JP2006350764A - Paper sheet discrimination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently discriminate the genuineness with high accuracy by reading the unevenness of a print part (printing) printed on a paper sheet by deep intaglio printing. <P>SOLUTION: A cantilever provided so as to be contact with the front face or rear face of a paper sheet, a detecting means for detecting a fluctuation amount when the paper sheet is moved or the cantilever is moved, a collating means for collating the detected fluctuation amount with a prestored fluctuation amount based on a genuine paper sheet, and a discriminating means for discriminating the paper sheet inserted into a main body of this paper sheet discrimination device as genuineness when the collation matches up and for discriminating the paper sheet as ungenuineness when the collation does not match up discriminate the genuineness/ungenuineness of the paper sheet on which a prescribed content, such as a prescribed character and figure at a prescribed position or a prescribed range on the front or rear face by the deep intaglio printing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper sheet identification device, and in particular, detects the printing irregularities of predetermined characters and figures printed on the front or back surface of a paper sheet by a deep intaglio printing method, and authenticates the paper sheet. It relates to what can be identified.

  Conventionally, as one method of identifying (discriminating) the authenticity of paper sheets such as banknotes and stock certificates, a predetermined character or graphic printed on the front or back surface of a paper sheet by a deep intaglio printing method is used. It is known that printing unevenness is detected, and a paper sheet identification device using this technique has also been proposed (see Patent Document 1).

  That is, as shown in FIG. 6 (a), the surface of the paper sheet a is printed with a predetermined content consisting of predetermined characters, pictures, etc. by a deep intaglio printing method, and a part of the printed portion. Is enlarged on the AA line cross section and shown in (a ′), the printed portion a ′ is formed so as to protrude from the surface of the paper sheet a. In addition, the back side of the paper sheet a is printed with the contents including predetermined characters and pictures by the deep intaglio printing method, and a part of the printed portion is enlarged in the BB line cross section (b ') , The printed portion a ′ is formed so as to protrude from the surface of the paper sheet a.

  As described above, characters and the like are printed on the front and back surfaces of the paper so as to protrude from the surface of the paper by the deep intaglio printing method. The state is detected by the fluctuation amount of the roller rotating on the sheet surface. Then, the detected fluctuation amount is collated with the fluctuation amount of the genuine paper sheet, and the authenticity of the paper sheet is determined.

JP 2003-248852 A

  By the way, since a commercially available printing machine (printer) has recently been improved in performance, a paper sheet identification device capable of identifying a paper sheet with high accuracy has been awaited. In other words, the irregularities of the printed part of the illegal paper sheet and the irregularities of the printed part of the genuine paper sheet are slightly different, and the advent of a paper sheet identification device that can distinguish this with high accuracy was awaited. It was.

  Therefore, in order to meet the above-mentioned demands, the present inventors have conducted intensive research, as a result, for example, a signal pickup device and various precision measurements of a rotary recording medium reproducing device as disclosed in Japanese Patent Application Laid-Open No. 57-30101. By applying a cantilever used as a detector of a device or the like, it has been found that the irregularities on the surface of the paper sheet can be accurately detected, and the paper sheet identification device according to the present invention has been provided.

The paper sheet identification apparatus according to the present invention responds to the above-mentioned demand, and the invention according to claim 1 is characterized in that predetermined characters, figures, etc. are formed by a deep intaglio printing method at a predetermined position or a predetermined range on the front or back surface. A paper sheet identification device for identifying the authenticity of a paper sheet on which a predetermined content is printed, wherein the cantilever provided to contact the front surface or the back surface of the paper sheet, and the paper sheet A detection unit that detects a fluctuation amount when the cantilever moves or when the cantilever moves; a collation unit that collates the detected movement amount with a fluctuation amount based on a genuine sheet stored in advance; And a discriminating means for discriminating that the paper fed into the main body of the paper discriminating apparatus is genuine and discriminating that the paper is illegal when the collation does not match.
In the paper sheet identification apparatus according to claim 2 of the present invention, the detection unit detects the amount of fluctuation by providing a mirror surface on the cantilever and irradiating the mirror surface with a light beam from a predetermined position. The reflected light reflected by the reflected light is received by a light receiver, and a change in the light receiving position in the light receiver is detected.
The paper sheet identification apparatus according to claim 3 of the present invention is characterized in that the detection of the fluctuation amount of the detection means performs the fluctuation of the cantilever using electromagnetic induction.
The paper sheet identification apparatus according to claim 4 of the present invention is characterized in that the detection of the fluctuation amount of the detection means is performed by using a piezoelectric element to change the cantilever.
The paper sheet identification apparatus according to claim 5 of the present invention is characterized in that the cantilever is provided so as to contact a paper sheet positioned on a substrate having a flat surface.
According to a sixth aspect of the present invention, there is provided the paper sheet identification device, comprising a type input direction discriminating means for detecting the type and input direction of the paper sheets input to the main body of the paper sheet identification device. It is said.
In the paper sheet identification apparatus according to claim 7 of the present invention, the determination by the type input direction determination means reads magnetic data recorded on a paper sheet input to a main body of the paper sheet identification apparatus. Or the paper sheet is optically read.

According to a first aspect of the present invention, there is provided a paper sheet identification apparatus for paper sheets on which predetermined contents such as predetermined characters and figures are printed at a predetermined position or a predetermined range on the front or back surface by a deep intaglio printing method. This is a paper sheet identification device that identifies authenticity, and detects the amount of fluctuation when the paper sheet moves or the cantilever moves, and the cantilever provided to contact the front or back surface of the paper sheet. A detecting unit, a collating unit that collates the detected movement amount with a fluctuation amount based on a genuine paper sheet stored in advance, and a paper sheet that is input to the main body of the paper sheet identifying device when the collation coincides Since it consists of an identification means that identifies the class as authentic and identifies the paper sheet as illegal when the collation does not match, it is possible to detect irregularities formed by printing on the front or back surface of the paper sheet with high accuracy , Can improve the identification accuracy of paper sheets .
In the paper sheet identification apparatus according to claim 2 of the present invention, the detection means detects the amount of fluctuation by providing a mirror surface on the cantilever and irradiating the mirror surface with a light beam from a predetermined position. The reflected light reflected by the mirror surface is received by the light receiver, and the change in the light receiving position at the light receiver is detected, so the uneven state formed on the front or back surface of the paper sheet is increased. It can be detected with accuracy.
In the paper sheet identification apparatus according to claim 3 of the present invention, since the variation amount of the detection means is detected using electromagnetic induction, the variation of the cantilever is formed on the front surface or the back surface of the paper sheet. It is possible to easily detect the uneven state.
The paper sheet identification device according to claim 4 of the present invention is formed on the front surface or the back surface of the paper sheet because the variation amount of the detection means is detected by using the piezoelectric element to vary the cantilever. The uneven state can be easily detected.
The paper sheet identification apparatus according to claim 5 of the present invention is formed on the front surface or the back surface of the paper sheet because the cantilever is provided so as to contact the paper sheet positioned on the substrate having a flat surface. It is possible to stably detect the unevenness.
The paper sheet identification apparatus according to claim 6 of the present invention is provided with the type input direction discriminating means for detecting the type and input direction of the paper sheet input to the main body of the paper sheet identification apparatus. It is possible to easily detect the concavo-convex state formed on the paper sheet by detecting the type and direction of insertion.
The paper sheet identification device according to claim 7 of the present invention reads the magnetic data recorded in the paper sheet input to the main body of the paper sheet identification device, the determination in the type input direction determination means, Alternatively, since the paper sheet is optically read, it is possible to easily detect the type and input direction of the paper sheet.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a paper sheet identification device according to the present invention, and a main body (hereinafter referred to as “device main body”) 1 of the paper sheet identification device includes the above-described FIG. A loading port 2 for loading the paper sheet a shown in (b) is provided. The device body 1 can be a single device for identifying (discriminating) the authenticity of the paper sheet a, and a station that accepts and processes paper sheets such as an automatic ticket vending machine and an automatic payment machine. It can also be incorporated in financial institutions such as business equipment and ATMs.

  In FIG. 1A, reference numeral 3 denotes a conveyance path, which is a known conveyance path constituted by a combination of a plurality of rollers or a pair of endless belts. The class a is configured to be taken into the apparatus main body 1. In this conveyance path 3, when it is detected by a sensor such as a photosensor (not shown) that the paper sheet a has been introduced into the insertion slot 2, a motor (not shown) is driven to operate the conveyance path 3, and the paper The leaves a can be transported at a predetermined transport speed (for example, 1 m / sec). The motor of the conveyance path 3 is constituted by a pulse motor, and the conveyance position of the paper sheet a is accurately grasped by the number of pulses of the pulse motor. The transport position of the paper sheet a on the transport path 3 may be detected by arranging a number of photo sensors along the transport direction of the transport path 3.

  In FIG. 1A, reference numerals 4a and 4b denote magnetic heads which are provided on the upstream side of the conveyance path 3, that is, on the inlet 2 side of the conveyance path 3. Of these magnetic heads 4 a and 4 b, the magnetic head 4 a is provided so as to be in sliding contact with the upper surface side of the paper sheet “a” conveyed in the conveying path 3, and the magnetic head 4 b is a paper conveyed in the conveying path 3. It is provided in sliding contact with the lower surface side of the leaf a. In the example shown in the figure, the magnetic heads 4a and 4b are provided so as to face each other. You may make it press on head 4a, 4b, respectively.

  In FIG. 1A, reference numeral 5 denotes a substrate, the upper surface located on the conveyance path 3 side is formed flat, and the upper surface is provided so as to be parallel to the conveyance direction of the conveyance path 3. And it is comprised so that it can move in the state in which one surface (front surface or back surface) of the paper sheet a conveyed by the conveyance path 3 is mounted.

  In FIG. 1A, reference numeral 6 denotes an unevenness detection unit, which is provided above the substrate 5, and details thereof are shown in FIG. The unevenness detector 6 has a cantilever 7. Like the known cantilever, the cantilever 7 has a predetermined length extending so as to be substantially parallel to the upper surface of the substrate 5, and one end side (right end side in the illustrated example) of the lever 7a is a frame (not shown). Is pivotally supported by a support shaft 8 fixed to the shaft. A contact 7b is provided on the other end side.

  The contact 7 b is formed in a needle shape so that the lower end is substantially perpendicular to the upper surface of the substrate 5. In addition, although not shown, a wear-resistant tip such as diamond is provided at the needle-like tip (lower end), that is, the portion that contacts the paper sheet a.

  A mirror surface 9 having a flat upper surface is provided on the upper portion of the contact 7b (the portion on the opposite side to the portion in contact with the paper sheet a). The mirror surface 9 is configured to be irradiated with a beam-like light beam (beam light) having a predetermined incident angle from a light emitter 10 fixed to the frame F and having a predetermined incident angle.

  In FIG. 1B, reference numeral 11 denotes a light receiver, which is fixed at a predetermined position of the frame F where the light beam irradiated from the light emitter 10 is reflected by the mirror surface 9, that is, the reflected light can be received. The light receiver 11 is composed of a well-known CCD sensor, and is configured such that the CCD sensor at the position where the light is received can induce current. The light receiver 11 has a predetermined light receiving area so that all reflected light can be received even if the mirror surface 9 fluctuates because the light receiving position changes depending on the position (fluctuation) of the mirror surface 9.

  In FIG. 1B, reference numeral 12 denotes a spring, which is provided between the lever 7a of the cantilever 7 and the frame F, and is configured so that the contact 7b can always be urged toward the substrate 5 side. ing. Further, in FIG. 1B, a ′ is a printing section, which shows the state of ink formed when a predetermined content is printed on the surface (front surface or back surface) of the paper sheet a by the deep intaglio printing method. Show. In the illustrated example, the printing portion a ′, the thickness of the paper sheet a, and the cantilever 7 (contact 7b) are shown enlarged for easy understanding.

  In FIG. 1 (a), reference numeral 20 denotes a controller. The controller 20 controls the apparatus main body 1 as a whole, and when the apparatus main body 1 is incorporated in a device such as an automatic ticket vending machine. Is configured to be connected via a communication line to a controller mainly composed of a CPU for the device. FIG. 2 is a block diagram showing an electrical configuration of the unevenness detection control unit 20 ′ of the controller 20 corresponding to the unevenness detection unit 6. As shown in FIG.

  The unevenness detection control unit 20 ′ performs a signal processing such as amplification on the signal output from the light receiver (CCD sensor) 11, and the signal output from the signal processing circuit 21 with a predetermined threshold. It has an unevenness detection circuit 22 that detects the thickness (height) of the printing part a ′ printed on the surface (front surface or back surface) of the paper sheet a using the value. The unevenness detection circuit 22 detects the amount of movement of the light receiving position of the light receiver 11 when the contact 7b of the cantilever 7 moves up and down due to the rising of the printing part a ', that is, the amount of fluctuation when the cantilever 7 moves. It is configured to be able to.

  In FIG. 2, reference numeral 23 denotes an identification circuit mainly composed of a CPU, and the type of the paper sheet a and the input port 2 from the type input direction determination unit 24 including the magnetic heads 4 a and 4 b. Is input from the paper sheet a and the information from the transport position detection unit 25 that detects the transport position of the paper sheet a on the transport path 3 based on the drive signal of the motor of the transport path 3 and the like. The unevenness data of the printing section of the genuine paper sheet “a” that is input and stored in the reference value data storage section 26 including a memory is input. In FIG. 2, reference numeral 27 denotes an output circuit, and the identification signal output from the identification circuit 23, that is, the paper sheet a inserted into the insertion slot 2 is a genuine paper sheet or an illegal paper sheet. It is configured so that information on whether it is a leaf can be output to the outside.

  Hereinafter, the control operation of the apparatus main body 1 will be described with reference to the flowchart of FIG. Now, when the paper sheet a is input to the input port 2 (Yes in step 100; hereinafter, “S” is assumed), the paper sheet a is detected by a sensor (not shown) and the conveyance path 3 is driven. Is started and the taking-in of the paper sheet a into the apparatus main body 1 is started.

  When the taking-in of the paper sheet a is started, the paper sheet a is first applied to the front surface (see FIG. 5A) and the back surface (see FIG. 5B) of the paper sheet a by the magnetic heads 4a and 4b. The recorded magnetic data is read. Then, based on the read data, it is determined whether or not the sheet a has been inserted into the insertion slot 2 with the front side up or the back side up (S102). That is, since the magnetic data recorded on the front side of the paper sheet a is different from the magnetic data recorded on the back side thereof, it is recorded on the front side of the paper sheet a by the magnetic head 4a. When the magnetic data read is read and the magnetic data recorded on the back side of the paper sheet a is read by the magnetic head 4b, the paper sheet a inserted into the insertion slot 2 The magnetic head 4a reads the magnetic data recorded on the back side of the paper sheet a, and the magnetic head 4b reads the magnetic data recorded on the front side of the paper sheet a. At that time, it is determined that the paper sheet a that has been input to the input port 2 has been input with the back side up.

  Although not shown in the flowchart of FIG. 3, when the magnetic data recorded on the paper sheet a is not read by the magnetic heads 4a and 4b, or the read magnetic data is recorded on the paper sheet a. If it is different from the magnetic data being received, the paper sheet put into the insertion slot 2 is determined to be an illegal paper sheet, and is reversely conveyed on the conveyance path 3 (conveyance in the direction opposite to the arrow of the conveyance path 3 in FIG. 1). Is discharged to the insertion port 2 and returned. When the input surface of the paper sheet a to the input port 2 is determined using the magnetic heads 4a and 4b, the type and the input direction can be easily determined.

  As a result of the magnetic determination of the paper sheet a that has been input to the input port 2, it is determined that the paper sheet is a genuine paper sheet and whether the paper sheet is front or back, and the transport by the transport path 3 is continued. When the class a reaches the predetermined position, that is, when the transport position of the genuine paper sheet a reaches the position detected by the cantilever 7 (Yes in S104), the detection signal (detection data) from the unevenness detection circuit 22 is detected by the identification circuit 23. It is taken in. Then, in the identification circuit 23, the acquired detection data and the data obtained from the reference value data storage unit 26 are collated, and the true / false state of the paper sheet a is identified (S106).

  The above-described identification process is performed during conveyance of conveying the paper sheet a through the conveyance path 3, and when it is determined that the paper sheet a is genuine (correct ticket) (Yes in S108), conveyance of the conveyance path 3 is performed. It continues as it is (see the arrow of the conveyance path 3 in FIG. 1A) and is stored in a storage safe (not shown) (S110). When the apparatus main body 1 is a single device that only identifies the authenticity of the paper sheet a, the fact that the inserted paper sheet a is authentic is displayed via a display (not shown) and the conveyance path 3 is reversely conveyed and returned to the slot 2.

  On the other hand, when it is determined that the paper sheet a is an illegal paper sheet (No at S108), the transport path 3 is reversely transported, and the paper sheet a is discharged to the input port 2 and returned (S112).

  As described above, the apparatus main body 1 configured as described above determines the input surface of the paper sheet a input into the input port 2 with the magnetic heads 4a and 4b, and the cantilever 7 determines a predetermined portion of the determined input surface. Thus, the unevenness of the printed part a ′ can be detected with high accuracy, so that the authenticity of the paper sheet a can be identified in a short time, efficiently and with high accuracy.

  FIG. 4 shows a concavo-convex detector 6 'that detects the amount of fluctuation of the cantilever 7 using electromagnetic induction. The unevenness detecting portion 6 'is supported by a rod-like movement made of a permanent magnet at the end opposite to the contact 7b, while the substantially central position of the lever 7a of the cantilever 7 is pivotally supported by the support shaft 8. A body 13 is provided. A coil 14 is fixed around the moving body 13 via a support device (not shown) so as not to obstruct the movement of the moving body 13.

  When the contact 7b moves up and down by the printing unit a 'of the paper sheet a, the unevenness detecting unit 6' having the above configuration moves the moving body 13 up and down in the coil 14, so that the moving body 13 is included in the coil 14. An induced current corresponding to the amount of movement occurs. Since the generated induced current corresponds to the fluctuation amount of the cantilever 7, the fluctuation amount corresponding to the movement distance of the cantilever 7 can be detected in the same manner as the unevenness detection unit 6 shown in FIG. .

  5 shows a concavo-convex detection unit 6 ″ that detects a variation amount of the cantilever 7 using a piezoelectric element. This concavo-convex detection unit 6 ″ is similar to FIG. A substantially central position of the lever 7 a is pivotally supported by the support shaft 8, and an end opposite to the contact 7 b is a piezoelectric fixed to the frame F via a pressing spring 15 and a pressing piece 16. It is configured to press the element 17.

  When the contact 7b is moved up and down by the printing part a 'of the paper sheet a, the other end side of the lever 7a (the side opposite to the side where the contact 7b is provided) Since it moves up and down, a stress corresponding to the movement amount of the lever 7a is applied to the piezoelectric element 17, and a voltage corresponding to the stress is generated.This generated voltage corresponds to the fluctuation amount of the cantilever 7. Similar to the unevenness detection units 6 and 6 ′ shown in FIGS. 1A and 4, it is possible to detect a variation corresponding to the moving distance of the cantilever 7.

  In the above-described example, the type of the paper sheet and the input direction (input surface) are determined magnetically using the magnetic head. However, this may be performed optically. When optically discriminating, it is performed by imaging one surface of the paper sheet a with a camera such as a CCD camera and analyzing the image data. Further, this determination may be performed based on the light transmission of the paper sheet, or may be performed based on the reflected light applied to the paper sheet.

(A) is a schematic block diagram of the paper sheet identification device which concerns on one embodiment of this invention, (b) is an enlarged view of an unevenness | corrugation detection part. It is a block diagram which shows the electrical structure of an unevenness | corrugation detection control part. It is a flowchart which shows the control operation of this apparatus main body. It is an enlarged view which shows the other example of an unevenness | corrugation detection part. It is an enlarged view which shows the other example of an unevenness | corrugation detection part. It is a figure for demonstrating the paper sheets by which deep intaglio printing was carried out, (a) is a surface figure of paper sheets, (b) is a back view of paper sheets.

Explanation of symbols

a sheet of paper a 'printing unit 1 apparatus main body 2 slot 3 transport path 4a, 4b magnetic head 5 substrate 6, 6', 6 "unevenness detecting unit 7 cantilever 7a lever 7b contactor 8 support shaft 9 mirror surface 10 light emitter 11 Light receiver 20 Control unit 20 'Concavity and convexity detection control unit 21 Signal processing circuit 22 Concavity and convexity detection circuit 23 Identification circuit 24 Type input direction determination unit 25 Transport position detection unit 26 Reference value data storage unit 27 Output unit

Claims (7)

A paper sheet identification device for identifying the authenticity of a paper sheet on which predetermined contents such as predetermined characters and figures are printed by a deep intaglio printing method at a predetermined position or a predetermined range on the front surface or the back surface,
A cantilever provided to contact the front or back surface of the paper sheet;
Detecting means for detecting a fluctuation amount when the paper sheet is moved or when the cantilever is moved;
Collating means for collating the detected movement amount with the fluctuation amount based on the genuine paper stored in advance;
An identifying means for identifying authenticity of a paper sheet input to the main body of the paper sheet identification device when collation is matched, and identifying the paper sheet as illegal when the collation is mismatched;
A paper sheet identification device comprising: 2. The paper sheet identification apparatus according to claim 1, wherein the detection unit detects the amount of fluctuation by providing a mirror surface on the cantilever and irradiating light from a predetermined position toward the mirror surface. A paper sheet identification device characterized in that reflected light reflected by the mirror surface is received by a light receiver and a change in a light receiving position in the light receiver is detected. 2. The paper sheet identification apparatus according to claim 1, wherein the detection of the variation amount of the detection means is performed by using electromagnetic induction to vary the cantilever. 2. The paper sheet identification apparatus according to claim 1, wherein the detection unit detects the amount of change by using a piezoelectric element to change the cantilever. 5. The paper sheet identifying apparatus according to claim 1, wherein the cantilever is provided so as to contact a paper sheet positioned on a substrate having a flat surface. Identification device. 6. The paper sheet identification apparatus according to claim 1, further comprising a type input direction discriminating unit that detects a type and an input direction of the paper sheet input to a main body of the paper sheet identification apparatus. Paper sheet identification device characterized by this. 7. The paper sheet identification apparatus according to claim 6, wherein the determination by the type input direction determination means is performed by reading magnetic data recorded on a paper sheet input to a main body of the paper sheet identification apparatus, or A paper sheet identification apparatus characterized by optically reading the paper sheet.

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