JPS60230680A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS60230680A JPS60230680A JP8715384A JP8715384A JPS60230680A JP S60230680 A JPS60230680 A JP S60230680A JP 8715384 A JP8715384 A JP 8715384A JP 8715384 A JP8715384 A JP 8715384A JP S60230680 A JPS60230680 A JP S60230680A
- Authority
- JP
- Japan
- Prior art keywords
- brush
- conductive
- photoreceptor
- image forming
- cleaning
- 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
- G03G21/0035—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 brush; Details of cleaning brushes, e.g. fibre density
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は感光体表面を摺擦する導電性毛ブラシを有する
画像形成装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus having a conductive bristle brush that rubs the surface of a photoreceptor.
従来の電子写真複写機では公知の電子写真プロセスによ
って感光体上に形成されたトナー像は転写装置によって
転写紙上に転写されるが、この際感光体上のトナー像は
１００％転写紙上に移る訳ではなく９通常２０〜４０％
程度のトナーは未転写のまま感光体上に残存する。従っ
て次の新たなプロセスに影響を与えないように転写後感
光体上に残存するトナーを取り除いておかなければなら
ず、このためのクリーニング装置が設けられている。In conventional electrophotographic copying machines, a toner image formed on a photoreceptor by a known electrophotographic process is transferred onto transfer paper by a transfer device, but at this time, 100% of the toner image on the photoreceptor is transferred onto the transfer paper. Instead of 9 usually 20-40%
A certain amount of toner remains untransferred on the photoreceptor. Therefore, it is necessary to remove the toner remaining on the photoreceptor after transfer so as not to affect the next new process, and a cleaning device is provided for this purpose.
このクリーニング装置としてファーブラシクリーニング
装置が知られている。これはバイアスを印加した回転す
る導電性毛ブラシを感光体表面に摺擦させて感光体上の
残存トナーを取り除くものである。ところが毛ブラシは
絶えず急激な曲げ応力を受け、長時間使用していると脱
毛したり、あるいは切れてしまうという事態が発生し、
この脱毛あるいは切断されたブラシ毛は感光体の回転に
従って下流側に運ばれていき種々の問題を引き起こす。A fur brush cleaning device is known as this cleaning device. In this method, a rotating conductive bristle brush to which a bias is applied is rubbed against the surface of the photoreceptor to remove residual toner on the photoreceptor. However, bristle brushes are constantly subjected to sudden bending stress, and when used for long periods of time, hair brushes may come off or break.
The removed or cut brush hairs are carried downstream as the photoreceptor rotates, causing various problems.
例えば帯電器内のワイヤに付着して異常放電を引き起こ
したり、また現像器内に入り込み部分的な画像欠損を生
じさせたり、あるいは転写紙上に付着して見苦しいコピ
ーを作り、さらには搬送下流側にある定着器の熱ロール
に付着してこれを汚染してしまう等である。しかし毛ブ
ラシの脱毛や切断を皆無にすることは構造上困難であり
。For example, it may adhere to the wires in the charger and cause abnormal discharge, it may enter the developing device and cause partial image defects, it may adhere to the transfer paper and make unsightly copies, and it may also adhere to the downstream side of conveyance. For example, it adheres to the heat roll of a certain fuser and contaminates it. However, it is difficult due to the structure of the bristle brush to completely eliminate hair removal and cutting.
従って脱毛したブラシ毛が搬送されて機内に飛散しない
ようにするための部材が必要となる。従来ファーブラシ
クリーニングにおいてトナー飛散を防止するためマイラ
ーフィルム等を取り付ける方法は広く行われているが、
この効果はトナー飛散を防止するだけであり、マイラー
フィルムを感光体にいくら強（接触させても脱毛したブ
ラシ毛をせき止める効果は全くなく、それどころか逆に
感光体を次第に傷付けてしまう。すなわち従来では脱毛
したブラシ毛の機内への飛散を防止することは出来なか
った。Therefore, a member is required to prevent the removed brush bristles from being transported and scattered inside the machine. Conventionally, when cleaning fur brushes, it has been widely used to attach Mylar film, etc. to prevent toner from scattering.
This effect only prevents toner scattering, and no matter how strongly the Mylar film is brought into contact with the photoconductor, it has no effect at all in blocking the removed brush bristles, and on the contrary, it gradually damages the photoconductor. It was not possible to prevent the removed brush hair from scattering into the cabin.
本発明は上記従来の欠点に鑑み、簡単な構成で脱毛した
ブラシ毛を機内に飛散させないようにした画像形成装置
を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, it is an object of the present invention to provide an image forming apparatus that has a simple structure and prevents removed brush hair from scattering inside the machine.
本発明は上記目的を達成するために、像担持体表面を摺
擦する導電性毛ブラシを有する画像形成装置において、
前記導電性毛ブラシの下流側に前記像担持体表面を摺擦
するスポンジ部材を配置したことを特徴とする。In order to achieve the above object, the present invention provides an image forming apparatus having a conductive bristle brush that rubs the surface of an image carrier.
The present invention is characterized in that a sponge member for rubbing the surface of the image carrier is disposed downstream of the conductive bristle brush.
以下本発明の実施例について図面を参照しながら詳述す
る。Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明の一実施例を示す画像形成装置の構成図
である。FIG. 1 is a block diagram of an image forming apparatus showing an embodiment of the present invention.
像担持体である感光体１は図示する矢印方向に回転可能
に設けられており、この感光体１の周囲には帯電器２．
転写器３．除電ランプ４．クリーニング装置５が順次配
置され、さらに図示しない露光装置、現像器、定着器及
び給紙装置が所定位置に配置されている。A photoreceptor 1 serving as an image carrier is rotatably provided in the direction of the arrow shown in the figure, and a charger 2.
Transfer device 3. Static elimination lamp 4. Cleaning devices 5 are arranged in sequence, and furthermore, an exposure device, a developing device, a fixing device, and a paper feeding device (not shown) are arranged at predetermined positions.
クリーニング装置５はケーシング６及び蓋７よりなるク
リーナ組立体の内部にクリーニングフシ９８１回収ロー
ル１１及びブレード１２がそれぞれの位置関係を保って
配置ずれている。クリーニングブラシ８及び回収ロール
１１は第２図に示すように各々の軸部１６，１７に取り
付けられたギア１ Ｂ、１９が駆動ギア２０と歯合する
ことで回転駆動が与えられる。In the cleaning device 5, a cleaning holder 981, a collection roll 11, and a blade 12 are disposed inside a cleaner assembly consisting of a casing 6 and a lid 7 while maintaining their respective positional relationships. As shown in FIG. 2, the cleaning brush 8 and recovery roll 11 are rotationally driven by gears 1B and 19 attached to respective shaft portions 16 and 17 meshing with a drive gear 20.
クリーニングブラシ８の構成は次のようである。The configuration of the cleaning brush 8 is as follows.
第３図、第４図に示すように、縦糸２１．横糸２２から
なる基布に導電性ブラシ毛１０が束になって織り込まれ
ており、これらは導電性コア９に導電性接着剤層２３を
介して接着され、導電性コア９と導電性ブラシ毛ＩＯと
の間の電気的導通が完全にとれている。ブラシの織り方
としては■織りとＷ織りがあり、第３図に示す■織りは
縦糸２１と横糸２２とで構成された基布に導電性ブラシ
毛１０の束が一箇所だけで緊縛固定されたものであり、
また第４図に示すＷ織りは上記基布に導電性ブラシ毛１
０の束が三箇所で緊縛固定されたものである。導電性ブ
ラシ毛１０の材質としては導電性レーヨン材、特にその
比抵抗が１０７〜１０”Ωｃｒｎの導電性レーヨン材が
望ましく、単糸にて５〜６デニールの太さの糸を２００
〜３００本束ねたものが使用される。ブラシ毛１０の密
度は１５万本／１ｎｃｈ ’〜２２万本／１ｎｃｈ’が
望ましい。また導電性コア９は一般のアルミニウムやス
テンレス等の引き抜きまたは押し出し管、或いは紙管に
適宜導電処理を施したもの等が使用される。回収ロール
１１の材質はアルミニウムやステンレス等であり。As shown in FIGS. 3 and 4, the warp threads 21. Conductive brush bristles 10 are bundled and woven into a base fabric consisting of weft threads 22, and these are adhered to the conductive core 9 via a conductive adhesive layer 23, so that the conductive core 9 and the conductive brush bristles are bonded to each other through a conductive adhesive layer 23. There is complete electrical continuity with IO. Brush weaving methods include ■ weaving and W weaving, and in the ■ weaving shown in Figure 3, a bundle of conductive brush bristles 10 is tied and fixed at only one place on a base fabric made up of warp threads 21 and weft threads 22. It is
In addition, the W weave shown in FIG. 4 has conductive brush hairs 1 on the base fabric.
A bundle of 0 is tied and fixed in three places. The material of the conductive brush bristles 10 is desirably a conductive rayon material, especially a conductive rayon material with a specific resistance of 107 to 10" Ω crn.
A bundle of ~300 pieces is used. The density of the brush bristles 10 is desirably 150,000 bristles/1 nch' to 220,000 bristles/1 nch'. The conductive core 9 may be a general drawn or extruded tube made of aluminum or stainless steel, or a paper tube which has been appropriately conductive treated. The material of the collection roll 11 is aluminum, stainless steel, etc.
またブレード１２はブレードホルダ１３及び１４に挟持
固定され、その先端エツジ部が前記回収ロール１１に圧
接しており、硬度６０°〜８０°のゴム状弾性部材特に
耐摩耗性、耐オゾン性等の観点からウレタンゴムが用い
られる。Further, the blade 12 is clamped and fixed between blade holders 13 and 14, and its tip end portion is in pressure contact with the collection roll 11, and is made of a rubber-like elastic material with a hardness of 60° to 80°, particularly wear resistance, ozone resistance, etc. From this point of view, urethane rubber is used.
なお本実施例では導電性ブラシ毛１０の感光体１及び回
収ロール１１に対する干渉量ｔ！＋、（１２（第５図参
照）はβ＋＝１．０〜２．０ｍ、ｊｌ！シ＝１．０〜１
．５鶴であり、またブラシ毛１０の長さｈ（第３図、第
４図）はｈ＝４〜６１１１である。一方。In this embodiment, the amount of interference of the conductive brush bristles 10 with the photoreceptor 1 and collection roll 11 is t! +, (12 (see Figure 5) is β+=1.0~2.0m, jl!shi=1.0~1
．． 5 cranes, and the length h of the brush bristles 10 (FIGS. 3 and 4) is h=4 to 6111. on the other hand.
クリーニングブラシ８の下流側には感光体１表面を摺擦
するスポンジ部材１５が設けられている。A sponge member 15 that rubs the surface of the photoreceptor 1 is provided downstream of the cleaning brush 8 .
本実施例ではスポンジ部材１５は蓋７に設けられた凹部
に両面接着テープ等によって位置決めされ。In this embodiment, the sponge member 15 is positioned in a recess provided in the lid 7 using double-sided adhesive tape or the like.
さらに帯電器２により挟持されて取り付けられている。Furthermore, it is attached while being clamped by a charger 2.
スポンジ部材１５としては例えば標準セルサイズが４０
個／１ｎｃｈ’以上の発泡スポンジが使用される。For example, the standard cell size of the sponge member 15 is 40.
A foamed sponge of 1 nch' or more is used.
次に以上の構成の画像形成装置の動作について説明する
。Next, the operation of the image forming apparatus having the above configuration will be explained.
感光体重の回転とともに先ず帯電器２により感光体１表
面上に均一帯電が施され９次に原稿の光像が露光されて
静電潜像が形成され、この静電潜像は現像器により現像
されてトナー像となる。この感光体１上に形成されたト
ナー像は転写位置Ａにおいて、給紙装置から給送されて
くる転写紙Ｐ上に転写器３の静電吸引作用により転写さ
れる。As the photoreceptor weight rotates, the surface of the photoreceptor 1 is first uniformly charged by the charger 2, and then an optical image of the original is exposed to form an electrostatic latent image, and this electrostatic latent image is developed by the developer. and becomes a toner image. At a transfer position A, the toner image formed on the photoreceptor 1 is transferred onto a transfer paper P fed from a paper feeding device by the electrostatic attraction action of the transfer device 3.
トナー像が転写された転写紙Ｐは図示しない分離手段に
よって感光体１から分離され、定着器にて画像が定着さ
れる。転写後未転写のまま感光体１上に残留したトナー
は、感光体ｌの図示方向回転に従って除電ランプ４によ
り光照射される。この光照射によって帯電、転写工程で
感光体１上の残留電荷は急激に減少し、感光体１表面と
残留トナーとの静電吸着力は、殆ど消滅し残留トナーは
感光体１から離れ易くなる。The transfer paper P onto which the toner image has been transferred is separated from the photoreceptor 1 by a separating means (not shown), and the image is fixed by a fixing device. The toner remaining untransferred on the photoconductor 1 after the transfer is irradiated with light by the static elimination lamp 4 as the photoconductor 1 rotates in the direction shown. Due to this light irradiation, the residual charge on the photoreceptor 1 during the charging and transfer process is rapidly reduced, and the electrostatic adhesion between the surface of the photoreceptor 1 and the residual toner is almost eliminated, making it easier for the residual toner to separate from the photoreceptor 1. .
次に感光体１はクリーニング位置Ｂに於いて感光体１と
逆方向に回転するクリーニングブラシ８の導電性ブラシ
毛１０と摺擦し感光体１上の残留トナーが清掃されるわ
けであるが、このブラシ毛ｌＯには導電性コア９を通し
て残留トナーとは逆極性のバイアスが印加されている。Next, at the cleaning position B, the photoreceptor 1 rubs against the conductive bristles 10 of the cleaning brush 8 rotating in the opposite direction to the photoreceptor 1, and the residual toner on the photoreceptor 1 is cleaned. A bias having a polarity opposite to that of the residual toner is applied to the brush bristles 1O through the conductive core 9.
このバイアスは略５０〜２００■程度の低バイアス値で
ある。従って感光体１上の残留トナーはブラシ毛１０の
摺擦による物理的な掻き落としとバイアス印加による静
電的吸引力の作用により感光体１上から取り除かれる。This bias is a low bias value of about 50 to 200 square meters. Therefore, the residual toner on the photoreceptor 1 is removed from the photoreceptor 1 by physical scraping by the rubbing of the brush bristles 10 and by the action of electrostatic attractive force by applying a bias.
感光体１からブラシ毛１０に移動した残留トナーはクリ
ーニングブラシ８の図示方向回転に従って回収ロール１
１との接触点まで運ばれる。The residual toner that has moved from the photoconductor 1 to the brush bristles 10 is removed from the collection roll 1 as the cleaning brush 8 rotates in the direction shown in the figure.
It is carried to the point of contact with 1.
回収ロール１１にはブラシ毛１０に印加されているバイ
アスと同極性でかつこれよりも２００〜５００■高いバ
イアス電圧が印加されているので、ブラシ毛１０に保持
された残留トナーは回収ロール１１のバイアスによる静
電吸引力と、ブラシ毛１０と回収ロール１１との間の物
理的摺擦力とにより２回収ロール１１上に移動する。回
収ロール１１上に移動した残留トナーはブレード１２に
よって掻き落とされる。Since a bias voltage of the same polarity as the bias applied to the brush bristles 10 and 200 to 500 mm higher than this is applied to the collection roll 11, the residual toner retained on the brush bristles 10 is transferred to the collection roll 11. It moves onto the second collection roll 11 due to the electrostatic attraction force due to the bias and the physical sliding force between the brush bristles 10 and the collection roll 11. The residual toner that has moved onto the collection roll 11 is scraped off by the blade 12.
上記クリーニング工程では、前述した様にクリーニング
ブラシ８は感光体ｌとの摺擦部において感光体１と逆方
向に摺擦回転しているので導電性ブラシ毛１０は絶えず
急激な曲げ応力を受け、長時間使用されていると導電性
ブラシ毛１０と基布との緊縛力が緩んで脱毛したり、導
電性ブラシ毛１０がその曲がり部分から切れてしまう場
合が生じる。このように脱毛したり、切断された導電性
ブラシ毛１０は感光体１の回転に伴って下流側に運ばれ
てい（が、その下流側に感光体１表面を摺擦するように
設けられたスポンジ部材１５によって完全にせき止めら
れる。従って導電性ブラシ毛１０がクリーニング装置５
外部へ飛散して帯電器２、転写器３等に入り込みトラブ
ルを発生させることはない。In the cleaning process, as described above, since the cleaning brush 8 is slidingly rotating in the opposite direction to the photoreceptor 1 at the rubbing portion with the photoreceptor 1, the conductive bristles 10 are constantly subjected to sudden bending stress. When used for a long period of time, the binding force between the conductive brush bristles 10 and the base fabric may become loose, causing hair loss or the conductive bristles 10 to break off at their bent portions. The conductive brush bristles 10 that have been removed or cut in this way are carried to the downstream side as the photoreceptor 1 rotates. It is completely blocked by the sponge member 15. Therefore, the conductive brush bristles 10 are completely blocked by the cleaning device 5.
It will not scatter to the outside and enter the charger 2, transfer device 3, etc. and cause trouble.
本実施例ではスポンジ部材１５として標準セルサイズが
４０個／ ｉ ｎｃｈ ’以上の発泡スポンジを使用し
ており、これによれば感光体１に強く接触させても感光
体１を全く傷付けずに脱毛したブラシ毛１０の完全なせ
き止め効果が得られるが、スポンジ部材１５の材質とし
ては特にこれに限定されるものではない。 ゛
〔発明の効果〕
以上詳細に説明したように本発明の画像形成装置は簡単
な構成で感光体表面を全く傷付けず脱毛したブラシ毛を
完全にせき止め機内に飛散させないようにしたので、脱
毛したブラシ毛によって画像が影響されることなく安定
した画像を形成することができる。In this embodiment, a foamed sponge with a standard cell size of 40 cells/inch or more is used as the sponge member 15. According to this, even if it comes into strong contact with the photoreceptor 1, hair removal can be performed without damaging the photoreceptor 1 at all. However, the material of the sponge member 15 is not particularly limited to this. [Effects of the Invention] As explained above in detail, the image forming apparatus of the present invention has a simple structure, does not damage the surface of the photoreceptor at all, and completely prevents removed brush bristles from scattering inside the damming machine, so that the image forming apparatus of the present invention can reduce the amount of hair removed. A stable image can be formed without being affected by brush bristles.
第１図は本発明の一実施例を示す構成図、第２図は本発
明の要部斜視図、第３図及び第４図は導電性ブラシ毛の
織り方を示す構成図、第５図は感光体とクリーニングブ
ラシと回収ロールの位置関係を示す構成図である。
１・・・感光体、 ５・・・クリーニング装置、 ８・
・・クリーニングブラシ。
１０・・・導電性ブラシ毛、 １５・・・スポンジ部材
。
特許 出願人 カシオ計算機株式会社
同 上 アイ・ディ株式会社
代理人弁理士 大 菅 義 之Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a perspective view of the main parts of the present invention, Figs. 3 and 4 are block diagrams showing how to weave conductive brush bristles, and Fig. 5. FIG. 2 is a configuration diagram showing the positional relationship between a photoreceptor, a cleaning brush, and a collection roll. 1... Photoreceptor, 5... Cleaning device, 8.
・Cleaning brush. 10... Conductive brush bristles, 15... Sponge member. Patent Applicant: Casio Computer Co., Ltd. Yoshiyuki Osuga, Patent Attorney, ID Co., Ltd.
Claims (2)
る画像形成装置において、前記導電性毛ブラシの下流側
に前記像担持体表面を摺擦するスポンジ部材を配置した
ことを特徴とする画像形成装置。(1) An image forming apparatus having a conductive bristle brush that rubs the surface of the image carrier, characterized in that a sponge member that rubs the surface of the image carrier is disposed downstream of the conductive bristle brush. Image forming device.
１ｎｃｈ’以上の発泡スポンジであることを特徴とする
特許請求の範囲第１項記載の画像形成装置。(2) The standard cell size of the sponge member is 40 pieces/
The image forming apparatus according to claim 1, wherein the image forming apparatus is a foamed sponge of 1 nch' or more.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8715384A JPS60230680A (en) | 1984-04-28 | 1984-04-28 | Image forming device |
| US06/726,980 US4660962A (en) | 1984-04-28 | 1985-04-25 | Cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8715384A JPS60230680A (en) | 1984-04-28 | 1984-04-28 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60230680A true JPS60230680A (en) | 1985-11-16 |
Family
ID=13907034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8715384A Pending JPS60230680A (en) | 1984-04-28 | 1984-04-28 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60230680A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62248030A (en) * | 1985-12-30 | 1987-10-29 | ナ−ムロ−ゼ フエンノ−トチヤツプ フイリツプス グロエイラムペンフアブリ−ケン | Apparatus for distributing display memory between updating process and display process in programmable manner for raster scan video controller |
| JP2014157290A (en) * | 2013-02-15 | 2014-08-28 | Ricoh Co Ltd | Cleaning device, process cartridge, and image forming apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5898769A (en) * | 1981-12-08 | 1983-06-11 | Konishiroku Photo Ind Co Ltd | Cleaning device for copying machine or the like |
-
1984
- 1984-04-28 JP JP8715384A patent/JPS60230680A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5898769A (en) * | 1981-12-08 | 1983-06-11 | Konishiroku Photo Ind Co Ltd | Cleaning device for copying machine or the like |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62248030A (en) * | 1985-12-30 | 1987-10-29 | ナ−ムロ−ゼ フエンノ−トチヤツプ フイリツプス グロエイラムペンフアブリ−ケン | Apparatus for distributing display memory between updating process and display process in programmable manner for raster scan video controller |
| JP2014157290A (en) * | 2013-02-15 | 2014-08-28 | Ricoh Co Ltd | Cleaning device, process cartridge, and image forming apparatus |
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