JPH11250304A - Coin sorting coil device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely discriminate coins by means of a coin sorting coil device. SOLUTION: The coin sorting coil device 1 that detects the change in magnetic field by passing of a coin, is provided with a circular core 12 having plural projections 3 to 11 and windiness L0 , L1 to L4 and L5 to L8 wound around each of the projections 3 to 11 of the core 12. The core 12 is equipped with a center projection 3 arranged almost in the center of the circle, first projections 4 to 7 arranged outside of the center projection 3, and second projections 8 to 11 arranged in a position symmetrical to the first projections regarding the center projection 3. The first projections 4 to 7 and the second projections 8 to 11 are arranged cocentrically to the center projection 3. The windings L0 is wound around the center projection 3 in a direction opposite to the winding direction of the windings L1 to L4 and L5 to L8 wound around the first projections 4 to 7 and the second projections 8 to 11. As the winding L0 is wound around the center projection 3 in the direction opposite to the winding direction of the windings wound around the first projections 4 to 7 and the second projections 8 to 11, characteristics of various kinds of coins can surely be detected as a change in the magnetic field.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a coin sorting device,
In particular, the present invention relates to a coin sorting coil device capable of reliably identifying authenticity of a coin passing through a magnetic field.

[0002]

2. Description of the Related Art An apparatus for sorting coins using a magnetic coil sensor is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-147170. The sorting device includes a magnetic coil sensor having two coil sensor elements connected in the same phase or opposite phases and arranged coaxially opposite to each other. The coil sensor element is disposed in a wall surface facing the coin to be identified passing through the coin passage, and has a detection surface which is smaller in diameter than the coin and faces the coin. The magnetic coil sensor is disposed near the base surface of the coin passage so that the detection surface of the magnetic coil sensor is smaller than the detection surface area of the magnetic coil sensor itself even when the area where the coin scans the coin is the maximum. It is possible to determine that the center of the coin has arrived at a predetermined position in the coin passage from the detection signal of the sensor, detect the thickness and outer diameter of the coin, and sort the coin with higher accuracy than before.

[0003]

The sorting apparatus disclosed in the above publication arranges a plurality of coil sensor elements at different positions on a coin and measures the magnetic impedance of the coin. Had a disadvantage that could not be identified.

An object of the present invention is to provide a coin sorting coil device capable of sufficiently identifying coins.

[0005]

A coin sorting coil device according to the present invention for detecting a change in a magnetic field due to the passage of a coin includes a core having a plurality of protrusions and a winding wound around each protrusion of the core. Have. The core includes a central projection disposed substantially at the center, a first projection disposed outside the central projection, and a second projection disposed symmetrically to the first projection with respect to the central projection. ing. The first protrusion and the second protrusion are arranged concentrically with respect to the center protrusion, and are wound around the center protrusion in a direction opposite to a winding direction of a winding wound around the first protrusion and the second protrusion. Wind the wire. Since the winding is wound in the direction opposite to the center projection with respect to the winding direction of the winding wound around the first projection and the second projection, the characteristics of various coins can be reliably detected as a change in the magnetic field.

In the embodiment of the present invention, a plurality of, for example, four, first and second projections are formed concentrically with respect to the center projection. The magnetic field generator may be arranged opposite to the core at a certain distance from the core, and when a coin passes near the core, the output of each winding connected in series is received. An oscillating device that applies an oscillating voltage to the magnetic field generator or an oscillating device that applies an oscillating voltage to each winding may be provided. When a magnetic field is formed by energizing each winding, the output of each winding connected in series is received when a coin passes near the core. The oscillating device includes an oscillator that generates a vibration pulse, and a driving circuit connected between the oscillator and the oscillating coil device.

[0007] A detector connected to the receiving coil device, an offset circuit for reducing the output level of the detector, an amplifier for amplifying the output of the offset circuit, and a counter for converting an analog output of the amplifier into a digital signal. A discriminating device having an A / D converter and a discriminating circuit for discriminating coin characteristics from the output of the check A / D converter may be connected.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a coin sorting coil device according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a coin sorting coil device 1 according to the present invention comprises a core 1 made of an iron-based material.
2 and a plurality of windings 13 attached to the core 12. The core 12 has a disk portion 14 and a plurality of protrusions 3 to 11 projecting from the disk portion 14 at substantially right angles. The central winding L ₀ is wound on the disk portion 14 Noboho central projection 3 provided at the center. The first projections 4 to 7 are arranged above the central projection 3, and the second projections 8 are arranged below the central projection 3.
11 are arranged, the first projections 4 to 7 and the second projections 8
2, are arranged concentrically on the same radius with respect to the center projection 3, as shown in FIG. In addition, the first projections 4 to
7 and the second protrusion each winding 8 to 11 L ₁ ~L ₄ and L ₅ ~L ₈ is wound. As shown in FIG. 3, the windings L ₀ , L _{1 to} L ₄ and L _{5 to} L ₈ are connected in series by one conductor 15, but the first projections 4 to 7 and the second projections 8
To wound central projection 3 the winding L ₀ in the direction opposite to the winding direction of the wound are winding L ₁ ~L ₄ and L ₅ ~L ₈ to to 11.

As shown in FIG. 4, a magnetic field generator 20 is arranged opposite to the coin sorting coil device 1 at a predetermined interval from the core 12. The magnetic field generator 20 includes a circular core 21 and a winding 22 wound around the core 21. In the coin sorting circuit shown in FIG. 5, the winding 22 of the magnetic field generator 20 is connected to an oscillator 24 that generates a vibration pulse via a drive circuit 23, and the control terminal of the drive circuit 23 has a pulse width of the oscillation output. , A pulse waveform, an amplitude and the like. The winding 13 of the coin sorting coil device 1 which faces the magnetic field generator 20 and is spaced apart from the magnetic field generator 20 by a predetermined distance is connected to the first A / D converter 3 via a detection circuit 30, an offset subtraction circuit 31, and an amplifier 32.
3 and the output of the detection circuit 30 is connected to a second A / D converter 34 for adjusting the signal level of the received signal when the power is turned on. A passage 35 through which coins pass is formed between the magnetic field generator 20 and the coin sorting coil device 1.

In the configuration shown in FIG. 5, a vibration pulse such as a rectangular wave, a triangular wave, or a sine wave is applied to the winding 22 of the magnetic field generator 20 from the oscillation circuit 24 via the drive circuit 23 to form a magnetic field in the passage 35. You. This magnetic field is detected by the coin sorting coil device 1, and when the coin passes through the passage 35, the magnetic field changes. At this time, since the output of the coin sorting coil device 1 is converted to the envelope output by the detection circuit 30, as shown in FIG. 6A-C, winding L ₁ ~L ₄ and L ₅
~L ₈ generates the output of the chevron, winding L ₀ is from generates an output of channel-shaped, the composite signal is the output of the channel-shaped as shown in FIG. 6D. As shown in FIG.
7B and 7C because the voltage is represented by a fluctuating voltage of volt (V).
As shown in (1), after being offset downward by the offset subtraction circuit 31, it is amplified by the amplifier 32 in the range of 0.7 to 3.5 volts (V) and shaped. FIG. 7C
7A is converted into a digital signal by the first A / D converter 33. The depth of each part of the detected waveform enlarged as compared with the waveform of FIG. Is converted to FIG. 8 is 50 yen, 100
The output waveform of the amplifier 32 when each coin of 500 yen and 10 yen is detected by the coin sorting coil device 1 is shown. Thus, the first projections 4 to 7 and the second projections 8 to
Since the winding is wound in the opposite direction to the center projection 3 with respect to the winding direction of the winding wound around 11, the characteristics of various coins can be reliably detected as a change in the magnetic field. Since the output of the amplifier 32 for each coin is completely different, the first A / D
Each coin can be completely identified by the digital signal of the converter 33.

The embodiments of the present invention can be modified. For example, the drive circuit 2 may be omitted by omitting the magnetic field generator 20.
At the same time as applying a vibration pulse to the coin sorting coil device 1 with the output of 3, the coin passes through the passage 35,
The fluctuation of the magnetic field may be detected by the coin sorting coil device 1. In the example shown in FIG. 3, the winding only winding L ₀ L ₁ ~L ₄
And L _{5 to} L ₈ are wound in the opposite direction,
Winding L ₁ and L ₅ is diagonally, L ₂ and L _6, L ₃ and L _7, L
₄ and L ₈ and may be selectively wound in the opposite direction. Winding L ₁
~L ₄ and L ₅ ~L ₈ may be at least one by one is not limited to four by four.

The shape of the core 12 is not limited to a circle, but may be a bar as shown in FIG. 9, or an X, a polygon such as a square or a hexagon.

[0014]

As described above, in the coin sorting coil device according to the present invention, the characteristics of various coins can be reliably detected as a change in the magnetic field, and troubles during coin sorting can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a coin sorting coil device according to the present invention.

FIG. 2 is a plan view of a coin sorting coil device according to the present invention.

FIG. 3 is a wiring diagram showing a connection state of each winding.

FIG. 4 is a side view of a coin sorting coil device arranged to face a magnetic field generator.

FIG. 5 is a circuit diagram showing a coin sorting circuit using the coin sorting coil device according to the present invention.

FIG. 6 is an output waveform diagram of each part of a coin sorting coil used in the coin sorting circuit of FIG.

FIG. 7 is a waveform chart showing a state where the output shown in FIG. 6 is shaped into a waveform;

FIG. 8 is a waveform diagram obtained from various coins.

FIG. 9 is a perspective view showing another embodiment of the coin sorting coil device according to the present invention.

[Explanation of symbols]

1. Coin sorting coil device, 3. Central projection, 4.
... 7 first protrusions, 8 to 11 second protrusions, 12
..Core, 13 ... winding, 14 ... disk section,
L ₀ , L _{1 to} L ₄ , L _{5 to} L ₈ ... winding, 20 ... magnetic field generator, 21 ... core, 22 ... winding, 23 ...
Drive circuit, 24 ... oscillation circuit, 25 ... control circuit,
30 detection circuit, 31 offset subtraction circuit,
.. 32, an amplifier, 33, a first A / D converter, 34, a second A / D converter, 35, a passage,

Claims (10)

[Claims] 1. A coin sorting coil device for detecting a change in a magnetic field due to the passage of a coin, comprising: a core having a plurality of projections; and a winding wound around each projection of the core, wherein the core is substantially centered. A central projection, a first projection arranged outside the central projection, and a second projection arranged symmetrically to the first projection with respect to the central projection.
The first protrusion and the second protrusion are arranged concentrically with respect to the center protrusion, and are wound around the center protrusion in a direction opposite to a winding direction of a winding wound around the first protrusion and the second protrusion. A coin sorting coil device characterized by winding a wire. 2. The coin sorting coil device according to claim 1, wherein a plurality of the first projections and the second projections are formed concentrically with respect to the center projection. 3. The coin sorting coil device according to claim 1, wherein four first projections and two second projections are formed concentrically with respect to the center projection. 4. A magnetic field generator is disposed opposite to the core at a predetermined interval from the core, and receives an output of each winding connected in series when a coin passes near the core. 4. The coin sorting coil device according to any one of 3. 5. The coin sorting coil device according to claim 4, further comprising an oscillating device for applying an oscillating voltage to the magnetic field generating device. 6. The method according to claim 1, wherein the coil is energized to form a magnetic field, and when the coin passes near the core, the output of each of the windings connected in series is received. A coin sorting coil device as described in the above. 7. The coin sorting coil device according to claim 6, further comprising an oscillating device for applying an oscillating voltage to each winding. 8. The coin sorting coil device according to claim 5, wherein the oscillating device includes an oscillator for generating a vibration pulse, and a drive circuit connected between the oscillator and the oscillating coil device. 9. A detector connected to a receiving coil device,
An offset circuit for reducing the output level of the detector, an amplifier for amplifying the output of the offset circuit, a check A / D converter for converting an analog output of the amplifier into a digital signal, and a check A / D converter 9. A discriminating device having a discriminating circuit for discriminating a characteristic of a coin from the output of the container is connected.
The coin sorting coil device according to any one of the above. 10. The coin sorting coil device according to claim 1, wherein the core is circular, rod-shaped, X-shaped or polygonal.