JP4043020B2

JP4043020B2 - Adhesive tape coreless roll

Info

Publication number: JP4043020B2
Application number: JP2002196879A
Authority: JP
Inventors: 信彦佐藤; 誠園田
Original assignee: Teraoka Seisakusho Co Ltd
Current assignee: Teraoka Seisakusho Co Ltd
Priority date: 2002-07-05
Filing date: 2002-07-05
Publication date: 2008-02-06
Anticipated expiration: 2022-07-05
Also published as: JP2004035215A

Description

【０００１】
【発明の属する技術分野】
本発明は、片面粘着テープの無芯巻回物とその製造方法及びその製造装置に関する。特に、本発明は、基材の片面に粘着剤層を有する片面粘着テープの無芯巻回物とその製造方法及び製造装置に関する。
【０００２】
【従来の技術】
従来、粘着テープは厚さ０．５ｍｍ〜５ｍｍの円筒紙管や円筒プラスティックを芯材として巻回して提供されている。これは粘着テープ巻回物の形状をいつまでも円筒形に保って使い易くする目的と、粘着テープの自動製造設備が機械的強度のある芯を必要としていたことにある。
【０００３】
近年、環境への配慮から、芯材の体積、重量をできるだけ少なくし、ゴミとなる部分を少なくするための発明が各種提案されている。
たとえば、特開２００１−１２２５２４号公報にはフイルムなどを芯材とした粘着テープ巻回物が記載されているし、特開平９−２５５９２６号公報には、筒状のフィルムなどを芯材としたものが記載されている。しかし、これらの巻回物の場合も、粘着テープ本来の機能に含まれず、テープ使用後は不要になって最終的にはゴミになるマイナス資産である芯材を有している。
【０００４】
また、通常の粘着テープ巻回物の製造工程では、複数の芯材のそれぞれに、スリットして形成した複数の粘着テープを同時に巻回する方法が採られているが、この方法では、テープを巻回する前に巻取軸に複数の芯材を装着し、スリットされた粘着テープの流れの位置と各芯材の位置とを正確に一致させるという熟練を要する作業が必要である。この複数芯材の位置合せの際に少しでも位置ずれがある状態で巻回すると、隣接して巻回されている粘着テープが隣の芯材に重なってしまうため作業を中断しなければならない。このような事態を避けるためには、図４に示すようにスリットされた粘着テープを１本置きに２つの巻取軸に振り分けなければならず、装置が複雑化する。
【０００５】
また、スリットされた複数の粘着テープを同じ軸に巻回する場合、テープ厚さの微妙な差により巻回物外径が変化するため、全てのスリットされたテープの張力が一定とはならない。この外径変化は、粘着テープの厚さをできるだけ均一にすることにより減少させることが可能である。しかし、巻回を何度か繰り返していると、微妙な外径変化でもそれが累積され、巻き取りが出来なくなってしまうことが起こる。その解決策としては、巻き芯を巻き取り軸からあるトルクで滑らせる機構を設けることが挙げられるが、この機構は複雑であり、さらに小さな張力で巻回したい場合にはトルクの微調整が極めて難しい。
【０００６】
また、従来の芯材を有する粘着テープを製造する機械は、テープ巻回物の内径が芯材の内径で決まってしまうため、これを変更するには、芯材が紙であれば、紙管製造工程まで遡って紙管製造設備のシャフトを製作し、内径の異なる紙管を製造しなければならず、顧客の様々な巻回物形状の要求に迅速に対応できないという問題がある。
【０００７】
【発明が解決しようとしている課題】
本発明は、紙芯材（紙管）やプラスティック芯材はもちろん、フィルム芯材をも使わない、完全に粘着テープのみからなる巻巣・変形等の生じない粘着テープ無芯巻回物を提供することを目的とするものである。
特に、本発明は、粘着テープ巻回物の内径の変更に簡単に対処することができる粘着テープ無芯巻回物の製造方法と該製造方法を実施するための粘着テープ無芯巻回物の製造装置を提供することを目的とするものである。
【０００８】
【課題を解決するための手段】
上記目的を達成することができる本発明は、以下の各発明を包含する。
【０００９】
（１）基材の片面に粘着剤層を設けた片面粘着テープの無芯巻回物であって、該巻回物の中空部側に位置する片面粘着テープの巻き始め端部から最初の１周以上の部分が粘着剤層を外側として巻回され、次いで片面粘着テープが最初の１周以上の部分の巻回方向と反対方向に折り返され、それによって形成される折り返し端部を起点として片面粘着テープの残部が巻き始めの巻回方向と反対方向に粘着剤層を内側として巻回されていることを特徴とする片面粘着テープ無芯巻回物。
【００１０】
（２）片面粘着テープの前記粘着剤層を外側として巻回されている部分が、巻き始め端部から１周以上、２周以内の巻回部分であることを特徴とする（１）項記載の片面粘着テープ無芯巻回物。
【００１１】
（３）巻取軸上に粘着剤層を外側として片面粘着テープの巻き始め端部を仮固定して一周以上巻回し、次いで、片面粘着テープを折り返して折り返し端部を形成し、該折り返し端部から粘着剤層を内側として片面粘着テープ残部の巻回を行い、巻回終了後、巻取軸から片面粘着テープ巻回物を引き抜くことを特徴とする片面粘着テープ無芯巻回物の製造方法。
【００１２】
（４）片面粘着シート巻回物から繰り出される片面粘着シートを所定幅に切断して供給される並列する複数の片面粘着テープ群の各巻き始め端部を同一巻取軸上に粘着剤層を外側として仮固定して一周以上巻回し、次いで、巻取軸の回転を逆転させて各片面粘着テープを反対方向に折り返し、それによって形成された折り返し端部を起点として粘着剤層を内側として各片面粘着テープの残部の巻回を行い、巻回終了後、各片面粘着テープ巻回物を巻取軸から引き抜くことを特徴とする片面粘着テープ無芯巻回物の製造方法。
【００１３】
（５）前記折り返し端部から粘着剤層を内側として各片面粘着テープの残部の巻回を行う際に、前記折り返し端部から反対方向への巻回に先だって、巻取軸上の全ての片面粘着テープにおける弛みを解消して各片面粘着テープの張力を均等とし、引き続いて、粘着剤層が内側となっている状態で各片面粘着テープの残部の巻回を行うことを特徴とする（３）項又は（４）項に記載の片面粘着テープ無芯巻回物の製造方法。
【００１４】
（６）前記巻取軸上の全ての片面粘着テープにおける弛みを解消する操作は、巻取軸上の片面粘着テープのうち、もっとも弛みの大きい片面粘着テープに他の片面粘着テープと同様の張力が懸かるまで、他の片面粘着テープを引っ張り、それらの前記折り返し端部を巻回物外周面上で部分的に後退させる操作であることを特徴とする（５）項記載の片面粘着テープ無芯巻回物の製造方法。
【００１５】
（７）正転方向及び逆転方向に回転を切り替えることができ、巻取軸上に複数列の片面粘着テープの各基材面側端部を仮固定する手段を備えた片面粘着テープ巻取軸、片面粘着テープ巻取軸に片面粘着テープを１周以上の設定長さで巻回されたことを検知する片面粘着テープ巻回量検知装置、片面粘着テープ巻回量検知装置からの設定巻回量の検知情報によって前記巻取軸の回転方向を逆転させる巻取軸駆動制御装置、前記回転方向が逆転された際の巻取軸上の複数列の片面粘着テープに懸かる張力を検知する張力検知装置、巻取軸を公転させて巻取軸上の複数の片面粘着テープに懸かる張力が均等となるまで巻き戻すためのターレット軸及び張力検知装置からの指令によって複数列の片面粘着テープの巻取張力が均一となるように前記ターレット軸の回転を制御するターレット軸制御装置を有することを特徴とする片面粘着テープ無芯巻回物の製造装置。
【００１６】
（８）前記張力検知装置からの指令によって複数列の片面粘着テープの巻取張力が均等となるように全片面粘着テープの張力を制御する装置として、ダンサーロールをさらに有することを特徴とする（７）項記載の片面粘着テープ無芯巻回物製造装置。
【００１７】
（９）前記巻取軸は、直径方向に拡張・縮小可能なリーフタイプのエアシャフトを有することを特徴とする（７）項又は（８）項に記載の片面粘着テープ無芯巻回物の製造装置。
【００１８】
（１０）前記巻取軸は、片面粘着テープ端部を仮固定する手段として、摩擦係数の大きなゴム部材及び／又は剪断方向に強い粘着性を示すが垂直方向には殆ど粘着性を示さない粘着剤層が巻取軸上に設置されていることを特徴とする（７）項〜（９）項のいずれか１項に記載の片面粘着テープ無芯巻回物の製造装置。
【００１９】
【発明の実施の形態】
広幅の片面粘着シートの巻回物から繰り出され、スリットされた複数の並列する片面粘着テープ群を同一の巻取軸で巻回する場合、テープ厚さの微妙な差等により巻回数を重ねるにしたがって各巻回物間に外径差が生じ、全てのスリットされたテープの張力が一定でなくなり、各巻回物を均等に巻き取りすることができなることがある。本発明は、巻取の初期段階で各巻回物に巻き取られる片面粘着テープの張力が均等となるように調整することにより、前記のような張力の不均一の誤差を次の巻取工程に持ち越すことなくすることにより、巻き取りができなくなるようなことを防ぐものである。
以下、図面を参照して本発明の粘着テープ無芯巻回物とその製造方法及び装置を説明する。
【００２０】
図１は、本発明の一実施例である片面粘着テープ無芯巻回物の側面図であり、図２は、片面粘着テープ無芯巻回物の巻き始め端部と折り返し端部の状態を示す部分断面図である。
図３は、広幅の片面粘着シートを均等幅に切断して供給される並列する片面粘着テープの一群から本発明の片面粘着テープ無芯巻回物を同一巻取軸で製造する装置における巻取軸部分の巻回時の状態を示す図であり、図４は、並列する片面粘着テープから片面粘着テープ無芯巻回物を２本の巻取軸で製造する従来の装置における巻取軸部分の巻回時の状態を示す図である。
【００２１】
図５は、本発明の片面粘着テープ無芯巻回物の製造装置及び方法における粘着テープの巻取装置を説明する図である。また、図６は、本発明の片面粘着テープ無芯巻回物の製造装置における巻取軸の駆動機構を説明する図である。
図７は、並列する片面粘着テープの巻き始め部分で一方の片面粘着テープに弛みが生じている状態を示す図（イ）及び（ロ）と、一定の巻き取り後に巻き取り方向を反転させて折り返し端部を形成させた状態で一方の粘着テープ（図中、上方＝右側の粘着テープ）になお弛み（点線部分）が生じている状態を示す図（ハ）、及び該粘着テープに生じた弛みをとるために、弛みが生じていない粘着テープ側を、弛みが生じている粘着テープの弛みが解消されて両粘着テープに懸かる張力が均等となるまで巻き戻した場合の状態を示しており、特に各粘着テープの折り返し先端部に位置ずれが生じている状態を示す図（ニ）をそれぞれ示している。
図８は、巻取軸１２（１３）の固定２１へ片面粘着テープ１１の先端部固定領域２０を仮固定する場合の状態を示している。
【００２２】
図１及び図２において、符号１は片面粘着テープ無芯巻回物、２は折り返し端部、３は巻き始め端部、４は無芯巻回物の中空部、５は片面粘着テープ巻回物の内周面、６は片面粘着テープ巻回物の外周面、７は基材、８は粘着剤層を示す。
【００２３】
図１に示すように、片面粘着テープ無芯巻回物１は、片面粘着テープの端部３の固定領域を巻取軸（図示せず）面に仮固定した状態で、粘着剤層（８）の反対側の基材（７）側を内向きにして時計回り方向に１周以上となる位置まで巻回し、次いで該位置を折り返し端部２として巻回方向を逆転させ、以後は粘着剤層（８）を内向きに反時計回り方向に巻回して製造されており、最終的に基材（７）面が外側となっている片面粘着テープ無芯巻回物である。この構造の本発明の粘着テープ無芯巻回物は、その内周面５と外周面６ともに基材側であり、粘着性がない。
【００２４】
片面粘着テープ無芯巻回物の巻き始めにおける折り返し端部２の位置は、通常、巻き始めから１周以上の位置である。しかし、２周以上巻回した後の適当な位置とすることも可能である。但し、２周以上巻回して折り返した巻回物は、粘着テープを繰り出して使用した場合の最後の部分となる折り返し端部から巻き始め端部までの粘着テープ部分を効率良く利用することが困難であるばかりでなく、折り返し端部２までの巻回数が多くなると、巻回物の巻き姿が折り返し端部で突出した形状となることが多い。そのことからも、折り返し端部までの粘着テープの巻回長さは１周以上の部分が必要最小限となっているいることが望ましい。
通常、図２（イ）に示されるように巻き始め端部３を少し越えた位置であるか、図２（ロ）に示されるように、巻き始め端部と同じ位置であることが好ましく、特に図２（イ）の位置であると折り返し後の粘着テープの弛みの解消操作を行いやすいことから好ましい。
【００２５】
本発明の片面粘着テープ無芯巻回物は、上記のような折り返し端部で片面粘着テープを折り畳んで重ねた箇所の厚さが、そのまま巻回を重ねて巻回物を形成した場合の巻き姿に大きな影響を与えるほどに厚くなることのない厚さの基材を使用しているものであれば、巻回物製品としてこの折り返し部がほとんど目立たないものとなる。この理由は、巻取軸上の巻回物の巻き姿において、該折り返し端部に僅かな段差が生じているものとなったとしても、巻回物を巻取軸から引き抜いた状態では、該段差は芯材がない中空部（内周側）に現れて、巻回物外周は通常製品と同様に均一な円形外観となることにある。
【００２６】
次に、上記片面粘着テープ無芯巻回物の製造方法について説明する。前述したように、通常の芯材を使用した粘着テープ巻回物の場合は、図４に示すような広幅の粘着シート９を切断刃１０でスリットした片面粘着テープ１１，１１……を１本置きに２つの巻取軸１２に振り分けた状態で巻回して製造されているが、本発明の粘着テープ無芯巻回物の場合は、図５及び図６に示されるような装置によって巻き始めから一周以上の巻回後に巻回方向を逆転させる際に粘着テープの弛みを解消してしまうために、図３に示すような広幅の粘着テープ９を切断刃１０でスリットした状態で送られてくる並列する複数の粘着テープ１１を同一巻取軸に直接巻回して製造することができる。
【００２７】
図５及び図６の装置において、符号１２、１３は一方（図５では１３）が交換用として待機している巻取軸、１４は粘着シートの張力調整用のダンサーロール、１５は張力検知装置、１６はターレット軸、１７、１８は巻取軸１２と１３を独立に回転させる巻取軸駆動モーター、１９はターレット駆動モーターを示す。
【００２８】
図５に示すように、本発明の装置は、２本の巻取軸１２，１３を持ち、図６に示すように、この２本の巻取軸の中心でターレット軸１６が回転して２本の巻取軸を一体に公転させる構造である。２本の巻取軸１２、１３とターレット軸１６はそれぞれ独立したモーター１７，１８及び１９で回転される。
【００２９】
まず、第一の巻取軸１２に片面粘着テープ１１の基材側を当接し、粘着剤層を上向きにした状態でその先端固定領域（図７及び図８における符号２０）を巻取軸１２上の固定部（図８における符号２１）に仮固定し、１周と少し巻いた後、巻取軸１２の回転方向を逆転させて巻取軸上に巻き取られている片面粘着テープの折り返し端部（図１及び図２における符号２）を形成する。この時の片面粘着テープ１１の巻回量は、片面粘着テープ巻回量検知装置で検知し、予め設定された巻回量に達したら、巻取軸駆動装置を作動させて巻取軸の回転を逆転させる。この巻取軸回転後に全ての片面粘着テープ１１に懸かる張力は張力検知装置１５で検知され、いずれかの片面粘着テープに生じている弛みは張力の減少値Ｔとして検知される。張力減少値Ｔが検知されると、その情報はターレット軸制御装置及び／又はダンサーロール制御装置に送られる。
【００３０】
張力減少値Ｔがターレット軸制御装置に送られると、ターレット駆動モーター１９は巻取軸１２（及び１３）をターレット軸１６の回転によって公転させ、巻取軸から片面粘着シートを引っ張る方向に移動させ、巻取軸１２に巻き取られている粘着テープ群の中の弛みが生じていないか、又は弛みの程度が少ない片面粘着テープ群を引っ張って巻取軸から引き剥がし、弛みが最も大きい片面粘着テープの弛みが解消されて全片面粘着テープに懸かる張力が均等となるようにする。
【００３１】
この全片面粘着テープに懸かる張力を均等とする操作は、上述のようにターレット駆動モーター１９によって巻取軸を公転させる以外に、張力減少値Tをダンサーロール制御装置に送ることにより図５に示されているダンサーロール１４を矢印方向に移動させて片面粘着テープを引っ張ることによって行うこともできる。
全片面粘着テープに懸かる張力が均等となったことを検知すると、巻取軸は、巻き始め時とは反対方向に回転され、片面粘着テープ１１の粘着剤層８を内向きとした巻回操作が行われる。
【００３２】
巻取軸１２、１３は、図８に一例を示すように、リーフタイプのエアシャフトと同様にラグ２３とゴムチューブ２４を有し、ゴムチューブ２４に圧搾空気を圧入することによりラグ２３を押し上げて直径方向に拡張（外径が増大）させる機構を有している。また、この機構としては、他に知られているメカニカルタイプの方式を採用してもよい。巻取軸１２，１３の周面上の一部には摩擦係数が大きなゴム、あるいはせん断方向には強い粘着性を示すが、垂直方向には粘着性を示さない粘着テープ２５等が装着されており、その部分に吸引室２６、吸引口２７を有している固定部２１を構成している。
【００３３】
巻取軸１２，１３とターレット軸１６はそれぞれ独立したモーター１７，１８，１９により駆動され、いずれも正転、逆転が自在にできる。ダンサーロール１４はエアーシリンダーにより圧縮空気の圧力で駆動され、片面粘着テープの弛みを取る張力は、その空気圧力を電空変換器を経て電気制御することにより変化させて得られる。
【００３４】
本発明の片面粘着テープ無芯巻回物を製造するための巻回操作は、図８に示すように、まず、エアシャフトである巻取軸１２を設定された巻回物の内径と同一の径まで拡張（外径が大きい状態）し、巻取軸の固定部２１に片面粘着テープ端部の固定領域２０をその基材面（非粘着性面）を下にして乗せる。次に巻取軸内部の吸引室２６の圧力を下げることにより吸引口２７で片面粘着テープ端部の固定領域２０を吸引して固定する。さらに必要により、片面粘着テープ端部の固定領域２０の上部から圧縮空気を吹き付けて片面粘着テープ端部の固定領域２０と固定部２１の間に大きな摩擦力を発生させ、片面粘着テープ端部の固定領域２０を仮固定することもできる。片面粘着テープ面に吹き付ける圧縮空気は、巻取軸１２が回転し始めた後は不要になる。この状態で巻取軸１２を回転させることにより、片面粘着テープ端部の固定領域２０を巻取軸上に固定したままで、片面粘着テープにある程度の張力を加えながら粘着剤面を外側にして一周以上巻回する。
【００３５】
一回転以上巻き取ったのち、巻取軸の回転を反転させる。この時、巻取軸だけの制御では片面粘着テープ群全体が弛んでしまい全てのテープにシワが入ってしまう。本発明の装置及び方法では、巻取軸１２の回転を反転するときにターレット軸１６も回転させ（回転方向は正逆どちらでも良い）、片面粘着テープ群全体を引っ張ってこの巻取軸の反転時の弛みを取ってやる制御を行う。このときの片面粘着テープ全体の弛みは片面粘着テープ全体の張力減少値Ｔ₁として張力検出器１５に検出されるので、この値Ｔ₁を、テープの巻回物からの剥離力Ｆよりは小さいが、テープが弛まない程度の適当なテープ張力Ｔ＝Ｔ₁（Ｔ₁＜Ｆ)となるようにターレット回転速度を制御して弛みを取ることができる。テープの反転から１回転以上すると定常巻回操作になるので、ターレット軸１６はその位置で固定する。制御の方法は、ターレット軸１６を定速度で回転し、逆に巻取軸１２の回転数をテープ張力が一定になるように制御しても良い。
【００３６】
上記のように巻取軸の反転時のテープ全体の弛みを巻取軸１２のターレット回転（公転）で解消する場合、張力値Ｔ₁の程度によって回転角度が決まるため、定常巻回操作に入ったとき２本の巻取軸１２、１３の相対位置は一定に設定できないので、巻取軸１２、１３の相対位置を定位置として定常巻き取りを行わなくてはならない、という制約がある場合には、巻取軸を反転するときターレットの回転を行わず、このテープ全体の弛みをダンサーロール１４で取ることが好ましい。この場合も張力検出器１５で検出される張力Ｔ＝Ｔ₁を、剥離力Ｆよりは小さいがテープが弛まない程度（Ｔ₁＜Ｆ）となるようにエアシリンダーに供給する空気圧力を制御する。この空気圧制御は電空変換器を介して電気制御して行われる。
【００３７】
所定の長さの巻回が終了したら巻取軸の回転を停止し、片面粘着テープの基材面（非粘着性面）が他方の巻取軸１３と接するまでターレット軸１８を回転させる。そして、新しい巻取軸１３の固定部２１と片面粘着テープ端部の固定領域２０の基材面（非粘着性面）とが接するように回転軸１３を回転させて位置を合わせる。巻取軸の固定部２１が片面粘着テープ端部の固定領域２０を前記したように仮固定したら、巻回が終了している巻取軸１２上の巻回物と巻取軸１３上の前記仮固定部との間で片面粘着テープを切断し、引き続き、巻取軸１３によって前記巻取軸１２の場合と同様の巻回操作が行われて次の巻回物が製造される。
【００３８】
製造された片面粘着テープ巻回物１の巻取軸１２からの排出は、次の巻取軸１３が反転を終了して定常巻回操作を行っている間に行う。巻取軸１２への圧縮空気の供給を停止して外径を収縮させると、巻取軸の固定部２１と片面粘着テープ端部の固定領域２０における基材面との間には接触圧力が無くなり、摩擦力が消滅する。そうすると、片面粘着テープ無芯巻回物１と巻取軸１２との間には隙間ができるので、容易に片面粘着テープ無芯巻回物１を巻取軸１２から取り外すことができる。
【００３９】
広幅の片面粘着シートを切断刃でスリットして並列する複数の片面粘着テープ群として、同一巻取軸でこれらを一緒に巻回する場合に、各テープ間に弛みの差が生じた場合には、前述したように、図７に示される手順にしたがって各テープ間の弛みをとる操作が行われる。上述したように、巻取軸を反転したときにできるテープ全体の弛みは張力Ｔ＝Ｔ₁（Ｔ₁＜Ｆ)で吸収したが、各テープ間の弛みの差を解消する場合は、張力ＴをＴ＝Ｔ₂（Ｔ₂＞Ｆ)とし剥離力Ｆよりも大きくすることにより、図７の（イ）に示す特定の片面粘着テープの弛み２２を解消することができる。つまり、巻回したテープを少し巻き戻すことになるが、この際の巻き戻し量は、弛んでいない部分の方が弛んだ部分に比べて少し多くなり、その分、巻き始め部分が他の弛んだ片面粘着テープの弛みが解消されるまで少し巻き戻されることとなり、結果的にスリットされた全ての片面粘着テープの弛みがなくなる。そして、弛んでいたテープと弛んでいなかったテープでは、テープ折り返し端部２は図７（ニ）のように巻取軸１２の円周上でその位慣がずれることになることは前述したとおりである。
【００４０】
巻取軸１２で設定の長さの片面粘着テープを巻回した後、ターレット軸１６を回転させ片面粘着テープの基材面を巻取軸１３の固定部２１へ接触させ、真空吸引し、場合によっては圧縮空気を吹き付けて巻取軸１３へ密着させた後、巻取軸１２と巻取軸１３の間でテープを切断する。このとき巻取軸上には巻芯がないので巻芯とテープの位置を合わせる必要がない。
【００４１】
【発明の効果】
本発明に係る片面粘着テープ無芯巻回物は、巻回物最内周面、巻回物最外周面ともに基材面であって粘着性がないので、巻芯がある粘着テープと同様な方法で保存、携行、使用を行うことができる。また、巻回物をすべて粘着テープで構成しているので、使用した後の残存物が減少しゴミとなって廃棄する量が減少するし、廃棄するゴミも全てが巻き始め部分の粘着テープであるため、分別する必要がない。
また、自着力が小さく、粘着面同士の剥離が容易な粘着剤を使用している粘着テープを本発明の無芯巻回物とすると、巻回物全てを粘着テープとして使うことが可能で、ゴミがゼロとなる。
【００４２】
巻回物がすべて粘着テープであることにより、温度、湿度等外部の環境変化で発生する巻巣・ワン状変形等の発生も防ぎ、さらに、巻芯を有する粘着テープ巻回物の場合には芯材の抜け落ちが生起するような幅の狭い巻回物をも製造することができる。
【００４３】
また、巻芯のある粘着テープ巻回物では、その内径は巻芯の内径であるので、異なった内径の巻回物を生産するにはその部品である芯材の内径を変更する必要があるが、本発明の無芯巻回物は、粘着テープ巻回物を生産する工程で径を変更できる巻取軸を使用するだけで内径を自由に選択することができる。
【００４４】
また、旧来の粘着テープスリッター巻回物では、テープ端を巻芯に固定するので、巻芯とテープの位慣が微妙にずれていていると、粘着テープが隣接する巻芯にも巻回されてしまう不都合があり、２本の巻取軸に隣り合ったテープを振り分ける必要があったが、本発明の巻回装置では、１本の巻き取り軸に直接巻回することができるため、巻芯と粘着テープの位置合わせの必要でなく、その分、巻取工程が簡素化されていて作業効率が増大する。
【図面の簡単な説明】
【図１】本発明の片面粘着テープ無芯巻回物の側面図である。
【図２】本発明の片面粘着テープ無芯巻回物の巻き始め端部と折り返し端部の状態を示す２例の部分断面図である。
【図３】広幅の片面粘着シートを均等幅に切断して供給される並列する片面粘着テープ群から本発明の片面粘着テープ無芯巻回物を同一巻取軸で製造する装置における巻取軸部分の巻回時の状態を示す図である。
【図４】並列する片面粘着テープから片面粘着テープ無芯巻回物を２本の巻取軸で製造する従来の装置における巻取軸部分の巻回時の状態を示す図である。
【図５】本発明の片面粘着テープ無芯巻回物の製造装置及び方法における粘着テープの巻取装置を説明する図である。
【図６】本発明の片面粘着テープ無芯巻回物の製造装置における巻取軸の駆動機構を説明する図である。
【図７】粘着テープの巻き始め部分における弛みの発生状態と、弛みを解消した場合の各粘着テープにおける折り返し端部のずれの状態を示す図である。
【図８】巻取軸の外周面に粘着テープ端部を固定する機構を説明するための巻取軸の断面図である。
【符号の説明】
１：片面粘着テープ無芯巻回物、２：折り返し端部、３：巻き始め端部、４：無芯巻回物の中空部、５：片面粘着テープ巻回物の内周面、６：片面粘着テープ巻回物の外周面、７：基材、８：粘着剤層、９：粘着シート、１０：切断刃、１１：粘着テープ、１２，１３：巻取軸、１４：ダンサーロール、１５：張力検知装置、１６：ターレット軸、１７，１８：巻取軸駆動モーター、１９：ターレット駆動モーター、２０：片面粘着テープ端部の固定領域、２１：巻取軸の固定部、２２：粘着テープの弛み部、２３：ラグ、２４：ゴムチューブ、２５：摩擦係数の高いゴム材、２６：吸引室、２７：吸引口[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coreless wound product of a single-sided pressure-sensitive adhesive tape, a manufacturing method thereof, and a manufacturing apparatus thereof. In particular, the present invention relates to a coreless wound product of a single-sided pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer on one side of a substrate, a method for producing the same, and a production apparatus.
[0002]
[Prior art]
Conventionally, an adhesive tape is provided by winding a cylindrical paper tube or cylindrical plastic having a thickness of 0.5 mm to 5 mm as a core material. This is because the shape of the wound adhesive tape is kept cylindrical in order to make it easy to use, and the automatic manufacturing equipment for the adhesive tape requires a mechanically strong core.
[0003]
In recent years, various inventions for reducing the volume and weight of the core material as much as possible and reducing the portion that becomes dust have been proposed in consideration of the environment.
For example, Japanese Patent Application Laid-Open No. 2001-122524 describes a wound adhesive tape using a film or the like as a core material, and Japanese Patent Application Laid-Open No. 9-255926 uses a tubular film or the like as a core material. Things are listed. However, these rolls also have a core material that is not included in the original function of the adhesive tape and is a negative asset that becomes unnecessary after use of the tape and eventually becomes garbage.
[0004]
Moreover, in the manufacturing process of a normal adhesive tape wound product, a method of simultaneously winding a plurality of adhesive tapes formed by slitting on each of a plurality of core members is employed. Before winding, a plurality of core members are attached to the winding shaft, and a work requiring skill is required to accurately match the position of the slit adhesive tape flow with the position of each core member. If winding is performed in a state where there is even a slight misalignment during the alignment of the plurality of core members, the adhesive tape wound adjacently overlaps the adjacent core member, so the operation must be interrupted. In order to avoid such a situation, as shown in FIG. 4, it is necessary to distribute the slit adhesive tape to every other two winding shafts, which complicates the apparatus.
[0005]
In addition, when a plurality of slit adhesive tapes are wound on the same shaft, the wound article outer diameter changes due to a subtle difference in tape thickness, so that the tension of all slit tapes is not constant. This change in outer diameter can be reduced by making the thickness of the adhesive tape as uniform as possible. However, if the winding is repeated several times, even a slight change in the outer diameter is accumulated and it may become impossible to wind. One solution is to provide a mechanism that slides the winding core from the take-up shaft with a certain torque, but this mechanism is complicated and fine adjustment of the torque is extremely necessary when winding with a smaller tension. difficult.
[0006]
Moreover, since the inner diameter of the wound tape is determined by the inner diameter of the core material, the machine for manufacturing the adhesive tape having the conventional core material changes the paper tube if the core material is paper. The paper tube manufacturing equipment shaft must be manufactured retroactively to the manufacturing process, and paper tubes with different inner diameters must be manufactured, which poses a problem that it is not possible to quickly respond to the various requirements of the rolls of customers.
[0007]
[Problems to be solved by the invention]
The present invention provides a self-adhesive tape that does not use a paper core material (paper tube) or plastic core material but also a film core material, and is completely made of only an adhesive tape and does not cause a winding nest and deformation. It is intended to do.
In particular, the present invention provides a method for producing an adhesive tape uncore wound product that can easily cope with a change in the inner diameter of the adhesive tape wound product, and an adhesive tape uncore wound product for carrying out the production method. The object is to provide a manufacturing apparatus.
[0008]
[Means for Solving the Problems]
The present invention capable of achieving the above object includes the following inventions.
[0009]
(1) A single-sided adhesive tape cored wound product in which an adhesive layer is provided on one side of a substrate, the first one from the winding start end of the single-sided adhesive tape located on the hollow part side of the wound product More than the circumference part is wound with the adhesive layer as the outside, then the single-sided adhesive tape is folded back in the direction opposite to the winding direction of the first one or more parts, and one side is started from the folded end formed thereby A single-sided pressure-sensitive adhesive tape core-free wound product, wherein the remaining part of the pressure-sensitive adhesive tape is wound in the direction opposite to the winding direction at the beginning of winding with the pressure-sensitive adhesive layer inside.
[0010]
(2) Item (1), wherein the portion of the single-sided pressure-sensitive adhesive tape that is wound with the pressure-sensitive adhesive layer as the outside is a wound portion that is 1 round or more and 2 rounds or less from the winding start end. Single-sided adhesive tape coreless roll.
[0011]
(3) The winding start end of the single-sided adhesive tape is temporarily fixed on the winding shaft with the adhesive layer outside, and then wound one or more times, then the single-sided adhesive tape is folded to form a folded end, and the folded end Winding the remainder of the single-sided adhesive tape from the part with the adhesive layer on the inside, and after completion of the winding, draw the single-sided adhesive tape roll from the take-up shaft. Method.
[0012]
(4) A single-sided adhesive sheet fed from a roll of single-sided adhesive sheet is cut into a predetermined width and each winding start end of a plurality of parallel-sided single-sided adhesive tape groups supplied in parallel is provided with an adhesive layer on the same winding shaft. The outer side is temporarily fixed and wound one or more times, then the rotation of the take-up shaft is reversed and each single-sided adhesive tape is folded back in the opposite direction, and the adhesive layer as the inner side starting from the folded end formed thereby. A method for producing a single-sided adhesive tape coreless wound product, wherein the remaining part of the single-sided adhesive tape is wound, and each wound single-sided adhesive tape is pulled out from the take-up shaft after winding.
[0013]
(5) When winding the remaining part of each single-sided adhesive tape from the folded end to the inner side of the adhesive layer, all the one side on the take-up shaft prior to winding in the opposite direction from the folded end The looseness in the pressure-sensitive adhesive tape is eliminated, the tension of each single-sided pressure-sensitive adhesive tape is made equal, and subsequently, the remaining part of each single-sided pressure-sensitive adhesive tape is wound while the pressure-sensitive adhesive layer is inside (3). ) Or the method for producing a single-sided adhesive tape coreless roll according to (4).
[0014]
(6) The operation to eliminate the slack in all the single-sided adhesive tapes on the winding shaft is the same tension as that of other single-sided adhesive tapes. The single-sided adhesive tape uncore according to (5), which is an operation of pulling other single-sided adhesive tapes until they are hung and partially retracting the folded end portions on the outer peripheral surface of the wound product A method of manufacturing a roll.
[0015]
(7) Single-sided pressure-sensitive adhesive tape take-up shaft that can switch the rotation in the forward direction and reverse direction, and has means for temporarily fixing the base-side end portions of the single-sided adhesive tapes in a plurality of rows on the take-up shaft. A single-sided adhesive tape winding amount detection device for detecting that the single-sided adhesive tape has been wound around the single-sided adhesive tape take-up shaft with a set length of one or more turns, and a set winding from the single-sided adhesive tape winding amount detection device Winding shaft drive control device for reversing the rotation direction of the winding shaft according to the amount detection information, Tension detection for detecting the tension applied to a plurality of single-sided adhesive tapes on the winding shaft when the rotation direction is reversed Winding of multiple rows of single-sided adhesive tapes according to commands from the turret shaft and tension detector for rewinding the device, rewinding the winding shaft until the tension applied to the single-sided adhesive tape on the winding shaft is equalized The tar so that the tension is uniform. Apparatus for manufacturing a single-sided adhesive tape free core winding material, characterized in that it comprises a turret axis control device for controlling the rotation of Tsu bets axis.
[0016]
(8) The apparatus further comprises a dancer roll as a device for controlling the tension of all the single-sided adhesive tapes so that the winding tensions of the single-sided adhesive tapes in a plurality of rows are equalized by a command from the tension detection device ( The single-sided pressure-sensitive adhesive tape coreless roll manufacturing apparatus according to item 7).
[0017]
(9) The winding shaft has a leaf-type air shaft that can be expanded and contracted in the diametrical direction. The single-sided adhesive tape coreless wound product according to (7) or (8), Manufacturing equipment.
[0018]
(10) The winding shaft as a means for temporarily fixing the end portion of the single-sided adhesive tape, a rubber member having a large friction coefficient and / or an adhesive exhibiting strong adhesiveness in the shearing direction but hardly exhibiting adhesiveness in the vertical direction The apparatus for producing a single-sided adhesive tape coreless roll according to any one of (7) to (9), wherein the agent layer is installed on a winding shaft.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
When winding multiple parallel single-sided adhesive tapes that are drawn from a wide-width single-sided adhesive sheet and wound on the same winding shaft, the number of turns is increased due to subtle differences in tape thickness, etc. Therefore, there is a difference in outer diameter between the wound articles, and the tension of all the slit tapes is not constant, and the wound articles may not be wound evenly. The present invention adjusts the tension of the single-sided pressure-sensitive adhesive tape wound around each wound article at the initial stage of winding so that the tension non-uniformity error becomes the next winding process. By preventing the carry-over from occurring, it is possible to prevent the winding from being disabled.
Hereinafter, the pressure-sensitive adhesive tape coreless roll of the present invention, its manufacturing method and apparatus will be described with reference to the drawings.
[0020]
FIG. 1 is a side view of a single-sided adhesive tape coreless wound product according to an embodiment of the present invention, and FIG. 2 shows a state of a winding start end portion and a folded end portion of the single-sided adhesive tape coreless wound product. It is a fragmentary sectional view shown.
FIG. 3 shows a winding in an apparatus for producing a single-sided adhesive tape coreless wound product of the present invention from a group of juxtaposed single-sided adhesive tapes supplied by cutting a wide-sided single-sided adhesive sheet into a uniform width on the same winding shaft. FIG. 4 is a view showing a state when the shaft portion is wound, and FIG. 4 shows a winding shaft portion in a conventional apparatus for manufacturing a single-sided adhesive tape coreless wound product from two parallel winding single-sided adhesive tapes. It is a figure which shows the state at the time of winding.
[0021]
FIG. 5 is a diagram illustrating an adhesive tape take-up device in a manufacturing apparatus and method for a single-sided adhesive tape coreless roll of the present invention. Moreover, FIG. 6 is a figure explaining the drive mechanism of the winding shaft in the manufacturing apparatus of the single-sided adhesive tape uncore wound product of this invention.
FIG. 7 is a diagram (a) and (b) showing a state in which one sided adhesive tape is slackened at the winding start portion of the paralleled one sided adhesive tape, and the winding direction is reversed after a certain amount of winding. Figure (c) showing a state in which a slack (dotted line part) is still occurring on one adhesive tape (upper side = adhesive tape on the right side) in the state where the folded end is formed, and occurred on the adhesive tape In order to remove the slack, the adhesive tape side that has not slackened is rewound until the slack of the loosened adhesive tape has been eliminated and the tension applied to both adhesive tapes has become equal. In particular, FIG. 2D shows a state in which a positional deviation has occurred at the folded tip of each adhesive tape.
FIG. 8 shows a state in which the tip end fixing region 20 of the single-sided adhesive tape 11 is temporarily fixed to the fixing 21 of the winding shaft 12 (13).
[0022]
1 and 2, reference numeral 1 is a single-sided adhesive tape coreless winding, 2 is a folded end, 3 is a winding start end, 4 is a hollow part of a coreless winding, and 5 is single-sided adhesive tape winding. The inner peripheral surface of the article, 6 is the outer peripheral surface of the single-sided adhesive tape roll, 7 is the base material, and 8 is the adhesive layer.
[0023]
As shown in FIG. 1, the single-sided adhesive tape coreless roll 1 has a pressure-sensitive adhesive layer (8) in a state where the fixing region of the end 3 of the single-sided adhesive tape is temporarily fixed to the surface of a winding shaft (not shown). ), The substrate (7) side opposite to the inside is wound inward to a position that makes one or more turns in the clockwise direction, and then the winding direction is reversed using the position as the folded end 2, and thereafter the adhesive. It is a single-sided pressure-sensitive adhesive tape core-less wound product that is manufactured by winding the layer (8) inwardly in the counterclockwise direction, and finally the base material (7) surface is the outside. The adhesive tape coreless wound product of the present invention having this structure has both an inner peripheral surface 5 and an outer peripheral surface 6 on the substrate side, and has no adhesiveness.
[0024]
The position of the folded end 2 at the beginning of winding of the single-sided adhesive tape coreless roll is usually one or more rounds from the start of winding. However, an appropriate position after winding two or more rounds is also possible. However, it is difficult to efficiently use the adhesive tape portion from the folded end portion to the winding start end portion, which is the last portion when the adhesive tape is unwound and used after being wound by turning it twice or more times. In addition to this, when the number of turns to the folded end 2 increases, the wound form of the wound product often has a shape protruding at the folded end. For this reason as well, it is desirable that the winding length of the adhesive tape up to the folded end is a minimum required for a portion of one turn or more.
Usually, it is preferably a position slightly beyond the winding start end 3 as shown in FIG. 2 (a) or the same position as the winding start end as shown in FIG. 2 (b). In particular, the position shown in FIG. 2 (a) is preferable because the loosening operation of the adhesive tape after folding can be easily performed.
[0025]
The single-sided adhesive tape coreless roll of the present invention has a thickness when the single-sided adhesive tape is folded and overlapped at the folded end as described above, and the roll is wound as it is to form a roll. If a base material having a thickness that does not become so thick as to have a great influence on the appearance is used, the folded portion is hardly noticeable as a wound product. The reason for this is that, even if a slight step is generated at the folded end in the winding form of the wound material on the winding shaft, in the state where the wound material is pulled out from the winding shaft, The step appears in a hollow portion (inner peripheral side) without a core material, and the outer periphery of the wound product has a uniform circular appearance like a normal product.
[0026]
Next, the manufacturing method of the said single-sided adhesive tape coreless winding is demonstrated. As described above, in the case of an adhesive tape roll using a normal core material, one single-sided adhesive tape 11, 11,... Slitting a wide adhesive sheet 9 as shown in FIG. It is manufactured by winding it in a state of being distributed to the two winding shafts 12, but in the case of the self-adhesive tape coreless wound product of the present invention, the winding is started by an apparatus as shown in FIGS. In order to eliminate the slack of the adhesive tape when reversing the winding direction after winding more than one turn, the wide adhesive tape 9 as shown in FIG. A plurality of adhesive tapes 11 arranged in parallel can be directly wound around the same winding shaft.
[0027]
5 and 6, reference numerals 12 and 13 are winding shafts that are waiting for replacement (13 in FIG. 5), 14 is a dancer roll for adjusting the tension of the adhesive sheet, and 15 is a tension detector. , 16 is a turret shaft, 17 and 18 are winding shaft drive motors for independently rotating the winding shafts 12 and 13, and 19 is a turret drive motor.
[0028]
As shown in FIG. 5, the apparatus of the present invention has two take-up shafts 12 and 13, and as shown in FIG. 6, the turret shaft 16 rotates around the center of the two take-up shafts. It is a structure in which the take-up shaft of the book is integrally revolved. The two winding shafts 12 and 13 and the turret shaft 16 are rotated by independent motors 17, 18 and 19, respectively.
[0029]
First, the base side of the single-sided adhesive tape 11 is brought into contact with the first winding shaft 12, and the tip fixing region (reference numeral 20 in FIGS. 7 and 8) is placed on the winding shaft 12 with the adhesive layer facing upward. After temporarily fixing to the upper fixing part (reference numeral 21 in FIG. 8) and winding it a little around one turn, the rotation direction of the winding shaft 12 is reversed and the single-sided adhesive tape wound up on the winding shaft is folded back. An end (reference numeral 2 in FIGS. 1 and 2) is formed. The winding amount of the single-sided adhesive tape 11 at this time is detected by the single-sided adhesive tape winding amount detection device, and when the winding amount reaches a preset winding amount, the winding shaft driving device is operated to rotate the winding shaft. Reverse. The tension applied to all the single-sided adhesive tapes 11 after rotation of the winding shaft is detected by the tension detector 15, and the slack that occurs in any one-sided adhesive tape is detected as a decrease value T of the tension. When the tension decrease value T is detected, the information is sent to the turret shaft control device and / or dancer roll control device.
[0030]
When the tension reduction value T is sent to the turret shaft control device, the turret drive motor 19 revolves the winding shaft 12 (and 13) by the rotation of the turret shaft 16 and moves it in the direction of pulling the single-sided adhesive sheet from the winding shaft. The single-sided adhesive having the largest slackness is obtained by pulling the single-sided adhesive tape group with little slack in the adhesive tape group wound around the winding shaft 12 or pulling it off from the winding shaft. The slack of the tape is eliminated, and the tension applied to the all-sided adhesive tape is made uniform.
[0031]
The operation of equalizing the tension applied to this single-sided adhesive tape is shown in FIG. 5 by sending a tension reduction value T to the dancer roll control device in addition to revolving the winding shaft by the turret drive motor 19 as described above. It is also possible to move the dancer roll 14 in the direction of the arrow and pull the single-sided adhesive tape.
When it is detected that the tension applied to the entire single-sided adhesive tape is uniform, the winding shaft is rotated in the direction opposite to that at the start of winding, and the winding operation is performed with the adhesive layer 8 of the single-sided adhesive tape 11 facing inward. Is done.
[0032]
As shown in FIG. 8, the take-up shafts 12 and 13 have a lug 23 and a rubber tube 24 like a leaf type air shaft, and press the compressed air into the rubber tube 24 to push up the lug 23. And a mechanism for expanding in the diametrical direction (increasing the outer diameter). As this mechanism, other known mechanical type systems may be adopted. A part of the peripheral surface of the winding shafts 12 and 13 is provided with rubber having a large friction coefficient, or adhesive tape 25 or the like that exhibits strong adhesiveness in the shear direction but does not exhibit adhesiveness in the vertical direction. The fixed portion 21 having the suction chamber 26 and the suction port 27 is formed in that portion.
[0033]
The winding shafts 12 and 13 and the turret shaft 16 are driven by independent motors 17, 18 and 19, respectively. The dancer roll 14 is driven by the pressure of compressed air by an air cylinder, and the tension for removing the slack of the single-sided adhesive tape is obtained by electrically controlling the air pressure through an electropneumatic converter.
[0034]
As shown in FIG. 8, the winding operation for producing the single-sided adhesive tape coreless roll of the present invention is the same as the inner diameter of the roll set with the winding shaft 12 being an air shaft. Expand to the diameter (in a state where the outer diameter is large), and place the fixing region 20 at the end of the single-sided adhesive tape with the base material surface (non-adhesive surface) down on the fixing portion 21 of the winding shaft. Next, the fixing area 20 at the end of the single-sided adhesive tape is sucked and fixed by the suction port 27 by lowering the pressure of the suction chamber 26 inside the winding shaft. Further, if necessary, compressed air is blown from the upper part of the fixing area 20 at the end of the single-sided adhesive tape to generate a large frictional force between the fixing area 20 and the fixing part 21 at the end of the single-sided adhesive tape. The fixing region 20 can be temporarily fixed. The compressed air sprayed on the single-sided adhesive tape surface becomes unnecessary after the winding shaft 12 starts to rotate. By rotating the take-up shaft 12 in this state, the adhesive surface is made outward while applying a certain amount of tension to the single-sided adhesive tape while the fixing region 20 at the end of the single-sided adhesive tape is fixed on the take-up shaft. Wind more than one turn.
[0035]
After winding up more than one turn, reverse the rotation of the winding shaft. At this time, when only the take-up shaft is controlled, the entire single-sided adhesive tape group is loosened and all the tapes are wrinkled. In the apparatus and method of the present invention, when the rotation of the winding shaft 12 is reversed, the turret shaft 16 is also rotated (the rotation direction may be either forward or reverse), and the entire single-sided adhesive tape group is pulled to reverse the winding shaft. Controls to take the slack of time. The slack of the entire single-sided adhesive tape at this time is the tension reduction value T of the entire single-sided adhesive tape. ₁ This value T is detected by the tension detector 15 as ₁ Is an appropriate tape tension T = T that is smaller than the peel force F from the wound tape but does not loosen the tape. ₁ (T ₁ It is possible to remove slack by controlling the turret rotation speed so that <F). When the rotation of the tape is reversed one or more times, a steady winding operation is performed, so the turret shaft 16 is fixed at that position. As a control method, the turret shaft 16 may be rotated at a constant speed, and conversely, the rotational speed of the winding shaft 12 may be controlled so that the tape tension becomes constant.
[0036]
When the slack of the entire tape when the winding shaft is reversed as described above is eliminated by the turret rotation (revolution) of the winding shaft 12, the tension value T ₁ Since the rotation angle is determined by the degree of rotation, the relative position of the two winding shafts 12 and 13 cannot be set constant when the regular winding operation is started. When there is a restriction that the winding must be performed, it is preferable to take the slack of the entire tape with the dancer roll 14 without rotating the turret when the winding shaft is reversed. Also in this case, the tension T = T detected by the tension detector 15 ₁ Is smaller than the peel force F but not to loosen the tape (T ₁ The air pressure supplied to the air cylinder is controlled so that <F). This air pressure control is performed by electrical control via an electropneumatic converter.
[0037]
When the winding of the predetermined length is completed, the rotation of the winding shaft is stopped, and the turret shaft 18 is rotated until the base material surface (non-adhesive surface) of the single-sided adhesive tape comes into contact with the other winding shaft 13. Then, the rotating shaft 13 is rotated and aligned so that the fixing portion 21 of the new winding shaft 13 and the base material surface (non-adhesive surface) of the fixing region 20 at the end of the single-sided adhesive tape are in contact with each other. When the fixing part 21 of the winding shaft temporarily fixes the fixing region 20 at the end of the single-sided adhesive tape as described above, the wound material on the winding shaft 12 that has been wound and the above-mentioned on the winding shaft 13. The single-sided adhesive tape is cut between the temporary fixing portion, and the winding operation similar to that of the winding shaft 12 is subsequently performed by the winding shaft 13 to produce the next wound product.
[0038]
The manufactured single-sided pressure-sensitive adhesive tape roll 1 is discharged from the take-up shaft 12 while the next take-up shaft 13 finishes reversal and performs a regular winding operation. When the supply of compressed air to the winding shaft 12 is stopped and the outer diameter is contracted, a contact pressure is applied between the fixing portion 21 of the winding shaft and the base material surface in the fixing region 20 at the end of the single-sided adhesive tape. It disappears and the frictional force disappears. If it does so, since a clearance gap will be made between the single-sided adhesive tape coreless winding material 1 and the winding shaft 12, the single-sided adhesive tape coreless winding material 1 can be easily removed from the winding shaft 12.
[0039]
When a wide single-sided adhesive sheet is wound with a cutting blade and wound together as a group of multiple single-sided adhesive tapes, when there is a difference in slack between the tapes, As described above, an operation for removing the slack between the tapes is performed in accordance with the procedure shown in FIG. As described above, the slack of the entire tape that is generated when the winding shaft is reversed is the tension T = T. ₁ (T ₁ <F) When absorbing the difference in slack between the tapes, the tension T is set to T = T ₂ (T ₂ By setting it to> F) and making it larger than the peeling force F, it is possible to eliminate the slack 22 of the specific single-sided adhesive tape shown in FIG. In other words, the wound tape will be rewound slightly, but the amount of unwinding at this time will be slightly larger in the unsloppy part than in the loosened part, and the winding start part will be loosened by other parts. However, the slack of the single-sided adhesive tape is slightly rewound until the slack of the single-sided adhesive tape is eliminated, and as a result, all of the slitted single-sided adhesive tape is free from slack. As described above, with respect to the tape that has been loosened and the tape that has not been loosened, the tape folding end portion 2 is shifted in its inertia on the circumference of the winding shaft 12 as shown in FIG. It is as follows.
[0040]
After winding a single-sided adhesive tape of a set length on the winding shaft 12, the turret shaft 16 is rotated to bring the base material surface of the single-sided adhesive tape into contact with the fixing portion 21 of the winding shaft 13, and vacuum suction is performed. In some cases, after compressed air is blown into close contact with the winding shaft 13, the tape is cut between the winding shaft 12 and the winding shaft 13. At this time, since there is no winding core on the winding shaft, it is not necessary to align the position of the winding core and the tape.
[0041]
【The invention's effect】
The single-sided pressure-sensitive adhesive tape coreless wound product according to the present invention is the same as a pressure-sensitive adhesive tape with a core because the innermost circumferential surface of the wound material and the outermost circumferential surface of the wound material are both base materials and are not sticky. It can be stored, carried and used in any way. In addition, since all the wound items are made of adhesive tape, the amount of waste remaining after use is reduced and the amount of waste discarded is reduced. There is no need to separate them.
In addition, if the self-adhesive force is small and the adhesive tape using an adhesive that is easy to peel off between the adhesive surfaces is a coreless wound product of the present invention, it is possible to use the entire wound product as an adhesive tape, There is no garbage.
[0042]
Since the wound material is all adhesive tape, it prevents the occurrence of winding nests and one-shaped deformation caused by external environmental changes such as temperature and humidity, and in the case of adhesive tape wound material with a core It is also possible to manufacture a narrow wound product that causes the core material to fall off.
[0043]
Moreover, since the inner diameter of the wound adhesive tape roll with a core is the inner diameter of the core, it is necessary to change the inner diameter of the core material, which is a component, in order to produce a roll with a different inner diameter. However, the coreless wound material of the present invention can freely select the inner diameter simply by using a winding shaft whose diameter can be changed in the process of producing the adhesive tape wound material.
[0044]
In addition, in the conventional adhesive tape slitter rolls, the tape end is fixed to the core, so that the adhesive tape is wound around the adjacent core if the core and tape are slightly misaligned. However, in the winding device of the present invention, it is possible to wind directly on one winding shaft. It is not necessary to align the core and the adhesive tape, and the winding process is simplified correspondingly and the working efficiency is increased.
[Brief description of the drawings]
FIG. 1 is a side view of a single-sided adhesive tape coreless roll of the present invention.
FIG. 2 is a partial cross-sectional view of two examples showing the state of the winding start end and the folded end of the single-sided adhesive tape coreless roll of the present invention.
FIG. 3 is a winding shaft in an apparatus for manufacturing single-sided adhesive tape coreless wound articles of the present invention from the parallel single-sided adhesive tape groups supplied by cutting wide single-sided adhesive sheets into a uniform width on the same winding shaft. It is a figure which shows the state at the time of winding of a part.
FIG. 4 is a diagram showing a winding state of a winding shaft portion in a conventional apparatus that manufactures a single-sided adhesive tape coreless wound product from two parallel-sided single-sided adhesive tapes.
FIG. 5 is a view for explaining a pressure-sensitive adhesive tape winding device in an apparatus and method for manufacturing a single-sided pressure-sensitive adhesive tape coreless roll of the present invention.
FIG. 6 is a view for explaining a winding shaft driving mechanism in the single-sided adhesive tape coreless roll manufacturing apparatus of the present invention.
FIG. 7 is a diagram showing a state of occurrence of slack at the winding start portion of the adhesive tape and a state of deviation of the folded end portion of each adhesive tape when the slack is eliminated.
FIG. 8 is a cross-sectional view of the take-up shaft for explaining a mechanism for fixing the end of the adhesive tape to the outer peripheral surface of the take-up shaft.
[Explanation of symbols]
1: single-sided adhesive tape coreless wound material 2: folded end portion 3: winding start end portion 4: hollow portion of coreless wound material 5: inner peripheral surface of single-sided adhesive tape wound material 6: Single-sided adhesive tape outer peripheral surface, 7: base material, 8: adhesive layer, 9: adhesive sheet, 10: cutting blade, 11: adhesive tape, 12, 13: winding shaft, 14: dancer roll, 15 : Tension detector, 16: turret shaft, 17, 18: take-up shaft drive motor, 19: turret drive motor, 20: fixing area at one end of adhesive tape, 21: fixing portion of take-up shaft, 22: adhesive tape 23: Lug, 24: Rubber tube, 25: Rubber material with high friction coefficient, 26: Suction chamber, 27: Suction port

Claims

A single-sided wound tape of a single-sided pressure-sensitive adhesive tape provided with an adhesive layer on one side of the substrate, the first one or more rounds from the winding start end of the single-sided pressure-sensitive adhesive tape located on the hollow side of the wound material The part is wound with the pressure-sensitive adhesive layer as the outside, and then the single-sided adhesive tape is folded back in the direction opposite to the winding direction of the first one or more rounds. A single-sided pressure-sensitive adhesive tape uncore wound product, wherein the remaining portion is wound in the direction opposite to the winding direction at the beginning of winding, with the pressure-sensitive adhesive layer inside.

The single-sided pressure-sensitive adhesive tape according to claim 1, wherein a portion of the single-sided pressure-sensitive adhesive tape that is wound with the pressure-sensitive adhesive layer outside is a wound portion that is wound at least 1 round and within 2 rounds from the winding start end. Uncore roll.

The winding start end of the single-sided adhesive tape is temporarily fixed on the winding shaft with the adhesive layer outside, and then wound one or more times. Then, the single-sided adhesive tape is folded back to form a folded end, and the folded end is adhered. A method for producing a single-sided adhesive tape coreless wound product, comprising winding the remaining part of a single-sided adhesive tape with the agent layer on the inside, and pulling out the single-sided adhesive tape roll from the take-up shaft after the end of winding.

A single-sided adhesive sheet fed from a roll of single-sided adhesive sheet is cut to a predetermined width and each winding start end of a plurality of juxtaposed single-sided adhesive tape groups arranged in parallel is placed on the same winding shaft with the adhesive layer as the outside. Fix and wind one or more rounds, then reverse the rotation of the winding shaft to fold back each single-sided adhesive tape in the opposite direction, and use the adhesive layer as the inside starting from the folded end formed thereby, each single-sided adhesive tape A method for producing a single-sided pressure-sensitive adhesive tape-free wound product, comprising: winding the remaining portion of the tape and pulling out each single-sided pressure-sensitive adhesive tape roll from the take-up shaft after the end of winding.

When winding the remaining part of each single-sided adhesive tape with the adhesive layer inside from the folded end, prior to winding in the opposite direction from the folded end, in all single-sided adhesive tapes on the winding shaft 5. The slack is eliminated, the tension of each single-sided adhesive tape is made equal, and subsequently, the remaining part of each single-sided adhesive tape is wound while the adhesive layer is inside. The manufacturing method of the single-sided adhesive tape coreless winding thing of description.

The operation to eliminate the slack in all the single-sided adhesive tapes on the winding shaft is the same as the other single-sided adhesive tape on the single-sided adhesive tape with the largest slack among the single-sided adhesive tapes on the winding shaft. The single-sided pressure-sensitive adhesive tape uncore wound product according to claim 5, wherein the other-sided pressure-sensitive adhesive tape is an operation of pulling other one-sided pressure-sensitive adhesive tapes and partially retracting the folded end portions of the wound product on the outer peripheral surface Production method.

Single-sided adhesive tape take-up shaft, single-sided adhesive provided with means for temporarily fixing each substrate side end of a plurality of rows of single-sided adhesive tape on the take-up shaft, which can be switched in the forward direction and reverse direction Single-sided adhesive tape winding amount detection device that detects that a single-sided adhesive tape has been wound around the tape take-up shaft for a set length of one or more turns, and detection of the set winding amount from the single-sided adhesive tape winding amount detection device A winding shaft drive control device that reverses the rotation direction of the winding shaft according to information, a tension detection device that detects tension applied to a plurality of single-sided adhesive tapes on the winding shaft when the rotation direction is reversed, and a winding The winding tension of multiple rows of single-sided adhesive tapes is uniform according to commands from the turret shaft and tension detector to rewind the take-up shaft until the tension applied to multiple single-sided adhesive tapes on the take-up shaft becomes equal. The turret to be Apparatus for manufacturing a single-sided adhesive tape free core winding material, characterized in that it comprises a turret axis control device for controlling the rotation.

The apparatus further comprises a dancer roll as a device for controlling the tension of all the single-sided adhesive tapes so that the winding tensions of the single-sided adhesive tapes in a plurality of rows are equalized by a command from the tension detecting device. Single-sided adhesive tape coreless wound product manufacturing equipment.

The said winding axis | shaft has the leaf type air shaft which can be expanded and contracted in a diameter direction, The manufacturing apparatus of the single-sided adhesive tape coreless winding thing of Claim 7 or 8 characterized by the above-mentioned.

As the means for temporarily fixing the end of the single-sided adhesive tape, the winding shaft has a rubber member having a large friction coefficient and / or a pressure-sensitive adhesive layer that exhibits strong adhesiveness in the shear direction but hardly exhibits adhesiveness in the vertical direction. It is installed on the winding shaft, The manufacturing apparatus of the single-sided adhesive tape coreless winding thing of any one of Claims 7-9 characterized by the above-mentioned.