JP2019026045A - Air bag - Google Patents

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JP2019026045A
JP2019026045A JP2017146736A JP2017146736A JP2019026045A JP 2019026045 A JP2019026045 A JP 2019026045A JP 2017146736 A JP2017146736 A JP 2017146736A JP 2017146736 A JP2017146736 A JP 2017146736A JP 2019026045 A JP2019026045 A JP 2019026045A
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airbag
partition wall
partial
chamber
inner peripheral
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JP6783434B2 (en
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誠 尾関
Makoto Ozeki
誠 尾関
崇至 佐々木
Takashi Sasaki
崇至 佐々木
泰三 末光
Taizo Suemitsu
泰三 末光
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

To provide an air bag capable of securing a high back-flow suppressing function as a partition wall between an upstream-side chamber and a downstream-side chamber gets stabilized.SOLUTION: A partition wall 44 is arranged between an upstream-side chamber 41 on an upstream side of a flow of expansion gas G and a downstream-side chamber 42 on a downstream side. An outer peripheral edge 45 of the partition wall comprises: a continuous coupling part 47 coupled continuously to an inner peripheral surface of a border region 43 between the upstream-side chamber and downstream-side chamber; a partial coupling part 49 coupled partially to an inner peripheral surface of the border region 43; and a fin part 58 at a periphery of the partial coupling part 49. The fin part is made to separate from an inner peripheral surface 42a of the downstream-side chamber when the gas G of the downstream-side chamber out is to flow forward from the upstream-side chamber, and thus forms a flow passage 55 for forward flow of the gas flowing through a region of non-coupling parts 53, 54 which are not coupled to an inner peripheral surface of the border region between the continuous coupling part and partial coupling part to allow the gas to flow forward, and is pressed against the inner peripheral surface 42a of the downstream-side chamber when the gas is to flow backward to close the flow passage 55, thereby suppressing the gas from flowing backward.SELECTED DRAWING: Figure 7

Description

本発明は、車両に搭載されるエアバッグ装置のエアバッグに関し、詳しくは、膨張用ガスの逆流を抑制可能な隔壁を有したエアバッグに関する。   The present invention relates to an airbag of an airbag device mounted on a vehicle, and more particularly, to an airbag having a partition wall that can suppress a backflow of inflation gas.

従来、逆流を抑制可能なエアバッグでは、インフレーターと接続される上流側室と乗員を受け止める下流側室とを、逆流抑制機構を備えた隔壁で区画するものが知られている（例えば、特許文献１参照）。この隔壁は、上流側室と下流側室とを区画する長方形の本体部位と、本体部位の左右両側における下流側室側の後方へ延びる側辺と、本体部位の下側における下流側室の側への後方へ延びる下片と、を備えて構成され、左右の側辺を含めた上縁側の全域と、両側辺の下縁側と、を、エアバッグの内周面側に縫合するとともに、両側辺の上下方向の中間部位を開口させた状態として、ベントホールの周縁に縫合して、配設されていた。上流側室から下流側室へ流れる膨張用ガスの順流時には、隔壁の左右両側辺と下片とが、下流側室の内周面から離れて、その離れた隙間部位から、下流側室に膨張用ガスが流れていた。また、下流側室から上流側室へ流れる膨張用ガスの逆流時には、隔壁の左右両側辺と下片とが、下流側室の内周面に圧接されて、逆流が抑制されて、ベントホールから膨張用ガスを排気する構成としていた。   2. Description of the Related Art Conventionally, an airbag that can suppress backflow is known in which an upstream chamber connected to an inflator and a downstream chamber that receives an occupant are partitioned by a partition wall provided with a backflow suppression mechanism (see, for example, Patent Document 1). ). The partition wall includes a rectangular main body portion that divides the upstream chamber and the downstream chamber, a side that extends rearward on the downstream chamber side on the left and right sides of the main body portion, and a rearward side toward the downstream chamber on the lower side of the main body portion. A lower piece that extends, and stitches the entire area of the upper edge side including the left and right sides and the lower edge side of both sides to the inner peripheral surface side of the airbag, and the vertical direction of both sides. In the state where the middle part of the vent was opened, the peripheral part of the vent hole was sewn and arranged. During the forward flow of the expansion gas flowing from the upstream chamber to the downstream chamber, the left and right sides and the lower piece of the partition wall are separated from the inner peripheral surface of the downstream chamber, and the expansion gas flows into the downstream chamber from the separated gap portion. It was. In addition, when the expansion gas flowing from the downstream chamber to the upstream chamber is backflowed, the left and right sides of the partition wall and the lower piece are pressed against the inner peripheral surface of the downstream chamber, the backflow is suppressed, and the expansion gas is discharged from the vent hole. Was configured to exhaust.

特開２００１−１６３１４４号公報JP 2001-163144 A

しかし、従来のエアバッグの隔壁では、上縁側の全域と左右両側片の下縁とがエアバッグの内周面側に縫合されているものの、左右両側片では、膨張用ガスの順流や逆流の場合の膨張用ガスの流れ方向が、上下方向に長い自由端とした先端と、その先端と対向する上流側室との境界部位と、を結ぶ方向として、それらの両縁が、共に、上下方向に長く、かつ、エアバッグの内周面側に結合されていない状態としていた。すなわち、左右の側辺は、共に、上下方向の中間部位がベントホールの周縁に部分的に縫合されているものの、そのベントホールの上下の部位では、上縁側や下縁側まで、エアバッグの内周面側に全く縫合されていない状態としていた。そのため、ベントホールの上下の部位では、エアバッグの内周面に対してずれ易い構成となっており、下流側室の内圧が高まって、下流側室の膨張用ガスが上流側室に逆流しようとする際、隔壁が上流側室の側に押されて、隔壁の側辺における上流側室と下流側室との境界部位における縫合されていない縁が上流側室側にずれれば、その側辺の先端の自由端側も自動的にずれて、その先端が捲れ易くなり、そして、先端が捲れてしまえば、直ちに、膨張用ガスが上流側室の側に逆流する事態を招いてしまう。その結果、従来のエアバッグでは、逆流を抑制する点で、改善の余地があった。   However, in the conventional airbag partition, the entire region on the upper edge side and the lower edges of the left and right side pieces are sewn to the inner peripheral surface side of the airbag, but the right and left side pieces are not inflated in the forward or reverse flow of the inflation gas. In this case, the flow direction of the expansion gas is a direction connecting the tip end having a long free end in the vertical direction and the boundary portion between the upstream chamber facing the tip and both edges thereof are in the vertical direction. It was long and not connected to the inner peripheral surface of the airbag. That is, both the left and right sides are partially stitched to the periphery of the vent hole in the vertical direction, but at the upper and lower portions of the vent hole, the inner side of the airbag extends to the upper edge side and the lower edge side. It was set as the state which is not sewn on the peripheral surface side at all. Therefore, the upper and lower parts of the vent hole are configured to be easily displaced with respect to the inner peripheral surface of the airbag, and the internal pressure of the downstream chamber increases, and the inflation gas in the downstream chamber attempts to flow backward to the upstream chamber. If the partition is pushed to the upstream chamber side and the unstitched edge at the boundary between the upstream chamber and the downstream chamber on the side of the partition is shifted to the upstream chamber, the free end side at the tip of the side However, if the tip is swollen, the expansion gas immediately flows back to the upstream chamber side. As a result, the conventional airbag has room for improvement in terms of suppressing backflow.

本発明は、上述の課題を解決するものであり、上流側室と下流側室との間の隔壁が安定して高い逆流抑制機能を確保可能なエアバッグを提供することを目的とする。   The present invention solves the above-described problems, and an object thereof is to provide an airbag in which a partition wall between an upstream chamber and a downstream chamber can stably secure a high backflow suppressing function.

本発明に係るエアバッグでは、膨張用ガスの流れの上流側の上流側室と下流側の下流側室との間に、前記上流側室から前記下流側室への膨張用ガスの順流を許容し、前記下流側室から前記上流側室への膨張用ガスの逆流を抑制可能な逆流抑制部を有した隔壁、が配設されて構成されるエアバッグであって、
前記隔壁の外周縁が、
前記エアバッグにおける前記上流側室と前記下流側室との間の境界部位の内周面に対して連続的に結合される連続結合部と、
前記連続結合部の両端の間における前記上流側室と前記下流側室との間の境界部位の内周面に対して、部分的に結合される部分的結合部と、
前記部分的結合部の周囲で、前記下流側室の内周面に圧接可能として、前記上流側室と前記下流側室との間の前記境界部位に沿うように配設されるヒレ部と、
を備えて構成され、
前記ヒレ部が、順流時に、前記下流側室の内周面から離脱させ、前記隔壁の外周縁における前記連続結合部と前記部分的結合部との前記境界部位の内周面に結合されていない非結合部の部位を経て流れる膨張用ガスの順流用流路を形成して、膨張用ガスの順流を許容し、逆流時に、前記下流側室の内周面に圧接させ、前記順流用流路を閉塞して、膨張用ガスの逆流を抑制する逆流抑制部、を構成していることを特徴とする。 In the airbag according to the present invention, the inflation gas is allowed to flow forward from the upstream chamber to the downstream chamber between the upstream upstream chamber and the downstream downstream chamber of the flow of the inflation gas, and the downstream A partition wall having a backflow suppressing portion capable of suppressing a backflow of the inflation gas from the side chamber to the upstream side chamber,
The outer peripheral edge of the partition wall is
A continuous coupling portion continuously coupled to an inner peripheral surface of a boundary portion between the upstream chamber and the downstream chamber in the airbag;
A partial coupling portion that is partially coupled to an inner peripheral surface of a boundary portion between the upstream chamber and the downstream chamber between both ends of the continuous coupling portion;
A fin portion disposed so as to be along the boundary portion between the upstream chamber and the downstream chamber, capable of being pressed against the inner peripheral surface of the downstream chamber around the partial coupling portion,
Configured with
The fin portion is separated from the inner circumferential surface of the downstream chamber at the time of forward flow, and is not coupled to the inner circumferential surface of the boundary portion between the continuous coupling portion and the partial coupling portion on the outer circumferential edge of the partition wall. A flow path for the forward flow of the expansion gas flowing through the coupling portion is formed to allow the forward flow of the expansion gas, and at the time of the reverse flow, it is brought into pressure contact with the inner peripheral surface of the downstream chamber, thereby closing the forward flow path. And the backflow suppression part which suppresses the backflow of the gas for expansion is comprised, It is characterized by the above-mentioned.

本発明に係るエアバッグでは、膨張用ガスの順流時には、隔壁の外周縁における部分的結合部の周囲のヒレ部が、下流側室の内周面から離脱して、ヒレ部と下流側室の内周面との間に、非結合部から延びる順流用流路が形成されることから、膨張用ガスが、順流用流路を経て、上流側室から下流側室へ流れる。一方、膨張用ガスが逆流しようとする際には、ヒレ部が下流側室の内周面に圧接されて、順流用流路が閉塞されることから、下流側室の膨張用ガスが上流側室へ逆流することが防止される。この時、隔壁の外周縁は、上流側室と下流側室との境界部位の内周面に対して、連続的に結合される連続結合部と部分的に結合される部分的結合部とによって、結合されており、ヒレ部の先端から離れた元部側が、上流側室の側に移動しようといても、その周囲には、連続結合部や部分的結合部が配設されて、ヒレ部は自由にずれ移動し難い。そのため、ヒレ部は、ずれ移動して捲れる事態を生じさせ難いことから、安定して、下流側室の内周面に圧接されて、膨張用ガスの逆流を防止できる。   In the airbag according to the present invention, during the forward flow of the inflation gas, the fin portion around the partial coupling portion at the outer peripheral edge of the partition wall is separated from the inner peripheral surface of the downstream chamber, and the inner periphery of the fin portion and the downstream chamber is Since the forward flow path extending from the non-bonded portion is formed between the surface and the surface, the expansion gas flows from the upstream chamber to the downstream chamber via the forward flow path. On the other hand, when the expansion gas tries to flow backward, the fin portion is pressed against the inner peripheral surface of the downstream chamber and the forward flow passage is closed, so that the expansion gas in the downstream chamber flows backward to the upstream chamber. Is prevented. At this time, the outer peripheral edge of the partition wall is coupled to the inner circumferential surface of the boundary portion between the upstream chamber and the downstream chamber by a continuous coupling portion that is continuously coupled and a partial coupling portion that is partially coupled. Even if the original part side away from the tip of the fin part is about to move to the upstream chamber side, a continuous coupling part or a partial coupling part is arranged around it, and the fin part is free to move. Difficult to move. For this reason, the fin portion is unlikely to cause a situation where it slips and moves, so that the fin portion can be stably brought into pressure contact with the inner peripheral surface of the downstream chamber and the backflow of the expansion gas can be prevented.

したがって、本発明に係るエアバッグでは、上流側室と下流側室との間の隔壁が、安定して高い逆流抑制機能を確保できる。   Therefore, in the airbag according to the present invention, the partition wall between the upstream chamber and the downstream chamber can secure a stable and high backflow suppressing function.

そして、本発明に係るエアバッグでは、少なくとも前記下流側室と前記下流側室近傍の前記上流側室との部位の前記エアバッグの外周壁が、相互に略同一の外形形状の２枚のエアバッグ用基布の外周縁相互を結合させて構成され、
前記隔壁が、
１枚の隔壁用基布から形成されるとともに、
該隔壁用基布の両縁を、２枚の前記エアバッグ用基布の外周縁相互の結合時に、前記外周縁相互の間に配設させて、２枚の前記エアバッグ用基布の外周縁に結合される縁側結合部として、構成され、
前記隔壁の前記連続結合部が、前記隔壁用基布の一端側に配設されて、２枚の前記エアバッグ用基布の一方側の内周面側に結合される構成とし、
前記隔壁の前記部分的結合部が、前記隔壁用基布の他端側に配設されて、２枚の前記エアバッグ用基布の他方側の内周面側に結合されていることが望ましい。 In the airbag according to the present invention, two airbag bases whose outer peripheral walls of at least the downstream chamber and the upstream chamber in the vicinity of the downstream chamber have substantially the same outer shape. Constructed by joining the outer peripheries of the fabric,
The partition is
While being formed from a single partition wall fabric,
Both edges of the base fabric for partition walls are disposed between the outer peripheral edges of the two airbag base fabrics when they are joined to each other. It is configured as an edge-side joint that is joined to the periphery,
The continuous coupling portion of the partition wall is disposed on one end side of the partition wall fabric, and is configured to be coupled to one inner peripheral surface side of the two airbag fabrics,
It is desirable that the partial coupling portion of the partition wall is disposed on the other end side of the partition wall fabric and is coupled to the other inner peripheral surface side of the two airbag fabrics. .

このような構成では、隔壁用基布の一端側を、２枚のエアバッグ用基布の一方側に結合させて、連続結合部を形成し、隔壁用基布の他端側を、２枚のエアバッグ用基布の他方側に結合させて、部分的結合部を形成し、ついで、隔壁用基布を間にして、２枚のエアバッグ用基布を重ね、そして、重ねた２枚のエアバッグ用基布の外周縁相互を、縁側結合部を形成しつつ、結合させれば、隔壁を設けたエアバッグを形成できて、簡便に、エアバッグを製造することができる。また、このように形成したエアバッグでは、折り畳む等の際の２枚のエアバッグ用基布を平らに展開させた際、隔壁を形成する隔壁用基布も、２枚のエアバッグ用基布の間で平らに展開させることができることから、嵩張らずに、かつ、折り畳み等に支障が生じ難い。   In such a configuration, one end of the partition wall fabric is joined to one side of the two airbag fabrics to form a continuous coupling portion, and the other end of the partition fabric is connected to two sheets. To the other side of the air bag base fabric to form a partial connecting portion, and then to overlap the two air bag base fabrics with the partition wall base fabric in between If the outer peripheral edges of the airbag base fabric are joined together while forming the edge-side joining portion, an airbag having a partition wall can be formed, and the airbag can be manufactured easily. Moreover, in the airbag formed in this way, when the two airbag base fabrics when folded or the like are flattened, the partition base fabric that forms the partition walls is also the two airbag base fabrics. Since it can be flattened between the two, it is not bulky, and it is difficult to cause troubles in folding.

この場合、前記連続結合部を結合させた２枚の前記エアバッグ用基布の一方が、前記エアバッグにおける保護対象物を受け止める受止側壁部とし、
前記部分的結合部を結合させた２枚の前記エアバッグ用基布の他方が、前記エアバッグの搭載部位側に支持される支持側壁部として構成されていることが望ましい。 In this case, one of the two airbag fabrics combined with the continuous coupling portion is a receiving side wall portion that receives a protection object in the airbag,
It is desirable that the other of the two airbag fabrics combined with the partial coupling portion is configured as a supporting side wall portion supported on the side of the airbag mounting site.

このような構成では、平らに展開した隔壁用基布の他端側の部分的結合部が、支持側壁部に結合され、隔壁用基布の一端側の連続結合部が、受止側壁部に結合される構成であって、隔壁の支持側壁部に結合される部分的結合部が、隔壁の受止側壁部に結合される連続結合部より、順流側の方向にずれて位置する状態となって、換言すれば、膨張時の上流側室と下流側室とを区画する隔壁が、上流側室側から見て、受止側壁部の内周面に対して鈍角の傾斜角度で接触し、支持側壁部の内周面に対して鋭角の傾斜角度で接触するように、配設される。そのため、膨張用ガスが上流側室から下流側室に向かって順流として流れる場合には、傾斜した隔壁に案内されて、支持側壁部側の非結合部に向かい、その非結合部の周囲のヒレ部を支持側壁部の内周面から離脱させて、容易に順流用流路が形成されることから、その順流用流路を経て、円滑に、膨張用ガスが下流側室に流れる。一方、下流側室の受止側壁部が保護対象物を受け止める等して、上流側室より下流側室の内圧が高まれば、傾斜した隔壁が上流側室側の支持側壁部の側に押圧され、その傾斜した隔壁の外周縁の非結合部が、隔壁の押圧状態に伴なって、円滑に、下流側室に連なる支持側壁部の内周面に圧接され、さらに、非結合部に連なるヒレ部も、円滑に、下流側室の支持側壁部の内周面に圧接されることから、順流用流路が容易に閉塞され、逆流防止状態を安定して確保できる。   In such a configuration, the partial joint portion on the other end side of the partition wall fabric that is flattened is joined to the support side wall portion, and the continuous joint portion on one end side of the partition wall fabric is joined to the receiving side wall portion. In this configuration, the partial coupling portion coupled to the support side wall portion of the partition wall is located in a state shifted from the continuous coupling portion coupled to the receiving side wall portion of the partition wall in the forward flow direction. In other words, the partition wall that divides the upstream chamber and the downstream chamber at the time of expansion is in contact with the inner peripheral surface of the receiving sidewall portion at an obtuse angle when viewed from the upstream chamber side, and the supporting sidewall portion It arrange | positions so that it may contact with an acute angle with respect to the internal peripheral surface of this. Therefore, when the expansion gas flows as a forward flow from the upstream chamber toward the downstream chamber, it is guided by the inclined partition wall toward the non-bonded portion on the support side wall portion, and the fin portion around the non-bonded portion is Since the forward flow passage is easily formed by separating from the inner peripheral surface of the support side wall, the inflation gas smoothly flows into the downstream chamber through the forward flow passage. On the other hand, if the receiving side wall portion of the downstream chamber receives the object to be protected, and the internal pressure of the downstream chamber is higher than the upstream chamber, the inclined partition wall is pressed toward the supporting side wall portion on the upstream chamber side and inclined The non-bonded portion of the outer peripheral edge of the partition wall is smoothly pressed into contact with the inner peripheral surface of the support side wall portion connected to the downstream chamber as the partition wall is pressed, and the fin portion connected to the non-bonded portion also smoothly Since it is pressed against the inner peripheral surface of the support side wall portion of the downstream chamber, the forward flow path is easily closed, and a backflow preventing state can be stably secured.

また、本発明に係るエアバッグでは、前記隔壁が、前記連続結合部、前記部分的結合部、及び、前記非結合部により囲まれる外周縁の部位を、前記隔壁を設けない膨張完了時の前記エアバッグの部位の内周形状と同等として、配設されていることが望ましい。   Further, in the airbag according to the present invention, the partition wall may be formed on the outer peripheral portion surrounded by the continuous joint portion, the partial joint portion, and the non-joint portion when the inflation is completed without providing the partition wall. It is desirable that the air bag is disposed so as to be equivalent to the inner peripheral shape of the portion of the airbag.

このような構成では、膨張完了時のエアバッグの隔壁が、エアバッグの外周壁側に部分的に引っ張られずに、シワを発生させること無く、平面状態を確保し易いことから、ヒレ部の挙動を安定させることができて、膨張用ガスの順流の制御と逆流の制御とを共に円滑に実行することが可能となる。   In such a configuration, the partition wall of the airbag when the inflation is completed is not partially pulled toward the outer peripheral wall side of the airbag, and it is easy to ensure a flat state without generating wrinkles. It is possible to stabilize both the forward flow control and the back flow control of the inflation gas.

また、本発明に係るエアバッグでは、前記隔壁の前記部分的結合部は、種々の配設状態があり、例えば、前記隔壁用基布の他端側における前記連続結合部の両端間の略中央付近に配設される部分的中央結合部として構成してもよいし、あるいは、前記隔壁用基布の他端側における両縁側から延び、かつ、先端相互を離して、配設される部分的縁側結合部として構成してもよい。   In the airbag according to the present invention, the partial coupling portion of the partition wall may have various arrangement states, for example, a substantially center between both ends of the continuous coupling portion on the other end side of the partition wall fabric. It may be configured as a partial central coupling portion disposed in the vicinity, or it may be configured to extend from both edge sides on the other end side of the partition wall base fabric and be disposed apart from the ends. You may comprise as an edge side coupling | bond part.

部分的中央結合部を設ける場合には、部分的中央結合部の両縁側に、順流用流路を形成する非結合部が形成され、部分的縁側結合部を設ける場合には、部分的縁側結合部の間に、順流用流路を形成する非結合部が形成されることとなる。   When providing a partial central joint, non-joints forming a forward flow channel are formed on both edges of the partial central joint, and when providing a partial edge joint, a partial marginal connection is provided. A non-bonding portion that forms a forward flow channel is formed between the portions.

そして、部分的中央結合部を設ける場合には、前記連続結合部の両端と前記部分的中央結合部の両端との間における前記隔壁用基布の先端側に、それぞれ、前記下流側室の内周面側に結合される縁側補助結合部が、配設されていてもよい。   And when providing a partial center coupling | bond part, the inner periphery of the said downstream chamber is respectively provided in the front end side of the said base fabric for partition between the both ends of the said continuous coupling part and both ends of the said partial central coupling part. The edge side auxiliary | assistant coupling | bond part couple | bonded with the surface side may be arrange | positioned.

このような構成では、部分的中央結合部の両縁の非結合部からヒレ部の先端に向かう位置に、縁側補助結合部が設けられて、ヒレ部の捲れが規制されることから、隔壁は、一層、安定した逆流防止機能を確保できる。   In such a configuration, since the edge side auxiliary coupling part is provided at a position from the non-bonding part on both edges of the partial central coupling part toward the tip of the fin part, and curling of the fin part is restricted, the partition wall is In addition, a more stable backflow prevention function can be secured.

また、部分的縁側結合部を設ける場合には、前記部分的縁側結合部の周囲に配設されるヒレ部が、幅寸法を、前記部分的縁側結合部間の離隔距離と同等として、
前記隔壁用基布の他端側における前記部分的縁側結合部間から離れる先端側に、前記下流側室の内周面側に結合される中央側補助結合部、を配設させて構成してもよい。 Further, when providing the partial edge side coupling portion, the fin portion disposed around the partial edge side coupling portion has a width dimension equivalent to the separation distance between the partial edge side coupling portions,
A center side auxiliary coupling portion coupled to the inner peripheral surface side of the downstream chamber may be disposed on the distal end side away from between the partial edge side coupling portions on the other end side of the partition wall fabric. Good.

このような構成では、ヒレ部の幅寸法を小さくでき、隔壁用基布の使用材料を少なくできて、隔壁の折り畳み時の容積を小さくできる。なお、ヒレ部が、幅寸法を小さくしても、先端側を、中央側補助結合部により、下流側室の内周面側に結合させていることから、捲れ難く、隔壁は、安定した逆流防止機能を確保できる。   In such a configuration, the width of the fin portion can be reduced, the material used for the partition fabric can be reduced, and the volume of the partition when folded can be reduced. Even if the width of the fin portion is reduced, the tip side is connected to the inner peripheral surface side of the downstream chamber by the center side auxiliary connecting portion, so that it is difficult to bend, and the partition wall prevents stable backflow. Function can be secured.

本発明の一実施形態であるエアバッグが使用される歩行者用エアバッグ装置を搭載させた車両の概略部分平面図である。1 is a schematic partial plan view of a vehicle on which a pedestrian airbag device in which an airbag according to an embodiment of the present invention is used is mounted. 実施形態の歩行者用エアバッグ装置の作動時の概略縦断面図であり、図１のII−II部位に対応する。It is a schematic longitudinal cross-sectional view at the time of the action | operation of the airbag apparatus for pedestrians of embodiment, and respond | corresponds to the II-II site | part of FIG. 実施形態のエアバッグ装置の作動時におけるインフレーター付近の概略拡大縦断面図である。It is a general | schematic expanded longitudinal cross-sectional view of the inflator vicinity at the time of the action | operation of the airbag apparatus of embodiment. 実施形態のエアバッグにおけるインフレーターを挿入した状態での平面図である。It is a top view in the state where the inflator in the airbag of an embodiment was inserted. 実施形態のエアバッグの構成部材を示す平面図である。It is a top view which shows the structural member of the airbag of embodiment. 実施形態のエアバッグの隔壁の配設部位を示す図であり、概略部分平面図と、受止側壁部を外した状態の概略部分平面図である。It is a figure which shows the arrangement | positioning site | part of the partition of the airbag of embodiment, and is a schematic partial top view and a schematic partial top view of the state which removed the receiving side wall part. 実施形態のエアバッグの隔壁の配設部位の膨張時を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the time of expansion | swelling of the arrangement | positioning site | part of the partition of the airbag of embodiment, and is a general | schematic partial longitudinal cross-sectional view and a general | schematic fragmentary perspective view which shows the state of the partition in that case. 実施形態のエアバッグの隔壁の配設部位の膨張用ガスの順流時を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the time of the forward flow of the gas for expansion | swelling of the arrangement | positioning part of the partition of the airbag of embodiment, and is a general | schematic partial longitudinal cross-sectional view and a general | schematic partial perspective view which shows the state of the partition in that case. 実施形態の変形例のエアバッグにおける隔壁の配設部位を示す図であり、概略部分平面図と、受止側壁部を外した状態の概略部分平面図である。It is a figure which shows the arrangement | positioning site | part of the partition in the airbag of the modification of embodiment, and is a general | schematic partial top view and the general | schematic partial top view of the state which removed the receiving side wall part. 図９に示すエアバッグの膨張時における隔壁の配設部位を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the arrangement | positioning site | part of the partition at the time of expansion | swelling of the airbag shown in FIG. 9, and is a general | schematic fragmentary longitudinal cross-sectional view and the general | schematic fragmentary perspective view which shows the state of the partition in that case. 図９に示すエアバッグの隔壁の配設部位における膨張用ガスの順流時を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the time of the forward flow of the gas for expansion | swelling in the arrangement | positioning site | part of the partition wall of the airbag shown in FIG. 9, and is a schematic partial longitudinal cross-sectional view and a schematic partial perspective view which shows the state of the partition wall in that case. 実施形態の他の変形例のエアバッグにおける隔壁の配設部位を示す図であり、概略部分平面図と、受止側壁部を外した状態の概略部分平面図である。It is a figure which shows the arrangement | positioning site | part of the partition in the airbag of the other modification of embodiment, and is a general | schematic partial top view and the general | schematic partial top view of the state which removed the receiving side wall part. 図１２に示すエアバッグの膨張時における隔壁の配設部位を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the arrangement | positioning site | part of the partition at the time of expansion | swelling of the airbag shown in FIG. 12, and is a general | schematic partial longitudinal cross-sectional view and the general | schematic fragmentary perspective view which shows the state of the partition in that case. 図１２に示すエアバッグの隔壁の配設部位における膨張用ガスの順流時を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the time of the forward flow of the gas for expansion | swelling in the arrangement | positioning site | part of the partition wall of the airbag shown in FIG. 12, and is a general | schematic partial longitudinal cross-sectional view and a general | schematic fragmentary perspective view which shows the state of the partition in that case. 実施形態のさらに他の変形例のエアバッグにおける隔壁の配設部位を示す図であり、概略部分平面図と、受止側壁部を外した状態の概略部分平面図である。It is a figure which shows the arrangement | positioning site | part of the partition wall in the airbag of the further another modification of embodiment, and is a general | schematic partial top view and the general | schematic partial top view of the state which removed the receiving side wall part. 図１５に示すエアバッグの膨張時における隔壁の配設部位を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the arrangement | positioning site | part of the partition at the time of expansion | swelling of the airbag shown in FIG. 15, and is a general | schematic partial longitudinal cross-sectional view and the general | schematic fragmentary perspective view which shows the state of the partition in that case. 図１５に示すエアバッグの隔壁の配設部位における膨張用ガスの順流時を示す図であり、概略部分縦断面図と、その際の隔壁の状態を示す概略部分斜視図である。It is a figure which shows the time of the forward flow of the gas for expansion | swelling in the arrangement | positioning site | part of the partition wall of the airbag shown in FIG. 15, and is a general | schematic fragmentary longitudinal cross-sectional view and a general | schematic fragmentary perspective view which shows the state of the partition wall in that case.

以下、本発明の一実施形態を図面に基づいて説明すると、実施形態のエアバッグ２３は、図１，２に示すように歩行者用エアバッグ装置（以下、適宜、「エアバッグ装置」と略す）Ｍに使用されるものである。エアバッグ装置Ｍは、車両Ｖのフードパネル９の後端９ａ付近のエンジンルームＥＲ側に搭載されて、エアバッグ２３と、エアバッグ２３に膨張用ガスを供給するインフレーター１５と、折り畳んだエアバッグ２３を収納するケース１０と、を備えて構成されている。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the airbag 23 of the embodiment is abbreviated as a pedestrian airbag device (hereinafter, appropriately referred to as “airbag device”). ) Used for M. The airbag device M is mounted on the engine room ER side near the rear end 9a of the hood panel 9 of the vehicle V, and includes an airbag 23, an inflator 15 for supplying inflation gas to the airbag 23, and a folded airbag. And a case 10 that houses the housing 23.

なお、本明細書では、特に断らない限り、前後、上下、及び、左右の方向は、それぞれ、車両Ｖの前後、上下、及び、左右の方向と一致させて、説明する。   In the present specification, unless otherwise specified, the front-rear, up-down, and left-right directions will be described in accordance with the front-rear, up-down, and left-right directions of the vehicle V, respectively.

エアバッグ装置Ｍのケース１０は、金属製（板金製）として、車両Ｖのボディ１側のフードリッジリインホースから延びるフランジ等から構成される取付部２に対し、インフレーター１５の取付ブラケット１８のボルト１９を利用して、ナット２０止めされて、固定されている。ケース１０は、上方に、膨張時のエアバッグ２３を突出させるための開口１３を備えた略直方体の箱形状として、車両Ｖの左右方向に沿って延びた長方形板状の底壁部１１と、底壁部１１の外周縁から上方に延びる略四角筒形状の周壁部１２とを備えて構成されている。なお、ケース１０は、フロントウインドシールド（フロントガラスとも言う。以下、単に、ウインドシールドとする）４の前端４ａ側の下方から前方に延びるカウル６の前方側における上側位置に、搭載されている。また、図１に示す符号７の部材は、ワイパである。カウル６は、剛性の高いカウルパネル６ａとカウルルーバ６ｂとから構成されている。   The case 10 of the airbag device M is made of metal (made of sheet metal), and the bolts of the mounting bracket 18 of the inflator 15 are attached to the mounting portion 2 composed of a flange or the like extending from the hood ridge rein hose on the body 1 side of the vehicle V. 19, the nut 20 is fixed and fixed. The case 10 has a rectangular plate-like bottom wall portion 11 extending in the left-right direction of the vehicle V as a substantially rectangular box shape having an opening 13 for projecting the airbag 23 when inflated. And a peripheral wall portion 12 having a substantially square cylindrical shape extending upward from the outer peripheral edge of the bottom wall portion 11. The case 10 is mounted at an upper position on the front side of the cowl 6 that extends forward from the lower side of the front end 4a side of the front windshield (also referred to as a windshield). Moreover, the member of the code | symbol 7 shown in FIG. 1 is a wiper. The cowl 6 includes a highly rigid cowl panel 6a and a cowl louver 6b.

インフレーター１５は、図４に示すように、車両Ｖの左右方向に沿って、軸方向を配置させた円柱状として、先端に、膨張用ガスを吐出するガス吐出部１６を配設させて構成されている。インフレーター１５は、複数（実施形態では３個）の取付ブラケット１８に保持され、インナチューブ３９に包まれた状態でエアバッグ２３内に挿入され、取付ブラケット１８のボルト１９を利用して、ケース１０の底壁部１１に固定されている（図２，３参照）。既述したように、取付ブラケット１８のボルト１９は、底壁部１１を貫通して、車両Ｖのボディ１側の取付部２にナット２０止めされ、インフレーター１５とともに、ケース１０を取付部２に固定し、そしてさらに、インフレーター１５がエアバッグ２３内に挿入された状態しており、エアバッグ２３も、ケース１０の底壁部１１に取付固定されることとなる。   As shown in FIG. 4, the inflator 15 has a cylindrical shape in which the axial direction is arranged along the left-right direction of the vehicle V, and is configured by disposing a gas discharge portion 16 that discharges inflation gas at the tip. ing. The inflator 15 is held by a plurality (three in the embodiment) of the mounting brackets 18 and inserted into the airbag 23 in a state of being wrapped in the inner tube 39. It is being fixed to the bottom wall part 11 (refer FIG.2, 3). As described above, the bolt 19 of the mounting bracket 18 passes through the bottom wall portion 11 and is fixed to the mounting portion 2 on the body 1 side of the vehicle V with the nut 20, and the case 10 is attached to the mounting portion 2 together with the inflator 15. Further, the inflator 15 is inserted into the airbag 23, and the airbag 23 is also attached and fixed to the bottom wall portion 11 of the case 10.

なお、実施形態の場合、車両Ｖのフロントバンパ３には、歩行者との衝突を検知可能なセンサ３ａが、配設されており、センサ３ａからの信号を入力させている図示しない作動回路が、センサ３ａからの信号に基づいて車両Ｖの歩行者との衝突を検知した際に、エアバッグ装置Ｍのインフレーター１５を作動させるように構成されている。   In the case of the embodiment, the front bumper 3 of the vehicle V is provided with a sensor 3a that can detect a collision with a pedestrian, and an operation circuit (not shown) that inputs a signal from the sensor 3a. When the collision of the vehicle V with a pedestrian is detected based on the signal from the sensor 3a, the inflator 15 of the airbag apparatus M is activated.

エアバッグ２３は、図１〜５に示すように、膨張完了時に、フードパネル９の後端９ａからカウル６やウインドシールド４の前縁４ａの上方を覆う横膨張部２４と、横膨張部２４の左右両端から後方に延びて左右のフロントピラー５（５Ｌ，５Ｒ）の上方を覆う縦膨張部２８（Ｌ，Ｒ）と、を備えて構成されている。エアバッグ２３の外周壁３０は、上面側の歩行者を受け止める受止側壁部３１と、下面側のフードパネル９やフロントピラー５の上面９ｂ，５ａ側に支持される支持側壁部３２と、を備えて構成されている。実施形態の場合、受止側壁部３１と支持側壁部３２とは、図５に示すように、外形形状を等しくしたエアバッグ用基布７０，７１から構成されており、エアバッグ２３の外周壁３０は、エアバッグ用基布７０，７１を重ねて、外周縁７０ａ，７１ａ相互を縫合して、形成されている。   As shown in FIGS. 1 to 5, the airbag 23 includes a lateral inflation portion 24 that covers the cowl 6 and the front edge 4 a of the windshield 4 from the rear end 9 a of the hood panel 9 when the inflation is completed, and a lateral inflation portion 24. A vertical expansion portion 28 (L, R) that extends rearward from both left and right ends of the left and right sides and covers the upper side of the left and right front pillars 5 (5L, 5R). The outer peripheral wall 30 of the airbag 23 includes a receiving side wall portion 31 for receiving a pedestrian on the upper surface side, and a supporting side wall portion 32 supported on the upper surface 9b, 5a side of the hood panel 9 on the lower surface side and the front pillar 5. It is prepared for. In the case of the embodiment, as shown in FIG. 5, the receiving side wall portion 31 and the support side wall portion 32 are configured by airbag base fabrics 70 and 71 having the same outer shape, and the outer peripheral wall of the airbag 23. 30 is formed by overlapping the airbag base fabrics 70 and 71 and stitching the outer peripheral edges 70a and 71a together.

また、エアバッグ２３は、膨張完了時の横膨張部２４の受止側壁部３１と支持側壁部３２との離隔距離を規制するように、横膨張部２４の中央付近の前後に配設される前テザー３４、後テザー３５と、横膨張部２４の左右両端付近に配設される左テザー３６、右テザー３７と、を備えて構成されている。前テザー３４は、図２，５に示すように、受止側壁部３１と支持側壁部３２とに別々に結合されるテザー用基布７２，７３を相互に結合させて構成され、後テザー３５も、受止側壁部３１と支持側壁部３２とに別々に結合されるテザー用基布７４，７５を相互に結合させて構成されている。同様に、左右のテザー３６，３７も、受止側壁部３１と支持側壁部３２とに別々に結合されるテザー用基布７６，７７を相互に結合させて構成されている。   Moreover, the airbag 23 is arrange | positioned before and behind the center vicinity of the horizontal expansion part 24 so that the separation distance of the receiving side wall part 31 and the support side wall part 32 of the horizontal expansion part 24 at the time of completion of expansion may be regulated. The front tether 34, the rear tether 35, and the left tether 36 and the right tether 37 disposed near the left and right ends of the lateral expansion portion 24 are configured. As shown in FIGS. 2 and 5, the front tether 34 is configured by mutually connecting tether base fabrics 72 and 73 that are separately coupled to the receiving side wall portion 31 and the support side wall portion 32. Also, tether base fabrics 74 and 75 that are separately coupled to the receiving side wall portion 31 and the supporting side wall portion 32 are coupled to each other. Similarly, the left and right tethers 36 and 37 are configured by mutually joining tether base fabrics 76 and 77 that are separately coupled to the receiving side wall portion 31 and the support side wall portion 32.

また、横膨張部２４の前後のテザー３４，３５の間の支持側壁部３２には、左右方向に延びるスリット２５と、各取付ブラケット１８のボルト１９を貫通させる取付孔２６と、が配設されている。スリット２５は、インナチューブ３９に包んだ状態のインフレーター１５をエアバッグ２３内に挿入させるためのものであり、スリット２５の外表面側には、スリット２５を覆うカバー布３３が配設されている。   In addition, a slit 25 extending in the left-right direction and a mounting hole 26 through which the bolt 19 of each mounting bracket 18 passes are disposed in the support side wall portion 32 between the front and rear tethers 34, 35 of the lateral expansion portion 24. ing. The slit 25 is for inserting the inflator 15 wrapped in the inner tube 39 into the airbag 23, and a cover cloth 33 covering the slit 25 is disposed on the outer surface side of the slit 25. .

カバー布３３は、後縁３３ａ側がスリット２５の後方側の支持側壁部３２に縫合されるとともに、各取付ブラケット１８のボルト１９を貫通させる取付孔３３ｂが形成されている。   The cover cloth 33 is sewn to the support side wall portion 32 on the rear side of the slit 25 on the rear edge 33a side, and an attachment hole 33b through which the bolt 19 of each attachment bracket 18 passes is formed.

インナチューブ３９は、取付ブラケット１８を取付済みのインフレーター１５を挿入させる挿入筒部３９ｃと、ガス吐出部１６の配置部位から両側に延びて、先端に、膨張用ガスを流出させる流出口３９ａ，３９ｂと、を備えた三叉状の筒形状として構成されている。挿入筒部３９ｃには、各取付ブラケット１８のボルト１９を貫通させる取付孔３９ｄが形成されている。インナチューブ３９は、図５に示すように、チューブ用基布８２から形成されるものであり、チューブ用基布８２を、折目８２ａを付けて二つ折りし、重ねた所定の外周縁相互を縫合すれば、インナチューブ３９を形成することができる。   The inner tube 39 has an insertion tube portion 39c into which the inflator 15 to which the mounting bracket 18 is already attached is inserted, and outlets 39a and 39b that extend from both sides of the gas discharge portion 16 to discharge the inflation gas to the tip. And a three-pronged cylindrical shape. A mounting hole 39d through which the bolt 19 of each mounting bracket 18 passes is formed in the insertion tube portion 39c. As shown in FIG. 5, the inner tube 39 is formed from a tube base cloth 82. The tube base cloth 82 is folded in two with a crease 82a, and a predetermined outer peripheral edge is overlapped. The inner tube 39 can be formed by sewing.

なお、受止側壁部３１や支持側壁部３２を構成するエアバッグ用基布７０，７１、テザー用基布７２，７３，７４，７５，７６，７７、チューブ用基布８２、カバー布３３、及び、後述する隔壁用基布８０は、ポリエステル糸やポリアミド糸等の織布から形成されている。   In addition, the airbag base fabrics 70 and 71, the tether base fabrics 72, 73, 74, 75, 76, and 77 constituting the receiving side wall portion 31 and the support side wall portion 32, the tube base fabric 82, the cover fabric 33, The partition wall fabric 80 described later is formed of a woven fabric such as polyester yarn or polyamide yarn.

そして、このエアバッグ２３の縦膨張部２８（Ｌ，Ｒ）には、膨張用ガスの逆流を防止可能に、逆流抑制部としてのヒレ部５８を設けた隔壁４４（Ｌ，Ｒ）が、配設されている。そのため、実施形態の縦膨張部２８Ｌ，２８Ｒは、隔壁４４（Ｌ，Ｒ）を間にした横膨張部２４側を、膨張用ガスの流れの上流側の上流側室４１とし、縦膨張部２８Ｌ，２８Ｒの後端２８ａ側を、膨張用ガスの流れの下流側の下流側室４２（Ｌ，Ｒ）として、構成されている。   A partition wall 44 (L, R) provided with a fin 58 as a backflow suppressing portion is arranged in the longitudinally expanding portion 28 (L, R) of the airbag 23 so as to prevent backflow of the inflation gas. It is installed. Therefore, in the vertical expansion portions 28L and 28R of the embodiment, the side of the horizontal expansion portion 24 with the partition wall 44 (L, R) interposed therebetween is the upstream chamber 41 on the upstream side of the flow of the expansion gas, and the vertical expansion portions 28L, The rear end 28a side of 28R is configured as a downstream chamber 42 (L, R) on the downstream side of the flow of the expansion gas.

実施形態の場合、上流側室４１は、横膨張部２４に連なっており、エアバッグ２３の全体にわたって一室として構成されているが、下流側室４２（Ｌ，Ｒ）は、左右の縦膨張部２８に配設されて、エアバッグ２３の全体に二室、配設されている。但し、下流側室４２（Ｌ，Ｒ）は、左右の縦膨張部２８Ｌ，２８Ｒとともに、エアバッグ２３の左右で対称的に配設されていることから、説明では、左側の縦膨張部２８（Ｌ）の隔壁４４（Ｌ）や下流側室４２（Ｌ）について説明し、右側の縦膨張部２８（Ｒ）の隔壁４４（Ｒ）や下流側室４２（Ｒ）についての説明は省略する。さらに、説明では、（Ｌ）の符号も、適宜、省略する。   In the case of the embodiment, the upstream chamber 41 is connected to the lateral inflating portion 24 and is configured as one chamber over the entire airbag 23, but the downstream chamber 42 (L, R) is the left and right longitudinal inflating portions 28. Two chambers are disposed in the entire airbag 23. However, since the downstream chamber 42 (L, R) is symmetrically disposed on the left and right of the airbag 23 together with the left and right vertical inflating portions 28L, 28R, in the description, the left vertical inflating portion 28 (L ) Of the partition wall 44 (L) and the downstream side chamber 42 (L), and the description of the partition wall 44 (R) and the downstream side chamber 42 (R) of the vertical expansion portion 28 (R) on the right side is omitted. Furthermore, in the description, the reference numeral (L) is also omitted as appropriate.

隔壁４４は、図５〜８に示すように、膨張用ガスＧの流れの上流側の上流側室４１と下流側の下流側室４２との間に配設されて、上流側室４１から下流側室４２への膨張用ガスＧの順流を許容し（図８参照）、下流側室４２から上流側室４１への膨張用ガスＧの逆流を抑制可能な逆流抑制部としてのヒレ部５８を有して、配設されている。   As shown in FIGS. 5 to 8, the partition wall 44 is disposed between the upstream chamber 41 on the upstream side of the flow of the expansion gas G and the downstream chamber 42 on the downstream side, from the upstream chamber 41 to the downstream chamber 42. The expansion gas G is allowed to flow forward (see FIG. 8), and is provided with a fin portion 58 as a backflow suppressing portion capable of suppressing the backflow of the expansion gas G from the downstream chamber 42 to the upstream chamber 41. Has been.

隔壁４４の外周縁４５は、上流側室４１と下流側室４２との間の境界部位４３の内周面３１ａ，３２ａに対して、縫合糸８４を使用して縫合される結合部４７，４９と、結合部４９の周囲で下流側室４２の内周面４２ａに圧接可能として、境界部位４３に沿うように配設される帯状のヒレ部５８と、を備えて構成されている。結合部４７は、境界部位４３の受止側壁部３１の内周面３１ａに対して、連続的に結合される連続結合部４７とし、結合部４９は、連続結合部４７の両端４７ａ，４７ｂの間における上流側室４１と下流側室４２との間の境界部位４３の支持側壁部３２の内周面３２ａに対して、部分的に結合される部分的結合部４９としている。そのため、隔壁４４の外周縁４５における部分的結合部４９の端部４９ａ，４９ｂと、連続結合部４７の両端４７ａ，４７ｂと，の間には，二つの非結合部５３，５４が配設されている。   The outer peripheral edge 45 of the partition wall 44 is joined to the inner peripheral surfaces 31a and 32a of the boundary portion 43 between the upstream chamber 41 and the downstream chamber 42 by using the suture thread 84, and coupling portions 47 and 49, A belt-shaped fin portion 58 disposed along the boundary portion 43 so as to be capable of being pressed against the inner peripheral surface 42a of the downstream side chamber 42 around the coupling portion 49 is provided. The coupling portion 47 is a continuous coupling portion 47 that is continuously coupled to the inner peripheral surface 31 a of the receiving side wall portion 31 of the boundary portion 43, and the coupling portion 49 is formed at both ends 47 a and 47 b of the continuous coupling portion 47. A partial coupling portion 49 that is partially coupled to the inner peripheral surface 32a of the support side wall portion 32 of the boundary portion 43 between the upstream chamber 41 and the downstream chamber 42 is provided. Therefore, two non-bonding portions 53 and 54 are disposed between the end portions 49 a and 49 b of the partial coupling portion 49 on the outer peripheral edge 45 of the partition wall 44 and both ends 47 a and 47 b of the continuous coupling portion 47. ing.

このヒレ部５８は、順流時に、図８のＡ，Ｂに示すように、下流側室４２の内周面４２ａ（３２ａ）から離脱させ、隔壁４４の外周縁４５における境界部位４３の内周面３２ａに結合されていない非結合部５３，５４の部位を経て流れる膨張用ガスＧの順流用流路５６を形成して、膨張用ガスＧの順流を許容し、逆流時に、下流側室４２の内周面３２ａに圧接させ、順流用流路５６を閉塞して、膨張用ガスＧの逆流を抑制する。   As shown in FIGS. 8A and 8B, the fin portion 58 is separated from the inner peripheral surface 42 a (32 a) of the downstream chamber 42 during forward flow, and the inner peripheral surface 32 a of the boundary portion 43 at the outer peripheral edge 45 of the partition wall 44. The flow path 56 for the expansion gas G that flows through the portions of the non-bonded portions 53 and 54 that are not coupled to the gas is formed to allow the flow of the expansion gas G to flow forward, and the inner periphery of the downstream side chamber 42 during reverse flow The forward flow channel 56 is closed by being brought into pressure contact with the surface 32a, and the backflow of the expansion gas G is suppressed.

なお、実施形態の順流用流路５６は、非結合部５３，５４におけるヒレ部５８と境界部位４３の内周面３２ａとの間を、流入口５６ａとし、ヒレ部５８の先端５８ａ側の中央５８ａｃ付近と支持側壁部３２の内周面３２ａとの間を、流出口５６ｂとして、膨張用ガスＧを、上流側室４１から下流側室４２へ供給する。   Note that the forward flow channel 56 of the embodiment has an inflow port 56a between the fin portion 58 and the inner peripheral surface 32a of the boundary portion 43 in the non-coupling portions 53 and 54, and the center of the fin portion 58 on the tip 58a side. The gas G for expansion is supplied from the upstream chamber 41 to the downstream chamber 42 as an outflow port 56b between the vicinity of 58ac and the inner peripheral surface 32a of the support side wall 32.

特に、実施形態の場合、隔壁４４は、図５，６に示すように、１枚の隔壁用基布８０（Ｌ，Ｒ）から形成されている。隔壁用基布８０は、配設される部位の受止側壁部３１や支持側壁部３２の外形形状と略同等として、両縁８０ａ，８０ｂの外形形状を、配設される部位の受止側壁部３１や支持側壁部３２の外周縁７０ａ，７１ａと同形状としている。   In particular, in the case of the embodiment, the partition wall 44 is formed of a single partition fabric 80 (L, R) as shown in FIGS. The partition base fabric 80 is substantially the same as the outer shape of the receiving side wall portion 31 and the supporting side wall portion 32 at the portion where the partition wall is disposed, and the outer shape of both edges 80a and 80b is changed to the receiving side wall at the portion to be disposed. The outer peripheral edges 70 a and 71 a of the portion 31 and the support side wall portion 32 are the same shape.

そして、隔壁４４は、エアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互の縫合時に、まず、隔壁用基布８０の元部端８０ｃの全域を、エアバッグ用基布７０の所定位置に縫合し、また、隔壁用基布８０の先端８０ｄ側の中央付近をエアバッグ用基布７１の所定位置に縫合し、そして、隔壁用基布８０の両縁８０ａ，８０ｂを、２枚のエアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互の間に配設させて、エアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互を縫合すれば、エアバッグ２３内に配設することができる。   The partition wall 44 is configured so that, when the outer peripheral edges 70a and 71a of the airbag base fabrics 70 and 71 are stitched together, first, the entire area of the base end 80c of the partition base fabric 80 is placed at a predetermined position of the airbag base fabric 70. In addition, the vicinity of the center of the partition base fabric 80 on the front end 80d side is sewn to a predetermined position of the airbag base fabric 71, and both edges 80a and 80b of the partition base fabric 80 are joined to two sheets. If the outer peripheral edges 70a and 71a of the airbag base fabrics 70 and 71 are sewn together by arranging them between the outer peripheral edges 70a and 71a of the airbag base fabrics 70 and 71, they are installed in the airbag 23. can do.

なお、これらの縫合により、隔壁用基布８０の両縁８０ａ，８０ｂ側の結合部は、エアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互に結合される縁側結合部６０，６１となり、隔壁用基布８０の元部端８０ｃの結合部位は、受止側壁部３１に連続的に結合される連続結合部４７となり、隔壁用基布８０の先端８０ｄ側の結合部は、支持側壁部３２に部分的に結合される部分的結合部４９となる。   By these stitches, the joint portions on both edges 80a and 80b of the partition wall fabric 80 become edge side joint portions 60 and 61 coupled to the outer peripheral edges 70a and 71a of the airbag fabric 70 and 71. The connecting portion of the base end 80c of the partition wall fabric 80 is a continuous connection portion 47 that is continuously connected to the receiving side wall portion 31, and the connection portion on the front end 80d side of the partition wall fabric 80 is the support side wall. The partial coupling portion 49 is partially coupled to the portion 32.

そして、実施形態の場合、ヒレ部５８は、隔壁４４の外周縁４５における支持側壁部３２の内周面３２ａ側における縁側結合部６０，６１間の略半円筒状の部位として、構成されることとなる。   And in the case of embodiment, the fin part 58 is comprised as a substantially semi-cylindrical site | part between the edge side coupling | bond parts 60 and 61 in the inner peripheral surface 32a side of the support side wall part 32 in the outer periphery 45 of the partition 44. It becomes.

また、隔壁４４は、連続結合部４７、部分的結合部４９、及び、非結合部５３，５４により囲まれる外周縁４５の部位を、隔壁４４を設けない膨張完了時のエアバッグ２３の境界部位４３の内周形状と同等として、配設されている。   In addition, the partition wall 44 is defined as a boundary region of the airbag 23 at the time of completion of inflation without providing the partition wall 44, as a region of the outer peripheral edge 45 surrounded by the continuous coupling portion 47, the partial coupling portion 49, and the non-coupling portions 53 and 54. It is arranged as being equivalent to the inner peripheral shape of 43.

すなわち、実施形態の場合には、受止側壁部３１に対して連続的に縫合される連続結合部４７が、縦膨張部２８におけるウインドシールド４から離れた外側の端部４７ｂからウインドシード４側の内側の端部４７ａに掛けて、直線状の直線部４７ｃと、直線部４７ｃから下流側室４２側に向かって曲がる曲線部４７ｄと、を設けて構成されている（図５，６参照）。そして、隔壁用基布８０における連続結合部４７の端部４７ａ，４７ｂを連結した直線部位４７ｅの連続結合部４７側の上側エリア８１が、隔壁４４を設けない膨張完了時のエアバッグ２３の境界部位４３における受止側壁部３１の内周形状と同等としており、横膨張部２４から縦膨張部２８に連なって曲がりつつ膨らむ部位の受止側壁部３１の内周面３１ａに対し、隔壁４４の外周縁４５の上側部４５ａを、シワを抑制して、結合させることができる。   That is, in the case of the embodiment, the continuous coupling portion 47 continuously stitched to the receiving side wall portion 31 is arranged on the wind seed 4 side from the outer end portion 47b of the longitudinal expansion portion 28 away from the wind shield 4. A linear straight portion 47c and a curved portion 47d that bends from the straight portion 47c toward the downstream side chamber 42 are provided (see FIGS. 5 and 6). The upper area 81 on the continuous joint portion 47 side of the straight portion 47e connecting the end portions 47a and 47b of the continuous joint portion 47 in the partition wall fabric 80 is the boundary of the airbag 23 when the inflation is completed without the partition wall 44 provided. The shape of the partition wall 44 is equal to the inner peripheral shape of the receiving side wall portion 31 in the portion 43, and the inner peripheral surface 31 a of the receiving side wall portion 31 of the portion that bulges while being bent from the lateral expansion portion 24 to the vertical expansion portion 28. The upper portion 45a of the outer peripheral edge 45 can be combined while suppressing wrinkles.

なお、隔壁４４の外周縁４５の下側部４５ｂでは、非結合部５３，５４を設けて、部分的に支持側壁部３２に結合されることから、非結合部５３，５４がシワの発生を吸収できて、隔壁４４の外周縁４５の下側部４５ｂは、シワの発生を抑制できる。その結果、隔壁４４は、その全体を、平面状態を確保しつつ、隔壁４４を設けない膨張完了時のエアバッグ２３の境界部位４３の内周形状と同等として、配設されることとなる。   In addition, in the lower part 45b of the outer peripheral edge 45 of the partition wall 44, the non-bonding parts 53 and 54 are provided and partially connected to the support side wall part 32, so that the non-bonding parts 53 and 54 generate wrinkles. The lower side 45b of the outer peripheral edge 45 of the partition wall 44 can absorb wrinkles. As a result, the entire partition wall 44 is disposed in the same manner as the inner peripheral shape of the boundary portion 43 of the airbag 23 when the inflation is completed without securing the partition wall 44 while ensuring a flat state.

また、実施形態の場合、隔壁４４の部分的結合部４９が、隔壁用基布８０の先端８０ｄ側における連続結合部４７の両端４７ａ，４７ｂ間の略中央付近に配設される部分的中央結合部５０として構成され、さらに、隔壁用基布８０の支持側壁部３２への結合部位として、部分的中央結合部５０の他に、二つの縁側補助結合部６３，６４が配設されている。これらの縁側補助結合部６３，６４は、連続結合部４７の両端４７ａ，４７ｂと部分的中央結合部５０の両端４９ａ，４９ｂとの間における隔壁用基布８０の先端８０ｄ側に、それぞれ、下流側室４２の内周面４２ａ側に結合されて、形成されている。換言すれば、これらの縁側補助結合部６３，６４は、非結合部５３，５４における縦膨張部２８の後端２８ａ側となる後方側に、配設されている。   In the case of the embodiment, the partial coupling portion 49 of the partition wall 44 is arranged in the vicinity of the approximate center between both ends 47a and 47b of the continuous coupling portion 47 on the distal end 80d side of the partition wall fabric 80. In addition to the partial central coupling portion 50, two edge side auxiliary coupling portions 63 and 64 are disposed as a coupling portion to the support side wall portion 32 of the partition wall fabric 80. These edge side auxiliary joints 63 and 64 are respectively downstream on the front end 80d side of the partition wall fabric 80 between both ends 47a and 47b of the continuous joint 47 and both ends 49a and 49b of the partial central joint 50. The side chamber 42 is formed to be coupled to the inner peripheral surface 42a side. In other words, the edge side auxiliary coupling portions 63 and 64 are disposed on the rear side of the non-bonding portions 53 and 54, which is the rear end 28a side of the longitudinal expansion portion 28.

そのため、実施形態の場合の順流用流路５６を流れる膨張用ガスＧは、ヒレ部５８と支持側壁部３２の内周面３２ａとの間において、非結合部５３，５４の部位の二つの流入口５６ａ，５６ａから後方に向かい、縁側補助結合部６３，６４の部位で方向を変えられて、縁側補助結合部６３，６４の間の一つの流出口５６ｂから後方に向けて、流出されることとなる。   Therefore, the expansion gas G flowing in the forward flow path 56 in the case of the embodiment flows between the two flows of the non-bonded portions 53 and 54 between the fin portion 58 and the inner peripheral surface 32a of the support side wall portion 32. From the inlets 56a, 56a to the rear, the direction is changed at the edge side auxiliary coupling portions 63, 64, and the flow is made to flow backward from one outlet 56b between the edge side auxiliary coupling portions 63, 64. It becomes.

実施形態のエアバッグ２３では、縫合糸８４を使用して、エアバッグ用基布７０にテザー用基布７２，７４，７６を縫合し、エアバッグ用基布７１にテザー用基布７３，７５，７７を縫合し、テザー用基布７２，７３相互、テザー用基布７４，７５相互、及び、テザー用基布７６，７７相互を縫合し、さらに、隔壁用基布８０の連続結合部４７をエアバッグ用基布７０に縫合するとともに、隔壁用基布８０の部分的中央結合部５０と縁側補助結合部６３，６４とをエアバッグ用基布７１に縫合し、エアバッグ用基布７０，７１を重ねて平らにして、外周縁７０ａ，７１ａ相互を縫合すれば、エアバッグ２３を形成することができる。なお、支持側壁部３２を構成するエアバッグ用基布７１には、予め、スリット２５と取付孔２６とを形成しておくとともに、カバー布３３を所定位置に縫合しておく。   In the airbag 23 according to the embodiment, the tether base fabrics 72, 74, and 76 are stitched to the airbag base fabric 70 using the suture 84, and the tether base fabrics 73 and 75 to the airbag base fabric 71. 77, and the tether base fabrics 72 and 73, the tether base fabrics 74 and 75, and the tether base fabrics 76 and 77 are sewn together. Are sewn to the airbag base fabric 70, and the partial central joint portion 50 and the edge side auxiliary joint portions 63 and 64 of the partition wall base fabric 80 are stitched to the airbag base fabric 71, and the airbag base fabric 70 is sewn. , 71 are overlapped and flattened, and the outer peripheral edges 70a, 71a are stitched together to form the airbag 23. The airbag base fabric 71 constituting the support side wall portion 32 is formed with slits 25 and attachment holes 26 in advance, and the cover fabric 33 is sewn in place.

その後、エアバッグ２３をケース１０に収納可能に折り畳み、インナチューブ３９に挿入させた状態の取付ブラケット１８を組付済みのインフレーター１５を、スリット２５を利用して、エアバッグ２３内に挿入する。そして、各取付ブラケット１８のボルト１９は、インナチューブ３９の取付孔３９ｄ、エアバッグ２３の取付孔２６から突出させておき、さらに、カバー布３３がスリット２５を覆えるように、カバー布３３の取付孔３３ｂを各ボルト１９に嵌めて、エアバッグ組付体を形成するとともに、ケース１０に収納し、ついで、ケース１０の開口１３を覆うようにエアバッグカバー１４をケース１０に組み付ける。そして、車両Ｖの所定位置にケース１０を配置させて、ケース１０から突出しているボルト１９を取付部２にナット２０止めし、インフレーター１５から延びる作動用の信号線を、所定の作動回路に接続すれば、エアバッグ装置Ｍを、車両Ｖに搭載することができる。   Thereafter, the airbag 23 is folded so as to be housed in the case 10, and the inflator 15 having the mounting bracket 18 in a state of being inserted into the inner tube 39 is inserted into the airbag 23 using the slit 25. The bolts 19 of each mounting bracket 18 are projected from the mounting hole 39d of the inner tube 39 and the mounting hole 26 of the airbag 23, and the cover cloth 33 covers the slit 25 so that the cover cloth 33 covers the slit 25. The mounting holes 33b are fitted into the respective bolts 19 to form an airbag assembly, housed in the case 10, and then the airbag cover 14 is assembled to the case 10 so as to cover the opening 13 of the case 10. Then, the case 10 is arranged at a predetermined position of the vehicle V, the bolt 19 protruding from the case 10 is fastened with a nut 20 to the mounting portion 2, and an operation signal line extending from the inflator 15 is connected to a predetermined operation circuit. Then, the airbag device M can be mounted on the vehicle V.

その後、インフレーター１５に作動信号が入力されれば、ガス吐出部１６から膨張用ガスＧが吐出されて、折り畳まれたエアバッグ２３が、展開膨張し、エアバッグカバー１４を押し開いて、エアバッグ２３の横膨張部２４が、フードパネル９の後端９ａの上面９ｂやカウル６・ウインドシールド４の前端４ａの上方を覆い、縦膨張部２８（Ｌ，Ｒ）がフロントピラー５の上面５ａを覆うこととなる。   Thereafter, when an operation signal is input to the inflator 15, the inflation gas G is discharged from the gas discharge unit 16, the folded airbag 23 is expanded and inflated, and the airbag cover 14 is pushed open to open the airbag. 23 of the hood panel 9 covers the upper surface 9b of the rear end 9a of the hood panel 9 and the front end 4a of the cowl 6 / windshield 4, and the vertical expansion portions 28 (L, R) cover the upper surface 5a of the front pillar 5. It will cover.

その際、図８のＡ，Ｂに示すように、縦膨張部２８付近では、隔壁４４の外周縁４５における部分的中央結合部５０の周囲のヒレ部５８が、非結合部５３，５４の部位で、膨張用ガスＧに押されて、支持側壁部３２の内周面３２ａ（下流側室４２の内周面４２ａ）から離れて、順流用流路５６の流入口５６ａ，５６ａを開口させることから、上流側室４１側の膨張用ガスＧが、ヒレ部５８と支持側壁部３２の内周面３２ａとの間において、流入口５６ａ，５６ａから後方に向かい、縁側補助結合部６３，６４の部位で方向を変えられて、縁側補助結合部６３，６４の間の一つの流出口５６ｂから後方に向けて、流出され、下流側室４２が膨張完了形状まで膨張することとなる。   At this time, as shown in FIGS. 8A and 8B, in the vicinity of the longitudinal expansion portion 28, the fin portion 58 around the partial central coupling portion 50 on the outer peripheral edge 45 of the partition wall 44 is a part of the non-coupling portions 53 and 54. Therefore, the inlet 56a, 56a of the forward flow path 56 is opened away from the inner peripheral surface 32a of the support side wall 32 (the inner peripheral surface 42a of the downstream chamber 42) by being pushed by the expansion gas G. The gas G for expansion on the upstream side chamber 41 side moves rearward from the inflow ports 56a and 56a between the fin portion 58 and the inner peripheral surface 32a of the support side wall portion 32, and at the edge side auxiliary coupling portions 63 and 64. The direction is changed, the one outlet 56b between the edge side auxiliary coupling portions 63 and 64 is flowed out rearward, and the downstream chamber 42 is expanded to the expansion completed shape.

その後、縦膨張部２８の受止側壁部３１が歩行者を受け止めれば、下流側室４２が上流側室４１より内圧を高めることとなって、下流側室４２の膨張用ガスＧが上流側室４１側へ逆流しようとするが、逆流抑制部としてのヒレ部５８が、図７のＡ，Ｂに示すように、下流側室４２の内周面４２ａ（支持側壁部３２の内周面３２ａ）に圧接されて、順流用流路５６が閉塞されることから、下流側室４２の膨張用ガスＧが上流側室４１へ逆流することが防止される。この時、隔壁４４の外周縁４５は、上流側室４１と下流側室４２との境界部位４３の内周面に対して、連続的に結合される連続結合部４７と部分的に結合される部分的結合部４９（部分的中央結合部５０）とによって、結合されており、ヒレ部５８の先端５８ａから離れた元部５８ｂ側が、上流側室４１の側に移動しようとしても、その周囲には、連続結合部４７や部分的結合部４９が配設されて、ヒレ部５８は自由にずれ移動し難い。そのため、ヒレ部５８は、ずれ移動して捲れる事態を生じさせ難いことから、安定して、下流側室４２の内周面４２ａに圧接されて、膨張用ガスＧの逆流を防止できる。   Thereafter, if the receiving side wall portion 31 of the vertical expansion portion 28 receives a pedestrian, the downstream chamber 42 increases the internal pressure more than the upstream chamber 41, and the expansion gas G in the downstream chamber 42 moves to the upstream chamber 41 side. The fin portion 58 as the backflow suppressing portion is pressed against the inner peripheral surface 42a of the downstream chamber 42 (the inner peripheral surface 32a of the support side wall portion 32) as shown in FIGS. Since the forward flow path 56 is closed, the expansion gas G in the downstream chamber 42 is prevented from flowing back to the upstream chamber 41. At this time, the outer peripheral edge 45 of the partition wall 44 is partially connected to the continuous connection portion 47 that is continuously connected to the inner peripheral surface of the boundary portion 43 between the upstream chamber 41 and the downstream chamber 42. Even if the original portion 58b side that is separated from the tip 58a of the fin portion 58 tries to move to the upstream chamber 41 side, it is continuously connected to the periphery of the fin portion 58 by the connecting portion 49 (partial central connecting portion 50). Since the coupling portion 47 and the partial coupling portion 49 are disposed, the fin portion 58 is not easily displaced and displaced. Therefore, the fin portion 58 is unlikely to cause a situation where the fin portion 58 shifts and falls, so that the fin portion 58 is stably brought into pressure contact with the inner peripheral surface 42a of the downstream side chamber 42, and the backflow of the expansion gas G can be prevented.

したがって、実施形態のエアバッグ２３では、上流側室４１と下流側室４２との間の隔壁４４が、安定して高い逆流抑制機能を確保できる。   Therefore, in the airbag 23 of the embodiment, the partition wall 44 between the upstream chamber 41 and the downstream chamber 42 can stably ensure a high backflow suppressing function.

また、実施形態のエアバッグ２３では、外周壁３０が、相互に略同一の外形形状の２枚のエアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互を結合させて構成されている。そして、隔壁４４が、１枚の隔壁用基布８０から形成されるとともに、隔壁用基布８０の両縁８０ａ，８０ｂを、２枚のエアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互の結合時に、外周縁７０ａ，７１ａ相互の間に配設させて、２枚のエアバッグ用基布７０，７１の外周縁７０ａ，７１ａに結合される縁側結合部６０，６１として、構成されている。また、隔壁４４の連続結合部４７が、隔壁用基布８０の一端８０ｃ側に配設されて、２枚のエアバッグ用基布７０，７１の一方側のエアバッグ用基布７０の内周面３１ａに結合される構成とし、隔壁４４の部分的結合部４９が、隔壁用基布８０の他端８０ｄ側に配設されて、２枚のエアバッグ用基布７０，７１の他方側のエアバッグ用基布７１の内周面３２ａ（４２ａ）側に結合されている。   In the airbag 23 of the embodiment, the outer peripheral wall 30 is configured by joining the outer peripheral edges 70a and 71a of two airbag base fabrics 70 and 71 having substantially the same outer shape. The partition wall 44 is formed of one partition base fabric 80, and both edges 80a and 80b of the partition base fabric 80 are connected to the outer peripheral edges 70a and 71a of the two airbag base fabrics 70 and 71. At the time of mutual coupling, it is configured as an edge side coupling portion 60, 61 that is disposed between the outer circumferential edges 70a, 71a and coupled to the outer circumferential edges 70a, 71a of the two airbag fabrics 70, 71. ing. Further, the continuous coupling portion 47 of the partition wall 44 is disposed on the one end 80c side of the partition wall base fabric 80, and the inner periphery of the airbag base fabric 70 on one side of the two airbag base fabrics 70, 71. The partial coupling portion 49 of the partition wall 44 is disposed on the other end 80d side of the partition wall base fabric 80, and is configured to be coupled to the surface 31a, on the other side of the two airbag base fabrics 70 and 71. The air bag base fabric 71 is coupled to the inner peripheral surface 32a (42a) side.

そのため、実施形態では、隔壁用基布８０の一端８０ｃ側を、２枚のエアバッグ用基布７０，７１の一方側の基布７０に結合させて、連続結合部４７を形成し、隔壁用基布８０の他端８０ｄ側を、２枚のエアバッグ用基布７０，７１の他方側の基布７１に結合させて、部分的結合部４９を形成し、ついで、隔壁用基布８０を間にして、２枚のエアバッグ用基布７０，７１を重ね、そして、重ねた２枚のエアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互を、縁側結合部６０，６１を形成しつつ、結合させれば、隔壁４４を設けたエアバッグ２３を形成できて、簡便に、エアバッグ２３を製造することができる。また、このように形成したエアバッグ２３では、折り畳む等の際の２枚のエアバッグ用基布７０，７１を平らに展開させた際、隔壁４４を形成する隔壁用基布８０も、２枚のエアバッグ用基布７０，７１の間で平らに展開させることができることから、嵩張らずに、かつ、折り畳み等に支障が生じ難い。   Therefore, in the embodiment, one end 80c side of the partition fabric base fabric 80 is coupled to the base fabric 70 on one side of the two airbag fabric fabrics 70, 71 to form the continuous coupling portion 47, and The other end 80d side of the base fabric 80 is connected to the base fabric 71 on the other side of the two airbag base fabrics 70, 71 to form a partial connecting portion 49, and then the partition base fabric 80 is In the middle, two airbag base fabrics 70 and 71 are overlapped, and the outer peripheral edges 70a and 71a of the two overlapped airbag base fabrics 70 and 71 are formed as edge side coupling portions 60 and 61. However, if combined, the airbag 23 provided with the partition walls 44 can be formed, and the airbag 23 can be easily manufactured. Moreover, in the airbag 23 formed in this way, when the two airbag fabrics 70 and 71 when folded are flattened, two partition fabrics 80 that form the partition 44 are also provided. Since the airbag can be flatly deployed between the airbag base fabrics 70 and 71, it is not bulky and is unlikely to cause trouble in folding or the like.

この場合、実施形態では、連続結合部４７を結合させた２枚のエアバッグ用基布７０，７１の一方の基布７０が、エアバッグ２３における保護対象物としての歩行者を受け止める受止側壁部３１とし、部分的結合部４９を結合させた２枚のエアバッグ用基布７０，７１の他方の基布７１が、エアバッグ２３の搭載部位側のフードパネル９の後端９ａ、ウインドシールド４の前縁４ａ、及び、フロントピラー５に支持される支持側壁部３２として構成されている。   In this case, in the embodiment, one of the two airbag fabrics 70, 71 combined with the continuous coupling portion 47 receives the pedestrian as a protection object in the airbag 23. The other base fabric 71 of the two airbag base fabrics 70 and 71 to which the partial connecting portion 49 is connected is the rear end 9a of the hood panel 9 on the side where the airbag 23 is mounted, the windshield 4 is configured as a support side wall portion 32 that is supported by the front edge 4 a and the front pillar 5.

そのため、実施形態では、平らに展開した隔壁用基布８０の他端８０ｄ側の部分的結合部４９が、支持側壁部３２に結合され、隔壁用基布８０の一端８０ｃ端側の連続結合部４７が、受止側壁部３１に結合される構成であって、隔壁４４の支持側壁部３２に結合される部分的結合部４９が、隔壁４４の受止側壁部３１に結合される連続結合部４７より、順流側の方向の後方側にずれて位置する状態となって、換言すれば、図７のＡに示すように、膨張時の上流側室４１と下流側室４２とを区画する隔壁４４が、上流側室４１側から見て、受止側壁部３１の内周面３１ａに対して鈍角の傾斜角度θ１で接触し、支持側壁部３２の内周面３２ａに対して鋭角の傾斜角度θ２で接触するように、配設される。そのため、膨張用ガスＧが上流側室４１から下流側室４２に向かって順流として流れる場合には、傾斜した隔壁４４に案内されて、支持側壁部３２側の非結合部５３，５４に向かい、その非結合部５３，５４の周囲のヒレ部５８を支持側壁部３２の内周面３２ａから離脱させて、容易に順流用流路５６が形成されることから、その順流用流路５６を経て、円滑に、膨張用ガスＧが下流側室４２に流れる。一方、下流側室４２の受止側壁部３１が保護対象物としての歩行者を受け止める等して、上流側室４１より下流側室４２の内圧が高まれば、傾斜した隔壁４４が、図７のＡの二点鎖線に示すように、上流側室４１側の支持側壁部３２の側に押圧され、その傾斜した隔壁４４の外周縁４５の非結合部５３，５４が、隔壁４４の押圧状態に伴なって、円滑に、下流側室４２に連なる支持側壁部３２の内周面３２ａに圧接され、さらに、非結合部５３，５４に連なるヒレ部５８も、円滑に、下流側室４２の支持側壁部３２の内周面３２ａに圧接されることから、順流用流路５６が容易に閉塞され、逆流防止状態を安定して確保できる。   Therefore, in the embodiment, the partial coupling portion 49 on the other end 80d side of the partition wall fabric 80 that is flatly spread is coupled to the support side wall portion 32, and the continuous coupling portion on the end 80c end side of the partition fabric 80. 47 is configured to be coupled to the receiving sidewall portion 31, and the partial coupling portion 49 coupled to the supporting sidewall portion 32 of the partition wall 44 is coupled to the receiving sidewall portion 31 of the partition wall 44. 47, the partition wall 44 is shifted to the rear side in the forward flow direction. In other words, as shown in FIG. 7A, the partition wall 44 that partitions the upstream chamber 41 and the downstream chamber 42 during expansion is provided. When viewed from the upstream side chamber 41 side, it contacts the inner peripheral surface 31a of the receiving side wall portion 31 at an obtuse angle of inclination θ1, and contacts the inner peripheral surface 32a of the support side wall portion 32 at an acute angle of inclination θ2. To be arranged. Therefore, when the expansion gas G flows as a forward flow from the upstream side chamber 41 toward the downstream side chamber 42, it is guided by the inclined partition wall 44 toward the non-bonding portions 53, 54 on the support side wall portion 32 side. Since the fin portion 58 around the coupling portions 53, 54 is detached from the inner peripheral surface 32 a of the support side wall portion 32, the forward flow channel 56 is easily formed. In addition, the expansion gas G flows into the downstream chamber 42. On the other hand, if the receiving side wall 31 of the downstream chamber 42 receives a pedestrian as an object to be protected and the internal pressure of the downstream chamber 42 is higher than that of the upstream chamber 41, the inclined partition wall 44 will be As shown by the dotted line, the unbonded portions 53 and 54 of the outer peripheral edge 45 of the inclined partition wall 44 are pressed toward the support side wall 32 on the upstream chamber 41 side, and the partition 44 is pressed, The fin portion 58 smoothly connected to the inner peripheral surface 32a of the support side wall portion 32 connected to the downstream side chamber 42, and further connected to the non-bonded portions 53 and 54, is also smoothly connected to the inner periphery of the support side wall portion 32 of the downstream side chamber 42. Since it is pressed against the surface 32a, the forward flow channel 56 is easily closed, and the backflow prevention state can be secured stably.

また、実施形態のエアバッグ２３では、隔壁４４が、連続結合部４７、部分的結合部４９、及び、非結合部５３，５４により囲まれる外周縁４５の部位を、隔壁４４を設けない膨張完了時のエアバッグ２３の部位（境界部位４３）の内周形状と同等として、配設されている。   Further, in the airbag 23 of the embodiment, the partition wall 44 is completely inflated without providing the partition wall 44 in the region of the outer peripheral edge 45 surrounded by the continuous coupling portion 47, the partial coupling portion 49, and the non-coupling portions 53 and 54. It is arranged as being equivalent to the inner peripheral shape of the part (boundary part 43) of the airbag 23 at the time.

そのため、実施形態では、膨張完了時のエアバッグ２３の隔壁４４が、エアバッグ２３の外周壁３０側に部分的に引っ張られずに、シワを発生させること無く、平面状態を確保し易いことから、ヒレ部５８の挙動を安定させることができて、膨張用ガスＧの順流の制御と逆流の制御とを共に円滑に実行することが可能となる。   Therefore, in the embodiment, the partition wall 44 of the airbag 23 at the completion of the inflation is not partially pulled toward the outer peripheral wall 30 side of the airbag 23, and it is easy to ensure a flat state without generating wrinkles. The behavior of the fin portion 58 can be stabilized, and both the forward flow control and the back flow control of the expansion gas G can be smoothly executed.

また、実施形態のエアバッグ２３では、隔壁４４の部分的結合部４９が、隔壁用基布８０の他端８０ｄ側における連続結合部４７の両端４７ａ，４７ｂ間の略中央付近に配設される部分的中央結合部５０として構成されて、さらに、連続結合部４７の両端４７ａ，４７ｂと部分的中央結合部５０の両端４９ａ，４９ｂとの間における隔壁用基布８０の先端８０ｄ側に、それぞれ、下流側室４２の内周面４２ａ側に結合される縁側補助結合部６３，６４が、配設されている。   Further, in the airbag 23 of the embodiment, the partial coupling portion 49 of the partition wall 44 is disposed in the vicinity of the approximate center between the both ends 47a and 47b of the continuous coupling portion 47 on the other end 80d side of the partition wall fabric 80. It is configured as a partial central joint 50, and further, on the tip 80d side of the partition fabric 80 between the both ends 47a, 47b of the continuous joint 47 and both ends 49a, 49b of the partial central joint 50, respectively. Edge side auxiliary coupling parts 63 and 64 coupled to the inner peripheral surface 42a side of the downstream chamber 42 are disposed.

そのため、実施形態では、部分的中央結合部５０の両縁４９ａ，４９ｂの非結合部５３，５４からヒレ部５８の先端５８ａに向かう位置に、縁側補助結合部６３，６４が設けられて、ヒレ部５８の捲れが規制されることから、隔壁４４は、一層、安定した逆流防止機能を確保できる。   Therefore, in the embodiment, the edge side auxiliary coupling parts 63 and 64 are provided at positions where the both ends 49a and 49b of the partial central coupling part 50 are directed from the non-coupling parts 53 and 54 toward the tip 58a of the fin part 58, and the fins are provided. Since the curling of the portion 58 is restricted, the partition wall 44 can secure a more stable backflow prevention function.

勿論、図９〜１１に示すエアバッグ２３Ａの隔壁４４Ａのように、実施形態の縁側補助結合部６３，６４を設けないように構成してもよい。なお、隔壁４４Ａは、実施形態と同様の隔壁用基布８０から構成されて、実施形態と同様のエアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互の縫合時に、両縁８０ａ，８０ｂが共縫いされ、そして、受止側壁部３１に連続結合部４７が結合され、支持側壁部３２に部分的結合部４９としての部分的中央結合部５０が結合されて、配設されている。   Of course, like the partition wall 44A of the airbag 23A shown in FIGS. 9 to 11, the edge side auxiliary coupling portions 63 and 64 of the embodiment may not be provided. The partition wall 44A is composed of a partition wall fabric 80 similar to that of the embodiment, and both edges 80a, 80b are sewn together between the outer peripheral edges 70a, 71a of the airbag fabrics 70, 71 similar to the embodiment. Are joined together, and the continuous coupling portion 47 is coupled to the receiving side wall portion 31, and the partial central coupling portion 50 as the partial coupling portion 49 is coupled to the support side wall portion 32.

このエアバッグ２３Ａでも、図１１のＡ，Ｂに示すように、上流側室４１に膨張用ガスＧが流れてくれば、隔壁４４Ａの外周縁４５における部分的中央結合部５０の周囲のヒレ部５８が、非結合部５３，５４の部位で、膨張用ガスＧに押されて、支持側壁部３２の内周面３２ａ（下流側室４２の内周面４２ａ）から離れて、順流用流路５６の流入口５６ａ，５６ａを開口させることから、上流側室４１側の膨張用ガスＧが、ヒレ部５８と支持側壁部３２の内周面３２ａとの間において、流入口５６ａ，５６ａから後方に向かって、ヒレ部５８の先端５８ａ側の大きな流出口５６ｂから後方に向けて、流出され、下流側室４２が膨張完了形状まで膨張することとなる。   Also in the airbag 23A, as shown in FIGS. 11A and 11B, if the inflation gas G flows into the upstream chamber 41, the fin portion 58 around the partial central coupling portion 50 at the outer peripheral edge 45 of the partition wall 44A. However, it is pushed by the expansion gas G at the portion of the non-bonded portions 53 and 54, and is separated from the inner peripheral surface 32 a of the support side wall portion 32 (the inner peripheral surface 42 a of the downstream side chamber 42). Since the inflow ports 56a and 56a are opened, the expansion gas G on the upstream side chamber 41 side is rearward from the inflow ports 56a and 56a between the fin portion 58 and the inner peripheral surface 32a of the support side wall portion 32. Then, it flows out rearward from the large outlet 56b on the tip 58a side of the fin portion 58, and the downstream side chamber 42 expands to the expansion completed shape.

その後、縦膨張部２８の受止側壁部３１が歩行者を受け止めれば、下流側室４２が上流側室４１より内圧を高めることとなって、下流側室４２の膨張用ガスＧが上流側室４１側へ逆流しようとするが、逆流抑制部としてのヒレ部５８が、図１０のＡ，Ｂに示すように、下流側室４２の内周面４２ａ（支持側壁部３２の内周面３２ａ）に圧接されて、順流用流路５６が閉塞されることから、下流側室４２の膨張用ガスＧが上流側室４１へ逆流することが防止される。この時、隔壁４４Ａの外周縁４５は、上流側室４１と下流側室４２との境界部位４３の内周面に対して、連続的に結合される連続結合部４７と部分的に結合される部分的結合部４９（部分的中央結合部５０）とによって、結合されており、ヒレ部５８の先端５８ａから離れた元部５８ｂ側が、上流側室４１の側に移動しようとしても、その周囲には、連続結合部４７や部分的結合部４９が配設されて、ヒレ部５８は自由にずれ移動し難い。そのため、ヒレ部５８は、ずれ移動して捲れる事態を生じさせ難いことから、安定して、下流側室４２の内周面４２ａに圧接されて、膨張用ガスＧの逆流を防止できる。   Thereafter, if the receiving side wall portion 31 of the vertical expansion portion 28 receives a pedestrian, the downstream chamber 42 increases the internal pressure more than the upstream chamber 41, and the expansion gas G in the downstream chamber 42 moves to the upstream chamber 41 side. The fin portion 58 as the backflow suppressing portion is pressed against the inner peripheral surface 42a of the downstream chamber 42 (the inner peripheral surface 32a of the support side wall portion 32) as shown in FIGS. Since the forward flow path 56 is closed, the expansion gas G in the downstream chamber 42 is prevented from flowing back to the upstream chamber 41. At this time, the outer peripheral edge 45 of the partition wall 44A is partially connected to the continuous connection portion 47 that is continuously connected to the inner peripheral surface of the boundary portion 43 between the upstream chamber 41 and the downstream chamber 42. Even if the original portion 58b side that is separated from the tip 58a of the fin portion 58 tries to move to the upstream chamber 41 side, it is continuously connected to the periphery of the fin portion 58 by the connecting portion 49 (partial central connecting portion 50). Since the coupling portion 47 and the partial coupling portion 49 are disposed, the fin portion 58 is not easily displaced and displaced. Therefore, the fin portion 58 is unlikely to cause a situation where the fin portion 58 shifts and falls, so that the fin portion 58 is stably brought into pressure contact with the inner peripheral surface 42a of the downstream side chamber 42, and the backflow of the expansion gas G can be prevented.

また、隔壁４４の外周縁４５における支持側壁部３２に結合させる部分的結合部４９としては、図１２〜１４に示すエアバッグ２３Ｂの隔壁４４Ｂのように、隔壁用基布８０の他端８０ｄ側における両縁８０ａ，８０ｂ側から延び、かつ、先端５１ａ，５２ａ相互を離して、配設される部分的縁側結合部５１，５２として構成してもよい。なお、隔壁４４Ｂは、実施形態と同様の隔壁用基布８０から構成されて、実施形態と同様のエアバッグ用基布７０，７１の外周縁７０ａ，７１ａ相互の縫合時に、両縁８０ａ，８０ｂが共縫いされ、そして、受止側壁部３１に連続結合部４７が結合され、支持側壁部３２に部分的結合部４９としての部分的縁側結合部５１，５２が結合されて、配設されている。   Moreover, as the partial coupling | bond part 49 couple | bonded with the support side wall part 32 in the outer periphery 45 of the partition 44, like the partition 44B of the airbag 23B shown to FIGS. Further, it may be configured as partial edge side coupling portions 51 and 52 that extend from both edges 80a and 80b side and are spaced apart from the tips 51a and 52a. The partition wall 44B is composed of a partition wall fabric 80 similar to that of the embodiment, and both edges 80a and 80b are sewn together between the outer peripheral edges 70a and 71a of the airbag fabric 70 and 71 similar to the embodiment. Are coupled together, and the continuous coupling portion 47 is coupled to the receiving side wall portion 31, and the partial edge side coupling portions 51 and 52 as the partial coupling portion 49 are coupled to the support side wall portion 32. Yes.

このエアバッグ２３Ｂでも、図１４のＡ，Ｂに示すように、上流側室４１に膨張用ガスＧが流れてくれば、隔壁４４Ｂの外周縁４５における部分的縁側結合部５１，５２の周囲のヒレ部５８が、先端５１ａ，５２ａ相互の間の非結合部５５の部位で、膨張用ガスＧに押されて、支持側壁部３２の内周面３２ａ（下流側室４２の内周面４２ａ）から離れて、順流用流路５６の流入口５６ａを開口させることから、上流側室４１側の膨張用ガスＧが、ヒレ部５８と支持側壁部３２の内周面３２ａとの間において、流入口５６ａから後方に向かって、ヒレ部５８の先端５８ａ側の大きな流出口５６ｂから後方に向けて、流出され、下流側室４２が膨張完了形状まで膨張することとなる。   Also in the airbag 23B, as shown in FIGS. 14A and 14B, if the inflation gas G flows into the upstream chamber 41, fins around the partial edge side coupling portions 51 and 52 at the outer peripheral edge 45 of the partition wall 44B. The portion 58 is pushed away from the inner peripheral surface 32a of the support side wall portion 32 (the inner peripheral surface 42a of the downstream chamber 42) by being pushed by the inflation gas G at the portion of the non-bonded portion 55 between the tips 51a and 52a. Since the inflow port 56a of the forward flow channel 56 is opened, the expansion gas G on the upstream chamber 41 side passes from the inflow port 56a between the fin portion 58 and the inner peripheral surface 32a of the support side wall portion 32. Backward, it flows out from the large outlet 56b on the tip 58a side of the fin portion 58 toward the rear, and the downstream chamber 42 expands to the expansion completed shape.

その後、縦膨張部２８の受止側壁部３１が歩行者を受け止めれば、下流側室４２が上流側室４１より内圧を高めることとなって、下流側室４２の膨張用ガスＧが上流側室４１側へ逆流しようとするが、逆流抑制部としてのヒレ部５８が、図１３のＡ，Ｂに示すように、下流側室４２の内周面４２ａ（支持側壁部３２の内周面３２ａ）に圧接されて、順流用流路５６が閉塞されることから、下流側室４２の膨張用ガスＧが上流側室４１へ逆流することが防止される。この時、隔壁４４Ｂの外周縁４５は、上流側室４１と下流側室４２との境界部位４３の内周面に対して、連続的に結合される連続結合部４７と部分的に結合される部分的結合部４９（部分的縁側結合部５１，５２）とによって、結合されており、ヒレ部５８の先端５８ａから離れた元部５８ｂ側が、上流側室４１の側に移動しようとしても、その周囲には、連続結合部４７や部分的結合部４９が配設されて、ヒレ部５８は自由にずれ移動し難い。そのため、ヒレ部５８は、ずれ移動して捲れる事態を生じさせ難いことから、安定して、下流側室４２の内周面４２ａに圧接されて、膨張用ガスＧの逆流を防止できる。   Thereafter, if the receiving side wall portion 31 of the vertical expansion portion 28 receives a pedestrian, the downstream chamber 42 increases the internal pressure more than the upstream chamber 41, and the expansion gas G in the downstream chamber 42 moves to the upstream chamber 41 side. The fin portion 58 as the backflow suppressing portion is pressed against the inner peripheral surface 42a of the downstream side chamber 42 (the inner peripheral surface 32a of the support side wall portion 32) as shown in FIGS. Since the forward flow path 56 is closed, the expansion gas G in the downstream chamber 42 is prevented from flowing back to the upstream chamber 41. At this time, the outer peripheral edge 45 of the partition wall 44B is partially connected to the continuous connection portion 47 that is continuously connected to the inner peripheral surface of the boundary portion 43 between the upstream chamber 41 and the downstream chamber 42. Even if the original part 58b side away from the tip 58a of the fin part 58 tries to move to the upstream side chamber 41 side, it is joined by the joint part 49 (partial edge side joint parts 51, 52). In addition, the continuous coupling portion 47 and the partial coupling portion 49 are provided, and the fin portion 58 is not easily displaced. Therefore, the fin portion 58 is unlikely to cause a situation where the fin portion 58 shifts and falls, so that the fin portion 58 is stably brought into pressure contact with the inner peripheral surface 42a of the downstream side chamber 42, and the backflow of the expansion gas G can be prevented.

また、部分的縁側結合部５１，５２を設ける場合には、図１５〜１７に示すエアバッグ２３Ｃのように構成してもよい。このエアバッグ２３Ｃでは、部分的縁側結合部５１，５２の周囲に配設されるヒレ部５８Ｃが、幅寸法Ｗ１を、部分的縁側結合部５１，５２間の離隔距離ＳＬと同等として、隔壁用基布８０Ｃの他端８０ｄ側における部分的縁側結合部５１，５２間から離れる先端５８ａ側に、下流側室４２の内周面４２ａ（３２ａ）側に結合される中央側補助結合部６５、を配設させて構成されている。なお、このエアバッグ２３Ｃは、ヒレ部５８Ｃが、先端５８ａ付近の幅寸法Ｗ１を狭くし、中央側補助結合部６５を支持側壁部３２に結合させている点が、図１２〜１４に示すエアバッグ２３Ｂと異なっているだけである。   Moreover, when providing the partial edge side coupling | bond parts 51 and 52, you may comprise like the airbag 23C shown to FIGS. In the airbag 23C, the fin portion 58C disposed around the partial edge side coupling portions 51 and 52 has the width dimension W1 equal to the separation distance SL between the partial edge side coupling portions 51 and 52, and is used for the partition wall. A central auxiliary coupling portion 65 coupled to the inner peripheral surface 42a (32a) side of the downstream chamber 42 is disposed on the distal end 58a side away from between the partial edge side coupling portions 51 and 52 on the other end 80d side of the base fabric 80C. It is configured. The airbag 23C has a fin portion 58C having a narrow width dimension W1 in the vicinity of the tip 58a and the center side auxiliary coupling portion 65 coupled to the support side wall portion 32 as shown in FIGS. Only the bag 23B is different.

このエアバッグ２３Ｃでも、図１７のＡ，Ｂに示すように、上流側室４１に膨張用ガスＧが流れてくれば、隔壁４４Ｃの外周縁４５における部分的縁側結合部５１，５２の周囲のヒレ部５８が、先端５１ａ，５２ａ間の非結合部５５の部位で、膨張用ガスＧに押されて、支持側壁部３２の内周面３２ａ（下流側室４２の内周面４２ａ）から離れて、順流用流路５６の流入口５６ａを開口させることから、上流側室４１側の膨張用ガスＧが、ヒレ部５８と支持側壁部３２の内周面３２ａとの間において、流入口５６ａから後方に向かい、そして、部分的縁側結合部５１の先端５１ａと中央側補助結合部６５の端部６５ａとの間、及び、部分的縁側結合部５２の先端５２ａと中央側補助結合部６５の端部６５ｂとの間、の二つの流出口５６ｂ，５６ｂから後方に向けて、流出され、下流側室４２が膨張完了形状まで膨張することとなる。   Also in the airbag 23C, as shown in FIGS. 17A and 17B, if the inflation gas G flows into the upstream chamber 41, fins around the partial edge side coupling portions 51 and 52 at the outer peripheral edge 45 of the partition wall 44C. The portion 58 is pushed by the inflation gas G at the portion of the non-bonded portion 55 between the tips 51a and 52a, and is separated from the inner peripheral surface 32a of the support side wall portion 32 (the inner peripheral surface 42a of the downstream chamber 42), Since the inflow port 56a of the forward flow path 56 is opened, the expansion gas G on the upstream side chamber 41 side is rearward from the inflow port 56a between the fin portion 58 and the inner peripheral surface 32a of the support side wall portion 32. Opposite and between the tip 51a of the partial edge-side coupling portion 51 and the end portion 65a of the central side auxiliary coupling portion 65, and the tip 52a of the partial edge-side coupling portion 52 and the end portion 65b of the central side auxiliary coupling portion 65 Between the two outlets 56b, 5 From b backward, to flow out, the downstream side chamber 42 is able to expand to completely inflated shape.

その後、縦膨張部２８の受止側壁部３１が歩行者を受け止めれば、下流側室４２が上流側室４１より内圧を高めることとなって、下流側室４２の膨張用ガスＧが上流側室４１側へ逆流しようとするが、逆流抑制部としてのヒレ部５８Ｃが、図１６のＡ，Ｂに示すように、下流側室４２の内周面４２ａ（支持側壁部３２の内周面３２ａ）に圧接されて、順流用流路５６が閉塞されることから、下流側室４２の膨張用ガスＧが上流側室４１へ逆流することが防止される。この時、隔壁４４Ｃの外周縁４５は、上流側室４１と下流側室４２との境界部位４３の内周面に対して、連続的に結合される連続結合部４７と部分的に結合される部分的結合部４９（部分的縁側結合部５１，５２）とによって、結合されており、ヒレ部５８Ｃの先端５８ａから離れた元部５８ｂ側が、上流側室４１の側に移動しようとしても、その周囲には、連続結合部４７や部分的結合部４９（部分的縁側結合部５１，５２）が配設されて、ヒレ部５８Ｃは自由にずれ移動し難い。そのため、ヒレ部５８Ｃは、ずれ移動して捲れる事態を生じさせ難いことから、安定して、下流側室４２の内周面４２ａに圧接されて、膨張用ガスＧの逆流を防止できる。   Thereafter, if the receiving side wall portion 31 of the vertical expansion portion 28 receives a pedestrian, the downstream chamber 42 increases the internal pressure more than the upstream chamber 41, and the expansion gas G in the downstream chamber 42 moves to the upstream chamber 41 side. As shown in FIGS. 16A and 16B, the fin portion 58C serving as the backflow suppressing portion is pressed against the inner peripheral surface 42a of the downstream chamber 42 (the inner peripheral surface 32a of the support side wall portion 32). Since the forward flow path 56 is closed, the expansion gas G in the downstream chamber 42 is prevented from flowing back to the upstream chamber 41. At this time, the outer peripheral edge 45 of the partition wall 44C is partially coupled to the continuous coupling portion 47 that is continuously coupled to the inner peripheral surface of the boundary portion 43 between the upstream chamber 41 and the downstream chamber 42. Even if the original portion 58b side that is separated from the tip 58a of the fin portion 58C is moved to the upstream chamber 41 side, it is connected by the connecting portion 49 (partial edge side connecting portions 51, 52). In addition, the continuous coupling portion 47 and the partial coupling portion 49 (partial edge side coupling portions 51 and 52) are provided, and the fin portion 58C is not easily displaced and displaced. For this reason, the fin portion 58C is unlikely to cause a situation where the fin portion 58C slips and moves, so that the fin portion 58C can be stably brought into pressure contact with the inner peripheral surface 42a of the downstream chamber 42 to prevent the backflow of the expansion gas G.

そしてさらに、このエアバッグ２３Ｃでは、ヒレ部５８Ｃの幅寸法Ｗ１を小さくでき、隔壁用基布８０Ｃの使用材料を少なくできて、隔壁４４Ｃの折り畳み時の容積を小さくできる。なお、ヒレ部５８Ｃが、幅寸法Ｗ１を小さくしても、先端５８ａ側を、中央側補助結合部６５により、下流側室４２の内周面４２ａ（３２ａ）側に結合させていることから、捲れ難く、隔壁４４Ｃは、安定した逆流防止機能を確保できる。   Further, in the airbag 23C, the width dimension W1 of the fin portion 58C can be reduced, the amount of material used for the partition fabric 80C can be reduced, and the volume of the partition 44C when folded can be reduced. Even though the fin portion 58C has a small width dimension W1, the tip 58a side is coupled to the inner peripheral surface 42a (32a) side of the downstream chamber 42 by the center side auxiliary coupling portion 65, so It is difficult, and the partition wall 44C can secure a stable backflow prevention function.

なお、逆流抑制部としてのヒレ部を有した隔壁を２枚のエアバッグ用基布の外周縁相互の間に配設される構成としては、エアバッグの全域の外周壁が、２枚のエアバッグ用基布で構成される必要は無く、少なくとも、隔壁を配設する部位だけを、２枚のエアバッグ用基布によって構成すればよい。   As a configuration in which the partition wall having the fin portion as the backflow suppressing portion is disposed between the outer peripheral edges of the two airbag base fabrics, the outer peripheral wall of the entire area of the airbag has two air bags. It is not necessary to be constituted by the base fabric for the bag, and at least the portion where the partition wall is disposed may be constituted by two airbag base fabrics.

また、本発明のエアバッグは、実施形態のように、歩行者用エアバッグ装置Ｍに使用するエアバッグに限定されず、膝保護用エアバッグ装置やサイドエアバッグ装置等のエアバッグに適用してもよい。   Further, the airbag of the present invention is not limited to the airbag used in the pedestrian airbag apparatus M as in the embodiment, and is applied to airbags such as knee protection airbag apparatuses and side airbag apparatuses. May be.

さらに、実施形態の連続結合部や部分的結合部の結合は、隔壁の外周縁に沿って線状に連なるように縫合することにより、行ったが、縫合の他、接着や溶着等により、隔壁の外周縁をエアバッグの内周面に結合させてもよい。また、縫合して結合する場合、例えば、部分的結合部では、外周縁に沿って連なる線状に縫合する他、隔壁の外周縁と直交する短い縫合部位を、隔壁の外周縁に沿って、並設させるようにして、構成してもよい。   Furthermore, the continuous coupling part and the partial coupling part of the embodiment are joined by stitching so as to be linearly connected along the outer peripheral edge of the partition wall. The outer peripheral edge may be coupled to the inner peripheral surface of the airbag. In addition, in the case of binding by stitching, for example, in a partial coupling portion, in addition to stitching in a line continuous along the outer peripheral edge, a short suture site orthogonal to the outer peripheral edge of the partition wall, along the outer peripheral edge of the partition wall, You may comprise so that it may arrange in parallel.

２３，２３Ａ，２３Ｂ，２３Ｃ…エアバッグ、３０…外周壁、３１…受止側壁部、３１ａ…内周面、３２…支持側壁部、３２ａ…内周面、４１…上流側室、
４２（Ｌ，Ｒ）…下流側室、４２ａ…内周面、４３…境界部位、４４，４４Ａ，４４Ｂ，４４Ｃ…隔壁、４５…外周縁、４７…連続結合部、４９…部分的結合部、５０…部分的中央結合部、５１，５２…部分的縁側結合部、５３，５４，５５…非結合部、５６…順流用流路、５８，５８Ｃ…（逆流抑制部）ヒレ部、６０，６１…縁側結合部、６３，６４…縁側補助結合部、６５…中央側補助結合部、７０，７１…エアバッグ用基布、７０ａ，７１ａ…外周縁、８０，８０Ｃ…隔壁用基布、８０ａ，８０ｂ…縁、８０ｃ…（一端）元部端、８０ｄ…（他端）先端、Ｇ…膨張用ガス。 23, 23A, 23B, 23C ... airbag, 30 ... outer peripheral wall, 31 ... receiving side wall, 31a ... inner peripheral surface, 32 ... support side wall, 32a ... inner peripheral surface, 41 ... upstream chamber,
42 (L, R): downstream chamber, 42a: inner peripheral surface, 43: boundary portion, 44, 44A, 44B, 44C ... partition wall, 45 ... outer peripheral edge, 47 ... continuous joint portion, 49 ... partial joint portion, 50 ... Partial center coupling part, 51,52 ... Partial marginal side coupling part, 53,54,55 ... Non-coupling part, 56 ... Forward flow channel, 58,58C ... (Backflow suppression part) Fin part, 60,61 ... Edge side coupling part, 63, 64 ... edge side auxiliary coupling part, 65 ... center side auxiliary coupling part, 70, 71 ... base fabric for airbag, 70a, 71a ... outer peripheral edge, 80, 80C ... base fabric for partition wall, 80a, 80b ... Rim, 80c ... (one end) base end, 80d ... (other end) tip, G ... expansion gas.

Claims (8)

膨張用ガスの流れの上流側の上流側室と下流側の下流側室との間に、前記上流側室から前記下流側室への膨張用ガスの順流を許容し、前記下流側室から前記上流側室への膨張用ガスの逆流を抑制可能な逆流抑制部を有した隔壁、が配設されて構成されるエアバッグであって、
前記隔壁の外周縁が、
前記エアバッグにおける前記上流側室と前記下流側室との間の境界部位の内周面に対して連続的に結合される連続結合部と、
前記連続結合部の両端の間における前記上流側室と前記下流側室との間の境界部位の内周面に対して、部分的に結合される部分的結合部と、
前記部分的結合部の周囲で、前記下流側室の内周面に圧接可能として、前記上流側室と前記下流側室との間の前記境界部位に沿うように配設されるヒレ部と、
を備えて構成され、
前記ヒレ部が、順流時に、前記下流側室の内周面から離脱させ、前記隔壁の外周縁における前記連続結合部と前記部分的結合部との前記境界部位の内周面に結合されていない非結合部の部位を経て流れる膨張用ガスの順流用流路を形成して、膨張用ガスの順流を許容し、逆流時に、前記下流側室の内周面に圧接させ、前記順流用流路を閉塞して、膨張用ガスの逆流を抑制する逆流抑制部、を構成していることを特徴とするエアバッグ。 Between the upstream chamber on the upstream side of the flow of the expansion gas and the downstream chamber on the downstream side, the forward flow of the expansion gas from the upstream chamber to the downstream chamber is allowed, and the expansion from the downstream chamber to the upstream chamber is allowed. A partition wall having a backflow suppressing portion capable of suppressing backflow of working gas,
The outer peripheral edge of the partition wall is
A continuous coupling portion continuously coupled to an inner peripheral surface of a boundary portion between the upstream chamber and the downstream chamber in the airbag;
A partial coupling portion that is partially coupled to an inner peripheral surface of a boundary portion between the upstream chamber and the downstream chamber between both ends of the continuous coupling portion;
A fin portion disposed so as to be along the boundary portion between the upstream chamber and the downstream chamber, capable of being pressed against the inner peripheral surface of the downstream chamber around the partial coupling portion,
Configured with
The fin portion is separated from the inner circumferential surface of the downstream chamber at the time of forward flow, and is not coupled to the inner circumferential surface of the boundary portion between the continuous coupling portion and the partial coupling portion on the outer circumferential edge of the partition wall. A flow path for the forward flow of the expansion gas flowing through the coupling portion is formed to allow the forward flow of the expansion gas, and at the time of the reverse flow, it is brought into pressure contact with the inner peripheral surface of the downstream chamber, thereby closing the forward flow path. And the backflow suppression part which suppresses the backflow of the gas for expansion is comprised, The airbag characterized by the above-mentioned. 少なくとも前記下流側室と前記下流側室近傍の前記上流側室との部位の前記エアバッグの外周壁が、相互に略同一の外形形状の２枚のエアバッグ用基布の外周縁相互を結合させて構成され、
前記隔壁が、
１枚の隔壁用基布から形成されるとともに、
該隔壁用基布の両縁を、２枚の前記エアバッグ用基布の外周縁相互の結合時に、前記外周縁相互の間に配設させて、２枚の前記エアバッグ用基布の外周縁に結合される縁側結合部として、構成され、
前記隔壁の前記連続結合部が、前記隔壁用基布の一端側に配設されて、２枚の前記エアバッグ用基布の一方側の内周面側に結合される構成とし、
前記隔壁の前記部分的結合部が、前記隔壁用基布の他端側に配設されて、２枚の前記エアバッグ用基布の他方側の内周面側に結合されていることを特徴とする請求項１に記載のエアバッグ。 The outer peripheral wall of the airbag at least at the portion of the downstream chamber and the upstream chamber in the vicinity of the downstream chamber is formed by connecting the outer peripheral edges of two airbag fabrics having substantially the same outer shape. And
The partition is
While being formed from a single partition wall fabric,
Both edges of the base fabric for partition walls are disposed between the outer peripheral edges of the two airbag base fabrics when they are joined to each other. It is configured as an edge-side joint that is joined to the periphery,
The continuous coupling portion of the partition wall is disposed on one end side of the partition wall fabric, and is configured to be coupled to one inner peripheral surface side of the two airbag fabrics,
The partial coupling portion of the partition wall is disposed on the other end side of the partition wall fabric and is coupled to the other inner peripheral surface side of the two airbag fabrics. The airbag according to claim 1. 前記連続結合部を結合させた２枚の前記エアバッグ用基布の一方が、前記エアバッグにおける保護対象物を受け止める受止側壁部とし、
前記部分的結合部を結合させた２枚の前記エアバッグ用基布の他方が、前記エアバッグの搭載部位側に支持される支持側壁部として構成されていることを特徴とする請求項２に記載のエアバッグ。 One of the two airbag fabrics combined with the continuous connecting portion is a receiving side wall for receiving a protection object in the airbag,
3. The other side of the two airbag fabrics combined with the partial coupling portion is configured as a supporting side wall portion supported on the side of the airbag mounting portion. The described airbag. 前記隔壁が、前記連続結合部、前記部分的結合部、及び、前記非結合部により囲まれる外周縁の部位を、前記隔壁を設けない膨張完了時の前記エアバッグの部位の内周形状と同等として、配設されていることを特徴とする請求項１乃至請求項３のいずれか１項に記載のエアバッグ。   The outer peripheral portion surrounded by the continuous connecting portion, the partial connecting portion, and the non-connecting portion is equivalent to the inner peripheral shape of the portion of the airbag when the inflation is completed without providing the partition. The air bag according to any one of claims 1 to 3, wherein the air bag is disposed. 前記隔壁の前記部分的結合部が、前記隔壁用基布の他端側における前記連続結合部の両端間の略中央付近に配設される部分的中央結合部として構成されていることを特徴とする請求項２乃至請求項４のいずれか１項に記載のエアバッグ。   The partial coupling portion of the partition is configured as a partial central coupling portion disposed near the center between both ends of the continuous coupling portion on the other end side of the partition fabric. The airbag according to any one of claims 2 to 4. 前記連続結合部の両端と前記部分的中央結合部の両端との間における前記隔壁用基布の先端側に、それぞれ、前記下流側室の内周面側に結合される縁側補助結合部が、配設されていることを特徴とする請求項５に記載のエアバッグ。   Edge side auxiliary coupling portions that are coupled to the inner peripheral surface side of the downstream chamber are respectively arranged on the leading end side of the partition wall fabric between both ends of the continuous coupling portion and both ends of the partial central coupling portion. The airbag according to claim 5, wherein the airbag is provided. 前記隔壁の前記部分的結合部が、前記隔壁用基布の他端側における両縁側から延び、かつ、先端相互を離して、配設される部分的縁側結合部として構成されていることを特徴とする請求項２乃至請求項４のいずれか１項に記載のエアバッグ。   The partial coupling portion of the partition wall is configured as a partial edge side coupling portion that extends from both edge sides on the other end side of the partition wall fabric and that is disposed apart from the tip. The airbag according to any one of claims 2 to 4. 前記部分的縁側結合部の周囲に配設されるヒレ部が、
幅寸法を、前記部分的縁側結合部間の離隔距離と同等として、
前記隔壁用基布の他端側における前記部分的縁側結合部間から離れる先端側に、前記下流側室の内周面側に結合される中央側補助結合部、を配設させて構成されていることを特徴とする請求項７に記載のエアバッグ。 A fin portion disposed around the partial marginal coupling portion,
The width dimension is equivalent to the separation distance between the partial edge side joints,
A central auxiliary coupling portion coupled to the inner peripheral surface side of the downstream chamber is disposed on the distal end side away from between the partial edge side coupling portions on the other end side of the partition wall fabric. The airbag according to claim 7.
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WO2011132316A1 (en) * 2010-04-23 2011-10-27 トヨタ自動車株式会社 Vehicle side airbag device
JP2014037156A (en) * 2012-08-10 2014-02-27 Toyota Motor Corp Side airbag device for vehicle
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