JP4141282B2

JP4141282B2 - Strip extrudate retention device

Info

Publication number: JP4141282B2
Application number: JP2003050969A
Authority: JP
Inventors: 一央阪本
Original assignee: Yokohama Rubber Co Ltd
Current assignee: Yokohama Rubber Co Ltd
Priority date: 2003-02-27
Filing date: 2003-02-27
Publication date: 2008-08-27
Anticipated expiration: 2023-02-27
Also published as: JP2004256273A

Description

【０００１】
【発明の属する技術分野】
本発明は、帯状押出物の滞留装置に関し、更に詳しくは、懸架して滞留させた帯状押出物の寸法安定性を改善するようにした帯状押出物滞留装置に関する。
【０００２】
【従来の技術】
例えば、空気入りタイヤの製造では、押出機から連続して押し出されたトレッドゴムなどに使用される帯状の未加硫ゴム材を定尺に切断する工程がある。そこでは、搬送速度の異なる前後のコンベア間に、懸架した未加硫ゴム材の滞留量を変えて前後のコンベアの搬送速度差を保障する滞留装置が設けられている。
【０００３】
従来、上述した滞留装置として、例えば、前後のコンベア間に前後の懸架用ローラを配置し、その懸架用ローラ間に未加硫ゴム材をその自重により弛ませて懸架するようにしたものがある（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開平６−２１９６１２号公報
【０００５】
【発明が解決しようとする課題】
しかしながら、このように重量がある帯状の押出物は、その後端部が滞留装置に到達し、後側の懸架用ローラを通過すると、その自重により懸架用ローラ間のピット内に落下し、その落下の衝撃により押出物が引っ張られて伸ばされ、寸法変化が生じる。
【０００６】
このような寸法変化は、定尺切断された部材に重量変化を招くため、空気入りタイヤにあってはタイヤの均一性を阻害する大きな要因の一つになっていた。また、懸架時にも、押出物の自重により垂れ下がるため、重量がある帯状の押出物では寸法変化が生じることは避けられない。
【０００７】
従って、上述した滞留装置では、懸架して滞留させた帯状押出物の寸法安定性が劣るという問題があった。
【０００８】
本発明の目的は、懸架して滞留させた帯状押出物の寸法安定性を改善することが可能な帯状押出物滞留装置を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成する本発明の帯状押出物滞留装置は、帯状押出物を搬送する搬送速度の異なる前後のコンベア間に設置され、該前後のコンベア間に懸架された前記帯状押出物の滞留量を変えて前記前後のコンベアの搬送速度差を保障する帯状押出物滞留装置であって、前記前後のコンベア間に前記帯状押出物の下面を支持する変形可能な帯状押出物支持体を懸架し、該帯状押出物支持体の下方側に前記帯状押出物支持体の懸架状態を変更可能な懸架調整手段を設け、前記懸架した帯状押出物の最下端における該帯状押出物と前記帯状押出物支持体との距離を検出する距離検出センサーを設置すると共に、該距離検出センサーからの検出信号に基づいて前記懸架調整手段を前記距離が一定となるように制御する制御手段を設け、前記帯状押出物支持体の一端を前記前後のコンベアの一方近傍に固定した固定端にする一方、他端を他方のコンベア近傍に上下に移動自在に配設した自由端にし、前記帯状押出物支持体の他端に前記懸架調整手段を連結したことを特徴とする。
【００１０】
また、本発明の別の帯状押出物滞留装置は、前後のコンベア間に帯状押出物の下面を支持する変形可能な帯状押出物支持体を懸架し、この帯状押出物支持体を、左右に並設したチェーン間に搬送方向に沿って所定の間隔で回転自在なロール体を配置して構成し、該帯状押出物支持体の下方側に前記帯状押出物支持体の懸架状態を変更可能な懸架調整手段を設け、前記懸架した帯状押出物の最下端における該帯状押出物と前記帯状押出物支持体との距離を検出する距離検出センサーを設置すると共に、該距離検出センサーからの検出信号に基づいて前記懸架調整手段を前記距離が一定となるように制御する制御手段を設けたことを特徴とする。
また、本発明の別の帯状押出物滞留装置は、前後のコンベア間に帯状押出物の下面を支持する変形可能な帯状押出物支持体を懸架し、該帯状押出物支持体の下方側に前記帯状押出物支持体の懸架状態を変更可能な懸架調整手段を設け、前記懸架した帯状押出物の最下端における該帯状押出物と前記帯状押出物支持体との距離を検出する距離検出センサーを設置すると共に、該距離検出センサーからの検出信号に基づいて前記懸架調整手段を前記距離が一定となるように制御する制御手段を設け、前記距離検出センサーをその自重により前記帯状押出物支持体に移動可能に取り付けたことを特徴とする。
また、本発明の別の帯状押出物滞留装置は、前後のコンベア間に帯状押出物の下面を支持する変形可能な帯状押出物支持体を懸架し、該帯状押出物支持体の下方側に前記帯状押出物支持体の懸架状態を変更可能な懸架調整手段を設け、前記懸架した帯状押出物の最下端における該帯状押出物と前記帯状押出物支持体との距離を検出する距離検出センサーを設置すると共に、該距離検出センサーからの検出信号に基づいて前記懸架調整手段を前記距離が一定となるように制御する制御手段を設け、前記懸架した帯状押出物支持体の他端部を前記他方のコンベア近傍に配設した回転自在な懸架軸を介して上方から下方に折り返し、該他端部の下方に前記懸架調整手段を配置し、該懸架調整手段を、前記帯状押出物支持体の他端に連結した線状体と、該線状体を巻取り、巻出し可能なリール体とを有する構成にしたことを特徴とする。
また、本発明の別の帯状押出物滞留装置は、前後のコンベア間に帯状押出物の下面を支持する変形可能な帯状押出物支持体を懸架し、該帯状押出物支持体の下方側に前記帯状押出物支持体の懸架状態を変更可能な懸架調整手段を設け、前記懸架した帯状押出物の最下端における該帯状押出物と前記帯状押出物支持体との距離を検出する距離検出センサーを設置すると共に、該距離検出センサーからの検出信号に基づいて前記懸架調整手段を前記距離が一定となるように制御する制御手段を設け、前記懸架された帯状押出物の最下端の位置を検出するポテンショメータからなる位置検出センサーを設置し、該ポテンショメータの可動端子を前記帯状押出物支持体の他端の昇降に応じて移動可能にしたことを特徴とする。
【００１１】
上記本発明によれば、帯状押出物の後端部が滞留装置を通過する際に、帯状押出物支持体により支持することができるので、帯状押出物の自重により落下することがなく、従って、落下の衝撃に起因する寸法変化を防止することができる。
【００１２】
また、帯状押出物の前後端側下面が帯状押出物支持体に当接して支持されながら懸架されるため、懸架時の帯状押出物の自重による垂れ下がりが原因で生じる寸法変化の抑制が可能になる。
【００１３】
更に、懸架した帯状押出物の最下端と帯状押出物支持体との距離を一定に保つようにして帯状押出物を帯状押出物支持体上に滞留させるので、懸架時に帯状押出物支持体上に滞留させ過ぎて形状を阻害したり、あるいは帯状押出物と帯状押出物支持体との離れすぎにより、上述した自重による垂れ下がりが原因で生じる寸法変化の抑制効果を損なうことがない。
【００１４】
従って、懸架して滞留させた帯状押出物の寸法安定性を改善することが可能になる。
【００１５】
【発明の実施の形態】
以下、本発明の構成について添付の図面を参照しながら詳細に説明する。
【００１６】
図１は、本発明の帯状押出物滞留装置の一例を示し、この滞留装置は、押出機から連続して押し出された帯状の未加硫ゴム材などからなる帯状押出物Ｘを搬送する、搬送速度の異なる前後のコンベアＡ，Ｂ間に設置され、前後のコンベアＡ，Ｂ間に懸架された帯状押出物Ｘの滞留量を変えて前後のコンベアＡ，Ｂの搬送速度差を保障するものである。
【００１７】
前後のコンベアＡ，Ｂ間に帯状押出物Ｘの下面を支持する変形可能な帯状押出物支持体１が懸架されている。帯状押出物支持体１は、図２に示すように、左右（図の前後）に並設した２組のチェーン３間に搬送方向Ｃに沿って所定の間隔でロール体５を配設した構成になっている。ロール体５は、チェーン３間に固定された軸体７にその長手方向に沿って所定の間隔で複数のロール９を回転自在に配置して構成されている。
【００１８】
搬送方向Ｃに沿って延在する帯状押出物支持体１の後端１Ａ（チェーン３の後端）が後側のコンベアＢの近傍に固定された固定端になっているのに対して、帯状押出物支持体１の前端１Ｂ（チェーン３の前端）が前側のコンベアＡの近傍に上下に移動自在に配設した自由端にしてある。
【００１９】
チェーン３の前端部３Ａは、前側のコンベアＡ近傍に配設した回転自在な懸架軸１１を介して上方から下方に向けて折り返されている。この懸架軸１１は、チェーン３が係合するスプロケットを有するように構成するのが好ましい。
【００２０】
前端部３Ａの下方には、帯状押出物支持体１の懸架状態を変更可能な懸架調整手段１３が設置されている。懸架調整手段１３は、チェーン３の前端に連結された金属ワイヤーなどの線状体１５と、この線状体１５を巻き取るリール体１７を有している。
【００２１】
リール体１７はモータ１９に連結され、このモータ１９の作動により、線状体１５の巻取り、及び巻出しが可能になっており、このリール体１７の巻取り、巻出しによりチェーン３の前端が上下動し、それにより帯状押出物支持体１の懸架状態を深く、あるいは浅く変更して調整できるようになっている。
【００２２】
チェーン３の近傍には、懸架した帯状押出物Ｘの最下端Ｘ１における帯状押出物Ｘと帯状押出物支持体１との距離を検出する距離検出センサー２１が設置されている。この距離検出センサー２１は、帯状押出物Ｘが所定の距離内に近づくと検出信号を出力し、所定の距離外になると検出信号を出力しないように構成され、図２に示すように、２組のチェーン３間に搬送方向Ｃに沿って延設された変形可能なガイド体２３に取り付けられている。
【００２３】
ガイド体２３は、両側のチェーン３に支持され、チェーン３の変形に追従して変形するようになっている。ガイド体２３に取り付けられた距離検出センサー２１は、その自重によりガイド体２３に沿って移動できるようにしてあり、帯状押出物Ｘの最下端Ｘ１の下方に常に位置するようにしてある。
【００２４】
距離検出センサー２１には、懸架調整手段１３を制御する制御手段２５が接続されている。この制御手段２５は、距離検出センサー２１から検出信号が入力されると、懸架調整手段１３にリール体１７から線状体１５を巻き出させる制御信号を出力し、帯状押出物支持体１の懸架状態を深くなるように変更する。
【００２５】
また、距離検出センサー２１から検出信号が入力されないと、懸架調整手段１３に線状体１５を巻き取らせる制御信号を出力し、帯状押出物支持体１の懸架状態を浅くなるように変更し、帯状押出物Ｘの懸架状態に帯状押出物支持体１を追従させ、帯状押出物Ｘの最下端Ｘ１と帯状押出物支持体１との距離が一定の距離となるように制御するようにしている。
【００２６】
制御手段２５には、前側のコンベアＡ側に設置され、帯状押出物Ｘの先端が前側のコンベアＡに到達したのを検出する先端検出センサー２７が接続されている。また、後側のコンベアＢ側に設置され、帯状押出物Ｘの後端が後側のコンベアＢを通過するのを検出する後端検出センサー２９が接続してある。
【００２７】
制御手段２５は、先端検出センサー２７による帯状押出物Ｘの先端検出前は、懸架調整手段１３に線状体１５をリール体１７に巻き取らせた状態にさせ、帯状押出物支持体１を前後のコンベアＡ，Ｂ間で弛まずに張設した状態となるように制御する。先端検出センサー２７が帯状押出物Ｘの先端を検出すると、その入力信号を受けて制御手段２５は、距離検出センサー２１からの検出信号により、懸架調整手段１３に制御信号を出力する。
【００２８】
また、制御手段２５は、後端検出センサー２９による帯状押出物Ｘの後端が検出されると、その入力信号を受けて、懸架調整手段１３を帯状押出物支持体１が懸架したそのままの状態を維持するように制御する。即ち、モータ１９の作動を停止させ、リール体１７をその位置にロックするようになっている。
【００２９】
帯状押出物支持体１の近傍には、懸架された帯状押出物Ｘの最下端Ｘ１の位置を検出する位置検出センサー３１が設置してある。この位置検出センサー３１は、ポテンショメータから構成され、制御手段２５に接続されている。このポテンショメータは、その可動端子（不図示）と帯状押出物支持体１の前端とが連結部材３３を介して連結され、可動端子が帯状押出物支持体１の前端の昇降に応じて移動可能になっている。
【００３０】
制御手段２５にはポテンショメータからの入力信号に応じた帯状押出物Ｘの最下端Ｘ１の位置データが予めインプットされており、その位置データから帯状押出物Ｘの最下端Ｘ１の位置を求めるようにしてある。
【００３１】
コンベアＡ，Ｂを作動する駆動モータＡ１，Ｂ１には、コンベアＡ，Ｂの搬送速度をそれぞれ制御する搬送制御手段３５が接続されている。この搬送制御手段３５は、制御手段２５に接続されている。
【００３２】
制御手段２５は、ポテンショメータからの入力信号により、帯状押出物Ｘの最下端Ｘ１の位置を予め設定された下方限界位置より下方にあると判断する、即ち、滞留量が多くなり過ぎると、搬送制御手段３５に後側のコンベアＢの停止を指示する信号を出力すると共に、後側のコンベアＢより後方の各機器に作動を停止する指示信号を送出するようになっている。その信号を制御手段２５から受けると、搬送制御手段３５は駆動モータＢ１に停止信号を送出し、後側のコンベアＢの作動を停止させる。
【００３３】
以下、上述した滞留装置による帯状押出物滞留方法について説明する。
【００３４】
先ず、不図示の押出機で帯状押出物Ｘの押し出しを開始すると、制御手段２５からの制御信号を受けて、懸架調整手段１３のモータ１９が作動し、線状体１５をリール体１７に巻き取って、帯状押出物支持体１を前後のコンベアＡ，Ｂ間で懸架させずに張設した状態にする。
【００３５】
この状態で、後側のコンベアＢ上を搬送されてきた帯状押出物Ｘが帯状押出物支持体１を渡って前側のコンベアＡ上に搬送され、その先端が先端検出センサー２７により検出されると、制御手段２５が搬送制御手段３５に信号を出力し、搬送制御手段３５はその信号を受けて前側のコンベアＡの駆動モータＡ１に駆動停止信号を送出する。これにより前後のコンベアＡ，Ｂ間に帯状押出物Ｘの滞留が始まる。
【００３６】
それと同時に制御手段２５は、距離検出センサー２１からの検出信号の受け入れを開始する。距離検出センサー２１からの検出信号を受けて、懸架調整手段１３に制御信号を出力し、線状体１５をリール体１７から巻き出し、それにより自重により懸架する帯状押出物支持体１の前端を上方に移動させ、滞留を開始した帯状押出物Ｘの最下端Ｘ１と帯状押出物支持体１との距離が一定の距離となるように帯状押出物支持体１を懸架させる。
【００３７】
懸架を開始した帯状押出物Ｘは、図１に示すように、その前後端側下面が帯状押出物支持体１に支持されながら、帯状押出物Ｘの最下端Ｘ１と帯状押出物支持体１との距離が一定となるようにして、次第に深く懸架する帯状押出物支持体１上に滞留する。
【００３８】
次いで、搬送制御手段３５からの信号を駆動モータＡ１が受けて、前側のコンベアＡが帯状押出物Ｘを後側のコンベアＢより早い搬送速度で次の切断工程に所定長さ搬送する。
【００３９】
これにより帯状押出物Ｘの懸架量が減少し、帯状押出物Ｘの最下端Ｘ１が上方に移動する。それにより距離検出センサー２１からの検出信号が途絶えると、制御手段２５が懸架調整手段１３に線状体１５をリール体１７に巻き取るように指示する制御信号を出力する。それにより帯状押出物支持体１の先端が下方に移動し、帯状押出物支持体１がその懸架状態を浅くして、帯状押出物Ｘの懸架状態に追従し、最下端Ｘ１との距離を一定となるように上方に移動する。
【００４０】
前後のコンベアＡ，Ｂ間で帯状押出物Ｘを搬送中、距離検出センサー２１からの検出信号が制御手段２５に入力されると、帯状押出物支持体１の懸架状態を深くし、検出信号の入力がなくなると、帯状押出物支持体１の懸架状態を浅くし、帯状押出物支持体１を帯状押出物Ｘの懸架状態に常に追従させて最下端Ｘ１との距離を一定に保つようにしながら、帯状押出物Ｘを帯状押出物支持体１上に滞留させる。
【００４１】
押出機での押出しが終了し、帯状押出物Ｘの後端が後端検出センサー２９により検出されると、その検出信号を受けて、制御手段２５は懸架調整手段１３を停止させ、帯状押出物支持体１をその懸架状態に維持させる。後側のコンベアＡを通過した帯状押出物Ｘの後端部は、懸架した帯状押出物支持体１上を渡って前側のコンベアＡ側に搬送される。
【００４２】
上述した本発明によれば、帯状押出物Ｘを帯状押出物支持体１上に滞留させるようにしたので、帯状押出物Ｘの後端部が滞留装置を通過する際に、その自重により落下するのを防止することができる。従って、その落下の衝撃により帯状押出物Ｘが引っ張られて寸法変化を生じることがない。
【００４３】
また、帯状押出物Ｘの前後端側下面が帯状押出物支持体１に当接して支持されながら懸架されるので、従来よりも懸架時における帯状押出物Ｘの自重による垂れ下がりが原因で生じる寸法変化を抑制することができる。
【００４４】
しかも、懸架した帯状押出物Ｘの最下端Ｘ１と帯状押出物支持体１との距離を一定にしながら帯状押出物Ｘを帯状押出物支持体１上に滞留させるので、帯状押出物支持体１上に滞留させ過ぎて形状を阻害したり、あるいは帯状押出物Ｘと帯状押出物支持体１との離れすぎにより、上述した寸法変化を抑制する効果を損なうことがない。
【００４５】
従って、懸架して滞留させた帯状押出物Ｘの寸法安定性を改善することができる。
【００４６】
本発明において、帯状押出物支持体１は、上記実施形態では、後端を後側のコンベアＢの近傍に固定した固定端にし、前端を前側のコンベアＡの近傍に移動自在に配設した自由端にする構成にしたが、後端を自由端にし、前端を固定端にするようにしてもよく、帯状押出物支持体１の一端を前後のコンベアＡ，Ｂのいずれか一方側近傍に固定した固定端にし、他端を他方のコンベア近傍に上下に移動自在に配設した自由端にすることができる。
【００４７】
あるいは、帯状押出物支持体１の両端を自由端にし、その両端部を懸架軸で上方から下方に折り返し、その両端に懸架調整手段を設けるようにすることも可能である。
【００４８】
帯状押出物支持体１におけるロール体５は、軸体７に１本の横長のロールを回転自在に取り付けた構成であってもよく、また帯状押出物支持体１は、帯状押出物Ｘの搬送に支障がない程度に帯状押出物Ｘとの接触する部分での摩擦抵抗を低くした構成の支持体であればよく、例えば、無端帯状部材を周回自在に掛回したような構成であってもよい。
【００４９】
距離検出センサー２１としては、上述したように帯状押出物Ｘが所定の距離内に近づいた際にのみ検出信号を出力する構成であれば、いずれの構成のセンサーを用いてもよく、例えば、センサー本体の上面に出没自在な検出突起を突設すると共にその検出突起を常時上方に弾性付勢し、その検出突起に帯状押出物Ｘが当たって検出突起を押し込んだ際に検出信号を出力するような構成のセンサーを使用することができる。
【００５０】
あるいは、帯状押出物Ｘ内にスチールコードなどの磁性体を埋設している場合には、近接スイッチを用いることができる。また、距離検出センサー２１は、上述したものに限定されず、懸架した帯状押出物Ｘの最下端Ｘ１と帯状押出物支持体１との距離を検出できるものであれば他のセンサーを使用してもよく、例えば、カメラなどの画像読み取り装置を用いてもよい。
【００５１】
画像読み取り装置を使用する場合には、帯状押出物Ｘと帯状押出物支持体１に対面する左右いずれか一方に離間して配置し、制御手段２５は、画像読み取り装置から入力された画像信号に基づいて、帯状押出物Ｘの最下端Ｘ１と帯状押出物支持体１との距離を演算し、その距離を予め設定された一定の距離となるように懸架調整手段１３に制御信号を出力するように構成することができる。
【００５２】
位置検出センサー３１も、上述したポテンショメータに限定されず、例えば、画像読み取り装置を検出可能な位置に設置して使用するようにしてもよい。
【００５３】
先端検出センサー２７及び後端検出センサー２９としては、帯状押出物Ｘの先端と後端を検出することができるセンサーであればいずれのセンサーを用いてもよい。
【００５４】
本発明は、特に空気入りタイヤの製造工程において、押出機から連続して押し出されたトレッドゴムなどに使用される帯状の未加硫ゴム材を定尺切断する際に使用される滞留装置に好適に使用することができるが、当然のことがながらそれに限定されない。
【００５５】
【発明の効果】
上述したように本発明は、帯状押出物を懸架した際に、帯状押出物支持体で帯状押出物の下面を支持しながら、懸架した帯状押出物の最下端と帯状押出物支持体との距離が一定となるように帯状押出物支持体の懸架状態を調整しながら帯状押出物を滞留させるので、懸架して滞留させた帯状押出物の寸法安定性を改善することができる。
【図面の簡単な説明】
【図１】本発明の帯状押出物滞留装置の一例を示す概略説明図である。
【図２】図１における帯状押出物支持体の一例を示す要部拡大平面図である。
【符号の説明】
１帯状押出物支持体１Ａ後端
１Ｂ前端３チェーン
５ロール体１１懸架軸
１３懸架調整手段１５線状体
１７リール体２１距離検出センサー
２５制御手段２７先端検出センサー
２９後端検出センサー３１位置検出センサー
Ａ，Ｂ前後のコンベアＣ搬送方向
Ｘ帯状押出物Ｘ１最下端[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retention device for a strip-shaped extrudate, and more particularly to a strip-shaped extrudate retention device for improving the dimensional stability of a suspended and retained strip-shaped extrudate.
[0002]
[Prior art]
For example, in the production of a pneumatic tire, there is a step of cutting a strip-shaped unvulcanized rubber material used for tread rubber or the like continuously extruded from an extruder into a fixed length. There, a staying device is provided between the front and rear conveyors having different transport speeds to ensure the difference in the transport speed between the front and rear conveyors by changing the amount of suspended unvulcanized rubber material.
[0003]
Conventionally, as the staying device described above, for example, there are ones in which front and rear suspension rollers are arranged between front and rear conveyors, and an unvulcanized rubber material is slackened and suspended between the suspension rollers by its own weight. (For example, refer to Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-219612
[Problems to be solved by the invention]
However, the strip-shaped extrudate having such a heavy weight, when its rear end reaches the staying device and passes through the suspension roller on the rear side, it falls into the pits between the suspension rollers due to its own weight, and the fall Due to the impact, the extrudate is pulled and stretched, resulting in a dimensional change.
[0006]
Such a dimensional change causes a change in the weight of the member cut into a regular size, and thus has been one of the major factors that hinder the uniformity of the tire in a pneumatic tire. Moreover, since it hangs down by the dead weight of an extrudate also at the time of suspension, it is inevitable that a dimensional change will arise in the extrudate with a heavy strip | belt.
[0007]
Therefore, the above-described staying device has a problem that the dimensional stability of the extrudate that is suspended and retained is inferior.
[0008]
The objective of this invention is providing the strip | belt-shaped extrudate retention apparatus which can improve the dimensional stability of the strip | belt-shaped extrudate suspended and retained.
[0009]
[Means for Solving the Problems]
The strip-shaped extrudate retention device of the present invention that achieves the above object is installed between the front and rear conveyors having different conveying speeds for transporting the strip-shaped extrudate, and the retention amount of the band-shaped extrudate suspended between the front and rear conveyors is determined. A belt-like extrudate retention device that changes the transport speed difference between the front and rear conveyors, and suspends a deformable belt-like extrudate support that supports the lower surface of the belt-like extrudate between the front and rear conveyors, Suspension adjusting means capable of changing the suspension state of the belt-like extrudate support is provided on the lower side of the belt-like extrudate support, and the belt-like extrudate and the belt-like extrudate support at the lowest end of the suspended belt-like extrudate. A distance detection sensor for detecting the distance of the belt, and a control means for controlling the suspension adjusting means so that the distance becomes constant based on a detection signal from the distance detection sensor. One end of the holding body is a fixed end fixed in the vicinity of one of the front and rear conveyors, while the other end is a free end disposed so as to be movable up and down in the vicinity of the other conveyor, and the other end of the belt-like extrudate support. The suspension adjusting means is connected to the above .
[0010]
Further, another strip-shaped extrudate retention device of the present invention suspends a deformable strip-shaped extrudate support that supports the lower surface of the strip-shaped extrudate between front and rear conveyors, and the strip-shaped extrudate support is arranged side by side. A roll body that is configured to be rotatable between the provided chains at a predetermined interval along the conveying direction, and is capable of changing the suspension state of the belt-like extrudate support below the belt-like extrudate support. An adjustment means is provided, and a distance detection sensor for detecting a distance between the belt-like extrudate and the belt-like extrudate support at the lowermost end of the suspended belt-like extrudate is installed, and based on a detection signal from the distance detection sensor Control means for controlling the suspension adjusting means so that the distance is constant.
Further, another strip-shaped extrudate retention device of the present invention suspends a deformable strip-shaped extrudate support that supports the lower surface of the strip-shaped extrudate between the front and rear conveyors, and the above-described belt-shaped extrudate support is below the band-shaped extrudate support. A suspension adjusting means capable of changing the suspension state of the belt-like extrudate support is provided, and a distance detection sensor for detecting the distance between the belt-like extrudate and the belt-like extrudate support at the lowest end of the suspended belt-like extrudate is installed. And a control means for controlling the suspension adjusting means so that the distance becomes constant based on a detection signal from the distance detection sensor, and the distance detection sensor is moved to the belt-like extrudate support by its own weight. It is possible to install it.
Further, another strip-shaped extrudate retention device of the present invention suspends a deformable strip-shaped extrudate support that supports the lower surface of the strip-shaped extrudate between the front and rear conveyors, and the above-described belt-shaped extrudate support is below the band-shaped extrudate support. A suspension adjusting means capable of changing the suspension state of the belt-like extrudate support is provided, and a distance detection sensor for detecting the distance between the belt-like extrudate and the belt-like extrudate support at the lowest end of the suspended belt-like extrudate is installed. And a control means for controlling the suspension adjusting means so that the distance becomes constant based on a detection signal from the distance detection sensor, and the other end of the suspended belt-like extrudate support is connected to the other end. Folded from above to below via a rotatable suspension shaft disposed in the vicinity of the conveyor, the suspension adjusting means is disposed below the other end, and the suspension adjusting means is connected to the other end of the belt-like extrudate support. A linear body connected to The said linear body winding, characterized in that a configuration having a unwinding capable reel body.
Further, another strip-shaped extrudate retention device of the present invention suspends a deformable strip-shaped extrudate support that supports the lower surface of the strip-shaped extrudate between the front and rear conveyors, and the above-described belt-shaped extrudate support is below the band-shaped extrudate support. A suspension adjusting means capable of changing the suspension state of the belt-like extrudate support is provided, and a distance detection sensor for detecting the distance between the belt-like extrudate and the belt-like extrudate support at the lowest end of the suspended belt-like extrudate is installed. And a potentiometer for detecting the position of the lowest end of the suspended belt-like extrudate provided with control means for controlling the suspension adjusting means so that the distance is constant based on a detection signal from the distance detection sensor. The position detection sensor which consists of this is installed, The movable terminal of this potentiometer was made movable according to raising / lowering of the other end of the said strip | belt-shaped extrudate support body.
[0011]
According to the present invention, when the rear end of the strip-shaped extrudate passes through the staying device, it can be supported by the strip-shaped extrudate support, so that it does not fall due to the weight of the strip-shaped extrudate. It is possible to prevent a dimensional change caused by a drop impact.
[0012]
In addition, since the lower surfaces of the front and rear ends of the belt-like extrudate are suspended while being in contact with and supported by the belt-like extrudate support, it is possible to suppress dimensional changes caused by drooping due to the weight of the belt-like extrudate during suspension. .
[0013]
Furthermore, since the strip extrudate is retained on the strip extrudate support while keeping the distance between the lowermost end of the suspended strip extrudate and the strip extrudate support constant, the strip extrudate is retained on the strip extrudate support when suspended. It does not impair the effect of suppressing the dimensional change caused by sagging due to its own weight due to excessive retention and hindering the shape, or excessive separation between the strip extrudate and the strip extrudate support.
[0014]
Therefore, it becomes possible to improve the dimensional stability of the extrudate that is suspended and retained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0016]
FIG. 1 shows an example of a strip-shaped extrudate retention device according to the present invention. This retention device transports a strip-shaped extrudate X made of a strip-shaped unvulcanized rubber material continuously extruded from an extruder. It is installed between the front and rear conveyors A and B with different speeds, and the amount of stay of the belt-like extrudate X suspended between the front and rear conveyors A and B is changed to guarantee the difference in the transport speed between the front and rear conveyors A and B. is there.
[0017]
A deformable strip-shaped extrudate support 1 that supports the lower surface of the strip-shaped extrudate X is suspended between the front and rear conveyors A and B. As shown in FIG. 2, the belt-like extrudate support 1 has a configuration in which roll bodies 5 are arranged at predetermined intervals along the conveyance direction C between two sets of chains 3 arranged side by side (front and rear in the drawing). It has become. The roll body 5 is configured by rotatably arranging a plurality of rolls 9 at predetermined intervals along the longitudinal direction of the shaft body 7 fixed between the chains 3.
[0018]
Whereas the rear end 1A (the rear end of the chain 3) of the belt-like extrudate support 1 extending along the conveying direction C is a fixed end fixed in the vicinity of the rear conveyor B, The front end 1B of the extrudate support 1 (the front end of the chain 3) is a free end disposed in the vicinity of the front conveyor A so as to be movable up and down.
[0019]
The front end portion 3A of the chain 3 is folded back from above through a rotatable suspension shaft 11 disposed in the vicinity of the front conveyor A. The suspension shaft 11 is preferably configured to have a sprocket with which the chain 3 engages.
[0020]
A suspension adjusting means 13 capable of changing the suspension state of the belt-like extrudate support 1 is installed below the front end 3A. The suspension adjusting means 13 includes a linear body 15 such as a metal wire connected to the front end of the chain 3 and a reel body 17 that winds up the linear body 15.
[0021]
The reel body 17 is connected to a motor 19, and the linear body 15 can be wound and unwound by the operation of the motor 19, and the front end of the chain 3 is wound by unwinding and unwinding the reel body 17. Is moved up and down, so that the suspended state of the belt-like extrudate support 1 can be adjusted by changing it deeply or shallowly.
[0022]
In the vicinity of the chain 3, a distance detection sensor 21 that detects the distance between the strip-shaped extrudate X and the strip-shaped extrudate support 1 at the lowermost end X 1 of the suspended strip-shaped extrudate X is installed. The distance detection sensor 21 is configured to output a detection signal when the strip-shaped extrudate X approaches within a predetermined distance, and does not output a detection signal when it goes out of the predetermined distance. As shown in FIG. The chain 3 is attached to a deformable guide body 23 extending along the conveyance direction C.
[0023]
The guide body 23 is supported by the chains 3 on both sides, and is deformed following the deformation of the chain 3. The distance detection sensor 21 attached to the guide body 23 can be moved along the guide body 23 by its own weight, and is always located below the lowermost end X1 of the strip-like extrudate X.
[0024]
The distance detection sensor 21 is connected to control means 25 for controlling the suspension adjustment means 13. When the detection signal is input from the distance detection sensor 21, the control means 25 outputs a control signal for unwinding the linear body 15 from the reel body 17 to the suspension adjusting means 13, and suspends the belt-like extrudate support 1. Change the state to be deeper.
[0025]
Further, if no detection signal is input from the distance detection sensor 21, a control signal for winding the linear body 15 to the suspension adjusting means 13 is output, and the suspension state of the belt-like extrudate support 1 is changed to be shallow, The belt-like extrudate support 1 is made to follow the suspended state of the belt-like extrudate X, and the distance between the lowermost end X1 of the belt-like extrudate X and the belt-like extrudate support 1 is controlled to be a constant distance. .
[0026]
The control means 25 is connected to a front end detection sensor 27 that is installed on the front conveyor A side and detects that the front end of the strip-shaped extrudate X has reached the front conveyor A. Further, a rear end detection sensor 29 that is installed on the rear conveyor B side and detects that the rear end of the strip-like extrudate X passes the rear conveyor B is connected.
[0027]
The control means 25 makes the suspension adjusting means 13 wind the linear body 15 around the reel body 17 before the leading edge of the strip-shaped extrudate X is detected by the leading edge detection sensor 27, and moves the strip-shaped extrudate support body 1 back and forth. The conveyor A and B are controlled so as to be stretched without being loosened. When the tip detection sensor 27 detects the tip of the strip-like extrudate X, the control means 25 receives the input signal and outputs a control signal to the suspension adjustment means 13 based on the detection signal from the distance detection sensor 21.
[0028]
When the trailing end detection sensor 29 detects the rear end of the strip-like extrudate X, the control means 25 receives the input signal and keeps the suspension adjusting means 13 suspended from the strip-like extrudate support 1. Control to maintain. That is, the operation of the motor 19 is stopped, and the reel body 17 is locked at that position.
[0029]
In the vicinity of the belt-like extrudate support 1, a position detection sensor 31 for detecting the position of the lowest end X1 of the suspended belt-like extrudate X is installed. The position detection sensor 31 is composed of a potentiometer and is connected to the control means 25. In this potentiometer, its movable terminal (not shown) and the front end of the strip-shaped extrudate support 1 are connected via a connecting member 33 so that the movable terminal can move according to the elevation of the front end of the strip-shaped extrudate support 1. It has become.
[0030]
Position data of the lowermost end X1 of the strip-like extrudate X corresponding to the input signal from the potentiometer is input in advance to the control means 25, and the position of the lowermost end X1 of the strip-like extrudate X is obtained from the position data. is there.
[0031]
The drive motors A1 and B1 that operate the conveyors A and B are connected to a conveyance control means 35 that controls the conveyance speeds of the conveyors A and B, respectively. The transport control unit 35 is connected to the control unit 25.
[0032]
The control means 25 determines that the position of the lowermost end X1 of the strip-like extrudate X is below the preset lower limit position based on the input signal from the potentiometer, that is, if the staying amount is too large, the conveyance control is performed. A signal for instructing the stop of the rear conveyor B is output to the means 35, and an instruction signal for stopping the operation is sent to each device behind the rear conveyor B. When the signal is received from the control means 25, the conveyance control means 35 sends a stop signal to the drive motor B1 to stop the operation of the rear conveyor B.
[0033]
The following describes by that band-like extrudate residence methods of the above-mentioned retention tower.
[0034]
First, when the extrusion of the strip-like extrudate X is started by an unillustrated extruder, the motor 19 of the suspension adjusting means 13 is actuated in response to a control signal from the control means 25 to wind the linear body 15 around the reel body 17. Then, the belt-like extrudate support 1 is stretched without being suspended between the front and rear conveyors A and B.
[0035]
In this state, when the strip-shaped extrudate X that has been transported on the rear conveyor B is transported to the front conveyor A across the strip-shaped extrudate support 1, and the tip is detected by the tip detection sensor 27. The control means 25 outputs a signal to the conveyance control means 35, and the conveyance control means 35 receives the signal and sends a drive stop signal to the drive motor A1 of the front conveyor A. As a result, the belt-like extrudate X stays between the front and rear conveyors A and B.
[0036]
At the same time, the control means 25 starts accepting a detection signal from the distance detection sensor 21. In response to a detection signal from the distance detection sensor 21, a control signal is output to the suspension adjusting means 13, the linear body 15 is unwound from the reel body 17, and the front end of the belt-like extrudate support body 1 suspended by its own weight is thereby detected. The strip-shaped extrudate support 1 is suspended so that the distance between the bottom end X1 of the strip-shaped extrudate X that has started to stay and the strip-shaped extrudate support 1 becomes a constant distance.
[0037]
As shown in FIG. 1, the extrudate X that has started to be suspended is supported by the extrudate support 1 at the front and rear ends, while the bottom end X1 of the extrudate X and the extrudate support 1 It stays on the belt-like extrudate support body 1 that is gradually suspended deeply so that the distance is constant.
[0038]
Next, the drive motor A1 receives the signal from the conveyance control means 35, and the front conveyor A conveys the strip-like extrudate X to the next cutting step at a predetermined length at a higher conveyance speed than the rear conveyor B.
[0039]
Thereby, the amount of suspension of the strip-shaped extrudate X is reduced, and the lowermost end X1 of the strip-shaped extrudate X moves upward. Accordingly, when the detection signal from the distance detection sensor 21 is interrupted, the control means 25 outputs a control signal instructing the suspension adjusting means 13 to wind the linear body 15 around the reel body 17. As a result, the tip of the strip-shaped extrudate support 1 moves downward, the strip-shaped extrudate support 1 shallows its suspended state, follows the suspended state of the strip-shaped extrudate X, and has a constant distance from the lowest end X1. Move upward so that
[0040]
When the detection signal from the distance detection sensor 21 is input to the control means 25 while the belt-like extrudate X is being transported between the front and rear conveyors A and B, the suspension state of the belt-like extrudate support 1 is deepened, and the detection signal When there is no input, the suspended state of the belt-like extrudate support 1 is made shallower, and the belt-like extrudate support 1 is always followed by the suspended state of the belt-like extrudate X so as to keep the distance from the lowest end X1 constant. The strip extrudate X is retained on the strip extrudate support 1.
[0041]
When the extrusion in the extruder is completed and the trailing end of the strip-shaped extrudate X is detected by the trailing end detection sensor 29, the control means 25 stops the suspension adjusting means 13 in response to the detection signal, and the strip-shaped extrudate The support 1 is maintained in its suspended state. The rear end of the strip-shaped extrudate X that has passed through the rear conveyor A is transported to the front conveyor A side across the suspended strip-shaped extrudate support 1.
[0042]
According to the present invention described above, since the strip-shaped extrudate X is retained on the strip-shaped extrudate support 1, when the rear end portion of the strip-shaped extrudate X passes through the retaining device, it falls due to its own weight. Can be prevented. Therefore, the strip-shaped extrudate X is not pulled by the impact of the drop and the dimensional change does not occur.
[0043]
In addition, since the front and rear end lower surfaces of the strip-shaped extrudate X are suspended while being in contact with and supported by the strip-shaped extrudate support 1, the dimensional change caused by the droop due to the weight of the strip-shaped extrudate X during suspension is more than conventional. Can be suppressed.
[0044]
Moreover, since the strip extrudate X is retained on the strip extrudate support 1 while keeping the distance between the lowermost end X1 of the suspended strip extrudate X and the strip extrudate support 1 constant, Therefore, the effect of suppressing the above-described dimensional change is not impaired by excessively staying in the substrate and preventing the shape from being disturbed or excessive separation between the strip-shaped extrudate X and the strip-shaped extrudate support 1.
[0045]
Therefore, the dimensional stability of the belt-like extrudate X suspended and retained can be improved.
[0046]
In the present invention, the belt-like extrudate support 1 is a free end in which the rear end is fixed in the vicinity of the rear conveyor B and the front end is movably disposed in the vicinity of the front conveyor A in the above embodiment. Although it is configured to be an end, the rear end may be a free end and the front end may be a fixed end, and one end of the belt-like extrudate support 1 is fixed near one of the front and rear conveyors A and B The other end can be a free end that is arranged in the vicinity of the other conveyor so as to be movable up and down.
[0047]
Alternatively, both ends of the belt-like extrudate support 1 may be free ends, both end portions thereof may be folded back from above by a suspension shaft, and suspension adjusting means may be provided at both ends.
[0048]
The roll body 5 in the belt-like extrudate support 1 may have a configuration in which one horizontally long roll is rotatably attached to the shaft body 7, and the belt-like extrudate support 1 conveys the belt-like extrudate X. It is sufficient that the support has a configuration in which the frictional resistance at the portion in contact with the strip-shaped extrudate X is lowered to such an extent that there is no hindrance. For example, even if the endless strip-shaped member is wound around freely Good.
[0049]
As the distance detection sensor 21, any sensor may be used as long as it is configured to output a detection signal only when the strip-like extrudate X approaches within a predetermined distance as described above. A detection protrusion that can be projected and retracted is projected on the upper surface of the main body, and the detection protrusion is always elastically biased upward so that a detection signal is output when the detection protrusion is pushed by the belt-like extrudate X. A sensor with a simple configuration can be used.
[0050]
Alternatively, when a magnetic material such as a steel cord is embedded in the strip-like extrudate X, a proximity switch can be used. Further, the distance detection sensor 21 is not limited to the above-described one, and other sensors may be used as long as the distance between the lowermost end X1 of the suspended strip-like extrudate X and the strip-like extrudate support 1 can be detected. For example, an image reading device such as a camera may be used.
[0051]
When the image reading device is used, it is arranged so as to be separated from either the left or right side facing the belt-like extrudate X and the belt-like extrudate support 1, and the control means 25 outputs the image signal inputted from the image reading device. Based on this, the distance between the lowermost end X1 of the strip-shaped extrudate X and the strip-shaped extrudate support 1 is calculated, and a control signal is output to the suspension adjusting means 13 so that the distance becomes a predetermined constant distance. Can be configured.
[0052]
The position detection sensor 31 is not limited to the above-described potentiometer. For example, the position detection sensor 31 may be installed and used at a position where the image reading apparatus can be detected.
[0053]
As the leading edge detection sensor 27 and the trailing edge detection sensor 29, any sensor may be used as long as it can detect the leading edge and the trailing edge of the strip-like extrudate X.
[0054]
INDUSTRIAL APPLICABILITY The present invention is particularly suitable for a retention device used when cutting a strip-like unvulcanized rubber material used for tread rubber continuously extruded from an extruder in a pneumatic tire manufacturing process. However, it is of course not limited thereto.
[0055]
【The invention's effect】
As described above, in the present invention, when the strip extrudate is suspended, the distance between the lowermost end of the suspended strip extrudate and the strip extrudate support while supporting the lower surface of the strip extrudate with the strip extrudate support. Since the strip-shaped extrudate is retained while adjusting the suspended state of the strip-shaped extrudate support so as to be constant, the dimensional stability of the suspended strip-shaped extrudate can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an example of a strip-shaped extrudate retention device of the present invention.
2 is an enlarged plan view of a main part showing an example of a belt-like extrudate support in FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Belt-like extrudate support body 1A Rear end 1B Front end 3 Chain 5 Roll body 11 Suspension shaft 13 Suspension adjustment means 15 Linear body 17 Reel body 21 Distance detection sensor 25 Control means 27 Front end detection sensor 29 Rear end detection sensor 31 Position detection sensor A, B Conveyor before and after C Transport direction X Extrudate X1 Bottom end

Claims

A belt-like extrusion that is installed between front and rear conveyors that convey a belt-like extrudate and that changes the staying amount of the belt-like extrudate suspended between the front and rear conveyors to ensure a difference in the transportation speed of the front and rear conveyors. A material retention device,
A deformable strip extrudate support that supports the lower surface of the strip extrudate is suspended between the front and rear conveyors, and the suspension state of the strip extrudate support can be changed below the strip extrudate support. A suspension adjusting means is provided, and a distance detection sensor for detecting the distance between the strip extrudate and the strip extrudate support at the lowermost end of the suspended strip extrudate is installed, and a detection signal from the distance detection sensor is provided. A control means for controlling the suspension adjusting means so that the distance is constant, and one end of the belt-like extrudate support body is a fixed end fixed in the vicinity of one of the front and rear conveyors, while the other end is A strip-shaped extrudate retention device having a free end disposed in the vicinity of the other conveyor so as to be movable up and down and connecting the suspension adjusting means to the other end of the strip-shaped extrudate support .

A belt-like extrusion that is installed between front and rear conveyors that convey a belt-like extrudate and that changes the staying amount of the belt-like extrudate suspended between the front and rear conveyors to ensure a difference in the transportation speed of the front and rear conveyors. A material retention device,
A deformable belt-like extrudate support that supports the lower surface of the belt-like extrudate is suspended between the front and rear conveyors, and the belt-like extrudate support is placed in a predetermined direction along the conveying direction between the chains arranged side by side. A roll body that is rotatable at intervals is arranged, and a suspension adjusting means that can change a suspension state of the belt-like extrudate support is provided below the belt-like extrudate support, A distance detection sensor for detecting the distance between the strip-shaped extrudate and the strip-shaped extrudate support at the lowermost end is installed, and the distance of the suspension adjusting means is made constant based on a detection signal from the distance detection sensor. A strip-shaped extrudate retention device provided with a control means for controlling as described above.

A belt-like extrusion that is installed between front and rear conveyors that convey a belt-like extrudate and that changes the staying amount of the belt-like extrudate suspended between the front and rear conveyors to ensure a difference in the transportation speed of the front and rear conveyors. A material retention device,
A deformable strip extrudate support that supports the lower surface of the strip extrudate is suspended between the front and rear conveyors, and the suspension state of the strip extrudate support can be changed below the strip extrudate support. A suspension adjusting means is provided, and a distance detection sensor for detecting the distance between the strip extrudate and the strip extrudate support at the lowermost end of the suspended strip extrudate is installed, and a detection signal from the distance detection sensor is provided. And a control means for controlling the suspension adjusting means so that the distance is constant, and the distance detection sensor is movably attached to the belt-like extrudate support by its own weight.
Strip extrudate residence apparatus.

Belt-like extrusion that is installed between front and rear conveyors that convey belt-like extrudates, and that changes the retention amount of the belt-like extrudates suspended between the front and rear conveyors to ensure a difference in the conveyance speed of the front and rear conveyors. A material retention device,
A deformable strip extrudate support that supports the lower surface of the strip extrudate is suspended between the front and rear conveyors, and the suspension state of the strip extrudate support can be changed below the strip extrudate support. A suspension adjusting means is provided, and a distance detection sensor for detecting the distance between the strip extrudate and the strip extrudate support at the lowermost end of the suspended strip extrudate is installed, and a detection signal from the distance detection sensor is provided. And a control means for controlling the suspension adjusting means so that the distance is constant, and a rotatable suspension shaft in which the other end of the suspended strip-like extrudate support is disposed in the vicinity of the other conveyor. The suspension adjusting means is disposed below the other end, and the suspension adjusting means is connected to the other end of the belt-like extrudate support, and the linear body. Can be wound and unwound Strip extrudate residence apparatus configured to have an Lumpur body.

Belt-like extrusion that is installed between front and rear conveyors that convey belt-like extrudates, and that changes the retention amount of the belt-like extrudates suspended between the front and rear conveyors to ensure a difference in the conveyance speed of the front and rear conveyors. A material retention device,
A deformable strip extrudate support that supports the lower surface of the strip extrudate is suspended between the front and rear conveyors, and the suspension state of the strip extrudate support can be changed below the strip extrudate support. A suspension adjusting means is provided, and a distance detection sensor for detecting the distance between the strip extrudate and the strip extrudate support at the lowermost end of the suspended strip extrudate is installed, and a detection signal from the distance detection sensor is provided. And a control means for controlling the suspension adjusting means so that the distance is constant, and a position detection sensor comprising a potentiometer for detecting the position of the lowest end of the suspended belt-like extrudate is installed, and the potentiometer A strip-shaped extrudate retention device in which a movable terminal is movable in accordance with the elevation of the other end of the strip-shaped extrudate support .

A front end detection sensor that detects that the front end of the strip-like extrudate has reached the front conveyor is installed on the front conveyor side, and before the front end is detected by the front end detection sensor, the control unit controls the suspension adjustment unit. The belt-like extrudate support is controlled so as to be stretched between the front and rear conveyors, and after the tip detection by the tip detection sensor, the control means uses the detection signal from the distance detection sensor to detect the distance. The strip-shaped extrudate retention device according to any one of claims 1 to 5 , wherein the suspension adjusting means is controlled so that the value is constant.

A rear end detection sensor for detecting that the rear end of the strip-like extrudate passes through the rear conveyor is installed on the rear conveyor side, and the control means is detected by the rear end detection by the rear end detection sensor. The strip-shaped extrudate retention device according to any one of claims 1 to 6 , wherein the suspension adjusting means is controlled so that the strip-shaped extrudate support is maintained as it is.