JPH0449477B2 - - Google Patents
Info
- Publication number
- JPH0449477B2 JPH0449477B2 JP61060906A JP6090686A JPH0449477B2 JP H0449477 B2 JPH0449477 B2 JP H0449477B2 JP 61060906 A JP61060906 A JP 61060906A JP 6090686 A JP6090686 A JP 6090686A JP H0449477 B2 JPH0449477 B2 JP H0449477B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- electromagnet
- coil
- temperature
- wires
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- 235000016496 Panda oleosa Nutrition 0.000 description 1
- 240000000220 Panda oleosa Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005549 size reduction Methods 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
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Dot-Matrix Printers And Others (AREA)
- Impact Printers (AREA)
Description
【発明の詳細な説明】
〔概要〕
ワイヤドツト印字ヘツドであつて、電磁石のコ
イルの発熱による焼損を防止するために印字ヘツ
ドに温度センサを設ける場合にそれを使用頻度が
最も高いワイヤの電磁石のコイルに設けることに
より、印字ヘツドの構造簡略化及びコスト低減な
らびに信頼性の高い温度検知を可能としたもので
ある。[Detailed Description of the Invention] [Summary] A coil of a wire electromagnet, which is a wire dot printing head and is most frequently used when a temperature sensor is provided in the print head to prevent burnout due to heat generation of the electromagnet coil. By providing the temperature sensor in the print head, the structure of the print head can be simplified, the cost can be reduced, and highly reliable temperature detection can be achieved.
本発明はワイヤドツト印字ヘツドに関し、特に
ワイヤ駆動用電磁石のコイル焼損防止のための温
度センサの配置構造に関するものである。
The present invention relates to a wire dot printing head, and more particularly to a structure for arranging a temperature sensor to prevent coil burnout of a wire driving electromagnet.
ワイヤドツト印字ヘツドのワイヤ駆動は、種々
の方式(吸引型、釈放型)があるが、原理的には
各ワイヤごとに設けられた電磁石を選択的に励磁
することによりなされる。しかるに電磁石の励磁
には発熱が伴い、例えば長時間連続駆動した場合
にコイルが高温になつて焼損するという問題があ
る。その対策として印字ヘツドに温度センサを設
けて温度を監視し、温度が許容限界に達すると印
字を中断するか、あるいはまたワイヤを複数群に
分け、それらを順番に使用して通常1行程分の印
字を複数行程で印字する分割印字に切り替える等
の対策を講じている。しかし従来は温度センサの
配設構造上問題があり、その対策が課題となつて
いる。 There are various methods (attraction type, release type) for wire driving the wire dot print head, but in principle it is achieved by selectively exciting an electromagnet provided for each wire. However, excitation of the electromagnet is accompanied by heat generation, and there is a problem that, for example, when the electromagnet is driven continuously for a long time, the coil becomes hot and burns out. To counter this, you can either install a temperature sensor in the print head to monitor the temperature and stop printing when the temperature reaches an acceptable limit, or you can divide the wire into groups and use them in sequence, typically for one stroke. We are taking measures such as switching to split printing, which prints in multiple strokes. However, conventional methods have had problems with the arrangement structure of temperature sensors, and countermeasures have been an issue.
従来は、温度センサを各電磁石のコイルごとに
1つずつ設けるか、あるいは印字ヘツドのケーシ
ングの外表面または印字ヘツド内部に温度センサ
を1つだけ設ける構造が採用されている。
Conventionally, a temperature sensor is provided for each electromagnet coil, or a single temperature sensor is provided on the outer surface of the print head casing or within the print head.
前記従来構造では、前者のコイルごとに温度セ
ンサを設けた場合、各コイルの温度を監視できる
のでコイル焼損防止の点では有効であるが、コス
トが高くなり、また印字ヘツドの小型化の点で不
利である。一方、後者の温度センサを1つしか設
けない場合は、コストや小型化の点では有利であ
るが、温度センサ付近のコイル温度は精度よく検
知できても遠い位置のコイル温度を正確に検知で
きず、信頼性に欠けるという問題がある。
In the conventional structure described above, if a temperature sensor is provided for each coil, the temperature of each coil can be monitored, which is effective in preventing coil burnout, but it increases the cost and is difficult to miniaturize the print head. It is disadvantageous. On the other hand, the latter case, where only one temperature sensor is provided, is advantageous in terms of cost and miniaturization, but even though the coil temperature near the temperature sensor can be detected accurately, the coil temperature at a far position cannot be accurately detected. First, there is the problem of lack of reliability.
本発明は上記従来技術の問題点を解決するた
め、印字ヘツドのワイヤは印字の際の使用頻度に
差があることに着目し、使用頻度の高いワイヤの
電磁石に対応して温度センサを設けた構造とする
ものである。
In order to solve the above-mentioned problems of the prior art, the present invention focuses on the fact that the wires of the printing head are used differently during printing, and provides temperature sensors corresponding to the electromagnets of the wires that are used frequently. It is a structure.
上記の構造によれば、使用頻度の高い、つまり
高温になりやすいコイルの温度が監視されるの
で、高い信頼性が得られる。また、使用頻度の高
いワイヤは小数であり、従つて温度センサも小数
で済むので、コスト及び小型化の点でも有利であ
る。
According to the above structure, the temperature of the coil that is used frequently, that is, tends to reach high temperatures, is monitored, so high reliability can be obtained. Further, since the number of frequently used wires is small, and therefore the number of temperature sensors is also small, it is advantageous in terms of cost and miniaturization.
以下、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 based on the drawings.
第1図は本発明によるワイヤドツト印字ヘツド
の実施例を示し、Aはその縦断面図、BはAのB
−B矢視図である。この印字ヘツドは24ドツト釈
放型のものであり、ワイヤWは環状に配置された
板バネ1の先端部に設けられ、通常(非駆動状
態)は板バネ1の中央部に設けたアーマチユア2
が永久磁石3による磁石によつて電磁石Mのコア
に吸引され、板バネ1に弾性力がチヤージされ
る。印字の際、電磁石Mのコイルが励磁され、永
久磁石3による磁力が打ち消されると、板バネ1
が釈放され、その弾性力によつてワイヤWが駆動
され、ワイヤガイド4から突出して印字を行う。 FIG. 1 shows an embodiment of a wire dot printing head according to the present invention, A is a longitudinal sectional view thereof, and B is a B of A.
-B arrow view. This print head is of a 24-dot release type, and the wire W is provided at the tip of the leaf spring 1 arranged in an annular shape, and normally (in the non-driven state), the wire W is attached to the armature 2 provided at the center of the leaf spring 1.
is attracted to the core of the electromagnet M by the permanent magnet 3, and the leaf spring 1 is charged with elastic force. During printing, when the coil of the electromagnet M is excited and the magnetic force of the permanent magnet 3 is canceled out, the leaf spring 1
is released, and the wire W is driven by its elastic force to protrude from the wire guide 4 and perform printing.
第2図はワイヤWの先端(つまりワイヤガイド
4のガイド孔)の配列の一列を示し、図示例では
2列千鳥状配列となつている。尚、符号W1〜W
24はワイヤの番号を示し、左側列には奇数番号
のワイヤW1,W3……,W21,W23が、ま
た右側列には偶数番号のワイヤW2,W4……,
W22,W24がそれぞれ並んでいる。このよう
なワイヤ配列の場合、ワイヤどうしが交差しない
ように、電磁石Mは第1図Bに示すように左側半
分の電磁石M1,M3,……,M21,M23が
ワイヤW1,W3……,W21,W23の駆動に
用いられ、右側半分の電磁石M2,M4,……,
M22,M24がワイヤW2,W4……,W2
2,W24の駆動に用いられる。 FIG. 2 shows one row of the arrangement of the tips of the wires W (that is, the guide holes of the wire guide 4), and in the illustrated example, they are arranged in two rows in a staggered manner. In addition, the codes W1 to W
24 indicates the wire numbers; the left column has odd numbered wires W1, W3..., W21, W23, and the right column has even numbered wires W2, W4...,
W22 and W24 are lined up. In the case of such a wire arrangement, in order to prevent the wires from crossing each other, the electromagnet M is connected to the left half of the electromagnets M1, M3, ..., M21, M23 as shown in FIG. , W23, and the right half electromagnets M2, M4, ...,
M22, M24 are wires W2, W4..., W2
2. Used to drive W24.
さて、第2図に示すようなワイヤ配列でアルフ
アベツト、数字、仮名、第1水準漢字の印字を行
つた場合、各ワイヤW1〜W24の使用頻度は第
3図に示す如くであり、第7番ワイヤW7が最も
高く、第12番ワイヤW12がこれについで高い。
尚、罫線印字の場合は第12番ワイヤW12が使用
されるので、これを考慮すると第12番ワイヤW1
2の方が第7番ワイヤW7よりも使用頻度が高く
なることも考える。 Now, when printing alphabets, numbers, kana, and first-level kanji using the wire arrangement shown in Figure 2, the frequency of use of each wire W1 to W24 is as shown in Figure 3, and the frequency of use of wires W1 to W24 is as shown in Figure 3. Wire W7 is the highest, followed by No. 12 wire W12.
In addition, in the case of ruled line printing, the 12th wire W12 is used, so taking this into consideration, the 12th wire W1
It is also considered that wire No. 2 is used more frequently than wire No. 7 W7.
つまり上記のようなワイヤ配列では第7番及び
第12番のワイヤW7,W12の電磁石M7及びM
12のいずれかあるいは両方が最も高温になる。
従つて第1図の特にBに示すように、電磁石M7
及びM12のいずれか一方または両方のコイルの
近傍に温度センサSを設けて、これらのコイルの
温度を監視するようにする。この結果、電磁石M
7,M12のコイル温度が許容限界に達したら前
述したように印字を停止するか分割印字に切り替
えることによつてコイル焼損を防止することが可
能である。 In other words, in the above wire arrangement, the electromagnets M7 and M of the 7th and 12th wires W7 and W12
Either or both of 12 will be at the highest temperature.
Therefore, as shown in FIG. 1, especially at B, the electromagnet M7
A temperature sensor S is provided near one or both coils of M12 and M12 to monitor the temperature of these coils. As a result, electromagnet M
7. When the coil temperature of M12 reaches the permissible limit, it is possible to prevent coil burnout by stopping printing or switching to divided printing as described above.
尚、印字ヘツドのワイヤの本数や配列ならびに
印字態様によつてワイヤの使用頻度が異なるが、
それぞれについてワイヤ使用頻度を判定し、それ
に基づいて温度センサの数及び配置を決定するこ
とができる。この場合、使用頻度が特に高いワイ
ヤはせいぜい1〜3本であり、従つて温度センサ
の数は非常に少なくて済む。 Note that the frequency of wire use varies depending on the number and arrangement of wires in the print head, as well as the printing mode.
The frequency of wire usage for each can be determined and the number and placement of temperature sensors can be determined based thereon. In this case, the number of wires that are used particularly frequently is at most 1 to 3, and therefore the number of temperature sensors can be very small.
以上のように本発明によれば、温度センサを使
用頻度の高いワイヤの電磁石のコイルに設けるこ
とによつて確実なコイル焼損防止を実現可能であ
り、しかも温度センサの数が少なくて済むのでコ
スト及び小型化の点で有利であるというすぐれた
効果が得られる。
As described above, according to the present invention, by providing a temperature sensor in the frequently used coil of a wire electromagnet, it is possible to reliably prevent coil burnout, and furthermore, because the number of temperature sensors is small, it is possible to reduce costs. Excellent effects such as advantages in terms of size reduction and miniaturization can be obtained.
第1図は本発明によるワイヤドツト印字ヘツド
の実施例を示す図、第2図はワイヤ先端配列図、
第3図はワイヤ使用頻度図である。
W,W1〜W24……ドツトワイヤ、M,M1
〜24……電磁石、S……温度センサ、1……板
バネ、2……アーマチユア、3……永久磁石、4
……ワイヤガイド。
FIG. 1 is a diagram showing an embodiment of the wire dot printing head according to the present invention, FIG. 2 is a diagram of the wire tip arrangement,
FIG. 3 is a wire usage frequency diagram. W, W1 to W24...dot wire, M, M1
~24... Electromagnet, S... Temperature sensor, 1... Leaf spring, 2... Armature, 3... Permanent magnet, 4
...Wire guide.
Claims (1)
れた電磁石を選択的に励磁して駆動するワイヤド
ツト印字ヘツドにおいて、使用頻度の高いワイヤ
の電磁石に対応して温度センサを設けたことを特
徴とするワイヤドツト印字ヘツド。1. A wire dot printing head that drives a plurality of dot wires by selectively exciting an electromagnet provided for each wire, which is characterized by being equipped with a temperature sensor corresponding to the electromagnet of the wire that is frequently used. Head.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61060906A JPS62218144A (en) | 1986-03-20 | 1986-03-20 | Wire dot printing head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61060906A JPS62218144A (en) | 1986-03-20 | 1986-03-20 | Wire dot printing head |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62218144A JPS62218144A (en) | 1987-09-25 |
JPH0449477B2 true JPH0449477B2 (en) | 1992-08-11 |
Family
ID=13155871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61060906A Granted JPS62218144A (en) | 1986-03-20 | 1986-03-20 | Wire dot printing head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62218144A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0357034U (en) * | 1989-10-11 | 1991-05-31 | ||
JP4531299B2 (en) * | 2001-07-02 | 2010-08-25 | 東芝テック株式会社 | Printing device |
-
1986
- 1986-03-20 JP JP61060906A patent/JPS62218144A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS62218144A (en) | 1987-09-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |