JPH04288561A - Image formation device - Google Patents
Image formation deviceInfo
- Publication number
- JPH04288561A JPH04288561A JP3052430A JP5243091A JPH04288561A JP H04288561 A JPH04288561 A JP H04288561A JP 3052430 A JP3052430 A JP 3052430A JP 5243091 A JP5243091 A JP 5243091A JP H04288561 A JPH04288561 A JP H04288561A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- fixing
- time
- ready
- heating body
- 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.)
- Granted
Links
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000012937 correction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 2
- 230000000007 visual effect Effects 0.000 abstract 2
- 239000002699 waste material Substances 0.000 abstract 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000003111 delayed effect Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 101000619564 Homo sapiens Putative testis-specific prion protein Proteins 0.000 description 1
- 102100022208 Putative testis-specific prion protein Human genes 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Fixing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は電子写真装置、静電記録
装置等の画像形成装置に関し、特に、加熱定着手段を有
する画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electrophotographic apparatus or an electrostatic recording apparatus, and more particularly to an image forming apparatus having a heat fixing means.
【０００２】0002
【従来の技術】レーザービームプリンタ、複写機等の画
像形成装置では、記録材上の顕画像の定着のために加熱
定着器、特には、熱ローラ定着器が広く用いられている
。2. Description of the Related Art In image forming apparatuses such as laser beam printers and copying machines, heat fixing devices, particularly heat roller fixing devices, are widely used to fix visible images on recording materials.
【０００３】このような画像形成装置では、加熱ローラ
を代表とする加熱体が電源投入から定着温度に達する迄
のウォームアップタイムが必要である。[0003] In such an image forming apparatus, a warm-up time is required for the heating body, typically a heating roller, to reach the fixing temperature after the power is turned on.
【０００４】そこで画像形成が禁止されるウェイトタイ
ムを短縮するために定着温度より低い温度で画像形成動
作を可能とすることが行なわれている。[0004] Therefore, in order to shorten the wait time during which image formation is inhibited, attempts have been made to enable image forming operation at a temperature lower than the fixing temperature.
【０００５】これをレーザービームプリンタを例にとり
説明する。This will be explained using a laser beam printer as an example.
【０００６】図１０は電源投入から加熱ローラが定着温
度に達し１枚目のプリントを得るまで（以後ファースト
プリントタイムと呼ぶ）の加熱ローラの制御を示す図で
ある。FIG. 10 is a diagram showing the control of the heating roller from the time when the power is turned on until the heating roller reaches the fixing temperature and obtains the first print (hereinafter referred to as first print time).
【０００７】プリンタ制御部は電源投入により加熱ロー
ラのヒータをオンするとともにサーミスタ等温度検出器
により加熱ローラ温度をモニターし、所定温度ＴＲに達
したらプリント動作開始可能である趣旨のレデイ信号（
／ＲＤＹ）を有効（以後トルウと称する）とする。画像
信号発生部は前記レデイ信号を受けプリントコードデー
タが存在する場合、コードデータをドットデータに展開
し始めるとともにプリンタ制御部に対しプリント信号（
／ＰＲＮＴ）を送出する。プリンタ制御部はプリント信
号を受けると給紙動作を開始するとともにヒーターをオ
ンし更に定着温度ＴＣまで温度を上げ定着温調モードに
入る。プリントコードデータが存在しない場合、プリン
ト信号が無効（以後フオルスと称する）のままとなり所
定温度ＴＳでのスタンバイ温調モードに入る。そしてレ
デイ温度ＴＲはスタンバイ温度ＴＳと同一温度であり、
その温度は定着温度ＴＣの１０度程度低い温度に設定さ
れ、プリント動作開始より記録材が定着器に達する迄の
時間に於いて十分余裕をもって定着温度に達するよう温
調制御が行なわれる。When the printer control unit turns on the power, it turns on the heater of the heating roller, monitors the temperature of the heating roller using a temperature detector such as a thermistor, and when it reaches a predetermined temperature TR, issues a ready signal (ready signal) indicating that the printing operation can be started.
/RDY) is made valid (hereinafter referred to as true). When the image signal generation section receives the ready signal and print code data exists, it begins to develop the code data into dot data and sends a print signal (
/PRNT). When the printer control section receives the print signal, it starts the paper feeding operation, turns on the heater, further raises the temperature to the fixing temperature TC, and enters the fixing temperature control mode. If print code data does not exist, the print signal remains invalid (hereinafter referred to as false) and a standby temperature control mode is entered at a predetermined temperature TS. And the ready temperature TR is the same temperature as the standby temperature TS,
The temperature is set to about 10 degrees lower than the fixing temperature TC, and temperature control is performed so that the fixing temperature is reached with sufficient margin in the time from the start of the printing operation until the recording material reaches the fixing device.
【０００８】[0008]
【発明が解決しようとする問題点】しかし、この制御方
式によると電源投入後の定着器昇温過程に於いて、レデ
イ信号をトルウとする温度ＴＲを定着器の初期温度や製
造バラツキ等による温度立ち上がり特性バラツキや低温
状態で長時間放置後の電源投入時の加熱ローラの立ち上
がりの遅い場合を影響を考慮しプリント開始より記録材
が定着器に達する迄の最短時間に於いて十分余裕をもっ
て定着温度に達するよう定着温度に十分近い高い温度に
設定している為、ファーストプリントタイムは十分に短
縮されていなかった。[Problems to be Solved by the Invention] However, according to this control method, in the process of increasing the temperature of the fuser after the power is turned on, the temperature TR for which the ready signal is true is changed to a temperature that is caused by the initial temperature of the fuser or manufacturing variations, etc. In consideration of variations in the start-up characteristics and the slow start-up of the heating roller when the power is turned on after being left in a low-temperature state for a long time, the fixing temperature should be set with sufficient margin for the shortest time from the start of printing until the recording material reaches the fixing device. Because the temperature was set high enough to reach the fixing temperature, the first print time was not shortened enough.
【０００９】[0009]
【問題点を解決するための手段】上記問題点を解決する
本発明は、記録材上に顕画像を形成する手段と、記録材
上の顕画像を加熱定着する所定の定着温度に維持される
加熱体を有する定着手段と、を有し加熱体が定着温度よ
り低い所定温度で画像形成を開始、もしくは可能とする
画像形成装置において、上記所定温度を補正する補正手
段を有することを特徴とするものである。[Means for Solving the Problems] The present invention, which solves the above-mentioned problems, includes a means for forming a visible image on a recording material, and a means for heating and fixing the visible image on the recording material by maintaining a predetermined fixing temperature. An image forming apparatus comprising: a fixing means having a heating body; and the heating body starts or enables image formation at a predetermined temperature lower than the fixing temperature, further comprising a correction means for correcting the predetermined temperature. It is something.
【００１０】0010
【実施例】以下本発明の実施例を説明する。[Examples] Examples of the present invention will be described below.
【００１１】図１は本発明の実施例の概略構成図である
。FIG. 1 is a schematic diagram of an embodiment of the present invention.
【００１２】１０１はプリンタエンジンであり画像信号
発生部１０２よりドットデータに展開した画像信号を受
取り記録媒体上にプリントを行なう。A printer engine 101 receives an image signal developed into dot data from an image signal generating section 102 and prints it on a recording medium.
【００１３】１０３はＣＰＵでありプリンタ制御部１０
４とともにプリンタエンジン全体の制御を実行する。103 is a CPU, which is a printer control unit 10.
4 and controls the entire printer engine.
【００１４】感光ドラム１０５は帯電ローラ１１により
均一に帯電され、表面に画像信号により半導体レーザ１
０６をドライブしたレーザービームをポリゴンミラー１
０７により走査し画像の潜像を得る。The photosensitive drum 105 is uniformly charged by a charging roller 11, and a semiconductor laser 1 is applied to the surface by an image signal.
The laser beam that drove 06 is transferred to polygon mirror 1.
07 to obtain a latent image of the image.
【００１５】感光ドラム１０５上の潜像は現像スリーブ
１２により粉体トナーにより現像される。The latent image on the photosensitive drum 105 is developed by the developing sleeve 12 using powder toner.
【００１６】１０９は加熱体たる熱定着ローラでありそ
の内部にはヒーター１０９が配設されＡＣドライバ１１
２に接続しさらにＣＰＵ１０３に接続している。１４は
熱定着ローラと圧接する加圧ローラである。Reference numeral 109 denotes a heat fixing roller serving as a heating element, and a heater 109 is disposed inside the roller, and the AC driver 11
2 and further connected to the CPU 103. 14 is a pressure roller that comes into pressure contact with the heat fixing roller.
【００１７】熱定着ローラ１０９の表面にはサーミスタ
１１１が接触配置されその出力信号はＡ／Ｄコンバータ
ー１１３によりデジタル量としてＣＰＵ１０３に入力し
ている。ＣＰＵ１０３はこれらの構成により熱定着ロー
ラの表面温度を所定定着温度ＴＣとなるようにＡＣドラ
イバをオン／オフし閉ループ制御する。A thermistor 111 is placed in contact with the surface of the heat fixing roller 109, and its output signal is input to the CPU 103 as a digital quantity by an A/D converter 113. With these configurations, the CPU 103 performs closed loop control by turning on/off the AC driver so that the surface temperature of the heat fixing roller reaches a predetermined fixing temperature TC.
【００１８】プリント時にはシート１０８を給紙ローラ
１１５で給紙し、レジストローラ１１４により突きあて
画像信号の垂直同期信号／ＳＹＮＣに同期してレジスト
ローラ１１４を再給紙し電子写真プロセスにより得たド
ラム上のトナー像と先端合わせを行い転写ローラ１３に
よりシート上に転写し、熱定着ローラにより定着し排紙
トレイ１１０に排紙する事によりプリントを得る。At the time of printing, the sheet 108 is fed by the feed roller 115, and the registration roller 114 is re-fed in synchronization with the vertical synchronization signal /SYNC of the abutment image signal. The leading edge of the toner image is aligned with the upper toner image, transferred onto a sheet by a transfer roller 13, fixed by a heat fixing roller, and discharged to a paper discharge tray 110 to obtain a print.
【００１９】図２は前記構成における本第１の実施例の
電源投入から一枚目のプリントを得る迄のプリンタエン
ジンの制御シーケンスを説明するフローチャート図であ
る。又、図３は、図２の制御シーケンスを実行した時の
熱定着ローラの表面の温調制御を表すグラフである。FIG. 2 is a flowchart illustrating the control sequence of the printer engine from power-on to obtaining the first print in the first embodiment having the above configuration. Further, FIG. 3 is a graph showing the temperature control of the surface of the heat fixing roller when the control sequence of FIG. 2 is executed.
【００２０】本実施例では電源投入後プリント動作が可
能もしくは開始となる（以下、レデイ）温度ＴＲを可変
に設定し、定着温度到達タイミングから定着開始タイミ
ング迄の時間が最少、もしくはなくなるようにしている
。In this embodiment, the temperature TR at which the printing operation is enabled or started after the power is turned on (hereinafter referred to as ready) is set variably, and the time from the timing when the fixing temperature is reached to the timing when the fixing starts is minimized or eliminated. There is.
【００２１】電源投入が行なわれるとレデイ信号をフォ
ルスにし（２０１）、レデイとなる温度ＴＲを定着温度
ＴＣと同一温度に設定する（２０２）。つぎに定着ロー
ラの初期温度を読み取り（２０３）、温度レジスタＴｎ
を０クリアー（２０５）した後ヒーターの通電を開始し
（２０６）、ＣＰＵ内のタイマーをスタートさせる。サ
ーミスタの温度を読み取り（２０８）レデイ温度に達す
ればレデイをトルウとする（２１６）。レデイ温度に達
する過程では一定時間Δｔ間隔に２１１以下の処理を行
なう（２１０、２１４）。処理２１１、２１２ではＡ＝
（Ｔｎ＋１−Ｔｎ）／Δｔなる演算を行ない時間Δｔ当
たりの定着器温度上昇率Ａを求める。次にＴＲ＝ＴＣ−
（Ａ×ｔＷ１）なる演算を行ない、給紙開始から定着開
始迄の最短時間ｔＷ１（画像展開時間＜給紙時間と成る
場合）と定着温度ＴＣ、それに先に求めた定着器温度上
昇率Ａからレデイ温度ＴＲを直線近似により求め再設定
する（２１３）。タイマー処理の為のレジスタｔｎを更
新し（２１４）、現在の温度をレジスタＴｎに保存し処
理２０８に戻り処理を繰り返す。この処理をレデイ温度
に達するまで繰り返すことにより立ち上がり特性の処理
で問題となるサーミスタの温度特性等による低温での非
直線性の影響を避け、最終的には直線性の良い温度領域
での計算結果により精度の良い制御が行なえる。When the power is turned on, the ready signal is made false (201), and the ready temperature TR is set to the same temperature as the fixing temperature TC (202). Next, the initial temperature of the fixing roller is read (203), and the temperature register Tn
After clearing to 0 (205), the heater is energized (206) and a timer in the CPU is started. The temperature of the thermistor is read (208), and if the temperature reaches the ready temperature, the ready is set as true (216). In the process of reaching the ready temperature, processes 211 and below are performed at regular time intervals Δt (210, 214). In processes 211 and 212, A=
The calculation (Tn+1-Tn)/Δt is performed to find the fixing device temperature increase rate A per time Δt. Then TR=TC-
(A x tW1), and from the minimum time tW1 from the start of paper feeding to the start of fixing (when image development time < paper feeding time), the fixing temperature TC, and the fixing device temperature increase rate A obtained earlier. The ready temperature TR is determined by linear approximation and reset (213). The register tn for timer processing is updated (214), the current temperature is stored in the register Tn, and the process returns to process 208 to repeat the process. By repeating this process until the ready temperature is reached, the influence of nonlinearity at low temperatures due to the temperature characteristics of the thermistor, etc., which is a problem in processing the rise characteristics, is avoided, and the final calculation result is obtained in a temperature range with good linearity. This allows for more accurate control.
【００２２】レデイ温度に達し制御が２１６に移るとレ
デイをトルウにするとともに２１７でプリント信号があ
るか判定しプリント信号がある場合定着温度ＴＣでの温
調モードに入り（２１９）、無い場合スタンバイ温度Ｔ
Ｓでの温調モードに入る（２１８）。これらの制御によ
り定着器の初期温度状態に係らず常に最適のレデイ温度
を設定する事ができ定着温度到達タイミングから定着開
始タイミング迄の時間が最少になるようにできる。When the ready temperature is reached and the control moves to 216, the ready state is set to true, and it is determined in 217 whether there is a print signal, and if there is a print signal, the temperature control mode is entered at the fixing temperature TC (219), and if there is no print signal, the mode is set to standby. Temperature T
Enter temperature control mode in S (218). Through these controls, it is possible to always set the optimum ready temperature regardless of the initial temperature state of the fixing device, and the time from the timing when the fixing temperature is reached to the timing when fixing is started can be minimized.
【００２３】尚、本実施例では熱定着ローラの温調用の
サーミスタの出力に基づきレデイ温度を補正しているた
め、特別な環境検知用のセンサーを設ける必要がない。In this embodiment, since the ready temperature is corrected based on the output of the thermistor for controlling the temperature of the heat fixing roller, there is no need to provide a special sensor for detecting the environment.
【００２４】［第２実施例］図４は本発明第２の実施例
の制御を説明するフローチャート図である。図５は本発
明第２の実施例の温調制御を表すグラフ図である。ハー
ド構成は第１の実施例と同じである。[Second Embodiment] FIG. 4 is a flowchart illustrating control in a second embodiment of the present invention. FIG. 5 is a graph diagram showing temperature control according to the second embodiment of the present invention. The hardware configuration is the same as the first embodiment.
【００２５】本第２の実施例の特徴は定着器温度上昇率
Ａの決定方法として１回の測定結果を用いるのではなく
過去２回の測定結果を含め３回の平均値を取ることによ
りノイズ等の影響により一時的に温度上昇率Ａが高くな
りレデイ温度が低く設定されレデイ信号がトルウとなり
プリントが開始されてしまうのを防止した事にある。
又、スタンバイ温度ＴＳをレデイ温度ＴＲと同一温度に
設定する事によりプリント時間を延ばすことなくスタン
バイ温度を低く抑える事ができるようにしたものである
。The feature of the second embodiment is that the fixing unit temperature increase rate A is determined by not using the result of one measurement but by taking the average value of three measurements including the past two measurements. This is to prevent the temperature rise rate A from temporarily increasing due to the influence of the above factors, the ready temperature being set low, the ready signal becoming true, and printing being started. Furthermore, by setting the standby temperature TS to the same temperature as the ready temperature TR, the standby temperature can be kept low without extending the printing time.
【００２６】以後図４に従って説明する。４０１〜４０
６は第一の実施例と同様、初期化処理、ヒーターオン、
タイマースタートを行ない、４０７、４０８でレデイ温
度に到達したかチェックし、達していればレデイをトル
ウ（４１８）とし、４１９にてスタンバイ温度ＴＳをレ
デイ温度ＴＲと同一温度に設定し、プリント信号があれ
ば定着温度ＴＣに温調し（４２１）、無い場合スタンバ
イ温度ＴＳでの温調モードに入る（４２１）。レデイ温
度に達する迄の間は４０９〜４１７の処理に於いてΔｔ
間隔で温度を検出しその時点での温度立ち上がり率を計
算し（４１０、４１１）、過去２回の温度立ち上がり率
Ａｎ−１、Ａｎ−２の平均値Ａを計算し、レデイ温度Ｔ
Ｒを演算し設定する（４１３）。４１４〜４１７はレジ
スタデータの更新処理を行なう。[0026] Hereinafter, a description will be given according to FIG. 401-40
6 is the same as the first embodiment, initialization processing, turning on the heater,
Start the timer, check whether the ready temperature has been reached in 407 and 408, and if it has, set the ready to true (418), set the standby temperature TS to the same temperature as the ready temperature TR in 419, and print the print signal. If there is, the temperature is adjusted to the fixing temperature TC (421), and if there is not, the temperature control mode is entered at the standby temperature TS (421). Until the ready temperature is reached, Δt is applied in the processes 409 to 417.
Detect the temperature at intervals, calculate the temperature rise rate at that point (410, 411), calculate the average value A of the past two temperature rise rates An-1 and An-2, and calculate the ready temperature T.
R is calculated and set (413). 414 to 417 perform update processing of register data.
【００２７】以上述べたように制御手段を講じる事によ
りノイズ等の影響により一時的に温度上昇率Ａが高くな
りレデイ温度が低く設定されレデイ信号がトルウとなり
プリントが開始されてしまうのを防止した事にある。
又、スタンバイ温度ＴＳをレデイ温度ＴＲと同一温度に
設定する事によりプリント時間を延ばすことなくスタン
バイ温度を低く抑える事ができるようにしたものである
。
これによりスタンバイ中の消費電力を低く抑える事がで
き、プリント内部の昇温対策も軽減できるメリットがあ
る。As described above, by implementing the control means, it is possible to prevent the temperature rise rate A from temporarily increasing due to the influence of noise, etc., setting the ready temperature low, causing the ready signal to become true, and printing to be started. It's true. Furthermore, by setting the standby temperature TS to the same temperature as the ready temperature TR, the standby temperature can be kept low without extending the printing time. This has the advantage of keeping power consumption low during standby and reducing the need to take measures to increase the temperature inside the print.
【００２８】［第３実施例］図６は本発明第３の実施例
の制御を説明するフローチャート図である。ハード構成
及び温調制御を説明するグラフは第２の実施例と同じで
ある。[Third Embodiment] FIG. 6 is a flowchart illustrating control in a third embodiment of the present invention. The graphs explaining the hardware configuration and temperature control are the same as in the second embodiment.
【００２９】本第３の実施例が前記第１、第２の実施例
に対し異なる点は、レデイ温度算出計算のなかで使われ
る給紙開始から定着開始迄の時間ｔＷ１を一定ではなく
、プリンタの動作条件に応じて可変としたことにある。
即ち、プリンタの解像度の切換によってレーザーの走査
時間を可変としポリゴンミラーの立ち上がり時間が異な
るばあいその立ち上がり時間に応じて給紙から定着開始
迄の時間をｔＷ１を切り替える様にしたものである。The difference between the third embodiment and the first and second embodiments is that the time tW1 from the start of paper feeding to the start of fixing used in the ready temperature calculation is not constant; The reason is that it is variable depending on the operating conditions. That is, the laser scanning time is varied by changing the resolution of the printer, and if the rise time of the polygon mirror is different, the time tW1 from paper feeding to the start of fixing is changed according to the rise time.
【００３０】以後図６に従って本実施例で特徴的な制御
部分について説明する。６０６では初期値として高解像
度でポリゴンモーターの立ち上がりに時間を要する場合
のロングに設定する。そしてレデイ温度設定の前の６１
４、６１５、６１６の処理に於いてポリゴンモーターの
回転数設定値に応じて給紙から定着開始迄の時間をｔＷ
１を切り替える様にしたものである。Hereinafter, the characteristic control portions of this embodiment will be explained with reference to FIG. In step 606, the initial value is set to long, which is used when the polygon motor takes time to start up at high resolution. And 61 before the ready temperature setting
In the processes of 4, 615, and 616, the time from paper feeding to the start of fixing is tW according to the rotation speed setting value of the polygon motor.
1 is switched.
【００３１】尚、本第３の実施例ではポリゴンモーター
の回転数設定値に基づいてｔＷ１を切り替えたがタック
信号等回転数を直線示す信号を基に切換制御を行なって
もよいし、他の給紙から定着開始迄の時間を変化させる
パラメータを検出してｔＷ１を切り替えても良い。要す
るに給紙から定着開始迄の時間をｔＷ１を動的に変化さ
せることにより、定着器昇温とプリントシーケンスのタ
イミングを最適化し、いかなる条件に於いても最適な立
ち上がり時間を得る様にしたものである。In the third embodiment, tW1 was switched based on the set value of the rotational speed of the polygon motor, but the switching control may be performed based on a signal indicating the rotational speed in a straight line, such as a tack signal, or using other methods. tW1 may be switched by detecting a parameter that changes the time from paper feeding to the start of fixing. In short, by dynamically changing tW1, the time from paper feeding to the start of fusing, the temperature rise of the fuser and the timing of the print sequence are optimized, and the optimal start-up time can be obtained under any conditions. be.
【００３２】［第４実施例］図７、図８は本発明第４の
実施例の制御を説明するフローチャート図である。又、
図９は本発明第４の実施例の温調制御を表すグラフであ
る。ハード構成は第１の実施例と同じである。本第４の
実施例が前記第１、第２の実施例に対し異なる点は、レ
デイ温度に達した後も定着ローラーの温度立ち上がり特
性を引き続き測定し定着温度到達時刻がレデイ時点の予
想値より遅くなる場合、垂直同期要求信号（／ＶＳＲＥ
Ｑ）送出をその遅延時間分遅らせる事により、垂直同期
信号（／ＶＳＹＮＣ）を遅らせ、レジストローラーから
の再給紙を遅らせ、定着開始タイミングを遅らせるよう
にした事である。この制御により、電源電圧等の変動に
より定着ローラーの昇温が途中から遅れても定着開始タ
イミングを遅らすことにより定着温度到達とタイミング
を合わせ未定着不良になることを防止することができる
。[Fourth Embodiment] FIGS. 7 and 8 are flowcharts illustrating control in a fourth embodiment of the present invention. or,
FIG. 9 is a graph showing temperature control according to the fourth embodiment of the present invention. The hardware configuration is the same as the first embodiment. The fourth embodiment differs from the first and second embodiments in that the temperature rise characteristics of the fixing roller is continuously measured even after the ready temperature is reached, and the time when the fixing temperature is reached is lower than the expected value at the time of the ready temperature. If the delay occurs, the vertical synchronization request signal (/VSRE
Q) By delaying the sending by the delay time, the vertical synchronizing signal (/VSYNC) is delayed, the refeeding of paper from the registration rollers is delayed, and the fixing start timing is delayed. With this control, even if the temperature rise of the fixing roller is delayed midway due to fluctuations in the power supply voltage, etc., by delaying the fixing start timing, it is possible to synchronize the timing with the arrival of the fixing temperature and prevent a non-fixing failure.
【００３３】以後、図７、図８に従い説明する。レデイ
温度に達する迄の制御は第３の実施例と同じである。但
し、７２２にて定着温度到達予想時刻をレジスタｔＣ１
に記録する。レデイ温度に達すると制御を７２８に移し
遅れ時間レジスタｔｄに０を代入し、７２８〜７３２に
てプリントシーケンスの一連の動作をおこなう。７３７
〜７４３の処理に於いては現在の定着ローラー温度の立
ち上がり特性と時刻より定着温度到達時刻ｔＣ２を算出
し７４４にて遅れ時間ｔｄにｔＣ２−ｔＣ１の遅れ時間
を加算することにより遅れ時間ｔｄを算出する。７３４
にて垂直同期要求タイミングであることを検知すると先
に求めた遅れ時間ｔｄだけタイマーで遅延させ画像信号
発生部に送信する（７４６）。これらの制御により定着
ローラーの昇温が途中から遅れてもその遅延時間だけ定
着開始タイミングを遅らせることができる。[0033] Hereinafter, a description will be given with reference to FIGS. 7 and 8. The control until the ready temperature is reached is the same as in the third embodiment. However, in 722, the expected time when the fixing temperature will be reached is set in the register tC1.
to be recorded. When the ready temperature is reached, control is transferred to 728, 0 is assigned to the delay time register td, and a series of print sequence operations are performed in 728-732. 737
In the processes from to 743, the fixing temperature arrival time tC2 is calculated from the current rising characteristic of the fixing roller temperature and the time, and in 744, the delay time td is calculated by adding the delay time of tC2 - tC1 to the delay time td. do. 734
When it is detected that it is the vertical synchronization request timing, the signal is delayed by the previously determined delay time td using a timer and transmitted to the image signal generation section (746). With these controls, even if the temperature rise of the fixing roller is delayed midway through, the fixing start timing can be delayed by the delay time.
【００３４】以上説明した実施例はほんの一例でありレ
デイ時間を決めるためには、直線近似で決める必要は無
く定着ローラ温度検知センサの特性や定着ローラその物
の特性などにより近似式をたてて行なっても良いし、時
間ｔＷ１の算出方法についても同様な設定値やセンサを
使って求めても良い。The embodiment described above is just one example, and in order to determine the ready time, it is not necessary to determine it by linear approximation, but an approximation formula can be created based on the characteristics of the fixing roller temperature detection sensor, the characteristics of the fixing roller itself, etc. Alternatively, the time tW1 may be calculated using similar set values or sensors.
【００３５】要するに電源投入後の定着器の温度上昇を
温調用温度センサの温度を時々刻々監視しその立ち上が
り特性よりレデイ温度を計算し設定する動的パラメータ
設定手段を設ける事により、特別なハード構成を追加す
る事なしに定着器昇温とプリントシーケンスのタイミン
グを最適化しいかなる条件に於いても最適な立ち上がり
時間を得る様にしたものである。In short, by providing a dynamic parameter setting means that constantly monitors the temperature of the temperature control temperature sensor and calculates and sets the ready temperature from the rising characteristics of the rise in temperature of the fuser after the power is turned on, a special hardware configuration is required. By optimizing the temperature rise of the fixing device and the timing of the print sequence without adding additional components, the timing of the temperature rise of the fixing device and the print sequence are optimized to obtain the optimal start-up time under any conditions.
【００３６】以上本発明の実施例を熱ローラ定着装置を
有する画像形成装置で説明したが、定着方式としては一
定温度に維持される加熱体を有する他の加熱定着方式も
用いることができる。Although the embodiments of the present invention have been described above using an image forming apparatus having a heat roller fixing device, other heat fixing methods having a heating body maintained at a constant temperature may also be used as the fixing method.
【００３７】[0037]
【発明の効果】このように本発明によれば、環境変動や
ジャム処理等により定着器の加熱体の昇温特性に違いが
生じてもレデイ温度が適正に補正されるため、時間的ム
ダ、定着不良を防止することができる。As described above, according to the present invention, even if there is a difference in the temperature rise characteristics of the heating element of the fixing device due to environmental changes, jam processing, etc., the ready temperature can be appropriately corrected, thereby reducing time wastage. Poor fixing can be prevented.
【図１】本発明の実施例の画像形成装置の概略構成図で
ある。FIG. 1 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention.
【図２】本発明の実施例の制御シーケンスを示すフロー
チャートである。FIG. 2 is a flowchart showing a control sequence of an embodiment of the present invention.
【図３】本発明の実施例の加熱体の温度変化を示す図で
ある。FIG. 3 is a diagram showing a temperature change of a heating element in an example of the present invention.
【図４】本発明の第２実施例の制御シーケンスを示すフ
ローチャートである。FIG. 4 is a flowchart showing a control sequence of a second embodiment of the present invention.
【図５】本発明の第２実施例の加熱体の温度変化を示す
図である。FIG. 5 is a diagram showing a temperature change of a heating element according to a second embodiment of the present invention.
【図６】本発明の第３実施例の制御シーケンスを示すフ
ローチャートである。FIG. 6 is a flowchart showing a control sequence of a third embodiment of the present invention.
【図７】本発明の第４実施例の制御シーケンスを示すフ
ローチャートである。FIG. 7 is a flowchart showing a control sequence of a fourth embodiment of the present invention.
【図８】本発明の第４実施例の制御シーケンスを示すフ
ローチャートである。FIG. 8 is a flowchart showing a control sequence of a fourth embodiment of the present invention.
【図９】本発明の第４実施例の加熱体の温度変化を示す
図である。FIG. 9 is a diagram showing a temperature change of a heating element according to a fourth embodiment of the present invention.
【図１０】従来の熱ローラの温度変化を示す図である。FIG. 10 is a diagram showing temperature changes of a conventional heat roller.
１０３ ＣＰＵ １０５ 感光ドラム １０７ ポリゴンモータ １０９ 熱ローラ １１１ サーミスタ 103 CPU 105 Photosensitive drum 107 Polygon motor 109 Heat roller 111 Thermistor
Claims (5)
記録材上の顕画像を加熱定着する所定の定着温度に維持
される加熱体を有する定着手段と、を有し加熱体が定着
温度より低い所定温度で画像形成を開始、もしくは可能
とする画像形成装置において、上記所定温度を補正する
補正手段を有することを特徴とする画像形成装置。Claim 1: A means for forming a visible image on a recording material;
A fixing means having a heating body that heats and fixes a visible image on a recording material and is maintained at a predetermined fixing temperature, and the heating body starts or enables image formation at a predetermined temperature lower than the fixing temperature. An image forming apparatus comprising: a correction means for correcting the predetermined temperature.
部材を有し、上記補正手段は加熱体への通電開始後の立
ち上がり時の温度検知部材の検知温度に基づき上記所定
温度を補正することを特徴とする請求項１の画像形成装
置。2. A temperature sensing member configured to detect the temperature of the heating element, wherein the correcting means corrects the predetermined temperature based on the temperature detected by the temperature sensing member at the time of start-up after the start of energization of the heating element. The image forming apparatus according to claim 1, characterized in that:
の温度変化率に基づき上記所定温度を補正することを特
徴とする請求項２の画像形成装置。3. The image forming apparatus according to claim 2, wherein the correcting means corrects the predetermined temperature based on a rate of temperature change of the heating body at startup.
定時間前の加熱体温度を演算し、この温度を上記所定温
度とすることを特徴とする請求項１から３の画像形成装
置。4. The image forming apparatus according to claim 1, wherein the correction means calculates the temperature of the heating element a predetermined time before the fixing temperature is reached, and sets this temperature as the predetermined temperature.
更に応じて上記所定温度を変更することを特徴とする請
求項４の画像形成装置。5. The image forming apparatus according to claim 4, wherein said correcting means further changes said predetermined temperature in accordance with a change in image forming conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05243091A JP3165702B2 (en) | 1991-03-18 | 1991-03-18 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05243091A JP3165702B2 (en) | 1991-03-18 | 1991-03-18 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04288561A true JPH04288561A (en) | 1992-10-13 |
| JP3165702B2 JP3165702B2 (en) | 2001-05-14 |
Family
ID=12914547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05243091A Expired - Fee Related JP3165702B2 (en) | 1991-03-18 | 1991-03-18 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3165702B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010286588A (en) * | 2009-06-10 | 2010-12-24 | Canon Inc | Image forming apparatus |
| JP2011033969A (en) * | 2009-08-05 | 2011-02-17 | Brother Industries Ltd | Image forming apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101558919B (en) * | 2009-06-05 | 2011-08-31 | 吴荣光 | Sole structure of sports shoes |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121058A (en) * | 1982-01-14 | 1983-07-19 | Ricoh Co Ltd | Recording device |
| JPS58126541A (en) * | 1982-01-25 | 1983-07-28 | Ricoh Co Ltd | Recorder |
| JPS62266571A (en) * | 1986-05-15 | 1987-11-19 | Tokyo Electric Co Ltd | Electrophotographic device |
| JPS63184777A (en) * | 1987-01-28 | 1988-07-30 | Ricoh Co Ltd | Electronic copying device |
| JPS63210960A (en) * | 1987-02-27 | 1988-09-01 | Canon Inc | Recorder |
| JPS63311360A (en) * | 1987-06-15 | 1988-12-20 | Canon Inc | Image forming device |
| JPH02244179A (en) * | 1989-03-17 | 1990-09-28 | Ricoh Co Ltd | Method for controlling preheating temperature of heat fixing roller of facsimile device |
| JPH0375759A (en) * | 1989-08-18 | 1991-03-29 | Ricoh Co Ltd | Waiting time predicting device |
-
1991
- 1991-03-18 JP JP05243091A patent/JP3165702B2/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121058A (en) * | 1982-01-14 | 1983-07-19 | Ricoh Co Ltd | Recording device |
| JPS58126541A (en) * | 1982-01-25 | 1983-07-28 | Ricoh Co Ltd | Recorder |
| JPS62266571A (en) * | 1986-05-15 | 1987-11-19 | Tokyo Electric Co Ltd | Electrophotographic device |
| JPS63184777A (en) * | 1987-01-28 | 1988-07-30 | Ricoh Co Ltd | Electronic copying device |
| JPS63210960A (en) * | 1987-02-27 | 1988-09-01 | Canon Inc | Recorder |
| JPS63311360A (en) * | 1987-06-15 | 1988-12-20 | Canon Inc | Image forming device |
| JPH02244179A (en) * | 1989-03-17 | 1990-09-28 | Ricoh Co Ltd | Method for controlling preheating temperature of heat fixing roller of facsimile device |
| JPH0375759A (en) * | 1989-08-18 | 1991-03-29 | Ricoh Co Ltd | Waiting time predicting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010286588A (en) * | 2009-06-10 | 2010-12-24 | Canon Inc | Image forming apparatus |
| JP2011033969A (en) * | 2009-08-05 | 2011-02-17 | Brother Industries Ltd | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3165702B2 (en) | 2001-05-14 |
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