JPH02129685A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPH02129685A
JPH02129685A JP28235788A JP28235788A JPH02129685A JP H02129685 A JPH02129685 A JP H02129685A JP 28235788 A JP28235788 A JP 28235788A JP 28235788 A JP28235788 A JP 28235788A JP H02129685 A JPH02129685 A JP H02129685A
Authority
JP
Japan
Prior art keywords
image
elastic blade
rotating drum
image forming
toner
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
Application number
JP28235788A
Other languages
Japanese (ja)
Inventor
Nobuhiko Kozuka
小塚 信彦
Shigeo Koyama
小山 茂夫
Eiji Tsutsui
筒井 英二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Priority to JP28235788A priority Critical patent/JPH02129685A/en
Priority to US07/430,339 priority patent/US5028966A/en
Priority to DE68927111T priority patent/DE68927111T2/en
Priority to EP89120900A priority patent/EP0368346B1/en
Priority to EP93112600A priority patent/EP0572048B1/en
Priority to DE68921038T priority patent/DE68921038T2/en
Priority to EP19930112598 priority patent/EP0572047A1/en
Priority to EP19930112601 priority patent/EP0574959A1/en
Priority to EP19930112599 priority patent/EP0570996A1/en
Publication of JPH02129685A publication Critical patent/JPH02129685A/en
Pending legal-status Critical Current

Links

Landscapes

  • Cleaning In Electrography (AREA)

Abstract

PURPOSE:To prevent defective cleaning operation and the damage of a photosensitive body due to foreign matter by turning an image carrying means abutted on an elastic blade in a direction reverse to a prescribed direction before an image forming process is started. CONSTITUTION:The image carrying means 2 abutted on the elastic blade 36 is turned in the reverse direction to the prescribed direction before the image forming process is started. That is, based on a signal sent from an image formation starting switch 54, a reversing signal formed by a control means 50 is continued to be formed until a timer means 56 times a prescribed time and a rotating drum 2 is turned in a direction shown by an arrow 60. Accordingly, the foreign matter between the surface of the rotating drum 2 and the leading edge of the elastic blade 36 is separated from the elastic blade 36, and the leading edge of the elastic blade 36 immediately acts on the surface of the rotating drum 2. Thus, the defective cleaning operation and the occurrence of the damage of the photosensitive body are prevented.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は、画像形成装置、更に詳しくは、像担持手段の
表面をクリーニングする弾性ブレードを備えた画像形成
装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus equipped with an elastic blade for cleaning the surface of an image bearing means.

〔従来技術及びその欠点〕[Prior art and its drawbacks]

一般に、静電複写装置の如き画像形成装置は、回転ドラ
ムの如き像担持手段、像担持手段の表面に形成された静
電潜像を現像する現像装置及びトナー像転写後像担持手
段の表面に残留するトナーを除去するクリーニング装置
を備えている。そして、クリーニング装置として、像担
持手段の表面に作用する弾性ブレードを備えたものが、
比較的構成が簡単である等の理由により広く利用されて
いる。
Generally, an image forming apparatus such as an electrostatic copying apparatus includes an image bearing means such as a rotating drum, a developing device that develops an electrostatic latent image formed on the surface of the image bearing means, and a toner image that is transferred to the surface of the image bearing means after the toner image is transferred. Equipped with a cleaning device to remove residual toner. The cleaning device is equipped with an elastic blade that acts on the surface of the image carrying means.
It is widely used because of its relatively simple configuration.

しかしながら、弾性ブレードを用いた場合には、次の通
りの解決すべき問題がある。即ち、像担持手段の表面を
クリーニングするときには弾性ブレードは像担持手段の
表面に圧接される。かかる圧接状態において、像担持手
段の表面と弾性ブレードの間に異物(例えばトナー像を
転写するシート部材の紙粉等)が介在されるとこの異物
が弾性ブレードの作用によって像担持手段の表面、即ち
感光体表面に圧接される。従って、異物の存在によって
クリーニング不良が発生する恐れがあり、またこの異物
によって感光体を傷つけるおそれがある。
However, when using an elastic blade, there are problems to be solved as follows. That is, when cleaning the surface of the image carrying means, the elastic blade is pressed against the surface of the image carrying means. In such a pressure-contact state, if a foreign object (for example, paper dust from a sheet member to which a toner image is transferred) is interposed between the surface of the image bearing means and the elastic blade, the foreign object will be moved to the surface of the image bearing means by the action of the elastic blade. That is, it is pressed against the surface of the photoreceptor. Therefore, the presence of foreign matter may cause cleaning failures, and the foreign matter may damage the photoreceptor.

〔発明の目的〕[Purpose of the invention]

本発明は上記事実に鑑みてなされたものであり、その主
目的は、異物によるクリーニング不良及び感光体の損傷
を防止することができる画像形成装置を提供することで
ある。
The present invention has been made in view of the above facts, and its main purpose is to provide an image forming apparatus that can prevent cleaning failure and damage to the photoreceptor due to foreign matter.

〔発明の概要〕[Summary of the invention]

本発明によれば、画像形成時に所定方向に移動される像
担持手段と、該像担持手段の表面に形成された画像情報
に対応する静電潜像をトナー像に現像する現像装置と、
該像担持手段の表面に作用しトナー像転写後該像担持手
段の表面に残留するトナーを除去する弾性ブレードを備
えたクリーニング装置と、を具備する画像形成装置にお
いて、画像形成工程の開始前に、該弾性ブレードが該像
担持手段に圧接する状態において、該像担持手段を該所
定方向と反対方向に回動せしめるようにした、ことを特
徴とする画像形成装置が提供される。
According to the present invention, an image carrying means that is moved in a predetermined direction during image formation, a developing device that develops an electrostatic latent image corresponding to image information formed on the surface of the image carrying means into a toner image;
An image forming apparatus comprising: a cleaning device having an elastic blade that acts on the surface of the image bearing means to remove toner remaining on the surface of the image bearing means after toner image transfer; An image forming apparatus is provided, characterized in that, in a state in which the elastic blade is in pressure contact with the image carrying means, the image carrying means is rotated in a direction opposite to the predetermined direction.

〔発明の具体例〕[Specific examples of the invention]

以下、添付図面を参照して更に詳述する。 The present invention will be described in further detail below with reference to the accompanying drawings.

第1図は、静電複写装置の如き画像形成装置の一部を概
略的に示している。第1図において、トナー像が形成さ
れる像担持手段はそれ自体周知の回転ドラム2から構成
されており、回転ドラム20周表面に感光体が配設され
ている。この回転ドラム2の周囲には、矢印3で示す回
転方向に見て順次に、帯電用コロナ放電器4、現像装置
6、転写用コロナ放電器8及びクリーニング装置10が
配設されている。帯電域12に配設された帯電用コロナ
放電器4は、回転ドラム2に向けて特定極性のコロナ放
電を施す。現像域14に配設された現像装置6は、現像
ハウジング16を備えている。
FIG. 1 schematically depicts a portion of an image forming apparatus, such as an electrostatographic reproduction apparatus. In FIG. 1, image bearing means on which a toner image is formed is constituted by a rotary drum 2, which is known per se, and a photoreceptor is disposed on the circumferential surface of the rotary drum 20. As shown in FIG. Around this rotating drum 2, a charging corona discharger 4, a developing device 6, a transfer corona discharger 8, and a cleaning device 10 are arranged sequentially when viewed in the rotational direction indicated by an arrow 3. The charging corona discharger 4 disposed in the charging area 12 applies corona discharge of a specific polarity to the rotating drum 2 . The developing device 6 disposed in the developing area 14 includes a developing housing 16 .

現像ハウジング16の開口部には、矢印1日で示す方向
に回動される円筒状スリーブ20とスリーブ20内に配
設された永久磁石2′2からなる磁気ブラシ機構24が
設けられている。また、現像ハウジング16の開口部に
は薄層形成用のブレード26が設けられ、このブレード
26の先端部がスリーブ200表面に圧接されている。
A magnetic brush mechanism 24 consisting of a cylindrical sleeve 20 that rotates in the direction shown by the arrow 1 and a permanent magnet 2'2 disposed within the sleeve 20 is provided at the opening of the developer housing 16. Further, a blade 26 for forming a thin layer is provided at the opening of the developing housing 16, and the tip of the blade 26 is pressed against the surface of the sleeve 200.

現像ハウジング16内には、更に、その内部に収容され
た現像剤(例えば、磁性トナーのみから構成される)を
攪拌するための攪拌部材28が設けられている。
A stirring member 28 is further provided within the developing housing 16 to stir the developer (for example, composed only of magnetic toner) contained therein.

攪拌部材28は矢印30で示す方向に回動され、かく回
動することによって現像ハウジング16内の現像剤を攪
拌すると共に磁気ブラシ機構24に向けて送給する。か
く送給された現像剤は永久磁石22の作用によってスリ
ーブ20の表面に磁気的に保持され、ブレード26の作
用によって過剰の現像剤が除去された後現像域14にて
回転ドラム2に施される。また、転写域32に配設され
た転写用コロナ放電器8は、トナー像の転写時感光体に
密接された複写紙の如きシート部材の裏面にコロナ放電
を施す。更に、クリーニング域34に配設されたクリー
ニング装置は、感光体に作用する弾性ブレード36を備
えている。例えばウレタンゴムから形成することができ
る弾性ブレード36は支持部材38に固定され、かかる
支持部材38とハウジング40の一部の間には偏倚ばね
42が介在されている。この偏倚ばね42は弾性ブレー
ド36を回転ドラム2に向けて偏倚し、かくして弾性ブ
レード36の先端部は感光体の表面に弾性的に圧接され
る。ハウジング40の下部はトナー回収室44を規定し
、この回収室44内には移送部材46が配設されている
The agitating member 28 is rotated in the direction shown by the arrow 30, and as a result of this rotation, the developer in the developer housing 16 is agitated and fed toward the magnetic brush mechanism 24. The thus-fed developer is magnetically held on the surface of the sleeve 20 by the action of the permanent magnet 22, and after excess developer is removed by the action of the blade 26, it is applied to the rotating drum 2 in the development area 14. Ru. Further, the transfer corona discharge device 8 disposed in the transfer area 32 applies corona discharge to the back surface of a sheet member such as copy paper that is brought into close contact with the photoreceptor during the transfer of the toner image. Furthermore, the cleaning device disposed in the cleaning area 34 includes an elastic blade 36 that acts on the photoreceptor. An elastic blade 36, which may be made of urethane rubber, for example, is fixed to a support member 38, and a biasing spring 42 is interposed between the support member 38 and a portion of the housing 40. The biasing spring 42 biases the elastic blade 36 toward the rotating drum 2, so that the tip of the elastic blade 36 is elastically pressed against the surface of the photoreceptor. The lower portion of the housing 40 defines a toner collection chamber 44 within which a transfer member 46 is disposed.

上述の画像形成装置の作用を概説すると、次の通りであ
る。
The operation of the above-described image forming apparatus is summarized as follows.

回転ドラム2が矢印3で示す方向に回動する間に、帯電
用コロナ放電器4は回転ドラム2の感光体表面を特定極
性に帯電する。次いで、矢印48で示す露光域48にて
、原稿からの反射光が感光体表面の照射され、かくして
感光体の表面に原稿に対応する静電潜像が形成される。
While the rotating drum 2 rotates in the direction indicated by the arrow 3, the charging corona discharger 4 charges the surface of the photoreceptor of the rotating drum 2 to a specific polarity. Next, in an exposure area 48 indicated by an arrow 48, the surface of the photoreceptor is irradiated with light reflected from the original, thus forming an electrostatic latent image corresponding to the original on the surface of the photoreceptor.

次いで、現像域14にて、現像装置6の作用によって現
像剤が感光体に表面に施され、かくして原稿に対応する
トナー像が感光体表面に形成される。しかる後、転写域
32にて、シート部材が回転ドラム2に密接され、転写
用コロナ放電器8の作用によって感光体上のトナー像が
シート部材に転写される。トナー像が転写されたシート
部材は回転ドラム2から剥離された後定着装置(図示せ
ず)に送給され、定着装置にてトナー像がシート部材に
表面に定着される。一方、回転ドラム2は更に回転を続
け、弾性ブレード36の作用によって回転ドラム2上に
残留するトナーが除去される。かく除去されたトナーは
回収室44に回収され、移送部材46の作用によって所
定方向に移送されてトナー回収容器(図示せず)に回収
される。
Next, in the developing area 14, a developer is applied to the surface of the photoreceptor by the action of the developing device 6, thus forming a toner image corresponding to the original on the surface of the photoreceptor. Thereafter, the sheet member is brought into close contact with the rotating drum 2 in the transfer area 32, and the toner image on the photoreceptor is transferred to the sheet member by the action of the transfer corona discharger 8. The sheet member onto which the toner image has been transferred is separated from the rotating drum 2 and then fed to a fixing device (not shown), where the toner image is fixed on the surface of the sheet member. Meanwhile, the rotating drum 2 continues to rotate, and the toner remaining on the rotating drum 2 is removed by the action of the elastic blade 36. The thus removed toner is collected in the collection chamber 44, transferred in a predetermined direction by the action of the transfer member 46, and collected in a toner collection container (not shown).

かかる画像形成装置は、異物等による感光体の損傷を防
止するために、更に、次の通り構成されている。第1図
と共に第2図を参照して、上述の画像形成装置は、例え
ばマイクロプロセッサから構成することができる制御手
段50を備えている。
Such an image forming apparatus is further configured as follows in order to prevent damage to the photoreceptor due to foreign matter or the like. Referring to FIG. 2 together with FIG. 1, the above-described image forming apparatus includes a control means 50 which may be comprised of, for example, a microprocessor.

また、画像形成装置の操作パネル(図示せず)には、装
置本体への電流の供給及び停止を行うためのメインスイ
ッチ52とプリントスイッチの如き画像形成開始スイッ
チ54が設けられており、メインスイッチ52及び画像
形成開始スイッチ54からの信号は制御手段50に供給
される。メインスイッチ52を閉(ON)にすると、装
置本体への電流供給が開始され、またメインスイッチ5
2を開(OFF)にすると、装置本体への電流供給が停
止される。また、メインスイッチ52を閉にした状態に
おいて画像形成開始スイッチ54を閉(ON)にすると
、制御手段50は逆転信号を生成すると共に、制御手段
50におけるタイマ手段56が計時を開始する。そして
、このタイマ手段56が所定時間を計時すると正転信号
を生成する。
Further, the operation panel (not shown) of the image forming apparatus is provided with a main switch 52 for supplying and stopping current to the main body of the apparatus, and an image forming start switch 54 such as a print switch. Signals from the image forming start switch 52 and the image forming start switch 54 are supplied to the control means 50. When the main switch 52 is closed (ON), current supply to the main body of the device is started, and the main switch 52 is closed (ON).
When 2 is opened (OFF), the current supply to the main body of the device is stopped. Further, when the image forming start switch 54 is closed (ON) with the main switch 52 closed, the control means 50 generates a reverse rotation signal, and the timer means 56 in the control means 50 starts measuring time. When the timer means 56 measures a predetermined time, it generates a normal rotation signal.

制御手段50にて生成された逆転信号及び正転信号は、
駆動源として作用する正逆転可能な電動モータ58に供
給される。電動モータ58の出力軸は歯車列(図示せず
)等を介して回転ドラム2のドラム軸に駆動連結されて
おり、制御手段50からの逆転信号に基いて電動モータ
58が逆転されると、回転ドラム2は矢印60(第3図
)で示す方向に回動され、−力制御手段50からの正転
信号に基いて電動モータ58が正転されると、回転ドラ
ム2は矢印3(第1図)で示す方向に回動される。
The reverse rotation signal and the forward rotation signal generated by the control means 50 are as follows:
It is supplied to an electric motor 58 that can be rotated in forward and reverse directions and acts as a drive source. The output shaft of the electric motor 58 is drivingly connected to the drum shaft of the rotating drum 2 via a gear train (not shown) or the like, and when the electric motor 58 is reversed based on a reverse rotation signal from the control means 50, The rotating drum 2 is rotated in the direction shown by the arrow 60 (FIG. 3), and when the electric motor 58 is rotated in the normal direction based on the normal rotation signal from the force control means 50, the rotating drum 2 is rotated in the direction shown by the arrow 3 (FIG. 3). It is rotated in the direction shown in Figure 1).

画像形成開始時の操作について説明すると、画像を形成
する際には、メインスイッチ52を閉にし、しかる後画
像形成開始スイッチ54を閉にする。かくすと、画像形
成開始スイッチ54からの信号に基いて制御手段50が
逆転信号を生成し、かかる逆転信号に基いて電動モータ
58が逆転され、これによって回転ドラム2は矢印60
(第3図)で示す方向に回動される。この逆転信号はタ
イマ手段56が所定時間を計時するまで生成され続け、
逆転信号が生成される間回転ドラム2は矢印60で示す
方向に回動される。回転ドラム2がかく回動されると、
回転ドラム2の表面と弾性ブレード36の先端部の間に
溜っていた異物(シート部材の紙粉、固化したトナー等
)は、第3図に示す如く、回転ドラム2の移動によって
弾性ブレード36から離れる方向に戻され、この弾性ブ
レード36の作用領域から外れ、かくして弾性ブレード
36の先端部が回転ドラム2の表面に直接的に作用する
ようになり、クリーニング不良、感光体の傷の発生が確
実に防止される0回転ドラム2の矢印60で示す方向の
回動量は、回転ドラム2と弾性ブレード36の間に溜っ
ていた異物が弾性ブレード36の作用領域から実質上外
れるまで移動されるに十分な移動量であり、弾性ブレー
ド36の特性、配設部位等によって幾分異なるが、通常
5乃至15閣程度でよい、かかる回動量が小さいと異物
が回転ドラム2と弾性ブレード36の間に挟まれ続け、
異物によるクリーニング不良、感光体の損傷の原因にな
る。一方、かかる回動量が大きいと、第3図から理解さ
れる如く、弾性ブレード36が比較的大きく弾性変形し
て回転ドラム2の表面に強く作用するようになり、弾性
ブレード36の変形等の原因になる。
To explain the operation at the start of image formation, when forming an image, the main switch 52 is closed, and then the image formation start switch 54 is closed. Then, the control means 50 generates a reversal signal based on the signal from the image forming start switch 54, and the electric motor 58 is reversed based on the reversal signal, thereby causing the rotating drum 2 to move in the direction indicated by the arrow 60.
(Fig. 3). This reversal signal continues to be generated until the timer means 56 measures a predetermined time,
While the reversal signal is generated, the rotating drum 2 is rotated in the direction indicated by arrow 60. When the rotating drum 2 is rotated in this way,
As shown in FIG. 3, foreign matter accumulated between the surface of the rotating drum 2 and the tip of the elastic blade 36 (paper dust on the sheet member, solidified toner, etc.) is removed from the elastic blade 36 by the movement of the rotating drum 2. The elastic blade 36 is returned in the direction of separation and is removed from the action area of the elastic blade 36, so that the tip of the elastic blade 36 comes to directly act on the surface of the rotating drum 2, which is sure to cause poor cleaning and scratches on the photoreceptor. The amount of rotation of the zero-rotation drum 2 in the direction indicated by the arrow 60 that is prevented is sufficient to move the foreign matter accumulated between the rotary drum 2 and the elastic blade 36 until it is substantially removed from the action area of the elastic blade 36. The amount of rotation varies somewhat depending on the characteristics of the elastic blade 36, the location of the elastic blade 36, etc., but it is usually around 5 to 15 degrees.If this amount of rotation is small, foreign objects may get caught between the rotating drum 2 and the elastic blade 36. continues,
Foreign matter may cause poor cleaning and damage to the photoreceptor. On the other hand, if the amount of rotation is large, as can be understood from FIG. 3, the elastic blade 36 will undergo a relatively large elastic deformation and will strongly act on the surface of the rotating drum 2, causing deformation of the elastic blade 36. become.

タイマ手段56が所定時間を計時すると、タイマ手段5
6からの信号に基いて制御手段50は正転信号を生成す
る。かくすると、この正転信号に基いて電動モータ58
が正転され、回転ドラム2は上述とは反対に矢印3(第
1図)で示す方向に回動され、かかる回動中に上述した
所定の画像形成工程、即ちシート部材上に原稿に対応し
た画像を形成する動作が遂行される。
When the timer means 56 measures a predetermined time, the timer means 5
Based on the signal from 6, the control means 50 generates a normal rotation signal. Thus, based on this normal rotation signal, the electric motor 58
is rotated in the normal direction, and the rotating drum 2 is rotated in the direction shown by the arrow 3 (FIG. 1) in the opposite direction to that described above. An operation is performed to form the image.

かくの通りの画像形成装置においては、画像形成工程開
始前に回転ドラム2を矢印60で示す方向、即ち画像形
成時の移動方向と反対方向に回動せしめる構成である故
に、回転ドラム2と弾性ブレード36の間に溜った異物
がかかる回転ドラム2の移動により弾性ブレード36の
作用領域から外れ、弾性ブレード36と回転ドラム2間
の部位から効果的に除去される。従って、弾性ブレード
36が回転ドラム20表面に直接的に作用し、異物が原
因となるクリーニング不良、感光体の傷の発生が確実に
防止される。また、回転ドラム2は矢印60で示す方向
に回動された後続いて遂行される画像形成工程時に矢印
60で示す方向と反対の矢印3で示す方向に回動される
故に、画像形成工程前の移動によって生じる弾性ブレー
ド36の弾性変形も画像形成工程時の移動により所要の
通り解消され、弾性ブレード36の変形も防止される。
In the image forming apparatus as described above, since the rotary drum 2 is rotated in the direction shown by the arrow 60 before starting the image forming process, that is, in the opposite direction to the moving direction during image formation, the rotary drum 2 and the elastic Foreign matter accumulated between the blades 36 is removed from the action area of the elastic blade 36 due to the movement of the rotating drum 2, and is effectively removed from the region between the elastic blade 36 and the rotating drum 2. Therefore, the elastic blade 36 acts directly on the surface of the rotating drum 20, thereby reliably preventing poor cleaning and scratches on the photoreceptor caused by foreign matter. Further, since the rotating drum 2 is rotated in the direction shown by the arrow 60 and then rotated in the direction shown by the arrow 3 opposite to the direction shown by the arrow 60 during the subsequent image forming process, the rotating drum 2 is rotated in the direction shown by the arrow 3 opposite to the direction shown by the arrow 60. The elastic deformation of the elastic blade 36 caused by the movement is also eliminated as required by the movement during the image forming process, and deformation of the elastic blade 36 is also prevented.

尚かかる回転ドラム2の矢印60で示す方向の移動は、
連続して画像を形成するときには連続して遂行される画
像形成工程の開始前に一度だけ行うようにしてもよいが
、各々の画像形成工程の開始前に夫々行うようにした方
がクリーニング不良、感光体の傷の発生を一層効果的に
防止することができる。
The movement of the rotating drum 2 in the direction indicated by the arrow 60 is as follows:
When forming images continuously, it may be performed only once before the start of the successive image forming processes, but it is better to perform the process before the start of each image forming process to avoid poor cleaning and It is possible to more effectively prevent the occurrence of scratches on the photoreceptor.

以上、本発明に従う画像形成装置の一具体例について説
明したが、本発明はかかる具体例に限定されるものでは
なく、本発明の範囲を逸脱することなく種々の変形乃至
修正が可能である。
Although a specific example of the image forming apparatus according to the present invention has been described above, the present invention is not limited to this specific example, and various modifications and changes can be made without departing from the scope of the present invention.

例えば、図示の具体例では、弾性ブレードが回転ドラム
に常時圧接される形態のものに適用して説明したが、こ
れに限定されることなく、弾性ブレードが作用位置(弾
性ブレードが回転ドラムに圧接される位置)と非作用位
置(弾性ブレードが回転ドラムに実質上作用しない位置
)に選択的に位置付けられる形態のものにも同様に適用
することができる。かかる場合には、弾性ブレードが上
記作用位置に保持されているときに回転ドラムを画像形
成時の移動方向と反対方向に移動せしめる必要がある。
For example, in the specific example shown in the drawings, the elastic blade is always pressed against the rotating drum. The same applies to a configuration in which the elastic blade is selectively positioned in a non-active position (a position where the elastic blade does not substantially act on the rotating drum) and a non-active position (a position in which the elastic blade does not substantially act on the rotating drum). In such a case, it is necessary to move the rotary drum in a direction opposite to the direction of movement during image formation while the elastic blade is held in the operating position.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、本発明に従う画像形成装置の一部を簡略的に
示す断面図。 第2図は、第1図の画像形成装置の制御系の一部を示す
簡略図。 第3図は、第1図の画像形成装置において回転ドラムを
画像形成時の移動方向と反対方向に移動せしめた状態を
示す部分簡略断面図。 2・・・回転ドラム 6・・・現像装置 10・・・クリーニング装置 36・・・弾性ブレード 50・・・制御手段 54・・・画像形成開始スイッチ 58・・・電動モータ
FIG. 1 is a cross-sectional view schematically showing a part of an image forming apparatus according to the present invention. FIG. 2 is a simplified diagram showing a part of the control system of the image forming apparatus shown in FIG. FIG. 3 is a partially simplified sectional view showing the image forming apparatus of FIG. 1 in which the rotating drum is moved in a direction opposite to the moving direction during image formation. 2...Rotating drum 6...Developing device 10...Cleaning device 36...Elastic blade 50...Control means 54...Image formation start switch 58...Electric motor

Claims (1)

【特許請求の範囲】[Claims] 1、画像形成時に所定方向に移動される像担持手段と、
該像担持手段の表面に形成された画像情報に対応する静
電潜像をトナー像に現像する現像装置と、該像担持手段
の表面に作用しトナー像転写後該像担持手段の表面に残
留するトナーを除去する弾性ブレードを備えたクリーニ
ング装置と、を具備する画像形成装置において、画像形
成工程の開始前に、該弾性ブレードが該像担持手段に圧
接する状態において、該像担持手段を該所定方向と反対
方向に回動せしめるようにした、ことを特徴とする画像
形成装置。
1. An image carrying means that is moved in a predetermined direction during image formation;
a developing device that develops an electrostatic latent image corresponding to the image information formed on the surface of the image bearing means into a toner image; and a developing device that acts on the surface of the image bearing means and remains on the surface of the image bearing means after the toner image is transferred. and a cleaning device equipped with an elastic blade for removing toner, the image forming apparatus is equipped with a cleaning device having an elastic blade that removes toner. An image forming apparatus characterized in that it can be rotated in a direction opposite to a predetermined direction.
JP28235788A 1988-11-10 1988-11-10 Image forming device Pending JPH02129685A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP28235788A JPH02129685A (en) 1988-11-10 1988-11-10 Image forming device
US07/430,339 US5028966A (en) 1988-11-10 1989-11-02 Image-forming machine
DE68927111T DE68927111T2 (en) 1988-11-10 1989-11-10 Imaging device
EP89120900A EP0368346B1 (en) 1988-11-10 1989-11-10 Image-forming machine
EP93112600A EP0572048B1 (en) 1988-11-10 1989-11-10 Image-forming machine
DE68921038T DE68921038T2 (en) 1988-11-10 1989-11-10 Imaging device.
EP19930112598 EP0572047A1 (en) 1988-11-10 1989-11-10 Image-forming machine
EP19930112601 EP0574959A1 (en) 1988-11-10 1989-11-10 Image-forming machine
EP19930112599 EP0570996A1 (en) 1988-11-10 1989-11-10 Image-forming machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28235788A JPH02129685A (en) 1988-11-10 1988-11-10 Image forming device

Publications (1)

Publication Number Publication Date
JPH02129685A true JPH02129685A (en) 1990-05-17

Family

ID=17651355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28235788A Pending JPH02129685A (en) 1988-11-10 1988-11-10 Image forming device

Country Status (1)

Country Link
JP (1) JPH02129685A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5538554A (en) * 1978-09-12 1980-03-18 Copyer Co Ltd Method and apparatus for prevention of entangling of cleaning blade
JPS6230282A (en) * 1985-07-31 1987-02-09 Toshiba Corp Electronic copying machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5538554A (en) * 1978-09-12 1980-03-18 Copyer Co Ltd Method and apparatus for prevention of entangling of cleaning blade
JPS6230282A (en) * 1985-07-31 1987-02-09 Toshiba Corp Electronic copying machine

Similar Documents

Publication Publication Date Title
JPH0690556B2 (en) Electrophotographic recording device
JPH02129685A (en) Image forming device
JP3247833B2 (en) Transfer device
JPH0683166A (en) Electrostatic charging device
JP3434412B2 (en) Image forming device
US5548377A (en) Method of controlling an image forming apparatus when an emergency stop signal is generated
JPH0764445A (en) Electrophotographic device
JP2791785B2 (en) Image forming device
JPH086454A (en) Electrophotographic device
JP3653936B2 (en) Image forming apparatus
JP2721715B2 (en) How to clean the cleaning blade
JP3062146B2 (en) Dispersion member for dispersion step in image forming method
JPS608886A (en) Cleaning device for photosensitive drum surface of electrophotographic copying machine
JPS61141475A (en) Image forming device
JPH05188830A (en) Image forming device
JPH09230769A (en) Image forming device
JPH04274476A (en) Cleaning method for image forming device
JP3334839B2 (en) Image forming device
JPH117209A (en) Image forming device
JPH09197932A (en) Image forming device
JPH09297515A (en) Image forming device
JPH02141786A (en) Cleaning mechanism
JPH10213968A (en) Image forming device
JPH0572878A (en) Electrophotographic device
JPH09244508A (en) Image forming device