JPS63118170A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS63118170A JPS63118170A JP61262680A JP26268086A JPS63118170A JP S63118170 A JPS63118170 A JP S63118170A JP 61262680 A JP61262680 A JP 61262680A JP 26268086 A JP26268086 A JP 26268086A JP S63118170 A JPS63118170 A JP S63118170A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- blade
- developer
- developer carrier
- 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
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 abstract description 7
- 108091008695 photoreceptors Proteins 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Dry Development 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、電子写真方式を採用した複写機等の現像装置
に関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a developing device such as a copying machine that employs an electrophotographic method.
「従来の技術」
いわゆるゼログラフィ方式と呼ばれる電子写真方式を採
用した複写機においては、第４図に示すように、感光体
１の外周面をクリーニング装置２がクリーニングし、帯
電器３で一様に帯電した後、露光装置４で露光して、感
光体１上に静電潜像を形成する。この静電潜像を現像器
５で現像し、転写器６により複写用紙７に転写して図示
しない定着装置で定着処理してコピーを得る。``Prior Art'' In a copying machine that employs an electrophotographic method called a so-called xerography method, as shown in FIG. After being charged, an exposure device 4 exposes the photoreceptor 1 to form an electrostatic latent image on the photoreceptor 1. This electrostatic latent image is developed by a developing device 5, transferred onto copy paper 7 by a transfer device 6, and fixed by a fixing device (not shown) to obtain a copy.
この現像器５は一成分現像方式を採用しており、導電性
磁気トナーを収容したトナーホッパー１１中に、トナー
を攪拌するアジテータ１２と、トナーを外周面に一様に
付着させてこれを担持するスリーブ１３（現像剤担持体
）とが設けられている。This developing device 5 adopts a one-component developing method, and includes an agitator 12 that stirs the toner in a toner hopper 11 containing conductive magnetic toner, and an agitator 12 that uniformly adheres the toner to the outer peripheral surface and supports it. A sleeve 13 (developer carrier) is provided.
アジテータ１２により攪拌されたトナーがこのスリーブ
１３に向けて送られると、スリーブ１３の外周面に磁気
によってトナーが付着する。このトナーは、スリーブ１
３の外周面に軽く接するように押し付けられたブレード
１４によって、その厚さが調整されてから、感光体１の
静電潜像に対向する側に送り込まれる。When the toner agitated by the agitator 12 is sent toward the sleeve 13, the toner adheres to the outer peripheral surface of the sleeve 13 due to magnetism. This toner is for sleeve 1
After its thickness is adjusted by a blade 14 that is pressed so as to lightly touch the outer circumferential surface of the photoreceptor 3, it is sent to the side of the photoreceptor 1 facing the electrostatic latent image.
「発明が解決しようとする問題点」
さて、このような現像装置の使用中、第５図に示すよう
に、スリーブ１３の外周に突然、一部分トナーが付着し
ない線状部分１６が発生し、現像不良によるコピーの失
敗が生じることがある。``Problems to be Solved by the Invention'' During the use of such a developing device, as shown in FIG. Copying failures may occur due to defects.
この原因を調査したところ第６図に示すように、ブレー
ド１４とスリーブ１３との微小間隙にトナーの塊やトナ
ー中に混入したシール材その他の塵埃１７が詰まり、そ
の部分のトナー１８がスＩＪ −ブ外周からかき落とさ
れてしまうことがわかった。When we investigated the cause of this problem, we found that the small gap between the blade 14 and the sleeve 13 was clogged with toner lumps, sealing material, and other dust 17 mixed into the toner, and the toner 18 in that area was blocked by the IJJ. - It was found that the material was scraped off from the outer periphery.
このような塵埃等をトナー中から完全に除去することは
、非常に難しく、また、いったんこれらによる詰まりが
生じると、現像器の分解修理等が必要になり、回復に非
常な手数を必要とする難点があった。It is extremely difficult to completely remove such dust from toner, and once clogging occurs, the developing device must be disassembled and repaired, which requires a great deal of effort to recover. There was a problem.
本発明は以上の点に着目してなされたもので、上記のよ
うな詰まりによるトラブルを防止し、またトラブルが発
生しても速やかに回復する現像装置を提供することを目
的とするものである。The present invention has been made in view of the above points, and it is an object of the present invention to provide a developing device that prevents troubles due to clogging as described above, and that can quickly recover from troubles that occur. .
「問題点を解決するための手段」
本発明の現像装置は、現像剤を外周面に一様に付着させ
てこれを担持する現像剤担持体を、外表面に静電潜像が
形成された静電潜像保持部材に対向させて配置し上記静
電潜像を現像するものにおいて、上記現像剤担持体はほ
ぼ円筒状とされ、その外周上に、その回転軸に平行に向
けて配置され上記現像剤の現像剤担持体外周面への付着
厚さを調整するブレードが設けられており、上記現像剤
担持体は、上記現像処理中には、所定速度で正転し、現
像処理がされていないとき所定時間逆転するよう駆動制
御されることを特徴とするものである。"Means for Solving the Problems" The developing device of the present invention has a developer carrier that uniformly adheres and carries developer on its outer circumferential surface, and a developer carrier that carries the developer uniformly on its outer circumferential surface. In the device that is disposed opposite to the electrostatic latent image holding member and develops the electrostatic latent image, the developer carrier has a substantially cylindrical shape, and is disposed on the outer periphery of the developer carrier parallel to its rotation axis. A blade is provided to adjust the adhesion thickness of the developer to the outer circumferential surface of the developer carrier, and the developer carrier rotates forward at a predetermined speed during the development process. It is characterized in that the drive is controlled so that the rotation is reversed for a predetermined period of time when the rotation is not performed.
「作用」
以上のように、本発明の現像装置は、感光体く静電潜像
保持部材〉の現像中は、スリーブ（現像剤担持体）を正
常に正転させ、その現像処理の終了後、適当なタイミン
グで一時的にそのスリーブを逆転させる。これによって
、スリーブとブレードと間に詰まった塵埃等が除去され
、また、少量の塵埃であって、完全に詰まって現′像に
支障が生じる以前のものがそのつど除去される。"Function" As described above, the developing device of the present invention normally rotates the sleeve (developer carrier) in the normal direction during development of the photoreceptor (electrostatic latent image holding member), and after the development process is completed. , temporarily reverse the sleeve at an appropriate timing. As a result, dust and the like that are stuck between the sleeve and the blade are removed, and small amounts of dust that are not completely clogged and cause problems in development are also removed each time.
「実施例」
第１図は本発明の現像装置の実施例を示す断面図である
。Embodiment FIG. 1 is a sectional view showing an embodiment of the developing device of the present invention.
この現像装置には、トナーホッパー１１中でトナー（現
像剤）を攪拌するアジテータ１２と、トナーを外周面に
一様に付着させてこれを担持するスリーブ１３と、スリ
ーブ１３の回転軸に平行に向けて配置されてスリーブ外
周面へのトナーの付着厚さを調整するブレード１４とが
設けられている。This developing device includes an agitator 12 that stirs the toner (developer) in a toner hopper 11, a sleeve 13 that carries the toner by uniformly adhering it to the outer circumferential surface, and a sleeve 13 arranged parallel to the rotation axis of the sleeve 13. A blade 14 is provided to adjust the thickness of toner adhesion to the outer peripheral surface of the sleeve.
アジテーク１２は、矢印２１方向に回転して、トナーを
攪拌しながらスリーブ１３方向へ送る既知の構成の装置
である。ブレード１４はシリコンゴム等からなり、トナ
ーホッパー１１の内壁に設けられた凸起２２に支持され
、スリーブ１３の外周面に軽く接触するよう配置されて
いる。その形状は第５図に示したとおりのものである。The agitator 12 is a device with a known configuration that rotates in the direction of the arrow 21 and sends the toner toward the sleeve 13 while agitating the toner. The blade 14 is made of silicone rubber or the like, is supported by a protrusion 22 provided on the inner wall of the toner hopper 11, and is arranged so as to lightly contact the outer peripheral surface of the sleeve 13. Its shape is as shown in FIG.
スＩＪ−ブ１３は、駆動制御部２５により通常矢印２３
方向に回転するよう制御されている。この駆動制御部２
５はモータおよびその制御回路から構成され、感光体１
の回転と同期してこのスリーブ１３を回転させる一方、
現像処理の直後あるいは直前で、次のようにスリーブを
回転させる。The IJ-bu 13 is normally moved by the arrow 23 by the drive control unit 25.
It is controlled to rotate in the direction. This drive control section 2
5 is composed of a motor and its control circuit;
While rotating this sleeve 13 in synchronization with the rotation of
Immediately after or just before the development process, rotate the sleeve as follows.
第２図と第３図は、そのスリーブの回転速度を縦軸に、
時間を横軸に示したグラフである。Figures 2 and 3 show the rotational speed of the sleeve on the vertical axis.
It is a graph showing time on the horizontal axis.
第２図において、スリーブ１３は、現像処理中一定速度
で正転するが、現像終了直後、Ｔ時間逆転する。このと
き、逆転によってスリーブ１３は、第６図に長さＷで示
した距離だけ後もどりするように、逆転速度と時間を選
定しておく。この長さＷは、ブレード１４とスリーブ１
３とが接する個所から、ブレード１４の下端までの距離
である。In FIG. 2, the sleeve 13 rotates in the normal direction at a constant speed during the development process, but immediately after the completion of the development process, the sleeve 13 rotates in the reverse direction for a time T. At this time, the reversal speed and time are selected so that the sleeve 13 returns by the distance shown by the length W in FIG. 6 due to the reversal. This length W is the length between the blade 14 and the sleeve 1.
This is the distance from the point where 3 and 3 touch to the lower end of the blade 14.
現像直後にスリーブ１３をこれだけの１あるい；まそれ
以上逆転させてやると、このブレード１４とスリーブ１
３との間に、詰まったかあるいは詰まりそうになった塵
埃１７（第６図）が、図の下方に落下する。これによっ
て、詰まりの防止あるいは除去が自動的に行われる。Immediately after development, if the sleeve 13 is reversed this many times or more, this blade 14 and sleeve 1
Dust 17 (FIG. 6) that is clogged or about to clog between 3 and 3 falls to the lower part of the figure. This automatically prevents or eliminates blockages.
第３図は、この駆動制御部２５の別の動作例を示し、こ
れは、現像処理の直前にスリーブを１時間逆転させると
いうもので、その他の動作および効果は第２図の場合と
同様である。FIG. 3 shows another example of the operation of the drive control section 25, in which the sleeve is reversed for one hour immediately before the development process, and the other operations and effects are the same as in the case of FIG. 2. be.
「変形例」 本発明は以上の実施例に限定されない。"Variation" The present invention is not limited to the above embodiments.
現像剤を同様の原理によって現像剤担持体外周に付着さ
せ、静電潜像の現像を行うあらゆる装置について、本発
明を適用することができる。また、現像剤担持体の逆転
のタイミングは、現像処理が行われていないときであれ
ばいつでもよく、現像処理の終了のつど１回ずつでも、
また数回の現像処理後１回でもよく、あるいは複数回繰
り返してもよい。The present invention can be applied to any device that develops an electrostatic latent image by attaching developer to the outer periphery of a developer carrier using the same principle. Further, the timing for reversing the developer carrier may be any time when the development process is not being performed, or it may be performed once each time the development process is completed.
Moreover, it may be carried out once after several times of development processing, or may be repeated several times.
また、この現像装置は複写機に限らずレーザプリンタ等
を用いた記録装置に採用してもさしつかえない。Further, this developing device is not limited to a copying machine, but may be used in a recording device using a laser printer or the like.
「発明の効果」
以上説明した本発明の現像装置によれば、現像剤担持体
の外周面に現像剤を常に一様に付着させることができ、
万一トラブルが生じてもこれを自動的に除去することが
できる。"Effects of the Invention" According to the developing device of the present invention explained above, the developer can always be uniformly attached to the outer peripheral surface of the developer carrier,
Even if a problem should occur, it can be automatically removed.
第１図は本発明の現像装置の実施例を示す装置の断面図
、第２図と第３図（まその現像剤担持体の駆動制御の説
明図、第４図は本発明の実施に適する複写装置の概略構
成図、第５図はその現像剤担持体とブレードとの関係を
示す斜視図、第６図は詰まりの生じた部分の部分拡大縦
断面図である。
１・・・・・・静電潜像保持部材、
１３・・・・・・現像剤担持体、
１４・・・・・・ブレード、
２５・・・・・・駆動制御部。
出 願 人
富士ゼロックス株式会社
代 理 人
弁理士 山 内 梅 雄
第４図
第５園 第６図FIG. 1 is a cross-sectional view of the developing device showing an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of the drive control of the developer carrier, and FIG. FIG. 5 is a perspective view showing the relationship between the developer carrier and the blade, and FIG. 6 is a partially enlarged vertical cross-sectional view of the clogged portion. 1. - Electrostatic latent image holding member, 13... Developer carrier, 14... Blade, 25... Drive control section. Applicant: Fuji Xerox Co., Ltd. Agent Patent Attorney Umeo Yamauchi Figure 4 Figure 5 Garden Figure 6
Claims (1)
剤担持体を、外表面に静電潜像が形成された静電潜像保
持部材に対向させて配置し前記静電潜像を現像するもの
において、前記現像剤担持体はほぼ円筒状とされ、その
外周上に、その回転軸に平行に向けて配置され前記現像
剤の現像剤担持体外周面への付着厚さを調整するブレー
ドが設けられており、前記現像剤担持体は、前記現像処
理中には、所定速度で正転し、現像処理がされていない
とき所定時間逆転するよう駆動制御されることを特徴と
する現像装置。A developer carrying member that uniformly adheres and carries a developer on its outer peripheral surface is disposed facing an electrostatic latent image holding member having an electrostatic latent image formed on its outer surface. The developer carrier is approximately cylindrical, and is arranged on its outer periphery parallel to its rotation axis to adjust the thickness of the developer attached to the outer circumferential surface of the developer carrier. The developer carrier is drive-controlled so that it rotates forward at a predetermined speed during the development process, and rotates in the reverse direction for a predetermined time when the development process is not being performed. Developing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61262680A JPS63118170A (en) | 1986-11-06 | 1986-11-06 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61262680A JPS63118170A (en) | 1986-11-06 | 1986-11-06 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63118170A true JPS63118170A (en) | 1988-05-23 |
Family
ID=17379096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61262680A Pending JPS63118170A (en) | 1986-11-06 | 1986-11-06 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63118170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03255482A (en) * | 1990-03-06 | 1991-11-14 | Oki Electric Ind Co Ltd | Image forming device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61243473A (en) * | 1985-04-19 | 1986-10-29 | Sanyo Electric Co Ltd | One component developing device |
-
1986
- 1986-11-06 JP JP61262680A patent/JPS63118170A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61243473A (en) * | 1985-04-19 | 1986-10-29 | Sanyo Electric Co Ltd | One component developing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03255482A (en) * | 1990-03-06 | 1991-11-14 | Oki Electric Ind Co Ltd | Image forming device |
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