JP2006130795A - Composite checkup system of printing paper surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite checkup system of a printing paper surface which enables reduction of cost and space and improvement of properties of maintenance and operability of printing equipment and which enables also prevention of malfunction by comprehensive discrimination of a defective factor and can perform proper processings. <P>SOLUTION: The composite checkup system 1 of the printing paper surface can perform a plurality of checks and regulations on the basis of an image picked up by one optical image sensor 2. Therefore the system enables comprehensive judgment as to the contents of the checks and regulations and, in addition, can be operated with ease. In this composite checkup system 1 of the printing paper surface, accordingly, information is readily given as to the item that causes a fault, while in some usual cases, the fault is detected by a plurality of checking/regulating systems when it occurs in printing paper in regard to a certain item. Therefore the regulation of the system can be completed in a short time. It suffices for a web offset printing press 101 that it is provided with one or two optical image sensor 2 and it does not need to be provided with additional paper calipers or guide rollers. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a combined printing paper surface inspection apparatus that performs two or more inspections in combination on a color printed matter printed by a printing apparatus using a plurality of printing plates of different colors.

  A large amount of color printed matter is generally manufactured by process color printing by various methods such as offset printing, gravure printing, flexographic printing, and the like. For example, in the case of offset printing, the process of transferring ink from a printing plate to a blanket cylinder (off) and transferring from the blanket cylinder to paper (set) is a process of cyan (magenta), magenta (red), yellow (yellow). ) · Performs with black (black or black) ink, and reproduces a color image by superimposing images printed with each ink.

Printing presses such as web offset presses used for process color printing usually have multiple inspection / adjustments such as printing paper surface defect inspection device, color tone monitoring device, register adjustment device, nonble check device, cut-off adjustment device, web guide device, etc. The device is installed. When printing is performed by a printing press, printing misalignment and printing failure are checked by each of these devices, and inspection and adjustment of the ink amount and paper feed amount of the printing press are performed. An apparatus that performs such inspection / adjustment includes, for example, a function that removes the influence of expansion / contraction of a sheet and a temperature change after starting printing and reads a reflected light amount for each pixel (for example, a patent) Reference 1)), inspection can be performed with high accuracy.
JP 07-323528 A (page 3-5, Fig. 1-4)

  Each conventional inspection / adjustment device attached to a printing machine for process color printing is individually operated and includes an optical image sensor (imaging device) for imaging a printing paper surface. Therefore, in order to attach each inspection / adjustment device to the printing press and perform a plurality of inspections / adjustments, it is necessary to attach the optical image sensors of the respective inspection / adjustment devices to the printing press.

  However, since a space for mounting a plurality of sensors is not usually provided in a printing press, a plurality of guide rollers are provided to mount each optical image sensor, and a paper path for observation / inspection (printing paper) Route) had to be made separately. For this reason, there is a problem in that remodeling of the printing machine is costly and maintenance is deteriorated. Further, since each inspection / adjustment device operates independently as described above, it has to be individually operated and controlled, and the operation is complicated. In addition, when a defect occurs on the printing paper for an item, multiple defects may occur at the same time. In this case, multiple inspection / adjustment devices detect the defect, which causes the defect. However, it could not be determined immediately, and it took time to adjust the device.

  Therefore, the present invention can reduce the cost and space, improve the maintainability and operability of the printing apparatus, prevent malfunction by comprehensive failure factor determination, and can perform appropriate measures. An object is to provide an inspection device.

  The present invention has the following configuration as means for solving the above problems.

(1) An ink amount adjusting device for adjusting the amount of ink used for printing, a register adjusting device for adjusting the positional deviation of the printing plate, a cut-off adjusting device for adjusting the cutting position of the printing paper by changing the position of the guide roller, And a printing paper surface combined inspection device that inspects printed matter printed by a color printing machine that performs color printing using a plurality of printing plates with different ink colors, and a paper position adjusting device that adjusts the deviation in the width direction of the printing paper surface. There,
Imaging means for capturing an image of a running printing paper surface continuously printed by the color printer at a predetermined timing;
Storage means for storing reference image data of the printing paper;
Notification means for notifying the occurrence of a problem;
And means described in at least any two of the means listed in items 1 to 9 below.

1. The defect on the printing paper surface is detected by comparing the image on the printing paper surface with the reference image, and if a defect has occurred, the notification means is informed to that effect, or the ink distribution of the pattern on the printing paper surface 1. Defect detection means for discriminating the amount and causing the ink amount adjusting device provided in the color printing machine to change the ink amount based on the discrimination result. A color mark or pattern printed at a predetermined position on the printing paper surface is extracted to detect a deviation in ink density or color with respect to the reference image. If a deviation in ink density or color occurs, the notification is made accordingly. 2. Color tone monitoring means that informs the means or causes the ink amount adjusting device provided in the color printing machine to change the ink amount. A register mark printed at a predetermined position on the printing paper surface is extracted, and a relative misalignment between the register marks is calculated. 3. Registration adjusting means for causing the registration adjusting device provided in the color printing machine to change the position of the printing plate based on the calculation result. If the identification information of the printing plate printed at a predetermined position on the printing paper surface is a noble mark, printing plate information, or printing information is extracted and compared with the regular information of the reference image, 4. Noble check means for informing the informing means that the printing plate has been mismounted. When a cut-off mark printed at a predetermined position on the printing paper surface is extracted and its position is calculated, and a deviation occurs between the position and the reference position of the cut-off mark, based on this calculation result 5. Cut-off adjusting means for changing the cut-off position by the cut-off adjusting device provided in the color printing machine. Extracting the edge of the pattern and the edge of the printing paper surface in the feeding direction of the printing paper surface, measuring the amount of deviation with respect to the reference value of the width of the margin part of the cut-off mark, if a positional deviation occurs, 6. Cut-off adjusting means for causing the guide roller adjusting device provided in the color printing machine to change the positional deviation of the adjusting guide roller based on the measurement result. An edge in the width direction of the printing paper surface is detected, and a deviation amount of the edge of the paper surface at the reference position is measured. When a positional deviation occurs, the paper position of the color printing machine is determined based on the measurement result. 7. Paper position correcting means for causing the adjusting device to correct the misalignment. The image position of the printing paper surface is measured, and a pattern shift detection unit that detects a shift of the printed pattern in the sheet width direction, and a sheet shift to the sheet position adjustment unit of the printing apparatus based on the detection result of the pattern shift detection unit. 8. Paper position correcting means for correcting Recognizing the barcode symbol or specific character printed on the printing paper and comparing it with the information of the regular barcode symbol or specific character in the reference image, if the barcode symbol or specific character is incorrect, In this configuration, at least two inspections and adjustments can be performed on the basis of the image on the print paper imaged by one imaging unit. In order to perform the inspection, it is not necessary to attach a plurality of image pickup means to the color printing machine, so that cost and space can be reduced and maintenance of the printing machine can be improved. Further, since a plurality of functions can be realized with one inspection apparatus, the inspection apparatus can be easily operated without complicating operability. Furthermore, since a plurality of inspections / adjustments can be performed based on an image captured by one imaging unit, it is possible to comprehensively determine inspections and adjustment contents and to easily operate. Therefore, conventionally, when a defect occurs in the printing paper for a certain item, a plurality of inspection / adjustment devices may detect the defect. However, in the printing paper surface combined inspection apparatus of the present invention, which item causes the defect. Therefore, the adjustment of the printing press can be completed in a short time.

(2) image data acquisition means for acquiring upper digital image data for making a printing plate;
Printing characteristic information holding means for holding color conversion characteristic information of the proof printing apparatus and printing characteristic information of the color printer;
The storage means converts the upper digital image based on both the characteristic information held by the print characteristic information holding means, and lowers the resolution of the upper digital image after the conversion almost equal to the image taken by the imaging means. The resolution adjustment means to be stored in
It is provided with.

  In this configuration, the resolution of the upper digital image for making the printing plate is reduced to a resolution almost equal to that of the image captured by the imaging unit. Therefore, it is easy to compare the image captured by the imaging unit with the upper digital image. It is possible to detect printing defects. In addition, as the upper digital image data, information such as the design, color tone, and printing position of the upper digital image, information on the contents and position of characters and barcode symbols in the image, color mark, register mark, non-bleb mark, and cutoff By acquiring information such as the shape and position of the mark, it is possible to easily and reliably inspect printing defects by detecting a positional deviation of the mark based on such information.

(3) image data acquisition means for acquiring upper digital image data for making a printing plate;
Printing characteristic information holding means for acquiring in advance color conversion characteristic information of the proof printing apparatus and printing characteristic information of the imaging means;
Based on the both characteristic information acquired by the print characteristic information holding unit, the resolution of the image on the printing paper image captured by the image capturing unit is converted to be substantially equal to the upper digital image and stored in the storage unit Adjusting means;
It is provided with.

  In this configuration, the image picked up by the image pickup means is converted (interpolated) into a resolution almost equal to that of the upper digital image, and therefore, the printing defect is easily detected by comparing the converted image with the upper digital image. be able to. In addition, as the upper digital image data, information such as the design, color tone, and printing position of the upper digital image, information on the contents and position of characters and barcode symbols in the image, color mark, register mark, non-bleb mark, and cutoff By acquiring information such as the shape and position of the mark, it is possible to easily and reliably inspect printing defects by detecting a positional deviation of the mark based on such information.

  (4) The registration adjusting unit outputs a correction signal for changing the imaging timing to the imaging unit based on the calculation result when a positional deviation occurs.

  In this configuration, when the registration adjustment unit detects a misregistration, not only the registration adjustment is performed, but also the imaging timing of the imaging unit is corrected. Therefore, even if an image misregistration occurs, an imaging error does not occur. The entire image can be taken, and it is possible to prevent other means from making a detection error or inspection error. That is, it is possible to prevent malfunctions by comprehensive failure factor determination, and appropriate measures can be taken.

  (5) The registration adjusting means is characterized in that, when a displacement occurs, the defect detecting means causes the notifying means to suspend notification that a defect has occurred.

  In this configuration, the register adjusting unit and the defect detecting unit operate in cooperation with each other, so that when a misalignment occurs, it is possible to prevent a defect caused by the misalignment from being detected.

  (6) The registration adjusting means may cause the color tone monitoring means to notify the informing means of occurrence of ink density or color misregistration, or cause the ink amount adjusting device to make an ink amount when a positional deviation occurs. It is characterized by deferring the change.

  In this configuration, the registration adjusting unit and the color tone monitoring unit operate in cooperation with each other. Therefore, when a misregistration occurs, the color tone monitoring unit detects the color misregistration caused by the misregistration and changes the ink amount. Can be prevented.

(7) When the defect detection means detects a defect generated on the printing paper surface,
In addition to the result of determining the ink distribution amount of the pattern on the printing paper surface, the color tone monitoring unit is provided in the color printer based on the result of detecting the ink density or color deviation by reading the pattern on the printing paper surface. The ink amount adjustment device is allowed to change the ink amount.

  In this configuration, since the defect detection unit and the color tone monitoring unit operate in cooperation, when a defect occurs on the printing paper surface, the ink amount of the ink amount adjustment device is more accurately determined based on the detection result of both units. Can be changed.

  (8) The defect detection unit recognizes the arrangement of the pattern on the entire printing paper, recognizes at least one of the color mark, the register mark, the noble mark, and the cut-off mark, and Of the monitoring means, the register adjustment means, the noble check means, or the cut-off adjustment means, the position is set to any one of the above-described means that operates by detecting the recognized mark.

  In this configuration, since at least one of the color tone monitoring means, the register adjustment means, the noble check means, or the cut-off adjustment means and the defect detection means operate in conjunction with each other, the position of the mark is automatically set. It can be set in the inspection device. Therefore, it is possible to omit the step of setting the mark position in the apparatus by the operator.

(9) When the color tone monitoring unit detects an ink density or a color shift, the color tone monitoring unit outputs a detection result to the defect detection unit,
The defect detection unit corrects the density of the image captured by the imaging unit based on the detection result, and compares the image with the reference image.

  In this configuration, since the color tone monitoring unit and the defect detection unit operate in cooperation, the density of the captured image can be corrected even when the defect is difficult to detect because the density of the image on the printing paper has changed. . Therefore, it is possible to reliably detect image defects.

  The combined printing paper surface inspection apparatus of the present invention captures an image of a printing paper surface with a single imaging unit, performs a plurality of inspections simultaneously based on the image, and comprehensively determines which inspection content has a problem. Since the determination can be made, it is possible to prevent a failure from being erroneously determined due to a cause other than the failure cause. Further, since the printing paper surface combined inspection apparatus of the present invention images one side of the printing paper surface with one imaging unit, an extra paper path or guide roller is not provided for attaching the imaging unit to the printing device. Even the imaging means can be attached.

[First Embodiment]
FIG. 1 is a block diagram showing a schematic configuration of a combined printing paper surface inspection apparatus according to an embodiment of the present invention, and an overview of an offset rotary press. FIG. 2 is a schematic view showing the main parts of the offset adjusting device and the web guide device of the offset rotary press. In the following description, the case where the printing paper surface combined inspection apparatus of the present invention is attached to an offset rotary press will be described as an example.

  As shown in FIG. 1A, the offset rotary press 101 supplies the continuous paper P from the roll paper R set in the paper feeding device 102, and the continuous paper P passed through the web guide device 103 before the printing cylinder. For example, black, cyan, magenta, and yellow are printed in this order on the both sides by the printing unit 104, and the continuous paper P is heated and dried by the dryer 105. Then, the continuous paper P is cooled by the cooling cylinder 106, cut-off adjustment (paper feed adjustment) is performed by the cut-off adjusting device 107, and the meandering correction of the continuous paper P is performed by the web guide device 108 after the printing cylinder. Then, the continuous paper P is bent into a predetermined size by the folding machine 109. The printing unit 104 of the offset rotary press 101 is provided with an ink key adjusting device 111 for adjusting the ink amount and a register adjusting device 112 for adjusting the misregistration of the printing plate, although the configuration is not shown. . Between the web guide device 108 and the folding machine 109 of the web offset press 101, there are provided optical image sensors 2a and 2b which are image pickup means for picking up images on both sides printed on the printing paper. The image data picked up by the optical image sensor 2 is sent to the printing paper surface combined inspection apparatus 1 for various inspections and detection processes. Based on these results, the web guide apparatus 103 and the ink key adjustment apparatus of the offset rotary press 101 are used. 111, the registration adjusting device 112, the cut-off adjusting device 107, the web guide device 108, and the like are adjusted.

  Here, as shown in FIG. 2A, the cut-off adjusting device 107 includes a guide roller 121 and a guide roller 122 which are arranged in parallel at a predetermined interval and are adjustable guide rollers capable of changing the interval. An adjustment roller 120 is provided. In the cut-off adjusting device 107, the continuous paper P is passed through the cut-off adjusting device 107 so that the continuous paper P is sent to the web guide device 108 via the guide roller 121 and the guide roller 122. Further, the cut-off adjusting device 107 includes a roller position changing mechanism 123 (not shown) that changes the distance d between the guide roller 121 and the guide roller 122. When the position of the offset mark is shifted in the paper feeding direction of the continuous paper P due to an extension of the continuous paper P during printing, the distance d between the guide roller 121 and the guide roller 122 is changed by the roller position changing mechanism 123. As a result, the distance from the printing unit 104 of the continuous paper P that is running to the folding machine 109 can be changed, so that the position of the cut-off mark can be adjusted.

  The web guide devices 103 and 108 are devices that adjust the position of the continuous paper P in the width direction so that the continuous paper P always passes the center of the folding machine 109 or a predetermined position. Here, since the web guide device 103 and the web guide device 108 have the same configuration, the description of the configuration of the web guide device 108 is omitted. As shown in FIG. 2B, the web guide device 103 includes an angle change mechanism 135 (not shown) that changes the angles of the fixed guide rollers 131 and 132, the movable guide rollers 133 and 134, and the movable guide rollers 133 and 134. I have. Further, in the web guide device 103, the continuous paper P is passed through the paper so that the continuous paper P is fed through the respective rollers in the order of the fixed guide roller 131, the movable guide roller 133, the movable guide roller 134, and the fixed guide roller 132. Yes. In the web guide device 103, when a deviation in the width direction of the continuous paper P occurs, the angle changing mechanism 135 (not shown) changes the angle of at least one of the movable guide rollers 133, 134, so The position of the paper P in the paper width direction can be adjusted.

  Next, as shown in FIG. 1B, the printing paper surface composite inspection apparatus 1 includes an optical image sensor 2 (hereinafter, the generic term of the optical image sensors 2a and 2b is referred to as the optical image sensor 2), and A / D conversion. Device 3, Print defect inspection circuit 4, Color tone monitoring circuit 5, Misregistration detection circuit 6, Noble check circuit 7, Character / symbol detection circuit 8, Cutoff detection circuit 9, Paper flow detection circuit 10, CPU 11, and display device 12 It has.

  The optical image sensor 2 is provided between the web guide device 108 and the folding machine 109 in the offset rotary press 101 as described above, and the entire surface of the paper such as characters, patterns and marks on the running paper printed by the offset rotary press 101 is provided. Take an image. As shown in FIG. 1A, the optical image sensor 2a images the front cylinder side of the continuous paper P printed by the offset rotary press 101. Further, the optical image sensor 2b images the paper surface on the back cylinder side of the continuous paper P printed by the offset rotary press 101. As the optical image sensor 2, an imaging device such as a line type or area type CCD is suitable. Also, industrial cameras using these image sensors or other image sensors can be applied.

  The A / D conversion device 3 converts analog image data captured by the optical image sensor 2 into digital image data.

  The print defect inspection circuit 4 compares the digital image data output from the A / D conversion device 3 with the reference image data of the print paper imaged in advance, and outputs the difference data to the CPU 11. Based on this data, the CPU 11 detects various printing defects such as stains due to ink, oil, dripping, etc. of the printed matter, density changes due to fluctuations in the ink amount, white spots due to ink fading or plate wear, and the like. Print fault information is displayed.

  The color tone monitoring circuit 5 detects a small color mark printed with each used ink on the margin of the printing paper, and outputs the color mark data to the CPU 11. The CPU 11 measures the ink density of each ink based on the data of the color mark and displays that the ink density is changing on the display device 12 or sends an ink key control signal to the ink key adjustment device 111 of the printing unit 104. Or output.

  The registration error detection circuit 6 detects a registration mark from the image captured by the optical image sensor 2 and outputs position information of the registration mark to the CPU 11. The CPU 11 measures the amount of misalignment of the register mark based on the position information of the register mark, and outputs an adjustment signal of the amount of misalignment to the register adjusting device 112 of the offset rotary press 101 to correct the misregistration. In the past, the registration mark was adjusted by the operator while confirming that the cross marks for each ink color were completely overlapped. However, since it takes time and effort, recently, a register mark such as a square of 1 mm or less has been used. The registration marks are arranged separately for each ink color used, and the position of each registration mark is detected by the optical image sensor as described above.

  When using a plurality of printing plates, the noble check circuit 7 detects an identification mark (noble mark) inserted in order to prevent an error in mounting the printing plate on the plate cylinder and outputs it to the CPU 11. . The CPU 11 determines whether or not it is a printing plate to be attached to the plate cylinder, and if there is a mistake in mounting the printing plate, displays that fact on the display device 12. The noble mark is not limited to characters, and may be, for example, a barcode symbol, or a character or symbol printed on the continuous paper P may be used as the noble mark.

  The character / symbol detection circuit 8 detects, for example, a specific character or barcode symbol printed on the continuous paper P from the image on the printing paper surface, and outputs it to the CPU 11. The CPU 11 recognizes a specific character, barcode symbol, or the like, and if the content of the character or barcode symbol is incorrect, displays that fact on the display device 12.

  The cut-off detection circuit 9 detects a cut-off mark inserted in order to adjust the cutting position on the printing paper surface from the image on the printing paper surface, and outputs it to the CPU 11. The CPU 11 measures the amount of deviation of the cut-off mark (the amount of deviation in the paper feed direction), and outputs a control signal for adjusting the adjustment roller 120 of the cut-off adjusting device 107 provided in the offset rotary press 101. Adjust the position of the cut-off mark.

  The paper flow detection circuit 10 detects the edge of the printing paper in order to adjust the position of the printing paper so that the printing paper is always located at the center of the folding machine 109 of the offset rotary press 101 or at a predetermined position. The position information is output to the CPU 11. The CPU 11 outputs a control signal for adjusting the positions of the web guide devices 103 and 108 to adjust the position of the printing paper when the position of the end portion of the printing paper is deviated from a predetermined position.

  As described above, the CPU 11 processes the signal output from each part of the printing paper combined inspection apparatus 1 to display a warning on the display device 12 or outputs a control signal to each adjustment device of the offset rotary press 101. Or

  The display device 12 displays the error content and alarm to be notified to the operator based on the determination result of the CPU 11.

  Next, a more detailed configuration of the printing paper surface combined inspection apparatus 1 will be described. FIG. 3 is a block diagram showing a detailed configuration of the combined printing paper surface inspection apparatus. As shown in the figure, the printing paper surface composite inspection apparatus 1 includes an optical image sensor 2a, an A / D conversion apparatus 3 comprising an A / D conversion circuit 3a and a correction circuit 3b, a print defect inspection circuit 4, a color tone monitoring circuit 5, a register. Misalignment detection circuit 6, noble check circuit 7, character / symbol detection circuit 8, cut-off detection circuit 9, paper flow detection circuit 10, CPU 11, display device 12 comprising display 12a and warning lamp 12b, rotary encoder 13, and scan A control circuit 14 is provided.

  Here, when the running speed of the continuous paper P is slow, for example, by shifting the attachment positions of the optical image sensor 2a and the optical image sensor 2b and taking images at different timings, one side of the continuous paper P is provided. Can be inspected and adjusted by the combined printing paper surface inspection apparatus 1. In addition, when the running speed of the continuous paper P is high, one side of the continuous paper P is inspected and adjusted by one printing paper surface combined inspection apparatus 1, and both sides of the continuous paper P are arranged on two sides. You may make it test | inspect and adjust with the printing paper surface composite inspection apparatus 1. FIG. In the following description, a case where inspection / adjustment is performed by connecting only the optical image sensor 2a to the print sheet composite inspection apparatus 1 will be described. Further, the printing paper surface combined inspection apparatus to which the optical image sensor 2b is connected has the same configuration as the printing paper surface combined inspection apparatus 1 to which the optical image sensor 2a is connected.

  In the following description, the printing paper surface composite inspection apparatus 1 includes a print defect inspection circuit 4, a color tone monitoring circuit 5, a misregistration detection circuit 6, a noble check circuit 7, a character / symbol detection circuit 8, a cut-off detection circuit 9, In addition, a configuration for performing various types of inspection / detection by the circuit (hardware) of the paper flow detection circuit 10 will be described. In the CPU 11 or the MPU provided in place of the circuits 4 to 10 or a dedicated custom IC, or the CPU 11, You may make it run the program (software) produced so that the process similar to the process performed by each circuit may be performed.

  Further, in the present embodiment, the combined printing paper surface inspection apparatus 1 includes a printing defect inspection circuit 4, a color tone monitoring circuit 5, a misregistration detection circuit 6, a noble check circuit 7, a character / symbol detection circuit 8, a cut-off detection circuit 9, and Although the paper flow detection circuit 10 is provided, the present invention is not limited to this. In other words, any configuration including at least any two of the circuits 4 to 10 may be used. Even in such a configuration, by configuring each circuit to operate in cooperation, cost and space can be reduced, maintenance and operability of the printing device can be improved, and comprehensive failure factors The malfunction can be prevented by the discrimination, and appropriate measures can be taken.

  The print defect inspection circuit 4 includes a density correction circuit 21, a reference image memory 22, a difference circuit 23, an edge image generation circuit 24, an edge mask circuit 25, a first comparison circuit 26, a second comparison circuit 27, a third comparison circuit 28, And a mark position detection circuit 29.

  The color tone monitoring circuit 5 includes a mark position cutout circuit 31. The registration error detection circuit 6 includes a mark position extraction circuit 41. The noble check circuit 7 includes a character position cutout circuit 51. The character / symbol detection circuit 8 includes a character / symbol extraction circuit 61. The cut-off detection circuit 9 includes a mark position cut-out circuit 71. The paper flow detection circuit 10 includes a paper edge position cutout circuit 81.

  The CPU 11 includes a defect determination logic unit 91, an ink density calculation unit 92, an ink key control logic unit 93, a misregistration calculation unit 94, a noble mark reading unit 95, a character / symbol reading unit 96, a cut-off mark reading unit 97, a paper flow amount. A calculation unit 98 and a cutout position designation logic unit 99 are provided.

  The rotary encoder 13 is attached to, for example, the paper feeder 102, detects the paper feed amount of the roll paper R, and outputs a timing signal to the scan control circuit 124 every time the roll paper R rotates a predetermined amount. The scan control circuit 14 scans the optical image sensor 2a with a scan control signal at a predetermined timing based on the timing signal output from the rotary encoder 13 and the positional shift correction signal output from the positional shift calculation unit 94 of the CPU 11. Is output.

  When the optical image sensor 2a detects the scan control signal output from the scan control circuit 14, the optical image sensor 2a scans the image of the running continuous paper P (printing paper surface) at a predetermined timing and outputs analog image data.

  The A / D conversion circuit 3a of the A / D conversion device 3 converts the analog image data output from the optical image sensor 2 into digital image data. The correction circuit 3b corrects the sensitivity and dark level of the sensor for the digital image data output from the A / D conversion circuit 3a.

  In the print defect inspection circuit 4, the density correction circuit 21 corrects the density of the image on the printing paper based on the signal output from the ink density calculation unit 92 of the CPU 11. The reference image memory 22 stores an image of a non-defective printing paper surface scanned by the optical image sensor 2a as a reference image. The difference circuit 23 calculates a difference between the image on the printing paper surface scanned by the optical image sensor 2 a and the reference image stored in the reference image memory 22. The edge image generation circuit 24 creates an edge image of the printing paper. The edge mask circuit 25 uses the edge image created by the edge image generation circuit 24 to mask a portion that tends to fluctuate with respect to the spatial movement of the printing paper, and cancels the fluctuation. The first comparison circuit 26, the second comparison circuit 27, and the third comparison circuit 28 detect a preset image defect based on the output from the edge mask circuit 25, and send it to the defect determination logic unit 91 of the CPU 11. Output defect information. For example, the first comparison circuit 26 detects stains due to ink, oil, dripping, etc., the second comparison circuit 27 detects ink fading, and the third comparison circuit 28 detects white spots caused by wear of the printing plate. It is good to set to detect. The print defect inspection circuit 4 is configured to include three comparison circuits, but may of course be configured to include a plurality of comparison circuits. The mark position detection circuit 29 captures a reference image with the optical image sensor 2a and stores the image in the reference image memory 22, and the color mark, the registration mark, the non-bleb mark, the cut-off mark printed on the continuous paper P It detects the position of a symbol such as a barcode symbol including a one-dimensional symbol and a two-dimensional symbol and a specific character on the paper surface, and outputs the information to the cut-out position designation logic unit 99. Based on this information, the cutout position designation logic unit 99 outputs information for designating a registration mark or a nonbleb mark cutout position to the misregistration detection circuit 6 or the noble check circuit 7 as described later. Accordingly, the position of each mark can be automatically set without the operator inputting and setting the position of each mark.

  In the color tone monitoring circuit 5, the mark position cutout circuit 31 prints with the ink of each color from the image of the continuous paper P captured by the optical image sensor 2 a based on the position information of the color mark output from the cutout position designation logic unit 99 of the CPU 11. An image of a predetermined area including the color mark is cut out, and this image is output to the ink density calculation unit 92 of the CPU 11.

  In the registration error detection circuit 6, the mark position extraction circuit 41 is based on the registration mark position information output from the extraction position designation logic unit 99 of the CPU 11, and the ink of each color from the image of the continuous paper P imaged by the optical image sensor 2 a. The image of the predetermined area including the registration mark printed in (1) is cut out, and this image is output to the misregistration calculation unit 94 of the CPU 11.

  In the noble check circuit 7, the character position cutout circuit 51 is based on the registration mark position information output from the cutout position designation logic unit 99 of the CPU 11, and prints each plate from the image of the continuous paper P captured by the optical image sensor 2 a. An image of a predetermined area including the noble mark is cut out, and this image is output to the noble mark reading unit 95 of the CPU 11.

  In the character / symbol detection circuit 8, the character / symbol extraction circuit 61 is a continuous paper imaged by the optical image sensor 2 a based on the position information of a specific character or a specific symbol output from the extraction position designation logic unit 99 of the CPU 11. An image of a predetermined area including a specific character or symbol is cut out from the P image, and this image is output to the character / symbol reading unit 96 of the CPU 11.

  In the cut-off detection circuit 9, the mark position cut-out circuit 71 cuts off the image of the continuous paper P captured by the optical image sensor 2 a based on the cut-off mark position information output from the cut-out position designation logic unit 99 of the CPU 11. An image of a predetermined area including the mark is cut out, and this image is output to the cut-off mark reading unit 97 of the CPU 11.

  In the paper flow detection circuit 10, the paper edge position cutout circuit 81 is an image of the continuous paper P captured by the optical image sensor 2 a based on the position information of the edge of the printed pattern output from the cutout position designation logic unit 99 of the CPU 11. The image of a predetermined region including the edge of the continuous paper P and the edge of the printed pattern is cut out from the image, and this image is output to the paper flow amount calculation unit 98 of the CPU 11.

  In the CPU 11, the defect determination logic unit 91 detects that the defect information of the image on the printing paper surface is output from any of the first comparison circuit 26, the second comparison circuit 27, and the third comparison circuit 28 of the print defect inspection circuit 4. Then, it is determined whether or not the content of the defect is within an allowable range. And the defect determination logic part 91 outputs the signal which displays the content which notifies an operator that the defect (defect) generate | occur | produced on the display 12a of the display apparatus 12, or outputs the signal which makes the warning lamp 12b light. To do. Further, the defect determination logic unit 91 outputs a control signal to a paper discharge device (rejector) 113 provided on the downstream side of the folding machine 109 so as to remove the printed matter including the printed paper in which the defect has occurred. Further, the defect determination logic unit 91 outputs a control signal for causing the ink key control logic unit 93 to adjust the ink key adjusting device 111 in order to adjust the ink amount and correct the defect.

  The defect determination logic unit 91 is configured to output a comprehensive determination result in cooperation with other units of the CPU 11. That is, the defect determination logic unit 91 determines whether or not the content of the defect generated on the continuous paper P is within an allowable range, and if the defect is outside the allowable range, a pattern printed on the continuous paper P or the like. When determining the ink distribution amount, the adjustment amount of the ink amount is calculated in consideration of the ink concentration information output from the ink concentration calculation unit 92. Then, the defect determination logic unit 91 outputs a control signal for changing the ink amount to the ink key control logic unit 93. With this configuration, the combined printing paper surface inspection apparatus 1 can calculate the ink amount with higher accuracy than adjusting the ink amount based only on the determination result of the defect determination logic unit 91.

  In addition, when the defect determination logic unit 91 detects the misregistration notification signal output from the misregistration calculation unit 94, the cause of the defect is caused by misregistration, so the display 12a, the warning light 12b, The signal output to the paper discharge device and the ink key control logic unit 93 is suspended. As a result, it is possible to prevent erroneous detection due to misregistration.

  Next, when the ink density calculation unit 92 of the CPU 11 detects that the image data is output from the mark position cutout circuit 31 of the color tone monitoring circuit 5, it calculates the ink density of the color mark based on this image data. For example, the average pixel value a of the designated area and the average pixel number W of the blank portion are obtained, and the ink density log (W / a) is calculated based on these values. Then, the ink density calculation unit 92 outputs a signal for displaying on the display 12a of the display device 12 the content for notifying the operator that the ink density is abnormal, and also outputs a signal for lighting the warning lamp 12b. Further, if the calculated ink density is different from the reference value, the ink density calculation unit 92 outputs a control signal to the ink key control logic unit 93 to change the ink density.

  The ink density calculation unit 92 is configured to output a comprehensive determination result in cooperation with other units of the CPU 11. That is, when the ink density calculation unit 92 detects the registration error notification signal output from the positional deviation calculation unit 94 during the calculation of the ink density, the cause of the ink density shift or the color shift is the registration error. Therefore, the signal output to the display 12a, the warning lamp 12b, and the ink key control logic unit 93 is suspended. Thereby, it is possible to prevent erroneous detection of ink density shift or color shift caused by misregistration.

  Further, after calculating the ink density, the ink density calculation unit 92 outputs the information to the defect determination logic unit 91. Thereby, as described above, the defect determination logic unit 91 can determine the amount of ink to be changed comprehensively together with the ink distribution amount of a pattern or the like.

  Further, the ink density calculation unit 92 outputs the ink density information to the density correction circuit 21 of the print defect inspection circuit 4 after calculating the ink density. As a result, the print defect inspection circuit 4 can reliably detect defects without being influenced by changes in ink density.

  Next, when the position deviation calculation unit 94 of the CPU 11 detects that the image data is output from the mark position extraction circuit 41 of the registration deviation detection circuit 6, the center of gravity of the registration mark in the image area is based on this image data. To calculate how the register marks are deviated. Then, the misregistration calculation unit 94 outputs a control signal to the register adjusting device 112 of the offset rotary press 101 based on the calculation result to adjust the misalignment of the plate cylinder. Alternatively, the misregistration calculation unit 94 outputs a signal for displaying on the display 12a the content of warning that the displacement of the plate cylinder has occurred, or outputs a signal for lighting the warning lamp 12b.

  The misregistration calculation unit 94 is configured to output a comprehensive determination result in cooperation with other units of the CPU 11. That is, when the displacement of the plate cylinder has occurred, the misregistration calculation unit 94 generates a signal for notifying that the displacement of the plate cylinder (registration misalignment) has occurred and calculates the ink density. Output to the unit 92. As a result, as described above, when a printing defect due to misregistration occurs, it is possible to prevent another cause from being notified or incorrect adjustment.

  Next, when the noble mark reading unit 95 of the CPU 11 detects that the image data is output from the character position cutout circuit 51 of the noble check circuit 7, the noble mark position information output from the cutout position designation logic unit 99 is displayed. Based on this, the noble mark in the image data is recognized. Then, in the case of a different noble mark compared to the regular version information, a signal for displaying that fact on the display 12a or a signal for turning on the warning lamp 12b is output.

  When the character / symbol reading unit 96 of the CPU 11 detects that the image data is output from the character / symbol extraction circuit 61 of the character / symbol detection circuit 8, the position of the character / symbol output from the extraction position designation logic unit 99 is detected. Based on the information, a particular character or symbol in the image is recognized. If the character / symbol is different from the correct character / symbol, a signal for displaying the fact on the display 12a is output, or a signal for lighting the warning lamp 12b is output.

  When the cut-off mark reading unit 97 of the CPU 11 detects that the image data is output from the mark position cut-out circuit 71 of the cut-off detection circuit 9, the cut-off mark reading unit 97 uses the cut-off mark position information output from the cut-out position specifying logic unit 99. Based on this, the position of the cut-off mark in this image is calculated, and the positional deviation in the paper feed direction from the reference position is calculated. Then, a control signal corresponding to the amount of deviation is sent to the cut-off adjusting device 107, and the position of the adjusting roller 120 is adjusted to correct the position deviation in the paper feeding direction.

  When the paper flow amount calculation unit 98 of the CPU 11 detects that the image data is output from the paper edge position cut-out circuit 81 of the paper flow detection circuit 10, the edge of the continuous paper P in the width direction of the continuous paper P in the image and the print pattern are displayed. The margin width is measured from the end in the width direction, and the amount of deviation of the end of the paper surface at the reference position is calculated. Then, based on the calculation result, a control signal is output to the web guide devices 103 and 108 to correct the paper flow (the positional deviation in the width direction) of the continuous paper P.

  The cut-out position designation logic unit 99 of the CPU 11 includes a color mark, a register mark, a noble mark, a specific character / symbol, a bar code symbol, a cut-off mark, and an edge of the continuous paper P in the reference image detected by the mark position detection circuit 29. The position information such as the pattern printed on the continuous paper is stored. Then, the positional information is output to the color tone monitoring circuit 5, the misregistration detection circuit 6, the noble check circuit 7, the character / symbol detection circuit 8, the cutoff detection circuit 9, and the paper flow detection circuit 10.

[Second Embodiment]
Next, the configuration of the printing paper surface combined inspection apparatus according to the second embodiment of the present invention will be described. FIG. 4 is a block diagram showing a schematic configuration of a combined printing paper surface inspection apparatus according to the second embodiment of the present invention. The combined printing paper surface inspection apparatus according to the second embodiment of the present invention registers digital image data for making a printing plate as reference data, and detects defects on the printing paper surface.

  Here, the upper digital image data is information such as the design, color tone, and printing position of the upper digital image, information on the content and position of characters and bar code symbols in the image, color mark, register mark, non-bleb mark, Information on the shape and position of the cut-off mark.

  As shown in FIG. 4, the print sheet surface combined inspection apparatus 1 ′ includes a profile conversion LUT 15 and a resolution conversion circuit 16 in addition to the configuration of the print sheet surface combined inspection apparatus 1 shown in FIG. 1.

  The profile conversion LUT 15 is used when the resolution conversion circuit 16 converts the resolution of the upper digital image data for making the printing plate, so that the color conversion of the proof printing device 18 which is a device for performing trial printing after the plate making operation is completed. 3 is a look-up table (hereinafter referred to as LUT) created based on a characteristic profile and printing characteristics of the offset rotary press 101. Here, the printed matter produced by the proof printing device 18 and the printed matter produced by the offset rotary press 101 are different in the printing finish. Therefore, as described above, the profile conversion LUT 15 is created based on the color conversion characteristic profile of the proof printing device 18 and the printing characteristic information of the offset rotary press 101, and the higher-order digital image data is converted by the profile conversion LUT 15 to obtain the reference. The image which becomes becomes. Then, inspection is performed by comparing the image data obtained by imaging the printed matter by the offset rotary press 101 with the optical image sensor 2 and the reference image data converted by the profile conversion LUT 15.

  The resolution conversion circuit 16 refers to the profile conversion LUT 15 to convert the resolution of the digital image data for creating a printing plate held by the host computer 17.

  When performing a comprehensive inspection of printed matter, the printing sheet surface combined inspection apparatus 1 ′ takes in the digital image data for creating a printing plate held in the host computer 17 according to standard specifications such as CIP4, and creates an LUT. It is stored in the profile conversion LUT 15. Further, the printing paper surface composite inspection apparatus 1 ′ creates the LUT and stores the characteristics of the offset rotary press 101 and the optical image sensor 2 in the profile conversion LUT 15.

  In the combined printing paper surface inspection apparatus 1 ′, when performing a comprehensive inspection of a printed matter, the resolution conversion circuit 16 corresponds to the light collection characteristic of the optical image sensor 2 based on both profile data stored in the profile conversion LUT 15. A mask is generated, the upper digital image is averaged using the mask, and the resolution of the upper digital image is reduced to a level substantially equal to that of the optical image sensor 2. Then, the higher-order digital image with the reduced resolution is converted into a print defect inspection circuit 4, a color tone monitoring circuit 5, a misregistration detection circuit 6, a noble check circuit 7, a character / symbol detection circuit 8, a cut-off detection circuit 9, and a paper. Output to the flow detection circuit 10. Each circuit compares the higher-order digital image with the reduced resolution and the output result of the optical image sensor 2 to detect defects, monitor the color tone, and the like in the same manner as the combined paper surface inspection apparatus 1 according to the first embodiment. Perform various tests.

  Further, the printing paper surface combined inspection apparatus 1 ′ does not reduce the upper digital image to a resolution substantially equal to the image of the printing paper surface captured by the optical image sensor 2, but the image of the printing paper surface captured by the optical image sensor 2. Can be converted to a resolution substantially equivalent to that of the upper digital image. Specifically, first, the upper digital image data and various data for making the printing plate are received from the upper computer 17, and the color conversion characteristic profile of the proof printing device 18 and the profile of the optical image sensor 2 to be used are obtained. In addition, the captured image is interpolated at the same resolution as the upper digital image. That is, when the captured image is indicated by the coordinates of (i, j) and the upper digital image is indicated by the coordinates of (k, l), for example, using four-point interpolation, the post-interpolation image C (k, l) is Obtained from the captured image A (i, k) as follows.

(i ≦ k <i + 1, j ≦ l <j + 1)
C (k, l) = (k−i) (l−j) A (i + 1, j + 1) + (i + 1−k) (l−j) A (i, j + 1)
+ (K−i) (j + 1−1) A (i + 1, j) + (i + 1−1−k) (j + 1−1) A (i, j)
Comparison is performed by interpolating the captured image at the same resolution as the upper digital image.

  Then, at the time of inspection, the image data after interpolation and the output result of the higher-order image data are compared to detect a defect or a color tone shift.

The printing paper surface combined inspection apparatus 1 ′ has the following advantages compared to the printing paper surface combined inspection apparatus 1 by performing inspection based on the upper digital image and its accompanying data. That is,
(1) The printing defect inspection circuit 4 detects not only printing defects but also printing mistakes that occur when printing an image on a film or plate using the image data for plate making (upper digital image) possessed by the upper computer 17. it can.

  (2) In the misregistration detection circuit 6, the position of the registration adjustment mark is acquired from the upper data in advance, and this portion is observed from the beginning, thereby improving the misregistration detection speed and reducing waste paper. be able to.

  (3) Since the position of the noble mark can be acquired from the higher order data in the noble check circuit 7, it is possible to improve the detection speed of the noble mark, and to reduce the paper loss and time loss at the time of erroneous mounting. In addition, by comparing the screen of the entire page with the upper image data without using noble marks, it can be confirmed that the wrong plate is not installed, and the inspection mark is inserted on the printing paper. It can be used even in unfavorable applications, and the work of adding a noble mark to the upper digital image is not necessary, and the work time can be shortened. Furthermore, it is possible to use both color marks, non-bleb marks, and registration adjustment marks, and the number of inspection marks inserted can be reduced.

  (4) The cut-off position can be adjusted by measuring the print position of the pattern in the cut-off detection circuit 9 without inserting the cut-off mark.

  (5) By comparing the position of the print image with respect to the paper with the higher-order image data in the paper flow detection circuit 10, it is possible to detect a print misalignment, a paper misalignment, and the like.

  (6) In the above system, the positional relationship between the pattern of the upper image data and the pattern of the image data obtained from the optical image sensor 2 is examined, and the amount of positional deviation between them is obtained, thereby detecting the cut-off of the image and detecting the print flow. It can be performed.

  (7) In the above system, it is possible to check the positional relationship between the pattern of the upper image data and the pattern of the image data obtained from the optical image sensor 2, and check the erroneous mounting of the printing plate based on the degree of coincidence.

  (8) In the system described above, data such as a register mark position, a noble mark position, and a cut-off adjustment mark position are acquired from the upper digital image data acquired from the upper computer 17, and the misregistration detection circuit, The data read position can be designated by sending the data to the noble check circuit and the cut-off adjustment circuit.

  In this embodiment, the printing paper surface composite inspection apparatus 1 ′ includes a print defect inspection circuit 4, a color tone monitoring circuit 5, a misregistration detection circuit 6, a noble check circuit 7, a character / symbol detection circuit 8, and a cutoff detection circuit 9. And the paper flow detection circuit 10 are provided. However, the present invention is not limited to this. In other words, any configuration including at least any two of the circuits 4 to 10 may be used. Even in such a configuration, by configuring each circuit to operate in cooperation, cost and space can be reduced, maintenance and operability of the printing device can be improved, and comprehensive failure factors The malfunction can be prevented by the discrimination, and appropriate measures can be taken.

  As described above, the printing paper surface combined inspection apparatus 1 and the printing paper surface combined inspection apparatus 1 ′ of the present invention can perform a plurality of inspections and adjustments based on an image captured by one optical image sensor. The contents can be comprehensively judged and can be easily operated. Therefore, in the past, when a defect occurred in the printing paper for a certain item, a plurality of inspection / adjustment devices sometimes detected the defect. However, in the printing sheet surface combined inspection apparatus 1 of the present invention, which item caused the problem. Since whether or not a defect has occurred is immediately notified, the adjustment of the apparatus can be completed in a short time.

  Further, since one or two optical image sensors 2 may be attached to the offset rotary press 101 in order to acquire images on one or both sides of the printing paper, a plurality of optical image sensors are provided as in the conventional configuration. Therefore, it is not necessary to provide an extra paper path or guide roller in the offset rotary press 101. Further, the cost of remodeling the offset rotary press 101 due to the provision of the combined printing paper surface inspection apparatus 1 does not occur, and the maintainability of the offset rotary press 101 does not deteriorate.

1 is a block diagram showing a schematic configuration of a combined printing paper surface inspection apparatus according to a first embodiment of the present invention, and an overview of an offset rotary press. It is a general-view figure which shows the principal part of the cutoff adjustment apparatus and web guide apparatus of an offset rotary press. It is a block diagram which shows the detailed structure of a printing paper surface composite inspection apparatus. It is the block diagram which showed schematic structure of the printing paper surface combined inspection apparatus which concerns on 2nd Embodiment of this invention, and the general-view figure of the offset rotary press.

Explanation of symbols

1-printed paper surface composite inspection device, 2-optical image sensor,
3-A / D conversion device, 4-printing defect inspection circuit, 5-color tone monitoring circuit,
6-Misregistration detection circuit, 7-Noble check circuit,
8-bar code reading circuit, 9-cutoff detection circuit,
10-paper flow detection circuit, 11-CPU, 12-display device

Claims (9)

Ink amount adjusting device for adjusting the ink amount used for printing, a register adjusting device for adjusting the positional deviation of the printing plate, a cut-off adjusting device for adjusting the cutting position of the printing paper surface by changing the position of the guide roller, and the printing paper surface A printing paper surface combined inspection device that inspects a printed matter printed by a color printing machine that is equipped with a paper position adjusting device that adjusts a deviation in the width direction of the paper and performs color printing using a plurality of printing plates having different ink colors,
Imaging means for capturing an image of a running printing paper surface continuously printed by the color printer at a predetermined timing;
Storage means for storing reference image data of the printing paper;
Notification means for notifying the occurrence of a problem;
A printing paper surface combined inspection apparatus comprising: means described in at least any two of the means listed in items 1 to 9 below.
1. The defect on the printing paper surface is detected by comparing the image on the printing paper surface with the reference image, and if a defect has occurred, the notification means is informed to that effect, or the ink distribution of the pattern on the printing paper surface 1. Defect detection means for discriminating the amount and causing the ink amount adjusting device provided in the color printing machine to change the ink amount based on the discrimination result. A color mark or pattern printed at a predetermined position on the printing paper surface is extracted to detect a deviation in ink density or color with respect to the reference image. If a deviation in ink density or color occurs, the notification is made accordingly. 2. Color tone monitoring means that informs the means or causes the ink amount adjusting device provided in the color printing machine to change the ink amount. A registration mark printed at a predetermined position on the printing paper surface is extracted, a relative positional deviation between the registration marks is calculated, and if a positional deviation occurs, the notification means notifies the fact, or 3. Registration adjusting means for causing the registration adjusting device provided in the color printing machine to change the position of the printing plate based on the calculation result. If the identification information of the printing plate printed at a predetermined position on the printing paper surface is a noble mark, printing plate information, or printing information is extracted and compared with the regular information of the reference image, 4. Noble check means for informing the informing means that the printing plate has been mismounted. When a cut-off mark printed at a predetermined position on the printing paper surface is extracted and its position is calculated, and a deviation occurs between the position and the reference position of the cut-off mark at the reference position, the calculation result 5. Cut-off adjusting means for changing the cut-off position by the cut-off adjusting device provided in the color printing machine on the basis of When the edge of the pattern in the feed direction of the printing paper surface and the edge of the printing paper surface are extracted, the amount of deviation from the reference value of the width of the margin part at the reference position of the cut-off mark is measured, and a positional deviation occurs 6. Cut-off adjusting means for causing the guide roller adjusting device provided in the color printing machine to change the positional deviation of the adjusting guide roller based on the measurement result. An edge in the width direction of the printing paper surface is detected, and a deviation amount of the edge of the paper surface at the reference position is measured. 7. Paper position correcting means for causing the adjusting device to correct the misalignment. The image position on the printing paper surface is measured, and a pattern misalignment detecting means for detecting a misalignment of the printed pattern in the paper width direction, and a paper misalignment in the paper position adjusting device of the printing apparatus based on the detection result of the pattern misalignment detecting means. 8. Paper position correcting means for correcting Recognizing the barcode symbol or specific character printed on the printing paper and comparing it with the information of the regular barcode symbol or specific character in the reference image, if the barcode symbol or specific character is incorrect, Print content inspection means for informing the notification means to that effect Image data acquisition means for acquiring upper digital image data for making a printing plate;
Printing characteristic information holding means for holding color conversion characteristic information of the proof printing apparatus and printing characteristic information of the color printer;
The storage means converts the upper digital image based on both the characteristic information held by the print characteristic information holding means, and lowers the resolution of the upper digital image after the conversion almost equal to the image taken by the imaging means. The resolution adjustment means to be stored in
The printing paper surface combined inspection apparatus according to claim 1, further comprising: Image data acquisition means for acquiring upper digital image data for making a printing plate;
Printing characteristic information acquisition means for holding color conversion characteristic information of the proof printing apparatus and printing characteristic information of the color printer;
Based on the both characteristic information acquired by the print characteristic information holding unit, the resolution of the image on the printing paper image captured by the image capturing unit is converted to be substantially equal to the upper digital image and stored in the storage unit Adjusting means;
The printing paper surface combined inspection apparatus according to claim 1, further comprising:   The printing sheet surface combined inspection according to any one of claims 1 to 3, wherein the registration adjusting unit outputs a correction signal that causes the imaging unit to change an imaging timing based on the calculation result when a positional deviation occurs. apparatus.   The printing sheet surface combined inspection apparatus according to any one of claims 1 to 3, wherein the registration adjustment unit causes the defect detection unit to suspend notification that a defect has occurred in the notification unit when a positional deviation occurs. .   The registration adjusting means causes the color tone monitoring means to notify the notifying means of the occurrence of ink density or color misalignment, or causes the ink amount adjusting device to change the ink amount when a positional deviation occurs. The combined printing paper surface inspection apparatus according to any one of claims 1 to 3, wherein this is suspended. When the defect detection means detects a defect that has occurred on the printing paper surface,
In addition to the result of determining the ink distribution amount of the pattern on the printing paper surface, the color tone monitoring unit is provided in the color printer based on the result of detecting the ink density or color deviation by reading the pattern on the printing paper surface. The printing paper surface combined inspection apparatus according to any one of claims 1 to 3, wherein the ink amount is changed by an ink amount adjusting device.   The defect detection means recognizes the arrangement of the pattern on the entire printing paper surface, recognizes at least one of the color mark, the register mark, the noble mark, and the cut-off mark, and the color tone monitoring means, 4. The position according to claim 1, wherein the position is set in any one of the register adjustment unit, the noble check unit, and the cutoff adjustment unit that detects and operates a recognized mark. 5. Printed paper surface combined inspection device. When the color tone monitoring means detects an ink density or color shift, it outputs a detection result to the defect detection means,
4. The printing paper surface composite according to claim 1, wherein the defect detection unit corrects the density of an image captured by the imaging unit based on the detection result, and compares the image with the reference image. Inspection device.

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