形態の折畳収納体を使用した頭部保護エアバッグ装置の作動時を順に説明する車内側から見た概略正面図である。It is a schematic front view seen from the inside of the vehicle which sequentially explains the operation time of the head protection airbag device using the folding storage body of embodiment. 実施形態の折畳収納体を使用した頭部保護エアバッグ装置の作動時を順に説明する概略断面図であり、一次展開エリア(非圧縮部)の部位を示す。It is the schematic sectional drawing explaining the operation time of the head protection airbag device using the folding storage body of embodiment in order, and shows the part of the primary development area (non-compression part). 実施形態の折畳収納体を使用した頭部保護エアバッグ装置の作動時を順に説明する概略断面図であり、二次展開エリア(圧縮部)の部位を示す。It is the schematic sectional drawing explaining the operation time of the head protection airbag device using the folding storage body of embodiment in order, and shows the part of the secondary development area (compression part). 実施形態の変形例の折畳収納体に使用するエアバッグを、平らに展開した状態の正面図である。It is a front view of the state in which the airbag used for the folding storage body of the modification of the embodiment is flatly unfolded. 図12に示すエアバッグを折り畳んで折畳収納体を形成した後、カバー材や折り崩れ防止材を巻き付ける状態を示す図である。It is a figure which shows the state which the cover material and the collapse prevention material are wound after folding the airbag shown in FIG. 12 to form a folding storage body. 実施形態の他の変形例の折畳収納体に使用するエアバッグを、平らに展開した状態の正面図である。It is a front view of the state in which the airbag used for the folding storage body of another modification of the embodiment is flatly unfolded. 図14に示すエアバッグを折り畳んで折畳収納体を形成した後、カバー材や折り崩れ防止材を巻き付ける状態を示す図である。It is a figure which shows the state which the cover material and the collapse prevention material are wound after folding the airbag shown in FIG. 14 to form a folding storage body. 実施形態のさらに他の変形例のエアバッグを折り畳んで折畳収納体を形成する工程を説明する図である。It is a figure explaining the step of folding the airbag of still another modification of the embodiment to form a folding storage body.

以下、本発明の一実施形態を図面に基づいて説明すると、実施形態の頭部保護エアバッグ20(以下、適宜、エアバッグと略す)の折畳収納体70は、図1に示す頭部保護エアバッグ装置Mに使用される。頭部保護エアバッグ装置Mは、図1に示すように、エアバッグ20と、インフレーター14と、取付ブラケット11,16と、エアバッグカバー9と、を備えて構成される。エアバッグ20は、折畳収納体70として、図1に示すように、車両Vの車内側における窓W1,W2の上縁側において、フロントピラー部FPの下縁4a側から、ルーフサイドレール部RRの下縁5a側を経て、リヤピラー部RPの上方の領域まで、収納されている。なお、実施形態では、エアバッグ20は、車両Vの側面衝突時、若しくは、ロールオーバー時に、乗員の頭部を保護可能に構成されている。また、車両Vは、前席と後席との側方に、それぞれ、窓W1,W2を配設させて構成されている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The foldable storage body 70 of the head protection airbag 20 (hereinafter, appropriately abbreviated as an airbag) of the embodiment has the head protection shown in FIG. Used for airbag device M. As shown in FIG. 1, the head protection airbag device M includes an airbag 20, an inflator 14, mounting brackets 11 and 16, and an airbag cover 9. As shown in FIG. 1, the airbag 20 is a folding storage body 70, and is provided on the upper edge side of the windows W1 and W2 inside the vehicle V from the lower edge 4a side of the front pillar portion FP to the roof side rail portion RR. It is stored up to the area above the rear pillar portion RP via the lower edge 5a side. In the embodiment, the airbag 20 is configured to be able to protect the head of the occupant at the time of a side collision or rollover of the vehicle V. Further, the vehicle V is configured by arranging windows W1 and W2 on the sides of the front seat and the rear seat, respectively.

エアバッグカバー9は、フロントピラー部FPに配置されるフロントピラーガーニッシュ4と、ルーフサイドレール部RRに配置されるルーフヘッドライニング5と、のそれぞれの下縁4a,5aから、構成されている。フロントピラーガーニッシュ4とルーフヘッドライニング5とは、合成樹脂製として、それぞれ、ボディ(車体)1側のインナパネル2における車内側に、取付固定されている。また、エアバッグカバー9は、図10,11に示すように、折り畳まれて収納されるエアバッグ20(折畳収納体70)の車内側Iを覆うように配設されて、展開膨張時のエアバッグ20に押されて車内側Iに開き可能に、配設されている。 The airbag cover 9 is composed of lower edges 4a and 5a of a front pillar garnish 4 arranged on the front pillar portion FP and a roof head lining 5 arranged on the roof side rail portion RR, respectively. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin and are mounted and fixed to the inside of the inner panel 2 on the body (body) 1 side, respectively. Further, as shown in FIGS. 10 and 11, the airbag cover 9 is arranged so as to cover the inside I of the airbag 20 (folded storage body 70) to be folded and stored, and is arranged at the time of expansion and expansion. It is arranged so that it can be opened to the inside I of the vehicle by being pushed by the airbag 20.

インフレーター14は、エアバッグ20に膨張用ガスを供給するもので、略円柱状のシリンダタイプとして、先端側に、膨張用ガスを吐出可能な図示しないガス吐出口を、配設させている。インフレーター14は、ガス吐出口付近を含めた先端側を、エアバッグ20の後述する流入口部23に挿入させ、流入口部23の外周側に配置されるクランプ15を用いて、エアバッグ20に対して接続されている。また、インフレーター14は、インフレーター14を保持する取付ブラケット16と、取付ブラケット16をボディ1側のインナパネル2に固定するためのボルト17と、を利用して、インナパネル2における窓W2の上方となる位置に、取り付けられている(図1参照)。インフレーター14は、図示しないリード線を介して、車両Vの図示しない制御装置と電気的に接続されており、制御装置が、車両Vの側面衝突やロールオーバーを検知した際に、制御装置からの作動信号を入力させて、作動するように構成されている。 The inflator 14 supplies an expansion gas to the airbag 20. The inflator 14 is a substantially cylindrical cylinder type, and has a gas discharge port (not shown) capable of discharging the expansion gas on the tip side thereof. The inflator 14 inserts the tip side including the vicinity of the gas discharge port into the inflow port portion 23 described later of the airbag 20, and uses a clamp 15 arranged on the outer peripheral side of the inflow port portion 23 to make the airbag 20. Is connected to. Further, the inflator 14 uses a mounting bracket 16 for holding the inflator 14 and a bolt 17 for fixing the mounting bracket 16 to the inner panel 2 on the body 1 side to be above the window W2 in the inner panel 2. It is attached to the position (see FIG. 1). The inflator 14 is electrically connected to a control device (not shown) of the vehicle V via a lead wire (not shown), and when the control device detects a side collision or rollover of the vehicle V, the inflator 14 is released from the control device. It is configured to operate by inputting an operation signal.

各取付ブラケット11は、2枚の板金製のプレートから構成されるもので、エアバッグ20の後述する各取付部44,56を、表裏から挟むようにして、各取付部44,56に取り付けられ、ボルト12を利用して、各取付部44,56を、ボディ1側のインナパネル2に取付固定している(図1,2,10参照)。 Each mounting bracket 11 is composed of two sheet metal plates, and is attached to each mounting portion 44, 56 so as to sandwich the mounting portions 44, 56 described later of the airbag 20 from the front and back, and bolts. 12 is used to mount and fix the mounting portions 44 and 56 to the inner panel 2 on the body 1 side (see FIGS. 1, 2 and 10).

エアバッグ20は、図1の二点鎖線や図2,9に示すように、インフレーター14からの膨張用ガスを内部に流入させて、折畳状態から展開して、窓W1,W2や、センターピラー部CP及びリヤピラー部RPのピラーガーニッシュ6,7の車内側を覆うように展開膨張する。具体的には、エアバッグ20は、膨張完了時の外形形状を、窓W1からセンターピラー部CP,窓W2を経て、リヤピラー部RPの前側にかけての車内側を覆い可能に、長手方向を前後方向に略沿わせた略長方形板状とし、実施形態の場合、図1,9に示すように、膨張完了時の下縁21bを、窓W1,W2の下縁から構成されるベルトラインBLより下方に位置させるように、構成されている。エアバッグ20は、実施形態の場合、図2に示すように、バッグ本体21と、バッグ本体21の流入口部23内に配設されるインナチューブ53と、バッグ本体21の前端21c側に配設されるテンションベルト55と、を備えて構成されている。 As shown in the alternate long and short dash line in FIG. 1 and FIGS. 2 and 9, the airbag 20 is expanded from the folded state by allowing the expansion gas from the inflator 14 to flow into the inside, and the windows W1 and W2 and the center. It expands and expands so as to cover the inside of the pillar garnishes 6 and 7 of the pillar portion CP and the rear pillar portion RP. Specifically, the airbag 20 can cover the inside of the vehicle from the window W1 through the center pillar portion CP and the window W2 to the front side of the rear pillar portion RP so that the outer shape of the airbag 20 can be covered in the longitudinal direction in the front-rear direction. In the case of the embodiment, the lower edge 21b at the completion of expansion is below the belt line BL composed of the lower edges of the windows W1 and W2, as shown in FIGS. It is configured to be located in. In the case of the embodiment, the airbag 20 is arranged on the bag main body 21, the inner tube 53 arranged in the inflow port portion 23 of the bag main body 21, and the front end 21c side of the bag main body 21, as shown in FIG. It is configured to include a tension belt 55 to be installed.

バッグ本体21を構成するエアバッグ用基布58は、図2,3に示すように、実施形態の場合、ポリアミド糸やポリエステル糸等を使用した袋織りによって、一体的に製造されている。さらに、バッグ本体21は、膨張完了時に車内側Iに位置する車内側壁部22aと車外側Oに位置する車外側壁部22bとを離隔させるように内部に膨張用ガスGを流入させて膨張するガス流入部22(図3,10参照)と、膨張用ガスGを流入させない非流入部(閉じ部)41と、を備えている。 As shown in FIGS. 2 and 3, the airbag base cloth 58 constituting the bag body 21 is integrally manufactured by bag weaving using polyamide yarn, polyester yarn, or the like in the case of the embodiment. Further, the bag body 21 expands by inflowing an expansion gas G into the inside so as to separate the vehicle inner side wall portion 22a located on the vehicle inner side I and the vehicle outer wall portion 22b located on the vehicle outer side O when the expansion is completed. It includes a gas inflow section 22 (see FIGS. 3 and 10) and a non-inflow section (closed section) 41 that does not allow the expansion gas G to flow in.

ガス流入部22は、窓W1,W2の車内側を覆うように膨張する遮蔽膨張部24と、遮蔽膨張部24に膨張用ガスを供給するようにインフレーター14と接続される円筒状の流入口部23と、を備えて構成される。流入口部23は、バッグ本体21の上縁21a側における前後方向の中央付近に配設され、内部に、耐熱性を向上させるインナチューブ53を配設させている。流入口部23は、後端側の開口23aからインフレーター14を挿入させた状態で、外周側にクランプ15を嵌めることにより、インフレーター14と接続される。 The gas inflow portion 22 is a shielding expansion portion 24 that expands so as to cover the inside of the windows W1 and W2, and a cylindrical inflow port portion that is connected to an inflator 14 so as to supply expansion gas to the shielding expansion portion 24. 23 and. The inflow port portion 23 is arranged near the center in the front-rear direction on the upper edge 21a side of the bag main body 21, and an inner tube 53 for improving heat resistance is arranged inside. The inflow port portion 23 is connected to the inflator 14 by fitting the clamp 15 on the outer peripheral side in a state where the inflator 14 is inserted from the opening 23a on the rear end side.

遮蔽膨張部24は、前後方向に沿って並設される複数(実施形態では2個)の膨張本体部31,35と、遮蔽膨張部24の上縁側における膨張本体部31,35の上方に配置されるガス案内流路29と、を備えて構成されている。ガス案内流路29は、流入口部23と連通されるとともに、流入口部23から流入された膨張用ガスGを前後の膨張本体部31,35に案内可能に配設されている。 The shielding expansion portions 24 are arranged above the plurality of expansion main portions 31 and 35 (two in the embodiment) arranged side by side in the front-rear direction and the expansion main portions 31 and 35 on the upper edge side of the shielding expansion portion 24. It is configured to include a gas guide flow path 29 to be formed. The gas guide flow path 29 is communicated with the inflow port portion 23, and is arranged so that the expansion gas G flowing in from the inflow port portion 23 can be guided to the front and rear expansion main bodies 31 and 35.

前側の膨張本体部31は、前席に着座した乗員の頭部の側方における窓W1の部位の車内側を覆う前保護膨張部32と、前保護膨張部32の後部側で膨張する補助膨張部33と、を備えて構成されている。前保護膨張部32は、ガス案内流路29の前端側の供給口31aから膨張用ガスGを流入させて膨張し、補助膨張部33は、前端側の連通口33aにより、前保護膨張部32と連通されており、連通口33aを通る前保護膨張部32からの膨張用ガスGを流入させて、膨張する。 The front expansion main body 31 includes a front protective expansion 32 that covers the inside of the vehicle at the portion of the window W1 on the side of the head of the occupant seated in the front seat, and an auxiliary expansion that expands on the rear side of the front protective expansion 32. It is configured to include a unit 33. The front protective expansion portion 32 expands by inflowing the expansion gas G from the supply port 31a on the front end side of the gas guide flow path 29, and the auxiliary expansion portion 33 expands by the communication port 33a on the front end side. The expansion gas G from the front protective expansion portion 32 passing through the communication port 33a is allowed to flow in to expand.

後側の膨張本体部35は、後席に着座した乗員の頭部の側方における窓W2の部位の車内側を覆う後保護膨張部36と、後保護膨張部36の前下側で膨張する補助膨張部37と、を備えて構成されている。後保護膨張部36は、ガス案内流路29の後端側の供給口35aから膨張用ガスGを流入させて、膨張し、補助膨張部37は、後端側の連通口37aにより、後保護膨張部36と連通されており、連通口37aを通る後保護膨張部36からの膨張用ガスGを流入させて、膨張する。 The rear expansion main body 35 expands at the rear protection expansion portion 36 that covers the inside of the vehicle at the portion of the window W2 on the side of the head of the occupant seated in the rear seat and the front lower side of the rear protection expansion portion 36. It is configured to include an auxiliary expansion portion 37. The rear protection expansion portion 36 expands by inflowing the expansion gas G from the supply port 35a on the rear end side of the gas guide flow path 29, and the auxiliary expansion portion 37 is rear-protected by the communication port 37a on the rear end side. It communicates with the expansion portion 36, and after passing through the communication port 37a, the expansion gas G from the protection expansion portion 36 flows in to expand.

なお、補助膨張部33,37は、前保護膨張部32や後保護膨張部36の調圧室としての役目を果たし、乗員頭部を受け止めた際の前保護膨張部32や後保護膨張部36の急激な内圧上昇時に、前保護膨張部32や後保護膨張部36から膨張用ガスGを流入させて、急激な内圧上昇を抑制できるように配設されている。 The auxiliary expansion portions 33 and 37 serve as pressure regulating chambers for the front protection expansion portion 32 and the rear protection expansion portion 36, and the front protection expansion portion 32 and the rear protection expansion portion 36 when the occupant's head is received. When the internal pressure rises sharply, the expansion gas G is allowed to flow in from the front protection expansion portion 32 and the rear protection expansion portion 36, so that the sudden rise in internal pressure can be suppressed.

また、遮蔽膨張部24の前端側には、後述する区画部(端側区画部)51により、前保護膨張部32と区画された端側膨張部39が配設されている。端側膨張部39の上部側には、区画部51の上端51aと後述する周縁部42の上縁42aとの間に配設される流入口39aが、配設されて、端側膨張部39は、膨張本体部31の前保護膨張部32からの膨張用ガスGを流入口39aから流入させて、膨張する。この端側膨張部39は、車両Vがオフセット衝突等して、前席の乗員が車外側Oの斜め前方に移動する際に、その乗員の頭部を受け止めて保護できるように、配設されている。 Further, on the front end side of the shielding expansion portion 24, an end side expansion portion 39 partitioned from the front protection expansion portion 32 is arranged by a partition portion (end side partition portion) 51 described later. On the upper side of the end-side expansion portion 39, an inflow port 39a disposed between the upper end 51a of the partition portion 51 and the upper edge 42a of the peripheral edge portion 42 described later is arranged, and the end-side expansion portion 39 is provided. Inflows the expansion gas G from the front protective expansion portion 32 of the expansion main body portion 31 from the inflow port 39a and expands. The end-side expansion portion 39 is arranged so that when the vehicle V collides with an offset or the like and the occupant in the front seat moves diagonally forward of the outside O of the vehicle, the head of the occupant can be received and protected. ing.

さらに、実施形態の場合、端側膨張部39は、図2,3に示すように、エアバッグ20の膨張完了時に、車外側Oにテンションベルト55が配設されて、ベルト配設部位68の一部を構成し、圧縮部74を形成する際に、テンションベルト55とともに圧縮される。 Further, in the case of the embodiment, as shown in FIGS. 2 and 3, in the end side expansion portion 39, when the expansion of the airbag 20 is completed, the tension belt 55 is arranged on the outside O of the vehicle, and the belt arrangement portion 68 When a part is formed and the compression portion 74 is formed, the compression is performed together with the tension belt 55.

なお、圧縮部74を形成する部位は、実施形態の場合、フロントピラー部FP内に収納される部位であって、後述する前端側の取付部44(F)の前側近傍の起点PS(図2,8参照)からエアバッグ20の前方側の領域とし、起点PSより前方が、圧縮予定領域67となる。この圧縮予定領域67は、前保護膨張部32の前端部32a、車外側Oにテンションベルト55の配設される端側膨張部39、それらの周囲に配置される非流入部(閉じ部)41の部位(前側部42d)、及び、テンションベルト55自体の領域、となる。 In the case of the embodiment, the portion forming the compression portion 74 is a portion housed in the front pillar portion FP, and is a starting point PS near the front side of the front end side mounting portion 44 (F) described later (FIG. 2). , 8) to the area on the front side of the airbag 20, and the area in front of the starting point PS is the planned compression area 67. The planned compression region 67 includes a front end portion 32a of the front protective expansion portion 32, an end side expansion portion 39 in which a tension belt 55 is arranged on the outside O of the vehicle, and a non-inflow portion (closed portion) 41 arranged around them. (Front side portion 42d) and the region of the tension belt 55 itself.

また、実施形態の場合、前保護膨張部32の前端部32aは、テンションベルト55の略容積分のエアバッグ用基布58を配設するために、端側膨張部39や前保護膨張部32における前端部32aの後方側の一般部32cより下方へ延びた下方延設部32bを備えて、構成されている。 Further, in the case of the embodiment, the front end portion 32a of the front protective expansion portion 32 is arranged with the end side expansion portion 39 and the front protection expansion portion 32 in order to dispose the airbag base cloth 58 for a substantially volume of the tension belt 55. A lower extension portion 32b extending downward from the general portion 32c on the rear side of the front end portion 32a in the above is provided.

さらに、実施形態の場合には、エアバッグ20内への膨張用ガスGの流入時に、展開方向を安定させて窓W1,W2を迅速に覆えるように、圧縮予定領域67の部位を除いたガス案内流路29と膨張本体部31,35とを、一次展開エリア26として設定し、そして、圧縮されることによって遅れて展開膨張する圧縮予定領域67の部位を、二次展開エリア27として、設定している。 Further, in the case of the embodiment, the portion of the planned compression region 67 is removed so that the expansion direction is stabilized and the windows W1 and W2 can be quickly covered when the expansion gas G flows into the airbag 20. The gas guide flow path 29 and the expansion main bodies 31 and 35 are set as the primary expansion area 26, and the portion of the planned compression region 67 that expands and expands later due to compression is set as the secondary expansion area 27. It is set.

非流入部41は、ガス流入部22の外周縁を構成する周縁部42と、取付部44と、ガス流入部22の領域内に配置されて膨張部位を区画する区画部47,48,49,51と、を備えて構成されている。 The non-inflow portion 41 is arranged in the region of the peripheral portion 42, the attachment portion 44, and the gas inflow portion 22 which form the outer peripheral edge of the gas inflow portion 22, and is arranged in the region of the gas inflow portion 22 to partition the expansion portion 47, 48, 49, It is configured to include 51.

周縁部42は、流入口部23の後端側の開口23aを除いて、ガス流入部22の周囲を全周にわたって囲むように、配置されている。取付部44は、バッグ本体21の上縁21a側をボディ1側のインナパネル2に取り付けるための部位であり、バッグ本体21の上縁21a側となる周縁部42の上縁42aから上方に突出するように、袋織りのエアバッグ用基布58と別体の布材(織布)を取り付けられて、前後方向に沿って複数配置されている。実施形態の場合、取付部44は、流入口部23の前側に、前端側の取付部44Fを含めて、2個とし、流入口部23の後側に2個として、計4個、配置されている。各取付部44には、取付ボルト12を挿通可能な取付孔44aが、配設されている。 The peripheral edge portion 42 is arranged so as to surround the periphery of the gas inflow portion 22 over the entire circumference except for the opening 23a on the rear end side of the inflow port portion 23. The attachment portion 44 is a portion for attaching the upper edge 21a side of the bag body 21 to the inner panel 2 on the body 1 side, and projects upward from the upper edge 42a of the peripheral edge portion 42 on the upper edge 21a side of the bag body 21. As such, a bag-woven air bag base cloth 58 and a separate cloth material (woven cloth) are attached, and a plurality of cloth materials (woven cloths) are arranged along the front-rear direction. In the case of the embodiment, a total of four mounting portions 44 are arranged on the front side of the inflow port portion 23, including the mounting portion 44F on the front end side, and two on the rear side of the inflow port portion 23. ing. Each mounting portion 44 is provided with mounting holes 44a through which mounting bolts 12 can be inserted.

区画部47は、周縁部42の下縁42bにおける前後方向の中央付近から湾曲して上方へ延びるように配設される縦棒部47aと、縦棒部47aの上端で前方に延びる横棒部47bと、を備えた中央区画部47を構成している。縦棒部47aは、前側の膨張本体部31の補助膨張部33と、後側の膨張本体部35(補助膨張部37,後保護膨張部36)とを区画するものであり、横棒部47bは、ガス案内流路29の下縁側を形成するものであり、補助膨張部33とガス案内流路29とを区画している。 The compartments 47 are a vertical bar portion 47a arranged so as to be curved and extend upward from the vicinity of the center in the front-rear direction on the lower edge 42b of the peripheral edge portion 42, and a horizontal bar portion extending forward at the upper end of the vertical bar portion 47a. It constitutes a central compartment 47 provided with 47b. The vertical bar portion 47a partitions the auxiliary expansion portion 33 of the front expansion main body portion 31 and the rear expansion main body portion 35 (auxiliary expansion portion 37, rear protection expansion portion 36), and the horizontal bar portion 47b. Formes the lower edge side of the gas guide flow path 29, and partitions the auxiliary expansion portion 33 and the gas guide flow path 29.

区画部48は、連通口33aの下縁側を形成するものであり、周縁部42の下縁42bから上方に延びて、前保護膨張部32と補助膨張部33とを区画する前下区画部48を構成している。区画部49は、連通口37aの下縁側を形成するものであり、周縁部42の下縁42bから上方に延びて、補助膨張部37と後保護膨張部36とを区画する後下区画部49を構成している。 The compartment 48 forms the lower edge side of the communication port 33a and extends upward from the lower edge 42b of the peripheral edge 42 to partition the front protective expansion portion 32 and the auxiliary expansion portion 33. Consists of. The partition portion 49 forms the lower edge side of the communication port 37a, extends upward from the lower edge 42b of the peripheral edge portion 42, and partitions the auxiliary expansion portion 37 and the rear protection expansion portion 36. Consists of.

区画部51は、端側膨張部39と前保護膨張部32とを区画する端側区画部51を構成しており、周縁部42の下縁42bの前部側から上方に延びるように、配設されている。そして、上端51aは、周縁部42の上縁42a側まで到達せずに、周縁部42の上縁42aとの間に、端側膨張部39に膨張用ガスGを流入させる流入口39aを設けるように、配設されている。 The compartment 51 constitutes an end-side compartment 51 that partitions the end-side expansion portion 39 and the front protection expansion portion 32, and is arranged so as to extend upward from the front side of the lower edge 42b of the peripheral edge portion 42. It is installed. Then, the upper end 51a does not reach the upper edge 42a side of the peripheral edge portion 42, and an inflow port 39a for allowing the expansion gas G to flow into the end side expansion portion 39 is provided between the upper end portion 51a and the upper edge 42a of the peripheral edge portion 42. As such, it is arranged.

テンションベルト55は、バッグ本体21と別体とされて、可撓性を有したシート材から構成されており、実施形態の場合、ポリアミド糸やポリエステル糸等からなる織布から形成されている。テンションベルト55は、元部55b側を、バッグ本体21に結合させ、先端55a側を、バッグ本体21の前端21cから離れた窓W1の周縁における車両Vのボディ1側、実施形態の場合、フロントピラー部FPの部位におけるボディ1側のインナパネル2に、取付固定させている。このテンションベルト55は、膨張完了時のバッグ本体21が受け止める乗員の車外側Oへの移動を抑制可能なように、バッグ本体21の下縁21b側に前後方向に沿うテンションを発生させるものである。さらに実施形態の場合、テンションベルト55は、膨張完了時の端側膨張部39の車外側Oに配置されて、元部55b側を、縫合糸を用いて、端側区画部51の車外側Oの部位に縫着(結合)させている。テンションベルト55の先端55a側には、取付部56が、配設されている。この取付部56は、バッグ本体21に形成される取付部44と同様に、取付ブラケット11と取付ボルト12とを利用して、インナパネル2に取り付けられる部位であり、取付ボルト12を挿通可能な取付孔56aを、備えている。 The tension belt 55 is separated from the bag main body 21 and is made of a flexible sheet material. In the case of the embodiment, the tension belt 55 is made of a woven fabric made of a polyamide thread, a polyester thread, or the like. In the tension belt 55, the base portion 55b side is coupled to the bag body 21, and the tip 55a side is the body 1 side of the vehicle V on the peripheral edge of the window W1 away from the front end 21c of the bag body 21, in the case of the embodiment, the front. It is attached and fixed to the inner panel 2 on the body 1 side at the part of the pillar portion FP. The tension belt 55 generates tension along the front-rear direction on the lower edge 21b side of the bag body 21 so that the bag body 21 can suppress the movement of the occupant to the outside O of the vehicle when the expansion is completed. .. Further, in the case of the embodiment, the tension belt 55 is arranged on the vehicle outer side O of the end side expansion portion 39 when the expansion is completed, and the original portion 55b side is set on the vehicle outer side O of the end side partition portion 51 by using a suture. It is sewn (bonded) to the part of. A mounting portion 56 is arranged on the tip 55a side of the tension belt 55. Similar to the mounting portion 44 formed on the bag body 21, the mounting portion 56 is a portion to be mounted on the inner panel 2 by using the mounting bracket 11 and the mounting bolt 12, and the mounting bolt 12 can be inserted therethrough. It is provided with a mounting hole 56a.

そして、実施形態の場合、テンションベルト55を含めたバッグ本体21の前端21c側の端側膨張部39、前保護膨張部32における下方延設部32bを備えた前端部32a、及び、非流入部41における端側区画部51や周縁部42を含めた起点PSより前方側の前側部42dのエリア(二次展開エリア27であり圧縮予定領域67である)を圧縮部74として、他の部位のガス案内流路29や膨張本体部31,35の部位を非圧縮部71として、折畳収納体70を形成している。なお、圧縮部74のエリアは、折畳収納体70の前端部70a、すなわち、エアバッグ20の前端21c側として、図1に示すように、狭い収納スペースのフロントピラー部FPのフロントピラーガーニッシュ4と前端側のルーフヘッドライニング5とに覆われる部位に、収納される構成としている。 Then, in the case of the embodiment, the end side expansion portion 39 on the front end 21c side of the bag body 21 including the tension belt 55, the front end portion 32a provided with the downward extension portion 32b in the front protection expansion portion 32, and the non-inflow portion. The area of the front side portion 42d (the secondary expansion area 27 and the planned compression region 67) on the front side of the starting point PS including the end side division portion 51 and the peripheral portion 42 in 41 is used as the compression portion 74, and the other portion is used. The folding storage body 70 is formed by using the gas guide flow path 29 and the expanded main body portions 31 and 35 as the non-compressed portion 71. The area of the compression portion 74 is the front end portion 70a of the folding storage body 70, that is, the front end 21c side of the airbag 20, and as shown in FIG. 1, the front pillar garnish 4 of the front pillar portion FP of the narrow storage space. It is configured to be stored in a portion covered with the roof head lining 5 on the front end side.

つぎに、エアバッグ20を折り畳み、圧縮部74を形成して折畳収納体70を形成する工程を説明する。まず、エアバッグ20の折畳工程では、車内側壁部22aと車外側壁部22bとを重ねるように平らに展開した状態のバッグ本体21の基布58を、上下方向側の幅寸法を縮めるように(下縁21b側を上縁21a側に接近させるように)折り畳んで、バッグ折畳体60を形成する。具体的には、実施形態では、図4のA,Bに示すように、バッグ本体21の上縁21a側のガス案内流路29の部位を、前後方向に略沿うように配置される2つの折目L1,L2で折り畳んで、蛇腹折りし、ガス案内流路29の下方の領域を、車内側壁部22aと車外側壁部22bとを重ねた状態から、下縁21bを車外側Oに向かって巻くようなロール折りにより、折り畳んでいる(図4のA〜C参照)。さらに詳細に折畳工程を説明すれば、平らにしたバッグ本体21を、図示しない折り機の載置台にセットし、図示しない折り板を使用して、ガス案内流路29の部位に、前後方向に略沿った2本の折目L1,L2を付けつつ折目L1,L2の部位で折り重ねるようにして、蛇腹折り部位61を形成する。そして、この蛇腹折り部位61の形成と略同時に、ロール折り部位62を形成する。実施形態では、図5に示すように、エアAを吸引可能な吸気孔80aを多数備えた長尺円筒状の巻き芯80を使用して、ロール折り部位62を、形成する。詳細には、車内側壁部22aと車外側壁部22bとを重ねるように平らに展開した状態の基布58におけるバッグ本体21の下縁21b側の車外側壁部22b側の面に、図5のA,Bに示すように、巻き芯80を配置させ、この巻き芯80の外周面にバッグ本体21を吸着させるように、吸気孔80aからエアAを吸引しつつ、巻き芯80を回転させて、巻き芯80の周囲にバッグ本体21の下縁21b側の部位の基布58を巻き取らせる(図6のA参照)。その後、図6のBに示すように、吸気孔80aからエアAを排出させて、巻き芯80とバッグ本体21(基布58)との間に僅かな隙間を形成しつつ、巻き芯80を引き抜けば、蛇腹折り部位61の下側にロール折り部位62を形成することができて、バッグ折畳体60を形成することができる(図8のA参照)。なお、ロール折り部位62では、図7のAに示すように、中心に、巻き芯80の体積分の空間部位Hが、生じている。 Next, a step of folding the airbag 20 to form the compression portion 74 to form the folding storage body 70 will be described. First, in the folding process of the airbag 20, the width dimension of the base cloth 58 of the bag body 21 in a state where the inner side wall portion 22a of the vehicle and the outer wall portion 22b of the vehicle are vertically unfolded so as to overlap each other is reduced in the vertical direction. The bag folding body 60 is formed by folding the bag (so that the lower edge 21b side approaches the upper edge 21a side). Specifically, in the embodiment, as shown in A and B of FIG. 4, two portions of the gas guide flow path 29 on the upper edge 21a side of the bag body 21 are arranged so as to substantially follow the front-rear direction. Fold it at the folds L1 and L2, fold it bellows, and from the state where the inner side wall portion 22a and the outer wall portion 22b of the vehicle overlap each other in the area below the gas guide flow path 29, the lower edge 21b faces the outer side O of the vehicle. It is folded by roll-folding (see A to C in FIG. 4). To explain the folding process in more detail, the flattened bag body 21 is set on a mounting table of a folding machine (not shown), and a folding plate (not shown) is used to move the gas guide flow path 29 in the front-rear direction. The bellows fold portion 61 is formed by folding the folds L1 and L2 at the portions of the folds L1 and L2 while making two folds L1 and L2 substantially along the line. Then, the roll folding portion 62 is formed substantially at the same time as the formation of the bellows folding portion 61. In the embodiment, as shown in FIG. 5, a roll folding portion 62 is formed by using a long cylindrical winding core 80 having a large number of intake holes 80a capable of sucking air A. Specifically, FIG. 5 is formed on a surface of the base cloth 58 in a state where the inner side wall portion 22a of the vehicle and the outer wall portion 22b of the vehicle are flatly developed so as to overlap each other, on the surface of the outer wall portion 22b of the bag body 21 on the lower edge 21b side. As shown in A and B of the above, the winding core 80 is arranged, and the winding core 80 is rotated while sucking air A from the intake hole 80a so that the bag body 21 is attracted to the outer peripheral surface of the winding core 80. Then, the base cloth 58 of the portion on the lower edge 21b side of the bag body 21 is wound around the winding core 80 (see A in FIG. 6). After that, as shown in B of FIG. 6, the air A is discharged from the intake hole 80a, and the winding core 80 is formed while forming a slight gap between the winding core 80 and the bag body 21 (base cloth 58). When pulled out, the roll folding portion 62 can be formed under the bellows folding portion 61, and the bag folding body 60 can be formed (see A in FIG. 8). In the roll folding portion 62, as shown in A of FIG. 7, a space portion H corresponding to the volume of the winding core 80 is generated at the center.

このバッグ折畳体60では、既述したように、テンションベルト55を含めた端側膨張部39や前保護膨張部32の前端部32aの領域を、圧縮予定領域67(図8のA参照)としており、この圧縮予定領域67は、前保護膨張部32の前端部32aに、テンションベルト55の略容積分の基布58を配設させて、厚さ調整手段95として構成される下方延設部32bが形成されている(図2参照)。すなわち、下方延設部32bが、厚さ調整手段95としての基布58の使用量を大きくする基布面積拡大エリア95aを構成しており、折り畳まれたバッグ折畳体60の圧縮予定領域67におけるテンションベルト55を配設させたベルト配設部位(端側区画部51の前方側の部位)68と、ベルト配設部位68に前後方向で隣接する隣接部位69(前保護膨張部32の前端部32aの部位)とが、同じ厚さ寸法(外形寸法、太さ寸法)d1として、連なっている。 In this bag folding body 60, as described above, the region of the end side expansion portion 39 including the tension belt 55 and the front end portion 32a of the front protection expansion portion 32 is to be compressed as a planned compression region 67 (see A in FIG. 8). The planned compression region 67 is a downward extension that is configured as a thickness adjusting means 95 by disposing a base cloth 58 corresponding to a substantially volume of the tension belt 55 on the front end portion 32a of the front protective expansion portion 32. A portion 32b is formed (see FIG. 2). That is, the downward extending portion 32b constitutes a base cloth area expansion area 95a that increases the amount of the base cloth 58 used as the thickness adjusting means 95, and the planned compression area 67 of the folded bag folding body 60. The belt arrangement portion (the portion on the front side of the end side partition 51) 68 on which the tension belt 55 is arranged, and the adjacent portion 69 (the front end of the front protective expansion portion 32) adjacent to the belt arrangement portion 68 in the front-rear direction. The portion (part 32a) is connected as the same thickness dimension (external dimension, thickness dimension) d1.

なお、テンションベルト55は、図示していないが、端側膨張部39の基布58とともにロール折りされて、ロール折り部位62を形成している。 Although not shown, the tension belt 55 is roll-folded together with the base cloth 58 of the end-side expansion portion 39 to form the roll-folded portion 62.

ついで、エアバッグ20を折り畳んだバッグ折畳体60の圧縮予定領域67には、図7に示すバッグ加熱圧縮機85を使用して、加熱圧縮加工を施す。まず、図7のA,Bに示すように、バッグ折畳体60の圧縮予定領域67を、バッグ加熱圧縮機85の固定型86の凹部87内に押し込む。この時、固定型86の凹部87の両側面89,90間の開口寸法B1は、折目L1,L2を上方に反らせるように蛇腹折り部位61を折り曲げない状態として、バッグ折畳体60の左右方向の外形寸法(幅寸法)D1より小さく設定されており、凹部87に押し込まれるバッグ折畳体60は、空間部位Hが左右方向で若干押し潰されて、固定型86の凹部87内に収納される。また、バッグ折畳体60を凹部87に押し込む際には、凹部87の底面88から離れた側に、すなわち、凹部87の開口87a側に、蛇腹折り部位61を配置させ、ロール折り部位62を底面88や両側面89,90に接触させるようにして、押し込む。 Next, the planned compression region 67 of the bag folding body 60 in which the airbag 20 is folded is subjected to heat compression processing using the bag heat compressor 85 shown in FIG. 7. First, as shown in FIGS. 7A and 7B, the planned compression region 67 of the bag folding body 60 is pushed into the recess 87 of the fixed mold 86 of the bag heating compressor 85. At this time, the opening dimension B1 between the side surfaces 89 and 90 of the recess 87 of the fixed mold 86 is such that the bellows folding portion 61 is not bent so as to bend the folds L1 and L2 upward, and the left and right sides of the bag folding body 60 are not bent. The bag folding body 60, which is set smaller than the external dimension (width dimension) D1 in the direction and is pushed into the recess 87, has the space portion H slightly crushed in the left-right direction and is stored in the recess 87 of the fixed type 86. Will be done. Further, when the bag folding body 60 is pushed into the recess 87, the bellows folding portion 61 is arranged on the side away from the bottom surface 88 of the recess 87, that is, on the opening 87a side of the recess 87, and the roll folding portion 62 is formed. Push it in so that it is in contact with the bottom surface 88 and both side surfaces 89 and 90.

ついで、図7のB,Cに示すように、可動型92の押し板93を凹部87に挿入させて、押し板93を、底面88に接近させるように、上方からバッグ折畳体60の蛇腹折り部位61に押し付けて、バッグ折畳体60を圧縮するとともに図示しないヒータを使用して、所定時間加熱して、圧縮部74を、形成する。この時、圧縮予定領域67では、両側面89,90に規制された状態での押し板93の押し付けにより、蛇腹折り部位61と、ロール折り部位62の上下の基布58の積層された部位、すなわち、上側積層部63及び下側積層部64とが、押し板93や底面88に沿う状態となるものの、ロール折り部位62の左右方向(幅方向)の側面側積層部65,66が、空間部位Hを左右から押し潰すように、相互に接近するような屈曲部65a,66aを設けて、折り曲げられて、圧縮部74が形成されることとなる。 Then, as shown in B and C of FIG. 7, the push plate 93 of the movable type 92 is inserted into the recess 87, and the bellows of the bag folding body 60 is inserted from above so that the push plate 93 approaches the bottom surface 88. The bag folding body 60 is pressed against the folding portion 61 and heated for a predetermined time using a heater (not shown) to form the compression portion 74. At this time, in the planned compression region 67, the bellows folding portion 61 and the upper and lower base cloths 58 of the roll folding portion 62 are laminated by pressing the pressing plate 93 in a state of being restricted to both side surfaces 89 and 90. That is, although the upper laminated portion 63 and the lower laminated portion 64 are in a state along the push plate 93 and the bottom surface 88, the side laminated portions 65 and 66 in the left-right direction (width direction) of the roll folding portion 62 are spaces. Bending portions 65a and 66a that are close to each other are provided so as to crush the portion H from the left and right, and the portion H is bent to form the compression portion 74.

そのため、圧縮部74は、ロール折り部位62の中心の空間部位Hを潰しつつ、上下の上側積層部63と下側積層部64との間で、左右の側面側積層部65,66が、各々の上下方向の中央付近を屈曲させてなる屈曲部65a,66aを、上側積層部63と下側積層部64とに圧接させた状態を維持しつつ、相互に当接させるように、折り曲げられて、空間部位Hを消失する状態となり、加工前と比較して軸直交方向の断面形状を小さくするように形成される。実施形態の場合、圧縮部74は、断面の外形寸法を、圧縮前の圧縮予定領域67の外形寸法の上下方向と左右方向とで、略7〜8割程度となるように、圧縮されることとなる。また、この加熱圧縮時には、バッグ本体21を構成している基布58(車内側壁部22a,車外側壁部22b)自体も、圧縮されることとなって、圧縮加工を施されていない折畳収納体70の非圧縮部71の部位を構成している基布58(車内側壁部22a,車外側壁部22b)よりも、薄くなる。また、バッグ加熱圧縮機85は、バッグ折畳体60を、100℃程度に昇温させつつ所定の押圧力で圧縮するように、構成されている。 Therefore, in the compression portion 74, while crushing the space portion H at the center of the roll folding portion 62, the left and right side laminating portions 65 and 66 are respectively between the upper and lower upper laminating portions 63 and the lower laminating portion 64. The bent portions 65a and 66a, which are bent near the center in the vertical direction of the above, are bent so as to be in contact with each other while maintaining the state of being in pressure contact with the upper laminated portion 63 and the lower laminated portion 64. , The space portion H disappears, and the cross-sectional shape in the direction orthogonal to the axis is made smaller than that before processing. In the case of the embodiment, the compression unit 74 is compressed so that the external dimensions of the cross section are approximately 70 to 80% in the vertical direction and the horizontal direction of the external dimensions of the planned compression region 67 before compression. It becomes. Further, at the time of this heat compression, the base cloth 58 (vehicle inner side wall portion 22a, vehicle outer wall portion 22b) itself constituting the bag body 21 is also compressed, and the folding process is not performed. It is thinner than the base cloth 58 (vehicle inner side wall portion 22a, vehicle outer wall portion 22b) forming the portion of the non-compressed portion 71 of the storage body 70. Further, the bag heating compressor 85 is configured to compress the bag folding body 60 with a predetermined pressing force while raising the temperature to about 100 ° C.

バッグ加熱圧縮機85により圧縮部74を形成した後には、基布58の復元が抑制されるように、図示しないバッグ冷却圧縮機を使用して、圧縮部74の圧縮状態を維持しつつ圧縮部74を冷却させれば、折畳収納体70を形成することができる。このように形成された圧縮部74は、前後方向の長さ方向に沿って、均等な厚さ寸法d2(図8のB参照)として、形成されている。 After the compression section 74 is formed by the bag heating compressor 85, a bag cooling compressor (not shown) is used to suppress the restoration of the base cloth 58, and the compression section is maintained while maintaining the compressed state of the compression section 74. If the 74 is cooled, the folding storage body 70 can be formed. The compressed portion 74 formed in this way is formed as a uniform thickness dimension d2 (see B in FIG. 8) along the length direction in the front-rear direction.

折畳収納体70を形成した後には、図8のB,Cに示すように、裏面側に粘着剤を設けられて破断可能なテープ材からなるカバー材78と折り崩れ防止材77とを、折畳収納体70の外周面を包むように、所定箇所に巻き付ける。折り崩れ防止材77は、折畳収納体70の複数箇所に巻き付け、カバー材78は、圧縮部74と折畳収納体70の圧縮されていない非圧縮部71との境界部位72付近に、巻き付ける。 After forming the foldable storage body 70, as shown in B and C of FIG. 8, a cover material 78 made of a tape material which is provided with an adhesive on the back surface side and can be broken and a collapse prevention material 77 are provided. Wrap it around a predetermined location so as to wrap the outer peripheral surface of the folding storage body 70. The collapse prevention material 77 is wrapped around a plurality of locations of the folding storage body 70, and the cover material 78 is wrapped around the boundary portion 72 between the compressed portion 74 and the uncompressed non-compressed portion 71 of the folding storage body 70. ..

その後、取付ブラケット16を取付済みのインフレーター14を、クランプ15を利用して、エアバッグ20の流入口部23と接続させ、各取付部44,56に、取付ブラケット11を固着させて、エアバッグ組付体を形成する。 After that, the inflator 14 to which the mounting bracket 16 has been mounted is connected to the inflow port portion 23 of the airbag 20 by using the clamp 15, and the mounting bracket 11 is fixed to the mounting portions 44 and 56 to fix the airbag. Form an assembly.

ついで、取付ブラケット11,16を、ボディ1側のインナパネル2の所定位置に配置させて、ボルト12,17止めし、所定のインフレーター作動用の制御装置から延びる図示しないリード線を、インフレーター14に結線し、フロントピラーガーニッシュ4やルーフヘッドライニング5をボディ1側のインナパネル2に取り付け、さらに、ピラーガーニッシュ6,7をボディ1側のインナパネル2に取り付ければ、頭部保護エアバッグ装置Mを車両Vに搭載することができる。 Next, the mounting brackets 11 and 16 are arranged at predetermined positions on the inner panel 2 on the body 1 side, the bolts 12 and 17 are fastened, and a lead wire (not shown) extending from the control device for operating the predetermined inflator is attached to the inflator 14. If the front pillar garnish 4 and the roof head lining 5 are attached to the inner panel 2 on the body 1 side, and the pillar garnishes 6 and 7 are attached to the inner panel 2 on the body 1 side, the head protection airbag device M can be installed. It can be mounted on the vehicle V.

頭部保護エアバッグ装置Mの車両Vへの搭載後、車両Vの側面衝突時、若しくは、ロールオーバー時に、制御装置からの作動信号を受けてインフレーター14が作動されれば、インフレーター14から吐出される膨張用ガスが、エアバッグ20(バッグ本体21)内に流入して、膨張するエアバッグ20(バッグ本体21)が、折り崩れ防止材77とカバー材78とを破断させ、さらに、フロントピラーガーニッシュ4とルーフヘッドライニング5との下縁4a,5aから構成されるエアバッグカバー9を押し開いて、下方へ突出しつつ、折りを解消するように展開して、図1の二点鎖線や図9〜11に示すように、窓W1,W2、センターピラー部CP、及び、リヤピラー部RPの一部の車内側Iを覆うように、大きく膨張することとなる。 After the head protection airbag device M is mounted on the vehicle V, if the inflator 14 is operated in response to an operation signal from the control device at the time of a side collision or rollover of the vehicle V, the airbag is discharged from the inflator 14. The expanding gas flows into the airbag 20 (bag body 21), and the expanding airbag 20 (bag body 21) breaks the collapse prevention material 77 and the cover material 78, and further, the front pillar. The airbag cover 9 composed of the lower edges 4a and 5a of the garnish 4 and the roof head lining 5 is pushed open and expanded so as to eliminate the fold while protruding downward, and the two-point chain line and the figure of FIG. As shown in 9 to 11, the windows W1 and W2, the center pillar portion CP, and a part of the rear pillar portion RP are greatly expanded so as to cover the inside I of the vehicle.

詳しく述べれば、実施形態の頭部保護エアバッグ20の折畳収納体70では、インフレーター14からの膨張用ガスGは、流入口部23から遮蔽膨張部24のガス案内流路29に流入し、図10のA,B,Cに示すように、一次展開エリア26では、蛇腹折り部位61の折目L1,L2の折りを解消しつつ、ガス案内流路29内を前後両側に流れて、供給口31a,35aに流れ、供給口31a,35aから膨張本体部31,35に流入して、ロール折り部位62のロール折りを解消させて、バッグ本体21の下縁21b側を、窓W1,W2に沿わせる方向の展開方向に安定させて、車内側Iに突出させずに、すなわち、窓W1,W2に接近させつつ、展開膨張させる展開挙動であって、乗員と干渉し難い展開挙動として、遮蔽膨張部24を展開膨張させることができる。一方、圧縮部74の設けられた二次展開エリア27では、図11のA,B,Cに示すように、蛇腹折り部位61の折目L1,L2を解消し、また、ロール折り部位62の折りを解消して、展開膨張しようとするが、圧縮されて迅速に展開膨張し難い圧縮部74を備えていることから、図9のA,B,Cに示すように、一次展開エリア26より遅れて、一次展開エリア26に追従するように、展開膨張する。しかし、二次展開エリア27が遅れて展開膨張しても、既に、窓W1,W2を広く覆う一次展開エリア26が、ロール折りの折りを解消して、所定の展開挙動により展開膨張していることから、窓W1,W2に接近する乗員頭部を、迅速に、受け止めて保護することができる。 More specifically, in the folding storage body 70 of the head protection airbag 20 of the embodiment, the expansion gas G from the inflator 14 flows from the inflow port portion 23 into the gas guide flow path 29 of the shielding expansion portion 24. As shown in A, B, and C of FIG. 10, in the primary deployment area 26, the folds L1 and L2 of the bellows fold portion 61 are eliminated, and the folds L1 and L2 flow in the gas guide flow path 29 in both front and rear directions to supply. It flows into the ports 31a and 35a and flows into the expansion main bodies 31 and 35 from the supply ports 31a and 35a to eliminate the roll folding of the roll folding portion 62, and the lower edge 21b side of the bag main body 21 is opened to the windows W1 and W2. It is a deployment behavior that stabilizes in the deployment direction in the direction along the vehicle and expands and expands without protruding toward the inside I of the vehicle, that is, while approaching the windows W1 and W2, and as a deployment behavior that does not easily interfere with the occupant. The shield expansion unit 24 can be expanded and expanded. On the other hand, in the secondary development area 27 provided with the compression portion 74, as shown in A, B, and C of FIG. 11, the folds L1 and L2 of the bellows folding portion 61 are eliminated, and the roll folding portion 62 Since it is provided with a compression unit 74 that is compressed and is difficult to expand and expand quickly, although it tries to expand and expand by canceling the fold, as shown in A, B, and C of FIG. 9, from the primary expansion area 26. With a delay, it expands and expands so as to follow the primary expansion area 26. However, even if the secondary expansion area 27 is expanded and expanded with a delay, the primary expansion area 26 that widely covers the windows W1 and W2 has already been expanded and expanded according to a predetermined expansion behavior by eliminating the roll folding. Therefore, the occupant's head approaching the windows W1 and W2 can be quickly received and protected.

以上のように、実施形態の頭部保護エアバッグ20の折畳収納体70では、テンションベルト55の配設部位68とこの配設部位68に前後方向に沿って隣接する隣接部位69とが、厚さ調整手段95により、圧縮前の折畳後の厚さ寸法d1を、前後方向に沿って略均一となるように、構成されることから、圧縮部74を形成する際の押し板93を、折畳後の圧縮予定領域67に均等に押し付けることができて、圧縮部74を、前後方向の長さ方向に沿って、均等な厚さ寸法d2(図8のB参照)として、形成できる。 As described above, in the folding storage body 70 of the head protection airbag 20 of the embodiment, the arrangement portion 68 of the tension belt 55 and the adjacent portion 69 adjacent to the arrangement portion 68 along the front-rear direction are formed. Since the thickness adjusting means 95 is configured so that the thickness dimension d1 after folding before compression is substantially uniform along the front-rear direction, the push plate 93 when forming the compression portion 74 is formed. , It can be evenly pressed against the compressed area 67 after folding, and the compressed portion 74 can be formed as a uniform thickness dimension d2 (see B in FIG. 8) along the length direction in the front-rear direction. ..

したがって、実施形態の頭部保護エアバッグ20の折畳収納体70では、テンションベルト55の配設部位68を含んで圧縮した圧縮部74を、長さ方向に沿って均等な厚さ寸法(外形寸法、太さ寸法)d2として構成できて、狭い収納部位のフロントピラー部FP内でも容易に収納することができる。 Therefore, in the folding storage body 70 of the head protection airbag 20 of the embodiment, the compressed portion 74 including the arrangement portion 68 of the tension belt 55 is compressed with a uniform thickness dimension (outer shape) along the length direction. It can be configured as (dimension, thickness dimension) d2, and can be easily stored even in the front pillar portion FP of a narrow storage portion.

なお、実施形態では、厚さ調整手段95として、隣接部位69における前保護膨張部32の前端部32aに配設されるエアバッグ用基布58の使用量より、テンションベルト55の配設部位68の端側膨張部39に配設されるエアバッグ用基布58の使用量を少なくする調整手段としている。すなわち、厚さ調整手段95は、テンションベルト55の略容積分の差を、ベルト配設部位68と隣接部位69とで生じないように、調整するものであり、実施形態の場合、テンションベルト55の略容積分、基布58の使用量を多くする基布面積拡大エリア95aを隣接部位69に設けるように、下方延設部32bを設けて、テンションベルト55の容積分の差が、ベルト配設部位68と隣接部位69とで生じないように、調整している。 In the embodiment, as the thickness adjusting means 95, the arrangement portion 68 of the tension belt 55 is used based on the amount of the airbag base cloth 58 disposed at the front end portion 32a of the front protection expansion portion 32 in the adjacent portion 69. It is used as an adjusting means for reducing the amount of the airbag base cloth 58 disposed in the end-side expansion portion 39 of the above. That is, the thickness adjusting means 95 adjusts the tension belt 55 so that a difference of substantially the volume of the tension belt 55 does not occur between the belt arrangement portion 68 and the adjacent portion 69. In the case of the embodiment, the tension belt 55 The lower extension portion 32b is provided so that the base cloth area expansion area 95a that increases the amount of the base cloth 58 used is provided in the adjacent portion 69, and the difference in the volume of the tension belt 55 is the belt distribution. It is adjusted so that it does not occur at the installation site 68 and the adjacent site 69.

さらに、テンションベルト55の略容積分の差を、ベルト配設部位68と隣接部位69とで生じないように、調整するものとして、図12や図14に示す厚さ調整手段97,99が例示できる。 Further, the thickness adjusting means 97 and 99 shown in FIGS. 12 and 14 are exemplified as those for adjusting the difference of substantially the volume of the tension belt 55 so as not to occur between the belt arrangement portion 68 and the adjacent portion 69. it can.

図12に示す厚さ調整手段97では、エアバッグ20Aのバッグ本体21Aにおいて、隣接部位69に配設されるエアバッグ用基布58の繊度(糸の太さ)より、テンションベルト55の配設部位68に配設されるエアバッグ用基布58の繊度を細くして、すなわち、配設部位68を細糸使用エリア97aとして、調整するものである。 In the thickness adjusting means 97 shown in FIG. 12, in the bag body 21A of the airbag 20A, the tension belt 55 is arranged based on the fineness (thickness of the thread) of the airbag base cloth 58 arranged at the adjacent portion 69. The fineness of the airbag base cloth 58 arranged at the portion 68 is reduced, that is, the arrangement portion 68 is adjusted as the fine thread use area 97a.

具体的には、バッグ本体21Aは、前後方向に沿って配設される経糸LSと上下方向に沿って配設される緯糸VSとを織って(袋織りして)、基布58が形成されており、エアバッグ20Aの隣接部位69に配設されるエアバッグ用基布58の緯糸VSの太さdS1より、テンションベルト55の配設部位68に配設されるエアバッグ用基布58の緯糸VSの太さdS2を細くして(dS1>dS2)、テンションベルト55の略容積分の差が、折り畳んだ後のベルト配設部位68と隣接部位69との間で現れないように、設定されている。そのため、エアバッグ20Aを実施形態と同様に折り畳んでバッグ折畳体60Aを形成すれば、図13のAに示すように、ベルト配設部位68と隣接部位69とを配設されてなる圧縮予定領域67は、厚さ寸法d1を、前後方向に沿って略均一となるように、構成され、さらにその後、圧縮部74Aを形成する際、押し板93を、折畳後の圧縮予定領域67に均等に押し付けることができて、圧縮部74Aを、前後方向の長さ方向に沿って、均等な厚さ寸法d2(図13のB参照)として、形成できる。 Specifically, the bag body 21A is formed by weaving (bag weaving) the warp threads LS arranged along the front-rear direction and the weft threads VS arranged along the vertical direction to form the base cloth 58. From the thickness dS1 of the weft VS of the airbag base cloth 58 arranged at the adjacent portion 69 of the airbag 20A, the air bag base cloth 58 disposed at the arrangement portion 68 of the tension belt 55. The thickness dS2 of the weft VS is reduced (dS1> dS2) so that the difference of approximately the volume of the tension belt 55 does not appear between the belt arrangement portion 68 and the adjacent portion 69 after folding. Has been done. Therefore, if the airbag 20A is folded in the same manner as in the embodiment to form the bag folding body 60A, as shown in A of FIG. 13, the belt arrangement portion 68 and the adjacent portion 69 are arranged to be compressed. The region 67 is configured so that the thickness dimension d1 is substantially uniform along the front-rear direction, and when the compression portion 74A is formed thereafter, the push plate 93 is set to the compression planned region 67 after folding. It can be pressed evenly, and the compression portion 74A can be formed as a uniform thickness dimension d2 (see B in FIG. 13) along the length direction in the front-rear direction.

そのため、このエアバッグ20Aの折畳収納体70Aでも、テンションベルト55の配設部位68を含んで圧縮した圧縮部74Aを、長さ方向に沿って均等な厚さ寸法(外形寸法、太さ寸法)d2として構成できて、狭い収納部位のフロントピラー部FP内でも容易に収納することができる。 Therefore, even in the folding storage body 70A of the airbag 20A, the compressed portion 74A including the arrangement portion 68 of the tension belt 55 is compressed with uniform thickness dimensions (external dimensions, thickness dimensions) along the length direction. ) It can be configured as d2 and can be easily stored even in the front pillar portion FP of a narrow storage portion.

図14に示す厚さ調整手段99は、エアバッグ20Bのバッグ本体21Bにおいて、隣接部位69に配設されるエアバッグ用基布58に塗布するガス非透過性を確保したり耐熱性を確保するためのコーティング剤98(例えば、ウレタン製のコーティング剤98)のコート量V1より、テンションベルト55の配設部位68に配設されるエアバッグ用基布58に塗布するコート量V2を少なくして、すなわち、配設部位68をコート量減少エリア99aとして、調整するものである。 The thickness adjusting means 99 shown in FIG. 14 ensures gas impermeableness to be applied to the airbag base cloth 58 disposed at the adjacent portion 69 and heat resistance in the bag body 21B of the airbag 20B. The coating amount V2 applied to the airbag base cloth 58 arranged at the arrangement portion 68 of the tension belt 55 is smaller than the coating amount V1 of the coating agent 98 (for example, urethane coating agent 98). That is, the arrangement portion 68 is adjusted as the coating amount reduction area 99a.

具体的には、隣接部位69に塗布するコーティング剤98の厚さ寸法t1を、配設部位68に塗布するコーティング剤98の厚さ寸法t2より、厚くして(t1>t2)、隣接部位69に塗布するコート量V1が、配設部位68に塗布するコート量V2より、テンションベルト55の略容積分、多く設定されている。そのため、エアバッグ20Bを実施形態と同様に折り畳んでバッグ折畳体60Bを形成すれば、図15のAに示すように、ベルト配設部位68と隣接部位69とを配設されてなる圧縮予定領域67は、厚さ寸法d1を、前後方向に沿って略均一となるように、構成され、さらにその後、圧縮部74Bを形成する際、押し板93を、折畳後の圧縮予定領域67に均等に押し付けることができて、圧縮部74Bを、前後方向の長さ方向に沿って、均等な厚さ寸法d2(図15のB参照)として、形成できる。 Specifically, the thickness dimension t1 of the coating agent 98 applied to the adjacent portion 69 is made thicker than the thickness dimension t2 of the coating agent 98 applied to the arrangement portion 68 (t1> t2), and the adjacent portion 69 The amount of coating V1 applied to is set to be larger than the amount of coating V2 applied to the arrangement portion 68 by approximately the volume of the tension belt 55. Therefore, if the airbag 20B is folded in the same manner as in the embodiment to form the bag folding body 60B, as shown in FIG. 15A, the belt arrangement portion 68 and the adjacent portion 69 are arranged to be compressed. The region 67 is configured so that the thickness dimension d1 is substantially uniform along the front-rear direction, and when the compression portion 74B is formed thereafter, the push plate 93 is set to the compression planned region 67 after folding. It can be pressed evenly, and the compression portion 74B can be formed as a uniform thickness dimension d2 (see B in FIG. 15) along the length direction in the front-rear direction.

そのため、このエアバッグ20Bの折畳収納体70Bでも、テンションベルト55の配設部位68を含んで圧縮した圧縮部74Bを、長さ方向に沿って均等な厚さ寸法(外形寸法、太さ寸法)d2として構成できて、狭い収納部位のフロントピラー部FP内でも容易に収納することができる。 Therefore, even in the folding storage body 70B of the airbag 20B, the compressed portion 74B including the arrangement portion 68 of the tension belt 55 is compressed with uniform thickness dimensions (external dimensions, thickness dimensions) along the length direction. ) It can be configured as d2 and can be easily stored even in the front pillar portion FP of a narrow storage portion.

なお、実施形態の圧縮部74は、図7のCに示すように、上面74a側に、折目L1,L2を設けた蛇腹折り部位61を押し潰した蛇腹状圧縮部75を設け、蛇腹状圧縮部75の直下に、ロール折り部位62を押し潰したロール状圧縮部76を設けて構成され、流入する膨張用ガスの上流部位となる蛇腹状圧縮部75が、凹むような部位を設けられずに、蛇腹折り部位61の折目L1,L2を重ねた状態で、単に、上下方向に圧縮されているだけである。そのため、圧縮部74の展開膨張時には、流入する膨張用ガスGの上流側の蛇腹折り部位61からなる蛇腹状圧縮部75が、図11のA,Bに示すように、折目L1,L2を解消するように、膨らんで、ロール状圧縮部76を、円滑に、窓W1に沿うように、展開方向を安定させて、下方側へ押し出すことができる。 As shown in C of FIG. 7, the compression portion 74 of the embodiment is provided with a bellows-shaped compression portion 75 on the upper surface 74a side, which is obtained by crushing the bellows-shaped compression portion 61 provided with the folds L1 and L2. A roll-shaped compression portion 76 in which the roll folding portion 62 is crushed is provided immediately below the compression portion 75, and a bellows-shaped compression portion 75, which is an upstream portion of the inflowing expansion gas, is provided with a recessed portion. Instead, the folds L1 and L2 of the bellows folding portion 61 are overlapped and simply compressed in the vertical direction. Therefore, at the time of expansion and expansion of the compression portion 74, the bellows-shaped compression portion 75 including the bellows folding portion 61 on the upstream side of the inflowing expansion gas G forms the folds L1 and L2 as shown in A and B of FIG. The roll-shaped compression portion 76 can be smoothly pushed downward along the window W1 by stabilizing the deployment direction so as to be eliminated.

そしてまた、押し出されたロール折り部位62からなるロール状圧縮部76は、ロール折り部位62の中心の空間部位Hが上下左右、特に、左右から押し潰されて、すなわち、空間部位Hが、上下の上側積層部63と下側積層部64とに上下から押し潰されるとともに、左右の側面側積層部65、66の屈曲部65a,66aが、空間部位Hを無くすように、進入して、空間部位Hを消失させた略四角柱状(略正四角柱状)として、形成されている。そのため、ロール状圧縮部76が折りを解消して膨らむ際には、上側積層部63、屈曲部65aを有した側面側積層部65、下側積層部64、及び、屈曲部66aを有した側面側積層部66における外表面側のガス流入部22(端側膨張部39や前保護膨張部32の前端部32a)の部位に、膨張用ガスGを流入させて、巻きを解くように、ロール折りを解消して、下縁21b側まで展開膨張する。そのため、折りを解消する際のロール状圧縮部76の回転は、断面形状を略四角形状(略正四角形状)として、回転中心からの回転半径を各部位で大きくばらつかせずに略均等とすることができて、円滑に回転して折りを解消する。その結果、蛇腹状圧縮部75の折りの解消時の窓W1に沿う押出方向を基準とし、窓W1に接近しつつロール折りの折りの解消を実行する状態となって、圧縮部74は、車内側Iへの突出を抑えて、下縁21b側まで展開方向を安定させて展開膨張することができる。 Further, in the roll-shaped compression portion 76 composed of the extruded roll folding portion 62, the space portion H at the center of the roll folding portion 62 is crushed vertically and horizontally, particularly from the left and right, that is, the space portion H is vertically and vertically. The upper laminated portion 63 and the lower laminated portion 64 are crushed from above and below, and the bent portions 65a and 66a of the left and right side laminated portions 65 and 66 enter into the space so as to eliminate the space portion H. It is formed as a substantially square columnar (substantially regular square columnar) in which the portion H is eliminated. Therefore, when the roll-shaped compression portion 76 is unfolded and swells, the upper laminated portion 63, the side surface side laminated portion 65 having the bent portion 65a, the lower laminated portion 64, and the side surface having the bent portion 66a. The expansion gas G is made to flow into the portion of the gas inflow portion 22 (end side expansion portion 39 and the front end portion 32a of the front protection expansion portion 32) on the outer surface side of the side laminated portion 66, and the roll is unwound. The fold is canceled and the fold is expanded to the lower edge 21b side. Therefore, the rotation of the roll-shaped compression unit 76 when canceling the fold has a substantially quadrangular cross-sectional shape (substantially regular quadrangular shape), and the radius of gyration from the center of rotation is not significantly dispersed in each part and is substantially uniform. It can rotate smoothly and eliminate folds. As a result, the compression unit 74 is in a state of executing the unfolding of the roll fold while approaching the window W1 with reference to the extrusion direction along the window W1 when the fold of the bellows-shaped compression unit 75 is unfolded. It is possible to suppress the protrusion to the inner side I and stabilize the deployment direction to the lower edge 21b side to expand and expand.

上記の点を考慮しなければ、圧縮部の圧縮態様は、実施形態に限られるものではなく、ロール折り部位62の空間部位Hが潰れて、非圧縮部71より断面形状が小さくなればよい。 If the above points are not taken into consideration, the compression mode of the compression portion is not limited to the embodiment, and the space portion H of the roll folding portion 62 may be crushed and the cross-sectional shape may be smaller than that of the non-compression portion 71.

また、実施形態では、エアバッグ20の下縁21b側を上縁21a側に接近させる折畳工程として、車外側に向かって巻くようなロール折りと蛇腹折りとによって、上下方向の幅寸法を縮めるように折り畳まれているが、下縁21b側を上縁21a側に接近させるように折り畳めれば、実施形態に限られるものではなく、上下の全域にわたって、蛇腹折りによって折り畳む構成としてもよい。 Further, in the embodiment, as a folding step of bringing the lower edge 21b side of the airbag 20 closer to the upper edge 21a side, the width dimension in the vertical direction is reduced by roll folding and bellows folding such as winding toward the outside of the vehicle. However, if the lower edge 21b side is folded so as to approach the upper edge 21a side, the present invention is not limited to the embodiment, and the entire upper and lower edges may be folded by bellows folding.

さらに、実施形態では、テンションベルト55が膨張部位(端側膨張部39)を跨いで、区画部51から前方に延びるように配設されているが、図16のAに示すエアバッグ20Cのように、テンションベルト55が、膨張部位を跨がずに、非流入部41の周縁部42の前縁42cに、配設される構成であってもよい。 Further, in the embodiment, the tension belt 55 is arranged so as to extend forward from the compartment 51 across the expansion portion (end side expansion portion 39), as in the airbag 20C shown in FIG. 16A. In addition, the tension belt 55 may be arranged on the front edge 42c of the peripheral edge portion 42 of the non-inflow portion 41 without straddling the expansion portion.

このエアバッグ20Cでは、テンションベルト55のベルト配設部位68が、バッグ本体21Cにおける周縁部42の前縁42cの部位となり、隣接部位69が、バッグ本体21Cにおける端側膨張部39、区画部51、及び、前保護膨張部32の前端部32aの部位、としている。 In this airbag 20C, the belt arrangement portion 68 of the tension belt 55 becomes the portion of the front edge 42c of the peripheral edge portion 42 in the bag body 21C, and the adjacent portion 69 is the end side expansion portion 39 and the partition portion 51 in the bag body 21C. , And the portion of the front end portion 32a of the front protective expansion portion 32.

そして、厚さ調整手段96としては、基布面積拡大エリア96aと、コート量調整エリア96b(ベルト配設部位68側をコート量減少エリア96cとし、隣接部位69側をコート量増大エリア96dとしている)と、を併用して構成されている。 As the thickness adjusting means 96, the base cloth area expanding area 96a and the coating amount adjusting area 96b (the belt arrangement portion 68 side is the coating amount decreasing area 96c, and the adjacent portion 69 side is the coating amount increasing area 96d). ) And are used together.

このエアバッグ20Cでも、実施形態と同様に折り畳んでバッグ折畳体60Cを形成すれば、図16のBに示すように、ベルト配設部位68と隣接部位69とを配設されてなる圧縮予定領域67は、厚さ寸法d1を、前後方向に沿って略均一となるように、構成され、さらにその後、圧縮部74Cを形成する際、押し板93を、折畳後の圧縮予定領域67に均等に押し付けることができて、圧縮部74Cを、前後方向の長さ方向に沿って、均等な厚さ寸法d2(図16のC参照)として、形成できる。 Even in this airbag 20C, if the bag folding body 60C is formed by folding in the same manner as in the embodiment, as shown in B of FIG. 16, the belt arrangement portion 68 and the adjacent portion 69 are arranged to be compressed. The region 67 is configured so that the thickness dimension d1 is substantially uniform along the front-rear direction, and when the compression portion 74C is formed thereafter, the push plate 93 is set to the compression planned region 67 after folding. It can be pressed evenly, and the compression portion 74C can be formed as a uniform thickness dimension d2 (see C in FIG. 16) along the length direction in the front-rear direction.

そのため、このエアバッグ20Cの折畳収納体70Cでも、テンションベルト55の配設部位68を含んで圧縮した圧縮部74Cを、長さ方向に沿って均等な厚さ寸法(外形寸法、太さ寸法)d2として構成できて、狭い収納部位のフロントピラー部FP内でも容易に収納することができる。 Therefore, even in the folding storage body 70C of the airbag 20C, the compressed portion 74C including the arrangement portion 68 of the tension belt 55 is compressed with uniform thickness dimensions (external dimensions, thickness dimensions) along the length direction. ) It can be configured as d2 and can be easily stored even in the front pillar portion FP of a narrow storage portion.

20,20A,20B,20C…エアバッグ、21,21A,21B,21C…バッグ本体、21a…上縁、21b…下縁、55…テンションベルト、58…エアバッグ用基布、60,60A,60B,60C…バッグ折畳体、67…圧縮予定領域、68…ベルト配設部位、69…隣接部位、70,70A,70B,70C…折畳収納体、74,74A,74B,74C…圧縮部、95,96…厚さ調整手段、95a…基布面積拡大エリア、97…厚さ調整手段、97a…細糸使用エリア、98…コーティング剤、99…厚さ調整手段、99a…コート量減少エリア。

20, 20A, 20B, 20C ... Airbags, 21,21A, 21B, 21C ... Bag body, 21a ... Upper edge, 21b ... Lower edge, 55 ... Tension belt, 58 ... Airbag base cloth, 60, 60A, 60B , 60C ... bag folding body, 67 ... planned compression area, 68 ... belt arrangement part, 69 ... adjacent part, 70, 70A, 70B, 70C ... folding storage body, 74, 74A, 74B, 74C ... compression part, 95, 96 ... Thickness adjusting means, 95a ... Base cloth area expanding area, 97 ... Thickness adjusting means, 97a ... Fine thread use area, 98 ... Coating agent, 99 ... Thickness adjusting means, 99a ... Coating amount reduction area.

Claims (4)

膨張用ガスの流入時に、収納された車両の窓の上縁側から前記窓を覆うように下方へ展開膨張するとともに、膨張完了時の前後方向の端部側に、前後方向に沿うテンションを確保可能に、前後方向に沿うように延びて、前記窓の周縁の車両のピラー部に連結されるテンションベルト、を備えた頭部保護エアバッグを、
平らに展開した下縁側を上縁側に接近させるように前後方向に沿った棒状に折り畳んだ後、前記テンションベルトの配設部位と該配設部位に前後方向に沿って隣接する隣接部位とを含めた端部側に、外形寸法を狭めるように圧縮させた圧縮部を設けて、前記窓の上縁側に収納する頭部保護エアバッグの折畳収納体であって、
前記圧縮部を形成するように圧縮される前記テンションベルトの配設部位と前記隣接部位との少なくともに一方に、厚さ寸法を調整する厚さ調整手段が設定され、
該厚さ調整手段により、前記テンションベルトの配設部位と前記隣接部位とが、圧縮前の折畳後の厚さ寸法を、前後方向に沿って略均一となるように、設定されていることを特徴とする頭部保護エアバッグの折畳収納体。
When the expansion gas flows in, it expands downward from the upper edge side of the stored vehicle window so as to cover the window, and at the same time, it is possible to secure tension along the front-rear direction on the end side in the front-rear direction when the expansion is completed. A head protection airbag with a tension belt, which extends along the front-rear direction and is connected to the pillar portion of the vehicle on the periphery of the window.
After folding the flatly developed lower edge side into a rod shape along the front-rear direction so as to approach the upper edge side, the tension belt disposition portion and the adjacent portion adjacent to the disposition portion along the front-rear direction are included. It is a folding storage body of a head protection airbag that is provided on the end side with a compression part compressed so as to narrow the external dimensions and is stored on the upper edge side of the window.
A thickness adjusting means for adjusting the thickness dimension is set on at least one of the arrangement portion and the adjacent portion of the tension belt that is compressed so as to form the compression portion.
By the thickness adjusting means, the arrangement portion of the tension belt and the adjacent portion are set so that the thickness dimension after folding before compression is substantially uniform along the front-rear direction. Folding storage body for head protection airbags featuring.
前記厚さ調整手段が、前記隣接部位に配設されるエアバッグ用基布の使用量より、前記テンションベルトの配設部位に配設されるエアバッグ用基布の使用量を少なくして、調整する構成としていることを特徴とする請求項1に記載の頭部保護エアバッグの折畳収納体。 The thickness adjusting means uses a smaller amount of the airbag base cloth disposed at the arrangement portion of the tension belt than the usage amount of the airbag base fabric disposed at the adjacent portion. The foldable storage body of the head protection airbag according to claim 1, wherein the structure is adjusted. 前記厚さ調整手段が、前記隣接部位に配設されるエアバッグ用基布の繊度より、前記テンションベルトの配設部位に配設されるエアバッグ用基布の繊度を細くして、調整する構成としていることを特徴とする請求項1に記載の頭部保護エアバッグの折畳収納体。 The thickness adjusting means adjusts the fineness of the airbag base cloth disposed at the arrangement portion of the tension belt by making it thinner than the fineness of the airbag base fabric disposed at the adjacent portion. The foldable storage body for the head protection airbag according to claim 1, wherein the airbag is configured. 前記厚さ調整手段が、前記隣接部位に配設されるエアバッグ用基布に塗布するコート量より、前記テンションベルトの配設部位に配設されるエアバッグ用基布に塗布するコート量を少なくして、調整する構成としていることを特徴とする請求項1に記載の頭部保護エアバッグの折畳収納体。 The amount of coating applied by the thickness adjusting means to the airbag base cloth disposed at the adjacent portion is larger than the coating amount applied to the airbag base fabric disposed at the tension belt arrangement portion. The foldable storage body of the head protection airbag according to claim 1, wherein the structure is adjusted by reducing the number of airbags.
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