JPH01320180A - Printer - Google Patents

Abstract

PURPOSE:To maintain an initial paper set state and a succeeding printing condition favorably by a method wherein at the time of setting paper on a printing start position a printing head is set by operating an operation panel so that the center of an indicator is made coincident with the center of the paper to be set. CONSTITUTION:When a leading end of paper passes through a printing part by a predetermined amount, a platen 1 and a tractor are brought to a stop, the leading paper end is pressed against the platen 1 by a bail roller, and a paper setting is completed. At this time, a printing head 2 is prepositioned as shown by numerals (1), (2),...(5) by operating an operation panel so that the center of an indicator 3 is opposed to the center in the width direction of the paper to be set, and the paper setting is performed.

Description

[Detailed Description of the Invention] [Summary] Regarding a printer equipped with an indicator that suppresses flapping of paper near the printing section during printing, the initial setting state of the paper and the subsequent In order to maintain a good printing condition, there is a print head that reciprocates in the space direction along the print section and operates at a predetermined time to perform a printing operation, and a print head that is installed near the print head and that In a printer equipped with an indicator that suppresses flapping in the vicinity of the printing section when printing paper sent to the printing section, and an operation panel for operator operation, the paper is moved to the indicator start position by operation on the operation panel. The center of the indicator is set to coincide with the center of the paper to be set when the paper is set.

[Industrial application field]

The present invention relates to a printer equipped with an indicator that suppresses flapping of paper near a printing section during printing.

In recent printers, after placing the paper on the cut guide in the case of cut paper, or after attaching the paper to the tractor in the case of continuous paper, you can press the switch on the operation panel or press the paper against the platen to print the paper. It has become common to have an autoload mechanism that automatically sucks paper and sets it at the printing start position by opening and closing the pail roller to improve the ejection operation.

(Prior art) In conventional autoloading, a detection switch is linked to the opening/closing operation of the pail roller, and when the pail roller is opened, the paper is sucked in, and when the leading edge of the paper has passed the pail roller by a predetermined amount, the pail roller is closed and the paper is removed. Press it against the platen to complete autoloading. At this time, the position of the print head in the space direction (direction along the platen) is always at a constant location, and the position is set approximately at the center between the center and the left end of the printer. Note that the paper is normally set using the left end as a reference.

[Problem to be solved by the invention]

However, with this type of autoloading method, when the paper width is extremely small, the center of the indicator shifts far to the right of the center of the paper, and the left edge of the paper protrudes from the indicator, causing the paper width to be as large as the platen width. When this is the case, the center of the indicator deviates significantly to the right from the center of the paper, resulting in a phenomenon in which the right edge of the paper protrudes from the indicator. As a result, in any of these cases, the paper could not be held down well when the pail roller was closed, and the initial setting state and subsequent printing conditions could not be maintained in good condition.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printer in which the initial setting state of the paper and the subsequent printing state can be maintained well by eliminating uneven contact of the indicator with respect to the set paper.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a print head that reciprocates in the space direction along the printing section and operates at a predetermined time to perform a printing operation, and a print head provided near the print head,
In a printer equipped with an indicator that suppresses flapping in the vicinity of the printing section when printing paper sent to the printing section, and an operation panel for operator operation, the paper is moved to a printing start position by operation on the operation panel. The center of the indicator is set to coincide with the center of the paper to be sent when the paper is set.

[Effect]

Since the center of the indicator is set so that the center of the indicator coincides with the center of the paper being set when the paper is placed at the printing start position, the flapping of the paper being set is suppressed at the center by the indicator. The indicator no longer hits the paper unevenly.

Therefore, the initial setting state of the paper is kept good, and the subsequent printing state is also good.

〔Example〕

The invention will now be described in detail in conjunction with the drawings.

FIG. 2 is a side view showing the main structure of the printer according to the present invention, in which 1 is a platen, 2 is a print head, 3 is an indicator, 4 is a tractor, 5 and 6 are feed rollers, and 7 is a hale roller. It is.

The print head 2 and indicator 3 are mounted on a carrier 8. The carrier 8 contacts a guide rail 11 extending in the space direction via a lever 10 supported by a guide shaft 9 extending in the space direction, and is movable in the space direction within a predetermined range by being driven by a drive system (not shown).

This printer is for continuous and single-function use, and its autoloading is performed by the following procedure.

When using the cut paper 100A, the cut paper 100A is fed as shown by the arrow on the platen 1 which rotates clockwise.
At this time, the feed roller 5.6 plays the role of bringing the sheet into close contact with the platen 1. When the leading edge of the paper passes a predetermined distance through the printing unit 12, the platen 1 is stopped, and the pail roller 7, which had been retracted to the position indicated by the chain line, is moved to the position indicated by the solid line, and the leading edge of the paper is pressed against the platen 1 to the printing start position. The paper setting is completed.

Further, when the continuous paper 100B is used, the continuous paper 100B is fed as shown by the arrow, and is transported by the tractor 4, and then continuously transported by the platen 1. When the leading edge of the paper passes the printing section 12 by a predetermined distance, the platen 1. The tractor 4 is stopped, and the leading edge of the paper is pressed against the platen 1 by the pail roller 7 in the same manner as described above, thereby completing the paper centing.

In the present invention, when setting these sheets of paper, the position of the print head 2 is set so that the center of the indicator 3 faces the widthwise center of the sheet to be centered, and then the paper is centered. The procedure for setting the position of the print head is as shown in Figure 1, where ■, ■, ..., ■ indicate various types of paper with different widths, and the position of the print head 2 at the time of each paper cent is ■, ■. ,..., as shown in ■. Position (3) of the print head 2 corresponds to the home position of a conventional print head. In this conventional case, the left end of the paper marked ■ and the right end of the paper marked ■ become extremely unstable. In contrast, in the case of the present invention, the print head 2, that is, the indicator 3, is positioned at the center of each size of paper, so that the indicator 3 can stably hold the paper at the center for any paper.

This positioning of the print head 2 can be done by moving the print head 2 from the initial position (■) to a desired position to the left or right by operating a switch with a display such as (5) provided on an operation panel (not shown). Try moving it up to that point.

Next, a detailed method for positioning the indicator 3 will be explained with reference to FIGS. 3 and 4.

FIG. 3 is a block diagram showing the configuration of the indicator positioning mechanism, in which 101 is a printer control section;
2 is a printer power control unit, 103 is a host device (host computer), 104 is a left movement instruction switch 104+,
An operation panel equipped with a right movement instruction switch 104□, an autoload instruction switch 1043, etc., 105 is a print control section, 106 is a line feed control section, 107 is a space control section, 10
8 is a print drive unit, 109 is a line feed drive unit, 110 is a space drive unit, 111 is an interface control unit, HD is a print head (corresponding to the print head 2 described above), LFM is a line feed motor, SM is a space motor, CNT is a carrier current value register, TABL is a movement amount storage section, and SW is a power switch.

The positioning operation of the indicator according to the configuration shown in Fig. 3 is explained in Fig. 4.
The following is an explanation using the flowchart shown in the figure.

The power switch SW is pressed ((a)), or a reset signal is input from the host device 103 (RET-“1”,
4=(b)), initial processing is performed. this is,
This is a process (c) for resetting the registers of each part and moving the space motor SM from the left end to the right by S:l. Therefore, when the initial processing (c) is completed, the carrier (print head) is located at the centering home position (the position marked with ■ in FIG. 1).

Next, the printer control unit 101
4. , 104□, 104. Pressing of the + button is monitored, and when the switch 1041 is pressed, the carrier is moved by 81 to the left by the space motor SM ((d)). The amount of S, , is obtained by referring to the movement amount storage unit TABL based on the contents of the carrier current position register CNT.

When the switch 104□ is pressed (e), the space motor SM moves the carrier by 87 points to the right ((e)).

and switch 104. When is pressed ((g))
, the printer control unit 101 is the line feed control unit 106
．． The line feed motor LFM is rotated via the line feed drive unit 109 to transport the paper in the forward direction, and automatic loading of the paper is performed.

The routes for processing (J) and (S) are respectively connected to switch 10.
4. ．． This is when 104□ is pressed down continuously.

By setting the position of the indicator before setting the paper as described above, it is possible to improve the initial setting state of the paper, and also to suppress line break disturbances during subsequent printing to achieve a good printing state. becomes possible.

〔Effect of the invention〕

As described above, according to the present invention, the initial setting state of the paper is maintained by eliminating the uneven contact of the indicator with respect to the paper set at the printing start position, and the line break disturbance etc. during subsequent printing is suppressed. It is possible to achieve a printing condition that is suitable for printing.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an explanatory diagram of the procedure for positioning the print head, Fig. 2 is a side view showing the main structure of the printer, and Fig. 3 is a block diagram showing the structure of the indicator positioning mechanism. 4 are flowcharts showing the positioning operation of the indicator. In the figure, 2. HD is a print head, 3 is an indicator, 7 is a pail roller, 8 is a carrier, 12 is a print section, 104 is an operation panel, 104. ．． 104° and 104ff are switches, and 100A and 100B are paper sheets. Figure 1 Figure 2 Figure 4

Claims (1)

[Claims] A print head (2) that reciprocates in the space direction along the print section (12) and operates at a predetermined time to print, and a print head (2) that is provided near the print head (2) and that prints the print head. Part (1
2) when printing on the paper sent to the printing section (12).
), and an operation panel for operator operation, wherein the indicator (3) is set when the paper is set at the printing start position by the operation on the operation panel. A printer characterized in that the center of the printer is set to match the center of paper to be set.