JPS6225821Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention provides a vending machine having two product dispensing devices, in which when one product dispensing device runs out of products, the product is taken out from the other product dispensing device, The present invention relates to a power outage protection circuit for cycle payout in which products are paid out alternately.

BACKGROUND ART FIG. 2 is a control circuit diagram of a conventional circular dispensing device, in which G1 to G3 are AND gates, G4 is an OR gate, I1 to I4 are inverters, 1 and 2 are product dispensing devices, and 3 is a flip-flop (hereinafter referred to as FF
), SW1 and SW2 are the product dispensing device 1,
The product sold out detection switch in 2 switches from H level to L level when the product is sold out. Assume that both dispensing devices also have products and FF3 is in the reset state. At that time, when the payout signal is input, since the output of the OR gate G4 is at the L level, no output is output from the AND gate G1, and an output is output from the AND gate G2 to operate the first payout device 1 and produce the product. pay out. In this way, products are sequentially dispensed from the first dispensing device each time the dispensing signal is input, and when the products in the first dispensing device 1 are sold out and the product sold-out detection switch SW1 outputs an L level signal, AND gate G2 closes and AND gate G1 opens. Therefore, the next payout signal sets FF3 via the AND gate G1, and the output of the AND gate G1 pays out the product from the second payout device 2.
Dispense the goods from. In the meantime, even if the first dispensing device 1 is replenished with products, since FF3 is set, the AND gate G2 is closed and the AND gate G1 is opened, and the products are dispensed from the dispensing device 2. When the product in the dispensing device 2 runs out, the product sold out detection switch is activated.
Since an L level signal is output from SW2 to reset FF3, the product is dispensed from the dispensing device 1 with the next dispensing signal.

Problems that the invention attempts to solve As mentioned above, with the conventional ring dispensing device,
Since the dispensing device is selected by switching FF3, when both dispensing devices are replenished with products, if power is temporarily cut off to the device due to a power outage, etc., and then returns, FF3 will be in the reset state. Therefore, for example, what was being dispensed from dispensing device 2 before the power outage will be dispensed from dispensing device 1 after the power is restored.
It will be paid out from Then, all the products in the dispensing device 1 are dispensed, and the products are again dispensed from the dispensing device 2, but there are few products in the dispensing device 2 (for example, one item), and the products are immediately sold out, which is not desirable in terms of sales management. A phenomenon occurs in which there is no such thing.

This is because, in card vending machines used in public telephones, the number of cards that can be put into the hopper of the payout device is regulated, and only a fixed number of units can be refilled. Therefore, the dispensing devices 1 and 2
The phenomenon described above occurs because replenishment is not possible until the remaining amount reaches a certain amount (for example, zero). Sales management is difficult for card vending machines, etc.

Therefore, the purpose of this invention is to provide a power failure protection circuit that will not change the dispensing device even if the power supply is stopped due to a power outage or power switch being disconnected, when dispensing products from the two dispensing devices of a vending machine. It is about providing.

Means for solving the problem The present invention consists of two product dispensing devices, a set,
and a flip-flop for selecting one of the above product dispensing devices according to the reset state,
In a cycle dispensing device, the product is dispensed from the product dispensing device selected by the flip-flop in response to a dispensing command signal, and the flip-flop is switched in response to a sold-out detection signal from the product dispensing device. A latch relay is provided which is set by a command signal and reset by a dispensing command signal to the other flip-flop, and an AND output of the set output of the latch relay of the product dispensing device selected in the state of at least one of the above-mentioned flip-flops and the power supply rise signal after power supply is restored. The above problem was solved by connecting the flip-flop to be in one of the states.

Operation When a power outage occurs while the circular dispensing device is dispensing products from one of the product dispensing devices, and the power supply to the vending machine is temporarily stopped and then restored, each of the above latch relays will be activated before the power supply stops. Since the product dispensing device in the state is memorized, the product dispensing device on the latch relay side that is set is set by the AND output of the set output of one latch relay and the power supply start signal after the power supply is restored. Activate the flip-flop to select . If the flip-flop is of a type that is reset when the power supply is cut off, the flip-flop may be set by the AND output of the set output of the latch relay of the product dispensing device selected in the set state and the power supply rise signal; If the flip-flop is of a type in which it is not stable whether it is in the set or reset state after the power supply is stopped and restored, input the set output of the latch relay of each product dispensing device and the power supply rise signal to the AND circuit, and set the flip-flop. By inputting the output of each AND circuit to the set/reset input terminal of the above-mentioned flip-flop so that the product dispensing device on the latch relay side that has been selected is selected, when the power is restored, the product dispensing device that was selected before the power outage is selected. Devices can be selected.

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

FIG. 1 shows an embodiment of the power failure protection circuit of the present invention, and the same parts as in FIG. 2 are given the same symbols. The difference from the conventional example in FIG. 2 is that the payout devices 1 and 2 are provided with latch relays 4 and 5 to store the currently payout device, and that the power supply rising signal and the latch relay of the second payout device are AND gate G5 whose input is the set output of
An OR gate G6 is provided to input the output of the AND gate G5 together with the output of the AND gate G1, and the output of the OR gate G6 is input to the set terminal of the FF3.

Next, the operation of this embodiment will be described.

It is assumed that there are products in both dispensing devices and that FF3 is in a reset state, for example. When the payout signal is input, as in the conventional example, the AND gate G1 is closed because there is no output from the OR gate G4, and the AND gate G2 is opened and outputs a signal, and the payout device 1
is input, the latch relay 4 is set, and the product is dispensed. On the other hand, the above signal is also input to the reset terminal of the latch relay 5 of the dispensing device 2. When the product in the dispensing device 1 runs out, the product sold-out detection switch SW1 outputs an L level signal, so the next dispensing signal is output from the AND gate G2.
closes, opens AND gate G1, sends a signal from AND gate G1, and passes through OR gate G6.
At the same time as the FF3 is set, it is input to the payout device 2, the latch relay 5 is set, and the latch relay 4 of the payout device 1 is reset. Thereafter, the second dispensing device 2 dispenses the merchandise, and when it runs out, the FF 3 is reset and the first dispensing device 1 dispenses the merchandise again. The points mentioned above are
It's no different than before. The feature of the present invention is that the effect is different when the power supply is temporarily stopped during a power outage during such dispensing. In other words, before the power outage,
When the product is being dispensed from the second dispensing device 2, the signal from the set terminal of the latch relay 5 and the power supply start signal are input to the AND gate G5 as soon as the power is restored.
6 to the set terminal of FF3,
To set this, the AND gate G1 is opened, and the product will be dispensed from the second dispensing device 2 from before the power outage in response to the subsequent dispensing signal.

In addition, when the power is cut off during dispensing from the first dispensing device 1 and the power is restored the next time, the FF3 is automatically reset, so the AND gate G2 is opened.
Even after power is restored, products will still be dispensed from the first dispensing device.

In the above embodiment, the circuit consisting of the inverters I3 and I4 and the AND gate G3 is a sold-out detection circuit, and when the products in the first and second dispensing devices 1 and 2 run out, it outputs a signal and displays a sold-out display, etc. It is something to do. Further, from the viewpoint of sales management, the signals from each sold-out detection switch SW1 and SW2 may be displayed to notify the product of the product replenishment time.

Furthermore, in the above embodiment, the FF3 is of a type that is automatically reset when the power is turned on. However, when the FF3 is of a type in which it is unclear which direction it will be stable in when the power is turned on, the latch relay of the first dispensing device 1 may be reset. It is sufficient to AND the set terminal output of the inverter I2 and the power supply rise signal, and input that output and the output of the inverter I2 to the reset terminal of the FF3 through an OR gate.

Effects of the invention As described above, the present invention memorizes the dispensing device before the power outage and dispenses products from the same dispensing device even after the power is restored, so the product replenishment interval does not fluctuate drastically. This is convenient for sales management. Particularly in the sale of cards used for telephones, where the number of replenishable products is limited and only a certain unit amount can be replenished, it is not possible to replenish an arbitrary number of cards, and replenishment is not possible unless the product in the dispensing device runs out. In such products,
With this invention, even if there is a power outage etc. during a power outage, the product will always be dispensed from one dispensing device after the product runs out before the product is transferred to the next dispensing device. Since replenishment periods are given at intervals, this is very convenient in terms of sales management.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a control circuit diagram for a conventional product cycle payout. 1, 2... Product dispensing device, 3... Flip-flop, 4, 5... Latch relay, G1 to G3,
G5...AND gate, G4, G6...OR gate, I1-I4...Inverter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) It has two product dispensing devices and a flip-flop that selects one of the above product dispensing devices according to the set or reset state, and the above-mentioned flip-flop is activated by a dispensing command signal. In a cycle dispensing device which dispenses a product from a selected product dispensing device and switches the flip-flop according to a sold-out detection signal from the product dispensing device, each product dispensing device is set by a dispensing command signal to itself and sent to the other device. A latch relay is provided which is reset by a dispensing command signal, and the flip-flop is reset to the one state by the AND output of the set output of the latch relay of the product dispensing device selected in at least one state of the flip-flop and the power supply start-up signal after the power supply is restored. A power outage protection circuit for the cycle dispensing device. (2) The above-mentioned flip-flop is a flip-flop which enters the reset state when the power supply is stopped and restored, and the above-mentioned flip-flop is set by the set output of the latch relay of the product dispensing device selected in the set state of the flip-flop and the AND output of the power supply rise signal. A power outage protection circuit in a cycle dispensing device according to claim 1 of the utility model registration claim. (3) The flip-flop mentioned above is a flip-flop whose set and reset states are not determined when the power supply is stopped and restored, and the set output of the latch relay in each product dispensing device is input to the AND gate together with the power supply rise signal, and each AND A power outage protection circuit in a cycle dispensing device according to claim 1, wherein the output of the gate is input to the input terminal of a flip-flop so as to select the product dispensing device on the latch relay side having a set output.