JPH07191583A - Destaticizing device and image forming device - Google Patents

Destaticizing device and image forming device

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Publication number
JPH07191583A
JPH07191583A JP33169293A JP33169293A JPH07191583A JP H07191583 A JPH07191583 A JP H07191583A JP 33169293 A JP33169293 A JP 33169293A JP 33169293 A JP33169293 A JP 33169293A JP H07191583 A JPH07191583 A JP H07191583A
Authority
JP
Japan
Prior art keywords
conductive
static eliminator
destaticizing
parts
protective film
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
JP33169293A
Other languages
Japanese (ja)
Inventor
Yuichi Hashimoto
雄一 橋本
Shoji Amamiya
昇司 雨宮
Akio Maruyama
晶夫 丸山
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 JP33169293A priority Critical patent/JPH07191583A/en
Publication of JPH07191583A publication Critical patent/JPH07191583A/en
Pending legal-status Critical Current

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  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Abstract

PURPOSE:To evenly and uniformly destaticize a photoreceptor without using a destaticizing lamp by providing the surface of the photoreceptor with a conductive destaticizing member for removing the charges remaining thereon. CONSTITUTION:This image forming device is so constituted that a photosensitive drum 1 having a semiconductive protective film 2 on a photosensitive layer 3 rotates at a uniform speed. A part of the photoreceptor 1 is in contact with the roller-shaped destaticizing device having the conductive destaticizing member and the charges remaining in the photosensitive drum 1 are moved to the conductive destaticizing member side and are thereby erased. Metals, such as aluminum, iron and copper, conductive high molecular compd., such as polyacetylene and polypyrrole, insulating resins, such as polycarbonate and polyester, of which the surfaces are laminated with conductive materials and binder resins in which conductive particles, such as carbon black, are dispersed, are used as the material of the conductive destaticizing member. A DC voltage or AC voltage or voltages superposed with both are impressed to the conductive destaticizing member in order to enhance a destaticization effect.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は複写機やレーザープリン
ター、ファックスなどの電子写真方式で画像を形成する
画像形成装置に用いられる除電装置、及び画像形成装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static eliminator used in an image forming apparatus for forming an image by an electrophotographic system such as a copying machine, a laser printer and a fax machine, and an image forming apparatus.

【0002】[0002]

【従来の技術】従来の画像形成装置は装置本体内に静電
潜像を担持するための感光体ドラムを有しており、帯電
装置によって感光体ドラムの表面を均一に帯電させた後
に露光ランプからの光が感光体ドラムの表面へ照射され
て、感光体ドラム表面へ静電潜像が形成される。この静
電潜像は現像装置によって現像され、得られたトナー像
が転写紙に転写される。トナー像の転写処理が終了する
と、感光体ドラムの表面に残留したトナーが、クリーニ
ング装置により清掃された後に、除電ランプからの光が
感光体ドラム表面上へ照射されて、この感光体ドラムの
表面電荷が消去される。
2. Description of the Related Art A conventional image forming apparatus has a photosensitive drum for carrying an electrostatic latent image in a main body of the apparatus, and an exposure lamp is provided after a surface of the photosensitive drum is uniformly charged by a charging device. The light is emitted to the surface of the photoconductor drum to form an electrostatic latent image on the surface of the photoconductor drum. This electrostatic latent image is developed by a developing device, and the obtained toner image is transferred to transfer paper. When the transfer process of the toner image is completed, the toner remaining on the surface of the photoconductor drum is cleaned by the cleaning device, and then the light from the charge eliminating lamp is irradiated onto the surface of the photoconductor drum, so that the surface of the photoconductor drum is discharged. The charge is erased.

【0003】この様に除電ランプからの光を感光体ドラ
ム表面に照射することにより、感光体ドラムの表面電位
はほぼ零ボルトに設定される。
By irradiating the surface of the photosensitive drum with the light from the charge eliminating lamp, the surface potential of the photosensitive drum is set to approximately zero volt.

【0004】この様な除電ランプとしては、感光体ドラ
ムの感度特性などを考慮して選定されており、例えば白
色光源に所定のフィルターを付設して透過した光を照射
するようにしたものやネオンランプまたは発光ダイオー
ドなどを用いてきた。
Such a static elimination lamp is selected in consideration of the sensitivity characteristics of the photosensitive drum, and for example, a white light source provided with a predetermined filter to irradiate the transmitted light or neon. Lamps or light emitting diodes have been used.

【0005】[0005]

【発明が解決しようとする課題】ところが、これらの光
源はいずれも発熱を生じたり、感光体ドラムの感度特性
などの制約から適度な光量及び発光スペクトルを考慮し
なければならないという問題点を有していた。
However, all of these light sources have the problems that they generate heat and that a proper light amount and emission spectrum must be taken into consideration due to restrictions such as the sensitivity characteristics of the photosensitive drum. Was there.

【0006】また、反転現像方式の画像形成装置では転
写工程で感光体ドラムに一次帯電とは逆極性の帯電が施
されるため、除電ランプではその電荷を除去できないと
いう問題点を有していた。
Further, in the reversal development type image forming apparatus, since the photosensitive drum is charged with a polarity opposite to that of the primary charging in the transfer process, there is a problem that the charge cannot be removed by the charge eliminating lamp. .

【0007】本発明の目的は、発熱が全くなく、また、
感度特性の異なる感光体ドラムや反転現像方式の画像形
成装置においても効率の良い除電が可能な画像形成装置
の除電装置を実現することを目的とする。
The object of the present invention is to generate no heat, and
An object of the present invention is to realize a charge eliminating device of an image forming apparatus capable of efficiently eliminating charge even in a photoconductor drum having a different sensitivity characteristic or an image forming apparatus of a reversal developing system.

【0008】[0008]

【課題を解決するための手段】すなわち、本発明は、半
導電性保護膜を有する電子写真感光体に用いられる除電
装置であって、該感光体上に残留する電荷を除去するた
めの導電性除電部材を有することを特徴とする除電装置
である。
SUMMARY OF THE INVENTION That is, the present invention is a static eliminator used for an electrophotographic photosensitive member having a semi-conductive protective film, which is electrically conductive to remove electric charges remaining on the photosensitive member. A static eliminator having a static eliminator.

【0009】また、本発明は、半導電性保護膜が導電性
微粒子を含有する上記除電装置である。
Further, the present invention is the above static eliminator, wherein the semiconductive protective film contains conductive fine particles.

【0010】また、本発明は、上記除電装置を有するこ
とを特徴とする、反転現像方式の画像形成装置である。
Further, the present invention is an image forming apparatus of a reversal developing system, which is characterized by having the above-mentioned charge eliminating device.

【0011】また、本発明は、上記除電装置を有するこ
とを特徴とする、画像形成装置である。
Further, the present invention is an image forming apparatus characterized by having the above-mentioned charge eliminating device.

【0012】電子写真プロセスにおいて、感光体の帯電
は、コロナ帯電や、ローラー帯電法、ブラシ帯電法、電
極帯電法などの非コロナ帯電法により行なわれている。
In the electrophotographic process, the photoreceptor is charged by a corona charging method or a non-corona charging method such as a roller charging method, a brush charging method or an electrode charging method.

【0013】本発明においては、半導電性保護膜を有す
る感光体を用いているため、前述の帯電法を行なうと、
図1に示す様に、感光体表面から電荷が注入され、帯電
は、半導電性保護膜と感光層との界面に行なわれる。
In the present invention, since a photoreceptor having a semiconductive protective film is used, when the above charging method is performed,
As shown in FIG. 1, charges are injected from the surface of the photoconductor, and charging is performed at the interface between the semiconductive protective film and the photosensitive layer.

【0014】従って、図2に示す様に、本発明の導電性
除電部材を感光体表面に接触させれば、導電性除電部材
側へ移動し、感光体の除電が可能となる。
Therefore, as shown in FIG. 2, when the conductive charge eliminating member of the present invention is brought into contact with the surface of the photoconductor, the charge is removed to the conductive charge eliminating member side.

【0015】さらに、本発明の除電装置は、反転現像方
式の転写工程によって施された感光ドラムの一次帯電と
は逆極性の帯電を除去することも、上記と同様のプロセ
スで可能である。
Further, in the charge eliminating device of the present invention, it is possible to remove the charge having the opposite polarity to the primary charge of the photosensitive drum, which is applied in the transfer process of the reversal development system, by the same process as described above.

【0016】本発明の導電性除電部材の形状は、図2に
示したローラー状以外にブレード状、回転ベルト状、ブ
ラシ状、ピース状、導電性粒子を用いた磁気ブラシ状な
どが挙げられる。
In addition to the roller shape shown in FIG. 2, the conductive static eliminating member of the present invention may have a blade shape, a rotating belt shape, a brush shape, a piece shape, a magnetic brush shape using conductive particles, or the like.

【0017】本発明に用いられる導電性除電部材の抵抗
率は1010Ω・cm以下であることが除電の点から好ま
しい。
From the standpoint of static elimination, the conductive static elimination member used in the present invention preferably has a resistivity of 10 10 Ω · cm or less.

【0018】本発明に用いられる導電性除電部材の材質
は、アルミニウム、鉄、銅などの金属、ポリアセチレ
ン、ポリピロールなどの導電性高分子、ポリカーボネー
ト、ポリエステルなどの絶縁性樹脂やゴムの表面を金属
あるいは他の導電性物質でラミネートまたはコートした
ものや、バインダー樹脂中にカーボンブラックなどの導
電性粒子を分散させて導電コントロールしたものなどを
用いることができる。
The material of the conductive charge-eliminating member used in the present invention is a metal such as aluminum, iron or copper, a conductive polymer such as polyacetylene or polypyrrole, an insulating resin such as polycarbonate or polyester, or a rubber surface. It is possible to use those laminated or coated with another conductive material, those in which conductive particles such as carbon black are dispersed in a binder resin to control the conductivity, and the like.

【0019】また、除電の効率を上げるために、本発明
の除電装置の導電性除電部材に直流電圧及び交流電圧又
は直流に交流を重畳した電圧を印加しても良い。
Further, in order to improve the efficiency of static elimination, a DC voltage and an AC voltage or a voltage obtained by superimposing AC on a DC voltage may be applied to the conductive static elimination member of the static eliminator of the present invention.

【0020】本発明における半導電性保護膜とは、バイ
ンダー樹脂中に導電性微粒子が分散含有されたものであ
る。
The semiconductive protective film in the present invention is one in which conductive fine particles are dispersed and contained in a binder resin.

【0021】このバインダー樹脂としては、熱可塑性で
も硬化性樹脂でもよくアクリル樹脂、エポキシ樹脂、シ
リコーン樹脂、グアナミン樹脂、メラミン樹脂、ポリウ
レタン樹脂、ポリカーボネート樹脂、ポリエステル樹
脂、フッ素樹脂など、通常の市販の樹脂が挙げられる。
The binder resin may be a thermoplastic resin or a curable resin, and ordinary commercially available resins such as acrylic resin, epoxy resin, silicone resin, guanamine resin, melamine resin, polyurethane resin, polycarbonate resin, polyester resin and fluororesin. Is mentioned.

【0022】また、導電性微粒子としては、アルミニウ
ム、ニッケルなどの金属、酸化亜鉛、酸化スズ、酸化イ
ンジウムあるいはこれら物質の固溶体もしくは融着体な
どの酸化金属からなるものを一種あるいはそれ以上が適
宜選択され使用することができる。
As the conductive fine particles, one or more particles selected from metals such as aluminum and nickel, zinc oxide, tin oxide, indium oxide, and metal oxides such as a solid solution or a fused body of these substances are appropriately selected. Can be used.

【0023】この導電性微粒子の粒子径は、膜の透光性
の点から0.3μm以下であることが好ましく、0.1
μm以下であることがより好ましい。
The particle size of the conductive fine particles is preferably 0.3 μm or less from the viewpoint of translucency of the film, and is 0.1.
More preferably, it is less than or equal to μm.

【0024】また、半導電性保護膜の電気抵抗は、10
7 〜1015Ω・cmの範囲が好ましい。
The electric resistance of the semiconductive protective film is 10
The range of 7 to 10 15 Ω · cm is preferable.

【0025】半導電性保護膜中には、分散性、接着性あ
るいは平滑性を向上させる目的で、種々の添加剤を加え
ることができる。
Various additives may be added to the semiconductive protective film for the purpose of improving dispersibility, adhesiveness or smoothness.

【0026】半導電性保護膜は、バインダー樹脂、導電
性微粒子及び必要な添加剤を感光層上に得ることができ
る。
The semiconductive protective film can obtain a binder resin, conductive fine particles and necessary additives on the photosensitive layer.

【0027】感光層としては従来公知のものを使用する
ことができる。
As the photosensitive layer, a conventionally known layer can be used.

【0028】また導電性支持体としては、アルミニウ
ム、ニッケル、ステンレスなどの金属、導電性膜を有す
るプラスチックシートあるいはガラス、導電化処理を施
した紙などを用いることができる。
As the conductive support, a metal such as aluminum, nickel or stainless steel, a plastic sheet or glass having a conductive film, or a paper which has been subjected to a conductive treatment can be used.

【0029】[0029]

【実施例】以下、本発明を実施例により説明する。 (実施例1)以下、本発明を実施例により説明する。図
2は本発明の一実施例を説明する概略図である。
EXAMPLES The present invention will be described below with reference to examples. (Example 1) Hereinafter, the present invention will be described with reference to examples. FIG. 2 is a schematic diagram illustrating an embodiment of the present invention.

【0030】感光層3上に半導電性保護膜2を有する感
光体ドラム1が矢印7の方向へ等速回転するように構成
されている。
The photosensitive drum 1 having the semiconductive protective film 2 on the photosensitive layer 3 is constituted so as to rotate at a constant speed in the direction of arrow 7.

【0031】感光体1の一部は、導電性除電部材を有す
るローラー状除電装置6に接しており、感光体ドラム1
中に残留する電荷を導電性除電部材側へ移動及び消去さ
せるようになっている。
A part of the photoconductor 1 is in contact with a roller-shaped static eliminator 6 having a conductive static eliminator, and the photoconductor drum 1
The electric charge remaining therein is moved and erased to the side of the conductive charge eliminating member.

【0032】この様に、除電を行なう部分を除いては、
すべて従来の電子写真装置と全く同一の手段を採用する
ことができる。
As described above, except for the portion for removing charge,
All the same means as those of the conventional electrophotographic apparatus can be adopted.

【0033】感光体ドラム1は上述したように感光層3
の表面に半導電性保護膜2を設けてなるものであるが、
この感光体ドラム1は次のようにして形成したものを用
いた。
The photosensitive drum 1 has the photosensitive layer 3 as described above.
The semi-conductive protective film 2 is provided on the surface of
The photosensitive drum 1 used was formed as follows.

【0034】10%の酸化アンチモンを含有する酸化ス
ズで被覆した導電性酸化チタン粉体50部(重量部、以
下同じ)、フェノール樹脂25部、メチルセロソルブ2
0部、メタノール5部及びシリコーンオイル(ポリジメ
チルシロキサンポリオキシアルキレン共重合体、平均分
子量3000)0.002部をφ1mmガラスビーズを
用いたサンドミル装置で2時間分散して導電層用塗料を
調製した。
50 parts of conductive titanium oxide powder coated with tin oxide containing 10% antimony oxide (parts by weight, the same applies hereinafter), 25 parts of phenol resin, and methyl cellosolve 2
0 parts, 5 parts of methanol and 0.002 parts of silicone oil (polydimethylsiloxane polyoxyalkylene copolymer, average molecular weight 3000) were dispersed for 2 hours in a sand mill using φ1 mm glass beads to prepare a conductive layer coating material. .

【0035】アルミニウムシリンダー(φ80mm×3
60mm)上に、上記塗料を浸漬塗布し、140℃で3
0分間乾燥させ、膜厚20μmの導電層を形成した。
Aluminum cylinder (φ80mm × 3
60mm), and apply the above coating by dip coating,
It was dried for 0 minutes to form a conductive layer having a film thickness of 20 μm.

【0036】次に、アルコール可溶性共重合ナイロン樹
脂(平均分子量29000)10部、メトキシメチル化
6ナイロン樹脂(平均分子量32000)30部をメタ
ノール260部、ブタノール40部の混合溶媒中に溶解
した。
Next, 10 parts of alcohol-soluble copolymer nylon resin (average molecular weight 29000) and 30 parts of methoxymethylated 6 nylon resin (average molecular weight 32000) were dissolved in a mixed solvent of 260 parts of methanol and 40 parts of butanol.

【0037】この調合液を上記導電層上に浸漬塗布して
膜厚1μmの中間層を設けた。
This prepared solution was applied onto the conductive layer by dip coating to form an intermediate layer having a film thickness of 1 μm.

【0038】次に、構造式Next, the structural formula

【0039】[0039]

【化1】 のジスアゾ顔料4部、ポリビニルブチラール(ブチラー
ル化率68%、重量平均分子量24000)2部及びシ
クロヘキサノン34部をφ1mmガラスビーズを用いた
サンドミル装置で12時間分散した後、テトラヒドロフ
ラン60部を加えて電荷発生層用分散液を調製した。こ
の分散液を上記中間層上に浸漬塗布し、80℃で15分
間乾燥させ、膜厚0.15μmの電荷発生層を形成し
た。
[Chemical 1] 4 parts of disazo pigment, 2 parts of polyvinyl butyral (butyralization ratio 68%, weight average molecular weight 24000) and 34 parts of cyclohexanone are dispersed for 12 hours in a sand mill using φ1 mm glass beads, and 60 parts of tetrahydrofuran is added to generate an electric charge. A layer dispersion was prepared. This dispersion was applied onto the above intermediate layer by dip coating and dried at 80 ° C. for 15 minutes to form a charge generation layer having a film thickness of 0.15 μm.

【0040】次に、構造式Next, the structural formula

【0041】[0041]

【化2】 のスチリル化合物10部及びポリカーボネート(重量平
均分子量46000)10部をジクロルメタン20部、
モノクロルベンゼン40部の混合溶媒中に溶解し、この
溶液を上記の電荷発生層上に浸漬塗布し、120℃で6
0分間乾燥させ、膜厚19μmの電荷輸送層を形成し
た。
[Chemical 2] Of styryl compound of 10 parts and polycarbonate (weight average molecular weight of 46000) of 10 parts of dichloromethane,
It is dissolved in a mixed solvent of 40 parts of monochlorobenzene, and this solution is dip-coated on the above-mentioned charge generation layer, and the solution is mixed at 120 ° C. for 6 minutes.
It was dried for 0 minutes to form a charge transport layer having a film thickness of 19 μm.

【0042】次に、構造式Next, the structural formula

【0043】[0043]

【化3】 で示されるアクリレートモノマー60部、分散前の平均
粒径400Åの酸化スズ微粒子30部、光開始剤として
2−メチルチオキサントン0.1部、トルエン300部
を混合してサンドミルにて48時間分散を行なった。
[Chemical 3] 60 parts of acrylate monomer, 30 parts of tin oxide fine particles having an average particle size of 400Å before dispersion, 0.1 part of 2-methylthioxanthone as a photoinitiator, and 300 parts of toluene are mixed and dispersed in a sand mill for 48 hours. It was

【0044】この調合液を先の電荷輸送層上にビームコ
ーティング法により成膜し、乾燥した後、高圧水銀灯に
て8mW/cm2 の光強度で20秒間光硬化を行ない、
半導電性保護膜を設けた。この半導電性保護膜の膜厚は
7μm、抵抗率は1011Ω・cmであった。
This prepared solution was formed on the above charge transport layer by a beam coating method, dried, and then photocured with a high pressure mercury lamp at a light intensity of 8 mW / cm 2 for 20 seconds.
A semiconductive protective film was provided. The thickness of this semiconductive protective film was 7 μm, and the resistivity was 10 11 Ω · cm.

【0045】この様にして製造した感光体ドラムをクロ
ロプレンゴム100部に導電性カーボン15部を熔融混
練し、中心にステンレス軸を通してφ20×340mm
になるように成形した導電性除電部材よりなる除電装置
を有する正現像方式の複写機に取り付け、電子写真特性
を評価した。
The photosensitive drum produced in this manner was melt-kneaded with 100 parts of chloroprene rubber and 15 parts of conductive carbon, and a stainless steel shaft was passed through the center to obtain φ20 × 340 mm.
It was attached to a positive development type copying machine having a static eliminator composed of a conductive static eliminator molded so that the electrophotographic characteristics were evaluated.

【0046】上記複写機内で帯電を行なったところ−8
00(V)の初期暗部電位が得られ、除電後の電位は−
25(V)と除電ランプを用いた場合と同様の残留電位
であった。
When charged in the above copying machine, -8
An initial dark area potential of 00 (V) was obtained, and the potential after static elimination was −
The residual potential was 25 (V), which was the same as that when a charge eliminating lamp was used.

【0047】さらに、一次帯電−露光−現像−転写−除
電のプロセスを10000回繰り返し行なっても除電後
電位の上昇は15(V)であり、ムラや濃度低下のない
安定した画像が得られた。
Further, even after the processes of primary charging-exposure-development-transfer-static elimination were repeated 10,000 times, the potential increase after static elimination was 15 (V), and a stable image without unevenness or density decrease was obtained. .

【0048】(実施例2)実施例1の半導電性保護膜中
のアクリレートモノマーとして
Example 2 As an acrylate monomer in the semiconductive protective film of Example 1

【0049】[0049]

【化4】 を用いる他は、実施例1と同様にして感光体ドラムを作
製した。
[Chemical 4] A photosensitive drum was produced in the same manner as in Example 1 except that was used.

【0050】この様にして製造した感光体ドラムを図3
に示すように、平均粒子径30μm、抵抗率106 Ω・
cmのNi導電性粒子8を用い、感光体1の表面と電極
9の表面との間隔を1mmとし、交流500(V)のバ
イアス電位を印加することよりなる除電装置を有する正
現像方式の複写機に取り付け、電子写真特性を評価し
た。
The photosensitive drum manufactured in this manner is shown in FIG.
As shown in, the average particle diameter is 30 μm and the resistivity is 10 6 Ω.
cm of Ni conductive particles 8 and the distance between the surface of the photosensitive member 1 and the surface of the electrode 9 is 1 mm, and a positive developing method copying having a charge eliminating device by applying a bias potential of AC 500 (V) Mounted on a machine and evaluated for electrophotographic properties.

【0051】上記複写機内で帯電を行なったところ−7
80(V)の初期暗部電位が得られ、除電後の電位は−
25(V)と除電ランプを用いた場合と同様の残留電位
であった。
When charged in the above copying machine, -7
An initial dark area potential of 80 (V) was obtained, and the potential after static elimination was −
The residual potential was 25 (V), which was the same as that when a charge eliminating lamp was used.

【0052】さらに、一次帯電−露光−現像−転写−除
電のプロセスを10000回繰り返し行なっても除電後
電位の上昇は5(V)であり、ムラや濃度低下のない安
定した画像が得られた。
Furthermore, even after the processes of primary charging-exposure-development-transfer-static elimination were repeated 10,000 times, the potential increase after static elimination was 5 (V), and a stable image without unevenness or density decrease was obtained. .

【0053】(実施例3)実施例1の半導電性保護膜中
のアクリレートモノマーとして
Example 3 As an acrylate monomer in the semiconductive protective film of Example 1

【0054】[0054]

【化5】 を用いる他は、実施例1と同様にして感光体ドラムを作
製した。
[Chemical 5] A photosensitive drum was produced in the same manner as in Example 1 except that was used.

【0055】この様にして製造した感光体ドラムを図4
に示すように、平均粒子径20μm、抵抗率105 Ω・
cmの磁性導電性粒子12を用い、感光体1の表面とマ
グロール(800ガウスのマグネットが10極内蔵さ
れ、700rpmで回転)11の表面との間隔が0.2
mmよりなる除電装置を有する正現像方式の複写機に取
り付け、電子写真特性を評価した。
The photoconductor drum manufactured in this manner is shown in FIG.
As shown in, the average particle diameter is 20 μm and the resistivity is 10 5 Ω.
cm magnetic conductive particles 12 are used, and the distance between the surface of the photoreceptor 1 and the surface of the mag roll (10 magnets of 800 gauss are built in 10 poles and rotates at 700 rpm) 11 is 0.2.
The electrophotographic characteristics were evaluated by mounting on a copier of a positive development system having a static eliminator having a size of mm.

【0056】上記複写機内で帯電を行なったところ−8
00(V)の初期暗部電位が得られ、除電後の電位は−
20(V)と、除電ランプを用いた場合と同様の残留電
位であった。
When charged in the above copying machine, -8
An initial dark area potential of 00 (V) was obtained, and the potential after static elimination was −
The residual potential was 20 (V), which was the same as that when the charge eliminating lamp was used.

【0057】さらに帯電−除電のプロセスを10000
回繰り返し行なっても除電後電位の上昇は10(V)で
あり、ムラや濃度低下のない安定した画像が得られた。
Further, the process of charging-discharging was performed 10,000 times.
Even after repeated operations, the potential rise after static elimination was 10 (V), and a stable image without unevenness or density decrease was obtained.

【0058】(実施例4)φ30mm×260mmのア
ルミニウムシリンダー上に実施例1と同様の方法で、導
電層及び中間層を設けた。
Example 4 A conductive layer and an intermediate layer were provided on an aluminum cylinder of φ30 mm × 260 mm by the same method as in Example 1.

【0059】次に、構造式Next, the structural formula

【0060】[0060]

【化6】 のジスアゾ顔料4部、ポリビニルベンザール(ベンザー
ル化率80%、重量平均分子量11000)2部、及び
シクロヘキサノン30部をφ1mmガラスビーズを用い
たサンドミル装置で20時間分散した後、メチルエチル
ケトン60部を加えて電荷発生層用分散液を調製した。
この分散液を上記中間層上に浸漬塗布し、80℃で15
分間乾燥させ、膜厚0.10μmの電荷発生層を形成し
た。
[Chemical 6] 4 parts of disazo pigment, 2 parts of polyvinylbenzal (benzalization rate 80%, weight average molecular weight 11,000), and 30 parts of cyclohexanone were dispersed for 20 hours in a sand mill using φ1 mm glass beads, and then 60 parts of methyl ethyl ketone was added. A charge generation layer dispersion liquid was prepared.
This dispersion is applied onto the above intermediate layer by dip coating, and the dispersion is applied at 80 ° C. for 15
After drying for a minute, a charge generation layer having a film thickness of 0.10 μm was formed.

【0061】次に、構造式Next, the structural formula

【0062】[0062]

【化7】 の電荷輸送材料10部及びポリカーボネート(重量平均
分子量25000)10部をジクロルメタン20部、モ
ノクロルベンゼン40部の混合溶媒中に溶解し、この溶
液を上記の電荷発生層上に浸漬塗布し、120℃で60
分間乾燥させ、膜厚15μmの電荷輸送層を形成した。
[Chemical 7] 10 parts of the charge transport material and 10 parts of polycarbonate (weight average molecular weight 25000) are dissolved in a mixed solvent of 20 parts of dichloromethane and 40 parts of monochlorobenzene, and this solution is dip-coated on the charge generation layer at 120 ° C. 60
After being dried for a minute, a charge transport layer having a film thickness of 15 μm was formed.

【0063】次に、構造式Next, the structural formula

【0064】[0064]

【化8】 で示されるアクリレートモノマー60部、分散前の平均
粒径380ÅのITO微粒子30部、光開始剤としてベ
ンゾフェノン0.06部、トルエン300部を混合し
て、ボールミルにて24時間分散を行なった。
[Chemical 8] 60 parts of an acrylate monomer represented by the following formula, 30 parts of ITO fine particles having an average particle size of 380Å before dispersion, 0.06 part of benzophenone as a photoinitiator, and 300 parts of toluene were mixed and dispersed in a ball mill for 24 hours.

【0065】この調合液を先の電荷輸送層上にビームコ
ーティング法により成膜し、乾燥した後、高圧水銀灯に
て8mW/cm2 の光強度で30秒間光硬化を行ない、
半導電性保護膜を設けた。この半導電性保護膜の膜厚は
4.5μm、抵抗率は1012Ω・cmであった。
This formulation solution was formed on the above charge transport layer by a beam coating method, dried, and then photocured with a high pressure mercury lamp at a light intensity of 8 mW / cm 2 for 30 seconds.
A semiconductive protective film was provided. The thickness of this semiconductive protective film was 4.5 μm, and the resistivity was 10 12 Ω · cm.

【0066】この様にして製造した感光体ドラムを多数
のカーボン繊維を束ねた導電性ブラシよりなる除電装置
を有する反転現像方式のプリンターに取り付け、電子写
真特性を評価した。
The photoconductor drum thus manufactured was attached to a reversal development type printer having a static eliminator comprising a conductive brush in which a large number of carbon fibers were bundled, and electrophotographic characteristics were evaluated.

【0067】この反転現像方式におけるトナーの極性
は、上記の感光体の一次帯電の極性と同一であるから、
潜像の現像により得られたトナー像を転写材上に転写す
る転写装置は、転写工程時、感光体の一次帯電の極性と
逆極性にされている。
Since the polarity of the toner in this reversal developing method is the same as the polarity of the primary charging of the above-mentioned photoconductor,
A transfer device that transfers a toner image obtained by developing a latent image onto a transfer material has a polarity opposite to the polarity of the primary charging of the photoconductor during the transfer process.

【0068】上記プリンター内で帯電を行なったところ
−750(V)の初期暗部電位が得られ、除電後の電位
は−15(V)と除電ランプを用いた場合と同様の残留
電位であった。
When charged in the printer, an initial dark area potential of -750 (V) was obtained, and the potential after static elimination was -15 (V), which was the same residual potential as in the case of using a static elimination lamp. .

【0069】さらに、一次帯電−露光−現像−転写−除
電のプロセスを10000回繰り返し行なっても、除電
後電位の上昇は5(V)であり、ムラや濃度低下のない
安定した画像が得られた。
Further, even if the processes of primary charging-exposure-developing-transfer-static elimination are repeated 10,000 times, the potential increase after static elimination is 5 (V), and a stable image without unevenness or density decrease can be obtained. It was

【0070】(実施例5)実施例4の半導電性保護膜中
のアクリレートモノマーとして
Example 5 As an acrylate monomer in the semiconductive protective film of Example 4

【0071】[0071]

【化9】 を用いる他は、実施例4と同様にして感光体ドラムを作
製した。
[Chemical 9] A photosensitive drum was manufactured in the same manner as in Example 4 except that

【0072】この様にして製造した感光体ドラムをウレ
タン樹脂製ブレードの表面にカーボンブラック30重量
%含有の熱可塑性ウレタン溶液を刷毛塗り後硬化させた
導電性ブレードよりなる除電装置を有する反転現像方式
のプリンターに取り付け、電子写真特性を評価した。
In the reversal development system having a charge eliminating device composed of a conductive blade in which a photosensitive drum manufactured in this manner is coated with a urethane urethane resin blade on the surface of which a thermoplastic urethane solution containing 30% by weight of carbon black is applied and then cured. Was attached to the printer and the electrophotographic characteristics were evaluated.

【0073】上記プリンター内で帯電を行なったところ
−770(V)の初期暗部電位が得られ、除電後の電位
は−10(V)と除電ランプを用いた場合と同様の残留
電位であった。
When charging was carried out in the printer, an initial dark area potential of -770 (V) was obtained, and the potential after static elimination was -10 (V), which was the same residual potential as when a static elimination lamp was used. .

【0074】さらに一次帯電−露光−現像−転写−除電
のプロセスを10000回繰り返し行なっても、除電後
電位の上昇は10(V)であり、ムラや濃度低下のない
安定した画像が得られた。
Further, even if the process of primary charging-exposure-development-transfer-static elimination was repeated 10,000 times, the potential increase after static elimination was 10 (V), and a stable image without unevenness or density decrease was obtained. .

【0075】[0075]

【発明の効果】本発明の除電装置、及びそれを有する画
像形成装置によると、除電ランプを用いることなく、感
光体をムラなく均一に除電することができ、良好な画像
再現を行なうことができる。また、感光特性の異なる種
々の感光体に対応でき、さらに反転現像方式にも対応で
きる。
According to the charge eliminating device of the present invention and the image forming apparatus having the same, it is possible to eliminate the charge evenly on the photoconductor without using the charge eliminating lamp, and to perform good image reproduction. . Further, it can be applied to various photoconductors having different photosensitivity, and can also be applied to the reversal development method.

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

【図1】半導電性保護膜を有する感光体の帯電概略図で
ある。
FIG. 1 is a schematic diagram of charging of a photoconductor having a semiconductive protective film.

【図2】本発明の一実施例の導電性除電部材を有する除
電装置の構成図である。
FIG. 2 is a configuration diagram of a static eliminator having a conductive static eliminator according to an embodiment of the present invention.

【図3】本発明の一実施例の導電性除電部材を有する除
電装置の構成図である。
FIG. 3 is a configuration diagram of a static eliminator having a conductive static eliminator according to an embodiment of the present invention.

【図4】本発明の一実施例の導電性除電部材を有する除
電装置の構成図である。
FIG. 4 is a configuration diagram of a static eliminator having a conductive static eliminator of an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 感光体ドラム 2 半導電性保護膜 3 感光層 4 導電性支持体 5 帯電器 6 導電性除電部材を有する除電装置 7 感光体ドラム回転方向 8 導電性粒子 9 電極 10 電源 11 マグロール 12 磁性導電性粒子 DESCRIPTION OF SYMBOLS 1 Photoconductor drum 2 Semi-conductive protective film 3 Photosensitive layer 4 Conductive support 5 Charger 6 Static eliminator having conductive static elimination member 7 Photoconductor drum rotation direction 8 Conductive particles 9 Electrode 10 Power supply 11 Mag roll 12 Magnetic conductivity particle

Claims (9)

【特許請求の範囲】[Claims] 【請求項1】 半導電性保護膜を有する電子写真感光体
に用いられる除電装置であって、該感光体上に残留する
電荷を除去するための導電性除電部材を有することを特
徴とする除電装置。
1. A static eliminator used for an electrophotographic photosensitive member having a semiconductive protective film, comprising a conductive static eliminator for removing charges remaining on the photosensitive member. apparatus.
【請求項2】 前記半導電性保護膜が導電性微粒子を含
有する請求項1記載の除電装置。
2. The static eliminator according to claim 1, wherein the semiconductive protective film contains conductive fine particles.
【請求項3】 前記導電性除電部材がローラー形状であ
る請求項1記載の除電装置。
3. The static eliminator according to claim 1, wherein the conductive static eliminator has a roller shape.
【請求項4】 前記導電性除電部材がブラシ形状である
請求項1記載の除電装置。
4. The static eliminator according to claim 1, wherein the conductive static eliminator has a brush shape.
【請求項5】 前記導電性除電部材がブレード形状であ
る請求項1記載の除電装置。
5. The static eliminator according to claim 1, wherein the conductive static eliminator has a blade shape.
【請求項6】 前記導電性除電部材が、導電性粒子中に
電極が設けられた形状である請求項1記載の除電装置。
6. The static eliminator according to claim 1, wherein the conductive static eliminator has a shape in which electrodes are provided in conductive particles.
【請求項7】 前記導電性除電部材が、磁性導電性粒子
中にマグロールが設けられた形状である請求項1記載の
除電装置。
7. The static eliminator according to claim 1, wherein the conductive static eliminator has a shape in which a mag roll is provided in magnetic conductive particles.
【請求項8】 請求項1ないし7記載の除電装置を有す
ることを特徴とする、画像形成装置。
8. An image forming apparatus comprising the static eliminator according to claim 1.
【請求項9】 請求項1ないし7記載の除電装置を有す
ることを特徴とする、反転現像方式の画像形成装置。
9. An image forming apparatus of a reversal development type, which comprises the static eliminator according to any one of claims 1 to 7.
JP33169293A 1993-12-27 1993-12-27 Destaticizing device and image forming device Pending JPH07191583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33169293A JPH07191583A (en) 1993-12-27 1993-12-27 Destaticizing device and image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33169293A JPH07191583A (en) 1993-12-27 1993-12-27 Destaticizing device and image forming device

Publications (1)

Publication Number Publication Date
JPH07191583A true JPH07191583A (en) 1995-07-28

Family

ID=18246518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33169293A Pending JPH07191583A (en) 1993-12-27 1993-12-27 Destaticizing device and image forming device

Country Status (1)

Country Link
JP (1) JPH07191583A (en)

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