JPS62236785A - Ribbon cutting detection mechanism in current supply transfer type printer - Google Patents

Abstract

PURPOSE:To make it possible to detect the cutting of a ribbon over the entire length of the ribbon, by providing a voltage applying part and a ribbon cutting detection mechanism to both ends of the ribbon of a current supply transfer type printer. CONSTITUTION:Unprinted (printing-over) ribbon voltage applying parts 5, 6 and unprinted (printing-over) ribbon part ribbon cutting detection mechanisms 7, 8 are provided to both ends of a ribbon 1. In a usual state, a current is made to flow to a ground roller 4 from the unprinted (printing-over) ribbon voltage applying parts 5, 6 through both ends of the ribbon 1. However, when the ribbon 1 is cut at an unprinted (printing-over) ribbon part, no current flows to the ground roller 4 and the cutting of the ribbon 1 is detected by the unprinted (printing-over) ribbon part ribbon cutting detection mechanisms 7, 8 to generate ribbon cutting detection signals 9, 10 which are, in turn, collected by a logic part 11 to generate a ribbon cutting detection signal 12. By this method, the cutting of the ribbon 1 is detected over the entire length of the ribbon 1.

Description

【発明の詳細な説明】[Detailed description of the invention]

〔産業上の利用分野〕 本発明に通電転写式プリンタの両端を有するリボンのリ
ボン切れｔ検知する通電転写式プリンタのリボン切れ検
出機構に関する。 〔従来の技術〕 従来の通電転写式プリンタのリボン切れ検出機構は、印
字済リボンに関してのリボンのたるみと９機構によシ一
定時間以上リボンがたるんでいるような状態が検知され
た時にリボン切れと認知していた。 〔発明が解決しようとする問題点〕 上述した従来の通電転写式プリンタのリボン切れ検出機
構ハ、リボンの印字済の部分のみのリボン切れが検知可
能であって、リボンのこれらから印字に使用する部分の
リボン切れ検出は不可能であり、従ってリボン全長にわ
たるリボン切れ検出は不可能であるという欠点がある。 〔問題点を解決するための手段〕 本発明の通電転写式プリンタのリボン切れ検出機構に、
通電転写式のリボンと、このリボンに接しかつ接地され
友グランド用ローラと、前記リボ記リボンを通じて前記
グランド用ローラへのｔｍが流れなくなったことを検知
する一対のリボン切れ検出機構とを含んで構成される。 〔実施例〕 次に本発明について図面を参照して説明する。 第１図は、本発明の一実施例の概略の構成図である。印
字部２の前面を走行する通電転写式プリンタのリボン１
は、通電層を有しており、リボン１の通電層を流れる電
流は、グランド用ローラ４へ流れるように構成されてい
る。リボン１の両端に印字末（済）リボン電圧印加部５
（６）ｉ設け、及び印字末（済）リボン部すボン切れ検
出機構［Ｆ］）を設けておく。 次に本発明の詳細な説明する。通常の状態では印字末（
済）リボン電圧印加部５（６）工りリボン１０両端から
グランド用ローラ４へ電流を流す。しかし、印字末（済
）リボン部でリボン１が切れた場合に於いては電流がグ
ランド用ローラ４へ流れなくなり、印字末（済）リボン
部すボン切れ検出機構７（８１によりリボン切れを検出
し、各リボン切れ検出信号９　（１０）　１に発生しロ
ジック部１１にて両信号９，１０をまとめてリボン切れ
検出信号１２を発生する。このようにリボン１の全長に
わたりリボン切れを検出する。[Industrial Application Field] The present invention relates to a ribbon breakage detection mechanism for a current transfer type printer that detects ribbon breakage t of a ribbon having both ends of the current transfer type printer. [Prior Art] The ribbon breakage detection mechanism of a conventional electric transfer printer detects ribbon breakage when a condition in which the ribbon is slack for a certain period of time or more is detected based on the ribbon slack in the printed ribbon. I recognized that. [Problems to be Solved by the Invention] The ribbon breakage detection mechanism of the above-mentioned conventional electrical transfer printer is capable of detecting ribbon breakage only in printed parts of the ribbon, and uses these parts of the ribbon for printing. The disadvantage is that it is not possible to detect a ribbon break in a section, and therefore it is not possible to detect a ribbon break over the entire length of the ribbon. [Means for solving the problem] The ribbon breakage detection mechanism of the current transfer printer of the present invention includes:
The ribbon includes an energized transfer ribbon, a companion ground roller that is in contact with the ribbon and grounded, and a pair of ribbon breakage detection mechanisms that detect when tm has stopped flowing to the ground roller through the ribbed ribbon. configured. [Example] Next, the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of an embodiment of the present invention. Ribbon 1 of an electric transfer printer running in front of the printing section 2
has a current-carrying layer, and is configured such that the current flowing through the current-carrying layer of the ribbon 1 flows to the grounding roller 4. Ribbon voltage applying section 5 at the end of printing at both ends of ribbon 1
(6) i and a ribbon breakage detection mechanism [F]) at the end of printing (finished). Next, the present invention will be explained in detail. Under normal conditions, the end of printing (
(Completed) Ribbon voltage application section 5 (6) Flows current from both ends of the processed ribbon 10 to the ground roller 4. However, if the ribbon 1 breaks at the end of printing, the current will no longer flow to the grounding roller 4, and the ribbon breakage detection mechanism 7 (81) will detect the ribbon breakage at the end of printing. Then, each ribbon breakage detection signal 9 (10) 1 is generated, and the logic section 11 combines both signals 9 and 10 to generate a ribbon breakage detection signal 12. In this way, ribbon breakage is detected over the entire length of the ribbon 1. .

【発明の効果】 以上説明したように本発明は、通電転写式プリンタのリ
ボンの両端に電圧部加部及びリボン切れ検出機構を設け
ることに工〕、リボン全長にわたりリボン切れを検出す
ることができる効果がある。[Effects of the Invention] As explained above, the present invention is constructed by providing a voltage section and a ribbon breakage detection mechanism at both ends of the ribbon of an electric transfer printer, and can detect ribbon breakage over the entire length of the ribbon. effective.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例の概略の構成図である。 １・・・・・・通電転写式プリンタ用リボン、２・・・
・・・通電転写式プリンタ印字部、３・・・・・・リボ
ンガイドローラ、４・・・・・・グランド用ローラ、５
・・・・・・印字末リボン電圧印加部、６・・・・・・
印字済すボン雷圧印加部、７・・・・・・印字床リボン
部リボン切れ検出機構、８・・−・・印字源リボン部リ
ボン切れ検出機構、９・・・・・・印字床リボン部リボ
ン切れ検出信号、１０・・・・・・印字源リボン部リボ
ン切れ検出信号、１１・・・・・・ロジック部、１２・
・・・・・リボン切れ検出信号。 ７・−一さFIG. 1 is a schematic diagram of an embodiment of the present invention. 1... Ribbon for electrical transfer printers, 2...
... Electric transfer printer printing section, 3 ... Ribbon guide roller, 4 ... Ground roller, 5
...Print end ribbon voltage application section, 6...
Bon lightning pressure applying section for printing, 7...Printing floor ribbon section ribbon breakage detection mechanism, 8...Printing source ribbon section ribbon breakage detection mechanism, 9...Printing floor ribbon section ribbon breakage detection signal, 10... Print source ribbon section ribbon breakage detection signal, 11... logic section, 12.
...Ribbon breakage detection signal. 7.-one

Claims (1)

【特許請求の範囲】[Claims] 通電転写式のリボンと、このリボンに接しかつ接地され
たグランド用ローラと、前記リボンの両端それぞれに電
圧を印加する一対の電圧印加部と、この一対の電圧印加
部それぞれについて前記リボンを通じて前記グランド用
ローラへの電流が流れなくなったことを検出する一対の
リボン切れ検出機構とを含むことを特徴とする通電転写
式プリンタのリボン切れ検出機構。A conductive transfer type ribbon, a grounding roller that is in contact with the ribbon and grounded, a pair of voltage application sections that apply a voltage to each end of the ribbon, and a ground roller that applies a voltage to each end of the ribbon through the ribbon for each of the pair of voltage application sections. A ribbon breakage detection mechanism for an electrical transfer printer, comprising a pair of ribbon breakage detection mechanisms that detect when current stops flowing to the transfer roller.