JPH0237597B2 - KURIININGUSOCHI - Google Patents
KURIININGUSOCHIInfo
- Publication number
- JPH0237597B2 JPH0237597B2 JP9045481A JP9045481A JPH0237597B2 JP H0237597 B2 JPH0237597 B2 JP H0237597B2 JP 9045481 A JP9045481 A JP 9045481A JP 9045481 A JP9045481 A JP 9045481A JP H0237597 B2 JPH0237597 B2 JP H0237597B2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- image carrier
- abrasive
- cleaning
- magnetic
- 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
- 238000004140 cleaning Methods 0.000 claims description 28
- 230000005684 electric field Effects 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 2
- 108091008695 photoreceptors Proteins 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
Description
【発明の詳細な説明】
本発明は、クリーニング装置に係り、詳しくは
像担持体表面の付着物を常に良好に除去するクリ
ーニング装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device, and more particularly to a cleaning device that consistently removes deposits from the surface of an image carrier.
像担持体表面は、転写紙からの異物付着、空気
中の物質が放電を受けて生成される異物等により
汚染されるケースが多い。特に高湿下において吸
湿・水分吸着して表面抵抗が低下した場合には潜
像パターンは乱れ、得られた複写物も画像乱れと
なつて顕れる。又前述のごとく汚染された像担持
体表面は摩擦系数が高くなりブレードを使用する
クリーニングでは、特に担持体表面のトナー融着
等引き起す。 The surface of the image carrier is often contaminated by foreign matter adhering to the transfer paper, foreign matter generated when substances in the air are discharged, and the like. In particular, if the surface resistance decreases due to moisture absorption and adsorption under high humidity, the latent image pattern will be disturbed, and the resulting copy will also appear as image disturbance. Furthermore, as mentioned above, the surface of the image carrier that is contaminated has a high coefficient of friction, and cleaning using a blade particularly causes toner fusion on the surface of the carrier.
そこで、その対索として従来トナー中に酸化セ
リウム（CeO2）等の研摩粉を外添し、或は内添
して加え、現像に際し、現像剤と共に像担持体表
面へ研摩剤を付着させ、転写後クリーニング手段
例えば、ブレードの圧接部で像担持体表面を研摩
し、像担持体表面の汚染物を除去していた。 Therefore, as a countermeasure, abrasive powder such as cerium oxide (CeO 2 ) is added externally or internally to the conventional toner, and during development, the abrasive is attached to the surface of the image carrier together with the developer. Post-transfer cleaning means, such as a pressure contact portion of a blade, polishes the surface of the image carrier to remove contaminants on the surface of the image carrier.
しかるに、現像時に、像担持体表面に付着する
現像剤量は、潜像形成に用いるオリジナルにより
変化し、特に黒色部分の少ないオリジナルでは付
着現像量が少なく、必然的に供与現像剤の量も減
少した。 However, during development, the amount of developer that adheres to the surface of the image carrier varies depending on the original used to form the latent image, and in particular, for originals with few black areas, the amount of developer that adheres is small, and the amount of developer that is provided also necessarily decreases. did.
この為、クリーニング部に於ける研摩剤の補給
はオリジナルに応じて変化し、特に補給量が少な
い場合には、像担持体表面の汚染が著しく進行す
ることになつた。 For this reason, the replenishment of abrasive in the cleaning section varies depending on the original, and especially when the amount of replenishment is small, contamination of the surface of the image carrier progresses significantly.
本発明は、上述の点に鑑み成されたもので、常
に良好な研摩クリーニング効果を得るクリーニン
グ装置を提供するものである。 The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a cleaning device that always obtains a good abrasive cleaning effect.
即ち、本願発明は、研摩剤を混入した磁性現像
剤を像担持体から除去するクリーニング装置にお
いて、像担持体表面へ当接して上記現像剤を掻き
取るクリーニング手段と、このクリーニング手段
より像担持体移動方向上流側へ配置された磁界発
生手段と、この磁界発生手段に対して像担持体と
磁界発生手段との間隔よりも小さい厚さに上記現
像剤を形成する手段と、上記磁界発生手段と像担
持体との間に磁界発生手段の周囲に保持された現
像剤を像担持体表面に供給するような電界を形成
する手段と、を有することを特徴とする。 That is, the present invention provides a cleaning device for removing magnetic developer mixed with an abrasive from an image carrier, including a cleaning means for scraping off the developer by coming into contact with the surface of the image carrier, and a cleaning device for removing the magnetic developer mixed with an abrasive from the image carrier. a magnetic field generating means disposed on the upstream side in the moving direction; a means for forming the developer to a thickness smaller than the distance between the image carrier and the magnetic field generating means with respect to the magnetic field generating means; and the magnetic field generating means. It is characterized by comprising means for forming an electric field between the image carrier and the image carrier so as to supply the developer held around the magnetic field generating means to the surface of the image carrier.
以下、本発明の詳細を、具体例により図面を参
照しつつ説明する。 Hereinafter, details of the present invention will be explained using specific examples with reference to the drawings.
第１図は、本発明を適用する具体例画像形成装
置の側面図である。 FIG. 1 is a side view of a specific example image forming apparatus to which the present invention is applied.
図中１は感光体ドラムで本例においては、導電
層・光導電層・絶縁層からなるNP感光体による
プロセスを示す。２は前除電用コロナ放電器で、
一様露光L1と共に感光体に作用しメモリーを消
去する。次いで、感光体１の周沿に設けられた一
次コロナ放電器３により一様に帯電された後原稿
に対応する像露光照射L3を行なうと略同時に３
と逆極性の二次コロナ放電を４によつて行ない、
更に均一光照射をして静電潜像を形成する。 In the figure, numeral 1 denotes a photoreceptor drum, and in this example, a process using an NP photoreceptor consisting of a conductive layer, a photoconductive layer, and an insulating layer is shown. 2 is a corona discharger for pre-static elimination;
It acts on the photoreceptor along with uniform exposure L 1 and erases the memory. Next, after being uniformly charged by a primary corona discharger 3 provided along the circumference of the photoreceptor 1, image exposure irradiation L 3 corresponding to the original is performed, and almost simultaneously 3
A secondary corona discharge of opposite polarity is performed by 4,
Furthermore, uniform light irradiation is performed to form an electrostatic latent image.
ここまでの過程が潜像形成過程のＡブロツクで
ある。 The process up to this point is block A of the latent image forming process.
次にＢブロツクにおいて現像されるが、トナー
容器６と下部に設けられたマグネツトスリーブか
ら成る現像器５には磁性絶縁トナーが満たされ、
スリーブに薄膜状にコーテイングされる。スリー
ブには交流バイアスが印加され潜像の作る電界に
よつてスリーブ上のトナーは感光ドラムに飛翔し
現像する。 Next, the toner is developed in the B block, and a developing device 5 consisting of a toner container 6 and a magnetic sleeve provided at the bottom is filled with magnetic insulating toner.
The sleeve is coated in a thin film. An alternating current bias is applied to the sleeve, and due to the electric field created by the latent image, the toner on the sleeve flies to the photosensitive drum and is developed.
現像された顕画像はローラー１２によつて搬送
されガイド９に案内された転写紙を介して裏面か
らコロナ放電器８によつて与えられるコロナによ
り転写紙上に転写され、分離コロ１３等の作用に
よりドラム表面から分離搬送される。 The developed visible image is transferred from the back side of the transfer paper through the transfer paper guided by the guide 9 by the roller 12 by the corona given by the corona discharger 8, and is transferred by the action of the separation roller 13 etc. Separated from the drum surface and conveyed.
一方ドラム表面の転写残りトナーは現像トナー
量に略10〜30％ありこれら残留現像剤が、本発明
に基づくクリーニング装置Ｄによつてクリーニン
グされ繰り返し使用される。図中１４は、ドラム
表面にエツジで当接するクリーニングブレード、
１５はドラムに近接回転する捕集用マグネツトロ
ーラー、１６は回収トナー搬送用のスクリユーで
ある。 On the other hand, the residual toner remaining after transfer on the surface of the drum is about 10 to 30% of the amount of developed toner, and these residual developers are cleaned by the cleaning device D according to the present invention and used repeatedly. 14 in the figure is a cleaning blade that contacts the drum surface with an edge;
Reference numeral 15 is a collection magnet roller that rotates close to the drum, and reference numeral 16 is a screw for conveying the collected toner.
以下、本発明に基づくクリーニングにつき更に
詳述する。 Hereinafter, the cleaning based on the present invention will be explained in more detail.
本発明に基づく実施例クリーニング装置にて
は、クリーニング手段の当接位置よりドラム回転
方向上流側に配置された捕集用マグネツトローラ
ー１５をドラム表面と適当な間隙（例えば１mm）
を保つて配置し、かつローラを接地状態としてい
る。 In the cleaning device according to the embodiment of the present invention, the collection magnet roller 15, which is disposed upstream in the rotational direction of the drum from the contact position of the cleaning means, is separated from the drum surface by an appropriate gap (for example, 1 mm).
The rollers are placed in such a way as to keep the rollers in contact with the ground.
これにより、ブレード１４にて除去された現像
剤及び研摩剤は、単にクリーニング装置外へ飛散
しない様に捕獲されてドラム表面より離隔される
のではなく、捕集用マグネツトローラ表面に捕獲
後、マグネツトローラの回転により、再度ドラム
表面と対面し、積極的にドラム表面へ研摩剤を供
与する如くしたものである。 As a result, the developer and abrasive removed by the blade 14 are not simply captured and separated from the drum surface to prevent them from scattering outside the cleaning device, but after being captured on the surface of the collecting magnet roller. As the magnet roller rotates, it faces the drum surface again and actively supplies the abrasive to the drum surface.
即ち接地された捕集用マグネツトローラ表面に
対し、ドラム表面の潜像電位にて現像剤及び研摩
剤を吸着する電界が形成されマグネツトローラー
表面よりドラム表面へ研摩剤が転移するのであ
る。 That is, an electric field is formed on the surface of the grounded collecting magnet roller to attract the developer and abrasive at the potential of the latent image on the drum surface, and the abrasive is transferred from the magnet roller surface to the drum surface.
特に、転写コロナ放電器８等によりドラム表面
に現像剤吸着に十分な電界が補充されている場
合、上記転移が良好に行なわれる。 In particular, when the drum surface is supplemented with an electric field sufficient to attract the developer by the transfer corona discharger 8 or the like, the above-mentioned transfer is carried out well.
勿論、転写後、ドラム表面がクリーニング装置
位置へ到達する前の位置にて現像剤の転移を促進
する為にポスト帯電を施す様にしても良い。 Of course, after the transfer, post-charging may be performed at a position before the drum surface reaches the cleaning device position in order to promote the transfer of the developer.
一方マグネツトローラ表面に捕獲した現像剤を
全て再度ドラム表面に供給する様にしても良い
が、ドラム表面との接触時に飛散を生じる場合も
あるので、マグネツトローラ表面の現像剤層を規
制して、通常ドラム表面と非接触な厚さとし、前
記ドラム・ローラ間の電界作用にて現像剤を飛翔
させることは極めて有効である。因に、本実施例
にては、マグネツトローラ表面に0.5〜0.8mm程度
の現像剤ブラシ層を形成する様にして良好な結果
を得た。この現像層規制はクリーニング装置下部
の一部に設けたスクレーパー１７により成され
る。 On the other hand, all the developer captured on the magnet roller surface may be supplied to the drum surface again, but this may cause scattering when it comes into contact with the drum surface, so the developer layer on the magnet roller surface may be regulated. Therefore, it is extremely effective to make the developer so thick that it does not normally come into contact with the drum surface, and to make the developer fly by the action of the electric field between the drum and roller. In this example, good results were obtained by forming a developer brush layer of about 0.5 to 0.8 mm on the surface of the magnet roller. This development layer regulation is accomplished by a scraper 17 provided at a part of the lower part of the cleaning device.
又、マグネツトローラ１５には接地電位のみな
らず、所定極性の電位を印加してマグネツトロー
ラ１５上の現像剤がドラム表面へ飛翔し易くする
ことは有効である。（第３図参照）
又、マグネツトローラを直接露出して用いる外
マグネツトローラー１を非磁性体スリーブ内に収
容して利用することも有効である。第４図は、除
去現像剤の回収、及び再供給手段として非磁性ス
リーブ内に捕集用マグネツトローラを収容して利
用した場合の例で前述第２図示装置と共通部材は
同一番号で示している。ブレード１４の下方に配
置されたアルミ等の非磁性体スリーブ１８内に捕
集用マグネツトローラ１５′が配置され、スリー
ブ１８表面は、接地或は所望電位を印加出来る様
に構成される。 Furthermore, it is effective to apply not only a ground potential but also a potential of a predetermined polarity to the magnet roller 15 to make it easier for the developer on the magnet roller 15 to fly to the drum surface. (See FIG. 3) It is also effective to use the outer magnet roller 1 with the magnet roller directly exposed and housed in a non-magnetic sleeve. FIG. 4 shows an example in which a collecting magnet roller is housed in a non-magnetic sleeve as a means for collecting and re-supplying removed developer, and parts common to the device shown in the second figure above are denoted by the same numbers. ing. A collection magnet roller 15' is disposed within a non-magnetic sleeve 18 made of aluminum or the like disposed below the blade 14, and the surface of the sleeve 18 is configured to be grounded or to be able to apply a desired potential.
スリーブ表面の付着現像剤層厚は、スクレーパ
ー１７にて規制され、所定厚さとされ、次いでス
リーブ表面の現像剤は、反時計方向に移動してド
ラム表面に対面する位置に至る。そしてドラム−
スリーブ間の電界により現像剤はドラム表面へ飛
翔し、同時に現像剤中に混入した研摩剤もドラム
表面へ転移する。こうして十分な研摩剤が、クリ
ーニングブレード部へ到達し、良好な研摩クリー
ニングが成される。 The thickness of the developer layer adhering to the sleeve surface is regulated by the scraper 17 to a predetermined thickness, and then the developer on the sleeve surface moves counterclockwise to a position facing the drum surface. And the drums-
The electric field between the sleeves causes the developer to fly to the drum surface, and at the same time, the abrasive mixed in the developer is also transferred to the drum surface. In this way, sufficient abrasive reaches the cleaning blade portion and good abrasive cleaning is achieved.
特に非磁性スリーブ間にマグネツトローラを収
容した場合には、マグネツトローラの磁極位置に
よる現像剤の不均一性が均らされ、現像剤の供給
が一層均一化され好ましい。 Particularly, when the magnet roller is housed between non-magnetic sleeves, non-uniformity of the developer due to the position of the magnetic pole of the magnet roller is evened out, and the supply of the developer becomes more uniform, which is preferable.
以上、具体的にて詳述した如く、本発明にて
は、クリーニング研摩に先立つて、除去現像剤中
の研摩剤を補給するので、常に十分な研摩クリー
ニング効果を得られる優れたものである。 As described above in detail, in the present invention, the abrasive agent in the removed developer is replenished prior to cleaning and polishing, so that a sufficient polishing and cleaning effect can always be obtained.
第１図は、本発明を適用する具体例画像形成装
置の側面図、第２図は、本発明に基づく具体例ク
リーニング装置の説明図、第３図は、第２図示装
置の変形例説明図、第４図は、本発明に基づく更
なる変形例クリーニング装置の説明図。
図中、１；感光体ドラム（像担持体）、２；前
除電用コロナ放電器、３；一次コロナ放電器、
４；二次コロナ放電器、５；現像器、６；トナー
容器、１４；クリーニングブレード、１５；トナ
ー捕集用マグネツトローラー、１６；搬送用スク
リユー。
FIG. 1 is a side view of a specific example image forming apparatus to which the present invention is applied, FIG. 2 is an explanatory diagram of a specific example cleaning device based on the present invention, and FIG. 3 is an explanatory diagram of a modification of the second illustrated device. , FIG. 4 is an explanatory diagram of a further modification of the cleaning device based on the present invention. In the figure, 1; photosensitive drum (image carrier); 2; corona discharger for pre-static elimination; 3; primary corona discharger;
4: Secondary corona discharger, 5: Developing device, 6: Toner container, 14: Cleaning blade, 15: Magnetic roller for toner collection, 16: Screw for conveyance.
Claims (1)
除去するクリーニング装置において、 像担持体表面へ当接して上記現像剤を掻き取る
クリーニング手段と、このクリーニング手段より
像担持体移動方向上流側へ配置された磁界発生手
段と、この磁界発生手段に対して像担持体と磁界
発生手段との間隔よりも小さい厚さに上記現像剤
を形成する手段と、上記磁界発生手段と像担持体
との間に磁界発生手段の周囲に保持された現像剤
を像担持体表面に供給するような電界を形成する
手段と、を有することを特徴とするクリーニング
装置。[Scope of Claims] 1. A cleaning device for removing magnetic developer mixed with an abrasive from an image carrier, comprising a cleaning means for scraping off the developer by contacting the surface of the image carrier, and a cleaning device for removing the magnetic developer mixed with an abrasive from the image carrier. a magnetic field generating means disposed on the upstream side in the body movement direction; a means for forming the developer to a thickness smaller than the distance between the image carrier and the magnetic field generating means with respect to the magnetic field generating means; and the magnetic field generating means. and means for forming an electric field between the image carrier and the image carrier to supply the developer held around the magnetic field generating means to the surface of the image carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9045481A JPH0237597B2 (en) | 1981-06-12 | 1981-06-12 | KURIININGUSOCHI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9045481A JPH0237597B2 (en) | 1981-06-12 | 1981-06-12 | KURIININGUSOCHI |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57204577A JPS57204577A (en) | 1982-12-15 |
| JPH0237597B2 true JPH0237597B2 (en) | 1990-08-24 |
Family
ID=13999061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9045481A Expired - Lifetime JPH0237597B2 (en) | 1981-06-12 | 1981-06-12 | KURIININGUSOCHI |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0237597B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2668939B2 (en) * | 1988-05-20 | 1997-10-27 | 富士ゼロックス株式会社 | Cleaning equipment |
| JPH0283556A (en) * | 1988-09-20 | 1990-03-23 | Minolta Camera Co Ltd | Color image forming device |
| US5349429A (en) * | 1993-11-09 | 1994-09-20 | Xerox Corporation | Cleaner blade lubricating system |
-
1981
- 1981-06-12 JP JP9045481A patent/JPH0237597B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57204577A (en) | 1982-12-15 |
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