JPS5835303B2 - Product sales system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a product sales system that combines a weighing device and a cash register.

Conventionally, in this type of product sales system, once the weighing device weighs the data, the data is retrieved at the cash register and the weighing data is input, and even if there is a weight change in the weighing device, the cash register is input first. Registration processing could only be performed based on the above-mentioned measurement data.

For this reason, for example, when a customer buys two apples, calls the weighing data into the register, and then adds another apple, it is not possible to additionally weigh the added apple, and the customer cannot weigh the additional apple.
After completing the registration process for each apple, there was the trouble of having to weigh and register an additional apple.

Furthermore, even though one apple has been added, there is a risk of an erroneous operation in which the weighing data for two apples is treated as three apples and the registration process is performed.

This invention was devised to solve such a problem. When there is a weight change during weighing in a weighing device, the cash register immediately prohibits the registration process and waits for the re-input of weighing data. To provide a product sales system that allows only one registration process to be performed even when additionally purchasing a product, improves operability, and eliminates the risk of erroneous operation.

Furthermore, after waiting for the re-input of the weighing data, when the weighing value becomes stable in the weighing device, the weighing data can be re-inputted and registered at the cash register without having to be read, thereby further improving operability. The purpose is to provide a product sales system that can be improved.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a weighing device, 2 is an electronic cash register, and both are connected by a transmission cable 3.

The weighing device 1 is of a load cell type, for example, and consists of a weighing section main body 4, an operating section 5, and a display 6. The operating section 5 and the display 6 are attached to the cash register 2 side, and the operating section 5 and the display The measuring unit 6 and the measuring section main body 4 are respectively connected by transmission cables 7.8.

The cash register 2 has a top part (a customer display 9), a front upper part (a clerk display 10), a keyboard 11, a journal inspection window 12, a receipt issuing port 13 in the center of the front, and A drawer 14 is provided at the bottom.

The operating section 5 of the weighing device 1 is provided with a tare key 5a for performing tare weight subtraction processing, and the keyboard 11 of the cash register 2 is provided with numeric keys for inputting unit price data, single item data, etc. 11a, Department key 1 as a registration key for setting the department of the product and performing department registration
1b, a subtotal key 11c, a total key 11d1, a scale key 11e used to read measurement data from the weighing device 1, and the like.

FIG. 2 is a block diagram showing the circuit configuration of the measuring device 1.
Load cell 15, low pass filter 16, amplifier 17
, an analog-to-digital (AID) converter 18, a central control unit 19, a cash register interface circuit 20, an operating section/display interface circuit 21, the operating section 5, and the display 6.

When the object to be weighed is weighed in the weighing section main body 4, a voltage corresponding to the weight of the object to be weighed is output from the load cell 15, the voltage is noise-cut by a low-pass filter 16, and further amplified by an amplifier 17. /D converter 18.

This A/D converter 18 performs voltage-to-pulse conversion, and from this converter 18, pulse number data corresponding to the input voltage is supplied to the central controller 19 as measurement data.

The central control unit 19 outputs the input measurement data to the cash register interface circuit 20 and also to the display 6 via the operation section/display interface circuit 21.

Further, the central control device 19 stores the input weighing data as tare weight cancellation data when the tare weight subtraction key 5a is operated in the operation section 5.

The cash register 2 is intercepted by the weighing device interface circuit 22, the keyboard/display interface circuit 23, the printer interface circuit 24, the central control unit 25, the storage section 26, the printer 27, and the keyboard 1L display 9-10. ing.

When the scale key 11e is operated on the keyboard 11, the key signal is input to the central controller 25 via the interface circuit 23.

As a result, the central control device 25 requests the interface circuit 20 of the weighing device 1 to output weighing data via the interface circuit 22, and reads the weighing data from the weighing device 1 via the interface circuit 22. There is.

The loaded measurement data is then displayed on the displays 9 and 10 via the interface circuit 23.

In this state, when unit price and department settings are performed using the keyboard 11, the unit price setting data is first displayed on the display 9.
, 10, and then display the weighing data × according to the department settings.
Calculate price data by performing arithmetic processing on unit price data,
A registration process is carried out to cumulatively store the price data in the storage unit 26, such as by dividing it into sections, and the display unit 9.10
It displays the department code and outputs it to the printer 27 via the interface circuit 24.

Then, the printer 27 prints out the data on the journal and receipt together with the department code.

In addition, in the cash register 2, the scale key 1
When operating the number key 11a without operating 1e, single item data is input and in this state the department key 11b is pressed.
By operating , you can perform the registration process in the normal register.

FIG. 3 is a circuit diagram specifically showing the interface between the weighing device 1 and the cash register 2. The interface circuit 20 of the weighing device 1 includes eight inverters 2.
8 to 35.4 4-bit buffer registers 36 to 39
A two-person gate 40 is also provided.

Then, a ready signal r is output from the output terminal O8 of the central control device 19 via the inverter 28, and the output terminal O0
The weight fluctuation signal S is output from the inverter 29, and the output terminals 02 to 06 output the weight fluctuation signal S to each buffer register 36 to
Measurement data with each digit being 4 bits is outputted to 39, and a clock pulse C□ is outputted from output terminal 06 to each of the buffer registers 36 to 39 through a NOR gate 40.

Each of the buffer registers 36 to 39 outputs the output terminals 02 to 39 in synchronization with the clock pulse c14 from the output terminal 06.
Data starting from 0° is sequentially shifted and stored.

After the buffer registers 36 to 39 store the measurement data, when the clock pulse c2 is input from the cash register 2 via the inverter 34 and the NOR gate 40, the data is transferred to the respective inverters 30 to 39 in synchronization with the clock pulse c2. 33.

The weighing device 1 also receives the enable signal e from the cash register 2 through an inverter 35 to the central control device 1.
9 input terminal■.

I am trying to input it into .

Interface circuit 22 of the cash register 2
is provided with eight imparks 41 to 48 and an I10 port 49, and this I10 port 49 is connected to the central controller 2.
Data is exchanged with the PC 5 via a data bus and an address bus.

and the input terminal I of the I10 port 49.

The ready signal r from the weighing device 1 is inputted via the inverter 41 to the input terminals ■□, and the weight fluctuation signal S from the weighing device 1 is inputted to the input terminals ■□ via the inverter 42, and the input terminals ■2 to ■.

The measurement data from the measurement device 1 is inputted bit by bit through inverters 43 to 46, respectively.

Further, the aforementioned clock pulse c2 is outputted from the output terminal O8 of the aforementioned I10 port 49 to the aforementioned measuring device 1 via the inverter 47, and the aforementioned enable signal e is output from the output terminal O□ to the aforementioned measuring device 1 via the inverter 48. I am trying to output it.

FIG. 4 is a flowchart showing the processing of the central control unit 19 of the weighing device 1. When started by turning on the power, first a segment check of its own display device 6 is performed.

This segment check is performed by sequentially scanning all digits from 0 to 9.

Next, perform key processing. When a tare weight subtraction operation is being performed on the operation section 5', processing for tare weight cancellation is performed.

Next, it is checked whether the A/D converter 18 is busy (in operation).

This is because when the A/D converter 18 is busy, the measurement data is not determined and cannot be read.

If A/D converter 18 is not Busy, A/D converter 1
Read the weighing data from 8.

Next, check whether there is a change in weight.

If there is a weight change, a weight fluctuation signal S is set and an internal weight stabilizing FF (flip-flop) is reset.

Also, if there is no weight change, the weight is stable F. Set F.

Next, perform auto-zero processing. This is a process that digitally corrects the movement of the zero point due to temperature changes.

Next, tare weight subtraction processing is performed.

This is a process of subtracting tare data from the read weighing data to calculate the net weight.

Next, a zero suppression process is performed to suppress the display to zero, and then a display change process is performed to change the display data on the display 6 to the newly read measurement data.

Next, it is checked whether or not there is an input of the enable signal e from the cash register 2, and if there is no input, the process returns to the above-described key processing again.

If there is an input, then check whether the weight is stable by checking the status of weight stability F and F.

If the balance is not stable, the process returns to the above-mentioned key processing, and if the balance is stable, the transmission of the weighing data to the cash register 2 is started.

Then, the weight fluctuation signal S is reset and the process returns to the key processing described above.

The data transmission and weight fluctuation signal S reset processing in this flowchart H will be described in more detail as shown in the flowchart of FIG.

That is, the central control unit 19 first outputs the first digit 4-bit data from the output terminals 02 to 05, and then outputs the clock pulse C□ from the output terminal 06 to send the first digit 4-bit data to each buffer register 36. ~39 is input to the first stage.

Next, the 2nd digit 4-bit data is output from the output terminals 0□ to 05, and then the clock pulse C□ is output from the output terminal 06 to shift each of the buffer registers 36 to 39 by one digit, and the data is shifted to the second digit. The 4-bit data is input to the first stage of each of the buffer registers 36-39.

Next, output terminals 02-0. The 4-bit data of the 3rd digit is outputted, and then the clock pulse C□ is outputted from the output terminal 0 to shift each of the buffer registers 36 to 39 by 1 digit, and the 4-bit data of the 3rd digit is transferred to each of the buffer registers. 36
~39 is input to the first stage.

Next, the 4-bit data of the fourth digit is output from the output terminals 02 to 05, and then the clock pulse C□ is output from the output terminal 06 to shift each of the buffer registers 36 to 39 by one digit. Transfer bit data to each buffer register 3 above.
Input the first stage ζ from 6 to 39.

In this way, the measurement data consisting of four digits is stored in each buffer register 36-39.

In this state, the weight fluctuation signal S is then reset and a ready signal r is output from the output terminal O6.

Next, it is checked whether or not there is an input of the enable signal e from the cash register 2 side, and this state is maintained as long as there is input, and when there is no input, the ready signal r is reset.

FIG. 6 is a flowchart showing the processing of the central control unit 25 based on the operation of the scale key 11e on the keyboard 11 of the cash register 2. When the scale key 11e is operated, first the weighing data loading area (memory) is cleared.

Next, the enable signal e is outputted from the output terminal 01.

And then the input terminal ■.

It is checked whether there is input of ready signal r.

If the ready signal r is not input even after a certain period of time has elapsed after the enable signal e was output, error processing is performed.

When the ready signal r is input within a certain period of time, the clock pulse c2 is outputted from the output terminal Oo, the buffer registers 36- and -39 are shifted by one digit, and the first digit data is transferred to the input terminal 2. ~■, through the I10 port 49.

Next, two white clock pulses c2 are outputted from the output terminal O6 to retrieve the second digit data, and then three white clock pulses c2 are outputted from the output terminal O8 to retrieve the third digit data. Furthermore, the fourth clock pulse c2 is outputted from the output terminal O8 to read the fourth digit data.

In this way, 4-digit weighing data is input.

In this state, the sense flag for the next ζ weight fluctuation signal is set in a specific area in the storage section 26 and provided for the weight fluctuation signal S from the weighing device 1.

In other words, timer interrupt processing, which will be described later, can be performed only when the sense flag of the weight fluctuation signal is set.

Next, a process of resetting the weight fluctuation signal flag set in a specific area in the storage unit 26 and a process of stopping the output of the enable signal e are performed.

Then, a scale lamp (not shown) provided corresponding to the scale key 11e is turned on, and the read-in measurement data is displayed on the displays 9 and 10.

When the weight fluctuation signal sense flag is set, timer interrupt processing is performed, and this processing is performed based on the flowchart shown in FIG.

That is, if the weight fluctuation signal sense flag is set, it is first checked whether or not the weight fluctuation signal S is input.

When the input of the weight fluctuation signal S is checked, a weight fluctuation signal flag is set.

FIG. 8 is a flowchart showing a key input wait routine in the cash register 2, and this routine has a function of forming a weighing data reading means.

That is, when there is no key manual power, it is always checked whether the weight fluctuation signal flag is set, and if the flag is set, the next scale key processing is performed in the same way as when the scale key 11e is operated. There is.

Therefore, to summarize the flowcharts in FIGS. 6 to 8, when the weight fluctuation signal S is input from the weighing device 1 after reading the weighing data from the weighing device 1, the weight fluctuation signal flag is set by the timer interrupt. This allows scale key processing to be restarted and new measurement data to be read in without operating the scale key ie again.

FIG. 9 is a flowchart showing a registration process based on reading of weighing data in the cash register 2. If this registration process is performed while the weight fluctuation signal flag is set, an error process is immediately performed.

In other words, this function first resets the sense flag of the weight fluctuation signal when the weight fluctuation signal flag forming the error processing means is not set, and then compares the set unit price data with the loaded weighing data. Multiplication processing is performed, and then rounding processing is performed on the calculated price data.

Then, memory processing is performed to accumulate the obtained price data in the storage unit 26 by dividing it into sections, etc., followed by display processing to display it on the displays 9 and 10, and finally, the printer 27 is used to print journals and receipts. Print processing is performed to print out the image.

FIG. 10 is a timing chart showing the output timing of the weight fluctuation signal s1 enable signal e, ready signal z, clock pulse c2, and weighing data, in which the ready signal r is output at the timing when the weight fluctuation signal S is reset;
When the enable signal e is output, the ready signal r
When the clock pulse c2 is output, the measurement data is loaded.

When the reading of the measurement data is completed, the output of the enable signal e is stopped, and the output of the ready signal r is stopped by the stop of the output of the enable signal e.

Also, if the weight fluctuation signal S is input while the weight fluctuation signal sense flag is set, the weight fluctuation signal flag will be set and the scale key processing will be performed again. After the output of the enable signal e, the enable signal e is output.

Even if the cash register 2 reads the weighing data from the weighing device 1 in this way, if a weight change occurs in the weighing device 1 after that, the cash register 2 sets the weight change signal flag to prohibit the registration process, and then reads the new weighing data again. For example, even if two apples are weighed and one apple is added after that, the data for three apples can be retrieved as weighing data, so the registration process would be for three apples. This can be done all at once, improving operability.

Also, since the registration process cannot be performed using the measurement data for two apples, there is a risk of erroneous operation in which the registration process is performed using the measurement data for two apples even though three apples have been weighed. There isn't.

Furthermore, the cash register 2 automatically loads new weighing data after a weight change after the weighing value in the weighing device 1 has stabilized and the weighing fluctuation signal S has been reset without having to operate the scale key 11e again. This allows us to further improve operability.

Next, another embodiment of the invention will be described with reference to the drawings.

Note that the same parts as in the above embodiment are given the same reference numerals, and detailed explanations will be omitted.

As shown in FIG. 11, the central control device 19 of the weighing device 1 includes an input terminal (2).

- I3 and an output terminal O8-04 are used, and the interface circuit 20 includes four photocouplers 50 to 53 and five inverters 54 to 58.
I am using something consisting of.

Also, an input terminal (2) serves as the central control unit 25 of the cash register 2.

~ ■4 and output terminals 06-03 are used, and as the interface circuit 22, five photocouplers 59-63 and four inverters 4-67 are used.
I am using something consisting of.

And the metering device 1 is connected to the output terminals O6-0 of the central control device 19.
Three to four-bit weighing data, a ready signal, a digit change signal, and an end signal are supplied to the light emitting diodes of photocouplers 59 to 62 of the cash register 2 via inverters 54 to 57, respectively.

And in cash register 2, photocouplers 59 to 62
Each of the signals is inputted through the phototransistor at the input terminal ■.

~ ■ I am trying to input it in 3.

In this case, the BCD code 0 to 9 codes are used for the weighing data, the BOD code D code is used for the ready signal, and the BCD code E code is used for the digit change signal.
The A code of the BOD code is used for the end signal.

In addition, the weighing device 1 supplies the weight fluctuation signal S from the output terminal 04 of the central control device 19 via the inverter 58 to the light emitting diode of the photocoupler 63 of the cash register 2. The signal S is input to the input terminal 4.

The cash register 2 sends two types of check signals and enable signals of 4 bits from the output terminal 0°-03 of the central control device 25 to the light emitting diodes of the photocouplers 50 to 53 of the weighing device 1 via inverters 64 to 67, respectively. We are trying to supply each.

In the measuring device 1, each of the signals is inputted to an input terminal I through phototransistors of photocouplers 50 to 53.

~ ■ I am trying to input it in 3.

In this case, one check signal uses BOD code A code, and the other check signal uses BCD code B code.
code is used, and the C code of the BOD code is used for the enable signal.

The interface control process of the central control unit 19 of the weighing device 1 configured as described above is performed based on the flowchart of FIG. 13.

That is, when weight stability is checked, the weight fluctuation signal S is reset and a ready signal (CD code) is output first.

In this case, before the weight stability check, the cash register 2
It goes without saying that it has already been checked that an enable signal (C code) is input from the .

Next, it is checked whether a check signal (A code) is input from the cash register 2, and if it is determined that there is an input, a digit change signal (E code) is output.

Next, it is checked whether a check signal (B code) is input from the cash register 2, and if it is determined that there is an input, the counter N is set to 1 and the first digit data is output.

Then, it is checked again whether or not the check signal (A code) is input, and if it is determined that there is input, the digit change signal (E
code) again.

Then, it is checked again whether or not the check signal (B code) is input, and when it is determined that there is input, the counter N is counted up by one and the second digit data is output this time.

This process is repeated until the counter N reaches 4 and the 4th digit data is output. After the 4th digit data is output, the check signal (A code) is checked and the digit change signal (E code) is output. After outputting and checking the check signal (B code), an end signal (A code) is finally output to end the transmission of the measurement data.

The timing of the output data from the weighing device 1, the weight fluctuation signal S, and the output data from the cash register 2 in the above process is shown in FIG. 12.

In this way, various signals other than the weight fluctuation signal S can also be transmitted in a 4-bit data configuration.

Of course, even in this case, the same effects as in the embodiment described above can be obtained.

Furthermore, the system shown in FIG. 14 is the same as the weighing data by omitting the dedicated transmission line for the weight fluctuation signal S from the embodiment shown in FIG. The signals are output from output terminals 02 to 05 of the central control device 19.

In this device, as shown in the flowchart in FIG. 18, when a weight change occurs, a 4-bit weight change signal (B code) is first output, and the weight change signal is transmitted from the output terminal 06 to five clock pulses C□ is outputted and supplied to each buffer register 36 to 39 to reset the weight stability F and F.

Note that this device then outputs four clock pulses C□ from the output terminal 06 to each buffer register 36 to 39.
will now supply weighing data to.

FIG. 15 is a timing chart showing the timing of each signal and each data in this embodiment, and shows the clock pulse for transferring the measurement data from the measurement device 1 (thereby, the measurement data is supplied to each buffer register 36 to 39). From each buffer register 36 to 39 to cash register 2
The weight fluctuation signal of the B code is now supplied to the B code.

Of course, the output timing of the ready signal r in this case is after the weight fluctuation signal is completely supplied to the cash register 2.

In the device provided with the buffer register in this manner, the weight fluctuation signal can be transmitted as a 4-bit data structure using the same transmission line as the weighing data.

Note that, of course, the same effects as in the above embodiment can be obtained in this case as well.

Furthermore, the system shown in FIG. 16 is the same as the weighing data by omitting the dedicated transmission line for the weight fluctuation signal S from the embodiment shown in FIG. Output terminal O8- of the central control device 19
It is designed to be output from 03 onwards.

In this device, as shown in the flowchart of FIG. 19, when a weight change occurs, a 4-bit weight change signal (B code) is output to reset the weight stability F, F.

FIG. 17 is a time chart showing the timing of each data in this embodiment.

In this way, even if the buffer register is not provided, the weight fluctuation signal can be transmitted as a 4-bit data structure using the same transmission line as the weighing data.

Note that, of course, the same effects as in the above embodiment can be obtained in this case as well.

Note that in the case where a buffer register is provided, the buffer register may be provided in the interface circuit of the cash register.

As described in detail above, according to the present invention, when there is a weight change during weighing in the weighing device, the cash register immediately inhibits the start of registration processing and waits for re-input of weighing data. Even if weight fluctuations occur due to the purchase of additional items to be weighed, operability can be improved by registering the weighing data after the change once, and even if weight fluctuations occur, registration processing using incorrect weighing data can be avoided. It is possible to provide a product sales system that is free from the risk of causing erroneous operations.

Further, according to the present invention, it is possible to provide a product sales system that can further improve operability since there is no need to carry out a calling operation at the cash register in order to re-input new measurement data after a change.

[Brief explanation of drawings]

Figures 1 to 10 show an embodiment of this invention.
Fig. 1 is a perspective view showing the external appearance, Fig. 2 is a block diagram showing the circuit configuration, Fig. 3 is a circuit diagram showing the interface between the weighing device and the cash register, and Figs. 4 and 5 are the interface of the weighing device. Flowcharts showing control processing; FIGS. 6, 7, and 8 are flowcharts showing cash register interface control processing;
The figure is a flowchart showing registration processing based on cash register measurement data, Figure 10 is a timing chart of various signals and data in interface control,
11 to 19 show other embodiments of the present invention, and FIG. 11, FIG. 14, and FIG. 16 are circuit diagrams showing the interface between the weighing device and the cash register, and FIG. Figures 15 and 17 are shown in Figure 1 above, respectively.
1, 14, and 16; FIG. 13 is a flowchart showing interface control processing of the weighing device in the circuit shown in FIG. 11; FIG.
19 are flowcharts showing the weight fluctuation processing of the weighing device in the circuits shown in FIGS. 14 and 16, respectively. 1...Measuring device, 2...Cash register, 3...Transmission cable, 11...
・Keyboard, 11e...Scale key, 19
, 25... central control unit, 20... cash register interface circuit, 22...
...Interface circuit for weighing equipment.

Claims (1)

[Claims] 1. Registered as a measuring device that weighs an object to be weighed, outputs a weight fluctuation signal while the weight is fluctuating, and stops outputting the weight fluctuation signal when the weight stabilizes and outputs weighing data. Cash registers that perform arithmetic processing and registration processing on input data through key operations are connected by connecting signal lines between their respective interfaces, and the weighing data output from the weighing device is scaled in the cash register. In a product sales system that calls the cash register through the signal line in response to a key operation, the cash register has a flag set in response to the call in of weighing data by the scale key operation, and a flag is set in the cash register by the registration key. A sense memory for a weight fluctuation signal whose flag is reset in response to the start of the registration process of the weighing data, and a flag is set when a weight fluctuation signal is input from the weighing device when the flag is set in this sense memory, and The present invention is equipped with a weight fluctuation signal memory in which a flag is reset when reading weighing data by operating the scale key, and an error processing means that handles an error if a registration key is manually applied when the flag is set in the weight fluctuation signal memory. Featured product sales system. 2. The product sales system according to claim 1, wherein the weight fluctuation signal is transmitted from the weighing device to the register using a dedicated signal line. 3. The product sales system according to claim 1, wherein a signal line for transmitting weighing data is also used to transmit weight fluctuation signals from the weighing device to the register. 4. Claims 1 and 2, characterized in that the weighing device is provided with a buffer register in the interface, and the weighing data is transmitted via the buffer register to a signal line for transmitting weighing data. or third
Product sales system described in section. 5. Sales of products according to claim 1, 2, or 3, characterized in that the cash register is provided with a buffer register in the interface, and metering data is read through the buffer register. system. 6. A weighing device that weighs the object to be weighed, outputs a weight fluctuation signal while the weight is fluctuating, stops outputting the weight fluctuation signal when the weight stabilizes, and outputs the weighing data, and input data by operating the registration key. The cash registers that perform arithmetic processing and registration processing are connected by connecting signal lines between their respective interfaces, and the weighing data output from the weighing device is sent to the cash register in response to the scale key operation on the cash register. In a product sales system that calls and processes the cash register through a signal line, the cash register sets a flag in response to the scale key operation (in response to the call for weighing data), and registers the weighing data using a registration key. There is a sense memory for the weight fluctuation signal whose flag is reset in response to the start of processing, and when the flag is set in this sense memory, the flag is set when the weight fluctuation signal is input from the weighing device, and when the scale key is operated. A weight fluctuation signal memory whose flag is reset when reading weighing data, an error processing means that handles an error when there is a registration key when the flag is set to the weight fluctuation signal memory, and a flag set to the weight fluctuation signal memory. What is claimed is: 1. A product sales system comprising: a metric data loading means for automatically loading metric data from the above-mentioned weighing device by a loading process similar to that when operating the scale key.