JP2015105846A - Checkup apparatus for sheet-shaped objects - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a checkup apparatus for sheet-shaped objects that enables in a reduced space at a reduced cost checkup of picture parts printed with ordinary ink and picture parts printed with ink having an infrared component to be accomplished.SOLUTION: A checkup apparatus 40 comprises white LED lighting fixtures 41a1, 41a2, 41b1 and 41b2; IR-LED lighting fixtures 43a and 43b; visualizing color cameras 42A and 42B, an IR monochrome camera 44 disposed in a position not in the fields of view of the cameras 42A and 42B; supporting frames 49a and 49b that support the lighting fixtures 41a1, 41a2, 41b1, 41b2, 43a and 43b; an IR filter 45 that allows only infrared rays to come into incidence on the camera 44; and a control device 46 that determines with visible light rays having come into incidence on the cameras 42A and 42B whether a picture part printed on paper W with ordinary ink is appropriate or not and determines with infrared rays having come into incidence on the camera 44 whether a picture part printed on the paper W with ink having an infrared component is appropriate or not.

Description

  The present invention relates to an inspection apparatus for a sheet-like material including a pattern portion printed with normal ink and a pattern portion printed with ink containing an infrared component.

  Conventionally, this type of inspection apparatus is disclosed in Patent Document 1 by the present applicant.

  This is because the sheet-like material holding device that is provided on the endless conveyance body and holds the end of the sheet-like material, and inside the loop formed by the movement locus on a part of the movement locus of the sheet-like material holding device. And a plurality of inspection devices provided inside the loop of the arcuate locus part, and a guide provided outside the loop of the arcuate locus part. The sheet-like object is inspected by the plurality of inspection devices while being guided by the guide while traveling along the arcuate locus.

  A plurality of imaging means such as a CCD-line camera constituting the inspection apparatus and a plurality of light sources such as an LED illuminator provided in a pair with the CCD-line camera have an arcuate locus. It is arranged radially around the part.

JP 2010-22214 A

  By the way, in printed matter such as banknotes and securities, in order to prevent counterfeiting, a part of the pattern is printed using ink containing an infrared component. When inspecting a pattern portion printed with normal ink, conventionally, a plurality of inspection devices (imaging means, light sources, etc.) that detect and inspect each pattern portion are formed in a sheet form as in Patent Document 1. It has been necessary to form an arcuate trajectory part in a part of the movement trajectory of the object holding device and arrange it radially around the arcuate trajectory part or newly arrange an inspection cylinder.

  For this reason, a special space for the inspection apparatus is required, and there is a problem that the size of the printing press increases and the equipment for that purpose increases.

  Therefore, the present invention provides a sheet-like object inspection apparatus that can perform inspection of a pattern portion printed with normal ink and a pattern portion printed with ink containing an infrared component in a space-saving and cost-saving manner. The purpose is to provide.

  In order to solve the above-described problems, an inspection apparatus for a sheet-like material according to the present invention is a sheet-like material comprising a pattern portion printed with normal ink and a pattern portion printed with ink containing an infrared component. In this inspection apparatus, a white light source that irradiates a sheet-like object with light containing visible light, an infrared light source that irradiates the sheet-like object with light containing infrared light, and two visible lights that image the sheet-like object Imaging means, one infrared light imaging means for imaging a sheet-like object, and two visible light imaging means provided at a position that does not enter the field of view of the two visible light imaging means And the white light source and the infrared light so as to irradiate the light from the white light source and the light from the infrared light source onto the imaging surface of the sheet-like object by the one infrared light imaging means. Support both the light source and the support surface that supports the white light source. A light source support member having an inclined support surface for supporting the infrared light source, and the visible light reflected by the sheet-like material from the white light source and the infrared light source to cut only the infrared light. An infrared filter provided to be incident on the infrared light imaging means, and a visible light reflected by the sheet-like material from the white light source and the infrared light source and incident on the two visible light imaging means. It is judged whether or not the pattern portion printed on the sheet-like material with normal ink by light is appropriate, and is reflected by the sheet-like material from the white light source and the infrared light source to the one infrared light imaging means. And a control means for determining the suitability of the pattern portion printed on the sheet-like material with the ink containing the infrared component by the incident infrared light.

  Also, the sheet-like inspection apparatus according to the present invention is the above-described sheet-like inspection apparatus, wherein one of the infrared light imaging means is provided apart from each other in the width direction of the sheet-like object. It is provided between the imaging means for visible light of a stand.

  The sheet inspection apparatus according to the present invention supports both the two visible light imaging means and the one infrared light imaging means in the above-described sheet inspection apparatus. An imaging means supporting member is provided.

  Further, the sheet-like object inspection apparatus according to the present invention is the sheet-like object inspection apparatus described above, wherein two of the visible light imaging means and one of the infrared light imaging means are sheet-like objects. It is characterized in that the distances from the imaging surface are the same.

  According to the sheet inspection apparatus of the present invention, the visible light imaging means and the infrared light imaging means are arranged in a compact manner using an existing cylinder arrangement and the like, and printed with normal ink. Since the pattern portion printed with the ink containing the infrared component can be inspected simultaneously and on the same imaging surface, the space and cost of the inspection apparatus can be reduced.

It is a schematic block diagram of main embodiment of the inspection apparatus of the sheet-like object which concerns on this invention. It is the figure seen from the arrow line II direction of FIG. It is a control block diagram of the inspection apparatus of FIG. It is explanatory drawing of the pattern printed on paper. It is a whole schematic block diagram of the intaglio printing machine with which the inspection apparatus of FIG. 1 is applied. FIG. 6 is an enlarged enlarged view of the main part of FIG.

  Embodiments of a sheet-like object inspection apparatus according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments described with reference to the drawings.

<Main embodiment>
A main embodiment of a sheet-like inspection apparatus according to the present invention will be described with reference to FIGS.

  As shown in FIG. 5, an intaglio printing press as a final printing machine of a plurality of printing processes for printing numbers and seals as well as normal patterns includes a paper feeding device 10, a printing device 20, and a paper discharge device 30. I have.

  The sheet feeding device 10 on which the sheet-like paper W is stacked is connected to the difference plate 11 that receives the paper W sent from the upper layer one by one by the sucker mechanism of the sheet feeding device 10 and aligns the printing register. ing. A transfer drum 22 of a printing apparatus 20 having a gripping claw device is disposed on the front end side of the difference plate 11. Between the difference plate 11 and the transfer drum 22, a swing device 12 is provided that transfers the paper W on the difference plate 11 to the gripper device of the transfer drum 22.

  The transfer cylinder 22 is in contact with a so-called triple cylinder impression cylinder 21 in which three gripper claws are arranged at equal intervals along the circumferential direction and three rubber blankets are attached. . The impression cylinder 21 is in contact with a so-called triple cylinder cylinder 23 to which three intaglio plates are attached along the circumferential direction. The intaglio of the plate cylinder 23 is in contact with a so-called quadruple cylinder ink collecting cylinder 24 to which four rubber blankets can be attached along the circumferential direction.

  The ink collecting cylinder 24 has five so-called single cylinder chablon cylinders 25 in contact with each other in the circumferential direction, each having a circumferential surface length corresponding to the length of the blanket of the impression cylinder 21 and the intaglio of the plate cylinder 23. Yes. Each of these chablon cylinders 25 is in contact with an inking device 26 for supplying ink. The ink devices 26 are filled with inks of different colors.

  A wiping roller 27 is in contact with the intaglio plate of the plate cylinder 23. The wiping roller 27 is immersed in a wiping tank 28 that stores a cleaning liquid.

  The pressure drum 21 is in contact with a paper discharge drum 31 of a paper discharge device 30. An endless paper discharge chain 33 is wound between a pair of sprockets (not shown) provided coaxially with the paper discharge drum 31 and a pair of sprockets 32 arranged at the rearmost part of the paper discharge device 30. Has been. The paper discharge chain 33 is provided with a claw hook (not shown). A plurality of paper discharge trays 34 are provided on the downstream side in the traveling direction of the paper discharge chain 33.

  In such an intaglio printing press, when the paper W is sent out from the paper feeder 10 onto the differential plate 11 one by one, the paper W is delivered to the transfer cylinder 22 by the swing device 12, The holding claw device of the transfer cylinder 22 is replaced with the holding claw device of the impression cylinder 21 and delivered to the impression cylinder 21.

  On the other hand, after the ink of each inking device 26 is transferred to the ink collecting cylinder 24 via the chablon cylinder 25 and supplied onto the intaglio surface of the plate cylinder 23, the excess is removed by the wiping roller 27. , Transferred to the paper W held on the impression cylinder 21 and printed. The excess ink removed by the wiping roller 27 is washed away from the wiping roller 27 by the wiping liquid in the wiping tank 28.

  The paper W printed with the ink transferred from the plate cylinder 23 in this way travels along with the rotation of the impression cylinder 21, and the print quality will be described later on the peripheral surface of the impression cylinder 21. Inspected by the inspection device 40.

  Subsequently, the paper W is transferred from the pressure drum 21 to the paper discharge drum 31, and is then held and conveyed by a claw hook of the paper discharge chain 33 of the paper discharge device 30. Paper is discharged to the top.

  In the intaglio printing press according to the present embodiment, as shown in FIG. 6, the impression cylinder 21 is downstream in the rotational direction of the impression cylinder 21 with respect to the contact location with the plate cylinder 23 (see the printing location P1). In addition, printing is performed with normal ink (hereinafter referred to as “visible ink”) facing the peripheral surface on the upstream side in the rotation direction of the impression cylinder 21 with respect to the contact position with the paper discharge cylinder 31 (see the paper delivery position P2). The paper W inspection apparatus 40 includes the printed pattern portion and the pattern portion printed with ink containing infrared components (hereinafter referred to as “IR ink”).

  As shown in FIGS. 1 and 2, the inspection device 40 includes two pairs of white LED illuminators 41a1, 41a2, and a pair of white light sources that irradiate the paper W with light including visible light for inspection of visible ink. 41b1 and 41b2 and two visible color cameras 42A and 42B which are two visible light imaging means for imaging the paper W.

  Further, the inspection device 40 uses a pair of IR-LED illuminators 43a and 43b, which are infrared light sources that irradiate the paper W with light including infrared light, and the paper W for IR ink inspection. An IR monochrome camera 44, which is an imaging device for infrared light to be imaged, and the white LED illuminators 41a1, 41a2, 41b1, 41b2 and the IR-LED illuminators 43a, 43b reflected from the paper W An infrared light filter (IR filter) 45 that cuts off light having a wavelength shorter than visible light and causes only infrared light to enter the IR monochrome camera 44 is provided.

  One IR monochrome camera 44 is provided in the middle of the two visible color cameras 42A and 42B that are spaced apart in the width direction of the paper W, and the visual field of the two visible color cameras 42A and 42B. It is installed in a position that does not enter. In FIG. 2, L1 represents the inspection width of the visible color camera 42A, L2 represents the inspection width of the visible color camera 42B, and L3 represents the inspection width of the IR monochrome camera 44.

  The two visible color cameras 42A and 42B and the one IR monochrome camera 44 are arranged so that the optical axis is located on the normal line N with respect to the outer peripheral surface of the impression cylinder 21. The imaging surface is imaged from the vertical direction, and the distance from the imaging surface of the paper W is the same. That is, the three cameras 42A, 42B, and 44 are the same imaging means supporting members supported by the main frame 48 (see FIG. 6) with the longitudinal direction thereof along the axial direction of the impression cylinder 21. Both are supported by the frame 47.

  The white LED illuminators 41a1 and 41a2 and the IR-LED illuminator 43a are identically supported by the machine frame 48 (see FIG. 6) with the longitudinal direction facing the axial direction of the impression cylinder 21. Both are supported by the frame 49a. The white LED illuminators 41b1 and 41b2 and the IR-LED illuminator 43b are identically supported by the machine frame 48 (see FIG. 6) with the longitudinal direction facing the axial direction of the impression cylinder 21. Both are supported by the frame 49b.

  The support frames 49a and 49b are arranged on the white LED illuminators 41a1 and 41a1 with respect to the imaging surface of the paper W on the impression cylinder 21 by two visible color cameras 42A and 42B and one IR monochrome camera 44. The illumination is performed so that light including visible light from 41a2, 41b1, and 41b2 and light including infrared light from the IR-LED illuminators 43a and 43b are irradiated from a direction inclined with respect to the normal N. The angle θa2 formed between the perpendicular lines Na2 and Nb2 and the normal line N with respect to the support surfaces 49a2 and 49b2 for supporting the IR-LED illuminators 43a and 43b, while supporting the devices 41a1, 41a2, 41b1, 41b2, 43a and 43b. θb2 is perpendicular N to the support surfaces 49a1, 49b1 that support the white LED illuminators 41a1, 41a2, 41b1, 41b2. In other words, the angle θa4 formed between the irradiation direction of light by the IR-LED illuminators 43a and 43b and the imaging surface of the paper W so as to be smaller than the angles θa1 and θb1 formed by a1 and Nb1 and the normal line N. , Θb4 is smaller than the angles θa3, θb3 formed by the light irradiation direction of the white LED illuminators 41a1, 41a2, 41b1, 41b2 and the imaging surface of the paper W, and the support surfaces 49a2, 49b2 It inclines with respect to surface 49a1, 49a2. In this embodiment, such support frames 49a and 49b constitute a light source support member.

  The inspection device 40 is reflected by the paper W from the white LED illuminators 41a1, 41a2, 41b1, 41b2 and the IR-LED illuminators 43a, 43b, and enters the two visible color cameras 42A, 42B. The white LED illuminators 41a1, 41a2, 41b1, 41b2 and the IR-LED illumination are determined by determining whether the pattern portion printed with visible ink on the paper W and the pattern portion printed with IR ink are visible. Control that is a control means for judging the suitability of the shape of the pattern portion printed with the IR ink on the paper W by infrared light reflected from the paper 43a and 43b on the paper W and incident on one IR monochrome camera 44 A device 46 is provided.

  Here, the optical and electrical configuration of the inspection apparatus 40 will be described with reference to FIG. The inspection apparatus 40 has the above-described two visible color cameras 42A and 42B that capture the image portion printed on the paper W with visible ink, and the above-described one that captures the image portion printed on the paper W with IR ink. A single IR monochrome camera 44 and a control device 46 for inspecting the print quality of the pattern printed on the paper W based on the imaging output from the cameras 42A, 42B, 44. These cameras 42A, 42B, and 44 include an optical system including lenses 42Aa, 42Ba, and 44a, and CCDs (Charge Coupled Devices) 42Ab, 42Bb, and 44b that convert images formed through the optical system into electric signals. Respectively.

  The control device 46 includes reference memories 50A (for IR monochrome cameras) and 50B (for visible color cameras) that store reference image signals, and detection memories 51A (for IR monochrome cameras) and 51B that store detected image signals. (For a visible color camera), a memory controller 55 that controls writing to and reading from the reference memories 50A and 50B and the detection memories 51A and 51B, and each read from the reference memories 50A and 50B and the detection memories 51A and 51B The judgment level setting circuits 52A (for IR monochrome camera) and 52B (for visible color camera) and the judgment level setting circuits 52A and 52B set the tolerance level difference for which the tolerance level difference between the two signals is set. The comparison circuit 53 that compares each of the two signals in consideration, and the CCDs 42Ab, 42Bb, 44b An amplifier 56 that amplifies the power, an A / D converter 57 that converts the output of the amplifier 56 from analog to digital and outputs the converted signal to the memory controller 55, a correction circuit 58 that adjusts the gain of the amplifier 56, and CCDs 42Ab, 42Bb, and 44b. And a CCD controller 59 for controlling.

  The reference memories 50 </ b> A and 50 </ b> B store reference image data read from a pattern part normally printed with visible ink and a pattern part normally printed with IR ink on the paper W at the start of a print job. As the reference image data, different reference image data for each print job is stored in the reference memories 50A and 50B. The detection memories 51A and 51B store detected image data read from the paper W to be inspected.

  The memory controller 55 controls writing and reading of data to and from the reference memories 50A and 50B and the detection memories 51A and 51B. The judgment level setting circuits 52A (for IR monochrome cameras) and 52B (for visible color cameras) are the reference image data read from the reference memories 50A and 50B and the detected image data read from the detection memories 51A and 51B. The permissible level difference is set in advance.

  The comparison circuit 53 has poor quality when the level difference between the reference image data read by the memory controller 55 and the detected image data is equal to or larger than the allowable level difference set in the determination level setting circuits 52A and 52B. The signal which shows that is output. That is, by comparing the reference image data corresponding to each pixel of the CCDs 42Ab, 42Bb, and 44b with the detected image data one by one, the levels of both data corresponding to each pixel are compared, and even one of them exceeds the tolerance. In this case, a failure signal is output.

  Specifically, the comparison circuit 53 sequentially compares the reference image data read from the reference memories 50A and 50B and the detected image data read from the detection memories 51A and 51B for each pixel. Perform the action. Next, the comparison circuit 53 compares the level difference between the two signals obtained by the first comparison operation with the allowable level difference output from the determination level setting circuits 52A and 52B. I do. As a result of the second comparison operation, when the level difference between the two signals is larger than the allowable level difference, the comparison circuit 53 uses the pattern portion printed with the visible ink on the paper W to be inspected and the IR ink. A defect signal indicating that each printed pattern portion is defective is output.

  The correction circuit 58 adjusts the gain of the amplifier 56 in accordance with the rotation speed of the impression cylinder 21. That is, even when the same amount of light is incident on the cameras 42A, 42B, 44, the output level of the CCDs 42Ab, 42Bb, 44b decreases as the rotational speed of the impression cylinder 21 increases, so that the influence of the rotational speed is removed by the correction circuit 58. It is. A phase signal is supplied to the memory controller 55, the comparison circuit 53, the correction circuit 58, and the CCD controller 59. The memory controller 55 is supplied with a reference value memory signal. A determination start signal is supplied to the memory controller 55 and the comparison circuit 53.

  The phase signal is generated from the output signal of a rotary encoder (not shown) that detects the rotational phase of the impression cylinder 21. The phase signal includes a reference pulse that rises every rotation of the impression cylinder 21 and a clock pulse that rises every fixed rotation of the impression cylinder 21. The reference value memory signal is a signal for reading reference image data into the reference memories 50A and 50B via the memory controller 55, and is supplied by an operation of a reference value memory switch (not shown) by the operator. The determination start signal is a signal for instructing start of comparison operation between the reference image data and the detected image data, and is supplied by an operation of a determination start switch (not shown) by the operator.

  In the inspection apparatus 40 configured in this way, first, as a pre-process of the quality inspection process, a pattern part that is normally printed with visible ink on a paper W and a pattern part that is normally printed with IR ink, respectively. The reference image data to be captured is taken in. Specifically, the operator confirms the printing state of the paper W during the trial printing using the paper W. When it is confirmed that the printing state is good, supply of a reference value memory signal to the control device 46 is started by operating a reference value memory switch (not shown). When a reference signal representing the reference position of the impression cylinder 21 is output from the rotary encoder, the acquisition of the reference image data is started from the paper W held and conveyed by the impression cylinder 21 and stored in the reference memories 50A and 50B. .

  After the reference image data of the paper W held and conveyed by the impression cylinder 21 is stored in the reference memories 50A and 50B, the determination process is started by a determination start signal. In this determination process, first, similarly to the reading of the reference image data, the detected image data of the paper W held and conveyed by the pressure drum 21 corresponding to the detection memories 51A and 51B is read as the pressure drum 21 rotates. It is. Next, the detected image data read during the determination process is compared with the reference image data stored in advance, and printed with the visible ink on the paper W depending on whether the level values of both data are within the allowable level difference. The suitability of the pattern portion and the suitability of the pattern portion printed with the IR ink on the paper W are respectively determined.

  For example, according to the monochrome camera 44 for IR, as shown in FIG. 4, the pattern portion VE printed with visible ink on a large number of small pieces (banknotes, securities, etc.) Wa of the paper W to be inspected is The visible light irradiated and reflected from the white LED illuminators 41a1, 41a2, 41b1, 41b2 and the IR-LED illuminators 43a, 43b are all cut by the IR filter 45, irradiated to the imaging surface, and reflected as it is. Since external light is incident, all of it appears white.

  The pattern portions IEa and IEb printed on the both sides of the pattern portion VE printed with visible ink and printed with IR ink are white LED illuminators 41a1, 41a2, 41b1, 41b2, and IR-LED illuminators 43a, 43b. Infrared light that is irradiated onto the imaging surface and reflected while being absorbed by the IR ink enters the IR monochrome camera 44 through the IR filter 45, so that the image appears black and clear.

  As a result, detailed inspection of the shapes of the picture portions IEa and IEb printed with IR ink is possible. In the visible color cameras 42A and 42B, both the pattern portion VE printed with the visible ink and the pattern portions IEa and IEb printed with the IR ink are the same color as when each portion was viewed with the eyes. Since the image is picked up by the method, detailed inspection of both portions becomes possible.

  As described above, since visible light and infrared light have different wavelengths, the pattern portion VE printed with visible ink and the pattern portions IEa and IEb printed with IR ink can be simultaneously inspected on the same imaging surface. .

  Therefore, according to the present embodiment, inspection of the pattern portion VE printed with visible ink and the pattern portions IEa and IEb printed with IR ink is performed on the existing impression cylinder 21 without providing a dedicated inspection cylinder. Since the inspection can be performed simultaneously and on the same imaging surface, it is possible to save the space of the inspection apparatus 40, avoid the enlargement of the printing press, and reduce the number of parts, etc. Can be achieved.

  Furthermore, the support frames 49a and 49b are provided with the white LED illuminator for the imaging surface of the paper W on the impression cylinder 21 by the two visible color cameras 42A and 42B and the single IR monochrome camera 44. In order to irradiate light including visible light from 41a1, 41a2, 41b1, and 41b2 and light including infrared light from the IR-LED illuminators 43a and 43b from a direction inclined with respect to the normal N, The angle formed by the normal lines N2 and Nb2 with respect to the support surfaces 49a2 and 49b2 for supporting the IR-LED illuminators 43a and 43b and the normal line N while supporting the illuminators 41a1, 41a2, 41b1, 41b2, 43a, and 43b. θa2 and θb2 correspond to the support surfaces 49a1 and 49b1 that support the white LED illuminators 41a1, 41a2, 41b1, and 41b2. In other words, the direction of light irradiation by the IR-LED illuminators 43a and 43b and the imaging surface of the paper W are formed so as to be smaller than the angles θa1 and θb1 formed by the perpendicular lines Na1 and Nb1. The support surfaces 49a2 and 49b2 are set so that the angles θa4 and θb4 are smaller than the angles θa3 and θb3 formed by the light irradiation direction of the white LED illuminators 41a1, 41a2, 41b1, and 41b2 and the imaging surface of the paper W. Since it is inclined with respect to the support surfaces 49a1 and 49a2, the white LED illuminators 41a1, 41a2, 41b1, 41b2 and the IR-LED illuminators 43a, 43b, only by adjusting the direction of the support frames 49a, 49b. The illuminators 41a1, 41a2, 41b1, 41b2, 43a, 43 without causing a deviation in the irradiation direction with respect to 43b. It is possible to adjust the orientation collectively, it is possible to facilitate the adjustment work by the operator.

  Further, since the support frame 47 supports the two visible color cameras 42A and 42B and the single IR monochrome camera 44, it is necessary to adjust the orientation of the support frame 47 to adjust the two frames. The orientation of the cameras 42A, 42B, 44 can be adjusted in a lump without causing a shift in the imaging direction of the visible color cameras 42A, 42B and the single IR monochrome camera 44. Adjustment work can be facilitated.

  The present invention is not limited to the above-described embodiment, and various changes such as a cylinder arrangement and a change in ink color are possible without departing from the gist of the present invention.

  The sheet-like object inspection apparatus according to the present invention can perform inspection of a pattern portion printed with normal ink and a pattern portion printed with ink containing an infrared component at a reduced space and cost. It is extremely effective when used in the printing industry that performs printing such as banknotes and securities printing where quality control is important.

DESCRIPTION OF SYMBOLS 10 Paper feeder 11 Substrate 12 Swing device 20 Printing device 21 Impression cylinder 22 Transfer cylinder 23 Plate cylinder 24 Ink collecting cylinder 25 Chablon cylinder 26 Inking apparatus 27 Wiping roller 28 Wiping tank 30 Paper discharge apparatus 31 Paper discharge cylinder 32 Sprocket 33 Ejection Paper chain 34 Paper discharge table 40 Inspection device 41a1, 41a2, 41b1, 41b2 White LED illuminator 42A, 42B Visible color camera 42Aa, 42Ba Lens 42Ab, 42Bb CCD
43a, 43b IR-LED illuminator 44 IR monochrome camera 44a Lens 44b CCD
45 IR filter 46 Control device 47 Support frame 48 Machine frame 49a, 49b Support frame 50A Reference memory (for IR monochrome camera)
50B reference memory (for visible color camera)
51A detection memory (for IR monochrome camera)
51B Detection memory (for visible color camera)
52A judgment level setting circuit (for IR monochrome camera)
52B judgment level setting circuit (for visible color camera)
53 Comparison circuit 55 Memory controller 56 Amplifier 57 A / D converter 58 Correction circuit 59 CCD controller W Paper Wa Small piece (banknotes, securities, etc.)
P1 Print location P2 Paper delivery location VE Pattern portion printed with visible ink IEa, IEb Pattern portion printed with IR ink L1 Inspection width of visible color camera 42A L2 Inspection width of visible color camera 42B L3 IR monochrome camera 44 inspection width

Claims (4)

In an inspection apparatus for a sheet-like material including a pattern part printed with normal ink and a pattern part printed with ink containing an infrared component,
A white light source that irradiates the sheet-like material with light including visible light;
An infrared light source that irradiates the sheet-like material with light including infrared light;
Two imaging means for visible light for imaging a sheet-like object;
One infrared light imaging means that is provided at a position that does not enter the field of view of the two visible light imaging means, and that images a sheet-like object;
The imaging surface of the sheet-like object by the two imaging units for visible light and the one imaging unit for infrared light is irradiated with light from the white light source and light from the infrared light source. A support member for a light source that supports both the white light source and the infrared light source, and has a support surface that supports the infrared light source inclined with respect to a support surface that supports the white light source;
An infrared light filter provided so as to cut visible light reflected from the sheet-like material from the white light source and the infrared light source and to allow only infrared light to enter the infrared light imaging means;
Based on the visible light reflected from the white light source and the infrared light source and incident on the two visible light imaging means, the suitability of the pattern portion printed on the sheet material with normal ink is determined. At the same time, the infrared light reflected from the white light source and the infrared light source and incident on one infrared light imaging means is printed on the sheet material with ink containing an infrared component. And a control means for judging the suitability of the pattern portion. In the sheet-like object inspection apparatus according to claim 1,
One of the infrared light imaging means is provided between the two visible light imaging means spaced apart in the width direction of the sheet-like object. Inspection device. In the sheet-like object inspection apparatus according to claim 1 or 2,
An inspection apparatus for sheet-like objects, comprising: an imaging means support member that supports both the visible light imaging means and the one infrared light imaging means. In the sheet-like object inspection apparatus according to any one of claims 1 to 3,
The sheet-like object inspection apparatus, wherein the two image pickup means for visible light and the one image pickup means for infrared light are provided at the same distance from the imaging surface of the sheet-like object. .

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