JPH023183B2 - - Google Patents
Info
- Publication number
- JPH023183B2 JPH023183B2 JP12078783A JP12078783A JPH023183B2 JP H023183 B2 JPH023183 B2 JP H023183B2 JP 12078783 A JP12078783 A JP 12078783A JP 12078783 A JP12078783 A JP 12078783A JP H023183 B2 JPH023183 B2 JP H023183B2
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- sleeve
- developer
- magnet roll
- rotation
- 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.)
- Expired
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
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、電子写真装置の現像方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing method for an electrophotographic apparatus.
従来の技術は、感光体の回転を停止させる時
に、現像装置の現像ロールの内スリーブとマグネ
ツトロールの回転も同時に停止させる為、スリー
ブ上には現像剤の層がある厚みで付着したままで
あるため、感光体表面に現像剤が付着した状態の
ままで感光体が放置されることになる。よつて、
この感光体に付着した現像剤が吸湿剤となり、感
光体の劣化や感光体表面に現像剤が強力に付着
し、いわゆるフイルミングの原因となる欠点があ
つた。 In conventional technology, when the rotation of the photoreceptor is stopped, the rotation of the inner sleeve of the developing roll of the developing device and the magnet roll is also stopped at the same time, so a layer of developer remains attached to a certain thickness on the sleeve. Therefore, the photoreceptor is left with the developer attached to the surface of the photoreceptor. Then,
The developer adhering to the photoreceptor becomes a moisture absorbent, resulting in deterioration of the photoreceptor and strong adhesion of the developer to the surface of the photoreceptor, resulting in so-called filming.
又、スリーブにスクレーパー等を設け、現像時
以外はスリーブ上に現像剤を付着させない方式の
電子写真現像装置においては、装置が複雑となつ
たり、スクレーパーの寿命などの問題があつた。 Further, in electrophotographic developing apparatuses in which a scraper or the like is provided on the sleeve and developer is not allowed to adhere to the sleeve except during development, the apparatus becomes complicated and there are problems such as the lifespan of the scraper.
本発明は、上記した問題を解決し、簡単な制御
で、感光体の回転を停止させる時に現像剤と感光
体の接触状態をなくし、感光体を清掃した状態で
その回転を停止させることを目的とする。 An object of the present invention is to solve the above-mentioned problems, eliminate contact between the developer and the photoreceptor when stopping the rotation of the photoreceptor, and stop the rotation with the photoreceptor cleaned. shall be.
本発明は、現像ロールのマグネツトロールのみ
による現像剤の搬送力は弱く、それによるとスリ
ーブ上の現像剤の層が薄くなるという点に着目
し、感光体の回転を停止させる前に、まずスリー
ブの回転を停止させ、マグネツトロールのみの現
像剤搬送を行なうことによりスリーブ上の現像剤
の層を薄くしてから感光体とマグネツトロールの
回転を停止させ、停止時には現像剤と感光体を非
接触状態にするように工夫したものである。 The present invention focuses on the fact that the developer conveying force by only the magnetic roll of the developing roll is weak, and as a result, the developer layer on the sleeve becomes thin. By stopping the rotation of the sleeve and transporting the developer only by the magnet roll, the layer of developer on the sleeve is thinned, and then the rotation of the photoconductor and magnet roll is stopped. It was devised to make it non-contact.
第１図に本発明の模式図を示す。１感光体、２
は感光体駆動用電動機、３はスリーブ、４はマグ
ネツトロール、５はスリーブ駆動用電動機、６は
マグネツトロール駆動用電動機である。 FIG. 1 shows a schematic diagram of the present invention. 1 photoreceptor, 2
3 is a sleeve, 4 is a magnet roll, 5 is a sleeve drive motor, and 6 is a magnet roll drive motor.
以下に本発明について説明する。電子写真装置
の内、感光体１、スリーブ３、マグネツトロール
４は、それぞれ感光体駆動用電動機２、スリーブ
駆動用電動機５、マグネツトロール駆動用電動機
６により独立に制御し得る構造となつている。現
像状態時には、感光体１、スリーブ３、マグネツ
トロール４はすべて回転しており、スリーブ３上
にはある値に設定した現像剤の層が付着してい
る。現像が終了し感光体１の回転を停止させる時
には、まずスリーブ駆動用電動機５を停止させス
リーブ３の回転を停止させる。するとスリーブ３
上の現像剤はマグネツトロール４のみの搬送とな
り、スリーブ３上の現像剤の層は薄くなる。この
スリーブ上の現像剤の層が薄くなるまでに要する
時間は、および１〜３秒程度である。このような
状態になつた後に感光体駆動用電動機２、マグネ
ツトロール駆動用電動機６を停止させ、感光体
１、マグネツトロール４の回転を停止させる。 The present invention will be explained below. In the electrophotographic apparatus, the photoreceptor 1, the sleeve 3, and the magnet roll 4 are structured so that they can be controlled independently by a photoreceptor driving electric motor 2, a sleeve driving electric motor 5, and a magnet roll driving electric motor 6, respectively. There is. In the developing state, the photoreceptor 1, sleeve 3, and magnet roll 4 are all rotating, and a layer of developer set to a certain value is adhered to the sleeve 3. When development is completed and the rotation of the photoreceptor 1 is to be stopped, the sleeve drive electric motor 5 is first stopped to stop the rotation of the sleeve 3. Then sleeve 3
The developer on the sleeve 3 is transported only by the magnet roll 4, and the layer of developer on the sleeve 3 becomes thin. The time required for the developer layer on the sleeve to become thin is about 1 to 3 seconds. After such a state is reached, the photoreceptor driving electric motor 2 and the magnet roll driving electric motor 6 are stopped, and the rotation of the photoreceptor 1 and the magnet roll 4 is stopped.
このようにすることにより、感光体１の回転が
停止した後、その表面がどのような電位になろう
と、またスリーブ３上に現像剤層の厚みの設定値
が多少変動しようとも、感光体１の回転が停止す
る時点ではスリーブ３上の現像剤の層は薄くなり
感光体１は現像剤の付着がない状態で停止するこ
とになる。 By doing this, after the rotation of the photoreceptor 1 has stopped, no matter what potential the surface of the photoreceptor 1 has, or even if the set value of the thickness of the developer layer on the sleeve 3 changes somewhat, the photoreceptor 1 When the rotation of the photoreceptor 1 stops, the layer of developer on the sleeve 3 becomes thin and the photoreceptor 1 stops without any developer attached.
以上により、感光体に付着した現像剤が吸湿剤
となり感光体の劣化の原因となるということがな
くなる。 As a result, the developer attached to the photoreceptor does not become a moisture absorbent and cause deterioration of the photoreceptor.
感光体１、スリーブ３、マグネツトロール４の
回転の停止のタイミングを違わせるという制御を
する為に感光体駆動用電動機２、スリーブ駆動用
電動機５、マグネツトロール駆動用電動機６の３
個の電動機を使用したが、２個以下の電動機とク
ラツチを使用し制御しても同様の効果を得ること
ができる。 In order to control the rotation stop timing of the photoreceptor 1, sleeve 3, and magnet roll 4 at different times, three motors are used: a photoreceptor drive motor 2, a sleeve drive motor 5, and a magnet roll drive motor 6.
Although two electric motors are used, the same effect can be obtained by using and controlling two or fewer electric motors and clutches.
又、マグネツトロール４にフライホイール、又
はワンウエイクラツチ等を取り付け、スリーブ３
の停止後ある時間はマグネツトロール４が惰性で
回転させるように工夫し、電動機の数を減らして
も同様の効果を得ることができる。 Also, attach a flywheel or one-way clutch to the magnet roll 4, and attach the sleeve 3.
The same effect can be obtained even by reducing the number of electric motors by allowing the magnet roll 4 to rotate by inertia for a certain period of time after it has stopped.
本発明によれば、感光体の回転を停止させる時
には現像装置のスリーブ上の現像剤の層を薄く出
来るため、感光体の表面には現像剤が全く付着し
ていない状態にすることが出来るので、装置の停
止時に現像剤を介しての吸湿等がなくなり、感光
体の劣化や現像剤のフイルミング等が防止でき
る。 According to the present invention, when the rotation of the photoreceptor is stopped, the layer of developer on the sleeve of the developing device can be thinned, so that no developer is attached to the surface of the photoreceptor. When the apparatus is stopped, moisture absorption through the developer is eliminated, and deterioration of the photoreceptor and filming of the developer can be prevented.
第１図は、本発明になる電子写真現像装置の模
式図であ。第２図は、感光体駆動用電動機、スリ
ーブ駆動用電動機、マグネツトロール駆動用電動
機の駆動回路を示すブロツク図である。第３図
は、そのフローチヤートである。
FIG. 1 is a schematic diagram of an electrophotographic developing apparatus according to the present invention. FIG. 2 is a block diagram showing the drive circuits of the photoreceptor drive motor, the sleeve drive motor, and the magnet roll drive motor. FIG. 3 is a flowchart.
Claims (1)
写真現像装置において、感光体の回転を停止させ
る前に現像装置の現像ロールの内、まずスリーブ
の回転を停止させてから、マグネツトロールのみ
による現像剤の搬送を行なわせることによりスリ
ーブ上の現像剤の層を薄くしてから、感光体およ
びマグネツトロールの回転を停止させることを特
徴とする電子写真現像方法。1 In an electrophotographic developing device that attaches a developer to a latent image on the surface of a photoconductor, before stopping the rotation of the photoconductor, first stop the rotation of the sleeve of the developing rolls of the developing device, and then only the magnet roll. 1. An electrophotographic developing method, which comprises thinning a layer of developer on a sleeve by transporting the developer by means of a magnet roll, and then stopping rotation of a photoreceptor and a magnet roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12078783A JPS6012561A (en) | 1983-07-01 | 1983-07-01 | Electrophotography developing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12078783A JPS6012561A (en) | 1983-07-01 | 1983-07-01 | Electrophotography developing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6012561A JPS6012561A (en) | 1985-01-22 |
| JPH023183B2 true JPH023183B2 (en) | 1990-01-22 |
Family
ID=14794984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12078783A Granted JPS6012561A (en) | 1983-07-01 | 1983-07-01 | Electrophotography developing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6012561A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0833688B2 (en) * | 1986-09-30 | 1996-03-29 | 松下電器産業株式会社 | Development device |
| JPS63155164A (en) * | 1986-12-19 | 1988-06-28 | Matsushita Electric Ind Co Ltd | Electrostatic copying machine |
-
1983
- 1983-07-01 JP JP12078783A patent/JPS6012561A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6012561A (en) | 1985-01-22 |
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