JPS5818674B2 - How to get the job done - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses coin acceptance and product selection switch operation to prevent failure of one or more series in a product conveyance system in a vending machine that sells several types of products. The present invention relates to a control device designed to allow the sales purpose to be freely achieved without causing any trouble to other non-faulty series.

Next, a description will be given of an embodiment whose details are shown in the appendix. Reference numeral 1 denotes a coin switch, and this switch 1 is inserted in series with a pendrelay Rv and between a power source Eo.

Further, PB1, PH2, and PH1 are a plurality of product selection switches connected in series via the a-contact R-al of the pendry relay Rv, and each switch FBI'.

・Relays X1°X2. correspond to PH2 and PH1, respectively.
X3 are provided in series, and the a-contacts X1-a 1 , X2-a 1 , and X3-al of each of these relays constitute a self-holding circuit, and the contacts of each relay X 1- a2, X2-a2, X3-'a2
Select switch PBI, PH2.

A switching circuit is configured to maintain energization after PH1 returns and to block energization to other selection circuits.

(The a contact side of each of these contacts is the energized holding side, and the b
The contact side is used as the energizing contact for other selection circuits.

) Next, each a contact X of each of the above relays X1, X2, X3
1 'a3. X2-a3. Electric motors Ml, M2, M3 for driving the product transport mechanism are arranged between the power supply Eo via X3-a3, and each of the electric motors;
2. Cam switch Ml that opens and closes in conjunction with M3.
-s 1 , M2-s 1 and M3-s 1 are inserted in series between the respective common circuits of the relays Xi, X2 and X3, and the switches M1-s1゜M2-sl, M3
By switching sl, the corresponding electric motors Ml, M2,
The structure is such that M3 can be kept energized.

Therefore, each of these switches Ml-s 1 , M2-s
1, M3-s 1 is usually relay X1, X2
, the circuit on the X3 side is in a closed state (the state shown by the solid line in the figure), and in conjunction with the motor, the motors M1, M2, M3 are operated at a constant rotation angle from a certain point after the motor starts rotating. After the circuit is closed and rotated at a certain rotation angle, the electric motor M1.
Open the circuit on the M2゜M3 side and connect relays X1 and X again.
Close the 2°X3 side circuit.

Note that the time required for the electric motor to drive seven times is the time required for one cycle T of transporting the product.

Further, the electric motors M1, M2, and M3 are provided with cam switches M that establish an operating circuit for the timer relay TR by opening and closing a certain rotation angle from a certain point after the rotation of each type of motor starts.
1-s2, M2-s2, and M3-82 are provided, and are inserted between each of the relays and each product selection switch.

Therefore, each of these switches M1-s2 . M2 s2
゜M3-s2 performs the action of opening, closing, and opening again on the operating circuit of the timer relay TR within one transport period T, and while each of these switches is closed, this timer relay TR is energized (energized)
After a set time has elapsed from the start of energization, the b contact TRb is opened.

When this b contact is opened, the pend relay Rv is forcibly opened. In addition, Rv-a 2 is a self-holding contact of the pendry relay Rv.

The above cam switches Ml-s 1 and M2-s 1 .

M3-sl and Ml-s2, M2-s2, M3-8
The operation timing chart of No. 2 is shown in FIG.

That is, A is Ml-sl..., B is Ml-s
2. In A, the switch closes the relay X1 side in the rising state, and closes the motor M1 side in the other state. In B, the rising state indicates that the switch closes the timer relay TR side, and the other state indicates that the switch closes the relay X1... side. .

Also, the shaded area is the range Z where troubles such as can jams are likely to occur.
This is usually a period of about 1 second after 05 bran after the electric motor M1... is driven and enters the conveying state.

Therefore, the time when timer relay TR is energized must be set before the range Z, and the time when it is de-energized must be set after the range Z.

This is because, as will be described later, since accidents are prevented by the timer relay TR, it is necessary that the operating period of the timer relay TR during normal transportation includes the range Z. If it is not set in this way, for example, This is because if a trouble occurs before the timer relay TR operates, the timer relay TR will not operate, making it impossible to prevent an accident, and the same problem will occur even if a trouble occurs after the timer relay TR has finished operating. .

The present invention has the above-mentioned configuration, and its operation will be explained next. When a coin is inserted into the coin sorting machine in the state shown in Fig. 1, switch 1 is closed and pend relay Rv is energized. , a contact Rv of the relay Rv
Self-maintenance is established via -a2.

Therefore, each product selection switch PBI, PB2-PB3 is energized via the a contact Rv-ai of the pendry relay Rv.

Therefore, the selection switches PB1, PB2.

PB3 is pressed to select one of the switches. If switch PB2 is selected, the current from power source Eo through contact Rv-a1 will flow from contact b of selection switch PB3 to relay X2 via switch PB2→M2-82. will be excited.

Therefore, self-holding is achieved by the a contact X2-al of the relay X2, and by switching the contact X2-a2, the current flow through the contact Rv-a1 is maintained, and when the selection switch PB2 is pressed. Even after release, the excitation of relay X2 is maintained.

At the same time, the a-contact X2-a3 of the relay X2 is closed, and the electric motor M2 for driving the product conveyance mechanism is rotated, and the corresponding product selected by the selection switch PB2 is dispensed, and the motor M2 is rotated. Cam switch M2 that works with M2
-81 switches to the motor M2 side at a specified rotational angle position, and therefore the current supplied to the relay X2 via the switch M2-s1 is cut off, so that the relay X2 self-maintains. is cut off and contact X2-a3 is opened, but since motor M2 is energized via cam switch M2-s1, rotation continues and the motor M2 is turned on before the completion of one cycle T. Cam switch M2- again
81 will return to the relay circuit side, and the motor M2 will stop, completing one cycle of transporting the product. However, a problem occurs during the transport of the product, and the motor M2 is overloaded, so the motor M2 is stopped midway. If it stops at , more than a predetermined amount of time will have elapsed, so cam switch M that works with electric motor M2
2-s After s2 starts, it operates after a predetermined time t has elapsed, and the contact point Rv-al of pendry relay R■→X1-a
2→X2-829 Since the setting time of the timer relay TR, which is energized through the path via M2-52, has exceeded the setting time, the holding circuit of the pend relay Rv is forcibly cut off at the b contact TRb of the timer relay TR. The relay X2 is energized through the contact Rv-al of the relay Rv.
Since the self-holding of the motor M2 is opened and the contact X2-a3 is returned to its original state, the electric motor M2 immediately stops at that point.

At the same time, the power to the timer relay TR is also cut off, so the timer relay TR is restored.

In that case, cam switch M2-82 interlocked with electric motor M2
has been switched to the timer relay TR side, so pressing the selection switch PB2 does not energize relay X2, but other selection circuits and transport motors M1 or M
3 is one that will continue to operate regardless of any failure.

The present invention thus constructed operates a timer relay using a cam switch that is interlocked with an electric motor for transporting goods;
If the conveyance process is not completed within the preset time, the motor drive circuit is forcibly cut off using the contact point of the timer relay. It is possible to prevent accidents caused by the stoppage of the equipment, and even if one or more of the transport parts breaks down, even if the equipment has multiple selective transport parts, other malfunctions can be prevented. It can be used for sale without affecting the conveyance section that is not used.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of the present invention, and FIG. 2 is an operation timing chart of the same. 1...Coin switch, Rv...Pend relay, PBI, PB2, PB3...Product selection switch, XLX2. X3...Relay,
Ml, M2. M3...Electric motor, TR...
・Timer relay.

Claims (1)

[Claims] 1 A pend relay that is self-held by a coin switch and a plurality of product selection switches that are energized through the contacts of the pendry relay, and a relay that is self-held by each selection switch, and each a of the relay. In a vending machine, each of the vending machines is equipped with a plurality of product conveyance electric motors driven through contacts, and a plurality of switches that open the pend relay and one drive circuit of each electric motor in conjunction with the electric motors after one cycle of product conveyance is completed, In conjunction with each of the above electric motors, a switch is provided that opens and closes at a constant rotation angle from a certain point after the motor starts rotating, and is energized while the switch is closed, and after a set time has elapsed from the start of energization, a B contact is provided. A timer relay is provided, and the B contact of the timer relay is inserted between the pend relay holding circuits, and a switch that opens and closes at a constant rotation angle in conjunction with the motor is connected to the motor within one cycle of transporting the product. The setting time of the timer relay is determined so that the timer relay opens, closes, and then opens in conjunction with each other, and the timer relay opens its b contact after the time required for one cycle when the product is transported normally. and a control device for a vending machine, characterized in that the operating period of the timer relay includes a range where transportation troubles are likely to occur.