JPS6045477B2 - How to control a vending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system for a vending machine in which various terminal parts of the vending machine are centrally controlled by a central processing unit.

Conventionally, in vending machines where the various switches and displays that are the components of the vending machine are centrally controlled by a central processing unit such as a micro CPU, the central processing unit and each of these terminal parts are connected one-to-one. is common.

Therefore, the central processing unit requires a large number of input/output terminals, and the number of wires increases, making wiring processing very troublesome during assembly. The central processing unit requires complex control to send and receive signals to and from each terminal component. In view of the above points, the present invention provides a method of controlling a vending machine that effectively reduces the wiring between the central processing unit and each terminal component and that is easy to process.

In order to achieve such an object, the present invention provides a sales price setting means, a product sold-out detection means, a product selection switch, a product sold-out display means, and a product sellable unit that includes one transmission line for each product sales column. In addition to connecting the display means, bus set means is provided for activating specific transmission lines under control of the central processing unit, and in a first step, the central processing unit sequentially sets the transmission lines one by one under control of the bus set. The product is activated one by one to detect sales price data, product sold-out information, and product selection switch operations for each product sales column, and also determines whether or not the product in that product sales column can be sold according to the input amount, and selects the product. If the switch is not operated, in a second step, the central processing unit controls the bus set means to display the product sold-out information and the product sales possibility on the product sold-out display means and the sellable display means, respectively. It is designed to indicate gender.

With such a configuration, the central processing unit controls the bus set means to introduce various pieces of information for each product sales column, and also to display the sold-out product and the possibility of product sales. An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the present invention applied to a five-column vending machine. Therefore, the bus line 5 consists of five transmission paths, and each transmission path 51, 52, 53, 54, 55 has a sold-out detection switch 2 and a selection switch 3 in the corresponding column.
, a sellable indicator lamp 7, a sold-out indicator lamp 6, and a price setting section 4 are connected. Each transmission path 51 of the bus line 5
, 52, 53, 54, and 55 are connected to each stage of the shift register 8 consisting of five stages of delay flip-flop circuits, and are controlled to be conductive or non-conductive in accordance with their output states. For example, in this embodiment, the circuit is designed so that when the output state of the stage of the shift register 8 is RO, the corresponding transmission path becomes conductive. Of course Rl. It is also possible to design a circuit that conducts when the transmission path becomes conductive, and it is clear that the shift register 8 should be controlled so that the stage corresponding to the transmission path to be rendered conductive has a different output state from the other stages. Become. In addition, the price setting unit 4 consisting of five changeover switches 41 sets the product price of the corresponding column, and each changeover switch has a weight of 1, 2, 4, 8, and 16, and each has a weight of 0N (output RO). Alternatively, by turning it OFF (output r1), the product price can be set in binary code. Then, the product price information shown in parallel on the 5-bit transmission line 16 from each changeover switch 41 enters the shift register 89, is converted into serial information, and is sent to the CPU.
It is designed to be input to Further, the ROM10 stores a program according to the flowchart shown in FIG. 2, and the CPU1 reads and executes the program. The operation will be explained using the flowchart shown in FIG.

First, when the power is turned on and the bus set mode is reached after going through the initial state 1NIT, only the transmission path between the column to be scanned by CPU1 among the bus lines and CPU1 is made conductive. In order for only the transmission path 51 to be conductive, the outputs Ql, Q2, Q, , Q, , Q5 of each stage of the shift register 8 should each be ROJrljrlJrlJrlyo・CP.
Ul performs processing so that the shift register 8 is in this state.

The configuration and operation timing chart of the shift register 8 are shown in FIGS. 3 and 4. That is, the CPUl outputs the shift pulse CPl to the delay flip-flop circuit 11 via the I/O boat 121 end, and also outputs the shift pulse CPl to the I/O boat 12h.
5 to the first stage delay flip-flop circuit 11 through the end.
bit data RlJrlyo RlJrlJrloRO
Output J sequentially. Therefore, the contents of the data input appear on the Q1 output at the rising edge of the 1st bit shift pulse,
The Q of the 1st bit changes at the rising edge of the 2nd bit shift pulse.
The content of the 1st output appears on the Q2 output, and the content of the 2nd bit data input appears on the Q1 output, and in the same manner, the output of each stage becomes ROJrlJrlJrlJrlJ by the 5th bit shift pulse.

In the timing chart, the output waveform from Q1 to q, indicated by the dotted line, is the content held in the shift register 8 before entering this operation, and is r1 or ROJ, but it is the rising edge of the 5th bit shift pulse CP1. It all disappears.

When the transmission path 51 becomes conductive in the bus set mode, the CPU1 starts scanning the corresponding column.

First, in the sold-out determination mode, the CPU 1 opens the I/O port 12d so that a signal can be input.
The product sold-out detection switch 2 turns 0N when the product in the column runs out, and if the product is sold out, the Q1 output ROJ of the shift register is sent via the transmission path 51 and the sold-out switch 2.
is input to CPU1, and it is possible to detect out-of-stock items in this column. Therefore, if the product is out of stock, ROJ is stored in the internal scratch bad register, and if the product is not out of stock, RlJ is stored in the internally provided scratch bad register. C in sales price input mode
PU1 outputs shift pulse CP2 and PL signals from the I/0 ports 12e◆f ends, respectively, and reads price information from the price setting section 7. 6 and 7 show the structure and operation timing chart of the shift register 9. FIG. For example, if the price set by the price setting unit 4 corresponding to the transmission path 51 is 100 yen, the Q1 output RlJ of the shift register 8 will result in 5bi
Price information ROJrlJlOJ via t transmission line 16
When the PL signal arrives, rlJrOJ is input to input terminals 1 to 5 of the j shift register 9, which is composed of a five-stage delay flip-flop circuit 13.

Then, the shift register 9 is shifted up by the 5-bit shift pulse CP2 sent out, and the price information RO/RlJ is sent from the delay flip-flop circuit 13 at the last stage.
ROJrlJrOJ is serially output to the CPU1 via the I/0 port 12g end.

The timing chart in FIG. 7 shows the output status of each stage of the 5-stage delay flip-flop circuit 13 using waveforms A, B, C, D, and E. In particular, E shows the output status of each stage of the 5-stage delay flip-flop circuit 13. This is price information that is serially output to the CPU1. In the sellability determination mode, it is determined whether the product in this column can be sold based on the price information input to the CPU1 and the result of the sold-out determination stored in the scratchpad register.

As mentioned earlier, the present invention is a control method for a vending machine in the sales standby state, and if there is an input amount, the CPU compares and calculates this amount with the above-mentioned input price information and sells it. Make a judgment. Further, even if there is no input amount, O and the price information are compared and calculated, but naturally it is not determined that the product can be sold. If the CPU1 is sellable, the result of this judgment is RO
, if this is not possible, store it in the scratch bad register as RL. The selection mode detects whether the column selection switch 3 for the transmission path 51 is operated.

Although the selection switch 3 is not shown, it is configured so that when it is operated in the sales ready state, the ON state is maintained until delivery of the product is confirmed. Therefore, in the case of 0N, C
ROJ is input to PU1 via the I/0 boat 12c end, and the start of a sales operation can be detected. Therefore R.O.
In response to the input, CPU1 jumps to the sales routine and performs sales control. If the selection switch 3 is not operated, the highest column determination mode is reached.

In this mode, it is determined whether the column scanned so far is the last column, and if there is another column to be scanned, the mode shifts to bus set +1 mode. The scanning described above is
This is performed when 5 bits of shift pulse CPl are output and the state of the shift register becomes ROJrlJrlJrlJrlJ. To scan the next column, only the output of the shift register 8 is set to RO so that the transmission path 52 becomes conductive. , J, the CPU1 sets the bus.

Therefore, in this mode, CPUl has data RlJ.
<When the 56th bit shift pulse CPl is output to the shift register (8), its output state is RlJrOJrlJ
Then, the above-mentioned series of scans including the sold-out determination, sales price input, sale availability determination, and selection of the column corresponding to the transmission path 5 are executed again, and the operation of the selection switch 3 of this column is also performed here. If not, the bus set mode is reached again.

Then, when the data is 0, the CPU1 outputs the shift pulse CP1 of the 7th bit to the shift register 8, the transmission path 53 is made conductive, and scanning of the corresponding column is restarted. While the scanning of each column is executed in this way, when the topmost column determination mode is reached five times without operating any of the selection switches 3, the CPU outputs a 9-bit shift pulse, and therefore all columns are scanned. When the column scanning step is detected to have been completed, the column scanning step proceeds to the display step.
Now, in the column scanning step, the transmission path 52, 5 is sold out.
It is detected that the column corresponds to RlJrOJr.
The following explanation assumes that it is stored as lJrOJrlJ.

First, in the bus set mode, CPUl and data RlJrOJrlJ based on the memory of the scratch bad register.
rO. UrlJ (outputs a 55-bit shift pulse CPl to the shift register 8. This timing chart is shown in FIG. 5, but the operation is the same as that in FIG. Written and output state is RlJrOJrlJrOJ
rlJ and the bus is set. That is, the transmission paths 52, 5
4 became conductive.

However, when the output QPUl outputs RlJ from the I/0 boat 12b end to the base of the transistor 14 in the sold-out display ON mode, an indicator lamp lights up from where the transmission paths 52 and 54 are conductive, and L4 lights up to indicate that it is sold out. can do.

And in the sold-out display OFF mode after lighting for a predetermined time, I
The RlJ output from the /0 port 12b end is stopped and the light is turned off. The next step is to display the sales availability status.

This operation is also the same as the sold-out display.The CPU 1 inputs the sellable determination data stored in the scratch bad register to the shift register 8 along with a 5-bit shift pulse to set the bus and enable conduction of the transmission path corresponding to the sellable column. . At this time, if there is no input amount, or if there is, but the selling price has not been reached, the sellability determination data is set to 1. ．． RlJrl. ．． Conduction is not possible at rlJrlJ.

Shino? PUl outputs RlJ from the terminal of the /O boat 12a to the base of the transistor 15, and +V2 is applied to the sellable display lamps L''1, L''2, L''3, L''4, L''5.Saleable. After displaying for a predetermined period of time, the input amount display routine is reached and the CPU1 executes the input amount display operation.

Thereafter, in the flowchart, the processing of the CPU1 returns to the column scanning step, and if no coins have been inserted, or if the selection switch 3 has not been operated even if coins have not been inserted, the operations up to this point are repeated. It will be done. Naturally, when money is inserted or additional money is inserted and the sellable status changes, the CPU1 determines the sellable products according to the amount in the next sellable determination mode, and in the display step, the sellable products that match the sellable products are determined. Perform display. In the present invention, a transmission line is provided for each product sales column, and the terminal parts of the column are commonly connected to this transmission line, so that the wiring between the central processing unit and the terminal parts can be greatly reduced.

The bus set means sequentially activates the transmission line for each product sales column to read information and display products sold out and available for sale for each column, which not only simplifies control but also reduces malfunctions. .

[Brief explanation of the drawing]

FIG. 1 shows a vending machine to which the control method of the present invention is applied,
FIG. 2 shows an operation flowchart, FIGS. 3, 4, and 5 show the logic circuit and operation timing chart of the shift register 8, and FIGS. 6 and 7 show the logic circuit and operation timing chart of the shift register 9. . Explanation of main drawing numbers 1...Central processing unit, 2...Product sold out detection means, 3...Sales command generation means, 4...Sales price setting means, 5...Bus line, 6 ...Merchandise sold out display means, 7...Sale available display means.

Claims (1)

[Claims] 1. In a vending machine that is equipped with terminal parts such as a sales price setting means, a product sold-out detection means, a product selection switch, a product sold-out display means, and a sellable display means for each product sales column, one for each product sales column. transmission lines to connect the corresponding terminal parts, and a bus set means for activating a specific transmission line under control of the central processing unit, and in a first step, the central processing unit activates the specified bus set. By controlling the means, the transmission lines are sequentially activated one by one to detect sales price data, product sold-out information, and product selection switch operations for each product sales column, and to detect products in the product sales column according to the input amount. It is determined whether or not the product can be sold, and if the product selection switch is not operated, in a second step, the central processing unit, under the control of the bus set, indicates the product sold out display means and the saleable display means, respectively. A control method for a vending machine that displays information and product sales possibilities.