JPH03256083A - Magnetic brush developing device - Google Patents

Magnetic brush developing device

Info

Publication number
JPH03256083A
JPH03256083A JP5560690A JP5560690A JPH03256083A JP H03256083 A JPH03256083 A JP H03256083A JP 5560690 A JP5560690 A JP 5560690A JP 5560690 A JP5560690 A JP 5560690A JP H03256083 A JPH03256083 A JP H03256083A
Authority
JP
Japan
Prior art keywords
magnetic roller
developer
magnetic
development
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
Application number
JP5560690A
Other languages
Japanese (ja)
Inventor
Takeshi Kishimoto
健 岸本
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5560690A priority Critical patent/JPH03256083A/en
Publication of JPH03256083A publication Critical patent/JPH03256083A/en
Pending legal-status Critical Current

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  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は電子写真方式を用いた複写機やプリンタにお
ける磁気ブラシ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 magnetic brush developing device for a copying machine or printer using an electrophotographic method.

［従来の技術］ 第２図は従来の磁気ブラシ現像装置を示す断面図であり
、図において、（１）は先に現像を行う逆方向現像用磁
気ローラ、（２）は後に現像を行う順方向現像用磁気ロ
ーラ、（３）は上記両現像用磁気ローラに現像剤を供給
する搬送用磁気ローラ、（４）は静電潜像が形成されて
いる感光体、（５）は現像剤、（６）は現像容器、（７
）は現像剤の整形をする整形部材、（８）は現像剤の循
環流量を規制する流量規制部材、（９）は現像剤の流れ
を案内する案内部材、（１０）は現像剤を攪拌する左方
向攪拌軸、（１１）は同じく右方向攪拌軸である。[Prior Art] Fig. 2 is a sectional view showing a conventional magnetic brush developing device. In the figure, (1) is a magnetic roller for reverse direction development that performs development first, and (2) is a magnetic roller that performs development later. A magnetic roller for directional development, (3) a conveying magnetic roller that supplies developer to both of the magnetic rollers for development, (4) a photoreceptor on which an electrostatic latent image is formed, (5) a developer, (6) is a developing container, (7
) is a shaping member that shapes the developer, (8) is a flow rate regulation member that regulates the circulating flow rate of the developer, (9) is a guide member that guides the flow of the developer, and (10) is agitated the developer. The left stirring shaft (11) is also a right stirring shaft.

次に動作について説明する。Next, the operation will be explained.

現像容器（６）に収納された現像剤（５）は左方向攪拌
軸（１０）及び右方向攪拌軸（１１）によって攪拌され
た後、流量規制部材（８）によって循環流量を規制され
ながら搬送用磁気ローラ（３）に吸着され、図において
時計方向に搬送される。さらに搬送用磁気ローラ（３）
の上方で整形部材（７）によって逆方向現像用磁気ロー
ラ（１）の方向と順方向現像用磁気ローラ（２）の方向
に分岐させられる。逆方向現像用磁気ローラ（１）に吸
着した現像剤（５）は図において時計方向に搬送され、
図において時計方向に回転している感光体（４）上の静
電潜像とすれちがい接触し現像が行われ、現像後室内部
材（９）によってもとの攪拌部に戻される。一方順方向
現像用磁気ローラ（２）に吸着した現像剤（５）は図に
おいて反時計方向に搬送され、感光体（４）上の静電潜
像と追越し接触し現像か行われ、現像後搬送用磁気ロー
ラ（３）上の現像剤（５）と合流し再び順方向現像用磁
気ローラ（２）に吸着される。The developer (5) stored in the developer container (6) is stirred by the left stirring shaft (10) and the right stirring shaft (11), and then transported while the circulation flow rate is regulated by the flow rate regulating member (8). It is attracted to the magnetic roller (3) and conveyed clockwise in the figure. Furthermore, the magnetic roller for conveyance (3)
Above it, the shaping member (7) branches into the direction of the magnetic roller for reverse development (1) and the direction of the magnetic roller for forward development (2). The developer (5) adsorbed to the magnetic roller (1) for reverse direction development is conveyed clockwise in the figure.
In the figure, the electrostatic latent image on the photoreceptor (4), which is rotating clockwise, is brought into passing contact and development is performed, and after development, it is returned to the original stirring part by the indoor member (9). On the other hand, the developer (5) adsorbed to the magnetic roller (2) for forward development is conveyed counterclockwise in the figure, overtakes and comes into contact with the electrostatic latent image on the photoreceptor (4), and development is performed. It merges with the developer (5) on the conveying magnetic roller (3) and is again attracted to the forward developing magnetic roller (2).

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の磁気ブラシ現像装置は以上のように構成されてい
たので、順方向現像用磁気ローラに付着していた現像後
の現像剤が搬送用磁気ローラに吸着している現像前の現
像剤と合流するさい、充分に混じり合わずそのまま順方
向現像用磁気ローラに吸着されて現像部まで搬送され局
部的に循環な繰り返すため、現像品質の低下を招くなど
の問題点があった。Since the conventional magnetic brush developing device was configured as described above, the developed developer adhering to the forward development magnetic roller merges with the undeveloped developer adsorbed to the transporting magnetic roller. During the process, the toner particles are not sufficiently mixed and are attracted to the forward developing magnetic roller, transported to the developing section, and locally circulated repeatedly, resulting in problems such as deterioration in developing quality.

この発明は上記のような問題点を解消するためになされ
たもので、二本の現像用磁気ローラに同一の現像剤を供
給できるとともに、現像剤全体を効率よく循環し現像剤
の寿命を長くすることかできる磁気ブラシ現像装置を得
ることを目的とする［課題を解決するための手段］ この発明に係わる磁気ブラシ現像装置は、順方向現像用
磁気ローラと搬送用磁気ローラの現像剤供給側の間隙に
攪拌機構を設け、順方向現像用磁気ローラに付着してい
た現像後の現像剤と搬送用磁気ローラに吸着している現
像前の現像剤を攪拌した後、順方向現像用磁気ローラ及
び逆方向現像用磁気ローラに同一の現像剤を供給するよ
うにしたものである。This invention was made in order to solve the above-mentioned problems.It is possible to supply the same developer to two magnetic developing rollers, and it also makes it possible to efficiently circulate the entire developer, thereby extending the life of the developer. [Means for Solving the Problems] A magnetic brush developing device according to the present invention has a magnetic brush developing device that can perform A stirring mechanism is provided in the gap, and after stirring the developed developer adhering to the forward developing magnetic roller and the undeveloped developer adsorbed to the conveying magnetic roller, the forward developing magnetic roller The same developer is supplied to the magnetic roller for reverse direction development.

〔作用］ この発明における磁気ブラシ現像装置は、順方向現像用
磁気ローラと搬送用磁気ローラの現像剤供給側の間隙に
設けた攪拌機構により順方向現像用磁気ローラに付着し
ていた現像後の現像剤と搬送用磁気ローラに吸着してい
る現像前の現像剤を攪拌する。[Function] The magnetic brush developing device according to the present invention uses a stirring mechanism provided in the gap between the forward developing magnetic roller and the conveying magnetic roller on the developer supply side to remove the post-developed material that has adhered to the forward developing magnetic roller. The developer and the developer adsorbed on the conveyance magnetic roller before development are stirred.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。第１
図において、（１）から（１１）までは従来例と同様で
ある。（１２）は現像剤（５）を攪拌する攪拌軸である
。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, steps (1) to (11) are the same as in the conventional example. (12) is a stirring shaft for stirring the developer (5).

次に動作について説明する。Next, the operation will be explained.

現像剤（５）が現像部まで搬送されるところまでは従来
例と同様である。現像後、順方向現像用磁気ローラ（２
）に付着していた現像後の現像剤（５）は図において反
時計方向に回転する攪拌軸（１２）によって順方向現像
用磁気ローラ（２）から強制的に分離させられる。一方
、搬送用磁気ローラ（３）に吸着していた現像前の現像
剤（５）も同様に攪拌軸（１２）によって強制的に分離
させられる。ここで、現像後と現像前の現像剤の混合攪
拌が行われる。これにより現像剤が均一になり同一のも
のが順方向現像用磁気ローラ（２）と逆方向現像用磁気
ローラ（１）に供給されることになる。The process up to the point where the developer (5) is transported to the developing section is the same as in the conventional example. After development, use the magnetic roller for forward development (2
) is forcibly separated from the forward developing magnetic roller (2) by the stirring shaft (12) which rotates counterclockwise in the figure. On the other hand, the undeveloped developer (5) adsorbed on the conveying magnetic roller (3) is also forcibly separated by the stirring shaft (12). Here, the developer after development and before development are mixed and stirred. This makes the developer uniform and the same developer is supplied to the forward developing magnetic roller (2) and the reverse developing magnetic roller (1).

［発明の効果］ 以上のように、この発明によれば、順方向現像用磁気ロ
ーラと搬送用磁気ローラの現像剤供給側の間隙に攪拌機
構を設けるように構成したので、二本の現像用磁気ロー
ラに同一の現像剤が供給され安定した現像品質が得られ
、現像剤の寿命か長いものが得られる効果かある。[Effects of the Invention] As described above, according to the present invention, since the stirring mechanism is provided in the gap between the forward developing magnetic roller and the conveying magnetic roller on the developer supply side, the two developing magnetic rollers Since the same developer is supplied to the magnetic roller, stable development quality can be obtained, and the life of the developer can be extended.

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

第１図はこの発明の一実施例による磁気ブラシ現像装置
を示す断面図、第２図は従来の磁気ブラシ現像装置を示
す断面図である。 図において（１）は逆方向現像用磁気ローラ、（２）は
順方向現像用磁気ローラ、（３）は搬送用磁気ローラ、
（４）は感光体、（５）は現像剤（６）は現像容器、（
７）は整形部材、（８）は流量規制部材、（９）は案内
部材、（１０）は左方向攪拌軸、（１１）は右方向攪拌
軸、（１２） は攪拌軸である。 なお、 図中、 同一符号は同一 または相当部分 を示す。FIG. 1 is a sectional view showing a magnetic brush developing device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional magnetic brush developing device. In the figure, (1) is a magnetic roller for reverse direction development, (2) is a magnetic roller for forward direction development, (3) is a magnetic roller for conveyance,
(4) is a photoreceptor, (5) is a developer, (6) is a developer container, (
7) is a shaping member, (8) is a flow rate regulating member, (9) is a guide member, (10) is a left stirring shaft, (11) is a right stirring shaft, and (12) is a stirring shaft. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims] （１）固定した磁石の外周を非磁性スリーブを回転させ
る磁気ローラを感光体に対向して配設しその間隙に現像
剤を循環させ、感光体上の静電潜像を現像する磁気ブラ
シ現像装置において、先に潜像を現像する逆方向現像用
磁気ローラと後に潜像を現像する順方向現像用磁気ロー
ラ、順方向現像用磁気ローラと逆方向に回転し該両磁気
ローラの間から現像領域に現像剤を送出する搬送用磁気
ローラおよび順方向現像用磁気ローラと搬送用磁気ロー
ラの現像剤供給側の間隙に攪拌機構を備えたことを特徴
とする磁気ブラシ現像装置。(1) Magnetic brush development in which a magnetic roller that rotates a non-magnetic sleeve around the outer periphery of a fixed magnet is disposed facing the photoreceptor, and developer is circulated through the gap to develop the electrostatic latent image on the photoreceptor. In the apparatus, there is a magnetic roller for reverse development that first develops the latent image, a magnetic roller for forward development that develops the latent image later, and a magnetic roller that rotates in the opposite direction to the magnetic roller for forward development and develops from between the two magnetic rollers. What is claimed is: 1. A magnetic brush developing device comprising: a conveyance magnetic roller for delivering developer to a region; and a stirring mechanism in a gap between the forward development magnetic roller and the conveyance magnetic roller on the developer supply side.
JP5560690A 1990-03-06 1990-03-06 Magnetic brush developing device Pending JPH03256083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5560690A JPH03256083A (en) 1990-03-06 1990-03-06 Magnetic brush developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5560690A JPH03256083A (en) 1990-03-06 1990-03-06 Magnetic brush developing device

Publications (1)

Publication Number Publication Date
JPH03256083A true JPH03256083A (en) 1991-11-14

Family

ID=13003429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5560690A Pending JPH03256083A (en) 1990-03-06 1990-03-06 Magnetic brush developing device

Country Status (1)

Country Link
JP (1) JPH03256083A (en)

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