JP4319448B2

JP4319448B2 - Image forming apparatus

Info

Publication number: JP4319448B2
Application number: JP2003113245A
Authority: JP
Inventors: 洋石井; 裕輔野口; 数修久間; 真木倉; 豊福地; 一喜鈴木; 智彦佐々木
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2003-04-17
Filing date: 2003-04-17
Publication date: 2009-08-26
Anticipated expiration: 2023-04-17
Also published as: CN101349881A; CN101349881B; JP2004317883A

Description

【０００１】
【産業上の利用分野】
本発明は、カラープリンタ、カラー複写機、カラーファクシミリやそれらの複合機等の画像形成装置に関する。
【０００２】
【従来技術】
用紙やフィルム等の記録材にカラー画像を形成する電子写真方式の画像形成装置が知られている。カラー画像形成装置では、一般に４色の現像剤としてのトナーを用いてカラー画像を形成するため、モノクロ専用の画像形成装置に比べて構成部品が多く大型化し易とともに、単位時間当たりに排出できる枚数、すなわちカラープリント時の速度も低くなる。画像形成装置は、パーソナルコンピュータの普及に伴い、パーソナルコンピュータと接続して所謂プリンタとして用いられる場合も増えてパーソナル化が進んでおり、利便性の観点から装置利用者であるユーザーの近くに設置されることが多い。このため、ユーザーの作業性を考慮すると、装置の高さは低く、設置スペースを考えると装置幅が狭いなど小型であるのが望ましい。また、画像形成装置のパーソナル化やメンテナンスコストの削減という観点から、現像剤となるトナー等の消耗品の交換やメンテナンスをユーザー自身が実施するようになりつつある。
【０００３】
カラー画像形成装置において、プリント速度の高速化を図る場合、１つ感光体の周囲に複数色の現像装置を設け、各現像装置で現像されたトナー像を、感光体を現像装置の数だけ回転させて感光体上でカラー画像を合成して記録材に転写する周知の１ドラム方式よりも、１列に配置された複数の感光体に対して複数の現像装置をそれぞれ近接配置してそれぞれで単色のトナー像を形成し、各トナー像を順次転写して記録材にカラー画像を転写するタンデム方式の画像形成装置の方が有利である。タンデム方式の画像形成装置では、一般にトナー消費量が多くなるので、補給用トナーを現像装置に供給する現像剤供給部を、現像装置と一体化してカートリッジ化するよりも、現像装置と個別に設けた方が作業性の点では好ましい。また、装置の設置スペースを小さくするには、装置本体が小さいだけでなく、装置本体から突出する部材がない方が望まく、装置本体の上部をプリントされた記録材（以下「プリント物」と記す）の積載部とすることが考えられる。
【０００４】
これらタンデム方式で装置本体の上部を積載部とし、現像剤供給部が現像装置と別体に設けられた画像形成装置として特許文献１が挙げられる。また、タンデム方式の装置の設置面積を低減するには、特許文献２に記載の画像形成装置のように、装置本体の上部を積載部とするとともに、１列に並んでいる感光体、現像装置や中間転写ベルトを特許文献１のように水平に配置するのではなく、斜めに配置することで低減することができる。また、積載部でのプリント物のスタック性を考慮すると、特許文献３に記載の画像形成装置のように、積載面を傾斜して形成することが考えられる。
【０００５】
【特許文献１】
特開２００２−３６２８０７号公報
【特許文献２】
特開２００２−２１４８６８号公報
【特許文献３】
特開２００３−５０３５１号公報
【０００６】
【発明が解決しようとする課題】
各特許文献では、様々な課題が解決されているが、装置に対する各種操作性の向上が求められている。これは、画像形成装置がコンパクトになって設置スペースが少なくなっても、例えば消耗品であるトナーが収納された現像剤収納部材と記録材を収納するカセットに対する着脱方向が異なっていると、異なる方向へ各種部材を操作しなければならず、装置構成に不慣れなユーザー自らが交換作業をする場合煩雑である。また、各種部材を異なる方向に操作する構成であると、作業スペースが様々な方向に対して必要となるが、画像形成装置を設置する環境に空間的制約がある場合、何がしかの構成部材に対する作業空間が制約を受けてしまう。例えば、給紙カセットと現像剤収納部材とが異なる方向へ操作する構成の場合、操作頻度の高い給紙カセットへの操作が空間的制限を受けないように装置を設置すると、現像剤収納部材の作業スペースが制約されてしまい、この作業を行うためには、装置を制約空間から移動しなければならず面倒である。
【０００７】
また、カラー画像形成装置の場合、現像剤収納部材はトナーの色の数だけ必要になるので、視認性を考慮すると特許文献１に示すように並列に配置して装置の上部に配置するのが望ましい。しかし、幾ら複数の現像剤収納部材を装置の上部に並列配置した場合でも、各現像剤収納部材の着脱方向によって見辛くなる。例えば着脱方向が制約空間であれば、装置を移動しなければならないし、装置の上部を開閉可能とした場合でも、特許文献３のように、複数の現像剤収納部材を操作部に対して遠近する方向に並列配置して場合、手前側の収納部によって奥側の収納部が隠れて見えない場合や、開閉した装置の部材の開閉方向によっては、その開閉した部材によって隠れてしまうこともある。さらに、最初の一枚目が積載部へ排出されるまでの時間であるファーストプリント時間を早めつつも、小型化を図るために積載部を装置の上方に設けると、排出口が積載部よりも上方に位置するため、現像剤収納部材を排出部越しに見ることも現像剤収納部材を見辛くしている要因である。
【０００８】
本発明は、装置に対する操作性や交換部品に対する交換作業がし易い画像形成装置を提供することを目的とする。
本発明は、装置に対する操作性や交換部品に対する交換作業がし易く、装置の高さや設置面積を抑制しつつ排出される記録材の大量積載が可能な画像形成装置を提供することを目的とする。
【０００９】
【課題を解決するための手段】
上記目的を達成するため、本発明にかかる、像担持体を備えた複数の作像手段を有する作像部で形成されたトナー像を記録材に定着手段で定着し、定着後の記録材を作像部が配設される装置本体の上部に形成された積載部に、装置操作側に配置した排出部から排出する画像形成装置では、積載部よりも下方の装置本体内で排出部に対して遠近する方向に並列されて各作像手段に現像剤を補給する複数の現像剤収納部材を有していて、各現像剤収納部材を、装置本体に対して着脱可能とするとともに排出部から排出される記録材の排出方向と同一平面において直交する装置本体幅の範囲の上方空間内で着脱操作を可能とした。このため、現像剤収納部材の交換作業を、装置本体幅の範囲の上方空間内で行える。
【００１０】
各現像剤収納部材を、排出部に最近接する現像剤収納部材から排出部よりも最遠方に位置する現像剤収納部材に向かうに従い高くなるように配設すると、並列配置されている現像剤収納部材を装置操作側から見た場合に、現像剤収納部材が上下にずれて配置されることになり、手前の現像剤収納部材により奥側の現像剤収納部材の隠される範囲が少なくなる。この隠れる範囲は、手前に配置した現像剤収納部材とその奥側に配置した現像剤収納部材との上下方向へのずれを大きくすることで調整することができる。
【００１１】
現像剤収納部材が装置本体の幅の範囲にないで着脱自在な装置において、積載部を、装置本体に対して開閉自在とし、その開閉中心部を排出部から最遠方に位置する現像剤収納部材よりも遠方の装置本体に設けると、積載部を開放した際に開閉中心側に位置する現像剤収納部材の隠れる範囲が少なくなる。積載部の開閉中心部は、最遠方に位置する現像剤収納部材の最上部よりも低い位置に配設すると、積載部の高さを抑えられるので好ましい。回転中心部は、装置本体の幅方向にその軸線が位置するように装置本体側に設けられた軸部と、積載部に設けられ軸部に支持される軸受部で構成すると、積載部を装置本体の上下方向に開閉自在とすることができる。開閉中心部を排出部から最遠方に位置する現像剤収納部材よりも遠方の装置本体に設けると、積載部の開閉方向が排出部に対して遠近する方向となるので、積載部を開閉する際の操作性が良いと共に、開放した際にその下方に位置する現像剤収納部材の視認性も良い。
【００１２】
装置操作側に位置する装置本体の外装に操作パネルが配置される場合、積載部を、操作パネルが配置された外装よりも上方まで開放可能とすると、装置操作側から現像剤収納部材への視認性がよくなる。積載部の最上位が、操作パネルが配置された外装の最上位と同じ高さとすると、装置の高さを抑えられるとともに、装置全体に一体感を与えられてコンパクトに見えるとともに、さまざまなコストの点で有利となる。すなわち、画像形成装置を配送する場合、発泡スチロールやダンボールなどで製品形状に沿うように形成された緩衝材を梱包箱の中に入れて配送するが、操作パネルが配置された外装の最上位と同じ高さとすると装置の出っ張りが少なくなるので、緩衝材を特別な形状で形成しなくて済み、汎用性を持たせられるため、配送や梱包コストが低くなる。
【００１３】
上記の画像形成装置において、積載部の最下位の位置を、現像剤収納部材のうちの最下位に存在する現像剤収納部材の最上部より低くすると、装置の高さを抑えつつ排出部に近い積載部と排出部との間隔を広くでき、積載枚数を増やすことができる。
【００１４】
トナー画像が定着される記録材を収納する給紙カセットを装置本体に対して出し入れ自在に設け、積載部への開閉操作と給紙カセットへの出し入れ操作を、装置本体幅の範囲内で行われるようにすると、装置本体の幅方向に障害物が存在している場合でも、装置の位置を移動することなく積載部への開閉操作と給紙カセットへの出し入れ操作を行える。装置本体に対する給紙カセットの出し入れ方向を排出部に対して遠近する方向とすると、装置操作側から積載部への開閉操作と給紙カセットへの出し入れ操作を行えるようになる。
【００１５】
トナー画像が定着される記録材を載置するトレイを、装置本体に対して開閉自在に設け、積載部への開閉操作とトレイへの開閉操作を装置本体幅の範囲内で行えるようにすると、装置本体の幅方向に障害物が存在している場合でも、装置の位置を移動することなく積載部及びトレイへの開閉操作を行える。装置本体に対するトレイの開閉方向を排出部に対して遠近する方向とすると、装置操作側から積載部への開閉操作と給紙カセットへの出し入れ操作を行えるようになる。
【００１６】
積載部を、現像剤収納部材材を覆う装置本体の外装で構成すると、部品点数を増大することなく積載部が形成されるとともに、装置の外装に排出部側が低くなる傾斜面が形成されるので、装置外観が小さく見える。
【００１７】
積載部が、排出部の下方に位置する端部から排出部から離れる方向に延びるとともに、その積載面よりも上方に突出した複数のリブを有する場合、積載面に積載される記録材の下部と積載面との間に空間が形成される。このため、積載されて記録材をユーザーが手で取る際に、この空間に指を入れられるので取り易くなる。
【００１８】
複数のリブを、積載面における端部側の中心部から略放射状に配置すると、排出部と対向する側に位置する側において、リブの間隔が引くなり、積載されて記録材をユーザーが手で取る際に、積載面と積載された記録材の下部との間に形成される空間内へ指が入れ易くなるのでより記録材が取り易くなる。
【００１９】
リブは、基本的には２本以上であれば積載された記録材と積載面との間に空間を形成できるが、積載された枚数が多くなると、その重さで記録材が撓んで空間が狭くなる場合があるので、記録材の両側と中央部を下方から支えること考慮すると３本以上が好ましい。ただし、あまりにリブの本数が多くなると、リブの間隔が狭くなって空間内に指が入れにくくなるので、３〜４本が適当である。
【００２０】
載置部の積載面に、排出部から排出される記録材の排出方向と同一平面内で直交する方向に、上方に向かって突出するに複数の湾曲面を形成すると、積載面に排出された記録材は複数の湾曲部の上に積載されるので、積載された記録材の下部と湾曲部がない積載面との間に空間が形成される。このため、積載されて記録材をユーザーが手で取る際に、この空間に指を入れられるので、取り易くなる。
【００２１】
載置部の積載面を、現像剤収納部材と略同一方向に傾斜して形成したり、現像剤収納部材の配設方向と略同一方向に複数の作像手段を傾斜して配設し、これら作像手段と同一方向に傾斜して形成すると、装置本体における無駄なスペースの発生を抑えられる。
【００２２】
作像部で形成された画像が転写される中間転写体や各像担持体に光書込みを行う光書込み部を、現像剤収納部材の配設方向と略同一方向に傾斜して配設し、載置部の積載面を、これら中間転写体や光書込み部と同一方向に傾斜して形成する場合でも装置本体における無駄なスペースの発生を抑えられる。
【００２３】
【発明の実施の形態】
図面を用いて本発明の実施の形態を説明する。本形態において、画像形成装置は、タンデム方式を採用してフルカラー画像を形成可能なカラープリンタ（以下「プリンタ」と記す）である。画像形成装置としては、図１に示すプリンタに限らず、複写機、ファクシミリ装置などてあってもよい。
【００２４】
図２を用いてプリンタとしての基本構成とその動作について説明し、この後に本形態特有の構成と作用について説明する。このプリンタは、装置本体１の下部に記録材としての用紙Ｐが収納される給紙カセット４５を配設された給紙部２が配設され、その上方に画像形成部３を配置した構成となっている。画像形成部３には、像担持体を備えた複数の作像手段として４個の作像ユニット８Ｙ，８Ｃ，８Ｍ，８ＢＫを備えた作像部８と、複数のローラ４，５，６に巻き掛けられた可撓性を有する無端ベルトにより構成された中間転写体としての中間転写ベルト７と、各像担持体に光書込みを行う光書込み部としての光書き込みユニット１５と、用紙Ｐにトナー像を定着する定着手段２２とが設けられている。給紙部２から定着手段１１までの間には、用紙Ｐを搬送する搬送経路Ｒが形成されている。ローラ６は搬送経路Ｒに臨んで配置されている。
【００２５】
中間転写ベルト７のローラ４とローラ５間は、このベルトの下部側ベルト走行辺に相当している。中間転写ベルト７には、ローラ６と対向する部位に２次転写装置となる２次転写ローラ２０が搬送経路Ｒに臨むように配設され、ローラ４と対向する部位にベルト表面を清掃するベルトクリーニング装置２１が配設されている。
【００２６】
作像部３は、この下側走行辺に対向するように配置されることで、中間転写ベルト７の下方に配設されている。各作像ユニットは、中問転写ベルト７に接する像担持体としての感光体ドラム１０をそれぞれ具備している。各感光体ドラム１０の周りには、帯電装置１１、現像装置１２、クリーニング装置１３がそれぞれ配置されている。各感光体ドラム１０が中間転写ベルト７に接する位置における中間転写ベルト７の内側には、１次転写を行う転写装置としての転写ローラ１４がそれぞれ設けられている。本実施形態において、作像ユニット８Ｙ，８Ｃ，８Ｍ，８ＢＫは、基本的には同一構造で構成されており、図１では代表して作像ユニット８ＢＫの構成にのみ符号を付している。各作像ユニットにおいて、異なるのは各現像装置１２に収納されている現像剤としてのトナーの色が異なる点にある。作像ユニット８Ｙ，８Ｃ，８Ｍ，８ＢＫの各現像装置１２には、それぞれイエロー，シアン，マゼンタ、ブラックのトナーが収納されている。
【００２７】
光書き込みユニット１５は、光変調されたレーザ光Ｌを各感光体ドラムの表面に照射して、感光体表面に色毎の潜像を形成するものであり、本形態では、作像部８の下方に配置されている。
【００２８】
画像形成動作が開始されると、各作像ユニット８の感光体ドラム１０が図示しない駆動装置によって時計方向に回転駆動され、各感光体ドラムの表面が帯電装置１１によって所定の極性に一様に帯電される。帯電された各感光体ドラムの表面には、光書き込みユニット１５からレーザ光Ｌがそれぞれ照射されて、それぞれの表面に静電潜像が形成される。このとき、各感光体ドラムに露光する画像情報は所望のフルカラー画像をイエロー、シアン、マゼンタ及びブラックの色情報に分解した単色の画像情報である。このように形成された静電潜像は、各感光体と現像装置１２の間を通るとき、各現像装置１２のトナーによってトナー像として可視像化される。
【００２９】
中間転写ベルト７が巻きかけられた複数のローラ４，５，６のうち１つのローラが図示していない駆動装置によって反時計方向に回転駆動され、これにより中間転写ベルト７が矢印で示す反時計周り方向に走行駆動され、他のローラが従動回転する。このように走行する中間転写ベルト７には、イエローのトナーを有する現像装置１２を具備する作像ユニット８Ｙで形成されたイエロートナー像が転写ローラ１４によって転写される。その転写されたイエロートナー像には、作像ユニット８Ｃ，８Ｍ及び８ＢＫで形成されたシアントナー像、さらにマゼンタトナー像及びブラックトナー像が転写ローラ１４によって順次重ね転写され、かくして中問転写ベルト７はその表面にフルカラーのトナー像を担持する。
【００３０】
トナー像が転写された後の各感光体ドラム表面に付着する残留トナーは、各クリーニング装置１３によって感光体ドラム表面から除去され、次いでその表面が図示していない除電装置によって除電作用を受け、その表面電位が初期化されて次の画像形成に備えられる。
【００３１】
一方、給紙部２から給紙される用紙Ｐは、搬送経路Ｒに送り込まれ、２次転写ローラ２０よりも給紙側に配設されたレジストローラ対２１によって給紙タイミングを計られて、ローラ６と２次転写ローラ２０との対向部に給送される。そして、このとき２次転写ローラ２０には、中問転写ベルト表面のトナー像のトナー帯電極性と逆極性の転写電圧が印加され、これによって中間転写ベルト７の表面のトナー像が用紙Ｐ上に一括して転写される。トナー像を転写された用紙Ｐは、定着手段２２へと搬送され、定着手段２２を通過する際に熱と圧が加えられてトナー像が熔融されて定着される。トナー像が定着されたプリント物Ｐ１は、搬送経路Ｒの終端に位置し、装置本体１の上部寄りに設けられた排出部２３へと搬送され、装置本体１の上部に構成される積載部３６へと排出される。トナー像を用紙Ｐに転写した後の中間転写ベルト７は、このベルトに残留したトナーがクリーニング装置２１より除去される。
【００３２】
このように構成されたプリンタは、４個の作像ユニット８Ｙ，８Ｍ，８Ｃ及び８ＢＫを中間転写ベルト７に対向して設け、中間転写ベルト７に順次各色のトナー像を重ね転写するため、作像手段が１つで４色の現像装置を持ち、中間転写ベルト上にトナー像を重ね転写し、その後用紙に転写する形式のものと比べて作像時間を大幅に短縮することができる。また、装置本体１の上部に積載部３６が構成されているので、装置本体１から積載部３６が周囲に飛び出ることがなく、設置面積や占有面積が小さくなる。
【００３３】
以上の説明は、用紙Ｐ上にフルカラー画像を形成するときの画像形成動作であるが、作像部８の作像ユニットのいずれか１つを使用して単色画像を形成したり、２色又は３色の画像を形成したりすることもできる。また、本形態のプリンタを用いてモノクロ印刷をする場合には、作像ユニット８ＢＫの感光体ドラム１０上にのみ静電潜像を形成して同ユニットによって現像して用紙Ｐに転写し、定着手段２２で定着すればよい。
【００３４】
次に本形態の特徴的な構成について説明する。
プリント物Ｐ１を装置本体１の上部に形成された積載部３６に排出する排出部２３は、装置本体１の右方側の上部に形成されている。装置本体１の外装、すなわち、排出部２３の上方に位置していて排出部２３を覆う外装１Ａには、プリンタの操作パネル６０と用紙Ｐを載置するトレイ４６が装置本体１の正面となる右方側から操作できるように配設されている。本形態において、プリンタは排出部２３が配置されている装置本体１の右方が装置操作側となる。
【００３５】
積載部３６よりも下方となる装置本体１の内部には、仕切板５０が設けられている。この仕切板５０は積載部３６と中間転写ベルト７の上側辺との間に配置されていて、装置本体１内に現像剤収納部材の収納空間部５１を形成している。収納空間部５１内には、複数の現像剤収納部材としてのトナー収納容器３７，３８，３９，４０が積載部３６よりも下方で、矢印Ｃ１，Ｃ２で示す排出部２３に対して遠近する方向に並列されている。矢印Ｃ１は、排出部２３から遠ざかる方向であり、排出部２３から排出される用紙Ｐの排出方向（以下「排出方向Ｃ１」と記す）でもある。矢印Ｃ２は、排出部２３に近づく方向である。トナー収納容器３７，３８，３９，４０内には、それぞれイエロー，シアン，マゼンタ，ブラックのトナーが収納されている。トナー収納容器３７，３８，３９，４０は、作像ユニット８Ｙ，８Ｃ，８Ｍ，８ＢＫの各現像装置１２と図示しないトナー補給路を介して連結されていて、各現像装置１２内のトナーが減少すると、補給用トナーが対応する現像装置に供給されるように構成されている。
【００３６】
トナー収納容器３７，３８，３９，４０は、排出部２３に最近接するトナー収納容器３７から排出部２３から最遠方に位置するトナー収納容器４０に向かうに従い高くなるように配設されている。本形態では、トナー収納容器３７からトナー収納容器４０に向かうに従い徐々に高くなるように傾斜させて現像剤空間部５１内に配置される。排出部２３は、トナー収納容器３７よりも上方であり、トナー収納容器４０と略同じ高さに配設されている。
【００３７】
収納空間部５１内には、トナー収納容器３７，３８，３９，４０を着脱自在に保持するホルダー５２が配設されている。ホルダー５２は、トナー収納容器３７，３８，３９，４０をそれぞれ上方に向かって引き上げることで、各トナー収納容器を排出方向Ｃ１と同一平面内で直行する装置本体の幅（以下「装置本体幅Ｄ１」と記す）の範囲の上方空間内で着脱操作ができるように構成されている。トナー収納容器３７，３８，３９，４０は、このホルダー５２に装着されることで装置本体１内での位置決めが成される。すなわち、トナー収納容器３７，３８，３９，４０は装置本体１に対して着脱可能に設けられている。
【００３８】
積載部３６は、排出部２３の下方から排出方向Ｃ１に向かって装置本体１に形成されていて、収納空間部５１内に収納されている各トナー収納容器を覆うように、装置本体の外装１Ｄで構成されている。積載部３６は、装置本体１に対して開閉自在であり、その開閉中心部４１がトナー収納容器４０よりも遠方の装置本体１Ｅに設けられている。開閉中心部４１は、トナー収納容器４０の最上部４０Ａよりも低い位置に配設されている。この回転中心部４１は、図１，図３に示すように、排出方向Ｃ１と同一平面内で直交する矢印Ｄで示す装置の幅方向（以下「幅方向Ｄ」と記す）にその軸線が位置するように装置本体１側に設けられた軸部４２と、積載部３６の端部３６Ｂ側に設けられ、軸部４２に支持される軸受部４３とを備えている。このため、外装１Ｄで構成された積載部３６は、その開閉方向が、装置操作側に対して進退する方向、すなわち、矢印Ｃ１，Ｃ２で示す排出部２３に対して遠近する方向となる。この積載部３６は、操作パネル６０が配置された外装１Ａよりも上方まで開放可能とされている。
【００３９】
積載部３６の面積は、給紙部２から給紙可能な用紙サイズよりも幾分大きく形成されている。積載部３６は、排出部２３側に位置するその端部３６Ａが、排出部２３から遠い側に位置する端部３６Ｂよりも低くなるように傾斜して形成されている。積載部３６の最下部となる端部３６Ａは、排出部２３の排紙点より低い位置となるように配置され、積載部３６の最上部となる端部３６Ｂが、図４にも示すように、外装１Ａの最上部１Ｃの位置と略同じ高さとされている。排紙点とは、装置の上下方向に配置して互いに対向して接触する排紙ローラ対２３Ａのニップ部に対する水平線Ｏと積載部３６側に面する外装面１Ｂの交点を指す。積載部３６の端部３６Ａは、トナー収納容器３７の最上部３７Ａより低い位置に配設されている。
【００４０】
このように、トナー収納容器３７，３８，３９，４０を、装置本体１に対して着脱可能とし、かつ装置本体幅Ｄ１の範囲の上方空間内で着脱操作が可能であるので、トナー収納容器３７，３８，３９，４０の交換作業を装置本体幅Ｄ１の範囲の上方空間内で行え、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００４１】
トナー収納容器３７からトナー収納容器４０に向かうに従い高くなるように配設すると、並列配置されているトナー収納容器３７，３８，３９，４０を装置操作側（排出部２３側）から見た場合に、各トナー収納容器が上下にずれて配置されることになる。このため、排出口２３の陰になることもなく、装置操作側から各トナー収納容器に対する視認性が良くなり、装置に対する操作性や交換部品に対する交換作業がし易くなる。また、トナー収納容器３７，３８，３９，４０を、トナー収納容器３７からトナー収納容器４０に向かうに従い高くなるように配設することは、逆に見ると、トナー収納容器３７がトナー収納容器４０よりも低くなる。このため、排出部２３側に位置する積載部３６の端部が、排出部２３側に位置する端部３６Ｂよりも低くなるように積載面３６を形成することができ、排出部２３の位置を変更することなく、積載部３６と排出部２３との間隔を広げることができ、装置の高さを高くすることなく、積載部３６に積載できる用紙枚数を増大することができる。
【００４２】
積載部３６は、トナー収納容器４０よりも排出部２３から遠い装置本体１Ｅに設けた開閉中心部４１により装置本体１に対して開閉自在とされるので、積載部３６を開放した際に開閉中心部４１側に位置するトナー収納容器４０の隠れる範囲が少なくなるとともに、積載部３６の開閉方向が排出部に対して遠近する方向となる。このため、積載部３６を開閉する際の操作性が良いと共に、装置操作側から各トナー収納容器に対する視認性が良くなり、装置に対する操作性や交換部品に対する交換作業がよりし易くなる。開閉中心部４１は、トナー収納容器４０の最上部４０Ａよりも低い位置に配設して、積載部３６の高さを抑えているので、装置の高さを抑えながらも装置操作側から各トナー収納容器に対する視認性を確保でき、装置に対する操作性や交換部品に対する交換作業がより一層し易くなる。
【００４３】
積載部３６は、操作パネル６０が配置された外装１Ａよりも上方まで開放可能に構成されているので、装置操作側から各トナー収納容器への視認性がよくなり、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００４４】
排出部３６が、トナー収納容器３７よりも上方でトナー収納容器４０と略同じ高さに配設されているので、装置の高さを抑えつつも、トナー収納容器３７の上方側に位置する積載部３６の部位となる端部３６Ａと排出部２３との間隔を稼げるので、装置の高さを高くすることなく、積載部３６に積載できる用紙枚数を増大することができる。すなわち、積載部３６の最下部となる端部３６Ａが排出部２３の排紙点より低い位置となるように形成したので、排紙点と積載部３６の端部３６Ａとの間隔を稼ぐことができ、排紙点と積載部３６の端部３６Ａとの間隔Ｈを稼げるので、装置の高さを高くすることなく、積載部３６に積載できる用紙枚数を増大することができる。
【００４５】
積載部３６の端部３６Ｂを、外装１Ａの最上部１Ｃと略同じ高さとしているので、装置の高さの範囲内において、排出部２３と積載部３６との間隔を稼ぐことができ、積載部３６に積載できる用紙枚数を増大することができる。端部３６Ａをトナー収納容器３７の最上部３７Ａより低い位置に設けているので、排出部３６の位置を変更することなく、端部３６Ａ（排紙点）と排出部２３の間隔をより広げることができ、積載部３６に積載できる用紙枚数を増大することができる。
【００４６】
積載部３６を外装１Ｄで構成すると、部品点数を増大することなく装置本体１に積載部３６を形成できるとともに、装置外装に、排出部２３側が低くなる傾斜面が形成されるので、装置外観を容積的にも視覚的に小さくなる。
【００４７】
次に給紙カセット４５とトレイ４６について説明する。
給紙カセット４５は、装置本体１に対して出し入れ自在となるように、装置本体１に対して摺動可能に支持されている。給紙カセット４５の出し入れ方向は、矢印Ｃ１，Ｃ２で示す排出部２３に対して遠近する方向と同一方向とされている。このため、積載部３６への開閉操作と給紙カセット４５への出し入れ操作が、装置本体幅Ｄ１の範囲内で行われるので、装置本体１の幅方向Ｄに障害物が存在している場合でも、装置の位置を移動することなく積載部３６への開閉操作と給紙カセット４５への出し入れ操作を行える。また、本形態では、装置本体１に対する給紙カセット４５の出し入れ方向を排出部に対して遠近する方向となる矢印Ｃ１，Ｃ２としているので、積載部３６への開閉操作と給紙カセット４５への出し入れ操作を装置操作側から行えるので、装置に対する操作性や交換部品に対する交換作業がより一層し易くなる。
【００４８】
トレイ４６は、その下部が外装１Ａに軸４４で回動自在に支持されることで、装置本体１に対して開閉自在に設けられている。軸４４は、幅方向Ｄにその軸線が配置されていて、トレイ４６を外装１Ａに収納する起立位置と、この起立位置から矢印Ｃ１方向に回転して外装１Ａから装置操作側に突出した使用位置へと開閉自在に支持している。すなわち、装置本体１に対するトトレイ４６の開閉方向は、排出部に対して遠近する方向とされている。
【００４９】
このため、積載部３６への開閉操作とトレイ４６への開閉操作が、装置本体幅Ｄ１の範囲内で行われるので、装置本体１の幅方向Ｄに障害物が存在している場合でも、装置の位置を移動することなく積載部３６への開閉操作とトレイ４６への出し入れ操作を行える。また、本形態では、装置本体１に対するトレイ４６の開閉方向を排出部に対して遠近する方向となる矢印Ｃ１，Ｃ２としているので、積載部３６への開閉操作とトレイ４６への出し入れ操作を装置操作側から行え、装置に対する操作性や交換部品に対する交換作業がより一層し易くなる。
【００５０】
また、本形態において、外装１Ａは、図２、図３に示すように、装置操作側となる装置本体１の右側の下部に設けた軸部４７によって、装置本体１に対して開閉自在に設けられている。この軸部１７も幅方向Ｄにその軸線が位置するように設けられていて、外装１Ａの開閉方向をトレイ４６同様、排出部に対して遠近する方向となる矢印Ｃ１，Ｃ２としている。このため、トレイ４６への出し入れ操作や積載部３６への開閉操作と共に、装置操作側からその開閉操作を行え、装置に対する操作性や交換部品に対する交換作業がより一層し易くなる。
【００５１】
積載部３６には、図４，図５に示すように、端部３６Ａから排出部２３より離れる方向に延びる複数のリブ７１，７２，７３を有している。リブ７１，７２，７３は、載置面３６Ｃにおける端部３６Ａ側の中心部３６Ｄから略放射状で配置されている。リブ７１，７２，７３は、幅方向Ｄに間隔７４，７５を空けて配置されている。リブ７１，７２，７３は、積載部３６の端部３６Ａ側から積載部３６の略中央部までの範囲に配設されている。リブ７１，７２，７３は、図１、図６に示すように、積載面３６Ｃよりも上方に突出して形成されている。本形態において、リブ７１，７２，７３は、積載部３６を構成する外装１Ｄと一体成型されているが、外装１Ｄに対して後付けする形態であっても良い。本形態において、これらリブは、排紙方向Ｃ１に対する長さが積載面３６Ｃの略半分程度になるように排出部２３から排出されるプリント物Ｐ１に対応するためのものである。
【００５２】
このように積載面３６Ｃから上方に突出するリブ７１，７２，７３が積載部３６に形成されていると、図５に示すように各リブの上に積載されるプリント物Ｐ１の下部Ｐ２と積載面３６Ｃとの間に空間Ｓ１，Ｓ２が形成される。このため、積載されて用紙Ｐをユーザーが手で取る際に、この空間に指を入れられるので取り易くなる。また、リブ７１，７２，７３を載置面３６Ｃにおける端部３６Ａ側の中心部３６Ｄから略放射状に配置すると、図５に示すように、排出部２３と対向する側に位置する端部３６Ｂにおいて、間隔７４，７５が広くなるので、積載されたプリント物Ｐ１をユーザーが手で取る際に、積載面３６Ｃとリブ上のプリント物の下部Ｐ２との間に形成される空間Ｓ１，Ｓ２内へ指がより入れ易くなるので、積載されたプリント物Ｐ１が取り易くなる。さらに、リブは幅方向Ｄに３本、間隔７４，７５を空けて配置されているので、積載される用紙枚数が多い場合でも、リブ上においてプリント物Ｐ１がその重さによって撓むのを抑制できる。このため、大量のプリント物Ｐ１が積載された場合でも、積載面３６Ｃとリブ上のプリント物Ｐ１の下部Ｐ２との間に形成される空間Ｓ１，Ｓ２を確保でき、大量に積載されたプリント物Ｐ１をユーザーが取る場合でも取り易くなる。
【００５３】
本形態の積載部３６には、更に工夫が成されている。それは、図４,図５に示すように、載置部３６の端部３６Ｂ側から中央部にかけて、載置面３６Ｃから上方に向かってその中央部が突出する複数の湾曲面８０，８１が形成されている。この湾曲面８０，８１は、幅方向Ｄに連続形成されていて、中央部よりも低くなる両者の境界部８３が載置面３６Ｃの幅方向Ｄにおける中央に位置するように形成されている。この湾曲面８０，８１は、端部３６Ｂ側では幅方向Ｄに対する幅が広く、排出部２３に向かう従いその幅が狭くなる平面形状が三角形状を成している。これら湾曲面８０，８１の先端部８０Ａ，８１Ａは、載置面３６Ｃの幅方向Ｄにおける中心部に配置されているリブ７２の両端まで延びている。本形態において、これら湾曲面８０，８１は、排紙方向Ｃ１に対する長さが積載面３６Ｃの端部３６Ｂまでになるように排出部２３から排出されるプリント物Ｐ１に対応するためのものである。各リブが横排紙に対応するものに対し、湾曲面８０，８１は、縦排紙に対応するものとなる。
【００５４】
このように積載面３６Ｃから上方に突出する湾曲面８０，８１が積載部３６の端部３６Ｂから中央部にかけて形成されていると、図７に示すように、積載面３６Ｃに排出されたプリント物Ｐ１が湾曲部８０，８１の上に積載される。このため、プリント物Ｐ１の下部Ｐ２と、湾曲部８０，８１が低くなる境界部８３近傍の載置面３６Ｃとの間に空間Ｓ３が形成されるので、ユーザーが端部３６Ｂ側からプリント物Ｐ１を手で取る際に、この空間Ｓ３に指を入れられるので取り易くなる。湾曲面８０，８１は、２つに限定されるものではなく、用紙Ｐのサイズやコシなどを考慮して適宜、その個数を決めるのが好ましい。ただし、あまりに多くの湾曲面とすると、ユーザーの指が入らなくなるので、少なくともユーザーの指が挿入できる空間８３が形成される数が適当である。
【００５５】
本形態では、さらに特有の構成を備えている。それは、中間転写ベルト６、作像部８及び光書き込みユニット１５を、トナー収納部材３７〜４０の傾斜方向と同方向に傾斜させて装置本体１内に配設していると共に、積載部３６（積載面３６Ｃ）も同方向に傾斜させている点にある。このように、トナー収納容器３７〜４０だけでなく、これに倣うように、装置本体１に配設される構成部材も同方向に傾斜させることで、これら中間転写ベルト６、作像部８及び光書き込みユニット１５を水平に配置する構成に比べて、排出部２３の下方を装置本体１内に下げ易くなるので、装置の高さを上昇させることなく、排出部２３と端部３６Ａ側との間隔を広くできるとともに、積載部３６の傾斜角も容易に増やすことができ、スタック性を容易に向上することができる。積載部３６、トナー収納容器３７〜４０、中間転写ベルト６、作像部８及び光書き込みユニット１５を傾斜させているので、これらの構成を水平に配設する場合よりも、図１において、排紙方向に対する長さとなる装置の前後方向への長さを短くでき、設置面積や占有面積が小さくなる。
【００５６】
【発明の効果】
本発明によれば、積載部よりも下方の装置本体内で排出部に対して遠近する方向に並列されて各作像手段に現像剤を補給する複数の現像剤収納部材を、装置本体に対して着脱可能とするとともに排出部から排出される記録材の排出方向と同一平面において直交する装置本体幅の範囲の上方空間内で着脱操作を可能としたので、現像剤収納部材の交換作業を装置本体幅の範囲の上方空間内で行え、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００５７】
本発明によれば、各現像剤収納部材を、排出部に最近接する現像剤収納部材から排出部よりも最遠方に位置する現像剤収納部材に向かうに従い高くなるように配設したので、並列配置されている現像剤収納部材を装置操作側から見た場合に、現像剤収納部材が上下にずれて配置されることになり、装置操作側から各現像剤収納部材に対する視認性が良くなり、より装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００５８】
本発明によれば、積載部を、装置本体に対して開閉自在とし、その開閉中心部を排出部から最遠方に位置する現像剤収納部材よりも遠方の装置本体に設けることで、積載部を開放した際に開閉中心側に位置する現像剤収納部材の隠れる範囲が少なくなり、装置操作側から各現像剤収納部材に対する視認性が良くなり、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００５９】
本発明によれば、積載部の開閉中心部を、最遠方に位置する現像剤収納部材の最上部よりも低い位置に配設すると、積載部の高さを抑えられるので、装置の高さを抑えながらも装置操作側から各現像剤収納部材に対する視認性を確保でき、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００６０】
本発明によれば、開閉中心部を排出部から最遠方に位置する現像剤収納部材よりも遠方の装置本体に設けることで、積載部の開閉方向が排出部に対して遠近する方向となるので、積載部を開閉する際の操作性が良いと共に、開放した際にその下方に位置する現像剤収納部材の視認性がよくなり、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００６１】
本発明によれば、積載部を、操作パネルが配置された外装よりも上方まで開放可能とすると、装置操作側から現像剤収納部材への視認性がよくなるので、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００６２】
本発明によれば、記録材を収納する給紙カセットを装置本体に対して出し入れ自在に設け、積載部への開閉操作と給紙カセットへの出し入れ操作を、装置本体幅の範囲内で行われるようにしたので、装置本体の幅方向に障害物が存在する場合でも、装置の位置を移動することなく積載部への開閉操作と給紙カセットへの出し入れ操作を装置幅内で行え、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００６３】
本発明によれば、装置本体に対する給紙カセットの出し入れ方向を排出部に対して遠近する方向とすることで、装置操作側から積載部への開閉操作と給紙カセットへの出し入れ操作を行えるようになり、より装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００６４】
本発明によれば、記録材を載置するトレイを、装置本体に対して開閉自在に設け、積載部への開閉操作とトレイへの開閉操作を装置本体幅の範囲内で行えるようにすると、装置本体の幅方向に障害物が存在している場合でも、装置の位置を移動することなく積載部及びトレイへの開閉操作を行え、装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００６５】
本発明によれば、装置本体に対するトレイの開閉方向を排出部に対して遠近する方向とすることで、装置操作側から積載部への開閉操作と給紙カセットへの出し入れ操作を行えるようになり、より装置に対する操作性や交換部品に対する交換作業がし易くなる。
【００６６】
本発明によれば、積載部の最上部を、操作パネルが配置された外装の最上部と略同じ高さとしているので、装置の高さの範囲内において、排出部と積載部との間隔を稼ぐことができ、装置に対する操作性や交換部品に対する交換作業がし易くしなが、装置の高さや設置面積を抑制しつつ排出される記録材を大量積載することができる。また、装置が平面的になるので、画像形成装置を配送する際に用いる緩衝材を特別な形状で形成しなくて済み、配送や梱包コストを抑制することができる。
【００６７】
本発明によれば、積載部の最下部を、最下位に位置する現像剤収納部材の最上部より低い位置に設けるので、排出部の位置を変更することなく積載面と排出部との間隔をより広げることができ、装置に対する操作性や交換部品に対する交換作業がし易くしなが、装置の高さや設置面積を抑制しつつ排出される記録材を大量積載することができる。
【００６８】
本発明によれば、現像剤収納部材を覆う装置本体の外装で積載部を構成することで、部品点数を増大することなく積載部を形成できると共に、装置の外装に排出部側が低くなる傾斜面が形成されるので、装置外観を容積的にも視覚的に小さくすることができる。
【００６９】
本発明によれば、積載部に設けた、排出部の下方に位置する端部から排出部から離れる方向に延び、積載面よりも上方に突出した複数のリブにより、積載面に積載される記録材の下部と積載面との間に空間が形成されるので、積載されている記録材をユーザーが手で取る際に、この空間に指を入れられるので取り易くなる。また、複数のリブを、載置面における端部側の中心部から略放射状に配置することで、排出部と対向する側において、リブの間隔が広くなり、積載されて記録材をユーザーが手で取る際に、積載面と積載された記録材の下部との間に形成される空間内へ指が入れ易くなるので、より記録材が取り易くなる。
【００７０】
本発明によれば、積載面に排出された記録材が、積載部の載置面の排出部から排出される記録材の排出方向と同一平面内で直交する方向に、上方に向かって突出して形成された複数の湾曲面の上に積載されるので、積載された記録材の下部と湾曲部がない積載面との間に空間が形成される。このため、積載されて記録材をユーザーが手で取る際に、この空間に指を入れられるので取り易くなる。
【００７１】
本発明によれば、積載部の載置面だけでなく、複数の作像手段を有する作像部、作像部で形成された画像が転写される中間転写体、作像手段のそれぞれの像担持体に光書込みを行う光書込み部等も、現像剤収納部材の配設方向と略同一方向に傾斜して配置することで、これら構成部材を水平に配置する構成に比べて、排出部の下方を装置本体内に下げ易くなるとともに、装置の前後方向への長さが短くなる。このため、装置の高さを上昇させることなく、排出部と積載部との間隔を広げられて、装置の高さや設置面積を抑制しつつ排出される記録材を大量積載することができるとともに、積載部の傾斜角も容易に増やせ、スタック性を容易に向上することができる。また、装置の前後方向への長さが短くなるので、設置面積や占有面積を小さくすることができる。
【図面の簡単な説明】
【図１】本発明にかかる画像形成装置の概略構成を示す側面図である。
【図２】本発明にかかる画像形成装置を装置前方側から見た時の外観を示す斜視図である。
【図３】積載部と装置本体の外装が開放された状態を装置前方側から見た時の外観を示す斜視図である。
【図４】本発明にかかる画像形成装置を装置後方側から見た時の外観を示す斜視図である。
【図５】図４に示す画像形成装置の平面図である。
【図６】積載部に設けられた複数のリブの構成とその作用を説明するための拡大図である。
【図７】積載部に設けられた複数の湾曲面とその作用を説明するための拡大図である。
【符号の説明】
１装置本体
１Ａ外装
１Ｂ外装の最上部
１Ｄ現像剤収納部材を覆う装置本体の外装
１Ｅ遠方の装置本体
７中間転写体
８作像部
８Ｙ，８Ｃ，８Ｍ，８ＢＫ複数の作像手段
１０像担持体
１５光書込み部
２２定着手段
２３排出部
３６積載部
３６Ａ積載部の最下部（排出部の下方に位置する端部）
３６Ｂ積載部の最上部
３６Ｃ積載面
３６Ｄ端部側の中心部
３７最近接する現像剤収納部材
３７Ａ現像剤収納部材の最上部
３７，３８，３９，４０複数の現像剤収納部材
４０最遠方に位置する現像剤収納部材
４０Ａ現像剤収納部材の最上部
４１開閉中心部
６０操作パネル
７１，７２，７３複数のリブ
８０，８１複数の湾曲面
Ａ排出部の排紙点
Ｃ１，Ｃ２遠近する方向（進退する方向）
Ｃ１排紙方向
Ｄ排出方向と直交する方向
Ｄ１装置本体幅
Ｐ記録材
４２軸部
４３軸受部
４５給紙カセット
４６トレイ[0001]
[Industrial application fields]
The present invention relates to an image forming apparatus such as a color printer, a color copying machine, a color facsimile, or a complex machine thereof.
[0002]
[Prior art]
An electrophotographic image forming apparatus that forms a color image on a recording material such as paper or film is known. Since color image forming apparatuses generally form color images using toner as a developer of four colors, the number of components can be increased easily and the number of sheets that can be discharged per unit time as compared with monochrome image forming apparatuses. That is, the speed during color printing is also reduced. With the widespread use of personal computers, image forming apparatuses are increasingly used as so-called printers connected to personal computers, and are being personalized. From the viewpoint of convenience, image forming apparatuses are installed near users who are apparatus users. Often. For this reason, considering the workability of the user, the height of the apparatus is low, and considering the installation space, it is desirable that the apparatus is small, such as a narrow apparatus width. Further, from the viewpoint of personalization of the image forming apparatus and reduction of maintenance costs, the user himself / herself is performing replacement and maintenance of consumables such as toner as a developer.
[0003]
In a color image forming apparatus, when the printing speed is increased, a developing device of a plurality of colors is provided around one photosensitive member, and the toner image developed by each developing device is rotated by the number of the developing devices. Rather than the well-known one-drum system in which a color image is synthesized on a photoconductor and transferred to a recording material, a plurality of developing devices are arranged close to each of a plurality of photoconductors arranged in a row. A tandem image forming apparatus that forms a single color toner image, sequentially transfers each toner image, and transfers a color image onto a recording material is more advantageous. In a tandem image forming apparatus, the amount of toner consumed generally increases. Therefore, a developer supply unit that supplies replenishment toner to the developing device is provided separately from the developing device rather than being integrated with the developing device as a cartridge. Is preferable in terms of workability. In addition, in order to reduce the installation space of the apparatus, it is desirable that not only the apparatus main body is small, but also that there is no member protruding from the apparatus main body. It is conceivable to use a loading section.
[0004]
Patent Document 1 is an example of an image forming apparatus in which the upper part of the apparatus main body is a stacking unit and the developer supply unit is provided separately from the developing device. Further, in order to reduce the installation area of the tandem apparatus, as in the image forming apparatus described in Patent Document 2, the upper portion of the apparatus main body is used as a stacking unit, and the photosensitive member and the developing apparatus are arranged in a line. Alternatively, the intermediate transfer belt can be reduced by arranging it diagonally instead of horizontally as in Patent Document 1. In consideration of stackability of printed matter in the stacking unit, it is conceivable that the stacking surface is formed to be inclined as in the image forming apparatus described in Patent Document 3.
[0005]
[Patent Document 1]
JP 2002-362807 A
[Patent Document 2]
JP 2002-214868 A
[Patent Document 3]
JP 2003-50351 A
[0006]
[Problems to be solved by the invention]
In each patent document, various problems are solved, but improvement in various operability for the apparatus is required. This is different even if the image forming apparatus is compact and installation space is reduced, for example, when the mounting direction of the developer storage member storing the toner as a consumable and the cassette storing the recording material are different. Various members must be operated in the direction, and it is complicated when a user who is unfamiliar with the device configuration performs the replacement work. In addition, when the configuration is such that various members are operated in different directions, a work space is required in various directions. However, if there are spatial restrictions in the environment in which the image forming apparatus is installed, there are some components. The work space for is limited. For example, in the case of a configuration in which the paper feed cassette and the developer storage member are operated in different directions, if the apparatus is installed so that the operation to the paper feed cassette having a high operation frequency is not subjected to a spatial restriction, the developer storage member The work space is constrained, and in order to perform this work, the apparatus must be moved from the constrained space.
[0007]
Further, in the case of a color image forming apparatus, as many developer storage members as the number of toner colors are required. Therefore, in consideration of visibility, it is necessary to arrange them in parallel as shown in Patent Document 1 and arrange them at the top of the apparatus. desirable. However, even when a plurality of developer accommodating members are arranged in parallel in the upper part of the apparatus, it becomes difficult to see depending on the attaching / detaching direction of each developer accommodating member. For example, if the attachment / detachment direction is a constrained space, the apparatus must be moved, and even when the upper part of the apparatus can be opened and closed, a plurality of developer storage members are located near and far from the operation unit as in Patent Document 3. If the storage unit on the back side is hidden by the storage unit on the front side and cannot be seen, or depending on the opening / closing direction of the member of the opened / closed device, it may be hidden by the opened / closed member. . Furthermore, if the stacking unit is provided above the device to reduce the size while shortening the first print time, which is the time until the first first sheet is discharged to the stacking unit, the discharge port will be more than the stacking unit. Since it is located above, viewing the developer accommodating member over the discharge portion is also a factor that makes it difficult to see the developer accommodating member.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus in which operability with respect to the apparatus and replacement work for replacement parts are easy.
SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus in which the operability of an apparatus and replacement work for replacement parts are easy, and a large amount of recording materials can be stacked while suppressing the height and installation area of the apparatus. .
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a toner image formed by an image forming section having a plurality of image forming means having an image carrier according to the present invention is fixed to a recording material by a fixing means, and the recording material after fixing is fixed. In an image forming apparatus that discharges from a discharge section disposed on the apparatus operation side to a stacking section formed on the upper part of the apparatus main body on which the image forming section is disposed, the image forming apparatus is disposed on the discharge section within the apparatus main body below the stacking section. And a plurality of developer storage members that replenish the developer to each image forming means, and each developer storage member can be attached to and detached from the apparatus main body and can be removed from the discharge section. The attachment / detachment operation can be performed in the upper space within the range of the apparatus main body width in the same plane as the discharge direction of the recording material to be discharged. Therefore, the developer storage member can be replaced in the upper space within the range of the apparatus main body width.
[0010]
When each developer storage member is disposed so as to increase from the developer storage member closest to the discharge portion toward the developer storage member located farthest from the discharge portion, the developer storage members arranged in parallel are arranged. When viewed from the apparatus operation side, the developer storage member is displaced up and down, and the range in which the developer storage member on the back side is hidden by the front developer storage member is reduced. This hidden range can be adjusted by increasing the vertical displacement between the developer accommodating member disposed in front and the developer accommodating member disposed on the back side.
[0011]
In a detachable apparatus where the developer accommodating member is not within the width of the apparatus main body, the stacking portion can be opened and closed with respect to the apparatus main body, and the developer accommodating member whose center of opening and closing is located farthest from the discharge portion If it is provided in the apparatus body farther away, the range in which the developer storage member located on the opening / closing center side is hidden when the stacking portion is opened is reduced. It is preferable that the opening / closing center portion of the loading portion is disposed at a position lower than the uppermost portion of the developer storage member located at the farthest position because the height of the loading portion can be suppressed. If the rotation center part is composed of a shaft part provided on the apparatus main body side so that its axis is positioned in the width direction of the apparatus main body, and a bearing part provided in the loading part and supported by the shaft part, It can be opened and closed freely in the vertical direction of the main body. If the opening / closing center part is provided in the apparatus main body farther from the developer storage member located farthest from the discharge part, the opening / closing direction of the stacking part is Direction to the discharge part Therefore, the operability when opening and closing the stacking portion is good, and the visibility of the developer storage member positioned below the stacking portion when opened is also good.
[0012]
When the operation panel is arranged on the exterior of the apparatus main body located on the apparatus operation side, if the stacking portion can be opened up above the exterior on which the operation panel is disposed, the visual recognition from the apparatus operation side to the developer storage member is possible. Sexuality is improved. If the top of the loading unit is the same height as the top of the exterior where the operation panel is placed, the height of the device can be reduced, and the entire device can be given a sense of unity, making it appear compact, and with various costs. This is advantageous. In other words, when delivering an image forming apparatus, a cushioning material formed so as to conform to the product shape with foamed polystyrene or cardboard is placed in a packaging box for delivery, but it is the same as the topmost exterior of the operation panel. If the height is set, the protrusion of the device is reduced, so that the cushioning material need not be formed in a special shape, and versatility can be provided, so that delivery and packing costs are reduced.
[0013]
In the above-described image forming apparatus, when the lowest position of the stacking unit is lower than the uppermost part of the developer storage member existing at the lowest of the developer storage members, the height of the apparatus is suppressed and the vicinity of the discharge unit is reduced. The interval between the stacking section and the discharge section can be widened, and the number of stacked sheets can be increased.
[0014]
A paper feed cassette for storing the recording material on which the toner image is fixed is provided in the apparatus main body so that it can be freely inserted into and removed from the apparatus main body. In this way, even when an obstacle exists in the width direction of the apparatus main body, the opening / closing operation to the stacking unit and the loading / unloading operation to the sheet feeding cassette can be performed without moving the position of the apparatus. The direction of loading and unloading the paper cassette relative to the main unit Direction to the discharge part Then, the opening / closing operation to the stacking unit and the loading / unloading operation to / from the sheet feeding cassette can be performed from the apparatus operating side.
[0015]
When the tray on which the recording material on which the toner image is fixed is provided is openable and closable with respect to the apparatus main body, the opening and closing operation to the stacking unit and the opening and closing operation to the tray can be performed within the range of the apparatus main body width. Even when an obstacle exists in the width direction of the apparatus main body, the opening / closing operation to the stacking unit and the tray can be performed without moving the position of the apparatus. The tray opening / closing direction with respect to the main unit Direction to the discharge part Then, the opening / closing operation to the stacking unit and the loading / unloading operation to / from the sheet feeding cassette can be performed from the apparatus operating side.
[0016]
If the stacking unit is configured by the exterior of the apparatus main body covering the developer storage member material, the stacking unit is formed without increasing the number of parts, and an inclined surface is formed on the exterior of the apparatus to lower the discharge unit side. The appearance of the device looks small.
[0017]
When the stacking portion has a plurality of ribs extending in a direction away from the discharge portion from an end portion located below the discharge portion and protruding upward from the stacking surface, a lower portion of the recording material loaded on the stacking surface; A space is formed between the loading surface. For this reason, when the recording material is stacked and the user picks up the hand by hand, the finger can be put into this space, so that it becomes easy to pick it up.
[0018]
When a plurality of ribs are arranged substantially radially from the central portion on the end side of the stacking surface, the ribs are spaced apart on the side facing the discharge unit, and the recording material is stacked by the user by hand. When picking up, it becomes easier to pick up the recording material because it is easy to put a finger into the space formed between the loading surface and the lower portion of the stacked recording material.
[0019]
Basically, if there are two or more ribs, a space can be formed between the loaded recording material and the loading surface. However, if the number of loaded sheets increases, the recording material bends due to its weight and the space is reduced. Since it may become narrower, it is preferable to use three or more in consideration of supporting both sides and the center of the recording material from below. However, if the number of ribs is too large, the interval between the ribs becomes narrow and it becomes difficult to put a finger in the space, so 3 to 4 ribs are appropriate.
[0020]
When a plurality of curved surfaces are formed on the stacking surface of the mounting unit so as to protrude upward in a direction orthogonal to the discharge direction of the recording material discharged from the discharge unit, the sheet is discharged onto the stacking surface. Since the recording material is loaded on the plurality of curved portions, a space is formed between the lower portion of the loaded recording material and the loading surface without the curved portion. For this reason, the user can put his / her finger in this space when the recording material is loaded and the user manually picks up the recording material.
[0021]
The stacking surface of the mounting portion is formed so as to be inclined in substantially the same direction as the developer storage member, or a plurality of image forming means are provided in an inclined direction substantially in the same direction as the developer storage member. If it is formed to be inclined in the same direction as these image forming means, generation of useless space in the apparatus main body can be suppressed.
[0022]
An intermediate transfer member to which an image formed by the image forming unit is transferred and an optical writing unit that performs optical writing on each image carrier are disposed so as to be inclined substantially in the same direction as the developer storage member. Even when the stacking surface of the mounting portion is formed to be inclined in the same direction as those of the intermediate transfer member and the optical writing portion, it is possible to suppress generation of useless space in the apparatus main body.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. In this embodiment, the image forming apparatus is a color printer (hereinafter referred to as “printer”) that can form a full-color image by employing a tandem method. The image forming apparatus is not limited to the printer shown in FIG. 1, but may be a copying machine, a facsimile machine, or the like.
[0024]
The basic configuration and operation of the printer will be described with reference to FIG. 2, and the configuration and operation unique to this embodiment will be described thereafter. This printer has a configuration in which a paper feed section 2 in which a paper feed cassette 45 in which paper P as a recording material is stored is disposed is disposed at the lower part of the apparatus main body 1, and an image forming section 3 is disposed thereon. It has become. The image forming unit 3 includes an image forming unit 8 including four image forming units 8Y, 8C, 8M, and 8BK as a plurality of image forming units including an image carrier, and a plurality of rollers 4, 5, and 6. An intermediate transfer belt 7 as an intermediate transfer member constituted by a wound endless belt having flexibility, an optical writing unit 15 as an optical writing unit that performs optical writing on each image carrier, and toner on paper P Fixing means 22 for fixing the image is provided. A conveyance path R for conveying the paper P is formed between the paper feeding unit 2 and the fixing unit 11. The roller 6 is disposed facing the conveyance path R.
[0025]
The space between the roller 4 and the roller 5 of the intermediate transfer belt 7 corresponds to the lower belt running side of this belt. In the intermediate transfer belt 7, a secondary transfer roller 20 serving as a secondary transfer device is disposed at a portion facing the roller 6 so as to face the conveyance path R, and a belt for cleaning the belt surface at a portion facing the roller 4. A cleaning device 21 is provided.
[0026]
The image forming unit 3 is disposed below the intermediate transfer belt 7 by being disposed so as to face the lower running side. Each image forming unit includes a photosensitive drum 10 as an image carrier that is in contact with the intermediate transfer belt 7. Around each photosensitive drum 10, a charging device 11, a developing device 12, and a cleaning device 13 are arranged. A transfer roller 14 as a transfer device that performs primary transfer is provided inside the intermediate transfer belt 7 at a position where each photosensitive drum 10 is in contact with the intermediate transfer belt 7. In the present embodiment, the image forming units 8Y, 8C, 8M, and 8BK basically have the same structure, and in FIG. 1, only the structure of the image forming unit 8BK is given a reference. Each image forming unit is different in that the color of toner as a developer stored in each developing device 12 is different. The developing devices 12 of the image forming units 8Y, 8C, 8M, and 8BK store yellow, cyan, magenta, and black toners, respectively.
[0027]
The optical writing unit 15 irradiates the surface of each photoconductive drum with light modulated laser light L to form a latent image for each color on the photoconductive surface. In this embodiment, the optical writing unit 15 It is arranged below.
[0028]
When the image forming operation is started, the photosensitive drums 10 of the respective image forming units 8 are rotationally driven clockwise by a driving device (not shown), and the surface of each photosensitive drum is uniformly made to have a predetermined polarity by the charging device 11. Charged. The surface of each charged photosensitive drum is irradiated with laser light L from the optical writing unit 15 to form an electrostatic latent image on each surface. At this time, image information to be exposed on each photosensitive drum is single-color image information obtained by separating a desired full-color image into color information of yellow, cyan, magenta, and black. The electrostatic latent image formed in this way is visualized as a toner image by the toner of each developing device 12 when passing between each photoconductor and the developing device 12.
[0029]
One of the plurality of rollers 4, 5 and 6 around which the intermediate transfer belt 7 is wound is rotationally driven in a counterclockwise direction by a driving device (not shown), whereby the intermediate transfer belt 7 is counterclockwise indicated by an arrow. Driven in the circumferential direction, the other rollers are driven to rotate. The yellow toner image formed by the image forming unit 8Y including the developing device 12 having yellow toner is transferred to the intermediate transfer belt 7 traveling in this way by the transfer roller 14. A cyan toner image formed by the image forming units 8C, 8M, and 8BK, a magenta toner image, and a black toner image are sequentially transferred onto the transferred yellow toner image by the transfer roller 14, and thus the intermediate transfer belt 7 is transferred. Carries a full-color toner image on its surface.
[0030]
Residual toner adhering to the surface of each photosensitive drum after the toner image is transferred is removed from the surface of the photosensitive drum by each cleaning device 13, and then the surface is subjected to a static eliminating action by a static eliminating device (not shown). The surface potential is initialized and prepared for the next image formation.
[0031]
On the other hand, the paper P fed from the paper feed unit 2 is sent to the transport path R, and the paper feed timing is measured by the registration roller pair 21 disposed on the paper feed side from the secondary transfer roller 20. The roller 6 and the secondary transfer roller 20 are fed to the facing portion. At this time, a transfer voltage having a polarity opposite to the toner charging polarity of the toner image on the surface of the intermediate transfer belt is applied to the secondary transfer roller 20, whereby the toner image on the surface of the intermediate transfer belt 7 is applied onto the paper P. Transcribed at once. The paper P to which the toner image has been transferred is conveyed to the fixing means 22 and when passing through the fixing means 22, heat and pressure are applied to melt and fix the toner image. The printed material P1 on which the toner image is fixed is positioned at the end of the transport path R, and is transported to the discharge unit 23 provided near the top of the apparatus main body 1 to be stacked on the top of the apparatus main body 1. Is discharged. After the toner image is transferred onto the paper P, the toner remaining on the intermediate transfer belt 7 is removed from the cleaning device 21.
[0032]
The printer configured as described above is provided with four image forming units 8Y, 8M, 8C and 8BK facing the intermediate transfer belt 7, and sequentially transfers the toner images of the respective colors onto the intermediate transfer belt 7. The image forming time can be greatly shortened as compared with a type in which a single image means has a four-color developing device, and a toner image is superimposed and transferred onto an intermediate transfer belt and then transferred onto a sheet. In addition, since the stacking portion 36 is formed on the upper portion of the apparatus main body 1, the stacking section 36 does not jump out from the apparatus main body 1, and the installation area and the occupied area are reduced.
[0033]
The above description is an image forming operation when a full-color image is formed on the paper P. A single-color image is formed using any one of the image forming units of the image forming unit 8, or two colors or A three-color image can also be formed. When monochrome printing is performed using the printer of this embodiment, an electrostatic latent image is formed only on the photosensitive drum 10 of the image forming unit 8BK, developed by the unit, transferred to the paper P, and fixed. Fixing may be performed by means 22.
[0034]
Next, a characteristic configuration of this embodiment will be described.
The discharge unit 23 that discharges the printed matter P1 to the stacking unit 36 formed on the upper portion of the apparatus main body 1 is formed on the upper right side of the apparatus main body 1. In the exterior of the apparatus main body 1, that is, the exterior 1A located above the discharge section 23 and covering the discharge section 23, a tray 46 on which the printer operation panel 60 and the paper P are placed is the front of the apparatus main body 1. It is arranged so that it can be operated from the right side. In this embodiment, in the printer, the right side of the apparatus main body 1 in which the discharge unit 23 is disposed is the apparatus operation side.
[0035]
A partition plate 50 is provided inside the apparatus main body 1 below the stacking unit 36. The partition plate 50 is disposed between the stacking portion 36 and the upper side of the intermediate transfer belt 7, and forms a storage space portion 51 for a developer storage member in the apparatus main body 1. In the storage space 51, toner storage containers 37, 38, 39, and 40 as a plurality of developer storage members are below the stacking unit 36 and away from the discharge unit 23 indicated by arrows C 1 and C 2. Are in parallel. An arrow C1 is a direction away from the discharge unit 23, and is also a discharge direction of the paper P discharged from the discharge unit 23 (hereinafter referred to as “discharge direction C1”). Arrow C 2 is a direction approaching the discharge unit 23. In the toner storage containers 37, 38, 39, and 40, yellow, cyan, magenta, and black toners are stored, respectively. The toner storage containers 37, 38, 39, and 40 are connected to the developing devices 12 of the image forming units 8Y, 8C, 8M, and 8BK through a toner supply path (not shown), and the toner in each developing device 12 is reduced. Then, the replenishment toner is configured to be supplied to the corresponding developing device.
[0036]
The toner storage containers 37, 38, 39, and 40 are disposed so as to increase from the toner storage container 37 that is closest to the discharge unit 23 toward the toner storage container 40 that is located farthest from the discharge unit 23. In this embodiment, the toner is disposed in the developer space 51 so as to be gradually increased from the toner container 37 toward the toner container 40. The discharge portion 23 is located above the toner storage container 37 and is disposed at substantially the same height as the toner storage container 40.
[0037]
A holder 52 for detachably holding the toner storage containers 37, 38, 39, 40 is disposed in the storage space 51. The holder 52 pulls up the toner storage containers 37, 38, 39, and 40 upward so that each toner storage container goes straight in the same plane as the discharge direction C1 (hereinafter referred to as “apparatus main body width D1”). It can be attached and detached in the upper space in the range of “ The toner storage containers 37, 38, 39, and 40 are positioned in the apparatus main body 1 by being mounted on the holder 52. That is, the toner storage containers 37, 38, 39, and 40 are detachably attached to the apparatus main body 1.
[0038]
The stacking portion 36 is formed in the apparatus main body 1 from the lower side of the discharge section 23 toward the discharge direction C1 and covers the toner storage containers stored in the storage space section 51. It consists of The stacking portion 36 can be opened and closed with respect to the apparatus main body 1, and the open / close center portion 41 is provided in the apparatus main body 1 E far from the toner storage container 40. The opening / closing center portion 41 is disposed at a position lower than the uppermost portion 40 A of the toner storage container 40. As shown in FIGS. 1 and 3, the rotation center portion 41 has its axis positioned in the width direction of the apparatus (hereinafter referred to as “width direction D”) indicated by an arrow D orthogonal to the discharge direction C 1 in the same plane. Thus, a shaft portion 42 provided on the apparatus main body 1 side and a bearing portion 43 provided on the end portion 36B side of the stacking portion 36 and supported by the shaft portion 42 are provided. For this reason, the stacking unit 36 constituted by the exterior 1D has a direction of opening and closing with respect to the apparatus operation side, that is, a direction in which the stacking unit 36 is closer to the discharge unit 23 indicated by arrows C1 and C2. The stacking portion 36 can be opened up to the upper side of the exterior 1A where the operation panel 60 is disposed.
[0039]
The area of the stacking unit 36 is formed to be somewhat larger than the sheet size that can be fed from the sheet feeding unit 2. The stacking portion 36 is formed so as to be inclined so that the end portion 36A located on the discharge portion 23 side is lower than the end portion 36B located on the side far from the discharge portion 23. The end 36A, which is the lowermost part of the stacking unit 36, is disposed at a position lower than the discharge point of the discharge unit 23, and the end 36B, which is the uppermost part of the stacking unit 36, is also shown in FIG. The height is substantially the same as the position of the uppermost portion 1C of the exterior 1A. The paper discharge point refers to the intersection of the horizontal line O with respect to the nip portion of the pair of paper discharge rollers 23A that are arranged in the vertical direction of the apparatus and are opposed to each other and the exterior surface 1B facing the stacking portion 36. The end portion 36 A of the stacking portion 36 is disposed at a position lower than the uppermost portion 37 A of the toner storage container 37.
[0040]
As described above, the toner storage containers 37, 38, 39, and 40 can be attached to and detached from the apparatus main body 1 and can be attached and detached in the upper space within the range of the apparatus main body width D1. , 38, 39, and 40 can be performed in the upper space within the range of the apparatus main body width D1, and the operability for the apparatus and the replacement work for the replacement parts are facilitated.
[0041]
When the toner storage containers 37, 38, 39, 40 arranged in parallel are viewed from the apparatus operation side (discharge unit 23 side), the toner storage containers 37, 38, 39, 40 arranged in parallel are arranged so as to increase from the toner storage container 37 toward the toner storage container 40. The toner storage containers are arranged so as to be displaced vertically. For this reason, the visibility to each toner storage container is improved from the device operation side without being shaded by the discharge port 23, and the operability for the device and the replacement work for the replacement parts are facilitated. Further, when the toner storage containers 37, 38, 39, and 40 are arranged so as to become higher from the toner storage container 37 toward the toner storage container 40, the toner storage container 37 is replaced with the toner storage container 40. Lower than. For this reason, the stacking surface 36 can be formed such that the end of the stacking unit 36 located on the discharge unit 23 side is lower than the end 36B located on the discharge unit 23 side. Without change, the interval between the stacking section 36 and the discharge section 23 can be widened, and the number of sheets that can be stacked on the stacking section 36 can be increased without increasing the height of the apparatus.
[0042]
Since the stacking portion 36 can be opened and closed with respect to the apparatus main body 1 by an opening / closing center portion 41 provided in the apparatus main body 1E farther from the discharge portion 23 than the toner storage container 40, the opening / closing center is opened when the stacking portion 36 is opened. The area where the toner container 40 located on the side of the portion 41 is hidden is reduced, and the opening / closing direction of the stacking portion 36 is Direction to the discharge part It becomes. Therefore, the operability when opening and closing the stacking portion 36 is good, and the visibility of each toner storage container from the device operation side is improved, so that the operability for the device and replacement work for replacement parts are easier. The opening / closing center portion 41 is disposed at a position lower than the uppermost portion 40A of the toner storage container 40 so as to suppress the height of the stacking portion 36. Therefore, each toner is controlled from the device operation side while suppressing the height of the device. Visibility with respect to the storage container can be ensured, and operability with respect to the apparatus and replacement work with respect to replacement parts are further facilitated.
[0043]
Since the stacking portion 36 is configured to be openable upward from the exterior 1A where the operation panel 60 is disposed, the visibility from the device operation side to each toner storage container is improved, and the operability and replacement parts for the device are improved. It becomes easy to replace the
[0044]
Since the discharge unit 36 is disposed above the toner storage container 37 and at substantially the same height as the toner storage container 40, the stacking unit positioned above the toner storage container 37 while suppressing the height of the apparatus. Since the interval between the end 36A serving as the part 36 and the discharge unit 23 can be increased, the number of sheets that can be stacked on the stacking unit 36 can be increased without increasing the height of the apparatus. That is, since the end 36A which is the lowest part of the stacking portion 36 is formed at a position lower than the discharge point of the discharge portion 23, the interval between the discharge point and the end portion 36A of the stack portion 36 can be increased. In addition, since the distance H between the paper discharge point and the end 36A of the stacking section 36 can be increased, the number of sheets that can be stacked on the stacking section 36 can be increased without increasing the height of the apparatus.
[0045]
Since the end portion 36B of the stacking portion 36 is substantially the same height as the uppermost portion 1C of the exterior 1A, the interval between the discharge portion 23 and the stacking portion 36 can be increased within the range of the height of the apparatus, The number of sheets that can be stacked in the section 36 can be increased. Since the end portion 36A is provided at a position lower than the uppermost portion 37A of the toner storage container 37, the interval between the end portion 36A (discharge point) and the discharge portion 23 can be further increased without changing the position of the discharge portion 36. The number of sheets that can be stacked on the stacking unit 36 can be increased.
[0046]
When the stacking portion 36 is configured by the exterior 1D, the stacking portion 36 can be formed on the apparatus main body 1 without increasing the number of parts, and an inclined surface with a lower discharge portion 23 side is formed on the exterior of the apparatus. The volume is also visually reduced.
[0047]
Next, the paper feed cassette 45 and the tray 46 will be described.
The paper feed cassette 45 is supported so as to be slidable with respect to the apparatus main body 1 so as to be freely inserted into and removed from the apparatus main body 1. The direction in which the paper feed cassette 45 is put in and out is the same as the direction in which the paper cassette 45 is far away from the discharge portion 23 indicated by arrows C1 and C2. For this reason, the opening / closing operation to the stacking unit 36 and the loading / unloading operation to / from the paper feed cassette 45 are performed within the range of the apparatus main body width D1, so that even when an obstacle exists in the width direction D of the apparatus main body 1. The opening / closing operation to the stacking unit 36 and the loading / unloading operation to the sheet feeding cassette 45 can be performed without moving the position of the apparatus. In this embodiment, the direction in which the paper feed cassette 45 is put in and out of the apparatus main body 1 is changed. Direction to the discharge part Since the arrows C1 and C2 are used, the opening / closing operation to the stacking unit 36 and the loading / unloading operation to / from the sheet feeding cassette 45 can be performed from the apparatus operation side, so that the operability for the apparatus and the replacement work for the replacement parts are further facilitated. .
[0048]
The lower portion of the tray 46 is rotatably supported by the exterior 1 A by the shaft 44, so that the tray 46 can be opened and closed with respect to the apparatus main body 1. The axis of the shaft 44 is arranged in the width direction D, the standing position where the tray 46 is accommodated in the exterior 1A, and the usage position where the axis 44 rotates from the standing position in the direction of the arrow C1 and protrudes from the exterior 1A to the device operation side. It is supported to open and close freely. That is, the opening / closing direction of the tray 46 with respect to the apparatus main body 1 is as follows. Direction to the discharge part It is said that.
[0049]
For this reason, since the opening / closing operation to the stacking unit 36 and the opening / closing operation to the tray 46 are performed within the range of the apparatus main body width D1, even when an obstacle exists in the width direction D of the apparatus main body 1, the apparatus The opening / closing operation to the stacking unit 36 and the loading / unloading operation to the tray 46 can be performed without moving the position. In this embodiment, the opening / closing direction of the tray 46 with respect to the apparatus main body 1 is changed. Direction to the discharge part Since the arrows C1 and C2 are as follows, the opening / closing operation to the stacking portion 36 and the insertion / removal operation to / from the tray 46 can be performed from the apparatus operation side, and the operability for the apparatus and the replacement work for the replacement parts are further facilitated.
[0050]
Further, in this embodiment, the exterior 1A is provided so as to be openable and closable with respect to the apparatus main body 1 by a shaft portion 47 provided at the lower part on the right side of the apparatus main body 1 on the apparatus operation side, as shown in FIGS. It has been. This shaft portion 17 is also provided so that its axis is positioned in the width direction D, and the opening / closing direction of the exterior 1A is the same as that of the tray 46. Direction to the discharge part The arrows C1 and C2 are as follows. For this reason, the opening / closing operation to the tray 46 and the opening / closing operation to the stacking unit 36 can be performed from the apparatus operation side, and the operability for the apparatus and the replacement work for the replacement parts are further facilitated.
[0051]
As shown in FIGS. 4 and 5, the stacking portion 36 has a plurality of ribs 71, 72, and 73 that extend from the end portion 36 A in a direction away from the discharge portion 23. The ribs 71, 72, 73 are arranged substantially radially from the center portion 36D on the end portion 36A side of the placement surface 36C. The ribs 71, 72, 73 are arranged with a spacing 74, 75 in the width direction D. The ribs 71, 72, and 73 are disposed in a range from the end portion 36 A side of the stacking portion 36 to a substantially central portion of the stacking portion 36. As shown in FIGS. 1 and 6, the ribs 71, 72, and 73 are formed to protrude upward from the loading surface 36 C. In the present embodiment, the ribs 71, 72, 73 are integrally molded with the exterior 1D that constitutes the stacking portion 36, but may be retrofitted to the exterior 1D. In the present embodiment, these ribs correspond to the printed matter P1 discharged from the discharge portion 23 so that the length in the paper discharge direction C1 is approximately half of the stacking surface 36C.
[0052]
When the ribs 71, 72, 73 protruding upward from the stacking surface 36C are formed in the stacking portion 36 in this way, the lower portion P2 of the printed material P1 stacked on each rib and the stack as shown in FIG. Spaces S1 and S2 are formed between the surface 36C. For this reason, when the user picks up the stacked paper P with his / her hand, the user can put his / her finger into this space, which makes it easy to pick it up. Further, when the ribs 71, 72, 73 are arranged substantially radially from the center portion 36D on the end portion 36A side on the mounting surface 36C, as shown in FIG. 5, at the end portion 36B located on the side facing the discharge portion 23. Since the intervals 74 and 75 are widened, when the user picks up the stacked printed matter P1 by hand, the spaces 74 and 75 enter the spaces S1 and S2 formed between the stacking surface 36C and the lower portion P2 of the printed matter on the rib. Since it becomes easier to put a finger, it becomes easier to remove the stacked printed matter P1. Further, since three ribs are arranged in the width direction D and spaced apart by 74 and 75, even when the number of sheets to be stacked is large, the printed material P1 is prevented from being bent on the rib due to its weight. it can. Therefore, even when a large amount of printed material P1 is stacked, the spaces S1 and S2 formed between the stacking surface 36C and the lower portion P2 of the printed material P1 on the rib can be secured, and the printed material stacked in large amounts. Even when the user takes P1, it becomes easy to take.
[0053]
The loading portion 36 of this embodiment is further devised. As shown in FIGS. 4 and 5, a plurality of curved surfaces 80 and 81 are formed from the end portion 36B side to the center portion of the mounting portion 36 and projecting upward from the mounting surface 36C. Has been. The curved surfaces 80 and 81 are continuously formed in the width direction D, and are formed such that a boundary portion 83 between the curved surfaces 80 and 81 that is lower than the center portion is located at the center in the width direction D of the placement surface 36C. The curved surfaces 80 and 81 have a wide width in the width direction D on the end portion 36B side, and a planar shape in which the width decreases toward the discharge portion 23 forms a triangular shape. The distal end portions 80A and 81A of the curved surfaces 80 and 81 extend to both ends of the rib 72 disposed at the center portion in the width direction D of the mounting surface 36C. In the present embodiment, the curved surfaces 80 and 81 are for accommodating the printed matter P1 discharged from the discharge portion 23 so that the length in the discharge direction C1 reaches the end portion 36B of the stacking surface 36C. . The curved surfaces 80 and 81 correspond to the vertical discharge while each rib corresponds to the horizontal discharge.
[0054]
When the curved surfaces 80 and 81 projecting upward from the stacking surface 36C are formed from the end 36B to the center of the stacking portion 36, the printed matter discharged onto the stacking surface 36C as shown in FIG. P1 is stacked on the curved portions 80 and 81. For this reason, since the space S3 is formed between the lower part P2 of the printed matter P1 and the placement surface 36C in the vicinity of the boundary portion 83 where the curved portions 80 and 81 are lowered, the user can print the printed matter P1 from the end 36B side. Since the finger can be put into the space S3 when the hand is picked up by hand, it becomes easy to pick up. The number of the curved surfaces 80 and 81 is not limited to two, and it is preferable that the number of the curved surfaces 80 and 81 is appropriately determined in consideration of the size and stiffness of the paper P. However, if the number of curved surfaces is too large, the user's finger cannot be inserted. Therefore, at least the number of spaces 83 into which the user's finger can be inserted is appropriate.
[0055]
In this embodiment, a more specific configuration is provided. The intermediate transfer belt 6, the image forming unit 8, and the optical writing unit 15 are disposed in the apparatus main body 1 so as to be inclined in the same direction as the inclination direction of the toner storage members 37 to 40, and the stacking unit 36 ( The loading surface 36C) is also inclined in the same direction. In this way, not only the toner storage containers 37 to 40 but also the constituent members disposed in the apparatus main body 1 are inclined in the same direction so as to follow this, so that the intermediate transfer belt 6, the image forming unit 8, and the like. Compared to the configuration in which the optical writing unit 15 is horizontally arranged, the lower portion of the discharge portion 23 can be easily lowered into the apparatus main body 1, so that the discharge portion 23 and the end 36 A side can be reduced without increasing the height of the device. The interval can be widened, the inclination angle of the stacking portion 36 can be easily increased, and the stacking property can be easily improved. Since the stacking unit 36, the toner storage containers 37 to 40, the intermediate transfer belt 6, the image forming unit 8, and the optical writing unit 15 are inclined, the configuration in FIG. The length in the front-rear direction of the apparatus, which is the length relative to the paper direction, can be shortened, and the installation area and occupied area are reduced.
[0056]
【The invention's effect】
According to the present invention, a plurality of developer storage members for supplying developer to each image forming means that are arranged in parallel in a direction closer to the discharge portion in the apparatus main body below the stacking section are provided to the apparatus main body. Since it can be attached and detached and can be attached and detached in the upper space within the range of the apparatus body width orthogonal to the discharge direction of the recording material discharged from the discharge portion, the apparatus can be replaced with a developer storage member. It can be performed in the upper space within the range of the main body width, and the operability for the apparatus and the replacement work for the replacement parts are facilitated.
[0057]
According to the present invention, each developer storage member is disposed so as to become higher from the developer storage member closest to the discharge portion toward the developer storage member located farthest from the discharge portion. When the developer storage member is viewed from the apparatus operation side, the developer storage member will be arranged up and down, and the visibility of each developer storage member from the apparatus operation side will be improved. The operability for the apparatus and the replacement work for the replacement parts are facilitated.
[0058]
According to the present invention, the stacking section is openable and closable with respect to the apparatus main body, and the stacking section is provided by disposing the open / close center part in the apparatus main body farther than the developer storage member located farthest from the discharge section. When opened, the hidden area of the developer storage member located on the opening / closing center side is reduced, the visibility of each developer storage member from the device operation side is improved, and the operability for the device and replacement work for replacement parts are easy. Become.
[0059]
According to the present invention, if the opening / closing center portion of the stacking portion is disposed at a position lower than the uppermost portion of the developer storage member located farthest away, the height of the stacking portion can be suppressed, so the height of the apparatus can be reduced. Visibility to each developer storage member can be ensured from the apparatus operation side while suppressing, and operability for the apparatus and replacement work for replacement parts are facilitated.
[0060]
According to the present invention, the opening / closing center portion is provided in the apparatus main body farther from the developer storage member located farthest from the discharge portion, so that the opening / closing direction of the stacking portion can be changed. Direction to the discharge part Therefore, the operability when opening and closing the stacking portion is good, and the visibility of the developer storage member located below it is improved when it is opened, so that the operability for the apparatus and the replacement work for the replacement parts are easy. Become.
[0061]
According to the present invention, when the stacking portion can be opened to the upper side than the exterior where the operation panel is arranged, the visibility from the apparatus operation side to the developer storage member is improved. The replacement work becomes easy.
[0062]
According to the present invention, the paper feed cassette for storing the recording material is provided so as to be freely inserted into and removed from the apparatus main body, and the opening / closing operation to the stacking unit and the operation to put in and out the paper feed cassette are performed within the range of the apparatus main body width. As a result, even when there are obstacles in the width direction of the main body of the device, the opening / closing operation to the loading unit and the loading / unloading operation to the paper feed cassette can be performed within the device width without moving the device position. The operability and replacement work for replacement parts are facilitated.
[0063]
According to the present invention, the loading / unloading direction of the paper cassette relative to the apparatus main body is determined. Direction to the discharge part By doing so, the opening / closing operation to the stacking unit and the loading / unloading operation to / from the sheet feeding cassette can be performed from the apparatus operating side, and the operability with respect to the apparatus and the replacement work for the replacement parts become easier.
[0064]
According to the present invention, the tray on which the recording material is placed is provided so as to be openable and closable with respect to the apparatus main body, and the opening and closing operation to the stacking unit and the opening and closing operation to the tray can be performed within the range of the apparatus main body width. Even when an obstacle exists in the width direction of the apparatus main body, the opening / closing operation to the stacking unit and the tray can be performed without moving the position of the apparatus, and the operability for the apparatus and the replacement work for the replacement parts are facilitated.
[0065]
According to the present invention, the opening / closing direction of the tray with respect to the apparatus main body is determined. Direction to the discharge part By doing so, the opening / closing operation to the stacking unit and the loading / unloading operation to / from the sheet feeding cassette can be performed from the apparatus operating side, and the operability with respect to the apparatus and the replacement work for the replacement parts become easier.
[0066]
According to the present invention, the uppermost portion of the stacking portion is set to be approximately the same height as the uppermost portion of the exterior where the operation panel is arranged, so that the interval between the discharge portion and the stacking portion is within the range of the height of the apparatus. Although it is easy to make and the operability for the apparatus and replacement work for replacement parts are easy, a large amount of recording materials to be discharged can be loaded while suppressing the height and installation area of the apparatus. Further, since the apparatus is planar, it is not necessary to form a cushioning material used for delivering the image forming apparatus in a special shape, and delivery and packaging costs can be suppressed.
[0067]
According to the present invention, since the lowermost portion of the stacking portion is provided at a position lower than the uppermost portion of the developer storage member positioned at the lowermost position, the interval between the stacking surface and the discharge portion can be increased without changing the position of the discharge portion. Although it is possible to expand more and the operability for the apparatus and replacement work for replacement parts are not easily performed, it is possible to load a large amount of recording materials to be discharged while suppressing the height and installation area of the apparatus.
[0068]
According to the present invention, by forming the stacking portion with the exterior of the apparatus main body covering the developer storage member, the stacking portion can be formed without increasing the number of parts, and the discharge surface side is lowered on the exterior of the apparatus Therefore, the external appearance of the apparatus can be visually reduced both in terms of volume.
[0069]
According to the present invention, the recording that is loaded on the loading surface by the plurality of ribs that are provided in the loading portion and extend in the direction away from the discharging portion from the end located below the discharging portion and project upward from the loading surface. Since a space is formed between the lower part of the material and the loading surface, when the user takes the loaded recording material by hand, the user can put his / her finger into this space, which makes it easier to remove. In addition, by arranging the plurality of ribs substantially radially from the central portion on the end side on the mounting surface, the rib spacing is widened on the side facing the discharge portion, and the recording material is stacked and loaded by the user. , The finger can easily be put into the space formed between the stacking surface and the lower portion of the stacked recording material, so that the recording material can be more easily removed.
[0070]
According to the present invention, the recording material discharged onto the stacking surface protrudes upward in a direction orthogonal to the discharge direction of the recording material discharged from the discharge portion of the loading surface of the stacking portion in the same plane. Since the sheets are stacked on the plurality of curved surfaces formed, a space is formed between the lower portion of the stacked recording materials and the stacking surface having no curved portion. For this reason, when the recording material is stacked and the user picks up the hand by hand, the finger can be put into this space, so that it becomes easy to pick it up.
[0071]
According to the present invention, not only the mounting surface of the stacking unit, but also the image forming unit having a plurality of image forming units, the intermediate transfer body to which the image formed by the image forming unit is transferred, and the respective images of the image forming unit The optical writing unit that performs optical writing on the carrier is also inclined in substantially the same direction as the developer storage member, so that the discharge member has a structure that is horizontal compared to the configuration in which these components are arranged horizontally. The lower part can be easily lowered into the apparatus main body, and the length of the apparatus in the front-rear direction is shortened. Therefore, without increasing the height of the device, the interval between the discharge portion and the loading portion can be widened, and a large amount of recording material can be loaded while suppressing the height and installation area of the device, The inclination angle of the loading portion can be easily increased, and stackability can be easily improved. Moreover, since the length of the apparatus in the front-rear direction is shortened, the installation area and the occupied area can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic configuration of an image forming apparatus according to the present invention.
FIG. 2 is a perspective view illustrating an appearance of the image forming apparatus according to the present invention when viewed from the front side of the apparatus.
FIG. 3 is a perspective view showing an external appearance when a state in which an exterior of a stacking unit and an apparatus main body is opened is viewed from the front side of the apparatus.
FIG. 4 is a perspective view showing an external appearance of the image forming apparatus according to the present invention when viewed from the rear side of the apparatus.
5 is a plan view of the image forming apparatus shown in FIG.
FIG. 6 is an enlarged view for explaining the configuration and operation of a plurality of ribs provided in the stacking unit.
FIG. 7 is an enlarged view for explaining a plurality of curved surfaces provided in the stacking portion and their operation.
[Explanation of symbols]
1 Main unit
1A exterior
1B The top of the exterior
1D Exterior of the device body covering the developer storage member
1E Remote device body
7 Intermediate transfer member
8 Imaging Department
8Y, 8C, 8M, 8BK Multiple image forming means
10 Image carrier
15 Optical writing part
22 Fixing means
23 Discharge section
36 Loading section
36A The lowest part of the loading part (the end located below the discharge part)
36B The top of the loading section
36C Loading surface
36D Center on the end side
37 Developer storage member closest to
37A Top of developer storage member
37, 38, 39, 40 Multiple developer storage members
40 Developer storage member located farthest away
40A Top of developer storage member
41 Opening / Closing Center
60 Operation panel
71, 72, 73 Multiple ribs
80, 81 Multiple curved surfaces
A Discharge point of the discharge unit
C1, C2 Perspective direction (Advancing and retreating direction)
C1 paper discharge direction
D Direction perpendicular to discharge direction
D1 Device body width
P Recording material
42 Shaft
43 Bearing
45 Paper cassette
46 trays

Claims

A toner image formed by an image forming unit having a plurality of image forming units provided with an image carrier is fixed to a recording material by a fixing unit, and the fixed recording material is fixed to the main body of the apparatus in which the image forming unit is disposed. In the image forming apparatus that discharges in the front-rear direction of the apparatus from the discharge section arranged on the apparatus operation side to the stacking section formed on the upper part,
A plurality of developer accommodating members for accommodating developers corresponding to the respective image forming means arranged in parallel in a direction closer to the discharge unit in the apparatus main body below the stacking unit;
Each developer storage member can be attached to and detached from the apparatus main body, and can be attached and detached in an upper space within the range of the apparatus main body width in the same plane as the discharge direction of the recording material discharged from the discharge portion. Made possible
Each developer storage member is disposed so as to become higher from the developer storage member closest to the discharge portion toward the developer storage member located farthest from the discharge portion,
The stacking portion is openable and closable with respect to the apparatus main body, and the open / close center part is provided in the apparatus main body farther than the developer storage member located at the farthest position.
An image forming apparatus characterized in that a control panel on the exterior of the apparatus body which covers the emissions unit.

The image forming apparatus according to claim 1.
The image forming apparatus, wherein the opening / closing center portion is disposed at a position lower than an uppermost portion of the developer storage member located at the farthest position.

The image forming apparatus according to claim 1 or 2,
The rotation center portion includes a shaft portion provided on the device main body side such that an axis thereof is positioned in a width direction of the device main body, a bearing portion provided on the stacking portion and supported by the shaft portion. An image forming apparatus comprising:

The image forming apparatus according to claim 1, 2 or 3.
The image forming apparatus according to claim 1, wherein an opening / closing direction of the stacking unit is a direction away from the discharge unit.

The image forming apparatus according to claim 1, 2, 3, or 4.
The exterior of the apparatus main body on which the operation panel is arranged is located on the apparatus operation side,
The image forming apparatus according to claim 1, wherein the stacking portion is openable to an upper side than an exterior in which the operation panel is disposed.

The image forming apparatus according to claim 5.
The image forming apparatus according to claim 1, wherein the top of the stacking unit has the same height as the top of the exterior on which the operation panel is disposed.

The image forming apparatus according to claim 1,
2. An image forming apparatus according to claim 1, wherein a lowermost position of the stacking portion is lower than an uppermost portion of the developer accommodating member present at the lowest position among the developer accommodating members.

The image forming apparatus according to claim 1,
A paper feed cassette that is provided detachably with respect to the apparatus main body and stores a recording material on which the toner image is fixed;
The image forming apparatus, wherein the opening / closing operation to the stacking unit and the loading / unloading operation to / from the sheet feeding cassette are performed within a range of the apparatus main body width.

The image forming apparatus according to claim 8.
2. An image forming apparatus according to claim 1, wherein a direction in which the paper feeding cassette is taken in and out with respect to the apparatus main body is a direction which is closer to the discharge unit.

The image forming apparatus according to claim 1,
A tray that is provided so as to be openable and closable with respect to the apparatus main body and on which a recording material on which the toner image is fixed is placed;
The image forming apparatus, wherein the opening / closing operation to the stacking unit and the opening / closing operation to the tray are performed within a range of the apparatus main body width.

The image forming apparatus according to claim 10.
2. An image forming apparatus according to claim 1, wherein an opening / closing direction of the tray with respect to the apparatus main body is a direction in which the tray is closer to the discharge unit.

The image forming apparatus according to claim 1,
The image forming apparatus according to claim 1, wherein the stacking unit is an exterior of the apparatus main body that covers the developer storage member.

The image forming apparatus according to claim 1,
The image forming apparatus, wherein the stacking unit includes a plurality of ribs that extend from an end located below the discharge unit in a direction away from the discharge unit and project upward from the stacking surface.

The image forming apparatus according to claim 13.
The image forming apparatus according to claim 1, wherein the plurality of ribs are arranged substantially radially from a central portion on an end side of the stacking surface.

The image forming apparatus according to claim 13 or 14,
The image forming apparatus according to claim 1, wherein the number of the plurality of ribs is three.

The image forming apparatus according to claim 1,
The loading surface of the mounting portion is characterized in that a plurality of curved surfaces projecting upward are formed in a direction orthogonal to the discharge direction of the recording material discharged from the discharge portion in the same plane. Image forming apparatus.

The image forming apparatus according to claim 1,
The image forming apparatus according to claim 1, wherein the stacking surface of the mounting portion is formed to be inclined in substantially the same direction as the developer storage member.

The image forming apparatus according to claim 1,
The plurality of image forming means are arranged to be inclined in substantially the same direction as the arrangement direction of the developer accommodating member,
The image forming apparatus according to claim 1, wherein the stacking surface of the mounting portion is formed to be inclined in the same direction as the plurality of image forming units.

The image forming apparatus according to claim 1,
An intermediate transfer member that is disposed in an inclined direction substantially in the same direction as the developer storage member and onto which an image formed by the image forming unit is transferred;
2. The image forming apparatus according to claim 1, wherein the stacking surface of the mounting portion is formed to be inclined in the same direction as the intermediate transfer member.

The image forming apparatus according to claim 1,
An optical writing unit that is disposed in an inclined manner in substantially the same direction as the developer storage member, and performs optical writing on each image carrier,
The image forming apparatus according to claim 1, wherein the stacking surface of the placement unit is formed to be inclined in the same direction as the optical writing unit.

The image forming apparatus according to claim 1,
An optical writing unit that performs optical writing on each image carrier, and an intermediate transfer member to which an image formed in the image forming unit is transferred,
An image forming apparatus, wherein stacking surfaces of the image forming unit, the optical writing unit, the intermediate transfer member, and the mounting unit are provided to be inclined in substantially the same direction as the developer storage member.