JPS5858718B2 - Vending machine control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the control of product sales in a vending machine, in which a plurality of columns are provided for each type of food, and each column is equipped with a drive device using a motor. This was done in order to avoid suspending sales in general, only suspending sales of the column due to the accident, and continuing sales of other items.

In the case of a vending machine that sells a wide variety of products and has multiple columns, when a light coin is inserted, the machine uses a coin knock to sort the coins, calculates the value, and issues a sales command if there is no abnormality. After the purchaser presses a button in the desired sales column, the desired product is delivered to the sales outlet.

FIG. 1 shows a control circuit diagram of a conventional example, in which a sales command is applied from the terminal 3 of the coin mech to enable sales.

When it becomes possible to sell, press selection switch P1,
When the a contact pH of I is closed, the sales relay (auxiliary relay) Xl is connected to the power source via the b contact XA2 of the sub-relay (auxiliary relay) XA, which will be described later.

When sales relay X1 is energized, its own a contact X
, 1. X1□ and X13 are closed, and X11 drives the product delivery motor M1.

At the same time, the sub-relay xA is excited by X1□ and self-holds with its own a contact XAI.

At this time, the aforementioned contact XA2 opens and the selection switch P1. P2
...Pn (not shown) are all unsaleable.

Sales relay X1 is self-held by contacts X12 and X13.

After the sale ends, the self-holding release switch (reset switch) SWl is operated and its b contact opens and sub-relay xA
is demagnetized and its a contact XAt opens, so the sales relay X,
Also demagnetizes.

One vending cycle is completed by returning the self-hold release switch SW1 and returning the vending machine to the standby state.

By the way, in such a control circuit, circuit breaker CB1. CB2
~CBn (not shown) is provided.

Assume that one of the circuit breakers CB operates due to a motor accident and cuts off the circuit of the motor M1.

However, since sales relay X1 and sub-relay XA remain undemagnetized, all columns end up being unsaleable.

A series of operating processes of these relays is shown in the time chart of FIG.

In this case, since the faulty circuit has been isolated by the motor protection device, there is no need to stop other sales circuits (in fact, there is no harm in continuing sales).

The present invention was made from this point of view, and the circuit is configured so that only the failed column is discontinued and the remaining columns are made available for sale.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 3 shows an embodiment of a control circuit according to the present invention.

In the figure, terminals 1 and 2 are power supply terminals.

Terminal 3 is a signal output terminal that sorts coins inserted into the terminal on the coin mech side, counts them, and issues a sales command.

Between the terminals 3 and 2 are sales relays X1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 and 4, which operate in response to the above-mentioned signals for driving motors M12M2 and the like for discharging goods, which are provided for each column (to be described later). X2 etc. and circuit breaker CB1 for motor protection. CB2 and selection switch P1. The a contacts such as P2 are connected in series and connected in parallel through each contact of the selection switch, and the b of subrelay xA common to all columns described below
Connected in series via contacts.

Among the product transport motors for each column, motor M1 is connected to power supplies 1 and 2 through the a contact of reset switch SW1, and motor M2 is connected to the b contact of reset switch SW1 in the previous stage and its own column. Reset switch S
They are connected in parallel through the a contact point of W2.

On the other hand, each motor M12M2 has a signal circuit circuit breaker CB1. Sales relay X after passing through CB2
1's A contact X12 and sales relay X2's A contact X22
The power source 2 is connected through the power source 2.

Sales relay X1 has its own a contacts X11 and X13
Selling relay X1. It is connected in series between the power supplies 1 and 2 via the a contact XB1 of the auxiliary relay xB and the b contact XOt of Xo, and the a contact XAI of XA, for demagnetizing the auxiliary relay x2, etc. and the sub-relay xA.

In addition, the next stage sales relay, for example, the b contact of X2, X21 and X2
3 are inserted into the series circuit in stages corresponding to the number of columns, and each stage is interlocked.

(Then, the auxiliary relay Through the series circuit of the b contact of and the series circuit of the b contact of each sales relay, such as
And it is connected between the power supplies 1 and 20 through the a contact of xB.

The operation of each relay in the above circuit configuration will be explained with reference to the time chart of FIG.

A sales command is issued from terminal 3 of the coin mech, and for example, if you press the selection switch P1, the product sales command
1 is energized and the a contact X11 is closed, and the sub relay xA is energized by power supply from the terminal 3 via the contact X11 and the a contact XB of the auxiliary relay xB, which has been energized and closed from the beginning.
The auxiliary relay Xo, which was energized at this time, is demagnetized because X13 is opened, and is self-held via its b contact Xc1 and its own a contact XAt.

Sales relay X1 also has its own a contact X1. Self-maintained with X13.

On the other hand, the product carry-out motor M1 is driven via the a contact X12 of Xl to carry out the product.

At this time, since the b contact XA2 of the sub-relay XA is separated, the other selection switches P2 and subsequent ones and the sales relays X2 and subsequent ones are disconnected from the circuit.

After the product is sold, reset switch SW1 is operated, auxiliary relay xB is demagnetized, and its a contact XBt is opened, so sales relay X1 and sub-relay xA are demagnetized, and reset switch S is activated.
By returning W1, the system returns to the standby state and completes one sales cycle.

Now, for some reason, motor M1 broke down while the product was being transported.
Assume that circuit breaker CB1 operates and cuts off the circuit.

The sales relay X1 inserted in series with the circuit breaker CB1 is demagnetized, and of course the motor M1 is connected to the a contact X.
1□ opens and stops.

Since b contact X13 of sales relay X1 closes, auxiliary relay Xo is energized, and b contact Xc1 inserted in series with sub relay xA opens, so sub relay xA's self-holding circuit is cut off and demagnetized, causing a motor accident. Return columns other than locked columns to the standby state where they can be sold.

That is, for example, by pressing the selection switch P2, the sales relay X2 is energized, the product delivery motor M2 is driven, and the product is sold.

As mentioned above, in the case of the conventional type, sales of all columns were stopped due to an accident in one place, resulting in a significant loss of merit as a vending machine.

However, according to the present invention, only the accident column is locked,
Other columns will be able to continue selling,
The problem of single-person defects in vending machines when selling a wide variety of products has been resolved.

[Brief explanation of drawings]

Fig. 1 is a control circuit diagram of a conventional vending machine, Fig. 2 is an operation process diagram of each relay in Fig. 1, Fig. 3 is a control circuit of a vending machine according to an embodiment of the present invention, and Fig. The figure is the third
Identical parts in the operation process diagrams of each relay in the figure and FIGS. 1 to 4 are indicated by the same reference numerals. 1.2: Power terminal, 3: Coin knock side signal terminal,
Xl, X2: Sales relay, XA: Sabrire, xBl, X
o: Auxiliary relay, M12M2: Product delivery motor, SW
l, SW2: Reset switch, Pl, P2: Selection switch.

Claims (1)

[Claims] 1 provided in each column and excited by a sales signal via a circuit breaker for motor protection, a selection switch, and a B contact of a common first auxiliary relay, and at least its own first A contact and the circuit breaker and a plurality of sales relays that are energized by a power source through their own third a-contacts to form a self-holding circuit;
A plurality of motors are supplied with power from the power supply through the first A contact of each sales relay and a circuit breaker, respectively, and carry out the products for each column. a second auxiliary relay that is commonly inserted and connected to the self-holding circuit of each of the sales relays; and a third auxiliary relay that is connected to the power source through at least a series circuit of the B contacts of each of the sales relays; and the first auxiliary relay has a first a contact point of each of the sales relays in a parallel relationship and a contact a of the second auxiliary relay that is common to these relays.
energized by the sales signal via a contact, and forming a self-holding circuit via its own a contact, the a contact of the second auxiliary relay, and the b contact of the third auxiliary relay;
A control circuit for a vending machine, characterized in that when any of the circuit breakers is cut off, the self-holding of the first auxiliary relay is released by the third auxiliary relay.