JP2007168336A - Dot line printer - Google Patents

Dot line printer Download PDF

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Publication number
JP2007168336A
JP2007168336A JP2005371159A JP2005371159A JP2007168336A JP 2007168336 A JP2007168336 A JP 2007168336A JP 2005371159 A JP2005371159 A JP 2005371159A JP 2005371159 A JP2005371159 A JP 2005371159A JP 2007168336 A JP2007168336 A JP 2007168336A
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JP
Japan
Prior art keywords
paper
platen
printing
dot line
line printer
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Pending
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JP2005371159A
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Japanese (ja)
Inventor
Michimasa Watabiki
道誠 綿引
Masayuki Sunaoshi
雅之 砂押
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Ricoh Printing Systems Ltd
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Ricoh Printing Systems Ltd
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Application filed by Ricoh Printing Systems Ltd filed Critical Ricoh Printing Systems Ltd
Priority to JP2005371159A priority Critical patent/JP2007168336A/en
Publication of JP2007168336A publication Critical patent/JP2007168336A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a dot line printer which can prevent inconveniences such as deviation of a stopping location of paper due to printing load, increase in strike sound of printing elements, and soiling of the paper with ink, because when paper winds on a platen having a flat strike surface, the paper is lifted from the strike face of the platen due to the rigidity of the paper, the dot line printer being produceable at a much lower cost than a dot line printer having a platen having a curved strike face with a predetermined round curvature, to thereby bring about advantages of low costs and high reliability. <P>SOLUTION: The dot line printer includes the platen having a paper guide in a paper carrying direction and the flat strike face, and a paper feeding mechanism for feeding the paper along the paper guide which is arranged at a predetermined incident angle and a predetermined outgoing angle with respect to the platen such that the paper winds on the platen with the predetermined round curvature. The dot line printer allows the paper and an ink ribbon to be arranged between the printing element and the platen, and carries out printing by a hammer bank. Herein upper and lower edges formed on a flat portion of the platen in the paper carrying direction are set on the circumference with the predetermined round curvature. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ドット印字用ハンマによりドットマトリクス形式で印刷を行うドットラインプリンタのプラテンに関するものである。   The present invention relates to a platen of a dot line printer that performs printing in a dot matrix format using a dot printing hammer.

図2及び図3にドットラインプリンタの印字機構の概略を示す。   2 and 3 schematically show the printing mechanism of the dot line printer.

印字素子1aを有するハンマバンク1は、図示しないシャトル機構部により桁方向(図3矢印A方向)に往復運動する。また、ハンマバンク1はインクリボン2と用紙3とを間に挟み、印字力を支持するため桁方向に延びたプラテン5と対向した状態で配置されていて、ハンマバンク1が往復運動しながら印字素子1aが適時駆動される毎にドットマトリクス形式で、文字や図形等が用紙3に印字される。用紙3はハンマバンク1の反転時に適時、プラテン5に対して所定の入射角及び出射角をもって、用紙3がプラテン5に巻き付くような状態で紙送り機構4により紙送り方向(矢印B方向)に送られる。   The hammer bank 1 having the printing element 1a reciprocates in the digit direction (arrow A direction in FIG. 3) by a shuttle mechanism (not shown). The hammer bank 1 is disposed in a state where the ink bank 2 is sandwiched between the paper 3 and the platen 5 extending in the digit direction to support the printing force, and the hammer bank 1 performs printing while reciprocating. Each time the element 1a is driven in a timely manner, characters and figures are printed on the paper 3 in a dot matrix format. The paper 3 is fed in the paper feed direction (arrow B direction) by the paper feed mechanism 4 in a state where the paper 3 is wound around the platen 5 at a suitable time when the hammer bank 1 is reversed with a predetermined incident angle and outgoing angle with respect to the platen 5 Sent to.

通常、上記ドットラインプリンタにおいて、印字素子1aとプラテン5間のギャップは印字素子1aの打撃力および打撃に要する時間をほぼ一定にするために約10μm単位の精度にて管理されている。なお、印字素子1a先端の打撃部直径はφ0.2mm程度とすることが一般的である。   Usually, in the dot line printer, the gap between the printing element 1a and the platen 5 is managed with an accuracy of about 10 μm in order to make the striking force and the time required for striking the printing element 1a substantially constant. Note that the diameter of the striking portion at the tip of the printing element 1a is generally about φ0.2 mm.

プラテン5には、印字素子1aの打撃面を所定の曲率Rにて構成したもの(例えば、特許文献1参照。)と、印字素子1aの打撃面をフラットに構成したもの(例えば、特許文献2、3参照。)がある。打撃面を所定の曲率Rの曲面にて形成したプラテン5の場合、図2に示すように印字素子1aを用紙搬送方向に多段配列させたハンマバンク1では印字素子1aとプラテン5間のギャップ量が印字素子1aの位置毎で変化する。この結果、印字素子1a毎の打撃力や打撃に要する時間に差が発生し、印字濃度などの印刷品質のばらつきを発生させる。このため、このギャップ量のばらつきを克服するためにプラテン5の打撃面形状をフラット化したものを適用することが多い。   In the platen 5, the striking surface of the printing element 1a is configured with a predetermined curvature R (see, for example, Patent Document 1), and the striking surface of the printing element 1a is configured in a flat shape (for example, Patent Document 2). 3). In the case of the platen 5 in which the striking surface is formed with a curved surface having a predetermined curvature R, in the hammer bank 1 in which the printing elements 1a are arranged in multiple stages in the paper conveying direction as shown in FIG. 2, the gap amount between the printing elements 1a and the platen 5 Changes for each position of the printing element 1a. As a result, a difference occurs in the striking force and the time required for the striking for each printing element 1a, thereby causing variations in printing quality such as printing density. For this reason, in order to overcome this variation in gap amount, a flattened striking surface shape of the platen 5 is often applied.

特許第3487439号公報Japanese Patent No. 3487439

特開2003−145853号公報JP 2003-145853 A

特開2003−39755号公報 また、上記記載のハンマバンク1は印字素子1aを用紙搬送方向に多段配列したものであるが、印字素子1aを用紙搬送方向に対し単一配列のみで構成する場合もある。この場合、印字に要する単位時間当たりのシャトル往復数を上げて必要印刷速度を得るようにしており、高周波数のシャトル往復駆動となる。また、印字素子1aを用紙搬送方向に対し単一配列のハンマバンク1は多段配列のハンマバンク1に比べ製作コストが安価にできるというメリットもある。JP, 2003-39755, A The above-mentioned hammer bank 1 is one in which the printing elements 1a are arranged in multiple stages in the paper conveyance direction. However, the printing element 1a may be constituted by only a single arrangement in the paper conveyance direction. is there. In this case, the number of shuttle reciprocations per unit time required for printing is increased to obtain the required printing speed, and the shuttle reciprocating drive at a high frequency is performed. Further, the hammer bank 1 having a single arrangement of the printing elements 1a in the sheet conveying direction has an advantage that the manufacturing cost can be reduced as compared with the hammer bank 1 having a multi-stage arrangement.

プラテン5の打撃面をフラットとして用紙3を巻きつけた場合、図2に示すように用紙3の剛性によりプラテン5の打撃面より用紙3が浮いた状態となり十分に密着できないため、印字負荷に伴う用紙3の停止ズレや印字素子1aの打撃音の増大および、用紙3に対するインク汚れの付着などが発生する。   When the paper 3 is wound with the striking surface of the platen 5 being flat, the paper 3 is lifted from the striking surface of the platen 5 due to the rigidity of the paper 3 as shown in FIG. Stoppage deviation of the paper 3, an increase in the striking sound of the printing element 1 a, and adhesion of ink stains to the paper 3 occur.

上記課題は、複数個の印字素子を搭載したハンマバンクと、前記ハンマバンクを桁方向に往復移動させるシャトル機構と、用紙搬送方向にペーパガイドを装着し、前記印字素子の印字力を保持するために設けられた打撃面がフラットなプラテンと、該プラテンに対して所定の入射角及び出射角をもって用紙が前記プラテンに所定のR曲率で巻き付くように配置した前記ペーパガイドに沿って搬送せしめる紙送り機構とを有し、前記印字素子と前記プラテンの間に前記用紙とインクリボンを配置して前記ハンマバンクにて印字を行うドットラインプリンタにおいて、プラテンのフラット部の用紙搬送方向に形成される上側及び下側のエッジ部を所定曲率の円周上に一致させることにより解決される。   In order to maintain the printing force of the printing element by mounting a hammer bank having a plurality of printing elements, a shuttle mechanism for reciprocating the hammer bank in the digit direction, and a paper guide in the paper transport direction. A platen having a flat striking surface provided on the paper, and a paper to be conveyed along the paper guide arranged so that the paper is wound around the platen with a predetermined R-curvature with a predetermined incident angle and outgoing angle. In a dot line printer having a feeding mechanism and placing the paper and an ink ribbon between the printing element and the platen and performing printing on the hammer bank, the platen is formed in the paper conveyance direction of the flat portion of the platen. This is solved by matching the upper and lower edge portions on the circumference of a predetermined curvature.

本発明によれば、特に印字素子を用紙搬送方向に単一配列のみで構成するドットラインプリンタにおいて、フラット化したプラテンでも打撃面を所定のR曲率の曲面で構成するプラテンと同等の用紙密着保持状態を確保し、印字時の摩擦負荷に伴う用紙の停止位置ズレや打撃音の増大、および用紙に対するインク汚れの付着を防止できると共に、打撃面を所定のR曲率の曲面で構成するプラテンより遥かに安価に製作できることから、低コストで信頼性の高いドットラインプリンタを提供することができる。   According to the present invention, in particular, in a dot line printer in which the printing elements are configured by only a single array in the sheet conveyance direction, even with a flattened platen, the sheet contact and holding equivalent to that of a platen in which the striking surface is a curved surface with a predetermined R curvature is maintained. It is possible to secure the state, prevent paper stop position shift and impact noise increase due to frictional load during printing, and prevent ink stains from adhering to the paper, and far more than a platen that has a curved surface with a predetermined R curvature. Therefore, it is possible to provide a low-cost and highly reliable dot line printer.

以下に、本発明の実施例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

印字素子1aが用紙搬送方向に単一配列として構成するハンマバンク1を使用するドットラインプリンタのプラテン5を代表として、本発明の一実施例を図1を参照して説明する。   An embodiment of the present invention will be described with reference to FIG. 1 as a representative of a platen 5 of a dot line printer using a hammer bank 1 in which the printing elements 1a are configured as a single array in the paper transport direction.

プラテン5の用紙搬送方向のフラット部幅を3mm以下程度とし、エッジ部5aと5bを用紙ガイド5cにより構成する円周半径Rの周上に一致させてプラテン5と用紙ガイド5cを固定するようにする。また、さらにハンマバンク1の印字素子1aがプラテン5を打撃する位置をエッジ部5aもしくはエッジ部5bから0.5mm程度とする。また、印字素子1aがプラテン5を打撃する位置は5aと5bとの中間の位置、すなわちプラテン5の用紙搬送方向におけるフラット部幅の中央またはその付近としてもよい。   The width of the flat portion of the platen 5 in the paper conveyance direction is set to about 3 mm or less, and the platen 5 and the paper guide 5c are fixed so that the edge portions 5a and 5b coincide with the circumference of the circumferential radius R formed by the paper guide 5c. To do. Further, the position where the printing element 1a of the hammer bank 1 strikes the platen 5 is set to about 0.5 mm from the edge portion 5a or the edge portion 5b. Further, the position at which the printing element 1a strikes the platen 5 may be an intermediate position between 5a and 5b, that is, the center of the flat portion width in the sheet conveyance direction or the vicinity thereof.

ドットラインプリンタに関わらず、シャトル動作にて印字を行う印刷装置にも適用できる。   Regardless of the dot line printer, the present invention can also be applied to a printing apparatus that performs printing by shuttle operation.

本発明の一実施例を示した印字機構の側面図である。It is a side view of a printing mechanism showing an embodiment of the present invention. 従来のドットラインプリンタの印字機構の側面図である。It is a side view of the printing mechanism of the conventional dot line printer. 従来のドットラインプリンタの印字機構の全体構成を示した斜視図である。It is the perspective view which showed the whole structure of the printing mechanism of the conventional dot line printer.

符号の説明Explanation of symbols

1はハンマバンク、1aは印字素子、2はインクリボン、3は用紙、4は紙送り機構、5はプラテン、5aと5bはエッジ部、5cは用紙ガイドである。
1 is a hammer bank, 1a is a printing element, 2 is an ink ribbon, 3 is paper, 4 is a paper feed mechanism, 5 is a platen, 5a and 5b are edge portions, and 5c is a paper guide.

Claims (3)

複数個の印字素子を搭載したハンマバンクと、前記ハンマバンクを桁方向に往復移動させるシャトル機構と、用紙搬送方向にペーパガイドを装着し、前記印字素子の印字力を保持するために設けられた打撃面がフラットなプラテンと、該プラテンに対して所定の入射角及び出射角をもって用紙が前記プラテンに所定のR曲率で巻き付くように配置した前記ペーパガイドに沿って搬送せしめる紙送り機構とを有し、前記印字素子と前記プラテンの間に前記用紙とインクリボンを配置して前記ハンマバンクにて印字を行うドットラインプリンタにおいて、前記プラテンのフラット部の用紙搬送方向に形成される上側及び下側のエッジ部を所定曲率の円周上に一致させたことを特徴とするドットラインプリンタ。   A hammer bank equipped with a plurality of printing elements, a shuttle mechanism for reciprocating the hammer bank in the digit direction, and a paper guide in the paper transport direction are provided to maintain the printing force of the printing elements. A platen having a flat striking surface, and a paper feed mechanism that conveys the paper along the paper guide disposed so that the paper is wound around the platen at a predetermined R curvature with a predetermined incident angle and an output angle. And a dot line printer in which the paper and the ink ribbon are arranged between the printing element and the platen to perform printing on the hammer bank, and an upper side and a lower side formed in the paper conveyance direction of the flat part of the platen. A dot line printer characterized in that the edge portion on the side coincides with the circumference of a predetermined curvature. 前記プラテンのフラット部の用紙搬送方向における幅を3mm以下としたことを特徴とする請求項1記載のドットラインプリンタ。   The dot line printer according to claim 1, wherein a width of the flat portion of the platen in the paper conveyance direction is 3 mm or less. 前記ハンマバンクの印字素子が前記プラテンを打撃する位置を、前記プラテンのフラット部の上側又は下エッジ部から0.5〜1mm程度の微小な距離としたことを特徴とする請求項1又は2記載のドットラインプリンタ。
The position at which the printing element of the hammer bank strikes the platen is set to a minute distance of about 0.5 to 1 mm from the upper or lower edge portion of the flat portion of the platen. Dot line printer.
JP2005371159A 2005-12-23 2005-12-23 Dot line printer Pending JP2007168336A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005371159A JP2007168336A (en) 2005-12-23 2005-12-23 Dot line printer

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JP2005371159A JP2007168336A (en) 2005-12-23 2005-12-23 Dot line printer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114314127A (en) * 2021-12-23 2022-04-12 郑州新世纪数码科技股份有限公司 Printer with paper feeding automatic deviation rectifying function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114314127A (en) * 2021-12-23 2022-04-12 郑州新世纪数码科技股份有限公司 Printer with paper feeding automatic deviation rectifying function
CN114314127B (en) * 2021-12-23 2023-08-04 郑州新世纪数码科技股份有限公司 Printer with automatic deviation correcting function for paper feeding

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