JPH02129681A - Fixing device in electrophotographic printer - Google Patents
Fixing device in electrophotographic printerInfo
- Publication number
- JPH02129681A JPH02129681A JP28346288A JP28346288A JPH02129681A JP H02129681 A JPH02129681 A JP H02129681A JP 28346288 A JP28346288 A JP 28346288A JP 28346288 A JP28346288 A JP 28346288A JP H02129681 A JPH02129681 A JP H02129681A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- fixing roller
- power source
- fixing
- output
- 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
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電子写真式プリンタの定着装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a fixing device for an electrophotographic printer.
従来、この種の定着装置はトナー画像を記録材に定着す
る定着ローラの温度範囲を定め、定着ローラの温度を検
出し、定着ローラの温度が前記温度範囲から外れないよ
うに熱源用電力の供給・供給停止を繰り返していた。Conventionally, this type of fixing device determines the temperature range of the fixing roller that fixes the toner image on the recording material, detects the temperature of the fixing roller, and supplies power for the heat source so that the temperature of the fixing roller does not deviate from the temperature range.・Supply was repeatedly cut off.
上述した従来の定着装置は熱源用電力の供給・供給停止
を繰り返しているため、定着ローラの温度変化が大きく
なってしまい、安定した定着性能が得られにくく、さら
に熱源の温度により熱源の抵抗値が変化するため、消費
電力が安定しないという欠点がある。The conventional fixing device described above repeatedly supplies and stops the supply of power for the heat source, resulting in large temperature changes to the fixing roller, making it difficult to obtain stable fixing performance, and furthermore, the resistance value of the heat source changes depending on the temperature of the heat source. The disadvantage is that the power consumption is unstable because of the change in the power consumption.
本発明の目的は前記課題を解決した電子写真式プリンタ
における定着装置を提供することにある。An object of the present invention is to provide a fixing device for an electrophotographic printer that solves the above problems.
前記目的を達成するため、本発明は電子写真式プリンタ
における熱定着装置において、記録材に転写されたトナ
ー画像を挾持搬送する一対のローラと、少なくともトナ
ー画像面に接触する側の定着ローラに熱を供給する熱源
と、前記定着ローラの温度を検知する温度検知器と、前
記温度検知器の出力によって定まる少なくとも２種以上
の出力電圧を出力する熱源用電源とを有するものである
。To achieve the above object, the present invention provides a heat fixing device for an electrophotographic printer, in which a pair of rollers that pinch and convey a toner image transferred to a recording material, and at least a fixing roller on the side that contacts the toner image surface are heated. The heat source includes a heat source that supplies a temperature of the fixing roller, a temperature detector that detects the temperature of the fixing roller, and a heat source power source that outputs at least two types of output voltages determined by the output of the temperature sensor.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示す概略図である。FIG. 1 is a schematic diagram showing an embodiment of the present invention.
定着機構１は定着ローラ１ａと加圧ローラ１ｂと熱源Ｉ
Ｃと温度検知器１ｄで構成されている。The fixing mechanism 1 includes a fixing roller 1a, a pressure roller 1b, and a heat source I.
C and a temperature sensor 1d.
電源２は電圧変換部２ａと出力電圧制御部２ｂより構成
されており、電圧変換部２ａは高電圧。The power supply 2 is composed of a voltage converter 2a and an output voltage controller 2b, and the voltage converter 2a is a high voltage converter.
低電圧の２種の電圧を発生する。Generates two types of low voltage.
熱源ＩＣは電源２と接続され、電源２より出力される電
力により定着ローラ１ａを熱する。温度検知器１ｄは定
着ローラ１ａの温度を検出し電源２へ出力する。出力電
圧制御部２ｂは温度検知器１ｄの出力により、定着ロー
ラ１ａの温度がトナ一定着に適する温度範囲以下である
ことを認知した場合、電圧変換部２ａより発生された高
電圧を出力電圧に選択し、又定着ローラ１ａの温度がト
ナ一定着に適する温度範囲内にあることを認知した場合
、電圧変換部２ａより発生された低電圧を出力電圧に選
択し、ス定着ローラ１ａの温度がトナ一定着に適する温
度範囲以上になっていることを認知した場合、熱源ＩＣ
に対する電力供給を停止する。The heat source IC is connected to a power source 2, and uses the power output from the power source 2 to heat the fixing roller 1a. The temperature detector 1d detects the temperature of the fixing roller 1a and outputs it to the power source 2. When the output voltage controller 2b recognizes from the output of the temperature sensor 1d that the temperature of the fixing roller 1a is below the temperature range suitable for constant toner adhesion, the output voltage controller 2b changes the high voltage generated by the voltage converter 2a to the output voltage. If the temperature of the fixing roller 1a is selected and it is recognized that the temperature of the fixing roller 1a is within the temperature range suitable for constant toner adhesion, the low voltage generated by the voltage converter 2a is selected as the output voltage, and the temperature of the fixing roller 1a is adjusted. If it is recognized that the temperature is above the temperature range suitable for constant toner deposition, the heat source IC
Stop power supply to.
以上のような構成により、定着ローラ１ａの温度はトナ
一定着に適する温度に保たれる。With the above configuration, the temperature of the fixing roller 1a is maintained at a temperature suitable for constant toner fixation.
以上説明したように本発明は定着ローラを熱するための
電力の供給を、供給・停止というように２値的に行なう
のではなく、高電圧供給・低電圧供給・供給停止という
ように多段的に行な°うことにより、定着ローラの温度
変化を小さくし、安定した定着性能を得ることができ、
又消費電力を安定させることができる効果がある。As explained above, the present invention supplies power to heat the fixing roller not in a binary manner such as supplying and stopping, but in a multi-stage manner such as supplying high voltage, supplying low voltage, and stopping the supply. By doing this, you can reduce the temperature change of the fixing roller and obtain stable fixing performance.
It also has the effect of stabilizing power consumption.
第１図は本発明の一実施例を示す概略図である。 FIG. 1 is a schematic diagram showing an embodiment of the present invention.
Claims (1)
、記録材に転写されたトナー画像を挾持搬送する一対の
ローラと、少なくともトナー画像面に接触する側の定着
ローラに熱を供給する熱源と、前記定着ローラの温度を
検知する温度検知器と、前記温度検知器の出力によって
定まる少なくとも２種以上の出力電圧を出力する熱源用
電源とを有することを特徴とする電子写真式プリンタに
おける定着装置。(1) In a thermal fixing device in an electrophotographic printer, a pair of rollers that pinch and convey a toner image transferred to a recording material, and a heat source that supplies heat to at least the fixing roller on the side that contacts the toner image surface; A fixing device for an electrophotographic printer, comprising: a temperature detector that detects the temperature of a fixing roller; and a heat source power source that outputs at least two types of output voltages determined by the output of the temperature detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28346288A JPH02129681A (en) | 1988-11-09 | 1988-11-09 | Fixing device in electrophotographic printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28346288A JPH02129681A (en) | 1988-11-09 | 1988-11-09 | Fixing device in electrophotographic printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02129681A true JPH02129681A (en) | 1990-05-17 |
Family
ID=17665858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28346288A Pending JPH02129681A (en) | 1988-11-09 | 1988-11-09 | Fixing device in electrophotographic printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02129681A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0785487A3 (en) * | 1996-01-17 | 1998-03-25 | Ricoh Company, Ltd | Fixing apparatus for an image forming apparatus |
-
1988
- 1988-11-09 JP JP28346288A patent/JPH02129681A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0785487A3 (en) * | 1996-01-17 | 1998-03-25 | Ricoh Company, Ltd | Fixing apparatus for an image forming apparatus |
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