JPH0116674B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a label printer that prints a barcode along with data indicating weight, price, etc.

Technical Background and Problems Conventionally, there are multiple PULs, and each PLU has memory for unit price, product name, etc., as well as total memory for the number of packs, weight, price, etc., and the weight, unit price, price, etc. are stored on the label.
There are label printers that print barcodes in addition to the product name, processing date, effective date, etc. Some of these label printers have a non-addition mode using a mode changeover switch such as a key switch for operator training, so that the data contents are not added to the memory even if a label is printed. Exists. However, since the barcode of a label issued in such a mode is normal, if the label is read by a barcode scanner, the label may be read and registered in the normal state. Therefore, there is a possibility of unauthorized use.

OBJECTS OF THE INVENTION An object of the present invention is to provide a label printer that prints a barcode that cannot be read by a barcode scanner on a label issued in a non-additive mode.

SUMMARY OF THE INVENTION The present invention provides a bar code by changing the value of the modular check character of the bar code corresponding to the data to be printed to a value different from the normal value when the non-addition mode is set by the mode changeover switch. It is configured so that it cannot be read by a code scanner.

Embodiment of the invention First, in FIG. 1, the CPU 11 includes a weighing section 2,
A mode changeover switch 3 as a mode changeover means is connected, and a program memory 4 consisting of ROM and RAM, an RLU memory 5 consisting of RAM and also having a function as a total memory, a display and a setting section equipped with keys. CPU 27 that controls the key device 6 and printer
is connected. This CPU 27 has a program memory 8 consisting of ROM and RAM, ROM
A character generator 9 consisting of a RAM, and a print buffer 10 consisting of a RAM are connected. Also,
The CPU 27 includes a label detector 11, a pulse motor drive 13 that drives the pulse motor 12,
Common drive 1 that controls the thermal head 14
5 and an image signal drive 16 are connected.

Next, the printer section will be explained based on FIG. First, rectangular labels 18 are adhered to a long mount 17 at regular intervals. This mount 17 is wound up by a winding part (not shown) via a roller 19, a platen 20 serving as a label feeding part, a peeling plate 21, and a roller 22. A thermal head 14 is provided above the platen 20 and is connected to the label 18 for printing. Further, since the mount 17 is sharply bent at the part of the peeling plate 21, the label 18 is peeled off and pushed out horizontally.
A label detector 11 is provided adjacent to the label detector 1 . Furthermore, a pulley 23 is formed at the end of the platen 20, and a timing belt 25 is stretched between this pulley 23 and a pulley 24 of the pulse motor 12.

Next, the structure and operation of the thermal head 14 will be explained with reference to FIGS. 3 and 4. First, the thermal bed 14 has R1 to R256.
256 heating elements 26 are arranged in a direction perpendicular to the moving direction of the label 18, and these heating elements 26 are grouped into groups of 32 such as R1 to R32, R32 to R64, etc. It is divided into 8 groups, COM1 to COM8. The common drive 15 is divided into four categories by four transistors 27, and COM1 is a heating element 26 between COM8 and COM1.
It is connected to the. Similarly, COM2 and COM7
Connected to heating element 26 with COM2, COM3
Connected to the heating element 26 of COM6 and COM3,
COM4 is connected to a heating element 26 between COM5 and COM4.

Further, two data latch/picture signal drive circuits 28 and 29 are provided which operate in response to a data latch signal from the CPU 27 and a picture signal drive control signal from the picture signal drive 16.
The heating elements 26 of COM1 to COM4 are connected to one of these, and the heating elements 26 of COM5 to COM8 are connected to the other.
is connected.

Therefore, actual printing is performed at the timing shown in FIG. That is, one line printing cycle is divided into four equal parts and the pulse motor 12 is intermittently fed to perform 1/4 line feeding.
COM1, COM8, COM2 for each 1/4 line feed
energize the heating elements 26 of and COM7, COM3 and COM6, and COM4 and COM5.

Next, the operation will be explained based on the flowcharts of FIGS. 5 and 6. First, the fifth
The operation of the CPU 11 will be explained with reference to the diagram. After the power is turned on, each connected device is initialized, and the feed amount for controlling the print position and print format on the label 18 is transferred to the CPU 27, which controls the printer. Thereafter, the main routine is entered by scanning the display on the display/key device 6. In this main routine, data from the weighing section 2 is taken in, the state of the mode changeover switch 3 is read, and modes such as fixed amount issue mode, inspection and settlement mode, setting mode, etc. are set. Further, the key information of the display/key device 6 is taken in and processed.

After this, if it is in the weighing mode, the data in the weighing section 2 is multiplied by the unit price to obtain the price, and when the conditions for issuing the label 18 are set, the print F is set to 1, and data such as the price is output to the display/key device 6. and display it.
If print F is 1, the status of the printing device is checked, and if printing is OK, print data is set and transferred to the CPU 27. Thereafter, print F is reset to 0 and the process returns to the main routine.

Also, if the mode is the inspection settlement mode, the inspection settlement F is determined, and if it is not "0", the status of the printing device is checked, and if printing is OK, the print data is set, and this is transferred to the CPU 27. . Thereafter, the inspection settlement F is reset to 0 and the process returns to the main routine. Furthermore, if the mode is the setting mode, each setting task is performed and the process returns to the main routine.

Next, the operation of the CPU 27 that controls the printer will be explained based on FIG. After turning on the power, each connected device is initialized, receives the feed amount to control the print format, print position, etc. on the label 18 from the CPU 11,
Enter the main routine. In the main routine, it is first determined whether or not paper is to be fed, and if it is, the pulse motor drive 13 is driven, the pulse motor 12 is rotated, and the process returns to the main routine.
At this time, if paper is not being fed, data from the CPU 11 is received. If this data is the amount of feed, that data is processed and the process returns to the main routine. If this is print data, the data is processed, the character generator 9 is processed, a print pattern is generated on the print buffer 10 and printed, and the process returns to the main routine.

Next, the subroutine will be explained based on FIGS. 7 and 8. First, what is shown in FIG. 7 is a routine for outputting data to the CPU 27 in the metering/fixed amount issuing mode in FIG. That is,
The mode changeover switch 3 checks whether it is an addition mode or a non-addition mode, and if it is an addition mode, the addition F is set to 0, data is added to the total memory, the data is transferred to the CPU 27, and the process returns. Also, in non-additive mode,
After setting the addition F to 1, the data is transferred to the CPU 27 and the process returns.

Next, what is shown in FIG. 8 is the data processing routine in FIG. First, a modular check character calculation is performed. This simply adds the numerical values of each digit of the data to be printed to find the first digit of the total value. The first digit of the addition result may be any one of the numbers 0 to 9 depending on the content of the data to be printed. So, when we look at a single label, we simply calculate the data to be printed on that label, find the first digit of the total value, and add some value x to that value. Processing is performed so that the numerical value of the digit becomes a predetermined constant numerical value C. The value x in this case is determined by modular check character calculation.

For example, the setting of a certain value C is not particularly lawful and is determined arbitrarily. Now let us assume that this number C is 5. Therefore, by simply calculating the numerical value of each digit of the data to be printed, and assuming that the first digit is 3, the calculation will be (3 + x), and the total value of the first digit will be 5. A single-digit value x is found. Here, x=2.

Similarly, to give another example, the numerical value C is set to be 5, so the numerical value of each digit of the data to be printed is simply calculated, and the first numerical value is 9.
If this is the case, a one-digit value x such that the first digit of the total value is 5 is calculated by counting (9+x). Here, x=6.

When a barcode with the modular check character set is read in this way, a simple calculation is made between the numerical value of the data to be printed and the modular check character, and the first digit is calculated. Sometimes that number is C (5 in the above implementation)
If so, it means that the reading was correct. On the other hand, if you do a simple calculation between the numerical value of the data to be printed and the character of the modular check and find the first digit, and the numerical value is not C, then it means that you have not read it correctly. Become.

Then, check whether the addition F is 1 or not,
When the addition F is 1 in the non-addition mode, when calculating the modular check character described above, +1 is added to the calculated modular check character. With this setting, when a printed bar code is read, the numerical value C is not found as a result of the modular check, resulting in incorrect reading, and the bar code becomes essentially unreadable. Therefore, all labels 18 that are emitted in the non-addition mode are unreadable.

Effects of the Invention As described above, when the addition mode is set by the mode switching means, data and barcodes are printed and the data is totaled in the total memory, and in the non-addition mode, the data is is not added to the aggregate memory,
Additionally, the modular check character for barcodes works differently from regular ones, so it is impossible to read them with a barcode scanner. Even if a label is issued, the label is essentially invalid and cannot be used fraudulently.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a block diagram, FIG. 2 is a side view of the main parts of the printer section, and FIG. 3 is a circuit diagram of the thermal head shown in relation to a label. Figure 4 is a timing chart, Figure 5 is a flowchart showing the operation of CPU1, and Figure 6 is a timing chart.
The figure is a flowchart showing the operation of CPU2, Figures 7 and 8 are flowcharts of subroutines,
FIG. 9 is a conceptual diagram showing the concept of the invention. 3...Mode switching switch (mode switching means),
5...PLU memory (total memory), 18...
label.

Claims (1)

[Claims] 1 Data on the issued label in which data such as weight and price and a barcode corresponding to this data are printed on the label using a large number of heating elements arranged in a direction perpendicular to the direction of movement of the label. A mode switching means is provided for switching between an addition mode in which the barcode is added to the total memory and a non-addition mode in which the barcode is not added to the total memory. A label printer characterized in that it is provided with a modular check conversion means for converting a character value to a value different from a normal value.