JP4984540B2 - Print mark inspection device - Google Patents

Description

  The present invention relates to a print mark inspection apparatus for inspecting whether a shelf life, date of manufacture, and other information printed on a food or pharmaceutical packaging sheet are correctly printed.

  Packaging sheets for food and pharmaceuticals become hot when absorbing infrared light, that is, heat rays, and the contents are easily damaged, so prints and paints using pigments with high infrared light transmittance design, patterns, designs, Colors are printed. For example, azo pigments, rutile titanium dioxide, perylene black, and the like are high in infrared light transmittance as printing paint pigments, and printing paints using such pigments are widely used. As pigments that absorb infrared light, carbon black, aniline black, iron oxide black, and the like are known (see, for example, Patent Documents 1 to 4). In addition, characters and designs are printed with a printing paint containing a pigment with high infrared light transmittance, irradiated with light containing infrared light, and the irradiated surface is imaged with an imaging device having infrared light sensitivity. There is an appearance inspection of an aluminum foil obtained by image processing of a video signal from an imaging device (see, for example, Patent Document 5). There is an appearance inspection machine for ignoring only ink printed on a PTP cover film by transmitting infrared light and determining foreign matter on the cover film (see, for example, Patent Document 6). Also, an adder that captures a character with a color imaging device that outputs R, G, and B signals and obtains an image signal in which luminance is emphasized with respect to the background, and a print inspection device that inspects the character from the image signal of the adder (See, for example, Patent Document 7).

  FIG. 12 shows an image obtained by actually capturing an image of a packaging sheet on which a print mark according to a conventional example is printed with an imaging device. An image 10a shown in FIG. 12 is obtained by irradiating a white fluorescent lamp light (visible light) onto the packaging sheet 4 on which the print mark 5 is printed, and taking an image with a monochrome CCD camera. In addition, the design, pattern, design, color, and the like 22 in the figure can be distinguished by a naked eye into a white portion 22w, a red portion 22r, a green portion 22g, and a blue portion 22b.

Japanese Patent No. 3406505 JP 2002-348491 A JP 2005-132460 A JP 2005-132461 A JP 2005-132462 A JP-A-2005-227302 Japanese Patent No. 3097067

In the appearance inspection of the conventional aluminum foil, because the printed mark is printed with a paint using a pigment having a high infrared light transmittance, if a design, pattern, design, color, etc. are printed under the mark, There has been a problem that the printed mark and the design, pattern, design, color, etc. printed under the printed mark cannot be separated, and the printed mark cannot be inspected.
In addition, the conventional print inspection apparatus requires a color imaging device and R, G, B for each addition processing means, and because it inspects characters with the image from the addition processing means, it takes time and is expensive. There was a problem of becoming a device.

  In addition, the packaging sheet 4 shown in FIG. 12 of the conventional example and the printed mark 5 are printed on the red portion 22r, the green portion 22g, and the blue portion 22b in dark colors except for the white portion 22w. Since the print mark 5 is also picked up in a dark color, it is difficult to distinguish between the design mark, pattern, design, color, etc. 22 and the print mark 5, so that the print mark 5 cannot be inspected.

  The present invention has been made to solve the above-described problems. Designs, patterns, designs, and the like are printed on a packaging sheet, and printed marks printed on the designs, patterns, designs, colors, etc. An object of the present invention is to obtain a printed mark inspection apparatus that can be inspected at low cost. It is another object of the present invention to obtain highly safe foods and medicines packaged with a packaging sheet inspected by this print mark inspection apparatus.

Printing mark inspection apparatus according to the present invention, design the packaging sheet such as foods and medicines rolled there is a high printing area transmittance of infrared light, pattern, design, color has been printed, the roll feeding said wrapping sheet wound in a Jo, a print mark inspection apparatus infrared light transmittance high printed on the printing area the infrared light absorption rate to inspect high print mark of the package sheet, Design, pattern, design, color, etc. are printed, printing means for printing a print mark with a high absorption rate of infrared light on the package sheet to be fed out, and infrared light in an area including the print mark printed on the package sheet An infrared light illuminating means for irradiating an image, an imaging means for imaging at least an area including a printed mark having infrared light sensitivity and irradiated with infrared light, and a printed mark obtained from the imaging means. Including image Is obtained by a checking means for checking the print mark.

  According to the present invention, since the design mark, pattern, design, color, etc. printed on the packaging sheet are separated from the printed print mark by using infrared light, a stable print mark can be inspected. At the same time, the apparatus is simplified, and a high-speed and inexpensive apparatus can be obtained.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram showing a print mark inspection apparatus according to Embodiment 1 of the present invention, and FIG. 2 shows a part of a packaging sheet before printing a print mark of the print mark inspection apparatus according to Embodiment 1 of the present invention. FIG. 3 is an enlarged view showing, FIG. 3 is an enlarged view showing a part of the packaging sheet after printing the print mark of the print mark inspection apparatus according to Embodiment 1 of the present invention, and FIG. 4 is a print mark according to Embodiment 1 of the present invention. FIG. 5 is a partial configuration diagram showing an arrangement example of the optical system of the print mark inspection apparatus according to Embodiment 1 of the present invention.

  A first embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 1 is a pillow packaging device, 2 is a control unit for controlling the pillow packaging device 1, 3 is a packaging sheet roll set in the pillow packaging device 1, 4 is a packaging sheet fed from the packaging sheet roll 3, and 5 is A print mark having a high absorption rate of infrared light printed on the packaging sheet 4, a printing portion 6 for printing the print mark 5 on the packaging sheet 4, and 7, infrared light on the print mark 5 printed on the packaging sheet 4. Infrared light illuminating device to be irradiated, 8 is infrared light irradiated from the infrared light illuminating device 7, 9 is an image capturing device for capturing the print mark 5 printed on the packaging sheet 4, and 10 is output from the image capturing device 9. 11 is an inspection device to which the image 10 is input, and 12 is an inspection result output by the inspection device 11. The inspection result 12 is input to the control unit 2. 13 is a classification control signal output from the control unit 2, 14 is a classification unit to which the classification control signal 13 is input, 15 is a content such as food or medicine before packaging, and 16 is a packaging sheet containing the content 15 before packaging. 4 is an automatic packaging unit that is hermetically sealed and packaged, 17 is a product after packaging that is packaged on the packaging sheet 4 by the automatic packaging unit 16, 18 is a conveyance unit that conveys the content 15 before packaging and the product 17 after packaging, 19 Is a printed mark good product in which the packaged product 17 is classified as a non-defective product by the classification unit 14, 20 is a printed mark defective product in which the packaged product 17 is classified as a defective product in the classification unit 14, and 21 is a printed mark good product. 19 is a non-defective storage unit for storing 19.

Next, the operation will be described. FIG. 2 shows a part of the packaging sheet 4 before the printing mark is printed. As shown in the figure, the wrapping sheet 4 is a continuous paint ribbon-like design paint, pattern, design, color, etc. 22 (not particularly distinguished) is a printing paint using a pigment having a high infrared light transmittance. It is printed and is wound in a roll shape to form a packaging sheet roll 3.
The pillow packaging apparatus 1 feeds the packaging sheet 4 from the packaging sheet roll 3 to the printing unit 6, and the printing unit 6 prints the printing mark 5 having a high infrared light absorption rate on the packaging sheet 4. FIG. 3 shows a part of the packaging sheet 4 after the printing mark 5 is printed. Designs, patterns, designs, colors, and the like 22 are printed on the portion of the packaging sheet 4 to be printed.
The pillow packaging device 1 feeds the packaging sheet 4 on which the print mark 5 is printed to a position where the infrared light 8 is irradiated, and the infrared light illumination device 7 irradiates the area including the print mark 5 with the infrared light 8. To do. The imaging device 9 images a region including the print mark 5 irradiated with the infrared light 8 and outputs an image 10. The inspection device 11 inspects the print mark 5 from the image 10 including the print mark 5 and outputs the inspection result 12 to the control unit 2.
The pillow packaging device 1 feeds the packaging sheet 4 on which the inspected print mark 5 is printed to the automatic packaging unit 16, and the transport unit 18 transports the contents 15 before packaging to the automatic packaging unit 16. The contents 15 are sealed with the packaging sheet 4 and packaged. The conveyance unit 18 conveys the packaged product 17 packaged by the packaging sheet 4 on which the inspected print mark 5 is printed, to the classification unit 14.
Next, the control unit 2 stores and holds the inspection result 12 of the print mark 5, and when the transported product 17 reaches the classification unit 14, the control unit 2 classifies the inspection result 12 based on the stored and stored inspection result 12. A control signal 13 is output. The classification control signal 13 is divided into a non-defective product classification and a defective product classification.
The classification unit 14 classifies the packaged product 17 packaged by the packaging sheet 4 on which the inspected print mark 5 is printed according to the classification control signal 13. If the classification control signal 13 is a non-defective product classification, the print mark is a good product 19, and if it is a defective product classification, the print mark is a defective product 20. Since the non-defective product 19 is stored in the non-defective product storage unit 21 after classification, the non-defective product and the defective product of the printed mark can be separated, and a highly safe packaged product can be obtained.

  FIG. 4 shows an image 10 obtained by actually capturing an image of the packaging sheet 4 on which the print mark 5, which is an example of the present invention, is printed by the imaging device 9. The image 10 shown in FIG. 4 is the same monochrome CCD as that obtained by irradiating the same packaging sheet 4 as the image 10a of the conventional example shown in FIG. 12 with the infrared light 8 and imaging the image 10a shown in FIG. The image is taken by the camera 9. In addition, the design, pattern, design, color, and the like 22 in the figure can be distinguished by a naked eye into a white portion 22w, a red portion 22r, a green portion 22g, and a blue portion 22b. However, the packaging sheet 4 irradiated with the infrared light 8 shown in FIG. 4 and the printed print mark 5 are printed using a pigment whose design, pattern, design, color, etc. 22 has a high transmittance of the infrared light 8. Since the monochrome CCD camera 9 is printed with paint and is also sensitive to the infrared light 8, the red portion 22r, the green portion 22g, and the blue portion 22b, including the white portion 22w, are imaged in a bright color. Since the print mark 22 printed on the image is picked up in dark color, the print mark 5 can be discriminated, the print mark 5 can be inspected, and an inspection apparatus can be constructed with a simple configuration, so that the print mark inspection is inexpensive. A device can be obtained.

  FIG. 5 shows an arrangement of an optical system which is an example of the present invention. In FIG. 5, the indoor lighting 23 irradiates the room with visible light 24. Further, infrared light 8 is applied to the packaging sheet 4 on which the print mark 5 is printed by the infrared light illumination device 7. In the imaging device 9, an infrared light transmission / visible light blocking filter 26 is attached to the front surface of the lens 25. Therefore, the visible light irradiated to the packaging sheet 4 from the room illumination 23 is blocked by the infrared light transmission / visible light blocking filter 26 and does not reach the imaging device 9. Since the infrared light 8 applied to the light passes through the infrared light transmission / visible light blocking filter 26 and reaches the imaging device 9, a good image 10 can be obtained.

Embodiment 2. FIG.
FIG. 6 is a structural diagram showing a packaging sheet on which a print mark of a print mark inspection apparatus according to Embodiment 2 of the present invention is printed, and FIG. 7 shows an arrangement example of an optical system of the print mark inspection apparatus according to Embodiment 2 of the present invention. It is a partial block diagram shown.
As shown in FIG. 6, the packaging sheet 4a in the second embodiment has a sandwich structure in which a metal made of metal such as aluminum foil is sandwiched between a transparent sheet 28 on the back surface and a transparent sheet 29 on the front surface as a barrier material 27. In addition, a design, a pattern, a design, a color 22 and the like are printed with a printing paint using a pigment having a high transmittance of infrared light 8. FIG. 7 is a configuration diagram showing an arrangement example of the optical system of the packaging sheet 4 a including the metal barrier material 27. As shown in FIG. 7, a print mark 5 having a high absorption rate of infrared light 8 is printed on the surface of the packaging sheet 4 a, and the infrared light illuminating device 7 displays red on the print mark 5 on the print mark 5 side. The imaging device 9 is installed so as to irradiate the external light 8, and the imaging device 9 is installed so as to image the printing mark 5 irradiated with the infrared light 8 by the infrared illumination device 7 on the side of the printing mark 5. The infrared light 8 applied to the print mark 5 from the infrared light illumination device 7 is absorbed by the print mark 5, and the infrared light 8 applied to the packaging sheet 4 a other than the print mark 5 passes through the transparent sheet 29 on the surface. Since it passes through, is reflected by the metal barrier material 27, passes through the transparent sheet 29 on the surface again, and reaches the image pickup device 9, the print mark 5 is picked up in dark color, and the packaging sheet 4a other than the print mark is picked up in light color. A good image 10 can be obtained.

Embodiment 3 FIG.
FIG. 8 is a partial configuration diagram showing a configuration example of a packaging sheet on which a print mark of a print mark inspection apparatus according to Embodiment 3 of the present invention is printed and an arrangement example of an optical system.
In the second embodiment, the packaging sheet 4a including the metal barrier material 27 is described. However, in the third embodiment, the packaging sheet 4b does not require the metal barrier material 27 as shown in FIG. The design, pattern, design, color, etc. 22 are printed on the transparent sheet 29 using a pigment having a high transmittance of infrared light 8 and the print mark 5 having a high infrared light absorption rate is printed on the surface. ing. In addition, the reflecting plate 30 on the back side of the packaging sheet 4a is installed at a position facing the infrared light illumination device 7 with the packaging sheet 4b interposed therebetween. The infrared light 8 applied to the print mark 5 from the infrared light illumination device 7 is absorbed by the print mark 5, and the infrared light 8 applied to the packaging sheet 4b other than the print mark 5 passes through the packaging sheet 4b. Since the light is reflected by the reflection plate 30 on the back surface, passes through the packaging sheet 4b again, and reaches the imaging device 9, the print mark 5 is imaged in a dark color, and the packaging sheet 4b other than the print mark 5 is imaged in a light color, which is good An image 10 can be obtained.

Embodiment 4 FIG.
FIG. 9 is a partial configuration diagram showing a configuration example of a packaging sheet on which a print mark of a print mark inspection apparatus according to Embodiment 4 of the present invention is printed and an arrangement example of an optical system.
In the third embodiment, the reflector 30 on the back side is installed at a position facing the infrared illumination device 7 and the packaging sheet 4b, but in this fourth embodiment, as shown in FIG. The infrared light illumination device 7 is installed at a position facing the imaging device 9 and the packaging sheet 4b. The infrared light 8 applied to the print mark 5 from the infrared light illumination device 7 is absorbed by the print mark 5, and the infrared light 8 applied to the packaging sheet 4b other than the print mark 5 passes through the packaging sheet 4b. Therefore, the print mark 5 is picked up in a dark color, and the packaging sheet 4b other than the print mark is picked up in a light color, and a good image 10 can be obtained.

Embodiment 5 FIG.
FIG. 10 is a partial configuration diagram showing an arrangement example of the optical system of the print mark inspection apparatus according to the fifth embodiment of the present invention.
Since the third embodiment has been described based on the second embodiment, the infrared illumination device 7 and the imaging device 9 are installed on the same side as the print mark 5 printed on the surface of the packaging sheet 4b. As shown, the infrared light illumination device 7 and the imaging device 9 are installed not on the front surface side of the packaging sheet 4b on which the print mark 5 is printed but on the back surface side of the packaging sheet 4b on the opposite side, and the reflection plate 30 is placed on the packaging sheet. Even if it is installed on the surface side of 4b, the same effect can be obtained.

Embodiment 6 FIG.
FIG. 11 is a partial configuration diagram showing an arrangement example of the optical system of the print mark inspection apparatus according to Embodiment 6 of the present invention.
In Embodiment 4, since it demonstrated based on Embodiment 2, although the imaging device 9 was installed in the same side as the printing mark 5 printed on the surface of the packaging sheet 4b, the printing mark 5 is printed as shown in FIG. The same effect can be obtained even when the imaging device 9 is installed on the back side of the opposite packaging sheet 4b and the infrared illumination device 7 is installed on the front side of the packaging sheet 4b, not on the front side of the packaging sheet 4b. can get.

1 is an overall configuration diagram illustrating a print mark inspection apparatus according to Embodiment 1 of the present invention. It is an enlarged view which shows a part of packaging sheet before printing the printing mark of the printing mark inspection apparatus in Embodiment 1 of this invention. It is an enlarged view which shows a part of packaging sheet after printing the printing mark of the printing mark inspection apparatus in Embodiment 1 of this invention. It is an enlarged view which shows the image in the infrared light of the packaging sheet of the printed mark inspection apparatus in Embodiment 1 of this invention. It is a partial block diagram which shows the example of arrangement | positioning of the optical system of the printed mark inspection apparatus in Embodiment 1 of this invention. It is a structural diagram which shows the packaging sheet which printed the printing mark of the printing mark inspection apparatus in Embodiment 2 of this invention. It is a partial block diagram which shows the example of arrangement | positioning of the optical system of the printed mark inspection apparatus in Embodiment 2 of this invention. It is a partial block diagram which shows the structural example of the packaging sheet which printed the printing mark of the printed mark inspection apparatus in Embodiment 3 of this invention, and the example of arrangement | positioning of an optical system. It is a partial block diagram which shows the structural example of the packaging sheet which printed the printing mark of the printed mark inspection apparatus in Embodiment 4 of this invention, and the example of arrangement | positioning of an optical system. It is a partial block diagram which shows the example of arrangement | positioning of the optical system of the printed mark inspection apparatus in Embodiment 5 of this invention. It is a partial block diagram which shows the example of arrangement | positioning of the optical system of the printed mark inspection apparatus in Embodiment 6 of this invention. It is an enlarged view which shows the image in the infrared light of the packaging sheet of the conventional printing mark test | inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pillow packaging apparatus 2 Control part 3 Packaging sheet roll 4, 4a, 4b Packaging sheet 5 Print mark 6 Printing part 7 Infrared light illuminating device 8 Infrared light 9 Imaging device 10 Image 11 Inspection apparatus 12 Inspection result 13 Classification control signal 14 Classification unit 15 Contents before packaging 16 Automatic packaging unit 17 Product 18 after packaging 18 Transport unit 19 Print mark good product 20 Print mark defective product 21 Good product storage unit 22 Design, pattern, design, color, etc. 23 Indoor lighting 24 Visible light 25 Lens 26 Infrared light transmission / visible light blocking filter 27 Metal barrier materials 28 and 29 Transparent sheet 30 Reflecting plate

Claims (4)

Design the packaging sheet such as foods and medicines rolled there is a high printing area transmittance of infrared light, pattern, design, color has been printed, feeding the packaging sheet wound into a roll , A print mark inspection device for inspecting a print mark having a high absorption rate of infrared light printed on a print region having a high infrared light transmittance of the packaging sheet,
A printing means for printing a design mark, a pattern, a pattern, a color, etc., and printing a print mark having a high absorption rate of infrared light on the package sheet to be fed out,
Infrared light illuminating means for irradiating infrared light to a region including a print mark printed on the packaging sheet;
An image pickup means for picking up an image of an area including the print mark irradiated with the infrared light having at least infrared light sensitivity, and outputting an image;
Inspection means for inspecting a print mark from an image including the print mark obtained from the imaging means;
A printed mark inspection apparatus characterized by comprising: Design the packaging sheet such as foods and medicines rolled there is a high printing area transmittance of infrared light, pattern, design, color has been printed, feeding the packaging sheet wound into a roll , A print mark inspection device for inspecting a print mark having a high absorption rate of infrared light printed on a print region having a high infrared light transmittance of the packaging sheet,
A printing means for printing a design mark, a pattern, a pattern, a color, etc., and printing a print mark having a high absorption rate of infrared light on the package sheet to be fed out,
Infrared light illuminating means for irradiating infrared light to a region including a print mark printed on the packaging sheet;
An image pickup means for picking up an image of an area including the print mark irradiated with the infrared light having at least infrared light sensitivity, and outputting an image;
Inspection means for inspecting a print mark from an image including the print mark obtained from the imaging means;
Control means for outputting a classification control signal based on the inspection result of the print mark;
Classification means for classifying the food or medicine after packaging, which is packaged by the packaging sheet printed with the inspected print mark by the classification control signal,
A printed mark inspection apparatus characterized by comprising:   The imaging device is an imaging device having sensitivity to visible light and infrared light, and an infrared light transmission / visible light blocking filter that transmits only infrared light is installed in the imaging device. Or the printed mark inspection apparatus of Claim 2.   3. The print mark inspection apparatus according to claim 2, wherein the classification means classifies the print mark good product and the print mark defective product according to a classification control signal.

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