WO2007077592A1 - Dispositif de controle de matiere imprimee - Google Patents

Dispositif de controle de matiere imprimee Download PDF

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Publication number
WO2007077592A1
WO2007077592A1 PCT/JP2005/024041 JP2005024041W WO2007077592A1 WO 2007077592 A1 WO2007077592 A1 WO 2007077592A1 JP 2005024041 W JP2005024041 W JP 2005024041W WO 2007077592 A1 WO2007077592 A1 WO 2007077592A1
Authority
WO
WIPO (PCT)
Prior art keywords
printed matter
air
sheet
inspection
inspection position
Prior art date
Application number
PCT/JP2005/024041
Other languages
English (en)
Japanese (ja)
Inventor
Takanori Aoki
Mahito Matsui
Yoshitaka Hikami
Original Assignee
Dac Engineering Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dac Engineering Co., Ltd. filed Critical Dac Engineering Co., Ltd.
Priority to PCT/JP2005/024041 priority Critical patent/WO2007077592A1/fr
Priority to CN2005800524237A priority patent/CN101346233B/zh
Publication of WO2007077592A1 publication Critical patent/WO2007077592A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors

Definitions

  • the present invention relates to a printed matter inspection apparatus that takes an image of a printed matter printed on a sheet by a photographing means and inspects the printed matter in-line.
  • an image of a printed matter that has been printed in the final unit of sheet-fed printing is taken, and it is determined whether or not the power is normally printed without smearing or chipping.
  • an image of the printed matter is taken when the printed matter is transported onto the impression cylinder of the final printing unit, or provided between the impression cylinder of the final printing unit and the paper discharge unit. Shooting when the printed material is transported on the chain transport path.
  • Patent Document 1 JP-A-10-166557
  • a space-saving illumination device that has a high illumination effect and can illuminate printed matter on a cylinder such as an impression cylinder has been required in order to surely capture an image to be captured.
  • the present invention has an object to provide a printed matter inspection apparatus that suppresses fluttering of a sheet when taking an image of the printed matter in order to inspect the printed matter. It is another object of the present invention to provide a printed matter inspection apparatus that suppresses sheet flutter and has a high lighting effect.
  • the printed matter inspection apparatus is provided with a photographing means for photographing an image of the surface to be inspected of the printed matter, in line with the printed matter inspection device that inspects the printed matter printed on the sheet.
  • a first spraying means that blows air from the upper front of the conveyance direction to the inspection position to be photographed, and a second blowing means that blows air from the upper rear of the conveyance direction.
  • the printed material can be pressed downward by the air blown from both the first spraying means and the second spraying means, and the blown air flows in the width direction and upward of the printed material, Fluttering can be suppressed.
  • an air intake unit may be provided that inhales air discharged from the first spray unit and the second spray unit from above the inspection position sandwiched between the both spray units. Therefore, since the air discharged from the force of the first spraying means and the second spraying means is sucked in by the suction means provided between the two spraying means, the flow of air is not limited to the inspection position. It is possible to further suppress the fluttering caused by the blown air that almost never generates turbulence.
  • first spraying means and the second spraying means may each include a plurality of nozzles in the width direction of the printed matter, and spray uniform air in the width direction of the printed matter.
  • first spraying means and the second spraying means may always blow air to the inspection position to suppress the fluttering of the printed matter.
  • control means for controlling the start and end of air blowing by the first blowing means and the start and end of air blowing by the second blowing means, The control means terminates the spraying when a predetermined portion before the end of the printed material is transported to the inspection position, and causes the terminal force of the printed material to prevent air from entering the lower surface of the printed material. You can suppress fluttering! /.
  • a camera constituting the photographing means is provided above the inspection position, an intake port constituting the intake means is provided at a position between the inspection position and the camera, and the inspection is performed.
  • a photographing slit for securing an optical path between the position and the camera may be provided in the intake port.
  • the photographing unit includes at least a reflecting mirror having a shape in which a cross-sectional shape viewed from the side surface in the conveyance direction of the printed material lacks a part of an ellipse, and a light source provided at one focal point of the ellipse.
  • An illumination unit that is configured and a camera that captures an image of the surface to be inspected, and the other focal point of the ellipse is spaced a predetermined distance above the surface to be inspected or above or below the surface to be inspected
  • the illumination unit may be arranged so as to be positioned.
  • a straight line connecting the two focal points of the elliptical shape is inclined forward or backward in the transport direction with respect to the normal line of the surface to be inspected at the inspection position, and is a straight line connecting the two focal points of the elliptical shape.
  • the normal angle of the surface to be inspected, and the angle of reflection between the inspection position and the optical path between the camera and the normal of the surface to be inspected are substantially equal to each other. Put it down.
  • the photographing unit may photograph a printed material that is conveyed on a cylinder for offset printing.
  • the printed matter inspection apparatus as described above, the printed matter can be pressed downward by the air blown by both the first spraying means and the second spraying means, and the printed matter flutters. This makes it possible to capture accurate images.
  • first spraying means and the second spraying means are provided with a plurality of nozzles in the width direction of the printed matter, air can be sprayed substantially uniformly in the width direction of the printed matter, The printed material can be brought into close contact with the cylinder more reliably.
  • the printed matter can be pressed downward to prevent fluttering and take an accurate image.
  • the control unit starts spraying when the printed material is conveyed, and when the predetermined portion before the rear end of the printed material is conveyed to the inspection position, the spraying is ended. Since the upper surface force can be pressed down on the part where the fluttering occurs, and the spraying ends at the predetermined part before the rear end part, air does not enter the lower surface from the rear end of the printed matter, and the fluttering is suppressed. This makes it possible to take an accurate image of the printed material.
  • the light output from the light source provided at one of the elliptical focal points is reflected by the elliptical reflecting mirror, and illuminates the inspection position (near the inspection position) serving as the other focal point of the elliptical shape. Therefore, the light reflected by the reflecting mirror that is only the direct light (regular reflected light) with the light source power illuminates the inspection position (near the inspection position), so that the inspection position (near the inspection position) is illuminated.
  • the effect can be enhanced.
  • the lighting effect can be enhanced, there are few light sources. (Small), and a space-saving printed matter inspection apparatus can be obtained.
  • the light reflected by the reflecting mirror illuminates the inspection position (near the inspection position) from various directions, it is possible to inspect glossy printed matter such as metal foil such as gold foil and aluminum foil.
  • FIG. 1 is a schematic view of a printing machine equipped with a printed matter inspection apparatus.
  • FIG. 2 is a schematic view of the printed matter inspection apparatus also viewed from the side force.
  • FIG. 3 is an explanatory view of the printed material inspection apparatus when the upward force is also viewed.
  • FIG. 4 (a) is a graph showing the relationship between the amount of air blown out by the first blowing nozzle and its time, and (b) is the amount of air blown out by the second blowing nozzle and its time. It is a graph showing the relationship.
  • FIG. 5 is a cross-sectional view of a printed matter inspection apparatus including a reflecting mirror having a shape lacking a part of an ellipse.
  • FIG. 6 is a cross-sectional view of a printed matter inspection apparatus provided with a reflecting mirror having a shape lacking a part of an ellipse.
  • FIG. 7 is a cross-sectional view of a printed matter inspection apparatus including a reflecting mirror having a shape lacking a part of an ellipse and a shape lacking a part of a rectangle.
  • FIG. 8 is a block diagram illustrating an outline of a printed matter inspection apparatus. Explanation of symbols
  • Air intake 6a Air intake 6b Air intake nozzle
  • Multi-gradation area image creation unit 24 Master image storage unit
  • the printed matter inspection apparatus is an apparatus that is provided in a printing machine 1 for sheet-fed printing and inspects a printed matter printed by the final printing unit 2 in the printing machine 1.
  • This printed matter inspection device The camera 3 constituting the photographing means, the first spraying means 4 for blowing air from the upper front in the conveying direction, and the air from the upper rear in the conveying direction opposite to the first blowing means 4.
  • the printing machine 1 is an offset printing machine for a sheet, and a printing unit 2 prints a sheet fed with a sheet feeding unit (not shown). While the chain transport unit 8 is transported, the ink transferred onto the sheet by the dryer 12 is dried and discharged from the paper discharge unit 9.
  • a printing unit 2 there is only one printing unit 2. When printing many times, such as multi-color printing or double-sided printing, multiple printing units 2 are provided for printing.
  • the printing unit 2 is a printing unit that is generally used in offset printing.
  • a rubber cylinder also referred to as an offset cylinder or a rubber blanket
  • a rubber cylinder that transfers ink to a sheet of paper 10
  • This rubber cylinder 10 It is equipped with an impression cylinder 11, a plate cylinder (not shown), etc. for conveying the sheet to the chain conveying section 8 and conveying the sheet to which the ink has been transferred.
  • the chain transport unit 8 is provided with a dryer 12 that dries the ink printed by the printing unit 2.
  • the dryer 12 irradiates the printing surface with ultraviolet rays to fix the ink on the sheet.
  • an image of a sheet (printed material) 13 (see FIG. 3) conveyed on the impression cylinder 11 of the final printing unit 2 is taken by the camera 3.
  • the position for photographing the sheet (printed material) 13 is not limited to the impression cylinder 11 of the final printing mute 2. It may be on the conveyance path from the impression cylinder 11 to the paper discharge unit 9.
  • an image of the sheet 13 conveyed through the chain conveyance unit 8 is shot and printing is abnormal. You may make it judge whether it is a mistake. Further, the inspection may be performed by a printing unit other than the final printing unit 2.
  • the unit 2 that prints one side (for example, the front side) and the unit 2 that prints the other side (for example, the back side) can be inspected by two units.
  • Each unit An inspection device is installed in the printer, and when it is transported to the paper output unit 9, both sides are inspected.
  • the position where the sheet (printed material) is photographed is not limited to the impression cylinder 11, but may be on a cylinder (cylinder) such as a blank cylinder, a private cylinder, or an inversion cylinder. Good. It is desirable that the image to be shot be taken after the printing on the printing surface has been completed. However, when the surface of the printed material is coated, the image before the coating is taken. Based on the image, you can inspect it.
  • paper is taken as an example of printed matter, but the present invention is not limited to this, and printing is performed by a sheet-fed printing machine such as a synthetic resin sheet or a metal plate. For everything you can.
  • the printed matter inspection apparatus illuminates the camera 3 constituting the photographing means above the inspection position A provided on the impression cylinder 11, and the inspection position A and its vicinity. It is equipped with a lighting unit 7 that lights up.
  • the upper side of the inspection position in the claims and the specification does not mean the upper side of the printing machine 1 based on the upper and lower direction.
  • Direction More specifically, as shown in FIG. 2, it is the direction from the surface 13a to be inspected of the sheet (printed material) 13 to the camera 3 side.
  • the inspection position A is on a cylinder such as the impression cylinder 11
  • the radially outward direction from the axial center of the cylinder is above the inspection position.
  • the chain conveyance unit 8 shown in FIG. 1 has an inspection position
  • the printed material is conveyed to the inspection position of the chain conveyance unit 8
  • the surface force at the inspection position of the chain conveyance unit 8 is the printed material.
  • the direction toward the camera 3 that captures the image is above the inspection position.
  • conveyance direction in the claims and the specification indicates the direction in which the printed material is conveyed as shown in FIGS.
  • the front in the transport direction indicates the direction (side) in the future
  • the rear in the transport direction indicates the direction (side) that has already been transported.
  • the width direction of the printed material indicates a direction perpendicular to both the transport direction and the thickness direction of the printed material.
  • the camera 3 may be configured to photograph the entire inspection position A with one camera according to the length of the printed material in the width direction. A predetermined interval is set in the width direction. Therefore, the plurality of cameras 3 may take images of a certain area, and the whole image in the width direction of the inspection position A may be taken.
  • the camera 3 captures an image and may be a line sensor used in a scanner or the like. In particular, as shown in Figs. 1 and 2, etc., it is preferable to use a line sensor when photographing printed matter conveyed on the same month.
  • the determination unit 22 determines whether there is an abnormality in printing.
  • the determination unit 22 includes a master image storage unit 24 that stores a master image, a multi-gradation area image creation unit 23 that creates an area image from a line image captured by the camera 3, and the multi-gradation area. Compare the density level of each part of the image with the density level of the area image of the master image corresponding to the area image, and the part where the density level difference between the corresponding parts of both images exceeds the preset allowable value If there is, there is a comparison judgment unit 25 for judging the part as a defective part.
  • the illumination unit 7 includes a light source such as a fluorescent lamp or a light emitting diode, and illuminates at least the inspection position A.
  • a light source such as a fluorescent lamp or a light emitting diode
  • the first spraying means 4 is arranged in front of the sheet 13 in the conveying direction.
  • Diagonal upper force A means for blowing air in the vicinity of the inspection position B.
  • a plurality of first blowing nozzles 4 a are provided in the width direction of the sheet 13 at substantially equal intervals. The compressed air is blown out from the first blowing nozzle 4a.
  • the air blowout nozzles 4a By controlling the flow rate of air blown from each of the first blowout nozzles 4a so that all the nozzles 4a, 4a have almost the same flow rate, the air is almost uniformly distributed in the width direction of the sheet 13.
  • the sheet 13 can be brought into close contact with the impression cylinder 11 by spraying.
  • the flow rate of air blown near the center in the width direction may be increased, or the flow rate of air blown near the width direction end of the sheet 13 may be increased.
  • the first blowing nozzles 4a, 4a may be provided so as to have substantially the same length as the width direction of the sheet 13, but the width direction of the sheet 13
  • the first blowout nozzle 4a may be provided longer than the length of.
  • the first blowing nozzle 4a may be shorter than the length of the sheet 13 in the width direction. Further, the air blown from the first spraying means 4 may be always blown regardless of the transport position of the sheet 13, or a control means 26 (see FIG. 8) is provided as will be described later. You can control the start and end.
  • the second spraying means 5 is provided at the rear of the sheet 13 in the conveying direction.
  • the second blowing nozzles 5a, 5a, 5a may be provided so as to be approximately the same length as the width direction of the sheet 13, but the width of the sheet 13 is not limited. You may provide many 2nd blowing nozzles 5a so that it may become longer than the length of a direction. Depending on the type of the sheet 13, the second blowing nozzle 5a may be shorter than the length of the sheet 13 in the width direction.
  • the air blown from the second blowing means 5 may be always blown regardless of the transport position of the sheet 13, or a control means 26 (see FIG. 8) is provided as will be described later. You can control the start and end.
  • the intake means 6 is means for sucking air blown from the first spray means 4 and the second spray means 5, and as shown in FIG. 2, the first spray means 4 And the second spraying means 5 is disposed.
  • the air sucked by the suction means 6 passes through an air filter (not shown) to remove dust and the like, and is sprayed from the first spraying means 4 and the second spraying means 5 to the vicinity of the inspection position B and C. May be.
  • an air filter not shown
  • an optical path between the inspection position A and the camera 3 is provided at the intake port 6 a constituting the intake means 6.
  • the camera 3 can take an image of the inspection position A through the photographing slit 15, and is located between the first spraying means 4 and the second spraying means 5. Since the air intake means 6 can be provided in the air-conditioner, the air blown by both the blowing means can be efficiently sucked. Further, the intake means 6 and the camera 3 can be provided above the inspection position A, and these devices (means) can be installed even in a small space.
  • the intake means 6 may not necessarily be provided in the printed matter inspection apparatus. That is, the air blown by the first spraying means 4 and the second spraying means 5 is directed in the width direction of the sheet 13 and above the inspection position (outward of the normal 4 of the inspection position A). You can exhaust naturally! By not providing the intake means 6 in the printed matter inspection apparatus, the printed matter inspection apparatus can be made smaller, and a low-cost inspection apparatus can be obtained.
  • the flow of air can be controlled by sucking the blown air upward through the sheet 13, so that it can be used for a wide variety of sheets. An accurate image can be taken by reliably pressing down the sheet.
  • the printing press 1 is provided with a control means 26 (see FIG. 8) for controlling the start and end of spraying from the first spraying means 4 and the second spraying means 5, Based on the control signal of the control means 26, both spraying means 4, 5 are controlled.
  • the control means 26 includes a rotation speed of the impression cylinder 11 serving as an inspection position, a position of a gripper (not shown!) That is provided on the impression cylinder 11 and sandwiches the sheet 13 between the front end (front end in the conveyance direction), Based on information such as the length of the sheet 13 in the conveying direction, a calculation process is performed to control the start and end of spraying. As shown in FIG.
  • the control means 26 is used when the front end force of the transported sheet 13 is moved to the inspection position A by a predetermined portion before the position where the spraying of the sheet 13 is finished. Spraying is started, and the spraying ends when the predetermined part before the rear end (the rear end in the transport direction) of the sheet 13 moves to the inspection position A from the predetermined part where the spraying starts. To do.
  • FIG. 4 (a) is a graph showing the relationship between the amount of air blown from the first blow nozzle 4a of the first blowing means 4 and the time, and point D represents the sheet 13 Indicates the time when the front end of is transported to the inspection position A.
  • Point E indicates the time when the substantially central portion of the sheet 13 in the conveying direction is conveyed to the inspection position A, and point G indicates that the rear end of the sheet 13 is conveyed to the inspection position A.
  • the point H indicates the time when the front end of the sheet 13 to be inspected next to the sheet 13 is conveyed to the inspection position A.
  • the first blowing nozzle 4a does not blow air between the front end of the sheet 13 and the central portion (does not blow), and blows air between the central partial force and the rear end. (Blowing) Blow air from the rear end to the front end of the next sheet 13 (Blow).
  • FIG. 4 (b) is a graph showing the relationship between the amount of air blown from the second blowing nozzle 5 a of the second blowing means 5 and the time, and point D represents the sheet 13.
  • point D represents the sheet 13.
  • point E indicates the time when the substantially central portion in the transport direction of the sheet 13 is transported to the inspection position A
  • point F indicates a predetermined portion before the rear end of the sheet 13 (for example, The position 40 mm before the rear edge) indicates the time when the sheet 13 is conveyed to the inspection position A
  • the point H indicates that the front edge of the sheet 13 to be inspected next to the sheet 13 is conveyed to the inspection position A.
  • the point G indicates the time when the trailing edge of the sheet 13 is conveyed to the inspection position A, and the point H indicates the leading edge of the sheet 13 to be inspected next to the sheet 13.
  • control is performed so that blowing (spraying) is started when a substantially central portion in the transport direction of the sheet 13 is transported to the inspection position A.
  • the force at the front end side (gripper side) of the sheet from the center part may be controlled to start blowing (spraying) when it is transported to inspection position A, or the sheet may be controlled from the center part.
  • the first spraying means 4 is controlled so as to end the blowing (spraying) when the rear end portion of the sheet 13 is transported to the inspection position A, but it is in front of the rear end portion. It may be controlled to end the blowing (blowing) at a predetermined position on the side (front end side).
  • the second spraying means 5 may be controlled so as to finish the blowing (blowing) earlier than the blowing (blowing) of the first spraying means 4 ends! /, .
  • the second blowing Set the flow rate of air blown out from means 5 and the angle (direction) of the blow to inspection position C as appropriate. Also, depending on the type of sheet 13 (printed material) (thickness, size, material, etc.), set the flow rate of blowing (spraying) air, the spray start position, the spray end position, etc. as appropriate. .
  • the air intake means 6 always inhales without controlling the start and end of the blowout (spraying) like the first spraying means 4 and the second spraying means 5, but the first spraying means 6
  • the control means 26 may control the start and end of intake air in response to the blowout of the means 4 and the second blowing means 5.
  • the air intake amount of the air intake means 6 may be almost the same as the total amount of air blown by the two spray means 4 and 5, or a printed matter (sheets) that can be less than that. Set as appropriate according to the type (thickness, size, material, etc.) of the leaf paper 13).
  • FIG. 2 As shown in Fig. 2, two blowing means 4, 5 and intake means 6 are arranged, and as shown in Figs. 4 (a) and 4 (b), the blowing of air is controlled. As a result, as shown in FIG. 3, the sheet 13 in the region shown from the inspection position B to the inspection position C is pressed against the upper force and is in close contact with the impression cylinder 11. Further, since the two blowing means 4 and 5 blow air from the front and the rear in the conveying direction, most of the air hitting the sheet 13 is above the inspection position (normal line 14 of the inspection position A). The air flowing in the width direction of the sheet 13 and flowing upward in the normal line 14 is sucked from the intake port 6a.
  • the air hitting the rubber cylinder 10 does not enter between the sheet 13 and the impression cylinder 11, and the back end of the sheet 13 can be suppressed from fluttering. Further, the timing at which the second spraying means 5 finishes the spraying ends earlier than the timing at which the first spraying means 4 finishes the spraying. Fluttering caused by blowing air between the rear end of 13 and the impression cylinder 11 can be suppressed. [0045] Next, the quality determination of the printed matter by the determination means 22 will be described.
  • the determination unit 22 includes a multi-tone area image creation unit 23, a master image storage unit 24, and a comparison determination unit 25.
  • the master image storage unit 24 stores data of a master image that serves as a reference for determining whether a printed material is acceptable.
  • the master image data is a multi-tone area image.
  • the multi-gradation area image creation unit 23 receives a line image signal of a printed matter photographed by a camera (line sensor), and sequentially stores the data of the line image. An area image (inspected image) is created.
  • the comparison / determination unit 25 compares the density level of each part of the multi-tone area image with the density level of the area image of the master image corresponding to the area image, and the difference in density level between the corresponding parts of both images is determined in advance.
  • the part is judged as a defective part.
  • the pass / fail judgment is performed with a certain allowable range, it is possible to allow a slight defect that does not substantially cause a problem.
  • the cross-sectional shape of the printed material (sheet) 13 conveyed on the impression cylinder 11 viewed from the side in the conveying direction is a shape lacking a part of an ellipse.
  • a description will be given of the photographing means provided with an illuminating section comprising at least a reflecting mirror 16 and an internal light source 17 provided at one of the elliptical focal points 16a.
  • the reflecting mirror 16 is a concave mirror having a shape in which a cross-sectional shape viewed from the side surface in the conveying direction lacks a part of an ellipse.
  • This concave mirror is made of glass and has an outer surface with silver plating.
  • the concave mirror is not limited to this, and may be a concave mirror made of synthetic resin or a metal whose reflecting surface is mirror-polished. There may be.
  • the reflecting mirror 16 has an open lower end surface (lower end side) facing the surface 13 a to be inspected of the sheet 13.
  • the force that has two focal points on the ellipse The first focal point 16b on the side closer to the impression cylinder 11 of the reflector 16 which is one of the focal points is a sheet 13 conveyed on the impression cylinder 11.
  • the reflecting mirror 16 is disposed so as to be substantially located on the surface 13a to be examined which is the upper surface of the surface.
  • An internal light source 17 is disposed at the second focal point 16a, which is the other focal point.
  • This internal light source 17 is linear or rod-shaped
  • the light source for example, white diodes arranged in a row, halogen bulbs, fluorescent lamps, etc. can be used.
  • White diodes arranged in a row are convenient as point light sources, and fluorescent lamps are low-cost and suitable for inspection of multicolored printed products with a wide spectral distribution of the light sources.
  • a fluorescent lamp is used as the internal light source 17.
  • the internal light source 17 extends in the width direction of the sheet 13 and is disposed so as to be parallel to the inspection surface 13 a of the sheet 13.
  • the reflecting mirror 16 having the above-described structure, as shown in FIGS. 5 and 6, the light emitted from the internal light source 17 and reflected by the reflecting mirror 16 is reflected on the surface 13a to be inspected of the sheet 13.
  • the first focus 16b can be focused and the inspection position can be efficiently illuminated.
  • the first focal point 16b is a force located on the inspected surface 13a of the sheet 13.
  • the first focal point 16b may be separated by a predetermined distance above or below the inspected position 13a. .
  • a second slit 18 for securing an optical path between the surface to be inspected 13a (inspection position A) and the camera 3 is provided in the reflecting mirror.
  • the second slit 18 is an opening provided in the reflector 16 so as to extend in the width direction of the sheet 13 like the internal light source 17 and to be parallel to the internal light source 17.
  • a transparent member (photographing slit) 21 for securing an optical path between the surface 13a to be inspected and the camera 3 is also provided in the intake portion 6c along the width direction of the sheet 13 like the second slit 18. are provided.
  • the second slit 18 is formed by opening the reflecting mirror 16, and as will be described later, the air blown to the sheet 13 by the first blowing means 4 and the second blowing means 5 is the first slit. 2
  • the air is sucked into the intake nozzle 6b through the slit 18.
  • the transparent member 21 is a transparent member having glass, synthetic resin and the like.
  • the partial force is provided in the partial force intake portion 6c below the second slit 18 to the top of the reflecting mirror 16 so that air can be sucked from the second slit 18.
  • the intake means 6 shown in FIG. 5 sucks air blown from both the first blowing means 4 and the second blowing means 5 inside the reflecting mirror 16, and the air is discharged into the second air.
  • the suction nozzle 6 b is passed from the suction portion 6 c, so that the sheet 13 is pressed onto the impression cylinder 11 by the air blown from both blowing means 4, 5.
  • Can be attached Further, the air that pressed the sheet 13 collides with the vicinity of the inspection position A, and this bumped air is sucked up almost above the vicinity of the inspection position A and passes through the second slit 18 from the inside of the reflecting mirror 16. Since it passes, it is possible to generate an air flow other than the part at the inspection position.
  • the inspection position efficiently illuminates the inspection position by collecting the light emitted from the internal light source 17.
  • the printed matter at the illuminated inspection position can be imaged through the second slit 18 and the transparent member 21.
  • the inspection apparatus can be made compact. Further, since the light reflected by the reflecting mirror 16 illuminates the inspection position A (near the inspection position) from various directions, it is possible to inspect glossy printed matter such as metal foil such as gold foil and aluminum foil.
  • the reflecting mirror 16 includes a flat transparent member 19 at the opening of the lower end surface (lower end side) facing the surface 13a to be inspected of the sheet 13,
  • the transparent member 19 prevents air from entering the reflecting mirror 16.
  • the reflecting mirror 16 positioned on the optical path is provided with an optical path securing part (second slit) 20 made of a transparent material.
  • the optical path securing unit 20 may be configured by integrating a transparent member with the reflecting mirror 16 lacking the optical path securing unit 20 by bonding or the like.
  • the optical path securing portion 20 is not provided with a reflective material such as silver plating. You may comprise so that 20 may become transparent.
  • the transparent member 19 and the optical path securing unit 20 are transparent members having glass, synthetic resin and the like, and are configured so that air does not enter the reflecting mirror 16.
  • an outside of the reflecting mirror 16 is provided with an intake portion 6c for sucking air blown from the first blowing means 4 and the second blowing means 5, and air is provided along the outside of the reflecting mirror 16. So that the entire reflecting mirror 16 can enter the inside of the air intake portion 6c.
  • a transparent member 21 is provided in the intake portion 6c located on the optical path. That is, when the camera 3 takes an image at the inspection position A, the light emitted from the inspection position A (near the inspection position A) passes through the transparent member 19, the optical path securing unit 20, and the transparent member 21 to the camera 3. And it is possible to take an image.
  • the reflecting mirror 16 shown in FIG. 6 includes the internal light source 17 at the second focal point 16a existing on the side far from the impression cylinder 11, and the internal light source 17 is located.
  • the straight line connecting the second focus 16a and the other first focus 16b is the inspection target at the first focus 16b (inspection position A).
  • the sheet 13 is inclined forward with respect to a normal line (hereinafter simply referred to as a normal line) 14 with respect to the surface 13a in the conveyance direction of the sheet 13. That is, the second focal point 16a of the reflecting mirror 16 where the internal light source 17 is located is located closer to the front in the transport direction than the normal line 14.
  • an optical path securing unit 20 extending in the width direction of the sheet 13 and parallel to the internal light source 17 is provided near the top of the reflecting mirror 16 and behind the normal line 14 in the transport direction.
  • a camera 3 is provided above the outside of the reflecting mirror 16 and on the rear side in the transport direction from the normal 14. Then, the sheet 13 is inspected through the transparent member 21 provided in the intake portion 6c, the optical path securing portion 20 provided in the reflecting mirror 16, and the transparent member 19 provided in the opening at the lower end of the reflecting mirror 16. The camera 3 is arranged so that the first focus 16b on the surface 13a can be seen.
  • an incident angle J formed by a normal line and a straight line connecting the second focus 16a and the inspection position A (first focus 16b) and the inspection position A (first focus 16b) and the camera 3 are connected.
  • the camera 3, the internal light source 17, and the like are arranged so that the reflection angle K formed by the optical path (straight line) and the normal line 14 is equal. Therefore, as shown in FIG. 6, the camera 3 outputs specularly reflected light that is output from the internal light source 17 and directly illuminates the surface to be inspected 13a, and irregular reflection that is reflected by the reflecting mirror 16 and illuminates the surface to be inspected 13a. Both light can be captured.
  • the second focal point 16a where the internal light source 17 is located is tilted backward in the transport direction of the sheet 13 with respect to the normal line 14, and the transport direction from the normal line 14 above the outside of the reflecting mirror 16.
  • Camera 3 is provided at the front, and further, an incident angle J formed by a straight line connecting the second focal point 16a and the inspection position A (first focal point 16b) and a normal line 14 and the inspection position A (first focal point). Even if the reflection angle K formed by the normal line 14 and the optical path (straight line) connecting 16b) and the camera 3 is equal, the above-described effect can be obtained.
  • the reflecting mirror 27 is composed of an elliptical reflecting portion 27a having a shape with a part of an elliptical surface and a rectangular reflecting part 27b having a shape with a sectional shape lacking a part of a rectangle as viewed from the side force in the conveying direction. May be.
  • the rectangular reflection part 27b is integrated with the elliptical reflection part 27a near the top of the elliptical reflection part 27a, and the width of the sheet 13 is between the elliptical reflection part 27a and the rectangular reflection part 27b.
  • the light emitting slit 29 extending in the direction is provided.
  • the light output from the second light source 28 extending in the width direction of the sheet 13 passes through the projection slit 29 provided at the boundary between the elliptical reflecting portion 27a and the rectangular reflecting portion 27b and passes through the surface 13a to be inspected. Illuminate.
  • the internal light source 17 located at the first focal point 16b is disposed on the normal line.
  • the camera 3 and the second light source 28 are arranged so that the reflection angle M formed by the (straight line) and the normal line 14 is equal.
  • the second light source 28 can be used exclusively for the generation of specularly reflected light captured by the camera 3 at the first focal point 16b of the surface 13a to be inspected. Therefore, by adjusting the outputs of the internal light source 17 and the second light source 28, it is possible to optimize the tolerance between the regular reflection light and the irregular reflection light captured by the camera 3.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

La présente invention concerne un dispositif de contrôle de matière imprimée qui permet d’empêcher le battement de feuilles lorsque l’on photographie une image de matière imprimée en vue de contrôler la matière imprimée. Le dispositif de contrôle de matière imprimée comprend : des moyens destinés à photographier une image de matière imprimée ; de premiers moyens de pulvérisation d’air (4) destinés à pulvériser de l’air à partir d’une partie oblique supérieure avant suivant une direction de transport par rapport à un emplacement de contrôle à photographier ; de seconds moyens de pulvérisation d’air (5) destinés à pulvériser de l’air à partir d’une partie oblique supérieure arrière suivant la direction du transport ; et des moyens d’aspiration d’air (6) destinés à aspirer l’air évacué provenant au moins des premiers et des seconds moyens de pulvérisation d’air (4) et (5) au-dessus de l’emplacement de contrôle défini entre les premiers et les seconds moyens de pulvérisation (4) et (5).
PCT/JP2005/024041 2005-12-28 2005-12-28 Dispositif de controle de matiere imprimee WO2007077592A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2005/024041 WO2007077592A1 (fr) 2005-12-28 2005-12-28 Dispositif de controle de matiere imprimee
CN2005800524237A CN101346233B (zh) 2005-12-28 2005-12-28 印刷品检查装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/024041 WO2007077592A1 (fr) 2005-12-28 2005-12-28 Dispositif de controle de matiere imprimee

Publications (1)

Publication Number Publication Date
WO2007077592A1 true WO2007077592A1 (fr) 2007-07-12

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Application Number Title Priority Date Filing Date
PCT/JP2005/024041 WO2007077592A1 (fr) 2005-12-28 2005-12-28 Dispositif de controle de matiere imprimee

Country Status (2)

Country Link
CN (1) CN101346233B (fr)
WO (1) WO2007077592A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549571B (zh) * 2008-04-02 2011-02-16 Dac工程株式会社 制盒装置
US9070204B2 (en) 2011-06-07 2015-06-30 Prosper Creative Co., Ltd. Measuring instrument, measurement system, measurement position positioning method and measurement position positioning program using the same
EP4043218A1 (fr) 2021-02-11 2022-08-17 Heidelberger Druckmaschinen AG Machine à imprimer dotée d'un dispositif de transport de support à imprimer et d'une caméra

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
JP6842615B2 (ja) * 2016-07-13 2021-03-17 株式会社小森コーポレーション 印刷品質検査装置
CN106364156A (zh) * 2016-11-08 2017-02-01 北京华夏视科图像技术有限公司 印刷机
CN112248616A (zh) * 2020-11-12 2021-01-22 朗宇机电(深圳)有限公司 一种印刷机的印刷材料稳固系统及方法
CN112721441B (zh) * 2020-12-23 2022-05-06 江苏省高淳印刷股份有限公司 一种印刷机印刷质量检测装置

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JPH04358835A (ja) * 1991-06-05 1992-12-11 Kita Denshi:Kk 印刷物押え装置
JPH08142313A (ja) * 1994-11-18 1996-06-04 Mitsubishi Heavy Ind Ltd 印刷品質検査装置の照明装置
JP2000296602A (ja) * 1999-04-15 2000-10-24 Kita Denshi Corp 印刷エラー検出装置
JP2005188929A (ja) * 2003-12-24 2005-07-14 Dac Engineering Co Ltd ワーク検査装置
JP2006001079A (ja) * 2004-06-16 2006-01-05 Dac Engineering Co Ltd 印刷物検査装置

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CA2709370C (fr) * 2001-10-15 2012-11-27 Toppan Printing Co., Ltd. Procede d'impression, matiere imprimee et controleur d'impression
US20060005722A1 (en) * 2002-03-25 2006-01-12 Satoshi Nobukawa Misregistration when printing speed is changed, cutting misregistration, or pinter in which variation of printing density can be controlled
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JPH04358835A (ja) * 1991-06-05 1992-12-11 Kita Denshi:Kk 印刷物押え装置
JPH08142313A (ja) * 1994-11-18 1996-06-04 Mitsubishi Heavy Ind Ltd 印刷品質検査装置の照明装置
JP2000296602A (ja) * 1999-04-15 2000-10-24 Kita Denshi Corp 印刷エラー検出装置
JP2005188929A (ja) * 2003-12-24 2005-07-14 Dac Engineering Co Ltd ワーク検査装置
JP2006001079A (ja) * 2004-06-16 2006-01-05 Dac Engineering Co Ltd 印刷物検査装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549571B (zh) * 2008-04-02 2011-02-16 Dac工程株式会社 制盒装置
US9070204B2 (en) 2011-06-07 2015-06-30 Prosper Creative Co., Ltd. Measuring instrument, measurement system, measurement position positioning method and measurement position positioning program using the same
EP4043218A1 (fr) 2021-02-11 2022-08-17 Heidelberger Druckmaschinen AG Machine à imprimer dotée d'un dispositif de transport de support à imprimer et d'une caméra
EP4043217A1 (fr) 2021-02-11 2022-08-17 Heidelberger Druckmaschinen AG Machine d'impression doté d'un dispositif de transport de matière à imprimer et d'une caméra

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CN101346233B (zh) 2010-05-12
CN101346233A (zh) 2009-01-14

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