JPS625070B2 - - Google Patents
Info
- Publication number
- JPS625070B2 JPS625070B2 JP56110739A JP11073981A JPS625070B2 JP S625070 B2 JPS625070 B2 JP S625070B2 JP 56110739 A JP56110739 A JP 56110739A JP 11073981 A JP11073981 A JP 11073981A JP S625070 B2 JPS625070 B2 JP S625070B2
- Authority
- JP
- Japan
- Prior art keywords
- dot
- wire
- armature
- printing
- weight
- 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
Links
- 238000005452 bending Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 239000011195 cermet Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/27—Actuators for print wires
- B41J2/28—Actuators for print wires of spring charge type, i.e. with mechanical power under electro-magnetic control
Landscapes
- Impact Printers (AREA)
Description
本発明は、ドツトワイヤを選択的に突出させる
ことによつてドツト文字あるいはイメージを印字
するワイヤドツトヘツドに関する。
近年、ワイヤドツトヘツドは、ドツトを印字す
るドツト印字素子として、ピアノ線或はタングス
テン線、ステンレス線等のドツトワイヤから超硬
合金のドツトワイヤへと移行して来た。超硬合金
のドツトワイヤを用いることによつて、ドツト印
字素子の生命であるワイヤ先端が摩耗しない為
に、ドツトヘツドの寿命が大幅に延びた。
しかしながら、ドツトワイヤとして一般的に用
いている超硬金ワイヤは、比重が約14と重い欠点
があつた。
一般に、印字エネルギーＥが一定であるとき、
到達時間ｔは質量の平方根（√）に比例する。
以下、第１図及び第２図を用いて説明する。
第１図は、錘り１をばね２によつて、つり下げ
た状態を示す図、第２図はその変位を示す図であ
る。
今、ばね定数ｋのばね２に質量ｍの錘り１をつ
り下げ、初期変位x0を与えておいて、解放してや
ると、変位量ｘは次の式で求められることが知ら
れている。（ただし、ｔは時間とする。）
また、速度ｖは変位ｘを微分したものであるか
ら、
となり、印字エネルギーをＥとすれば、次の式が
成り立つ。
となる。したがつて、
The present invention relates to a wire dot head for printing dot characters or images by selectively protruding dot wires. In recent years, wire dot heads have shifted from dot wires such as piano wire, tungsten wire, and stainless wire to dot wires made of cemented carbide as dot printing elements for printing dots. By using a dot wire made of cemented carbide, the life of the dot head has been greatly extended because the tip of the wire, which is the lifeblood of the dot printing element, does not wear out. However, the cemented carbide gold wire commonly used as the dot wire has a drawback of being heavy with a specific gravity of about 14. Generally, when the printing energy E is constant,
The arrival time t is proportional to the square root (√) of the mass. This will be explained below using FIGS. 1 and 2. FIG. 1 is a diagram showing a state in which a weight 1 is suspended by a spring 2, and FIG. 2 is a diagram showing its displacement. It is known that if a weight 1 with a mass m is suspended from a spring 2 with a spring constant k, an initial displacement x 0 is given, and the weight 1 is released, the amount of displacement x can be determined by the following equation. (However, t is time.) Also, since the velocity v is the differential of the displacement x, If the printing energy is E, then the following formula holds true. becomes. Therefore,
【式】となるから、印字エネルギーが一
定であれば、質量ｍが小さい程時間ｔが小さくな
る。
そこで、本発明は、超硬合金から成るドツトワ
イヤの長所をそこなうことなく、しかもより高速
駆動可能なワイヤドツトヘツドを提供しようと言
うものである。
第３図は、本発明に係るワイヤドツトヘツドの
一部を示す側断面図である。第３図において、１
は円板状のヨーク、２はこのヨーク１の上に重ね
られた環状の永久磁石、３はこの永久磁石３の上
に重ねられた磁性体のスペーサ、４は上蓋で、磁
性体である必要はない。５は一端を前記スペーサ
３とスペーサ４によつて挾持された板ばね、６は
一端を前記板ばね５によつて支持されたアーマチ
ユア、７は前記ヨーク１の上に円形に複数個配置
されたコア、８は該コアに巻回されたコイル、１
０は前記アーマチユア６のテーパ状の他端６ａに
ロウ付け等の方法で固定されたサーメツト（例え
ばTiC＋TiN）からなるドツトワイヤ、１１は前
記アーマチユア６が突出したときそれ以上突出し
ないためのダンパーで前記上蓋４の内側に環状に
設けられている。１２はインクリボン、１３はプ
ラテン、１４は該インクリボン１２とプラテン１
３との間に設けられた印字媒体である。
次に、上記ワイヤドツトヘツドの動作を説明す
ると、アーマチユア６は初期状態では永久磁石２
の磁力によつて、コア７に吸引されている。した
がつて、この状態では、板ばね５は偏寄されて反
発力がチヤージされている。次に、コイル６が選
択的に励磁されると、前記永久磁石２の磁束が打
ち消され、板ばね５の復元力によつてアーマチユ
ア６が突出し、したがつてドツトワイヤ１０も突
出して、インクリボン１２を介して印字媒体１４
に衝突し、ドツト印字を行う。
このとき、アーマチユア６は板ばね５の一端付
近を回転中心として、円弧をえがくように移動す
るため、アーマチユア６の他端６ａの端面とドツ
トワイヤ１０の先端とのなす角が変化する。
すなわち、ドツトワイヤ１０はプラテン１３に
衝突するときには直線状態で衝突することが望ま
しいから、アーマチユア６が最も反時計方向に回
動した点では、ドツトワイヤ１０は一点鎖線で示
すように直線状になつているが、アーマチユア６
がコア７に吸引されているときには、ドツトワイ
ヤ１０は時計方向の力を受ける。しかしながら、
ドツトワイヤ１０の先端は上蓋４の先端のガイド
部４ａによつてドツトワイヤ１０の長手方向にの
み摺動可能にガイドされているから時計方向に移
動することはできず、実線で示すように反る。
したがつて、アーマチユア６の他端６ａとドツ
トワイヤ１０との固着部分、すなわち、ドツトワ
イヤ１０の付け根部分には該ドツトワイヤ１０の
長手方向と直角方向の力が加わる。[Formula] Therefore, if the printing energy is constant, the time t becomes shorter as the mass m becomes smaller. Therefore, the present invention aims to provide a wire dot head that can be driven at higher speeds without sacrificing the advantages of dot wires made of cemented carbide. FIG. 3 is a side sectional view of a portion of a wire dot head according to the present invention. In Figure 3, 1
is a disk-shaped yoke, 2 is an annular permanent magnet superimposed on this yoke 1, 3 is a magnetic spacer superimposed on this permanent magnet 3, and 4 is an upper cover, which must be made of a magnetic material. There isn't. 5 is a leaf spring whose one end is held between the spacers 3 and 4; 6 is an armature whose one end is supported by the leaf spring 5; and 7 is a plurality of leaf springs arranged in a circular manner on the yoke 1. A core, 8, a coil wound around the core, 1
0 is a dot wire made of cermet (for example, TiC+TiN) fixed to the tapered other end 6a of the armature 6 by a method such as brazing, and 11 is a damper for preventing the armature 6 from protruding further when it protrudes from the upper cover. It is provided in an annular shape inside 4. 12 is an ink ribbon, 13 is a platen, and 14 is the ink ribbon 12 and platen 1.
3. This is a print medium provided between 3 and 3. Next, to explain the operation of the wire dot head, the armature 6 is initially connected to the permanent magnet 2.
is attracted to the core 7 by the magnetic force of. Therefore, in this state, the leaf spring 5 is biased and the repulsive force is charged. Next, when the coil 6 is selectively excited, the magnetic flux of the permanent magnet 2 is canceled out, and the armature 6 protrudes due to the restoring force of the leaf spring 5. Therefore, the dot wire 10 also protrudes, and the ink ribbon 12 Print media 14 via
collides with the object and prints dots. At this time, the armature 6 moves in an arc around one end of the leaf spring 5 as the center of rotation, so the angle between the end surface of the other end 6a of the armature 6 and the tip of the dot wire 10 changes. That is, since it is desirable that the dot wire 10 collides with the platen 13 in a straight line, at the point where the armature 6 has rotated most counterclockwise, the dot wire 10 is in a straight line as shown by the dashed line. However, armature 6
When the dot wire 10 is attracted to the core 7, the dot wire 10 receives a clockwise force. however,
Since the tip of the dot wire 10 is slidably guided only in the longitudinal direction of the dot wire 10 by the guide portion 4a at the tip of the upper cover 4, it cannot move clockwise and is warped as shown by the solid line. Therefore, a force in a direction perpendicular to the longitudinal direction of the dot wire 10 is applied to the portion where the other end 6a of the armature 6 and the dot wire 10 are fixed, that is, the root portion of the dot wire 10.
【表】
ところで、第１表はサーメツトと超硬合金との
比較値を示すもので、ドツトワイヤに必要な性質
は曲げ強度、低密度、耐熱性、耐摩耗性、であ
り、サーメツトが共にまさつていることがわか
る。
すなわち、耐摩耗性はビツカース硬度が大きい
程良く約27％勝つているためワイヤ先端の寿命が
延びる。また、ヤング率が約15％小さいため、座
屈に影響しない範囲ではドツトワイヤの付け根部
分に掛る応力振幅を小さく出来るため、ドツトワ
イヤが付け根で折れることがなくなる。
さらに、密度が半分以下であるため、軽量のア
ーマチユア系を構成出来る。[Table] By the way, Table 1 shows the comparative values of cermet and cemented carbide.The properties required for dot wire are bending strength, low density, heat resistance, and abrasion resistance, and cermet is superior to all of them. I know that there is. In other words, the higher the Vickers hardness, the better the wear resistance is by about 27%, which extends the life of the wire tip. Furthermore, since the Young's modulus is approximately 15% smaller, the stress amplitude applied to the root of the dot wire can be reduced within a range that does not affect buckling, so the dot wire will not break at the root. Furthermore, since the density is less than half, a lightweight armature system can be constructed.
【表】
第２表は、サーメツトワイヤを装備した場合と
超硬合金のワイヤを装備した場合のアーマチユア
系の重量と印字に要する時間との実験結果を示す
表で、ドツトワイヤがアーマチユアの先端に付い
ている構成上、このドツトワイヤの重量が大きく
作用し、約58％軽くなると、第２表からも明らか
なように、印字に要する時間は、８〜９％少なく
てすむ。
このことは、印字速度を８〜９％アツプ出来
る。なお、実施例では、いわゆるばねチヤージ形
のワイヤドツトプリンタのみについて説明した
が、クラツパ形のワイヤドツトプリンタであれ
ば、同一の効果が得られる。
さらに、プランジヤ形のワイヤドツトプリンタ
でもワイヤの重量そのままの作用効果であるけれ
ども、ドツトワイヤが軽くなつた分だけ、印字ス
ピートが上がるとは言うまでもない。
以上、詳細に説明したように、本発明は、ワイ
ヤドツトヘツドの、ドツトワイヤとしてサーメツ
トを用いたことにより、アーマチユア系の移動部
分の質量、ヤング率、ビツカース硬度を改善する
ことが出来、それによつて、ドツトワイヤ先端の
寿命を延ばすことが出来、ドツトワイヤが付け根
で折れたり、ロウ付が破損したりすることが少な
くなり、さらに印字速度を上げることが出来る効
果がある。[Table] Table 2 shows the experimental results of the weight of the armature system and the time required for printing when equipped with cermet wire and when equipped with cemented carbide wire. Due to the structure, the weight of this dot wire plays a large role, and if it is about 58% lighter, the time required for printing can be reduced by 8 to 9%, as is clear from Table 2. This can increase printing speed by 8 to 9%. In the embodiment, only a so-called spring charge type wire dot printer has been described, but the same effect can be obtained with a clapper type wire dot printer. Furthermore, although the effect of plunger-type wire dot printers is the same as the weight of the wire, it goes without saying that the printing speed increases as the dot wire becomes lighter. As described above in detail, the present invention uses cermet as the dot wire of the wire dot head, thereby improving the mass, Young's modulus, and Vickers hardness of the moving parts of the armature system. This has the effect that the life of the tip of the dot wire can be extended, the dot wire is less likely to break at the base or the braze is damaged, and printing speed can be increased.
第１図は錘りをばねでつるした状態を示す図、
第２図はその変位関係を示す図、第３図は本発明
に係るワイヤドツトヘツドの一部を示す側断面図
である。
１……ヨーク、２……永久磁石、４……上蓋、
５……板ばね、６……アーマチユア、７……コ
ア、８……コイル、９……ドツトワイヤ、１１…
…ダンパー、１２……インクリボン、１３……プ
ラテン、１４……印字媒体。
Figure 1 shows a state in which the weight is suspended by a spring.
FIG. 2 is a diagram showing the displacement relationship, and FIG. 3 is a side sectional view showing a part of the wire dot head according to the present invention. 1...Yoke, 2...Permanent magnet, 4...Top lid,
5... Leaf spring, 6... Armature, 7... Core, 8... Coil, 9... Dot wire, 11...
...Damper, 12... Ink ribbon, 13... Platen, 14... Print medium.
Claims (1)
字を行うワイヤドツトヘツドにおいて、ドツトワ
イヤをTiCとTiNが主成分で曲げ強度150Kg／
mm2、比重６、ヤング率4.6Kg／mm2のサーメツトで
構成したことを特徴とするワイヤドツトヘツド。1 In a wire dot head that prints dots by selectively protruding dot wires, the dot wires are mainly composed of TiC and TiN and have a bending strength of 150 kg/
mm 2 , specific gravity 6, and Young's modulus 4.6 Kg/mm 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11073981A JPS5812773A (en) | 1981-07-17 | 1981-07-17 | Wire dot head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11073981A JPS5812773A (en) | 1981-07-17 | 1981-07-17 | Wire dot head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5812773A JPS5812773A (en) | 1983-01-24 |
| JPS625070B2 true JPS625070B2 (en) | 1987-02-03 |
Family
ID=14543291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11073981A Granted JPS5812773A (en) | 1981-07-17 | 1981-07-17 | Wire dot head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5812773A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058332U (en) * | 1983-09-29 | 1985-04-23 | 三菱マテリアル株式会社 | dot printer printing wire |
| US4634302A (en) * | 1985-08-26 | 1987-01-06 | Dataproducts, Inc. | Actuator for dot matrix printhead |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52136711U (en) * | 1976-04-09 | 1977-10-17 |
-
1981
- 1981-07-17 JP JP11073981A patent/JPS5812773A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5812773A (en) | 1983-01-24 |
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