JPH08180236A - Optical detection part for paper sheet discriminating device - Google Patents

Abstract

PURPOSE: To provide an optical detection part for a paper sheet discriminating device allowed to be arranged on a limited narrow setting space and capable of efficiently sampling optical data from a paper sheet. CONSTITUTION: Two reflection detecting parts 40, 50 each of which is obtained by arranging a light emitting element LS and a light receiving elements LR on each base in parallel are arranged on positions (the upper and lower faces of a carrying passage 3) opposed to each other through the passage 3 so as to detect data for the reflected light quantity and transmitted light quantity from paper money 1 in carrying concerning irradiation light. The optical detection part includes a light emission controlling means (not shown in the figure) for selecting a specific element out of the light emitting elements LS of respective reflection detection parts 40, 50 and controlling its light emission. When light emitting elements LS or light receiving element LR having respectively different light emitting wavelength characteristics and spectral sensitivity characteristics are used, two kinds of transmitted light quantity data can be sampled from the paper money 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical detecting section of a paper sheet identifying apparatus for identifying paper sheets such as banknotes, securities and bonds.

[0002]

2. Description of the Related Art Conventionally, in a bill validator, which is an example of a paper sheet validator, an automatic vending machine or the like equipped with the bill validator is installed outdoors, so that countermeasures against mischief are required. The optical detection unit in this banknote identification device includes a light emitting unit and a light receiving unit. As these components, for example, as shown in FIG. 12, a substrate provided with a light emitting element L _S as a light emitting unit and a light receiving unit. As a transmitted light amount detection type in which a substrate equipped with a light receiving element L _R is disposed so as to face each other with the banknote 1 interposed therebetween, or as shown in FIG. 13, a light emitting element L _S and a light receiving element L _{R are used} as light receiving and emitting parts. Generally, a reflected light amount detection type in which a substrate equipped with the above-mentioned is arranged on one side of the banknote 1 is used. Incidentally, in the transmitted light amount detection type optical detection unit, as shown in FIG. 14, a large substrate provided with a plurality of light emitting elements L _S as a light emitting unit and a large substrate provided with a plurality of light receiving elements L _R as a light receiving unit. There is also a type in which the substrate is provided so as to face each other with the banknote 1 in between.

FIG. 15 is a side view showing the basic construction of a conventional bill discriminating apparatus. This bill validator 1
At 0, the bill 1 inserted from the bill insertion slot is conveyed by a conveyance mechanism having rollers and the like, passes through the conveyance passage 3, and is provided with an optical detection unit (here, in FIG.
After the optical detection by the transmitted light amount detection type shown in FIG. 2 and the light emitting portion and the light receiving portion are arranged on the upper surface and the lower surface of the transport passage 3, respectively, the result is a normal one. If it is determined that the banknote 1 is stored in the banknote storage unit 2, the banknote 1 is sandwiched between the central portions of the apparatus main body. When it is determined that the bill 1 is not authentic based on the detection result of the optical detection unit, the bill 1 is conveyed in the opposite direction by the conveying mechanism and returned to the bill insertion slot.

By the way, in recent years, since the protrusion from the road is regarded as a problem, there is a strong demand for the vending machine to be thin, and the bill validator mounted on the vending machine must be miniaturized. Since it is installed outdoors, in addition to the measures against the above-mentioned mischief, durability measures such as entry of rainwater are also required.

[0005]

In the case of the optical detecting section of the above-described paper sheet discriminating apparatus, in order to improve the detection accuracy of the paper sheet discriminating, more optical data are sampled from the paper sheet. It is desirable that the size of the banknote recognition device installed in an automatic vending machine be reduced, and if the installation space for the drive system, pull-out prevention mechanism, etc. is required, installation for the optical detection unit is required. Space is regulated. Further, in the case of a bill validator for a vending machine, in order to prevent rainwater from entering, it is desirable that the optical detection unit including the electronic circuit be arranged away from the bill insertion opening, so There are also restrictions on the installation location. Therefore, in the case of a bill validator for a vending machine, it is required that optical data can be efficiently sampled from bills and the like with a small-scale configuration, but it is important to install the optical detection unit in a limited space. It has an important meaning to prevent mischievous bills that have been altered by cutting, etc. and mischief caused by pulling out bills.

However, in the optical detection unit having the structure shown in FIG. 14, large-sized substrates must be arranged on both sides of the conveyance path with the banknotes in between, which occupies a large occupied space and is used for vending machines. It is difficult to apply to a bill validator, and Fig. 1
In the optical detection unit having the configuration shown in FIG. 2 or FIG. 13, sufficient optical data cannot be sampled from a paper sheet, and a malfunction such as returning is likely to occur, which causes a problem in detection accuracy.

The present invention has been made to solve such a problem, and its technical problem is to install a paper sheet in a limited narrow installation space and efficiently sample optical data from the paper sheet. An object of the present invention is to provide an optical detection unit of a class identification device.

[0008]

According to the present invention, there is provided an optical detecting section of a paper sheet discriminating apparatus including a light emitting element for emitting irradiation light for irradiating a paper sheet, and a light receiving element for receiving the irradiation light. The light emitting element and the light receiving element are arranged in parallel at positions facing each other with a conveyance path through which the paper sheet is conveyed sandwiched therebetween, and are capable of detecting reflected light and transmitted light relating to irradiation light from the paper sheet being conveyed. The optical detection unit of the paper sheet identification apparatus includes a light emission control unit that controls light emission by selecting a specific one of the light emitting elements of the plurality of reflection detection units. To be

Further, according to the present invention, the light emitting element and the light detecting element of the paper sheet discriminating apparatus including the light emitting element for emitting the irradiation light for irradiating the paper sheet and the light receiving element for receiving the irradiation light are provided. The light receiving elements are arranged in parallel at different positions in the vicinity of the conveying path through which the paper sheets are conveyed to form a plurality of reflection detecting sections. Further, predetermined ones of the plurality of reflection detecting sections are optically coupled to each other. , A light guide member for guiding light emitted by a light emitting element of a specific one of the plurality of reflection detecting sections to a light receiving element of another, and a specific one is selected from the light emitting elements of the plurality of reflection detecting sections to emit light. And a light emission control means for controlling
The plurality of reflection detection units and the light guide member cooperate with each other to obtain the optical detection unit of the paper sheet identification device configured to detect the reflected light and the transmitted light regarding the irradiation light from the paper sheet being conveyed.

In the optical detecting section of these paper sheet identifying apparatuses, the light emitting elements of the plurality of reflection detecting sections have different emission wavelength characteristics, and the light receiving elements of the plurality of reflection detecting sections have different spectral sensitivity characteristics. It is preferable that they are different.

[0011]

In the bill detecting device of the present invention, which is an example of the present invention, in order to efficiently sample optical data from bills with a small-scale structure, the bills are placed at positions facing each other in the vicinity of the feeding passages where bills are fed. Each is composed of a light emitting element and a light receiving element arranged side by side, and a reflection detection unit that can detect reflected light and transmitted light related to irradiation light from a bill being conveyed is arranged, and data of reflected light amount and transmitted light amount at each reflection detection unit. Is being detected. In another example of the optical detection unit, the reflection detection units are optically coupled to each other by a light guide member so that light emitted by a light emitting element of a specific one of the reflection detection units is guided to a light receiving element of another. There is. In this optical detection unit, each reflection detection unit and the light guide member cooperate with each other so that reflected light and transmitted light related to the irradiation light can be detected from the bill. Since the light guide member can be arranged in a narrow installation space or a place where there is a high possibility of electric leakage, the efficiency of the installation space is improved and it also contributes to wire saving. In such an optical detection unit, if elements with different emission wavelength characteristics and spectral sensitivity characteristics are used, it is possible to sample with different optical data of reflected light and transmitted light obtained from the front and back surfaces of the banknote, enabling efficient and highly accurate detection. It can be performed. It should be noted that the same performance can be obtained even in the optical detection unit configured by replacing the reflection detection unit with the reflection sensor having the light emitting element and the light receiving element built therein.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The optical detecting section of the paper sheet discriminating apparatus of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a partial cross-sectional view showing the main structure of an optical detecting section of a bill validator according to an embodiment of the present invention. In this optical detector, the light emitting element L _S and the light receiving element L _R are arranged in parallel on the substrate at positions (both the upper surface and the lower surface of the transport passage 3) facing each other with the transport passage 3 for transporting the banknote 1 interposed therebetween. The two reflection detection units 40 and 50 are formed so that the data of the reflected light amount and the transmitted light amount regarding the irradiation light from each light emitting element L _S can be detected from the bill 1 being conveyed by each reflection detection unit 40 and 50. There is. Further, the optical detecting section includes a light emitting element L _S of each reflection detecting section 40, 50.
A light emission control unit (not shown) for controlling light emission by selecting a specific one from the above is included. Further, in the case of this optical detection unit, four optical data from the banknote 1 transported into the transport path 3 using the same light emission wavelength characteristic and spectral sensitivity characteristic for each light emitting element L _S and each light receiving element L _R Can be sampled.

Incidentally, each of the reflection detecting units 40 and 50 is shown in FIG.
As shown in FIG. 7, instead of the configuration in which the light emitting element L _S and the light receiving element L _R are arranged in parallel, the same configuration can be obtained by using the reflection sensors 4 and 5 in which the light emitting element L _S and the light receiving element L _R are integrated. it can.

FIGS. 3A to 3F are timing charts showing the detection operation by the optical detection section described in FIG. 1 (however, here, not at the time of actual banknote detection,
It shows the timing at the time of non-banknote detection in each optical element).

Here, the light emission control means is the reflection detecting section 40.
When the light emission of the first light emitting element L _S is selectively controlled,
When the irradiation light is emitted from the light emitting element L _S of FIG. 3A in a cycle as shown in FIG. 3A, the first light receiving element L of the reflection detecting section 40 is correspondingly shown as shown in FIG. 3C. with light reflected from the bill 1 is detected received by the _R, transmitted light from the bill 1 in the second light receiving element L _R of the reflection detection unit 50 as shown in FIG. 3 (f) are detected received. Next, when the light emission control unit selectively controls the light emission of the second light emitting element L _S of the reflection detection unit 50, the irradiation light is emitted from the second light emitting element L _{S in} a cycle as shown in FIG. 3B. Then, in response to this, FIG.
As shown in (d), the first light receiving element L of the reflection detector 40
The transmitted light from the bill 1 is received and detected by _R , and as shown in FIG.
As shown in (e), the second light receiving element L of the reflection detecting section 50.
_{At R} , the reflected light from the bill 1 is received and detected. This operation is alternately repeated in this optical detector.

By repeating the switching by the light emission control means in this manner, the reflected light and the transmitted light of the irradiation light with which the bill 1 is irradiated are detected. Since each light emitting element L _S and each light receiving element L _R have the same emission wavelength and spectral sensitivity, the data regarding the amount of transmitted light received and detected by each light receiving element L _R is the detection time difference or the inter-element data. There is a slight difference in characteristics due to
Since these difference values are extremely small, the detected amounts are almost the same.

By the way, in order to further improve the detection accuracy of the discrimination, two light receiving elements having the same amount of transmitted light are used by using light emitting elements L _S and light receiving elements L _R having different emission wavelength characteristics and spectral sensitivity characteristics. The data of two different types of transmitted light may be sampled by using the absorption difference due to the wavelength of the printing portion of the banknote 1 instead of detecting by L _R.

FIG. 4 shows the basic construction of the optical detecting section of the bill validator according to another embodiment of the present invention. In this optical detection unit, the reflection detection units 40 and 50 are optically coupled to each other by the optical fiber 6 serving as a light guide member, and the light emitted by the light emitting element L _S of a specific one of the reflection detection units 40 and 50 is irradiated. Is led to the light receiving element L _R of another,
The reflection detection units 40 and 50 and the optical fiber 6 cooperate to detect the reflected light and the transmitted light related to the irradiation light from the banknote 1. Here, each reflection detection unit 40, 50
Are attached to the same substrate and are arranged at different positions on one side in the vicinity of the transport passage 3, and the optical fiber 6 is arranged at a position on the other side facing the one side in the vicinity of the transport passage 3. Also here, a light emission control means for controlling light emission by selecting a specific one from the light emitting elements L _S of the reflection detection sections 40 and 50 is provided. This light emission control means is a light emission control unit 11 connected to the light emitting element L _S of each reflection detection unit 40, 50.
And A / D converters 12 and 13 connected to the light receiving elements L _R of the reflection detectors 40 and 50, respectively, and various data including data on reflected light and transmitted light connected to these units. CPU14 for this and this CPU1
Memory 15 storing information necessary for data processing according to No. 4
It is composed of the combined functions of and.

In this optical detector, each reflection detector 40, 5
Each of the light emitting elements L _{S at} 0 is selectively controlled to emit light on the basis of an instruction from the CPU 14. Therefore, according to an instruction from the CPU 14, the first of the reflection detection units 40 is transmitted through the light emission control unit 11.
Selecting control light emission element L _S of the first light-emitting element L _S
The light energy of the irradiation light emitted from the banknote 1 is being conveyed.
Is partially absorbed and the other part is reflected and the rest is transmitted and passes through the optical fiber 6. At this time, the first light receiving element L _R receives and detects the reflected light amount as the first bill data, and In the second light receiving element L _R of the reflection detection unit 50, the amount of transmitted light transmitted from the end A to the end B in the optical fiber 6 and transmitted again through the banknote 1 is received and detected as the second banknote data. It In this way, the second portion of the reflection detection unit 50
In the light emitting element L _R , the optical data regarding the amount of transmitted light that passes through the bill 1 at two locations is sampled.

Next, when the CPU 14 selectively controls the second light emitting element L _S of the reflection detecting section 50 through the light emission control section 11, the light energy of the irradiation light emitted from the second light emitting element L _S is being conveyed. The bill 1 is partially absorbed, the other part is reflected, and the rest is transmitted and passes through the optical fiber 6. At this time, the reflected light amount is received and detected as the third bill data by the second light receiving element L _R. At the same time, in the first light receiving element L _R of the reflection detection unit 40, the amount of transmitted light, which is the transmitted light transmitted from the end portion B to the end portion A in the optical fiber 6 and transmitted through the bill 1 again, is received as the second bill data. To be detected. In this way, the first light emitting element L _R of the reflection detection unit 40 samples optical data relating to the amount of transmitted light that passes through the banknote 1 at two locations.

In this embodiment, as the optical waveguide member, 1
Although the optical fibers 6 are used to optically couple the reflection detecting units 40 and 50, instead of this, as shown in FIG. 5, the first light emitting element L _S and the reflection detecting unit 40 of the reflection detecting unit 40 are reflected. The second light receiving element L _R of the detecting unit 50 and the second light receiving element of the reflection detecting unit 50
Light emitting element L _S and the first light receiving element L of the reflection detection unit 40
_R and _R may be optically coupled by using two optical fibers 6a and 6b. However, here, both ends of each of the optical fibers 6a and 6b are arranged on the extension lines of the optical axes of the light emitting element L _S and the light receiving element L _R , respectively. As a measure against the misalignment of the optical axes, a condenser lens or the like may be provided at the light entering portion of each of the optical fibers 6a and 6b.
Further, in each of the embodiments using the light guide member, the case where the light emitting elements L _S and the light receiving elements L _R having the same emission wavelength characteristics and spectral sensitivity characteristics are used has been described. In order to further improve the accuracy, it is possible to adopt a configuration in which each light emitting element L _S or each light receiving element L _R having different emission wavelength characteristics and spectral sensitivity characteristics is used to sample data of two different kinds of transmitted light amounts. As an example,
The light emission wavelength of each light emitting element L _S is 900 to 1000
Select a large range of devices than [nm], with the peak spectral sensitivity as the first light receiving element L _R is used photodiode 900 nm, the peak spectral sensitivity as a second light receiving element L _R is a 1000nm photo diode There is a case where the identification accuracy is improved by using the difference in absorption coefficient depending on the wavelength of the printing portion of the banknote 1.

FIG. 6 is a perspective view showing a configuration of a main part of the optical detecting section shown in FIG. 4 when the reflection detecting sections 40 and 50 are arranged separately from each other. Here, the width Wy in the width direction of each reflection detection unit 40, 50 is smaller than the width dimension of the banknote 1 during transportation, and the space Wx in each reflection detection unit 40, 50 that matches the transportation direction S is the time of transportation. An example is shown that is smaller than the longitudinal dimension of the banknote 1.

According to this optical detecting unit, the bill 1 during transportation
When the amount of transmitted light is sequentially sampled, a detection area as shown in FIG. 7 is formed on the banknote 1. That is, immediately after the conveyed banknote 1 reaches the reflection detection unit 40, the change in the transmitted light amount and the reflected light amount in the detection area E1 is sampled, and when the banknote 1 reaches the reflection detection unit 50, it is detected in both the detection areas E2 and E3. The amount of transmitted light that is absorbed and combined, the amount of reflected light of the detection region E2, and the amount of reflected light of the detection region E3 are detected. Subsequently, the subsequent detection from the position where the rear end of the conveyed banknote 1 has passed the reflection detection unit 40 is a change in the transmitted light amount of the detection region E4 and the reflected light amount of the detection region E4.

FIG. 8 shows the pattern DX of the bill data detected by the optical detecting section in the relation between the movement amount M and the detection regions E1 to E4 with the passage of time when the bill 1 is conveyed. However, regarding the movement amount M here, M
1 is when the banknote 1 reaches the reflection detecting section 40, M2 is when the banknote 1 reaches the reflection detecting section 50, M3 is when the banknote 1 passes through the reflection detecting section 40, and M4 is the banknote 1 when the reflection detecting section 40. Shown when passing 50. Also in this optical detection unit, the first to fourth bill data D1 as described above
Although the data about the amount of reflected light from the banknote 1 in the detection area E1 and the detection area E2 is obtained as the first banknote data D1, the second banknote data D2 is the amount of transmitted light in the detection area E1. The data, the data regarding the combined transmitted light amount in the detection region E2 and the detection region E3, and the data regarding the transmitted light amount in the detection region E4 are continuously obtained. Further, as the third bill data D3, data of the reflected light amount of the bill 1 in the detection region E3 and the detection region E4 is obtained, and as the fourth bill data D4, the data of the transmitted light amount in the detection region E1 and the detection region E4.
2 and the data of the combined transmitted light amount in the detection area E3,
Data on the amount of transmitted light in the detection area E4 is continuously obtained.

By the way, in the second bill data D2 and the fourth bill data D4, if the light emitting elements L _S are selected as those having different wavelengths, data of different transmitted light amounts can be obtained from the bill 1. In the case of the conventional reflected light amount detection type optical detection unit, since only two types of the first banknote data D1 and the third banknote data D3 can be obtained, comparing both,
Since the number of samplings of the optical data is increased in this optical detector, the effect of improving the detection accuracy is great. In the case of this embodiment, the combined amount of transmitted light is obtained in the detection area E2 and the detection area E3, but if the distance between the reflection detection portions 40 and 50 is made equal to or more than the longitudinal dimension of the bill 1 during conveyance. Data on the amount of transmitted light that is not combined can be obtained.

By the way, as shown in FIG. 15, the bill validator for a vending machine is generally long and has a structure capable of opening the transport passage 3 as a reaction when a bill 1 is jammed. In order to prevent rainwater and the like from entering, the rear part of the insertion slot for the banknotes 1 in the transfer passage 3 has a structure in which the banknotes 1 can be temporarily transferred to the upper part and changed in direction to be stored in the lower banknote storage part 2. Has become. Further, in the case of such a bill discriminating apparatus, as shown in FIG. 15, a bill driving unit 7 including a belt for conveying the bill 1 near the center is sandwiched in the main body. That is, the transport passage 3 is provided in the gap between the bill drive unit 7 and the main body, and the bill drive unit 7 is connected to the passage unit 3 a of the transport passage 3,
It is arranged so as to be sandwiched between 3b.

Here, in the case of providing the optical detecting section, conventionally, the light-emitting element L _S and the light-receiving element L _R are arranged inside the banknote driving section 7 and on the main body side outside the transport passage 3, and inside the narrow banknote driving section 7. In addition, it was necessary to provide either a light emitting portion or a light receiving portion formed by attaching an element to the substrate, but in the present invention, the reflection detecting portions 40 and 50 are arranged outside the bill passage as shown in FIG. The optical fiber 6c is provided inside the transport passage 3 sandwiched between the passages.
The cross section of the optical portion of FIG. 9 in which the plurality of reflection detecting portions 40 and 40 'are arranged side by side on the main body outside the passage portions 3a and 3b of the conveying passage 3 is shown in FIG. And a separate substrate on which a pair of reflection detection units 50 and 50 'are provided side by side, and two optical fibers 6c and 6d are provided in the banknote drive unit 7 in which belts 8 and 9 are provided at both ends. As a result, each reflection detection unit 40, 50 and each reflection detection unit 40
It suffices to dispose an optical detection unit having a configuration in which ′ and 50 ′ are optically coupled by the respective optical fibers 6c and 6d.

That is, here, each reflection detecting section 40, 40 '
And the reflection detectors 50 and 50 'are arranged side by side at different positions on the outside of the passage portions 3a and 3b of the transport passage 3 facing each other.

In the case of this optical detector, each reflection detector 4
When the banknote 1 is conveyed to one passage portion 3a on the 0, 40 'side and the other passage portion 3b on each reflection detecting portion 50, 50' side
When the banknote 1 is conveyed, the scanning position of the banknote 1 in which the transmitted light amount is detected changes, and data of different transmitted light amounts depending on the two scanning positions can be detected. As a result, the number of samplings of optical data is increased as compared with the conventional case, and excellent detection is possible.

In addition to this, for example, as shown in FIG. 11, one of the passage portions 3a and 3b of the conveying passage 3 is provided.
A substrate in which the reflection detection units 40 and 50 are arranged side by side is provided, and the three optical fibers 6c, 6d, and 6e are combined and arranged so as to extend inside the banknote drive unit 7 and outside the other passage unit 3b. As a result, it is possible to dispose an optical detection unit having a configuration in which the reflection detection units 40 and 50 are optically coupled by the optical fibers 6c, 6d and 6e.

In this optical detector, three optical fibers 6
By using c, 6d, and 6e, the number of substrates can be reduced as compared with that of FIG.

In any of the above-described optical detecting sections, the light emitting element L _S and the light receiving element L _{R of} each reflection detecting section are included.
It is possible to use those having different emission wavelength characteristics and spectral sensitivity characteristics. Further, by using a reflection sensor in which the light emitting element L _S and the light receiving element L _R are integrated instead of each reflection detecting section, a completely equivalent optical detecting section can be configured. Furthermore, regarding any of the optical detection units described above,
The number of the light emitting elements L _S and the light receiving elements L _R in each reflection detection unit is not limited to one each, and may be two or more. In addition, with respect to any of the optical detection units described above, various modifications are possible depending on the form of the transport passage, and further, it is applicable to paper sheet identification devices other than the bill identification device,
The paper sheet identification apparatus of the present invention is not limited to the configuration described in each embodiment.

[0034]

As described above, according to the optical detecting section of the paper sheet discriminating apparatus of the present invention, the light emitting element and the light receiving element are located at positions facing each other with the conveying path for conveying the paper sheet interposed therebetween. Are arranged side by side, or each reflection detecting section is arranged in the vicinity of the conveying path and each reflection detecting section is optically coupled by a light guide member to each reflection detecting section. Since it is possible to detect the reflected light amount and transmitted light amount data related to the irradiation light from the paper sheets being conveyed, it can be installed in a limited small installation space with a small scale, and it can efficiently copy a large number of paper sheets. The optical data can be sampled, and as a result, the detection accuracy of the optical detector is improved.

Further, in particular, by making the emission wavelength characteristic and the spectral sensitivity characteristic of the light emitting element and the light receiving element of each reflection detecting section different, it becomes possible to detect various kinds of different optical data, and the detection accuracy of identification is improved. Is further improved.

Further, in the optical detecting section configured for the paper sheet discriminating apparatus in which the paper sheet driving section is provided between the passage portions of the conveying passage, the reflection detecting portions are arranged at different positions outside the passage portion. Since the light guide member is arranged in the paper sheet drive unit, it is not necessary to provide a substrate included in the light emitting unit or the light receiving unit in the paper sheet drive unit as in the related art. This optical detection unit has various advantages especially when it is applied to a bill validator of a vending machine. For example, in the case of a bill validator for a vending machine, there is a bill drive unit near the center,
Since a light guide member is provided instead of disposing the substrate in the bill driving unit, and the reflection detecting unit including the light emitting element and the light receiving element can be arranged on the bill discriminating apparatus main body side outside the transport passage, as well. The configuration is simple, the installation space is small, and the number of wires can be reduced and the cost can be reduced. In other optical detectors,
Since each reflection detection unit is arranged at a different position on one outer side of the passage portion and a plurality of light guide members are combined and arranged so as to extend inside the bill drive portion and on the other side of the passage portion, By disposing the optical member in a portion where rainwater is likely to enter, the optical member can be separated from the electronic component, so that operational trouble is avoided and reliability is improved.

In addition, with respect to the reflection detecting section in any of the optical detecting sections, the same effect can be obtained even in the optical detecting section constituted by replacing the reflection sensor in which the light emitting element and the light receiving element are integrated, and the assembling is simplified. It also has the advantage that it can be done.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a main configuration of an optical detection section of a bill validator according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a main configuration of an optical detection unit configured by using a reflection sensor in place of the light emitting element and the light receiving element included in the optical detection unit shown in FIG.

3A and 3B are timing charts showing the detection operation by the optical detection unit shown in FIG. 1, in which FIG. 3A shows the irradiation light of the first light emitting element, and FIG. 3B shows the irradiation light of the second light emitting element. (C) relates to reflected light from the bill of the first light receiving element, (d) relates to transmitted light from the bill of the first light receiving element, (e) relates to bill of the second light receiving element. (F) relates to the transmitted light from the bill of the second light receiving element.

FIG. 4 is a diagram showing a basic configuration of an optical detection unit of a bill validator according to another embodiment of the present invention.

5 is a partial cross-sectional view showing a configuration of a main part when the optical detection unit shown in FIG. 4 is modified by using two light guide members.

6 is a perspective view showing a configuration in the case where each reflection detection unit in the optical detection unit shown in FIG. 4 is arranged at a predetermined position included in a conveyance surface for a banknote during conveyance so as to be separated from each other.

FIG. 7 is a diagram showing a detection area of a transmitted light amount regarding a bill during conveyance, which is detected by the optical detection unit shown in FIG. 6;

8 is a diagram showing a pattern of banknote data detected by the optical detection unit shown in FIG.
This is shown in relation to the detection area shown in.

9 is a diagram showing a case in which the optical detection unit having the structure shown in FIG. 4 is modified and provided in a banknote identification device for a vending machine having a structure in which a banknote driving unit is provided between the passage parts of the transport passage. It is the side view which showed the structure.

FIG. 10 is a partial cross-sectional view showing the main configuration of the optical detection section shown in FIG.

FIG. 11 is a partial cross-sectional view showing a configuration in which the main configuration of the optical detection unit shown in FIG. 10 is modified separately.

FIG. 12 is a partial cross-sectional view showing a main part configuration of a transmitted light amount detection type optical detection unit provided in a conventional bill identifying apparatus.

FIG. 13 is a side sectional view showing a main part configuration of an optical detection unit of a reflected light amount detection type, which is provided in a conventional bill identifying apparatus.

FIG. 14 is a partial cross-sectional view showing the configuration of a main part of another transmitted light amount detection type optical detection unit provided in the conventional bill identifying apparatus.

FIG. 15 shows a bill identifying device for a vending machine having a structure in which a bill driving unit is provided between passage portions of a conveying passage.
FIG. 6 is a side view showing a configuration when the optical detection unit shown in FIG.

[Explanation of symbols]

1 bill 2 bill storage part 3 conveyance passage 3a, 3b passage part 4,5 reflection sensor 6, 6a, 6b, 6c, 6d, 6e optical fiber 7 bill drive part 8, 9 belt 10 bill identification device 11 light emission control part 12, 13 A / D converter 14 CPU 15 Memory 40, 50, 40 ', 50' Reflection detector L _S light emitting element L _R light receiving element

Claims (11)

[Claims] 1. An optical detection unit of a paper sheet identification device, comprising: a light emitting element that emits irradiation light for irradiating a paper sheet; and a light receiving element that receives the irradiation light, wherein the light emitting element and the light receiving element are: A plurality of reflection detection units are arranged in parallel at positions facing each other with a conveyance path through which the paper sheets are conveyed, and capable of detecting reflected light and transmitted light relating to the irradiation light from the paper sheets being conveyed. The optical detecting section of the paper sheet discriminating apparatus further includes a light emission control means for controlling a light emission by selecting a specific one of the light emitting elements of the plurality of reflection detecting sections. 2. In an optical detection unit of a paper sheet identification device, which includes a light emitting element that emits irradiation light for irradiating a paper sheet and a light receiving element that receives the irradiation light, the light emitting element and the light receiving element are: A plurality of reflection detection units are arranged side by side at different positions in the vicinity of a conveyance path through which the paper sheets are conveyed, and further, predetermined ones of the plurality of reflection detection units are optically coupled to each other, and A light guide member that guides light emitted by a light emitting element of a specific one of the plurality of reflection detecting sections to a light receiving element of another, and a specific one is selected from the light emitting elements of the plurality of reflection detecting sections to emit light. And a light emission control unit for controlling, wherein the plurality of reflection detection units and the light guide member are configured to cooperate to detect reflected light and transmitted light relating to the irradiation light from the paper sheet being conveyed. Detection unit of paper sheet identification device characterized by . 3. The optical detection unit of the paper sheet identification apparatus according to claim 2, wherein the plurality of reflection detection units are arranged in parallel at different positions on one side in the vicinity of the conveyance path, and the light guide member is the conveyance unit. An optical detection unit of a paper sheet identification apparatus, which is arranged at a position on the other side different from the one side near the passage. 4. The optical detection section of the paper sheet identification device according to claim 2, wherein the conveyance path is formed by sandwiching a paper sheet drive section between path portions extending in parallel with each other, and the plurality of reflection detections. The optical detecting unit of the paper sheet discriminating apparatus is characterized in that the portions are arranged at different positions outside the passage portion, and the light guide member is arranged in the paper sheet driving unit. 5. The optical detecting section of the paper sheet identifying apparatus according to claim 4, wherein the plurality of reflection detecting sections are arranged in parallel at different positions on the outside of the passage section, which are opposed to each other. Optical detection unit of leaf identification device. 6. The optical detection section of the paper sheet identification device according to claim 4, wherein the plurality of reflection detection sections are arranged in parallel at different positions outside a part of the passage section.
The optical detection unit of the paper sheet identification apparatus, wherein a plurality of the light guide members are combined and arranged so as to extend inside the bill drive unit and outside the other portion of the passage unit. 7. The optical detection section of the paper sheet identification device according to claim 2, wherein the light guide member is a specific one of the light emitting elements of the plurality of reflection detection sections. An optical detection unit of a paper sheet identification device, characterized in that the optical detection unit and a specific one of the light receiving elements of the plurality of reflection detection units are optically coupled to each other. 8. The optical detecting section of the paper sheet identifying apparatus according to claim 1, wherein the light emitting elements of the plurality of reflection detecting sections have different emission wavelength characteristics. Optical detection unit of leaf identification device. 9. The optical detection unit of the paper sheet identification device according to claim 1, wherein the light receiving elements of the plurality of reflection detection units have different spectral sensitivity characteristics. Optical detection unit of leaf identification device. 10. The optical detection unit of the paper sheet identification device according to claim 1, wherein the light emitting elements of the plurality of reflection detection units have different emission wavelength characteristics, and the plurality of reflection detection units are provided. The optical detection section of the paper sheet identification device, wherein the light receiving elements of the respective sections have different spectral sensitivity characteristics. 11. The optical detection section of the paper sheet identification apparatus according to claim 1, wherein a reflection sensor including the light emitting element and the light receiving element is provided in the plurality of reflection detection sections. An optical detection unit of a paper sheet identification device characterized by being used.