JPH0277774A - Destaticizer for electrophotographic device - Google Patents
Destaticizer for electrophotographic deviceInfo
- Publication number
- JPH0277774A JPH0277774A JP23051388A JP23051388A JPH0277774A JP H0277774 A JPH0277774 A JP H0277774A JP 23051388 A JP23051388 A JP 23051388A JP 23051388 A JP23051388 A JP 23051388A JP H0277774 A JPH0277774 A JP H0277774A
- Authority
- JP
- Japan
- Prior art keywords
- transfer material
- photosensitive body
- transfer
- separated
- destaticizer
- 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
- 239000000463 material Substances 0.000 claims abstract description 37
- 230000003068 static effect Effects 0.000 claims description 18
- 108091008695 photoreceptors Proteins 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- -1 Del-11 Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［発明の利用分野〕
本発明は、電子写真装置の除電装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a static eliminator for an electrophotographic apparatus.
［発明の背景〕
＠３図に示すように、一般に電子写真装置は、感光体４
ヒに形成さｔ［た静電潜像上に、現像部でトリー一を何
着させ可視化する。この可視化されたトナー像は、転写
装置により転写材７をトナーと逆極性に帯電させ、転写
材７に転写される。この時、転写材７は帯電するため感
光体４の接地部材５に転写材７と逆極性で同動の電荷か
誘起さ′７ｒ１クーロンカにより感光体４と密着する。[Background of the Invention] As shown in Figure @3, an electrophotographic apparatus generally has a photoreceptor 4.
A number of trees are deposited on the electrostatic latent image formed in the developing section to visualize it. This visualized toner image is transferred onto the transfer material 7 by charging the transfer material 7 with a polarity opposite to that of the toner using a transfer device. At this time, since the transfer material 7 is charged, a charge having the opposite polarity and the same movement as that of the transfer material 7 is induced on the grounding member 5 of the photoreceptor 4, and it comes into close contact with the photoreceptor 4 due to the coulomb force '7r1.
転写材７と感光体４は、クーロンカで密着しているので
、転写材７の持つ電荷を小さくすオｌば、密着力が低下
し感光体４よね分離することができる。この転写材７の
電荷を小さくするため除電装置に交流又は直流電流を流
し、ＡＣ又はＤＣコロナを転写材７１ζ与え転写材７を
除電する。密名−カ低下後、転写イ′Ａ７は定着装置２
への転写材搬送装置８の吸引部で吸いヒげら第１、搬送
ベルトにより定着装置に送られる。、９はシールドケー
スである。Since the transfer material 7 and the photoreceptor 4 are in close contact with each other due to coulomb force, if the electric charge of the transfer material 7 is reduced, the adhesion force is reduced and the photoreceptor 4 can be separated. In order to reduce the electric charge on the transfer material 7, an AC or DC current is passed through the static eliminator, and an AC or DC corona is applied to the transfer material 71ζ to eliminate the static electricity on the transfer material 7. After the power decreases, the transfer point A7 is transferred to the fixing device 2.
The transfer material is first sucked by the suction section of the transfer material conveying device 8 and sent to the fixing device by the conveying belt. , 9 is a shield case.
従来一般に用いられている除電装置の欠点を下記に示す
。The drawbacks of conventional static eliminators commonly used are shown below.
装置の小型化のために、転写材搬送装置８と除電装置の
間隔が挟まり、また、低コスト化のために除電装置のフ
ロトロンワイヤー６と感光体４とのＧａｐ狭めることに
より除電効率を向ヒさせ、電源容量を少なくする傾向に
ある。このことにより、感光体４から転写材７の分離後
、転写材７は除電装置より発生するコロナをあび、転写
材７からトナーか脱落する。また、トナー像がぼける等
の画角低下をまねく。In order to miniaturize the device, the gap between the transfer material conveying device 8 and the static eliminator is narrowed, and to reduce costs, the gap between the Flotron wire 6 of the static eliminator and the photoreceptor 4 is narrowed to improve static elimination efficiency. This tends to increase the power supply capacity and reduce the power supply capacity. As a result, after the transfer material 7 is separated from the photoconductor 4, the transfer material 7 is exposed to corona generated by the static eliminator, and toner falls off from the transfer material 7. Moreover, this causes a decrease in the angle of view, such as blurring of the toner image.
装置の小型化、低価格化を実現でき、かつ画質の低下を
まねかないで、安定に転写材７を感光体４から分離でき
る除電装置の開発が望まオ１丁いた〔発明の目的〕
本発明は、Ｌ記の欠点を除去し一装置の小型化、低価格
化を実現でき、かつ画質の低下をまねかない、安定？こ
転写材を感光体から分離できる除電装置を提供すること
を目的とする。It would be desirable to develop a static eliminator that can reduce the size and cost of the device and stably separate the transfer material 7 from the photoreceptor 4 without deteriorating the image quality. [Object of the Invention] The present invention Is it possible to eliminate the drawbacks listed in item L, make the device smaller and lower in price, and do not cause any deterioration in image quality and is stable? It is an object of the present invention to provide a static eliminator that can separate this transfer material from a photoreceptor.
除電装置１ごよるトナー像の脱落及びト十−像のボケは
一感光体から転写材が分離した後発生し、転写材が感光
体トに密着している場合には発生しない。このことから
転写材が除電コロトロンの近くを通り・コロナを浴びる
ことにより発生しており、感光体から転写材か分割する
ポイント以降に遮蔽部材を設け、除電装置のコロナが転
写材ｌど与えられないように工夫したものである。The dropping of the toner image and the blurring of the toner image caused by the static eliminator 1 occur after the transfer material is separated from the photoconductor, but do not occur when the transfer material is in close contact with the photoconductor. This is because the transfer material passes near the static eliminating corotron and is exposed to corona, so a shielding member is installed after the point where the transfer material is separated from the photoreceptor, and the corona of the static eliminating device is applied to the transfer material. We have devised a way to avoid this.
本発明の実施例を第１図に示す。除電装置は、コロトロ
ンワイヤ６、シールドケース？、コロトロンワイヤ６に
′市川を印加するための高圧電源１、本発明なる遮蔽部
材６とて構成さオンる。遮蔽部４チロの先對１１．；は
、感光体４から転写拐７か分離するポイントＡとコロト
ロンワイヤ３とを結ぶ線ヒにあるのが最適である。また
遮蔽部利６の材料としては、金属（アルミ、鉄等）、高
分子利料（ベークライト、デル１１ン、マイラー等）の
とちらでも使用可能であるか、電諒容量の低下のために
は高分子材料の方が適している。また取付角度は一転写
材の除電効率を高めるため感光体側に開口し７ている力
か望ましい。An embodiment of the invention is shown in FIG. Is the static eliminator a Corotron wire 6 and a shield case? , a high-voltage power supply 1 for applying a voltage to the corotron wire 6, and a shielding member 6 according to the present invention. Ahead of shielding part 4 11. is optimally located at a line connecting the corotron wire 3 and a point A where the transfer wire 7 is separated from the photoreceptor 4. In addition, as the material for the shielding part 6, either metal (aluminum, iron, etc.) or polymer material (Bakelite, Del-11, Mylar, etc.) can be used, or because of the reduction in electrical capacity. Polymer materials are more suitable. In addition, the mounting angle is preferably such that the opening faces the photoreceptor side in order to increase the efficiency of static elimination of the transfer material.
本発明の変形例と１．て、第２図のよう１ご−コロトロ
ンワイヤを２本もつ除電装置にｂいｒ−転写ｖＪ７の流
れの上流Ｉごあるに流フロトロンワイヤ１１が、下流に
ある下流コロトロンワイヤ１０よりも、シールドケース
９の板背面に対して距離をとるものも同一効果を達成し
得る。Modifications of the present invention and 1. As shown in FIG. 2, in a static eliminator having two corotron wires, the flow corotron wire 11 located upstream of the flow of the br-transfer vJ7 is connected to the downstream corotron wire 10 located downstream. The same effect can also be achieved by providing a distance from the back of the plate of the shield case 9.
第１図は本発明の除電装置の縦断面図、第２図は本発明
の変形例の縦断面図である。第３図は従来例を示す縦断
面図である。
図において、１は高圧電源、２は転写装置、６はコロト
ロンワイヤ、４は感光体、５は接地部材、６は遮蔽部材
、７は転写材、８は転与利搬送装置−９はシールドケー
ス、１〔］は下流コロトロンワイヤー１１は辷流コロト
ロンワイヤ。FIG. 1 is a longitudinal cross-sectional view of a static eliminator according to the present invention, and FIG. 2 is a longitudinal cross-sectional view of a modification of the present invention. FIG. 3 is a longitudinal sectional view showing a conventional example. In the figure, 1 is a high voltage power supply, 2 is a transfer device, 6 is a corotron wire, 4 is a photoreceptor, 5 is a grounding member, 6 is a shielding member, 7 is a transfer material, 8 is a transfer and transfer device, and 9 is a shield In case 1 [], the downstream corotron wire 11 is a flow corotron wire.
Claims (1)
ロナ放電により転写材の除電を行ない感光体から転写材
を分離する除電装置において、転写材が感光体から分離
後、除電装置から発生するコロナを転写材に与えないよ
うに遮蔽部材を設けたことを特徴とする除電装置。After the electrostatic latent image formed on the photoconductor is transferred to the transfer device, the charge removal device removes the charge from the transfer material by corona discharge and separates the transfer material from the photoconductor. A static eliminator comprising a shielding member to prevent corona generated from the transfer material from being applied to the transfer material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23051388A JPH0277774A (en) | 1988-09-14 | 1988-09-14 | Destaticizer for electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23051388A JPH0277774A (en) | 1988-09-14 | 1988-09-14 | Destaticizer for electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0277774A true JPH0277774A (en) | 1990-03-16 |
Family
ID=16908930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23051388A Pending JPH0277774A (en) | 1988-09-14 | 1988-09-14 | Destaticizer for electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0277774A (en) |
-
1988
- 1988-09-14 JP JP23051388A patent/JPH0277774A/en active Pending
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