JPH0550676A - Sheet feed mechanism of serial printer - Google Patents

Abstract

PURPOSE:To feed continuous printing sheets simultaneously after completion of printing a single line and reduce a printing time or the frequency of replacing a printing sheet by driving a sheet feed motor and pairs of sprocket mechanisms on a single shaft through a means for transmitting a drive force. CONSTITUTION:The first continuous printing sheet is loaded on each sprocket wheel 1, 2 and the second continuous printing sheet is loaded on separate sprocket wheels 4, 5. Then a head 6 is moved in the line direction of the printing sheet using a carriage motor 7 to allow data to be printed on the surface of the printing sheet on a platen 15. In addition, if printing data in a single print line is completed, the sprocket wheels 1, 2, 3, 4 are driven through a drive force transmission mechanism 14 using a sheet feed motor 8 to feed the sheet. Thus the continuous printing sheets can be loaded so that so many printing sheets can be printed in a single line printing action and the shortening of a printing time and the reduction of the frequency of replacing a printing sheet are achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing paper feeding mechanism for a serial printer which prints a character or bit image by selectively driving a head composed of an impact wire, an ink jet nozzle or a heating element in response to a print command. ..

[0002]

2. Description of the Related Art Among printers for printing characters or bit images in a dot matrix, serial type printers that use ink jet nozzles, impact wire pins or heating elements as print heads are excellent in cost performance and are therefore widely spread. is doing. In addition to printing single-cut sheets of sizes such as B5, A4, and B4, these printers have a print digit of 80 digits.
It is also possible to print a continuous slip paper of 132 digits or 136 digits. Conventionally, in the case of printing paper such as continuous slip paper which is fed by sprocket pins, as shown in FIG. 3, the number of papers that can be installed in the serial printer by the sprocket wheel pairs 9 and 10 is limited to one. It was

[0003]

However, since it is possible to equip only a single continuous printing paper, in the case of a printing paper having a small number of printable digits in one line, there is a drawback such as low utilization efficiency with respect to the printable number of digits, and slips and slips. In the form issuance process,
When printing a series of data on different types of continuous printing paper, the printing paper must be divided into two sets and set in the serial printer, and the print data must also be divided into two and transferred to the serial printer for printing. There was annoyance in use, such as not becoming.

Therefore, according to the present invention, a plurality of continuous sheets of the same type or different types can be mounted, so that
The purpose is to enable printing on multiple sheets in one printing operation.

[0005]

A paper feeding mechanism of a serial printer according to the present invention drives a single paper feeding electric motor by a paper feeding control signal of a printing paper generated by a control circuit of the serial printer, and drives the electric motor. It is characterized in that a plurality of pairs of sprocket mechanisms mounted coaxially are driven via a transmission means for transmitting a force, and a plurality of continuous printing papers are fed simultaneously after the completion of printing one line.

[0006]

According to the paper feeding mechanism of the serial printer of the present invention, a plurality of continuous printing papers of the same kind or different kinds can be equipped, so that it is possible to print on a plurality of printing papers by one line printing operation, and the printing time can be reduced. In addition to being shortened, the number of times printing paper is replaced is reduced.

[0007]

The present invention will be described below in accordance with one embodiment.

FIG. 1 shows a structural diagram of the mechanism. FIG. 1 shows a paper feeding mechanism when two types of printing paper are installed in a serial printer. The sprocket wheels 1 and 2 are equipped with a first continuous printing paper, and the sprocket wheels 4 and 5 are equipped with a second continuous printing paper. Equipped with continuous printing paper. The head 6 is moved in the row direction of the printing paper by the carriage motor 7, and prints on the printing paper surface on the platen 7. 1
When the printing of the print line is completed, the paper feed motor 8 is driven to drive the sprocket wheel coaxially mounted by the driving force transmission mechanism 14 composed of a gear group to feed the paper. In the embodiment of FIG. 1, a print paper feeding mechanism that pulls and feeds the print paper in the post-printing process is used, but the print paper is pushed in and fed in the pre-printing process. A feed mechanism may be used.

FIG. 2 is a schematic diagram of printing on two types of continuous printing paper by using the paper feeding mechanism of FIG. In the figure, reference numeral 11 denotes a form in which a single-copy sheet is fixed to continuous printing paper, and 12 is a continuous printing copy sheet. The two types of continuous printing papers are printed in different printing formats by printing the head in the row direction once, and the papers are fed at the same time after the printing of one printing row is completed. In the embodiment, the two types of printing have the same paper feed interval, but when the paper feed intervals are different, the paper feed is performed by giving priority to the feed interval having the smaller feed amount. Also,
The printing paper to be installed may of course be of the same printing format.

[0010]

As described above, according to the paper feeding mechanism of the serial printer of the present invention, a plurality of continuous printing papers of the same kind or different kinds can be equipped, so that a single line printing operation can print a plurality of printing papers. Printing is enabled, the printing time is shortened, and the number of times the printing paper is replaced is reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a paper feeding mechanism of a serial printer according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a printing result according to an example of the present invention.

FIG. 3 is a configuration diagram of a paper feeding mechanism of a conventional serial printer.

[Explanation of symbols] 1, 2, 4, 5, 9, 10 Paper feed sprocket 3 Paper guide 6 Head 7 Carriage motor 8 Paper feed motor 11 Continuous printing paper 12 Continuous printing copy paper 13 Single-cut copy paper 14 Transmission mechanism 15 Platen

Claims (1)

[Claims] 1. A serial printer which prints a character or bit image by selectively driving a head composed of an impact wire pin, an ink jet nozzle or a heating element in response to a print command to print a character or bit image. A single paper feed motor is driven by a paper feed control signal for the paper, and a plurality of pairs of sprocket mechanisms mounted coaxially are driven via a transmission means for transmitting the driving force of the electric motor, and a plurality of sprocket mechanisms are simultaneously driven after one line is printed. A paper feed mechanism for serial printers, which performs continuous printing paper feed.