JPH0119196B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] This invention relates to a paper sheet discrimination device used in automatic teller machines and the like, and in particular, it discriminates paper sheets by determining the printing pattern of the paper sheets using a light emitting/receiving pair. With regard to paper sheet identification devices, the aim is to improve the identification accuracy for paper sheets that have not been coated with magnetic ink, by using multiple light emitting elements to sequentially irradiate predetermined locations on paper sheets with light of different wavelengths. It is configured to be provided in the light receiving pair.

[Industrial application field]

The present invention relates to a paper sheet discrimination device used in automatic teller machines and the like, and more particularly to a paper sheet discrimination device that discriminates paper sheets by determining the printing pattern of the paper sheets using a light-emitting light-receiving pair.

2. Description of the Related Art Automatic deposit machines and the like are configured such that the inserted banknotes are transferred to a discrimination section, and the discrimination section determines the authenticity and denomination of the banknotes.

Domestic banknotes are generally magnetically printed and recorded, so it is necessary to read them with a magnetic head to determine the authenticity and denomination of the banknote. Can be done.

However, if magnetic recording is not performed, e.g.
When handling paper sheets such as foreign banknotes, it is difficult to distinguish between authenticity and denomination.

Therefore, it is desired to be able to reliably determine the authenticity or denomination of paper sheets, even if such paper sheets are not magnetically recorded.

[Conventional technology]

In an automatic teller machine or the like, the banknotes inserted are transferred one by one to a discrimination section, and the discrimination section determines the authenticity and denomination of the banknotes.

As a result of the determination, if the banknote is a genuine banknote, the amount of the inserted banknote is counted and displayed.

Once this amount is confirmed, the banknote is stored in the storage box.

In this case, if the banknote is determined to be a counterfeit banknote, the banknote will be ejected into the return slot.

The identification device installed in such an identification section generally includes a magnetic head, a plurality of light emitters, and a light receiver corresponding to each light emitter, and these can be used to perform the following identifications. was being carried out.

The magnetic head uses a predetermined width of the running banknote as a track to read a pattern printed with magnetic ink on the track, and the read signal is compared with a reference signal.

On the other hand, the light emitter and the light receiver irradiate the bill with light from the light emitter, receive reflection or transmission of the irradiated light by the light receiver, compare the output signal of the light receiver with a predetermined reference signal, Detects double feed, inclination, length, jam, etc.

Therefore, in such a configuration, the magnetic head plays a major role in validating banknotes, and the magnetic head plays a major role in determining the authenticity and denomination of banknotes.

Incidentally, reading a track of a predetermined width on such banknotes is already known from Japanese Patent Laid-Open No. 54-26800 and Japanese Patent Laid-open No. 54-92394.

[Problem to be solved by the invention]

It is clear that such discrimination using a magnetic head cannot be performed if a banknote that is not printed with magnetic ink is used.

Therefore, instead of a magnetic head, a light emitting element is used to irradiate paper sheets such as banknotes with light from the light emitting element, and the reflected light and transmitted light from the irradiated light are detected by a light receiving element, and the detected detection signal is used. The printing pattern formed on the paper sheet is determined.

However, if printed patterns are determined by detecting reflected and transmitted light using light-receiving elements, it is difficult to distinguish between different shades of printed patterns, especially when paper sheets are printed in color. It had problems that made it unsuitable for discrimination.

Therefore, an object of the present invention is to improve the identification accuracy for paper sheets not coated with magnetic ink.

[Means to solve the problem]

In such an identification device, a plurality of light-emitting elements that emit light of different wavelengths and a light-receiving element are provided in each of the radial through holes formed in a predetermined holder to constitute a light-emitting and light-receiving pair, and the light-emitting and light-receiving pair By arranging the two pairs so as to face each other via the transport path, the light emitting and receiving pair arranged on one side of the transport path can detect reflected light at a predetermined location on the paper sheet. The detection is performed using one shared light receiving element, and the detection of the transmitted light at the predetermined location is performed by the other shared light receiving element using the two opposing pairs of light emitting and receiving light.

With this configuration, the above-mentioned problems are solved.

[Effect]

That is, by arranging the light emitting/receiving pair, which is constructed by providing a plurality of light emitting elements and light receiving elements that irradiate the holder with light of different wavelengths, so as to face each other via a transfer path, each light emitted The element illuminates the front and back sides of the paper sheet with light of different wavelengths, and the light-receiving element detects the reflected light at a predetermined location on the paper sheet traveling along the transport path and the transmitted light of the paper sheet. This is what I did.

Therefore, reflected light and transmitted light of light having different wavelengths can be detected by a predetermined light-receiving element, and in particular, paper sheets printed with colors can be clearly distinguished, and , it is possible to improve the detection accuracy by the light receiving element.

〔Example〕

The present invention will be explained in detail below with reference to FIGS. 1 and 2. FIG. 1 is an explanatory diagram of an embodiment of the present invention, in which a is a plan view, b is a side view, and FIG. a
A sectional view taken along line A-A', and d is a perspective view. The same reference numerals indicate the same objects throughout the figures.

As shown in FIG. 1 a, b, both side walls 1A, 1
The shaft 3, which is rotatably held by a bearing 5 fixed to the shaft 3, is provided with rollers R, and the rollers R are brought into contact with each other through the through holes 2' of the guide plates 2A and 2B, which form a transfer path. A belt B is stretched around a pulley 4 fixed to a shaft 3, and is rotated by the drive of the belt B.

Further, metal fittings 6 and 7 are fixed to the guide plates 2A and 2B, and light emitting elements L1 to L1 to the metal fittings 6 and 7 are respectively fixed to the guide plates 2A and 2B.
L7 and the light receiving elements P1 to P7 are provided to face each other with a transparent glass 8 interposed therebetween.

Further, light emitting/receiving pairs H1 to H4 are provided in the central portions of the guide plates 2A and 2B.

Thereupon, the banknotes are fed into the transfer path formed by the interval between the guide plates 2A and 2B in the direction of arrow A, and are discharged in the direction of arrow B.

In this case, the light-receiving elements P1 and P2 facing the light-emitting elements L1 and L2 detect the tip end face of the inserted banknote to confirm the insertion of the banknote and the insertion angle.

Further, the light-emitting and light-receiving pairs H1 to H4 are located on the front and back sides of the banknotes, and read the printed pattern of a predetermined width of the banknotes passing through them.

Therefore, the bill is configured so that it can be read regardless of whether the bill is inserted on the front or back side.

A light receiving element P3 facing the light emitting elements L3 and L5,
At P5, the width of the banknote is detected, and the light emitting elements L3 to L7
The length of the banknote is detected by the light receiving elements P3 to P7 facing the.

In this case, the distance L between the light emitting elements L3 to L5 and L6, L7 is made shorter than the length of the banknote, and the light receiver P
3 and P6 or P5 and P6 are shielded from light at the same time, so that the length of the banknote can be detected.

Further, the light emitting/receiving pairs H1 to H4 are constructed as shown in FIG.

As shown in FIG. 2a, the holder 11 made of an insulating material such as alloy resin has a light emitting element L
10, L11 and the light receiving element P10, or the light emitting elements L20, L21 and the light receiving element P11 are respectively attached, and are fixed to the guide plates 2A, 2B by the metal fittings 13, and the light receiving element P10 is fixed to the guide plates 2A, 2B with the metal fittings 13. The light emitting elements L20 and L21 are connected to the light receiving element P11, and the light emitting elements L10 and L11 are connected to the transparent glass 1.
They are configured to face each other via 2.

Further, the light emitting elements L10 and L11 and L20 and L21 are arranged side by side as shown in c, and are formed so that they each emit light of different wavelengths and their blinking timings are staggered.

Therefore, when the sheet of paper 10 is inserted in the direction of arrow A, the light receiving element P11 transmits the transmitted light from the light emitting elements L10 and L11 through the through hole 11A to the light emitting element L.
20 and the reflected light from L21 can be detected.

On the other hand, the light receiving element P10 is connected to the light emitting elements L20 and L2.
1 and reflected light from the light emitting elements L10 and L11 can be detected.

Therefore, by sequentially irradiating the printed pattern of the banknote 10 with irradiation light of different wavelengths, if the printed pattern has a color,
The difference in the detection levels detected by the light receiving elements P10 and P11 increases depending on the color, and clear detection can be performed.

For example, if a banknote is printed in blue or green, irradiation light of different wavelengths such as blue, green, yellow, red, or infrared light is sequentially irradiated on a predetermined location, and the Light receiving element P10,
When the output of P11 is detected, a large difference is obtained in the detection level, and even subtle color differences can be accurately determined.

Moreover, such light emitting elements L10, L11, L
20, L21 to shift the blinking timing of each light emitting element L10, L11, L2.
This can be easily done by shifting the phase of the supply of lighting power sent to the terminals P10, L21 using a switching circuit or the like, and also detecting the detection signal by the light receiving elements P10, P11 by synchronizing with the phase shift. It can be configured to do this.

Furthermore, in such a configuration, the light receiving elements P10,
P11 is a light emitting element L10, L11, L20, L2
Since the irradiation light of 1 is received all at once, the general
Compared to a one-to-one combination of a light-emitting element and a light-receiving element, it is not affected by differences in the characteristics of the light-receiving elements, eliminating detection errors caused by differences in the characteristics of the light-receiving elements, allowing for highly accurate detection. There are advantages.

In addition, the transparent glass 12 is fixed to the holder 11 and protrudes so as to be almost flush with the transfer path formed by the guide plates 2A and 2B, so that when the banknote 10 passes through the transfer path, it collects dust etc. This has the effect of removing dirt from the sliding surface of the transparent glass 12, prevents attenuation of the amount of light during transmission or reflection due to dirt, maintains a stable amount of light for a long period of time, and improves the characteristics of the amount of light upon reception. deterioration can be prevented.

Further, when the transparent glass 12 becomes dirty, it can be taken out by removing the metal fittings 13, and is designed to be easily cleaned.

Therefore, as shown in b and d, long holes 13' and 13'' are provided in the metal fitting 13, and the guide plate 2
A, 2B are fixed to the holder 1 through the elongated hole 13''.
1 is fixed through the elongated hole 13' and the mounting hole 11' using setscrews 14, respectively.

Therefore, by shifting the locking positions of the elongated holes 13' and 13'', the light emitting elements L10, L11, L20, L2
It is possible to adjust the facing positions of the photodetector 1 and the light receiving elements P10 and P11.

〔Effect of the invention〕

As explained above, according to the present invention, by arranging the light-emitting light-receiving pair so as to face each other via the transfer path, the light emitting elements provided in the light-emitting light-receiving pair can irradiate irradiation light with different wavelengths. The reflected light and the transmitted light can be detected by the light receiving element provided in the light emitting/receiving pair.

Therefore, it is possible to clearly distinguish the color of the printed pattern at a predetermined location on paper sheets such as banknotes, and when magnetic ink is not applied, the identification performance for paper sheets can be improved, and the practical effect is It's large.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, in which a is a plan view, b is a side view, and Fig. 2 is an explanatory diagram of main parts of the present invention, a is a side view, and b is a plan view. Figure, c is a
A-A' sectional view, d shows a perspective view. In the figure, 1A and 1B are side walls, 2A and 2B are guide plates, 3 is a shaft, 5 is a bearing, and 6, 7, 1
3 is metal fittings, 8 and 12 are transparent glass, 10 is banknotes,
Reference numeral 11 indicates a holder, and reference numeral 14 indicates a set screw.

Claims (1)

[Scope of Claims] 1. A transport mechanism that transports paper sheets in a predetermined direction by being guided by a transport path, a light emitting element that illuminates the paper sheets,
A paper sheet identification device that includes a light receiving element that receives reflected light and transmitted light of the paper sheet due to the irradiation light of the light emitting element, and that discriminates the paper sheet based on a detection signal of the light receiving element, comprising: A plurality of the light emitting elements emitting different lights and the light receiving element are provided in each of the radial through holes formed in a predetermined holder to constitute a light emitting light receiving pair, and the two sets of the light emitting light receiving pairs are A pair of paper sheets arranged so as to face each other across the transfer path so that the light emitting/receiving pair arranged on one side of the transfer path can commonly detect reflected light at a predetermined location on the paper sheet. What is claimed is: 1. A paper sheet identification device characterized in that the detection is performed using one light receiving element, and another light receiving element that shares the detection of transmitted light at the predetermined location by the two opposing light emitting and receiving pairs.