JPH0374796A - Electronic cash register - Google Patents

Abstract

PURPOSE:To attain the overlap print to the immediately preceding print data and to increase the printing speed by providing a print mechanism like a stamp, etc., at a position distant from a line thermal head in the form feeding direction by an extent equal to several lines and actuating the print mechanism to print a heat-sensitive sheet form. CONSTITUTION:When a heat-sensitive sheet form is fed for each line, a print mechanism is set at a position distant from a line thermal heat P2 in the form feeding direction by an extent equal to one line. Thus the print mechanism works to perform the overlap print when a overlap print command is produced to the immediately preceding print data since the corresponding data is positioned at the print position of the print mechanism. Thus the overlap print is attained to the immediately preceding print data by means of a thermal printer containing the heat P2. Then the printing speed is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic cash register that uses a thermal printer equipped with a line thermal head as a printer for receipts and the like.

[Prior Art] Conventional electronic cash registers typically use dot printers as printers for receipts and the like.

Due to its mechanism, this dot printer does not feed the paper when it completes printing one line, but when the next line of print data is generated, it can feed the paper one line and then print. be. That is, after printing one line, it is possible to place the print head above the printing line. Therefore, conventional electronic cash registers make use of the features of this dot printer to overprint a cancellation mark [------] on the sales data of the last-minute canceled item, making it clear that there has been a cancellation on the receipt. I was able to do it.

On the other hand, since a thermal printer using a line thermal head has a high printing speed, it can be considered to be used in an electronic cash register that requires high-speed printing. However, this type of thermal printer divides one line into several lines and prints on a line-by-line basis, so by the time printing for one line is completed, the head has already been sent to the first line of the next line.

[Problems to be Solved by the Invention] As described above, when a thermal printer having a line thermal head is used as a printer for receipts, etc., due to the mechanism of the printer, when printing for one line is completed, the next line is already printed. Because the head was moving, it was not possible to print a cancellation mark, etc. over the previous print data.

Overlapping printing is possible by feeding the paper in the opposite direction, but in this case, the feeding mechanism becomes complicated and the paper becomes loose, which tends to cause paper jams, which is not practical.

Therefore, the present invention provides an electronic printer that can print over the previous print data using a thermal printer with a simple configuration and a line thermal head without feeding the paper in the reverse direction, and that can increase the printing speed. It is intended to provide a cash register.

[Means for Solving the Problems] The present invention prints product sales data, total data, etc. obtained based on information regarding sales products inputted through an input unit onto thermal receipt paper using a line thermal head. In an electronic cash register, a printing mechanism such as a stamp is installed at a position several lines away from the line thermal head in the paper feed direction, and when an overprinting command for the previous print data is issued, this printing mechanism is operated to print a thermal receipt. It controls printing on paper.

[Function] In the present invention having such a configuration, when thermal receipt paper is fed line by line, the printing mechanism is provided at a position one line away from the line thermal head in the paper feeding direction. By doing this, when an overprinting command for the previous print data is generated, the corresponding print data is positioned at the printing position of the printing mechanism, so overlapping printing is performed by operating the printing mechanism.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In this embodiment, a case will be described in which a cancellation mark [----] is printed over the immediately preceding print data.

FIG. 1 is a block diagram of an electronic cash register. In the same figure, 1 is the CPU as the main body of the control unit, 2
3 is a ROM that stores program data and the like for the CPU to control each part; 3 is a RAM in which various memories are formed for registering sales data of each sales item. Further, 4 is a clock circuit that measures the current date and time, 5 is a display control circuit that drives and controls a display 6 for electronically displaying the amount of each product sold, the total amount, etc., and 7 is a clock circuit that measures the current date and time.
It inputs a selection signal from a mode switch 8 for selecting various business modes such as "registration", "payment", "setting", etc., and also outputs a drive signal to a drawer opening device 10 of a drawer 9 for storing cash, etc. I10 port, 11
13 is a keyboard circuit that receives input key signals from a keyboard 12 which has various keys such as 1 for a number key, 2 for a code key, 3 for a subtotal key, 4 for a total key, and a cancel key; 13 is a platen Pl; This is a printer drive circuit for a thermal printer 14 that includes a line thermal head P2, a cutter P3, a stamp P4, etc., and prints on heat-sensitive receipt paper.

The CPU 1 is connected to the ROM 2 and R via a pass line 15.
AM3, clock circuit 4, display control circuit 5, I10 port 7
, a keyboard circuit 11, and a printer drive circuit 13 are connected thereto.

FIG. 2 is a conceptual diagram showing the arrangement relationship of each component of the thermal printer 14. As shown in FIG. That is, a platen P1 and a line thermal head P2 are disposed to face each other with a thermal receipt paper R fed line by line in the direction of arrow F by a feed mechanism (not shown). Further, a stamp P4 is provided at a position one line away in the feed direction F from the printing position A on the thermal receipt paper R of the line thermal head P2, and the stamp P4 is placed opposite to the stamp P4 on the thermal receipt paper R. A stamp holder S is formed between the two. Furthermore, a cutter P4 for cutting the receipt R is provided near the receipt issuing port at a position several lines away from the stamp P4 in the feed direction F.

As shown in FIG. 3, the stamp P4 is made up of a plurality of rectangular heating elements M arranged in a row at predetermined intervals on the surface H that comes into contact with the heat-sensitive receipt paper R.
Power is constantly supplied through a power line C from a power source (not shown).

That is, by pressing this stamp 4 against the heat-sensitive receipt paper R, a cancellation mark C----] by the heating element M is printed on the receipt R.

The CPU is program-controlled so as to execute corresponding key processing in accordance with the manual input of various keys on the keyboard 12.

FIG. 4 is a flowchart showing the key processing when the number 2 is input to the code key. When the input of 2 to the code key is detected via the keyboard circuit 11, the first condition (" whether "registration" mode is selected, etc.)
Determine whether the requirements are met. If this condition is met, the number of products sold and the sales amount of the products belonging to the corresponding code are registered in the RAM 3. Further, the code and price of the sales data are given to the display control circuit 5 as display data to be displayed on the display 6, and also given to the printer drive circuit 13 as print data for one line, and sent to the line thermal head of the thermal printer 14. P2
Printing is performed on the thermal receipt paper R at the printing position A. Thereafter, a command is given to feed one line of the thermal line paper R, and this process is completed. Note that if the registration condition is not satisfied for inputting 2 to the code key, another condition is determined and the corresponding process is executed.

FIG. 5 is a flowchart showing the key processing when the number 3 is input to the subtotal key. The product is registered and the transaction has not been closed. If this condition is met, the subtotal amount of the transaction is calculated, and this subtotal amount is given to the display control circuit 5 as display data to be displayed on the display 6.
It is also given to the printer drive circuit 13 as printing data for a line, and printed on the thermal receipt paper R at the printing position A by the line thermal head P2 of the thermal printer 14.

Thereafter, a command is given to feed one line of the thermal line paper R, and this process is completed. Note that if the subtotal calculation condition is not satisfied for inputting 3 to the subtotal key, another condition is determined and the corresponding process is executed.

FIG. 6 is a flowchart showing key processing when 5 is input to the Cancel key. When the input of 3 to the Cancel key is detected via the keyboard circuit 11, first the condition that allows last-minute cancellation (the product registration has been carried out).

If this condition is met, the corresponding data registered in the RAM 3 is canceled, and the printer drive circuit 13 is commanded to drive the stencil P4 to print the cancellation mark [----]. and complete this process. Note that if the last cancellation condition is not satisfied when 5 is input to the cancellation key, another condition is determined and the corresponding process is executed.

In this embodiment configured in this way, the cutter P4
If the previous customer's receipt was cut and issued by
The sales data printing start position of the next customer's receipt is located at the line printing position A by the line thermal head P2. That is, in the receipt issuing example of FIG. 7, the line indicated by 11 in the figure is located at the printing position A1; In this state, enter 2 in the code key.
Department code ``1'' and sales amount rloO yen due to human effort.''
When product a is registered, line thermal head P2
Niyotte L/ Sheet Rl: r D P 1
” / 100 J is printed, and the receipt R is fed one line, and the next 22 lines are located at the print position A. At this time, the 11th line of print data rDP1 ¥1oo” is located at the print position of the stamp P4. do. Next, enter 2 in the code key to get the department code "2" and the sales amount r200.
When the product of "Yen" is registered, the line thermal head P
2, "FDP2 ¥200" is printed on the receipt R, and the receipt R is fed one line, and the next 23
The line is located at print position A. At this time, the 22nd line of print data FDP2 ¥200J is located at the print position of stamp P4.

Here, if a last-minute cancellation occurs, such as when a customer requests a return for a product, the operator inputs 4 into the cancellation key. Then, the stamp P4 is activated and a cancellation mark [:--1-] is printed on the 22nd line of the receipt R. In other words, on line 112, there is the print data of the product that was canceled just before.
1 will be printed overlappingly. At this time, receipt R
is not fed.

After that, product C with department code "3" and sales amount "300 yen" is registered using 2 in the code key, and then when 4 is used in the subtotal key and the total key is operated, the receipt shown in Figure 7 is issued. Ru. Therefore, the cancellation mark [--1-
1 will be printed over and over again to make it clear on the receipt which products were canceled at the last minute.

As described above, according to this embodiment, the paper feed direction F of the line thermal head P2 in the thermal printer 14 is
Stamp P where cancellation mark [-1--] can be printed on the side
4 with high precision, and operate this stamp P4 when a last-minute cancellation occurs. Even if the thermal printer 14 is applied to a receipt printer, the cancellation mark [[ -----] can be overprinted on the sales data of the corresponding canceled product. Therefore, since there is no need to feed the paper in the reverse direction for overlapping printing, there is no need for a special mechanism for this purpose, and there is no possibility that the paper will become loose due to reverse feeding and cause a paper jam. In other words, since a thermal printer having a line thermal head can be used as an electronic cash register printer, printing speed can be increased and processing efficiency can be improved.

In the above embodiment, a case has been shown in which the cancellation mark [----] is printed over the immediately preceding print data, but it goes without saying that the data to be overprinted is not limited to the cancellation mark. Furthermore, by providing the electronic cash register of the present invention with an inline interface, etc., it is possible to
Needless to say, it can be applied as a terminal for a point of sale (point of sale) system.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to perform overprinting on the previous print data using a thermal printer having a line thermal head with a simple configuration without feeding paper in the reverse direction. Accordingly, it is possible to provide an electronic cash register that can increase printing speed.

[Brief explanation of drawings]

The drawings are diagrams showing an embodiment of the present invention, in which Fig. 1 is a block diagram showing the overall configuration, Fig. 2 is a sectional view showing the schematic structure of a thermal printer, and Fig. 3 is a perspective view showing the structure of a stamp. 4 to 6 are flowcharts showing the main key processing of the CPU, and FIG. 7 is a diagram showing an example of issuing a receipt. 1...CPU, 2...ROM, 3...RAM, 1
2...Keyboard, K5...Cancel key 14...
Thermal printer, P2... line thermal head,
P4... Stamp, M... Heating element.

Claims (1)

[Claims] In an electronic cash register in which a line thermal head prints out product sales data, total data, etc. obtained based on information regarding sales items inputted through an input section on heat-sensitive receipt paper, paper feed from the line thermal head is performed. A printing mechanism provided at a position separated by several lines in the direction, and a printing control means for operating the printing mechanism to print on the thermal receipt paper when an overprinting command for immediately preceding print data is generated. An electronic cash register characterized by: