JP3605817B2 - Vending machine protector - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vending machine protection device having an electric circuit board at a lower portion of a main body .
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a vending machine as disclosed in, for example, Japanese Patent Application Laid-Open No. 64-76193 is often installed outdoors such as at a storefront or along a highway. Therefore, when a disaster such as a flood occurs, the inside of the vending machine is also flooded, and the electric circuit board usually attached to the lower part of the vending machine is also submerged.
[0003]
Therefore, a vending machine according to the related art is provided with an earth leakage breaker. This earth leakage breaker is interposed between the power supply and the electric circuit board, detects that the electric circuit board is submerged and a current flows between the main body, and cuts off the power supply to the vending machine to cause an electric leakage accident. This is to perform an operation to avoid it.
[0004]
[Problems to be solved by the invention]
Here, even if the electric circuit board is submerged, it can be reused if it is dried, but conventionally, power is continuously supplied to the electric circuit board after the submersion until the earth leakage breaker operates. Therefore, the electrical components attached to the board are subject to electrolytic corrosion. When such electrolytic corrosion occurs, there is a problem that the electric circuit board cannot be used even if it is dried.
[0005]
The present invention has been made to solve such a conventional technical problem, and has a simple configuration of a protection device capable of avoiding electrolytic corrosion when an electric circuit board of a vending machine is flooded. It is provided in.
[0006]
[Means for Solving the Problems]
The protection device of the present invention is applied to a vending machine having an electric circuit board on the bottom of the main body, and has a ground fault breaker interposed between the electric circuit board and a power supply, and one input and the other of the ground fault breaker are provided. Of the lead wires, and the leading end of each lead wire is placed at a position lower than the electric circuit board.
[0007]
According to the present invention, when protecting a vending machine provided with an electric circuit board on the bottom of the main body, lead wires are drawn from one input and the other output of an earth leakage breaker interposed between the electric circuit board and a power supply. Since the leading ends of the lead wires are arranged at a position lower than the electric circuit board, when the vending machine is flooded, the leading ends of the lead wires are submerged before the electric circuit board.
[0008]
The earth leakage breaker detects the current flowing between the lead wire and the main body when the lead wire is submerged, and performs a breaking operation, so that the power supply to the electric circuit board is cut off before it is submerged. it can. This makes it possible to avoid electrolytic corrosion of the electrical components on the electric circuit board. In particular, since this is achieved by extracting the lead wire from the earth leakage breaker, the configuration is simple and the cost is minimized.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a vending machine 1 as an embodiment to which the present invention is applied , and FIG. 2 is a perspective side view of a bottom portion of the vending machine 1. The vending machine 1 according to the embodiment includes a box-shaped main body 15 and a door 6 for opening and closing the front surface of the main body 15. The door 6 has a display product 2 and a selection button 4 for the display product 2. A locking device 5, a coin insertion slot 7 for inserting various coins, a return lever 8 for returning coins, a change return opening 9 for returning coins to the purchaser, and a bill insertion slot. , A display 11 for displaying customer information such as the amount of money inserted, change in money, sales, etc., an outlet 12 for taking out sales merchandise, and heating / cooling installed in the lower part of the main body 15 A grill 13 for introducing outside air to the apparatus is provided.
[0010]
On the other hand, a storage for storing sales products (not shown) is formed in the main body 15, and an electric circuit board 18 is mounted on a mounting plate 17 on a base 16 at the lower end of the main body 15. The electric circuit board 18 is provided with a terminal plate for supplying power to the heating / cooling device, and electrical components such as a power supply circuit for supplying power to a circuit element for controlling the temperature and sales of the product.
[0011]
An earth leakage breaker 23 is attached to the main body 15 corresponding to the left rear side of the grill 13, and the earth leakage breaker 23 is provided between a commercial AC power supply (not shown) and the electric circuit board 18. ing.
[0012]
A metal fitting 24 is welded to the mounting plate 17 in front of the electric circuit board 18, and a connector 26 is inserted into the metal fitting 24 from above. Two metal plate terminals (not shown) having a predetermined area are provided in the connector 26 at a distance from each other, and the connector 26 connects each metal plate terminal at a position lower than the electric circuit board 18 by a height H. It is installed with it exposed downward.
[0013]
On the other hand, lead wires 31 and 32 are drawn out from one input (power supply side) and the other output (electric circuit board side) of the earth leakage breaker 23, and each lead wire 31 and 32 is connected to each metal of the connector 26. Each is connected to a plate terminal and is conductive.
[0014]
With the above configuration, when the water level of the place where the vending machine 1 is installed rises due to a flood or the like and the inside of the main body 15 is flooded and the water level rises to the connector 26, both metal plate terminals of the connector 26 are submerged. Since the electric circuit board 18 is higher than the connector 26 by the height H as described above, the electric circuit board 18 is not yet submerged.
[0015]
On the other hand, when the metal plate terminal of the connector 26 is submerged, a very small current of about 15 mA flows between each of the lead wires 31 and 32 and the pedestal 16 of the main body 15. The earth leakage breaker 23 detects such a current and performs a breaking operation (trip) to cut off the power supply to the electric circuit board 18. That is, the power supply to the electric circuit board 18 is cut off before it is submerged, so that the electric erosion of the electric components on the electric circuit board 18 is avoided.
[0016]
In particular, in this case, the lead wires 31 and 32 are pulled out from the earth leakage breaker 23, connected to the existing connector 26, and the connector 26 is simply attached at a position lower than the electric circuit board 18, so that the configuration is simple. Costs are also minimized. In addition, since the metal plate terminal of the connector 26 is used, a sufficient terminal area can be secured, and the operation sensitivity of the earth leakage breaker 23 can be improved .
[0017]
【The invention's effect】
As described above in detail, according to the present invention, when protecting a vending machine provided with an electric circuit board on the bottom of the main body, one input and the other output of an earth leakage breaker interposed between the electric circuit board and the power supply. Since the lead wire is pulled out from the vending machine and the tip of each lead wire is placed at a position lower than the electric circuit board, if the vending machine is flooded, the tip of the lead wire will be submerged before the electric circuit board. .
[0019]
The earth leakage breaker detects the current flowing between the lead wire and the main body when the lead wire is submerged, and performs a breaking operation, so that the power supply to the electric circuit board is cut off before it is submerged. it can. This makes it possible to avoid electrolytic corrosion of the electrical components on the electric circuit board. In particular, since this is achieved by extracting the lead wire from the earth leakage breaker, the configuration is simple and the cost is minimized.
[Brief description of the drawings]
FIG. 1 is a front view of a vending machine as an embodiment to which the present invention is applied .
FIG. 2 is a perspective side view of the bottom of the vending machine of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vending machine 15 Main body 16 Foot 18 Electric circuit board 23 Earth leakage breaker 26 Connectors 31, 32 Lead wire

Claims (1)

In a vending machine equipped with an electric circuit board at the bottom of the main body,
An electric leakage breaker interposed between the electric circuit board and a power supply is provided, and leads are drawn from one input and the other output of the electric leakage breaker, and the ends of the drawn lead wires are lower than the electric circuit board. A vending machine protection device characterized by being arranged at a position.

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