JP3931966B2

JP3931966B2 - Recording device

Info

Publication number: JP3931966B2
Application number: JP2002024098A
Authority: JP
Inventors: 一夫斉藤
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2002-01-31
Filing date: 2002-01-31
Publication date: 2007-06-20
Anticipated expiration: 2022-01-31
Also published as: JP2003226053A

Description

【０００１】
【発明の属する技術分野】
本願発明は、記録紙の両面に記録実行可能な構成を有する記録装置に関する。
【０００２】
【従来の技術】
従記録紙の表面に記録実行後、記録装置内で記録紙の面を反転させて、記録紙の裏面に記録を実行して記録紙の両面に記録を実行することが可能な構成を有する従来の記録装置の一例としては、記録紙の記録面を反転させるための専用の反転ローラを備えたものが公知である。これは、記録実行後の記録紙を記録実行時の搬送経路を介して記録実行時の搬送方向と逆方向に搬送し、その記録紙を専用の反転ローラにて反転させながら再び搬送経路に戻すことによって、記録面を反転させるものである。
【０００３】
しかし、専用の反転ローラを設けることによって、その分記録装置のコストが上昇してしまうとともに、専用の反転ローラを配設するスペースの分だけ記録装置が大型になってしまうという問題が生じてしまう。そこで、このような問題を解決した従来技術としては、専用の反転ローラを設けずに、記録装置内で記録紙の面を反転させて、記録紙の裏面に記録を実行して記録紙の両面に記録を実行することが可能な構成を有する記録装置が公知であり、その一例として、特開２００１−２９０３１３号公報や特開平５−２９７６６２号公報等が挙げられる。
【０００４】
【発明が解決しようとする課題】
しかしながら、前述した従来技術に開示されている記録装置は、記録紙の面を反転させた後、直接記録実行領域に記録紙を給紙するため、給紙トレイや給紙カセット等から記録紙を給紙する給紙制御手順と、記録実行後の記録紙を反転させた後に記録実行領域に給紙する給紙制御手順とが異なることになる。したがって、記録紙の両面に記録を実行する際の給紙制御手順が複雑になってしまうという問題が生じることになる。
【０００５】
本願発明は、このような状況に鑑み成されたものであり、その課題は、専用の反転ローラを設けずに、記録装置内で記録紙の面を反転させて、記録紙の裏面に記録を実行して記録紙の両面に記録を実行することが可能な構成を有する記録装置において、記録紙の両面に記録を実行する際の給紙制御手順を簡略にすることにある。
【０００６】
【課題を解決するための手段】
上記課題を達成するため、本発明の第 1 の態様に記載の発明は、記録紙を給紙経路へ給紙する給紙手段と、前記給紙経路へ給紙された前記記録紙を、所定の搬送量で搬送する記録紙搬送手段と、該記録紙搬送手段によって搬送経路を搬送される前記記録紙の記録面に記録を実行する記録実行手段と、該記録実行手段によって記録実行済みの前記記録紙を排出経路へ排出する記録紙排出手段と、前記記録実行手段によって表面に記録実行済みの前記記録紙を、該記録紙の終端側から前記搬送方向と逆方向に、前記搬送経路とは異なる逆送経路を介して、前記給紙手段に向けて搬送し、前記給紙手段によって、該記録紙の終端側から前記給紙経路へ該記録紙の裏面を前記記録面として給紙する記録面反転給紙手段とを備えた記録装置である。
【０００７】
記録実行手段によって表面に記録実行後の記録紙を、その記録紙の終端側から搬送方向と逆方向に、搬送経路とは異なる逆送経路を介して、給紙手段に向けて搬送するので、記録実行領域に給紙する際に記録紙の終端の裏面側から給紙することになり、それによって、専用の反転ローラを設けることなく記録紙の面を反転させることができる。
【０００８】
また、面を反転させた記録紙を記録実行領域に給紙する際に、給紙トレイや給紙カセット等から記録紙を給紙する給紙手段によって記録紙を給紙するので、記録紙の両面に記録を実行する際に、記録紙の表面に記録を実行する際の給紙制御手順と記録紙の裏面に記録を実行する際の給紙制御手順とを共通の制御手順とすることができる。
【０００９】
これにより、本発明の第 1 の態様に記載の発明によれば、記録実行領域に給紙する際に記録紙の終端の裏面側から給紙することになり、それによって、専用の反転ローラを設けることなく記録紙の面を反転させることができるので、記録装置の小型化とコスト低減を図ることができる。また、記録紙の両面に記録を実行する際に、記録紙の表面に記録を実行する際の給紙制御手順と記録紙の裏面に記録を実行する際の給紙制御手順とを共通の制御手順とすることができるので、記録紙の両面に記録を実行する際の給紙制御手順を簡略にすることができるという作用効果が得られる。
【００１０】
本発明の第２の態様に記載の発明は、前述した第１の態様において、前記記録面反転給紙手段は、前記逆送経路に、前記記録紙の記録実行済みの記録面と反対側の面に接して駆動回転する逆送駆動ローラと、前記逆送経路を介して搬送された前記記録紙の記録実行済みの記録面に接して従動回転する逆送従動ローラとを備え、前記逆送駆動ローラと前記逆送従動ローラとで前記逆送経路を介して搬送される前記記録紙を挟持し、前記逆送駆動ローラの駆動回転によって、前記逆送経路を介して前記記録紙を前記給紙手段へ向けて搬送する構成を成している、ことを特徴とした記録装置である。
【００１１】
このように、逆送経路内に記録紙を挟持して搬送する逆送駆動ローラと逆送従動ローラとが配設されており、駆動回転する逆送駆動ローラが記録紙の記録実行済みの記録面と反対側の面に接するので、逆送駆動ローラと記録紙との間にスリップが生じても記録済みの記録面にスリップ痕がついてしまう虞をなくすことができる。
【００１２】
これにより、本発明の第２の態様に記載の発明によれば、本発明の第 1 の態様に記載の発明による作用効果に加えて、逆送駆動ローラと記録紙との間にスリップが生じても記録済みの記録面にスリップ痕がついてしまう虞をなくすことができるので、表面に記録実行後の記録紙が逆送経路内を搬送される際に、記録済みの記録面の画質が劣化してしまう虞を少なくすることができるという作用効果が得られる。
【００１３】
本発明の第３の態様に記載の発明は、前述した第 1 の態様又は第２の態様において、前記記録紙の記録面に記録実行中は、前記搬送方向に駆動回転し、前記記録紙を該記録紙の終端側から前記逆送経路を介して前記給紙手段に向けて搬送する際には、前記搬送方向と逆方向に駆動回転して前記記録紙を前記逆送経路へ向けて搬送する双方向搬送駆動ローラと、該双方向搬送駆動ローラに付勢された状態で従動回転可能な双方向搬送従動ローラと、該双方向搬送従動ローラを前記双方向搬送駆動ローラからレリースさせる双方向搬送従動ローラレリース手段とを有する構成を成している、ことを特徴とした記録装置である。
【００１４】
記録紙の記録面に記録を実行する際には、記録紙の搬送方向に駆動回転する双方向搬送駆動ローラと、その双方向搬送駆動ローラに付勢されている双方向搬送従動ローラとで記録紙を挟持し、双方向搬送駆動ローラの駆動回転によって記録紙を排出経路へ搬送する。また、表面に記録済みの記録紙を逆送経路に向けて搬送する際には、記録紙への記録実行後、記録紙の終端近傍が双方向搬送駆動ローラと双方向搬送従動ローラとの挟持部分に到達した時点で、双方向搬送駆動ローラを逆回転させることで、表面に記録済みの記録紙を終端側から逆送経路へ搬送することができる。
【００１５】
そして、その記録紙の終端が逆送経路を介して給紙手段に到達し、給紙手段によって記録実行領域に向けて給紙され、記録紙の終端側から裏面への記録が行われる。その際、双方向搬送駆動ローラは、記録紙の裏面への記録が開始されると、記録紙を搬送方向に駆動回転制御される。しかし、その時点で、記録紙の始端側が双方向搬送駆動ローラと双方向搬送従動ローラとの間に挟持されたままの状態であると、双方向搬送駆動ローラが搬送方向に回転することによって、記録紙の始端側を記録紙の搬送方向と逆方向に引っ張ってしまうことになり、記録紙を終端側から搬送方向に搬送して裏面に記録実行中の記録紙にバックテンションが作用してしまうことになる。
【００１６】
そこで、記録紙の終端側から給紙手段によって記録紙が給紙され、記録紙の裏面に記録を開始する時点から、記録紙の始端が記録紙排出手段を抜けるまでは、双方向搬送従動ローラを双方向搬送従動ローラレリース手段によってレリース（離間）させる。それによって、裏面に記録実行中の記録紙の始端側は、フリーな状態となるので、記録紙にバックテンションが作用することを防止することができる。
【００１７】
これにより、本発明の第３の態様に記載の発明によれば、前述した第 1 の態様又は第２の態様に記載の発明による作用効果に加えて、双方向に駆動回転可能な双方向搬送駆動ローラを有する記録紙排出手段によって、逆送経路を介して記録紙を給紙手段へ搬送し、記録紙の裏面に終端側から記録を実行する際に、記録紙の始端側にバックテンションが作用することを防止することができるので、それによって、記録画質が低下してしまう虞を防止することができる。
【００１８】
本発明の第４の態様に記載の発明は、前述した第１〜第３の態様のいずれかにおいて、前記記録面反転給紙手段は、前記双方向搬送駆動ローラを前記搬送方向と逆方向に駆動回転させて前記記録紙を前記逆送経路へ向けて搬送する際に、前記記録紙の終端を前記逆送経路へ誘導する記録紙終端誘導手段を備えている、ことを特徴とした記録装置である。
【００１９】
本発明の第４の態様に記載の発明によれば、前述した第１〜第３の態様のいずれかに記載の発明による作用効果に加えて、表面に記録済みの記録紙を終端側から逆送経路へ搬送する際に、その記録紙の終端を逆送経路へ誘導する記録紙終端誘導手段を備えているので、表面に記録実行後の記録紙の終端を確実に逆送経路の入口へ誘導することができるという作用効果が得られる。
【００２０】
本発明の第５の態様に記載の発明は、前述した第４の態様において、前記記録紙終端誘導手段は、従動回転可能に軸支され、前記記録紙の終端近傍を前記逆送経路の入口へ押動する如く移動可能に配設されている記録紙終端誘導ローラを有する構成を成している、ことを特徴とした記録装置である。
【００２１】
本発明の第５の態様に記載の発明によれば、前述した第４の態様に記載の発明による作用効果に加えて、従動回転可能に軸支された記録紙終端誘導ローラで、表面に記録実行後の記録紙の終端近傍を逆送経路の入口へ押動して誘導するので、記録済みの記録面側の終端を押動して逆送経路へ誘導した際に、記録紙終端誘導ローラが記録紙の移動にともなって従動回転するので、記録済みの記録面に負荷が作用せず、記録面を傷つけてしまう虞を少なくすることができるという作用効果が得られる。
【００２２】
本発明の第６の態様に記載の発明は、前述した第１〜第５の態様のいずれかにおいて、前記逆送経路には、前記記録紙を検出可能な紙検出器が配設されている、ことを特徴とした記録装置である。
【００２３】
本発明の第６の態様に記載の発明によれば、前述した第１〜第５の態様のいずれかに記載の発明による作用効果に加えて、逆送経路に記録紙を検出可能な紙検出器が配設されているので、逆送経路内において記録紙の終端位置を検出することができ、その後に給紙手段によって給紙される記録紙が、表面に記録実行済みで、その裏面が記録面となっている記録紙であることを識別することが可能になるという作用効果が得られる。
【００２４】
本発明の第７の態様に記載の発明は、前述した第１〜第６の態様のいずれかにおいて、前記排出手段の排出方向下流側に、前記排出経路とは異なる待避経路を備え、表面に記録実行済みの前記記録紙の裏面に記録を実行する際には、該記録紙の始端を前記待避経路へ誘導する記録紙始端誘導手段を備えている、ことを特徴とした記録装置である。
【００２５】
記録紙の両面に記録を実行する際に、表面への記録実行後、その記録紙を排出経路へ途中まで排出した後に逆送経路を介して逆送すると、記録紙の排出口に一時的に記録紙が飛び出した後、再び排出口に入っていくことになる。したがって、その際に、排出口に飛び出した記録紙をユーザーが誤って引っ張ってしまう虞がある。
【００２６】
そこで、記録紙の両面に記録を実行する際には、表面への記録実行後、記録紙の始端側を待避経路へ誘導し、排出経路へ記録紙を排出せずに待避経路へ記録紙を一時的に待避させることによって、表面に記録実行後の記録紙を排出経路に記録紙を排出することなく記録紙の終端側から逆送経路へ送ることができる。
【００２７】
これにより、本発明の第７の態様に記載の発明によれば、前述した第１〜第６の態様のいずれかに記載の発明による作用効果に加えて、表面に記録実行後の記録紙を排出経路に記録紙を排出することなく記録紙の終端側から逆送経路へ送ることができるので、表面に記録実行後の記録紙を、ユーザーが誤って引っ張り出してしまう虞をなくすことができるという作用効果が得られる。
【００２８】
本発明の第８の態様に記載の発明は、前述した第７の態様において、前記排出経路は、前記記録紙の記録面を内側に湾曲させながら前記記録紙を反転させて排出する湾曲経路を備える、ことを特徴とした記録装置である。
【００２９】
波打ち変形した記録紙を記録面が内側になる如く湾曲させることによって、湾曲方向と直交する方向の矯正力を記録紙に対して作用させることができる。つまり、主走査方向に波打ち変形した記録紙を副走査方向に記録面が内側になる如く湾曲させることによって、湾曲方向と直交する方向の矯正力が記録紙に対して作用するので、主走査方向の矯正力が記録紙に作用することになる。したがって、記録面を内側に湾曲させながら記録実行後の記録紙を反転させる湾曲経路によって、コックリング現象によって生じた記録紙の主走査方向の波打ち変形を矯正することができる。
【００３０】
これにより、本発明の第８の態様に記載の発明によれば、前述した第７の態様に記載の発明による作用効果に加えて、記録面を内側に湾曲させながら記録実行後の記録紙を反転させる湾曲経路によって、コックリング現象によって生じた記録紙の主走査方向の波打ち変形を矯正することができるので、コックリング現象による記録実行後の記録紙の波打ち変形を矯正することができるという作用効果が得られる。
【００３１】
また、記録紙を湾曲させて反転させることによって、前面から給紙した記録紙が記録実行後、再び前面に排出されるインクジェット式記録装置を構成することができるという作用効果も得られる。
【００３２】
本発明の第９の態様に記載の発明は、前述した第８の態様において、前記記録紙始端誘導手段は、前記湾曲経路の一部が揺動して前記排出経路から待避することによって、記録実行後の前記記録紙が前記待避経路へ誘導される構成を成している、ことを特徴とした記録装置である。
【００３３】
このように、記録紙始端誘導手段は、湾曲経路の一部が揺動して排出経路から待避することによって、記録実行後の記録紙が待避経路へ誘導される構成を成している、つまり、湾曲経路の一部が記録紙始端誘導手段を兼ねているので、記録紙始端誘導手段を別途配設する必要が無い。
【００３４】
これにより、本発明の第９の態様に記載の発明によれば、前述した第８の態様に記載の発明による作用効果に加えて、湾曲経路の一部が記録紙始端誘導手段を兼ねているので、効率的に記録紙始端誘導手段を構成することができるという作用効果が得られる。
【００３５】
【発明の実施の形態】
以下、本願発明の一実施の形態を図面に基づいて説明する。
まず、本願発明に係る「記録装置」としてのインクジェット式記録装置の概略構成について説明する。
図１は、本願発明に係る「記録装置」としてのインクジェット式記録装置の一実施の形態を示した斜視図であり、図２は、要部側面図である。
【００３６】
インクジェット式記録装置５０には、記録紙Ｐの記録面上を主走査方向Ｘに往復動しながら記録面にインクを吐出して記録を実行する「記録実行手段」手段として、キャリッジガイド軸６１及びサブキャリッジガイド軸６１Ｓに軸支され、主走査方向Ｘに移動するキャリッジ６２が配設されている。キャリッジ６２には、記録紙Ｐにインクを吐出する記録ヘッド６３が搭載されている。記録ヘッド６３と対向して、記録ヘッド６３のヘッド面と記録紙Ｐとの間隔を規定するプラテン５３が設けられている。そして、キャリッジ６２を主走査方向Ｘに往復動させながら記録ヘッド６３のヘッド面から記録紙Ｐにインクを吐出する動作と、記録紙Ｐを副走査方向Ｙに所定の搬送量で搬送する動作とを交互に繰り返すことで記録紙Ｐに記録が行われる。
【００３７】
また、インクジェット式記録装置５０は、多数の記録紙Ｐを積重可能な給紙カセット７０が装着可能な構成を成しており、給紙カセット７０を装着した状態で、給紙カセット７０に配設されているゲートローラ７３、リバースローラ７４、ホッパー７５及び高摩擦部材７６と、インクジェット式記録装置５０に配設されている給紙ローラ７１及びピックアップローラ７２とで、記録紙Ｐの「給紙手段」としての給紙装置を構成している。
【００３８】
さらに、インクジェット式記録装置５０には、給紙された記録紙Ｐを副走査方向Ｙに間欠的に搬送する「記録紙搬送手段」として、搬送駆動ローラ５１と搬送従動ローラ５２とが配設されている。搬送駆動ローラ５１は、回転駆動力源により回転制御され、搬送駆動ローラ５１の回転により、記録紙Ｐは副走査方向Ｙに搬送される。搬送従動ローラ５２は複数設けられており、それぞれ個々に搬送駆動ローラ５１に付勢され、記録紙Ｐが搬送駆動ローラ５１の回転により搬送される際に、記録紙Ｐに接して記録紙Ｐの搬送に従動して回転する。
【００３９】
搬送駆動ローラ５１の副走査方向Ｙの上流側には、紙検出器５６が配設されている。紙検出器５６は、立位姿勢への自己復帰習性が付与され、かつ記録紙搬送方向にのみ回動し得るよう記録紙Ｐの搬送経路内に突出する状態で枢支されたレバー部５６ａを有し、このレバー部５６ａの先端が記録紙Ｐに押されることでレバー部５６ａが回動し、それによって記録紙Ｐが検出される構成を成している。
【００４０】
さらに、インクジェット式記録装置５０には、記録実行後の記録紙Ｐを排出する「記録紙排出手段」として、排紙駆動ローラ５４と排紙従動ローラ５５が配設されている。排紙駆動ローラ５４は、回転駆動力源により回転制御され、排紙駆動ローラ５４の回転により、記録実行後の記録紙Ｐは副走査方向Ｙに排出される。排紙従動ローラ５５は、周囲に複数の歯を有し、各歯の先端が記録紙Ｐの記録面に点接触するように鋭角的に尖っている歯付きローラとなっている。排紙従動ローラ５５は、それぞれ個々に排紙駆動ローラ５４に、前述の搬送従動ローラ５２の付勢力よりも弱い付勢力で付勢され、記録紙Ｐが排紙駆動ローラ５４の回転により排出される際に、記録紙Ｐに接して記録紙Ｐの排出に従動して回転する。そして、記録実行後の記録紙Ｐは、排紙駆動ローラ５４及び排紙従動ローラ５５により副走査方向Ｙの下流側に排出される。
【００４１】
排紙駆動ローラ５４及び排紙従動ローラ５５の下流側には、「排出経路」として、記録済みの記録面を内側に湾曲させながら記録紙Ｐを反転させて排紙トレイ（図示せず）へ排出する湾曲経路３が構成されている。湾曲経路３は、図示の如く、記録面を内側に湾曲させながら、記録実行後の記録紙Ｐの面を反転させて排出方向Ｅへ排出する。湾曲経路３には、複数の排紙駆動ローラ３１及び排紙従動ローラ３２が配設されている。
【００４２】
排紙駆動ローラ３１ａ〜３１ｄは、前述の排紙駆動ローラ５４と同様に、回転駆動力源により回転制御され、排紙駆動ローラ３１ａ〜３１ｄの回転により湾曲経路の記録紙Ｐが排出方向Ｅへ排出される。また、排紙従動ローラ３２ａ〜３２ｄは、排紙従動ローラ５５と同様に、周囲に複数の歯を有し、各歯の先端が記録紙Ｐの記録面に点接触するように鋭角的に尖っている歯付きローラとなっている。それぞれ個々に排紙駆動ローラ３１ａ〜３１ｄに、前述の搬送従動ローラ５２の付勢力よりも弱い付勢力で付勢され、記録紙Ｐが排紙駆動ローラ３１ａ〜３１ｄの回転により排出方向Ｅへ排出される際に、記録紙Ｐに接して記録紙Ｐの排出に従動して回転する。
【００４３】
さらに、インクジェット式記録装置５０は、本願発明に係る「記録面反転給紙手段」として、記録紙Ｐの両面に記録を実行する際に、記録実行手段によって表面に記録実行後の記録紙Ｐを、記録紙Ｐの終端側から搬送方向と逆方向に、記録実行時の搬送経路とは異なる逆送経路１を介して、給紙手段に向けて搬送し、給紙手段によって、記録紙Ｐの終端側から給紙経路へ記録紙Ｐの裏面を記録面として給紙する手段を備えている。
【００４４】
記録面反転給紙手段は、表面に記録実行後の記録紙Ｐを一時的に待避させる「待避経路」としての待避トレイ２を備えている。このように、表面に記録実行後の記録紙Ｐを排出経路１に排出することなく記録紙Ｐの終端側から逆送経路１へ送ることができるので、表面に記録実行後の記録紙Ｐをユーザーが誤って引っ張り出してしまう虞をなくすことができる。
【００４５】
また、記録面反転給紙手段は、記録紙搬送方向に記録紙Ｐを搬送しつつ記録実行後の記録紙Ｐの始端を待避方向Ｓへ誘導して待避トレイ２へ待避させる「記録紙始端誘導手段」を備えている。記録紙始端誘導手段は、湾曲経路３の揺動部３３が図示の如く揺動して、排出経路Ｅから一点鎖線で示した揺動部３３ａの位置へ待避することによって、表面に記録実行後の記録紙Ｐが待避経路２へ誘導される構成を成している。このように、湾曲経路３の一部が揺動して排出経路Ｅから待避することによって、記録実行後の記録紙Ｐが待避経路Ｓへ誘導される構成を成している、つまり、湾曲経路３の一部が記録紙始端誘導手段を兼ねているので、記録紙始端誘導手段を別途配設する必要が無い。
【００４６】
さらに、記録面反転給紙手段は、待避トレイ２に待避させた記録実行後の記録紙Ｐを、その終端を逆送経路１へ誘導し（記録紙終端誘導手段）、その終端側から逆送経路１へ搬送する双方向搬送駆動ローラ４１及び双方向搬送従動ローラ４２、並びに双方向搬送従動ローラ４２を双方向搬送駆動ローラ４１からレリースさせる「双方向搬送従動ローラレリース手段」を備えている。双方向搬送従動ローラ４２は、排紙従動ローラ５５と同様に、周囲に複数の歯を有し、各歯の先端が記録紙Ｐの記録面に点接触するように鋭角的に尖っている歯付きローラとなっている。
【００４７】
さらに、記録面反転給紙手段は、逆送経路１の入口側に、逆送経路１へ搬送された記録実行後の記録紙Ｐの記録面と反対側の面に接して駆動回転する逆送駆動ローラ１１と、その記録面に接して従動回転する逆送従動ローラ１２とを備えている。逆送駆動ローラ１１と逆送従動ローラ１２とで逆送経路１を介して搬送される記録紙Ｐを挟持し、逆送駆動ローラ１１の駆動回転によって、表面に記録実行後の記録紙Ｐを給紙手段へ向けて逆送する。
【００４８】
さらに、記録面反転給紙手段は、逆送経路１内に紙検出器１３を備えている。紙検出器１３は、前述の紙検出器５６と同様に、立位姿勢への自己復帰習性が付与され、かつ記録紙逆送方向にのみ回動し得るよう記録紙Ｐの逆送経路内に突出する状態で枢支されたレバー部１３ａを有し、このレバー部１３ａの先端が記録紙Ｐに押されることでレバー部１３ａが回動し、それによって記録紙Ｐが検出される構成を成している。
【００４９】
つづいて、本願発明に係る「記録面反転給紙手段」によって、記録紙Ｐの両面に記録を実行する際に、表面に記録実行後の記録紙Ｐをその終端側から搬送方向と逆方向に逆送経路１を介して給紙手段に向けて逆送し、記録紙Ｐの裏面の終端側から給紙手段によって給紙し、裏面に記録を実行し排出する工程について説明する。
【００５０】
図３は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、記録紙Ｐを給紙し、表面に記録を実行している状態を示したものである。
【００５１】
まず、ホッパー７７が符号Ａで示した矢印の方向に上昇することによって、給紙カセット７０に積重された記録紙Ｐの最上位の記録紙Ｐがピックアップローラ７２に押しつけられる。次に、ピックアップローラ７２が符号Ｂの矢印で示した回転方向に回転することによって、ピックアップローラ７２に押しつけられている記録紙Ｐの始端が、給紙ローラ７１とリバースローラ７４とのニップ点（ローラ同士の接触点）に到達する。
【００５２】
つづいて、記録紙Ｐの始端は、給紙ローラ７１が符号Ｃの矢印で示した回転方向に回転することによって、搬送駆動ローラ５１及び搬送従動ローラ５２のニップ点に到達する。リバースローラ７４の回転軸は給紙方向と逆方向、つまり記録紙Ｐを給紙カセット７０内に戻す方向に駆動回転している。そして、その回転軸にリバースローラ７４は、一定の回転抵抗を有した状態で従動回転可能に軸支されている。したがって、給紙ローラ７１とリバースローラ７４との間に記録紙Ｐが１枚だけ挟持された状態においては、給紙ローラ７１の駆動回転によって給紙される記録紙Ｐに従動して回転する（符号Ｄの矢印で示した回転方向）。
【００５３】
一方、給紙ローラ７１とリバースローラ７４との間に複数枚の記録紙Ｐが挟持された状態においては、複数の記録紙Ｐ間の摩擦抵抗よりリバースローラ７４の回転抵抗の方が大きいので、リバースローラ７４は、リバースローラ７４を軸支している回転軸の駆動回転によって、記録紙Ｐを給紙カセット７０内に戻す方向に回転し、リバースローラ７４に接している記録紙Ｐは、給紙カセット７０内に戻されることになる。このように、リバースローラ７４は、給紙ローラ７１とのニップ点において、複数の重なった状態の記録紙Ｐを分離し、給紙ローラ７１の回転によって複数の記録紙Ｐが給紙されるのを防止する役割を成している。
【００５４】
尚、ホッパー７５の端部近傍に配設されている高摩擦部材７６は、ホッパー７５に積重されている記録紙Ｐの最上位の記録紙Ｐが、ピックアップローラ７２によって給紙ローラ７１へ送られる際に、その積重された記録紙Ｐが一緒に給紙方向に動いてしまうことを防止し、それによって、記録紙Ｐが重なった状態で給紙される虞を低減させている。コイルばね７７は、ホッパー７５を上昇させるために、ホッパー７５が下降した状態でホッパー７５と給紙カセット７０の底部との間に縮設されている。ゲートローラ７３は、記録紙Ｐを給紙ローラ７１に押し当てつつ回転する。
【００５５】
つづいて、給紙ローラ７１の回転によって搬送駆動ローラ５１と搬送従動ローラ５２とのニップ点に始端が到達した記録紙Ｐは、搬送駆動ローラ５１の駆動回転によって、副走査方向Ｙへ間欠的に所定の搬送量で搬送されつつ、主走査方向Ｘに往復動するキャリッジ６２に搭載された記録ヘッド６３から記録面にインクを吐出されて表面に記録が実行される。そして、記録紙Ｐは、排紙駆動ローラ５４と排紙従動ローラ５５との間に挟持された状態で、排紙駆動ローラ５４の駆動回転によって引き続き副走査方向Ｙへ搬送される。
【００５６】
図４は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、表面に記録実行後の記録紙Ｐが、待避経路Ｓへ誘導され、待避トレイ２へ搬送される状態を示したものである。排紙駆動ローラ５４の駆動回転によって引き続き副走査方向Ｙへ搬送される記録紙Ｐは、湾曲経路３の揺動部３３が符号Ｆの矢印で示した方向に揺動することによって、待避経路Ｓへ誘導されて待避トレイ２へと搬送される。
【００５７】
図５は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、表面に記録実行後の記録紙Ｐが、待避トレイ２へ搬送された状態を示したものである。
【００５８】
副走査方向Ｙの下流側の排紙駆動ローラ５４と排紙従動ローラ５５とのニップ点を通過した記録紙Ｐは、同図に示した状態で一旦停止する。そして、双方向搬送従動ローラ４２が符号Ｇの矢印で示した方向に移動することによって、待避トレイ２の記録紙Ｐの終端近傍は、双方向搬送駆動ローラ４１と、双方向搬送従動ローラ４２との間に挟持されるとともに、逆送経路１の入口側へ誘導される。
【００５９】
これによって、表面に記録実行後の記録紙Ｐの終端を確実に逆送経路１の入口へ誘導することができる。また、記録済みの記録面側の終端を押動して逆送経路１へ誘導した際に、双方向搬送従動ローラ４２が記録紙Ｐの移動にともなって従動回転するので、記録済みの記録面に負荷が作用せず、記録面を傷つけてしまう虞を少なくすることができる。
【００６０】
図６は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、待避トレイ２へ搬送された表面に記録実行後の記録紙Ｐの終端近傍が、逆送経路１の入口側へ誘導された状態を示したものである。
【００６１】
待避トレイ２へ搬送された表面に記録実行後の記録紙Ｐの終端近傍は、双方向搬送従動ローラ４２が移動することによって、その終端近傍が逆送経路１の入口側へ誘導される。そして、双方向搬送駆動ローラ４１と双方向搬送従動ローラ４２との間に挟持された状態となる。双方向搬送駆動ローラは、記録紙Ｐへの記録実行時には、副走査方向Ｙに駆動回転するが、記録紙をその終端側から逆送経路１を介して給紙手段に向けて搬送する際には、副走査方向Ｙと逆方向、つまり逆送方向Ｒに駆動回転して記録紙Ｐを逆送経路１へ向けて搬送する。
【００６２】
図７は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、待避トレイ２へ搬送された表面に記録実行後の記録紙Ｐ終端を、逆送経路１を介して給紙手段へ逆送した状態を示したものである。
【００６３】
逆送駆動ローラ１１を逆送方向Ｒへ駆動回転させることによって、待避トレイ２に待避させた表面に記録実行後の記録紙Ｐを、その終端が給紙ローラ７１とリバースローラ７４とのニップ点の近傍に到達する位置まで逆送する。駆動回転する逆送駆動ローラ１１は、記録紙Ｐの記録実行済みの記録面と反対側の面に接するので、逆送駆動ローラ１１と記録紙Ｐとの間にスリップが生じても記録実行後の記録面にスリップ痕がついてしまう虞をなくすことができる。
【００６４】
この際、逆送経路１内に配設されている紙検出器１３で表面に記録実行後の記録紙Ｐの終端を検出した時点から、所定の搬送量だけ逆送駆動ローラ１１を駆動回転させることによって、表面に記録実行後の記録紙Ｐの終端が給紙ローラ７１とリバースローラ７４とのニップ点の近傍に位置するまで逆送する。そして、紙検出器１３で表面に記録実行後の記録紙Ｐの終端を検出することによって、給紙手段によって給紙される記録紙Ｐが、表面に記録実行済みで、その裏面が記録面となっている記録紙Ｐであることを識別することが可能になる。
【００６５】
また、この状態において、表面に記録実行後の記録紙Ｐは、表裏が反転して表面が下側になり、表面に記録実行時の終端側から給紙される状態になる。また、排出経路Ｅから待避していた湾曲経路３の揺動部３３は、符号Ｈの矢印で示した方向に揺動して、排出経路Ｅに戻る。
【００６６】
図８は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、表面に記録実行後の記録紙Ｐを給紙手段によって給紙し、裏面に記録を実行している状態を示したものである。
【００６７】
給紙カセット７０に積重された記録紙Ｐの最上位の記録紙Ｐを給紙するときと同様に、まず、ホッパー７７が符号Ａで示した矢印の方向に上昇し、表面に記録実行後の記録紙Ｐは、ピックアップローラ７２に押しつけられる。次に、ピックアップローラ７２が符号Ｂの矢印で示した回転方向に回転することによって、表面に記録実行後の記録紙Ｐの終端は、給紙ローラ７１とリバースローラ７４とのニップ点に到達する。
【００６８】
つづいて、表面に記録実行後の記録紙Ｐの終端は、給紙ローラ７１が符号Ｃの矢印で示した回転方向に回転することによって、搬送駆動ローラ５１及び搬送従動ローラ５２のニップ点に到達する。つづいて、搬送駆動ローラ５１の駆動回転によって、副走査方向Ｙへ間欠的に所定の搬送量で搬送されつつ、主走査方向Ｘに往復動するキャリッジ６２に搭載された記録ヘッド６３から記録面にインクを吐出されて、表面に記録実行後の記録紙Ｐの裏面に、裏面の終端側から記録が実行される。そして、排紙駆動ローラ５４と排紙従動ローラ５５との間に挟持された状態で、排紙駆動ローラ５４の駆動回転によって引き続き副走査方向Ｙへ搬送される。
【００６９】
また、表面に記録実行後の記録紙Ｐの裏面に記録を実行する際には、あらかじめ双方向搬送従動ローラ４２を双方向搬送駆動ローラ４１からレリース、つまり符号Ｊの矢印で示した方向に移動させておく。これによって、表面に記録実行後の記録紙Ｐの裏面に記録を実行する際に、その始端側が双方向搬送駆動ローラ４１と双方向搬送従動ローラ４２とに挟持された状態で双方向搬送駆動ローラ４１が副走査方向Ｙへ駆動回転することによって、裏面に記録実行中の記録紙Ｐにバックテンションが作用してしまうことを防止することができる。
【００７０】
図９は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、裏面に記録が実行された記録紙Ｐが、排出経路Ｅへ排出されていく状態を示したものである。排紙駆動ローラ５４の駆動回転によって引き続き副走査方向Ｙへ搬送される裏面に記録実行中の記録紙Ｐは、湾曲経路３に配設されている排紙駆動ローラ３１ａ〜３１ｄ、及び排紙従動ローラ３２ａ〜３２ｄによって、湾曲経路３内を記録実行面（この場合は記録紙Ｐの裏面）が内側に湾曲される。
【００７１】
このように、記録実行後の記録紙Ｐの排出経路Ｅに、記録実行後の記録面を内側に湾曲させながら記録紙Ｐを反転させて排紙トレイへ排出する湾曲経路３が構成されているので、いわゆるコックリング現象により波打ち変形した記録紙Ｐを記録面が内側になる如く湾曲させることによって、湾曲方向と直交する方向の矯正力を記録紙Ｐに対して作用させることができる。
【００７２】
つまり、前述したように、主走査方向Ｘに波打ち変形した記録紙Ｐを、副走査方向Ｙに記録面が内側になる如く湾曲させることによって、湾曲方向と直交する方向の矯正力が記録紙Ｐに対して作用するので、主走査方向Ｘの矯正力が記録紙Ｐに作用することになる。したがって、コックリング現象によって生じた記録紙Ｐの主走査方向Ｘの波打ち変形を矯正することができる。
【００７３】
また、記録紙Ｐを湾曲させることによって、前面から給紙した記録紙Ｐが記録実行後、再び前面に排出されることになり、ユーザーにとっての使い勝手が向上する。さらに、記録紙Ｐの面を反転させて排出するので、記録実行後の記録面が下側になり、それによって、連続して複数の記録紙Ｐに実行した際に、排紙トレイに積重した記録実行後の記録紙Ｐは、記録実行順に積重されることになる。したがって、例えば複数のページを有する文書等を印刷した場合にもページ順通りに排紙トレイに積重されるので、ページ順に並び替える手間が不要になる。
【００７４】
図１０は、本願発明に係る「記録装置」としてのインクジェット式記録装置５０の要部側面図であり、裏面に記録実行後の記録紙Ｐが湾曲経路３を介して排出方向Ｅに排出される状態を示したものである。裏面に記録実行後の記録紙Ｐは、排紙駆動ローラ３１ａ〜３１ｄ、及び排紙従動ローラ３２ａ〜３２ｄによって、湾曲経路３内を記録実行面が内側に湾曲された状態で、図示していない排紙トレイへ排出される。
【００７５】
このようにして、表面に記録実行後の記録紙Ｐを、その記録紙Ｐの終端側から搬送方向、つまり副走査方向Ｙと逆方向に、搬送経路とは異なる逆送経路１を介して、給紙手段に向けて搬送するので、給紙する際に記録紙の終端の裏面側から給紙することになり、それによって、専用の反転ローラを設けることなく記録紙の面を反転させることができる。
【００７６】
また、面を反転させた記録紙Ｐを給紙する際に、給紙カセット７０から記録紙Ｐを給紙する給紙手段によって記録紙Ｐを給紙するので、記録紙Ｐの両面に記録を実行する際に、記録紙Ｐの表面に記録を実行する際の給紙制御手順と記録紙Ｐの裏面に記録を実行する際の給紙制御手順とを共通の制御手順とすることができる。したがって、記録紙Ｐの両面に記録を実行する際の給紙制御手順を簡略にすることができる。
【００７７】
他の実施の形態としては、上記実施例において、排出経路Ｅに湾曲経路３を構成しないものが挙げられる。そのような構成の記録装置であっても本願発明の実施は可能であり、本願発明による作用効果を得ることができるものである。
【００７８】
尚、上記実施例では、インクジェット式記録装置５０について説明したが、本願発明は上記実施例に限定されることなく、ファクシミリ装置、複写機、並びにファクシミリ／コピー複合機等の記録装置においても同様に、特許請求の範囲に記載した発明の範囲内で、種々の変形が可能であり、それらも本願発明の範囲内に含まれるものであることは言うまでもない。
【００７９】
【発明の効果】
本願発明によれば、専用の反転ローラを設けずに、記録装置内で記録紙の面を反転させて、記録紙の裏面に記録を実行して記録紙の両面に記録を実行することが可能な構成を有する記録装置において、記録紙の両面に記録を実行する際の給紙制御手順を簡略にすることができる。
【図面の簡単な説明】
【図１】本願発明に係る「記録装置」としてのインクジェット式記録装置の一実施の形態を示した斜視図である。
【図２】本願発明に係る「記録装置」としてのインクジェット式記録装置の一実施の形態を示した要部側面図である。
【図３】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、記録紙を給紙し、表面に記録を実行している状態を示したものである。
【図４】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、表面に記録実行後の記録紙が、待避経路へ誘導され、待避トレイへ搬送される状態を示したものである。
【図５】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、表面に記録実行後の記録紙が、待避トレイへ搬送された状態を示したものである。
【図６】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、待避トレイへ搬送された表面に記録実行後の記録紙の終端近傍が、逆送経路の入口側へ誘導された状態を示したものである。
【図７】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、待避トレイへ搬送された表面に記録実行後の記録紙終端を、逆送経路を介して給紙手段へ逆送した状態を示したものである。
【図８】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、表面に記録実行後の記録紙を給紙手段によって給紙し、裏面に記録を実行している状態を示したものである。
【図９】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、裏面に記録が実行された記録紙が、排出経路へ排出されていく状態を示したものである。
【図１０】本願発明に係る「記録装置」としてのインクジェット式記録装置の要部側面図であり、裏面に記録実行後の記録紙が湾曲経路を介して排出方向に排出される状態を示したものである。
【符号の説明】
１逆送経路
２待避トレイ
３湾曲経路
１１逆送駆動ローラ
１２逆送従動ローラ
１３紙検出器（逆送経路）
３１ａ〜３１ｄ排紙駆動ローラ（湾曲経路）
３２ａ〜３２ｄ排紙従動ローラ（湾曲経路）
３３揺動部
４１双方向搬送駆動ローラ
４２双方向搬送従動ローラ
５０インクジェット式記録装置
５１搬送駆動ローラ
５２搬送従動ローラ
５３プラテン
５４排紙駆動ローラ
５５排紙従動ローラ
５６紙検出器
７０給紙カセット
７１給紙ローラ
７２ピックアップローラ
７３ゲートローラ
７４リバースローラ
７５ホッパー
７６高摩擦部材
７７コイルばね
Ｅ排出経路
Ｐ記録紙
Ｒ逆送方向
Ｓ待避経路
Ｘ主走査方向
Ｙ副走査方向[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording apparatus having a configuration capable of recording on both sides of a recording sheet.
[0002]
[Prior art]
Conventionally, after recording on the front surface of the secondary recording paper, the recording paper surface is reversed in the recording apparatus, and recording is performed on the back surface of the recording paper to execute recording on both sides of the recording paper. As an example of this recording apparatus, a recording apparatus having a dedicated reversing roller for reversing the recording surface of recording paper is known. This is because the recording paper after recording is conveyed in the direction opposite to the conveying direction at the time of recording through the conveying path at the time of recording, and the recording paper is returned to the conveying path again while being reversed by a dedicated reverse roller. Thus, the recording surface is reversed.
[0003]
However, the provision of a dedicated reversing roller increases the cost of the recording apparatus and increases the size of the recording apparatus by the amount of space for the dedicated reversing roller. . Therefore, as a conventional technique for solving such a problem, without providing a dedicated reverse roller, the surface of the recording paper is reversed in the recording apparatus, and recording is performed on the back surface of the recording paper to perform both sides of the recording paper. A recording apparatus having a configuration capable of executing recording is well known, and examples thereof include Japanese Patent Laid-Open No. 2001-290313 and Japanese Patent Laid-Open No. 5-297762.
[0004]
[Problems to be solved by the invention]
However, since the recording apparatus disclosed in the above-described prior art feeds the recording paper directly to the recording execution area after reversing the surface of the recording paper, the recording paper is fed from a paper feed tray or a paper feed cassette. The paper feed control procedure for feeding paper is different from the paper feed control procedure for feeding paper to the recording execution area after reversing the recording paper after execution of recording. Therefore, there arises a problem that a paper feed control procedure becomes complicated when recording is performed on both sides of the recording paper.
[0005]
The present invention has been made in view of such a situation, and the problem is that the recording paper is reversed on the surface of the recording paper in the recording device without providing a dedicated reverse roller, and recording is performed on the back surface of the recording paper. In a recording apparatus having a configuration capable of executing and recording on both sides of a recording sheet, the paper feed control procedure when executing recording on both sides of the recording sheet is simplified.
[0006]
[Means for Solving the Problems]
  To achieve the above tasks,First of the present invention 1 Aspect ofAccording to the invention, a sheet feeding unit that feeds a recording sheet to a sheet feeding path, a recording sheet conveyance unit that conveys the recording sheet fed to the sheet feeding path by a predetermined conveyance amount, and the recording Recording execution means for executing recording on the recording surface of the recording paper conveyed through the conveyance path by the paper conveying means, and recording paper discharging means for discharging the recording paper that has been recorded by the recording execution means to the discharge path; The recording paper on which the recording has been performed on the surface by the recording execution means is directed to the paper feeding means in a direction opposite to the conveyance direction from the end side of the recording paper via a reverse feeding path different from the conveyance path. And a recording surface reversing paper feeding unit that feeds the back surface of the recording paper from the terminal end side of the recording paper to the paper feeding path as the recording surface by the paper feeding unit.
[0007]
Since the recording paper after recording is performed on the surface by the recording execution means, the recording paper is conveyed from the terminal end side of the recording paper in the direction opposite to the conveyance direction toward the paper feeding means via a reverse feeding path different from the conveyance path. When paper is fed to the recording execution area, paper is fed from the back side at the end of the recording paper, so that the surface of the recording paper can be reversed without providing a dedicated reverse roller.
[0008]
Also, when feeding the recording paper with the surface reversed to the recording execution area, the recording paper is fed by the paper feeding means for feeding the recording paper from a paper feed tray, a paper feed cassette, etc. When performing recording on both sides, a common control procedure may be used for the paper feed control procedure for executing recording on the front side of the recording paper and the paper feed control procedure for executing recording on the back side of the recording paper. it can.
[0009]
  ThisFirst of the present invention 1 Aspect ofAccording to the invention described in the above, when the paper is fed to the recording execution area, the paper is fed from the back side at the end of the recording paper, thereby reversing the surface of the recording paper without providing a dedicated reverse roller. Therefore, the size and cost of the recording apparatus can be reduced. In addition, when performing recording on both sides of the recording paper, common control is performed for the paper feeding control procedure for performing recording on the front surface of the recording paper and the paper feeding control procedure for performing recording on the back surface of the recording paper. Since it can be a procedure, an effect of being able to simplify the paper feed control procedure when recording on both sides of the recording paper is obtained.
[0010]
  Second aspect of the present inventionThe invention described inFirst aspect described aboveThe recording surface reversing paper feeding means includes a reverse driving roller that rotates in contact with the reverse side of the recording surface of the recording paper on the opposite side of the recording surface on which the recording has been performed, and the reverse feeding path. And a reversely driven roller that rotates in contact with the recording surface of the recording sheet that has been recorded, and is conveyed through the reverse path by the reversely driven roller and the reversely driven roller. The recording paper is sandwiched, and the recording paper is conveyed toward the paper feeding unit via the reverse feeding path by the driving rotation of the reverse driving roller. It is a recording device.
[0011]
As described above, the reverse drive roller and the reverse driven roller for nipping and transporting the recording paper in the reverse feed path are provided, and the reverse feed roller that is driven and rotated is a recording paper that has been recorded. Since it is in contact with the surface opposite to the surface, it is possible to eliminate the possibility of slip marks on the recorded recording surface even if slip occurs between the reverse feed roller and the recording paper.
[0012]
  ThisSecond aspect of the present inventionAccording to the invention described inFirst of the present invention 1 Aspect ofIn addition to the function and effect of the invention described in (3), even if slip occurs between the reverse drive roller and the recording paper, it is possible to eliminate the possibility of slip marks on the recorded recording surface. There is an effect that it is possible to reduce the possibility that the image quality of the recorded recording surface is deteriorated when the subsequent recording paper is conveyed in the reverse feeding path.
[0013]
  Third aspect of the present inventionThe invention described inNo. mentioned above 1 Aspect ofOrSecond aspectIn this case, during recording on the recording surface of the recording paper, when the recording paper is driven and rotated in the transport direction, the recording paper is transported from the terminal end side of the recording paper toward the paper feeding means via the reverse feed path. Includes a bidirectional conveyance drive roller that rotates in the direction opposite to the conveyance direction and conveys the recording sheet toward the reverse feed path, and can be driven and rotated while being urged by the bidirectional conveyance drive roller. And a bidirectional conveyance driven roller release means for releasing the bidirectional conveyance driven roller from the bidirectional conveyance drive roller. .
[0014]
When recording is performed on the recording surface of the recording paper, recording is performed by a bidirectional transport driving roller that is driven and rotated in the recording paper transport direction and a bidirectional transport driven roller that is biased by the bidirectional transport driving roller. The paper is nipped and the recording paper is conveyed to the discharge path by the driving rotation of the bidirectional conveyance driving roller. Also, when transporting the recording paper recorded on the surface toward the reverse path, after the recording on the recording paper, the vicinity of the end of the recording paper is sandwiched between the bidirectional transport driving roller and the bidirectional transport driven roller. When reaching the portion, the bidirectional conveyance driving roller is rotated in the reverse direction, whereby the recording paper recorded on the surface can be conveyed from the terminal side to the reverse feeding path.
[0015]
Then, the end of the recording paper reaches the paper feeding means via the reverse feed path, and is fed toward the recording execution area by the paper feeding means, and recording from the end side of the recording paper to the back surface is performed. At this time, when recording on the back surface of the recording paper is started, the bidirectional transport driving roller is driven and controlled to rotate in the transport direction of the recording paper. However, at that time, if the starting end side of the recording paper is still sandwiched between the bidirectional transport drive roller and the bidirectional transport driven roller, the bidirectional transport drive roller rotates in the transport direction, The starting end side of the recording sheet is pulled in the direction opposite to the recording sheet conveyance direction, and the back tension acts on the recording sheet that is being recorded on the back side when the recording sheet is conveyed in the conveying direction from the end side. It will be.
[0016]
Therefore, the bidirectional conveying driven roller from the time when the recording paper is fed by the paper feeding means from the end side of the recording paper and the recording is started on the back surface of the recording paper until the beginning of the recording paper passes through the recording paper discharging means. Is released (separated) by the bidirectional conveyance driven roller release means. As a result, the start end side of the recording paper on which recording is being performed on the back surface is in a free state, so that back tension can be prevented from acting on the recording paper.
[0017]
  ThisThird aspect of the present inventionAccording to the invention described inNo. mentioned above 1 Aspect ofOrSecond aspectIn addition to the operation and effect of the invention described in (2), the recording paper discharge means having a bidirectional conveyance driving roller that can be driven and rotated bidirectionally conveys the recording paper to the paper feeding means via the reverse feeding path, When recording is performed on the back side from the end side, it is possible to prevent the back tension from acting on the start end side of the recording paper, thereby preventing the possibility that the recording image quality is deteriorated.
[0018]
  Fourth aspect of the present inventionThe invention described inFirst to third aspects described aboveIn any one of the above, the recording surface reversing paper feeding means drives the rotational transport drive roller in the direction opposite to the transport direction to transport the recording paper toward the reverse feed path. A recording apparatus comprising a recording paper end guiding means for guiding the end of the paper to the reverse feed path.
[0019]
  Fourth aspect of the present inventionAccording to the invention described inFirst to third aspects described aboveIn addition to the operation and effect of the invention described in any of the above, when the recording paper recorded on the surface is transported from the terminal side to the reverse path, the recording paper end guidance for guiding the end of the recording paper to the reverse path Since the means is provided, the effect of being able to reliably guide the end of the recording paper after recording on the surface to the entrance of the reverse feed path is obtained.
[0020]
  Fifth aspect of the present inventionThe invention described inFourth aspect described aboveThe recording paper end guiding means includes a recording paper end guiding roller that is pivotally supported so as to be driven to rotate and is movably disposed so as to push the vicinity of the end of the recording paper to the entrance of the reverse feed path. It is the recording apparatus characterized by having the structure which has.
[0021]
  Fifth aspect of the present inventionAccording to the invention described inFourth aspect described aboveIn addition to the function and effect of the invention described in (1), the recording paper end guide roller rotatably supported by the recording paper is guided by pushing the vicinity of the end of the recording paper after recording on the surface to the entrance of the reverse feed path. Therefore, when pushing the end of the recorded recording surface side and guiding it to the reverse feed path, the recording paper end guide roller rotates in accordance with the movement of the recording paper, so a load is applied to the recorded recording surface. There is an effect that the risk of damaging the recording surface without acting can be reduced.
[0022]
  Sixth aspect of the present inventionThe invention described inFirst to fifth aspects described aboveIn any of the above, the recording apparatus is characterized in that a paper detector capable of detecting the recording paper is disposed in the reverse feed path.
[0023]
  Sixth aspect of the present inventionAccording to the invention described inFirst to fifth aspects described aboveIn addition to the operational effects of the invention described in any of the above, since a paper detector capable of detecting the recording paper is disposed in the reverse feeding path, the end position of the recording paper can be detected in the reverse feeding path. Then, it is possible to identify that the recording paper fed by the paper feeding means after that has been recorded on the front surface and the back surface is the recording paper. It is done.
[0024]
  Seventh aspect of the present inventionThe invention described inFirst to sixth aspects described aboveIn any one of the above, when a recording path is provided on the back side of the recording sheet that has been recorded on the front surface, a retract path that is different from the discharging path is provided downstream of the discharging unit in the discharging direction. A recording apparatus comprising: a recording paper start edge guiding means for guiding the start edge to the evacuation path.
[0025]
When recording on both sides of the recording paper, after recording on the front side, if the recording paper is discharged halfway to the discharge path and then reversely sent through the reverse path, the recording paper will be temporarily ejected to the discharge port. After the recording paper pops out, it enters the discharge port again. Therefore, at that time, the user may accidentally pull the recording paper that has jumped out to the discharge port.
[0026]
Therefore, when recording on both sides of the recording paper, after the recording on the front surface, the leading edge side of the recording paper is guided to the retreat path, and the recording paper is discharged to the retreat path without discharging the recording paper to the discharge path. By temporarily evacuating, the recording paper after execution of recording on the surface can be sent to the reverse feeding path from the end side of the recording paper without discharging the recording paper to the discharging path.
[0027]
  ThisSeventh aspect of the present inventionAccording to the invention described inFirst to sixth aspects described aboveIn addition to the operational effects of the invention described in any of the above, since the recording paper after recording on the surface can be sent to the reverse path from the end of the recording paper without discharging the recording paper to the discharge path, In addition, it is possible to eliminate the possibility that the user accidentally pulls out the recording paper after execution of recording.
[0028]
  Eighth aspect of the present inventionThe invention described inThe seventh aspect described aboveIn the recording apparatus, the discharge path includes a curved path for discharging the recording sheet while inverting the recording surface of the recording sheet inward.
[0029]
By curving the wavyly deformed recording paper so that the recording surface is inward, a correction force in a direction perpendicular to the bending direction can be applied to the recording paper. In other words, the correction force in the direction orthogonal to the curving direction acts on the recording paper by curving the recording paper that has been undulated in the main scanning direction so that the recording surface is inward in the sub-scanning direction. This corrective force acts on the recording paper. Therefore, the wavy deformation in the main scanning direction of the recording paper caused by the cockling phenomenon can be corrected by the curved path that inverts the recording paper after execution of the recording while curving the recording surface inward.
[0030]
  ThisEighth aspect of the present inventionAccording to the invention described inThe seventh aspect described aboveIn addition to the operational effects of the invention described in the above, the wavy deformation in the main scanning direction of the recording paper caused by the cockling phenomenon is corrected by a curved path that inverts the recording paper after recording while the recording surface is curved inward. Therefore, it is possible to obtain an operational effect of correcting the wavy deformation of the recording paper after the execution of recording due to the cockling phenomenon.
[0031]
In addition, by curving the recording paper and inverting it, it is possible to configure an ink jet recording apparatus in which the recording paper fed from the front surface is ejected to the front again after recording is performed.
[0032]
  Ninth aspect of the present inventionThe invention described inEighth aspect described aboveThe recording paper start edge guiding means is configured such that a part of the curved path swings and is retracted from the discharge path, whereby the recording paper after recording is guided to the retracted path. The recording apparatus is characterized by that.
[0033]
In this way, the recording paper start edge guiding means has a configuration in which a part of the curved path swings and retracts from the discharge path, so that the recording paper after recording is guided to the retract path, that is, Since a part of the curved path also serves as the recording paper start edge guiding means, it is not necessary to separately provide the recording paper start edge guiding means.
[0034]
  ThisNinth aspect of the present inventionAccording to the invention described inEighth aspect described aboveIn addition to the operational effects of the invention described in (1), since a part of the curved path also serves as the recording paper start edge guiding means, the operational effect that the recording paper starting edge guiding means can be configured efficiently can be obtained.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
First, a schematic configuration of an ink jet recording apparatus as a “recording apparatus” according to the present invention will be described.
FIG. 1 is a perspective view showing an embodiment of an ink jet recording apparatus as a “recording apparatus” according to the present invention, and FIG. 2 is a side view of an essential part.
[0036]
The ink jet recording apparatus 50 includes a carriage guide shaft 61 and a “recording execution unit” that performs recording by ejecting ink onto the recording surface while reciprocating on the recording surface of the recording paper P in the main scanning direction X. A carriage 62 that is supported by the sub-carriage guide shaft 61S and moves in the main scanning direction X is disposed. A recording head 63 that ejects ink onto the recording paper P is mounted on the carriage 62. A platen 53 that defines the distance between the head surface of the recording head 63 and the recording paper P is provided facing the recording head 63. An operation of ejecting ink from the head surface of the recording head 63 to the recording paper P while reciprocating the carriage 62 in the main scanning direction X, and an operation of conveying the recording paper P by a predetermined conveyance amount in the sub-scanning direction Y. By alternately repeating the above, recording is performed on the recording paper P.
[0037]
In addition, the ink jet recording apparatus 50 has a configuration in which a paper feeding cassette 70 on which a large number of recording papers P can be stacked can be mounted. The “paper feed” of the recording paper P is performed by the gate roller 73, the reverse roller 74, the hopper 75, the high friction member 76, and the paper feed roller 71 and the pickup roller 72 provided in the ink jet recording apparatus 50. A sheet feeding device as a “means” is configured.
[0038]
Further, the ink jet recording apparatus 50 is provided with a transport driving roller 51 and a transport driven roller 52 as “recording paper transport means” for intermittently transporting the fed recording paper P in the sub-scanning direction Y. ing. The conveyance driving roller 51 is rotationally controlled by a rotational driving force source, and the recording paper P is conveyed in the sub-scanning direction Y by the rotation of the conveyance driving roller 51. A plurality of transport driven rollers 52 are provided and are individually urged by the transport driving roller 51, and the recording paper P is brought into contact with the recording paper P when the recording paper P is transported by the rotation of the transport driving roller 51. Rotates following the conveyance.
[0039]
A paper detector 56 is disposed on the upstream side of the conveyance drive roller 51 in the sub-scanning direction Y. The paper detector 56 is provided with a lever portion 56a pivotally supported in a state of being projected into the conveyance path of the recording paper P so that the self-returning behavior to the standing posture is given and can be rotated only in the recording paper conveyance direction. The lever portion 56a is rotated when the leading end of the lever portion 56a is pushed by the recording paper P, whereby the recording paper P is detected.
[0040]
Further, the ink jet recording apparatus 50 is provided with a paper discharge driving roller 54 and a paper discharge driven roller 55 as “recording paper discharge means” for discharging the recording paper P after execution of recording. The paper discharge driving roller 54 is rotationally controlled by a rotational driving force source, and the recording paper P after recording is discharged in the sub-scanning direction Y by the rotation of the paper discharge driving roller 54. The paper discharge driven roller 55 is a toothed roller having a plurality of teeth around it and sharply sharpened so that the tip of each tooth makes point contact with the recording surface of the recording paper P. The paper discharge driven rollers 55 are individually urged to the paper discharge drive rollers 54 by a biasing force that is weaker than the biasing force of the transport driven roller 52 described above, and the recording paper P is discharged by the rotation of the paper discharge drive rollers 54. When the recording paper P is in contact with the recording paper P, the recording paper P is discharged and rotated. Then, the recording paper P after execution of recording is discharged downstream in the sub-scanning direction Y by the paper discharge driving roller 54 and the paper discharge driven roller 55.
[0041]
On the downstream side of the paper discharge driving roller 54 and the paper discharge driven roller 55, as a “discharge path”, the recording paper P is reversed while curving the recorded recording surface inward, and is discharged to a paper discharge tray (not shown). A curved path 3 for discharging is configured. As shown in the figure, the curved path 3 inverts the surface of the recording paper P after execution of recording and discharges it in the discharge direction E while curving the recording surface inward. A plurality of paper discharge driving rollers 31 and a paper discharge driven roller 32 are disposed in the curved path 3.
[0042]
The paper discharge drive rollers 31a to 31d are rotationally controlled by a rotational driving force source, similarly to the paper discharge drive roller 54 described above, and the recording paper P on the curved path is moved in the paper discharge direction E by the rotation of the paper discharge drive rollers 31a to 31d. Discharged. Similarly to the paper discharge driven roller 55, the paper discharge driven rollers 32a to 32d have a plurality of teeth around them and are sharply pointed so that the tips of the teeth make point contact with the recording surface of the recording paper P. It is a toothed roller. The paper discharge driving rollers 31a to 31d are individually urged by a biasing force that is weaker than the biasing force of the transport driven roller 52, and the recording paper P is discharged in the discharge direction E by the rotation of the paper discharge driving rollers 31a to 31d. When the recording paper P is touched, the recording paper P rotates following the discharge of the recording paper P.
[0043]
Further, the ink jet recording apparatus 50, as the “recording surface reversal paper feeding unit” according to the present invention, performs recording on the surface of the recording paper P by the recording execution unit when recording is performed on both sides of the recording paper P. Then, the recording paper P is conveyed toward the paper feeding means in the direction opposite to the conveyance direction from the end side of the recording paper P via the reverse feeding path 1 different from the conveyance path at the time of recording, and the recording paper P is conveyed by the paper feeding means. Means is provided for feeding the recording paper P from the end side to the paper feeding path with the back surface of the recording paper P as the recording surface.
[0044]
The recording surface reversing paper feeding means is provided with a retract tray 2 as a “retreat path” for temporarily retracting the recording paper P after recording on the front surface. In this way, since the recording paper P after execution of recording on the front surface can be sent from the terminal end side of the recording paper P to the reverse feeding path 1 without being discharged to the discharge path 1, the recording paper P after execution of recording on the front surface can be fed. It is possible to eliminate the possibility of the user pulling out by mistake.
[0045]
Further, the recording surface reversing paper feeding means guides the recording paper P in the recording paper conveyance direction, guides the starting edge of the recording paper P after recording in the retracting direction S, and retracts it to the retracting tray 2. Means ". The recording paper start edge guiding means is configured such that the rocking portion 33 of the curved path 3 is swung as shown in the drawing and retracted from the discharge path E to the position of the rocking portion 33a indicated by the one-dot chain line, thereby performing recording on the surface. The recording paper P is guided to the escape path 2. Thus, a part of the curved path 3 swings and is retracted from the discharge path E, whereby the recording paper P after execution of recording is guided to the retracted path S, that is, the curved path. Since a part of 3 also serves as the recording paper start edge guiding means, there is no need to separately provide the recording paper start edge guiding means.
[0046]
Further, the recording surface reversing paper feeding means guides the recording paper P after execution of recording, which has been saved in the saving tray 2, to the reverse feed path 1 (recording paper end guidance means), and sends the recording paper P back from the end side. A bidirectional conveyance driven roller 41 and a bidirectional conveyance driven roller 42 that convey to the path 1, and a “bidirectional conveyance driven roller release unit” that releases the bidirectional conveyance driven roller 42 from the bidirectional conveyance drive roller 41 are provided. Similarly to the paper discharge driven roller 55, the bidirectional transport driven roller 42 has a plurality of teeth around it, and teeth that are sharply acutely pointed so that the tips of the teeth make point contact with the recording surface of the recording paper P. It is a roller with attached.
[0047]
Further, the recording surface reversal paper feeding means is reversely fed to the inlet side of the reverse feeding path 1 and rotates while contacting the surface opposite to the recording surface of the recording paper P after execution of recording conveyed to the reverse feeding path 1. A driving roller 11 and a reversely fed driven roller 12 that rotates in contact with the recording surface are provided. The recording paper P conveyed through the reverse feeding path 1 is sandwiched between the reverse feeding driving roller 11 and the reverse feeding driven roller 12, and the recording paper P after the recording is performed on the surface by the driving rotation of the reverse feeding driving roller 11. Reverse feed to the paper feeding means.
[0048]
Further, the recording surface reversal paper feed means includes a paper detector 13 in the reverse feed path 1. Similar to the paper detector 56 described above, the paper detector 13 is provided with a self-returning behavior to a standing posture and can be rotated only in the recording paper reverse feeding direction in the reverse feeding path of the recording paper P. The lever portion 13a is pivotally supported in a protruding state, and the lever portion 13a rotates when the tip of the lever portion 13a is pushed by the recording paper P, whereby the recording paper P is detected. is doing.
[0049]
Subsequently, when recording is performed on both sides of the recording paper P by the “recording surface reversing paper feeding means” according to the present invention, the recording paper P after recording is performed on the front surface from the terminal side in the direction opposite to the transport direction. A process will be described in which the paper is fed back to the paper feeding unit via the reverse feeding path 1, the paper is fed by the paper feeding unit from the end of the back side of the recording paper P, the recording is executed on the back side, and the paper is discharged.
[0050]
FIG. 3 is a side view of an essential part of an ink jet recording apparatus 50 as a “recording apparatus” according to the present invention, and shows a state in which recording paper P is fed and recording is performed on the surface. .
[0051]
First, when the hopper 77 moves up in the direction of the arrow indicated by the symbol A, the uppermost recording sheet P of the recording sheets P stacked on the sheet feeding cassette 70 is pressed against the pickup roller 72. Next, when the pickup roller 72 rotates in the rotation direction indicated by the arrow B, the starting end of the recording paper P pressed against the pickup roller 72 is the nip point (the nipping point between the paper supply roller 71 and the reverse roller 74 ( The point of contact between the rollers).
[0052]
Subsequently, the starting end of the recording paper P reaches the nip point between the transport driving roller 51 and the transport driven roller 52 as the paper feed roller 71 rotates in the rotation direction indicated by the arrow C. The rotating shaft of the reverse roller 74 is driven to rotate in the direction opposite to the paper feeding direction, that is, the direction in which the recording paper P is returned into the paper feeding cassette 70. The reverse roller 74 is pivotally supported by the rotation shaft so as to be driven and rotated with a certain rotational resistance. Therefore, in a state where only one sheet of recording paper P is sandwiched between the paper feed roller 71 and the reverse roller 74, the recording paper P is rotated by being driven by the rotation of the paper feed roller 71 (see FIG. (Rotation direction indicated by arrow D).
[0053]
On the other hand, in a state where a plurality of recording papers P are sandwiched between the paper supply roller 71 and the reverse roller 74, the rotational resistance of the reverse roller 74 is larger than the frictional resistance between the recording papers P. The reverse roller 74 rotates in a direction to return the recording paper P into the paper feed cassette 70 by driving rotation of a rotary shaft that supports the reverse roller 74, and the recording paper P in contact with the reverse roller 74 is fed. It will be returned to the paper cassette 70. As described above, the reverse roller 74 separates the plurality of overlapping recording sheets P at the nip point with the sheet feeding roller 71, and the plurality of recording sheets P are fed by the rotation of the sheet feeding roller 71. It plays a role to prevent.
[0054]
Note that the high friction member 76 disposed near the end of the hopper 75 feeds the uppermost recording paper P of the recording paper P stacked on the hopper 75 to the paper feeding roller 71 by the pickup roller 72. In this case, the stacked recording sheets P are prevented from moving together in the sheet feeding direction, thereby reducing the possibility that the recording sheets P are fed in the overlapping state. The coil spring 77 is contracted between the hopper 75 and the bottom of the sheet feeding cassette 70 in a state where the hopper 75 is lowered in order to raise the hopper 75. The gate roller 73 rotates while pressing the recording paper P against the paper feed roller 71.
[0055]
Subsequently, the recording paper P whose starting edge has reached the nip point between the transport driving roller 51 and the transport driven roller 52 by the rotation of the paper feed roller 71 is intermittently moved in the sub-scanning direction Y by the drive rotation of the transport driving roller 51. Ink is ejected to the recording surface from the recording head 63 mounted on the carriage 62 that reciprocates in the main scanning direction X while being conveyed by a predetermined conveyance amount, and recording is performed on the surface. The recording paper P is continuously conveyed in the sub-scanning direction Y by the driving rotation of the paper discharge driving roller 54 while being sandwiched between the paper discharge driving roller 54 and the paper discharge driven roller 55.
[0056]
FIG. 4 is a side view of an essential part of an ink jet recording apparatus 50 as a “recording apparatus” according to the present invention. The recording sheet P after recording is guided on the front surface to the retreat path S and conveyed to the retreat tray 2. This shows the state to be performed. The recording paper P, which is continuously conveyed in the sub-scanning direction Y by the drive rotation of the paper discharge driving roller 54, swings in the direction indicated by the arrow F by the swinging portion 33 of the curved path 3, so that the shunt path S To the evacuation tray 2.
[0057]
FIG. 5 is a side view of an essential part of an ink jet recording apparatus 50 as a “recording apparatus” according to the present invention, and shows a state in which the recording paper P after recording is carried on the front surface is transported to the waiting tray 2. It is.
[0058]
The recording paper P that has passed through the nip point between the paper discharge driving roller 54 and the paper discharge driven roller 55 on the downstream side in the sub-scanning direction Y temporarily stops in the state shown in FIG. Then, as the bidirectional conveyance driven roller 42 moves in the direction indicated by the arrow G, the vicinity of the end of the recording paper P on the catch tray 2 is connected to the bidirectional conveyance drive roller 41, the bidirectional conveyance driven roller 42, and the like. And is guided to the inlet side of the reverse feed path 1.
[0059]
As a result, the end of the recording paper P after recording has been performed on the surface can be reliably guided to the entrance of the reverse feed path 1. Further, when the end of the recorded recording surface side is pushed and guided to the reverse feed path 1, the bidirectional transport driven roller 42 is driven to rotate as the recording paper P moves, so that the recorded recording surface is recorded. The possibility that the load does not act on the recording surface and damages the recording surface can be reduced.
[0060]
FIG. 6 is a side view of an essential part of an ink jet recording apparatus 50 as a “recording apparatus” according to the present invention, and the vicinity of the end of the recording paper P after the recording is performed on the surface conveyed to the retracting tray 2 is reversely fed. The state guided to the entrance side of the route 1 is shown.
[0061]
In the vicinity of the end of the recording paper P after execution of recording on the surface conveyed to the waiting tray 2, the vicinity of the end of the recording paper P is guided to the entrance side of the reverse feed path 1 by moving the bidirectional transport driven roller 42. And it will be in the state pinched between the bidirectional | two-way conveyance drive roller 41 and the bidirectional | two-way conveyance driven roller 42. FIG. The bidirectional transport driving roller is driven and rotated in the sub-scanning direction Y when recording on the recording paper P is performed, but when the recording paper is transported from the terminal side thereof toward the paper feeding means via the reverse feed path 1. Is driven and rotated in the reverse direction to the sub-scanning direction Y, that is, in the reverse feed direction R, and conveys the recording paper P toward the reverse feed path 1.
[0062]
FIG. 7 is a side view of an essential part of an ink jet recording apparatus 50 as a “recording apparatus” according to the present invention. The end of the recording paper P after the recording is performed on the surface conveyed to the evacuation tray 2 is shown in FIG. 2 shows a state of being fed back to the paper feeding means via
[0063]
By rotating the reverse drive roller 11 in the reverse feed direction R, the recording paper P after the recording is performed on the surface retracted in the retract tray 2 is terminated at the nip point between the paper feed roller 71 and the reverse roller 74. Back to the position that reaches the vicinity of. The reverse drive roller 11 that rotates is in contact with the surface of the recording paper P that is opposite to the recording surface on which recording has been performed. Therefore, even if a slip occurs between the reverse driving roller 11 and the recording paper P, after recording is performed. This eliminates the possibility of slip marks on the recording surface.
[0064]
At this time, the reverse drive roller 11 is driven to rotate by a predetermined conveyance amount from the time when the end of the recording paper P after execution of recording on the surface is detected by the paper detector 13 disposed in the reverse feed path 1. As a result, the recording paper P is fed back on the surface until the end of the recording paper P is positioned in the vicinity of the nip point between the paper feed roller 71 and the reverse roller 74. Then, the paper detector 13 detects the end of the recording paper P after the recording is performed on the front surface, so that the recording paper P fed by the paper feeding unit has been recorded on the front surface, and the back surface is the recording surface. It is possible to identify the recording paper P being made.
[0065]
Also, in this state, the recording paper P after recording on the front surface is reversed, the front surface is turned down, and the front surface is on the lower side, and the front surface is fed from the terminal side when recording is performed. Further, the swinging portion 33 of the curved path 3 that has been retracted from the discharge path E swings in the direction indicated by the arrow H and returns to the discharge path E.
[0066]
FIG. 8 is a side view of the main part of the ink jet recording apparatus 50 as the “recording apparatus” according to the present invention. The recording sheet P after recording is performed on the front surface by the sheet feeding means, and recording is performed on the back surface. It shows the state of being.
[0067]
As in the case of feeding the uppermost recording paper P of the recording paper P stacked in the paper feeding cassette 70, first, the hopper 77 rises in the direction of the arrow indicated by the symbol A, and after recording is performed on the surface. The recording paper P is pressed against the pickup roller 72. Next, when the pickup roller 72 rotates in the rotation direction indicated by the arrow B, the end of the recording sheet P after recording on the surface reaches the nip point between the sheet feeding roller 71 and the reverse roller 74. .
[0068]
Subsequently, the end of the recording paper P after recording on the front surface reaches the nip point between the transport driving roller 51 and the transport driven roller 52 by the paper feed roller 71 rotating in the rotation direction indicated by the arrow C. To do. Subsequently, the recording head 63 mounted on the carriage 62 reciprocally moved in the main scanning direction X while being transported intermittently in the sub-scanning direction Y by the driving rotation of the transport driving roller 51 from the recording head 63 to the recording surface. Ink is ejected, and recording is performed on the back surface of the recording paper P after recording is performed on the front surface from the end side of the back surface. Then, the paper is continuously conveyed in the sub-scanning direction Y by the driving rotation of the paper discharge drive roller 54 while being sandwiched between the paper discharge drive roller 54 and the paper discharge driven roller 55.
[0069]
Further, when recording is performed on the back surface of the recording paper P after recording has been performed on the front surface, the bidirectional transport driven roller 42 is moved from the bidirectional transport drive roller 41 in advance, that is, in the direction indicated by the arrow J. Let me. Thus, when recording is performed on the back surface of the recording paper P after recording has been performed on the front surface, the bidirectional transport drive roller with the start end being sandwiched between the bidirectional transport drive roller 41 and the bidirectional transport driven roller 42 By rotating the drive 41 in the sub-scanning direction Y, it is possible to prevent the back tension from acting on the recording paper P being recorded on the back surface.
[0070]
FIG. 9 is a side view of an essential part of the ink jet recording apparatus 50 as the “recording apparatus” according to the present invention, and shows a state in which the recording paper P on which recording has been performed on the back side is discharged to the discharge path E. It is a thing. The recording paper P that is being recorded on the back surface that is continuously conveyed in the sub-scanning direction Y by the drive rotation of the paper discharge drive roller 54 is the paper discharge drive rollers 31a to 31d disposed in the curved path 3, and the paper discharge follower. The recording execution surface (in this case, the back surface of the recording paper P) is curved inward in the curved path 3 by the rollers 32a to 32d.
[0071]
In this way, the curved path 3 for inverting the recording paper P and discharging it to the paper discharge tray while curving the recording surface after recording inward is formed in the discharging path E of the recording paper P after recording. Therefore, the correction force in the direction orthogonal to the bending direction can be applied to the recording paper P by curving the recording paper P that has been waved and deformed by the so-called cockling phenomenon so that the recording surface is inward.
[0072]
That is, as described above, by curving the recording paper P that has been wave-deformed in the main scanning direction X so that the recording surface is inward in the sub-scanning direction Y, the correction force in the direction orthogonal to the curving direction is increased. Therefore, the correction force in the main scanning direction X acts on the recording paper P. Therefore, the wavy deformation in the main scanning direction X of the recording paper P caused by the cockling phenomenon can be corrected.
[0073]
Further, by curving the recording sheet P, the recording sheet P fed from the front side is discharged to the front side again after execution of the recording, which improves usability for the user. Further, since the surface of the recording paper P is reversed and discharged, the recording surface after the recording is performed is on the lower side, so that when the recording paper P is continuously executed on a plurality of recording papers P, The recording sheets P after the execution of recording are stacked in the order of recording execution. Therefore, for example, even when a document having a plurality of pages is printed, it is stacked on the paper discharge tray in the page order, so that the trouble of rearranging in the page order becomes unnecessary.
[0074]
FIG. 10 is a side view of an essential part of an ink jet recording apparatus 50 as a “recording apparatus” according to the present invention, and the recording paper P after recording is discharged on the back surface in the discharge direction E via the curved path 3. It shows the state. The recording paper P after recording on the back surface is not shown in a state where the recording execution surface is curved inward in the curved path 3 by the paper discharge driving rollers 31a to 31d and the paper discharge driven rollers 32a to 32d. The paper is discharged to the paper output tray.
[0075]
In this way, the recording paper P after execution of recording on the front surface is conveyed from the end side of the recording paper P in the transport direction, that is, in the direction opposite to the sub-scanning direction Y, via the reverse feed path 1 different from the transport path. Since the paper is conveyed toward the paper feeding means, the paper is fed from the back side at the end of the recording paper when feeding, so that the surface of the recording paper can be reversed without providing a dedicated reverse roller. it can.
[0076]
Further, when the recording paper P having the reverse side is fed, the recording paper P is fed by the paper feeding means for feeding the recording paper P from the paper feeding cassette 70, so that recording is performed on both sides of the recording paper P. At the time of execution, a common control procedure can be used for the paper feed control procedure for executing recording on the front surface of the recording paper P and the paper feed control procedure for executing recording on the back surface of the recording paper P. Therefore, it is possible to simplify the paper feed control procedure when recording is performed on both sides of the recording paper P.
[0077]
As another embodiment, in the above embodiment, the discharge path E does not constitute the curved path 3. Even with such a recording apparatus, the present invention can be implemented, and the effects of the present invention can be obtained.
[0078]
In the above embodiment, the ink jet recording apparatus 50 has been described. However, the present invention is not limited to the above embodiment, and the same applies to a recording apparatus such as a facsimile machine, a copying machine, and a facsimile / copy multifunction machine. It goes without saying that various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention.
[0079]
【The invention's effect】
According to the present invention, it is possible to perform recording on both sides of the recording paper by inverting the surface of the recording paper in the recording apparatus and performing recording on the back surface of the recording paper without providing a dedicated reverse roller. In the recording apparatus having such a configuration, it is possible to simplify the paper feed control procedure when recording is performed on both sides of the recording paper.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of an ink jet recording apparatus as a “recording apparatus” according to the present invention.
FIG. 2 is a side view of an essential part showing an embodiment of an ink jet recording apparatus as a “recording apparatus” according to the present invention.
FIG. 3 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, and shows a state in which recording paper is fed and recording is performed on the surface.
FIG. 4 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, and shows a state in which recording paper after recording is guided on the surface is guided to a retreat path and conveyed to a retreat tray. It is shown.
FIG. 5 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, and shows a state in which recording paper after recording is carried on the surface is conveyed to a retreat tray.
FIG. 6 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, and the vicinity of the end of the recording paper after recording is recorded on the surface conveyed to the evacuation tray; It shows the state guided to the side.
FIG. 7 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, in which the end of the recording paper after recording is supplied to the surface conveyed to the evacuation tray via a reverse feed path; It shows the state of being fed back to the paper means.
FIG. 8 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, in which recording paper after recording is performed is fed on the front surface by a paper feeding unit, and recording is performed on the back surface; It shows the state of being.
FIG. 9 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, and shows a state in which recording paper on which recording has been performed on the back side is discharged to a discharge path; is there.
FIG. 10 is a side view of an essential part of an ink jet recording apparatus as a “recording apparatus” according to the present invention, and shows a state in which recording paper after recording is discharged on the back surface in a discharging direction through a curved path. Is.
[Explanation of symbols]
1 Reverse route
2 Retreat tray
3 Curved path
11 Reverse feed roller
12 Reverse driven roller
13 Paper detector (reverse feed path)
31a to 31d Paper discharge driving roller (curved path)
32a to 32d Paper discharge driven roller (curved path)
33 Swing part
41 Bidirectional transport drive roller
42 Bidirectional transport driven roller
50 Inkjet recording device
51 Conveyance drive roller
52 Conveyor driven roller
53 Platen
54 Discharge Drive Roller
55 Discharged driven roller
56 Paper detector
70 Paper cassette
71 Paper feed roller
72 Pickup roller
73 Gate Roller
74 Reverse Roller
75 hopper
76 High friction material
77 Coil spring
E Discharge route
P Recording paper
R Reverse direction
S Retreat route
X Main scan direction
Y Sub-scanning direction

Claims

A sheet feeding unit that feeds the recording sheet to a sheet feeding path; a recording sheet conveying unit that conveys the recording sheet fed to the sheet feeding path by a predetermined conveyance amount; Recording execution means for executing recording on the recording surface of the recording paper being conveyed, recording paper discharge means for discharging the recording paper that has been recorded by the recording execution means to a discharge path,
The recording paper on which the recording has been performed on the surface by the recording execution means is directed to the paper feeding means in a direction opposite to the conveyance direction from the end side of the recording paper via a reverse feeding path different from the conveyance path. A recording surface reversing paper feeding means for feeding the back surface of the recording paper as the recording surface from the end side of the recording paper to the paper feeding path by the paper feeding means ;
During recording execution on the recording surface of the recording paper, the recording paper rotates in the transport direction, and when the recording paper is transported from the terminal end side of the recording paper to the paper feeding unit via the reverse feed path, A bi-directional conveyance driving roller that rotates in the direction opposite to the conveyance direction and conveys the recording paper toward the reverse feeding path;
A bidirectional transport driven roller capable of being driven and rotated while being urged by the bidirectional transport drive roller;
A bidirectional conveyance driven roller release means for releasing the bidirectional conveyance driven roller from the bidirectional conveyance drive roller;
Provided on the downstream side in the discharge direction of the discharge means, a retreat path different from the discharge path,
A recording paper starting edge guiding means for guiding the starting edge of the recording paper to the retract path when recording on the back surface of the recording paper that has been recorded on the front surface;
The recording surface reversing paper feeding means drives and rotates the bi-directional transport driving roller in a direction opposite to the transport direction to transport the recording paper toward the reverse feed path. It has recording paper end guidance means to guide to the reverse feed path,
The recording paper end guiding means includes the bidirectional conveying driven roller that is pivotally supported so as to be driven to rotate and is movably disposed so as to push the vicinity of the end of the recording paper to the entrance of the reverse feed path. Made up of
The discharge path has a curved path that reverses and discharges the recording paper while curving the recording surface of the recording paper inward.
The recording apparatus, wherein when the recording is performed on the back surface of the recording paper after the recording is performed on the front surface, the bidirectional transport driven roller is released from the bidirectional transport driving roller .

2. The reverse feeding roller according to claim 1, wherein the recording surface reversing paper feeding unit is driven to rotate in contact with a surface opposite to the recording surface on which the recording has been performed on the recording paper. A reversely driven roller that rotates in contact with the recording surface of the recording sheet that has been recorded on the recording sheet conveyed via the reverse feed roller and the reversely driven roller via the reverse feed path. The recording paper to be conveyed is sandwiched, and the recording paper is conveyed toward the paper feeding means via the reverse feeding path by driving rotation of the reverse feeding driving roller. Recording device.

3. The recording apparatus according to claim 1, wherein a paper detector capable of detecting the recording paper is disposed in the reverse feed path.

4. The recording sheet start edge guiding unit according to claim 1, wherein a part of the curved path swings and retracts from the discharge path, whereby the recording sheet after recording is stored in the retracting path. 5. A recording apparatus characterized in that the recording apparatus is configured to be guided to a route.