JPH03116939U

JPH03116939U -

Info

Publication number: JPH03116939U
Application number: JP2611990U
Authority: JP
Priority date: 1990-03-16
Filing date: 1990-03-16
Publication date: 1991-12-03

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す要部斜視図、
第２図はその連続用紙給送時を示す側断面図、第
３図はプラテンの紙送り量制御特性図、第４図は
カツトシート給送時を示す側断面図、第５図は従
来例を示す要部斜視図、第６図はこの従来例の連
続印字媒体給送時を示す側断面図、第７図は従来
例のカツトシート給送時の側断面図である。２１……プラテン、２２……ピントラクタ、２
２ａ……可撓性ベルト、２２ｂ……ピン、２３…
…連続用紙、２４，２５……ピントラクタ、２６
，３０……パルスモータ、２７，２８，２９……
プラテン駆動ギヤ列、３１，３２，３３……ピン
トラクタ駆動ギヤ列、３４……連続用紙終端検出
センサ、３５……印字ヘツド、３６……リボンプ
ロテクタ、３７……ベイルローラ、３８……シー
トガイド、３９……ペーパーシユート、４０ａ，
４０ｂ……ピンチローラ、４１……カツトシート
。 FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention;
Figure 2 is a side sectional view showing continuous paper feeding, Figure 3 is a platen paper feed amount control characteristic diagram, Figure 4 is a side sectional view showing cut sheet feeding, and Figure 5 is a conventional example. 6 is a side sectional view showing the conventional example when continuous printing medium is being fed, and FIG. 7 is a side sectional view showing the conventional example when cut sheets are being fed. 21...Platen, 22...Pin tractor, 2
2a...flexible belt, 22b...pin, 23...
...Continuous paper, 24, 25...Pin tractor, 26
, 30...Pulse motor, 27, 28, 29...
Platen drive gear train, 31, 32, 33... Pin tractor drive gear train, 34... Continuous paper end detection sensor, 35... Print head, 36... Ribbon protector, 37... Bail roller, 38... Sheet guide, 39...paper shoot, 40a,
40b...Pinch roller, 41...Cut sheet.

Claims

[Claims for Utility Model Registration] 1. A continuous printing medium feeding mechanism with a sprocket hole, which is composed of a cylindrical platen and a pin tractor disposed behind the platen, and a pinch roller that comes into contact with and separates from the platen. In a printer equipped with a single sheet printing medium feeding mechanism that grips and feeds a single sheet, a dedicated drive motor is installed in each drive means of the platen and pin tractor, and a media end point is installed on the pin tractor. A paper feeding mechanism for a printer, comprising a detection sensor and a control means for adjusting the paper feeding amount of a platen or a pin tractor in response to each feeding of continuous media and cut media. 2. When the continuous medium is fed in the forward direction, the control means controls each drive means so that the medium feeding amount of the platen is 0.1 to several 10 times larger than that of the pin tractor.
After the media end detection sensor detects the media end, the platen feeding amount is gradually decreased until the media comes off the pin tractor, and after it comes off, the platen feeding amount is the same as the pin tractor feeding amount. 2. The paper feeding mechanism for a printer according to claim 1, wherein the paper feeding mechanism is adapted to adjust the paper feeding mechanism. 3. Claim 1, wherein the control means, when feeding the continuous medium in the reverse direction, controls each drive means so as to adjust the medium feeding amount of the platen to be the same amount or several percent smaller than that of the pin tractor. The paper feed mechanism of the listed printer. 4. The paper feeding mechanism for a printer according to claim 1, wherein the control means controls the drive means to adjust the feed amount of the platen to match the regular feed amount when feeding the cut medium.