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JP3642833B2 - Bag structure of airbag device - Google Patents

Bag structure of airbag device Download PDF

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Publication number
JP3642833B2
JP3642833B2 JP18638695A JP18638695A JP3642833B2 JP 3642833 B2 JP3642833 B2 JP 3642833B2 JP 18638695 A JP18638695 A JP 18638695A JP 18638695 A JP18638695 A JP 18638695A JP 3642833 B2 JP3642833 B2 JP 3642833B2
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JP
Japan
Prior art keywords
bag body
sewing
base fabric
base
bag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP18638695A
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Japanese (ja)
Other versions
JPH0911845A (en
Inventor
昌史 榊田
泰樹 西岡
智司 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ashimori Industry Co Ltd
Mazda Motor Corp
Original Assignee
Ashimori Industry Co Ltd
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ashimori Industry Co Ltd, Mazda Motor Corp filed Critical Ashimori Industry Co Ltd
Priority to JP18638695A priority Critical patent/JP3642833B2/en
Publication of JPH0911845A publication Critical patent/JPH0911845A/en
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Classifications

    • 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
    • B60R21/235—Inflatable members characterised by their material
    • B60R2021/23571—Inflatable members characterised by their material characterised by connections between panels
    • B60R2021/23576—Sewing
    • 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
    • B60R21/239—Inflatable members characterised by their venting means

Landscapes

  • Air Bags (AREA)

Description

【０００１】
【産業上の利用分野】
本発明は、衝突時における乗員を保護するエアバッグ装置の袋体構造に関するものである。
【０００２】
【従来の技術】
衝突による衝撃を吸収して乗員を保護するために、エアバッグ装置が提供されている。
従来、かかるエアバッグ装置の袋体構造として、特開平５−１６７５１号公報に開示されたものが提供されている。このものにおいては、インフレータで発生したガスの排気穴は、基布に複数個の穴を開けることによって設けられていた。
【０００３】
【発明が解決しようとする課題】
前記従来例においては、基布に複数個の排気穴を設けるものであるために、排気穴の形成と共に、排気穴の周縁部に補強布を縫製する必要があり、袋体の作製工程及び部品数が多くなるという問題点を有していた。
また、排気穴周縁部に補強布縫製部があるので、袋体の厚みや強度が部分的に異なり、袋体が折り畳みにくいという欠点をも有していた。
【０００４】
本発明は、従来の技術の有するこのような問題点に鑑みてなされたものであり、その目的とするところは、袋体の製作が容易で、袋体の折り畳みがし易いエアバッグ装置の袋体構造を提供しようとするものである。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、本発明におけるエアバッグ装置の袋体構造は、複数の基布より成り、それらの基布の周縁部を縫製して縫製部を形成した袋体において、
該袋体は、乗員とドア内壁との間でドア内壁に沿いながら展開する側突用のエアバッグを構成するものであり、
インフレータに取り付けるための開口部と、該開口部と対向する上記基布の周縁部の一部に縫製しない部分を設けてインフレータで発生するガスの排気穴としてある。
そして、縫製部の縫製端を基布の周縁側に返し縫い部を形成してある。
【０００６】
また、複数の基布より成り、それらの基布の周縁部を縫製して縫製部を形成した袋体において、
互いに縫製されるいずれか一方の基布の周縁部の一部に切欠部を形成してあり、切欠部を形成した部位において他方の基布の周縁部のみが縫製され、
前記切欠部を排気穴としてある。
【０００７】
【作用】
複数の基布より成り、それらの基布の周縁部を縫製して縫製部を形成した袋体において、周縁部の一部に縫製しない部分を設けてあり、この部分がインフレータで発生するガスの排気穴を構成するので、袋体に特別な排気穴を形成する必要がなく、袋体の作製工程が簡単となる。
そして、縫製部の縫製端を基布の周縁側に返し縫い部を形成すると、排気穴がほつれることがない。
【０００８】
また、基布の周縁部の一部に切欠部を形成すると、基布を重ね合わせ、周縁部を縫製することにより、切欠部が縫製されずに排気穴を構成することとなる。
【０００９】
【実施例】
実施例について図面を参照して説明する。
図１は袋体が膨張展開した状態の車室内を示す図、図２は基布の縫製状態（袋体の反転前）の正面図、図３は袋体の取付時（反転後）の斜視図、図４は第２実施例の基布の縫製状態（反転前）の正面図、図５は第３実施例の袋体の２枚の基布を示す図、図６は第３実施例の袋体の基布の縫製状態（反転前）の正面図、図７は助手席用の袋体に本発明を適用した実施例の斜視図、図８ａは運転席用の袋体に本発明を適用した実施例の背面図、図８ｂは図８ａの底面図である。
【００１０】
本発明は、エアバッグ装置の袋体構造に係り、側突用の袋体に適用してもよいし、運転席用や助手席用の袋体として適用してもよい。
図１には側突用のものを示してあり、１１は車体側部を形成するドアであり、１２はドア１１の車室側部分に突出形成されたアームレストである。
また、１３はシートの座部を構成するシートクッションであり、１４はシートの背もたれ部を構成するシートバックである。なお、１５は、シートバック１４の頂部に上下動可能に設けられたヘッドレストである。
【００１１】
１６は、シートバック１４のドア１１側の側面部に形成されている収納空間１７内に嵌入したエアバッグ装置のハウジングである。ドア１１側のハウジング１６の側部には開口を設けてあり、この開口はリッド１８により通常時は閉塞されている。
また、ハウジング１６は、シートクッション１３のドア１１側の側面部に構成してもよい。
【００１２】
ハウジング１６内には、インフレータ（図示せず）及び折り畳まれた袋体２０が収納されている。
側突検知センサ（図示せず）によって側突が検知されるとインフレータが起爆し、インフレータに取り付けられた袋体２０内にガスが充填され、袋体２０が展開膨張するようになっている。そして、リッド１８が回動して袋体２０はリッド１８により展開方向が規制され、図１に示すように、ドア１１内壁に沿いながら展開していくこととなる。
【００１３】
袋体２０は、複数の基布より成り、それらの基布の周縁部を縫製して縫製部を形成してある。
例えば、袋体２０は、略四角形状を呈する第１基布２１と第２基布２２との２枚の基布の周縁部を縫合した後、第１基布２１の一端部に設けたインフレータに取り付けるための開口部２３から反転させることにより形成してある。
これらの基布２１，２２は、ゴム或いは合成樹脂をコーティングした織布を用いてもよいし、単なる織布を用いてもよい。
【００１４】
図２に示す実施例においては、袋体２０は、同形状の第１基布２１と第２基布２２とを上下に重ね合わせた状態で、その周縁部を縫製して縫製部２４を形成して袋状に構成すると共に、一部に縫製しない部分を設けて作製してある。
そして、この縫製しない部分を、インフレータで発生したガスの排気穴２５としてある。この縫製しない部分（排気穴２５）の大きさは、所望に応じて定めればよい。
その後、図３に示すように、開口部２３より基布２１，２２を反転させることにより、袋体２０が形成される。
【００１５】
図４に示す実施例においては、袋体２０は、同形状の第１基布２１と第２基布２２とを上下に重ね合わせた状態で、その周縁部を縫製して縫製部２４を形成して袋状に構成すると共に、一部に縫製しない部分を設けて作製してある。
そして、縫製部２４のいずれか一方あるいは両方の縫製端を基布の周縁側に縫製部２４に対し鋭角に返し縫い部２６を形成して止め縫いを行い、縫製端部に大きな圧力が加わってもほつれないようにしてある。
その後、開口部２３より基布２１，２２を反転させることにより、袋体２０が形成される。
【００１６】
図５に示す実施例においては、第１基布２１と第２基布２２との形状を若干異ならしめてある。
即ち、いずれか一方の基布、図示例では第２基布２２の周縁部の一部に切欠部２７を形成してある。そして、図６に示すように、袋体２０は、第１基布２１と第２基布２２とを上下に重ね合わせた状態で、その周縁部を縫製して縫製部２４を形成して袋状に作製してあり、切欠部２７は縫製されずに排気穴２５を構成することとなる。
その後、開口部２３より基布２１，２２を反転させることにより、袋体２０が形成される。
【００１７】
本発明においては、ハウジング１６内に折り畳まれて収納されている袋体２０は、側突時には乗員とドア１１との間でリッド１８に規制されつつ展開膨張することとなる。
そして、インフレータで発生したガスは、排気穴２５より流出することとなる。
【００１８】
上記実施例では、本発明を側突用のエアバッグ装置に適用して説明したが、図７に示すように助手席用エアバッグ装置や、図８ａ及び図８ｂに示すように運転席用エアバッグ装置にも適用することができる。
尚、エアバッグを構成する基布は、袋体の形状に応じて、所望の基布形状及び枚数で構成すればよいが、排気穴２５は、いずれの場合においても、乗員に直接ガスが当たらない位置に設けるのが好ましい。
【００１９】
【発明の効果】
本発明は、上述のとおり構成されており、袋体の周縁部の一部に縫製しない部分を設けてガスの排気穴を構成してあるので、袋体に特別に排気穴を形成する必要がなく、袋体の作製工程が簡単となる。また、排気穴周縁部に補強布を設ける必要がないので、袋体の折り畳みも容易となる。
そして、縫製部の縫製端を基布の周縁側に返し縫い部を形成することにより、縫製部の縫製端部の強度を上げることができると共に、排気穴の大きさが変化しないようにすることができる。排気穴の大きさが変化すると、人体への拘束性も変化するが、本発明によればかかることがない。
【００２０】
また、基布の周縁部の一部に切欠部を形成すると、切欠部が縫製されずに排気穴を構成することとなるので、縫製強度を安定させると共に、袋体の作製作業を容易とすることができる。
【図面の簡単な説明】
【図１】袋体の膨張展開時の車室内を示す図である。
【図２】基布の縫製状態（袋体の反転前）の正面図である。
【図３】袋体の取付時（反転後）の斜視図である。
【図４】第２実施例の基布の縫製状態（反転前）の正面図である。
【図５】第３実施例の袋体の２枚の基布を示す図であり、（ａ）は第１基布の正面図、（ｂ）は第２基布の正面図である。
【図６】第３実施例の袋体の基布の縫製状態（反転前）の正面図である。
【図７】助手席用の袋体に本発明を適用した実施例の斜視図である。
【図８ａ】運転席用の袋体に本発明を適用した実施例の背面図である。
【図８ｂ】図８ａの実施例の底面図である。
【符号の説明】
２０ 袋体
２１ 第１基布
２２ 第２基布
２４ 縫製部
２５ 排気穴
２６ 返し縫い部
２７ 切欠部[0001]
[Industrial application fields]
The present invention relates to a bag structure of an airbag device that protects an occupant during a collision.
[0002]
[Prior art]
An airbag device is provided to absorb a shock caused by a collision and protect an occupant.
Conventionally, as a bag structure of such an airbag device, one disclosed in JP-A-5-16751 has been provided. In this device, the exhaust holes for the gas generated by the inflator are provided by making a plurality of holes in the base fabric.
[0003]
[Problems to be solved by the invention]
In the conventional example, since a plurality of exhaust holes are provided in the base cloth, it is necessary to sew a reinforcing cloth on the peripheral portion of the exhaust holes together with the formation of the exhaust holes. The problem was that the number increased.
In addition, since the reinforcing cloth sewing portion is provided at the peripheral portion of the exhaust hole, the thickness and strength of the bag body are partially different, and the bag body is also difficult to fold.
[0004]
The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a bag for an airbag device in which a bag body can be easily manufactured and the bag body can be easily folded. It is intended to provide a body structure.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the bag structure of the airbag device according to the present invention is composed of a plurality of base fabrics, and in the bag body formed by sewing the peripheral portions of the base fabrics to form a sewing portion.
The bag body constitutes a side-impact airbag that expands along the door inner wall between the occupant and the door inner wall,
An opening for attaching to the inflator and a portion not sewn on a part of the peripheral edge of the base fabric facing the opening are provided as exhaust holes for gas generated in the inflator.
And the sewing end of the sewing part is formed on the peripheral edge side of the base fabric to form a stitched part.
[0006]
Further, in a bag formed of a plurality of base fabrics, and sewing the peripheral portions of those base fabrics to form a sewing portion,
A notch is formed in a part of the peripheral edge of one of the base fabrics that are sewn together, and only the peripheral edge of the other base fabric is sewn at the site where the notch is formed,
The notch is used as an exhaust hole.
[0007]
[Action]
A bag body formed of a plurality of base fabrics and formed with a sewing portion by sewing the peripheral portions of those base fabrics is provided with a portion that is not sewn on a portion of the peripheral portion, and this portion is used for the gas generated by the inflator. Since the exhaust hole is configured, it is not necessary to form a special exhaust hole in the bag body, and the manufacturing process of the bag body is simplified.
And if the sewing end of a sewing part is turned to the peripheral side of a base fabric and a sewing part is formed, an exhaust hole will not fray.
[0008]
Moreover, when a notch part is formed in a part of the peripheral part of a base fabric, an exhaust hole will be comprised without a notch part being sewn by overlapping a base cloth and sewing a peripheral part.
[0009]
【Example】
Embodiments will be described with reference to the drawings.
FIG. 1 is a view showing a vehicle compartment in a state where the bag body is inflated and deployed, FIG. 2 is a front view of the base fabric in a sewing state (before the bag body is reversed), and FIG. 3 is a perspective view when the bag body is attached (after the reverse). FIG. 4, FIG. 4 is a front view of the sewing state (before inversion) of the base fabric of the second embodiment, FIG. 5 is a diagram showing two base fabrics of the bag body of the third embodiment, and FIG. 6 is the third embodiment. FIG. 7 is a perspective view of an embodiment in which the present invention is applied to a bag body for a passenger seat, and FIG. 8a is a bag body for a driver seat according to the present invention. FIG. 8B is a bottom view of FIG. 8A.
[0010]
The present invention relates to a bag body structure of an airbag device, and may be applied to a side collision bag body or a bag body for a driver seat or a passenger seat.
FIG. 1 shows a side collision, 11 is a door that forms the side of the vehicle body, and 12 is an armrest that projects from the compartment side of the door 11.
Reference numeral 13 denotes a seat cushion that constitutes a seat portion of the seat, and reference numeral 14 denotes a seat back that constitutes a backrest portion of the seat. Reference numeral 15 denotes a headrest provided on the top of the seat back 14 so as to be movable up and down.
[0011]
Reference numeral 16 denotes a housing of an airbag device fitted in a storage space 17 formed on a side surface portion of the seat back 14 on the door 11 side. An opening is provided in the side portion of the housing 16 on the door 11 side, and this opening is normally closed by a lid 18.
Further, the housing 16 may be configured on a side surface portion of the seat cushion 13 on the door 11 side.
[0012]
In the housing 16, an inflator (not shown) and a folded bag body 20 are accommodated.
When a side collision is detected by a side collision detection sensor (not shown), the inflator is detonated, gas is filled in the bag body 20 attached to the inflator, and the bag body 20 expands and expands. Then, the lid 18 is rotated, and the deployment direction of the bag body 20 is regulated by the lid 18, and the bag body 20 is deployed along the inner wall of the door 11, as shown in FIG.
[0013]
The bag body 20 is composed of a plurality of base fabrics, and a sewing portion is formed by sewing the peripheral portions of the base fabrics.
For example, the bag body 20 is an inflator provided at one end of the first base fabric 21 after stitching the peripheral portions of the two base fabrics of the first base fabric 21 and the second base fabric 22 having a substantially square shape. It is formed by reversing from the opening 23 for attaching to the.
These base fabrics 21 and 22 may be woven fabrics coated with rubber or synthetic resin, or simple woven fabrics.
[0014]
In the embodiment shown in FIG. 2, the bag body 20 has a first base fabric 21 and a second base fabric 22 having the same shape overlapped with each other and sews the peripheral portion thereof to form a sewing portion 24. Thus, it is formed in a bag shape and a part not sewn is provided.
And the part which is not sewn is made into the exhaust hole 25 of the gas which generate | occur | produced with the inflator. The size of the portion not to be sewn (exhaust hole 25) may be determined as desired.
Thereafter, as shown in FIG. 3, the bag body 20 is formed by inverting the base fabrics 21 and 22 from the opening 23.
[0015]
In the embodiment shown in FIG. 4, the bag body 20 has a first base fabric 21 and a second base fabric 22 having the same shape overlapped with each other and sews the peripheral portion thereof to form a sewing portion 24. Thus, it is formed in a bag shape and a part not sewn is provided.
Then, either one or both sewing ends of the sewing portion 24 are turned back at an acute angle with respect to the sewing portion 24 on the peripheral side of the base fabric to perform the backstitching, and even if a large pressure is applied to the sewing end portion. I don't fray.
Then, the bag body 20 is formed by inverting the base fabrics 21 and 22 from the opening 23.
[0016]
In the embodiment shown in FIG. 5, the shapes of the first base fabric 21 and the second base fabric 22 are slightly different.
That is, a notch 27 is formed in a part of the peripheral edge of one of the base fabrics, in the illustrated example, the second base fabric 22. As shown in FIG. 6, the bag body 20 is formed by sewing a peripheral portion of the first base fabric 21 and the second base fabric 22 that are superposed on each other to form a sewing portion 24. The cutout portion 27 forms the exhaust hole 25 without being sewn.
Then, the bag body 20 is formed by inverting the base fabrics 21 and 22 from the opening 23.
[0017]
In the present invention, the bag body 20 folded and accommodated in the housing 16 expands and expands while being regulated by the lid 18 between the occupant and the door 11 at the time of a side collision.
Then, the gas generated in the inflator flows out from the exhaust hole 25.
[0018]
In the above embodiment, the present invention is applied to the side airbag device. However, as shown in FIG. 7, the passenger airbag device or the driver seat airbag as shown in FIGS. 8a and 8b. The present invention can also be applied to a bag device.
The base fabric constituting the airbag may be configured with a desired base fabric shape and the number of sheets according to the shape of the bag body. However, in any case, the exhaust hole 25 can be directly exposed to the passenger. It is preferable to provide it at a position that does not exist.
[0019]
【The invention's effect】
The present invention is configured as described above, and a gas exhaust hole is formed by providing a portion that is not sewn on a part of the peripheral portion of the bag body, so that it is necessary to form a special exhaust hole in the bag body. The manufacturing process of the bag body is simplified. Moreover, since it is not necessary to provide a reinforcing cloth in the peripheral part of the exhaust hole, the bag body can be easily folded.
Then, by forming the sewing portion by turning the sewing end of the sewing portion back to the peripheral side of the base fabric, the strength of the sewing end portion of the sewing portion can be increased and the size of the exhaust hole can be prevented from changing. it can. When the size of the exhaust hole changes, the restraint on the human body also changes, but according to the present invention, this does not occur.
[0020]
In addition, if the notch is formed in a part of the peripheral edge of the base fabric, the notch is not sewn and forms an exhaust hole, so that the sewing strength is stabilized and the bag body is easily manufactured. be able to.
[Brief description of the drawings]
FIG. 1 is a view showing a passenger compartment when a bag body is inflated and deployed.
FIG. 2 is a front view of a base fabric in a sewing state (before the bag body is reversed).
FIG. 3 is a perspective view when the bag body is attached (after inversion).
FIG. 4 is a front view of a sewing state (before inversion) of a base fabric according to a second embodiment.
5A and 5B are diagrams showing two base fabrics of a bag body according to a third embodiment, wherein FIG. 5A is a front view of the first base fabric, and FIG. 5B is a front view of the second base fabric.
FIG. 6 is a front view of a sewing state (before inversion) of a base fabric of a bag body according to a third embodiment.
FIG. 7 is a perspective view of an embodiment in which the present invention is applied to a bag for a passenger seat.
FIG. 8a is a rear view of an embodiment in which the present invention is applied to a bag for a driver's seat.
8b is a bottom view of the embodiment of FIG. 8a.
[Explanation of symbols]
20 Bag body 21 First base fabric 22 Second base fabric 24 Sewing part 25 Exhaust hole 26 Reverse stitching part 27 Notch part

Claims (3)

複数の基布より成り、それらの基布の周縁部を縫製して縫製部を形成した袋体において、
該袋体は、乗員とドア内壁との間でドア内壁に沿いながら展開する側突用のエアバッグを構成するものであり、
インフレータに取り付けるための開口部と、該開口部と対向する上記基布の周縁部の一部に縫製しない部分を設けてインフレータで発生するガスの排気穴としたことを特徴とするエアバッグ装置の袋体構造。In the bag body which consists of a plurality of base fabrics and sews the peripheral portions of those base fabrics to form a sewing portion,
The bag body constitutes a side-impact airbag that expands along the door inner wall between the occupant and the door inner wall,
An airbag apparatus comprising: an opening for attaching to an inflator; and a non-sewing portion provided in a part of the peripheral edge of the base fabric facing the opening to provide an exhaust hole for gas generated in the inflator Bag body structure. 縫製部の縫製端を基布の周縁側に返し縫い部を形成したことを特徴とする請求項１記載のエアバッグ装置の袋体構造。  2. The bag structure of an airbag device according to claim 1, wherein a sewing portion is formed by turning a sewing end of the sewing portion on the peripheral side of the base fabric. 複数の基布より成り、それらの基布の周縁部を縫製して縫製部を形成した袋体において、
互いに縫製されるいずれか一方の基布の周縁部の一部に切欠部を形成してあり、切欠部を形成した部位において他方の基布の周縁部のみが縫製され、
前記切欠部を排気穴としたことを特徴とするエアバッグ装置の袋体構造。In the bag body which consists of a plurality of base fabrics and sews the peripheral portions of those base fabrics to form a sewing portion,
A notch is formed in a part of the peripheral edge of one of the base fabrics that are sewn together, and only the peripheral edge of the other base fabric is sewn at the site where the notch is formed,
A bag structure of an airbag device, wherein the cutout portion is an exhaust hole.
JP18638695A 1995-06-28 1995-06-28 Bag structure of airbag device Expired - Fee Related JP3642833B2 (en)

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