JP4363294B2

JP4363294B2 - Head protection airbag

Info

Publication number: JP4363294B2
Application number: JP2004287481A
Authority: JP
Inventors: 雅夫木野; 直山本; 通康伊藤; 貴信池田
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 2004-09-30
Filing date: 2004-09-30
Publication date: 2009-11-11
Anticipated expiration: 2024-09-30
Also published as: CN1757546A; CN1757546B; JP2006096287A

Description

本発明は、車両の窓の上縁側に折り畳まれて収納され、膨張用ガスの流入時に、窓の上縁側から下方に展開膨張して、窓の車内側を覆う構成の頭部保護エアバッグに関する。 The present invention relates to a head protection airbag configured to be folded and housed on the upper edge side of a vehicle window and to be expanded and inflated downward from the upper edge side of the window to cover the inside of the window when inflating gas flows. .

従来、車両の窓の車内側を覆うように膨張を完了させる頭部保護エアバッグでは、膨張用ガスを流入させて、車内側壁部と車外側壁部とを離すように膨張するガス流入部と、車内側・車外側壁部相互を結合させて、膨張用ガスを流入させない非流入部と、を備えて構成されていた（例えば、特許文献１参照）。 Conventionally, in a head protection airbag that completes inflating so as to cover the inside of a vehicle window, a gas inflow portion that inflates so as to inflate an inflating gas and separate a vehicle inner wall portion and a vehicle outer wall portion; The vehicle interior and vehicle exterior wall portions are coupled to each other and include a non-inflow portion that does not allow the inflation gas to flow in (see, for example, Patent Document 1).

そして、ガス流入部は、ガス供給路部と、複数の並設セルと、を備えて構成されていた。ガス供給路部は、エアバッグの上縁側で、前後方向に沿って配置されるとともに、膨張用ガスを供給するためのインフレーターと接続される接続口部に連通している。並設セルは、エアバッグにおける乗員を保護する保護エリアに、前後方向に並設され、それぞれ、ガス供給路部側の上部側に膨張用ガスの流入口を有して、エアバッグの下縁側まで延びるように、形成されていた。 And the gas inflow part was comprised including the gas supply path part and the some juxtaposed cell. The gas supply path is disposed along the front-rear direction on the upper edge side of the airbag and communicates with a connection port connected to an inflator for supplying the inflation gas. The juxtaposed cells are juxtaposed in the front-rear direction in protective areas for protecting passengers in the airbag, each having an inflow port for inflation gas on the upper side of the gas supply path, and the lower edge side of the airbag It was formed to extend up to.

これらの並設セルは、膨張を完了させたエアバッグの形状を、丸く膨張させずに、窓に沿った板形状に厚さを規制し、また、エアバッグの前後方向の幅寸法を狭めて、エアバッグの下縁側に前後方向に沿う張力を生じさせ、車外側へ移動する乗員と干渉しても、エアバッグの車外側への移動を抑えて、エアバッグによる乗員の拘束性能を高めるために、配設されていた。 These juxtaposed cells regulate the thickness of the airbag that has been inflated to a plate shape along the window without inflating it in a round shape, and narrow the width in the front-rear direction of the airbag. In order to increase the restraint performance of the occupant by the airbag by suppressing the movement of the airbag to the outside of the vehicle even if it interferes with the occupant moving to the outside of the vehicle by generating a tension along the front and rear direction on the lower edge side of the airbag It was arranged.

また、エアバッグの非流入部は、エアバッグの外周縁を形成する周縁部と、エアバッグの下縁側における周縁部の下側縁部から連なって上方に延び、並設セルを区画する延設区画部と、を備えて構成されていた。
特開２００４−２０３２３４号公報 Further, the non-inflow portion of the airbag extends upward from the peripheral portion forming the outer peripheral edge of the airbag and the lower edge of the peripheral portion on the lower edge side of the airbag, and divides the juxtaposed cells. And a partition section.
JP 2004-203234 A

しかし、従来の頭部保護エアバッグでは、前後方向に並設された多数の並設セルは、単に、ガスの流入口を、上端に開口させて配置させ、ガス供給路部と連通させていた。 However, in the conventional head protection airbag, a large number of juxtaposed cells arranged in the front-rear direction are simply arranged with the gas inlet opening at the upper end to communicate with the gas supply path. .

そのため、膨張用ガスが、接続口部からガス供給路部に流入され、ガス供給路部内で、上流側から下流側へ前後方向に沿って流れると、膨張用ガスは、直線的に流れ易く、その結果、下流端の並設セルが、最も迅速に展開して厚く膨張したり、あるいは、接続口部に最も近い並設セルが、迅速に展開して厚く膨張し易くなっていた。 Therefore, when the expansion gas flows into the gas supply path portion from the connection port and flows along the front-rear direction from the upstream side to the downstream side in the gas supply path portion, the expansion gas easily flows linearly, As a result, the juxtaposed cells at the downstream end are expanded most rapidly and expanded thickly, or the juxtaposed cells closest to the connection port are easily expanded and expanded easily.

すなわち、従来の頭部保護エアバッグでは、ガス供給路部のガスの上流側から下流側までの間の所定の並設セルを、迅速に展開させて厚く膨張させる点に、課題があった。 That is, the conventional head protection airbag has a problem in that predetermined parallel cells between the upstream side and the downstream side of the gas in the gas supply path portion are rapidly expanded and inflated thickly.

本発明は、上述の課題を解決するものであり、ガス供給路部の膨張用ガスの上流側から下流側までの間の所定の並設セルを、迅速に展開させて厚く膨張させることができる頭部保護エアバッグを提供することを目的とする。 The present invention solves the above-mentioned problem, and can rapidly expand predetermined juxtaposed cells from the upstream side to the downstream side of the gas for expansion in the gas supply path portion so as to be expanded thickly. An object is to provide a head protection airbag.

本発明に係る頭部保護エアバッグでは、車両の窓の上縁側に折り畳まれて収納され、膨張用ガスの流入時に、窓の上縁側から下方に展開膨張して、窓の車内側を覆う構成の頭部保護エアバッグであって、
膨張用ガスを流入させて、車内側壁部と車外側壁部とを離すように膨張するガス流入部と、車内側・車外側壁部相互を結合させて、膨張用ガスを流入させない非流入部と、を備え、
ガス流入部が、
エアバッグの上縁側で、前後方向に沿って配置されるとともに、膨張用ガスを供給するためのインフレーターと接続される接続口部に連通したガス供給路部と、
ガス供給路部側の上部側に膨張用ガスの流入口を有し、エアバッグの下縁側まで延びるように形成されて、前後方向に並設される複数の並設セルと、
を備えて構成され、
非流入部が、
エアバッグの外周縁を形成する周縁部と、
エアバッグの下縁側における周縁部の下側縁部から連なって上方に延び、並設セルを区画する延設区画部と、
を備えて構成され、
エアバッグが、
前後に延設区画部を配置させ、かつ、下方への迅速な展開膨張を要求される並設セルとして、
迅速展開セルと、
迅速展開セルよりガス供給路部を流れる膨張用ガスの上流側として、迅速展開セルに隣接する上流側並設セルと、
ガス供給路部における膨張用ガスの下流端の下方の並設セルより膨張用ガスの上流側の並設セルとし、かつ、迅速展開セルよりガス供給路部を流れる膨張用ガスの下流側として、迅速展開セルに隣接する下流側並設セルと、
を備え、
迅速展開セルの前後の延設区画部の内の、ガス供給路部を流れる膨張用ガスの下流側に位置する下流側延設区画部が、下側縁部から上方に延びる縦部と、迅速展開セルの上端を覆うように、縦部の上部側からガス供給路部の下縁に沿わせるように屈曲させて配置される横部と、を備え、
迅速展開セルの前後の延設区画部の内の、ガス供給路部を流れる膨張用ガスの上流側に位置する上流側延設区画部が、下側縁部から上方に延びる上端を、下流側延設区画部の横部における縦部から離れた先端との間に、迅速展開セルにおける上部側の流入口を形成するように、配置させて、配設され、
迅速展開セルにおける上部側の流入口が、開口面を略上下方向に沿わせ、かつ、上流側並設セルの上部側で膨張用ガスの上流側に向けて、開口させていることを特徴とする。 The head protection airbag according to the present invention is configured to be folded and housed on the upper edge side of the vehicle window, and to expand and inflate downward from the upper edge side of the window when inflating gas flows to cover the vehicle interior side of the window The head protection airbag of
A gas inflow part that inflates to inflate an inflating gas so as to separate the inner side wall part and the outer side wall part from the vehicle, and a non-inflow part that does not allow the inflating gas to flow by coupling the inner and outer side wall parts to each other. And comprising
The gas inlet
On the upper edge side of the airbag, a gas supply path portion that is disposed along the front-rear direction and communicates with a connection port portion that is connected to an inflator for supplying an inflation gas;
A plurality of cells arranged in parallel in the front-rear direction, having an inflow port for inflation gas on the upper side of the gas supply path side, and extending to the lower edge side of the airbag;
Configured with
Non-inflow part
A peripheral portion forming an outer peripheral edge of the airbag;
An extended section that extends upward from the lower edge of the peripheral edge on the lower edge of the airbag, and divides the juxtaposed cells;
Configured with
Airbag
As a side-by-side cell in which the extended compartments are arranged in the front and rear, and a rapid expansion and expansion downward is required,
And the rapid deployment cell,
As an upstream side of the expansion gas flowing through the gas supply path from the rapid deployment cell, an upstream side-by-side cell adjacent to the rapid deployment cell;
As a juxtaposed cell upstream of the expansion gas from the juxtaposed cell below the downstream end of the expansion gas in the gas supply path, and as the downstream side of the expansion gas flowing through the gas supply path from the quick deployment cell, A downstream side-by-side cell adjacent to the rapid deployment cell;
With
Of the extended compartments before and after the rapid deployment cell, the downstream extended compartment located on the downstream side of the expansion gas flowing through the gas supply passage is a vertical portion extending upward from the lower edge, and A horizontal portion that is arranged to be bent along the lower edge of the gas supply path portion from the upper side of the vertical portion so as to cover the upper end of the expansion cell, and
Of the extended compartments before and after the rapid deployment cell, the upstream extended compartment located on the upstream side of the inflation gas flowing through the gas supply passage portion has the upper end extending upward from the lower edge, and the downstream side. Arranged so as to form an inflow port on the upper side in the rapid deployment cell between the distal end of the extending section and the vertical portion away from the vertical portion ,
The upper inflow port in the rapid deployment cell is characterized in that it opens along the opening surface substantially vertically and toward the upstream side of the expansion gas on the upper side of the upstream side-by-side cell. To do.

本発明に係る頭部保護エアバッグでは、車両の窓の上縁側に収納された状態で、インフレーターからの膨張用ガスが流入されると、膨張用ガスが、接続口部からガス供給路部を流れ、さらに、各並設セルに流れて、窓の車内側を覆うように、窓の上縁側から下方へ展開膨張することとなる。 In the head protection airbag according to the present invention, when the inflation gas from the inflator is flown in the state of being housed on the upper edge side of the vehicle window, the inflation gas passes through the gas supply path portion from the connection port portion. The flow further flows into each side-by-side cell, and expands and expands downward from the upper edge side of the window so as to cover the inside of the window.

そして、ガス供給路部を前後方向に沿って流れる膨張用ガスは、迅速展開セル付近において、迅速展開セルに隣接する膨張用ガスの上流側に位置する上流側並設セルの上方付近から、迅速展開セルの上方を経て、迅速展開セルに隣接する膨張用ガスの下流側に位置する下流側並設セルの上方付近へ、流れることとなる。 Then, the expansion gas flowing along the front-rear direction in the gas supply path portion is quickly admitted from the vicinity of the upstream side-by-side cell located upstream of the expansion gas adjacent to the rapid expansion cell in the vicinity of the rapid expansion cell. Through the upper side of the expansion cell, the gas flows to the vicinity of the upper side of the downstream side-by-side cell located on the downstream side of the expansion gas adjacent to the rapid expansion cell.

その際、迅速展開セルでは、膨張用ガスを流入させるための流入口が、下流側延設区画部における下側縁部から縦部を経て延びている横部を、ガス供給路部の下縁に沿わせて迅速展開セルの上端を覆うように配置させて、そして、横部における縦部から離れた先端と、上流側延設区画部における下側縁部から上方に延びた上端と、の間に開口させている。すなわち、迅速展開セルは、上部側のガスの流入口を、その開口面を略上下方向に沿わせ、かつ、上流側並設セルの上部側でガスの上流側に向けて、開口させている。 At that time, in the rapid deployment cell, the inflow port for allowing the inflating gas to flow in is connected to the lower edge of the gas supply path section from the lower edge of the downstream extending section through the vertical section. And arranged so as to cover the upper end of the quick deployment cell, and a tip that is separated from the vertical portion in the horizontal portion and an upper end that extends upward from the lower edge portion in the upstream extending partition portion. Open between them. That is, in the rapid deployment cell, the gas inlet on the upper side is opened along the opening surface thereof in a substantially vertical direction and toward the upstream side of the gas at the upper side of the upstream side-by-side cell. .

そのため、上流側並設セルの上方付近から、迅速展開セルの上方を経て、下流側並設セルの上方付近を流れる膨張用ガスは、上流側並設セルの上部の流入口から、上流側並設セル内へ流れようとするが、慣性力により、迅速展開セルの流入口へ流れ易くなる。そして、迅速展開セルの流入口から迅速展開セル内に流入した膨張用ガスは、迅速展開セルの下流側延設区画部の横部と縦部とに案内されるように、迅速展開セルの下端側に流れることとなる。さらに、迅速展開セルの下端では、上流側延設区画部、周縁部の下側縁部、及び、下流側延設区画部の縦部によって、閉塞されていることから、迅速展開セルの下端側へ流れる膨張用ガスにより、迅速展開セルが、迅速に展開して、厚く膨張を完了させることとなる。 For this reason, the expansion gas that flows near the upper side of the upstream side-by-side cell from the upper side of the upstream side-by-side cell passes through the upper side of the upstream side-by-side cell. Although it tends to flow into the installation cell, the inertial force makes it easy to flow into the inlet of the rapid deployment cell. Then, the lower end of the rapid deployment cell is arranged so that the expansion gas flowing into the rapid deployment cell from the inlet of the rapid deployment cell is guided to the horizontal and vertical portions of the downstream extending partition section of the rapid deployment cell. Will flow to the side. Furthermore, at the lower end of the rapid deployment cell, the lower end side of the rapid deployment cell is blocked by the upstream extending partition, the lower edge of the peripheral edge, and the vertical portion of the downstream extending partition. Due to the inflation gas flowing to the rapid deployment cell, the rapid deployment cell will rapidly expand and complete the expansion.

一方、迅速展開セルに隣接した上流側並設セルでは、その上流側並設セルの流入口から流入する膨張用ガスが、迅速展開セルの流入口へ流れて、上流側並設セルの下端側へ向かう量を少なくしてしまうことから、迅速展開セルより、厚く膨張を完了させる時点を遅らせてしまう。 On the other hand, in the upstream side-by-side cell adjacent to the rapid deployment cell, the inflation gas flowing in from the upstream side parallel cell inlet flows to the rapid deployment cell inflow side, and the lower end side of the upstream side parallel cell. Since the amount to go to is reduced, the point of completing the expansion thicker than the quick deployment cell is delayed.

そして、このような迅速展開セルが迅速に展開膨張する状態は、下流側延設区画部に横部を設けることなく、迅速展開セルの上端に、単に、ガス供給路部に連通する流入口を開口させた場合より、迅速に展開膨張する状態である。 And the state where such a rapid deployment cell rapidly expands and expands is simply provided with an inlet communicating with the gas supply passage at the upper end of the rapid deployment cell without providing a lateral portion in the downstream extending section. It is in a state where it expands and expands more quickly than when it is opened.

なお、迅速展開セルに隣接した下流側並設セルでは、ガス供給路部における膨張用ガスの下流端の下方の並設セルより膨張用ガスの上流側の並設セルとして、迅速展開セルより、ガス供給路部のガスの下流側であることから、迅速展開セルより、タイミングを遅らせて、膨張を完了させることとなる。 In addition, in the downstream side-by-side cell adjacent to the rapid deployment cell, as the side-by-side cell on the upstream side of the expansion gas from the side-by-side cell below the downstream end of the expansion gas in the gas supply path , from the rapid deployment cell, Since it is on the downstream side of the gas in the gas supply path section, the timing is delayed from the rapid deployment cell to complete the expansion.

したがって、本発明に係る頭部保護エアバッグでは、ガス供給路部の膨張用ガスの上流側から下流側までの間の所定の並設セル、すなわち、迅速展開セルを、迅速に展開させて厚く膨張させることができる。 Therefore, in the head protection airbag according to the present invention, a predetermined parallel cell between the upstream side and the downstream side of the inflation gas in the gas supply passage, that is, the quick deployment cell is quickly deployed and thickened. Can be inflated.

以下、本発明の一実施形態を図面に基づいて説明すると、図１・４に示すように、実施形態の頭部保護エアバッグ２０は、車両Ｖに搭載される頭部保護エアバッグ装置Ｍに使用されるものであり、下方へ展開して膨張を完了させた際に、車両Ｖの窓（サイドウィンド）Ｗ１・Ｗ２を覆い可能に、窓Ｗ１・Ｗ２の上縁側のフロントピラー部ＦＰからルーフサイドレール部ＲＲのリヤピラー部ＲＰの上方付近までの範囲に、折り畳まれて収納されている。なお、この車両Ｖは、フロントピラー部ＦＰとリヤピラー部ＲＰとの間に、略上下方向に沿って配設されるセンターピラー部ＣＰを配設させて構成され、展開膨張完了時のエアバッグ２０は、窓Ｗ１・Ｗ２とともに、センターピラー部ＣＰのピラーガーニッシュ５の車内側も、覆うように、構成されている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 4, the head protection airbag 20 of the embodiment is applied to a head protection airbag device M mounted on a vehicle V. The roof is opened from the front pillar portion FP on the upper edge side of the windows W1 and W2 so that the windows (side windows) W1 and W2 of the vehicle V can be covered when the expansion is completed by expanding downward. The side rail portion RR is folded and stored in a range up to the vicinity of the upper portion of the rear pillar portion RP. The vehicle V is configured by disposing a center pillar portion CP disposed substantially along the vertical direction between the front pillar portion FP and the rear pillar portion RP. Is configured so as to cover the inside of the pillar garnish 5 of the center pillar portion CP together with the windows W1 and W2.

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、エアバッグ２０に膨張用ガスを供給するインフレーター１０、取付ブラケット１１・１５、及び、取付ボルト１２・１６、を備えて構成されている。折り畳まれたエアバッグ２０とインフレーター１０とは、車両Ｖへの搭載時に、車内側をエアバッグカバー１８に覆われて収納されている。エアバッグカバー１８は、実施形態の場合、フロントピラー部ＦＰの車内側を覆うフロントピラーガーニッシュ３の下縁３ａと、ルーフサイドレール部ＲＲの車内側を覆うルーフヘッドライニング４の下縁４ａと、から構成されている。 As shown in FIG. 1, the head protecting airbag device M includes an airbag 20, an inflator 10 that supplies inflation gas to the airbag 20, mounting brackets 11 and 15, and mounting bolts 12 and 16. It is configured. The folded airbag 20 and the inflator 10 are housed and covered with the airbag cover 18 when the vehicle is mounted on the vehicle V. In the embodiment, the airbag cover 18 includes a lower edge 3a of the front pillar garnish 3 that covers the vehicle interior side of the front pillar portion FP, a lower edge 4a of the roof head lining 4 that covers the vehicle interior side of the roof side rail portion RR, It is composed of

フロントピラーガーニッシュ３やルーフヘッドライニング４は、合成樹脂製として、図示しない取付手段によって、フロントピラー部ＦＰやルーフサイドレール部ＲＲにおけるボディ１側の部材であるインナパネル２の車内側に、取り付けられている。そして、これらの下縁３ａ・４ａから構成されるエアバッグカバー１８は、展開膨張時のエアバッグ２０を突出可能に、エアバッグ２０に押されて、下端３ａ・４ａ側を車内側に開くように、構成されている。 The front pillar garnish 3 and the roof head lining 4 are made of synthetic resin and are attached to the inner side of the inner panel 2 that is a member on the body 1 side of the front pillar portion FP and the roof side rail portion RR by attachment means (not shown). ing. The airbag cover 18 composed of the lower edges 3a and 4a is pushed by the airbag 20 so that the airbag 20 can be protruded when deployed and inflated so that the lower ends 3a and 4a are opened to the inside of the vehicle. It is configured.

インフレーター１０は、略円柱状とされて、先端（前端）側に、膨張用ガスを吐出可能な図示しないガス吐出口が、配設されている。そして、このインフレーター１０は、ガス吐出口付近を含めた先端付近をエアバッグ２０の接続口部２６に挿入させ、接続口部２６の後端付近に外装されるクランプ１３を利用して、エアバッグ２０の接続口部２６に連結されている。また、インフレーター１０は、インフレーター１０を保持する取付ブラケット１１と、取付ブラケット１１をボディ１側のインナパネル２に固定するための取付ボルト１２と、を利用して、インナパネル２に取り付けられている。 The inflator 10 has a substantially columnar shape, and a gas discharge port (not shown) capable of discharging an inflating gas is disposed on the tip (front end) side. Then, the inflator 10 inserts the vicinity of the tip including the vicinity of the gas discharge port into the connection port portion 26 of the airbag 20, and uses the clamp 13 that is externally installed near the rear end of the connection port portion 26. 20 connection ports 26 are connected. The inflator 10 is attached to the inner panel 2 using a mounting bracket 11 that holds the inflator 10 and a mounting bolt 12 that fixes the mounting bracket 11 to the inner panel 2 on the body 1 side. .

なお、このインフレーター１０の車両Ｖへの搭載は、インフレーター１０とエアバッグ２０とを組み付けた状態のエアバッグ組付体として、行なわれる。 The inflator 10 is mounted on the vehicle V as an airbag assembly in which the inflator 10 and the airbag 20 are assembled.

エアバッグ２０は、図２・３に示すように、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形成され、膨張用ガスＧを流入させて車内側壁部２１ａと車外側壁部２１ｂとを離すように膨張するガス流入部２１と、壁部２１ａ・２１ｂ相互を結合させるように形成されて、ガスＧを流入させない非流入部３６と、を備えて構成されている。 As shown in FIGS. 2 and 3, the airbag 20 is formed by bag weaving using polyamide yarn, polyester yarn, or the like, and flows in the inflation gas G to separate the vehicle interior side wall portion 21 a and the vehicle outer side wall portion 21 b. Thus, the gas inflow part 21 which expand | swells and the non-inflow part 36 which is formed so that wall part 21a * 21b may be combined and does not allow gas G to flow in are comprised.

ガス流入部２１は、展開膨張完了時のエアバッグ２０の窓Ｗ１・Ｗ２を覆う保護エリアとなる保護膨張部２２、ガス供給路部２５、及び、接続口部２６、を備えて構成され、非流入部３６は、周縁部３７、取付部３８、板状部３９、及び、区画部４０、を備えて構成されている。 The gas inflow portion 21 includes a protective inflation portion 22, which serves as a protection area that covers the windows W1 and W2 of the airbag 20 when deployment and inflation are completed, a gas supply passage portion 25, and a connection port portion 26. The inflow part 36 includes a peripheral edge part 37, an attachment part 38, a plate-like part 39, and a partition part 40.

ガス流入部２１の保護膨張部２２は、エアバッグ２０の展開膨張完了時に、前席の側方の窓Ｗ１を覆う前保護部２３と、後席の側方の窓Ｗ２を覆う後保護部２４と、を備えている。また、ガス供給路部２５は、エアバッグ２０の上縁２０ａ側で前後方向に沿って延びて、前保護部２３と後保護部２４との上方を連結するように、配置されている。さらに、接続口部２６は、ガス供給路部２５の前後方向の端部、実施形態の場合には、後端、に配設され、インフレーター１０からの膨張用ガスＧを、ガス供給路部２５の後端側から流入させて、ガス供給路部２５の前端側に流すことができるように、円筒状に形成されている。 The protective inflating portion 22 of the gas inflow portion 21 includes a front protecting portion 23 that covers the side window W1 of the front seat and a rear protecting portion 24 that covers the side window W2 of the rear seat when the airbag 20 has been deployed and inflated. And. Further, the gas supply path portion 25 extends along the front-rear direction on the upper edge 20 a side of the airbag 20 and is disposed so as to connect the front protection portion 23 and the rear protection portion 24. Further, the connection port portion 26 is arranged at the end portion in the front-rear direction of the gas supply passage portion 25, in the case of the embodiment, the rear end, and the expansion gas G from the inflator 10 is supplied to the gas supply passage portion 25. It is formed in a cylindrical shape so that it can flow from the rear end side and flow to the front end side of the gas supply path portion 25.

そして、各保護部２３・２４には、膨張時のエアバッグ２０が、前後方向の幅寸法を狭め、また、厚さを規制して前後方向に延びる板形状を維持できるようにするために、区画部４０によって区画されて前後方向に並設される複数の並設セル２８が、配設されている。各並設セル２８は、ガス供給路側２５側の上部側に、膨張用ガスＧを流入させるための流入口２８ａを配設させている。ちなみに、前保護部２３では、四つの並設セル２８（２８Ａ・２８Ｂ・２８Ｃ・２８Ｄ）が配設され、後保護部２４では、二つの並設セル２８（２８Ｅ・２８Ｆ）が配設されている。 And in each protection part 23 and 24, in order to make the airbag 20 at the time of expansion | swelling narrow the width dimension of the front-back direction, and also can control the thickness and can maintain the plate shape extended in the front-back direction, A plurality of juxtaposed cells 28 that are partitioned by the partitioning section 40 and are juxtaposed in the front-rear direction are disposed. Each juxtaposed cell 28 is provided with an inlet 28a for allowing the expansion gas G to flow into the upper side on the gas supply path side 25 side. Incidentally, in the front protection part 23, four juxtaposed cells 28 (28A, 28B, 28C, 28D) are arranged, and in the rear protection part 24, two juxtaposed cells 28 (28E, 28F) are arranged. Yes.

なお、後保護部２４の並設セル２８Ｅ・２８Ｆ間に配置されている膨張部位は、補助セル３４であり、並設セル２８Ｅ・２８Ｆの下端相互を連通させている連通部３０から膨張用ガスＧを流入させて膨張することとなる。この連通部３０は、さらに前方側にも延びて、前保護部２３の後端側の並設セル２８Ｄの下端にも連通されている。 In addition, the expansion | swelling site | part arrange | positioned between the juxtaposed cells 28E and 28F of the back protection part 24 is the auxiliary cell 34, and the gas for expansion | swelling from the communication part 30 which has made the lower end of the juxtaposed cells 28E and 28F connect each other. G will flow in and expand. The communication part 30 further extends to the front side and communicates with the lower end of the side-by-side cell 28 </ b> D on the rear end side of the front protection part 23.

ちなみに、補助セル３４は、エアバッグ２０の展開膨張時、前後の並設セル２８Ｅ・２８Ｆが下方へ展開膨張する当初、セル２８Ｅ・２８Ｆの展開に引張られて、薄い状態で展開し、そして、展開完了後、セル２８Ｅ・２８Ｆの下端の連通部３０側から膨張用ガスＧを流入させて、厚く膨張することとなることから、エアバッグ２０の展開当初に、狭くなっているスペースに挿入させ、そして、厚く膨張させて保護エリアを形成する場合に、好適な部位となる。 By the way, when the airbag 20 is deployed and inflated, the auxiliary cell 34 is initially stretched in the downward direction when the front and rear cells 28E and 28F are deployed and inflated downward, and deployed in a thin state. After the deployment is completed, since the inflation gas G flows in from the communication portion 30 side at the lower end of the cells 28E and 28F and is inflated thickly, the airbag 20 is inserted into a narrow space at the beginning of deployment. And it becomes a suitable site | part when expanding thickly and forming a protection area.

そして、実施形態の場合、前方側から三番目の並設セル２８Ｃを、迅速に展開膨張を完了させるための迅速展開セル３２とし、前方側から四番目の並設セル２８Ｄを、迅速展開セル３２より、ガス供給路部２５を流れる膨張用ガスＧの上流側として、迅速展開セル３２に隣接する上流側並設セル２９とし、さらに、ガス供給路部２５における膨張用ガスＧの下流端の下方の並設セル２８Ａより膨張用ガスＧの上流側となる前方側から二番目の並設セル２８Ｂを、迅速展開セル３２より、ガス供給路部２５を流れる膨張用ガスＧの下流側として、迅速展開セル３２に隣接する下流側並設セル３１としている。 In the case of the embodiment, the third juxtaposed cell 28C from the front side is used as the quick deployment cell 32 for completing the rapid expansion and expansion, and the fourth juxtaposed cell 28D from the front side is used as the quick deployment cell 32. more, as the upstream side of inflation gas G flowing through the gas supply path portion 25, the upstream side juxtaposed cells 29 you adjacent to rapid deployment cell 32, further downstream of the inflation gas G in the gas supply path portion 25 The second side-by-side cell 28B from the front side which is the upstream side of the expansion gas G from the side-by-side cell 28A below the end, and the downstream side of the expansion gas G flowing from the quick deployment cell 32 through the gas supply path 25 as has been the downstream side juxtaposed cells 31 you adjacent to rapid deployment cell 32.

非流入部３６の周縁部３７は、ガス流入部２１の外周縁に配置されている。板状部３９は、エアバッグ２０の前端側に配置される帯状として、エアバッグ２０の前端をフロントピラー部ＦＰの下部に連結させるために配設されている。実施形態の場合、板状部３９は、周縁部３７の前側縁部３７ｃに縫合されて、配設されている。 The peripheral edge 37 of the non-inflow portion 36 is disposed on the outer peripheral edge of the gas inflow portion 21. The plate-like portion 39 is provided as a belt-like shape disposed on the front end side of the airbag 20 in order to connect the front end of the airbag 20 to the lower portion of the front pillar portion FP. In the case of the embodiment, the plate-like portion 39 is sewn to the front edge portion 37 c of the peripheral edge portion 37 and disposed.

また、取付部３８は、周縁部３７の上側縁部３７ａから上方に突出するように、複数配設されるとともに、板状部３９の前端にも配設されて、エアバッグ２０をインナパネル２にボルト１６止めするための取付孔３８ａを備えて、構成されている。各取付部３８は、当板としての取付ブラケット１５が取り付けられて、ブラケット１５と共に、インナパネル２にボルト１６止めされることとなる。 A plurality of attachment portions 38 are disposed so as to protrude upward from the upper edge portion 37 a of the peripheral edge portion 37, and are also disposed at the front end of the plate-like portion 39, so that the airbag 20 is connected to the inner panel 2. A mounting hole 38a for fastening the bolt 16 is provided. Each mounting portion 38 is attached with a mounting bracket 15 as a contact plate, and is bolted to the inner panel 2 with the bracket 15 together with the bracket 15.

区画部４０は、前後方向に沿って並設された並設セル２８（２８Ａ・２８Ｂ・２８Ｃ・２８Ｄ・２８Ｅ・２８Ｆ）を相互に区画するために配設され、実施形態の場合、幅広区画部４１、逆Ｕ字状区画部４２、及び、延設区画部４３の三種類から構成されている。 The partition section 40 is disposed to partition the juxtaposed cells 28 (28A, 28B, 28C, 28D, 28E, and 28F) that are juxtaposed along the front-rear direction. In the case of the embodiment, the wide section section is provided. 41, an inverted U-shaped partition part 42, and an extended partition part 43.

幅広区画部４１は、並設セル２８Ｄ（上流側並設セル２９）と並設セル２８Ｅとを区画するように配設されている。そして、この幅広区画部４１は、ガス供給路部２５と連通部３０との間で、かつ、セル２８Ｄ・２８Ｅとの間に配置されており、周縁部３７から離れた状態で、配設されている。 The wide partition portion 41 is disposed so as to partition the juxtaposed cell 28D (upstream juxtaposed cell 29) and the juxtaposed cell 28E. The wide partition portion 41 is disposed between the gas supply path portion 25 and the communication portion 30 and between the cells 28D and 28E, and is disposed in a state of being separated from the peripheral edge portion 37. ing.

逆Ｕ字状区画部４２も、周縁部３７から離れた状態としてガス供給路部２５と連通部３０との間に配設され、そして、並設セル２８Ｅと並設セル２８Ｆとを区画するように配設されている。この逆Ｕ字状区画部４２は、補助セル３４を囲むように、逆Ｕ字状に配設されている。 The inverted U-shaped partition part 42 is also disposed between the gas supply path part 25 and the communication part 30 as being separated from the peripheral part 37, and partitions the side-by-side cell 28E and the side-by-side cell 28F. It is arranged. The inverted U-shaped partition portion 42 is disposed in an inverted U shape so as to surround the auxiliary cell 34.

延設区画部４３は、前部側の並設セル２８Ａ・２８Ｂ間、並設セル２８Ｂ・２８Ｃ間、及び、並設セル２８Ｃ・２８Ｄ間、の三箇所に配設され、それぞれ、周縁部３７の下側縁部３７ｂから上方に延びるように、配設されている。さらに、迅速展開セル３２の前後の延設区画部４３に関して、ガス供給路部２５を流れる膨張用ガスＧの上流側となる区画部が、上流側延設区画部４４を構成し、ガス供給路部２５を流れる膨張用ガスＧの下流側となる区画部が、下流側延設区画部４５を構成している。 The extending partition parts 43 are arranged at three positions, between the side-by-side cells 28A and 28B, between the side-by-side cells 28B and 28C, and between the side-by-side cells 28C and 28D. It arrange | positions so that it may extend upwards from the lower side edge part 37b. Further, with respect to the extended partition 43 before and after the rapid deployment cell 32, the partition on the upstream side of the expansion gas G flowing through the gas supply path 25 constitutes the upstream extended partition 44, and the gas supply path A partition section on the downstream side of the expansion gas G flowing through the section 25 constitutes a downstream extending partition section 45.

そして、下流側延設区画部４５は、周縁部３７の下側縁部３７ｂから上方に延びる縦部４６と、迅速展開セル３２の上端を覆うように、縦部４６の上部側からガス供給路部２５の下縁に沿わせるように屈曲させて配置される横部４７と、を備えて構成されている。 Further, the downstream extending partitioning portion 45 has a gas supply path from the upper side of the vertical portion 46 so as to cover the vertical portion 46 extending upward from the lower edge portion 37b of the peripheral edge portion 37 and the upper end of the quick deployment cell 32. And a lateral portion 47 arranged to be bent along the lower edge of the portion 25.

また、上流側延設区画部４４は、周縁部３７の下側縁部３７ｂから直線状に上方に延びる上端４４ａを、下流側延設区画部４５の横部４７における縦部４６から離れた後方側の先端４７ａとの間に、流入口３２ａを形成するように、先端４７ａから離れた先端４７ａの直下に配置させて、配設されている。 Further, the upstream extending partition part 44 has an upper end 44 a extending linearly upward from the lower edge part 37 b of the peripheral edge part 37, and a rear part away from the vertical part 46 in the lateral part 47 of the downstream extending partition part 45. Between the front end 47a on the side, an inflow port 32a is formed so as to be disposed immediately below the front end 47a away from the front end 47a.

つぎに、頭部保護エアバッグ装置Ｍの車両Ｖへ搭載する工程の概略を説明すると、エアバッグ２０を非膨張状態の平らに展開した状態から、上縁２０ａと平行な折目Ｃ（図２参照）を付けて、下縁２０ｂ側が上縁２０ａ側に接近するように略上下方向に折り重ねる蛇腹折りにより、折り畳み、その後、エアバッグ２０の周囲に、破断可能な図示しないラッピング材を巻き付ける。さらに、各取付部３８を引き出して、所定の取付ブラケット１５を取り付けるとともに、接続口部２６に、取付ブラケット１１を取付済みのインフレーター１０を挿入して、クランプ１３により、接続口部２６とインフレーター１０とを連結して、エアバッグ組付体を形成する。そして、各取付ブラケット１１・１５を、インナパネル２の所定の位置に配置させてボルト１２・１４止めすれば、エアバッグ組付体を車両Ｖに搭載することができる。 Next, the outline of the process of mounting the head protection airbag device M on the vehicle V will be described. From the state in which the airbag 20 is flattened in a non-inflated state, the crease C parallel to the upper edge 20a (FIG. 2). The wrapping material (not shown) that can be broken is wound around the airbag 20 by folding the bellows so that the lower edge 20b approaches the upper edge 20a. Further, each attachment portion 38 is pulled out to attach a predetermined attachment bracket 15, and the inflator 10 with the attachment bracket 11 already attached is inserted into the connection port portion 26, and the connection port portion 26 and the inflator 10 are inserted by the clamp 13. To form an airbag assembly. And if each mounting bracket 11 * 15 is arrange | positioned in the predetermined | prescribed position of the inner panel 2, and it fastens with bolts 12 * 14, an airbag assembly | attachment body can be mounted in the vehicle V. FIG.

その後、インフレーター１０に、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結線させて、フロントピラーガーニッシュ３やルーフヘッドライニング４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５やリヤピラーガーニッシュ６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。 Thereafter, lead wires (not shown) extending from the control device for operating the inflator are connected to the inflator 10, the front pillar garnish 3 and the roof head lining 4 are attached to the inner panel 2 on the body 1 side, and the pillar garnish 5 The head protection airbag device M can be mounted on the vehicle V by attaching the rear pillar garnish 6 to the inner panel 2 on the body 1 side.

そして、車両Ｖへの搭載後、頭部保護エアバッグ装置Ｍのインフレーター１０が作動すると、インフレーター１０が膨張用ガスＧを発生させ、エアバッグ２０に、膨張用ガスＧを流入させることとなる。 When the inflator 10 of the head protection airbag device M is activated after being mounted on the vehicle V, the inflator 10 generates the inflation gas G and causes the inflation gas G to flow into the airbag 20.

すると、窓Ｗ１・Ｗ２の上縁側に収納されていた実施形態の頭部保護エアバッグ２０は、インフレーター１０からの膨張用ガスＧが流入され、膨張用ガスＧが、接続口部２６からガス供給路部２５を流れ、さらに、各並設セル２８、連通部３０、及び、補助セル３４に流れることから、窓Ｗ１・Ｗ２やピラー部ＣＰの車内側を覆うように、窓Ｗ１・Ｗ２の上縁側から下方へ展開膨張することとなる（図１・２・４参照）。 Then, in the head protection airbag 20 of the embodiment housed on the upper edge side of the windows W1 and W2, the inflation gas G from the inflator 10 is introduced, and the inflation gas G is supplied from the connection port 26 as a gas. Since it flows through the road portion 25 and further flows to each side-by-side cell 28, the communication portion 30, and the auxiliary cell 34, the windows W1 and W2 are placed over the windows W1 and W2 and the pillar portion CP so as to cover the inside of the vehicle. It expands and expands downward from the edge side (see FIGS. 1, 2, and 4).

この時、図２に示すように、ガス供給路部２５を前後方向に沿って前方側へ流れる膨張用ガスＧは、迅速展開セル３２付近において、迅速展開セル３２に隣接する上流側並設セル２９の上方付近から、迅速展開セル３２の上方を経て、迅速展開セル３２に隣接する下流側並設セル３１の上方付近へ、流れることとなる。 At this time, as shown in FIG. 2, the expansion gas G flowing forward along the front-rear direction in the gas supply path 25 is located in the vicinity of the rapid deployment cell 32 and is arranged in the upstream side-by-side cell adjacent to the rapid deployment cell 32. It flows from the vicinity of the upper portion 29 to the vicinity of the upper portion of the downstream side-by-side cell 31 adjacent to the quick deployment cell 32 through the rapid deployment cell 32.

その際、迅速展開セル３２では、膨張用ガスＧを流入させる流入口３２ａが、下流側延設区画部４５における下側縁部３７ｂから縦部４６を経て延びている横部４７を、ガス供給路部２５の下縁に沿わせて迅速展開セル３２の上端を覆うように配置させて、そして、その先端４７ａと、上流側延設区画部４４における下側縁部３７ｂから上方に延びた上端４４ａと、の間に開口させている。すなわち、迅速展開セル３２は、上部側のガスの流入口３２ａを、その開口面を上下方向に沿わせ、かつ、上流側並設セル２９の上部側でガスＧの上流側に向けて、開口させている。 At that time, in the rapid deployment cell 32, the inflow port 32a through which the expansion gas G flows is supplied to the horizontal portion 47 extending from the lower edge portion 37b of the downstream extending partition portion 45 through the vertical portion 46. It arrange | positions so that the upper end of the rapid expansion | deployment cell 32 may be covered along the lower edge of the road part 25, and the upper end extended upwards from the front-end | tip 47a and the lower edge part 37b in the upstream extension division part 44 44a. That is, the rapid deployment cell 32 opens the gas inlet 32a on the upper side so that its opening surface extends along the vertical direction and toward the upstream side of the gas G on the upper side of the upstream side-by-side cell 29. I am letting.

そのため、上流側並設セル２９の上方付近から、迅速展開セル３２の上方を経て、下流側並設セル３１の上方付近を流れる膨張用ガスＧは、上流側並設セル２９の上部の流入口２９ａから、上流側並設セル２９内へ流れようとするが、慣性力により、迅速展開セル３２の流入口３２ａへ流れ易くなる。そして、迅速展開セル３２の流入口３２ａから迅速展開セル３２内に流入した膨張用ガスＧは、迅速展開セル３２の下流側延設区画部４５の横部４７と縦部４６とに案内されるように、迅速展開セル３２の下端側に流れることとなる。さらに、迅速展開セル３２の下端では、上流側延設区画部４４、周縁部３７の下側縁部３７ｂ、及び、下流側延設区画部４５の縦部４６によって、閉塞されていることから、迅速展開セル３２の下端側へ流れる膨張用ガスＧにより、迅速展開セル３２が、迅速に展開して、厚く膨張を完了させることとなる。 For this reason, the expansion gas G flowing near the upper side of the upstream side-by-side cell 29 from the vicinity of the upstream side-by-side cell 29, above the rapid deployment cell 32, and near the upper side of the downstream side-by-side cell 31 Although it tends to flow into the upstream side-by-side cell 29 from 29a, it tends to flow to the inlet 32a of the quick deployment cell 32 by the inertial force. Then, the expansion gas G that has flowed into the rapid deployment cell 32 from the inlet 32a of the rapid deployment cell 32 is guided to the horizontal portion 47 and the vertical portion 46 of the downstream extending partition 45 of the rapid deployment cell 32. Thus, it will flow to the lower end side of the quick deployment cell 32. Furthermore, at the lower end of the quick deployment cell 32, it is blocked by the upstream extending partition 44, the lower edge 37b of the peripheral edge 37, and the vertical portion 46 of the downstream extending partition 45, Due to the expansion gas G flowing toward the lower end side of the rapid deployment cell 32, the rapid deployment cell 32 is rapidly deployed and the expansion is completed thickly.

一方、迅速展開セル３２に隣接した上流側並設セル２９では、その上流側並設セル２９の流入口２９ａから流入する膨張用ガスＧが、迅速展開セル３２の流入口３２ａへ流れて、上流側並設セル２９の下端側へ向かう量を少なくしてしまうことから、迅速展開セル３２より、厚く膨張を完了させる時点を遅らせてしまう。 On the other hand, in the upstream side-by-side cell 29 adjacent to the rapid deployment cell 32, the expansion gas G flowing in from the inlet 29a of the upstream side-by-side cell 29 flows to the inlet 32a of the rapid deployment cell 32 and flows upstream. Since the amount toward the lower end side of the side-by-side cells 29 is reduced, the time point for completing the expansion thicker than the quick deployment cell 32 is delayed.

そして、このような迅速展開セル３２が迅速に展開膨張する状態は、下流側延設区画部４５に横部４７を設けることなく、迅速展開セル３２の上端に、単に、ガス供給路部２５に連通する流入口を開口させた場合より、迅速に展開膨張する状態である。 Then, such a state where the rapid deployment cell 32 rapidly expands and expands is simply provided at the upper end of the rapid deployment cell 32 without being provided with the lateral portion 47 in the downstream extending section 45, and simply in the gas supply path portion 25. It is in a state where it expands and expands more quickly than in the case where the communicating inlet is opened.

したがって、実施形態の頭部保護エアバッグ２０では、ガス供給路部２５のガスＧの上流側から下流側までの間の所定の並設セル２８Ｃ、すなわち、迅速展開セル３２を、迅速に展開させて厚く膨張させることができる。 Therefore, in the head protection airbag 20 of the embodiment, the predetermined juxtaposed cell 28C between the upstream side and the downstream side of the gas G in the gas supply path portion 25, that is, the rapid deployment cell 32 is rapidly deployed. Can be expanded thickly.

ちなみに、迅速展開セル３２に隣接した下流側並設セル３１では、そのセル３１がガス供給路部２５のガスの下流端に配置されているセル２８Ａとしている場合を除けば、迅速展開セル３２より、ガス供給路部２５のガスの下流側であることから、迅速展開セル３２より、タイミングを遅らせて、膨張を完了させることとなる。 By the way, in the downstream side-by-side cell 31 adjacent to the rapid deployment cell 32, except for the case where the cell 31 is a cell 28 </ b> A disposed at the downstream end of the gas in the gas supply path 25, Since it is downstream of the gas in the gas supply path 25, the timing is delayed from the rapid deployment cell 32 to complete the expansion.

但し、下流側並設セル３１がガス供給路部２６の下流端のセル２８Ａとしている場合には、周縁部３７の上下方向の前側縁部３７ｃによって、セル２８Ａ内に流入するガス量が多くなって、セル３２より、迅速に展開膨張する場合があり得ることから、迅速展開セル３２は、実施形態のように、隣接する下流側並設セル３１を、ガス供給路部２５におけるガスＧの下流端の下方に配置させないエリアに、すなわち、ガス供給路部２５における膨張用ガスＧの下流端の下方の並設セル２８Ａより膨張用ガスＧの上流側となるエリアに、配設することが望ましい。 However, when the downstream side cell 31 is the cell 28A at the downstream end of the gas supply path portion 26, the amount of gas flowing into the cell 28A is increased by the front side edge portion 37c in the vertical direction of the peripheral edge portion 37. Te, from the cell 32, since there may be a case of rapidly expanded and inflated rapidly expanded cell 32, as in the embodiment, the downstream-side juxtaposed cells 31 adjacent, downstream of the gas G in the gas supply path portion 25 It is desirable to dispose in an area that is not disposed below the end, that is, in an area that is upstream of the expansion gas G from the side-by-side cell 28A below the downstream end of the expansion gas G in the gas supply passage 25. .

なお、ガス供給路部２５内には、図５に示すエアバッグ２０Ａのように、膨張用ガスＧの熱の影響を低減できるように、エアバッグ２０と同じ材料等の布材からなる筒状のインナチューブ４９を、設けても良い。このインナチューブ４９には、セル２８Ｅ・２８Ｆの流入口２８ａの位置とチューブ４９の前端とに、ガス流通孔４９ａが形成されている。そして、このインナチューブ４９は、接続口部２６の内周面から幅広区画部４１の上方付近まで、配設されている。 In addition, in the gas supply path portion 25, as in the airbag 20A shown in FIG. 5, a cylindrical shape made of a cloth material such as the same material as the airbag 20 so as to reduce the influence of the heat of the inflation gas G. The inner tube 49 may be provided. Gas flow holes 49 a are formed in the inner tube 49 at the positions of the inlets 28 a of the cells 28 E and 28 F and the front end of the tube 49. The inner tube 49 is disposed from the inner peripheral surface of the connection port portion 26 to the vicinity of the upper portion of the wide partition portion 41.

また、実施形態では、接続口部２６をガス供給路部２５の後端に配設させた場合を示したが、エアバッグ２０の前後を入れ替えて、ガス供給路部２５の前端側に、接続口部２６を設けても良い。さらに、膨張用ガスがガス供給路部内を前後方向に沿って流れれば、接続口部をガス供給路部の前後方向の中間付近に配置させ、ガス供給路部内のガスの流れる方向に沿って、複数の並設セルが配設されていれば、本発明を適用することができる。 Moreover, although the case where the connection port part 26 was arrange | positioned in the rear end of the gas supply path part 25 was shown in embodiment, the front and back of the airbag 20 were replaced and it connected to the front end side of the gas supply path part 25 A mouth portion 26 may be provided. Further, if the expansion gas flows in the gas supply path along the front-rear direction, the connection port is arranged near the middle of the gas supply path in the front-rear direction, and along the gas flow direction in the gas supply path. The present invention can be applied if a plurality of juxtaposed cells are provided.

さらに、実施形態の頭部保護エアバッグ２０では、迅速展開セル３２を、一つだけ配設した場合を示したが、迅速展開セルは、一つの頭部保護エアバッグに、複数配設させてもよい。 Furthermore, in the head protection airbag 20 of the embodiment, the case where only one quick deployment cell 32 is arranged is shown, but a plurality of quick deployment cells are arranged in one head protection airbag. Also good.

本発明の一実施形態の頭部保護エアバッグが使用されたエアバッグ装置の車両への搭載状態を示す車内側から見た図である。It is the figure seen from the vehicle inner side which shows the mounting state to the vehicle of the airbag apparatus in which the head protection airbag of one Embodiment of this invention was used. 実施形態のエアバッグの展開図である。It is an expanded view of the airbag of an embodiment. 図２のIII−III部位の概略断面図である。It is a schematic sectional drawing of the III-III site | part of FIG. 実施形態の頭部保護エアバッグ装置の作動完了時を示す車内側から見た図である。It is the figure seen from the vehicle inner side which shows the time of completion | finish of operation | movement of the head protection airbag apparatus of embodiment. 実施形態のエアバッグの変形例を示す展開図である。It is an expanded view which shows the modification of the airbag of embodiment.

Explanation of symbols

２０・２０Ａ…頭部保護エアバッグ、
２１…ガス流入部、
２１ａ…車内側壁部、
２１ｂ…車外側壁部、
２５…ガス供給路部、
２６…接続口部、
２８（２８Ａ・２８Ｂ・２８Ｃ・２８Ｄ・２８Ｅ・２８Ｆ）…並設セル、
２８ａ・２９ａ・３２ａ…流入口、
２９…上流側並設セル、
３１…下流側並設セル、
３２…迅速展開セル、
３６…非流入部、
３７…周縁部、
３７ｂ…下側縁部、
４３…延設区画部、
４４…上流側延設区画部、
４４ａ…上端、
４５…下流側延設区画部、
４６…縦部、
４７…横部、
４７ａ…先端、
Ｇ…膨張用ガス、
Ｗ１・Ｗ２…窓、
Ｖ…車両、
Ｍ…頭部保護エアバッグ装置。 20.20A ... Head protection airbag,
21 ... Gas inflow part,
21a ... the inner wall of the vehicle,
21b ... car outer wall part,
25 ... gas supply passage,
26: Connection port,
28 (28A, 28B, 28C, 28D, 28E, 28F) ... parallel cells,
28a, 29a, 32a ... Inlet,
29 ... Upstream side-by-side cell,
31 ... Downstream side-by-side cell,
32 ... Rapid deployment cell,
36 ... non-inflow part,
37 ... peripheral edge,
37b ... lower edge,
43 ... Extension section,
44 ... upstream extending section,
44a ... upper end,
45 ... downstream extending section,
46: Vertical section,
47 ... Horizontal,
47a ... tip,
G ... expansion gas,
W1, W2 ... windows,
V ... Vehicle,
M: Head protection airbag device.

Claims

A head protection airbag configured to be folded and housed on the upper edge side of a vehicle window and to be expanded and inflated downward from the upper edge side of the window to cover the inside of the window when inflating gas flows. ,
A non-inflow that does not allow the inflation gas to flow by connecting the gas inflow portion that inflates so as to separate the vehicle inner side wall portion and the vehicle outer side wall portion from each other and the vehicle inner and outer wall portions. And comprising
The gas inflow part is
On the upper edge side of the airbag, a gas supply path portion arranged along the front-rear direction and communicated with a connection port portion connected to an inflator for supplying an inflation gas;
A plurality of cells arranged in parallel in the front-rear direction, having an inflow port for inflation gas on the upper side of the gas supply path, and extending to the lower edge side of the airbag;
Configured with
The non-inflow portion is
A peripheral portion forming an outer peripheral edge of the airbag;
An extending partition that extends upward from the lower edge of the peripheral edge on the lower edge of the airbag, and divides the juxtaposed cells;
Configured with
The airbag is
As a side-by-side cell in which the extended compartments are arranged on the front and back, and a rapid expansion and expansion downward is required,
And the rapid deployment cell,
As an upstream side of the expansion gas flowing through the gas supply path from the rapid deployment cell, an upstream side-by-side cell adjacent to the rapid deployment cell;
A parallel cell on the upstream side of the expansion gas from the parallel cell below the downstream end of the expansion gas in the gas supply path, and downstream of the expansion gas flowing through the gas supply path from the quick deployment cell As a side, a downstream side-by-side cell adjacent to the rapid deployment cell;
With
Of the extended compartments before and after the rapid deployment cell, a downstream extended compartment located on the downstream side of the expansion gas flowing through the gas supply passage portion extends vertically from the lower edge. And a lateral part arranged to bend along the lower edge of the gas supply path part from the upper side of the vertical part so as to cover the upper end of the quick deployment cell,
An upper end extending upward from the lower edge of the upstream extended partition located upstream of the expansion gas flowing through the gas supply path portion of the extended partition before and after the quick deployment cell Are arranged so as to form the inflow port on the upper side in the quick deployment cell between the downstream side extending partition portion and the distal end away from the vertical portion .
The inflow port on the upper side in the rapid deployment cell opens along the opening surface in a substantially vertical direction and toward the upstream side of the inflation gas on the upper side of the upstream side-by-side cell . Head protection airbag characterized by.