JPS6039972B2 - Printer print control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a print control circuit for a printer that allows a printer to continuously print various data such as undefined weight and price output from a weighing machine in response to a certain print command signal.

In recent years, in the supermarket distribution industry, pos (poi)
ntofsale) system is attracting attention and becoming popular. This is the weight of non-quantitative products such as meat and vegetables. This is a system in which prices, etc. are coated and displayed on labels, for example with barcodes, and the barcodes on the labels are electronically read with a light ben, etc., and the information is processed immediately at the point of sale using a computer. That's true. The barcode used in this system is coated, for example, as shown in FIG. 1, and this barcode A is printed on a label by a barcode printer. In other words, data such as weight and price output from a weighing machine that weighs products is transferred to a well-known bar code.
By inputting data to a barcode printer, the barcode printer converts each piece of data into a code and prints it sequentially. By the way, the above-mentioned POS system has the effect of speeding up office processing, etc., and is expected to do so.Therefore, the process of weighing products and printing their barcodes is also required to be quick and efficient.

Therefore, an appropriate control mechanism and time efficiency are strongly required between weighing each of a plurality of products and printing each bar code for that product. The present invention has been made in response to the above requirements, and the first aspect of the present invention is to detect a stationary judgment circuit signal and a normal weight signal from measured weight data from a weighing machine, and to control the operation of the printer using these two signals. Provides a printing control circuit for controlling. Further, the second invention provides a printing control circuit that makes effective use of a weighing machine and a printer by using a buffer register for transmitting and receiving measurement data, etc., and the third invention provides a printing control circuit that makes effective use of a weighing machine and a printer. To provide a printing control circuit that connects the two and effectively moves both. The present invention will be explained step by step as follows. As described above, the first aspect of the present invention utilizes the stationary determination signal and the normal weight signal.

This latter regular weight signal determines whether the weight data from the weighing machine is not a negative weight, and even if it is a positive weight, it is greater than a certain weight (explained in the circuit below)
After that, the logic level "1" is output at a predetermined weight data point. The stationary determination signal is output as a logic level "1" when the measurement data from the weighing machine becomes stable, and an example of its detection circuit is shown in FIG. That is, in FIG. 2, 1 and 2 are J-K flip-flops, and 3
, 4 are inverters, 5, 6, 7 are NAND circuits, and 8 is a mono multivibrator, from which a stationary determination signal a is outputted from an output Q via an inverter 9.

A weight addition pulse (hereinafter abbreviated as P-) and a weight subtraction pulse (hereinafter abbreviated as P-) as weight data from a weighing machine are connected to each clock terminal c of the flip-flop 2. And each of these flip-flops -, 2 outputs Q,...
On the other hand, the adder circuit flip-flop 1 has its output Q,' cleared by a signal obtained by inverting P- by the inverter 3. Similarly, the output Q2 of the other subtracting flip-flop 2 is cleared by a signal obtained by inverting P+ by the inverter 4. Next, flipflop 1
The outputs Q and P0 of the flip-flop 2 are input to the NAND circuit 7 via the NAND circuit 5, and the outputs Q2 and P- of the flip-flop 2 are input to the NAND circuit 7 via the NAND circuit 6, and the output of the NAND circuit 7 t is input to a retrigger type mono multivibrator 8. As can be seen from the waveform diagram of FIG. 3, the operation of the stationary determination circuit 10 shown in FIG. 2 is such that the stationary determination signal a is output from the point at which the weight data becomes stable. That is, when continuous P+ or P- is input, the input trigger pulse t of the mono multivibrator 8 is output in synchronization with each P+ and P-, but the scale of the weighing machine is in a stable state. When the scale approaches the predetermined weighing weight and flickers at the first plus/minus time, that is, one P+ and one P- appear alternately, or the scale becomes completely stable and P10 and P- no longer appear. In this case, the trigger pulse t will not be generated. Then, the output Q3 of the mono-multivibrator 8 becomes logic level "0" after the set time, and this output Q3 is inverted by the inverter 9 to output a standstill determination signal a of logic level "1". In this way, the stationary judgment signal a indicates that the scale is in a stable state (including the plus or minus first flickering state).
is entered and output after a certain period of time. The key point of the first invention is to input and control various data of the weighing machine using the above-mentioned stationary determination signal a and the above-mentioned normal weight signal to the barcode printer. An example of application of the first invention and an example of application of the buffer register, which is the point of the second invention, will be described next with reference to the embodiment in FIG. This fourth
In the figure, 11 is a weighing machine, 10 is the stationary judgment circuit shown in FIG. 2, and 12 is a normal weight judgment circuit, the output of which becomes the above-mentioned normal weight signal b. Also, 16 is a buffer register, 19
is a barcode printer, and the buffer register 6 receives data from the weighing machine 11 and latches it, and sends the latched data to the barcode printer 19 to print the barcode. The operation is performed as described in the following FIG. 4. That is, in FIG. 4, the stationary judgment circuit 10 is activated by P+ and P- output from the weighing machine 11, and at a certain point, the stationary judgment signal a becomes AND.
input to circuit 13; On the other hand, the regular weight determination circuit 12 determines whether the measured weight data from the weighing machine 11 is a regular weight that will be printed on the printer. For example, this is used for the deviation of the balance point of the scale in the weighing machine 11. In order to determine whether the data is close to the current value, it is determined whether the measured weight data is not a negative weight, and even if it is a positive weight, it is greater than a certain weight.
” is output to the AND circuit 13. Therefore, the AND circuit 13 outputs a logic level “1” by inputting both the signals a and b, and this output is output to the differentiating circuit 14.
The signal is inputted to the set terminal s of the flip-flop 15 via the flip-flop 15. When a signal is input to the set terminal s of this flip-flop 15, the output Q4 becomes a logic level "1", and when a signal to be described later is input to the reset state R, the output Q4 becomes a logic level "0". In the end, the flip-flop 15 immediately outputs the output Q4 as "1" only when the weight data of the scale is stable and the weight is a predetermined weight. flip flop 1
The output Q4 of 5 is connected to one input of the next AND circuit 24, and the other inputs of this AND circuit 24 are connected to a printing signal generation circuit 20 and a label skip signal generation circuit 2, which will be described later.
Both outputs from 1 are connected.

The output of the AND circuit 24 then enters the buffer register 6, where it generates a data latch pulse. That is,
To summarize the above, only when the weighing machine is stabilized at a predetermined weight and the printer is not printing or label skipping, the measured weight data etc. are instantaneously latched into the buffer register 16, and the next data latch signal is Data is latched until output. Next, when data latching in the buffer register 6 is completed, a printer print command signal 1 is sent to the barcode printer 19 via the data transfer completion signal generation circuit 17 and the print command generation circuit 18.

And the barcode printer 19 has a buffer register 1
Printing starts according to the latch data from 6. On the other hand,
The output of the data exchange completion signal generating circuit is connected to the reset terminal R of the IJ flip-flop 15, so the output Q4 of the flip-flop 15 is reset by the input of the data exchange completion signal. That is, the output Q4 of the flip-flop 15 is set by the output of the AND circuit 13 which receives both the outputs of the stationary judgment circuit 10 and the normal weight judgment circuit 12, that is, the weight measurement completion signal, and is reset by the data exchange completion signal. Therefore, for example, if a lamp is displayed on the weighing machine in Koniseki Q4 and the next weighing is prohibited while the lamp is on, the next weighing can be carried out while the printer is printing, and its full potential can be utilized. Also, when the barcode printer 19 is printing, a signal of logic level "1" is output from the printing signal generation circuit 20, and a signal of logic level "1" is sent to the
This signal is input to the ND circuit 24 as a signal C during printing. At the same time, even during label skipping, the label skip signal generation circuit 21
A signal of logic level "1" is inputted to the AND circuit 24 via the inverter 23 as the label skipping signal d. Therefore, during printing or label skipping, the AND circuit is inhibited (output "0") and the data in the buffer register 16 is not latched. In this way, data input to the buffer register 16 is prohibited while the barcode printer 19 is printing, and the weighing machine 11 is caused to perform the next weighing during this time.

In addition, it can be seen that the weighing machine 11 and the barcode printer 19 can be fully utilized through the buffer register 16 by causing the barcode printer 19 to perform the next printing in response to a printer print completion signal, a computer stability signal, etc. . The above are embodiments of the first and second inventions, and the following third invention is an application of the first and second inventions to a plurality of weighing machines. The third invention will be explained. Figure 5 shows n weighing machines 11-, 11-
2...11-n to one barcode printer -19
A block diagram is shown in which each weighing machine 11-1,
11-2...This is a circuit that sequentially switches the data from 11-n and prints it on the printer.

The main operating point of this circuit is the scan signals S,,S2・
...Sn, its configuration and operating procedure will be explained below. 29 in FIG. 5 is a scanner signal generation circuit for scanning. By inputting the check signal f, the scan signals S, , S2, . . . , Sn are sequentially moved from S, to Sn. That is, as shown in the figure, in order to sequentially scan the weighing machine signals, the scanning clock signal f is input to one input of the AND circuit 28, and the other input is connected to the flip-flop 15.
The output Q4 of is inputted via the inverter 27. Therefore, when the output Q of the flip-flop 15 is at the logic level "1", the scan clock signal f is prohibited from being input to the scanner signal generation circuit 29 via the AND circuit 28, and the scanner signal generation circuit 29 is stopped. keep. Then, when the printer completes printing, the next data is stored in the buffer register 16.
When the latch is completed and the flip-flop 15 is reset, the scan clock signal f passes through the AND circuit 28 and enters the scanner signal generation circuit 29, and the scan signals S,, S2...Sn change to S, → It outputs in the Sn direction. These scan signals S,, S2...Sn are transmitted to each weighing machine 1 1-1, 11-2, . . . as shown in the figure.
Respective stationary determination circuits 10-1, 10 corresponding to 11-n
-2...101n and regular weight discrimination circuit 12
-1, 12-2...12-n, each NAND circuit 30-1, 30-2,...
. . . is input corresponding to 30-n. Each of these NAND
The outputs of the circuits 30-1, 30-1, 30-1, . Separately, the scan signals S,, S2...Sn are the weighing machines 11-1, 1.
1-2..., 1-n as well as the corresponding NAND circuits 25-1, 25-2...25
-n respectively, and this NAND circuit 25-1
, 25-2...25-n output is inverter 2
6, and accordingly, the data of the weighing machine corresponding to the scan signals S,, S2, . . . , Sn are input to the buffer register 6. That is, to summarize, the flip-flop 15 is activated by the stationary judgment/regular weight judgment signals of each weighing machine 11-1, 11-2...11-n corresponding to the scan signals S,, S2...Sn. When the weighing machines 111x that are set sequentially and corresponding to the scan signal Sx are in an unstable state, they are skipped and sequentially moved to the next scan signal Sx+1, and this operation is repeated. In this way, multiple weighing machines are sequentially changed to print on the printer. Incidentally, although the above description has been made regarding a positive logic circuit configuration, it is obvious that a negative logic circuit configuration may be used.

In this case, the logic level "1" becomes a logic level "0", and the logic level "0" becomes a logic level "1". Further, the circuit configuration in each drawing shows a basic block diagram, and it is clear that the present invention is not limited to this circuit configuration and includes other modified circuits. As explained above, the first aspect of this invention is
According to the invention, the barcode printer's printing is controlled by the weighing machine's stationary judgment signal and the normal weight signal, so the barcode printer's printing is always performed in a stable and accurate state, and printing errors can be reduced. .

According to the second invention, data input to the buffer register is prohibited while the bar code printer is printing, causing the weighing machine to perform the next weighing, and the bar code printer is configured to input data from the buffer register by a printing completion signal from the printer, etc. Since the data is printed, the printing ability of the barcode printer can be effectively utilized. Furthermore, since both the weighing machine and the barcode printer can be fully utilized, there is no waste in mechanical operations, and an extremely efficient system can be provided. Furthermore, according to the third aspect of the invention, one barcode printer can process data from a plurality of weighing machines, making it possible to use it for multiple purposes. Therefore, the investment efficiency etc. by introducing a POS system is significantly improved, and it is extremely effective when processing a large amount of product data.

[Brief explanation of the drawing]

FIG. 1 is a code diagram of a specific example of a barcode by a known POS system, FIG. 2 is a circuit diagram showing an embodiment of a circuit that outputs the stationary determination signal a according to the first invention, and FIG. FIG. 4 is a circuit diagram showing an embodiment of the second invention, and FIG. 5 is a diagram of main parts showing an embodiment of the third invention. A...Barcode, a...Stationary judgment signal,
b...Regular weight signal, 10...Stationary judgment circuit, 11, 11-1, 11-2...
11-n...Weighing machine, 12...Regular weight determination circuit,
16...Buffer register, 19...Barcode printer, SI, S2...Sn...
scan signal. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A trigger that is triggered by a weight addition pulse and a weight subtraction pulse generated by the movement of a scale of a weighing machine, and outputs a stationary determination signal when the trigger is not continuously triggered for a set time. It is equipped with a stationary judgment circuit consisting of a trigger-type mono-multivibrator, and a normal weight judgment circuit that outputs a normal weight signal when the measured weight data from the weighing machine is a positive weight and is more than a certain weight. 1. A printing control circuit for a printer, characterized in that when both outputs from a stationary judgment circuit and a normal weight judgment circuit are generated, various data from a weighing machine are controlled to be input to the printer. 2. The printing control circuit according to claim 1 includes a buffer register that sends and receives various data from the weighing machine and outputs the data to the printer, and a printing-in-progress signal generation circuit that detects when a label is being printed. and a label skip signal generation circuit for detecting when a label is being skipped;
1. A print control circuit for a printer, characterized in that a buffer register is controlled by output signals from each circuit of a label skip signal generation circuit, and various data from a weighing machine are inputted into a printer. 3. In the printing control circuit according to claim 2, a scanner signal generation circuit is provided for scanning a plurality of weighing machines and various data from the weighing machines, a stationary determination signal, and a regular weight signal, and the circuit 1. A printing control circuit for a printer, characterized in that a weighing device for printing is sequentially switched according to the following.