JPH067423Y2 - Bill validator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bill validator having a plurality of identification heads for identifying the denomination of a bill.

[Conventional technology]

2. Description of the Related Art Conventionally, a bill validator shown in FIGS. 4 to 7 has been known.

In FIG. 1, reference numeral 1 denotes a relatively long main body case formed of a non-magnetic material such as resin or aluminum die cast. The main body case 1 has a rectangular mounting hole 1A penetrating upward and downward. Has been drilled. 2 is the main body case 1
Is a rectangular frame member made of a non-magnetic material such as a resin material that is fitted in the mounting hole 1A, and the frame member 2 has a plurality of bottomed circular magnet fitting holes 2A, 2A ,. Has been formed.
Reference numerals 3, 3, ... Are cylindrical permanent magnets fitted in the magnet fitting holes 2A of the frame member 2, and the permanent magnets 3 have a south pole magnetized surface on the upper side in the axial direction and an N pole on the lower side. It becomes a pole magnetized surface, and the S pole magnetized surface is flush with the upper surface of the frame member 2.

Reference numeral 4 denotes a spacer made of a single plate material placed on the upper surface of the frame member 2. The spacer 4 is made of, for example, a non-magnetic material such as ceramic or resin material, and the thickness dimension d of the spacer 4 will be described later. The thickness is set so that the maximum output voltage of the magnetoresistive element 5 can be maintained.

.. are magnetic resistance elements serving as magnetoelectric conversion elements provided on the spacers 4 at positions corresponding to the permanent magnets 3 by, for example, printing means, and the magnetic resistance elements 5 are heads of banknotes 9 described later. The voltage-converted detection signal is output depending on the presence or absence of the magnetic ink when passing over 7. Reference numerals 6 and 6 denote side spacers located on both sides of each magnetoresistive element 5 in the width direction and provided on the spacer 4 and made of a non-magnetic material such as ceramic or resin material. Is formed so as to be higher than the upper surface side of each magnetoresistive element 5 by a minute gap a, and when each head 7 described later is bent, each magnetoresistive element 5 is damaged or piezo noise is generated by contact. Is being prevented. Since the minute gap a becomes an air gap and leads to a decrease in detection sensitivity, ideally the minute gap a should be zero, but the head 7 is preferable.
Depends on the material, hardness, thickness, etc., usually 0.05 to 0.2 mm
It is set to a degree.

Reference numeral 7 denotes a non-magnetic and wear-resistant head mounted on the main body case 1 so as to cover the magnetoresistive elements 5 and the side spacers 6, and the head 7 is made of, for example, a metal material made of non-magnetic metal. Is able to guide you smoothly.

Further, reference numerals 8, 8, ... Are thin plate-like sheets provided as needed between the heads 7 and the upper surfaces of the side spacers 6, 6 in order to make the output characteristics of the magnetoresistive elements 5 uniform. Each sheet 8 is, for example, a ceramic thin plate (glass plate) made of a non-magnetic material such as a resin film or an adhesive tape, and forms a gap g between the side spacers 6 and 6 and the head 7. Note that the gap g is ideally zero, but the thickness is individually adjusted in order to make the output characteristics of each magnetoresistive element 5 uniform.

The banknote identification device according to the conventional technology is configured in this way, but since the banknote 9 is a magnetic printed matter using magnetic ink, the banknote 9 moves relative to the head 7 so that each magnetoresistive element 5 becomes magnetic. An output voltage is generated according to the presence or absence of ink, and the denomination can be identified from the output waveform of this output voltage.

[Problems to be solved by the invention]

By the way, each magnetoresistive element 5 has a different element sensitivity due to an individual manufacturing error, and also has an output characteristic different due to a dimensional tolerance of the spacer 4, the side spacer 6, the head 7, an assembly error and the like. Therefore, when trying to identify the bill 9 in the state where the bill 9 is attached to the main body case 1, the output voltage value varies even at the same magnetic ink position.

Therefore, in the prior art, a non-magnetic thin sheet 8 is inserted between the magnetoresistive element 5 and the head 7, and the sheet thickness of the sheet 8, that is, the gap g is individually adjusted. The output of the magnetoresistive element 5 is adjusted so as to be uniform.

Here, the relationship between the gap g of the thin sheet 8 and the output voltage characteristic is as shown in FIG. 7, and the larger the gap g, the lower the output voltage.

Therefore, assuming that the output voltage of the magnetoresistive element 5 having the lowest output voltage is V ₁ , the sheets 8 having different thicknesses in the range of the gap 0 to g ₁ are not inserted in the other magnetoresistive elements 5. However, the use of the sheet 8 to make the output voltage uniform is a sacrifice of high output characteristics.

The present invention has been made in view of the above problems of the prior art, and by adjusting the output of each magnetoelectric conversion element by adjusting the gap between the spacer and the permanent magnet,
An object of the present invention is to provide a bill validator that can be adjusted within the range of maximum output characteristics.

[Means for solving problems]

In order to solve the above-mentioned problems, a bill validator according to the present invention comprises a permanent magnet, a spacer made of a non-magnetic material provided on a magnetized surface of the permanent magnet, and a magnetoelectric conversion device provided on the spacer. An element and a side spacer provided to secure a minute gap between the magnetoelectric conversion element and the head are provided.

A feature of the configuration adopted by the present invention is a sheet that forms a gap between the magnetized surface of the permanent magnet and the spacer in the state where a certain minute gap is secured between the magnetoelectric conversion element and the head. It is because the member was inserted.

[Action]

The minute gap between the magnetoelectric conversion element and the head is kept constant by the spacer and the side spacer within a range in which the head can be bent. Therefore, the output characteristic of the magnetoelectric conversion element is adjusted by adjusting the gap of the sheet member while the positional relationship between the spacer or the side spacer and the magnetoelectric conversion element with respect to the head is fixed. This allows the magnetoelectric conversion element to have uniform output characteristics within the range of its maximum output efficiency.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

In the figure, 11 is a main body case made of a non-magnetic material, 1
2 is a frame member made of a non-magnetic material fitted in the mounting hole 11A of the main body case 11, and 13, 13, ... Are fitted in the magnet fitting holes 12A of the frame member 12, and the upper surface side is the S pole and the lower surface. The side is a magnetized surface of N pole and the upper side is the same plane as the frame member 12, 14 is a spacer made of a non-magnetic material placed on the upper surface of the frame member 12, and 15, 15 ... Magneto-resistive elements 16, 16 provided on the spacer 14 corresponding to the permanent magnets 13 are made of non-magnetic material disposed on both sides of each magneto-resistive element 15 in the width direction. Side spacers 17 that secure a minute gap a between the element 15 and a head 17 to be described later are attached to the main body case 11 to cover the magnetoresistive elements 15 and the side spacers 16. Heads, these are also according to the prior art When is configured substantially the same manner. However, in the present embodiment, the thickness dimension D of the spacer 14 is formed so as to have a relationship of D <d as compared with the thickness dimension d at the maximum output voltage unlike the spacer 4 according to the prior art. . Further, in this embodiment, the thin sheet 8 is not used, and the minute gap a between the magnetoresistive element 15 and the upper surface of the head 17 is maintained constant.

Further, 18 is a thin plate-like sheet member forming an essential part of this embodiment, and the sheet member 18 is interposed between the S pole side magnetized surface of the permanent magnet 13 and the lower surface of the spacer 14, Ceramic thin plate, resin film,
A non-magnetic material such as an adhesive tape is used. The sheet member 18 secures a gap G between the permanent magnet 13 and the spacer 14 and adjusts the gap G appropriately so that the output characteristics of the magnetoresistive element 15 can be made uniform.

Although the present embodiment is configured in this manner, the operation of the bill validator is not different from that of the conventional art.

However, the element sensitivities of the magnetoresistive elements 15 are different from each other, the dimensional tolerances of the side spacers 16, the head 17, etc.,
When there are variations in the output characteristics of the magnetoresistive elements 15 due to an assembly error or the like, the gap G is individually adjusted by the sheet member 18 to make the output characteristics uniform.

Here, looking at the relationship between the gap G and the output voltage, FIG.
As shown in, when the gap G has a predetermined size ▲ ▼, the maximum
Output voltage becomes Vmax, which is smaller than the specified dimension ▲ ▼
The output voltage is V in the specified size ▲ ▼_BThis again
The output voltage is V_CBecomes
Therefore, the thickness dimension D of the spacer 14 is set to the maximum output voltage Vma.
Formed at least ▲ ▼ thinner than the plate thickness at x
However, depending on the sheet 18, a minute size corresponding to the dimension ▲ ▼
If only the gap is adjusted, each magnetoresistive element 15
Output voltage ▲ Adjust within the range of ▼ and uniform
Output characteristics.

Here, the adjustment range ▲ ▼ of the gap G is within 1 mm,
That is, ▲ ▼ and ▲ ▼ are each within 0.5 mm,
The output voltage at that time is approximately 0 to ± 10% of Vmax, and the output of each magnetoresistive element 15 can be adjusted within the maximum efficiency range.

In the embodiment, a plurality of permanent magnets 13 are fitted to the frame member 12, a spacer 14 provided with a magnetoresistive element and a side spacer is placed on the frame member 12, and this assembly is attached to the attachment hole 11A of the main body case 11. However, this is for the purpose of improving the assembling efficiency, and the identification sensor unit may be configured for each individual permanent magnet 13 and magnetoresistive element 15, and each identification sensor unit may be incorporated in the main body case. A Hall element or the like may be used as the magnetoelectric conversion element. Further, the banknotes are not limited to those in a narrow sense, and include banknotes such as gift certificates and securities made of magnetic printed matter.

[Effect of device]

The bill discriminating apparatus according to the present invention is as described above in detail, and the minute gap between the magnetoelectric conversion element and the head is kept constant, and the output characteristics due to the element sensitivity of the magnetoelectric conversion element, manufacturing, assembly error, etc. Of the magnetic field of the permanent magnet is fixed by the gap adjustment by the sheet member inserted between the magnetized surface of the permanent magnet and the spacer, the positional relationship between the spacer or the side spacer and the magnetoelectric conversion element is fixed. By selecting the thickness of the sheet member,
The output can be adjusted in the vicinity of the maximum output voltage of the magnetoelectric conversion element, and the maximum efficiency can be adjusted.

[Brief description of drawings]

1 to 3 relate to an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a main part similar to FIG. 5, FIG. 2 is a lateral sectional view similar to FIG. 6, and FIG. A characteristic diagram showing the relationship between the output voltage and the gap between the permanent magnet and the spacer, FIGS. 4 to 7 relate to the prior art, and FIG. 4 is a fragmentary view showing the overall construction of the bill validator. And FIG. 5 is a front view of FIG.
Fig. 6 is a vertical cross-sectional view of the main part shown in the direction of arrow V, and Fig. 6 is VI in Fig. 4.
FIG. 7 is a characteristic cross-sectional view showing the relationship between the output voltage and the gap between the side spacer and the head. 11 ... Main body case, 12 ... Frame member, 13 ... Permanent magnet, 14 ... Spacer, 15 ... Magnetoresistive element, 16 ...
... Side spacers, 17 ... Heads, 18 ... Sheet members.

Claims (2)

[Scope of utility model registration request] 1. A permanent magnet, a spacer made of a non-magnetic material provided on a magnetized surface of the permanent magnet, a magnetoelectric conversion element provided on the spacer, and between the magnetoelectric conversion element and the head. In a bill validator comprising a side spacer provided to secure a minute gap in the space, a magnetized surface of the permanent magnet and a spacer are provided with a certain minute gap secured between the magnetoelectric conversion element and the head. A bill identifying device, wherein a sheet member that forms a gap between the bill identifying device and the sheet is inserted. 2. The bill validator according to claim 1, wherein the spacer is formed so as to have a plate thickness equal to or thinner than the maximum output plate thickness.