JPH01113269A - Printer - Google Patents

Abstract

PURPOSE:To minimize the loss of valuable prints due to troubles in paper feeding, by providing a printed mark-detecting means which detects detection marks printed outside a designated printing character area on the printing paper at regular intervals corresponding to a fixed line spacing quantity and judges the propriety of paper feeding on the basis of a feed quantity of a paper-feeding means and a detected interval of the detection marks. CONSTITUTION:At the time of printing on a printing paper 1 fed in the direction of an arrow B by driving a tractor 2, for example, solid-printed detection marks 6a, 6b, 6c are provided in an area in the exterior of a printing area C at regular intervals corresponding to a fixed line spacing. A printed mark-detecting means 5 is located on the upper side of the detection marks 6a-6c, and sequentially detects the detection marks in the order of 6a 6b 6c as the paper 1 is fed. In the case of normal paper feeding, the detection marks 6a-6c are detected one for each fixed-line-spacing amount of feed by the tractor 2. When the interval at which the detection marks 6a-6c are detected does not agree with the fixed line spacing, it is judged that a trouble (skewing, jamming, breakage or the like) in paper feeding is generated, and a printer is instantly stopped.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、印字装置に関し、特に用紙搬送上の不具合検
出を行えるようにした印字装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing device, and more particularly to a printing device capable of detecting defects in paper conveyance.

［従来の技術］ 従来の印字装置においては、トラクタ等の用紙搬送手段
により印字用紙を搬送していく上で、用紙搬送状態が適
正であるかどうか判断する機能がなかった。[Prior Art] Conventional printing apparatuses do not have a function to determine whether or not the paper conveyance state is appropriate when printing paper is conveyed by a paper conveyance means such as a tractor.

［発明が解決しようとする問題点］ 上述した従来の印字装置は、用紙搬送が適正に行われて
いるかどうかの判断機能がないため、用紙搬送上のトラ
ブル（ジャム、斜行、破れ等）が発生した場合でも、通
常印字動作を継続してしまい、その結果ｆ１電な印字情
報が大量に消失してしまうという６欠点がある。[Problems to be Solved by the Invention] The above-mentioned conventional printing devices do not have a function to determine whether or not paper is being conveyed properly, so troubles in paper conveyance (jams, skewed feeding, tears, etc.) may occur. Even if this occurs, the normal printing operation continues, resulting in six drawbacks: a large amount of printed information, such as f1, is lost.

［問題点を解決するための手段］ 本発明は、用紙搬送状態が適正であるかどうかの判断を
行うことにより用紙搬送上のトラブルによる印字情報の
消失等を未然に防止することを目的としてなされたもの
である。[Means for Solving the Problems] The present invention has been made for the purpose of preventing the loss of printed information due to troubles in paper transport by determining whether the paper transport state is appropriate. It is something that

かかる目的を達成する本発明の印字装置は、印字用紙を
搬送する用紙搬送手段と、印字手段と、上記印字用紙上
の指定印字文字エリア外に定改行毎に印字した検知マー
クを検知し上記用紙搬送手段の送り量と上記検知マーク
の検知間隔から用紙搬送が適正かを判断する印字法マー
ク検知手段を備える構成としている。The printing device of the present invention that achieves the above object includes a paper conveyance means for conveying printing paper, a printing means, and a detection mark printed at every regular line break outside the specified print character area on the printing paper. The apparatus is configured to include printing method mark detection means for determining whether paper conveyance is appropriate based on the feed amount of the conveyance means and the detection interval of the detection marks.

［実施例］ 次に、本発明の一実施例について図面を参照して詳細に
説明する。[Example] Next, an example of the present invention will be described in detail with reference to the drawings.

第１図は本発明の一実施例に係る印字装置の概略構造図
である。１は折りたたまれた状態でセットされる印字用
紙、２は印字用紙ｌを搬送するトラクタである。トラク
タ２のピン２ａに印字用紙１のスプロケット穴１ａを係
合することにより搬送を行う、３は印字ヘッド、４は印
字へラド３と対向して位置するプラテンである。印字へ
ラド３は印字用紙１上にシリアルドツトインパクト方式
により印字を行う。FIG. 1 is a schematic structural diagram of a printing device according to an embodiment of the present invention. Reference numeral 1 denotes a printing paper set in a folded state, and 2 a tractor that conveys the printing paper l. The printing paper 1 is conveyed by engaging the sprocket hole 1a of the printing paper 1 with the pin 2a of the tractor 2. 3 is a printing head, and 4 is a platen located opposite to the printing plate 3. The printing pad 3 prints on the printing paper 1 by a serial dot impact method.

５は印字用紙ｌ上に印字された検知マークの有無を検知
する印字法マーク検知手段であり、例えば、反射型光セ
ンサ等の電気素子が用いられる。Reference numeral 5 denotes a printing method mark detection means for detecting the presence or absence of a detection mark printed on the printing paper l, for example, an electric element such as a reflective optical sensor is used.

トラクタ２は、図示しない回転手段によりＡ方向に回転
され印字用紙１の改行送り動作を実行する。また、その
改行量はモータの回転量により制御されている。上記印
字法マーク検知手段５は、第２図に示す如く印字用紙１
の印字エリアＣを外れたエリア（スプロケット穴１ａが
あるエリア）に対応して設置されている。The tractor 2 is rotated in the A direction by a rotating means (not shown) and performs a line feed operation of the printing paper 1. Further, the amount of line feed is controlled by the amount of rotation of the motor. The printing method mark detection means 5 detects the printing method mark on the printing paper 1 as shown in FIG.
It is installed corresponding to the area outside the printing area C (the area where the sprocket hole 1a is located).

次に、用紙搬送状態チエツク用の検知マークの検知動作
について第２図を用いて説明する。Next, the detection operation of the detection mark for checking the paper conveyance state will be explained with reference to FIG.

トラクタ２の駆動によりＢ方向に送出される印字用紙１
上に印字動作を行う場合、印字エリアＣを外れたエリア
部に、例えば塗りつぶした検知マーク６ａ、６ｂ、６ｃ
を印字していく。従って、用紙フォーマット上の最大印
字エリアは、従来通りである。Print paper 1 sent in direction B by the drive of tractor 2
When performing a printing operation on the top, for example, filled detection marks 6a, 6b, 6c are placed in areas outside the printing area C.
will be printed. Therefore, the maximum print area on the paper format remains the same as before.

さらに、検知マーク６ａ、６ｂ、６ｃは、一定の改行間
隔（本実施例では、スプロケット穴ピッチの２倍）で印
字されている。検知マーク６８〜６Ｃの上面には、印字
法マーク検知手段５が位置されていて、印字用紙１の搬
送に従って検知マーク６ａ→６ｂ→６Ｃと順番に検知さ
れる。Furthermore, the detection marks 6a, 6b, and 6c are printed at constant line feed intervals (in this embodiment, twice the sprocket hole pitch). A printing method mark detection means 5 is located on the upper surface of the detection marks 68 to 6C, and the detection marks 6a→6b→6C are detected in order as the printing paper 1 is conveyed.

用紙搬送が正常な場合は、トラクタ２の送り量（改行数
）に対して一定改行毎（本実施例では、スプロケット穴
ピッチの２倍）に、塗りつぶした検知マーク６ａ〜６ｃ
が検知される。逆に、検知マーク６ａ〜６Ｃの検知間隔
が、定改行毎でなくなった場合は、用紙搬送上の不具合
（斜行、ジャム、破れ等）が発生したと判断して、印字
装置を瞬時に停止する。When the paper conveyance is normal, the filled detection marks 6a to 6c are displayed every fixed line feed (in this embodiment, twice the sprocket hole pitch) with respect to the feed amount (number of line feeds) of the tractor 2.
is detected. On the other hand, if the detection interval of the detection marks 6a to 6C is no longer equal to every regular line feed, it is determined that a paper conveyance problem (skewed feeding, jamming, tearing, etc.) has occurred, and the printing device is immediately stopped. do.

［発明の効果］ 以上説明したように本発明は、印字用紙を搬送する用紙
搬送手段と、印字手段と、上記印字用紙上の指定印字文
字エリア外に定改行毎に印字した検知マークを検知し上
記用紙搬送手段の送り量と上記検知マークの検知間隔か
ら用紙搬送が適正かを判断する印字法マーク検知手段を
備えることにより、用紙搬送が適正かどうかを判断でき
、用紙搬送上のトラブルによる貴重な印字の消失を最小
限にくい止める効果がある。[Effects of the Invention] As explained above, the present invention includes a paper conveyance means for conveying printing paper, a printing means, and a detection mark printed on the printing paper outside the designated print character area at every regular line break. By providing a printing method mark detection means that determines whether paper transport is appropriate based on the feed amount of the paper transport means and the detection interval of the detection marks, it is possible to judge whether paper transport is appropriate, and to prevent troubles in paper transport. This has the effect of minimizing the loss of printed characters.

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

第１図は本発明の一実施例に係る印字装置の概略構造図
、第２図は本発明の一実施例の動作を説明するための図
である。 ｌ：用紙　　　　　２：トラクタ ３：印字ヘッド　　４ニブラテン ５：印字法マーク検知手段 ６ａ〜６ｃ：検知マークFIG. 1 is a schematic structural diagram of a printing device according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining the operation of the embodiment of the present invention. l: Paper 2: Tractor 3: Print head 4 Nibraten 5: Printing method mark detection means 6a to 6c: Detection mark

Claims (1)

【特許請求の範囲】[Claims] 印字用紙を搬送する用紙搬送手段と、印字手段と、上記
印字用紙上の指定印字文字エリア外に定改行毎に印字し
た検知マークを検知し上記用紙搬送手段の送り量と上記
検知マークの検知間隔から用紙搬送が適正かを判断する
印字済マーク検知手段を備えることを特徴とする印字装
置。A paper conveying means for conveying the printing paper, a printing means, and a detection mark printed at regular line breaks outside the specified print character area on the printing paper are detected, and the feed amount of the paper conveying means and the detection interval of the detection mark are detected. A printing device characterized by comprising a printed mark detection means that determines whether paper conveyance is appropriate based on the printed mark detection means.