JPS5929915B2 - Vending machine control circuit - Google Patents

Description

Detailed Description of the Invention The present invention provides an automatic vending machine that is equipped with both a solenoid-type dispensing mechanism for selling products such as certified drinks and a motor-type dispensing mechanism for selling products such as bottled drinks, and selling both products together. Regarding the control circuit that controls the product delivery mechanism of the machine, in particular, the control circuit element is commonly used to control both product delivery mechanisms, and the configuration of the control circuit is automatically switched depending on the type of drive source for the delivery mechanism. This is a simplified version of

In general, in vending machines for verifying and bottling beverages, etc., a dispensing mechanism driven by a solenoid is used for the can, and a dispensing mechanism driven by a motor is used for the bottle.

A solenoid-type unloading mechanism that handles cans that are difficult to break is driven by a solenoid and is activated with impact to unload items one by one, whereas a motor-type unloading mechanism that handles easily breakable bottles has a constant rotation of the motor. The products are moved one by one and transported one by one.

Therefore, in accordance with this difference between the two delivery mechanisms, the manner of controlling the delivery mechanisms is also different, and the configurations of the control circuits are also different.

Therefore, in conventional vending machines that sell cans and bottles together, separate control circuits were provided for the solenoid-type dispensing mechanism and the motor-type dispensing mechanism, so the product dispensing mechanism control circuit The disadvantage is that the configuration is large-scale and complicated, and therefore expensive.

In other words, the solenoid-type unloading mechanism requires a time-limiting element to control the energization time of the solenoid as a drive source, whereas the motor-type unloading mechanism requires
As mentioned above, it is necessary to perform time-limited control for moving a certain amount by a movement amount detection means provided in the unloading mechanism itself, that is, a rotation amount detection means linked to the rotation of the motor.

- 10,000, each of those product delivery mechanisms is activated by a sales signal that is generated when the amount of coins inserted into the coin sorting and counting mechanism of the vending machine is equal to or exceeds the sales price set for each product. It is starting to operate.

Therefore, the control circuits for these product delivery mechanisms all include drive relays that start operating the solenoids and motors in response to the sales signal described above, and
Once the product discharging mechanism starts operating, it is necessary to have a means for stopping its operation by the above-mentioned time-limiting action and at the same time returning the coin sorting and counting mechanism, the drive mechanism, and the time-limiting element to their respective standby states. be.

Moreover, the return means can be used in common for the control circuits respectively corresponding to both product delivery mechanisms.

An object of the present invention is to eliminate the above-mentioned conventional drawbacks, simplify the circuit configuration by commonizing the main circuit elements in the control circuits corresponding to the solenoid-type unloading mechanism and the motor-type unloading mechanism, and To provide a control circuit for a vending machine for selling different types of products together, which does not interfere with the original functions of the circuits.

That is, the control circuit of the present invention is capable of transmitting a sales signal from a coin sorting and counting mechanism in a vending machine equipped with a product delivery mechanism driven by a motor and a product delivery mechanism driven by a solenoid depending on the type of product to be sold. There is a drive relay that selectively operates in response to the product selection switch operated when the product selection switch is operated to drive the motor or solenoid, respectively, and a drive relay that is energized when the drive relay is activated and normally closes the motor carrier switch. A first time-limited auxiliary relay that has a self-holding circuit via contacts and returns with a delay after energization is stopped, and a normally closed contact of a carrier switch of the motor and a normally closed contact of the first time-limited auxiliary relay in a sales standby state. and a second time-limited auxiliary relay that is energized through a series circuit of the auxiliary relay and returns with a delay after the energization is stopped, and the self-holding circuit of the first auxiliary relay is energized, and the normally open contact of the second time-limited auxiliary relay is energized. This is done through a series circuit between the normally closed contact of the solenoid drive relay used to selectively operate the drive relay and a diode, and between the normally open contact of the first time-limited auxiliary relay and the first time-limited auxiliary relay. The present invention is characterized in that a reset signal is sent to the coin sorting and counting mechanism through a series circuit with the normally closed contact of the second time-limited auxiliary relay.

The invention will be explained below by means of exemplary embodiments with reference to the drawings.

In the configuration of the control circuit of the present invention shown in FIG.
A coin sorting and counting mechanism, that is, a so-called coin mechanism, sorts the coins inserted into the vending machine and counts the total amount, and when the total amount reaches the selling price set for each product. A sales signal is sent only to the products in response to the depression of the product selection button.

Further, S is a solenoid, and M is a motor, which drive the respective product delivery mechanisms when energized.

Furthermore, Xs is a drive relay for the solenoid S, and xM is a drive relay for the motor M, which actuate and return instantly.

On the other hand, XA and XB are both auxiliary relays of the instantaneous operation return delay type, and return after a predetermined time period determined by a CR time constant circuit connected in parallel to each excitation coil after the energization is stopped.

Further, MS is a motor carrier switch, which is interlocked with the motor M, operates after an appropriate period of time has elapsed after the motor M starts rotating, and returns when a predetermined rotation amount is reached.

In the first illustrated control circuit having the above-described main components, the reset circuit for the coin sorting and counting mechanism CM is shared by the control circuit for the solenoid S and the control circuit for the motor M of the drive source of the product delivery mechanism. , the time-limited auxiliary relays XA and x13 are used, and the time-limited auxiliary relays XB are also used as time-limiting elements for the operation of the solenoid S, and the motor carrier switch MS is used as the element for stopping the operation of the motor M.
Additionally, time-limited auxiliary relays XA and XB reset drive relays Xs and xM for solenoid S and motor M.
In addition, the energization of the drive relay Xs of the solenoid S is limited to a predetermined time, and the energization time of the drive relay XM of the motor M is not limited by the relay. In order to perform control by automatically switching the configuration of the control circuit so that the legs can be propped only by the amount of rotation, a drive relay Xs is provided.

A diode D is commonly inserted in the xM contact circuit.

Next, for the configuration and operation of the control circuit of the present invention shown in FIG. 1, refer to the operation timing chart of each part during solenoid control shown in FIG. 2A and the operation timing chart of each part during motor control shown in FIG. 2B. This will be explained in detail.

First, regarding the control mode number for the solenoid S, a sales signal VD in the form of a positive voltage is selected from the coin sorting and counting mechanism CM based on the result of comparing the amount of coins inserted and the set price of the sold product. Commonly applied to drive relays Xs and XM.

In this state, when the product selection switch Ps corresponding to the product to be driven by the solenoid S is turned on, the solenoid drive relay Xs is selectively energized.

When the solenoid drive relay Xs is energized, the normally open contact Xs is closed, and the power of the solenoid S of the solenoid S and the motor M is in a standby state.

At the same time, the normally open contact Xs3 is closed and the drive relay Xs self-holds, the normally closed contact XS4 is opened and the contact circuit of the motor drive relay xM is separated, and the normally open contact X8t is closed. At the same time, the sales signal VD is applied to the auxiliary relay XA, and the normally closed contact XS2 is opened to separate the voltage application side of the motor drive relay xM.

In short, the auxiliary relay XA is instantaneously excited and operated by the application of the sales signal VD, but since the capacitor C connected in parallel to the excitation coil is also charged via the resistor R, the supply of applied voltage is interrupted. Even after the capacitor C is discharged, it continues to be excited, and after a predetermined time determined by the CR time constant has elapsed, it returns with a delay.

When auxiliary relay XA operates, normally closed contacts XAt and
A3 is opened and normally open contacts XA2 and XA4 are closed.

Another time-limited auxiliary relay Xs that works together with this time-limited auxiliary relay XA is the normally closed contact MS1 of the motor carrier switch and the auxiliary relay
When the auxiliary relay xA is activated by the application of the sales signal VD and the normally closed contact XA3 is opened, the timing chart shown in Fig. 2A appears. After a predetermined time period determined by the C'W time constant circuit connected in parallel to the excitation coil, the motor returns to the non-operating state with a delay.

Due to this timed return of auxiliary relay XB, each of its contacts returns to its normal state, contact XBt is opened, and contacts XB2 and XB3 are closed.

Note that when the auxiliary relay xA operates and its normally open contact XA2 is closed, the normally closed contact MS of the motor carrier switch
1 and this contact X A 2, the power supply voltage is applied to the auxiliary relay xA, and the power supply voltage is further applied to the drive relay As shown in Figure 2A, the contact point X mentioned above
By closing A4 and the above-mentioned contact XB2, a power supply voltage is applied to the reset terminal RES of the coin sorting and counting mechanism CM, the coin sorting and counting mechanism CM is reset, and the sales signal VD that had been sent out until then is auxiliary. Relay X
Even though power is removed from A and drive relay Xs, those relays XA and Xs are still in operation.

However, in one sword, contact XBt of auxiliary relay
By returning to the open state described above, the return path on the negative power supply N side of the auxiliary relay xA is cut off, and its contact XBt
a drive relay Xs connected in parallel between and a negative power supply N;
The contact circuit of XM is also in a cutoff state during the above-described solenoid control because the contact X84 connected in series with the inserted diode D is open.

Therefore, even if the time-limited auxiliary relay XA is connected to the positive power supply P by closing the contact XA2, the negative power supply N side is cut off by opening the contact XBI, so that after the time-limited auxiliary relay is capacitor C
Since it is excited only by the discharging current of the capacitor C flowing through the closed circuit consisting of the resistor R and the excitation coil, as shown in Fig. 2A, after the predetermined time determined by the CR time constant has elapsed, the non-operating state is reached. to return to.

At the same time, by returning the aforementioned time-limited auxiliary relay Since the positive power source P is connected to the solenoid S through the solenoid S, the solenoid S is energized and drives the product delivery mechanism, and the product corresponding to the product selection switch Ps that was previously turned on is sold.

Therefore, when the contact XA2 is opened and the supply of power supply voltage to the drive relay Xs is cut off due to the time-limited return of the auxiliary relay XA to the non-operating state, the power supply to the solenoid S is interrupted. When the contact XA3 is closed and the power supply voltage is supplied to the auxiliary relay xB, the auxiliary relay xB becomes the operative state again, and therefore, at the time when the contact X85 and the contact XB3 are opened at the same time. , will be stopped.

At this point, the return of the auxiliary relay xA to the inoperative state opens its contact XA4, and at the same time, the contact
When A3 is closed, auxiliary relay xB operates and contact XB2
is also opened, the supply of power supply voltage to the reset terminal RES of the coin sorting and counting mechanism CM is also cut off, and therefore,
All the components in the control circuit shown in the first diagram return to the initial standby state, and the operation of controlling the solenoid-type product delivery mechanism is completed.

As is clear from the above explanation, in the case of solenoid-type unloading mechanism control, in response to turning on the product selection switch Ps,
Solenoid drive relay Xs is coin sorting and counting mechanism CM
is selectively energized by the sales signal VD from the solenoid S to selectively put the solenoid S into the energized standby state, and at the same time, temporarily put the time-limited auxiliary relay XB into the deactivated state through the operation of the time-limited auxiliary relay XA. The coin sorting and counting mechanism CM is reset at the same time as the timed return of the auxiliary relay xB causes the solenoid S to drive the discharging mechanism, and the timed return of the auxiliary relay Each control circuit element is caused to return to a standby state, including stopping energization.

Therefore, all time-limiting functions of the control circuit, including control of the energization time of the solenoid, are performed by the time-limiting auxiliary relays XA and XB.

Next, the manner of controlling the motor M will be described.

With the sales signal VD being sent from the coin sorting and counting mechanism CM in the same manner as in the control of the solenoid S,
When the product selection switch PM corresponding to the product to be driven and transported by the motor M is turned on, its contact is opened and the product selection switch P of the solenoid drive relay Xs is turned on.
The circuit s is separated, contact a is closed, and drive relay XM is instantaneously energized.

By energizing the motor drive relay xM, its normally open contact XM3 is closed, and the motor M is selectively placed in a standby state for energization.

At the same time, the normally open contact XM2 is closed and the 1 drive relay xM is self-holding, and the normally open contact XMt is closed and the sales signal VD is applied to the auxiliary relay XA.

When the sales signal VD is applied to the auxiliary relay XA as described above, the auxiliary relay xB returns to the inoperable state for a limited time through the instantaneous operation of the auxiliary relay XA, and the auxiliary relay As shown in FIG. 2B, the control process from starting energization to the motor M to simultaneously resetting the coin sorting and counting mechanism CM is exactly the same as the control for the solenoid S described above.

However, when the timed return of the auxiliary relay XB to the inoperative state opens its contact
Since the normally closed contact X84 of the solenoid drive relay Xs is connected to the negative power supply N in parallel with B1 via the diode D, a negative power supply N side return path of the auxiliary relay XA is formed.

Therefore, as can be seen from Figure 2, the auxiliary relay
Even after the timed return of auxiliary relay XB to the inoperative state,
Note that the motor carrier switch is continuously operated by the power supply voltage supplied through the normally closed contact Mst and the contact XA2 of the motor carrier switch.

In the case of controlling the motor M, as described above, when the auxiliary relay xB returns to the non-operating state in a timed manner and the motor M starts to be energized and starts rotating, the schematic auxiliary relay xB shown in FIG. As shown in the figure, in the motorized product delivery mechanism 2 in the vending machine 1, the products are placed one by one on the shelves T attached at equal intervals to the chain belt 6 that is hooked to the pulleys 5 and 5' which are rotationally driven by the motor M. Each time the stored bottles 4 are moved by a distance equal to the mutual spacing between the shelves T and the motor M is activated, they come off the shelves 1 one by one and fall into the product outlet 3, where they are sequentially carried out.

This fixed distance movement of the shelf 1 containing the bottles 4 is carried out by the motor M.
This is performed by rotating the motor M by a certain amount, and the certain amount of rotation of the motor M is controlled by a rotation amount detection means as shown in FIG.

That is, in the rotation amount detection means shown in FIG. 4, the motor M (
(not shown), and the cam body 8 is attached so as to rotate together, and the tip of the contact spring of the carrier switch 9 is brought into elastic contact with the outer peripheral surface of the cam body 8.

When the motor M is in a standby state where the motor M is stopped, the tip of the contact spring falls into the recessed part of the cam body 8, and the contact MS2 of the carrier switch 9 is normally open.
1 is configured to be normally closed.

Therefore, one rotation of the pulley 5 causes the chain belt 6 to
If the shelf 1 attached to the cam body 8 is moved by a predetermined distance and the length of the recessed portion of the cam body 8 in the circumferential direction is appropriately set, the aforementioned non-operation of the auxiliary relay XB can be prevented. After a suitable period of time has elapsed since the motor M started rotating due to the timed return to the state, the carrier switch 9 is actuated and its normally open contact MS2 is closed and its normally closed contact MS1 is opened.

When the normally open contact MS1 of the motor carrier switch is closed as described above after an appropriate period of time has elapsed after the motor M starts rotating due to the return of the auxiliary relay xB to the inoperative state, the motor M becomes self-holding. Therefore, the subsequent rotation of the motor M is controlled only by the carrier switch 9 according to the rotation of the cam body 8.

At the same time, by opening the normally closed contact MS2 of the motor carrier switch MS, the auxiliary relay
Since the supply of power supply voltage to A is cut off, the auxiliary relay XA returns to the non-operating state after a predetermined time determined by the CR time constant has elapsed, as shown in FIG. 2B, and the contact XA4 returns to the non-operating state. , the contact XA4 is opened, the power supply to the reset terminal RES of the coin sorting and counting mechanism CM is cut off, and at the same time, the drive switch XM is also returned to the inoperative state.

In other words, the drive of the motor-type product delivery mechanism by the rotation of the motor M, which is self-held as described above, is different from the case of driving the solenoid-type delivery mechanism, and the auxiliary relay XA described above
Irrespective of the return to the normal state, the cam body 8 rotates once and stops when the tip of the contact spring of the motor carrier switch 9 falls into the recessed part of the cam body 8 again.

Each contact MS of the motor carrier switch at that point
12MS2 returns to normal state, contact MS is closed again and auxiliary relay xB is operated again, at which point all components of the control circuit return to the standby state of the vending machine and control over motor M is resumed. Complete.

As is clear from the above explanation, in the case of motor-type unloading mechanism control, the same circuit operation as in solenoid-type unloading mechanism control is performed until the motor M starts rotating, but the contact circuit of the drive relay Due to the action of the inserted diode D, only the coin sorting and counting mechanism reset circuit is controlled by the timed return of the auxiliary relay XA, and the motor M
The rotation of is self-controlled by the motor carrier switch.

According to the present invention, in the two-mode control operation of the combination control circuit of the solenoid-type dispensing mechanism and the motor-type dispensing mechanism as described above, the time-limited control for resetting the coin sorting and counting mechanism is performed in common by a time-limited auxiliary relay. .

The separate control of the product delivery mechanism drive source is automatically switched depending on the product selection by inserting a diode, and only two auxiliary relays are required, so product delivery in such vending machines that sell different products together is easy. A mechanism control circuit can be configured easily and inexpensively.

It goes without saying that the specific configuration of the control circuit of the present invention described above may be modified in various ways without departing from the gist of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of the control circuit of the present invention;
Figures 2A and B are timing charts respectively showing examples of the timing of the control operations. Figure 3 is a diagram schematically showing an example of the configuration of the motorized product delivery mechanism. Figure 4 is the amount of rotation of the motor. FIG. 3 is a diagram schematically showing a configuration example of a detection means. CM・・・Coin sorting and counting mechanism, M・・・・・・
Motor, S... Solenoid, XM, Xs...
... Drive relay, XA, XB ... Time-limited auxiliary relay, MS12MS2 ... Motor carrier switch contact, 1 ... Vending machine, 2 ...
Motorized product delivery mechanism, 3...Product delivery port, 4
...Bottle, 5, 5'-...Pulley, 6.
...Chain belt, T...Shelf, 8...
...Cam body, 9...Carrier switch.

Claims (1)

[Claims] 1. In a vending machine equipped with a product delivery mechanism driven by a motor and a product delivery mechanism driven by a solenoid according to the type of product to be sold, a sales signal is sent from a coin sorting and counting mechanism. The motor or the solenoid is selectively activated in response to a product selection switch operated while the product is in use. A first time-limited auxiliary relay that is energized when the drive relays are activated, has a self-holding circuit via the normally closed contact MS of the carrier switch of the motor, and returns with a delay after the energization is stopped. XA, and a second time limit which is energized through a series circuit between the normally closed contact of the carrier switch of the motor and the normally closed contact XA3 of the first time limit auxiliary relay ° in the sales standby state, and returns with a delay after the energization is stopped. auxiliary relay XB, energizing the self-holding circuit of the first auxiliary relay via the normally open contact This is done through a series circuit between the normally closed contact XS4 of the solenoid drive relay Xs used for activation and the diomide D, and the normally open contact XA4 of the first time-limited auxiliary relay and the second time-limited contact. A control circuit for a vending machine, characterized in that a reset signal is sent to the coin sorting and counting mechanism through a series circuit with a normally closed contact XB2 of an auxiliary relay.