JP3967957B2 - Manufacturing method of fiber reinforced resin strands - Google Patents

Manufacturing method of fiber reinforced resin strands Download PDF

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JP3967957B2
JP3967957B2 JP2002127697A JP2002127697A JP3967957B2 JP 3967957 B2 JP3967957 B2 JP 3967957B2 JP 2002127697 A JP2002127697 A JP 2002127697A JP 2002127697 A JP2002127697 A JP 2002127697A JP 3967957 B2 JP3967957 B2 JP 3967957B2
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fiber
resin
reinforced resin
stranded wire
wire
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JP2003328284A (en
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裕士 玉木
伸二 今村
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日鉄コンポジット株式会社
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D07B1/04—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics with a core of fibres or filaments arranged parallel to the centre line
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D07B1/025—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics comprising high modulus, or high tenacity, polymer filaments or fibres, e.g. liquid-crystal polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/165—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber inlay
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2042—Strands characterised by a coating
    • D07B2201/2044—Strands characterised by a coating comprising polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/209—Jackets or coverings comprising braided structures
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/20—Organic high polymers
    • D07B2205/2046—Polyamides, e.g. nylons
    • D07B2205/205—Aramides
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/20—Organic high polymers
    • D07B2205/2096—Poly-p-phenylenebenzo-bisoxazole [PBO]
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3003—Glass
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3007—Carbon
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3017—Silicon carbides
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2015—Construction industries
    • D07B2501/2023—Concrete enforcements
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2015—Construction industries
    • D07B2501/203—Bridges

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  • Reinforcement Elements For Buildings (AREA)
  • Ropes Or Cables (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、主として、土木、建築、橋梁などの分野において、コンクリート構造物及び鋼構造物などの構造物の補強材や緊張材、地盤補強材、吊り橋等の橋梁のメインケーブルなどとして好適に使用し得る、炭素繊維などの強化繊維を用いた繊維強化樹脂製撚線の製造法に関するものである。
【０００２】
【従来の技術】
図１に示すように、繊維強化樹脂製撚線１は、例えば高強度の炭素繊維等とされる強化繊維（フィラメント）ｆと熱硬化性樹脂を複合化した素線２をスロープ状に撚って成形したストランドで、高強度、高耐食性の特徴を有しており、コンクリート構造物の塩害対策や補強対策に適した材料である。また、比重が鋼材の１／５程度と軽量であることから、省力化施工を可能とする材料であり、コンクリート構造物の緊張材や補強材として様々な工事分野にて好適に使用することができる。
【０００３】
従来、繊維強化樹脂製撚線１は、先ず、図２に示すように、多数本の炭素繊維などの強化繊維ｆに樹脂を含浸させて素線２を作製し、この素線２を複数本撚り合わせることにより作製される。繊維強化樹脂製撚線１の従来の製造法の一例を図６に示す。
【０００４】
クリールスタンドに取り付けられたクリール２１から解じょされた多数本の強化繊維ｆは、樹脂含浸工程へと送給され、樹脂が収容された含浸槽２２を通すことにより樹脂が含浸される。この樹脂が含浸された強化繊維ｆは、集合されて繊維芯３とされ、収束工程へと送られる。収束工程では、図示するように、バラケ止めのために外装４として、ワインダー２３にて繊維芯３の回りにテープ４ａが巻き付けられて素線２が作製される。素線２は、ドラムワインダー２４を設けた巻取り工程にてボビンＢ１に巻き取られる。この状態で、素線２の樹脂は未だ硬化されてはいない。
【０００５】
次いで、未硬化状態の素線２を撚線製造工程へと送り、多数本の素線２が撚掛け工程にて撚られ、次いで、絞りダイス２５にて所定の径を持った撚線１へと賦形される。この賦形された未硬化撚線１は、硬化工程へと送られて、加熱装置２６にて所定の温度、例えば２００℃程度に加熱されて硬化される。
【０００６】
このようにして作製された繊維強化樹脂製撚線１は、巻取り工程にて巻取機２７に巻き取られるか、又は、繊維強化樹脂製撚線１は、定尺切断工程にて、切断機２８にて所定の長さに切断される。
【０００７】
【発明が解決しようとする課題】
しかしながら、硬化した繊維強化樹脂製撚線１は、柔軟性に欠け、巻き取ることが極めて困難で、必然的にボビン直径は大きなものとなる。また、繊維強化樹脂製撚線１がトラックなどにて輸送し得る長さの場合には、ボビンＢ２などに巻き取ることなく、工場にて所定長さに切断して輸送されるが、ボビンに巻き付けたものに比べて長さが長くハンドリングし難いことが問題であった。
【０００８】
このように、従来の繊維強化樹脂製撚線１は、ボビンへの巻き取り性、延いては、輸送上の問題を有していた。
【０００９】
また、一般に、繊維強化樹脂製撚線１の端末は、樹脂又は樹脂モルタルなどを用いて固定金具などに一体的に定着することが必要とされる。
【００１０】
ところが、硬化した繊維強化樹脂製撚線１は、表面が硬化した樹脂により滑らかな状態となっており、このままでは樹脂又は樹脂モルタルに対する付着力が弱い。
【００１１】
そこで、撚線のままでは接着表面積が小さいので、分線して多数本の素線とする。この際、素線の回りの表面が凹凸を有した粗表面となると共に、多数本の素線とすることにより接着表面積を大きくすることができ、樹脂等に対する付着力が向上する。
【００１２】
通常、繊維強化樹脂製撚線端末の処理は、例えば２００℃に加熱して繊維強化樹脂製撚線表面の樹脂を軟化させ、その後、図７に示すように、繊維強化樹脂製撚線１の端末部分を加圧しながら解すことにより、撚線の端末部分を素線単位で解線（分線）することにより行われている。この分線化作業により、端末部分には凹凸が付与され、粗表面となり、定着樹脂などに対する付着力が増大する。
【００１３】
しかしながら、このような分線作業は、煩雑な作業を必要とし、多くの時間と、費用が余儀なくされる。
【００１４】
また、従来の撚線は、プレストレストコンクリートを作製するような場合や、鉄筋などの代替品としてコンクリートに埋め込む場合には、表面が滑らかなため付着力が小さく、定着長を長く取る必要があったり、抜け出し易かったりする問題があった。
【００１５】
従って、本発明の目的は、巻取機への巻き取り性が向上し、端末部分の分線化作業が容易であり、また、コンクリート付着力の良い繊維強化樹脂製撚線の製造法を提供することである。
【００１６】
【課題を解決するための手段】
上記目的は本発明に係る繊維強化樹脂製撚線の製造法にて達成される。要約すれば、本発明によると、
（ａ）連続して送給される、強化繊維と熱硬化性樹脂を複合化して形成した未だ硬化されていない複数本の素線を、撚り合わせて、絞りダイスにて所定形状の撚線に成形する工程と、
（ｂ）所定形状に成形された撚線を加熱し硬化する工程と、
（ｃ）硬化した撚線を、分線手段にて素線が互いに分離するように分線し、そして、再度撚り合わせる工程と、
を有し、前記分線手段は、各前記素線が送通される孔を有し、回転することにより各前記素線を撚り合わせるダイスであることを特徴とする繊維強化樹脂製撚線の製造法が提供される。
【００１７】
本発明の一実施態様によると、強化繊維は、炭素繊維、ガラス繊維、アラミド繊維、ＰＢＯ繊維、又は、炭化珪素繊維である。
【００１８】
本発明の他の実施態様によると、前記熱硬化性樹脂は、ビニルエステル樹脂、エポキシ樹脂、又は不飽和ポリエステル樹脂である。
【００２１】
【発明の実施の形態】
以下、本発明に係る繊維強化樹脂製撚線の製造法を図面に則して更に詳しく説明する。
【００２２】
本発明の繊維強化樹脂製撚線は、図１及び図２を参照して説明した従来の繊維強化樹脂製撚線１と同様の構成とされる。ただ、本発明の繊維強化樹脂製撚線１は、硬化後において、全長にわたって、分線されている点で相違する。
【００２３】
つまり、本発明の繊維強化樹脂製撚線１は、図１に示すように、素線２が撚り合わせて形成されているが、各素線２は互いに分離された状態とされる。
【００２４】
従って、本発明の繊維強化樹脂製撚線１は、従来の、各素線２が樹脂にて一体に硬化された繊維強化樹脂製撚線に比較すると、柔軟性が極めて高く、ボビンなどに巻き取ることが極めて容易である。
【００２５】
また、本発明の繊維強化樹脂製撚線１の表面は、素線が互いに分離しており、そのために撚線の表面は極めて粗の状態にある。従って、本発明の繊維強化樹脂製撚線１では、その端末部分を固定金具に定着するに際して、従来の加熱による繊維強化樹脂製撚線表面の樹脂の除去及び撚線解し作業などの特別な分線化作業を必要とせず、簡単に分線できるので、そのまま、固定金具に樹脂又は樹脂モルタルで定着することができ、作業時間の短縮と、作業コストの低減を図ることができる。
【００２６】
本発明者らの研究実験の結果によると、樹脂又は樹脂モルタルに対する付着力は、従来と同様の結果を得ることができた。また、コンクリート付着強度については、従来のものの２〜３倍の大きい値を得た。
【００２７】
また、本発明の繊維強化樹脂製撚線１は、全長にわたって素線２が互いに分離しているにも拘わらず、繊維強化樹脂製撚線自体の機械的特性、即ち、引張強度、弾性係数は、従来の繊維強化樹脂製撚線と同等であることが確認された。
【００２８】
本発明の繊維強化樹脂製撚線１を構成する素線２は、従来と同様に、多数本の炭素繊維などの強化繊維ｆに樹脂を含浸させて作製される。
【００２９】
強化繊維としては、炭素繊維に限定されるものではなく、その他に、ガラス繊維、アラミド繊維、ＰＢＯ繊維、炭化珪素繊維などが使用可能である。又、樹脂としては、エポキシ樹脂又はビニルエステル樹脂、更には不飽和ポリエステルのような熱硬化性樹脂が好適に使用される。エポキシ樹脂としては、主剤（ビスフェノールＡ型エポキシ樹脂）と硬化剤（アミン系硬化剤）とを重量比で１００：２４にて混合したものを使用し得る。また、ビニルエステル樹脂としては、主剤（不飽和ポリエステル樹脂）と硬化剤（メチルエチルケトンパーオキサイド）とを重量比で１００：１にて混合したものを使用し得る。この時の、強化繊維と樹脂の比は、体積％で、４０〜８０とされ、好ましくは、５０〜７０とされる。
【００３０】
又、素線２のバラケ止めのために繊維芯３の周りを被覆する外装４としては、ポリエステル製のテープ４ａが好適に使用されるが、その他に、網状体のもの、フィルム状のものなど、当業者には周知のものを使用することができる。
【００３１】
また、本実施例では、素線２の数は７本であるとして説明したが、これに限定されるものではなく、例えば、表１に示すように、種々の構成が可能である。表１には、強化繊維として炭素繊維を使用した本発明の繊維強化樹脂製撚線１の種々の形態と、そのときの機械的特性を示す。
【００３２】
【表１】

Figure 0003967957
【００３３】
次に、本発明の繊維強化樹脂製撚線１の製造法について説明する。
【００３４】
図３に、本発明の繊維強化樹脂製撚線１の製造法の一実施例を示す。本実施例の製造法は、図６を参照して説明した従来の繊維強化樹脂製撚線の製造法と同様とされ、ただ、硬化工程において、加熱装置２６内に分線手段１００が配置され、硬化した撚線を分線（解線）する点においてのみ相違している。従って、同じ構成及び作用をなす工程、装置、部材等には同じ参照番号を付し、詳しい説明は省略し、以下には、本実施例の特徴とする硬化工程について説明する。
【００３５】
従来と同様に、解じょ工程、樹脂含浸工程、収束工程、巻き取り工程、を介して素線２が作製される。
【００３６】
素線２は、未硬化状態で撚線製造工程へと送り、多数本の素線２が撚掛け工程にて撚られ、次いで、絞りダイス２５にて所定の径を持った撚線１へと賦形される。この賦形された未硬化撚線１は、硬化工程へと送られて、加熱装置２６にて所定の温度、例えば２００℃程度に加熱されて硬化される。
【００３７】
本実施例では、加熱装置２６内に分線手段１００が配置される。分線手段１００は、加熱装置２６にて、例えば、２００℃に加熱されることにより硬化した繊維強化樹脂製撚線１を、各素線２が互いに分離するように分線化する作用をなす。
【００３８】
分線手段１００は、本実施例によると、図４に示すように、加熱装置２６の内側に取り付ける円筒状の基台１０１と、基台１０１の内側に軸受１０２を介して取り付けられた分線ダイス１０３とを有する。
【００３９】
分線ダイス１０３は、図５をも参照するとより良く理解されるように、中心部に円錐台形状のガイド部１０４が形成されており、ガイド部１０４の中心及びその周辺に、繊維強化樹脂製撚線１の素線２が通過するに適した孔１０５が、素線２の数だけ、本実施例では繊維強化樹脂製撚線１が７本の素線２にて形成されているために、７個形成されている。各孔１０５は、互いに離隔して形成されている。
【００４０】
従って、加熱装置２６内へと連続して送給され、加熱装置２６にて加熱されることにより硬化した繊維強化樹脂製撚線１は、各素線２が分線ダイス１０３の孔１０５に通され、そして、加熱装置２６から送出されて、巻取機２７にて巻き取られる。分線ダイス１０３は、送給される撚線１と共に回転しながら、加熱装置２６にて一体に加熱硬化された繊維強化樹脂製撚線１を、各素線２が互いに分離するように分線化すると共に、再度撚り合わせる。従って、加熱装置２６から送出される繊維強化樹脂製撚線１は、その全長にわたって素線２が分離した撚線とされる。
【００４１】
本実施例によれば、分線ダイス１０３などとされる分線手段１００を用いることにより、極めて効率よく、連続して本発明の繊維強化樹脂製撚線１を製造することができる。
【００４２】
このようにして作製された繊維強化樹脂製撚線１は、巻き取り性が向上し、巻取り工程における巻取機２７での巻き取り作業が極めて容易とされる。又、従来に比べると、ボビンＢ２もより小径のものを使用することが可能となり、運搬性が飛躍的に向上する。
【００４４】
【発明の効果】
以上説明したように、本発明の製造法によれば、分線ダイスとされる分線手段を用いることにより、極めて効率よく、連続して繊維強化樹脂製撚線を製造することができる。
【図面の簡単な説明】
【図１】本発明に係る繊維強化樹脂製撚線の一実施例を説明するための斜視図である。
【図２】素線の一実施例を示す斜視図である。
【図３】本発明に係る繊維強化樹脂製撚線の製造法の一実施例を説明するための工程を示す図である。
【図４】分線手段の一実施例を示す断面図である。
【図５】分線手段の分線ダイスの正面図である。
【図６】従来の繊維強化樹脂製撚線の製造法を説明するための工程を示す図である。
【図７】繊維強化樹脂製撚線の分線された端末部分を示す図である。
【符号の説明】
１ 繊維強化樹脂製撚線
２ 素線
３ 繊維芯
４ 外装
２１ クリール
２２ 含浸槽
２３ ワインダー
２４ ドラムワインダー
２５ 絞りダイス
２６ 加熱装置
２７ 巻取機
２８ 切断機[0001]
BACKGROUND OF THE INVENTION
The present invention is mainly suitable for use in the fields of civil engineering, architecture, bridges, etc., as reinforcing materials for structures such as concrete structures and steel structures, tension materials, ground reinforcing materials, main cables for bridges such as suspension bridges, etc. The present invention relates to a method for producing a fiber-reinforced resin stranded wire using reinforcing fibers such as carbon fibers.
[0002]
[Prior art]
As shown in FIG. 1, a fiber reinforced resin stranded wire 1 is formed by twisting, for example, a strand 2 in which a reinforcing fiber (filament) f, which is a high-strength carbon fiber or the like, and a thermosetting resin are combined, in a slope shape. This is a strand that has high strength and high corrosion resistance, and is a material suitable for measures against salt damage and reinforcement of concrete structures. In addition, since the specific gravity is as light as 1/5 that of steel, it is a material that enables labor-saving construction, and can be suitably used in various construction fields as a tension material and reinforcement for concrete structures. it can.
[0003]
2. Description of the Related Art Conventionally, a fiber-reinforced resin stranded wire 1 is produced by first impregnating a resin into a large number of reinforcing fibers f such as carbon fibers as shown in FIG. It is produced by twisting together. An example of the conventional manufacturing method of the fiber reinforced resin stranded wire 1 is shown in FIG.
[0004]
A large number of reinforcing fibers f unraveled from the creel 21 attached to the creel stand are fed to the resin impregnation step and impregnated with the resin by passing through the impregnation tank 22 containing the resin. The reinforcing fibers f impregnated with this resin are aggregated to form a fiber core 3 and sent to the convergence step. In the converging step, as shown in the drawing, the tape 4a is wound around the fiber core 3 by the winder 23 as the exterior 4 for preventing the breakage, and the strand 2 is produced. The element wire 2 is wound around the bobbin B1 in a winding process in which the drum winder 24 is provided. In this state, the resin of the strand 2 is not yet cured.
[0005]
Next, the uncured strand 2 is sent to the stranded wire manufacturing process, a large number of strands 2 are twisted in the twisting step, and then to the stranded wire 1 having a predetermined diameter with the drawing die 25. And shaped. The shaped uncured stranded wire 1 is sent to a curing step, and is heated and cured by a heating device 26 to a predetermined temperature, for example, about 200 ° C.
[0006]
The fiber reinforced resin stranded wire 1 thus produced is wound around the winder 27 in the winding step, or the fiber reinforced resin stranded wire 1 is cut in the regular cutting step. The machine 28 is cut into a predetermined length.
[0007]
[Problems to be solved by the invention]
However, the cured fiber reinforced resin stranded wire 1 lacks flexibility and is extremely difficult to wind, and inevitably has a large bobbin diameter. In addition, when the fiber reinforced resin stranded wire 1 is of a length that can be transported by a truck or the like, it is cut into a predetermined length and transported at a factory without being wound around the bobbin B2 or the like. The problem was that it was long and difficult to handle compared to the wound one.
[0008]
As described above, the conventional fiber-reinforced resin stranded wire 1 has a problem in terms of winding property to a bobbin, and further, transportation.
[0009]
In general, the end of the fiber reinforced resin stranded wire 1 is required to be integrally fixed to a fixing bracket or the like using resin or resin mortar.
[0010]
However, the cured fiber reinforced resin stranded wire 1 is in a smooth state due to the cured resin, and the adhesive force to the resin or the resin mortar is weak as it is.
[0011]
Therefore, since the adhesive surface area is small if it is a stranded wire, it is divided into a plurality of strands. At this time, the surface around the strands becomes a rough surface having irregularities, and by using a large number of strands, the adhesion surface area can be increased, and the adhesion to the resin or the like is improved.
[0012]
Usually, the treatment of the fiber reinforced resin stranded wire terminal is performed by, for example, heating to 200 ° C. to soften the resin on the surface of the fiber reinforced resin stranded wire, and then, as shown in FIG. It is performed by breaking the terminal portion of the stranded wire in units of strands by breaking the terminal portion while applying pressure. By this segmentation work, irregularities are imparted to the terminal portion, resulting in a rough surface and an increased adhesion to the fixing resin or the like.
[0013]
However, such a branching operation requires a complicated operation and requires a lot of time and cost.
[0014]
In addition, the conventional stranded wire has a low surface adhesion and requires a long fixing length when making prestressed concrete or embedding it in concrete as an alternative to reinforcing bars. There was a problem that it was easy to get out.
[0015]
Accordingly, an object of the present invention is to provide a method for producing a fiber reinforced resin twisted wire with improved winding property to a winder, easy end-segmenting work, and good adhesion to concrete. It is to be.
[0016]
[Means for Solving the Problems]
The above object is achieved by the method for producing a fiber-reinforced resin stranded wire according to the present invention. In summary, according to the present invention ,
(A) A plurality of uncured strands formed by combining reinforcing fibers and a thermosetting resin, which are continuously fed, are twisted together to form a twisted wire of a predetermined shape with a drawing die Molding process;
(B) a step of heating and curing the stranded wire formed into a predetermined shape;
(C) a step of splitting the cured stranded wires so that the strands are separated from each other by a branching means, and then twisting them again;
And the branching means has a hole through which each of the strands is passed, and is a die for twisting each of the strands by rotating . A manufacturing method is provided.
[0017]
According to one embodiment of the present invention , the reinforcing fibers are carbon fibers, glass fibers, aramid fibers, PBO fibers, or silicon carbide fibers.
[0018]
According to another embodiment of the present invention, the thermosetting resin is a vinyl ester resin, an epoxy resin, or an unsaturated polyester resin.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the manufacturing method of the fiber reinforced resin twisted wire which concerns on this invention is demonstrated in detail according to drawing.
[0022]
The fiber reinforced resin stranded wire of the present invention has the same configuration as the conventional fiber reinforced resin stranded wire 1 described with reference to FIGS. 1 and 2. However, the fiber reinforced resin stranded wire 1 of the present invention is different in that it is divided over the entire length after curing.
[0023]
That is, the fiber-reinforced resin stranded wire 1 of the present invention is formed by twisting the strands 2 as shown in FIG. 1, but the strands 2 are separated from each other.
[0024]
Therefore, the fiber reinforced resin stranded wire 1 of the present invention is extremely flexible compared to the conventional fiber reinforced resin stranded wire in which the strands 2 are integrally cured with resin, and is wound around a bobbin or the like. It is very easy to take.
[0025]
Moreover, the strands are separated from each other on the surface of the fiber-reinforced resin stranded wire 1 of the present invention, and therefore the surface of the stranded wire is in a very rough state. Therefore, in the fiber reinforced resin stranded wire 1 of the present invention, when fixing the terminal portion to the fixing metal, special removal of the resin on the surface of the fiber reinforced resin stranded wire by conventional heating and untwisting work are performed. Since it is possible to easily perform the line separation without requiring a line separation operation, it is possible to fix it to the fixing bracket with resin or resin mortar as it is, and to shorten the work time and the work cost.
[0026]
According to the results of the research experiments conducted by the present inventors, the same adhesion force with respect to the resin or resin mortar could be obtained. Moreover, about the concrete adhesion strength, the big value of 2 to 3 times the conventional thing was obtained.
[0027]
Further, the fiber reinforced resin stranded wire 1 of the present invention has the mechanical properties of the fiber reinforced resin stranded wire itself, that is, the tensile strength and the elastic modulus, although the strands 2 are separated from each other over the entire length. It was confirmed that it was equivalent to a conventional fiber reinforced resin stranded wire.
[0028]
The strand 2 constituting the fiber reinforced resin stranded wire 1 of the present invention is produced by impregnating a resin into a large number of reinforcing fibers f such as carbon fibers, as in the prior art.
[0029]
The reinforcing fiber is not limited to carbon fiber, and glass fiber, aramid fiber, PBO fiber, silicon carbide fiber and the like can be used. As the resin, an epoxy resin or a vinyl ester resin, and further a thermosetting resin such as an unsaturated polyester is preferably used. As an epoxy resin, what mixed the main ingredient (bisphenol A type epoxy resin) and the hardening | curing agent (amine type hardening | curing agent) by 100: 24 by weight ratio can be used. Moreover, as vinyl ester resin, what mixed the main ingredient (unsaturated polyester resin) and the hardening | curing agent (methyl ethyl ketone peroxide) by 100: 1 by weight ratio can be used. At this time, the ratio between the reinforcing fiber and the resin is 40% by volume, and preferably 50-70.
[0030]
Further, as the exterior 4 for covering the periphery of the fiber core 3 in order to prevent the strands 2 from being separated, a tape 4a made of polyester is preferably used. Those known to those skilled in the art can be used.
[0031]
In the present embodiment, the number of the strands 2 has been described as being seven. However, the present invention is not limited to this. For example, as shown in Table 1, various configurations are possible. Table 1 shows various forms of the fiber-reinforced resin twisted wire 1 of the present invention using carbon fibers as the reinforcing fibers and the mechanical properties at that time.
[0032]
[Table 1]
Figure 0003967957
[0033]
Next, the manufacturing method of the fiber reinforced resin strand 1 of this invention is demonstrated.
[0034]
In FIG. 3, one Example of the manufacturing method of the fiber reinforced resin twisted wire 1 of this invention is shown. The manufacturing method of the present embodiment is the same as the manufacturing method of the conventional fiber reinforced resin stranded wire described with reference to FIG. 6, except that the branching means 100 is disposed in the heating device 26 in the curing step. The difference is only in the point of dividing (disconnecting) the cured stranded wire. Therefore, the same reference numerals are given to the steps, devices, members, and the like having the same configuration and action, and detailed description thereof will be omitted, and the curing step that characterizes this embodiment will be described below.
[0035]
The strand 2 is produced through the unraveling step, the resin impregnation step, the convergence step, and the winding step as in the conventional case.
[0036]
The strand 2 is sent to the stranded wire manufacturing process in an uncured state, a large number of strands 2 are twisted in the twisting step, and then to the stranded wire 1 having a predetermined diameter with the drawing die 25. Shaped. The shaped uncured stranded wire 1 is sent to a curing step, and is heated and cured by a heating device 26 to a predetermined temperature, for example, about 200 ° C.
[0037]
In the present embodiment, the branching means 100 is disposed in the heating device 26. For example, the branching unit 100 splits the fiber-reinforced resin stranded wire 1 cured by being heated to 200 ° C. with the heating device 26 so that the strands 2 are separated from each other. .
[0038]
According to the present embodiment, as shown in FIG. 4, the branching unit 100 includes a cylindrical base 101 attached to the inside of the heating device 26, and a branch line attached to the inside of the base 101 via a bearing 102. And a die 103.
[0039]
As can be better understood with reference to FIG. 5, the branching die 103 has a truncated cone-shaped guide portion 104 formed at the center, and is made of fiber reinforced resin at the center of the guide portion 104 and its periphery. Since the hole 105 suitable for the strand 2 of the twisted wire 1 to pass through is equal to the number of the strands 2, the fiber-reinforced resin twisted wires 1 are formed by seven strands 2 in this embodiment. 7 are formed. Each hole 105 is formed apart from each other.
[0040]
Accordingly, in the fiber reinforced resin stranded wire 1 continuously fed into the heating device 26 and cured by being heated by the heating device 26, each strand 2 passes through the hole 105 of the branching die 103. Then, it is sent out from the heating device 26 and taken up by a winder 27. The branching die 103 is rotated so that the strands 2 are separated from each other while being rotated together with the supplied twisted wire 1 and the fiber-reinforced resin twisted wire 1 integrally heated and cured by the heating device 26. And twist again. Therefore, the fiber reinforced resin stranded wire 1 delivered from the heating device 26 is a stranded wire in which the strands 2 are separated over the entire length thereof.
[0041]
According to the present embodiment, the fiber reinforced resin twisted wire 1 of the present invention can be manufactured continuously and extremely efficiently by using the line dividing means 100 such as the line dividing die 103.
[0042]
The fiber-reinforced resin stranded wire 1 produced in this way has improved winding properties, and the winding operation by the winding machine 27 in the winding process is extremely easy. In addition, the bobbin B2 having a smaller diameter can be used as compared with the conventional case, and the transportability is dramatically improved.
[0044]
【The invention's effect】
As described above , according to the manufacturing method of the present invention, a fiber- reinforced resin stranded wire can be manufactured continuously and extremely efficiently by using a branching means as a branching die.
[Brief description of the drawings]
FIG. 1 is a perspective view for explaining an embodiment of a fiber reinforced resin twisted wire according to the present invention.
FIG. 2 is a perspective view showing an embodiment of a wire.
FIG. 3 is a diagram showing a process for explaining an embodiment of a method for producing a fiber-reinforced resin twisted wire according to the present invention.
FIG. 4 is a cross-sectional view showing an embodiment of a dividing means.
FIG. 5 is a front view of a branching die of a branching unit.
FIG. 6 is a diagram showing a process for explaining a conventional method for producing a fiber-reinforced resin stranded wire.
FIG. 7 is a diagram showing a terminal portion of a fiber reinforced resin twisted wire.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fiber reinforced resin twisted wire 2 Elementary wire 3 Fiber core 4 Exterior 21 Creel 22 Impregnation tank 23 Winder 24 Drum winder 25 Drawing die 26 Heating device 27 Winder 28 Cutting machine

Claims (3)

（ａ）連続して送給される、強化繊維と熱硬化性樹脂を複合化して形成した未だ硬化されていない複数本の素線を、撚り合わせて、絞りダイスにて所定形状の撚線に成形する工程と、
（ｂ）所定形状に成形された撚線を加熱し硬化する工程と、
（ｃ）硬化した撚線を、分線手段にて素線が互いに分離するように分線し、そして、再度撚り合わせる工程と、
を有し、前記分線手段は、各前記素線が送通される孔を有し、回転することにより各前記素線を撚り合わせるダイスであることを特徴とする繊維強化樹脂製撚線の製造法。(A) A plurality of uncured strands formed by combining reinforcing fibers and a thermosetting resin, which are continuously fed, are twisted together to form a twisted wire of a predetermined shape with a drawing die Molding process;
(B) a step of heating and curing the stranded wire formed into a predetermined shape;
(C) a step of splitting the cured stranded wires so that the strands are separated from each other by a branching means, and then twisting them again;
Have a, the divided line means comprises a hole in which each element wire is passed feed, fiber-reinforced resin stranded wire, characterized in that the die twisting together each said wire by rotating Manufacturing method. 強化繊維は、炭素繊維、ガラス繊維、アラミド繊維、ＰＢＯ繊維、又は炭化珪素繊維であることを特徴とする請求項１の繊維強化樹脂製撚線の製造法。The method for producing a fiber-reinforced resin twisted wire according to claim 1, wherein the reinforcing fiber is carbon fiber, glass fiber, aramid fiber, PBO fiber, or silicon carbide fiber. 前記熱硬化性樹脂は、ビニルエステル樹脂、エポキシ樹脂、又は不飽和ポリエステル樹脂であることを特徴とする請求項１又は２の繊維強化樹脂製撚線の製造法。The method for producing a fiber-reinforced resin stranded wire according to claim 1 or 2, wherein the thermosetting resin is a vinyl ester resin, an epoxy resin, or an unsaturated polyester resin.
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JP5054906B2 (en) * 2005-09-09 2012-10-24 東レ株式会社 Carbon fiber composite resin wire for reinforcing concrete or mortar, method for producing the same, and concrete or mortar structure
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