JPH0270630A - Simple type paper supplying device - Google Patents
Simple type paper supplying deviceInfo
- Publication number
- JPH0270630A JPH0270630A JP63220424A JP22042488A JPH0270630A JP H0270630 A JPH0270630 A JP H0270630A JP 63220424 A JP63220424 A JP 63220424A JP 22042488 A JP22042488 A JP 22042488A JP H0270630 A JPH0270630 A JP H0270630A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- roller
- bending
- paper feeding
- supplying
- 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
- 238000005452 bending Methods 0.000 claims abstract description 10
- 230000002265 prevention Effects 0.000 claims description 35
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000002087 whitening effect Effects 0.000 description 41
- 238000004140 cleaning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 108091008695 photoreceptors Proteins 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、レーザプリンタ等の電子写真式プリンタ、電
子写真式複写機、転写形静電記録式プリンタ等に適用さ
れる簡易型の給紙装置に関し、特に、給紙の際の紙曲が
りを防止した構造の給紙装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to a simple paper feeding method applicable to electrophotographic printers such as laser printers, electrophotographic copying machines, transfer type electrostatic recording printers, etc. The present invention relates to an apparatus, and particularly relates to a paper feeding apparatus having a structure that prevents paper from bending during paper feeding.
例えばレーザプリンタは、一般に、感光体（像担持体）
と、感光体の表面を一様に帯電するための帯電器と、露
光を行って感光体表面に静電像を形成するための露光光
学系と、この静電像をトナーにより現像してトナー像を
形成するための現像器と、このトナー像を転写紙に転写
するための転写器と、転写紙上のトナー像を定着するた
めの定着器と、転写後に感光体に残留したトナーを除去
するクリーニング器とを備えてなる。For example, laser printers generally use a photoreceptor (image carrier)
, a charger for uniformly charging the surface of the photoconductor, an exposure optical system for performing exposure to form an electrostatic image on the surface of the photoconductor, and developing this electrostatic image with toner to produce toner. A developing device for forming an image, a transfer device for transferring this toner image onto transfer paper, a fixing device for fixing the toner image on the transfer paper, and a device for removing toner remaining on the photoreceptor after transfer. It is equipped with a cleaning device.
しかして、良好な画像を形成するためには、転写紙を適
正な姿勢で安定に搬送することが必要とされる。Therefore, in order to form a good image, it is necessary to stably transport the transfer paper in an appropriate posture.
斯かる転写紙を供給するための従来の簡易型の給紙装置
においては、プリンタ本体に、給紙方向とは直角方向に
伸びる回転軸を有する給紙ローラを取付け、この給紙ロ
ーラを転写紙の上面に当接させてその回転摩擦力により
転写紙を搬送するようにしている。In a conventional simple paper feeding device for feeding such transfer paper, a paper feeding roller having a rotating shaft extending perpendicular to the paper feeding direction is attached to the printer body, and this paper feeding roller is used to feed the transfer paper. The transfer paper is conveyed by the rotational frictional force of the transfer paper.
しかし、上記の従来の給紙装置においては、給紙ローラ
による給紙の際に転写紙の曲がりが発生しやすく、その
ため紙詰まり等の搬送不良が発生する問題がある。However, in the above-mentioned conventional paper feeding device, the transfer paper tends to bend when being fed by the paper feeding roller, resulting in problems such as paper jams and other conveyance failures.
このような紙詰まりが生ずると、感光体上のトナー像は
転写されることなくクリーニング工程に付されるため、
クリーニングの負担が増大し、またクリーニングが困難
となり、その結果画像汚れ等の問題が生ずる。When such a paper jam occurs, the toner image on the photoconductor is subjected to the cleaning process without being transferred, so
The burden of cleaning increases and cleaning becomes difficult, resulting in problems such as image stains.
本発明は以上の如き事情に基づいてなされたものであっ
て、その目的は、簡単な構成で紙白がりを防止すること
ができる簡易型の給紙装置を提供することにある。The present invention has been made based on the above-mentioned circumstances, and an object thereof is to provide a simple paper feeding device that can prevent whitening of paper with a simple configuration.
上記目的を達成するため、本発明は、給紙ローラを備え
てなる簡易型の給紙装置において、前記給紙ローラの手
前に、当該給紙ローラの回転軸とほぼ平行な回転軸を有
し、紙の上面に当接して当該紙の移動により従動回転す
る紙白がり防止ローラを設けたことを特徴とする。In order to achieve the above object, the present invention provides a simple paper feeding device including a paper feeding roller, which has a rotating shaft in front of the paper feeding roller that is substantially parallel to the rotating shaft of the paper feeding roller. The present invention is characterized in that a paper whitening prevention roller is provided which contacts the upper surface of the paper and rotates as the paper moves.
また、脱着自在な給紙カセットを備え、紙白がり防止ロ
ーラを、当該給紙カセットの上蓋に当該上蓋から前方に
突出する状態に取付けたことを特徴とする。The present invention is also characterized in that it includes a removable paper feed cassette, and a paper whitening prevention roller is attached to the upper lid of the paper feed cassette in such a manner that it projects forward from the upper lid.
また、脱着自在な給紙カセットを備え、紙白がり防止ロ
ーラを、当該給紙カセットの上蓋の内面に取付けたこと
を特徴とする。The present invention is also characterized in that it includes a removable paper feed cassette, and a paper whitening prevention roller is attached to the inner surface of the upper lid of the paper feed cassette.
紙白がり防止ローラは給紙ローラとほぼ平行な回転軸を
有するので、紙白がり防止ローラによる送り方向は給紙
ローラによる給紙方向と同一である。従って、紙が曲が
らずに給紙方向に供給されているときには、当該紙の移
動により紙白がり防止ローラが円滑に従動回転して当該
紙の姿勢が安定に維持される。Since the paper whitening prevention roller has a rotating shaft that is substantially parallel to the paper feeding roller, the feeding direction by the paper whitening prevention roller is the same as the paper feeding direction by the paper feeding roller. Therefore, when the paper is fed in the paper feeding direction without being bent, the paper whitening prevention roller smoothly rotates due to the movement of the paper, and the posture of the paper is maintained stably.
しかして、何らかの原因で紙白がりが発生しようとする
際には、紙の移動方向が紙白がり防止ローラによる移動
方向から斜めにずれるため、紙は紙白がり防止ローラか
らその回転軸方向に大きな横ずれの摩擦力を受ける。従
って、紙は、紙白がりを阻止する方向に耐えず抵抗を受
けることとなり、その結果、紙白がりが生ぜず、給紙方
向に真っ直ぐに供給されるようになる。However, when paper whitening occurs for some reason, the direction of paper movement deviates diagonally from the direction of movement by the paper whitening prevention roller, so the paper moves away from the paper whitening prevention roller in the direction of its rotation axis. It is subjected to large side-slip friction forces. Therefore, the paper does not resist in the direction of preventing paper whitening, but is subjected to resistance, and as a result, paper whitening does not occur and the paper is fed straight in the paper feeding direction.
また、紙白がり防止ローラを給紙カセットの上蓋に取付
ける場合には、構造が簡単となる。Further, when the paper whitening prevention roller is attached to the upper cover of the paper feed cassette, the structure becomes simple.
以下、本発明の構成を具体的に説明する。 Hereinafter, the configuration of the present invention will be specifically explained.
第１図および第２図は本発明に係る簡易型の給紙装置の
一例を示す概略図である。FIGS. 1 and 2 are schematic diagrams showing an example of a simple paper feeding device according to the present invention.
同図にふいて、ｌＯは給紙ローラ、２０は紙白がり防止
ローラ、３０は給紙カセット、Ｐは紙である。In the figure, IO is a paper feed roller, 20 is a paper whitening prevention roller, 30 is a paper feed cassette, and P is paper.
給紙ローラ１０は、例えばレーザプリンタ等の画像形成
装置本体く図示省略）に取付けられている。The paper feed roller 10 is attached to a main body of an image forming apparatus such as a laser printer (not shown).
この給紙ローラ１０の回転軸１１は紙Ｐの給紙方向Ｑと
はほぼ直角に伸びている。そして、給紙ローラ１０は、
レーザプリンタ等に内蔵された駆動モータにより回転駆
動される。The rotating shaft 11 of the paper feed roller 10 extends substantially perpendicular to the paper feeding direction Q of the paper P. Then, the paper feed roller 10 is
It is rotated by a drive motor built into a laser printer or the like.
紙白がり防止ローラ２０は、給紙ローラ１０の手前に配
置され、その回転軸２１は給紙ローラ１０の回転軸１１
とほぼ平行である。そして、紙白がり防止ローラ２０は
、紙Ｐの上面に当接して当該紙Ｐの移動により従動回転
する構造である。The paper whitening prevention roller 20 is arranged in front of the paper feed roller 10 , and its rotating shaft 21 is similar to the rotating shaft 11 of the paper feeding roller 10 .
is almost parallel to The paper whitening prevention roller 20 has a structure in which it comes into contact with the upper surface of the paper P and rotates as the paper P moves.
この例においては、紙白がり防止ローラ２０は、脱着自
在な給紙カセット３０の上蓋３１に当該上蓋３１から前
方に突出する状態に取付けられている。２２は連結アー
ムであり、連結アーム２２の一端２２Ａは上蓋３１に回
動可能に保持されている。そして、紙白がり防止ローラ
２０は、自重により紙Ｐの上面に当接した状態となって
いる。In this example, the paper whitening prevention roller 20 is attached to an upper lid 31 of a removable paper feed cassette 30 so as to protrude forward from the upper lid 31. 22 is a connecting arm, and one end 22A of the connecting arm 22 is rotatably held by the upper lid 31. The paper whitening prevention roller 20 is in contact with the upper surface of the paper P due to its own weight.
紙白がり防止ローラ２０の材質は、ゴム、プラスチック
等が好ましく、特にゴムによれば、紙Ｐとの適度な摩擦
力により効果的に紙白がりを防止できる。The material of the paper whitening prevention roller 20 is preferably rubber, plastic, etc. In particular, rubber can effectively prevent paper whitening due to a moderate frictional force with the paper P.
給紙カセット３０の上蓋３１は開閉自在となっていて、
紙のセットは、上蓋３１を開いた状態で行われる。上蓋
３１を開いたときには、これに追随して紙白がり防止ロ
ーラ２０も移動するので、紙Ｐをセットする際に障害と
なることはない。The top cover 31 of the paper feed cassette 30 can be opened and closed freely.
Paper is set with the top lid 31 open. When the top cover 31 is opened, the paper whitening prevention roller 20 also moves accordingly, so that it does not become an obstacle when setting the paper P.
以上の構成の装置によれば、給紙ローラ１０が回転され
るとその回転摩擦力により紙Ｐが一枚ずつ給紙方向Ｑに
向かって供給される。According to the apparatus configured as described above, when the paper feed roller 10 is rotated, the paper P is fed one by one in the paper feed direction Q due to its rotational frictional force.
紙Ｐの曲がりが発生していないときには、紙白がり防止
ローラ２０の回転軸２１が給紙ローラ１０の回転軸１１
とほぼ平行であるから、紙Ｐの給紙方向Ｑへの移動に伴
って紙白がり防止ローラ２０は円滑に従動回転する状態
となる。従って、紙Ｐは紙白がり防止ローラ２０から大
きな抵抗を受けることなく給紙方向Ｑへ真っ直ぐに供給
されることとなる。When the paper P is not bent, the rotation shaft 21 of the paper whitening prevention roller 20 is aligned with the rotation shaft 11 of the paper feed roller 10.
Therefore, as the paper P moves in the paper feeding direction Q, the paper whitening prevention roller 20 is in a state of being driven and rotated smoothly. Therefore, the paper P is fed straight in the paper feeding direction Q without receiving a large resistance from the paper whitening prevention roller 20.
しかして、紙Ｐの曲がりが発生しようとするときには、
当該紙Ｐが紙白がり防止ローラ２０の回転軸方向に横ず
れを起こそうとするが、このときは紙白がり防止ローラ
２０と紙Ｐとの間に当該横ずれを阻止する方向に摩擦力
が作用するため、紙Ｐの横ずれが防止され、その結果、
紙Ｐは紙白がりを発生することなく給紙方向Ｑへ真っ直
ぐに供給されるようになる。However, when the paper P is about to bend,
The paper P tries to cause a lateral shift in the direction of the rotation axis of the paper whitening prevention roller 20, but at this time, a frictional force acts between the paper whitening prevention roller 20 and the paper P in a direction to prevent the lateral shift. As a result, the paper P is prevented from shifting laterally, and as a result,
The paper P is now fed straight in the paper feeding direction Q without causing paper whitening.
第３図は、本発明に係る簡易型の給紙装置の他の例を示
す概略図である。FIG. 3 is a schematic diagram showing another example of a simple paper feeding device according to the present invention.
この例においては、紙白がり防止ローラ２０は、連結ア
ーム２２を介して給紙カセット３０の上蓋３１の内面３
２に取付けられている。連結アーム２２の一端２２Ａは
上蓋３１の内面３２に回動可能に保持されている。そし
て、紙白がり防止ローラ２０は、自重により紙Ｐの上面
に当接した状態となっている。In this example, the paper whitening prevention roller 20 is connected to the inner surface of the upper cover 31 of the paper feed cassette 30 via the connecting arm 22.
It is attached to 2. One end 22A of the connecting arm 22 is rotatably held on the inner surface 32 of the upper lid 31. The paper whitening prevention roller 20 is in contact with the upper surface of the paper P due to its own weight.
この例においても、給紙カセット３０の上蓋３１は開閉
自在となっていて、上蓋３１を開いたときには、これに
追随して紙白がり防止ローラ２０も移動するので、紙Ｐ
をセットする際に障害となることはない。In this example as well, the top lid 31 of the paper feed cassette 30 can be opened and closed, and when the top lid 31 is opened, the paper whitening prevention roller 20 also moves accordingly, so that the paper
There is no problem when setting.
斯かる構成の装置によれば、上記と同様にして紙Ｐは紙
白がりを発生することなく給紙方向Ｑへ真っ直ぐに供給
されるようになる。According to the apparatus having such a configuration, the paper P can be fed straight in the paper feeding direction Q without causing paper whitening in the same way as described above.
本発明においては、紙白がり防止ローラ２０の具体的形
態は特に限定されない。例えば−様なローラであっても
よいし、途中に溝が形成されたいわば分割された複数の
小ローラよりなるものであってもよい。In the present invention, the specific form of the paper whitening prevention roller 20 is not particularly limited. For example, it may be a type of roller, or it may be composed of a plurality of divided small rollers with grooves formed in the middle.
また、紙白がり防止ローラ２０の紙Ｐに対する配置位置
は、紙Ｐの中央でもよいし、中央から左右にずれていて
もよい。Further, the position of the paper whitening prevention roller 20 relative to the paper P may be at the center of the paper P, or may be shifted from the center to the left or right.
また、紙白がり防止ローラ２０をスプリング等の弾性部
材により紙Ｐに当接させてもよい。Further, the paper whitening prevention roller 20 may be brought into contact with the paper P using an elastic member such as a spring.
そして、給紙ローラ１０の具体的形態も特に限定されな
い。The specific form of the paper feed roller 10 is also not particularly limited.
以上詳細に説明したように、本発明によれば、給紙ロー
ラの手前に、当該給紙ローラとほぼ平行な回転軸を有し
、紙の上面に当接して当該紙の移動により従動回転する
紙白がり防止ローラを設けたので、紙白がり防止ローラ
の回転軸方向における摩擦力により紙白がりが有効に阻
止される。従って、紙白がりを伴わずに紙を給紙方向に
真っ直ぐに供給することができる。As explained in detail above, according to the present invention, the rotation shaft is provided in front of the paper feed roller and is substantially parallel to the paper feed roller, and the rotating shaft is in contact with the upper surface of the paper and rotates as the paper moves. Since the paper whitening prevention roller is provided, paper whitening is effectively prevented by the frictional force in the direction of the rotation axis of the paper whitening prevention roller. Therefore, paper can be fed straight in the paper feeding direction without paper whitening.
また、紙白がり防止ローラを給紙カセットの上蓋に取付
ける場合には、紙白がり防止ローラの取付構造が簡単と
なる。Further, when the paper whitening prevention roller is attached to the upper lid of the paper feed cassette, the mounting structure of the paper whitening prevention roller becomes simple.
第１図および第２図はそれぞれ本発明に係る簡易型の給
紙装置の一例を示す説明用正面図および平面図、第３図
は本発明に係る簡易型の給紙装置の他の例を示す説明用
正面図である。
１０・・・給紙ローラ １１・・・回転軸２０・
・・紙白がり防止ローラ
２１・・・回転軸 ２２・・・連結アーム３
０・・・給紙カセット３１・・・上蓋３２・・・内面
Ｐ・・・紙Ｑ・・・給紙方向1 and 2 are an explanatory front view and a plan view, respectively, showing an example of a simple paper feeding device according to the present invention, and FIG. 3 is a diagram showing another example of a simple paper feeding device according to the present invention. It is an explanatory front view shown. 10... Paper feed roller 11... Rotating shaft 20.
... Paper whitening prevention roller 21 ... Rotating shaft 22 ... Connection arm 3
0...Paper cassette 31...Top lid 32...Inner surface
P...Paper Q...Paper feeding direction
Claims (3)
て、 前記給紙ローラの手前に、当該給紙ローラの回転軸とほ
ぼ平行な回転軸を有し、紙の上面に当接して当該紙の移
動により従動回転する紙曲がり防止ローラを設けたこと
を特徴とする簡易型の給紙装置。(1) A simple paper feeding device equipped with a paper feeding roller, which has a rotating shaft in front of the paper feeding roller that is substantially parallel to the rotating shaft of the paper feeding roller, and is in contact with the upper surface of the paper. A simple paper feeding device characterized by being provided with a paper bending prevention roller that rotates as the paper moves.
ーラを、当該給紙カセットの上蓋に当該上蓋から前方に
突出する状態に取付けたことを特徴とする請求項１に記
載の簡易型の給紙装置。(2) The simple type according to claim 1, further comprising a removable paper feed cassette, and a paper bending prevention roller attached to the top cover of the paper feed cassette so as to protrude forward from the top cover. Paper feed device.
ーラを、当該給紙カセットの上蓋の内面に取付けたこと
を特徴とする請求項１に記載の簡易型の給紙装置。(3) The simple paper feeding device according to claim 1, further comprising a removable paper feeding cassette, and a paper bending prevention roller attached to the inner surface of an upper lid of the paper feeding cassette.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220424A JPH0270630A (en) | 1988-09-05 | 1988-09-05 | Simple type paper supplying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220424A JPH0270630A (en) | 1988-09-05 | 1988-09-05 | Simple type paper supplying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0270630A true JPH0270630A (en) | 1990-03-09 |
Family
ID=16750897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63220424A Pending JPH0270630A (en) | 1988-09-05 | 1988-09-05 | Simple type paper supplying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0270630A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012008685A2 (en) * | 2010-07-12 | 2012-01-19 | (주) 유니콤티디 | Identifier of confidential printer paper |
-
1988
- 1988-09-05 JP JP63220424A patent/JPH0270630A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012008685A2 (en) * | 2010-07-12 | 2012-01-19 | (주) 유니콤티디 | Identifier of confidential printer paper |
| WO2012008685A3 (en) * | 2010-07-12 | 2012-04-05 | (주) 유니콤티디 | Identifier of confidential printer paper |
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