JPS60191353U

JPS60191353U - Ink ribbon feeding control device

Info

Publication number: JPS60191353U
Application number: JP7755084U
Authority: JP
Inventors: 渡辺　多美夫; 隆史中村
Original assignee: 日立工機株式会社
Priority date: 1984-05-25
Filing date: 1984-05-25
Publication date: 1985-12-18

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はラインプリンタの機構部の一例を示す斜視図、
第２図は従来のインクリボンの制御方法を示すタイムチ
ャート、第３図は従来のリボン制御方法における不具合
を示すタイムチャート、第　。４図は従来のインクリボンの送行制御装置の回路図、第
５図は第４図の回路の動作を示すタイムチャート、第６
図は本考案によるインクリボンの送行制御装置の回路図
、第７図は第６図の回路の動作を示すタイムチャートで
ある。図においては、１は活字搬送体、２は印刷用紙、３はイ
ンクリボン、４はハンマ、５はインクリボンロール、６
はモータ、７は動力伝達機構、８．１１はカウンタ、９
，１９，２０はオアゲート、１０はＳＲフリップフロッ
プ、１２はデータセレクタ、１３はラッチ回路、１４は
比較回路、１５はゲート群、１６．１７はインバータ、
１８．２１，２４はアンドゲート、２２はシングルショ
ット、２３はＪＫフリップフロップである。FIG. 1 is a perspective view showing an example of a mechanical part of a line printer;
FIG. 2 is a time chart showing a conventional ink ribbon control method, and FIG. 3 is a time chart showing problems in the conventional ribbon control method. Figure 4 is a circuit diagram of a conventional ink ribbon feeding control device, Figure 5 is a time chart showing the operation of the circuit in Figure 4, and Figure 6 is a circuit diagram of a conventional ink ribbon feeding control device.
The figure is a circuit diagram of an ink ribbon feeding control device according to the present invention, and FIG. 7 is a time chart showing the operation of the circuit of FIG. 6. In the figure, 1 is a type conveyor, 2 is a printing paper, 3 is an ink ribbon, 4 is a hammer, 5 is an ink ribbon roll, 6
is a motor, 7 is a power transmission mechanism, 8.11 is a counter, 9
, 19, 20 are OR gates, 10 is an SR flip-flop, 12 is a data selector, 13 is a latch circuit, 14 is a comparison circuit, 15 is a gate group, 16.17 is an inverter,
18. 21 and 24 are AND gates, 22 is a single shot, and 23 is a JK flip-flop.

Claims

[Scope of utility model registration request]

A power transmission mechanism that has a printing surface where a type conveyor, an ink ribbon, paper, and a hammer face each other, has a motor as a power source for feeding the ink ribbon, and switches between transmitting and non-transmitting the torque of the motor. In the ribbon feeding mechanism of a line printer, a minimum value τ1 is set in advance as the ink ribbon feeding time when the type conveyor and motor are rotating, and the time T1 is set in advance as the ink ribbon feeding time when printing or paper feeding data is transferred. data transfer cycle T until the next print or paper feed data is transferred.
2, and if the relationship T2>T1 holds during the next data transfer, the value of T1 is T2 + α (α is T2 - T□
An arbitrary value of degree. ), time T2+
The ink ribbon is fed for a period of α, and if the relationship T2 < T1 holds true, the ink ribbon is fed for a time T□ to automatically extend the ink ribbon feeding time, and then the data is transferred. An ink ribbon feeding control device which controls a power transmission mechanism so as to return the ink ribbon feeding time to T□ when the station 1° exceeds the maximum [3].