JPS625751Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a control circuit for a vending machine, and in particular to a connection circuit for a vending machine.

[Conventional technology]

In a vending machine, when a product on the in-flight shelf is sold out, it immediately lights up a sold-out indicator lamp in each column to indicate to the customer that the product is sold out, and also turns on the bend relay for the corresponding column in the control circuit. The process is to disconnect the circuit and stop selling the column. As a means for this purpose, a sell-out switch, which is installed in each column of the product shelf and is activated when detecting the sold-out of the product, is inserted into the bend relay circuit and the sell-out lamp circuit.

As for conventional control circuits, for example,
It is known from Japanese Patent Application No. 51-46196 and Japanese Patent Application Laid-open No. 53-78896, and in particular, a bend relay circuit configured between a bend signal line drawn out from a coin mechanism and one of the power lines is used when a coin is inserted. In order to disable all remaining bend relay circuits when the product selection pushbutton switch of the next column is pressed, a special interlock contact mechanism is provided so that the product selection pushbutton switch has an interlock function between the columns. A product selection push button switch provided in the column is inserted between the bend relay circuits of each column, and the above-mentioned sell-out switch is inserted between the product selection push button switch and the bend relay in the bend relay circuit. ing. On the other hand, the sold-out lamp is connected between the power supply lines via the sold-out switch, regardless of the product selection push button switch.

[Problem that the invention attempts to solve]

By the way, the product shelves in the vending machine with the above-mentioned circuit configuration, the relay box housing the bend relay of the control circuit, the product selection push button switch on the door, and the sold-out lamp are located at predetermined positions spaced apart from each other. It is installed,
In reality, the current situation is that internal wiring is performed by passing lead wires between each of these products. For this reason, especially for large machines with a large number of columns, internal wiring requires a lot of effort and a lot of wire, storage space is limited, and if there is a break in the wires, there are a lot of wires to repair. There were problems such as the work taking a long time.

In view of the above points, it is an object of the present invention to provide a control circuit for a vending machine that reduces the number of lead wires for internal wiring as much as possible and has good workability and layout efficiency.

[Means for solving problems]

The present invention consists of a bend relay connected between a bend signal line drawn out from a coin mechanism and one of the power lines (power supply No. 2), a bend relay circuit having a product selection push button switch, and the other power line (No. 1 power supply). A sold-out lamp circuit consisting of a sold-out indicator lamp connected between one power supply (No. 2 power supply) and one (power supply No. 2) is equipped with a sold-out switch that is placed on each product shelf and detects the sold-out state of the product. In the control circuit of a vending machine that turns off the bend relay circuit and lights up the sold-out lamp by the operation of a switch,
A switch having two sets of circuit contacts, an A contact and a B contact, is used as a sell-out switch, and a single lead wire is shared between one of the power lines (power supply No. 2) and the sell-out switch. The B contact of the sell-out switch is inserted and connected to the bend relay circuit, and the A contact is inserted and connected to the sell-out lamp circuit.

[Effect]

In this invention, the a and b contacts of the sold-out switch are inserted and connected to the bend relay circuit and the sold-out lamp circuit closest to the 2nd power supply, and the a and b contacts of each switch are connected to the 2nd power supply. A single lead wire can be used for both lines.

〔Example〕

The present invention will be described in detail below based on illustrated embodiments.

In Figure 1, 1 and 2 are the first and second power supplies of the power lines, respectively, and the coin mechanism C/M connected between power lines 1 and 2, which sorts and counts coins, It has a bend signal output terminal (a) and a reset input terminal (b) for outputting a bend signal when coins reach a predetermined amount. 3 is a bend signal line drawn out from the coin mechanism C/M, and between bend signal line 3 and No. 2 power supply line 2, bend relay circuits 4, 5, ... corresponding to each column of the in-flight product shelf are connected. The bend relay circuits 4 and 5 have bend relays X ₁ and X ₂ and product selection pushbutton switches PB ₁ and PB ₂ , respectively. X ₁₁ , X ₁₂ , X ₁₃ and X ₂₁ , X ₂₂ , X ₂₃ are the contacts of bend relays _{X 1 and} operation solenoid
It is used to open and close S ₁ and S ₂ . Also
XA, XB are time-limited auxiliary relays, XA ₁ ,
XA ₂ , XA ₃ and XB ₁ , XB ₂ are auxiliary relays XA,
This is the contact point of XB. Furthermore, a lamp circuit 6 is constructed between the power supply lines 1 and 2, in which sold-out lamps L ₁ and L ₂ corresponding to each column are connected. Then, over the bend relay circuits 4 and 5 and the sold-out lamp circuit 6, sold-out switches US ₁ and US ₂ installed in each column of the product shelf are inserted and connected near the No. 2 power line, respectively. There is. The sell-out switch US ₁ ,
US ₂ uses a switch that has two sets of circuit contacts, an a contact and a b contact, of which the b contact is used as a product selection push button switch in bend relay circuits 4 and 5.
The a-contact is connected closer to the second power supply than PB ₁ and PB ₂ , and in series with the sold-out lamps L ₁ and L ₂ , respectively. In this case, in particular, connect the No. 2 power supply line 2 and each sell-out switch US ₁ , US ₂ with one lead wire l shown in bold line, and use this one lead wire l in common to The contact and b contact are inserted and connected to the sold-out lamp circuit 6 and bend relay circuits 4 and 5, respectively.

However, with this invention, the sell-out switch US ₁ ,
In US ₂ , the switch contact is inserted and connected to the bend relay circuits 4, 5 and the sold-out lamp circuit 6 closest to the 2nd power line, so the a contact and b contact of each switch are connected to the 2nd power line. It becomes possible to wire between 2 and 2 by sharing one lead wire l.

In the control circuit shown in FIG. 1 above, bend relays X ₁ and X ₂ are supplied with power from power lines 1 and 2 through diodes that prevent the bend signal lines 3 of the coin mechanism C/M from being connected to each other. A half cycle of alternating current flows, but the bend relay
Since both X ₁ and X ₂ are AC (alternating current) relays, the remaining half cycle is passed through other diodes. Also, the interlock between each column is the contact point _X12 of bend relay _X1 , _X2 ,
X ₂₂ and the timing of energizing the solenoids S ₁ and S ₂ is slightly delayed from the reset signal to the coin mechanism C/M to establish the product selection operation.
PB ₁ and PB ₂ can be simple automatic return type push-button switches that do not have interlock contacts connecting them.

To explain the sales operation in this configuration with reference to the time chart in Fig. 2, first, when a coin is inserted and a bend signal is output from the coin mechanism C/M to the bend signal line 3, the product selection switch PB ₁ is turned on. When turned on, the sell-out switch US ₁
The bend relay X ₁ is energized through the b contact, the contacts X ₁₁ , X ₁₂ , and X ₁₃ are switched, and the bend relay X ₁ is self-holding. When contact X ₁₂ toggles, auxiliary relay XA is energized to close that contact.
XA ₁ , XA ₂ , XA ₃ switch, auxiliary relay XA
It takes self-preservation. By switching contact XA ₂ , power supply to auxiliary relay XB is stopped, and contacts XB ₁ and XB ₂ are switched after a certain time delay. Thereafter, when contact XB ₁ is turned on and contact XB ₂ is turned off, solenoid S ₁ is energized by turning on contact XB ₁ , and power supply to auxiliary relay XA is stopped by turning off contact XB ₂ . After a certain time delay, when contacts XA ₁ , XA ₂ , XA ₃ of auxiliary relay XA return to their initial states, solenoid S ₁ and bend relay X ₁
is de-energized, then auxiliary relay XB is re-energized and the vending machine is ready for the next sale.

When sales are carried out one after another and the products stored on the product shelf are sold out, the sell-out switch of the sold-out column, for example US ₁ , is activated, turning on the a contact and turning on the sold-out lamp L ₁ of the corresponding column. is turned on, and the b contact is turned off to turn off the bend relay circuit 4 of the corresponding column.

The layout of this in-machine wiring is schematically shown in FIG. 3. 7 represents a relay box containing various relays, and 8 represents a product shelf. As is clear from Figure 3, one lead wire l
No. 2 power supply and No. 2 power supply for two sets of circuit contacts are shared.
A sell-off switch US ₁ located far from the main power source,
Wire between US ₂ .

[Effect of idea]

According to the present invention, the second bend relay circuit and the sell-out lamp circuit of the sell-out switch
The wiring network is simplified by configuring the control circuit so that it is inserted closer to the No. 2 power supply line and shares one lead wire between the A and B contacts of the above switch and the No. 2 power supply line. Therefore, the number of lead wires, the number of man-hours for wiring work, the amount of lead wires used, etc. can be reduced, the storage space can be reduced, and the work can be simplified.

[Brief description of the drawings]

Fig. 1 is a control circuit diagram of a vending machine showing an embodiment of the present invention, Fig. 2 is a time chart diagram for explaining the vending control operation of Fig. 1, and Fig. 3 is an in-machine wiring diagram based on Fig. 1. FIG. 1... No. 1 power line, 2... No. 2 power line, 3... Bend signal line, 4, 5... Bend relay circuit, 6... Sold out lamp circuit, C/M...
Coin mechanism, X ₁ , X ₂ ...Bend relay, XA,
XB...Auxiliary relay, PB ₁ , PB ₂ ...Product selection push button switch, L ₁ , L ₂ ...Sold out lamp, US ₁ , US ₂ ...
...Sold out switch, l...Common lead wire, X ₁₁ ,
X ₁₂ , X ₁₃ , X ₂₁ , X ₂₂ , X ₂₃ ...Bend relay X ₁ ,
x ₂ contacts.

Claims (1)

[Scope of utility model registration request] A bend relay is connected between the bend signal line drawn out from the coin mechanism and one of the power lines (no. 2 power supply), a bend relay circuit having a product selection push button switch, and the other of the power lines (no. 1
A sold-out lamp circuit consisting of a sold-out indicator lamp connected between one power supply (No. 2 power supply) and one (power supply No. 2) is equipped with a sold-out switch that is placed on each product shelf and detects the sold-out state of the product. In a control circuit for a vending machine that turns off a bend relay circuit and lights up a sell-out lamp by the operation of a switch, a switch having two sets of circuit contacts, an a contact and a b contact, is used as the sell-out switch, and the power supply line Connect the B contact of the Sold Out switch to the bend relay circuit, and the A contact to the Sold out lamp circuit by sharing one lead wire between one side of the (No. 2 power supply) and the Sold out switch. A control circuit for a vending machine characterized by: