JP4163883B2

JP4163883B2 - Toothed belt woven fabric

Info

Publication number: JP4163883B2
Application number: JP2002067851A
Authority: JP
Inventors: 広之小和田; 雅紀鈴木; 佳一郎太治; 暢浩吉村
Original assignee: Izumi Cosmo Co Ltd; Toray Industries Inc
Current assignee: Izumi Cosmo Co Ltd; Toray Industries Inc
Priority date: 2002-03-13
Filing date: 2002-03-13
Publication date: 2008-10-08
Anticipated expiration: 2022-03-13
Also published as: JP2003269542A

Description

【０００１】
【発明が属する技術分野】
本発明は、歯付きベルトの噛合せ面に積層して使用される歯付きベルト用織布、および歯付きベルトの製造方法に関する。
【０００２】
【従来の技術】
一般に歯付ベルトは、心線を埋め込んだリング状ゴムベルトの内面側に、ベルトの走行方向とは直角方向、等間隔に歯車状の横溝を並べてその表面に織布を積層した歯車状噛合せ面が形成されていて、複数の歯付きプーリーと噛み合わせてプーリー間における動力伝達部材として使用される。
【０００３】
歯付きベルトは、通常、噛合せ面を成形するために、外周面の軸方向にそって多数の歯車状条溝を等間隔に並べた円筒状の成形金型を用いて製造される。一例をあげて説明すると、まず、噛合せ面を成形する前記成形金型の外周面にレゾルシン−ホルマリン−ゴムラテックス（ＲＦＬともいう）などの薬剤を含浸した歯付きベルト用織布を巻き、その表面に心線を巻く。さらに、未加硫のゴムシートを巻き付け、加熱、加圧して加硫し成形する。前記の織布は、ゴムシートとともに成形型に押し込まれ、噛合せ面の表面に貼り付いて積層される。加硫し成形した成型物を型からはずし、所要のベルト幅でリング状に切断して歯付きベルトにする。円筒状成形型における周方向はベルトの長手方向（走行方向）になる。
【０００４】
従来の製造方法において前記の歯付きベルト用織布は、ベルト製造時に所要の破断伸度および伸縮応力を発現する伸縮性糸をよこ糸に、非伸縮性糸をたて糸に用いて織成していた。織成した織布は、所定の幅で横方向に切断され、よこ糸に用いた伸縮性糸を円筒状成形型の周方向に合わせて巻き付け、歯付きベルトに成形することによって、伸縮性糸の方向をベルトの長手方向にしていた。
【０００５】
歯付きベルト用織布についてこの様な手順を採用するに至った理由を説明する。通常、歯付きベルト用に製織された織布は、製織後一旦ロールに巻き上げられて後加工工程に送られる。巻き上げられた織布は、後加工工程において連続して引き取られ、リラックス、精練、染色、ＲＦＬなどの薬剤含浸、ゴム糊塗布などの処理を施される。この間、織布は長手方向に張力を受けることが多い。たとえば、薬剤含浸に際して織布は、接着剤槽に浸漬されて接着剤を含浸し、ニップロールにより引き上げられる。織布のたて糸に伸縮性糸を用いると、伸縮性糸はこれら工程において受けた引張応力のためにたて方向に伸長され伸長状態のまま成形されるので、成形したベルトは長手方向に所要の伸縮性を維持することができなくなる。
【０００６】
従来の歯付きベルト用織布では、たて糸に非伸縮性糸を用い、伸縮性糸をよこ糸に用いて工程中の引張力が伸縮性糸の負荷になることを回避しておいて、成型時になってからよこ糸をベルトの長手方向になる成形金型の周方向に合わせて積層することにより、織布の伸長特性を維持せざるを得なかったのである。
【０００７】
【発明が解決しようとする課題】
さて、最近の傾向として歯付きベルトにおいても少量多品種生産の必要性が増してきた。ところが、従来の歯付きベルト用織布では、織布の伸縮方向の長さ、すなわちベルトの長手方向の長さが、比較的短い伸縮性織布の幅方向に限定されるために、少量多品種生産では歯付きベルト製造工程を煩雑にするばかりではなく、長さの異なる歯付きベルトに用いる織布を同時に製造する場合等において、無駄な織布を生じやすいなどの問題を抱えるようになった。本発明は、これらの問題点を解消することを課題に完成されたものである。
【０００８】
【課題を解決するための手段】
実施形態例を示す図面を参照して本発明を説明する。本発明は、前記の課題を
解決する手段として、伸縮性たて糸３を用いた伸縮性織布１に、織成後の後加工
において前記伸縮性たて糸３と同程度の熱収縮性を有する、沸騰水収縮率が１５
〜８０％の範囲内にある高収縮ポリエステル糸又は高収縮ナイロン糸、および、
７０℃熱水収縮率が１０〜８０％の範囲内にある高収縮水溶性ビニロン糸から選
ばれる非伸縮性たて糸４を用いた非伸縮性部分２を、織布の中央部と両端とに設
定し縞状に織り込んで一体に織成したことを特徴とする歯付きベルト用織布を提
供する。非伸縮性部分２を除く伸縮性織布１は、後加工後において、たて方向に
おける破断伸度（伸び率）が、少なくとも７０％であることが好ましく、また、
たて方向における５０％伸長時の伸縮応力が、１３０Ｎを超えないことが好まし
い。伸縮性たて糸３としては、ナイロン仮撚り加工糸、または弾性糸が好適であ
る。
【０００９】
さらに本発明は、前記の歯付きベルト用織布６を織成して所要の後加工を施し非伸縮性部分２を切除して、残った伸縮性織布１を構成する伸縮性たて糸３の方向を、歯付きベルトの噛合せ面を成形する円筒状成形金型の周方向に一致させて巻きつけ、歯付きベルトを製造することを特徴とする歯付きベルトの製造方法を提供する。
【００１０】
【発明の実施の形態】
以下、本発明につき実施形態例をあげ、図面を参照して具体的に説明する。図１は本発明歯付きベルト用織布の模式的平面図、図２は、歯付きベルトの構成を説明する一部切り欠き斜視図である。また、本発明においてあげた特性値のうち、破断強度、破断伸度、熱水収縮率、伸縮復元率は、ＪＩＳＬ１０１３「引張強さ及び伸び率」、「熱水収縮率」、「伸縮復元率」に準じて測定し、５０％伸張時応力は、ＪＩＳＬ１０１３「引張強さ及び伸び率」の引張強さ−伸び率曲線から読みとった値である。なお、熱水収縮率として沸騰水収縮率を用いる場合が多いが、後工程の加熱温度や測定対象の糸の特性などによっては実用上有意な熱水温度において測定する。
【００１１】
さて、本発明は、伸縮性のたて糸３を用いて織成されてはいるが、その伸縮性たて糸３には織成後の後加工工程において張力が加えられることのない歯付きベルト用織布６を提供することによって、課題を解決するものである。具体的に説明すると、たて糸に伸縮性糸３を用いて織成した伸縮性織布１中に、織成後に施される後加工、すなわち染色、樹脂加工、乾燥などにより、前記伸縮性糸３とほぼ同程度に熱収縮するが伸縮性に乏しい非伸縮性糸４をたて糸として使用した非伸縮性部分２を少なくとも１条、適宜に縞状に織り込んで伸縮性織布１と一体に織成した歯付きベルト用織布６である。
【００１２】
なお、後加工によって生じる熱収縮は、実質的に、伸縮性糸においては熱水収縮率と伸縮復元率との和を、非伸縮性糸では伸縮復元率が小さいので熱水収縮率をもって表される。また、前記「同程度」の範囲は、熱収縮の差によって伸縮性織布に使用上の不都合が発生しない範囲であればよく、桁違いの相異ではないという程度を意味する。
【００１３】
歯付きベルト用織布６製造の後加工工程では、リラックス、染色、ＲＦＬなどの薬剤含浸、ゴム糊塗布などの諸操作を施すために、連続走行させ、あるいは薬剤槽に連続浸漬し重量増となった織布を引き上げるなど、たて方向に可成りの張力を生じる操作が必要になるが、縞状に織り込んだ非伸縮性部分２によって伸縮性織布１の伸長が抑制され、その特性を失うことなく伸縮性織布１に所要の後加工を施すことができる。後加工を施した歯付きベルト用織布６は、非伸縮性部分２を切除して残る伸縮性織布１を歯付きベルトの製造に使用する。
【００１４】
本発明歯付きベルト用織布の伸縮性たて糸３には、ウーリーナイロンと呼ばれているナイロン仮撚り加工糸やポリウレタンコアヤーンなどの弾性糸が好適であるが、ポリエステルなど他のオレフィン系合成繊維の仮撚り加工糸を用いることもできる。織布１としてはベルトの歯形をシャープに出すために、非伸縮性部分２を除いた伸縮性織布１のたて方向の破断伸度は、少なくとも７０％であることが望ましい。また、同様に非伸縮性部分２を除いた伸縮性織布１のたて方向における５０％伸長時の伸縮応力は、低応力で高強度が得られる１３０Ｎを、好ましくは８０Ｎを超えないことが望まれる。伸縮性たて糸３の伸縮復元率は、１５〜７０％の範囲、好ましくは４０％以上、とくに好ましくは５０％以上のものを用いる。伸縮性たて糸３の強度は３〜６ｃＮ／ｄｔｅｘ、伸度は１５〜４０％、沸騰水収縮率は２〜７％が好ましい。繊度は、一般に３３〜３３０ｄｔｅｘ、要求によってはこれらを合糸して大繊度にしてもよく、その上限は１０００ｄｔｅｘｄ程度である。
【００１５】
また、たて糸に用いる非伸縮性糸４としては、織成後に施される加熱処理により伸縮性たて糸３と同程度に熱収縮し、伸縮性に乏しい非伸縮性糸を用いる。すなわち、高収縮ポリエステル糸や高収縮ナイロン糸などでは、沸騰水収縮率が１５〜８０％、好ましくは４０〜６０％の範囲内にあるものを好適に用いることができる。また、高収縮水溶性ビニロン糸では、７０℃熱水収縮率が１０〜８０％、好ましくは５０〜７０％の範囲内にあるものが好適である。前記条件を満足する非伸縮性糸であれば、天然繊維糸、合成繊維糸、フィラメント糸、紡績糸を問わないが、高収縮ポリエステル糸および／または高収縮ナイロン糸、ならびに高収縮水溶性ビニロン糸が好適である。
【００１６】
本発明歯付きベルト用織布６のよこ糸５には、形状安定性の点から好ましくは非伸縮性糸を用いるが、とくに制限はない。求められる製品特性、製品の製造工程において横方向にかかる張力等を勘案し、適宜に伸縮性糸を選択してもよい。
【００１７】
本発明歯付きベルト用織布６の組織は、要求される特性に従って適宜に選択できるが、一般的には平織、朱子織り、綾織りが好適である。織成には、エアージェット、レピア、スルーザーなどの織機を適宜に利用すればよい。歯付きベルト用織布６は、伸縮性織布１に非伸縮性部分２を少なくとも１条、縞状に織り込むが、非伸縮性部分２の幅、位置や間隔などは、後加工において受ける張力により伸縮性織布１に必要な特性が影響されないことを条件に、任意に設定することができる。好ましくは、幅が数ｃｍ程度の非伸縮性部分２を織布の中央部と両端とに設定する。
【００１８】
前記のようにして準備された歯付きベルト用織布６は、通常、ＲＦＬなどの必要な薬剤を含浸させ乾燥するなどの所要の後加工を施す。後加工を施した歯付きベルト用織布６は非伸縮性部分２を切除して、残った伸縮性織布１を歯付きベルトの製造に使用する。歯付きベルトの噛合せ面７を成形するための円筒状成形型の型面に、歯付きベルト９の長手方向と伸縮性たて糸３の方向とを同じくして巻き付け、巻き付けた歯付きベルト用織布の上に心線８を巻き、さらに、未加硫のゴムシートを巻き付けて加熱、加圧し、加硫し成形して脱型する。脱型した成型物を所要のベルト幅でリング状に切断し仕上げて、歯付きベル１０を製造する。図２における１０は加硫ゴム部分である。
【００１９】
【実施例】
以下、本発明の実施例について説明する。
【００２０】
実施例１
７８ｄｔｅｘ−２４ｆのナイロン糸を仮撚り数３４００回、仮撚り加工フィード３％、ヒーター温度２１５℃、加工スピード９０ｍ／ｍｉｎの条件で仮撚り加工して伸縮性糸を製造した。伸縮性糸の特性値を表１に示す。非伸縮性糸として８４ｄｔｅｘ−３６ｆのポリエステル糸を用いたのでその特性値を併せて表１に示す。
【００２１】
前記伸縮性糸２，０００本、非伸縮性糸２００本の順で縞状に配置してたて糸に用い、７８ｄｔｅｘ−２４ｆのナイロン糸をよこ糸に用い、たて密度１０１本／ｉｎ、よこ密度７３本／ｉｎの平織物をエアージェットルームを使用し、５５０ｒｐｍで製織した。なお、製織は整経機に伸縮性糸と非伸縮性糸を配列した上で整経ビームに巻き取り、速乾性糊材（糊付温度４０℃）を使用し、乾燥温度６５℃で糊付実施後、織機ビームに巻き取った。
【００２２】
得られた織物を液流染色機に投入し、界面活性剤を主成分とする精錬剤でリラックス精錬して糊剤を落とした後、染色加工した。ついで樹脂との接着性を向上させるためにパディング装置を介し８０ｍ／ｍｉｎでレゾルシン−ホルマリン（ＲＦ）液含浸処理、１３０ｍ／ｍｉｎで仕上げ乾燥セットして歯付ベルト用織布を得た。この織布のたて破断伸度は、１１５％、たて破断強度は４０２Ｎ／３ｃｍ、５０％伸張時応力は３３Ｎ／３ｃｍであった。
【００２３】
一般的な製造方法に従って、この歯付ベルト用織布から非伸縮性部分を切除し、残る伸縮性織布を円筒状の歯付ベルト用金型の外周面に、たて糸方向と金型の周方向とを一致させて巻き、その表面に心線を巻き付けた。ついで未加硫のゴムシートを巻き付け、加熱加圧して加硫成型し金型から外しベルト幅に切断して歯付ベルトを製造した。製造工程は合理的になって製造工数は削減され、製品に何ら不具合な点は、見出せなかった。
【００２４】
【表１】

実施例２
１１０ｄｔｅｘ−３０ｆのナイロン糸を仮撚り数２８００回、仮撚り加工フィード３％、ヒーター温度２１５℃の条件で仮撚り加工した後、合糸しトータル繊度２２０ｄｔｅｘの伸縮性糸を得た。伸縮性糸の特性値を表２に示す。非伸縮性糸として２５０ｄｔｅｘ−４８ｆの高収縮水溶性ビニロン糸を用いたのでその特性値を併せて表２に示す。これらの伸縮性糸および非伸縮性糸を用い、実施例１と同様にしてレピアルームを使用して密度６８本／ｉｎ、よこ密度５８本／ｉｎの３／１の綾織物を４００ｒｐｍで製織した。
【００２５】
製織した綾織物に実施例１と同様の後加工を施し歯付ベルト用織布を得た。この織布のたて破断伸度は、１０６％、たて破断強度は９６４Ｎ／３ｃｍ、５０％伸張時応力は６８Ｎ／３ｃｍであった。製造工程は合理的になって製造工数は削減され、製品には何ら不具合なみられなかった。
【００２６】
【表２】

【００２７】
【発明の効果】
本発明を利用することによって、歯付きベルトの少量多品種化に容易に対応することができるようになった。すなわち、歯付きベルトを、従来のように織布の幅ではなく、歯付きベルト用織布のたて方向を歯付きベルトの長手方向（走行方向）と一致させて成形し製造することができるので、従来のように横方向に切断する工程を合理化できるなどの効果を奏し、加えて、品種多様化に対する製造工程の構成が容易になる。さらに、伸縮性たて糸の配列や密度を適宜の幅で変更し、伸長特性の異なる歯付きベルト用織布を同時に製織し、その織布を用いて異なる歯付きベルトを同時に製造することができる。また、異なる長さの歯付きベルト用織布を自由に利用することができるので、織布の無駄がなく、製造工数を節減でき、品質においてもたて方向の寸法安定性を向上させる効果がある。
【図面の簡単な説明】
【図１】本発明歯付きベルト用織布の模式的平面図
【図２】歯付きベルトの構成説明図
【符号の説明】
１：伸縮性織布２：非伸縮性たて糸を用いた織布部分
３：伸縮性たて糸４：非伸縮性たて糸
５：よこ糸６：歯付きベルト用織布
７：噛合せ面８：心線
９：ゴム（加硫）１０：歯付きベルト
Ａ：たて方向Ｂ：よこ（幅）方向[0001]
[Technical field to which the invention belongs]
The present invention relates to a woven fabric for a toothed belt used by being laminated on a meshing surface of a toothed belt, and a method for manufacturing the toothed belt.
[0002]
[Prior art]
Generally, a toothed belt is a gear-shaped meshing surface in which gear-shaped lateral grooves are arranged at equal intervals in the direction perpendicular to the belt running direction on the inner surface side of a ring-shaped rubber belt embedded with a core wire, and a woven fabric is laminated on the surface. And is used as a power transmission member between the pulleys by meshing with a plurality of toothed pulleys.
[0003]
In general, a toothed belt is manufactured using a cylindrical molding die in which a large number of gear-shaped grooves are arranged at equal intervals along the axial direction of the outer peripheral surface in order to form a meshing surface. An example will be described. First, a toothed belt woven fabric impregnated with a drug such as resorcin-formalin-rubber latex (also referred to as RFL) is wound around the outer peripheral surface of the molding die for molding the mating surface, Wrap a cord on the surface. Further, an unvulcanized rubber sheet is wound, heated and pressurized, vulcanized and molded. The woven fabric is pushed into a mold together with a rubber sheet, and is stuck to the surface of the meshing surface and laminated. The molded product formed by vulcanization is removed from the mold and cut into a ring shape with a required belt width to form a toothed belt. The circumferential direction in the cylindrical mold is the longitudinal direction (running direction) of the belt.
[0004]
In the conventional manufacturing method, the above-described toothed belt woven fabric is woven using a stretchable yarn that develops required breaking elongation and stretch stress at the time of belt production as a weft yarn and a non-stretchable yarn as a warp yarn. The woven fabric is cut in the transverse direction with a predetermined width, wound with the stretchable yarn used for the weft yarn in accordance with the circumferential direction of the cylindrical mold, and formed into a toothed belt, the direction of the stretchable yarn In the longitudinal direction of the belt.
[0005]
The reason why such a procedure has been adopted for the woven fabric for the toothed belt will be described. Usually, a woven fabric woven for a toothed belt is once wound up on a roll after weaving and sent to a post-processing step. The wound woven fabric is continuously taken up in a post-processing step, and subjected to treatments such as relaxation, scouring, dyeing, impregnation with RFL, and application of rubber glue. During this time, the woven fabric is often subjected to tension in the longitudinal direction. For example, when impregnated with a chemical, the woven fabric is immersed in an adhesive tank so as to impregnate the adhesive, and is pulled up by a nip roll. When a stretchable yarn is used for the warp of the woven fabric, the stretchable yarn is stretched in the warp direction due to the tensile stress received in these processes and molded in the stretched state. The elasticity cannot be maintained.
[0006]
In conventional woven fabrics for toothed belts, non-stretchable yarn is used for the warp yarn, and the stretchable yarn is used for the weft yarn to avoid the tensile force during the process from being applied to the stretchable yarn. After that, the weft yarn was laminated in accordance with the circumferential direction of the molding die that is the longitudinal direction of the belt, so that the elongation characteristics of the woven fabric had to be maintained.
[0007]
[Problems to be solved by the invention]
Now, as a recent trend, the need for low-volume, multi-product production has also increased for toothed belts. However, in the conventional woven fabric for a toothed belt, the length in the stretch direction of the woven fabric, that is, the length in the longitudinal direction of the belt is limited to the width direction of the relatively short stretch woven fabric. In the production of varieties, not only the toothed belt manufacturing process is complicated, but also when woven fabrics used for toothed belts of different lengths are manufactured at the same time, there is a problem that wasteful woven fabrics are easily generated. It was. The present invention has been completed to solve these problems.
[0008]
[Means for Solving the Problems]
The present invention will be described with reference to the drawings illustrating exemplary embodiments. As a means for solving the above-mentioned problem, the present invention provides a stretchable woven fabric 1 using a stretchable warp yarn 3 having a heat shrinkability comparable to that of the stretchable warp yarn 3 in post-processing after weaving. Water shrinkage is 15
High shrinkage polyester yarn or high shrinkage nylon yarn in the range of ~ 80%, and
A non-stretchable portion 2 using a non-stretchable warp yarn 4 selected from a highly shrinkable water-soluble vinylon yarn having a 70 ° C. hot water shrinkage in the range of 10 to 80% is provided at the center and both ends of the woven fabric.
A constant and toothed belt fabric, characterized in that woven integrally woven in stripes to provide. The stretchable woven fabric 1 excluding the non-stretchable portion 2 preferably has a breaking elongation (elongation) in the vertical direction of at least 70% after post-processing,
It is preferable that the stretching stress at 50% elongation in the vertical direction does not exceed 130N. As the elastic warp yarn 3, nylon false twisted yarn or elastic yarn is suitable.
[0009]
Further, in the present invention, the above-described toothed belt woven fabric 6 is woven and subjected to necessary post-processing to cut out the non-stretchable portion 2, and the direction of the stretchable warp yarn 3 constituting the remaining stretchable woven fabric 1 is determined. A method for manufacturing a toothed belt is provided, wherein a toothed belt is manufactured by winding the toothed belt so as to coincide with a circumferential direction of a cylindrical mold for forming a meshing surface of the toothed belt.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic plan view of a woven fabric for a toothed belt according to the present invention, and FIG. 2 is a partially cutaway perspective view illustrating the configuration of the toothed belt. Among the characteristic values given in the present invention, the breaking strength, breaking elongation, hot water shrinkage, and expansion / contraction recovery rate are JIS L1013 “tensile strength and elongation”, “hot water shrinkage”, “stretching expansion / contraction”. The 50% elongation stress is a value read from the tensile strength-elongation curve of JIS L1013 "Tensile strength and elongation". In many cases, the boiling water shrinkage is used as the hot water shrinkage, but it is measured at a hot water temperature that is practically significant depending on the heating temperature in the subsequent process and the characteristics of the yarn to be measured.
[0011]
The present invention is a woven fabric for a toothed belt which is woven using a stretchable warp yarn 3 but is not subjected to tension in a post-processing step after weaving. By providing 6, the problem is solved. Specifically, in the elastic woven fabric 1 woven using the elastic yarn 3 in the warp yarn, the elastic yarn 3 and the elastic yarn 3 are formed by post-processing applied after weaving, that is, dyeing, resin processing, drying, and the like. Teeth woven integrally with the stretchable woven fabric 1 by weaving at least one non-stretchable portion 2 using the non-stretchable yarn 4 which is heat-shrinkable to the same extent but having poor stretchability as a warp. It is a woven fabric 6 with a belt.
[0012]
The heat shrinkage caused by post-processing is substantially expressed as the sum of the hot water shrinkage rate and the stretch recovery rate for stretchable yarns, and the hot water shrinkage rate for non-stretchable yarns because the stretch recovery rate is small. The Further, the “same level” range may be a range that does not cause inconvenience in use of the stretchable woven fabric due to a difference in heat shrinkage, and means a level that is not inconsistent.
[0013]
In the post-processing step of manufacturing the toothed belt woven fabric 6, in order to perform various operations such as relaxation, dyeing, RFL and other chemical impregnation, and rubber paste application, it is continuously run or immersed in a chemical bath to increase the weight. The operation of generating a considerable tension in the vertical direction, such as pulling up the woven fabric, becomes necessary, but the stretch of the stretchable woven fabric 1 is suppressed by the non-stretchable portion 2 woven in a striped shape, and its characteristics are improved. Necessary post-processing can be applied to the elastic woven fabric 1 without losing it. In the toothed belt woven fabric 6 subjected to post-processing, the elastic woven fabric 1 remaining by cutting away the non-stretchable portion 2 is used for manufacturing a toothed belt.
[0014]
The elastic warp 3 of the woven fabric for toothed belt of the present invention is preferably an elastic yarn such as nylon false twisted yarn called polyurethane wool or polyurethane core yarn, but other olefinic synthetic fibers such as polyester can be used. A false twisted yarn can also be used. The woven fabric 1 desirably has a breaking elongation in the warp direction of the stretchable woven fabric 1 excluding the non-stretchable portion 2 of at least 70% in order to sharpen the tooth profile of the belt. Similarly, the stretching stress at 50% elongation in the warp direction of the stretchable woven fabric 1 excluding the non-stretchable portion 2 may not exceed 130 N, preferably 80 N, at which high strength is obtained with low stress. desired. The stretch recovery rate of the stretchable warp yarn 3 is in the range of 15 to 70%, preferably 40% or more, particularly preferably 50% or more. The strength of the stretchable warp yarn 3 is preferably 3 to 6 cN / dtex, the elongation is 15 to 40%, and the boiling water shrinkage is preferably 2 to 7%. The fineness is generally 33 to 330 dtex, and depending on requirements, these may be combined to obtain a large fineness, and the upper limit is about 1000 dtexd.
[0015]
Further, as the non-stretchable yarn 4 used for the warp yarn, a non-stretchable yarn which is thermally contracted to the same extent as the stretchable warp yarn 3 by heat treatment applied after weaving and has poor stretchability is used. That is, as the high shrinkage polyester yarn and the high shrinkage nylon yarn, those having a boiling water shrinkage in the range of 15 to 80%, preferably 40 to 60% can be suitably used. In addition, a high shrinkage water-soluble vinylon yarn having a 70 ° C. hot water shrinkage rate of 10 to 80%, preferably 50 to 70% is suitable. Any non-stretchable yarn satisfying the above conditions may be natural fiber yarn, synthetic fiber yarn, filament yarn, spun yarn, high shrinkage polyester yarn and / or high shrinkage nylon yarn, and high shrinkage water-soluble vinylon yarn. Is preferred.
[0016]
The weft yarn 5 of the toothed belt woven fabric 6 of the present invention is preferably a non-stretchable yarn from the viewpoint of shape stability, but is not particularly limited. The elastic yarn may be appropriately selected in consideration of required product characteristics, tension in the transverse direction in the manufacturing process of the product, and the like.
[0017]
The structure of the toothed belt woven fabric 6 of the present invention can be appropriately selected according to the required characteristics, but in general, plain weave, satin weave, and twill weave are suitable. For weaving, a loom such as an air jet, rapier, or throughr may be used as appropriate. The toothed belt woven fabric 6 weaves at least one non-stretchable portion 2 into the stretchable woven fabric 1 in a striped manner. The width, position, spacing, etc. of the non-stretchable portion 2 are the tensions applied in post-processing. Therefore, it can be arbitrarily set on condition that the necessary characteristics of the stretchable woven fabric 1 are not affected. Preferably, the non-stretchable portion 2 having a width of about several centimeters is set at the center and both ends of the woven fabric.
[0018]
The toothed belt woven fabric 6 prepared as described above is usually subjected to necessary post-processing such as impregnation with a necessary medicine such as RFL and drying. The non-stretchable portion 2 of the toothed belt woven fabric 6 subjected to post-processing is cut out, and the remaining stretchable woven fabric 1 is used for manufacturing a toothed belt. A toothed belt weave wound around the mold surface of a cylindrical mold for forming the meshing surface 7 of the toothed belt, with the longitudinal direction of the toothed belt 9 and the direction of the stretchable warp 3 being the same. The core 8 is wound on the cloth, and further, an unvulcanized rubber sheet is wound, heated and pressurized, vulcanized, molded, and demolded. The demolded molded product is cut into a ring shape with a required belt width and finished to produce the toothed bell 10. 2 in FIG. 2 is a vulcanized rubber part.
[0019]
【Example】
Examples of the present invention will be described below.
[0020]
Example 1
A 78 dtex-24f nylon yarn was subjected to false twisting under the conditions of 3400 false twists, 3% false twist feed, a heater temperature of 215 ° C., and a processing speed of 90 m / min to produce an elastic yarn. Table 1 shows the characteristic values of the elastic yarn. Since a 84 dtex-36f polyester yarn was used as the non-stretchable yarn, the characteristic values are also shown in Table 1.
[0021]
The warp yarn is arranged in the order of 2,000 stretch yarns and 200 non-stretch yarns, and 78 dtex-24f nylon yarn is used for the weft yarn. The warp density is 101 yarns / in and the weft density is 73. The plain fabric of this / in was woven at 550 rpm using an air jet loom. For weaving, stretchable yarn and non-stretchable yarn are arranged on a warping machine, wound around a warping beam, glued at a drying temperature of 65 ° C using a quick-drying paste (40 ° C pasting temperature). After execution, it was wound around a loom beam.
[0022]
The obtained woven fabric was put into a liquid dyeing machine, relaxed and refined with a refining agent mainly composed of a surfactant, and the paste was removed, followed by dyeing. Subsequently, in order to improve the adhesiveness with the resin, it was impregnated with a resorcin-formalin (RF) solution at 80 m / min through a padding device, and finished and set at 130 m / min to obtain a woven fabric for a toothed belt. The warp breaking elongation of this woven fabric was 115%, the warp breaking strength was 402 N / 3 cm, and the stress at 50% elongation was 33 N / 3 cm.
[0023]
In accordance with a general manufacturing method, a non-stretchable portion is cut out from the toothed belt woven fabric, and the remaining stretchable woven fabric is placed on the outer peripheral surface of the cylindrical toothed belt mold, in the warp direction and the mold periphery. Winding with the direction matched, the core wire was wound around the surface. Then, an unvulcanized rubber sheet was wound, heated and pressurized to vulcanize and molded, removed from the mold and cut into a belt width to produce a toothed belt. The manufacturing process was rationalized, the number of manufacturing steps was reduced, and no problems were found in the product.
[0024]
[Table 1]

Example 2
A nylon yarn of 110 dtex-30f was false twisted under the conditions of 2800 false twists, 3% false twist feed and 215 ° C. heater temperature, and then combined to obtain an elastic yarn having a total fineness of 220 dtex. Table 2 shows the characteristic values of the elastic yarn. Since a high-shrinkage water-soluble vinylon yarn of 250 dtex-48f was used as the non-stretchable yarn, the characteristic values are also shown in Table 2. Using these elastic yarns and non-elastic yarns, a rapier loom was used in the same manner as in Example 1 to weave a 3/1 twill fabric having a density of 68 yarns / in and a weft density of 58 yarns / in at 400 rpm.
[0025]
The weave twill fabric was subjected to post-processing similar to that in Example 1 to obtain a woven fabric for a toothed belt. The warp breaking elongation of this woven fabric was 106%, the warp breaking strength was 964 N / 3 cm, and the stress at 50% elongation was 68 N / 3 cm. The manufacturing process was rationalized, the number of manufacturing steps was reduced, and there were no problems with the product.
[0026]
[Table 2]

[0027]
【The invention's effect】
By utilizing the present invention, it has become possible to easily cope with a small variety of toothed belts. That is, the toothed belt can be formed and manufactured by matching the longitudinal direction of the toothed belt (running direction) with the longitudinal direction of the toothed belt, not the width of the woven fabric as in the prior art. Therefore, there is an effect that the process of cutting in the horizontal direction as in the past can be rationalized, and in addition, the configuration of the manufacturing process for variety diversification becomes easy. Furthermore, it is possible to change the arrangement and density of the stretch warp yarns with an appropriate width, and simultaneously weave woven fabrics for toothed belts having different elongation characteristics, and simultaneously manufacture different toothed belts using the woven fabrics. In addition, since the woven fabrics for toothed belts with different lengths can be freely used, there is no waste of the woven fabric, the number of manufacturing steps can be reduced, and the dimensional stability in the vertical direction can be improved in quality. is there.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a woven fabric for a toothed belt of the present invention. FIG. 2 is an explanatory diagram of the configuration of a toothed belt.
1: Stretch woven fabric 2: Woven fabric portion using non-stretch warp 3: Stretch warp 4: Non-stretch warp 5: Weft 6: Woven fabric for toothed belt 7: Interlocking surface 8: Core wire 9 : Rubber (vulcanized) 10: Toothed belt A: Vertical direction B: Horizontal (width) direction

Claims

The stretchable woven fabric (1) using the stretchable warp yarn (3) has a heat shrinkage comparable to that of the stretchable warp yarn in the post-processing after weaving, and has a boiling water shrinkage of 15 to 80%. At least one non-stretch warp selected from high-shrinkage polyester yarn or high-shrinkage nylon yarn in the range, and high-shrinkage water-soluble vinylon yarn having a hot water shrinkage rate in the range of 10 to 80%. non-stretchable portion (2) with (4), the central portion of the fabric
A woven fabric for toothed belts, which is woven in a striped pattern and is integrally woven.

The elongation at break (elongation) in the warp direction of the stretchable woven fabric excluding the non-stretchable portion after post-processing is at least 70%. Toothed belt woven fabric.

The stretch stress at 50% elongation in the warp direction of the stretchable woven fabric excluding the non-stretchable portion after post-processing does not exceed 130N. The woven fabric for toothed belts as described.

The stretchable warp is a nylon false twisted yarn.
Or the woven fabric for toothed belts of 3.

The woven fabric for a toothed belt according to claim 1, wherein the elastic warp is an elastic yarn.

The tooth according to any one of claims 1 to 5, wherein the boiling water shrinkage of the high-shrinkage polyester yarn or the high-shrinkage nylon yarn used as the non-stretch warp is in the range of 40 to 60%. Woven fabric for belt.

The high-shrinkage water-soluble vinylon yarn used as a non-stretch warp yarn has a 70 ° C. hot water shrinkage ratio,
The woven fabric for a toothed belt according to any one of claims 1 to 5, wherein the woven fabric is used in a range of 50 to 70%.

The woven fabric for a toothed belt (6) according to any one of claims 1 to 7, is subjected to the necessary post-processing, and the non-stretchable portion (2) is cut out, and the remaining stretchable woven fabric (1) The toothed belt is manufactured by winding the elastic warp yarn (3) constituting the toothed belt so as to coincide with the circumferential direction of the cylindrical molding die for forming the meshing surface (7) of the toothed belt. The manufacturing method of the toothed belt characterized by the above-mentioned.