JPH02279374A - Printer - Google Patents

Abstract

PURPOSE:To prevent the printing to a paper absent part by mounting a memory storing the printing data of one page and the sensors detecting the presence of paper provided on both sides of a printing head. CONSTITUTION:A memory part 1 storing the printing data of one page and a sensors 4 detecting the presence of paper provided on both sides of a printing head are mounted. When it is judged that printing is applied to paper so as to exceed the same on the basis of the printing start position and printing completion position calculated from the printing data 110 stored in the memory part 1 and the paper start position and paper completion position detected by the sensors 4, printing is stopped to emit an alarm. By this method, printing is not applied so as to protrude from paper and a printing head is prevented from abrasion and the wastefulness of the paper is eliminated and the paper can be set without paying attention to the position of the paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer device, and particularly to a printer device that can detect the presence or absence of printing paper.

[Conventional technology]

Conventionally, this type of printer device only automatically checked the presence or absence of paper and notified that there was no paper by illuminating the issuing diode, which was sent from an information processing device such as a personal computer or word processor. Data was being printed regardless of the position or size of the loaded paper.

[Problem to be solved by the invention]

The above-mentioned conventional printer devices print regardless of the paper position, so they print on areas that extend beyond the paper and there is no paper, wasting the paper, wearing out the print head, and causing the paper to not reach the print head. It may get caught in the surrounding areas and put a strain on the print head, drive motor, etc., causing trouble.

In addition, in order to reliably print data sent from a computer or word processor on paper that has been loaded and positioned in a conventional printer, the operator must be careful about the starting position and size of the paper. The disadvantage is that the paper must be set.

[Means to solve the problem]

The present invention provides a printer device that prints print data sent from an information processing device onto paper while moving a print head, which includes a memory section that stores one page of the print data, and a memory section that is installed on both sides of the print head. and a sensor that detects the presence or absence of paper, and detects whether the paper is overflowing based on the print start position and print end position calculated from the print data stored in the memory unit and the paper start position and paper end position detected by the sensor. When it is determined that printing is to be performed, printing is stopped and an alarm is issued.

〔Example〕

Next, the present invention will be explained using figures.

FIG. 1 and FIG. 2 are a block diagram and a flow chart showing the operation of an embodiment of the present invention, respectively.

In FIG. 1, data for one page of print data 110 sent from a personal computer, word processor, etc. is stored in the internal memory section 1 of the printer device (step Sl in FIG. 2).
. Next, a paper feed control signal 111 is sent to the paper feed section 2 to feed the paper (page break for continuous paper, paper feed for cut sheets) (step S7).

At the same time, one-page sentence data 11 was stored in memory unit 1.
2 into the calculation unit 3, and 1 in that one page of data.
Step S2) calculates the printing start position (printing position on the leftmost side) and printing end position (printing position on the rightmost side) of the line. Therefore, the start/end position control signal 113 is sent to the detection unit 4 to drive the print head motor, and the calculation unit 3
Move the print head to the position corresponding to the print start position and print end position calculated in , and check whether the sensors on both sides of the print head check whether there is paper or not, and whether the print start position and print end position described above are on the paper. (Steps 83 to S5)
. Thereby, it is checked whether the print data 110 satisfies the set paper. The method for detecting the presence or absence of paper is as follows:
Sensors on both sides of the print head emit light toward the platen, and if there is paper, the light is reflected by the paper, and the sensor detects the presence/absence and position of paper by receiving the reflected light.

If paper exists, a print start control signal 118 is sent to the printing unit 7, thereby starting printing of one page of data 112 (step S6). As soon as one page of data 112 is printed, the next page's data is input into the memory section 1, and the above-described operation is repeated until all the print data is used up. (Step S11>.

In addition, if the paper runs out or the print end position of one page of data exceeds the paper size, the detection unit 4 sends an error control signal 114 to the alarm unit 5, and the alarm unit 5 sends a reset control signal. 115 is sent to the resetting unit 6 to issue an alarm to prompt paper resetting. When the setting is completed, by pressing the set completion button, the resetting unit 6 sends a re-paper feed control signal 116 to the paper feeding unit 2 to feed the paper. (steps 88-510). Therefore, in order to check the paper again, a re-detection control signal 117 is sent to the detection section 4, the paper is checked again, and if there is no paper, an alarm is issued again.

FIGS. 3 and 4 are a block diagram and a flowchart showing the operation of another embodiment of the present invention, respectively.

In FIG. 3, the printing paper size is input from the size input section 8, and the paper size 120 is passed to the printing position conversion section 6 (step P11 shown in FIG. 4). One page of print data 110 sent from a personal computer, word processor, etc. is stored in the internal memory section 1 of the printer device (step PL). Then, a paper feed control signal 11 is sent to the paper feed unit 2.
1 to feed the paper (if it is continuous paper, feed the paper if it is a page break cut sheet), and at the same time output the paper position detection signal 1.
21 is sent to the detection unit 9 to drive the motor of the print head, and the sensors on both sides of the print head check the presence or absence of paper and the paper start position and paper end position from the range of paper on the platen (steps P2 to P4). ) Then print data 1
10 is satisfied with the set paper in the printing range. The method of detecting the presence or absence of paper is to emit light from sensors on both sides of the print head toward the platen, and if there is paper, the light is reflected by the paper, and the sensor receives the reflected light to detect the presence or absence of paper.・Detect position.

Next, the paper start position signal 122 detected by the detection unit 9 is passed to the print position conversion unit 10, and an increase/decrease in the paper start position from the print start position calculated from the print data 112 stored in the memory unit 1 is calculated. As a result, the printing positions of one page's worth of data 112 are automatically rearranged, printing position data]]9 that matches the paper position is created and printed in the printing section 7.Steps P5 and P6) At the same time as printing data is finished, data for the next page is input, and the above-described operation is repeated until all print data is exhausted (step P12).

When there is no paper or when an attempt is made to print beyond the paper position, the detection section 9 sends an error control signal 114 to the alarm section 5.
The alarm unit 5 sends a resetting control signal 115 to the resetting unit to issue an alarm to prompt paper resetting and size setting, and when the setting is completed, pressing the set completion button causes the resetting unit 6 to refeed the paper. The control signal 116 is sent to the paper feeding unit 2 to start paper feeding (steps P7 to P9), and then,
Re-detection control signal 117 to check the paper again
is sent to the detection unit 9, the paper is checked again, and if there is no paper, an alarm is issued again.

By doing so, it is possible to prevent the print head from being worn out without printing protruding from the paper, to eliminate waste of paper, and to set the paper position without worrying about it.

〔Effect of the invention〕

As explained above, the present invention includes a memory that stores print data for one page and a sensor that detects the presence or absence of paper on both sides of the print head, and determines whether or not printing will exceed the paper. This has the effect of eliminating paper wastage by preventing printing on areas where there is no paper, and by preventing paper from getting caught around the print head due to incorrect paper position.

[Brief explanation of drawings]

1 and 2 are a block diagram and a flowchart, respectively, of one embodiment of the invention, and FIGS. 3 and 4 are a block diagram and a flowchart, respectively, of another embodiment of the invention. 1... Memory section 5. 2... Paper feeding section, 3... Calculating section, 4... Detecting section, 5... Alarm section, 6... Resetting section, 7... Printing section , 8... size input section, 9...
- Detection unit, 10... Print position conversion unit, 110... Print data, 111... Paper feed control signal, 112...
Data for one page, 113... Start/end position control signal, 114... Error control signal, 115... Reset control signal, 116... Re-feed control signal, 117...
Redetection control signal, 118...Printing start control signal.

Claims (1)

[Claims] In a printer device that prints print data sent from an information processing device onto paper while moving the print head,
It includes a memory unit that stores one page of the print data, and sensors installed on both sides of the print head to detect the presence or absence of paper, and a print start position and print calculated from the print data stored in the memory unit. The printer device is characterized in that it stops printing and issues an alarm when it is determined that printing will exceed the paper based on the end position and the paper start position and paper end position detected by the sensor.