JPS60222875A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS60222875A JPS60222875A JP59079396A JP7939684A JPS60222875A JP S60222875 A JPS60222875 A JP S60222875A JP 59079396 A JP59079396 A JP 59079396A JP 7939684 A JP7939684 A JP 7939684A JP S60222875 A JPS60222875 A JP S60222875A
- Authority
- JP
- Japan
- Prior art keywords
- developing device
- developer
- developing
- diameter
- developers
- 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
- G03G15/0896—Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はたとえば複写機などに備えられた多色現像を行
なう現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a developing device for performing multicolor development, which is provided in, for example, a copying machine.
この種の現像装置としては従来、たとえば第1図に示す
ようなものが知られている。すなわ歓M由1は箇互鳩の
太伏内f同1自在に話げられた感光ドラムで、この感光
ドラム1の隣側にその回転方向に沿って第1および第2
の現像器2,3が配設されている。ところで、通常、前
記第1の現像器2内には消費量の少ないたとえば赤色、
青色、黄色などの現像剤4が収容され、第2の現像器3
内には消費量の多いたとえば黒色の現像剤5が収容され
ている。また、上記第1および第2の現像器2,3内に
はそれぞれ現像剤供給用のマグネットローラ6.7が配
設されている。As this type of developing device, one shown in FIG. 1, for example, is conventionally known. In other words, the photosensitive drum 1 is a photosensitive drum that can be freely rotated in a circular pattern, and adjacent to the photosensitive drum 1 there are a first and a second photosensitive drum along the direction of rotation.
Developing units 2 and 3 are provided. By the way, normally, in the first developing device 2, for example, red color, which has a low consumption amount,
A second developing device 3 contains developer 4 of blue, yellow, etc.
For example, a black developer 5, which is consumed in a large amount, is stored therein. Further, magnetic rollers 6.7 for supplying developer are provided in the first and second developing devices 2 and 3, respectively.
しかして、現像時には第1あるいは第2の現像器2,3
内のマグネットローラ6.7が回転されて感光ドラム1
上に形成された静電潜像に現像剤4,5が供給され多色
の現像が行なわれるようになっている。Therefore, during development, the first or second developing device 2, 3
The magnet rollers 6 and 7 inside are rotated and the photosensitive drum 1
Developers 4 and 5 are supplied to the electrostatic latent image formed thereon to perform multicolor development.
しかしながら、従来においては、現像剤4゜5の消費量
に関係なく、第1および第2の現f象器2,3のマグネ
ットローラ6.7を同一の径にしていたため、大形化し
てしまう不都合があった。、マた、マグネットローラ6
の径が大鍍いと、その分感光ドラムIの周長が長く必要
となり、感光ドラム1の径も太き(しなければならず、
さらに、使用頻度の少ない第1の現像器2と使用頻度の
多い第2の現像器3とではその現像剤4,5の寿命も太
き(変化してしまう不都合があった。However, in the past, the magnet rollers 6.7 of the first and second developing devices 2, 3 were made to have the same diameter regardless of the consumption amount of developer 4.5, which resulted in an increase in size. There was an inconvenience. , Ma, Magnet roller 6
If the diameter of the photosensitive drum I is large, the circumference of the photosensitive drum I must be increased accordingly, and the diameter of the photosensitive drum 1 must also be large.
Furthermore, the lifespans of the developers 4 and 5 in the first developing device 2, which is used less frequently, and the second developing device 3, which is used more frequently, are long (and vary).
本発明は上記事情に着目してなされたもので、その目的
とするところは、小型、軽量化を図ることができるとと
もに複数の現像剤の寿命も均一化できるようにした現像
装置を提供しようとするものである。The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a developing device that can be made smaller and lighter, and can also equalize the lifespan of a plurality of developers. It is something to do.
本発明は上記目的を達成するため、複数の現像器の使用
頻度に応じてその現像剤供給用の回転体の径を異ならせ
たものである。In order to achieve the above object, the present invention is such that the diameter of a rotating body for supplying developer is varied depending on the frequency of use of a plurality of developing devices.
以下、本発明を第2図に示す一実施例を参照して説明す
る。図中11は複写機の本体で、この本体11内の中央
部には感光ドラム12が回転可能に設けられている。こ
の感光ドラム12の周囲部にはその回転方向に沿って順
次、帯電器13、第1の現像器14第2の現像器15、
転写、剥離チャージャ16.17およびクリーニング装
置18が配設されている。また、上記本体11の一側下
部には給紙カセット19が設けられ、この給紙カセット
19から給紙ローラ20の回転によシ用紙Pが一枚ずつ
取出され、レジストローラ21へ送られるようになって
いる。また、22は排紙路で、との排紙路22には用紙
Pの排紙方向に沿って順次、搬送ベルト23定着器24
および排紙ローラ25が配設されている。また、前記排
紙ローラ25の排出側には排紙トレイ26が設けられて
いる。The present invention will be described below with reference to an embodiment shown in FIG. In the figure, reference numeral 11 denotes a main body of the copying machine, and a photosensitive drum 12 is rotatably provided in the center of the main body 11. A charger 13, a first developer 14, a second developer 15, a charger 13, a first developer 14, a second developer 15,
A transfer and peel charger 16, 17 and a cleaning device 18 are provided. Further, a paper feed cassette 19 is provided at the lower part of one side of the main body 11, and sheets P are taken out one by one from this paper feed cassette 19 by the rotation of a paper feed roller 20 and sent to a registration roller 21. It has become. 22 is a paper ejection path, and the paper ejection path 22 includes a conveyor belt 23, a fuser 24,
and a paper discharge roller 25 are provided. Further, a paper ejection tray 26 is provided on the ejection side of the paper ejection roller 25.
また、上記装置本体11内の上部側には、光源27、複
数の反射ミラー28・・・およびレンズ29などからな
る露光系30が設けられている。Further, an exposure system 30 including a light source 27, a plurality of reflecting mirrors 28, a lens 29, etc. is provided on the upper side of the apparatus main body 11.
さらに、上記装置本体1ノの上面部には原稿を載置する
原稿載置台3Iが設けられている。Further, on the upper surface of the apparatus main body 1, there is provided a document placing table 3I on which a document is placed.
一方、上記第1の現像器14はその容器41内に消費量
の少ないたとえば青、赤、黄色の現像剤42を収容する
とともにこの現像剤42を供給する回転体としての第1
のマグネットローラ43を備えている。また、上記第2
の現1象器15はその容器44内に消費量の多い黒色の
現像剤45を収容するとともに回転体としての第2のマ
グネットローラ46を備えている。上記第1の現像器1
4の第1のマグネットローラ43は上記第2の現像器1
5の第2のマグネットローラ46の径よシも小とされ、
第1の現像器14は第2の現像器15よシも小形化され
ている。すなわち、第1の現像器14は少量複写、第2
の現像器15は多量複写に適するように構成されている
。On the other hand, the first developing device 14 stores in its container 41 a developer 42 of, for example, blue, red, or yellow, which has a small consumption amount, and also has a first developing device as a rotating body that supplies the developer 42.
It is equipped with a magnet roller 43. In addition, the second
The imager 15 stores a black developer 45, which is consumed in a large amount, in a container 44, and is equipped with a second magnet roller 46 as a rotating body. The first developing device 1
The first magnetic roller 43 of No. 4 is connected to the second developing device 1.
The diameter of the second magnet roller 46 of No. 5 is also small,
The first developing device 14 is also smaller in size than the second developing device 15. That is, the first developing device 14 is used for small amount copying, and the second developing device
The developing device 15 is constructed to be suitable for mass copying.
また、上記第1および第2の現像器14.16はそれぞ
れ独立的に駆動されるようになっておシ、操作盤上の選
択ボタン(図示しない)によシ複写時にそれぞれ選択さ
れて使用できるようになっている。The first and second developing units 14 and 16 are each driven independently, and can be selected and used when copying using selection buttons (not shown) on the operation panel. It looks like this.
しかして、複写時には感光体ドラム12の表面が帯電器
13により一様に帯電され、この帯電された表面に露光
系3oにより原稿に対応した静電潜像が形成される。そ
して、この静電潜像は第1の現像器14あるいは第2の
現像器15からそのマグネットローラ43あるいは46
の回転によシ現像剤42あるいは45が供給されること
によシ顕像化され、転写チャージャ16において給紙カ
セット19から供給された用紙Pに転写されることにな
る。この画像が転写された用紙Pは剥離チャージャ17
により感光ドラム12から剥離され、定着器24へ送ら
れ、ここで定着されたのち排紙ローラ25を介して排紙
トレイ26に排出されることになる。During copying, the surface of the photosensitive drum 12 is uniformly charged by the charger 13, and an electrostatic latent image corresponding to the original is formed on this charged surface by the exposure system 3o. Then, this electrostatic latent image is transferred from the first developing device 14 or the second developing device 15 to the magnetic roller 43 or 46.
As the developer 42 or 45 is supplied by the rotation of the developer 42 or 45, the image is visualized and transferred to the paper P supplied from the paper feed cassette 19 in the transfer charger 16. The paper P to which this image has been transferred is placed in a peeling charger 17.
The toner is peeled off from the photosensitive drum 12 and sent to the fixing device 24, where it is fixed and then ejected to a paper ejection tray 26 via a paper ejection roller 25.
上述したように、使用頻度の少ない第1の現像器14の
マグネットローラ43の径を使用頻度の多い第2の現像
器15のマグネットローラ46の径よシ小さくしたから
、高速、多量複写性能を損うことなく装置の小形化を図
ることができるとともに第1および第2の現像器14゜
15の現像剤42.45の寿命も均一化できる。As mentioned above, since the diameter of the magnet roller 43 of the first developing device 14, which is used less frequently, is made smaller than the diameter of the magnet roller 46 of the second developing device 15, which is used more frequently, high-speed, high-volume copying performance can be achieved. The device can be downsized without damage, and the life of the developer 42, 45 in the first and second developing units 14 and 15 can be made uniform.
なお、上記−実施例においては現像器を2個備えた例で
説明したが、これに限られることなく、さらに多くの数
の現像器を説けるものであってもよい。In the above-mentioned embodiment, an example is described in which two developing devices are provided, but the present invention is not limited to this, and a larger number of developing devices may be provided.
本発明はさらにその要旨の範囲内で種々変形実施可能な
ことは勿論である。It goes without saying that the present invention can be further modified in various ways within the scope of its gist.
本発明は以上説明したように複数の現像器の使用頻度に
応じてその回転体の径を異ならせたから、高速多量複写
性能を損うことなく小形。As explained above, the present invention changes the diameter of the rotary body depending on the frequency of use of the plurality of developing units, so it is compact without impairing high-speed, large-volume copying performance.
軽量化できるとともに安価であシ、また、複数の現U剤
の寿命も均一化できるという効果を奏する。It is possible to reduce the weight and cost, and also has the effect of making the lifespan of the plurality of U agents uniform.
第1図は従来例を示す構成図、第2図は本発明の一実症
例である複写機を示す概略的構成図である。
14・・・第1の現像器(現像器)、15・・・第2の
現像器(現1象器)、43・・・第1のマグネットロー
ラ(回転体)、46・・・第2のマグネットローラ(回
転体)、42,45・・・現像剤。FIG. 1 is a block diagram showing a conventional example, and FIG. 2 is a schematic block diagram showing a copying machine which is an example of the present invention. 14... First developing device (developing device), 15... Second developing device (developing device), 43... First magnet roller (rotating body), 46... Second developing device magnetic roller (rotating body), 42, 45...developer.
Claims (2)
回転体によシ、現像剤を搬送し被現像面に供給するもの
において、前記複数の現像器の使用頻度に応じてその回
転体の径を異ならせたことを特徴とする現像装置。(1) In a device that is equipped with a plurality of developing devices, and a rotating body disposed in these developing devices conveys developer and supplies it to the surface to be developed, the amount of developer is adjusted according to the frequency of use of the plurality of developing devices. A developing device characterized by having rotating bodies having different diameters.
する特許請求の範囲第1項記載の現像装置0(2) The developing device 0 according to claim 1, wherein the rotating body is a magnetic roller.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59079396A JPS60222875A (en) | 1984-04-20 | 1984-04-20 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59079396A JPS60222875A (en) | 1984-04-20 | 1984-04-20 | Developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60222875A true JPS60222875A (en) | 1985-11-07 |
Family
ID=13688693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59079396A Pending JPS60222875A (en) | 1984-04-20 | 1984-04-20 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60222875A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61109074A (en) * | 1984-11-01 | 1986-05-27 | Canon Inc | Polychromatic developing device |
JPS6385657A (en) * | 1986-09-30 | 1988-04-16 | Toshiba Corp | Recorder |
US4814821A (en) * | 1986-07-15 | 1989-03-21 | Ricoh Company, Ltd. | Image-forming device |
CN100456158C (en) * | 2004-10-29 | 2009-01-28 | 京瓷美达株式会社 | Color image developing device |
-
1984
- 1984-04-20 JP JP59079396A patent/JPS60222875A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61109074A (en) * | 1984-11-01 | 1986-05-27 | Canon Inc | Polychromatic developing device |
US4814821A (en) * | 1986-07-15 | 1989-03-21 | Ricoh Company, Ltd. | Image-forming device |
US4901113A (en) * | 1986-07-15 | 1990-02-13 | Ricoh Company, Ltd. | Image-forming device |
JPS6385657A (en) * | 1986-09-30 | 1988-04-16 | Toshiba Corp | Recorder |
CN100456158C (en) * | 2004-10-29 | 2009-01-28 | 京瓷美达株式会社 | Color image developing device |
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