JPH0634134B2 - Cleaning device - Google Patents
Cleaning deviceInfo
- Publication number
- JPH0634134B2 JPH0634134B2 JP58141949A JP14194983A JPH0634134B2 JP H0634134 B2 JPH0634134 B2 JP H0634134B2 JP 58141949 A JP58141949 A JP 58141949A JP 14194983 A JP14194983 A JP 14194983A JP H0634134 B2 JPH0634134 B2 JP H0634134B2
- Authority
- JP
- Japan
- Prior art keywords
- guide roller
- toner
- image forming
- cleaning device
- forming body
- 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
- 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
- G03G21/0011—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 using a blade; Details of cleaning blades, e.g. blade shape, layer forming
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、電子写真複写機等記録装置の像形成体のクリ
ーニング装置に関し、特に、移動する像形成体の表面か
ら残留トナーを掻き落す掻き落し部材と、掻き落された
現像剤を表面に受けて像形成体の表面から遠ざけるよう
に搬送するガイドローラと、該ガイドローラに接触して
ガイドローラから現像剤を分離して落す分離部材とを備
えたクリーニング装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for an image forming body of a recording apparatus such as an electrophotographic copying machine, and more particularly to a scraping device for scraping off residual toner from the surface of a moving image forming body. A drop member, a guide roller that receives the scraped developer on the surface and conveys the developer away from the surface of the image forming body, and a separation member that contacts the guide roller and separates and drops the developer from the guide roller. The present invention relates to a cleaning device.
上述のようなクリーニング装置としては第１図に示した
ような構造のものが一般的である。第１図においては、
１は表面に電子写真感光体や誘電体から成る像形成層を
有し、矢印方向に回転する像形成体ドラム、２は支軸３
を中心に反時計方向に回動させることができるクリーニ
ング装置枠、４はクリーニング装置枠２に対し軸５を中
心に回動可能に取付けられた保持枠６によつて保持さ
れ、先端を像形成体ドラム１の表面に圧接されるゴム板
あるいは樹脂板等から成る掻き落し部材、７は掻き落し
部材４が像形成体ドラム１の表面から掻き落した残留ト
ナー等の現像剤を表面に受けて、像形成体ドラム１の表
面から遠ざけるように搬送する、矢印方向に回転するガ
イドローラ、８はガイドローラ７の表面に接触して、ガ
イドローラ７からトナー等を分離させて落すポリエステ
ル等の樹脂板から成る分離部材である。The cleaning device as described above generally has a structure as shown in FIG. In FIG. 1,
Reference numeral 1 denotes an image forming drum having an image forming layer made of an electrophotographic photosensitive member or a dielectric on the surface thereof, and rotating in the direction of the arrow.
The cleaning device frame 4, which can be rotated counterclockwise around the center, is held by a holding frame 6 rotatably attached to the cleaning device frame 2 about a shaft 5, and the front end is image-formed. A scraping member made of a rubber plate, a resin plate, or the like, which is pressed against the surface of the body drum 1, a scraping member 4 receives on the surface a developer such as residual toner scraped from the surface of the image forming body drum 1. , A guide roller that rotates away from the surface of the image forming drum 1 and that rotates in the direction of the arrow, 8 is a resin such as polyester that contacts the surface of the guide roller 7 and separates toner and the like from the guide roller 7 to drop it It is a separating member made of a plate.
このような構成の従来のクリーニング装置は、ガイドロ
ーラ７に表面が滑らかなゴム等の弾性体から成る弾性表
層 7a を有するものを用いている。The conventional cleaning device having such a structure uses the guide roller 7 having the elastic surface layer 7a made of an elastic material such as rubber having a smooth surface.
それは、ガイドローラ７と像形成体ドラム１の間隙から
トナー等がこぼれたりすることのないようにガイドロー
ラ７を像形成体ドラム１の表面に接近させて、その間に
ごみや紙粉等の異物が挾み込まれても、像形成体ドラム
１の表面が傷付けられないため、および、ガイドローラ
７の表面のトナー等の搬送性を向上させるためである。
しかし、弾性表層 7a を有していても、表面が滑らかで
あるためトナー等が滑つて、特にガイドローラ７と感光
体ドラム１の表面の接近している部分に溜り易いという
問題がある。そして、このようにトナー等が溜ると、そ
れが像形成体の性能に悪影響を及ぼすことがあつたり、
また、クリーニング装置枠２を反時計方向に回動させて
保守を行うような場合に、トナー等がこぼれ記録装置の
内部を汚したりすることが起る。That is, the guide roller 7 is brought close to the surface of the image forming body drum 1 so that toner or the like does not spill out from the gap between the guide roller 7 and the image forming body drum 1, and foreign matter such as dust or paper dust is provided between them. This is because the surface of the image forming drum 1 is not damaged even when the toner is caught, and the transportability of toner and the like on the surface of the guide roller 7 is improved.
However, even if the elastic surface layer 7a is provided, there is a problem that the surface of the guide roller 7 and the photosensitive drum 1 tend to be accumulated on the surface of the photosensitive drum 1 due to slipping of the toner because the surface is smooth. And, if the toner or the like accumulates, it may adversely affect the performance of the image forming body.
Further, when the cleaning device frame 2 is rotated counterclockwise for maintenance, toner or the like may be spilled and stain the inside of the recording device.
このトナー等の溜ることを防止するために、弾性表層 7
a の表面に凹凸や溝を付けて、ガイドローラ７の搬送性
を向上させることは容易に考えられる。しかし、それに
は、分離部材８によつてガイドローラ７の表面からトナ
ー等を分離することが十分に行われなくなつたり、ある
いは、分離部材８が振動してトナー等を飛散させ、クリ
ーニング装置枠２と像形成体ドラム１の間隙からトナー
の吹き出しが生ずるようになつたり、分離部材８の損耗
することが著しくなつたりする問題が伴う。In order to prevent the accumulation of toner etc., the elastic surface layer 7
It is easily conceivable to improve the transportability of the guide roller 7 by providing irregularities or grooves on the surface of a. However, the separation member 8 may not sufficiently separate the toner or the like from the surface of the guide roller 7, or the separation member 8 may vibrate to scatter the toner or the like, and the cleaning device frame may be removed. Toner is blown out from the gap between the image forming body drum 1 and the image forming body drum 1, and the separation member 8 is worn out significantly.
本発明は、上述のような従来のクリーニング装置におけ
る問題を解消するためになされたものであり、ガイドロ
ーラの搬送性を向上させて像形成体表面との間にトナー
等の溜ることをなくし、しかも、ガイドローラからのト
ナー等の分離が十分に行われて、分離部材が損耗したり
トナー等を飛散させたりすることも少なく、像形成体表
面を傷付けることもないクリーニング装置を提供するも
のである。The present invention has been made to solve the problems in the conventional cleaning device as described above, and improves the transportability of the guide roller to prevent the accumulation of toner and the like between the surface of the image forming body, Moreover, a cleaning device is provided in which the toner and the like are sufficiently separated from the guide roller, the separation member is not worn or the toner or the like is scattered, and the surface of the image forming body is not damaged. is there.
本発明は、移動する像形成体の表面から残留現像剤を掻
き落す掻き落し部材と、掻き落された現像剤を表面に受
けて像形成体の表面から遠ざけるように搬送するガイド
ローラと、該ガイドローラに接触してガイドローラから
現像剤を分離する分離部材とを備えたクリーニング装置
において、前記ガイドローラは、該ガイドローラの表面
に１μｍ以上で200 μｍ以下の直径の孔が分布するスポ
ンジ層が設けられ、前記像形成体の表面に接触して従動
回転することを特徴とするクリーニング装置、にある。The present invention includes a scraping member that scrapes off a residual developer from the surface of a moving image forming body, a guide roller that receives the scraped developer on the surface and conveys the developer away from the surface of the image forming body, In a cleaning device including a separating member that comes into contact with a guide roller and separates the developer from the guide roller, the guide roller has a sponge layer in which holes having a diameter of 1 μm or more and 200 μm or less are distributed on the surface of the guide roller. Is provided, and the cleaning device is characterized in that the cleaning device comes into contact with the surface of the image forming body and is driven to rotate.
以下、本発明を第１図及び第２図を参照して説明する。 Hereinafter, the present invention will be described with reference to FIGS. 1 and 2.
本発明は、第１図に示したようなクリーニング装置にお
いて、ガイドローラ７の弾性表層 7a にトナー等が入り
込み得る適当な大きさの孔が表面に開口するスポンジ、
例えばクロロプレンゴムから成るスポンジを用い、そし
て、ガイドローラ７を像形成体の表面に接触して従動回
転するものとしたことによつて、前記目的を達成したも
のである。The present invention relates to a cleaning device as shown in FIG. 1, in which a sponge having holes of an appropriate size for allowing toner and the like to enter the elastic surface layer 7a of the guide roller 7 is formed on the surface,
For example, a sponge made of chloroprene rubber is used, and the guide roller 7 is driven to rotate in contact with the surface of the image forming body, thereby achieving the above object.
本発明において、ガイドローラ７のスポンジから成る弾
性表層 7a の表面に分布する孔が総べてトナー等の入り
込めない程小さなものであると、トナー等の搬送性が従
来のゴム被覆のガイドローラと殆んど変らなくなつて、
トナー等が像形成体の表面との間に溜り易くなるし、ま
た、像形成体表面との摩擦係数が減少し、さらに、表面
の孔が小さいと云うことは内部の孔もまた小さいと云う
ことで、弾性表層 7a の圧縮性も小さくなるから、ガイ
ドローラ７の従動回転に滑りが生じ易くなつて、像形成
体の表面を損耗させ易くもなる。したがつて、スポンジ
の弾性表層 7a は表面にトナー等の入り込み得る大きさ
の孔が分布しているものであることが必要である。しか
し、その孔が総べて直径200 μｍよりも大きくなると、
今度は従来のゴム被覆ガイドローラの表面に凹凸や溝を
付けた場合と同様の問題が生ずるようになる。したがつ
て、ガイドローラ７の弾性表層 7a は、表面に現像剤の
粒径以上で200 μｍ以下の直径の孔が多く分布する前記
の如きスポンジから成るものであることを必要とし、全
部の孔がこの範囲にあるようなものが好ましいが、多少
の小さい孔や大きい孔を含むものであつてもよい。この
ような弾性表層 7a を用いたことによつて、ガイドロー
ラ７を像形成体の表面と接触させて従動回転するものと
しても、弾性表層 7a の圧縮性と摩擦係数が優れるか
ら、ガイドローラ７は像形成体の表面と滑りなく同一速
度で回転して、像形成体の表面を損耗させること少な
く、そして、弾性表層 7a の表面の孔が掻き取り部材４
で掻き落されたトナー等を引掛けるようにして運ぶか
ら、搬送性が向上して、トナー等の溜ることが無くな
り、しかも、分離部材８が振動したり、分離部材８によ
るガイドローラ７からのトナー等の分離が不十分になつ
たりすることもない、と云う優れた結果が得られる。In the present invention, if all the holes distributed on the surface of the elastic surface layer 7a made of sponge of the guide roller 7 are so small that the toner and the like cannot enter, the transportability of the toner and the like is the conventional rubber-coated guide roller. With almost no change,
Toner and the like are likely to accumulate between the surface of the image forming body, the friction coefficient with the surface of the image forming body is reduced, and the fact that the surface pores are small means that the internal pores are also small. As a result, the compressibility of the elastic surface layer 7a is also reduced, so that the driven roller of the guide roller 7 easily slips, and the surface of the image forming body is easily worn. Therefore, it is necessary that the elastic surface layer 7a of the sponge has pores of a size that allows the entry of toner and the like to be distributed on the surface. However, if all the holes are larger than 200 μm in diameter,
This time, the same problem as in the case where the surface of the conventional rubber-coated guide roller is provided with irregularities or grooves occurs. Therefore, the elastic surface layer 7a of the guide roller 7 needs to be made of the sponge as described above in which a large number of holes having a diameter not less than 200 μm and not less than the particle size of the developer are distributed on the surface. Is preferably in this range, but it may be one containing a small hole or a large hole. By using such an elastic surface layer 7a, even if the guide roller 7 is rotated by being brought into contact with the surface of the image forming body, the elastic surface layer 7a has excellent compressibility and friction coefficient. Is rotated at the same speed as the surface of the image forming body without slipping, so that the surface of the image forming body is not worn out, and the holes on the surface of the elastic surface layer 7a are scraped off.
Since the toner and the like scraped off by the carrier are conveyed by being hooked, the transportability is improved, the toner and the like are not accumulated, and the separating member 8 vibrates and the separating member 8 moves the guide roller 7 from the guide roller 7. It is possible to obtain the excellent result that the separation of the toner and the like does not become insufficient.
第２図は、ガイドローラ７の弾性表層 7a の表面がトナ
ー等を搬送して、分離部材８によりトナー等を分離され
る状態を示しており、弾性表層 7a の表面には孔の内部
を含めて分子間力によりトナー粒子が薄く比較的強固に
付着するが、その上に乗つているトナー等は、トナー同
志の静電的斥力も働いていて、軽く乗つている状態にあ
る。そして、弾性表層 7a の孔は、内部が一様にトナー
等で充填された状態にはならずに、相当の空間を残して
トナー等を引掛けて搬送するように働く。このようにト
ナー等を搬送した孔が分離部材８の軽く圧接している位
置に達すると、孔の縁が分離部材８に押されて、孔の形
状が変形するようになり、その変形の作用で孔に入り込
んでいたトナー等が図示のように跳ね出されて、トナー
等は弾性表層 7a から分離し、クリーニング装置枠２の
底に落下するようになる。それによつて、ガイドローラ
７で搬送されたトナー等は、弾性表層 7a の表面に薄く
付着して残り表面の保護効果を与えるトナーは別にし
て、殆んどがガイドローラ７から分離され、ガイドロー
ラ７は効率的な搬送を続けることができる。FIG. 2 shows a state in which the surface of the elastic surface layer 7a of the guide roller 7 conveys toner and the like and is separated by the separating member 8. The surface of the elastic surface layer 7a includes the inside of the holes. Due to the intermolecular force, the toner particles are thinly and relatively firmly attached, but the toner and the like on the toner particles are in a state of being lightly loaded due to the electrostatic repulsive force of the toners working together. The holes in the elastic surface layer 7a do not become uniformly filled with toner or the like inside, but serve to catch and convey the toner or the like leaving a considerable space. When the hole for transporting the toner or the like reaches the position where the separation member 8 is lightly pressed, the edge of the hole is pushed by the separation member 8 and the shape of the hole is deformed. The toner or the like that has entered the hole is ejected as shown in the figure, and the toner or the like separates from the elastic surface layer 7a and falls to the bottom of the cleaning device frame 2. As a result, most of the toner conveyed by the guide roller 7 is separated from the guide roller 7 except for the toner that thinly adheres to the surface of the elastic surface layer 7a and provides the remaining surface protection effect. The roller 7 can continue efficient transportation.
本発明によれば、ガイドローラと像形成体表面との間か
らトナー等がこぼれ落ちたり、そこにトナー等が溜るこ
ともなく、像形成体や分離部材の損耗することも少なく
て、ガイドローラが効率的にトナー等をクリーニング装
置枠のトナー溜りへと搬送すると云う優れた効果が得ら
れる。According to the present invention, the toner or the like does not spill out from between the guide roller and the surface of the image forming body, the toner or the like does not accumulate there, and the image forming body and the separating member are less likely to wear, and the guide roller is The excellent effect of efficiently transporting the toner and the like to the toner reservoir of the cleaning device frame can be obtained.
第１図は本発明に関係するクリーニング装置の例を示す
断面図、第２図は本発明クリーニング装置のガイドロー
ラ表面部分の拡大断面図である。 １……像形成体ドラム、２……クリーニング装置枠、 ３……支軸、４……掻き落し部材、 ５……軸、６……保持枠、 ７……ガイドローラ、７a ……弾性表層、 ８……分離部材。FIG. 1 is a sectional view showing an example of a cleaning device relating to the present invention, and FIG. 2 is an enlarged sectional view of a guide roller surface portion of the cleaning device of the present invention. 1 ... Image forming drum, 2 ... Cleaning device frame, 3 ... Support shaft, 4 ... Scraping member, 5 ... Shaft, 6 ... Holding frame, 7 ... Guide roller, 7a ... Elastic surface layer , 8 ... Separation member.
Claims (1)
掻き落す掻き落し部材と、掻き落された現像剤を表面に
受けて像形成体の表面から遠ざけるように搬送するガイ
ドローラと、該ガイドローラに接触してガイドローラか
ら現像剤を分離する分離部材とを備えたクリーニング装
置において、前記ガイドローラは、該ガイドローラの表
面に１μｍ以上で200 μｍ以下の直径の孔が分布するス
ポンジ層が設けられ、前記像形成体の表面に接触して従
動回転することを特徴とするクリーニング装置。1. A scraping member for scraping off residual developer from the surface of a moving image forming body, and a guide roller for receiving the scraped developer on the surface and conveying the developer away from the surface of the image forming body. In a cleaning device provided with a separating member that comes into contact with the guide roller and separates the developer from the guide roller, the guide roller is a sponge in which holes having a diameter of 1 μm or more and 200 μm or less are distributed on the surface of the guide roller. A cleaning device provided with a layer, which is brought into contact with the surface of the image forming body and is driven to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141949A JPH0634134B2 (en) | 1983-08-04 | 1983-08-04 | Cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141949A JPH0634134B2 (en) | 1983-08-04 | 1983-08-04 | Cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6033582A JPS6033582A (en) | 1985-02-20 |
| JPH0634134B2 true JPH0634134B2 (en) | 1994-05-02 |
Family
ID=15303875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58141949A Expired - Lifetime JPH0634134B2 (en) | 1983-08-04 | 1983-08-04 | Cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634134B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220391A (en) * | 1990-07-16 | 1993-06-15 | Minolta Camera Kabushiki Kaisha | Image forming apporating having cleaning roller rotatable at different speeds during periods of image formation and non-image formation |
| JP2007140375A (en) * | 2005-11-22 | 2007-06-07 | Fuji Xerox Co Ltd | Cleaning apparatus and image forming apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320933A (en) * | 1976-08-11 | 1978-02-25 | Ricoh Co Ltd | Cleaning device for photo-sensitive body |
| JPS56121067A (en) * | 1980-02-29 | 1981-09-22 | Fuji Xerox Co Ltd | Toner supplier of electronic copying machine |
| JPS5719773A (en) * | 1981-05-14 | 1982-02-02 | Toshiba Corp | Cleaning device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49105127U (en) * | 1972-12-19 | 1974-09-09 |
-
1983
- 1983-08-04 JP JP58141949A patent/JPH0634134B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320933A (en) * | 1976-08-11 | 1978-02-25 | Ricoh Co Ltd | Cleaning device for photo-sensitive body |
| JPS56121067A (en) * | 1980-02-29 | 1981-09-22 | Fuji Xerox Co Ltd | Toner supplier of electronic copying machine |
| JPS5719773A (en) * | 1981-05-14 | 1982-02-02 | Toshiba Corp | Cleaning device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6033582A (en) | 1985-02-20 |
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