JPS6348009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fee calculation scale that calculates and displays the price of an object to be weighed from weight information and unit price information.

In order to improve the operability of the price calculation scale, conventionally, a price look-up (hereinafter referred to as PLU) has been used, which allows a target unit price to be input into the price calculation section with a one-touch operation.
system is used. This PLU system writes the unit price of a predetermined object to be weighed in advance at a predetermined address in a semiconductor memory device, and operates an address designation push button switch provided corresponding to the predetermined address as necessary. , is configured to designate a read address to the semiconductor memory device and read out necessary unit price information.

In actual weighing work, the tare used is several standardized types of toilets, etc., so the amount of each tare to be used is written in advance in a predetermined address of the semiconductor memory device, just like the unit price above, and when necessary, Read out and tare compensation with one-touch operation [see below]
It is conceivable that it could be called TLU.

Regarding the unit price and tare weight, when the PLU and TLU are used, the operability is significantly improved, but simply using both together will cause the push button switch for reading out the unit price and the push button switch for reading out the tare weight to be Since it can only be used uniquely, information on the other side (for example, the tare amount in the semiconductor memory device on the PLU side) is written into the vacant address of one of the semiconductor memory devices on the PLU side and the semiconductor memory device on the TLU side. Therefore, the semiconductor memory device cannot be used effectively.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a charge calculation scale that can effectively use a semiconductor memory device.

An embodiment of the present invention will be described below based on the drawings.

Figure 1 shows a configuration diagram of a charge calculation scale, where 1 is a load cell that converts the load G into an electrical signal, and 2 is an analog/digital type that converts the output of the load cell 1 via an amplifier 3 into a digital value Dg as weighing information. The converter 4 is a subtraction unit serving as a tare correction unit, which subtracts the tare weight value given by the tare amount information D _T described later from the weight value given by the digital value Dg to calculate the net weight value. do. Reference numeral 5 denotes a price calculating section which calculates the price of the object to be weighed from the unit price given by unit price information Da, which will be described later, and the net weight value. Numerals 6 and 7 are a weight display section and a price display section for digitally displaying the net weight value and the price of the object to be weighed, respectively.

Reference numeral 8 denotes a semiconductor memory device such as a RAM, in which the read/write mode is specified by an instruction signal R/W, and the first information I and the first information consisting of four numbers A ₁ , A ₂ , A ₃ , and A ₄ are specified. For example, 24 pieces of information consisting of 1 piece of information I and 2nd piece of information representing the type of information I are taken as 1 unit.
It is configured such that units can be written in predetermined locations _a1 to _a24 . 9 reads out to the semiconductor memory device 8/
A selection switch operation panel for specifying a writing address is provided with 24 key switches SW ₁ to SW ₂₄ corresponding to the addresses a ₁ to _{a 24} , and the detection signal of the selected key switch is sent via the encoder 10. It is converted into address designation information corresponding to addresses a ₁ to _{a 24} of the semiconductor memory device 8 . 11 is a circular shift.
A register consisting of a register or the like stores information of a predetermined location read from the semiconductor memory device 8 until one of the selection key switches SW ₁ to SW ₂₄ is operated next. For convenience of explanation, _B1 of the register 11 in FIG.
represents the time slot section in which the second information is stored at the time of reading out the information (I), and the remaining time slot sections B ₂ , B ₃ , B ₄ , and B ₅ are used for writing information into the semiconductor memory device 8. The following description will be made assuming that the four numbers A ₁ to _{A 4} at the time are stored. Further, as the second information, at the time of writing the information into the semiconductor memory device 8, a specific code is written based on the first information I being unit price information or tare weight information. 12
is an identification unit that identifies second information read from the semiconductor memory device 8;
Depending on the content of the time slot _B1 , one of the output lines _O1 and _O2 is alternatively inverted to logic "1". 13a and 13b are AND gates serving as gate circuits that allocate the first information I read from the semiconductor memory device 8 to the subtraction unit 4 or the price calculation unit 5 according to the identification result of the identification unit 12; Output line that inverts to logic level “1” when slot B ₁ is the tare weight code
The AND gate 13a output controlled by O ₁ is connected to the subtraction input of the subtraction unit 4, and the AND gate 13b output controlled by the output line O ₂ is connected to the unit price information input of the price calculation unit 5. There is. 1
4 and 15 are AND gates 13a and 13b, respectively.
These are a tare weight display section and a unit price display section that digitally display the output first information I as a tare weight and a unit price.

Next, the periphery of the semiconductor memory device 8, which is the main part of the present invention, will be explained in detail.

First, the information to be written into the semiconductor memory device 8 is given from a number key switch or a digital switch with a predetermined number of digits, and for the number sequence as the first information I, several bits are written for each number A ₁ , A ₂ , A ₃ , A ₄ . However, as long as the second information has at least 1 bit, it can be used as the specific code. Note that the time slot sections _B2 to _B5 and _B1 of the register 11 are also changed according to the write information ().
Each of the time slot sections _B2 to _B5 consists of several bits, and at least one bit needs to be applied to the time slot section _B1 .

For example, when the first information I is a tare amount, "1" is set as the second information, and when it is a unit price, "0" is set at the time of writing.

When the write information V is set in this way and the instruction signal R/W is in the write mode, when a predetermined key switch on the selection switch operation panel 9 is operated, a predetermined location in the semiconductor memory device 8 corresponding to the operated key switch is selected. The contents are updated to the set write information V. In this way, "1" is set as the tare weight and second information, or "0" is set as the unit price and second information for key switches SW ₁ to SW ₂₄ , and writing is performed in order at the predetermined locations. Ru.

Next, tare correction and price calculation operations will be explained. The following description will be made assuming that the instruction signal R/W is in the read mode when the fee calculation scale is in use.

(1) Tare correction When the key switch corresponding to a predetermined tare amount among the key switches SW ₁ to _{SW 24} is operated with one touch, the first information I consisting of a number sequence and the information of the specific code "1" are stored in the register 11. be done. Since the time slot section B ₁ has the specific code "1", the identification section 12 inverts the output line O ₁ side to logic level "1" and outputs the AND gate 1.
The first information I stored in the register 11 through the AND gate 13a of 3a and 13b.
is input to the subtractor 4. Subtractor 4 has output line O ₁
The first information given to the subtrahend input is taken in by the instruction.

(2) Price calculation When the key switch corresponding to a predetermined unit price among the key switches SW ₁ to _{SW 24} is operated with a single touch, the register 11 stores the first number consisting of a number sequence.
The information I and the information of the specific code "0" are stored. Since the time slot section B ₁ has the specific code "0", the identification section 12 inverts the output line O ₂ side to logic level "1", and outputs the AND gate 13.
The first information I stored in the register 11 is inputted to the price calculation section 5 via b. Price calculation section 5
takes in the first information given to the unit price information input according to the instructions on the output line _O2 .

In addition, in the above tare correction and price calculation, the subtraction unit 4
The first information I taken into the price calculating section 5 is sequentially updated to new first information, for example, each time a new tare amount setting operation and unit price setting operation are performed.

In this way, at the time of writing to the semiconductor memory device 8, by selectively setting a specific code, the read number sequence can be divided into tare information and unit price information. For example, tare information can be written only in the necessary amount of data ₁ to _a24 , and the rest can be used to write unit price information, so that the semiconductor memory device 8 can be used effectively.

In addition, each key switch on the selection operation panel 9 can be activated simply by selectively determining a specific code at the time of writing.
Since SW ₁ to _{SW 24} can be used as switches for reading tare weight or unit price, key switches SW ₁ to SW 24 on the selection switch operation panel
The user of the fee calculation scale can arbitrarily determine the position of the key switch for unit price reading and the position of the key switch for tare reading without mechanically changing the installation position of SW ₂₄ , further improving operability. improves. 2 to 4 respectively show the positions of the key switch for unit price reading and the key switch for tare reading on the selection switch operation panel 9. In FIG.
SW ₈ , SW ₁₆ , and SW ₂₄ represent the key switch for tare reading, and at the time of writing, the key switch is
A specific code "1" is written as second information in the addresses of the semiconductor memory device 8 corresponding to SW ₈ , SW ₁₆ , and SW ₂₄ , respectively. In FIG. 3, keyswitches SW ₁₇ to _{SW 24} represent, for example, keyswitches for reading tare weights;
A specific code "1" is written as second information () in the addresses of the semiconductor memory device 8 corresponding to _SW17 to _SW24 , respectively. In FIG. 4, key switches SW ₁ to SW ₈ and SW ₁₇ to _{SW 24} represent, for example, tare reading switches. In this way, any of the rows and columns of the key switches SW ₁ to _{SW 24} can be used as tare reading switches or unit price reading switches. Further, in the present embodiment, each key top of the key switches SW ₁ to _{SW 24} is used in a state in which readable unit price/tare distinctions and their set values are named, for example. In the above embodiment, the first information has been described as a sequence consisting of four numbers from 0 to 9, but it may be any sequence consisting of a predetermined number of numbers. Further, the specific code of the second information is not limited to "1" and "0".

As explained above, according to the present invention, a plurality of units of information are stored in a predetermined location, with one unit of information consisting of first information consisting of a sequence of a predetermined number of numbers and second information representing the type of the first information. Since the configuration is configured to identify the second information of the information read from the semiconductor memory device that can be written to and output the first information of the read information divided into tare amount information and price information, one-touch operation is possible. The required tare amount and unit price can be set by the method, and a specific code is recorded as second information according to the type of first information (tare amount and unit price) at the time of writing to the semiconductor memory device. By simply storing the information, the data is automatically sorted into tare information and unit price information after reading, and the limited storage bits of the semiconductor memory device can be used to store both tare amount and unit price. can be used effectively, and the operability can be further improved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a configuration diagram of a charge calculation scale, and FIGS. 2 to 4 are explanatory diagrams of a selection switch operation panel of the same device. 4... Subtraction section [tare correction section], 5... Price calculation section,
8... Semiconductor memory device, 9... Selection switch operation panel, 12... Identification section, 13a, 13b... AND gate [gate circuit], I... First information,... Second information, SW ₁ to _{SW 24} ... Key switch.

Claims (1)

[Claims] 1. In a fee calculation scale that calculates the price of the object to be weighed by calculating unit price information and weighing value information from which the tare amount has been subtracted through the tare correction section in a price calculation section,
A semiconductor memory device capable of writing a plurality of units of information into a predetermined location, with one unit of information consisting of first information consisting of a sequence of a predetermined number of numbers and second information representing the type of the first information; an identification unit for identifying second information of the one unit of information read from a predetermined address of the semiconductor memory device; and a first identification unit of the information read from the semiconductor memory device according to the identification result of the identification unit. A charge calculation scale characterized by being provided with a gate circuit for inputting information to a tare correction section or a price calculation section as tare amount information or unit price information.