JP3562765B2 - Book manuscript reading device - Google Patents

Description

【００７３】
で表される（ｂ）式のようになる。
【００７４】
次に、用紙の外表面（上下面）に沿って、この（ｂ）式で表されるＸ軸方向のｍａｘｗｅｌｌの応力ｆｘを面積分することによって、この用紙の物体力（吸着力）Ｎが求められる。
すなわち、この用紙の物体力（吸着力）Ｎは、
Ｎ＝∫ｓｆｘｄＳ
となる。
これにより、この用紙の摩擦係数をμとすると、この用紙の搬送力Ｆは、
Ｆ＝μＮ
の式で表される。
本実施例の具体的な構成としては、めくり搬送ベルト８として、厚さ７５μｍのＰＥＴフィルム（誘電体８ａ）に、厚さ１０μｍのアルミ蒸着層（導電層８ｂ）が形成された無端ベルトを使用し、これに形成される電荷パターンのピッチを２．４ｍｍとした。
すなわち、ブック原稿９２の読み取り速度を１２０ｍｍ／ｓ、交流周波数を５０Ｈｚ、印加電圧を±２ｋＶ_ｐ−ｐとした。
また、第２５図に印加電圧を±２ｋＶ_ｐ−ｐに一定としたときの搬送力のピッチ特性の実験値を、第２６図に印加電圧を±２ｋＶ_ｐ−ｐに一定としたときの吸着力のピッチ特性の実験値を、第２７図に電荷パターンのピッチを２．４ｍｍに一定としたときの搬送力の印加電圧特性の実験値を、第２８図に電荷パターンのピッチを２．４ｍｍに一定としたときの吸着力の印加電圧特性の実験値を示す。
【００７５】
これらの実験値から明らかなように、本実施例に使用される電荷パターンのピッチ、及び、印加電圧は、上述した値に限定されるものではなく、例えば、電磁パターンのピッチとしては、０．５ｍｍ〜１０ｍｍの範囲であれば良く、また、印加電圧としては、±１ｋｖ_ｐ−ｐ以上であれば良い。
また、本実施例では、除電用の高周波交流電圧として、２ｋＨｚの周波数と、±２ｋＶ_ｐ−ｐの印加電圧を使用しているが、これらの各値についても、その除電効果が得られる値であれば、どのような値であっても良い。
上述のように、本実施例におけるページめくり方式によれば、めくり搬送ベルト８に吸着させる用紙（ブック原稿９２）には、何等細工を施す必要が無いので、この用紙どうしが静電気により互いに引き合うことが無く、用紙端部の乱れ（不揃い）の発生による、ブック原稿９２のページめくりミスの発生を無くすことができる。
また、このページめくり方式によれば、その吸着力の発生している個所が、めくり搬送ベルト８の表面の近傍であるので、このめくり搬送ベルト８の表面に接触している用紙、すなわち、ブック原稿９２のページめくりが実行されるがわの最上位の原稿に対しては、充分に大きな搬送力、及び、吸着力が作用するが、この原稿の下位に位置する、２枚目以下の原稿に対しては、これらの搬送力、及び、吸着力が、ほとんど作用することが無い。
従って、このページめくり方式によれば、１枚だけのページめくりを確実に実行することができるので、この方式は、ブック原稿９２のページめくり方式として最適な方式となる。
【００７６】
次に、上述のように構成されたＭＦＤＳの動作について説明する。
第２９図はＭＦＤＳの電装ブロック図、第３０図はブック原稿読み取り時の動作モード遷移図、第３１図はシート原稿読み取り時の遷移図、及び、第３２図はＭＦＤＳの動作モードを示すフローチャートである。
先ず、第２９図に基づいて、ＭＦＤＳの制御手段について説明する。
第２９図において、メイン制御ボード３１０は、各ボード間のコマンド、及び、データを制御し、各負荷のＯＮ／ＯＦＦタイミングや、各センサ入力による異常処理、及び、エード切り換え等を行いＭＦＤＳ全体のコントロールをしている。
また、このメイン制御ボード３１０は、接続機器との通信を行うことにより、通信プロトコルを設定し、各接続機器に対して個別に対応できるように構成されている。
例えば、プリンタ３００がその出力装置として接続されている場合には、その画素密度、処理速度、両面プリントの可否、及び、裏面排紙の可否等をチェックし、その対応モード選択域を決定できるように構成されている。
さらに、このメイン制御ボード３１０は、各モードに対応して、外部機器へのインターフェースを２系統備えている。
【００７７】
本実施例のメイン制御ボード３１０では、各ボード間のコマンドをシリアル通信で行い、そのデータ・制御線から分離して、そのデータ出力中にもコマンド送受信を可能としている。
ここで、その汎用性を高める場合には、そのインターフェースとして、ＧＰＩＢ、セントロニクス、ＳＣＳＩ等の、どちらか一方、もしくは、両方を設定することにより、汎用プリンタや、パーソナルコンピュータを介して、そのディスプレイ表示や、光ディスク装置、ＨＤＤ、及び、ＦＤＤ等の記憶装置に対して、特別なインターフェースを使用すること無く、ストアすることができる。
【００７８】
一方、第２９図において、めくり搬送ベルト駆動制御ボード３１１は、めくり搬送ベルト駆動モータ６１の制御を行っている。
また、めくりユニット駆動制御ボード３１２は、めくりユニット駆動モータ６０の制御を行っている。
ここで、めくり搬送ベルト駆動モータ６１は、このめくり搬送ベルト駆動モータ６１に一体的に取付けられたエンコーダの発するエンコーダパルスのフィードバックによって、めくり搬送ベルト８の速度を検出し、その速度位置制御及び正逆転動作を行っている。
【００７９】
これに対し、めくりユニット駆動モータ６０は、めくりローラ２に取付けられているエンコーダ１５２の発するエンコーダパルスのフィードバツクによって、めくりローラ２の位置を検出し、その速度位置制御及び正逆転動作を行っている。
【００８０】
また、これらのめくり搬送ベルト駆動制御ボード３１１、及び、めくりユニット駆動制御ボード３１２は、メイン制御ボード３１０とそれぞれ接続されており、このメイン制御ボード３１０との間で、それぞれシリアル通信によりコマンドの送受信を行っている。
操作表示ボード３１３は、プリント置数、変倍率、ページめくり枚数、及び、各モード等を設定する各キー入力と、これらのキー入力に対する表示や、エラー表示、めくり状態表示、及び、各モードの原稿セット方法等の表示を行う。
【００８１】
ここで、モード表示においては、接続機器（プリンタ３００）の能力により可能なモードしか表示しないか、あるいは、不可能なモードが選択された場合にエラー表示を行う。
例えば、両面プリントのできないプリンタが接続されているにも拘らず、両面モード選択キー６１２のキー入力がなされた場合に、”接続のプリン夕は両面不可です”等のエラー表示が行われる。
また、原稿の読み取りは、この操作表示ボード３１３上のスタートキー６００のキー入力により開始される。
さらに、この操作表示ボード３１３と、メイン制御ボード３１０とは、シリアル通信によりコマンド、あるいは、データの送受信を行っている。
【００８２】
第１画像処理ボード３１４は、第１読み取りセンサユニット９に内蔵されているＳｉ等倍センサ３１５（以下これを第１ＣＣＤ３１５とする）のドライブクロックを発生する機能と、同じく第１読み取りセンサユニット９に内蔵されている第１ＬＥＤ３１６のＯＮ／ＯＦＦタイミングをとる機能と、第１ＣＣＤ３１５の出力を増幅し、この出力をＡ／Ｄ変換して画像処理を行う機能を有している。 また、この第１画像処理ボード３１４では、シェーディング補正、ＭＴＥ補正、主走査変倍、文字処理、写真処理、及び、ネガ・ポジ反転等の画像処理が行われる。
この第１画像処理ボード３１４は、メイン制御ボード３１０に接続されており、このメイン制御ボード３１０との間で、テータやコマンドを送受信している。第２画像処理ボード３１７は、上述の第１画像処理ボード３１４と同様に第２読み取りセンサユニット１４（第１読み取りセンサユニット９と同様に構成されている）に内蔵されている第２ＣＣＤ３１８のドライブクロックを発生する機能と、同じく第２読み取りセンサユニット１４に内蔵されている第２ＬＥＤ３１９のＯＮ／ＯＦＦタイミングをとる機能と、第２ＣＣＤ３１８の出力を増幅し、この出力をＡ／Ｄ変換して画像処理を行う機能を有している。
また、この第２画像処理ボード３１７では、第１画像処理ボード３１４と同様に、シェーディンク補正、ＭＴＦ補正、主走査変倍、文字処理、写真処理、及び、ネガ・ポジ反転等の画像処理が行われる。
さらに、この第２画像処理ボード３１７は、メイン制御ボード３１０に接続されており、このメイン制御ボード３１０との間で、データやコマンドを送受信している。
【００８３】
第１高圧電源３２０は、前述したように、第１バイアスローラ３に高圧交流電圧を印加する電源であって、原稿吸着用と、ベルト除電用の２通りの周波数を発生できるように構成されており、各周波数の切り換えは、メイン制御ボード３１０の２本の出力ポートからの切り換え信号により行われる。
また、第２高圧電源３２１は、第１高圧電源３２０と同様に、第２バイアスローラ１１に高圧交流電圧を印加する電源であって、原稿吸着用と、ベルト除電用の２通りの周波数を発生できるように構成されており、各周波数の切り換えは、メイン制御ボード３１０の２本の出力ポートからの切り換え信号により行われる。
【００８４】
給紙クラッチ１２８は、メイン制御ボード３１０からの制御信号に基づいて、シート原稿２００の給紙開始タイミングを制御している。
また、メイン制御ボード３１０の各入力ポートに接続されている各種センサ２５，２６，２７，２８，２９，３０，３１，３２，３３，３４は、前記の機構説明において述べた通り、モード切り換え、タイミング検知、及び、異常検知等を行っており、それぞれ、その検知信号をメイン制御ボード３１０に与えている。
【００８５】
次に、ＭＦＤＳの動作モードについて説明する。
ＭＦＤＳの動作モードは、大きく２つのモードに分けられている。
このＭＦＤＳの第１の動作モードは、第３０図に示すような、ブック原稿の自動ページめくり読み取り動作を行うブック原稿読み取りモードであり、第２の動作モードは、第３１図に示すような、シート原稿の自動給紙読み取り動作を行うシート原稿読み取りモードである。
【００８６】
これらのブック原稿読み取りモード、及び、シート原稿読み取りモードは、それぞれさらに細分化されたモードを持っている。
すなわち、ブック原稿読み取りモードには、第３０図に示すように、ブック原稿９２のブックサイズを自動的に認識する自動ブックサイズ認識モードと、操作表示ボード３１３のキー入力でブックサイズを指定するブックサイズキー入力モードとがある。
これらの、自動ブックサイズ認識モード、及び、ブックサイズキー入力モードでは、何れも、原稿面を上向きに見開いた状態でブック原稿９２をセットする見開き読み取りモードにより、ブック原稿９２に対する自動ページめくり読み取り動作が行われる。
さらに、このブック原稿読み取りモードは、その読み取り方式として、出力装置（特にプリンタ）と関連して、見開かれたブック原稿９２の左右２ページ分の原稿画像を連続して読み取り、この２ページ分の画像を１枚の転写紙上にプリントする見開き２ページ連続読み取りモードと、両面画像形成機能を有するプリンターを使用して、上述の見聞き２ページ連続読み取りモードにより左右２ページ分の原稿画像がプリントされた１枚の転写紙の裏面に、見開かれたブック原稿９２の次の左右２ページ分の読み取り画像を連続して形成する、この見開き２ページ連続読み取りモードの両面モードと、見開かれたブック原稿９２の左右面ページの原稿画像を１頁ずつ区切って読み取り動作を行う見開き１ページ区ぎり読み取りモードと、この見開き１ページ区ぎり読み取りモードによりプリントされた転写紙の裏面に、上記両面画像形成機能を有するプリンタにより、見開かれたブック原稿９２の次の左右両ページの原稿画像を１頁ずつ区切って形成する、この見開き１ページ区ぎり読み取りモードの両面モードとを有している。
【００８７】
一方、シート原稿読み取りモードには、第３１図に示すように、第１読み取りセンサユニット９、もしくは、第２読み取りセンサユニット１４の位置を固定した状態で、シート原稿２００を自動で給送・排出移動させながら、シートスルー方式により原稿画像の読み取りを行うシート原稿スルーモードと、原稿載置面１１６上にシート原稿２００をセット（定置）した状態で、ページめくり読取ユニット１の第１読み取りセンサユニット９を繰返し往復移動（スキャン）させて、シート原稿２００の読み取り動作を行うシート原稿スキャンモードと、自動原稿給送機能（ＡＤＦ）で原稿をセットできない（あるいはセットしない）場合に、手動で原稿をセットするシート原稿手動開閉モードとがある。
また、シート原稿スルーモードには、シート原稿２００の片面のみの画像を読み取る片面読み取りモードと、第１読み取りセンサユニット９及び第２読み取りセンサユニット１４で、シート原稿２００の両面の画像を同時に読み取る両面読み取りモードとがある。
さらに、この両面読み取りモードは、第１読み取りセンサユニット９及び第２読み取りセンサユニット１４を、互いに向き合った同一位置に配置して、原稿画像の読み取りを行う同一位置読み取りモードと、第１読み取りセンサユニット９及び第２読み取りセンサユニット１４を、互いにずらした別位置に配置して、原稿画像の読み取りを行う別位置読み取りモードとを有している。
【００８８】
以上、ＭＦＤＳの動作モードについて説明してきたが、次に、第３２図を参照しながら、上述した個々のモードの切り換えについて説明する。
第３２図において、ＭＦＤＳのメイン電源をＯＮすると、第２９図で示したメイン制御ボード３１０、めくり搬送ベルト駆動制御ボード３１１、めくりユニット駆動制御ボード３１２、操作表示ボード３１３、第１画像処理ボード３１４、第２画像処理ボード３１７が、それぞれリセットされて初期設定が行われる。 その後、プリンタ３００等の接続機器の接続をチェックし、この接続機器に対応可能なモードを表示する一方、プリント値数、変倍率、ページめくり枚数、及び、各モード等を設定する各キーの入力を受け付ける。
また、この間に、ブック原稿９２またはシート原稿２００のセットが行われる。
【００８９】
ここで、シート原稿２００が、シート原稿トレイ９４にセットされた場合には、シート原稿センサ２５がＯＮされる。
【００９０】
また、ここで、操作表示ボード３１３のオープンキー６２０によりＭＦＤＳの搬送部１９が開放され、その原稿載置面１１６の中央基準位置決め部２４に、ブック原稿９２が、見開かれた状態でセットされた場合には、ブック原稿センサ２７がＯＮされる。
これらのシート原稿センサ２５とブック原稿センサ２７のＯＮ／ＯＦＦの状態、及び、操作表示ボード３１３のテンキー６０２により入力されたシート原稿２００のプリント枚数を示すプリント置数に応じて、原稿画像の読み取りモードが、第３２図に示すように切り替わる。
すなわち、ここで、ブック原稿センサ２７がＯＦＦ、シート原稿センサ２５がＯＮで、且つ、プリント置数が「１」の場合には、シート原稿スルーモードへ遷移する。
また、ここで、ブック原稿センサ２７がＯＦＦ、シート原稿センサ２５がＯＮで、且つ、プリント置数が「２」以上の場合には、シート原稿スキャンモードへ遷移する。
さらに、ブック原稿センサ２７、及び、シート原稿センサ２５が、両方共○ＦＦの場合には、シート原稿手動開閉モードへ遷移する。
また、ブック原稿センサ２７がＯＮで、シート原稿センサ２５がＯＦＦの場合には、ブック原稿読み取りモードに遷移する。
さらに、ここで、ブック原稿センサ２７、及び、シート原稿センサ２５が、両方共ＯＮの場合には、異常処理１（警告ブザーＯＮ、及び、エラー表示）を行って、ユーザーに注意を促した後、ブック原稿読み取りモードに遷移する。
このようにして、それぞれ選択されたモードサブルーチンへ入った後、操作表示ボード３１３のスタートキー６００が押されていなければ、画像読み取り動作を実行せずに、キー入力を受け付けるステップにリターンされる。
【００９１】
次に、上述した、各モードの動作について、説明する。
先ず、第３３図を参照して、ブック原稿読み取りモードについて説明する。 ＭＦＤＳのモードが、ブック原稿読み取りモードに入ると、スキャンカットオフセンサ３４のＯＮ／ＯＦＦのチェックが行われる。
このスキャンカットオフセンサ３４は、第４図に示したように、ページめくり読取ユニット１が、その上限位置まで上昇したときに、その上限検知部７６を検知してＯＮされる。
ページめくり読取ユニット１は、前述したように、原稿載置面１１６上に載置されたブック原稿９２の厚さに応じて上下動される。
このページめくり読取ユニット１の上昇、すなわち、ブック原稿９２の厚さが厚くなるに従って、これを駆動するめくり搬送ベルト８のテンションが高くなる。
従って、このめくり搬送ベルト８のテンションが高くなりすぎると、つまり、ブック原稿９２が厚すぎてページめくり読敢ユニット１が上昇しすぎると、このテンションがブレーキとなって、ページめくり読取ユニット１のスキャンができなくなる。
スキャンカツトオフセンサ３４は、このような、ブック原稿９２が厚すぎて、ページめくり読取ユニット１がスキャンできないレベルを検知している。
このスキャンカットオフセンサ３４がＯＮの場合には、異常処理２（警告ブザーのＯＮと、”ブック原稿が厚すぎます”のエラー表示）を行って、ユーザーが無理に搬送部１９を閉じて、この搬送部１９を破損することがないようにしている。
ここで、ブック原稿９２の厚さが適応レベル以下の場合には、ユーザーにより搬送部１９が閉じられることによって、搬送部ロックセンサ３１がＯＮされる。
このとき、搬送部１９が開いたまま、すなわち、搬送部ロックセンサ３１がＯＦＦのままであれば、異常処理３（警告ブザーのＯＮと、“搬送部を閉じて下さい”の表示）が行われる。
そして、この搬送部１９が閉じられると、ブックサイズ上限センサ３３のＯＮ／ＯＦＦのチェックが行われる。
ここで、ブックサイズ上限センサ３３が、ブック原稿９２のブックサイズを検知してＯＮされている場合、すなわち、原稿載置面１１６にセットされているブック原稿９２のブックサイズが、ページめくり読取ユニット１の読み取り領域を越えた読み取り不可能なブックサイズの場合には、異常処理４（警告ブザーのＯＮと、”ブック原稿のサイズが大きすぎます”の表示）が行われる。
【００９２】
その後、プリント置数、変倍率、めくり枚数のキー入力の有無のチェックが行われた後、自動ブックサイズ認識モードの場合には、プレスキャンプラグがセットされ、自動ブックサイズ認識モードでない場合には、ブックサイズ入力モードとなり、操作表示ボード３１３により所定のキー入力を行ってブックサイズを設定することにより、ブック原稿９２の読み取り領域が決定される。
そして、スタートキー６００が押されることにより、搬送部ロック装置１４０が作動して、搬送部１９が原稿台１８にロックされる。
これにより、ページめくり読取ユニット１によるページめくり動作中に、ユ、ザーが間違って搬送部１９を開放して、ブック原稿９２を破損するような事態が回避される。
【００９３】
次いで、この搬送部ロック装置１４０の作動後、前述したプレスキャンフラグがセットされている場合には、ページめくり読取ユニット１のプレスキャン動作が実行される。
ここで、プレスキャンプラグがセットされていない場合には、このプレスキャン動作がスキップされる。
このプレスキャン動作後は、接続機器（プリンタ３００）の準備が整うまで待機される。
そして、この接続機器（プリンタ３００）の準備が整った段階で、接続機器（プリンタ３００）から出力される読み取り開始信号を受けると、ページめくり読取ユニット１が駆動されて、前述したように、ブック原稿９２の原稿画像の読み取り動作が開始される。
このページめくり読取ユニット１による読み取り動作は、前に設定されているプリント置数に応じた回数だけ、繰り返して行われる。
そして、この所定回数の読み取り動作が完了すると、次ページの原稿画像の読み取り動作を行うべく、前述したように、ページめくり読取ユニット１によって、ページめくり動作が実行される。
このようにして、ブック原稿９２の原稿画像の読み取り動作、及び、ページめくり動作は、それぞれ、予め設定された置数に応じて、その最終ページかめくられるまで、繰り返し実行される。
そして、予め設定された最終めくりペーシのページめくり動作が完了し、且つ、最終読み取りページに対する所定回数の読み取り動作が完了すると、この最終読み取りページのページめくり動作を行わずに、ページめくり読取ユニット１が、そのホームポジション位置１−Ａに復帰されて、このブック原稿読み取りモードルーチンがリターンされる。
ブック原稿読み取りモードの基本動作は、以上の第３３図に示すフローチャートの通りであるが、このモード中の前述した、見開き２ページ連続読み取りモードと、その両面モード、及び、見開き１頁区切り読み取りモードと、その両面モードは、第３２図のキー入力セット時に受け付けた入力モードとなる。
これらの各入力モードについては、スタートキー６００が押されてからの経過を示すタイミングチャートを参照して説明する。
【００９４】
先ず、第３４図に示すタイミングチャートを使用して、見開き２ページ連続読み取りモードについて説明する。
第３４図において、操作表示ボート３１３のスタートキー６００が押されて、読み取りスタートスイッチＳＷがＯＮされると、第１読み取りセンサユニット９内のシャツ夕（図示せず）が閉じる。
このシャツ夕の内面は、白色基準板になっていて、これにより、第１読み取りセンサユニット９のシェーディング補正が行われる。
このシェーディング補正は、ページめくり読取ユニット１の立上り時に毎回行われ、ページめくり読取ユニット１の移動速度が一定速度になる前に完了される（この部分のタイミングチャートは図示せず）。
このページめくり読取ユニット１のスタートは、メイン制御ボード３１０から、めくり二ニット駆動制御ボード３１２へ送られる正転スタート信号によって行われる。
この正転スタート信号により、ページめくり読取ユニット１が、プレスキャンを開始する。
ここで、ページめくり読取ユニット１の移動速度が一定速度Ｖｆに立ち上がった後は、前述のシャツ夕が既に開かれており、第１ＣＣＤ３１５により、ブック原稿９２の原稿画像の読み取りが開始されている。
このページめくり読取ユニット１のプレスキャン時の読み取りにより、見開かれたブック原稿９２の端部を画像処理でエッジ検出し、このときのめくりローラ２に取付けられたエンコーダー１５２の出力をカウントすることによって、原稿載置面１１６にセットされたブック原稿９２のブックサイズを認識して、ページめくり読取ユニット１の原稿画像の読み取り領域、及び、ページめくり領域を決定する。
【００９５】
このように、このＭＦＤＳは、ブック原稿９２が原稿載置面１１６のセンターを基準としてセットされるように構成されているので、このセットされたブック原稿９２の左端部のみを検出することによって、そのページめくり読取ユニット１の原稿画像の読み取り領域、及び、ページめくり領域を算出することができる。
【００９６】
従って、このＭＦＤＳでは、ブック原稿９２のブックサイズ検知に際して、ページめくり読取ユニット１を全面プレスキャンさせる必要がなく、ページめくり読取ユニット１をショートプレスキャンさせるだけで、原稿載置面１１６上に載置されたブック原稿９２のブックサイズを検知することができる。
これにより、このページめくり読取ユニット１のプレスキャン時に、ブック原稿９２の読み取り開始ページを誤ってページめくりすることがなくなる。
このブック原稿９２のブックサイズデータは、メイン制御ボード３１０から、外部接続機器としてのプリンタ３００に送信される。
【００９７】
一方、このブックサイズ検知が完了し、そのブックサイズデータがプリンタ３００に送信されている間に、メイン制御ボード３１０から、めくりユニット駆動制御ボード３１２に対して、めくりユニット駆動モータ６０を逆転させる逆転信号が与えられ、ページめくり読取ユニット１が速度Ｖｒの速さで、そのホームポジション位置１−Ａに向けて復帰移動される。
なお、このＭＦＤＳの原稿台１８の原稿載置面１１６を、有彩色、例えば、黄色などのような、ブック原稿としてあまり使用されていないような有彩色で着色しておくことにより、この原稿載置面１１６と、ブック原稿９２の原稿画像の読み取り領域との、領域識別精度を高めることができるので、上述のプレスキャン時におけるブックサイズ検知をより正確に行うことができ、そのブックサイズデータの信頼性が向上される。
また、ここで、原稿載置面１１６を、例えば、灰色などの中間色で着色しておけば、第１読み取りセンサユニット９の第１ＣＣＤ３１５として、カラーセンサを使用せずに、プレスキャン時の領域識別が可能となる。
【００９８】
上述のプレスキャンが終了して、ページめくり読取ユニット１がホームポジション位置１−Ａに退避した後、プリンタ３００の準備ができて、プリンタ３００からメイン制御ボード３１０に対し、データの転送を要求する転送要求信号が与えられると、これにより、メイン制御ボード３１０から、めくりユニット駆動制御ボード３１２に対して、めくりユニット駆動モータ６０を正転させる正転信号が与えられ、ページめくり読取ユニット１の正転動作が開始される。
このページめくり読取ユニット１は、前述したように、めくりローラ２のエンコーダ１５２の出力がフィードバックされることによって、ブック原稿９２の原稿面に治って、速度Ｖｆの速さに定速度制御されて、そのエンドポジション位置１−Ｃに向けて移動される。
このとき、第１読み取りセンサユニット９のＬＥＤ３１６は、既に点灯されており、この第１読み取りセンサユニット９の第１ＣＣＤ３１５により、フック原稿９２の原稿情報の読み取りが開始されている。
【００９９】
ここで、第１図に示すように、原稿載置面１１６上に見開かれてセットされたブック原稿９２の綴じ部（センター部）付近は、原稿面の反りがきついため、この綴じ部付近の原稿情報を正確に読み取ることが困難となる。
また、このブック原稿９２の綴じ部付近には、通常、文字や画像等の原稿情報が形成されることがない。
そこで、このＭＦＤＳでは、第３４図に示すように、このブック原稿９２の綴じ部付近において、第１ＣＣＤ３１５の読み取りＳＦＧＡＴＥがＯＦＥされ、この綴じ部付近の原稿情報の読み取りがマスクされるようになっている。
この原稿情報の初期設定時におけるマスク領域は、前述したように、中央基準位置決め部２４のセンターより十１０ｍｍ、一１０ｍｍとなるように設定されているが、このマスク領域は、操作表示ボード３１３のブック綴じ部マスク領域設定キー６０８のキー入力によって、その設定値を変更し得るようになっており、特殊な装丁のブック原稿にも対応できるようになっている。
ところで、第１読み取りセンサユニット９によるブック原稿９２の原稿情報の読み取りは、ページめくり読取ユニット１がそのエンドポジション位置１‐Ｃに至るまで行われるが、このページめくり読取エニット１が、ブック原稿９２のセンター付近に到達した時点で、第１高圧電源３２０が周波数ｆ１てＯＮされる。これにより、めくり搬送ベルト８のブック原稿９２の右側のページに当接する部分に、前述した電荷パターンが形成される。
このめくり搬送ベルト８は、上述のように、ペ一ジめくり読取ユニット１が駆動されているときには駆動されず、ブック原稿９２を押える働きをしている。
【０１００】
このようにして、ページめくり読取ユニット１が、そのエンドポジション位置１−Ｃまで駆動されて、ブック原稿９２の右端部の読み取り領域までの原稿情報の読み取りが終了すると、第１高圧電源３２０の出力がＯＦＦされるとともに、メイン制御ボード３１０からめくりユニット駆動制御ホード３１２に対して、めくり信号が与えられ、ページめくり読取ユニット１によるブック原稿９２のぺージめくり動作が開始される。
このとき、この第１読み取りセンサユニット９の読み取った原稿面が、予め設定されたブック原稿９２の最終読み取りペーシに相当している場合には、メイン制御ボ一ド３１０からめくり信号が出力きれず、このページめくり読取ユニット１は、このブック原稿９２の最終読み取りページの読み取りを終えた後、上述のページめくり動作を行わずに復帰移動されて、そのホームポジション位置１ーＡに退避される。
ブック原稿９２のページめくり動作時において、ページめくりセンサ２９がＯＮされるまでの間は、ペーシめくり読取ユニット１の逆転動作がスロースタートされ、めくり搬送ベルト８上に静電的に吸着されたブック原稿９２の読み取り終了ページ（第１図における右ページ）が、そのページ収納部７内に導かれる。
【０１０１】
そして、ページめくり読取ユニット１が、そのホームポジション位置１ーＡに向けて、さらに復帰移動され、このブック原稿９２の読み取り終了ページのセンター部分までがページ収納部７内にめくり込まれる。
また、このページめくり読取ユニット１のページめくり動作時においては、めくり搬送ベルト８の原稿吸着領域の電荷パターンを除電するために、第１高圧電源３２０が周波数ｆ２でＯＮされる。
【０１０２】
このようにして、ページめくり読取ユニット１のページ収納部７内にめくり込まれたブック原稿９２の読み取り終了ページは、ページめくり読取ユニット１が、ブック原稿９２のセンター部を越してから、そのエンドポジション位置１−Ｃに至る間に、ページ収納部７内から排出されて、そのページめくり動作が完了する。
【０１０３】
このページ排出時におけるページめくり読取ユニット１のリターン速度Ｖｒｍは、その原稿読み取り時における速度Ｖｆよりも大きくなるように、すなわち、Ｖｒｍ＞Ｖｆとなるように設定されており、このページめくり動作の高速化が図られている。
この１連のページめくり動作の状態は、ペーシめくりセンサ２９により検知されている。
すなわち、このＭＦＤＳは、ページめくり読取ユニット１の各位置におけるページめくりセンサ２９のＯＮ／ＯＦＦがチェックされることにより異常の有無が検出され、異常がある場合に、異常処理動作が実行される。
この異常処理動作としては、警告ブザーが作動されるとともに、例えば、ページ収納部７へ原稿ページをめくり込めない場合には、”ペーシめくり不能”、ページ収納部７にめくり込まれた原稿ページを排出できない場合には、“ページ重ね不能”等の表示が、操作表示ボード３１３に表示され、さらに、このページめくり動作が停止される。
また、この異常が発生したページめくり状態をユーザーが確認できるようにするために、このペーシめくり状態の異常発生箇所が、操作表示ボード３１３に表示される。
【０１０４】
以下、ブック原稿９２の２ページ目以降の原稿画像の読み取り、及び、ページめくり動作は、プリンタ３００からの転送要求信号によって、順次スタートされ、上述と同様の読み取り動作、及び、ページめくり動作が、予め設定された最終読み取りぺ−ジに至るまで、繰り返し実行される。
ここで、第３４図のタイミングチャートでは、原稿のプリント置数を「１」とした場合、すなわち、ブック原稿９２の各読み取りページを、それぞれ１回読み取る毎に、この読み取りを終えたページのめくり動作を実行する場合について示したが、この原稿のプリント置数が「２」以上に設定されている場合には、第１読み取りセンサユニット９による第１回目の原稿読み取り動作が完了した時点で、メイン制御ボード３１０からめくりユニット駆動制御ボード３１２に対して、めくり信号の代わりに逆転信号が送信され、ページめくり読取ユニット１が速度Ｖｒでの速さで、そのホームポジション位置１−Ａに向けてリターンされ、このリターン動作が終えると同時に、このページめくり読取ユニット１の第２回目の原稿読み取り動作がスタートされる。
そして、このようなページめくり読取ユニット１の原稿読み取り動作が、予め設定された原稿のプリント置数の回数分だけ、繰り返し実行され、この動作の回数とプリント置数とが一致した時点で、初めて、メイン制御ボード３１０からめくりユニット駆動制御ボード３１２に対して、めくり信号が送信され、上述したページめくり動作が実行される。
【０１０５】
以下、ブック原稿９２の２ページ目以降の原稿画像の読み取り、及び、ページめくり動作は、プリンタ３００からの転送要求信号によって、順次スタートされ、上述と同様のプリント置数に応じた回数の読み取り動作、及び、ページめくり動作が、予め設定された最終読み取りページに至るまで、繰り返し実行される。また、ここで、プリント変倍キー６１４により、読み取った原稿画像が変倍されるように設定されている場合には、第１読み取りセンサユニット９のスキャン速度Ｖｆが、その変倍率に応じた速度に可変されることによって、この原稿画像の副走査方向の変倍がなされるとともに、第１画像処理ボード３１４によって、この原稿画像の主走査方向の変倍処理がなされる。
【０１０６】
一方、上述のような、見開き２ページ連続読み取りモードの両面モードにおいては、プリンタ３００が原稿画像の両面プリントを行なうために、このプリンタ３００からのメイン制御ボード３１０への転送要求信号の送信タイミングが多少遅れる点は異なるが、それ以外の動作に関しては、前述した見開き２ページ連続読み取りモードと同様の動作が実行される。
【０１０７】
次に、第３５図を参照して、見開き１ページ区切り読み取りモードについて説明する。
この見開き１ページ区切り読み取りモードは、見開かれたブック原稿９２の左ページと、右ページとを別々に読み取って、画像形成を行なうモードで、これらの各画像を別々の転写紙にプリントするモードと、１枚の転写紙の表裏にプリントするモ−ド（この見開き１ページ区切り読み取りモードの画面モード）とがある。
また、このモードにおいては、ブック原稿９２の左ページから読み取る動作と、右ページから読み取る動作との、何れか一方の動作を、操作表示ボード３１３の読み取り開始ページ選択キー６０３のキー入力により選択設定することができる。
【０１０８】
第３５図は、ブック原稿９２の向かって左ページから読み取りを開始する場合のタイミングチャートを示している。
この見開き１ページ区切り読み取りモードの動作は、前述した見開き２ページ連続読み取りモードの両面モードの動作と略同じであり、この見聞き２ページ連続読み取りモードの両面モードの動作と異なる点としては、プリンタ３００からメイン制御ボード３１０への転送要求信号が、１ページ毎に送信される点であって、これにより、ページめくり読取ユニット１が、ブック原稿９２の左ページから右ペーシに向けて等速で移動（スキャン）される。
【０１０９】
第３６図は、この見開き１ページ区切り読み取りモードにおいて、ブック原稿９２の右ページから読み取りを開始するように、セットされている場合のタイミングチャートを示している。
このタイミングチャートから明らかなように、ブック原稿９２の右ページから読み取りが開始される場合には、このブック原稿９２の読み取りが行なわれない左ページに対するページめくり読取ユニット１の移動速度が、右ページに対する第１読み取りセンサユニット９のスキャン速度Ｖｆよりも速い速度となるようにプログラムされていて、原稿読み取り時間の短縮化、すなわち、読み取り機能の性能アップが図られている。
また、この見開き１ページ区切り読み取りモードにおいて、読み取りスキップページ設定キー６１８により、スキャンをせずに読み飛ばす（スキップする）ページが設定されている場合には、この読み取りスキップページシに対するページめくり読取ユニット１が、読み取りを行なう時の第１読み取りセンサユニット９のスキャン速度Ｖｆよりも速い速度で移動されて、直ちに、この読み取りスキップページのめくり動作が実行されるようにプログラムされている（タイミングチャートは図示せず）。
ところで、一般的には、第３５図及び第３６図に示したように、プリンタ３００からメイン制御ボード３１０に対して、通常状態で連続して転送要求信号を要求できるプリンタは少ない。
【０１１０】
そこで、このような一般的なプリンタを使用して、この見開き１ページ区切り読み取りモードを実施する場合には、このプリンタ側において、２枚の転写紙を重連するように給紙させることによって実現させることができる。
また、ここで、転写紙と感光体ドラムとのレジストの関係上、これらの２枚の転写紙間に、どうしても、ある程度の距離を設けなければならないような場合には、ブック原稿９２の左ページ側の画像データはそのままプリンタに流し、ブック原稿９２の右ページ側の画像データは、ディレーメモリを通して、これら転写紙間の距離に相当する時間だけ、プリンタへの転送タイミングを遅延させることにより実現させることができる。
この後者の場合の一例のブロック図を第３７図に、また、そのタイミングチャートを第３８図に示す。
この例では、メイン制御ボード３１０上の内部の各ゲートＡ，Ｂにより、切り換え器を通してプリンタへそのまま出力される画像データに対して、ティレーメモリを通してプリンタへ出力される画像データが、時間Ｔｄだけ遅延されるように構成されている。
【０１１１】
次に、この見開き１ページ区切り読み取りモードにおける両面モードについて説明する。
先ず、見開かれたブック原稿９２の左右２ページの画像データを１枚の転写紙の表裏にプリントする場合について説明する。
この場合には、プリンタ３００側において、転写紙を反転搬送する必要があるため、その左ペーシの画像データのプリントを終えてから、右ペーシの画像データのプリントを開始するまでに、多少の時間が掛る。
このため、このモードでは、ページめくり読取ユニット１がブック原稿９２の左ページの読み取りを終えて、その綴じ部付近に到達した時点で、このページめくり読取ユニット１の駆動が一旦停止される。
そして、プリンタ３００側での左ページ画像のプリント、及び、この転写紙の反転搬送が完了し、プリンタ３００からメイン制御ボード３１０に転送要求信号が出されると、停止されていたページめくり読取ユニット１が再び所定のスキャン速度Ｖｆで駆動されて、ブック原稿９２の右ページの読み取りが行なわれ、この右ページの画像データがプリンタ３００に転送されて、表面に左ページ画像のプリントされた転写紙の裏面に、この右ページ画像がプリントされて、両面プリントが行なわれる。
この時の、タイミングチャートを第３９図に示す。
【０１１２】
次に、この見開き１ページ区切り読み取りモードにおいて、プリントされた転写紙の表裏と、ブック原稿９２の原稿面の表裏との関係を、一致させて画像形成する場合の両面モードについて説明する。
このモードにおいて、ブック原稿９２の左ページから読み取りを開始する場合には、前述したように、プリンタ３００に対して、２枚連続給紙を行なうように指示し、左ページ画像のプリントされた転写紙はそのまま排紙させる一方、右ページ画像のプリントされた転写紙は反転搬送させて、その裏面にフック原稿９２の次ページの左ページ画像をプリントするための準備を行なっておく。
この間に、ＭＦＤＳ側においては、読み取りを終えた原稿ページのページめくり動作が行なわれる。
このＭＦＤＳ側でのページめくり動作が完了されると、次ページに対する読み取り動作が実行され、前に、右ページ画像がプリントされて反転搬送された転写紙の裏面に、読み取られた左ペーシ画像がプリントされて排出される。
また、この時読み取られた右ページ画像は、新たに給紙された転写紙にプリントされる。
この転写紙は、先の転写紙と同様に、反転搬送きれて、その裏面にブック原稿９２の次ページの左ページ画像をプリントするための準備が行なわれる。
このような１連の動作が繰り返し実行されることにより、ブック原稿９２と全く同様なページ構成の原稿画像がプリントされた転写紙が得られる。
以上が、ブック原稿読み取りモードにおける動作の一例である。
【０１１３】
ここで、見聞き読み取りモードにおけるブック原稿のセットについて説明する。
第２９図の接続機器チェックにおいて、プリンタ３００が裏面排紙可能な場合には、次のような表示が行なわれる。
すなわち、
”ブック原稿が横書き（左開き）ならば、読み取りたい先頭ページを見開いて正面上向きにセットして下さい。”
“ブック原稿が縦書き（右開き）ならば、読み取りたい先頭ページを見開いて天地逆上向きにセットして下さい。”
のように、ブック原稿の横書き、縦書きに対する、それぞれのセット方法が指示される。
【０１１４】
これに対し、第２９図の接続機器チェックにおいて、プリンタ３００が表面排紙のみ可能な場合には、次のような表示が行なわれる。
すなわち、
”ブック原稿が横書き（左開き）ならば、読み取りたい最終ページを見開いて天地逆上向きにセツトして下さい。”
”ブック原稿が縦書き（右聞き）ならば、読み取りたい最終ページを見開いて正面上向きにセットして下さい。”
のように、ブック原稿の横書き、縦書きに対する、それぞれのセット方法が指示される。
このＭＦＤＳでは、上述のような指示に従って、ブック原稿９２をセットすることにより、これに接続されるプリンタ３００の機能に関わらず、排出される転写紙のページ揃えを行なうことができる。
また、このＭＦＤＳにおけるページめくり枚数の入力方法には、操作表示ボード３１３のキー入力による２通りの入力方法があり、これらの入力方法の内の何れか１つを、ユーザーが好みによって選択できるようになっている。
この人力方法の一つは、読み取り総ページ設定キー６０６等を使用して、読み取りたい総ページ数を設定する方法であり、他の入力方法は、読み取り開始ページ設定キー６０４、読み取り最終ぺ一ジ設定キー６０５等を使用して、読み取りたい先頭ぺージと、最終ページを入力する方法である。
このＭＦＤＳにおけるぺージめくり枚数の入力は、上記の何れの方法で行なうにせよ、ページめくり続取ユニット１のページめくり回数を正確に算出できればよい。
【０１１５】
以下、上述の各方法におけるページめくり回教の算出方法について説明する。
先ず、読み取りたい総ページ数を入力した場合について説明する。
ここで、読み取りたい総ページ数をＸとし、めくり回数をＭとすれば、
左ページから続み取る場合には、
（Ｘ一２）／２＝Ｍ＋余り …▲１▼
右ページから読み取る場合には、
（Ｘ−１）／２＝Ｍ＋余り …▲２▼
となり、これらの式よりＭの値を算出する事により、そのめくり回数が求められる。
次に、読み取りたい先頭ページと、最終ページを入力した場合について説明する。
ここで、読み取りたい先頭ページをＹ、最終ページをＺととし、読み取りたい総ページ数をＸとすれば、
Ｘ＝Ｚ−Ｙ＋１ …▲３▼
となり、この▲３▼式を、前記の▲１▼式、▲２▼式に代入することにより、めくり回数Ｍを算出する事ができる。
ところで、このＭＦＤＳは、前述したように、１台の装置で、ブック原稿と、シート原稿とを選択的に読み取って、その画像形成を行うことができるように構成されている。
ブック原稿に関する画像読み取りモードは、上述した通りであり、以下、このＭＦＤＳにおけるシート原稿の画像読み取りモードについて説明する。
このシート原稿の読み取りモードには、第３１図に示したように、シート原稿スルーモードと、シート原稿スキャンモードと、シート原稿手動開閉モードとがある。
【０１１６】
先ず、シート原稿スルーモードについて説明する。
このシート原稿スルーモードには、片面原稿読み取りモードと、両面原稿読み取りモードとがあり、この両面原稿読み取りモードに、同一位置読み取りモードと、別位置読み取りモードとがある。
これらのモードの選択は、第４０図に示すように行われる。
先ず、片面原稿読み取りモードでは、第４１図、及び、第４２図に示すように、シート原稿トレイ９４に、シート原稿２００が下向きにセットされ、この状態で、スタートキー６００が押されると、先ず、めくり搬送ベルト駆動モータ６１の電源がＯＮされ、駆動ローラ１２が回転されて、めくり搬送ベルト８が回動される。
【０１１７】
このとき、各センサと、各入力データに異常がなければ、給紙クラッチ１２８がＯＮされ、第１ベルト支持ローラ９７に取付けられた第２給紙プーリ１３０から給紙駆動ベルト１２７を介して、給紙ローラ９６が回転され、シート原稿２００が給紙分離パッド９５に向けて搬送される。
この給紙分離パッド９５よって、最下位の１枚だけのシート原稿２００が他のシート原稿から分離され、第１搬送ガイド１０８及び第２搬送ガイド１０９に案内されながら、めくり搬送ベルト８に接する位置まで搬送される。
ここで、この第２搬送ガイド１０９には、給紙センサ２６が取付けられており、この給紙センサ２６によって、シート原稿２００の後端が検知された後、給紙クラッチ１２８がＦＦされるように、シート原稿２００の搬送タイミングが設定されている。
一方この間に、このめくり搬送ベルト８の回転とともに、第２バイアス口−ラ１１に交流電源３５から交流の高電圧が印加されて、めくり搬送ベルト８にストライプ状の電荷パターンが形成される。
これにより、このめくり搬送ベルト８によって、給紙されたシート原稿２００が吸着されて搬送される。
このときのめくり搬送ベルト８の線速は、等倍時では３６０ｍｍ／ｓに、変倍時ではその設定倍率に応じて変化されるようになっている。
【０１１８】
一方、このモードでは、ページめくり読取ユニット１が、そのエンドポジション位置１−Ｃに位置しており、その第１読み取りセンサユニット９によって、めくり搬送ベルト８により搬送されたシ一ト原稿２００の原稿情報が順次読み取られる（画素密度は４００ｄｐｉ）。
そして、この読み取りを終えたシート原稿２００は、第３搬送ガイド１１０及び第４対向ローラ１０３，第５対向ローラ１０４，第６対向一ラ１０５，第７対向ローラ１Ｏ６により、挟持搬送されて、排紙口１１７から排紙トレイ２３上に排紙される。
この排紙口１１７の近傍の第３搬送ガイド１１０には、排紙センサ２８が取付けられていて、この排紙されるシート原稿２００の排紙ジャムが検知されている。
【０１１９】
そして、１枚目のシート原稿２００の読み取り動作が完了されると、次に、所定の給紙タイミングで、船紙クラッチ１２８が再びＯＮされ、２枚目のシート原稿２００が給紙されて、上述と同様な読み取り動作が実行される。
このようにして、シート原稿トレイ９４にセットされたシート原稿２００が順次給送されて読み取られ、最後の（最上位の）シート原稿２００が給紙されて、シート原稿センサ２５がＯＦＦすると、第２バイアスロ−ラ１１の電源が高周波交流電圧に切り替えられ、めくり搬送ベルト８の電荷パターンが除電されて、この最終のシート原稿２００が排紙された後、ＭＦＤＳの全ての動作が停止される。
【０１２０】
以上の読み取り動作は、このＭＦＤＳに裏面排紙機能を有するプリンタが接続されている場合の動作であり、これにより、シート原稿２００及びプリントされた転写紙のページ揃え排紙が実現される。
【０１２１】
ここで、このＭＦＤＳに接続されているプリンタが表面排紙機能しか有していない場合には、シート原稿トレイ９４上に、シート原稿２００を上向きにセットして、第２読み取りセンサユニット１４によって、このシート原稿２００の読み取りを行うことにより、上述した裏面排紙機能を有するプリンタの場合と同様に、シート原稿２００及びプリントされた転写紙のページ揃え排紙が実現される。また、この表面排紙機能を持ったプリンタが接続されている場合におけるその他の動作は、裏面排紙機能を有するプリンタが接続されている場合と同様である。
【０１２２】
次に、このシート原稿スルーモードにおける両面原稿読み取りモードについて説明する。
この両面原稿読み取りモードでは、横書きのシート原稿が、その原稿先端から下向きにして、シート原稿トレイ９４上にセットされる。
これは、第１読み取りセンサユニット９及び第２読み取りセンサユニット１４がメモリーを持っていないため、その主走査方向でのミラー反転しか用いることができないことによる。
【０１２３】
先ず、この両面原稿読み取りモードにおける同一位置読み取りモードの基本動作は、第４３図、及び、第４４図に示すように、片面原稿読み取りモードの掲合と同様であるが、このモードでは、ページめくり読取ユニット１が、そのホームポジション位置１−Ａに位置されて、原稿台１８がわの第２読み取りセンサユニット１４の位置と同一位置で、シート原稿２００の表裏両面の原稿情報の読み取りが、これらの第１読み取りセンサユニット９、及び、第２読み取りセンサユニット１４によって、同時に平行して実行される。
一方、この両面原稿読み取りモードにおける別位置読み取りモードの基本動作は、第４５図、及び、第４６図に示すように、片面原稿読み取りモードの場合と同様であるが、このモ‐ドでは、ページめくり読取ユニット１が、そのエンドポジション位置１ーＣに位置されている。
ここで明らかなように、この別位置読み取りモードでは、第１読み取りセンサユニット９と、第２読み取りセンサユニット１４との読み取り位置の間隔が、最大サイズの原稿の長さよりも大きくなるため、これらの第１読み取りセンサユニット９及び第２読み取りセンサユニット１４に読み取られたシート原稿２００の表裏両面の原稿情報が、時系列的に出力される。
【０１２４】
次に、シート原稿読み取りモードにおけるシートスキャンモードについて説明する。
このシートスキャンモードでは、第４７図、及び、第４８図に示すように、シート原稿トレイ９４に、シート原稿２００が上向きにセットされ、この状態で、スタートキー６００が押されると、先ず、めくり搬送ベルト駆動モータ６１の電源がＯＮされ、駆動ローラ１２が回転されて、めくり搬送ベルト８が回動される。
このとき、各センサと、各入力データに異常がなければ、給紙クラッチ１２８がＯＮされ、第１ベルト支持ローラ９７に取付けられた第２給紙プーリ１３０から給紙駆動ベルト１２７を介して、給紙ローラ９６が回転され、シート原稿２００が給紙分離パッド９５に向けて搬送される。
この給紙分離パッド９５によって、最下位の１枚だけのシート原禍２００が他のシート原稿から分離され、第１搬送ガイド１０８及び第２搬送ガイド１０９に案内されながら、めくり搬送ベルト８に接する位置まで搬送される。
ここで、この第２搬送ガイド１０９には、給紙センサ２６が取付けられており、この給紙センサ２６によって、シート原稿２００の後端が検知された後、給紙クラッチ１２８がＯＦＦされるように、シート原稿２００の搬送タイミングが設定されている。
一方この間に、このめくり搬送ベルト８の回転とともに、第２バイアスローラ１１に交流電源３５から交流の高電圧が印加されて、めくり搬送ベルト８にストライプ状の電荷パターンが形成される。
これにより、このめくり搬送ベルト８によって、給紙されたシート原稿２００が吸着されて搬送される。
このときのめくり搬送ベルト８の線速は、３６０ｍｍ／ｓに設定されており、シート原稿２００の先端がホームポジション位置１−Ａに到達したときに、めくり搬送ベルト８の回働が停止されるようになっている。
【０１２５】
一方、このモードでは、ページめくり読取ユニット１が、そのホームポジション位置１−Ａに位置しており、めくり搬送ベルトＳの回動が停止された後に、ページめくり読取ユニット１がめくりユニット駆動モータ６０によって、そのエンドポジション位置１ーＣに向けて移動されながら、その第１読み取りセンサユニット９によって、めくり搬送ベルト８により搬送されたシート原稿２００の原稿情報が順次読み取られる（画素密度は４００ｄｐｉ）。
この原稿情報の読み取り時には、第１バイアスローラ３に、第１高圧電源３２０により高周波交流電圧が印加され、めくり搬送ベルト８に形成されていた電荷パターンが除電される。
これにより、ページめくり読取ユニット１の復帰移動時におけるシート原稿２００のページめくり読取ユニット１内への進入が防止されている。
このようにしてシート原稿２００の読み取りを終えたページめくり読取ユニット１は、そのホームポジション位置１−Ａに向けてリターンされる。
また、このページめくり読取ユニット１のリターン時には、第１読み取りセンサユニット９がシート原稿２００の原稿面から上方に退避されるとともに、第１バイアスローラ３に第１高圧電源３２０から高圧交流電圧が印加されて、めくり搬送送ベルト８にストライプ状の電荷パターンが形成されて、このシート原稿２００がめくり搬送ベルト８に吸着されて固定される。
そして、上述のような動作がその設定回数だけ繰り返された後、めくり搬送ベルト駆動モータ６１がＯＮされて、めくり搬送ベルト８が回動され、この読み取りを終えたシート原稿２００が、排紙口１１７から排紙トレイ２３上に排紙される。
この排紙口１１７の近傍の第３搬送ガイド１１０には、排紙センサ２８が取付けられていて、この排紙されるシート原稿２００の排紙ジャムが検知されている。
そして、１枚目のシート原稿２００の読み取り動作が完了されると、次に、所定の給紙タイミングで、給紙クラッチ１２８が再びＯＮされ、２枚目のシート原稿２００が給紙されて、上述と同様な読み取り動作が実行される。
このようにして、シート原稿トレイ９４にセットされたシート原稿２００が順次給送されて読み取られ、最後の（最上位の）シート原稿２００が給紙されて、シート原稿センサ２５がＯＦＦすると、第２バイアスローラ１１の電源が第２高圧電源３２１の高周波交流電圧に切り替えられ、めくり搬送ベルト８の電荷パターンが除電されて、この最終のシート原稿２００が排紙された後、ＭＦＤＳの全ての動作が停止される。
【０１２６】
次に、このシート原稿スルーモードにおけるシート原稿手動開閉モードについて説明する。
このシート原稿手動開閉モードの動作は、第４９図、及び、第５０図に示すように、上述したシート原稿スキャンモードの動作における、シ−ト搬送手段、及び、シート吸着用の各電源をそれぞれＯＦＦの状態にし、オペレータが手操作により、シート原稿の入れ替えが行われる。
以下、このＭＦＤＳにおけるページめくり読取ユニット１の操作制御について説明する。
第５１図に、このＭＦＤＳにおけるページめくり読取ユニット１の操作制御回路を示す。
この操作制御回路は、ページめくり読取ユニット１の往復駆動制御、及び、その速度制御を行っており、めくりユニット駆動制御ボード３１２に組み込まれている。
第５１図において、マイクロコンピュータ５２０（以下、単にマイコンという）は、このＭＦＤＳのモード制御、及び、シーケンス制御も行っている（詳細は図示せず）。
このようなマイコン５２０としては、例えば、μＰＤ７１０５４Ｇによるプログラマブルインターバルタイマ５２１（以下、単にタイマという）が接続されている。
このタイマ５２１は、マイコン５２０の制御により、めくりユニット駆動モータ６０（直流モ−夕）の速度制御を行うためのパルス幅変調ＰＷＭ出力を送出するためのものである。
【０１２７】
このＰＷＭ制御の周期は、５０（μｓｅｃ）であり、これを４００ビットの分解能で制御する。
このタイマ５２１には、８ＭＨｚの発振器５２２が接続され、クロック信号が与えられるように構成されている。
また、めくりユニット駆動モータ６０は、マイコン５２０に対し、駆動用トランジスタＱ_１〜Ｑ_４を介して接続されている。
すなわち、トランシスタＱ_１，Ｑ_２がＯＮでトランジスタＱ_２，Ｑ_３がＯＦＦの状態で、めくりユニット駆動モータ６０には、時計方向（ＣＷ）に回転する電流が供給され、トランジスタＱ_２，Ｑ_３がＯＮで、トランジスタＱ_１，Ｑ_４がＯＦＦの状態で、めくりユニット駆動モータ６０には、反時計方向（ＣＣＷ）に回転する電流が供給される。
ここで、めくりユニット駆動モータ６０が、時計方向（ＣＷ）に回転すると、ページめくり読取ユニット１は往動され、めくりユニット駆動モータ６０が、反時計方向（ＣＣＷ）に回転すると、ページめくり読取ユニット１は腹動されるように設定されている。
このめくりユニット駆動モーク６０の回転方向は、マイコン５２０のポートＰＦ６，ＰＦ７からそれぞれ出力されるＣＷ信号、及び、ＣＣＷ信号により制御される。
【０１２８】
また、めくりローラ２には、その回転に従ってパルスを発生させるエンコーダ１５２が直結されている。
ここで、このエンコーダ１５２は、めくりユニット駆動モータ６０の回転量、及び、回転方向に応じて、位相の異なる２つのパルス信号を発生する。
１つは、Ａ相エンコーダパルスＥＮＣＡであり、他の１つは、Ｂ相エンコーダパルスＥＮＣＢである。
Ａ相エンコーダパルスＥＮＣＡは、分周マルチプレクサ５２４を介して、マイコン５２０のカウンタインプット端子Ｃ１に入力されている。
これにより、マイコン５２０は、Ａ相エンコーダパルスＥＮＣＡのパルス間隔が、マイコン５２０の内部のカウンタ（マイコン５２０の発振器５２５の発振周波数１ＯＭＨｚにより規制される）によって計測される。
また、このカウンタインプット端子Ｃ１への入力信号は、割込み入力となっており、割込みプログラムの処理中に、Ａ相エンコーダパルスＥＮＣＡのパルス間隔の測定データの値を読み、このデータに基づいて、めくりユニット駆動モー夕６０の回転数の算出、比例・積分制御演算によるモータ制御量の算出、並びに、出力（タイマ５２１へのデータロード）等が行われる。
【０１２９】
具体的には、Ａ相エンコーダパルスＥＮＣＡの出力を目標速度に応じて分周マルチプレクサ５２４により、１，２，４，８分周することにより、カウンタインプット端子Ｃ１に割込み入力信号が与えられている。
ここで、１分周時には、第１読み取りセンサユニット９が、エンコーダ１５２のｌパルスによって、０．１１６ｍｍ移動することにより、その速度が割込み間隔によりマイコン５２０の内部で演算される。
そして、この算出された速度データに基づいて比例・積分演算処理により、出力タイマ値が決定される。
また、Ａ相エンコーダパルスＥＮＣＡ、及び、Ｂ相エンコーダパルスＥＮＣＢは、フリップフロップ５２６を介して、マイコン５２０の入力端子ＰＣ３に入力され、両者間の位相差検知に供されて、その位相差によりめくりユニット駆動モータ６０の回転方向が決定される。
つまり、Ａ相エンコーダパルスＥＮＣＡの立上り時における、Ｂ相エンコーダパルスＥＮＣＢの状態がマイコン５２０のポートに入力されることによって、めくりユニット駆動モータ６０の回転方向が判断される。
【０１３０】
次に、めくりユニット駆動モータ６０の速度制御について説明する。
このめくりユニット駆動モータ６Ｏの速度制御はＰＷＭ制御によって行われる。
【０１３１】
先ず、ページめくり読取ユニット１のスキャナ走査時、すなわち、めくりユニット駆動モータ６０の時計方向への回転時には、トランジスタＱ_１をＯＮさせる一方、タイマ５２１からのＰＷＭ出力により、ゲート５２７を介して、トランジスタＱ_４をＯＮ／ＯＦＦさせ、めくりユニット駆動モータ６０の両端子間に電位差を生じさせて、ＰＷＭ信号のデューティ比に応じた速度でこのめくりユニット駆動モータ６０を回転させる。
一方、ページめくり読取ユニット１のリターン時には、上述の場合と逆に、トランシスタＱ３をＯＮさせるとともに、タイマ５２１からのＰＷＭ出力により、ゲート回路５２８を介して、トランジスタＱ_２をＯＮ／ＯＦＦさせ、めくりユニット駆動モータ６０の両端子間に逆向きの電位差を生じさせて、ＰＷＭ信号のデュ一ティ比に応じた速度でこのめくりユニット駆動モータ６０を回転さ
せる。
【０１３２】
【発明の効果】
本発明によれば、ブック原稿を読み取って読み取り頁の画像を形成し、ブック原稿の頁をめくるブック原稿の読み取り装置において、見開きブック原稿の画像形成開始頁として左頁と右頁のいずれかを指示する頁入力手段と、見開きブック原稿を読み取って前記頁入力手段により指示された画像形成開始頁から読み取り画像を形成する画像形成手段とを備えたので、ブック原稿の頁の配置や章の配置によらずにブック原稿を所望の頁から複写することができる。
【図面の簡単な説明】
【図１】本発明を実施したマルチ・ファンクション・ドキュメント・スキャナ（ＭＦＤＳ）の概略断面図である。
【図２】上記ＭＦＤＳの駆動系の概略横断面図である。
【図３】上記ＭＦＤＳの駆動系の概略平面図である。
【図４】上記ＭＦＤＳにおけるページめくり読取ユニットの端部の斜視図である。
【図５】上記ページめくり読取ユニットを構成するローラの支持構造を示すローラ端部の断面図である。
【図６】第 上記ＭＦＤＳにおける搬送部ロック装置のロック解除態様を示す側面図である。
【図７】上記搬送部ロック装置のロック開始作動態様を示す側面図である。
【図８】上記搬送部ロック装置のロック完了態様を示す側面図である。
【図９】上記ＭＦＤＳが搭載されたプリン夕の外観を示す斜視図である。
【図１０】上記ＭＦＤＳが搭載されたプリンタの搬送部開放時の外観を示す斜視図である。
【図１１】上記ページめくり読取ユニット内に配設された第１読み取りセンサユニットの端部付近の斜視図である。
【図１２】上記第１読み取りセンサコニットの端部付近の側面図である。
【図１３】上記第１読み取りセンサユニットの端部の支持構造を示す部分拡大断面図である。
【図１４】上記ページめくり読取ユニットのめくりローラ２の奥側の側面図である。
【図１５】上記ＭＦＤＳにおける原稿載置面の中央基準位置決め部の構造を示す断面図である。
【図１６】上記ＭＦＤＳにおける操作表示ボードの平面図である。
【図１７】上記プリンタの概略断面図である。
【図１８】上記プリンタの書込部の平面図である。
【図１９】上記プリンタの転写紙搬送経路を切り換える切換爪の作動態様図である。
【図２０】上記ペーシめくり読取ユニットの概略断面図である。
【図２１】上記第１読み取りセンサユニットの構成を示す断面図である。
【図２２】上記ＭＦＤＳの作動態様を示す概略断面図である。
【図２３】上記ＭＦＤＳにおけるめくり搬送ベルトの説明図である。
【図２４】上記めくり搬送ベルトのページめくり動作を示す部分斜視図である。
【図２５】上記めくり搬送ベルトの搬送力のピッチ特性を示す線図である。
【図２６】上記めくり搬送ベルトの吸着力のピッチ特性を示す線図である。
【図２７】上記めくり搬送ベルトの搬送力の印加電圧特性を示す線図である。
【図２８】上記めくり搬送ベルトの吸着力の印加電圧特性を示す線図である。
【図２９】上記ＭＦＤＳの電装ブロック図である。
【図３０】上記ＭＦＤＳのブック原稿読み取りモード動作時のモード遷移図である。
【図３１】上記ＭＦＤＳのシート原稿読み取りモード動作時のモード遷移図である。
【図３２】上記各モードの切り換え動作を示すフローチャートである。
【図３３】上記ブック原稿読み取りモードの動作を示すフローチャートである。
【図３４】ブック原稿読み取りモードにおける見開き２ページ連続読み取りモードの動作を示すタイミングチャートである。
【図３５】ブック原稿読み取りモードにおける見開き１ページ区切り読み取りモードの動作を示すタイミングチャートである。
【図３６】上記見開き１ページ区切り読み取りモードにおいてブック原稿の右ページから読み取るようにセットした場合の動作を示すタイミングチャートである。
【図３７】上記見開き１ページ区切り読み取りモードにおいて読み取られたデータの転送タイミングを遅延させる回路のブロック図である。
【図３８】上記見開き１ページ区切り読み取りモードにおいて読み取られたデータの転送タイミングを遅延させる回路の動作を示すタイミングチャートである。
【図３９】上記見開き１ページ区切り読み取りモードにおける両面モードの動作を示すタイミングチャートである。
【図４０】上記シート原稿読み取りモードにおけるシート原稿スルーモードの切り換え動作を示すフローチャートである。
【図４１】上記シート原稿スルーモードにおける片面読み取りモードの動作を示すフローチャートである。
【図４２】上記片面読み取りモードの動作を示すタイミングチャートである。
【図４３】上記シート原稿スルーモードにおける同一位置読み取りモードの動作を示すフローチャートである。
【図４４】上記同一位置読み取りモードの動作を示すタイミングチャートである。
【図４５】上記シート原稿スルーモードにおける別位置読み取りモードの動作を示すフローチャートである。
【図４６】上記別位置読み取りモードの動作を示すタイミングチャートである。
【図４７】上記シート原稿読み取りモードにおけるシート原稿スキャンモードの動作を示すフローチャートである。
【図４８】上記シート原稿スキャンモードの動作を示すタイミングチャートである。
【図４９】上記シート原稿読み取りモードにおけるシート原稿手動開閉モードの動作を示すフローチャートである。
【図５０】上記シート原稿手動開閉モードの動作を示すタイミングチャートである。
【図５１】上記ページめくり読取ユニットの走査制御回路図である。
【符号の説明】
Ａ…マルチ・ファンクション・ドキュメント・スキャナ（ＭＦＤＳ）
１…ページめくり読取ユニット
１−Ａ…ホームポジション位置
１−Ｃ…エンドポジション位置
８…めくり搬送ベルト
９…めくり搬送ベルト、
１４…第２読み取りセンサユニット
２４…中央基準位置決め部
５２…めくりユニット駆動ベルト
６０…めくりユニット駆動モータ
６１…めくり搬送ベルト駆動モータ
９２…ブック原稿
２００…シート原稿、
３００…プリンタ
３１０…メイン制御ボード
１１…めくり搬送ベルト駆動制御ボード
３１２…めくりユニット駆動制御ボード
１３…操作表示ボード
３１４…第１画像処理ボード
３１７…第２画像処理ボード[0001]
[Industrial applications]
The present invention relates to a book document reading apparatus such as a copier and a facsimile having a page turning function of a book document.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a copying apparatus starts a copying operation for copying an original by operating a start key, counts the number of copies one by one, and continuously performs the copying operation until the count value reaches a set value. Further, the copying apparatus reads two originals in two scans by operating the start key once for two originals set side by side on the original platen, and reads the read images on two transfer papers. Some pages have a continuous page copy mode in which each page is separately copied. Both double-page pages of a document can be copied by operating the start key once. Further, although a page turning apparatus for turning pages of a book manuscript has been proposed, there is no apparatus which automatically turns a page of a book manuscript, reads an image of a double-page spread, and forms the read image on transfer paper. Further, there is no copying apparatus which designates a page to be copied of a book document, reads an image of the page, and forms the read image on transfer paper. The document reading device automatically reads sheet documents set on the platen one by one, and reads both facing pages of a book placed on the platen at a time. It is not possible to turn a page and read the image of the facing page.
[0003]
[Problems to be solved by the invention]
Generally, published books and books are bound with double-sided printed matter, and the number of double-sided printed matter is large. In an office, there is a general stapler or a stapled double-sided document such as a file. Depending on the configuration of the pages, these bindings may have one page beginning with the left page and two pages beginning with the right page. When a part of a bound document is copied as a document, the desired copy start page may be the right page or the left page depending on the arrangement of the chapters of the bound material.
[0004]
However, in the above-described copying apparatus, two documents set side by side on the document table are scanned and read by a single start key operation, and the read images are respectively printed on two transfer papers. Although there is a continuous page copy mode in which copying is performed separately, depending on the arrangement of pages and chapters in the book, only the desired copy pages from the desired copy start page to the desired copy end page cannot be copied. Must be copied. In addition, since the original reading apparatus cannot automatically turn over the pages of a book original and read the image of the double-page spread, only the desired reading pages from the desired reading start page to the desired reading end page are automatically read. Can not read.
[0005]
The present inventionA book original image forming apparatus which can improve the above-mentioned drawbacks and form an image of a desired page without performing useless page image formation of the book original, and a book original reading apparatus which can automatically read a desired page It is intended to provide a device.
[0006]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-mentioned problems.A page input means for reading a book original to form an image of a read page and turning the pages of the book original into a book original reading apparatus; Image forming means for reading a two-page spread book original and forming a read image from the image formation start page designated by the page input means.Configuration.
Further, the present invention has been made in order to solve the above-mentioned problems.In a book document image forming apparatus that reads a book document to form an image of a read page and turns a page of the book document, page input means for designating one of a left page and a right page as an image formation start page of a spread book document. Image forming means for reading a two-page spread book original and forming a read image from the image formation start page designated by the page input means.Configuration.
[0007]
[Action]
According to the present invention,Either the left page or the right page is instructed by the page input means as the image formation start page of the spread book original, and the image forming means reads the spread book original and reads the read image from the image formation start page instructed by the page input means. Form.
[0008]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
However, the configuration and operation of the range that can be clearly recalled from the description of the present specification, and the above and other objects and novel features of the present invention are omitted from illustration and disclosure in order to avoid complication of description. Or simplify it.
[0009]
First, referring to FIG. A configuration around the turn-over transport belt in the document reading apparatus according to the present invention will be described.
FIG. 1 is a schematic sectional view of a multi-function document scanner A (hereinafter, referred to as “MFDS”) embodying the present invention.
In FIG. 1, the turn-over transport belt 8 includes a driving roller 12, a tension roller 13, a first belt supporting roller 97, a second belt supporting roller 98, a third belt supporting roller 99, a fourth belt supporting roller 100, and It is supported by a fifth belt support roller 101.
At this time, the turning-over transport belt 8 transfers the page-turning reading unit 1 via the turning-over roller 2, the first bias roller 3, the first roller 4, the second roller 5, and the pressing roller 6 of the page-turning reading unit 1. It is supported to surround.
The tension roller 13 is pulled to the left in FIG. 1 by the belt tension spring 112 to apply an appropriate tension to the turn-over transport belt 8 and press the original surface of the book original 92.
The belt tension sensor 32 detects the tension of the turning transport belt 8 from the amount of movement of the tension roller 13.
[0010]
On the other hand, a sheet document tray 94 for setting a sheet document 200, a sheet document side guide 93 for adjusting a setting position of the sheet document 200 in a side direction, and a discharged sheet A paper output tray 23 on which the document 200 is placed is provided.
Further, a sheet height sensor 25 for detecting the presence or absence of a set of sheet documents 200 and a sheet feed roller for separating and feeding the sheet documents 200 one by one are provided on a sheet feeding unit 21 (upper right in FIG. 1) of the MFDS. A sheet feed separation 96, a sheet feed separation pad 95, and a sheet feed sensor 26 for measuring a sheet feed timing of the sheet document 200 are provided. Further, a first transfer guide 108 and a second transfer guide 108 forming a transfer path of the sheet document 200 are provided. A guide 109 is provided.
Further, a second bias roller 11 for charging when the sheet document 200 is transported is provided outside the turn-over transport belt 8 slightly to the left of the belt supporting roller 97, and inside the second bias roller 11 is a supporting roller. There is a bias opposing roller 102.
[0011]
At the lower end of the second conveyance guide 109, a conveyance guide claw 115 is provided to assist conveyance of the sheet document 200.
Further, a sixth opposed roller 105 is provided on the fourth belt supporting roller 100, a seventh opposed roller 106 is provided on the fifth belt supporting roller 101, and a discharge roller 107 is provided on the driving roller 12. Each of them is disposed outside the belt 8.
A third conveyance guide 110 that constitutes a conveyance path for the sheet document 200 is provided outside the turning conveyance belt 8 from the third belt support roller 99 to the driving roller 12.
Here, between the second belt support roller 98 and the third belt support roller 99, the document placement surface 116 on the upper surface of the document table 18 is used as a conveyance path for the sheet document 200.
The original placing surface 116 is formed in black so that the leading end of the book original 92 can be easily detected when the size of the book original 92 is detected by pre-scanning.
On the other hand, in the paper discharge unit 22 of the MFDS at the upper left in FIG. 1, a paper discharge sensor 28 is provided in front of the paper discharge roller 107 to detect the presence or absence of a jam when the sheet document 200 is discharged.
A discharge separation claw 111 is formed below the discharge port 117 of the discharge unit 22 to assist the smooth discharge of the sheet document 200.
[0012]
On the document table 18 of the MFDS, a fourth opposing roller 103 is provided below the second belt supporting roller 98, and a fifth opposing roller 104 is provided below the third belt supporting roller 99. When the turning reading unit 1 is at the home position 1-A, the first opposing roller 15 is located below the turning roller 2, the second opposing roller 16 is located below the pressing roller 6, and the first reading sensor unit 9 is located. The second reading sensor units 14 are provided on the lower side, respectively.
When the page turning reading unit 1 is at the end position position (stop position of the page turning reading unit 1 in the reading mode of the sheet document 200) 1-C, a third reading sensor unit 9 is provided below the first reading sensor unit 9. A book size upper limit sensor 33 is disposed below the opposing roller 17 and below the turning roller 2.
Further, a central reference positioning portion 24 for determining a mounting position of the book original 92 is formed at the center of the original mounting surface 116.
The center reference positioning portion 24 has a center positioning plate 113 that contacts the back of the book document 92 in a state where the book document 92 is placed, and a center positioning plate that gives an ascending habit to the center positioning plate 113. A spring 114 and a book original sensor 27 for detecting the amount of downward displacement of the center positioning plate 113 when the book original 92 is placed are provided respectively.
A stand 91 for supporting the MFDS substantially horizontally is provided below the document table 18 configured as described above.
On the other hand, on both sides of a portion of the transport unit 19 that is in contact with the document table 18, a transport unit locking device 140 having a built-in transport unit lock sensor 31 is provided to open and close the transport unit 19 and the document table 18. Detected.
As described above, the MFDS is configured as a document reading apparatus having both an automatic document feeding / reading function of the sheet document 200 and a book document reading and automatic page turning function.
[0013]
Next, a configuration of a drive system in the document reading apparatus will be described with reference to FIGS.
FIG. 2 is a schematic cross-sectional view of a drive system of the MFDS.
FIG. 3 is a schematic plan view of a drive system of the MFDS.
FIG. 4 is a perspective view of an end of the page turning reading unit 1.
2 to 4, in the page turning reading unit 1, the scanning pipe 51 of the turning unit driving plate 49 is fitted to a pair of scanning rods 50 which are horizontally set in parallel to the front side and the back side of the MFDS. By being inserted, it is slidably supported along the left and right direction of the MFDS.
The respective ends of the scanning rods 50 are fixed to the transport unit right side plate 58 and the transport unit left side plate 59 of the MFDS.
[0014]
As shown in FIG. 3, a first shaft 64 and a second shaft 65 are rotatably supported between the transport unit front side plate 56 and the transport unit rear side plate 57 in a rotating white space.
A drive pulley 62 and a driven pulley 63 are fixed to the first shaft 64 and the second shaft 65, respectively, on the front side and the rear side, respectively. Two turning unit drive belts 52 are suspended from the pair 63.
As shown in FIGS. 3 and 4, the page turning reading unit 1 uses a driving belt fixing plate 54 and a driving belt fixing screw 55 at a driving belt fixing portion 53 of a turning unit driving plate 49 to turn the turning unit drive belt. 52, and is driven by the rotation of the turning unit drive belt 52.
In addition, a first gear 66 is fixed to the first shaft 64 on the side thereof with the transport unit rear plate 57 interposed therebetween, and the first gear 66 is fixed to the output shaft of the turning unit drive motor 60. The rotation of the turning unit drive motor 60 is transmitted by meshing with the second gear 67, and the driving pulley 62, the turning unit drive belt 52, the driven pulley 63, and the page turning reading unit 1 are respectively driven.
[0015]
On the other hand, as shown in FIG. 3, a third shaft 121 coaxially fixed to the fourth belt supporting roller 100, a fourth shaft 122 coaxially fixed to the drive roller 12, and a seventh shaft 121 coaxially fixed to the paper feed roller 96. An eighth shaft 126 coaxially fixed to the shaft 125 and the first belt support roller 97 is rotatably supported between the transport unit front side plate 56 and the transport unit rear side plate 57, respectively.
The third gear 68 is fixed to the fourth shaft 122 on the rear side with the transport unit rear side plate 57 interposed therebetween.
Further, the fourth gear 69 and the fifth gear 73 are coaxially fixed and rotatably supported by the shaft.
Further, the sixth gear 74 fixed to the output shaft of the turning and conveying belt driving motor 61 meshes with the fifth gear 73, and the fourth gear 69 and the third gear 68 mesh with each other. Are sequentially transmitted and the drive roller 12 is driven to turn the transport belt 8.
[0016]
Also, as shown in FIGS. 2 and 3, the eighth shaft 126 has a second paper feed pulley 130 at the back of the transport unit rear plate 57, and the seventh shaft 125 has a transport unit rear plate 57. A first paper feeding burley 129 is fixed to a rear side of the paper feeding clutch 128 via a paper feeding clutch 128, and a paper feeding drive belt 127 is suspended between the second paper feeding pulley 130 and the first paper feeding pulley 129. ing.
As a result, the rotation of the first belt support roller 97 rotated by the rotation of the turn-over transport belt 8 sequentially causes the eighth shaft 126, the second paper feed bury 130, the paper feed drive belt 127, and the first paper feed pulley 129. This is transmitted to the input side of the paper feed clutch 128.
Further, the paper feed clutch 128 is operated by the control signal sent from the main control board 310 (see FIG. 5), and the seventh shaft 125 and the paper feed roller 96 are driven.
On the other hand, the first opposing roller 15, the second opposing roller 16, and the third opposing roller 17 shown in FIG. 1 are synchronized with the turning-over conveyance belt 8 by a drive transmission mechanism (not shown) and have the same peripheral speed. , Respectively.
[0017]
Next, the configuration of the page turning reading unit 1 will be described with reference to FIGS.
1 to 4, the first turning unit side plate 40 and the second turning unit side plate 41 are arranged opposite to each other at a position sandwiching the turning transport belt 8, and these first turning unit side plates 40 are provided. And the second turning unit side plate 41, the turning roller 2, the first bias roller 3, the first roller 4, the second roller 5, and the pressing roller 6 are rotatably supported.
Each of these rollers has the same support structure.
Therefore, the first roller 4 will be described as an example. As shown in FIG. 5, the first roller 4 has a first turning unit side plate 40 and a second turning unit side plate 41, both ends of which are fixed to each other. The fifth shaft 123 is inserted into the hollow portion of the first roller 4 formed of a hollow shaft, and both ends of the first roller 4 are supported by a pair of bearings 131 disposed on the fifth shaft 123. Thereby, the fifth shaft 123 is rotatably supported by the fifth shaft 123.
Here, the turning roller 2, the first bias roller 3, the first roller 4, the second roller 5, and the press roller 6 do not rotate by themselves, but are rotated only by the rotation of the flip transport belt 8. .
In addition, outside the first turning unit side plate 40 and the second turning unit side plate 41, a rotation support rod 42 (same as the surface side) is provided at an extended position in the longitudinal direction of the first reading sensor unit 9 shown in FIG. ) Are rotatably supported.
Therefore, the support structure of only one side of the rotation support rod 42 will be described. As shown in FIG. 4, the rotation support rod 42 includes a sliding pipe 43, a second spring retaining claw 48, and an upper limit detection unit 76. And is configured integrally.
In FIG. 4, the inclination correcting spring 44 is formed of a torsion coil spring, one end of which is fixed to the rotation supporting rod 42 and the other is fixed to the first turning unit side plate 40, respectively.
When the inclination correcting spring 44 is in its natural state, that is, in a state where no external force is applied to the inclination correcting spring 44, the axial direction of the sliding pipe 43 (the vertical direction in FIG. 4) and the first reading sensor unit 9 (The moving direction of the first reading sensor unit 9 with respect to the first turning unit side plate 40 and the second turning unit side plate 41 (to be described in detail later)).
Thereby, when the first turning unit side plate 40 and the second turning unit side plate 41 rotate integrally with each other about each of the rotation support rods 42, the first turning unit side plate 40 and the A rotational force is applied to the second turning unit side plate 41 so as to always return to the initial state, and the inclination of the first turning unit side plate 40 and the second turning unit side plate 41 is corrected as appropriate.
Further, as shown in FIG. 4, the sliding pipe 43 is configured to smoothly slide with respect to the sliding support rod 46.
The upper end of the slide support rod 46 is fixed to the upper rod support plate 70, and the lower end of the slide support rod 46 is fixed to the lower rod support plate 71.
A first spring stopper 47 is formed on the upper rod support plate 70, and a second spring stopper 48 is formed on the upper part of the sliding pipe 43. Both ends of the turning unit upper and lower springs 45 mounted between the sliding pipe 43 and the upper rod support plate 70 are locked by the spring stopper claws 48, respectively.
[0018]
Here, the sliding pipe 43 is in contact with the lower rod support plate 71 in a normal state. Along the dynamic support rod 46, it slides upward in FIG.
At this time, the sliding force for returning to the above-mentioned normal state is acting on the sliding pipe 43 by the elastic force of the turning unit vertical spring 45, which constantly presses the second spring retaining claw 48 downward.
Further, the sliding range of the sliding pipe 43 in the upward direction is determined in a state where the scan cutoff sensor 34 arranged on the turning unit driving plate 49 detects the upper limit detecting unit 76 provided on the sliding pipe 43. The sliding position above the sliding pipe 43 is set to be the limit position.
[0019]
On the other hand, as shown in FIG. 4, the turning unit drive plate 49 includes an upper rod support plate 70, a lower rod support plate 71, a first spring stopper nail 47, a scanning pipe 51, a drive belt fixing unit 53, and a home detection. It is formed integrally with the filler 75.
The drive belt fixing portion 53 of the turning unit driving plate 49 is fixed to the turning unit driving belt 52 by the driving belt fixing plate 54 and the driving belt fixing screw 55 as described above.
Further, the scanning pipe 51 of the turning unit driving plate 49 is fitted so as to slide smoothly on the scanning rod 50.
As a result, as described above, the turning unit drive belt 52 is driven, and when the page turning reading unit 1 reaches the home position 1-A, the scanning pipe is detected by the home sensor 30 shown in FIG. It is configured such that 51 home detection fillers 75 are detected.
[0020]
Next, with reference to FIGS. 6 to 8, a description will be given of the configuration of the transport unit locking device in the document reading device.
6 to 8 are schematic diagrams showing one configuration of the transport unit locking device 140 (the same configuration on both sides) disposed on both sides of the MFDS.
The transport unit locking device 140 includes a lock release solenoid 132, a lock rod 134, and the like.
6 to 8, the unlocking solenoid 132 is connected to one end of the unlocking solenoid arm 133.
The other end of the lock release solenoid arm 133 is rotatably supported by one end of the lock rod 134 in a rotating manner.
An electromagnetic lock 141 is arranged on the side of the arm facing the unlocking solenoid arm 133 of the lock rod 134.
At the other end of the lock rod 134, a lock claw 134a, which is provided with a lock release solenoid arm 133 and is bent in a key claw shape toward the side, is formed.
[0021]
The lock rod 134 is rotatably supported by a rotating part 136, and the upper part of the rotating part 136 is connected to one end of a lock spring 135.
The other end of the lock spring 135 is connected to a part of the transport section 19, thereby giving the lock rod 134 a rotating behavior in the clockwise direction in FIG.
The rotation of the lock rod 134 due to the rotation behavior is prevented at a predetermined angle by a lock claw stopper 137 disposed on the lower left side of the rotation part 136.
On the other hand, on the document table 18 side, a lock pin 139 and a lock section 138 in which the transport section lock sensor 31 is arranged are formed.
[0022]
In FIG. 6, when the transport unit 19 is closed while being pushed down, as shown in FIG. Is rotated counterclockwise about the rotation axis.
When the transport unit 19 is further closed from this state, the lock claw 134a of the lock rod 134 is hooked on the lock pin 139, and the transport unit 19 is fixed to the document table 18, as shown in FIG.
Further, at the time of the locking operation of the transport section 19, the transport section lock sensor 31 is operated by the lock claw 134a of the lock rod 134.
The unlocking of the transport unit 19 is executed by pressing the open key 620 of the operation display board 313 shown in FIG.
That is, when the open key 620 of the operation display board 313 is depressed, the lock release solenoid 132 is operated, and the lock rod 134 rotates counterclockwise about the rotation part 136 as a rotation axis. The lock claw 134a is released, and the transport unit 19 is opened upward by a transport unit opening / closing spring (not shown) (see FIG. 10).
However, the open key 620 is programmed so that it does not operate (does not accept an input) during a series of page turning scans of the book original 92, during scanning, and during conveyance of the sheet original 200. .
When the open key 620 does not receive an input, the electromagnetic lock 141 is actuated, and the electromagnetic lock 141 allows the lock rod 134 to be engaged with the lock pin 139 and the lock rod 134 to be locked. The rotation is restricted.
[0023]
The MFDS configured as described above is used, for example, mounted on the upper part of the printer 300 as shown in FIGS. 9 and 10.
FIG. 10 shows a state in which the transport section 19 of the MFDS is opened as described above.
[0024]
Next, the configuration of the first reading sensor unit 9 inside the page turning reading unit 1 in this document reading apparatus will be described with reference to FIGS. 11 to 13. FIG.
11 is a perspective view of the vicinity of the end of the first reading sensor unit 9, FIG. 12 is a side view of the vicinity of the end of the first reading sensor unit 9, and FIG. It is a detailed sectional view.
Since both ends of the first reading sensor unit 9 have the same configuration, only the configuration of one of them will be described here.
As shown in FIG. 11, the upper part of the first reading sensor unit 9 is covered by a reading sensor bracket 146 formed in a U-shape, and the first reading sensor unit 9 is vertically moved with respect to the reading sensor bracket 146. It is arranged movably.
[0025]
The reading sensor bracket 146 is integrally formed with the page turning reading unit 1 by fixing both ends thereof to the first turning unit side plate 40 and the second turning unit side plate 41.
A reading sensor stud 148 is fixed downward slightly inside the end of the reading sensor bracket 146.
The lower end of the reading sensor stud 148 is fitted to a boss 149 formed at the end of the first reading sensor unit 9, as shown in FIG.
[0026]
Thus, the first reading sensor unit 9 is supported by the reading sensor bracket 146 via the reading sensor stud 148 so as to be vertically movable.
[0027]
Here, the reading sensor stud 148 and the boss 149 are configured so as not to be disengaged by a flange-shaped hook formed at the lower end of the reading sensor stud 148.
[0028]
A reading sensor spring 147 is mounted between the base of the reading sensor stud 148 of the reading sensor bracket 146 and the base of the boss 149 of the first reading sensor unit 9. The extension force urges the first reading sensor unit 9 to be displaced downward.
Accordingly, the first reading sensor unit 9 is always located at the lowermost portion of the page turning reading unit 1 and, when receiving an external force due to, for example, unevenness on the surface of the book document 92, opposes the external force. Instead, the book original 92 is moved up and down smoothly along the irregularities on the surface of the book original 92.
As shown in FIG. 11, a read sensor release solenoid 150 is attached to an end of the first read sensor unit 9 via a read sensor release solenoid arm 151.
As shown in FIG. 12, the reading sensor release solenoid 150 is fixed to the first turning unit side plate 40, and the page turning reading unit 1 is moved without performing the original reading operation by the first reading sensor unit 9. For example, at the time of page turning operation, at the time of idle scanning of a non-read page, and at the time of returning to the sheet original scan mode, the reading sensor release solenoid 150 is operated.
When the reading sensor release solenoid 150 is operated, the first reading sensor unit 9 is moved upward against the elasticity of the reading sensor sprink 147, and the original scanning surface is retracted (separated) from the surface of the original. .
The first reading sensor unit 9 uses a signal of the encoder 152 generated by the rotation of the turning roller 2 as a reference signal for reading the image.
The turning roller 2 and the encoder 152 are configured as shown in FIG.
[0029]
FIG. 14 shows a side view of the back side of the turning roller 2.
In FIG. 14, a crown-shaped filler 153 is disposed at the end of the turning roller 2 on the far side.
[0030]
The filler 153 is formed by forming equally spaced slits of the same width on the circumference.
The encoder 152 is fixed to the second turning unit side plate 41 so as to sandwich the filler 153 up and down.
Thus, the encoder 152 generates a reference signal for image reading of the first reading sensor unit 9 by periodically blocking the detection optical path of the encoder 152 by the filler 153 according to the rotation of the turning roller 2.
[0031]
On the other hand, the positioning of the book document 92 with respect to the document table 18 is performed by the center reference positioning unit 24.
FIG. 15 shows a detailed cross-sectional view of the center reference positioning portion 24.
The center reference positioning section 24 is a reference position at the time of reading scanning of the book document 92 and at the time of scanning of turning pages.
The center reference positioning unit 24 is configured in a campus formed at the center of the document placing surface 116.
A center positioning plate 113 is fitted into the groove so as to be able to move up and down on the document placing surface 116.
The center positioning plate 113 is always given an ascending habit by a center positioning spring 114 disposed below the center positioning plate 113.
The upward movement of the center positioning plate 113 due to this habit is prevented by the stop of the stop claw 119 of the center positioning plate 113 coming into contact with the stop 118 formed in the green portion of the groove of the document placing surface 116. It is stopped at the position shown by the broken line in FIG.
The setting of the book document 92 on the document placing surface 116 is performed by placing the spine (binding portion) of the book document 92 on the center positioning plate 113 in the groove.
[0032]
That is, when the spine (binding portion) of the book document 92 is placed on the center positioning plate 113 in the groove, the weight of the book document 92 pushes the center positioning plate 113 downward.
As a result, the book document sensor 27 arranged on the side of the document mounting surface 116 in the groove detects the movement of the center positioning plate 113, and the set of the book document 92 is recognized.
[0033]
An operation display board 313 of the MFDS is arranged on the entire surface of the document table 18 (see FIGS. 9 and 10).
The operation display board 313 is provided with a number of input keys as shown in FIG.
Hereinafter, the functions of these input keys will be described in order.
The start key 600 is pressed when instructing to start reading a document.
An enter key 601 is pressed to confirm the input when inputting a numeric key or selecting input on the liquid crystal display panel.
A numeric keypad 602 is used to set the number of prints of a document, the number of pages turned, and the like.
A reading start page selection key 603 is a key for selecting which of the “left” and “right” pages to start reading toward the book document 92 in the book document reading mode. Each time the button is pressed, the reading start page of the book document 92 is switched between left and right.
[0034]
The read start page at the time of initial setting of this key is set to the “left” page, and whether the read start page selected by this key is the left or right of the book original 92 is indicated by two read start pages. This is indicated by which of the LEDs 631 is lit.
The read total page setting key 606 is pressed to set the total number of pages to be read when inputting the number of pages to be turned in the book original reading mode.
The total number of read pages of the book original 92 is determined by pressing the read total page setting key 606, inputting the number of pages with the ten keys 602, and then pressing the enter key 601. The image is displayed on the liquid crystal display panel 630.
The book size selection key 607 is pressed to select either the “automatic book size recognition mode” or the “book size key input mode” in the book original reading mode.
Also, each time this key is pressed once, the display of the book size display LED 632 is switched in the order of “automatic”, “fixed form”, and “unfixed form (mm input)”, and the book size display LED 632 is displayed. Mode is selected.
[0035]
At the time of initial setting of the book size selection key 607, the display of the book size display LED 632 is "automatic", and "automatic book size recognition mode" is selected.
[0036]
In the book size key input mode, there are a "fixed form" and an "unfixed form (mm input)". By selecting the "fixed form" only when the book size is A5, B5, A4, It becomes possible to input a book size using the fixed form book size selection key 619.
Each time the standard book size selection key 619 is pressed once, the display of the standard book size display LED 633 is switched in the order of "A5" / "B5" / "A4", and the selected book size is displayed and recognized. Is done.
[0037]
When the standard book size selection key 619 is initially set, the display of the standard book size display LED 633 is “A4”.
However, the book size here refers to the size of the cover of the book document 92.
Here, when the book document 92 has a size other than the standard book size described above, “undefined (mm input)” is selected with the book size selection key 607, and the ten key 602 is used to set the vertical size of the set book document 92. After inputting the size and the horizontal size (in units of mm), the user depresses an enter key 601 to determine the book size.
When the size of the book document 92 is determined in this way, the input size value is displayed on the liquid crystal display panel 630.
[0038]
The book binding section mask area setting key 608 is used to set the non-read area (mask area) from the center of the center reference positioning section 24 to "left (one)" and "right (10)" in the book original reading mode. )) Is set.
[0039]
That is, when forming a mask area in the book binding portion of the book original 92, first, the book binding section mask area setting key 608 is used to set which of the left and right pages of the book original 92 to form a mask area. After inputting the length (in mm) of the set “left mask area (−)” or “right mask area (+)” by using the ten keys 602, the input value is determined by the enter key 601. .
[0040]
When the mask area of the book document 92 is determined in this way, the input value is displayed on the liquid crystal display panel 630.
The value of the mask area at the time of initial setting of the book binding section mask area setting key 608 is “± 10 mm”.
A reading area selection key 609 is used to set the reading area of the book original 92 to one of “single page (left)”, “single page (right)”, and “both pages” in the book original reading mode. Pressed when selecting.
[0041]
Each time the reading area selection key 609 is pressed once, the display of the reading area display LED 636 is switched in the order of “single page (left)”, “single page (right)”, and “both pages” and is selected. The reading area is displayed and recognized.
When the reading area selection key 609 is initially set, the display of the reading area display LED 636 is “both pages”.
Here, when “single page (left)” is selected, reading scanning of only the left page toward the book document 92 is performed, and reading scanning of the right page is not performed. If “one page (right)” is selected, reading scanning of only the right page toward the book document 92 is performed, and reading scanning of the left page is not performed.
The double-page spread key 610 is pressed to instruct to print out the read document information at the same magnification in the “two-page continuous reading mode” of the book document reading mode and the “double-sided mode”. Is done.
The double-page spread reduction key 611 is used to instruct to print out the read document information at a reduced magnification in the “two-page spread continuous reading mode” of the book document reading mode and the “double-sided mode”. Pressed.
At this time, the setting of the reduction ratio of the document information is performed by operating the print scaling key 614.
The reference reduction ratio at the time of initial setting of the two-page spread continuous reduction key 611 is set to “document size × 0.71 (A3 → A4 / B4 → B5)”.
[0042]
A double-sided mode selection key 612 is used to select which side should be turned upside down and which side should be printed when the book original reading mode is set to the “double-sided mode” of the “spread one page separation reading mode”. , Is pressed to select from three duplex modes, “spread duplex mode”, “original duplex mode”, and “sequential duplex mode”.
[0043]
Each time the duplex mode selection key 612 is pressed once, the display of the duplex mode display LED 634 is switched in the order of “spread duplex mode”, “original duplex mode”, and “sequential duplex mode”, and the selected reading area is changed. It is displayed and recognized.
When the duplex mode selection key 612 is initially set, the display of the duplex mode display LED 634 is "Original duplex mode".
Here, when the “spread double-sided mode” is selected, two-sided printing is executed with the left page out of the left and right pages and the right page out of the left and right pages of the spread hook original 92.
At this time, when the reading start page of the book document 92 is set to “right” by the reading start page selection key 603, the first print of the first page is a single-sided print.
If the "original double-sided mode" is selected, the right page is turned out of the left and right pages of the opened book original 92, and the next page turned by the page turning operation is turned on. The two-sided printing is executed with the left page turned upside down.
[0044]
In other words, in the “original double-sided mode”, the book is printed in exactly the same manner as the binding of the book original 92.
At this time, when the reading start page of the book document 92 is set to “right” by the reading start page selection key 603, the first print is performed on one side in the same manner as in the case of the “double-sided spread mode”. It becomes a print.
Further, when the “sequential double-sided mode” is selected, the page set by the reading start page selection key 603 out of the left and right pages of the opened book original 92 is turned into a table, and the page turning operation is performed. With the next page turned upside down, double-sided printing is performed in the reading order.
[0045]
The double-page spread high-speed print setting key 613 slows down the operation of the page turning reading unit 1 near the binding portion of the book document 92 in the “single-sided mode” of the “two-page spread continuous reading mode” of the book document reading mode. Alternatively, the reading operation is continuously performed without stopping, and the button is pressed to instruct continuous printing of both left and right pages of the book document 92.
A print scaling key 614 is a key for setting a scaling factor when a read image is scaled and printed.
When the print magnification key 614 is pressed, a preset magnification is displayed on the liquid product display panel 630.
Here, the scaling ratio is determined by moving the cursor to a desired scaling ratio with the cursor movement key 617 and then pressing the enter key 601.
[0046]
The image processing setting key 615 is a key for setting an image processing mode when the read image is processed and printed.
When the image processing setting key 615 is pressed, a preset image processing mode is displayed on the liquid crystal display panel 630.
Here, the image processing mode is determined by moving the cursor to a desired image processing mode with the cursor movement key 617 and then pressing the enter key 601.
[0047]
The mode setting selection key 616 is a key for setting an operation mode of the MFDS.
When the mode setting selection key 616 is pressed, a preset MFDS operation mode is displayed on the liquid crystal display panel 630.
Here, the operation mode of the MFDS is determined by setting the operation mode cursor of the desired MFDS and then pressing the enter key 601.
The cursor movement key 617 is a key for moving a cursor to each selection area displayed on the liquid crystal display panel 630.
[0048]
A read skip page setting key 618 is a key for setting a page to be skipped without performing reading scan in the book document reading mode.
[0049]
In other words, when there is a page among the pages of the book document 92 that the user wants to skip without performing the document reading scan, the user presses the read skip page setting key 618 first. After inputting the number of the page to be skipped (skip page) from the read start page with the ten keys 602, the enter key 601 is depressed to determine the skip page.
The skip page thus input is displayed on the liquid crystal display panel 630.
The standard book size selection key 619 is a key for selecting the book size of the book original 92.
[0050]
As described above, in the book size key input mode, there are “fixed form” and “unfixed form (mm input)”, and “fixed form” is selected only when the book size is A5 / B5 / A4. As a result, the book size can be input using the fixed form book size selection key 619.
Each time the standard book size selection key 619 is pressed once, the display of the standard book size display LED 633 is switched in the order of "A5" / "B5" / "A4", and the selected book size is displayed and recognized. Is done.
When the standard book size selection key 619 is initially set, the display of the standard book size display LED 633 is “A4”.
However, the book size here refers to the size of the cover of the book document 92.
The open key 620 is pressed to open the MFDS transport unit 19. The sheet original set selection key 625 is used to set the original surface of the sheet original 200 set on the original placing surface 116 to “upward” in the “single-side original reading mode” of the “sheet original through mode” in the sheet original reading mode. -A key for selecting one of "downward".
[0051]
Each time the sheet document set selection key 625 is pressed once, the display of the sheet document set display LED 635 is switched in the order of “up” and “down”, and the selected sheet document set surface is displayed and recognized. .
When the sheet original set selection key 625 is initially set, the display of the sheet original set display LED 635 is “upward”.
[0052]
Next, the printer 300 shown in FIGS. 9 and 10 will be described.
FIG. 17 shows a schematic sectional view of the printer 300.
The image information after the image processing is written on the photosensitive drum 170 in the form of a set of light points by raster scanning of laser light in a writing unit of the printer 300.
At this time, a semiconductor laser is used as a laser light source.
FIG. 18 is a plan view of the writing unit of the printer 300.
In FIG. 18, a laser beam emitted from a semiconductor laser 171 is converted into a parallel beam by a collimator lens 172, and is shaped into a beam of a constant shape by an aperture 173.
The shaped beam is incident on the polygon mirror 175 by the first cylinder lens 174 with its sub-scanning direction compressed.
The polygon mirror 175 has an accurate polygonal shape and is rotated by a polygon motor 176 in a certain direction at a certain speed.
The rotation speed of the polygon mirror 175 is determined by the speed of the photosensitive drum 170, the writing density, and the number of surfaces.
The reflected light of the laser light incident on the polygon mifu 175 is deflected by the rotation of the mirror.
The deflected laser light is incident on each of the fθ lenses 177a, 177b, 177c.
Lenses 177a, 177b, and 177c have a function of converting scanning light having a constant angular velocity so as to scan at a constant speed on the photosensitive drum 170. The scanning light is formed so as to have a minimum light spot on the photosensitive drum 170. And a function of correcting the tilt of the image.
The light that has passed through each of the fθ lenses 177a, 177b, and 177c is guided to a synchronization detection sensor 179 by a synchronization detection mirror 178 outside the image area, and after a synchronization signal that outputs a cue signal in the main scanning direction is output. After a certain period of time, one line of image data is output, and thereafter, this is repeated to form one image.
[0053]
On the other hand, a photosensitive layer is applied to the surface of the photosensitive drum 170.
Here, as the photoconductor having sensitivity to the wavelength of 780 nm of the semiconductor laser 171, an organic photoconductor (OPC), α-Si, Se—Te, or the like is known. In the present embodiment, the organic photoconductor is used. I'm using
In general, in the case of laser writing, there are an N / P process in which light is applied to an image portion and a P / P process in which light is applied to a background portion. In the present embodiment, as the laser writing process, light is applied to the image portion. The N / P process is applied.
[0054]
In FIG. 17, the surface of the photosensitive drum 170 is uniformly negatively charged by a scorotron-type charging charger 180 in which the photosensitive drum 170 has an alligator grid.
Next, when the image portion of the negatively charged photosensitive drum 170 is irradiated with a laser beam to lower the potential of the image portion, the surface potential of the photosensitive drum 170 becomes −750-− An electrostatic camellia image having a voltage of 800 V and a potential of the image portion of about -50 V is formed.
The electrostatic latent image is visualized by applying a bias voltage of −500 to −600 V to the developing roller of the developing device 181 and negatively charged toner.
[0055]
The image visualized by the developing device 181 is transferred to a transfer charger 182 which applies a positive potential charge from the back side of the transfer paper onto the paper surface of the transfer paper fed in synchronization with the rotation of the photosensitive drum 170. Is transcribed by the transcription action of
The transfer paper on which this image has been transferred is separated from the surface of the photoconductor drum 170 by being subjected to AC static elimination by a separation charger 183 held integrally with the transfer charger 182.
At this time, the toner remaining on the photoconductor drum 170 without being transferred to the transfer paper is scraped off the surface of the photoconductor drum 170 by the cleaning blade 184, and a tank disposed around the cleaning blade 184. Collected in 185.
Further, the pattern of the potential remaining on the surface of the photosensitive drum 170 is erased by irradiating light with the charge removing lamp 186.
[0056]
A photo sensor 187 is provided immediately downstream of the developing device 181.
The photo sensor 187 includes a light receiving element and a light emitting element, measures the reflection density on the surface of the photosensitive drum 170, and sets the reflection density (toner density after development) to a predetermined reference value or less. When this happens, a toner supply signal for supplying new toner to the developing device 181 is output.
That is, the photosensor 187 writes, for example, a fixed pattern (pure black or halftone dot pattern) at a position corresponding to the reading position of the photosensor 187 by the optical writing unit, and develops the pattern after developing this pattern. The density of the developed image is determined based on the ratio between the light reflectance of the portion and the light reflectance of the photosensitive drum 170 outside the pattern portion. When the density of this image is lower than its reference value, the toner supply signal Is output.
Here, when a new toner supply is insufficient, the photo sensor 187 detects the shortage of the remaining amount of toner by utilizing the point that the developing density does not increase even if the toner supply signal is output. You may comprise so that it may be used also as a sensor.
[0057]
On the other hand, the printer 300 of this embodiment includes a plurality of cassettes 188a and 188b, and is configured to be able to double-side feed a transfer sheet on which an image has been transferred once through a re-feed loop 189.
That is, in FIG. 17, when the start button of the printer 300 is pressed after the predetermined cassette is selected, the selected roller among the paper feeding rollers 190a and 190b of the cassettes 188a and 188b is selected. After being rotated, the transfer paper in the cassette is fed until it hits the nip of the registration roller 191. The registration roller 191 starts rotating at a timing at which the position of the image formed on the photosensitive drum 170 and the position of the transfer paper are synchronized, and conveys the transfer paper toward the surface of the photosensitive drum 170. I do.
As a result, the transfer paper is transferred with an image as described above, is separated from the surface of the photosensitive drum 170, and is suction-conveyed to the separation conveyance unit 192, where the heat roller 193 and the pressure roller The toner transferred to the paper surface is fixed by the fixing roller 194.
During normal printing, the transfer paper on which the toner is fixed faces the switching claw 195 at the position shown in FIG. 19A, and the switching claw 195 causes the paper discharge tray 169 to pass through the paper discharge port of the printer 300. Is discharged on top.
Here, when the print mode of the printer 300 is the “double-sided mode”, the switching claw 195 is switched to the position shown in FIG. 19B, and is directed toward the double-sided conveyance path formed on the left side of the printer 300. The transfer paper is transported.
[0058]
The transfer paper passes through the reversing guide pawl 196 and is once guided onto the reversing guide tray 197, and then the reversing guide pawl 196 is switched, and the reversing guide roller 198 is reversely rotated (reversed). As a result, the picture is fed through the re-feeding loop 189 again until it comes into contact with the nip of the registration roller 191.
The transfer paper re-fed in this way is transferred and fixed to the toner image formed on the photosensitive drum 170 in the same manner as in the normal printing described above, and thereafter, FIG. The paper is discharged onto the paper discharge tray 169 via the switching claw 195 switched to the initial state shown by.
Here, when the “back side discharge mode” is set, in which the transfer sheet is discharged with the image fixing surface of the transfer sheet at the time of discharge in the single-sided print mode facing the stacking surface of the discharge tray 169, As in the case of the above-mentioned "double-sided mode", the switching claw 195 is switched to the position shown in FIG. 19 (b), and the transfer sheet is once conveyed toward the double-sided conveyance path without being directly discharged. You.
Then, immediately after the rear end of the transfer sheet passes through the switching claw 195, the switching claw 195 is switched to the position shown in FIG. 19C and the rotation direction of the switchback roller 199 is reversed. The transfer paper guided to the two-sided conveyance path is conveyed by switchback, and is discharged onto the paper discharge tray 169 through the paper discharge port of the printer 300.
In the “back side discharge mode”, the transfer paper printed on one side is discharged onto the discharge tray 169 with its image fixing surface facing the mounting surface of the discharge tray 169, so that the reading order of the original is The transfer paper is discharged in the same order as the print page order of the transfer paper.
[0059]
By the way, as described with reference to FIG. 4, the page turning reading unit 1 is provided between the first turning unit side plate 40 and the second turning unit side plate 41, and the turning roller 2, the first roller 4, the second The roller 5, the pressing roller 6, and the first bias roller 3 are each rotatably disposed.
As shown in FIG. 20, a turning transport belt 8 is stretched over the turning roller 2, the first roller 4, the second roller 5, the pressing roller 6, and the first bias roller 3.
The first bias roller 3 is connected to a first high-voltage power supply 320, and is configured such that AC voltages of respective frequencies for suction and static elimination are respectively supplied from two ports.
Further, inside the page turning reading unit 1, between the turning roller 2 and the first reading sensor unit 9, a turning guide 10 is further provided. The page storage sections 7 are respectively provided along the peripheral surface.
A page turning sensor 29 including a photo sensor and the like for detecting an error at the time of turning the page is disposed in the page storage unit 7.
This page turning sensor 29 may be arranged on the page turning guide 10.
Further, the first reading sensor unit 9 is disposed between the turning roller 2 and the pressing roller 6 as described with reference to FIG.
The first reading sensor unit 9 is attached to the page turning reading unit 1 so as to be able to move up and down by about 3 mm, and when reading a document, the reading sensor sprink 147 pushes down the book sensor 92 and the book document 92 or It is configured to be in close contact with the document surface of the sheet document 200.
As shown in FIG. 21, the first reading sensor unit 9 includes an LED 316 as an illumination system for the original, an RMLA 81 (roof mirror lens array) as an imaging system for the original image, and an imaged original. Is provided with a Si equal-magnification sensor 315 as a photoelectric conversion system for converting the light image of FIG.
[0060]
Document reading by the first reading sensor unit 9 is performed as follows.
In FIG. 21, first, light emitted from the LED 316 is condensed on the original surface by the bar lens 83, and the original is illuminated.
Next, the reflected light from the document surface is reflected by the optical path separating mirror 84, passes through the LA 85 (lens array) and the RMA 86 (roof mirror array), and is reflected again by the optical path separating mirror 84.
The image light of the document reflected by the optical path separating mirror 84 is imaged on the light receiving surface of the Si equal magnification sensor 315, and the image information imaged by the Si equal magnification sensor 315 is converted into an electric signal. Converted and read.
Next, a basic page turning operation in the embodiment of the present invention configured as described above will be described.
[0061]
First, reading of a document in this embodiment is performed in the following procedure.
When the original is a book original 92, the operator presses the open key 620 of the operation display board 313 to open the transport unit 19 upward as shown in FIG. The binding section (back) is set, and the transport section 19 is closed as shown in FIG. 9 in a state where the reading start page of the book document 92 is opened upward.
In this state, after operating the respective keys of the operation display board 313 to set the reading conditions of the book document 92, the MFDS is started by pressing the start key 600.
As a result, as shown in FIG. 1, the turning unit drive belt 52 is driven by the turning unit drive motor 60, and the page turning reading unit 1 moves rightward from the leftmost home position position 1-A. The first reading sensor unit 9 starts reading the document information of the book document 92 by moving the page turning reading unit 1.
At this time, the rotation of the turning-over transport belt 8 is stopped, and the document surface of the opened book document 92 is pressed from above.
Further, as described above, the page turning reading unit 1 is rotated about the rotation supporting rod 42 as a fulcrum, and the sliding pipe 43 integrated therewith moves up and down along the sliding supporting rod 46. As a result, the first reading sensor unit 9 is moved along the document surface of the book document 92 while keeping the first reading sensor unit 9 in close contact with the document surface.
[0062]
Further, when the page turning reading unit 1 reaches the book document reading middle position 1-B substantially at the center of the book document 92, the first bias roller 3 attracts the first bias roller 3 from the first high-voltage power supply 320 shown in FIG. AC voltage is applied to form a stripe-shaped charge pattern on the turn-over conveyance belt 8.
As described above, the page-turning reading unit 1 moves to the end position 1-C at the right end in FIG. 1 while forming a stripe-shaped charge pattern on the page-turning conveyance belt 8, and the first reading sensor unit 9 thereof. Thus, the document information of the book document 92 is read.
[0063]
As described above, when the reading of the document information of the book document 92 is completed, the page turning reading unit 1 moves from the end position 1-C to the home position 1-A as shown in FIG. And moved back.
[0064]
At this time, as shown in FIG. 23, an unequal electric field is generated on the turn-over conveyance belt 8 by the charge pattern formed during the reading operation. The page is electrostatically attracted to the turn-over transport belt 8.
Therefore, in this state, the page turning reading unit 1 is moved toward the end position 1-C, and when the page turning reading unit 1 reaches the page turning start position 1-D shown in FIG. As shown in FIG. 24, the end of one right page of the book document 92 is wound into the page turning reading unit 1 together with the turning transport belt 8.
In this manner, the leading end of the document entangled in the page turning reading unit 1 is separated by the curvature of the turning roller 2 and the strength of the waist of the document as the page turning reading unit 1 moves. , And is gradually separated from the turn-over transport belt 8.
In this manner, the document gradually separated from the turn-over transport belt 8 is moved along the turning guide 10 shown in FIG. 20, and the page storage unit 7 disposed downstream in the moving direction of the document. Guided inside.
As shown in FIG. 20, the page storage portion 7 is formed in a cylindrical shape, and is extremely formed by winding the document wound in the page turning reading unit 1 along the inner peripheral surface thereof. A document for one page after reading can be stored in a small space.
[0065]
Therefore, according to the page turning reading unit 1, as shown in FIG. 22, the page turning reading unit 1 is returned from the turning start position 1-D toward the winding completion position 1-E. This makes it possible to very smoothly separate the original for one page that has been read and the original for the next page that will be read by the next reading operation.
In the document stored in the page storage unit 7 in this way, the page turning reading unit 1 moves from the winding completion position 1-E to the left side of the book document 92 beyond the center of the book document 92. When the document is further returned toward the page discharge position 1-F, the document is turned relative to the page turning reading unit 1 and the document stored in the page turning reading unit 1. It starts to be discharged from the storage unit 7.
Then, the page turning reading unit 1 is moved back to its home position 1-A, and when the movement is completed, the document stored in the page storing unit 7 of the page turning reading unit 1 is discharged. Is completed, and the turning operation for one page of the read original is completed.
[0066]
On the other hand, during the document turning operation, the first bias roller 3 is moved from immediately after the winding of the document to the page storage unit 7 of the page turning reading unit 1 is started until the winding of the document is completed. In addition, a program is performed so that the charge pattern formed on the turn-over conveyance belt 8 is discharged by applying an AC voltage for discharging from the first high-voltage power supply 320 shown in FIG.
Therefore, at the time of the return movement of the page turning reading unit 1, no electrostatic attraction force is generated between the read original and the transport belt 8 for turning the original. The taking operation and the discharging operation can be performed extremely smoothly.
[0067]
Conventionally, as an apparatus for holding and transporting a sheet member or the like, an apparatus using an air suction system, an electrostatic suction system using a comb electrode and an electric double layer system, and the like are known.
[0068]
Further, as a page turning apparatus for a book document, an apparatus using an air suction method or the like has been proposed.
However, since each of these methods has the disadvantages described below, it is almost impossible to put a book document page turning apparatus to practical use based on these methods.
That is, the air suction method requires an air pump that suctions air to generate a negative pressure and an air suction path, and thus has a drawback that the size of the device is increased.
Further, in the comb-teeth electrode embedding method, two comb-teeth electrodes are embedded in a dielectric so that their teeth mesh with each other, and a positive electrode and a negative electrode voltage are applied to each electrode. Not only is the cost increased, but also it is difficult to form the document turning and conveying belt into an endless belt.
Furthermore, in the electric double-layer system, charges of opposite polarities are charged to the belt and the sheet by corona discharge or the like. Therefore, when turning a page of a book document, etc., the charges must be charged unless only the turning pages are separated in advance. Can not.
Further, for example, in other page turning methods using a frictional force such as a rubber roller, it is difficult to improve the reliability because the page turning accuracy is significantly restricted depending on the paper quality and size of the book document. It becomes.
[0069]
On the other hand, in the embodiment of the present application, as shown in FIGS. 20, 23 and 24, an AC voltage for suction is applied from the high-voltage power supply 320 to the turning transport belt 8 composed of an endless belt. By forming an alternating stripe-shaped charge pattern on the surface of the turn-over transport belt 8, an uneven electric field is generated in the turn-over transport belt 8, and the document is held and transported, and the pages are turned over. .
Therefore, according to this page turning method, it is possible to carry out the document holding operation and the page turning operation extremely smoothly.
[0070]
Hereinafter, the basic configuration of the page turning method and the principle of electrostatic attraction will be described.
As the turning transport belt 8 used in the page turning method, a two-layered belt obtained by performing a conductive treatment on the back surface of a dielectric formed in an endless belt shape was used.
As means for applying an alternating voltage to the turnover conveyor belt 8, the first bias roller 3 rotatably supported by bringing the peripheral surface into contact with the surface of the turnover conveyor belt 8 may be used. An AC voltage for adsorption was applied by the high voltage power supply 320.
[0071]
As shown in FIGS. 20 and 23, the turning transport belt 8 and the first bias roller 3 are applied to the first bias roller 3 while an alternating electric field is applied with the conductive layer 8b of the turning transport belt 8 serving as a ground plane. By moving the transfer belt 3 relatively, a stripe-shaped charge pattern is formed on the surface of the dielectric 8a of the turn-over transport belt 8.
As a result, an unequal electric field is generated in the vicinity of the surface of the dielectric 8a of the turn-over transport belt 8.
When a dielectric material such as a paper to be read is brought close to the unequal electric field, the inside of the paper is polarized, and the electric field is unequal. work.
This is evident by applying the maxwell stress over the surface of the paper and dividing the area.
Here, the maxwell stress is:
f = EdivD− ／ grad (ED · D) + (D · grad) E (Equation (a))
Is represented by
Further, assuming that the normal direction of the surface of the turning transport belt 8 is the X axis, the maxwell stress in the X axis direction is:
[0072]
(Equation 1)

[0073]
Equation (b) expressed by
[0074]
Next, the object force (adsorption force) N of the sheet is obtained by dividing the area of the stress fx of the maxwell in the X-axis direction represented by the equation (b) along the outer surface (upper and lower surfaces) of the sheet. Desired.
That is, the object force (adsorption force) N of this paper is
N = ∫sfxdS
It becomes.
Thus, assuming that the friction coefficient of the paper is μ, the conveyance force F of the paper is
F = μN
It is represented by the following equation.
As a specific configuration of this embodiment, an endless belt in which a 10-μm-thick aluminum vapor-deposited layer (conductive layer 8b) is formed on a 75-μm-thick PET film (dielectric 8a) is used as the turn-over conveyance belt 8. Then, the pitch of the charge pattern formed thereon was 2.4 mm.
That is, the reading speed of the book document 92 is 120 mm / s, the AC frequency is 50 Hz, and the applied voltage is ± 2 kV._ppAnd
FIG. 25 shows an applied voltage of ± 2 kV._ppFIG. 26 shows the experimental value of the pitch characteristic of the conveying force when the applied voltage was constant, and the applied voltage was ± 2 kV._ppFIG. 27 shows the experimental value of the pitch characteristic of the adsorption force when the pitch is constant, and FIG. 28 shows the experimental value of the applied voltage characteristic of the conveying force when the pitch of the charge pattern was constant at 2.4 mm. The experimental values of the applied voltage characteristics of the attraction force when the pattern pitch is fixed at 2.4 mm are shown.
[0075]
As is clear from these experimental values, the pitch of the charge pattern and the applied voltage used in the present embodiment are not limited to the above-described values. The range is 5 mm to 10 mm, and the applied voltage is ± 1 kv_ppAnything above is good.
Further, in the present embodiment, as the high-frequency AC voltage for static elimination, a frequency of 2 kHz, ± 2 kV_ppThe applied voltage is used, but any of these values may be any value as long as the static elimination effect can be obtained.
As described above, according to the page turning method in this embodiment, it is not necessary to perform any work on the paper (book original 92) to be attracted to the turning conveyance belt 8, so that the papers attract each other due to static electricity. Therefore, it is possible to eliminate the occurrence of a page turning error of the book original 92 due to the occurrence of disorder (irregularity) at the sheet edge.
Further, according to this page turning method, since the place where the attraction force is generated is near the surface of the turning and conveying belt 8, the paper in contact with the surface of the turning and conveying belt 8, that is, the book A sufficiently large conveying force and a suction force are applied to the uppermost document in the page 92 where the page turning of the document 92 is performed. , The conveying force and the suction force hardly act.
Therefore, according to this page turning method, it is possible to reliably execute turning of only one page, and this method is an optimal method as a page turning method of the book original 92.
[0076]
Next, the operation of the MFDS configured as described above will be described.
29 is an MFDS electrical block diagram, FIG. 30 is an operation mode transition diagram when reading a book document, FIG. 31 is a transition diagram when reading a sheet document, and FIG. 32 is a flowchart showing the MFDS operation mode. is there.
First, the control means of the MFDS will be described with reference to FIG.
In FIG. 29, the main control board 310 controls commands and data between the boards, performs ON / OFF timing of each load, abnormal processing by each sensor input, and performs aid switching, etc., and performs the entire MFDS. You have control.
Further, the main control board 310 is configured to set a communication protocol by communicating with the connected devices, and to be able to individually cope with each connected device.
For example, when the printer 300 is connected as the output device, the pixel density, processing speed, availability of double-sided printing, availability of backside discharge, and the like are checked, and the corresponding mode selection area can be determined. Is configured.
Further, the main control board 310 has two interfaces to external devices corresponding to each mode.
[0077]
In the main control board 310 of the present embodiment, commands between the boards are performed by serial communication, separated from the data and control lines, and commands can be transmitted and received even during the data output.
Here, in order to enhance the versatility, by setting one or both of GPIB, Centronics, SCSI, etc. as the interface, the display display via a general-purpose printer or a personal computer is performed. And storage devices such as optical disk devices, HDDs, and FDDs without using a special interface.
[0078]
On the other hand, in FIG. 29, the turnover conveyance belt drive control board 311 controls the turnover conveyance belt drive motor 61.
The turning unit drive control board 312 controls the turning unit drive motor 60.
Here, the turn-over transport belt drive motor 61 detects the speed of the turn-over transport belt 8 by feedback of an encoder pulse generated by an encoder integrally attached to the turnover transport belt drive motor 61, and controls the speed position and corrects the speed. Reverse rotation operation is being performed.
[0079]
On the other hand, the turning unit drive motor 60 detects the position of the turning roller 2 by feedback of the encoder pulse generated by the encoder 152 attached to the turning roller 2, and performs the speed position control and the forward / reverse operation. I have.
[0080]
The turn-over transport belt drive control board 311 and the turn-over unit drive control board 312 are connected to the main control board 310, respectively, and transmit and receive commands to and from the main control board 310 by serial communication. It is carried out.
The operation display board 313 includes a keypad for setting the number of prints, a scaling ratio, the number of pages to be turned, and each mode, a display for these key inputs, an error display, a turning state display, and a display for each mode. The display of the original setting method and the like is performed.
[0081]
Here, in the mode display, only a mode that is possible according to the capability of the connected device (printer 300) is displayed, or an error is displayed when an impossible mode is selected.
For example, if a key input of the double-sided mode selection key 612 is performed even though a printer that cannot perform double-sided printing is connected, an error display such as “printing is impossible on both sides” is displayed.
Reading of a document is started by key input of a start key 600 on the operation display board 313.
Further, the operation display board 313 and the main control board 310 transmit and receive commands or data by serial communication.
[0082]
The first image processing board 314 has a function of generating a drive clock for a Si equal-magnification sensor 315 (hereinafter referred to as a first CCD 315) built in the first reading sensor unit 9, and a function of the first reading sensor unit 9. It has a function of setting the ON / OFF timing of the built-in first LED 316 and a function of amplifying the output of the first CCD 315, A / D converting the output, and performing image processing. In the first image processing board 314, image processing such as shading correction, MTE correction, main scanning magnification, character processing, photographic processing, and negative / positive reversal are performed.
The first image processing board 314 is connected to the main control board 310, and exchanges data and commands with the main control board 310. The second image processing board 317 is, like the first image processing board 314, a drive clock for the second CCD 318 built in the second reading sensor unit 14 (having the same configuration as the first reading sensor unit 9). , The function of setting the ON / OFF timing of the second LED 319 also incorporated in the second reading sensor unit 14, the output of the second CCD 318, the A / D conversion of this output, and image processing. It has a function to perform.
Further, in the second image processing board 317, similar to the first image processing board 314, image processing such as shading correction, MTF correction, main scanning magnification, character processing, photographic processing, and negative / positive inversion are performed. Done.
Further, the second image processing board 317 is connected to the main control board 310, and exchanges data and commands with the main control board 310.
[0083]
As described above, the first high-voltage power supply 320 is a power supply for applying a high-voltage AC voltage to the first bias roller 3, and is configured to generate two kinds of frequencies for original suction and belt static elimination. Switching of each frequency is performed by switching signals from two output ports of the main control board 310.
Similarly to the first high-voltage power supply 320, the second high-voltage power supply 321 is a power supply for applying a high-voltage AC voltage to the second bias roller 11, and generates two frequencies for document adsorption and belt static elimination. The switching of each frequency is performed by a switching signal from two output ports of the main control board 310.
[0084]
The paper feed clutch 128 controls the start timing of feeding the sheet document 200 based on a control signal from the main control board 310.
The various sensors 25, 26, 27, 28, 29, 30, 31, 32, 33, and 34 connected to the respective input ports of the main control board 310 perform mode switching as described in the description of the mechanism. Timing detection, abnormality detection, and the like are performed, and the detection signals are given to the main control board 310, respectively.
[0085]
Next, the operation mode of the MFDS will be described.
The operation mode of the MFDS is roughly divided into two modes.
A first operation mode of the MFDS is a book original reading mode for performing an automatic page turning reading operation of a book original as shown in FIG. 30, and a second operation mode is as shown in FIG. This is a sheet document reading mode for performing an automatic sheet feeding reading operation of a sheet document.
[0086]
The book document reading mode and the sheet document reading mode have further subdivided modes.
That is, as shown in FIG. 30, the book original reading mode includes an automatic book size recognition mode for automatically recognizing the book size of the book original 92 and a book for designating the book size by key input of the operation display board 313. There is a size key input mode.
In each of the automatic book size recognition mode and the book size key input mode, an automatic page turning reading operation for the book document 92 is performed by the spread reading mode in which the book document 92 is set with the document surface facing upward. Is performed.
Further, in the book document reading mode, as a reading method, in association with an output device (especially, a printer), two pages of document images on the left and right sides of the opened book document 92 are continuously read, and these two pages are read. Using a two-page spread continuous reading mode for printing an image on a single transfer sheet and a printer having a double-sided image forming function, the left and right two-page original images were printed in the above-described two-page continuous reading mode. A two-sided continuous double-page reading mode and a two-page spread book original 92 are formed on the back side of one transfer sheet so as to continuously form read images for the next two right and left pages of the open book original 92. A one-page spread reading mode in which a reading operation is performed by separating the original image of the left and right side pages one by one. On the back side of the transfer paper printed in the one-page section reading mode, the printer image having the double-sided image forming function is used to form the document image of both the left and right pages next to the opened book document 92 one page at a time. , And a double-sided mode of a two-page spread reading mode.
[0087]
On the other hand, in the sheet original reading mode, as shown in FIG. 31, the sheet original 200 is automatically fed and discharged while the position of the first reading sensor unit 9 or the second reading sensor unit 14 is fixed. A first reading sensor unit of the page turning reading unit 1 in a sheet document through mode in which a document image is read by a sheet through method while being moved, and in a state where the sheet document 200 is set (fixed) on the document mounting surface 116. 9 is repeatedly moved back and forth (scanning) to read the sheet document 200, and when the document cannot be set (or not set) by the automatic document feeding function (ADF), the document is manually set. There is a sheet document manual opening / closing mode to be set.
The sheet original through mode includes a single-sided reading mode for reading an image of only one side of the sheet original 200, and a double-sided reading mode for simultaneously reading images on both sides of the sheet original 200 by the first reading sensor unit 9 and the second reading sensor unit 14. There is a reading mode.
Further, the two-sided reading mode includes an identical-position reading mode in which the first reading sensor unit 9 and the second reading sensor unit 14 are arranged at the same position facing each other to read a document image, and a first reading sensor unit. 9 and the second reading sensor unit 14 are arranged at different positions shifted from each other, and have a different position reading mode for reading a document image.
[0088]
The operation modes of the MFDS have been described above. Next, the switching of the individual modes described above will be described with reference to FIG.
In FIG. 32, when the main power supply of the MFDS is turned on, the main control board 310, the turning and conveying belt drive control board 311, the turning unit drive control board 312, the operation display board 313, and the first image processing board 314 shown in FIG. , The second image processing board 317 is reset, and initialization is performed. After that, the connection of the connected device such as the printer 300 is checked, and the modes that can be supported by the connected device are displayed. Accept.
During this time, the setting of the book original 92 or the sheet original 200 is performed.
[0089]
Here, when the sheet document 200 is set on the sheet document tray 94, the sheet document sensor 25 is turned on.
[0090]
Here, the transport section 19 of the MFDS is opened by the open key 620 of the operation display board 313, and the book original 92 is set in the central reference positioning section 24 of the original placing surface 116 in a spread state. In this case, the book document sensor 27 is turned on.
The reading of the document image is performed according to the ON / OFF state of the sheet document sensor 25 and the book document sensor 27, and the number of prints indicating the number of prints of the sheet document 200 input by the ten keys 602 of the operation display board 313. The mode switches as shown in FIG.
That is, if the book document sensor 27 is OFF, the sheet document sensor 25 is ON, and the number of prints is “1”, the mode transits to the sheet document through mode.
If the book document sensor 27 is OFF, the sheet document sensor 25 is ON, and the number of prints is “2” or more, the mode shifts to the sheet document scan mode.
Further, when the book document sensor 27 and the sheet document sensor 25 are both FF, the mode transits to the sheet document manual opening / closing mode.
When the book original sensor 27 is ON and the sheet original sensor 25 is OFF, the mode transits to the book original reading mode.
Further, when the book document sensor 27 and the sheet document sensor 25 are both ON, an abnormal process 1 (warning buzzer ON and error display) is performed to call the user's attention. Then, the mode transits to the book document reading mode.
After entering the mode subroutine thus selected, if the start key 600 of the operation display board 313 is not pressed, the process returns to the step of receiving a key input without executing the image reading operation.
[0091]
Next, the operation of each mode described above will be described.
First, the book document reading mode will be described with reference to FIG. When the MFDS mode enters the book document reading mode, ON / OFF of the scan cutoff sensor 34 is checked.
As shown in FIG. 4, the scan cutoff sensor 34 is turned on by detecting the upper limit detecting section 76 when the page turning reading unit 1 has moved up to the upper limit position.
As described above, the page turning reading unit 1 is moved up and down in accordance with the thickness of the book document 92 placed on the document placing surface 116.
As the page turning reading unit 1 rises, that is, as the thickness of the book document 92 increases, the tension of the turning transport belt 8 for driving the book document 92 increases.
Therefore, if the tension of the turn-over transport belt 8 is too high, that is, if the book original 92 is too thick and the page-turning reading unit 1 rises too much, this tension acts as a brake and the page-turning reading unit 1 I cannot scan.
The scan cut-off sensor 34 detects such a level that the page turning reading unit 1 cannot scan because the book document 92 is too thick.
If the scan cut-off sensor 34 is ON, the user performs the abnormal process 2 (ON of the warning buzzer and an error display of "book original is too thick"), and the user forcibly closes the transport unit 19, The transport unit 19 is prevented from being damaged.
Here, when the thickness of the book document 92 is equal to or less than the adaptive level, the transport unit lock sensor 31 is turned on by closing the transport unit 19 by the user.
At this time, if the transport unit 19 remains open, that is, if the transport unit lock sensor 31 remains OFF, abnormality processing 3 (turning on the warning buzzer and displaying “Please close the transport unit”) is performed. .
When the transport unit 19 is closed, ON / OFF of the book size upper limit sensor 33 is checked.
Here, when the book size upper limit sensor 33 detects the book size of the book document 92 and is turned ON, that is, the book size of the book document 92 set on the document placing surface 116 is changed to the page turning reading unit. In the case of a book size that cannot be read beyond the reading area 1, abnormal processing 4 (turning on a warning buzzer and displaying "book document size is too large") is performed.
[0092]
After that, after checking the presence of key input of the number of prints, the magnification, and the number of pages to be turned, the prescan plug is set in the case of the automatic book size recognition mode, and in the case of not being in the automatic book size recognition mode. Then, a book size input mode is set, and a predetermined key input is performed on the operation display board 313 to set the book size, whereby the reading area of the book document 92 is determined.
Then, when the start key 600 is pressed, the transport unit lock device 140 operates, and the transport unit 19 is locked to the document table 18.
Thus, it is possible to prevent a situation in which the user mistakenly opens the transport unit 19 and damages the book original 92 during the page turning operation of the page turning reading unit 1.
[0093]
Next, after the operation of the transport unit locking device 140, if the above-described pre-scan flag is set, the pre-scan operation of the page turning reading unit 1 is performed.
Here, if the prescan plug is not set, the prescan operation is skipped.
After this pre-scan operation, it waits until the connection device (printer 300) is ready.
When the connection device (printer 300) is ready and receives a reading start signal output from the connection device (printer 300), the page turning reading unit 1 is driven and, as described above, The reading operation of the document image of the document 92 is started.
The reading operation by the page turning reading unit 1 is repeatedly performed a number of times corresponding to the number of prints set before.
When the predetermined number of reading operations are completed, the page turning reading unit 1 executes the page turning operation as described above in order to perform the reading operation of the document image of the next page.
In this way, the reading operation of the document image of the book document 92 and the page turning operation are repeatedly executed according to the preset number until the last page is turned.
Then, when the page turning operation of the preset final turning page is completed and a predetermined number of reading operations for the final reading page are completed, the page turning reading unit 1 is performed without performing the page turning operation of the final reading page. Is returned to the home position 1-A, and the book document reading mode routine is returned.
The basic operation of the book original reading mode is as shown in the flowchart of FIG. 33 described above. In this mode, the two-page continuous reading mode, the two-sided mode, and the one-page split reading mode are described. Then, the double-sided mode becomes the input mode accepted at the time of the key input setting in FIG.
Each of these input modes will be described with reference to a timing chart showing the progress since the start key 600 was pressed.
[0094]
First, the two-page spread continuous reading mode will be described with reference to the timing chart shown in FIG.
In FIG. 34, when the start key 600 of the operation display boat 313 is pressed and the reading start switch SW is turned on, the shirt (not shown) in the first reading sensor unit 9 is closed.
The inner surface of the shirt is a white reference plate, by which shading correction of the first reading sensor unit 9 is performed.
This shading correction is performed every time the page turning reading unit 1 rises, and is completed before the moving speed of the page turning reading unit 1 becomes constant (a timing chart of this portion is not shown).
The start of the page turning reading unit 1 is performed by a forward rotation start signal sent from the main control board 310 to the turning unit control control board 312.
In response to the forward rotation start signal, the page turning reading unit 1 starts pre-scanning.
Here, after the moving speed of the page turning reading unit 1 has risen to the constant speed Vf, the above-described shirt has already been opened, and the reading of the original image of the book original 92 has been started by the first CCD 315.
By reading the page turning reading unit 1 at the time of pre-scanning, the edge of the opened book document 92 is edge-detected by image processing, and the output of the encoder 152 attached to the turning roller 2 at this time is counted. By recognizing the book size of the book document 92 set on the document placing surface 116, the reading area of the document image of the page turning reading unit 1 and the page turning area are determined.
[0095]
As described above, since the MFDS is configured so that the book original 92 is set with reference to the center of the original placing surface 116, by detecting only the left end of the set book original 92, The reading area of the document image and the page turning area of the page turning reading unit 1 can be calculated.
[0096]
Therefore, in the MFDS, when the book size of the book document 92 is detected, the page turning reading unit 1 does not need to be pre-scanned on the entire surface. The book size of the placed book document 92 can be detected.
As a result, during the pre-scanning of the page turning reading unit 1, the reading start page of the book document 92 is prevented from being erroneously turned.
The book size data of the book document 92 is transmitted from the main control board 310 to the printer 300 as an externally connected device.
[0097]
On the other hand, while the book size detection is completed and the book size data is transmitted to the printer 300, the main control board 310 instructs the turning unit drive control board 312 to rotate the turning unit drive motor 60 in reverse. A signal is given, and the page-turning reading unit 1 is returned to the home position 1-A at the speed Vr.
The document mounting surface 116 of the document table 18 of the MFDS is colored with a chromatic color, such as yellow, which is rarely used as a book document. Since the area identification accuracy between the placement surface 116 and the reading area of the document image of the book document 92 can be improved, the book size detection at the time of the pre-scan can be performed more accurately, and the book size data of the book size data can be detected. Reliability is improved.
Here, if the document placing surface 116 is colored with an intermediate color such as gray, for example, the first CCD 315 of the first reading sensor unit 9 does not use a color sensor and can be used for area identification at the time of pre-scanning. Becomes possible.
[0098]
After the above-described pre-scan is completed and the page turning reading unit 1 retreats to the home position 1-A, the printer 300 is ready, and the printer 300 requests the main control board 310 to transfer data. When the transfer request signal is supplied, a forward rotation signal for rotating the flipping unit drive motor 60 forward is supplied from the main control board 310 to the flipping unit drive control board 312, and the forward rotation of the page flipping reading unit 1 is thereby performed. The rolling operation is started.
As described above, the output of the encoder 152 of the page turning roller 2 is fed back to the page turning reading unit 1 to cure the original surface of the book original 92 and to be controlled at a constant speed of Vf. It is moved toward the end position position 1-C.
At this time, the LED 316 of the first reading sensor unit 9 has already been turned on, and reading of the document information of the hook document 92 has been started by the first CCD 315 of the first reading sensor unit 9.
[0099]
Here, as shown in FIG. 1, the vicinity of the binding portion (center portion) of the book document 92 set to be spread and set on the document placing surface 116 is close to the binding portion because the surface of the document is very warped. It becomes difficult to accurately read the document information.
In addition, usually, document information such as characters and images is not formed near the binding portion of the book document 92.
Therefore, in the MFDS, as shown in FIG. 34, the reading SFGATE of the first CCD 315 is OFE near the binding portion of the book document 92, and the reading of document information near the binding portion is masked. I have.
As described above, the mask area at the time of the initial setting of the document information is set so as to be 10 mm and 110 mm from the center of the center reference positioning unit 24. The set value can be changed by key input of the book binding portion mask area setting key 608, and it is possible to cope with a book document with a special binding.
By the way, the reading of the document information of the book document 92 by the first reading sensor unit 9 is performed until the page turning reading unit 1 reaches the end position 1-C. , The first high-voltage power supply 320 is turned on at the frequency f1. As a result, the above-described charge pattern is formed in a portion of the turning transport belt 8 which comes into contact with the right page of the book document 92.
As described above, the turning transport belt 8 is not driven when the page turning reading unit 1 is driven, and functions to hold the book original 92.
[0100]
In this way, when the page turning reading unit 1 is driven to its end position 1-C and reading of the document information to the reading area at the right end of the book document 92 is completed, the output of the first high-voltage power supply 320 Is turned off, a turning signal is given from the main control board 310 to the turning unit drive control hood 312, and the page turning reading unit 1 starts the page turning operation of the book document 92.
At this time, when the document surface read by the first reading sensor unit 9 corresponds to the preset final reading page of the book document 92, the turning signal cannot be completely output from the main control board 310. After finishing reading the last read page of the book document 92, the page turning reading unit 1 is returned and moved to the home position 1-A without performing the above-described page turning operation.
During the page turning operation of the book original 92, the reverse operation of the page turning reading unit 1 is slow-started until the page turning sensor 29 is turned on, and the book electrostatically attracted onto the turning transport belt 8 is started. The reading end page of the document 92 (the right page in FIG. 1) is guided into the page storage unit 7.
[0101]
Then, the page turning reading unit 1 is further returned and moved toward the home position 1-A, and the center of the read end page of the book document 92 is turned into the page storage unit 7.
Further, during the page turning operation of the page turning reading unit 1, the first high-voltage power supply 320 is turned on at the frequency f2 in order to eliminate the charge pattern in the original adsorbing area of the sheet feeding conveyor belt 8.
[0102]
In this way, the read end page of the book document 92 turned into the page storage unit 7 of the page turning reading unit 1 is moved to the end after the page turning reading unit 1 has passed the center of the book document 92. The sheet is discharged from the inside of the page storage section 7 during the position 1-C, and the page turning operation is completed.
[0103]
The return speed Vrm of the page turning reading unit 1 at the time of discharging the page is set to be higher than the speed Vf at the time of reading the document, that is, Vrm> Vf. Has been planned.
The state of the series of page turning operations is detected by the page turning sensor 29.
That is, in the MFDS, the presence / absence of an abnormality is detected by checking ON / OFF of the page-turning sensor 29 at each position of the page-turning reading unit 1, and when there is an abnormality, an abnormality processing operation is executed.
As this abnormal processing operation, a warning buzzer is activated, and, for example, when the original page cannot be turned into the page storage unit 7, “page cannot be turned”, the original page turned into the page storage unit 7 is displayed. If the page cannot be ejected, a message such as "page overlap impossible" is displayed on the operation display board 313, and the page turning operation is stopped.
In addition, in order to allow the user to confirm the page turning state in which the abnormality has occurred, the location where the page turning state has occurred is displayed on the operation display board 313.
[0104]
Hereinafter, the reading of the document images of the second and subsequent pages of the book document 92 and the page turning operation are sequentially started by a transfer request signal from the printer 300, and the same reading operation and page turning operation as described above are performed. The processing is repeatedly executed until a preset final reading page is reached.
Here, in the timing chart of FIG. 34, when the number of prints of the document is set to “1”, that is, each time each read page of the book document 92 is read once, the page that has been read is turned over. Although the case where the operation is performed has been described, when the number of prints of this document is set to “2” or more, when the first document reading operation by the first reading sensor unit 9 is completed, A reverse signal is transmitted from the main control board 310 to the turning unit drive control board 312 instead of the turning signal, and the page turning reading unit 1 moves toward the home position 1-A at the speed Vr. When the return operation is completed, the second document reading operation of the page turning reading unit 1 is started at the same time. It is over the door.
The document reading operation of the page turning reading unit 1 is repeatedly executed by the preset number of prints of the document, and when the number of operations matches the number of prints, the first operation is performed. Then, a turning signal is transmitted from the main control board 310 to the turning unit drive control board 312, and the above-described page turning operation is executed.
[0105]
Hereinafter, the reading of the document image of the second page and subsequent pages of the book document 92 and the page turning operation are sequentially started by the transfer request signal from the printer 300, and the same number of reading operations as the number of prints described above are performed. , And the page turning operation are repeatedly executed until a preset final read page is reached. Here, if the read original image is set to be enlarged by the print magnification key 614, the scan speed Vf of the first reading sensor unit 9 is set to a speed corresponding to the magnification. The original image is scaled in the sub-scanning direction, and the first image processing board 314 is scaled in the main scanning direction.
[0106]
On the other hand, in the double-sided mode of the two-page spread continuous reading mode as described above, the transmission timing of the transfer request signal from the printer 300 to the main control board 310 is set because the printer 300 performs the double-sided printing of the original image. Although the operation is slightly delayed, other operations are the same as those in the two-page spread continuous reading mode described above.
[0107]
Next, a two-page spread reading mode will be described with reference to FIG.
The two-page spread reading mode is a mode in which the left page and the right page of the spread book document 92 are separately read and an image is formed, and a mode in which each of these images is printed on separate transfer paper. There is a mode for printing on the front and back of one transfer sheet (a screen mode of a two-page spread reading mode).
In this mode, one of the operation of reading from the left page and the operation of reading from the right page of the book document 92 is selectively set by a key input of the reading start page selection key 603 on the operation display board 313. can do.
[0108]
FIG. 35 shows a timing chart when reading is started from the left page of the book original 92.
The operation in the two-page spread reading mode is almost the same as the operation in the two-sided mode of the two-page continuous reading mode described above. Is transmitted to the main control board 310 on a page-by-page basis, whereby the page turning reading unit 1 moves at a constant speed from the left page of the book document 92 to the right page. (Scan).
[0109]
FIG. 36 shows a timing chart in the case where reading is started from the right page of the book document 92 in the double-page spread reading mode.
As is apparent from this timing chart, when reading is started from the right page of the book document 92, the moving speed of the page turning reading unit 1 with respect to the left page where the book document 92 is not read is reduced to the right page. The scanning speed is programmed to be higher than the scanning speed Vf of the first reading sensor unit 9 in order to shorten the document reading time, that is, improve the performance of the reading function.
If a page to be skipped without scanning (skip) is set by the read skip page setting key 618 in the two-page spread reading mode, a page turning reading unit for the read skip page is set. 1 is moved at a speed higher than the scanning speed Vf of the first reading sensor unit 9 at the time of reading, and is programmed so as to immediately execute the turning operation of the reading skip page (see the timing chart). Not shown).
Generally, as shown in FIGS. 35 and 36, there are few printers that can continuously request a transfer request signal from the printer 300 to the main control board 310 in a normal state.
[0110]
Therefore, when using such a general printer to perform the double-page spread reading mode, the printer side feeds two transfer papers so as to overlap each other. Can be done.
Here, if a certain distance must be provided between these two transfer papers due to the resist between the transfer paper and the photosensitive drum, the left page of the book original 92 must be provided. Image data on the right side of the book original 92 is realized by delaying the transfer timing to the printer through the delay memory by a time corresponding to the distance between the transfer papers. be able to.
FIG. 37 is a block diagram showing an example of the latter case, and FIG. 38 is a timing chart thereof.
In this example, the internal gates A and B on the main control board 310 cause the image data output to the printer through the switch memory to the image data output to the printer through the switch memory by the time Td. It is configured to be delayed.
[0111]
Next, the double-sided mode in the two-page spread reading mode will be described.
First, a description will be given of a case in which image data of two pages on the left and right sides of the spread book original 92 are printed on both sides of one transfer sheet.
In this case, since the transfer paper needs to be reversely conveyed on the printer 300 side, it takes some time from the end of the printing of the left page image data to the start of the printing of the right page image data. Hangs.
For this reason, in this mode, the drive of the page turning reading unit 1 is temporarily stopped when the page turning reading unit 1 finishes reading the left page of the book document 92 and reaches near the binding portion.
When the printing of the left page image on the printer 300 side and the reverse conveyance of the transfer sheet are completed and a transfer request signal is output from the printer 300 to the main control board 310, the stopped page turning reading unit 1 is stopped. Is again driven at a predetermined scanning speed Vf to read the right page of the book original 92, and the image data of the right page is transferred to the printer 300, and the transfer paper having the left page image printed on the front surface is read. This right page image is printed on the back side, and double-sided printing is performed.
FIG. 39 shows a timing chart at this time.
[0112]
Next, in the two-page spread reading mode, the duplex mode in which the relationship between the front and back of the printed transfer paper and the front and back of the document surface of the book document 92 is matched to form an image will be described.
In this mode, when reading from the left page of the book document 92 is started, as described above, the printer 300 is instructed to perform continuous sheet feeding, and the printed transfer of the left page image is performed. While the paper is discharged as it is, the transfer paper on which the right page image is printed is reversed and conveyed, and preparations are made for printing the left page image of the next page of the hook document 92 on the back surface.
During this time, the MFDS performs a page turning operation on the document page that has been read.
When the page turning operation on the MFDS side is completed, the reading operation for the next page is executed, and the read left page image is placed on the back side of the transfer paper on which the right page image has been printed and conveyed in reverse. Printed and ejected.
The right page image read at this time is printed on a newly fed transfer sheet.
This transfer sheet is reversed and conveyed similarly to the previous transfer sheet, and preparation is made for printing the left page image of the next page of the book document 92 on the back surface.
By repeating such a series of operations, a transfer sheet on which a document image having the same page configuration as the book document 92 is printed is obtained.
The above is an example of the operation in the book document reading mode.
[0113]
Here, setting of a book original in the listening / reading reading mode will be described.
In the connection device check in FIG. 29, if the printer 300 can discharge the back side, the following display is performed.
That is,
"If the book is written horizontally (open left), open the first page you want to read and set it up front."
“If the book manuscript is written vertically (right open), open the first page you want to read and set it upside down.”
As described above, the respective setting methods for the horizontal writing and the vertical writing of the book document are instructed.
[0114]
On the other hand, in the connected device check in FIG. 29, if the printer 300 can only discharge the front side, the following display is performed.
That is,
"If the book manuscript is horizontally written (left open), open the last page you want to read and set it upside down."
"If the book manuscript is written vertically (right-handed), open the last page you want to read and set it face up."
As described above, the respective setting methods for the horizontal writing and the vertical writing of the book document are instructed.
In the MFDS, by setting the book original 92 in accordance with the above-described instruction, the pages of the transfer paper to be discharged can be aligned regardless of the function of the printer 300 connected thereto.
There are two input methods for inputting the number of pages to be turned in the MFDS by key input on the operation display board 313, and the user can select any one of these input methods according to his / her preference. It has become.
One of the manual methods is to set the total number of pages to be read by using the reading total page setting key 606 and the like. The other input method is to set the reading start page setting key 604 and the reading last page. This is a method of inputting the first page to be read and the last page using the setting key 605 or the like.
Regardless of which method is used for inputting the number of page turns in the MFDS, it is only necessary to accurately calculate the number of page turns of the page turning continuous unit 1.
[0115]
Hereinafter, a method of calculating the page turning and reculturing in each of the above-described methods will be described.
First, a case where the total number of pages to be read is input will be described.
Here, if the total number of pages to be read is X and the number of turns is M,
To continue from the left page,
(X-1) / 2 = M + surplus ... (1)
When reading from the right page,
(X-1) / 2 = M + Remainder ... 2
By calculating the value of M from these equations, the number of turns can be obtained.
Next, a case where the first page to be read and the last page are input will be described.
Here, if the first page to be read is Y, the last page is Z, and the total number of pages to be read is X,
X = Z-Y + 1 ... (3)
By substituting the equation (3) into the equations (1) and (2), the number of turns M can be calculated.
By the way, as described above, the MFDS is configured so that a single device can selectively read a book document and a sheet document and form an image thereof.
The image reading mode for the book document is as described above. Hereinafter, the image reading mode for the sheet document in the MFDS will be described.
As shown in FIG. 31, the sheet original reading mode includes a sheet original through mode, a sheet original scanning mode, and a sheet original manual opening / closing mode.
[0116]
First, the sheet original through mode will be described.
The sheet document through mode includes a one-sided document reading mode and a two-sided document reading mode. The two-sided document reading mode includes a same-position reading mode and a different-position reading mode.
The selection of these modes is performed as shown in FIG.
First, in the single-sided original reading mode, as shown in FIGS. 41 and 42, the sheet original 200 is set downward on the sheet original tray 94, and when the start key 600 is pressed in this state, first, Then, the power supply of the turning / conveying belt drive motor 61 is turned on, the driving roller 12 is rotated, and the turning / conveying belt 8 is rotated.
[0117]
At this time, if there is no abnormality in each sensor and each input data, the paper supply clutch 128 is turned on, and the second paper supply pulley 130 attached to the first belt support roller 97 passes through the paper supply drive belt 127, The sheet feeding roller 96 is rotated, and the sheet document 200 is conveyed toward the sheet separation pad 95.
The sheet separation pad 95 separates only the lowermost one sheet document 200 from other sheet documents, and contacts the turn-over transport belt 8 while being guided by the first transport guide 108 and the second transport guide 109. Transported to
Here, a paper feed sensor 26 is attached to the second conveyance guide 109, and after the rear end of the sheet document 200 is detected by the paper feed sensor 26, the paper feed clutch 128 is flipped. , The conveyance timing of the sheet document 200 is set.
On the other hand, along with the rotation of the turning transport belt 8, an AC high voltage is applied to the second bias port 11 from the AC power supply 35, and a stripe-shaped charge pattern is formed on the turning transport belt 8.
As a result, the fed sheet document 200 is sucked and conveyed by the turnover conveyance belt 8.
At this time, the linear velocity of the turn-up conveyance belt 8 is changed to 360 mm / s at the time of equal magnification, and is changed according to the set magnification at the time of magnification.
[0118]
On the other hand, in this mode, the page turning reading unit 1 is located at the end position 1-C, and the original of the sheet original 200 conveyed by the turning conveying belt 8 by the first reading sensor unit 9 is used. Information is read sequentially (pixel density 400 dpi).
The sheet document 200 that has been read is nipped and conveyed by the third conveying guide 110 and the fourth opposing roller 103, the fifth opposing roller 104, the sixth opposing roller 105, and the seventh opposing roller 106, and is discharged. The paper is discharged from the paper outlet 117 onto the paper discharge tray 23.
A paper discharge sensor 28 is attached to the third transport guide 110 near the paper discharge port 117, and the paper discharge jam of the discharged sheet original 200 is detected.
[0119]
When the reading operation of the first sheet document 200 is completed, next, at a predetermined sheet feeding timing, the boat clutch 128 is turned on again, and the second sheet document 200 is fed. A reading operation similar to the above is performed.
In this way, the sheet documents 200 set in the sheet document tray 94 are sequentially fed and read, and the last (topmost) sheet document 200 is fed, and the sheet document sensor 25 is turned off. The power supply of the two-bias roller 11 is switched to the high-frequency AC voltage, the charge pattern of the turn-over conveyance belt 8 is eliminated, and after the final sheet document 200 is discharged, all operations of the MFDS are stopped.
[0120]
The reading operation described above is an operation in the case where a printer having a backside discharge function is connected to the MFDS, thereby realizing page alignment and discharge of the sheet document 200 and the printed transfer sheet.
[0121]
Here, when the printer connected to the MFDS has only the front-side paper discharge function, the sheet document 200 is set upward on the sheet document tray 94, and the second reading sensor unit 14 By reading the sheet document 200, the sheet document 200 and the printed transfer paper are aligned and discharged in the same manner as in the case of the above-described printer having the backside discharge function. The other operations when the printer having the front side discharge function is connected are the same as those when the printer having the back side discharge function is connected.
[0122]
Next, the duplex document reading mode in the sheet document through mode will be described.
In the two-sided document reading mode, a horizontally written sheet document is set on the sheet document tray 94 with the leading edge of the document facing downward.
This is because the first reading sensor unit 9 and the second reading sensor unit 14 do not have a memory, so that only mirror inversion in the main scanning direction can be used.
[0123]
First, the basic operation of the same position reading mode in the double-sided original reading mode is the same as that of the single-sided original reading mode, as shown in FIGS. 43 and 44. When the reading unit 1 is located at its home position 1-A, and the document table 18 is located at the same position as the position of the second reading sensor unit 14 around the document table 18, reading of document information on both front and back sides of the sheet document 200 is performed. The first reading sensor unit 9 and the second reading sensor unit 14 perform the operations in parallel.
On the other hand, the basic operation of the separate position reading mode in the double-sided original reading mode is the same as that of the single-sided original reading mode as shown in FIGS. 45 and 46. The turning-over reading unit 1 is located at its end position 1-C.
As is clear here, in this separate position reading mode, the interval between the reading positions of the first reading sensor unit 9 and the second reading sensor unit 14 is larger than the length of the document of the maximum size. Document information on both sides of the sheet document 200 read by the first reading sensor unit 9 and the second reading sensor unit 14 is output in time series.
[0124]
Next, the sheet scan mode in the sheet original reading mode will be described.
In this sheet scan mode, as shown in FIGS. 47 and 48, the sheet document 200 is set upward on the sheet document tray 94, and when the start key 600 is pressed in this state, first, the sheet is turned. The power supply of the transport belt drive motor 61 is turned on, the drive roller 12 is rotated, and the turning transport belt 8 is rotated.
At this time, if there is no abnormality in each sensor and each input data, the paper supply clutch 128 is turned on, and the second paper supply pulley 130 attached to the first belt support roller 97 passes through the paper supply drive belt 127, The sheet feeding roller 96 is rotated, and the sheet document 200 is conveyed toward the sheet separation pad 95.
The sheet separation pad 95 separates only the lowermost sheet original defect 200 from other sheet documents, and comes into contact with the turn-over transport belt 8 while being guided by the first transport guide 108 and the second transport guide 109. It is transported to the position.
Here, a paper feed sensor 26 is attached to the second conveyance guide 109, and after the rear end of the sheet document 200 is detected by the paper feed sensor 26, the paper feed clutch 128 is turned off. , The conveyance timing of the sheet document 200 is set.
On the other hand, during this time, an AC high voltage is applied to the second bias roller 11 from the AC power supply 35 with the rotation of the turn-over conveyance belt 8, and a stripe-shaped charge pattern is formed on the turn-over conveyance belt 8.
As a result, the fed sheet document 200 is sucked and conveyed by the turnover conveyance belt 8.
At this time, the linear velocity of the turn-over conveyance belt 8 is set to 360 mm / s, and when the leading end of the sheet document 200 reaches the home position 1-A, the rotation of the turn-over conveyance belt 8 is stopped. It has become.
[0125]
On the other hand, in this mode, the page turning reading unit 1 is located at its home position 1-A, and after the turning of the turning conveyance belt S is stopped, the page turning reading unit 1 is turned by the turning unit drive motor 60. The document information of the sheet document 200 conveyed by the turn-over conveyance belt 8 is sequentially read by the first reading sensor unit 9 while being moved toward the end position 1-C (pixel density is 400 dpi).
At the time of reading the document information, a high-frequency AC voltage is applied to the first bias roller 3 by the first high-voltage power supply 320, and the charge pattern formed on the turn-over transport belt 8 is eliminated.
This prevents the sheet document 200 from entering the page-turning reading unit 1 during the return movement of the page-turning reading unit 1.
The page turning reading unit 1 that has finished reading the sheet document 200 in this manner is returned toward its home position 1-A.
When the page turning reading unit 1 returns, the first reading sensor unit 9 is retracted upward from the document surface of the sheet document 200 and a high voltage AC voltage is applied to the first bias roller 3 from the first high voltage power supply 320. Then, a stripe-shaped charge pattern is formed on the turn-over transport belt 8, and the sheet document 200 is attracted and fixed to the turn-over transport belt 8.
After the above-described operation is repeated the set number of times, the turn-over conveyance belt drive motor 61 is turned on, the turn-over conveyance belt 8 is rotated, and the sheet document 200 that has completed the reading is fed to the sheet ejection port. The paper is discharged onto the paper discharge tray 23 from 117.
A paper discharge sensor 28 is attached to the third transport guide 110 near the paper discharge port 117, and the paper discharge jam of the discharged sheet original 200 is detected.
Then, when the reading operation of the first sheet document 200 is completed, next, at a predetermined sheet feeding timing, the sheet feeding clutch 128 is turned on again, and the second sheet document 200 is fed. A reading operation similar to the above is performed.
In this manner, the sheet documents 200 set in the sheet document tray 94 are sequentially fed and read, and the last (topmost) sheet document 200 is fed, and the sheet document sensor 25 is turned off. After the power supply of the 2 bias roller 11 is switched to the high-frequency AC voltage of the second high-voltage power supply 321, the charge pattern of the turn-over conveyance belt 8 is eliminated, and the final sheet document 200 is discharged. Is stopped.
[0126]
Next, the sheet original manual opening / closing mode in the sheet original through mode will be described.
As shown in FIGS. 49 and 50, the operation in the sheet original manual opening / closing mode is performed by using the sheet conveying means and the respective power sources for sheet suction in the operation of the above-described sheet original scanning mode. The state is set to the OFF state, and the operator replaces the sheet document manually.
Hereinafter, the operation control of the page turning reading unit 1 in the MFDS will be described.
FIG. 51 shows an operation control circuit of the page turning reading unit 1 in this MFDS.
This operation control circuit controls the reciprocating drive of the page turning reading unit 1 and the speed thereof, and is incorporated in the turning unit drive control board 312.
In FIG. 51, a microcomputer 520 (hereinafter simply referred to as a microcomputer) also performs mode control and sequence control of the MFDS (details are not shown).
As such a microcomputer 520, for example, a programmable interval timer 521 (hereinafter simply referred to as a timer) based on μPD71054G is connected.
The timer 521 is for outputting a pulse width modulated PWM output for controlling the speed of the turning unit drive motor 60 (DC motor) under the control of the microcomputer 520.
[0127]
The cycle of the PWM control is 50 (μsec), which is controlled with a resolution of 400 bits.
The timer 521 is connected to an 8 MHz oscillator 522 so that a clock signal is supplied.
In addition, the turning unit drive motor 60 supplies a drive transistor Q to the microcomputer 520.₁~ Q₄Connected through.
That is, the transistor Q₁, Q₂Is ON and transistor Q₂, Q₃Is OFF, a current that rotates clockwise (CW) is supplied to the turning unit drive motor 60, and the transistor Q₂, Q₃Is ON and transistor Q₁, Q₄Is OFF, the turning unit drive motor 60 is supplied with a current rotating in the counterclockwise direction (CCW).
Here, when the turning unit driving motor 60 rotates clockwise (CW), the page turning reading unit 1 moves forward, and when the turning unit driving motor 60 rotates counterclockwise (CCW), the page turning reading unit turns. 1 is set to be abdominal.
The rotation direction of the turning unit drive moke 60 is controlled by the CW signal and the CCW signal output from the ports PF6 and PF7 of the microcomputer 520, respectively.
[0128]
An encoder 152 that generates a pulse according to the rotation of the turning roller 2 is directly connected to the turning roller 2.
Here, the encoder 152 generates two pulse signals having different phases according to the amount of rotation of the turning unit drive motor 60 and the direction of rotation.
One is an A-phase encoder pulse ENCA, and the other is a B-phase encoder pulse ENCB.
The A-phase encoder pulse ENCA is input to the counter input terminal C1 of the microcomputer 520 via the frequency division multiplexer 524.
Thereby, the microcomputer 520 measures the pulse interval of the A-phase encoder pulse ENCA by a counter inside the microcomputer 520 (regulated by the oscillation frequency 10 MHz of the oscillator 525 of the microcomputer 520).
The input signal to the counter input terminal C1 is an interrupt input. During the processing of the interrupt program, the value of the pulse interval measurement data of the A-phase encoder pulse ENCA is read, and based on this data, the turn-over is performed. The calculation of the rotation speed of the unit drive motor 60, the calculation of the motor control amount by the proportional / integral control calculation, the output (data loading to the timer 521), and the like are performed.
[0129]
Specifically, an interrupt input signal is given to the counter input terminal C1 by dividing the output of the A-phase encoder pulse ENCA by 1, 2, 4, or 8 by the frequency division multiplexer 524 according to the target speed. .
Here, at the time of frequency division by one, the first reading sensor unit 9 is moved by 0.116 mm by one pulse of the encoder 152, and the speed is calculated inside the microcomputer 520 by the interruption interval.
Then, an output timer value is determined by a proportional / integral calculation process based on the calculated speed data.
The A-phase encoder pulse ENCA and the B-phase encoder pulse ENCB are input to the input terminal PC3 of the microcomputer 520 via the flip-flop 526, and are used for detecting a phase difference between the two, and are turned over by the phase difference. The rotation direction of the unit drive motor 60 is determined.
That is, when the state of the B-phase encoder pulse ENCB at the time of the rise of the A-phase encoder pulse ENCA is input to the port of the microcomputer 520, the rotation direction of the turning unit drive motor 60 is determined.
[0130]
Next, the speed control of the turning unit drive motor 60 will be described.
The speed control of the turning unit drive motor 60 is performed by PWM control.
[0131]
First, when the page turning reading unit 1 scans the scanner, that is, when the turning unit driving motor 60 rotates clockwise, the transistor Q₁Is turned on, and the transistor Q is output via the gate 527 by the PWM output from the timer 521.₄Is turned on / off to generate a potential difference between both terminals of the turning unit drive motor 60, and the turning unit drive motor 60 is rotated at a speed corresponding to the duty ratio of the PWM signal.
On the other hand, when the page-turning reading unit 1 returns, the transistor Q3 is turned on and the PWM output from the timer 521 outputs the transistor Q3 via the gate circuit 528, contrary to the above case.₂Is turned on / off to generate an opposite potential difference between both terminals of the turning unit drive motor 60, and the turning unit drive motor 60 is rotated at a speed corresponding to the duty ratio of the PWM signal.
Let
[0132]
【The invention's effect】
According to the present invention,A page input means for reading a book original to form an image of a read page and turning the pages of the book original into a book original reading apparatus; Image forming means for reading a two-page spread book document and forming a read image from the image formation start page designated by the page input means, so that the book document can be read regardless of the arrangement of pages or chapters in the book document. Copy from desired pagebe able to.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of a multi-function document scanner (MFDS) embodying the present invention.
FIG. 2 is a schematic cross-sectional view of a drive system of the MFDS.
FIG. 3 is a schematic plan view of a drive system of the MFDS.
FIG. 4 is a perspective view of an end of a page turning reading unit in the MFDS.
FIG. 5 is a sectional view of a roller end portion showing a support structure of a roller constituting the page turning reading unit.
FIG. 6 is a side view showing a lock release mode of the transport unit locking device in the MFDS.
FIG. 7 is a side view showing a lock start operation mode of the transport unit locking device.
FIG. 8 is a side view showing a lock completion mode of the transport unit locking device.
FIG. 9 is a perspective view showing an appearance of a pudding apparatus on which the MFDS is mounted.
FIG. 10 is a perspective view illustrating an appearance of a printer equipped with the MFDS when a transport unit is opened.
FIG. 11 is a perspective view showing the vicinity of an end of a first reading sensor unit provided in the page turning reading unit.
FIG. 12 is a side view showing the vicinity of an end of the first reading sensor unit.
FIG. 13 is a partially enlarged sectional view showing a support structure of an end of the first reading sensor unit.
FIG. 14 is a side view of the back side of the turning roller 2 of the page turning reading unit.
FIG. 15 is a cross-sectional view showing a structure of a center reference positioning portion of a document placing surface in the MFDS.
FIG. 16 is a plan view of an operation display board in the MFDS.
FIG. 17 is a schematic sectional view of the printer.
FIG. 18 is a plan view of a writing unit of the printer.
FIG. 19 is a diagram illustrating an operation of a switching claw for switching a transfer paper transport path of the printer.
FIG. 20 is a schematic sectional view of the page turning reading unit.
FIG. 21 is a cross-sectional view illustrating a configuration of the first reading sensor unit.
FIG. 22 is a schematic sectional view showing an operation mode of the MFDS.
FIG. 23 is an explanatory diagram of a turning transport belt in the MFDS.
FIG. 24 is a partial perspective view showing a page turning operation of the turning transport belt.
FIG. 25 is a diagram showing a pitch characteristic of a conveying force of the turning conveying belt.
FIG. 26 is a diagram showing a pitch characteristic of an attraction force of the turning transport belt.
FIG. 27 is a diagram showing an applied voltage characteristic of a conveying force of the turning conveying belt.
FIG. 28 is a diagram showing an applied voltage characteristic of an attraction force of the turning transport belt.
FIG. 29 is an electrical block diagram of the MFDS.
FIG. 30 is a mode transition diagram during the book document reading mode operation of the MFDS.
FIG. 31 is a mode transition diagram during the sheet document reading mode operation of the MFDS.
FIG. 32 is a flowchart showing a switching operation of each mode.
FIG. 33 is a flowchart showing an operation in the book original reading mode.
FIG. 34 is a timing chart showing an operation in a two-page spread continuous reading mode in the book document reading mode.
FIG. 35 is a timing chart showing an operation in a two-page spread one page reading mode in the book document reading mode.
FIG. 36 is a timing chart showing an operation in a case where the book is set so as to read from the right page of a book original in the double-page spread reading mode.
FIG. 37 is a block diagram of a circuit for delaying the transfer timing of data read in the two-page spread reading mode.
FIG. 38 is a timing chart showing the operation of a circuit for delaying the transfer timing of data read in the two-page spread reading mode.
FIG. 39 is a timing chart showing the operation of the double-sided mode in the two-page spread reading mode.
FIG. 40 is a flowchart showing a switching operation of a sheet original through mode in the sheet original reading mode.
FIG. 41 is a flowchart showing an operation in a one-sided reading mode in the sheet original through mode.
FIG. 42 is a timing chart showing the operation in the single-sided reading mode.
FIG. 43 is a flowchart showing an operation in the same position reading mode in the sheet original through mode.
FIG. 44 is a timing chart showing the operation in the same position reading mode.
FIG. 45 is a flowchart showing an operation of another position reading mode in the sheet original through mode.
FIG. 46 is a timing chart showing the operation in the separate position reading mode.
FIG. 47 is a flowchart showing an operation of a sheet original scanning mode in the sheet original reading mode.
FIG. 48 is a timing chart showing an operation in the sheet document scan mode.
FIG. 49 is a flowchart showing an operation of a sheet original manual opening / closing mode in the sheet original reading mode.
FIG. 50 is a timing chart showing the operation of the sheet original manual opening / closing mode.
FIG. 51 is a scanning control circuit diagram of the page turning reading unit.
[Explanation of symbols]
A: Multi-function document scanner (MFDS)
1: Page turn reading unit
1-A: Home position position
1-C: End position position
8. Turnover conveyor belt
9: Turning conveyor belt,
14 Second reading sensor unit
24 ... Center reference positioning part
52: Turning unit drive belt
60 ... Turning unit drive motor
61 Turn-over transport belt drive motor
92… Book manuscript
200 ... sheet manuscript,
300 ... Printer
310 ... Main control board
11 Turn-over transport belt drive control board
312 ... Turning unit drive control board
13. Operation display board
314: First image processing board
317: 2nd image processing board

Claims (2)

A page input means for reading a book original to form an image of a read page and turning the pages of the book original into a book original reading apparatus; An image forming means for reading a two-page spread book document and forming a read image from the image formation start page designated by the page input means. In a book document image forming apparatus which reads a book document to form an image of a read page and turns a page of the book document, page input means for designating one of a left page and a right page as an image formation start page of a spread book document. And an image forming means for reading a two-page spread book document and forming a read image from the image formation start page designated by the page input means.

Images