JPS592197A - Control circuit for vending machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control circuit for a vending machine, and more particularly to an improved control circuit of this type that does not require the use of a relay for controlling product delivery time.

Conventionally, in a control circuit of a vending machine, in addition to a selection relay corresponding to a product selection button, several relays are provided, such as a pen relay that stores the sales status and a reset relay that regulates the product delivery time.

However, the cost of relays is high, so the more relays there are, the higher the cost will be. Therefore, reducing the number of relays has been the biggest challenge for cost reduction.

Figure 1 shows the control circuit of a conventional vending machine.
In the same figure, l is the coin mechanism.

It is connected to the power supply line tl+t2 and outputs a coin signal to terminals +81 to 83 when the input amount reaches a predetermined amount, respectively. Note that R is a reset input terminal of the coin mechanism. BAr BF is activated by operating the product selection button, and the power line 1. ．． 1
It is connected between the two. a1 to a3 are of relay A, b,
-b3 is relay B's (!1"" (!3 is relay C's l
d, -d3 are of relay D, e1 to e3 are of relay E,
f1 to f3 are operating contacts of relay F, with the - side representing a play contact and the 0 side representing a make contact. (2) is a pend relay that stores the sales status, and is connected between the power supply t2 and each coin signal terminal via a diode. VI, V
2 is the operating contact of the relay ■, the hook is the break contact, and the 0 side is the make contact. RE is a reset relay that regulates product removal time, is a delayed recovery type, and is connected to power line 1. ．．
A diode is connected between the protective resistor 2 and the break contact of the selection relay. Re is the operating contact of the relay 1, the - side is a break contact, and the 0 side is a make contact. SLA-SLF is a product delivery solenoid for transporting products corresponding to each selection relay A to F.

PA-PF is a pilot lamp for displaying sales availability corresponding to each selection button switch, and NA-NF is a sold-out switch that is turned off when the product corresponding to each selection button switch is sold out.

This conventional circuit is in a standby state for sale as shown in Figure 5.

(Reset) IJ Ray RE is in operation. In this condition.

When a coin is inserted and a coin signal is output from the coin mechanism 1 to the 811821113 terminal, the signal passes through each selection relay A-F to the pilot lamp PA.
-Products available for sale are displayed as the flow goes to PF. Here, when one product selection button is pressed and that switch, for example BA, is turned on, the parallel lamp PA is short-circuited.

Sufficient current flows through selection relay A and the selection relay operates. As a result, selection relay A has its make contact al+a3
Since it is connected between the power lines tI and t2 via the make contact of the reset relay 1, it is self-maintained. At this time, one terminal of the bend relay ■ is connected to the power line L1 from the coin signal terminal via the make contact a3+re.

It operates by half-wave rectification between power lines 11,12.

As a result, the product unloading solenoid SLA is connected to the make contact a2.
Since it is connected between the power lines tl and t2 via the power lines tl and t2, it operates and carries out the corresponding product. - Since the power line t1 is connected to the reset terminal R of the coin mechanism 1 through the other make contact v1 of the gap relay ①, the coin mechanism 1 stops its coin signal.

Make change and perform other actions.

The power supply to the reset relay RE is cut off by its break contact a1 when the selection relay A is activated, but since it is of a delayed recovery type, it is restored after a set time. Until the reset relay RE is restored.

The above-mentioned product carry-out solenoid is operated to carry out the product carry-out. When reset relay RE is restored.

Since the contact re breaks, the power supply to the 1 selection relay A is cut off. As a result, the 1 selection relay A is released from self-holding and is restored. Therefore, the power supply to the pend relay ■ and product unloading solenoid SLA is also cut off.
Torera will also be restored. Also.

With the restoration of selected relay A, power is supplied to relay RE again, so relay RE enters the operating state.

Return to sales standby state.

The above operation can be performed even if you press another selection button, the only difference is that the selection relay and product delivery solenoid that operate are different.
It's exactly the same.

As is clear from the above description of the operation, in the conventional circuit, a delayed recovery type reset relay RE is used in order to end the product sales operation, that is, to regulate the time for taking out the product.

In order to cope with the demand for reducing the number of relays used as described above, the present invention provides a control circuit for a vending machine that can regulate product delivery time and perform a sales end operation without using a reset relay. The purpose is to provide

The present invention aims to eliminate the use of a reset relay by providing a one-selection relay with the function of regulating the removal time.
A charging circuit is constructed by connecting a capacitor to a power source through a resistor and a break contact of a selection relay, and a discharging circuit is constructed by connecting both ends of this capacitor to a selection relay through a resistor and a make contact of a selection relay. This is a control circuit for a vending machine that uses this discharge circuit to self-hold the selection relay and to regulate the product delivery time.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.

In FIG. 2, the same parts as in FIG. 1 are indicated using the same reference numerals, and detailed explanation will be omitted.

In the illustrated circuit, in accordance with the present invention, the circuit of the reset relay RE of FIG. 1 is omitted. Reset relay R with
In order to perform the same function as t1.E, capacitor Ci is connected to power supply line t1.
It is connected between t2.

Therefore, capacitor C1 is charged during non-operation of selection relays A-F. Still, this capacitor C1 and resistor R1 are connected to the respective make contacts a1 at both ends of selection relays A-F.
+a3;bl rb3;C1+C3;dl+d3
; el.C3: connected via fl.f3, forming a discharge circuit for the capacitor C1.

In addition, as shown in Figure 9, while the front selection relay is operating, the break contact of the front relay is inserted into the discharge circuit through the rear selection relay so that a discharge circuit is not configured through the rear selection relay. has been done.

Next, the operation of this circuit will be explained.

In the illustrated sales standby state, 56 selection relays A-F.

Pendrelay■ is in a recovery state. Capacitor C1 connects resistor R1 + break contact al”f to power supply lines tl, tz
l+connected via diode D.

It is charged.

A coin is inserted in the sales standby state, and the coin signal terminal s
When a coin signal is output from l to S3, pilot lamps PA to PF are lit in the same manner as in FIG. At this time, the product selection button is pressed.

When the switch, for example IBA, is turned on, selection relay A operates as in the case of FIG. the result.

The capacitor itself and the resistor R1 are connected to both ends of the selection relay A through the make contact al+a3, and the capacitor c1
Since the discharge current flows through the selection relay A, the 2 selection relay A is self-maintained.

As a result of the operation of selection relay A, current is supplied to pend relay ■ through its make contact a3, as in the case of FIG. 1, and pend relay V operates, while make contact a2r
The product unloading solenoid SLA is operated via V2 to unload the product.

Therefore, at the same time as the self-holding is released, the power supply to the pendrelay (2) and the carry-out reinoid is cut off, and the product returns to the sales standby state.

Even if you press another selection button, the only difference is that the selection relay and ejection solenoid that operate are different, but everything else is the same.

As is clear from the above description, according to the present invention, the self-holding of the first selection relay and the regulation of the unloading time can be achieved by the selection relay by configuring the charging/discharging circuit with the capacitor and the selection relay without using a reset relay. Can be used for both purposes. Therefore, it has the advantage that the number of relays used can be reduced with a simple circuit.

[Brief explanation of drawings]

Figure 1 is a diagram showing the control circuit of a conventional vending machine;
The figure is a circuit diagram showing one embodiment of the present invention. ■...Coin mechanism, A-F...Selection relay. PA~PF...Selection button switch, SLA-S
LF...Export solenoid, ■...Pend relay, R
E...Reset relay.

Claims (1)

[Claims] 1. In a control circuit for a vending machine that has a selection relay activated by the ON operation of a selection switch, a charging circuit is configured by connecting a capacitor to a power source via a resistor and a break contact of the selection relay, and the capacitor is connected to both ends of the capacitor. is connected to the selection relay via a resistor and the make contact of the selection relay to form a discharge circuit, and the discharge circuit self-holds the selection relay and controls the product delivery time. Machine control circuit.