JPS584395B2 - Koukasenbetsusouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coin sorting device that electronically sorts coins.

Conventionally, various types of coin sorting devices have been proposed in which coin passages are configured to mechanically sort coins according to their size, shape, etc.; This was not preferred because it had disadvantages such as the passage becoming extremely complex in structure.

As a device for eliminating such drawbacks, an electronic coin sorting device is known in which a sorting coil that forms an electromagnetic field is placed opposite the coin passage, and the impedance change of the sorting coil that occurs when coins are passed is utilized. ing.

In the sorting system of this type of device, a bridge circuit is constructed using a sorting coil, a standard impedance element to be contrasted with this sorting coil, and two other impedance elements, and the bridge equilibrium point due to passage of coins is Detection methods and frequency change detection methods include a proximity switch method that configures an oscillation circuit using a sorting coil as a resonant element, a method that uses a sorting coil as an oscillation coil to detect changes in oscillation frequency due to passage of coins, and an induced voltage detection method. There is a method in which an oscillating coil and a receiving coil are placed opposite each other with a coin path in between, and a voltage change induced in the receiving coil is detected when a coin passes between the two coils.

However, in both of these sorting methods, a single sorting coil is used to inspect the coin's material, plate thickness, and outer diameter.
Forged coins, such as coins with an abnormal outer diameter or plate thickness, may be determined to be genuine coins.

Especially when dealing with coins of multiple denominations, it is necessary to judge the denomination and authenticity, and if you try to narrow the range of judgment criteria, even genuine coins that have worn out during the distribution process will be considered counterfeit coins. It may be judged or sorted into other denominations.

Therefore, in order to accept genuine coins that have been worn out during the circulation process, the range of judgment criteria must be widened, which increases the probability that counterfeit coins will be accepted as genuine coins, making it difficult to eliminate them. It had drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate these drawbacks of conventional devices and to provide a coin sorting device with an extremely simple structure and high sorting accuracy.

According to the present invention, at least three denominations of 10 yen coins, 50 yen coins, and 100 yen coins are used as test coins, and the coins are sorted based on changes in the magnetic field caused by the test coins passing through an electromagnetic field. At least two first coin sorting sensors and a second coin sorting sensor that form an electromagnetic field are arranged along a coin path, and the size of the first coin sorting sensor is determined based on the size of the first coin sorting sensor among the coins to be tested. The size of the second coin sorting sensor is smaller than the outer diameter of the 50 yen coin with the smallest outer diameter, and the size of the second coin sorting sensor is larger than the outer diameter of the 10 yen coin with the largest outer diameter among the test coins. This is achieved by configuring it as follows.

According to the present invention, the material and outer diameter of the coin are independently inspected by the first coin sorting sensor and the second coin sorting sensor, and the coin is determined by comprehensive judgment based on the inspection output of each coin sorting sensor. Since the authenticity of the coins is determined, it is possible to obtain a coin sorting device with high sorting accuracy.

Next, one embodiment of the present invention will be described in detail based on the drawings.

In one embodiment of the present invention, a coin sorting sensor in which a transmitter coil and a receiver coil are disposed facing each other across a coin passage will be described below.

1, 2, and 3 are schematic diagrams for explaining the principle of the present invention.

In the figure, B denotes a coin passage; for example, if a vending machine has a common coin slot, one coin slot is provided so as to communicate with the coin slot.

C indicates the inserted test coin.

KW is a transmitting coil installed on the wall of coin passage B.
As will be described later, it is excited by a constant alternating current voltage.

A receiving coil HW is arranged on another passage wall of the coin passage B so as to face the transmitting coil KW across the coin passage, and the transmitting coil KW and the receiving coil HW are electromagnetically coupled. .

The transmitting coil KW and receiving coil HW are configured as a coin sorting sensor.

Therefore, as shown in FIG. 2, the output voltage AS of the receiving coil HW has a voltage value E when the test coin C does not pass.

is taken out. For example, when a 10 yen coin passes, the output voltage AS becomes voltage E, when a 50 yen coin passes, the output voltage AS becomes voltage F, and when a 100 yen coin passes, the output voltage AS becomes Voltage G
As such, the output voltage of the receiving coil HW differs depending on the type of passing coin.

In addition, in FIG. 2, T represents time, and time t1-
t2 represents the coin being in transit.

FIG. 3 is a block diagram of the electronic circuit.

Transmitting coil KW and receiving coil HW across coin passage B
are arranged to face each other, and the transmitting coil KW is excited by an alternating current source A of constant voltage.

The receiving coil HW has a comparison circuit for 10 yen coins■1,50
Comparison circuit v2 for yen coins and V3 for 100 yen coins are connected in parallel, and comparison circuit 1 for 10 yen coins has a counting circuit D1 for 10 yen coins, and comparison circuit V2 for 50 yen coins has a counting circuit D1 for 10 yen coins. yen coin counting circuit D2, and 10
Comparison circuit V3 for 0 yen coins includes counting circuit D for 100 yen coins.
2 are connected to each other.

The comparison circuit V1 for the 10 yen coin has the voltage E in FIG.
In order to detect this, a voltage upper limit value 10X and a voltage lower limit value 10Y are set, and the voltage detection width thereof is 10Z.

In the 50 yen coin comparison circuit v2, in order to detect the voltage F, a voltage upper limit value 50X and a voltage lower limit value 50Y are set, and the voltage detection width thereof is 50Z.

In addition, in order to detect the voltage G, the comparison circuit V3 for 100 yen coin has a voltage upper limit value of 100X and a voltage lower limit value of 100X.
Y is set, and its voltage detection width is 100Z.

Next, the operation of this configuration will be explained.

When a coin does not pass through the coin path B, the output voltage AS of the receiving coil HW is the voltage E.

appears, and therefore none of the comparison circuits ■1, ■2, and ■3 operate.

Now, a 10 yen coin is inserted into the coin slot, and the coin passage B1
In other words, when passing between the transmitting coil KW and the receiving coil HW, the output voltage AS of the receiving coil HW becomes the voltage E, so only the comparison circuit V1 for the 10 yen coin operates, and 1
one pulse is sent to the counting circuit D0.

Thus, one 10 yen coin is sorted and counted.

Next, when a 50 yen coin is inserted, the output voltage AS of the receiving coil HW shows the voltage F, so that only the 50 yen coin comparison circuit V2 operates, and one pulse is transferred to the counting circuit D2.
send to

Thus, one 50 yen coin is sorted and counted.

Next, when a 100 yen coin is inserted, the receiving coil H
The output voltage AS of W becomes the voltage G, so that only the 100 yen coin comparison circuit V3 operates, and one pulse is sent to the counting circuit D3.

Thus, one 100 yen coin is sorted and counted.

In this way, the coins inserted are sorted and counted according to their type.

By the way, as shown in FIG. 4, FIG. 4A, and FIG. 4B, the reception coil KW1 as the first coin sorting sensor
and the receiving coil HW1, the transmitting coil KW2 as the second coin sorting sensor, and the receiving coil HW2 are the transmitting coil K
W, , the outer diameter of the receiving coil HW1 is formed smaller than the outer diameter of the smallest diameter coin among at least three types of 10 yen, 50 yen, and 100 yen coins, while the transmitting coil KW2. The outer diameter of the receiving coil HW2 is made larger than the outer diameter of the largest coin among at least three types of coins.

That is, in this embodiment, the diameters of the transmitting coils KW, , and receiving coil HW1 are smaller than the outer diameter of the 50-yen coin C50, and the outer diameters of the transmitting coil KW2 and receiving coil HW2 are smaller than the outer diameter of the 10-yen coin C10. It is also thickly formed.

In addition, in the figure, C100 indicates a 100 yen coin.

Therefore, the areas where the transmitting coil KW1, receiving coil HW1 and the coin face each other are determined by the areas of the transmitting coil KW1 and receiving coil HW, and since each coil KW1, HW is formed smaller than the outer diameter of the coin to be tested, Inspections related to the coin material or plate thickness are performed regardless of the outer diameter.

On the other hand, since the opposing areas of the transmitting coil KW2, receiving coil HW2 and the coin are determined by the area of each coin, these coils KW2 and HW2 are mainly used to inspect the outer diameter of the coin with regard to the thickness and material of the outer diameter of the coin. Let's do it.

If the outer diameters of transmitter coil KW2 and receiver coil HW2 are made larger than the outer diameter of a 10 yen coin, even if there is a coin with a larger diameter than a 10 yen coin, coils KW2 and H
Since the opposing areas of W2 and the coin are different, it is possible to inspect even such a large diameter coin.

FIG. 5 is a circuit diagram of an embodiment of the present invention, in which KW1 and KW2 are connected to receiving coils HW1 and H across a coin path B
This is a transmitting coil placed opposite W2.

The receiving coil HW1 has a comparison circuit for 10 yen coins V11, 5.
A comparison circuit V2 for 0 yen coins and a comparison circuit V3 for 100 yen coins are connected in parallel, and the receiving coil HW2 includes a comparison circuit V12 for 10 yen coins, a comparison circuit V22 for 50 yen coins, and a comparison circuit for 100 yen coins. V32 are connected in parallel.

The comparison circuits v1, , v21 and v31 are set with voltage upper limit values iox1, 50x1 and 100X1 and voltage lower limit values 10Y1, 50Y1 and 100Y1 based on the plate thickness and material of each coin.

On the other hand, the comparator circuits V02, V22 and V32 have voltage upper limit values 10X2 and 50X mainly based on the outer diameter of each coin.
2 and 100X2, and voltage lower limit values 10Y2, 50Y2 and 100Y2 are set.

The comparison circuits V1, , v21, and v31 further include a delay circuit R1.
, R2, and R3 are connected so that the output signal thereof is delayed for a certain period of time.

This delay time is set by taking into consideration the time from when the coin passes through the receiving coil HW1 until it reaches the receiving coil HW2.The output signals of the delay circuits R1, R2, and R3 and the outputs of the comparison circuits V12, v22, and V32 are set. The signals are respectively led to AND circuits AND1, AND2, AND3, and the output signals of AND circuits AND1, AND2, AND3 are 10
Counting circuit for yen coins D1, counting circuit for 50 yen coins D2, 1
It is guided to a counting circuit D3 for 00 yen coins.

Next, the operation shown in FIG. 5 will be briefly explained.

The basic principle is the same as in the case of FIG.

For example, when a 10 yen coin C10 is inserted, the coin C10 is first inspected for thickness and material at the receiving coil HW1, and then inspected for outer diameter at the receiving coil HW2.

Therefore, the comparison circuit ■11, V1.

If the output signal from
An output signal of 1 is transmitted, and the counting circuit D1 performs a 1 counting operation.

Even if the inserted coin has the same outer diameter as a 10 yen coin,
In the case of defective coins with different thicknesses and materials, no output signal is generated from the comparator circuit V11, so an output signal is generated from the AND circuit AND, and therefore, the counting circuit D1 does not perform a counting operation.

This is true even if the plate thickness and material are the same but the outer diameters are different.

In this way, the 100 yen coin C100 and the 50 yen coin C50 are also sorted.

As explained above, in the present invention, when coins are electronically sorted using the output voltage of the receiving coil, two coin sorting sensors of different sizes (dimensions) are used to inspect the material and plate thickness of the coins. Since the inspection of the outer diameter and the outside diameter inspection are carried out separately, coins can be sorted with great precision.

In the above embodiment, a coin sorting sensor having a transmitting coil and a receiving coil was described, but in the coin sorting sensor of the present invention, the magnetic field changes as the coin passes through the electromagnetic field formed by the coin sorting sensor itself. It can be applied to anything that takes advantage of the fact that

[Brief explanation of drawings]

1, 2, and 3 are schematic diagrams for explaining the principle of the present invention; FIGS. 4, 4A, and 4B are explanatory diagrams of one embodiment of the present invention; and FIG. is a block diagram. KW: transmitting coil, HW: receiving coil, ■,,v2,v
3: Comparison O path, D1, D2, D3: Counting circuit.

Claims (1)

[Claims] 1 At least 3 denominations of 10 yen coins and 100 50 yen coins
In a device in which yen coins are used as test coins and sorting is performed based on changes in the magnetic field caused by the test coins passing through an electromagnetic field, at least a first coin sorting sensor and a second coin sorting sensor that form an electromagnetic field. is arranged along the coin path, the outer diameter of the first coin sorting sensor is smaller than the outer diameter of a 50 yen coin having the smallest outer diameter among the test coins, and the second coin sorting sensor is A coin sorting device characterized in that the outer diameter is larger than the outer diameter of a 10 yen coin having the largest outer diameter among the test coins.