JP2004305931A

JP2004305931A - Application apparatus

Info

Publication number: JP2004305931A
Application number: JP2003104026A
Authority: JP
Inventors: Susumu Takahashi; 進高橋; Takumi Ichikawa; 太空美市川; Yoshiaki Hamano; 賀朗濱野
Original assignee: Inoue Kinzoku Kogyo Co Ltd
Current assignee: Inoue Kinzoku Kogyo Co Ltd
Priority date: 2003-04-08
Filing date: 2003-04-08
Publication date: 2004-11-04
Anticipated expiration: 2023-04-08
Also published as: JP3991226B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide an application apparatus capable of selecting a small-size roller as an application roller in the application apparatus which forms an application liquid layer on the outer peripheral surface of the application roller rotating in the direction opposite to the travelling direction of a substrate and reversely transfers the application liquid layer on the surface of the substrate. <P>SOLUTION: This application apparatus is provided with the application roller 2 having a base material contact region C with which a base material W travelling in the direction opposite to the rotation direction of a roller outer peripheral surface 2a is in wrapped contact and a base material non-contact region D with which the base material W is not in contact, formed on the roller outer peripheral surface 2a which is drive-rotated, and a die 5 which delivers application liquid E to the roller outer peripheral surface 2a on the base material non-contact region D. Therein, the diameter of the roller outer peripheral surface 2a is selected in the range of 20 mm-100 mm, preferably in the range of 20 mm-50 mm, a supporting tool 5 which supports the roller outer peripheral surface 2a so as not to move the same is disposed on the outside of the base material non-contact region D of the roller outer peripheral surface 2a and on the upstream side in the rotation direction of the roller outer peripheral surface 2a and a delivery port 5a and a metering surface 5b of the die 5 are disposed on the downstream side in the rotation direction of the roller outer peripheral surface 2a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、塗工ロールの外周面に、塗工ロールのロール外周面に所定層厚みの塗工液層を形成すると共に、塗工ロールの回転方向と逆方向へ走行する基材の表面に、塗工液層を転写するリバース方式の塗工装置に関するものであり、塗工ロール外周面の直径が２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択される小径に係るものである。
【０００２】
【従来の技術】
従来、リバース方式の塗工装置には、駆動回転するロール外周面に、該ロール外周面の回転方向と逆方向へ走行するシート状の基材が巻き掛け接触する基材接触領域と該基材が接触しない基材非接触領域とを形成した塗工ロールと、該基材非接触領域において該ロール外周面に塗工液を吐出する吐出口及び該ロール外周面との間で計量用間隙を形成する計量面を有するダイとを備えたものがある（公知文献１）。この塗工装置は、塗工ロールに接触しつつ走行する基材の表面に、塗工ロールの外周面にダイで形成した所定層厚みの塗工液層をリバース方式で転写することにより、基材の表面に塗工層を形成するものである。
【０００３】
【特許文献１】
特開２００１−２７６７１１公報
【０００４】
【発明が解決しようとする課題】
基材の表面に、塗工ロールの外周面に形成された塗工液層をリバース方式で確実に転写するためには、塗工ロールの外周面に対する基材の押し付け圧力を大きくする必要がある。この要請に応える一つの方法としては、基材の張力を大きくすることが挙げられるが、基材の張力に上限があるため限界がある。他の方法としては、塗工ロールの直径を小径にすることが挙げられる。
【０００５】
しかし、塗工ロールは、自重による撓みと、ロール外周面とダイの計量面の間の計量用間隙に浸入した塗工液の液圧力による撓みとが発生するが、塗工の精度を低下させないようにするためには、ロール外周面が大径（例えば、直径が２００ｍｍ〜３００ｍｍ）のものを選択して、これら撓み量を小さくせねばならない。そのために、従来は、塗工ロールとして、ロール外周面の直径が２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択される小径のものを選択することが不可能であった。
【０００６】
そこで、本発明は、塗工ロールとして、ロール外周面の直径が２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択される小径のものを選択することができるリバース方式の塗工装置の提供を目的とする。
【０００７】
【課題を解決するための手段】
塗工ロールに小径のものを選択できるようにするために請求項１記載の本発明が採用した手段は、駆動回転するロール外周面に、該ロール外周面の回転方向と逆方向へ走行する基材が巻き掛け接触する基材接触領域と該基材が接触しない基材非接触領域とを形成した塗工ロールと、該基材非接触領域の外側に配置されて該ロール外周面との間で計量用間隙を形成する計量面を有する計量具とを備えた塗工装置であって、前記ロール外周面の直径が２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択され、前記ロール外周面の基材非接触領域の外側に、前記ロール外周面の回転方向の上流側から下流側に向かって、前記計量面からの反力及び前記塗工ロールの自重に抗して前記ロール外周面を移動しないように支持する支持具と、前記ロール外周面に塗工液を供給する塗工液供給具と、前記計量具とをこの順番で配置したことを特徴とする塗工装置である。
【０００８】
請求項１記載の本発明にあっては、直径が２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択された曲げ剛性の小さな塗工ロールであっても、塗工ロールの自重及び計量用間隙に浸入した塗工液の液圧力により生じた計量面から反力を支持具で支持することで、これら自重及び反力による塗工ロールの撓みを生じさせず、仮に撓みが生じたとしても撓み量を塗工精度に悪い影響を及ばさない程度に小さくできる。
【０００９】
円滑な塗工を確保するために請求項２記載の本発明が採用した手段は、前記支持具は、前記ロール外周面の回転方向の上流側に、前記ロール外周面に接するブレード先端を介して前記計量面からの反力を受ける清掃ブレードを備えた請求項１記載の塗工装置である。
本発明にあっては、基材に対する塗工液の転写の終わった回転するロール外周面が支持具へ浸入する直前に、ロール外周面に残留する塗工液を清掃ブレードで除去できる。
【００１０】
扱い易くするために請求項３記載の本発明が採用した手段は、前記塗工液供給具は、前記ロール外周面に塗工液を吐出する吐出口を備え、一組のダイの先端に、該吐出口及び該吐出口に隣接した前記計量面を備えた請求項１又は２記載の塗工装置である。
本発明にあっては、吐出口及び計量面が一体化される。
【００１１】
装置全体をコンパクトにするために請求項４記載の本発明が採用した手段は、前記支持具の一部とダイの一部を一体化して、この一体化した部分とダイの他部との境界に、前記吐出口に通じる塗工液案内通路を形成した請求項３記載の塗工装置である。
本発明にあっては、支持具とダイが一体化される。
【００１２】
構造を簡単にして扱い易くするために請求項５記載の本発明が採用した手段は、前記支持具のうち、前記塗工ロールの自重に抗して前記ロール外周面を移動しないように支持する部分及び前記塗工液供給具が、前記塗工ロールの下方に配置されて前記塗工ロールの外周面を支持する塗工液のピックアップロールからなる請求項１又は２記載の塗工装置である。
本発明にあっては、塗工ロールの支持と、塗工ロールの外周面への塗工液の供給とがピックアップロールで兼用できる。
【００１３】
基材走行路へ基材を通すときに基材の安定走行を確保するために請求項６記載の本発明が採用した手段は、前記塗工ロールより前記基材走行方向の下流側に、走行基材に接する案内位置から接しない待機位置まで進退自在に案内ロールを配置した請求項１乃至請求項５のいずれか１項に記載の塗工装置である。
本発明にあっては、塗工前に基材走行路へ基材を通すときには、基材を案内位置の案内ロールで案内させ、塗工するときには、案内ロールを待機位置へ後退させることで塗工層に案内ロールを接触させないようにできる。
【００１４】
【発明の実施の形態】
以下、本発明に係る塗工装置（以下、「本発明塗工装置」という）を図面に示す実施の形態に基づいて説明する。
【００１５】
（第１の実施の形態）
図１乃至図５は本発明塗工装置の第１の実施の形態を示すものであり、図１は本発明塗工装置１と別の塗工装置Ｋとからなる塗工設備Ｊの要部を断面した右側面図、図２は塗工設備Ｊの平面図、図３（Ａ）は本発明塗工装置１の要部を拡大し且つ断面した右側面図、同図（Ｂ）は塗工ロール２の外側の領域を説明する側面図、図４はダイ５を揺動調節した後の要部を拡大し且つ断面した右側面図、図５は塗工ロール２のロール外周面２ａに作用する外力を説明するための拡大した右側面図である。
【００１６】
本実施の形態に係る塗工設備Ｊは、図１乃至図３に示す如く、紙，合成樹脂フィルム，金属箔等からなるシート状の基材Ｗの両表面Ｗａ，ｗｂに対して塗工を行うものであり、本発明塗工装置１と別の塗工装置Ｋとからなる。
【００１７】
本発明塗工装置１は、駆動回転する塗工ロール２と、塗工ロール２のロール外周面２ａを移動させないように支持する支持具６と、ロール外周面２ａに塗工液を供給する塗工液供給具４（図３参照）と、ロール外周面２ａとの間で計量用間隙Ｇ（図５参照）を形成する計量具３とを備えている。塗工液供給具４及び計量具３は、一体化されて一組のダイ５から形成され、ロール外周面２ａに供給した塗工液を計量して塗工液層Ｆを形成する。
【００１８】
前記塗工ロール２は、左右に長く延設されて下半側が後から前へ向かって駆動回転する回転方向が矢符Ａ方向のロール外周面２ａに、ロール外周面２ａの回転方向（矢符Ａ方向）と逆方向（矢符Ｂ方向）へ走行する基材Ｗが巻き掛け接触する基材接触領域Ｃと基材Ｗが接触しない基材非接触領域Ｄとを形成してある。前記支持具６は、ロール外周面２ａの基材非接触領域Ｄにおける後側上半部から後側下半部を介して前側下半部に至る箇所（図３（Ｂ）参照）の外側に設けられ、ロール外周面２ａを支持して上下前後方向へ移動しないようにしてある。前記ダイ５は、図５に示す如く、基材非接触領域Ｄにおいてロール外周面２ａに塗工液Ｅを吐出する吐出口５ａ及びロール外周面２ａとの間で計量用間隙Ｇを形成する計量面５ｂを備えている。吐出口５ａは塗工液供給具４を構成し、計量面５ｂは計量具３の計量面となる。
【００１９】
本発明塗工装置１は、前記ロール外周面２ａの基材非接触領域Ｄの外側に、ロール外周面２ａの回転方向（矢符Ａ方向）の上流側から下流側に向かって、計量面５ｂからの反力及び塗工ロール２の自重に抗してロール外周面２ａを移動しないように支持する支持具６と、ロール外周面２ａに塗工液Ｅを供給する塗工液供給具４と、計量具３とをこの順番で配置してある。
【００２０】
前記塗工ロール２は、図５に示す如く、ロール外周面２ａの直径Ｈが２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択され。ロール外周面２ａは、凹凸のない平滑なもの、グラビアの凹部が彫刻されたもの、またはワイヤーを巻回したものが塗工液の種類や塗工量等に応じて選択される。塗工ロール２は、図２に示す如く、両端が軸受部材９，９を介して基盤１０に固定され、一端に軸継手１１を介して回転駆動装置（図示略）が接続されている。回転駆動装置は、塗工ロール２の回転速度を変更できる可変式のものや、回転速度が固定されたものが選択される。塗工ロール２は、図１に示す如く、ロール回転方向（矢符Ａ方向）と逆方向（矢符Ｂ方向）へ走行する基材Ｗの一方の表面Ｗａに、ダイ５でロール表面２ａに形成した塗工液層Ｆをリバース方式で転写して、塗工層Ｍを形成する。
【００２１】
前記ダイ５は、図３に示す如く、前記ロール外周面２ａの基材非接触領域Ｄにおける前側下半部から前側上半部へ至る領域（同図（Ｂ）参照）の適宜箇所の外側に、吐出口５ａおよび計量面５ｂを配置してある。ダイ５は、塗工ロール２の回転中心線２ｂに沿う左右方向に延びており、その本体５ｃの内部に、左右方向に延びるマニホールド５ｄ及び塗工液案内通路（スロットノズル）５ｅとが形成され、マニホールド５ｆから延設した塗工液案内通路５ｅの終端となる吐出口５ａが、左右方向に延びる剛性の大きな先端リップ部５ｆの脇に開口し、先端リップ部５ｆに塗工ロール２の外周面２ａと対面する計量面５ｂが形成されている。
ロール外周面２ａと計量面５ｂとの間には、計量用間隙Ｇ（図５参照）が形成されている。この計量用間隙Ｇは、側面を楔状に形成して塗工ロール２の回転方向へ行く程に厚み寸法（ロール外周面２ａと計量面５ｂとの距離）が小さくできるようになっている。
【００２２】
前記ダイ５は、左右の支持台１２，１２（図２参照）に、左右の位置調整機構（図示略）を介して支持されており、この位置調整機構の調整により、計量用間隙Ｇの厚み寸法（ロール外周面２ａと計量面５ｂとの距離）を塗工条件に応じて最適値に設定できるようになっている。更に、位置調整機構は、図４に示す如く、計量面５ｂを中心としてダイ本体５ｃを揺動できるようになっており、計量面５ｂの角度を調整することで計量用間隙Ｇの形状を変更できるようにしてある。
【００２３】
前記ダイ５は、図３に示す如く、塗工液供給装置（図示略）に配管接合され、塗液供給装置から供給された塗工液Ｅをマニホールド５ｄで左右方向へ拡散させた後にスロットノズル５ｅを通過させて吐出口５ａから左右方向全域に亘って均一に吐出させ、回転中の塗工ロール２の外周面２ａに供給すると共に、塗工ロール２の回転に伴い前記計量用隙間Ｇ（図５参照）へ浸入した塗工液Ｅを計量面５ｂで計量して、ロール外周面２ａに塗工液層Ｆを形成する。計量面５ｂは、計量用間隙Ｇの厚み寸法や形状を変更することで、計量用間隙Ｇに浸入した塗工液Ｅに適度の剪断力を付与して平滑な塗工液層Ｆを形成することができる。塗工液Ｅは、間隙寸法が設定値に固定された計量用間隙Ｇへ浸入するのに伴い加圧され、その液圧力でロール外周面２ａに分布荷重を加え、押圧力Ｐ１（図５参照）で押圧する。この押圧力Ｐ１は、固定した前記計量面５ｂの反力であって、塗工液Ｅを介してロール外周面２ａへ加えられる力である。
【００２４】
前記支持具６は、図３に示す如く、第１支持具７と第２支持具８とからなる。
第１支持具７は、塗工ロール２の基材非接触領域Ｄにおいてロール外周面２ａの下半部側と接して、塗工ロール２を回転自在に支持するようにしてある。第１支持具７は、塗工ロール２の自重による分布荷重を支持して、塗工ロール２の自重による撓みを防止する。第１支持具７は、横断面がＶ字状又はＵ字状（図示略）のロール受け溝７ａが左右方向へ延設され、ロール受け溝７ａの支持面７ｂ，７ｂで塗工ロール２を線接触又は面接触の状態で支持する。第１支持具７は、ロール受け溝７ａの底部に左右方向へ凹設した凹溝７ｃと、凹溝７ｃに連通する液通路７ｄと、ロール受け溝７ａ及び凹溝７ｃの左右両側を覆うシール部材７ｅ，７ｅ（図２参照）とを備え、塗液供給装置（図示略）から供給される塗工液Ｅと同じ液又は異なる液を液通路７ｄを介して凹溝７ｃ及びロール受け溝７ａへ導くようにしてある。この導かれた液は、ロール外周面２ａと第１支持具７の支持面７ｂ，７ｂとの間に浸入して潤滑の役割を発揮する。
【００２５】
前記第２支持具８は、図５に示す如く、前記計量用間隙Ｇに浸入した塗工液Ｅの液圧力で生じる前記押圧力Ｐ１に対抗できる反力を生じさせるものであり、ロール外周面２ａに接触して押圧力Ｐ２で押圧するものである。押圧力Ｐ２は、押圧力Ｐ１より大きくして、塗工ロール２の浮き上がを阻止できるようになっている。第２支持具８は、ロール外周面２ａにブレード先端８ａが接触する清掃ブレードで形成され、基材Ｗに塗工液層Ｆを転写した後のロール外周面２ａを清掃するようにしてある。ブレード先端８ａが接触する箇所は、第１支持具７及び第２支持具８からなる支持具６にロール外周面２ａが侵入を開始する入口箇所としてある。第２支持具８は、ロール外周面２ａにブレード先端８ａが接する位置が、塗工ロール２の回転中心２ｂより上方とすることにより、押圧力Ｐ２の下方へ向く分力Ｐ２ａで塗工ロール２を下方へ押圧して、前記支持具７でこの分力Ｐ２ａを支持させて塗工ロール２の浮き上がりを阻止できる。
【００２６】
本発明塗工装置１は、図１に示す如く、昇降装置１７に取り付けられ、上昇した塗工位置と降下した待機位置との間を昇降できるようになっている。また、塗工設備１は、本発明塗工装置１より基材Ｗの走行方向（矢符Ｂ方向）下流側に案内ロール１８を配置し、案内ロール１８を走行基材Ｗに接する案内位置（二点鎖線で示す位置）から接しない待機位置（実線で示す位置）まで進退するようになつている。基材走行路へ基材Ｗを最初に通すとき等の非塗工時には、基材Ｗを案内位置の案内ロール１８で案内させ、本発明塗工装置１で塗工して塗工層Ｍを得る塗工時には、案内ロール１８を待機位置へ後退させ、塗工層Ｍに案内ロール１８を接触させない。
【００２７】
前記別の塗工装置Ｋは、図１に示す如く、基材Ｗを巻き掛け案内する駆動回転するバックアップロール１３と、基材Ｗの他方の表面Ｗｂに塗工するダイ１５とを備えている。ダイ１５は、前記ダイ５と同様なものが選択される。別の塗工装置Ｋは、ダイ１５をグラビアロール又はキスロール等の塗工ロールに置換することも可能である。
【００２８】
前記本発明塗工装置１は、図５に示す如く、ダイ５の吐出口５ａから押し出された塗工液Ｅを、駆動回転する塗工ロール２のロール外周面２ａと計量面５ｂとの間に形成された計量用間隙Ｇへ浸入させて計量面５ｂで計量し、ロール外周面２ａに塗工液層Ｆを形成する。本発明塗工装置１は、他方の表面Ｗｂに別の塗工装置Ｋ（図１参照）で塗工された基材Ｗの一方の表面Ｗａに、塗工ロール２のロール外周面２ａに形成した塗工液層Ｆをリバース方式で塗工して塗工層Ｍを形成する。
【００２９】
前記本発明塗工装置１は、曲げ剛性の小さな塗工ロール２であっても、塗工ロール２の自重による分布荷重が第１支持具７で支持されると共に、計量用間隙Ｇに浸入した塗工液Ｅの液圧上昇で生じる計量面５ｂからの反力（押圧力Ｐ１）が第２支持具８で支持されるため、力の方向が異なる自重及び反力（押圧力Ｐ１）による塗工ロール２の撓み量を、塗工精度に悪い影響を及ばさない程度に小さくできる。
【００３０】
本発明塗工装置１は、塗工ロール２の直径Ｈが２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択される小径であるため、塗工ロール２のロール外周面２ａに対する基材Ｗの押し付け圧力（単位面積当たりの押圧力）を大きくすることが可能となり、ロール外周面２ａに形成した塗工液層Ｆをリバース方式で基材Ｗへ確実に転写して高い塗工精度を得ることができる。
【００３１】
走行する基材Ｗの張力に対して回転する塗工ロール２が与える影響は、塗工ロール２に巻き掛け接触する基材接触領域Ｃの円弧寸法と、基材接触領域Ｃにおいて基材Ｗの表面と塗工ロール２の間に形成される塗工液膜の厚み及び粘性とが特に重要である。塗工中の塗工液膜の粘性については、一定値に安定しているため、基材接触領域Ｃの円弧寸法が短く、且つ塗工液膜の厚みが薄い場合には、走行する基材Ｗの張力を増大させる傾向の影響が小さくなり、基材Ｗの走行も安定する。そこで、前記塗工ロール２の直径と基材接触領域Ｃの円弧寸法との関係を観たとき、塗工ロール２に巻き掛け接触する基材Ｗの巻き掛け角度θ（図１参照）が一定値の場合、塗工ロール２の直径が小さくなる程に、基材接触領域Ｃの円弧寸法も小さくなる。本発明塗工装置１における基材接触領域Ｃの円弧寸法は、塗工ロール２の直径Ｈが２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択される小径であるため、基材接触領域Ｃの円弧寸法も従来のロール外周面が大径（例えば、直径が２００ｍｍ〜３００ｍｍ）のものに比べて短くなる。また、前述の如く、塗工ロール２のロール外周面２ａに対する基材Ｗの押し付け圧力（単位面積当たりの押圧力）を大きくすることが可能となるため、基材接触領域Ｃにおいて基材Ｗの表面と塗工ロール外周面２ａと間に形成される塗工液膜の厚みも薄くできる。その結果、従来に比べて本発明塗工装置１の場合には、基材接触領域Ｃの円弧寸法が短く且つ塗工液膜の厚みが薄くなるため、走行する基材Ｗの左右幅方向の全域にわたって張力を増大させる傾向の影響が小さくなり、基材Ｗの走行を安定させて塗工状態を安定させることができ、高い塗工精度が得られる。
【００３２】
（第２の実施の形態）
図６は本発明塗工装置の第２の実施の形態を示すものであり、要部を断面した右側面図である。
【００３３】
本実施の形態に係る本発明塗工装置２１が前記第１の実施の形態に係る本発明塗工装置１（図１乃至図５参照）と大きく相違する箇所は、第１支持具７の一部とダイ５の一部を一体化して、この一体化した部分２２とダイ５の他部２３との境界に、吐出口５ａに通じる塗工液案内通路５ｅを形成したことである。この相違点以外の構成は、本発明塗工装置１と実質的に同一である。本発明塗工装置２１は、第１支持具７とダイ５とを共通の部材で構成できるため、装置全体をコンパクにでき、取り扱いが容易となる。
【００３４】
（第３の実施の形態）
図７は本発明塗工装置の第３の実施の形態を示すものであり、要部を断面した右側面図である。
【００３５】
本実施の形態に係る本発明塗工装置３１が前記第２の実施の形態に係る本発明塗工装置２１（図６参照）と大きく相違する箇所は、塗工ロール２の外周面２ａと面接触又は線接触する支持面８ｂが形成された固定のブロックで第２支持具８を形成したことである。この相違点以外の構成は、前記本発明塗工装置２１と実質的に同一である。
【００３６】
第１支持具７及び第２支持具８は、連結して一体化され、第１支持具７の一方の支持面７ｂと第２支持具８の支持面８ｂとで横断面Ｖ字状又はＵ字状（図示略）のロール受け溝３３を形成すると共に、ロール受け溝３３の底面に左右方向へ凹設した凹溝３４と、凹溝３４に連通する液通路３５と、ロール受け溝３３及び凹溝３４の左右両側を覆うシール部材（図示略）とを備え、塗液供給装置（図示略）から供給される塗工液Ｅと同じ液又は異なる液を液通路３５を介して凹溝３４及びロール受け溝３３へ導くようにしてある。この導かれる液は、ロール外周面２ａと両支持面７ｂ，８ｂとの間に浸入して潤滑及びロール外周面２ａの撓みの矯正の役割を発揮する。
【００３７】
（第４の実施の形態）
図８は本発明塗工装置の第４の実施の形態を示すものであり、（Ａ）は要部を断面した右側面図、（Ｂ）は計量面の近辺を拡大した右側断面図である。
【００３８】
本実施の形態に係る本発明塗工装置４１が前記第１の実施の形態に係る本発明塗工装置１（図１乃至図５参照）と大きく相違する箇所は、後半側に設けた第１支持具４７と第２支持具８とを一体化し、第１支持具４７と計量具４３との間に塗工液供給具４２を配置したことである。この相違点以外の構成は、前記本発明塗工装置１と実質的に同一である。
【００３９】
前記第１支持具４７は、塗工ロール２の自重による分布荷重を、ブロック４７ｅに形成した支持面４７ｂで支持して、塗工ロール２の自重による撓みを防止する。塗工液供給具４２は、塗工ロール外周面２ａとの間に塗工液Ｅの液溜空間４２ａを形成するブロック４２ｅと、塗工液Ｅを導く液通路４２ｄと、液通路４２ｄで導いた塗工液を液溜空間４２ａの幅方向（塗工ロール２の長手方向である左右方向）全域に分散させる凹溝４２ｃと、液溜空間４２ａ及び凹溝４２ｃの左右両側を覆うシール部材（図示略）とを備えている。塗工液供給具４２は、ブロック４２ｅと第１支持具４７のブロック４７ｅと接合する等して一体化してある。
【００４０】
前記計量具４３は、ロール外周面２ａとの間で計量用間隙Ｇを形成する計量面４３ｂを備え、塗工液供給具４２でロール外周面２ａに供給された塗工液を計量して塗工液層Ｆを形成する。計量具４３は、塗工ロール２の回転中心線に沿う左右方向に延びており、先端リップ部４３ｆに計量面４３ｂが形成されている。ロール外周面２ａと計量面４３ｂとの間には、計量用間隙Ｇが形成されている。この計量用間隙Ｇは、側面を楔状に形成して塗工ロール２の回転方向へ行く程に厚み寸法（ロール外周面２ａと計量面４３ｂとの距離）が小さくできるようになっている。計量用間隙Ｇの厚み寸法は、間隙調節装置４６で調節できるようになっている。
【００４１】
（第５の実施の形態）
図９は本発明塗工装置の第５の実施の形態を示すものであり、要部を断面した右側面図である。
【００４２】
本実施の形態に係る本発明塗工装置５１が前記第４の実施の形態に係る本発明塗工装置４１（図８参照）と大きく相違する箇所は、後半側に設けた第１支持具４７及び第２支持具８を連結して一体化し、第１支持具４７の支持面４７ｂと第２支持具８の支持面８ｂとで横断面Ｖ字状又はＵ字状（図示略）のロール受け溝３３を形成すると共に、ロール受け溝３３の底面に左右方向へ凹設した凹溝３４と、凹溝３４に連通する液通路３５と、ロール受け溝３３及び凹溝３４の左右両側を覆うシール部材（図示略）とを備え、塗液供給装置（図示略）から供給される塗工液Ｅと同じ液又は異なる液を液通路３５を介して凹溝３４及びロール受け溝３３へ導くようにしてある。この導かれる液は、ロール外周面２ａと両支持面４７ｂ，８ｂとの間に浸入して潤滑及びロール外周面２ａの撓みの矯正の役割を発揮する。
【００４３】
（第６の実施の形態）
図１０は本発明塗工装置の第６の実施の形態を示すものであり、要部を断面した右側面図である。
【００４４】
本実施の形態に係る本発明塗工装置６１が前記第１の実施の形態に係る本発明塗工装置１（図１乃至図５参照）と大きく相違する箇所は、第２支持具８と計量具４３との間に配置した第１支持具及び塗工液供給具を、塗工ロール２の下方に配置されて塗工ロール外周面２ａを支持する塗工液のピックアップロール６３で構成したことである。この相違点以外の第２支持具８及び塗工ロール２の構成は、前記本発明塗工装置１のものと実質的に同一であり、計量具４３の構成は、前記本発明塗工装置４１（図８参照）のものと実質的に同一である。
【００４５】
前記ピックアップロール６３は、その自重及び支持する塗工ロール２の自重により生じる撓み量が、塗工ロール外周面２ａに対する塗工液Ｅの供給の精度を低下させない許容範囲内となるように、ロール外周面６３ａの直径（例えば、直径が２００ｍｍ〜３００ｍｍ）を選択する。ピックアップロール６３は、適度の回転速度で強制駆動され、塗工ロール外周面２ａの回転方向（矢符Ａ方向）と逆方向（矢符Ｎ方向）へ回転するようになっている。ピックアップロール６３は、塗工液槽６７に回転するロール外周面６３ａが通過するのに伴い、ロール外周面６３ａに塗工液Ｅを付着させて塗工液層Ｑを形成する。回転するピックアップロール６３は、塗工液層Ｑを回転する塗工ロール２の外周面２ａへ転写して、該外周面２ａに塗工液層Ｒを形成する。塗工液層Ｒは、塗工ロール２の回転に伴い、計量具４３の計量面で４３ｂで計量されて塗工液層Ｆとなる。なお、塗工液を付着は、図示は省略したが、ダイ等のスリットから吐出する塗工液をロール外周面６３ａに付着させるようにしてもよい。
【００４６】
（第７の実施の形態）
図１１は本発明塗工装置の第７の実施の形態を示すものであり、要部を断面した右側面図である。
【００４７】
本実施の形態に係る本発明塗工装置７１が前記第６の実施の形態に係る本発明塗工装置６１（図１０参照）と大きく相違する箇所は、第２支持具７８を凹溝付きの支持面７８ｂ，７８ｂで形成したことである。この相違点以外の構成は、前記本発明塗工装置６１と実質的に同一である。
【００４８】
第２支持具７８は、塗工ロール２の外周面２ａを支持する支持面７８ｂ，７８ｂと、支持面７８ｂ，７８ｂの間に形成してロール外周面２ａに面する凹溝７８ａと、凹溝７８ａに連通する液通路７８ｄと、凹溝７８ｄの左右両側を覆うシール部材（図示略）とを備え、塗液供給装置（図示略）から供給される塗工液Ｅと同じ液又は異なる液を液通路７８ｄを介して凹溝７８ａへ導くようにしてある。
この導かれる液は、ロール外周面２ａと両支持面７８ｂ，７８ｂとの間に浸入して潤滑及びロール外周面２ａの撓みの矯正の役割を発揮する。
【００４９】
【発明の効果】
請求項１記載の本発明塗工装置は、直径が２０ｍｍ〜１００ｍｍ（好ましくは、２０ｍｍ〜５０ｍｍ）の範囲で選択され曲げ剛性の小さな塗工ロールを用いることができるので、塗工ロール外周面ヘ塗工液供給具で供給した塗工液を計量具で計量して得た塗工液層を、基材の表面に対してリバース方式で確実に転写することができ、高精度の塗工が可能となる。
【００５０】
請求項２記載の本発明塗工装置は、基材に対する転写の終わったロール外周面に残留する塗工液を、支持具へ侵入する前に清掃ブレードで除去できるので、円滑な塗工を確保できる。
【００５１】
請求項３記載の本発明塗工装置は、一組のダイで吐出口及び計量面を一体化するので、扱い易く塗工作業能率の向上が図れる。
【００５２】
請求項４記載の本発明塗工装置は、支持具とダイの一体化により装置をコンパクにでき、取り扱いが容易となる。
【００５３】
請求項５記載の本発明塗工装置は、ピックアップロールで塗工ロールの支持と塗工ロール外周面への塗工液供給とが兼用できるので、構造を簡単にして扱い易くできる。
【００５４】
請求項６記載の本発明塗工装置は、非塗工時に基材を案内位置の案内ロールで案内させることで、基材の安定走行を確保することができる。
【図面の簡単な説明】
【図１】本発明塗工装置の第１の実施の形態を示すものであり、本発明塗工装置と別の塗工装置とからなる塗工設備の要部を断面した右側面図である。
【図２】第１の実施の形態に係る塗工設備の平面図である。
【図３】（Ａ）は第１の実施の形態の本発明塗工装置の要部を拡大し且つ断面した右側面図、（Ｂ）は領域を説明する側面図である。
【図４】第１の実施の形態においてダイを揺動した後の要部を拡大し且つ断面した右側面図である。
【図５】第１の実施の形態において塗工ロールの外周面に作用する外力を説明するための拡大した右側面図である。
【図６】本発明塗工装置の第２の実施の形態を示すものであり、要部を断面した右側面図である。
【図７】本発明塗工装置の第３の実施の形態を示すものであり、要部を断面した右側面図である。
【図８】本発明塗工装置の第４の実施の形態を示すものであり、（Ａ）要部を断面した右側面図、（Ｂ）は計量面の近辺を拡大した右側断面図である。
【図９】本発明塗工装置の第５の実施の形態を示すものであり、要部を断面した右側面図である。
【図１０】本発明塗工装置の第６の実施の形態を示すものであり、要部を断面した右側面図である。
【図１１】本発明塗工装置の第７の実施の形態を示すものであり、要部を断面した右側面図である。
【符号の説明】
２…塗工ロール、２ａ…ロール外周面、３…計量具、４（４２）…塗工液供給具、５…ダイ、５ａ…吐出口、５ｂ…計量面、６…支持具、６３…ピックアップロール、Ｃ…基材接触領域、Ｄ…基材非接触領域、Ｗ…基材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention forms a coating liquid layer having a predetermined thickness on the outer peripheral surface of the coating roll on the outer peripheral surface of the coating roll, and on the surface of the base material traveling in a direction opposite to the rotation direction of the coating roll. The present invention relates to a reverse type coating apparatus for transferring a coating liquid layer, wherein the diameter of the outer peripheral surface of a coating roll is a small diameter selected in a range of 20 mm to 100 mm (preferably, 20 mm to 50 mm). .
[0002]
[Prior art]
Conventionally, a reverse-type coating apparatus includes a substrate contact area where a sheet-like substrate traveling in a direction opposite to the rotation direction of the roll outer peripheral surface is wound around the outer peripheral surface of the driving roll and makes contact therewith. A coating roll formed with a substrate non-contact area that does not come into contact, and a measurement gap between the discharge port that discharges a coating liquid onto the roll outer peripheral surface and the roll outer peripheral surface in the substrate non-contact area. There is a device provided with a die having a measuring surface to be formed (publicly known document 1). This coating apparatus is configured such that a coating liquid layer having a predetermined thickness formed by a die on an outer peripheral surface of a coating roll is transferred by a reverse method onto a surface of a base material traveling while being in contact with the coating roll. A coating layer is formed on the surface of the material.
[0003]
[Patent Document 1]
JP 2001-276711 A
[0004]
[Problems to be solved by the invention]
In order to reliably transfer the coating liquid layer formed on the outer peripheral surface of the coating roll to the surface of the substrate by the reverse method, it is necessary to increase the pressing pressure of the substrate against the outer peripheral surface of the coating roll. . One method of meeting this demand is to increase the tension of the substrate, but there is a limit because the tension of the substrate has an upper limit. Another method is to reduce the diameter of the coating roll.
[0005]
However, the coating roll causes bending due to its own weight and bending due to the liquid pressure of the coating liquid that has entered the measuring gap between the roll outer peripheral surface and the measuring surface of the die, but does not reduce the coating accuracy. In order to achieve this, it is necessary to select a roll having an outer peripheral surface having a large diameter (for example, a diameter of 200 mm to 300 mm) and reduce the amount of deflection. For this reason, conventionally, it was impossible to select a coating roll having a small diameter selected from a range of 20 mm to 100 mm (preferably, 20 mm to 50 mm) as the coating roll.
[0006]
Therefore, the present invention provides a reverse type coating apparatus which can select a coating roll having a small diameter selected from a range of 20 mm to 100 mm (preferably, 20 mm to 50 mm) in the outer peripheral surface of the roll. For the purpose of providing.
[0007]
[Means for Solving the Problems]
Means adopted by the present invention according to claim 1 is that, in order to be able to select a coating roll having a small diameter, the coating roll is provided on the outer peripheral surface of the roll to be driven and rotated in a direction opposite to the rotation direction of the outer peripheral surface of the roll. A coating roll having a base material contact area where the material is wound around and in contact with the base material and a base material non-contact area where the base material does not come into contact, and a coating roll disposed outside the base material non-contact area and between the roll outer peripheral surface A measuring tool having a measuring surface for forming a measuring gap in the coating device, wherein a diameter of the outer peripheral surface of the roll is selected in a range of 20 mm to 100 mm (preferably, 20 mm to 50 mm), Outside the substrate non-contact area of the outer peripheral surface, from the upstream to the downstream in the rotation direction of the outer peripheral surface of the roll, the outer periphery of the roll against the reaction force from the measuring surface and the own weight of the coating roll. A support to keep the surface from moving Ingredients and a coating liquid supply device for supplying the coating liquid to the roll outer surface, a coating apparatus characterized in that the said metering device arranged in this order.
[0008]
According to the present invention, even if the coating roll has a small bending stiffness selected in the range of 20 mm to 100 mm (preferably, 20 mm to 50 mm), the weight of the coating roll and the weight of the coating roll are measured. By supporting the reaction force with the support from the measuring surface generated by the liquid pressure of the coating liquid that has penetrated into the gap for use, the bending of the coating roll does not occur due to these own weight and the reaction force, and if the bending occurs temporarily Also, the amount of deflection can be reduced to such an extent that the coating accuracy is not adversely affected.
[0009]
Means adopted by the present invention according to claim 2 to ensure smooth coating is that the support is provided on the upstream side in the rotation direction of the outer peripheral surface of the roll, via a blade tip contacting the outer peripheral surface of the roll. The coating device according to claim 1, further comprising a cleaning blade that receives a reaction force from the measuring surface.
In the present invention, the coating liquid remaining on the outer peripheral surface of the roll can be removed by the cleaning blade immediately before the rotating outer peripheral surface of the rotating roll after the transfer of the coating liquid to the base material enters the support.
[0010]
Means adopted by the present invention according to claim 3 in order to facilitate handling, the coating liquid supply tool is provided with a discharge port for discharging a coating liquid on the outer peripheral surface of the roll, at the tip of a set of dies, The coating apparatus according to claim 1, further comprising the discharge port and the measuring surface adjacent to the discharge port.
In the present invention, the discharge port and the measuring surface are integrated.
[0011]
The means adopted by the present invention according to claim 4 for making the whole apparatus compact is that a part of the support and a part of a die are integrated, and a boundary between the integrated part and the other part of the die. 4. The coating device according to claim 3, wherein a coating liquid guide passage communicating with the discharge port is formed.
In the present invention, the support and the die are integrated.
[0012]
The means adopted by the present invention according to claim 5 for simplifying the structure and facilitating the handling is to support the supporting member so that the outer peripheral surface of the coating roll does not move against the own weight of the coating roll. 3. The coating apparatus according to claim 1, wherein the portion and the coating liquid supply device include a coating liquid pickup roll disposed below the coating roll and supporting an outer peripheral surface of the coating roll. 4. .
In the present invention, the pickup roll can be used for both supporting the coating roll and supplying the coating liquid to the outer peripheral surface of the coating roll.
[0013]
The means adopted by the present invention according to claim 6 in order to ensure stable running of the base material when passing the base material through the base material travel path, the base material runs downstream from the coating roll in the base material running direction. The coating device according to any one of claims 1 to 5, wherein a guide roll is disposed so as to be able to advance and retreat from a guide position in contact with the base material to a standby position not in contact with the base material.
According to the present invention, when the base material is passed through the base material traveling path before coating, the base material is guided by the guide roll at the guide position, and when coating is performed, the guide roll is retracted to the standby position to perform coating. The guide roll can be prevented from contacting the work layer.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a coating device according to the present invention (hereinafter, referred to as “the present coating device”) will be described based on an embodiment shown in the drawings.
[0015]
(First Embodiment)
1 to 5 show a first embodiment of the coating apparatus of the present invention, and FIG. 1 is a main part of a coating apparatus J including a coating apparatus 1 of the present invention and another coating apparatus K. 2 is a plan view of the coating equipment J, FIG. 3A is an enlarged right side view of a main part of the coating apparatus 1 of the present invention, and FIG. FIG. 4 is a right side view showing an enlarged and cross-sectional view of a main part after swinging adjustment of the die 5, and FIG. 4 is a view showing a roll outer peripheral surface 2 a of the coating roll 2. FIG. 4 is an enlarged right side view for explaining an external force that acts.
[0016]
As shown in FIGS. 1 to 3, the coating equipment J according to the present embodiment performs coating on both surfaces Wa and wb of a sheet-shaped substrate W made of paper, a synthetic resin film, a metal foil, or the like. This is performed by the coating apparatus 1 of the present invention and another coating apparatus K.
[0017]
The coating apparatus 1 of the present invention includes a coating roll 2 that is driven and rotated, a support 6 that supports the roll outer peripheral surface 2a of the coating roll 2 so as not to move, and a coating supply that supplies a coating liquid to the roll outer peripheral surface 2a. It includes a working liquid supply tool 4 (see FIG. 3) and a measuring tool 3 that forms a measuring gap G (see FIG. 5) between the roll outer peripheral surface 2a. The coating liquid supply device 4 and the measuring device 3 are integrally formed from a set of dies 5, and measure the coating liquid supplied to the roll outer peripheral surface 2a to form a coating liquid layer F.
[0018]
The coating roll 2 is extended to the left and right, and the rotation direction in which the lower half side is driven and rotated from back to front is indicated by an arrow A in the direction of the arrow A, and the rotation direction of the roll outer surface 2a (indicated by the arrow). (A direction) and a base material contact region C where the base material W traveling in the opposite direction (the direction of the arrow B) comes into contact with the base material W and a base material non-contact region D where the base material W does not contact. The support 6 is located outside of a portion (see FIG. 3 (B)) extending from the rear upper half to the front lower half via the rear lower half in the base material non-contact area D of the roll outer peripheral surface 2a. It is provided so as to support the roll outer peripheral surface 2a so as not to move in the vertical and longitudinal directions. As shown in FIG. 5, the die 5 forms a measuring gap G between the discharge port 5a for discharging the coating liquid E to the roll outer peripheral surface 2a and the roll outer peripheral surface 2a in the substrate non-contact region D. The surface 5b is provided. The discharge port 5 a constitutes the coating liquid supply device 4, and the measuring surface 5 b serves as a measuring surface of the measuring device 3.
[0019]
The coating apparatus 1 of the present invention is arranged such that a measuring surface 5b is provided on the outer peripheral surface 2a of the roll outside the non-substrate contact region D from the upstream side to the downstream side in the rotation direction (the direction of the arrow A) of the outer peripheral surface 2a. A support member 6 for supporting the roll outer peripheral surface 2a so as not to move against the reaction force from and the own weight of the coating roll 2, and a coating liquid supply device 4 for supplying the coating liquid E to the roll outer peripheral surface 2a. , And the measuring tool 3 are arranged in this order.
[0020]
As shown in FIG. 5, the coating roll 2 is selected so that the diameter H of the roll outer peripheral surface 2a is in the range of 20 mm to 100 mm (preferably, 20 mm to 50 mm). The roll outer peripheral surface 2a is selected according to the type of the coating liquid, the amount of coating, and the like, with a smooth surface having no irregularities, a gravure having a recessed portion, or a wire wound. As shown in FIG. 2, the coating roll 2 has both ends fixed to a base 10 via bearing members 9, 9, and one end connected to a rotation driving device (not shown) via a shaft coupling 11. As the rotation driving device, a variable driving device capable of changing the rotation speed of the coating roll 2 or a rotation driving device having a fixed rotation speed is selected. As shown in FIG. 1, the coating roll 2 is provided on one surface Wa of the base material W traveling in the direction (arrow B direction) opposite to the roll rotation direction (arrow A direction), and on the roll surface 2 a by the die 5. The formed coating liquid layer F is transferred by a reverse method to form a coating layer M.
[0021]
As shown in FIG. 3, the die 5 is provided outside a suitable portion of a region (see FIG. 3B) from the front lower half to the front upper half in the substrate non-contact region D of the roll outer peripheral surface 2 a. , A discharge port 5a and a measuring surface 5b. The die 5 extends in the left-right direction along the rotation center line 2b of the coating roll 2, and a manifold 5d and a coating liquid guide passage (slot nozzle) 5e extending in the left-right direction are formed inside the main body 5c. The discharge port 5a, which is the terminal of the coating liquid guide passage 5e extending from the manifold 5f, opens to the side of the rigid tip end lip 5f extending in the left-right direction, and the tip lip 5f has the outer periphery of the coating roll 2. A measuring surface 5b facing the surface 2a is formed.
A measuring gap G (see FIG. 5) is formed between the roll outer peripheral surface 2a and the measuring surface 5b. The measuring gap G is formed in a wedge shape on the side surface, and the thickness dimension (the distance between the roll outer peripheral surface 2a and the measuring surface 5b) can be reduced as the coating roll 2 moves in the rotation direction.
[0022]
The die 5 is supported by left and right support bases 12 and 12 (see FIG. 2) via left and right position adjusting mechanisms (not shown), and the thickness of the measuring gap G is adjusted by adjusting the position adjusting mechanisms. The dimension (the distance between the roll outer peripheral surface 2a and the measuring surface 5b) can be set to an optimum value according to the coating conditions. Further, as shown in FIG. 4, the position adjusting mechanism can swing the die body 5c around the measuring surface 5b, and changes the shape of the measuring gap G by adjusting the angle of the measuring surface 5b. I can do it.
[0023]
As shown in FIG. 3, the die 5 is connected to a coating liquid supply device (not shown) by a pipe, and after the coating liquid E supplied from the coating liquid supply device is diffused in the left-right direction by the manifold 5d, the slot nozzle is used. 5e, the liquid is uniformly discharged from the discharge port 5a over the entire area in the left-right direction, supplied to the outer peripheral surface 2a of the rotating coating roll 2, and the measuring gap G ( (See FIG. 5) The coating liquid E that has penetrated into the roll is measured on the measuring surface 5b to form a coating liquid layer F on the outer peripheral surface 2a of the roll. The measuring surface 5b changes the thickness dimension and shape of the measuring gap G to apply an appropriate shearing force to the coating liquid E that has entered the measuring gap G to form a smooth coating liquid layer F. be able to. The coating liquid E is pressurized as it penetrates into the measuring gap G in which the gap dimension is fixed to the set value, and a distribution load is applied to the roll outer peripheral surface 2a by the liquid pressure, and the pressing force P1 (see FIG. 5) ). The pressing force P1 is a reaction force of the fixed measuring surface 5b, and is a force applied to the roll outer peripheral surface 2a via the coating liquid E.
[0024]
The support 6 includes a first support 7 and a second support 8 as shown in FIG.
The first support 7 contacts the lower half of the roll outer peripheral surface 2a in the base material non-contact region D of the coating roll 2, and rotatably supports the coating roll 2. The first support 7 supports the distributed load due to the own weight of the coating roll 2 and prevents the coating roll 2 from bending due to its own weight. The first support 7 has a roll receiving groove 7a having a V-shaped or U-shaped cross section (not shown) extending in the left-right direction, and the coating roll 2 is supported by the support surfaces 7b, 7b of the roll receiving groove 7a. It is supported in line contact or surface contact. The first support member 7 includes a concave groove 7c formed in the bottom of the roll receiving groove 7a in the left-right direction, a liquid passage 7d communicating with the concave groove 7c, and a seal covering both left and right sides of the roll receiving groove 7a and the concave groove 7c. And a member 7e, 7e (see FIG. 2). The same or a different liquid as the coating liquid E supplied from a coating liquid supply device (not shown) is supplied through the liquid passage 7d to the concave groove 7c and the roll receiving groove 7a. It leads to. The introduced liquid infiltrates between the outer peripheral surface 2a of the roll and the support surfaces 7b, 7b of the first support 7 and exerts a lubricating role.
[0025]
As shown in FIG. 5, the second support member 8 generates a reaction force that can oppose the pressing force P1 generated by the liquid pressure of the coating liquid E that has penetrated into the measuring gap G. 2a and is pressed by a pressing force P2. The pressing force P2 is set to be larger than the pressing force P1, so that the floating of the coating roll 2 can be prevented. The second support member 8 is formed by a cleaning blade in which the blade tip 8a contacts the roll outer peripheral surface 2a, and cleans the roll outer peripheral surface 2a after transferring the coating liquid layer F onto the substrate W. The location where the blade tip 8a comes into contact is the entrance location where the roll outer peripheral surface 2a starts to enter the support 6 composed of the first support 7 and the second support 8. The second support member 8 is configured such that the position where the blade tip 8a is in contact with the roll outer peripheral surface 2a is above the rotation center 2b of the coating roll 2, so that the coating roll 2 has a component force P2a directed downward below the pressing force P2. Is pressed downward, and the component 7 is supported by the support 7 to prevent the coating roll 2 from rising.
[0026]
As shown in FIG. 1, the coating device 1 of the present invention is attached to an elevating device 17 so as to be able to move up and down between a raised coating position and a lowered standby position. Further, the coating equipment 1 arranges the guide roll 18 on the downstream side in the running direction (the direction of the arrow B) of the base material W from the coating apparatus 1 of the present invention, and guides the guide roll 18 in contact with the running base material W ( It moves back and forth from a position (shown by a two-dot chain line) to a standby position (a position shown by a solid line) where it does not touch. At the time of non-coating such as when the base material W is first passed through the base material traveling path, the base material W is guided by the guide roll 18 at the guide position, and the coating layer M is coated by the coating apparatus 1 of the present invention. At the time of coating, the guide roll 18 is retracted to the standby position, and the guide roll 18 is not brought into contact with the coating layer M.
[0027]
As shown in FIG. 1, the another coating apparatus K includes a backup roll 13 that rotates and drives the substrate W and guides the same, and a die 15 that coats the other surface Wb of the substrate W. . A die similar to the die 5 is selected as the die 15. Another coating device K can replace the die 15 with a coating roll such as a gravure roll or a kiss roll.
[0028]
As shown in FIG. 5, the coating apparatus 1 of the present invention transfers the coating liquid E extruded from the discharge port 5a of the die 5 between the roll outer peripheral surface 2a of the driving roll 2 and the measuring surface 5b. The coating liquid layer F is formed on the outer peripheral surface 2a of the roll by infiltration into the measuring gap G formed at the measuring surface 5b. The coating device 1 of the present invention is formed on one outer surface Wa of a base material W coated on another surface Wb by another coating device K (see FIG. 1), on a roll outer peripheral surface 2a of a coating roll 2. The applied coating liquid layer F is applied by a reverse method to form a coating layer M.
[0029]
In the coating device 1 of the present invention, even with the coating roll 2 having a small bending rigidity, the distributed load due to the own weight of the coating roll 2 is supported by the first support 7 and penetrated into the measuring gap G. Since the reaction force (pressing force P1) from the measuring surface 5b generated by the increase in the liquid pressure of the coating liquid E is supported by the second support 8, the coating is performed by its own weight and the reaction force (pressing force P1) having different force directions. The deflection amount of the work roll 2 can be reduced to such an extent that the coating accuracy is not adversely affected.
[0030]
In the coating device 1 of the present invention, since the diameter H of the coating roll 2 is a small diameter selected in the range of 20 mm to 100 mm (preferably, 20 mm to 50 mm), the base material with respect to the roll outer peripheral surface 2 a of the coating roll 2 is used. The pressing force of W (the pressing force per unit area) can be increased, and the coating liquid layer F formed on the outer peripheral surface 2a of the roll can be reliably transferred to the base material W by the reverse method to achieve high coating accuracy. Obtainable.
[0031]
The influence of the rotating coating roll 2 on the tension of the traveling base material W depends on the arc dimension of the base material contact region C that is wound around the coating roll 2 and makes contact with the base material W in the base material contact region C. The thickness and viscosity of the coating liquid film formed between the surface and the coating roll 2 are particularly important. The viscosity of the coating liquid film during coating is stable at a constant value. Therefore, when the arc dimension of the substrate contact area C is short and the thickness of the coating liquid film is small, the traveling base material The effect of the tendency to increase the tension of W is reduced, and the running of the substrate W is also stabilized. Therefore, when observing the relationship between the diameter of the coating roll 2 and the arc dimension of the base material contact area C, the winding angle θ (see FIG. 1) of the base material W wound around and in contact with the coating roll 2 is constant. In the case of the value, the smaller the diameter of the coating roll 2 is, the smaller the arc dimension of the substrate contact area C is. Since the diameter H of the coating roll 2 is a small diameter selected from the range of 20 mm to 100 mm (preferably, 20 mm to 50 mm) in the base material contact area C in the coating apparatus 1 of the present invention, the base material contact area C is small. The circular dimension of the area C is also shorter than that of the conventional roll outer peripheral surface having a large diameter (for example, a diameter of 200 mm to 300 mm). Further, as described above, the pressing pressure (the pressing force per unit area) of the base material W against the roll outer peripheral surface 2a of the coating roll 2 can be increased. The thickness of the coating liquid film formed between the surface and the outer peripheral surface 2a of the coating roll can also be reduced. As a result, in the case of the coating apparatus 1 of the present invention as compared with the related art, the arc dimension of the substrate contact area C is short and the thickness of the coating liquid film is small, so that the width of the traveling substrate W in the left-right width direction is reduced. The influence of the tendency to increase the tension over the entire area is reduced, the running of the base material W is stabilized, the coating state can be stabilized, and high coating accuracy can be obtained.
[0032]
(Second embodiment)
FIG. 6 shows a second embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
[0033]
The point that the coating device 21 of the present invention according to the present embodiment is significantly different from the coating device 1 of the present invention (see FIGS. 1 to 5) according to the first embodiment is the same as that of the first support 7. That is, the coating liquid guide passage 5e communicating with the discharge port 5a is formed at the boundary between the integrated part 22 and the other part 23 of the die 5 by integrating the part and a part of the die 5. The configuration other than this difference is substantially the same as the coating apparatus 1 of the present invention. In the coating device 21 of the present invention, since the first support 7 and the die 5 can be configured by a common member, the entire device can be made compact and the handling becomes easy.
[0034]
(Third embodiment)
FIG. 7 shows a third embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
[0035]
The present coating apparatus 31 according to the present embodiment differs greatly from the coating apparatus 21 according to the second embodiment (see FIG. 6) in that the coating apparatus 31 differs from the outer peripheral surface 2 a of the coating roll 2. That is, the second support member 8 is formed by a fixed block on which the support surface 8b that makes contact or line contact is formed. The configuration other than this difference is substantially the same as the coating device 21 of the present invention.
[0036]
The first support 7 and the second support 8 are connected and integrated, and the one support surface 7b of the first support 7 and the support surface 8b of the second support 8 are V-shaped or U-shaped in cross section. A groove 34 is formed in the bottom of the roll receiving groove 33 in the left-right direction, a liquid passage 35 communicating with the groove 34, and a roll receiving groove 33. A sealing member (not shown) for covering both left and right sides of the concave groove 34, and the same liquid or a different liquid as the coating liquid E supplied from the coating liquid supply device (not shown) is supplied through the liquid passage 35 to the concave groove 34. And it is led to the roll receiving groove 33. The liquid to be introduced penetrates between the outer peripheral surface 2a of the roll and the support surfaces 7b, 8b, and plays a role of lubrication and correction of deflection of the outer peripheral surface 2a of the roll.
[0037]
(Fourth embodiment)
8A and 8B show a fourth embodiment of the coating apparatus of the present invention, in which FIG. 8A is a right side view in which a main part is sectioned, and FIG. 8B is a right side view in which the vicinity of a measuring surface is enlarged. .
[0038]
The coating apparatus 41 of the present invention according to the present embodiment differs greatly from the coating apparatus 1 of the present invention 1 (see FIGS. 1 to 5) according to the first embodiment in that the coating apparatus 41 of the first embodiment is provided on the second half side. That is, the support tool 47 and the second support tool 8 are integrated, and the coating liquid supply tool 42 is arranged between the first support tool 47 and the measuring tool 43. The configuration other than this difference is substantially the same as the coating apparatus 1 of the present invention.
[0039]
The first support member 47 supports the distributed load caused by the own weight of the coating roll 2 on the support surface 47b formed on the block 47e, and prevents the coating roll 2 from bending due to its own weight. The coating liquid supply tool 42 is guided by a block 42e that forms a liquid storage space 42a for the coating liquid E with the coating roll outer peripheral surface 2a, a liquid passage 42d for guiding the coating liquid E, and a liquid passage 42d. Groove 42c for dispersing the applied coating liquid in the entire width direction of the liquid storage space 42a (the left-right direction which is the longitudinal direction of the coating roll 2), and a seal member for covering both the left and right sides of the liquid storage space 42a and the concave groove 42c ( (Not shown). The coating liquid supply tool 42 is integrated with the block 42e and the block 47e of the first support tool 47, for example, by bonding.
[0040]
The measuring tool 43 includes a measuring surface 43b that forms a measuring gap G with the outer peripheral surface 2a of the roll, and measures the coating liquid supplied to the outer peripheral surface 2a of the roll by the coating liquid supply device 42 to perform coating. The working liquid layer F is formed. The weighing tool 43 extends in the left-right direction along the rotation center line of the coating roll 2, and has a weighing surface 43b formed on a tip lip portion 43f. A measuring gap G is formed between the roll outer peripheral surface 2a and the measuring surface 43b. The measuring gap G is formed in a wedge shape on the side surface, and the thickness dimension (the distance between the roll outer peripheral surface 2a and the measuring surface 43b) can be reduced as it goes in the rotation direction of the coating roll 2. The thickness dimension of the measuring gap G can be adjusted by the gap adjusting device 46.
[0041]
(Fifth embodiment)
FIG. 9 shows a fifth embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
[0042]
The difference between the coating apparatus 51 of the present embodiment according to the present invention and the coating apparatus 41 of the present invention according to the fourth embodiment (see FIG. 8) is that the first support 47 provided on the rear half side is provided. And the second support 8 are connected and integrated, and the V-shaped or U-shaped (not shown) cross-section roll receiver is supported by the support surface 47b of the first support 47 and the support surface 8b of the second support 8. A groove 34 formed in the bottom surface of the roll receiving groove 33 and formed in the left and right direction, a liquid passage 35 communicating with the groove 34, and a seal covering both the left and right sides of the roll receiving groove 33 and the groove 34. A member (not shown) is provided to guide the same liquid or a different liquid as the coating liquid E supplied from the coating liquid supply device (not shown) to the concave groove 34 and the roll receiving groove 33 via the liquid passage 35. It is. The liquid to be introduced penetrates between the outer peripheral surface 2a of the roll and the support surfaces 47b and 8b, and plays a role of lubrication and correcting the deflection of the outer peripheral surface 2a of the roll.
[0043]
(Sixth embodiment)
FIG. 10 shows a sixth embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
[0044]
The difference between the coating device 61 according to the present embodiment and the coating device 1 according to the first embodiment (see FIGS. 1 to 5) is that the second support member 8 The first support tool and the coating liquid supply tool disposed between the coating tool 43 and the coating tool 43 are configured by a coating liquid pickup roll 63 disposed below the coating roll 2 and supporting the coating roll outer peripheral surface 2a. It is. The configuration of the second support 8 and the coating roll 2 other than this difference is substantially the same as that of the coating device 1 of the present invention, and the configuration of the measuring tool 43 is the same as that of the coating device 41 of the present invention. (See FIG. 8).
[0045]
The pick-up roll 63 is set so that the amount of deflection caused by its own weight and the weight of the supporting coating roll 2 is within an allowable range that does not decrease the accuracy of supplying the coating liquid E to the coating roll outer peripheral surface 2a. The diameter of the outer peripheral surface 63a (for example, the diameter is 200 mm to 300 mm) is selected. The pickup roll 63 is forcibly driven at an appropriate rotation speed, and rotates in a direction (arrow N direction) opposite to the rotation direction (arrow A direction) of the coating roll outer peripheral surface 2a. The pickup roll 63 forms the coating liquid layer Q by adhering the coating liquid E to the roll outer peripheral surface 63 a as the rotating roll outer peripheral surface 63 a passes through the coating liquid tank 67. The rotating pickup roll 63 transfers the coating liquid layer Q to the outer peripheral surface 2a of the rotating coating roll 2 to form a coating liquid layer R on the outer peripheral surface 2a. The coating liquid layer R is measured at 43b on the measuring surface of the measuring tool 43 with the rotation of the coating roll 2, and becomes a coating liquid layer F. Although the application of the coating liquid is not shown, the coating liquid discharged from a slit of a die or the like may be applied to the outer peripheral surface 63a of the roll.
[0046]
(Seventh embodiment)
FIG. 11 shows a seventh embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
[0047]
The difference between the coating device 71 of the present embodiment according to the present invention and the coating device 61 of the present invention according to the sixth embodiment (see FIG. 10) is as follows. That is, the support surfaces 78b and 78b are formed. The configuration other than this difference is substantially the same as the coating device 61 of the present invention.
[0048]
The second support member 78 includes support surfaces 78b, 78b for supporting the outer peripheral surface 2a of the coating roll 2, concave grooves 78a formed between the support surfaces 78b, 78b and facing the roll outer peripheral surface 2a, and concave grooves. A liquid passage 78d communicating with the coating liquid 78a, and a seal member (not shown) for covering both left and right sides of the concave groove 78d are provided. The same liquid or a different liquid as the coating liquid E supplied from a coating liquid supply device (not shown) is provided. The liquid is led to the concave groove 78a through the liquid passage 78d.
The liquid to be introduced penetrates between the outer peripheral surface 2a of the roll and the support surfaces 78b, 78b, and plays a role of lubrication and correction of deflection of the outer peripheral surface 2a of the roll.
[0049]
【The invention's effect】
In the coating apparatus according to the first aspect of the present invention, a coating roller having a diameter selected from a range of 20 mm to 100 mm (preferably, 20 mm to 50 mm) and having a small bending rigidity can be used. The coating liquid layer obtained by measuring the coating liquid supplied by the coating liquid supply tool with a measuring tool can be reliably transferred to the surface of the base material by the reverse method. It becomes possible.
[0050]
In the coating apparatus according to the second aspect of the present invention, the coating liquid remaining on the outer peripheral surface of the roll after the transfer to the substrate can be removed by the cleaning blade before entering the support, so that smooth coating is ensured. it can.
[0051]
In the coating apparatus according to the third aspect of the present invention, since the discharge port and the measuring surface are integrated by one set of dies, it is easy to handle and the coating work efficiency can be improved.
[0052]
The coating device of the present invention according to claim 4 can be made compact by integrating the support and the die, and the handling becomes easy.
[0053]
In the coating apparatus according to the fifth aspect of the present invention, since the pickup roll can support the coating roll and supply the coating liquid to the outer peripheral surface of the coating roll, the structure can be made simple and easy to handle.
[0054]
In the coating apparatus according to the present invention, the base material is guided by the guide roll at the guide position at the time of non-coating, so that stable running of the base material can be secured.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of a coating apparatus of the present invention, and is a right side view in which a main part of a coating apparatus including a coating apparatus of the present invention and another coating apparatus is sectioned. .
FIG. 2 is a plan view of the coating equipment according to the first embodiment.
FIG. 3A is a right side view in which main parts of the coating apparatus of the present invention according to the first embodiment are enlarged and sectioned, and FIG. 3B is a side view illustrating a region.
FIG. 4 is a right side view of an enlarged and cross-sectional view of a main part after the die is swung in the first embodiment.
FIG. 5 is an enlarged right side view for explaining an external force acting on an outer peripheral surface of a coating roll in the first embodiment.
FIG. 6 shows a second embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
FIG. 7 shows a third embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
FIG. 8 shows a fourth embodiment of the coating apparatus of the present invention, in which (A) is a right side view in which a main part is sectioned, and (B) is a right side view in which the vicinity of a measuring surface is enlarged. .
FIG. 9 shows a fifth embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
FIG. 10 shows a sixth embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
FIG. 11 shows a seventh embodiment of the coating apparatus of the present invention, and is a right side view in which a main part is sectioned.
[Explanation of symbols]
2 ... Coating roll, 2a ... Roll outer peripheral surface, 3 ... Measurement tool, 4 (42) ... Coating liquid supply tool, 5 ... Die, 5a ... Discharge port, 5b ... Measurement surface, 6 ... Support tool, 63 ... Pickup Roll, C: substrate contact area, D: substrate non-contact area, W: substrate

Claims

Coating in which a base material contacting region where a base material traveling in a direction opposite to the rotation direction of the roll outer circumferential surface is wound around and contacted with a driven outer circumferential surface of a roll and a non-base material non-contact region where the base material does not contact are formed. A coating apparatus, comprising: a roll, and a measuring tool having a measuring surface disposed outside the non-substrate non-contact area and forming a measuring gap between the roll outer peripheral surface and the roll outer peripheral surface. Is selected in the range of 20 mm to 100 mm (preferably, 20 mm to 50 mm), and from the upstream side to the downstream side in the rotation direction of the outer peripheral surface of the roll, outside the substrate non-contact area of the outer peripheral surface of the roll. A support for supporting the roll outer peripheral surface so as not to move against the reaction force from the measuring surface and the weight of the coating roll, and a coating liquid supply device for supplying a coating liquid to the roll outer peripheral surface And the weighing tool are arranged in this order. Coating and wherein the.

2. The coating apparatus according to claim 1, wherein the supporter includes a cleaning blade that receives a reaction force from the measuring surface via a blade tip that contacts the outer peripheral surface of the roll, on an upstream side in a rotation direction of the outer peripheral surface of the roll. .

The said coating liquid supply tool is provided with the discharge port which discharges a coating liquid on the outer peripheral surface of the said roll, The front-end | tip of a set of dies was provided with the said discharge port and the measuring surface adjacent to this discharge port. 3. The coating device according to 1 or 2.

4. The coating according to claim 3, wherein a part of the support and a part of the die are integrated, and a coating liquid guide passage communicating with the discharge port is formed at a boundary between the integrated part and the other part of the die. Engineering equipment.

A portion of the support, which supports the roll outer peripheral surface so as not to move against the own weight of the coating roll, and the coating liquid supply device are disposed below the coating roll and the coating is performed. The coating apparatus according to claim 1, comprising a coating liquid pickup roll that supports an outer peripheral surface of the roll.

The guide roll according to any one of claims 1 to 5, wherein a guide roll is disposed on a downstream side of the coating roll in the substrate traveling direction so as to be able to advance and retreat from a guide position in contact with the traveling base material to a standby position not in contact with the traveling base material. Coating equipment.