JPH05298519A - Coin processor - Google Patents

Abstract

PURPOSE:To detect a coin of composite material formed by piling plural thin pieces with different materials with high accuracy by using information including information depending on the internal material of the coin and also including information depending on the surface material of the coin. CONSTITUTION:The first reception coil 10b-1 and the second reception coil 10b-2 of a material detection sensor 10 are connected in series, and they are connected to an amplifier detection circuit 40-1 via a parallel resonance capacitor 41. The amplifier detection circuit 40-1 extracts by amplifying and detecting the envelope of a signal generated in the series circuit of the first reception coil 10b-1 and the second reception coil 10b-2 of the material detection sensor 10. Since the first reception coil 10b-1 and the second reception coil 10b-2 receive both a magnetic field passing the coin and the one reflected on the surface of the coin, the output of them include both the information of the internal material and the surface material of the coin. Thereby, it is possible to detect the coin of composite material with high accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coin processing device used for various service equipment such as a vending machine and a money changer, and in particular, a coin which is improved in sorting processing performance of coins and can be downsized. Regarding a processing device.

[0002]

2. Description of the Related Art As a coin processing device for electronically selecting and processing coins, for example, one described in US Pat. No. 3,870,137 is known. This US Pat. No. 3,870,13
The device described in No. 7 has a coil disposed on one side of a coin passage and forms an oscillation circuit including the coil, and an oscillation frequency of the oscillation circuit generated when a coin to be tested passes through the coin passage. The coin is discriminated based on the transition.

That is, this device causes an oscillation frequency shift in the oscillation circuit by utilizing the fact that the inductance of the coil changes as the coin passes near the coil. Is to be selected.

By the way, in such a configuration, the information that affects the oscillation frequency shift amount differs depending on the set frequency of the oscillator. For example, when the frequency of the oscillator is set low, the oscillation frequency change amount is affected by the material inside the coin, and changes. On the contrary, when the oscillator frequency is set high, the oscillation frequency change amount of the coin surface changes. It changes mainly depending on the material.

Here, when the coins to be tested are coins made of the same material both inside and on the surface, the coins can be sorted by one coil by appropriately setting the set frequency of the oscillator. For example, 10 in the United States
When a clad coin (hereinafter referred to as a composite material coin) formed by stacking a plurality of thin pieces of different materials, such as a cent, a 25 cent, and a dollar coin, is a coin to be inspected, the coin is selected by one coil. Will be very difficult to do.

Therefore, the above-mentioned US Pat. No. 3,870,137.
In the device described in No. 3, the plurality of coils are arranged along the coin passage, and a plurality of oscillation circuits including the coils are provided, and the oscillation frequencies of the oscillation circuits are made different from each other. Allows discrimination of material coins.

However, according to such a structure, it is necessary to dispose a plurality of coils along the coin passage, and the distance between the coils must be a predetermined distance in order to eliminate the influence of their interaction. Since the length of the coin passage required for coin detection is considerably longer as a result,
The mechanical size of the entire coin processing device becomes large, which is a major obstacle to miniaturization of the coin processing device.

Further, in the apparatus described in the above-mentioned US Pat. No. 3,870,137, the coin passage is constructed so as to be inclined toward the coil arrangement wall side by a predetermined angle with respect to the vertical direction. This is to keep the relationship between the coil and the coin under test passing through the coin passage constant when detecting coins, and with such a configuration, the coin slides in contact with one side wall of the coin passage and moves in the coin passage. Since it will pass, the relationship between the coil and the coin to be tested passing through the coin passage is always guaranteed to be constant. And the structure which inclines this coin passage to the coil installation wall side is one essential requirement of this device. For example,
In the configuration of this device, when the coin passage is configured vertically, the distance between the passing coin and the coil changes depending on the position where the coin passes in the coin passage, which changes the oscillation frequency shift amount of the oscillation circuit, It becomes impossible to make an accurate determination.

However, if the coin passage is inclined,
Since the coin passes through the coin passage in a state of sliding contact with one side wall of the coin passage, there is a problem that if the input coin is wet, it is likely to cause a coin jam.
Furthermore, foreign matter such as dust easily accumulates on the side wall, and when foreign matter accumulates, the magnetic coupling relationship between the coil and the input coin changes, and the phenomenon that the output is different even for coins of the same material occurs Is deteriorated or malfunctions. Further, if the coin passage is tilted, the mechanical size required for the entire coin processing device also becomes large.

As a coin processing device having another structure, an oscillating coil excited by a signal of a predetermined frequency is arranged on one side of the coin passage and a receiving coil is arranged on the other side. A configuration is also known in which a coin passing through the coin passage is discriminated based on the level of the output voltage of the coin.

However, even in such a structure, the obtained information differs depending on the frequency of the signal exciting the oscillation coil. That is, in the case of this configuration, a change in the magnetic field received by the receiving coil within the magnetic field generated from the oscillating coil due to the coin passing between the oscillating coil and the receiving coil, that is, between the oscillating coil and the receiving coil. The coin is discriminated by utilizing the change of the mutual coupling coefficient, but in this case, the change amount of the mutual coupling coefficient between the oscillation coil and the receiving coil differs depending on the frequency of the signal exciting the oscillation coil.

This is based on the phenomenon that a low-frequency magnetic field penetrates into the coin, but a high-frequency magnetic field penetrates only to the surface of the coin. For example, the frequency of the signal exciting the oscillation coil is set low. Then, the output of the receiving coil changes mainly due to the influence of the material inside the coin, and when the frequency of the signal that excites the oscillation coil is set high, the output of the receiving coil mainly depends on the material of the surface of the coin. Change depending on.

Therefore, even in this configuration, when it is necessary to discriminate a composite material coin formed by stacking a plurality of thin pieces of different materials, such as a US 10 cent, 25 cent, and 1 dollar coin, for example, It is very difficult to sort coins with one coil. Therefore, a plurality of oscillating coils excited by signals of different frequencies are arranged along the coin passage, and the coin passages are sandwiched between them. A plurality of receiving coils are arranged so as to face the oscillation coils, and coins are discriminated based on the outputs of the plurality of receiving coils.

However, also in the case of this configuration, it is necessary to dispose a plurality of oscillation coils and reception coils along the coin passage, and therefore the length of the coin passage required for coin detection becomes considerably long. As a result, the mechanical size of the entire coin processing device for selecting coins increases.

Also in this device, if the coin passage is constructed vertically, the detection output changes depending on the position of the coin passing through the coin passage, so that a considerably large variation occurs in the output signal and the accuracy of the coin discrimination is improved. There is a problem of decrease.

[0016]

As described above, in the above-mentioned conventional apparatus, in the United States, 10 cents, 25 cents, and 1 cent.
In order to enable discrimination of composite material coins such as dollar coins that are formed by stacking multiple thin pieces of different materials, a plurality of coils with different operating frequencies for the coins are arranged along the coin passage. In addition, a plurality of signal processing circuits for processing the outputs of these coils are required, which causes a problem that the structure becomes very complicated and the device becomes large.

Further, in order to improve the accuracy of discriminating coins, it is indispensable to incline the coin passage toward the coil side. In this case, if the inserted coins are wet, it is easy to cause coin jams. In addition, there is a problem, and foreign matter such as dust easily accumulates on the side wall. When foreign matter accumulates, the magnetic coupling relationship between the coil and the input coin changes, and the phenomenon that the same material is different occurs. There is a problem of deterioration and malfunction, and a problem that the mechanical size required for the entire coin processing device becomes large.

Therefore, according to the present invention, it is possible to detect with high accuracy a composite material coin formed by stacking a plurality of thin pieces made of different materials, and the coin passage can be constructed vertically.
Moreover, it is an object of the present invention to provide a coin processing device which is excellent in coin selection processing performance and whose mechanical size can be reduced.

[0019]

In order to achieve the above object, the present invention is directed to a first receiving coil disposed in a coin passage, and to face the first receiving coil with the coin passage interposed therebetween. A second receiving coil disposed and a first oscillating coil which is disposed coaxially with the first receiving coil in a stacked manner on the first receiving coil and which is excited and driven by an excitation signal of a predetermined frequency. A second oscillating coil that is disposed coaxially with the second receiving coil in a stacked manner on the second receiving coil and that is excited and driven by an excitation signal of a predetermined frequency;
It is characterized by further comprising a discriminating means for discriminating a coin passing through the coin passage based on the added output of the first receiving coil and the second receiving coil.

[0020]

A part of the magnetic field generated from the first oscillating coil passes through the coin passing through the coin passage and is received by the second receiving coil, and the other part of the magnetic field passing through the coin passage. The light is reflected by the surface and received by the first receiving coil. Further, a part of the magnetic field generated from the second oscillation coil passes through the coin passing through the coin passage and is received by the first receiving coil, and the other part of the magnetic field passes through the coin passage. Is received by the second receiving coil. Then, the outputs of the first receiving coil and the second receiving coil are added, and based on the added output, the discrimination means
Discrimination of coins passing through the coin passage is performed. Here, since the first receiving coil and the second receiving coil receive both the magnetic field passing through the coin and the magnetic field reflected on the surface of the coin, the output of the first receiving coil and the second receiving coil are received. The output of the receiving coil contains information that depends on the material inside the coin and information that depends on the material on the surface of the coin. The accuracy can be detected. Further, since the respective coils are arranged at mutually symmetrical positions with respect to the coin passage, by adding the output of the first receiving coil and the output of the second receiving coil, the coin can pass anywhere in the coin passage. However, the error is canceled out, so that the coin passage can be constructed vertically without deteriorating the discrimination accuracy of coins.

[0021]

FIG. 1 is a block diagram showing a control system of an embodiment of a coin processing device according to the present invention. Figure 1
In the embodiment shown in FIG. 2, coin discrimination control for discriminating the type of coins to be inserted based on the outputs of the material detection sensor 10 and the diameter detection sensor 20, the discriminated coin denomination and the overflow sensors 86-1, 86-2. , 86-3 corresponding to the output of the drive circuit 80-1 and the drive circuit 80-2 via the drive circuit 80-1.
-2 is driven to control the coin distribution control for distributing the inserted coins, and based on the output of the passage sensor 84, the amount SK of the inserted coins.
Is calculated, and when the amount SK of the inserted coin becomes equal to or higher than the selling price SP of the product set by the price setting switch 82 (SK ≧ SP), the sales control signal SE is generated from the terminal T1 and the sales requiring change. If the change is made, referring to the outputs of the empty sensors 85-1, 85-2, 85-3, the change-out solenoids 88-1, 88 via the drive circuits 81-1, 81-2, 81-3. -2, 88-3, change control for paying out the required change, inventory control for executing a predetermined inventory operation based on the output of the inventory switch 83, input of the coin acceptance prohibition signal IH from the terminal T2 The control unit 70 including one microprocessor executes the coin acceptance prohibition control that executes the acceptance prohibition process of the input coins when the coins are present.

FIG. 2 shows the overall structure of the coin processing device of this embodiment. The sectional structure of the section AA is shown in FIG. 3, and the sectional structure of the section BB is shown in FIG. .. First, the schematic configuration of the coin processing device of this embodiment will be described with reference to FIGS. In FIG. 2, a coin slot 1 is provided above the main body 100 of the coin processing device, and coins 2 inserted from the coin slot 1 are inclined in a direction away from the coin slot 1. It falls on Le3.
The coin 2 dropped on the first rail 3 rolls along the first rail 3 and drops on the downstream side. This first rail 3
A material detection sensor 10 and a diameter detection sensor 20 are arranged in the middle of the process, and the coin 2 is discriminated based on the outputs of the material detection sensor 10 and the diameter detection sensor 20. The detailed configurations of the material detection sensor 10 and the diameter detection sensor 20 and the coin discrimination processing will be described in detail later.

In FIG. 3, a genuine / counterfeit coin distribution solenoid 87 is provided.
-1 indicates that the coin 2 inserted by the coin discrimination process is
It is driven according to whether it is a true coin or a false coin. A state in which the genuine / counterfeit coin sorting solenoid 87-1 is connected to the plunger 872 of the genuine / counterfeit coin sorting solenoid 87-1 via the arm 873, and the genuine / counterfeit coin sorting solenoid 87-1 is not driven. , The elastic force of the spring 871 causes the arm 87
3 rotates in a clockwise direction around the fulcrum 874, and the true / false coin distribution gate G1 reaches the position shown by the solid line in FIG. 3, and in this state, the inserted coins are guided to the false coin passage 6. When the true / false coin distribution solenoid 87-1 is driven, the plunger 87 is
2 is drawn into the genuine / counterfeit coin distribution solenoid 87-1, whereby the arm 873 rotates counterclockwise about the fulcrum 874, and the genuine / counterfeit coin distribution gate G1 is broken line in FIG. The coins are inserted into the true coin passage side, that is, the true coin passage 4 or 5 in this state. That is, when the input coin is a false coin, the genuine / counterfeit distribution solenoid 87-1 is not driven, and the genuine / counterfeit distribution gate G1 has advanced to the genuine coin passage 4 side, so It is guided to the passage 6 side and discharged from a discharge port (not shown). If the inserted coin is a true coin, the true / false coin distribution solenoid 87-1 is driven, and the true / false coin distribution gate G1 which has been advanced to the true coin passage 4 side in the standby state is withdrawn. The true coin is guided to the true coin passage 4 or 5.

By the way, in this embodiment, four kinds of coins A, B, C, D are used coins. Among these four kinds of coins A, B, C, D, coins A, B, C are change coins. 2 for use as coin tubes 8-1, 8 shown in FIG.
-2 and 8-3 respectively, and since coin D is not used as change, it is directly guided to a safe not shown.

The coins guided to the true coin passage side are driven by a denomination sort solenoid 87-2 to group two coins A, B and C used as change and a coin D not used as change. It is divided into Money sort solenoid 87
-2 plunger 876 is connected to the denomination distribution gate G2 via the arm 877, and the spring 87 is provided when the denomination distribution solenoid 87-2 is not driven.
By the elastic force of 5, the arm 877 rotates counterclockwise about the fulcrum 879, and the denomination sort gate G2 comes to the position shown by the solid line in FIG. Sort gate G
The coins assigned to the true coin passage side by 1 are the true coin passage 5
Be led to. When the denomination distribution solenoid 87-2 is driven, the plunger 876 causes the denomination distribution solenoid 87 to move.
-2, whereby the arm 877 rotates clockwise around the fulcrum 879, and the denomination sort gate G
2 is the position shown by the broken line in FIG. 3, and in this state, the coins distributed to the true coin passage side by the true / false coin distribution gate G1 are guided to the true coin passage 4 side. That is, when the input coins are coins A, B, C, the denomination sorting solenoid 87-2 is driven, the denomination sorting gate G2 closes the true coin passage 5, and the coins A, B, C are true coins. It is guided through the passage 4 onto the second rail 7 shown in FIG. When the input coin is coin D, the denomination sorting solenoid 87-2 is not driven, the denomination sorting gate G2 closes the true coin passage 4, and the coin D passes through the true coin passage 5 downward. Not held in safe. For coins A, B and C, coin tubes 8-1 and 8-
2, 8-3 overflow sensor is overflow sensor 86-
If detected by 1, 86-2, 86-3,
The denomination sort solenoid 87-2 is not driven, and is guided to the safe side, like the denomination D.

Coins A, B, C guided on the second rail 7.
Are coin tubes 8-1, depending on the diameter of the coin,
8-2 and 8-3 are allotted to each coin
It is reserved in the bus 8-1, 8-2, 8-3. Here, details of the coin distribution configuration based on the diameter of the coin are not shown, but this distribution can be performed using a known mechanical distribution mechanism.

In FIG. 4, a change payout solenoid 88-
3 is provided corresponding to the coin tube 8-3, and the plunger 88 of this change dispensing solenoid 88-3.
A pin 882a is provided at the tip of the pin 2
a is engaged with a hole 884a which is provided at one end of the arm 884 and which is released, and a payout slide 885 is connected to the other end 884b of the arm 884. The payout slide 885 is formed with a hole 885a for dropping coins in the coin tube 8-3, and is configured so that the lower end of the coin tube 8-3 is closed by the tip portion 885a thereof in the standby state. .. Change-out solenoid 8
When 8-3 is driven, the plunger 882 is retracted into the change dispensing solenoid 88-3, which causes the arm 8 to move.
84 rotates clockwise around the fulcrum 883, whereby the payout slide 885 moves to the left in FIG. 4, and one coin in the coin tube 8-3 enters the hole 885a of the payout slide 885. To fall. afterwards,
When the arm 884 pivots counterclockwise about the fulcrum 883 by the elastic force of the spring 881 arranged on the plunger 882, and the payout slide 885 returns to the standby position, the inside of the hole 885a of the payout slide 885. The coin drops downward through the hole 9a formed in the bottom plate 9. The coins dropped below are guided to a coin return port (not shown). That is, in this embodiment, the coin tube 8 is operated by the one-stroke operation of the change dispensing solenoid 88-3.
Coins in -3 are paid out one by one to the coin return slot. Then, by repeating this operation, a desired number of coins can be paid out.

Further, an empty sensor 85-3 for detecting that the number of coins in the coin tube 8-3 is below a certain number is provided below the coin tube 8-3, and the coin tube 8-3 is provided. An overflow sensor 86-3 for detecting that the number of coins in the coin tube 8-3 has exceeded a predetermined number is provided on the upper part of the. Well-known optical sensors can be used as the empty sensor 85-3 and the overflow sensor 86-3.

Incidentally, in FIG. 4, the coin tube 8-
Although the coin payout mechanism corresponding to No. 3 is shown, as shown in FIG. 1, a similar coin payout mechanism is provided corresponding to the coin tubes 8-1 and 8-2, and the empty sensor 85-1, 85-2 and overflow sensor 86-
1, 86-2 are provided.

In FIG. 1, the selling price setting switch 82
Is a switch for setting a selling price SP of a product sold by an automatic vending machine employing this coin processing device. The selling price SP set by the selling price setting switch 82 is used for a selling process described in detail later.
Here, the selling price setting switch 82 may have a known configuration including a plurality of dip switches.

The inventory switch 8 shown in FIG.
3-1, 83-2, 83-3 are coin tubes 8-
It is operated when the coins held in 1, 8-2, 8-3 are forcibly discharged. For example, when the inventory switch 83-1 is operated, it corresponds to the coin tube 8-1. The change-out solenoid 88-1 provided therein is driven to forcibly dispense all the coins in the coin tube 8-1 one by one to the coin return port. Similarly, the coin tube 8-2 is operated by operating the inventory switch 83-2.
All coins in the coin can be forcibly paid out to the coin return port, and all coins in the coin tube 8-3 can be forcibly paid out to the coin return port by operating the inventory switch 83-3. it can.

Next, the detailed structure of the material detection sensor 10 shown in FIG. 1 will be described.

FIG. 5 shows the material detection sensor 10 shown in FIG.
This shows the detailed structure of the material detection sensor 10
The coins are arranged along the coin passage formed on the first rail 3 shown in FIG. On the first rail 3, a first side wall 3a and a second side wall 3b which are formed substantially vertically are formed,
The first rail 3 and the first and second side walls 3a and 3
A coin passage is formed by b. And the first side wall 3
The first receiving coil 10b-1 is provided at a, and the second receiving coil 10b-2 is provided at the second side wall 3b. In addition, the first receiving coil 10b-1 is coaxial with the first receiving coil 10b-1.
The first oscillating coil 10a-1 is disposed on the side wall 3a side of the first receiving coil 10b-1 so as to be stacked on the first receiving coil 10b-1, and the second side wall is coaxial with the second receiving coil 10b-2. The second oscillation coil 10a-2 is arranged on the 3a side so as to be stacked on the second reception coil 10b-2.

Here, the first receiving coil 10b-1 is
As shown in the front view of FIG. 7A and the CC cross-sectional view of FIG. 7B, the core having the cylindrical hole 11a formed in the center portion
11 and bobbin 12, and coil 1 is attached to bobbin 12.
0b-1 is wound to form a pot-shaped coil.

The first oscillating coil 10a-1 has a central axis shown in FIG. 7 as shown in a front view of FIG. 8 (a) and a DD sectional view of FIG. 8 (b). The drum-shaped coil has a structure in which a coil 15 is wound around a core 14 having a protrusion 14a that fits in the same cylindrical hole 11a at the center of the pot-shaped coil shown.

Then, in the same cylindrical hole 11a of the first receiving coil 10b-1 of the pot type coil structure shown in FIG.
The first oscillation coil 10a having the drum coil structure shown in FIG.
-1 projection 14a is fitted, and as shown in FIG. 6, the first oscillating coil 10a-on the first receiving coil 10b-1.
They are arranged on the first side wall 3a shown in FIG.

Although detailed structures of the second receiving coil 10b-2 and the second oscillating coil 10a-2 are not shown, the above-mentioned first receiving coil 10b-1 and the first oscillating coil 10a-1 are not shown. It has the same structure and is similarly arranged on the second side wall 3b shown in FIG.

Next, the detailed structure of the diameter detection sensor 20 will be described.

FIG. 9 shows a detailed structure of the diameter detection sensor 20 shown in FIG. This diameter detection sensor 20 is
The coin passage formed on the first rail 3 is disposed downstream of the material detection sensor 10. The diameter detecting sensor 20 includes a first oscillating coil 20a-1 and a second oscillating coil 20a-2, which are arranged on the side of the first side wall 3a forming a coin passage.
And a first receiving coil 20b-1 and a second receiving coil 20 disposed on the second side wall 3b side so as to face the first oscillating coil 20a-1 and the second oscillating coil 20a-2.
b-2. Here, the first oscillation coil 20
The a-1 and the second oscillating coil 20a-2 are arranged so as to be displaced by a predetermined distance in order to facilitate the discrimination of the diameter of the coin to be tested.

Here, the first oscillating coil 20a-1 is
FIG. 10 (a) is a front view, and FIG. 10 (b) is its EE.
As shown in the cross-sectional view, the core 21 is composed of a drum coil having a structure in which a coil 22 is wound. The second oscillation coil 20a-2 and the first and second receiving coils 2
Although details of 0b-1 and 20b-2 are not shown, they have the same configuration as the first oscillation coil 20a-1 shown in FIG.

FIG. 11 shows the first oscillating coil 20a-1 and the first receiving coil 20 which constitute the diameter detecting sensor 20.
b-1 shows the positional relationship between the second oscillating coil 20a-2 and the second receiving coil 20b-2 based on the relationship between the coins 2a and 2b to be tested. Here, the coin 2a to be inspected
Indicates the maximum diameter coin that can be used.
b shows the coin with the smallest diameter among the usable coins. That is, the first oscillating coil 20a-1 and the first receiving coil 20b-1 of the diameter detecting sensor 20 are the coins 2a having the largest diameter.
The second oscillation coil 20a at a position suitable for detecting
-2 and the second receiving coil 20b-2 are arranged at positions suitable for detecting the coin 2b having the smallest diameter, and are displaced from the first rail 3 by a predetermined distance. Here, the receiving coil 2
0b-1 and 20b-2 are connected in series as described later, and the output voltage obtained from the series circuit is the coin 2 under test.
The output voltage decreases (the attenuation rate increases) in proportion to the increase in the outer diameter of the coin, and the output voltage corresponds to the outer diameter of the coin 2 to be tested.

Now, as shown in FIG. 1, the first oscillating coil 10a-1 and the second oscillating coil 10a-2 of the material detection sensor 10 are connected in series, connected to the excitation drive circuit 30, and have a diameter. First oscillating coil 2 of detection sensor 20
0a-1 and the second oscillation coil 20a-2 are connected in series and are connected to the excitation drive circuit 30.

The excitation drive circuit 30 is applied with an AC signal of, for example, about 20 to 60 KHz obtained by dividing the reference pulse signal output from the control unit 70 by the frequency dividing circuit 50. Therefore, the first oscillation coil 10 of the material detection sensor 10
a-1, the second oscillation coil 10a-2, and the first oscillation coil 20a-1 and the second oscillation coil 20a-2 of the diameter detection sensor 20 are respectively separated from the excitation drive circuit 30 by approximately 2
An alternating current excitation signal having the same frequency of 0 to 60 KHz is applied, and each excitation drive is performed. The AC signal of about 20 to 60 Hz divided by the frequency dividing circuit 50 may be generated and taken out inside the control unit 70.

As the excitation signal, not only a sine wave but also a square wave, a triangular wave or the like may be used.

First receiving coil 1 of the material detection sensor 10
0b-1 and the 2nd receiving coil 10b-2 are connected in series, and are connected to the amplification detection circuit 40-1 via the parallel resonance capacitor 41.

The first receiving coil 20b-1 and the second receiving coil 20b-2 of the diameter detection sensor 20 are connected in series and are connected to the amplification detection circuit 40-2 via the parallel resonance capacitor 42. It

The amplification detection circuit 40-1 amplifies and detects the signal generated in the series circuit of the first reception coil 10b-1 and the second reception coil 10b-2 of the material detection sensor 10 and detects the envelope. Extract.

Further, the amplification detection circuit 40-2 performs amplification detection of the signal generated in the series circuit of the first reception coil 20b-1 and the second reception coil 20b-2 of the diameter detection sensor 20 and envelopes the signal. Extract the line.

FIG. 12 shows an example of signals generated in the series circuit of the first receiving coil 10b-1 and the second receiving coil 10b-2 of the material detecting sensor 10 when the coin passes. Then, the output waveform of the amplification detection circuit 40-1 obtained by amplifying and detecting this is as shown in FIG. Figure 1
3, the voltage V is the voltage when the coin 2 to be inspected does not exist in the material detection sensor 10, and the voltage ΔV represents the amount of voltage attenuation accompanying the passage of the coin 2 to be inspected. Here, the amount of voltage attenuation ΔV changes according to the type of coin. The first receiving coil 10b-1 and the second receiving coil 10b-1 of the material detection sensor 10
Also in the signal waveform generated in the series circuit of the receiving coil 10b-2 and the output waveform of the amplification detection circuit 40-2, the voltage V and the voltage attenuation amount ΔV when the coin 2 to be detected does not exist in the material detection sensor 10 are Although different, FIG. 12 and FIG.
It becomes almost the same as the waveform shown in. In this case, the voltage attenuation amount ΔV corresponds to the coin diameter.

The output of the amplification detection circuit 40-1 is added to the coin detection circuit 63, the standby voltage hold circuit 60-1, and the peak voltage hold circuit 61-1 and the amplification detection circuit 40-
The output of 2 is applied to the coin detection circuit 63, the standby voltage hold circuit 60-2, the peak voltage hold circuit 61-2, and the determination start signal generation circuit 62.

The output of the standby voltage hold circuit 60-1 and the output of the peak voltage hold circuit 61-1 are window comparator circuits 64-1, 64-2, 6 respectively.
4-3 and 64-4, and the output of the standby voltage hold circuit 60-2 and the peak voltage hold circuit 61.
-2 output is also the window comparator circuit 64-
1, 64-2, 64-3, 64-4.

Here, the standby voltage hold circuit 60-1
Is for holding the output of the amplification detection circuit 40-1 when there is no coin in the material detection sensor 10, that is, the voltage V shown in FIG.

The peak voltage hold circuit 61-1 is also provided.
Holds the attenuation peak value of the output of the amplification detection circuit 40-1 generated when a coin passes through the material detection sensor 10, that is, the voltage corresponding to the voltage attenuation amount ΔV shown in FIG.

Further, the standby voltage hold circuit 61-2 is
Amplification detection circuit 4 when there is no coin in the diameter detection sensor 20
The output of 0-2, that is, the voltage corresponding to the voltage V shown in FIG. 13 is held.

The peak voltage hold circuit 60-2 is also provided.
Holds the attenuation peak value of the output of the amplification detection circuit 40-2 caused by the passage of coins in the diameter detection sensor 20, that is, the voltage corresponding to the voltage attenuation amount ΔV shown in FIG.

The coin detection circuit 63 is an amplification detection circuit 40-
1 has dropped to a predetermined level, that is, there is a coin in the material detection sensor 10, and when the output of the amplification detection circuit 40-2 has dropped to a predetermined level, that is, there is a coin in the diameter detection sensor 20. At this time, a signal is output and this is added to the control unit 70.

Wind comparator circuits 64-1 and 64
-2, 64-3, and 64-4 have window threshold values corresponding to the materials and diameters of coins A, B, C, and D, respectively, and the peak value of the inserted coins is the window threshold value corresponding to the material. When it enters inside and enters the window threshold value corresponding to the diameter, the discrimination signals corresponding to coins A, B, C and D are generated. Here, the coins A, B, C, and D correspond to, for example, US 5 cent coin, 10 cent coin, 25 cent coin, and 1 dollar coin. In addition, the window comparator circuits 64-1 and 64
The window thresholds respectively corresponding to the materials and diameters of -2, 64-3, and 64-4 change corresponding to the outputs of the standby voltage hold circuit 60-1 and the standby voltage hold circuit 60-2.

This window comparator circuit 64-1,
As the circuits 64-2, 64-3, and 64-4, for example, the circuit 64 shown in FIG. 14 can be used. This circuit 64 is a window comparator circuit 64-1, 64-2, 64-
No. 3, 64-4, and is configured by including four comparators CO1, CO2, CO3, and CO4, and the first window threshold value and peak voltage hold circuit 61 corresponding to the material by the comparators CO1 and CO2. -1
Of the comparators CO3 and CO, forming a first window comparator for comparing the output of the
4 forms a second window comparator for comparing the second window threshold value corresponding to the diameter with the output of the peak voltage hold circuit 61-2, that is, the voltage VB. here,
The first window threshold value is the resistance R11, R12 and the variable resistance R
13 is set by the variable resistor R13, and its relative value changes according to the output of the standby voltage hold circuit 60-1, that is, the voltage VREF1. The window threshold is resistance R21, R22
And the second window threshold can be adjusted by the variable resistor R23, and its relative value changes according to the output of the standby voltage hold circuit 60-2, that is, the voltage VREF2. The voltage divided by the resistors R11 and R12 and the variable resistor R13 is applied to the positive input of the comparator CO1, and the voltage divided by the resistors R11 and R12 and the variable resistor R13 is detected by the comparator CO1.
2 is applied to the negative input of the comparator 2, and the output of the peak voltage hold circuit 61-1, that is, the voltage VA, is applied to the comparator CO.
The negative input of 1 and the positive input of comparator CO2. The voltage divided by the resistors R21 and R22 and the variable resistor R23 is applied to the plus input of the comparator CO3, and the resistors R21 and R22 and the variable resistor R23 are added.
The voltage divided by is applied to the negative input of the comparator CO4, and the output of the peak voltage hold circuit 61-2, that is, the voltage VB is applied to the negative input of the comparator CO3 and the positive input of the comparator CO4. Further, the comparators CO1, CO2, CO3, CO
4 is pulled up by a resistor R0.

Therefore, a high level signal is output from the output VOUT only when the voltage VA falls within the range of the first threshold and the voltage VB falls within the range of the second threshold. In other cases, the signal of the output VOUT becomes low level. Here, the first threshold value and the second threshold value are the window comparator circuits 64-1, 64-2,
64-3 and 64-4, coins A, B, and
Since the threshold for discriminating the material of C and D and the threshold for discriminating the diameter are set, the wind comparator
In the output circuits 64-1, 64-2, 64-3, and 64-4, the output of the peak voltage hold circuit 61-1 falls within the threshold for determining the material, and the peak voltage hold circuit 61-2 outputs When the output falls within the threshold for discriminating the diameter, discrimination outputs corresponding to coins A, B, C, D are generated. This window comparator circuit 64-1, 64-
Discrimination outputs of 2, 64-3 and 64-4 are added to the control unit 70.

The determination start signal generating circuit 62 includes an output of the amplification detecting circuit 40-2 and a peak voltage holding circuit 61-.
2 is added, the output of the amplification detection circuit 40-2 is reduced, and when the output of the peak voltage hold circuit 61-2 corresponds to the peak value, a determination start signal is generated, and this determination is performed. A start signal is applied to the control unit 70.

After receiving the judgment start signal from the judgment start signal generating circuit 62, the control section 70 takes in the judgment outputs of the window comparator circuits 64-1, 64-2, 64-3, 64-4 and inputs them. Determine the type of coin. Here, the determination start signal generating circuit 62 includes the amplification detection circuit 40.
-2 output and the output of the peak voltage hold circuit 61-2 are input, and a determination start signal is generated when the output of the peak voltage hold circuit 61-2 corresponds to the peak value. Therefore, although the output of the peak voltage hold circuit 61-1 is not observed, the diameter detection sensor 20 is disposed on the downstream side of the material detection sensor 10 as described above, and therefore the peak voltage hold circuit 61-2 is not provided. When the output corresponds to the peak value, the output of the peak voltage hold circuit 61-1 should correspond to the peak value, and the peak voltage hold circuit 61-
It is enough to look at the output of 2. Here, the determination start signal may be generated based on both the peak voltage hold circuits 61-1 and 61-2.

The control unit 70 executes a predetermined process based on each input signal according to a procedure stored in advance in a read-only memory (ROM) (not shown) in the control unit 70. That is, the control unit 70 checks the discrimination outputs of the window comparator circuits 64-1, 64-2, 64-3, 64-4 based on the discrimination start signal output from the discrimination start signal generating circuit 62. If any of the discrimination outputs is output, it is determined to be a genuine coin. In this case, the genuine / counterfeit coin sorting solenoid 87-1 is driven through the drive circuit 80-1 to switch the genuine / counterfeit coin sorting gate G1 to the position shown by the broken line in FIG. To the side, that is, the true coin passage 4 or 5.

When the denomination of the inserted coin is any one of coins A, B and C, the denomination sorting solenoid 87-2 is driven through the drive circuit 80-2 and is shown by a broken line in FIG. The denomination sort gate G2 is switched to the position, and the coins A, B, and C are guided through the true coin passage 4 onto the second rail 7 shown in FIG.

The control unit 70 further monitors the output signal of the passage sensor 84, and when a coin determined to be a true coin is detected by the passage sensor 84 within a predetermined time, the control unit (not shown) indicates the amount of money of the denomination. 70 random access memory (RA
Temporarily store in M).

When the temporarily stored amount SK becomes equal to or higher than the selling price SP set by the price setting switch 82 (SK ≧ SP), the sales start signal SE is output from the terminal T1.
Is output for a predetermined time.

When the control section 70 determines that the change is required after outputting the sales start signal SE from the terminal T1 for a predetermined time, based on the calculation result in the control section 70, the empty sensor 85- The drive circuits 81-1, 81-2, 81-3 are referred to by referring to the outputs of 1, 85-2, 85-3.
Change-out solenoids 88-1, 88-2, 88 via
Drive -3 to pay out the necessary change.

The control unit 70 also controls the inventory switch 83 (inventory switches 83-1 and 8-8 shown in FIG. 2).
3-2, 83-3), and when an output is generated from the inventory switch 83, the change-out solenoid 88-1 is correspondingly sent via the drive circuits 81-1, 81-2, 81-3. , 88-2, 88-3 are driven to execute an inventory operation for forcibly ejecting the coins held in the coin tubes 8-1, 8-2, 8-3.

Further, the control unit 70 executes the coin acceptance prohibition processing for prohibiting acceptance of all the inserted coins when the coin acceptance prohibition signal IH is inputted from the terminal T2.

15 and 16 are flowcharts showing the processing executed by the control unit 70.

Next, the operation of the control unit 70 will be described with reference to this flow chart.

First, when the power of the apparatus is turned on, the control unit 70 makes a predetermined initial setting inside the control unit 70 (step 101). After this, the coin processing device 10 of this embodiment
An error check is performed to see if the circuit inside 0 is operating normally (step 102), and then the price setting switch 82.
The selling price SP set in step 3 is stored in the register R0 (not shown) in the control unit 70 (step 103).

The control unit 70 stores the selling price SP set by the price setting switch 82 in the register R0, and then, the overflow sensor 86-disposed in the coin tubes 8-1, 8-2, 8-3. Check the outputs of 1, 86-2, 86-3, and overflow coin tubes 8-1, 8
-2, 8-3 are checked for overflow (step 104), and then the coin tube 8-
Empty sensors 85 arranged at 1, 8-2 and 8-3
Check the output of -1,85-2,85-3,
A change presence / absence check is performed to determine whether change is present in each of the blocks 8-1, 8-2, and 8-3 (step 105).

The control unit 70 then checks whether the inventory switch 83 is turned on (step 10
6) If the inventory switch 83 is turned on,
Drive the change dispensing solenoids 88-1, 88-2, 88-3 via the drive circuits 81-1, 81-2, 81-3,
A coin payout process for forcibly discharging the coins held in the corresponding coin tubes 8-1, 8-2, 8-3 is executed (step 111), and the process returns to step 102. When it is determined in step 106 that the inventory switch 83 is not turned on, the output of the coin detecting circuit 63 is monitored, and it is determined based on the output of the coin detecting circuit 63 whether or not a coin is inserted (step 107). ). Here, if the coin is not inserted, the process returns to step 102, and if it is determined that the coin is inserted, then the control unit 70 checks whether or not the coin acceptance prohibition signal IH is input from the terminal T2 (step 108). ). Here, the coin acceptance prohibition signal IH is applied to the terminal T2, for example, when the acceptance of coins is prohibited due to the vending machine side running out of products.

If it is determined in step 108 that the coin acceptance prohibition signal IH is input, the process returns to step 102. In this case, the true / false coin distribution solenoid 87-1 is not driven, the true / false coin distribution gate G1 remains switched to the position shown by the solid line in FIG. It is discharged from a discharge port (not shown). That is, acceptance of input coins is prohibited.

If it is determined in step 108 that the coin acceptance prohibition signal IH is not input, the T1 timer start processing is executed (step 109), and then the determination start signal generation circuit 62 determines. It is checked whether the start signal is input, that is, whether the determination is started (step 11).
0). Here, if it is determined that the determination has not started, T
It is checked whether one timer has timed out, that is, T1 (step 112), and if not, step 108.
Return to. If it is determined in step 110 that the determination has started, the process proceeds to the true coin determination process (step 113).

That is, when the determination start signal is input from the determination start signal generating circuit 62 within the time T1 after the T1 timer is started, the true coin determination process (step 11).
3), the determination start signal generating circuit 6 within the time T1.
If the judgment start signal is not input from step 2, step 1
In step 12, it is determined to be T1, and in this case it is determined that an abnormality has occurred and the process returns to step 102.

The true coin determination process (step 113) is performed by the window comparator circuits 64-1, 64-2, 64-3,
It is performed based on the output of 64-4. That is, the window comparator circuits 64-1, 64-2, 64-3, 64-
When a coin discriminating signal is output from any of the four, the denomination of the inserted coin is determined as the denomination corresponding to the window comparator circuit having the output, and the window comparator circuits 64-1 and 64- When the coin discrimination signal is not output from any of 2, 64-3 and 64-4, it is determined that the inserted coin is a false coin. If it is determined that the inserted coin is a false coin, the process returns to step 102 by a processing procedure (not shown). In this case, the true / false coin distribution solenoid 87-
No. 1 is not driven, the true / false coin distribution gate G1 remains switched to the position shown by the solid line in FIG. 3, and the input coins are discharged from the discharge port (not shown) through the false coin passage 6.

When the true coin determination process in step 113 is completed, it is determined whether or not the change can be covered by the coins held in the coin tubes 8-1, 8-2 and 8-3 (step 11).
4). Whether or not the change can be covered is determined based on the total amount of denominations accepted as genuine coins, the selling price SP set in step 103, and the result of the change presence / absence check performed in step 105.

If it is determined in step 114 that the change cannot be covered, the process returns to step 102.

However, if it is determined in step 114 that the change can be covered, then, based on the true coin determination processing result of step 113 and the overflow check result of step 104, the inserted coin is the D denomination corresponding to the coin D or It is determined whether the coin denomination is an overflow denomination corresponding to the coin tube that is over (step 115). Here, when the input coin is the D denomination or the over denomination, only the genuine / counterfeit coin allocating solenoid 87-1 is driven via the drive circuit 80-1 (step 116), and the input coin is converted to the genuine coin. When the coins introduced into the passage 5 are not the D denomination or the over denomination, the true / false coin distribution solenoid 87-1 and the denomination distribution solenoid 87- are connected via the drive circuit 80-1 and the drive circuit 80-2. 2 is driven (step 117) to guide the inserted coin into the true coin passage 4. Here, the coins introduced into the true coin passage 5 are held in a safe not shown, and the coins introduced into the true coin passage 4 are introduced onto the second rail 7 shown in FIG. 2, depending on the diameter of the coin. Coin tubes 8-1, 8-2, 8-
It is divided into 3 coin coin tubes 8-1 and 8 respectively.
-2, 8-3.

After executing the processing of step 116 or step 117, the control section 70 executes the processing of determining whether the passage sensor 84 is on (step 118). Here, if it is determined that the passage sensor 84 is on, a process of storing the input amount of money in the register R1 (not shown) of the control unit 70 is executed (step 119). However, here the passage sensor 8
If it is determined that No. 4 is not on, the start processing of the T2 timer is executed (step 124), then it is checked whether or not the T2 timer is time over, that is, T2 (step 125). If it is not T2, Return to step 118.

That is, if the passage sensor 84 is turned on within the time T2 after the timer T2 is started, the process proceeds to step 119 to execute the processing of storing the amount of money to be paid into the register R1. Within passage sensor 8
If No. 4 is not turned on, it is determined to be T2 in step 125. In this case, the inserted coin is determined to be a false coin, a predetermined false coin process (step 126) is executed, and then the process returns to step 102.

In step 119, the amount of money to be input is registered in the register R.
When the process of storing in 1 is executed, next, whether or not the input amount SK stored in the register R1 is larger than or equal to the selling price SP stored in the register R0, that is, whether the sales condition SP ≦ SK is satisfied. The determination process of is executed (step 120). If SP ≦ SK is satisfied, a sales signal output process of outputting a sales start signal SE from the terminal T1 is executed (step 121). However, step 12
If SP ≦ SK is not satisfied at 0, it is determined that the sales condition is not satisfied, and the process returns to step 102.

After executing the sales signal output process in step 121, the control section 70 then executes a process of determining whether or not the change requires change (step 12).
2). This judgment is based on the selling price SP and the input amount SK
Depending on whether SP <SK, SP <SK
In the case of, the change payout process (step 123) is executed, and S
If P = SK, the change payout process (step 123) is not executed and the process ends.

The change payout process (step 123) is performed by driving the change payout solenoids 88-1, 88-2, 88-3 via the drive circuits 81-1, 81-2, 81-3.

Next, the principle of coin discrimination of the material detection sensor 10 used in this embodiment will be further described.

FIG. 17 shows the principle of discriminating coins by the material detection sensor 10. In FIG. 17, the coin to be detected 2 is placed in the coin passage formed by the first side wall 3a and the second side wall 3b.
In the state before being turned on, the oscillation coil 10a-1
Excitation lines 401 and 402 emitted from the receiving coil 10
The magnetic force lines 403 and 404 received by b-1 and emitted from the oscillation coil 10a-2 are received by the receiving coil 10b-2. Consider a case where the coin 2 to be inspected is inserted into the coin passage in this state. The magnetic force lines 401 and 402 emitted from the oscillation coil 10a-1 and reaching the coin 2 to be tested reach the receiving coil 10b-1 bent by the coin 2 to be tested. Similarly, the magnetic force lines 403 and 404 emitted from the oscillation coil 10a-2 and reaching the coin 2 to be tested are bent by the coin 2 to be tested and reach the receiving coil 10b-2. Further, some of the magnetic force lines 401 and 402 reaching the coin 2 to be inspected penetrate the coin 2 to be inspected to reach the receiving coil 10b-2 as magnetic force lines 405 and 406, and the magnetic force line 403 to reach the coin 2 to be inspected. , 404 partially passes through the coin 2 to be tested and reaches the receiving coil 10b-1 as magnetic force lines 407 and 408.

Due to such a phenomenon, the output voltages of the receiving coil 10b-1 and the receiving coil 10b-2 change depending on the materials of the shallow portion and the deep portion of the coin 2 to be inspected, and the output voltage of the shallow portion and the deep portion of the coin 2 to be inspected are changed. It will include information corresponding to the material.

Therefore, according to the structure of the material detecting sensor 10 of this embodiment, instead of the clad coin in which a thin piece of white copper is laminated on a copper core material like a US 10 cent, 25 cent, and 1 dollar coin, for example. Even when a copper substitute coin having the same outer shape and the same thickness as this clad coin is inserted, it can be easily identified. That is, according to the material detection sensor 10 of this embodiment, there is a clear difference between the above-mentioned clad coin and a simple copper substitute coin, which clearly separates the clad coin and the simple copper substitute coin. It becomes possible to select separately.

By the way, the material detection sensor 1 of this embodiment
The zero oscillation coils 10a-1 and 10a-2 and the reception coils 10b-1 and 10b-2 are arranged so as to face the first side wall 3a and the second side wall 3b forming the coin passage. Therefore, the coin 2 to be inspected is
Even if it passes to one of the side walls 3b, the sum of the induced voltages of the receiving coils 10b-1 and 10b-2 is always within a certain range if the same denomination is used.

That is, even if the coin 2 to be inspected passes one side of the first side wall 3a and the attenuation amount of the induced voltage of the receiving coil 10b-1 is larger than that when the coin passes through the passage center, in this case, one of the other side is passed. Since the amount of attenuation of the induced voltage in the receiving coil 10b-2 is reduced by that amount, the sum of the amounts of attenuation becomes constant. Therefore, no matter which side wall the coin 2 to be inspected passes, it is possible to obtain an accurate detection voltage according to the denomination.

The measuring principle will be further described with reference to FIGS. 18 to 21.

Receiving coil 10b-of the material detection sensor 10
1 and the output voltage of the receiving coil 10b-2 change according to the distance to the coin 2 to be tested.

That is, as shown in FIG. 5, the coin 2 to be inspected is exactly in the middle of the coin passage formed by the first side wall 3a and the second side wall 3b (the receiving coil 10b-1 for the coin 2 to be inspected and the receiving coil 10b-1. When the respective distances of the coils 10b-2 are equal), the receiving coil 10b
−1 and the output voltage of the receiving coil 10b-2 become equal.

However, in the vertically constructed coin passage, the coin 2 to be inspected does not always pass exactly in the middle of the coin passage, but is passed toward the first side wall 3a side or the second side wall 3b side. In some cases. Here, FIG. 18 shows the case where the coin 2 to be inspected has passed near the first side wall 3a, and FIG. 19 shows the case where the coin 2 to be inspected has passed near the side of the second side wall 3b.

Now, consider the case where the coin 2 to be inspected passes near the first side wall 3a side as shown in FIG. 18, and as shown in FIG. The synthetic attenuation rate obtained in the series circuit of the receiving coil 10b-1 and the receiving coil 10b-2 when the coin 2 does not exist is set to 0 (%), and the above when the coin 2 to be tested passes through the inside of the material detection sensor 10. The combined attenuation factor obtained in the series circuit is p
(%). Here, the coin 2 to be inspected is the material detection sensor 1
Each receiving coil 10b-1 when passing through 0
Looking at the attenuation rate obtained in the receiving coil 10b-2, the receiving coil 10b-1 comes close to the coin 2 to be inspected, so that the attenuation rate becomes q (%), and the receiving coil 10b-
2 is the coin 2 to be inspected, the attenuation rate is r (%)
Becomes Here, the receiving coil 10b-1 and the receiving coil 1
There is a relation of q + r = p between the combined attenuation rate p obtained in the series circuit of 0b-2 and the attenuation rates q and r of the receiving coil 10b-1 and the receiving coil 10b-2.

Further, as shown in FIG. 19, considering the case where the coin 2 to be inspected passes near the second side wall 3b,
As shown in FIG. 3, the receiving coil 10 in this case is the receiving coil 10 when the coin 2 to be inspected does not exist in the material detection sensor 10.
The synthetic attenuation rate obtained in the series circuit of b-1 and the receiving coil 10b-2 is 0 (%), and the synthetic attenuation rate obtained in the series circuit when the coin 2 to be tested passes through the inside of the material detection sensor 10. p '(%). Here, looking at the attenuation rates obtained in the receiving coil 10b-1 and the receiving coil 10b-2 when the coin 2 to be inspected passes through the material detection sensor 10, the receiving coil 10b-1 shows that the coin 2 to be inspected , The attenuation rate becomes q '(%), and the coin 2 to be inspected approaches the receiving coil 10b-2, and the attenuation rate becomes r' (%). Here, the combined attenuation rate p obtained in the series circuit of the receiving coil 10b-1 and the receiving coil 10b-2.
'Between the attenuation factors q'and r'of the receiving coil 10b-1 and the receiving coil 10b-2, respectively, q' + r '= p'.
Have a relationship.

However, when the position where the coin 2 to be tested passes is deviated from the center of the coin passage to the receiving coil 10b-1 side or the receiving coil 10b-2 side, the receiving coil 10
The changing directions of the output voltage of b-1 and the output voltage of the receiving coil 10b-2 are opposite to each other, and the changing amounts are equal to each other.

Therefore, the relationship of q + r = q '+ r' p = p 'is established.

That is, in this embodiment, the receiving coil 10b-1 and the receiving coil 10b-2 of the material detection sensor 10 are connected in series as shown in FIG. Coil 10
By taking out the added output of the output voltage of b-2, it is possible to cancel the influence of the displacement of the coin 2 to be tested in the coin passage.

According to the structure of this embodiment, it is not necessary to incline the coin passage in order to allow the inserted coin to pass along one of the coin passage walls, and in principle, the coin passage of the portion for material selection can be provided. Can be vertical. By making the coin passage vertical, foreign matters such as dust are prevented from accumulating, and even when the inserted coin is wet, it does not stop midway.

Further, since it is sufficient to dispose only the coils of both the material detection sensor 10 and the diameter detection sensor 20 on the first rail 3, the length of the first rail 3 is greatly shortened. can do.

Further, the material detection sensor 1 according to this embodiment
The frequency at which 0 is excited depends on the material detection sensor 10
Is always constant, whether or not it is active.

FIG. 22 shows the material detection sensor 1 of this embodiment.
0 shows an example of the resonance characteristic when the coin 2 to be inspected is not present in the material detection sensor 10 and the resonance characteristic when the coin 2 to be inspected is present in the material detection sensor 10. 22, the horizontal axis represents frequency and the vertical axis represents its resonance voltage. Graph 200 shows the resonance characteristics when the coin 2 to be tested is not present in the material detection sensor 10, and graph 300 shows the material. The resonance characteristic when the coin 2 to be tested is present in the detection sensor 10 is shown. As is clear from FIG. 22, when there is no coin 2 to be inspected in the material detection sensor 10, the resonance voltage becomes maximum at the frequency f0a, and when there is coin 2 to be inspected in the material detection sensor 10, the resonance voltage becomes It becomes the maximum at the frequency f1a which is changed by Δfa from the frequency f0a. Here, in this embodiment, the frequency for exciting the material detection sensor 10 is always constant whether or not the coin 2 to be inspected is acting on the material detection sensor 10. Δ
The material of the coin is determined based on Va. On the other hand, for example, in the device described in U.S. Pat. No. 3,870,137, the oscillation circuit is formed by including the coil disposed on one side of the coin passage, so that the oscillation frequency of the coil in the standby state, that is, Even if the excitation frequency is F, this frequency F changes by ΔF as the inductance of the coil itself changes due to the passage of coins,
As a result, the excitation frequency becomes F '. In this case, the material of the coin is determined based on the voltage ΔVa ′ corresponding to the changed frequency F ′. Here, as is clear from FIG. 22, the relationship of ΔVa> ΔVa ′ is established. Therefore, according to the configuration of this embodiment, the coins to be inspected can be highly accurately compared with the device described in US Pat. No. 3,870,137. The material of No. 2 can be discriminated.

FIG. 23 shows the resonance characteristics of the material detection sensor 10 and the diameter detection sensor 20 in this embodiment in comparison between the case where there is no coin in the sensor and the case where there is no coin. Here, the graph 201 of FIG. 23A shows the resonance characteristic when the coin 2 to be tested is not present in the material detection sensor 10,
A graph 301 shows a resonance characteristic when the coin 2 to be tested is present in the material detection sensor 10. Further, a graph 202 of FIG. 23B shows a resonance characteristic when the coin 2 to be inspected is not present in the diameter detection sensor 20, and a graph 302 shows a resonance characteristic when the coin 2 to be inspected is present in the diameter detection sensor 20. Show. FIG. 23 (a)
As is clear from the above, when there is no coin 2 to be detected in the material detection sensor 10, the resonance voltage becomes maximum at the frequency f0a, and when there is coin 2 to be detected in the material detection sensor 10, the resonance voltage is the frequency f0a. Frequency f1 changed from Δfa
Maximum at a. Here, in this embodiment, the frequency at which the material detection sensor 10 is excited is always the constant frequency F, so the material of the coin is determined based on the voltage ΔVa corresponding to this frequency F. Further, as is clear from FIG. 23 (b), when there is no coin 2 to be detected in the diameter detection sensor 20, the resonance voltage becomes maximum at the frequency f0b, and when there is coin 2 to be detected in the diameter detection sensor 20. Becomes maximum at the frequency f1b in which the resonance voltage changes by Δfb from the frequency f0b. Here, in this embodiment, the diameter detection sensor 2
Since the frequency for exciting 0 is always a constant frequency F,
The diameter of the coin will be determined based on the voltage ΔVb corresponding to the frequency F.

[0106]

As described above, according to the present invention,
It is possible to provide a coin processing device that has a simple configuration, can be downsized, and can sort coins with high accuracy. Further, it is possible to make the coin passage vertical without tilting, and it is possible to prevent foreign matter such as dust and wet coins from coming into close contact with the coin passage wall and stopping, thereby enabling stable coin selection. Play.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control system of an embodiment of a coin processing device according to the present invention.

FIG. 2 is a front view showing the overall configuration of the coin processing device of this embodiment.

3 is an AA cross-sectional view showing a cross-sectional configuration of an AA part of the coin processing device shown in FIG.

4 is a BB cross-sectional view showing a cross-sectional configuration of a BB portion of the coin processing device shown in FIG.

5 is a cross-sectional view showing a detailed structure of the material detection sensor shown in FIG.

6 is a cross-sectional view showing the main parts of the material detection sensor shown in FIG.

7A and 7B are a front view and a CC cross-sectional view of a receiving coil which constitutes the material detection sensor shown in FIG.

8A and 8B are a front view and a DD cross-sectional view of an oscillation coil that constitutes the material detection sensor illustrated in FIG.

9 is a cross-sectional view showing the detailed structure of the diameter detection sensor shown in FIG.

10 is a front view of each coil constituting the diameter detection sensor shown in FIG. 9 and a sectional view taken along line EE thereof.

FIG. 11 is a schematic diagram illustrating a positional relationship of coils that form the diameter detection sensor illustrated in FIG. 9.

12 is a waveform chart showing an example of an output signal of the material detection sensor shown in FIG.

FIG. 13 is a waveform diagram showing an example of the output signal of the amplification detection circuit shown in FIG. 1.

14 is a circuit diagram showing a detailed configuration of the window comparator circuit shown in FIG.

15 is a flowchart for explaining the operation of the control unit shown in FIG. 1, which is an integrated flowchart with the flowchart shown in FIG.

16 is a flow chart for explaining the operation of the control unit shown in FIG. 1, which is a flow chart integrated with the flow chart shown in FIG.

FIG. 17 is a view for explaining the coin discriminating principle of the material detection sensor shown in FIG. 1.

FIG. 18 is a view for explaining the coin discriminating principle of the material detection sensor shown in FIG. 1, showing a case where the coin to be inspected passes near the first side wall side.

FIG. 19 is a diagram for explaining the coin discriminating principle of the material detection sensor shown in FIG. 1, showing a case where the coin to be inspected passes near the second side wall side.

FIG. 20 is a diagram for explaining the principle of discriminating coins of the material detection sensor shown in FIG. 1, and is a diagram for explaining the output when the coin to be tested passes near the first side wall side.

21 is a diagram for explaining the principle of discriminating coins of the material detection sensor shown in FIG. 1, and is a diagram for explaining the output when the coin to be tested passes near the second side wall.

22 is a diagram for explaining the coin discrimination principle of the material detection sensor shown in FIG. 1, and is a graph for explaining the resonance characteristic of the material detection sensor.

23 is a diagram for explaining the coin discrimination principle of the material detection sensor and the diameter detection sensor shown in FIG. 1, and a graph for explaining the resonance characteristics of the material detection sensor and the diameter detection sensor.

[Explanation of symbols]

1 coin slot 2 coins to be tested 3 first rail 4, 5 true coin passage 6 counterfeit coin passage 7 second rail 8-1, 8-2, 8-3 coin tube 10 material detection sensor 10a- 1 1st oscillation coil 10a-2 2nd oscillation coil 10b-1 1st receiving coil 10b-2 2nd receiving coil 20 Diameter detection sensor 30 Excitation drive circuit 40-1, 40-2 Amplification detection circuit 50 minutes Circulation circuit 60-1, 60-2 Standby voltage hold circuit 61-1, 61-2 Peak voltage hold circuit 62 Judgment start signal generation circuit 63 Coin detection circuit 64-1, 64-2, 64-3, 64-4 window Comparator circuit 70 Control unit 80-1, 80-2, 81-1, 81-2, 81-3
Drive circuit 82 Price setting switch 83 Inventory switch 84 Passage sensor 85-1, 85-2, 85-3 Empty sensor 86-1, 86-2, 86-3 Overflow sensor 87-1 True / false currency distribution solenoid 87-2 Money sort solenoid 88-1, 88-2, 88-3 Change payout solenoid G1 True / counterfeit money sort gate G2 Money sort sort gate

Claims (10)

[Claims] 1. A first receiving coil arranged in a coin passage, a second receiving coil arranged opposite to the first receiving coil with the coin passage interposed therebetween, and the first receiving coil. A first oscillating coil which is disposed coaxially with the receiving coil and stacked on the first receiving coil and which is excited and driven by an exciting signal of a predetermined frequency; and a second oscillating coil which is coaxial with the second receiving coil. A second oscillating coil, which is stacked on the receiving coil and is excited and driven by an exciting signal of a predetermined frequency, and passes through the coin passage based on the added output of the first receiving coil and the second receiving coil. A coin processing device comprising: a discriminating unit for discriminating a coin. 2. The first oscillating coil and the second oscillating coil are connected in series, and the first oscillating coil and the second oscillating coil are excited and driven by a single exciting means. The coin processing device according to claim 1, wherein the coin processing device is a coin processing device. 3. The first receiving coil and the second receiving coil are connected in series, and the discriminating means is a coin based on an output of a series circuit of the first receiving coil and the second receiving coil. The coin processing device according to claim 1, wherein the coin processing device determines whether 4. The amplifying detection circuit for amplifying and detecting the output of the series circuit, the standby voltage holding circuit for holding the output voltage of the amplification detection circuit in a standby state, and the coin passage of the amplification detection circuit. A peak voltage holding circuit for holding the peak voltage of the output voltage at the time, and a window corresponding to each coin denomination are set, and the window changes based on the output of the standby voltage holding circuit. A plurality of window circuits that generate a coin discriminating output when the output enters the window, and discriminate coins passing through the coin passage based on the coin discriminating outputs of the plurality of window circuits. The coin processing device according to claim 3. 5. A third oscillating coil which is disposed in the coin passage and is excited by an excitation signal of a predetermined frequency, and a third oscillating coil which is disposed so as to be displaced from the third oscillating coil by a predetermined distance and which has a predetermined frequency. 4 driven by the excitation signal of
Oscillator coil, a third receiving coil arranged to face the third oscillating coil across the coin passage, and a third receiving coil arranged to face the fourth oscillating coil across the coin passage. And a diameter discriminating means for discriminating the diameter of the coin passing through the coin passage based on the added output of the third receiving coil and the fourth receiving coil. 2. The coin processing according to claim 1, wherein the means discriminates a coin passing through the coin passage based on a combined output of the first receiving coil and the second receiving coil and a discrimination result of the diameter discriminating means. apparatus. 6. The third oscillating coil and the fourth oscillating coil are connected in series, and the third oscillating coil and the fourth oscillating coil are excited and driven by a single exciting means. The coin processing device according to claim 5, which is characterized in that. 7. The third receiving coil and the fourth receiving coil are connected in series, and the diameter discriminating means is based on an output of a series circuit of the third receiving coil and the fourth receiving coil. The coin processing device according to claim 5, wherein the diameter of the coin is determined. 8. The diameter discriminating means, an amplification detection circuit for amplifying and detecting the output of the series circuit, a standby voltage holding circuit for holding an output voltage of the amplification detection circuit during standby, and a coin of the amplification detection circuit. A peak voltage holding circuit that holds the peak voltage of the output voltage when passing and a window corresponding to each coin denomination are set, and the window changes based on the output of the standby voltage holding circuit. A plurality of window circuits that generate a coin diameter discrimination output when the output of the coin enters the window, and discriminates the diameter of the coin passing through the coin passage based on the coin diameter discrimination outputs of the plurality of window circuits. The coin processing device according to claim 7, wherein: 9. The first oscillating coil and the second oscillating coil are connected in series, the third oscillating coil and the fourth oscillating coil are connected in series, and the first oscillating coil is connected. A series circuit of a coil and the second oscillation coil, a series circuit of the third oscillation coil and the fourth oscillation coil are connected in parallel, and the first oscillation coil, the second oscillation coil, and the second oscillation coil The coin processing device according to claim 5, wherein the third oscillating coil and the fourth oscillating coil are driven to be excited by a single exciting means. 10. A first receiving coil arranged in a coin passage, and a first receiving coil connected in series to the first receiving coil and arranged so as to face the first receiving coil with the coin passage interposed therebetween. A second receiving coil, a first oscillating coil stacked on the first receiving coil coaxially with the first receiving coil, and connected in series to the first oscillating coil, A second oscillating coil that is disposed coaxially with the second receiving coil and is stacked on the second receiving coil; and a second oscillation coil that is disposed downstream of the first receiving coil placement position in the coin passage. A third oscillating coil, a fourth oscillating coil which is arranged at a predetermined distance from the third oscillating coil, and a third oscillating coil which faces the third oscillating coil with the coin passage interposed therebetween. A third receiving coil, and the fourth receiving coil sandwiching the coin passage. A fourth receiving coil arranged to face the vibration coil; an exciting signal of a predetermined frequency for the first oscillating coil, the second oscillating coil, the third oscillating coil and the fourth oscillating coil. Excitation means for exciting and driving, a first amplification detection circuit for amplifying and detecting the output of the series circuit of the first oscillation coil and the second oscillation coil, the third oscillation coil and the fourth oscillation A second amplification detection circuit for amplifying and detecting the output of the coil series circuit; a first standby voltage holding circuit for holding the output voltage of the first amplification detection circuit during standby; and a second amplification detection circuit A second standby voltage holding circuit that holds an output voltage during standby of the first amplification voltage detection circuit; a first peak voltage holding circuit that holds a peak voltage of the output voltage during passage of coins of the first amplification detection circuit; Amplification detection A second peak voltage holding circuit for holding the peak voltage of the output voltage when passing coins on the road, a first window corresponding to the material of the coin and a second window corresponding to the diameter, respectively. The first window changes based on the output of the first standby voltage holding circuit, the second window changes based on the output of the second standby voltage holding circuit, and the output of the first peak voltage holding circuit. A plurality of window circuits corresponding to denominations of coins that generate a coin discriminating output when is in the first window and the output of the second peak voltage holding circuit is in the second window. A determination start signal generating means for generating a determination start signal after the output of the second peak voltage holding circuit is confirmed; and coins of the plurality of window circuits after the determination start signal is generated from the determination start signal generating means. Take the discrimination output and use it as the coin discrimination output A coin processing device comprising: a discriminating unit for discriminating a coin passing through the coin passage based on the coin discriminating device.