JP4708601B2

JP4708601B2 - Strip rubber member cutting method and cutting apparatus

Info

Publication number: JP4708601B2
Application number: JP2001153695A
Authority: JP
Inventors: 勇夫大岩; 征彦大木
Original assignee: Sumitomo Rubber Industries Ltd
Current assignee: Sumitomo Rubber Industries Ltd
Priority date: 2001-05-23
Filing date: 2001-05-23
Publication date: 2011-06-22
Anticipated expiration: 2021-05-23
Also published as: JP2002346978A

Description

【０００１】
【発明の属する技術分野】
本発明は、帯状ゴム部材切断方法及び切断装置に関する。
【０００２】
【従来の技術】
従来、図７に示すように、ベルトコンベヤー43上を送られてくる連続帯状ゴム部材42に於て、設定された長さだけ帯状ゴム部材42が送られ、コンベヤー43を一旦停止させて、コンベヤー43上を帯状ゴム部材42の幅方向に横行移動する回転式カッター44により、帯状ゴム部材42を幅方向に切断をする方法・装置が用いられている。又は、コンベヤーを運転したまま、つまり、ベルトコンベヤー上を連続的に送られてくる帯状ゴム部材に於ては、帯状ゴム部材を設定した長さだけ送られた後、カッターを備える台車がコンベヤーの進行方向に同じ速度で走行し、運転中のコンベヤー上を帯状ゴム部材の幅方向に横行移動する回転式カッターにより、帯状ゴム部材を幅方向に切断をする方法・装置が用いられている。
【０００３】
上記図７に示す間欠的に送られる帯状ゴム部材42を切断する方法・装置、又は、帯状ゴム部材を連続的に送りながら切断する方法・装置に於ては共に、図８に示すカッターの動きの説明図に示すように制御される。カッターによる帯状ゴム部材を切断後（切断工程Ｃ完了後）カッターの横行速度（図８の上部グラフ）がＶから０となった後（点ｘ）、カッターの上下位置（図８の下部グラフ）は、カッターを切断可能高さの下方位置Ｌから待機位置への返還移動可能高さの上方位置Ｕまで上昇させ（点ｙ）、その後、カッターを横行速度Ｖにより待機位置45（図７参照）まで移動させる（戻り工程Ｂ）。そして、カッターを待機位置45に到達させてから後（点ｚ）、カッターを上方位置Ｕから下方位置Ｌに降下させ、停止させる（以上で１サイクル）。そして、帯状ゴム部材２を必要長さだけ送り、カッターを帯状ゴム部材の幅方向に横行移動させ、再度切断を行う（切断工程Ｃ）ものである。
【０００４】
【発明が解決しようとする課題】
図８に示すように、切断工程Ｃ、カッター上昇、戻り工程Ｂ、カッター降下の一連の動作は、夫々の動作（工程）が完了確認後、次の動作に移るという動作時間が積み上げ式となる制御方法・装置であるため、切断動作開始から、待機位置にカッターが戻るまでに時間を要し、そのため、コンベヤーの送り時間が制限され単位時間当たりの切断作業能率が好ましくないという問題がある。
【０００５】
そこで本発明は、切断サイクルの時間短縮が可能で、且つ、良好な切断面を有することができる帯状ゴム部材切断方法及び切断装置を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上述の目的を達成するために、本発明に係る帯状ゴム部材切断方法は、カッターが待機位置から、連続的に送られてくる帯状ゴム部材の送り速度と同じ速度で前進移動しながら、該帯状ゴム部材の幅方向に横行移動しつつ該帯状ゴム部材を幅方向に切断する方法であって、上記カッターが、切断面両端部に薄肉部を有し且つ中間部に肉厚部を有するタイヤ用の帯状ゴム部材を幅方向に切断する際、切断開始時には、該帯状ゴム部材の上記薄肉部が変位乃至変形を伴わないよう低速で、その後、該帯状ゴム部材の上記中間部以後は、良好な切断面を有することができる程度の高速に、上記カッターが移動速度を変更して横行移動しながら該帯状ゴム部材の切断を行って、該帯状ゴム部材の切断後上記カッターが横行移動停止する前に、該カッターが横行速度を減速しつつ該帯状ゴム部材から離れた上方位置に移動し、該カッターが上記待機位置に戻って停止する前に、該カッターが横行速度を減速しつつ上記帯状ゴム部材を切断できる下方位置まで移動するものである。
【０００７】
上述の目的を達成するために、本発明に係る帯状ゴム部材切断装置は、横断面両端部に薄肉部を有し且つ中間部に肉厚部を有するタイヤ用の帯状ゴム部材を搬送装置により連続的に送りながら幅方向に切断するカッターを備える帯状ゴム部材切断装置であって、該カッターを有するカッターキャリッジと、該カッターと該カッターキャリッジを上記帯状ゴム部材の幅方向に横行移動させる横行機構と、上記カッターを昇降させる昇降駆動機構と、該カッターキャリッジと該横行機構と該昇降駆動機構とを有するカッター台車と、該カッター台車を上記帯状ゴム部材の送り方向に移動させる同期送り機構と、上記昇降駆動機構と上記横行機構と上記同期送り機構とを制御する制御手段と、を有し、制御手段によって、上記カッターが上記待機位置から、連続的に送られてくる上記帯状ゴム部材の送り速度と同じ速度で前進移動しながら、該帯状ゴム部材の幅方向に横行移動しつつ該帯状ゴム部材を幅方向に切断するように制御し、かつ、該帯状ゴム部材の切断後上記カッターが上記横行移動を停止する前に該カッターが減速すると共に上昇させ、かつ、所定待機位置に戻って停止する前に上記カッターが減速すると共に下降させるように制御し、さらに、上記カッターは、上記帯状ゴム部材の一端の薄肉部が変位乃至変形を伴わないよう低速で切断を開始し、該帯状ゴム部材の中間肉厚部から他端の薄肉部まで良好な切断面を有することができる程度の高速で切り抜けるように、上記横行機構が、上記カッターの移動速度を変更して横行移動させながら該帯状ゴム部材を幅方向に切断するように構成したものである。
【０００８】
【発明の実施の形態】
以下、図示の実施の形態に基づき、本発明を詳説する。
【０００９】
本発明による帯状ゴム部材切断装置は、ベルトコンベヤー等の搬送装置10により（連続的又は間欠的に）押出機（図示省略）から押し出され、送られる、ゴムタイヤを構成するトレッド等の帯状ゴム部材２を順次、タイヤ１本相当分の所定長さ寸法に切断する装置である。
【００１０】
図１及び図２は、帯状ゴム部材切断装置の実施の一形態を示す平面図及び側面図であり、図１の平面図において、回転式の円板状のカッター３は、帯状ゴム部材２を幅方向に切断する切断刃であり、このカッター３は、待機位置７（２点鎖線の状態）から、連続的に送られてくる帯状ゴム部材２の送り速度と同じ速度で前進移動しながら（相対速度を０として）、帯状ゴム部材２の幅方向に横行移動（左右方向移動）しつつ帯状ゴム部材２を幅方向に切断するものである（切断工程Ｃ）。そして、切断完了後、カッター３は待機位置７へ戻って待機状態となる（戻り工程Ｂ）ものであり（以上で１サイクル）、待機状態から引き続いて、カッター３は待機位置７から切断を開始するものである。
【００１１】
連続的に送られてくる帯状ゴム部材２の送り速度と同じ速度で前進移動しながら、帯状ゴム部材２の幅方向に横行移動しつつ帯状ゴム部材２を幅方向に切断するカッター３の動きは、図１に示す矢印のように、帯状ゴム部材２上を斜行運動するものである。
【００１２】
帯状ゴム部材２の切断時は、図２に示すように、搬送装置10上の帯状ゴム部材２を切断する為に、カッター３は、切断可能な切断高さの下方位置Ｌに配置され、切断を行うものである。そして、切断完了後、カッター３は、帯状ゴム部材２の上方を横切るよう通過して待機位置７へ戻るために、下方位置Ｌから、待機位置７への移動可能高さの上方位置Ｕまで上昇し（図３参照）移動を行うものである。
【００１３】
また、円板状のカッター３は、図２に示すように側面視に於いて、右下がりに配置（進行方向に前傾）されるため、帯状ゴム部材２の切断面形状は、そのカッター３の配置角度に対応した、右下がりの（帯状ゴム部材２の長手面に対して傾斜した）前傾斜面を有する切断面を得る。これにより、帯状ゴム部材２の加工次工程で行われる両端切断面の接着は、接着面拡大等の作用により良好なものとすることができ、タイヤとしての性能も、接合部は非接合部と同様のものとすることができる。また、カッター３切断位置は、搬送装置10の搬送ベルト材等は下方へ控えて、帯状ゴム部材２のみを切断するよう構成されている。
【００１４】
次にカッター３の昇降運転について、さらに詳説すると、カッター３は、帯状ゴム部材２の切断後、上記の横行移動停止をする前に、カッター３が帯状ゴム部材２から離れた上方位置Ｕに移動し、カッター３が待機位置７に戻って停止する前に、カッター３が帯状ゴム部材２を切断できる下方位置Ｌまで移動するものである。即ち、カッター３の昇降運転は、切断工程Ｃ及び戻り工程Ｂ内に含まれる同時運転するものであり、カッター３の動きは、１軸のみ（横行運動）の運転だけでなく、２軸の運転（横行運動及び昇降運動）を同時に有する立体３次元運動をおこなうよう制御されている。
【００１５】
さらに帯状ゴム部材切断装置について、具体的に説明すると、所定待機位置７（図１）から帯状ゴム部材２を幅方向に切断する回転式のカッター３は、図３に示すように、カッターキャリッジ８に取着されており、図１に示すように、カッターキャリッジ８は、帯状ゴム部材２の幅方向に横行移動させる横行機構５に走行可能に支持されている。
【００１６】
横行機構５は、帯状ゴム部材２の幅方向に設けた２本のガイドレール11と、ガイドレール11に平行でそれら間に位置する雄ネジ杆12と、雄ネジ杆12を回転させる横行用サーボモータ13とを有する。そして、カッターキャリッジ８は、このガイドレール11に嵌合する（図示省略の）ローラを有し、雄ネジ杆12に螺合する雌ネジを備えるソケット14を有し、雄ネジ杆12が回転することにより、ソケット14がこの雄ネジ杆12に沿って移動し、カッターキャリッジ８がガイドレール11に沿って走行するものである。また、この雄ネジ杆12及びソケット14の雌ネジは、ボールネジとすることにより動力の伝達効率を上げ、カッター３の横行移動を滑らか且つ高速に行えるものとする。又は、上記横行機構５が備えるカッターキャリッジ８の位置変位機構を、タイミングベルト式にしてもよいものである。
【００１７】
次に、カッター３を昇降させる昇降駆動機構６は、上述のとおり、カッター３を上方位置Ｕ及び下方位置Ｌに昇降（揺動）運動させるものであり、図２及び図３に示すように、カッターキャリッジ８（又はカッターキャリッジ８と横行機構５）を昇降（揺動）運動させるものである。又は、図示省略するが、カッター３のみを昇降又は揺動させるものとしてもよい。
【００１８】
次に、カッター３を帯状ゴム部材２の送り方向へ移動させる（進退動作）走行手段は、カッターキャリッジ８と横行機構５と昇降駆動機構６と、を搭載したカッター台車１を有するものとする。このカッター台車１は図２に示すように、同期送り機構４により、帯状ゴム部材２の送り方向へ前後方向移動できるものであり、同期送り機構４は、帯状ゴム部材２の長手方向に設けた雄ネジ杆15と、雄ネジ杆15を回転させる送り移動用サーボモータ16と図示省略のガイドレールと、を備える。そして、カッター台車１は、雄ネジ杆15に螺合する雌ネジ部17を有し、雄ネジ杆15が回転することにより、雌ネジ部17がこの雄ネジ杆15に沿って移動し、ガイドレールに沿って、カッター台車１は前後方向走行するものである。また、この雄ネジ杆15及び雌ネジ部17は、上記横行機構５と同様ボールネジとすることで、走行移動を滑らか且つ高速に行えるものとする。又は、昇降駆動機構６が備えるカッター台車１の位置変位機構を、タイミングベルト式にしてもよいものである。
【００１９】
そして、昇降駆動機構６と横行機構５と同期送り機構４は、制御手段９により、カッター３が帯状ゴム部材２の切断後停止する前に上記カッター３を上昇させ、且つ、所定待機位置７に戻って停止する前にカッター３を下降させるよう制御した（シーケンスが組まれた）ものである。
【００２０】
この制御手段９による、カッター３の運転制御について、さらに以下のように説明する。切断工程Ｃは、待機位置７にあるカッター３が切断作業開始後（幅方向移動開始後）カッター３が帯状ゴム部材２に接触するまでの第１余裕代ゾーンと、実際切断を行う切断ゾーンと、（帯状ゴム部材２からカッター３が離れる）切断完了後カッター３が横行停止するまでの第２余裕代ゾーンとを有する。そして、制御手段９は、帯状ゴム部材２の切断後、カッター３が下方位置Ｌから上方位置Ｕに移動するカッター上昇運動が、上記第２余裕ゾーンに含まれるか又は第２余裕ゾーンと一致するよう設定される。また、カッター３が待機位置７に戻って停止する前のカッター３が上方位置Ｕから下方位置Ｌに移動するカッター降下運動が、戻り工程Ｂの後半乃至戻り工程Ｂと一致するよう設定されるものである。また、カッター３は切断後及び待機位置７到着後、停止することなく、次の工程へ連続的に移動向きを変えて移動してもよいものである。
【００２１】
図５に、上記制御手段９により制御されたカッターの動きを示す。図５の上部グラフはカッター横行速度を示し、下部グラフはカッターの上下位置を示すものである。カッター３の発進指令ａ後（カッター３は下方位置Ｌにある）、カッター３の横行移動速度はＶに達し切断を行う。その後減速命令ｂと同時にカッター３の上昇指令ｍによりカッター３が下方位置Ｌから上方位置Ｕまで上昇し、停止して切断工程Ｃが終了する。続いて、戻り工程Ｂは、カッター３が上方位置Ｕのまま、発進指令ｄにより横行速度Ｖ（又は任意の速度）、で待機位置７へ移動始める。そして、横行速度Ｖで戻るカッター３は減速指令ｅにより減速を始めるとともにカッター３の降下指令ｎによりカッター３が上方位置Ｕから下方位置Ｌまで降下し、停止して戻り工程Ｂを終了する。以上を１サイクルとして連続して切断を行うものとする。
【００２２】
また、上記カッター３（カッターキャリッジ８）の移動距離及びカッター３の昇降（揺動）距離は制御手段９により、上記指令信号を出力するよう設定されている。又は、カッター３の位置確認は、夫々の動作始端・終端に位置検出用のセンサー等によって行ってもよい。
【００２３】
次に、カッター３は、帯状ゴム部材２の幅方向に移動速度を変更して横行移動しながら帯状ゴム部材２を幅方向に切断するようしたものとする。これは、横行機構５が、カッター３を帯状ゴム部材２の幅方向に横行（移動）速度Ｖを変更させて帯状ゴム部材２を幅方向に切断するよう制御したものである。
【００２４】
これは、従来、横行（移動）速度Ｖを（高速で）一定にして切断を行うと、タイヤを構成する帯状ゴム部材２（トレッド）の厚さが薄いもの、又は、（厚さの薄い）サイドウォール付きの帯状ゴム部材２（トレッド）を、カッター３の回転によって帯状ゴム部材２を切断する際、帯状ゴム部材２の切断面両縁部の薄肉部は剛性が低く、カッター３の切断移動時に適切に切断されないで横行方向（左右方向）に薄肉部が押されて切断面が荒れた状態で切断が行われてしまう。その結果、この帯状ゴム部材２は次工程に於いて、タイヤビルディングマシンで円筒状にロールして端面を接着する際、その両端面がそろわず、均一な接着が得られない。また、その接合部での分離（セパレーション）や、タイヤ回転力のアンバランス等の不具合を引き起こすこととなる。
【００２５】
しかし、上記のように横行（移動）速度Ｖを変更させて切断することでこの不具合は改善できる。図４の（イ）（ロ）に示すように、具体的に説明すると、カッター３が帯状ゴム部材２を幅方向に切断する際、切断開始時（切り込み時）には、帯状ゴム部材２の薄肉部乃至シャープエッジ部が変位乃至変形を伴わないように低速Ｖ_Sで横行移動させて確実な切断を行い（切り込み開始から約100mm 〜200mm ）、その後、帯状ゴム部材２の中間部以後は、良好な切断面を有することができる程度の高速Ｖ_Hで切り抜けさせるように、カッター３の移動速度を高速に変更して横行移動させながら帯状ゴム部材２の切断を行うものである。また、上記良好な切断面を有することができる程度とは、その切断両端面を接着する際、その接着性能、又は、タイヤとして構成させたときその接合面による不具合を発生させない状態をいう。
【００２６】
次に、上記図５に示したカッター３の制御手段９に、この横行変速機能を加えた制御手段９により制御されたカッターの動きを図６に示す。カッター３の発進指令ａ後（カッター３は下方位置Ｌにある）、カッター３の横行移動速度は一旦低速のＶ_Sに達し帯状ゴム部材２の薄肉部の切断を行う。そして、カッター３が帯状ゴム部材２の肉厚部付近に達するところで、加速指令ｆによりカッター３の横行速度をＶ_Hまで加速して一定速度Ｖ_Hで切断を継続する。切断後減速命令ｂと同時にカッター３は下方位置Ｌから上方位置Ｕまで上昇し、停止して切断工程Ｃが終了する。続いて、戻り工程Ｂは、カッター３が上方位置Ｕのまま、発進指令ｄにより横行速度Ｖ_H（又は任意速度Ｖ）で待機位置７へ移動始める。そして、横行速度Ｖで待機位置７に戻ってカッター３は減速指令ｅにより減速を始めるとともにカッター３は上方位置Ｕから下方位置Ｌまで降下し、停止して戻り工程Ｂを終了する。以上を１サイクルとして、連続して帯状ゴム部材２の切断を行うものとする。
【００２７】
そして、このカッター３の横行変速機能により、良好な切断面を得ることができ、カッター３の昇降動作により、帯状ゴム部材２の送り速度（搬送装置10の送り速度）を上げることができる。そして、この横行変速機構の速度調節及び移動距離は、自由に変更可能なものであり、あらかじめ設定できるものである。
【００２８】
【発明の効果】
本発明は上述の構成により次のような効果を奏する。
【００２９】
以上のように、帯状ゴム部材切断方法及び切断装置は、カッター３をスムーズかつ効率よく作動させることができる。つまり、帯状ゴム部材２の幅方向切断サイクルの短縮を可能とし、帯状ゴム部材２（搬送装置10）の送り速度の低下若しくは、停止を防ぎ、生産性を向上させることが可能である。
【００３０】
さらに、帯状ゴム部材２を長手方向に送りながら幅方向の切断を行うことで、一層ロス時間を短縮し、帯状ゴム部材２の切断サイクルの短縮を可能とすることができ、帯状ゴム部材２（搬送装置10）の送り速度の低下若しくは、停止を防ぎ、生産性を向上させることが可能である。
【００３１】
また、帯状ゴム部材２の横断面形状に適応した条件の切断が行え、良好な切断面を得ることが可能であり、タイヤ構成部材としての性能を充分に引き出すことが可能である。
【００３２】
また、帯状ゴム部材２特有の横断面形状の切断について、帯状ゴム部材２の切断面の厚さに左右されることなく、薄肉部においても良好な切断面を得ることができる。従って、切断後の帯状ゴム部材２を次工程においてタイヤ構成部材の円筒状としたときに、切断面の接着が確実で、接着部の分離、タイヤ回転力のアンバランス等の問題を引き起こさないようすることができる。
また、帯状ゴム部材２の切り込み時カッター３の横行速度Ｖを遅くしても、横行機構５による横行移動速度の変更動作により、全体の生産速度を落とすことがなく、且つ、良好な切断面を得ることが可能となる。
【図面の簡単な説明】
【図１】本発明の帯状ゴム部材切断装置の実施の一形態を示す全体平面図である。
【図２】本発明の帯状ゴム部材切断装置の実施の一形態を示す側面図である。
【図３】本発明のカッター揺動手段の一例を示す側面図である。
【図４】本発明のカッターの切断を説明する帯状ゴム部材の横断面図である。
【図５】本発明の帯状ゴム部材切断方法に於けるカッターの動きの説明図である。
【図６】本発明の帯状ゴム部材切断方法に於けるカッターの動きの説明図である。
【図７】従来の帯状ゴム部材切断装置を示す全体平面図である。
【図８】従来の帯状ゴム部材切断方法におけるカッターの動きの説明図である。
【符号の説明】
１カッター台車
２帯状ゴム部材
３カッター
４同期送り機構
５横行機構
６昇降駆動機構
７待機位置
８カッターキャリッジ
９制御手段
10 搬送装置
Ｖ _S 低速
Ｖ _H 高速 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strip rubber member cutting method and a cutting device.
[0002]
[Prior art]
Conventionally, as shown in FIG. 7, in the continuous belt-like rubber member 42 sent on the belt conveyor 43, the belt-like rubber member 42 is sent for a set length, and the conveyor 43 is temporarily stopped to move the conveyor. A method and apparatus for cutting the belt-like rubber member 42 in the width direction by a rotary cutter 44 that traverses in the width direction of the belt-like rubber member 42 on 43 is used. Or, in the case of a belt-shaped rubber member that is continuously fed on the belt conveyor while the conveyor is in operation, after the belt-shaped rubber member is fed for the set length, the carriage equipped with the cutter is moved to the conveyor. 2. Description of the Related Art A method and apparatus for cutting a belt-shaped rubber member in the width direction by a rotary cutter that travels at the same speed in the traveling direction and moves across the running conveyor in the width direction of the belt-shaped rubber member is used.
[0003]
In both the method and apparatus for cutting the intermittently fed belt-shaped rubber member 42 shown in FIG. 7 or the method and apparatus for cutting while continuously feeding the belt-like rubber member 42, the movement of the cutter shown in FIG. Control is performed as shown in FIG. After cutting the belt-shaped rubber member with the cutter (after completion of the cutting step C) After the cutter traverse speed (upper graph in FIG. 8) has changed from V to 0 (point x), the vertical position of the cutter (lower graph in FIG. 8) Raises the cutter from the lower position L of the cuttable height to the upper position U of the return movable height to the standby position (point y), and then moves the cutter to the standby position 45 at the traverse speed V (see FIG. 7). (Return process B). Then, after the cutter reaches the standby position 45 (point z), the cutter is lowered from the upper position U to the lower position L and stopped (one cycle above). Then, the belt-like rubber member 2 is fed by a necessary length, the cutter is moved transversely in the width direction of the belt-like rubber member, and cutting is performed again (cutting step C).
[0004]
[Problems to be solved by the invention]
As shown in FIG. 8, the series of operations of the cutting process C, the cutter ascending, the returning process B, and the cutter descending is an accumulating operation time in which each operation (process) is confirmed to be completed and then moved to the next operation. Since it is a control method / apparatus, it takes time for the cutter to return to the standby position from the start of the cutting operation. Therefore, there is a problem that the feeding time of the conveyor is limited and the cutting work efficiency per unit time is not preferable.
[0005]
Then, an object of this invention is to provide the strip | belt-shaped rubber member cutting method and cutting apparatus which can shorten the time of a cutting cycle and can have a favorable cut surface.
[0006]
[Means for Solving the Problems]
To achieve the above object, the strip rubber member cutting method according to the present invention, the cutter standby position while moving forward at the same speed as the feed speed of the belt-shaped rubber member sent continuously, the strip A method for cutting a belt-shaped rubber member in a width direction while traversing in the width direction of the rubber member, wherein the cutter has a thin portion at both ends of the cut surface and a thick portion at an intermediate portion. When the band-shaped rubber member is cut in the width direction, at the start of cutting, the thin-walled portion of the band-shaped rubber member is slow so as not to be displaced or deformed. The cutter cuts the belt-like rubber member while traversing and changing the moving speed at such a high speed that it can have a cut surface, and before the cutter stops traversing after cutting the belt-like rubber member to, the cutter There moves upward position away from the belt-shaped rubber member while decelerating the traverse speed, before the cutter stops returns to the standby position, cutting the belt-shaped rubber member with the cutter slows the transverse speed It moves to the lower position.
[0007]
In order to achieve the above-mentioned object, a belt-like rubber member cutting device according to the present invention is a continuous belt-like rubber member for tires having a thin portion at both ends of a transverse section and a thick portion at an intermediate portion by a conveyor device. A belt-like rubber member cutting device comprising a cutter that cuts in the width direction while feeding in a continuous manner, a cutter carriage having the cutter, and a traversing mechanism that traverses the cutter and the cutter carriage in the width direction of the belt-like rubber member; A lift drive mechanism for moving the cutter up and down, a cutter carriage having the cutter carriage, the traversing mechanism, and the lift drive mechanism, a synchronous feed mechanism for moving the cutter carriage in the feed direction of the belt-like rubber member, and And a control means for controlling the elevating drive mechanism, the traversing mechanism, and the synchronous feed mechanism. The belt-shaped rubber member is controlled so as to cut in the width direction while traversing in the width direction of the band-shaped rubber member while moving forward at the same speed as the feeding speed of the band-shaped rubber member fed continuously. And after the cutting of the belt-shaped rubber member, the cutter decelerates and rises before the cutter stops the transverse movement, and the cutter decelerates and descends before returning to the predetermined standby position and stopping. Furthermore, the cutter starts cutting at a low speed so that the thin-walled portion at one end of the belt-shaped rubber member is not displaced or deformed, and the thin-walled portion at the other end from the intermediate-walled portion of the belt-shaped rubber member. The traverse mechanism cuts the belt-like rubber member in the width direction while traversing it by changing the moving speed of the cutter so that it can be cut through at a high speed that can have a good cut surface to the part. It is those that you have configured so that.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Below, on the basis of the illustrated embodiment, to illustrate the invention.
[0009]
The belt-like rubber member cutting device according to the present invention is a belt-like rubber member 2 such as a tread constituting a rubber tire, which is extruded (continuously or intermittently) from an extruder (not shown) by a conveying device 10 such as a belt conveyor. Is sequentially cut into a predetermined length dimension corresponding to one tire.
[0010]
1 and 2 are a plan view and a side view showing an embodiment of a belt-like rubber member cutting device. In the plan view of FIG. 1, a rotary disk-shaped cutter 3 is provided with a belt-like rubber member 2. This cutter 3 is a cutting blade that cuts in the width direction, and this cutter 3 moves forward from the standby position 7 (two-dot chain line state) at the same speed as the feeding speed of the belt-like rubber member 2 that is continuously fed ( The belt-like rubber member 2 is cut in the width direction while traversing (moving in the left-right direction) in the width direction of the belt-like rubber member 2 (relative speed is 0) (cutting step C) . Its to, after completion of cutting, the cutter 3 is in a standby state returns to the standby position 7 (back step B) are those (or more in one cycle), following from the standby state, the cutter 3 is disconnected from the stand-by position 7 Is something that starts.
[0011]
The movement of the cutter 3 that cuts the belt-like rubber member 2 in the width direction while traversing in the width direction of the belt-like rubber member 2 while moving forward at the same speed as the feeding speed of the belt-like rubber member 2 continuously fed is as follows. As shown by the arrows in FIG. 1, the belt-like rubber member 2 is moved obliquely.
[0012]
When cutting the belt-like rubber member 2, as shown in FIG. 2, in order to cut the belt-like rubber member 2 on the conveying device 10, the cutter 3 is arranged at a position L below the cutting height at which cutting is possible. Is to do. Then, after the cutting is completed, the cutter 3 passes from above the belt-like rubber member 2 and returns to the standby position 7 so as to rise from the lower position L to the upper position U at a movable height to the standby position 7. (Refer to FIG. 3).
[0013]
Further, as shown in FIG. 2, the disc-shaped cutter 3 is arranged to the right (inclined forward in the advancing direction) in a side view, so that the cut surface shape of the belt-like rubber member 2 is the cutter 3. A cut surface having a front inclined surface (inclined with respect to the longitudinal surface of the belt-like rubber member 2) corresponding to the arrangement angle is lowered. Thereby, the adhesion of the cut surfaces at both ends performed in the next processing step of the belt-shaped rubber member 2 can be improved by an action such as expansion of the adhesion surface, and the performance as a tire is the same as the non-joint portion. It can be similar. Further, the cutter 3 is cut at the cutting position, with the conveying belt material and the like of the conveying device 10 being kept downward, so that only the belt-like rubber member 2 is cut.
[0014]
Next, the lifting and lowering operation of the cutter 3 will be described in more detail. The cutter 3 moves to an upper position U away from the belt-shaped rubber member 2 after the belt-shaped rubber member 2 is cut and before the transverse movement is stopped. Then, before the cutter 3 returns to the standby position 7 and stops, the cutter 3 moves to a lower position L where the belt-like rubber member 2 can be cut. That is, the lifting / lowering operation of the cutter 3 is performed simultaneously in the cutting process C and the return process B, and the movement of the cutter 3 is not only the operation of one axis (transverse movement) but also the operation of two axes. It is controlled to perform a three-dimensional three-dimensional motion having (a traversing motion and a lifting motion) simultaneously.
[0015]
Further, the belt-like rubber member cutting device will be described in detail. A rotary cutter 3 that cuts the belt-like rubber member 2 in the width direction from a predetermined standby position 7 (FIG. 1) includes a cutter carriage 8 as shown in FIG. As shown in FIG. 1, the cutter carriage 8 is supported by a traversing mechanism 5 that traverses the band-shaped rubber member 2 in the width direction.
[0016]
The traversing mechanism 5 includes two guide rails 11 provided in the width direction of the rubber band member 2, a male screw rod 12 parallel to the guide rail 11 and positioned between them, and a traverse servo for rotating the male screw rod 12. And a motor 13. The cutter carriage 8 has a roller (not shown) fitted to the guide rail 11 and has a socket 14 having a female screw that is screwed into the male screw rod 12, and the male screw rod 12 rotates. As a result, the socket 14 moves along the male screw rod 12, and the cutter carriage 8 travels along the guide rail 11. Further, the male screw rod 12 and the female screw of the socket 14 are ball screws, so that the power transmission efficiency is improved, and the transverse movement of the cutter 3 can be performed smoothly and at high speed. Alternatively, the position displacement mechanism of the cutter carriage 8 provided in the traverse mechanism 5 may be a timing belt type.
[0017]
Next, the raising / lowering drive mechanism 6 which raises / lowers the cutter 3 moves the cutter 3 up and down (oscillates) to the upper position U and the lower position L as described above, and as shown in FIGS. The cutter carriage 8 (or the cutter carriage 8 and the traversing mechanism 5) is moved up and down (oscillated). Alternatively, although not shown, only the cutter 3 may be moved up and down or rocked.
[0018]
Next, the traveling means for moving the cutter 3 in the feeding direction of the belt-shaped rubber member 2 (advance / retreat operation) has a cutter carriage 1 on which a cutter carriage 8, a traversing mechanism 5, and an elevating drive mechanism 6 are mounted. As shown in FIG. 2, the cutter carriage 1 can be moved in the front-rear direction in the feeding direction of the belt-like rubber member 2 by the synchronous feeding mechanism 4, and the synchronous feeding mechanism 4 is provided in the longitudinal direction of the belt-like rubber member 2. A male screw rod 15, a feed movement servomotor 16 for rotating the male screw rod 15, and a guide rail (not shown) are provided. The cutter carriage 1 has a female screw portion 17 that is screwed into the male screw rod 15, and when the male screw rod 15 rotates, the female screw portion 17 moves along the male screw rod 15, and the guide Along the rail, the cutter carriage 1 travels in the front-rear direction. In addition, the male screw rod 15 and the female screw portion 17 are ball screws similar to the traversing mechanism 5, so that traveling movement can be performed smoothly and at high speed. Alternatively, the position displacement mechanism of the cutter carriage 1 provided in the lifting drive mechanism 6 may be a timing belt type.
[0019]
Then, the elevation drive mechanism 6, the traversing mechanism 5 and the synchronous feed mechanism 4 are moved by the control means 9 before the cutter 3 stops after cutting the belt-like rubber member 2, and is moved to the predetermined standby position 7. Control is performed so that the cutter 3 is lowered before returning and stopping (a sequence is set).
[0020]
The operation control of the cutter 3 by the control means 9 will be further described as follows. The cutting process C includes a first margin zone until the cutter 3 comes into contact with the belt-like rubber member 2 after the cutter 3 at the standby position 7 starts cutting operation (after movement in the width direction), and a cutting zone that performs actual cutting. (The cutter 3 is separated from the belt-like rubber member 2) and a second margin zone until the cutter 3 stops traversing after the completion of cutting. And the control means 9 is included in the said 2nd allowance zone or the 2nd allowance zone corresponds to the cutter raising motion in which the cutter 3 moves from the lower position L to the upper position U after cutting the belt-shaped rubber member 2. It is set as follows. Also, the cutter lowering motion in which the cutter 3 moves from the upper position U to the lower position L before the cutter 3 returns to the standby position 7 and stops is set to coincide with the second half of the return process B or the return process B. It is. Further, the cutter 3 may move by changing its moving direction continuously to the next step without stopping after cutting and after arrival at the standby position 7.
[0021]
FIG. 5 shows the movement of the cutter controlled by the control means 9. The upper graph of FIG. 5 shows the cutter traverse speed, and the lower graph shows the vertical position of the cutter. After the start command a of the cutter 3 (the cutter 3 is in the lower position L), the traversing speed of the cutter 3 reaches V and performs cutting. Thereafter, the cutter 3 is raised from the lower position L to the upper position U by the raising command m of the cutter 3 simultaneously with the deceleration command b, stops, and the cutting step C is completed. Subsequently, in the return step B, the cutter 3 remains at the upper position U and starts moving to the standby position 7 at the traverse speed V (or any speed) according to the start command d. Then, the cutter 3 returning at the traverse speed V starts to decelerate by the deceleration command e, and the cutter 3 descends from the upper position U to the lower position L by the lowering command n of the cutter 3, stops and ends the return process B. It is assumed that cutting is performed continuously with the above as one cycle.
[0022]
The moving distance of the cutter 3 (cutter carriage 8) and the up / down (swinging) distance of the cutter 3 are set by the control means 9 so as to output the command signal. Alternatively, the position of the cutter 3 may be confirmed by a position detection sensor or the like at the start / end of each operation.
[0023]
Next, it is assumed that the cutter 3 cuts the belt-like rubber member 2 in the width direction while changing the moving speed in the width direction of the belt-like rubber member 2 and traversing. This is such that the traversing mechanism 5 controls the cutter 3 to change the traversing (moving) speed V in the width direction of the belt-shaped rubber member 2 to cut the belt-shaped rubber member 2 in the width direction.
[0024]
Conventionally, when cutting is performed at a constant traversing (moving) speed V (at a high speed), the belt-shaped rubber member 2 (tread) constituting the tire is thin or thin (thin). When the belt-like rubber member 2 (tread) with sidewalls is cut by rotating the cutter 3, the thin-walled portions at both edges of the cut surface of the belt-like rubber member 2 have low rigidity, and the cutter 3 is moved by cutting. Sometimes cutting is performed in a state in which the thin wall portion is pushed in the transverse direction (left-right direction) and the cut surface is rough without being cut appropriately. As a result, when the belt-like rubber member 2 is rolled into a cylindrical shape by a tire building machine and bonded to the end faces in the next step, the both end faces are not aligned and uniform bonding cannot be obtained. In addition, problems such as separation (separation) at the joint and imbalance of tire rotational force are caused.
[0025]
However, this problem can be improved by changing the traversing (moving) speed V as described above. Specifically, as shown in FIGS. 4A and 4B, when the cutter 3 cuts the belt-shaped rubber member 2 in the width direction, at the start of cutting (at the time of cutting), the band-shaped rubber member 2 by transverse movement at a low speed V _S as the thin portion or sharp edge portion without displacement or deformation perform reliable cutting (cut approximately 100 mm to 200 mm from the start), then an intermediate portion after the band-shaped rubber member 2, The belt-shaped rubber member 2 is cut while changing the moving speed of the cutter 3 at a high speed so as to be cut through at a high speed V _H that can provide a good cut surface. Moreover, the grade which can have the said favorable cut surface means the state which does not generate | occur | produce the malfunction by the bonding performance, when it is comprised as a tire, when bonding the cut both end surfaces.
[0026]
Next, FIG. 6 shows the movement of the cutter controlled by the control means 9 in which the traverse speed change function is added to the control means 9 of the cutter 3 shown in FIG. After the start command a of the cutter 3 (the cutter 3 is at the lower position L), the traversing speed of the cutter 3 once reaches a low V _S and cuts the thin portion of the belt-like rubber member 2. Then, when the cutter 3 reaches the vicinity of the thick portion of the belt-like rubber member 2, the traversing speed of the cutter 3 is accelerated to V _H by the acceleration command f and cutting is continued at a constant speed V _H. Simultaneously with the post-cutting deceleration command b, the cutter 3 rises from the lower position L to the upper position U, stops, and the cutting process C ends. Subsequently, in the return step B, the cutter 3 remains at the upper position U and starts to move to the standby position 7 at the traverse speed V _H (or the arbitrary speed V) according to the start command d. Then, the cutter 3 returns to the standby position 7 at the traverse speed V and starts to decelerate in response to the deceleration command e, and the cutter 3 descends from the upper position U to the lower position L, stops and ends the return process B. The above is one cycle, and the strip rubber member 2 is continuously cut.
[0027]
A good cut surface can be obtained by the traverse speed change function of the cutter 3, and the feed speed of the belt-like rubber member 2 (feed speed of the transport device 10) can be increased by the lifting / lowering operation of the cutter 3. The speed adjustment and moving distance of the traverse transmission mechanism can be freely changed and can be set in advance.
[0028]
【The invention's effect】
The present invention has the following effects by the above-described configuration.
[0029]
As described above, the belt-like rubber member cutting method and the cutting device can operate the cutter 3 smoothly and efficiently. That is, it is possible to shorten the cutting cycle in the width direction of the band-shaped rubber member 2, and to prevent a decrease or stop of the feeding speed of the band-shaped rubber member 2 (conveying device 10), thereby improving productivity.
[0030]
Et al of the belt-shaped rubber member 2 by performing the cutting of the feed while the width direction in the longitudinal direction, to reduce the more loss time, it is possible to allow the shortening of the cutting cycle of the belt-shaped rubber member 2, belt-shaped rubber member 2 (transport device 10) can be prevented from being lowered or stopped and the productivity can be improved.
[0031]
Moreover, the cutting | disconnection of the conditions suitable for the cross-sectional shape of the strip | belt-shaped rubber member 2 can be performed, a favorable cut surface can be obtained, and the performance as a tire structural member can fully be drawn out.
[0032]
Further, regarding the cutting of the cross-sectional shape peculiar to the belt-like rubber member 2, a good cut surface can be obtained even in a thin portion without being affected by the thickness of the cut surface of the belt-like rubber member 2. Therefore, when the band-shaped rubber member 2 after cutting is formed into the cylindrical shape of the tire constituent member in the next process, the bonding of the cut surface is ensured, so that problems such as separation of the bonded portion and imbalance of tire rotational force are not caused. can do.
Moreover, even if the transverse speed V of the cutter 3 is slowed when the belt-shaped rubber member 2 is cut, the overall production speed is not lowered by the operation of changing the transverse movement speed by the transverse mechanism 5, and a good cut surface is obtained. Can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall plan view showing an embodiment of a belt-like rubber member cutting device of the present invention.
FIG. 2 is a side view showing an embodiment of the belt-like rubber member cutting device of the present invention.
FIG. 3 is a side view showing an example of a cutter swinging means of the present invention.
FIG. 4 is a cross-sectional view of a belt-like rubber member for explaining cutting of the cutter of the present invention.
5 is a description diagram of the motion of at cutter strip rubber member cutting method of the present invention.
6 is a description diagram of the motion of at cutter strip rubber member cutting method of the present invention.
FIG. 7 is an overall plan view showing a conventional belt-shaped rubber member cutting device.
FIG. 8 is an explanatory view of the movement of a cutter in a conventional method for cutting a band-shaped rubber member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutter trolley 2 Band-shaped rubber member 3 Cutter 4 Synchronous feed mechanism 5 Traverse mechanism 6 Elevating drive mechanism 7 Standby position 8 Cutter carriage 9 Control means
10 Transport device
V _S low speed
V _H Fast

Claims

From the cutter (3) is a standby position (7), while forward movement at the same speed as the feed speed of the belt-shaped rubber member sent continuously (2), transverse movement in the width direction of the belt-shaped rubber member (2) belt-shaped rubber member (2) a method of cutting in the widthwise direction while,
When the cutter (3) cuts the belt-like rubber member (2) for a tire having a thin portion at both ends of the cut surface and a thick portion at the intermediate portion in the width direction, the belt-like rubber at the start of cutting. The thin part of the member (2) is at a low speed (V _s ) so as not to be displaced or deformed , and after that the intermediate part of the belt-like rubber member (2) can have a good cut surface. The belt-like rubber member (2) is cut while the cutter (3) traverses at a high speed (V _H ) while changing the moving speed,
Before cutting after the cutter of the belt-shaped rubber member (2) (3) stops transverse movement, moves upward position away from the cutter (3) belt-shaped rubber member while decelerating the transverse speed (2) Before the cutter (3) returns to the standby position (7) and stops , the cutter (3) moves to a lower position where the transverse rubber member (2) can be cut while reducing the traversing speed. A method for cutting a strip-shaped rubber member.

A cutter (3) that cuts in the width direction while continuously feeding a belt-like rubber member (2) for a tire having a thin portion at both ends of a transverse section and a thick portion at an intermediate portion by a conveying device (10). A belt-like rubber member cutting device comprising:
Cutter carriage (8) having the cutter (3), a traversing mechanism (5) for traversing the cutter (3) and the cutter carriage (8) in the width direction of the belt-like rubber member (2), and the cutter (3) A lift drive mechanism (6) for lifting and lowering, a cutter carriage (1) having the cutter carriage (8), the traversing mechanism (5) and the lift drive mechanism (6), and the cutter carriage (1 ) To move the belt-like rubber member (2) in the feeding direction, and to control the elevating drive mechanism (6), the traversing mechanism (5), and the synchronous feeding mechanism (4). Means (9),
While the cutter (3) is moved forward by the control means (9) at the same speed as the feeding speed of the belt-like rubber member (2) continuously fed from the standby position (7), the belt-like rubber The belt-like rubber member (2) is controlled to be cut in the width direction while traversing in the width direction of the member (2), and the cutter (3) is moved to the transverse after the belt-like rubber member (2) is cut. The cutter (3) is decelerated and raised before stopping the movement, and the cutter (3) is decelerated and lowered before returning to the predetermined standby position (7) and stopped,
Further, the cutter (3) starts cutting at a low speed (V _S ) so that the thin-walled portion at one end of the band-shaped rubber member (2) is not displaced or deformed, and the intermediate wall of the band-shaped rubber member (2) The traversing mechanism (5) changes the moving speed of the cutter (3) so as to cut through at a high speed (V _H ) that can have a good cut surface from the thick part to the thin part at the other end. A belt-shaped rubber member cutting device configured to cut the belt- shaped rubber member (2) in the width direction while traversing .