JPS61134773A - Corona charging device - Google Patents
Corona charging deviceInfo
- Publication number
- JPS61134773A JPS61134773A JP25643884A JP25643884A JPS61134773A JP S61134773 A JPS61134773 A JP S61134773A JP 25643884 A JP25643884 A JP 25643884A JP 25643884 A JP25643884 A JP 25643884A JP S61134773 A JPS61134773 A JP S61134773A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- chargers
- charger
- voltage power
- transfer
- 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
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0283—Arrangements for supplying power to the sensitising device
-
- 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
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は、複写機、ファクシミリ装置等における電子写
真装置のコロナ帯電装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a corona charging device for an electrophotographic device such as a copying machine or a facsimile machine.
（従来技術）
一般に、電子写真装置においては、複数のコロナ帯電器
が使用されているが、従来は、各帯電器にそれぞれ個別
に制御される電源が用意されていたため、電源装置が大
形になり、かつコスト的にも高くなるという欠点があっ
た。(Prior Art) In general, multiple corona chargers are used in electrophotographic equipment, but in the past, each charger was provided with an individually controlled power supply, which resulted in a large power supply. However, it also has the disadvantage of being expensive.
（目 的）
そこで本発明は、電源装置の小形化及びトータルコスト
の低減を図るようにしたコロナ帯電装置を提供するもの
である。(Objective) Therefore, the present invention provides a corona charging device that is designed to downsize the power supply device and reduce the total cost.
（構 成）
上記目的を達成するために、１つの高圧電源からその電
源出力を複数の帯電器に対して並列供給する。これによ
り電源の数が減少し、電源装置の小形化及びコストダウ
ンを達成することができる。(Structure) In order to achieve the above object, one high-voltage power supply supplies its power output in parallel to a plurality of chargers. This reduces the number of power supplies, making it possible to downsize and reduce the cost of the power supply device.
以下、本発明の一実施例に基づいて具体的に説明する。Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.
（実施例）
まず、第２図によって電子写真装置の要部の構成及び動
作を説明する。１はドラム表面に設けた感光体、２は感
光体］−を帯電させるための帯電器、３は露光器、４は
現像器、５はトナー像を用紙に転写するための転写器、
６はトナー像が転写された用紙をドラムから分離するた
めの分離器で、転写器５と分離器６は帯電器と同様な構
成である。(Example) First, the configuration and operation of the main parts of an electrophotographic apparatus will be explained with reference to FIG. 1 is a photoreceptor provided on the drum surface; 2 is a charger for charging the photoreceptor; 3 is an exposure device; 4 is a developer; 5 is a transfer device for transferring the toner image onto paper;
A separator 6 separates the paper onto which the toner image has been transferred from the drum, and the transfer device 5 and separator 6 have the same structure as the charger.
７はクリーニング器、８は除電器、９は用紙、１０はコ
ンベアである。このように構成された電子写真装置では
、感光体１が帯電器２のコロナ放電により一様に帯電さ
れ、それに露光器３により画像情報に基づいて潜像が形
成される。次いで潜像は現像器４によるトナーの付着で
顕像化され、トナー像は、転写器５により用紙９の上に
転写される。7 is a cleaning device, 8 is a static eliminator, 9 is paper, and 10 is a conveyor. In the electrophotographic apparatus configured in this manner, the photoreceptor 1 is uniformly charged by corona discharge from the charger 2, and a latent image is formed thereon by the exposure device 3 based on image information. Next, the latent image is visualized by the adhesion of toner by the developing device 4, and the toner image is transferred onto the paper 9 by the transfer device 5.
転写された用紙は分離器６によりドラムから分離され、
コンベア１０によって定着部へ送られる。トナー像がな
くなった感光体は、クリーニング器７により清掃され、
除電器８により残留電荷が取り除かれ、次の帯電に備え
られる。The transferred paper is separated from the drum by a separator 6,
The image is sent to the fixing section by the conveyor 10. The photoreceptor with no toner image is cleaned by a cleaning device 7,
Residual charge is removed by the static eliminator 8, and preparation is made for the next charging.
ここで、感光体１がＳｅ系のものであれば、帯電器２は
正極性のコロナ放電により帯電を施す。Here, if the photoreceptor 1 is Se-based, the charger 2 charges it by positive corona discharge.
また、トナーの極性は、転写前に何も処理を受けなけれ
ば負であるので、転写器５の極性は正となる。従って、
帯電器２と転写器５に対して高圧電源の同一出力端より
給電することができ、その等価回路は大略第３図のよう
に表わすことができる。Furthermore, since the polarity of the toner is negative unless it undergoes any treatment before transfer, the polarity of the transfer device 5 is positive. Therefore,
Power can be supplied to the charger 2 and the transfer device 5 from the same output end of a high voltage power source, and the equivalent circuit thereof can be roughly represented as shown in FIG.
第３図において、高圧電源１１から帯電器１２．１３に
それぞれ電流Ｉ、、Ｉ２を供給したとき、■が一定であ
れば、
Ｔ、： ｌ２＝Ｒ２： Ｒ□
と表わせる。よって、Ｒユ、Ｒ２を適当に選択すること
によって帯電、転写に必要な放電電流を得ることができ
る。In FIG. 3, when currents I, I2 are supplied from the high-voltage power supply 11 to the chargers 12 and 13, if ■ is constant, it can be expressed as T: l2=R2: R□. Therefore, by appropriately selecting R and R2, the discharge current necessary for charging and transfer can be obtained.
第１図は、本発明の具体的な一実施例を示したもので、
１４を帯電器、１５を転写器とすると、電流計１６．１
７に流れる電流がそれぞれ帯電、転写に寄 １
与すると考えることができる。そこで、帯電、転写に必
要な１１１１．２を得るために可変抵抗器１８．１９゜
２０をそれぞれ調整する。基本的にはそれぞれの放電系
の抵抗がわかっていれば、トータル電流がその抵抗比に
分割されるので、必要ならば可変抵抗器２０の調整だけ
でよい。FIG. 1 shows a specific embodiment of the present invention.
If 14 is a charger and 15 is a transfer device, the ammeter 16.1
The current flowing through 7 contributes to charging and transfer, respectively.
You can think of it as giving. Therefore, the variable resistors 18, 19 and 20 are adjusted respectively to obtain the voltage of 1111.2 required for charging and transfer. Basically, if the resistance of each discharge system is known, the total current can be divided into the resistance ratio, so it is only necessary to adjust the variable resistor 20 if necessary.
ところで、帯電器と転写器に同一電源出力端から給電す
る場合に問題となるのは、画像領域の帯電が終了しても
転写器との位置関係による時間差により、少なくとも転
写が終了するまで帯電器の放電は継続されなければなら
ないことである。この場合、感光体では非画像領域に対
応するので露光はなく、従って感光体は全面に帯電され
、現像されるので、トナーの消費量の増大、クリーニン
グ器の過負荷と悪影響を及ぼすことになる。これに対し
、帯電器１４としてグリッド２１を備えたものを使用し
、そのグリッドに、電源２２を所定の信号で制御して、
非画像領域において１１がほとんど流れないような電位
を与えることにより解決できる。By the way, there is a problem when power is supplied to the charger and the transfer device from the same power supply output terminal.Even after the charging of the image area is finished, there is a time difference due to the positional relationship with the transfer device, so the charger does not have to supply power at least until the transfer is finished. The discharge must continue. In this case, since the photoreceptor corresponds to a non-image area, there is no exposure, and the entire surface of the photoreceptor is charged and developed, resulting in an increase in toner consumption and overloading of the cleaning device. . In contrast, a charger 14 equipped with a grid 21 is used, and a power supply 22 is controlled by a predetermined signal to the grid.
This problem can be solved by applying a potential such that 11 hardly flows in the non-image area.
（効 果）
以上説明したように、本発明によれば、高圧電源の同一
出力端から複数の帯電器に対して並列給電することによ
り、高圧電源の小形化を図ることができるとともに、制
御系等の簡素化が可能にな−ζ −
リ、トータルコストを大幅に低減することができる。(Effects) As explained above, according to the present invention, by supplying power in parallel to a plurality of chargers from the same output terminal of a high-voltage power supply, it is possible to downsize the high-voltage power supply, and also to improve the control system. etc., the total cost can be significantly reduced.
第１図は、本発明の一実施例の構成を示す回路図、第２
図は、電子写真装置の要部の構成図、第３図は、１つの
電源に２つの帯電器を並列接続したときの等価回路図で
ある。
１・・・感光体、 ２，１４・・・帯電器、 ３・・・
露光器、４・・・現像器、 ５，１５・・・転写器、６
・・・分離器、７・・・クリーニング器、８・・・除電
器、 ９ ・・・用紙、１１・・・高圧電源、２１ ・
・・ グリッド。
特許出願人 株式会社 リ コー
櫓 フ 諦
りｐ −し−FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, and FIG.
This figure is a block diagram of the main parts of the electrophotographic apparatus, and FIG. 3 is an equivalent circuit diagram when two chargers are connected in parallel to one power source. 1... Photoreceptor, 2,14... Charger, 3...
Exposure device, 4... Developing device, 5, 15... Transfer device, 6
...Separator, 7..Cleaning device, 8..Static eliminator, 9..Paper, 11..High voltage power supply, 21.
... Grid. Patent applicant Rico Yagura Co., Ltd.
Claims (4)
に複数の帯電器が並列接続され、同時給電されることを
特徴とするコロナ帯電装置。(1) In an electrophotographic apparatus, a corona charging device characterized in that a plurality of chargers are connected in parallel to one output end of a high-voltage power source and are simultaneously supplied with power.
帯電器であることを特徴とする特許請求の範囲第（１）
項記載のコロナ帯電装置。(2) Claim (1) characterized in that at least one of the chargers is a charger equipped with a grid.
The corona charging device described in Section 1.
れることを特徴とする特許請求の範囲第（２）項記載の
コロナ帯電装置。(3) The corona charging device according to claim (2), wherein the potential of the grid is controlled by a predetermined signal.
を介して接続されていることを特徴とする特許請求の範
囲第（１）項記載のコロナ帯電装置。(4) The corona charging device according to claim (1), wherein the high-voltage power source and each charger are connected via variable resistors, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25643884A JPS61134773A (en) | 1984-12-06 | 1984-12-06 | Corona charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25643884A JPS61134773A (en) | 1984-12-06 | 1984-12-06 | Corona charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61134773A true JPS61134773A (en) | 1986-06-21 |
Family
ID=17292660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25643884A Pending JPS61134773A (en) | 1984-12-06 | 1984-12-06 | Corona charging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61134773A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0345033A2 (en) * | 1988-05-31 | 1989-12-06 | Sharp Kabushiki Kaisha | Image forming apparatus |
-
1984
- 1984-12-06 JP JP25643884A patent/JPS61134773A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0345033A2 (en) * | 1988-05-31 | 1989-12-06 | Sharp Kabushiki Kaisha | Image forming apparatus |
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