JPH06336357A - Paper correcting mechanism for electrophotographic device - Google Patents
Paper correcting mechanism for electrophotographic deviceInfo
- Publication number
- JPH06336357A JPH06336357A JP5126994A JP12699493A JPH06336357A JP H06336357 A JPH06336357 A JP H06336357A JP 5126994 A JP5126994 A JP 5126994A JP 12699493 A JP12699493 A JP 12699493A JP H06336357 A JPH06336357 A JP H06336357A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- pressure contact
- printing paper
- electrophotographic apparatus
- paper
- 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.)
- Withdrawn
Links
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Paper Feeding For Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真装置の用紙矯
正機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet straightening mechanism for an electrophotographic apparatus.
【０００２】[0002]
【従来の技術】所定の間隔で設けられたミシン目などに
沿って交互に折りたたまれた長尺に連続した印刷用紙を
扱う電子写真装置が従来より知られているが、この種の
印刷用紙を用いる電子写真装置においては、ミシン目
（折りたたみ部分）近傍に生じた折りたたみ癖や用紙設
置場所の環境条件（温度、湿度）により印刷用紙面に生
じたしわ等の局部的な凹凸をなくして印刷用紙面を修復
した後、感光ドラム側（転写位置）へ印刷用紙を送り込
むようにする配慮がなされていなかった。2. Description of the Related Art An electrophotographic apparatus that handles a long continuous printing paper that is alternately folded along perforations provided at predetermined intervals has been known in the past. In the electrophotographic apparatus used, the printing paper is formed by eliminating the local unevenness such as wrinkles on the printing paper surface due to the folding tendency generated near the perforations (folding portion) and the environmental conditions (temperature, humidity) of the paper installation place. After repairing the surface, no consideration was given to feeding the printing paper to the photosensitive drum side (transfer position).
【０００３】[0003]
【発明が解決しようとする問題点】このため、凹凸のま
ま印刷用紙が転写位置へ送り込まれた場合、感光ドラム
表面及び印刷用紙表面間の転写距離が、印刷用紙が平ら
な場合と凸凹の場合とで異なり、凸凹箇所では転写効率
の低下をまねき、印刷画像が欠落するなどといった印刷
品質の低下を引き起こしていた。Therefore, when the printing paper is fed to the transfer position with unevenness, the transfer distance between the photosensitive drum surface and the printing paper surface is flat or uneven. In contrast, the unevenness causes a decrease in transfer efficiency, which causes a decrease in print quality such as a missing print image.
【０００４】本発明の目的は、印刷用紙の局部的な凹凸
箇所によってもたらされる転写不良をなくし、常に安定
した印刷品質を保つことのできる電子写真装置を提供す
ることにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an electrophotographic apparatus capable of eliminating a transfer failure caused by a local uneven portion of a printing paper and always maintaining stable print quality.
【０００５】[0005]
【問題点を解決するための手段】上記目的を達成するた
めに本発明の電子写真装置の用紙矯正機構においては、
転写器に対し用紙搬送方向上流側に、印刷用紙面を平坦
化させる用紙圧接手段を設けた。In order to achieve the above object, the sheet straightening mechanism of the electrophotographic apparatus of the present invention comprises:
A paper pressing means for flattening the printing paper surface was provided upstream of the transfer device in the paper transport direction.
【０００６】[0006]
【作用】上記のように構成された電子写真装置の用紙矯
正機構によると、転写位置前段において印刷用紙面に生
じた局部的な凹凸をなくし、印刷用紙面を平らに修復し
た後、転写位置へ印刷用紙が送り込まれるので、感光ド
ラム表面及び印刷用紙表面間の転写距離にばらつきがな
くなり、転写不良の生じない常に安定した印刷品質を保
つことのできる電子写真装置を提供することが可能とな
る。According to the paper straightening mechanism of the electrophotographic apparatus configured as described above, the local unevenness generated on the printing paper surface in the preceding stage of the transfer position is eliminated, the printing paper surface is restored to the flat surface, and then the printing paper is transferred to the transfer position. Since the printing paper is fed, the transfer distance between the surface of the photosensitive drum and the surface of the printing paper does not vary, and it is possible to provide an electrophotographic apparatus capable of always maintaining stable print quality without causing transfer failure.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面を参照しながら
説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１は本発明となる用紙矯正機構を備えた
電子写真装置の要部を示す概略構成図、図２は本発明と
なる用紙矯正機構の概略構成図である。FIG. 1 is a schematic configuration diagram showing a main part of an electrophotographic apparatus provided with a sheet correction mechanism according to the present invention, and FIG. 2 is a schematic configuration diagram of the sheet correction mechanism according to the present invention.
【０００９】図１において符号１は感光ドラムであり、
例えば矢印ａ方向へ回転駆動されている。感光ドラム１
表面に対向して設けられた転写器２は、感光ドラム１表
面に形成されたトナー像３を、感光ドラム１及び転写器
２間を走行される印刷用紙４に静電的に吸着し、印刷用
紙４上にトナー像３を形成する。In FIG. 1, reference numeral 1 is a photosensitive drum,
For example, it is rotationally driven in the direction of arrow a. Photosensitive drum 1
The transfer device 2 provided so as to face the surface electrostatically attracts the toner image 3 formed on the surface of the photosensitive drum 1 to a printing paper 4 that runs between the photosensitive drum 1 and the transfer device 2 to print the image. The toner image 3 is formed on the sheet 4.
【００１０】印刷用紙４は、転写器２の前段及び後段位
置に設けられたトラクタ機構５、６に架け渡され矢印ｂ
方向へ搬送される。The printing paper 4 is stretched over the tractor mechanisms 5 and 6 provided at the front and rear positions of the transfer device 2, and is indicated by the arrow b.
Is conveyed in the direction.
【００１１】トラクタ機構５、６は、例えばサーボモー
タにより駆動され、感光ドラム１の周速と同一速度を保
ちながら印刷用紙４を搬送するようにフィードバック制
御される。The tractor mechanisms 5 and 6 are driven by, for example, servomotors, and are feedback-controlled so as to convey the printing paper 4 while maintaining the same speed as the peripheral speed of the photosensitive drum 1.
【００１２】符号７はリトラクタであり、リトラクタ７
には転写器２が取り付けられており、図示しないリンク
機構により感光ドラム１表面に対し進退可能に構成され
ている。 用紙圧接手段８は、トラクタ機構５に対し用
紙搬送方向上流側に設けられており、一対の圧接ローラ
８ａ、８ｂにより構成されている。Reference numeral 7 is a retractor, and the retractor 7
A transfer unit 2 is attached to the transfer unit 2 and is configured to be movable back and forth with respect to the surface of the photosensitive drum 1 by a link mechanism (not shown). The sheet pressure contact unit 8 is provided on the upstream side of the tractor mechanism 5 in the sheet conveyance direction, and includes a pair of pressure contact rollers 8a and 8b.
【００１３】圧接ローラ８ａは図２に示すように圧接ロ
ーラ８ｂが支持された支持部材９に対しピン１０を支点
に回動自在に設けられた支持部材１１に支持されてお
り、支持部材９及び支持部材１１間に掛け渡されたばね
１２の弾性力により圧接ローラ８ａを圧接ローラ８ｂ側
へ当接させるように規制している。As shown in FIG. 2, the pressure contact roller 8a is supported by a support member 11 rotatably provided around a pin 10 with respect to a support member 9 on which the pressure contact roller 8b is supported. The elastic force of the spring 12 stretched between the support members 11 regulates the pressure contact roller 8a so as to contact the pressure contact roller 8b.
【００１４】支持部材１１に設けられた突出部１１ａ下
部には、偏心カム１３が当接しており、偏心カム１３に
取り付けられた操作レバー１４を回動操作することによ
り圧接ローラ８ａ、８ｂの接触または非接触状態が形成
される。An eccentric cam 13 is in contact with a lower portion of the protrusion 11a provided on the support member 11, and the operation lever 14 attached to the eccentric cam 13 is rotated to contact the pressure contact rollers 8a and 8b. Alternatively, a non-contact state is formed.
【００１５】なお、図１において符号１５は用紙案内部
材である。In FIG. 1, reference numeral 15 is a paper guide member.
【００１６】上記のように構成された用紙矯正機構を備
えた電子写真装置によれば、印刷用紙４を圧接ローラ８
ａ、８ｂ間でしごき、用紙しわ等の局部的な凹凸を転写
位置前段で除去し、印刷用紙４表面を平らに修復した
後、転写位置へ印刷用紙４を送り込むので、感光ドラム
１表面及び印刷用紙４表面間の転写距離のばらつきがな
くなる。According to the electrophotographic apparatus having the sheet straightening mechanism constructed as described above, the printing sheet 4 is pressed against the press roller 8
Local irregularities such as ironing and paper wrinkles between a and 8b are removed before the transfer position to restore the surface of the printing paper 4 to a flat surface, and then the printing paper 4 is fed to the transfer position. There is no variation in the transfer distance between the surfaces of the paper 4.
【００１７】また、圧接ローラの少なくとも一方を弾性
体により構成してもよく、例えば図３に示すように弾性
体で構成した圧接ローラ８１ａを、その軸心方向に対し
クラウン状に形成すれば、圧接ローラ８１ａの形状及び
弾性変形により印刷用紙４を用紙幅方向へ引き伸ばそう
とする力が作用し、より平坦、平滑な用紙表面が得られ
る。At least one of the pressure contact rollers may be made of an elastic body. For example, as shown in FIG. 3, if the pressure contact roller 81a made of an elastic body is formed in a crown shape in the axial direction, Due to the shape and elastic deformation of the pressure roller 81a, a force to stretch the printing paper 4 in the paper width direction acts, and a flatter and smoother paper surface is obtained.
【００１８】また、圧接ローラ対の数は一対に限らず、
適宜複数対設けてもよい。図４には圧接ローラ対を二対
設けた場合の構成を示している。The number of pressure contact roller pairs is not limited to one,
Plural pairs may be provided as appropriate. FIG. 4 shows a configuration in which two pairs of pressure contact rollers are provided.
【００１９】なお、圧接ローラの設け方としては、図１
に示すように圧接ローラ対を構成する２本のローラ８
ａ、８ｂの軸心を結ぶ線Ａに対し、印刷用紙面がほぼ直
角をなして圧接ローラ対のニップ部へ送り込まれるよう
にしてもよいが、図４に示すように軸心を結ぶ線Ｂに対
し、印刷用紙面が鋭角θをなして圧接ローラ対のニップ
部へ送り込まれるようにすれば、印刷用紙４に対する摩
擦力が増加し、印刷用紙４のしわ４ａ等の局部的な凹凸
をより効率よく取り除くことが可能となる。As a method of providing the pressure contact roller, FIG.
Two rollers 8 forming a pressure roller pair as shown in FIG.
The surface of the printing paper may be fed to the nip portion of the pressure contact roller pair at a right angle to the line A connecting the axes of a and 8b, but as shown in FIG. On the other hand, if the printing paper surface is made to form an acute angle θ and is fed into the nip portion of the pressure contact roller pair, the frictional force on the printing paper 4 increases and local unevenness such as wrinkles 4a of the printing paper 4 is further increased. It can be removed efficiently.
【００２０】さらに、上記実施例の説明においては、用
紙圧接手段８をトラクタ機構５に対し用紙搬送方向上流
側に設けた場合を例示したが、用紙圧接手段８の設置箇
所はこれに限定されず、用紙圧接手段８を転写器２とト
ラクタ機構５の間に設けた場合でも同様の作用効果が得
られる。Further, in the above description of the embodiment, the case where the paper pressure contact means 8 is provided upstream of the tractor mechanism 5 in the paper transport direction is illustrated, but the location of the paper pressure contact means 8 is not limited to this. Even when the paper pressure contact means 8 is provided between the transfer device 2 and the tractor mechanism 5, the same effect can be obtained.
【００２１】[0021]
【発明の効果】以上説明したように本発明によれば、感
光体表面に対向して設けられた転写器により、前記感光
体表面に形成されたトナー像を感光体及び転写器間を走
行する印刷用紙へ静電的に吸着させる電子写真装置にお
いて、前記転写器に対し用紙搬送方向上流側に、印刷用
紙面を平坦化させる用紙圧接手段を設け、転写位置前段
において印刷用紙面に生じた局部的な凹凸をなくし、印
刷用紙面を平らに修復した後、転写位置へ印刷用紙を送
り込むようにしたので、感光ドラム表面及び印刷用紙表
面間の転写距離にばらつきがなくなり、転写不良の生じ
ない常に安定した印刷品質を保つことのできる電子写真
装置を提供することができる。As described above, according to the present invention, the toner image formed on the surface of the photoconductor is caused to travel between the photoconductor and the transfer device by the transfer device provided so as to face the surface of the photoconductor. In an electrophotographic apparatus for electrostatically adhering to a printing paper, a paper pressure contact means for flattening the printing paper surface is provided on the upstream side of the transfer device in the paper conveyance direction, and a local portion generated on the printing paper surface in the preceding stage of the transfer position. Since the printing paper is fed to the transfer position after the printing paper surface has been restored to a flat surface by eliminating the irregularities, the transfer distance between the photosensitive drum surface and the printing paper surface does not vary, and there is no transfer failure. It is possible to provide an electrophotographic apparatus capable of maintaining stable print quality.
【図１】 本発明となる用紙矯正機構を備えた電子写真
装置の要部概略構成図である。FIG. 1 is a schematic configuration diagram of a main part of an electrophotographic apparatus including a sheet correction mechanism according to the present invention.
【図２】 本発明となる用紙矯正機構の概略構成図であ
る。FIG. 2 is a schematic configuration diagram of a sheet straightening mechanism according to the present invention.
【図３】 本発明の他の実施例を示す要部斜視図であ
る。FIG. 3 is a perspective view of an essential part showing another embodiment of the present invention.
【図４】 本発明の他の実施例を示す要部概略構成図で
ある。FIG. 4 is a schematic configuration diagram of a main part showing another embodiment of the present invention.
１は感光ドラム、２は転写器、８は用紙圧接手段であ
る。Reference numeral 1 is a photosensitive drum, 2 is a transfer device, and 8 is a paper pressure contact means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 横川 秀穂 茨城県勝田市武田1060番地 日立工機株式 会社内 (72)発明者 高橋 國友 茨城県勝田市武田1060番地 日立工機株式 会社内 (72)発明者 澤畑 昌 茨城県勝田市武田1060番地 日立工機株式 会社内 (72)発明者 白田 宏 茨城県勝田市武田1060番地 日立工機株式 会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideho Yokokawa, 1060 Takeda, Katsuta, Ibaraki, Hitachi Koki Co., Ltd. (72) Inventor, Kunito Takahashi, 1060, Takeda, Katsuta, Ibaraki, Hitachi, Ltd. ) Inventor Masa Sawahata 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd. (72) Inventor Hiroshi Shirota 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd.
Claims (6)
により、前記感光体表面に形成されたトナー像を感光体
及び転写器間を走行する印刷用紙へ静電的に吸着させる
電子写真装置において、前記転写器に対し用紙搬送方向
上流側に、印刷用紙面を平坦化させる用紙圧接手段を設
けたことを特徴とする電子写真装置の用紙矯正機構。1. An electrophotographic apparatus which electrostatically adsorbs a toner image formed on the surface of the photoconductor to a printing paper running between the photoconductor and the transfer unit by a transfer unit provided so as to face the surface of the photoconductor. In the apparatus, a sheet pressing mechanism for flattening a printing sheet surface is provided on the upstream side of the transfer device in the sheet conveying direction, and a sheet correcting mechanism for an electrophotographic apparatus.
ーラにより構成したことを特徴とする請求項１記載の電
子写真装置の用紙矯正機構。2. The sheet correcting mechanism for an electrophotographic apparatus according to claim 1, wherein the sheet pressure contact means is constituted by a pair of sheet pressure contact rollers.
ローラにより構成したことを特徴とする請求項１記載の
電子写真装置の用紙矯正機構。3. The sheet correcting mechanism for an electrophotographic apparatus according to claim 1, wherein the sheet pressure contact means is constituted by a plurality of pairs of sheet pressure contact rollers.
ローラの軸心を結ぶ線に対し、印刷用紙面が鋭角をなし
て前記用紙圧接ローラ対のニップ部へ送り込まれること
を特徴とする請求項２または３記載の電子写真装置の用
紙矯正機構。4. The printing paper surface is fed to the nip portion of the paper pressure contact roller pair at an acute angle with respect to the line connecting the axes of the two rollers forming the paper pressure contact roller pair. A sheet straightening mechanism of the electrophotographic apparatus according to claim 2.
弾性体により構成したことを特徴とする請求項２または
３記載の電子写真装置の用紙矯正機構。5. The sheet correcting mechanism for an electrophotographic apparatus according to claim 2, wherein at least one of the sheet pressure contact rollers is made of an elastic material.
ーラは、その軸心方向に対しクラウン状に形成されてい
ることを特徴とする請求項５記載の電子写真装置の用紙
矯正機構。6. The sheet straightening mechanism of an electrophotographic apparatus according to claim 5, wherein the sheet pressure contact roller made of the elastic body is formed in a crown shape with respect to an axial direction thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5126994A JPH06336357A (en) | 1993-05-28 | 1993-05-28 | Paper correcting mechanism for electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5126994A JPH06336357A (en) | 1993-05-28 | 1993-05-28 | Paper correcting mechanism for electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06336357A true JPH06336357A (en) | 1994-12-06 |
Family
ID=14949036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5126994A Withdrawn JPH06336357A (en) | 1993-05-28 | 1993-05-28 | Paper correcting mechanism for electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06336357A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011042436A (en) * | 2009-08-19 | 2011-03-03 | Toyota Motor Corp | Web carrying device and web carrying method |
-
1993
- 1993-05-28 JP JP5126994A patent/JPH06336357A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011042436A (en) * | 2009-08-19 | 2011-03-03 | Toyota Motor Corp | Web carrying device and web carrying method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000801 |