JPS5813857B2 - denshihakarinirendoshita injisouchino injiseigiyokairo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing control circuit for a printing device such as a printer, a recording machine, etc. that is linked to an electronic scale.

The scope of use of scales is determined by the Measurement Act, and they cannot be used to prove transactions beyond weighing.

In addition, according to the same law, for electronic scales, when weighing more than the weighing value, 5% of the weight (if this 5% exceeds 50 scales, 50
The weight display must be 0 g or the weight display tube must be turned off within the following interval.

In other words, for example, an electronic scale with a weighing capacity of 2 kg and a minimum scale of 2 g has a weight of 2 kg.
The weight display must be set to 0g or the light goes off between 000g and 2100g.Actually, considering the tare weight, for example, the weight display should be set to 0g or the light goes off from 2050g. I have to.

Therefore, for example, when an item weighing 2020g is weighed using an electronic scale with a weighing capacity of 2kg, the weight of 2020g will be displayed, and the weight, unit price, price, etc. of the item will be displayed on a label or recording paper using a printing device connected to the electronic scale. However, as mentioned above, this electronic scale cannot be used as proof of transaction for items that exceed the weighing capacity.

Also, if the weight exceeds the weighing limit, the weight will be displayed by subtracting the weighed amount.In other words, with an electronic scale with a weighing capacity of 2 kg, 2020.
Electronic scales are also used that display a weight of 20g when weighing the item No. 9, and therefore a price corresponding to 20g. When the printing device is operated on such an electronic scale, the label or The weight of 20 g, the unit price, and the price corresponding to the weight of 20 g are also printed on the recording paper.

As a result, there is a risk that products with labels with inaccurate numerical values printed on them may be sold on the market, and there is also a drawback that the record tally may also be inaccurate.

This invention improves and eliminates the drawbacks mentioned above, and uses a simple circuit configuration to prevent the printing device from performing a printing operation when an item larger than the weighing amount is weighed, thereby allowing the electronic scale to be used properly. It is intended to be done.

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

1 is a weight counter, which includes a counter 2 that counts the 1st digit, a counter 3 that counts the 10th digit, a counter 4 that counts the 100th digit, and a counter that counts the 1000th digit. 5 are connected in series.

Then, a unit weight pulse 6 is connected to the counter 2 of the first digit.

7 is a latch circuit which receives a predetermined code output 8 from among the code outputs of the weight counter 1 as an input.

In other words, the upper limit for weighing above the weight is usually about 10% of the weight, so if the weight is 2 kg, it is possible to weigh up to 2200, so the code for counter 5 of 2 in the 1000th digit is output. may be connected to the latch circuit 7.

If the weight is 3 kg, the AND output of code outputs 1 and 2 of the counter 5 may be connected to the latch circuit 7.

9 is a NAND circuit, and the quantitative lock signal 1 is applied to its input.
0, weight discrimination signal 11 and price calculation end signal 12-3
The output of this NAND circuit 9 is connected to the latch circuit 7.

The quantitative lock signal 10 is an activation signal for a so-called flicker prevention circuit (not shown) that prevents the weight display from flickering.If the switch is turned on and this circuit is activated, the quantitative lock signal 10 will be H”.

Also, the weight discrimination signal 11 is "H" when the weight is 0 g or more;
When it is zero g or less than zero g, it becomes “L” and calculation end signal 1
2 becomes "H" when the calculation is completed.

The output of the latch circuit 7 is connected to the input of a NOT circuit 13, the output of the NOT circuit 13 is connected to one input of a NAND circuit 14, and the print command signal 15 is connected to the other input.

Furthermore, the output of this NAND circuit 14 is connected to the input of a NOT circuit 16, and the output of this NOT circuit 16 is connected to a printing device.

The print command signal 15 uses the calculation end signal 12 described above, and becomes "H" when the price calculation is completed.

Further, the printing device is arranged to perform a printing operation when the output of the NOT circuit 16 is "H".

The operation of the present invention having the above structure will be described below.

When using an electronic scale with the quantitative lock switch turned on, that is, the anti-flicker circuit is activated, the quantitative lock signal 10 is "H", and the weight discrimination signal 11 and calculation end signal 12 are "H" before starting weighing. Each “L” is NAND
The output of the circuit 9 becomes "H".

Therefore, the latch circuit 7 does not operate, and the weight counter 1
The code output 8 of the counter 5 of the 1000th digit is "
The output of the NOT circuit 13 is "H", while the print command signal 15 is "L", and the output of the NAND circuit 14 is "H".

Then, the output of the NOT circuit 16 becomes "L", and the printing device does not perform a printing operation.

Next, when weighing is started, the weight discrimination signal 11 becomes "H", and if the weight of the item is within the weighing capacity, the code output 8 of the counter 5 in the 1000th digit of the weight counter 1 is "L".
” remains.

Then, when the price calculation is completed, the calculation end signal 12 is "
The output of the NAND circuit 9 becomes "L" and the latch circuit 7 operates.

As a result, the output of the latch circuit 7 is held at "L" and NOT
The output of the circuit 13 becomes "H", the other printing command signal 15 becomes "H", the output of the NAND circuit 14 becomes "", and the output of the NOT circuit 16 becomes "H", and the printing device starts printing. Perform the action.

When the weight after weighing reaches zero g, the output of the NAND circuit 9 becomes "H" and the operation of the latch circuit 7 is released.

On the other hand, if the weight of the item is greater than the weighing weight, the code output 8 of the counter 5 at the 1000th digit will be "H", and after the price calculation is completed, the output of the NAND circuit 9 will be "H" as described above.
Since it becomes "L", the latch circuit 7 operates and this output becomes "
It is held at "H".

Therefore, even if the output of the NOT circuit 13 becomes "L" and the print command signal 15 becomes "H", the output of the NAND circuit 14 remains "H" and the output of the NOT circuit 16 remains "L", so that printing is not possible. The device does not print.

Then, when the weight returns to zero I, the weight discrimination signal 11 becomes "L".
Then, the output of the NAND circuit 9 becomes "H" and the latch operation of the latch circuit 7 is released.

Next, when the electronic scale is used with the quantitative lock switch turned off, that is, without operating the flicker prevention circuit, the quantitative lock signal 10 is "L" and the output of the TNAND circuit 9 is always "H". Therefore, the latch circuit 7 does not perform any latch operation.

Therefore, in this case, it will be easy to see that the printing device will perform a printing operation if the item is weighed in excess of the weighing amount.

In the present invention, the weight counter 1 has four digits, but it goes without saying that the present invention can be practiced with any number of digits.

Also, in this invention, the case where the digits other than the most significant digit are zero, such as when the weight is 2 kg or 3 kg, has been explained.
For example, if the weight is 15 kg, it will be 16.5 kg as mentioned above.
It is possible to measure up to the 1000th grade.
AND output of the code output of 1 of the counter of the 0th place digit and the code output of 1 and 4 of the counter of the 1000th place digit, and the code output of 1 of the counter of the 10000th place digit and the code output of the 1000th place digit The AND output of the code outputs of the counters 2 and 4 and the OR output of both AND outputs may be connected to the latch circuit 7.

In other words, the circuit may be constructed by combining code outputs so that the code output 8 of the weight counter 1 always becomes "H" when the weighing amount is greater than the weighing amount, regardless of the weighing amount.

Further, the weight counter 1 according to the present invention may be used in common with a weight counter for calculating weight and price, or may be provided separately.

However, if the weight is displayed after subtracting the weighed amount when more than the weighing amount is measured, a separate weight counter must be installed.

Furthermore, although this invention describes an electronic scale that can activate or disable a metering lock, that is, an anti-flicker circuit, it does not have an electronic scale with an anti-flicker circuit that cannot be switched or does not have an anti-flicker circuit at all. This invention can also be applied to electronic scales and the like.

However, at this time, the inputs to the NAND circuit 9 are two signals, the weight discrimination signal 11 and the calculation end signal 12.

As explained above, this invention is configured so that the printing device linked to the electronic scale does not print when a measurement exceeding the weighing amount is performed, so that only the weight, price, unit price, etc. of the items within the weighing amount are recorded. It can be printed on labels and recording paper, and electronic scales can be used appropriately.

Therefore, it is possible to prevent products with labels with inaccurate numerical values printed on them from being sold on the market, and records are also accurate and reliable.

Furthermore, the circuit structure is simple and can be incorporated into conventional electronic scales very easily.

[Brief explanation of drawings]

The drawing is a circuit diagram showing one embodiment of the present invention. 1... Weight counter, 7... Latch circuit, 9... NAND circuit, 11...
Weight discrimination signal, 12...Calculation end signal, 13.
...NOT circuit, 14...NAND circuit, 15...Print command signal, 16...N
OT circuit.

Claims (1)

[Claims] 1 Configure a circuit by combining the code outputs of the weight counter so that the input from the weight counter to the latch circuit is always rHJ when weighing more than the weighing is performed, and outputs the weight discrimination signal and calculation end signal (or further Connect the NAND output of the quantitative lock signal) to the latch circuit, invert the output of this latch circuit, further invert the NAND output of this inverted output and the print command signal, and connect it to the printing device to print more than the weighed amount. A printing control circuit for a printing device linked to an electronic scale, characterized in that the printing control circuit is configured to prohibit