JPH02264975A - Image forming device - Google Patents

Abstract

PURPOSE:To maintain an electrifying device clean and also to facilitate providing a transfer carrying means including a transferring means in the upper side of an image forming means by providing a wire cleaning means in the electrifying device and a chamber part in a specified position of a casing for electrifying device. CONSTITUTION:The device is constituted providing a wire cleaning means 22 which scrapes off toner adhered to a discharging wire 6a, etc., in the electrifying device 6 and also providing the chamber hole 6c where the toner scraped off by the means 2 from the wire 6a is dropped outside the electrifying device in the lower side plate of the casing for an electrifying device 6b. Thus the means 22 is traveled back and forth in the right and left direction shown in the diagram by a driving wire 23 which is connected to the traveled part 22a dropping the adhered toner of the wire 6 to a receiving plate 24, and the electrifying device 6 is easily maintained clean. Further, with a free toner recovering means consisted from a toner capturing electrode 25 and a cleaning guiding means 26, there is little toner adhering even when the electrifying device 6 is in a lower direction of the cleaning device 5, toner capturing is carried out efficiently with the intervening of a cover 27, and the toner is dropped to the receiving plate 24 surely.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、電子写真複写機等の画像形成装置に関し、詳
しくは、回転する像形成体の周囲にクリーング装置、帯
電器、像露光装置、現像装置、転写手段を含む転写紙搬
送手段を配設して、像形成体面に形成したトナー像を転
写紙に転写する画像形成装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus such as an electrophotographic copying machine, and more specifically, a cleaning device, a charger, an image exposure device, The present invention relates to an image forming apparatus that is provided with a transfer paper conveying means including a developing device and a transfer means, and transfers a toner image formed on the surface of an image forming body onto a transfer paper.

〔従来の技術〕[Conventional technology]

従来の上述のような画像形成装置は、転写手段を含む転
写紙搬送手段が像形成体の下側に位置し、したがって現
像装置が像形成体の横向き面と対向し、像露光装置が像
形成体の斜め上向き面乃至は上向き面に像露光を入射し
、帯電器が像形成体の上向き面乃至は斜め上向き面と対
向し、クリーニング装置が像形成体の現像装置とは反対
側の横向き面と対向するようなものであった。そして、
帯電器に放電ワイヤ表面を摺擦して放電ワイヤに付着し
たトナーを脱落させる清掃手段を備えた画像形成装置も
ある。このような画像形成装置においては、帯電器の清
掃手段で清掃を行うと、放電ワイヤ等から離脱したトナ
ーが像形成体上に落下するようになり、そのために他の
部分が汚れ易いと貫う問題があった。In the conventional image forming apparatus as described above, the transfer paper conveying means including the transfer means is located below the image forming body, the developing device faces the lateral surface of the image forming body, and the image exposure device faces the side surface of the image forming body. Image exposure is applied to the obliquely upward or upwardly facing surface of the image forming body, the charger is opposed to the upwardly facing or obliquely upwardly facing surface of the image forming body, and the cleaning device is applied to the lateral side of the image forming body opposite to the developing device. It was like confronting. and,
Some image forming apparatuses include a charger equipped with a cleaning device that rubs the surface of the discharge wire to remove toner attached to the discharge wire. In such an image forming apparatus, when cleaning is performed using the cleaning means of the charger, toner separated from the discharge wire, etc., falls onto the image forming body, which tends to stain other parts. There was a problem.

また、転写手段を含む転写紙搬送手段が像形成体の下側
にある画像形成装置では、像形成体から脱落するトナー
によって転写手段や転写紙が汚れ易いと言う問題もある
。Further, in an image forming apparatus in which a transfer paper transport means including a transfer means is located below the image forming body, there is a problem in that the transfer means and the transfer paper are easily smeared by toner falling off from the image forming body.

画像形成装置が像形成体面に複数のトナー像の重ね合わ
せから成るカラー画像を形成するものである場合は、像
形成体のトナー像付着面が帯電器や転写手段の位置を通
過するようになるから、上述の問題が一層顕著になる。When the image forming device forms a color image consisting of a plurality of superimposed toner images on the image forming body surface, the toner image attachment surface of the image forming body passes through the position of the charger or transfer means. As a result, the above-mentioned problems become even more pronounced.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明は、上述の問題の解消を目的としてなされたもの
であり、清掃手段によって帯電器を清浄に保つことが容
易にでき、しかもそのために他の部分を汚す惧れが少な
くて、転写手段を含む転写紙搬送手段を像形成体の上側
に設けることが容易にできる画像形成装置の提供を目的
とする。The present invention has been made with the aim of solving the above-mentioned problems, and it is possible to easily keep the charger clean by a cleaning means, and to do so, there is less risk of contaminating other parts, and the transfer means can be kept clean. An object of the present invention is to provide an image forming apparatus in which a transfer paper conveying means including a transfer paper conveying means can be easily provided above an image forming body.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は、回転する像形成体の周囲にクリーニング装置
、帯電器、像露光装置、現像装置、転写手段を含む転写
紙搬送手段を配設して、像形成体面に形成したトナー像
を転写紙に転写する画像形成装置において、帯電器が放
電ワイヤに付着しＩ；トナーを脱落させるワイヤ清掃手
段を備えて、像形成体の横向き乃至は下向き面と対向し
て配設され、ケーシングの放電ワイヤから鉛直下方に当
たる部分を放電ワイヤからの脱落トナーが帯電器外に落
下し得るように切り欠かれていることを特徴とする画像
形成装置にあり、この構成によって前記目的を達成する
。In the present invention, a transfer paper conveying means including a cleaning device, a charger, an image exposure device, a developing device, and a transfer means is arranged around a rotating image forming body, and the toner image formed on the surface of the image forming body is transferred to the transfer paper. In an image forming apparatus for transferring toner, a charger is provided with a wire cleaning means for removing toner that adheres to the discharge wire, and is disposed facing the sideways or downward surface of the image forming body, The image forming apparatus is characterized in that a portion vertically downward from the discharge wire is cut out so that toner falling off from the discharge wire can fall outside the charger, and this configuration achieves the above object.

〔作用〕[Effect]

すなわち、本発明の画像形成装置は、放電ワイヤ清掃手
段を備えた帯電器が像形成体の横向き乃至は下向き面と
対向して、ケーシングの放電ワイヤから鉛直下方に当た
る部分を放電ワイヤからの脱落トナーが帯電器外に落下
し得るように切り欠かれているから、清掃手段で放電ワ
イヤのトナーを脱落させると脱落したトナーはケーシン
グの切り欠きを通って帯電器外に出て像形成体上に落ち
ることがないと言ったように、容易に帯電器を清浄に保
って他の部分を汚さないようにできるし、転写手段を含
む転写紙搬送手段を像形成体の上側に設けることも容易
にできる。That is, in the image forming apparatus of the present invention, the charger equipped with the discharge wire cleaning means faces the sideways or downward facing surface of the image forming body, and cleans the portion of the casing that is vertically downward from the discharge wire to remove toner that has fallen from the discharge wire. Since the toner is cut out so that it can fall out of the charger, when the toner is removed from the discharge wire by the cleaning means, the toner that falls out passes through the cutout in the casing and falls onto the image forming body. As mentioned above, it is easy to keep the charger clean so that other parts are not contaminated, and it is also easy to provide the transfer paper conveyance means including the transfer means above the image forming body. can.

（実施例〕 以下、本発明を図示例によって説明する。(Example〕 The present invention will be explained below using illustrated examples.

第１図は本発明画像形成装置の１例を示す概要断面図、
第２図は帯電器周辺部を示す部分図である。この装置に
おける画像形成は以下のように行われる。FIG. 1 is a schematic sectional view showing one example of the image forming apparatus of the present invention;
FIG. 2 is a partial view showing the surrounding area of the charger. Image formation in this apparatus is performed as follows.

転写搬送ベルトｌが２点鎖線で示した状態すなわち、張
設状態切換ローラ２が２点鎖線位置に変位し、それに伴
ってテンションローラ３が２点鎖線位置に変位して、転
写搬送ベルトｌが像形成体４から離れている状態が始動
前の状態である。この状態で不図示のスタート釦を押す
と、像形・成体４が矢印方向に回転を開始し、クリーニ
ング装置５が像形成体４の面をクリーニングして、その
クリーニング面をスコロトロンコロナ放電器を用いた帯
電器６が一様に帯電する。その−様帯電面にレーザビー
ムスキャナから成る像露光装置７が分解色の例えばイエ
ロー（Ｙ）像についての像露光全入射してドツト構成の
静電像を形成する。この静電像をＹトナーを現像剤に用
いている現像装置８が像形成体４に非接触の現像ローラ
からＹトナーを飛翔させてＹトナー像に現像する。その
Ｙトナー像形成面が不作動状態に置かれている他の現像
装置９〜１１の位置や既に不作動状態となったクリーン
グ装置５の位置を通過して帯電器６の位置に適すると帯
電器６によって再び一様に帯電される。この−様帯電面
に像露光装置７が今度は分解色の例えばマゼンタＣＭ）
像についての像露光を入射してドツト構成の静電像を形
成する。この静電像をＭトナーを現像剤に用いている現
像装置９によって前と同様に現像する。それによって像
形成体４にＹトナー像とＭトナー像の重ね合わせから成
る２色像が形成される。この２色像形成面が前と同様に
帯電器６の位置に達すると、帯電１）６によって再び一
様に帯電される。この−様帯電面に像露光装置７が今度
はシアン（Ｃ）像についての像露光を入射して静電像を
形成する。この静電像をＣトナーを現像剤に用いている
現像装置ｌＯがＣトナー像に現像する。それによって像
形成体４にＹ。The transfer conveyance belt l is in the state shown by the two-dot chain line, that is, the tension state switching roller 2 is displaced to the two-dot chain line position, the tension roller 3 is accordingly displaced to the two-dot chain line position, and the transfer conveyance belt l is in the state shown by the two-dot chain line. The state where it is away from the image forming body 4 is the state before starting. When a start button (not shown) is pressed in this state, the image forming body 4 starts rotating in the direction of the arrow, the cleaning device 5 cleans the surface of the image forming body 4, and the cleaning surface is transferred to the scorotron corona discharger. The charger 6 using the electrifier 6 is uniformly charged. An image exposure device 7 consisting of a laser beam scanner makes the entire image exposure of a separated color, for example, a yellow (Y) image, incident on the --like charged surface to form an electrostatic image in the form of dots. A developing device 8 using Y toner as a developer develops this electrostatic image into a Y toner image by ejecting the Y toner from a developing roller that does not contact the image forming body 4. When the Y toner image forming surface passes through the positions of the other developing devices 9 to 11 that are inactive or the cleaning device 5 that is already inactive, it is charged when it reaches the position of the charger 6. It is uniformly charged again by the device 6. The image exposure device 7 then applies a separated color (for example, magenta CM) to this --like charged surface.
An electrostatic image having a dot structure is formed by applying imagewise exposure to the image. This electrostatic image is developed in the same way as before by the developing device 9 using M toner as a developer. As a result, a two-color image consisting of a Y toner image and a M toner image superimposed is formed on the image forming body 4. When this two-color image forming surface reaches the position of the charger 6 as before, it is uniformly charged again by the charger 1) 6. The image exposure device 7 then injects image exposure light for a cyan (C) image onto this --like charged surface to form an electrostatic image. A developing device IO using C toner as a developer develops this electrostatic image into a C toner image. As a result, the image forming member 4 is Y.

Ｍ、Ｃ）ナー像の重ね合わせから成る３色カラー画像が
形成される。陰影や輪郭のはつきりしたカラー画像を形
成する場合はさらに、上述の３色カラー画像形成面を帯
電器６で一様に帯電し、その帯電面に像露光装置７によ
って陰影像についての像露光を入射して静電像を形成し
、その静電像を黒（ＢＫ））ナーを現像剤に用いている
現像装置１１によってＢＫＩ−ナー像に現像する。それ
によって像形成体４上にＹ、Ｍ、Ｃ，ＢＫトナー像の重
ね合わせから成る陰影や輪郭のはっきりした４色カラー
画像が形成される。M, C) A three-color image consisting of a superposition of color images is formed. When forming a color image with sharp shadows and outlines, the above-mentioned three-color image forming surface is uniformly charged with a charger 6, and an image of a shadow image is formed on the charged surface with an image exposure device 7. Exposure is applied to form an electrostatic image, and the electrostatic image is developed into a BKI-toner image by a developing device 11 using black (BK) toner as a developer. As a result, a four-color image with clear shadows and outlines is formed on the image forming body 4 by overlapping Y, M, C, and BK toner images.

一方、予め記録媒体Ｐが給紙トレイ１２から給紙ローラ
１３により送り出されるか、または手差し口１４から入
口ローラ１５により送り込まれるかしてレジスタローラ
１６の位置に到達させられており、像形成体４に形成さ
れた前記３色カラー画像または４色カラー画像の先端が
転写部に達するときには記録媒体Ｐの先端も転写部を過
ぎているタイミングで、記録媒体Ｐはレジスタローラ１
６により像形成体４０表表面皮と同じ速度で像形成体４
へと送り込まれる。また転写搬送ベルトｌは、記録媒体
Ｐの先端が転写部に達する前に像Ｍｔ、体４の表面速度
と同じ速度で矢印方向の回動を開始し、像形成体４のカ
ラー画像先端よりも先にあるブランク面が転写部を通過
している間に、張設状態切換ローラ２が２点鎖線位置か
ら実線位置に変位し、それに伴ってテンションローラ３
が２点鎖線位置から実線位置に変位することにより、実
線で示したように像形成体４と圧接し合う状態になる。On the other hand, in advance, the recording medium P is sent out from the paper feed tray 12 by the paper feed roller 13 or fed from the manual feed port 14 by the entrance roller 15 to reach the position of the register roller 16. When the leading edge of the 3-color image or 4-color image formed on 4 reaches the transfer part, the leading edge of the recording medium P has also passed the transfer part, and the recording medium P is moved to the register roller 1.
6, the image forming member 4 is moved at the same speed as the surface skin of the image forming member 40.
sent to. Furthermore, before the leading edge of the recording medium P reaches the transfer section, the transfer conveyance belt l starts rotating in the direction of the arrow at the same speed as the surface speed of the image Mt, body 4, and is faster than the leading edge of the color image on the image forming body 4. While the blank surface ahead is passing through the transfer section, the tension state switching roller 2 is displaced from the two-dot chain line position to the solid line position, and the tension roller 3 is accordingly displaced from the two-dot chain line position to the solid line position.
is displaced from the position shown by the two-dot chain line to the position shown by the solid line, thereby coming into pressure contact with the image forming member 4 as shown by the solid line.

それと共に転写器１７が作動を開始する。なお、転写器
１７は、転写搬送ベル）ｌが像形成体４と圧接し合う状
態となったときに転写搬送ベルトｌと近接しているよう
に、張設状態切換ローラ２の変位と連動して変位する部
材に設けられている。At the same time, the transfer device 17 starts operating. The transfer device 17 is linked to the displacement of the tension state switching roller 2 so that the transfer conveyance belt 1 is in close proximity to the transfer conveyance belt 1 when the transfer conveyance belt 1 is in pressure contact with the image forming body 4. It is provided on the member that is displaced by the movement.

以上によって、転写器１７が転写搬送ベルトｌを介して
像形成体４に接近している転写部において、記録媒体Ｐ
に像形成体４のカラー画像が転写される。カラー画像を
転写された記録媒体Ｐは、クーロン力で転写搬送ベルト
ｌに吸着されて運ばれ、転写搬送ベルトｌが小径張設ロ
ーラ１８に沿って反転するときに曲げ剛さによって追従
できずに分離して直進し、定着装置１９に入る。そして
記録媒体Ｐは、定着装置１９でカラー画像を定着され、
排出ローラ２０によって排紙トレイ２１上に排出される
。As described above, in the transfer section where the transfer device 17 approaches the image forming body 4 via the transfer conveyance belt l, the recording medium P
The color image on the image forming body 4 is transferred to. The recording medium P on which the color image has been transferred is attracted to the transfer conveyance belt l by Coulomb force and is conveyed, and when the transfer conveyance belt l reverses along the small diameter tensioning roller 18, it cannot follow the recording medium P due to its bending stiffness. It separates, goes straight, and enters the fixing device 19. Then, the color image is fixed on the recording medium P by the fixing device 19,
The paper is discharged onto a paper discharge tray 21 by a discharge roller 20 .

カラー画像を転写された記録媒体Ｐの後端が転写部を通
過し了える直前に、転写搬送ベルト１は張設状態切換ロ
ーラ２により２点鎖線で示した状態に像形成体４から離
れ、その際転写器１７の作動停止が行われ、そして記録
媒体Ｐの後端が定着装置１９に入り込むようになるとき
に、転写微差ベルトｌは回動を停止する。カラー画像を
転写した像形成体４の表面は再び作動状態となったクリ
ーニング装置によってクリーニングされ、次のカラー画
像形成を続けて行う場合はそのクリーニング面に前と同
様にカラー画像形成工程が繰返されるが、そうでない場
合は像形成体４の全周のクリーニングが終了した後にお
いて像形成体４の停止とともに全装置の停止が行われて
、次にまたスタート釦が押されるのを待つことになる。Immediately before the rear end of the recording medium P to which the color image has been transferred passes through the transfer section, the transfer conveyance belt 1 is separated from the image forming body 4 by the tension state switching roller 2 to the state shown by the two-dot chain line. At this time, the operation of the transfer device 17 is stopped, and when the rear end of the recording medium P enters the fixing device 19, the transfer fine difference belt l stops rotating. The surface of the image forming body 4 on which the color image has been transferred is cleaned by the cleaning device which is activated again, and when the next color image is to be formed continuously, the color image forming process is repeated on the cleaned surface in the same manner as before. However, if this is not the case, after the cleaning of the entire circumference of the image forming body 4 is completed, the image forming body 4 is stopped and the entire apparatus is also stopped, and then the user waits for the start button to be pressed again. .

以上のようにカラー画像を形成する図示例の装置セ単色
画像を形成することも勿論できる。その場合は、クリー
ニング装置５でクリーニングされた像形成体４の面を帯
電器６が一様に帯電し、その帯電面に像露光装置７が例
えば白黒画像についての像露光を入射し、それによって
形成された静電像を現像装置１１がＢＫ）ナー像に現像
し、そのトナー像が記録媒体Ｐに転写されて定着される
と言った１合に行われ、転写搬送ベルト１を最初から像
形成体４に接触させて回動させても、クリーニング装置
５を最初から最後まで作動状態にしたままでもよい。It goes without saying that the illustrated apparatus for forming a color image as described above can also form a monochromatic image. In that case, the charger 6 uniformly charges the surface of the image forming body 4 that has been cleaned by the cleaning device 5, and the image exposure device 7 applies image exposure for, for example, a black and white image to the charged surface. The developing device 11 develops the formed electrostatic image into a BK toner image, and the toner image is transferred to the recording medium P and fixed. Even if it is brought into contact with the forming body 4 and rotated, the cleaning device 5 may remain in the operating state from beginning to end.

単色画像を形成する場合は、帯電器６は常に像形成体４
のクリーニングされた面を帯電するが、それでも画像形
成が繰り返されると帯電器６は放電ワイヤ６ａ等にトナ
ーが付着して汚れるようになる。ましてや、前述のよう
にカラー画像を形成する場合は、帯電器６は像形成体４
のトナー像を形成されている面にも帯電を行うから、−
層放電ワイヤ６ａ等にトナーが付着して汚れ易い。When forming a monochrome image, the charger 6 is always connected to the image forming body 4.
However, if image formation is repeated, the charger 6 becomes dirty due to toner adhering to the discharge wire 6a and the like. Furthermore, when forming a color image as described above, the charger 6 is connected to the image forming body 4.
Since the surface on which the toner image of is also formed is charged, -
Toner adheres to the layer discharge wire 6a and the like and tends to stain it.

そこで、図示例のカラー画像形成装置は、帯電器６に放
電ワイヤ６８等に付着したトナーを掻き落とすワイヤ清
掃手段２２を設けると共に、帯電器６のケーシング６ｂ
の下側板に放電ワイヤ６ａから清掃手段２２により掻き
落とされたトナーが帯電器６外に落下し得るような切り
欠き孔６Ｃを設けている。そして切り欠き孔６．ｃの下
方には落下して来たトナーを受ける受け皿２４も配置し
ている。Therefore, in the illustrated color image forming apparatus, the charger 6 is provided with a wire cleaning means 22 for scraping off the toner adhering to the discharge wire 68, etc.
A cutout hole 6C is provided in the lower plate of the charger 6 so that the toner scraped off by the cleaning means 22 from the discharge wire 6a can fall to the outside of the charger 6. and notch hole 6. A receiving tray 24 for receiving the falling toner is also arranged below c.

これによって、帯電器６の放電ワイヤ６ａにトナーが付
着したら、清掃手段２２をその被動部２２ａに接続した
駆動用ワイヤ２３で紙面と直角の方向に往復動させるこ
とにより放電ワイヤ６ａに付着しているトナーを帯電器
６外の受け皿２４に落とすことができ、帯電器６を容易
に清浄に保つことができる。As a result, when toner adheres to the discharge wire 6a of the charger 6, the cleaning means 22 is moved back and forth in the direction perpendicular to the plane of the drawing using the drive wire 23 connected to the driven portion 22a of the cleaning means 22, thereby removing the toner from the discharge wire 6a. The toner contained therein can be dropped into the tray 24 outside the charger 6, and the charger 6 can be easily kept clean.

また図示例の画像形成装置は、クリーニング装置５と帯
電器６の間に像形成体４０面と対向してトナーの帯電と
は逆極性の電圧を印加されて矢印方向に回転するトナー
捕捉電極２５と、該電極２５に接して該電極２５が捕捉
したトナーを掻き取って案内し受け皿２４に落下させる
清掃案内手段２６とから成る遊離トナー回収手段および
遊離トナー回収手段の外側を覆うようなカバー２７を設
けている。このうち、遊離トナー回収手段を設けたこと
によって、帯電器６がクリーニング装置５の下方に位置
していてもトナーの付着で汚れることが少なくなり、カ
バー２７を設けたことによって、トナー捕捉電極２５に
よる遊離トナーの捕捉が効率的に行われるようになると
共に、清掃案内手段２６で案内されたトナーが確実に受
け皿２４中に落下するようになる。Further, in the illustrated image forming apparatus, a toner capturing electrode 25 is provided between the cleaning device 5 and the charger 6, facing the surface of the image forming body 40, and rotating in the direction of the arrow by applying a voltage of opposite polarity to the charging of the toner. and a cleaning guide means 26 that is in contact with the electrode 25 and scrapes and guides the toner captured by the electrode 25 and drops it into the receiving tray 24, and a cover 27 that covers the outside of the free toner collection means. has been established. Among these, by providing the free toner collecting means, even if the charger 6 is located below the cleaning device 5, it is less likely to be contaminated by toner adhesion, and by providing the cover 27, the toner trapping electrode 25 The free toner is efficiently captured by the cleaning guide means 26, and the toner guided by the cleaning guide means 26 is ensured to fall into the tray 24.

〔発明の効果〕〔Effect of the invention〕

本発明の画像形成装置においては、清掃手段によって帯
電器を清浄に保つことが容易にでき、そのために他の部
分を汚す惧れが少なくて、さらに転写手段を含む転写紙
搬送手段を像形成体の上側に設けることが容易にできる
と言う効果が得られる。なお、本発明は、カラー画像形
成装置に限らず、単色画像゛形成装置にも適用できる。In the image forming apparatus of the present invention, the charging device can be easily kept clean by the cleaning means, so there is less risk of contaminating other parts, and furthermore, the transfer paper conveying means including the transfer means can be easily kept clean by the cleaning means. The effect is that it can be easily provided on the upper side. Note that the present invention is applicable not only to color image forming apparatuses but also to monochrome image forming apparatuses.

また、本発明の画像形成装置は、原稿読取装置も備えて
複写機として用いられるものであってもよいことは言う
までもない。It goes without saying that the image forming apparatus of the present invention may also be equipped with a document reading device and used as a copying machine.

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

第１図は本発明画像形成装置の１例を示す概要断面図、
第２図は帯電器周辺部を示す部分図である。 ｌ・・・転写搬送ベルト　　２・・・張設状態切換ロー
ラ３・・・テンションローラ　４・・・像形成体５・・
・クリーニング装置 ６ａ・・・放電ワイヤ ６ｃ・・・切り欠き孔 ８〜１１・・・現像装置 １４・・・手差し口 １７・・・転写器 ２１・・・排紙トレイ ２２ａ・・・被動部 ２４・・・受け皿 ２６・・・清掃案内手段FIG. 1 is a schematic sectional view showing one example of the image forming apparatus of the present invention;
FIG. 2 is a partial view showing the surrounding area of the charger. l...Transfer conveyance belt 2...Tension state switching roller 3...Tension roller 4...Image forming body 5...
・Cleaning device 6a...Discharge wire 6c...Notch holes 8 to 11...Developing device 14...Manual feed port 17...Transfer device 21...Sheet discharge tray 22a...Driver part 24 ... saucer 26 ... cleaning guide means

Claims (4)

【特許請求の範囲】[Claims] （１）回転する像形成体の周囲にクリーニング装置、帯
電器、像露光装置、現像装置、転写手段を含む転写紙搬
送手段を配設して、像形成体面に形成したトナー像を転
写紙に転写する画像形成装置において、帯電器が放電ワ
イヤに付着したトナーを脱落させるワイヤ清掃手段を備
えて、像形成体の横向き乃至は下向き面と対向して配設
され、ケーシングの放電ワイヤから鉛直下方に当たる部
分を放電ワイヤからの脱落トナーが帯電器外に落下し得
るように切り欠かれていることを特徴とする画像形成装
置。(1) A transfer paper conveying means including a cleaning device, a charger, an image exposure device, a developing device, and a transfer means is arranged around the rotating image forming body, and the toner image formed on the surface of the image forming body is transferred to the transfer paper. In an image forming apparatus for transferring, a charger is provided with a wire cleaning means for removing toner adhering to a discharge wire, is disposed facing the sideways or downward surface of the image forming body, and is disposed vertically downward from the discharge wire of the casing. An image forming apparatus characterized in that a portion corresponding to the discharge wire is cut out so that toner falling off from the discharge wire can fall to the outside of the charger. （２）帯電器外に放電ワイヤからの脱落トナーの受け皿
がある特許請求の範囲第１項記載の画像形成装置。(2) The image forming apparatus according to claim 1, further comprising a receptacle for toner falling off from the discharge wire outside the charger. （３）帯電器が像形成体の横向き面と対向し、帯電器の
上方にクリーニング装置があって、クリーニング装置と
帯電器の間に像形成体面と対向してトナー捕捉電極と該
電極の清掃手段とを備えた遊離トナー回収手段が設けら
れている特許請求の範囲第１項記載の画像形成装置。(3) A charging device faces the horizontal surface of the image forming body, a cleaning device is provided above the charging device, and a cleaning device is provided between the cleaning device and the charging device to face the surface of the image forming body and clean the toner capturing electrode and the electrode. 2. The image forming apparatus according to claim 1, further comprising a free toner collecting means. （４）複数の現像装置を配設していて、像形成体面に複
数のトナー像の重ね合わせから成るカラー画像を形成す
る特許請求の範囲第１項記載の画像形成装置。(4) The image forming apparatus according to claim 1, wherein a plurality of developing devices are disposed, and a color image formed by overlapping a plurality of toner images is formed on the surface of an image forming member.