JPH0331130A - Sheet feeding mechanism - Google Patents

Sheet feeding mechanism

Info

Publication number
JPH0331130A
JPH0331130A JP16816089A JP16816089A JPH0331130A JP H0331130 A JPH0331130 A JP H0331130A JP 16816089 A JP16816089 A JP 16816089A JP 16816089 A JP16816089 A JP 16816089A JP H0331130 A JPH0331130 A JP H0331130A
Authority
JP
Japan
Prior art keywords
cam
gear
paper
feed roller
arrow
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
Application number
JP16816089A
Other languages
Japanese (ja)
Inventor
Ryosuke Uematsu
上松 良介
Kazuhiko Konishi
小西 和彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, NEC Engineering Ltd filed Critical NEC Corp
Priority to JP16816089A priority Critical patent/JPH0331130A/en
Publication of JPH0331130A publication Critical patent/JPH0331130A/en
Pending legal-status Critical Current

Links

Landscapes

  • Handling Of Cut Paper (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

PURPOSE:To improve operability at the time of sheet feeding by providing a planetary gear coupled with a cam shaft to drive a cam pressing and releasing a paper plate, and providing a one-way clutch coupled with a partially notched cam gear, a sheet feed roller and a manual insertion roller respectively. CONSTITUTION:A motor gear 5 is rotated in the arrow (a) direction at the time of sheet feeding. A sheet feed roller gear 9 starts to be rotated in the arrow (a) direction and a sheet feed roller 1 starts to be rotated in the arrow (b) direction by a gear train. The first planetary gear 3 is engaged with a cam gear 2 by the rotation of the sheet feed gear 9, thus the cam gear 2 and a cam 6 are rotated in the arrow (c) direction. The depression of a paper plate 7 is released by the rotation of the cam 6, the paper plate 7 is pushed up by a paper plate depressing spring 13, thus sheets 8 are pressed to the sheet feed roller 1, and sheet feeding is started. The cam gear 2 is released from the first planetary gear 3 by a notch at the position where the cam 6 releases the depression.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はプリンタ等の給紙機構に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a paper feeding mechanism for a printer or the like.

〔従来の技術〕[Conventional technology]

従来、この種の給紙機構において、第6図および第7図
を参照して説明する。
A conventional paper feeding mechanism of this type will be described with reference to FIGS. 6 and 7.

第6図は従来の一例を示す給紙機構の側面図である。FIG. 6 is a side view of a conventional paper feeding mechanism.

第6図に示すように、従来の給紙機構は用紙8を載置し
たペーパプレート7が給紙ローラ1に対して押し上げバ
ネ13により常時押しつけられているため、用紙を補給
する場合、操作者がレバー等によりペーパプレート7を
押し下げる必要がある。尚、14は分離摩擦部材である
。従って、かかる給紙機構は操作性においてかなり面倒
である。
As shown in FIG. 6, in the conventional paper feed mechanism, the paper plate 7 on which the paper 8 is placed is constantly pressed against the paper feed roller 1 by the push-up spring 13. It is necessary to push down the paper plate 7 using a lever or the like. Note that 14 is a separation friction member. Therefore, such a paper feeding mechanism is quite cumbersome in terms of operability.

第7図は従来の他の例を示す給紙機構の側面図である。FIG. 7 is a side view of another conventional paper feeding mechanism.

第7図に示すように、かかる給紙機構は前述した第6図
の従来例の解決策として用いられるものであり、これに
よると、給紙ローラ1とカムギヤ2等で結合されたカム
6により給紙ローラ1の回転に同期して用紙8を載置し
たペーパプレート7を押し下げるようにしている。すな
わち、給紙終了時には、ペーパプレート7を下がった状
態にして用紙8の補給を可能としている。尚、9は給紙
ローラギヤ、13はペーパープレート押上げバネ、14
は分離摩擦部材である。
As shown in FIG. 7, this paper feeding mechanism is used as a solution to the conventional example shown in FIG. The paper plate 7 on which the paper 8 is placed is pushed down in synchronization with the rotation of the paper feed roller 1. That is, at the end of paper feeding, the paper plate 7 is lowered to allow the paper 8 to be replenished. In addition, 9 is a paper feed roller gear, 13 is a paper plate push-up spring, and 14
is a separation friction member.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の給紙機構は、第7図に示すように給紙ロ
ーラ1とカム6が結合されているため、給紙ローラ1の
回転角は一定になってしまう。すなわち給紙ローラ1の
回転角はカム6が1回転する間の回転角で決定され、常
に一定の給紙送り量となる。しかしながら、実際には給
紙する用紙の条件等の違いにより、一定の給紙ローラ回
転角では給紙送り量が一定とはならず、そのため印字タ
イミングのずれ等の不具合を生ずるという欠点が多々あ
る。
In the conventional paper feeding mechanism described above, the paper feeding roller 1 and the cam 6 are coupled as shown in FIG. 7, so that the rotation angle of the paper feeding roller 1 is constant. That is, the rotation angle of the paper feed roller 1 is determined by the rotation angle during one rotation of the cam 6, and the paper feed amount is always constant. However, in reality, due to differences in the conditions of the paper to be fed, the amount of paper feed is not constant at a constant rotation angle of the paper feed roller, which has many drawbacks such as problems such as printing timing shifts. .

本発明の目的は、かかる用紙給紙時の操作性の向上と、
印字タイミングがずれたりしない正確な用紙送りとを実
現することのできる給紙機構を提供することにある。
The purpose of the present invention is to improve the operability during paper feeding, and
To provide a paper feeding mechanism capable of realizing accurate paper feeding without shifting print timing.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の給紙機構は給紙ローラの軸に結合された第一の
ワンウェイクラッチと、二枚の連結された遊星ギヤを有
し且つ前記給紙コーラの軸に結合された給紙ローラギヤ
と、用紙を載置するペーパプレートを上下させるカムと
、前記カムの軸に結合され且つ一部を切り欠いたカムギ
ヤと、手差しローラに結合された第二のワンウェイクラ
ッチと、前記給紙ローラ、カムおよび手差しローラ等を
駆動するモータとを有して構成される。
The paper feed mechanism of the present invention includes: a first one-way clutch coupled to the shaft of the paper feed roller; a paper feed roller gear having two connected planetary gears and coupled to the shaft of the paper feed cola; a cam that moves up and down a paper plate on which paper is placed; a cam gear that is coupled to the shaft of the cam and has a portion cut out; a second one-way clutch that is coupled to the manual feed roller; the paper feed roller, the cam, and It is configured with a motor that drives a manual feed roller and the like.

〔実施例〕〔Example〕

次に、本発明の実施例について図面を参照して説明する
Next, embodiments of the present invention will be described with reference to the drawings.

第1図は本発明の一実施例を示す給紙機構の斜視図であ
る。
FIG. 1 is a perspective view of a paper feeding mechanism showing an embodiment of the present invention.

第1図に示すように、本実施例は給紙モータ軸上のモー
タギア5により給紙ローラ1と手差し用ローラ10とが
駆動される。これらの給紙ローラ1と手差し用ローラ1
0の各々の軸にはワンウェイクラッチ11.12がそれ
ぞれ組込まれており、給紙モータの回転方向により駆動
されるローラが切換わる構成となっている。また、給紙
ローラ1の軸に結合された給紙ローラギヤ9には2つの
遊星ギヤ3,4が備えられ、この給紙ローラギヤ9の回
転方向により第一の遊星ギヤ3はカムギヤ2に且つ第二
の遊星ギヤ4はカムアイドルギヤにかみ合い、カム60
回転方向を常に一定にしている。
As shown in FIG. 1, in this embodiment, a paper feed roller 1 and a manual feed roller 10 are driven by a motor gear 5 on a paper feed motor shaft. These paper feed roller 1 and manual feed roller 1
One-way clutches 11 and 12 are incorporated in each of the shafts, and the rollers driven by the paper feed motor are switched depending on the rotational direction of the paper feed motor. Further, the paper feed roller gear 9 coupled to the shaft of the paper feed roller 1 is provided with two planet gears 3 and 4, and depending on the rotational direction of the paper feed roller gear 9, the first planet gear 3 is connected to the cam gear 2 and the first planet gear 3 is connected to the cam gear 2. The second planetary gear 4 meshes with the cam idle gear, and the cam 60
The direction of rotation is always constant.

更に、カムギヤ2の一部は切り欠いており、第一の遊星
ギヤ3またはカムアイドルギヤとのかみ合いがはずれる
ようになっている。このカム6は用紙8を載置するペー
パプレート7を上下させ、ヘーハフレート7上の用紙8
を給紙ローラ1に押圧および解除するように構成してい
る。
Furthermore, a portion of the cam gear 2 is cut out so that it can be disengaged from the first planetary gear 3 or the cam idle gear. This cam 6 moves up and down the paper plate 7 on which the paper 8 is placed, and
is configured to be pressed against and released from the paper feed roller 1.

第2図乃至第5図はそれぞれ第1図に示す給紙機構の一
連の動作を説明するための側面図である。
2 to 5 are side views for explaining a series of operations of the paper feeding mechanism shown in FIG. 1, respectively.

第2図は給紙機構の停止時の状態を示し、ペーパプレー
ト7はカム6により押し下げられており、用紙8の補給
を容易に行うことができる。給紙時、モータギヤ5は矢
印aの方向に回転する。ギヤ列により給紙ローラギヤ9
は矢印dの方向に、また給紙ローラ1は矢印すの方向に
回転を始める。この給紙ローラギヤ9の回転により第一
の遊星ギヤー5.、”S 3はカムギヤ2にかみ合い、したがってカムギヤ2及び
カム6は矢印Cの方向へ回転する。このカム6の回転に
よりペーパプレート7の押下げが解除され、ペーパプレ
ート押上げバネ13によりペーパプレート7を押上げる
ので用紙8が給紙ローラ1に押圧され、給紙が開始され
る。一方、カムギヤ2はカム6が押下げを解除した後の
位置で切り欠きにより第一の遊星ギヤ3とのかみ合いが
解除される。尚、14は分離摩擦部材、15はカムアイ
ドルギヤである。
FIG. 2 shows the state when the paper feeding mechanism is stopped, and the paper plate 7 is pushed down by the cam 6, so that paper 8 can be easily replenished. When feeding paper, the motor gear 5 rotates in the direction of arrow a. Paper feed roller gear 9 by gear train
starts rotating in the direction of arrow d, and the paper feed roller 1 starts rotating in the direction of arrow s. This rotation of the paper feed roller gear 9 causes the first planetary gear 5. , "S 3 meshes with the cam gear 2, so the cam gear 2 and the cam 6 rotate in the direction of arrow C. This rotation of the cam 6 releases the paper plate 7 from being pressed down, and the paper plate push-up spring 13 pushes the paper plate upward. 7 is pushed up, the paper 8 is pressed against the paper feed roller 1, and paper feeding starts.On the other hand, the cam gear 2 is connected to the first planetary gear 3 by a notch at the position after the cam 6 releases its push. The meshing is released. Note that 14 is a separation friction member and 15 is a cam idle gear.

第3図はカムギヤが遊星ギヤからはずれた状態を示し、
この状態では給紙ローラ1の回転のみであり、カム6は
圧力を解除したまま回転を行なわない。従って、給紙ロ
ーラ1の回転角度は以降自由であり、図示しないセンサ
等によりタイミングをとり、次段のローラへ送り込むこ
とができる。
Figure 3 shows the cam gear separated from the planetary gear.
In this state, only the paper feed roller 1 rotates, and the cam 6 does not rotate while the pressure is released. Therefore, the rotation angle of the paper feed roller 1 is free from now on, and the paper can be fed to the next roller by timing with a sensor (not shown) or the like.

尚、16は給紙された用紙を表わす。Note that 16 represents the fed paper.

第4図はかかる給紙された用紙16が次段のローラに送
り込まれた状態を示し、この場合にはモータギヤ5は矢
印Gの方向に回転する。このと6 き、給紙ローラギヤ9は矢印eの方向に回転するが、ワ
ンウェイクラッチ11により給紙ローラ1は駆動されな
い。また、この給紙ローラギヤ9の回転により第二の遊
星ギヤ4がカムアイドルギヤ15にかみ合い、カムギヤ
2及びカム6を矢印Cの方向に回転させ始める。このカ
ム6の回転によりペーパプレート7が押下げられ、用紙
8は給紙ローラ1からはなれる。また、カムギヤ2はカ
ム6がペーパプレート7を押下げた位置で切り欠きによ
ってカムアイドルギヤ15とのかみ合いがはずれる。
FIG. 4 shows a state in which the fed paper 16 is fed to the next roller, and in this case, the motor gear 5 rotates in the direction of arrow G. At this time, the paper feed roller gear 9 rotates in the direction of arrow e, but the one-way clutch 11 does not drive the paper feed roller 1. Further, due to the rotation of the paper feed roller gear 9, the second planetary gear 4 meshes with the cam idle gear 15, and the cam gear 2 and the cam 6 begin to rotate in the direction of arrow C. This rotation of the cam 6 pushes down the paper plate 7, and the paper 8 is separated from the paper feed roller 1. Further, the cam gear 2 is disengaged from the cam idle gear 15 due to the notch at the position where the cam 6 pushes down the paper plate 7.

第5図はこのカムギヤ2とカムアイドルギヤ15とのか
み合いが解除された状態を示し、これによって−回の給
紙動作を終了する。すなわち、給紙動作によりカム6が
解除され、しかる後給紙が開始され、給紙後モータを一
定量以上逆転させることによりカム6がペーパプレート
7を押下げて停止する。
FIG. 5 shows a state in which the cam gear 2 and the cam idle gear 15 are disengaged, thereby completing the -th sheet feeding operation. That is, the cam 6 is released by the paper feeding operation, after which paper feeding is started, and the cam 6 pushes down the paper plate 7 and stops by rotating the motor in the reverse direction by a certain amount or more after feeding the paper.

上述した第2図または第5図の状態が停止時の状態を示
し、この状態から手差し給紙を行なう場合は、モータギ
ヤ5を矢印Gの方向に回転させ、手差し用ローラ10を
矢印fの方向に回転させれば、手差給紙が行なえる。こ
の場合、ワンウェイクラッチ11とカムギヤ2の切欠き
とにより、給紙ローラ1及びカム6は回転しない。
The state shown in FIG. 2 or 5 above shows the state when the paper is stopped, and when manually feeding paper from this state, the motor gear 5 is rotated in the direction of arrow G, and the manual feed roller 10 is rotated in the direction of arrow f. If you rotate it, you can manually feed paper. In this case, due to the one-way clutch 11 and the notch in the cam gear 2, the paper feed roller 1 and the cam 6 do not rotate.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の給紙機構は、ペーパプレ
ートを押圧および解除するカムと、このカムを駆動する
ためにカム軸に結合し遊星ギヤを備えるとともに一部を
切り欠いたカムギヤと、給紙ローラおよび手差しローラ
にそれぞれ結合されたワンウェイクラッチと、給紙ロー
ラギヤおよび駆動モータ等を設けることにより、自動給
紙および手差し給紙の二系統の給紙を一個の給紙モータ
の回転方向のみで行え、且つ停止時には用紙を載置する
ペーパプレートが押し下げられるため、用紙補給時の操
作性を向上させるとともに、正確な用紙送りを実現でき
るという効果がある。
As described above, the paper feeding mechanism of the present invention includes a cam that presses and releases a paper plate, a cam gear that is coupled to a camshaft and includes a planetary gear and has a portion cut out to drive the cam. By providing a one-way clutch connected to the paper feed roller and manual feed roller, a paper feed roller gear, a drive motor, etc., it is possible to feed two systems of automatic paper feed and manual paper feed only in the rotational direction of one paper feed motor. Since the paper plate on which the paper is placed is pushed down when the paper is stopped, it is possible to improve the operability during paper replenishment and to realize accurate paper feeding.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示す給紙機構の斜視図、第
2図は乃至第5図はそれぞれ第1図に示す給紙機構の一
連の動作を説明するための側面図、第6図および第7図
はそれぞれ従来の一例および他の例を示す給紙機構の側
面図である。 1・・・・・・給紙ローラ、2・・・・・・カムギヤ、
3,4・・・・・・遊星ギヤ、5・・・・・・モータギ
ヤ、6・・・・・・カム、7・・・・・・ペーパプレー
ト、8・・・・・・用紙、9・・団・給紙ローラギヤ、
10・・・・・・手差し用ローラ、11.12・・・・
・・ワンウェイクラッチ、13・・・・・・ペーパプレ
ート押上げバネ、14・・・・・・分離摩擦部材、15
・・・・・・カムアイドルギヤ、16・・・・・・給紙
された用紙、a〜G・・・・・・ギヤ及びローラの回転
方向。
FIG. 1 is a perspective view of a paper feeding mechanism showing an embodiment of the present invention, and FIGS. 2 to 5 are side views and side views for explaining a series of operations of the paper feeding mechanism shown in FIG. 6 and 7 are side views of a conventional paper feeding mechanism and another example, respectively. 1...Paper feed roller, 2...Cam gear,
3, 4... Planet gear, 5... Motor gear, 6... Cam, 7... Paper plate, 8... Paper, 9・・Paper feed roller gear,
10... Manual feed roller, 11.12...
... One-way clutch, 13 ... Paper plate push-up spring, 14 ... Separation friction member, 15
...Cam idle gear, 16...Feed paper, a to G...Rotation direction of gear and roller.

Claims (1)

【特許請求の範囲】[Claims] 給紙ローラの軸に結合された第一のワンウェイクラッチ
と、二枚の連結された遊星ギヤを有し且つ前記給紙ロー
ラの軸に結合された給紙ローラギヤと、用紙を載置する
ペーパプレートを上下させるカムと、前記カムの軸に結
合され且つ一部を切り欠いたカムギヤと、手差しローラ
に結合された第二のワンウェイクラッチと、前記給紙ロ
ーラ、カムおよび手差しローラ等を駆動するモータとを
有することを特徴とする給紙機構。
a first one-way clutch coupled to the shaft of the paper feed roller; a paper feed roller gear having two connected planetary gears and coupled to the shaft of the paper feed roller; and a paper plate on which paper is placed. a cam gear that is connected to the shaft of the cam and has a portion cut out; a second one-way clutch that is connected to the manual feed roller; and a motor that drives the paper feed roller, the cam, the manual feed roller, etc. A paper feeding mechanism comprising:
JP16816089A 1989-06-28 1989-06-28 Sheet feeding mechanism Pending JPH0331130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16816089A JPH0331130A (en) 1989-06-28 1989-06-28 Sheet feeding mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16816089A JPH0331130A (en) 1989-06-28 1989-06-28 Sheet feeding mechanism

Publications (1)

Publication Number Publication Date
JPH0331130A true JPH0331130A (en) 1991-02-08

Family

ID=15862924

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16816089A Pending JPH0331130A (en) 1989-06-28 1989-06-28 Sheet feeding mechanism

Country Status (1)

Country Link
JP (1) JPH0331130A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505969A2 (en) * 1991-03-29 1992-09-30 Sharp Kabushiki Kaisha Paper feeding device for facsimile apparatus
EP0639518A2 (en) * 1993-08-19 1995-02-22 Canon Kabushiki Kaisha Sheet supply apparatus
JP2001192130A (en) * 2000-01-05 2001-07-17 Hewlett Packard Co <Hp> Pickup mechanism and method of performing pickup cycle
JP2008056494A (en) * 2007-11-19 2008-03-13 Ricoh Co Ltd Drive mechanism and carrying device
EP1771366B1 (en) * 2004-07-28 2012-05-02 OLIVETTI S.p.A. Compact structure device for extracting sheets from two trays and respective printer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505969A2 (en) * 1991-03-29 1992-09-30 Sharp Kabushiki Kaisha Paper feeding device for facsimile apparatus
EP0639518A2 (en) * 1993-08-19 1995-02-22 Canon Kabushiki Kaisha Sheet supply apparatus
EP0639518A3 (en) * 1993-08-19 1996-04-17 Canon Kk Sheet supply apparatus.
JP2001192130A (en) * 2000-01-05 2001-07-17 Hewlett Packard Co <Hp> Pickup mechanism and method of performing pickup cycle
JP4588204B2 (en) * 2000-01-05 2010-11-24 ヒューレット・パッカード・カンパニー Pickup mechanism and method of performing pickup cycle
EP1771366B1 (en) * 2004-07-28 2012-05-02 OLIVETTI S.p.A. Compact structure device for extracting sheets from two trays and respective printer
JP2008056494A (en) * 2007-11-19 2008-03-13 Ricoh Co Ltd Drive mechanism and carrying device

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