JPH04146456A - Electrophotographic recorder - Google Patents
Electrophotographic recorderInfo
- Publication number
- JPH04146456A JPH04146456A JP2269956A JP26995690A JPH04146456A JP H04146456 A JPH04146456 A JP H04146456A JP 2269956 A JP2269956 A JP 2269956A JP 26995690 A JP26995690 A JP 26995690A JP H04146456 A JPH04146456 A JP H04146456A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sheet
- rib
- roller
- separation roller
- 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
- 238000000926 separation method Methods 0.000 abstract description 17
- 230000015556 catabolic process Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000032258 transport Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Fixing For Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電子写真記録装置に関し、特に感光体により形
成されたトナー像を転写する転写プロセスから定着プロ
セスまでの用紙搬送路と用紙との接触面積を減らしてト
ナー像の飛散を避けた電子写真記録装置に間する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrophotographic recording device, and in particular, the present invention relates to an electrophotographic recording device, and in particular, the contact between the paper conveyance path and the paper from the transfer process of transferring a toner image formed by a photoreceptor to the fixing process. To reduce the area and avoid scattering of toner images in an electrophotographic recording device.
従来、この種の電子写真記録装置では転写プロセスから
定着プロセスまでの用紙搬送路には、用紙搬送を安定さ
せかつ未定着のトナー像をみださないためにできる限り
用紙との接触面積を減らす目的で、用紙搬送方向と平行
かつほぼ等間隔に複数本のリブを一体に形成した樹脂製
の用紙ガイドが一般に使用されている。Conventionally, in this type of electrophotographic recording device, the contact area with the paper has been reduced as much as possible in the paper transport path from the transfer process to the fixing process in order to stabilize paper transport and prevent unfixed toner images from appearing. For this purpose, a resin paper guide is generally used in which a plurality of ribs are integrally formed parallel to the paper transport direction and at approximately equal intervals.
上述した従来の用紙ガイドは、転写後未定着の用紙を定
着プロセスに搬送する分離ローラと平行する位置に設け
られている。そして、未定着の用紙は、一端の印刷領域
外を分離ローラで挾持され用紙ガイドのリブ上に接触し
ながら定着プロセスに搬送されるのであるが、分離ロー
ラの用紙搬送面より用紙ガイドのリブの位置が高いと進
入してきた用紙がリブ面と強く接触し未定着のトナー像
が飛散してしまうため、分離ローラの用紙搬送面を用紙
ガイドのりブ面より高くしておく必要がある。しかしな
がら、従来はこの用紙ガイドに用いられた多くのリブは
、分離ローラ位置より低く設定されてはいるが全て均一
の高さに作られていたため、腰の弱い巾広の用紙では分
離ローラの近くで屈曲しやすくこの部分でのトナーの飛
散を招きやすいという欠点があった。The conventional paper guide described above is provided at a position parallel to the separation roller that transports the unfixed paper after transfer to the fixing process. The unfixed paper is then conveyed to the fixing process by being held by a separation roller outside the printing area at one end and in contact with the ribs of the paper guide. If the position is high, the incoming paper will come into strong contact with the rib surface and the unfixed toner image will scatter, so it is necessary to make the paper conveyance surface of the separation roller higher than the paper guide sliding surface. However, in the past, the many ribs used in this paper guide were all set at a uniform height, although they were set lower than the separation roller position. This has the disadvantage that it is easy to bend at this point, which tends to cause toner scattering.
本発明の電子写真記録装置は、感光ドラム上に形成した
静電潜像を記憶紙上に転写させ、転写部から定着部まで
の記録紙搬送路に用紙背面を沿わせて案内する用紙ガイ
ドを有する電子写真記録装置において、用紙ガイド上に
用紙搬送路と平行に複数本設けた用紙ガイドのリブの高
さを数段階に分けて用紙搬送ローラ端からあらかじめ定
められた本数について漸次低く形成して構成される。The electrophotographic recording device of the present invention has a paper guide that transfers an electrostatic latent image formed on a photosensitive drum onto a storage paper and guides the paper along a recording paper transport path from a transfer section to a fixing section. In an electrophotographic recording device, a plurality of paper guide ribs are provided on the paper guide parallel to the paper transport path, and the height of the ribs is divided into several stages, and the ribs are gradually lowered by a predetermined number from the end of the paper transport roller. be done.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の構成を示す斜視図、第２図
（ａ）および（ｂ）はそれぞれ本実施例の正面図および
断面図、第３図は本実施例の用紙搬送系に関する概念図
である。FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention, FIGS. 2(a) and (b) are a front view and a sectional view of this embodiment, respectively, and FIG. 3 is a paper conveyance system of this embodiment. It is a conceptual diagram regarding.
まず本発明を適用する用紙の搬送について説明する。First, conveyance of paper to which the present invention is applied will be explained.
第３図において８は感光ドラム、９は転写帯電器である
。感光トラム８で形成された静電潜像は、転写帯電器９
により進入してきた用紙７に転写され、用紙７にトナー
像を形成する。さらに用紙７は、感光ドラム８からはく
離され印刷領域外である端部を分離ローラ３とプレッシ
ャローラ４により挟持され用紙ガイド１に沿って２番目
のローラである分離ローラ１０．プレッシャローラ１１
を経て定着部１２へ搬送される。In FIG. 3, 8 is a photosensitive drum, and 9 is a transfer charger. The electrostatic latent image formed by the photosensitive tram 8 is transferred to a transfer charger 9
The toner image is transferred onto the paper 7 that has entered the paper 7, thereby forming a toner image on the paper 7. Further, the paper 7 is separated from the photosensitive drum 8 and the end portion outside the printing area is held between the separation roller 3 and the pressure roller 4, and is moved along the paper guide 1 to the separation roller 10, which is the second roller. Pressure roller 11
The image is conveyed to the fixing section 12 through the.
しかし、転写を終えた用紙７は定着部１２による定着を
完了するまでの間、トナー像を静電気力だけで保持して
いるだけの状態であるため用紙ガイド１との接触面積及
び接触面圧はでき得る限り小さくする必要がある。この
ため、用紙ガイド１上には、第２図に示したように多く
のリブ２ａ〜２ｘを設けている。またリブ２ａ〜２Ｘは
用紙７との接触によるトナー像の飛散を極力抑えるため
に分離ローラ３とプレッシャローラ４、プレッシャロー
ラ６の圧接部より低い位置になるように形成することが
必要とされる。しかしながらこれでは分離ローラ３に近
い側で用紙７が屈曲する結果、この部分でのトナーの飛
散を招き画像品質の低下を生しやすい。However, after the transfer, the paper 7 is in a state where the toner image is only held by electrostatic force until the fixing by the fixing unit 12 is completed, so the contact area and contact surface pressure with the paper guide 1 are small. It needs to be made as small as possible. For this reason, many ribs 2a to 2x are provided on the paper guide 1, as shown in FIG. Furthermore, in order to minimize scattering of toner images due to contact with the paper 7, the ribs 2a to 2X need to be formed at positions lower than the pressure contact portions of the separation roller 3, pressure roller 4, and pressure roller 6. . However, in this case, the paper 7 is bent on the side closer to the separation roller 3, and as a result, the toner is likely to scatter at this portion, resulting in a decrease in image quality.
このため本発明では、第１図に示すように分離ローラ３
のすぐ後方にあるリブ２ａを、用紙搬送ローラの片側を
形成する分離ローラ３とプレッシャローラ４との圧接部
および分離ローラ１０とプレッシャローラ１１との圧接
部と同じ高さに形成し、次にリブ２ｂをリブ２ａより若
干低く、以下リブ２ｃ、リブ２ｄ、リブ２ｅの順に低く
なるように形成し、リブ２ｅからリブ２Ｘまでを同じ高
さとしている。このリブ高さの設定は使用する用紙種類
、用紙厚、用紙中等の諸条件により適正値が異なるため
、試験により個々の電子写真記録装置に最適な設定をす
ることが必要となるが、概ね第１図に示したように、用
紙７は各リブ面とのなだらかな接触を得ることにより、
トナー像（潜像）の飛散をおさえることができる。Therefore, in the present invention, as shown in FIG.
The rib 2a immediately behind is formed at the same height as the pressure contact portion between the separation roller 3 and the pressure roller 4 and the pressure contact portion between the separation roller 10 and the pressure roller 11, which form one side of the paper transport roller, and then The rib 2b is formed to be slightly lower than the rib 2a, and then the rib 2c, the rib 2d, and the rib 2e are formed to be lower in this order, and the height from the rib 2e to the rib 2X is the same. The appropriate value for setting the rib height differs depending on the paper type, paper thickness, and various conditions of the paper used, so it is necessary to determine the optimal setting for each electrophotographic recording device through testing. As shown in Figure 1, the paper 7 is brought into gentle contact with each rib surface.
Scattering of the toner image (latent image) can be suppressed.
なお、第２図（ｂ）では区別を明確にするため、リブ２
ａ〜２Ｘと用紙７とは離しである。In addition, in Fig. 2(b), to make the distinction clear, rib 2
A to 2X and paper 7 are separated.
以上説明したように本発明は、用紙ガイドのリブ面の高
さを数段に分けて変化させることで極端な用紙の屈曲や
ある一部のリブと強い接触を避けることができ、これに
より生じるトナー像の飛散による画像品質の低下を防止
できるという効果がある。As explained above, in the present invention, by changing the height of the rib surface of the paper guide in several stages, it is possible to avoid extreme bending of the paper and strong contact with a certain part of the ribs. This has the effect of preventing deterioration in image quality due to toner image scattering.
第１図は本発明の一実施例の構成を示す斜視図、第２図
（ａ）および（ｂ）はそれぞれ本実施例の平面図および
断面図、第３図は本実施例の用紙搬送系に関する概念図
。
１・・・用紙ガイド、２ａ〜２ｘ・・・リブ、３・・・
分離ローラ、４・・・プレッシャローラ、６・・・プレ
ッシャローラ、７・・・用紙、８・・・感光ドラム、９
・・・転写帯ローラ、７・・・用紙、８・・・感光ドラ
ム、９・・・転写帯電器、１０・・・分離ローラ、１１
・・・プレッシャローラ、１２・・定着部。FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention, FIGS. 2(a) and (b) are a plan view and a sectional view of this embodiment, respectively, and FIG. 3 is a paper conveyance system of this embodiment. Conceptual diagram regarding. 1...paper guide, 2a-2x...rib, 3...
Separation roller, 4... Pressure roller, 6... Pressure roller, 7... Paper, 8... Photosensitive drum, 9
... Transfer band roller, 7... Paper, 8... Photosensitive drum, 9... Transfer charger, 10... Separation roller, 11
...Pressure roller, 12...Fixing section.
Claims (1)
、転写部から定着部までの記録紙搬送路に用紙背面を沿
わせて案内する用紙ガイドを有する電子写真記録装置に
おいて、用紙ガイド上に用紙搬送路と平行に複数本設け
た用紙ガイドのリブの高さを数段階に分けて用紙搬送ロ
ーラ端からあらかじめ定められた本数について漸次低く
形成して成ることを特徴とする電子写真記録装置。In an electrophotographic recording device that has a paper guide that transfers an electrostatic latent image formed on a photosensitive drum onto a storage paper and guides the paper along the recording paper transport path from a transfer unit to a fixing unit, An electrophotographic recording device characterized in that the height of the ribs of a plurality of paper guides provided parallel to a paper transport path is divided into several stages, and the ribs are gradually lowered by a predetermined number from the end of the paper transport roller. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2269956A JPH04146456A (en) | 1990-10-08 | 1990-10-08 | Electrophotographic recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2269956A JPH04146456A (en) | 1990-10-08 | 1990-10-08 | Electrophotographic recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04146456A true JPH04146456A (en) | 1992-05-20 |
Family
ID=17479561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2269956A Pending JPH04146456A (en) | 1990-10-08 | 1990-10-08 | Electrophotographic recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04146456A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6149045A (en) * | 1995-04-26 | 2000-11-21 | Toshiba Tec Kabushiki Kaisha | Paper sheet supplying apparatus having a raised central region for preventing a paper sheet from skewing as the sheet is fed |
| US9098045B2 (en) | 2013-06-21 | 2015-08-04 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
| JP2017040706A (en) * | 2015-08-18 | 2017-02-23 | 富士ゼロックス株式会社 | Sheet conveyance device and image forming apparatus |
-
1990
- 1990-10-08 JP JP2269956A patent/JPH04146456A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6149045A (en) * | 1995-04-26 | 2000-11-21 | Toshiba Tec Kabushiki Kaisha | Paper sheet supplying apparatus having a raised central region for preventing a paper sheet from skewing as the sheet is fed |
| US9098045B2 (en) | 2013-06-21 | 2015-08-04 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
| JP2017040706A (en) * | 2015-08-18 | 2017-02-23 | 富士ゼロックス株式会社 | Sheet conveyance device and image forming apparatus |
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