JP2757355B2 - Paper feed mechanism - Google Patents

Paper feed mechanism

Info

Publication number
JP2757355B2
JP2757355B2 JP61150928A JP15092886A JP2757355B2 JP 2757355 B2 JP2757355 B2 JP 2757355B2 JP 61150928 A JP61150928 A JP 61150928A JP 15092886 A JP15092886 A JP 15092886A JP 2757355 B2 JP2757355 B2 JP 2757355B2
Authority
JP
Japan
Prior art keywords
paper
platen
continuous
sheet
cut sheet
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.)
Expired - Lifetime
Application number
JP61150928A
Other languages
Japanese (ja)
Other versions
JPS635975A (en
Inventor
憲二郎 村上
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP61150928A priority Critical patent/JP2757355B2/en
Publication of JPS635975A publication Critical patent/JPS635975A/en
Application granted granted Critical
Publication of JP2757355B2 publication Critical patent/JP2757355B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Handling Of Sheets (AREA)
  • Handling Of Cut Paper (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明はプリンタ装置の紙送り機構に関するものであ
る。 [従来の技術] 印字用紙は温度、湿度等環境による特性変化が大き
く、さらには印字用紙の種類による特性の差異もある。
したがって、これらの条件下でも正常に動作する紙送り
機構が必要である。 第3図は従来の紙送り機構について示したものであ
る。トラクター9より排出された連続伝票用紙11は、紙
案内12により経路を構成されプラテン10に巻張してい
た。正確、確実な紙送り精度を出す為にトラクター9の
周速v′Tは、プラテンの周速v′pより僅かに遅く v′p≧v′Tかつv′p≒v′T の関係があり、常にトラクター9〜プラテン10間の連続
伝票用紙には張力が存在するよう設定してあった。この
張力はプラテン10に巻装する連続伝票用紙11に働く摩擦
力F3に起因しており、巻装角度θ3に大きく依存してい
た。巻装角度θ3は、紙押えローラ13とトラクター9の
プラテン10への相対位置で決定されていた。したがっ
て、プラテン10への連続伝票用紙11の巻装角度θ3と、
単票紙15の巻装角度θ4は、構成部品の配置上あまり差
をつける事ができず、単票紙に合わせた巻装角度θ4を
とれば連続伝票紙の巻装角度θ3が大きくなり、高温高
湿環境時、特に薄い紙では連続伝票用紙の丸穴がトラク
ターピンの係合部で破れ、紙ジャムが発生していた。又
逆に、連続伝票用紙に合わせた巻装角度θ3をとれば、
単票紙の巻装角度θ4が小さくなり、単票用紙送り時低
温時に於て必要な送り力を得る事ができずプラテン上で
の紙のすべりが発生し、紙送りピッチ不良という現象が
出ていた。この現象は紙のコシが強い厚い紙種ではさら
に顕著であった。 [目的] 本発明は上記の不具合点を除去する為のものであり、
環境、紙の種類による紙送りへの影響を極力小さくし、
確実、正確な紙送り機構を得る事である。 [実施例] 以下図面に従って本発明を詳細に説明する。第1図は
連続伝票用紙を送る状態を、第2図は単票紙を送る状態
を示す。第1図に於て、トラクター1より排出された連
続伝票用紙3は紙案内4と紙案内5により経路Aが構成
され、プラテン2へ進む。連続伝票用紙3は紙押えロー
ラ8と紙案内5の先端位置によりプラテン2への巻装角
度θ1が決定される。プラテン2の周速vpとトラクター
の周速vTは従来例と同様に、 vP≧vT かつvp≒vT の関係があり、常にトラクター1からプラテン2間の連
続伝票用紙3には張力が存在するよう設定している。プ
ラテン2上で、連続伝票用紙3に加えられる紙送り力
は、連続伝票用紙3とプラテン2間の摩擦力F1により生
じ、巻装角度θ1に大きく依存する。 第2図に於て、単票紙8の紙案内5に沿って経路Bを
通り直接プラテン2に接触する。その後、第1図に於て
紙案内4の下に位置していた紙送りローラ6が移動し、
バネ力により単票紙8を介してプラテン2を押圧する。
単票紙8の紙送り力は、紙送りローラ6の押圧力と、単
票紙8とプラテン2間の摩擦力F2である。摩擦力F2は単
票紙8のプラテン2への巻装角度θ2に大きく依存す
る。よって紙案内5の角度で単票紙8の挿入角度、つま
り巻装角度θ2により紙送り力を設定する。前記構成よ
りトラクター1に配置されたピンと係合する連続伝票用
紙3の両端の丸穴が破れない程度の紙送り力と、低温
時、単票紙8がプラテン2上ですべらない紙送り力を得
る各々の巻装角度θ1,θ2を紙案内5のみで設定でき
る。 [効果] 以上説明したように本発明による紙送り機構は、連続
用紙を用いる際には紙案内の下面に沿って搬送されるの
で、プラテンとの当接位置が搬送経路の下流側となるこ
とにより、用紙とプラテンとの間で容易に滑りが生じト
ラクタの回転速度に正確に従った速度で用紙は送られ用
紙に損傷を与えることはない上、連続用紙のプラテンへ
の巻き付け角はごく小さくなるという効果がある。ま
た、単票紙を用いる際には、紙案内の上面側において搬
送されるので、プラテンとの当接位置が連続用紙の場合
と比べて搬送経路の上流側となることにより、プラテン
から単票紙に加えられる力が大きくなることにより、用
紙とプラテン間には滑りが生じにくくなり単票紙送り精
度を向上させることができるという効果がある。さら
に、連続用紙の折り畳み位置での折り癖が強くても印字
位置の近傍まで紙案内下面と摺接しながらしごかれるの
で、折り癖が慣らされプラテンに巻き付きやすくなり、
印字時の騒音の発生を押さえることができるという効果
がある。加えて、たとえ連続用紙がやや傾いてセットさ
れた場合でも、プラテンとの間で滑りが生じるので、し
ばらく印字する間にトラクタのピンにより決められる正
しい位置に自然に収まり、用紙送り不良の発生を防ぐこ
とができるという効果がある。
The present invention relates to a paper feed mechanism of a printer device. [Related Art] Printing paper has a large characteristic change due to environment such as temperature and humidity, and further, there is a difference in characteristics depending on the type of printing paper.
Therefore, a paper feed mechanism that operates normally even under these conditions is required. FIG. 3 shows a conventional paper feed mechanism. The continuous slip sheet 11 discharged from the tractor 9 has a path formed by a paper guide 12 and is wound around a platen 10. In order to obtain accurate and reliable paper feeding accuracy, the peripheral speed v'T of the tractor 9 is slightly slower than the peripheral speed v'p of the platen. The relation of v'p≥v'T and v'p ≒ v'T Yes, the continuous slip form between the tractor 9 and the platen 10 is always set to have tension. This tension is caused by the frictional force F3 acting on the continuous slip paper 11 wound on the platen 10, and greatly depends on the winding angle θ3. The winding angle θ3 is determined by the relative position of the paper press roller 13 and the tractor 9 with respect to the platen 10. Therefore, the winding angle θ3 of the continuous chit sheet 11 around the platen 10,
The winding angle θ4 of the cut sheet 15 cannot be so different due to the arrangement of the components, and if the winding angle θ4 according to the cut sheet is taken, the winding angle θ3 of the continuous slip sheet becomes large, In a high-temperature, high-humidity environment, especially for thin paper, the round hole of the continuous slip paper was torn at the engaging portion of the tractor pin, and paper jam occurred. Conversely, by taking the winding angle θ3 according to the continuous slip paper,
The winding angle θ4 of the cut sheet becomes small, the required feeding force cannot be obtained at the time of cut sheet feeding at low temperature, the paper slips on the platen, and the paper feed pitch is poor. Was. This phenomenon was more remarkable in thick paper types having a strong paper stiffness. [Purpose] The present invention is to eliminate the above disadvantages,
The influence on the paper feed by the environment and the type of paper is minimized,
It is to obtain a reliable and accurate paper feeding mechanism. EXAMPLES The present invention will be described below in detail with reference to the drawings. FIG. 1 shows a state in which a continuous slip sheet is sent, and FIG. 2 shows a state in which a cut sheet is fed. In FIG. 1, a continuous slip sheet 3 discharged from the tractor 1 forms a path A by a paper guide 4 and a paper guide 5, and proceeds to a platen 2. The winding angle θ1 of the continuous slip sheet 3 around the platen 2 is determined by the position of the paper pressing roller 8 and the leading end of the paper guide 5. The peripheral speed vp of the platen 2 and the peripheral speed vT of the tractor have the relationship of vP ≧ vT and vp ≒ vT, as in the conventional example, so that tension is always present on the continuous slip paper 3 between the tractor 1 and the platen 2. You have set. The paper feeding force applied to the continuous chit sheet 3 on the platen 2 is generated by the frictional force F1 between the continuous chit sheet 3 and the platen 2, and greatly depends on the winding angle θ1. In FIG. 2, the platen 2 directly contacts the platen 2 along the path B along the paper guide 5 of the cut sheet 8. Thereafter, the paper feed roller 6 located below the paper guide 4 in FIG.
The platen 2 is pressed via the cut sheet 8 by a spring force.
The paper feed force of the cut sheet 8 is the pressing force of the sheet feed roller 6 and the frictional force F2 between the cut sheet 8 and the platen 2. The frictional force F2 greatly depends on the winding angle θ2 of the cut sheet 8 around the platen 2. Therefore, the paper feed force is set by the angle of the paper guide 5 and the insertion angle of the cut sheet 8, that is, the winding angle θ2. According to the above configuration, the paper feeding force to the extent that the round holes at both ends of the continuous slip paper 3 engaging with the pins arranged on the tractor 1 are not broken, and the paper feeding force at which the cut sheet 8 does not slip on the platen 2 at low temperatures. The obtained winding angles θ1 and θ2 can be set only by the paper guide 5. [Effect] As described above, the paper feeding mechanism according to the present invention is conveyed along the lower surface of the paper guide when continuous paper is used, so that the contact position with the platen is on the downstream side of the conveyance path. As a result, the paper is easily slipped between the paper and the platen, and the paper is fed at a speed exactly according to the rotation speed of the tractor, without damaging the paper, and the wrapping angle of the continuous paper around the platen is extremely small. It has the effect of becoming. In addition, when a cut sheet is used, the sheet is conveyed on the upper side of the paper guide, so that the contact position with the platen is on the upstream side of the conveyance path as compared with the case of the continuous sheet, so that the cut sheet is separated from the platen. By increasing the force applied to the paper, there is an effect that slippage is less likely to occur between the paper and the platen, and the cut sheet feeding accuracy can be improved. Further, even if the continuous paper has a strong folding habit at the folding position, the continuous paper is squeezed while being in sliding contact with the lower surface of the paper guide up to the vicinity of the printing position.
There is an effect that generation of noise at the time of printing can be suppressed. In addition, even if the continuous paper is set with a slight inclination, slippage occurs between the platen and the paper. There is an effect that can be.

【図面の簡単な説明】 第1図、第2図は本発明の一実施例を示し、第1図は連
続伝票用紙を、第2図は単票紙を送る状態を示す。第3
図は従来例を示す。 1,9……トラクター 2,10……プラテン 3,11……連続伝票用紙 8,15……単票紙 4,5,12……紙案内 7,13……紙押えローラ
BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 show an embodiment of the present invention. FIG. 1 shows a state where a continuous slip sheet is fed, and FIG. 2 shows a state where a cut sheet is fed. Third
The figure shows a conventional example. 1,9 ... Tractor 2,10 ... Platen 3,11 ... Continuous slip paper 8,15 ... Single paper 4,5,12 ... Paper guide 7,13 ... Paper holding roller

Claims (1)

(57)【特許請求の範囲】 1.プラテンを境として印字部から排紙部へと選択され
た連続用紙もしくは単票紙のいずれか一方をU字状に搬
送しつつ印字するプリンタの紙送り機構において、 前記プラテン側の面を前記単票紙の案内面、前記プラテ
ンの反対側の面を前記連続用紙の案内面とする共通の紙
案内部材が前記単票紙と前記連続用紙の各給送部間に配
設されるとともに、前記連続用紙は前記共通の紙案内部
材の端縁に摺接しつつ搬送されることを特徴とする紙送
り機構。
(57) [Claims] In a paper feed mechanism of a printer for printing while conveying either a continuous sheet or a cut sheet selected from a printing unit to a discharge unit with a platen as a boundary in a U-shape, the platen side surface is A common paper guide member having a guide surface of the slip paper and a surface on the opposite side of the platen as a guide surface of the continuous paper is disposed between the cut sheet and each feeding unit of the continuous paper, and A paper feed mechanism wherein the continuous paper is conveyed while sliding on an edge of the common paper guide member.
JP61150928A 1986-06-27 1986-06-27 Paper feed mechanism Expired - Lifetime JP2757355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61150928A JP2757355B2 (en) 1986-06-27 1986-06-27 Paper feed mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61150928A JP2757355B2 (en) 1986-06-27 1986-06-27 Paper feed mechanism

Publications (2)

Publication Number Publication Date
JPS635975A JPS635975A (en) 1988-01-11
JP2757355B2 true JP2757355B2 (en) 1998-05-25

Family

ID=15507472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61150928A Expired - Lifetime JP2757355B2 (en) 1986-06-27 1986-06-27 Paper feed mechanism

Country Status (1)

Country Link
JP (1) JP2757355B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07118871B2 (en) * 1988-10-05 1995-12-18 東京電力株式会社 Control system with built-in automatic oscilloscope

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123310B1 (en) * 1983-04-26 1990-02-07 Siemens Aktiengesellschaft Sheet and web feeding device for printers

Also Published As

Publication number Publication date
JPS635975A (en) 1988-01-11

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