JPS59224875A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS59224875A JPS59224875A JP8001183A JP8001183A JPS59224875A JP S59224875 A JPS59224875 A JP S59224875A JP 8001183 A JP8001183 A JP 8001183A JP 8001183 A JP8001183 A JP 8001183A JP S59224875 A JPS59224875 A JP S59224875A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- magnet
- photoreceptor
- trough part
- developing device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、複写機に用いられる現像装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a developing device used in a copying machine.
従来技術
現像装置としては、トナーとキャリヤとより成る二成分
現像剤を用いて感光体上の静電潜像を可視像に現像する
二成分現像装置と、トナーとキャリヤの各々の機能を1
つのトナーに併せもった一成分現像剤(トナー)を用い
て感光体上の静電潜像を可視像に現像する一成分現像装
置とが知られている。Conventional developing devices include a two-component developing device that develops an electrostatic latent image on a photoreceptor into a visible image using a two-component developer consisting of toner and carrier;
2. Description of the Related Art A one-component developing device is known that develops an electrostatic latent image on a photoreceptor into a visible image using a one-component developer (toner) combined with two toners.
そして、−成分現像装置は二成分現像装置に比較して、
装置の小型化、現像濃度をコントロールする為のトナー
の濃度コントロール制御を不要とする分だけ装置を安価
にできる、現像剤の劣化が少ないので安定した現像画質
を得られる等の利点を有する。And, compared to the two-component developing device, the -component developing device has
It has advantages such as miniaturization of the device, the cost of the device can be reduced by eliminating the need for toner density control for controlling the developer density, and stable developed image quality can be obtained because there is little deterioration of the developer.
ところで、−成分現像装置は、ハウジング内にマグロー
ルを回転自在に設け、マグロール上にトナーをブラシ状
に穂立ちさせて付着させ、このトナーの穏立ちを感光体
に向けて搬送し、感光体上の静電潜像を可視像(トナー
像)に現像するようにしたもの、つまり、磁気現像方式
%式%
しかるに、−成分現像装置に用いるトナーは、比較的容
易にかたまりをつくるブロッキング現象を呈し易く、こ
のトナーブロッキングが発生すると、その近傍ではトナ
ーの流れが妨げられ、感光体に十分なるトナーが搬送さ
れずに濃度低下、画像の抜け(白抜け)等の画像の劣化
が生じてしまう。By the way, in the negative component developing device, a mag roll is rotatably provided in a housing, toner is made to stick to the mag roll in brush-like spikes, and this loose toner is conveyed toward a photoconductor, and then the toner is deposited on the photoconductor. A device that develops an electrostatic latent image into a visible image (toner image), that is, a magnetic development method. When this toner blocking occurs, the flow of toner is obstructed in the vicinity, and not enough toner is conveyed to the photoreceptor, resulting in image deterioration such as decreased density and missing images (white spots). .
このことは、第1図において、感光体αとマグロール(
現像磁気ロール)bとの間に形成される谷間部Cに余分
にトナーが貯ってしまった時にも、トナーの流動中に各
々の衝突で発生し易く、谷間部Cにトナーブロッキング
(ブロッキングトナー)dが発生すると前述の様に画像
の劣化が生じる。This means that in Fig. 1, photoreceptor α and magroll (
Even when excess toner accumulates in the valley C formed between the developing magnetic roll) b, toner blocking (blocking toner ) When d occurs, image deterioration occurs as described above.
しかし、谷間部Cに発生したトナーブロッキングは外部
からの観察では発見し難いと共に、現像装置を取外して
確認しようとするとトナーブロッキングが複写機内に落
下してしまうので、画像劣化が生じた時に、谷間部Cに
トナーブロッキングが発生したことが原因であるかを確
認できず、他の機器を点検したすせねばならず、画像劣
化が生じた時の対応に無駄な時間を費やすことがある。However, the toner blocking that occurs in the valley C is difficult to detect by observing from the outside, and if you try to remove the developing device and check it, the toner blocking will fall into the copying machine. It cannot be confirmed whether or not the cause is toner blocking in section C, and other equipment must be inspected, which may result in wasted time dealing with image deterioration.
発明の目的
感光体とマグロールとの間の谷間部に貯った余分なトナ
ーを除去し、そのトナーが貯り過ぎないようにして谷間
部にトナーブロッキングが発生することを未然に防止で
きるようにすることを目的とする。Purpose of the Invention To remove excess toner accumulated in the valley between a photoreceptor and a mag roll, and to prevent toner blocking from occurring in the valley by preventing too much toner from accumulating. The purpose is to
発明の構成
感光体とマグロールとの間に形成される谷間部に磁石を
配設して、谷間部に余分に貯ったトナーを磁石で除去で
きるようにしたもの。Constituent structure of the invention A magnet is disposed in a valley formed between a photoreceptor and a mag roll so that excess toner accumulated in the valley can be removed by the magnet.
実施例 以下第2図以降を参照して本発明の詳細な説明する。Example The present invention will be described in detail below with reference to FIG. 2 and subsequent figures.
第2図は全体縦断面図であり、感光体1と対向してハウ
ジング2が配設され、該ハウジング2は、一対の側板3
,3と前壁4と後壁5とにより感光体1に向けて開口し
た開口部6を有する篩形となり、内部にはマグロ−ルア
が、開口部6より感光体1に向けて若干突出するように
設けであると共に、前壁4の前面4αに制御部材gがマ
グロ−ルアと対向して設けである。FIG. 2 is an overall vertical cross-sectional view, in which a housing 2 is disposed facing the photoreceptor 1, and the housing 2 is connected to a pair of side plates 3.
, 3, the front wall 4, and the rear wall 5 form a sieve shape having an opening 6 that opens toward the photoreceptor 1, and a tuna lure is inside and slightly protrudes toward the photoreceptor 1 from the opening 6. In addition, a control member g is provided on the front surface 4α of the front wall 4, facing the tuna lure.
そして、ハウジング2内の一成分磁性トナー9(以下単
にトナーとする)は、矢印方向に回転するマグロ−ルア
にブラシ状の彷立ちとして付着し、制御部材εにより穂
立量(トナー厚さ)が規制され、そのトナー穂立9αが
感光体■に搬送されて感光体「上の静電潜像を可視像(
トナー像)に現像する。Then, the one-component magnetic toner 9 (hereinafter simply referred to as toner) in the housing 2 adheres to the tuna lure rotating in the direction of the arrow as a brush-like strand, and the amount of bristle (toner thickness) is controlled by the control member ε. is regulated, and the toner spikes 9α are conveyed to the photoreceptor ``■'' and convert the electrostatic latent image on the photoreceptor ``to a visible image (
toner image).
この様な現像装置においては、マグロ−ルアと感光体1
との谷間部10に若干の盛り上った余分なトナー9bが
絶えず貯り回転していると共に、一部はトナー穂立ち(
トリミングされたトナー)に巻き込まれて現像に寄与す
るが、一部は谷間部10に溜り回転中にトナー同志が固
着しトナーブロッキングが生じるので、谷間部10に余
分なトナー9hが貯りすぎることは好ましくない。In such a developing device, the tuna lure and the photoreceptor 1
A slight amount of excess toner 9b swells up in the valley 10 between the toner and the toner 9b is constantly accumulated and rotated, and some of the toner 9b stands up (
Although some of the toner (trimmed toner) gets caught up in the toner and contributes to development, some of it accumulates in the valley 10 and the toner sticks to each other during rotation, causing toner blocking, so too much excess toner 9h accumulates in the valley 10. is not desirable.
前記谷間部10には磁石11が、トナー穂立ち9aに磁
気的悪影響を与えないように配設しである。A magnet 11 is disposed in the valley portion 10 so as not to have an adverse magnetic effect on the toner spikes 9a.
つまり、磁石11は感光体1の画像形成部長さとほぼ同
一長さの角柱体となり、前壁4の前面4aにビス12で
固着したブラケット13の上向コ字状の凹陥部14に嵌
め込み取付けられ、凹陥部14の底壁14αには開口1
5が長手方向に亘って形成しである。That is, the magnet 11 is a prismatic body with approximately the same length as the image forming length of the photoreceptor 1, and is fitted and attached to the upward U-shaped recess 14 of the bracket 13 fixed to the front surface 4a of the front wall 4 with screws 12. , an opening 1 is provided in the bottom wall 14α of the concave portion 14.
5 is formed over the longitudinal direction.
しかして、谷間部10に余分なトナー9bがある一定量
以上貯ると、その余分なトナー9bは磁石11に吸着し
て除去され、谷間部10に余分なトナー9bが貯り過ぎ
ることを防止して、谷間部10にトナーブロッキングが
発生することを未然に防止できる。When a certain amount or more of excess toner 9b accumulates in the valley portion 10, the excess toner 9b is attracted to the magnet 11 and removed, thereby preventing too much excess toner 9b from accumulating in the valley portion 10. As a result, toner blocking can be prevented from occurring in the valley portion 10.
発明の効果
感光体1とマグロ−ルアとの間の谷間部10に貯った余
分なトナーを除去し、そのトナーが貯り過ぎないように
することでトナーブロッキングの発生を未然に防止でき
る。Effects of the Invention By removing excess toner accumulated in the valley 10 between the photoreceptor 1 and the tuna lure and preventing too much toner from accumulating, toner blocking can be prevented from occurring.
第1図は従来例の説明図、第2図は本発明の実施例を示
す全体縦断面図、第3図は磁石の取行状態を示す斜視図
、第4図は第3図のy−y線断面図である。
1は感光体、2はハウジング、7はマグロール、gは制
御部材、10は谷間部、11は磁石。
出願人 富士ゼロックス株式会社
代理人 弁理士 米 原 正 章
弁理士 浜 本 忠
第1図
第2[Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an overall longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 3 is a perspective view showing a magnet taking state, and Fig. 4 is a y- It is a y-line sectional view. 1 is a photoreceptor, 2 is a housing, 7 is a mag roll, g is a control member, 10 is a valley portion, and 11 is a magnet. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto Figure 1 Figure 2 [
Claims (1)
ー穂立量を規制する制御部材8とを設け、穂立量を規制
したトナー穂立ちを感光体1に向けて搬送するようにし
た現像装置において、前記感光体1とマグロ−ルアとの
谷間部10に、感光体1の画像形成部とほぼ同一長さの
磁石11を配設したことを特徴とする現像装置。A developing device in which a housing 2 is provided with a tuna lure and a control member 8 for regulating the amount of toner spikes on the tuna lure, and the toner spikes with a regulated amount of spikes are conveyed toward the photoreceptor 1. A developing device characterized in that a magnet 11 having approximately the same length as the image forming portion of the photoreceptor 1 is disposed in a valley portion 10 between the photoreceptor 1 and the tuna lure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8001183A JPS59224875A (en) | 1983-05-10 | 1983-05-10 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8001183A JPS59224875A (en) | 1983-05-10 | 1983-05-10 | Developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59224875A true JPS59224875A (en) | 1984-12-17 |
Family
ID=13706377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8001183A Pending JPS59224875A (en) | 1983-05-10 | 1983-05-10 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59224875A (en) |
-
1983
- 1983-05-10 JP JP8001183A patent/JPS59224875A/en active Pending
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