JP2004352416A - Lever for detection of pass of recorded medium, and recording device - Google Patents

Lever for detection of pass of recorded medium, and recording device Download PDF

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JP2004352416A
JP2004352416A JP2003150413A JP2003150413A JP2004352416A JP 2004352416 A JP2004352416 A JP 2004352416A JP 2003150413 A JP2003150413 A JP 2003150413A JP 2003150413 A JP2003150413 A JP 2003150413A JP 2004352416 A JP2004352416 A JP 2004352416A
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recording medium
recording
contact
lever
medium
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JP2003150413A
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JP4292384B2 (en
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Tokujiro Okuno
徳次郎 奥野
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Seiko Epson Corp
セイコーエプソン株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lever for detection of pass of paper that is correctly capable of detecting pass of a paper rear end. <P>SOLUTION: A lever 15 to detect pass of recording paper P is provided close to the upstream side of a carrying drive roller 21 to carry the recording paper P to a recording head. The lever 15 is provided on a paper guide member 18 oscillatably around an oscillation shaft 15a to oscillate as the recording paper P passes. A top part of a contact end 15d protruded into a paper carrying passage is formed in a roughly overturned L-form, and a contact surface 15e to get in contact with a back surface of the recording paper P is formed as a flat surface. As the rear end of the recording paper P passes, the rear end of the recording paper P gets in surface contact with the contact surface 15e, so that the contact end 15d is hard to be separated from the rear end of the recording paper P. Pass of the rear end of the recording paper P can thus be correctly detected. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、被記録媒体に記録を行う記録装置の被記録媒体搬送経路において揺動可能に設けられる被記録媒体通過検出用レバー及び当該レバーを備えた記録装置に関する。また、本発明は、液体噴射装置に関する。
【0002】
ここで、液体噴射装置とは、インクジェット式記録ヘッドが用いられ、該記録ヘッドからインクを吐出して被記録媒体に記録を行うプリンタ、複写機およびファクシミリ等の記録装置に限らず、インクに代えてその用途に対応する液体を前記インクジェット式記録ヘッドに相当する液体噴射ヘッドから被記録材に相当する被噴射媒体に噴射して、前記液体と前記被噴射媒体に付着させる装置を含む意味で用いる。
【0003】
液体噴射ヘッドとして、前記記録ヘッドの他に、液晶ディスプレー等のカラーフィルター製造に用いられる色材噴射ヘッド、有機ELディスプレーや面発光ディスプレー(FED)等の電極形成に用いられる電極材(導電ペースト)噴射ヘッド、バイオチップ製造に用いられる生体有機物噴射ヘッド、精密ピペットとしての試料噴射ヘッド等が挙げられる。
【0004】
【従来の技術】
FAX、プリンタ等に代表される記録装置においては、用紙を搬送する用紙搬送経路の所定の位置に、用紙の通過を検出する用紙通過検出手段を設け、必要な紙送り制御を行う。代表的な用紙通過検出手段としては、用紙搬送経路に揺動可能に設けられるレバーと、当該レバーの揺動状態を検出する検出部とを備えたものがある。レバーは、用紙との非係合状態では、付勢手段の付勢力によって用紙と接触する接触端が用紙搬送経路に突出し、用紙の通過に伴って用紙と係合すると、揺動して接触端が用紙搬送経路から退避する。また、レバーには、用紙搬送経路の上側から下側に突出する様に設けられるもののほか、下側から上側に突出する様に設けられるものもある(例えば、特許文献1参照)。この様なレバーの利点の1つとしては、用紙のうら面と接することであり、即ち例えば銀塩写真並の高画質印刷を実行可能なプリンタにおいて印刷面にコート層を有する専用紙を用いる際に、当該コート層にダメージを与えない、といった点がある。
【0005】
【特許文献1】
特開平8−259037号公報
【0006】
【発明が解決しようとする課題】
ところで、例えばインクジェットプリンタにおいては、インクジェット記録ヘッドへ用紙を搬送する搬送ローラと、記録の行われた用紙を排出する排出ローラとで、下に凸となる様な湾曲姿勢を用紙に与え、これにより、プラテンからの用紙の浮きを防止して用紙とインクジェット記録ヘッドとの距離を均一に保持する様に構成されるものがある。この様なインクジェットプリンタにおいて、搬送ローラの上流側に、レバーを用紙搬送経路の下側から上側に突出する様に設けると、用紙後端が通過する際に、上方に反り返った状態となる用紙後端と、付勢手段によって用紙搬送経路に突出しようとするレバーとの相乗効果により、用紙後端が通過しないにもかかわらずレバーが用紙後端から外れ、用紙後端の通過が検出されてしまうといった問題が生じる虞がある。
そこで本発明はこの様な問題に鑑みなされたものであり、その課題は、用紙後端の通過を正確に検出することのできる用紙通過検出用レバーを得ることにある。
【0007】
【課題を解決するための手段】
上記課題を解決するために、本発明の第1の態様は、被記録媒体に記録を行う記録装置における被記録媒体搬送経路に設けられるとともに、被記録媒体との非係合状態では付勢手段の付勢力を受けて被記録媒体と接触する接触端が被記録媒体搬送経路に突出し、被記録媒体と係合すると、前記接触端が被記録媒体搬送経路から退避する様に揺動可能に設けられる被記録媒体通過検出用レバーであって、前記接触端の頂部が、被記録媒体のおもて面又はうら面と面接触する様に平坦部を備えて成されていることを特徴とする。
【0008】
上記第1の態様によれば、被記録媒体通過検出用レバー(以下「レバー」と略称する)は、被記録媒体と接触する接触端の頂部が被記録媒体のおもて面またはうら面と面接触する様に平坦部を備えて成されているので、被記録媒体と面接触することにより、レバーの状態が安定し、被記録媒体後端が通過する際に、不適切な位置でレバーが被記録媒体後端から外れることがなく、被記録媒体後端の通過を正確に検出することが可能となる。
【0009】
本発明の第2の態様は、上記第1の態様において、前記頂部が、被記録媒体搬送経路を側視して、その先端が被記録媒体搬送経路の下流側を向く様な略逆L字形の形状に形成されていることを特徴とする。
上記第2の態様によれば、レバーの頂部が、被記録媒体搬送経路を側視して、被記録媒体搬送経路の下流側を向く様な略逆L字形の形状に形成されているので、レバーの頂部が被記録媒体へ与える力の成分がより一層被記録媒体の搬送経路と直交する方向に向かい、被記録媒体後端の通過に際してレバーが外れ難くなり、より一層被記録媒体後端の通過を正確に検出することが可能となる。
【0010】
本発明の第3の態様は、上記第1のまたは第2の態様において、前記平坦部が、被記録媒体との非係合状態において、当該被記録媒体通過検出用レバーの揺動支点に対して被記録媒体の搬送方向下流側に位置する様に形成されていることを特徴とする。
上記第3の態様によれば、被記録媒体との非係合状態において、前記平坦部が、レバーの揺動支点に対して被記録媒体の搬送方向下流側に位置する様に形成されているので、被記録媒体と係合してレバーが揺動する際の、当該揺動角度を最小限に抑えることができ、レバーの設置スペースを最小限に抑えることができる。
【0011】
本発明の第4の態様は、被記録媒体に記録を行う記録ヘッドと、前記記録ヘッドへ被記録媒体を搬送する、回転駆動される搬送駆動ローラ及び当該搬送駆動ローラに圧接して従動回転する搬送従動ローラを備えて構成された搬送ローラと、を有する記録装置であって、請求項1から3のいずれか1項に記載された前記被記録媒体通過検出用レバーを備えていることを特徴とする。
上記第4の態様によれば、記録装置は上述した第1から第3の態様のレバーを備えているので、上述した第1から第3の態様と同様な作用効果を得ることができる。
【0012】
本発明の第5の態様は、上記第4の態様において、前記搬送駆動ローラに上から圧接する前記搬送従動ローラの回転中心が、前記搬送駆動ローラの回転中心に対して被記録媒体搬送経路の下流側に配置され、前記被記録媒体通過検出用レバーが、前記搬送駆動ローラの上流側において、被記録媒体搬送経路の下側から上側に突出する様に設けられていることを特徴とする。
上記第5の態様によれば、搬送駆動ローラに上から圧接する搬送従動ローラの回転中心が、搬送駆動ローラの回転中心に対して下流側に配置されていることから、搬送ローラの上流側では、被記録媒体が上方に反り返る様な状態となり、レバーが被記録媒体後端から外れ易い状態となるが、上述した第1の態様の作用効果により、この様な状態でもレバーが被記録媒体後端から安易に外れることがなく、被記録媒体後端の通過を正確に検出することが可能となる。
【0013】
本発明の第6の態様は、上記第4のまたは第5の態様において、前記被記録媒体通過検出用レバーにおいて被記録媒体先端と当接する当接部が、被記録媒体搬送経路を略垂直に横切る様に成されていることを特徴とする。
上記第6の態様によれば、前記被記録媒体通過検出用レバーにおいて被記録媒体先端と当接する当接部が、被記録媒体搬送経路を略垂直に横切る様に成されているので、被記録媒体先端がレバーのどの部分に当接しても、殆ど同じタイミングで揺動し、従って被記録媒体先端の通過タイミングにばらつきが生じることなく、被記録媒体先端の通過を正確に検出することができる。
【0014】
本発明の第7の態様は、被噴射媒体に液体噴射を行う液体噴射ヘッドと、前記液体噴射ヘッドへ被噴射媒体を搬送する、回転駆動される搬送駆動ローラ及び当該搬送駆動ローラに圧接して従動回転する搬送従動ローラを備えて構成された搬送ローラと、被噴射媒体搬送経路に設けられるとともに、被噴射媒体との非係合状態では付勢手段の付勢力を受けて被噴射媒体と接触する接触端が被噴射媒体搬送経路に突出し、被噴射媒体と係合すると、前記接触端が被噴射媒体搬送経路から退避する様に揺動可能に設けられる被噴射媒体通過検出用レバーと、を有する液体噴射装置であって、前記接触端の頂部が、被噴射媒体のおもて面又はうら面と面接触する様に平坦部を備えて成されていることを特徴とする。
【0015】
【発明の実施の形態】
以下、図1乃至図4を参照しながら本発明の一実施形態について説明する。ここで、図1は本発明に係る「記録装置」、「液体噴射装置」の一例としてのインクジェットプリンタ(以下「プリンタ」と言う)1の装置本体の外観斜視図、図2は同側断面概略図、図3は紙検出器の側面図、図4はレバー15の動作を示す説明図である。尚、以下では、用紙搬送経路の上流側(図2の右側)を単に「上流側」と言い、用紙搬送経路の下流側(図2の左側)を単に「下流側」と言うこととする。
【0016】
先ず、図1及び図2を参照しながらプリンタ1の構成について概説する。プリンタ1は、「被記録媒体、「被噴射媒体」の一例としてのハガキ、L判サイズ等の記録用紙Pへの記録に適した小型サイズに構成され、A4サイズの記録に好適である一般的なインクジェットプリンタと同様に、装置後部に記録用紙Pを傾斜姿勢で複数枚セット可能な給紙装置2を、装置中程に主走査方向に往復動可能に設けられるキャリッジ25を、装置前部には記録の行われた記録用紙Pをスタックするスタッカ(図示せず)を備えている。
【0017】
給紙装置2は、ホッパ10と、可動ガイド9と、固定ガイド8と、給送ローラ11と、摩擦分離材13と、紙戻しレバー12と、を備えている。ホッパ10は揺動支点10aを中心に図示しない駆動手段によって揺動駆動される様に設けられ、記録用紙Pを傾斜姿勢に支持するとともに、記録用紙Pの給送時には、給送ローラ11に記録用紙Pを圧接させる。ホッパ10に設けられた固定ガイド8と可動ガイド9とは記録用紙Pの側端位置を規制し、また、可動ガイド9は、記録用紙Pの各サイズに対応する様に、記録用紙Pの幅方向にスライド可能に設けられている。
【0018】
給送ローラ11は側面視略D形の形状をなし、外周にはゴム材が巻回され、図示しない駆動モータによって用紙給送時に選択的に回転駆動される。用紙給送時には、その円弧部分によって給送ローラ11に圧接した記録用紙Pの最上位のものを下流側へ給送し、用紙給送が終了すると、下流側の搬送駆動ローラ21による搬送動作の際に搬送負荷を生じさせない様、図示する様に側面視略D形の形状における平坦部が摩擦分離材13と対向する様に制御される。尚、符号14で示すローラは自由回転可能なアイドルローラであり、搬送中の記録用紙Pが給送ローラ11に接して搬送負荷を生じさせない様、搬送中の記録用紙Pと接して従動回転する。このアイドルローラ14は、本実施形態では給送ローラ11を挟む様に給送ローラ11の両側に設けられている。
【0019】
給送ローラ11と対向する位置には摩擦分離材13が設けられている。摩擦分離材13は用紙給送時に給送ローラ11の円弧部分と圧接して圧接点を形成し、これにより、給送されるべき最上位の記録用紙Pと、重送されようとする次位以降の記録用紙Pとを分離する。また、給送ローラ11と対向する位置には紙戻しレバー12が設けられている。紙戻しレバー12は揺動支点12aを中心に揺動可能に設けられ、給送ローラ11の1回転動作中に、図2に示す待機状態から記録用紙Pの給送経路を開放する様に一旦倒れ、そして再び図2に示す様に起き上がることにより、重送されようとした次位以降の記録用紙Pをホッパ10上に戻す。
【0020】
以上が給紙装置2であり、給紙装置2の下流側には、給送ローラ11と搬送駆動ローラ21との間に「被記録媒体通過検出用レバー」としてのレバー15と検出部16とを備えて成る紙検出器17が設けられている。レバー15は揺動軸15aを中心に揺動可能に設けられ、且つ、揺動軸15aから上側部分が、「接触端」として、給送される記録用紙Pと接触可能に構成されている。検出部16は光学センサであり、レバー15の揺動軸15aから下側部分が図示する様に検出部16に入り込むことにより、発光部から受光部へ向かう光が遮断され、記録用紙Pの未通過状態が検出される。そして、レバー15が、記録用紙Pの通過に伴って揺動すると、レバー15の揺動軸15aから下側部分が検出部16から外れ、これにより、記録用紙P先端の通過を検出することができる様になっている。また、記録用紙P後端が通過すると、再びレバー15の下端部が検出部16に入り込み、これにより、記録用紙P後端の通過を検出可能となる。
【0021】
次に、紙検出器17の下流側には、搬送駆動ローラ21と搬送従動ローラ22とが設けられている(以下当該ローラ対を適宜「搬送ローラ」と言う)。搬送駆動ローラ21は図示しない駆動モータによって回転駆動され、搬送従動ローラ22は、搬送駆動ローラ21に圧接して従動回転する。搬送駆動ローラ21は回転軸芯線方向に長い金属棒体の外周に塗装膜が付着されることによって成され、搬送従動ローラ22は、搬送駆動ローラ21の軸方向に、所定の間隔で複数個設けられる。そして、給送ローラ11によって給送された記録用紙Pは搬送ローラにニップされ、記録ヘッド26へと搬送される。
【0022】
また、搬送従動ローラ22を軸支する搬送従動ローラホルダ20の下流側端部には、自由回転可能なガイドローラ23が設けられている。ガイドローラ23は、記録用紙Pのプラテン28からの浮き上がりを防止する為のローラであり、これにより、記録用紙Pと記録ヘッド14との距離が一定に保たれる。
【0023】
次に、搬送ローラの下流側には、記録ヘッド26とプラテン28とが対向する様に設けられている。記録ヘッド26はキャリッジ25の底部に設けられ、液体の一例としてのインク滴を記録用紙Pに向けて吐出(噴射)することにより、記録を実行する。キャリッジ25には主走査方向に延びるキャリッジガイド軸27が挿通し、また、主走査方向に延びる無端ベルト24(図1)の一部に固定されている。そして、キャリッジモータ19(図1)の動力を受けて、キャリッジガイド軸27にガイドされながら、主走査方向に往復駆動される。尚、本実施形態では、キャリッジ25はインクカートリッジを搭載せず、プリンタ1の装置本体底部に固設されるインクカートリッジ(図示せず)から、図示を省略するインクチューブを介して記録ヘッド26へとインクが供給される様に構成されている。
【0024】
プラテン28は、記録用紙Pを下から支持することにより、記録用紙Pと記録ヘッド25との間のギャップを規定するが、記録ヘッド25と対向する面には、凹部28aが形成されている。これは、記録用紙Pに余白無く印刷を行う為のものであり、記録用紙Pの端部にインク滴を吐出する際に、記録用紙P端部から外れた部分にもインク滴を吐出し、そして凹部28aへと打ち捨てることにより、所謂縁無し印刷が実行される。尚、凹部28aには、インク滴を吸収するインク吸収材36(図1)が配設されている。
凹部28aに打ち捨てられたインク滴は図示しない排出孔から下部へ排出され、そしてプラテン28の下部には、この排出されたインク滴を受ける廃液トレイ31が設けられている。廃液トレイ31の内部には廃液吸収材34が設けられ、廃液トレイ31内のインク廃液を確実に保持する。
【0025】
続いて、記録ヘッド26の下流側には、排出駆動ローラ29と、排出従動ローラ30とが設けられている(以下当該ローラ対を適宜「排出ローラ」と言う)。排出駆動ローラ29は図示しない駆動モータによって回転駆動され、排出従動ローラ30は、排出駆動ローラ29に接して従動回転する。そして、記録が行われた記録用紙Pは、これらローラにニップされることにより、図示しないスタッカへ向けて排出される。
【0026】
排出駆動ローラ29の下流側には、排出補助ローラ37が設けられている。排出補助ローラ37は、その回転軸37aと、排出駆動ローラ29の回転軸29aとに係回されたベルト38によって、排出駆動ローラ29の回転に従って回転する。この排出補助ローラ37は、排出駆動ローラ29及び排出従動ローラ30にニップされて排出される記録用紙Pの後端を、スタッカに向けて確実に落とす機能を果たすものである。
【0027】
ところで、搬送ローラと排出ローラとは、記録用紙Pをプラテン28に向けて押さえ付けることにより、記録用紙Pと記録ヘッド26との距離を一定に保つ様に構成されている。即ち、搬送ローラにおいては、搬送駆動ローラ21に上から圧接する搬送従動ローラ22の回転軸芯が、搬送駆動ローラ21の回転軸芯に対して下流側に位置するように構成され、排出ローラにおいては、排出駆動ローラ29に上から接する排出従動ローラ30の回転軸芯が、排出駆動ローラ29の回転軸芯に対して上流側に位置する様に構成されている。従ってこれにより、搬送ローラと排出ローラとの間で記録用紙Pが僅かに下に凸となる様に湾曲姿勢が与えられ、プラテン28に押さえ付けられて、記録ヘッド26との距離が一定に保たれる。
【0028】
続いて、図3及び図4を参照しながら、紙検出器17を構成するレバー15について詳説する。レバー15は、その揺動軸15aが用紙搬送経路の下側に設けられた紙案内部材18(図2)に軸支されることにより、紙案内部材18に取り付けられている。図3において、レバー15は、揺動軸15aから上側の接触端15dと、揺動軸15aから下側の検出端15bと、引っ張りコイルばね7を掛止する掛止部15cとを備えて成る。検出端15bは、レバー15が記録用紙Pと係合しない状態において、揺動軸15aからほぼ真っ直ぐ下に延び、その下端部が、レバー15の揺動に伴って検出部16に入り込み、又は検出部16から外れる。
【0029】
掛止部15cはフック形状を成し、一端が図示しない掛止部に掛止する引っ張りコイルばね7の他端が掛止することで、レバー15を図3に示すような立位姿勢に保持する。この様な立位姿勢では、接触端15dが、図2に示す様に記録用紙Pの搬送経路(以下「用紙搬送経路」と言う)の下側から上側に向けて、用紙搬送経路をほぼ垂直に横切る様に突出した状態となる。
【0030】
接触端15dは、記録用紙Pの先端が当接する当接面15fと、記録用紙Pのうら面と接する接触面(平坦面)15eとを備え、図示する様に略逆L字形の形状を成す様に形成されている。ここで、接触端15dは、記録用紙Pと係合しない状態を示す図3(実線)において、揺動軸15aから真っ直ぐに上方に延びるのではなく、一旦下流側に向けて斜め上方に延びた後に、ほぼ真っ直ぐ上方に延び、そしてその先端が下流側に向けて折れ曲がることで、略逆L字形の形状を成す様に形成されている。つまり、記録用紙Pとの非係合状態において、接触面15eが、揺動軸15aに対して下流側に位置する様に形成されている。
【0031】
この様に構成されたレバー15の作用効果について図4を参照して説明する。図4(A)は、用紙Pが当接面15fに当接した瞬間を示している。図示する様に、当接面15fが、用紙搬送経路をほぼ垂直に横切る様に設けられていることから、記録用紙Pの先端が当接面15fのどの部分に当接しても、レバー15は殆ど同じタイミングで揺動し、従って記録用紙P先端の通過タイミングにばらつきが生じることがなく、記録用紙Pの通過を正確に検出することができる。
【0032】
続いて、記録用紙Pが更に下流側に進むことにより、図4(B)に示す様にレバー15が揺動軸15aを中心に揺動し、接触端15dが、用紙搬送経路から退避する。ここで、上述の通り接触面15eが揺動軸15aに対して下流側に位置するように接触端15dが形成されていることから、レバー15の揺動角度を小さく抑えることができ、以て省スペース化に資すことができる。つまり、図4(A)の仮想線及び符号Aで示す様に、もし、接触面15eが揺動軸15aのほぼ真上から下流側に延びる様に成されていると、図4(B)から明かな様に、記録用紙Pと係合して揺動する際の揺動角度が大きくなり、これにより、レバー15は図4(B)に示す状態から更に反時計回りに所定角度揺動することになる。すると、反対側の検出端15bが、更に図4の右側に突出する為、図4におけるレバー15の右側のスペースをより多く必要とする。しかし、上述のようにレバー15の揺動角度が小さく抑えられているので、省スペース化に資すことができる。
【0033】
次に、図4(C)に示す様に、記録用紙Pの後端が搬送ローラの上流側近傍に到達した状態では、上述した様に搬送従動ローラ22の回転軸芯が搬送駆動ローラ21の回転軸芯よりも下流側に位置しているので、記録用紙Pの後端が、上方に反り返る様な状態となる。この様な状態の記録用紙P後端に、接触端15dが下から接触し、しかも引っ張りコイルばね7の付勢力によって記録用紙P後端を上方に持ち上げる様な力Fを記録用紙P後端に付与することから、接触端15dが記録用紙P後端から外れ易い状態となっている。しかし、接触端15dの頂部が、平坦面から成る接触面15eによって成されているので、記録用紙Pと面接触することにより、レバー15の状態が安定し、記録用紙P後端が通過する際にも、不適切な位置で接触端15dが外れることがなく、記録用紙P後端の通過を正確に検出することができる。
【0034】
また、接触端15dの頂部が、その先端が下流側を向くような略逆L字形の形状に形成されている為、記録用紙Pへ与える力の成分(符号Fで示す力)がより一層用紙搬送経路と直交する方向に向かい、これによって接触端15dが更に記録用紙P後端から外れ難くなり、この様な作用効果により、記録用紙P後端の通過をより一層正確に検出することが可能となる。
【0035】
加えて、本実施形態においては、レバー15を用紙搬送経路の下から上に突出する様に設けていることから、接触端15dは記録用紙Pのうら面と接触し、これにより、記録面にダメージを与えることがなく、特におもて面とうら面との両面にコート層を有する高画質記録用の記録用紙Pを用いて銀塩写真並の高画質記録を行う場合に良好な記録結果を得ることができる。
【0036】
尚、本実施形態ではレバー15を用紙搬送経路の下から上に突出する様に設けているが、逆に用紙搬送経路の上から下に突出する様に設けても、この様な記録面にダメージを与えないといった作用効果を得ることができることは言うまでもない。加えて、用紙搬送経路の上から下に突出する様に設けた場合に、記録用紙Pの後端が、本実施形態とは逆に下に反り返る様な状態となる場合には、接触面15eにより、接触端15dが記録用紙Pの後端から外れ難いといった作用効果を得ることもできる。
【図面の簡単な説明】
【図1】本発明に係るプリンタの装置本体の外観斜視図である。
【図2】本発明に係るプリンタの側断面概略図である。
【図3】紙検出器の側面図である。
【図4】レバーの動作を示す説明図である。
【符号の説明】
1 インクジェットプリンタ、2 給紙装置、7 付勢ばね、8 固定ガイド、9 可動ガイド、10 ホッパ、11 給送ローラ、12 紙戻しレバー、13摩擦分離材、14 アイドルローラ、15 レバー、15a 揺動軸、15b検出端、15c 掛止部、15d 接触端、15e 接触面、15f 当接面、16 検出部、17 紙検出器、18 紙案内部材、19 キャリッジモータ、20 搬送従動ローラホルダ、21 搬送駆動ローラ、22 搬送従動ローラ、23 ガイドローラ、24 キャリッジベルト、25 キャリッジ、26 記録ヘッド、27 キャリッジガイド軸、28 プラテン、28a 凹部、29 排出駆動ローラ、30 排出従動ローラ、31 廃液トレイ、34 廃液吸収材、36 インク吸収材、37 排出補助ローラ、P 記録用紙
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording medium passage detection lever that is swingably provided in a recording medium transport path of a recording apparatus that performs recording on a recording medium, and a recording apparatus including the lever. Further, the present invention relates to a liquid ejecting apparatus.
[0002]
Here, the liquid ejecting apparatus is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile that uses an ink jet recording head and discharges ink from the recording head to perform recording on a recording medium. And a device for ejecting a liquid corresponding to the intended use from a liquid ejecting head corresponding to the ink jet recording head to a medium to be ejected corresponding to a recording material and attaching the liquid to the ejecting medium. .
[0003]
As the liquid ejecting head, in addition to the recording head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED). Examples include an ejection head, a biological organic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.
[0004]
[Prior art]
2. Description of the Related Art In a recording apparatus typified by a facsimile, a printer, or the like, a paper passage detection unit for detecting the passage of a paper is provided at a predetermined position in a paper conveyance path for conveying a paper, and necessary paper feed control is performed. As a typical sheet passage detection unit, there is a unit including a lever that is swingably provided on a sheet conveyance path and a detection unit that detects a swing state of the lever. When the lever is disengaged from the sheet, the contact end that comes into contact with the sheet by the urging force of the urging means protrudes into the sheet conveyance path. When the lever is engaged with the sheet as the sheet passes, the lever swings and contacts. Retreats from the paper transport path. Some levers are provided so as to protrude downward from the upper side of the paper transport path, and others are provided so as to protrude upward from the lower side (for example, see Patent Document 1). One of the advantages of such a lever is that it comes into contact with the back side of the paper, that is, when a dedicated paper having a coating layer on the printing surface is used in a printer capable of performing high-quality printing comparable to, for example, a silver halide photograph. Another problem is that the coating layer is not damaged.
[0005]
[Patent Document 1]
JP-A-8-259037
[Problems to be solved by the invention]
By the way, in an ink jet printer, for example, a conveying roller for conveying a sheet to an ink jet recording head and a discharge roller for discharging a sheet on which recording has been performed give a curved posture such that the sheet is convex downward, thereby In some cases, the paper is prevented from floating from the platen so that the distance between the paper and the inkjet recording head is kept uniform. In such an ink jet printer, if a lever is provided on the upstream side of the conveyance roller so as to protrude upward from the lower side of the paper conveyance path, the rear end of the paper which is warped upward when the rear end of the paper passes therethrough. Due to the synergistic effect of the end and the lever that attempts to protrude into the paper transport path by the urging means, the lever is disengaged from the rear end of the paper even though the rear end of the paper does not pass, and the passage of the rear end of the paper is detected. Such a problem may occur.
The present invention has been made in view of such a problem, and an object of the present invention is to provide a paper passage detection lever capable of accurately detecting the passage of the rear end of a paper.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a recording medium transporting path in a recording apparatus that performs recording on a recording medium, and a biasing means in a non-engagement state with the recording medium. The contact end that comes into contact with the recording medium by receiving the urging force protrudes into the recording medium transport path, and when engaged with the recording medium, the contact end is swingably provided to retreat from the recording medium transport path. Recording medium passage detection lever, wherein the top of the contact end is provided with a flat portion so as to make surface contact with the front or back surface of the recording medium. .
[0008]
According to the first aspect, the recording medium passage detection lever (hereinafter, abbreviated as “lever”) has a top portion of a contact end that comes into contact with the recording medium and a front surface or a back surface of the recording medium. It is provided with a flat portion so as to make surface contact, so that it comes into surface contact with the recording medium, so that the state of the lever is stabilized, and when the rear end of the recording medium passes, the lever is placed at an inappropriate position. Does not come off the rear end of the recording medium, and the passage of the rear end of the recording medium can be accurately detected.
[0009]
According to a second aspect of the present invention, in the first aspect, the top portion is substantially in an inverted L-shape such that the top thereof is directed to the downstream side of the recording medium transport path when viewed from the side of the recording medium transport path. It is characterized by being formed in the shape of.
According to the second aspect, the top of the lever is formed in a substantially inverted L-shape such that it faces the downstream side of the recording medium transport path when the recording medium transport path is viewed from the side. The component of the force applied by the top of the lever to the recording medium is further directed in a direction orthogonal to the transport path of the recording medium, and the lever is less likely to come off when passing through the rear end of the recording medium. Passage can be detected accurately.
[0010]
According to a third aspect of the present invention, in the first or the second aspect, the flat portion is disposed with respect to a swing fulcrum of the recording medium passage detection lever in a non-engagement state with the recording medium. The recording medium is formed so as to be located on the downstream side in the transport direction of the recording medium.
According to the third aspect, in the non-engagement state with the recording medium, the flat portion is formed so as to be located on the downstream side in the transport direction of the recording medium with respect to the pivot of the lever. Therefore, when the lever swings by engaging with the recording medium, the swing angle can be minimized, and the installation space for the lever can be minimized.
[0011]
According to a fourth aspect of the present invention, there is provided a recording head that performs recording on a recording medium, a transport driving roller that is driven to rotate and transports the recording medium to the recording head, and is driven to rotate by pressing against the transport driving roller. A recording device comprising: a conveyance roller provided with a conveyance driven roller, wherein the recording medium passage detection lever according to any one of claims 1 to 3 is provided. And
According to the fourth aspect, since the recording apparatus includes the levers of the first to third aspects, it is possible to obtain the same operational effects as those of the first to third aspects.
[0012]
According to a fifth aspect of the present invention, in the above-mentioned fourth aspect, the rotation center of the transport driven roller that presses against the transport drive roller from above is arranged such that the rotation center of the recording medium transport path is in relation to the rotation center of the transport drive roller. The recording medium passage detection lever, which is arranged on the downstream side, is provided on the upstream side of the transport driving roller so as to protrude upward from below the recording medium transport path.
According to the fifth aspect, the rotation center of the transport driven roller that presses against the transport drive roller from above is located downstream with respect to the rotation center of the transport drive roller. Then, the recording medium is in a state of warping upward, and the lever is likely to come off from the rear end of the recording medium. However, due to the operation and effect of the first aspect described above, even in such a state, the lever can be moved backward from the recording medium. It is possible to accurately detect the passage of the rear end of the recording medium without easily coming off the end.
[0013]
According to a sixth aspect of the present invention, in the fourth or fifth aspect, the contact portion of the lever for detecting passage of the recording medium, which is in contact with the leading end of the recording medium, extends the recording medium transport path substantially vertically. It is characterized by being traversed.
According to the sixth aspect, the contact portion of the lever for detecting the passage of the recording medium that comes into contact with the leading end of the recording medium is formed so as to cross the recording medium transport path substantially vertically. Regardless of which part of the lever the tip of the medium contacts, it swings at almost the same timing, so that the passage of the tip of the recording medium can be accurately detected without causing a variation in the passage timing of the tip of the recording medium. .
[0014]
According to a seventh aspect of the present invention, there is provided a liquid ejecting head that ejects a liquid to a medium to be ejected, a transport driving roller that is driven to rotate and transports the medium to the liquid ejecting head, and a pressure roller that comes into contact with the transport driving roller. A transport roller configured to include a driven roller that is driven to rotate, and provided in a medium-to-be-ejected medium transport path, and in a non-engagement state with the medium to be ejected, receives the urging force of the urging means and contacts the medium to be ejected. A contact end protruding into the ejected medium transport path and engaging with the ejected medium, the ejected medium passage detection lever provided swingably so that the contact end retracts from the ejected medium transport path; A liquid ejecting apparatus, wherein a top portion of the contact end is provided with a flat portion so as to make surface contact with a front surface or a back surface of a medium to be ejected.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is an external perspective view of an apparatus main body of an ink-jet printer (hereinafter, referred to as a “printer”) 1 as an example of a “recording apparatus” and a “liquid ejecting apparatus” according to the present invention, and FIG. FIG. 3 is a side view of the paper detector, and FIG. 4 is an explanatory view showing the operation of the lever 15. In the following, the upstream side (the right side in FIG. 2) of the paper transport path is simply referred to as “upstream side”, and the downstream side (the left side in FIG. 2) of the paper transport path is simply referred to as “downstream side”.
[0016]
First, the configuration of the printer 1 will be outlined with reference to FIGS. The printer 1 is configured to have a small size suitable for recording on a recording paper P such as a postcard as an example of a “recording medium, a“ medium to be ejected ”or an L-size, and is suitable for A4 size recording. Similarly to a simple ink jet printer, a paper feeder 2 capable of setting a plurality of recording sheets P in an inclined posture at the rear of the apparatus, and a carriage 25 provided at the front of the apparatus so as to be able to reciprocate in the main scanning direction in the middle of the apparatus. Is provided with a stacker (not shown) for stacking recording paper P on which recording has been performed.
[0017]
The paper feeding device 2 includes a hopper 10, a movable guide 9, a fixed guide 8, a feed roller 11, a friction separating material 13, and a paper return lever 12. The hopper 10 is provided so as to be oscillated about a swing fulcrum 10a by a driving means (not shown), supports the recording paper P in an inclined posture, and records the recording paper P on a feed roller 11 when the recording paper P is fed. The paper P is pressed into contact. The fixed guide 8 and the movable guide 9 provided on the hopper 10 regulate the side end position of the recording paper P, and the movable guide 9 has a width of the recording paper P corresponding to each size of the recording paper P. It is slidably provided in the direction.
[0018]
The feed roller 11 has a substantially D-shape when viewed from the side, and a rubber material is wound around the outer periphery thereof. The feed roller 11 is selectively rotated and driven by a drive motor (not shown) when feeding paper. At the time of sheet feeding, the uppermost sheet of the recording sheet P pressed against the feeding roller 11 by the arc portion is fed to the downstream side, and when the sheet feeding is completed, the transport operation by the transport drive roller 21 on the downstream side is performed. At this time, the flat portion having a substantially D-shape in side view is controlled so as to face the friction separating member 13 so as not to generate a transport load. The roller denoted by reference numeral 14 is a freely rotatable idle roller, and is driven to rotate in contact with the recording paper P being transported so that the recording paper P being transported is not in contact with the feeding roller 11 to generate a transport load. . In the present embodiment, the idle rollers 14 are provided on both sides of the feed roller 11 so as to sandwich the feed roller 11.
[0019]
A friction separating member 13 is provided at a position facing the feed roller 11. The friction separating member 13 is pressed against the arc portion of the feed roller 11 at the time of sheet feeding to form a pressure contact, whereby the uppermost recording sheet P to be fed and the next sheet to be double fed are fed. The subsequent recording paper P is separated. A paper return lever 12 is provided at a position facing the feed roller 11. The paper return lever 12 is provided so as to be swingable about a swing fulcrum 12a. The paper return lever 12 is temporarily rotated so as to open the feeding path of the recording paper P from the standby state shown in FIG. The recording paper P, which is about to be multi-fed, is returned to the hopper 10 by falling down and rising again as shown in FIG.
[0020]
The sheet feeding device 2 is described above. On the downstream side of the sheet feeding device 2, a lever 15 as a “recording medium passage detection lever” and a detection unit 16 are provided between the feeding roller 11 and the conveyance driving roller 21. Is provided. The lever 15 is provided so as to be swingable about a swing shaft 15a, and an upper portion from the swing shaft 15a is configured as a “contact end” so as to be able to contact the fed recording paper P. The detection unit 16 is an optical sensor. When the lower part of the lever 15 from the swing shaft 15a enters the detection unit 16 as shown in the figure, the light from the light-emitting unit to the light-receiving unit is blocked. A passing state is detected. When the lever 15 swings with the passage of the recording sheet P, the lower portion of the lever 15 from the swing shaft 15a is disengaged from the detection unit 16, thereby detecting the passage of the leading end of the recording sheet P. I can do it. When the trailing edge of the recording sheet P passes, the lower end of the lever 15 enters the detecting unit 16 again, thereby making it possible to detect the passage of the trailing edge of the recording sheet P.
[0021]
Next, a transport drive roller 21 and a transport driven roller 22 are provided downstream of the paper detector 17 (hereinafter, the roller pair is appropriately referred to as a “transport roller”). The transport drive roller 21 is rotationally driven by a drive motor (not shown), and the transport driven roller 22 is pressed against the transport drive roller 21 and is driven to rotate. The transport drive roller 21 is formed by applying a coating film to the outer periphery of a metal rod that is long in the direction of the axis of the rotation axis. A plurality of transport driven rollers 22 are provided at predetermined intervals in the axial direction of the transport drive roller 21. Can be Then, the recording sheet P fed by the feeding roller 11 is nipped by the conveying roller and is conveyed to the recording head 26.
[0022]
At the downstream end of the transport driven roller holder 20 that supports the transport driven roller 22, a guide roller 23 that can freely rotate is provided. The guide roller 23 is a roller for preventing the recording paper P from rising from the platen 28, and thereby keeps the distance between the recording paper P and the recording head 14 constant.
[0023]
Next, a recording head 26 and a platen 28 are provided on the downstream side of the transport roller so as to face each other. The recording head 26 is provided at the bottom of the carriage 25, and performs recording by discharging (ejecting) an ink droplet as an example of a liquid toward the recording paper P. A carriage guide shaft 27 extending in the main scanning direction is inserted through the carriage 25, and is fixed to a part of an endless belt 24 (FIG. 1) extending in the main scanning direction. Then, receiving the power of the carriage motor 19 (FIG. 1), the carriage is reciprocated in the main scanning direction while being guided by the carriage guide shaft 27. In the present embodiment, the carriage 25 does not carry an ink cartridge, but instead moves from an ink cartridge (not shown) fixed to the bottom of the apparatus main body of the printer 1 to the recording head 26 via an ink tube (not shown). And ink are supplied.
[0024]
The platen 28 supports the recording paper P from below, thereby defining a gap between the recording paper P and the recording head 25. A concave portion 28a is formed on the surface facing the recording head 25. This is for printing without margins on the recording paper P, and when ejecting ink droplets to the edge of the recording paper P, the ink droplets are also ejected to a portion off the edge of the recording paper P, Then, by throwing it away into the concave portion 28a, so-called borderless printing is performed. Note that an ink absorbing material 36 (FIG. 1) that absorbs ink droplets is provided in the concave portion 28a.
The ink droplets discarded in the concave portion 28a are discharged from a discharge hole (not shown) to a lower portion, and a lower portion of the platen 28 is provided with a waste liquid tray 31 for receiving the discharged ink droplets. A waste liquid absorbing material 34 is provided inside the waste liquid tray 31 to reliably hold the ink waste liquid in the waste liquid tray 31.
[0025]
Subsequently, a discharge drive roller 29 and a discharge driven roller 30 are provided downstream of the recording head 26 (hereinafter, the roller pair is referred to as a “discharge roller” as appropriate). The discharge drive roller 29 is driven to rotate by a drive motor (not shown), and the discharge driven roller 30 rotates in contact with the discharge drive roller 29. Then, the recording sheet P on which recording has been performed is discharged toward a stacker (not shown) by being nipped by these rollers.
[0026]
A discharge auxiliary roller 37 is provided downstream of the discharge drive roller 29. The discharge assist roller 37 rotates according to the rotation of the discharge drive roller 29 by a belt 38 that is engaged with the rotation shaft 37 a and the rotation shaft 29 a of the discharge drive roller 29. The discharge auxiliary roller 37 has a function of reliably dropping the trailing end of the recording sheet P discharged by being nipped by the discharge driving roller 29 and the discharge driven roller 30 toward the stacker.
[0027]
By the way, the transport roller and the discharge roller are configured to keep the distance between the recording sheet P and the recording head 26 constant by pressing the recording sheet P toward the platen 28. That is, the transport roller is configured such that the rotation axis of the transport driven roller 22 that presses against the transport drive roller 21 from above is positioned downstream with respect to the rotation axis of the transport drive roller 21, and the discharge roller Is configured such that the rotation axis of the discharge driven roller 30 that contacts the discharge drive roller 29 from above is located upstream with respect to the rotation axis of the discharge drive roller 29. Accordingly, the recording paper P is thereby provided with a curved posture between the conveyance roller and the discharge roller so as to be slightly convex downward, is pressed against the platen 28, and maintains a constant distance from the recording head 26. Dripping.
[0028]
Next, the lever 15 constituting the paper detector 17 will be described in detail with reference to FIGS. The lever 15 is attached to the paper guide member 18 by pivotally supporting a swing shaft 15a of the lever 15 on a paper guide member 18 (FIG. 2) provided below the paper transport path. 3, the lever 15 includes an upper contact end 15d from the swing shaft 15a, a lower detection end 15b from the swing shaft 15a, and a hook 15c for hooking the tension coil spring 7. . The detection end 15b extends substantially straight downward from the swing shaft 15a when the lever 15 is not engaged with the recording paper P, and the lower end of the detection end 15b enters the detection unit 16 as the lever 15 swings, or It comes off from the part 16.
[0029]
The hook 15c has a hook shape. One end of the tension coil spring 7 is hooked to the hook (not shown) so that the other end of the coil spring 7 holds the lever 15 in the upright posture as shown in FIG. I do. In such an upright posture, the contact end 15d moves the paper transport path substantially vertically from the lower side to the upper side of the transport path of the recording sheet P (hereinafter referred to as “paper transport path”) as shown in FIG. It becomes a state protruding so as to cross.
[0030]
The contact end 15d has a contact surface 15f with which the leading end of the recording paper P contacts, and a contact surface (flat surface) 15e with which the back surface of the recording paper P contacts, and has a substantially inverted L-shape as shown. It is formed like this. Here, in FIG. 3 (solid line) showing a state where the contact end 15d is not engaged with the recording paper P, the contact end 15d does not extend straight upward from the swing shaft 15a but once extends obliquely upward toward the downstream side. Later, it is formed so as to form a substantially inverted L-shape by extending substantially straight upward and bending its tip toward the downstream side. That is, the contact surface 15e is formed so as to be located on the downstream side with respect to the swing shaft 15a in a state where the contact surface 15e is not engaged with the recording paper P.
[0031]
The operation and effect of the lever 15 configured as described above will be described with reference to FIG. FIG. 4A shows the moment when the sheet P comes into contact with the contact surface 15f. As shown in the drawing, the contact surface 15f is provided so as to cross the sheet conveyance path substantially vertically. Therefore, even if the leading end of the recording sheet P abuts on any part of the contact surface 15f, the lever 15 is not moved. It swings at almost the same timing, so that the passage timing of the leading edge of the recording sheet P does not vary, and the passage of the recording sheet P can be accurately detected.
[0032]
Subsequently, as the recording paper P further advances downstream, the lever 15 swings about the swing shaft 15a as shown in FIG. 4B, and the contact end 15d retreats from the paper transport path. Here, as described above, since the contact end 15d is formed such that the contact surface 15e is located on the downstream side with respect to the swing shaft 15a, the swing angle of the lever 15 can be suppressed to a small value. This can contribute to space saving. That is, as shown by the imaginary line and the symbol A in FIG. 4A, if the contact surface 15e is formed to extend from almost directly above the swing shaft 15a to the downstream side, FIG. As is clear from FIG. 4, the swing angle when engaging with the recording paper P and swinging increases, whereby the lever 15 swings further counterclockwise by a predetermined angle from the state shown in FIG. Will do. Then, since the opposite detection end 15b further projects to the right in FIG. 4, more space on the right side of the lever 15 in FIG. 4 is required. However, since the swing angle of the lever 15 is kept small as described above, it is possible to contribute to space saving.
[0033]
Next, as shown in FIG. 4C, when the rear end of the recording paper P has reached the vicinity of the upstream side of the transport roller, the rotation axis of the transport driven roller 22 is Since the recording paper P is located downstream from the rotation axis, the rear end of the recording paper P is warped upward. The contact end 15d comes into contact with the rear end of the recording sheet P in such a state from below, and a force F that lifts the rear end of the recording sheet P upward by the urging force of the tension coil spring 7 is applied to the rear end of the recording sheet P. Because of the application, the contact end 15d is easily detached from the rear end of the recording paper P. However, since the top of the contact end 15d is formed by the contact surface 15e formed of a flat surface, the surface of the lever 15 is stabilized by making surface contact with the recording paper P, and when the rear end of the recording paper P passes. In addition, the contact end 15d does not come off at an inappropriate position, and the passage of the rear end of the recording sheet P can be accurately detected.
[0034]
Further, since the top of the contact end 15d is formed in a substantially inverted L-shape such that the tip is directed to the downstream side, the force component (the force indicated by the symbol F) applied to the recording paper P is further increased. It is directed in a direction perpendicular to the transport path, whereby the contact end 15d is more difficult to come off from the trailing edge of the recording sheet P. With such an effect, the passage of the trailing edge of the recording sheet P can be detected more accurately. It becomes.
[0035]
In addition, in the present embodiment, since the lever 15 is provided so as to protrude upward from below the paper transport path, the contact end 15d contacts the back surface of the recording paper P, and thereby Good recording results without causing damage, especially when performing high-quality recording comparable to silver halide photography using recording paper P for high-quality recording having a coating layer on both the front and back surfaces. Can be obtained.
[0036]
In the present embodiment, the lever 15 is provided so as to protrude upward from below the paper transport path. Conversely, the lever 15 may be provided so as to protrude downward from above the paper transport path. It goes without saying that the effect of not damaging can be obtained. In addition, when the recording paper P is provided so as to protrude downward from the top of the paper transport path, and the rear end of the recording paper P warps downward contrary to the present embodiment, the contact surface 15e Accordingly, it is possible to obtain an operation effect such that the contact end 15d is unlikely to come off the rear end of the recording paper P.
[Brief description of the drawings]
FIG. 1 is an external perspective view of an apparatus main body of a printer according to the present invention.
FIG. 2 is a schematic side sectional view of the printer according to the present invention.
FIG. 3 is a side view of the paper detector.
FIG. 4 is an explanatory diagram showing an operation of a lever.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 inkjet printer, 2 paper feeder, 7 biasing spring, 8 fixed guide, 9 movable guide, 10 hopper, 11 feed roller, 12 paper return lever, 13 frictional separation material, 14 idle roller, 15 lever, 15a swing Shaft, 15b detection end, 15c hook, 15d contact end, 15e contact surface, 15f contact surface, 16 detector, 17 paper detector, 18 paper guide member, 19 carriage motor, 20 transport driven roller holder, 21 transport Drive roller, 22 conveyance driven roller, 23 guide roller, 24 carriage belt, 25 carriage, 26 recording head, 27 carriage guide shaft, 28 platen, 28a recess, 29 discharge drive roller, 30 discharge driven roller, 31 waste liquid tray, 34 waste liquid Absorbing material, 36 ink absorbing material, 37 discharge auxiliary roller, P recording paper

Claims (7)

  1. 被記録媒体に記録を行う記録装置における被記録媒体搬送経路に設けられるとともに、被記録媒体との非係合状態では付勢手段の付勢力を受けて被記録媒体と接触する接触端が被記録媒体搬送経路に突出し、被記録媒体と係合すると、前記接触端が被記録媒体搬送経路から退避する様に揺動可能に設けられる被記録媒体通過検出用レバーであって、
    前記接触端の頂部が、被記録媒体のおもて面又はうら面と面接触する様に平坦部を備えて成されている、
    ことを特徴とする被記録媒体通過検出用レバー。
    A contact end that is provided on a recording medium transport path in a recording apparatus that performs recording on the recording medium and that comes into contact with the recording medium by receiving the urging force of the urging means in a non-engagement state with the recording medium. A recording medium passage detection lever provided to be swingable so as to protrude into the medium conveyance path and engage with the recording medium when the contact end is retracted from the recording medium conveyance path;
    The top of the contact end is provided with a flat portion so as to make surface contact with the front or back surface of the recording medium,
    A lever for detecting passage of a recording medium.
  2. 請求項1において、前記頂部が、被記録媒体搬送経路を側視して、その先端が被記録媒体搬送経路の下流側を向く様な略逆L字形の形状に形成されている、
    ことを特徴とする被記録媒体通過検出用レバー。
    2. The recording medium according to claim 1, wherein the top is formed in a substantially inverted L-shape such that a front end thereof is directed to a downstream side of the recording medium transport path when viewing the recording medium transport path.
    A lever for detecting passage of a recording medium.
  3. 請求項1または2において、前記平坦部が、被記録媒体との非係合状態において、当該被記録媒体通過検出用レバーの揺動支点に対して被記録媒体の搬送方向下流側に位置する様に形成されている、
    ことを特徴とする被記録媒体通過検出用レバー。
    3. The recording medium according to claim 1, wherein the flat portion is located on a downstream side in a conveyance direction of the recording medium with respect to a swing fulcrum of the recording medium passage detection lever in a non-engagement state with the recording medium. Formed in the
    A lever for detecting passage of a recording medium.
  4. 被記録媒体に記録を行う記録ヘッドと、
    前記記録ヘッドへ被記録媒体を搬送する、回転駆動される搬送駆動ローラ及び当該搬送駆動ローラに圧接して従動回転する搬送従動ローラを備えて構成された搬送ローラと、を有する記録装置であって、
    請求項1から3のいずれか1項に記載された前記被記録媒体通過検出用レバーを備えている、
    ことを特徴とする記録装置。
    A recording head that performs recording on a recording medium,
    A recording apparatus comprising: a transport drive roller that transports a recording medium to the recording head; a transport drive roller that is driven to rotate; and a transport roller that includes a transport driven roller that is pressed against the transport drive roller and driven to rotate. ,
    4. A recording medium passage detection lever according to claim 1, further comprising:
    A recording device characterized by the above-mentioned.
  5. 請求項4において、前記搬送駆動ローラに上から圧接する前記搬送従動ローラの回転中心が、前記搬送駆動ローラの回転中心に対して被記録媒体搬送経路の下流側に配置され、
    前記被記録媒体通過検出用レバーが、前記搬送駆動ローラの上流側において、被記録媒体搬送経路の下側から上側に突出する様に設けられている、
    ことを特徴とする記録装置。
    The rotation center of the conveyance driven roller that presses the conveyance drive roller from above according to claim 4, wherein the rotation center of the conveyance driven roller is disposed downstream of the recording medium conveyance path with respect to the rotation center of the conveyance drive roller,
    The recording medium passage detection lever is provided so as to protrude upward from the lower side of the recording medium transport path on the upstream side of the transport driving roller,
    A recording device characterized by the above-mentioned.
  6. 請求項4または5において、前記被記録媒体通過検出用レバーにおいて被記録媒体先端と当接する当接部が、被記録媒体搬送経路を略垂直に横切る様に成されている、
    ことを特徴とする記録装置。
    6. The recording medium passage detection lever according to claim 4, wherein a contact portion of the lever for detecting passage of the recording medium, which abuts on a leading end of the recording medium, crosses the recording medium transport path substantially vertically.
    A recording device characterized by the above-mentioned.
  7. 被噴射媒体に液体噴射を行う液体噴射ヘッドと、
    前記液体噴射ヘッドへ被噴射媒体を搬送する、回転駆動される搬送駆動ローラ及び当該搬送駆動ローラに圧接して従動回転する搬送従動ローラを備えて構成された搬送ローラと、
    被噴射媒体搬送経路に設けられるとともに、被噴射媒体との非係合状態では付勢手段の付勢力を受けて被噴射媒体と接触する接触端が被噴射媒体搬送経路に突出し、被噴射媒体と係合すると、前記接触端が被噴射媒体搬送経路から退避する様に揺動可能に設けられる被噴射媒体通過検出用レバーと、を有する液体噴射装置であって、
    前記接触端の頂部が、被噴射媒体のおもて面又はうら面と面接触する様に平坦部を備えて成されている、
    ことを特徴とする液体噴射装置。
    A liquid ejection head that performs liquid ejection on a medium to be ejected,
    Conveying the medium to be ejected to the liquid ejecting head, a transport roller configured to include a transport driving roller that is driven to rotate and a transport driven roller that is driven to rotate in pressure contact with the transport driving roller,
    Along with being provided in the medium to be ejected, the contact end that comes into contact with the medium to be ejected by receiving the urging force of the urging means in the non-engagement state with the medium to be ejected protrudes into the medium conveyance path to be ejected. A liquid ejecting apparatus, comprising: a lever for detecting passage of a medium to be ejected, which is swingably provided such that, when engaged, the contact end is retracted from the conveyance path of the medium to be ejected,
    The top of the contact end is provided with a flat portion so as to make surface contact with the front or back surface of the medium to be ejected,
    A liquid ejecting apparatus characterized by the above-mentioned.
JP2003150413A 2003-05-28 2003-05-28 Recording device Expired - Fee Related JP4292384B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006273486A (en) * 2005-03-29 2006-10-12 Seiko Epson Corp Recorded medium detecting device, recording device and liquid injecting device
CN103448384A (en) * 2012-06-04 2013-12-18 精工爱普生株式会社 Recording device and detection structure thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006273486A (en) * 2005-03-29 2006-10-12 Seiko Epson Corp Recorded medium detecting device, recording device and liquid injecting device
JP4640584B2 (en) * 2005-03-29 2011-03-02 セイコーエプソン株式会社 Recording medium detection device and recording device
CN103448384A (en) * 2012-06-04 2013-12-18 精工爱普生株式会社 Recording device and detection structure thereof

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