JPS61236578A - Controlling method for fixing heater - Google Patents
Controlling method for fixing heaterInfo
- Publication number
- JPS61236578A JPS61236578A JP7893085A JP7893085A JPS61236578A JP S61236578 A JPS61236578 A JP S61236578A JP 7893085 A JP7893085 A JP 7893085A JP 7893085 A JP7893085 A JP 7893085A JP S61236578 A JPS61236578 A JP S61236578A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- fixing
- heating roller
- exposing operation
- heater
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は定着ヒータ制御方法に関し、さらに詳細にい
えば、複写動作遂行中に加熱ローラが所定の設定温度以
下になることを確実に防止する定着ヒータ制御方法に関
する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a fixing heater control method, and more specifically, to reliably prevent a heating roller from falling below a predetermined set temperature during a copying operation. The present invention relates to a fixing heater control method.
〈従来の技術〉
従来から定着ヒータ制御方法としては、露光動作時に定
着用の定着ヒータの制御を全く行なわないようにしたも
のがあった。<Prior Art> Conventionally, there has been a fixing heater control method in which the fixing heater for fixing is not controlled at all during the exposure operation.
〈発明が解決しようとする問題点〉
上記の構成のものは、露光動作時における加熱ヒータの
0N−OFF制御を行なわないのであるから、露光動作
時に定着ヒータを0N−OFF制御する構成のものと異
なり、突入電流の影響による電圧降下に起因する複写機
本体の駆動系における速度変動の発生を確実に阻止する
ことができ、画像が不鮮明になるという不都合はないが
、特に複写紙が長い場合には、1枚の複写紙を定着する
ことにより、加熱ローラの温度が低下し、定着不良を生
じさせるという不都合がある。<Problems to be Solved by the Invention> Since the configuration described above does not perform ON-OFF control of the heater during the exposure operation, it is different from the configuration that performs ON-OFF control of the fixing heater during the exposure operation. Unlike this, it is possible to reliably prevent the occurrence of speed fluctuations in the drive system of the copying machine due to voltage drop due to the influence of inrush current, and there is no problem such as blurred images, but this is especially true when the copy paper is long. This method has the disadvantage that the temperature of the heating roller decreases when a sheet of copy paper is fixed, resulting in defective fixing.
この発明は上記の問題点に鑑みてなされたものであり、
画像の不鮮明さを確実に解消することができるとともに
、定着不良の発生をも確実に解消することができる定着
ヒータ制御方法を提供することを目的としている。This invention was made in view of the above problems,
It is an object of the present invention to provide a fixing heater control method that can reliably eliminate image blurring and also reliably eliminate the occurrence of fixing failure.
く問題点を解決するための手段〉
上記の目的を達成するための、この発明の定着ヒータ制
御方法は、加熱ローラの温度が露光動作開始前に所定の
設定温度に達している場合に、一部の定着ヒータを露光
動作終了時点まで強制的に発熱させるものである。Means for Solving the Problems> In order to achieve the above object, the fixing heater control method of the present invention is such that when the temperature of the heating roller reaches a predetermined set temperature before the start of the exposure operation, This is to forcibly generate heat from the fixing heater in the section until the end of the exposure operation.
但し、一部の定着ヒータとしては、加熱ローラを異常昇
温されることのない発熱容量のものを使用することが好
ましい。However, it is preferable to use a part of the fixing heater that has a heat generating capacity that will not cause the heating roller to become abnormally heated.
〈作用〉
上記の方法であれば、露光動作開始前に加熱O−ラの温
度が所定の設定温度に達していた場合に、一部のヒータ
のみに通電することにより、定着装置における消費電力
を抑制し、しかも上記一部のヒータを連続的に発熱させ
ることにより、複写機本体の駆動系の速度を一定に保持
することができる。<Function> With the method described above, if the temperature of the heating roller has reached the predetermined set temperature before the start of the exposure operation, power consumption in the fixing device can be reduced by energizing only some of the heaters. By suppressing the amount of heat generated and causing some of the heaters to generate heat continuously, the speed of the drive system of the copying machine main body can be kept constant.
そして、一部のヒータが加熱ローラを異常昇温させるこ
とのないものとすれば、複写紙による異常吸熱を補償す
ることができる。If some of the heaters do not abnormally raise the temperature of the heating roller, it is possible to compensate for abnormal heat absorption by the copy paper.
〈実施例〉 以下、実施例を示す添付図面によって詳細に説明する。<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.
第1図は定着装置を示す断面図であり、互いに圧接され
て反対方向に回転する加熱ローラ(1)と、加圧ローラ
(2)とを有している。FIG. 1 is a sectional view showing the fixing device, which includes a heating roller (1) and a pressure roller (2) that are pressed against each other and rotate in opposite directions.
上記加熱ローラ(1)は離型性が高い材質で形成された
円筒体(11)の内部に2本の定着ヒータ(12)(1
3)を取付けている。そして、加圧ローラ(2は、円筒
体(21)の周囲にシリコンゴム等からなる表面FIJ
(22)を取付けている。The heating roller (1) has two fixing heaters (12) (1
3) is installed. The pressure roller (2) has a surface FIJ made of silicone rubber etc. around the cylindrical body (21).
(22) is installed.
尚、(31)は複写紙を確実に加熱ローラ(1)と加圧
ローラ(2)との間に導くガイドであり、(32)は定
着後の複写紙を確実に加熱ローラ(1)から剥離させる
ための分離爪であり、(33)は加熱ローラ(1)の温
度を検出するための温度検出素子である。Note that (31) is a guide that ensures that the copy paper is guided between the heating roller (1) and the pressure roller (2), and (32) is a guide that ensures that the copy paper after fixing is guided from the heating roller (1). It is a separation claw for peeling, and (33) is a temperature detection element for detecting the temperature of the heating roller (1).
第2図は定着ヒータ制御方法を実施するためのブロック
図であり、露光動作指示信号、温度検出素子(33)か
らの検出温度信号をマイクロコンピュータ(34)に印
加し、マイクロコンピュータ(34)からの制御信号を
ヒータ制御回路(35)に印加し、ヒータ制御回路(3
5)により定着ヒータ(12)(13)への通電を0N
−OFFIIJtllするようにしている。FIG. 2 is a block diagram for implementing the fixing heater control method, in which an exposure operation instruction signal and a detected temperature signal from the temperature detection element (33) are applied to the microcomputer (34), and A control signal is applied to the heater control circuit (35), and the heater control circuit (3
5), the power to the fixing heaters (12) and (13) is set to 0N.
-OFFIIJtll.
以上の構成であれば、露光動作を行なっていない場合で
あって、ウオームアツプ時、ウェイト時には、温度検出
素子(33)により検出した加熱ローラ(1)の温度に
基づいて再定着ヒータ(12)(13)を0N−OFF
制御し、上記以外の時には、温度検出素子(33)によ
り検出した加熱ローラ(1)の温度に基づいて一方の定
着ヒータ(発熱容けが大きい方の定着ヒータ)を0N−
OFF制御し、加熱ローラ(1)、および加圧ローラ(
2)を所定の設定温度に保持することができる。With the above configuration, when no exposure operation is being performed and during warm-up or wait, the re-fixing heater (12) is activated based on the temperature of the heating roller (1) detected by the temperature detection element (33). (13) 0N-OFF
At times other than the above, one of the fixing heaters (the fixing heater with a larger heat generating capacity) is set to 0N- based on the temperature of the heating roller (1) detected by the temperature detection element (33).
The heating roller (1) and the pressure roller (
2) can be maintained at a predetermined set temperature.
また、露光動作を行なう場合には、加熱ローラ(1)が
所定の設定温度に達していることを、温度検出素子(3
3)からの検出温度信号によって判別し、一方の定着ヒ
ータ(12)に強制的に通電し続けるとともに、図示し
ない光学系を駆動することにより、原稿を露光し、原稿
像に忠実なトナー像を複写紙上に転写した後、複写紙を
加熱ローラ(1)と加圧ローラ(2)との間に導いてト
ナー像を定着することができる。この場合において、特
に大判の複写紙を使用し、しかも連続的に多数枚の複写
動作を遂行するのであれば、加熱ローラ(1)から奪わ
れる熱量が多くなり、加熱ローラ(1)の温度が低下し
勝ちであるが、定着ヒータ(12)に強制的に通電して
いるのであるから、温度低下を確実に防止し、良好な定
着性能を発揮させることができる。In addition, when performing an exposure operation, the temperature detection element (3) detects that the heating roller (1) has reached a predetermined set temperature.
3), and by forcibly continuing to energize one of the fixing heaters (12) and driving an optical system (not shown), the document is exposed to light and a toner image faithful to the document image is formed. After being transferred onto the copy paper, the copy paper can be guided between a heating roller (1) and a pressure roller (2) to fix the toner image. In this case, especially if large-sized copy paper is used and a large number of sheets are copied continuously, the amount of heat taken away from the heating roller (1) will increase, and the temperature of the heating roller (1) will increase. However, since the fixing heater (12) is forcibly energized, a drop in temperature can be reliably prevented and good fixing performance can be achieved.
尚、上記の実施例において、定着ヒータ(12)(13
)の発熱容量は、例えばそれぞれ350W1900Wに
設定してあればよく、露光動作中に通電される定着ヒー
タ(12)を350Wとすることにより、加熱ローラ(
1)の温度低下を防止することかできるとともに、加熱
ローラ(1)の異常昇温を確実に防止することができる
。In the above embodiment, the fixing heaters (12) (13)
The heat generating capacity of the heating roller (
1), it is possible to prevent the temperature from decreasing, and it is also possible to reliably prevent an abnormal temperature rise of the heating roller (1).
〈発明の効果〉
以上のようにこの発明は、露光動作遂行中にJ3ける加
熱ローラの温度低下を確実に防止し、良好な定着性能を
発揮させることができるという特有の効果を奏する。<Effects of the Invention> As described above, the present invention has the unique effect of reliably preventing the temperature of the heating roller J3 from decreasing during the exposure operation and exhibiting good fixing performance.
第1図は定着装置を示す縦断面図、
第2図は定着ヒータ制御方法を実施するためのブロック
図。FIG. 1 is a longitudinal sectional view showing a fixing device, and FIG. 2 is a block diagram for implementing a fixing heater control method.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7893085A JPS61236578A (en) | 1985-04-12 | 1985-04-12 | Controlling method for fixing heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7893085A JPS61236578A (en) | 1985-04-12 | 1985-04-12 | Controlling method for fixing heater |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61236578A true JPS61236578A (en) | 1986-10-21 |
Family
ID=13675586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7893085A Pending JPS61236578A (en) | 1985-04-12 | 1985-04-12 | Controlling method for fixing heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61236578A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6383739A (en) * | 1986-09-29 | 1988-04-14 | Matsushita Electric Ind Co Ltd | Electrophotographic device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5764271A (en) * | 1980-10-06 | 1982-04-19 | Toshiba Corp | Copying machine |
JPS57176078A (en) * | 1981-04-22 | 1982-10-29 | Sharp Corp | Heater driving system of heat roller of copying machine |
JPS58130368A (en) * | 1982-12-23 | 1983-08-03 | Canon Inc | Heating method of fixing device |
-
1985
- 1985-04-12 JP JP7893085A patent/JPS61236578A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5764271A (en) * | 1980-10-06 | 1982-04-19 | Toshiba Corp | Copying machine |
JPS57176078A (en) * | 1981-04-22 | 1982-10-29 | Sharp Corp | Heater driving system of heat roller of copying machine |
JPS58130368A (en) * | 1982-12-23 | 1983-08-03 | Canon Inc | Heating method of fixing device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6383739A (en) * | 1986-09-29 | 1988-04-14 | Matsushita Electric Ind Co Ltd | Electrophotographic device |
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