JPS58145478A - Paper feed controller for printer - Google Patents

Abstract

PURPOSE:To enable to save the labor of manually positioning a paper, by a method wherein a broken line indicating the boundary between pages is printed on a rolled paper fitted in a printer, and the paper is stopped when it is fed until the borken line coincides with a cutting position of a paper cutter. CONSTITUTION:A CPU10 controls a line feed motor driver 28 to drive a line feed motor (f), whereby a platen 7 is rotated to line-feed the rolled paper 3. Simultaneously, a line counter provided in a RAM12 is advanced by an increment. The number N of lines to be printed in one page is preset on the line counter, and when the counted number is changed from ''1'' to ''0'', the CPU10 causes the broken line H to be printed on the paper 3. Thereafter, a correction value (n) is read from a ROM11, and line feeding is conducted (n) times so that the broken line H printed on the paper 3 coincides with the cutting position C of the paper cutter 2, followed by stopping the paper 3.

Description

[Detailed description of the invention] The present invention relates to a paper feed 9 control device for a printer.

For example, some line-type thermal printers that use roll paper have dashed lines (
Some have the function of printing perforations).

By the way, in conventional thermal printers with such a function, when a page break command is input, the roll paper stops when the printing position coincides with the first line near the broken line printing position that is the page boundary. Therefore, the above-mentioned broken line and the cutting position of the manual vapor cutter are misaligned.

Therefore, when cutting out a printed page, it is necessary to manually feed the roll paper until the broken line indicating the page boundary reaches the above-mentioned cutting position.

Also, when printing on the first page of the roll paper that remains after cutting and removing the printed page, do not return the roll paper so that the first line of the first page matches the printing position. Then, the amount of paper that is not returned becomes blank space, which is a waste of paper.

This invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a printer having the above-mentioned functions, so that when a page break command is input, the broken line printed on the roll paper comes to the cutting position of the paper cutter. In addition, it is possible to provide a paper feed control device for a printer capable of controlling paper feed so that the first line of the page is at the printing position at the first printing after a page break command is input. It is intended to solve problems.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an external view of a line type thermal printer for roll paper, which incorporates a printer paper feed control device according to the present invention.

This thermal printer 1 is a desktop type as shown in the figure, and has a line scanning type printing power type and a dot printer 1.
It uses a Rikusu-type character system.

Roll paper, which is heat-sensitive recording paper, is stored under the dust cover 1a, and the printed paper 6a is inserted through the lower opening of the manual paper cutter (hereinafter referred to as the "cutter") 2 as shown in the figure. They will be sent out.

In addition, the operation parts (not shown) of this thermal printer include a power switch, a vapor foot switch, an online/offline switch, a line feed pitch select switch, a character pitch select switch, a self-test switch, and a head release lever.

A power lamp, online lamp, paper empty lamp, etc. are arranged.

FIG. 2 is a schematic diagram showing the structure of the paper feeding system of the thermal printer 1 shown in FIG.

In the figure, the roll paper 6 is inserted into a paper tube shaft (not shown), and the roll receivers 4 attached to both ends of the paper tube shaft are attached to the roll paper center part 5. It is set.

After feeding the leading edge of the roll paper 3 along the paper guide 6.6 to between the platen 7 and the pinch roller 8, the thermal head 9 is moved from the platen 7 by operating the above-mentioned navel release lever. After separating, press the paper feed switch and continue feeding the roll paper 6 until the line feed motor that rotationally drives the platen 7 rotates and the first line near the tip of the roll paper O coincides with the printing position. .

FIG. 3 is a block diagram showing an example of the configuration of the control system of the thermal printer 1.

In the same figure, a microcomputer control unit consisting of a CPU 10, a ROM 11, a RAM 12, etc., when the above-mentioned online switch is on, processes the created document information and format from the master/stem received at the input cover sofa 16. Performs processing based on information, control information, etc.

Note that the CPU 10 of this microcomputer control unit has a first command recognition means that recognizes whether a page break command has been input or not, and whether a first print command has been input after the page break command has been input, as will be described later. It also serves as a second command recognition means for recognizing whether or not the command is issued.

Also, part of the working area of the RAM 12 is an area (-) where the number of lines within a page is counted by software.
Use it as a counter.

Furthermore, in addition to the printer control program, ROkill also includes - number of lives - y' - yN (there are multiple types depending on the type of line feed pitch), and the border of the page of roll paper O when executing a page break command. A correction value take n for moving the printed broken line to the cut position of the cutter 2 is stored.

The character generator 14 has a dot matrix whose size corresponds to the character pitch, and inputs data from the RAM 12 to the character counter 15 and the multiplexer 16.
It plays the role of converting one line of character data stored in AM 17 into don't data.

Note that the latch 18 is for storing character spacing data and line spacing data, end data, and start data. Dot counter 20°AND circuit 21. The buffer 22 generates a clock signal according to the character data, and sends the clock signal to the thermal head recording section 26.
This signal is intended to be input to the head CK terminal in the thermal head 9.

The parallel data from the character generator 14 is
After being converted into serial data by the shift register 23,
OR circuit 2 which uses underline data (with or without it) from buffer RAM 17 as an external input
4 and the buffer RAM 17, the data is input to the head DI terminal of the thermal recording section 26 via the bold printing circuit 25, which operates only when bold data is input from the buffer RAM 17.

The read motor driver 28 drives the line feed motor of the thermal recording section in accordance with the excitation data sent to the lunch 27.

In addition, this lunch 27. Line feed motor driver 28. and CPU 10 of the microcomputer control section.
, ROM 11, RAM 12, etc. constitute a sending and reverse sending control means.

Next, functions related to the present invention will be explained with reference to the drawings from FIG. 4 onwards.

When the CPU 10 shown in FIG. 6 recognizes that a page break command has been received in the input buffer 16, the subroutine shown in FIG. 4 is called and executed.

That is, the CPU 10 controls the line feed motor driver 28 to drive the line feed motor to rotate the platen 7, thereby rotating the roll paper 6.
line feed.

Then, while performing this line feed, RAM1
The line counter in 2 is incremented.

This line counter is an N-ary counter based on the line number data N for one page read from the ROM 11 in accordance with the line feed pitch currently being executed.

Therefore, the count value of this line counter is N-1
When the line changes from
1247 pieces of broken line data consisting of alternating minus code and space code data as shown in FIG.

When the broken line printing is completed, the CPU 10 reads the correction value n from the ROM 11, performs line feed for n times of this correction value, and as shown in FIG. After matching position C and stopping, the main routine of the printer control program is returned.

In this way, the printed page can be cut off from the printed paper 6a without aligning the page boundary with the cut position C of the cutter 2.

Next, when the CPU 10 recognizes that a print command has been received in the input buffer 16, it first determines whether or not the print command is the first print command after the page break command is input, as shown in the flowchart of FIG. do.

Then, when the print command is recognized as the first print command after inputting the page break command, the CPU 10 reads the ROM 11
After reading out the horizontal correction value n, performing backline feed for n times of this correction value, and cutting out the printed page as shown in Figure 8, the first line of the first page of roll paper O is Align the print position ■ of the print head 9 with the print position ■ of the thermal head 9, and if the page on which printing has been completed is not cut out, match the top line of the next page with the print position ■ of the thermal head 9, and then stop. .

Then, line printing is executed based on the above-mentioned printing command.

Of course, if the above print command is not the first print command after a page break is input, line printing is directly performed based on the print command without performing the bank line feed as described above.

In the above embodiment, the present invention was applied to a thermal printer, but the present invention can be similarly applied to any printer that uses roll paper.

As explained above, according to the present invention, when a page break command is input, the broken line printed on the roll paper is always at the cutting position of the paper cutter, so it is possible to immediately cut out the printed page. can.

Furthermore, when the first print command after a page break is input, the leading line of the page and the print position match, so that no paper is wasted as in the conventional case.

[Brief explanation of drawings]

FIG. 1 is an external view of a line type thermal printer for roll paper, which incorporates a printer paper feed control device according to the present invention. 2 is a schematic diagram showing the structure of the paper feeding system of the thermal printer shown in FIG. 1, FIG. 6 is a block diagram showing an example of the structure of the control system of the thermal printer shown in FIG. 1, and FIG. FIG. 6 is a flow diagram of a subroutine program according to the present invention executed by the CPU, FIG. 5 is a data format diagram of broken line data, and FIG. 6 is an explanatory diagram showing the feeding state of roll paper during page break command processing. , FIG. 7 is a flow diagram of a program according to the present invention executed by the CPU of FIG. 3, and FIG. 8 is an explanation showing the paper feeding state of the roll paper at the time of processing the first printing command after processing the page break command. It is a diagram. 1...Thermal printer 2...Manual paper cutter 6...Roll paper 6
a...Paper of printing method 7...Platen 9...Thermal head

Claims (1)

[Claims] 1. In a printer using roll paper having a function of printing broken lines at page boundaries according to a specified paper size, a first command recognition means for recognizing whether or not a page break command has been input; When the command recognition means recognizes the input of a page break command, the broken line printed on the roll paper and the cut of the paper cutter [place,! : feeding control means for feeding out the roll paper until the numbers match; a second command recognition means for recognizing whether or not a first print command has been input after a page break command has been input; and reverse feed control means for feeding the roll paper backwards until the leading line of the page coincides with the printing position when the means recognizes the input of the first printing command. 9
Control device.