JPS5933099Y2 - Vending machine control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control circuit for a vending machine, particularly for a vending machine with a multi-price coin mechanism.

Recently, with the development of a coin mechanism for multiple prices, among the multiple sales permission signal output terminals of the coin mechanism, only the terminal corresponding to the product column selected by the purchase operation is used to output the sales permission signal based on the purchase operation. Vending machines are widely used that enable the sale of multiple types of products with different prices by giving a signal in phase with the sales permission signal after the vending permission signal has disappeared.

In addition to the means for discharging the products, the control circuit also includes a selection relay corresponding to each product column of the vending machine on a one-to-one basis, and sends the above-mentioned sales signal to the sales permission signal output terminal. It has been proposed to insert and connect the contacts of the selection relay in series to the input circuit.

However, parts that can be used as such selection relays are currently quite expensive, which is a major obstacle in providing vending machines at low cost.

In particular, vending machines that use a multi-price coin mechanism can sell many types of products with one machine, so individual packaging for machines with many product columns is increasing. In this case, the number of selection relays will inevitably increase, which will become a major factor in the rise in price.

Also, electromagnetic solenoids (hereinafter referred to as pend solenoids) are often used to drive the mechanism for ejecting products, but in order to drive them with AC power, they must be equipped with a shade removal coil. If it does not perform the required operation, this also causes the price to go up.

Therefore, the purpose of the present invention is to omit the selection relay and the shaded coil of the pend solenoid in the control circuit of a vending machine equipped with a multi-price coin mechanism, thereby realizing cost reduction. be.

A further object of the present invention is to provide a control circuit that achieves the above objects and reliably prevents malfunctions due to simultaneous operation of the product selection button and refund lever.

The present invention is a multiplex terminal that includes a plurality of price terminals and a reset terminal, and has a function of performing a refund operation if the reset terminal reset signal is not inputted before a certain period of time has passed after receiving a refund signal by operating a refund lever. In a vending machine equipped with a price coin mechanism, a plurality of electromagnetic solenoids that drive a mechanism for discharging products, and a product selection button switch, the vending machine corresponds one-to-one to the operation of each of the plurality of electromagnetic solenoids. A plurality of first switches are provided, each of which is connected in series to each of the plurality of electromagnetic solenoids, and each series circuit of the electromagnetic solenoid and each of the electromagnetic solenoids is connected to a common second switch and each of the electromagnetic solenoids. is connected to a power source via the first switch corresponding to the electromagnetic solenoid, and the price terminal of the coin mechanism is connected to a common connection point between the electromagnetic solenoid and the cyrisk, and the common connection point is connected to the power supply via a diode. and when the selection button is pressed while the price signal is being output from the price terminal. a first delayed return type relay that operates in response to the price signal and closes the third switch; and when any one of the plurality of first switches closes, the relay operates with a delay to a second relay that closes the switch and connects a power source as a reset terminal heliset signal of the coin mechanism, and a circuit that ignites the cyrisk when the second switch is closed. This is a control circuit characterized by the following.

The present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a coin mechanism CM with 3 prices and 3 columns and a mechanism for discharging products is driven by Benton Lenoid SLa, S.
The case is shown in which it is applied to a vending machine using Lb and SLc.

In Figure 1, coin mechanism CM is AC power supply PS
, three sales permission signal output terminals (hereinafter referred to as price terminals) 3, 4 and 7, and a reset terminal 6.

Price terminals 3, 4, and 7 are used to determine whether or not to output a vending permission signal according to the amount of money inserted into the vending machine.
For example, if the amount is low, output only from terminal 7,
In the case of an intermediate amount, it is set to be output from terminal 3 in addition to terminal 7, and in the case of a high amount, it is set to be output from terminal 4 in addition to terminals 7 and 3.

In addition, this coin mechanism CM requires that a signal in phase with the sales permission signal is input to either price terminal 3.4 or 7 immediately after the sales permission signal is cut off (hereinafter, this will be referred to as "
The system uses a method called "reverse charging" to determine which price of the product was selected, calculates the difference between that price and the amount invested at that time, and pays change.

Furthermore, when a reset signal of a certain level or more is input to the reset terminal 6 with a predetermined polarity (the illustrated circuit is a case of negative polarity) with respect to the power supply terminal 2, the output from the price terminals 3, 4, and 7 is stopped. ing.

In addition, like the normal coin mechanism CM, when a refund signal is given by operating the cancellation switch C8W by operating the refund lever, the coin mechanism CM will be used for a certain period of time (maximum 30m5).
Afterwards, the sales permission signal is cut off, and if a reset signal is not input within a longer fixed period of time (usually 200m5), a refund will be given.

Although the explanation here will be omitted, it goes without saying that it also has other general functions that the price coin mechanism has.

Terminals 1 and 2 of such a coin mechanism CM are connected to a power source PS, and a diode D11. D.”2. Connect pend relay ■ through Di3 and resistor R1, and when a sales permission signal is output to either price terminal 3 or 4.7, resistor R1
and the time constant delay determined by capacitor C1 (
At approximately 500 m5), the bend relay (■) is activated and its normally open contact (■) is closed.

This bend relay (2) is also demagnetized with a time delay according to the resistor R1 and capacitor C1 when the output of the sales permission signal from the price terminals 3, 4.7 disappears, and its contact (2) is opened.

On the other hand, the pend solenoids SLa to SLc, which are provided in one-to-one correspondence with product columns, include Cyrisk 5CRa-8C.
Rc are connected in series, and the series circuits are connected in parallel to the power supply PS, and a common contact r is connected to the power supply PS.

(described later) and each self-holding switch SW
a = SW c and the common contact V.

In addition, pendo solenoids SLa to SLc and Cyrisk 5
The price terminals 3°4.7 of the coin mechanism CM are connected between CRa~5CRC in a one-to-one correspondence, and gate signal dividing resistors Ra-Rc and diodes Dg are connected.
It is equipped with a cyrisk ignition circuit having a to Dgc.

Furthermore, pendo solenoids SLa to SLc and Cyrisk 5
Between the common connection point of CRa to 5CRc and the power supply PS,
Common operating contact r with diodes DS and ~DS3, respectively
a□ (described later) is provided.

That is, contact ra2 and one diode (DS) each.

The series circuit of DS2 or DS3) consists of a contact re and one sirisk (SCRa, 5CRb or 5CRc).
) in parallel with the series circuit.

The self-holding switches SWa to SWc are for self-holding the pend solenoid SLa-8Lc, and are driven by the pend solenoid SLa =SLc
Configure it so that it is done by

The normally closed contacts of this self-holding switch S W a = S W c are connected in series, and a lamp L for displaying the standby state for product selection is further connected to this.

Rather than connecting this lamp L in series with the circuit, it is better to connect it in parallel with a resistor as shown in Figure 2, or to use a transformer as shown in Figure 3, to ensure safety in the event of a lamp burnout. It is also preferable because it enhances the quality.

Moreover, a self-holding switch S W a = S W
Connect a reset relay RE in parallel to c.

This reset relay RE has the above-mentioned normally open contact re inserted between the reset terminal 6 of the coin mechanism CM, the above-mentioned thyristors 5CRa to 5CRc connected thereto, and the power supply PS, and its operation is It has a time delay according to resistor R2 and capacitor C2.

In Fig. 1, the selection switches PBa to PBc and the self-holding switches SWa to SWc are normally connected to the black circle contact side, but when a driving force is applied, they are switched to the white circle contact side. do.

In addition, P B a "P B c is a selection switch with a configuration similar to that used in conventional vending machines,
The normally closed contacts are connected in series, and one end is connected to the contact ra+.
1 to the power supply PS via the relay RA diode D s 4 .

The normally open contacts of the selection switches PBa to PBC are connected to corresponding pen solenoids SLa to SLc, respectively.

Relay RA has the above-mentioned contacts ral and ra2, and performs instantaneous operation delay recovery through the action of resistor R3 and capacitor C3.

The operation close terminal side of the operation contact ral is a self-holding switch S.
It is connected to a series circuit of W a = S W c.

Now, Figure 1 shows a state in which no fees have been added to the sales price of the product.

Next, for example, when a large amount of money is inserted and a sales permission signal is output from all price terminals 3, 4, and 7 of the coin mechanism CM, the bend relay ■ will operate with a slight delay (approximately 500 m5) and the The contact ■ is closed and the lamp L is turned on via the self-holding switch S W a = S W c, thereby reliably indicating that the product is in a standby state for product selection.

Note that at this time, both ends of the series circuit of the reset relay RE, the resistor R2, and the diode Di5 are short-circuited by the series circuit of the self-holding switch SW a =S W c, so the reset relay RE is not driven.

Next, if the operator switches and connects the selection switch PBb corresponding to, for example, an intermediate-priced product to the white circle contact side, the sales permission signal from the price terminal 3 of the coin mechanism CM is transmitted from the pen solenoid 5Lb to the selection switch P.
B b - P B c - Contact ral - A closed circuit of the power supply PS operates the relay RA (instantaneous action delay recovery type).

At this time, solenoid SLb is connected in series with high impedance relay RA, but not enough power is supplied to operate it.

At the same time, relay RA operates and its contact ra2
, ral moves to the operating contact side, and as a result, the pend solenoid SLb has the contact ■ - self-holding switch 5Wa.
-8Wc-Contact ral-Selection switch PBc~PBb-
Pend solenoid 5Lb-diode DS2-contact ra
2, it is connected to the power supply PS and is reliably activated.

Note that the circuit of relay-RA is cut off at its operating contact ral at the same time as its operation, but it is of the delayed recovery type (delay time 1
00m5), so it is maintained in operating condition as usual,
As a result, the above-mentioned drive circuit for the pend solenoid SLb is maintained, and the pend solenoid SLb is reliably activated.

Note that by closing contact ra2, diodes DS, ~DS
3. A negative signal relative to the power supply terminal 2 is applied to the reset terminal 6 via the resistors Ra to Rc and Rp, but the signal level is low due to the presence of the resistors Ra to Rc and Rp.
No reset operation is performed.

Due to the operation of the pen solenoid SLb, the self-holding switch SWb is switched to the white circle contact side, so even if the selection switch PBb is subsequently restored, the pen solenoid SLb continues to be energized, ensuring the ejection of the product. .

In addition, by switching the self-holding switch SWb, the reset relay RE, resistor R2 and diode D L5
Since the circuit that was shorting both ends of the series circuit of is cut off, a time delay (approximately 3
0 to 50 m5), the reset relay RE operates and closes the operating contact re of the sum, and connects the power supply PS, which is a reset signal source, to the reset terminal 6 of the coin mechanism CM, and connects the thyristors 5CRa and SCRc to the parallel connection side. , a power source PS is connected through the current limiting resistor Rp of the pen solenoids SLa to SLc.

In the coin mechanism CM, as mentioned above, when a reset signal is input to the reset terminal 6, the price terminal 3
．． 4. Stop output from 7.

Now, the output from the price terminal 3 is cut off, and simultaneously with the self-return of the relay RA, the gate signal divided by the gate signal dividing resistor Rb of the thyristor 5CRb is added, and the thyristor 5CRb is activated.

Therefore, pend solenoid SLb is thyristor 5CRb.
After that, the operation continues due to the rectified current (half wave) of the series circuit with.

Furthermore, due to the conduction of the thyristor 5CRb at this time, the price terminal 3 is connected to the power supply PS via the thyristor 5CRb, and as a result, is "reverse charged".

The operation of the coin mechanism CM based on this reverse charging is as described above.

In addition, one operating contact re of the reset terminal IJ RE is connected to a switch that connects the power to the reset terminal in order to give the reset signal, and after the sales permission signal is disconnected, power is supplied to the electromagnetic solenoid via the cyrisk. However, it is clear that the reset relay may be provided with two operating contacts for both of these switches.

On the other hand, when the output from the price terminals 3, 4.7 is cut off, the power to the pend relay (2) is cut off with a time delay (approximately 500 m5) based on the resistor R1 and the capacitor C1, and its contact (2) opens.

Then, the power to the pen solenoid SLb is cut off, the drive of the product ejecting mechanism is stopped, and the self-holding switch SWb is also reset.

Further, the reset relay RE is also de-energized with a time delay based on the resistor R2 and the capacitor C2 after the contact V is opened, and the contact re is opened.

In this way, the circuit returns to the state shown in FIG. 1 before the charge was charged.

In the above example, the selection switch PBb corresponds to a mid-priced product.
Although the explanation has been given on the case where the selection switch PBa or PBc is operated, it will be understood that the same circuit operation is performed when the other selection switches PBa and PBc are operated, and high-priced and low-priced products are discharged.

In addition, although we have explained the case where the sales permission signal is output from all price terminals 3, 4, and 7 of the coin mechanism CM, even if the sales permission signal is output from two or less terminals, the product corresponding to that terminal cannot be discharged in the same way. You can make it happen.

Furthermore, it is of course possible to modify the number of prices and the number of columns.

As described above, according to the present invention, the selection relay is omitted and the pend solenoid is energized with a rectified current (half wave), so there is no need to use a shaded coil. A control circuit for a vending machine can be obtained with a simple configuration and at low cost.

Note that, since the inrush current of the solenoid is carried out at DS1 to DS3, the current capacity of the SIRISK can be an inexpensive one since it only needs to have the capacity for the excitation current of the solenoid.

In addition, since the pen solenoids SLa to SLc are connected to the power supply PS and driven by the contact ra2 of the relay RA, the circuit of the price terminals 3 and 4.7 inside the coin mechanism CM is the selection switch P B a=P
Bc has the advantage that only a small current is required to drive the relay RA, and therefore no problem will occur even if the electric capacity becomes smaller due to the increase in the number of price terminals in the coin mechanism CM and the use of semiconductors in the price terminal circuit. There is.

Furthermore, simultaneously with the operation of the selection switches PBa"-PBc, the relay RA operates in response to the sales permission signal (price signal) from the coin mechanism CM, and at the same time as the operation, the pen solenoid SLa=SL c starts, and at the same time, the self-holding switches SWa to SWc switch to the power supply PS to continue the product delivery operation, so the selection switches PB a,=PB c and the refund lever (
The cancellation switch C8W in the coin mechanism C is operated by operating the refund lever.

) are operated simultaneously, the solenoids SLa to SLc
The operation is based on instantaneous energization of relay RA as described above.

In other words, when the relay RA is operated by the price signal, it becomes a selling operation, and when the price signal disappears before operating the relay RA, it becomes a refund operation, so both the operation of the pen solenoid 5LaS-8Lc and the refund operation are performed. Never.

Therefore, the operation of the refund lever (cancellation switch C8W operation)
- If the price signal disappears quickly and before the relay RA operates, the product will not be able to be sold, the product will not be delivered, and the reset signal will not be input to the coin mechanism.
A refund operation is performed.

On the other hand, even if there is a slight delay in the operation of the selection switch, if relay RA operates before the price signal disappears, there is a time of 200 m5 (specifications of the coin mechanism CM) until the coin mechanism refunds. The rise of the solenoid is 20-30m5. Since the time is as fast as 70 to 80 ms at worst, the solenoid operates before the coin mechanism performs the refund operation, performs a predetermined selling operation, and provides a reset signal to the coin mechanism, so the refund operation is not performed.

As is clear from the confusion in the above embodiment, according to the present invention, the selection relay is omitted and the current becomes rectified (half wave) after the pend solenoid is attracted, so there is no need to use a shade coil. Therefore, a control circuit for a vending machine equipped with a multi-price coin mechanism and capable of selling a plurality of types of products with different prices can be obtained with a simple configuration and at low cost.

In addition, "reverse charging" is controlled by a cyrisk circuit that is used as a result of omitting the selection relay, so it is highly reliable, and even if a minute current is used for this "reverse charging", the selection relay Problems such as malfunction due to the inability to obtain a self-cleaning effect of the contact portion, unlike when control is performed using the contact point, do not occur.

Note that the current capacity of the Cyrisk only needs to be the capacity for the excitation current of the solenoid, so an inexpensive one can be used.

Moreover, according to the present invention, the circuit of the third switch ra2 and the diode DS and the first delayed recovery relay RA
As soon as you press the selection button, the energizing circuit for the electromagnetic solenoid that drives the product ejection mechanism is set, and normal sales operation is performed. Therefore, by simultaneously operating the selection button and return lever, product ejection and refund can be performed. A erroneous operation in which both are performed is prevented.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is another embodiment of the lamp drive circuit in FIG. 1, and FIG. 3 is a still further embodiment. CM・・・Coin mechanism, SLa, SLb
+SLc...Pend solenoid, PS...
...Alternating current, 3.4.7...Price terminal, 6...Reset terminal, ■...Bend relay 5CRa, 5CRb. S CRc-Sirisk, SWa, SWb, SWc・
...Self-holding switch, PBa, PBb, P,
Bc...Selection switch, RE...Reset relay L...Lamp, RA...
Pend solenoid drive relay C8W... Coin mechanism cancellation switch.

Claims (1)

[Scope of utility model registration request] a multi-price coin mechanism, which includes a plurality of price terminals and a reset terminal, and has a function of performing a refund operation if the reset terminal reset signal is not inputted within a certain period of time after receiving a refund signal by operating a refund lever; In a vending machine equipped with a plurality of electromagnetic solenoids that drive a mechanism for discharging products and a product selection button switch, a plurality of A first switch is provided, and each of the plurality of electromagnetic solenoids is connected in series to each of the electromagnetic solenoids, and each series circuit of the electromagnetic solenoid and the electromagnetic solenoid is connected to a common second switch and the first switch corresponding to each of the electromagnetic solenoids. The price terminals of the coin mechanism are connected to a power source through a switch, and the price terminals of the coin mechanism are connected to a common connection point between the electromagnetic solenoid and the cyrisk, and the common connection point is connected to a common third connection point through a diode. It has a configuration in which it is connected to a power source in parallel with the second switch via a switch, and when the selection button is pressed while the price signal is being output from the price terminal, it receives the price signal. a first delayed return relay that operates to close the third switch; and when any of the plurality of first switches closes, the relay operates with a delay to close the second switch;
a second relay that closes the switch and connects a power source as a reset terminal heliset signal of the coin mechanism, and a circuit that ignites the cyrisk when the second switch is closed. A control circuit characterized by: