JP2002279474A - Abrasion resisting material and coin discriminating sensor in coin conveying passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coin discriminating sensor of high reliability, capable of preventing generation of static electricity, and surely discriminating coins conveyed on a sliding face. SOLUTION: This coin discriminating sensor is provided with a reflection-type detecting sensor mounted on a bottom face side of a coin passage, a first transmission-type detecting sensor, mounted in a state of holding one end part of the passage, and a second transmission-type detecting sensor mounted in a state of holding the other end part of the passage; the coin passage is made out of a conductive material; and the conductive ceramic is applied to a bottom part and a side face part as the coin passage to discharge the static electricity on the coins, whereby the generation of the noise can be prevented, and the coins can be discriminated properly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coin processing apparatus which employs a coin identification system for identifying coins while sliding them on a passage by means of a belt, and more particularly to a coin sorting machine, a coin depositing machine, and a coin wrapping machine. The present invention relates to an abrasion-resistant material and a coin identification sensor suitable for a coin processing machine such as the one described above and preventing generation of noise due to static electricity.

[0002]

2. Description of the Related Art Japanese Patent No. 2539521 discloses an example of a coin passage device of a coin processing machine, and describes a mirror-finished iron-based metal member as a coin passage member. An outline of this device will be described below with reference to FIG.

The coin M is transferred from the hopper 201 to the coin passage 20.
4, the belt surface 207 and the rubber roller 208 hanged on the pulleys 205 and 206 on the passage surface 2 of the coin passage 204.
04a is conveyed and reaches the coin passage 211 side. The coin passage 211 has a coin rail 223 protruding above the passage surface 211a, and a plurality of windows whose dimensions 221 (224a to 221f) from the outer surface of the rail 223 to the outside thereof correspond to the outer diameter of each coin. Hole (coin sorting hole) 222 (2
22a to 222f) are provided, and on the window hole 222,
A transport belt 215 wound around the drive pulley 213 and the driven pulley 214 is stretched. Conveyor belt 215
Inside, a pressing roller 251 having a truncated cone shape is arranged. Since the coin M is conveyed while sliding on the passage surface 211a of the coin passage 211 while being pressed by the conveyance belt 215, the coin M falls from the corresponding window hole 222 and is arranged at a position below these coins. Is stored in the storage unit (not shown). Thus, the coin passage surface 224a,
The coin M slides on the 211a while being pressed by the transport belts 207 and 215.

Here, as a passage member forming each of the coin passages 204 and 211, a rolled steel plate bright product which is a mirror-finished iron-based metal member is used, and the surface of this member is subjected to salt nitrocarburizing treatment. The surface hardened layer is formed, and then the surface hardened layer is polished to form a smooth surface hardened layer.
The passage surfaces 204a and 211a are made of an iron-based metal member having a smooth hardened layer.

[0005]

However, in the above-mentioned conventional apparatus, the passage section other than the identification section can use an iron-based wear-resistant plate, but when a magnetic coin sensor is used, it is an iron-based member. Therefore, it cannot be used as a passage member of the passage portion where the coin sensor is located.

Therefore, conventionally, a ceramic (insulating) plate is stretched over the passage surface. That is, the magnetic sensor for discriminating coins is installed in the coin conveyance path, and ceramics having high wear resistance is attached to the target passage so that the coin sensor can be easily removed, and that part is used as a part of the conveyance path. Therefore, when the coin is slid in the coin passage, in a low-temperature and low-humidity environment, the coin, which is a metal, rubs against the ceramic at a high speed and the coin is charged with static electricity, and is often discharged at a certain place. . Due to the discharge of the static electricity, as shown in FIG.
Part), and the identification accuracy does not improve.

As a countermeasure against static electricity, the signal waveform is conventionally traced by software, and the portion where the signal waveform changes abruptly is not used for the discrimination processing, thereby preventing the influence of static electricity noise. Even if noise removal processing is performed by software, noise does not disappear, and if noise that is not assumed by the noise removal software occurs, a problem may occur. Therefore, it is necessary to prevent the generation of noise itself.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wear-resistant material and a coin identification sensor in a coin transport path for preventing generation of static electricity.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a wear-resistant material in a coin transport passage for coin identification, and an object of the present invention is to provide a coin transport passage provided with a sliding surface with a sliding surface spaced one by one. In a coin transport path having a coin identification sensor for identifying a denomination of a coin to be received, the coin transport path covers a path surface facing a magnetic detection sensor provided facing the lower surface of the coin transport path, or This is achieved by a thin plate-shaped conductive material that is adhered so as to cover both of the passage regulating passage guides provided on the left and right in the traveling direction.

Another invention relates to a coin identification sensor,
The object of the present invention is to provide a coin passage portion, a reflection type detection sensor arranged facing a lower surface of the coin passage portion, and a first transmission member arranged to sandwich one end of the passage. A coin identification sensor comprising a mold detection sensor and a second transmission type detection sensor disposed so as to sandwich the other end of the passage, wherein the coin passage of the coin identification sensor is made of a conductive material. This is achieved by configuring.

Further, the above two inventions can be more effectively achieved by using conductive ceramics as the conductive material, or using conductive alumina or conductive zirconia as the conductive ceramics. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is to prevent a conductive coin from being charged with static electricity without deteriorating the magnetic detection sensitivity and to provide a passage member having excellent wear resistance. Conductive alumina, conductive zirconia) is attached to the coin sliding surface of the magnetic sensor. Conductive ceramics are conductive and generate less eddy currents.
The resistivity of conductive ceramics is 100
Since it is about 0 times, the generation of eddy current is 1/10 ³ (0.
01%). For this reason, there is no influence on the quality of the magnetic signal, and there is a durability that does not cause a problem such as abrasion when coins are conveyed. In order to remove the noise due to the discharge of static electricity, the surface of the magnetic path where the coin slides is made of a conductive material, and if you consider discharging the static electricity accumulated in the ground (ground part), In consideration of identifying the type of the metal piece by detecting the generated eddy current loss, there was a concern that the signal would be attenuated and could not be used for determination. According to this, there is no such problem.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a coin feeding, conveying and discriminating section of a coin processing apparatus. A coin feeding section 101 composed of a rotating disk, a conveying path for conveying coins 100 separated and conveyed one by one. 102, a conveying belt 103 for pressing and conveying coins against a sliding surface, regulating guides 104a and 104b for guiding coin conveyance, a diameter sensor 110 for detecting coin diameter data by a coin identification sensor, a material and thickness of the coin. And material thickness sensors 111 and 112 for detecting the pressure, and a passage 105 of the identification unit.

Here, the discrimination area 105 of the coin passage is attached with a conductive ceramic thin plate, and the coin sliding surface is provided so as to be smoothly connected to the front and rear passages 102. As a material for the passage portion of the identification sensor region 105 of the coin passage portion, zirconia, which is a non-conductive material, has conventionally been used as a wear-resistant plate. ing. In addition, a conductive ceramic is also adhered to the discriminating portion passage regulating guide 106a where the outer periphery of the coin contacts. Its thickness is 0.5 mm. The reason why the conductive ceramic is also adhered to the passage regulating guide 106 is to prevent the signal from being different from the normal one due to the eddy current generated in the coin flowing outside through the passage side wall. .

The second embodiment shown in FIG. 2 has substantially the same configuration as that shown in FIG.
Coin identification sensor 1 integrated in the housing shown in Fig. 1
20.

FIG. 3 is a partial sectional perspective view showing the structure of the coin identification sensor 120 of the present invention, and FIG. 4 is a sectional structural view thereof. The coin identification sensor 120 has a U-shape having a clearance for attaching and detaching the conveyor belt 103 at an upper portion, a rectangular space bottom at the center portion forming a coin passage 11, and an outer surface at an outer surface. A shield plate 12 for magnetic shielding is provided in layers. The coin identification sensor 120 is provided with side sensors 20 and 30 having a rectangular parallelepiped shape of a transmission detection type so as to sandwich one end of the passage 11,
Below this, a cylindrical sensor 40 of reflection detection type is disposed. The side sensors 20 and 30 are bilaterally symmetric. The side sensor 20 has a primary coil 21 and a secondary coil 23 wound above and below an inverted U-shaped side core 22, and the side sensor 30 has a U-shape. A primary coil 31 and a secondary coil 33 are wound above and below the side core 32. The center sensor 40 is a cylindrical pot core 4.
1 and a primary coil 42 on the outer peripheral surface of the pot core 41.
Is wound, and a secondary coil 43 is wound and embedded on the inner peripheral surface. Further, a coil for a temperature sensor (not shown)
Is provided.

As a material for the passage 11, zirconia, which is a non-conductive material, has been used as a wear-resistant plate, but in the present invention, conductive ceramics (conductive alumina, conductive zirconia) are used.

In the present invention, excitation and detection signal processing are performed on the coin identification sensor 120 with the circuit configuration shown in FIG. That is, the oscillation signal from the oscillator 1 is divided by the frequency divider 2 into a low frequency (4 kHz), a medium frequency (16 kHz), and a high frequency (250 kHz).
KHz) and a bandpass filter (BPF) for each frequency
The signals are combined (added) by the adder 4 via 3L, 3M, and 3H, and applied to the primary coils 21, 32, and 42 of the coin detection sensor 10 via the current amplifier 5. That is, the low-frequency, medium-frequency, and high-frequency combined excitation signals are supplied to the primary coils 21 and 31 of the side sensors 20 and 30 via the current amplifier 5 and to the primary coil 42 of the center sensor 40.

The outputs of the secondary side coils 23, 33 and 43 are detected via amplifiers 44, 44L and 44R, respectively, and are reflected through a band-pass filter, a full-wave rectifier circuit and a low-pass filter, respectively.
z signal R16S, reflection 250KHz z signal R250S, transmission L4K
Hz signal TL4S, transmission L16KHz signal TL16S, transmission L250
KHz signal TL250S, transmission R4KHz signal TR4S, transmission R1
A 6KHz signal TR16S and a transmitted R250KHz signal TR250S are obtained. That is, the output of the secondary coil 43 of the center sensor 40 passes through the amplifier 44 and passes through a bandpass filter (BPF) 451 to
At 453, the frequency is separated into low frequency, middle frequency, and high frequency, respectively, and further reflected through a full-wave rectifier circuit 461-463 and a low-pass filter (LPF) 471-473.
S, reflected 16 KHz signal R16S, reflected 250 KHz signal R25
Get 0S. The center sensor 40 includes the primary coils 42 and 2
The secondary coil 43 forms an eddy current loss type magnetic sensor.

The secondary coil 23 of the side sensor 20
Is passed through an amplifier 44L to a bandpass filter (BPF).
At 45L1 to 45L3, the frequency is separated into low frequency, middle frequency, and high frequency, respectively.
3 and a low-pass filter (LPF) 47L1-47L3, a transmitted L4KHz signal TL4S, a transmitted L16KHz signal TL16.
S, a transmission L250 KHz signal TL250S is obtained. The output of the secondary coil 33 of the side sensor 30 passes through an amplifier 44R and is separated into low frequency, middle frequency, and high frequency by bandpass filters (BPF) 45R1 to 45R3, respectively. LP
F) R4KHz signal TR4 transmitted through 47R1 to 47R3
S, transmission R16KHz signal TR16S, transmission R250KHz signal TR
Obtain 250S. Further, a secondary coil output of the temperature sensor is output as a temperature monitor signal THS via an amplifier 481, a BPF 482, a full-wave rectifier circuit 483, and an LPF 484.

The above-mentioned reflected 4 KHz signal R4S, reflected 16 KHz
Signal R16S, reflection 250KHz Signal R250S, transmission L4KHz
Signal TL4S, transmission L16KHz Signal TL16S, transmission L250KH
z signal TL250S, transmission R4KHz signal TR4S, transmission R16K
The Hz signal TR16S, the transmitted R250KHz signal TR250S, and the temperature monitor signal THS are input to a discriminating means (not shown) for discriminating coins, and discrimination processing and determination are performed.

The discriminating means is for discriminating coins composed of a plurality of metals such as clad coins in which coins are made of three types of metal layers. The authenticity of coins is identified by comparing with the judgment frame provided in the above. At high frequencies there is little signal difference depending on the material, but the attenuation rate is determined by the material of the surface layer, and at low frequencies it is also affected by the material of the intermediate layer, so compare the attenuation rate at each frequency with a predetermined judgment standard. Thus, coins can be identified. Further, in the present example, coins are conveyed while being shifted to the side sensor 20 side.

Referring to FIGS. 1 and 2, the shape of the passage guide 104a is such that the coins are slightly pushed upward by the conveyor belt 103, and the coins are conveyed in a one-sided manner. In such a configuration, the identification means performs signal processing and detection as shown in Japanese Patent Application Laid-Open No. 9-245214. Since it is not necessary to refer to signal processing in this specification, the description is omitted.

In the present invention, the passage 1 of the coin detection sensor 10
Since 1 is made of conductive ceramics (conductive alumina, conductive zirconia), a coin conveyed for identification is not charged with static electricity. For this reason, the detection signals of the reflected 4 KHz signal R4S (upper signal waveform), the reflected 16 KHz signal R16S (middle signal waveform), and the reflected 250 KHz signal R250S (lower signal waveform) which are the outputs of the center sensor 40 shown in FIG. As described above, the characteristics were free from noise. In the present invention, since coins are not charged and noise due to static electricity does not occur, accurate identification can be performed without taking measures by software.

[0026]

As described above, according to the wear-resistant material and the coin identification sensor of the present invention, since the conductive and wear-resistant conductive ceramics are provided, the generation of static electricity can be prevented, which has been conventionally required. Eliminates the need for software for removing static noise. Since the electrical resistivity of conductive ceramics is three orders of magnitude different from that of metals, the amount of eddy current is small and there is almost no effect on magnetic signals.

[Brief description of the drawings]

FIG. 1 is a mechanism diagram illustrating a first coin path configuration example according to the present invention.

FIG. 2 is a mechanism diagram showing a second coin path configuration example according to the present invention.

FIG. 3 is a partial cross-sectional perspective view showing an example of a coin identification sensor according to the present invention.

FIG. 4 is a sectional structural view of a coin identification sensor according to the present invention.

FIG. 5 is a block diagram showing an excitation and a detection signal processing system of the coin detection sensor.

FIG. 6 is a characteristic diagram showing an example of a detection signal of the coin detection sensor according to the present invention.

FIG. 7 is a diagram illustrating a conventional coin passage member.

FIG. 8 shows a sensor output waveform on which noise is superimposed when a conventional passage member is used.

[Explanation of symbols]

 Reference Signs List 11 passage 20 side sensor (transmission type detection sensor) 30 side sensor (transmission type detection sensor) 40 center sensor (reflection type sensor) 41 pot core 42 primary coil 43 secondary coil 100 coin 102 coin conveyance passage 103 conveyance belt 104a, b Conveyance passage regulation guide 105 Identification sensor area 106a, b Identification section passage regulation guide 110 Diameter sensor 111 Material / material thickness sensor 111 Material / material thickness sensor 120 Coin identification sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiyuki Kueda 1-3-1, Shimoteno, Himeji-shi, Hyogo Inside Glory Industries Co., Ltd. (72) Inventor Yumiko Sugitani 1-3-1, Shimoteno, Himeji-shi, Hyogo No. Glory Industries Co., Ltd. (72) Inventor Naoki Oka 1-3-1, Shimonoteno, Himeji City, Hyogo Prefecture F Glossy Industry Co., Ltd. F-term (reference) AD05 BA05 BA11 CA19 CA21 CA36 DA06

Claims (5)

[Claims] 1. A coin transport path provided in a coin transport path and having a coin identification sensor for identifying a denomination of coins transported one by one on a sliding surface, wherein the coin transport path is An abrasion-resistant material in a coin transport passage made of a thin plate-shaped conductive material adhered so as to cover a passage surface facing a magnetic detection sensor provided on a lower surface. 2. A coin transport path provided in a coin transport path and having a coin identification sensor for identifying denominations of coins transported one by one on a sliding surface at an interval, wherein the coin transport path is Coin transport made of a thin plate-shaped conductive material that covers the passage surface facing the magnetic detection sensor provided on the lower surface and covers the passage regulating passage guide provided on the left and right of the coin in the traveling direction of the coin Wear resistant material in the passage. 3. A wear-resistant material in a coin transport passage according to claim 1, wherein said conductive material is a conductive ceramic. 4. A coin passage portion, a reflection type detection sensor arranged facing a lower surface of the coin passage portion, and a first transmission type detection member arranged to sandwich one end of the passage. A second sensor disposed between the sensor and the other end of the passage.
A coin identification sensor is constituted by the transmission type detection sensor described above, and the coin passage is constituted by a conductive material. 5. The coin identification sensor according to claim 4, wherein said conductive material is a conductive ceramic.