JP4445112B2 - Wire winding device for forming transmission belts - Google Patents

Wire winding device for forming transmission belts Download PDF

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Publication number
JP4445112B2
JP4445112B2 JP2000278131A JP2000278131A JP4445112B2 JP 4445112 B2 JP4445112 B2 JP 4445112B2 JP 2000278131 A JP2000278131 A JP 2000278131A JP 2000278131 A JP2000278131 A JP 2000278131A JP 4445112 B2 JP4445112 B2 JP 4445112B2
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core wire
wound
outer periphery
reinforcing material
core
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JP2002086581A (en
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進 上総
忠 小玉
薫 土井
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Mitsuboshi Belting Ltd
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Mitsuboshi Belting Ltd
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【０００１】
【発明の属する技術分野】
本発明は、歯付ベルトなど、心線がベルト長手方向に沿って埋入された伝動ベルトを成形する際に、成形用の金型に心線を巻き付けるために用いられる装置に関するものである。
【０００２】
【従来の技術】
歯付ベルトなどの伝動ベルトを製造するにあたっては、例えば次のようにして行なわれている。すなわち図３（ａ）に示すような、外周に歯部成形用の凹溝１１を軸方向と並行に多数本設けて形成した円筒状の金型２を用い、まずこの金型２の外周に帆布などのシート材を筒状にした補強材１を被せ、次に金型２に被せた補強材１の外周に心線４をスパイラル状に巻き付ける。この後、心線４の上から補強材１の外周に未加硫のゴムシート１２を巻き付け、これを加熱・加圧して加硫することによって、円筒状のスリーブを成形する。そしてこのスリーブを輪切りするように切断することによって、図３（ｂ）に示すような、片面に補強材１で表面が補強された歯部１３が所定ピッチで形成され、複数本の心線４がベルト長手方向に埋入された伝動ベルトＴを得ることができるものである。
【０００３】
ここで、上記のように金型２に被せた補強材１の外周に心線４をスパイラル状に巻き付けるために、特公平６−９２１３３号公報などで提供されているように、タッチプーリ３が使用されている。タッチプーリ３は円柱状に形成されるものであって、軸１５を中心にして回転自在にしてある。このタッチプーリ３は回転駆動される金型２の回転軸１６に軸１５が平行になるように金型２の外周部に配置されるものであり、金型２の軸方向と平行に移動駆動されるようにしてある。
【０００４】
図４及び図５は従来のタッチプーリ３の一例を示すものであり、その軸方向の一方の端部は巻付け心線押さえ部５として、軸方向の他の部分は巻済み心線押さえ部６としてそれぞれ形成してある。巻付け心線押さえ部５の外周には心線ガイド溝１７が凹設してある。尚、図のものは、Ｓ撚りとＺ撚りの一対の心線４を同時に巻き付ける２条巻きに用いるために２本の心線ガイド溝１７が凹設してあるが、１条巻の場合には１本の心線ガイド溝１７を凹設したタッチプーリ３を用いる。そして従来のタッチプーリ３では、巻付け心線押さえ部５の半径（心線ガイド溝１７の溝底部での半径）ｒ1と、巻済み心線押さえ部６の半径ｒ1とは、等しい寸法に形成してある。
【０００５】
このようなタッチプーリ３を用いて、金型２に被せた補強材１の外周に心線４をスパイラル状に巻き付けるにあたっては、金型２に被せた補強材１の外周に供給される心線４を、タッチプーリ３の巻付け心線押さえ部５の心線ガイド溝１７に嵌合させてガイドしながら、金型２を図５の矢印のように回転駆動することによって、心線ガイド溝１７でガイドして位置決めした状態で補強材１の外周に心線４を巻き付けることができるものであり、同時に図４の矢印のようにタッチプーリ３を金型２と平行に移動させることによって、心線ガイド溝１７で心線１をガイドする位置を移動させ、スパイラル状に巻き付けることができるものである。
【０００６】
ここで、タッチプーリ３を金型２に被せた補強材１の外周に直接接触させず浮かせた状態で心線４の巻き付けを行なう方法もあるが、この方法では巻き付けられた心線４の並びが悪くなり、得られた伝動ベルトＴに埋入されている心線４の本数にばらつきが生じて、伝動ベルトＴの強度のばらつきが大きくなると共に、心線４同士が接触しているとベルト走行中に心線４間にストレスが生じて切断されるおそれがある。
【０００７】
このために、図４や図５に示すように、タッチプーリ３を金型２に被せた補強材１に押さえ付けた状態で、心線４の巻き付けを行なうようにしている。図４及び図５において、符号４ａは補強材１の外周にこれから巻き付けようとする心線４を示し、符号４ｂは補強材１の外周に既に巻き付けた巻付け済みの心線４を示すものであり、巻き付けようとする心線４ａは巻付け心線押さえ部５の心線ガイド溝１７で押さえ付けられて補強材１の外周に巻き付けられ、また補強材１の外周に巻付け済みの心線４ｂは巻済み心線押さえ部６で押さえられている。このように巻き付けようとする心線４ａと巻付け済みの心線４ｂがそれぞれタッチプーリ３で押さえ付けられた状態で巻き付けが行なわれるので、補強材１の外周での心線４の並びが良くなるのである。
【０００８】
【発明が解決しようとする課題】
上記のようにタッチプーリ３を金型２に被せた補強材１に押さえ付けることによって、並び良く心線４をスパイラルに巻き付けることができるが、この反面、タッチプーリ３による押圧力の作用で金型２に被せた補強材１にずれによるネジレが発生し易くなる。補強材１は帆布等を筒状にして付き合わせた端部同士を縫い合わせてあり、この縫い目１４は図３（ｂ）に示すように歯部１３の頂部に位置するように伝動ベルトＴを製造する必要があり、このためには縫い目１４が凹溝１１の位置にくるように補強材１を金型２に被せて、成形を行なう必要があるが、心線４を巻き付ける際に補強材１にずれが生じると、補強材１の縫い目１４が凹溝１１の位置からずれるおそれがあり、縫い目１４が歯部１３の頂部からずれて歯部１３間の谷部などの位置に縫い目１４が存在して、強度の上で問題がある伝動ベルトＴが製造されるおそれがあるのである。
【０００９】
ここで、心線４を巻き付ける際に補強材１にずれによるネジレが発生する原理を図５に基づいて説明する。
【００１０】
タッチプーリ３は自身では回転駆動されないものであり、図４や図５に示すように、補強材１の外周に既に巻き付けられている巻付け済みの心線４ｂに巻済み心線押さえ部６が圧接していることによって、金型２の回転駆動に従動してタッチプーリ３は図５の矢印のように回転されるものであり、補強材１の外周にこれから巻き付けようとする心線４ａは角度θの範囲で巻付け心線押さえ部５の心線ガイド溝１７に巻き掛けられている。そしてタッチプーリ３の外周のうち金型２に最も近い個所に接する心線４ａ，４ｂの表面上の点をＡ0とし、これから巻き付けようとする心線４ａがタッチプーリ３の巻付け心線押さえ部５の外周に角度θで巻き掛けられている範囲である円弧Ａ0Ｂ0をとり、さらに円弧Ａ0Ｂ0＝円弧Ａ0Ｃ0となるように点Ｃ0を巻付け済み心線４ｂの外側の表面上にプロットする。またタッチプーリ３の軸１５と点Ａ0を結ぶ直線の延長線とこれから巻き付けようとする心線４ａのピッチラインｐとの交点と、金型２の回転軸１６と点Ａ0を結ぶ直線と巻付け済みの心線４ｂのピッチラインｐとの交点は図５において一致するので、それぞれ点Ａ1としてプロットし、さらにタッチプーリ３の軸１５と点Ｂ0を結ぶ直線の延長線とこれから巻き付けようとする心線４ａのピッチラインｐとの交点を点Ｂ1としてプロットすると共に、金型２の回転軸１６と点Ｃ0を結ぶ直線と巻付け済みの心線４ｂのピッチラインｐとの交点をＣ1としてプロットする。尚、心線４のピッチラインｐは心線４のほぼ中心にある。
【００１１】
タッチプーリ３の巻付け心線押さえ部５の半径ｒ1と巻済み心線押さえ部６の半径ｒ1は等しいので、タッチプーリ３と心線４の間で滑りがなければ、金型２の回転駆動に伴って回転される巻付け済み心線４ｂの外側表面の速度とタッチプーリ３の巻付け心線押さえ部５の外周表面の速度は等しくなり、従って巻付け心線押さえ部５に接するこれから巻き付けようとする心線４ａの内側表面の速度と巻付け済み心線４ｂの外側表面の速度は等しくなる。すなわち、［巻き付けようとする心線４ａの内側表面の送り速度：巻付け済み心線４ｂの外側表面の送り速度＝円弧Ａ0Ｂ0：円弧Ａ0Ｃ0］であり、円弧Ａ0Ｂ0＝円弧Ａ0Ｃ0である。
【００１２】
ここで、巻き付けようとする心線４ａの送り速度と巻付け済み心線４ｂの送り速度を、心線４の真の長さであるピッチラインｐについて比較をすると、［巻き付けようとする心線４ａの送り速度：巻付け済み心線４ｂの送り速度＝円弧Ａ1Ｂ1：円弧Ａ1Ｃ1］である。そして心線４の厚み（直径）をｔ、金型２に補強材１の厚みを加えた金型２の中心の回転軸１６から補強材１の外周までの半径をｒ2とすると、円弧Ａ1Ｂ1／円弧Ａ0Ｂ0＝（ｒ1＋０．５ｔ）／ｒ1であり、円弧Ａ1Ｃ1／円弧Ａ0Ｃ0＝（ｒ2＋０．５ｔ）／（ｒ2＋ｔ）である。上記のように円弧Ａ0Ｂ0＝円弧Ａ0Ｃ0であるから、［巻き付けようとする心線４ａの送り速度：巻付け済み心線４ｂの送り速度＝円弧Ａ1Ｂ1：円弧Ａ1Ｃ1＝（ｒ1＋０．５ｔ）／ｒ1：（ｒ2＋０．５ｔ）／（ｒ2＋ｔ）］の関係になる。一般にｒ2はｒ1より大であるので、（ｒ1＋０．５ｔ）／ｒ1＞（ｒ2＋０．５ｔ）／（ｒ2＋ｔ）であり、従って円弧Ａ1Ｂ1＞円弧Ａ1Ｃ1である。よって、巻き付けようとする心線４ａの送り速度は巻付け済み心線４ｂの送り速度より常に速くなる。
【００１３】
このように、巻き付けようとする心線４ａの送り速度が巻付け済み心線４ｂの送り速度より速いと、送り込まれる心線４ａはその長さが送り込まれた心線４ｂより大きいため、巻き付けようとする心線４ａは送り終わった方向、すなわち金型２の回転方向へ逃げ、この結果、金型２の回転方向に補強材１がずれてネジレが発生するのである。
【００１４】
本発明は上記の点に鑑みてなされたものであり、タッチプーリで押さえ付けながら心線を巻き付けるにあたって、補強材がずれてネジレるようなことなく、心線を補強材の外周に巻き付けることができる伝動ベルト成形用心線巻付け装置を提供することを目的とするものである。
【００１５】
【課題を解決するための手段】
本発明は、補強材１を外周に被せた伝動ベルト成形用の金型２と、金型２に被せた補強材１の外周に接して回転自在で且つ金型２の軸方向に沿って移動駆動されるタッチプーリ３とを備えて成り、金型２に被せた補強材１の外周に供給される心線４をタッチプーリ３の外周面で押さえながら金型２を回転駆動させることによって、心線４を補強材１の外周にスパイラル状に巻き付けるようにした伝動ベルト成形用心線巻付け装置において、タッチプーリ３に、補強材１の外周に供給されて巻き付けられる心線４を押さえる巻付け心線押さえ部５と、補強材１の外周に巻き付け済みの心線４を押さえる巻済み心線押さえ部６を形成すると共に、巻済み心線押さえ部６の半径ｒ3を巻付け心線押さえ部５の半径ｒ1よりも大きく形成して成ることを特徴とするものである。
【００１６】
また請求項２の発明は、タッチプーリ３の巻付け心線押さえ部５の半径をｒ1、巻済み心線押え部６の半径をｒ3、補強材１の厚みも含めた金型の半径をｒ2、心線４の厚みをｔとすると、巻済み心線押え部６の半径ｒ3と巻付け心線押さえ部５の半径ｒ1の差ｄを、
ｄ＝Ａ×（０．５ｔ（ｒ1＋ｒ2）／ｒ2）
（ただし、Ａは０．１〜０．７の係数）
に設定することを特徴とするものである。
【００１７】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。
【００１８】
図１及び図２は本発明の実施の形態の一例を示すものであり、タッチプーリ３は円柱状（あるいは円筒状）に形成されるものであって、軸１５を中心にして回転自在にしてある。またタッチプーリ３は軸方向の一方の端部を巻付け心線押さえ部５として、軸方向の他の部分を巻済み心線押さえ部６として一体に形成してあり、巻付け心線押さえ部５の外周には心線ガイド溝１７が凹設してある。そしてこのタッチプーリ３において、巻付け心線押さえ部５の半径（心線ガイド溝１７の溝底部での半径）ｒ1よりも、巻済み心線押さえ部６の半径ｒ3を大きい寸法に形成してある。
【００１９】
また金型２は既述のように、外周に歯部成形用の凹溝１１を軸方向と並行に多数本設けて形成した円筒体（あるいは円柱体）で形成されるものであり、回転軸１６を中心にして回転駆動されるようになっている。タッチプーリ３はこの金型２の外周部に軸１５，１６が平行になるように配置されるものであり、金型２の軸方向と平行な方向に移動駆動されるようにしてある。
【００２０】
そしてこの金型２の外周には、帆布などのシート材を縫い合わせて筒状にした補強材１が被せられるものであり、金型２に被せたこの補強材１の外周に心線４をスパイラル状に巻き付けるにあたっては、心線４を補強材１の外周に供給し、タッチプーリ３の巻付け心線押さえ部５の心線ガイド溝１７で心線４をガイドしながら、金型２を図２の矢印方向のように回転駆動すると共にタッチプーリ３を金型２に対して図１の矢印のように平行に移動させることによって行なうことができる。また、タッチプーリ３には心線４を金型２に被せた補強材１に押さえ付ける押圧力が与えられており、これから巻き付けようとする心線４ａは巻付け心線押さえ部５の心線ガイド溝１７で押さえ付けられて補強材１の外周に巻き付けられると同時に、補強材１の外周に巻付け済みの心線４ｂは巻済み心線押さえ部６で押さえられているので、補強材１の外周での心線４の並びを良好なものとすることができる。
【００２１】
そして従来例の図５において説明したように、タッチプーリ３で押さえ付けながら金型２を回転駆動して心線４を補強材１の外周に巻き付ける際に、これから巻き付けようとする心線４ａの送り速度が、巻付け済み心線４ｂの送り速度より速いと、巻き付けられる心線４ａに補強材１が部分的に引かれて移動し、金型２の回転方向に補強材１がずれてネジレが発生する。従って、これから巻き付けようとする心線４ａの送り速度と、巻付け済み心線４ｂの送り速度が等しくなれば、送り込まれる心線４ａにの長さと送り込まれた心線４ｂの長さは等しくなり、巻き付けられる心線４ａに補強材１が部分的に引かれるようなことがなくなって、補強材１がずれてネジレることを防止することができる。
【００２２】
本発明ではタッチプーリ３の巻付け心線押さえ部５の半径ｒ1よりも、巻済み心線押さえ部６の半径ｒ3を大きい寸法に形成することによって、巻付け心線押さえ部５の外周と巻済み心線押さえ部６の外周での周速度に差を付け、巻付け心線押さえ部５で押さえながらこれから巻き付けようとする心線４ａの送り速度と、巻済み心線押さえ部６で押さえられている巻付け済み心線４ｂの送り速度を等しくすることができるようにしたものであり、この原理を図２に基づいて説明する。
【００２３】
図２においてＡ0，Ｂ0，Ｃ0，Ａ1，Ｂ1，Ｃ1はそれぞれ図５のものと同じである（ただし、Ａ0は巻き付けようとする心線４ａの表面上の点、Ａ1は巻き付けようとする心線４ａのピッチラインｐ上の点である）。また、巻済み心線押え部６の半径ｒ3は巻付け心線押え部５の半径ｒ1よりも大きく形成されているので、巻済み心線押え部６によって補強材１及び巻付け済み心線４ｂは圧縮されており、巻済み心線押さえ部６の外周のうち金型２に最も近い個所に接する巻済み心線４ｂの外側表面上の点をＡ3、金型２の回転軸１６と点Ａ3を結ぶ直線と巻付け済み心線４ｂのピッチラインｐ上の点をＡ5としてプロットする。そして図５の場合と同様に円弧Ａ0Ｂ0＝円弧Ａ0Ｃ0であり、巻付け済み心線４ｂは圧縮されているが、実質的に円弧Ａ0Ｃ0＝円弧Ａ3Ｃ0として差し支えない。そして円弧Ａ3Ｃ0＝円弧Ａ3Ｂ3となる点Ｂ3を巻済み心線押さえ部６の外周表面上にプロットし、さらにタッチプーリ３の中心である軸１５とＢ3を結ぶ直線が巻き付けようとする心線４ａのピッチラインｐと交わる点Ｂ4をプロットする。
【００２４】
ここで、既述のようにタッチプーリ３は自身では回転駆動されず、補強材１の外周に既に巻き付けられている巻付け済みの心線４ｂに巻済み心線押さえ部６が圧接していることによって、金型２の回転駆動に従動してタッチプーリ３は図２の矢印のように回転されるものである。そして円弧Ａ3Ｃ0＝円弧Ａ3Ｂ3であるから、金型２が図２の矢印のように回転駆動されて巻付け済み心線４ｂが送られ、巻付け済み心線４ｂの外周上の点Ｃ0が図２の点Ａ3に達するときには、巻付け心線押さえ部６の外周上の点Ｂ3が図２の点Ａ3に達するようにタッチプーリ３は回転されることになり、タッチプーリ３のこの回転に伴って巻付け心線押さえ部５によってこれから巻き付けようとする心線４ａが送られる。従ってこのときの、巻き付けようとする心線４ａの送り速度と、巻付け済み心線４ｂの送り速度を、心線４の真の長さであるピッチラインｐについて比較をすると、［巻き付けようとする心線４ａの送り速度：巻付け済み心線４ｂの送り速度＝円弧Ａ1Ｂ4：円弧Ａ5Ｃ1］の関係が成立する。図２から明らかなように、円弧Ａ1Ｂ4＜円弧Ａ1Ｂ1であり、実質的に円弧Ａ5Ｃ1＝円弧Ａ1Ｃ1であるので、従来の図５の［巻き付けようとする心線４ａの送り速度：巻付け済み心線４ｂの送り速度＝円弧Ａ1Ｂ1：円弧Ａ1Ｃ1］の関係の場合よりも、巻き付けようとする心線４ａの送り速度を遅くすることができる。従って、従来のような巻き付けようとする心線４ａの送り速度が巻付け済み心線４ｂの送り速度より速くなる状態を解消し、巻き付けようとする心線４ａの送り速度と巻付け済み心線４ｂの送り速度ができるだけ等しくなるようにすることが可能になり、補強材１がずれてネジレることを防止することが可能になるものである。
【００２５】
次に、補強材１がずれてネジレることを防止するために必要な、タッチプーリ３における巻付け心線押さえ部５の半径ｒ1と巻済み心線押さえ部６の半径ｒ3の差ｄを、図２に基づいて求める。すなわち、上記の［巻き付けようとする心線４ａの送り速度：巻付け済み心線４ｂの送り速度＝円弧Ａ1Ｂ4：円弧Ａ5Ｃ1］の関係から、円弧Ａ1Ｂ4＝円弧Ａ5Ｃ1であれば、巻き付けようとする心線４ａの速度と巻付け済み心線４ｂの速度は等しくなり、補強材１がずれてネジレることを防止することができる。従って、円弧Ａ1Ｂ4＝円弧Ａ5Ｃ1にするために必要な条件として、巻付け心線押さえ部５の半径ｒ1と巻済み心線押さえ部６の半径ｒ3の差ｄを求めればよい。
【００２６】
しかして図２において、円弧Ａ5Ｃ1／円弧Ａ3Ｃ0＝（ｒ2＋０．５ｔ）／（ｒ2＋ｔ）である（巻付け済み心線４ｂは圧縮されているが、両辺は実質的にイコールとして差し支えない）。また円弧Ａ1Ｂ4／円弧Ａ3Ｂ3＝（ｒ1＋０．５ｔ）／ｒ3＝（ｒ1＋０．５ｔ）／（ｒ1＋ｄ）である。円弧Ａ3Ｃ0＝円弧Ａ3Ｂ3であるから、円弧Ａ1Ｂ4：円弧Ａ5Ｃ1＝（ｒ1＋０．５ｔ）／（ｒ1＋ｄ）：（ｒ2＋０．５ｔ）／（ｒ2＋ｔ）となる。そして円弧Ａ1Ｂ4＝円弧Ａ5Ｃ1を成立させる条件は、（ｒ1＋０．５ｔ）／（ｒ1＋ｄ）＝（ｒ2＋０．５ｔ）／（ｒ2＋ｔ）である。この等式を展開すると、ｄ＝０．５ｔ（ｒ1＋ｒ2＋ｔ）／（ｒ2＋０．５ｔ）となる。ｔはｒ1やｒ2よりも十分に小さいのでｒ1＋ｒ2＋ｔ≒ｒ1＋ｒ2、ｒ2＋０．５ｔ≒ｒ2とすることができる。従って、ｄ＝０．５ｔ（ｒ1＋ｒ2）／ｒ2を得ることができる。
【００２７】
このように、補強材１がずれてネジレることを防止するために必要な、タッチプーリ３における巻付け心線押さえ部５の半径ｒ1と巻済み心線押さえ部６の半径ｒ3の差ｄは、
ｄ＝０．５ｔ（ｒ1＋ｒ2）／ｒ2 …（１）
として求めることができる。しかし実際には、心線４とタッチプーリ３との間の滑り、補強材１の圧縮変形による心線４の沈みなどが複雑に影響し、さらに補強材１がタッチプーリ３による押圧力でタクレて金型２の回転と逆方向にずれるタクレの現象があるので、理論的に得られる上記の式（１）に係数をかけて補正する必要がある。タクレの現象は、図６に示すように、金型２の外周に被せた補強材１にこれから巻き付けようとする心線４ａを介してタッチプーリ３の押圧力が作用すると、この押圧力で補強材１が金型２の表面から部分的に浮いて金型２の回転方向と反対方向に押されてずれることによって生じるものであり、心線４を補強材１の外周に巻き付ける際に発生するずれによって補強材１が金型２の回転方向にベジレるのとは反対向きのずれである。従って、上記の式（１）に１以下の係数Ａをかけて得られる
ｄ＝Ａ×（０．５ｔ（ｒ1＋ｒ2）／ｒ2） …（２）
が実用的に採用されるものである。この係数Ａは補強材１や心線４の材質等に応じて異なるが、実機による試験から経験的に０．１〜０．７であると求められている。
【００２８】
ここで、歯数１０６、歯形ＭＹ、ベルト幅２５ｍｍの歯付ベルトを製造するにあたって、ｒ1＝７０ｍｍ、ｒ2＝１３５ｍｍ、ｔ＝１．２０ｍｍであるとき、これらの数値を代入して式（１）からｄを求めると、ｄ＝０．９ｍｍとなるが、これに係数Ａ＝０．１〜０．７をかけると、ｄ＝０．０９ｍｍ〜０．６３ｍｍとなる。従って、巻付け心線押さえ部５の半径ｒ1が７０ｍｍのタッチプーリ３の場合、巻済み心線押さえ部の半径ｒ3を７０．０９ｍｍ〜７０．６３ｍｍの間に形成することによって、補強材１がずれてネジレるようなことを確実に防止しながら、心線４の巻き付けを行なうことができるものである。
【００２９】
尚、本発明では上記のようにタッチプーリ３の巻済み心線押さえ部６の半径ｒ3を巻付け心線押さえ部５の半径ｒ1より大きくなるように形成しているため、巻付け済み心線４ｂに対する巻済み心線押さえ部６の押圧力が弱いと、巻付け心線押さえ部５が巻き付けようとする心線４ａから浮いて、補強材１の外周に巻き付けられた心線４の並びが悪くなるおそれがある。このために、タッチプーリ３に付加的な押圧力を与え、巻付け済み心線４ｂや補強材１を巻済み心線押さえ部６で圧縮させるようにして、巻付け心線押さえ部５で巻き付けようとする心線４ａを押さえ付けることができるようにする必要がある。このようにタッチプーリ３を強く押圧させるようにしても、金属材料で形成されるタッチプーリ３において巻付け心線押さえ部５の半径ｒ1と巻済み心線押さえ部６の半径ｒ3の比率は変わらないので、補強材１がずれてネジレることを防ぐ効果に影響はない。また心線４や補強材１は繊維材料で形成されるので、タッチプーリ３で一時的に押圧されて圧縮変形しても、伝動ベルトＴの性能には何ら問題は生じない。
【００３０】
【発明の効果】
上記のように本発明は、補強材を外周に被せた伝動ベルト成形用の金型と、金型に被せた補強材の外周に接して回転自在で且つ金型の軸方向に沿って移動駆動されるタッチプーリとを備えて成り、金型に被せた補強材の外周に供給される心線をタッチプーリの外周面で押さえながら金型を回転駆動させることによって、心線を補強材の外周にスパイラル状に巻き付けるようにした伝動ベルト成形用心線巻付け装置において、タッチプーリに、補強材の外周に供給されて巻き付けられる心線を押さえる巻付け心線押さえ部と、補強材の外周に巻き付け済みの心線を押さえる巻済み心線押さえ部を形成するようにしたので、これから巻き付けようとする心線と巻付け済みの心線をそれぞれ押さえた状態で心線を巻き付けることができ、補強材の外周での心線の並びを良好なものとすることができるものである。しかも巻済み心線押さえ部の半径を巻付け心線押さえ部の半径よりも大きく形成するようにしたので、巻付け心線押さえ部の外周と巻済み心線押さえ部の外周での周速度に差を付け、巻付け心線押さえ部で押さえながらこれから巻き付けようとする心線の送り速度と、巻済み心線押さえ部で押さえられている巻付け済み心線の送り速度が等しくなるようにすることができ、巻き付けようとする心線の速度が巻付け済み心線の速度より速いことによって生じる補強材のずれによるネジレを防止しながら、心線を補強材の外周に巻き付けることができるものである。
【図面の簡単な説明】
【図１】本発明の実施の形態の一例を示す一部の正面図である。
【図２】同上の一部の側面図である。
【図３】（ａ）は伝動ベルトの製造の工程の一例を示す側面断面図、（ｂ）は伝動ベルトの一部を示す拡大した斜視図である。
【図４】従来例を示す一部の正面図である。
【図５】同上の一部の側面図である。
【図６】タクレの現象を示す一部の側面図である。
【符号の説明】
１ 補強材
２ 金型
３ タッチプーリ
４ 心線
５ 巻付け心線押さえ部
６ 巻済み心線押さえ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus used for winding a core wire around a molding die when a power transmission belt having a core wire embedded in the longitudinal direction of the belt, such as a toothed belt, is formed.
[0002]
[Prior art]
In manufacturing a transmission belt such as a toothed belt, for example, it is performed as follows. That is, as shown in FIG. 3 (a), a cylindrical mold 2 formed by providing a large number of concave grooves 11 for forming tooth portions on the outer periphery in parallel with the axial direction is used. A reinforcing material 1 made of a sheet material such as canvas is covered with a tubular material, and then a core wire 4 is spirally wound around the outer periphery of the reinforcing material 1 covered with a mold 2. Thereafter, an unvulcanized rubber sheet 12 is wound around the outer periphery of the reinforcing material 1 from above the core wire 4, and this is heated and pressurized to vulcanize to form a cylindrical sleeve. Then, by cutting the sleeve so as to be cut in a circle, tooth portions 13 whose surfaces are reinforced with the reinforcing material 1 are formed at a predetermined pitch as shown in FIG. 3B, and a plurality of core wires 4 are formed. The transmission belt T embedded in the longitudinal direction of the belt can be obtained.
[0003]
Here, in order to wrap the core wire 4 in a spiral shape around the outer periphery of the reinforcing material 1 placed on the mold 2 as described above, the touch pulley 3 is used as provided in Japanese Patent Publication No. 6-92133. Has been. The touch pulley 3 is formed in a columnar shape, and is rotatable about the shaft 15. The touch pulley 3 is arranged on the outer periphery of the mold 2 so that the shaft 15 is parallel to the rotation shaft 16 of the mold 2 to be rotationally driven, and is moved and driven in parallel with the axial direction of the mold 2. It is made to do.
[0004]
4 and 5 show an example of a conventional touch pulley 3. One end in the axial direction is a wound core pressing part 5, and the other axial part is a wound core pressing part 6. FIG. Respectively. A core wire guide groove 17 is recessed in the outer periphery of the winding core wire pressing portion 5. In the figure, the two core wire guide grooves 17 are recessed to be used for two-strand winding in which a pair of S-strand and Z-strand core wires 4 are wound simultaneously. Uses the touch pulley 3 in which one core guide groove 17 is recessed. Then, in the conventional Tatchipuri 3, the r 1 (radius at the groove bottom portion of the core wire guide grooves 17) wound cord pressing portion 5 of the radius, and the radius r 1 of the winding already cord pressing portion 6, equal size It is formed.
[0005]
When the core wire 4 is spirally wound around the outer periphery of the reinforcing material 1 placed on the mold 2 using such a touch pulley 3, the core wire 4 supplied to the outer periphery of the reinforcing material 1 placed on the die 2 is used. The core 2 is rotated and driven as indicated by the arrow in FIG. 5 while being guided by being fitted into the core guide groove 17 of the winding core holder 5 of the touch pulley 3. The core wire 4 can be wound around the outer periphery of the reinforcing member 1 while being guided and positioned. At the same time, the touch pulley 3 is moved in parallel with the mold 2 as indicated by the arrows in FIG. The position where the core wire 1 is guided by the groove 17 can be moved and wound in a spiral shape.
[0006]
Here, there is a method of winding the core wire 4 in a state where the touch pulley 3 is floated without being directly in contact with the outer periphery of the reinforcing material 1 placed on the mold 2, but in this method, the array of the wound core wires 4 is arranged. When the number of the core wires 4 embedded in the obtained transmission belt T is deteriorated, the strength of the transmission belt T is increased, and when the core wires 4 are in contact with each other, the belt travels. There is a possibility that stress is generated between the core wires 4 and the wires are cut.
[0007]
For this purpose, as shown in FIGS. 4 and 5, the core wire 4 is wound in a state where the touch pulley 3 is pressed against the reinforcing member 1 placed on the mold 2. 4 and 5, reference numeral 4 a indicates the core 4 to be wound around the outer periphery of the reinforcing member 1, and reference numeral 4 b indicates the wound core 4 that has already been wound around the outer periphery of the reinforcing member 1. The core wire 4a to be wound is pressed by the core wire guide groove 17 of the winding core wire pressing portion 5 and wound around the outer periphery of the reinforcing member 1, and the core wire wound around the outer periphery of the reinforcing member 1 4 b is pressed by the wound core wire pressing portion 6. Since winding is performed in a state where the core wire 4a to be wound and the wound core wire 4b are pressed by the touch pulley 3, the alignment of the core wires 4 on the outer periphery of the reinforcing member 1 is improved. It is.
[0008]
[Problems to be solved by the invention]
By pressing the touch pulley 3 against the reinforcing material 1 placed on the mold 2 as described above, the core wires 4 can be wound around the spiral well, but on the other hand, the mold 2 is pressed by the action of the pressing force by the touch pulley 3. It becomes easy to generate the twist by the shift | offset | difference to the reinforcing material 1 covered. The reinforcing material 1 is produced by sewing the end portions of the canvas, which are joined together in a cylindrical shape, and the transmission belt T is manufactured so that the seam 14 is located at the top of the tooth portion 13 as shown in FIG. For this purpose, it is necessary to cover the reinforcing material 1 with the mold 2 so that the seam 14 is located at the position of the concave groove 11 and to perform molding. However, when the core wire 4 is wound, the reinforcing material 1 If the slippage occurs, the seam 14 of the reinforcing member 1 may be displaced from the position of the groove 11, and the seam 14 is displaced from the top of the tooth portion 13, and the seam 14 exists at a position such as a valley between the tooth portions 13. As a result, the transmission belt T having a problem in strength may be manufactured.
[0009]
Here, the principle of twisting of the reinforcing material 1 when the core wire 4 is wound will be described with reference to FIG.
[0010]
The touch pulley 3 is not rotationally driven by itself, and as shown in FIGS. 4 and 5, the wound core wire pressing portion 6 is pressed against the wound core wire 4 b that is already wound around the outer periphery of the reinforcing member 1. Accordingly, the touch pulley 3 is rotated as indicated by the arrow in FIG. 5 following the rotational drive of the mold 2, and the core wire 4 a to be wound around the outer periphery of the reinforcing member 1 has an angle θ Is wound around the core wire guide groove 17 of the winding core wire pressing portion 5. A point on the surface of the core wires 4 a and 4 b that are in contact with the portion closest to the mold 2 on the outer periphery of the touch pulley 3 is A 0 , and the core wire 4 a to be wound from now on is the winding core wire pressing portion 5 of the touch pulley 3. An arc A 0 B 0 which is a range wound around the outer circumference of the arc is taken as an arc A 0 B 0 , and further, the point C 0 is wound outside the wound core 4b so that the arc A 0 B 0 = the arc A 0 C 0 Plot on the surface of. Also, the intersection of the extension line of the straight line connecting the axis 15 of the touch pulley 3 and the point A 0 and the pitch line p of the core wire 4a to be wound from now on, and the straight line connecting the rotation axis 16 of the mold 2 and the point A 0 are wound. Since the intersections of the attached core wire 4b and the pitch line p coincide with each other in FIG. 5, they are plotted as a point A 1 , and a straight line extending from the axis 15 of the touch pulley 3 to the point B 0 and an attempt to wrap from now on. The intersection of the core wire 4a with the pitch line p is plotted as a point B 1 , and the intersection of the straight line connecting the rotation axis 16 and the point C 0 of the mold 2 with the pitch line p of the wound core wire 4b is plotted. Plot as C 1 . The pitch line p of the core wire 4 is substantially at the center of the core wire 4.
[0011]
Since the radius r 1 and the radius r 1 of the winding already cord holding portion 6 of the winding core wire holding portion 5 of Tatchipuri 3 are equal, if there is no slip between the Tatchipuri 3 and core wires 4, the die 2 rotates drive Accordingly, the speed of the outer surface of the wound core wire 4b rotated along with the speed of the outer peripheral surface of the wound core wire pressing portion 5 of the touch pulley 3 becomes equal. The speed of the inner surface of the core wire 4a is equal to the speed of the outer surface of the wound core wire 4b. That is, [feed speed of the inner surface of the core 4a to be wound: feed speed of the outer surface of the wound core 4b = arc A 0 B 0 : arc A 0 C 0 ], and arc A 0 B 0 = Arc A 0 C 0
[0012]
Here, when the feed speed of the core wire 4a to be wound and the feed speed of the wound core wire 4b are compared with respect to the pitch line p, which is the true length of the core wire 4, [core wire to be wound] 4a feed speed: feed speed of the wound core wire 4b = arc A 1 B 1 : arc A 1 C 1 ]. When the thickness (diameter) of the core wire 4 is t and the radius from the rotation shaft 16 at the center of the mold 2 obtained by adding the thickness of the reinforcement 1 to the mold 2 to the outer periphery of the reinforcement 1 is r 2 , the arc A 1 B 1 / arc A 0 B 0 = (r 1 +0.5 t) / r 1 , and arc A 1 C 1 / arc A 0 C 0 = (r 2 +0.5 t) / (r 2 + t) . Since arc A 0 B 0 = arc A 0 C 0 as described above, [feed speed of core 4a to be wound: feed speed of wound core 4b = arc A 1 B 1 : arc A 1 C 1 = (r 1 +0.5 t) / r 1 : (r 2 +0.5 t) / (r 2 + t)]. Since r 2 is generally greater than r 1 , (r 1 +0.5 t) / r 1 > (r 2 +0.5 t) / (r 2 + t), and therefore arc A 1 B 1 > arc A 1 C 1 . Therefore, the feed speed of the core wire 4a to be wound is always higher than the feed speed of the wound core wire 4b.
[0013]
Thus, if the feeding speed of the core wire 4a to be wound is higher than the feeding speed of the wound core wire 4b, the length of the core wire 4a to be fed is larger than that of the fed core wire 4b. The core wire 4a escapes in the direction in which the feeding is completed, that is, in the rotational direction of the mold 2, and as a result, the reinforcing material 1 is displaced in the rotational direction of the mold 2 and twisting occurs.
[0014]
The present invention has been made in view of the above points, and when winding a core wire while pressing with a touch pulley, the core wire can be wound around the outer periphery of the reinforcing material without causing the reinforcing material to shift and twist. An object of the present invention is to provide a core winding device for forming a transmission belt.
[0015]
[Means for Solving the Problems]
The present invention includes a mold 2 for forming a transmission belt with a reinforcing material 1 placed on the outer periphery thereof, and is rotatable in contact with the outer periphery of the reinforcing material 1 covered with the die 2 and moved along the axial direction of the die 2. A touch pulley 3 that is driven, and by rotating the mold 2 while pressing the core wire 4 that is supplied to the outer periphery of the reinforcing material 1 covered on the mold 2 with the outer peripheral surface of the touch pulley 3, In a core winding device for forming a transmission belt in which a belt 4 is wound around the outer periphery of a reinforcing material 1, a winding core wire presser for pressing the core wire 4 that is supplied to the outer periphery of the reinforcing material 1 and wound around the touch pulley 3. The wound core wire pressing portion 6 that presses the wound core wire 4 around the outer periphery of the reinforcing member 1 is formed, and the radius r 3 of the wound core wire pressing portion 6 is set to Formed larger than the radius r 1 It is a feature.
[0016]
In the invention of claim 2, the radius of the winding core wire pressing portion 5 of the touch pulley 3 is r 1 , the radius of the wound core wire pressing portion 6 is r 3 , and the radius of the mold including the thickness of the reinforcing material 1 is set. When r 2 and the thickness of the core wire 4 are t, the difference d between the radius r 3 of the wound core wire retainer 6 and the radius r 1 of the wound core wire retainer 5 is
d = A × (0.5t (r 1 + r 2 ) / r 2 )
(However, A is a coefficient of 0.1 to 0.7)
It is characterized by being set to.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0018]
1 and 2 show an example of an embodiment of the present invention, and the touch pulley 3 is formed in a columnar shape (or a cylindrical shape) and is rotatable around a shaft 15. . Further, the touch pulley 3 is integrally formed with one end portion in the axial direction as a wound core wire pressing portion 5 and the other portion in the axial direction as a wound core wire pressing portion 6. A core wire guide groove 17 is recessed in the outer periphery of the wire. And in this Tatchipuri 3, winding cord than r 1 (radius at the groove bottom portion of the core wire guide grooves 17) pressing portion 5 of the radius, forming a radius r 3 of the winding already cord pressing portion 6 to a larger size It is.
[0019]
In addition, as described above, the mold 2 is formed of a cylindrical body (or a columnar body) formed by providing a large number of concave grooves 11 for forming tooth portions on the outer periphery in parallel with the axial direction. 16 is driven to rotate. The touch pulley 3 is arranged on the outer periphery of the mold 2 so that the shafts 15 and 16 are parallel to each other, and is moved and driven in a direction parallel to the axial direction of the mold 2.
[0020]
The outer periphery of the mold 2 is covered with a reinforcing material 1 formed by sewing a sheet material such as a canvas into a cylindrical shape, and a cord 4 is spirally wound around the outer periphery of the reinforcing material 1 covered with the mold 2. When winding in the shape, the core wire 4 is supplied to the outer periphery of the reinforcing member 1, and the core wire 4 is guided by the core wire guide groove 17 of the winding core wire pressing portion 5 of the touch pulley 3, while the mold 2 is shown in FIG. 1 and the touch pulley 3 can be moved parallel to the mold 2 as indicated by the arrows in FIG. The touch pulley 3 is given a pressing force for pressing the core wire 4 against the reinforcing member 1 placed on the mold 2, and the core wire 4 a to be wound from now on is a core guide for the wound core wire presser 5. Since the core wire 4 b wound around the outer periphery of the reinforcing material 1 is pressed by the wound core wire pressing portion 6 at the same time as being pressed by the groove 17 and wound around the outer periphery of the reinforcing material 1, The arrangement of the cores 4 on the outer periphery can be made favorable.
[0021]
Then, as described with reference to FIG. 5 of the conventional example, when the core wire 4 is wound around the outer periphery of the reinforcing member 1 by rotating the mold 2 while being pressed by the touch pulley 3, the core wire 4a to be wound is sent. When the speed is faster than the feeding speed of the wound core wire 4b, the reinforcing material 1 is partially pulled and moved by the wound core wire 4a, and the reinforcing material 1 is displaced in the rotational direction of the mold 2 to cause twisting. appear. Therefore, if the feeding speed of the core 4a to be wound is equal to the feeding speed of the wound core 4b, the length of the core 4a to be fed is equal to the length of the core 4b to be fed. The reinforcing material 1 is not partially pulled around the wound core wire 4a, and it is possible to prevent the reinforcing material 1 from being displaced and twisted.
[0022]
Than the radius r 1 of the winding core wire holding portion 5 of Tatchipuri 3 in the present invention, by forming the radius r 3 of the winding already cord pressing portion 6 in large dimensions, and the outer periphery of the winding core wire pressing portion 5 A difference is made in the peripheral speed on the outer periphery of the wound core wire pressing part 6, and the feeding speed of the core wire 4 a to be wound from now on while pressing the wound core wire pressing part 5, and pressing by the wound core wire pressing part 6 The feeding speed of the wound core wire 4b is made equal, and this principle will be described with reference to FIG.
[0023]
2, A 0 , B 0 , C 0 , A 1 , B 1 , C 1 are the same as those in FIG. 5 (where A 0 is a point on the surface of the core 4a to be wound, A 1 is a point on the pitch line p of the core 4a to be wound). Further, since the radius r 3 of the wound core wire presser 6 is formed larger than the radius r 1 of the wound core wire presser 5, the reinforcing material 1 and the wound core are wound by the wound core wire presser 6. The wire 4b is compressed, and the point on the outer surface of the wound core wire 4b that contacts the portion closest to the mold 2 in the outer periphery of the wound core wire pressing portion 6 is A 3 , and the rotating shaft 16 of the mold 2 plotted as a 5 points on the pitch line p lines and winding pre cord 4b connecting the preparative point a 3. As in the case of FIG. 5, arc A 0 B 0 = arc A 0 C 0 and the wound core wire 4b is compressed, but substantially arc A 0 C 0 = arc A 3 C 0 There is no problem. Then, a point B 3 where arc A 3 C 0 = arc A 3 B 3 is plotted on the outer peripheral surface of the wound core wire holding part 6, and a straight line connecting the axis 15 and B 3 which is the center of the touch pulley 3 is wound. A point B 4 that intersects the pitch line p of the core 4a to be plotted is plotted.
[0024]
Here, as described above, the touch pulley 3 is not driven to rotate by itself, and the wound core wire pressing portion 6 is in pressure contact with the wound core wire 4b that is already wound around the outer periphery of the reinforcing member 1. Thus, the touch pulley 3 is rotated as indicated by the arrow in FIG. Since arc A 3 C 0 = arc A 3 B 3 , the mold 2 is driven to rotate as indicated by the arrow in FIG. 2 to send the wound core wire 4b, and on the outer periphery of the wound core wire 4b. When the point C 0 reaches the point A 3 in FIG. 2, the touch pulley 3 is rotated so that the point B 3 on the outer periphery of the winding core wire pressing part 6 reaches the point A 3 in FIG. Along with this rotation of the touch pulley 3, the core wire 4 a to be wound is sent by the winding core wire pressing portion 5. Therefore, when the feed speed of the core wire 4a to be wound at this time and the feed speed of the wound core wire 4b are compared with respect to the pitch line p which is the true length of the core wire 4, The feed rate of the core wire 4a: The feed rate of the wound core wire 4b = arc A 1 B 4 : arc A 5 C 1 ] is established. As apparent from FIG. 2, arc A 1 B 4 <arc A 1 B 1 , and arc A 5 C 1 = arc A 1 C 1 is substantially satisfied. The feeding speed of the core 4a: the feeding speed of the wound core 4b = the arc A 1 B 1 : the arc A 1 C 1 ]. Can do. Therefore, the state where the feed speed of the core wire 4a to be wound is higher than the feed speed of the wound core wire 4b as in the prior art is eliminated, and the feed speed of the core wire 4a to be wound and the wound core wire are eliminated. It becomes possible to make the feed speeds of 4b as equal as possible, and it is possible to prevent the reinforcing material 1 from being displaced and twisted.
[0025]
Then, necessary to prevent the twisting that reinforcement 1 is displaced, the difference d of the radius r 1 and the radius r 3 of the winding already cord holding portion 6 of the winding core wire holding portion 5 in Tatchipuri 3 Based on FIG. That is, arc A 1 B 4 = arc A from the above relationship [feed speed of core 4a to be wound: feed speed of wound core 4b = arc A 1 B 4 : arc A 5 C 1 ] If it is 5 C 1 , the speed of the core wire 4a to be wound is equal to the speed of the wound core wire 4b, and the reinforcing material 1 can be prevented from being displaced and twisted. Accordingly, as a necessary condition for setting the arc A 1 B 4 = arc A 5 C 1 , a difference d between the radius r 1 of the wound core wire pressing portion 5 and the radius r 3 of the wound core wire pressing portion 6 can be obtained. That's fine.
[0026]
In FIG. 2, arc A 5 C 1 / arc A 3 C 0 = (r 2 +0.5 t) / (r 2 + t) (the wound core 4b is compressed, but both sides are substantially It may be equally equal). Further, arc A 1 B 4 / arc A 3 B 3 = (r 1 +0.5 t) / r 3 = (r 1 +0.5 t) / (r 1 + d). Since arc A 3 C 0 = arc A 3 B 3 , arc A 1 B 4 : arc A 5 C 1 = (r 1 +0.5 t) / (r 1 + d) :( r 2 +0.5 t) / ( r 2 + t). The condition for establishing arc A 1 B 4 = arc A 5 C 1 is (r 1 +0.5 t) / (r 1 + d) = (r 2 +0.5 t) / (r 2 + t). When this equation is expanded, d = 0.5t (r 1 + r 2 + t) / (r 2 + 0.5t). Since t is sufficiently smaller than r 1 and r 2 , r 1 + r 2 + t≈r 1 + r 2 and r 2 + 0.5t≈r 2 can be obtained. Therefore, d = 0.5t (r 1 + r 2 ) / r 2 can be obtained.
[0027]
Thus, necessary to prevent the twisting that reinforcement 1 is displaced, the difference between the radius r 1 and the radius r 3 of the winding already cord holding portion 6 of the winding core wire holding portion 5 in Tatchipuri 3 d Is
d = 0.5t (r 1 + r 2 ) / r 2 (1)
Can be obtained as In reality, however, slippage between the core wire 4 and the touch pulley 3, sinking of the core wire 4 due to compression deformation of the reinforcing material 1, and the like are complicatedly affected. Since there is a tangled phenomenon that deviates in the opposite direction to the rotation of the mold 2, it is necessary to correct the above equation (1) obtained theoretically by applying a coefficient. As shown in FIG. 6, when the pressing force of the touch pulley 3 acts on the reinforcing material 1 covered on the outer periphery of the mold 2 via the core wire 4a to be wound from now on, the tackle phenomenon is caused by the pressing force. 1 is caused by partially floating from the surface of the mold 2 and being pushed and shifted in the direction opposite to the rotation direction of the mold 2, and a shift that occurs when the core 4 is wound around the outer periphery of the reinforcing material 1. Therefore, the reinforcing material 1 is displaced in the direction opposite to the direction in which the reinforcing material 1 bends in the rotational direction of the mold 2. Therefore, d = A × (0.5t (r 1 + r 2 ) / r 2 ) (2) obtained by multiplying the above equation (1) by a coefficient A of 1 or less.
Is practically adopted. The coefficient A varies depending on the material of the reinforcing material 1 and the core wire 4, but is empirically determined to be 0.1 to 0.7 from a test using an actual machine.
[0028]
Here, when manufacturing a toothed belt having a number of teeth of 106, a tooth profile MY, and a belt width of 25 mm, when r 1 = 70 mm, r 2 = 135 mm, and t = 1.20 mm, these numerical values are substituted to obtain an equation ( When d is obtained from 1), d = 0.9 mm, and when this is multiplied by a coefficient A = 0.1 to 0.7, d = 0.09 mm to 0.63 mm. Therefore, in the case of the touch pulley 3 in which the radius r 1 of the wound core wire pressing portion 5 is 70 mm, the reinforcing material 1 is formed by forming the radius r 3 of the wound core wire pressing portion between 70.09 mm and 70.63 mm. The core wire 4 can be wound while reliably preventing the twisting and twisting.
[0029]
In the present invention, as described above, the radius r 3 of the wound core wire pressing portion 6 of the touch pulley 3 is formed to be larger than the radius r 1 of the wound core wire pressing portion 5. When the pressing force of the wound core wire pressing portion 6 against the wire 4b is weak, the wound core wire pressing portion 5 floats from the core wire 4a to be wound, and the core wires 4 wound around the outer periphery of the reinforcing member 1 are arranged. May get worse. For this purpose, an additional pressing force is applied to the touch pulley 3 so that the wound core wire 4b and the reinforcing material 1 are compressed by the wound core wire pressing portion 6 and wound by the wound core wire pressing portion 5. It is necessary to be able to hold down the core wire 4a. Also in this manner so as to strongly press Tatchipuri 3, the ratio of the radius r 1 and the radius r 3 of the winding already cord holding portion 6 of the winding core wire holding portion 5 in Tatchipuri 3 formed of a metal material same As a result, there is no effect on the effect of preventing the reinforcing member 1 from shifting and twisting. Further, since the core wire 4 and the reinforcing material 1 are made of a fiber material, there is no problem in the performance of the transmission belt T even if it is temporarily pressed by the touch pulley 3 and compressed and deformed.
[0030]
【The invention's effect】
As described above, the present invention is a transmission belt molding die having a reinforcing material placed on the outer periphery thereof, and can be rotated in contact with the outer periphery of the reinforcing material placed on the die and driven along the axial direction of the die. The core wire is spirally wound around the outer periphery of the reinforcing material by rotating the die while pressing the core wire supplied to the outer periphery of the reinforcing material covered on the die with the outer peripheral surface of the touch pulley. In the core winding device for forming a transmission belt that is wound in the shape of a wire, a winding core wire pressing portion that holds the core wire that is supplied to the outer periphery of the reinforcing material and wound around the touch pulley, and a core that has been wound around the outer periphery of the reinforcing material Since the wound core wire holding part that holds the wire is formed, it is possible to wind the core wire while holding down the wound core wire and the wound core wire. The arrangement of cores in those which can be a good thing. In addition, since the radius of the wound core wire holding part is formed larger than the radius of the wound core wire holding part, the peripheral speed of the outer circumference of the wound core wire holding part and the outer circumference of the wound core wire holding part is increased. Make a difference so that the feeding speed of the core wire that is going to be wound while being pressed by the winding core wire holding part is equal to the feeding speed of the wound core wire that is pressed by the wound core wire holding part. The core wire can be wound around the outer periphery of the reinforcing material while preventing twisting due to the displacement of the reinforcing material caused by the speed of the core wire to be wound is higher than the speed of the wound core wire. is there.
[Brief description of the drawings]
FIG. 1 is a partial front view showing an example of an embodiment of the present invention.
FIG. 2 is a side view of a part of the above.
3A is a side cross-sectional view showing an example of a process for manufacturing a transmission belt, and FIG. 3B is an enlarged perspective view showing a part of the transmission belt.
FIG. 4 is a partial front view showing a conventional example.
FIG. 5 is a partial side view of the above.
FIG. 6 is a partial side view showing a phenomenon of tackle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reinforcement material 2 Mold 3 Touch pulley 4 Core wire 5 Winding core wire holding part 6 Rolled core wire holding part

Claims (2)

補強材を外周に被せた伝動ベルト成形用の金型と、金型に被せた補強材の外周に接して回転自在で且つ金型の軸方向に沿って移動駆動されるタッチプーリとを備えて成り、金型に被せた補強材の外周に供給される心線をタッチプーリの外周面で押さえながら金型を回転駆動させることによって、心線を補強材の外周にスパイラル状に巻き付けるようにした伝動ベルト成形用心線巻付け装置において、タッチプーリに、補強材の外周に供給されて巻き付けられる心線を押さえる巻付け心線押さえ部と、補強材の外周に巻き付け済みの心線を押さえる巻済み心線押さえ部を形成すると共に、巻済み心線押さえ部の半径を巻付け心線押さえ部の半径よりも大きく形成して成ることを特徴とする伝動ベルト成形用心線巻付け装置。A transmission belt molding die with a reinforcing material on the outer periphery, and a touch pulley that is rotatable in contact with the outer periphery of the reinforcing material on the die and driven to move along the axial direction of the die. The belt is wound around the outer periphery of the reinforcing material in a spiral shape by rotating the die while holding the core wire supplied to the outer periphery of the reinforcing material placed on the die with the outer peripheral surface of the touch pulley. In the core winding device for molding, a wound core wire pressing part that presses the core wire that is supplied to the outer periphery of the reinforcing material and wound around the touch pulley, and a wound core wire presser that holds the core wire wound around the outer periphery of the reinforcing material. And a core winding device for forming a transmission belt, wherein the winding core wire pressing portion has a radius larger than that of the winding core wire pressing portion. タッチプーリの巻付け心線押さえ部の半径をｒ1、巻済み心線押え部の半径をｒ3、補強材の厚みも含めた金型の半径をｒ2、心線の厚みをｔとすると、巻済み心線押え部の半径ｒ3と巻付け心線押さえ部の半径ｒ1の差ｄを、
ｄ＝Ａ×（０．５ｔ（ｒ1＋ｒ2）／ｒ2）
（ただし、Ａは０．１〜０．７の係数）
に設定することを特徴とする請求項１に記載の伝動ベルト成形用心線巻付け装置。If the radius of the winding core pressing part of the touch pulley is r 1 , the radius of the wound core pressing part is r 3 , the radius of the mold including the thickness of the reinforcing material is r 2 , and the thickness of the core is t. The difference d between the radius r 3 of the wound core wire holding part and the radius r 1 of the wound core wire holding part is given by:
d = A × (0.5t (r 1 + r 2 ) / r 2 )
(However, A is a coefficient of 0.1 to 0.7)
The core winding device for forming a transmission belt according to claim 1, wherein
JP2000278131A 2000-09-13 2000-09-13 Wire winding device for forming transmission belts Expired - Fee Related JP4445112B2 (en)

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JPH0692133B2 (en) * 1991-03-07 1994-11-16 三ツ星ベルト株式会社 Automatic rope winding device
JP3195533B2 (en) * 1996-03-29 2001-08-06 バンドー化学株式会社 Transmission belt forming device
JPH10235742A (en) * 1997-02-25 1998-09-08 Mitsuboshi Belting Ltd Spinning device for manufacturing toothed belt
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JP3803898B2 (en) * 1999-07-06 2006-08-02 ゲイツ・ユニッタ・アジア株式会社 Transmission belt core winding device
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