JPS60107050A - Electrifying device - Google Patents

Electrifying device

Info

Publication number
JPS60107050A
JPS60107050A JP21443383A JP21443383A JPS60107050A JP S60107050 A JPS60107050 A JP S60107050A JP 21443383 A JP21443383 A JP 21443383A JP 21443383 A JP21443383 A JP 21443383A JP S60107050 A JPS60107050 A JP S60107050A
Authority
JP
Japan
Prior art keywords
photosensitive material
grid
voltage
potential
scorotron
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
Application number
JP21443383A
Other languages
Japanese (ja)
Inventor
Takayuki Tsutsui
筒井　高幸
Masao Majima
真島　政雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP21443383A priority Critical patent/JPS60107050A/en
Publication of JPS60107050A publication Critical patent/JPS60107050A/en
Pending legal-status Critical Current

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
    • G03G15/0266—Arrangements for controlling the amount of charge
    • 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

PURPOSE:To suppress a potential variation on a photosensitive material, and to prevent deterioration of the photosensitive material by raising gradually a voltage applied to a grid as it goes toward an outlet from an inlet of a scorotron, and controlling the applied voltage basing on at least one grid current. CONSTITUTION:When electrostatically charging a photosensitive material 1 using a belt, etc., a DC high voltage of about -5.6kV is applied to a corona wire 6 from a high voltage power source 3, also -700V is applied to a wire group #1 of a grid 8, and that which has divided a voltage of -Vg/(n-1) by resistances of R1-R(n-1) is applied to each group of #2-#n. When the voltage is applied in this way, the surface potential of the photosensitive material 1 becomes a gentle potential variation toward an outlet side from an inlet side of an electrostatic charger. By this characteristic, a potential variation and deterioration of the photosensitive material can be prevented.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は感光材上の電位の変動を抑制するとともに感光
材の劣化を防止し、かつ、感光材電位を適確に制御する
ためにスコロトロンのグリッドに対する電圧印加を感光
材がスコロトロンの入側から出側に向かうにつれて除々
に高くし、かつ、少なくとも１つのグリッドワイヤのグ
リッド電流レベルに基いて前記印加電圧を制御するよう
にした帯電装置に関する。Detailed Description of the Invention [Technical Field] The present invention provides a method for controlling the grid of a scorotron in order to suppress fluctuations in potential on a photosensitive material, prevent deterioration of the photosensitive material, and accurately control the potential of the photosensitive material. The present invention relates to a charging device in which the applied voltage is gradually increased as the photosensitive material moves from the inlet side to the outlet side of the scorotron, and the applied voltage is controlled based on the grid current level of at least one grid wire.

〔従来技術〕[Prior art]

従来の帯電装置として、例えば、第１図に示すものがあ
る。この帯電装置は、感光材１の光導電層にある極性の
電荷をコロナ放電によって均一に生じさせるコロトロン
２と、コロトロン２に直流高電圧を印加する高圧電源３
と、コロトロン２に付属してスコロトロンを形成するグ
リッド４（図示省略しであるが、複数のグリッド電極を
有する）と、グリッド４にグリ、ド電圧を印加するグリ
、ド電源５とよシ構成される。As a conventional charging device, there is one shown in FIG. 1, for example. This charging device includes a corotron 2 that uniformly generates polar charges on the photoconductive layer of the photosensitive material 1 by corona discharge, and a high voltage power source 3 that applies a high DC voltage to the corotron 2.
, a grid 4 that is attached to the corotron 2 and forms a scorotron (not shown, but has a plurality of grid electrodes), and a grid and power source 5 that applies a voltage to the grid 4. be done.

以上の構成において、静電記録装置等で光学手段により
て感光材１の表面に静電潜像を形成するに際しては、予
め感光材面を帯電する必要がおるが、この帯電はコロト
ロン２に高圧電源３によって高電圧を印加すると共に、
バイアス電圧としてグリッド４にグリッド電圧金グリッ
ド電源５によ２て印加する。この場合、グリッド４を構
成する各グリッド電極には同一電圧値が印加される。以
上により感光材１にはグリ。In the above configuration, when forming an electrostatic latent image on the surface of the photosensitive material 1 using optical means in an electrostatic recording device or the like, it is necessary to charge the surface of the photosensitive material 1 in advance. While applying a high voltage by the power source 3,
A grid voltage is applied to the grid 4 as a bias voltage by a gold grid power supply 5 2 . In this case, the same voltage value is applied to each grid electrode making up the grid 4. As a result of the above, the photosensitive material 1 is left blank.

ド電圧と等しい表面電位が形成される。A surface potential equal to the ground voltage is formed.

しかし、従来の帯電装置にあっては、複数のグリッド電
極の各々に同一電圧が印加されているため、感光材上の
電位がグリ、ドバイアス電圧に近い値にならなければ、
グリッドによるコロナ放電によるイオンを制御すること
ができない。そのため、感光材がスコロトロンに入った
直後の電位は低いためグリッド電圧の差が大きく、従っ
て、感光材上の電位が変動するとともに、コロナ電圧、
グリッド電圧等を大きく変化させるか、あるいは感光材
１とグリ、ドの距離を変えねばならない不都合がおる。However, in conventional charging devices, the same voltage is applied to each of a plurality of grid electrodes, so unless the potential on the photosensitive material reaches a value close to the negative bias voltage,
Ions due to corona discharge by the grid cannot be controlled. Therefore, the potential immediately after the photosensitive material enters the scorotron is low, so the difference in grid voltage is large. Therefore, the potential on the photosensitive material fluctuates, and the corona voltage and
There is an inconvenience in that it is necessary to greatly change the grid voltage or the like, or to change the distance between the photosensitive material 1 and the grids and gates.

また、感光材１はスコロトロンに入ると直ぐにその電位
を急激に上昇させる結果となるため、感光材の帯′酸性
や暗減衰全早め、感光材の劣化を招く恐れがある。Further, as soon as the photosensitive material 1 enters the scorotron, its potential is rapidly increased, which may lead to acidification of the photosensitive material, premature dark decay, and deterioration of the photosensitive material.

〔発明の目的および構成〕[Object and structure of the invention]

本発明は、上記に鑑みてなされたものであり、感光材上
の電位変動の抑制と感光材の劣化防止を図るため、感光
材がスコロトロンの入側から出側に向かうにつれてスコ
ロトロンのグリッドへの電圧印加を除々に高め、かつ、
少くとも１つのグリッドワイヤのグリッド電流レベルに
基いて前記電圧印加を制御するようにした帯電装置を提
供するものである。The present invention has been made in view of the above, and in order to suppress potential fluctuations on the photosensitive material and prevent deterioration of the photosensitive material, as the photosensitive material moves from the input side of the scorotron to the exit side, it is applied to the grid of the scorotron. Gradually increase the voltage application, and
A charging device is provided in which the voltage application is controlled based on a grid current level of at least one grid wire.

〔実施例〕〔Example〕

以下、本発明による帯電装置違詳細に説明する。 Hereinafter, the charging device according to the present invention will be explained in detail.

第２図は本発明の一実施例を示すものでおり、第１図１
ｃ示したのと同一の部分は同一の引用数字で示したので
重複する説明は省略するが、細線（例えば、６０μφ）
を用いたコロナワイヤ６、コロナワイヤ６と感光材ｌと
の間に感光材１の進行方向に一定間隔で配設した複数の
グリッドワイヤ７によって構成されるグリッド８、グリ
ッド′８及びコロナワイヤ６を遮へいするシールド９及
びコロナ放電による電荷を効率良く感光材１側に流すべ
くシールド９の内壁に装着される絶縁材１０の各々を備
えたスコロ）ｏン１１と、ナ１〜＋１１にグループ分け
されたグリッドワイヤ７のグルーブナ２〜すｎにグリッ
ド電源５の出力電圧を分圧印加するための（ｎ−１）個
の抵抗１２と、グリッドワイヤ７のグループ＋ｉ（感光
材出側方向端ワイヤ）とグリッド電源５との間に接続さ
れてグリッド電流の検出に用いられる抵抗１３とを設け
た構成を有する。FIG. 2 shows an embodiment of the present invention, and FIG.
The same parts as shown in c are shown with the same quotation numerals, so redundant explanation will be omitted, but thin lines (for example, 60μφ)
A grid 8 constituted by a plurality of grid wires 7 arranged at regular intervals in the traveling direction of the photosensitive material 1 between the corona wire 6 and the photosensitive material 1, a grid '8, and the corona wire 6. A shield 9 for shielding the photosensitive material 1 and an insulating material 10 attached to the inner wall of the shield 9 to efficiently flow charges due to corona discharge to the photosensitive material 1. (n-1) resistors 12 for applying a divided voltage of the output voltage of the grid power source 5 to the groovers 2 to n of the grid wire 7, and group +i of the grid wires 7 (the end wires in the photosensitive material exit direction). ) and a resistor 13 connected between the grid power source 5 and used for detecting the grid current.

まｆＬ、こりグリッド電流のレベルに基いて感光材表面
電位をチェックするだめの電位チェ、り回路１４が抵抗
１３の両端に接続され、グリッド電流によって生じる抵
抗１３の電圧降下から感光材表面電位を算出する。A potential check circuit 14 is connected across the resistor 13 to check the surface potential of the photosensitive material based on the level of the grid current, and detects the surface potential of the photosensitive material from the voltage drop across the resistor 13 caused by the grid current. calculate.

感光材１の表面電位が、例えば、＋ｎのグリッドワイヤ
グループの直下でＯｖｌ　す１の直下で一５００Ｖにな
るようにするとすれば、グリッド電源５の出力電圧は一
７００ｖに設定され、また、抵抗１２０Ｒ１〜Ｈ（ｎ−
１）は総て１００にΩにされる。さらにグリッドワイヤ
７の本数としては、例えば、２０本が用いられ、また、
高圧電源３は定電流タイプが用いられ、例えば−３００
μ人の一定電流が流されると共に−５，６ｋＶの電圧が
出力される。For example, if the surface potential of the photosensitive material 1 is set to -500V directly below the +n grid wire group and immediately below the Ovl 1, the output voltage of the grid power supply 5 is set to -700V, and the resistor 120R1~H(n-
1) are all set to 100Ω. Furthermore, the number of grid wires 7 used is, for example, 20, and
The high voltage power supply 3 is a constant current type, for example -300
A constant current of μ is applied and a voltage of -5.6 kV is output.

以上の構成において、ベルト等を用いた感光材１を帯電
するに際し、コロナワイヤ６に高圧電源３より−５，６
ｋＶ程度の直流高電圧が印加されると共に、グリッド８
のワイヤグループ≠１に一７００Ｖが印加され、ナ２〜
＋ｎの各グループには−Ｖｇ／’（ｎ−１）の電圧がＲ
１−Ｒ（ｎ−１）の抵抗により分圧したものが印加され
る。In the above configuration, when charging the photosensitive material 1 using a belt or the like, the corona wire 6 is supplied with -5, 6
A DC high voltage of about kV is applied, and the grid 8
-700V is applied to wire group≠1, and
Each group of +n has a voltage of -Vg/'(n-1) R
A voltage divided by a resistor of 1-R(n-1) is applied.

（−Ｖ−グリッド′成源５の出力）。このような′電圧
印加により、感光材１の表面電位は、第３図に示すよう
に、￥＃電器の入口側から出口側に向かって緩やかな電
位変化となる。このような特性によシ、従来、感光材上
の電位を急激に上昇させたことに起因して生じた感光材
の電位変動と劣化を防ぐことができる。発明者等の検討
によ叱、感光材の電気的劣化を従来つＩＡにできること
が確認され友。−また、定電流型の高圧電源を用いるこ
とによシ、周囲環境の温湿度変化において安定し友出力
電圧の得られることが確認された。(-V-grid' output of source 5). By applying such a voltage, the surface potential of the photosensitive material 1 changes gradually from the inlet side to the outlet side of the appliance, as shown in FIG. Such characteristics can prevent potential fluctuations and deterioration of the photosensitive material, which conventionally occur due to a sudden increase in the potential on the photosensitive material. After research by the inventors, it was confirmed that electrical deterioration of photosensitive materials can be prevented by IA instead of conventional methods. - It was also confirmed that by using a constant current type high-voltage power supply, a stable output voltage could be obtained despite changes in temperature and humidity in the surrounding environment.

スコロトロンによって帯電が行なわれたベルト（又はド
ラム）による感光材１は光学像による露光位置に搬送さ
れ、ここで静電潜像が形成されたのち、トナーによる現
像が行なわれ、ついで転写；ロトロンによシ普通紙に転
写された後に定着が行なわれる。転写が終了した゛感光
材１は表面に付着している残留トナーがクリーナによっ
て除去されたのち再びスコロトロンによシ帯電が行なわ
れ、前述の処理がくり返される。The photosensitive material 1 is transported by a belt (or drum) charged by a scorotron to an exposure position with an optical image, where an electrostatic latent image is formed, developed with toner, and then transferred; transferred to a rotron. After being transferred to plain paper, fixing is performed. After the transfer has been completed, residual toner adhering to the surface of the photosensitive material 1 is removed by a cleaner, and then the scorotron is used to charge the photosensitive material 1 again, and the above-described process is repeated.

なお、帯電電位の制御は、抵抗１３の端子電圧を電位チ
ェック回路１４によシ検知して感光和紘譜ｌｌｍ３しこ
向雇埴Ｈ韮しながらグリッド電源５の出力電圧を調整し
、所望の感光材電位に制御する。The charging potential is controlled by detecting the terminal voltage of the resistor 13 by the potential check circuit 14 and adjusting the output voltage of the grid power supply 5 while checking the exposure to the desired exposure. Control material potential.

また、グリッドワイヤの本数が少ない場合にはグループ
分けをせずとも良いし、本数が多い場合でも分圧数を増
やせるならグループ分けの必要はない。Furthermore, if the number of grid wires is small, there is no need to group them, and even if there are many grid wires, there is no need to group them if the number of partial voltages can be increased.

〔発明の効果〕〔Effect of the invention〕

以上説明しに通シ、本発明の帯電装置によれば、グリッ
ドを構成する複数のワイヤをグループ化し、これらに対
する電圧を帯電器入側よシ出側に向かって段階的に高く
なるように印加し、かつ、少なくとも１つのグリッドワ
イヤのグリッド電流に応じてグリッド電圧を制御するよ
うにしたため、感光材の電気的劣化を抑制し、電位ム−
）を抑えることができる。’！ｆｃ、グリッド電流の変
化から感光材電位を検知できるようにしたため、グリッ
ド電圧のわずかな変化に対して本感光材電位の制御を精
度良く行なうことがで断る。As explained above, according to the charging device of the present invention, a plurality of wires constituting a grid are grouped, and a voltage is applied to these wires so that the voltage increases stepwise from the charger input side to the output side. Moreover, since the grid voltage is controlled according to the grid current of at least one grid wire, electrical deterioration of the photosensitive material is suppressed and the potential shift is suppressed.
) can be suppressed. '! fc, since the photosensitive material potential can be detected from changes in the grid current, it is difficult to accurately control the photosensitive material potential even with slight changes in the grid voltage.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の帯電装置の構成図、第２図は本発明の一
実施例の構成図、第３図は本発明により得られる感光材
電位特性図。 符号の説明 １・・・感光材、　３・・・高圧電源、　６・・・コロ
ナワイヤ、７・・・グリッドワイヤ、８・・・グリッド
、９・・・シールド、１０・・・絶縁材、１１・・・ス
コロトロン、１２．１３・・・抵抗、１４・・・電位チ
ェック回路。 特お゛出願人　富士ゼロックス株式会社代理人　弁理士
　松　原　伸　２ 同　弁理士　村　木　清　旬 間　弁理士　平　１）　忠　雄 同　弁理士　上　島　淳　− 同　弁理士　鈴　木　均 第１図 第２図 第３図FIG. 1 is a block diagram of a conventional charging device, FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a diagram of potential characteristics of a photosensitive material obtained by the present invention. Explanation of symbols 1... Photosensitive material, 3... High voltage power supply, 6... Corona wire, 7... Grid wire, 8... Grid, 9... Shield, 10... Insulating material, 11... Scorotron, 12.13... Resistor, 14... Potential check circuit. Special Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Shin Matsuhara 2 Patent Attorney Kiyoshi Muraki Patent Attorney Hei 1) Yudo Tadashi Patent Attorney Atsushi Ueshima - Patent Attorney Hitoshi Suzuki Figure 1 Figure 2 Figure 3

Claims (1)

【特許請求の範囲】 シールド内に配設されたコロナワイヤ及び該ワイヤの感
光材側に該感光材の進行方向に所定の間隔で配設される
複数のグリッドワイヤよりなるグリッドを備えたスコロ
トロンよ構成る帯電装置において、 感光材の進行方向において前記スコロトロンの入側から
出側に向かってレベルが高くなる分電圧を前記複数のグ
リッドワイヤに与える分電圧手段と、 前記複数のグリッドワイヤの少なくとも１つのグリ、ド
ヮイヤのグリッド電流を検出してその電流レベルに基い
て前記分電圧を制御する制御手段とから構成されること
を特徴とする帯電圧装置。[Claims] A scorotron comprising a corona wire disposed within a shield and a grid made of a plurality of grid wires disposed on the photosensitive material side of the wire at predetermined intervals in the direction of travel of the photosensitive material. The charging device comprises: voltage dividing means for applying to the plurality of grid wires a voltage whose level increases from the inlet side to the outlet side of the scorotron in the traveling direction of the photosensitive material; and at least one of the plurality of grid wires. 1. A voltage charging device comprising: a control means for detecting a grid current of two grids and a driver and controlling the divided voltage based on the current level.
JP21443383A 1983-11-15 1983-11-15 Electrifying device Pending JPS60107050A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21443383A JPS60107050A (en) 1983-11-15 1983-11-15 Electrifying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21443383A JPS60107050A (en) 1983-11-15 1983-11-15 Electrifying device

Publications (1)

Publication Number Publication Date
JPS60107050A true JPS60107050A (en) 1985-06-12

Family

ID=16655699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21443383A Pending JPS60107050A (en) 1983-11-15 1983-11-15 Electrifying device

Country Status (1)

Country Link
JP (1) JPS60107050A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55358A (en) * 1979-03-12 1980-01-05 Nippon Zeon Co Ltd Production of unsaturated carboxylic acid
JPS55130549A (en) * 1979-03-30 1980-10-09 Ricoh Co Ltd Electrophotographic method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55358A (en) * 1979-03-12 1980-01-05 Nippon Zeon Co Ltd Production of unsaturated carboxylic acid
JPS55130549A (en) * 1979-03-30 1980-10-09 Ricoh Co Ltd Electrophotographic method

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