JPH0954846A - Magnetic discrimination element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic discrimination part, with which the substitutive coin of a present shop and the substitutive coin of another shop can be discriminated or the like even when the coins have the same size and weight, concerning the element of substitutive coin, etc., to be used in place of cash at an amusement center or coin laundry. SOLUTION: A substitutive coin 1 is formed in the shape of a disk by the method of powder metallurgy with the mixed powder of ferromagnatic stainless powder such as SUS 430 and non-magnetic stainless powder such as SUS 304 as raw materials and the entire body becomes a magnetic discrimination part 2. By changing the mixture ratio of ferromagnetic stainless powder to non- magnetic stainless powder in the raw materials, saturation magnetic flux density is adjusted to any one of about 10kG, about 7kG, about 5kG, about 3kG and about 1kG, for example.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a game machine for an amusement center, a coin laundry, and the like.
Regarding magnetic identification elements such as substitute coins that are inserted into equipment instead of cash such as coins when the equipment is used, whether or not it is a substitute coin of its own store, even if it has the same shape and weight, The present invention relates to a magnetic identification element capable of identifying price information and the like.

[0002]

2. Description of the Related Art In amusement centers and the like,
When using a game machine, a substitute coin may be used instead of cash. Also, in a coin laundry or the like, an alternative coin may be used instead of cash from the viewpoint of crime prevention. Conventionally, an alternative coin used for this type of application is generally manufactured by punching an iron plate with a sheet metal press and then plating the surface thereof. For example, different coins of different sizes or weights are used for each store, and the substitute coins of other stores cannot be used for the device of the own store.

[0003]

However, in the case of the conventional alternative coin, if the alternative coin of another store has the same size and weight as the alternative coin of the own store, the alternative coin of the other store is used by the device of the own store. There is a problem that it may be used. Further, the alternative coin maker needs to manufacture various alternative coins having different sizes and weights for each store, which is complicated and causes an increase in manufacturing cost.

Further, even a device maker or the like needs to manufacture many types of devices having different alternative coin discriminators, which is complicated and causes an increase in product cost. Furthermore, since conventional alternative coins are distinguished from those of other stores only by size or weight, alternative coins of the same size and weight, for example, 1000 yen, 500 yen.
Price information such as yen, 100 yen, 50 yen, and 10 yen cannot be given. Therefore, in an amusement center or the like, only one type of alternative coin is generally used. For example, when the game is worth 1000 yen, the user needs to prepare 10 alternative coins worth 100 yen. There is a problem that it is complicated.

The present invention has been made in view of the above-mentioned problems of the conventional example, and provides a magnetic identification element capable of magnetically identifying the same size and weight. The purpose is.

[0006]

The above-mentioned problems are characterized by having a magnetic discriminating section which adjusts the saturation magnetic flux density or the magnetic permeability to a predetermined value and can discriminate by the value of the saturated magnetic flux density or the magnetic permeability. This is solved by the magnetic identification element.
Secondly, the magnetic discriminating element is characterized in that it has a magnetic discriminating portion which generates a magnetic field having a predetermined intensity and is discriminable by the intensity of the magnetic field.

Thirdly, the saturation magnetic flux density or the magnetic permeability is adjusted to a predetermined value, and the first magnetic discriminating portion which can be discriminated by the saturation magnetic flux density or the magnetic permeability and a magnetic field having a predetermined strength are generated. And a second magnetic discriminator capable of discriminating based on the strength of the magnetic field. In the present invention, the magnetic discriminator having the saturation magnetic flux density or the magnetic permeability as a predetermined value is provided. By measuring the saturation magnetic flux density or the magnetic permeability of this magnetic discriminating unit and determining whether or not the value is the predetermined value, even if the elements have the same size and weight, they can be used for the device of own shop. Whether or not, price information, etc. can be identified.

Also, when the magnetic discriminating portion is made of a magnetic material which generates a magnetic field having a predetermined strength, the magnetic field intensity generated by the magnetic discriminating portion is measured by using a magnetic measuring method. By determining whether or not the element has the same strength and weight, it is possible to identify whether or not the element has the same size and weight for the device of its own shop, price information, or the like. In this case, it is preferable that the magnetic discriminator generate a weak magnetic field (about 100 gauss or less) to the extent that the elements are not magnetically attached to each other due to the generated magnetic force.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. (First Embodiment) FIGS. 1 (a) and 1 (b) are a plan view and a sectional view showing a first embodiment of the present invention. The alternative coin 1 is a disk-shaped element, and is made into a disk shape by powder metallurgy using a mixed powder of a ferromagnetic stainless powder such as SUS430 and a non-magnetic stainless powder such as SUS304 as a raw material. It is molded. In this embodiment, the entire alternative coin 1 serves as the magnetic identification unit 2.

The alternative coin 1 is a ferromagnetic stainless steel in the raw material.
Of the mixing ratio of the powder of non-magnetic powder and non-magnetic stainless powder
Therefore, the saturation magnetic flux density is, for example, about 10 kGauss, about 7
k gauss, about 5 k gauss, about 3 k gauss and about 1 k gau
Has been adjusted to one of the. 2 is a game machine, etc.
FIG. 3 is a schematic view showing an alternative coin discriminator provided in the device of FIG.
is there. This alternative coin discriminator is used for the passage area of the alternative coin 1.
A pair of magnets 5a, 5 arranged to face each other across
b and the pair of magnets 5a, 5b between the alternative coin 1
In a pair of coils 6a, 6b arranged with the pass band sandwiched
It is composed of The coils 6a and 6b are coil windings.
The directions are opposite to each other. Also, disconnect the coil 6a.
Area S₁Is the cross-sectional area S of the coil 6b₂Set smaller than
The number of turns of the coil 6a is n₁, The number of turns of coil 6b
N₂Then, n₁S₁= N₂S ₂Is set to
You.

When the alternative coin 1 inserted from the insertion slot passes between the coils 6a and 6b, a saturation magnetic flux density is imparted to the alternative coin 1 by the magnetic fields of the magnets 5a and 5b, and the alternative coins are inserted into the coils 6a and 6b. A voltage proportional to the saturation magnetic flux density of 1 is generated. Therefore, if the relationship between the voltage and the saturation magnetic flux density is checked in advance, the alternative coin 1 is the one of its own store due to the voltage generated in the coils 6a and 6b when the alternative coin 1 passes through the alternative coin discriminator. Whether or not it can be identified.

Further, for example, a magnetic flux density of about 10 kGauss is 1000 yen, and a magnetic flux density of about 7 kGauss is 500.
If the price information is decided as yen, 100 yen for about 5k gauss, 50 yen for about 3k gauss, 10 yen for about 1k gauss, the alternative coin 1 passes through the alternative coin discriminator. The price information of the alternative coin 1 can be identified by the voltage generated in the coils 6a and 6b.

As described above, in this embodiment, even if the size and weight of the alternative coin 1 are the same, the saturation magnetic flux density distinguishes the alternative coin of the own store from the alternative coin of the other store or price information. Can be identified. This allows
There is an effect that it is possible to prevent the use of alternative coins of other stores in an amusement center or the like. Also,
For example, in an amusement center, there is an advantage that a user of a game device does not have to carry a large amount of substitute coins. Further, the game machine maker can design the machines to be delivered to a large number of stores to the same specifications, and can cope with each store only by adjusting the alternative coin discriminator. As a result, the productivity of the device is improved.

In this embodiment, as a raw material for the alternative coin 1, a high saturation magnetic flux density permendur powder (F
It is also possible to use a mixed powder of e: 49% by weight-Co: 49% by weight-V: 2% by weight) and iron powder. in this case,
The saturation magnetic flux density can be adjusted by changing the mixing ratio of the permendur powder and the iron powder. (Second Embodiment) FIGS. 3 (a) and 3 (b) are a plan view and a sectional view showing a second embodiment of the present invention. The alternative coin 11 is
A disk-shaped element, for example, a disk-shaped element formed by powder metallurgy using a mixed powder of permalloy powder and iron powder as a raw material. Also in this embodiment, the entire alternative coin 11 is the magnetic identification unit 12.

In the alternative coin 11, the maximum magnetic permeability is adjusted to, for example, about 10, about 7, about 5, about 3, or about 1 by changing the mixing ratio of the permalloy powder and the iron powder in the raw material. Has been done. The alternative coin 11 of this embodiment can be identified by using the identifier of FIG. 2, and the same effect as that of the first embodiment can be obtained.

As a raw material for the alternative coin 11, permalloy powder may be used. In this case, the magnetic permeability can be adjusted by changing the Ni content in permalloy. Further, as a raw material of the alternative coin 11, a mixed powder of permalloy powder and Ni powder can be used. In this case, the magnetic permeability can be adjusted by changing the mixing ratio of the permalloy powder and the Ni powder.

(Third Embodiment) FIGS. 4 (a) and 4 (b) are a plan view and a sectional view showing a third embodiment of the present invention. The substitute coin 21 is a disk-shaped member, and is composed of a base body 23 made of a non-magnetic material and a magnetic identification portion 22 embedded in the center of the base body 23. The base 23 is, for example, SU
It is made of non-magnetic stainless like S304. The magnetic discriminating unit 22 is formed by molding powder magnets such as anisotropic Ba ferrite (BaO.6Fe ₂ O ₃ : ferrite magnet mainly composed of iron oxide) into a disk shape by powder metallurgy. Is. In addition, the magnetic identification unit 22
Is repeatedly magnetized and demagnetized (giving a magnetic field in the opposite direction to that when magnetized), the magnetic flux density thereof is, for example, about 100 gauss, about 70 gauss, about 50 gauss, about 30 gauss, about 0 gauss. Has been adjusted to one of.

FIG. 5 is a schematic view showing an alternative coin discriminator provided in the apparatus. This alternative coin discriminator includes a pair of Hall elements 25a, 25b arranged across the pass band of the alternative coin 21, and these Hall elements 25a, 2b.
It is comprised by the support members 26a and 26b which support 5b. When the substitute coin 21 inserted into the device passes between the Hall elements 25a and 25b, the Hall elements 25a and 25b output a voltage according to the strength of the magnetic field due to the magnetic field generated by the magnetic identification unit 22. By measuring this voltage, it is possible to identify whether or not the alternative coin 21 belongs to the own store. The hall element 25a,
There may be only one of 25b.

Further, for example, a magnetic flux density of about 100 Gauss is 1000 yen, and a magnetic flux density of about 7 Gauss is 500 yen,
100 yen for about 5 gauss, 50 for about 3 gauss
If the price information is decided such that a yen, about 0 gauss, is 10 yen, the price of the alternative coin 21 will depend on the voltage generated in the hall elements 25a and 25b when the alternative coin 21 passes through the alternative coin discriminator. Information can be identified.

As described above, in the present embodiment, even if the size and weight of the alternative coins 21 are the same, due to the strength of the magnetic field generated by the magnetic identification section 22, the alternative coins of the own store and the alternative coins of other stores are replaced. And the price information can be identified. Further, since the surface of the alternative coin is stainless steel, there is an advantage that it looks good.

In this embodiment, as a raw material for the magnetic identification portion 22, in addition to ferrite, an OP magnet (Oxide Pa) is used.
rticle: Metal oxide magnet), ESD (Elongated Single)
Domain type), Mn-Bi type, rare earth type magnets and other powder type magnets formed into a disk shape by powder metallurgy may be used. Further, as the magnetic identification part 22, an iron-chromium magnet, or a lattice transformation magnet such as a high carbon steel alloy, W steel, Al steel and KS steel, or MK steel, NKS steel, Alnico, Colmax, Tecorna X, Kunife, Precipitation hardening magnets such as Cunico, Baicalloy and Pt-Co may also be used.

As the OP magnet, for example, CoO.
Fe ₂ O ₃ 50% by weight, balance Fe ₂ O.Fe ₂
Some consist of O ₃ and inevitable impurities. Further, the ESD is a magnet in which a ferromagnetic metal such as Fe or Fe—Co is made into fine powder having a single magnetic domain and is fired by utilizing its crystal anisotropy. Further, as the rare earth magnet, SmCo
₅ , Sm ₂ Co ₁₇ and Nd ₂ Fe ₁₄ B (neodymium magnet).

Examples of the high carbon steel include C
The W steel has a content of 0.8 to 1.2% by weight, and the balance of Fe and inevitable impurities.
Some C contents are 0.5 to 0.8% by weight, W contents are 5.0 to 6.0% by weight, and the balance is Fe and inevitable impurities. As the Al steel, for example, the C contents are 1.5 to 3.
Some of them are 0% by weight, the Al content is 6 to 9% by weight, and the balance is Fe and inevitable impurities.

The above-mentioned lattice-transformed magnet has a metal structure from a γ phase (austenite phase: face-centered cubic lattice) to an α phase (martensite phase: body-centered tetragonal lattice) by quenching.
It is made into a permanent magnet by transforming into. Further, the alnico is a Fe-based alloy magnet whose main component is AlNiCo. The colmax has, for example, a Ni content of 13% by weight and a Co content of 25%.
Some of them are composed of wt%, Al content is 8 wt%, Cu content is 3 wt%, Nb content is 1 wt%, and the balance is Fe and inevitable impurities. Further, as the TECORNA X, for example, Ni content is 15% by weight, Co content is 34% by weight, Al content is 7% by weight, Cu content is 4% by weight,
Some of them have a Ti content of 5% by weight and the balance Fe and unavoidable impurities. Furthermore, the cunife includes, for example, a Ni content of 20% by weight, a Cu content of 60% by weight, and a balance of Fe and inevitable impurities. Furthermore, the cunico includes, for example, a Ni content of 20% by weight, a Cu content of 60% by weight, and the balance of Co and inevitable impurities. Furthermore, as the baicalloy, for example, Co content is 50% by weight,
Some have a V content of 14% by weight and the balance Fe and unavoidable impurities.

The term "precipitation hardening type magnet" is used immediately after casting, or after being heated to a high temperature and then rapidly cooled, then 500 to 7
It refers to the one in which the magnetism is improved by precipitating an additional element in the metal structure by the heating treatment at 00 ° C. (Fourth Embodiment) FIGS. 6A and 6B are a plan view and a sectional view showing a fourth embodiment of the present invention. The alternative coin 31 is
A first magnetic identification part 32 formed by powder metallurgy using a mixed powder of a ferromagnetic stainless powder and a non-magnetic stainless powder as a raw material, and an anisotropic Ba ferrite magnet embedded in the first magnetic identification part 32. And a second magnetic discriminator 33.

The first magnetic discriminating section 32 has a saturation magnetic flux density of, for example, about 10 kGauss by changing the mixing ratio of the ferromagnetic stainless powder and the nonmagnetic stainless powder in the raw material.
About 7k gauss, about 5k gauss, about 3k gauss and about 1k
It has been adjusted to one of Gauss. The magnetic flux density of the second magnetic discriminator 33 is approximately 100 gauss, approximately 70 gauss.
It is adjusted to one of Gauss, about 50 Gauss, about 30 Gauss, and about 0 Gauss.

A game machine or the like which uses the alternative coin 31 of this form is provided with the alternative coin identifier shown in FIG. 2 and the alternative coin identifier shown in FIG. The alternative coin 31 is first identified by the saturation magnetic flux density of the first magnetic identification part 32 when passing through the alternative coin identifier shown in FIG. 2, and then passes through the alternative coin identifier shown in FIG. In doing so, the second identification is performed by the magnetic flux density generated from the second magnetic identification unit 33.

In the alternative coin 31 of this form, the same effect as in the first to third forms can be obtained, and the identification information can be given to the first and second magnetic identification parts 32 and 33, respectively. There are advantages. (Other Embodiments) FIGS. 7A and 7B are a plan view and a sectional view showing another embodiment of the present invention. The alternative coin 41 is
A disk-shaped base 42 made of a non-magnetic material, and the base 4
2 and a magnetic identification portion 43 embedded in the center. The magnetic identification part 43 is made of the magnetic material shown in the first and second embodiments, and the saturation magnetic flux density or magnetic permeability is adjusted to a predetermined value.

FIGS. 8 (a) and 8 (b) are a plan view and a sectional view showing still another embodiment of the present invention. The substitute coin 46 is
A disk-shaped magnetic discriminating portion 44 and a base 4 made of ring-shaped non-magnetic stainless steel fitted to the outer periphery of the magnetic discriminating portion 44.
5 and 5. The magnetic identification unit 44 has
It is formed of the magnetic material shown in the third mode, and the saturation magnetic flux density or the magnetic permeability is adjusted to a predetermined value, or a magnetic field having a predetermined strength is generated.

In the alternative coin 47 shown in FIG. 9, a magnetic discriminating portion 49 made of a magnetic material shown in the first to third forms is exposed on one surface side of a disk-shaped base body 48 made of non-magnetic stainless steel. Is embedded to do so. With these alternative coins 41, 46, 47, the same effects as those of the first to third forms can be obtained.

FIG. 10 is a diagram showing a form in which the present invention is applied to a key. The tip 50a of the key 50 is provided with a plurality (five in the figure) of magnetic identification sections 51 that are formed of anisotropic Ba ferrite or the like and generate a weak magnetic field. The magnetic flux density of each magnetic identification unit 51 is set to any of about 100 gauss, about 70 gauss, about 50 gauss, about 30 gauss, and about 0 gauss. In the present embodiment, since five types of identification information are given to each magnetic identification unit 51, the five magnetic identification units 47 can obtain 3125 types of keys.

An example of making the alternative coin of the present invention will be described below. (First Preparation Example) First, as raw materials, a non-magnetic stainless powder (SUS304) having a particle size of 100 mesh or less (147 μm or less) and a ferromagnetic stainless steel powder (SUS430) having a particle size of 100 mesh or less are also used. Table 1 below
The mixed powder mixed in the ratio shown in was prepared.

Then, a lubricant (stearic acid) is mixed with these mixed powders and pressurized at a pressure of 4 t / cm ² ,
A coin-shaped molded body having a diameter of 23 mm and a thickness of 2 mm was obtained. Then, these molded bodies are heated at a temperature of about 400 ° C. for about 1 hour to remove the lubricant, and then sintered at a temperature of 1250 ° C. in a hydrogen atmosphere, and five types of alternative coins (No. 1, No. 2, No. 3, No. 4, No. 5) were obtained.

The saturation magnetic flux density of these alternative coins was measured. The results are shown in Table 2 below. In addition, it was confirmed that these alternative coins can be discriminated from each other by a discriminator composed of a magnetic flux density measuring device and a slicer circuit.

[0035]

[Table 1]

[0036]

[Table 2]

(Second Preparation Example) First, as a raw material, a mixed powder was prepared by mixing permalloy powder having a particle size of 100 mesh or less and Ni powder having a particle size of 325 mesh or less (47 μm or less) in the ratio shown in Table 3 below. did. Then, a lubricant (stearic acid) is mixed with these mixed powders to obtain 4 t / c.
Pressed with m ² pressure, diameter is 23mm, thickness is 2mm
A coin-shaped molded body of was obtained. Then, these molded bodies were heated at a temperature of 400 ° C. for 1 hour to remove the lubricant, and then sintered at a temperature of 1250 ° C. in a hydrogen atmosphere to obtain five alternative coins (No. 6, No. .7, No.8, N
o.9, No.10) was obtained.

The maximum magnetic permeability of these alternative coins was measured. The results are shown in Table 4 below. In addition, it was confirmed that these alternative coins can be discriminated from each other by a discriminator composed of a magnetic permeability measuring instrument and a slicer circuit.

[0039]

[Table 3]

[0040]

[Table 4]

(Third Preparation Example) First, a Ba ferrite magnet having a diameter of 15 mm is placed in the center of a mold, and a non-magnetic stainless powder (SUS) containing a lubricant is embedded in the mold.
304) and then pressure was applied to obtain a coin-shaped molded body having a diameter of 23 mm and a thickness of 2 mm. Then, these molded bodies were heated at a temperature of 400 ° C. for 1 hour to remove the lubricant, and then sintered at a temperature of 1250 ° C. in a hydrogen atmosphere to obtain a sintered body. Next, these sintered bodies were repeatedly magnetized and demagnetized using an electromagnet, and five types of alternative coins (No. 11, No. 12, No. 12, No. 12, No. 12, having No. 11, No. 12, No. 13, No.14, No.15) were obtained.

It was confirmed that these substitute coins can be discriminated from each other by a discriminator composed of a magnetic flux density measuring device and a slicer circuit.

[0043]

[Table 5]

[0044]

As described above, according to the present invention, whether the saturation magnetic flux density or the magnetic permeability is adjusted to a predetermined value,
Alternatively, since a magnetic discriminating unit for generating a magnetic field having a predetermined strength is provided, even elements having the same size and weight can be discriminated. Therefore, in an amusement center, a coin laundry, or the like, it is possible to prevent a substitute coin from another store from being used in the device of the own store. Further, a manufacturer of game machines can design machines to be delivered to a large number of stores with the same specifications, and can cope with a large number of stores simply by adjusting a substitute coin discriminator. Furthermore, if price information is given to the magnetic identification section, the user of the game machine does not need to carry a large amount of coins at an amusement center, for example.

[Brief description of drawings]

FIG. 1 is a diagram showing an alternative coin according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing a substitute coin discriminator for discriminating a substitute coin according to the first embodiment.

FIG. 3 is a schematic diagram showing a second alternative coin according to the present invention.

FIG. 4 is a schematic diagram showing an alternative coin according to a third aspect of the present invention.

FIG. 5 is a schematic view showing a substitute coin discriminator for discriminating substitute coins of a third form.

FIG. 6 is a schematic view showing an alternative coin according to a fourth mode of the present invention.

FIG. 7 is a schematic view showing an alternative coin according to another embodiment of the present invention.

FIG. 8 is a schematic view showing a substitute coin according to still another embodiment of the present invention.

FIG. 9 is a schematic view showing a substitute coin according to still another embodiment of the present invention.

FIG. 10 is a diagram showing a form in which the present invention is applied to a key.

[Explanation of symbols]

1,11,21,31,41,46,47 Alternative coins 2,22,32,33,43,44,49,51 Magnetic identification part 5a, 5b Magnet 6a, 6b Coil 23,42,45,48 Base 25a , 25b Hall element 26a, 26b Support member 50 Key

Claims (3)

[Claims] 1. A magnetic discriminating element comprising a magnetic discriminating section which adjusts the saturation magnetic flux density or the magnetic permeability to a predetermined value and discriminates by the value of the saturated magnetic flux density or the magnetic permeability. 2. A magnetic discriminating element comprising a magnetic discriminating portion which generates a magnetic field having a predetermined intensity and is discriminable by the intensity of the magnetic field. 3. A first magnetic discriminator which adjusts the saturation magnetic flux density or magnetic permeability to a predetermined value, and which can be discriminated by the saturation magnetic flux density or magnetic permeability, and which generates a magnetic field having a predetermined strength. A magnetic discriminating element comprising: a second magnetic discriminating portion which can discriminate based on the strength of a magnetic field.