JPS63121870A - Electrophotographic color image forming machine - Google Patents

Electrophotographic color image forming machine

Info

Publication number
JPS63121870A
JPS63121870A JP26667286A JP26667286A JPS63121870A JP S63121870 A JPS63121870 A JP S63121870A JP 26667286 A JP26667286 A JP 26667286A JP 26667286 A JP26667286 A JP 26667286A JP S63121870 A JPS63121870 A JP S63121870A
Authority
JP
Japan
Prior art keywords
speed
motor
ohp
transfer
image forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP26667286A
Other languages
Japanese (ja)
Inventor
Setsuo Soga
節夫 曽我
Mitsuo Hasebe
光雄 長谷部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP26667286A priority Critical patent/JPS63121870A/en
Publication of JPS63121870A publication Critical patent/JPS63121870A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To fix a proper image on a light transparent film by switching the driving speed of a transfer drum according to the 1st conveyance fixation condition and the 2nd conveyance fixation condition in synchronism with the end of a transfer process of final color. CONSTITUTION:When a print button is pressed in overhead projector (OHP) mode, a main control part sends an operation command 36 and the 1st speed command 37 for driving a motor at the 1st speed to a motor control circuit, and the motor begins to rotate at the 1st speed; and respective process parts are controlled at predetermined timing and the main control part sends the 2nd speed command to the motor control circuit in synchronism with the end of the transfer process of the final color to vary the rotating speed of the motor to the 2nd speed, i.e. slow speed, thus obtaining an excellent OHP image. The 1st speed command is sent out again after a fixing process and the rotating speed of the motor is reset to the 1st speed. All processes are carried out at the 1st speed except in the OHP mode. Consequently, the transparency of the OHP film is improved.

Description

【発明の詳細な説明】 (技術分野) 本発明は複写機、プリンタ、ファクシミリ等の電子写真
式カラー作像機に関し、特に装置全体の小型化に寄与す
る定着機構の改良に係る。
DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an electrophotographic color image forming machine such as a copying machine, a printer, or a facsimile machine, and particularly relates to an improvement in a fixing mechanism that contributes to miniaturization of the entire apparatus.

(従来技術) 一般にこの種のカラー作像機は、複写機、プリンター、
印刷機またはファクシミリ等の記録装置用として使用さ
れる。
(Prior Art) Generally, this type of color image forming machine is used for copying machines, printers,
Used for recording devices such as printing machines or facsimiles.

特に代表的なものである複写機では、感光体上にトナー
像を形成し、紙面上にこのトナー像を静電的に支持し、
その後一対のローラ間で加熱加圧処理する事でフルカラ
ー画像或いは単色カラー画像を得ている。
In a particularly typical copying machine, a toner image is formed on a photoreceptor, and this toner image is electrostatically supported on a paper surface.
Thereafter, a full color image or a monochromatic color image is obtained by heating and pressurizing the image between a pair of rollers.

ところが、近年この種の装置では普通紙(厚手紙、ハガ
キ紙、第2原図、剥離紙)の使用の他、オーバーヘッド
プロジェクタ−(以下○HPと略す)に用いる透明フィ
ルムへの画像記録も重要なものとなっている。
However, in recent years, in addition to the use of plain paper (thick letter, postcard paper, second original drawing, release paper), it has become important for this type of device to record images on transparent film used for overhead projectors (hereinafter abbreviated as ○HP). It has become a thing.

しかしこの要求度が非常に大きいにもかかわらず、透明
フィルムへの投影画像は不透明であり、実用的な色調が
得られなかった。例えばイエロートナーの投影画像は全
体に黒ずみ、特にハイコントラスト部分はグレイになる
。また他の色調も全体的に暗い感じのするものであった
However, despite this extremely high requirement, images projected onto transparent films were opaque, making it impossible to obtain practical color tones. For example, a projected image using yellow toner will appear dark overall, and particularly high-contrast areas will become gray. In addition, the other color tones also seemed dark overall.

これらの現像はフィルム上のカラートナー層表面が粗で
あることが影響してOHPの投影光がトナー層を通過す
る際、光が屈折、散乱する事によって生じていた。
These developments were caused by the roughness of the surface of the color toner layer on the film, which caused the OHP projection light to be refracted and scattered when it passed through the toner layer.

この不具合を解消する方法が種々提案されている。例え
ば特開昭59−188673号公報、特開昭60−86
574号公報では、OHP用紙の時は、定着ローラ周速
を下げ、トナーに与える熱量を多くすることによって充
分トナーを溶融状態にし、トナー表面を鏡面にする。
Various methods have been proposed to solve this problem. For example, JP-A-59-188673, JP-A-60-86
According to Japanese Patent No. 574, when using OHP paper, the peripheral speed of the fixing roller is lowered and the amount of heat given to the toner is increased to sufficiently melt the toner and make the surface of the toner mirror-like.

又、具体的に装置として実施する場合、定着前の搬送部
で転写材の位置を検知し、定着器の速度を変速する方法
が実開昭59−192158号公報で提案されている。
Further, when specifically implementing the method as an apparatus, Japanese Utility Model Application Laid-Open No. 59-192158 proposes a method in which the position of the transfer material is detected in a conveying section before fixing and the speed of the fixing device is varied.

しかしながら上記の様に、搬送部を設ける事は装置が大
きくなると言う欠点がある。
However, as mentioned above, providing the conveying section has the disadvantage that the apparatus becomes larger.

第2図は従来例に係るカラー複写機の全体構成図である
FIG. 2 is an overall configuration diagram of a conventional color copying machine.

図において、1は照明器、2はレンズ、3は色分解フィ
ルター、4は光学系ファン、5は感光体ドラム、6は帯
電器、7は除電器、8はイレーザ、9はマゼンタ現像器
、10はシアン現像器、11はイエロー現像器、12は
転写前除電器、13は転写ドラム、14は転写部、15
は分離部、16はクリーニング前除電器、17はクリー
ニング部、18は給紙部、19はレジストローラ、20
は定着部、21は排紙トレイである。
In the figure, 1 is an illuminator, 2 is a lens, 3 is a color separation filter, 4 is an optical system fan, 5 is a photosensitive drum, 6 is a charger, 7 is a static eliminator, 8 is an eraser, 9 is a magenta developer, 10 is a cyan developer, 11 is a yellow developer, 12 is a pre-transfer static eliminator, 13 is a transfer drum, 14 is a transfer section, 15
1 is a separating section, 16 is a pre-cleaning static eliminator, 17 is a cleaning section, 18 is a paper feeding section, 19 is a registration roller, 20
2 is a fixing section, and 21 is a paper discharge tray.

この様に従来例では、転写ドラム13と定着部20との
間に搬送部22が設けてあり、転写紙が転写ドラム13
から完全に離れた位置から、搬送部22と定着部20の
速度を下げる必要があるため、その距離は当然最大転写
紙サイズ分必要となる。
In this way, in the conventional example, the conveying section 22 is provided between the transfer drum 13 and the fixing section 20, and the transfer paper is transferred to the transfer drum 13.
Since it is necessary to reduce the speed of the conveying section 22 and the fixing section 20 from a position completely away from the transfer paper, the distance is naturally required to be equal to the maximum transfer paper size.

(目的) 本発明はこの様な背景に基づいてなされたものであり、
転写ドラムと感光体ドラムを有するカラー作像機を前提
とし、装置を大型化することなく、透光フィルムに好適
な画像を定着することが出来るカラー作像機を提案する
ことを目的とする。
(Purpose) The present invention was made based on this background,
The present invention is based on a color image forming machine having a transfer drum and a photosensitive drum, and an object of the present invention is to propose a color image forming machine capable of fixing a suitable image on a transparent film without increasing the size of the device.

(構成) このために本発明は、感光体上のトナーを転写材に転写
した後、転写ドラムの回転を減少させるものであり、転
写部と定着部の距離は略転写材の長さに設定でき、大幅
な小型化を可能としたものである。
(Structure) For this purpose, the present invention reduces the rotation of the transfer drum after the toner on the photoreceptor is transferred to the transfer material, and the distance between the transfer section and the fixing section is set to approximately the length of the transfer material. This enabled significant miniaturization.

以下、本発明の一実施例を図面に基づいて説明する。Hereinafter, one embodiment of the present invention will be described based on the drawings.

第1図は本発明に係るカラー複写機の概略構成図である
。第2図と同様個所は同一符号を付しである。
FIG. 1 is a schematic diagram of a color copying machine according to the present invention. Components similar to those in FIG. 2 are given the same reference numerals.

作像動作に際しては、感光体5に帯電させ、露光部1で
露光し、現像器11で現像させる。一方、転写材は給紙
部18から給紙し、転写ドラム13に図示しない、クラ
ンプで転写材を巻きつけ、転写チャージャ14でトナー
を転写材に転写する。
During the image forming operation, the photoreceptor 5 is charged, exposed by the exposure section 1, and developed by the developer 11. On the other hand, the transfer material is fed from the paper feed section 18, wrapped around the transfer drum 13 with a clamp (not shown), and the transfer charger 14 transfers the toner onto the transfer material.

感光体5はクリーニング部17でクリーニングし、再度
、帯電、露光、現像、転写、クリーニングを繰り返し、
カラー画像を作成する。3色または4色の画像が作成さ
れた転写ドラム13上の転写紙は、分離部15で転写ド
ラム13より剥離され、定着部20に入り定着される。
The photoreceptor 5 is cleaned in the cleaning section 17, and then charged, exposed, developed, transferred, and cleaned again.
Create a color image. The transfer paper on the transfer drum 13 on which the three-color or four-color image has been created is peeled off from the transfer drum 13 by the separating section 15, enters the fixing section 20, and is fixed.

普通紙の場合は以上のようになり、転写ドラム13と定
着部20の線速は略同−で良い。
In the case of plain paper, the situation is as described above, and the linear speeds of the transfer drum 13 and the fixing section 20 may be approximately the same.

次にOHPの様な透明フィルムの場合は、定着部20の
線速が遅くなる。具体的には9通紙の場合、約1/2位
である。これはトナーに与える熱量を多くする為である
ことは前述の通りである。
Next, in the case of a transparent film such as OHP, the linear speed of the fixing section 20 is slow. Specifically, in the case of 9 papers, it is about 1/2. As mentioned above, this is to increase the amount of heat given to the toner.

そこで本発明は、転写終了後、転写ドラム13を約1/
2の速度で落とし、定着部20も略同−速度で落とす。
Therefore, in the present invention, after the transfer is completed, the transfer drum 13 is
The fixing unit 20 is also dropped at approximately the same speed.

以上の様にする事によって、転写C′ ドラムと定着部の距離が大幅に短縮できる。By doing the above, transfer C' The distance between the drum and the fixing section can be significantly shortened.

第3図は本発明に係る複写機本体のメイン制御回路の一
実施例である。CPUを中心にして、ROM、、RAM
、および110部より構成され、110部としては、複
写機本体のモータ、チャージャ、クラッチ、ソしノイド
等の負荷を駆動するためのドライバと、複写機本体の各
所に設けられたセンサからの信号を入力するための入力
回路、また操作部のキー人力の読み込みと、表示制御を
行うためのシリアル−インターフェース回路、複写機本
体の駆動モータのサーボ制御のためのシリアルインター
フェース回路、RDF、ADF、ソータ、両面ユニット
、給紙装置等の周辺装置の制御を行うオプションボード
用インターフェース、さらに作像条件、操作モード等の
データを記憶しておくための不揮発RAM用インターフ
ェースがある。
FIG. 3 shows an embodiment of the main control circuit of the copying machine main body according to the present invention. Centered around the CPU, ROM, RAM
, and 110 parts, where the 110 part is a driver for driving loads such as the motor, charger, clutch, solenoid, etc. of the copying machine main body, and signals from sensors installed in various parts of the copying machine main body. Input circuit for inputting information, serial interface circuit for reading manual keys on the operating unit and controlling the display, serial interface circuit for servo control of the drive motor of the copier main body, RDF, ADF, sorter , an option board interface for controlling peripheral devices such as a duplex unit and a paper feeder, and a non-volatile RAM interface for storing data such as image forming conditions and operation modes.

第4図に本発明の制御方法の一実施例に係るモータ制御
回路の一実施例を示す。
FIG. 4 shows an embodiment of a motor control circuit according to an embodiment of the control method of the present invention.

図においてマイクロコンピュータ34はPWM制御用カ
ウンタとROMを内蔵しており、メイン制御部からの運
転指令信号36 (モータの○N10FF信号)と速度
指令信号37をインターフェース回路35を介して読み
込み、エンコーダ38によりモータ回転数を計測し、速
度指令信号37と演算を行い、モータ電圧(電流)をP
WM制御する。
In the figure, a microcomputer 34 has a built-in PWM control counter and ROM, reads an operation command signal 36 (motor's ○N10FF signal) and a speed command signal 37 from the main control unit via an interface circuit 35, and outputs an encoder 38. The motor rotation speed is measured using the speed command signal 37, and the motor voltage (current) is calculated using the speed command signal 37.
WM control.

エンコーダ38の出力は2相のパルス列として得られ、
このエンコーダ出力を分解能アップ39とカウンタ40
にて計測し、モータの速度を得る。
The output of the encoder 38 is obtained as a two-phase pulse train,
This encoder output is increased in resolution 39 and counter 40
to obtain the motor speed.

同時に回転方向も検出される(41)。At the same time, the direction of rotation is also detected (41).

ここで得られたモータの速度データと、メイン制御部か
らの速度指令信号37を演算してモータのドライバ42
に加えるパルス信号のデユーティ比を調整して常に速度
指令信号を合致した一定回転を得ることができる。
The motor driver 42 calculates the motor speed data obtained here and the speed command signal 37 from the main control section.
By adjusting the duty ratio of the pulse signal applied to the motor, it is possible to obtain a constant rotation that always matches the speed command signal.

本実施例の複写機においては、操作部に○T(P選択モ
ードボタンを有しており、このOI−r T’選択ボタ
ンを押して、OHPモードにした後、プリントボタンを
押すことにより、○HPモードにて機械が制御される。
The copying machine of this embodiment has a ○T (P selection mode button) on the operation section, and after pressing this OI-r T' selection button to switch to OHP mode, pressing the print button allows you to The machine is controlled in HP mode.

今、○HPモードにてプリン1〜ボタンが押されたとす
ると、メイン制御部からモータ制御回路に対して運転指
令と、第1の速度でモータを駆動するための第1の速度
指令が出され、モータは第1の速度で回転し始める。予
め定められたタイミングに従って、各プロセス部が制御
され、a終色の転写行程の終了に同期して、メイン制御
部からモータ制御回路に対して、第2の速度でモータを
駆動するための第2の速度指令が出され、モータの回転
数は第1の速度から第2の速度に変化する。
Now, if the pudding 1 button is pressed in HP mode, the main control unit issues a driving command to the motor control circuit and a first speed command to drive the motor at the first speed. , the motor begins rotating at a first speed. Each process section is controlled according to predetermined timing, and in synchronization with the end of the final color transfer process, the main control section sends a command to the motor control circuit to drive the motor at the second speed. A second speed command is issued, and the rotation speed of the motor changes from the first speed to the second speed.

ここで第2の速度指令が出され、モータの回転数は第1
の速度から第2の速度が低速となり、良好なOHP画像
を得ることができる。定着行程終了後、再び第1の速度
指令が出され、モータの回転数は第1の速度に復帰し、
次のプリント動作に備える。尚、OHPモードでない時
は、すべての行程が第1の速度で実行される。
Here, a second speed command is issued, and the motor rotation speed is set to the first speed command.
The second speed becomes lower than the above speed, and a good OHP image can be obtained. After the fixing process is completed, the first speed command is issued again, and the motor rotation speed returns to the first speed.
Prepare for the next print operation. Note that when not in the OHP mode, all strokes are executed at the first speed.

第5図は本発明に係る制御動作を示すフローチャートで
ある。
FIG. 5 is a flowchart showing the control operation according to the present invention.

図中、ステップ1(Si以下同様)では、操作部の表示
制御、キー人力処理等を行う。OHPモードキーの0N
10FFもこのルーチンでチェックされ、RAMにOH
Pモードか否かを記憶する。またステップ4では、プリ
ントSWが押されると、モータを第1の速度で駆動する
ための第1速度指令が出され、運転指令がメイン制御部
からモータ制御回路に送られ、モータは第1の速度で回
転し始める。ステップ6では最終色の転写が終了した時
点で、OHPモードか否かをチェックし、○HPモード
であれば、メイン制御部からモータ制御回路に第2速度
指令が出力されてモータは第1の速度から第2の速度に
切り換わる。OHPモードでないときは速度の変更は行
わない。さらにステップ7では転写紙の排出が完了する
と、セット枚数分のコピーが終了したか否かをチェック
し、終了していなければ再び第1速度指令が出力されて
、モータは第1の速度となり、次のコピー動作に入る。
In the figure, in step 1 (same as below), display control of the operation section, manual key processing, etc. are performed. OHP mode key 0N
10FF is also checked by this routine and OH is stored in RAM.
Stores whether it is in P mode or not. In step 4, when the print SW is pressed, a first speed command is issued to drive the motor at the first speed, the driving command is sent from the main control section to the motor control circuit, and the motor is driven at the first speed. It starts rotating at speed. In step 6, when the transfer of the final color is completed, it is checked whether or not the OHP mode is set. If it is the ○HP mode, the second speed command is output from the main control section to the motor control circuit, and the motor is set to the first speed. speed to a second speed. When not in OHP mode, the speed is not changed. Further, in step 7, when the ejection of the transfer paper is completed, it is checked whether or not copying for the set number of sheets has been completed, and if it has not been completed, the first speed command is output again and the motor is set to the first speed. Starts the next copy operation.

セット枚数分のコピーが終了していれば、コピー終了処
理を行い、運転指令をOFFして、モータを停止し、待
機状態に戻る。
If the set number of copies have been completed, a copy end process is performed, the operation command is turned off, the motor is stopped, and the machine returns to the standby state.

(効果) 本発明は以」二述べた通りであり、本発明に係るカラー
作像機によれば、装置の小型化を旧り、且つOHPフィ
ルムの透光性改良を計ることができる。
(Effects) The present invention is as described above, and according to the color image forming apparatus according to the present invention, it is possible to reduce the size of the apparatus and improve the translucency of the OHP film.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例に係るカラー複写機の概略構
成図、第2図は従来例に係るカラー掬与機の概略構成図
、第3図はメイン制御回路の一例を示すブロック図、第
4図はモータ制御回路の一実施例を示す図、第5図は本
発明に係る制御フローチャートである。 5・・・感光体ドラム、13・・・転写ドラム。 M1甥
FIG. 1 is a schematic configuration diagram of a color copying machine according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a color dispenser according to a conventional example, and FIG. 3 is a block diagram showing an example of a main control circuit. , FIG. 4 is a diagram showing one embodiment of a motor control circuit, and FIG. 5 is a control flowchart according to the present invention. 5... Photosensitive drum, 13... Transfer drum. M1 nephew

Claims (2)

【特許請求の範囲】[Claims] (1)感光体ドラム、転写ドラム、定着器を備える電子
写真式カラー作像機であって、普通紙の記録材にトナー
を定着できる第1搬送定着条件を設定できる手段、樹脂
フィルムの記録材にトナーを定着できる第2搬送定着条
件を設定する手段を有する作像機において、最終色の転
写行程の終了に同期して、第1搬送定着条件と第2搬送
定着条件とで転写ドラムの駆動速度を切り替える事を特
徴とする電子写真式カラー作像機。
(1) An electrophotographic color image forming machine equipped with a photoconductor drum, a transfer drum, and a fixing device, a means for setting the first conveyance and fixing conditions that can fix toner on a recording material of plain paper, and a recording material of resin film. In an image forming machine having a means for setting a second conveying and fixing condition that can fix toner, the transfer drum is driven under the first conveying and fixing condition and the second conveying and fixing condition in synchronization with the end of the final color transfer process. An electrophotographic color imaging machine that features switching speeds.
(2)第2搬送定着条件の場合、転写ドラムの駆動速度
を略半分に落とす事を特徴とする特許請求の範囲第(1
)項記載の電子写真式カラー作像機。
(2) In the case of the second transport fixing condition, the driving speed of the transfer drum is reduced to approximately half.
) The electrophotographic color image forming machine described in item ).
JP26667286A 1986-11-11 1986-11-11 Electrophotographic color image forming machine Pending JPS63121870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26667286A JPS63121870A (en) 1986-11-11 1986-11-11 Electrophotographic color image forming machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26667286A JPS63121870A (en) 1986-11-11 1986-11-11 Electrophotographic color image forming machine

Publications (1)

Publication Number Publication Date
JPS63121870A true JPS63121870A (en) 1988-05-25

Family

ID=17434089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26667286A Pending JPS63121870A (en) 1986-11-11 1986-11-11 Electrophotographic color image forming machine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438265A2 (en) * 1990-01-17 1991-07-24 Konica Corporation Color image forming apparatus
US5373354A (en) * 1991-08-26 1994-12-13 Hitachi, Ltd. Color electrophotographic device and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438265A2 (en) * 1990-01-17 1991-07-24 Konica Corporation Color image forming apparatus
US5250999A (en) * 1990-01-17 1993-10-05 Konica Corporation Image forming apparatus having transfer voltage and process speed control
US5373354A (en) * 1991-08-26 1994-12-13 Hitachi, Ltd. Color electrophotographic device and method

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