JPS6217775A - Developing device - Google Patents

Developing device

Info

Publication number
JPS6217775A
JPS6217775A JP15787185A JP15787185A JPS6217775A JP S6217775 A JPS6217775 A JP S6217775A JP 15787185 A JP15787185 A JP 15787185A JP 15787185 A JP15787185 A JP 15787185A JP S6217775 A JPS6217775 A JP S6217775A
Authority
JP
Japan
Prior art keywords
magnet
developing
developing sleeve
developer
photosensitive body
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
JP15787185A
Other languages
Japanese (ja)
Inventor
Masakazu Fukuchi
真和 福地
Yukio Okamoto
岡本 行雄
Shinobu Soma
相馬 しのぶ
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP15787185A priority Critical patent/JPS6217775A/en
Publication of JPS6217775A publication Critical patent/JPS6217775A/en
Pending legal-status Critical Current

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  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE:To make a device compact and simple, to eliminate the sticking of carrier and to form a good copied picture with high density by tilting the position of the center of magnetic flux of a main magnet to upstream side from the position opposite to a photosensitive body. CONSTITUTION:A developing sleeve 20 having a small diameter rotates in the same direction with the face of a photosensitive body 10 on the outer circumference of a fixed magnet consisting of a main magnet 31 and auxiliary magnets 32, 33 facing the photosensitive body 10, and forms the flow of developer. The center position of magnetic flux of the magnet 31 is tilted by 2 deg.-15 deg. to upstream side from a position opposing to the photosensitive body 10. In this way, the capacity of carrying the developer to the developing area is enhanced and the sticking of the carrier on the photosensitive body 10 can be eliminated. Thus, the developing capacity is improved and a good copied picture can be formed. Further, the device can be made compact and simple by the developing sleeve having the small diameter.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は像形成体上に形成された静電潜像を現像剤を用
いて可視像化する、電子写真及び静電記録等に適用され
る現像装置の改良に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to electrophotography, electrostatic recording, etc., in which an electrostatic latent image formed on an image forming body is visualized using a developer. This invention relates to improvements in developing devices.

〔従来の技術〕[Conventional technology]

従来、磁性体を含む1成分系現像剤、あるいはトナーと
磁性体であるキャリアとを混合使用する2成分系現像剤
を用いる現像装置としては、例えば第7図に示されるよ
うな磁気ブラシ現像装置が用いられる。図において1は
矢示方向に回転する像形成体で、例えばZn(J、Se
等の感光層であり、2は非磁性の円筒体から成る現像ス
リーブで矢示方向に回転して現像剤りを現像領域Eへと
搬送する。3は磁石ロールで放射状に複数個の異極の硫
酸する。4は現像領域Eの上流側に設けられた穂立規制
部材であって、穂立が最良の条件で静電潜像の現像がな
されるよう現像剤層厚を規制する。
Conventionally, as a developing device using a one-component developer containing a magnetic material or a two-component developer using a mixture of toner and a carrier that is a magnetic material, there is a magnetic brush developing device as shown in FIG. 7, for example. is used. In the figure, 1 is an image forming body that rotates in the direction of the arrow.
2 is a developing sleeve made of a non-magnetic cylindrical body which rotates in the direction of the arrow to transport the developer to the developing area E. 3 is a magnetic roll that radially distributes sulfuric acid of different polarities. Reference numeral 4 denotes a spike regulating member provided on the upstream side of the development area E, which regulates the thickness of the developer layer so that the electrostatic latent image is developed under the best condition.

5は現像スリーブ2へ印加されるバイアス電源で、例え
ばトナー飛散や現像カブリ等を防止する直流バイアス、
6は保護抵抗である。
Reference numeral 5 denotes a bias power supply applied to the developing sleeve 2, such as a DC bias to prevent toner scattering, developing fog, etc.
6 is a protective resistance.

この磁気ブラシ現像装置では、磁石ロール3を固定し現
像スリーブ2を回転させて現像を行なう方式と、磁石ロ
ール3も回転して現像を行なう方式とがある。
In this magnetic brush developing device, there are two types: one is to fix the magnet roll 3 and rotate the developing sleeve 2 to perform development, and the other is to rotate the magnet roll 3 as well to perform development.

まだ現像スリーブの回転方向に関しても、現像領域にお
いて回転する像形成体面と回転する現像スリーブ面とが
同方向(順方向)に回転しながら現像を行なう方式と、
逆方向に回転しながら現像を行なう方式とがある。
Regarding the rotational direction of the developing sleeve, there is a method in which the rotating image forming body surface and the rotating developing sleeve surface rotate in the same direction (forward direction) in the developing area to perform development;
There is a method in which development is performed while rotating in the opposite direction.

〔発明が解決しようとする問題点) 一般に現像スリーブ2としては外径が40〜5o+II
II+程度で、磁石ロール3も6〜1o極程度のものが
用いられていた。
[Problems to be solved by the invention] Generally, the outer diameter of the developing sleeve 2 is 40 to 5o+II.
II+, and the magnet roll 3 had about 6 to 1 o poles.

しかし近時複写様業界においては、より一層小型・低コ
ストで手軽な普及機の出現が望まれている。本発明は複
写機等に組込まれて該複写機等のコンパクト化及びコス
ト低減に寄与するよう改善された現像装置で、現像スリ
ーブは小径とし、現像剤の現像領域への搬送性がすぐれ
ていて、像形成体上へのキャリア付着のない現像性にす
ぐれた、良好な複写画像を形成できる現像装置の提供を
目的とする。
However, recently, in the copying industry, there has been a desire for a more compact, low-cost, and easy-to-use popular machine. The present invention is an improved developing device that is incorporated into a copying machine, etc., and contributes to making the copying machine more compact and reducing costs.The developing sleeve has a small diameter and has excellent conveyance of developer to the developing area. An object of the present invention is to provide a developing device capable of forming a good copy image with excellent developability and no carrier adhesion on an image forming body.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

上記目的は回転する感光体に対向する主磁石及び副磁石
よりなる固定磁石体と、該磁石体の外周を前記感光体面
と順方向に回転して現像剤流を形成する小径の現像スリ
ーブを有する現像装置において、前記主磁石の磁束中l
し位置を前記感光体対向位置より上流側へ2°ないし1
5′傾けたことを特徴とする現像装置により達成される
The above object has a fixed magnet body consisting of a main magnet and a sub magnet facing a rotating photoconductor, and a small diameter developing sleeve that rotates the outer periphery of the magnet body in a forward direction relative to the surface of the photoconductor to form a developer flow. In the developing device, l in the magnetic flux of the main magnet
The position is 2° to 1° upstream from the position facing the photoreceptor.
This is achieved by a developing device characterized by being tilted 5'.

〔作へ用〕[To work]

本発明者らは9〜25rIrrn外径(「径1は直径を
意味する)の小径現像スリーブをもった現像装置につい
て研究を行なった。小径現像スリーブには次のような事
項が存在した。
The present inventors conducted research on a developing device having a small-diameter developing sleeve with an outer diameter of 9 to 25 rIrrn ("diameter 1" means diameter).The following matters existed in the small-diameter developing sleeve.

(11現像剤の搬送長すなわち現像スリーブの外周長さ
が短いこと。
(11) The conveyance length of the developer, that is, the outer circumferential length of the developing sleeve is short.

(2)  現像領域で像形成体に対向する主磁石の幅即
ち穂立ち部分の幅は広くとれないこと。
(2) The width of the main magnet facing the image forming body in the development area, that is, the width of the spiked portion cannot be made wide.

(3)現像領域では像形成体と現像スリーブとの最短間
隙位置から急激に間隙が広がること。
(3) In the developing area, the gap suddenly widens from the shortest gap position between the image forming body and the developing sleeve.

(1)に関して、磁石ロールは6〜8極等の多数磁極を
必らずしも必要としないことが実験的に明らかとなった
。上記の小径現像スリーブでは主磁極と2つの異極の搬
送用副磁極との3極の磁石ロールによって充分機能が果
たされ、3極から5極の磁石ロールが適当であるとの結
論を得た。
Regarding (1), it has been experimentally revealed that the magnet roll does not necessarily require a large number of magnetic poles, such as 6 to 8 magnetic poles. In the small-diameter developing sleeve described above, a three-pole magnetic roll consisting of a main magnetic pole and two sub-poles for conveyance of different polarities is sufficient to perform its function, and it was concluded that a three- to five-pole magnetic roll is appropriate. Ta.

第3図は現像スリーブ径と現像性との関係を示すグラフ
である。磁石ロールを3極とし、同条件としながら現像
スリーブ直径を9.15.20.25.30rrrIn
の5種について比較テストを行なった。その結果同一回
転数条件で比較すると、30IIIIllΩでは現像剤
の搬送性が低下し、コピー濃度も低下することが認めら
れた。即ち現像スリーブを小径化する場合磁石ロールの
極数を少なくすることが可能であって、逆に磁石ロール
の極数を3極とする場合、現像スリーブ外径は25M以
下好ましくは20閣とすることにより十分な現像剤の搬
送性が得られる。
FIG. 3 is a graph showing the relationship between the developing sleeve diameter and developability. The magnet roll was set to 3 poles, and the developing sleeve diameter was set to 9.15.20.25.30rrrIn while maintaining the same conditions.
A comparative test was conducted on five types. As a result, when compared under the same rotational speed conditions, it was found that at 30IIIllΩ, the developer transportability was lowered and the copy density was also lowered. That is, when reducing the diameter of the developing sleeve, it is possible to reduce the number of poles of the magnet roll, and conversely, when the number of poles of the magnet roll is 3, the outer diameter of the developing sleeve should be 25 mm or less, preferably 20 mm. This provides sufficient developer transportability.

(2)、(3)はいずれも現像条件をシビアにするもの
で、従って小径現像スリーブを用いての現像について、
多くの実験を行なった。(以下のデータは何れも現像ス
リーブ外径20閣) (a)  第4図は現像スリーブの線速度(Vr)と像
形成体の線速度(Vp)との速度比(Vr/Vp)と像
形成体上へのトナー付着の状況を示したもので、Vr 
/ Vp ) 3では飽和状態にある。なおこの実験で
は像形成体と現像スリーブとの回転方向は同方向とした
。複数本のカーブはそれぞれ現像領域及び穂切規制板部
分でのギャップを異にしての比較である。
(2) and (3) both require severe development conditions, so for development using a small diameter development sleeve,
Conducted many experiments. (The following data are all about the outside diameter of the developing sleeve. This shows the state of toner adhesion on the forming body, and Vr
/Vp) 3, it is in a saturated state. In this experiment, the image forming body and the developing sleeve were rotated in the same direction. The plurality of curves are compared with different gaps in the development area and the ear cutting regulating plate portion.

(b)  第5図は現像領域で像形成体と対向する主磁
極(N)の磁束密度と現像性との関係を示したもので、
現像性の指標として現像時に像形成体に付着したキャリ
ア個数をもって表示した。現像バイアスを変化させても
700ガウス以上では有意差は認められなかった。上記
テストは主磁極を現像領域に正対(マグネットアングル
θ=0)させて得たもので、主磁極(N)の磁束密度を
700ガウス以上としても、その現像性能は満足される
ものではなかった。
(b) Figure 5 shows the relationship between the magnetic flux density of the main magnetic pole (N) facing the image forming body in the development area and the developability.
As an index of developability, the number of carriers attached to the image forming body during development was expressed. Even when the developing bias was changed, no significant difference was observed at 700 Gauss or higher. The above test was conducted with the main magnetic pole directly facing the development area (magnetic angle θ = 0), and even if the magnetic flux density of the main magnetic pole (N) was 700 Gauss or more, the developing performance was not satisfactory. Ta.

(C)  第6図は主磁極の磁束密度を750ガウスと
し、主磁極を正対位置からふらせた角度位置でのキャリ
ア付着量を示したものである。なおマグネットアングル
θは、第2図に示したもので、現像スリーブの回転方向
に対して上流側を(ト)、下流側を←)としている。第
6図のテストカーブは、主磁石のマグネットアングルθ
の許容レベルは+2〜+15の範囲にあることを必要と
し、+5付近が好ましいことを示している。
(C) FIG. 6 shows the amount of carrier adhesion at an angular position where the main magnetic pole is deviated from the directly facing position, with the magnetic flux density of the main magnetic pole being 750 Gauss. The magnet angle θ is shown in FIG. 2, with the upstream side being (g) and the downstream side being ←) with respect to the rotational direction of the developing sleeve. The test curve in Figure 6 is based on the magnet angle θ of the main magnet.
It is necessary that the permissible level is in the range of +2 to +15, and a value around +5 is preferable.

許容レベルとは、キャリア付着による転写の悪影響(画
像抜けなどの転写不良)あるいは、クリーニングにせき
止められることにする感光体へのキズ発生あるいは、現
像剤交換時までにキャリア量が必要量以下になるこ・と
などから総合的に判断されるレベルのことである。
The acceptable level refers to adverse effects on transfer due to carrier adhesion (transfer defects such as image dropouts), scratches on the photoreceptor that will be stopped by cleaning, or the amount of carrier falling below the required amount by the time the developer is replaced. This is a level that is judged comprehensively based on this and other factors.

〔実施例〕〔Example〕

第1図は本発明の実施例を示す現像装置の要部断面図で
、第2図は第1図の現像装置を取付けた複写機を示して
いる。本発明の実施例でマグネットアングルθを種々の
角度について対比しているが、比較に先だって共通の事
項について説明する。
FIG. 1 is a sectional view of essential parts of a developing device showing an embodiment of the present invention, and FIG. 2 shows a copying machine to which the developing device of FIG. 1 is installed. In the embodiments of the present invention, various magnet angles θ are compared, but prior to the comparison, common matters will be explained.

10は像形成体で、次の構成をもった径50叫σの有機
感光体で矢示方向に20Orpmで回転する。
Reference numeral 10 denotes an image forming body, which is an organic photoreceptor having the following configuration and having a diameter of 50 mm and rotates at 20 rpm in the direction of the arrow.

(有機感光体の構成) 支 持 体・・・・・・・・・・・・アルミニウム製5
0rxxBドラム中 間 層・・・・・・・・・・・・
塩化ビニル−酢酸ビニル共重合体(0,1μm厚) 電荷輸送層・・・・・・・・・・・・トリフェニルアミ
ノスチリルをポリカーボネートに分散し た層(20μm厚) 電荷発生層・・・・・・・・・・・・ビスアゾ顔料をポ
リカーボネ   ′−トに分散した層(数μm厚) 以上の各層を順次積層してなる正帯電性感光体りは2成
分系現像剤で下記の構成をもつ。
(Structure of organic photoreceptor) Support: Made of aluminum 5
0rxxB drum middle layer・・・・・・・・・・・・
Vinyl chloride-vinyl acetate copolymer (0.1 μm thick) Charge transport layer・・・・・・・・・Layer in which triphenylaminostyryl is dispersed in polycarbonate (20 μm thick) Charge generation layer・・・・・・・・・・・・A layer in which bisazo pigment is dispersed in polycarbonate (several μm thick) The positively charging photoreceptor, which is made by sequentially laminating each of the above layers, is a two-component developer with the following composition. Motsu.

(現像剤の構成) ト す −・・・・・・・・・・・・スチレンアクリル
樹脂中にカーボンブラックを7重1°−分 散含有し、かつ疎水性シリカ を0.4重量%外添した平均粒径 12μmの負帯電性トナー。
(Composition of developer) - Contains carbon black 7 times 1° dispersed in styrene acrylic resin, and externally adds 0.4% by weight of hydrophobic silica. Negatively chargeable toner with an average particle size of 12 μm.

キャ リア・・・・・・・・・・・・70μm径のフェ
ライト粒子にスチレンアクリル樹脂をコー トした平均粒径70μmのキャ リ ア 現 像 剤・・・・・・・・・・・・95重量%の前記
キャリアと5重量%の前記トナーを混合し たもの。
Carrier: 70 μm diameter ferrite particles coated with styrene acrylic resin. Carrier developer: 70 μm average particle size. 95 weight. % of said carrier and 5% by weight of said toner.

(磁界測定法) 磁力の測定は横河北辰電機製ガウスメーター(ガウスメ
ーター3251、プローブ3252−01 )を用い、
測定値は現像スリーブ表面から2咽離れた位置にホール
素子をセンサにもつプローブを配置し、測定を行なった
(Magnetic field measurement method) Magnetic force was measured using a Gauss meter manufactured by Yokogawa Hokushin Electric (Gauss meter 3251, probe 3252-01).
The measured values were measured by placing a probe having a Hall element as a sensor at a position two degrees away from the surface of the developing sleeve.

20はアルミニウムを材料とする肉厚1mmの薄肉円筒
の現像スリーブで、外面はサンドブラスト(を30)に
よって粗面としたものである。矢示方向に像形成体10
の線速度vpに対し、第3図に示したデータにもとすい
て約3.3 Vl)の周速度で回転する。
Reference numeral 20 denotes a thin cylindrical developing sleeve made of aluminum and having a wall thickness of 1 mm, the outer surface of which is roughened by sandblasting (30). Image forming body 10 in the direction of the arrow
According to the data shown in FIG. 3, it rotates at a circumferential speed of about 3.3 Vl) relative to the linear velocity vp of .

30は磁石ロールで、固定しアルミニウム製のロール3
4に、N極(N)を外方にもった主磁石31と、現像剤
搬送用のS極(Sl、S2)を外方にもった副磁石32
.33を一体成形したものである。ここで主磁極Nは幅
8IIO111厚み6順の断面形状のもので、副磁極S
1、S2は幅5閣、厚み4mmの断面形状のものである
。N極及びS、、S2極の極配置関係は、NS。
30 is a magnetic roll, fixed and aluminum roll 3
4, a main magnet 31 with a north pole (N) on the outside, and a sub magnet 32 with a south pole (Sl, S2) for developer transport on the outside.
.. 33 is integrally molded. Here, the main magnetic pole N has a cross-sectional shape in the order of width 8IIO111 and thickness 6, and the sub magnetic pole S
1. S2 has a cross-sectional shape of 5 mm in width and 4 mm in thickness. The pole arrangement relationship between the N pole and S, S2 poles is NS.

間140°NS2間140°の角度位置にあって、主磁
石31は現像スリーブ20表面において700ガウス、
副磁石32.33は共に400ガウスとしている。
The main magnet 31 is located at an angular position of 140° between 140° and 140° between NS2 and 700 Gauss on the surface of the developing sleeve 20.
The sub magnets 32 and 33 are both set to 400 Gauss.

40は穂立規制部材であって、像形成体10同面と0.
51mの間隙をもっゝてセットする。一方像形成体10
と現像スリーブ20との現像領域Eにおける間隙は0.
51 teaとする。穂立規制部材40は、主磁石31
と副磁石32との間にあり、副磁石32と2Cの角度位
置とした。なお上記の25′の角度位置は、その前後に
穂立規制部材40を移動させて設けた時との対比におい
て最良の角度位置であって、穂立規制部材40と現像ス
リーブ20との間隙は上記以外各[(0,4〜0.6+
m )変化させても、良好な現像剤密度をもって現像剤
の搬送がなされる。
Reference numeral 40 denotes a spike control member, which is placed on the same surface as the image forming body 10 and 0.
Set with a gap of 51m. On the other hand, the image forming body 10
The gap between the developing sleeve 20 and the developing area E is 0.
51 tea. The spike control member 40 is connected to the main magnet 31
and the sub-magnet 32, and was at the angular position of the sub-magnet 32 and 2C. Note that the above angular position 25' is the best angular position in comparison with the case where the ear stand regulating member 40 is moved back and forth, and the gap between the ear stand regulating member 40 and the developing sleeve 20 is Each other than the above [(0,4~0.6+
m) The developer is transported with good developer density even when the developer density is changed.

52は攪拌手段で、径30mmの楕円羽根で、現像スリ
ーブ20と同方向に200「・p−mで回転し、ケーシ
ング51内の現像剤De及び補給トナーTを攪拌混合し
て均一な混合状態の現像剤とし、現像スリーブ20へと
供給する。ケーシング51と攪拌手段52とは2.5N
Inの間隙を設けである。
Reference numeral 52 denotes a stirring means, which is an elliptical blade with a diameter of 30 mm and rotates at a speed of 200 mm in the same direction as the developing sleeve 20, stirring and mixing the developer De and replenishment toner T in the casing 51 to achieve a uniform mixing state. The developer is supplied to the developing sleeve 20.The casing 51 and stirring means 52 are
A gap of In is provided.

53はトナーホッパで、内部のトナーTを補給ローラ5
4によって供給するようにしたもので、ケーシング51
内の現像剤を常に一定のトナー濃度とする。
53 is a toner hopper, and the internal toner T is supplied to the replenishment roller 5.
4, and the casing 51
The developer inside the printer is always kept at a constant toner concentration.

ケーシング51内には山形突起55が設けられていて、
現像領域Eで現像をおえだ現像剤は山形突起55によゆ
ガイドされ、前記攪拌手段52へと搬送され、攪拌混合
がなされる。
A chevron-shaped protrusion 55 is provided inside the casing 51,
The developer that has been developed in the development area E is guided by the chevron-shaped protrusion 55 and conveyed to the stirring means 52, where it is stirred and mixed.

以上説明した現像装置50を取付けた複写機の断面図を
示したのが第2図で、図中61は帯電器、62は原稿台
ガラス、63は集束性光伝送体、64は光源、65は転
写前帯電器、66は転写器、67は分離器、68は熱ロ
ーラ定着器、69はクリーニング前除電装置、70はク
リーニング装置で、71は該装置内のりIJ−ユング用
ブレードである。
FIG. 2 shows a cross-sectional view of a copying machine equipped with the developing device 50 described above, in which 61 is a charger, 62 is a document table glass, 63 is a focusing light transmitter, 64 is a light source, and 65 66 is a transfer device, 67 is a separator, 68 is a heat roller fixing device, 69 is a pre-cleaning static eliminator, 70 is a cleaning device, and 71 is a blade for IJ-Jung in the device.

矢示方向に回転する像形成体10はまず帯電器61によ
って+600 Vの一様な帯電が付与される。次いで前
記帯電面には原稿台ガラス62上の原稿Dl、を光源6
4で光走査した反射光を前記光伝送体63で集束して得
られる像露光が施されて静電像が形成される。この静電
像は前記の現像装置50により現像されトナー像となる
The image forming body 10 rotating in the direction of the arrow is first uniformly charged at +600 V by the charger 61. Next, the original Dl on the original platen glass 62 is placed on the charging surface by the light source 6.
The reflected light optically scanned in step 4 is focused by the optical transmitter 63, and image exposure is performed to form an electrostatic image. This electrostatic image is developed by the aforementioned developing device 50 and becomes a toner image.

以上の共通条件下で、現像スリーブ20の外径(Dmm
)、主磁石31のマグネットアングルθについ1て、各
種の組合せで試作・組付を行ないテストを上記評価で、
前段の評価はキャリア付着による評価であり、後段の評
価はトナー濃度等による画像評価である。キャリア付着
は、転写・クリユング等に際して像形成体を傷め、クリ
ーング性能を悪化し、キャリア消費量が大きい等の欠陥
となる。
Under the above common conditions, the outer diameter (Dmm) of the developing sleeve 20
), Regarding the magnet angle θ of the main magnet 31, we conducted prototype production and assembly tests in various combinations, and based on the above evaluation,
The first evaluation is an evaluation based on carrier adhesion, and the second evaluation is an image evaluation based on toner density and the like. Carrier adhesion damages the image forming body during transfer, cleaning, etc., deteriorates cleaning performance, and causes defects such as a large amount of carrier consumption.

このような結果から、小径現像スリーブについては、マ
グネットアングル+2〜15の間にあり、+5は最も好
ましいマグネットアングルであることを示している。
These results show that for the small-diameter developing sleeve, the magnet angle is between +2 and +15, with +5 being the most preferable magnet angle.

以上、本発明による現像装置の説明を行なったが、本発
明に用いられる像形成体としては、金属または導電化さ
れたプラスチック等の基体上に必要により中間層を設け
、この上にZn 、l! 、 Sb 、 Cd、Mす、
Hgの酸化物、沃化物、硫化物、セレン化物等の光導電
物質をバインダー樹脂中に分散した感光層、Se 、 
S iもしくはSeと’I’e、Sb、Bi等トノ合金
を蒸着した感光層または有機感光層を設けたものがある
。また前記有機感光体としては、ペリレン誘導体、クロ
ルダイアンブルー、メチルスカリリウム、ビスアゾ顔料
、多環顔料等の有機光導電物質を必要により樹脂中に分
散した電荷発生層と、オキサジアゾール誘導体、ピラゾ
リン誘導体、ポリアリールアルカン系芳香族アミン化合
物、ポリビニルカルバゾール等を必要により樹脂中に溶
解または分散した電荷輸送層とから成る。正帯電性また
は負帯電性の複合感光体がある。本発明は之等の何れの
感光体にも適用されるものである。
The developing device according to the present invention has been described above, but as an image forming body used in the present invention, an intermediate layer is provided as necessary on a base material such as metal or conductive plastic, and Zn, l, etc. ! , Sb, Cd, Msu,
A photosensitive layer in which a photoconductive substance such as Hg oxide, iodide, sulfide, selenide, etc. is dispersed in a binder resin, Se,
There are those provided with a photosensitive layer or an organic photosensitive layer in which Si or Se and an alloy such as 'I'e, Sb, or Bi are deposited. The organic photoreceptor may include a charge generation layer in which an organic photoconductive substance such as a perylene derivative, chlordian blue, methylskarylium, bisazo pigment, or polycyclic pigment is dispersed in a resin, and an oxadiazole derivative or pyrazoline. It consists of a charge transport layer in which derivatives, polyarylalkane-based aromatic amine compounds, polyvinyl carbazole, etc. are dissolved or dispersed in a resin as necessary. There are composite photoreceptors that are positively chargeable or negatively chargeable. The present invention is applicable to any of these photoreceptors.

また現像剤に関しても前記のものに限定されるものでは
なく、l成分系現像剤に対しても適用されるものである
Further, the developer is not limited to the above-mentioned ones, but can also be applied to l-component type developers.

また穂立規制部材と現像スリーブとの間隙及び現像スリ
ーブと像形成体との間隙についても本実施例に限定され
るものではない。之等に関しても最適の間隙値は0.1
〜1.2 rrrmの範囲にあることが好ましい。
Furthermore, the gap between the spike control member and the developing sleeve and the gap between the developing sleeve and the image forming body are not limited to those in this embodiment. The optimum gap value is 0.1 for these as well.
It is preferably in the range of ~1.2 rrrm.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明の現像装置によれば、装置は
従来になくコンパクトで低コストとなり、キャリア付着
は殆んど認められないで、しかも高濃度で良質の複写画
像が得られる等の効果が生じることとなった。
As explained above, according to the developing device of the present invention, the device is more compact and cost-effective than ever before, and there is almost no carrier adhesion, and high-density, high-quality copied images can be obtained. This resulted in the occurrence of

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

第1図は本発明の一実施例を示す現像装置断面図。 第2図は第1図の現像装置を取付けた複写機の断面図。 第3図はスリーブ径とコピー製置の関係を示すグラフ。 第4図はvr/vpとトナー付着との関係を示すグラフ
。 第5図は磁束密度とトナー付着量との関係を示すグラフ
。 第6図はマグネットアングルとキャリア付着量の関係を
示すグラフ。 第7図は従来の現像装置の断面図。 10・・・・・・像形成体  20・・・・・・現像ス
リーブ30・・・・・・磁石ロール 31・・・・・・
主磁石32.33・・・副磁石34・・・・・・ロール
40・・・・・・穂立規制部材 51・・・・・・ケー
シング52・・・・・・攪拌手段  De・・・・・・
現像剤E・・・・・・現像領域   θ・・・・・・マ
グネットアングル出願人  小西六写真工業株式会社 第1図 第3図 一−スリーフ゛全仁 V/vρ Ji li’JIIL (xloOG)マグ享、トアン
ク゛ル(e)
FIG. 1 is a sectional view of a developing device showing an embodiment of the present invention. FIG. 2 is a sectional view of a copying machine equipped with the developing device shown in FIG. 1. FIG. 3 is a graph showing the relationship between sleeve diameter and copy production. FIG. 4 is a graph showing the relationship between vr/vp and toner adhesion. FIG. 5 is a graph showing the relationship between magnetic flux density and toner adhesion amount. FIG. 6 is a graph showing the relationship between magnet angle and carrier adhesion amount. FIG. 7 is a sectional view of a conventional developing device. 10... Image forming body 20... Development sleeve 30... Magnet roll 31...
Main magnet 32, 33... Sub-magnet 34... Roll 40... Ear standing regulating member 51... Casing 52... Stirring means De... ...
Developer E... Development area θ... Magnet angle Applicant Konishi Roku Photo Industry Co., Ltd. Touankuru (e)

Claims (3)

【特許請求の範囲】[Claims] (1)回転する感光体に対向する主磁石及び副磁石より
なる固定磁石体と、該磁石体の外周を前記感光体面と順
方向に回転して現像剤流を形成する小径の現像スリーブ
を有する現像装置において、前記主磁石の磁束中心位置
を前記感光体対向位置より上流側へ2°ないし15°傾
けたことを特徴とする現像装置。
(1) It has a fixed magnet body consisting of a main magnet and a sub-magnet that faces the rotating photoconductor, and a small-diameter developing sleeve that rotates the outer periphery of the magnet body in the forward direction relative to the photoconductor surface to form a developer flow. A developing device characterized in that the magnetic flux center position of the main magnet is tilted 2° to 15° upstream from a position facing the photoreceptor.
(2)前記小径の現像スリーブは9mmないし25mm
の外径を有することを特徴とする特許請求の範囲第1項
記載の現像装置。
(2) The small diameter developing sleeve is 9 mm to 25 mm.
The developing device according to claim 1, having an outer diameter of .
(3)前記固定磁石体は、主磁極と之と異極の2つの副
磁極とからなる3極の固定磁石体であることを特徴とす
る特許請求の範囲第1項又は第2項記載の現像装置
(3) The fixed magnet body is a three-pole fixed magnet body consisting of a main magnetic pole and two sub-magnetic poles of different polarities. developing device
JP15787185A 1985-07-16 1985-07-16 Developing device Pending JPS6217775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15787185A JPS6217775A (en) 1985-07-16 1985-07-16 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15787185A JPS6217775A (en) 1985-07-16 1985-07-16 Developing device

Publications (1)

Publication Number Publication Date
JPS6217775A true JPS6217775A (en) 1987-01-26

Family

ID=15659225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15787185A Pending JPS6217775A (en) 1985-07-16 1985-07-16 Developing device

Country Status (1)

Country Link
JP (1) JPS6217775A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02109368U (en) * 1989-02-17 1990-08-31
JPH0328860A (en) * 1989-06-27 1991-02-07 Mita Ind Co Ltd High-definition development method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186768A (en) * 1982-04-24 1983-10-31 Canon Inc Developing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186768A (en) * 1982-04-24 1983-10-31 Canon Inc Developing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02109368U (en) * 1989-02-17 1990-08-31
JPH0328860A (en) * 1989-06-27 1991-02-07 Mita Ind Co Ltd High-definition development method

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