JPS6270057A - Carriage mechanism in line printer - Google Patents

Carriage mechanism in line printer

Info

Publication number
JPS6270057A
JPS6270057A JP21130885A JP21130885A JPS6270057A JP S6270057 A JPS6270057 A JP S6270057A JP 21130885 A JP21130885 A JP 21130885A JP 21130885 A JP21130885 A JP 21130885A JP S6270057 A JPS6270057 A JP S6270057A
Authority
JP
Japan
Prior art keywords
shuttle
linear motor
motor
force
arms
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
JP21130885A
Other languages
Japanese (ja)
Inventor
Katsumi Yoshitani
克美 吉谷
Hideki Fukusono
福園 秀樹
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 Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP21130885A priority Critical patent/JPS6270057A/en
Publication of JPS6270057A publication Critical patent/JPS6270057A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00Actions or mechanisms not otherwise provided for
    • B41J25/001Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B41J25/006Mechanisms for bodily moving print heads or carriages parallel to the paper surface for oscillating, e.g. page-width print heads provided with counter-balancing means or shock absorbers

Landscapes

  • Impact Printers (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)

Abstract

PURPOSE:To increase the rebound force of a shuttle at its stroke ends, by a method wherein the rebound force of the shuttle by a linear motor is supplemented by a spring force. CONSTITUTION:A shuttle 3 consists of; a printing block base 3a, sliders 3b which are set at the ends of the base 3a and reciprocated along a fixed shaft 2, two arms 3c projecting from the ends of the base 3a in parallel with each other, and a movable shaft 3d for a liner motor 4 supported by the arms 3c. The linear motor 4 reciprocates the shuttle 3 along the fixed shaft 2 with an alternating pulse current supplied to the motor. Coil springs 6 are provided respectively between bearings 5 supporting the movable shaft 3d at the ends of the linear motor 4, and the arms 3c. The natural frequency determined by the mass of the total shuttle including a printing block and the spring constant of the coil springs 6 is synchronized with the pulse frequency exciting the linear motor 4. Thus, the resultant force of the spring force of sine wave form and the linear motor thrust of rectangular wave form allows the displacement curve of the shuttle to have sharp peaks.

Description

【発明の詳細な説明】 [技術分野] 本発明はハンマ駆動されるワイヤを横方向に一定ドット
間隔で設け、1行分の印字を複数のワイヤヘッドで行う
方式のラインプリンタのキャリッジ機構に関するもので
ある。
[Detailed Description of the Invention] [Technical Field] The present invention relates to a carriage mechanism of a line printer in which hammer-driven wires are provided at regular dot intervals in the horizontal direction and one line of printing is performed using a plurality of wire heads. It is.

[背景技術] この種のラインプリンタは、例えば印字用ワイヤを1行
の全文字数だけ設け、印字ブロックを搭載したシャトル
を1文字の横ドツト数だけ横方向にスライドさせて、複
数のワイヤヘッドで1行分を印字しながら、印字用紙を
縦方向に1ドツトずつ間欠送りしていくものである。シ
ャトルを横方向に往復運動させるために、従来はモータ
の回転をカムやリンク等を用いて直線運動に変換してい
たのであるが、近年プリンタの高速化、小形化に伴い、
伝達機構の要らないリニアモータ(ボイスコイルモータ
)を用いてシャトルを直接駆動する方式が開発されてい
る。これはシャトルの両端にリニアモータを設けておき
、端部まで移動してきたシャトルをリニアモータによっ
て逆方向に駆動するものであるが、慣性を持ったシャト
ルを減速停止させて−さらに逆方向に加速するには、非
常に大きなエネルギを必要とし、従って印字を高速化し
ようとするとりニアモータの消費電力が急増するために
、リニアモータの小形化が困難であるという問題があっ
た。
[Background Art] This type of line printer is configured, for example, by providing printing wires for the total number of characters in one line, sliding a shuttle carrying a printing block in the horizontal direction by the number of horizontal dots for one character, and using multiple wire heads. While printing one line, the printing paper is intermittently fed one dot at a time in the vertical direction. In order to reciprocate the shuttle in the horizontal direction, motor rotation was conventionally converted into linear motion using cams, links, etc., but in recent years, as printers have become faster and smaller,
A system has been developed in which the shuttle is directly driven using a linear motor (voice coil motor) that does not require a transmission mechanism. This involves installing linear motors at both ends of the shuttle, and driving the shuttle in the opposite direction once it has reached the end.The shuttle, which has inertia, is then decelerated to a stop and then accelerated in the opposite direction. This requires a very large amount of energy, and therefore, when attempting to speed up printing, the power consumption of the linear motor increases rapidly, making it difficult to downsize the linear motor.

このリニアモータの消費電力を軽減し加速度を向上する
ために、電磁石を利用する方法が特開昭59−8367
1号あるいは特開昭59−101380号で提案されて
いる。これはシャトルがストロークエンドに達した時に
電磁石に通電して、シャトルをリターン方向に吸引する
ようにしたものである。この方法によれば、リニアモー
タの消費電力は減少するものの、電磁石に電流を流す必
要があるので全体の消費電力は減少せず、むしろ電磁石
の可動鉄片はコイル外にあるので、リニアモータに比し
励磁電流に対して発生する力が減少するという欠点があ
る。
In order to reduce power consumption and improve acceleration of this linear motor, a method using electromagnets was proposed in Japanese Patent Application Laid-Open No. 59-8367.
No. 1 or Japanese Unexamined Patent Publication No. 101380/1983. When the shuttle reaches the end of its stroke, an electromagnet is energized to attract the shuttle in the return direction. Although this method reduces the power consumption of the linear motor, it does not reduce the overall power consumption because it is necessary to pass current through the electromagnet.In fact, the movable iron piece of the electromagnet is located outside the coil, so it is compared to a linear motor. However, it has the disadvantage that the force generated with respect to the excitation current is reduced.

[発明の目的] 本発明は上記の問題点に鑑み為されたものであり、その
目的とするところは、電磁石を用いずにリニアモータの
消費電力を軽減して、シャトルのストロークエンドにお
ける反転力を向上することのできるラインプリンタのキ
ャリッジ機構を提供するにある。
[Object of the Invention] The present invention has been made in view of the above problems, and its purpose is to reduce the power consumption of a linear motor without using an electromagnet, and to reduce the reversing force at the end of the stroke of the shuttle. The purpose of the present invention is to provide a carriage mechanism for a line printer that can improve the performance.

[発明の開示コ しかして本発明ラインプリンタのキャリッジ機構は、印
字ブロックを搭載したシャトルをリニアモータで揺動駆
動すると共に、シャトルのストロークの少なくとも両端
部分においてシャトルをストロークの中央に向けて付勢
するばねを設けたものであり、リニアモータによるシャ
トルの減速、停止、逆向き加速の動作をばねで補助する
ようにした点に特徴を有するものである。
[Disclosure of the Invention] The carriage mechanism of the line printer of the present invention uses a linear motor to swing the shuttle carrying the printing block, and also urges the shuttle toward the center of the stroke at least at both ends of the stroke. This system is characterized by the fact that the spring assists the linear motor in decelerating, stopping, and accelerating the shuttle in the opposite direction.

[実施例] 第1図は本発明の一実施例を示したもので、複数のハン
マヘプトlよりなる印字ブロックが、固定軸2にスライ
ド自在に挿着されたシャトル3に搭載されている。シャ
トル3は印字ブロック基台3aと、基台3aの両端部に
設けられ固定軸2上を往復運動するスライダ3bと、基
台3aの両端部から平行に突設された2本のアーム3c
と、両アーム3cによって支持されたりニアモータ4の
可動軸3dとで構成されており、リニアモータ4に交番
パルス電流を供給することにより、シャトル3が固定軸
2上で往復駆動されるようになっている。リニアモータ
4の両側で可動軸3dを支承している軸受5と各アーム
3cとの間にそれぞれコイルばね6が介装されており、
印字ブロックを含むシャトル全体の質量とコイルばね6
のばね定数とによる固有振動数にリニアモータ4を励振
するパルス周波数を同期させている。
[Embodiment] FIG. 1 shows an embodiment of the present invention, in which a printing block consisting of a plurality of hammer hepts 1 is mounted on a shuttle 3 that is slidably inserted into a fixed shaft 2. As shown in FIG. The shuttle 3 includes a printing block base 3a, a slider 3b provided at both ends of the base 3a and reciprocating on the fixed shaft 2, and two arms 3c protruding in parallel from both ends of the base 3a.
The shuttle 3 is supported by both arms 3c and a movable shaft 3d of a near motor 4. By supplying an alternating pulse current to the linear motor 4, the shuttle 3 is reciprocated on the fixed shaft 2. ing. A coil spring 6 is interposed between each arm 3c and a bearing 5 supporting the movable shaft 3d on both sides of the linear motor 4.
Mass of entire shuttle including printing block and coil spring 6
The pulse frequency that excites the linear motor 4 is synchronized with the natural frequency determined by the spring constant.

第2図は上記構成による動作を示したもので、正弦波状
のばね力とりニアモータの矩形波状の推力との合力によ
って、ピークの急峻なシャトルの変位曲線が得られるの
である。
FIG. 2 shows the operation of the above configuration, and a shuttle displacement curve with a steep peak is obtained by the resultant force of the sinusoidal spring force and the rectangular wave thrust of the near motor.

第8図は本発明キャリッジ機構の動作原理を説明するた
めのもので、同図に示すように1ばねがない場合のりニ
アモータの励磁電流とシャトルの変位との関係を、第9
図(aXb)に実線で示した。
FIG. 8 is for explaining the operating principle of the carriage mechanism of the present invention. As shown in the figure, the relationship between the excitation current of the linear motor and the displacement of the shuttle in the absence of one spring is shown in FIG.
It is shown by a solid line in the figure (aXb).

同図において、シャトル3のストロークD、のうち印字
部分り、では、シャトル3のスライド速度がハンマの応
答周波数できまるので、高速化のためにはストロークの
両端部分D3における減速及び加速を大きくして、破線
に示すように立ち上がりを速くしなければならない。そ
のため第8図の構成では、第9図(aXb)に破線で示
したように、リニアモータ4に大電流を流す必要がある
ので、リニアモータ4が大形化してしまうという問題が
ある。第1図の構成によれば、コイルばね6とリニアモ
ータ4との組み合わせによって、ストロークの両端部分
D3における反転カーブを急峻にし、リニアモータを大
形化することなく、シャトルの往復運動の周期を短縮し
得るものである。
In the figure, in the printing portion of the stroke D of the shuttle 3, the slide speed of the shuttle 3 is determined by the response frequency of the hammer, so in order to increase the speed, the deceleration and acceleration at both end portions D3 of the stroke must be increased. Therefore, the start-up must be made faster as shown by the broken line. Therefore, in the configuration of FIG. 8, as shown by the broken line in FIG. 9 (aXb), it is necessary to flow a large current through the linear motor 4, so there is a problem that the linear motor 4 becomes large in size. According to the configuration shown in FIG. 1, the combination of the coil spring 6 and the linear motor 4 makes the reversal curve at both end portions D3 of the stroke steep, and the period of the reciprocating motion of the shuttle can be reduced without increasing the size of the linear motor. This can be shortened.

第3図及び第4図の実施例は、コイルばね6の代わりに
板ばね7を使用したもので、板ばね7は第3図のように
シャトル3の両端部に設けてもよく、また第4図のよう
にシャトル3の中央に設けてもよい。
The embodiments shown in FIGS. 3 and 4 use a leaf spring 7 instead of the coil spring 6. The leaf spring 7 may be provided at both ends of the shuttle 3 as shown in FIG. It may be provided at the center of the shuttle 3 as shown in FIG.

第5図及び第7図の実施例は、ストロークの両端部分で
のみシャトルにばねが作用するようにしたもので、第5
図は第1図における両コイルばね6の長さを短くして、
シャトル3が端部に移動してきた時にのみコイルばね6
が作用するようにしたものであり、また第7図はシャト
ル3の両端面に間隔を隔てて板ばね7を対設して、やは
りストロークエンドでシャトル3と板ばね7とが係合す
るようにしたものである。第6図は上記構成による動作
を示したもので、(a)図はン・ヤトル3の変位とばね
力との関係を、(b)はシャトル3の変位の時間的な変
化をそれぞれ示したものであり、Tの部分のみでシャト
ル3にばね力が作用するのである。
In the embodiments shown in FIGS. 5 and 7, the spring acts on the shuttle only at both ends of the stroke.
The figure shows the length of both coil springs 6 in FIG. 1 being shortened,
Coil spring 6 only when shuttle 3 moves to the end
In addition, as shown in FIG. 7, leaf springs 7 are provided on both end faces of the shuttle 3 at a distance, so that the shuttle 3 and the leaf springs 7 are engaged at the end of the stroke. This is what I did. Figure 6 shows the operation of the above configuration, where (a) shows the relationship between the displacement of the shuttle 3 and the spring force, and (b) shows the temporal change in the displacement of the shuttle 3. The spring force acts on the shuttle 3 only at the T portion.

[発明の効果コ 本発明によれば上述のように、リニアモータでシャトル
を揺動駆動する方式のラインプリンタにおいて、リニア
モータによるシャトルの反転力をばねにより補助するよ
うにしたものであるから、リニアモータを大形化するこ
となくシャトルのストロークエンドにおける減速及び逆
向き加速の立ち上がりを速< 1.、印字速度の高速化
を図ることができるという利点がある。
[Effects of the Invention] According to the present invention, as described above, in a line printer in which the shuttle is oscillatedly driven by a linear motor, the reversing force of the shuttle by the linear motor is assisted by a spring. The deceleration at the end of the stroke of the shuttle and the rise of reverse acceleration can be made faster than 1. without increasing the size of the linear motor. , there is an advantage that printing speed can be increased.

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

第1図(a)は本発明の一実施例を示す斜視図、同図(
b)は同上の動作を示す側面略図、第2図は同上の動作
説明図、第3図(a)は他の実施例の斜視図、同図(b
)は同上の動作を示す要部側面略図、第4図はさらに他
の実施例を示す側面略図、第5(久少 図はさらに他の実施例を示す斜視図、同図(b)はへ 同一にの動作を示す側面略図、第6図は同上の動作説明
図、第7図(a)はさらに他の実施例を示す斜視図、同
図(b)は同上の動作を示す側面略図、同図(c)は同
上の要部を側面略図、第8図は本発明の動作原理を示す
斜視図、第9図は同上の動作説明図である。 ■はハンマヘッド、2は固定軸、3はシャトル、4はリ
ニアモータ、5は軸受、6はコイルばね、7は板ばね。 代理人 弁理士 石 1)長 七 第1図 (b) 第2図 第3図 (b) (b) 第6図 第7図 第8図 第9図
FIG. 1(a) is a perspective view showing one embodiment of the present invention;
b) is a schematic side view showing the same operation as above, FIG. 2 is an explanatory view of the same operation, FIG. 3(a) is a perspective view of another embodiment,
) is a schematic side view of the main part showing the operation of the above, FIG. 4 is a schematic side view showing another embodiment, and FIG. 6 is an explanatory diagram of the same operation as above, FIG. 7(a) is a perspective view showing still another embodiment, FIG. 7(b) is a schematic side view showing the same operation, Figure 8(c) is a schematic side view of the main parts of the above, Figure 8 is a perspective view showing the principle of operation of the present invention, and Figure 9 is an explanatory diagram of the operation of the same. 3 is a shuttle, 4 is a linear motor, 5 is a bearing, 6 is a coil spring, and 7 is a leaf spring. Agent Patent Attorney Ishi 1) Long 7 Figure 1 (b) Figure 2 Figure 3 (b) (b) Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

【特許請求の範囲】[Claims] (1)印字ブロックを搭載したシャトルをリニアモータ
で揺動駆動すると共に、シャトルのストロークの少なく
とも両端部分においてシャトルをストロークの中央に向
けて付勢するばねを設けて成るラインプリンタのキャリ
ッジ機構。
(1) A carriage mechanism for a line printer, in which a shuttle carrying a printing block is oscillated by a linear motor, and is provided with springs that bias the shuttle toward the center of the stroke at least at both ends of the stroke.
JP21130885A 1985-09-25 1985-09-25 Carriage mechanism in line printer Pending JPS6270057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21130885A JPS6270057A (en) 1985-09-25 1985-09-25 Carriage mechanism in line printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21130885A JPS6270057A (en) 1985-09-25 1985-09-25 Carriage mechanism in line printer

Publications (1)

Publication Number Publication Date
JPS6270057A true JPS6270057A (en) 1987-03-31

Family

ID=16603788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21130885A Pending JPS6270057A (en) 1985-09-25 1985-09-25 Carriage mechanism in line printer

Country Status (1)

Country Link
JP (1) JPS6270057A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007144694A (en) * 2005-11-25 2007-06-14 Ricoh Printing Systems Ltd Shuttle controlling method for dot line printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007144694A (en) * 2005-11-25 2007-06-14 Ricoh Printing Systems Ltd Shuttle controlling method for dot line printer

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