JP2004284324A

JP2004284324A - Thin sheet clamping device

Info

Publication number: JP2004284324A
Application number: JP2003082225A
Authority: JP
Inventors: Takuji Tsugawa; 拓司津川
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2003-03-25
Filing date: 2003-03-25
Publication date: 2004-10-14

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin sheet clamping device enabling easy removal at the time of removal of a thin sheet such as a printing plate and not causing coming-off or shift of it at the time of mounting. <P>SOLUTION: In this thin sheet clamping device, a groove and a hole parallel to the center axis are formed in a cylindrical barrel. A clamping bar is inserted rotatably into the hole. One end of the folded thin sheet end is hooked on one wall of the groove. The other end is inserted into the other side wall of the groove and hooked on the protrusion of the clamping bar. The clamping bar is rotated to clamp the thin sheet. In this device, a stepped hole opened in the front of the protrusion is formed in the clamping bar. A metal fitting is fitted in the stepped hole and is energized so as to protrude from the opening and the protruding position is restricted. The fitting has a clearance to one wall restricting the protrusion at a position where the bar is rotated oppositely to the hooking direction. In the position where the bar is rotated in the hooking direction, the fitting is pressed against one wall by the spring, and further, a gap is formed between the fitting and the other wall. When the bar is rotated in an opposite direction from the position rotated in the hooking direction, the fitting is protruded along one wall. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、印刷機械の版胴の版等、円筒状の胴体の被覆材に使用される薄板の締付装置に関する。
【０００２】
【従来の技術】
図１１からから図１９に基づき、従来の薄板締付装置を、印刷機械における版胴と版を例に説明する。図１１は印刷ユニットにおける一般的な版胴とブランケット胴と版押えローラの位置関係説明図、図１２は図１１中Ａ−Ａ矢視による版胴の拡大構造説明図、図１３は版の全体図、図１４と図１５は図１２中Ｂ−Ｂ矢視による従来の薄板締付装置の要部拡大断面図であり、図１４は版締め前の状態、図１５は版締め状態を示す。図１６と図１７は図１２中Ｃ−Ｃ矢視による従来の薄板締付装置のレバー関係図であり、図１６は版締め前の状態、図１７は版締め状態を示す。図１８は図１２中Ｄ−Ｄ矢視による従来の薄板締付装置の拡大断面図であり、締付バーの長手方向の形状を示す。また、図１９は、図１４と同様断面で示す不具合発生時の尻側版端部位置の説明図である。
【０００３】
図１１に示すように印刷機械において、版胴６はウェブ５０を挟んで配置されるブランケット胴２３に接して配置され、版胴６には薄板状の版１が巻きつけられる。図１２に示すように、版胴６の胴中２１には薄板締付装置（以下、単に「締付装置」ともいう）３が設けられるが、後述するように胴中２１の表面１８には締付装置３によって版１が締付けられて版胴６と一体化される。
【０００４】
締付装置３は色々な形式があるが（例えば、特許文献１参照）、その一つに図１３に示すように、版１の両端をフック状に折り曲げておき、図１５に示すように、版胴６の内部に組込まれた締付装置３の締付バー４の突起５を版１の尻側版端部４１のフック部２に引っ掛けて締付ける形式のものがある。
【０００５】
そのような締付装置３の従来の例を説明すると、図１２、図１４に示すように、円筒状の胴体をなす版胴６内には版胴６の軸心Ｘと平行に穴７が開けられ、穴７の内部には締付バー４が挿入されている。また、版胴６の胴中２１には版胴６の軸心Ｘに平行して、版１を挿入する為の細い溝９が設けられていて、版胴６の表面１８への穴７の開口部となっている。
【０００６】
版１は、図１３に示すようにくわえ側版端部４０は鋭角αに、他方の尻側版端部４１は２箇所で直角βに近く折り曲げられている。鋭角αに曲げられている一方のくわえ側版端部４０は、版胴６の溝９の一方のくわえ側（版胴６の回転Ｚの進行方向に向いた側）の壁２０に嵌められ、２箇所曲げられている他方の尻側版端部４１は溝９の他方の尻側（後側）の壁１９に嵌り込む。
【０００７】
くわえ側版端部４０の曲げ角度αは、版１を溝９に挿入した時、版胴のくわえ側の壁２０の角度と一致するように曲げられている。尻側版端部４１は溝９へ挿入できて、締付バー４で締付け易いように、略直角に曲げられた上でさらに先端部が略直角にフック部２をなす形状に曲げられている。
【０００８】
締付バー４は、版胴６の穴７内に挿入され、版胴６両端のベアラ１４と呼ばれる部分で回転自在に支えられていて、胴中２１に位置する部分には、締付バー４の軸心Ｙに平行に設けられ、締付バー４の周方向に向けた引っ掛かり形状をなす突起５を設けている。
【０００９】
図１８に示すように、ベアラ１４を貫通した締付バー４の端部にはレバー１０が固定されている。レバー１０の一端１０ａには二股部３０があり、ピン１１が固定されている。ベアラ１４の側面にはピン１２が固設されていて、レバー１０に締付バー４の軸心Ｙ回りの図１６に示す矢印方向（図中、反時計回り）の力が作用するように、ピン１１、１２の間に引張ばね１３が取付けられている。
【００１０】
ベアラ１４の側面に固定された軸１７には回転自在にストッパ１５が嵌め込まれていて、図１６に示すようにレバー１０の他端（引張ばね１３のついている反対側の先端）１０ｂに当たり、レバー１０の回転を邪魔することができるようにしてある。
【００１１】
版胴６の周辺には図１１に示すように版押えローラ１６が設けられてあり、図示しない駆動装置で胴中２１の表面１８へ押し付けられ、あるいは離れるように移動できる。版胴６への版１の装着は、図１１に示す版押えローラ１６の近傍の版脱着範囲２９に、版胴６の溝９が位置する状態で行われる。
【００１２】
まず、図１６の状態で、締付バー４は引張ばね１３によりレバー１０がストッパ１５に引っ掛かった位置まで回転している。この状態では図１４に示すように、締付バー４の突起５は版１の尻側版端部４１に接触しない位置にある。
【００１３】
版１のくわえ側版端部４０が版胴６の細い溝９に挿し込まれ、くわえ側の壁２０にぴったりと当てられた後、版押えローラ１６で版１を押えつつ版胴６を図１４中Ｚ方向に一回転近く回転させて巻き付け、しかる後、版１の尻側版端部４１を溝９に挿入する。即ち図１４の実線の状態から破線の状態へ版１を差し込む。
【００１４】
その状態で、ストッパ１５を図１６の破線の状態に回転してレバー１０から外すと、レバー１０は引張ばね１３の力で図１６中矢印の方向に回転し、締付バー４も突起５が版１のフック部２を引っかけて回転し、図１５、図１７に示すように、版１の張力と引張ばね１３の力が釣合った位置で止まる。すなわち、版１は引張ばね１３による力で版胴表面１８に巻き付けられ締付け固定される。
【００１５】
版１を版胴６から外す場合は、図示しない工具又は自動着脱装置により引張ばね１３に抗して締付バー４を逆回転させ図１４、図１６の位置に戻す。締付バー４の突起５は版１のフック部２から外れ、この時、版押えローラ１６は版胴表面１８から離れているので版１の尻側版端部４１は、図１４の実線の状態のように、弾性復元力で溝９から外れる。
【００１６】
以上のような従来の薄板締付装置３においては、以下のような問題があった。その第一は、版１を外す時に発生する不具合であり、図１９に破線で示すように尻側版端部４１のフック部２が溝９のくわえ側の壁２０に接触して、版１の弾性復元力では溝９から外れないことがあることである。これは、版１を張る為に突起５に引っ掛けられる版１の尻側版端部４１が、版材及び版曲げのばらつきなどで理想的な状態から外れ、変形することによる。
【００１７】
また、長時間の印刷運転で版に巻きぐせが付いている場合、図１９の実線の状態のように尻側版端部４１のフック部２が尻側の壁１９に接触し、版１が自分の弾性復元力では溝９から外れないことがある。
【００１８】
いずれの場合も、版１を溝９から取り出す為に、途中まで飛び出した版１と胴表面１８との間にドライバーなどを挿し込んで強引に引き出すなどの操作が必要となる。そうなると版１を外す為に多くの時間を要するので、次の印刷の始まりが遅れるなど、工程上多くの支障が生じる。
【００１９】
さらに、版１が大きく変形した場合、外した後再度使用することができなくなるので、追加印刷をする場合など、新たに版を製作しなければならないことともなり、余分の時間と費用が必要になる。
【００２０】
最近は非印刷部分を小さくする為に、図１９に示す溝９の幅ｄを版１のフック部２の大きさぎりぎりまで狭くしているので、この不具合の発生する頻度は高くなっている。また最近は、自動版替が一般的であるので、この不具合が発生すると自動版替え工程を阻害し、自動化のメリットがなくなる。その対策として版を引き出す吸着装置をつけるなど、大掛かりな装置を追加設置している場合も多く、一層複雑な構造となって、自動化装置が高価な一因になっている。
【００２１】
第二の問題は、版１を装着する時に発生する不具合であり、版１のくわえ側版端部４０を挿入後、図１４に示すように版押えローラ１６で押えて版胴６を回転し、版１を巻きつける時、押えローラ１６が押える前にくわえ側版端部４０がくわえ側の壁２０から離れ、版１と版胴６の位置関係がずれて、印刷時の見当ずれや版切れを引き起こしたりし、印刷工程を乱し、余分の費用を発生させることがあった。
【００２２】
【特許文献１】
特開平５−６９５３１号公報（第２、３頁、図１，図９）
【００２３】
【発明が解決しようとする課題】
本発明は、かかる従来の薄板締付装置の問題を解消し、大部分を従来の薄板締付装置の構造、構成のまま、簡単な追加構造で、版等薄板を外す時は薄板が外れやすく、薄板を装着する時に薄板の外れや、ずれがない薄板締付装置を提供することを課題とするものである。
【００２４】
【問題を解決するための手段】
（１）本発明は、上記の課題を解決するためになされたものであり、その第１の手段として、円筒状の胴体の軸心に平行に設けられた溝で同胴体表面に開口する穴を同胴体内に同軸心と平行に設け、同穴に回転自在に締付バーを挿入し、前記溝の一方の壁に薄板の折り曲げた一方の端部を引っ掛けるとともに、同薄板の折り曲げた他方の端部を前記溝の他方の壁側に挿入し、同他方の端部を前記締付バーに設けられた突起に引っ掛けて、同突起が前記一方の壁に近づく方向に同締付バーを回転し前記薄板を前記胴体に締付ける薄板締付装置において、前記締付バーに前記突起前方に開口する段付穴を同締付バーの略回転半径方向に穿ち、同段付穴内に同開口から突出するようにばねで付勢され突出位置を規制された金具を装着し、前記締付バーが突起の引っ掛け方向と反対に回転した位置において同金具は突出が規制され前記一方の壁との間に間隙を有し、同締付バーが同突起の引っ掛け方向に回転した位置では同金具は同一方の壁に前記ばねで押し付けられ且つ前記他方の壁との間に間隙を有し、同引っ掛け方向に回転した位置から反対方向に同締付バーが回転するとき、前記金具は前記一方の壁に沿って突出するように構成されてなることを特徴とする薄板締付装置を提供する。
【００２５】
上記の第１の手段によれば、基本的に大部分は従来の薄板締付装置の構造、構成のまま、締付バーの金具等の構成を追加する等の簡単な構成で、薄板を装着する時には、締付バーが突起の引っ掛け方向と反対に回転した位置において金具は一方の壁との間に間隙を有するので薄板の一方の端部を溝に容易に挿入でき、締付バーが突起の引っ掛け方向に回転した位置では金具は一方の壁に押し付けられているので金具が薄板の一方の端部を一方の壁に押え付け一方の端部が溝から外れたりずれたりせず、且つ金具が他方の壁との間に間隙を有しているので薄板の他方の端部を溝に挿入し易く、薄板の装着が容易となるので、関連工程を乱すことも防止される。また、薄板を外す時には、締付バーが突起の引っ掛け方向に回転した位置から反対方向に回転するとき、金具は一方の壁に沿って突出するので、薄板の他方の端部を押出し、薄板が溝から外れない問題が解消し、工程上の支障や、薄板の損傷の問題がなくなる。
【００２６】
（２）第２の手段としては、第１の手段の薄板締付装置において、前記締付バーは、前記突起の引っ掛け方向に回転するように付勢されて前記胴体に取り付けられるとともに、同締付バーの回転位置を、前記薄板の一方の端部を前記溝の一方の壁と前記金具の間の間隙に挿入する位置と、同薄板の他方の端部を同溝の他方の壁と同金具の間の間隙に挿入する位置と、前記他方の端部に前記突起を引っ掛けて同薄板を締付ける位置とに、規定する手段を有してなることを特徴とする薄板締付装置を提供する。
【００２７】
第２の手段によれば、第１の手段の作用に加え、締付バーの位置によって締付け操作を容易に制御できる。
【００２８】
（３）第３の手段としては、第２の手段の薄板締付装置において、前記締付バーの回転位置を規定する手段が、前記締付バーの端部に固定されたレバーと係合するカム機構であることを特徴とする薄板締付装置を提供する。
【００２９】
第３の手段によれば、第２の手段の作用を、簡明な機構で容易に行なえるものとなる。
【００３０】
（４）第４の手段としては、第１の手段ないし第３の手段のいずれかの薄板締付装置において、前記胴体が版胴であり、前記薄板が版であることを特徴とする薄板締付装置を提供する。
【００３１】
第４の手段によれば、第１の手段ないし第３の手段のいずれかの作用を、印刷機械の版胴への版の締付け、取り外し時に奏することができ、版を外す時に版が溝から外れない問題が解消し、版を装着する時に版の外れや、ずれがなくなるので、印刷時の見当ずれや版切れを引き起こしたりし、印刷工程を乱すことが防止される。
【００３２】
【発明の実施の形態】
図１から図９に基づき、本発明の実施の一形態に係る薄板締付装置を説明する。なお、図１１から図１３も参照する。図１から図５は、前述の図１４，１５と同様に図１２中Ｂ−Ｂ矢視による本実施の形態の薄板締付装置の要部拡大断面図であり、図１はくわえ側版端部の挿入状態、図２はくわえ側版端部を押えた状態、図３は尻側版端部の挿入状態、図４は版締め時の状態、図５は尻側版端部押出し状態を示す。図６から図８は、前述の図１６，１７と同様に図１２中Ｃ−Ｃ矢視による本実施の形態の薄板締付装置のカムとレバーの関係図であり、図９は、前述の図１８と同様に図１２中Ｄ−Ｄ矢視による本実施の形態の薄板締付装置の拡大断面図である。なお、図１０は、本発明の薄板締付装置の他の適用例の説明図である。なお、本実施の形態の説明において、前述した従来のものと同じ部分については図中同一の符号を付し、重複する説明は省略する。
【００３３】
また、本実施の形態において記載される構成部品の寸法、材質、形状、その相対位置などは特に特定的な記載が無い限り、この発明の範囲をそれのみに限定する趣旨ではなく単なる説明例に過ぎない。
【００３４】
本実施の形態の薄板締付装置（以下、単に「締付装置」ともいう）１０３は、締付バー１０４に、版１を押し出す為の金具８と、そのための装置構成を備えて、従来の不具合を解消したものである。
【００３５】
図１に示すように、本実施の形態においては、従来例で説明したと同様に、円筒状の胴体をなす版胴６に穴７が設けられ、穴７は版胴６の軸心Ｘに平行に設けられた溝９で版胴６の表面１８に開口し、穴７内には本実施の形態の締付バー１０４が挿入され、ベアラ１４に回動自在に支えられている。締付バー１０４には、胴中２１に位置する部分において、突起５前方で開口するように、１個又は複数個の段付穴３１が締付バー１０４の略回転半径方向に穿たれ、段付穴３１内には進退可能な金具８が嵌め込まれている。
【００３６】
段付穴３１の突起５前方の開口側は小径部４３、反対側は大径部４２に形成され、小径部４３と大径部４２との間に段部３２が形成されている。また、大径部４２の端部には抜け止めのプラグ２８が取り付けられる。そして、小径部４３には金具８の先端部８ａを、大径部４２には金具８の基部８ｂを摺動可能に挿通させ、金具８の基部８ｂとプラグ２８との間には押出しばね２７を装填して、金具８を小径部４３開口側へ押し出す方向に付勢し、段部３２が金具８のストッパとして突出を規制している。金具８の先端部８ａは版１挿入の邪魔にならず、また、尻側版端部４１を押し出すのに適した特殊な形状となっている。
【００３７】
すなわち、先端部８ａは、くわえ側の壁２０にくわえ側版端部４０を押し付けるための凸面部８１と、その反対側において尻側の壁１９に面し、穴７に挿入される尻側版端部４１とのぶつかりを避けるように形成した凹面部８２と、凸面部８１と凹面部８２との先端間に形成される押出し部８３を備えている。
【００３８】
締付バー１０４の端には、図６から図９に示されるように前述の従来例と同様にレバー１１０が固定されており、その一端部１１０ａのピン１１とベアラ１４の側面に固設されたピン１２との間に引張ばね１３が掛かっている。このレバー１１０を回転させ、又、回転位置を規定する為に，レバー１１０と係合するカム機構が設けられている。
【００３９】
カム機構は、カム２２がベアラ１４の側面に固定された軸２５に回転自在に嵌め込まれていて、レバー１１０の他端（引張ばね１３のついている反対側の先端）１１０ｂの二股部３５に固定された軸３４で支えられたカムフォロア２４に接触している。
【００４０】
カム２２は図６に示すように、軸２５の中心からの半径距離によって最高高さ部３７と中間高さ部３８及び最低高さ３９部を持った形状を有しており、また、回転させる為の四角頭部２６を備え、図示しない適宜な工具や自動回転装置で回転させ、図示しない適宜な手段でその回転位置を固定できるように構成されている。
【００４１】
レバー１１０には引張ばね１３が作用している為、突起５によりフック部２を引っ掛ける方向に締付バー１０４を回転するように付勢しているが、カムフォロア２４が常にカム２２に接触しているので、締付バー１０４の回転位置がカム機構によって規定されている。すなわち、カム２２の回転によってカムフォロア２４が接するカム２２の位置が最高高さ部３７、中間高さ部３８、または最低高さ３９部に変わるため、レバー１１０が締付バー１０４の軸心Ｙ回りに回転してレバー１１０と締付バー１０４が規定された角度に位置できるようになっている。
【００４２】
以上のように構成された本実施の形態の薄板締付装置１０３においては、以下のように版１の版胴６への装着、取り外しが行なわれる。
【００４３】
まず、版１のくわえ側版端部４０を胴中２１の溝９に挿入する場合、締付バー１０４を図１の状態に位置させる。この状態は、図６に示すようにカム２２の最高高さ部３７をカムフォロア２４の位置に回転させることで得られる。カム２２の回転は四角頭部２６を図示しない工具又は自動回転装置で回転させる。この状態では金具８の先端部８ａは段付穴３１の段部３２で突出を拘束され、溝９のくわえ側の壁２０と金具８との間に間隔を残して接近した状態にあり，くわえ側版端部４０をくわえ側の壁２０に沿って挿入するのに何ら障害とならない。
【００４４】
くわえ側版端部４０を溝９内に挿入した後、締付バー１０４を図１において反時計方向に回転して、図２の状態にする。この回転位置は図７に示すように、カム２２の中間高さ部３８をカムフォロア２４の位置に回転させることで得られる。この状態では、金具８の先端部８ａの凸面部８１はくわえ側の壁２０にばね２７により押接されて、くわえ側版端部４０を押えている。従ってその後、従来例の装置と同様に版押えローラ１６で版１を押えつつ、版胴６を図２中の矢印Ｚのように時計回りに回転させ、版１を巻きつけるが、くわえ側版端部４０がくわえ側壁２０から離れ、版１の装着ずれを起こす不具合は生じない。
【００４５】
溝９の位置が版脱着範囲２９に来るまで版胴６を回転した後、図３の破線の位置から実線の位置へ尻側版端部４１のフック部２を溝９内に押し込む。
【００４６】
金具８は図２の状態を維持して、金具８の先端部８ａは尻側の壁１９との間に間隙を残しているが、溝９の開口部直下に空間を形成し尻側版端部４１の挿入に支障なきようその凹面部８２の形状が決定されている。
【００４７】
次に、図８に示すように、カム２２をその最低高さ部３９がカムフォロア２４の位置になるように回転させると、締付バー１０４は図４に示すようにさらに反時計回りに回転し、突起５が尻側版端部４１のフック部２を引っ掛け、版１を張って胴の表面１８に巻きつけて締付け固定する。この版締状態では、カムフォロア２４とカム２２の最低高さ部３９の間に隙間があり、引張ばね１３の力が全て版１にかかっている。一方、締付バー１０４の回転により、金具８はくわえ側の壁２０上のくわえ側版端部４０に接触したまま、押出しばね２７に抗して段付穴３１内に押し込まれる。
【００４８】
したがって、上記カム機構によって、締付バー１０４の回転位置は、版１のくわえ側版端部４０をくわえ側の壁２０と金具８との間の間隙に挿入する位置と、版１の尻側版端部４１を尻側の壁１９と金具８との間の間隙に挿入する位置と、尻側版端部４１のフック部２に突起５を引っ掛けて版１を締付ける位置とに、規定することができ、締付バー１０４の位置制御が簡明な機構で容易に行なえ、自動化も容易に可能となる。
【００４９】
以上と逆に、版１を外す場合は、カム２２を最高高さ部３７がカムフォロア２４の位置になるように回転させ、図６に示す状態に戻すと、締付バー１０４は引張ばね１３に抗して締付け方向と反対方向に、その軸心Ｙ回りに図３の中間状態を経て図１の状態まで回転する。
【００５０】
その間、図３の状態で締付バー１０４の突起５は版１のフック部２から外れ、従来例の装置と同様に、版１はその弾性復元力によって溝９から脱出するが、尻側版端部４１のフック部２が壁１９、２０に接触して溝９の内部に残っても、図５に示すように、くわえ側の壁２０に沿って上昇しつつ突出する金具８の押出し部８３がフック部２に突き当たり、フック部２は押し出される。
【００５１】
したがって本実施の形態の薄板締付装置１０３によれば、基本的に大部分は従来の薄板締付装置３の構造、構成のまま、締付バー１０４の金具８、カム２２等の構成を追加するだけで、前述した従来装置の不具合を解消し、版１を装着する時には、締付バー１０４が突起５の引っ掛け方向と反対に回転した位置において金具８はくわえ側の壁２０との間に間隙を有するため版１のくわえ側端部４０を容易に挿入でき、締付バー１０４が突起の引っ掛け方向に回転した位置では金具８はくわえ側の壁２０に押し付けられているため金具８が版１のくわえ側端部４０をくわえ側の壁２０に押え付け、くわえ側端部４０が溝９から外れたりずれたりせず、且つ金具８が尻側の壁１９との間に間隙を有しているため版１の尻側端部４１を挿入し易く、版１の装着が容易となる。従って、版１を装着する時に版１の外れや、ずれがなくなるので、印刷時の見当ずれや版切れを引き起こしたりし、印刷工程を乱し、余分の費用を発生させることも防止される。
【００５２】
また、版１を外す時には、締付バー１０４が突起５の引っ掛け方向に回転した位置から反対方向に回転するとき、金具８はくわえ側の壁２０に沿って突出するので版１の尻側端部４１を押出し、尻側版端部４１のフック部２が版１の弾性復元力では溝９から外れない問題が解消し、途中まで飛び出した版１と胴表面１８との間にドライバーなどを挿し込んで強引に引き出すなどの操作が不要となり、工程上の支障や版の損傷による版の再製作等がなくなり、時間と費用のロスが防止され、自動版替が安定化し容易となるので自動化装置のコストを低減できる。
【００５３】
以上は印刷装置の版１の締付装置１０３を例にとって本発明の実施の一形態を説明したが、本発明は版の締付装置に限定されるものではなく、薄い板材に被覆材を貼付けたり、吹き付けるなどした被覆板の薄板締付装置としても実施でき、同様の作用効果を奏することができる。例えば、図１０に示すような薄板６０を基材としたブランケット６１や、裏写り防止の被覆材を表面に接着した板等の薄板締付装置として採用できる。
【００５４】
以上、本発明を図示の実施の形態について説明したが、本発明は上記の実施の形態に限定されず、本発明の範囲内でその具体的構造に種々の変更を加えてよいことはいうまでもない。
【００５５】
【発明の効果】
（１）請求項１の発明によれば、薄板締付装置を、円筒状の胴体の軸心に平行に設けられた溝で同胴体表面に開口する穴を同胴体内に同軸心と平行に設け、同穴に回転自在に締付バーを挿入し、前記溝の一方の壁に薄板の折り曲げた一方の端部を引っ掛けるとともに、同薄板の折り曲げた他方の端部を前記溝の他方の壁側に挿入し、同他方の端部を前記締付バーに設けられた突起に引っ掛けて、同突起が前記一方の壁に近づく方向に同締付バーを回転し前記薄板を前記胴体に締付ける薄板締付装置において、前記締付バーに前記突起前方に開口する段付穴を同締付バーの略回転半径方向に穿ち、同段付穴内に同開口から突出するようにばねで付勢され突出位置を規制された金具を装着し、前記締付バーが突起の引っ掛け方向と反対に回転した位置において同金具は突出が規制され前記一方の壁との間に間隙を有し、同締付バーが同突起の引っ掛け方向に回転した位置では同金具は同一方の壁に前記ばねで押し付けられ且つ前記他方の壁との間に間隙を有し、同引っ掛け方向に回転した位置から反対方向に同締付バーが回転するとき、前記金具は前記一方の壁に沿って突出するように構成されてなるようにしたので、基本的に大部分は従来の薄板締付装置の構造、構成のまま、締付バーの金具等を追加する等の簡単な構成で、薄板を装着する時には、締付バーが突起の引っ掛け方向と反対に回転した位置において金具は一方の壁との間に間隙を有するので薄板の一方の端部を溝に容易に挿入でき、締付バーが突起の引っ掛け方向に回転した位置では金具は一方の壁に押し付けられているので金具が薄板の一方の端部を一方の壁に押え付け一方の端部が溝から外れたりずれたりせず、且つ金具が他方の壁との間に間隙を有しているので薄板の他方の端部を溝に挿入し易く、薄板の装着が容易となるので、関連工程を乱すことも防止され、余分の費用を発生させることも防止される。また、薄板を外す時には、締付バーが突起の引っ掛け方向に回転した位置から反対方向に回転するとき、金具は一方の壁に沿って突出するので、薄板の他方の端部を押出し、薄板が溝から外れない問題が解消し、工程上の支障や、薄板の損傷の問題がなくなり、時間と費用のロスが防止され、自動化作業が安定化し容易となるので自動化装置のコストを低減できる。
【００５６】
（２）請求項２の発明によれば、請求項１に記載の薄板締付装置において、前記締付バーは、前記突起の引っ掛け方向に回転するように付勢されて前記胴体に取り付けられるとともに、同締付バーの回転位置を、前記薄板の一方の端部を前記溝の一方の壁と前記金具の間の間隙に挿入する位置と、同薄板の他方の端部を同溝の他方の壁と同金具の間の間隙に挿入する位置と、前記他方の端部に前記突起を引っ掛けて同薄板を締付ける位置とに、規定する手段を有してなるように構成したので、請求項１の発明の効果に加え、締付バーの位置によって締付け操作を容易に制御できるので、自動化も容易に可能となる。
【００５７】
（３）請求項３の発明によれば、請求項２に記載の薄板締付装置において、前記締付バーの回転位置を規定する手段が、前記締付バーの端部に固定されたレバーと係合するカム機構であるように構成したので、請求項２の発明の効果を、簡明な機構で容易に奏しうるものとなる。
【００５８】
（４）請求項４の発明によれば、請求項１ないし請求項３のいずれかに記載の薄板締付装置において、前記胴体が版胴であり、前記薄板が版であるように構成したので、請求項１ないし請求項３のいずれかの発明の効果を、印刷機械の版胴への版の締付け、取り外し時に奏することができ、版を外す時に版が溝から外れない問題が解消し、工程上の支障や、版の損傷による版の再製作等がなくなり、時間と費用のロスが防止され、自動版替が安定化し容易となるので自動化装置のコストを低減できる。そして、版を装着する時に版の外れや、ずれがなくなるので、印刷時の見当ずれや版切れを引き起こしたりし、印刷工程を乱し、余分の費用を発生させることも防止される。
【図面の簡単な説明】
【図１】本発明の実施の一形態に係る薄板締付装置の説明図であり、図１２中Ｂ−Ｂ矢視による本実施の形態の薄板締付装置の要部拡大断面図であって、くわえ側版端部の挿入状態を示す。
【図２】図１と同様の、本実施の形態の薄板締付装置の要部拡大断面図であって、くわえ側版端部を押えた状態を示す。
【図３】図１と同様の、本実施の形態の薄板締付装置の要部拡大断面図であって、尻側版端部の挿入状態を示す。
【図４】図１と同様の、本実施の形態の薄板締付装置の要部拡大断面図であって、版締め時の状態を示す。
【図５】図１と同様の、本実施の形態の薄板締付装置の要部拡大断面図であって、尻側版端部押出し状態を示す。
【図６】図１２中Ｃ−Ｃ矢視による本実施の形態の薄板締付装置のカムとレバーの関係図である。
【図７】図６と同様の、本実施の形態の薄板締付装置のカムとレバーの関係図である。
【図８】図６と同様の、本実施の形態の薄板締付装置のカムとレバーの関係図である。
【図９】図１２中Ｄ−Ｄ矢視による本実施の形態の薄板締付装置の拡大断面図である。
【図１０】本発明の薄板締付装置の他の適用例の説明図である。
【図１１】印刷ユニットにおける一般的な版胴とブランケット胴と版押えローラの位置関係説明図である。
【図１２】図１１中Ａ−Ａ矢視による版胴の拡大構造説明図である。
【図１３】版の全体図である。
【図１４】図１２中Ｂ−Ｂ矢視による従来の薄板締付装置の要部拡大断面図であり、版締め前の状態を示す。
【図１５】図１４と同様の、従来の薄板締付装置の要部拡大断面図であり、版締め状態を示す。
【図１６】図１２中Ｃ−Ｃ矢視による薄板締付装置のレバー関係図であり、版締め前の状態を示す。
【図１７】図１６と同様の、薄板締付装置のレバー関係図であり、版締め状態の状態を示す。
【図１８】図１２中Ｄ−Ｄ矢視による薄板締付装置の拡大断面図であり、締付バーの長手方向の形状を示す。
【図１９】図１４と同様断面で示す、不具合発生時の尻側版端部位置の説明図である。
【符号の説明】
１版
２フック部
３締付装置
４締付バー
５突起部
６版胴
７穴
８金具
８ａ先端部
８ｂ基部
９溝
１０レバー
１３引張ばね
１４ベアラ
１５ストッパ
１６版押えローラ
１８表面
１９尻側の壁
２０くわえ側の壁
２１胴中
２２カム
２３ブランケット胴
２４カムフォロア
２６四角頭部
２７押出しばね
２８プラグ
２９版脱着範囲
３１段付穴
３２段部
３７最高高さ部
３８中間高さ部
３９最低高さ部
４０くわえ側版端部
４１尻側版端部
４２大径部
４３小径部
５０ウェブ
６０薄板
６１ブランケット
８１凸面部
８２凹面部
８３押出し部
１０３締付装置
１０４締付バー
１１０レバー[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin plate fastening device used for covering a cylindrical body such as a plate of a plate cylinder of a printing machine.
[0002]
[Prior art]
Referring to FIGS. 11 to 19, a conventional thin plate fastening device will be described by taking a plate cylinder and a plate in a printing machine as an example. 11 is an explanatory diagram of the positional relationship between a general plate cylinder, a blanket cylinder, and a plate pressing roller in a printing unit, FIG. 12 is an enlarged diagram of the plate cylinder viewed from the direction of arrows AA in FIG. 11, and FIG. FIGS. 14 and 15 are enlarged cross-sectional views of a main part of the conventional thin plate tightening apparatus taken along line BB in FIG. 12, wherein FIG. 14 shows a state before plate clamping and FIG. 15 shows a plate clamping state. FIGS. 16 and 17 are lever-related diagrams of the conventional thin plate tightening device as viewed in the direction of arrows CC in FIG. 12, wherein FIG. 16 shows a state before plate clamping and FIG. 17 shows a plate clamping state. FIG. 18 is an enlarged cross-sectional view of the conventional thin plate tightening device taken along the line DD in FIG. 12, and shows the shape of the tightening bar in the longitudinal direction. FIG. 19 is an explanatory diagram of the end of the tail side plate when a failure occurs, which is shown in a cross section similar to FIG.
[0003]
As shown in FIG. 11, in the printing machine, the plate cylinder 6 is arranged in contact with a blanket cylinder 23 arranged with a web 50 interposed therebetween, and the plate cylinder 6 is wound with the thin plate-shaped plate 1. As shown in FIG. 12, a thin plate fastening device (hereinafter, also simply referred to as a “fastening device”) 3 is provided in the inside 21 of the plate cylinder 6. The plate 1 is tightened by the tightening device 3 and integrated with the plate cylinder 6.
[0004]
There are various types of the tightening device 3 (for example, see Patent Document 1). One of them is that both ends of the plate 1 are bent in a hook shape as shown in FIG. 13, and as shown in FIG. There is a type in which the projection 5 of the tightening bar 4 of the tightening device 3 incorporated in the plate cylinder 6 is hooked on the hook 2 of the tail-side plate end 41 of the plate 1 and tightened.
[0005]
A conventional example of such a tightening device 3 will be described. As shown in FIGS. 12 and 14, a hole 7 is formed in a plate cylinder 6 forming a cylindrical body in parallel with the axis X of the plate cylinder 6. It is opened and the tightening bar 4 is inserted into the hole 7. In the cylinder 21 of the plate cylinder 6, a thin groove 9 for inserting the plate 1 is provided in parallel with the axis X of the plate cylinder 6, and a hole 7 in the surface 18 of the plate cylinder 6 is formed. It is an opening.
[0006]
As shown in FIG. 13, the plate 1 is bent at an acute angle α at the grip side plate end 40 and bent at a right angle β at two places at the other tail side plate end 41. One grip side plate end 40 bent at the acute angle α is fitted to the wall 20 on one grip side (the side facing the direction of rotation Z of the plate cylinder 6) of the groove 9 of the plate cylinder 6, The other butt side plate end 41 bent at two places fits into the other butt side (rear side) wall 19 of the groove 9.
[0007]
The bending angle α of the gripping plate end 40 is bent so as to match the angle of the gripping side wall 20 of the plate cylinder when the plate 1 is inserted into the groove 9. The butt-side plate end 41 can be inserted into the groove 9 and is bent at a substantially right angle so as to be easily tightened with the tightening bar 4, and further the end is bent at a substantially right angle to form the hook portion 2. .
[0008]
The tightening bar 4 is inserted into the hole 7 of the plate cylinder 6 and is rotatably supported by portions called bearers 14 at both ends of the plate cylinder 6. The protrusion 5 is provided in parallel with the axis Y and has a hooking shape toward the circumferential direction of the tightening bar 4.
[0009]
As shown in FIG. 18, a lever 10 is fixed to an end of the tightening bar 4 penetrating the bearer 14. A forked portion 30 is provided at one end 10a of the lever 10, and the pin 11 is fixed. A pin 12 is fixedly mounted on the side surface of the bearer 14, and a force is applied to the lever 10 in the direction of the arrow (counterclockwise in the figure) around the axis Y of the tightening bar 4 in FIG. A tension spring 13 is mounted between the pins 11 and 12.
[0010]
A stopper 15 is rotatably fitted on a shaft 17 fixed to the side surface of the bearer 14, and hits the other end 10b of the lever 10 (the opposite end with the tension spring 13) as shown in FIG. 10 can be prevented from rotating.
[0011]
As shown in FIG. 11, a plate holding roller 16 is provided around the plate cylinder 6, and can be pressed against the surface 18 of the cylinder 21 by a drive device (not shown) or moved away from the cylinder. The mounting of the plate 1 on the plate cylinder 6 is performed in a state where the groove 9 of the plate cylinder 6 is located in the plate attaching / detaching area 29 near the plate pressing roller 16 shown in FIG.
[0012]
First, in the state of FIG. 16, the tightening bar 4 has been rotated by the tension spring 13 to a position where the lever 10 is hooked on the stopper 15. In this state, as shown in FIG. 14, the projection 5 of the tightening bar 4 is at a position where it does not come into contact with the trailing edge 41 of the plate 1.
[0013]
After the plate-side plate end 40 of the plate 1 is inserted into the narrow groove 9 of the plate cylinder 6 and is exactly abutted against the wall 20 on the side of the plate, the plate cylinder 6 is pressed while the plate-holding roller 16 holds the plate 1. 14, is wound by being rotated about one rotation in the Z direction, and then the tail-side plate end 41 of the plate 1 is inserted into the groove 9. That is, the plate 1 is inserted from the state of the solid line to the state of the broken line in FIG.
[0014]
In this state, when the stopper 15 is rotated to the state shown by the broken line in FIG. 16 and detached from the lever 10, the lever 10 rotates in the direction of the arrow in FIG. The hook 2 of the plate 1 is hooked and rotated, and stops at a position where the tension of the plate 1 and the force of the tension spring 13 are balanced as shown in FIGS. That is, the plate 1 is wound around the plate cylinder surface 18 by the force of the tension spring 13 and is tightened and fixed.
[0015]
When the plate 1 is to be removed from the plate cylinder 6, the tightening bar 4 is reversely rotated against the tension spring 13 by a tool (not shown) or an automatic attaching / detaching device to return the plate to the position shown in FIGS. The projections 5 of the tightening bar 4 are disengaged from the hooks 2 of the plate 1. At this time, since the plate press roller 16 is separated from the plate cylinder surface 18, the rear side plate end 41 of the plate 1 has a solid line shown in FIG. As in the state, it comes off the groove 9 by the elastic restoring force.
[0016]
The conventional thin plate fastening device 3 as described above has the following problems. The first is a defect that occurs when the plate 1 is removed. As shown by a broken line in FIG. 19, the hook portion 2 of the buttocks side plate end 41 comes into contact with the wall 20 on the grip side of the groove 9 and the plate 1 is removed. The elastic restoring force may not come off the groove 9. This is due to the fact that the tail-side plate end 41 of the plate 1 hooked on the projection 5 to stretch the plate 1 deviates from an ideal state due to variations in plate material and plate bending, and is deformed.
[0017]
Further, when the printing plate is curled in a long printing operation, the hook portion 2 of the buttocks side plate end 41 comes into contact with the buttocks side wall 19 as shown by the solid line in FIG. The elastic restoring force may not come off the groove 9.
[0018]
In any case, in order to take the plate 1 out of the groove 9, an operation such as inserting a screwdriver or the like between the plate 1 that has protruded halfway and the body surface 18 and forcibly pulling it out is necessary. In that case, it takes a lot of time to remove the printing plate 1, so that many troubles occur in the process, such as a delay in the start of the next printing.
[0019]
Furthermore, if the plate 1 is greatly deformed, it cannot be used again after it has been removed, so that a new plate must be manufactured, such as when additional printing is performed, and extra time and cost are required. Become.
[0020]
Recently, the width d of the groove 9 shown in FIG. 19 has been reduced to just below the size of the hook portion 2 of the plate 1 in order to reduce the size of the non-printed portion. In recent years, since automatic plate changing is common, if this trouble occurs, the automatic plate changing process is hindered, and the advantage of automation is lost. As a countermeasure, a large-scale device is often additionally installed, for example, by attaching a suction device for extracting the plate, and the structure becomes more complicated, and the automation device is one of the causes of high cost.
[0021]
The second problem is a problem that occurs when the plate 1 is mounted. After the plate side edge 40 of the plate 1 is inserted, the plate cylinder 6 is rotated by being pressed by the plate pressing roller 16 as shown in FIG. When the plate 1 is wound, before the pressing roller 16 presses down, the grip side plate end 40 separates from the grip side wall 20, and the positional relationship between the plate 1 and the plate cylinder 6 shifts, thereby causing misregistration during printing and printing. In some cases, this may cause cutting and disruption of the printing process, resulting in extra costs.
[0022]
[Patent Document 1]
JP-A-5-69531 (pages 2, 3; FIGS. 1, 9)
[0023]
[Problems to be solved by the invention]
The present invention solves such a problem of the conventional thin plate tightening device, and most of the structure and configuration of the conventional thin plate tightening device are simply added with a simple additional structure. It is another object of the present invention to provide a thin plate tightening device that does not come off or slip when the thin plate is mounted.
[0024]
[Means to solve the problem]
(1) The present invention has been made in order to solve the above-mentioned problems, and as a first means, a hole opened on the surface of a cylindrical body by a groove provided in parallel with the axis of the body. Is provided in the same body in parallel with the coaxial center, a tightening bar is rotatably inserted into the hole, and one end of the bent thin plate is hooked on one wall of the groove, and the other bent end of the thin plate is hooked. Is inserted into the other wall side of the groove, and the other end is hooked on a projection provided on the fastening bar, and the fastening bar is moved in a direction in which the projection approaches the one wall. In the thin plate tightening device that rotates and tightens the thin plate to the body, a stepped hole that opens to the front of the projection on the tightening bar is formed in a substantially rotational radial direction of the tightening bar, and the hole is inserted into the stepped hole from the opening. Attach a fitting whose spring is urged by a spring so that the projecting position is regulated. At the position where is rotated in the direction opposite to the hooking direction of the projection, the fitting is restricted from projecting and has a gap between the one wall, and at the position where the fastening bar is rotated in the hooking direction of the projection, the fitting is When the tightening bar rotates in the opposite direction from the position rotated in the hooking direction, the bracket is pressed against the one wall by the spring and has a gap between the one wall and the other wall. Provided is a thin plate fastening device, which is configured to protrude along a wall.
[0025]
According to the above-mentioned first means, basically, the thin plate is mounted with a simple structure such as adding a structure such as a fitting of a tightening bar while keeping the structure and structure of the conventional thin plate tightening device in a major part. When the fastening bar is rotated in the direction opposite to the hooking direction of the projection, the metal fitting has a gap between itself and one wall, so that one end of the thin plate can be easily inserted into the groove, and the fastening bar is protruded. In the position rotated in the hooking direction, the metal fitting is pressed against one wall, so that the metal fitting presses one end of the thin plate against the one wall so that one end does not come off or slip from the groove, and Has a gap between it and the other wall, so that the other end of the thin plate can be easily inserted into the groove, and the thin plate can be easily mounted, so that the related steps are not disturbed. Also, when removing the thin plate, when the tightening bar rotates in the opposite direction from the position in which the projection is hooked, the bracket projects along one wall, so the other end of the thin plate is pushed out, and the thin plate is pushed out. The problem of not falling out of the groove is eliminated, and the problems in the process and the problem of damage to the thin plate are eliminated.
[0026]
(2) As a second means, in the thin plate tightening device of the first means, the tightening bar is attached to the body by being urged so as to rotate in a direction in which the protrusion is hooked, and is also attached to the body. The rotation position of the attached bar is such that one end of the thin plate is inserted into the gap between one wall of the groove and the metal fitting, and the other end of the thin plate is the same as the other wall of the groove. A thin plate tightening device characterized by comprising means for defining a position to be inserted into a gap between metal fittings and a position to hook the projection to the other end to tighten the thin plate. .
[0027]
According to the second means, in addition to the action of the first means, the tightening operation can be easily controlled by the position of the tightening bar.
[0028]
(3) As a third means, in the thin plate tightening device of the second means, the means for defining the rotational position of the tightening bar is engaged with a lever fixed to an end of the tightening bar. A thin plate fastening device characterized by a cam mechanism is provided.
[0029]
According to the third means, the operation of the second means can be easily performed by a simple mechanism.
[0030]
(4) As a fourth means, in the thin plate fastening device according to any one of the first to third means, the body is a plate cylinder, and the thin plate is a plate. An attachment device is provided.
[0031]
According to the fourth means, the operation of any one of the first means to the third means can be performed when the plate is tightened or removed from the plate cylinder of the printing machine, and when the plate is removed, the plate is removed from the groove. Since the problem that the printing plate does not come off is eliminated, and the printing plate is not separated or shifted when the printing plate is mounted, it is possible to prevent misregistration or printing out during printing, and to prevent the printing process from being disturbed.
[0032]
BEST MODE FOR CARRYING OUT THE INVENTION
A thin plate fastening device according to an embodiment of the present invention will be described with reference to FIGS. Note that FIGS. 11 to 13 are also referred to. 1 to 5 are enlarged cross-sectional views of the main part of the thin plate tightening device of the present embodiment as viewed from arrows BB in FIG. 12, similarly to FIGS. 14 and 15 described above. FIG. 2 shows a state in which the edge of the side plate is pressed, FIG. 3 shows a state in which the edge of the tail side plate is inserted, FIG. 4 shows a state in which the plate is fastened, and FIG. 5 shows a state in which the edge of the tail side plate is pushed out. Show. FIGS. 6 to 8 are views showing the relationship between the cam and the lever of the thin plate tightening device according to the present embodiment as viewed from arrows CC in FIG. 12, similarly to FIGS. 16 and 17 described above. FIG. 19 is an enlarged cross-sectional view of the thin plate fastening device of the present embodiment, as viewed in the direction of arrows DD in FIG. 12, similarly to FIG. 18. FIG. 10 is an explanatory view of another application example of the thin plate fastening device of the present invention. In the description of the present embodiment, the same parts as those of the above-described conventional one are denoted by the same reference numerals in the drawings, and redundant description will be omitted.
[0033]
In addition, the dimensions, materials, shapes, relative positions, and the like of the components described in the present embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples, unless otherwise specified. Not just.
[0034]
A thin plate tightening device (hereinafter, also simply referred to as a “tightening device”) 103 according to the present embodiment is provided with a metal fitting 8 for extruding a plate 1 on a tightening bar 104 and a device configuration therefor. This is a solution to the problem.
[0035]
As shown in FIG. 1, in the present embodiment, as described in the conventional example, a hole 7 is provided in a plate cylinder 6 that forms a cylindrical body, and the hole 7 is provided at an axis X of the plate cylinder 6. The opening 9 is opened in the surface 18 of the plate cylinder 6 by the groove 9 provided in parallel, and the tightening bar 104 of the present embodiment is inserted into the hole 7 and supported by the bearer 14 so as to be rotatable. One or more stepped holes 31 are formed in the fastening bar 104 in a portion located in the middle of the body 21 so as to be opened in front of the protrusion 5 in a substantially rotating radial direction of the fastening bar 104. A metal fitting 8 that can move forward and backward is fitted in the hole 31.
[0036]
The opening of the stepped hole 31 in front of the projection 5 is formed in the small diameter portion 43 and the opposite side is formed in the large diameter portion 42, and the step 32 is formed between the small diameter portion 43 and the large diameter portion 42. Further, a plug 28 for retaining is attached to an end of the large diameter portion 42. The distal end portion 8a of the metal fitting 8 is slidably inserted through the small diameter portion 43, and the base 8b of the metal fitting 8 is slidably inserted through the large diameter portion 42. The pushing spring 27 is inserted between the base 8b of the metal fitting 8 and the plug 28. Is loaded, and the metal fitting 8 is urged in a direction to push the metal fitting 8 toward the opening side of the small-diameter portion 43, and the step 32 regulates the protrusion as a stopper of the metal fitting 8. The tip 8a of the metal fitting 8 does not hinder the insertion of the plate 1 and has a special shape suitable for pushing out the tail-side plate end 41.
[0037]
That is, the front end portion 8a has a convex portion 81 for pressing the gripping side plate end portion 40 against the gripping side wall 20, and the opposite side faces the rear side wall 19 and the rear side plate inserted into the hole 7. It has a concave portion 82 formed so as to avoid collision with the end portion 41 and an extruded portion 83 formed between the tips of the convex portion 81 and the concave portion 82.
[0038]
As shown in FIGS. 6 to 9, a lever 110 is fixed to the end of the tightening bar 104 in the same manner as in the conventional example described above, and is fixed to the pin 11 at one end 110a and the side surface of the bearer 14. A tension spring 13 is hooked between the pin 12 and the pin 12. A cam mechanism that engages with the lever 110 is provided to rotate the lever 110 and to define the rotational position.
[0039]
The cam mechanism is such that the cam 22 is rotatably fitted on a shaft 25 fixed to the side surface of the bearer 14, and is fixed to the forked portion 35 of the other end 110 b of the lever 110 (the opposite end where the tension spring 13 is attached) 110 b. And is in contact with the cam follower 24 supported by the shaft 34.
[0040]
As shown in FIG. 6, the cam 22 has a shape having a maximum height portion 37, an intermediate height portion 38, and a minimum height 39 portion depending on the radial distance from the center of the shaft 25, and is rotated. The head is provided with a square head 26 for rotation by an appropriate tool (not shown) or an automatic rotating device, and the rotation position can be fixed by appropriate means (not shown).
[0041]
Since the tension spring 13 is acting on the lever 110, the projection 5 biases the tightening bar 104 to rotate in the direction in which the hook portion 2 is hooked, but the cam follower 24 always contacts the cam 22. Therefore, the rotational position of the tightening bar 104 is defined by the cam mechanism. That is, the rotation of the cam 22 changes the position of the cam 22 with which the cam follower 24 comes into contact with the highest height portion 37, the middle height portion 38, or the lowest height 39 portion, so that the lever 110 rotates around the axis Y of the tightening bar 104. And the lever 110 and the tightening bar 104 can be positioned at a specified angle.
[0042]
In the thin plate fastening device 103 of the present embodiment configured as described above, the plate 1 is attached to and detached from the plate cylinder 6 as follows.
[0043]
First, when the grip side plate end 40 of the plate 1 is to be inserted into the groove 9 of the cylinder 21, the tightening bar 104 is positioned as shown in FIG. This state is obtained by rotating the highest height portion 37 of the cam 22 to the position of the cam follower 24 as shown in FIG. The rotation of the cam 22 rotates the square head 26 with a tool (not shown) or an automatic rotating device. In this state, the distal end 8a of the metal fitting 8 is restrained from projecting by the step 32 of the stepped hole 31, and is close to the metal fitting 8 with a gap between the wall 20 on the grip side of the groove 9 and the grip. There is no hindrance in inserting the side plate end 40 along the side wall 20.
[0044]
After inserting the gripping plate end 40 into the groove 9, the tightening bar 104 is rotated counterclockwise in FIG. 1 to the state shown in FIG. This rotation position is obtained by rotating the intermediate height portion 38 of the cam 22 to the position of the cam follower 24 as shown in FIG. In this state, the convex portion 81 of the distal end portion 8a of the metal fitting 8 is pressed against the gripping-side wall 20 by the spring 27 to hold the gripping-side plate end portion 40. Therefore, after that, while holding the plate 1 with the plate holding roller 16 in the same manner as in the conventional apparatus, the plate cylinder 6 is rotated clockwise as indicated by the arrow Z in FIG. The end portion 40 is separated from the side wall 20 and no problem occurs that the printing plate 1 is displaced.
[0045]
After rotating the plate cylinder 6 until the position of the groove 9 comes to the plate attaching / detaching range 29, the hook portion 2 of the tail-side plate end 41 is pushed into the groove 9 from the position indicated by the broken line in FIG.
[0046]
While the metal fitting 8 maintains the state of FIG. 2, the tip 8 a of the metal fitting 8 leaves a gap between it and the bottom wall 19, but a space is formed immediately below the opening of the groove 9, and The shape of the concave portion 82 is determined so as not to hinder the insertion of the portion 41.
[0047]
Next, as shown in FIG. 8, when the cam 22 is rotated so that the minimum height portion 39 is at the position of the cam follower 24, the tightening bar 104 further rotates counterclockwise as shown in FIG. Then, the projection 5 hooks the hook 2 of the tail side plate end 41, stretches the plate 1 and winds it around the surface 18 of the body to tighten and fix it. In this plate clamping state, there is a gap between the cam follower 24 and the minimum height portion 39 of the cam 22, and the tension spring 13 exerts all the force on the plate 1. On the other hand, by the rotation of the tightening bar 104, the metal fitting 8 is pushed into the stepped hole 31 against the push-out spring 27 while being in contact with the grip-side plate end 40 on the grip-side wall 20.
[0048]
Therefore, the rotational position of the tightening bar 104 is determined by the cam mechanism in such a manner that the gripping side plate end 40 of the plate 1 is inserted into the gap between the gripping side wall 20 and the metal fitting 8, and the butt side of the plate 1. The position where the plate end 41 is inserted into the gap between the bottom wall 19 and the metal fitting 8 and the position where the projection 5 is hooked on the hook 2 of the tail side plate end 41 and the plate 1 is fastened are defined. The position of the tightening bar 104 can be easily controlled by a simple mechanism, and automation can be easily performed.
[0049]
Conversely, when removing the plate 1, the cam 22 is rotated so that the highest height portion 37 is at the position of the cam follower 24, and when the state shown in FIG. In opposition to the tightening direction, the shaft rotates around its axis Y through the intermediate state shown in FIG. 3 to the state shown in FIG.
[0050]
In the meantime, in the state shown in FIG. 3, the projection 5 of the tightening bar 104 comes off the hook portion 2 of the plate 1, and the plate 1 escapes from the groove 9 by its elastic restoring force, as in the conventional device. As shown in FIG. 5, even when the hook portion 2 of the end portion 41 is in contact with the walls 19 and 20 and remains inside the groove 9, the pushing portion of the metal fitting 8 protruding while rising along the wall 20 on the grip side. 83 abuts on the hook 2 and the hook 2 is pushed out.
[0051]
Therefore, according to the thin plate tightening device 103 of the present embodiment, basically, most of the structure and structure of the conventional thin plate tightening device 3 are added to the structure of the fitting 8 of the tightening bar 104, the cam 22, and the like. When the plate 1 is mounted, the bracket 8 is positioned between the clamp 8 and the wall 20 at the position where the tightening bar 104 is rotated in the direction opposite to the hooking direction of the protrusion 5 when the plate 1 is mounted. Since there is a gap, the grip side end 40 of the plate 1 can be easily inserted, and at the position where the tightening bar 104 is rotated in the hooking direction of the projection, the metal fitting 8 is pressed against the wall 20 on the grip side. The gripper end 40 is pressed against the gripper side wall 20 so that the gripper end 40 does not come off or slip from the groove 9, and the metal fitting 8 has a gap between the gripper side wall 19 and the gripper side wall 19. Because it is easy to insert the tail end 41 of the plate 1, 1 of the attachment is facilitated. Accordingly, when the printing plate 1 is mounted, the printing plate 1 does not come off or shift, so that it is possible to prevent misregistration or printing out during printing, disturb the printing process, and generate extra cost.
[0052]
When the plate 1 is removed, when the tightening bar 104 rotates in the opposite direction from the position in which the protrusion 5 is hooked, the metal fitting 8 projects along the wall 20 on the grip side. The problem that the hook 2 of the buttocks side plate end 41 does not come off from the groove 9 due to the elastic restoring force of the plate 1 is solved, and a driver or the like is inserted between the plate 1 that has protruded halfway and the body surface 18. Operation such as inserting and forcibly pulling out is not required, and there is no need to reproduce the plate due to trouble in the process or damage to the plate, preventing loss of time and cost, and stabilizing automatic plate change, facilitating automation. The cost of the device can be reduced.
[0053]
Although the embodiment of the present invention has been described above by taking the fastening device 103 of the printing plate 1 as an example, the present invention is not limited to the fastening device of the plate, and the covering material is attached to a thin plate material. The present invention can also be implemented as a thin plate fastening device for a coated plate that has been sprayed or sprayed, and the same operation and effect can be obtained. For example, it can be adopted as a thin plate fastening device such as a blanket 61 using a thin plate 60 as a base material as shown in FIG. 10 or a plate having a coating material for preventing show-through on its surface.
[0054]
As described above, the present invention has been described with reference to the illustrated embodiments. However, the present invention is not limited to the above embodiments, and it is needless to say that various changes may be made to the specific structure within the scope of the present invention. Nor.
[0055]
【The invention's effect】
(1) According to the first aspect of the present invention, the thin plate fastening device is provided with a hole which is opened in the surface of the cylindrical body by a groove provided in parallel with the axis of the cylindrical body, and is parallel to the coaxial center in the body. A clamping bar is rotatably inserted into the hole, and one bent end of the thin plate is hooked on one wall of the groove, and the other bent end of the thin plate is connected to the other wall of the groove. Side, and the other end is hooked on a projection provided on the fastening bar, the projection rotates the fastening bar in a direction approaching the one wall, and the thin plate is fastened to the body. In the tightening device, a stepped hole that opens in front of the protrusion in the tightening bar is formed in a substantially radial direction of rotation of the tightening bar, and is urged by a spring so as to protrude from the opening into the stepped hole. With the metal fittings whose position was regulated, the tightening bar was rotated in the opposite direction to the hooking direction of the projection. In the position, the metal fitting is restricted from projecting and has a gap between the one wall and the metal fitting is pressed against the same wall by the spring when the tightening bar is rotated in the hooking direction of the metal projection. And there is a gap between the other wall, and when the tightening bar rotates in the opposite direction from the position rotated in the hooking direction, the metal fitting is configured to protrude along the one wall. Basically, most of the structure and configuration of the conventional thin plate tightening device are basically the same as those of the conventional thin plate tightening device. At the position where the bar is rotated in the direction opposite to the hooking direction of the projection, the metal fitting has a gap with one wall, so that one end of the thin plate can be easily inserted into the groove, and the tightening bar rotates in the hooking direction of the projection. The bracket is pressed against one wall Because the metal fitting presses one end of the thin plate against one wall, one end does not come off or slip from the groove, and the metal fitting has a gap between the other wall and the other end of the thin plate It is easy to insert the end portion of the groove into the groove, and the mounting of the thin plate is facilitated, so that the related process is prevented from being disturbed, and the extra cost is prevented. Also, when removing the thin plate, when the tightening bar rotates in the opposite direction from the position in which the projection is hooked, the bracket projects along one wall, so the other end of the thin plate is pushed out, and the thin plate is pushed out. The problem of not falling out of the groove is eliminated, the problems in the process and the problem of damage to the thin plate are eliminated, the loss of time and cost is prevented, and the automation work is stabilized and facilitated, so that the cost of the automation device can be reduced.
[0056]
(2) According to the second aspect of the present invention, in the thin plate tightening device according to the first aspect, the tightening bar is urged so as to rotate in the hooking direction of the protrusion and is attached to the body. The rotational position of the tightening bar, the position where one end of the thin plate is inserted into the gap between one wall of the groove and the metal fitting, and the other end of the thin plate is the other end of the groove. Claim 1 is configured to have means for defining a position to be inserted into the gap between the wall and the metal fitting and a position to hook the projection on the other end and tighten the thin plate. In addition to the effects of the invention, the tightening operation can be easily controlled by the position of the tightening bar, so that automation can be easily performed.
[0057]
(3) According to the third aspect of the present invention, in the thin plate tightening apparatus according to the second aspect, the means for defining the rotational position of the tightening bar includes a lever fixed to an end of the tightening bar. Since the cam mechanism is configured to be engaged, the effect of the invention of claim 2 can be easily achieved with a simple mechanism.
[0058]
(4) According to the fourth aspect of the present invention, in the thin plate tightening device according to any one of the first to third aspects, the body is a plate cylinder and the thin plate is a plate. The effect of the invention according to any one of claims 1 to 3 can be achieved when the plate is fastened to or removed from the plate cylinder of a printing machine, and the problem that the plate does not come off from the groove when the plate is removed is solved. Disadvantages in the process, plate re-production due to plate damage, and the like are eliminated, loss of time and cost is prevented, and automatic plate change is stabilized and facilitated, so that the cost of the automation device can be reduced. Further, since the printing plate is not detached or shifted when the printing plate is mounted, it is possible to prevent the printing register from being misregistered or the printing plate from being cut out, disturbing the printing process, and generating extra costs.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a thin plate fastening device according to an embodiment of the present invention, and is an enlarged sectional view of a main part of the thin plate fastening device of the present embodiment taken along line BB in FIG. Shows the insertion state of the edge of the holding plate.
FIG. 2 is an enlarged sectional view of a main part of the thin plate fastening device according to the present embodiment, similar to FIG. 1, showing a state in which an edge of a gripping plate is pressed.
FIG. 3 is an enlarged cross-sectional view of a main part of the thin plate fastening device of the present embodiment, similar to FIG.
FIG. 4 is an enlarged cross-sectional view of a main part of the thin plate fastening device of the present embodiment, similar to FIG. 1, showing a state at the time of plate fastening.
FIG. 5 is an enlarged cross-sectional view of a main part of the thin plate fastening device according to the present embodiment, similar to FIG.
FIG. 6 is a view showing the relationship between the cam and the lever of the thin plate fastening device according to the present embodiment, as viewed in the direction of arrows CC in FIG.
FIG. 7 is a view similar to FIG. 6, showing the relationship between the cam and the lever of the thin plate fastening device of the present embodiment.
FIG. 8 is a view similar to FIG. 6, showing the relationship between the cam and the lever of the thin plate fastening device of the present embodiment.
FIG. 9 is an enlarged cross-sectional view of the thin plate fastening device according to the present embodiment, taken along line DD in FIG.
FIG. 10 is an explanatory view of another application example of the thin plate fastening device of the present invention.
FIG. 11 is a diagram illustrating a positional relationship among a general plate cylinder, a blanket cylinder, and a plate pressing roller in a printing unit.
FIG. 12 is an explanatory view of an enlarged structure of the plate cylinder taken along line AA in FIG.
FIG. 13 is an overall view of a plate.
FIG. 14 is an enlarged cross-sectional view of a main part of the conventional thin plate tightening apparatus, taken along line BB in FIG. 12, showing a state before plate clamping.
FIG. 15 is an enlarged sectional view of a main part of the conventional thin plate fastening device, similar to FIG. 14, showing a plate fastening state.
FIG. 16 is a lever relation diagram of the thin plate fastening device as viewed in the direction of arrows CC in FIG. 12, showing a state before plate clamping.
FIG. 17 is a lever-related diagram of the thin plate fastening device, similar to FIG. 16, showing a state in which the plate is fastened;
FIG. 18 is an enlarged cross-sectional view of the thin plate tightening device taken along the line DD in FIG. 12, showing a shape of the tightening bar in the longitudinal direction.
FIG. 19 is an explanatory view showing the position of the end of the tail side plate when a failure occurs, which is shown in a cross section similar to FIG. 14;
[Explanation of symbols]
1 edition
2 Hook section
3 Tightening device
4 Tightening bar
5 Projection
6 plate cylinder
7 holes
8 Metal fittings
8a Tip
8b Base
9 grooves
10 lever
13 Extension spring
14 Bearer
15 Stopper
16 Plate holding roller
18 Surface
19 Bottom wall
20 Side wall
21
22 cams
23 Blanket cylinder
24 Cam Follower
26 square head
27 Extrusion spring
28 plug
29 plate removal range
31 Stepped hole
32 steps
37 Maximum height
38 Intermediate height
39 Minimum height
40 Edge of plate side
41 butt side plate edge
42 Large diameter part
43 Small diameter part
50 Web
60 thin plate
61 blanket
81 Convex part
82 Concave surface
83 Extrusion unit
103 Tightening device
104 Tightening bar
110 lever

Claims

円筒状の胴体の軸心に平行に設けられた溝で同胴体表面に開口する穴を同胴体内に同軸心と平行に設け、同穴に回転自在に締付バーを挿入し、前記溝の一方の壁に薄板の折り曲げた一方の端部を引っ掛けるとともに、同薄板の折り曲げた他方の端部を前記溝の他方の壁側に挿入し、同他方の端部を前記締付バーに設けられた突起に引っ掛けて、同突起が前記一方の壁に近づく方向に同締付バーを回転し前記薄板を前記胴体に締付ける薄板締付装置において、前記締付バーに前記突起前方に開口する段付穴を同締付バーの略回転半径方向に穿ち、同段付穴内に同開口から突出するようにばねで付勢され突出位置を規制された金具を装着し、前記締付バーが突起の引っ掛け方向と反対に回転した位置において同金具は突出が規制され前記一方の壁との間に間隙を有し、同締付バーが同突起の引っ掛け方向に回転した位置では同金具は同一方の壁に前記ばねで押し付けられ且つ前記他方の壁との間に間隙を有し、同引っ掛け方向に回転した位置から反対方向に同締付バーが回転するとき、前記金具は前記一方の壁に沿って突出するように構成されてなることを特徴とする薄板締付装置。A hole opened in the surface of the cylindrical body with a groove provided in parallel with the axis of the cylindrical body is provided in the body in parallel with the coaxial center, and a tightening bar is rotatably inserted into the hole, and a hole is formed in the groove. While hooking one bent end of the thin plate on one wall, inserting the other bent end of the thin plate into the other wall side of the groove, the other end is provided on the tightening bar. A thin plate fastening device that rotates the fastening bar in a direction in which the projection approaches the one wall to fasten the thin plate to the body, wherein the projection is opened in front of the projection on the fastening bar. A hole is drilled in the direction of substantially the radius of rotation of the tightening bar, and a fitting whose spring is urged by a spring so as to protrude from the opening and whose protruding position is regulated is attached to the stepped hole. At the position rotated in the opposite direction, the protrusion of the metal fitting is regulated, and In the position where the tightening bar is rotated in the hooking direction of the projection, the metal fitting is pressed against the same wall by the spring and has a gap between the other wall, The thin plate tightening device, wherein the metal fitting is configured to protrude along the one wall when the tightening bar rotates in the opposite direction from the position rotated in the hooking direction.

請求項１に記載の薄板締付装置において、前記締付バーは、前記突起の引っ掛け方向に回転するように付勢されて前記胴体に取り付けられるとともに、同締付バーの回転位置を、前記薄板の一方の端部を前記溝の一方の壁と前記金具の間の間隙に挿入する位置と、同薄板の他方の端部を同溝の他方の壁と同金具の間の間隙に挿入する位置と、前記他方の端部に前記突起を引っ掛けて同薄板を締付ける位置とに、規定する手段を有してなることを特徴とする薄板締付装置。2. The thin plate tightening device according to claim 1, wherein the tightening bar is attached to the body by being urged to rotate in a hooking direction of the protrusion, and the rotational position of the tightening bar is set by the thin plate. 3. A position where one end of the thin plate is inserted into a gap between one wall of the groove and the metal fitting, and a position where the other end of the thin plate is inserted into a gap between the other wall of the groove and the metal fitting. And a means for defining the position at which the projection is hooked to the other end and the thin plate is tightened.

請求項２に記載の薄板締付装置において、前記締付バーの回転位置を規定する手段が、前記締付バーの端部に固定されたレバーと係合するカム機構であることを特徴とする薄板締付装置。3. The thin plate tightening device according to claim 2, wherein the means for defining the rotational position of the tightening bar is a cam mechanism that engages with a lever fixed to an end of the tightening bar. Thin plate fastening device.

請求項１ないし請求項３のいずれかに記載の薄板締付装置において、前記胴体が版胴であり、前記薄板が版であることを特徴とする薄板締付装置。4. The thin plate tightening apparatus according to claim 1, wherein the body is a plate cylinder, and the thin plate is a plate.