JPH02230274A - Electrophotographic printer - Google Patents
Electrophotographic printerInfo
- Publication number
- JPH02230274A JPH02230274A JP5163389A JP5163389A JPH02230274A JP H02230274 A JPH02230274 A JP H02230274A JP 5163389 A JP5163389 A JP 5163389A JP 5163389 A JP5163389 A JP 5163389A JP H02230274 A JPH02230274 A JP H02230274A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- guide plate
- transfer
- photoreceptor
- image
- 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
- 108091008695 photoreceptors Proteins 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Handling Of Cut Paper (AREA)
- 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〕
本発明は電子写真方式のプリンタに関する．〔従来の技
術〕
従来、この種の電子写真方式のプリンタにおける転写部
のガイドプレートは記録媒体に関係なく、感光体より一
定位置に固定されている．〔発明が解決しようとする課
題〕
上述した従来のガイドプレートは固定されているので、
記録蝶体がガイドプレート上を走行し、感光体に接触す
る際、記録媒体の剛性により接触圧が異なる．そのため
、剛性の小さい薄い記録媒体では充分な接触圧が得られ
ず、転写不良を起こす．また、剛性の高い厚い記録媒体
では記録媒体の先端が強い力で感光体に接触することと
なり、高い接触圧のために感光体表面が傷つき、感光体
の使用寿命が低下するという欠点がある．本発明の目的
は前記課題を解決した電子写真方式のプリンタを提供す
ることにある．
〔課題を解決するための手段〕
前記目的を達成するため、本発明は画像形成用感光体か
ら記録媒体に画像を転写する転写部を備えた電子写真方
式のプリンタにおいて、転写部に、記録媒体を感光体に
押し付けるガイドプレートを有し、さらに記録媒体の剛
性を測定するｔｌ！ｌ横と、該測定機楕からの出力信号
を受けて前記ガイドプレートの記録媒体に対する加圧力
を調整する撮構とを有するものである．
〔実施例〕
次に本発明について図面を参照して説明する．第１図は
本発明の一実施例を示す構成図である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrophotographic printer. [Prior Art] Conventionally, the guide plate of the transfer section in this type of electrophotographic printer has been fixed at a fixed position relative to the photoreceptor, regardless of the recording medium. [Problem to be solved by the invention] Since the conventional guide plate described above is fixed,
When the recording butterfly travels on the guide plate and contacts the photoreceptor, the contact pressure varies depending on the rigidity of the recording medium. Therefore, with thin recording media with low rigidity, sufficient contact pressure cannot be obtained, causing transfer defects. In addition, in the case of a thick recording medium with high rigidity, the leading edge of the recording medium comes into contact with the photoreceptor with a strong force, and the high contact pressure damages the surface of the photoreceptor, resulting in a shortened service life of the photoreceptor. An object of the present invention is to provide an electrophotographic printer that solves the above problems. [Means for Solving the Problems] In order to achieve the above object, the present invention provides an electrophotographic printer equipped with a transfer section that transfers an image from an image forming photoreceptor to a recording medium. It has a guide plate that presses the tl! against the photoreceptor, and also measures the rigidity of the recording medium. 1 side, and a photographing mechanism that adjusts the pressing force of the guide plate against the recording medium in response to an output signal from the measuring device ellipse. [Example] Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
図において、感光体１の周りに露光器９、帯電器８、現
像器１４、転写器１１、クリーナユニット７、イレーサ
ランプ６、及びガイドプレー１−２が配置されている４
ガイドプレート２にはギヤがついており、ギャ４ａ，４
ｂ，４ｃとともにギヤ列をなしており、駆動源としてモ
ータ５が配されている，また、ガイドグレート２の位置
の検田用と１７て、センサ３が配されている．
走行系のホッパ一部にはベーバーカセット１９カ配され
、その中に記録媒体１３が貯蔵されており、記録媒体１
３をピックするためビックローラ１８が配され、その直
後に圧ｔ素子１７が配される．記録媒体の搬送用として
フィードローラ１６ａ． １（ｉｂが配され、転写部１
１の直＾１！にタイミングローラ１０ａ，１０ｂが配さ
れている．
次に印字動作を順を追って説明する、
帯電器８により、感光体１の表面はーに帯電される．そ
の後、露光部９により露光され、怒光体１の表面に潜像
が形成される．またこれとは別に、記録ＩＪｉ．体１３
はピックローラ１８によりベーパカセット１９より搬出
されて圧電素子１７に至る．ここで、圧電素子１７は記
録媒体１３より圧力を受ける．この圧力は記録媒体１３
の剛性と間数関係にある．記録媒体１３はフィードロー
ラ１６ａ ， １６ｂにより搬送される．タイミングロ
ーラ１０ａ， ｉｏｂは感光体１上の潜促と記録ａ体１
３とのタイミングを合わして、回転する．搬送される記
録媒体１３がガイドプレート２と感光体１の間に１受入
する前に記録ａ体１３の則性、厚さに応じた前記圧電素
子１７からの出力が制御回路２０に入力され、この制御
回路２０によりモータ５が回転し、ギヤ列を伝わり、ガ
イドプレート２が移動する．この移動によりガイドブレ
ー１−２は走行している記ｌｉｊ：Ｘ体１３を適切な圧
力で感光体１に押し付ける．ここで、記録媒体１３は転
写器１１によりトナーと逆極性に帯電され、感光体１」
−の現像が転写される．記録媒体１３は搬送ベルｌ・１
２により運ばれ、ヒーターにより加熱されたヒートロー
ラとプレッシャーローラより構成される図示しない定着
器を通りトナーが定着され、定着後矢印１５方向に搬送
されてスタック部にスタックされる．
一方、転写後の感光体１の表面には、未転写トナーが付
着しており、クリーナユニット７でがき落とし、回収タ
ンクに収納される．その後、イレーサランプ６により、
次の帯電のために感光体１の表面の残留電位が消去され
る．
〔発明の効果〕
以上説明したよう本発明は記録蝶体の閘性に基いて記録
媒体の感光体に対する加圧力を調整するため、転写部で
良好な画像の転写を行うことができる効果を有する．In the figure, an exposure device 9, a charger 8, a developer 14, a transfer device 11, a cleaner unit 7, an eraser lamp 6, and a guide plate 1-2 are arranged around a photoreceptor 1. It has gears, gears 4a, 4
b and 4c form a gear train, and a motor 5 is disposed as a drive source.A sensor 3 is also disposed for field inspection at the position of the guide grate 2. 19 Baber cassettes are arranged in a part of the hopper of the traveling system, and recording media 13 are stored therein.
A big roller 18 is arranged to pick up the number 3, and a pressure t-element 17 is arranged immediately after it. A feed roller 16a for conveying the recording medium. 1 (ib is arranged, transfer section 1
1 direct^1! Timing rollers 10a and 10b are arranged. Next, the printing operation will be explained step by step.The surface of the photoreceptor 1 is charged to - by the charger 8. Thereafter, it is exposed to light by the exposure unit 9, and a latent image is formed on the surface of the photoluminescent body 1. Apart from this, the record IJi. body 13
is carried out from the vapor cassette 19 by the pick roller 18 and reaches the piezoelectric element 17. Here, the piezoelectric element 17 receives pressure from the recording medium 13. This pressure is the recording medium 13
There is a relationship between the stiffness and the number. The recording medium 13 is conveyed by feed rollers 16a and 16b. Timing rollers 10a and iob are used for lurking and recording on the photoreceptor 1.
Rotate in time with 3. Before the conveyed recording medium 13 is received between the guide plate 2 and the photoreceptor 1, the output from the piezoelectric element 17 corresponding to the regularity and thickness of the recording medium 13 is input to the control circuit 20, This control circuit 20 causes the motor 5 to rotate, which is transmitted through the gear train, and the guide plate 2 is moved. Due to this movement, the guide brake 1-2 presses the traveling body 13 against the photoconductor 1 with appropriate pressure. Here, the recording medium 13 is charged with a polarity opposite to that of the toner by the transfer device 11, and the photoreceptor 1''
The development of - is transferred. The recording medium 13 is conveyed by conveyor bell l.1.
2, the toner is fixed through a fixing device (not shown) consisting of a heat roller and a pressure roller heated by a heater, and after fixing, the toner is conveyed in the direction of arrow 15 and stacked in a stack section. On the other hand, untransferred toner adheres to the surface of the photoreceptor 1 after the transfer, and is scraped off by the cleaner unit 7 and stored in a recovery tank. After that, the eraser lamp 6
The residual potential on the surface of the photoreceptor 1 is erased for the next charging. [Effects of the Invention] As explained above, the present invention has the effect of being able to perform good image transfer at the transfer section because the pressure force applied to the photoreceptor of the recording medium is adjusted based on the locking properties of the recording body. ．．
第１図は本発明の一実施例を示す横成図である．１・・
・感光体 ２・・・ガイドプレート３・・・
センサ
４ ａ ， ４ ｂ， ４ ｃ ・＝ギャ５・・・モー
タ ６・・・イレーサランプ７・・・クリー
ナユニット
８・・・Ｓ電器 ９・・・露光器１０ａ ，
１０ｂ・・・タイミングローラ１１・・・転写器
１２・・・搬送ベルト１３・・・記録媒体
１４・・・現像器１６ａ，１６ｂ・・・フィード
ローラ
１７・・・圧電素子 １８・・・ビックローラ
１９・・・ペーパーカセットFigure 1 is a horizontal diagram showing an embodiment of the present invention. 1...
・Photoreceptor 2...Guide plate 3...
Sensors 4a, 4b, 4c = Gear 5...Motor 6...Eraser lamp 7...Cleaner unit 8...S electric appliance 9...Exposure device 10a,
10b...timing roller 11...transfer device
12... Conveyor belt 13... Recording medium
14...Developing device 16a, 16b...Feed roller 17...Piezoelectric element 18...Bick roller 19...Paper cassette
Claims (1)
転写部を備えた電子写真方式のプリンタにおいて、転写
部に、記録媒体を感光体に押し付けるガイドプレートを
有し、さらに記録媒体の剛性を測定する機構と、該測定
機構からの出力信号を受けて前記ガイドプレートの記録
媒体に対する加圧力を調整する機構とを有することを特
徴とする電子写真方式のプリンタ。(1) In an electrophotographic printer equipped with a transfer section that transfers an image from an image forming photoreceptor to a recording medium, the transfer section has a guide plate that presses the recording medium against the photoreceptor, and furthermore, the rigidity of the recording medium is 1. An electrophotographic printer, comprising: a mechanism for measuring the pressure of the guide plate; and a mechanism for adjusting the pressing force of the guide plate against the recording medium in response to an output signal from the measuring mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5163389A JPH02230274A (en) | 1989-03-03 | 1989-03-03 | Electrophotographic printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5163389A JPH02230274A (en) | 1989-03-03 | 1989-03-03 | Electrophotographic printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02230274A true JPH02230274A (en) | 1990-09-12 |
Family
ID=12892248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5163389A Pending JPH02230274A (en) | 1989-03-03 | 1989-03-03 | Electrophotographic printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02230274A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138885A (en) * | 1990-03-16 | 1992-08-18 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric-type pressure sensor |
-
1989
- 1989-03-03 JP JP5163389A patent/JPH02230274A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138885A (en) * | 1990-03-16 | 1992-08-18 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric-type pressure sensor |
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