JP4942258B2 - Automobile side airbag - Google Patents

Automobile side airbag Download PDF

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Publication number
JP4942258B2
JP4942258B2 JP2001185345A JP2001185345A JP4942258B2 JP 4942258 B2 JP4942258 B2 JP 4942258B2 JP 2001185345 A JP2001185345 A JP 2001185345A JP 2001185345 A JP2001185345 A JP 2001185345A JP 4942258 B2 JP4942258 B2 JP 4942258B2
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Japan
Prior art keywords
sewing
adhesive
outer peripheral
airbag
expansion chamber
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JP2003002149A (en
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亜紀 横山
光宏 吉田
隆徳 谷
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Nihon Plast Co Ltd
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Nihon Plast Co Ltd
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Description

【０００１】
【発明の属する技術分野】
この発明は、自動車の側突用エアバッグ、特に基布同士の接合が容易な自動車の側突用エアバッグに関する。
【０００２】
【従来の技術】
自動車には、各種のエアバッグが装備されている。例えば、車体のルーフレール部には、カーテン状に展開するエアバッグが折りたたみ状態で収納され、自動車の側突時に、そのエアバッグを下向きに展開させて、乗員頭部を保護するようになっている（類似技術として、特開２００１−１８５４号公報参照）。
【０００３】
この種のエアバッグは、重合又は折り重ねて向かい合わせた２枚の基布同士を外周接合部で接合して袋状にした構造をしている。そして、その一部に設けられたガス導入口からインフレータのガスを内部へ導入できるようになっている。エアバッグの外周接合部は、耐圧性及び気密性を高めるために、縫製糸による縫製部と、弾性接着剤による接着部とを組み合わせた構造になっている。
【０００４】
具体的には、まず、一方の基布の外周に所定の厚さを有する弾性接着剤をライン状に塗布し、その上に他方の基布をのせて加熱・固化させることにより、外周接合部を形成する。その次に、接着部により接合されている部分の基布同士を、接着部を挟んだ状態で、ミシンにより縫製して、縫製部を形成する。ミシン針は接着部の幅方向における中央部分を通過しながら、接着部中に単数本又は複数本の縫製部を形成する。
【０００５】
【発明が解決しようとする課題】
しかしながら、このような従来の技術にあっては、外周接合部の接着部における幅方向中央部分に縫製部を形成したため、接着部の厚い部分をミシン針が通過することになり、ミシン針の縫製抵抗が増大する。そのため、高出力のミシンが必要になると共に、縫製作業も困難になる。また、ミシン針を接着部の厚い部分に通すことにより、固化後であってもミシン針が接着部の弾性接着剤によって汚れやすく、ミシン針の交換を頻繁に行う面倒さもある。
【０００６】
この発明は、このような従来の技術に着目してなされたものであり、縫製作業が容易で、ミシン針が汚れにくい自動車の側突用エアバッグを提供するものである。
【０００７】
【課題を解決するための手段】
請求項１記載の発明は、重合又は折り重ねて向かい合わせた２枚の基布同士の外周接合部を、該外周接合部の対応する位置に塗布し、前記２枚の基布に圧着してＪＩＳ−Ａ硬さ２０以下、且つ厚さ０．１〜１．０ｍｍで固化させた弾性接着剤からなる接着部により接合することで膨張室を形成し、該接合の後に、縫製糸による縫製部により袋状に形成した自動車の側突用エアバッグであって、前記外周接合部の縫製部を、前記接着部の外周端部又は外側近接位置に設け、前記接着部の外周端は、縫製する際に薄く潰され、縫製後も該薄く潰れた状態を維持する。
【０００８】
請求項１記載の発明によれば、重合又は折り重ねて向かい合わせた２枚の基布同士の外周接合部を、該外周接合部の対応する位置に塗布し、前記２枚の基布に圧着してＪＩＳ−Ａ硬さ２０以下、且つ厚さ０．１〜１．０ｍｍで固化させた弾性接着剤からなる接着部により接合することで膨張室を形成し、該接合の後に、縫製糸による縫製部により袋状に形成した自動車の側突用エアバッグであって、前記外周接合部の縫製部を、前記接着部の外周端部又は外側近接位置に設け、前記接着部の外周端は、縫製する際に薄く潰され、縫製後も該薄く潰れた状態を維持するため、接着部を用いて縫製する際の縫製作業が容易になると共に、ミシン針に前記接着剤が付着しにくくなり、結果として、ミシン針が汚れにくくなる。縫製する位置が接着部の外側端部でなくても、外側近接位置であれば、０．１〜１．０ｍｍの厚めに塗布された弾性接着剤からなる接着部に加えた圧力により、外側端部の弾性接着剤を潰すことで縫製位置まで薄くはみ出させることができるため、そのはみ出した部分を挟んで縫製することができる。縫製部を少しでも接着部中に通すことにより、縫製糸部分の気密性を弾性接着剤により確保することができ、気密性を保つために別なシーラントを用いる必要がない。
【０００９】
請求項２記載の発明は、外周接合部の内側に、縫製糸による縫製部と弾性接着剤による接着部から成る内側接合部を設けて、該内側接合部の周囲に膨張室を形成すると共に、該内側接合部の縫製部を、接着部の反膨張室側端部又は反膨張室側近接位置に設けた。
【００１０】
請求項２記載の発明によれば、外周接合部の内側に、別な内側接合部が設けられた構造のエアバッグであっても、内側接合部における縫製部が接着部の反膨張室側端部又は反膨張室側近接位置に設けられているため、外周接合部の場合と同様に、接着部の反膨張室側端部が潰れて薄くなり、縫製作業が容易になると共に、ミシン針が汚れにくくなる。
【００１３】
【発明の実施の形態】
以下、この発明の一実施形態を図１〜図４に基づいて説明する。エアバッグ１は、図示せぬ車体上部のルーフレールインナに折りたたみ状態で収納されて、自動車の側突時に、下側に向けてカーテン状に展開する構造のものである。この種のエアバッグ１は、他のタイプに比べて、膨張を維持する時間が長く、特に高い耐圧性と気密性が要求される。
【００１４】
このエアバッグ１は、前席乗員を保護する前席膨張部２と、後席乗員を保護する後席膨張部３とを、上下寸法の小さい連通部４で連結した形状をしており、最後部にはガス導入口５が形成されている。
【００１５】
このエアバッグ１は、同じ形状に裁断した２枚の基布６を重合させ（一枚物を対称形状に裁断して折り重ねても可）、その外周にガス導入口５を残した状態で外周接合部７を形成し、全体を袋形状にしている。また、前席膨張部２と後席膨張部３の中央には、それぞれ円形の内側接合部８も形成されている。この内側接合部８の周囲には膨張室９（図２参照）が形成され、この内側接合部８を設けたことにより、前席膨張部２及び後席膨張部３のそれぞれの膨張厚さを抑制することができる。
【００１６】
外周接合部７は、シリコン系の弾性接着剤による接着部７ａと、１２６０デニールの縫製糸による２本の第１縫製部７ｂ及び第２縫製部７ｃとから形成されている。第１縫製部７ｂ及び第２縫製部７ｃは、接着部７ａに対して外側へオフセットしており、第１縫製部７ｂは接着部７ａの外側端部１０に対応しており、第２縫製部７ｃは接着部７ａから外側へ若干離れている。
【００１７】
内側接合部８も、外周接合部７と同様の接着部８ａと、第１縫製部８ｂ及び第２縫製部８ｃとから形成されている。第１縫製部８ｂ及び第２縫製部８ｃは、接着部８ａに対して内側接合部８の中心側（反膨張室９側）へオフセットしており、第１縫製部８ｂは接着部８ａの反膨張室側端部１１（図４）に対応しており、第２縫製部８ｃは接着部８ａから反膨張室側へ若干離れている。従って、第１縫製部７ｂ、８ｂが、本発明に係る「縫製部」である。
【００１８】
次に、エアバッグ１の製造方法を説明する。まず、一方の基布６の外周接合部７及び内側接合部８に対応する位置に、それぞれ弾性接着剤を厚めに塗布する。その上に他方の基布６を重合させて、所定の間隔（０．８ｍｍ）を設けた２本のローラ間に通し、基布６と弾性接着剤とを圧着する。その後、１００°Ｃの雰囲気で５時間加熱し、弾性接着剤を固化させ、約０．８ｍｍの厚さの接着部７ａ、８ａを形成する。尚、接着部７ａ、８ａの厚さとしては、０．１〜１．０ｍｍが好適で、より好ましくは、０．５〜０．８ｍｍが良い。また、固化後、ＪＩＳ−Ａ硬さ２０以下がよい。
【００１９】
そして、外周接合部７における接着部７ａの外側端部１０に対応する位置に、ミシン針により、第１縫製部７ｂを形成し、その外側に第２縫製部７ｃを形成する。次に、内側接合部８における接着部８ａの反膨張室側端部１１に対応する位置に、ミシン針により、第１縫製部８ｂを形成し、その反膨張室側位置に第２縫製部８ｃを形成する。
【００２０】
この内側接合部８における縫製作業の詳細を、図４に基づいて説明する。縫製する前の接着部８ａは、固化した状態の厚さを有している〔図４（ａ）〕。そして、ミシン針により、接着部８ａの反膨張室側端部１１に対して第１縫製部８ｂを形成し始めると、その反膨張室側端部１１が縫製する際の圧力により潰されて薄くなるため、ミシン針は潰されて薄くなった反膨張室側端部１１と２枚の基布６を容易に通過する〔図４（ｂ）〕。従って、縫製作業が容易であると共に、ミシン針も接着部８ａにより汚されにくい。
【００２１】
つまり、従来は接着部８ａの中央の厚い部分を縫製しており、接着部８ａが容易に潰れず、ミシン針を厚いままの接着部８ａに通していたため、縫製作業が困難であるし、ミシン針も接着部８ａにより汚れ易かったが（弾性接着剤のため、固化しても付着しやすい）、本実施形態では、そのようなことはない。更に、薄いとはいえ、第１縫製部８ｂが接着部８ａの反膨張室側端部１１を通過しているため、第１縫製部８ｂの縫製糸部分の気密性は保たれる。そして、最後に、第１縫製部８ｂの隣りに第２縫製部８ｃを形成すれば、エアバッグ１の製造が完了する〔図４（ｃ）〕。以上のような、内側接合部８の構造及び機能は、外周接合部７でも同様である。
【００２２】
この実施形態によれば、接着部７ａ、８ａが厚くても、その端部１０、１１を薄く潰して縫製することができるため、接着部７ａ、８ａの厚さを従来よりも増して、外周接合部７及び内側接合部８の接合強度を向上させることができる。
【００２３】
尚、以上の実施形態では、接着部７ａ、８ａの外側端部１０及び反膨張室側端部１１に対応する部分に第１縫製部７ｂ、８ｂを形成したが、７ｂ、８ｂを形成する位置は、外側端部１０及び反膨張室側端部１１でなくても、外側端部１０及び反膨張室側端部１１の外側近接位置であれ良い。すなわち、近接位置であれば、縫製する際の圧力により、外側端部１０及び反膨張室側端部１１を潰して縫製位置まで薄くはみ出させることができるため、そのはみ出した部分を挟んで縫製することができる。
【００２４】
また、この実施形態では、側突用のカーテン状エアバッグ１を例にしたが、本発明はその他のエアバッグにも適用できる。更に、内側接合部８の形状も円形に限定されない。
【００２５】
【発明の効果】
この発明によれば、重合又は折り重ねて向かい合わせた２枚の基布同士の外周接合部を、該外周接合部の対応する位置に塗布し、前記２枚の基布に圧着してＪＩＳ−Ａ硬さ２０以下、且つ厚さ０．１〜１．０ｍｍで固化させた弾性接着剤からなる接着部により接合することで膨張室を形成し、該接合の後に、縫製糸による縫製部により袋状に形成した自動車の側突用エアバッグであって、前記外周接合部の縫製部を、前記接着部の外周端部又は外側近接位置に設け、前記接着部の外周端は、縫製する際に薄く潰され、縫製後も該薄く潰れた状態を維持するため、接着部を用いて縫製する際の縫製作業が容易になると共に、ミシン針に前記接着剤が付着しにくくなり、結果として、ミシン針が汚れにくくなる。縫製する位置が接着部の外側端部でなくても、外側近接位置であれば、０．１〜１．０ｍｍの厚めに塗布された弾性接着剤からなる接着部に加えた圧力により、外側端部の弾性接着剤を潰すことで縫製位置まで薄くはみ出させることができるため、そのはみ出した部分を挟んで縫製することができる。縫製部を少しでも接着部中に通すことにより、縫製糸部分の気密性を弾性接着剤により確保することができ、気密性を保つために別なシーラントを用いる必要がない。
【図面の簡単な説明】
【図１】この発明の一実施形態に係るエアバッグを示す側面図。
【図２】図１中矢示ＳＡ−ＳＡ線に沿う膨張状態のエアバッグを示す断面図。
【図３】膨張前のエアバッグを示す断面図。
【図４】図３中矢示ＤＡ部分を示す拡大断面図で、縫製前（ａ）、縫製途中（ｂ）、縫製後（ｃ）の状態をそれぞれ示す図。
【符号の説明】
１ エアバッグ
６ 基布
７ 外周接合部
７ａ 接着部
７ｂ 第１縫製部（縫製部）
７ｃ 第２縫製部
８ 内側接合部
８ａ 接着部
８ｂ 第１縫製部（縫製部）
８ｃ 第２縫製部
９ 膨張室
１０ 外側端部
１１ 反膨張室側端部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile side impact airbag, and more particularly to an automobile side impact airbag in which base fabrics can be easily joined together.
[0002]
[Prior art]
The automobile is equipped with various airbags. For example, an airbag that is deployed in a curtain shape is stored in a folded state on the roof rail portion of the vehicle body, and when the vehicle collides, the airbag is deployed downward to protect the passenger's head. (For similar technology, refer to Japanese Patent Laid-Open No. 2001-1854).
[0003]
This type of airbag has a bag-like structure in which two base fabrics that are superposed or folded to face each other are joined together at an outer peripheral joint. And the gas of an inflator can be introduce | transduced into the inside from the gas inlet provided in the part. The outer peripheral joint portion of the airbag has a structure in which a sewing portion using a sewing thread and an adhesive portion using an elastic adhesive are combined in order to improve pressure resistance and airtightness.
[0004]
Specifically, first, an elastic adhesive having a predetermined thickness is applied in a line shape to the outer periphery of one base fabric, and the other base fabric is placed on the outer fabric and heated and solidified, whereby the outer peripheral joint portion Form. Next, the base fabrics of the parts joined by the adhesive part are sewn with a sewing machine in a state where the adhesive part is sandwiched, thereby forming a sewing part. The sewing needle forms one or a plurality of sewing portions in the bonded portion while passing through the central portion in the width direction of the bonded portion.
[0005]
[Problems to be solved by the invention]
However, in such a conventional technique, since the sewing portion is formed in the center portion in the width direction of the bonded portion of the outer peripheral joint portion, the sewing needle passes through the thick portion of the bonded portion, and the sewing needle is sewn. Resistance increases. For this reason, a high output sewing machine is required, and sewing work becomes difficult. Further, by passing the sewing needle through the thick part of the bonding portion, the sewing needle is easily soiled by the elastic adhesive of the bonding portion even after solidification, and there is also the trouble of frequently replacing the sewing needle.
[0006]
The present invention has been made by paying attention to such a conventional technique, and provides a side impact airbag for an automobile that can be easily sewn and the sewing needles are hardly soiled.
[0007]
[Means for Solving the Problems]
In the invention according to claim 1, the outer peripheral joint portion between the two base fabrics that are overlapped or overlapped with each other is applied to the corresponding position of the outer peripheral joint portion, and is crimped to the two base fabrics. An expansion chamber is formed by joining with an adhesive part made of an elastic adhesive solidified with a JIS-A hardness of 20 or less and a thickness of 0.1 to 1.0 mm, and after the joining, a sewing part with a sewing thread The airbag for a side impact of an automobile formed in a bag shape by providing a sewing portion of the outer peripheral joint portion at an outer peripheral end portion or an outer proximity position of the adhesive portion, and the outer peripheral end of the adhesive portion is sewn. It is crushed thinly and maintains the thinly crushed state after sewing .
[0008]
According to the first aspect of the present invention, the outer peripheral joint portion between the two base fabrics that are overlapped with each other by being superposed or folded is applied to the corresponding position of the outer peripheral joint portion, and is crimped to the two base fabrics. Then , an expansion chamber is formed by bonding with an adhesive portion made of an elastic adhesive solidified with a JIS-A hardness of 20 or less and a thickness of 0.1 to 1.0 mm. After the bonding, a sewing thread is used. An airbag for a side collision of an automobile formed in a bag shape by a sewing portion, wherein a sewing portion of the outer peripheral joint portion is provided at an outer peripheral end portion or an outer proximity position of the adhesive portion, and an outer peripheral end of the adhesive portion is Since it is thinly crushed when sewing and maintains the thinly crushed state even after sewing, the sewing work becomes easy when sewing using the adhesive portion, and the adhesive is less likely to adhere to the sewing needle, As a result, the sewing needle becomes difficult to get dirty. Even if the position to be sewn is not the outer end portion of the adhesive portion, if it is the outer proximity position, the outer end is caused by the pressure applied to the adhesive portion made of a thick adhesive of 0.1 to 1.0 mm. since part of the elastic adhesive can protrude thinned to the sewing position in the ulcer Succoth, it can be sewn across the protruding portion. By passing the sewing portion through the adhesive portion as much as possible, the airtightness of the sewing thread portion can be ensured by the elastic adhesive, and there is no need to use another sealant in order to maintain the airtightness.
[0009]
The invention according to claim 2 is provided with an inner joint portion formed of a sewing portion by a sewing thread and an adhesive portion by an elastic adhesive inside the outer peripheral joint portion, and an expansion chamber is formed around the inner joint portion. The sewn part of the inner joint part was provided at the end part on the anti-expansion chamber side of the adhesive part or the position adjacent to the anti-expansion chamber side.
[0010]
According to the second aspect of the present invention, even if the airbag has a structure in which another inner joint portion is provided inside the outer peripheral joint portion, the sewing portion at the inner joint portion is the anti-expansion chamber side end of the adhesive portion. As is the case with the outer peripheral joint, the anti-expansion chamber side end of the adhesive portion is crushed and thinned, and the sewing operation is facilitated. It becomes difficult to get dirty.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. The airbag 1 is housed in a folded state in a roof rail inner at the upper part of a vehicle body (not shown), and is deployed in a curtain shape toward the lower side when a car collides. This type of airbag 1 requires a longer time to maintain inflation than other types, and particularly requires high pressure resistance and airtightness.
[0014]
The airbag 1 has a shape in which a front seat inflatable portion 2 that protects a front seat occupant and a rear seat inflatable portion 3 that protects a rear seat occupant are connected by a communication portion 4 having a small vertical dimension. A gas inlet 5 is formed in the part.
[0015]
The airbag 1 is obtained by polymerizing two base fabrics 6 cut into the same shape (a single piece may be cut into a symmetrical shape and folded), and the gas inlet 5 remains on the outer periphery thereof. The outer periphery joining part 7 is formed and the whole is made into a bag shape. A circular inner joint 8 is also formed at the center of each of the front seat expansion portion 2 and the rear seat expansion portion 3. An expansion chamber 9 (see FIG. 2) is formed around the inner joint portion 8. By providing the inner joint portion 8, the expansion thickness of each of the front seat expansion portion 2 and the rear seat expansion portion 3 can be set. Can be suppressed.
[0016]
The outer peripheral joint portion 7 is formed of an adhesive portion 7a made of a silicon-based elastic adhesive, and two first sewing portions 7b and second sewing portions 7c made of 1260 denier sewing threads. The first sewing portion 7b and the second sewing portion 7c are offset outward with respect to the bonding portion 7a. The first sewing portion 7b corresponds to the outer end portion 10 of the bonding portion 7a, and the second sewing portion. 7c is slightly away from the bonding portion 7a to the outside.
[0017]
The inner joint portion 8 is also formed of an adhesive portion 8a similar to the outer joint portion 7, and a first sewing portion 8b and a second sewing portion 8c. The 1st sewing part 8b and the 2nd sewing part 8c are offset to the center side (the anti-expansion chamber 9 side) of the inner side joining part 8 with respect to the adhesion part 8a, and the 1st sewing part 8b is opposite to the adhesion part 8a. It corresponds to the expansion chamber side end portion 11 (FIG. 4), and the second sewing portion 8c is slightly separated from the bonding portion 8a to the anti-expansion chamber side. Therefore, the 1st sewing parts 7b and 8b are "sewing parts" concerning the present invention.
[0018]
Next, a method for manufacturing the airbag 1 will be described. First, a thick adhesive is applied to each of the positions corresponding to the outer peripheral joint 7 and the inner joint 8 of the base fabric 6. The other base cloth 6 is polymerized thereon and passed between two rollers having a predetermined interval (0.8 mm), and the base cloth 6 and the elastic adhesive are pressure-bonded. Thereafter, heating is performed in an atmosphere of 100 ° C. for 5 hours to solidify the elastic adhesive, and adhesive portions 7a and 8a having a thickness of about 0.8 mm are formed. In addition, as thickness of the adhesion parts 7a and 8a, 0.1-1.0 mm is suitable, More preferably, 0.5-0.8 mm is good. Moreover, after solidification, JIS-A hardness 20 or less is good.
[0019]
And the 1st sewing part 7b is formed with the sewing needle in the position corresponding to the outer side edge part 10 of the adhesion part 7a in the outer periphery junction part 7, and the 2nd sewing part 7c is formed in the outer side. Next, a first sewing portion 8b is formed by a sewing needle at a position corresponding to the anti-expansion chamber side end portion 11 of the bonding portion 8a in the inner joint portion 8, and a second sewing portion 8c is formed at the anti-expansion chamber side position. Form.
[0020]
Details of the sewing work at the inner joint 8 will be described with reference to FIG. The adhesive portion 8a before sewing has a solidified thickness [FIG. 4 (a)]. When the sewing needle starts to form the first sewing portion 8b on the anti-expansion chamber side end portion 11 of the bonding portion 8a, the anti-expansion chamber side end portion 11 is crushed and thinned by the pressure at the time of sewing. Therefore, the sewing needle easily passes through the anti-expansion chamber side end portion 11 and the two base fabrics 6 that are crushed and thinned (FIG. 4B). Therefore, the sewing operation is easy and the sewing needle is not easily soiled by the bonding portion 8a.
[0021]
In other words, conventionally, the thick portion at the center of the bonding portion 8a is sewn, and the bonding portion 8a is not easily crushed, and the sewing needle is passed through the thick bonding portion 8a. Although the needle was also easily soiled by the adhesive portion 8a (because it is an elastic adhesive, it easily adheres even when solidified), but this is not the case in this embodiment. Furthermore, although it is thin, since the 1st sewing part 8b has passed the anti-expansion chamber side edge part 11 of the adhesion part 8a, the airtightness of the sewing thread part of the 1st sewing part 8b is maintained. And finally, if the 2nd sewing part 8c is formed adjacent to the 1st sewing part 8b, manufacture of the airbag 1 will be completed [FIG.4 (c)]. The structure and function of the inner joint 8 as described above are the same in the outer joint 7.
[0022]
According to this embodiment, even if the adhesive portions 7a and 8a are thick, the end portions 10 and 11 can be squeezed thinly and sewn. Therefore, the thickness of the adhesive portions 7a and 8a is increased as compared with the prior art. The joint strength of the joint part 7 and the inner joint part 8 can be improved.
[0023]
In the above embodiment, the first sewing portions 7b and 8b are formed in the portions corresponding to the outer end portion 10 and the anti-expansion chamber side end portion 11 of the bonding portions 7a and 8a, but the positions where the 7b and 8b are formed. The outer end portion 10 and the non-expansion chamber side end portion 11 may be located outside the outer end portion 10 and the anti-expansion chamber side end portion 11. That is, at the close position, the outer end portion 10 and the anti-expansion chamber side end portion 11 can be crushed and thinly protruded to the sewing position by the pressure at the time of sewing, so that the protruding portion is sewn. be able to.
[0024]
In this embodiment, the side-impact curtain airbag 1 is taken as an example, but the present invention can also be applied to other airbags. Furthermore, the shape of the inner joint portion 8 is not limited to a circle.
[0025]
【Effect of the invention】
According to this invention, the outer peripheral joint portion between two base fabrics that are overlapped or overlapped with each other is applied to a corresponding position of the outer peripheral joint portion, and is crimped to the two base fabrics to be JIS- A An expansion chamber is formed by joining with an adhesive part made of an elastic adhesive solidified with a hardness of 20 or less and a thickness of 0.1 to 1.0 mm. After the joining, a bag is formed by a sewing part with a sewing thread. A side impact airbag of the automobile formed in a shape, wherein a sewing portion of the outer peripheral joint portion is provided at an outer peripheral end portion or an outer proximity position of the adhesive portion, and the outer peripheral end of the adhesive portion is sewn. Since it is thinly crushed and maintains the thinly crushed state even after sewing, it is easy to perform sewing work when sewing using the adhesive portion, and it is difficult for the adhesive to adhere to the sewing needle. The needle is less likely to get dirty. Even if the position to be sewn is not the outer end portion of the adhesive portion, if it is the outer proximity position, the outer end is caused by the pressure applied to the adhesive portion made of a thick adhesive of 0.1 to 1.0 mm. since part of the elastic adhesive can protrude thinned to the sewing position in the ulcer Succoth, it can be sewn across the protruding portion. By passing the sewing portion through the adhesive portion as much as possible, the airtightness of the sewing thread portion can be ensured by the elastic adhesive, and there is no need to use another sealant in order to maintain the airtightness.
[Brief description of the drawings]
FIG. 1 is a side view showing an airbag according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the airbag in an inflated state along the line SA-SA indicated by an arrow in FIG.
FIG. 3 is a cross-sectional view showing an airbag before inflation.
4 is an enlarged cross-sectional view showing a DA portion indicated by an arrow in FIG. 3, and shows a state before sewing (a), during sewing (b), and after sewing (c).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air bag 6 Base cloth 7 Peripheral junction part 7a Adhesion part 7b 1st sewing part (sewing part)
7c Second sewing portion 8 Inner joint portion 8a Adhesive portion 8b First sewing portion (sewing portion)
8c 2nd sewing part 9 Expansion chamber 10 Outer edge part 11 Anti-expansion chamber side edge part

Claims (2)

重合又は折り重ねて向かい合わせた２枚の基布同士の外周接合部を、該外周接合部の対応する位置に塗布し、前記２枚の基布に圧着してＪＩＳ−Ａ硬さ２０以下、且つ厚さ０．１〜１．０ｍｍで固化させた弾性接着剤からなる接着部により接合することで膨張室を形成し、該接合の後に、縫製糸による縫製部により袋状に形成した自動車の側突用エアバッグであって、
前記外周接合部の縫製部を、前記接着部の外周端部又は外側近接位置に設け、前記接着部の外周端は、縫製する際に薄く潰され、縫製後も該薄く潰れた状態を維持することを特徴とする自動車の側突用エアバッグ。The outer peripheral joint portion between two base fabrics that are superposed or folded and faced each other is applied to the corresponding position of the outer peripheral joint portion, and is crimped to the two base fabrics to have a JIS-A hardness of 20 or less, In addition , an expansion chamber is formed by joining with an adhesive portion made of an elastic adhesive solidified with a thickness of 0.1 to 1.0 mm, and after the joining, an automobile formed in a bag shape by a sewing portion with a sewing thread A side-impact airbag,
A sewing portion of the outer peripheral joint portion is provided at an outer peripheral end portion or an outer proximity position of the adhesive portion, and the outer peripheral end of the adhesive portion is thinly crushed when sewing and maintains the thinly crushed state even after sewing. An airbag for a side impact of an automobile. 請求項１記載の自動車の側突用エアバッグであって、
外周接合部の内側に、縫製糸による縫製部と弾性接着剤による接着部から成る内側接合部を設けて、該内側接合部の周囲に膨張室を形成すると共に、該内側接合部の縫製部を、接着部の反膨張室側端部又は反膨張室側近接位置に設けたことを特徴とする自動車の側突用エアバッグ。An airbag for a side collision of an automobile according to claim 1,
Provided on the inner side of the outer peripheral joint is an inner joint consisting of a sewing part made of sewing thread and an adhesive part made of elastic adhesive, forming an expansion chamber around the inner joint, and the sewing part of the inner joint A side impact airbag for an automobile, characterized in that the airbag is provided at an anti-expansion chamber side end of an adhesive portion or an anti-expansion chamber side proximity position.
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JPH0310946A (en) * 1989-06-08 1991-01-18 Asahi Chem Ind Co Ltd Air bag
JPH0376855A (en) * 1989-08-15 1991-04-02 Ichikawa Woolen Textile Co Ltd Tubular felt for polishing
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