JPH09119066A - Air bag - Google Patents
Air bagInfo
- Publication number
- JPH09119066A JPH09119066A JP8148848A JP14884896A JPH09119066A JP H09119066 A JPH09119066 A JP H09119066A JP 8148848 A JP8148848 A JP 8148848A JP 14884896 A JP14884896 A JP 14884896A JP H09119066 A JPH09119066 A JP H09119066A
- Authority
- JP
- Japan
- Prior art keywords
- airbag
- urethane
- thermoplastic film
- layer
- thermoplastic
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
- B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
- B29C65/5071—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/133—Fin-type joints, the parts to be joined being flexible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/729—Textile or other fibrous material made from plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
- B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
- B29C65/5028—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being textile in woven or non-woven form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
- B29L2022/02—Inflatable articles
- B29L2022/027—Air bags
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Air Bags (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、軽量で機械的強度
の高いウレタン等の熱可塑性フィルムを有するエアバッ
グ表地および裏地同士を接合するエアバッグに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag having a lightweight and high mechanical strength thermoplastic film of urethane or the like, which joins an outer surface and a backing of the air bag.
【0002】[0002]
【従来の技術】自動車のステアリングホイール、助手
席、ドア、後部座席あるいは天井等に取り付けられて乗
員保護のために使用されるエアバッグは、通常、シリコ
ン、ゴム等を織布にコーティング架橋したエアバッグ用
基布を裁断したものを袋状に縫製して製造される。ま
た、エアバッグにはガス発生器に臨んでべースプレート
に取り付けられるためのインフレータ用開口部および効
果的に衝撃を吸収するためのベント用開口が設けられ、
これらの開口部の周囲を補強するためにエアバッグと同
部材の補強布が縫合される。そして近年、エアバッグの
軽量化、機械的強度向上のためや経年劣化の少ない素材
として各種合成樹脂層がラミネートされたエアバッグ布
が提案されてきており、これら布同士を接合する接合方
法として高周波溶着等による熱溶着が行われる。このよ
うな熱溶着によりエアバッグ布同士が接合されたものと
して、例えば特開平2−114035号、特開平2−1
62134号、特開平3−7337号、特開平6−19
9198号公報に記載されたような従来例がある。2. Description of the Related Art An airbag mounted on a steering wheel, a passenger seat, a door, a rear seat or a ceiling of an automobile and used for protecting an occupant is usually an airbag obtained by coating silicon, rubber, or the like with a woven fabric coated and crosslinked. It is manufactured by cutting the base fabric for a bag and sewing it into a bag shape. In addition, the airbag is provided with an opening for an inflator to be attached to a base plate facing the gas generator and an opening for a vent for effectively absorbing impact,
In order to reinforce the periphery of these openings, a reinforcing cloth of the same member as the airbag is sewn. In recent years, airbag fabrics in which various synthetic resin layers have been laminated have been proposed as materials for reducing the weight of airbags, improving mechanical strength, and reducing deterioration over time. Thermal welding by welding or the like is performed. For example, Japanese Patent Application Laid-Open (JP-A) No. 2-114035 and Japanese Patent Application Laid-Open (JP-A) No. 2-1
No. 62134, JP-A-3-7337, JP-A-6-19
There is a conventional example as described in JP-A-9198.
【0003】これらの1つを図7によって説明すると、
図7(B)に示したようなエアバッグ21は表布帛22
と裏布帛23とが接合部24にて接合されて袋状に形成
される。符号26はガス注入口である。前記各布帛は図
7(A)に示すようにポリエステル系樹脂層22Bがプ
ライマーコート層22Aを介してラミネートされてい
る。そしてこれら表裏の布帛22、23は、図7(C)
に示すようにポリエステル系樹脂層22B、23B同士
を接合部24にて当接して熱溶着したものである。これ
によって、接合部24の硬さ、折曲げ性に優れ、布帛と
樹脂層との接着強度および樹脂層同士の溶着強度に優れ
た接合が可能になった。ところが、このような接合部2
4において、エアバッグ21が膨張して表裏の布帛2
2、23が図7(B)のように互いに離れ、前記接合部
24の各層間には大きな剥離力が作用する。ポリエステ
ル系樹脂層22B、23B間の溶着強度(剥離強度)は
かなり高いので、ポリエステル系樹脂層22B、23B
間においては剥離する虞れはないものの、布帛22(2
3)とプライマーコート層22A(23A)との間の剥
離強度はそれほど高いものではないので、この層間にて
剥離が生じる虞れがあった。[0003] One of these will be described with reference to FIG.
The airbag 21 as shown in FIG.
And the backing fabric 23 are joined at the joining portion 24 to form a bag. Reference numeral 26 denotes a gas inlet. As shown in FIG. 7 (A), each of the above fabrics has a polyester resin layer 22B laminated via a primer coat layer 22A. And these front and back fabrics 22 and 23 are shown in FIG.
As shown in FIG. 7, the polyester resin layers 22B and 23B are brought into contact with each other at a joint 24 and heat-welded. As a result, it is possible to join the joint portion 24 with excellent hardness and bendability, and with excellent adhesive strength between the fabric and the resin layer and excellent welding strength between the resin layers. However, such a joint 2
In 4, the airbag 21 is inflated and
As shown in FIG. 7B, the layers 2 and 23 are separated from each other, and a large peeling force acts between the layers of the joint 24. Since the welding strength (peeling strength) between the polyester resin layers 22B and 23B is considerably high, the polyester resin layers 22B and 23B
Although there is no risk of peeling between the fabrics 22 (2
Since the peel strength between 3) and the primer coat layer 22A (23A) is not so high, there is a possibility that peeling may occur between the layers.
【0004】そこで、このような合成樹脂層がラミネー
トされたエアバッグ布同士を熱溶着により接合された接
合面における合成樹脂層と布との間の剥離を防止するも
のとして前述した特開平2−162134号公報に示さ
れたものが提案された。これを図8によって説明する
と、エアバッグ31は少なくとも一面がゴムまたは熱可
塑性樹脂により被覆された2枚の基布32および33を
備え、前記ゴムまたは熱可塑性樹脂が被覆された面が内
側となるように重ね合わされ、これら基布の外周端部間
に前記基布と同様の被覆材にて被覆された補強布34が
介在されて熱溶着されたものである。これによって、表
裏の基布32、33が離れる剥離方向の力を補強布34
と各基布32、33との間の剪断方向の力にて受けるよ
うに構成して、接合面における強度を高めたものであ
る。[0004] In order to prevent peeling between the synthetic resin layer and the cloth at the joint surface where the airbag cloths laminated with such a synthetic resin layer are joined together by thermal welding, the above-mentioned Japanese Patent Application Laid-Open No. Hei. The thing shown in 162134 was proposed. Referring to FIG. 8, the airbag 31 includes two base cloths 32 and 33 each having at least one surface coated with rubber or a thermoplastic resin, and the surface coated with the rubber or the thermoplastic resin is on the inner side. The reinforcing cloth 34 covered with the same covering material as that of the base cloth is interposed between the outer peripheral ends of the base cloths and heat-welded. As a result, the force in the peeling direction in which the front and back base fabrics 32 and 33 are separated from each other is increased by the reinforcing cloth 34.
And the base fabrics 32 and 33 receive the force in the shearing direction to increase the strength at the joint surface.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな補強布34の介在は、表裏の基布32、33が接合
面からほぼ直角に離れた面に沿って添設する必要があ
り、接合面が2次元であるのに対して補強布34を3次
元的に配置してこれらを接合しなければならなかった。
このため、熱溶着例えば高周波溶着装置等が複雑になる
他、補強布34が筒状体であるために、その製作が面倒
であった。また、無理に2次元的に接合しようとする
と、接合面にしわが残るという問題もあった。However, the interposition of such a reinforcing cloth 34 requires the front and back base cloths 32, 33 to be provided along a plane which is substantially perpendicular to the joint surface. Is two-dimensional, but the reinforcing cloth 34 must be three-dimensionally arranged and joined.
For this reason, the heat welding, for example, a high-frequency welding device or the like becomes complicated. In addition, since the reinforcing cloth 34 is a tubular body, its production is troublesome. In addition, there is a problem that if it is attempted to forcibly join in two dimensions, wrinkles remain on the joining surface.
【0006】そこで、本発明は、以上述べてきたような
従来のエアバッグにおける諸課題を解決して、簡素な接
合方法により、接着性に優れて接合部の強度が高い、接
合面にウレタン等の熱可塑性フィルムを有するエアバッ
グ表地および裏地同士を接合したエアバッグを提供す
る。Therefore, the present invention solves the problems in the conventional airbag as described above, and uses a simple joining method to provide excellent adhesiveness and high strength of the joint portion, such as urethane on the joint surface. There is provided an airbag in which an airbag outer material and a lining material having the thermoplastic film are joined.
【0007】[0007]
【課題を解決するための手段】このため本発明では、前
記課題を解決するための手段として、袋状のエアバッグ
を構成する表地と裏地の外周接合部の少なくとも接合面
にウレタン等の熱可塑性フィルムがラミネートされたエ
アバッグ表地および裏地同士の前記接合面における熱可
塑性フィルム間に、前記外周接合部よりエアバッグ中心
側の中間層に高周波溶着絶縁層を形成したウレタン等の
熱可塑性フィルムからなる接着補強層を介在させて前記
接合面を高周波溶着等の熱溶着によりエアバッグ表地お
よび裏地同士を接合したことを特徴とするもので、これ
を課題解決のための手段とするものである。 また本発
明は、前記表地および裏地がウレタン等の熱可塑性フィ
ルムからなることを特徴とするものである。また本発明
は、前記表地および裏地とそれらにラミネートされるウ
レタン等の熱可塑性フィルムとがそれぞれ一体に形成さ
れたことを特徴とするものである。また本発明では、前
記接着補強層はウレタン等の熱可塑性フィルムあるいは
両面にウレタン等の熱可塑性フィルムがラミネートされ
た2層の基布から形成してもよいし、ほぼY字形断面の
ウレタン等の熱可塑性フィルムの前記Y字形断面の分離
層間に高周波溶着絶縁層を形成してもよく、また、前記
接着補強層は、一側に所定間隔にてスリットが切り込ま
れたテープ状体を円形につないで形成されてもよいもの
で、これらを課題解決のための手段とするものである。Therefore, in the present invention, as a means for solving the above-mentioned problems, as a means for solving the above-mentioned problems, a thermoplastic material such as urethane is provided on at least the joint surface of the outer peripheral joint portion of the outer lining and the lining constituting the bag-shaped airbag. A film made of a thermoplastic film such as urethane having a high-frequency welding insulating layer formed in an intermediate layer on the airbag center side from the outer peripheral joint between the thermoplastic films on the joint surface between the air bag outer layer and the lining. This is characterized in that the air bag outer material and the lining material are joined together by heat welding such as high-frequency welding on the joint surface with an adhesive reinforcing layer interposed, and this is a means for solving the problem. Further, the present invention is characterized in that the outer material and the lining are made of a thermoplastic film such as urethane. Further, the present invention is characterized in that the front and back fabrics and a thermoplastic film such as urethane laminated on them are integrally formed. Further, in the present invention, the adhesion reinforcing layer may be formed from a thermoplastic film such as urethane or a two-layered base cloth laminated on both sides with a thermoplastic film such as urethane. A high frequency welding insulation layer may be formed between the separation layers of the Y-shaped cross section of the thermoplastic film, and the adhesive reinforcement layer may be formed by cutting a tape-shaped body having slits formed on one side at predetermined intervals into a circular shape. They may be formed by connecting them, and these are used as means for solving the problems.
【0008】[0008]
【作用】本発明では、袋状のエアバッグを構成する表地
2と裏地3の外周接合部4の少なくとも接合面にウレタ
ン等の熱可塑性フィルム2U、3Uがラミネートされた
エアバッグ表地および裏地2、3同士の前記接合面にお
ける熱可塑性フィルム2U、3U間に、前記外周接合部
4よりエアバッグ1の中心側の中間層に高周波溶着絶縁
層13を形成したウレタン等の熱可塑性フィルムからな
る接着補強層12A、12Bを介在させて高周波溶着に
よりエアバッグ表地および裏地2、3同士を電極14
A、14B間において高周波溶着等の熱溶着にて接合す
るので、前記高周波溶着絶縁層13が形成された範囲で
は熱可塑性フィルム2Uと接着補強層12Cおよび熱可
塑性フィルム3Uと接着補強層12Dとは強固に溶着す
るものの、接着補強層12Cと12Dとは溶着すること
なく分離され、また、前記絶縁層を除いた範囲では熱可
塑性フィルム2U、3Uおよび接着補強層12A、12
Bの各層が一体強固に溶着される。In the present invention, the outer surface of the airbag 2 and the lining 2 in which the thermoplastic films 2U and 3U of urethane or the like are laminated on at least the joint surfaces of the outer peripheral joint portion 4 of the outer cloth 2 and the lining 3 which constitute the bag-shaped airbag, Adhesion reinforcement made of a thermoplastic film such as urethane in which a high frequency welding insulating layer 13 is formed in an intermediate layer closer to the center of the airbag 1 than the outer peripheral joint 4 between the thermoplastic films 2U and 3U on the joint surface of the three members. Electrode 14 is applied to the airbag outer material and linings 2 and 3 by high frequency welding with layers 12A and 12B interposed.
Since A and 14B are joined by thermal welding such as high frequency welding, the thermoplastic film 2U and the adhesive reinforcing layer 12C and the thermoplastic film 3U and the adhesive reinforcing layer 12D are provided in the range where the high frequency welding insulating layer 13 is formed. Although firmly welded, the adhesive reinforcing layers 12C and 12D are separated without being welded, and the thermoplastic films 2U and 3U and the adhesive reinforcing layers 12A and 12 are separated in a range excluding the insulating layer.
The layers of B are integrally and firmly welded.
【0009】これによって、接合部が熱溶着されたエア
バッグ1がインフレータ5からの高圧ガスの導入によっ
て作動膨張する際に、互いに分離する表地および裏地
2、3によって接合面が剥離しようとしても、接合面に
おける接着補強層12Aと12Bとの間の強固な溶着に
よってこれを許容せず、しかも絶縁層の範囲の接着補強
層12C、12Dは表地および裏地2、3側に強固に溶
着してその挙動を共にし、剥離方向が剪断方向に変換さ
れた表地2と熱可塑性フィルム2Uとの間および裏地3
と熱可塑性フィルム3Uとの間の分離をも有効に防止す
ることができる。そして、前記熱可塑性フィルム2U、
3Uをラミネートした各表地および裏地2、3、接着補
強層12A、12Bおよび絶縁層13は、平行に設置さ
れた電極14A、14B間において層状に積層するのみ
でよく、外周部が一度に溶着して容易に接合することが
できて、接合装置自体も簡素な構造となる。Thus, when the airbag 1 to which the joint portion is heat-welded is operated and inflated by the introduction of the high-pressure gas from the inflator 5, even if the joint surface is separated by the outer material and the linings 2, 3, which are separated from each other, This is not allowed by the strong welding between the adhesive reinforcing layers 12A and 12B at the joint surface, and the adhesive reinforcing layers 12C and 12D in the range of the insulating layer are firmly welded to the outer and lining 2, 3 sides. Between the surface material 2 and the thermoplastic film 2U having the same behavior and the peeling direction changed to the shearing direction, and the lining 3
And the thermoplastic film 3U can also be effectively prevented from being separated. And the thermoplastic film 2U,
The outer and inner linings 2, 3 laminated with 3U, the adhesive reinforcing layers 12A, 12B, and the insulating layer 13 need only be laminated in layers between the electrodes 14A, 14B installed in parallel, and the outer peripheral portion is welded at one time. And the joining device itself has a simple structure.
【0010】[0010]
【実施の形態】以下本発明の実施の形態を図面に基づい
て説明する。図1は、本発明によるエアバッグの第1実
施の形態を示すもので、エアバッグ1は基布から裁断さ
れたほぼ円形の一対の表地および裏地としての、ナイロ
ン、ポリエステル系樹脂等からなる表布2と裏布3とが
対向して重合され、外周接合部4にて接合されて袋状に
形成される。図1(A)に示すように、裏布3のほぼ中
央には、事故に遭遇した際の減速度等の検知により作動
して高圧ガスをエアバッグ1内に供給するインフレータ
5を装着すべくインフレータ用開口6が穿設され、また
裏布3の適宜の部位にはエアバッグ1の衝撃を効果的に
吸収するためにベント用開口7が穿設される。これらイ
ンフレータ用開口6およびベント用開口7の周囲にはそ
れぞれ補強布8および9が接合される。前記裏布3のイ
ンフレータ用開口の周縁部、インフレータ用開口6の補
強布8およびインフレータ5の取付フランジがリテーナ
11を介して図示しない通しボルト等によりステアリン
グシャフト等に固定されたベースプレート10に固定さ
れる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of an airbag according to the present invention, in which an airbag 1 is a pair of substantially circular outer material cut from a base cloth and a surface made of nylon, polyester resin or the like as a lining material. The cloth 2 and the back cloth 3 face each other and are polymerized, and are joined at the outer peripheral joint portion 4 to form a bag shape. As shown in FIG. 1 (A), an inflator 5 is mounted at substantially the center of the backing cloth 3 to supply high-pressure gas into the airbag 1 by operating upon detection of deceleration or the like when an accident is encountered. An inflator opening 6 is formed, and a vent opening 7 is formed in an appropriate portion of the backing cloth 3 in order to effectively absorb the impact of the airbag 1. Reinforcing cloths 8 and 9 are joined around the inflator opening 6 and the vent opening 7, respectively. The peripheral edge of the inflator opening of the back cloth 3, the reinforcing cloth 8 of the inflator opening 6 and the mounting flange of the inflator 5 are fixed to the base plate 10 fixed to the steering shaft or the like via the retainer 11 by a through bolt or the like not shown. It
【0011】図1(A)のA部断面拡大図である図1
(B)に示すように、前記袋状のエアバッグ1を構成す
る表布2と裏布3とは、それぞれ内側すなわち接合面と
なる側にウレタン等の熱可塑性フィルム2U、3Uがラ
ミネートされている。一般に、近年はエアバッグの軽量
化、機械的強度向上のためや経年劣化の少ない素材とし
てエアバッグを構成する比較的薄い布の全面内側に各種
合成樹脂層がラミネートされているが、許容されるな
ら、接合面近辺のみに合成樹脂層をラミネートしたもの
でもよい。FIG. 1 is an enlarged cross-sectional view of a portion A in FIG.
As shown in (B), the front cloth 2 and the back cloth 3 constituting the bag-shaped airbag 1 are each formed by laminating thermoplastic films 2U, 3U such as urethane on the inside, that is, on the side to be the joining surface. I have. In general, in recent years, various synthetic resin layers have been laminated on the entire inner surface of a relatively thin cloth constituting an airbag as a material for reducing the weight of the airbag, improving mechanical strength, and reducing deterioration over time. Then, a laminate in which a synthetic resin layer is laminated only near the joining surface may be used.
【0012】このように、袋状のエアバッグを構成する
表布2と裏布3の少なくとも接合面にウレタン等の熱可
塑性フィルム2U、3Uがラミネートされたエアバッグ
1の表布2と裏布3とを接合するに、エアバッグ1の外
周接合部4を例にして説明すると、本実施の形態におい
ては、ほぼ平行に上下に間隔を置いて配置された陽電極
14Aと陰電極14Bとの間に、熱可塑性フィルム2
U、3Uを対向させた状態にて表裏の布2、3を対向し
てセットし、これら表裏の布2、3の間に前記熱可塑性
フィルム2U、3Uと同じ程度の接着強度が満足できる
素材のウレタン等の熱可塑性フィルムからなる接着補強
層12A、12Bを介在させる。その際、エアバッグ1
の中心側(半径方向の内側)、つまりエアバッグ1の膨
張時に表裏の布2、3が分離して剥離する側の所定範囲
の一部に、高周波溶着絶縁層となる中間層として絶縁層
13を挟持せしめたものである。ここで、高周波溶着絶
縁層とは、紙、テフロンフィルムあるいはオレフィン樹
脂フィルム等である。これにより、図1(B)のよう
に、陽電極14Aと陰電極14Bとを矢印のように近接
させて高周波溶着等による熱溶着をすることによって、
高周波絶縁層13が挟持された範囲における接着補強層
12C、12D間での非溶着を除いて外周接合部4にお
ける各部材間を強固に接合することができる。As described above, the front cloth 2 and the back cloth of the airbag 1 in which the thermoplastic films 2U and 3U such as urethane are laminated on at least the joining surfaces of the front cloth 2 and the back cloth 3 constituting the bag-shaped airbag. 3 will be described by taking the outer peripheral joint portion 4 of the airbag 1 as an example. In the present embodiment, the positive electrode 14A and the negative electrode 14B, which are arranged substantially in parallel at an interval above and below, are connected. In between, thermoplastic film 2
U and 3U are opposed to each other, and the front and back cloths 2 and 3 are set to face each other. A material which can satisfy the same adhesive strength as the thermoplastic film 2U and 3U between the front and back cloths 2 and 3 Adhesion reinforcing layers 12A and 12B made of a thermoplastic film such as urethane are interposed. At that time, airbag 1
Is located on the center side (inside in the radial direction) of the airbag 1, that is, a part of a predetermined range on the side where the front and back cloths 2 and 3 are separated and peeled off when the airbag 1 is inflated. It is a thing which was pinched. Here, the high-frequency welding insulating layer is paper, a Teflon film, an olefin resin film, or the like. As a result, as shown in FIG. 1B, the positive electrode 14A and the negative electrode 14B are brought close to each other as shown by arrows, and are thermally welded by high-frequency welding or the like.
Except for the non-adhesion between the adhesive reinforcing layers 12C and 12D in the range where the high-frequency insulating layer 13 is sandwiched, the members at the outer peripheral joint 4 can be firmly joined.
【0013】この結果、図1(C)に示すように、外周
接合部4が熱溶着されたエアバッグ1がインフレータ5
からの高圧ガスの導入によって作動膨張する際に、互い
に分離する表裏布2、3によって接合面が剥離しようと
しても、接合面における接着補強層12Aと12Bとの
間の強固な溶着によってこれを許容せず、しかも絶縁層
の範囲の接着補強層12C、12Dは表裏布2、3側に
強固に溶着してその挙動を共にし、剥離方向が剪断方向
に変換された表布2と熱可塑性フィルム2Uとの間およ
び裏布3と熱可塑性フィルム3Uとの間の分離をも有効
に防止する。そして、前記熱可塑性フィルム2U、3U
をラミネートした各表裏布2、3、接着補強層12A、
12Bおよび絶縁層13は、平行に設置された電極14
A、14B間において層状に積層するのみでよく、外周
部が一度に溶着して容易に接合することができて、接合
装置自体も簡素な構造となる。なお、表裏布2、3に替
えてナイロンフィルム、ポリエステルフィルムを採用す
ることもできる。As a result, as shown in FIG. 1 (C), the airbag 1 having the outer peripheral joint portion 4 heat-sealed is attached to the inflator 5.
When the working surface expands due to the introduction of high-pressure gas from the surface, even if the joining surface is about to be separated by the front and back cloths 2 and 3, which are separated from each other, this is allowed by the strong welding between the adhesion reinforcing layers 12A and 12B at the joining surface. In addition, the adhesive reinforcing layers 12C and 12D in the range of the insulating layer are firmly welded to the front and back cloths 2 and 3 to have the same behavior, and the peeling direction is changed to the shearing direction and the thermoplastic film and the front cloth 2 are changed. Separation between 2U and between the back cloth 3 and the thermoplastic film 3U is also effectively prevented. And, the thermoplastic films 2U, 3U
Front and back cloths 2 and 3 laminated with each other, an adhesion reinforcing layer 12A,
12B and the insulating layer 13 are provided with electrodes 14 arranged in parallel.
Only the layers A and 14B need to be laminated in a layered manner, and the outer peripheral portion can be welded at a time and easily joined, so that the joining device itself has a simple structure. Note that a nylon film or a polyester film may be used instead of the front and back cloths 2 and 3.
【0014】図2は、本発明の第2実施の形態を示すも
ので、図2は図1におけるA部の断面拡大図である。前
記第1実施の形態のものの接着補強層12が2枚の層に
よって形成されていたのに対して、本実施の形態におけ
る接着補強層12は、エアバッグ1の膨張時に表地およ
び裏地としての表裏の布2、3が分離して剥離する側の
所定範囲が切込部15によって分離層12C、12Dに
形成されたほぼY字形断面のウレタン等の熱可塑性フィ
ルムからなるもので、前記Y字形断面における分離層1
2C、12D間に共押出成形等によって予めオレフィン
樹脂等の高周波溶着絶縁層13Aが形成されている。前
記接着補強層12は、共押出成形法等によって予め高周
波溶着絶縁層13Aが積層された形態でY字形断面のウ
レタン等の熱可塑性フィルムが連続して形成されるよう
にしてもよいし、Y字形断面のウレタン等の熱可塑性フ
ィルムに後から、紙、テフロンフィルムあるいはオレフ
ィン樹脂フィルム等の高周波溶着絶縁層13Aを積層固
着してもよい。かく構成すれば、高周波溶着作業時に絶
縁層を挟持する作業が省略でき、作業効率がより向上す
る。FIG. 2 shows a second embodiment of the present invention. FIG. 2 is an enlarged sectional view of a portion A in FIG. While the adhesive reinforcing layer 12 of the first embodiment is formed by two layers, the adhesive reinforcing layer 12 of the present embodiment is used as the outer and inner linings when the airbag 1 is inflated. A predetermined area on the side where the cloths 2 and 3 are separated and peeled off is made of a thermoplastic film such as urethane having a substantially Y-shaped cross section formed on the separation layers 12C and 12D by the cutouts 15, and the Y-shaped cross section is formed. Separation layer 1 in
A high frequency welding insulating layer 13A such as an olefin resin is formed in advance between 2C and 12D by coextrusion molding or the like. The adhesive reinforcing layer 12 may be formed by continuously forming a thermoplastic film such as urethane having a Y-shaped cross section in a form in which a high-frequency welding insulating layer 13A is previously laminated by a coextrusion molding method or the like. A high-frequency welding insulating layer 13A such as paper, a Teflon film or an olefin resin film may be laminated and fixed to a thermoplastic film such as urethane having a letter-shaped cross section later. With this configuration, the operation of sandwiching the insulating layer during the high frequency welding operation can be omitted, and the operation efficiency is further improved.
【0015】図3は、本発明の第3実施の形態を示すも
ので、図1におけるA部に相当するる拡大断面図であ
る。本実施の形態では、接着補強層12A、12Bとし
て、両面にウレタン等の熱可塑性フィルム12Uがラミ
ネートされた2層の基布からなることを特徴とするもの
である。これによって、前記第1の実施の形態と同様
に、外周接合部4が熱溶着されたエアバッグ1がインフ
レータ5からの高圧ガスの導入によって作動膨張する際
に、互いに分離する表裏布2、3によって接合面が剥離
しようとしても、これを許容せず、剥離方向が剪断方向
に変換された表布2と熱可塑性フィルム2Uとの間およ
び裏布3と熱可塑性フィルム3Uとの間の分離をも有効
に防止する。FIG. 3 shows a third embodiment of the present invention, and is an enlarged sectional view corresponding to a portion A in FIG. The present embodiment is characterized in that each of the adhesion reinforcing layers 12A and 12B is made of a two-layer base cloth having a thermoplastic film 12U such as urethane laminated on both sides. As a result, similarly to the first embodiment, when the airbag 1 to which the outer peripheral joint portion 4 is heat-welded is inflated by the introduction of high-pressure gas from the inflator 5, the front and back cloths 2, 3 which are separated from each other. Even if the bonding surface is to be peeled off, the peeling direction is not allowed, and the separation between the front cloth 2 and the thermoplastic film 2U and the separation between the back cloth 3 and the thermoplastic film 3U in which the peeling direction is changed to the shearing direction are performed. Also effectively prevent.
【0016】図4は、本発明の第4実施の形態を示すも
ので、図4(A)に示すように、一側に所定間隔にて多
数のスリットが切り込まれたテープ状体を円形につない
で形成されたウレタン等の熱可塑性フィルムあるいは両
面にウレタン等の熱可塑性フィルムがラミネートされた
基布を、図4(B)に示すように、ほぼエアバッグ外周
部の接合円に等しい大きさのリング状に形成したものを
2枚重合し、図4(C)に示すように、外周接合部4よ
りエアバッグ中心側の中間層に絶縁層13を介在させて
エアバッグの表布2と裏布3との間に配置して接合する
ものである。これによって、前記第1の実施の形態と同
様の効果を奏するものであるが、本実施の形態では、平
板でリング状の接着補強層が容易に得られるので、その
製造が低廉である。FIG. 4 shows a fourth embodiment of the present invention. As shown in FIG. 4A, a tape-like body having a large number of slits cut at predetermined intervals on one side is formed in a circular shape. As shown in FIG. 4 (B), a thermoplastic film such as urethane or a base fabric laminated with a thermoplastic film such as urethane on both sides is formed to have a size substantially equal to the joining circle of the outer peripheral portion of the airbag. As shown in FIG. 4 (C), two sheets formed in a ring shape are superimposed, and as shown in FIG. 4 (C), an insulating layer 13 is interposed between the outer peripheral joint 4 and the intermediate layer on the center side of the airbag. And the back cloth 3. As a result, the same effects as those of the first embodiment can be obtained. However, in the present embodiment, a flat and ring-shaped adhesive reinforcing layer can be easily obtained, so that its manufacture is inexpensive.
【0017】図5は、本発明の第5実施の形態を示すも
ので、袋状のエアバッグを構成する前記表地2および裏
地3として、布地に代えてウレタン等の熱可塑性フィル
ムを採用したものである。図5(A)に示すように、袋
状のエアバッグを構成するところの布地に代えたウレタ
ン等の熱可塑性フィルムからなる表地2と裏地3の少な
くとも接合面には、これら表地および裏地と同素材のウ
レタン等の熱可塑性フィルム2U、3Uがラミネートさ
れ、その外周接合部4のほぼ平行に上下に間隔を置いて
配置された陽電極14Aと陰電極14Bとの間に、前記
熱可塑性フィルム2U、3Uを対向させた状態にて表地
および裏地2、3を対向してセットし、これら表地およ
び裏地2、3の間に前記熱可塑性フィルム2U、3Uと
同じ程度の接着強度が満足できる素材のウレタン等の熱
可塑性フィルムからなる接着補強層4U、4Uを介在さ
せる。その際、前述した図1と同様に、エアバッグ1の
中心側の所定範囲の一部に、高周波溶着絶縁層となる中
間層として絶縁層13を挟持せしめる。次いで、陽電極
14Aと陰電極14Bとを矢印のように近接させて高周
波溶着等による熱溶着をすることによって、高周波絶縁
層13が挟持された範囲における接着補強層4A、4B
間での非溶着を除いて外周接合部4における各部材間を
強固に接合することができる。FIG. 5 shows a fifth embodiment of the present invention, in which a thermoplastic film such as urethane is used in place of the cloth as the outer material 2 and the lining 3 constituting the bag-shaped airbag. It is. As shown in FIG. 5 (A), at least the joining surface between the outer fabric 2 and the lining 3 made of a thermoplastic film such as urethane instead of the fabric constituting the bag-shaped airbag has the same shape as the outer fabric and the lining. A thermoplastic film 2U, 3U made of urethane or the like is laminated, and the thermoplastic film 2U is placed between a positive electrode 14A and a negative electrode 14B, which are arranged substantially in parallel with the outer peripheral joint portion 4 and vertically spaced apart from each other. The surface material and the linings 2 and 3 are set to face each other with the 3U facing each other, and a material which can satisfy the same adhesive strength as the thermoplastic film 2U and 3U between the surface materials and the linings 2 and 3 is used. Adhesion reinforcing layers 4U, 4U made of a thermoplastic film such as urethane are interposed. At this time, similarly to FIG. 1 described above, an insulating layer 13 is sandwiched as an intermediate layer to be a high-frequency welding insulating layer in a part of a predetermined range on the center side of the airbag 1. Then, the positive electrode 14A and the negative electrode 14B are brought close to each other as shown by arrows and heat-welded by high-frequency welding or the like, whereby the adhesive reinforcing layers 4A and 4B in the range where the high-frequency insulating layer 13 is sandwiched are provided.
The members at the outer peripheral joint portion 4 can be firmly joined except for non-welding between them.
【0018】この結果、図5(B)に示すように、外周
接合部4が熱溶着されたエアバッグ1がインフレータ5
からの高圧ガスの導入によって作動膨張する際に、互い
に分離する表地および裏地2、3によって接合面が剥離
しようとしても、接合面における接着補強層4Uと4U
との間の強固な溶着によってこれを許容せず、しかも絶
縁層の範囲の接着補強層4A、4Bは表地および裏地
2、3側に強固に溶着してその挙動を共にし、剥離方向
が剪断方向に変換された表地2と熱可塑性フィルム2U
との間および裏地3と熱可塑性フィルム3Uとの間の分
離をも有効に防止する。しかも、本実施の形態では、表
地および裏地2、3およびこれらにラミネートされたフ
ィルム4U、4Uは同素材のウレタン等の熱可塑性フィ
ルムから構成されており、それらの間の熱溶着性はきわ
めて高く、剥離の虞れは全くない。そして、前記熱可塑
性フィルム2U、3Uをラミネートした各表地および裏
地2、3、接着補強層4U、4Uおよび絶縁層13は、
平行に設置された電極14A、14B間において層状に
積層するのみでよく、外周部が一度に溶着して容易に接
合することができて、接合装置自体も簡素な構造とな
る。なお、表地および裏地フィルムとしては、ウレタン
等の熱可塑性エラストマーの他に、エステル系熱可塑性
エラストマー、アミド系熱可塑性エラストマー等も採用
され得る。ポリアミド、ポリエステル、ポリカーボネー
ト、ポリイミド等の熱可塑性樹脂も好んで用いられる。As a result, as shown in FIG. 5 (B), the airbag 1 with the outer peripheral joint portion 4 heat-welded is attached to the inflator 5.
When the joint expands due to the outer material and the linings 2 and 3 that are separated from each other during the operation expansion due to the introduction of the high-pressure gas from the surface, the adhesion reinforcing layers 4U and 4U at the joint surface
The adhesion reinforcement layers 4A and 4B in the area of the insulating layer are firmly welded to the surface material and the linings 2 and 3 so as to have the same behavior, and the peeling direction is sheared. Outer fabric 2 and thermoplastic film 2U converted in direction
And between the backing 3 and the thermoplastic film 3U are also effectively prevented. Moreover, in the present embodiment, the outer material and the linings 2, 3 and the films 4U, 4U laminated thereon are made of a thermoplastic film such as urethane of the same material, and the heat welding property between them is extremely high. There is no fear of peeling. Each of the outer and lining materials 2 and 3 laminated with the thermoplastic films 2U and 3U, the adhesive reinforcing layers 4U and 4U, and the insulating layer 13
It is only necessary to laminate the electrodes 14A and 14B in a layered manner between the electrodes 14A and 14B. The outer peripheral portions can be welded at a time and easily joined, and the joining device itself has a simple structure. In addition, an ester thermoplastic elastomer, an amide thermoplastic elastomer, or the like may be used as the surface and backing film, in addition to a thermoplastic elastomer such as urethane. Thermoplastic resins such as polyamide, polyester, polycarbonate, and polyimide are also preferably used.
【0019】図6は、本発明の第6実施の形態を示すも
ので、本実施の形態は、前記第5実施の形態のものにお
ける表地および裏地とそれらにラミネートされるウレタ
ン等の熱可塑性フィルム2Uおよび3Uとをそれぞれ一
体に形成して表地2および裏地3としたもの、つまり、
図6(A)に示すように、袋状のエアバッグを構成する
ウレタン等の熱可塑性フィルムからなる表地2と裏地3
の外周接合部4の接合面間に前記表裏のフィルム2、3
と同質のウレタン等の熱可塑性フィルムからなる接着補
強層4U、4Uを接合材として対向させた状態にて配置
し、これら表フィルム2と裏フィルム3の外周接合部4
および接着補強層4U、4Uを、ほぼ平行に上下に間隔
を置いて配置された陽電極14Aと陰電極14Bとの間
にセットし、エアバッグ1の中心側の所定範囲の一部
に、高周波溶着絶縁層となる中間層として絶縁層13を
挟持せしめたものである。これにより、図6(A)のよ
うに、陽電極14Aと陰電極14Bとを矢印のように近
接させて高周波溶着等による熱溶着をすることによっ
て、高周波絶縁層13が挟持された範囲における接着補
強層としての熱可塑性フィルム4A、4B間での非溶着
を除いて外周接合部4における各部材間を強固に接合す
ることができる。FIG. 6 shows a sixth embodiment of the present invention, which is the same as the fifth embodiment, except that the surface and lining and the thermoplastic film such as urethane laminated on them are laminated. 2U and 3U are integrally formed to form the outer material 2 and the inner material 3, that is,
As shown in FIG. 6A, a dress material 2 and a lining material 3 made of a thermoplastic film such as urethane constituting a bag-shaped airbag.
The front and back films 2 and 3 between the joining surfaces of the outer peripheral joining portion 4
Adhesive reinforcing layers 4U, 4U made of a thermoplastic film of urethane or the like of the same quality as above are arranged in a state where they are opposed to each other as a bonding material, and an outer peripheral bonding portion 4 of these front film 2 and back film 3 is arranged.
The adhesive reinforcing layers 4U and 4U are set between the positive electrode 14A and the negative electrode 14B which are arranged substantially in parallel at intervals above and below, and a part of a predetermined range on the center side of the airbag 1 An insulating layer 13 is sandwiched as an intermediate layer serving as a welding insulating layer. As a result, as shown in FIG. 6A, the positive electrode 14A and the negative electrode 14B are brought close to each other as shown by arrows and heat-welded by high-frequency welding or the like, thereby bonding the high-frequency insulating layer 13 in the sandwiched area. Except for non-welding between the thermoplastic films 4A and 4B as the reinforcing layers, the members at the outer peripheral joint 4 can be firmly joined.
【0020】この結果、図6(B)に示すように、外周
接合部4が熱溶着されたエアバッグがインフレータから
の高圧ガスの導入によって作動膨張する際に、互いに分
離する表裏のフィルム2、3によって接合面が剥離しよ
うとしても、接合面における接着補強層としての熱可塑
性フィルム4Uと4Uとの間の強固な溶着によってこれ
を許容せず、しかも絶縁層の範囲の熱可塑性フィルム4
A、4Bは表裏フィルム2、3側に強固に溶着してその
挙動を共にし、剥離方向が剪断方向に変換された表フィ
ルム2と熱可塑性フィルム4Uとの間および裏フィルム
3と熱可塑性フィルム4Uとの間の剪断方向の強力な耐
力によって接着補強層である接合材としての熱可塑性フ
ィルム4U、4U間の剥離強度が増大することになる。As a result, as shown in FIG. 6 (B), when the airbag having the outer peripheral joint portion 4 thermally welded is operatively inflated by the introduction of the high pressure gas from the inflator, the films 2 on the front and back sides are separated from each other. 3. Even if the joint surface is peeled off by 3, the strong adhesion between the thermoplastic films 4U and 4U as the adhesion reinforcing layer on the joint surface does not allow this, and the thermoplastic film 4 in the range of the insulating layer is not allowed.
A and 4B are firmly welded to the front and back films 2 and 3 and have the same behavior, and between the front film 2 and the thermoplastic film 4U whose peeling direction has been changed to the shearing direction, and between the back film 3 and the thermoplastic film. The peel strength between the thermoplastic films 4U and 4U as the bonding material, which is the adhesive reinforcing layer, is increased by the strong proof stress in the shear direction between 4U and 4U.
【0021】以上本発明の各実施の形態について述べて
きたが、本発明の趣旨の範囲内において、エアバッグに
おける表地および裏地の接合形態、それらの材質、ラミ
ネートされる樹脂層の材質、ラミネートする方法、絶縁
層の材質、接着補強層の材質、形状、絶縁層の材質、形
状、積層方法、インフレータ用開口およびベント用開口
の補強布の積層形態等については適宜採用できるもので
ある。Although the respective embodiments of the present invention have been described above, within the scope of the spirit of the present invention, the joining forms of the outer material and the inner material of the airbag, the materials thereof, the material of the resin layer to be laminated, and the lamination. The method, the material of the insulating layer, the material and shape of the adhesion reinforcing layer, the material and shape of the insulating layer, the laminating method, the laminating form of the reinforcing cloth for the inflator opening and the vent opening, and the like can be appropriately adopted.
【0022】[0022]
【発明の効果】以上詳細に述べてきたように、本発明で
は、袋状のエアバッグを構成する表地と裏地の外周接合
部の少なくとも接合面にウレタン等の熱可塑性フィルム
がラミネートされたエアバッグ表地および裏地同士の前
記接合面における熱可塑性フィルム間に、前記外周接合
部よりエアバッグ中心側の中間層に高周波溶着絶縁層等
を形成したウレタン等の熱可塑性フィルムからなる接着
補強層を介在させて高周波溶着によりエアバッグ表地お
よび裏地同士を電極間において高周波溶着等の熱溶着に
て接合したので、前記高周波溶着絶縁層が形成された範
囲では熱可塑性フィルムと接着補強層とは強固に溶着す
るものの、接着補強層同士は溶着することなく分離さ
れ、また、前記絶縁層を除いた範囲では熱可塑性フィル
ムおよび接着補強層の各層が一体強固に溶着されるの
で、接合部が熱溶着されたエアバッグがインフレータか
らの高圧ガスの導入によって作動膨張する際に、互いに
分離する表地および裏地によって接合面が剥離しようと
しても、接合面における接着補強層同士の強固な溶着に
よってこれを許容せず、しかも絶縁層の範囲の各接着補
強層は表地および裏地側に強固に溶着してその挙動を共
にし、剥離方向が剪断方向に変換された表地と熱可塑性
フィルムの間および裏地と熱可塑性フィルムとの間の分
離をも有効に防止することができる。また、表地および
裏地およびこれらにラミネートされるフィルムを同素材
のウレタン等の熱可塑性フィルムから構成すれば、それ
らの間の熱溶着性はさらに高く、剥離の虞れは全くなく
なる。そして、前記熱可塑性フィルムをラミネートした
各表地および裏地、接着補強層および絶縁層は、平行に
設置された電極間において層状に積層するのみでよく、
電極の直線的移動のみで外周部が一度に溶着して容易に
接合することができて、接合装置自体も簡素な構造とな
るものである。As described in detail above, according to the present invention, an airbag in which a thermoplastic film such as urethane is laminated on at least the joint surface of the outer peripheral joint portion of the outer material and the lining constituting the bag-shaped airbag. Between the thermoplastic films on the joint surface between the outer material and the lining, an adhesive reinforcing layer made of a thermoplastic film such as urethane having a high frequency welding insulating layer formed in the intermediate layer on the airbag center side from the outer peripheral joint is interposed. Since the air bag surface and lining are joined by heat welding such as high frequency welding between the electrodes by high frequency welding, the thermoplastic film and the adhesive reinforcing layer are firmly welded in the range where the high frequency welding insulating layer is formed. However, the adhesive reinforcing layers are separated without welding, and the thermoplastic film and the adhesive reinforcing layer are provided in a range excluding the insulating layer. Since the layers are integrally and firmly welded together, even if the joining surface is peeled off by the front and backing layers that separate from each other when the airbag, whose joints are heat-welded, is inflated by the introduction of high-pressure gas from the inflator. This is not allowed due to the strong welding of the adhesion reinforcing layers on the surface, and each adhesion reinforcing layer in the range of the insulating layer firmly adheres to the outer and lining sides and behaves together, and the peeling direction is in the shearing direction. Separation between the converted surface material and the thermoplastic film and between the backing material and the thermoplastic film can also be effectively prevented. Further, if the outer material and the lining and the film laminated thereon are made of a thermoplastic film such as urethane of the same material, the heat welding property between them is even higher, and there is no fear of peeling. Then, each surface and lining laminated with the thermoplastic film, the adhesion reinforcing layer and the insulating layer may be laminated only in layers between the electrodes arranged in parallel,
The outer peripheral portion can be welded at once and can be easily joined only by linearly moving the electrode, and the joining device itself has a simple structure.
【図1】本発明によるエアバッグの第1実施の形態を示
すもので、図1(A)はエアバッグ装置の全体図、図1
(B)(C)は要部の断面拡大図である。1 shows a first embodiment of an airbag according to the present invention, and FIG. 1 (A) is an overall view of an airbag device, FIG.
(B) and (C) are enlarged cross-sectional views of main parts.
【図2】本発明によるエアバッグの第2実施の形態を示
すもので、図1(A)の要部であるA部に相当する断面
拡大図である。FIG. 2 is an enlarged cross-sectional view showing a second embodiment of the airbag according to the present invention and corresponding to a portion A which is a main part of FIG. 1 (A).
【図3】本発明によるエアバッグの第3実施の形態を示
すものである。FIG. 3 shows a third embodiment of the airbag according to the present invention.
【図4】本発明によるエアバッグの第4実施の形態を示
すものである。FIG. 4 shows a fourth embodiment of the airbag according to the present invention.
【図5】本発明によるエアバッグの第5実施の形態を示
すものである。FIG. 5 shows a fifth embodiment of the airbag according to the present invention.
【図6】本発明によるエアバッグの第6実施の形態を示
すものである。FIG. 6 shows an airbag according to a sixth embodiment of the present invention.
【図7】エアバッグの第1の従来例を示す図である。FIG. 7 is a view showing a first conventional example of an airbag.
【図8】エアバッグの第2の従来例を示す要部拡大図で
ある。FIG. 8 is an enlarged view of a main part showing a second conventional example of an airbag.
1 エアバッグ 2 表地 2U 熱可塑性フィルム 3 裏地 3U 熱可塑性フィルム 4 外周接合部 4U 接着補強層 5 インフレータ 6 インフレータ用開口 7 ベント用開口 8 補強布(インフレータ用開口) 9 補強布(ベント用開口) 10 ベースプレート 11 リテーナ 12 接着補強層 12A 接着補強層 12B 接着補強層 12C 分離層 12D 分離層 13 高周波溶着絶縁層 13A 絶縁層 14 電極 15 切込部 DESCRIPTION OF SYMBOLS 1 Air bag 2 Outer fabric 2U Thermoplastic film 3 Lining 3U Thermoplastic film 4 Perimeter joint 4U Adhesive reinforcement layer 5 Inflator 6 Inflator opening 7 Vent opening 8 Reinforcing cloth (Inflator opening) 9 Reinforcing cloth (Vent opening) 10 Base plate 11 Retainer 12 Adhesion reinforcement layer 12A Adhesion reinforcement layer 12B Adhesion reinforcement layer 12C Separation layer 12D Separation layer 13 High frequency welding insulation layer 13A Insulation layer 14 Electrode 15 Cut part
Claims (6)
の外周接合部の少なくとも接合面にウレタン等の熱可塑
性フィルムがラミネートされたエアバッグ表地および裏
地同士の前記接合面における熱可塑性フィルム間に、前
記外周接合部よりエアバッグ中心側の中間層に高周波溶
着絶縁層を形成したウレタン等の熱可塑性フィルムから
なる接着補強層を介在させて前記接合面を高周波溶着等
の熱溶着によりエアバッグ表地および裏地同士を接合し
たことを特徴とするエアバッグ。1. An air bag outer material in which a thermoplastic film such as urethane is laminated on at least the joint surface of the outer peripheral joints of the outer material and the lining constituting a bag-shaped airbag, and between the thermoplastic films on the joint surface of the linings. In addition, an adhesive reinforcing layer made of a thermoplastic film such as urethane having a high frequency welding insulating layer formed on an intermediate layer closer to the center of the airbag than the outer peripheral joint portion is interposed, and the joint surface is thermally welded by high frequency welding or the like to the airbag. An airbag characterized by joining the outer material and the lining material together.
塑性フィルムからなることを特徴とする請求項1に記載
のエアバッグ。2. The airbag according to claim 1, wherein the outer material and the inner material are made of a thermoplastic film such as urethane.
トされるウレタン等の熱可塑性フィルムとがそれぞれ一
体に形成されたことを特徴とする請求項2に記載のエア
バッグ。3. The airbag according to claim 2, wherein the outer material, the inner material, and a thermoplastic film such as urethane laminated on the outer material and the inner material are integrally formed.
可塑性フィルムがラミネートされた2層の基布からなる
ことを特徴とする請求項1ないし3のいずれかに記載の
エアバッグ。4. The airbag according to any one of claims 1 to 3, wherein the adhesion reinforcing layer is made of a two-layer base cloth having thermoplastic films such as urethane laminated on both sides thereof.
タン等の熱可塑性フィルムからなり、前記Y字形断面に
おける分離層間に高周波溶着絶縁層を形成したことを特
徴とする請求項1ないし4のいずれかに記載のエアバッ
グ。5. The adhesion reinforcing layer is made of a thermoplastic film such as urethane having a substantially Y-shaped cross section, and a high frequency welding insulating layer is formed between the separation layers in the Y-shaped cross section. The airbag according to any one.
スリットが切り込まれたテープ状体を円形につないで形
成されたことを特徴とする請求項1ないし5のいずれか
に記載のエアバッグ。6. The adhesive reinforcing layer is formed by connecting tape-shaped bodies, each of which has slits cut into one side at predetermined intervals, in a circular shape. Airbag.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8148848A JPH09119066A (en) | 1995-08-24 | 1996-06-11 | Air bag |
JP14743997A JP3665941B2 (en) | 1996-06-11 | 1997-06-05 | Airbag |
US08/872,153 US5909895A (en) | 1996-06-11 | 1997-06-10 | Thermoplastic resin film air bag |
DE19724672A DE19724672A1 (en) | 1996-06-11 | 1997-06-11 | Airbags |
GB9712188A GB2314051B (en) | 1996-06-11 | 1997-06-11 | Air bags |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21561295 | 1995-08-24 | ||
JP7-215612 | 1995-08-24 | ||
JP8148848A JPH09119066A (en) | 1995-08-24 | 1996-06-11 | Air bag |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09119066A true JPH09119066A (en) | 1997-05-06 |
Family
ID=26478911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8148848A Pending JPH09119066A (en) | 1995-08-24 | 1996-06-11 | Air bag |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09119066A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006123696A (en) * | 2004-10-28 | 2006-05-18 | Takata Corp | Air bag and air bag device |
JP2011152913A (en) * | 2010-01-27 | 2011-08-11 | Tk Holdings Inc | Airbag |
-
1996
- 1996-06-11 JP JP8148848A patent/JPH09119066A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006123696A (en) * | 2004-10-28 | 2006-05-18 | Takata Corp | Air bag and air bag device |
JP2011152913A (en) * | 2010-01-27 | 2011-08-11 | Tk Holdings Inc | Airbag |
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