JPS59224876A - Developing device - Google Patents

Developing device

Info

Publication number
JPS59224876A
JPS59224876A JP8001283A JP8001283A JPS59224876A JP S59224876 A JPS59224876 A JP S59224876A JP 8001283 A JP8001283 A JP 8001283A JP 8001283 A JP8001283 A JP 8001283A JP S59224876 A JPS59224876 A JP S59224876A
Authority
JP
Japan
Prior art keywords
toner
pipe
photoreceptor
valley
nozzle
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
JP8001283A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Ishidate
石舘 義之
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP8001283A priority Critical patent/JPS59224876A/en
Publication of JPS59224876A publication Critical patent/JPS59224876A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09Apparatus 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

PURPOSE:To prevent toner blocking from occurring at a depression part by arranging a pipe with a nozzle at the depression part between a photosensitive body and a magnet roll, and linking this pipe to a suction device. CONSTITUTION:The pipe 11 is supported while fitted in the arcuate recessed part 15 of a bracket 14, which is fixed to the front surface 4a of a front wall 4 with a screw 16; and one terminal opening part of the pipe 1 is blocked with a cap, etc., and the other opening part is linked to piping 18 connected to a vacuum device 13 through a joint 17. Then, the vacuum device 13 is driven except in a normal body cycle before the start of the copy cycle, after the completion of the copy cycle, or timing to the both. Consequently, excessive toner banking at the depression part 10 is removed suctionally from a nozzle 12 together with the air in the depression part 10 to prevent the toner from banking too much.

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全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, and a toner carrier that combines the functions of each into one. A one-component developing device is known that uses a one-component developer (toner) combined with toner to develop an electrostatic latent image on a photoreceptor into a fully visible image.

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全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
This method has advantages such as miniaturization of the device, the fact that it does not require any toner density control to control the developer density, and the cost of the device can be made low, 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、このトナーの聰立ちを感光体
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
のトナープロツキフグが発生すると、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 deposited in brush-like spikes on the mag roll, and the toner is conveyed toward the photoreceptor, and is deposited on the photoreceptor. A device that develops an electrostatic latent image into a visible image (toner image), that is, a magnetic development method. When toner blockage 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 a decrease in density and missing images (white spots). It ends up.

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の谷間部に、ノズル付きパイ
プを配設し、このパイプを吸引装置に連通して谷間部に
貯った余分なトナーを吸引して除去するようにしたもの
Structure of the invention A pipe with a nozzle is provided in the valley between the photoreceptor and the mag roll, and this pipe is communicated with a suction device to suction and remove excess toner accumulated in the valley. thing.

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、該ノ\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を有する筒形となり、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8が
マグロ−ルアと対向して設けである。
FIG. 2 is a longitudinal cross-sectional view of the whole, in which a housing 2 is disposed facing the photoconductor 1, and the housing 2 is formed by a pair of side plates 3, 3, a front wall 4, and a rear wall 5, and the photoconductor It has a cylindrical shape with an opening 6 that opens toward the photoreceptor 1, and a tuna lure is provided inside so as to slightly protrude from the opening 6 toward the photoreceptor 1. A control member 8 is provided 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
にブラシ状の穂立ちとして付着し、制御部材8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1に搬送されて感光体1上の静電潜像を可視像(
トナー像)に現像する。
The one-component magnetic toner 9 (hereinafter simply referred to as toner) in the housing 2 is attached as brush-like spikes to the tuna lure rotating in the direction of the arrow, and the control member 8 controls the amount of spikes (toner thickness). is regulated, and the toner spikes 9α are conveyed to the photoconductor 1, converting the electrostatic latent image on the photoconductor 1 into 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IO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96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 that has risen in the valley IO between the
Although some of the toner 96 gets caught up in the trimmed toner (trimmed 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 96 accumulates in the valley 10. is not desirable.

前記谷間部10には、感光体1の画像形成部とほぼ同一
長さのパイプ11が配設され、該パイプ11には谷間部
10に対向したノズル12が長手方向に間隔を置いて複
数形成しであると共に、パイプ11は吸引装置となる真
空装置13に連通しである。
A pipe 11 having approximately the same length as the image forming portion of the photoreceptor 1 is disposed in the valley portion 10, and a plurality of nozzles 12 facing the valley portion 10 are formed in the pipe 11 at intervals in the longitudinal direction. In addition, the pipe 11 is in communication with a vacuum device 13 serving as a suction device.

つまり、パイプ+1はブラケット14の円弧状凹部15
に嵌め込み支持され、ブラケット14は前壁4の前面4
αにビス16で固着しであると共に、パイプ11の一端
開口部はキャップ等で閉塞され、他端開口部は継手17
を介して、真空装置13に接続した配管18が連結しで
ある。
In other words, the pipe +1 is the arcuate recess 15 of the bracket 14.
The bracket 14 is fitted into and supported by the front surface 4 of the front wall 4.
α is fixed with a screw 16, and one end opening of the pipe 11 is closed with a cap or the like, and the other end opening is closed with a joint 17.
A pipe 18 connected to the vacuum device 13 is connected through the pipe.

しかして、コピーサイクル開始前又はコピーサイクル終
了後、あるいは両者にタイミングを合せて真空装置13
を駆動させる。つまり、通常のコピーサイクル以外の時
に真空装置13f:駆動させる。
Therefore, the vacuum device 13
drive. In other words, the vacuum device 13f is driven at times other than the normal copy cycle.

これにより、ノズル12から谷間部1oの空気とともに
谷間部!0に貯った余分なトナーを吸引して除去し、谷
間部1oに余分なトナーが貯り過ぎないようにしてトナ
ーブロッキングが発生することを未然に防止する。
As a result, the air in the valley area 1o from the nozzle 12! To prevent the occurrence of toner blocking by sucking and removing excess toner accumulated in the valley part 1o and preventing excess toner from accumulating in the valley part 1o.

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.

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

第1図は従来例の説明図、第2図は本発明の実施例を示
す全体継断面図、第3図はパイプ取付状態の分解斜視図
である。 1は感光体、2はハウジング、7はマグロール、8は制
御部材、9はトナー、10は谷間部、11はパイプ、1
2はノズル、13は吸引装置。 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図 第3 515
FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is a sectional view of the entire joint showing an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the pipe in a state in which it is attached. 1 is a photoreceptor, 2 is a housing, 7 is a mag roll, 8 is a control member, 9 is a toner, 10 is a valley part, 11 is a pipe, 1
2 is a nozzle, and 13 is a suction device. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto Figure 1 Figure 2 Figure 3 515

Claims (1)

【特許請求の範囲】[Claims] ハウシング2に、マグロ−ルアとマグロ−ルア上のトナ
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層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、ノズル12f:有するパイプ11を配設
し、該パイプ+1を吸引装置13に連通接続したことを
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 a photoreceptor layer. A developing device characterized in that a pipe 11 having a nozzle 12f is disposed in a valley 10 between the photoreceptor 1 and the tuna lure, and the pipe 11 is communicatively connected to a suction device 13.
JP8001283A 1983-05-10 1983-05-10 Developing device Pending JPS59224876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8001283A JPS59224876A (en) 1983-05-10 1983-05-10 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8001283A JPS59224876A (en) 1983-05-10 1983-05-10 Developing device

Publications (1)

Publication Number Publication Date
JPS59224876A true JPS59224876A (en) 1984-12-17

Family

ID=13706405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8001283A Pending JPS59224876A (en) 1983-05-10 1983-05-10 Developing device

Country Status (1)

Country Link
JP (1) JPS59224876A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5881338A (en) * 1995-06-29 1999-03-09 Eastman Kodak Company Contamination control device for an electrostatographic development station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5881338A (en) * 1995-06-29 1999-03-09 Eastman Kodak Company Contamination control device for an electrostatographic development station

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