JP2001293920A - Print position correcting mechanism in medium processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a printer for printing on a booklet medium under carriage in which the line feed pitch can be arranged regardless of aging or the open page. SOLUTION: At the time of carrying a medium, a correction amount of shift in the carrying amount which differs depending on the open page of a bankbook is registered in a memory 18. Based on the difference between a correction amount corresponding to the open page determined from the thickness of the medium and a correction amount at the time of actual shipment compared at a medium position comparing section 16, a correction amount of line feed pitch is determined for a specified line and printing is performed after correcting the line feed pitch by the correction amount thus determined when the specified line is printed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a printing position correcting mechanism in a medium processing apparatus for printing on a medium such as a passbook.

[0002]

2. Description of the Related Art A processing device for printing on a medium such as a passbook includes:
A roller that conveys the medium, a position sensor that detects the position of the medium, and a print head that prints on the medium. The roller conveys the medium to the print position in cooperation with the position sensor, and prints with the print head. It is. In the case of a booklet-like medium such as a passbook, the transport direction is perpendicular to the center fold (binding part), and the print line direction is parallel to the center fold. It is supposed to.

[0003]

When the center fold arrives at the roller during passbook conveyance, the conveyance force changes and the conveyance amount changes, so that the print line feed pitch changes. For this reason, there is a problem in that only a certain specific line has a different line feed pitch from another line due to the distance between the print head and the roller.

[0004] The amount of deviation changes with aging, and depending on the page where the passbook is opened, the medium thickness before and after the center fold may be almost the same or different. However, there is a problem that the deviation amount of the print line feed pitch is different. Therefore,
There is a problem that it is possible to adjust the line feed pitch regardless of aging and open pages.

[0005]

In order to solve the above-mentioned problem, the invention according to claim 1 stores a correction amount for a shift of a transport amount that differs depending on an opened page of a booklet medium when the medium is transported. The correction amount of the deviation according to the page determined by specifying the opened page of the medium and the correction amount of the deviation from the reference conveyance amount when the medium is conveyed, A print position correction mechanism in a medium processing apparatus, wherein a correction amount of a line feed pitch is obtained and corrected.

According to a second aspect of the present invention, in the print position correcting mechanism in the medium processing apparatus according to the first aspect, a detecting means for obtaining a thickness of the medium from a change in capacitance between the medium and the electrode is provided. A print position correction mechanism in a medium processing apparatus characterized in that an open page is specified from the thickness of the medium. According to a third aspect of the present invention, in the print position correction mechanism in the medium processing apparatus according to the second aspect, the thickness of the medium is continuously detected to determine whether the medium is a booklet medium, and the medium is a booklet medium. When the correction amount of the line feed pitch is obtained, the correction amount of the line feed pitch at the time of printing is determined from the correction amount of the deviation according to the page when the medium is transported and the correction amount of the deviation from the reference transport amount when the medium is transported. Determining the amount of correction and, when the medium is a paper sheet medium, determining the amount of correction of a line feed pitch during printing from the amount of correction of a deviation from a reference amount of conveyance when the medium is transported. This is a print position correction mechanism in the apparatus.

[0007]

FIG. 1 is a configuration diagram of a medium processing apparatus showing a first embodiment of a print position correcting mechanism according to the present invention. In the figure, 1 is a passbook, and 2 is a first position sensor for detecting the position of the passbook 1.

Reference numeral 3 denotes a plurality of rollers for transporting the passbook 1, 4 denotes a print head for printing on the passbook 1, and 5 denotes a platen arranged to face the print head 4. Reference numeral 6 denotes a capacitance type sensor, which is composed of electrodes forming a pair at a relatively short distance.
Reference numeral 7 denotes a medium thickness detection circuit which detects the thickness of the passbook from the output of the capacitance type sensor 6.

Reference numeral 8 denotes a second position sensor for detecting the position of the passbook 1, and the second position sensor 8 detects a shift amount during the passbook conveyance. In addition, as the arrangement of each element described above, four sets of rollers 3 of No. 1 to No. 4 are provided in front of the print head 4, and the first position sensor 2,
A capacitive sensor 6 between the No. 1 and No. 2 rollers 3;
The second position sensor 8 is provided between the rollers 3 of No. 3 and No. 4, and when the passbook 1 is transported to a position where the rear end of the passbook 1 passes through the second position sensor 8, the center fold 1a of the passbook 1 No. 4 is a positional relationship passing through the roller 3.

FIG. 2 is a block diagram showing details of the above-described medium thickness detection circuit. When a constant square wave voltage V is applied to the two pins of the resistor R4, the capacitance sensor 6 and the CR of the resistor R are applied.
The circuit generates a triangular wave at V1. When the medium thickness is small, the capacitance decreases and the triangular voltage increases. On the other hand, when the medium thickness is large, the capacitance increases and the triangular voltage decreases.

The voltage V1 is amplified to a voltage V2 by an amplifier 10, and further a linear voltage V3 is amplified by a linearizer circuit 11.
, And input to the comparators 12, 13 and 14, respectively. The signals detected by the comparators 11 to 14 are as follows:
It is input to the medium thickness detection unit 15 and determines whether it is a front cover page, a middle page, or the last page. The determination as to whether the front cover page, the middle page or the last page is made is made by comparing the voltage V3 with the reference voltages Vr1, Vr2, Vr3. FIG. 3 is a graph showing the relationship between the medium thickness and the voltage change.
Detection voltages V2, V3, reference voltages Vr1, Vr2, Vr3
And the medium thickness. If the voltage V3 is higher than the reference voltage Vr1, the page is determined to be a cover spread page. If the voltage V3 is lower than the reference voltage Vr2 and higher than Vr3, the page is determined to be a middle page, and the voltage V3 is determined to be the reference voltage Vr2. Lower and Vr
If it is lower than 3, it is determined to be the last page.

When the pages to be printed are the front cover page, the middle page, and the last page, the correction value of the deviation amount of the print line feed pitch is determined by the deviation amount of the passbook during the passbook conveyance, Is determined in consideration of the amount of deviation due to the step. FIG. 4 is a block diagram of the print position correcting mechanism according to the first embodiment. Reference numeral 16 denotes a medium position comparing unit, and 17 denotes an arithmetic processing unit. The correction amount based on the shift amount of the passbook 1 at the time is compared with the correction amount based on the shift amount of the passbook 1 at the time of shipping the device as a reference, and the arithmetic processing unit 17 calculates the difference. Thereby, a shift due to aging can be obtained.

Reference numeral 18 denotes a memory. Since the passbook 1 has a specific step between the front cover and the inner sheet, a correction amount of the step difference is registered in advance. Then, the arithmetic processing unit 17 takes out the correction amount from the memory 18 in accordance with the page determined by the medium thickness detecting unit 15 and determines the final amount from the difference between the actual and shipping correction amounts compared by the medium position comparing unit 16. Find the correct amount of correction.

Hereinafter, the operation of the first embodiment will be described. First, the passbook 1 is inserted, and when the first position sensor 2 detects this, it is sequentially conveyed by the rollers 3 of No1 to No4. Then, as shown in FIG.
When the passbook 1 passes between the paired electrodes of the capacitance type sensor 6 when passing between the transport roller 3 of No. 1 and the transport roller 3 of No. 2, as described above, The medium thickness detecting unit 15 determines whether the opened page of the passbook 1 is a cover facing page, a middle sheet page, or the last page from the capacitance that changes.

FIG. 5 is an explanatory diagram showing the operation of the first embodiment. The passbook 1 is transported to the position shown in FIG. 4, that is, the position where the rear end passes through the second position sensor 8. As a result, all the rollers 3 pass through the center fold 1a of the passbook 1. Then, return to the discharge direction. Then, based on the detection timing of the second position sensor 8 with respect to the number of pulses of the motor (not shown) for driving the roller 3 at this time, the correction amount based on the shift amount of the passbook 1 during actual operation of conveyance and the reference device The correction amount based on the deviation amount of the passbook 1 at the time of shipping is compared, and the arithmetic processing unit 17 calculates the difference.

The arithmetic processing unit 17 fetches the correction amount from the memory 18 in accordance with the page determined by the medium thickness detecting unit 15 and compares the correction amount between the actual time and the shipping time compared by the medium position comparing unit 16. , The final correction amount is obtained and stored in the memory 18. When printing is performed on a specific line having a deviation of the line feed pitch during actual printing, the correction amount stored in the memory 18 is called and transported. The amount is changed so that the print line feed pitch is uniform regardless of aging and the page to be printed.

As described above, in the first embodiment of the present invention, the printing deviation of the specific line of the passbook 1 caused by the center fold and different depending on the facing pages is described.
By detecting the thickness of the passbook 1 by a change in capacitance to determine a double-page spread, and by detecting the actual shift amount when the passbook 1 is conveyed, it is possible to detect a shift in printing of a specific line to a page to be printed. And can be corrected according to the actual deviation.

As a method for measuring the thickness of the passbook 1, there is a technique in which the passbook is pressed against a platen by a print head, and the thickness of the passbook is obtained from the movement amount of the print head at this time. Accurate determination may not be possible due to heat distortion. On the other hand, if the passbook thickness is determined based on a change in capacitance as in the present embodiment, the thickness can be accurately determined.

FIG. 6 is an explanatory diagram showing the operation of the second embodiment. Next, the second embodiment of the present invention will be described. The configuration of the print position correcting mechanism in the second embodiment is as follows.
This is the same as that described with reference to FIGS. 1, 2 and 4. The operation will be described below. First, the passbook 1 is inserted, and when the first position sensor 2 detects this, it is sequentially conveyed by the rollers 3 of No1 to No4.

Then, as shown in FIG.
As shown in FIG. 6B, the lower side of the passbook 1 with the center fold 1a as the boundary passes through the capacitance type sensor 6 from the position where the upper side with the center fold 1a as the boundary passes through the capacitance type sensor 6. The medium thickness is continuously detected by the medium thickness detection unit 15 at a distance to the position where the medium passes. Recognition of the distance for detecting the medium thickness is obtained, for example, based on the size of the passbook 1 by the number of pulses of the motor that drives the roller 3 after the first position sensor 2 detects the passbook 1. Is used.

When the medium being conveyed is the passbook 1, there is a center fold 1a, and the medium thickness changes at that portion. Accordingly, when the medium is conveyed as described above and the medium thickness changes during the medium thickness detection, it is determined that the medium being conveyed is the passbook 1, and the same processing as in the above-described first embodiment is performed. I do. On the other hand, if the medium being conveyed is a certificate, there is no center fold, so the medium thickness is constant. Accordingly, when the medium is conveyed as described above and the medium thickness does not change during the medium thickness detection, it is determined that the medium being conveyed is a certificate.

When it is determined that the medium being conveyed is a certificate, there is no center fold in the certificate, so that there is no difference in the printing deviation of a specific line or the deviation amount due to an open page.
Therefore, the shift at the time of conveyance caused by aging etc.
As described above, the arithmetic processing unit 17 determines the correction amount from the detection timing of the second position sensor 8 and determines the correction amount.
To be stored. At the time of actual printing, the memory 18
And changes the transport amount over the entire print line.

As described above, in the second embodiment of the present invention, the thickness of the medium being conveyed is continuously detected, and whether the medium to be printed is a passbook or a certificate is used. By determining whether or not there is, the line feed pitch can be corrected according to the type of the medium on which printing is to be performed.

[0024]

As described above, according to the present invention, when the medium is conveyed, the correction amount for the difference in the conveyance amount that differs depending on the opened page of the booklet medium is stored, and the page of the medium that is opened is stored. The correction amount of the deviation according to the page determined by specifying the amount of correction of the deviation from the reference conveyance amount when the medium is transported, from the correction amount of the line feed pitch at the time of printing, Since this is corrected, the deviation of the line feed pitch can be accurately corrected irrespective of aging and the open page of the booklet medium.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a medium processing apparatus showing a first embodiment of a print position correction mechanism of the present invention.

FIG. 2 is a block diagram showing details of a medium thickness detection circuit;

FIG. 3 is a graph showing a relationship between a medium thickness and a change in voltage.

FIG. 4 is a block diagram of a print position correction mechanism.

FIG. 5 is an explanatory diagram showing the operation of the first embodiment.

FIG. 6 is an explanatory diagram showing the operation of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Passbook 3 Roller 6 Capacitance sensor 7 Medium thickness detection circuit 8 Second position sensor

Claims (3)

[Claims] When a medium is conveyed, a correction amount for a deviation of a conveyance amount that differs depending on an opened page of a booklet medium is stored, and the page determined by specifying the opened page of the medium is stored. A medium for correcting a line feed pitch at the time of printing from a correction amount of a corresponding shift and a correction amount of a difference between a reference conveyance amount when the medium is conveyed, and correcting the same. A print position correction mechanism in the processing device. 2. The apparatus according to claim 1, further comprising detecting means for determining a thickness of the medium from a change in capacitance between the medium and an electrode, and specifying an open page from the thickness of the medium. Print position correction mechanism in the medium processing apparatus. 3. The method according to claim 2, wherein the thickness of the medium is continuously detected to determine whether or not the medium is a booklet medium. And the amount of correction for the deviation according to the page,
When the medium is transported, the correction amount of the line feed pitch at the time of printing is obtained from the correction amount of the deviation from the reference transport amount, and when the medium is a sheet-like medium, the correction amount becomes the reference when the medium is transported. A print position correction mechanism in a medium processing apparatus, wherein a correction amount of a line feed pitch at the time of printing is obtained from a correction amount of a deviation from a transport amount.