JP4228038B2 - Printed matter inspection method and apparatus - Google Patents

Printed matter inspection method and apparatus Download PDF

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Publication number
JP4228038B2
JP4228038B2 JP17828099A JP17828099A JP4228038B2 JP 4228038 B2 JP4228038 B2 JP 4228038B2 JP 17828099 A JP17828099 A JP 17828099A JP 17828099 A JP17828099 A JP 17828099A JP 4228038 B2 JP4228038 B2 JP 4228038B2
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Japan
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printed matter
magnetic
detection head
magnetic detection
printed
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JP17828099A
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JP2001001506A (en
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中 利 典 田
坂 利 壽 小
上 靖 雄 村
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Glory Ltd
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Glory Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、紙幣をはじめ、国債、切手等の特殊インキを使用して印刷される証券類のように一定の品質を備えしめるための印刷物検査方法およびその装置に関する。
【0002】
【従来の技術】
例えば紙幣の場合、通常図16に示すように1枚の紙幣aが4列5行計20枚分を用紙bに同時印刷(大判印刷)し、印刷後インキの乾燥を待ってその余白部(C),(C)…において裁断することにより紙幣とされるようになされている。
【0003】
従来流通紙幣においては、上記磁気の検出手段として磁気検出用ヘッドを紙幣の印刷面に接触させて紙幣の所定箇所のインキの磁気特性を検出することにより真偽の鑑別を行なうようにしている。
【0004】
【課題を解決するための手段】
しかして紙幣の印刷においては、予め印刷インキの配合を定め、輪転印刷機により大判印刷されるが、その大判印刷された紙幣のインキが適正な磁気特性を有するか否かのチェックを従来の磁気検出用ヘッドを用いて行なうにはインキが完全に乾燥してからでないと実行することができず、そのため待ち時間が長くなる。
【0005】
本発明は、印刷直後のインキが未乾燥の状態であってもインキが有する磁気特性を正確に検出することができる印刷物検査方法およびその装置を提供することを課題としてなされたものである。
【0006】
上記課題を解決するため本発明は、印刷直後の印刷物を台盤上に載置し、その印刷物の印刷面に対し磁気検出用ヘッドを一定の非接触微小間隙を保って非接触で走査することによりインキが未乾燥の状態であってもインキが保有する磁気特性を適確に検出検査するようにしたことにある。
【0007】
上記のように磁気検出用ヘッドを印刷物の印刷面に非接触で走査させることにより、インキの磁気特性を検出するに当り、印刷物が浮き上がったりしていると印刷面と磁気検出用ヘッドとの間の間隙にばらつきが生じ、検出精度が極端に低下する。特に紙幣の大判印刷物の場合は面積も大きいことから部分的な波打ちやしわ等が発生しやすく、そのため検出精度を一定に保つことが難しい。
【0008】
かかることから本発明は、大きな印刷物であっても平坦な表面を有する台盤上の基準位置に載置してこの印刷物を不動状態にクランプする際にその印刷物に波打ちやしわを生じることなく確実にクランプすることを可能とするクランプ手段と、磁気検出用ヘッドを印刷物の印刷面に対し一定の間隙を保持して走査することを可能とする磁気検出用ヘッドの非接触微小間隙を保持しての離間支持手段、磁気検出用ヘッドによる印刷物の検出箇所の平坦性を確保することを可能とする印刷物浮き上がり防止手段を備えた検査装置を提供することにある。
【0009】
すなわち、印刷直後でインキが未乾燥の大判印刷物を、平坦な上面を有するとともに非磁性体からなる台盤上に載置する工程と磁気検出用ヘッドを、インキが未乾燥の前記大判印刷物の印刷面に対して一定の非接触微小間隙を保持しつつ、該大判印刷物の磁気特性検出箇所にわたって走査させることによりインキが保有する磁気特性を示す曲線を検出する工程と、を備えたことを特徴とする印刷物検査方法を請求項1とする。
【0010】
請求項2は、上記検査方法において、印刷物の特性検出部の近傍にあって、基準となる所定の磁気特性を備えるとともに磁気検出用ヘッドの磁気測定面と面接し得る接合面を有しかつ当該接合面が前記ヘッドの測定面に密接し得る方向に進退自在とされた基準マーカを用い、前記磁気検出ヘッドは、前記磁気測定面に前記接合面との距離を計測する距離センサを備え、前記磁気検出用ヘッドの磁気測定面と前記基準マーカの接合面とを密着させて距離値ゼロでの前記基準マーカの磁気特性値を測定することにより前記磁気検出用ヘッドを校正し、前記印刷物の磁気特性を示す曲線を検出するようにしたものである。
【0011】
また請求項3は、前記磁気検出用ヘッドが、前記距離センサにより印刷物との距離を測定し、前記距離センサによって測定される印刷物との距離に基づき、検出された前記磁気特性を示す曲線を補正するようにしたものである
【0012】
請求項4は、大判の印刷物を載置する平坦な上面を有する台盤と、この台盤の両側部に配設された左右のクランプ機構と、前記台盤上に載置される印刷物の磁気特性検出箇所を走査するよう印刷物の印刷面に非接触で移動自在に設けられた磁気検出用ヘッドとを備え、印刷物の台盤上への挿入セット時に挿入基準先端側に位置するクランプ機構は、印刷物の挿入基準先端縁中央部を最先にクランプするクランプ爪と、これより遅れて挿入基準先端縁両側部をクランプするクランプ爪とを有し、印刷物の挿入基準後端側に位置するクランプ機構は、印刷物の挿入基準後端縁両側部をクランプするクランプ爪を有し、このクランプ爪はクランプ後印刷物の挿入基準後端両側部を斜め外方へ向け引張るよう旋回自在としてなり、前記挿入基準先端側中央のクランプ爪がクランプしたのち挿入基準後端側のクランプ爪がクランプして旋回し、次いで挿入基準先端側両側部のクランプ爪がクランプするようにしたことを特徴とする印刷物検査装置にある。
【0013】
請求項5は、大判の印刷物を載置する平坦な上面を有する台盤と、この台盤の両側部に配設された左右のクランプ機構と、前記台盤上に載置される印刷物のインキが保有する磁気特性を検出する磁気検出用ヘッドとを備え、前記磁気検出用ヘッドは、印刷物の余白部に接して転動し得るよう所定の間隔をおいて軸支される左右のローラ間の軸に該軸の軸方向および上下方向に位置調整可能に支持され、前記ローラに対し前記磁気検出用ヘッドのヘッド面が印刷面から所定の間隙をおいて離間支持するようにしたものであり、請求項6は、前記ローラを左右複数対とし、そのうちの左右一対のローラを前記磁気検出用ヘッドの真横に位置させたことにある。さらに請求項7は、平坦な上面を有するとともに、非磁性体からなり、印刷直後でインキが未乾燥の大判印刷物を載置する台盤と、インキが未乾燥の前記大判印刷物の印刷面に対して一定の非接触微小間隙を保持しつつ、該大判印刷物の磁気特性検出箇所にわたって走査することによりインキが保有する磁気特性を示す曲線を検出する磁気検出用ヘッドと、を備え、前記磁気検出用ヘッドが、その下面のヘッド面に複数個のエア噴出口を有し、磁気特性検出時に前記大判印刷物の検出箇所上面にエア供給源からの圧縮エアを噴出して前記検出印刷面の平坦性を得るように構成されていることを特徴とする印刷物検査装置である。このように、前記磁気検出用ヘッドの下面のヘッド面に複数個のエア噴出口を設け、磁気特性検出時に印刷物の検出箇所上面にエア供給源からの圧縮エアを噴出して印刷面の平坦性を得るようにしているので、対象印刷物を載置する台盤は必ずしも平面的なものでなく、円筒面である場合であっても適用することができる。
【0014】
【発明の実施の形態】
以下、本発明を図面に示す実施の形態を参照して説明する。
【0015】
図1は本発明を紙幣の印刷過程における大判印刷物のインキが保有する磁気特性を検査する装置とした場合の一実施形態を示すもので、装置本体1に人手により大判印刷物(以下単に印刷物という)を出し入れしやすい高さ位置に上面が平坦な厚さ30mm程度で印刷物を平坦状に載置し得る大きさを有するガラス等の非磁性体からなる台盤2が水平に固設され、この台盤2の設置箇所の左右両側部は側板3,3でカバーされ、この側板3,3にそって上面の範囲を開閉するシャッタ4と、前面の範囲を開閉するシャッタ5とがいずれもスライドおよび開閉式に開閉自在に設けられている。
【0016】
前記台盤2の上面位置には磁気検出用ヘッドユニット6が図示しないX軸、Y軸にそって通常のロボットと同様にX・Y平面内で縦横方向および上下(Z軸)方向に移動自在に設けられ、これら各方向への移動はX軸用サーボモータ、Y軸用サーボモータ、Z軸用駆動モータとボールネジ機構およびクランク機構によってなされる。
【0017】
前記台盤2の左端位置には、印刷物Pを右方から左方へ向けて台盤2上へ挿入載置するときその挿入方向先端が当接する基準位置であって印刷物Pの先端縁を複数箇所でクランプする先端側のクランプ機構7が、同じく挿入方向後端側にあって印刷物Pの後端縁の両側をクランプする後端側のクランプ機構8がそれぞれ設けられており、台盤2の手前側中央位置付近左右には印刷物Pの手元端縁を当接して位置決めするための一対の位置決めピン9,9が上向きに出没自在に設けられているとともに印刷物Pが正しく置かれたか否かを検知する位置確認センサ(図示せず)が設けられている。
【0018】
図2(A)は先端基準側および後端側のクランプ機構7,8のクランプ爪の位置関係を示し、同(B)はその側面よりみた図を示すもので、先端側クランプ機構7は、印刷物Pの挿入方向先端縁の中央に位置する中央クランプ爪10と、このクランプ爪10の両サイドに位置する片側2個ずつのサイドクランプ爪11,11と、その外側の両隅部に位置する端部クランプ爪12,12とを有し、これらクランプ爪10,11,12は印刷物Pの挿入基準先端縁にそって配設されるハンドル軸13の手元端のハンドル14を図2(A)の矢印方向への回動操作によりそれぞれ所定のタイミングで作動されるようになっており、中央およびサイドクランプ爪10,11は上下動を、端部クランプ爪12は上下動と旋回動を行なうようになっている。
【0019】
図3〜図5の(A)はハンドル軸13のハンドル14の回動位置を示し、同(B)は中央クランプ爪10の、同(C)はサイドクランプ爪11の各動作状態を示しており、端部クランプ爪12は前記のように旋回動が加わるので図3(D)に正面を、図6に平面図を示している。
【0020】
前記中央クランプ爪10およびサイドクランプ爪11は略同じ構造を有するもので、装置本体1側に上下動自在に支持される垂直な基部10a,11aの上端に印刷物Pの挿入方向先端縁Pa側に向く押え部10b,11bが直角方向に屈曲形成され、その下面にはゴム材等の摩擦部片10c,11cが貼着されている。
【0021】
前記基部10a,11aには下向きの当接部10d,11dが形成されており、この当接部10d,11dに前記ハンドル軸13に固着のアーム15,16の先端のローラ17,18(ベアリング)が当接され、ハンドル軸13の図3において時計方向の回動に伴って各クランプ爪10,11が自重で下降するように構成されている。
【0022】
前記各クランプ爪10,11の基部10a,11aの下端には、印刷物Pの挿入基準先端縁が当る側とは反対側に延びる板バネ等からなる弾性板19,20が設けられており、前記アーム15,16の回動時にそのローラ17,18が弾性板19,20の上面に移行し、これを弾性的に押し下げることによって前記押え部10b,11bの下面を印刷物Pに圧接させるようになっている。
【0023】
なお上記当接部10d,11dは中央クランプ爪10の当接部10dよりサイドクランプ爪11の当接部11dの方が若干高い位置に設けらてれおり、中央クランプ爪10が図4(B)のように先に印刷部Pの上面に当接するように形成されている。そして上記押え部10bが印刷物Pに当接したのちにおけるアーム15の回動を許容するため中央クランプ爪10の弾性板19は長くかつ上向きに湾曲されていてアーム15のローラ17が弾性板19を押し続けるようになされている。
【0024】
前記端部クランプ爪12は、装置本体1側に縦軸21により上下動および旋回動可能に支持され、その一端が押え部12aとされて下面に摩擦部片12bが貼着されており、印刷物Pの挿入方向先端縁に平行に設けられるハンドル軸13のアーム23のローラ24が端部クランプ爪12の押え部12aとは反対側の下面にバネ25による付勢を受けて当接されていて、ハンドル軸13の回動に伴って前記中央クランプ爪10と同じタイミングで下降するようになっている。
【0025】
また前記ハンドル軸13には周面の一部が切欠されたカム27が固着されており、このカム27の周面に前記端部クランプ爪12の下面に軸着されたローラ28(ベアリング)が図示しないバネ付勢を受けて当接されていて、中央クランプ爪10および端部クランプ爪12,12の押え部12aが印刷物Pの上面を押えた時点でローラ28がカム27の低所27aに落ち込んで端部クランプ爪12が軸21を中心に図2(A)および図6に矢印で示す方向にそれぞれ旋回し、これにより中央を中央クランプ爪10で押えられた印刷物Pの挿入基準先端縁の両端が図2(A)に矢印(a)で示す方向に引張られ、しわ延ばしがなされる。
【0026】
なおハンドル14を元に戻せば前記とは逆に各クランプ爪10,11,12は上方へ戻り、印刷物Pの押圧が解放される。
【0027】
後端側のクランプ機構8は、図2(A)に示すように印刷物Pの挿入基準後端縁の上下の余白部に位置するクランプ爪30,30を有し、図7〜図9にその一方を示している。
【0028】
このクランプ機構8のハンドル軸31は、上記後端縁に平行する方向に配設されかつ手元端にあるハンドル32を図2(A)において矢印方向に回動操作することにより途中回転変換機構33(詳細は図示省略)を介して回転されるようになっており、そのクランプ爪30の押え部30aおよびこれに対向するクランプ爪30cが印刷物Pの挿入基準後端縁の上下端位置に当接して押圧挾持したのち図2(A)の矢印方向に旋回して印刷物Pの挿入方向後端両隅部を図2(A)の矢印(b)で示す方向に引き延ばす動きをなすようになっている。なお上記クランプ爪30の押え部30aの下面およびクランプ爪30cの上面は印刷物Pに対し所要のフリクションをもって接するようになっており、旋回動時に印刷物Pを引き延ばしきったのちは滑るようになっている。
【0029】
すなわち後端側のクランプ爪30、30cは図9に示すように平面視略矩形状を有し、このクランプ爪30は装置本体1側に軸34により水平面内で旋回可能に枢支されたホルダ35の自由端側の上部にリンク機構36を介して支持されており、このホルダ35およびホルダ35に連結されたクランプ爪30cはハンドル軸31の回転によって前記軸34を中心に旋回するようになっている。
【0030】
上記旋回のための機構は、装置本体1側に固設の固定壁37とホルダ35の一側に立ち上がる壁部38との間にハンドル軸31が位置され、このハンドル軸31の直径方向に作動片39,39が固着されていて、この作動片39,39はハンドル軸31と同軸上に設けられたカム体40の直径線上対象位置にセクタ状に切欠された遊動凹部41,41内に位置されている。
【0031】
このカム体40とは別にハンドル軸31には、直径方向対象位置に高所42,42を有する押圧カム43が前記高所42,42と前記遊動凹部41,41とを同位相として固着され、また別にハンドル軸31には前記リンク機構36を連結するための連結部材44が固着されている。
【0032】
前記リンク機構36は、図7、図8に一例を示すように、前記ホルダ35の軸受45に一端が枢支された第1リンク46と、前記連結部材44に一端が枢支され他端の長孔47aが前記第1リンク46の中間位置に設けられたピン48に遊動的に嵌合された第2リンク47と、基端がホルダ35側に軸49により枢支された端部クランプ爪30の中間位置と前記第1リンク46の他端とを連結する第3リンク50とで構成されており、前記連結部材44と前記第1リンク46との間には引張バネ51が張装されている。
【0033】
前記端部クランプ爪30の先端は押え部30aとされていて摩擦部片30bが貼着されており、図7の略直立姿勢から図8の水平姿勢の範囲にわたり前記連結部材44の回動でリンク機構36を介し起伏回動される。また長さの異なる印刷物Pに対応するためには、前記ホルダ35の位置をその印刷物Pに適合する位置に調整可能とすればよい。
【0034】
すなわち図7の開放状態からハンドル軸31を同図において反時計方向に回動すると、まず作動片39,39と連結部材44とが共に図7において反時計方向に回動し、これに伴って第2リンク47が引張られるのでその長孔47aの端部で第1リンク46のピン48が引かれ、これにより第1リンク46は立ち上がって第3リンク50を介し端部クランプ爪30を倒伏させる方向に回動させ、その押え部30aが印刷物Pの上面を対向するクランプ爪30cの方向に押える。
【0035】
この時点に至ると作動片39,39が遊動凹部41,41内を移動し終り、その一方の内側面(図7において41a,41aで示す面)に当接してこれを押すことによりカム体40および押圧カム43が共に図7において反時計方向に回動し、押圧カム43の高所42,42が固定壁37とホルダ35の壁部38との間に割り込み、その高所42,42によりホルダ35を押して軸34を中心に旋回させることになる。なおクランプ爪30cもホルダ35に詳細は図示しないが連結されているのでこの旋回により端部クランプ爪30の押え部30aおよびクランプ爪30cが印刷物Pの挿入方向後端両隅を図2(A)の矢印方向へ引張ることになり、これにより印刷物P全体のしわが延ばされる。
【0036】
ハンドル32を元に戻せば前記とは逆の作動により端部クランプ爪30は直立姿勢に戻り、印刷物Pの押圧が解放される。
【0037】
磁気検出用ヘッドユニット6は、前記のように図示しない既知のロボット構造と同様にサーボモータ駆動によるX軸、Y軸によって任意所望の位置を走査可能とされるもので、その下端には図10、図11に示すように紙幣の印刷物Pの場合、図16に示した行間の余白部(C),(C)…の間隔に一致する間隔をおきかつ、その余白部(C)の幅より小さい幅(約4mm)を有する片側3個(中央のローラは磁気検出用ヘッド55の真横に位置する)ずつの左右のローラ52,52を備え、これらローラ52,52を軸支する部材53,53間に横設された軸54にそって磁気検出用ヘッド55が移動可能とされ、磁気検出用ヘッド55の上部には測距用のレーザ光ユニット56が設けられており、これら磁気検出用ヘッド55およびレーザ光ユニット56は磁気検出用ヘッドユニット6に取付ボルト57を介して取付けられている。さらにこれら磁気検出用ヘッド55およびレーザ光ユニット56は図示しない取付ネジによりローラ52に対し上下位置(実施例では150μ)調整可能に支持されている。
【0038】
磁気ヘッドユニット6は前記したZ軸用駆動モータとボールネジ機構およびクランク機構によって大判面に下降駆動される。ここにおいて、ローラ52、磁気ヘッド55、レーザ光ユニット56は一体となって、磁気ヘッドユニット6に対して上下方向に遊びを設けて取付けられている。したがって、磁気ヘッドユニット6が大判面に接地した際には、この遊びの作用によりローラ52が大判面に過度に押し付けられることがない。
【0039】
本実施の形態では、上記ローラ52、磁気ヘッド55、レーザ光ユニット56の自重により支える方式を採用したが、これに限定するものではない。例えばこれらローラ52、磁気ヘッド55、レーザ光ユニット56と磁気ヘッドユニット6との間にバネ等の緩衝部材を介して支持するようにしても良い。
【0040】
前記磁気検出用ヘッド55は距離計測(レーザ計測)型のACヘッドが用いられ、その下面55aは被検出物と平行な平坦面とされており、図12(A)に示すように中央部付近にはコア58およびレーザ発光窓59aおよび受光窓59bが、その両側で磁気検出用ヘッド55の走査方向(図12(A)の矢印方向)に対し直交する方向に片側3個ずつ計6個のエア噴出口60,60…が前記コア58を囲むように列設されている。これらエア噴出口60,60…は装置本体1に備えられた図示しない圧縮エア供給源に接続されている。
【0041】
前記レーザ発光窓59aから出光したレーザ光は紙面で反射した後に受光窓59bを通じてセンサに受光され、磁気検出用ヘッド55の下面55aと印刷物Pの上面との間隙(150μ)を計測するようにされている。
【0042】
次に上記実施形態の動作および制御内容について説明する。
【0043】
操作の概要としては、先ず装置の電源を投入し、操作パネル61の表示画面上で図13に例示するように検査対象となる印刷物の種類、検査モード、管理コード、検査日付、工場名等、必要な事項を設定する。
【0044】
次いでシャッタ4,5を開け、露出した台盤2上に印刷物Pをその手元端縁を位置決めピン9,9に当接させて所定の位置に位置決めしつつ左端縁を挿入基準先端側クランプ機構7の基準位置に載置する。このとき左右の位置決めピン9,9に印刷物Pの手元端が正しく当接していないときは位置確認センサがそれを検知して操作パネル61の「エッジ」の表示欄(図13)に「×」印が表示され、セットのし直しをうながす。次に挿入基準先端側のクランプ機構7のハンドル14を半回動すれば、前述の作用により印刷物Pの挿入基準先端縁の中央部が各クランプ爪10によりクランプされ、次に挿入基準後端側のクランプ機構8のハンドル32を回動すれば、前述の作用により印刷物Pの挿入基準後端縁の上下の余白の端部がクランプ爪30,30でクランプされるとともに旋回動して全体のしわ延ばしがなされ、その後、前記ハンドル14の残りの半回動で挿入基準先端縁の両側部、隅部のクランプ爪11,12のクランプと旋回動とにより印刷物Pは台盤2に密着して完全な平坦状となってセットされる。正しくセットしたのちシャッタ4,5を閉じる。このシャッタの閉止が不完全である場合には操作パネル61の「安全」の表示欄に「×」印が表示され、閉じなおしをうながす。
【0045】
シャッタ4,5が確実に閉じられたことを確認したのちスタートボタンを押すことにより前記位置決めピン9,9は台盤2より退没して走査が開始される。
【0046】
スタート時点においては、磁気検出用ヘッドユニット6は図1の位置、図14(A),(B)において待機位置▲1▼におかれており、スタート指令により補正位置▲2▼まで進む。この補正位置▲2▼では、図14(C)に示すように基準となる所定の磁気特性を備えた方形の基準マーカ62がバネ63,63等により4隅を弾性的に支持されており、このマーカ62の上面に磁気検出用ヘッド55の下面を当接させて密着したときの磁気強度、距離(ゼロ)値を測定し、この測定値に基づいて磁気センサ、距離センサが校正されるようになっている。
【0047】
次いでマーク確認位置▲3▼へ移行し、印刷物Pの例えば用紙端縁部、上端中央部、左端中央部、左端上端部等にある見出しマーク位置を確認し、用紙の種類と併せて検索位置を補正する。この補正が終了すると検索開始位置▲4▼−1へ移行する。このとき磁気検出用ヘッドユニット6は印刷物Pの上面に下降し、そのローラ52,52が印刷物Pの余白部(C),(C)上に接地し、磁気検出用ヘッド55の下面55aは印刷物Pの上面に対し150μの間隙をおいて印刷済のインキ面に接することなく離間した状態におかれる。なお、上記マークの確認でマークが所定の位置になかった場合、またはマーク形状の異常が検知された場合は、操作パネル61にその旨を表示して計測動作を中断する。
【0048】
こうして走査が開始され、検索終了位置▲5▼−1へ移行する間に所定箇所のインキの磁気特性の検出がなされる。複数箇所にわたって検索する場合は、▲4▼−2→▲5▼−2、▲4▼−n→▲5▼−nのように走査される。
【0049】
そして上記走査時の移行中は、磁気検出用ヘッド55の下面55aのエア噴出口60,60…から圧縮エア(例えば2kgf/cm2 )が印刷物Pに向けて噴出され、検索箇所の紙の浮き上がりが抑えられ、前記間隙が保たれた状態で走査される。また磁気検出用ヘッド55が印刷物Pの端部に至ったときは、図10(B)に示すように磁気検出用ヘッド55の真横に位置する中央のローラ52が印刷物Pの上面に乗っているので、該ヘッド55の下面と印刷物Pの上面との間の間隙に変動をきたすことがなく、検出誤差を生じることがない。
【0050】
磁気検出用ヘッド55による磁気特性の検出データは、図15に例示するように画面上に印刷物Pの検索対象箇所の磁気特性値の基準曲線e,fが予め表示され、上記検索による磁気特性を示す曲線gが順次書き込まれ、その曲線gが前記基準曲線e,fの範囲内にあるか否かをみることで良否とその状況が詳細に把握される。
【0051】
また前述の通り距離値を併せて測定するため、印刷物の表面に異物の付着があった場合等にもこの測定が容易であり、上記間隙に変動があっても距離の増減値で磁気の特性値の多少を別途設定された補正演算を行なって検索することを可能としている。
【0052】
なお上記実施形態では紙幣の大判印刷物を対象とした場合について説明したが、他の一定の品質を保持する必要のある印刷物、例えば国債、切手等の特殊インキを用いて印刷される証券類に対しても適用し得ることはもちろんであり、また具体的な構成は一例を示したもので、これに限定されるものではない。
【0053】
【発明の効果】
以上説明したように本発明によれば、印刷直後の印刷物であってもインキに含まれる磁気特性値を正確に検出することができるのでインキが乾燥するまで待たずにすみ、これにより印刷物の特性確認が容易となり、不適正な印刷物の発生を激減することができる。
【0054】
請求項4のクランプ機構を用いることにより対象印刷物が紙幣等の大判印刷物であってもしわや波打ちを生じることなく台盤上にセットすることができるので、磁気検出用ヘッドを浮上させて非接触で磁気の検出を行なっても磁気検出用ヘッドと対象物との間の間隙を正確に保つことができ、磁気の検出精度を高めることができるとともに未乾燥のインキに触れて汚してしまうことがない。またクランプ爪は印刷物の端縁の複数箇所を分割的に押えるようにしているので、これらクランプ爪のない位置で磁気検出用ヘッドの走査を行えばクランプ爪が検索の障害になることがない。
【0055】
また請求項5のようにローラと磁気検出用ヘッドとを組合わせた構成とすれば、磁気検出用ヘッドと対象印刷物との間のクリアランスの調整が容易であるとともに正確に調整することができる。この場合、請求項6のように左右一対のローラを磁気検出用ヘッドの真横に位置させることにより印刷物の端部まで磁気検出用ヘッドが走査しても該ヘッドのヘッド面と印刷物の表面との間の間隙に変動をきたすことがなく、検出精度を低下させることが防がれる。
【0056】
さらに請求項7のように磁気検出用ヘッドの下面を平坦面とするとともにエア噴出口を列設し、これら噴出口から圧縮エアを噴出させながら走査するようにすれば、対象印刷物の測定箇所の浮上が抑えられ、前記クラアランスを一層高精度に維持して磁気の検出を行なうことができ、検出精度を一層高めることができる。
【図面の簡単な説明】
【図1】本発明を紙幣の大判印刷物検査用とした場合の一実施形態を示す外観斜視図。
【図2】印刷物のクランプ部を示すもので、(A)はクランプ位置を示す平面図、(B)は側面図。
【図3】印刷物の挿入方向先端側のクランプ機構を示し、(A)はハンドル軸の回転位置を、(B)は中央クランプ爪を、(C)はサイドクランプ爪を、(D)は端部クランプ爪をそれぞれ示す説明図。
【図4】(A)〜(D)は図3(A)〜(D)の動作過程を示す説明図。
【図5】(A)〜(C)は図4(A)〜(C)の動作終了時(クランプ時)を示す説明図。
【図6】図3(D)の端部クランプ爪の下面図。
【図7】印刷物の挿入方向後端部のクランプ機構の開放状態を示す一部を断面とした側面図。
【図8】同、クランプ状態を示す側面図。
【図9】同、平面図。
【図10】(A)は磁気検出用ヘッドユニットの一部を示す側面図、(B)は該ヘッドユニットが印刷物の端部に至った際の状態を示す説明図。
【図11】同、正面図。
【図12】磁気検出用ヘッドを示し、(A)は下面図、(B)は作用を示す側面図。
【図13】表示パネルの設定内容例を示す説明図。
【図14】磁気検出用ヘッドユニットの移動経路を示し、(A)は平面視、(B)は側面視の説明図、(C)はマーク確認手段の説明図。
【図15】磁気特性検出データの表示例を示す説明図。
【図16】紙幣の大判印刷物を示す平面視の説明図。
【符号の説明】
1 装置本体
2 台盤
4,5 シャッタ
6 磁気検出用ヘッドユット
7 先端側クランプ機構
8 後端側クランプ機構
9 位置決めピン
10 中央クランプ爪
11 サイドクランプ爪
12 端部クランプ爪
13,31 ハンドル軸
30 クランプ爪
35 ホルダ
36 リンク機構
40 カム体
43 押圧カム
44 連結部材
52 ローラ
55 磁気検出用ヘッド
60 エア噴出口
62 マーカ
P 印刷物(大判印刷物)
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printed matter inspection method and apparatus for providing a certain quality such as bills, securities printed using special inks such as government bonds and stamps.
[0002]
[Prior art]
For example, in the case of banknotes, normally as shown in FIG. 16, a single banknote a simultaneously prints (large-format printing) on a sheet b for a total of 20 sheets in 4 rows and 5 rows, waits for the ink to dry after printing, and the margin ( C), (C)... Are made into banknotes by cutting.
[0003]
In the conventional circulation banknote, authenticity discrimination is performed by detecting a magnetic property of ink at a predetermined position of the banknote by bringing a magnetic detection head into contact with the printing surface of the banknote as the magnetic detection means.
[0004]
[Means for Solving the Problems]
Thus, in banknote printing, the composition of the printing ink is determined in advance and large-format printing is performed by a rotary printing machine. The check of whether or not the ink of the large-sized banknote has appropriate magnetic characteristics is performed by conventional magnetic printing. In order to carry out using the detection head, it is not possible to execute until the ink is completely dried, so that the waiting time becomes longer.
[0005]
An object of the present invention is to provide a printed matter inspection method and apparatus capable of accurately detecting the magnetic characteristics of ink even when the ink immediately after printing is in an undried state.
[0006]
In order to solve the above-mentioned problems, the present invention places a printed matter immediately after printing on a base plate, and sets a magnetic detection head on the printed surface of the printed matter. Constant non-contact micro By scanning in a non-contact manner while maintaining a gap, the magnetic properties possessed by the ink are accurately detected and inspected even when the ink is in an undried state.
[0007]
As described above, when the magnetic detection head is scanned in a non-contact manner on the printed surface of the printed matter, the magnetic property of the ink is detected. Variations occur in the gaps, and the detection accuracy is extremely reduced. In particular, in the case of large-format printed matter of banknotes, since the area is large, partial undulations, wrinkles, etc. are likely to occur, and it is difficult to keep detection accuracy constant.
[0008]
For this reason, the present invention ensures that even when a large printed product is placed at a reference position on a platform having a flat surface and the printed product is clamped in an immobile state, the printed product is not wavy or wrinkled. Holding means for clamping the magnetic detection head, and holding the non-contact minute gap of the magnetic detection head that enables the magnetic detection head to scan with a fixed gap with respect to the printing surface of the printed matter. It is an object of the present invention to provide an inspection apparatus provided with a printed matter lifting prevention means that can ensure the flatness of a detected portion of a printed matter by a separation support means and a magnetic detection head.
[0009]
That is, the ink is not dried immediately after printing. Large-format prints that have a flat top surface and are made of non-magnetic material Place on base And the process , Magnetic detection head For printed surface of printed matter While maintaining a constant non-contact minute gap, Scan across the detected magnetic properties of printed matter Make Magnetic properties of ink Curve showing Detect And a process A printed matter inspection method characterized by the above is defined as claim 1.
[0010]
According to a second aspect of the present invention, in the inspection method, the printed matter has a joint surface that is in the vicinity of the property detection unit of the printed matter and has a predetermined magnetic property that serves as a reference and that can come into contact with the magnetic measurement surface of the magnetic detection head. Using a reference marker that is freely movable back and forth in a direction in which the bonding surface can be in close contact with the measurement surface of the head, The magnetic detection head includes a distance sensor for measuring a distance between the magnetic measurement surface and the bonding surface, and the magnetic measurement surface of the magnetic detection head and the bonding surface of the reference marker are brought into close contact with each other so that the distance value is zero. Calibrating the magnetic detection head by measuring the magnetic characteristic value of the reference marker of Magnetic properties of printed materials Curve showing Is to be detected.
[0011]
Further, the present invention provides the magnetic detection head. However, the distance from the printed matter is measured by the distance sensor, and the detected curve indicating the magnetic characteristic is corrected based on the distance from the printed matter measured by the distance sensor. .
[0012]
According to a fourth aspect of the present invention, there is provided a table having a flat upper surface on which large-sized printed material is placed, left and right clamping mechanisms disposed on both sides of the table, and magnetism of the printed material placed on the table. And a magnetic detection head that is provided on the printing surface of the printed material so as to be movable in a non-contact manner so as to scan the characteristic detection location. A clamping mechanism that has a clamping claw that clamps the center of the insertion reference leading edge of the printed matter first, and a clamping claw that clamps both sides of the insertion reference leading edge later than that, and is positioned on the insertion reference trailing end of the printed matter Has clamping claws for clamping both sides of the trailing edge of the insertion reference of the printed matter, and the clamping claws can be pivoted so as to pull both sides of the trailing reference end of the printed matter obliquely outward after clamping. Tip side Clamp nail insertion reference rear side after the clamp jaws have clamped the central pivots and clamps, then clamping nail insertion reference distal end sides is in the printed matter inspection device is characterized in that so as to clamp.
[0013]
A fifth aspect of the present invention provides a base having a flat upper surface on which large-sized printed material is placed, left and right clamping mechanisms disposed on both sides of the base, and ink of the printed material placed on the base. A magnetic detection head for detecting the magnetic characteristics of the magnetic detection head, and the magnetic detection head is between the left and right rollers that are pivotally supported at a predetermined interval so as to be able to roll in contact with the blank portion of the printed matter. The shaft is supported so that the position of the shaft can be adjusted in the axial direction and the vertical direction of the shaft, and the head surface of the magnetic detection head is supported to be spaced apart from the printing surface with a predetermined gap with respect to the roller. According to a sixth aspect of the present invention, there are a plurality of pairs of left and right rollers, and the pair of left and right rollers is positioned directly beside the magnetic detection head. Furthermore, claim 7 A flat plate having a flat upper surface and made of a non-magnetic material, on which a large-sized printed material that has not been dried in ink immediately after printing is placed, and a fixed non-contact minute amount with respect to the printing surface of the large-sized printed material that has not been dried in ink. A magnetic detection head that detects a curve indicating the magnetic properties of the ink by scanning over the magnetic property detection locations of the large-format print while maintaining a gap, and the magnetic detection head has a lower surface thereof. A plurality of air jets are provided on the head surface, and compressed air from an air supply source is jetted onto the upper surface of the detection area of the large-format printed matter when detecting magnetic characteristics to obtain flatness of the detection print surface. It is a printed matter inspection apparatus characterized by being. in this way, A plurality of air jets are provided on the head surface of the lower surface of the magnetic detection head, and compressed air from the air supply source is jetted onto the upper surface of the detected position of the printed matter when detecting magnetic properties so as to obtain the flatness of the printing surface. Because The base plate on which the target printed material is placed is not necessarily flat and can be applied even when it is a cylindrical surface.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
[0015]
FIG. 1 shows an embodiment in which the present invention is an apparatus for inspecting the magnetic properties of ink of a large-sized printed material in a banknote printing process. The apparatus main body 1 is manually handed to a large-sized printed material (hereinafter simply referred to as a printed material). A base plate 2 made of a non-magnetic material such as glass having a thickness of about 30 mm with a flat top surface and a size on which a printed material can be placed in a flat shape is fixed horizontally. The left and right sides of the installation location of the panel 2 are covered with side plates 3 and 3, and the shutter 4 for opening and closing the upper surface range along the side plates 3 and 3 and the shutter 5 for opening and closing the front range are both slid and It is provided in an openable and closable manner.
[0016]
The magnetic detection head unit 6 can move in the vertical and horizontal directions and up and down (Z axis) directions along the X and Y axes (not shown) in the X and Y planes on the upper surface of the base plate 2 in the same manner as a normal robot. The movement in each direction is performed by an X-axis servo motor, a Y-axis servo motor, a Z-axis drive motor, a ball screw mechanism, and a crank mechanism.
[0017]
The left end position of the base plate 2 is a reference position where the front end in the insertion direction abuts when the printed product P is inserted and placed on the base plate 2 from the right to the left, and there are a plurality of leading edges of the printed product P. The clamp mechanism 7 on the front end side that clamps at a location is also provided on the rear end side in the insertion direction and is provided with a rear end side clamp mechanism 8 that clamps both sides of the rear end edge of the printed matter P. A pair of positioning pins 9 and 9 for contacting and positioning the proximal edge of the printed matter P are provided on the left and right in the vicinity of the central position on the front side so as to be movable upward and downward, and whether or not the printed matter P is correctly placed. A position confirmation sensor (not shown) for detection is provided.
[0018]
FIG. 2 (A) shows the positional relationship of the clamp claws of the clamp mechanisms 7 and 8 on the tip reference side and the rear end side, and FIG. 2 (B) shows a view seen from the side surface. The central clamp claw 10 located at the center of the leading edge of the printed material P in the insertion direction, the two side clamp claws 11 and 11 located on both sides of the clamp claw 10, and the outer corners thereof. The clamp claws 10, 11, and 12 have end clamp claws 12, 12, and the clamp claws 10, 11, 12 are provided with a handle 14 at the proximal end of the handle shaft 13 disposed along the insertion reference front end edge of the printed matter P (FIG. Are operated at predetermined timings, respectively, with the center and side clamp claws 10 and 11 moving up and down, and the end clamp claws 12 moving up and down and turning. It has become
[0019]
3A to 5A show the rotational position of the handle 14 of the handle shaft 13, FIG. 3B shows the operation state of the central clamp claw 10, and FIG. Since the end clamp claw 12 is swung as described above, FIG. 3 (D) shows a front view and FIG. 6 shows a plan view.
[0020]
The central clamp claw 10 and the side clamp claw 11 have substantially the same structure, and are arranged on the upper end of the vertical bases 10a and 11a supported on the apparatus main body 1 side so as to be movable up and down on the leading edge Pa side in the insertion direction of the printed matter P. The facing pressing parts 10b and 11b are bent at a right angle, and friction parts 10c and 11c such as a rubber material are attached to the lower surface thereof.
[0021]
Downward contact portions 10d and 11d are formed on the base portions 10a and 11a, and rollers 17 and 18 (bearings) at the tips of the arms 15 and 16 fixed to the handle shaft 13 on the contact portions 10d and 11d. The clamp claws 10, 11 are configured to descend by their own weight as the handle shaft 13 rotates clockwise in FIG. 3.
[0022]
The lower ends of the base portions 10a and 11a of the clamp claws 10 and 11 are provided with elastic plates 19 and 20 made of a leaf spring or the like extending to the side opposite to the side on which the insertion reference tip edge of the printed matter P hits, When the arms 15 and 16 are rotated, the rollers 17 and 18 move to the upper surfaces of the elastic plates 19 and 20, and the lower surfaces of the pressing portions 10b and 11b are pressed against the printed matter P by elastically pressing them down. ing.
[0023]
The abutting portions 10d and 11d are provided at a position where the abutting portion 11d of the side clamp claw 11 is slightly higher than the abutting portion 10d of the central clamping claw 10, and the central clamping claw 10 is shown in FIG. ) So as to come into contact with the upper surface of the printing part P first. The elastic plate 19 of the central clamp claw 10 is long and curved upward to allow the arm 15 to rotate after the presser portion 10b comes into contact with the printed matter P, and the roller 17 of the arm 15 causes the elastic plate 19 to move. It is made to keep pushing.
[0024]
The end clamp claw 12 is supported on the apparatus main body 1 side by a vertical axis 21 so as to be movable up and down and turned, and has one end as a presser 12a and a friction piece 12b attached to the lower surface. The roller 24 of the arm 23 of the handle shaft 13 provided in parallel with the leading edge of the insertion direction of P is in contact with the lower surface of the end clamp claw 12 opposite to the pressing portion 12a under the bias of the spring 25. As the handle shaft 13 rotates, the handle shaft 13 is lowered at the same timing as the central clamp claw 10.
[0025]
Further, a cam 27 having a part of the peripheral surface cut out is fixed to the handle shaft 13, and a roller 28 (bearing) that is pivotally attached to the lower surface of the end clamp claw 12 on the peripheral surface of the cam 27. The roller 28 is brought into contact with the lower portion 27 a of the cam 27 when the center clamp claw 10 and the presser portions 12 a of the end clamp claws 12 and 12 press the upper surface of the printed matter P. The end clamping claw 12 is depressed and pivoted about the shaft 21 in the directions indicated by the arrows in FIGS. 2A and 6, whereby the center of the printed material P held by the central clamping claw 10 is inserted. Both ends are pulled in the direction indicated by the arrow (a) in FIG. 2 (A), and the wrinkle is extended.
[0026]
If the handle 14 is returned to the original position, the clamp claws 10, 11, and 12 return upward and the press of the printed matter P is released.
[0027]
The clamping mechanism 8 on the rear end side has clamp claws 30 and 30 positioned in the upper and lower margins of the insertion reference rear edge of the printed matter P as shown in FIG. Shows one side.
[0028]
The handle shaft 31 of the clamp mechanism 8 is disposed in a direction parallel to the rear end edge, and a handle 32 at the proximal end is rotated in the direction of the arrow in FIG. (The details are not shown), and the presser portion 30a of the clamp claw 30 and the clamp claw 30c opposite thereto are in contact with the upper and lower end positions of the insertion reference rear end edge of the printed matter P. 2A, after turning and holding, it moves in the direction indicated by the arrow in FIG. 2A to extend both corners of the rear end of the printed material P in the direction indicated by the arrow (b) in FIG. Yes. The lower surface of the holding part 30a of the clamp claw 30 and the upper surface of the clamp claw 30c come into contact with the printed matter P with a required friction, and after the printed matter P is fully extended during the turning movement, it slides. .
[0029]
That is, the clamp claws 30 and 30c on the rear end side have a substantially rectangular shape in a plan view as shown in FIG. 9, and the clamp claws 30 are pivotally supported on the apparatus main body 1 side by a shaft 34 so as to be rotatable in a horizontal plane. The holder 35 and a clamp claw 30c connected to the holder 35 are turned around the shaft 34 by the rotation of the handle shaft 31. ing.
[0030]
In the turning mechanism, a handle shaft 31 is positioned between a fixed wall 37 fixed on the apparatus main body 1 side and a wall portion 38 rising on one side of the holder 35, and operates in the diameter direction of the handle shaft 31. The pieces 39, 39 are fixed, and the operating pieces 39, 39 are located in the floating recesses 41, 41 cut out in a sector shape at a target position on the diameter line of the cam body 40 provided coaxially with the handle shaft 31. Has been.
[0031]
Separately from the cam body 40, the handle shaft 31 is fixed with a pressing cam 43 having heights 42, 42 in the diametrical target position with the heights 42, 42 and the floating recesses 41, 41 in phase. Separately, a connecting member 44 for connecting the link mechanism 36 is fixed to the handle shaft 31.
[0032]
7 and 8, the link mechanism 36 includes a first link 46 having one end pivotally supported by a bearing 45 of the holder 35 and one end pivotally supported by the connecting member 44. A second link 47 in which a long hole 47a is loosely fitted to a pin 48 provided at an intermediate position of the first link 46, and an end clamp claw whose proximal end is pivotally supported on the holder 35 side by a shaft 49 30 and a third link 50 that connects the other end of the first link 46, and a tension spring 51 is stretched between the connecting member 44 and the first link 46. ing.
[0033]
The tip of the end clamp claw 30 is a presser 30a, and a friction piece 30b is attached, and the connecting member 44 is rotated over the range from the substantially upright posture of FIG. 7 to the horizontal posture of FIG. The undulation is rotated through the link mechanism 36. Further, in order to correspond to the printed material P having different lengths, the position of the holder 35 may be adjusted to a position suitable for the printed material P.
[0034]
That is, when the handle shaft 31 is rotated counterclockwise in FIG. 7 from the open state of FIG. 7, first, the operating pieces 39 and 39 and the connecting member 44 are both rotated counterclockwise in FIG. Since the second link 47 is pulled, the pin 48 of the first link 46 is pulled at the end of the long hole 47 a, whereby the first link 46 rises and the end clamp pawl 30 is laid down via the third link 50. The pressing part 30a presses the upper surface of the printed matter P in the direction of the opposing clamping claw 30c.
[0035]
When reaching this point, the operating pieces 39, 39 finish moving in the floating recesses 41, 41 and come into contact with one inner side surface (the surface indicated by 41a, 41a in FIG. 7) to push the cam body 40. 7 and both of the pressing cams 43 are rotated counterclockwise in FIG. 7, and the heights 42 and 42 of the pressing cam 43 are interrupted between the fixed wall 37 and the wall portion 38 of the holder 35. The holder 35 is pushed and turned around the shaft 34. Since the clamp claw 30c is also connected to the holder 35, although not shown in detail, the holding portion 30a of the end clamp claw 30 and the clamp claw 30c are positioned at the rear end corners in the insertion direction of the printed matter P by this turning. The wrinkle of the whole printed matter P is thereby extended.
[0036]
When the handle 32 is returned to the original position, the end clamp claw 30 returns to the upright posture by the reverse operation to the above, and the pressing of the printed matter P is released.
[0037]
The magnetic detection head unit 6 can scan an arbitrary desired position by the X-axis and Y-axis driven by a servo motor as in the known robot structure (not shown) as described above. As shown in FIG. 11, in the case of a printed matter P of banknotes, an interval that matches the interval between the margins (C), (C)... Shown in FIG. 16 is set, and the width of the margin (C). Three members each having a small width (about 4 mm) (the central roller is located directly beside the magnetic detection head 55) are provided on the left and right rollers 52, 52, and the members 53 that pivotally support these rollers 52, 52, A magnetic detection head 55 can be moved along a shaft 54 provided between 53, and a laser beam unit 56 for distance measurement is provided above the magnetic detection head 55. Head 55 and race Light unit 56 is mounted via a mounting bolt 57 to the magnetic detecting head unit 6. Further, the magnetic detection head 55 and the laser beam unit 56 are supported by a mounting screw (not shown) so that the vertical position (150 μm in the embodiment) can be adjusted with respect to the roller 52.
[0038]
The magnetic head unit 6 is driven down to a large surface by the Z-axis drive motor, the ball screw mechanism, and the crank mechanism. Here, the roller 52, the magnetic head 55, and the laser beam unit 56 are integrally attached to the magnetic head unit 6 with play in the vertical direction. Therefore, when the magnetic head unit 6 is grounded on the large surface, the roller 52 is not excessively pressed against the large surface by the play.
[0039]
In the present embodiment, a method of supporting by the own weight of the roller 52, the magnetic head 55, and the laser beam unit 56 is adopted, but the present invention is not limited to this. For example, the roller 52, the magnetic head 55, the laser beam unit 56, and the magnetic head unit 6 may be supported via a buffer member such as a spring.
[0040]
The magnetic detection head 55 is a distance measurement (laser measurement) type AC head, and its lower surface 55a is a flat surface parallel to the object to be detected, as shown in FIG. The core 58, the laser emission window 59a, and the light reception window 59b have a total of six on each side, three on one side in a direction orthogonal to the scanning direction of the magnetic detection head 55 (the arrow direction in FIG. 12A). .. Are arranged in a row so as to surround the core 58. These air outlets 60, 60... Are connected to a compressed air supply source (not shown) provided in the apparatus main body 1.
[0041]
The laser beam emitted from the laser emission window 59a is reflected on the paper surface and then received by the sensor through the light receiving window 59b, and the gap (150 μ) between the lower surface 55a of the magnetic detection head 55 and the upper surface of the printed matter P is measured. ing.
[0042]
Next, operations and control contents of the above embodiment will be described.
[0043]
As an outline of the operation, first, the apparatus is turned on, and as shown in FIG. 13 on the display screen of the operation panel 61, the type of printed matter to be inspected, inspection mode, management code, inspection date, factory name, etc. Set the necessary items.
[0044]
Next, the shutters 4 and 5 are opened, and the left edge is positioned at a predetermined position with the proximal edge of the printed matter P abutting against the positioning pins 9 and 9 on the exposed base plate 2, and the left edge is inserted into the insertion reference tip side clamping mechanism 7. Placed at the reference position. At this time, if the proximal end of the printed matter P is not correctly in contact with the left and right positioning pins 9, the position confirmation sensor detects this and “X” appears in the “EDGE” display field (FIG. 13) of the operation panel 61. A sign will appear, prompting you to re-set. Next, if the handle 14 of the clamp mechanism 7 on the insertion reference front end side is turned halfway, the center portion of the insertion reference front end edge of the printed matter P is clamped by the clamp claws 10 by the above-described action, and then the insertion reference rear end side. If the handle 32 of the clamping mechanism 8 is rotated, the upper and lower marginal ends of the insertion reference rear edge of the printed matter P are clamped by the clamp claws 30 and 30 and swiveled by the above-mentioned action, and the entire wrinkle is moved. After that, the printed matter P is brought into close contact with the base plate 2 by the clamping and swiveling movements of the clamp claws 11 and 12 at both sides and corners of the insertion reference leading edge by the remaining half rotation of the handle 14. Set in a flat shape. After setting correctly, the shutters 4 and 5 are closed. If the shutter is not completely closed, an “x” mark is displayed in the “safe” display field of the operation panel 61 to prompt the user to close the shutter again.
[0045]
After confirming that the shutters 4 and 5 are securely closed, by pressing the start button, the positioning pins 9 and 9 are retracted from the base plate 2 and scanning is started.
[0046]
At the start time, the magnetic detection head unit 6 is in the position shown in FIG. 1, and in the standby position (1) in FIGS. 14A and 14B, and advances to the correction position (2) in response to the start command. At this correction position {circle around (2)}, as shown in FIG. 14C, a rectangular reference marker 62 having a predetermined magnetic characteristic as a reference is elastically supported at four corners by springs 63, 63, etc. The magnetic strength and distance (zero) value when the lower surface of the magnetic detection head 55 is brought into contact with the upper surface of the marker 62 are measured, and the magnetic sensor and the distance sensor are calibrated based on the measured values. It has become.
[0047]
Next, the process proceeds to the mark confirmation position (3), where the heading mark positions in the printed material P, for example, at the paper edge, upper edge center, left edge center, left edge upper edge, etc., are confirmed. to correct. When this correction is completed, the process proceeds to the search start position (4) -1. At this time, the magnetic detection head unit 6 is lowered to the upper surface of the printed matter P, the rollers 52 and 52 are grounded on the margins (C) and (C) of the printed matter P, and the lower surface 55a of the magnetic detection head 55 is the printed matter. It is placed in a state of being spaced apart from the upper surface of P without contacting the printed ink surface with a gap of 150 μm. If the mark is not in a predetermined position in the confirmation of the mark, or if an abnormality in the mark shape is detected, the fact is displayed on the operation panel 61 and the measurement operation is interrupted.
[0048]
Scanning is thus started, and the magnetic characteristics of the ink at a predetermined location are detected while moving to the search end position (5) -1. When searching over a plurality of locations, scanning is performed in the order of (4) -2 → (5) -2, (4) -n → (5) -n.
[0049]
During the scanning, the compressed air (for example, 2 kgf / cm) is supplied from the air jets 60, 60... On the lower surface 55a of the magnetic detection head 55. 2 ) Is ejected toward the printed matter P, and the paper at the search location is prevented from being lifted, and scanning is performed while the gap is maintained. When the magnetic detection head 55 reaches the end of the printed matter P, the central roller 52 located right next to the magnetic detection head 55 is on the upper surface of the printed matter P as shown in FIG. Therefore, there is no variation in the gap between the lower surface of the head 55 and the upper surface of the printed material P, and no detection error occurs.
[0050]
As shown in FIG. 15, the detection data of the magnetic characteristics by the magnetic detection head 55 is displayed in advance on the screen as the reference curves e and f of the magnetic characteristic value of the search target portion of the printed matter P. The curves g shown are sequentially written, and whether or not the curves g are within the range of the reference curves e and f can be grasped in detail.
[0051]
In addition, since the distance value is also measured as described above, this measurement is easy even when foreign matter adheres to the surface of the printed matter. It is possible to search by performing a correction calculation set separately for some of the values.
[0052]
In the above-mentioned embodiment, the case where the large-sized printed matter of the banknote is described has been described. However, for other printed matter that needs to maintain a certain quality, such as securities printed using special inks such as government bonds and stamps. Of course, the present invention can be applied, and the specific configuration is an example, and the present invention is not limited to this.
[0053]
【The invention's effect】
As described above, according to the present invention, it is possible to accurately detect the magnetic property value contained in the ink even if it is a printed material immediately after printing, so that it is not necessary to wait until the ink is dried. Confirmation becomes easy and generation of improper printed matter can be drastically reduced.
[0054]
By using the clamp mechanism of claim 4, even if the target printed matter is a large-sized printed matter such as a banknote, it can be set on the base plate without causing wrinkles or undulations. Even if the magnetic detection is performed, the gap between the magnetic detection head and the object can be accurately maintained, the magnetic detection accuracy can be improved, and the ink may be soiled by contact with the undried ink. Absent. Further, since the clamp claw is configured to press a plurality of portions of the edge of the printed material in a divided manner, if the magnetic detection head is scanned at a position where there is no clamp claw, the clamp claw does not hinder search.
[0055]
Further, when the roller and the magnetic detection head are combined as in the fifth aspect, the clearance between the magnetic detection head and the target printed matter can be easily adjusted and adjusted accurately. In this case, even if the magnetic detection head scans the edge of the printed matter by positioning the pair of left and right rollers just beside the magnetic detection head as in claim 6, the head surface of the head and the surface of the printed matter It is possible to prevent the detection accuracy from being lowered without causing a change in the gap between them.
[0056]
Furthermore, if the lower surface of the magnetic detection head is made flat as in claim 7 and air jets are arranged in a row and scanning is performed while compressed air is jetted from these jets, the measurement location of the target printed matter can be measured. The flying height is suppressed, the clearance can be maintained with higher accuracy, and the magnetic detection can be performed, and the detection accuracy can be further improved.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing an embodiment when the present invention is used for inspecting large-sized printed matter of banknotes.
FIGS. 2A and 2B show a clamp part of a printed material, in which FIG. 2A is a plan view showing a clamp position, and FIG. 2B is a side view;
FIGS. 3A and 3B show a clamp mechanism at the leading end side in the insertion direction of a printed material, where FIG. 3A shows the rotational position of the handle shaft, FIG. 3B shows the center clamp claw, FIG. 3C shows the side clamp claw, and FIG. Explanatory drawing which shows a part clamp nail | claw, respectively.
FIGS. 4A to 4D are explanatory views showing an operation process of FIGS. 3A to 3D. FIGS.
FIGS. 5A to 5C are explanatory views showing the time when the operation of FIGS. 4A to 4C is completed (clamping).
6 is a bottom view of the end clamp claw of FIG. 3 (D). FIG.
FIG. 7 is a side view, partly in cross section, showing an open state of a clamp mechanism at the rear end of the printed material in the insertion direction.
FIG. 8 is a side view showing the clamped state.
FIG. 9 is a plan view of the same.
10A is a side view showing a part of a magnetic detection head unit, and FIG. 10B is an explanatory view showing a state when the head unit reaches an end of a printed matter.
FIG. 11 is a front view of the same.
FIG. 12 shows a magnetic detection head, (A) is a bottom view, and (B) is a side view showing the operation.
FIG. 13 is an explanatory diagram illustrating an example of setting contents of a display panel.
14A and 14B show movement paths of the magnetic detection head unit, where FIG. 14A is a plan view, FIG. 14B is a side view, and FIG.
FIG. 15 is an explanatory view showing a display example of magnetic characteristic detection data.
FIG. 16 is an explanatory view in plan view showing a large-sized printed matter of banknotes.
[Explanation of symbols]
1 Main unit
2 base
4,5 Shutter
6 Magnetic detection head unit
7 Tip side clamping mechanism
8 Rear end side clamping mechanism
9 Positioning pin
10 Center clamp claw
11 Side clamp claw
12 End clamp claws
13, 31 Handle shaft
30 Clamp claw
35 Holder
36 Link mechanism
40 cam body
43 Pressing cam
44 Connecting member
52 Laura
55 Magnetic detection head
60 Air outlet
62 Marker
P printed matter (large format printed matter)

Claims (7)

印刷直後でインキが未乾燥の大判印刷物を、平坦な上面を有するとともに非磁性体からなる台盤上に載置する工程と
磁気検出用ヘッドを、インキが未乾燥の前記大判印刷物の印刷面に対して一定の非接触微小間隙を保持しつつ、該大判印刷物の磁気特性検出箇所にわたって走査させることによりインキが保有する磁気特性を示す曲線を検出する工程と、
を備えたことを特徴とする印刷物検査方法。
A step of placing ink large format prints undried, a trapezoidal surface plate made of a nonmagnetic material and having a flat upper surface immediately after printing,
The magnetic detection head, the while maintaining the constant of the non-contact small gap with respect to the printing surface of the large-format prints undried ink, magnetic properties ink's by causing scan over the magnetic characteristic detecting portion of the large-size printed matter a step of detecting a curve showing,
Printed matter inspection method characterized by comprising a.
印刷物の特性検出部の近傍にあって、基準となる所定の磁気特性を備えるとともに磁気検出用ヘッドの磁気測定面と面接し得る接合面を有しかつ当該接合面が前記ヘッドの測定面に密接し得る方向に進退自在とされた基準マーカを用い、前記磁気検出ヘッドは、前記磁気測定面に前記接合面との距離を計測する距離センサを備え、前記磁気検出用ヘッドの磁気測定面と前記基準マーカの接合面とを密着させて距離値ゼロでの前記基準マーカの磁気特性値を測定することにより前記磁気検出用ヘッドを校正し、前記印刷物の磁気特性を示す曲線を検出するようにした請求項1記載の印刷検査方法。Near the characteristic detector of the printed matter, it has a predetermined magnetic characteristic as a reference and has a bonding surface that can come into contact with the magnetic measurement surface of the magnetic detection head, and the bonding surface is in close contact with the measurement surface of the head The magnetic detection head includes a distance sensor that measures a distance from the bonding surface on the magnetic measurement surface, and the magnetic measurement surface of the magnetic detection head and the magnetic detection surface are used. The magnetic detection head is calibrated by measuring the magnetic property value of the reference marker at a distance value of zero by bringing the joint surface of the reference marker into close contact, and a curve indicating the magnetic property of the printed matter is detected. The printing inspection method according to claim 1. 前記磁気検出用ヘッドは、前記距離センサにより印刷物との距離を測定し、前記距離センサによって測定される印刷物との距離に基づき、検出された前記磁気特性を示す曲線を補正するようにした請求項2記載の印刷物検査方法。The magnetic detection head measures a distance from a printed matter by the distance sensor, and corrects a detected curve indicating the magnetic characteristic based on a distance from the printed matter measured by the distance sensor. 2. The printed matter inspection method according to 2. 大判の印刷物を載置する平坦な上面を有する台盤と、
この台盤の両側部に配設された左右のクランプ機構と、
前記台盤上に載置される印刷物の磁気特性検出箇所を走査するよう印刷物の印刷面に非接触で移動自在に設けられた磁気検出用ヘッドとを備え、
印刷物の台盤上への挿入セット時に挿入基準先端側に位置するクランプ機構は、印刷物の挿入基準先端縁中央部を最先にクランプするクランプ爪と、これより遅れて挿入基準先端縁両側部をクランプするクランプ爪とを有し、印刷物の挿入基準後端側に位置するクランプ機構は、印刷物の挿入基準後端縁両側部をクランプするクランプ爪を有し、このクランプ爪はクランプ後印刷物の挿入基準後端両側部を斜め外方へ向け引張るよう旋回自在としてなり、前記挿入基準先端側中央のクランプ爪がクランプしたのち挿入基準後端側のクランプ爪がクランプして旋回し、次いで挿入基準先端側両側部のクランプ爪がクランプするようにしたことを特徴とする印刷物検査装置。
A platform with a flat top surface for placing large-format prints;
Left and right clamping mechanisms disposed on both sides of the platform;
A magnetic detection head provided so as to be movable in a non-contact manner on a printing surface of the printed matter so as to scan a magnetic property detection portion of the printed matter placed on the base plate,
The clamp mechanism located on the insertion reference tip edge side when inserting and setting the printed material on the base plate is a clamp claw that clamps the center of the insertion reference leading edge of the printed material first, and both sides of the insertion reference leading edge later than this. The clamping mechanism located on the rear end side of the printed product insertion reference has a clamping claw for clamping both sides of the printed reference insertion rear end edge, and this clamping claw inserts the printed product after clamping. It turns freely so that both sides of the reference rear end are pulled obliquely outward. After the clamp pawl at the center of the insertion reference front end is clamped, the clamp pawl on the rear end of the insertion reference clamps and turns, and then the insertion reference front end A printed matter inspection apparatus characterized in that clamp claws on both side portions are clamped.
大判の印刷物を載置する平坦な上面を有する台盤と、
この台盤の両側部に配設された左右のクランプ機構と、
前記台盤上に載置される印刷物のインキが保有する磁気特性を検出する磁気検出用ヘッドとを備え、
前記磁気検出用ヘッドは、印刷物の余白部に接して転動し得るよう所定の間隔をおいて軸支される左右のローラ間の軸に該軸の軸方向および上下方向に位置調整可能に支持され、
前記ローラに対し前記磁気検出用ヘッドのヘッド面が印刷面から所定の間隙をおいて離間支持したことを特徴とする印刷物検査装置。
A platform with a flat top surface for placing large-format prints;
Left and right clamping mechanisms disposed on both sides of the platform;
A magnetic detection head for detecting a magnetic property possessed by ink of a printed matter placed on the base plate,
The magnetic detection head is supported on a shaft between left and right rollers that are pivotally supported at a predetermined interval so as to be able to roll in contact with a margin of the printed material so that the position of the shaft can be adjusted in the axial direction and the vertical direction of the shaft. And
A printed matter inspection apparatus, wherein the head surface of the magnetic detection head is supported with a predetermined gap from the printing surface with respect to the roller.
前記ローラは左右複数対とし、そのうちの左右一対のローラが前記磁気検出用ヘッドの真横に位置されている請求項5記載の印刷物検査装置。  6. The printed matter inspection apparatus according to claim 5, wherein the rollers have a plurality of left and right pairs, and the pair of left and right rollers are positioned directly beside the magnetic detection head. 平坦な上面を有するとともに、非磁性体からなり、印刷直後でインキが未乾燥の大判印刷物を載置する台盤と、
インキが未乾燥の前記大判印刷物の印刷面に対して一定の非接触微小間隙を保持しつつ 、該大判印刷物の磁気特性検出箇所にわたって走査することによりインキが保有する磁気特性を示す曲線を検出する磁気検出用ヘッドと、を備え、
前記磁気検出用ヘッドは、その下面のヘッド面に複数個のエア噴出口を有し、磁気特性検出時に前記大判印刷物の検出箇所上面にエア供給源からの圧縮エアを噴出して前記検出印刷面の平坦性を得るように構成されていることを特徴とする印刷物検査装置。
A base plate having a flat upper surface and made of a non-magnetic material, on which a large-sized printed material on which undried ink is placed immediately after printing is placed,
While maintaining a certain non-contact minute gap with respect to the printing surface of the large-size printed matter that has not been dried with ink, a curve indicating the magnetic properties possessed by the ink is detected by scanning over the magnetic property detection portion of the large-sized printed matter. A magnetic detection head,
The magnetic detection head has a plurality of air ejection openings on the head surface on the lower surface thereof, and jets compressed air from an air supply source onto the upper surface of the detection area of the large-format printed material when detecting magnetic characteristics. The printed matter inspection apparatus is configured to obtain flatness of the printed matter.
JP17828099A 1999-06-24 1999-06-24 Printed matter inspection method and apparatus Expired - Fee Related JP4228038B2 (en)

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JP5068797B2 (en) * 2009-09-30 2012-11-07 グローリー株式会社 Printed matter inspection method and printed matter inspection apparatus
JP2012084454A (en) 2010-10-14 2012-04-26 Koito Mfg Co Ltd Arc tube for discharge bulb
JP5868010B2 (en) * 2011-03-15 2016-02-24 グローリー株式会社 Printed matter inspection method, printed matter inspection apparatus, and printed matter inspection program
JP2012247265A (en) * 2011-05-26 2012-12-13 Glory Ltd Printed matter checking apparatus and printed matter checking method

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* Cited by examiner, † Cited by third party
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