JP5888764B2 - Method for correcting transport distance of marked paper, thermal printer and program - Google Patents

Description

  The present invention relates to a correction method for a conveyance distance of a marked sheet, a thermal printer, and a program.

  2. Description of the Related Art Conventionally, thermal printers used for receipts and records (journals) are known (see, for example, Patent Document 1).

  There is also known a thermal printer having a position correction function for detecting a mark in a sheet and automatically conveying the sheet. This thermal printer performs ruled line printing. Then, the user measures the distance between the ruled line and the reference position with a ruler, and the thermal printer corrects the printing position deviation based on the measurement result.

  Thermal printers that do not have a position correction function are also known. This thermal printer includes a printing mechanism and a mark detection sensor, and corrects the displacement of the printing position by structurally adjusting the distance between the printing mechanism and the mark detection mechanism.

JP 2009-255348 A

  However, when the distance between the ruled line and the reference position is measured with a ruler, a ruler is always necessary to correct the printing position deviation. Also, it is troublesome for the user to measure the distance between the ruled line and the reference position with a ruler. On the other hand, when the distance between the printing mechanism and the mark detection mechanism is structurally adjusted, an adjustment mechanism is required, which increases the manufacturing cost of the thermal printer.

  An object of the present invention is to provide a method for correcting a conveyance distance of a marked sheet, a thermal printer, and a program that can easily and inexpensively correct a printing position shift.

In order to achieve the above object, a method for correcting the transport distance of a marked paper is a predetermined distance while detecting a mark of the marked paper and recognizing the transport distance of the marked paper after the detection of the mark. after only by transporting the marked paper, and print a plurality of ruled lines are arranged at regular printing intervals in the conveying direction of the marked sheet on the marked sheet, the mark in the conveying direction of the marked sheet the identifier of the ruled line to be printed on the reference position is a lower end, by multiplying the actual printing interval of the border of the conveying direction of the marked sheet on the difference between the identifier of the ruled lines printed on the reference position, A correction value for the transport distance of the marked paper is acquired, and when the data is printed, the correction value is added to the transport distance of the marked paper. According to such a configuration, it is possible to easily correct the displacement of the printing position at low cost.

  Preferably, the correction value is stored in a nonvolatile memory. According to this configuration, the correction value can be stored even after the apparatus is turned off.

Preferably, the reference position, and wherein in place of the lower end of the mark in the conveying direction of the marked sheet, which is pre-printed ruled lines at a constant distance away from the mark to the marked paper To do. According to such a configuration, it is possible to easily correct the displacement of the printing position at low cost.

  More preferably, the color of the pre-printed ruled line is different from the color of a plurality of ruled lines printed on the marked paper. According to such a configuration, it is possible to easily determine a ruled line that overlaps a preprinted ruled line.

Preferably, the plurality of ruled lines are shifted by an interval corresponding to the width of each ruled line in the transport direction of the marked paper, and are printed so that the ruled lines are not overlapped in the width direction of the marked paper. characterized in that that. According to such a configuration, the user can grasp the correction value visually without using a ruler.

  Preferably, the plurality of ruled lines are printed such that ruled lines and intervals corresponding to the widths of the ruled lines are alternately repeated in the conveyance direction of the marked paper. According to such a configuration, the user can grasp the correction value visually without using a ruler.

  Preferably, the plurality of ruled lines are a plurality of ruled lines having different lengths in the width direction of the marked paper, and the plurality of ruled lines having different lengths are alternately repeated in the conveyance direction of the marked paper. It is characterized by being. According to such a configuration, the user can grasp the correction value visually without using a ruler.

  Preferably, an identifier for identifying each ruled line is printed in the vicinity of the plurality of ruled lines. With this configuration, it is possible to easily identify a ruled line that overlaps the reference position.

In order to achieve the above object, the thermal printer detects the mark on the marked paper and, after detecting the mark, recognizes the transport distance of the marked paper and recognizes the transport distance of the marked paper by a predetermined distance. and control means for performing control to convey the sheet, and printing means for printing a plurality of borders to the marked paper to be placed at a fixed print gap in the conveying direction of the marked sheet, the conveying direction of the marked sheet multiplying the identifier of the ruled line to be printed on the reference position is a lower end of the mark, the actual printing interval of the border of the conveying direction of the marked sheet on the difference between the identifier of the ruled lines printed on the reference position in the An acquisition means for acquiring a correction value for the conveyance distance of the marked paper, and the correction to the conveyance distance of the marked paper when printing the data. Characterized by an adding means for adding. According to such a configuration, it is possible to easily correct the displacement of the printing position at low cost.

In order to achieve the above object, the program causes the computer to detect the mark on the marked paper, and after detecting the mark, the program recognizes the transport distance of the marked paper and recognizes the mark by a predetermined distance. control means for controlling for conveying paper attached, printing means for printing a plurality of borders to the marked paper to be placed at a fixed print gap in the conveying direction of the marked sheet, the conveying direction of the marked sheet the identifier of the ruled line to be printed on the reference position is a lower end of the mark, multiplying the actual printing interval of the border of the conveying direction of the marked sheet on the difference between the identifier of the ruled lines printed on the reference position The acquisition means for acquiring the correction value for the transport distance of the marked paper, and the print distance before the marked paper when printing the data. Characterized in that to function as addition means for adding the correction value.

  According to the present invention, it is possible to correct the displacement of the printing position inexpensively and easily.

It is a schematic block diagram of the thermal printer which concerns on this Embodiment. (A) is a figure which shows an example of the paper 30 with the mark before printing. (B) is a diagram illustrating an example of the marked paper 30 when no positional deviation has occurred after printing. (C) is a diagram illustrating an example of the marked paper 30 when a positional deviation has occurred after printing. (A) is a figure which shows an example of the printing result of a ruled line. (B) is a figure which shows an example of the ruled line which should be printed. FIG. 8C is a diagram illustrating an example of ruled lines printed on the marked paper 30. (D) is a diagram showing an example in which ruled lines and ruled line numbers are printed. It is a flowchart which shows a 1st correction process. It is a flowchart which shows a printing process. (A) is a diagram showing an example of ruled lines preprinted on the marked paper 30. FIG. (B) is a diagram showing an example in which a ruled line for correcting the printing position is printed on the preprinted ruled line of (A). It is a flowchart which shows a 2nd correction process. 4 is a diagram illustrating an example of ruled lines printed on a marked paper 30. FIG. It is a flowchart which shows a 3rd correction process. (A)-(C) are figures which show the modification of the ruled line printed on the paper 30 with a mark.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a thermal printer according to the present embodiment.

  In FIG. 1, the thermal printer 1 includes a printing mechanism 11 that functions as a printing unit, a paper conveyance mechanism 12 that functions as a conveyance unit, a mark detection mechanism 13 that functions as a detection unit, and a control circuit 20. The printing mechanism 11 has a plurality of heating elements 11A that color the marked paper 30 as thermal paper in a direction perpendicular to the paper transport direction (that is, the width direction of the marked paper 30). The paper transport mechanism 12 includes a roller 12A and a stepping motor 12B. The mark detection mechanism 13 includes a reflection type photosensor 13A that includes an infrared light emitting diode and a phototransistor that receives infrared rays and amplifies current as a mark detection sensor.

  The control circuit 20 of the thermal printer 1 includes an MCU (Micro Controller Unit) 21, a print control unit 22, a paper transport control unit 23, a mark detection control unit 24, a nonvolatile memory 25, and an input unit 27. The MCU 21 controls the overall operation of the thermal printer 1. The MCU 21 functions as an example of an acquisition unit and an addition unit. The print control unit 22 transmits print data to the printing mechanism 11 by controlling the current that flows through the plurality of light emitters 11 </ b> A of the printing mechanism 11. The paper transport control unit 23 controls the operation of the stepping motor 12B of the paper transport mechanism 12 in response to a command from the MCU 21. The mark detection control unit 24 converts the output current of the reflective photosensor 13A into a voltage. The non-insertion memory 25 stores a correction value for correcting a printing position shift described later. The input unit 27 is an interface for inputting data, and is an interface including a display device and buttons or an interface connected to the computer 35.

  The printing operation is performed by the printing mechanism 11 and the paper transport mechanism 12, and the marked paper 30 is transported between the printing mechanism 11 and the paper transport mechanism 12. The print control unit 22 causes a current to flow through the plurality of heating elements 11 </ b> A in response to an instruction from the MCU 21, so that the printing mechanism 11 performs dot-shaped printing in the width direction of the marked paper 30. The paper transport mechanism 12 receives an instruction from the MCU 21 via the paper transport control unit 23 and repeats paper transport for a distance corresponding to one dot pixel to form an image or a character.

  On the other hand, the mark detection operation is performed by the paper transport mechanism 12 and the mark detection mechanism 13. The mark detection mechanism 13 reflects infrared light on the marked paper 30 and detects the amount of current generated by the photodiode, thereby determining whether or not the mark on the marked paper 30 has passed over the reflective photosensor 13A. Is detected.

  In the marked paper 30, the mark is black and the paper itself is white. In the reflective photosensor 13A, the output power corresponding to the white portion of the paper increases, and the output power corresponding to the black portion (that is, the mark) of the paper decreases. The output current of the reflective photosensor 13A is converted into a voltage by the mark detection control unit 24, and the voltage is read as a digital value by the AD converter 26 included in the MCU 21. Thereby, the MCU 21 detects the passage of the mark. At the same time, the MCU 21 performs transport control of the marked paper 30 while recognizing the transport distance of the marked paper 30 via the paper transport control unit 23. Therefore, the MCU 21 can recognize the transport distance of the marked paper 30 after detecting the passage of the mark.

  FIG. 2A is a diagram illustrating an example of the marked sheet 30 before printing. FIG. 2B is a diagram illustrating an example of the marked paper 30 when there is no positional deviation after printing. FIG. 2C is a diagram illustrating an example of the marked sheet 30 in a case where a positional deviation has occurred after printing.

  As shown in FIG. 2A, a mark 31 and a background as shown in Table 32 are printed in advance on the marked paper 30 in a predetermined format. The marked sheet 30 is stopped at a position determined by the mark. In the table 32, predetermined data is printed as shown in FIG. The base is not limited to Table 32, and the base may be omitted.

  Incidentally, the distance between the mark detection mechanism 13 and the printing mechanism 11 may be different even in the same type of thermal printer. This is because the attachment positions of the mark detection mechanism 13, the printing mechanism 11, the reflective photosensor 13A, and the like may be slightly shifted in the manufacturing process of the thermal printer. For this reason, as shown in FIG. 2C, data may not be printed at an appropriate position.

  Therefore, the thermal printer 1 according to the present embodiment corrects the printing position deviation by an inexpensive and easy method.

  First, a conventional method of correcting a printing position shift will be described.

  In the conventional method of correcting the deviation of the printing position, the position where the user writes a ruled line is set in the thermal printer 1. For example, the user sets a position 1 cm away from the mark 31 in the thermal printer 1. Thereafter, the thermal printer 1 actually prints ruled lines on the marked paper 30. Specifically, after detecting the mark 31, the thermal printer 1 conveys the marked paper 30 by 1 cm and prints ruled lines. An example of the ruled line printing result is shown in FIG. The user measures the distance between the mark 31 and the ruled line with a ruler.

  For example, when the measured value is 0.9 cm, the difference between the set value (1 cm) and the measured value (for example, 0.9 cm) is the correction value (0.1 cm). Further, when the measured value is 1.1 cm, the correction value is −0.1 cm. The user sets the correction value in the thermal printer 1. Thereby, the thermal printer 1 adds the correction value to the paper conveyance distance and conveys the marked paper 30 when the mark is detected, so that the deviation of the printing position is corrected.

  Next, a method for correcting a printing position shift according to the present embodiment will be described.

  FIG. 4 is a flowchart showing the first correction process. Here, the distance between the mark detection mechanism 13 and the printing mechanism 11 is Xa.

  First, when the mark detection mechanism 13 detects the mark 31 (step S1), the paper transport mechanism 12 transports the marked paper 30 by (Xa-1) mm according to a command from the MCU 21 (step S2). Thereafter, while the paper transport mechanism 12 transports the marked paper 30 at intervals of 0.125 mm, the printing mechanism 11 prints ruled lines on the marked paper 30 at intervals of 0.125 mm (step S3).

  Here, an example of ruled lines to be printed is shown in FIG. An example of ruled lines printed on the marked paper 30 is shown in FIG. In FIG. 3B, 16 ruled lines 51 </ b> A to 51 </ b> P are printed on the marked paper 30. The mark 31 and the ruled lines 51A to 51P are black. Further, the ruled lines 51A to 51P are shifted at intervals of 0.125 mm in the paper transport direction, and are shifted so that the ruled lines do not overlap in the paper width direction.

  In FIG. 3C, the lower end of the mark 31 is the reference position. The reference position is a position for detecting a printing position shift. As described above, the ruled lines are printed at intervals of 0.125 mm after the marked sheet 30 is conveyed by (Xa-1) mm. Therefore, if there is no shift in the printing position, the ruled lines 51H are marked with the marks 31. It overlaps with the lower end (that is, the reference position). However, in FIG. 3C, the reference position overlaps the ruled line 51F. Accordingly, since the ruled line is printed at a position shorter than the distance Xa by two ruled lines, the correction value is 0.25 mm (= 0.125 mm * 2). Thus, the ruled lines 51A to 51P are printed at equal intervals in the paper transport direction and printed so that the ruled lines do not overlap in the paper width direction, so that the user can visually correct the correction value without using a ruler. Can be grasped. In FIG. 3C, the ruled line 51F is displayed in white for the sake of explanation, but the actual ruled line 51F is black as in the other ruled lines.

  Returning to FIG. 4, the user sets the number of the ruled line overlapping the reference position in the MCU 21 via the input unit 27 (step S4). The ruled lines 51A to 51P are assigned numbers 1 to 16 in advance. In FIG. 3C, since the reference position overlaps the ruled line 51F, the user sets the number “6” of the ruled line 51F in the MCU 21. As shown in FIG. 3D, an identifier (for example, a number or a symbol) for identifying the ruled line may be printed above or below each ruled line when printing the ruled line. Further, when printing the ruled line, an identifier (for example, a number or a symbol) for identifying the ruled line may be printed on the left or right of each ruled line. Thereby, the number of the ruled line that overlaps the reference position can be easily identified.

  Thereafter, the MCU 21 calculates a correction value for the sheet conveyance distance based on the set number (step S5). Specifically, the MCU 21 determines the difference between the number of the ruled line to be printed at the reference position (number 8 of the ruled line 51H) and the number of the ruled line actually printed at the reference position (number 6 of the ruled line 51F). Is multiplied by the printing interval (0.125 mm) to calculate a correction value for the paper transport distance. The MCU 21 stores the calculated correction value (0.25 mm in FIG. 3C) in the nonvolatile memory 25 (step S6), and this process ends. The MCU 21 uses the difference between the number of the ruled line to be printed at the reference position and the number of the ruled line actually printed at the reference position when calculating the correction value of the sheet conveyance distance. A difference between a ruled line symbol to be printed (for example, H) and a ruled line symbol (for example, F) actually printed at the reference position may be used. In this case, the difference between the symbol F and the symbol H is 2.

  In the first correction process of FIG. 4, the MCU 21 calculates the correction value for the paper conveyance distance, but the computer 35 may calculate the correction value for the paper conveyance distance. In this case, the user sets the number of the ruled line that overlaps the reference position in the computer 35, and the computer 35 calculates the correction value of the sheet conveyance distance, and the calculated correction value is input to the MCU 21 via the input unit 27. Send.

  FIG. 5 is a flowchart showing the printing process. Here, it is assumed that the thermal printer 1 prints a plurality of data at positions separated from the lower end (reference position) of the mark 31 by Xb and Xcmm.

  First, the MCU 21 reads a correction value from the nonvolatile memory 25 (step S11). When the mark detection mechanism 13 detects the mark 31 (step S12), the paper transport mechanism 12 transports the marked paper 30 by (Xa + Xb + correction value) mm according to a command from the MCU 21 (step S13). The paper transport mechanism 12 prints the first data on the marked paper 30 (step S14). Thereafter, the paper transport mechanism 12 transports the marked paper 30 by Xcmm in response to a command from the MCU 21 (step S15). The paper transport mechanism 12 prints the next data on the marked paper 30 (step S16). As described above, when the first data is printed (step S13), the correction value is added to the sheet transport distance (here, Xa + Xb), so that the print positions of the first data and the next data are accurately corrected. .

  Then, the MCU 21 determines whether or not the condition for ending printing is satisfied (step S17). The condition for ending printing is, for example, that printing of a preset number of copies has been completed or that a printing end instruction has been input to the MCU 21. If YES in step S17, the process ends. On the other hand, if NO in step S17, the procedure returns to step S12.

  Next, the second correction process will be described. The second correction process is different from the first correction process in that the reference position is a light-colored ruled line pre-printed.

  An example of ruled lines preprinted on the marked paper 30 is shown in FIG. FIG. 6B shows an example in which a ruled line for correcting the printing position is printed on the preprinted ruled line in FIG. The mark 31 shown in FIG. 6A is black, and the preprinted ruled line 61 is a light color (for example, light blue). Further, the 16 ruled lines shown in FIG. 6B are black and are the same as the ruled lines 51A to 51P in FIG. 3B. The pre-printed ruled line 61 indicates a reference position, and is preprinted at a position away from the lower end of the mark 31 by a certain distance Xd (for example, 1 cm).

  FIG. 7 is a flowchart showing the second correction process. Here, the distance between the mark detection mechanism 13 and the printing mechanism 11 is Xa.

  First, when the mark detection mechanism 13 detects the mark 31 (step S31), the paper transport mechanism 12 transports the marked paper 30 by (Xa + Xd-1) mm according to a command from the MCU 21 (step S32). Thereafter, while the paper transport mechanism 12 transports the marked paper 30 at intervals of 0.125 mm, the printing mechanism 11 prints ruled lines on the marked paper 30 at intervals of 0.125 mm (step S33).

  As described above, the ruled lines are printed at intervals of 0.125 mm after the marked paper 30 is conveyed by (Xa + Xd-1) mm. Therefore, if there is no shift in the printing position, the ruled lines 51H are preprinted. It overlaps with the ruled line 61 (reference position). However, in FIG. 6B, the reference position overlaps the ruled line 51F. Accordingly, since the ruled line is printed at a position shorter than the distance Xa + Xd by two ruled lines, 0.25 mm (= 0.125 mm * 2) is the correction value. Returning to FIG. 7, the user sets the number of the ruled line overlapping the reference position in the MCU 21 via the input unit 27 (step S34). The ruled lines 51A to 51P are assigned numbers 1 to 16 in advance. In FIG. 6B, since the reference position overlaps the ruled line 51F, the user sets the number “6” of the ruled line 51F in the MCU 21. As shown in FIG. 3D, an identifier (for example, a number or a symbol) for identifying the ruled line may be printed above or below each ruled line when printing the ruled line. Further, when printing the ruled line, an identifier (for example, a number or a symbol) for identifying the ruled line may be printed on the left or right of each ruled line. Thereby, the number of the ruled line that overlaps the reference position can be easily identified.

  Thereafter, the MCU 21 calculates a correction value for the sheet transport distance based on the set number (step S35). Specifically, the MCU 21 determines the difference between the number of the ruled line to be printed at the reference position (number 8 of the ruled line 51H) and the number of the ruled line actually printed at the reference position (number 6 of the ruled line 51F). Is multiplied by the printing interval (0.125 mm) to calculate a correction value for the paper transport distance. The MCU 21 stores the calculated correction value (0.25 mm in FIG. 6B) in the nonvolatile memory 25 (step S36), and this process ends. The MCU 21 uses the difference between the number of the ruled line to be printed at the reference position and the number of the ruled line actually printed at the reference position when calculating the correction value of the sheet conveyance distance. A difference between a ruled line symbol to be printed (for example, H) and a ruled line symbol (for example, F) actually printed at the reference position may be used. In this case, the difference between the symbol F and the symbol H is 2.

  In the second correction process of FIG. 7, the MCU 21 calculates the correction value for the paper conveyance distance, but the computer 35 may calculate the correction value for the paper conveyance distance. In this case, the user sets the number of the ruled line that overlaps the reference position in the computer 35, and the computer 35 calculates the correction value of the sheet conveyance distance, and the calculated correction value is input to the MCU 21 via the input unit 27. Send.

  Further, in the second correction process, the ruled line 61 is a light color (for example, light blue) and the ruled lines 51A to 51P are black. Therefore, the ruled line overlapping the ruled line 61 can be easily determined. In the second correction process, the ruled line 61 is preprinted on the marked paper 30, so that the mark 31 is printed on the back side of the paper, and the ruled lines 51 </ b> A to 51 </ b> P and the ruled line 61 are printed on the front surface of the paper. The reference position can be defined.

  Next, the third correction process will be described. The third correction process is different from the first correction process in that the reference position is a label break on the marked paper 30.

  An example of ruled lines printed on the marked paper 30 is shown in FIG. The marked paper 30 in FIG. 8 has a base as a release paper and a printing area as a label 34. A fixed-length label 34 is repeatedly formed on the marked paper 30. In the third correction process, the break 71 between the labels 34 is set as a reference position. The cut 71 between the labels 34 is assumed to be at a position away from the lower end of the mark 31 by a certain distance Xe (for example, 6 cm). The 16 ruled lines shown in FIG. 8 are black and are the same as the ruled lines 51A to 51P in FIG.

  FIG. 9 is a flowchart showing the third correction process. Here, the distance between the mark detection mechanism 13 and the printing mechanism 11 is Xa.

  First, when the mark detection mechanism 13 detects the mark 31 (step S41), the paper transport mechanism 12 transports the marked paper 30 by (Xa + Xe-1) mm according to a command from the MCU 21 (step S42). Thereafter, while the paper transport mechanism 12 transports the marked paper 30 at intervals of 0.125 mm, the printing mechanism 11 prints ruled lines on the marked paper 30 at intervals of 0.125 mm (step S43).

  As described above, the ruled lines are printed at intervals of 0.125 mm after the marked paper 30 is conveyed by (Xa + Xe-1) mm. This overlaps with the cut 71 (reference position). However, in FIG. 8, the reference position overlaps the ruled line 51F. Accordingly, the ruled line is printed at a position shorter than the distance Xa + Xe by two ruled lines, so that the correction value is 0.25 mm (= 0.125 mm * 2). Returning to FIG. 9, the user sets the number of the ruled line that overlaps the reference position in the MCU 21 via the input unit 27 (step S44). The ruled lines 51A to 51P are assigned numbers 1 to 16 in advance. In FIG. 8, since the reference position overlaps the ruled line 51F, the user sets the number “6” of the ruled line 51F in the MCU 21. As shown in FIG. 3D, an identifier (for example, a number or a symbol) for identifying the ruled line may be printed above or below each ruled line when printing the ruled line. Further, when printing the ruled line, an identifier (for example, a number or a symbol) for identifying the ruled line may be printed on the left or right of each ruled line. Thereby, the number of the ruled line that overlaps the reference position can be easily identified.

  Thereafter, the MCU 21 calculates a correction value for the sheet conveyance distance based on the set number (step S45). Specifically, the MCU 21 determines the difference between the number of the ruled line to be printed at the reference position (number 8 of the ruled line 51H) and the number of the ruled line actually printed at the reference position (number 6 of the ruled line 51F). Is multiplied by the printing interval (0.125 mm) to calculate a correction value for the paper transport distance. The MCU 21 stores the calculated correction value (0.25 mm in FIG. 8) in the nonvolatile memory 25 (step S46), and this process ends. The MCU 21 uses the difference between the number of the ruled line to be printed at the reference position and the number of the ruled line actually printed at the reference position when calculating the correction value of the sheet conveyance distance. A difference between a ruled line symbol to be printed (for example, H) and a ruled line symbol (for example, F) actually printed at the reference position may be used. In this case, the difference between the symbol F and the symbol H is 2.

  In the third correction process of FIG. 9, the MCU 21 calculates the correction value for the paper conveyance distance, but the computer 35 may calculate the correction value for the paper conveyance distance. In this case, the user sets the number of the ruled line that overlaps the reference position in the computer 35, and the computer 35 calculates the correction value of the sheet conveyance distance, and the calculated correction value is input to the MCU 21 via the input unit 27. Send.

  In the third correction process, since the cut 71 between the labels 34 is used as a reference position, it is not necessary to pre-print a light-colored ruled line as shown in the second correction process. In the third correction process, the reference position can be defined even when the mark 31 is printed on the back surface of the paper and the ruled lines 51A to 51P are printed on the front surface of the paper.

  In the first to third correction processes, as shown in FIGS. 3B, 6B, and 8, the ruled lines 51A to 51P are printed on the marked paper 30 so as to be shifted in the paper width direction. . For example, as shown in FIG. 10A, the ruled lines printed on the marked paper 30 may be configured such that a portion printed at intervals of 0.125 mm and a portion not printed are repeated. Also, as shown in FIG. 10B, the ruled lines printed on the marked paper 30 may be formed in a staggered pattern. Further, as shown in FIG. 10C, the ruled lines printed on the marked paper 30 may be formed such that ruled lines having different lengths are repeated, that is, may be formed in a comb-like shape. .

  In the first to third correction processes, the width of each ruled line is 0.125 mm, but the present invention is not limited to this.

  As described above, according to the present embodiment, the thermal printer 1 conveys the marked paper by a predetermined distance after the mark detection mechanism 13 that detects the mark of the marked paper and the detection of the mark. A paper transport mechanism 12 that performs printing, a printing mechanism 11 that prints a plurality of ruled lines on a marked sheet, and a ruled line that has a difference between a ruled line identifier that should be printed at the reference position and a ruled line identifier that is actually printed at the reference position. And an MCU 21 that obtains a correction value for the transport distance of the marked paper and multiplies the correction distance to the transport distance of the marked paper when printing data. Therefore, it is possible to correct the printing position deviation inexpensively and easily without measuring the printing position deviation with a ruler.

  The present invention is not limited to the above-described embodiment, and can be implemented with various modifications within a range not departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1 Thermal printer 11 Printing mechanism 11A Heat generating body 12 Paper conveyance mechanism 12A Roller 12B Stepping motor 13 Mark detection mechanism 13A Reflection type photo sensor 20 Control circuit 21 MCU
DESCRIPTION OF SYMBOLS 22 Print control part 23 Paper conveyance control part 24 Mark detection control part 25 Nonvolatile memory 26 AD converter 27 Input part

Claims (10)

Detect marks on marked paper,
After the mark is detected, the marked paper is transported by a predetermined distance while recognizing the transport distance of the marked paper, and then a plurality of prints are arranged at a constant printing interval in the transport direction of the marked paper. Printed on the marked paper,
The difference between the identifier of the ruled line to be printed at the reference position that is the lower end of the mark in the transport direction of the marked paper and the identifier of the ruled line actually printed at the reference position is the difference in the transport direction of the marked paper. By multiplying the printing interval of each ruled line, obtain the correction value of the transport distance of marked paper,
A correction method for the transport distance of a marked paper, wherein the correction value is added to the transport distance of the marked paper when printing data.   The method of correcting a transport distance of a marked sheet according to claim 1, wherein the correction value is stored in a nonvolatile memory. Claim wherein the reference position, in place of the lower end of the mark in the conveying direction of the marked sheet, characterized in that it is a pre-printed ruled lines at a constant distance away from the mark to the marked paper 3. A method for correcting a conveyance distance of a marked sheet according to 1 or 2.   4. The method for correcting a transport distance of marked paper according to claim 3, wherein the color of the pre-printed ruled line is different from the color of a plurality of ruled lines printed on the marked paper.   The plurality of ruled lines are printed by being shifted in the conveyance direction of the marked paper by an interval corresponding to the width of each ruled line, and shifted so that the ruled lines do not overlap in the width direction of the marked paper. 5. The method for correcting a transport distance of a marked sheet according to claim 1,   5. The plurality of ruled lines are printed such that ruled lines and intervals corresponding to the widths of the ruled lines are alternately repeated in the transport direction of the marked paper. The correction method of the conveyance distance of the marked paper as described in claim | item.   The plurality of ruled lines are a plurality of ruled lines having different lengths in the width direction of the marked paper, and the plurality of ruled lines having different lengths are alternately repeated in the conveyance direction of the marked paper. 5. The method for correcting a transport distance of a marked sheet according to claim 1,   8. The method for correcting a transport distance of a marked sheet according to claim 1, wherein an identifier for identifying each ruled line is printed in the vicinity of the plurality of ruled lines. Detection means for detecting marks on the marked paper;
Control means for performing control to convey the marked paper by a predetermined distance while recognizing the conveyance distance of the marked paper after detection of the mark;
Printing means for printing a plurality of ruled lines arranged at a constant printing interval in the transport direction of the marked paper on the marked paper;
The difference between the identifier of the ruled line to be printed at the reference position that is the lower end of the mark in the transport direction of the marked paper and the identifier of the ruled line actually printed at the reference position is the difference in the transport direction of the marked paper. An obtaining means for obtaining a correction value of the transport distance of the marked paper by multiplying the printing interval of each ruled line;
An addition unit that adds the correction value to the transport distance of the marked sheet when printing data. Computer
Detection means for detecting marks on marked paper,
A control means for performing control for conveying the marked paper by a predetermined distance while recognizing the conveyance distance of the marked paper after the detection of the mark;
Printing means for printing a plurality of ruled lines arranged at a constant printing interval in the conveyance direction of the marked paper on the marked paper;
The difference between the identifier of the ruled line to be printed at the reference position that is the lower end of the mark in the transport direction of the marked paper and the identifier of the ruled line actually printed at the reference position is the difference in the transport direction of the marked paper. An acquisition unit that acquires a correction value for the conveyance distance of the marked paper by multiplying the printing interval of each ruled line, and an addition unit that adds the correction value to the conveyance distance of the marked paper when printing data A program characterized by functioning as

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