JP3660868B2 - Paper folding device - Google Patents

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JP3660868B2
JP3660868B2 JP2000365475A JP2000365475A JP3660868B2 JP 3660868 B2 JP3660868 B2 JP 3660868B2 JP 2000365475 A JP2000365475 A JP 2000365475A JP 2000365475 A JP2000365475 A JP 2000365475A JP 3660868 B2 JP3660868 B2 JP 3660868B2
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paper
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carry
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JP2002167120A (en
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泰 亀崎
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Kyocera Document Solutions Inc
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Kyocera Mita Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、用紙に折り処理、一般的にはいわゆる中折り処理を施す用紙折り装置、特に、静電複写機、レーザプリンタ等の画像形成機における画像形成機本体に装着され、画像形成機本体から搬入された画像形成済みの用紙に折り処理を施す用紙折り装置に関する。
【0002】
【従来の技術】
用紙折り装置、例えば、静電複写機における複写機本体に付設され、複写機本体から搬入された画像形成済みの用紙に折り処理を施す用紙折り装置の一つの典型例は、用紙搬入路を表裏方向に挟んで配設された用紙折り手段と、用紙搬入路の、用紙折り手段よりも下流位置に配置されて搬入された用紙の先端を受け止める受止部材と、受止部材を用紙搬入路に沿って移動させる受止部材移動手段と、用紙搬入路の幅方向に間隔をおいて配置された一対の幅合わせ部材と、用紙搬入路に搬入された用紙の幅合わせ及び斜行補正を行なうために一対の幅合わせ部材を該幅方向に往復移動させる幅合わせ部材移動手段とを備えている。用紙折り手段は、用紙搬入路の裏側に配設されたクランク機構と、クランク機構に駆動連結された突き出し板である用紙折り用のブレードと、用紙搬入路の表側に配設された折りローラ対とを備えている。受止部材移動手段は、用紙の移動方向に間隔をおいて配置された駆動プーリ及び被駆動プーリと、駆動プーリ及び被駆動プーリに巻き掛けられた無端ベルトと、駆動プーリを正逆回転駆動させる電動モータとを備えている。受止部材は用紙搬入路の表面から突出するように無端ベルトに取り付けられ、搬送方向に往復移動させられる。幅合わせ部材移動手段は、用紙搬入路の裏側に配設された一対のラック部材と、ラック部材の各々のラックに噛み合わされたピニオンと、ピニオンを正逆回転駆動させる電動モータとを備えている。一対のラック部材は、用紙の移動方向に間隔をおいて用紙の移動方向に対し水平方向に直交するよう配置されている。幅合わせ部材は、ラック部材の各々に装着され、用紙搬入路の表側に突出するよう配置されている。なお、用紙搬入路は直立に近い状態に配設されている。
【0003】
一般的に一対の幅合わせ部材による用紙の幅合わせや斜行補正は、用紙の全長にわたって行なうのが効果的であり、特にその重心位置である中央部に作用させることが重要である。しかしながら、用紙に中折り装置においては、その中央に比較的大きな折りローラ対が配置されているため、上記最適な構成はとり難い。このような実状から、従来においては、受止部材移動手段を構成する一対のラック部材、ピニオン及び電動モータは、用紙搬入路における、用紙折り手段を構成するクランク機構及びブレードの下流側位置に配置されている。そして一対の幅合わせ部材は、用紙搬入路の表側に配設された折りローラ対の上方を跨いで上流方向に延在し、各々の先端部はローラ対の上流側位置に位置付けられるよう構成されている。用紙の用紙搬入路への搬入は自由落下により行なわれる。用紙搬入路に搬入された用紙は受止部材によってその先端が受け止められて停止させられる。一対のラック部材が上記ラックアンドピニオン機構により該幅方向に往復移動させられて用紙の幅合わせ及び斜行補正が行なわれた後、受止部材が無端ベルトの回転により、用紙が所定の折り位置に達するまで移動させられる。用紙の移動が停止された後、再び上記したとおりにして用紙の幅合わせが行なわれる。クランク機構の作動によりブレードが用紙の中央を折りローラ対のニップ部に向けて強制移動させる。強制移動させられた用紙はローラ対によって折られながら搬送され、排出トレイに排出される。
【0004】
【発明が解決しようとする課題】
上記した従来の用紙折り装置において、一対の幅合わせ部材は、用紙搬入路の表側に配設された折りローラ対の上方を跨いで上流方向に延在し、各々の先端部は折りローラ対の上流側位置に位置付けられるよう構成されている。すなわち、一対の幅合わせ部材は、折りローラ対の下流側位置においてはラック部材に取り付けられているが、折りローラ対の上流側位置においてはフリーの状態にあり、いわゆる片持ちの構成となっている。その結果、用紙の幅合わせ及び斜行補正が行なわれるのは実質上、折りローラ対の下流側位置においてのみであり、折りローラ対の上流側位置における用紙の幅合わせ及び斜行補正の効果は十分とはいえず、トータル的には、所望のとおり十分確実に行なわれることは期待できない。用紙の斜行補正は主として、用紙の先端が自重により受止部材に接することにより行なわれるが、その効果は十分なものとはいえない。また幅合わせ部材の各々が大型化するので、用紙折り装置のコンパクト化を図ることができない。上記用紙折り装置において、幅合わせ部材の各々及び幅合わせ部材の各々とラック部材との連結部等の剛性をアップすることにより、上記技術的課題を解決する手段も考えられるが、重量の増加及びコストアップを招くことになる。上記技術的課題を解決する他の手段として、用紙搬入路における、折りローラ対の上流側及び下流側の両方に、それぞれ幅合わせ部材を配設することも考えられるが、部品点数が大幅に増加し、構成が複雑になると共に幅合わせ部材の制御も複雑化し、コストが大幅にアップする。
【0005】
また、上記した従来の用紙折り装置においては、用紙搬入路に搬入された用紙が受止部材によって受け止められた後、及び、用紙が所定の折り位置に停止させられた後に、用紙の幅合わせ及び斜行補正が行なわれるので、用紙の搬送、停止、搬送が繰り返され、用紙が用紙搬入路に搬入されてから上記折り処理が開始されるまでの時間が長く、結果として折り処理の時間が長くなり、高速化が望めない。
【0006】
本発明の目的は、用紙の幅合わせ及び斜行補正が所望のとおり十分確実に行なわれることを可能にする、新規な用紙折り装置を提供することである。
【0007】
本発明の他の目的は、用紙の折り処理の時間を従来よりも短縮して高速化することを可能にする、新規な用紙折り装置を提供することである。
【0008】
本発明の更に他の目的は、従来よりもコンパクトな構成及び低コストで、上記目的を達成することを可能にする、新規な用紙折り装置を提供することである。
【0009】
【課題を解決するための手段】
本発明の一局面によれば、
用紙搬入路を表裏方向に挟んで配設された用紙折り手段と、用紙搬入路における、用紙折り手段の下流側位置に配置されて搬入された用紙の先端を受け止める受止部材と、受止部材を用紙搬入路に沿って移動させる受止部材移動手段と、用紙搬入路の幅方向に間隔をおいて配置された一対の幅寄せ部材と、用紙搬入路に搬入された用紙の幅合わせ及び斜行補正を行なうために一対の幅合わせ部材を該幅方向に往復移動させる幅合わせ部材移動手段とを備えている用紙折り装置において、
一対の幅合わせ部材は、用紙搬入路における、用紙折り手段の上流側位置に配置され、
用紙搬入路の上流位置に配置されて用紙搬入路に用紙を搬入させる、駆動ローラと被駆動ローラとからなる搬入ローラ対と、駆動ローラを回転駆動させる駆動ローラ駆動手段と、被駆動ローラをニップ位置とニップ解除位置に選択的に移動させうるアクチュエータ手段と、アクチュエータ手段、駆動ローラ駆動手段、幅合わせ部材移動手段及び受止部材移動手段を制御する制御手段とを備え、制御手段は、用紙が用紙搬入路に搬入されてから所定の折り位置に停止させられるまでの間における用紙の移動動作継続中に用紙の幅合わせ及び斜行補正が行われるように、アクチュエータ手段、駆動ローラ駆動手段、幅寄せ部材移動手段及び受止部材移動手段を制御する、
ことを特徴とする用紙折り装置、が提供される。
制御手段は、用紙の、用紙搬入路への搬入に際しては、駆動ローラ駆動手段を作動させて搬入ローラ対により用紙を受止部材に向けて搬入させ、用紙の先端が受止部材の直上流位置に達すると同時に受止部材移動手段を作動させて受止部材を用紙の移動速度と同じ速度で用紙の移動方向に移動させると同時に、アクチュエータ手段を作動させて被駆動ローラをニップ解除位置に移動させかつ幅合わせ部材移動手段を作動して幅合わせ部材部材の各々を該幅方向に往復作動させて用紙の幅合わせ及び斜行補正を行なう動作を複数回繰り返し行わせる、ことが好ましい。
制御手段は、用紙の、用紙搬入路への搬入に際しては、アクチュエータ手段を作動させて被駆動ローラをニップ解除位置に移動させると共に駆動ローラ駆動手段を作動させて駆動ローラのみにより用紙を受止部材に向けて搬入させ、用紙の先端が受止部材の直上流位置に達すると同時に受止部材移動手段を作動させて受止部材を用紙の移動速度と同じ速度で用紙の移動方向に移動させると同時に幅合わせ部材移動手段を作動して幅合わせ部材部材の各々を該幅方向に往復作動させて用紙の幅合わせ及び斜行補正を行なう動作を複数回繰り返し行わせる、ことが好ましい。
制御手段は、用紙の、用紙搬入路への搬入に際しては、受止部材移動手段を作動させて受止部材をホームポジションから僅かに下流方向に移動させて待機させる、ことが好ましい。
制御手段は、用紙が折り位置に停止されるように受止部材移動手段の作動を停止して移動中の受止部材を停止させ、同時に幅合わせ部材移動手段の作動を停止して用紙の幅合わせ及び斜行補正動作を停止させる、ことが好ましい。
本発明の他の局面によれば、
用紙搬入路を表裏方向に挟んで配設された用紙折り手段と、用紙搬入路における、用紙折り手段の下流側位置に配置されて搬入された用紙の先端を受け止める受止部材と、受止部材を用紙搬入路に沿って移動させる受止部材移動手段と、用紙搬入路の幅方向に間隔をおいて配置された一対の幅寄せ部材と、用紙搬入路に搬入された用紙の幅合わせ及び斜行補正を行なうために一対の幅合わせ部材を該幅方向に往復移動させる幅合わせ部材移動手段とを備えている用紙折り装置において、
一対の幅合わせ部材は、用紙搬入路における、用紙折り手段の上流側位置に配置され、
幅合わせ部材移動手段及び受止部材移動手段を制御する制御手段を備え、用紙搬入路は、用紙搬入路に搬入された用紙が用紙搬入路に沿って自由落下してその先端が受止部材に受け止められて停止するような急傾斜に設定され、制御手段は、受止部材に受け止められた 用紙が受止部材によって移動させられてから所定の折り位置に停止させられるまでの間における用紙の移動動作継続中に用紙の幅合わせ及び斜行補正が行われるように、幅寄せ部材移動手段及び受止部材移動手段を制御する、
ことを特徴とする用紙折り装置、が提供される。
【0011】
【発明の実施の形態】
以下、本発明に従って構成された用紙折り装置の好適な実施の形態を、添付図面を参照して更に詳細に説明する。図1を参照して、画像形成機である静電複写機200の複写機本体202に付設されるフィニッシャ100は、直方体形状のハウジング102を備えている。ハウジング102の、複写機本体202の一側部と対向する一側部には用紙搬入口104が設けられている。ハウジング102内には、用紙搬入口104からハウジング102の他側部方向に向かって延びる第1用紙搬送路106が配設されている。ハウジング102内にはまた、第1用紙搬送路106から分岐してステイプル処理装置108に向かって延びる第2用紙搬送路110が配設されている。第1用紙搬送路106と第2用紙搬送路110との分岐部には分岐爪112が配設されている。第1用紙搬送路106には搬送ローラ対106a及び106bが配設され、第2用紙搬送路110には搬送ローラ対110aが配設されている。第1用紙搬送路106の下流端(排出端)には排出ローラ対114が配設されている。ハウジング102の排出側である他側部には排出トレイ116が装着されている。複写機200において画像が形成された用紙(記録紙)に後処理を行なわない場合には、分岐爪112は図1に示す位置から図示しない他の位置に切り換えられ、用紙搬入口104から搬入された用紙は、搬送ローラ対106a及び106bにより第1用紙搬送路106を通して排出ローラ対114に向けて搬送され、排出ローラ対114により排出トレイ116に排出される。一方、該用紙にステイプル処理及び/又は折り処理を行なう場合には、分岐爪112は図1に示す位置に切り換えられ、用紙搬入口104から搬入された用紙は、搬送ローラ対106a、106b及び110aにより第2用紙搬送路110を通してステイプル処理装置108に搬送される。
【0012】
ステイプル処理装置108において、例えば、いわゆる中綴じと称せられているステイプル処理(搬送方向中央部を綴じるステイプル処理)が行なわれた用紙束は、ステイプル処理装置108から排出ローラ対114により排出トレイ116に排出される場合と、フィニッシャ100の最下部であって、ステイプル処理装置108よりも下流側に配置された本発明による用紙折り装置2に搬送される場合とがある。用紙折り装置2に搬送された用紙束は用紙折り装置2によって、いわゆる中折りと称せられる折り処理が遂行される。他方、用紙に折り処理のみを行なう場合には、ステイプル処理装置108に搬送された用紙は、ステイプル処理装置108においてステイプル処理が行なわれることなく、用紙折り装置2に搬送される。
【0013】
次に本発明による用紙折り装置2について説明する。用紙折り装置2は、ハウジング102の前後方向(図1及び図2において表裏方向)に間隔をおいて配置され側板3(図2、図4及び図5においては、そのうちの一方のみが示されている)間に配設されている。側板3の各々は鋼板から形成されている。図2を参照して、用紙折り装置2は、用紙搬入路4と、用紙搬入路4の用紙搬送方向中央における用紙搬入路裏側に配設されたクランク機構6と、クランク機構6に駆動連結された突き出し板である折り用ブレード8と、用紙搬入路4の表側に配設された折りローラ対10とを備えている。用紙搬入路4の表面は、実施形態においては、水平面に対し30°に近い30°以上の傾斜角度を有するよう配設されている。ブレード8は、クランク機構6の回転により折りローラ対10のニップ部に近接した作用位置と、用紙搬入路4の裏側に退避した非作用位置との間を往復移動させられる。クランク機構6の回転体は折りブレード作動用の電動モータM1に図示しない動力伝達機構を介して駆動連結されている。折りローラ対10は、駆動ローラ10aと、駆動ローラ10aに図示しないばね手段により圧接されて連れ回りさせられる被駆動ローラ10bとから構成されている。駆動ローラ10aは電動モータM2に図示しない動力伝達機構を介して駆動連結されている。折りローラ対10の下流側の位置には、排出路15、排出ローラ対16、排出トレイ17が配設されている。排出トレイ17には押圧部材18が配設され、排出トレイ17内に排出された用紙束を上方から抑えるよう構成されている。排出ローラ対16は、駆動ローラ16aと被駆動ローラ16bとから構成され、駆動ローラ16aは電動モータM2に図示しない動力伝達機構を介して駆動連結されている。クランク機構6、ブレード8及び折りローラ対10は、用紙搬入路4を表裏方向に挟んで配設された用紙折り手段を構成し、用紙折り手段は、それ自体周知の構成を利用することでよく、更なる説明は省略する。
【0014】
用紙搬入路4における、上記用紙折り手段の上流側位置であって、用紙搬入路4のほぼ最上流位置には、用紙搬入路4に用紙を搬入させるための搬入ローラ対20が配設されている。搬入ローラ対20は、駆動ローラ20aと、駆動ローラ20aに連れ回りさせられる被駆動ローラ20bとから構成されている。駆動ローラ20aは、折りローラ対10の駆動ローラ10aを回転駆動させる上記電動モータM2に図示しない動力伝達機構を介して駆動連結されている。したがって、電動モータM2が回転駆動されると、折りローラ対10の駆動ローラ10aと、排出ローラ対16の駆動ローラ16a及び搬入ローラ対20の駆動ローラ20aとが同時に回転駆動させられる。電動モータM2は正逆回転自在である。電動モータM2及び電動モータM2と駆動ローラ20aを駆動連結する図示しない該動力伝達機構は、搬入ローラ対20の駆動ローラ20aを回転駆動させる駆動ローラ駆動手段を構成する。被駆動ローラ20bに関連してソレノイドSOL(図3参照)が配設されている。アクチュエータ手段であるソレノイドSOLは、被駆動ローラ20bをニップ位置とニップ解除位置に選択的に移動させることができる。
【0015】
用紙搬入路4の、上記用紙折り手段よりも上流位置には、用紙搬入路4に搬入された用紙の幅合わせ及び斜行補正を行なうための一対の幅合わせ部材22(図2〜図5においては、その片方のみが示されている)が配置されている。一対の幅合わせ部材22は、用紙搬入路4の幅方向に間隔をおいて配置され、後述するラックアンドピニオン機構を介して電動モータM3に駆動連結されている。電動モータM3は正逆回転自在なステッピングモータから構成されている。
【0016】
用紙搬入路4における、上記用紙折り手段の下流側位置には、用紙搬入路4に搬入された用紙の先端を受け止める受止部材26が配設されている。受止部材26に関連して、駆動プーリ28及び被駆動プーリ30が用紙の移動方向に間隔をおいて配置され、駆動プーリ28及び被駆動プーリ30には無端ベルト32が巻き掛けられている。無端ベルト32は用紙搬入路4の幅方向中央を搬送方向に延在するよう配置されている。用紙搬入路4の、無端ベルト32を幅方向に挟んだ両側には、平坦な上面を有する用紙受け台36が配設されている。板状部材から形成することができる用紙受け台36の上面は、無端ベルト32よりも上方に位置付けられ、用紙は該上面に沿って移動させられる。したがって、用紙受け台36の上面は、用紙搬入路4の一部を構成する。用紙受け台36の用紙入口部には、案内部36aが形成されている。案内部36aは、用紙受け台36の幅方向の両端から上方に延びる側壁と、側壁の上端間を幅方向に延在する上壁とから構成されている。案内部36aは、用紙搬入路4の幅方向中央を移動する受止部材26と干渉しないよう、該幅方向中央部が受止部材26の移動軌跡よりも上方に位置付けられている。駆動プーリ28は電動モータM4に図示しない動力伝達機構を介して駆動連結されている。電動モータM4は正逆回転自在なステッピングモータから構成されている。
【0017】
受止部材26は用紙搬入路4の表面から突出するように無端ベルト32に取り付けられ、用紙の移動方向に往復移動させられる。受止部材26の、用紙搬入路4の表面から突出した部分には、用紙搬入路4の表面から垂直に上方に延び出す用紙受止壁と、用紙受止壁の上端から上流方向に延び出す張出壁と、用紙受止壁の下端から下流方向に延び出す底壁とを備えている。用紙受止壁は用紙の搬送方向に直角にかつ用紙搬入路4の幅方向に延在するよう配置される。用紙搬入路4の表面と、受止部材26の用紙受止壁及び張出壁との間には、用紙搬入路4の幅方向に見て、ほぼチャンネル形状をなす、用紙の受止部が用紙搬入路4の幅方向に延在するよう形成される。電動モータM4、駆動プーリ28、被駆動プーリ30及び無端ベルト32等は、受止部材26を用紙搬入路4に沿って移動(往復移動)させる受止部材移動手段を構成する。
【0018】
図3〜図5を参照して、用紙搬入路4の裏面側であって、上記用紙折り手段よりも上流位置には、静止枠40が、用紙搬入路4の幅方向に延在するよう側板3間に装着されている。鋼板から形成されている静止枠40は、平坦な底壁40aと、底壁40aの、該搬送方向両端から直立する側壁40bと、側壁40bのの各々の上端から相互に反対方向に延び出すフランジ40cとを有し、横断面がほぼチャンネル形状をなす。フランジ40cの各々の上面は実質上、同じ平面上に位置付けられている。静止枠40の底壁40aの該幅方向中央部には、ピニオン42が配置されている。ピニオン42の軸42aは、底壁40aの裏面側に取り付けられた上記電動モータM3の駆動軸により構成されている。上記側板3間には案内軸44が、該幅方向にピニオン42の軸42aよりも若干上方位置を通って延在するよう配置されている。案内軸44には一対のラック部材46が、案内軸44に沿って該幅方向に移動自在に支持されている。ラック部材46の各々の片側に形成されたラック46aは、ピニオン42の、用紙搬送方向両側から噛み合わされている。ラック部材46の各々には板形状をなす被案内フランジ46bが形成されている。被案内フランジ46bは、静止枠40の底壁40aに設けられた一対のガイド部材48のガイド部に、該幅方向に移動自在に嵌合支持されている。ガイド部材48のガイド部は横断面がチャンネル形状をなしている。
【0019】
薄板部材から形成されている一対の幅合わせ部材22は、一定の幅で該搬送方向に延在する平坦な底壁22aと、底壁22aの該幅方向一端から直立する側壁22bと、側壁22bの上端から他端に向かって底壁22aに間隔をおいて平行に延在する天壁22cとを備え、横断面が該幅方向に比較的細長いチャンネル形状をなしている。幅合わせ部材22の各々の底壁22aには、その該幅方向一端から下方に延び出すフランジ22dが一体に形成されている。幅合わせ部材22の各々は、フランジ22dが案内軸44に移動自在に嵌合されかつ、対応するラック部材46の側端に当接された状態で相互に軸方向の相対移動ができないように、適宜の係止手段あるいは連結手段、例えばE型止め輪等により連結される。幅合わせ部材22の各々は、対応するラック部材46と共に一体に案内軸44に沿って移動可能となる。幅合わせ部材22の各々は、チャンネル形状の開放側が相互に該幅方向に対向するよう位置付けられ、各々の底壁22aは、静止枠40のフランジ40cの各々の上面上に位置付けられ、該幅方向に相対移動自在である。幅合わせ部材22の各々の底壁22aの上面は、実質上同一平面上に位置付けられ、かつ相互に該幅方向に間隔をおいて用紙搬入路4の一部を規定する。幅合わせ部材22の各々の底壁22aの上面はまた、用紙受け台36の上面と実質上同一平面上に位置付けられている。電動モータM3によってピニオン42が正逆回転駆動させられると、幅合わせ部材22の各々は、対応するラック部材46を介して該幅方向に往復移動させられる。用紙の幅合わせ及び斜行補正は、幅合わせ部材22の各々の側壁22bによって遂行される。ピニオン42と、対応するラック部材46とは、ラックアンドピニオン機構を構成する。電動モータM3及びラックアンドピニオン機構は、用紙搬入路4に搬入された用紙の幅合わせ及び斜行補正を行なうために一対の幅合わせ部材22を該幅方向に往復移動させる幅合わせ部材移動手段を構成する。
【0020】
搬入ローラ対20の上記駆動ローラ20aは、静止枠40内の、上記ラックアンドピニオン機構よりも上流側を、該幅方向に延在して側板3の各々に回動自在に支持された駆動軸20Aに一体回転されるよう、軸方向に間隔をおいて2個装着されている。駆動軸20Aは上記電動モータM2に図示しない動力伝達機構を介して駆動連結されている。駆動ローラ20aの外周面の一部は、幅合わせ部材22の各々の底壁22aの上面から上方に突出して位置付けられている。幅合わせ部材22の各々の底壁22aには、幅寄せ部材22の各々の該幅方向の往復移動の際、駆動ローラ20aに干渉しないよう、切欠き22dが形成されている。
【0021】
幅合わせ部材22の各々よりも上方の位置には、支持部材50が側板3の各々に固定された軸52に回動自在に支持されている。適宜の合成樹脂から一体に成形することができる支持部材50は、所定の厚さを有すると共に平面から見てほぼ矩形状に形成され、幅合わせ部材22の各々の上方位置において側板3の間を該幅方向に延在するよう配置されている。支持部材50は、下流側端部の両側部が上記軸52に回動自在に支持され、上流側の端部には該幅方向に間隔をおいて2個の上記被駆動ローラ20bが回転自在に支持されている。被駆動ローラ20bの各々は、支持部材50に装着された板ばね54の先端部に支持されている。板ばね54は一定の幅をもって該搬送方向に延在し、その下流側端部が支持部材50に装着され、フリーの状態の上流側端部の幅方向両端から垂下するよう形成された一対のフランジ間に被駆動ローラ20bが回転自在に支持されている。支持部材50の上流側端部における両端部と、その近傍に位置する側板3に形成されたフランジ3aとの間には、一対の圧縮コイルばね56(図3においては、そのうちの1個のみが示されている)が介在されている。支持部材50の直上流位置であって、幅合わせ部材22の各々の上方位置には、軸58が側板3の間を該幅方向に延在するよう、側板3の各々に回転自在に支持されている。軸58の一端部は、対応する側板3の外方に突出し、該突出部には連結レバー60が固着されている。該側板3には上記ソレノイドSOLが配設され、ソレノイドSOLのプランジャ62と連結レバー60とはピン結合されている。軸58の、側板3の内側における両端部にはストップ&作動レバー64が固着され、ストップ&作動レバー64の端面は、支持部材50の、対応する下面に形成された当接面に当接しうるよう位置付けられている。
【0022】
支持部材50の上流側端部は、圧縮コイルばね56の各々によって、軸52まわりに図3において時計方向に回動するよう付勢され、その上記当接面の各々が、対応するストップ&作動レバー64の端面に圧接され、該回動が阻止される。ストップ&作動レバー64の各々は、OFF(作動停止)状態のソレノイドSOLのプランジャ62と、ソレノイドSOLの本体部との間に形成された図示しないストッパにより図示のHP(ホームポジションの略称)に位置付けられる。このような構成及び作用により、被駆動ローラ20bの各々は、板ばね54の付勢力によって、対応する駆動ローラ20aに圧接される。ソレノイドSOLがON(作動)されると、プランジャ62が所定のストロークだけ吸引され、連結レバー60、軸58、ストップ&作動レバー64が図3において時計方向に回動させられる。支持部材50の上流側端部が、圧縮コイルばね56の各々のばね力に抗して持ち上げられ、支持部材50は軸52まわりに所定の角度だけ反時計方向に回動させられる。これにより、被駆動ローラ20bは図3に示すニップ位置から図示しないニップ解除位置に移動させられる。駆動ローラ20aと被駆動ローラ20bとの隙間は、搬入される用紙束の最大厚さ以上に規定される。ソレノイドSOLがOFFされるとプランジャ62の吸引が解除され、支持部材50は圧縮コイルばね56の各々のばね力によって軸52まわりに時計方向に回動させられ、被駆動ローラ20bの各々は図3に示すニップ位置に復帰させられる。圧縮コイルばね56の各々は、該復帰動作を迅速に行わせる機能を有している。
【0023】
図2及び図3を参照して、静止枠40内の上流側の側壁40bには、用紙搬入検知センサS1が配設されている。用紙搬入検知センサS1は、用紙搬入路4に搬入された用紙の先端を検出することにより用紙の搬入を検知するセンサであり、反射型フォトセンサから構成されている。静止枠40内の底壁40aの、該幅方向の一端部(図2及び図3において手前側端部、図4及び図5において右端部)には、幅合わせ部材22の各々のHPを検知する幅合わせ部材HP検知センサS2が配設されている。幅合わせ部材HP検知センサS2は、片側のラック部材46に形成された垂下壁46cの端壁を検知することにより、幅合わせ部材22の各々のHPを検知するセンサであり、透過型フォトセンサから構成されている。用紙受け台36の上流側端部の下方位置であって、該幅方向中央部には、受止部材26のHPを検知する受止部材HP検知センサS3が配設されている。受止部材HP検知センサS3は、受止部材26の用紙受止壁と底壁との間に形成されるエッジを検知することにより、受止部材26のHPを検知するセンサであり、反射型フォトセンサから構成されている。用紙受け台36の、上記受止部材HP検知センサS3配設位置よりも下流側の位置における下方位置であって、該幅方向中央部には、用紙受け台36に搬入された用紙を検知する用紙有無検知センサS4が配設されている。用紙有無検知センサS4は搬入された用紙の先端を検知することにより用紙の有無を検知するセンサであり、反射型フォトセンサから構成されている。
【0024】
図6に示されているように、上記用紙折り装置2には制御手段(コントローラ)70が備えられている。制御手段70は、マイクロコンピュータによって構成されており、制御プログラムに従って演算処理する中央処理装置(CPU)、制御プログラムを格納するROM及び演算結果等を格納する読み書き可能なRAM、タイマ、カウンタ、入力インターフェース及び出力インターフェース等を備えている。このように構成された制御手段70の入力インターフェースには、上記用紙搬入検知センサS1、幅合わせ部材HP検知センサS2、受止部材HP検知センサS3、用紙有無検知センサS4、電動モータM1〜M4の回転量を検出する図示しない検出器、その他の検出器、スイッチ等からの検出信号が入力され、出力インターフェースから電動モータM1〜M4、ソレノイドSOL等に制御信号を出力する。また制御手段70は、外部制御手段である複写機本体202の図示しない制御手段及びステイプル処理装置108の図示しない制御手段と接続されており、これらの制御手段から所定の制御信号が入力される。複写機本体202の制御手段には、操作手段に配設された複写開始キー、用紙のサイズ(搬送方向長さ)設定キー、用紙の折り処理を指定するための折り処理設定キー(いずれも図示せず)等から処理情報が入力される。
【0025】
図示の用紙折り装置2は以上のように構成されており、以下、その作動について説明する。なお、用紙折り装置2においては、上記したように、ステイプル処理が行なわれた用紙束に折り処理を行なう場合と、1枚の用紙に折り処理を行なう場合とがあるが、いずれの場合においても本発明による作用効果は実質上、同じである。以下の説明においては、ステイプル処理装置108において中綴じが行なわれた用紙束の搬入を例にして説明する。
【0026】
主として図2、図6及び図7を参照して、制御手段70には、外部制御手段である複写機本体202の制御手段から、設定された用紙のサイズ情報が入力される。ステイプル処理装置108によるステイプル処理が終了すると、ステイプル処理装置108に配設された搬送ローラ対118(図1参照)が駆動されて、中綴じされた用紙束の、用紙折り装置2への搬送が開始される。搬送ローラ対118の駆動開始信号が制御手段70に入力される。制御手段70に搬送ローラ対118の駆動開始信号が入力されると、制御手段70は電動モータM2を駆動して、搬送ローラ対20の回転を開始させる(S−1)。なお、電動モータM2の駆動により、搬送ローラ対20と同時に折りローラ対10及び排出ローラ対16も同時に回転させられる。制御手段70はまた、上記サイズ情報に基づいて、電動モータM3を所定量だけ正転駆動して停止させる(S−2)。この動作により、幅合わせ部材22の各々は、HPから相互に接近する方向に所定量だけ移動させられ、指定されたサイズに適した所定の用紙受入幅が設定される。幅合わせ部材22の各々のHPは、幅合わせ部材HP検知センサS2からの信号に基づいて規定される。
【0027】
用紙搬入検知センサS1が搬送ローラ対118により搬送された用紙束の先端を検知すると(S−3)、制御手段70は、電動モータM4を所定量だけ駆動して停止させる(S−4)。無端ベルト32は、図2において反時計方向に所定量だけ回転駆動されて停止させられる。この動作によって、予め、用紙受け台36の上流側端部のHP(図2において実線で示される位置)に位置付けられていた受止部材26は、HPから僅かに下流側の所定の待機位置まで移動させられて停止する。受止部材26のHPは、受止部材HP検知センサS3からの信号に基づいて規定される。用紙搬入路4に搬入させられた用紙束は、搬送ローラ対20によって下流方向に搬送される。制御手段70は、受止部材HP検知センサS3が該用紙束の先端を検知して、用紙束の先端が、受止部材26の直上流位置である移動前のHPまで進入させられたと判断すると(S−5)、電動モータM4を駆動させる(S−6)。無端ベルト32は、図2において反時計方向に回転駆動させられ、受止部材26は無端ベルト32と一体に下流方向に移動させられる。無端ベルト32の移動速度、したがって受止部材26の移動速度は、用紙束の移動速度、すなわち、搬送ローラ対20の駆動ローラ20aの周速度と実質上、同じ速度に設定されていることが重要である。受止部材26は、用紙束の先端よりも僅かに下流側を用紙束と同じ速度で用紙束と共に移動させられるので、用紙束の円滑な搬送が保証される。用紙束の先端と受止部材26の距離が離れすぎていると、用紙搬入路4の傾斜角度が急な場合に、駆動ローラ20aと被駆動ローラ20bとのニップを解除した瞬間に用紙束が滑り落ち、受止部材26と衝突して大きく斜めにずれることがある。しかしながら上記したように、受止部材26を、用紙束の先端から僅かに離れた位置で等速度で移動させることにより、このような不具合を防止することができる。
【0028】
制御手段70は、用紙有無検知センサS4が、上記のとおりにして移動させられる用紙束の先端を検知して、用紙束が用紙幅合わせ開始位置まで進入したと判断すると(S−7)、ソレノイドSOLをONさせて、搬送ローラ対20の被駆動ローラ20bを駆動ローラ20aから離隔させ、ニップを解除させる(S−8)。用紙束は、搬送ローラ対20のニップから開放されて駆動ローラ20aのみにより搬送させられる。制御手段70は、同時に電動モータM3を所定量だけ正逆回転駆動させて停止させ(S−9)、幅合わせ部材22の各々を相互に接近、離隔する方向に往復移動させる。この動作により移動中の用紙束の幅合わせ及び斜行補正が遂行される。このような幅合わせ及び斜行補正動作は、用紙束が搬送ローラ対20のニップから開放されて、搬送ローラ対20の駆動ローラ20aに乗せられた状態で、かつ、用紙束の先端が実質上、受止部材26によって支えられて移動させられる状態で遂行されるので、容易かつ確実に遂行される。上記幅合わせ及び斜行補正動作は、移動させられる用紙束が所定の折り処理位置に達するまで繰り返し遂行される(S−9、S−10)。用紙束が所定の折り処理位置に達したか否かの判断は、電動モータM4の回転数を検出することによって行なうことができる。
【0029】
制御手段70は、電動モータM4が所定の回転数だけ回転して、用紙束が所定の折り処理位置に達したと判断すると、電動モータM4の駆動を停止させる(S−11)。電動モータM4の駆動の停止により無端ベルト32の回転駆動が停止させられ、受止部材26及び用紙束は所定の折り処理位置に停止させられる。このき、ソレノイドSOLのON作動及び電動モータM2の回転駆動は継続されているので、搬入ローラ対20のニップが解除された状態で駆動ローラ20aは回転させられている。用紙束が所定の折り処理位置に達すると同時に、制御手段70は電動モータM1を駆動してクランク機構6を作動させて折り処理(中折り処理)の遂行を開始し、所定のタイミングで電動モータM4を逆転駆動させて受止部材26を上流方向に移動させて用紙束の先端(進入時の先端)を上流方向に押し込む等の動作を含む、それ自体は周知の形態により折り処理を行なう(S−12)。なお、折り処理それ自体の構成及び作用は周知の形態を利用することでよく、また本発明の特徴をなすものではないので説明は省略する。制御手段70は、用紙の折り処理が終了したと判断すると(S−13)、電動モータM2の駆動を停止させる(S−14)。折りローラ対10、排出ローラ対16及び搬入ローラ対20の回転が停止する。なお、用紙の折り処理が終了したか否かの判断は、例えば、排出ローラ対16の直下流位置に配置された図示しない排紙検知スイッチが用紙束の後端の通過を検知することにより行なうことができる。制御手段70は、次にソレノイドSOLをOFFさせて搬入ローラ対20のニップを復帰させて、折り処理の動作を終了する。
【0030】
本発明による上記用紙折り装置2によれば、一対の幅合わせ部材22は、用紙搬入路4における、用紙折り手段の上流側位置に配置されているので、従来装置におけるような、用紙折り手段の折りローラ対10の上方を跨いで延在するような片持ち構造とすることなく、実質上、用紙の搬送方向中央部付近を可能な限り搬送方向に長い幅合わせ部材22の各々によって幅合わせ及び斜行補正を遂行できるので、用紙の幅合わせ及び斜行補正が所望のとおり十分確実に行なわれることを可能にするものである。また部品点数も最小限で構成もシンプル化され、コストダウンが可能になる。更にはまた、用紙の幅合わせ及び斜行補正動作の制御も簡単かつ容易となり、この面においてもコストダウンが可能になる。また、上記用紙折り装置2においては、制御手段70は、用紙が用紙搬入路4に搬入されてから所定の折り位置に停止させられるまでの間における用紙の移動動作継続中に用紙の幅合わせ及び斜行補正が行われるように、ソレノイドSOLからなるアクチュエータ手段、電動モータM2を含む駆動ローラ駆動手段、電動モータM3を含む幅合わせ部材移動手段及び電動モータM4を含む受止部材移動手段を制御するよう構成されているので、用紙の幅合わせ及び斜行補正が最も効率的に遂行され、その結果、トータル的に用紙の折り処理の時間を従来よりも短縮して高速化することを可能にするものである。更にはまた、幅合わせ部材22の各々の構成を従来よりもコンパクト化することが可能になり、また幅合わせ部材22の各々とラック部材46との連結部等の剛性を必要以上にアップする必要もなくなるので、全体として従来よりもシンプルかつコンパクトな構成及び低コストで、上記目的を達成することを可能にするものである。
【0031】
以上、本発明を実施形態に基づいて添付図面を参照しながら詳細に説明したが、本発明は上記実施形態に限定されるものではなく、本発明の範囲を逸脱することなく、更に他の種々の変形あるいは修正が可能である。例えば、上記実施形態におけるように、用紙搬入路4の傾斜が比較的急に設定されている場合には、用紙の搬送を搬入ローラ対20のニップに依存する必要がなく、駆動ローラ20aに用紙が乗せられたままの状態での搬送が可能である。したがって、用紙の搬入に際し、予め、ソレノイドSOLをONして該ニップを解除しておき、駆動ローラ20aのみにより用紙が搬送される過程で、上記幅合わせ及び斜行補正動作が遂行されるような制御を行なう他の実施形態もある。例えば、図7に示す作動手順において、用紙搬入検知センサS1が用紙束の先端を検知した信号に基づいてソレノイドSOLをONして該ニップを解除し(ステップS−3の直後にこの作動を行なう)、そして電動モータM2の駆動を停止した後にソレノイドSOLをOFFして該ニップを復帰させる(ステップS−15)ような他の作動形態が考えられる。また、ソレノイドSOLをONして該ニップを解除する動作を、搬入ローラ対20が回転駆動される前(ステップS−1の直前)、又は同時(ステップS−1と同時)、又は搬入ローラ対20が回転駆動された直後(ステップS−1の直後)に行なうようにした、更に他の実施形態もある。
【0032】
他方、用紙搬入路4の傾斜が比較的緩やか(おおむね30°以下)に設定された場合には、用紙の搬送を搬入ローラ対20のニップに依存する必要がある。このため、幅合わせ部材22の各々による幅合わせ及び斜行補正動作時には、ソレノイドSOLをONして該ニップを解除する必要がある。したがって、例えば図7に示す作動手順において、ステップS−9において、電動モータM3の正逆駆動&停止を1回行なって幅合わせ及び斜行補正動作を1回行なった後に、ステップS−10の動作の前に、ソレノイドSOLをOFFして該ニップを復帰させることにより搬入ローラ対20による用紙束の搬送を行い、以下、ステップS−10において、用紙束が折り処理位置に到達したと判断するまで、上記動作(ソレノイドSOLのON、電動モータM3の正逆駆動&停止動作を1回遂行、ソレノイドSOLのOFF)を繰り返し行なう制御が考えられる。この制御において、制御手段70が、用紙束が折り処理位置に到達したと判断した場合には、ソレノイドSOLをONして該ニップを解除し、用紙の過剰な搬送を防止する。ソレノイドSOLのOFF動作は、図示の実施形態と同じく、用紙の折り処理が終了し、電動モータM2の駆動が停止されて搬入ローラ対20の駆動ローラ20aの回転が停止してから遂行すればよい。
【0033】
また、用紙搬入路4が、用紙搬入路4に搬入された用紙が用紙搬入路4に沿って自由落下してその先端が受止部材26に受け止められて停止するような急傾斜に設定される、他の実施形態もある。この実施形態においては搬入ローラ対20は使用されない。したがって上記制御手段70は、受止部材26に受け止められた用紙が受止部材26によって移動させられてから所定の折り位置に停止させられるまでの間における用紙の移動動作継続中に用紙の幅合わせ及び斜行補正が行われるように、幅寄せ部材移動手段及び受止部材移動手段を制御することが好ましい。この様な作動によって、用紙の折り処理の時間を従来よりも短縮して高速化することを可能にする。
【0034】
【発明の効果】
本発明による用紙折り装置によれば、用紙の幅合わせ及び斜行補正が所望のとおり十分確実に行なわれることを可能にする。また、用紙の折り処理の時間を従来よりも短縮して高速化することを可能にする。更にはまた、従来よりもコンパクトな構成及び低コストで、上記目的を達成することを可能にする。
【図面の簡単な説明】
【図1】本発明に従って構成された用紙折り装置を含む、複写機に付設されたフィニッシャの構成の一部を破断して概略的に示す正面図。
【図2】図1に示されているフィニッシャに備えられた用紙折り装置の構成を概略的に示す正面図。
【図3】図2の一部を拡大して更に詳細に示す正面図。
【図4】図3の一部を省略して示す平面縮小図。
【図5】図3の一部を省略して示す側面図であって、図3において左方から見た側面縮小図。
【図6】本発明による用紙折り装置に装着される制御手段の要部を示す構成ブロック図。
【図7】図6に示す制御手段の要部の作動手順を示すフローチャート。
【符号の説明】
2 用紙折り装置
4 用紙搬入路
20 搬入ローラ対
20a 駆動ローラ
20b 被駆動ローラ
22 幅合わせ部材
26 受止部材
M1 電動モータ(ブレード用)
M2 電動モータ(折りローラ対、排出ローラ対、搬入ローラ対と共用)
M3 電動モータ(幅合わせ部材用)
M4 電動モータ(受止部材用)
S1 用紙搬入検知センサ
S2 幅合わせ部材HP検知センサ
S3 受止部材HP検知センサ
S4 用紙有無検知センサ
SOL ソレノイド
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet folding apparatus for performing folding processing on a sheet, generally a so-called middle folding process, and particularly to an image forming machine main body in an image forming machine such as an electrostatic copying machine or a laser printer. The present invention relates to a sheet folding apparatus that performs a folding process on an image-formed sheet that has been carried in.
[0002]
[Prior art]
One typical example of a paper folding device, for example, a paper folding device attached to a copying machine main body in an electrostatic copying machine and performing a folding process on an image-formed paper carried from the copying machine main body, A sheet folding means disposed in the direction, a receiving member disposed downstream of the sheet folding means in the paper carry-in path and receiving the leading edge of the carried-in paper, and the receiving member in the paper carry-in path A receiving member moving means for moving along the sheet, a pair of width adjusting members arranged at intervals in the width direction of the paper carry-in path, and width adjustment and skew correction of the paper carried into the paper carry-in path And a width adjusting member moving means for reciprocating the pair of width adjusting members in the width direction. The sheet folding means includes a crank mechanism disposed on the back side of the sheet carry-in path, a sheet folding blade that is an ejection plate drivingly connected to the crank mechanism, and a pair of folding rollers disposed on the front side of the sheet carry-in path. And. The receiving member moving means drives the driving pulley forward and backward, and the driving pulley and the driven pulley arranged at intervals in the sheet moving direction, the endless belt wound around the driving pulley and the driven pulley, and the driving pulley. And an electric motor. The receiving member is attached to the endless belt so as to protrude from the surface of the paper carry-in path, and is reciprocated in the transport direction. The width adjusting member moving means includes a pair of rack members disposed on the back side of the paper carry-in path, a pinion engaged with each rack of the rack member, and an electric motor that drives the pinion to rotate forward and backward. . The pair of rack members are arranged so as to be orthogonal to the horizontal direction with respect to the paper movement direction with an interval in the paper movement direction. The width adjusting member is attached to each of the rack members, and is disposed so as to protrude to the front side of the paper carry-in path. Note that the paper carry-in path is arranged in an almost upright state.
[0003]
In general, it is effective to perform sheet width alignment and skew correction by a pair of width adjusting members over the entire length of the sheet, and it is particularly important to act on the center portion of the center of gravity. However, in a sheet folding device, a relatively large pair of folding rollers is disposed at the center of the sheet folding device. In view of this situation, conventionally, the pair of rack members, the pinion, and the electric motor constituting the receiving member moving means are arranged at positions downstream of the crank mechanism and the blade constituting the paper folding means in the paper carry-in path. Has been. The pair of width adjusting members extend in the upstream direction over the pair of folding rollers disposed on the front side of the paper carry-in path, and each tip portion is configured to be positioned at the upstream side position of the roller pair. ing. The paper is carried into the paper carry-in path by free fall. The leading edge of the paper carried into the paper carry-in path is received by the receiving member and stopped. After the pair of rack members are reciprocated in the width direction by the rack and pinion mechanism to adjust the width of the paper and to correct the skew, the receiving member is rotated by the endless belt so that the paper is moved to a predetermined folding position. Moved until it reaches. After the movement of the paper is stopped, the paper width is adjusted again as described above. The operation of the crank mechanism causes the blade to forcibly move the center of the sheet toward the nip portion of the pair of folding rollers. The forcibly moved sheet is conveyed while being folded by a pair of rollers, and is discharged to a discharge tray.
[0004]
[Problems to be solved by the invention]
In the above-described conventional sheet folding apparatus, the pair of width adjusting members extend in the upstream direction across the pair of folding rollers disposed on the front side of the sheet carry-in path, and each tip end portion of the pair of folding rollers. It is configured to be positioned in the upstream position. That is, the pair of width adjusting members is attached to the rack member at the downstream position of the folding roller pair, but is free at the upstream position of the folding roller pair, and is a so-called cantilever configuration. Yes. As a result, the sheet width alignment and skew correction are practically performed only at the downstream position of the folding roller pair, and the effects of the sheet width alignment and skew correction at the upstream position of the folding roller pair are as follows. In general, it cannot be expected to be performed as reliably as desired. The skew correction of the sheet is mainly performed by the leading end of the sheet contacting the receiving member by its own weight, but the effect is not sufficient. Further, since each of the width adjusting members is enlarged, the paper folding device cannot be made compact. In the sheet folding device, means for solving the technical problem can be considered by increasing the rigidity of each of the width adjusting members and the connecting portion between each of the width adjusting members and the rack member. This will increase the cost. As another means for solving the above technical problem, it is conceivable to arrange width adjusting members on both the upstream side and the downstream side of the pair of folding rollers in the paper carry-in path, but the number of parts greatly increases. In addition, the structure becomes complicated and the control of the width adjusting member becomes complicated, which greatly increases the cost.
[0005]
Further, in the above-described conventional paper folding apparatus, after the paper carried into the paper carry-in path is received by the receiving member, and after the paper is stopped at the predetermined folding position, the paper width adjustment and Since the skew correction is performed, the conveyance, stop, and conveyance of the sheet are repeated, and the time from when the sheet is carried into the sheet carry-in path until the folding process is started is long. As a result, the folding process takes a long time. Therefore, high speed cannot be expected.
[0006]
It is an object of the present invention to provide a novel sheet folding device that enables sheet width alignment and skew correction to be performed sufficiently reliably as desired.
[0007]
Another object of the present invention is to provide a novel paper folding device that can shorten the time for paper folding processing and increase the speed of the paper folding processing.
[0008]
Still another object of the present invention is to provide a novel sheet folding device that makes it possible to achieve the above object with a more compact configuration and lower cost than conventional ones.
[0009]
[Means for Solving the Problems]
The present inventionAspect ofAccording to
A paper folding means disposed with the paper carry-in path sandwiched between the front and back directions, a receiving member that is disposed at a downstream position of the paper folding means in the paper carry-in path, and receives the leading edge of the paper carried in; Receiving member moving means for moving the paper along the paper carry-in path, a pair of width-adjusting members arranged at intervals in the width direction of the paper carry-in path, and the width alignment and skew of the paper carried into the paper carry-in path In a sheet folding apparatus comprising a width adjusting member moving means for reciprocally moving a pair of width adjusting members in the width direction to perform line correction,
The pair of width adjusting members is arranged at a position upstream of the paper folding means in the paper carry-in path.And
A pair of carry-in rollers composed of a drive roller and a driven roller, which is arranged at an upstream position of the paper carry-in path and carries the paper into the paper carry-in path, a drive roller driving means for rotating the drive roller, and a nip of the driven roller Actuator means that can be selectively moved to a position and a nip release position, and control means for controlling the actuator means, drive roller driving means, width adjusting member moving means, and receiving member moving means. Actuator means, drive roller drive means, width so that paper width alignment and skew correction are performed while the paper movement operation continues from when it is carried into the paper carry-in path until it is stopped at the predetermined folding position. Controlling the moving member moving means and the receiving member moving means;
A sheet folding device is provided.
When the paper is carried into the paper carry-in path, the control means operates the driving roller driving means to carry the paper toward the receiving member by the pair of carry-in rollers, and the leading edge of the paper is located immediately upstream of the receiving member. At the same time, the receiving member moving means is operated to move the receiving member in the paper moving direction at the same speed as the paper moving speed, and at the same time, the actuator means is operated to move the driven roller to the nip release position. Preferably, the width adjusting member moving means is operated to reciprocate each of the width adjusting members in the width direction so that the sheet width alignment and skew correction are repeated a plurality of times.
When the paper is carried into the paper carry-in path, the control means operates the actuator means to move the driven roller to the nip release position and operates the driving roller driving means to receive the paper only by the driving roller. When the leading end of the paper reaches the position immediately upstream of the receiving member, the receiving member moving means is operated and the receiving member is moved in the paper moving direction at the same speed as the paper moving speed. It is preferable that the width adjusting member moving means is simultaneously operated to reciprocate each of the width adjusting member members in the width direction so that the sheet width alignment and skew correction are repeated a plurality of times.
Preferably, when the paper is carried into the paper carry-in path, the control means operates the receiving member moving means to move the receiving member slightly downstream from the home position to stand by.
The control means stops the operation of the receiving member moving means to stop the moving receiving member so that the paper is stopped at the folding position, and simultaneously stops the operation of the width adjusting member moving means to stop the width of the paper. It is preferable to stop the alignment and skew feeding correction operation.
According to another aspect of the invention,
A sheet folding means disposed with the sheet carry-in path sandwiched between the front and back directions, a receiving member for receiving the leading edge of the loaded paper disposed at a position downstream of the sheet folding means in the paper carry-in path, and a receiving member Receiving member moving means for moving the paper along the paper carry-in path, a pair of width-adjusting members arranged at intervals in the width direction of the paper carry-in path, and the width alignment and skew of the paper carried into the paper carry-in path In a sheet folding apparatus including a width adjusting member moving unit that reciprocally moves a pair of width adjusting members in the width direction in order to perform line correction,
The pair of width adjusting members are arranged at a position upstream of the paper folding means in the paper carry-in path,
Control means for controlling the width adjusting member moving means and the receiving member moving means is provided, and the paper carry-in path freely falls along the paper carry-in path, and the leading end of the paper carry-in path becomes the receiving member. The steep slope is set so that it stops when it is received, and the control means is received by the receiving member. The width adjusting member moving means and the width adjusting member moving means so that the width adjustment of the paper and the skew feeding correction are performed while the paper movement operation is continued after the paper is moved by the receiving member until it is stopped at the predetermined folding position. Controlling the receiving member moving means;
A sheet folding device is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of a sheet folding apparatus constructed according to the present invention will be described below in detail with reference to the accompanying drawings. Referring to FIG. 1, a finisher 100 attached to a copying machine main body 202 of an electrostatic copying machine 200 which is an image forming machine includes a rectangular parallelepiped housing 102. A paper carry-in port 104 is provided on one side of the housing 102 opposite to one side of the copying machine main body 202. A first paper transport path 106 extending from the paper carry-in port 104 toward the other side of the housing 102 is disposed in the housing 102. In the housing 102, a second paper conveyance path 110 that branches from the first paper conveyance path 106 and extends toward the stapling device 108 is disposed. A branching claw 112 is disposed at a branching portion between the first paper transport path 106 and the second paper transport path 110. The first paper transport path 106 is provided with transport roller pairs 106a and 106b, and the second paper transport path 110 is provided with a transport roller pair 110a. A discharge roller pair 114 is disposed at the downstream end (discharge end) of the first sheet conveyance path 106. A discharge tray 116 is attached to the other side, which is the discharge side of the housing 102. When the post-processing is not performed on the paper (recording paper) on which an image is formed in the copying machine 200, the branching claw 112 is switched from the position shown in FIG. The sheet is conveyed toward the discharge roller pair 114 through the first sheet conveyance path 106 by the conveyance roller pairs 106a and 106b, and is discharged to the discharge tray 116 by the discharge roller pair 114. On the other hand, when the stapling process and / or the folding process are performed on the paper, the branching claw 112 is switched to the position shown in FIG. 1, and the paper carried in from the paper carry-in port 104 is conveyed to the conveying roller pairs 106a, 106b, and 110a. As a result, the paper is conveyed to the staple processing device 108 through the second paper conveyance path 110.
[0012]
In the staple processing device 108, for example, a sheet bundle that has undergone stapling processing (stapling for binding the central portion in the conveyance direction), which is so-called saddle stitching, is output from the staple processing device 108 to the discharge tray 116 by the discharge roller pair 114. There is a case where the paper is discharged and a case where the paper is conveyed to the sheet folding device 2 according to the present invention which is disposed at the lowermost part of the finisher 100 and downstream of the staple processing device 108. The sheet bundle conveyed to the sheet folding device 2 is subjected to a folding process called a so-called middle folding by the sheet folding device 2. On the other hand, when only folding processing is performed on the paper, the paper transported to the stapling device 108 is transported to the paper folding device 2 without being stapled by the stapling device 108.
[0013]
Next, the paper folding device 2 according to the present invention will be described. The sheet folding device 2 is arranged at intervals in the front-rear direction of the housing 102 (front and back directions in FIGS. 1 and 2), and only one of the side plates 3 is shown in FIGS. Between the two). Each of the side plates 3 is formed from a steel plate. Referring to FIG. 2, the sheet folding device 2 is drivably coupled to the sheet carry-in path 4, the crank mechanism 6 disposed on the back side of the sheet carry-in path in the sheet carrying direction of the sheet carry-in path 4, and the crank mechanism 6. And a folding blade 8 that is a protruding plate and a pair of folding rollers 10 disposed on the front side of the paper carry-in path 4. In the embodiment, the surface of the paper carry-in path 4 is disposed so as to have an inclination angle of 30 ° or more close to 30 ° with respect to the horizontal plane. The blade 8 is reciprocated between an operating position close to the nip portion of the folding roller pair 10 and a non-operating position retracted on the back side of the paper carry-in path 4 by the rotation of the crank mechanism 6. The rotating body of the crank mechanism 6 is drivingly connected to an electric motor M1 for operating the folding blade via a power transmission mechanism (not shown). The folding roller pair 10 includes a driving roller 10a and a driven roller 10b that is brought into pressure contact with the driving roller 10a by a spring means (not shown). The drive roller 10a is drivingly connected to the electric motor M2 via a power transmission mechanism (not shown). A discharge path 15, a discharge roller pair 16, and a discharge tray 17 are disposed at a position downstream of the folding roller pair 10. The discharge tray 17 is provided with a pressing member 18 so as to suppress the sheet bundle discharged into the discharge tray 17 from above. The discharge roller pair 16 includes a driving roller 16a and a driven roller 16b, and the driving roller 16a is drivingly connected to the electric motor M2 via a power transmission mechanism (not shown). The crank mechanism 6, the blade 8 and the pair of folding rollers 10 constitute paper folding means disposed with the paper carry-in path 4 sandwiched between the front and back sides, and the paper folding means may use a configuration known per se. Further explanation is omitted.
[0014]
A pair of carry-in rollers 20 for carrying the paper into the paper carry-in path 4 is disposed at a position upstream of the paper folding means in the paper carry-in path 4 and at the most upstream position of the paper carry-in path 4. Yes. The carry-in roller pair 20 includes a driving roller 20a and a driven roller 20b that is rotated by the driving roller 20a. The driving roller 20a is drivingly connected to the electric motor M2 that rotates the driving roller 10a of the pair of folding rollers 10 via a power transmission mechanism (not shown). Therefore, when the electric motor M2 is rotationally driven, the driving roller 10a of the folding roller pair 10, the driving roller 16a of the discharge roller pair 16, and the driving roller 20a of the carry-in roller pair 20 are simultaneously driven to rotate. The electric motor M2 can rotate forward and backward. The electric power transmission mechanism (not shown) that drives and connects the electric motor M2 and the electric motor M2 and the driving roller 20a constitutes a driving roller driving unit that rotationally drives the driving roller 20a of the carry-in roller pair 20. A solenoid SOL (see FIG. 3) is disposed in association with the driven roller 20b. The solenoid SOL, which is an actuator means, can selectively move the driven roller 20b to the nip position and the nip release position.
[0015]
A pair of width adjusting members 22 (in FIGS. 2 to 5) for adjusting the width and skew correction of the paper carried into the paper carry-in path 4 are positioned upstream of the paper folding means in the paper carry-in path 4. (Only one of them is shown). The pair of width adjusting members 22 are arranged at an interval in the width direction of the paper carry-in path 4 and are drivingly connected to the electric motor M3 via a rack and pinion mechanism described later. The electric motor M3 is composed of a stepping motor that can rotate forward and backward.
[0016]
A receiving member 26 that receives the leading edge of the paper carried into the paper carry-in path 4 is disposed at a position downstream of the paper folding means in the paper carry-in path 4. In relation to the receiving member 26, a driving pulley 28 and a driven pulley 30 are arranged at intervals in the sheet moving direction, and an endless belt 32 is wound around the driving pulley 28 and the driven pulley 30. The endless belt 32 is disposed so as to extend in the transport direction at the center in the width direction of the paper carry-in path 4. On both sides of the paper carry-in path 4 with the endless belt 32 sandwiched in the width direction, a paper tray 36 having a flat upper surface is disposed. The upper surface of the paper tray 36 that can be formed from a plate-like member is positioned above the endless belt 32, and the paper is moved along the upper surface. Therefore, the upper surface of the paper receiving tray 36 constitutes a part of the paper carry-in path 4. A guide portion 36 a is formed at the paper inlet portion of the paper receiving tray 36. The guide portion 36a includes a side wall extending upward from both ends in the width direction of the paper tray 36 and an upper wall extending between the upper ends of the side walls in the width direction. The guide portion 36 a is positioned above the movement locus of the receiving member 26 so that the guide portion 36 a does not interfere with the receiving member 26 that moves in the center in the width direction of the paper carry-in path 4. The drive pulley 28 is drivingly connected to the electric motor M4 via a power transmission mechanism (not shown). The electric motor M4 is composed of a stepping motor that can rotate forward and backward.
[0017]
The receiving member 26 is attached to the endless belt 32 so as to protrude from the surface of the paper carry-in path 4 and is reciprocated in the paper moving direction. In the portion of the receiving member 26 that protrudes from the surface of the paper carry-in path 4, a paper receiving wall that extends vertically upward from the surface of the paper carry-in path 4, and extends upstream from the upper end of the paper receiving wall. An overhanging wall and a bottom wall extending in the downstream direction from the lower end of the sheet receiving wall are provided. The paper receiving wall is disposed so as to extend perpendicular to the paper transport direction and in the width direction of the paper carry-in path 4. Between the surface of the paper carrying-in path 4 and the paper receiving wall and the overhanging wall of the receiving member 26, there is a paper receiving portion that has a substantially channel shape when viewed in the width direction of the paper carrying-in path 4. It is formed to extend in the width direction of the paper carry-in path 4. The electric motor M4, the driving pulley 28, the driven pulley 30, the endless belt 32, and the like constitute a receiving member moving unit that moves (reciprocates) the receiving member 26 along the paper carry-in path 4.
[0018]
Referring to FIGS. 3 to 5, the side plate is arranged so that the stationary frame 40 extends in the width direction of the paper carry-in path 4 on the back side of the paper carry-in path 4 and upstream of the paper folding means. It is installed between three. The stationary frame 40 formed of a steel plate includes a flat bottom wall 40a, side walls 40b upright from both ends in the conveying direction of the bottom wall 40a, and flanges extending in opposite directions from the respective upper ends of the side walls 40b. 40c, and the cross section has a substantially channel shape. The upper surface of each of the flanges 40c is positioned substantially on the same plane. A pinion 42 is disposed at the center in the width direction of the bottom wall 40 a of the stationary frame 40. The shaft 42a of the pinion 42 is configured by a drive shaft of the electric motor M3 attached to the back surface side of the bottom wall 40a. A guide shaft 44 is arranged between the side plates 3 so as to extend slightly above the shaft 42a of the pinion 42 in the width direction. A pair of rack members 46 are supported on the guide shaft 44 so as to be movable in the width direction along the guide shaft 44. A rack 46a formed on one side of each rack member 46 is engaged with the pinion 42 from both sides in the sheet conveying direction. Each rack member 46 is formed with a guided flange 46b having a plate shape. The guided flange 46b is fitted and supported by the guide portions of a pair of guide members 48 provided on the bottom wall 40a of the stationary frame 40 so as to be movable in the width direction. The guide portion of the guide member 48 has a channel shape in cross section.
[0019]
The pair of width adjusting members 22 formed of a thin plate member includes a flat bottom wall 22a extending in the conveying direction with a constant width, a side wall 22b standing upright from one end in the width direction of the bottom wall 22a, and a side wall 22b. And a top wall 22c extending in parallel to the bottom wall 22a from the upper end to the other end, and the cross section has a relatively elongated channel shape in the width direction. Each bottom wall 22a of the width adjusting member 22 is integrally formed with a flange 22d extending downward from one end in the width direction. Each of the width adjusting members 22 is configured such that the flange 22d is movably fitted to the guide shaft 44 and cannot move relative to each other in the axial direction in a state where the flange 22d is in contact with the side end of the corresponding rack member 46. They are connected by appropriate locking means or connecting means such as an E-type retaining ring. Each of the width adjusting members 22 can move along the guide shaft 44 together with the corresponding rack member 46. Each width adjusting member 22 is positioned such that the open sides of the channel shape face each other in the width direction, and each bottom wall 22a is positioned on the upper surface of each flange 40c of the stationary frame 40, and the width direction Is relatively movable. The upper surface of the bottom wall 22a of each width adjusting member 22 is positioned substantially on the same plane, and defines a part of the paper carry-in path 4 spaced from each other in the width direction. The upper surface of each bottom wall 22 a of the width adjusting member 22 is also positioned substantially flush with the upper surface of the paper tray 36. When the pinion 42 is driven to rotate forward and backward by the electric motor M3, each of the width adjusting members 22 is reciprocated in the width direction via the corresponding rack member 46. The sheet width alignment and skew correction are performed by the respective side walls 22b of the width alignment member 22. The pinion 42 and the corresponding rack member 46 constitute a rack and pinion mechanism. The electric motor M3 and the rack and pinion mechanism include width adjusting member moving means for reciprocally moving the pair of width adjusting members 22 in the width direction in order to adjust the width and skew correction of the paper carried into the paper carry-in path 4. Constitute.
[0020]
The drive roller 20a of the carry-in roller pair 20 extends on the upstream side of the rack and pinion mechanism in the stationary frame 40 in the width direction and is rotatably supported by each of the side plates 3. Two are attached at intervals in the axial direction so as to be integrally rotated with 20A. The drive shaft 20A is drivingly connected to the electric motor M2 via a power transmission mechanism (not shown). A part of the outer peripheral surface of the driving roller 20 a is positioned so as to protrude upward from the upper surface of the bottom wall 22 a of each width adjusting member 22. A notch 22d is formed in each bottom wall 22a of the width adjusting member 22 so as not to interfere with the driving roller 20a when each width adjusting member 22 reciprocates in the width direction.
[0021]
A support member 50 is rotatably supported by a shaft 52 fixed to each of the side plates 3 at a position above each of the width adjusting members 22. The support member 50 that can be integrally molded from an appropriate synthetic resin has a predetermined thickness and is formed in a substantially rectangular shape when viewed from above, and between the side plates 3 at each upper position of the width adjusting member 22. It arrange | positions so that it may extend in this width direction. The support member 50 is rotatably supported by the shaft 52 on both sides at the downstream end, and the two driven rollers 20b are rotatable at the upstream end with a gap in the width direction. It is supported by. Each of the driven rollers 20b is supported by the tip of a leaf spring 54 attached to the support member 50. The leaf spring 54 extends in the transport direction with a certain width, and its downstream end is attached to the support member 50 and is formed to hang from both ends in the width direction of the upstream end in a free state. A driven roller 20b is rotatably supported between the flanges. A pair of compression coil springs 56 (in FIG. 3, only one of them) is provided between both ends of the upstream end of the support member 50 and the flange 3a formed on the side plate 3 located in the vicinity thereof. Is shown). The shaft 58 is rotatably supported by each of the side plates 3 so that the shaft 58 extends in the width direction between the side plates 3 at a position immediately upstream of the support member 50 and above each of the width adjusting members 22. ing. One end portion of the shaft 58 protrudes outward from the corresponding side plate 3, and a connecting lever 60 is fixed to the protruding portion. The side plate 3 is provided with the solenoid SOL, and the plunger 62 of the solenoid SOL and the connecting lever 60 are pin-coupled. Stop and operation levers 64 are fixed to both ends of the shaft 58 on the inner side of the side plate 3, and the end surfaces of the stop and operation levers 64 can come into contact with the contact surfaces formed on the corresponding lower surface of the support member 50. It is positioned as such.
[0022]
The upstream end of the support member 50 is urged by each of the compression coil springs 56 to rotate clockwise in FIG. 3 about the shaft 52, and each of the abutment surfaces thereof corresponds to the corresponding stop and action. The lever 64 is pressed against the end face to prevent the rotation. Each stop & operation lever 64 is positioned at the illustrated HP (abbreviation of home position) by a stopper (not illustrated) formed between the plunger 62 of the solenoid SOL in the OFF (operation stop) state and the main body of the solenoid SOL. It is done. With such a configuration and action, each of the driven rollers 20 b is pressed against the corresponding driving roller 20 a by the urging force of the leaf spring 54. When the solenoid SOL is turned on (actuated), the plunger 62 is sucked by a predetermined stroke, and the connecting lever 60, the shaft 58, and the stop & actuating lever 64 are rotated clockwise in FIG. The upstream end of the support member 50 is lifted against the spring force of each of the compression coil springs 56, and the support member 50 is rotated about the shaft 52 by a predetermined angle in the counterclockwise direction. As a result, the driven roller 20b is moved from the nip position shown in FIG. 3 to a nip release position (not shown). The gap between the driving roller 20a and the driven roller 20b is defined to be equal to or greater than the maximum thickness of the sheet bundle to be carried. When the solenoid SOL is turned off, the suction of the plunger 62 is released, the support member 50 is rotated clockwise around the shaft 52 by the spring force of each compression coil spring 56, and each of the driven rollers 20b is shown in FIG. The nip position shown in FIG. Each of the compression coil springs 56 has a function of promptly performing the return operation.
[0023]
Referring to FIGS. 2 and 3, a paper carry-in detection sensor S <b> 1 is disposed on the upstream side wall 40 b in the stationary frame 40. The paper carry-in detection sensor S1 is a sensor that detects the carry-in of the paper by detecting the leading edge of the paper carried into the paper carry-in path 4, and is composed of a reflective photosensor. At one end of the bottom wall 40a in the stationary frame 40 in the width direction (the front end in FIGS. 2 and 3 and the right end in FIGS. 4 and 5), each HP of the width adjusting member 22 is detected. A width adjusting member HP detection sensor S2 is disposed. The width adjusting member HP detection sensor S2 is a sensor that detects each HP of the width adjusting member 22 by detecting the end wall of the hanging wall 46c formed on the rack member 46 on one side. It is configured. A receiving member HP detection sensor S3 for detecting the HP of the receiving member 26 is disposed at a position below the upstream end of the paper receiving tray 36 and in the center in the width direction. The receiving member HP detection sensor S3 is a sensor that detects the HP of the receiving member 26 by detecting an edge formed between the paper receiving wall and the bottom wall of the receiving member 26, and is a reflective type. It consists of a photo sensor. The sheet receiving plate 36 is positioned below the position where the receiving member HP detection sensor S3 is disposed, and the sheet carried into the sheet receiving plate 36 is detected at the center in the width direction. A sheet presence / absence detection sensor S4 is provided. The sheet presence / absence detection sensor S4 is a sensor that detects the presence / absence of a sheet by detecting the leading edge of the carried-in sheet, and includes a reflective photosensor.
[0024]
As shown in FIG. 6, the sheet folding apparatus 2 is provided with a control means (controller) 70. The control means 70 is composed of a microcomputer, a central processing unit (CPU) that performs arithmetic processing according to a control program, a ROM that stores a control program, a readable / writable RAM that stores arithmetic results, a timer, a counter, and an input interface And an output interface. The input interface of the control means 70 configured as described above includes the paper carry-in detection sensor S1, the width adjusting member HP detection sensor S2, the receiving member HP detection sensor S3, the paper presence / absence detection sensor S4, and the electric motors M1 to M4. Detection signals from a detector (not shown) that detects the amount of rotation, other detectors, switches, and the like are input, and control signals are output from the output interface to the electric motors M1 to M4, the solenoid SOL, and the like. Further, the control means 70 is connected to a control means (not shown) of the copying machine main body 202 which is an external control means and a control means (not shown) of the stapling apparatus 108, and a predetermined control signal is inputted from these control means. The control means of the copying machine main body 202 includes a copy start key disposed on the operation means, a paper size (conveyance direction length) setting key, and a folding processing setting key for designating paper folding processing (all of which are shown in FIG. The processing information is input from (not shown).
[0025]
The illustrated sheet folding apparatus 2 is configured as described above, and the operation thereof will be described below. In the sheet folding device 2, as described above, there are a case where a folding process is performed on a bundle of sheets subjected to a stapling process, and a case where a folding process is performed on a single sheet. The effects of the present invention are substantially the same. In the following description, a description will be given by taking as an example the carry-in of a sheet bundle that has undergone saddle stitching in the staple processing device 108.
[0026]
2, 6, and 7, the set sheet size information is input to the control unit 70 from the control unit of the copier body 202 that is an external control unit. When the staple processing by the staple processing device 108 is completed, the conveyance roller pair 118 (see FIG. 1) disposed in the staple processing device 108 is driven to convey the saddle stitched sheet bundle to the sheet folding device 2. Be started. A drive start signal for the conveying roller pair 118 is input to the control means 70. When a drive start signal for the conveyance roller pair 118 is input to the control means 70, the control means 70 drives the electric motor M2 to start rotation of the conveyance roller pair 20 (S-1). The folding roller pair 10 and the discharge roller pair 16 are simultaneously rotated simultaneously with the conveying roller pair 20 by driving the electric motor M2. The control means 70 also drives the electric motor M3 in the normal direction to stop based on the size information (S-2). By this operation, each of the width adjusting members 22 is moved by a predetermined amount in a direction approaching each other from the HP, and a predetermined sheet receiving width suitable for the specified size is set. Each HP of the width adjusting member 22 is defined based on a signal from the width adjusting member HP detection sensor S2.
[0027]
When the sheet carry-in detection sensor S1 detects the leading end of the sheet bundle conveyed by the conveyance roller pair 118 (S-3), the control unit 70 drives the electric motor M4 by a predetermined amount to stop (S-4). The endless belt 32 is rotated by a predetermined amount in the counterclockwise direction in FIG. 2 and stopped. By this operation, the receiving member 26 that has been previously positioned at the HP (position indicated by the solid line in FIG. 2) at the upstream end of the sheet receiving tray 36 reaches a predetermined standby position slightly downstream from the HP. Moved to stop. The HP of the receiving member 26 is defined based on a signal from the receiving member HP detection sensor S3. The sheet bundle carried into the sheet carry-in path 4 is conveyed in the downstream direction by the conveying roller pair 20. When the receiving member HP detection sensor S3 detects the leading end of the sheet bundle, the control means 70 determines that the leading end of the sheet bundle has entered the pre-movement HP, which is the position immediately upstream of the receiving member 26. (S-5), the electric motor M4 is driven (S-6). The endless belt 32 is driven to rotate counterclockwise in FIG. 2, and the receiving member 26 is moved together with the endless belt 32 in the downstream direction. It is important that the moving speed of the endless belt 32 and therefore the moving speed of the receiving member 26 are set to substantially the same speed as the moving speed of the sheet bundle, that is, the peripheral speed of the driving roller 20a of the conveying roller pair 20. It is. Since the receiving member 26 is moved together with the sheet bundle at a speed slightly lower than the front end of the sheet bundle, the smooth conveyance of the sheet bundle is guaranteed. If the distance between the leading edge of the sheet bundle and the receiving member 26 is too large, the sheet bundle is formed at the moment when the nip between the driving roller 20a and the driven roller 20b is released when the inclination angle of the sheet carrying-in path 4 is steep. It may slide down and collide with the receiving member 26 and may be greatly inclined. However, as described above, such a problem can be prevented by moving the receiving member 26 at a constant speed at a position slightly away from the front end of the sheet bundle.
[0028]
When the sheet presence / absence detection sensor S4 detects the leading end of the sheet bundle moved as described above and determines that the sheet bundle has entered the sheet width alignment start position (S-7), the control means 70 The SOL is turned on, the driven roller 20b of the conveying roller pair 20 is separated from the driving roller 20a, and the nip is released (S-8). The sheet bundle is released from the nip of the conveying roller pair 20 and is conveyed only by the driving roller 20a. At the same time, the control means 70 drives the electric motor M3 to rotate forward and backward by a predetermined amount to stop it (S-9), and reciprocates the width adjusting members 22 in directions toward and away from each other. By this operation, the width adjustment and skew correction of the moving sheet bundle are performed. Such width alignment and skew feeding correction operation is performed in a state where the sheet bundle is released from the nip of the conveyance roller pair 20 and placed on the driving roller 20a of the conveyance roller pair 20, and the leading edge of the sheet bundle is substantially reduced. Since it is carried out while being supported and moved by the receiving member 26, it is carried out easily and reliably. The width adjustment and skew correction operations are repeatedly performed until the sheet bundle to be moved reaches a predetermined folding processing position (S-9, S-10). Whether or not the sheet bundle has reached a predetermined folding processing position can be determined by detecting the number of rotations of the electric motor M4.
[0029]
When it is determined that the electric motor M4 has rotated by a predetermined number of rotations and the sheet bundle has reached a predetermined folding processing position, the control unit 70 stops driving the electric motor M4 (S-11). The rotation of the endless belt 32 is stopped by stopping the driving of the electric motor M4, and the receiving member 26 and the sheet bundle are stopped at a predetermined folding processing position. At this time, since the ON operation of the solenoid SOL and the rotation drive of the electric motor M2 are continued, the drive roller 20a is rotated in a state where the nip of the carry-in roller pair 20 is released. At the same time when the sheet bundle reaches a predetermined folding processing position, the control means 70 drives the electric motor M1 to operate the crank mechanism 6 to start performing folding processing (intermediate folding processing). Folding processing is performed in a well-known manner, including the operation of rotating M4 in the reverse direction and moving the receiving member 26 in the upstream direction to push the leading end of the sheet bundle (the leading end at the time of entry) in the upstream direction. S-12). It should be noted that the configuration and operation of the folding process itself may use a known form, and will not be described because it does not constitute a feature of the present invention. When the control means 70 determines that the paper folding process has been completed (S-13), it stops driving the electric motor M2 (S-14). The rotation of the folding roller pair 10, the discharge roller pair 16, and the carry-in roller pair 20 is stopped. The determination as to whether or not the sheet folding process has been completed is made, for example, by detecting the passage of the trailing end of the sheet bundle by a sheet discharge detection switch (not shown) disposed immediately downstream of the discharge roller pair 16. be able to. Next, the control means 70 turns off the solenoid SOL to return the nip of the carry-in roller pair 20 and ends the folding process.
[0030]
According to the paper folding device 2 according to the present invention, the pair of width adjusting members 22 are arranged at the upstream side of the paper folding means in the paper carry-in path 4, so that the paper folding means of the conventional device is the same. Without having a cantilever structure that extends over the pair of folding rollers 10, the width adjustment and the width adjustment member 22 that is substantially as long as possible in the conveyance direction is provided in the vicinity of the center in the conveyance direction of the paper. Since skew correction can be performed, it is possible to perform sheet width adjustment and skew correction sufficiently reliably as desired. In addition, the number of parts is minimized, the configuration is simplified, and the cost can be reduced. Furthermore, the sheet width adjustment and skew correction operation can be easily and easily controlled, and the cost can be reduced in this respect as well. In the paper folding apparatus 2, the control means 70 adjusts the width of the paper while the paper movement operation is continued from when the paper is carried into the paper carry-in path 4 until it is stopped at a predetermined folding position. The actuator means including the solenoid SOL, the driving roller driving means including the electric motor M2, the width adjusting member moving means including the electric motor M3, and the receiving member moving means including the electric motor M4 are controlled so that the skew correction is performed. Thus, the sheet width alignment and skew correction can be performed most efficiently, and as a result, the sheet folding process time can be shortened and speeded up compared to the conventional method. Is. Furthermore, it becomes possible to make each structure of the width adjusting member 22 more compact than before, and it is necessary to increase the rigidity of the connecting portion between each width adjusting member 22 and the rack member 46 more than necessary. Therefore, it is possible to achieve the above object with a simpler and more compact configuration and lower cost as a whole.
[0031]
As mentioned above, although this invention was demonstrated in detail, referring an accompanying drawing based on embodiment, this invention is not limited to the said embodiment, Furthermore, various other various, without deviating from the scope of the present invention. Can be modified or modified. For example, as in the above-described embodiment, when the inclination of the paper carry-in path 4 is set relatively steep, it is not necessary to depend on the nip of the carry-in roller pair 20 for carrying the paper, and the paper is fed to the drive roller 20a. It is possible to carry the sheet while it is on. Therefore, when the paper is carried in, the solenoid SOL is turned on in advance to release the nip, and the width adjustment and skew correction operations are performed in the process in which the paper is conveyed only by the driving roller 20a. There are other embodiments for controlling. For example, in the operation procedure shown in FIG. 7, the solenoid SOL is turned on to release the nip based on a signal that the paper carry-in detection sensor S1 detects the leading edge of the paper bundle (this operation is performed immediately after step S-3). Then, after the driving of the electric motor M2 is stopped, another operation mode is conceivable in which the solenoid SOL is turned off to return the nip (step S-15). In addition, the operation of releasing the nip by turning on the solenoid SOL is performed before the carry-in roller pair 20 is rotationally driven (immediately before step S-1) or simultaneously (simultaneously with step S-1), or the carry-in roller pair. There is still another embodiment in which the operation is performed immediately after 20 is rotated (immediately after step S-1).
[0032]
On the other hand, when the inclination of the paper carry-in path 4 is set to be relatively gentle (generally 30 ° or less), it is necessary to depend on the nip of the carry-in roller pair 20 for carrying the paper. For this reason, it is necessary to turn on the solenoid SOL to release the nip during the width alignment and skew correction operation by each of the width alignment members 22. Therefore, for example, in the operation procedure shown in FIG. 7, in step S-9, the forward / reverse driving & stopping of the electric motor M3 is performed once to perform the width adjustment and the skew feeding correction operation once, and then in step S-10. Before the operation, the solenoid SOL is turned off and the nip is returned to carry the sheet bundle by the carry-in roller pair 20, and it is determined in step S-10 that the sheet bundle has reached the folding processing position. Up to this point, it is conceivable to perform the above-described operation (the solenoid SOL is turned on, the electric motor M3 is forward / reversely driven and stopped once, and the solenoid SOL is turned off) repeatedly. In this control, when the control unit 70 determines that the sheet bundle has reached the folding processing position, the solenoid SOL is turned on to release the nip, thereby preventing excessive conveyance of the sheet. Similarly to the illustrated embodiment, the solenoid SOL OFF operation may be performed after the sheet folding process is completed and the driving of the drive roller 20a of the carry-in roller pair 20 is stopped by stopping the driving of the electric motor M2. .
[0033]
Further, the paper carry-in path 4 is set to have a steep inclination so that the paper carried into the paper carry-in path 4 freely falls along the paper carry-in path 4 and the leading end is received by the receiving member 26 and stops. There are other embodiments. In this embodiment, the carry-in roller pair 20 is not used. Therefore, the control means 70 adjusts the width of the paper while the paper movement operation is continued after the paper received by the receiving member 26 is moved by the receiving member 26 until it is stopped at a predetermined folding position. It is preferable to control the width adjusting member moving means and the receiving member moving means so that the skew correction is performed. By such an operation, it is possible to shorten the time for paper folding processing and to increase the speed.
[0034]
【The invention's effect】
The sheet folding device according to the present invention enables the sheet width alignment and skew correction to be performed with sufficient reliability as desired. In addition, it is possible to shorten the time for paper folding processing and to increase the speed. Furthermore, the above object can be achieved with a more compact configuration and lower cost than in the past.
[Brief description of the drawings]
FIG. 1 is a front view schematically showing a part of the structure of a finisher attached to a copying machine including a sheet folding device constructed according to the present invention.
FIG. 2 is a front view schematically showing a configuration of a sheet folding device provided in the finisher shown in FIG. 1;
3 is an enlarged front view showing a part of FIG. 2 in detail. FIG.
FIG. 4 is a plan reduced view in which a part of FIG. 3 is omitted.
5 is a side view showing a part of FIG. 3 with a part thereof omitted, and is a side reduced view as viewed from the left in FIG. 3;
FIG. 6 is a structural block diagram showing the main part of the control means mounted on the paper folding apparatus according to the present invention.
7 is a flowchart showing an operation procedure of a main part of the control means shown in FIG. 6;
[Explanation of symbols]
2 Paper folding device
4 Paper carry-in route
20 Carrying roller pair
20a Drive roller
20b Driven roller
22 Width alignment member
26 Receiving member
M1 electric motor (for blades)
M2 electric motor (shared with folding roller pair, discharge roller pair, and carry-in roller pair)
M3 electric motor (for width adjustment member)
M4 electric motor (for receiving member)
S1 Paper carry-in detection sensor
S2 Width matching member HP detection sensor
S3 Receiving member HP detection sensor
S4 Paper presence / absence detection sensor
SOL solenoid

Claims (6)

用紙搬入路を表裏方向に挟んで配設された用紙折り手段と、用紙搬入路における、用紙折り手段の下流側位置に配置されて搬入された用紙の先端を受け止める受止部材と、受止部材を用紙搬入路に沿って移動させる受止部材移動手段と、用紙搬入路の幅方向に間隔をおいて配置された一対の幅寄せ部材と、用紙搬入路に搬入された用紙の幅合わせ及び斜行補正を行なうために一対の幅合わせ部材を該幅方向に往復移動させる幅合わせ部材移動手段とを備えている用紙折り装置において、
一対の幅合わせ部材は、用紙搬入路における、用紙折り手段の上流側位置に配置され、
用紙搬入路の上流位置に配置されて用紙搬入路に用紙を搬入させる、駆動ローラと被駆動ローラとからなる搬入ローラ対と、駆動ローラを回転駆動させる駆動ローラ駆動手段と、被駆動ローラをニップ位置とニップ解除位置に選択的に移動させうるアクチュエータ手段と、アクチュエータ手段、駆動ローラ駆動手段、幅合わせ部材移動手段及び受止部材移動手段を制御する制御手段とを備え、制御手段は、用紙が用紙搬入路に搬入されてから所定の折り位置に停止させられるまでの間における用紙の移動動作継続中に用紙の幅合わせ及び斜行補正が行われるように、アクチュエータ手段、駆動ローラ駆動手段、幅寄せ部材移動手段及び受止部材移動手段を制御する、
ことを特徴とする用紙折り装置。
A sheet folding means disposed with the sheet carry-in path sandwiched between the front and back directions, a receiving member for receiving the leading edge of the loaded paper disposed at a position downstream of the sheet folding means in the paper carry-in path, and a receiving member Receiving member moving means for moving the paper along the paper carry-in path, a pair of width-adjusting members arranged at intervals in the width direction of the paper carry-in path, and the width alignment and skew of the paper carried into the paper carry-in path In a sheet folding apparatus including a width adjusting member moving unit that reciprocally moves a pair of width adjusting members in the width direction in order to perform line correction,
The pair of width adjusting members are arranged at a position upstream of the paper folding means in the paper carry-in path,
A pair of carry-in rollers composed of a drive roller and a driven roller, which is arranged at an upstream position of the paper carry-in path and carries the paper into the paper carry-in path, a drive roller driving means for rotating the drive roller, and a nip of the driven roller Actuator means that can be selectively moved to a position and a nip release position, and control means for controlling the actuator means, drive roller driving means, width adjusting member moving means, and receiving member moving means. Actuator means, drive roller drive means, width so that paper width alignment and skew correction are performed while the paper movement operation continues from when it is carried into the paper carry-in path until it is stopped at the predetermined folding position. Control the moving member moving means and the receiving member moving means;
A paper folding device characterized by the above .
制御手段は、用紙の、用紙搬入路への搬入に際しては、駆動ローラ駆動手段を作動させて搬入ローラ対により用紙を受止部材に向けて搬入させ、用紙の先端が受止部材の直上流位置に達すると同時に受止部材移動手段を作動させて受止部材を用紙の移動速度と同じ速度で用紙の移動方向に移動させると同時に、アクチュエータ手段を作動させて被駆動ローラをニップ解除位置に移動させかつ幅合わせ部材移動手段を作動して幅合わせ部材部材の各々を該幅方向に往復作動させて用紙の幅合わせ及び斜行補正を行なう動作を複数回繰り返し行わせる、請求項記載の用紙折り装置。When the paper is carried into the paper carry-in path, the control means operates the driving roller driving means to carry the paper toward the receiving member by the pair of carry-in rollers, and the leading edge of the paper is located immediately upstream of the receiving member. At the same time, the receiving member moving means is operated to move the receiving member in the paper moving direction at the same speed as the paper moving speed, and at the same time, the actuator means is operated to move the driven roller to the nip release position. 2. A sheet according to claim 1 , wherein the sheet width adjusting member moving means is operated to reciprocate each of the width adjusting member members in the width direction so that the sheet width alignment and skew correction are repeated a plurality of times. Folding device. 制御手段は、用紙の、用紙搬入路への搬入に際しては、アクチュエータ手段を作動させて被駆動ローラをニップ解除位置に移動させると共に駆動ローラ駆動手段を作動させて駆動ローラのみにより用紙を受止部材に向けて搬入させ、用紙の先端が受止部材の直上流位置に達すると同時に受止部材移動手段を作動させて受止部材を用紙の移動速度と同じ速度で用紙の移動方向に移動させると同時に幅合わせ部材移動手段を作動して幅合わせ部材部材の各々を該幅方向に往復作動させて用紙の幅合わせ及び斜行補正を行なう動作を複数回繰り返し行わせる、請求項記載の用紙折り装置。When the paper is carried into the paper carry-in path, the control means operates the actuator means to move the driven roller to the nip release position and operates the driving roller driving means to receive the paper only by the driving roller. When the leading end of the paper reaches the position immediately upstream of the receiving member, the receiving member moving means is operated and the receiving member is moved in the paper moving direction at the same speed as the paper moving speed. by reciprocating each of the side end aligning member member in the width direction causes repeated a plurality of times an operation to perform width alignment and skew correction of the sheet by operating the width aligning member moving means simultaneously, folding sheet according to claim 1, wherein apparatus. 制御手段は、用紙の、用紙搬入路への搬入に際しては、受止部材移動手段を作動させて受止部材をホームポジションから僅かに下流方向に移動させて待機させる、請求項又は請求項記載の用紙折り装置。Control means, the sheet, when carried to the sheet conveying path, actuates the receiving member moving means to stand by moving the receiving member from the home position slightly downstream, claim 2 or claim 3 The paper folding apparatus described. 制御手段は、用紙が折り位置に停止されるように受止部材移動手段の作動を停止して移動中の受止部材を停止させ、同時に幅合わせ部材移動手段の作動を停止して用紙の幅合わせ及び斜行補正動作を停止させる、請求項2〜4のいずれか1項に記載の用紙折り装置。The control means stops the operation of the receiving member moving means to stop the moving receiving member so that the paper is stopped at the folding position, and simultaneously stops the operation of the width adjusting member moving means to stop the width of the paper. The sheet folding device according to any one of claims 2 to 4 , wherein the alignment and skew correction operation is stopped. 用紙搬入路を表裏方向に挟んで配設された用紙折り手段と、用紙搬入路における、用紙折り手段の下流側位置に配置されて搬入された用紙の先端を受け止める受止部材と、受止部材を用紙搬入路に沿って移動させる受止部材移動手段と、用紙搬入路の幅方向に間隔をおいて配置された一対の幅寄せ部材と、用紙搬入路に搬入された用紙の幅合わせ及び斜行補正を行なうために一対の幅合わせ部材を該幅方向に往復移動させる幅合わせ部材移動手段とを備えている用紙折り装置において、
一対の幅合わせ部材は、用紙搬入路における、用紙折り手段の上流側位置に配置され、
幅合わせ部材移動手段及び受止部材移動手段を制御する制御手段を備え、用紙搬入路は、用紙搬入路に搬入された用紙が用紙搬入路に沿って自由落下してその先端が受止部材に受け止められて停止するような急傾斜に設定され、制御手段は、受止部材に受け止められた用紙が受止部材によって移動させられてから所定の折り位置に停止させられるまでの間における用紙の移動動作継続中に用紙の幅合わせ及び斜行補正が行われるように、幅寄せ部材移動手段及び受止部材移動手段を制御する、
ことを特徴とする用紙折り装置。
A sheet folding means disposed with the sheet carry-in path sandwiched between the front and back directions, a receiving member for receiving the leading edge of the loaded paper disposed at a position downstream of the sheet folding means in the paper carry-in path, and a receiving member Receiving member moving means for moving the paper along the paper carry-in path, a pair of width-adjusting members arranged at intervals in the width direction of the paper carry-in path, and the width alignment and skew of the paper carried into the paper carry-in path In a sheet folding apparatus including a width adjusting member moving unit that reciprocally moves a pair of width adjusting members in the width direction in order to perform line correction,
The pair of width adjusting members are arranged at a position upstream of the paper folding means in the paper carry-in path,
Control means for controlling the width adjusting member moving means and the receiving member moving means is provided, and the paper carry-in path freely falls along the paper carry-in path, and the leading end of the paper carry-in path becomes the receiving member. The steep slope is set so that the paper is received and stopped, and the control means moves the paper between the time when the paper received by the receiving member is moved by the receiving member and the time when the paper is stopped at a predetermined folding position. Controlling the width adjusting member moving means and the receiving member moving means so that the width adjustment of the paper and the skew feeding correction are performed while the operation is continued.
A paper folding device characterized by the above .
JP2000365475A 2000-11-30 2000-11-30 Paper folding device Expired - Fee Related JP3660868B2 (en)

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US7416177B2 (en) * 2004-09-16 2008-08-26 Ricoh Company, Ltd. Sheet folding apparatus, sheet processing apparatus and image forming apparatus
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