JPH0497186A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0497186A JPH0497186A JP21255890A JP21255890A JPH0497186A JP H0497186 A JPH0497186 A JP H0497186A JP 21255890 A JP21255890 A JP 21255890A JP 21255890 A JP21255890 A JP 21255890A JP H0497186 A JPH0497186 A JP H0497186A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- intermediate transfer
- roller
- toner
- contact
- 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
- 238000004140 cleaning Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000270281 Coluber constrictor Species 0.000 description 1
- GXCLVBGFBYZDAG-UHFFFAOYSA-N N-[2-(1H-indol-3-yl)ethyl]-N-methylprop-2-en-1-amine Chemical compound CN(CCC1=CNC2=C1C=CC=C2)CC=C GXCLVBGFBYZDAG-UHFFFAOYSA-N 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- OQZCSNDVOWYALR-UHFFFAOYSA-N flurochloridone Chemical compound FC(F)(F)C1=CC=CC(N2C(C(Cl)C(CCl)C2)=O)=C1 OQZCSNDVOWYALR-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、画像形成装置に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to an image forming apparatus.
従来の技術
従来からファクシミリ、レーサープリンタあるいはカラ
ー複写機等に画像形成装置か使用されている。2. Description of the Related Art Image forming apparatuses have been used in facsimiles, racer printers, color copying machines, and the like.
以下従来の画像形成装置について説明する。A conventional image forming apparatus will be described below.
第２図は従来の画像形成装置の概略構成図、第３図は従
来の画像形成装置の要部拡大図である。FIG. 2 is a schematic configuration diagram of a conventional image forming apparatus, and FIG. 3 is an enlarged view of main parts of the conventional image forming apparatus.
第２図、第３図において、１は光宵機半導電体ベルト（
以下、ＯＰＣベルトと略称する。）、２は外周にＯＰＣ
ベルトｌを巻回して張架するとともにＯＰＣベルトｌを
駆動するためのＯＰＣ駆動ロラー、３はＯＰＣベルト１
に近接して取り付けられＯＰＣベルト１の表面を一様に
帯電させる帯電器、４は画像情報に従い○ＰＣベルト１
に光を照射するレーザ照射器、５はイエローのトナーを
ＯＰＣベルト１上に形成された静電潜像に付着させて顕
像化する現像器、６はマゼンタのトナーをＯＰＣヘル２
上に形成された静電潜像に付着させて顕像化する現像器
、７はシアンのトナーをＯＰＣベルトｌ上に形成された
静電潜像に付着させて顕像化する現像器、８はブラック
のトナーをＯＰＣベルトｌ上に形成された静電潜像に付
着させて顕像化する現像器である。９は中間転写ベルト
、ＩＯは外周に中間転写ベルト９を巻回して張架すると
ともに中間転写ベルト９を駆動するための中間転写駆動
ローラー、１５はＯＰＣベルト１に付着したトナーを中
間転写ベルト９に転写する中間転写ローラー、１１は転
写後のＯＰＣベルトｌ上の残留トナーを掻き落としクリ
ーニングするクリーニング器である。１２は複写紙、１
３は複写紙を蓄えておく用紙力セント、１４は複写紙を
搬送するレジストローラー、１９は複写紙１２を中間転
写ベルト９に押圧し転写電圧を印加して中間転写ベルト
９に付着したトナーを複写紙１２に転写する転写ローラ
ーてローラー保持部材２０により回動自在に保持されて
おり、転写ローラー１９と中間転写駆動ローラー１０と
の中心を結ぶ線上で中間転写ベルト９と複写紙Ｉ２とは
接していない。！６は複写紙Ｉ２に転写されたトナーを
定着させる定着器である。In Figures 2 and 3, 1 is a Koyoki semiconductor belt (
Hereinafter, it will be abbreviated as OPC belt. ), 2 has OPC on the outer periphery
3 is an OPC drive roller for winding and tensioning the belt 1 and driving the OPC belt 1; 3 is an OPC belt 1;
A charger that is installed close to the OPC belt 1 to uniformly charge the surface of the OPC belt 1, 4 is a charger that is installed close to the
5 is a developer that attaches yellow toner to the electrostatic latent image formed on the OPC belt 1 and makes it visible; 6 is a developer that applies magenta toner to the OPC belt 2;
A developing device 7 makes cyan toner adhere to the electrostatic latent image formed on the OPC belt l and makes it visible; is a developing device that attaches black toner to an electrostatic latent image formed on an OPC belt l to visualize it. 9 is an intermediate transfer belt; IO is an intermediate transfer drive roller for winding and tensioning the intermediate transfer belt 9 around its outer periphery and driving the intermediate transfer belt 9; 15 is an intermediate transfer belt 9 for transferring toner attached to the OPC belt 1; An intermediate transfer roller 11 is a cleaning device that scrapes off residual toner on the OPC belt l after the transfer. 12 is copy paper, 1
3 is a paper force centrifuge for storing copy paper; 14 is a registration roller for conveying the copy paper; 19 is a roller that presses the copy paper 12 against the intermediate transfer belt 9 and applies a transfer voltage to remove toner attached to the intermediate transfer belt 9; The transfer roller that transfers the image onto the copy paper 12 is rotatably held by a roller holding member 20, and the intermediate transfer belt 9 and the copy paper I2 are in contact with each other on a line connecting the centers of the transfer roller 19 and the intermediate transfer drive roller 10. Not yet. ! A fixing device 6 fixes the toner transferred to the copy paper I2.
以上のように構成された画像形成装置についてその動作
を以下に説明する。The operation of the image forming apparatus configured as described above will be described below.
まず、ＯＰＣベルト１かＯＰＣ駆動ローラー２によって
回転駆動されつつ帯電器３に電圧か印加されると、ＯＰ
ＣベルトＩの表面か一様に帯電された状態となる。この
状態の○ＰＣベルト１の表面にイエローの画像情報を与
えられたレーザ光をレーザ照射器４により照射するとＯ
ＰＣベルト１の表面の照射された部分は電荷か消え静電
潜像か形成される。First, when a voltage is applied to the charger 3 while being rotationally driven by the OPC belt 1 or the OPC drive roller 2, the OP
The surface of the C-belt I becomes uniformly charged. When the surface of the ○PC belt 1 in this state is irradiated with a laser beam given yellow image information by the laser irradiator 4, O
The irradiated portion of the surface of the PC belt 1 loses its charge and forms an electrostatic latent image.
次に、現像器５て、ＯＰＣベルト１表面上に形成された
静電潜像をイエローのトナーによって顕像化し、このイ
エローのトナーは転写電圧か印加された中間転写ローラ
ー１５か中間転写ベルト９をＯＰＣベルトｌへ押圧する
ことにより中間転写ベルト９へ転写され、ＯＰＣベルト
１の表面に残った残留トナーはクリーニング器１１によ
って掻き落とされ、掻き落とされた残留トナーはクリー
ニング器１１の内部へ回収される。同様にマセンタ、シ
アン、ブラックの順に各成分の静電潜像を顕像化して中
間転写ベルト９へ転写をし、中間転写ベルト９上に合成
像を形成する。Next, the developing device 5 visualizes the electrostatic latent image formed on the surface of the OPC belt 1 with yellow toner, and this yellow toner is transferred to the intermediate transfer roller 15 or intermediate transfer belt 9 to which a transfer voltage is applied. The residual toner remaining on the surface of the OPC belt 1 is scraped off by the cleaning device 11, and the scraped residual toner is collected inside the cleaning device 11. be done. Similarly, the electrostatic latent images of each component are visualized and transferred to the intermediate transfer belt 9 in the order of macenter, cyan, and black, thereby forming a composite image on the intermediate transfer belt 9.
複写紙１２が、用紙カセット１３よりレジストローラー
１４によって中間転写ベルト９と転写ローラー１９の間
へ搬送されると、転写クーラー１９に転写電圧が印加さ
れ合成像は複写紙１２へ転写される。複写紙１２へ転写
された合成像は定着器１６により定着される。When the copy paper 12 is conveyed from the paper cassette 13 by the registration roller 14 to between the intermediate transfer belt 9 and the transfer roller 19, a transfer voltage is applied to the transfer cooler 19 and the composite image is transferred onto the copy paper 12. The composite image transferred to the copy paper 12 is fixed by a fixing device 16.
発明か解決しようとする課題
しかしなから前記従来の構成ては、転写ローラー１９と
中間転写駆動ローラー１０との中心を結ぶ線上で中間転
写ベルト９と複写紙Ｉ２が接しない状態で転写ローラー
１９へ転写電圧を印加することにより中間転写ベルト９
上のトナーは複写紙１２へ転写されていた。このため、
中間転写ベルト９のベルト駆動と複写紙１２の搬送とに
よって生じる機械的振動により、中間転写ベルト９と複
写紙１２との離接点が移動し中間転写ベルト９と複写紙
１２との接触面積か変化し、画像に濃度ムラを生し画質
を劣化させるという問題点を有していた。However, in the conventional configuration, the intermediate transfer belt 9 and the copy paper I2 are not in contact with each other on the line connecting the centers of the transfer roller 19 and the intermediate transfer drive roller 10, but the copy sheet I2 is transferred to the transfer roller 19. By applying a transfer voltage, the intermediate transfer belt 9
The upper toner had been transferred to the copy paper 12. For this reason,
Mechanical vibrations caused by belt driving of the intermediate transfer belt 9 and conveyance of the copy paper 12 move the point of contact and separation between the intermediate transfer belt 9 and the copy paper 12, and the contact area between the intermediate transfer belt 9 and the copy paper 12 changes. However, this method has the problem of causing density unevenness in the image and deteriorating the image quality.
課題を解決するための手段
本発明は前記問題点を解決するため、画像情報に従いト
ナーが付着するトナー付着ベルトを外周に巻回して張架
するベルトローラーへ記録媒体をトナー付着ベルトを介
して押圧し、トナー付着ベルトに付着したトナーを記録
媒体に転写する転写ローラーの中心とトナー付着ベルト
ローラーの中心とを結ぶ線上においてトナー付着ベルト
と記録媒体か接するようにした。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention presses a recording medium via a toner adhering belt to a belt roller that is stretched around the outer periphery of a toner adhering belt on which toner adheres according to image information. The toner adhering belt and the recording medium are brought into contact with each other on a line connecting the center of the transfer roller that transfers the toner adhering to the toner adhering belt onto the recording medium and the center of the toner adhering belt roller.
作用
本発明は前記した構成により、トナー付着ベルトのベル
ト駆動と記録媒体の搬送とによって機械的振動か生して
も、離接点の移動かなくトナー付着ベルトと記録媒体と
の接触面積を一定に保つことが可能となる。According to the above-described structure, the present invention maintains a constant contact area between the toner adhesion belt and the recording medium without moving the contact/separation point even if mechanical vibration is generated due to the belt drive of the toner adhesion belt and the conveyance of the recording medium. It is possible to keep it.
実施例
第１図は本発明の一実施例における画像形成装置の要部
拡大図である。Embodiment FIG. 1 is an enlarged view of essential parts of an image forming apparatus in an embodiment of the present invention.
第１図において、９は中間転写ベルト、ｌＯは中間転写
駆動ローラー、１２は複写紙、１４はレジストローラー
で、これらは第３図に示した従来例の構成と同しもので
あるので詳細な説明を省略する。In FIG. 1, 9 is an intermediate transfer belt, IO is an intermediate transfer drive roller, 12 is copy paper, and 14 is a registration roller. These are the same configuration as the conventional example shown in FIG. The explanation will be omitted.
ｌ７は転写ローラーであり、この転写ローラー１７は転
写ローラー１７と中間転写駆動ローラーＩＯとの中心を
結ぶ線上において中間転写ベルト９と複写紙１２とが接
する位置に設けられている。17 is a transfer roller, and this transfer roller 17 is provided at a position where the intermediate transfer belt 9 and the copy paper 12 are in contact with each other on a line connecting the centers of the transfer roller 17 and the intermediate transfer drive roller IO.
以上のように構成された画像形成装置について以下その
動作を説明する。The operation of the image forming apparatus configured as described above will be described below.
ここで、複写紙１２の動作以外は、従来のものと同しで
あるので説明を省略する。Here, since the operations other than the operation of the copy paper 12 are the same as those of the conventional system, the explanation will be omitted.
転写ローラー１７により中間転写ベルト９上に付着した
トナーか複写紙Ｉ２へ転写される際、転写ローラー１７
は複写紙１２を中間転写ベルト９の方へ押圧し、かつ転
写ローラー１７を転写ローラー１７と中間転写駆動ロー
ラーＩＯとの中心を結ぶ線上において中間転写ベルト９
と複写紙１２とが接するような位置に設けることにより
、複写紙１２と中間転写ベルト９との離接点か転写ロー
ラー１７により押圧されているため、複写紙１２と中間
転写ベルト９のベルト駆動により機械的振動か生しても
、複写紙１２と中間転写ベルト９との離接点の移動かな
く接触面積を一定に保つことができる。When the toner adhering to the intermediate transfer belt 9 is transferred to the copy paper I2 by the transfer roller 17, the transfer roller 17
presses the copy paper 12 toward the intermediate transfer belt 9, and moves the transfer roller 17 onto the intermediate transfer belt 9 on the line connecting the centers of the transfer roller 17 and the intermediate transfer drive roller IO.
By providing the copy paper 12 at a position where the copy paper 12 is in contact with the intermediate transfer belt 9, the contact/separation point between the copy paper 12 and the intermediate transfer belt 9 is pressed by the transfer roller 17. Even if mechanical vibration occurs, the contact area between the copy paper 12 and the intermediate transfer belt 9 can be kept constant without any movement of the contact and separation points.
発明の効果
以上のように本発明は、画像情報に従いトナーか付着す
るトナー付着ベルトを外周に巻回して張架するベルトロ
ーラーへ記録媒体をトナー付着ベルトを介して押圧し、
トナー付着ベルトに付着したトナーを記録媒体に転写す
る転写ローラーの中心とトナー付着ベルトローラーの中
心とを結ぶ線上においてトナー付着ベルトと記録媒体か
接するようにしたことにより、トナー付着ベルトのベル
ト駆動と記録媒体の搬送とによって機械的振動か生して
も、離接点の移動かなくトナー付着ベルトと記録媒体と
の接触面積を一定に保つことが可能となり、トナー付着
ベルトと記録媒体との接触面積か変化し、画像に濃度ム
ラか発生することを防き画質を向上することができる。Effects of the Invention As described above, the present invention presses a recording medium via a toner adhesion belt to a belt roller which is wound and stretched around the outer periphery of a toner adhesion belt on which toner adheres according to image information.
By making the toner adhesion belt contact the recording medium on the line connecting the center of the transfer roller that transfers the toner adhering to the toner adhesion belt onto the recording medium and the center of the toner adhesion belt roller, the belt drive of the toner adhesion belt is improved. Even if mechanical vibrations occur due to the conveyance of the recording medium, the contact area between the toner adhesion belt and the recording medium can be kept constant without movement of the contact point, and the contact area between the toner adhesion belt and the recording medium can be kept constant. It is possible to prevent density unevenness from occurring in the image and improve the image quality.
第１図は本発明の一実施例における画像形成装置の要部
拡大図、第２図は従来の画像形成装置の概略構成図、第
３図は従来の画像形成装置の要部拡大図である。
１・・・・・・ＯＰＣベルト、２・・・・・・ＯＰｃ駆
動ローラ、３・・・・・・帯電器、４・・・・・・レー
ザ照射器、５，６゜７．８・・・・・・現像器、９・・
・・・・中間転写ベルト、ＩＯ・・・・・・中間転写駆
動ローラー、１１・・・・・・クリーニング器、１２・
・・・・・複写紙、１３・・団・用紙カセット、１４・
・・・・・レジストローラー、１５・・・・・・中間転
写ローラー、１６・・・・・・定着器、１７・・・・・
・転写ローラー、１８・・団・ローラー保持部材。
代理人の氏名 弁理士 粟野重孝 はが１８第
図
中１ｖＳ転写マルト
中間転呼駈動０−５−
複写紙
Ｌシスト０−フ
嶌’１０−ラー
０−５−１ｖ１部君FIG. 1 is an enlarged view of main parts of an image forming apparatus according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a conventional image forming apparatus, and FIG. 3 is an enlarged view of main parts of a conventional image forming apparatus. . 1...OPC belt, 2...OPc drive roller, 3...Charger, 4...Laser irradiator, 5,6°7.8. ...Developer, 9...
... Intermediate transfer belt, IO ... Intermediate transfer drive roller, 11 ... Cleaning device, 12.
...Copy paper, 13. Group paper cassette, 14.
...Registration roller, 15 ...Intermediate transfer roller, 16 ...Fuser, 17 ...
- Transfer roller, 18... Group - Roller holding member. Agent's name Patent attorney Shigetaka Awano Haga 18 Figure 1vS transcription Malt intermediate roll canter 0-5- Copy paper L syst 0-Fushima'10-Lar 0-5-1v1 part-kun
Claims (1)
外周に前記トナー付着ベルトを巻回して張架するベルト
ローラーと、前記トナー付着ベルトに接しながら搬送さ
れる記録媒体と、前記ベルトローラーと共に前記記録媒
体と前記トナー付着ベルトとを挟み前記記録媒体を前記
トナー付着ベルトに押圧し前記トナー付着ベルトに付着
したトナーを前記記録媒体に転写する２個の転写ローラ
ーとを有し、前記ベルトローラーの中心と前記転写ロー
ラーの中心とを結ぶ線上において前記記録媒体と前記ト
ナー付着ベルトとが接するようにしたことを特徴とする
画像形成装置。a toner adhesion belt to which toner adheres according to image information;
A belt roller around which the toner adhesion belt is wound and stretched, a recording medium that is conveyed while being in contact with the toner adhesion belt, and the recording medium is sandwiched between the recording medium and the toner adhesion belt together with the belt roller. two transfer rollers that press the toner adhering belt and transfer the toner adhering to the toner adhering belt to the recording medium, and the recording is performed on a line connecting the center of the belt roller and the center of the transfer roller. An image forming apparatus characterized in that a medium and the toner adhering belt are in contact with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21255890A JPH0497186A (en) | 1990-08-09 | 1990-08-09 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21255890A JPH0497186A (en) | 1990-08-09 | 1990-08-09 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0497186A true JPH0497186A (en) | 1992-03-30 |
Family
ID=16624680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21255890A Pending JPH0497186A (en) | 1990-08-09 | 1990-08-09 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0497186A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5742888A (en) * | 1995-09-27 | 1998-04-21 | Fuji Xerox Co., Ltd. | Transfer apparatus for an image forming apparatus |
| US6301023B1 (en) * | 1998-02-03 | 2001-10-09 | Sharp Kabushiki Kaisha | Image forming apparatus |
-
1990
- 1990-08-09 JP JP21255890A patent/JPH0497186A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5742888A (en) * | 1995-09-27 | 1998-04-21 | Fuji Xerox Co., Ltd. | Transfer apparatus for an image forming apparatus |
| US6301023B1 (en) * | 1998-02-03 | 2001-10-09 | Sharp Kabushiki Kaisha | Image forming apparatus |
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