JPS647589B2 - - Google Patents
Info
- Publication number
- JPS647589B2 JPS647589B2 JP4318181A JP4318181A JPS647589B2 JP S647589 B2 JPS647589 B2 JP S647589B2 JP 4318181 A JP4318181 A JP 4318181A JP 4318181 A JP4318181 A JP 4318181A JP S647589 B2 JPS647589 B2 JP S647589B2
- Authority
- JP
- Japan
- Prior art keywords
- platen roller
- thermal
- recording
- heating element
- thermal head
- 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
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000001454 recorded image Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
Landscapes
- Handling Of Sheets (AREA)
- Electronic Switches (AREA)
Description
【発明の詳細な説明】
本発明は感熱記録装置に係り、特にそのプラテ
ンローラの取付構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal recording device, and particularly to a mounting structure for a platen roller thereof.
従来周知のように、感熱記録装置は、第１図に
示す如く、圧接するプラテンローラ１とサーマル
ヘツド２間に感熱記録紙３を挾み込み、サーマル
ヘツド２上の各発熱素子２ａを書画情報に応じて
発熱させることにより、感熱記録紙３を発色さ
せ、書画情報を記録するものである。通常、プラ
テンローラ１は多少弾力を有するシリコンゴム、
クロロプレンゴム等を用いて形成される。一方、
サーマルヘツド２は基板上に１ライン分の発熱素
子２ａが配列され、その表面が５酸化タンタル
（Ta2O5）、酸化シリコン（SiC）等の保護膜で被
われて成る。 As is well known in the art, in a thermal recording device, as shown in FIG. 1, a thermal recording paper 3 is sandwiched between a platen roller 1 and a thermal head 2 that are in pressure contact with each other, and each heating element 2a on the thermal head 2 is used to record image information. By generating heat in accordance with the temperature, the thermosensitive recording paper 3 is colored, and calligraphy information is recorded. Usually, the platen roller 1 is made of silicone rubber that has some elasticity.
It is formed using chloroprene rubber etc. on the other hand,
The thermal head 2 consists of one line of heating elements 2a arranged on a substrate, the surface of which is covered with a protective film of tantalum pentoxide (Ta 2 O 5 ), silicon oxide (SiC), or the like.
ところで、感熱記録紙３上に良好な記録画像を
得るには、感熱記録紙３を発熱素子２ａに強く密
着させる必要がある。このため従来は、発熱素子
２ａの中心線４上の位置１ａにプラテンローラ１
の回転軸を取り付け、プラテンローラ１が多少変
形する程度の圧接力を加えて記録を行つていた。 By the way, in order to obtain a good recorded image on the thermal recording paper 3, it is necessary to bring the thermal recording paper 3 into close contact with the heating element 2a. For this reason, conventionally, the platen roller 1 is placed at the position 1a on the center line 4 of the heating element 2a.
A rotating shaft was attached to the platen roller 1, and recording was performed by applying a pressing force to the extent that the platen roller 1 was slightly deformed.
しかし、上記従来装置では、濃度ムラが生じ、
良好な記録画像が得られなくなる欠点があつた。 However, with the above conventional device, density unevenness occurs,
There was a drawback that good recorded images could not be obtained.
本発明は、その原因を解明し、上記従来装置の
欠点を取り除くことにより、良好な記録画像の得
られる感熱記録装置を提供することを目的とす
る。 An object of the present invention is to provide a heat-sensitive recording device that can obtain good recorded images by elucidating the cause and eliminating the drawbacks of the conventional devices.
以下、本発明を図面を参照して説明する。 Hereinafter, the present invention will be explained with reference to the drawings.
第２図は、本発明の一実施例を示す感熱記録装
置の構造説明図で、図中、第１図と同一符号は同
一又は相当部分を示す。 FIG. 2 is a structural explanatory diagram of a thermosensitive recording device showing an embodiment of the present invention, and in the figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts.
第２図の構成で、第１図と異なる点は、プラテ
ンローラ１の圧接中心に対して発熱素子２ａの中
心線４を感熱記録紙３の進行方向と逆側にαだけ
ずらした位置にサーマルヘツド２を取り付けた点
である。また、１ｂはこの場合のプラテンローラ
１の回転軸の位置である。 The configuration shown in FIG. 2 is different from that shown in FIG. This is the point where head 2 was attached. Further, 1b is the position of the rotation axis of the platen roller 1 in this case.
感熱記録装置をこのように構成することによ
り、濃度ムラのない良好な記録画像が得られるよ
うになる。 By configuring the thermal recording device in this way, it becomes possible to obtain a good recorded image without density unevenness.
即ち、出願人は、前述第１図に示した従来装置
における記録状態を種々の条件の下に調べたとこ
ろ、長時間使用し、プラテンローラ１の摩耗が発
生したとき、特に濃度ムラが著しくなることが判
つた。従つて、この点から記録時におけるプラテ
ンローラ１の状態を更に詳しく調べたところ、感
熱記録紙３をプラテンローラ１、サーマルヘツド
２間にセツトした初期状態では、第３図に示す如
く、発熱素子２ａの中心位置Ｏに対して、プラテ
ンローラ１はその回転方向前後に平均して接触し
ているが、記録動作時には、第４図に示す如く、
回転によりプラテンローラ１が変形し、その接触
面が回転方向と逆方向にずれる場合のあることが
判つた。一方、接触圧と記録濃度との関係は、第
５図に示す関係にあり、接触圧がある値以下にな
ると、記録濃度が急激に低下する。 That is, the applicant investigated the recording state of the conventional apparatus shown in FIG. It turned out that. Therefore, from this point of view, we investigated in more detail the state of the platen roller 1 during recording, and found that in the initial state when the thermal recording paper 3 is set between the platen roller 1 and the thermal head 2, the heating element is not activated as shown in FIG. The platen roller 1 is in contact with the center position O of the roller 2a on the average in both directions of rotation, but during the recording operation, as shown in FIG.
It has been found that the platen roller 1 may be deformed due to rotation, and its contact surface may be displaced in a direction opposite to the direction of rotation. On the other hand, the relationship between the contact pressure and the recording density is as shown in FIG. 5, and when the contact pressure falls below a certain value, the recording density rapidly decreases.
このことから出願人は、プラテンローラ１の回
転軸が発熱素子２ａの中心線上に設けられる従来
装置においては、記録動作時、プラテンローラ１
の変形状態によつては発熱素子２ａの全面に均一
な接触圧が得られぬ場合が生じる結果、濃度ムラ
が生じるものと推測した。また、このような観点
からプラテンローラ１の摩耗時における濃度ムラ
を考えると、摩耗によるプラテンローラ１の変形
が更にローラ回転時における接触面のずれを助長
し濃度ムラを著しくすることとも符合する。 For this reason, the applicant believes that in the conventional apparatus in which the rotation axis of the platen roller 1 is provided on the center line of the heat generating element 2a, during the recording operation, the platen roller 1
It is assumed that depending on the deformation state of the heating element 2a, a uniform contact pressure may not be obtained over the entire surface of the heating element 2a, resulting in density unevenness. Furthermore, considering the density unevenness when the platen roller 1 is worn from this viewpoint, it is also consistent with the fact that the deformation of the platen roller 1 due to wear further promotes the displacement of the contact surface when the roller rotates, making the density unevenness significant.
そこで、前述の第２図で説明した如く、プラテ
ンローラ１の圧接中心に対して、サーマルヘツド
２を感熱記録紙３の進行方向と逆側にαだけずら
して取り付け、その記録状態を調べてみた。 Therefore, as explained in FIG. 2 above, the thermal head 2 was mounted offset by α in the direction opposite to the advancing direction of the thermal recording paper 3 with respect to the center of pressure contact of the platen roller 1, and the recording state was investigated. .
このとき、プラテンローラ１はゴム硬度40〜50
度、直径16〜32mm、サーマルヘツド２は50〜70×
250×７mmのものを使用し、圧接力は３〜５Kgを
加え、サーマルヘツド２の取付位置をプラテンロ
ーラ１の圧接中心からα＝0.2〜0.5mmずらした状
態で実験した。 At this time, the platen roller 1 has a rubber hardness of 40 to 50.
degree, diameter 16 to 32 mm, thermal head 2 is 50 to 70
The experiment was conducted using a 250 x 7 mm one, applying a pressing force of 3 to 5 kg, and shifting the mounting position of the thermal head 2 from the pressing center of the platen roller 1 by α=0.2 to 0.5 mm.
この結果、プラテンローラ１の材質および直
径、圧接力、発熱素子２ａの幅等に応じてαの値
を調整することにより、記録動作時におけるプラ
テンローラ１の変形状態の如何によらず、濃度ム
ラのない良好な記録画像が得られた。また、摩耗
したローラを使用した場合も従来装置のような著
しい濃度ムラが無くなつた。 As a result, by adjusting the value of α according to the material and diameter of the platen roller 1, the pressure contact force, the width of the heating element 2a, etc., density unevenness can be prevented regardless of the deformation state of the platen roller 1 during the recording operation. A good recorded image was obtained. Furthermore, even when a worn roller is used, there is no significant density unevenness as seen in the conventional apparatus.
以上のように、本発明によれば、サーマルヘツ
ドを発熱素子の中心がプラテンローラの圧接中心
から感熱記録紙の進行方向と逆側にずれるように
取付けたので、濃度ムラが無くなり、良好な記録
画像が得られる。 As described above, according to the present invention, since the thermal head is mounted so that the center of the heating element is shifted from the center of pressure contact of the platen roller to the opposite side of the traveling direction of the thermal recording paper, density unevenness is eliminated and good recording is achieved. An image is obtained.
第１図は従来の感熱記録装置の構造説明図、第
２図は本発明の感熱記録装置の構造説明図、第３
図および第４図は、従来の感熱記録装置における
プラテンローラの初期状態および動作時における
変形状態説明図、第５図は接触圧と記録濃度との
関係図である。
１……プラテンローラ、２……サーマルヘツ
ド、２ａ……発熱素子、３……感熱記録紙、４…
…中心線。
FIG. 1 is a structural explanatory diagram of a conventional thermal recording device, FIG. 2 is a structural explanatory diagram of a thermal recording device of the present invention, and FIG.
4 and 4 are explanatory diagrams of the initial state and deformation state of the platen roller in the conventional thermal recording apparatus during operation, and FIG. 5 is a diagram of the relationship between contact pressure and recording density. 1...Platen roller, 2...Thermal head, 2a...Heating element, 3...Thermal recording paper, 4...
...center line.
Claims (1)
感熱記録装置において、サーマルヘツドを、発熱
素子中心位置がプラテンローラの圧接中心から記
録紙の進行方向と逆側にずらした位置になるよう
に取り付けたことを特徴とする感熱記録装置。1. A thermal recording device consisting of a thermal head and a platen roller, characterized in that the thermal head is mounted so that the center of the heating element is offset from the center of pressure contact of the platen roller in the direction opposite to the traveling direction of the recording paper. A thermal recording device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4318181A JPS57157771A (en) | 1981-03-26 | 1981-03-26 | Heat-sensitive recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4318181A JPS57157771A (en) | 1981-03-26 | 1981-03-26 | Heat-sensitive recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57157771A JPS57157771A (en) | 1982-09-29 |
| JPS647589B2 true JPS647589B2 (en) | 1989-02-09 |
Family
ID=12656719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4318181A Granted JPS57157771A (en) | 1981-03-26 | 1981-03-26 | Heat-sensitive recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57157771A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0806298B1 (en) * | 1996-05-09 | 2002-02-27 | Agfa-Gevaert | Thermal printer with adjustable thermal head |
| KR100694103B1 (en) | 2005-04-20 | 2007-03-12 | 삼성전자주식회사 | Thermal Image Forming Device |
-
1981
- 1981-03-26 JP JP4318181A patent/JPS57157771A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57157771A (en) | 1982-09-29 |
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