JPH11189116A - Air bag - Google Patents
Air bagInfo
- Publication number
- JPH11189116A JPH11189116A JP9360639A JP36063997A JPH11189116A JP H11189116 A JPH11189116 A JP H11189116A JP 9360639 A JP9360639 A JP 9360639A JP 36063997 A JP36063997 A JP 36063997A JP H11189116 A JPH11189116 A JP H11189116A
- Authority
- JP
- Japan
- Prior art keywords
- sewing
- sewn
- thread
- airbag
- melting point
- 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.)
- Pending
Links
Landscapes
- Air Bags (AREA)
- Woven Fabrics (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、自動車の衝突時、
乗員を保護するためのエアバッグに係わり、展開時の突
出により発生する衝撃力に耐え、かつインフレーターか
らの熱ガスに対する耐熱性に優れるエアバッグに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag for protecting an occupant, which withstands an impact force generated by a projection at the time of deployment and has excellent heat resistance to hot gas from an inflator.
【0002】[0002]
【従来の技術】近年、乗員保護用安全装置としてエアバ
ッグシステムが普及してきており、運転席用、助手席
用、側突防護用(サイドバッグ)、後部座席用など装着
部位も増えてきている。2. Description of the Related Art In recent years, airbag systems have become widespread as occupant protection safety devices, and mounting parts for driver's seats, passenger seats, side collision protection (side bags), rear seats, and the like have been increasing. .
【0003】しかるに搭載されるエアバッグの部位、数
量が増えるにつれシステムの軽量化、コンパクト化が要
求されはじめ、システムの各部品は小型化、軽量化を目
指した設計が行われてきている。その中で、エアバッグ
を膨脹させるための熱ガス発生装置であるインフレータ
ーも小型化、軽量化されてきているが、ガス発生剤の組
成も影響して発生ガスの温度が高くなる場合があった。However, as the number and the number of airbags mounted increase, the weight and size of the system must be reduced, and the components of the system have been designed to be smaller and lighter. Among them, inflators, which are hot gas generators for inflating airbags, have also been reduced in size and weight, but the temperature of the generated gas sometimes increased due to the composition of the gas generating agent. .
【0004】このようなインフレーターに対応するた
め、エアバッグ本体や部材に耐熱性材料を使用したり、
部分的に耐熱性の被覆材を用いたりすることがあった。
また、インフレーター取付口周辺や吊り紐の接合部な
ど、熱ガスの影響を受け易い部位に耐熱性縫糸を使用す
る方法も採られてきた。In order to cope with such an inflator, a heat-resistant material is used for an airbag body and members,
In some cases, a heat-resistant covering material was used.
In addition, a method of using a heat-resistant sewing thread in a portion that is easily affected by hot gas, such as around an inflator attachment port or a joining portion of a hanging string, has been adopted.
【0005】例えば、特開平8−225048号公報に
は、インフレーター取付用開口部の周囲に補強布を重合
して、アラミド繊維からなる縫製糸により縫製する方
法、特開平6−8778号公報には、インフレーター取
付孔の周縁で、インフレーターを取付け固定するための
金具(リテーナ)の外側に位置する補強布縫付部を炭素
繊維で縫付ける方法、あるいは特開平4−325343
号公報には、エアバッグの各縫合部分のうち、高温にさ
らされる部分の縫合に耐熱不溶性の金属糸を用いる方
法、などが提案されている。For example, JP-A-8-225048 discloses a method in which a reinforcing cloth is superimposed around an opening for mounting an inflator and sewn with a sewing thread made of aramid fiber. A method of sewing a reinforcing cloth sewn portion located outside a metal fitting (retainer) for mounting and fixing the inflator around the periphery of the inflator mounting hole with carbon fiber, or Japanese Patent Laid-Open No. 4-325343.
Japanese Patent Laid-Open Publication No. H11-15083 proposes a method in which a heat-insoluble metal thread is used for suturing a portion exposed to a high temperature in each sewn portion of an airbag.
【0006】[0006]
【発明が解決しようとする課題】これらの耐熱性縫糸
は、その優れた耐熱特性によりインフレーターに近接し
た部位に使用されて高温ガスに曝露されても溶融するこ
となく堅固に縫合形態を保持する。しかし、これらの耐
熱性縫糸を用いた場合でも、縫製部位によっては縫糸も
しくはエアバッグ基布が破断、損傷する場合が、特にエ
アバッグ装置全体としての小型化に伴って使用される構
成部品の組合せによって見られるようになった。本発明
者らはこうした問題を検討して、この原因が上記先行技
術に提案されている耐熱性材料から成る縫製糸の破断伸
度は5%以下であり、そのため展開時に起こる急激な突
出により発生するエアバッグ基布の部分的でしかも不均
一な伸長挙動に追随することが難しいことにあることを
究明した。These heat-resistant sutures are used in a portion close to an inflator due to their excellent heat-resistant properties, so that they remain firmly stitched without being melted even when exposed to a high-temperature gas. However, even when these heat-resistant sewing threads are used, the sewing threads or the airbag base cloth may break or be damaged depending on the sewing site. In particular, the combination of the components used in the downsizing of the airbag apparatus as a whole is considered. Became seen by. The present inventors have studied such a problem, and the cause of this problem is that the breaking elongation of a sewing thread made of a heat-resistant material proposed in the above prior art is 5% or less, and therefore, it is caused by a sudden protrusion occurring at the time of deployment. It has been found that it is difficult to follow the partial and non-uniform elongation behavior of the airbag fabric.
【0007】本発明は、こうした実情の下に、インフレ
ーターからの熱ガスの影響を受けず、しかも展開時の急
激な伸長挙動にも耐え得る縫合部により構成された、優
れた性能をもつエアバッグを提供するものである。[0007] Under such circumstances, the present invention provides an airbag having excellent performance which is constituted by a sewn portion which is not affected by hot gas from an inflator and which can withstand a rapid elongation behavior during deployment. Is provided.
【0008】[0008]
【課題を解決するための手段】本発明者は、耐熱性に優
れ、展開時の急激な突出にも耐え得るエアバッグに関
し、鋭意工夫を行った結果、縫合部の少なくとも一部を
特定の性質を持つ縫糸を用いることにより、発明の目的
に到達することができた。Means for Solving the Problems The present inventor has made intensive efforts on an airbag which is excellent in heat resistance and can withstand sudden protrusion during deployment. The object of the invention can be attained by using a sewing thread having.
【0009】すなわち、本発明は、 (1)複数の部材が縫合されて構成されてなるエアバッ
グにおいて、該縫合部の少なくとも一部が、エアバッグ
本体を構成する繊維材料の融点または分解点より高い融
点または分解点をもつ耐熱性繊維糸条からなり、破断伸
度が15%以上である縫糸を用いて縫製され、かつ、前
記耐熱性繊維糸条からなる縫糸により縫製されている縫
合部が下記に示す(1)式を満足する縫糸番手Tで縫製
されていることを特徴とするエアバッグ、 (1)10≦T≦50 (2)複数の部材が縫合されて構成されてなるエアバッ
グにおいて、該縫合部の少なくとも一部が、エアバッグ
本体を構成する繊維材料の融点または分解点より高い融
点または分解点をもつ耐熱性繊維糸条からなり、破断伸
度が15%以上である縫糸を用いて縫製され、かつ前記
耐熱性繊維糸条からなる縫糸により縫製されている縫合
部が下記に示す(2)式を満足する運針数S(針/c
m)で縫製されていることを特徴とするエアバッグ、 (2)2≦T/S≦8 (3)複数の部材が縫合されて構成されてなるエアバッ
グにおいて、該縫合部の少なくとも一部が、エアバッグ
本体を構成する繊維材料の融点または分解点より高い融
点または分解点をもつ耐熱性繊維糸条からなり、破断伸
度が15%以上である縫糸を用いて縫製され、かつ前記
耐熱性繊維糸条からなる縫糸により縫製されている縫合
部が下記に示する(1)式および(2)式を満足する縫
合番手Tならびに運針数S(針/cm)で縫製されてい
ることを特徴とするエアバッグ、 (1)10≦T≦50 (2)2≦T/S≦8 である。That is, the present invention provides: (1) In an airbag formed by suturing a plurality of members, at least a part of the sewn portion is determined by a melting point or a decomposition point of a fiber material constituting the airbag body. A sewn portion made of a heat-resistant fiber yarn having a high melting point or a decomposition point, sewn using a sewing thread having a breaking elongation of 15% or more, and sewn with a sewing thread made of the heat-resistant fiber yarn is provided. An airbag sewn with a thread count T satisfying the following expression (1): (1) 10 ≦ T ≦ 50 (2) an airbag formed by sewing a plurality of members , At least a part of the sewn portion comprises a heat-resistant fiber yarn having a melting point or a decomposition point higher than a melting point or a decomposition point of a fiber material constituting an airbag body, and a breaking elongation of 15% or more. Sewn with and pointer movement speed S (needles / c suture portion being sewn by sewing thread made of the heat-resistant fiber yarn satisfies the below expression (2)
(2) 2 ≦ T / S ≦ 8 (3) In an airbag formed by sewing a plurality of members, at least a part of the sewn portion Is made of a heat-resistant fiber yarn having a melting point or a decomposition point higher than the melting point or the decomposition point of the fiber material constituting the airbag body, and is sewn using a sewing thread having a breaking elongation of 15% or more, and That the sewn portion sewn with the suture made of the synthetic fiber thread is sewn with the suture count T and the number of needles S (needle / cm) satisfying the following expressions (1) and (2). (1) 10 ≦ T ≦ 50 (2) 2 ≦ T / S ≦ 8
【0010】本発明に用いる耐熱性繊維糸条から成る縫
糸は、インフレーターの熱ガスの影響を受け易く、エア
バッグの展張時に急激な伸長挙動を生じ易い部位、例え
ばインフレーター取付口周辺、吊り紐の縫合固定部、排
気孔周囲、防炎布やガス流路調整布などの縫合固定部な
どに使用されるため、エアバッグ本体を構成する繊維材
料の融点または分解点より高い融点または分解点をもつ
必要がある。また、急激なエアバッグ基布の伸長挙動に
追随するために、縫糸の破断伸度は15%以上が必須で
ある。好ましくは18%以上である。The sewing thread made of the heat-resistant fiber thread used in the present invention is easily affected by the hot gas of the inflator, and tends to undergo a rapid elongation behavior when the airbag is expanded, for example, around the inflator mounting opening, around the suspension string. Since it is used for suturing fixing parts, around the exhaust holes, suturing fixing parts such as flameproof cloth and gas flow adjusting cloth, etc., it has a melting point or decomposition point higher than the melting point or decomposition point of the fiber material constituting the airbag body. There is a need. In addition, in order to follow the rapid elongation behavior of the airbag base fabric, the breaking elongation of the sewing thread must be 15% or more. It is preferably at least 18%.
【0011】縫糸の引張強度は要望される縫合部強力に
応じて適宜選定すればよく、通常、4g/d以上、好ま
しくは4.5g/d以上あればよいが、縫糸の番手(太
さ)によっても求める縫糸強力の範囲を特定することが
できる。The tensile strength of the suture may be appropriately selected according to the required strength of the sewn portion, and is usually 4 g / d or more, preferably 4.5 g / d or more. The range of the required sewing thread strength can also be specified.
【0012】通常、エアバッグの基布として用いられて
いるナイロン66やポリエステルの融点は、250〜2
60℃であるから本発明で用いる耐熱性繊維糸条の融点
または分解点は265℃以上、好ましくは270℃以上
であることが必要となる。Usually, the melting point of nylon 66 or polyester used as a base fabric of an airbag is 250 to 2
Since the temperature is 60 ° C., the melting point or decomposition point of the heat-resistant fiber yarn used in the present invention needs to be 265 ° C. or more, preferably 270 ° C. or more.
【0013】本発明で使用される耐熱性と適性伸度を有
する縫糸を構成する耐熱性繊維糸条としては、ポリフェ
ニレンサルファイド(PPS)繊維、ポリエーテルエー
テルケトン(PEEK)繊維、ポリテトラフルオロエチ
レン(PTFE)繊維、ポリエチレンナフタレート(P
EN)繊維、メタ系アラミド(例えば、ノメックス、コ
ーネックス)繊維、ナイロン46繊維、などの一種又は
二種以上のフィラメント、紡績糸、混紡糸、混繊糸、交
撚糸、捲回糸などを用いればよいが、これらに限定され
るものではない。The heat-resistant fiber yarns constituting the sewing thread having heat resistance and suitable elongation used in the present invention include polyphenylene sulfide (PPS) fiber, polyether ether ketone (PEEK) fiber, polytetrafluoroethylene ( PTFE) fiber, polyethylene naphthalate (P
EN) fibers, one or more filaments such as meta-aramid (eg, Nomex, Conex) fibers, nylon 46 fibers, and the like, spun yarns, blended yarns, blended yarns, twisted yarns, wound yarns, and the like. However, the present invention is not limited to these.
【0014】更に、本発明の好ましい態様においては、
これらの耐熱繊維糸条から成る縫糸の縫糸番手Tを10
≦T≦50、さらに好ましくは10≦T≦40の範囲に
することが必要である。10番手より小さい番手、すな
わち、太い縫糸では、エアバッグ基布に大きな縫い目穴
を形成することになり、展張時の急激な伸長により縫い
目が拡大し、破損するおそれがあり、50番手より大き
い番手、即ち細い縫糸では、縫合部の補強効果が小さ
い。細い縫糸で運針数を多く縫製することは、低目付基
布、例えば200デニール以下の原糸を使った、目付1
50g/m2以下の薄手基布に対しては特に有効であ
る。Further, in a preferred embodiment of the present invention,
The thread count T of the thread composed of these heat-resistant fiber threads is 10
≦ T ≦ 50, more preferably 10 ≦ T ≦ 40. With a count smaller than 10th, that is, with a thick sewing thread, a large stitch hole is formed in the airbag base fabric, and the stitches may be enlarged and damaged due to rapid expansion during expansion, and a count larger than 50th. In other words, with a thin suture, the effect of reinforcing the sewn portion is small. To sew a large number of needles with a thin sewing thread, it is necessary to use a low basis weight fabric, for example, a basis weight using a raw yarn of 200 denier or less.
It is particularly effective for a thin base cloth of 50 g / m 2 or less.
【0015】ここでいう縫糸番手とは、JISL−25
10、L−2511およびL−2512などに規定され
る化合繊縫糸と呼ぶ縫糸の番手を示し、フィラメント縫
糸の場合は、番手とデニールの関係は、概略、10番手
が740〜800デニール、20番手が600〜720
デニール、30番手が400〜480デニール、40番
手が270〜330デニール、50番手が200〜24
0デニールである。紡績糸縫糸の場合は、上記各JIS
に記載の数値表のデシテックスから換算すればよい。[0015] The thread count here is JISL-25.
The number of the thread called synthetic fiber sewing thread defined in 10, L-2511, L-2512, etc. is shown. In the case of the filament thread, the relationship between the number and denier is roughly 740 to 800 denier in 10th and 20th in number. Is 600-720
Denier, 30th is 400-480 denier, 40th is 270-330 denier, 50th is 200-24
It is 0 denier. In the case of spun yarn sewing thread, the above JIS
What is necessary is just to convert from the decitex of the numerical table described in.
【0016】又、本発明の別の好ましい態様において
は、縫糸番手Tに対する適正な運針数S(針/mm)を
用いることにより、最適な縫目強力を得ることができ
る。即ち、2≦T/S≦8、より好ましくは3≦T/S
≦7となるように縫糸番手Tに対する運針数S(針/c
m)を特定することが肝要である。In another preferred embodiment of the present invention, an optimal stitch strength can be obtained by using an appropriate number of stitches S (needle / mm) for the thread count T. That is, 2 ≦ T / S ≦ 8, more preferably 3 ≦ T / S
The number of stitches S relative to the thread count T (needle / c so that ≦ 7)
It is important to specify m).
【0017】T/Sが2より小さいと縫目が密になり、
縫合部が粗硬となるだけでなく、縫製のための工数も増
える。又、T/Sが8より大きいと、縫目が粗になり過
ぎ、適性な縫目強力を確保することができない。If T / S is less than 2, the seams become denser,
Not only the sewn portion becomes coarse, but also the man-hour for sewing increases. On the other hand, if the T / S is larger than 8, the seam becomes too coarse, and an appropriate seam strength cannot be secured.
【0018】本発明の縫製に用いるミシン針は、従来の
エアバッグに用いられている20番手以上の太い針よ
り、20番手以下の細いミシン針、例えば針番手18番
手、16番手などを用いるとよい。又、針の先端部の丸
い、ボールポイント型と呼ぶミシン針を用いると更に効
果的である。As the sewing needle used for sewing according to the present invention, a thin sewing needle of 20 or less, such as a 18th or 16th needle, is used as compared to a thick needle of 20 or more used in the conventional airbag. Good. Further, it is more effective to use a sewing machine needle called a ball point type having a rounded tip portion.
【0019】又、本発明になる縫目仕様は、使用する基
布、バッグ形状、要求される縫合部強度などに応じて選
定すればよく、例えば、本縫い、片伏せ縫い、オーバー
ロック縫い、安全縫い、千鳥縫い、飾り縫いなどがあ
り、これらの組み合わせでもよい。The seam specifications according to the present invention may be selected according to the base fabric to be used, the shape of the bag, the required strength of the seam, and the like. There are safety stitching, staggered stitching, decorative stitching, and the like, and a combination thereof may be used.
【0020】使用する縫糸が、上糸、下糸などで縫糸番
手の異なる場合は、いずれの縫糸も、本発明の関係式
(1)式及び(2)式の関係を満足することが望ましい
が、上糸又は下糸などいずれか一方のみが(1)式及び
(2)式の関係を満足する場合も、本発明の範囲に入る
ものとする。また、縫糸の上糸、下糸などで異なる耐熱
性繊維糸条を用いてもよいし、場合によっては、上糸、
下糸のどちらか一方に耐熱性ではない汎用の繊維糸条、
例えば、ナイロン6、ナイロン66、ポリエステルなど
を併用してもよい。When the sewing thread used is different in sewing thread number, such as the upper thread and the lower thread, it is desirable that each of the sewing threads satisfies the relational expressions (1) and (2) of the present invention. The case where only one of the upper thread and the lower thread satisfies the relations of the expressions (1) and (2) is also included in the scope of the present invention. Further, different heat-resistant fiber yarns may be used for the upper thread and the lower thread of the sewing thread, and in some cases, the upper thread,
General-purpose fiber yarn that is not heat-resistant to either one of the lower thread,
For example, nylon 6, nylon 66, polyester and the like may be used in combination.
【0021】縫糸の構成は、紡績糸、フィラメント合撚
糸、フィラメント樹脂加工糸など、耐熱性繊維糸条の特
性、性質などにより適宜選定すればよい。The configuration of the sewing thread may be appropriately selected depending on the characteristics and properties of the heat-resistant fiber yarn such as a spun yarn, a filament twisted yarn, and a filament resin processed yarn.
【0022】本発明になるエアバッグの搭載部位は、運
転席、助手席、サイド、後部席など通常使用される中か
ら適宜選定すればよく、エアバッグ袋体の裁断形状は、
円形、長円形、楕円形、矩形、多角形、あるいはこれら
の組み合わせなどいずれでもよく、要望される展開形状
を満たすものであればよい。The mounting portion of the airbag according to the present invention may be appropriately selected from those normally used, such as a driver's seat, a passenger seat, a side seat, a rear seat, and the like.
The shape may be any of a circle, an oval, an ellipse, a rectangle, a polygon, and a combination thereof, and may be any as long as it satisfies a desired developed shape.
【0023】また、本発明の耐熱性繊維糸条から成る縫
糸を使って縫合される部位、例えば、インフレーター取
付口周辺、吊り紐の縫合固定部、排気孔周囲、補強布ま
たは防炎布の縫合固定部、インフレーターからの発生ガ
ス流路調整布の縫合固定部などの仕様も、要望されるエ
アバッグの性能に応じて選定すればよい。Further, a portion to be sewn using the heat-resistant fiber thread of the present invention, for example, around the inflator attachment opening, a sewn fixing portion of a hanging string, around an exhaust hole, suturing a reinforcing cloth or a flameproof cloth. The specifications of the fixing portion, the stitching fixing portion of the cloth for adjusting the gas flow passage generated from the inflator, and the like may be selected according to the required performance of the airbag.
【0024】例えば、インフレーター取付口は円形、長
円形、矩形、正方形などいずれでもよく、ボルトやリベ
ットによる固定金具への固定部の内側、外側などを縫合
すればよい。吊り紐は、インフレーター取付側の補強布
や本体布帛への固定部を縫合すればよい。また、単一あ
るいは複数の円形、長円形、多角形の排気孔の周辺に補
強布を重合し縫合してもよいし、あるいは排気孔の周囲
を縫糸のみで縫製してもよい。ガス流路調整布の縫合固
定部も、バッグ形状に応じて特定すればよいが、例えば
サイドバッグのような小さなバッグにおいては、外周に
近い部分に設定してもよい。For example, the inflator mounting opening may be any of a circle, an oval, a rectangle, and a square, and the inside and outside of the fixing portion to the fixing bracket with bolts and rivets may be stitched. The suspension string may be sutured to a portion fixed to the reinforcing cloth or the main body cloth on the inflator mounting side. Further, a reinforcing cloth may be superimposed and sewn around a single or a plurality of circular, oval, or polygonal exhaust holes, or the periphery of the exhaust hole may be sewn with only a sewing thread. The suturing fixing portion of the gas flow path adjusting cloth may be specified according to the shape of the bag. For example, in a small bag such as a side bag, it may be set to a portion near the outer periphery.
【0025】また、場合によっては耐熱性繊維糸条を用
いることなく、ナイロン6、ナイロン66またはポリエ
ステルなどの縫糸により縫合した部位あるいはその近辺
を、耐熱性繊維糸条から成る縫糸により重ねて縫合して
もよい。In some cases, without using a heat-resistant fiber thread, a portion sewn with a sewing thread such as nylon 6, nylon 66, or polyester or the vicinity thereof is overlapped with a sewing thread made of a heat-resistant fiber thread and sewn. You may.
【0026】本発明のエアバッグを構成する布帛は、通
常の織編物、二軸、三軸などの多軸織編物、二重、三重
などの多重織編物、不織布、シート、フィルム、メッシ
ュ状シート、格子状シートあるいはこれらの二種以上の
複合体組み合わせなどの中から適宜選定すればよい。The fabric constituting the airbag of the present invention may be a normal woven or knitted fabric, a multiaxial woven or knitted fabric such as biaxial or triaxial, a multiple woven or knitted fabric such as double or triple, a nonwoven fabric, a sheet, a film, a mesh sheet. , A lattice sheet or a combination of two or more of these.
【0027】また、インフレーターの性能、エアバッグ
の形状、搭載部位などによっては、これらの布帛にゴム
や耐熱性樹脂などを積層、塗布し不通気加工を施しても
よいし、全く不通気加工を行わないノンコート布帛でも
よい。ノンコート布帛の場合、精練、乾燥、熱セットな
どを行えばよく、熱セットなどの条件は、通気性、機械
特性などを考慮して選定すればよく、通気性を調整する
ためにカレンダー加工などを施してもよい。Depending on the performance of the inflator, the shape of the airbag, the mounting portion, etc., these cloths may be laminated and coated with rubber, heat-resistant resin, or the like, and may be subjected to impervious processing, or may be subjected to impervious processing at all. A non-coated fabric that is not performed may be used. In the case of non-coated cloth, scouring, drying, heat setting, etc. may be performed, and conditions such as heat setting may be selected in consideration of air permeability, mechanical characteristics, etc. May be applied.
【0028】更に、これらの布帛を構成する繊維糸条
は、特に限定するものでなく、ポリアミド繊維、ポリエ
ステル繊維、アラミド繊維などの汎用繊維あるいはこれ
らの混合繊維から選定すればよく、太さも100〜15
00デニールの範囲でよく、単糸デニールも0.5〜6
デニールの中から選定すればよい。Further, the fiber yarns constituting these fabrics are not particularly limited, and may be selected from general-purpose fibers such as polyamide fibers, polyester fibers, and aramid fibers, or mixed fibers thereof, and have a thickness of 100 to 100%. Fifteen
It may be in the range of 00 denier and single yarn denier is 0.5-6.
It can be selected from denier.
【0029】これらの繊維糸条には紡糸性や加工性、材
質の耐久性を改良するために通常使用されている各種の
添加剤、例えば耐熱安定剤、酸化紡糸剤、耐光安定剤、
老化防止剤、潤滑剤、平滑剤、顔料、溌水剤、溌油剤、
酸化チタンなどの隠蔽剤、光沢付与剤、難撚剤、可塑剤
などの一種または二種以上を使用してもよい。また、場
合によっては、加撚、嵩高加工、捲縮加工、捲回加工な
どの加工を施してもよい。Various additives usually used for improving spinnability, processability, and durability of materials are added to these fiber yarns, for example, heat stabilizers, oxidative spinners, light stabilizers, and the like.
Anti-aging agent, lubricant, leveling agent, pigment, water repellent, oil repellent,
One or more of a hiding agent such as titanium oxide, a gloss imparting agent, a twist-resistant agent, a plasticizer and the like may be used. In some cases, processing such as twisting, bulking, crimping, and winding may be performed.
【0030】更に、糸条は、長繊維のフィラメント、短
繊維の紡績糸、これらの複合糸など、特に限定されな
い。Further, the yarn is not particularly limited, such as filaments of long fibers, spun yarns of short fibers, and composite yarns thereof.
【0031】[0031]
【実施例】以下、実施例により本発明をより具体的に説
明する。実施例の中で、縫糸の特性評価およびエアバッ
グの性能評価は以下の方法によった。The present invention will be described more specifically with reference to the following examples. In the examples, the following methods were used to evaluate the characteristics of the thread and the performance of the airbag.
【0032】縫糸の破断伸度:JISL−1013
7.5.1法に準じて縫糸の引張強力および破断伸度を
測定した。Elongation at break of sewing thread: JISL-1013
The tensile strength and breaking elongation of the suture were measured according to the method described in 7.5.1.
【0033】展開試験:運転席用インフレーター(非ア
ザイド型、60リットル最高タンク圧185kpa)、
固定金具、樹脂製カバーを使用し、バッグを折り畳みモ
ジュールに組み込み、85℃で4時間予熱後、展開試験
を行い、展開後のバッグの損傷状態を観察する。Deployment test: driver inflator (non-azide type, 60 liter maximum tank pressure 185 kpa),
The bag is assembled into a folding module using a fixing bracket and a resin cover. After preheating at 85 ° C. for 4 hours, a deployment test is conducted, and the damaged state of the bag after deployment is observed.
【0034】実施例1 ナイロン66繊維420d/140f(原糸強度9.4
g/d)を用いて、織物密度、経51本/吋、緯51本
/吋の平織物を製織し、精練、熱セットし、経、緯各5
3本/吋のノンコート織物を得た。次に、ノンコート織
物から、図1、2に示す外径φ720mmの円形布
(1,2)を2枚裁断し、一方の円形布1の中央部にイ
ンフレーター取付口としてφ70mmの開口部を設け、
更に排気孔としてφ35mmの円形穴を2ケ所設けた。Example 1 Nylon 66 fiber 420d / 140f (raw yarn strength 9.4)
g / d), weave a plain weave with a fabric density of 51 warps / inch, 51 wefts / inch, scour, heat set, 5
3 / inch non-coated fabric was obtained. Next, from the non-coated fabric, two circular cloths (1, 2) having an outer diameter of φ720 mm shown in FIGS. 1 and 2 are cut, and an opening of φ70 mm is provided in the center of one circular cloth 1 as an inflator mounting port.
Further, two circular holes having a diameter of 35 mm were provided as exhaust holes.
【0035】一方、上記ノンコート織物からインフレー
ター取付口の補強布用として、図3(1)に示す外径φ
220mm、内径φ70mmのドーナツ状円形布を3枚
裁断した。On the other hand, the above-mentioned non-coated fabric is used as a reinforcing cloth for an inflator mounting opening by using an outer diameter φ shown in FIG.
Three donut-shaped circular cloths having a diameter of 220 mm and an inner diameter of 70 mm were cut.
【0036】円形布1の中央開口部にドーナツ状円形布
を3枚重ね合わせて、PPS繊維の縫糸20番手を上
糸、下糸の両方に用い、運針数5針/cmの本縫いによ
り、縫目径を内側から順に、φ80mm、φ135m
m、φ195mmの三層で縫合わせた。縫糸の破断伸度
は28%、引張強度は4.5g/dであった。Three donut-shaped circular cloths are superimposed on the central opening of the circular cloth 1, and the 20th thread of the PPS fiber is used for both the upper thread and the lower thread. The seam diameter is φ80mm, φ135m in order from the inside.
sewn in three layers of m and φ195 mm. The breaking elongation of the suture was 28%, and the tensile strength was 4.5 g / d.
【0037】補強布3枚と円形布1は織物の糸軸を全て
合わせた位置で重ね合わせた。更に、排気孔補強布とし
て、外径φ70mm、内径φ35mmのドーナツ状円形
布を2枚裁断し、それぞれの排気孔に1枚の補強布を円
形布の織物の糸軸に対してバイアスとなるように重ね合
わせ、ナイロン66繊維の縫糸8番糸を上糸、下糸に用
い、運針数3.5針/cmで、縫目径φ50mmを本縫
いで縫い合わせた。そして、補強布片が縫合された円形
布1の中央部に、図4に示すようにインフレーター取付
用ボルト孔として穴径φ5.5mmの穴を円形布1の織
物の糸軸方向、4ケ所に開孔した。The three reinforcing cloths and the circular cloth 1 were overlapped at a position where all yarn axes of the woven cloth were aligned. Further, as an exhaust hole reinforcing cloth, two donut-shaped circular cloths having an outer diameter of φ70 mm and an inner diameter of φ35 mm are cut, and one reinforcing cloth is provided in each of the exhaust holes so as to be biased with respect to the yarn axis of the woven circular cloth. And sewing was performed using a sewing thread No. 8 of nylon 66 fiber as the upper thread and the lower thread, with a stitch number of 3.5 stitches / cm, and a stitch diameter of 50 mm and a final stitch. Then, as shown in FIG. 4, holes having a hole diameter of 5.5 mm are formed as bolt holes for inflator mounting at four positions in the thread axis direction of the woven fabric of the circular cloth 1 in the center of the circular cloth 1 to which the reinforcing cloth pieces are sewn. A hole was opened.
【0038】次いで、円形布1と2を、それぞれの織物
の糸軸を45°ずらして重ね合わせ、外周径から20m
m内側を縫合わせた。縫糸は、上糸にナイロン66繊維
の5番糸、下糸にナイロン66繊維の8番糸を用い、運
針数3.5針/cmにて二重環縫い(二列)で縫製し
た。Next, the circular cloths 1 and 2 are overlapped with each other with the yarn axis of each woven fabric shifted by 45 °, and 20 m from the outer diameter.
m inside was sewn. The sewing thread was sewn by double chain stitching (two rows) at 3.5 stitches / cm using a nylon thread No. 5 thread as the upper thread and a nylon thread No. 8 thread as the lower thread.
【0039】得られたエアバッグを円形布1の中央口か
ら反転し、展開試験に供した。展開後のバッグは、イン
フレーター取付口周辺の縫糸、バッグ基布いずれにも異
常は認められなかった。The obtained airbag was inverted from the center opening of the circular cloth 1 and subjected to a deployment test. After the bag was deployed, no abnormality was found in any of the sewing thread and the bag base cloth around the inflator attachment opening.
【0040】比較例1 実施例1において、PPS繊維から成る縫糸を用いる代
わりに、(1)ナイロン66繊維から成る5番手(引張
強度7.2g/d、破断伸度32%)、(2)パラ−ア
ラミド繊維(東レ・デュポン社製ケブラー)から成る2
0番手糸(引張強度21.0g/d、破断伸度3.8
%)を用いた以外は、実施例1に準じてエアバッグを作
成し、展開試験を行った。展開後のエアバッグは、
(1)の場合は、中層の縫糸が一部溶融しエアバッグ基
布もそこから破損し、(2)の場合は、縫糸の溶融はな
いが、縫糸の伸度が小さいため、外層の縫目穴が大きく
拡大され、熱ガスの吹き抜けにより一部基布が溶融し破
損した。Comparative Example 1 In Example 1, instead of using a sewing thread made of PPS fiber, (1) 5th yarn made of nylon 66 fiber (tensile strength 7.2 g / d, elongation at break 32%), (2) 2 composed of para-aramid fiber (Kevlar manufactured by Dupont Toray)
No. 0 yarn (tensile strength 21.0 g / d, elongation at break 3.8
%), An airbag was prepared according to Example 1, and a deployment test was performed. The airbag after deployment is
In the case of (1), the sewing thread in the middle layer is partially melted and the airbag base fabric is also damaged therefrom. In the case of (2), the sewing thread is not melted but the elongation of the sewing thread is small, so that the sewing of the outer layer is small. The holes were greatly enlarged, and the base fabric was partially melted and broken by the blow-through of hot gas.
【0041】実施例2 実施例1において、インフレーター取付口補強布3枚の
うち1枚を吊り紐の縫付部を図3(2)に示すように左
右の2ケ所に設けた変形円形状とし、別に中央部にφ1
20mmの円形部のある、幅80mm、長さ500mm
の吊り紐を裁断し、中央円形部を円形布2の中央に重ね
合わせ、ナイロン66繊維から成る縫糸20番手を上
糸、下糸に用い、縫目径φ84mm、φ90mmの二列
を運針数5針/cmにて本縫で縫合わせた。また、吊り
紐のそれぞれの両端部を上記吊り紐縫付用の補強布の左
右に縫い付けた。縫糸は、メタ系アラミド繊維(東レ
デュポン社製品ノメックス)から成る30番手(引張強
度5.5g/d、引張伸度24%)を上糸、下糸に用
い、運針数6針/cmで本縫いで縫い合わせた。Example 2 In Example 1, one of the three reinforcing cloths for the inflator attachment opening was formed into a deformed circular shape in which the sewn portions of the hanging strings were provided at two places on the left and right as shown in FIG. 3 (2). , Separately φ1 in the center
80mm width, 500mm length with 20mm circular part
And the center circular portion is superimposed on the center of the circular cloth 2, and the 20th thread made of nylon 66 fiber is used for the upper thread and the lower thread. The stitches were sewn with needles / cm. In addition, both ends of the hanging string were sewn to the left and right sides of the reinforcing cloth for sewing the hanging string. The sewing thread is a meta-aramid fiber (Toray
Using No. 30 (a tensile product of DuPont) (tensile strength: 5.5 g / d, tensile elongation: 24%) as the upper thread and the lower thread, sewing was performed by lock stitch at a stitch number of 6 stitches / cm.
【0042】上記吊り紐の縫付け固定に関する以外は全
て実施例1に準じてエアバッグを作成し、展開試験を行
った。展開後のエアバッグのインフレーター取付口周辺
の縫糸、バッグ基布のいずれにも異常はなく、また吊り
紐縫付部にも何ら異常は認められなかった。An airbag was prepared in the same manner as in Example 1 except that the hanging string was sewn and fixed, and a deployment test was performed. No abnormality was found in any of the sewing thread around the inflator mounting opening of the airbag after deployment and the bag base fabric, and no abnormality was found in the sewn portion of the hanging string.
【0043】比較例2 実施例2において、吊り紐の両端部縫付け固定部の縫製
仕様を(1)縫糸番手を5番手(引張強度5.0g/
d、破断伸度31%)、運針数3針/cm、(2)縫糸
番手を50番手(引張強度5.6g/d、破断伸度26
%)、運針数5.5針/cmとした以外は実施例2に準
じてエアバッグを作成し、展開試験を行った。展開後の
エアバッグは(1)の場合、縫糸が太いため、縫目の穴
が大きく拡大し、吊り紐の一部が破損し、(2)の場
合、縫糸の細さに比べ運針数が足らず縫目強力が不足し
たため、縫糸が破断した。Comparative Example 2 In Example 2, the sewing specifications of the both ends of the hanging string were fixed as follows: (1) The thread number was 5 (the tensile strength was 5.0 g /
d, breaking elongation 31%), number of stitches 3 stitches / cm, (2) sewing thread count 50 (tensile strength 5.6 g / d, breaking elongation 26)
%), And an airbag was prepared according to Example 2 except that the number of needles moved was 5.5 needles / cm, and a deployment test was performed. In the deployed airbag, in (1), the sewing thread is large because the sewing thread is thick, and the hole of the seam is greatly enlarged, and a part of the hanging string is damaged. The sewing thread was broken due to insufficient seam strength.
【0044】[0044]
【表1】 [Table 1]
【0045】[0045]
【発明の効果】本発明になるエアバッグは、インフレー
ターからの熱ガスの影響を受けやすい部分の縫合部を、
耐熱性繊維糸条から成り、かつ破断伸度の高い縫糸によ
り縫合わせるため、熱ガスに対する耐熱性と展開時の急
激な伸張挙動にも耐え得る、堅牢なエアバッグであり、
乗員保護用のエアバッグシステムの搭載を更に促進する
ことができる。According to the airbag of the present invention, the sewn portion of the portion susceptible to the hot gas from the inflator is provided.
It is a robust airbag that is made of heat-resistant fiber yarn and stitched with a high breaking elongation, so it can withstand heat gas heat and withstand sudden expansion behavior during deployment.
The installation of the airbag system for protecting the occupant can be further promoted.
【図1】エアバッグの袋体の一部を構成するインフレー
ター取付口を備えた円形布の実施例を示す説明図。FIG. 1 is an explanatory view showing an embodiment of a circular cloth provided with an inflator mounting port which forms a part of a bag body of an airbag.
【図2】同上円形布と縫製される別の円形布の説明図。FIG. 2 is an explanatory diagram of another circular cloth sewn with the above circular cloth.
【図3】インフレーター取付口周辺の補強布の説明図
で、(1)、(2)はその例を示す。FIG. 3 is an explanatory view of a reinforcing cloth around an inflator mounting opening, and (1) and (2) show examples thereof.
【図4】補強布とインフレーターへの固定用ボルト孔の
説明図。FIG. 4 is an explanatory view of a reinforcing cloth and bolt holes for fixing to an inflator.
Claims (3)
エアバッグにおいて、該縫合部の少なくとも一部が、エ
アバッグ本体を構成する繊維材料の融点または分解点よ
り高い融点または分解点をもつ耐熱性繊維糸条からな
り、破断伸度が15%以上である縫糸を用いて縫製さ
れ、かつ、前記耐熱性繊維糸条からなる縫糸により縫製
されている縫合部が下記に示す(1)式を満足する縫糸
番手Tで縫製されていることを特徴とするエアバッグ。 (1)10≦T≦501. An airbag comprising a plurality of members sewn together, wherein at least a part of the sewn portion has a melting point or a decomposition point higher than a melting point or a decomposition point of a fiber material constituting the airbag body. The sewn portion sewn with a heat-resistant fiber yarn having a breaking elongation of 15% or more and sewn with the heat-resistant fiber yarn is represented by the following formula (1). An airbag characterized by being sewn with a thread count T satisfying the following. (1) 10 ≦ T ≦ 50
エアバッグにおいて、該縫合部の少なくとも一部が、エ
アバッグ本体を構成する繊維材料の融点または分解点よ
り高い融点または分解点をもつ耐熱性繊維糸条からな
り、破断伸度が15%以上である縫糸を用いて縫製さ
れ、かつ前記耐熱性繊維糸条からなる縫糸により縫製さ
れている縫合部が下記に示す(2)式を満足する運針数
S(針/cm)で縫製されていることを特徴とするエア
バッグ。 (2)2≦T/S≦82. An airbag formed by suturing a plurality of members, wherein at least a part of the sewn portion has a melting point or a decomposition point higher than a melting point or a decomposition point of a fiber material constituting the airbag body. A sewn portion made of a heat-resistant fiber thread and sewn with a thread having a breaking elongation of 15% or more and sewn with the heat-resistant fiber thread is represented by the following formula (2). An airbag characterized by being sewn with a satisfactory number of needle movements S (needle / cm). (2) 2 ≦ T / S ≦ 8
エアバッグにおいて、該縫合部の少なくとも一部が、エ
アバッグ本体を構成する繊維材料の融点または分解点よ
り高い融点または分解点をもつ耐熱性繊維糸条からな
り、破断伸度が15%以上である縫糸を用いて縫製さ
れ、かつ前記耐熱性繊維糸条からなる縫糸により縫製さ
れている縫合部が下記に示す(1)式および(2)式を
満足する縫合番手Tならびに運針数S(針/cm)で縫
製されていることを特徴とするエアバッグ。 (1)10≦T≦50 (2)2≦T/S≦83. An airbag comprising a plurality of members sewn together, wherein at least a part of the sewn portion has a melting point or a decomposition point higher than a melting point or a decomposition point of a fiber material constituting the airbag body. The sewn portion formed of a heat-resistant fiber thread and sewn with a thread having a breaking elongation of 15% or more and sewn with the heat-resistant fiber thread is represented by the following formula (1) and An airbag characterized by being sewn with a suture count T and a stitch count S (needle / cm) satisfying the expression (2). (1) 10 ≦ T ≦ 50 (2) 2 ≦ T / S ≦ 8
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9360639A JPH11189116A (en) | 1997-12-26 | 1997-12-26 | Air bag |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9360639A JPH11189116A (en) | 1997-12-26 | 1997-12-26 | Air bag |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11189116A true JPH11189116A (en) | 1999-07-13 |
Family
ID=18470279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9360639A Pending JPH11189116A (en) | 1997-12-26 | 1997-12-26 | Air bag |
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Country | Link |
---|---|
JP (1) | JPH11189116A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6749220B1 (en) * | 2001-02-16 | 2004-06-15 | Key Safety Systems, Inc. | Air bag and method of construction |
JP2006284570A (en) * | 2005-03-14 | 2006-10-19 | Takata Corp | Method for determining allowed deployment value of air bag |
-
1997
- 1997-12-26 JP JP9360639A patent/JPH11189116A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6749220B1 (en) * | 2001-02-16 | 2004-06-15 | Key Safety Systems, Inc. | Air bag and method of construction |
JP2006284570A (en) * | 2005-03-14 | 2006-10-19 | Takata Corp | Method for determining allowed deployment value of air bag |
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