JPH04177593A - Goods output device equipped with fault detecting function for automatic vending machine - Google Patents

Abstract

PURPOSE:To reduce the number of relays by permitting currents to flow on all the goods output device from a selection relay forming an S group, a remote control relay forming a G group, and a group relay forming a C group. CONSTITUTION:The selection relays 11-18 of the S group to which instruction columns belong are operated by the second control signal of a second control means, and are connected to first and second makecontacts 30, 32 or first and second break-contacts to which the instruction columns are connected. Also, the remote control relay 20 is connected to the C group to which the instruction column belongs. A small detecting current by which no goods output device can be driven is permitted to flow on a targeted goods output device via a current limitation circuit, and detection circuits 34, 38 detect the presence/ absence of the detecting current in such case. A decision means decides abnormality in each relay by a first control signal and the detecting current detected by the detection circuits 34, 38. Thereby, it is possible to obtain a fault detecting function only by providing the current limitation circuit and the detection circuits 34, 38 at the group relays 30, 32.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a product dispensing device for a vending machine, and particularly to a product dispensing device for a vending machine. The present invention relates to a product dispensing device equipped with a failure detection function of a relay provided for supplying drive current from a power source to a product dispensing device such as a bend solenoid.

(Prior Art and Problems to be Solved by the Invention) As the above-mentioned product dispensing device of a conventional vending machine, one make contact type relay was used for the product dispensing device of one column. Accordingly, when a product is to be carried out from a column that has been instructed to be carried out, a drive current is applied to a relay provided in that column to operate a bend solenoid of a bending device of that column and carry out the product.

However, in recent years, the number of columns installed in vending machines has increased, and when one relay is installed in one column, the number of parts increases, and the area of the PC board on which this relay is attached also increases. .

Therefore, for the purpose of reducing the number of parts, product dispensing devices have been developed that group multiple columns and employ relays with two contacts.

However, this product dispensing device still has the problem of a large number of parts.

Furthermore, if the product dispensing device fails, it is necessary to determine which relay has failed. Therefore,
There is a problem in that a failure detection circuit must be provided inside the product dispensing device, or the failure detection circuit becomes extremely complex because of the large number of relays.

Therefore, the product dispensing device for a vending machine of the present invention is equipped with a failure detection function, minimizes the number of relays used, improves product reliability, and provides a compact and low-cost product dispensing device. It is something.

[Structure of the Invention] (Means for Solving the Problems) A product dispensing device for a vending machine having a failure detection function according to claim 1 of the present invention selects a column for which delivery is instructed from among a plurality of columns. In a product dispensing device of a vending machine that supplies drive current from a power source to a product dispensing device such as a bend solenoid in the column, the first make contact, first break contact, and second make contact of a two-transfer contact type selection relay are used. A product delivery device is connected in series to each of the contact and the second break contact to form a plurality of S groups in which four columns are one group, and each S group has a first make contact, a first break contact, and a second break contact. By connecting each of the make contact and the second break contact in parallel,
the first C group of each selection relay.
C formed by the product delivery device connected to the make contact
Group and 2 transfer contact type common relay 1st
Connect the make contact or the first break contact, and connect the C group formed by the product delivery device connected to the first break contact of each selection relay and the first break contact or first make contact of the common relay. Then, the C group formed by the product delivery device connected to the second make contact of each selection relay is connected to the second make contact or the second break contact of the common relay, and the second break contact of each selection relay is connected to the second make contact or the second break contact of the common relay. The second break contact or the second meter contact of the common relay is connected to the C group formed by the product discharging device connected to The second transfer contacts are connected in parallel to form two C groups, and the two C groups and the transfer contacts of the two transfer contact type group relays are respectively connected in series, and the two transfer contact type group relays are connected in series. One end of a current limiting circuit is connected in series to the break contact of each of the two current limiting circuits, and a detection circuit such as a photocoupler is provided to detect the current flowing through the two current limiting circuits, and the first transfer contact and the second transfer contact of the common relay are connected in series. are connected in parallel and connected in series with one pole of the power supply, and the make contacts of the two group relays and the other ends of the current limiting circuit are connected in parallel and connected in series with the other pole of the power supply. Connect, select the desired C group from the four C groups by common relay, and connect multiple S
The selection relay selects the target S group from the group, the group relay selects the target C group from the two C groups, and outputs the first control signal to cause the drive current to flow to the target product delivery device. C, to which the target product carrying out device belongs.
A group is selected by a common relay, an S group to which the target product carrying out device belongs is selected by a selection relay, and a small detection current that does not drive the product carrying out device is passed through a current limiting circuit to the target product carrying out device. A second control means for outputting a second control signal is provided, and a determination means is provided for determining whether there is an abnormality in each relay based on the first control signal, the second control signal, and the detection state of the detection circuit.

According to a second aspect of the present invention, the product dispensing device for a vending machine equipped with a failure detection function selects a column that has been instructed to be carried out from among a plurality of columns, and selects the column that has been instructed to be carried out from among a plurality of columns.

In a product dispensing device of a vending machine that supplies drive current from a power source to a product dispensing device such as a bend solenoid in a vending machine, the first make contact, the first break contact, the second make contact, and the second make contact of a two-transfer contact type selection relay are used. 2
A product discharging device is connected in series to each of the break contacts to form a plurality of S groups in which four columns constitute one group, and each S group has a first make contact, a first break contact, a second make contact, and a second make contact. Two break contacts are connected in parallel to form four C groups, four C groups and four transfer contact type common relay break contacts are connected in series, and each S group is formed into multiple groups. A plurality of C groups are formed by connecting all the first transfer contacts and second transfer contacts in each divided group in parallel, and these plural C groups and the same number of transfer contacts as the C group are formed. transfer contacts of a plurality of transfer contact type group relays are connected in series, one end of a current limiting circuit is connected in series to the break contacts of a plurality of transfer contact type group relays, and the current flowing through the current limiting circuit is detected. The transfer contacts of the four common relays are connected in parallel and connected in series with one pole of the power supply, and the make contacts of the plurality of group relays and the other end of the current limiting circuit are respectively provided. are connected in parallel and connected in series with the other one pole of the power supply, a common relay selects a target C group from four C groups, and a selection relay selects a target S group from a plurality of S groups. , a first control means is provided for outputting a first control signal to cause a group relay to select a target C group from a plurality of C groups and to cause a drive current to flow through the target product carry-out device; A common relay selects the C group to which the target product carry-out device belongs, a selection relay selects the S group to which the target product carry-out device belongs, and a small detection current that does not drive the product carry-out device passes through a current limiting circuit to the target product carry-out device. A second control means is provided for outputting a second control signal so as to flow, and a determination means is provided for determining whether there is an abnormality in each relay based on the first control signal, the second control signal, and the detection state of the detection circuit. .

The product dispensing device equipped with a failure detection function for a vending machine according to claim 3 of the present invention selects a column for which delivery is instructed from among a plurality of columns, and drives the product dispensing device such as a bend solenoid for the selected column. In a product dispensing device of a vending machine that supplies current from a power source, a product dispensing device is connected in series to each of the first make contact, first break contact, second make contact, and second break contact of a two-transfer contact type selection relay. are connected to form a plurality of S groups with four columns as one group, and the first make contact, first break contact, second make contact, and second break contact of each S group are connected in parallel. Te4
The four C groups and the transfer contacts of the four transfer contact type group relays are connected in series, respectively, and one end of the current limiting circuit is connected to the make contact of the four transfer contact type group relays. A detection circuit such as a photocoupler is connected in series and detects the current flowing through the current limiting circuit, respectively.
Each S group is divided into a plurality of groups, and all the first transfer contacts and second transfer contacts in each divided group are connected in parallel to form a plurality of C groups, and these plural C groups and The C group and one end of the same number of make contact type common relays are connected in series, and the break contacts of the four group relays and the other ends of the current limiting circuit are connected in parallel to one pole of the power source. The other ends of the plurality of common relays are connected in parallel and connected in series with the other one pole of the power supply, and a target C group is selected from the plurality of C groups by the common relay, and the plurality of common relays are connected in series. A selection relay selects the desired S group from the S groups, and 4
A first control means is provided for outputting a first control signal so as to cause a group relay to select a target C group from the three G group rapes and to cause a drive current to flow through the target product carry-out device; A group is selected by a common relay, an S group to which the target product carrying out device belongs is selected by a selection relay, and a small detection current that does not drive the product carrying out device is passed through a current limiting circuit to the target product carrying out device. A second control means for outputting a second control signal is provided, and a determination means is provided for determining whether there is an abnormality in each relay based on the first control signal and the detection state of the first control signal and the detection circuit.

(Function) The function of the product dispensing device having a fault detection function for a vending machine according to claim 1 having the above configuration will be explained.

A column that is instructed to be carried out from among a plurality of columns by the first control signal of the first control means (hereinafter referred to as the designated column)
Activates the selection relay of the S group to which the first column is connected. 2nd make contact or 1st make contact. Connect to the second break contact. Further, a common relay is connected to the C group to which the instruction column belongs.

Furthermore, the group relay of the C group to which the instruction column belongs is turned ON.

In response to the second control signal from the second control means, the selection relay of the S group to which the specified column belongs is actuated, and the selection relay of the S group to which the designated column belongs is operated to select the first and second make contacts or the first and second make contacts connected to the designated column. Connect to the second break contact. Further, a common relay is connected to the C group to which the instruction column belongs. Then, a small detection current that does not drive the target product carry-out device is passed through the current limiting circuit to the target product carry-out device. In this case, a detection circuit detects the presence or absence of this detection current.

The determination means determines whether there is an abnormality in each relay based on the first control signal and the detection current detected by the detection circuit.

As a result, a failure detection function can be provided by simply providing a current limiting circuit and a detection circuit in the group relay.
The circuit does not become complicated.

Furthermore, it is possible to easily determine in which relay an abnormality has occurred during the product carrying-out operation in the designated column.

The operation of the product dispensing device having a failure detection function for a vending machine according to claim 2 having the above configuration will be explained.

A column that is instructed to be carried out from among a plurality of columns by the first control signal of the first control means (hereinafter referred to as the designated column)
Activates the selection relay of the S group to which the first column is connected. 2nd make contact or 1st make contact. Connect to the second break contact. Also, the common relay of the C group to which the instruction column belongs is turned on.

Furthermore, the group relay of the C group to which the instruction column belongs is turned ON.

In response to the second control signal from the second control means, the selection relay of the S group to which the designated column belongs is actuated, and the selection relay of the S group to which the designated column belongs is operated to select the first and second make contacts or the first and second make contacts connected to the designated column. Connect to the second break contact. Also, the common relay of the C group to which the instruction column belongs is turned on. Then, a small detection current that does not drive the target product carry-out device is passed through the current limiting circuit to the target product carry-out device. In this case, a detection circuit detects the presence or absence of this detection current.

The determination means determines whether there is an abnormality in each relay based on the first control signal and the detection current detected by the detection circuit.

The operation of the product dispensing device having a failure detection function for a vending machine according to claim 3 having the above configuration will be explained.

A column that is instructed to be carried out from among a plurality of columns by the first control signal of the first control means (hereinafter referred to as the designated column)
Activates the selection relay of the S group to which it belongs, and selects the first column connected to that instruction column. 2nd make contact or 1st make contact. Connect to the second break contact. Also, the common relay of the C group to which the instruction column belongs is turned on.

Furthermore, the group relay of the C group to which the instruction column belongs is turned ON.

In response to the second control signal from the second control means, the selection relay of the S group to which the designated column belongs is actuated, and the selection relay of the S group to which the designated column belongs is actuated so that the designated column is connected to the first and second make contacts or the first and second make contacts. Connect to the second break contact. Also, the common relay of the C group to which the instruction column belongs is turned on. Then, a small detection current that does not drive the target product carry-out device is passed through the current limiting circuit to the target product carry-out device. In this case, a detection circuit detects the presence or absence of this detection current.

The determination means determines whether there is an abnormality in each relay based on the first control signal and the detection current detected by the detection circuit.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

The vending machine of this embodiment has 32 columns, and each of the 32 columns is assigned a column number.

FIG. 1 is a block diagram of the product dispensing device 1 of the vending machine.

FIG. 2 shows a relay drive circuit 2 in the product dispensing device 1.
FIG.

Reference numeral 3 is a mask controller of the vending machine.

Reference numeral 4 denotes a control unit, which includes a microcomputer 5 and a memory device 6.
and input/output port 7. A mask controller 3 and a relay drive circuit 2 are connected to this control section 4. The microcomputer 5 receives the product delivery command from the mask controller 3 and outputs the product delivery result to the mask controller 3. Further, a control signal is outputted to the relay drive circuit 2 via the input/output port 7 to operate the bending device of the designated column, and furthermore, a relay 0N10FF monitor signal is inputted from the relay drive circuit 2.

Reference numeral 10 designates a solenoid of a bending device provided in each column for transporting products. When a predetermined drive current flows through the solenoid 10, the bending device is operated and the product is transported out. Then, the solenoid 10 provided in the column with column number 1 is set as the first solenoid 10, and the solenoid 10 provided in the column with column number 1 is set as the first solenoid 10.
The solenoid 10 provided in the column with column number n will be referred to as the second solenoid 10, and hereinafter, the solenoid 10 provided in the column with column number n will be referred to as the n-th solenoid 10 (in addition,
In the drawings, for convenience of explanation, for example, the first solenoid is referred to as solenoid (2).

Reference numeral 11 denotes a two-transfer contact type first selection relay (in the figure, it is designated as R3-1). This first
One end of the first solenoid 10 is connected in series to the first meter contact of the selection relay 11, one end of the second solenoid 10 is connected in series to the first break contact, and the second make contact and second break contact are connected in series. Third and fourth solenoids 0 are connected in series to the contacts, respectively.

Reference numeral 12 denotes a two-transfer contact type second selection relay (in the figure, it is designated as R8-2). This second
Fifth to eighth solenoids IO are connected to the selection relay 12.

Further, the relay drive circuit 2 is provided with third to eighth selection relays. The ninth to twelfth solenoids 10 are connected to this third selection relay 13 (indicated as R5-3 in the figure).

The 4th selection relay has 13th to 16th solenoids 1
0 is connected. The 17th to 20th solenoids 10 are connected to the fifth selection relay 15. 6th.
Similarly, four solenoids 10 are connected to each of the 7th solenoid 10, and the 29th to 32nd solenoid 10 are connected to the 8th selection relay 18 (indicated as R5-8 in the figure).
is connected.

and 4 connected to each selection relay.
0 or 1 solenoid form an S group.

Moreover, the 1.5.9.13.
17.21.25.29 The other ends of the solenoids 10 are connected in parallel to form the 1st C group. 2.6.10.14.18.22.26.30 connected to the first break contact of the 1st to 8th selection relays 11 to 18
The other ends of the solenoids 10 are connected in parallel to form a 20th group. 1st~8th selection relay 11~
3.7.11.1 connected to the second meter contact of 18
The other ends of the 5.19.23.27.31 solenoids IO are connected in parallel to form the 3rd C group.

4.6.12.16.20.24 connected to the second break contact of the 1st to 8th selection relays 11 to '1g
．． The other ends of the 28.32 solenoids 10 are connected in parallel to form the 40th group.

Furthermore, the first to eighth selection relays 11 to 18
The transfer contacts are all connected in parallel to form a first G group. 1st~8th selection relay 11~
By connecting all 18 second transfer contacts in parallel, m
They form a 2G group.

Reference numeral 20 indicates a two-transfer contact type common relay (indicated as RC in the figure). A second C group is connected in series to the first make contact of this common relay 20. A tenth group is connected in series to the first break contact. A 40th group is connected in series to the second make contact.

A 30th group is connected in series to the second break contact.

Reference numeral 30 indicates a transfer contact type first group relay (indicated as RG-1 in the figure).

The first transfer contact of this first group relay 30
G groups are connected in series.

Reference numeral 32 indicates a transfer contact type first group relay (indicated as RG-2 in the figure).

The transfer contact of this second group relay 32 has a second
G groups are connected in series.

Reference numeral 33 is an AC power source ]00■.

The two transfer contacts of the common relay 20 are connected in parallel and connected in series with one pole of the power supply 32. Further, the make contacts of the two group relays 30 and 32 are connected in parallel and connected in series with the other one pole of the power source 33.

Reference numeral 34 is a first detection resistor having a resistance value R2.

One end of this first detection resistor 34 is connected to the first group relay 3
0 break contact. The detection current flowing through the first detection resistor 34 is set to a small value that does not drive the selection relay and the common relay.

Reference numeral 36 denotes a first photocoupler, one end of whose current input terminal is connected to the other end of the first detection resistor 34 , and the other end of the current input terminal is connected to the other one pole of the power source 33 . Then, when a detection current flows through the photodiode 36b, a signal is input to the base of the phototransistor 36a, and a first NG signal (in the figure,
NGI) is output to the control unit 4. That is, when the detection current flows, the first photo coupler 3B
The NG signal is output to the control section 4. Note that a DC voltage of 24V is applied to the collector of the phototransistor 36a. Further, the emitter of the phototransistor 36a is grounded via a resistor 3Bc having a resistance value R1.

Reference numeral 38 is a second detection resistor having a resistance value R2.

One end of this second detection resistor 38 is connected to the second group relay 3
It is connected to the break contact of 2. The detection current flowing through the second detection resistor 38 is set to a small value that does not drive the selection relay and the common relay.

Reference numeral 40 denotes a second photocoupler, one end of which has a current input terminal connected to the other end of the second detection resistor 38 , and the other end of the current input terminal connected to the other one pole of the power source 33 . When a detection current flows through the photodiode 40b, a signal is input to the base of the phototransistor 40a, and a second NG signal (in the figure), which is a failure detection signal, is sent from the emitter.
NG2) is output to the control section 4. In other words, when the detection current flows, the second photo coupler 40 becomes "1".
The NG signal is output to the control section 4. Note that a DC voltage of 24 cm is applied to the collector of the phototransistor 40a. Further, the emitter of the phototransistor 40a is grounded via a resistor 40c having a resistance value R1.

Next, using the product dispensing device 1 configured as described above, the process of determining the failure state of each relay provided in the relay drive circuit 2 while controlling the delivery of products in a designated column is controlled by the microcomputer 5 shown in FIG. Explain based on flow. This control flow consists of an initial state and seven steps. The upper row describes the case where products with column numbers or odd numbers are carried out, and the lower row describes the case where products with even column numbers are carried out. There is. Then, after controlling each relay ON10FF in each step, detect an NG signal after 100ms, and if it is equal to 0N10FF of NG in the control flow of Fig. 3, proceed to the next step, otherwise. , group relay (RG), selection relay (RS), and common relay (RC) in this order, and returns the reason why it is not possible to proceed to the next step to the mask controller 3. Furthermore, when the product has been normally carried out, a notification to that effect is returned to the mask controller 3.

First, the control state when products are carried out from columns with odd column numbers will be explained. In addition, in this state,
Common relay 20 is always OFF.

In the initial state, the group relay, selection relay, first NG signal, and second NG signal are turned off. If both the first NG signal and the second NG signal detected in this state are OFF, the process proceeds to step 3, and if not, it is determined that one of the relays is welded.

In step 3, the two group relays continue the state of step 1, and the selection relays are turned on as many selection relays as the designated column belong to. The first NG signal and the second NG signal are turned ON. In this state, if both the detected first NG signal and second NG signal are ON, the process proceeds to step 4, and if not, it is determined that the selection relay is not ON and welding has occurred.

In step 4, all the group relays of the G group to which the designated column belongs are turned ON, and the other group relays are kept OFF. The selection relay continues in step 3. The first NG signal is OFF if the G group to which the designated column belongs is the first G group,
The second NG signal is the second G in the G group to which the specified column belongs.
If it is a group, turn it off. If the first NG signal and second NG signal detected in this state meet the above conditions, proceed to step 5, otherwise the group relay is turned ON.
It is determined that the welding occurred without any failure.

In step 5, the group relay that was turned on in step 4 is turned off, and the other group relay is kept in the OFF state. That is, both group relays are turned off. The selection relay continues in step 3. The first NG signal and the second NG signal are both turned ON. The first detected in this state
If the NG signal and the second NG signal are both ON, proceed to step 7, otherwise the group relay is OFF.
It is determined that the welding occurred without any failure.

In step 7, the group relay continues in the state of step 5, and all selection relays are turned off. Both the first NG signal and the second NG signal are turned off.

In this state, the detected first NG signal and the second
If the G signal or both are OFF, the product in the designated column is carried out, and if not, it is determined that the selection relay is not OFF and has been welded.

Next, a case will be described in which products in columns with even column numbers are carried out.

In the initial state, the group relay, selection relay, common relay, first NG signal, and second NG signal are all OFF. If the first NG signal and the second NG signal detected in this state are both OFF, step 1
If not, it is determined that one of the relays is welded.

The following steps determine which relays are welded or not.

In step 1, the group relay and selection relay remain in their initial states, and the common relay 20 is turned on. The first NG signal and the second NG signal are turned ON. If both the first NG signal and the second NG signal detected in this state are ON, the process proceeds to step 2, and if not, it is determined that the common relay is not ON and the welding state is present.

In step 3, the group relays continue in their initial state and all selection relays are turned on. The common relay continues in the state of step 1.

Both the first NG signal and the second NG signal are turned off. If the first NG signal and the second NG signal detected in this state are both OFF, the process proceeds to step 3, and if not, it is determined that the selection relay is not ON and welding has occurred.

In step 3, the group relay continues in its initial state. The selection relay turns off only the selection relay to which the specified column belongs, and keeps the others in the ON state.

The common relay continues in the step 1 state. 1st NG
The signal and the second NG signal are turned ON. If the first NG signal and the second NG signal detected in this state are both ON, the process proceeds to step 4, and if not, it is determined that the selection relay has not turned OFF and welding has occurred.

In step 4, the group relay turns ON only the group relay of the C group to which the designated column belongs, and the other group relay maintains the OFF state. The selection relay remains in the state of Ste/knob 3. The common relay continues in the state of step 1. The first NG signal is OF if the C group to which the specified column belongs is the first G group.
F, and the second NG signal is turned OFF if the C group to which the designated column belongs is the second G group. If the first NG signal and second NG signal detected in this state meet the above conditions, the process proceeds to step 5, and if not, it is determined that the group relay is turned on and welding has occurred.

In step 5, the group relay that was turned on in step 4 is turned off, and the other group relay is kept in the OFF state. That is, both group relays are turned off. The selection relay is
The state of step 3 continues, and the common relay continues the state of step 1. Both the first NG signal and the second NG signal are turned ON. If the first NG signal and the second NG signal detected in this state are both ON, the process proceeds to step 6, and if not, it is determined that the group relay has not turned OFF and welding has occurred.

In step 6, the common relay 20 is turned off and the process proceeds to step 7.

In step 7, the group relays continue in the state of step 5, all selection relays are turned off, and the common relay continues in the state of step 6. Both the first NG signal and the second NG signal are turned off. If both the first NG signal and the second NG signal detected in this state are OFF, the product in the designated column is carried out, and if not, it is determined that the selection relay is not OFF and has been welded.

With the product dispensing device 1 having the above configuration, drive current can be applied to all product dispensing devices by the selection relay forming the S group, the common relay forming the C group, and the group relay forming the C group. , this allows the number of relays to be reduced,
Moreover, the circuit becomes smaller and costs are reduced. moreover,
It is possible to easily determine in which relay an abnormality has occurred. In addition, relay failure can be checked at the same time as the product is being carried out.

FIG. 4 is a circuit diagram of the relay drive circuit 102 of the second embodiment.

The difference in structure between this relay drive circuit 102 and the relay drive circuit 2 of the first embodiment lies in the method of forming the C group and the common relay.

That is, the first transfer contacts and the second transfer contacts of the first to fourth selection relays 1j to 14 are all connected in parallel to form the first G group. 5th ~
The first transfer contacts and second transfer contacts of the eight selection relays 15 to 18 are all connected in parallel to form a second G group.

The first G group is connected in series to the transfer contacts of the first group relay 30, and the second G group is connected in series to the transfer contacts of the second group relay 32.

Furthermore, the common relay uses four make contact type relays instead of one two-transfer contact type relay. Among these four common relays, the 1st C group is connected to one end of the first common relay 122, the 20th group is connected to one end of the second common relay 124,
A 30th group is connected to one end of the third common relay 126, and a 40th group is connected to one end of the fourth common relay 128. And four common relays 122
The other ends of 128 are connected in parallel and connected to one pole of the power source 33.

The control flow of this relay drive circuit 102 at the time of product delivery is almost the same as that of the relay drive circuit 2, except that the operating state of the common relay is different as described below.

In the control flow shown in Figure 3, whether common relay 20 is ON
When , the first common relay 122 and the third common relay 1
28 is OFF, and the second common relay 122 and the fourth
Common relay 128 is ON. Also, when common relay 2o is OFF, the first common relay 122 and the third
Common relay 126 is ON, and second common relay 122 and fourth common relay 128 are OFF.

FIG. 5 is a circuit diagram of the relay drive circuit 2Q2 of the third embodiment.

In this relay drive circuit 202, the method of forming the S group is the same as in the relay drive circuit 2 of the first embodiment.

The method for forming group C is as follows.

1.5.9.13.17. connected to the first make contact of each of the first to eighth selection relays 11 to 18.
21.25.29 The other ends of the solenoids 10 are connected in parallel to form the first G group. The other end of the 2.6.10.14.18.22.26.30 solenoid 10 connected to the first break contact of the 1st to 8th selection relays 11 to 18 is connected in parallel to the 2nd G group. is forming.

3.7.11.15.19.23.2 connected to the second meter contact of the 1st to 8th selection relays 11 to 1B
7.31 The other end of solenoid 10 or the third
They form the G group. No. 4.6 connected to the second break contacts of No. 1 to 8 selection relays 11 to 18.
．． 12.16.20.24.28.32 Solenoid 10
The other ends are connected in parallel to form a fourth G group.

The method for forming group C is as follows.

The first transfer contacts and second transfer contacts of the first to fourth selection relays 11 to 14 are all connected in parallel to form a 1C group.

The first transfer contacts and second transfer contacts of the fifth to eighth selection relays 15 to 1B are all connected in parallel to form a second C group.

Reference numeral 222 indicates a transfer contact type first group relay (indicated as RG-1 in the figure).

A first G group is connected in series to the transfer contact of the first group relay 222. The make contact is
It is connected to one pole of the power supply 33.

One end of a first photo coupler 240 is connected to the break contact. The other end of the first photocoupler 240 is connected to one end of a first detection resistor 241 having a resistance value R2, and the other end of the first detection resistor 241 is connected to one pole of the power source 33.

Reference numeral 224 indicates a transfer contact type first group relay (indicated as RG-2 in the figure).

A second G group is connected in series to the transfer contact of this second group relay 224. The make contact is connected to one pole of the power source 33.

One end of a second photo coupler 242 is connected to the break contact. The other end of the second photocoupler 242 is connected to one end of a second detection resistor 243 having a resistance value R2, and the other end of the second detection resistor 243 is connected to one pole of the power source 33.

Reference numeral 226 indicates a transfer contact type third group relay (indicated as RG-3 in the figure).

A third G group is connected in series to the transfer contact of the third group relay 226. The make contact is connected to one pole of the power source 33.

One end of a third photo coupler 244 is connected to the break contact. The other end of the third photo coupler 244 is connected to one end of a third detection resistor 245 having a resistance value R2, and the other end of the third detection resistor 245 is connected to one pole of the power source 33.

Reference numeral 228 indicates a transfer contact type fourth group relay (indicated as RG-4 in the figure).

A fourth G group is connected in series to the transfer contact of this fourth group relay 228. The make contact is connected to one pole of the power source 33.

One end of a fourth photo coupler 246 is connected to the break contact. The other end of the fourth photocoupler 246 is connected to one end of a fourth detection resistor 247 having a resistance value R2, and the other end of the fourth detection resistor 247 is connected to one pole of the power source 33.

Reference numeral 230 denotes a make contact type first common relay (indicated as RC-1 in the figure). This common relay 2
A first C group is connected in series to one end of 30.

Reference numeral 232 is a make contact type second common relay (indicated as RC-2 in the figure). This common relay 2
A second C group is connected in series to one end of 32.

Similarly to the relay drive circuit 2, the control flow of the relay drive circuit 202 when unloading the product is similar to that of the relay drive circuit 2. After controlling each relay 0N10FF at each step of the control flow, an NG signal after 100 msec is detected, and the microcomputer 5 Memorized N
If it is equal to 0N10FF of the G signal, proceed to the next step, otherwise, group relay (RG), selection relay (R5), common relay (RC)
Turn off the relay in this order and return the reason why it is not possible to proceed to the next step to the mask controller 3. Furthermore, when the product delivery is completed normally, a notification to that effect is returned to the mask controller 3.

[Effects of the Invention] As described above, in the product dispensing device of the present invention having a failure detection function, the selection relay forming the S group, the group relay forming the C group, and the common forming the C group The relay allows drive current to flow through all product delivery devices. This makes it possible to reduce the number of relays, improve product reliability, and reduce circuit size and cost.

Moreover, a failure detection function can be provided by simply providing a current limiting circuit and a detection circuit in the group relay, and the circuit does not become complicated.

Furthermore, it is possible to easily determine in which relay an abnormality has occurred during the product carrying-out operation in the designated column.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a product dispensing device showing a first embodiment of the present invention, FIG. 2 is a circuit diagram of a relay drive circuit, and FIG. 3 is a control flow of a microcomputer. 4 is a circuit diagram of a relay drive circuit according to a second embodiment of the present invention, and FIG. 5 is a circuit diagram of a relay drive circuit according to a third embodiment of the present invention. [Explanation of symbols... Product dispensing device 2... Relay drive circuit 3... Mask controller 4... Control unit 10... Solenoid 11 ...Second selection relay] 3...
...2nd selection relay] 3...3rd selection relay] 8...8th selection relay 20...Common relay 30...3rd selection relay 1st group relay 32... 2nd group relay 33... Power supply 38... 1st detection resistor 36... 1st photocoupler 38... 2nd detection Resistor 40...Second photocoupler

Claims (1)

[Scope of Claims] 1. In a product dispensing device of a vending machine that selects a column for which dispensing is instructed from among a plurality of columns and supplies a drive current from a power source to a product dispensing device such as a bend solenoid of the selected column. A plurality of product unloading devices are connected in series to each of the first make contact, the first break contact, the second make contact, and the second break contact of the two-transfer contact type selection relay to form a group of four columns. The first make contact, the first break contact, the second make contact, and the second break contact of each S group are connected in parallel to form four C groups, and the first make contact, the first break contact, the second make contact, and the second break contact of each S group are connected in parallel, and the Connect the C group formed by the product unloading device connected to one make contact to the first make contact or first break contact of a two-transfer contact type common relay, and connect the first break contact of each selection relay. C formed by the product delivery device
A C group formed by a product delivery device connected to a first break contact or a first make contact of the common relay and a second make contact of each selection relay and a second make contact of the common relay. or by connecting the second break contact of each selection relay, and connecting the C group formed by the product delivery device connected to the second break contact of each selection relay and the second break contact or second make contact of the common relay; The first transfer contacts of each selection relay are connected in parallel, and the second transfer contacts of each selection relay are connected in parallel to form two G groups, and these two G groups and two transfer contact type group relays are connected in parallel. Transfer contacts are connected in series, and one end of a current limiting circuit is connected in series to the break contacts of two transfer contact type group relays, respectively, and a photocoupler or the like is used to detect the current flowing in the two current limiting circuits. A circuit is provided, the first transfer contact and the second transfer contact of the common relay are connected in parallel and connected in series with one pole of the power source, and the make contact of the two group relays and the current limiting circuit are connected in parallel. The other end is connected in parallel and connected in series with the other one pole of the power supply, the target C group is selected from the four C groups by the common relay, and the target S group is selected from the plurality of S groups by the selection relay. Let me choose, two G
A first control means is provided for outputting a first control signal so as to cause a group relay to select a target G group from the groups and to cause a drive current to flow through the target product carry-out device, and selects a C group to which the target product carry-out device belongs. causing a selection by a common relay, and causing a selection relay to select an S group to which the target product carrying device belongs;
A second circuit is configured to flow a small detection current that does not drive the product delivery device through the current limiting circuit to the target product delivery device.
A vending machine comprising: a second control means for outputting a control signal; and a determination means for determining whether there is an abnormality in each relay based on the first control signal, the second control signal, and the detection state of the detection circuit. Product dispensing device with failure detection function. 2. In a product dispensing device of a vending machine that selects a column for which dispensing is instructed from among a plurality of columns and supplies drive current from a power supply to a product dispensing device such as a bend solenoid of the selected column, a two-transfer contact type product dispensing device is used. A product carrying out device is connected in series to each of the first make contact, the first break contact, the second make contact and the second break contact of the selection relay to form a plurality of S groups in which four columns are one group, The first make contact, first break contact, second make contact, and second break contact of each S group are connected in parallel to form four C groups, and the four C groups and four transfer contact type By connecting the break contacts of the common relay in series, dividing each S group into multiple groups, and connecting all the first transfer contacts and second transfer contacts in each divided group in parallel, multiple These G groups and the transfer contacts of the same number of transfer contact type group relays as the G groups are connected in series, respectively, and a current limiting circuit is connected to the break contacts of the multiple transfer contact type group relays. One end of each is connected in series, a detection circuit such as a photocoupler is provided to detect the current flowing through the current limiting circuit, and the transfer contacts of the four common relays are connected in parallel, and one pole of the power source and connect them in series, connect the make contacts of the plurality of group relays and the other ends of the current limiting circuit in parallel, connect them in series with the other one pole of the power supply, and connect the target C group from the four C groups to a common. A selection relay selects a target S group from multiple S groups, and a selection relay selects a target S group from multiple S groups.
A first control means is provided for outputting a first control signal so as to cause a group relay to select a target G group from the groups and to cause a drive current to flow through the target product carry-out device, and selects a C group to which the target product carry-out device belongs. causing a selection by a common relay, and causing a selection relay to select an S group to which the target product carrying device belongs;
A second circuit is configured to flow a small detection current that does not drive the product delivery device through the current limiting circuit to the target product delivery device.
A vending machine comprising: a second control means for outputting a control signal; and a determination means for determining whether there is an abnormality in each relay based on the first control signal, the second control signal, and the detection state of the detection circuit. Product dispensing device with failure detection function. 3. In a product dispensing device of a vending machine that selects a column for which dispensing is instructed from among a plurality of columns and supplies drive current from a power supply to a product dispensing device such as a bend solenoid of the column, a two-transfer contact type A product carrying out device is connected in series to each of the first make contact, the first break contact, the second make contact and the second break contact of the selection relay to form a plurality of S groups in which four columns are one group, The first make contact, first break contact, second make contact, and second break contact of each S group are connected in parallel to form four G groups, and the four G groups and four transfer contact type The transfer contacts of the group relays are each connected in series, one end of a current limiting circuit is connected in series with each of the make contacts of the four transfer contact type group relays, and a photocoupler or the like is used to detect the current flowing in the current limiting circuit. A detection circuit is provided respectively, each S group is divided into a plurality of groups, and a plurality of C groups are formed by connecting all the first transfer contacts and second transfer contacts in each divided group in parallel, The plurality of C groups and one ends of the same number of make contact type common relays as the C groups are each connected in series, and the break contacts of the four group relays and the other ends of the current limiting circuit are connected in parallel to connect the power supply. Connect in series with one pole of the plurality of common relays, connect the other ends of the plurality of common relays in parallel and connect in series with the other one pole of the power supply, and connect the target C group from the plurality of C groups to the common relay. The target S group is selected from multiple S groups by the selection relay, and the target G group is selected from the four G groups.
A first control means is provided for outputting a first control signal so as to cause a group to be selected by a group relay and to cause a drive current to flow through a target product carrying out device, and a C group to which the target product carrying out device belongs is selected by a common relay. , causing a selection relay to select an S group to which the target product delivery device belongs;
A second circuit is configured to send a small detection current to the target product discharging device through the current limiting circuit to the extent that the product discharging device is not driven.
A vending machine characterized in that a second control means for outputting a control signal is provided, and a determination means is provided for determining whether there is an abnormality in each relay based on the first control signal, the second control signal, and the detection state of the detection circuit. Product dispensing device with failure detection function.