KR830000457Y1 - Control circuit of vending machine - Google Patents

Abstract

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Description

Control circuit of vending machine

1 is a control circuit diagram of a conventional vending machine.

2 is a flowchart illustrating the operation of the control circuit diagram of FIG.

3 is a control circuit diagram of a vending machine according to the present invention.

4 is a flowchart showing the operation of the control circuit diagram of FIG.

The present invention aims to prevent the so-called multiple sale in which a large number of products are sold at a single rate due to a malfunction due to a shock during sale in a vending machine having a single price curing device.

FIG. 1 shows a control circuit of a vending machine having a conventional single price hardening device and FIG. 2 shows its operation. The hardening apparatus 10 connected to the power supply 1 and 2 is comprised so that when hardening is input, it sorts and counts, and it is comprised so that a sales instruction may be given.

In the selling standby state, the curing apparatus 10 turns off the a contact point XV ₁ of the band relay XV which outputs a selling command and the b contact point XV ₂ is turned on. Therefore, a voltage is delivered from the power supply 1 to the terminal 7 and a voltage is generated at the terminal 7 (see also second (c)). [Refer also to 2 (a)] by putting the coin to the set price. When the relay XV operates and the contact XV ₁ is turned on, the contact XV ₂ is turned off, so the voltage of the power supply 1 is induced to the terminal 3 and the sales command is generated from this. . [See also second (b)] In the meantime, terminal 7 is disconnected. Since relay XV returns after a certain time of operation, the selling command voltage at terminal 3 becomes a pulse voltage of a certain time (several 100 milliwatts) width, whereby the curing relay-X _B is a band relay which is followed by the selling command pulse. Excitation is first through the b contact X ₁ of -X. See also second (d). Thus, the a contact Wb ₁ is continued and the operating relay-X _A is also excited by the selling command pulse via the contact b ₁ of the curing relay-X (see also second (e)). When the active relay -X _A is excited, the three a contacts X _A1 , X _A2 and X _A3 held by the relay -X _A are connected. First, when contact a a X _{A1 is} connected, the curing relay -X _B and the working relay-X _A are connected between the power supply 1,2 via contact a X _A1 , X _B1 and b contact X ₁ and irrespective of the sales instruction from terminal 3 Own it. The relay-X, which moves the goods transport mechanism, is configured to be energized through the contact X _A2 at the terminal 7, and after the contact X _A2 is connected, the sales command pulse disappears and passes through the power supply 1 of the terminal 7 (2 (b)). See also second (c)] Relay X operates (see also second (f)). Therefore, contact b ₁ which has formed the self-holding circuit between the relays X _B and X _A is opened, so that the relays X _B and X _A are energized. On the other hand, since the contact point X _A3 and the contact point X ₂ of the relay X are inserted into the excitation circuit of the solenoid S of the goods transport mechanism, the solenoid S operates and the merchandise is sold only while the relays X _A and X ₁ are in operation. . However, the operation relay-X _A, which has an open self-holding circuit, is cut off by 500 to 800 milliseconds late to end the sale.However, if the relay-X _A is in delayed operation, an external shock is applied to the curing device. If the impact is considered to cause the contact of the band relay or the like in the curing apparatus 10 to be peeled off, in that case, the energization of the relay-X moving the goods transport mechanism is opened, and the solenoid S returns to the origin. As the malfunctioning band relay returns to the origin, the relay-X is excited again to connect the contact point X ₂ , and the second product is taken out. [See periods t ₅ to t _{7 in} FIGS. 2 (c) to 2 (g)]. As can be seen from the above continuation diagram, as shown in the operation diagram of the control circuit of FIG. 2, the relay-X, which moves the goods conveying mechanism, also operates at least twice during the operation of the operation relay-X _A. Therefore, solenoid S works together. Thus, while the operation relay-X _A is performing the delay operation, there is a drawback that a large number of sales are carried out for a single charge. The present invention is intended to eliminate these drawbacks, and the circuit configuration and operation thereof are shown in the embodiments of FIGS. 3 and 4, and only the parts different from the conventional example in the continuous diagram are described. That is, in the conventional circuit, the excitation power supply of the relay-X moving the goods transport mechanism is taken from the terminal 7 of the curing apparatus 10, but the circuit of the present invention is taken directly from the power supply 1,2 through the contact X _A2 of the operation relay-X _A. . As can be easily understood, once the relay-X is excited, the relay-X is held energized until the contact X _A2 is opened. Therefore, irrespective of whether the terminal 7 is energized due to an impact or malfunction of the band relay in the curing apparatus, the operation process diagram of FIG. 4 (in this FIG. 4, the operation from t ₁₀ to t ₁₂ is the same as that of the conventional apparatus). Even if the terminal 7 is energized twice as shown in Fig. 4), while the relay-X _A is excited, the period of t ₁₁ to t ₁₃ in FIG. 4, that is, the contact X _A2 is connected. While the relay-X does not release the exciter while it is present (see also section 4 (f)), it does not malfunction until the end of the sale of the product for a one-time fee. In addition, the terminal 7 may be omitted if it is not used for another circuit. The above-described circuit configuration can eliminate the defect of erroneously selling a large number of products by curing one product.

Claims (1)

It is set from a band relay (X) and a single price hardening device having a contact (X ₂ ) inserted into the merchandise carrying solenoid (S) and the energizing circuit to the solenoid (S) and energized directly from the power supply (1, 2). The contact (X _B1 ) of the hardening relay (X _B ) and the hardening relay (X _B ), which are excited through the b contact (X) of the band relay (X) according to a sales command of a predetermined pulse width generated when the price is completed. And an operating relay (X _A ) having a contact (X _A1 ) which is connected in parallel to the coil relay and forms a magnetic retention circuit for the parallel connection circuit, and two a contacts other than this operating relay ( X _A2 , X _A3 ) is inserted into the feed circuit of the solenoid (S) and the band relay (X), respectively.