JPS642265U - - Google Patents
Info
- Publication number
- JPS642265U JPS642265U JP9747787U JP9747787U JPS642265U JP S642265 U JPS642265 U JP S642265U JP 9747787 U JP9747787 U JP 9747787U JP 9747787 U JP9747787 U JP 9747787U JP S642265 U JPS642265 U JP S642265U
- Authority
- JP
- Japan
- Prior art keywords
- heater
- heater current
- fixing
- image forming
- forming apparatus
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Fixing For Electrophotography (AREA)
Description
第１図はこの考案の一実施例であるブロツクダ
イヤグラムであり、第２図はこのブロツクダイヤ
グラムの各部の波形図であり、第３図は他の実施
例の波形図である。
１０……ゼロクロス検出回路、２０……トライ
アツク、３０…定着ヒータ、４０……サーミスタ
、５０……ＣＰＵ、６０……トランジスタ。
FIG. 1 is a block diagram of one embodiment of this invention, FIG. 2 is a waveform diagram of each part of this block diagram, and FIG. 3 is a waveform diagram of another embodiment. 10... Zero cross detection circuit, 20... Triack, 30... Fixing heater, 40... Thermistor, 50... CPU, 60... Transistor.
Claims (1)
電源周波数のゼロクロスを検出するゼロクロス検
出回路と、定着ヒータと、定着ヒータに流すヒー
タ電流を制御する交流制御素子と、交流制御素子
にヒータ電流のオンオフ信号を送る制御手段とを
具備しており、前記ヒータ電流が所定の値に到達
するまでの期間は半サイクル間隔単位でヒータ電
流を流すように前記オンオフ信号を制御するよう
にしたことを特徴とする画像形成装置における定
着ヒータの制御装置。 (2) 前記ヒータ電流の所定の値が８乃至１５Ａ
であることを特徴とする実用新案登録請求の範囲
第１項記載の画像形成装置における定着ヒータの
制御装置。 (3) 前記ヒータ電流が所定の値に到達するまで
の期間は半サイクル間隔おきにヒータ電流を流す
ように前記オンオフ信号を制御するようにしたこ
とを特徴とする実用新案登録請求の範囲第１項乃
至第２項記載の画像形成装置における定着ヒータ
の制御装置。 (4) 前記ヒータ電流が所定の電流に到達するま
での期間は、最初の半サイクルにＨ、次の数回の
Ｌ、以後Ｈの後にＬを現出せしめるインターバル
を時間の経過と共に短縮せしめる如く、ヒータ電
流を流すように前記オンオフ信号を制御するよう
にしたことを特徴とする実用新案登録請求の範囲
第１項乃至第２項記載の画像形成装置における定
着ヒータの制御装置。[Scope of claim for utility model registration] (1) A temperature measuring element that measures the temperature of the fixing roller;
It is equipped with a zero cross detection circuit that detects a zero cross of a power supply frequency, a fixing heater, an AC control element that controls a heater current flowing to the fixing heater, and a control means that sends an on/off signal of the heater current to the AC control element, A control device for a fixing heater in an image forming apparatus, wherein the on/off signal is controlled so that the heater current flows at half cycle intervals until the heater current reaches a predetermined value. (2) The predetermined value of the heater current is 8 to 15A.
A control device for a fixing heater in an image forming apparatus according to claim 1, characterized in that: (3) Utility model registration claim 1, characterized in that the on/off signal is controlled so that the heater current flows at half-cycle intervals until the heater current reaches a predetermined value. A control device for a fixing heater in an image forming apparatus according to items 1 to 2. (4) The period until the heater current reaches a predetermined current is such that the interval between H appearing in the first half cycle, L appearing several times after that, and L appearing after H is shortened with the passage of time. 3. A control device for a fixing heater in an image forming apparatus according to claim 1, wherein the on/off signal is controlled so as to cause a heater current to flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9747787U JPS642265U (en) | 1987-06-25 | 1987-06-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9747787U JPS642265U (en) | 1987-06-25 | 1987-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS642265U true JPS642265U (en) | 1989-01-09 |
Family
ID=30964435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9747787U Pending JPS642265U (en) | 1987-06-25 | 1987-06-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS642265U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0323814U (en) * | 1989-07-19 | 1991-03-12 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53141045A (en) * | 1977-05-16 | 1978-12-08 | Hitachi Ltd | Temperature controller |
| JPS5746258A (en) * | 1980-09-05 | 1982-03-16 | Ricoh Co Ltd | Controlling system for electric power of copying machine |
| JPS58136072A (en) * | 1982-02-08 | 1983-08-12 | Hitachi Ltd | Fixing device of copying machine |
-
1987
- 1987-06-25 JP JP9747787U patent/JPS642265U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53141045A (en) * | 1977-05-16 | 1978-12-08 | Hitachi Ltd | Temperature controller |
| JPS5746258A (en) * | 1980-09-05 | 1982-03-16 | Ricoh Co Ltd | Controlling system for electric power of copying machine |
| JPS58136072A (en) * | 1982-02-08 | 1983-08-12 | Hitachi Ltd | Fixing device of copying machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0323814U (en) * | 1989-07-19 | 1991-03-12 |
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