JPH07333931A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPH07333931A
JPH07333931A JP6151690A JP15169094A JPH07333931A JP H07333931 A JPH07333931 A JP H07333931A JP 6151690 A JP6151690 A JP 6151690A JP 15169094 A JP15169094 A JP 15169094A JP H07333931 A JPH07333931 A JP H07333931A
Authority
JP
Japan
Prior art keywords
transfer material
air
fixing device
transfer
image forming
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
JP6151690A
Other languages
Japanese (ja)
Inventor
Nobutaka Noda
信隆 野田
Makoto Yamazaki
誠 山崎
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.)
Katsuragawa Electric Co Ltd
Original Assignee
Katsuragawa Electric 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 Katsuragawa Electric Co Ltd filed Critical Katsuragawa Electric Co Ltd
Priority to JP6151690A priority Critical patent/JPH07333931A/en
Publication of JPH07333931A publication Critical patent/JPH07333931A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paper Feeding For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

PURPOSE:To separate a transfer material in a fixed separation position for preventing a failure in transfer and to prevent the meandering of the transfer material by means of prevention of floating and the wrinkles of the transfer material generated after fixing by blowing air over the transfer material in the upper part of a carrying/guiding means and pressurizing the transfer material thereon. CONSTITUTION:An air blower means 4 blowing the air over the transfer material 10 from the upper part of the carrying/guiding means 2 and pressing the material 10 thereonto is provided. The air blower means 4 blows air over the material 10 in almost all areas in a direction nearly perpendicular to the transfer material 10 and the width direction over a fixing device 3 from the separation position 16 of the material 10 on a photoreceptor drum 5 with an air quantity so as not to scatter unfixed toner on the material 10. Especially, the air is blown over the guiding plate 15 of the carrying/guiding means 2 and the transfer material 10 is separated from the drum 5 at the fixed separation position 16 by the blowing of air and pressed onto the front surfaces of the carrying belt 14 of the carrying/guiding means 2 and the guiding plate 15, to be carried to the fixing device 3 without being floated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、複写機、プリンター等
の画像形成装置に関し、特には、未定着のトナー画像を
担持した転写材を送風手段によって搬送案内手段に押圧
させながら搬送させる画像形成装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine or a printer, and more particularly to an image forming apparatus in which a transfer material carrying an unfixed toner image is conveyed while being pressed by a conveying guide means by a blowing means. Regarding the device.

【0002】[0002]

【従来の技術】画像形成装置において、トナー像を担持
した感光ドラムからトナー像を転写材上に転写して分離
する場合、分離位置の遅れ等により転写不良を生じる場
合がある。このような転写不良を生じさせないように分
離コロナ(通常はACコロナ)によって所定の分離位置
で転写材を感光ドラムから分離させる必要がある。また
一方、分離後の転写材を搬送し、定着する際に転写材に
しわを生じさせないようにする必要がある。特に、A2
以上のような大判サイズを扱う複写機等の画像形成装置
は、転写材の紙サイズの大きさや厚さ、または、紙サイ
ズの大きさによって生じるこしの弱さのために、転写材
の分離時の転写不良による画像の乱れや欠損、或いは転
写材の先端が定着装置等のローラ部分に接触する際のし
わ等の発生が生じ易い。
2. Description of the Related Art In an image forming apparatus, when a toner image is transferred from a photosensitive drum carrying a toner image onto a transfer material for separation, a transfer failure may occur due to a delay in the separation position or the like. It is necessary to separate the transfer material from the photosensitive drum at a predetermined separation position by a separation corona (usually AC corona) so as not to cause such a transfer failure. On the other hand, it is necessary to prevent the wrinkle from occurring in the transfer material when the transfer material after separation is conveyed and fixed. In particular, A2
An image forming apparatus such as a copying machine that handles a large-sized sheet as described above may not be used when the transfer material is separated because of the paper size and thickness of the transfer material, or the weakness of stiffness caused by the paper size. Is likely to be disturbed or lost due to poor transfer, or wrinkles or the like may occur when the tip of the transfer material comes into contact with the roller portion of the fixing device or the like.

【0003】例えば、図3に示すように、転写コロナ放
電器9によって感光ドラム5上に形成されたトナー像を
転写材10上に転写し、次いで交流、または交流に直流
を重畳した分離コロナ放電器11によって転写材10の
裏面側から除電する。その後、転写材10は分離爪17
と拍車18により転写材10の浮きを防止させながら感
光ドラム5から転写材を分離している。
For example, as shown in FIG. 3, the toner image formed on the photosensitive drum 5 is transferred onto the transfer material 10 by the transfer corona discharger 9, and then an alternating current or a separated corona discharge in which a direct current is superposed on the alternating current is discharged. The electricity is removed from the back side of the transfer material 10 by the electric device 11. After that, the transfer material 10 is separated by the separating claw 17.
The spur 18 separates the transfer material from the photosensitive drum 5 while preventing the transfer material 10 from floating.

【0004】また、感光ドラム5から分離された転写材
10は、未定着のトナー像をその上面に担持しているた
め転写材をローラ等で挟んで搬送することができず、搬
送ベルト14または搬送ローラ等により転写材の下面の
みを接触させて定着装置3へと搬送している。更に搬送
ベルト14の中に吸引ファン21を設け、或いは適当な
ダクトを介して接続し、転写材10を搬送ベルト14上
に吸引しながら定着装置3へと搬送している。
Further, since the transfer material 10 separated from the photosensitive drum 5 carries an unfixed toner image on its upper surface, the transfer material cannot be conveyed by sandwiching the transfer material with rollers or the like. Only the lower surface of the transfer material is brought into contact with a transport roller or the like and is transported to the fixing device 3. Further, a suction fan 21 is provided in the conveyor belt 14 or is connected via an appropriate duct to convey the transfer material 10 to the fixing device 3 while sucking the transfer material 10 onto the conveyor belt 14.

【0005】更に、しわが発生しづらい手段の一つとし
て、ガイド板15を定着装置3の手前側に設け、転写材
10を定着装置15に案内させている。このガイド板1
5は中央部が上方に向かって湾曲しており、転写材10
の先端の中央部付近を最初に定着装置3のローラ部分に
接触させ、両端に向かって接触を伝播させている。これ
によれば転写材10の定着装置3のローラ部分への接触
が徐々に幅方向中央から両端に向かう。このため、転写
材10がローラ部分にきれいに送り込まれ、しわの発生
を抑えている。
Further, as one of the means for preventing wrinkles, a guide plate 15 is provided on the front side of the fixing device 3 to guide the transfer material 10 to the fixing device 15. This guide plate 1
5 has a center portion curved upward, and the transfer material 10
First, the vicinity of the central portion of the tip of is contacted with the roller portion of the fixing device 3, and the contact is propagated toward both ends. According to this, the contact of the transfer material 10 with the roller portion of the fixing device 3 gradually goes from the center in the width direction to both ends. For this reason, the transfer material 10 is sent to the roller portion cleanly and wrinkles are suppressed.

【0006】[0006]

【発明が解決しようとする課題】上記した構成の装置
は、使用する転写材の種類や周囲の環境の変化によって
転写不良を起こし易く、図2に示すように転写材10が
感光ドラム5表面を添うように分離してしまう場合があ
る。このため、いったん転写材10に転写されたトナー
が再び感光ドラム5側に移る再転写現象が起きてしま
う。特に、転写材10の厚みが薄い場合や、低湿度時に
上記した転写不良が発生し易くなる。
In the apparatus having the above-mentioned structure, a transfer failure is likely to occur due to the type of transfer material used and changes in the surrounding environment. As shown in FIG. In some cases, they separate as they go along. Therefore, a retransfer phenomenon occurs in which the toner once transferred to the transfer material 10 moves to the photosensitive drum 5 side again. In particular, when the transfer material 10 has a small thickness or when the humidity is low, the above-mentioned transfer failure is likely to occur.

【0007】また、図3に示すように転写材10を感光
ドラム5から分離するために分離爪17が感光ドラム5
に接触して設けられている。このため回転する感光ドラ
ム5と分離爪17との摺擦により感光ドラム5表面を損
傷してしまう。更に、感光ドラム5の近傍に拍車18が
回転可能に設けられており、これによって分離された転
写材10の浮き上がりを防止している。しかしながら拍
車18が転写材10を押さえつけるため、転写材10上
の未定着トナー像を損傷してしまい良好な転写画像が得
られない。
Further, as shown in FIG. 3, the separation claw 17 is provided to separate the transfer material 10 from the photosensitive drum 5.
Is provided in contact with. Therefore, the surface of the photosensitive drum 5 is damaged by the sliding friction between the rotating photosensitive drum 5 and the separating claw 17. Further, a spur 18 is rotatably provided near the photosensitive drum 5 to prevent the transfer material 10 separated from rising. However, since the spur 18 presses the transfer material 10, the unfixed toner image on the transfer material 10 is damaged and a good transferred image cannot be obtained.

【0008】感光ドラム5から分離された転写材は、搬
送案内手段としての搬送ベルト14により搬送され、そ
の内部には、搬送による転写材の浮き上がりおよび蛇行
を防止する吸引ファン21が設けられ或いは適当なダク
トを介して接続されており、転写材10をベルト上に固
定するように吸引しながら搬送している。駆動機構を有
する搬送ベルト14の内部に吸引ファン21を設けるこ
とは、繁雑な設計および工程を含み、高価なものとなっ
てしまう。
The transfer material separated from the photosensitive drum 5 is conveyed by a conveyor belt 14 serving as a conveyance guide means, and a suction fan 21 for preventing the transfer material from floating and meandering due to the conveyance is provided therein, or is suitable. The transfer material 10 is conveyed while being sucked so as to be fixed on the belt. Providing the suction fan 21 inside the conveyor belt 14 having a drive mechanism involves complicated design and steps, and is expensive.

【0009】定着工程において、しわの発生しない良好
な転写材を得るためには、転写材10をガイド板15上
に浮き上がらせないようにし、転写材10をその幅方向
の中央部付近から定着装置3に案内する必要があり、ガ
イド板15を適切な位置および角度に調整しなければな
らない。また、このガイド板15の調整に伴い定着装置
3にも機械的精度等が要求され、これらを調整する作業
が繁雑となる。
In order to obtain a good transfer material without wrinkles in the fixing step, the transfer material 10 is prevented from floating above the guide plate 15, and the transfer material 10 is fixed from the vicinity of the center in the width direction of the fixing device. 3 and the guide plate 15 must be adjusted to the proper position and angle. Further, along with the adjustment of the guide plate 15, the fixing device 3 is also required to have mechanical precision and the like, and the work of adjusting these is complicated.

【0010】本発明は、上記した問題点に鑑みてなされ
たものであり、簡単な構成によって転写材の転写不良を
防止し、分離爪による感光ドラムの損傷および拍車によ
る転写材上のトナー像への損傷を防止し、搬送ベルト上
を搬送される転写材の蛇行を防止し、ガイド板および定
着装置の調整を不要として、画像欠陥のない良好な転写
画像を得ることができる画像形成装置を提供することを
課題とする。
The present invention has been made in view of the above problems, and prevents a transfer failure of a transfer material with a simple structure, and damages the photosensitive drum due to a separating claw and a toner image on the transfer material due to spurs. Provided is an image forming apparatus capable of preventing damage to a sheet, preventing meandering of a transfer material conveyed on a conveyor belt, and eliminating a need for adjustment of a guide plate and a fixing device to obtain a good transferred image without image defects. The task is to do.

【0011】[0011]

【課題を解決するための手段】上記課題を解決するた
め、本発明は、画像形成後に像担持体から分離された転
写材を定着装置に搬送する搬送案内手段を有する画像形
成装置において、前記転写材に前記搬送案内手段の上方
から送風し、前記搬送案内手段に前記転写材を押圧させ
る送風手段を設けたことを特徴とする。
In order to solve the above-mentioned problems, the present invention provides an image forming apparatus having a conveyance guide means for conveying a transfer material separated from an image carrier to a fixing device after image formation. It is characterized in that the material is provided with air blowing means for blowing air from above the conveying guide means and for causing the conveying guide means to press the transfer material.

【0012】また、前記搬送案内手段は、前記転写材を
前記定着装置に案内するガイド板を含み、前記送風手段
により前記ガイド板の上方から前記転写材の幅方向ほぼ
全域に送風することを特徴とし、前記搬送案内手段は、
前記転写材を前記定着装置に案内する搬送ベルトを含
み、前記送風手段により前記搬送ベルトの上方から前記
転写材の幅方向ほぼ全域に送風することを特徴とする。
Further, the carrying guide means includes a guide plate for guiding the transfer material to the fixing device, and the air blowing means blows air from above the guide plate to almost the entire widthwise direction of the transfer material. And the transport guide means,
It is characterized in that it includes a conveyor belt for guiding the transfer material to the fixing device, and blows air from above the conveyor belt to almost the entire area of the transfer material in the width direction.

【0013】更に、前記送風手段による風量は、転写材
上に形成された未定着のトナーを飛翔させない程度の風
量であることを特徴とし、前記送風手段による前記搬送
案内手段への送風に伴い、像担持体と転写材とを分離す
るように送風させることを特徴とする。
Further, the air volume by the air blowing means is an air volume which does not fly unfixed toner formed on the transfer material. With the air blowing by the air blowing means to the conveyance guide means, It is characterized in that air is blown so as to separate the image carrier and the transfer material.

【0014】[0014]

【作用】このような構成において、送風手段によって感
光ドラムにおける転写材の分離位置から定着装置にわた
って転写材に対してほぼ垂直の方向に且つ幅方向のほぼ
全域に送風し、転写材上の未定着トナーが飛散しない程
度の風量で送風する。特に搬送案内手段のガイド板に対
して送風を行う。 この送風により感光ドラムから所定
の分離位置で転写材を分離させ、搬送案内手段の搬送ベ
ルトおよびガイド板の上面に転写材を押圧させ、転写材
の浮き上がりを生じさせずに定着装置に搬送させる。
In such a structure, the air blower blows air from the separating position of the transfer material on the photosensitive drum to the fixing device in a direction substantially perpendicular to the transfer material and almost in the entire width direction, so that unfixed on the transfer material. The air is blown in such an amount that the toner is not scattered. In particular, air is blown to the guide plate of the conveyance guide means. By this air blowing, the transfer material is separated from the photosensitive drum at a predetermined separation position, and the transfer material is pressed against the upper surfaces of the transfer belt and the guide plate of the transfer guide means, and the transfer material is transferred to the fixing device without floating.

【0015】[0015]

【実施例】本発明の好適な実施例を図面に基づいて説明
する。図1は本発明による画像形成装置を示す側断面図
であり、大別して画像形成部1と、転写材の搬送案内手
段2と、定着装置3とから構成される。後述する画像形
成部の分離位置16と定着装置3との間に位置する搬送
案内手段2の上方には転写材を搬送案内手段2に押圧さ
せながら搬送させる送風手段としての送風ファン4が配
置されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view showing an image forming apparatus according to the present invention, which is roughly composed of an image forming section 1, a transfer material conveyance guide means 2, and a fixing device 3. An air blower fan 4 as an air blower for moving the transfer material while pressing the transfer material against the transfer guide means 2 is arranged above the transfer guide means 2 located between the separating position 16 of the image forming unit and the fixing device 3 which will be described later. ing.

【0016】周知のように画像形成部1として、感光ド
ラム5を中心に、感光ドラム5表面を一様に帯電させる
コロナ帯電器6、原稿像を投射して感光ドラム5上に潜
像を形成させる光学投影装置7、この潜像を現像する現
像装置8、不図示のロール紙またはカット紙を装填した
給紙部から送られる転写材10に可視像化されたトナー
像を転写する転写コロナ放電器9、感光体ドラム5から
転写材10を分離するAC分離コロナ放電器11、感光
ドラム5表面上に転写後の残留した現像剤を除去するク
リーナー12、感光ドラム5表面の表面電位を均一にす
るためのイレーサランプ13とを有し、これらが順次に
感光ドラム5に作用するように配置されている。
As is well known, as the image forming section 1, a corona charger 6 for uniformly charging the surface of the photosensitive drum 5 with the photosensitive drum 5 as a center, and an original image is projected to form a latent image on the photosensitive drum 5. An optical projection device 7 for developing the latent image, a developing device 8 for developing the latent image, and a transfer corona for transferring the visualized toner image onto a transfer material 10 fed from a paper feed unit loaded with unillustrated roll paper or cut paper. The discharger 9, the AC separation corona discharger 11 for separating the transfer material 10 from the photosensitive drum 5, the cleaner 12 for removing the developer remaining on the surface of the photosensitive drum 5 after transfer, and the uniform surface potential on the surface of the photosensitive drum 5. And an eraser lamp 13 for operating the photosensitive drum 5 in sequence.

【0017】また、分離コロナ放電器11の近傍と定着
装置3との間には分離コロナ放電器11によって分離さ
れた転写材10を定着装置3に搬送案内するための搬送
案内手段2としての搬送ベルト14およびガイド板15
が配置されている。ガイド板15の先端部にはトナー像
を転写材10上に永久画像として定着する定着装置3が
配置されている。
Further, between the vicinity of the separating corona discharger 11 and the fixing device 3, a transfer guide means 2 for conveying and guiding the transfer material 10 separated by the separating corona discharger 11 to the fixing device 3. Belt 14 and guide plate 15
Are arranged. At the tip of the guide plate 15, a fixing device 3 that fixes the toner image on the transfer material 10 as a permanent image is arranged.

【0018】送風ファン4は、好適にはガイド板15の
上方に位置され、好ましくは、搬送される転写材10に
対してほぼ直角の方向に且つ転写材の幅方向ほぼ全域に
わたって送風しており、送風ファン4からの風は主にガ
イド板15またはガイド板15上に案内される転写材1
0に当たる。また、この風は転写材10またはガイド板
15に添って流れ、搬送ベルト14上に送風される。更
に、風は分離コロナ放電器11により転写材10を感光
ドラム5から分離する分離位置16に到達する。送風フ
ァン4の送風量は転写材10上に形成されたトナーが飛
散しない程度の風量が好ましく、搬送ベルト14もしく
はガイド板15にトナーの極性とは反対のバイアス電圧
をかけることにより転写材10上のトナーの飛散が抑え
ることができ、風量をコントロールすることができる。
The blower fan 4 is preferably located above the guide plate 15 and preferably blows air in a direction substantially perpendicular to the transferred transfer material 10 and over substantially the entire width direction of the transfer material. The wind from the blower fan 4 is mainly guided to the guide plate 15 or the guide plate 15
Hit 0. Further, this wind flows along the transfer material 10 or the guide plate 15 and is blown onto the conveyor belt 14. Further, the wind reaches the separation position 16 where the transfer material 10 is separated from the photosensitive drum 5 by the separation corona discharger 11. The amount of air blown by the blower fan 4 is preferably such that the toner formed on the transfer material 10 does not scatter, and the bias voltage opposite to the polarity of the toner is applied to the transfer belt 14 or the guide plate 15 so that the transfer material 10 is transferred. The toner scattering can be suppressed, and the air volume can be controlled.

【0019】転写材10の動作を説明すると、コロナ放
電器6によって帯電された感光ドラム5上に、前記した
ように光学投影装置7により光像が投影されると、この
光像に応じた潜像が感光ドラム5の感光体表面に形成さ
れる。この潜像は現像装置8によって現像されてトナー
像を形成し、トナー像は転写コロナ放電器9の作用によ
り転写材10上に転写される。転写材10は次いで、分
離コロナ放電器11により感光ドラム5から分離され
る。この分離時に送風ファン4から送られる風が感光ド
ラム5と転写材10のとの間に流れ、転写材10を所定
の分離位置16で分離することができる。
The operation of the transfer material 10 will be described. When the optical image is projected on the photosensitive drum 5 charged by the corona discharger 6 by the optical projection device 7 as described above, the latent image corresponding to the optical image is projected. An image is formed on the surface of the photosensitive body of the photosensitive drum 5. This latent image is developed by the developing device 8 to form a toner image, and the toner image is transferred onto the transfer material 10 by the action of the transfer corona discharger 9. The transfer material 10 is then separated from the photosensitive drum 5 by the separation corona discharger 11. At the time of this separation, the air sent from the blower fan 4 flows between the photosensitive drum 5 and the transfer material 10, and the transfer material 10 can be separated at a predetermined separation position 16.

【0020】次いで、転写材10は、転写材10を搬送
するために帯状の複数または単数の無端ベルトを搬送方
向に並べて構成された搬送ベルト14によって搬送され
る。この搬送時に送風ファン4から送られる風が転写材
10の上方向から流れ、転写材10は搬送ベルト14に
押圧される。この風によって搬送ベルト14に対して転
写材10の浮き上がりを防止し、転写材10の蛇行を防
止している。また、搬送ベルト14内部に吸引ファンを
設けて併用しても良い。
Next, the transfer material 10 is transported by a transport belt 14 configured by arranging a plurality of belt-shaped or single endless belts in the transport direction in order to transport the transfer material 10. At the time of this conveyance, the air blown from the blowing fan 4 flows from above the transfer material 10, and the transfer material 10 is pressed against the conveyance belt 14. The wind prevents the transfer material 10 from floating on the conveyor belt 14 and prevents the transfer material 10 from meandering. Further, a suction fan may be provided inside the conveyor belt 14 and used together.

【0021】搬送ベルト14によって搬送された転写材
10は、ガイド板15の上面を通過して定着装置3へと
案内される。この通過時に送風ファン4から送られる風
が転写材10の上方向から流れ、転写材はガイド板15
に押圧される。この風によってガイド板15に対して転
写材10の浮き上がりを防止する。即ち、転写材10に
たわみを持たせず均一な面を有して転写材10を定着装
置3へと案内している。このためガイド板15をフラッ
トな面に形成しても良い。次いで、定着装置3に案内さ
れた転写材10は上記した良好な状態で定着され、転写
不良が発生せず、しわの発生がない複写画像を有して装
置外部へと排出される。
The transfer material 10 transported by the transport belt 14 passes through the upper surface of the guide plate 15 and is guided to the fixing device 3. At this time, the air sent from the blower fan 4 flows from above the transfer material 10, and the transfer material is guided by the guide plate 15.
Is pressed by. This wind prevents the transfer material 10 from floating on the guide plate 15. That is, the transfer material 10 is guided to the fixing device 3 with a uniform surface without any bending. Therefore, the guide plate 15 may be formed on a flat surface. Next, the transfer material 10 guided to the fixing device 3 is fixed in the above-described favorable state, and a copy image having no transfer defects and no wrinkles is discharged to the outside of the device.

【0022】尚、定着装置3は、図1に示すように相対
的に圧接するように配置された定着ローラ19と加圧ロ
ーラ20との構成であるが、定着ローラと加圧ベルトと
の構成であっても良い。また、送風ファン4の送風によ
る定着装置3のヒータ温度の低下を防止するために、転
写材10が分離位置16、搬送ベルト14、ガイド板1
5のいずれかの位置に位置しているときのみに送風を行
っても良い。更に、実施例として感光ドラム5を用いた
場合を示したが、感光ベルトを使用しても同様の効果が
得られた。
The fixing device 3 is composed of a fixing roller 19 and a pressure roller 20 which are arranged so as to be in relative pressure contact with each other as shown in FIG. May be Further, in order to prevent the temperature of the heater of the fixing device 3 from lowering due to the blowing of the blowing fan 4, the transfer material 10 has the separating position 16, the conveying belt 14, and the guide plate 1.
The air may be blown only when it is located at any one of the positions. Further, although the case where the photosensitive drum 5 is used is shown as an example, the same effect can be obtained by using the photosensitive belt.

【0023】[0023]

【発明の効果】本発明の画像形成装置は、搬送案内手段
の上方に送風手段を設け、搬送案内される転写材の上方
から送風するという簡単な構成によって、この送風によ
り感光ドラムから所定の分離位置で転写材を分離させて
転写不良を防止し、搬送案内手段の搬送ベルトの上面に
転写材を押圧させて浮き上がり防止して転写材の蛇行を
防止し、搬送案内手段のガイド板の上面に転写材を押圧
させて定着装置に案内させることにより定着後に発生す
る転写材のしわを防止することができる。また、搬送ベ
ルトの内部に設けた吸引ファンを必要とせず、フラット
な面のガイド板を使用することが可能となる。更に、ガ
イド板および定着装の機械精度を緩和することができ、
繁雑な調整をする必要がない。
The image forming apparatus of the present invention has a simple structure in which the air blowing means is provided above the conveying guide means and air is blown from above the transfer material being conveyed and guided. The transfer material is separated at a position to prevent transfer failure, and the transfer material is pressed against the upper surface of the conveyor belt of the conveyance guide means to prevent the transfer material from floating and to prevent the transfer material from meandering. By pressing the transfer material and guiding it to the fixing device, it is possible to prevent wrinkles of the transfer material that occur after fixing. Further, it is possible to use a guide plate having a flat surface without requiring a suction fan provided inside the conveyor belt. Furthermore, the mechanical precision of the guide plate and the fixing device can be relaxed,
There is no need for complicated adjustments.

【0022】[0022]

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

【図1】 本発明による実施例を示す側断面図。FIG. 1 is a side sectional view showing an embodiment according to the present invention.

【図2】 従来例の一例を示す側断面図。FIG. 2 is a side sectional view showing an example of a conventional example.

【図3】 従来例の一例を示す側断面図。FIG. 3 is a side sectional view showing an example of a conventional example.

【符号の説明】[Explanation of symbols]

1 画像形成部 2 搬送案内手段 3 定着装置 4 送風ファン 5 感光ドラム 10 転写材 11 分離コロナ放電器 14 搬送ベルト 15 ガイド板 16 分離位置 17 分離爪 18 拍車 19 定着ローラ 20 加圧ローラ 1 Image Forming Section 2 Conveying Guide Means 3 Fixing Device 4 Blower Fan 5 Photosensitive Drum 10 Transfer Material 11 Separation Corona Discharger 14 Conveyor Belt 15 Guide Plate 16 Separation Position 17 Separation Claw 18 Spurs 19 Fixing Roller 20 Pressure Roller

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 画像形成後に像担持体から分離された転
写材を定着装置に搬送する搬送案内手段を有する画像形
成装置において、前記転写材に前記搬送案内手段の上方
から送風し、前記搬送案内手段に前記転写材を押圧させ
る送風手段を設けたことを特徴とする画像形成装置。
1. An image forming apparatus having a transport guide unit for transporting a transfer material separated from an image carrier to a fixing device after image formation, wherein air is blown to the transfer material from above the transport guide unit, and the transport guide is provided. An image forming apparatus, characterized in that the means is provided with a blowing means for pressing the transfer material.
【請求項2】 前記搬送案内手段は、前記転写材を前記
定着装置に案内するガイド板を含み、前記送風手段によ
り前記ガイド板の上方から前記転写材の幅方向ほぼ全域
に送風することを特徴とする請求項1記載の画像形成装
置。
2. The conveyance guide means includes a guide plate for guiding the transfer material to the fixing device, and blows air from above the guide plate to almost the entire width direction of the transfer material by the blowing means. The image forming apparatus according to claim 1.
【請求項3】 前記搬送案内手段は、前記転写材を前記
定着装置に案内する搬送ベルトを含み、前記送風手段に
より前記搬送ベルトの上方から前記転写材の幅方向ほぼ
全域に送風することを特徴とする請求項1記載の画像形
成装置。
3. The conveyance guide means includes a conveyance belt that guides the transfer material to the fixing device, and blows air from above the conveyance belt to almost the entire width direction of the transfer material by the blowing means. The image forming apparatus according to claim 1.
【請求項4】 前記送風手段による風量は、転写材上に
形成された未定着のトナーを飛翔させない程度の風量で
あることを特徴とする請求項1乃至3いずれか記載のが
像形成装置。
4. The image forming apparatus according to claim 1, wherein the air volume of the air blowing unit is such that the unfixed toner formed on the transfer material does not fly.
【請求項5】 前記送風手段による前記搬送案内手段へ
の送風に伴い、像担持体と転写材とを分離するように送
風させることを特徴とする請求項1乃至4いずれか記載
の画像形成装置。
5. The image forming apparatus according to claim 1, wherein the air is blown so as to separate the image carrier and the transfer material when the air blower blows air to the conveyance guide means. .
JP6151690A 1994-06-08 1994-06-08 Image forming device Pending JPH07333931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6151690A JPH07333931A (en) 1994-06-08 1994-06-08 Image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6151690A JPH07333931A (en) 1994-06-08 1994-06-08 Image forming device

Publications (1)

Publication Number Publication Date
JPH07333931A true JPH07333931A (en) 1995-12-22

Family

ID=15524140

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6151690A Pending JPH07333931A (en) 1994-06-08 1994-06-08 Image forming device

Country Status (1)

Country Link
JP (1) JPH07333931A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008070554A (en) * 2006-09-13 2008-03-27 Katsuragawa Electric Co Ltd Image forming apparatus
US10133237B2 (en) 2016-11-28 2018-11-20 Kyocera Document Solutions Inc. Image forming apparatus that suppresses temperature rise in developing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008070554A (en) * 2006-09-13 2008-03-27 Katsuragawa Electric Co Ltd Image forming apparatus
US10133237B2 (en) 2016-11-28 2018-11-20 Kyocera Document Solutions Inc. Image forming apparatus that suppresses temperature rise in developing device

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