JPS60186887A - Blade cleaning device - Google Patents
Blade cleaning deviceInfo
- Publication number
- JPS60186887A JPS60186887A JP4247984A JP4247984A JPS60186887A JP S60186887 A JPS60186887 A JP S60186887A JP 4247984 A JP4247984 A JP 4247984A JP 4247984 A JP4247984 A JP 4247984A JP S60186887 A JPS60186887 A JP S60186887A
- Authority
- JP
- Japan
- Prior art keywords
- guide plate
- blade
- housing
- developer
- cleaning 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
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)
Abstract
Description
【発明の詳細な説明】
一産業上の利用分野一
本発明は例えば電子写真複写機に用いるクリーニング装
置に関し、特に、ブレードクリーニング装置に付設した
現像剤案内板の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cleaning device used, for example, in an electrophotographic copying machine, and particularly relates to an improvement in a developer guide plate attached to a blade cleaning device.
一従来技術一
周知のように、電子写真複写機の感光体ドラムの周面を
清浄な状態に保つためのクリーニング装置としては、ウ
エブクリー二〉′グ装置、ローラクリーニング装置等の
幾多の構造や方式のものが知られているけれども、その
ひとつであるブレードクリーニング装置においては、先
端を感光体ドラム周面に圧接されるブレードで、周面に
付着した残留現像剤をかき取る。1. Prior Art 1. As is well known, there are many structures and methods of cleaning devices for keeping the circumferential surface of the photoreceptor drum of an electrophotographic copying machine clean, such as a web cleaning device and a roller cleaning device. One such device, a blade cleaning device, uses a blade whose tip is brought into pressure contact with the circumferential surface of the photoreceptor drum to scrape off residual developer attached to the circumferential surface of the photoreceptor drum.
ところで、このブレードクリーニング装置にあっては、
ブレードで残留現像剤をかき取るだけでは、クリーニン
グ装置のハウジング中へかき取った現像剤を効果的に回
収することが困難なため、前記ブレードの直下にマイラ
ー紙等からなる現像剤案内板を位置し、同現像剤案内板
の先端を感光体ドラムの周面に軽く当てがって、現像剤
案内板に沿ってかき取現像剤をハウジング内に導びくよ
うにしている（例えば、特公昭５４−３６５０１号公報
、特公昭５４−３４３４０号公報）。即ち、このマイラ
ー紙等の現像剤案内板は、曲げ剛性が非常に小さいので
、傷付き易い感光体ドラムの周面に当てかっても、感光
体ドラムの周面を痛めることがないことをねらったもの
である。しかしながら、このような現像剤案内板を用い
ての長時間運転後、感光体ドラムの周面を観察したとこ
ろ、周面にかなりの傷が付き、感光体ドラムの寿命を短
かくすることが解かった。この理由は、感光体ドラムの
周面に現像剤を構成する金属粉のキャリヤ等の異物が付
着し、これが現像剤案内板の先端と感光体周面の間に狭
まると、現像剤案内板を構成するマイラー紙の表面硬さ
が割合に高く、しかもマイラー紙は局部的に変形できな
いので、マイラー紙の曲げ反力が異物に集中し、異物が
強く感光体ドラムの周面に押付けられる結果であると思
われる。By the way, with this blade cleaning device,
Since it is difficult to effectively collect the scraped developer into the housing of the cleaning device by simply scraping off the residual developer with a blade, a developer guide plate made of Mylar paper or the like is placed directly below the blade. The tip of the developer guide plate is lightly applied to the circumferential surface of the photoreceptor drum, and the developer is scraped along the developer guide plate and guided into the housing (for example, -36501, Japanese Patent Publication No. 54-34340). In other words, since the developer guide plate made of Mylar paper or the like has very low bending rigidity, it was designed so that it would not damage the circumferential surface of the photoconductor drum even if it came into contact with the easily damaged circumferential surface of the photoconductor drum. It is something. However, when the circumferential surface of the photoreceptor drum was observed after long-term operation using such a developer guide plate, it was found that the circumferential surface was considerably scratched, which shortened the life of the photoreceptor drum. won. The reason for this is that foreign matter, such as a carrier of metal powder constituting the developer, adheres to the circumferential surface of the photoreceptor drum, and when it gets narrowed between the tip of the developer guide plate and the circumferential surface of the photoreceptor, the developer guide plate becomes The surface hardness of the constituent Mylar paper is relatively high, and the Mylar paper cannot be locally deformed, so the bending reaction force of the Mylar paper concentrates on the foreign matter, and the foreign matter is strongly pressed against the circumferential surface of the photoreceptor drum. It appears to be.
−発明の目的一
本発明の目的は、以」二に述べたようなブレードクリー
ニング装置の問題に鑑み、感光体ドラムの周面に金属粉
等の硬い異物が付着しても、現像剤案内板により感光体
ドラム周面が傷付くことのない構造を得るにある。-Object of the Invention 1 In view of the problems of the blade cleaning device as described below, an object of the present invention is to prevent the developer guide from being removed even if hard foreign matter such as metal powder adheres to the circumferential surface of the photoreceptor drum. To obtain a structure in which the circumferential surface of a photoreceptor drum is not damaged.
−発明の構成−
この目的を達成するための本発明を要約すれば、感光体
ドラムの周面に付着した残留現像剤をブレードでかき取
り、同周面に先端を軽く圧接する現像剤案内板でかき取
り現像剤を、ハウジング中へ回収するブレードクリーニ
ング装置において、帯状に成形した発泡樹脂材で前記現
像剤案内板を構成することを提案するものである。-Structure of the Invention- To summarize the present invention for achieving this object, there is a developer guide plate that scrapes off the residual developer attached to the circumferential surface of the photoreceptor drum with a blade and lightly presses its tip against the circumferential surface of the photoreceptor drum. In a blade cleaning device that collects scraped developer into a housing, it is proposed that the developer guide plate be formed of a foamed resin material formed into a belt shape.
一実施例− 以下、図面について本発明の実施例の詳細を説明する。One example- Embodiments of the invention will now be described in detail with reference to the drawings.
第１図は本発明によるブレードクリーニング装置の断面
図であって、図中、符号ｌは感光体ドラムを、符号２は
クリーニング装置のハウジングを示し、感光体ドラム１
の図面１ａに対向する側面を解放されたハウジング２の
内部には、先端を感光体ドラム１の周面１ａに圧接する
ブレード３及び／＼ウジング２中に回収された現像剤を
外部へ排出するスクリュコンベア４を内蔵しである。そ
して、／＼ウジング２の開口部には前記ブレード３の直
下に位置する発泡樹脂製の現像剤案内板５が取付ねじ６
で固定してあり、同現像剤案内板５の先端下面５ａを感
光体ドラム１の周面１ａに軽く当接しである。第１図の
紙面と直角な方向に伸びた現像剤案内板５は、図示例の
場合、発泡スチロールを用いて先端５ｂを鋭角にかつ基
端を厚くした断面形状に形成したものである。FIG. 1 is a cross-sectional view of a blade cleaning device according to the present invention, in which reference numeral 1 indicates a photoreceptor drum, and reference numeral 2 indicates a housing of the cleaning device.
Inside the housing 2, whose side surface facing the drawing 1a is open, there is a blade 3 whose tip is pressed against the circumferential surface 1a of the photoreceptor drum 1, and a housing 2 for discharging the developer collected in the housing 2 to the outside. It has a built-in screw conveyor 4. A developer guide plate 5 made of foamed resin located directly below the blade 3 is attached to the opening of the housing 2 with mounting screws 6.
The lower end surface 5a of the developer guide plate 5 is in light contact with the circumferential surface 1a of the photosensitive drum 1. In the illustrated example, the developer guide plate 5 extending in a direction perpendicular to the plane of the paper in FIG. 1 is formed of polystyrene foam and has a cross-sectional shape with a tip 5b at an acute angle and a base end thick.
この目的に用いる現像剤案内板としては、発泡スチロー
ルばかりでなく、他の発泡樹脂でもよいが、重要な点は
、断面形状の選定によってハウジング２を機体フレーム
（図示せず）から取外す際に、現像剤案内板５の先端に
付着した現像剤を外部へこぼすことのない形状が与えら
れる点と、かなり厚みのあるものでも発泡樹脂成形品の
曲げ剛性を、薄いマイラー紙相当程度にとどめることが
できることにある。また、現像剤案内板５の成形上で注
意すべき点は、現像剤案内板５の外表面（特に先端部）
に顕著な表皮がないか、極めて薄い表皮の状態にとどめ
ることにある。即ち１発泡樹脂の厚い表皮は、後述から
明らかになるように、本発明の利点である発泡隔壁ａの
柔軟な局部変形の傷害になり、現像剤案内板５の厚み方
向の曲げ剛性をも大にする弊害がある。The developer guide plate used for this purpose may be made of not only Styrofoam but also other foamed resin, but the important point is that the cross-sectional shape allows the developer guide plate to be used when removing the housing 2 from the machine frame (not shown). The shape of the developer guide plate 5 prevents the developer attached to the tip from spilling to the outside, and the bending rigidity of the foamed resin molded product can be kept to the same level as that of thin Mylar paper even if it is quite thick. It is in. In addition, the points to be noted when forming the developer guide plate 5 are the outer surface of the developer guide plate 5 (especially the tip part)
The goal is to either have no noticeable epidermis or to keep it in a very thin epidermal state. In other words, as will become clear from the description below, the thick skin of the foamed resin 1 impedes the flexible local deformation of the foamed partition wall a, which is an advantage of the present invention, and also greatly reduces the bending rigidity of the developer guide plate 5 in the thickness direction. There are disadvantages to doing so.
図示実施例は、以ヒのような構造であるから、現像剤案
内板の断面形状や厚みの選定によってハウジング取外し
時の現像剤こぼれや現像剤案内板の接触による感光面の
傷付きを防止できる。即ち、発泡樹脂製の現像剤案内板
５の表面硬さは、極めて薄い発泡隔壁ａ自体の硬さで決
まるから、感光体ドラム１の周面１ａに対する接触部の
表面硬さは、従来のマイラー紙よりもはるかに低く、そ
れだけ感光面即ち周面１ａを傷付けることがない。また
、第２図示のように、感光体ドラム１の周面に金属粉等
のような硬い異物Ｘが付着している場合には、異物Ｘに
対応した発泡隔壁ａが局部的に変形し、異物が発泡隔壁
ａで包み込まれたようになり、現像剤案内板５の曲げ反
力が周面１ａに対する他の接触部に分散されるので、異
物Ｘによって感光面が傷付けられることもない。Since the illustrated embodiment has the structure as shown below, by selecting the cross-sectional shape and thickness of the developer guide plate, it is possible to prevent developer from spilling when the housing is removed and from damaging the photosensitive surface due to contact with the developer guide plate. . That is, since the surface hardness of the developer guide plate 5 made of foamed resin is determined by the hardness of the extremely thin foamed partition wall a itself, the surface hardness of the contact portion with the circumferential surface 1a of the photoreceptor drum 1 is different from that of the conventional Mylar. It is much lower than paper and will not damage the photosensitive surface, that is, the peripheral surface 1a. Further, as shown in the second diagram, when hard foreign matter X such as metal powder is attached to the circumferential surface of the photoreceptor drum 1, the foamed partition wall a corresponding to the foreign matter X is locally deformed. The foreign matter is now surrounded by the foamed partition wall a, and the bending reaction force of the developer guide plate 5 is dispersed to other contact parts with respect to the peripheral surface 1a, so that the photosensitive surface is not damaged by the foreign matter X.
一発明の効果−
以上の説明から明らかなように、本発明によれば、感光
体ドラム周面に付着した硬い異物で感光面を傷めること
のないブレードクリーニング装置の現像剤を受ける現像
剤案内板を得ることができる。Effects of the Invention As is clear from the above description, according to the present invention, the developer guide plate for receiving the developer of the blade cleaning device prevents the photoconductor surface from being damaged by hard foreign matter attached to the circumferential surface of the photoconductor drum. can be obtained.
第１図は本発明によるブレードクリーニング装置の断面
図、第２図は同クリーニング装置要部の拡大断面図であ
る。
ｌ・・・感光体ドラム、
１ａ・・・（感光体ドラムの）周面、
２・・・ハウジング、３・・・ブレード、５・・・現像
剤案内板、 Ｘ・・・異物、特許出願人 小四六写真工
業株式会社FIG. 1 is a sectional view of a blade cleaning device according to the present invention, and FIG. 2 is an enlarged sectional view of the essential parts of the cleaning device. l...Photosensitive drum, 1a...Surrounding surface (of the photosensitive drum), 2...Housing, 3...Blade, 5...Developer guide plate, X...Foreign object, patent application People Koshiroku Photo Industry Co., Ltd.
Claims (1)
ドでかき取り、同周面に先端を軽く圧接する現像剤案内
板でかき取り現像剤を、ハウジング中へ回収するブレー
ドクリーニング装置において、帯状に成形した発泡樹脂
材で前記現像剤案内板を構成したことを特徴とするブレ
ードクリーニング装置。1) In a blade cleaning device that scrapes residual developer attached to the circumferential surface of the photoreceptor drum with a blade and collects the developer into the housing using a developer guide plate whose tip is lightly pressed against the circumferential surface. A blade cleaning device characterized in that the developer guide plate is made of a foamed resin material formed into a belt shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4247984A JPS60186887A (en) | 1984-03-06 | 1984-03-06 | Blade cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4247984A JPS60186887A (en) | 1984-03-06 | 1984-03-06 | Blade cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60186887A true JPS60186887A (en) | 1985-09-24 |
Family
ID=12637196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4247984A Pending JPS60186887A (en) | 1984-03-06 | 1984-03-06 | Blade cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60186887A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE34384E (en) * | 1986-09-22 | 1993-09-21 | Mita Industrial Co., Ltd. | Cleaning unit in electrophotographic copier |
| EP0632347A1 (en) * | 1993-06-30 | 1995-01-04 | Xerox Corporation | Apparatus for cleaning a surface |
-
1984
- 1984-03-06 JP JP4247984A patent/JPS60186887A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE34384E (en) * | 1986-09-22 | 1993-09-21 | Mita Industrial Co., Ltd. | Cleaning unit in electrophotographic copier |
| EP0632347A1 (en) * | 1993-06-30 | 1995-01-04 | Xerox Corporation | Apparatus for cleaning a surface |
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