JPH0830074A - Cleaning device for electrifying brush and image forming device - Google Patents

Cleaning device for electrifying brush and image forming device

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Publication number
JPH0830074A
JPH0830074A JP16771694A JP16771694A JPH0830074A JP H0830074 A JPH0830074 A JP H0830074A JP 16771694 A JP16771694 A JP 16771694A JP 16771694 A JP16771694 A JP 16771694A JP H0830074 A JPH0830074 A JP H0830074A
Authority
JP
Japan
Prior art keywords
brush
charging
electrifying
vibration
image forming
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
JP16771694A
Other languages
Japanese (ja)
Inventor
Junichi Kishi
淳一 岸
Hironori Uematsu
弘規 植松
Ko Kitamura
航 北村
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP16771694A priority Critical patent/JPH0830074A/en
Publication of JPH0830074A publication Critical patent/JPH0830074A/en
Pending legal-status Critical Current

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  • Cleaning In Electrography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

PURPOSE:To provide a cleaning device for an electrifying device and an image forming device capable of securing high potential stability at the time of electrification by preventing toner impalpable powder from adhering to an electrifying brush and obtaining a high-quality image by restraining faulty electrification and irregular electrification caused by the contamination of the electrifying brush. CONSTITUTION:This cleaning device for the electrifying brush 2A is constituted of a vibration imparting device 8 imparting vibration to the electrifying brush 2A of a brush electrifying device 2 to which comes into contact with and electrifies a photoreceptor 1. Then, the cleaning device 8 for the brush 2A is provided in the image forming device constituted by disposing processing means such as the brush electrifying device 2, an exposure device, a developing device 4 and a transfer device 5, etc., around the photoreceptor 1. Thus, vibration is imparted to the brush 2A by the vibration imparting device 8, so that the toner impalpable powder does not adhere to the brush 2A, and the faulty electrification and the irregular electrification caused by the contamination of the brush 2A are restrained, thereby stably obtaining the high-quality image.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、帯電ブラシのクリーニ
ング装置及びこれを用いた電子写真複写機、レーザービ
ームプリンター、ファクシミリ、ＣＲＴプリンター等の
画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging brush cleaning device and an image forming apparatus such as an electrophotographic copying machine, a laser beam printer, a facsimile, a CRT printer and the like.

【０００２】[0002]

【従来の技術】電子写真複写機、レーザービームプリン
ター、ファクシミリ、ＣＲＴプリンター、電子写真製版
システム等の電子写真応用分野に広く用いられる画像形
成装置においては、感光ドラム等の静電潜像担持体を帯
電装置によって帯電させ、この静電潜像担持体の帯電域
に画像露光して静電潜像を形成し、該静電潜像を現像し
て可視像とし、この可視像を転写材へ転写して定着して
いる。2. Description of the Related Art In an image forming apparatus widely used in electrophotographic application fields such as electrophotographic copying machines, laser beam printers, facsimiles, CRT printers and electrophotographic plate making systems, an electrostatic latent image carrier such as a photosensitive drum is used. The electrostatic latent image is charged by a charging device, imagewise exposed to the charged area of the electrostatic latent image carrier to form an electrostatic latent image, the electrostatic latent image is developed into a visible image, and the visible image is transferred. Transferred to and fixed.

【０００３】ところで、前記帯電装置としては種々のタ
イプのものが知られているが、大別すると、コロナ放電
を利用したコロナ帯電装置と帯電ブラシや帯電ローラー
等の接触帯電装置に分けられる。By the way, although various types of charging devices are known, they are roughly classified into a corona charging device utilizing corona discharge and a contact charging device such as a charging brush or a charging roller.

【０００４】而して、コロナ放電を利用したコロナ帯電
装置は、安定した帯電を行うことができるという利点を
有する反面、多量のオゾンの発生を伴い、このオゾンが
感光体の劣化を招いたり、人体に悪影響を及ぼすという
問題を有している。このため、オゾンの発生量がコロナ
帯電装置に比して著しく少ない接触帯電装置が注目され
てきつつある。The corona charging device using corona discharge has the advantage that stable charging can be performed, but on the other hand, a large amount of ozone is generated, and this ozone causes deterioration of the photoconductor. It has a problem of adversely affecting the human body. For this reason, contact charging devices, which generate much less ozone than corona charging devices, are drawing attention.

【０００５】中でも、ブラシ帯電装置、特に回転する感
光ドラムの表面に接触して該感光ドラムを帯電させる固
定型の帯電ブラシを有するブラシ帯電装置は、比較的構
造が簡単なものとして注目されている。即ち、このブラ
シ帯電装置は、多数の帯電ブラシ毛を植設した基布をア
ルミニウム等のバックプレートに接着剤等で固定して構
成され、その帯電ブラシ毛は感光ドラムの表面に接触し
ている。Among them, a brush charging device, particularly a brush charging device having a fixed charging brush that charges a surface of a rotating photosensitive drum to charge the photosensitive drum, is noted as having a relatively simple structure. . That is, this brush charging device is constructed by fixing a base cloth in which a large number of charging brush bristles are planted to a back plate made of aluminum or the like with an adhesive or the like, and the charging brush bristles are in contact with the surface of the photosensitive drum. .

【０００６】しかしながら、斯かるブラシ帯電装置には
次のような問題がある。However, such a brush charging device has the following problems.

【０００７】即ち、電子写真方式を採る画像形成装置に
おいては、現像装置等で本来の帯電極性に帯電するトナ
ー以外に、これとは逆極性に帯電するトナー粉が生成さ
れることがあり、このトナー粉が感光ドラムの表面に付
着し、この付着したトナー粉がクリーニング装置によっ
ても十分除去されない場合がある。又、トナー粉以外
に、感光ドラムの削れ粉、紙粉等がクリーニング装置で
十分除去されない場合がある。That is, in an electrophotographic image forming apparatus, in addition to the toner charged to the original charging polarity in the developing device or the like, toner powder charged to the opposite polarity may be generated. The toner powder may adhere to the surface of the photosensitive drum, and the adhered toner powder may not be sufficiently removed by the cleaning device. In addition to the toner powder, the cleaning device may not sufficiently remove the abrasion powder of the photosensitive drum, the paper powder, and the like.

【０００８】そして、上記トナー粉、感光ドラムの削れ
粉、紙粉等が帯電ブラシに付着すると、帯電不良が発生
し易くなり、延てはハケ筋状の画像濃淡ムラが発生する
という不具合があった。If the toner powder, the shavings of the photosensitive drum, the paper powder, or the like adheres to the charging brush, charging failure is likely to occur, and there is a problem in that a stripe-shaped uneven image density occurs. It was

【０００９】上記問題を解決する手段として、特公昭６
３−４３７５０号公報には、帯電時（画像形成時）には
帯電装置に感光ドラムの帯電極性と同極性の直流成分を
含む電圧を印加し、非帯電時（非画像形成時）には感光
ドラムの帯電極性と逆極性の直流成分を含む電圧を印加
し、これによって帯電装置に付着した微粉汚れを除去す
る技術が開示されている。As a means for solving the above problems, Japanese Examined Patent Publication No. 6
In Japanese Laid-Open Patent Publication No. 3-43750, a voltage including a DC component having the same polarity as the charging polarity of a photosensitive drum is applied to a charging device during charging (image formation), and when not charged (during image formation), it is exposed. A technique is disclosed in which a voltage including a DC component having a polarity opposite to the charging polarity of a drum is applied to remove fine powder stains attached to a charging device.

【００１０】[0010]

【発明が解決しようとする課題】しかしながら、上記従
来技術によれば、接触帯電装置に付着した微粉汚れを除
去するために、感光ドラム表面が本来の帯電極性とは逆
極性に帯電されることになり、そのときの逆極性の電荷
が感光ドラムの表面や内部に蓄積され、その結果、次の
画像形成に当たって感光ドラムを本来の極性に帯電させ
るときに逆極性の電荷と本来の帯電電荷とが打ち消し合
い、帯電電位の低下や帯電ムラが発生するという問題が
ある。However, according to the above-mentioned prior art, the surface of the photosensitive drum is charged to the opposite polarity to the original charging polarity in order to remove the fine powder dirt adhering to the contact charging device. The electric charges of opposite polarity at that time are accumulated on the surface or inside of the photosensitive drum, and as a result, when the photosensitive drum is charged to the original polarity in the next image formation, the electric charges of the opposite polarity and the original charged electric charges are generated. There is a problem that they cancel each other out, resulting in a decrease in charging potential and uneven charging.

【００１１】本発明は上記問題に鑑みてなされたもの
で、その目的とする処は、トナー微粉等の帯電ブラシへ
の付着を防いで、帯電時において高い電位安定性を確保
することができ、帯電ブラシの汚れによる帯電不良、帯
電ムラ等の発生を抑えて高品位な画像を得ることができ
る帯電ブラシのクリーニング装置及び画像形成装置を提
供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to prevent adhesion of fine toner powder or the like to a charging brush and to secure high potential stability during charging. An object of the present invention is to provide a charging brush cleaning device and an image forming apparatus capable of obtaining a high-quality image by suppressing the occurrence of charging failure and charging unevenness due to dirt on the charging brush.

【００１２】[0012]

【課題を解決するための手段】上記目的を達成するた
め、請求項１記載の発明は、感光体に接触してこれを帯
電させるブラシ帯電装置の帯電ブラシに振動を与える振
動付与装置によって帯電ブラシのクリーニング装置を構
成したことを特徴とする。In order to achieve the above object, the invention according to claim 1 uses a vibration imparting device that vibrates the charging brush of a brush charging device that contacts a photoreceptor and charges it. The cleaning device is configured.

【００１３】又、請求項２記載の発明は、感光体の周囲
にブラシ帯電装置、露光装置、現像装置、転写装置等の
プロセス手段を配設して成る画像形成装置において、前
記ブラシ帯電装置の帯電ブラシに振動を与える振動付与
装置によって構成されるクリーニング装置を設けたこと
を特徴とする。According to a second aspect of the present invention, in an image forming apparatus comprising process means such as a brush charging device, an exposure device, a developing device and a transfer device arranged around a photoconductor, the brush charging device is provided. A cleaning device configured by a vibration applying device that applies vibration to the charging brush is provided.

【００１４】更に、請求項３記載の発明は、請求項２記
載の発明において、前記帯電ブラシを、導電部材を分散
した人工繊維で構成したことを特徴とする。Further, the invention according to claim 3 is characterized in that, in the invention according to claim 2, the charging brush is made of an artificial fiber in which a conductive member is dispersed.

【００１５】[0015]

【作用】本発明によれば、振動付与装置によって帯電ブ
ラシに振動が与えられるため、トナー微粉等が帯電ブラ
シに付着することがなく、帯電時において高い電位安定
性を確保することができ、帯電ブラシの汚れによる帯電
不良、帯電ムラ等の発生を抑えてハケ筋状の画像濃淡ム
ラ等の無い高品位な画像を得ることができる。According to the present invention, since the charging brush is vibrated by the vibration imparting device, fine toner particles and the like do not adhere to the charging brush, and high potential stability can be ensured during charging. It is possible to obtain a high-quality image having no streak-shaped image density unevenness by suppressing the occurrence of charging failure, charging unevenness, etc. due to brush stains.

【００１６】[0016]

【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.

【００１７】＜実施例１＞図１は本発明に係る画像形成
装置要部の断面図である。<Embodiment 1> FIG. 1 is a sectional view of a main portion of an image forming apparatus according to the present invention.

【００１８】図において、１は不図示の装置本体によっ
て回転自在に支持された静電潜像担持体であるドラム状
の感光体であり、該感光体１の周囲にはプロセス手段と
してのブラシ帯電装置２、記録光３を発する不図示の露
光装置、現像装置４、転写装置５、クリーニング装置６
及び除電装置７が配設されている。In FIG. 1, reference numeral 1 denotes a drum-shaped photosensitive member which is an electrostatic latent image bearing member rotatably supported by an apparatus main body (not shown). Around the photosensitive member 1 is brush charging as a process means. Device 2, exposure device (not shown) that emits recording light 3, developing device 4, transfer device 5, cleaning device 6
And a static eliminator 7 is provided.

【００１９】ところで、前記感光体１は、アルミニウム
等の導電性基体の外周に、電荷発生層と電荷輸送層から
成る感光層を形成して構成されている。尚、この感光体
１は図示矢印ａ方向に所定の周速度で回転駆動される。The photoreceptor 1 is constructed by forming a photosensitive layer composed of a charge generation layer and a charge transport layer on the outer periphery of a conductive substrate such as aluminum. The photoconductor 1 is rotationally driven in the direction of arrow a at a predetermined peripheral speed.

【００２０】又、前記ブラシ帯電装置２は、感光体１に
当接してこれを所定の極性及び電位帯電させる帯電ブラ
シ２Ａで構成されており、該帯電ブラシ２Ａは、導電部
材であるカーボンブラックを分散させた太さ６デニー
ル、抵抗値１０3 Ω・ｃｍの人工繊維であるナイロン繊
維２−１を基布に密度１５，０００本／ｃｍ2 で植設
し、この基布を導電性接着剤によってバックプレート２
−２に接着して構成されている。そして、バックプレー
ト２−２には不図示の給電用接点が接触しており、この
接点を介して電源からの電圧がバックプレート２−２に
印加される。The brush charging device 2 is composed of a charging brush 2A that contacts the photoconductor 1 and charges the photoconductor 1 with a predetermined polarity and potential. The charging brush 2A is made of carbon black, which is a conductive member. Nylon fibers 2-1 that are dispersed artificial fibers having a thickness of 6 denier and a resistance value of 10 3 Ω · cm are planted on a base cloth at a density of 15,000 fibers / cm 2 , and the base cloth is a conductive adhesive. By back plate 2
It is configured by adhering to -2. An unillustrated power supply contact is in contact with the back plate 2-2, and a voltage from the power supply is applied to the back plate 2-2 via this contact.

【００２１】尚、上記帯電ブラシ２Ａを構成する人工繊
維としては、ナイロンの他、太さ１〜２０デニール、長
さ１〜１０ｍｍ、抵抗値１０2 〜１０9 Ω・ｃｍのアク
リル、レーヨン、ポリカーボネート、ポリエステル等が
用いられ、該人工繊維に分散される導電部材としては、
前記カーボンブラックの他、金属粉等が用いられる。そ
して、帯電ブラシ２Ａは、感光体１の表面に幅２〜２０
ｍｍ、圧接量（押し付け量）０．５〜５ｍｍで当接され
る。As the artificial fiber constituting the charging brush 2A, besides nylon, acrylic, rayon, polycarbonate having a thickness of 1 to 20 denier, a length of 1 to 10 mm and a resistance value of 10 2 to 10 9 Ω · cm are used. , A polyester or the like is used, and as the conductive member dispersed in the artificial fiber,
In addition to the carbon black, metal powder or the like is used. The charging brush 2A has a width of 2 to 20 on the surface of the photoconductor 1.
mm, and the contact amount (pressing amount) is 0.5 to 5 mm.

【００２２】ところで、本実施例においては、ブラシ帯
電装置２の帯電ブラシ２Ａのクリーニング装置として、
帯電ブラシ２Ａに振動を与える振動付与装置８が帯電ブ
ラシ２Ａのバックプレート２−２に設置されている。
尚、振動付与装置８としてはセラミック振動子が使用さ
れ、このセラミック振動子は周波数４０ＫＨｚで画像形
成の前後にそれぞれ帯電ブラシ２Ａに振動を与える。By the way, in this embodiment, as a cleaning device for the charging brush 2A of the brush charging device 2,
A vibration applying device 8 that applies vibration to the charging brush 2A is installed on the back plate 2-2 of the charging brush 2A.
A ceramic vibrator is used as the vibration applying device 8, and the ceramic vibrator applies a vibration to the charging brush 2A before and after image formation at a frequency of 40 KHz.

【００２３】而して、感光体１は図示矢印ａ方向に回転
し、これに接触するブラシ帯電装置２の帯電ブラシ２Ａ
によってその表面が所定の極性及び電位に帯電される。
そして、感光体１の表面に不図示の露光装置から記録光
３が照射されると、該感光体１の表面に静電潜像が形成
され、この静電潜像は現像装置４によってトナー像とし
て顕像化される。Thus, the photoconductor 1 rotates in the direction of the arrow a shown in the figure, and contacts the brush 1A of the brush charging device 2 of the brush charging device 2A.
The surface thereof is charged with a predetermined polarity and electric potential.
When the surface of the photoconductor 1 is irradiated with the recording light 3 from an exposure device (not shown), an electrostatic latent image is formed on the surface of the photoconductor 1, and the electrostatic latent image is developed by the developing device 4 into a toner image. Is visualized as.

【００２４】一方、感光体１と転写装置５の間（転写ニ
ップ部）には転写材Ｐが所定のタイミングで供給され、
転写装置５の作用によって転写材Ｐには感光体１上の前
記トナー像が転写される。そして、トナー像の転写を受
けた転写材Ｐは、不図示の定着装置に搬送されてトナー
像の定着を受けた後、機外に排出される。On the other hand, the transfer material P is supplied at a predetermined timing between the photoconductor 1 and the transfer device 5 (transfer nip portion),
The toner image on the photoconductor 1 is transferred onto the transfer material P by the action of the transfer device 5. Then, the transfer material P which has received the transfer of the toner image is conveyed to a fixing device (not shown) to be subjected to the fixing of the toner image, and then ejected outside the apparatus.

【００２５】以上が一連の画像形成プロセスであるが、
本実施例においては、前述のように振動付与装置８とし
てのセラミック振動子によって周波数４０ＫＨｚで画像
形成の前後にそれぞれ帯電ブラシ２Ａに振動が与えられ
るため、トナー微粉等が帯電ブラシ２Ａに付着すること
がなく、帯電時において高い電位安定性を確保すること
ができ、帯電ブラシ２Ａの汚れによる帯電不良、帯電ム
ラ等の発生を抑えてハケ筋状の画像濃淡ムラ等の無い高
品位な画像を得ることができる。The above is a series of image forming processes.
In this embodiment, as described above, the ceramic vibrator serving as the vibration applying device 8 applies vibration to the charging brush 2A before and after image formation at a frequency of 40 KHz, so that toner fine particles and the like adhere to the charging brush 2A. It is possible to secure high potential stability at the time of charging without charging, and to suppress the occurrence of charging failure due to dirt on the charging brush 2A, uneven charging, etc., and to obtain a high-quality image free of brush stripe image density unevenness. be able to.

【００２６】又、簡易な構成の振動付与装置８を付加す
るのみで上記効果が得られるため、装置の小型化が可能
となる。Further, since the above effect can be obtained only by adding the vibration applying device 8 having a simple structure, the device can be downsized.

【００２７】尚、本発明をキヤノン製レーザービームプ
リンター：レーザービームショットＡ４の改造機に適用
し、１枚毎にプリントが一旦終了するプリントモードで
４，０００枚までプリントを続けたが、帯電ブラシの汚
れによる帯電不良や帯電ムラは発生せず、高品位な画像
を安定して得ることができた。The present invention was applied to a modified laser beam printer manufactured by Canon Inc .: a laser beam shot A4, and printing was continued up to 4,000 sheets in a print mode in which printing was once completed for each sheet. No defective charging or uneven charging due to the stain was generated, and a high-quality image could be stably obtained.

【００２８】＜比較例１＞実施例１において、振動付与
装置８を取り外し、帯電ブラシ２Ａの汚れ防止を行わな
いようにした意外は実施例１と同様の構成でプリントを
続けたところ、約２，０００〜３，０００枚で帯電ブラ
シ２Ａの汚れによる帯電ムラが発生し、画像品質が著し
く低下した。<Comparative Example 1> In the first embodiment, the vibration applying device 8 is removed, and the charging brush 2A is prevented from being soiled, except that the printing is continued with the same configuration as the first embodiment. After 1,000 to 3,000 sheets, uneven charging occurred due to stains on the charging brush 2A, and the image quality significantly deteriorated.

【００２９】＜実施例２＞本実施例では、帯電ブラシ２
Ａに振動を与える振動付与装置８として交流電磁石を使
用した以外は実施例１と同様の構成を採用した。<Embodiment 2> In this embodiment, the charging brush 2 is used.
The same configuration as in Example 1 was adopted, except that an AC electromagnet was used as the vibration applying device 8 for applying vibration to A.

【００３０】而して、本実施例では、振動付与装置８と
しての交流電磁石によって周波数５０Ｈｚで帯電ブラシ
２Ａを振動させるようにした。Thus, in the present embodiment, the charging brush 2A is vibrated at a frequency of 50 Hz by the AC electromagnet as the vibration imparting device 8.

【００３１】そして、実施例１と同様にプリントを行っ
たところ、４，０００枚まで帯電ブラシ２Ａによる帯電
不良や帯電ムラは発生せず、高品位な画像を安定して得
ることができた。When printing was performed in the same manner as in Example 1, no charging failure or uneven charging due to the charging brush 2A occurred up to 4,000 sheets, and a high-quality image could be stably obtained.

【００３２】＜実施例３＞本実施例では、帯電ブラシ２
Ａに対する振動付与装置８としては実施例１と同様にセ
ラミック振動子を用い、現像装置５として非磁性１成分
接触現像方式を採用するものを用いた以外は実施例１と
同様の構成を採用した。<Third Embodiment> In this embodiment, the charging brush 2 is used.
As the vibration applying device 8 for A, a ceramic oscillator was used as in the first embodiment, and the same configuration as that of the first embodiment was adopted except that the developing device 5 adopting the non-magnetic one-component contact developing system was used. .

【００３３】実験検討のプリントモードとしては、２枚
連続プリントでプリントが一旦終了するようにした。As the print mode for the experimental examination, the print was once completed by two continuous prints.

【００３４】帯電ブラシ２Ａを振動させるタイミングと
して、画像形成前、画像形成後及び１枚目の画像形成時
に約１秒間振動を与えた。As the timing for vibrating the charging brush 2A, vibration was applied for about 1 second before image formation, after image formation and at the time of image formation of the first sheet.

【００３５】斯かるプリントモードで４，０００枚まで
プリントを続けたが、実施例１，２と同様に帯電ブラシ
２Ａによる帯電不良や帯電ムラは発生せず、高品位な画
像を安定して得ることができた。Printing was continued in this printing mode up to 4,000 sheets, but similar to the first and second embodiments, no charging failure or uneven charging due to the charging brush 2A occurred and a high-quality image was stably obtained. I was able to.

【００３６】尚、以上の実施例１〜３においては、振動
付与装置として振動子方式、電磁方式のものを使用した
が、その他機械式のものを使用しても良い。又、帯電ブ
ラシに振動を与えるタイミングとしては、プリントスタ
ートから画像形成に入るまでの画像形成前、画像形成後
プリント動作終了までの画像形成後及び連続プリント時
の画像形成後と次の画像形成に入るまでの中間のタイミ
ングが望ましく、１プリント動作当たり複数回振動を与
えても良い。或は、接触現像方式等の採用により、感光
体表面に付着している微粉トナー等を回収することがで
き、且つ、画像品質が劣化しない場合には、画像形成時
においても帯電ブラシに振動を与えることができる。In the above first to third embodiments, the vibration applying device is of the vibrator type or the electromagnetic type, but other mechanical type may be used. The timing of applying vibration to the charging brush may be set between the image formation from the start of printing to the start of image formation, after the image formation after the image formation until the end of the print operation, and after the image formation during continuous printing and the next image formation. An intermediate timing before entering is desirable, and vibration may be applied multiple times per printing operation. Alternatively, by adopting the contact development method or the like, it is possible to collect the fine powder toner and the like adhering to the surface of the photoconductor, and if the image quality does not deteriorate, the charging brush is vibrated even during image formation. Can be given.

【００３７】[0037]

【発明の効果】以上の説明で明らかなように、本発明に
よれば、振動付与装置によって帯電ブラシに振動が与え
られるため、トナー微粉等が帯電ブラシに付着すること
がなく、帯電時において高い電位安定性を確保すること
ができ、帯電ブラシの汚れによる帯電不良、帯電ムラ等
の発生を抑えてハケ筋状の画像濃淡ムラ等の無い高品位
な画像を得ることができる。As is apparent from the above description, according to the present invention, since the charging brush is vibrated by the vibration applying device, the toner fine powder and the like do not adhere to the charging brush, and are high during charging. The potential stability can be secured, and the occurrence of defective charging, uneven charging, and the like due to stains on the charging brush can be obtained, and a high-quality image free of brush stripe image unevenness in density and the like can be obtained.

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

【図１】本発明に係る画像形成装置要部の断面図であ
る。FIG. 1 is a cross-sectional view of a main part of an image forming apparatus according to the present invention.

【符号の説明】[Explanation of symbols]

１ 感光体 ２ ブラシ帯電装置 ２Ａ 帯電ブラシ ３ 露光装置 ４ 現像装置 ５ 転写装置 ６ クリーニング装置 ７ 除電装置 ８ 振動付与装置 DESCRIPTION OF SYMBOLS 1 Photoconductor 2 Brush charging device 2A Charging brush 3 Exposure device 4 Developing device 5 Transfer device 6 Cleaning device 7 Static eliminator 8 Vibration imparting device

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 感光体に接触してこれを帯電させるブラ
シ帯電装置の帯電ブラシに振動を与える振動付与装置に
よって構成されることを特徴とする帯電ブラシのクリー
ニング装置。1. A cleaning device for a charging brush, comprising a vibration applying device for vibrating a charging brush of a brush charging device that contacts a photosensitive member and charges the photosensitive member. 【請求項２】 感光体の周囲にブラシ帯電装置、露光装
置、現像装置、転写装置等のプロセス手段を配設して成
る画像形成装置において、前記ブラシ帯電装置の帯電ブ
ラシに振動を与える振動付与装置によって構成されるク
リーニング装置を設けたことを特徴とする画像形成装
置。2. An image forming apparatus comprising process means such as a brush charging device, an exposure device, a developing device, and a transfer device arranged around a photoconductor, and a vibration imparting means for vibrating the charging brush of the brush charging device. An image forming apparatus comprising a cleaning device configured by the device. 【請求項３】 前記帯電ブラシは、導電部材を分散した
人工繊維で構成されることを特徴とする請求項２記載の
画像形成装置。3. The image forming apparatus according to claim 2, wherein the charging brush is made of an artificial fiber in which a conductive member is dispersed.
JP16771694A 1994-07-20 1994-07-20 Cleaning device for electrifying brush and image forming device Pending JPH0830074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16771694A JPH0830074A (en) 1994-07-20 1994-07-20 Cleaning device for electrifying brush and image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16771694A JPH0830074A (en) 1994-07-20 1994-07-20 Cleaning device for electrifying brush and image forming device

Publications (1)

Publication Number Publication Date
JPH0830074A true JPH0830074A (en) 1996-02-02

Family

ID=15854876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16771694A Pending JPH0830074A (en) 1994-07-20 1994-07-20 Cleaning device for electrifying brush and image forming device

Country Status (1)

Country Link
JP (1) JPH0830074A (en)

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