JPH067287B2 - Electrophotographic copying machine - Google Patents
Electrophotographic copying machineInfo
- Publication number
- JPH067287B2 JPH067287B2 JP59107807A JP10780784A JPH067287B2 JP H067287 B2 JPH067287 B2 JP H067287B2 JP 59107807 A JP59107807 A JP 59107807A JP 10780784 A JP10780784 A JP 10780784A JP H067287 B2 JPH067287 B2 JP H067287B2
- Authority
- JP
- Japan
- Prior art keywords
- rotating body
- toner
- photosensitive drum
- magnetized
- rotating
- 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.)
- Expired - Lifetime
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
- G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
- G03G15/757—Drive mechanisms for photosensitive medium, e.g. gears
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/10—Collecting or recycling waste developer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Sustainable Development (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、磁性トナーを用いた電子写真複写装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic copying machine using a magnetic toner.
従来例の構成とその問題点 従来、感光ドラムに残留したトナーをクリーニング装置
で掻落し、回収されたトナーを再度現像装置に送り、再
使用することが行われている。その手段として例えば、
感光体ドラムと同軸で，かつ軸方向に平行に着磁された
回転体と、現像手段に同軸で、かつ軸方向に平行に着磁
された回転体とを各々対向させて配設し、クリーニング
手段で回収した磁性トナーを２つの回転体を用いて現像
部もしくはトナーホッパーに移送する方式が提案されて
いる。2. Description of the Related Art Conventionally, the toner remaining on the photosensitive drum is scraped off by a cleaning device, and the collected toner is sent again to the developing device for reuse. As the means, for example,
A rotating body which is coaxial with the photosensitive drum and is magnetized parallel to the axial direction, and a rotating body which is magnetized coaxially with the developing means and which is magnetized parallel to the axial direction are arranged to face each other and are cleaned. A method has been proposed in which the magnetic toner collected by the means is transferred to a developing unit or a toner hopper using two rotating bodies.
電子写真の画像を鮮明に出すには、感光体ドラムが一定
速度で回転する必要があるが，感光体ドラムが回転中に
速度変動を生じると細かな文字がつぶれたり，一定濃度
の画像をコピーすると濃淡画像が生じるといった画質上
の問題が生じる。The photoconductor drum must rotate at a constant speed in order to produce a clear electrophotographic image. However, if the speed changes during rotation of the photoconductor drum, small characters are crushed or an image with a constant density is copied. Then, a problem in image quality occurs such that a grayscale image is generated.
前述した従来方式では、対向配設された回転体が軸方向
に平行な多極着磁で構成されており、回転時に相互の磁
極間で吸引と反発現象が生じ、感光体ドラム軸に+13dB
(V)の回転変動要因の周波数成分が発生し、この結果、
感光体ドラムの回転変動が起り細かな文字がつぶれた
り，不鮮明になる等の画質の低下をきたすと云った問題
点を有していた。In the above-mentioned conventional method, the rotors arranged to face each other are configured by multi-pole magnetization parallel to the axial direction, and during rotation, attraction and repulsion phenomena occur between the magnetic poles, and +13 dB is applied to the photosensitive drum shaft.
The frequency component of the rotation fluctuation factor of (V) is generated, and as a result,
There is a problem in that the rotation of the photosensitive drum causes fluctuations in the quality of the image, such as fine characters being crushed and unclear.
発明の目的 本発明は、前記従来例の欠点を除去せんとするものであ
り、感光体ドラムを定速回転させて高画質な複写が行な
える電子写真複写装置を提供しようとするものである。An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional example, and to provide an electrophotographic copying apparatus capable of performing high-quality copying by rotating the photosensitive drum at a constant speed.
発明の構成 本発明は、上記目的を達成するために、感光体ドラム
と、この感光体ドラムと同軸的かつ共に回転する着磁さ
れた第１の回転体と、前記感光体ドラム上に形成される
潜像を磁性トナーで現像する現像手段と、この現像手段
にその着磁面が前記第１の回転体の着磁面と対向するよ
うに配設された第２の回転体と、前記感光体ドラムに付
着した転写後の残留トナーを除去し前記第１の回転体へ
搬送するトナー搬送手段を配設したクリーニング手段と
を具備し、かつ前記第１の回転体と第２の回転の少なく
とも一方を斜めに着磁された回転体としたものである。According to the present invention, in order to achieve the above object, a photosensitive drum, a magnetized first rotating body that is coaxial with the photosensitive drum, and rotates together with the photosensitive drum are formed on the photosensitive drum. Developing means for developing the latent image with a magnetic toner, a second rotating body disposed on the developing means such that its magnetized surface faces the magnetized surface of the first rotating body, and the photosensitive member. Cleaning means provided with a toner conveying means for removing the residual toner after transfer adhering to the body drum and conveying to the first rotating body, and at least the first rotating body and the second rotating body. One is a rotating body that is obliquely magnetized.
実施例の説明 以下、本発明の実施例について図面と共に説明する。Description of Embodiments Embodiments of the present invention will be described below with reference to the drawings.
第１図は電子写真複写装置における複写工程を示す概略
図である。同図において、回転する感光体ドラム１の周
辺に帯電器２があり、ここにおいて感光体ドラム１の表
面上に帯電が行なわれ、次に光学手段（図示せず）によ
り潜像が形成される。さらに潜像は現像装置３により顕
像化され、感光体ドラム１上にトナー粉体像を形成す
る。その粉体像は、給紙手段４により供給され矢印方向
に進む転写用紙５に、帯電手段６により転写され、搬送
手段７により加熱・加圧式の定着装置へ送られる。転写
終了後、感光体ドラム１の表面上に残留するトナーはブ
レード式のクリーニング装置８において、クリーニング
ブレード９により掻き落されてクリーニング装置８の下
部に集められる。ここにはトナー搬送手段１０があり、
第１図において手前方向にトナーが搬送される。FIG. 1 is a schematic diagram showing a copying process in an electrophotographic copying apparatus. In the figure, there is a charger 2 around the rotating photosensitive drum 1, where the surface of the photosensitive drum 1 is charged, and then a latent image is formed by optical means (not shown). . Further, the latent image is visualized by the developing device 3, and a toner powder image is formed on the photosensitive drum 1. The powder image is transferred by the charging means 6 onto the transfer paper 5 supplied by the paper feeding means 4 and moving in the direction of the arrow, and is sent to the heating / pressurizing type fixing device by the conveying means 7. After the transfer is completed, the toner remaining on the surface of the photosensitive drum 1 is scraped off by the cleaning blade 9 in the blade type cleaning device 8 and collected under the cleaning device 8. There is a toner conveying means 10 here,
In FIG. 1, the toner is conveyed in the front direction.
次に、第２図，第３図，および第４図を参照して，クリ
ーニング装置８の一端に集めた回収トナーを現像装置３
を搬送する手段について説明する。外周部にゴム磁石１
１を連続的に配した回転体１２のゴム磁石の表面には回
転軸方向に対し，45゜傾けて多極の磁極が着磁してあ
る。磁力は表面で４００ガウスである。回転体１２は軸
受１３および図示しない別の軸受により回転自在に軸支
される駆動軸１４に感光体ドラム１と並列的に配され、
同一駆動源により回転する。さらに、現像装置３に回転
体１２と，その周囲を近接して回転するように円筒状磁
石１５が配してある。本実施例では円筒状磁石１５の表
面の着磁は回転軸方向と平行に多極着磁であるが、前記
回転体１２のゴム磁石１１の着磁方向とは逆の方向に斜
めに多極着磁しても構わない。円筒状磁石１５の周面に
接してトナー掻き取り板１６が配してある。クリーニン
グ装置８で回収され、トナー搬送手段１０により集めら
れた回収トナー１７は磁性を有するためゴム磁石１１に
吸着され，その回転に伴ない搬送される。円筒状磁石１
５は５００〜６００ガウスに着磁してあり、その磁力に
よりゴム磁石１１の周面より円筒状磁石１５の周面に吸
着され、その回転に伴ない，トナー掻き取り板１６によ
り掻き取られ、トナーホッパーあるいは現像装置３へ回
収される。なお、１８はカバーである。Next, referring to FIG. 2, FIG. 3, and FIG. 4, the collected toner collected at one end of the cleaning device 8 is transferred to the developing device 3.
Means for transporting will be described. Rubber magnet 1 on the outer circumference
On the surface of the rubber magnet of the rotating body 12 in which 1s are continuously arranged, multi-pole magnetic poles are magnetized at an angle of 45 ° with respect to the rotation axis direction. The magnetic force is 400 gauss on the surface. The rotating body 12 is arranged in parallel with the photosensitive drum 1 on a drive shaft 14 rotatably supported by a bearing 13 and another bearing (not shown).
It rotates by the same drive source. Further, the developing device 3 is provided with a rotating body 12 and a cylindrical magnet 15 so as to rotate around the rotating body 12. In the present embodiment, the surface of the cylindrical magnet 15 is magnetized in multiple poles in parallel with the direction of the rotation axis, but in the opposite direction to the magnetizing direction of the rubber magnet 11 of the rotor 12, the magnets are inclined in multiple poles. You can magnetize it. A toner scraping plate 16 is arranged in contact with the peripheral surface of the cylindrical magnet 15. The collected toner 17 collected by the cleaning device 8 and collected by the toner conveying means 10 has magnetism and is adsorbed by the rubber magnet 11 and conveyed along with its rotation. Cylindrical magnet 1
No. 5 is magnetized to 500 to 600 Gauss, and the magnetic force of the magnet 5 causes it to be attracted to the peripheral surface of the cylindrical magnet 15 from the peripheral surface of the rubber magnet 11, and along with its rotation, is scraped off by the toner scraping plate 16. The toner is collected in the toner hopper or the developing device 3. Reference numeral 18 is a cover.
ここで、トナー搬送手段１０からゴム磁石１１への受け
渡しは磁力により行なわれるため、磁性を持たない紙粉
は、ゴム磁石１１上に移ることなく落下し、カバー１８
の下部にたまるため、現像装置３内に入ることはない。
また、ゴム磁石１１から円筒磁石１５へのトナーの授受
は、両磁石が回転しているため連続的に円滑に行なわ
れ、かつ常に磁力を受けて搬送されるために、他の受け
渡し手段，例えば掻き取り、あるいは自然落下において
起こるトナーの落下や飛散は起こらず、この部分の連続
的なシールは必要としないので、円筒状磁石１５はなん
らの操作をすることなく容易に分離できる。Here, since the transfer from the toner conveying means 10 to the rubber magnet 11 is performed by magnetic force, the non-magnetic paper powder drops without moving onto the rubber magnet 11 and the cover 18
Since it accumulates at the bottom of the developing device 3, it does not enter the developing device 3.
The transfer of toner from the rubber magnet 11 to the cylindrical magnet 15 is smoothly performed continuously because both magnets are rotating, and the magnetic force is always applied to the toner to convey the toner. Since the toner does not drop or scatter due to scraping or natural falling, and continuous sealing of this portion is not required, the cylindrical magnet 15 can be easily separated without any operation.
本発明の実施例によれば、回転体１２の着磁方向を斜め
にしているため磁極間の吸引，反発現象により生じる回
転変動要因の周波数成分を-19dB(V)にまで低下させるこ
とができた。従って感光体ドラムは定速回転し、高品質
の画像複写が可能となった。このことは一方の円筒状磁
石１５を斜めに着磁しても同様の効果が得られる。According to the embodiment of the present invention, since the magnetization direction of the rotating body 12 is inclined, the frequency component of the rotation fluctuation factor caused by the attraction between the magnetic poles and the repulsion phenomenon can be reduced to -19 dB (V). It was Therefore, the photosensitive drum rotates at a constant speed, and high-quality image copying becomes possible. The same effect can be obtained even if one of the cylindrical magnets 15 is magnetized obliquely.
発明の効果 以上詳述したごとく本発明は、磁性トナーの回収搬送に
供する回転体の一方を，その回転軸心に対して斜めに着
磁することにより、感光体ドラムの回転変動が低下し、
定速回転が可能となって高品質の画像複写を可能にし得
るものである。Effects of the Invention As described in detail above, according to the present invention, one of the rotating bodies used for collecting and conveying the magnetic toner is magnetized obliquely with respect to the rotation axis thereof, thereby reducing the rotational fluctuation of the photosensitive drum.
It is possible to rotate at a constant speed to enable high quality image copying.
また、トナーを固着させることなく円滑にクリーニング
装置より現像装置へ導くことができ、かつ、紙粉が現像
装置内へ混入して画質を低下させるようなこともない。
さらにトナーの受け渡し部が簡単に分離できるため現像
装置の着脱が容易となり、保守・点検等において極めて
有利となる。Further, it is possible to smoothly guide the toner to the developing device from the cleaning device without fixing the toner, and there is no possibility that the paper dust is mixed into the developing device to deteriorate the image quality.
Further, since the toner transfer portion can be easily separated, the developing device can be easily attached and detached, which is extremely advantageous in maintenance and inspection.
第１図は電子写真複写装置の概略構成図、第２図は本発
明の一実施例を示す要部縦断面図、第３図は同実施例の
要部横断面図、第４図は同実施例の要部斜視図である。 １……感光体ドラム、３……現像装置、８……クリーニ
ング装置、１０……トナー搬送手段、１１……ゴム磁
石、１４……駆動軸、１５……円筒状磁石、１６……ト
ナー掻き取り板。FIG. 1 is a schematic configuration diagram of an electrophotographic copying machine, FIG. 2 is a longitudinal sectional view of an essential part showing an embodiment of the present invention, FIG. 3 is a transverse sectional view of an essential part of the same embodiment, and FIG. It is a principal part perspective view of an Example. 1 ... Photosensitive drum, 3 ... Developing device, 8 ... Cleaning device, 10 ... Toner conveying means, 11 ... Rubber magnet, 14 ... Drive shaft, 15 ... Cylindrical magnet, 16 ... Toner scraping Plate.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−21175（ＪＰ，Ａ) 特開 昭50−3636（ＪＰ，Ａ) 特開 昭57−62078（ＪＰ，Ａ) 特開 昭57−93374（ＪＰ，Ａ) 実開 昭58−100359（ＪＰ，Ｕ) 実開 昭59−58460（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-21175 (JP, A) JP-A-50-3636 (JP, A) JP-A-57-62078 (JP, A) JP-A-57- 93374 (JP, A) Actual Open Sho 58-100359 (JP, U) Actual Open Sho 59-58460 (JP, U)
Claims (1)
の極性が回転方向に対して交互に配列して着磁され、前
記感光体ドラムと同軸的かつ共に回転する第１の回転体
と、前記感光体ドラム上に形成される潜像を磁性トナー
で現像する現像手段と、円筒状で円筒表面に磁極の極性
が回転方向に対して交互に配列され、かつ前記第１の回
転体より強く着磁され、その着磁面が前記第１の回転体
の着磁面と対向するように前記現像手段に回転可能に配
設された第２の回転体と、前記感光体ドラムに付着した
転写後の残留トナーを除去し前記第１の回転体へ搬送す
るトナー搬送手段を配設したクリーニング手段とを具備
し、前記第１の回転体と第２の回転体の少なくとも一方
が回転軸に対して斜めに着磁されたことを特徴とする電
子写真複写装置。1. A photosensitive drum and a first rotating body which is cylindrical and is magnetized by alternately arranging polarities of magnetic poles on a cylindrical surface in the rotating direction, and rotating coaxially with the photosensitive drum. A developing means for developing a latent image formed on the photosensitive drum with magnetic toner, and a cylindrical surface having magnetic pole polarities alternately arranged with respect to the rotation direction, and the first rotating body. Attached to the photosensitive drum and a second rotating body that is more strongly magnetized and is rotatably disposed in the developing means so that its magnetized surface faces the magnetized surface of the first rotating body. Cleaning means provided with a toner conveying means for removing the residual toner after the transfer and for conveying to the first rotating body, wherein at least one of the first rotating body and the second rotating body is a rotating shaft. An electrophotographic copying apparatus characterized in that it is magnetized obliquely with respect to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107807A JPH067287B2 (en) | 1984-05-28 | 1984-05-28 | Electrophotographic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107807A JPH067287B2 (en) | 1984-05-28 | 1984-05-28 | Electrophotographic copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60250377A JPS60250377A (en) | 1985-12-11 |
| JPH067287B2 true JPH067287B2 (en) | 1994-01-26 |
Family
ID=14468530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59107807A Expired - Lifetime JPH067287B2 (en) | 1984-05-28 | 1984-05-28 | Electrophotographic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067287B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8834354B2 (en) | 2000-04-03 | 2014-09-16 | Intuitive Surgical Operations, Inc. | Steerable endoscope and improved method of insertion |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4835582A (en) * | 1986-10-28 | 1989-05-30 | Ricoh Company, Ltd. | Device for driving a photoconductive element of an electrophotographic copier etc. |
| JP2713896B2 (en) * | 1987-01-19 | 1998-02-16 | キヤノン株式会社 | Multicolor image forming device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625672B2 (en) * | 1973-05-14 | 1981-06-13 | ||
| JPS5621175A (en) * | 1979-07-30 | 1981-02-27 | Konishiroku Photo Ind Co Ltd | Method and device for toner recovery in electrophotographic copier |
| JPS5762078A (en) * | 1980-10-02 | 1982-04-14 | Seiko Epson Corp | Magnetic brush developing device |
| JPS5793374A (en) * | 1980-12-02 | 1982-06-10 | Ricoh Co Ltd | Magnetic brush developing device |
| JPS57138667A (en) * | 1981-02-19 | 1982-08-27 | Matsushita Electric Ind Co Ltd | Electrostatic developing device |
| JPS58100359U (en) * | 1981-12-28 | 1983-07-08 | コニカ株式会社 | magnetic brush device |
| JPS5942568A (en) * | 1982-09-03 | 1984-03-09 | Hitachi Ltd | Developing device |
| JPS5958460U (en) * | 1982-10-13 | 1984-04-16 | 株式会社リコー | magnetic brush developing device |
-
1984
- 1984-05-28 JP JP59107807A patent/JPH067287B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8834354B2 (en) | 2000-04-03 | 2014-09-16 | Intuitive Surgical Operations, Inc. | Steerable endoscope and improved method of insertion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60250377A (en) | 1985-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |