JPH07214846A - Thermal printer - Google Patents

Thermal printer

Info

Publication number
JPH07214846A
JPH07214846A JP6009211A JP921194A JPH07214846A JP H07214846 A JPH07214846 A JP H07214846A JP 6009211 A JP6009211 A JP 6009211A JP 921194 A JP921194 A JP 921194A JP H07214846 A JPH07214846 A JP H07214846A
Authority
JP
Japan
Prior art keywords
recording paper
printing
thermal printer
guide member
panel
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
JP6009211A
Other languages
Japanese (ja)
Inventor
Masato Tsukuda
正人 佃
Ichiro Arai
一郎 新井
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6009211A priority Critical patent/JPH07214846A/en
Publication of JPH07214846A publication Critical patent/JPH07214846A/en
Pending legal-status Critical Current

Links

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  • Handling Of Cut Paper (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

PURPOSE:To obtain an excellent thermal printer which maintains line feed precision, print quality, etc., without depending on the kind and the thickness of recording paper and does not cause a ruled line slippage, in regard to a thermal printer equipped with a panel for a printing part cover. CONSTITUTION:A recording paper guide member 12 which rotates around a fulcrum provided in the vicinity of the fore end part of a panel for a printing part cover covering a printing part and of which the fore end projects further from the fore end of the panel for the printing part cover and fulfills both a function of pressing recording paper and a function of guiding the fore end of the recording paper in the direction of discharge, is provided. In the case of thin recording paper of which the self-holding force is small, according to this constitution, the recording paper guide member rotates and presses the recording paper in printing. Thereby the recording paper is bent backward from a printing surface, the self-holding force in the direction of thrust is increased and the recording paper being in contact with a thermal head is prevented from moving in the same direction as the head with its movement on the occasion of printing. A slippage of a ruled line does not occur either.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は印字部を覆うとともに記
録紙を排出する際のガイド部を備えた印字部カバー用パ
ネルを有するサーマルプリンタに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal printer having a printing section cover panel which covers a printing section and is provided with a guide section for discharging recording paper.

【0002】[0002]

【従来の技術】近年、情報処理装置などの出力装置とし
て使用されるサーマルプリンタは、小型化と高密度化が
進むと共に、複数行を一括して印字するマルチラインタ
イプが主流になりつつある。このようなサーマルプリン
タは、一般にインクリボンを取り替えたり、記録紙が詰
まったりした時に対処するために、印字部の上方に開閉
可能なパネルを有している。
2. Description of the Related Art In recent years, a thermal printer used as an output device such as an information processing device is becoming smaller and higher in density, and a multi-line type which prints a plurality of lines collectively is becoming mainstream. Such a thermal printer generally has an openable / closable panel above the printing unit in order to deal with the case where the ink ribbon is replaced or the recording paper is jammed.

【0003】このような印字部カバー用パネルを備えた
従来のサーマルプリンタについて、以下に図を用いて説
明する。図4は従来のサーマルプリンタの断面を示すも
のである。図4において、41は記録紙20に印字を行
う印字部を備えたプリンタユニット、40はプリンタ装
置に開閉可能に取り付けられ、印字部を覆う印字部カバ
ー用パネルである。印字部カバー用パネル40は図4に
示すように、裏面の一部を記録紙のガイド面42として
いる。ガイド面42は記録紙排出時の紙ガイドの役目を
負っている。
A conventional thermal printer provided with such a printing section cover panel will be described below with reference to the drawings. FIG. 4 shows a cross section of a conventional thermal printer. In FIG. 4, 41 is a printer unit having a printing unit for printing on the recording paper 20, and 40 is a printing unit cover panel which is attached to the printer device so as to be openable and closable and covers the printing unit. As shown in FIG. 4, a part of the back surface of the printing section cover panel 40 is used as a guide surface 42 of the recording paper. The guide surface 42 serves as a paper guide for discharging the recording paper.

【0004】以上のように構成されたサーマルプリンタ
について、以下その動作を説明する。まず、図4におい
て、後部より記録紙20が挿入される。次にプリンタユ
ニット41の印字部で記録紙20に印字を行う。サーマ
ルプリンタの場合、サーマルヘッド(図示せず)の発熱
体を加熱し、この熱により発色する感熱紙を使用するタ
イプと、該サーマルヘッドの熱でインクリボンを加熱し
て熱溶融性インクを溶かし記録紙上に転写するタイプが
ある。いずれのタイプであってもサーマルヘッドの発熱
体の熱を感熱紙またはインクリボンに伝える必要がある
ため、印字動作としてはサーマルヘッドをプラテン21
上の記録紙20に直接、またはインクリボンを介して圧
着させ、サーマルヘッドを移動させながら発熱体を加熱
することにより印字を行う。改行やキャリッジリターン
時には、サーマルヘッドまたはインクリボンが記録紙2
0をこすらない様に、サーマルヘッドを記録紙20から
退避させる。印字された記録紙20は、先端が印字部カ
バー用パネル40のガイド面42に接触し、その面に沿
って開口部にガイドされ排出される。
The operation of the thermal printer having the above structure will be described below. First, in FIG. 4, the recording paper 20 is inserted from the rear. Next, the printing section of the printer unit 41 prints on the recording paper 20. In the case of a thermal printer, a type that uses a heat-sensitive paper that heats a heating element of a thermal head (not shown), and the heat of the thermal head heats an ink ribbon to melt the heat-meltable ink. There is a type that is transferred onto recording paper. In either type, it is necessary to transfer the heat of the heating element of the thermal head to the thermal paper or the ink ribbon.
Printing is performed by pressing the upper recording paper 20 directly or via an ink ribbon and heating the heating element while moving the thermal head. At the time of line feed or carriage return, the thermal head or ink ribbon is used for recording paper 2.
The thermal head is retracted from the recording paper 20 so as not to rub 0. The leading end of the printed recording paper 20 comes into contact with the guide surface 42 of the panel 40 for the printing portion cover, and the recording paper 20 is guided to the opening along the surface and discharged.

【0005】[0005]

【発明が解決しようとする課題】しかしながら上記従来
の構成では、図4の記録紙20を保持しているのは、プ
ラテン21の下の紙送りローラー22のみで、後は記録
紙20の自己保持力(紙の腰の力)だけで支えられてい
る。そのため、自己保持力の小さい(腰の弱い)薄手の
感熱紙等で印字を行った場合、サーマルヘッドが移動す
る際に接触している記録紙も同じ方向に動いてしまう。
そのため次の行の印字位置がズレてしまい、行をまたい
だ文字間で段差ができてしまう。特に縦罫線の様に縦方
向に複数行にまたがる直線等の印字を行うと、行毎に印
字位置がズレ(以降罫線ズレと呼ぶ)階段状の線になっ
てしまう。また、最悪時には記録紙にシワが入ってしま
い、以降の印字ができなくなってしまうという問題点を
有していた。
However, in the above-mentioned conventional structure, the recording paper 20 of FIG. It is supported only by the force (the power of the waist of the paper). Therefore, when printing is performed with thin thermal paper or the like having a small self-holding force (weakness), the recording paper that is in contact when the thermal head moves also moves in the same direction.
As a result, the print position of the next line will be misaligned, and a step will be created between the characters across the lines. In particular, when a straight line such as a vertical ruled line that extends over a plurality of lines in the vertical direction is printed, the printing position shifts from line to line (hereinafter referred to as a ruled line shift), resulting in a step-like line. In the worst case, the recording paper has wrinkles, which makes it impossible to perform subsequent printing.

【0006】近年主流になってきている複数行を同時に
印字するマルチラインタイプのプリンタでは、サーマル
ヘッドと記録紙の接触面積・圧着力が大きくなっている
ため、この問題点が顕著に現れる。
In a multi-line type printer which prints a plurality of lines at the same time, which has become mainstream in recent years, the contact area between the thermal head and the recording paper and the pressure bonding force are large, and this problem becomes remarkable.

【0007】本発明は上記従来の問題点を解決するもの
で、記録紙の種類や厚みによらず改行精度、印字品質等
を維持し、罫線ズレを起こさないサーマルプリンタを提
供することを目的とする。
The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a thermal printer which maintains line feed accuracy, print quality and the like regardless of the type and thickness of recording paper and does not cause ruled line misalignment. To do.

【0008】[0008]

【課題を解決するための手段】この目的を達成するため
に本発明のサーマルプリンタは、プリンタ本体に開閉可
能に取り付けられ、閉じたときには印字部を覆う印字部
カバー用パネルと、印字部カバー用パネルの先端部近傍
に設けられた支点を中心に回動し、その先端が印字部カ
バー用パネル先端よりも更に突出し記録紙を押圧し、記
録紙の先端を排出方向へガイドする記録紙ガイド部材と
を備えたものである。
In order to achieve this object, a thermal printer according to the present invention is attached to a printer body so as to be openable and closable, and a printing section cover panel for covering the printing section when closed and a printing section cover. A recording paper guide member that rotates around a fulcrum provided near the front end of the panel, the front end of the panel further protrudes beyond the front end of the panel for the printing unit cover, presses the recording paper, and guides the front end of the recording paper in the discharge direction. It is equipped with and.

【0009】[0009]

【作用】この構成をとることによって、自己保持力の小
さい記録紙の場合、印字中に記録紙ガイド部材が回動
し、印字部カバー用パネル先端よりも更に突出して記録
紙を押圧することにより、記録紙は印字面より後ろに曲
げられる。曲げられた記録紙は、スラスト方向に対する
自己保持力が増し、印字時にサーマルヘッドの移動に伴
って同一方向に動くことはなくなる。従って記録紙が動
いてしまうことによって起こる罫線ズレや紙シワが解消
できる。
With this configuration, in the case of recording paper having a small self-holding force, the recording paper guide member rotates during printing, and further pushes the recording paper by projecting further than the front end of the printing unit cover panel. , The recording paper is bent behind the printing surface. The bent recording paper has an increased self-holding force in the thrust direction, and does not move in the same direction as the thermal head moves during printing. Therefore, it is possible to eliminate the ruled line shift and the paper wrinkle caused by the movement of the recording paper.

【0010】また、厚手の記録紙や自己保持力の大きい
記録紙に対しては記録紙ガイド部材が印字時とは逆方向
に回動し、印字部カバー用パネル先端よりは突出しない
ので用紙経路の妨げにならず改行精度、印字品質等を維
持することができる。
Further, for thick recording paper or recording paper having a large self-holding force, the recording paper guide member rotates in the direction opposite to that at the time of printing, and does not protrude beyond the front end of the panel for the printing unit cover, so that the paper path. It is possible to maintain line feed accuracy, print quality, etc. without hindering

【0011】[0011]

【実施例】以下本発明の実施例について図面を参照しな
がら説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0012】図1は本発明の一実施例のサーマルプリン
タにおけるの印字部カバー用パネルを示す断面斜視図で
ある。図1において、12は印字部カバー用パネル10
に設けられた支点を中心に回動する記録紙ガイド部材、
13は記録紙ガイド部材が回動するためのガイド回転
軸、14は記録紙ガイド部材12に荷重を与えるガイド
押圧バネである。
FIG. 1 is a cross-sectional perspective view showing a printing unit cover panel in a thermal printer according to an embodiment of the present invention. In FIG. 1, reference numeral 12 is a panel 10 for a printing unit cover.
A recording paper guide member that rotates around a fulcrum provided on the
Reference numeral 13 is a guide rotation shaft for rotating the recording paper guide member, and 14 is a guide pressing spring for applying a load to the recording paper guide member 12.

【0013】以上のように構成された図1の印字部カバ
ー用パネルを備えたサーマルプリンタについて、図2及
び図3を用いてその動作を説明する。
The operation of the thermal printer having the printing portion cover panel of FIG. 1 configured as described above will be described with reference to FIGS. 2 and 3.

【0014】図2は薄手の記録紙を装着したサーマルプ
リンタの断面図である。記録紙がプリンタ後方より挿入
されると、紙送りローラーで駆動されプリンタユニット
の印字部のプラテンへ送られ印字が行われる。その時サ
ーマルヘッドと接触している記録紙も同じ方向に動かす
力が働くが、プラテン21の上方近傍で記録紙ガイド部
材12に押され記録紙が曲げられているために、記録紙
を動かす方向(スラスト方向)の力に対する自己保持力
が増し、スラスト方向の力に打ち勝ち記録紙は動かず罫
線ズレも紙シワも発生しない。
FIG. 2 is a sectional view of a thermal printer equipped with thin recording paper. When the recording paper is inserted from the rear side of the printer, it is driven by the paper feed roller and is sent to the platen of the printing unit of the printer unit for printing. At that time, a force for moving the recording paper in contact with the thermal head also acts in the same direction, but since the recording paper is bent by being pressed by the recording paper guide member 12 in the vicinity of the upper part of the platen 21, the recording paper is moved in the direction ( The self-holding force against the force in the thrust direction) increases, and the force in the thrust direction is overcome, the recording paper does not move, and there is no ruled line shift or paper wrinkle.

【0015】図3は厚手の記録紙を装着したサーマルプ
リンタの断面図である。記録紙30はできるだけ曲げな
い用にするため、記録紙への曲率を大きくとれるプリン
タ後方下部から挿入される。後は同じ様に紙送りローラ
ーで駆動されプリンタユニットの印字部のプラテンへ送
られ印字が行われる。この時、記録紙ガイド部材12の
ガイド押圧バネ14は記録紙の自己保持力より弱く設定
しておき、記録紙を曲げない様にしてある。自己保持力
の強い厚手の記録紙をプラテン近傍で無理に曲げると、
記録紙がプラテンに沿わず印字不良が発生したり、記録
紙の駆動に対し不要な力が働くため、改行精度が低下し
てしまうためである。
FIG. 3 is a sectional view of a thermal printer equipped with thick recording paper. In order to avoid bending the recording paper 30 as much as possible, the recording paper 30 is inserted from the lower rear portion of the printer that allows a large curvature. After that, it is similarly driven by the paper feed roller and is fed to the platen of the printing unit of the printer unit for printing. At this time, the guide pressing spring 14 of the recording paper guide member 12 is set to be weaker than the self-holding force of the recording paper so that the recording paper is not bent. If you forcibly bend a thick recording paper with strong self-holding power near the platen,
This is because the recording paper does not follow the platen, printing defects occur, and unnecessary force acts on the driving of the recording paper, so that the line feed accuracy decreases.

【0016】また、周辺機器であるはがき自動給紙装置
等を装着した際に、記録紙の排出方向が変わると紙詰ま
りの原因になるが、本発明のサーマルプリンタでは記録
紙の排出方向は変わらず、問題なく使用できる。
Further, when a postcard automatic paper feeder, which is a peripheral device, is attached, if the discharge direction of the recording paper is changed, it may cause a paper jam, but in the thermal printer of the present invention, the discharge direction of the recording paper is changed. It can be used without any problems.

【0017】なお、記録紙ガイド部材は、ガイド押圧バ
ネの押圧力により回動するようにしたが、記録紙ガイド
部材の自重を利用するようにしても同様の効果を生じる
ことはいうまでもない。
Although the recording paper guide member is rotated by the pressing force of the guide pressing spring, it goes without saying that the same effect can be obtained by utilizing the own weight of the recording paper guide member. .

【0018】[0018]

【発明の効果】以上のように本発明は、印字部を覆う印
字部カバー用パネルの先端部近傍に設けられた支点を中
心に回動し、先端が印字部カバー用パネル先端よりも更
に突出し記録紙を押圧する役目と、記録紙の先端を排出
方向へガイドする役目を兼ねた記録紙ガイド部材を備え
ることにより、記録紙の種類や厚みによらず改行精度・
印字品質等を維持し、罫線ズレを起こさない優れたサー
マルプリンタをを実現できるものである。
As described above, the present invention rotates about a fulcrum provided in the vicinity of the front end of the printing unit cover panel that covers the printing unit, and the front end further projects from the front end of the printing unit cover panel. By providing a recording paper guide member that both presses the recording paper and guides the leading edge of the recording paper in the ejection direction, line feed accuracy and
It is possible to realize an excellent thermal printer that maintains the printing quality and the like and does not cause the deviation of ruled lines.

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

【図1】本発明の一実施例のサーマルプリンタにおける
印字部カバー用パネルを示す断面斜視図
FIG. 1 is a cross-sectional perspective view showing a printing unit cover panel in a thermal printer according to an embodiment of the present invention.

【図2】本発明の一実施例のサーマルプリンタに薄手の
記録紙を装着した時の断面図
FIG. 2 is a sectional view when a thin recording paper is attached to the thermal printer according to the embodiment of the present invention.

【図3】本発明の一実施例のサーマルプリンタに厚手の
記録紙を装着した時の断面図
FIG. 3 is a sectional view when a thick recording paper is attached to the thermal printer according to the embodiment of the present invention.

【図4】従来のサーマルプリンタの断面図FIG. 4 is a sectional view of a conventional thermal printer.

【符号の説明】[Explanation of symbols]

10 印字部カバー用パネル 12 記録紙ガイド部材 13 ガイド回転軸 14 ガイド押圧バネ 20 記録紙 21 プラテン 22 紙送りローラー 10 Print Section Cover Panel 12 Recording Paper Guide Member 13 Guide Rotation Shaft 14 Guide Pressing Spring 20 Recording Paper 21 Platen 22 Paper Feed Roller

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】給紙された記録紙に印字を行う印字部と、
プリンタ本体に開閉可能に取り付けられ、閉じたときに
は前記印字部を覆う印字部カバー用パネルと、前記印字
部カバー用パネルの先端部近傍に設けられた支点を中心
に回動し、記録紙の先端を排出方向へガイドする記録紙
ガイド部材とを備えたことを特徴とするサーマルプリン
タ。
1. A printing unit for printing on a fed recording paper,
It is attached to the printer body so as to be openable and closable, and when it is closed, it rotates about a printing unit cover panel that covers the printing unit and a fulcrum provided near the leading end of the printing unit cover panel, and the leading end of the recording paper. And a recording paper guide member for guiding the sheet in the discharge direction.
【請求項2】記録紙ガイド部材先端が、印字部カバー用
パネル先端よりも更に突出し、記録紙を押圧する方向に
回動することを特徴とする請求項1記載のサーマルプリ
ンタ。
2. The thermal printer according to claim 1, wherein the leading end of the recording paper guide member further protrudes from the leading end of the printing section cover panel and rotates in a direction of pressing the recording paper.
【請求項3】記録紙ガイド部材は自重、または印字部カ
バー用パネルに設けられたバネ材の荷重により回動する
ことを特徴とする請求項1記載のサーマルプリンタ。
3. The thermal printer according to claim 1, wherein the recording paper guide member is rotated by its own weight or by the load of a spring material provided on the printing portion cover panel.
JP6009211A 1994-01-31 1994-01-31 Thermal printer Pending JPH07214846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6009211A JPH07214846A (en) 1994-01-31 1994-01-31 Thermal printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6009211A JPH07214846A (en) 1994-01-31 1994-01-31 Thermal printer

Publications (1)

Publication Number Publication Date
JPH07214846A true JPH07214846A (en) 1995-08-15

Family

ID=11714137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6009211A Pending JPH07214846A (en) 1994-01-31 1994-01-31 Thermal printer

Country Status (1)

Country Link
JP (1) JPH07214846A (en)

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