JPH0380111B2 - - Google Patents
Info
- Publication number
- JPH0380111B2 JPH0380111B2 JP56160421A JP16042181A JPH0380111B2 JP H0380111 B2 JPH0380111 B2 JP H0380111B2 JP 56160421 A JP56160421 A JP 56160421A JP 16042181 A JP16042181 A JP 16042181A JP H0380111 B2 JPH0380111 B2 JP H0380111B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- guide hole
- dot head
- diameter
- shape
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims 1
- 239000010979 ruby Substances 0.000 description 3
- 229910001750 ruby Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 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
- B41J2/235—Print head assemblies
- B41J2/265—Guides for print wires
Landscapes
- Impact Printers (AREA)
Description
【発明の詳細な説明】
本発明は、ワイヤガイド孔を改良したワイヤド
ツトヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire dot head with an improved wire guide hole.
従来、ワイヤドツトヘツドにおいて、印字ワイ
ヤと摺接してこれを規定の位置に保持するワイ
ヤ・ガードは、長時間使用により次第に摩耗して
ガイド孔の径が広がり、また印字ワイヤの線径も
やせ細り、印字の不鮮明、印字乱れ等が生じ、結
果的にワイヤドツトヘツドの寿命が短かくなると
いう欠点があつた。 Conventionally, in wire dot heads, the wire guard that slides into contact with the printing wire and holds it in a specified position gradually wears out over long periods of use, causing the diameter of the guide hole to widen and the diameter of the printing wire to become thinner. This method has the drawback of causing blurred prints, irregular prints, etc., and as a result, the life of the wire dot head is shortened.
第１図はワイヤガードを示し、ワイヤガード半
体１，２をワイヤガード保持体３，４で連結して
組立られ、中央に直径ｄのガイド孔５が複数形成
される。このガイド孔と印字ワイヤとの間に摩耗
が発生するのであるが、このような摩耗に対しド
ツトヘツドの寿命を長くするため、耐摩耗性の高
い材料の開発が行なわれ、印字ワイヤではステン
レス鋼線、タングステン線さらには、ハイス鋼線
が使用されている。またワイヤガードでは、耐摩
耗性の高いプラスチツク、ルビー等の材料が用い
られている。しかしながらいづれも耐摩耗性の面
から、まだ十分とは言えない。 FIG. 1 shows a wire guard, which is assembled by connecting wire guard halves 1 and 2 with wire guard holders 3 and 4, and has a plurality of guide holes 5 of diameter d formed in the center. Wear occurs between this guide hole and the printing wire, but in order to prolong the life of the dot head against such wear, materials with high wear resistance have been developed, and the printing wire is made of stainless steel wire. , tungsten wire, and even high speed steel wire are used. In addition, wire guards are made of highly wear-resistant materials such as plastic and ruby. However, none of these materials can be said to be sufficient in terms of wear resistance.
またワイヤガイドのガイド孔５はガイド孔５の
長さ方向における断面が第２図に示す如く長方形
であり、印字ワイヤの中心線とガイド孔の中心線
の間に非平行な状態が生じた場合、ガイド孔の出
入口で印字ワイヤとワイヤガードが激しく接触
し、ワイヤ・ガードには、接触部で急激な摩耗や
カケが発生し、また印字ワイヤは急激に摩耗し、
結果的にワイヤドツトヘツドの寿命を短かくす
る。 Further, the guide hole 5 of the wire guide has a rectangular cross section in the longitudinal direction as shown in FIG. 2, and if a non-parallel state occurs between the center line of the printing wire and the center line of the guide hole, , the printing wire and the wire guard come into contact with each other violently at the entrance and exit of the guide hole, and the wire guard is rapidly worn and chipped at the contact area, and the printing wire is also rapidly worn.
As a result, the life of the wire dot head is shortened.
本発明は、前述従来例の問題点を解消するもの
で、ワイヤを突出させて被記録材に記録を行うた
めのワイヤドツトヘツドにおいて、前記ワイヤを
ガイドするためのガイド孔を構成する側壁の間隔
を前記ワイヤの侵入側では前記ワイヤの径よりも
大きくして、前記ワイヤの出口側では前記ワイヤ
の径と略同等の大きさとするとともに、前記ワイ
ヤの突出方向を規定するように前記ガイド孔を構
成する側壁の形状を前記側壁間の間隔が徐々に狭
くなるように前記ワイヤの侵入側から出口側に至
る滑らかな曲面とするワイヤドツトヘツドを提供
することを目的とする。以下実施例の図面を基に
本発明の詳細な説明を行なう。 The present invention solves the above-mentioned problems of the conventional example, and provides a wire dot head for recording on a recording material by protruding a wire, the interval between side walls constituting a guide hole for guiding the wire. is made larger than the diameter of the wire on the entry side of the wire, and approximately equal to the diameter of the wire on the exit side of the wire, and the guide hole is formed so as to define the direction in which the wire protrudes. It is an object of the present invention to provide a wire dot head in which the shape of the side walls is a smooth curved surface extending from the wire entry side to the exit side so that the interval between the side walls gradually narrows. The present invention will be described in detail below based on drawings of embodiments.
第３図は、本発明による実施例を説明するもの
であつて、ワイヤガード半体１１，１２によつて
形成されるガイド孔１５の断面形状を、中央部が
大略ワイヤ径と同等にあつて、ガイド孔出入口で
ワイヤ径より大きく広がつた曲面形状とした。こ
の曲面は第３図に示す如くガイド孔の長さ方向に
おいて円弧が中央に向けて突出する形状であり、
鼓型である。 FIG. 3 illustrates an embodiment according to the present invention, in which the cross-sectional shape of the guide hole 15 formed by the wire guard halves 11 and 12 is such that the central part is approximately equal to the wire diameter. The guide hole has a curved shape that is wider than the wire diameter at the entrance and exit. This curved surface has a shape in which an arc protrudes toward the center in the length direction of the guide hole, as shown in FIG.
It is drum-shaped.
本実施例において、ガイド孔に設ける曲面形状
の半径Ｒをガイド孔の長しｔに対して２〜25倍と
しているが、R25以上では、ガイド孔形状が直線
状と大きな差が生じないため耐摩耗の効果が期待
できない。またR2以下では、ガイド孔中心軸と
印字ワイヤの非平行が生じた場合、ワイヤ・ガー
ドと印字ワイヤの間に急激な接触（カジリつき）
は起こらないものの、ワイヤ・ガードと印字ワイ
ヤの接触が狭い範囲で起こるため、互いに摩耗し
やすくなり耐摩耗性を高めることは出来ない。 In this example, the radius R of the curved surface provided in the guide hole is set to 2 to 25 times the length t of the guide hole, but if the radius is R25 or more, the shape of the guide hole will not be much different from a straight one, so No effect on wear can be expected. In addition, with R2 or less, if the center axis of the guide hole and the printing wire are not parallel, sudden contact may occur between the wire guard and the printing wire (galling).
Although this does not occur, the contact between the wire guard and the printing wire occurs in a narrow range, so they tend to wear each other easily, making it impossible to improve the wear resistance.
また本実施例においては、ワイヤガードとして
エポキシ樹脂にグラフアイトを０〜60重量％加え
たものを用いるが、０％でもエポキシ樹脂では、
ワイヤとの摺動において、ワイヤ・ガードが減り
やすくはなるものの、ワイヤを摩耗させないた
め、ワイヤドツトプリンターの寿命を短かくはし
ていない。グラフアイトの量が増すに従いワイヤ
ガードの潤滑性が増大し、ワイヤ・ガードの摩耗
も、ワイヤの摩耗も極度に軽減するが、グラフア
イトの充填量が60重量％以上では、ワイヤ・ガー
ドの強度が低下し、耐摩耗性が低下する。 Furthermore, in this example, an epoxy resin containing 0 to 60% by weight of graphite is used as a wire guard, but even if the epoxy resin is 0%,
Although the wire guard tends to wear down as it slides against the wire, it does not shorten the life of the wire dot printer because the wire does not wear out. As the amount of graphite increases, the lubricity of the wire guard increases, and the wear of the wire guard and the wear of the wire are extremely reduced.However, when the amount of graphite filled is 60% by weight or more, the strength of the wire guard increases. decreases, and wear resistance decreases.
また本件出願人は次の様な実験も行なつた。 The applicant also conducted the following experiments.
従来例のガイド孔形状のワイヤ・ガードとして
ルビー及びエポキシ樹脂にグラフアイト微粉
末を30％加えたもの、本発明による実施例として
ルビーにR10の曲面形状のガイド孔を設けたも
の、さらにはエポキシ樹脂にグラフアイト微粉
末を30％加えたものにR15の曲面状のガイド孔を
設けたものの４種についてドツトプリンターで実
動印字試験を行なつたところ、は1000万字で印
字の乱れが、は500万字で印字の乱れが発生し
たが、、では、2000万字の印字でも印字の欠
陥は見い出せなかつた。 A wire guard with a conventional guide hole shape is made by adding 30% graphite fine powder to ruby and epoxy resin, and an example according to the present invention is a guide hole in a ruby with an R10 curved shape. When we conducted an actual printing test using a dot printer on four types of resin with 30% graphite fine powder added and R15 curved guide holes, we found that there were no irregularities in printing after 10 million characters. Disturbances in printing occurred after 5 million characters, but with , no printing defects were found even after 20 million characters were printed.
第４図は他の実施例であつて、ガード半体１１
−１，１２−１によつて形成されるガイド孔１
５′はラツパ形状であり、この様に本発明におい
ては、ガイド孔に施す曲面形状において、ガイド
孔と印字ワイヤの最も接近する点はガイド孔の中
にあれば良い。またワイヤ・ガード半体をワイヤ
ガード保持体と一体に形成しても良い。 FIG. 4 shows another embodiment of the guard half body 11.
Guide hole 1 formed by -1, 12-1
5' is a truss shape, and as described above, in the present invention, in the curved shape of the guide hole, the point where the guide hole and the printing wire come closest should be within the guide hole. Further, the wire guard half may be formed integrally with the wire guard holder.
以上説明したように本願発明によれば、記録
時、即ちワイヤ突出時にワイヤの突出方向をより
精度高くすることができるにも関わらず、ワイヤ
ガイド孔を構成する側壁と接触する面積を最小限
にすることができる。更に、ガイド孔を構成する
側壁とワイヤとの摩耗を少なくすることができる
とともに、摺擦音を極めて少なくし、ヘツドの寿
命を従来品に比較して著しく向上させることがで
きる。また更に、ワイヤはガイド孔の出口側へス
ムースに案内されて位置を規定されるので、印字
時の衝撃によつて生じるワイヤの曲がりに関係な
く、記録位置精度を高めることができる。 As explained above, according to the present invention, although it is possible to increase the accuracy of the wire protrusion direction during recording, that is, when the wire is protruded, the area in contact with the side wall constituting the wire guide hole can be minimized. can do. Furthermore, it is possible to reduce wear between the wire and the side wall constituting the guide hole, and also to extremely reduce frictional noise, thereby significantly extending the life of the head compared to conventional products. Furthermore, since the wire is smoothly guided to the exit side of the guide hole and its position is defined, recording position accuracy can be improved regardless of bending of the wire caused by impact during printing.
第１図は、ワイヤ・ガードの形状を示す説明
図、第２図は、第１図のａ−a′断面であつて、従
来のワイヤガイドのガイド孔の断面図、第３図
は、第１図のａ−a′断面であつて、本発明の実施
例によるワイヤ・ガードのガイド孔の断面図、第
４図は、他の実施例の断面図。
２，３……ワイヤガード保持体、１１，１２，
１１−１，１２−１……ワイヤ・ガード半体、１
５，１５′……ガイド孔。
FIG. 1 is an explanatory diagram showing the shape of the wire guard, FIG. 2 is a sectional view taken along line a-a' in FIG. 1, and is a sectional view of the guide hole of a conventional wire guide. 1 is a sectional view taken along the line aa' in FIG. 1, showing a guide hole of a wire guard according to an embodiment of the present invention, and FIG. 4 is a sectional view of another embodiment. 2, 3... wire guard holder, 11, 12,
11-1, 12-1... Wire guard half, 1
5, 15'...Guide hole.
Claims (1)
めのワイヤドツトヘツドにおいて、 前記ワイヤをガイドするためのガイド孔を構成
する側壁の間隔を前記ワイヤの侵入側では前記ワ
イヤの径よりも大きくして、前記ワイヤの出口側
では前記ワイヤの径と略同等の大きさとするとと
もに、前記ワイヤの突出方向を規定するように前
記ガイド孔を構成する側壁の形状を前記側壁間の
間隔が徐々に狭くなるように前記ワイヤの侵入側
から出口側に至る滑らかな曲面とすることを特徴
とするワイヤドツトヘツド。 ２ 前記ガイド孔の長さ方向における断面を該ガ
イド孔の長さに対し２〜25倍の半径の円弧が中心
方向に突出した形状としたことを特徴とする特許
請求の範囲第１項記載のワイヤドツトヘツド。 ３ 前記ワイヤドツトヘツドの一部を、エポキシ
樹脂に充填剤としてグラフアイトを０〜60重量％
加えた材料で形成したことを特徴とする特許請求
の範囲第１項または第２項記載のワイヤドツトヘ
ツド。[Scope of Claims] 1. In a wire dot head for recording on a recording material by protruding a wire, an interval between side walls constituting a guide hole for guiding the wire is set such that on the entry side of the wire, The diameter of the guide hole is set to be larger than the diameter of the guide hole, and the diameter of the guide hole is set to be approximately equal to the diameter of the wire on the exit side of the wire, and the shape of the side wall constituting the guide hole is set so that the shape of the side wall between the side walls is set so as to define the direction in which the wire protrudes. A wire dot head characterized in that the wire dot head has a smooth curved surface extending from the entrance side to the exit side of the wire so that the interval between the wires gradually narrows. 2. The guide hole according to claim 1, wherein the cross section in the length direction of the guide hole has a shape in which an arc having a radius of 2 to 25 times the length of the guide hole projects toward the center. wire dot head. 3 A part of the wire dot head is made of epoxy resin containing 0 to 60% by weight of graphite as a filler.
3. A wire dot head as claimed in claim 1 or claim 2, characterized in that it is formed of an additional material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16042181A JPS5862067A (en) | 1981-10-08 | 1981-10-08 | Wire dot head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16042181A JPS5862067A (en) | 1981-10-08 | 1981-10-08 | Wire dot head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5862067A JPS5862067A (en) | 1983-04-13 |
| JPH0380111B2 true JPH0380111B2 (en) | 1991-12-20 |
Family
ID=15714556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16042181A Granted JPS5862067A (en) | 1981-10-08 | 1981-10-08 | Wire dot head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5862067A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60187563A (en) * | 1984-03-07 | 1985-09-25 | Tokyo Electric Co Ltd | Dot printer head |
| JPS60262667A (en) * | 1984-06-11 | 1985-12-26 | Matsushita Electric Works Ltd | Guide member for printing wire in dot printer and manufacture thereof |
| JPS6168255A (en) * | 1984-09-13 | 1986-04-08 | Tokyo Electric Co Ltd | Preparation of dot printer head |
| JPH0611787Y2 (en) * | 1988-04-26 | 1994-03-30 | 京セラ株式会社 | Wire guide for dot printer |
| KR0166101B1 (en) * | 1993-10-21 | 1999-01-15 | 김주용 | A transistor for esd protection circuit and its fabricating method |
| JP4248566B2 (en) * | 2006-06-30 | 2009-04-02 | 株式会社沖データ | Impact head and impact printer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS501820A (en) * | 1973-04-26 | 1975-01-09 | ||
| JPS5213917A (en) * | 1976-07-16 | 1977-02-02 | Canon Kk | Type needle unit for pin matrix printer |
| JPS5280919A (en) * | 1975-12-26 | 1977-07-07 | Hitachi Ltd | Dot printer bearing unit |
| JPS52134512A (en) * | 1976-05-04 | 1977-11-10 | Mannesmann Ag | Printing head for needle printer having printing needle guide mechanism |
| JPS5340317A (en) * | 1976-09-24 | 1978-04-12 | Tokyo Shibaura Electric Co | Method of producing dot printer printing needle guide |
-
1981
- 1981-10-08 JP JP16042181A patent/JPS5862067A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS501820A (en) * | 1973-04-26 | 1975-01-09 | ||
| JPS5280919A (en) * | 1975-12-26 | 1977-07-07 | Hitachi Ltd | Dot printer bearing unit |
| JPS52134512A (en) * | 1976-05-04 | 1977-11-10 | Mannesmann Ag | Printing head for needle printer having printing needle guide mechanism |
| JPS5213917A (en) * | 1976-07-16 | 1977-02-02 | Canon Kk | Type needle unit for pin matrix printer |
| JPS5340317A (en) * | 1976-09-24 | 1978-04-12 | Tokyo Shibaura Electric Co | Method of producing dot printer printing needle guide |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5862067A (en) | 1983-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3505734A (en) | Cutting blade with self-contained guard | |
| US6148534A (en) | Tape rule with an elaborate buffer | |
| JPH0380111B2 (en) | ||
| US4410290A (en) | Composite pen tip | |
| US4437103A (en) | Ink-jet nozzle and a method for manufacturing same | |
| US4757412A (en) | Disk cartridge | |
| JPH10500800A (en) | Tape guide for data cartridge | |
| US5860612A (en) | Guides for magnetic tape and method of making the same | |
| GB2137165A (en) | Magnetic tape cassette | |
| EP0385359A2 (en) | Magnetic head | |
| US6851644B2 (en) | Conveying roller for photosensitive material and method of producing the same | |
| US5774306A (en) | Multi-channel, high speed, tape head contour | |
| FR2504061B1 (en) | PRINTHEAD ACTUATION MECHANISM ALONG A CIRCULAR ARC PATH WITH A TANGENT END AT THE AXIS OF THE INK STORAGE CARTRIDGE | |
| EP0084630B1 (en) | Printing ribbon cartridge | |
| EP4000823B1 (en) | Double direction shaving head | |
| JPH06213602A (en) | Tape measure | |
| US5716018A (en) | Tape guide for digital data tape mini-cartridge | |
| JP2725416B2 (en) | Tape cassette | |
| JPH0327796Y2 (en) | ||
| US4438887A (en) | Grooved traverse drum for use in drum winder | |
| US5601248A (en) | Tape guide for digital data tape mini-cartridge | |
| DE3820261A1 (en) | MAGNETIC TAPE CASSETTE AND METHOD FOR PRODUCING THE SAME | |
| JPS6341183Y2 (en) | ||
| JPH0611787Y2 (en) | Wire guide for dot printer | |
| US2727704A (en) | Strand guide |