JP3744436B2

JP3744436B2 - Printing condition inspection apparatus and printing condition inspection method for multi-face large format paper

Info

Publication number: JP3744436B2
Application number: JP2002041461A
Authority: JP
Inventors: 貢田中
Original assignee: 独立行政法人国立印刷局
Priority date: 2002-02-19
Filing date: 2002-02-19
Publication date: 2006-02-08
Anticipated expiration: 2022-02-19
Also published as: JP2003237032A

Description

【０００１】
【発明の属する技術分野】
本発明は、用紙上に複数の同一画像が印刷された大判模様印刷物（印刷済枚葉紙）の印刷状態を検査する印刷状態検査装置及び印刷状態検査方法に関する。
【０００２】
【従来の技術】
従来、紙幣等の複写禁止原稿を画像認識又は読み取りする方法として、特願平７−１６５５３２号のような画像処理装置及び画像処理方法があるが、この方法は完全に乾燥した同一の紙幣画像が複数印刷された大判模様印刷物（以下、多面化大判紙という。）を単一の紙幣に断裁した小切れ券を対象とし、読み取り対象である原稿を手作業により正規位置に位置合わせした後、原稿の画像を認識し画像の良否を判定していた。また、接触式であるため、印刷直後の十分に乾燥していない用紙を検査する場合は、原稿を汚してしまうという問題があった。
【０００３】
また、認識対象原稿が小切れ券であるため、多面化大判紙の各小切れ券の画像の一括認識は不可能であり、多面化大判紙の良否の判別時間も長くなり、その結果、各多面化大判紙の印刷状態を管理する（印刷状態管理機能）ことが難しいという問題があった。
【０００４】
【発明が解決しようとする課題】
本発明は、前記問題点を解決するため、複数の多面化大判紙の中から指定された検査対象の未乾燥の多面化大判紙を取り出し、吸着しながら載置板上に載置し、この多面化大判紙の画像及び位置決めマークを非接触で読み取り、位置決めマークの座標位置から読み取った画像を正確且つ迅速に位置補正し、補正後の多面化大判紙の各面（各小切れ面）の画像を迅速に認識して各多面化大判紙の印刷状態の良否を迅速に判定し、且つ印刷状態を管理することである。また、印刷直後の十分に乾燥していない多面化大判紙の画像及び位置決めマークを、汚染することなく、非接触で読み取ることである。更に、この多面化大判紙の印刷状態検査結果から早期に印刷不良を検出し、それ以後の印刷ラインに印刷不良が発生するのを未然に防止することである。
【０００５】
【課題を解決するための手段】
本発明の多面化大判紙の印刷状態検査装置は、複数に分割された各特定画像領域内に夫々同一の特定画像が印刷された多面化大判紙の印刷直後の印刷状態を検査及び管理する多面化大判紙の印刷状態検査装置であって、位置決めマークの位置座標である標準位置決めマークデータ及び標準特定画像データを予め設定・保持する標準画像設定・保持手段と、印刷ラインから取り出された、特定画像領域外に１つ以上の用紙位置決めマークが印刷された検査対象の多面化大判紙をその裏面を吸着しつつ載置し、表裏反転させる用紙載置手段と、前記用紙載置手段に載置された多面化大判紙を、非接触でスキャンニングすることにより検査対象の多面化大判紙から前記用紙位置決めマークと前記特定画像領域内の特定画像を読み取る画像読み取り手段（スキャナー）と、前記読み取った検査対象の位置補正前の多面化大判紙の用紙位置決めマークの座標位置データである用紙位置決めマークデータと前記標準画像設定・保持手段に保持された標準位置決めマークデータとを比較し、検査対象の多面化大判紙の用紙位置決めマークの座標位置が標準画像の用紙位置決めマークの座標位置に一致するように補正前の検査対象の多面化大判紙の読み取り画像を位置補正する位置補正手段と、前記位置補正された検査対象の多面化大判紙の読み取り画像中の特定画像と前記標準画像設定・保持手段に保持された標準特定画像とを比較して多面化大判紙の印刷状態を段階別に判別する印刷状態判別手段と、前記印刷状態判別手段により判別された各多面化大判紙の印刷状態データを記憶、収集及び管理し、各多面化大判紙の印刷状態データを表示又は印刷する印刷状態データ処理手段とを備えている。
【０００６】
本発明の多面化大判紙の印刷状態検査装置は、複数に分割された各特定画像領域内に夫々同一の特定画像が印刷された多面化大判紙の印刷直後の印刷状態を検査及び管理する多面化大判紙の印刷状態検査装置であって、位置決めマークの位置座標である標準位置決めマークデータ及び標準特定画像データを予め設定・保持する標準画像設定・保持手段と、印刷ラインから取り出された、特定画像領域外に１つ以上の用紙位置決めマークが印刷された検査対象の多面化大判紙をその裏面を吸着しつつ載置し、表裏反転させ、且つ後述の位置補正手段から送出された位置補正データに基づいて所定量移動させて位置補正する用紙載置手段と、前記用紙載置手段に載置された多面化大判紙を、非接触でスキャンニングすることにより検査対象の位置補正前又は位置補正後の多面化大判紙から前記用紙位置決めマークと前記特定画像領域内の特定画像を読み取る画像読み取り手段（スキャナー）と、前記読み取った検査対象の位置補正前の多面化大判紙の用紙位置決めマークの座標位置データである用紙位置決めマークデータと前記標準画像設定・保持手段に保持された標準位置決めマークデータとを比較し、検査対象の多面化大判紙の用紙位置決めマークの座標位置が標準画像の用紙位置決めマークの座標位置に一致するように用紙載置手段の移動量を算出し用紙載置手段に該移動量データを送出する位置補正手段と、前記位置補正された検査対象の多面化大判紙の読み取り画像中の特定画像と前記標準画像設定・保持手段に保持された標準特定画像とを比較して多面化大判紙の印刷状態を段階別に判別する印刷状態判別手段と、前記印刷状態判別手段により判別された各多面化大判紙の印刷状態データを記憶、収集及び管理し、各多面化大判紙の印刷状態データを表示又は印刷する印刷状態データ処理手段とを備えている。
【０００７】
本発明は、前記用紙載置手段が、載置時のみ吸着動作を行う多面化大判紙の印刷状態検査装置である。
【０００８】
本発明は、前記用紙載置手段の吸着手段が真空吸引又は静電気により吸着する多面化大判紙の印刷状態検査装置である。
【０００９】
本発明は、前記画像読み取り手段の経年変化（劣化）に応じて前記読み取った特定画像データを補正する多面化大判紙の印刷状態検査装置である。
【００１０】
本発明の多面化大判紙の印刷状態検査方法は、複数に分割された各特定画像領域内に夫々同一の特定画像が印刷された多面化大判紙の印刷直後の印刷状態を検査及び管理する多面化大判紙の印刷状態検査方法であって、位置決めマークの位置座標である標準位置決めマークデータ及び標準特定画像データを予め設定・記憶し、印刷ラインから取り出された、特定画像領域外に１つ以上の用紙位置決めマークが印刷された検査対象の多面化大判紙をその裏面を吸着させつつ用紙載置板に載置し、表裏反転させ、前記用紙載置板に載置した多面化大判紙を、画像読み取り手段（スキャナー）を用いて非接触でスキャンニングし、検査対象の多面化大判紙から前記用紙位置決めマークと前記特定画像領域内の特定画像を読み取り、前記読み取った検査対象の位置補正前の多面化大判紙の用紙位置決めマークの座標位置データである用紙位置決めマークデータと前記標準画像を設定・記憶した標準位置決めマークデータとを比較し、検査対象の多面化大判紙の用紙位置決めマークの座標位置が標準画像の用紙位置決めマークの座標位置に一致するように補正前の検査対象の多面化大判紙の読み取り画像を位置補正し、前記位置補正された検査対象の多面化大判紙の読み取り画像中の特定画像と前記標準画像を設定・記憶した標準特定画像とを比較して多面化大判紙の印刷状態を段階別に判別し、前記判別された各多面化大判紙の印刷状態データを記憶、収集及び管理し、各多面化大判紙の印刷状態データを表示又は印刷するようにしている。
【００１１】
本発明の多面化大判紙の印刷状態検査方法は、複数に分割された各特定画像領域内に夫々同一の特定画像が印刷された多面化大判紙の印刷直後の印刷状態を検査及び管理する多面化大判紙の印刷状態検査方法であって、位置決めマークの位置座標である標準位置決めマークデータ及び標準特定画像データを予め設定・記憶し、印刷ラインから取り出された、特定画像領域外に１つ以上の用紙位置決めマークが印刷された検査対象の多面化大判紙をその裏面を吸着させつつ用紙載値板に載置し、表裏反転させ、且つ後述の位置補正手段から送出された位置補正データに基づいて所定量を移動させて位置補正し、前記用紙載置板に載置された多面化大判紙を、画像読み取り手段（スキャナー）を用いて非接触でスキャンニングし、検査対象の位置補正前又は位置補正後の多面化大判紙から前記用紙位置決めマークと前記特定画像領域内の特定画像を読み取り、前記読み取った検査対象の位置補正前の多面化大判紙の用紙位置決めマークの座標位置データである用紙位置決めマークデータと前記標準画像を設定・記憶した標準位置決めマークデータとを比較し、検査対象の多面化大判紙の用紙位置決めマークの座標位置が標準画像の用紙位置決めマークの座標位置に一致するように用紙載置板の移動量を算出し用紙載置板に該移動量データを送出して位置補正し、前記位置補正された検査対象の多面化大判紙の読み取り画像中の特定画像と前記標準画像の設定・記憶された標準特定画像とを比較して多面化大判紙の印刷状態を段階別に判別し、前記判別された各多面化大判紙の印刷状態データを記憶、収集及び管理し、各多面化大判紙の印刷状態データを表示又は印刷するするようにしている。
【００１２】
【発明の実施の形態】
本発明は、複数に分割された特定画像領域ａ、ｂ、ｃ、ｄに夫々同一の画像が印刷された多面化大判紙２の印刷直後の印刷状態を検査及び管理する多面化大判紙の印刷状態検査装置１に関するものであり、図３に示すように、多面化大判紙の特定画像領域外に１つ以上の用紙位置決めマーク２Ａが予め印刷される。
【００１３】
印刷状態検査装置１は、図１に示すように、用紙載置板３と画像読取り部（スキャナー）４と画像処理部５と標準データ保持部６と印刷状態判定処理部７と判定データ処理部８とから構成される。なお、前記標準データ保持部６には、検査対象の多面化大判紙２の画像の基準となる標準データである、用紙位置決めマークの位置座標データである標準位置決めマークデータ６ａと標準特定画像データ６ｂとが、予め保持される。
【００１４】
用紙載置板３は、図１及び図４に示すように、これを回転させる回転軸３Ａと、後述の画像処理部５の位置補正処理部５Ｃからの位置補正データに基づいてこの回転軸をＸＹ方向に移動又は回転移動させて用紙載置板３上に吸着されている検査対象の多面化大判紙２の位置補正制御及び前記多面化大判紙２を用紙載置板３に吸着する吸着動作の制御を行う用紙載置板駆動制御部３Ｂとを具備する。
例えば、位置補正量が水平左方向にＸｍｍ（ミリメートル）の場合は、水平右方向にＸｍｍ（ミリメートル）移動して、位置補正する。
また、位置補正量が垂直上方向にＹｍｍ（ミリメートル）の場合は、垂直下方向にＹｍｍ（ミリメートル）移動して、位置補正する。
また、位置ずれが、一定位置を中心にして、傾斜している場合は、その点を中心に傾斜量分だけ標準位置まで回転させて、位置補正する。
【００１５】
画像読取り部（スキャナー）４は、図６に示すように、用紙載置板３に載置されたサンプリングされた検査対象の多面化大判紙２の全面をスキャンニング（点線矢印により図示。）することにより、多面化大判紙２の用紙位置決めマーク２Ａ及び特定画像領域ａ、ｂ、ｃ、ｄ内の特定画像を読み取る。
【００１６】
画像処理部５は、画像読取り部（スキャナー）４で読み取った画像データ中から用紙位置決めマークデータを取り出して記憶する用紙位置決めマーク記憶部５Ａと、同様に画像読取り部（スキャナー）４で読み取った位置補正前又は位置補正後の画像データ中から特定画像データを取り出して記憶する読取り画像記憶部５Ｂと、前記読み取った用紙位置決めマークデータの座標位置と前記標準データ保持部６に保持された標準位置決めマークデータ６ａの座標位置とから検査対象の多面化大判紙２の位置補正データ（量）を算出し、これを用紙載置板駆動制御部３Ｂに送出する位置補正処理部５Ｃと、から構成される。
なお、画像読み取り部４の経年変化（劣化）に応じて前記読み取った特定画像データを補正する。
【００１７】
印刷状態判定処理部７は、画像処理部５の読取り画像記憶部５Ｂに記憶された位置補正後の特定画像データ５ｂと標準データ保持部６に保持された標準特定画像データ６ｂとを比較し、その差異の程度により、各検査対象の多面化大判紙２の印刷状態の良否を段階別に判定し、印刷状態判定データを作成する。
【００１８】
判定データ処理部８は、印刷状態判定処理部７で作成した各検査対象の多面化大判紙２の印刷状態判定データを記憶、収集及び管理し、各多面化大判紙の印刷状態データを表示又は印刷する。
【００１９】
画像読取り部（スキャナー）４は、検査対象の多面化大判紙の第１回目の読み取り動作の場合は、図６に示すように、用紙載置部３に載置されたサンプリングされた検査対象の多面化大判紙２の全面をスキャンニング（点線矢印により図示。）することにより、多面化大判紙２の用紙位置決めマーク２Ａ及び特定画像領域ａ、ｂ、ｃ、ｄ（特定画像を含む）を読み取る。また、検査対象の多面化大判紙の位置補正後の読み取り動作の場合は、図７に示すように、特定画像領域ａ、ｂ、ｃ、ｄ（特定画像を含む）を読み取る。この場合、予め、前記多面化大判紙の第１回目の読み取り動作において、読み取った画像を位置補正し、位置補正した特定画像領域中から各特定画像領域ａ、ｂ、ｃ、ｄの先頭位置情報Ｐａ（Ｘ_a 、Ｙ_a ）、Ｐｂ（Ｘ_b 、Ｙ_b ）、Ｐｃ（Ｘ_c 、Ｙ_c ）、Ｐｄ（Ｘ_d 、Ｙ_d ）を算出し、この先頭位置情報Ｐａ、Ｐｂ、Ｐｃ、Ｐｄを用いて各特定画像領域ａ、ｂ、ｃ、ｄを読み取る。
【００２０】
印刷状態判定処理部７は多面化大判紙２から読み取り、且つ位置補正された各特定画像領域ａ、ｂ、ｃ、ｄ内の特定画像データ５ｂと、前記標準データ保持部６の特定画像データ保持部６Ｂに保持された標準特定画像データ６ｂとを比較して多面化大判紙２の印刷状態の良否を段階別に判定する。例えば、特定画像を構成している分割画像領域毎に、印刷状態良、印刷状態不良、印刷状態一部不良、印刷状態注意の４段階判定、又は印刷状態良、印刷状態不良、印刷状態注意の３段階判定のように段階別の判定がされると共に、その異常内容ついては、濃度（カラーの場合は、Ｒ、Ｇ、Ｂの各成分毎に）、画線幅及び外径に関して判定され、且つ表示又は印字される。
【００２１】
印刷状態判定データ処理部８は印刷状態判定処理部７により判別された各多面化大判紙２の印刷状態データを記憶、収集及び管理し、各多面化大判紙の印刷状態データを表示又は印刷する。また、前記印刷状態判定処理部７から判定中の多面化大判紙２の印刷状態が不良であるとの判定結果データを印刷状態判定データ処理部８が受信した場合は、作業者は印刷ラインに対して印刷停止指令（命令）を送出して、直ちに、印刷ラインの印刷動作を停止することにより、以後の印刷不良を未然に防止することもできる。
【００２２】
また、印刷状態判定データ処理部８、画像読取り部（スキャナー）４、画像処理部５、及び印刷状態判定処理部７の各部が個別に夫々処理機能を有する分散型の処理を行う例を示したが、データ処理部８’（点線で囲んだ部分）を前記各部の処理機能を一括して保有する集中型の処理形態にすることもできる。
【００２３】
本発明の印刷状態検査装置１の処理動作を以下に図２を用いて説明する。
標準データ保持部６の位置決めマーク保持部６Ａ及び特定画像データ保持部６Ｂに、基準となる標準データである用紙内の複数の用紙位置決めマークの座標位置データ６ａ及び特定画像領域ａ、ｂ、ｃ、ｄ内の標準特定画像データ６ｂを夫々予め記憶する（Ｓ１）。
【００２４】
印刷ラインで印刷中の多面化大判紙２中から、印刷直後の十分に乾燥していない検査対象の多面化大判紙２をサンプリング抽出する（Ｓ２）。
【００２５】
図４に示すように、用紙載置板３の上面の指定された位置に多面化大判紙２の裏面を真空吸引又は静電気等の吸着手段３Ｃにより吸着しながら載置し（Ｓ３）、図５に示すように、多面化大判紙２を吸着した状態で回転軸３Ａを中心に用紙載置板３を表裏反転させる（Ｓ４）。印刷直後の十分に乾燥していない多面化大判紙２の用紙載置板３への載置をこのようにすることで、従来のような接触による汚染が解消される。
【００２６】
画像読取り部（スキャナー）４の読み取り面４Ａに用紙載置板３上の検査対象の多面化大判紙２を非接触状態で対接させ、画像読取り部（スキャナー）４で図６に示すように、検査対象の多面化大判紙２の全面をスキャンニングして、複数の位置決めマーク２Ａ及び特定画像領域ａ、ｂ、ｃ、ｄ内の特定画像（ｎ面）を読み取り、画像処理部５の位置決めマーク記憶部５Ａ及び読み取り画像記憶部５Ｂに夫々記憶する（Ｓ５）。なお、この際に、先頭位置情報作成部５Ｄで、前記読み取り画像記憶部５Ｂに記憶された特定画像領域ａ、ｂ、ｃ、ｄの特定画像から各特定画像領域ａ、ｂ、ｃ、ｄの先頭位置情報を算出し記憶・保持しておく。
【００２７】
画像処理部５で、読み取った複数の用紙位置決めマーク２Ａの座標位置（座標位置データ５ａ）を算出し、これと標準データ保持部６に予め保持された用紙位置決めマークの座標位置データ６ａとを比較し、位置補正量を算出し、前記位置補正量に基づいて読み取った特定画像（ｎ面）データ５ｂを位置補正する（Ｓ６）。なお、この際に、位置補正量に基づいて、前記先頭位置情報作成部５Ｄで算出し記憶・保持された先頭位置情報を補正しておき、位置補正後の検査対象の多面化大判紙２の読み取り動作を、各特定画像領域ａ、ｂ、ｃ、ｄの先頭位置から行うことができる。
【００２８】
検査対象の多面化大判紙２の用紙位置決めマーク２Ａの座標位置と標準データ保持部６に予め保持された用紙位置決めマークの座標位置とが一致するように、前記位置補正量に応じて用紙載置板駆動制御部３Ｂは用紙載置板３の位置を補正する（Ｓ７）。この位置補正した検査対象の多面化大判紙２を画像読取り部（スキャナー）４で再度多面化大判紙２の全面をスキャンニングして、複数の位置決めマーク２Ａ及び特定画像領域ａ、ｂ、ｃ、ｄ内の特定画像（ｎ面）を読み取る。なお、前記先頭位置情報作成部５Ｄに記憶・保持された先頭位置情報を用いて、各特定画像領域ａ、ｂ、ｃ、ｄの先頭位置から読み取ることもできる。
【００２９】
印刷状態判定処理部７で前記画像処理部５により位置補正された特定画像（ｎ面）データ５ｂと予め記憶された基準特定画像データ６ｂとの比較により、多面化大判紙２の特定画像の印刷精度の検査・判定を行う（Ｓ８）。
【００３０】
判定データ処理部８で、各検査済多面化大判紙毎の検査・判定結果を収集管理、検査・判定結果の表示又はプリントアウトを行う（Ｓ９）。
【００３１】
なお、前記検査・判定結果が印刷不良の場合には、作業者は印刷ラインに印刷中止指令を送出して、印刷ラインを停止することもできる。
【００３２】
なお、前記位置補正においては、位置補正量に応じて用紙載置板３を移動させて、検査対象用紙の位置の補正し、再度、用紙をスキャンニングして、特定画像領域ａ、ｂ、ｃ、ｄ内の特定画像（ｎ面）を読み取り、この再度読み取った特定画像（ｎ面）データ５ｂと予め記憶された標準特定画像データ６ｂとの比較により、多面化大判紙２の特定画像の印刷精度の検査・判定を行ってもよい。
【００３３】
【発明の効果】
本発明は、前記問題点を解決するため、複数の多面化大判紙の中から指定された検査対象の未乾燥の多面化大判紙を取り出して装置上に載置し、この多面化大判紙の画像及び位置決めマークを非接触で読み取り、位置決めマークの座標位置から読み取った画像を正確且つ迅速に位置補正し、補正後の多面化大判紙の各面（各小切れ面）の画像を迅速に認識して各多面化大判紙の印刷状態の良否を迅速に判定し、且つ印刷状態を管理することである。更に、この多面化大判紙の印刷状態検査結果から早期に印刷不良を検出し、それ以後の印刷ラインに印刷不良が発生するのを未然に防止することである。
【００３４】
本発明は印刷状態検査装置に前記用紙載置板を設けることにより、印刷直後の十分に乾燥していない小切れ面が複数面印刷された複数の多面化大判紙の中から指定された多面化大判紙を取り出し、用紙載置板上に多面化大判紙の裏面を吸着手段により吸着しながら載置し、多面化大判紙を吸着した状態で用紙載置板を表裏反転させ、画像読み取り部の読み取り面と非接触状態で対接させているので、汚染することなく読み取ることができ、また、多面化大判紙を画像読み取り部の画像読み取り位置に正確且つ迅速に位置合わせすることができる。
【００３５】
本発明の印刷状態検査装置は多面化大判紙の各面（各小切れ面）の画像を迅速に認識して各多面化大判紙の印刷状態の良否を迅速に判定し、且つ印刷状態を管理することができる。
【００３６】
本発明の印刷状態検査装置は検査対象の多面化大判紙の位置補正後の読み取り動作が、各特定画像領域の先頭位置から読み取るので、読み取り時間を短縮することができる。
【００３７】
本発明の印刷状態検査装置はこの多面化大判紙の印刷状態検査結果により早期に印刷状態の不良を検出し、それ以後の印刷ラインに印刷不良が発生するのを防止することができる。
【図面の簡単な説明】
【図１】本発明の一実施例である多面化大判紙の印刷状態検査装置の概略構成図である。
【図２】本発明の一実施例である多面化大判紙の印刷状態検査装置の一連の処理工程を示す処理工程図である。
【図３】本発明の多面化大判紙の印刷状態検査装置における用紙載置板（多面化大判紙が載置された状態）と多面化大判紙との関係を示す図（平面図）である。
【図４】本発明の多面化大判紙の印刷状態検査装置の構成図（正面図）である。
【図５】本発明の多面化大判紙の印刷状態検査装置における多面化大判紙が載置された用紙載置板が表裏反転した状態を示す図（正面図）である。
【図６】本発明の多面化大判紙の印刷状態検査装置における検査対象の多面化大判紙の第１回目の読み取り動作を示す図（平面図）である。
【図７】本発明の多面化大判紙の印刷状態検査装置における検査対象の多面化大判紙の位置補正後の読み取り動作を示す図（平面図）である。
【符号の説明】
１多面化大判紙の印刷状態検査装置
２多面化大判紙
２Ａ位置決めマーク
２ａ特定画像領域
２ｂ特定画像領域
２ｃ特定画像領域
２ｄ特定画像領域
３用紙載置板
３Ａ回転軸
３Ｂ用紙載置板駆動制御部
３Ｃ用紙吸着手段
４スキャーナー（画像読み取り部）
４Ａスキャーナー読み取り面
５画像処理部
５Ａ位置決めマーク記憶部
５Ｂ読み取り特定画像記憶部
５Ｃ位置補正処理部
６標準データ保持部
６ａ標準位置決めマークデータ
６ｂ標準特定画像データ
７印刷状態判定処理部
８判定データ処理部
８Ａ表示部
８Ｂ印字部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing state inspection apparatus and a printing state inspection method for inspecting a printing state of a large size printed matter (printed sheet) having a plurality of identical images printed on a sheet.
[0002]
[Prior art]
Conventionally, as a method of recognizing or reading a copy-prohibited document such as a banknote, there is an image processing apparatus and an image processing method such as Japanese Patent Application No. 7-165532. For small cut sheets that have been cut from multiple printed large-format prints (hereinafter referred to as multi-sided large format paper) into a single banknote, the original to be read is manually aligned to the correct position, and then the original The image was recognized and the quality of the image was judged. In addition, since it is a contact type, when inspecting a paper that is not sufficiently dried immediately after printing, there is a problem that the original is soiled.
[0003]
In addition, since the recognition target manuscript is a small piece of paper, it is impossible to collectively recognize the images of each piece of multi-faced large format paper, and the determination time of the quality of the multi-faced large form paper becomes longer. There is a problem that it is difficult to manage the printing state (printing state management function) of multi-sided large format paper.
[0004]
[Problems to be solved by the invention]
In order to solve the above problems, the present invention takes out an undried multi-sided large format paper to be inspected from a plurality of multi-sided large format papers, and places them on a mounting plate while adsorbing them. The image and positioning mark of the multi-faced large format paper are read in a non-contact manner, and the position of the image read from the coordinate position of the positioning mark is accurately and quickly corrected. It is to quickly recognize an image, quickly determine whether the printing state of each multi-sided large format paper is good, and manage the printing state. Further, the image and the positioning mark of the multi-sided large format paper that is not sufficiently dried immediately after printing are read without contamination without contact. Further, a printing failure is detected at an early stage from the printing state inspection result of the multi-sided large format paper to prevent the printing failure from occurring in the subsequent printing line.
[0005]
[Means for Solving the Problems]
The multi-sided large-format paper printing state inspection apparatus according to the present invention is designed to inspect and manage the printing state immediately after printing of a multi-sided large-size paper in which the same specific image is printed in each of the specific image areas divided into a plurality of parts. This is a printing state inspection device for large-size paper, and a standard image setting / holding means for presetting / holding standard positioning mark data and standard specific image data which are position coordinates of the positioning mark, and a specific taken out from the printing line A paper placement means for placing a multi-sided large format paper to be inspected on which one or more paper positioning marks are printed outside the image area while adsorbing the back surface thereof, and placing the paper on the paper placement means, and placing the paper on the paper placement means An image reader for reading the paper positioning mark and the specific image in the specific image area from the multi-surface large format paper to be inspected by scanning the multifaceted large format paper that has been printed without contact (Scanner), paper positioning mark data which is the coordinate position data of the paper positioning mark of the multi-sided large format paper before position correction of the read inspection object, and standard positioning mark data held in the standard image setting / holding means, Are compared, and the read image of the multi-sided large format paper to be inspected before correction is corrected so that the coordinate position of the paper positioning mark of the multi-sided large format paper to be inspected matches the coordinate position of the paper positioning mark of the standard image. Printing the multi-sided large format paper by comparing the position correction unit and the specific image in the read image of the multi-sided large format paper to be inspected and the standard specific image held in the standard image setting / holding unit A printing state discriminating means for discriminating the status by stage; and storing, collecting and managing printing status data of each multi-sided large format paper discriminated by the printing state discriminating means And, and a printing state data processing means for displaying or printing the print condition data of each polygon of large format sheets.
[0006]
The multi-sided large-format paper printing state inspection apparatus according to the present invention is designed to inspect and manage the printing state immediately after printing of a multi-sided large-size paper in which the same specific image is printed in each of the specific image areas divided into a plurality of parts. This is a printing state inspection device for large-size paper, and a standard image setting / holding means for presetting / holding standard positioning mark data and standard specific image data which are position coordinates of the positioning mark, and a specific taken out from the printing line Position-correction data sent from a position correction means described later, placed on a multi-sided large-size paper to be inspected, on which one or more paper positioning marks are printed outside the image area, while adsorbing the back side The position of the object to be inspected by scanning the sheet placing means for correcting the position by moving a predetermined amount based on the sheet, and the multi-faced large format paper placed on the sheet placing means in a non-contact manner An image reading means (scanner) for reading the sheet positioning mark and a specific image in the specific image area from a multi-sided large paper before or after position correction, and the multi-sided large paper before position correction of the read inspection object By comparing the paper positioning mark data, which is the coordinate position data of the paper positioning mark, with the standard positioning mark data held in the standard image setting / holding means, the coordinate position of the paper positioning mark of the multi-face large format paper to be inspected is standard. Position correction means for calculating the amount of movement of the paper placement means so as to coincide with the coordinate position of the paper positioning mark of the image and sending the movement amount data to the paper placement means; The printing state of the multi-face large format paper by comparing the specific image in the read image of the large format paper with the standard specific image held in the standard image setting / holding means Print status discrimination means for discriminating by stage, and print status data of each multi-sided large format paper discriminated by the print status discrimination means are stored, collected and managed, and the print status data of each multi-sided large format paper is displayed or printed Printing status data processing means.
[0007]
The present invention is the printing state inspection device for multi-faced large format paper in which the paper placing means performs a suction operation only when the paper is placed.
[0008]
The present invention is a printing state inspection apparatus for multi-face large format paper in which the suction means of the paper placing means is sucked by vacuum suction or static electricity.
[0009]
The present invention is a printing state inspection device for multi-face large format paper that corrects the read specific image data in accordance with aging (deterioration) of the image reading means.
[0010]
The method for inspecting the printing state of a multi-sided large format paper according to the present invention is a multi-sided inspection and management of a printing state immediately after printing of a multi-sided large format paper in which the same specific image is printed in each of the specific image areas divided into a plurality of parts. A method for inspecting the printing state of a large format paper, wherein standard positioning mark data and standard specific image data, which are position coordinates of positioning marks, are preset and stored, and one or more outside the specific image area taken out from the printing line The multi-sided large-size paper to be inspected on which the paper positioning mark is printed is placed on the paper placing plate while adsorbing the back surface thereof, the front and back are reversed, and the multi-faced large paper placed on the paper placing plate is Scanning is performed in a non-contact manner using an image reading means (scanner), the paper positioning mark and the specific image in the specific image area are read from the multi-sided large format paper to be inspected, and the read inspection is performed. Compare the paper positioning mark data, which is the coordinate position data of the paper positioning mark of the multi-sided large format paper before the target position correction, with the standard positioning mark data in which the standard image is set and stored. The position of the read image of the multi-sided large format paper to be inspected before correction is adjusted so that the coordinate position of the paper positioning mark coincides with the coordinate position of the paper positioning mark of the standard image, and the position-corrected multi-sided large format of the inspection target is corrected. A specific image in the read image of the paper is compared with the standard specific image in which the standard image is set and stored to determine the printing state of the multi-sided large format paper, and the determined printing state of each multi-sided large format paper Data is stored, collected and managed, and print state data of each multi-sided large format paper is displayed or printed.
[0011]
The method for inspecting the printing state of a multi-sided large format paper according to the present invention is a multi-sided inspection and management of a printing state immediately after printing of a multi-sided large format paper in which the same specific image is printed in each of the specific image areas divided into a plurality of parts. A method for inspecting the printing state of a large format paper, wherein standard positioning mark data and standard specific image data, which are position coordinates of positioning marks, are preset and stored, and one or more outside the specific image area taken out from the printing line A multi-size large format paper to be inspected printed with a paper positioning mark is placed on the paper plate while adsorbing the back surface thereof, turned upside down, and based on position correction data sent from a position correction means described later. The position is corrected by moving a predetermined amount, and the multi-faced large format paper placed on the paper placement plate is scanned in a non-contact manner using an image reading means (scanner), and the position of the inspection target Coordinate position data of the paper positioning mark of the multi-faced large format paper before the position correction of the read inspection object is read from the paper positioning mark and the specific image in the specific image area from the front or post-position corrected multi-faced large format paper The paper positioning mark data is compared with the standard positioning mark data in which the standard image is set and stored, and the coordinate position of the paper positioning mark on the multi-face large format paper to be inspected matches the coordinate position of the paper positioning mark in the standard image The movement amount of the paper placement plate is calculated, the movement amount data is sent to the paper placement plate to correct the position, and the position-corrected specific image in the read image of the multi-sided large format paper to be inspected By comparing the standard image set and stored standard specific image with each other, the printing state of the multi-faced large format paper is discriminated step by step. Storing data collected and managed, so that to display or print the print condition data of each polygon of large format sheets.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention prints a multi-sided large format paper for inspecting and managing the printing state immediately after printing of the multi-sided large format paper 2 on which the same image is printed in each of the specific image areas a, b, c, d divided into a plurality of parts. As shown in FIG. 3, one or more paper positioning marks 2A are printed in advance outside the specific image area of the multi-face large format paper.
[0013]
As shown in FIG. 1, the printing state inspection apparatus 1 includes a sheet placing plate 3, an image reading unit (scanner) 4, an image processing unit 5, a standard data holding unit 6, a printing state determination processing unit 7, and a determination data processing unit. 8. The standard data holding unit 6 includes standard positioning mark data 6a and standard specific image data 6b which are position coordinate data of a paper positioning mark, which are standard data serving as a standard for images of the multi-face large format paper 2 to be inspected. Are held in advance.
[0014]
As shown in FIGS. 1 and 4, the sheet placing plate 3 has a rotation shaft 3 </ b> A for rotating the sheet placement plate 3 and a rotation shaft based on position correction data from a position correction processing unit 5 </ b> C of the image processing unit 5 described later. Position correction control of the multi-sided large format paper 2 to be inspected that is moved or rotated in the XY directions and sucked on the paper placing plate 3 and the suction operation for sucking the multi-sided large format paper 2 to the paper placing plate 3 And a paper placement plate drive control unit 3B for controlling the above.
For example, when the position correction amount is Xmm (millimeter) in the horizontal left direction, the position is corrected by moving Xmm (millimeter) in the horizontal right direction.
When the position correction amount is Ymm (millimeter) in the vertical upward direction, the position is corrected by moving Ymm (millimeter) in the vertical downward direction.
If the position shift is tilted around a certain position, the position is corrected by rotating it to the standard position by the tilt amount around that point.
[0015]
As shown in FIG. 6, the image reading unit (scanner) 4 scans the entire surface of the sampled multi-sided large format paper 2 placed on the paper placing plate 3 (illustrated by dotted arrows). As a result, the paper positioning mark 2A of the multi-faced large format paper 2 and the specific images in the specific image areas a, b, c and d are read.
[0016]
The image processing unit 5 reads the paper positioning mark data from the image data read by the image reading unit (scanner) 4 and stores it in the same manner as the paper positioning mark storage unit 5A, and the position read by the image reading unit (scanner) 4. A read image storage unit 5B for extracting and storing specific image data from image data before correction or after position correction, a coordinate position of the read sheet positioning mark data, and a standard positioning mark held in the standard data holding unit 6 The position correction processing unit 5C calculates position correction data (amount) of the multi-sided large format paper 2 to be inspected from the coordinate position of the data 6a, and sends this to the sheet placement plate drive control unit 3B. .
The read specific image data is corrected according to the secular change (deterioration) of the image reading unit 4.
[0017]
The printing state determination processing unit 7 compares the position-corrected specific image data 5b stored in the read image storage unit 5B of the image processing unit 5 with the standard specific image data 6b held in the standard data holding unit 6, According to the degree of the difference, the quality of the printed state of the multi-sided large format paper 2 to be inspected is determined for each stage, and print state determination data is created.
[0018]
The determination data processing unit 8 stores, collects, and manages the printing state determination data of each inspection target multi-sided large sheet 2 created by the printing state determination processing unit 7, and displays or displays the printing state data of each multi-sided large sheet. Print.
[0019]
In the first reading operation of the multi-sided large format paper to be inspected, the image reading unit (scanner) 4, as shown in FIG. 6, reads the sampled inspection target placed on the paper placement unit 3. By scanning the entire surface of the multi-faced large format paper 2 (illustrated by dotted arrows), the sheet positioning marks 2A and specific image areas a, b, c, and d (including the specific image) of the multi-faced large format paper 2 are read. . Further, in the case of a reading operation after correcting the position of the multi-sided large format paper to be inspected, the specific image areas a, b, c, and d (including the specific image) are read as shown in FIG. In this case, in the first reading operation of the multi-face large format paper, the position of the read image is corrected in advance, and the head position information of each specific image area a, b, c, d from the position-corrected specific image area Pa (X _a , Y _a ), Pb (X _b , Y _b ), Pc (X _c , Y _c ), Pd (X _d , Y _d ) are calculated, and this head position information Pa, Pb, Pc, Pd Are used to read each specific image area a, b, c, d.
[0020]
The printing state determination processing unit 7 reads specific image data 5b in each of the specific image areas a, b, c, and d read from the multi-sided large format paper 2 and corrected in position, and holds the specific image data in the standard data holding unit 6 The standard specific image data 6b held in the section 6B is compared with each other to determine whether the printing state of the multi-face large format paper 2 is good or not. For example, for each divided image area constituting the specific image, a four-step determination of a good print state, a bad print state, a partial print state failure, a print state caution, or a good print state, a bad print state, a bad print state A determination according to each stage is made as in the three-stage determination, and the abnormality content is determined with respect to density (in the case of color, for each of R, G, and B components), image line width, and outer diameter, and Displayed or printed.
[0021]
The printing state determination data processing unit 8 stores, collects, and manages the printing state data of each multi-sided large sheet 2 determined by the printing state determination processing unit 7, and displays or prints the printing state data of each multi-sided large sheet. . When the print state determination data processing unit 8 receives determination result data indicating that the print state of the multi-face large format paper 2 being determined from the print state determination processing unit 7 is defective, the operator enters the print line. On the other hand, by sending a print stop command (command) and immediately stopping the printing operation of the print line, it is possible to prevent subsequent printing defects.
[0022]
In addition, an example is shown in which each of the printing state determination data processing unit 8, the image reading unit (scanner) 4, the image processing unit 5, and the printing state determination processing unit 7 individually performs distributed processing having a processing function. However, the data processing unit 8 ′ (portion surrounded by a dotted line) can be in a centralized processing mode that collectively holds the processing functions of the respective units.
[0023]
The processing operation of the printing state inspection apparatus 1 of the present invention will be described below with reference to FIG.
Coordinate position data 6a and specific image areas a, b, c, and a plurality of paper positioning marks in the paper, which is standard data serving as a reference, are added to the positioning mark holding unit 6A and the specific image data holding unit 6B of the standard data holding unit 6. The standard specific image data 6b in d is stored in advance (S1).
[0024]
From the multi-sided large format paper 2 being printed on the printing line, the multi-sided large format paper 2 to be inspected which is not sufficiently dried immediately after printing is sampled and extracted (S2).
[0025]
As shown in FIG. 4, the back surface of the multi-faced large format paper 2 is placed at a specified position on the upper surface of the paper placement plate 3 while being sucked by suction means 3C such as vacuum suction or static electricity (S3). As shown in FIG. 4, the sheet placement plate 3 is turned upside down around the rotation shaft 3A with the multi-sided large format paper 2 adsorbed (S4). By placing the multi-sided large format paper 2 that has not been sufficiently dried immediately after printing on the paper placement plate 3 in this way, contamination due to contact as in the past is eliminated.
[0026]
As shown in FIG. 6, the multi-sided large format paper 2 to be inspected on the paper placing plate 3 is brought into contact with the reading surface 4A of the image reading unit (scanner) 4 in a non-contact state. The entire surface of the multi-sided large format paper 2 to be inspected is scanned to read a plurality of positioning marks 2A and specific images (n-plane) in the specific image areas a, b, c, and d, and the positioning of the image processing unit 5 The data is stored in the mark storage unit 5A and the read image storage unit 5B (S5). At this time, the head position information creation unit 5D uses the specific image regions a, b, c, and d stored in the read image storage unit 5B from the specific images of the specific image regions a, b, c, and d. First position information is calculated and stored / held.
[0027]
The image processing unit 5 calculates the coordinate positions (coordinate position data 5a) of the plurality of read paper positioning marks 2A, and compares this with the coordinate position data 6a of the paper positioning marks held in advance in the standard data holding unit 6. Then, the position correction amount is calculated, and the position of the specific image (n-plane) data 5b read based on the position correction amount is corrected (S6). At this time, based on the position correction amount, the head position information calculated, stored and held by the head position information creating unit 5D is corrected, and the multi-sided large format paper 2 to be inspected after position correction is corrected. The reading operation can be performed from the head position of each specific image area a, b, c, d.
[0028]
The paper placement is performed according to the position correction amount so that the coordinate position of the paper positioning mark 2A of the multi-sided large format paper 2 to be inspected matches the coordinate position of the paper positioning mark held in advance in the standard data holding unit 6. The plate drive control unit 3B corrects the position of the paper placement plate 3 (S7). The position-corrected multi-sided large format paper 2 to be inspected is scanned again by the image reading unit (scanner) 4 and the entire surface of the multi-sided large format paper 2 is scanned, and a plurality of positioning marks 2A and specific image areas a, b, c, A specific image (n-plane) in d is read. It is also possible to read from the head positions of the specific image areas a, b, c, and d using the head position information stored / held in the head position information creating unit 5D.
[0029]
By printing the specific image (n-side) data 5b whose position has been corrected by the image processing unit 5 in the printing state determination processing unit 7 and the reference specific image data 6b stored in advance, printing of the specific image on the multi-sided large format paper 2 is performed. Inspection / determination of accuracy is performed (S8).
[0030]
The determination data processing unit 8 collects and manages the inspection / determination results for each inspected multifaceted large format paper, and displays or prints out the inspection / determination results (S9).
[0031]
If the inspection / determination result is a print failure, the operator can send a print stop command to the print line to stop the print line.
[0032]
In the position correction, the sheet placement plate 3 is moved in accordance with the position correction amount, the position of the inspection target sheet is corrected, the sheet is scanned again, and the specific image areas a, b, and c are scanned. The specific image (n-side) in d is read, and the specific image (n-side) data 5b read again is compared with the standard specific image data 6b stored in advance to print the specific image on the multi-sided large format paper 2 You may inspect and judge the accuracy.
[0033]
【The invention's effect】
In order to solve the above problems, the present invention takes out an undried multi-sided large format paper to be inspected from a plurality of multi-sided large format papers, and places them on the apparatus. Reads images and positioning marks in a non-contact manner, corrects the position of the image read from the coordinate position of the positioning marks accurately and quickly, and quickly recognizes the image on each side (each small cut surface) of the multi-faced large format paper after correction. Thus, it is possible to quickly determine the quality of the printing state of each multi-sided large format paper and manage the printing state. Further, a printing failure is detected at an early stage from the printing state inspection result of the multi-sided large format paper to prevent the printing failure from occurring in the subsequent printing line.
[0034]
According to the present invention, by providing the paper placement plate in the printing state inspection apparatus, the multiple-sided printing designated from among the multiple-sided large-format paper on which a plurality of small-cut surfaces that are not sufficiently dried immediately after printing are printed. Take out the large format paper, place it on the paper placement plate while adsorbing the back side of the multifaceted large format paper with the suction means, and turn the paper placement plate upside down with the multifaceted large format paper adsorbed. Since it is in contact with the reading surface in a non-contact state, it can be read without being contaminated, and the multi-sided large format paper can be accurately and quickly aligned with the image reading position of the image reading unit.
[0035]
The printing state inspection apparatus of the present invention quickly recognizes images on each side (each small cut surface) of a multi-sided large format paper, quickly determines whether the printing status of each multi-sided large format paper is good, and manages the printing status. can do.
[0036]
The printing state inspection apparatus of the present invention can reduce the reading time because the reading operation after the position correction of the multi-sided large format paper to be inspected is read from the top position of each specific image area.
[0037]
The printing state inspection apparatus of the present invention can detect a printing state failure at an early stage based on the printing state inspection result of the multi-faced large format paper, and can prevent a printing failure from occurring on the subsequent printing line.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a printing state inspection apparatus for multi-faced large format paper according to an embodiment of the present invention.
FIG. 2 is a process chart showing a series of process steps of a printing state inspection apparatus for multi-faced large format paper according to an embodiment of the present invention.
FIG. 3 is a diagram (plan view) illustrating a relationship between a sheet placing plate (a state in which a multi-faced large format paper is placed) and the multi-faced large format paper in the printing state inspection apparatus for a multi-faced large form paper according to the present invention. .
FIG. 4 is a configuration diagram (front view) of a printing state inspection apparatus for multi-sided large format paper according to the present invention.
FIG. 5 is a diagram (a front view) illustrating a state where a sheet placing plate on which a multi-sided large format paper is placed is turned upside down in a printing state inspection apparatus for a multi-sided large paper according to the present invention.
FIG. 6 is a diagram (plan view) illustrating a first reading operation of the multi-sided large format paper to be inspected in the multi-sided large format printing state inspection apparatus of the present invention.
FIG. 7 is a diagram (plan view) illustrating a reading operation after position correction of a multi-sided large format paper to be inspected in the multi-sided large format print state inspection apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Printing condition inspection apparatus of multi-sided large format paper 2 Multi-sided large format paper 2A Positioning mark 2a Specific image area 2b Specific image area 2c Specific image area 2d Specific image area 3 Paper mounting board 3A Rotating shaft 3B Paper mounting board drive control part 3C Paper adsorption means 4 Scanner (image reading unit)
4A Scanner reading surface 5 Image processing unit 5A Positioning mark storage unit 5B Reading specific image storage unit 5C Position correction processing unit 6 Standard data holding unit 6a Standard positioning mark data 6b Standard specific image data 7 Print state determination processing unit 8 Determination data processing unit 8A Display section 8B Printing section

Claims

A printing state inspection apparatus for a multi-face large format paper for inspecting and managing a print state immediately after printing of a multi-face large format paper in which the same specific image is printed in each of the specific image areas divided into a plurality of areas,
Standard image setting / holding means for presetting / holding standard positioning mark data and standard specific image data which are position coordinates of the positioning mark,
A paper placement means for placing the multiple-sided large-size paper to be inspected, on which one or more paper positioning marks are printed outside the specific image area, taken out from the printing line, while adsorbing the back surface, and reversing the front and back;
Image reading means for reading the paper positioning mark and the specific image in the specific image area from the multi-faced large paper to be inspected by scanning the multi-faced large paper placed on the paper placement means without contact. (Scanner)
Compare the paper positioning mark data, which is the coordinate position data of the paper positioning mark of the multi-sided large format paper before position correction of the read inspection object, with the standard positioning mark data held in the standard image setting / holding means, and inspect Position correcting means for correcting the position of the read image of the multi-sided large format paper to be inspected before correction so that the coordinate position of the paper positioning mark of the target multi-sided large paper matches the coordinate position of the paper positioning mark of the standard image;
The printing state of the multi-face large format paper is determined in stages by comparing the specific image in the read image of the multi-face large format paper to be inspected and the standard specific image held in the standard image setting / holding means. Printing status determination means to perform,
Printing state data processing means for storing, collecting and managing the printing status data of each multi-sided large format paper determined by the printing status determining means, and displaying or printing the printing status data of each multi-sided large format paper;
A printing state inspection apparatus for multi-faced large format paper, characterized by comprising:

A printing state inspection apparatus for a multi-face large format paper for inspecting and managing a print state immediately after printing of a multi-face large format paper in which the same specific image is printed in each of the specific image areas divided into a plurality of areas,
Standard image setting / holding means for presetting / holding standard positioning mark data and standard specific image data which are position coordinates of the positioning mark,
A multi-size large format paper to be inspected on which one or more paper positioning marks are printed outside the specific image area taken out from the printing line is placed while adsorbing the back surface, reversed, and position correction described later. A paper loading means for correcting the position by moving a predetermined amount based on the position correction data sent from the means;
The multi-position large format paper placed on the paper placement means is scanned in a non-contact manner from the multi-position large format paper before or after the position correction of the inspection object, and the sheet positioning mark and the specific image area. Image reading means (scanner) for reading specific images of
Compare the paper positioning mark data, which is the coordinate position data of the paper positioning mark of the multi-sided large format paper before position correction of the read inspection object, with the standard positioning mark data held in the standard image setting / holding means, and inspect The movement amount of the paper placing means is calculated so that the coordinate position of the paper positioning mark of the target multi-faced large format paper matches the coordinate position of the paper positioning mark of the standard image, and the movement amount data is sent to the paper placement means. Position correction means;
The printing state of the multi-face large format paper is determined in stages by comparing the specific image in the read image of the multi-face large format paper to be inspected and the standard specific image held in the standard image setting / holding means. Printing status determination means to perform,
Printing state data processing means for storing, collecting and managing the printing status data of each multi-sided large format paper determined by the printing status determining means, and displaying or printing the printing status data of each multi-sided large format paper;
A printing state inspection apparatus for multi-faced large format paper, characterized by comprising:

3. The apparatus for inspecting a printing state of multi-faced large format paper according to claim 1 or 2, wherein the paper placing means performs a suction operation only when the paper is placed.

4. The printing state inspection apparatus for multi-faced large-format paper according to claim 3, wherein the suction means of the paper placing means is sucked by vacuum suction or static electricity.

3. The printing state inspection apparatus for multi-faced large format paper according to claim 1, wherein the read specific image data is corrected in accordance with a secular change (deterioration) of the image reading means.

A method for inspecting and managing a printing state of a multi-sided large format paper, which inspects and manages a printing state immediately after printing of the multi-sided large format paper in which the same specific image is printed in each of the specific image areas divided into a plurality of areas,
Standard positioning mark data and standard specific image data, which are the position coordinates of the positioning mark, are preset and stored,
Placed on the paper plate while adsorbing the back side of the large-size large-size paper to be inspected, on which one or more paper positioning marks are printed outside the specific image area, which is taken out from the printing line,
The multi-sided large format paper placed on the paper placement plate is scanned in a non-contact manner using an image reading means (scanner), and the multi-sided large format paper to be inspected is scanned from the paper positioning mark and the specific image area. Scan a specific image,
Compare the paper positioning mark data, which is the coordinate position data of the paper positioning mark of the multi-sided large format paper before position correction of the read inspection target, with the standard positioning mark data in which the standard image is set and stored, and The position of the scanned image of the multi-sided large format paper to be inspected before correction is adjusted so that the coordinate position of the paper positioning mark on the large-size paper matches the coordinate position of the paper positioning mark on the standard image
Compare the specific image in the read image of the multi-sided large format paper to be inspected and the standard specific image in which the standard image is set and stored, and determine the printing state of the multi-sided large format paper step by step,
The printing state data of each multi-sided large format paper is stored, collected and managed, and the printing status data of each multi-sided large format paper is displayed or printed. Inspection method.

A method for inspecting and managing a printing state of a multi-sided large format paper, which inspects and manages a printing state immediately after printing of the multi-sided large format paper in which the same specific image is printed in each of the specific image areas divided into a plurality of areas,
Standard positioning mark data and standard specific image data, which are the position coordinates of the positioning mark, are set and stored in advance.
A multi-sided large format paper to be inspected, on which one or more paper positioning marks are printed out of the specific image area, taken out from the printing line, is placed on the paper price plate while adsorbing the back side, and turned upside down. In addition, the position is corrected by moving a predetermined amount based on the position correction data sent from the position correction means described later,
The multi-sided large format paper placed on the paper placement plate is scanned in a non-contact manner using an image reading means (scanner), and the paper from the multi-sided large format paper before or after position correction of the inspection object is performed. Read the positioning mark and the specific image in the specific image area,
Compare the paper positioning mark data, which is the coordinate position data of the paper positioning mark of the multi-sided large format paper before position correction of the read inspection target, with the standard positioning mark data in which the standard image is set and stored, and Calculate the amount of movement of the paper placement plate so that the coordinate position of the paper positioning mark on the large format paper matches the coordinate position of the paper positioning mark on the standard image, and send the movement amount data to the paper placement plate to correct the position. And
Compare the specific image in the read image of the multi-faced large format paper to be inspected and the standard specific image set and stored in the standard image to determine the printing state of the multi-faced large format step by step,
Printing of multi-sided large format paper characterized in that the determined printing status data of each multi-sided large format paper is stored, collected and managed, and the printing status data of each multi-sided large format paper is displayed or printed. Condition inspection method.