JPH0721452A - Controller for automatic vending machine - Google Patents

Abstract

PURPOSE:To reduce cost due to the simplification of wiring work and to prevent the malfunction of a sell-out display function. CONSTITUTION:Signal generating circuits 14, 15 respectively output detection signals NG1, NG2 in a current supply state, and when an inspection relay RA, a selection relay RS and a group relay RG are selectively driven in the detected state of sell-out by a sell-out detecting switch 22, shows the current supply state. When a discharge command signal is applied, a bend terminal control device selectively drives the relays RC, RS, RG in a current supply control means 18, supplies a current to a prescribed electromagnetic solenoid 23 to execute vending operation, successively stops the operation of respective relays RC, RS, RG, selectively drives the relays RA, RS, RG, and judges the operation state of the switch 22 based upon the existence of the detection signals NG1, NG2 applied from the circuits 14, 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for an automatic vending machine, which stops the sale of products when the stored products in the column are in an empty state or a state close to this state, and displays the sold-out state. Regarding

[0002]

2. Description of the Related Art In a general vending machine, a product in a column is discharged (sold) in response to the drive of a bend mechanism provided in each of a plurality of columns. In addition to an electromagnetic solenoid that is a drive source thereof, a sold-out detection switch that operates when a stored product in the column is in an empty state or a state close to this is provided.

In this case, the electromagnetic solenoid is connected so as to be energized by an AC power source, and
The sold-out detection switch is connected so that it can be scanned by a DC signal from a sales control circuit for controlling sales and display of sold-out.

[0004]

In the above-mentioned conventional structure, it is necessary to form the AC wiring for the electromagnetic solenoid and the DC wiring for the sold-out detection switch as independent systems,
AC wiring and DC wiring are mixed in the bend mechanism. For this reason, it is inevitable that the wiring in the bend mechanism becomes complicated, which deteriorates the manufacturing workability and eventually increases the manufacturing cost. In addition, when AC wiring and DC wiring are mixed in this way,
Since there is a high possibility that noise on the AC wiring side will be superposed on the DC wiring, there is also a problem that the sold-out display based on the sold-out detection switch may be erroneously displayed.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce costs associated with simplification of wiring work and to prevent a malfunction of a sold-out display function using a sold-out detection switch. It is an object of the present invention to provide a control device for a vending machine, which can be effectively prevented.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of driving devices for ejecting stored articles in a plurality of columns when energized from an AC power source. Each of which is provided with a main switch and a plurality of sub-switches for selectively energizing each drive device, and energization selection means, which is connected in parallel with the main switch and has a current of An operating state detection means configured to output a detection signal to a signal line electrically insulated from the AC power supply in a flowing state; and a main switch in the energization selection means when a discharge command signal is given. And sequentially operating the sub-switches at different timings to perform an operation of forming an energization path of the drive device designated by the discharge command signal in the drive device, The control means having a function of detecting each short-circuited state of the main switch and the sub switch based on the presence or absence of a detection signal from the operation state detection means at the timing of the operation of the main switch and the sub switch or the operation stop timing, and the column A plurality of sold-out detection switches having a normally open switch element that is turned on when the stored products inside are empty or a state close to this, and a normally closed switch element that is turned on in other states,
A normally-open switch element of the sold-out detection switch in an operating state, an operating state detection means, and an inspection switch that forms an energizing path through the drive device are provided, and the normally-closed switch element of the sold-out detection switch is After intervening in the energization path of the drive unit via the energization selection unit, the control unit is caused to operate the inspection switch after executing the energization path forming operation operation of the drive unit, and at the time of this operation. In the constitution (1), a function for judging the operating state of the sold-out detection switch on the basis of the presence or absence of the detection signal from the operating state detecting means and displaying the sold-out state is added (claim 1).

In this case, the same drive device, energization selection means, sold-out detection switch, and inspection switch as those described above are provided, and a current flowing through the main switch is detected instead of the operation state detection means. And a current detection means configured to output a detection signal to a signal line electrically insulated from the AC power source, and a main switch and a sub switch in the energization selection means when a discharge command signal is given. Are sequentially operated at different timings to perform the operation of forming the energization path of the drive device designated by the discharge command signal in the drive device, and the current at the operation or operation stop timing of the main switch and the sub switch. Each short-circuit state of the main switch and sub-switch based on the presence or absence of the detection signal from the detection means A control means having a function of detecting is provided, further, the normally-closed switch element of the sold-out detection switch is interposed in the energization path of the drive device via the energization selection means, and then, with respect to the control means, The inspection switch is operated after the energization path formation operation of the drive device is performed, and the operation state of the sold-out detection switch is judged based on the presence or absence of the detection signal from the current detection means during this operation, and the sold-out display is displayed. It is also possible to add a function to perform (claim 2).

In addition, a test sale switch for confirming whether or not the product sale operation is normally performed according to the energization of the drive unit is provided, and the control means is displayed in the state of being sold out. When the test sales switch is operated, the inspection switch is operated and the energization selecting unit is operated, so that the inspection device, the normally open switch element of the sold-out detection switch, and the energization selecting unit are operated to connect the drive unit. It is also possible to adopt a configuration in which an electric path is formed (claim 3).

[0009]

In the controller of the automatic vending machine according to the first aspect of the present invention, the control means, when the discharge command signal is given, sequentially operates the main switch and the sub switch in the energization selection means at different timings. The energization path of the drive device designated by the release command signal of the drive device is formed. In this case, when the products in the column are not sold out, the normally closed switch element of the sold out detection switch is turned on, so the above-mentioned energization path in which this normally closed switch element is interposed is cut off. Instead, the selling operation is performed in which the drive device is energized to release the stored products in the corresponding column.

Here, the operating state detecting means connected in parallel with the main switch interrupts the current when the operating command is given to the main switch when the main switch is functioning normally. When the main switch and the sub switch are functioning normally, the detection signal will stop outputting, and when the operation command is given to the sub switch with the main switch operation stopped, the current will flow and the detection signal will be output. And the detection stop is also output when the main switch is stopped while the sub switch is operating. Therefore, it is possible to know the operation or operation stop state of the main switch or the sub switch based on the output from the operation state detection means at the operation or operation stop timing of the main switch and the sub switch. This phenomenon is used to detect the short-circuit state (normal operation state and contact welding state) of the main switch or sub switch.

The control means operates the inspection switch after executing the above-mentioned selling operation, and in response to such operation, the normally open switch element of the sold-out detection switch, the operating state detecting means, and the drive. The device is connected to the AC power supply in series. In this case, when the product is stored in the column, the above-mentioned normally open switch element is turned off, so that the detection signal is not output from the operation state detection means, and the control means displays the sold-out condition. There is no.

On the other hand, when the articles stored in the column are empty or nearly empty, the normally-open switch element and the normally-closed switch element are turned off in the sold-out detection switch. Become. For this reason, the energization path of the drive device via the energization selection means is cut off according to the turning off of the normally-closed switch element. Therefore, when the emission command signal is given to the control means as described above. Also in this case, the sale operation of the product is not performed.

When the normally open switch element of the sold-out detection switch is turned on in this way, as described above,
Depending on the operation of the inspection switch, when the normally open switch element of the sold-out detection switch, the operating state detecting means, and the driving device are connected in series to the AC power source, the operating state detecting means is energized. As a result, the detection signal comes to be output from the operation state detection means, and the control means which receives the detection signal makes a sold-out display.

In this case, since the sold-out detection switch is incorporated in an AC wiring system including a drive device, an AC wiring for the drive device and a DC wiring for the sold-out detection switch are provided as in the conventional structure. Since it is not necessary to provide each as an independent system, wiring can be simplified, and the operating state of the sold-out detection switch can be reliably detected without being affected by noise. This eliminates the possibility that the sold-out display based on the sold-out detection switch will be erroneously displayed.

In the control device for the vending machine according to the second aspect, the function of the above-mentioned operation state detecting means is replaced by the current detecting means. In this case, the current detection means provided to detect the current flowing through the main switch, when the main switch is functioning normally, interrupts the current when the operation stop command is given to the main switch. The detection signal is now stopped,
Further, when the main switch and the sub switch are functioning normally, the current is cut off and the output of the detection signal is stopped when the operation stop command is given to the sub switch while the main switch is operating. Therefore, the operation or operation stop state of the main switch or the sub switch can be known based on the output from the current detection means at the operation or operation stop timing of the main switch and the sub switch. The short circuit condition of the main switch or the sub switch is detected by using such a phenomenon. Further, the detection signal from such a current detecting means is used for the sold-out display using the sold-out switch, as in the case of claim 1.

In the control device for an automatic vending machine according to a third aspect of the present invention, the control means activates the inspection switch and turns on the power when the test sale switch is operated while the sold-out display is being performed as described above. By operating the selection means, the energization path of the drive device is formed via the inspection switch, the normally open switch element of the sold-out detection switch, and the energization selection means. As a result, the drive device is energized to forcibly perform the product sales operation, and it is possible to confirm whether or not the product sales operation is normally performed based on the presence or absence of such operation. In this case, when the stored product in the column is completely empty, the product selling operation is not performed, but it can be confirmed by the operation sound of the drive device.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 3 schematically shows an electrical configuration of a main part of the vending machine. In FIG. 3, the selection device 1 comprises a plurality of product selection switches (not shown) arranged on the front of the vending machine.
The ON signal of each product selection switch is input to the main controller 4 via the input / output interface 2 and the serial bus line 3. The product selection switches are provided in a number corresponding to, for example, 32 columns (not shown) of the vending machine in a one-to-one correspondence.

The main control unit 4 includes a microcomputer, and controls the lighting of the available-for-sale lamp 5, the sold-out lamp 6, the change-out lamp 7 and the on-sale lamp 8 provided on the front of the vending machine. The configuration is performed through the serial bus line 3 and the input / output interface 2, and at the same time, signals are exchanged through the serial bus line 3 with the well-known bilval mechanism 9, the coin mechanism 10 and the bend terminal 11 directly related to the gist of the present invention. Has become.

Particularly, in this case, the main controller 4
Is a discharge including a code that can identify the selected product when the product selection switch in the selection device 1 is operated in a state where the bill-barry mechanism 9 or the coin mechanism 10 detects the insertion of coins having a reference amount or more. The command signal Sa is generated, and the release command signal Sa is transmitted to the bend terminal 11.

FIG. 2 schematically shows the electrical construction of the bend terminal 11. In FIG. 2, a bend terminal control device 12 as a control means including a microcomputer performs signal exchange with the main control device 4 through an input / output interface 13, and will be described later as an operation state detection means. Signal generation circuits 14 and 15 and a test sales switch 16 provided corresponding to each column
The output signal from is received via the input buffer 17. The signal generation circuits 14 and 15 output the detection signals NG1 and NG2, respectively, when the situation described later is reached, and the test sale switches 16 are for testing when turned on. It is configured to output the signal Sb.

The energization control means 18 is, for example, two group relays RG-1 and RG-2 as main switches.
And, for example, eight selection relays RS-1 to RS-8 as sub-switches and, for example, two common relays RC-1 and RC-2 similarly as sub-switches. The inspection means 19 includes, for example, eight inspection relays RA-1 to RA-1 as inspection switches.
It has a configuration including RA-8.

Therefore, the bend terminal control device 12 controls the energization control means 18 and the inspection means 19 by the driver 20.
And 21. Such control is performed as described later on the basis of the input states of the release command signal Sa, the detection signals NG1, NG2 and the test signal Sb, and a program stored in advance. Be seen.

FIG. 1 shows a concrete circuit configuration of a main part. In FIG. 1, the group relay RG-
1, RG-2 and inspection relays RA-1 to RA-8 are types having one make contact, and the selection relays RS-1 to RS-8 are provided with two sets of transfer contacts. Types are used, and as the common relays RC-1 and RC-2, types having two make contacts are used.

The sold-out detection switch 22 is provided for each column.
A total of 32 pieces are provided so as to correspond to each other, and when the stored products in the corresponding column are in an empty state or a state close to this (the state in which one stored product is one) The contact a is a normally open switch element that is turned on, and the contact b is a normally closed switch element that is turned on in other states.

The electromagnetic solenoid 23 as a driving device is also
A total of 32 columns are provided in a one-to-one correspondence with each column, and when the AC power supply 24 is energized, the stored products in the corresponding column are discharged. In FIG. 1, for convenience of explanation, the first to third
The second electromagnetic solenoids 23 are provided with subscripts 1 to 32 to distinguish them.

In this case, the group relay RG-1
Out of the electromagnetic solenoids 231 to 2332, (2n +
1) th and (2n + 2) th (where n = 0, 1,
2, 3, ... 13, 14) is provided so as to form an energization path for the electromagnetic solenoid via the normally closed contact (c-b) of the sold-out detection switch 22 corresponding to the electromagnetic solenoid. The group relay RG-2 has energization paths for the (2n + 3) th and (2n + 4) th electromagnetic solenoids among the electromagnetic solenoids 231 to 2332.
Sold-out detection switch 22 corresponding to the electromagnetic solenoid
Is provided so as to be formed through the normally closed contact (c-b).

The selection relay RS-1 includes first, second, third and fourth electromagnetic solenoids 231.
, 232, 233 and 234 groups are provided so as to be formed through the corresponding normally closed contacts (c-b) of the sold-out detection switch 22 corresponding to the groups, and other selection relays RS-2 to RS-2. The RS-8 includes the fifth, sixth, seventh and eighth to 29th, 30th, 31st and 32nd electromagnetic solenoids 235, 236, 237 and 238 groups to 2329, 2330, 2331 and respectively. 232 The electricity supply path to the group, sold-out detection switch 2 corresponding to them
It is provided so as to be formed between the two normally closed contacts (c-b).

The common relay RC-1 has an energization path for the odd-numbered electromagnetic solenoids among the electromagnetic solenoids 231 to 2332 between the normally closed contacts (c-b) of the sold-out detection switch 22 corresponding thereto. The common relay RC-2 is provided through the normally closed contact (c) of the sold-out detection switch 22 corresponding to the energization paths for the even-numbered electromagnetic solenoids among the electromagnetic solenoids 231 to 2332. -B) It is provided so that it may be formed via.

The inspection relay RA-1 includes the first, second, third and fourth electromagnetic solenoids 231 and 23.
The contact paths on the normally open side of the sold-out detection switch 22 corresponding to the energization paths for the groups 2, 23 3 and 234 (c-
The other inspection relays RA-2 to RA-8, which are provided so as to be formed through the space a), are fifth, sixth, seventh and eighth to 29th, 30th, 31st and 31st, respectively. The 32nd electromagnetic solenoids 235, 236, 237 and 238 group-
An energization path for the groups 2329, 2330, 2331 and 2332 is provided so as to be formed between the corresponding normally closed contacts (ca) of the sold-out detection switch 22.

The signal generating circuit 14 includes a photo coupler 14
The signal line 14b is electrically insulated from the AC power source 24 by a, and the detection signal NG1 is output through the signal line 14b.
Specifically, the photocoupler 14a connects a series circuit of the light emitting diodes 14c and 14d and the current limiting resistor 14e, which are connected in antiparallel, to both ends of the group relay RG1, and connects between the DC power supply terminal + Vcc and the ground terminal. Between the collector and emitter of the phototransistor 14f and the resistor 14g
And is connected in series, its operating state,
That is, the detection signal NG1 is output to the signal line 14b when the phototransistor 14f is on.

The current limiting resistor 14e has a low level such that the electromagnetic solenoids 231 to 2332 are not driven by the current flowing through the light emitting diodes 14c and 14d when the operation of the group relay RG-1 is stopped (OFF state). It is provided for the purpose of limiting
A noise absorbing capacitor 14h is connected between the signal line 14b and the ground terminal.

The signal generating circuit 15 also has the same structure as that of the signal generating circuit 14 described above.
(Composed of light emitting diodes 15c and 15d and phototransistor 15f), signal line 15b, current limiting resistor 15
e, a resistor 15g, and a capacitor 15h, and outputs the detection signal NG2 to the signal line 15b when the phototransistor 15f in the photocoupler 15a is on.

4 and 5, among the control contents by the bend terminal control device 12, parts relevant to the gist of the present invention are shown, and a description will be given below together with the related operation. That is, the bend terminal control device 12
Waits until it receives the discharge command signal Sa from the main controller 4 or until it receives the test signal Sb from the test sale switch 16 (step S1 (see FIG. 4), step S2 (see FIG. 5)).

When "YES" is determined in step S1, that is, when the release command signal Sa including the code that can specify the selected product is input in response to the operation of the product selection switch in the selection device 1, , Common relay RC
-1, RC-2, one for energizing an electromagnetic solenoid (231 to 232) for a column (hereinafter referred to as a designated column) in which a product specified by the release command signal Sa is stored is operated. (Step S3).

After this operation, a predetermined time τ1 elapses and then it is determined whether or not the designated column is an odd number column (steps S4 and S5). If the designated column is an odd number, selection relays RS-1 to RS-8
Among them, the one for energizing the electromagnetic solenoid for the designated column is operated (step S6). When the designated column is an even-numbered column, one of the selection relays RS-1 to RS-8 other than the one for energizing the electromagnetic solenoid for the designated column is operated (step S7).

Furthermore, after the execution of step S6 or S7 as described above, it is determined whether the designated column is the (2n + 1) th or (2n + 2) th column after waiting for a predetermined time τ2 to elapse (step S6). S8, S9). However, n = 0, 1, 2, 3, ...

If the designated column is the (2n + 1) th or (2n + 2) th column, the group relay RG-1 is operated (step S10), and the designated column is other than the above. That is, when the designated column is the (2n + 3) th or the (2n + 4) th, the group relay RG-2 is operated (step S11).

The control contents of steps S3 to S11 as described above will be described with reference to a concrete example (however, the sold-out switch 22 is in a steady state in which the contact points (c-b) are turned on). Assumed).

That is, when the column designated by the discharge command signal Sa is, for example, the first column, the common relay RC-1 is operated in step S3, and thereafter, when a predetermined time τ1 elapses, In step S6, the selection relay RS-1 is operated. Further, when a certain time τ2 has elapsed after this operation, the group relay RG-1 is operated in step S9. As a result, the group relay RG-1, from the AC power source 24 to the first electromagnetic solenoid 231,
Contact (c- on the left side in the figure of the selection relay RS-1
During a), the contacts are turned on via the common relay RC-1 between the contacts (c-b) of the sold-out switch 22, and the stored products in the first column are discharged.

If the column designated by the discharge command signal Sa is, for example, the second column, step S
In 3 while operating the common relay RC-2,
After that, when a certain time τ1 has passed, step S7
In, the selection relays RS-2 to RS-8 are operated. Furthermore, when a certain time τ2 has elapsed after this operation, the group relay RG-1 is determined in step S9.
To operate. This causes the group relay RG- from the AC power source 24 to the second electromagnetic solenoid 232.
1. Contact (c) on the left side of the selection relay RS-1 in the figure
-B), and the contact (c-b) of the sold-out switch 22 is energized via the common relay RC-2, so that the stored products in the second column are discharged.

In short, in steps S3 to S11, each relay RG-1, RG-2, RS-1 to RS-8, RC- in the energization control means 18 is based on the discharge command signal Sa.
1 and RC-2 are selectively operated to energize any one of the electromagnetic solenoids 231 to 2332.

However, after the energization of any one of the electromagnetic solenoids 231 to 2332 is started as described above,
After the elapse of a certain time τ3, the signal generation circuit 14
Alternatively, it is determined whether or not the detection signal NG1 or NG2 from 15 is input (steps S12 and S13).

Here, in the signal generating circuits 14 and 15, the internal phototransistors 14f and 15f are turned off when the corresponding group relays RG-1 and RG-2 are operating (the make contact is on). However, in the operation stop state of the group relays RG-1 and RG-2, the selection relays RS-1 to RS that are in operation at this point
-8 and the common relays RC-1, RC-2 and the electromagnetic solenoid 23, the light emitting diodes 14b, 14c,
Since current is supplied to 15b and 15c, the phototransistor 1
4f and 15f are turned on to detect signal NG1 or NG2
Will be output.

Therefore, "YES" in the step S13.
The state judged to be the group relay RG-1 or R
This corresponds to an abnormal state in which the relay RG-1 or RG-2 does not operate (short-circuit) despite issuing a command to operate G-2. In such a state, the abnormal signal SX is mainly controlled. Feedback to the device 4 side,
Each relay RG-1, RG-2, RS-1 to RS-8, R
The operations of C-1 and RC-2 are stopped (step S14,
After that, the process returns to the initial state (S15). In the main controller 4, when the abnormal signal SX is received, for example, the bill burr mechanism 9 or the coin mechanism 10 is sent.
It is the operation of returning the money that has been input through.

The state determined to be "NO" in step S13 corresponds to the state in which the group relay RG-1 or RG-2 is normally operated (short-circuited). In such a state, the relay RG is in contact. -1 or RG-2 is stopped (step S16), and then τ4
After the passage of time, the presence or absence of the detection signal NG1 or NG2 is judged again (steps S17 and S18).

The state determined to be "NO" in step S18 is that the relay RG- is issued even though the command to stop the operation of the group relay RG-1 or RG-2 is issued.
1 or RG-2 corresponds to an abnormal state in which the operation does not stop (a state in which a short circuit occurs due to contact welding). In such a state, the abnormal signal SY is fed back to the main controller 4 side, and other Relay RS-1 to RS
The operations of -8, RC-1, and RC-2 are stopped (steps S19 and S20), and thereafter the process returns to the initial state.
In addition, when the main control device 4 receives the above-mentioned abnormality signal SY, for example, it notifies that the contact welding has occurred in the group relay.

The state determined as "YES" in step S18 corresponds to the state in which the group relay RG-1 or RG-2 has normally stopped operating, and in such a state, the selection relay RS-1 ~ RS-8 operation is stopped (step S21), and further τ5
Wait for the passage of common relays RC-1, RC-2
Is stopped (steps S22 and S23).

The above selection relays RS-1 to R
At the operation stop timing of S-8 and the operation stop timing of the common relays RC-1 and RC-2, if it is determined whether or not the detection signal NG1 or NG2 is stopped, those relays RS-1 to RS -8, RC-
1, it becomes possible to detect the presence or absence of the contact welding state of RC-2.

After the execution of the step S23, the inspection relays RA-1 to RA-1 are waited until the predetermined time τ6 elapses.
Of the RA-8, the one corresponding to the electromagnetic solenoid that performed the product sales operation is operated (steps S24, S2).
5). Further, after a predetermined time τ7 has elapsed after this operation, it is determined whether or not the electromagnetic solenoid that has performed the above-described product selling operation is an odd-numbered one (steps S26, S).
27).

If the electromagnetic solenoid that has performed the product sale operation is an odd number, the selection relay RS-1
Among RS-8, those for energizing the electromagnetic solenoid are operated (step S28), and after this, wait for a predetermined time .tau.8 to elapse, and then detect signal NG1 or N
Whether or not G2 is input is determined (steps S29 and S3).
0) If the electromagnetic solenoid has an even number, the steps S28 and S29 are skipped and the step S30 is executed.

Here, in the state where the sold-out detection switch 22 is turned on between the contacts (c-b), that is, in the steady state where there is a stored product that can be discharged in the column, the inspection relay RA-1 is used as described above. ~ Even if RA-8 is operated,
The photocoupler 14a or 15a in the signal generating circuit 14 or 15 does not operate, and the detection signal NG1 or NG2 is not output.

Therefore, in a steady state where there is a stored product that can be discharged in the column, it is determined to be "NO" in step S30, and in this case, the inspection relay RA-1.
-RA-8 and selection relays RS-1 to RS-8
Are sequentially stopped (steps S31 and S32), and thereafter the initial state is restored.

On the other hand, when the sold-out detection switch 22 is turned on between the contacts (c-a), that is, when the stored product in the column is empty or close to this (one stored product is one). In this case, the null signal SZ is fed back to the main control unit 4 side, and the serial number of the column exhibiting the above state is stored (steps S33, S34), after which the initial state is returned to. . still,
In the main controller 4, when the empty signal SZ is received, the sold-out lamp 6 corresponding to the column is turned on. Also, the stored data of the above column number is
Sold-out detection switch 22
Is initialized when the contact between the contacts (c-b) returns to the ON state.

On the other hand, in step S2 shown in FIG.
If it is judged as "ES", that is, the test sale switch 16
When the test signal Sb is output from, it is determined whether or not the serial number of the column corresponding to the test sale switch 16 is stored (step S35).

Here, when it is determined that the serial number of the column is not stored (when there is a stored product that can be released in the column), a compulsion to release only one product in the column. After executing the discharge routine RK, the process returns to the initial state. Therefore, it is possible to confirm that the product selling operation is normally performed based on whether or not such a product releasing operation is performed. The forced release routine R
K includes the same steps as steps S3 to S23 described above.

On the other hand, when it is determined in step S35 that the serial number of the column is stored (when the column is empty or the number of stored products is one), the inspection is performed. Relays RA-1 to RA-8
One of the columns corresponding to the column is operated (step S36). Then, after a predetermined time τ9 has elapsed after this operation, it is determined whether or not the column is an odd number column (steps S37 and S38).

If the above column is an odd number,
One of the selection relays RS-1 to RS-8 for energizing the electromagnetic solenoid corresponding to the column is operated (step S39), and thereafter, a predetermined time τ10.
It is determined whether or not the column is the (2n + 1) th or (2n + 2) th column (steps S40 and S41), but if the electromagnetic solenoid is an even number, the above step is performed. Steps S41 and S40 are jumped to execute step S41.

If "YES" is determined in the above step S41, that is, the column in which the serial number is stored is (2n
If it is (+1) or (2n + 2) th, the group relay RG-1 is operated (step S42), and if the column storing the serial number is other than the above, that is, the column is (2n + 3). Or (2n +
If it is the fourth), the group relay RG-2 is operated (step S43).

The control contents in steps S36 to S43 as described above will be described below with reference to a concrete example. That is, when the test signal Sb is output from the test sale switch 16, if the column corresponding to the test sale switch 16 is, for example, the first column, the inspection relay RA-1 is operated. At the same time, when a predetermined time τ9 has elapsed, the selection relay RS-1 is operated, and the predetermined time τ10
When the time elapses, the group relay RG-1 is operated.

In this case, since the sold-out detection switch 22 corresponding to the above column is turned on between the contacts (ca), the AC power source 24 is connected to the group relay RG- to the first electromagnetic solenoid 231. 1. Between the contacts (ca) on the left side of the selection relay RS-1, the contacts (ca) of the sold-out detection switch 22 and the inspection relay RA-1 are energized. As a result of forcibly energizing the electromagnetic solenoid 231 in this way, if one product remains in the column, that product will be released, and the product selling operation will be performed by the release operation. You will be able to confirm that it is done normally.
If the column is completely empty, the product is not discharged, but the electromagnetic solenoid 231
It is possible to confirm that the product sales operation is normally performed by the operation sound of.

If the column corresponding to the test sale switch 16 that has output the test signal Sb is the second column, for example, the inspection relay RA1 is operated, and thereafter a fixed time τ9 elapses. Then, the group relay RG-1 is operated.

As a result, the second electromagnetic solenoid 2
AC power source 24 to group relay RG-
1. Contact on the left side of the selection relay RS-1 (c-
b), between the contacts (c-a) of the sold-out detection switch 22,
Power is supplied via the inspection relay RA-1,
Also in this case, it is possible to confirm whether or not the product selling operation is normally performed based on the energized state of the electromagnetic solenoid 232.

However, after energization of any one of the electromagnetic solenoids 231 to 2332 as described above,
Waiting for a fixed time τ11 to elapse, and then group relays RG-1, RG-2, selection relays RS-1 to R
The operation of S-8 and the inspection relays RA-1 and RA-2 is stopped (steps S44, S45, S46, S47), and thereafter the initial state is restored.

In short, according to the configuration of the present embodiment described above, the bend terminal control device 12 receives the discharge command signal Sa from the main control device 4 side when the energization selecting means 18 is operated.
Common relays RC1 and RC2, selection relays RS-1 to RS-8, group relays RG-1 and RG-
The predetermined relays of the two are sequentially operated at different timings to form the electromagnetic solenoid energization path specified by the release command signal Sa among the electromagnetic solenoids 231 to 2332, thereby selling the stored products in the column. It is something to do.

After performing the selling operation, the bend terminal control device 12 sequentially stops the relays in the above-described operation state at different timings, and the signal generation circuit 14 at each operation stop timing. The welded state of each relay is detected based on the presence / absence of the detection signal NG1 from the signal generator or the detection signal NG2 from the signal generation circuit 15.

The bend terminal control unit 12 checks the inspection relays RA-1 to RA- after executing the sales operation as described above.
After operating the one corresponding to the column that performed the sales operation, the selection relays RS-1 to RS-
8. By sequentially operating a predetermined relay among the group relays RG-1 and RG-2 at different timings,
The operation state of the sold-out detection switch 22 (that is, the state that the products stored in the column are sold out) is the detection signal NG1.
Alternatively, it is judged by the presence or absence of input of NG2,
When it is determined that the column is sold out, the empty signal SZ is fed back to the main controller 4 to turn on the sold out lamp 6 corresponding to the column.

In this case, the sold-out detection switch 22
Need only be incorporated into an AC wiring system including the electromagnetic solenoids 231 to 2332. Therefore, as in the conventional configuration, it is necessary to provide the AC wiring for the electromagnetic solenoid and the DC wiring for the sold-out detection switch as independent systems. Since the wiring can be simplified and the operating state of the sold-out detection switch 22 can be reliably detected without being affected by noise, the sold-out display based on the sold-out detection switch 22 can be displayed. There is no risk of accidental execution.

When the test sale switch 16 is operated in the state where the sold-out display is performed as described above, that is, the sale operation of the product is prohibited, the bend terminal control device 12 is sold-out detection switch 22. Since the electromagnetic solenoid corresponding to the sold-out column is formed through the normally-open side contact (c-a), the selling operation is forcedly performed. Based on this, it becomes possible to easily confirm whether or not the product selling operation is normally performed.

A second embodiment of the present invention is shown in FIGS. 6 to 8, and only the parts different from the first embodiment will be described below. That is, in this embodiment, as shown in FIG. 6, the signal generating circuits 14 and 15 in the first embodiment are removed, and instead of this, a current transformer 25 as current detecting means.
Is provided. In this case, the current transformer 25 is interposed in the common bus bar of the energization path from the AC power source 24 to the electromagnetic solenoids 231 to 2332 in order to detect the current flowing through the group relays RG-1 and RG-2. When the current is detected, the detection signal SN is output to the signal line 25a that is electrically insulated from the AC power supply 24. The detection signal SN is given to the bend terminal control device 12 (see FIG. 2 in the first embodiment) via the input buffer 17.

7 and 8 show the control contents by the bend terminal control device 12 in this embodiment, which will be described below. That is, in these FIG. 7 and FIG. 8, step S1 to step S12, step S1
4 to S17, steps S19 to S29, step S31
~ 46 and the contents of the forced release routine RK are the same as in the first embodiment.

After the step S10 of operating the group relay RG-1 or the step S10 of operating the group relay RG-2 is executed, the step S1 is performed after the time τ3 set in step S12 has elapsed.
At 3 ', it is determined whether or not the detection signal SN from the current transformer 25 is input. The state determined to be "NO" corresponds to an abnormal state in which the relay RG-1 or RG-2 does not operate even though the command to operate the group relay RG-1 or RG-2 is issued. In such a state, step S14 of feeding back the abnormal signal SX to the main control device 4 side, the relays RG-1 and RG-.
2, step S15 of stopping the operations of RS-1 to RS-8, RC-1 and RC-2 is executed, and then the process returns to the initial state.

The state judged as "YES" in step S13 'is the group relay RG-1 or RG-.
2 corresponds to a normally operated state, and in such a state, the control after step S16 for stopping the operation of the relay RG-1 or RG-2 is executed.

After execution of step S16 for stopping the operation of the group relay RG-1 or RG-2, step S1
In step S18 ', which is performed after the time τ4 set in 7 has elapsed, it is determined again whether or not the detection signal SN is input. Here, in the state of being judged as "YES", the relay RG-1 or RG- is issued even though the command to stop the operation of the group relay RG-1 or RG-2 is issued.
2 corresponds to an abnormal state in which the operation does not stop (a state in which contact welding occurs). In such a state, step S19 of feeding back the abnormal signal SY to the main control device 4 side, other relays RS-1 to RS-1. RS-8, RC-
1. The step S20 of stopping the operation of the RC-2 is executed, and thereafter, the process returns to the initial state.

The state determined to be "NO" in step S18 'is the group relay RG-1 or RG-2.
Corresponds to the state in which the operation is normally stopped. In such a state, the selection relays RS-1 to RS
The control after step S21 for stopping the operation of -8 is executed.

In step S30 'which is performed at a predetermined timing after the operation of the inspection relays RA-1 to RA-8, it is determined whether or not the detection signal SN is input. in this case,
In the state where the sold-out detection switch 22 is turned on between the contacts (c-b), that is, in the steady state in which there is a stored product that can be discharged in the column, the inspection relays RA-1 to R-R are as described above.
Even if A-8 is operated, no current flows in the current transformer 25, and the detection signal SN is not output.

Therefore, in a steady state where there is a stored product that can be discharged in the column, it is determined to be "NO" in step S30 '. In this case, the inspection relay RA-
1-RA-8 and selection relays RS-1 to RS-
Steps S31 and S32 for sequentially stopping the operation of S8 are executed, and thereafter, the initial state is restored.

On the other hand, when the sold-out detection switch 22 is turned on between the contacts (c-a), that is, when the stored product in the column is empty or close to this (one stored product is one). In this case, a current flows through the current transformer 25 in response to the operation of the inspection relays RA-1 to RA-8, so that the detection signal SN is output.

Therefore, when the inside of the column is sold out, it is determined to be "YES" in step S30 '. In this case, the empty signal SZ is fed back to the main control unit 4 side and the steps after step S33. Execute control.

In short, the structure of the second embodiment also has the same effect as that of the first embodiment. Particularly, according to the structure of the present embodiment, the signal generating circuit 14 of the first embodiment is used. Since the functions of 15 and 15 can be replaced by one current transformer, the hardware configuration can be simplified.

As shown in FIG. 9 showing the third embodiment of the present invention, by providing both the signal generating circuits 14 and 15 and the current transformer 25, the operational reliability is improved. Is also good.

In addition, the present invention is not limited to the above-described embodiments, and may be modified in various ways without departing from the scope of the invention, for example, a motor may be used as a driving device. is there.

[0082]

As is apparent from the above description, in the control device for the vending machine according to the first and second aspects, the sold-out detection switch can be incorporated in the AC wiring system constituting the power supply of the drive device. As a result, it is possible to realize cost reduction due to simplification of wiring work, and
It is possible to reliably prevent a situation where the sold-out display function using the sold-out detection switch malfunctions due to noise from the AC power supply, such as when the sold-out detection switch is incorporated in a DC signal system. In particular, in the control device for an automatic vending machine according to the second aspect, it is sufficient to provide one current detecting means, and the hardware configuration can be simplified.

Further, in the control device for a vending machine according to claim 3, when the test sale switch is operated in a state where the sold-out detection switch detects the sold-out state, the energization path of the drive device passes through the sold-out detection switch. Since it is configured as described above, it is possible to easily confirm whether or not the product sale operation is normally performed based on the presence or absence of the operation of the electromagnetic solenoid, which is a beneficial effect.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a main part showing a first embodiment of the present invention.

FIG. 2 is a diagram schematically showing an electrical configuration of a bend terminal.

FIG. 3 is a diagram schematically showing an electrical configuration of a vending machine.

FIG. 4 is a flowchart 1 showing the control contents of the bend terminal control device.

FIG. 5 is a flowchart showing the control contents of the bend terminal control device, part 2

FIG. 6 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 7 is a view corresponding to FIG.

FIG. 8 is a view corresponding to FIG.

FIG. 9 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

[Explanation of symbols]

In the figure, 1 is a selection device, 4 is a main control device, 11 is a bend terminal, 12 is a bend terminal control device (control means), 14, 1
5 is a signal generating circuit (operating state detecting means), 14a, 15
a is a photocoupler, 14b and 15b are signal lines, 16 is a test sale switch, 18 is an energization control means, RG-1,
RG-2 is a group relay (main switch), RS-
1 to RS-8 are selection relays (sub switches),
RC-1 and RC-2 are common relays (sub switches),
RA-1 and RA-2 are inspection relays (inspection switches), 22 is a sold-out detection switch, 23 is an electromagnetic solenoid (driving device), 24 is an AC power supply, 25 is a current transformer, 25
a indicates a signal line.

Claims (3)

[Claims] 1. A plurality of drive devices, which are respectively provided in a plurality of columns and perform a discharging operation of stored products in the corresponding columns when energized by an AC power source, and a selection for a main switch and each drive device. Energization selection means configured by combining a plurality of sub-switches for electrically energizing, and a signal line that is connected in parallel with the main switch and is electrically insulated from the AC power supply in a state where current flows. The operation state detection means configured to output a detection signal, and the main switch and the sub switch in the energization selection means are sequentially operated at different timings when a discharge command signal is given, and the main switch and the sub switch are sequentially operated at different timings. The operation of forming the energization path of the drive device specified by the discharge command signal is executed, and the operation or operation of the main switch and the sub switch is performed. Control means having a function of detecting each short-circuited state of the main switch and the sub switch based on the presence or absence of a detection signal from the operation state detection means at the stop timing, and a state in which the stored goods in the column are empty Or a plurality of sold-out detection switches equipped with a normally-open switch element that is turned on when the state is close to this and a normally-closed switch element that is turned on in other states, and a normally-open switch of the sold-out detection switch in the operating state. An inspection switch that forms an energization path through the element, the operating state detection means, and the drive device, and the normally-closed switch element of the sold-out detection switch is connected to the energization path of the drive device through the energization selection means. After intervening, the control means is caused to operate the inspection switch after executing the energization path forming operation of the drive device. In addition to the above, the vending machine control is characterized by adding a function of displaying the sold-out state by judging the operating state of the sold-out detection switch based on the presence or absence of a detection signal from the operating-state detecting means during this operation. apparatus. 2. A plurality of drive devices, each of which is provided in each of the plurality of columns and which discharges the stored products in the corresponding column when energized by an AC power supply, and a main switch and a selection for each drive device. Energization selection means configured by combining a plurality of sub-switches for electrically energizing electricity, and provided so as to detect a current flowing through the main switch, and electrically insulated from the AC power supply in the detection state. Current detection means configured to output a detection signal to the signal line and a main switch and a sub switch in the energization selection means which are sequentially operated at different timings when a discharge command signal is given The main switch and the sub-switch are operated together with the operation of forming the energization path of the drive device designated by the release command signal of the device. Control function having a function of detecting each short-circuited state of the main switch and the sub switch based on the presence or absence of a detection signal from the current detection means at the timing of the operation or the operation stop timing, and the stored goods in the column are empty. A plurality of sold-out detection switches each having a normally-open switch element that is turned on when it is in a state close to this state and a normally-closed switch element that is turned on in other states, and the sold-out detection switch in an operating state. A normally open switch element, the operating state detecting means, and an inspection switch that forms an energization path through the drive device, and the normally closed switch element of the sold-out detection switch is the drive device through the energization selecting means. Of the inspection device after the execution of the energization path forming operation of the drive device with respect to the control means. Automatic vending characterized by adding a function of operating the switch and judging the operating state of the sold-out detection switch based on the presence or absence of a detection signal from the current detection means at the time of this operation and displaying a sold-out display. Machine control device. 3. A test sale switch for confirming whether or not a product sale operation is normally performed according to energization of a drive device, and the control means performs the test sale in a state where a sold-out display is displayed. When the switch is operated, by operating the inspection switch and the energization selection means, the energization path of the drive device is formed through the inspection switch, the normally open switch element of the sold-out detection switch, and the energization selection means. The control device for the vending machine according to claim 1, wherein the control device is configured to: