JPH04355174A - Printing position correction device in printer - Google Patents

Abstract

PURPOSE:To automatically correct a shift of a printing position in a line feed direction and in a sliding direction of a printing mechanism without a manual operation, such as the use of a dip switch, in a passbook printer or the like used in a financial terminal equipment. CONSTITUTION:A printer is provided with a printing mechanism 1, a feed mechanism 3, an image sensor 5, and a control part 10 controlling a printing operation by feeding back the result identified by the image sensor 5. If a printing position on paper 6 identified by the image sensor 5 is deviated from a specified printing position, the control part 10 controls the printing mechanism 1 and the feed mechanism 3 to ensure a printing on the specified printing position.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an automatic correction device for printing position deviations in passbook printers used in financial terminals, and more particularly, to a printer printing system that automatically corrects printing position deviations in the line feed direction and the sliding direction of the printing mechanism. The present invention relates to a positional deviation correction device.

0002

[Prior Art] In conventional printers, the printing result is determined by the printing position deviation in the line feed direction or the printing position deviation in the sliding direction of the printing mechanism caused by the relative positional deviation between the printing mechanism and the paper sheet due to assembly error. was measured, and the correction value for the printing position deviation was fed back by changing the dip switch to correct the printing position deviation in each direction.

In addition, in conventional serial printers, the above-mentioned printing position deviation in the sliding direction also occurs due to backlash of the reciprocating mechanism when reciprocating printing is performed, and in this case, the printing position also The results were measured, and the reciprocal printing position shift was corrected in the same way as above.

0004

[Problem to be Solved by the Invention] However, in this conventional printer, a person measures the printing result and adjusts the correction value for the printing position shift by changing the dip switch, so the adjustment is labor-intensive. In addition, there was a problem that adjustment took time.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a printing position correction device for a printer that can adjust printing position deviation without manual intervention.

[0006]

[Means for Solving the Problems] In order to achieve the above object, a printing position correction device for a printer according to the present invention includes a printing mechanism for printing on paper sheets, and a conveyance mechanism for transporting the paper sheets to be printed. and an image sensor that can identify the printing position of the characters printed on the paper sheet, and when there is a deviation between the printing position of the printed character identified by the image sensor and the specified printing position, the specified printing position. The configuration includes a control unit that controls printing so that printing can be performed.

[0007] If necessary, the image sensor has a function of identifying the printing position of the characters printed on the paper sheet in the line feed direction with respect to the paper sheet. The present invention is configured to include an initial conveyance position changing function for changing the initial conveyance position of the paper sheet relative to the printing mechanism when there is a printing position shift in the line feed direction.

[0008] Furthermore, if necessary, the image sensor has a function of identifying the printing position of the characters printed on the paper sheet in the sliding direction of the printing mechanism with respect to the paper sheet. The present invention is configured to include a print start position changing function that changes the print start position of the printing mechanism when there is a print position shift in the sliding direction in the print position identified by the sensor.

[0009]

[Operation] According to the printing position correction device for a printer having the above structure, the image sensor identifies the printing position of characters printed on a paper sheet. If the identification result indicates a printing position shift, the control unit controls the printing mechanism and the conveyance mechanism to perform printing control so that printing can be performed at a prescribed printing position.

0010

Embodiments Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a print position correction device for a printer according to an embodiment of the present invention.

In the figure, 1 is a printing mechanism, 3 is a transport mechanism, 5 is an image sensor, and 10 is a control section. The conveyance mechanism 3 includes a conveyance roller 4, and the conveyance roller 4 conveys the paper sheet 6 in the direction B in FIG.

A printing mechanism 1 is provided on this conveyance mechanism 3. This printing mechanism 1 includes a printing head 2 that reciprocates in the direction A in the figure.
By sliding the print head 2, arbitrary characters can be printed on the paper sheet 6.

An image sensor 5 is also arranged above the conveyance path 3, and can identify characters printed on paper sheets 6. That is, the image sensor 5 has a function of identifying the printing position of characters printed on the paper sheet 6 in the line feed direction and the printing position in the sliding direction of the print head 2 with respect to the paper sheet.

The control section 10 controls printing so that when there is a deviation between the printing position of the printed character identified by the image sensor 5 and the specified printing position, the character can be printed at the specified printing position. That is, the control unit 10 controls the image sensor 5
It is equipped with an initial conveyance position changing function that controls the conveyance mechanism 3 to change the initial conveyance position of the paper sheet 6 relative to the printing mechanism 1 when there is a print position deviation in the line feed direction in the print position identified by the printer. , is provided with a printing start position changing function for changing the printing start position of the printing mechanism 1 when there is a printing position shift in the sliding direction identified by the image sensor 5.

Next, the operation of the printer print position correction device according to the embodiment will be explained. The paper sheet 6 is transported directly below the printing mechanism 1 by the transport mechanism 3, and horizontal line printing is performed by the print head 2 of the printing mechanism 1.

In this case, as shown in FIG. 2, there is a line feed direction between the printing position 7 according to the original standard and the printed character 8 when the paper sheet 6 is transported by the transport mechanism 3 and printed by the printing mechanism 1. When a printing position shift x occurs, the following effects occur.

That is, by passing the paper sheet 6 through the image sensor 5 by the conveyance mechanism 3 and recognizing the position of the printed character 8 printed on the paper sheet 6, the deviation from the printing position 7 according to the known standard is detected. Recognize x.

Once this deviation x is recognized, the initial conveyance position changing function of the control unit 10 allows the paper sheet 6 to be conveyed directly below the printing mechanism 1 by the conveyance mechanism 3 to correct the deviation The paper sheets 6 are shifted and conveyed by . Therefore, when an arbitrary character is printed by the printing mechanism 1, there is no misalignment between the standard printing position 7 and the printed character 8, as shown in FIG.

Furthermore, as shown in FIG. 4, there is a printing position deviation x in the sliding direction between the printing position 7 according to the original standard and the printed character 8 when the print head 2 slides to print. When it occurs, it acts as follows.

That is, by passing the paper sheet 6 through the image sensor 5 by the conveyance mechanism 3 and recognizing the position of the printed character 8 printed on the paper sheet 6, the deviation from the printing position 7 according to the known standard is detected. Recognize x.

When this deviation x is recognized, the printing start position changing function of the control unit 10 allows the print head 2 to slide and print any character by the amount of deviation x when printing from the next time. is printed, and as shown in FIG. 5, there is no misalignment between the standard printing position 7 and the printed character 8.

Further, as shown in FIG. 6, in the reciprocating printing of the print head 2, the C direction printed character 7 when the print head 2 slides in the C direction in FIG. 6 and the print head 2 When a deviation x occurs between the character 8 printed by sliding in the D direction in FIG. 6 and the character 8 printed in the D direction, the following actions occur.

That is, the paper sheet 6 is passed through the image sensor 5 by the conveyance mechanism 3, and the image sensor 5 distinguishes between the C direction printed character 7 and the D direction printed character 8 printed on the paper sheet 6. Recognize x.

If this deviation x is recognized, the printing start position changing function of the control unit 10 will cause the print head 2 to slide in the D direction and print by the amount of deviation x when printing from the next time. Any character is printed, and as shown in FIG. 7, there is no misalignment between the C direction printed character 7 and the D direction printed character 8.

[0025] After the above automatic correction is performed once in the adjustment stage, there is no need to perform automatic correction. After this, printing can be performed without deviation from the standard printing position 7.

As explained above, according to the printer print position correction device of the present invention, it is possible to identify print position deviations using an image sensor and print by feeding back the deviations, so that correction can be automated. This method has the effect that printing position deviations can be adjusted in a short time without the trouble of manually measuring the deviations.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a print position correction device for a printer according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram when printing is performed without correcting deviation in the line feed direction.

FIG. 3 is an explanatory diagram when a shift in the line feed direction is corrected.

FIG. 4 is an explanatory diagram when printing is performed without correcting deviation in the sliding direction.

FIG. 5 is an explanatory diagram when the deviation in the sliding direction is corrected.

FIG. 6 is an explanatory diagram when printing is performed without correcting the deviation in the sliding direction in reciprocating printing.

FIG. 7 is an explanatory diagram when correcting a shift in the sliding direction in reciprocating printing.

[Explanation of symbols]

1 Printing mechanism 2 Print head 3 Conveyance mechanism 4 Conveyance roller 5 Image sensor 6 Paper leaves 7 Standard printing position 8 Printed characters 10 Control section A, C, D　Sliding direction B Conveying direction x Printing position shift

Claims (3)

[Claims] Claim 1: A printing mechanism for printing on paper sheets, a transport mechanism for transporting the paper sheets to be printed, and a printing position of characters printed on the paper sheets with respect to the paper sheets. Printing of a printer characterized by comprising an image sensor and a control unit that controls printing so that printing can be performed at a specified printing position when there is a discrepancy between the printing position of a printed character identified by the image sensor and a specified printing position. Position correction device. 2. The image sensor has a function of identifying the printing position of the characters printed on the paper sheet in the line feed direction with respect to the paper sheet, and the control unit detects the line break at the printing position identified by the image sensor. 2. The printing position correction device for a printer according to claim 1, further comprising an initial conveyance position changing function for changing the initial conveyance position of the paper sheet with respect to the printing mechanism when there is a directional print position deviation. 3. The image sensor has a function of identifying the printing position of the characters printed on the paper sheet in the sliding direction of the printing mechanism with respect to the paper sheet, and the control unit is configured to identify the printing position of the characters printed on the paper sheet in the sliding direction of the printing mechanism. 2. The printing position correction device for a printer according to claim 1, further comprising a printing start position changing function for changing the printing start position of said printing mechanism when there is a printing position deviation in a sliding direction.