JPH08150761A - Mechanism for printing in printer - Google Patents
Mechanism for printing in printerInfo
- Publication number
- JPH08150761A JPH08150761A JP29282694A JP29282694A JPH08150761A JP H08150761 A JPH08150761 A JP H08150761A JP 29282694 A JP29282694 A JP 29282694A JP 29282694 A JP29282694 A JP 29282694A JP H08150761 A JPH08150761 A JP H08150761A
- Authority
- JP
- Japan
- Prior art keywords
- platen
- medium
- thickness
- carrying
- measuring
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はプリンタ印字機構に関
し、特にプラテンの移動により印字間隙の自動調整を行
うプリンタ印字機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer printing mechanism, and more particularly to a printer printing mechanism for automatically adjusting a printing gap by moving a platen.
【０００２】[0002]
【従来の技術】図４（ａ）および（ｂ）は、従来のプリ
ンタ印字機構の一例を示す構成図である。図４（ａ）は
印字ヘッド６を移動させて印字間隙を調整する方式であ
り、駆動源４により、ギヤ１１ａおよび１１ｂを介し、
印字ヘッド６をプラテン１３に対し軸９を中心にＥ方向
に移動させる。また、図４（ｂ）はプラテン１４を移動
させて印字間隙を調整する方式であり、駆動源４により
カム軸７を回転させ、Ｄ方向に自由度を持つフォロア８
をプラテン１４に固定し、カム軸７がフォロア８を押し
上げることによりプラテン１４が上下移動する。2. Description of the Related Art FIGS. 4A and 4B are structural views showing an example of a conventional printer printing mechanism. FIG. 4A shows a system in which the print head 6 is moved to adjust the print gap, and the drive source 4 causes the gears 11a and 11b to move.
The print head 6 is moved in the E direction about the shaft 9 with respect to the platen 13. Further, FIG. 4B shows a system in which the platen 14 is moved to adjust the print gap, and the cam shaft 7 is rotated by the drive source 4 and the follower 8 having a degree of freedom in the D direction.
Is fixed to the platen 14, and the cam shaft 7 pushes up the follower 8 to move the platen 14 up and down.
【０００３】図５は、図４（ｂ）に示した従来例の動作
概要図である。図５（ａ）に示すように、媒体１０がＡ
方向から搬送され、厚さ検出部１により厚さが測定され
る。媒体１０の先端がプラテン１４の上部に到達したと
き、図５（ｂ）に示すように、駆動源４が厚さ検出部１
において測定した値に応じてＡ方向に回転し、プラテン
１４がＤ方向に移動する。これによって、媒体厚に影響
なく、印字ヘッド６と媒体１０との間の印字高さｔを一
定にすることができる。FIG. 5 is a schematic diagram of the operation of the conventional example shown in FIG. 4 (b). As shown in FIG. 5A, the medium 10 is A
It is conveyed from the direction, and the thickness is measured by the thickness detecting unit 1. When the tip of the medium 10 reaches the upper part of the platen 14, the drive source 4 causes the thickness detecting unit 1 to move, as shown in FIG.
The platen 14 rotates in the A direction in accordance with the value measured in the above, and the platen 14 moves in the D direction. Thereby, the print height t between the print head 6 and the medium 10 can be made constant without affecting the medium thickness.
【０００４】[0004]
【発明が解決しようとする課題】この従来のプリンタ印
字機構では、プラテンを移動させる機構が複雑であるた
め構成部品数が多くなる。また、プラテンに対し媒体搬
送方向両側に備えた搬送ガイドとの間に間隙を設けなけ
ればならないので、媒体がこの間隙に入り込んで搬送不
良を生じてしまう。In this conventional printer printing mechanism, since the mechanism for moving the platen is complicated, the number of constituent parts increases. Further, since a gap has to be provided between the platen and the conveyance guides provided on both sides of the medium in the medium conveyance direction, the medium may enter this gap and cause conveyance failure.
【０００５】[0005]
【課題を解決するための手段】本発明のプリンタ印字機
構は、媒体厚を媒体搬送中に測定する厚さ検出部と、自
在回転軸上に規則的に配置した複数個の偏心ローラで構
成するプラテンと、前記厚さ検出部で測定した前記媒体
厚に応じ印字ヘッドと前記プラテンとの間隙を前記プラ
テンを回転させるときの偏心量を利用して調整する駆動
源とを備える。A printer printing mechanism of the present invention comprises a thickness detecting portion for measuring the thickness of a medium during conveyance of the medium, and a plurality of eccentric rollers regularly arranged on a free rotating shaft. A platen and a drive source that adjusts a gap between the print head and the platen according to the medium thickness measured by the thickness detection unit by utilizing an eccentric amount when the platen is rotated.
【０００６】また、本発明のプリンタ印字機構は、前記
プラテンを逃げる複数個の穴を有する搬送ガイドを備え
る。Further, the printer printing mechanism of the present invention is provided with a conveyance guide having a plurality of holes for allowing the platen to escape.
【０００７】[0007]
【実施例】次に、本発明について図面を参照して説明す
る。図１は本発明の一実施例の構成を示す構成図で、図
１（ａ）はその平面図、図１（ｂ）はその側面図であ
る。図１を参照すると、この実施例のプリンタ印字機構
は、媒体厚を媒体搬送中に測定する厚さ検出部１と、自
在回転軸上に規則的に配置した複数個の偏心ローラで構
成するプラテン３と、プラテン３を逃げる複数個の穴ａ
を有する搬送ガイド５と、厚さ検出部１で測定した媒体
厚に応じ印字ヘッド６とプラテン３との間隙をプラテン
３を回転させるときの偏心量を利用して調整する駆動源
４とから構成される。Next, the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a configuration of an embodiment of the present invention, FIG. 1 (a) is a plan view thereof, and FIG. 1 (b) is a side view thereof. Referring to FIG. 1, the printer printing mechanism of this embodiment is a platen composed of a thickness detecting unit 1 for measuring a medium thickness during conveyance of the medium and a plurality of eccentric rollers regularly arranged on a free rotating shaft. 3 and a plurality of holes a through which the platen 3 escapes
And a drive source 4 that adjusts the gap between the print head 6 and the platen 3 according to the medium thickness measured by the thickness detection unit 1 by using the eccentricity when the platen 3 is rotated. To be done.
【０００８】図２はこの実施例の動作概要図であり、図
２（ａ）は厚い媒体に印字する場合を、図２（ｂ）は薄
い媒体に印字する場合を示す。図２を図１に併せて参照
して、この実施例の動作を説明する。図２において、印
字する媒体１０が搬送方向Ａから搬送され、印字ヘッド
６に到達する前に厚さ検出部１によって厚さが測定され
る。媒体１０が更にＡ方向に搬送され印字ヘッド６に到
達すると、駆動源４が厚さ検出部１で測定した値に応じ
て必要な角度だけＢ方向へ回転し、同時にプラテン３が
Ｃ方向へ回転する。これによって、厚さの違う媒体であ
ってもプラテン３を必要なだけ回転させることで、印字
ヘッド６とプラテン３との間の印字間隙を調整し、印字
ヘッド６と媒体１０との間の印字高さを一定にすること
ができる。2A and 2B are schematic diagrams of the operation of this embodiment. FIG. 2A shows a case of printing on a thick medium, and FIG. 2B shows a case of printing on a thin medium. The operation of this embodiment will be described with reference to FIG. 2 together with FIG. In FIG. 2, the medium 10 to be printed is transported in the transport direction A, and the thickness is measured by the thickness detection unit 1 before reaching the print head 6. When the medium 10 is further conveyed in the A direction and reaches the print head 6, the drive source 4 rotates in the B direction by a necessary angle according to the value measured by the thickness detection unit 1, and at the same time, the platen 3 rotates in the C direction. To do. Accordingly, even if the media have different thicknesses, by rotating the platen 3 as much as necessary, the print gap between the print head 6 and the platen 3 is adjusted, and the print between the print head 6 and the medium 10 is performed. The height can be made constant.
【０００９】図３は、この実施例の印字時の搬送ガイド
の効果を説明する図であり、図３（ａ）は媒体挿入時
を、図３（ｂ）は印字高さ調整時を示す。図３を図１に
併せて参照すると、プラテン３の両側にある搬送ガイド
５は、プラテン３の上部でつながっていて、プラテン３
が回転する場合の偏心ローラを逃げるための穴ａを偏心
ローラと同数だけ有する。これによって、プラテン３と
搬送ガイド５との間の溝が無くなり、媒体１０の先端が
この溝に入り込むことが原因で生じる搬送不良を防ぐこ
とができる。3A and 3B are views for explaining the effect of the conveyance guide during printing in this embodiment. FIG. 3A shows the time when the medium is inserted, and FIG. 3B shows the time when the print height is adjusted. Referring to FIG. 3 together with FIG. 1, the transport guides 5 on both sides of the platen 3 are connected to each other at the upper part of the platen 3 and
Has holes a for escaping the eccentric roller when rotating. As a result, the groove between the platen 3 and the conveyance guide 5 is eliminated, and it is possible to prevent the conveyance failure caused by the leading edge of the medium 10 entering this groove.
【００１０】[0010]
【発明の効果】以上説明したように、本発明によれば、
媒体厚を媒体搬送中に測定し、自在回転軸上に規則的に
配置した複数個の偏心ローラで構成するプラテンと印字
ヘッドとの間隙を厚さ検出部で測定した媒体厚に応じ駆
動源によりプラテンを回転させるときの偏心量を利用し
て調整することにより、構成部品の大幅な削減が可能に
なる。As described above, according to the present invention,
The media thickness is measured during transport, and the gap between the platen and the print head, which is composed of a plurality of eccentric rollers arranged regularly on the free rotation axis, is measured by the drive source according to the media thickness measured by the thickness detection unit. By adjusting the amount of eccentricity when rotating the platen, it is possible to significantly reduce the number of components.
【００１１】また、プラテンを逃げる複数個の穴を有す
る搬送ガイドを備えることにより、プラテンと搬送ガイ
ドとの溝がなくなり、この溝に媒体が入り込むことによ
って生じる搬送不良を防ぐことが可能になる。Further, by providing the transport guide having a plurality of holes for allowing the platen to escape, the groove between the platen and the transport guide is eliminated, and it becomes possible to prevent the transport failure caused by the medium entering the groove.
【図１】本発明の一実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment of the present invention.
【図２】この実施例の動作概要図である。FIG. 2 is a schematic diagram of the operation of this embodiment.
【図３】この実施例の動作概要図である。FIG. 3 is a schematic diagram of the operation of this embodiment.
【図４】従来例の構成図である。FIG. 4 is a configuration diagram of a conventional example.
【図５】従来例の動作概要図である。FIG. 5 is an operation outline diagram of a conventional example.
【符号の説明】 １ 厚さ検出部 ２ 軸 ３ プラテン ４ 駆動源 ５ 搬送ガイド ６ 印字ヘッド １０ 媒体 ｔ 印字高さ ａ 穴[Explanation of reference symbols] 1 thickness detection unit 2 axis 3 platen 4 drive source 5 transport guide 6 print head 10 medium t print height a hole
Claims (2)
部と、自在回転軸上に規則的に配置した複数個の偏心ロ
ーラで構成するプラテンと、前記厚さ検出部で測定した
前記媒体厚に応じ印字ヘッドと前記プラテンとの間隙を
前記プラテンを回転させるときの偏心量を利用して調整
する駆動源とを備えることを特徴とするプリンタ印字機
構。1. A thickness detecting section for measuring the medium thickness during medium conveyance, a platen composed of a plurality of eccentric rollers arranged regularly on a freely rotating shaft, and the thickness measuring section for measuring the medium thickness. A printer printing mechanism, comprising: a drive source that adjusts a gap between a print head and the platen according to a medium thickness by using an eccentric amount when the platen is rotated.
る搬送ガイドを備えることを特徴とする請求項１記載の
プリンタ印字機構。2. The printer printing mechanism according to claim 1, further comprising a conveyance guide having a plurality of holes for allowing the platen to escape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29282694A JPH08150761A (en) | 1994-11-28 | 1994-11-28 | Mechanism for printing in printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29282694A JPH08150761A (en) | 1994-11-28 | 1994-11-28 | Mechanism for printing in printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08150761A true JPH08150761A (en) | 1996-06-11 |
Family
ID=17786853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29282694A Pending JPH08150761A (en) | 1994-11-28 | 1994-11-28 | Mechanism for printing in printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08150761A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020168825A (en) * | 2019-04-05 | 2020-10-15 | 沖電気工業株式会社 | Printing device, and automatic teller device with use of printing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54120014A (en) * | 1978-03-09 | 1979-09-18 | Nippon Signal Co Ltd | Dot printer |
| JPS61121972A (en) * | 1984-11-19 | 1986-06-09 | Canon Inc | Platen structure |
| JPS6285972A (en) * | 1985-10-09 | 1987-04-20 | Ricoh Co Ltd | Printer |
-
1994
- 1994-11-28 JP JP29282694A patent/JPH08150761A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54120014A (en) * | 1978-03-09 | 1979-09-18 | Nippon Signal Co Ltd | Dot printer |
| JPS61121972A (en) * | 1984-11-19 | 1986-06-09 | Canon Inc | Platen structure |
| JPS6285972A (en) * | 1985-10-09 | 1987-04-20 | Ricoh Co Ltd | Printer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020168825A (en) * | 2019-04-05 | 2020-10-15 | 沖電気工業株式会社 | Printing device, and automatic teller device with use of printing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19970930 |