JP2003051043A - Coin sorter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily exclude the forged coin of foreign currency or the like by highly accurately detecting not only he thickness of coin but also ruggedness on the surface of the coin with a thickness sensor in an electronic coin sorter in which a plurality of sensors are arranged along a coin path and the genuineness/spuriousness of a coin is decided from signal waveforms provided with these sensors when the relevant coin passes the sensors. SOLUTION: A pot core S30P is configured by an outer wall 303 and two magnetic pole parts 301A and 301B in the form of rectangular column. The almost rectangular magnetic pole faces 302A and 302B constitute end faces and the long sides of the rectangles of the magnetic pole faces and are arranged in parallel to each other. The two magnetic pole faces are excited by integrated coils 305a and 305b or coils 305c and 305d so that two magnetic pole faces have mutually different polarities. A thickness sensor S30 is constituted by arranging two pot cores S30P on both sides of a coin path 2 so that the two magnetic poles of the pot core on one side face the two magnetic poles of the pot core on the opposite side with the same polarities and the long sides of the rectangles of the magnetic pole faces are orthogonal to the advancing direction of coins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on an automatic vending machine or the like, and is provided with a coin sorting sensor along a passage of inserted coins, and passes through a coin passage based on the output of the coin sorting sensor. The present invention relates to an electronic coin sorter for discriminating the authenticity of coins, and more particularly to a coin sorter with improved ability to detect irregularities on the surface of coins.

In the following drawings, the same reference numerals indicate the same or corresponding parts.

[0003]

2. Description of the Related Art FIG. 9 shows a simplified principle structure of a sensor portion of an electronic coin sorter of this type. The coin 3 inserted from the coin slot 1 rolls in the coin passage 2 and its characteristic is detected by a coin selection sensor S including a selection coil provided along the coin passage 2 as described later.

The coin sorting sensor S has coils housed in a pair of pot cores (pot-shaped cores) each having an E-shaped cross section, and the opening faces of the pair of pot cores face each other on the wall surface of the coin passage. Thus, the coins are arranged so that the opening surface can face the surface of the coin, and the coins pass through the gap where the opening surfaces face each other. Also, the pair of coils are connected to each other to form one selection coil.

The peak value of the characteristic value detected by the coin sorting sensor S is compared with the upper limit value and the lower limit value of a predetermined money type, and the detected characteristic value is between the upper limit value and the lower limit value. If there is a seed, the coin is determined to be a genuine coin of that denomination, and the other coins are determined to be false coins. Then, the sorting gate 4 is driven based on this determination result so that the true coins are sorted and stored in the true coin passage 5 and the false coins are sorted and returned in the return passage 6.

FIG. 10 is a block circuit diagram showing an example of the configuration of a series of circuits for determining whether a coin inserted is true or false by the coin sorting sensor S of FIG. 9, and FIG. 11 shows the operation of FIG. 10 obtained from the coin sorting sensor. It is a characteristic view demonstrated with the waveform data of a coin characteristic. In FIG. 10, the coin sorting sensor S, the inductance L, the resistors R1 and R2 constitute a bridge circuit 10, and an oscillator OSC is connected as a power source of the bridge circuit 10.

The detection voltage of the bridge circuit 10 is connected to the differential amplifier circuit 11, and the output voltage thereof is the rectification circuit 12,
It is converted into the detection characteristic value A of a digital value through the A / D converter 13 and input to the difference calculation circuit 14. The other input terminal of the difference calculation circuit is provided with the center value M of the coin type of coins output from the center value memory 17 in order to correct the variation for each coin sorting device, and the difference calculation circuit 14 detects it. Absolute value of difference of each gold type obtained by subtracting each central value M from the characteristic value |
A−M | is output and input to the comparison circuit 15.

To the other input terminal of the comparison circuit 15, the tolerance N for each denomination output from the tolerance memory 18 is given, and the comparison circuit 15 uses the absolute value | AM of the difference for each denomination.
Are sequentially compared with the permissible amounts N for the corresponding denominations, and | AM− ≦ N, that is, (MN) ≦ A ≦
When (M + N), a logic "1" is output, and | AM->
In the case of N, "0" is output and input to the determination circuit 16.

FIG. 11A shows a change over time in the output value (detection characteristic value) A of the A / D converter 13 when a coin 3 is inserted into the coin passage 2 (FIG. 9) (that is, a coin sorting sensor). The waveform data of the coin characteristics obtained from S) is shown in FIG.
The changes over time in the output CP of the comparison circuit 15 corresponding to the country (A) are shown. Here, as shown in (A) of the same figure, the true coin determination is made between (M−N) and (M + N) for denominations having a peak value of the detection characteristic value A when the coin 3 passes through the coin sorting sensor S. When there is a gap, it is determined as a true coin of the denomination as shown in FIG. That is, in this example, the determination circuit 1
When a pulse that becomes “1” only once in 6 is input from the comparison circuit 15, it is determined as a true coin.

As the above-mentioned tolerance N, an alternative to this is
Upper limit width N with respect to the central value M for each denomination_HAnd the lower limit width N
_LIt may be specified separately for and. In this case, (M-
N_L) ≦ A ≦ (M + N_H), The output of the comparison circuit 15 is
It becomes "1" and A <(M-N _L) Or (M + N_H) <
When it is A, it becomes “0”. Figure 7 shows a conventional coin sorting machine
An example of the arrangement of the coin sorting sensor in the table is shown. That is, a coin
The material sensor S1 and the outer diameter
A sensor S2 and a plate thickness sensor S3 are provided.
A circuit similar to that shown in FIG. 10 is provided for each of the sensors S1 to S3.
Therefore, each sensor S1 to S3 corresponds to the sensor in FIG.
Installed in the same circuit as 0 instead of coin sorting sensor S
It is rare.

The peak value of the coin characteristic waveform data (that is, the output of the A / D converter 13) obtained through the material sensor S1, the outer diameter sensor S2, and the plate thickness sensor S3 is used as the material of the coin. , The outer diameter and the plate thickness are detected, and the peak value of each of the detected characteristic values is within a predetermined range corresponding to a coin of a certain denomination, as in the case of the coin sorting sensor S. , It was determined to be a genuine coin of that denomination.

Note that FIG. 8 particularly shows the plate thickness sensor S3 of FIG.
3 is a perspective view showing one of the paired pot cores S3P sandwiching the coin passage 2, 31 is a cylindrical magnetic pole portion forming a part of the pot core S3P which is integrally formed as a whole, and 32 is a pot core of the magnetic pole portion 31. A circular magnetic pole surface serving as an end surface on the opening surface side and a cylindrical outer wall 33 forming a part of the pot core S3P.

A coil (not shown) for urging the magnetic pole portion 31 is housed in the space between the magnetic pole portion 31 and the outer wall 33. The pair of pot cores S3P are arranged so that their magnetic pole surfaces 32 face each other with the coin passage 2 interposed therebetween.

[0014]

However, in the coin sorting apparatus having the above-mentioned conventional structure, the modified coin having the outer diameter and the plate thickness of the foreign currency may be judged as the genuine Japanese coin, and the modified coin is illegally used. I was sometimes told. An object of the present invention is to provide a coin sorter capable of correctly sorting such modified coins as false coins.

[0015]

In order to solve the above-mentioned problems, a coin sorting apparatus according to claim 1 has a plurality of sensors (material sensor S1, outer diameter sensor S2, plate thickness) using an oscillator (OSC) as a power source. (Sensor S30 etc.) is arranged along the coin passage (2), and (detection circuits 101-103, rectification circuit 121
To 123, A / D converters 131 to 133, determination means 16
1 to 164, through the total authenticity determination means 200, etc.) A coin sorting device for determining the authenticity of the coin from the signal waveforms obtained from the respective sensors as the coin (3) on the coin passage passes. Yes, at least one of the sensors (S3
0, etc., hereinafter referred to as a specific sensor), at least near the passage center plane, with respect to a plane (hereinafter referred to as the passage center plane) passing through the center between both side surfaces of the coin passage while sandwiching the coin passage. A pair of iron cores having a symmetrical structure are provided, and each of the pair of iron cores faces the passage center plane side,
A prismatic shape that is parallel to the passage central surface and has rectangular magnetic pole surfaces (302A, 302B) each having a short side and a long side of a substantially predetermined length as end faces and extends perpendicularly to the passage central surface to the side opposite to the passage central surface. Two magnetic pole parts having substantially the same shape (301A, 301A)
B), the end faces of the two magnetic pole portions are included in substantially the same plane, the long sides of the rectangle of the end faces are orthogonal to the traveling direction of the coin, and the long sides have a predetermined gap. Are arranged in parallel with each other, the magnetic pole surfaces of the two magnetic pole portions have polarities different from each other, and the pair of magnetic pole surfaces facing each other across the coin passage have the same polarity as the power source. Are energized by the coils (305a to 305d) that correspond to each of the pair of iron cores,
Magnetic shield means (outer wall 303 or the like) is provided for preventing magnetic flux entering and leaving the iron core from interfering with at least an adjacent sensor based on the bias of the coil.

The coin sorting device of claim 2 is the coin sorting device of claim 1.
In the coin sorting device according to the item 1, the predetermined gap between the long sides of the rectangle is included in the range of 1 mm to 3 mm. The coin sorting device of claim 3 is the coin sorting device of claim 1 or 2.
In the coin sorting device described in paragraph 1, the length of the short side of the rectangle is included in the range of 1 mm to 3 mm.

The coin sorting device of claim 4 is the coin sorting device of claim 1.
In the coin sorting device according to any one of 1 to 3, the long side of the rectangle has a length of 3 mm or more.
A coin sorting device according to a fifth aspect is the coin sorting device according to any one of the first to fourth aspects, wherein each of the pair of iron cores and a magnetic shielding means corresponding to each iron core are respectively pot cores (S30P). So that they are integrated together.

The coin sorting device of claim 6 is the coin sorting device of claim 1.
In the coin sorting device according to any one of 1 to 5, a predetermined level (reference level LVS) in a signal waveform obtained from the specific sensor as a coin passes through the coin passage.
Predetermined time intervals (for example, 1 m) for the above signal regions
S) The time-series data string indicating the magnitude of the signal obtained by sampling is equally divided into a predetermined first plurality (n) of sections, and the representative value of the data for each of the equally divided sections ( Of the boundary value, average value, maximum value or minimum value X ₁ , X ₂ , ... X _n-1 ) of the section, at least a representative value of data of a predetermined second plurality of sections (for example, , X
_m-1 , X _m , X _{m + 1} ) is used to provide a genuineness determination unit (unevenness determination unit 164) for determining the authenticity of the coin.

To summarize the operation of the present invention, the structure of the plate thickness sensor is changed so that not only the plate thickness of the coin but also the irregularities on the surface of the coin can be detected with high accuracy, and the modified coin obtained by processing the foreign currency is eliminated. It is easy to do. That is, it has an outer wall and two prism-shaped magnetic pole portions each having a substantially rectangular magnetic pole surface as an end surface and having rectangular long sides of the magnetic pole surface arranged parallel to each other. The pot cores that are excited so that their surfaces have mutually different polarities are provided on both sides of the coin passage so that the two magnetic poles of the pot core on one side and the two magnetic poles of the pot core on the opposite side face each other with the same polarity. (In other words, the coils of the pot cores that form a pair with the coin passage sandwiched therebetween are connected in antiphase), and the long side of the rectangle of the magnetic pole surface is arranged so as to be orthogonal to the traveling direction of the coin, and the plate thickness sensor is arranged. Constitute.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view showing a schematic arrangement of the entire sensor portion of a coin sorting device of the present invention. Also in the coin sorting apparatus of the present invention, similarly to FIG. 7, sensors for detecting the material, outer diameter, and plate thickness of the inserted coin are arranged along the coin passage 2 in which the inserted coin rolls.

Here, the material sensor S1 and the outer diameter sensor S2 are the same as those shown in FIG. 7, but the plate thickness sensor has a square outer shape which can detect not only the plate thickness but also the unevenness on the surface of the coin with high accuracy. It is replaced by the plate thickness sensor S30. FIG. 2 shows a cross section of the entire sensor portion viewed from above the coin passage 2. 3 is an enlarged view of the portion of the plate thickness sensor S30 of FIG. 1, in which FIG. 3 shows the arrangement of the magnetic pole surfaces 302A and 302B of the plate thickness sensor S30 in the traveling direction of the coin 3 rolling down the coin passage 2. Show.

FIG. 4 shows a detailed structure of the plate thickness sensor S30. FIG. 4A shows a pot core S30 of the plate thickness sensor S30.
The perspective view showing the shape of P, the figure (C) is a cross-sectional view of the plate thickness sensor S30 seen from above the coin passage 2, and the diagrams (B) and (D) are respectively the pair of plate thickness sensors S30. It is the figure which looked at one side in the arrow direction of P and Q of the figure (C). Figure 4
As shown in (A), the pot core S of the plate thickness sensor S30.
30P includes two magnetic pole portions 301A and 301B and the two
And an outer wall 303 surrounding one magnetic pole portion.

The two magnetic pole portions 301A and 301B
Is formed into a prismatic shape having a predetermined substantially rectangular end surface,
Side surfaces corresponding to the long sides of the rectangle are arranged in parallel with each other with a predetermined gap. Pot core S30P
The outer wall 303 prevents magnetic flux flowing in and out of the magnetic pole portions 301A and 301B from flowing out of the outer wall 303 and affecting an adjacent sensor, that is, the outer diameter sensor S2 in the present example. Has the role of increasing accuracy.

The magnetic pole surfaces 302A and 302B of the magnetic pole portions 301A and 301B and the end surface of the outer wall 303 on the pot core open surface side are included in almost one plane as shown in FIG. Portions of 301A, 301B and the outer wall 303 corresponding to the end surfaces on the non-opening side of the pot core are integrally coupled to the bottom surface portion 304 of the pot core.

As shown in FIGS. 4B to 4D, coils 305a and 305b are wound around the magnetic pole portions 301A and 301B of one pot core S30P of the pair, and the other pot core S30P. 301A of magnetic pole
And coils 301B and 301B are wound with coils 305c and 305d, respectively. In this example, the coils 305a and 305b, and 305c and 305d are connected in series as shown in FIG.
305b and series coils 305c and 305d are also connected in series.

The arrows indicated by alternate long and short dash lines in FIGS. 4 (B) and 4 (D) use the oscillator OSC as a power source to form the coils 305a-30.
The direction of the high-frequency current flowing through 5d at the same time point is shown. The dotted arrow in FIG. 4C indicates the magnetic pole surface 302 of each of the two pot cores S30P at this time point.
The direction of the magnetic flux φ entering and leaving between A and 302B is shown. As is apparent from FIG. 4C, the same pot core S3
The magnetic pole surfaces 302A and 302B in the 0P have different polarities, and the magnetic pole surfaces 302A and 302B facing each other with the coin passage 2 of the pair of pot cores S30P facing each other have the same polarity. Excitation is performed.

In other words, the series coils 305a, 305b and 305c, 305 of each of the paired pot cores S30P.
It is connected in anti-phase with d. As shown in FIG. 3, the plate thickness sensor S30 is arranged such that the long sides of the substantially rectangular magnetic pole surfaces 302A and 302B of the pot core S30P are orthogonal to the traveling direction of the coin 3.

The arrangement, shape and size of the magnetic pole surfaces 302A and 302B are important for improving the accuracy of detecting the unevenness of coins. For example, the magnetic pole surfaces 302A and 302 are used.
It is desirable that the gap in the coin advancing direction with B is 1 to 3 mm, the length of the short side of the rectangle of the magnetic pole surface is 1 to 3 mm, and the length of the long side of the rectangle of the magnetic pole surface is 3 mm or more.

FIG. 5 is a block diagram showing the configuration of the main part of the control circuit of the coin sorting device of the present invention. In the figure, a material sensor S1 composed of coils S1a and S1b that are connected in phase across the coin passage 2 is connected to a detection circuit 101, the output of the detection circuit 101 is rectified by a rectification circuit 121, and further, an A / D converter 131. It is converted into a digital value by and input to the material determination means 161.

Similarly, the outer diameter sensor S2, which is composed of coils S2a and S2b connected in phase with the coin passage 2 in between, is connected to the detection circuit 102, and the output of the detection circuit 102 is the rectification circuit 1.
It is rectified by 22, further converted into a digital value by the A / D converter 132, and input to the outer diameter determining means 162. In addition, the series-connected coil 305 described in FIG.
Similarly, a plate thickness sensor S30 in which a, 305b and 305c, 305d are connected in reverse phase with the coin passage 2 in between is also connected to the detection circuit 103, and the output of the detection circuit 103 is the rectification circuit 1
It is rectified by 23 and further converted into a digital value by the A / D converter 133. This A / D converter 133
The digital output of is input to the plate thickness determination means 163 and also to the unevenness determination means 164.

Then, the judgment results of the respective judging means 161 to 164 are inputted to the comprehensive authenticity judging means 200, and finally the authenticity of the inserted coin is judged. Here, the detection circuit 1
01, 102 and 103 are all bridge circuits 1 of FIG.
0, an oscillator OSC, and a differential amplifier circuit 11 have the same configuration as the circuit excluding only the coin sorting sensor S, and a material sensor S1, an outer diameter sensor S2, and a plate thickness sensor S30 are provided in each of the constituent circuits. The coin sorting sensor S is connected as a replacement.

The rectifier circuits 121, 122, 123 all correspond to the rectifier circuit 12 of FIG. 10, and the A / D converter 131,
Both 132 and 133 correspond to the A / D converter 13 of FIG. Further, the material determining means 161, the outer diameter determining means 16
2. Each of the plate thickness determination means 163 is also the difference detection circuit 1 of FIG.
4, comparison circuit 15, determination circuit 16, center value memory 17,
It has the same configuration as the circuit including the tolerance memory 18.

With such a configuration, the material determining means 16
1, the waveform data from the material sensor S1 which is the output of the A / D converter 131, that is, the peak value of the detection characteristic value of the material of the coin is related to the material as in FIG. For each coin sorter, the central value M determined by the denomination is sandwiched, and it is checked for each denomination whether it is within the predetermined upper and lower limit width of the denomination, and there is a denomination whose peak value is within the upper and lower limit width. If it is true, if it does not exist, a false provisional determination signal is output.

Similarly, the outer diameter determination means 162 also outputs the waveform data from the outer diameter sensor S2, which is the output of the A / D converter 132, that is, the peak value of the detection characteristic value of the outer diameter of the coin.
It is checked for each denomination whether it is within a predetermined upper and lower limit width of the denomination, which is related to the outer diameter and has a central value M determined by the denomination for each coin sorting device, and it is true if the corresponding denomination exists. If it does not exist, a false provisional judgment signal is output.

Similarly, the plate thickness determination means 163 is also A / D.
The waveform data from the plate thickness sensor S30, which is the output of the converter 133, that is, the peak value of the detection characteristic value of the plate thickness of the coin concerned is related to the plate thickness and sandwiches the central value M determined by the coin type for each coin sorting device. For each denomination, it is checked whether or not the denomination is within a predetermined upper and lower limit width of the denomination, and a true provisional determination signal is output if the corresponding denomination exists, and false if it does not exist.

Next, the operation of the unevenness determining means 164 will be described.
The operation of the unevenness determining means 164 is the same as the operation of the pattern determining means described in Japanese Patent Application Laid-Open No. 2001-167310, which is a prior application of the present applicant. FIG. 6 is a diagram showing, as a model, time-series waveform data obtained from the plate thickness sensor S30 for the inserted coin. That is, in the figure, the horizontal axis represents time t, and the vertical axis represents the digital conversion value X of the detected waveform from the plate thickness sensor S30 output by the A / D converter 133.

In the example of FIG. 6, the waveform obtained from the plate thickness sensor S30 is sampled by the AD converter 133 at intervals of about 1 mS, and the unevenness determining means 164 indicates the digital conversion value X as this sampling value on the figure. From the time when the level exceeds the predetermined level LVS shown by the alternate long and short dash line until the time when the level becomes lower than the predetermined level LVS, the respective sampling values are sequentially stored in a memory (not shown).

The unevenness determining means 164 equally divides the section of the sampling data sequence, which is obtained after the end of this sampling and is arranged in chronological order, into n pieces, and the representative value of the data for each of the divided sections (in this example, the boundary). Value) X ₁ , X ₂ , ...
, X _n-1 is calculated. The unevenness determining unit 164 calculates the characteristic value Z represented by the following equation (1) based on this representative value.

[0039]

## EQU1 ## Z = A ₁ .X ₁ + A ₂ .X ₂ + ... + A _n-1 .X _n-1 (1) Here, the data representative values X ₁ , X ₂ ,. The weighting factors A ₁ , A ₂ , ..., A _n-1 corresponding to the respective X _n-1 are constants that facilitate the appearance of the characteristic of the characteristic value Z.

For example, the representative value X shown in FIG.₁，
X₂・ ・ ・ ・ ・ ・ X_n-1From the weighting factor A _m-1= 1, A_m
= -2, A_{m + 1}= 1, other weighting factors A_i= 0 (however
i = 1, 2, ... Of n-1, m-1, m, m + 1
(Excluding), the characteristic value Z shown in the following equation (2) is obtained.
Then, from this formula (2),
You can get the size.

[0041]

Z = X _m−1 −2X _m + X _{m + 1} (2) In this example, the boundary value of the n-divided data section is used as the representative value. The average value, the maximum value or the minimum value of the sampling data of 1 may be used as the representative value.

The unevenness judging means 164 sandwiches the central value M between the characteristic value Z thus obtained, which is related to the characteristic value Z and which is determined by the coin type for each coin sorting device, as described with reference to FIG. It is checked for each denomination whether it is within a predetermined upper and lower limit of the denomination. Then, if there is a denomination whose characteristic value Z is within the upper and lower limit width, a true provisional determination signal is output, and if not, a false provisional determination signal is output.

The comprehensive judging means 200 is a material judging means 16
1, the outer diameter determination means 162, the plate thickness determination means 163, the true / false tentative determination signals of the unevenness determination means 164 are combined, and there is a denomination in which all the tentative determination signals of the determination means 161 to 164 are true. At that time, the input coin is determined to be a genuine coin of the denomination.

[0044]

According to the present invention, a plurality of sensors are arranged along a coin passage, and the authenticity of the coin is verified from the signal waveforms obtained from the respective sensors as the coin on the coin passage passes. In the electronic coin sorting device for judging, the outer wall,
Each of the magnetic pole surfaces has a substantially rectangular magnetic pole surface as an end surface, and has two prismatic magnetic pole portions arranged with the long sides of the rectangular parallel to each other. The two magnetic pole surfaces have different polarities due to the incorporated coil. The two magnetic poles of the pot core on one side and the two magnetic poles of the pot core on the opposite side are opposite to each other with the same polarity on both sides of the coin passage. Since the long side of the rectangle is arranged so as to be orthogonal to the traveling direction of the coin to configure the plate thickness sensor, not only the plate thickness of the coin but also the unevenness of the coin surface can be accurately measured from this plate thickness sensor. It becomes possible to detect, and it is possible to easily exclude the modified coin of the foreign currency that is close to the true coin.

[Brief description of drawings]

FIG. 1 is a front view showing a principle structure of a main part of a coin sorting device as an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a sensor portion viewed from above the coin passage of FIG.

FIG. 3 is an enlarged view of a plate thickness sensor portion of FIG.

FIG. 4 is a diagram showing a detailed configuration of a plate thickness sensor as one embodiment of the present invention.

FIG. 5 is a configuration diagram of a control circuit as an embodiment of the present invention.

FIG. 6 is a waveform diagram for explaining the operation of the unevenness determining unit of FIG.

FIG. 7 is a front view of a conventional device corresponding to FIG.

FIG. 8 is a perspective view of a pot core of a conventional plate thickness sensor.

FIG. 9 is a principle structural diagram in which the sensor portion of FIG. 7 is simplified.

FIG. 10 is a block circuit diagram showing a circuit configuration of a main part of a conventional device.

11 is a characteristic diagram for explaining the operation of FIG.

[Explanation of symbols]

1 coin slot 2 coin passage 3 coins 4 gates 5 Specie passage 6 return passage 10 bridge circuit 11 Differential amplifier circuit OSC oscillator S1 Material sensor S2 outer diameter sensor S30 Thickness sensor S30P pot core 101-103 detection circuit 121-123 Rectifier circuit 131-133 A / D converter 161 Material judgment means 162 outer diameter determination means 163 Thickness determination means 164 Concavity and convexity determining means 200 Comprehensive authenticity judgment means 301A, 301B Magnetic pole part 302A, 302B Magnetic pole surface 303 outer wall 304 Bottom part 305a to 305d coils

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2F063 AA16 AA19 AA43 BA30 BB05                       BC06 DA01 GA01 KA01 LA19                 2G017 AD03 AD04 AD05 BA05                 2G053 AA22 AB21 BA15 BB03 BC14                       CA03 CB24 DA01 DB02 DB08                 3E002 AA01 AA03 AA04 AA13 AA14                       BC02 BC03 CA01 CA08

Claims (6)

[Claims] 1. A plurality of sensors having an oscillator as a power source are arranged along a coin passage, and the authenticity of the coin is judged from a signal waveform obtained from each sensor as the coin passes through the coin passage. In the coin sorting device, at least one of the sensors (hereinafter, referred to as a specific sensor) is located on a plane (hereinafter, referred to as a passage center surface) that passes through the center between both side surfaces of the coin passage while sandwiching the coin passage. In contrast,
At least in the vicinity of the passage central surface, paired iron cores having a plane-symmetric structure are provided, and each of the pair of iron cores faces the passage central surface side, is parallel to the passage central surface, and has a substantially predetermined length. Has a rectangular magnetic pole surface composed of a short side and a long side as an end surface, and has two prism-shaped magnetic pole portions having substantially the same shape and extending perpendicularly to the passage center surface to the side opposite to the passage center surface. Are arranged such that the end faces thereof are included in substantially the same plane, the long sides of the rectangle of the end faces are orthogonal to the traveling direction of the coin, and the long sides are parallel to each other with a predetermined gap. Is biased by a coil using the oscillator as a power source such that the magnetic pole surfaces of the two magnetic pole portions have polarities different from each other and the pair of magnetic pole surfaces facing each other across the coin passage have the same polarity. Corresponding to each pair of iron cores, Coin sorting apparatus in which the magnetic flux in and out of the iron core is characterized by comprising a magnetic shield means for preventing interference to at least adjacent sensors based on. 2. The coin sorting device according to claim 1, wherein the predetermined gap between the long sides of the rectangle is 1 mm to 3 mm.
A coin sorting device characterized by being included in. 3. The coin sorting device according to claim 1 or 2, wherein the length of the short side of the rectangle is included in the range of 1 mm to 3 mm. 4. The coin sorting device according to claim 1, wherein the long side of the rectangle has a length of 3 mm or more. 5. The coin sorting device according to claim 1, wherein each of the pair of iron cores and a magnetic shielding means corresponding to each iron core are integrally formed by a pot core. And coin sorting equipment. 6. The coin sorting device according to claim 1, wherein a signal area of a predetermined level or higher in a signal waveform obtained from the specific sensor as a coin passes through the coin passage. Obtained by sampling at predetermined time intervals,
A time-series data string indicating the magnitude of a signal is equally divided into a predetermined first plurality of sections, and at least a predetermined second plurality of the representative values of the data for each of the equally divided sections is divided. A coin sorting device comprising a genuine / counterfeit determination unit that determines the authenticity of the coin by using a representative value of data of the section.