JP3463771B2 - Printing device - Google Patents
Printing deviceInfo
- Publication number
- JP3463771B2 JP3463771B2 JP22824294A JP22824294A JP3463771B2 JP 3463771 B2 JP3463771 B2 JP 3463771B2 JP 22824294 A JP22824294 A JP 22824294A JP 22824294 A JP22824294 A JP 22824294A JP 3463771 B2 JP3463771 B2 JP 3463771B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- platen
- printing
- opening
- tractor
- 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
Links
Landscapes
- Handling Of Sheets (AREA)
- Handling Of Continuous Sheets Of Paper (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は印字装置に係り、さらに
詳細には、この種装置の紙送り機構部において、印字用
紙の印字開始位置合せ時のプラテン開閉に伴う印字開始
位置ズレを従来よりも小さくした印字装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more specifically, in a paper feeding mechanism section of this type of apparatus, a printing start position shift due to opening and closing of a platen at the time of printing start position alignment of a printing paper is conventionally made. It also relates to a printing device that is smaller.
【０００２】[0002]
【従来の技術】印字装置の紙送り機構部に具備すべき機
能について、図４を参照して以下に詳述する。2. Description of the Related Art The functions that a paper feed mechanism of a printing apparatus should have will be described in detail below with reference to FIG.
【０００３】紙送り機構部が具備すべき機能は以下の４
項目である。The functions that the paper feed mechanism section should have are as follows.
It is an item.
【０００４】第１に、印字用紙１をドット行間隔で搬送
する機能である。そのため、印字用紙１を掛けた一対の
紙送りトラクタ２を、一般的にタイミングベルト３を介
して紙送りモータ（例えばステッピングモータ）４によ
り搬送する。通常、印字用紙１の送り速度を高くするた
めには、印字用紙１の最小送り量を１ドット行分とし、
紙送りモータ４の最小回転角度を回転させたときに印字
用紙１の最小送り量に相当するように設定する。First, there is a function of conveying the printing paper 1 at dot line intervals. Therefore, a pair of paper feed tractors 2 on which the print paper 1 is applied is generally conveyed by a paper feed motor (for example, a stepping motor) 4 via a timing belt 3. Normally, in order to increase the feeding speed of the printing paper 1, the minimum feeding amount of the printing paper 1 is set to 1 dot line,
It is set so as to correspond to the minimum feed amount of the print paper 1 when the minimum rotation angle of the paper feed motor 4 is rotated.
【０００５】第２に、ドット印字用印字ハンマを多数個
配設したハンマバンク５の印字力を支持する機能であ
る。ハンマバンク５の印字力を支持するためには、一般
的に金属シャフトの外周に硬質ゴムを被覆したプラテン
６が用いられ、プラテン６は、印字用紙１の走行用ガイ
ドも兼ねている。なお、ハンマバンク５と印字用紙１と
の間には、インクを含浸したインクリボン７が配設され
ている。Secondly, it has a function of supporting the printing power of the hammer bank 5 provided with a large number of dot printing printing hammers. In order to support the printing force of the hammer bank 5, a platen 6 having a metal shaft coated with hard rubber is generally used, and the platen 6 also serves as a guide for running the printing paper 1. An ink ribbon 7 impregnated with ink is arranged between the hammer bank 5 and the printing paper 1.
【０００６】第３に、ハンマバンク５に配設した印字ハ
ンマの印字ピン先端と、プラテン６との間隔（以下、ハ
ンマギャップと呼ぶ）を所定値に設定するためのハンマ
ギャップ設定機能である。この種の印字装置には、厚さ
の異なる種々の印字用紙１が使用される。印字ハンマの
印字特性を最適状態にするためには、種々の印字用紙１
の厚さに応じてハンマギャップを調整しなければならな
い。そのためにはＦＴカム８を回転させてハンマギャッ
プを変化させる。プラテン開閉カム１１は、プラテン６
を配設した紙送りユニット１２を一定の力でＦＴカム８
の方向に押し付け、かつガタが発生しないようにスプリ
ング１０をＦＴカム８とプラテン開閉シャフト９との間
に設けている。Thirdly, there is a hammer gap setting function for setting a distance (hereinafter referred to as a hammer gap) between the platen 6 and the printing pin tip of the printing hammer arranged in the hammer bank 5 to a predetermined value. Various printing papers 1 having different thicknesses are used in this type of printing apparatus. In order to optimize the printing characteristics of the printing hammer, various printing papers 1
The hammer gap must be adjusted according to the thickness of the. For that purpose, the FT cam 8 is rotated to change the hammer gap. The platen opening / closing cam 11 is the platen 6
The paper feed unit 12 provided with the FT cam 8 with a constant force.
A spring 10 is provided between the FT cam 8 and the platen opening / closing shaft 9 so that the spring 10 is pressed in the direction of and the backlash does not occur.
【０００７】第４に、印字用紙１およびインクリボン７
を脱着するためのプラテン６の開閉機能である。プラテ
ン６の開閉とは、プラテン６をハンマバンク５から大き
く離したり、元のハンマギャップに戻したりすることで
ある。そのためには、プラテン開閉カム１１を、プラテ
ン開閉レバー（図示省略）を介して図示の時計回り方向
に回動させる。これにより、プラテン６を配設した紙送
りユニット１２全体が、紙送りサイドフレーム１４との
間に配設された軸受（図示省略）を介し、トラクタ駆動
軸１３を中心として回動する。Fourthly, the printing paper 1 and the ink ribbon 7
This is an opening / closing function of the platen 6 for attaching and detaching. The opening and closing of the platen 6 means that the platen 6 is largely separated from the hammer bank 5 or is returned to the original hammer gap. For that purpose, the platen opening / closing cam 11 is rotated in the clockwise direction in the drawing via a platen opening / closing lever (not shown). As a result, the entire paper feed unit 12 provided with the platen 6 rotates about the tractor drive shaft 13 via a bearing (not shown) provided between the platen 6 and the paper feed side frame 14.
【０００８】プラテン６の開閉は、通常、印字用紙１お
よびインクリボン７の脱着時に使用される。特に、印字
開始前におこなう印字用紙１上の印字開始位置セット
は、トラクタ２の印字用紙搬送面に対し、或る角度をな
すペーパガイド１５の上面に位置する印字用紙先頭位置
合せ用スケール（図示省略）の、印字用紙１の縦方向長
さを表わす適正目盛に、印字用紙１の先頭をたるみがな
いように合わせることでおこなう。The opening and closing of the platen 6 is usually used when the printing paper 1 and the ink ribbon 7 are attached and detached. In particular, the print start position setting on the print paper 1 performed before the start of printing is performed by a print paper leading edge alignment scale (shown in the figure) which is located on the upper surface of the paper guide 15 which makes an angle with the print paper transport surface of the tractor 2. This is done by aligning the leading end of the printing paper 1 with an appropriate scale (omitted) indicating the length of the printing paper 1 in the vertical direction so that there is no slack.
【０００９】なお、プラテン６の開閉は、印字用紙１お
よびインクリボン７の脱着作業だけでなく、ハンマバン
ク５およびその下方の清掃や保守作業等にも使用される
ことが多いため、かなり大きなプラテン開閉量を設定し
ている。Since the opening and closing of the platen 6 is often used not only for attaching and detaching the printing paper 1 and the ink ribbon 7, but also for cleaning the hammer bank 5 and its lower part, maintenance work and the like, a considerably large platen is used. The opening and closing amount is set.
【００１０】[0010]
【発明が解決しようとする課題】印字装置の紙送り機構
部において、プラテン６の開閉量は、ハンマバンク５お
よびその下方の清掃や保守作業等を容易におこなえるよ
う設定しなければならないことについては既述した。In the paper feeding mechanism of the printing apparatus, the opening / closing amount of the platen 6 must be set so that cleaning and maintenance work of the hammer bank 5 and the lower part thereof can be easily performed. As mentioned above.
【００１１】通常、ハンマバンク５およびその下方の清
掃や保守作業等は手作業でおこなわなければならないこ
ともあり、プラテン６の開閉量を少なくとも３０ｍｍ程
度確保することが必要である。しかし、トラクタ駆動軸
１３を中心としてプラテン６を配設する紙送りユニット
１２全体を回動させるという形式の印字装置において、
印字装置の電源遮断時、印字用紙１の印字開始位置セッ
トをおこなった後にプラテン６の開閉をおこなうと、ト
ラクタ駆動軸１３上の摩擦トルクが、紙送りモータ４の
トラクタ駆動軸１３を保持するトルク（以下、ディテン
トトルクと呼ぶ）より大きくなることによるトラクタ駆
動軸１３の回転ズレが発生する。Usually, cleaning and maintenance of the hammer bank 5 and the lower part of the hammer bank 5 may have to be done manually, and it is necessary to secure an opening / closing amount of the platen 6 of at least about 30 mm. However, in the printing apparatus of the type in which the entire paper feeding unit 12 in which the platen 6 is arranged is rotated around the tractor drive shaft 13,
When the printing start position of the printing paper 1 is set and the platen 6 is opened / closed when the power of the printing device is cut off, the friction torque on the tractor drive shaft 13 causes the torque that holds the tractor drive shaft 13 of the paper feed motor 4. (Hereinafter, referred to as detent torque.) Rotational deviation of the tractor drive shaft 13 due to a larger torque occurs.
【００１２】なお、前記現象は、印字用紙１の最小送り
量が、紙送りモータ４の最小回転角度を回転させたとき
の印字用紙１の送り量に相当するようにするため、紙送
りモータ４とトラクタ駆動軸１３との回転速度比が小さ
くなり、トルク伝達率が小さいために発生する。The above-mentioned phenomenon is such that the minimum feed amount of the print paper 1 corresponds to the feed amount of the print paper 1 when the minimum rotation angle of the paper feed motor 4 is rotated. Occurs because the rotation speed ratio between the tractor drive shaft 13 and the tractor drive shaft 13 becomes small and the torque transmission rate is small.
【００１３】また、トラクタ駆動軸１３の回転ズレと同
時に、印字用紙１の走行経路の変化も発生し、これらが
原因となって、紙送りトラクタ２に掛かっている印字用
紙１は、ペーパガイド１５上に貼り付けられているスケ
ールで位置合わせした印字開始の初期位置に対し印字位
置ズレとなり、印字装置の電源遮断時におけるプラテン
６の開閉に伴い、印字用紙１の印字開始位置がズレると
いう問題が発生していた。At the same time as the rotation of the tractor drive shaft 13 deviates, the traveling path of the printing paper 1 also changes, which causes the printing paper 1 hanging on the paper feed tractor 2 to move to the paper guide 15. There is a problem that the printing position is displaced from the initial position of the printing start aligned with the scale attached on the scale, and the printing start position of the printing paper 1 is displaced due to the opening and closing of the platen 6 when the power of the printing device is shut off. Had occurred.
【００１４】本発明の目的は、印字装置のプラテン開閉
に伴う印字用紙１の印字開始位置ズレを従来よりも小さ
くした、改良された印字装置を提供することにある。It is an object of the present invention to provide an improved printing apparatus in which the printing start position deviation of the printing paper 1 due to the opening and closing of the platen of the printing apparatus is made smaller than before.
【００１５】[0015]
【課題を解決するための手段】すなわち、本発明は、先
に述べた印字装置において、電源遮断時のプラテン開閉
動作に伴う印字用紙１の印字開始位置ズレが、トラクタ
駆動軸１３上の摩擦トルクに対する紙送りモータ４のデ
ィテントトルクの大きさや、紙送りトラクタ２の後方に
位置するガイド１５の突出量にもとづく印字用紙１の走
行経路の変化量、さらにはトラクタ駆動軸１３を回転中
心とするプラテン６の開閉量の３種により決定されるこ
とに着目し、印字用紙１の印字開始位置ズレを発生させ
ないために、紙送りモータ４のディテントトルクの大き
さ、または印字用紙１の走行面に対するペーパガイド１
５の突出量、さらにはプラテン６の開閉量を調整する手
段のうち、少なくとも１つの手段を採用ようにしたもの
である。That is, according to the present invention, in the above-described printing apparatus, the print start position shift of the print sheet 1 due to the platen opening / closing operation when the power is cut off causes the friction torque on the tractor drive shaft 13. The amount of detent torque of the paper feed motor 4 and the amount of change in the travel path of the print sheet 1 based on the amount of protrusion of the guide 15 located behind the paper feed tractor 2, and the platen having the tractor drive shaft 13 as the center of rotation. Focusing on the fact that it is determined by three types of opening and closing amounts of No. 6, the detent torque of the paper feed motor 4 or the paper relative to the running surface of the printing paper 1 is set in order to prevent the printing start position deviation of the printing paper 1. Guide 1
At least one of the means for adjusting the protrusion amount of the platen 5 and the opening / closing amount of the platen 6 is adopted.
【００１６】[0016]
【作用】本発明によれば、紙送りモータ４のディテント
トルクを、モータ４の軸換算によるトラクタ駆動軸１３
上の摩擦トルクより大きくすることにより、印字装置の
電源遮断時におけるプラテン６の開閉に伴う印字用紙１
の印字開始位置ズレを防止できる。According to the present invention, the detent torque of the paper feed motor 4 is converted into the axis of the motor 4, and the tractor drive shaft 13 is converted.
By making the friction torque larger than the upper friction torque, the printing paper 1 accompanying the opening and closing of the platen 6 when the power source of the printing device is cut off
It is possible to prevent the deviation of the print start position.
【００１７】また、紙送りトラクタ２の後方に位置する
ペーパガイド１５の先端位置を、印字用紙１の印字開始
位置セット状態における用紙走行経路上に設置すること
により、図２に示すように、印字用紙１の先端がペーパ
ガイド１５に衝突して用紙ジャムが発生することなく、
しかも印字用紙１の印字開始位置セット状態における当
該用紙１の走行経路長Ｌ1と、プラテン６の開状態にお
ける印字用紙１の走行経路長Ｌ2との差Ｌ2−Ｌ1分の距
離を微小にし、ひいては印字用紙１の印字開始位置ズレ
を従来よりも小さくすることができる。Further, by installing the tip end position of the paper guide 15 located behind the paper feed tractor 2 on the paper traveling path in the print start position set state of the print paper 1, as shown in FIG. The leading edge of the sheet 1 does not collide with the paper guide 15 to cause a sheet jam,
Moreover minute and travel path length L 1 of the sheet 1 at the printing start position set state of the print sheet 1, the difference between L 2 -L distance of one half of the travel path length L 2 of the printing paper 1 in the opened state of the platen 6 Further, the deviation of the printing start position of the printing paper 1 can be made smaller than before.
【００１８】さらに、プラテン６の開閉手段を、印字用
紙１およびインクリボン７の脱着に必要な第１のプラテ
ン開閉量と、ハンマバンク５およびその下方の清掃や保
守作業のために必要な、第１のプラテン開閉量よりも大
きな第２のプラテン開閉量との２段階開閉式とし、印字
用紙１やインクリボン７の脱着といった使用頻度の高い
通常使用時には、プラテン６の開閉量の少ない第１段階
目を選択する、つまり図３において、印字用紙１の印字
開始位置ズレ量の大きなＬ3−Ｌ1に比べて、その位置ズ
レ量の小さなＬ2−Ｌ1を多用的に選択することにより、
これまた印字用紙１の印字開始位置ズレを従来よりも小
さくすることができる。Further, the opening / closing means of the platen 6 is a first platen opening / closing amount required for attaching / detaching the printing paper 1 and the ink ribbon 7 and a first platen opening / closing amount necessary for cleaning and maintenance work of the hammer bank 5 and its lower part. A two-stage opening / closing type with a second platen opening / closing amount larger than the platen opening / closing amount of 1 is used, and the first stage with a small opening / closing amount of the platen 6 is used during normal use with high usage frequency such as attachment / detachment of the printing paper 1 and the ink ribbon 7. By selecting the eyes, that is, in FIG. 3, by making a versatile selection of L 2 -L 1 having a small amount of positional deviation as compared to L 3 -L 1 having a large amount of positional deviation of the printing start position of the printing paper 1,
Further, the deviation of the print start position of the print sheet 1 can be made smaller than in the conventional case.
【００１９】[0019]
【実施例】本発明の一実施例を図１を参照して説明す
る。なお、以下に詳述する部分を除き、本発明と従来技
術とは同一であるので、その説明を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. Since the present invention and the prior art are the same except for the parts described in detail below, the description thereof will be omitted.
【００２０】図１において、通常印字動作時、紙送りモ
ータ４の駆動力は、タイミングベルト３を介してトラク
タ２に伝達され、印字用紙１を搬送する。これとは反対
に、プラテン６を配設した紙送りユニット１２がトラク
タ駆動軸１３を中心として回動するプラテン６の開閉
時、トラクタ駆動軸１３上の摩擦トルクは、タイミング
ベルト３を介して紙送りモータ４に伝達される。したが
って、紙送りモータ４の軸換算によるプラテン６の開閉
に伴う摩擦トルクよりも、紙送りモータ４のディテント
トルクを大きくすれば、印字装置の電源遮断時、プラテ
ン６の開閉に伴う摩擦トルクを打ち消すことができ、プ
ラテン６の開閉に連動して紙送りモータ４が回転するこ
とはなくなる。その結果、印字用紙１の印字開始位置セ
ット後、電源遮断時におけるプラテン６の開閉に伴うト
ラクタ駆動軸１３上の摩擦によって発生する印字用紙１
の印字開始位置ズレはなくなる。In FIG. 1, during the normal printing operation, the driving force of the paper feed motor 4 is transmitted to the tractor 2 via the timing belt 3 to convey the printing paper 1. On the contrary, when the paper feeding unit 12 having the platen 6 is rotated about the tractor drive shaft 13 when the platen 6 is opened and closed, the friction torque on the tractor drive shaft 13 is transmitted via the timing belt 3 to the paper. It is transmitted to the feed motor 4. Therefore, if the detent torque of the paper feed motor 4 is made larger than the friction torque associated with the opening / closing of the platen 6 due to the axis conversion of the paper feed motor 4, the friction torque associated with the opening / closing of the platen 6 is canceled when the power of the printing device is shut off. Therefore, the paper feed motor 4 does not rotate in association with the opening and closing of the platen 6. As a result, after the printing start position of the printing paper 1 is set, the printing paper 1 is generated due to the friction on the tractor drive shaft 13 due to the opening and closing of the platen 6 when the power is cut off.
There is no deviation in the print start position.
【００２１】さらに、図２には、印字用紙１の印字開始
位置セット状態と、プラテン６の開状態における、紙送
りトラクタ２からペーパガイド１５の先端までの印字用
紙１の走行経路長の変化が示されているが、前記走行経
路長は、印字用紙１の印字開始位置セット状態では
Ｌ1、プラテン６の開状態ではＬ2となり、プラテン６の
開閉動作により、Ｌ2−Ｌ1分の印字用紙１の印字開始位
置ズレが発生する。Further, FIG. 2 shows the change in the traveling path length of the print sheet 1 from the paper feed tractor 2 to the tip of the paper guide 15 in the state where the print start position of the print sheet 1 is set and the platen 6 is opened. Although shown, the running path length is L 1 when the print start position of the print sheet 1 is set and L 2 when the platen 6 is open. By opening and closing the platen 6, printing of L 2 -L 1 is performed. The print start position of the paper 1 is displaced.
【００２２】また、ペーパガイド１５の先端は、印字用
紙１との衝突による用紙ジャムが発生しない位置に設置
しなければならない。例えば、ペーパガイド１５の先端
を、印字用紙１の印字開始位置セット状態の走行経路よ
りも突出した位置にセットすると、印字用紙１の先頭が
ペーパガイド１５に衝突して用紙ジャムの原因となる。
これとは反対に、ペーパガイド１５の先端を、印字用紙
１の印字開始位置セット状態の走行経路に届かない位置
にセットすると、前述したＬ2−Ｌ1分の距離が大きくな
り、印字用紙１の印字開始位置ズレを増加させることに
なる。したがって、前記Ｌ2−Ｌ1分の距離を最も微小に
し、かつ印字用紙１のジャムを発生させないようにする
ためには、ペーパガイド１５の先端位置を、印字用紙１
の印字開始位置セット状態における走行経路上に設置す
ることが最適となる。Further, the leading end of the paper guide 15 must be installed at a position where paper jam due to collision with the printing paper 1 does not occur. For example, if the leading end of the paper guide 15 is set at a position projecting from the traveling path of the print start position of the print paper 1, the leading end of the print paper 1 collides with the paper guide 15 and causes a paper jam.
On the contrary, when the leading end of the paper guide 15 is set at a position that does not reach the running path of the print start position setting state of the print sheet 1, the above-mentioned distance of L 2 -L 1 becomes large and the print sheet 1 Therefore, the deviation of the print start position of will be increased. Therefore, in order to minimize the distance of L 2 -L 1 and prevent jamming of the printing paper 1, the tip position of the paper guide 15 is set to the printing paper 1
It is optimal to install it on the traveling route in the print start position set state.
【００２３】さらに、図３に示すように、印字用紙１の
印字開始位置セット状態における紙送りトラクタ２から
ガイド１５までの印字用紙経路長をＬ1とすると、その
経路長は、印字用紙１やインクリボン７の脱着時にはＬ
2、ハンマバンク５およびその下方の清掃や保守作業時
にはＬ3に変化し、印字用紙１の印字開始位置ズレ量
は、Ｌ2−Ｌ1に比べてＬ3−Ｌ1の方が大きくなる。この
ため、プラテン６の開閉を、印字用紙１やインクリボン
７の脱着といった使用頻度の高い、通常使用時を１段階
目、ハンマバンク５およびその下方の清掃や保守作業と
いった使用頻度の少ない、通常以外の使用時を２段階目
とする、プラテン２段階開閉式を採用すると良い。Further, as shown in FIG. 3, when the print paper path length from the paper feed tractor 2 to the guide 15 when the print start position of the print paper 1 is set is L 1 , the path length is When attaching and detaching the ink ribbon 7, L
2, at the time of cleaning and maintenance of the hammer bank 5 and lower changes in L 3, the print start position shift amount of the printing paper 1, towards the L 3 -L 1 is larger than the L 2 -L 1. For this reason, opening and closing the platen 6 is frequently used, such as when the printing paper 1 and the ink ribbon 7 are attached and detached, is the first stage during normal use, and is used less frequently such as cleaning and maintenance work of the hammer bank 5 and its lower part. It is recommended to adopt a platen two-stage open / close type, which is the second stage when not used.
【００２４】[0024]
【発明の効果】本発明によれば、紙送りモータ４のディ
テントトルクを、モータ４の軸換算によるトラクタ駆動
軸１３上の摩擦トルクより大きくすることにより、印字
装置の電源遮断時におけるプラテン６の開閉に伴う印字
用紙１の印字開始位置ズレを防止できる。According to the present invention, the detent torque of the paper feed motor 4 is made larger than the friction torque on the tractor drive shaft 13 due to the shaft conversion of the motor 4, so that the platen 6 of the platen 6 when the power supply of the printer is shut off. It is possible to prevent the printing start position shift of the printing paper 1 due to opening and closing.
【００２５】また、紙送りトラクタ２の後方に位置する
ペーパガイド１５の先端位置を、印字用紙１の印字開始
位置セット状態における用紙走行経路上に設置すること
により、図２に示すように、印字用紙１の先端がペーパ
ガイド１５に衝突して用紙ジャムが発生することなく、
しかも印字用紙１の印字開始位置セット状態における当
該用紙１の走行経路長Ｌ1と、プラテン６の開状態にお
ける印字用紙１の走行経路長Ｌ2との差Ｌ2−Ｌ1分の距
離を微小にし、ひいては印字用紙１の印字開始位置ズレ
を従来よりも小さくすることができる。By setting the tip end position of the paper guide 15 located behind the paper feed tractor 2 on the paper traveling path in the print start position set state of the print paper 1, as shown in FIG. The leading edge of the sheet 1 does not collide with the paper guide 15 to cause a sheet jam,
Moreover minute and travel path length L 1 of the sheet 1 at the printing start position set state of the print sheet 1, the difference between L 2 -L distance of one half of the travel path length L 2 of the printing paper 1 in the opened state of the platen 6 Further, the deviation of the printing start position of the printing paper 1 can be made smaller than before.
【００２６】さらに、プラテン６の開閉手段を、印字用
紙１およびインクリボン７の脱着に必要な第１のプラテ
ン開閉量と、ハンマバンク５およびその下方の清掃や保
守作業のために必要な、第１のプラテン開閉量よりも大
きな第２のプラテン開閉量との２段階開閉式とし、印字
用紙１やインクリボン７の脱着といった使用頻度の高い
通常使用時には、プラテン６の開閉量の少ない第１段階
目を選択する、つまり図３において、印字用紙１の印字
開始位置ズレ量の大きなＬ3−Ｌ1に比べて、その位置ズ
レ量の小さなＬ2−Ｌ1を多用的に選択することにより、
これまた印字用紙１の印字開始位置ズレを従来よりも小
さくすることができる。Further, the opening / closing means of the platen 6 is provided with a first platen opening / closing amount required for attachment / detachment of the printing paper 1 and the ink ribbon 7 and a first platen opening / closing amount required for cleaning and maintenance work of the hammer bank 5 and its lower part. A two-stage opening / closing type with a second platen opening / closing amount larger than the platen opening / closing amount of 1 is used, and the first stage with a small opening / closing amount of the platen 6 is used during normal use with high usage frequency such as attachment / detachment of the printing paper 1 and the ink ribbon 7. By selecting the eyes, that is, in FIG. 3, by making a versatile selection of L 2 -L 1 having a small amount of positional deviation as compared to L 3 -L 1 having a large amount of positional deviation of the printing start position of the printing paper 1,
Further, the deviation of the print start position of the print sheet 1 can be made smaller than in the conventional case.
【００２７】以上要するに、本発明によれば、コスト増
とならず操作性の高い印字装置を提供することが可能と
なる。In summary, according to the present invention, it is possible to provide a printing apparatus which has high operability without increasing the cost.
【図１】 本発明の一実施例を示す、ハンマバンクの往
復移動方向から見た正面図である。FIG. 1 is a front view showing an embodiment of the present invention as seen from a reciprocating direction of a hammer bank.
【図２】 本発明の他の実施例を示す、ハンマバンクの
往復移動方向から見た正面図である。FIG. 2 is a front view showing another embodiment of the present invention as seen from the reciprocating direction of the hammer bank.
【図３】 本発明のさらに他の実施例を示す、ハンマバ
ンクの往復移動方向から見た正面図である。FIG. 3 is a front view showing a hammer bank according to still another embodiment of the present invention as viewed from the reciprocating direction.
【図４】 従来例をハンマバンクの往復移動方向から見
た正面図である。FIG. 4 is a front view of a conventional example seen from a reciprocating direction of a hammer bank.
１…印字用紙、２…トラクタ、４…紙送りモータ、６…
プラテン、７…インクリボン、１３…トラクタ駆動軸、
１５…ペーパガイド。1 ... Printing paper, 2 ... Tractor, 4 ... Paper feed motor, 6 ...
Platen, 7 ... Ink ribbon, 13 ... Tractor drive shaft,
15 ... Paper guide.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中原 慎吾 茨城県勝田市武田1060番地 日立工機株 式会社内 (72)発明者 谷下田 幸一 茨城県勝田市武田1060番地 日立工機株 式会社内 (72)発明者 篠原 誠 茨城県勝田市武田1060番地 日立工機株 式会社内 (56)参考文献 特開 昭62−77962（ＪＰ，Ａ) 特開 昭63−114680（ＪＰ，Ａ) 特開 平６−143707（ＪＰ，Ａ) 特開 平５−162395（ＪＰ，Ａ) 実開 昭63−141742（ＪＰ，Ｕ) 実開 平１−62054（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B41J 11/14 B41J 11/00 B41J 11/26 B41J 15/04 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shingo Nakahara 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd. (72) Inventor Makoto Shinohara 1060 Takeda, Katsuta City, Ibaraki Inside Hitachi Koki Co., Ltd. (56) Reference JP 62-77962 (JP, A) JP 63-114680 (JP, A) JP Flat 6-143707 (JP, A) JP 5-162395 (JP, A) Actually open 63-141742 (JP, U) Actually open 1-62054 (JP, U) (58) Fields investigated (Int .Cl. 7 , DB name) B41J 11/14 B41J 11/00 B41J 11/26 B41J 15/04
Claims (7)
ンクと、ハンマバンクを桁方向に往復移動させるための
シャトル機構と、印字用紙を搬送するトラクタと、印字
ハンマの印字力支持用プラテンを備えたプラテンユニッ
トと、トラクタに駆動力を与えるための紙送りモータを
配設した紙送りフレームおよびプラテンユニットをトラ
クタ駆動軸によって連結し、かつプラテンをドット印字
用ハンマに近接するセット位置から退避させるためにト
ラクタ駆動軸を回転中心としたプラテン開閉手段と、ト
ラクタの後方に位置し、トラクタ上に掛けられた印字用
紙の走行面に対し角度をなして設けられたペーパガイド
とを有し、ペーパガイドに設けられた印字用紙先頭位置
合せ用スケールにより印字開始位置合わせをおこない、
トラクタによる印字用紙の最小送り量を、紙送りモータ
の制御可能な最小回転角度に設定した印字装置におい
て、 印字装置の電源遮断時におけるプラテン開閉に伴うトラ
クタ駆動軸上の摩擦トルクよりも紙送りモータのディテ
ントトルクを大きく設定したことを特徴とする印字装
置。1. A hammer bank equipped with a dot printing hammer, a shuttle mechanism for reciprocating the hammer bank in the digit direction, a tractor for conveying printing paper, and a platen for supporting the printing force of the printing hammer. In order to connect the platen unit, the paper feed frame that has the paper feed motor for giving the driving force to the tractor and the platen unit by the tractor drive shaft, and to retract the platen from the set position close to the dot printing hammer. It has a platen opening / closing means with the tractor drive shaft as the center of rotation, and a paper guide that is located behind the tractor and is formed at an angle with respect to the running surface of the printing paper that is hung on the tractor. The print start position is adjusted by the scale for adjusting the leading position of the print paper.
In a printing device in which the minimum feed amount of printing paper by the tractor is set to the minimum rotation angle that can control the paper feed motor, the paper feed motor is more than the friction torque on the tractor drive shaft that accompanies opening and closing the platen when the power of the printing device is shut off. A printing device characterized in that the detent torque of is set to a large value.
ンクと、ハンマバンクを桁方向に往復移動させるための
シャトル機構と、印字用紙を搬送するトラクタと、印字
ハンマの印字力支持用プラテンを備えたプラテンユニッ
トと、トラクタに駆動力を与えるための紙送りモータを
配設した紙送りフレームおよびプラテンユニットをトラ
クタ駆動軸によって連結し、かつプラテンをドット印字
用ハンマに近接するセット位置から退避させるためにト
ラクタ駆動軸を回転中心としたプラテン開閉手段と、ト
ラクタの後方に位置し、トラクタ上に掛けられた印字用
紙の走行面に対し角度をなして設けられたペーパガイド
とを有し、ペーパガイドに設けられた印字用紙先頭位置
合せ用スケールにより印字開始位置合わせをおこなう印
字装置において、 トラクタの後方に位置するペーパガイドの先端位置を、
印字用紙の印字開始位置セット状態における用紙走行経
路上に設置したことを特徴とする印字装置。2. A hammer bank equipped with a dot printing hammer, a shuttle mechanism for reciprocating the hammer bank in the digit direction, a tractor for transporting printing paper, and a platen for supporting the printing force of the printing hammer. In order to connect the platen unit, the paper feed frame that has the paper feed motor for giving the driving force to the tractor and the platen unit by the tractor drive shaft, and to retract the platen from the set position close to the dot printing hammer. It has a platen opening / closing means with the tractor drive shaft as the center of rotation, and a paper guide that is located behind the tractor and is formed at an angle with respect to the running surface of the printing paper that is hung on the tractor. In the printing device that adjusts the print start position by the provided scale for adjusting the top position of the print paper, The paper guide tip position located behind the Rakuta,
A printing apparatus, which is installed on a paper traveling path in a state where a printing start position of a printing paper is set.
ンクと、ハンマバンクを桁方向に往復移動させるための
シャトル機構と、印字用紙を搬送するトラクタと、印字
ハンマの印字力支持用プラテンを備えたプラテンユニッ
トと、トラクタに駆動力を与えるための紙送りモータを
配設した紙送りフレームおよびプラテンユニットをトラ
クタ駆動軸によって連結し、かつプラテンをドット印字
用ハンマに近接するセット位置から退避させるためにト
ラクタ駆動軸を回転中心としたプラテン開閉手段と、ト
ラクタの後方に位置し、トラクタ上に掛けられた印字用
紙の走行面に対し角度をなして設けられたペーパガイド
とを有し、ペーパガイドに設けられた印字用紙先頭位置
合せ用スケールにより印字開始位置合わせをおこなう印
字装置において、 プラテン開閉手段を、印字用紙およびインクリボンの脱
着に必要な第１のプラテン開閉量と、ハンマバンクおよ
びその下方の清掃や保守作業のために必要な、第１のプ
ラテン開閉量よりも大きな第２のプラテン開閉量との２
段階開閉式としたことを特徴とする印字装置。3. A hammer bank equipped with a dot printing hammer, a shuttle mechanism for reciprocating the hammer bank in the digit direction, a tractor for conveying printing paper, and a platen for supporting the printing force of the printing hammer. In order to connect the platen unit, the paper feed frame that has the paper feed motor for giving the driving force to the tractor and the platen unit by the tractor drive shaft, and to retract the platen from the set position close to the dot printing hammer. It has a platen opening / closing means with the tractor drive shaft as the center of rotation, and a paper guide that is located behind the tractor and is formed at an angle with respect to the running surface of the printing paper that is hung on the tractor. In the printing device that adjusts the print start position by the provided scale for adjusting the top position of the print paper, The Latin opening / closing means includes a first platen opening / closing amount required for attachment / detachment of the printing paper and the ink ribbon and a second platen opening / closing amount required for cleaning and maintenance work of the hammerbank and the lower part thereof. 2 with platen opening and closing
A printing device characterized by being of a step opening / closing type.
置するペーパガイドの先端位置を、印字用紙の印字開始
位置セット状態における用紙走行経路上に設置したこと
を特徴とする印字装置。4. The printer according to claim 1, wherein the tip end position of the paper guide located behind the tractor is installed on the paper traveling path in the print start position set state of the print paper.
を、印字用紙およびインクリボンの脱着に必要な第１の
プラテン開閉量と、ハンマバンクおよびその下方の清掃
や保守作業のために必要な、第１のプラテン開閉量より
も大きな第２のプラテン開閉量との２段階開閉式とした
ことを特徴とする印字装置。5. The platen opening / closing means according to claim 1, wherein the platen opening / closing means is a first platen opening / closing amount necessary for attachment / detachment of a printing paper and an ink ribbon, and a cleaning amount for cleaning the hammer bank and its lower part and maintenance work. A printing device characterized in that it is of a two-stage opening / closing type with a second platen opening / closing amount larger than the platen opening / closing amount of 1.
を、印字用紙およびインクリボンの脱着に必要な第１の
プラテン開閉量と、ハンマバンクおよびその下方の清掃
や保守作業のために必要な、第１のプラテン開閉量より
も大きな第２のプラテン開閉量との２段階開閉式とした
ことを特徴とする印字装置。6. The platen opening / closing means according to claim 2, wherein the platen opening / closing means is a first platen opening / closing amount required for attachment / detachment of a printing paper and an ink ribbon, and a necessary amount for cleaning and maintenance work of the hammer bank and its lower part. A printing device characterized in that it is of a two-stage opening / closing type with a second platen opening / closing amount larger than the platen opening / closing amount of 1.
置するペーパガイドの先端位置を、印字用紙の印字開始
位置セット状態における用紙走行経路上に設置し、かつ
プラテン開閉手段を、印字用紙およびインクリボンの脱
着に必要な第１のプラテン開閉量と、ハンマバンクおよ
びその下方の清掃や保守作業のために必要な、第１のプ
ラテン開閉量よりも大きな第２のプラテン開閉量との２
段階開閉式としたことを特徴とする印字装置。7. The paper guide according to claim 1, wherein the front end position of the paper guide located behind the tractor is installed on the paper traveling path in the print start position set state of the print paper, and the platen opening / closing means is provided for the print paper and the ink. The first platen opening / closing amount required for attaching / detaching the ribbon and the second platen opening / closing amount required for cleaning and maintenance work of the hammerbank and the lower part thereof are larger than the first platen opening / closing amount.
A printing device characterized by being of a step opening / closing type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22824294A JP3463771B2 (en) | 1994-09-22 | 1994-09-22 | Printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22824294A JP3463771B2 (en) | 1994-09-22 | 1994-09-22 | Printing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0890851A JPH0890851A (en) | 1996-04-09 |
| JP3463771B2 true JP3463771B2 (en) | 2003-11-05 |
Family
ID=16873392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22824294A Expired - Lifetime JP3463771B2 (en) | 1994-09-22 | 1994-09-22 | Printing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3463771B2 (en) |
-
1994
- 1994-09-22 JP JP22824294A patent/JP3463771B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0890851A (en) | 1996-04-09 |
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