JPH0725490A - Paper feeding device for printer - Google Patents
Paper feeding device for printerInfo
- Publication number
- JPH0725490A JPH0725490A JP19434693A JP19434693A JPH0725490A JP H0725490 A JPH0725490 A JP H0725490A JP 19434693 A JP19434693 A JP 19434693A JP 19434693 A JP19434693 A JP 19434693A JP H0725490 A JPH0725490 A JP H0725490A
- Authority
- JP
- Japan
- Prior art keywords
- friction belt
- roller
- print medium
- friction
- belt
- 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
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 241001272720 Medialuna californiensis Species 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012840 feeding operation Methods 0.000 description 1
Landscapes
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プリンタ用給紙装置に
係り、とくに比較的小型のプリンタにおけるプリンタ用
給紙装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer paper feeder, and more particularly to a printer paper feeder for a relatively small printer.
【０００２】[0002]
【従来の技術】一般に小型電子写真式プリンタの給紙装
置は、印字媒体の基準をセンタ基準にするか端面基準に
するかにより給紙ローラの構成は変わる。そして、そこ
に使用される給紙ローラとしては、一般に以下の二つの
駆動ローラ方式がある。2. Description of the Related Art Generally, in a paper feeding device of a small electrophotographic printer, the structure of a paper feeding roller is changed depending on whether a print medium is centered or end faced. The paper feed rollers used there are generally the following two drive roller systems.
【０００３】まず、図３乃至図４に示す一方の方式は、
半円筒形状のゴム部５３と該ゴム部５３を内側で保持す
るガイド部材５２とからなる半月ローラを使用する方式
のものである。この方式では、半円筒部分で印字媒体Ｐ
との摩擦力によって当該印字媒体Ｐをレジストローラ５
１Ａ，５１Ｂまで搬送し、しかるのち当該印字媒体Ｐと
は外部に送り出すようになっている（実開平２−９４８
３３号公報）。First, one of the systems shown in FIGS. 3 to 4 is
This is a system using a half-moon roller composed of a semi-cylindrical rubber portion 53 and a guide member 52 holding the rubber portion 53 inside. In this method, the print medium P is formed in the semi-cylindrical portion.
The print medium P is applied to the registration roller 5 by the frictional force with the registration roller 5.
The print medium P is conveyed to 1A and 51B, and then sent out to the outside with the print medium P (actually, Kaihei 2-948).
No. 33 publication).
【０００４】また、図５乃至図６に示す他方の方式は、
円筒形状のピックローラ６２とワンウェイクラッチ６３
を備えた構成となっている。この図５乃至図６に示すも
のは、ある一定回数だけピックローラ６２が回転し、こ
のピックローラ６２と印字媒体Ｐとの摩擦力で当該印字
媒体Ｐをレジストローラ対６１Ａ，６１Ｂまで搬送し、
その後、ワンウェイクラッチ６３の働きによりピックロ
ーラ６２は空回りするようになっている。The other method shown in FIGS. 5 to 6 is
Cylindrical pick roller 62 and one-way clutch 63
It is configured with. 5 to 6, the pick roller 62 rotates a certain number of times, and the print medium P is conveyed to the registration roller pair 61A and 61B by the frictional force between the pick roller 62 and the print medium P.
After that, the pick roller 62 is made to idle by the action of the one-way clutch 63.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記図
３乃至図４に示す方式のものは、半月ローラの孤の長さ
分でしか印字媒体Ｐを搬送することができないため、レ
ジストローラ５１Ａ，５１Ｂと半月ローラ５３の間の距
離が規制されるという不都合があった。However, in the system shown in FIGS. 3 to 4, the printing medium P can be conveyed only by the length of the arc of the half-moon roller, and therefore the registration rollers 51A and 51B. There was an inconvenience that the distance between the half moon roller 53 was restricted.
【０００６】また、上記図３乃至図４に示す方式のもの
は、印字媒体Ｐをレジストローラ６１Ａ，６１Ｂまで搬
送した後のピックローラ６２の空回り状態時には、印字
媒体Ｐとピックローラ６２が摩擦するため、レジストロ
ーラ６１Ａ，６１Ｂのフィード力を大きくしなければな
らず、当該レジストローラ６１Ａ，６１Ｂの負荷が大き
くなるという不都合があった。In the system shown in FIGS. 3 to 4, the print medium P and the pick roller 62 rub when the pick roller 62 is idle after the print medium P is conveyed to the registration rollers 61A and 61B. Therefore, the feed force of the registration rollers 61A and 61B must be increased, and the load on the registration rollers 61A and 61B becomes large.
【０００７】[0007]
【発明の目的】本発明は、かかる従来例の有する不都合
を改善し、とくに印字媒体の搬送距離を大きく採って印
字媒体を確実送り出すと共に、レジストローラの負荷の
軽減を図ったプリンタ用給紙装置を提供することを、そ
の目的とする。SUMMARY OF THE INVENTION An object of the present invention is to improve the disadvantages of the prior art, particularly to reliably feed the print medium with a large print medium conveyance distance, and to reduce the load on the registration rollers. The purpose is to provide.
【０００８】[0008]
【課題を解決するための手段】本発明では、用紙収納部
の印字用紙に沿って配置され，摩擦係数の比較的大きい
素材からなる摩擦ベルトと、この摩擦ベルトを張架する
駆動ローラおよび従動ローラとを備え、この摩擦ベルト
の駆動ローラ側部分が前記用紙の先端部位に当接するよ
うに当該摩擦ベルトを配置すると共に、この摩擦ベルト
の外周囲の一部に、幅が比較的広く且つ前記用紙に当接
しない程度の深さの凹溝を設ける、という構成を採って
いる。これによって前述した目的を達成しようとするも
のである。According to the present invention, a friction belt made of a material having a relatively large friction coefficient, which is arranged along a printing sheet in a sheet storage section, and a driving roller and a driven roller for stretching the friction belt. The friction belt is arranged so that the drive roller side portion of the friction belt comes into contact with the leading end portion of the paper, and the width of the paper is relatively wide and part of the outer periphery of the friction belt. It has a structure in which a groove having a depth that does not come into contact with is provided. This aims to achieve the above-mentioned object.
【０００９】[0009]
【作 用】給紙前は摩擦ベルト４と印字媒体Ｐの接点ａ
の位置に肉厚の薄い部分があるため、印字媒体Ｐと摩擦
ベルト４は接触していない。次に給紙時は駆動ローラ２
がギヤ駆動して摩擦ベルト４の外周長分だけ送るように
回転する。この際、肉厚の厚い部分が接点ａの位置にあ
るときに印字媒体Ｐは摩擦ベルト４と接してその摩擦力
により印字媒体Ｐを給紙する。そして、駆動ローラ２は
摩擦ベルト４の外周長分だけ送るように回転した後に停
止する。[Operation] Contact point a between the friction belt 4 and the print medium P before feeding
The print medium P and the friction belt 4 are not in contact with each other because there is a thin portion at the position. Next, drive roller 2 when feeding
Rotates by gear driving so as to feed only the outer peripheral length of the friction belt 4. At this time, when the thick portion is at the position of the contact point a, the print medium P contacts the friction belt 4 and the print medium P is fed by the frictional force. Then, the drive roller 2 is rotated so as to be fed by the outer peripheral length of the friction belt 4, and then stopped.
【００１０】この時、摩擦ベルト４は給紙前と同様に印
字媒体Ｓと接触しないように、肉厚の薄い部分が接点ａ
の位置にある状態で停止制御される。よって、印字媒体
Ｐは摩擦ベルト４と接触せず、従って、摩擦ベルト４の
回転停止時に当該摩擦ベルト４と印字媒体Ｐとの間に摩
擦力が生じることがなくなり、レジストローラ１Ａ，１
Ｂの負担が確実に少なくなる。At this time, the friction belt 4 has a contact portion a at its thin portion so that the friction belt 4 does not come into contact with the print medium S as before feeding.
Stop control is performed in the state of. Therefore, the print medium P does not come into contact with the friction belt 4, and therefore, when the rotation of the friction belt 4 is stopped, a frictional force is not generated between the friction belt 4 and the print medium P, and the registration rollers 1A, 1A.
The burden on B is surely reduced.
【００１１】[0011]
【実施例】以下、本発明の一実施例を図１乃至図２に基
づいて説明する。この図１乃至図２に示す実施例は、用
紙収納部５の印字媒体Ｐに沿って配置され，摩擦係数の
比較的大きい素材からなる摩擦ベルト４と、この摩擦ベ
ルト４を張架する駆動ローラ２および従動ローラ３とを
備えている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The embodiment shown in FIGS. 1 and 2 is arranged along the print medium P in the paper storage unit 5 and is made of a material having a relatively large friction coefficient, and a driving roller for stretching the friction belt 4. 2 and a driven roller 3.
【００１２】摩擦ベルト４の駆動ローラ２側部分は、印
字媒体Ｐの先端部位に当接するように当該摩擦ベルト４
が配置されている。この摩擦ベルト４の外周囲の一部
に、幅Ｌが比較的広く且つ印字媒体Ｐに当接しない程度
の深さの凹溝４Ａが設けられている。The portion of the friction belt 4 on the drive roller 2 side is in contact with the leading end portion of the print medium P.
Are arranged. A concave groove 4A having a relatively large width L and a depth that does not contact the print medium P is provided in a part of the outer periphery of the friction belt 4.
【００１３】また、駆動ローラ２は歯車状に形成され、
摩擦ベルト４は前述した駆動ローラ２に噛合する凹凸を
備えた段付きベルトが使用されている。The drive roller 2 is formed in a gear shape,
As the friction belt 4, a stepped belt having unevenness that meshes with the drive roller 2 is used.
【００１４】これを更に詳述すると、図１において、印
字媒体Ｐと偏肉ベルトである摩擦ベルト４の接点ａから
印字媒体Ｐとレジストローラ１Ａ，１Ｂの接点ｂまでの
距離をＬ、斜行を補正するためレジストローラ１Ａ，１
Ｂに印字媒体Ｐが付き当たった後に摩擦ベルト４が印字
媒体Ｐを搬送する量をαとする。摩擦ベルト４において
肉厚が薄い部分の外周の長さをＳとすると、駆動ローラ
２は前述したように軸に平行な凹溝４Ａを有し、ギヤ駆
動により１枚の印字媒体Ｐを搬送し、そして搬送前の状
態に戻る。More specifically, in FIG. 1, the distance from the contact point a between the print medium P and the friction belt 4 which is an uneven thickness belt to the contact point b between the print medium P and the registration rollers 1A and 1B is L, and the sheet is skewed. Registration rollers 1A, 1
The amount that the friction belt 4 conveys the print medium P after the print medium P hits B is α. Assuming that the outer peripheral length of the thin portion of the friction belt 4 is S, the drive roller 2 has the concave groove 4A parallel to the axis as described above, and conveys one print medium P by gear drive. , And returns to the state before transportation.
【００１５】このため、摩擦ベルト４の外周長により
「Ｌ＋Ｓ＋α」だけ送るように回転する。摩擦ベルト４
は「Ｌ＋Ｓ＋α」の外周長を有し、段付きべるとである
ことから肉厚の厚い部分と薄い部分を有し、そして駆動
ローラ２の凹溝４Ａとかみ合う。従動ローラ３は摩擦ベ
ルト４の溝にかみあう溝を有し、摩擦ベルト４に従動す
る。For this reason, the friction belt 4 rotates so as to feed "L + S + α" depending on the outer peripheral length. Friction belt 4
Has an outer peripheral length of “L + S + α”, and has a thick portion and a thin portion because it is stepped, and engages with the concave groove 4A of the drive roller 2. The driven roller 3 has a groove that engages with the groove of the friction belt 4, and follows the friction belt 4.
【００１６】そして、まず給紙前は図１のように摩擦ベ
ルト４と印字媒体Ｐの接点ａの位置に肉厚の薄い部分が
あるため、印字媒体Ｐと摩擦ベルト４は接触していな
い。次に給紙時は駆動ローラ２がギヤ駆動して摩擦ベル
ト４の外周長分「Ｌ＋Ｓ＋α」だけ送るように回転す
る。この際、肉厚の厚い部分が接点ａの位置にあるとき
に印字媒体Ｐは摩擦ベルト４と接してその摩擦力により
印字媒体Ｐを給紙する。そして、駆動ローラ２は摩擦ベ
ルト４の外周長「Ｌ＋Ｓ＋α」だけ送るように回転した
後に停止する。Before the paper is fed, the print medium P and the friction belt 4 are not in contact with each other because there is a thin portion at the position of the contact point a between the friction belt 4 and the print medium P as shown in FIG. Next, at the time of paper feeding, the drive roller 2 is gear-driven to rotate so as to feed "L + S + α" by the outer peripheral length of the friction belt 4. At this time, when the thick portion is at the position of the contact point a, the print medium P contacts the friction belt 4 and the print medium P is fed by the frictional force. Then, the drive roller 2 rotates so as to feed the outer peripheral length “L + S + α” of the friction belt 4 and then stops.
【００１７】この時、摩擦ベルト４は給紙前と同様に印
字媒体Ｓと接触しないように、肉厚の薄い部分が接点ａ
の位置にある状態で停止制御される。よって、印字媒体
Ｐは摩擦ベルト４と接触せず、従って、摩擦ベルト４の
回転停止時に当該摩擦ベルト４と印字媒体Ｐとの間に摩
擦力が生じることがなくなり、レジストローラ１Ａ，１
Ｂの負担が確実に少なくなる。At this time, the friction belt 4 has a contact portion a with a thin portion so that the friction belt 4 does not come into contact with the print medium S as before feeding.
Stop control is performed in the state of. Therefore, the print medium P does not come into contact with the friction belt 4, and therefore, when the rotation of the friction belt 4 is stopped, a frictional force is not generated between the friction belt 4 and the print medium P, and the registration rollers 1A, 1A.
The burden on B is surely reduced.
【００１８】[0018]
【発明の効果】以上のように本発明によると、摩擦ベル
トの外周面の一部に設けられた凹溝の作用により摩擦ベ
ルトの回転休止時に当該摩擦ベルトと印字媒体との間に
摩擦力が生じることがなくなったので、この摩擦ベルト
の回転休止時におけるレジストローラ対への負荷を著し
く少なくすることができ、従って電力消費を軽減するこ
とができ、同時に摩擦ベルトの長さを予め任意に設定す
ることが可能であるため、ピック部とレジストローラま
での距離を比較的自由に設定することができ、従って印
字媒体の給紙動作を確実に行うことができるという従来
にない優れた信頼性の高いプリンタ用給紙装置を提供す
ることができる。As described above, according to the present invention, the frictional force is generated between the friction belt and the print medium when the rotation of the friction belt is stopped due to the action of the groove provided in a part of the outer peripheral surface of the friction belt. Since it does not occur, the load on the registration roller pair when the rotation of the friction belt is stopped can be remarkably reduced, and therefore the power consumption can be reduced, and at the same time, the length of the friction belt can be set in advance arbitrarily. Since it is possible to set the distance between the pick section and the registration roller relatively freely, it is possible to reliably carry out the feeding operation of the print medium, which is an unprecedented reliability. It is possible to provide a high-priced paper feeder.
【図１】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】図１の動作を示す説明図である。FIG. 2 is an explanatory diagram showing the operation of FIG.
【図３】従来例を示す説明図である。FIG. 3 is an explanatory diagram showing a conventional example.
【図４】図３の動作を示す説明図である。FIG. 4 is an explanatory diagram showing the operation of FIG.
【図５】他の従来例を示す説明図である。FIG. 5 is an explanatory diagram showing another conventional example.
【図６】図５の動作を示す説明図である。FIG. 6 is an explanatory diagram showing the operation of FIG.
１Ａ，１Ｂ レジストローラ ２ 駆動ローラ ３ 従動ローラ ４ 摩擦ベルト ４Ａ 凹溝 ５ 用紙収納部 Ｐ 印字媒体 1A, 1B Registration roller 2 Drive roller 3 Driven roller 4 Friction belt 4A Groove 5 Paper storage part P Print medium
Claims (2)
擦係数の比較的大きい素材からなる摩擦ベルトと、この
摩擦ベルトを張架する駆動ローラおよび従動ローラとを
備え、 前記摩擦ベルトの駆動ローラ側部分が前記用紙の先端部
位に当接するように当該摩擦ベルトを配置すると共に、
この摩擦ベルトの外周囲の一部に、幅が比較的広く且つ
前記用紙に当接しない程度の深さの凹溝を設けたことを
特徴とするプリンタ用給紙装置。1. A friction belt, which is arranged along a sheet in a sheet storage section and is made of a material having a relatively large friction coefficient, and a driving roller and a driven roller for stretching the friction belt. While arranging the friction belt so that the roller side portion contacts the leading end portion of the paper,
A paper feeding device for a printer, characterized in that a concave groove having a relatively wide width and having a depth that does not come into contact with the paper is provided in a part of an outer periphery of the friction belt.
に、これに対応して前記摩擦ベルトの内側に、前記駆動
ローラに噛合する凹凸を設けたことを特徴とする請求項
１記載のプリンタ用給紙装置。2. The printer according to claim 1, wherein the drive roller is formed in a gear shape, and correspondingly, an inner surface of the friction belt is provided with irregularities that mesh with the drive roller. Paper feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19434693A JPH0725490A (en) | 1993-07-09 | 1993-07-09 | Paper feeding device for printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19434693A JPH0725490A (en) | 1993-07-09 | 1993-07-09 | Paper feeding device for printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0725490A true JPH0725490A (en) | 1995-01-27 |
Family
ID=16323059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19434693A Pending JPH0725490A (en) | 1993-07-09 | 1993-07-09 | Paper feeding device for printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0725490A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09110212A (en) * | 1995-10-17 | 1997-04-28 | Kyowa Denshi Kogyo Kk | Thin plate-like body delivery device |
| US10183822B2 (en) | 2016-10-27 | 2019-01-22 | Canon Kabushiki Kaisha | Sheet feeding unit, sheet feeding apparatus including sheet feeding unit, and image forming apparatus including sheet feeding apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937241B2 (en) * | 1976-01-13 | 1984-09-08 | 株式会社クボタ | Transmission case protection structure |
-
1993
- 1993-07-09 JP JP19434693A patent/JPH0725490A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937241B2 (en) * | 1976-01-13 | 1984-09-08 | 株式会社クボタ | Transmission case protection structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09110212A (en) * | 1995-10-17 | 1997-04-28 | Kyowa Denshi Kogyo Kk | Thin plate-like body delivery device |
| US10183822B2 (en) | 2016-10-27 | 2019-01-22 | Canon Kabushiki Kaisha | Sheet feeding unit, sheet feeding apparatus including sheet feeding unit, and image forming apparatus including sheet feeding apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19960206 |