JP2005305658A - Anti-ink adhesion power judging method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely judge the deterioration of an anti-ink adhesion member. <P>SOLUTION: A carrying paper is pressed against the surface of the anti-ink adhesion member installed on the peripheral surface of a rotor. For example, if the rotor is an impression cylinder 3, a rubber blanket cylinder 2 is brought into contact with the impression cylinder 3 under pressure and a paper is run between the rubber blanket cylinder 2 and the impression cylinder 3 under this state (a set-off on cylinder state). In this case, if ink adhered to the front surface of an impression cylinder plate (the anti-ink adhesion member) 8, the ink is transferred to the paper. By picturizing the surface of the paper pressed against the impression cylinder plate 8 with cameras 21, the adhesional area of the ink adhering to the paper is calculated from the image data of this picturized paper so as to judge the anti-ink adhesion power of the impression cylinder plate 8 from the calculated adhesional area of the ink. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ink adhesion preventing performance judging method and apparatus for judging the ink adhesion preventing performance of an ink adhesion preventing member having a surface for preventing ink adhesion.

  FIG. 74 is a diagram showing a schematic configuration of a printing mechanism in an offset rotary printing press. In the figure, 1 is a plate cylinder on which a printing plate is mounted, 2 is a rubber cylinder, 3 is an impression cylinder, and 4 is a transfer cylinder. In this printing mechanism, the ink is transferred from the plate cylinder 1 to the rubber cylinder 2, and is then crimped and transferred to the paper 6 fed between the rubber cylinder 2 and the impression cylinder 3, so that the ink image 7 is formed on the paper 6. It is formed.

  Usually, as the impression cylinder 3, the surface of the metal cylinder surface-finished by chrome plating is used. When printing is performed with a double-sided dedicated printing machine (for example, see Patent Document 1) provided with the impression cylinder 3, the paper 6 on which the ink image 7 is formed on the first surface (front surface) is the next step. When the ink image 7 is fed between the rubber cylinder 2 and the impression cylinder 3 having the same structure as that shown in FIG. As a transition. For this reason, the ink image 7 ′ transferred to the peripheral surface of the impression cylinder 3 is transferred again to the surface of the sheet 6 that is subsequently fed, and the surface of the sheet 6 becomes dirty, resulting in a decrease in print quality.

  This problem also occurs when duplex printing is performed with a reversing machine. In the reversing machine (see, for example, Patent Document 2), the first surface (front surface) of the printed paper 6 becomes the second surface (back surface) after reversal, and printing is performed on the surface of the reversed paper 6. . In this case, when the inverted paper 6 is fed between the rubber cylinder 2 and the impression cylinder 3 (see FIG. 76), the ink image 7 printed on the back surface of the paper 6 is formed on the circumferential surface of the impression cylinder 3. Transfer as ink image 7 '. For this reason, the ink image 7 ′ transferred to the peripheral surface of the impression cylinder 3 is transferred again to the back surface of the paper 6 that is subsequently fed, and the back surface of the paper 6 becomes dirty, resulting in a decrease in print quality.

  Also, in the case of single-sided printing, the size of the paper 6 to be used ranges from a wide one to a narrow one. When printing on a narrow paper 6 as shown in FIG. The rubber cylinder 2 and the impression cylinder 3 are in direct contact with each other at the non-existing width portion, so that slight dirt on the plate cylinder 1 is transferred to the impression cylinder 3 through the rubber cylinder 2, and the peripheral surface of the impression cylinder 3 Is dirty. Next, when the wide sheet 6 passes while the impression cylinder 3 is dirty, the dirt on the impression cylinder 3 adheres to the sheet 6 and the stain occurs.

  Therefore, recently, as shown in FIG. 78, an ink adhesion preventing member 8 having a surface for preventing the adhesion of ink is mounted on the peripheral surface of the impression cylinder 3 to prevent the paper 6 from being stained. The transfer cylinder, the discharge cylinder, the reversing cylinder, and the like are also stained by the ink after printing. For this reason, an ink adhesion preventing member may be attached to the peripheral surfaces of these cylinders as well as the impression cylinders. As described above, the ink adhesion preventing member may be attached not only to the impression cylinder but also to other cylinders. The ink adhesion preventing member attached to the peripheral surface of the impression cylinder is particularly called an impression cylinder plate. The ink adhesion preventing member is described in Patent Document 3, for example. In the ink adhesion preventing member (plate) disclosed in Patent Document 3, a metal spray layer and a composite coating film composed of a ceramic spray layer and a low surface energy resin layer are formed on a metal plate material. . A method for attaching the impression cylinder plate to the impression cylinder is described in Patent Document 4.

JP-A-11-105249 Japanese Patent Laid-Open No. 10-58654 JP-A-8-12151 JP-A-63-145032 JP-A-2-163879

However, just because the ink adhesion preventing member is mounted, the ink cannot be completely repelled there. Ink gradually adheres to the surface of the ink adhesion preventing member, and the surface gradually deteriorates. For this reason, when the surface deteriorates to some extent, it must be replaced with a new ink adhesion preventing member.
Conventionally, an operator sees the degree of dirt on a picture printed on a sheet, determines the deterioration of the attached ink adhesion preventing member based on experience and intuition, and replaces it with a new one. For this reason, skill is required for the operator and a large burden is applied. Further, if the determination of deterioration of the ink adhesion preventing member is mistaken, printing may be continued while the ink adhesion preventing member is deteriorated, and a large amount of paper loss may occur.

  The present invention has been made to solve such problems, and an object of the present invention is to provide an ink adhesion prevention performance judgment method and apparatus capable of easily and reliably judging the deterioration of the ink adhesion prevention member. It is to provide.

  In order to achieve such an object, the first invention (the invention according to claim 1) includes a step of rotating a rotating body having an ink adhesion preventing member mounted on a peripheral surface thereof, and an ink adhesion of a sheet to be conveyed. A step of pressing against the surface of the prevention member, a step of imaging the surface pressed against the ink adhesion prevention member of the paper, a step of determining the adhesion area of the ink attached to the paper from the image data of the captured paper, And a step of determining the ink adhesion preventing performance of the ink adhesion preventing member from the obtained ink adhesion area of the paper.

  In the present invention, the rotator refers to a cylinder to which ink may adhere such as an impression cylinder, a transfer cylinder, a paper discharge cylinder, and a reversing cylinder. In the present invention, the sheet to be conveyed is pressed against the surface of the ink adhesion preventing member mounted on the peripheral surface of the rotating body. For example, if the rotating body is an impression cylinder, the rubber cylinder is brought into pressure contact with the impression cylinder, and the paper is passed between the rubber cylinder and the impression cylinder in this state (cylinder insertion state). At this time, if ink adheres to the surface of the ink adhesion preventing member, the ink is transferred to the paper. In the present invention, the surface pressed against the ink adhesion preventing member of the paper (the surface on which the ink is transferred) is imaged, and the adhesion area of the ink adhering to the paper is determined from the image data of the imaged paper, The ink adhesion preventing performance of the ink adhesion preventing member is determined from the obtained ink adhesion area.

  Note that the surface of the sheet pressed against the ink adhesion preventing member may be imaged online (imaged during conveyance) or offline. For example, in the case of off-line, after the paper pressed against the ink adhesion preventing member is discharged, the operator carries the paper to the measuring instrument and images it there.

In the present invention, the ink adhesion preventing performance of the ink adhesion preventing member is determined as follows, for example.
(1) The obtained ink adhesion area is compared with a predetermined allowable area, and when the ink adhesion area is larger than the allowable area, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. (Second invention: Invention according to claim 2).
(2) Obtain the ink adhesion area ratio that adheres to the paper from the determined ink adhesion area, and compare the ink adhesion area ratio with a predetermined allowable area ratio. When it is larger than the allowable area ratio, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated (third invention: invention according to claim 3).

In the present invention, the adhesion area of the ink on the paper is determined as follows, for example.
(1) The image data of the imaged paper is binarized, and the adhesion area of the ink adhering to the paper is obtained from the binarized image data (fourth invention: invention according to claim 4).
(2) The image data of the imaged paper is binarized, and the area of the area where ink is continuously applied is obtained from the binarized image data. Comparison is made with a predetermined threshold value, and only the area where the area where the ink is continuously adhered is larger than the threshold value is extracted, and the total of the extracted areas is defined as the ink adhesion area (fifth invention: Invention according to claim 5).
In the present invention, by performing binarization processing, light stains due to paper rubbing or the like are eliminated, and it is possible to reliably detect only a range where ink has adhered. In addition, by extracting only the area where the area where the ink is continuously applied is larger than the threshold, and making the sum of the extracted areas the ink adhesion area, small black spots generated on the paper at the time of papermaking are mistakenly detected. Addition can be eliminated.

  A sixth invention (invention according to claim 6) is a method of rotating a rotating body having an ink adhesion preventing member mounted on its peripheral surface, and a plurality of sheets of paper to be conveyed on the surface of the ink adhesion preventing member in order. A step of pressing, a step of imaging a surface pressed against an ink adhesion preventing member of a plurality of sheets, a step of determining an adhesion area of ink adhered to the sheet from the image data of the captured sheet, and Comparing the ink adhering area of the paper and the predetermined permissible area, and determining the order of pressing against the ink adhering prevention member of the first paper where the ink adhering area is smaller than the allowable area; The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion prevention performance of the ink adhesion preventing member has deteriorated. It is provided with a a process.

  In the present invention, a plurality of sheets to be conveyed are sequentially pressed against the surface of the ink adhesion preventing member mounted on the peripheral surface of the rotating body. For example, if the rotating body is an impression cylinder, the rubber cylinder is brought into pressure contact with the impression cylinder, and a plurality of sheets are sequentially passed between the rubber cylinder and the impression cylinder in this state (cylinder insertion state). At this time, if ink adheres to the surface of the ink adhesion preventing member, the ink is transferred to the paper. In the present invention, the surface of the plurality of papers pressed against the ink adhesion preventing member (the surface on which the ink has been transferred) is imaged, and the adhesion area of the ink adhering to the paper from the image data of the imaged paper The ink adhesion prevention performance of the ink adhesion prevention member is determined from the obtained ink adhesion area as follows.

  Usually, the ink adhesion area decreases in the order in which the sheets are fed. If the ink adhesion preventing performance of the ink adhesion preventing member is high, the amount of ink adhering is small, so that the ink adhesion area decreases and stabilizes with a small number of sheets. On the other hand, if the ink adhesion preventing performance of the ink adhesion preventing member is low, the amount of ink adhering is large. Therefore, a large number of sheets are required until the ink adhesion area is lowered and stabilized. In the present invention, based on this principle, the ink adhesion area of the obtained paper is compared with a predetermined allowable area, and the ink adhesion prevention of the first paper in which the ink adhesion area becomes smaller than the allowable area is prevented. The order (Nx) pressed against the member is obtained. Then, the obtained rank is compared with a predetermined permissible rank (Nth), and when the obtained rank is behind the permissible rank (Nx> Nth), the ink adhesion prevention performance of the ink adhesion prevention member. Is judged to have deteriorated. In this sixth aspect of the invention, the deterioration of the ink adhesion prevention performance is judged by the ink adhesion area, but it may be judged by the ink adhesion area ratio (seventh invention: invention according to claim 7).

  The eighth invention (the invention according to claim 8) comprises a step of rotating a rotating body having an ink adhesion preventing member mounted on its peripheral surface, and a plurality of sheets of paper to be conveyed in order on the surface of the ink adhesion preventing member. The step of pressing, the step of imaging the surface pressed against the ink adhesion prevention member of the paper pressed in a predetermined order, and the adhesion area of the ink attached to the paper from the image data of the captured paper The ink adhesion prevention performance of the ink adhesion prevention member is compared when the ink adhesion area of the obtained paper is compared with the predetermined allowable area and the ink adhesion area is larger than the allowable area. And a step of determining that the deterioration has occurred.

  In this invention, the surface pressed against the ink adhesion prevention member of the paper pressed in a predetermined order is imaged, and the adhesion area of the ink adhering to the paper is obtained from the image data of the imaged paper. It is done. Usually, the ink adhesion area decreases in the order in which the sheets are fed. If the ink adhesion preventing performance of the ink adhesion preventing member is high, the amount of ink adhering is small, and therefore, the ink adhesion area of the paper in a predetermined order is reduced. On the other hand, if the ink adhesion preventing performance of the ink adhesion preventing member is low, the amount of ink adhering is large, and therefore, the ink adhesion area of the paper of a predetermined order increases. In the present invention, based on this principle, the ink adhesion area of a predetermined number of sheets among a plurality of sheets is compared with a predetermined allowable area, and the ink adhesion area is more than the allowable area. If it is too large, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. In the eighth invention, the deterioration of the ink adhesion prevention performance is judged by the ink adhesion area, but it may be judged by the ink adhesion area ratio (the ninth invention: the invention according to claim 9).

  In the first to ninth inventions described above, the deterioration of the ink adhesion prevention performance is judged by the ink adhesion area and the ink adhesion area ratio, but the ink adhesion prevention performance is determined by the ink non-adhesion area and the ink non-adhesion area ratio. Deterioration may be judged (10th to 18th inventions: inventions according to claims 10 to 18). The present invention can also be configured as an apparatus to which the methods of the first to eighteenth inventions are applied (the nineteenth to thirty-sixth inventions: the inventions according to claims 19 to 36).

  According to the present invention, the surface of the paper pressed against the ink adhesion preventing member is imaged, and the adhesion area of the ink adhering to the paper or the non-adhesion area of the ink is obtained from the image data of the imaged paper. Ink based on the determined ink adhesion area (including the ink adhesion area ratio determined from the ink adhesion area) and the ink non-adhesion area (including the ink non-adhesion area ratio determined from the ink non-adhesion area) Since the ink adhesion prevention performance of the adhesion prevention member is determined quantitatively, the deterioration of the ink adhesion prevention member can be judged easily and reliably, eliminating the need to hire skilled operators and There is no risk of large amounts of paper.

Hereinafter, the present invention will be described in detail with reference to the drawings.
[Dedicated duplex printing machine]
FIG. 1 is a schematic configuration diagram showing an example of a printing machine used for carrying out the ink adhesion prevention performance judging method of the present invention. This printing machine is a four-color dedicated duplex printing machine.

  In the drawing, 9 is a paper feeding unit, 10 is a printing unit, and 11 is a paper discharge unit. The topmost impression cylinder 3-1 of the printing unit 10 has a sheet ( Paper) is fed through the register board 12, the swing gripper device 13, and the transfer cylinder 14. From the last impression cylinder 3-8 of the printing unit 10, the sheet after printing is passed through the conveyance cylinder 15. Then, the paper is transferred to the paper discharge cylinder 16 and is discharged from the pile gripper 17 onto the pile plate of the pile lifting device 18 from here.

  The printing unit 10 includes four front side printing units 19A to 19D and four back side printing units 20A to 20D. The first to fourth color front side printing units 19 </ b> A to 19 </ b> D are formed by providing a rubber cylinder 2, a plate cylinder 1, and an ink part 5 on the top of the impression cylinder 3. The units 20 </ b> A to 20 </ b> D are formed by providing a rubber cylinder 2, a plate cylinder 1, and an ink part 5 at the lower part of the impression cylinder 3.

  In the printing unit 10, the front side printing units 19A to 19D and the back side printing units 20A to 20D are the first color back side printing unit 19A next to the first color side printing unit 20A, and the next. The second color front side printing units 19B are alternately arranged.

  In this dedicated duplex printing machine, the sheet is transferred from the transfer cylinder 14 to the impression cylinder 3-1 of the first color surface side printing unit 19 </ b> A, the first color is printed on the surface, and then the first color is printed. The first color is transferred to the impression cylinder 3-2 of the back side printing unit 20A, and the first color is printed on the back side. Thereafter, similarly, the second to fourth color front side printing units 19B to 19D and the second to fourth color back side printing units 20B to 20D are alternately arranged on the front and back sides of the sheet. A fourth color is printed.

  An impression cylinder plate 8 is mounted on the peripheral surfaces of the impression cylinders 3-1 to 3-8 of this dedicated duplex printing machine. In this example, the pressure drums 3-1 to 3-8 are divided into the peripheral surfaces and two pressure drum plates 8 are mounted. However, one pressure drum is provided around the entire circumference of the pressure drums 3-1 to 3-8. Needless to say, the plate may be mounted. Further, the impression cylinder plate 8 is as shown in Patent Document 3, and has a surface that prevents adhesion of ink. Moreover, since the mounting method to the impression cylinders 3-1 to 3-8 of the impression cylinder plate 8 is described in Patent Document 4, description thereof is omitted here.

 Further, cameras 21-1 to 21-8 are provided for the impression cylinders 3-1 to 3-8 of the dedicated duplex printing machine. For example, the camera 21-1 with respect to the impression cylinder 3-1 is provided at a position in contact with the peripheral surface of the impression cylinder 3-2 between the impression cylinder 3-1 and the rubber cylinder 2-2. The cameras 21-2 to 21-7 with respect to the impression cylinders 3-2 to 3-7 are also provided at the same positions as the camera 21-1. The camera 21-8 with respect to the impression cylinder 3-8 is provided at a position in contact with the peripheral surface of the conveyance cylinder 15 between the impression cylinder 3-8 and the discharge cylinder 16.

〔Reversing machine〕
FIG. 2 is a schematic configuration diagram showing another example of a printing press used for carrying out the ink adhesion preventing performance judging method of the present invention. This printing press is a sheet-fed rotary printing press with a reversing mechanism capable of selecting single-sided printing or double-sided printing.

  In the figure, reference numeral 22 denotes a reversing cylinder, which is provided between the impression cylinder 3-2 of the second color printing unit 23B and the impression cylinder 3-3 of the third color printing unit 23C in contact with both cylinders. . In the case of single-sided printing, the sheet is transferred to the impression cylinder 3-3 of the printing unit 23C for the third color without being inverted by the inversion cylinder 23. In the case of duplex printing, the sheet is reversed by the reversing cylinder 23 and transferred to the impression cylinder 3-3 of the third color printing unit 23C. That is, the first surface (front surface) of the sheet printed by the first color printing unit 23A and the second color printing unit 23B is reversed by the reversing cylinder 22 to become the second surface (back surface). The sheet is delivered to the impression cylinder 3-3 of the third color printing unit 23C.

  An impression cylinder plate 8 is mounted on the peripheral surface of the impression cylinders 3-1 to 3-4 of the sheet-fed rotary printing press with the reversing mechanism. Further, cameras 21-1 to 21-4 are provided for the impression cylinders 3-1 to 3-4. For example, the camera 21-1 with respect to the impression cylinder 3-1 is provided at a position in contact with the peripheral surface of the transfer cylinder 4-1 of the sheet transfer section from the impression cylinder 3-1 to the transfer cylinder 4-1. ing. The cameras 21-2 to 21-4 with respect to the impression cylinders 3-2 to 3-4 are also provided at the same positions as the camera 21-1.

[Embodiment 1: Determination of ink adhesion prevention performance based on ink adhesion area]
First, as the first embodiment, a method for determining the ink adhesion prevention performance based on the ink adhesion area will be described.
FIG. 3 is a block diagram showing an ink adhesion prevention performance judging device 100 (100A) attached to the printing machine shown in FIGS.

  In FIG. 3, 101 is a CPU, 102 is a ROM, 103 is a RAM, 104 is an input device, 105 is a display, 106 is an output device (flexible disk drive, printer, etc.), 107 is a unit number U to be inspected. A setting device (unit number setting device) 108 for performing, a setting device (printing number setting device) for setting the number N of printed blank sheets of paper used for the inspection, and 109 a measurement position information P of the paper to be inspected A setting device (measurement position setting device) for performing setting, 110 is a rotary encoder that generates clock pulses as the driving motor of the printing press rotates, and 111 is a measurement position counter that counts clock pulses from the rotary encoder 110. , 112 is a measuring instrument, 113 is an A / D converter that converts an analog signal from the measuring instrument 112 into a digital signal. , 114-120 the output interface (I / O, I / F), M1~M15 is a memory. The measuring instrument 112 corresponds to the cameras 21-1 to 21-8 in the printing press shown in FIG. 1, and corresponds to the cameras 21-1 to 21-4 in the printing press shown in FIG. The input device 104 is provided with a start switch SW1.

  The CPU 101 obtains various input information given through the interfaces 114 to 120 and operates according to a program stored in the ROM 102 while accessing the RAM 103. The ROM 102 stores a program (ink adhesion prevention performance judgment program) for judging the ink adhesion prevention performance of the impression cylinder plate 8 mounted on the peripheral surface of the impression cylinder 3 in the printing press. The ink adhesion prevention performance determination program may be provided in a state where it is recorded on a recording medium such as a CD-ROM, and may be read from the recording medium and installed on the hard disk.

The unit number U to be inspected set via the unit number setting unit 107 is written in the memory M1.
In the memory M2, the number N of blank sheets to be used for the inspection set through the print number setting unit 108 is written.
In the memory M3, measurement position information P of a sheet to be inspected set through the measurement position setting unit 109 is written.

In the memory M4, the count value Cps of the measurement position counter 111 corresponding to the measurement position information P of the paper to be inspected is written.
The current count value Cpr of the measurement position counter 111 is written in the memory M5. The measurement position counter 111 is reset by a zero pulse from the rotary encoder 110 every time the rotation angle of the printing press returns to the origin.

In the memory M6, image data Z1-1 to Zn-m from the measuring instrument 112 described later are stored.
The memory M7 is written with a threshold level th1 for binarizing the image data Z1-1 to Zn-m stored in the memory M6.
The memory M8 stores image data Z1-1 ′ to Zn-m ′ binarized using the threshold level th1 in the memory M7.

In the memory M9, a Sobel differential value obtained by performing a Sobel differential described later on the image data Z1-1 ′ to Zn-m ′ stored in the memory M8 is written.
In the memory M10, an edge determination reference value eth used when performing an edge determination based on the Sobel differential value written in the memory M9 is written.
The memory M11 stores an edge (binarization level “1”) extracted using the edge determination reference value eth in the memory M10.

In the memory M12, the ink adhesion portion determination area Sth is written.
In the memory M13, for each edge in the memory M11, an area S in a range surrounded by the edge is written.
In the memory M14, a total value (total area of ink adhering portions) ST of an area S in a range surrounded by all edges in the memory M11 is written.
In the memory M15, an ink adhesion prevention performance determination reference area STth is written.

  FIG. 4 is a block diagram showing a printing press control apparatus 200 attached to the printing press shown in FIGS. The printing press control device 200 exchanges signals with the ink adhesion prevention performance determination device 100A described above.

  In FIG. 4, 201 is a CPU, 202 is a ROM, 203 is a RAM, 204 is a sheet feed number detector that sends a single sheet feed detection signal each time a sheet is fed to the printing machine, and 205 A paper feed number counter that counts a paper feed detection signal from the paper feed number detector 204, 206 is a driving motor of the printing machine, 207 is a driver for the driving motor 206, and 208 is a digital signal to the driver 207 as an analog signal. A D / A converter for converting to 209, a rotary encoder 209 for generating clock pulses as the driving motor 206 rotates, a counter 210 for detecting a rotational phase for counting clock pulses from the rotary encoder 209, and a sheet feeding device 211 , 212 is a sheet feeding device driving circuit for driving the sheet feeding device 211, and 213 is a cylinder attaching / detaching device provided for each printing unit. Cylinder throw apparatus driving circuit provided for each printing unit 214, 215 is the internal clock counter, is 216 to 221 input and output interface (I / O, I / F), M31~M35 is a memory.

  The CPU 201 obtains various input information given via the interfaces 216 to 221, and operates according to a program stored in the ROM 202 while accessing the RAM 203. The ROM 202 stores a program (ink adhesion prevention performance judgment support program) that supports judgment of the ink adhesion prevention performance in the ink adhesion prevention performance judgment apparatus 100A. The ink adhesion prevention performance determination support program may be provided in a state where it is recorded on a recording medium such as a CD-ROM, and may be read from the recording medium and installed on the hard disk.

In the memory M31, the unit number U to be inspected sent from the ink adhesion preventing performance judging device 100A is written.
In the memory M32, the number N of blank sheets printed on the sheet used for the inspection sent from the ink adhesion prevention performance determination device 100A is written.
In the memory M33, the cylinder insertion timing of the printing unit to be inspected, which is calculated by the CPU 201, is written.
In the memory M <b> 34, the cylinder removal timing of the printing unit to be inspected calculated by the CPU 201 is written.
In the memory M35, the idling time t1 when the driving motor 206 is stopped is written.

  In the printing press control apparatus 200, the rotation phase detection counter 210 is reset by a zero pulse from the rotary encoder 209 every time the rotation angle of the printing press returns to the origin. Further, the rotary encoder 209 of the printing press control apparatus 200 is also used as the rotary encoder 110 of the ink adhesion prevention performance judging apparatus 100 shown in FIG.

  Hereinafter, according to the flowcharts shown in FIGS. 5 to 9, characteristic operations in the ink adhesion prevention performance determination device 100 </ b> A and the printing press control device 200 will be described. 5 to 7 are flowcharts showing divided processes performed in the ink adhesion prevention performance judging apparatus 100A, and FIGS. 8 and 9 are flowcharts showing divided processes in the printing press control apparatus 200. It is.

[Unit number, number of blank pages printed, measurement position information input and setting, image data reading and storage]
After the printing is completed, the unit number U of the object to be inspected by the unit number setting unit 107 of the ink adhesion prevention performance judging apparatus 100A, the number N of blank papers to be used for the inspection by the number-of-printing number setting unit 108, and the measurement position setting unit 109 The measurement position on the paper is input as the measurement position information P of the paper to be inspected.

  The CPU 101 of the ink adhesion prevention performance judging device 100A measures the unit number U from the unit number setting unit 107 in the memory M1, the blank sheet printing number N from the printing number setting unit 108 in the memory M2, and the measurement from the measurement position setting unit 109. The position information P is written into the memory M3 (steps 301 to 310 shown in FIG. 5).

  Thereafter, when the start switch SW1 is turned on (YES in step 311), the CPU 101 reads out the unit number U from the memory M1 and the number N of blank pages to be printed from the memory M2 (steps 312 and 313). 200 (step 314).

  When the CPU 201 of the printing press control apparatus 200 confirms the reception of the unit number U and the number N of blank sheets printed from the ink adhesion prevention performance determination apparatus 100A (step 801 shown in FIG. 8), the received unit number U and the number of blank sheets printed. N is written into the memories M31 and M32 (step 802). Then, the completion of reception of the unit number U and the number N of printed white sheets is notified to the ink adhesion prevention performance judging device 100A (step 803). Also, the cylinder insertion timing is calculated from the received unit number U and written in the memory M33 (step 804). Also, the drum removal timing is calculated from the received unit number and written in the memory M34 (step 805).

  When the CPU 101 of the ink adhesion prevention performance determination device 100A confirms the completion of reception of the unit number U and the number N of printed blank pages from the printing press control device 200 (YES in step 315), it sends a printing start command to the printing press control device 200. (Step 316). When the CPU 201 of the printing press control apparatus 200 receives the print start command from the ink adhesion prevention performance determination device 100A (YES in Step 806), the CPU 201 notifies the ink adhesion prevention performance determination device 100A of the completion of reception of the print start command (Step 807). ). The CPU 101 of the ink adhesion prevention performance determination device 100A receives the notification of the completion of reception of the print start command from the printing press control device 200 (YES in step 317), and reads the measurement position information P from the memory M3 (step 318). Then, the count value Cps of the measurement position counter 111 corresponding to the measurement position is calculated from the read measurement position information P and written in the memory M4 (step 319).

  On the other hand, the CPU 201 of the printing press control apparatus 200 sends a notification of completion of reception of the print start command to the ink adhesion prevention performance determination apparatus 100A (step 807), and then sends a reset signal to the paper feed number counter 205 to feed the paper. The count value of the number counter 205 is set to 0 (step 808). Then, an activation command is sent to the paper feed device driving circuit 212 (step 809), and the supply of paper (white paper) from the paper feed device 211 to the printing press is started (step 810).

  Further, the CPU 201 reads the cylinder insertion timing from the memory M33 (step 811), and if the count value of the rotation phase detection counter 210 reaches the cylinder insertion timing (YES in step 813), reads the unit number U from the memory M31 (step 813). Step 814). Then, an arrival command signal is output to the cylinder attachment / detachment device drive circuit 214 of the printing unit specified by the read unit number U (step 815), and cylinder insertion is performed. That is, the rubber cylinder 2 is brought into pressure contact with the impression cylinder 3 of the printing unit, and printing pressure is applied to the paper passing between the impression cylinder 3 and the rubber cylinder 2. As a result, the paper being conveyed is pressed against the surface of the impression cylinder plate 8 mounted on the peripheral surface of the impression cylinder 3. At this time, if ink adheres to the surface of the impression cylinder plate 8, the ink is transferred to the paper. At the same time as the cylinder insertion, the CPU 201 transmits a cylinder insertion completion signal to the ink adhesion prevention performance determination device 100A (step 816).

  When the CPU 101 of the ink adhesion prevention performance determination device 100A receives the cylinder insertion completion signal from the printing press control device 200 (YES in step 320), the CPU 101 calculates the count value Cps of the measurement position counter 111 corresponding to the measurement position from the memory M4. Reading (step 321), and if the current count value Cpr of the measurement position counter 111 is equal to the count value Cps corresponding to the measurement position (YES in step 323), a measurement command signal is output to the measuring instrument 112 (step 324). ). As a result, the camera 21 with the camera number set via the unit number setting unit 107 in the measuring instrument 112 is operated, and a part of the surface pressed against the impression cylinder plate 8 of the conveyed sheet is moved in the conveying direction. The image is divided into n and divided into m in the left-right direction perpendicular to the transport direction. The CPU 101 takes in the image data Z1-1 to Zn-m captured by the camera 21 via the A / D converter 113 and stores it in the memory M6 (step 325).

[Binarization of image data]
Next, the CPU 101 of the ink adhesion prevention performance determination device 100A reads the threshold level th1 from the memory M7 (step 326). Then, the first image data Z1-1 stored in the memory M6 is read (step 327), and the pixel value of the read image data Z1-1 is compared with the threshold level th1 (step 328). Is equal to or higher than the threshold level th1, "1" is written to the address of the corresponding pixel in the memory M8 (step 329), and if it is lower than the threshold level th1, "0" is written to the address of the corresponding pixel in the memory M8 (step 329). Step 330). As a result, the binarized first image data (binary image data) Z1-1 ′ is stored in the memory M8.

  For the next image data Z2-1 stored in the memory M6, the CPU 101 compares the pixel value of the read image data Z2-1 with the threshold level th1 in the same manner as the first image data Z1-1. (Step 332), if the pixel value is equal to or higher than the threshold level th1, “1” is written to the address of the corresponding pixel in the memory M8 (step 333), and if the pixel value is lower than the threshold level th1, the corresponding pixel of the memory M8 is written. “0” is written to the address (step 334). As a result, the binarized next image data (binary image data) Z2-1 'is stored in the memory M8. Thereafter, in step 335, the processing in steps 331 to 335 is repeated until it is confirmed that the binarization of all the image data Z (Z1-1 to Zn-m) in the memory M6 is completed.

[Edge extraction by Sobel differentiation]
Next, the CPU 101 reads out the first binary image data Z1-1 ′ stored in the memory M8, performs a Sobel differentiation on the binary image data Z1-1 ′, and obtains a binary image obtained by the Sobel differentiation. The Sobel differential value of the pixel of data Z1-1 ′ is stored in the memory M9 (step 336). Since the Sobel differentiation is disclosed in, for example, Patent Document 5, detailed description is omitted here, but the horizontal differential value and the vertical differential are weighted by weighting the upper, lower, left and right pixels with respect to the center pixel (target pixel). The horizontal differential value | + | vertical differential value | is the Sobel differential value of the target pixel.

  The CPU 101 reads the edge determination reference value eth from the memory M10 (step 337), and compares the Sobel differential value of the pixel of the binary image data Z1-1 ′ obtained in step 336 with the edge determination reference value eth ( In step 338), if the Sobel differential value of the pixel is equal to or larger than the edge determination reference value eth, "1" is written in the corresponding pixel position in the memory M11 (step 339), and if the pixel is below the edge determination reference value eth, the memory M11 is written. “0” is written in the corresponding pixel position of (step 340).

  For the next binary image data Z2-1 ′ stored in the memory M8, the CPU 101 also performs the sobel of the pixel of the binary image data Z2-1 ′ in the same manner as the first binary image data Z1-1 ′. The differential value is compared with the edge determination reference value eth (step 343), and if the Sobel differential value of the pixel is equal to or greater than the edge determination reference value eth, "1" is written to the corresponding pixel position in the memory M11 (step 344). If it is below the edge judgment reference value eth, “0” is written in the corresponding pixel position in the memory M11 (step 345). Thereafter, in step 346, the processing in steps 341 to 346 is repeated until completion of edge extraction is confirmed for all the binary image data Z ′ (Z1-1 ′ to Zn-m ′) in the memory M8. As a result, the outer edge of each block of “1” level pixels is extracted from the binary image data Z ′ (Z1-1 ′ to Zn-m ′) as an edge, and this edge is stored in the memory M11.

  FIG. 10A shows a part of the image data Z. Each cell is a detection pixel. By applying Sobel differentiation to each pixel obtained by binarizing the image data Z and determining “1” and “0” using the edge determination reference value eth, “1” as shown in FIG. 10B is obtained. An edge EG that is a series of level pixels is extracted.

[Cut a small area of the ink adhesion part]
Next, the CPU 101 calculates the area (ink adhesion area) S of the range surrounded by the first edge in the memory M11, and stores this ink adhesion area S in the memory M13 (step 347). That is, for the edge EG shown in FIG. 10B, the number of pixels in the range surrounded by the edge EG (FIG. 10C) is counted, and the ink adhesion area (continuous ink adhesion) is counted. The area of the range) S. The area S of the range surrounded by the edges can be obtained by using, for example, analysis software of “Image-ProPLUS (Planetron Co., Ltd.)”.

  Then, the ink adhesion portion determination area Sth is read from the memory M12 (step 348), and the read ink adhesion portion determination area Sth is compared with the ink adhesion area S obtained in step 347 (step 349). Here, if S <Sth, it is determined that the ink adhesion area S is a small area, and the edge data in the range surrounded by the first edge in the memory M11 is written from “1” to “0”. Change (step 350). Thereby, the edge in the range surrounded by the first edge disappears from the memory M11, and the small area portion of the ink adhering portion is cut.

  For the range surrounded by the next edge stored in the memory M11, the CPU 101 calculates the area S of the range surrounded by the edge in the same manner as the range surrounded by the first edge (step 351). ), The ink adhesion portion determination area Sth is compared (step 353), and if S <Sth, the edge data in the range surrounded by the next edge in the memory M11 is rewritten from “1” to “0”. (Step 354). As a result, the edge in the range surrounded by the next edge disappears from the memory M11, and the small area portion of the ink adhering portion is cut. Thereafter, in step 355, the processing of steps 351 to 355 is repeated for the range surrounded by all edges in the memory M11 until the calculation of the area S of the range surrounded by the edges is confirmed.

[Determination of ink adhesion prevention performance]
Next, the CPU 101 sums up the area S of the range surrounded by all the edges in the memory M11 (edges left by cutting a small area portion of the ink adhering portion), and this sum ST is used as the ink adhering portion. Are stored in the memory M14 as the total area (step 356). Then, the ink adhesion prevention performance judgment reference area STth is read from the memory M15 (step 357), and the read ink adhesion prevention performance judgment reference area STth is compared with the total area ST of the ink adhesion portion obtained in step 356 (step 357). 358). Here, if ST <STth, “no ink adhesion prevention performance problem” is displayed on the display unit 105 (step 359), and if ST ≧ STth, “indication of ink adhesion prevention performance problem” is displayed on the display unit 105. Display (step 360).

  On the other hand, the CPU 201 of the printing press control apparatus 200 reads the number N of blank sheets to be printed from the memory M32 (step 817) after transmitting the cylinder insertion completion signal to the ink adhesion prevention performance determination apparatus 100A (step 816). Then, the count value of the paper feed number counter 205 is read (step 818). If the count value of the paper feed number counter 205 reaches the number N of blank paper prints (YES in step 819), the paper feed device drive circuit 212 is reached. A stop command is sent to the printer (step 820), and the paper feeding to the printing press is stopped.

  Then, the drum removal timing is read from the memory M34 (step 821), the count value of the rotation phase detection counter 210 is read (step 822), and if the count value becomes the drum removal timing (YES in step 823), the memory. The unit number U to be inspected is read from M31 (step 824), and a removal command signal is sent to the cylinder attachment / detachment device drive circuit 214 of the printing unit specified by this unit number U (step 825). As a result, the rubber cylinder 2 is separated from the impression cylinder 3 of the printing unit, and the pressure contact of the rubber cylinder 2 with the impression cylinder 3 is released.

  Then, the CPU 201 starts the count operation of the internal clock counter (measurement time counter) 215 (step 826), reads the idling time t1 at the time of stop from the memory M35 (step 827), and the count value of the internal clock counter stops. When the idle running time t1 is reached (YES in step 829), a stop command is sent to the driving motor driver 207 (step 830), the driving motor 206 is stopped, and the operation of the printing press is stopped.

[Embodiment 2: Judgment of ink adhesion prevention performance based on ink adhesion area ratio]
In Embodiment 1, the ink adhesion prevention performance is determined based on the ink adhesion area, but the ink adhesion prevention performance may be determined based on the ink adhesion area ratio. FIG. 11 shows a block diagram of the ink adhesion prevention performance judging device 100B when the ink adhesion prevention performance is judged based on the ink adhesion area ratio. In the second embodiment and the third to twelfth embodiments described later, the configuration and processing operation of the printing press control apparatus 200 are the same as those in the first embodiment (FIGS. 4, 8, and 9). Therefore, the explanation is omitted.

  In this ink adhesion prevention performance judgment device 100B, the ink adhesion prevention performance judgment standard area memory M15 is eliminated from the ink adhesion prevention performance judgment device 100A shown in FIG. 3, and the ink adhesion prevention performance judgment standard area ratio αth is used instead. A written memory M16 is provided. Further, a memory M17 in which a total area SAT in a detection area, which will be described later, is written, and a memory M18 in which the area ratio α of the ink adhesion portion is written are provided.

  Hereinafter, according to the flowcharts shown in FIGS. 12 to 14, characteristic operations in the ink adhesion prevention performance determination device 100 </ b> B will be described. FIG. 12 is a transcription of the flowchart of FIG. 5 and FIG. 13 is a transcription of the flowchart of FIG. Further, in FIG. 14, the processing from step 347 to 356 is the same as the processing from step 347 to 356 shown in FIG.

[Determination of ink adhesion prevention performance]
The CPU 101 of the ink adhesion prevention performance judging device 100B sums up the area S of the range surrounded by all the edges (the edges left by cutting the small area portion of the ink adhesion part) in the memory M11, and this total value ST is stored in the memory M14 as the total area of the ink adhering portion (step 356). Then, the total area SAT in the detection area is read from the memory M17 (step 361). Here, the total area SAT in the detection area refers to the total area of the imaging regions of the image data Z1-1 to Zn-m.

  Next, the CPU 101 calculates an area ratio (ink adhesion area ratio) α of the ink adhesion part of the paper from the total area ST of the ink adhesion part obtained in step 356 and the total area SAT in the detection area read in step 361. Calculate (α = (ST / SAT) × 100) and store it in the memory M18 (step 362). Then, the ink adhesion prevention performance judgment reference area ratio αth is read from the memory M16 (step 363), and the read ink adhesion prevention performance judgment reference area ratio αth is compared with the ink adhesion area ratio α calculated in step 362 (step 363). 364). Here, if α <αth, “no ink adhesion prevention performance problem” is displayed on the display 105 (step 365), and if α ≧ αth, “there is an ink adhesion prevention performance problem” on the display 105. It is displayed (step 366).

[Embodiment 3: Ink adhesion prevention performance judgment based on the number of ink adhesion prevention performance judgment and ink adhesion area]
Usually, the ink adhesion area decreases in the order in which the sheets are fed. If the performance of the impression cylinder plate 8 to prevent ink adhesion is high, the amount of ink adhering is small, so that the ink adhesion area decreases and stabilizes with a small number of sheets. On the other hand, if the ink adhesion prevention performance of the impression cylinder plate 8 is low, the amount of adhering ink is large, so that a large number of sheets are required before the ink adhering area decreases and stabilizes.

  In the third embodiment, based on this principle, the obtained ink adhesion area of the paper is compared with a predetermined allowable area in the order of pressing against the impression plate 8, and the ink adhesion area is larger than the allowable area. The rank (Nx) of the first paper that is pressed against the impression cylinder plate 8 of the first paper that has become smaller is obtained. Then, the obtained order is compared with a predetermined permissible order (Nth: number of ink adhesion prevention performance judgment), and when the obtained order is behind the permissible order (Nx> Nth), the impression cylinder plate 8 is judged to have deteriorated the ink adhesion prevention performance.

FIG. 15 shows a block diagram of an ink adhesion prevention performance judging device 100C when the ink adhesion prevention performance judgment is made based on the number of ink adhesion prevention performance judgment sheets and the ink adhesion area.
In addition to the configuration of the ink adhesion prevention performance judgment device 100A shown in FIG. 3, the ink adhesion prevention performance judgment device 100C includes an internal print number counter 121 and a memory M19 in which the ink adhesion prevention performance judgment number Nth is written. ing.

  In this embodiment, for the sake of explanation, the number Nth of ink adhesion prevention performance determination is set to 10. Hereinafter, according to the flowcharts shown in FIGS. 16 to 22, characteristic operations in the ink adhesion prevention performance determination device 100 </ b> C will be described.

[Unit number, number of blank pages printed, measurement position information input and setting, image data reading and storage]
In FIG. 16, the processing from step 301 to step 317 is the same as the processing from step 301 to step 317 shown in FIG.
When the CPU 101 of the ink adhesion prevention performance determination device 100C receives notification of the completion of reception of the print start command from the printing press control device 200 (YES in step 317), the count value Nr = 0 of the internal print number counter 121 is set (0). Step 367).
Then, the measurement position information P is read from the memory M3 (step 368), and the count value Cps of the measurement position counter 111 corresponding to the measurement position is calculated from the read measurement position information P and written to the memory M4 (step 369). .

  When a cylinder insertion completion signal is received from the printing press control apparatus 200 (YES in step 370), the count value Cps of the measurement position counter 111 corresponding to the measurement position is read from the memory M4 (step 371), and the measurement position counter 111 is read. If the current count value Cpr is equal to the count value Cps corresponding to the measurement position (YES in step 373), a measurement command signal is output to the measuring instrument 112 (step 374).

  As a result, the camera 21 with the camera number set via the unit number setting unit 107 in the measuring instrument 112 is operated, and a part of the surface pressed against the impression cylinder plate 8 of the conveyed sheet is moved in the conveying direction. The image is divided into n and divided into m in the left-right direction perpendicular to the transport direction. The CPU 101 captures the image data Z1-1 to Zn-m captured by the camera 21 via the A / D converter 113 and stores it in the memory M6 (step 375).

  Then, 1 is added to the count value Nr of the internal print sheet counter 121 (step 376), the blank sheet print number N is read from the memory M2 (step 377), and 1 is added to the read blank sheet print number N in step 376. The count value Nr is compared (step 378). Thereafter, the processing in steps 372 to 378 is repeated until the comparison result in step 378 is Nr = N. As a result, the set image data Z1-1 to Zn-m for the set number of blank sheets N are stored in the memory M6.

[Binarization of image data]
Next, the CPU 101 reads the threshold level th1 from the memory M7 (step 379). Further, the count value Nr of the internal print sheet counter 121 is set to 0 (step 380). Then, the first image data Z1-1 of the first sheet stored in the memory M6 is read (step 381), and the pixel value of the read image data Z1-1 is compared with the threshold level th1 (step 381). 382), if the pixel value is equal to or higher than the threshold level th1, “1” is written to the address of the corresponding pixel in the memory M8 (step 383), and if the pixel value is lower than the threshold level th1, the address of the corresponding pixel in the memory M8 is written. “0” is written (step 384). As a result, the first image data (binary image data) Z1-1 ′ of the binarized first sheet is stored in the memory M8.

  As for the next image data Z2-1 of the first sheet stored in the memory M6, the CPU 101 also sets the pixel value and threshold of the read image data Z2-1 in the same manner as the first image data Z1-1. Compared with the level th1 (step 386), if the pixel value is equal to or higher than the threshold level th1, “1” is written to the address of the corresponding pixel in the memory M8 (step 387), and if the pixel value is lower than the threshold level th1, the memory “0” is written to the address of the corresponding pixel of M8 (step 388). As a result, the next image data (binary image data) Z2-1 'of the binarized first sheet is stored in the memory M8. Thereafter, in step 389, the processing of steps 385 to 389 is repeated until it is confirmed that the binarization of all the image data Z (Z1-1 to Zn-m) of the first sheet in the memory M6 is completed. .

  When the binarization of all the image data Z1-1 to Zn-m on the first sheet is completed (YES in step 389), 1 is added to the count value Nr of the internal print number counter 121 (step 390). . Thereafter, the same processing as that of the first sheet is repeated until the comparison result in step 402 becomes Nr = N. As a result, all binary image data Z1-1 'to Zn-m' of N sheets are stored in the memory M8.

[Edge extraction by Sobel differentiation]
Next, the CPU 101 sets the count value Nr of the internal print sheet counter 121 to 0 (step 403), and reads the first binary image data Z1-1 ′ of the first sheet stored in the memory M8. Then, the Sobel differential is applied to the binary image data Z1-1 ′, and the Sobel differential value of the pixel of the binary image data Z1-1 ′ obtained by the Sobel differentiation is stored in the memory M9 (Step 404).

  Then, the edge determination reference value eth is read from the memory M10 (step 405), and the Sobel differential value of the pixel of the binary image data Z1-1 ′ obtained in step 404 is compared with the edge determination reference value eth (step 406). If the Sobel differential value of the pixel is equal to or greater than the edge determination reference value eth, “1” is written to the corresponding pixel position in the memory M11 (step 407), and if the pixel is below the edge determination reference value eth, the corresponding value in the memory M11. “0” is written in the pixel position (step 408).

  The CPU 101 also binarizes the next binary image data Z2-1 ′ of the first sheet stored in the memory M8 in the same manner as the first binary image data Z1-1 ′ of the first sheet. The Sobel differential value of the pixel of the image data Z2-1 ′ is compared with the edge determination reference value eth (step 411). If the Sobel differential value of the pixel is equal to or greater than the edge determination reference value eth, the corresponding pixel position in the memory M11. “1” is written in (Step 412), and if it is below the edge judgment reference value eth, “0” is written in the corresponding pixel position in the memory M11 (Step 413). Thereafter, in step 414, the processing in steps 409 to 414 is performed until the completion of edge extraction is confirmed for all the first binary image data Z ′ (Z1-1 ′ to Zn-m ′) in the memory M8. repeat. As a result, the outer edge of each block of “1” level pixels is extracted as an edge from the binary image data Z ′ (Z1-1 ′ to Zn-m ′) of the first sheet, and this edge is extracted from the memory M11. Is remembered.

  When the edge extraction is completed for all the binary image data Z1-1 ′ to Zn-m ′ of the first sheet (YES in step 414), 1 is added to the count value Nr of the internal print sheet counter 121. (Step 415). Thereafter, the same processing as the first sheet is repeated until the comparison result in step 429 becomes Nr = N. As a result, the edges extracted from all the binary image data Z1-1 'to Zn-m' of N sheets are stored in the memory M11.

[Cut a small area of the ink adhesion part]
Next, the CPU 101 sets the count value Nr of the internal printing sheet counter 121 to 0 (step 430), and the area (ink adhesion area) in the range surrounded by the first edge of the first sheet in the memory M11. S is calculated, and this ink adhesion area S is stored in the memory M13 (step 431). Then, the ink adhesion portion determination area Sth is read from the memory M12 (step 432), and the read ink adhesion portion determination area Sth is compared with the ink adhesion area S determined in step 431 (step 433). If S <Sth, it is determined that the ink adhesion area S is a small area, and the edge data in the range surrounded by the first edge of the first sheet in the memory M11 is “1”. To “0” (step 434). As a result, the edge in the range surrounded by the first edge of the first sheet from the memory M11 disappears, and the small area portion of the ink adhering portion is cut.

  As for the range surrounded by the next edge of the first sheet stored in the memory M11, the CPU 101 similarly to the range surrounded by the first edge, the area S of the range surrounded by the edge. Is calculated (step 435) and compared with the ink adhesion portion determination area Sth (step 437). If S <Sth, the edge of the range surrounded by the next edge of the first sheet in the memory M11 is calculated. The data is rewritten from “1” to “0” (step 438). As a result, the edge in the range surrounded by the next edge of the first sheet from the memory M11 disappears, and the small area portion of the ink adhering portion is cut. Thereafter, in step 439, for the range surrounded by all edges of the first sheet in the memory M11, the processing of steps 435 to 439 is performed until the calculation of the area S of the range surrounded by the edges is confirmed. repeat.

  When the cut processing of the small area portion of the ink adhering portion has been completed for all the binary image data Z1-1 ′ to Zn-m ′ of the first sheet (YES in step 439), the count of the internal print sheet counter 121 is reached. 1 is added to the value Nr (step 440). Thereafter, the same processing as that of the first sheet is repeated until the comparison result in step 452 becomes Nr = N.

[Determination of ink adhesion prevention performance]
Next, the CPU 101 sets the count value Nr of the internal print number counter 121 to 0 (step 453), and all the edges of the first sheet in the memory M11 (the small area portion of the ink adhering portion is cut). The area S in the range surrounded by the remaining remaining edges is summed, and this total value ST is stored in the memory M14 as the total area of the ink adhering portion of the first sheet (step 454). Then, the ink adhesion prevention performance judgment reference area STth is read from the memory M15 (step 455), and the read ink adhesion prevention performance judgment reference area STth and the total area ST of the ink adhesion portion of the first sheet obtained in step 454 are read. Are compared (step 456).

  In step 456, if ST <STth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 457), and the ink adhesion prevention performance determination sheet number Nth is read from the memory M19 (step 458). Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal print number counter 121 to which 1 is added in step 457. If Nr ≦ Nth (YES in step 459), the display “No problem with ink adhesion prevention performance” is displayed at 105 (step 460). If Nr> Nth (NO at step 459), “There is a problem with ink adhesion prevention performance” is displayed at the display 105 (step 461). .

  In this embodiment, since the number Nth of the ink adhesion prevention performance determination is 10, the display unit 105 displays the total area ST of the ink adhesion portion of the first sheet in step 456 if it is determined to be equal to or less than STth. Immediately, “no problem with ink adhesion prevention performance” is displayed (see FIG. 23A).

  In step 456, if ST ≧ STth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 462), the blank sheet print number N is read from the memory M2 (step 463), and the read blank sheet print number N is compared with the count value Nr of the internal print sheet counter 121 (step 464).

  If the count value Nr of the internal print number counter 121, that is, the current print number Nr of the paper does not reach the blank paper print number N (YES in step 464), the CPU 101 determines that all the edges of the next paper in the memory M11 The area S of the enclosed range is summed, and this total value ST is stored in the memory M14 as the total area of the ink adhering portion (step 465). Then, the ink adhesion prevention performance judgment reference area STth is read from the memory M15 (step 466), and the read ink adhesion prevention performance judgment reference area STth is compared with the total area ST of the ink adhesion portion obtained in step 465 (step 466). 467).

  In step 467, if ST ≧ STth, the process returns to step 462, and the processes in steps 462 to 467 are repeated. In step 467, if ST <STth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 468), and the ink adhesion prevention performance determination sheet number Nth is read from the memory M19 (step 458).

  Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal printing number counter 121 to which 1 is added in step 468. If Nr ≦ Nth (YES in step 459), the display unit is displayed. “No problem with ink adhesion prevention performance” is displayed at 105 (step 460). If Nr> Nth (NO at step 459), “There is a problem with ink adhesion prevention performance” is displayed at the display 105 (step 461). .

  In this embodiment, since the number Nth of ink adhesion prevention performance determination is set to 10, if ST <STth, the number of printed sheets Nr is less than 10 in step 467, that is, the printing order of the sheets is 10. If it is within the range, the display 105 displays “no problem with ink adhesion prevention performance” (see FIG. 23B). On the other hand, when the number of printed sheets Nr of ST <STth in step 467 exceeds 10, that is, when the printing order of the sheets is behind the number Nth of ink adhesion prevention performance determination, the display unit 105 displays. Is displayed as “There is a problem with ink adhesion prevention performance” (see FIG. 23C).

  In the third embodiment, when the count value Nr of the internal printing sheet counter 121 reaches the blank sheet printing number N without confirming ST <STth (NO in step 464), the CPU 101 prevents ink adhesion from the memory M19. The performance judgment number Nth is read (step 469-1), it is confirmed that Nr <Nth is not satisfied (NO in step 469-2), and “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 461). : Refer to FIG. 23 (d)). If it is confirmed in step 469-2 that Nr <Nth, “not determined” is displayed on the display 105 (step 469-3: refer to FIG. 23E).

[Embodiment 4: Ink adhesion prevention performance judgment based on the number of ink adhesion prevention performance judgment sheets and ink adhesion area ratio]
In the third embodiment, the ink adhesion prevention performance is judged based on the number of ink adhesion prevention performance judgments and the ink adhesion area, but the ink adhesion prevention performance judgment is based on the ink adhesion prevention performance judgment number and the ink adhesion area ratio. May be performed. FIG. 24 shows a block diagram of an ink adhesion prevention performance judging device 100D when the ink adhesion prevention performance judgment is made based on the number of ink adhesion prevention performance judgment number and the ink adhesion area ratio.

  In this ink adhesion prevention performance judgment device 100D, the ink adhesion prevention performance judgment reference area memory M15 is eliminated from the ink adhesion prevention performance judgment device 100C shown in FIG. A written memory M16 is provided. Further, a memory M17 in which the total area SAT in the detection area is written and a memory M18 in which the ink adhesion area ratio α is written are provided. Also in this embodiment, the number Nth of ink adhesion prevention performance judgment is set to 10.

  Hereinafter, according to the flowcharts shown in FIGS. 25 to 31, characteristic operations in the ink adhesion prevention performance determination device 100 </ b> D will be described. 25 is a flowchart of FIG. 16, FIG. 26 is a flowchart of FIG. 17, FIG. 27 is a flowchart of FIG. 18, FIG. 28 is a flowchart of FIG. The flowchart of FIG. 21 is transcribed, and the description of the process is omitted.

[Determination of ink adhesion prevention performance]
The CPU 101 sets the count value Nr of the internal print sheet counter 121 to 0 (step 453), totals the area S of the range surrounded by all edges of the first sheet in the memory M11, and this total value ST is stored in the memory M14 as the total area of the ink adhering portion of the first sheet (step 454). Then, the total area SAT in the detection area is read from the memory M17 (step 470).

  Next, the CPU 101 calculates the ink adhesion area ratio of the first sheet from the total area ST of the ink adhesion portion of the first sheet obtained in step 454 and the total area SAT in the detection area read out in step 470. α is calculated (α = (ST / SAT) × 100) and stored in the memory M18 (step 471). Then, the ink adhesion prevention performance judgment reference area ratio αth is read from the memory M16 (step 472), and the read ink adhesion prevention performance judgment reference area ratio αth and the ink adhesion area ratio α of the first sheet calculated in step 471 are read. Are compared (step 473).

  If α <αth in step 473, 1 is added to the count value Nr of the internal print sheet counter 121 (step 474), and the ink adhesion prevention performance determination sheet number Nth is read from the memory M19 (step 475). Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal printing number counter 121 to which 1 is added in step 474, and if Nr ≦ Nth (YES in step 476), the display unit “No problem with ink adhesion prevention performance” is displayed in 105 (step 477). If Nr> Nth (NO in step 476), “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 478). .

  In this embodiment, since the number Nth of ink adhesion prevention performance determination is set to 10, if it is determined in step 473 that the ink adhesion area ratio α of the first sheet is equal to or less than αth, the display 105 immediately displays “ “No problem with ink adhesion prevention performance” is displayed (see FIG. 32A).

  In step 473, if α ≧ αth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 479), the blank sheet print number N is read from the memory M2 (step 480), and the read blank sheet print number N is compared with the count value Nr of the internal print sheet counter 121 (step 481).

  If the count value Nr of the internal print number counter 121, that is, the current print number Nr of the paper has not reached the set blank paper print number N (YES in step 481), the CPU 101 determines the next paper in the memory M11. The area S of the range surrounded by all the edges is summed, and this total value ST is stored in the memory M14 as the total area of the ink adhering portion (step 482).

  Then, the total area SAT in the detection area is read from the memory M17 (step 483). From the total area of the ink adhering portion of the next sheet obtained in step 482 and the total area SAT in the detection area read in step 483, The ink adhesion area ratio α of the next sheet is calculated (α = (ST / SAT) × 100) and stored in the memory M18 (step 484). Then, the ink adhesion prevention performance determination reference area ratio αth is read from the memory M16 (step 485), and the read ink adhesion prevention performance determination reference area ratio αth and the ink adhesion area ratio α of the next paper calculated in step 484 are obtained. Compare (step 486).

  In step 486, if α ≧ αth, the process returns to step 479, and the processing of steps 479 to 486 is repeated. In step 486, if α <αth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 487), and the ink adhesion prevention performance determination sheet number Nth is read from the memory M19 (step 475). Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal printing number counter 121 to which 1 is added in step 487, and if Nr ≦ Nth (YES in step 476), the display unit “No problem with ink adhesion prevention performance” is displayed in 105 (step 477). If Nr> Nth (NO in step 476), “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 478). .

  In this embodiment, since the number Nth of the ink adhesion prevention performance determination is set to 10, if the number Nr of printed sheets for which α <αth in step 486 is within 10 sheets, that is, the printing order of the sheets is 10. If the number is within the range, the display 105 displays “no problem with ink adhesion prevention performance” (see FIG. 32B). On the other hand, when the number Nr of printed sheets for which α <αth is set in step 486 exceeds 10, that is, when the printing order of the sheets is behind the number Nth of ink adhesion prevention performance determination, the display unit 105 displays. Is displayed as “There is a problem with ink adhesion prevention performance” (see FIG. 32C).

  In the fourth embodiment, when the count value Nr of the internal printing sheet counter 121 reaches the blank sheet printing number N without confirming α <αth (NO in step 481), the CPU 101 prevents ink adhesion from the memory M19. The performance judgment number Nth is read out (step 488-1), it is confirmed that Nr <Nth is not satisfied (NO in step 488-2), and “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 478). : Refer to FIG. 32 (d)). If it is confirmed in step 488-2 that Nr <Nth, “not determined” is displayed on the display 105 (step 488-3: see FIG. 32E).

[Embodiment 5: Ink adhesion prevention performance judgment based on ink adhesion area of Nth sheet]
In the first embodiment, the ink adhesion prevention performance is determined by the ink adhesion area of the first sheet (first sheet), but the ink adhesion area of the Nth sheet (last sheet) is determined by the ink adhesion area. You may make it judge adhesion prevention performance.

  FIG. 33 shows a block diagram of the ink adhesion prevention performance judgment device 100E when the ink adhesion prevention performance is judged based on the ink adhesion area of the Nth sheet. In addition to the configuration of the ink adhesion prevention performance judgment device 100A shown in FIG. 3, the ink adhesion prevention performance judgment device 100E is provided with an internal print number counter 121. 34 to 36 show the processing flow of the ink adhesion prevention performance judging device 100E. Note that FIG. 35 is a transcription of the flowchart of FIG. 6, and FIG. 36 is a transcription of the flowchart of FIG. Also, in FIG. 34, the processing from step 301 to 317 is the same as the processing from step 301 to 317 shown in FIG.

  When the CPU 101 of the ink adhesion prevention performance determination device 100E receives the notification of the completion of reception of the print start command from the printing press control device 200 (YES in step 317), the count value Nr = 0 of the internal print number counter 121 is set ( Step 490). Then, the measurement position information P is read from the memory M3 (step 491), the count value Cps of the measurement position counter 111 corresponding to the measurement position is calculated from the read measurement position information P, and written in the memory M4 (step 492). .

  When a cylinder insertion completion signal is received from the printing press controller 200 (YES in step 493), the count value Cps of the measurement position counter 111 corresponding to the measurement position is read from the memory M4 (step 494), and the measurement position counter 111 is read. If the current count value Cpr is equal to the count value Cps corresponding to the measurement position (YES in step 496), 1 is added to the count value Nr of the internal printed sheet counter 121 (step 497). Then, the number N of blank printed pages is read from the memory M2 (step 498), and the read number N of blank printed pages is compared with the count value Nr of the internal printed number counter 121 (step 499).

  Then, the processes of steps 495 to 499 are repeated until the count value Nr of the internal print sheet counter 121, that is, the current sheet print number Nr reaches the blank sheet print number N. When the current number Nr of printed sheets reaches the number N of blank printed sheets (YES in step 499), a measurement command signal is output to the measuring instrument 112 (step 500). As a result, the camera 21 with the camera number set via the unit number setting unit 107 is operated, and a part of the surface pressed against the impression cylinder plate 8 of the Nth sheet (last sheet) being conveyed. Is divided into n in the transport direction and m in the left-right direction orthogonal to the transport direction. The CPU 101 takes in the image data Z1-1 to Zn-m captured by the camera 21 via the A / D converter 113 and stores it in the memory M6 (step 501).

  In the fifth embodiment, the sheet to be inspected is the last sheet with the number N of blank pages printed. However, a setting device for determining the order of the sheets to be inspected is provided, and the setting device is set according to the number N of blank sheets to be printed. It goes without saying that the same effect can be obtained even if a small number is used and extra blank paper is supplied.

[Embodiment 6: Ink adhesion prevention performance judgment based on ink adhesion area ratio of Nth sheet]
In the fifth embodiment, the ink adhesion prevention performance is determined by the ink adhesion area of the Nth sheet, but the ink adhesion prevention performance is determined by the ink adhesion area ratio of the Nth sheet. You may do it.

  FIG. 37 shows a block diagram of the ink adhesion preventing performance judging device 100F when the ink adhesion preventing performance is judged based on the ink adhesion area ratio of the Nth sheet. In addition to the configuration of the ink adhesion prevention performance judgment device 100B shown in FIG. 11, the ink adhesion prevention performance judgment device 100F is provided with an internal print number counter 121. 38 to 40 show the processing flow of the ink adhesion prevention performance judging device 100F. Note that FIG. 38 is a reprint of the flowchart of FIG. 34, FIG. 39 is a reprint of the flow chart of FIG. 13, and FIG. 40 is a reprint of the flow chart of FIG.

  In the sixth embodiment, the sheet to be inspected is the last sheet of the number N of blank pages to be printed. However, a setting device for determining the order of the sheets to be inspected is provided separately. It goes without saying that the same effect can be obtained even if a small number is used and extra blank paper is supplied.

[Embodiment 7: Ink adhesion prevention performance judgment based on non-adhesion area of ink]
In the first embodiment described above, the deterioration of the ink adhesion prevention performance is determined based on the ink adhesion area, but the deterioration of the ink adhesion prevention performance may be determined based on the non-ink adhesion area. FIG. 41 shows a block diagram of an ink adhesion prevention performance judging device 100G that judges the deterioration of the ink adhesion prevention performance based on the non-attachment area of the ink.

  This ink adhesion prevention performance judgment device 100G has the same configuration as the ink adhesion prevention performance judgment device 100A shown in FIG. 3, but the memory M14 has an “area within the range surrounded by all edges in the edge memory. Instead of “total”, “total of areas of“ 1 ”level pixels in the binarized image data memory” is stored. 42 to 44 show the processing flow of the ink adhesion prevention performance judging device 100G.

  In the seventh embodiment, the CPU 101 checks the pixel value of the image data Z at steps 328 ′ and 332 ′, and if the pixel value is equal to or lower than the threshold level th1, the address of the corresponding pixel in the memory M8 is “1”. Is written (steps 329 and 333), and if it exceeds the threshold level th1, "0" is written to the address of the corresponding pixel in the memory M8 (steps 330 and 334). As a result, binary image data Z ′ (Z1-1 ′ to Zn−) in which a pixel having a pixel value equal to or lower than the threshold level th1, that is, a pixel determined to have no ink attached to the memory M8 is set to “1”. m ′) is saved.

  Next, the CPU 101 performs edge extraction by Sobel differentiation on the binary image data Z ′ (Z1-1 ′ to Zn-m ′) stored in the memory M8 (steps 336 to 346). As a result, the outer edge of each block of “1” level pixels is extracted from the binary image data Z ′ (Z1-1 ′ to Zn-m ′) as an edge, and this edge is stored in the memory M11.

  Then, the CPU 101 calculates the area S of the range surrounded by the first edge in the memory M11, and stores this area S in the memory M13 (step 347). Then, the ink adhesion portion determination area Sth is read from the memory M12 (step 348), and the read ink adhesion portion determination area Sth is compared with the area S obtained in step 347 (step 349). Here, if S <Sth, it is determined that the area S is a small area, and the data in the memory M8 in the range corresponding to the range surrounded by the first edge is changed from “0” to “1”. Rewrite (step 350 '). As a result, “1” level data is stored in the memory M8 as an area in the range corresponding to the range surrounded by the first edge determined to be a small area (the area of the ink adhesion portion determined to be a small area). It is added as the area of the attached part.

  For the range surrounded by the next edge stored in the memory M11, the CPU 101 calculates the area S of the range surrounded by the edge in the same manner as the range surrounded by the first edge (step 351). ), Compared with the ink adhering portion determination area Sth (step 353), if S <Sth, it is determined that the area S is a small area, and a range of memory corresponding to the range surrounded by the next edge is determined. The data in M8 is rewritten from “0” to “1” (step 354 ′). Thereafter, in step 355, the processing of steps 351 to 355 is repeated for the range surrounded by all edges in the memory M11 until the calculation of the area S of the range surrounded by the edges is confirmed.

  Next, the CPU 101 sums up the areas of the “1” level pixels in the memory M8, and stores the total value ST in the memory M14 as the total area of the non-ink-attached portion (step 356 ′). Then, the ink adhesion prevention performance judgment reference area STth is read from the memory M15 (step 357), and the read ink adhesion prevention performance judgment reference area STth is compared with the total area ST of the non-ink adhesion portion obtained at step 356 ′. (Step 358 '). Here, if ST> STth, “no ink adhesion prevention performance problem” is displayed on the display unit 105 (step 359), and if ST ≦ STth, “indication of ink adhesion prevention performance problem” is displayed on the display unit 105. Display (step 360).

[Embodiment 8: Ink adhesion prevention performance judgment based on ink non-adhesion area ratio]
In the seventh embodiment, the ink adhesion prevention performance is determined based on the ink non-adhesion area. However, the ink adhesion prevention performance may be determined based on the ink non-adhesion area ratio. FIG. 45 shows a block diagram of the ink adhesion preventing performance judging device 100H when the ink adhesion preventing performance is judged by the ink non-attaching area ratio.

  The ink adhesion prevention performance judgment device 100H has the same configuration as the ink adhesion prevention performance judgment device 100B shown in FIG. 11, but the memory M14 has an “area within the range surrounded by all edges in the edge memory. Instead of “total”, “total of areas of“ 1 ”level pixels in the binarized image data memory” is stored. In addition, the area ratio α of the non-ink-attached portion is written in the memory M18 instead of the area ratio of the ink-attached portion. 46 to 48 show the processing flow of the ink adhesion prevention performance judging device 100H.

  In the eighth embodiment, the CPU 101 calculates the area ratio of the non-ink-attached portion of the sheet from the total area ST of the non-ink-attached portion obtained in step 356 ′ and the total area SAT in the detection area read in step 361. The ink non-adhesion area ratio α is calculated (α = (ST / SAT) × 100) and stored in the memory M18 (step 362). Then, the ink adhesion prevention performance determination reference area ratio αth is read from the memory M16 (step 363), and the read ink adhesion prevention performance determination reference area ratio αth is compared with the ink non-adhesion area ratio α calculated in step 362 (step 363). Step 364 '). Here, if α> αth, “no ink adhesion prevention performance problem” is displayed on the display unit 105 (step 365), and if α ≦ αth, “indication of ink adhesion prevention performance problem” is displayed on the display unit 105. It is displayed (step 366).

[Embodiment 9: Ink adhesion prevention performance judgment based on the number of ink adhesion prevention performance judgment sheets and the non-adhesion area of ink]
FIG. 49 shows a block diagram of the ink adhesion prevention performance judging device 100I when the ink adhesion prevention performance judgment is made based on the number of ink adhesion prevention performance judgment sheets and the non-adhesion area of the ink.
This ink adhesion prevention performance judgment device 100I has the same configuration as the ink adhesion prevention performance judgment device 100C shown in FIG. 15, but the memory M14 has an “area within the range surrounded by all edges in the edge memory. Instead of “total”, “total of areas of“ 1 ”level pixels in the binarized image data memory” is stored. 50 to 56 show the processing flow of the ink adhesion prevention performance judging device 100I.

  In the ninth embodiment, the CPU 101 totals the areas of the “1” level pixels of the first sheet in the memory M8, and uses this total value ST as the total area of the non-ink-attached portion of the first sheet. Is stored in the memory M14 (step 454 '). Then, the ink adhesion prevention performance judgment reference area STth is read from the memory M15 (step 455), and the read ink adhesion prevention performance judgment reference area STth and the sum of the non-ink adhesion portions of the first sheet obtained in step 454 ′ are obtained. The area ST is compared (step 456 ′).

  In step 456 ', if ST> STth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 457), and the ink adhesion prevention performance determination sheet number Nth is read from the memory M19 (step 458). Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal print number counter 121 to which 1 is added in step 457. If Nr ≦ Nth (YES in step 459), the display “No problem with ink adhesion prevention performance” is displayed at 105 (step 460). If Nr> Nth (NO at step 459), “There is a problem with ink adhesion prevention performance” is displayed at the display 105 (step 461). .

  In step 456 ′, if ST ≦ STth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 462), and the blank sheet print number N is read from the memory M2 (step 463). The number N of sheets and the count value Nr of the internal printed sheet counter 121 are compared (step 464).

  If the count value Nr of the internal printing sheet counter 121, that is, if the current sheet printing number Nr has not reached the blank sheet printing number N (YES in step 464), the CPU 101 sets the “1” level of the next sheet in the memory M8. The total area ST is stored in the memory M14 as the total area of the non-ink-attached portion of the next sheet (step 465 '). Then, the ink adhesion prevention performance judgment reference area STth is read from the memory M15 (step 466), and the read ink adhesion prevention performance judgment reference area STth is compared with the total area ST of the non-ink adhesion portion obtained at step 465 ′. (Step 467 ′).

  In step 467 ', if ST≤STth, the process returns to step 462, and the processes in steps 462 to 467' are repeated. In step 467 ', if ST> STth, 1 is added to the count value Nr of the internal print sheet counter 121 (step 468), and the ink adhesion prevention performance determination sheet number Nth is read from the memory M19 (step 458).

  Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal printing number counter 121 to which 1 is added in step 468. If Nr ≦ Nth (YES in step 459), the display unit is displayed. “No problem with ink adhesion prevention performance” is displayed at 105 (step 460). If Nr> Nth (NO at step 459), “There is a problem with ink adhesion prevention performance” is displayed at the display 105 (step 461). .

  In the ninth embodiment, when the count value Nr of the internal printing sheet counter 121 reaches the blank sheet printing number N without confirming ST> STth (NO in step 464), the CPU 101 prevents ink adhesion from the memory M19. The performance judgment number Nth is read (step 469-1), it is confirmed that Nr <Nth is not satisfied (NO in step 469-2), and “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 461). ). If it is confirmed in step 469-2 that Nr <Nth, “not determined” is displayed on the display 105 (step 469-3).

[Embodiment 10: Ink adhesion prevention performance judgment based on the number of ink adhesion prevention performance judgment sheets and the non-adhesion area ratio of ink]
In the ninth embodiment, the ink adhesion prevention performance is judged based on the number of ink adhesion prevention performance judgments and the ink non-adhesion area, but the ink adhesion prevention performance is judged based on the ink adhesion prevention performance judgment number and the ink non-adhesion area ratio. You may make it judge. FIG. 57 shows a block diagram of the ink adhesion prevention performance judging device 100J when the ink adhesion prevention performance is judged based on the number of ink adhesion prevention performance judgment sheets and the non-adhesion area ratio of ink.

  The ink adhesion prevention performance judgment device 100J has the same configuration as the ink adhesion prevention performance judgment device 100D shown in FIG. 24. However, the memory M14 has an “area within a range surrounded by all edges in the edge memory”. Instead of “total”, “total of areas of“ 1 ”level pixels in the binarized image data memory” is stored. In addition, the area ratio α of the non-ink-attached portion is written in the memory M18 instead of the area ratio of the ink-attached portion. 58 to 64 show the processing flow of the ink adhesion prevention performance judging device 100J.

  In the tenth embodiment, the CPU 101 totals the areas of the “1” level pixels of the first sheet in the memory M8, and uses this total value ST as the total area of the non-ink-attached portion of the first sheet. Is stored in the memory M14 (step 454 '). Then, the total area SAT in the detection area is read from the memory M17 (step 470).

  Next, the CPU 101 determines whether the ink on the first sheet is non-determined from the total area ST of the non-ink-attached portion of the first sheet obtained in step 454 ′ and the total area SAT in the detection area read in step 470. The adhesion area ratio α is calculated (α = (ST / SAT) × 100) and stored in the memory M18 (step 471). Then, the ink adhesion prevention performance judgment reference area ratio αth is read from the memory M16 (step 472), and the read ink adhesion prevention performance judgment reference area ratio αth and the ink non-adhesion area ratio of the first sheet calculated in step 471 are read. α is compared (step 473 ′).

  If α> αth in step 473 ', 1 is added to the count value Nr of the internal printing sheet counter 121 (step 474), and the ink adhesion prevention performance determination sheet number Nth is read from the memory M19 (step 475). Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal printing number counter 121 to which 1 is added in step 474, and if Nr ≦ Nth (YES in step 476), the display unit “No problem with ink adhesion prevention performance” is displayed in 105 (step 477). If Nr> Nth (NO in step 476), “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 478). .

  If α ≦ αth in step 473 ′, 1 is added to the count value Nr of the internal print number counter 121 (step 479), and the number N of blank pages printed is read out from the memory M2 (step 480). The number N of sheets and the count value Nr of the internal printed sheet counter 121 are compared (step 481).

  If the count value Nr of the internal print number counter 121, that is, the current print number Nr of paper has not reached the set blank print number N (YES in step 481), the CPU 101 determines the next paper in the memory M8. The areas of the “1” level pixels are summed, and the total value ST is stored in the memory M14 as the total area of the non-ink-attached portion of the next sheet (step 482 ′).

  Then, the total area SAT in the detection area is read from the memory M17 (step 483), the total area of the non-ink-attached portion of the next sheet obtained in step 482 ′, and the total area SAT in the detection area read in step 483 Then, the ink non-adhesion area ratio α of the next sheet is calculated (α = (ST / SAT) × 100) and stored in the memory M18 (step 484). Then, the ink adhesion prevention performance judgment reference area ratio αth is read from the memory M16 (step 485), and the read ink adhesion prevention performance judgment reference area ratio αth and the ink non-adhesion area ratio α of the next paper calculated in step 484 are obtained. Are compared (step 486 ').

  In step 486 ′, if α ≦ αth, the process returns to step 479 to repeat the processing in steps 479 to 486 ′. In step 486 ', if α> αth, 1 is added to the count value Nr of the internal print number counter 121 (step 487), and the ink adhesion prevention performance determination number Nth is read from the memory M19 (step 475). Then, the read ink adhesion prevention performance determination number Nth is compared with the count value Nr of the internal printing number counter 121 to which 1 is added in step 487, and if Nr ≦ Nth (YES in step 476), the display unit “No problem with ink adhesion prevention performance” is displayed in 105 (step 477). If Nr> Nth (NO in step 476), “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 478). .

  In the tenth embodiment, when the count value Nr of the internal printing sheet counter 121 reaches the blank sheet printing number N without confirming α> αth (NO in step 481), the CPU 101 prevents ink adhesion from the memory M19. The performance judgment number Nth is read out (step 488-1), it is confirmed that Nr <Nth is not satisfied (NO in step 488-2), and “There is a problem with ink adhesion prevention performance” is displayed on the display 105 (step 478). ). If it is confirmed in step 488-2 that Nr <Nth, “not determined” is displayed on the display 105 (step 488-3).

[Embodiment 11: Judgment of ink adhesion prevention performance based on non-adhesion area of ink on Nth sheet]
In the seventh embodiment, the ink adhesion prevention performance is determined based on the ink non-adhesion area of the first sheet (first sheet), but the ink non-adhesion area of the Nth sheet (last sheet). In this case, the ink adhesion prevention performance may be determined.

  FIG. 65 shows a block diagram of the ink adhesion preventing performance judging device 100K when the ink adhesion preventing performance is judged based on the ink non-adhering area of the Nth sheet. This ink adhesion prevention performance judgment device 100K has the same configuration as the ink adhesion prevention performance judgment device 100E shown in FIG. 33, but the memory M14 has an “area within the range surrounded by all edges in the edge memory. Instead of “total”, “total of areas of“ 1 ”level pixels in the binarized image data memory” is stored. 66 to 68 show the processing flow of the ink adhesion prevention performance judging device 100K.

[Embodiment 12: Judgment of ink adhesion prevention performance based on non-adhesion area ratio of ink on Nth sheet]
In the eleventh embodiment, the ink adhesion prevention performance is determined based on the ink non-adhesion area of the Nth sheet, but the ink adhesion prevention performance is determined based on the ink non-adhesion area ratio of the Nth sheet. May be performed.

  FIG. 69 shows a block diagram of the ink adhesion preventing performance judging device 100L when judging the ink adhesion preventing performance based on the non-attached area ratio of the Nth sheet of ink. The ink adhesion prevention performance judgment device 100L has the same configuration as the ink adhesion prevention performance judgment device 100F shown in FIG. 37, but the memory M14 has an “area within the range surrounded by all edges in the edge memory. Instead of “total”, “total of areas of“ 1 ”level pixels in the binarized image data memory” is stored. In addition, the area ratio α of the non-ink-attached portion is written in the memory M18 instead of the area ratio of the ink-attached portion. 70 to 72 show the processing flow of the ink adhesion prevention performance judging device 100L.

  In the first to twelfth embodiments described above, the impression cylinder plate attached to the impression cylinder has been described as an example of the ink adhesion preventing member, but the plate attached to the transfer cylinder, the discharge cylinder, the reversing cylinder, and the like is also described. Similarly, the ink adhesion prevention performance can be determined. In the configuration shown in FIG. 73, an ink adhesion preventing member (plate) 24 is attached to the transfer cylinder 4. In this case, the paper transported along the peripheral surface of the transfer drum 25 is pressed against the surface of the plate 24 by a dedicated pressing roller 25.

In the first to twelfth embodiments described above, imaging of the surface pressed against the impression cylinder plate 8 is performed online (imaging during conveyance), but may be performed offline. For example, when performing offline, after the paper pressed against the impression cylinder plate 8 is discharged, the operator carries the paper to the measuring instrument 112 and images it there.
Further, in order to improve the evaluation accuracy, it is conceivable to make the same printed pattern at the time of evaluation, make the ink adhesion state evaluation portion the same, evaluate the solid printing portion, and match the printing density.

It is a schematic block diagram which shows a four-color exclusive duplex printing machine as an example of the printing machine used for implementation of the ink adhesion prevention performance judgment method of this invention. It is a schematic block diagram which shows the sheet-fed rotary printing machine with a reversing mechanism as another example of the printing machine used for implementation of the ink adhesion prevention performance judgment method of this invention. It is a block diagram which shows one Embodiment (Embodiment 1) of the ink adhesion prevention performance judgment apparatus which concerns on this invention. It is a block diagram which shows the printing press control apparatus which transfers this ink adhesion prevention performance judgment apparatus and signals. 4 is a flowchart for explaining processing performed by the ink adhesion prevention performance determination device according to the first embodiment. It is a flowchart following FIG. It is a flowchart following FIG. 5 is a flowchart for explaining processing performed by the printing press control apparatus shown in FIG. 4. It is a flowchart following FIG. It is a figure explaining the process in which an ink adhesion area is calculated | required from the imaged image data. It is a block diagram which shows other embodiment (Embodiment 2) of the ink adhesion prevention performance judgment apparatus. 10 is a flowchart for explaining processing performed by the ink adhesion prevention performance judging device according to the second embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 3) of the ink adhesion prevention performance judgment apparatus. 10 is a flowchart for explaining processing performed by the ink adhesion prevention performance determination device according to the third embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. FIG. 10 is a diagram illustrating a process for determining ink adhesion prevention performance in the third embodiment. It is a block diagram which shows other embodiment (Embodiment 4) of the ink adhesion prevention performance judgment apparatus. 10 is a flowchart for explaining processing performed by the ink adhesion prevention performance judging device according to the fourth embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. FIG. 10 is a diagram illustrating a process for determining ink adhesion prevention performance in a fourth embodiment. It is a block diagram which shows other embodiment (Embodiment 5) of the ink adhesion prevention performance judgment apparatus. 10 is a flowchart for explaining processing performed by the ink adhesion prevention performance judging device according to the fifth embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 6) of the ink adhesion prevention performance judgment apparatus. 14 is a flowchart for explaining processing performed by an ink adhesion prevention performance determination device according to a sixth embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 7) of the ink adhesion prevention performance judgment apparatus. 18 is a flowchart for explaining processing performed by the ink adhesion prevention performance determination device according to the seventh embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 8) of the ink adhesion prevention performance judgment apparatus. 18 is a flowchart for explaining processing performed by an ink adhesion prevention performance determination device according to an eighth embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 9) of the ink adhesion prevention performance judgment apparatus. 18 is a flowchart for explaining processing performed by the ink adhesion prevention performance determination device according to the ninth embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 10) of the ink adhesion prevention performance judgment apparatus. 22 is a flowchart for explaining processing performed by the ink adhesion prevention performance determination device of the tenth embodiment. It is a flowchart following FIG. 60 is a flowchart following on from FIG. 59. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 11) of the ink adhesion prevention performance judgment apparatus. 22 is a flowchart for illustrating processing performed by the ink adhesion prevention performance determination device according to the eleventh embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a block diagram which shows other embodiment (Embodiment 12) of the ink adhesion prevention performance judgment apparatus. 22 is a flowchart for illustrating processing performed by the ink adhesion prevention performance determination device according to the twelfth embodiment. It is a flowchart following FIG. It is a flowchart following FIG. It is a figure which shows the example which attached the ink adhesion prevention member (plate) to the transfer cylinder. It is a figure which shows schematic structure of the printing mechanism in an offset rotary printing press. It is a figure explaining the ink image which transfers to an impression cylinder, when printing with a duplex printing machine. It is a figure explaining the ink image which transfers to an impression cylinder when performing double-sided printing with a reversing machine. It is a figure explaining the ink image which transfers to an impression cylinder in the case of single-sided printing. It is a figure which shows the example which mounted | wore the impression cylinder with the ink adhesion prevention member (impression plate).

Explanation of symbols

1 (1-1 to 1-8): plate cylinder, 2 (2-1 to 2-8): rubber cylinder, 3 (3-1 to 3-8): impression cylinder, 4 ... transfer cylinder, 5 ... ink , 6 ... paper, 7, 7 '... ink image, 8 ... impression cylinder plate, 21 (21-1 to 21-8) ... camera, 22 ... reversing cylinder, 100 (100A to 100L) ... ink adhesion prevention performance judgment Device: 101 ... CPU, 102 ... ROM, 103 ... RAM, 104 ... Input device, 105 ... Display device, 106 ... Output device, 107 ... Unit number setting device, 108 ... Print number setting device, 109 ... Measurement position setting device, DESCRIPTION OF SYMBOLS 110 ... Rotary encoder, 111 ... Measuring position counter, 112 ... Measuring device, 113 ... A / D converter, 114-120 ... Input / output interface (I / O, I / F), M1-M20 ... Memory, 200 ... Printing machine control device 201 ... CPU 202 ... R OM, 203... RAM, 204... Detector for sheet feeding number, 205 .. counter for sheet feeding number, 206... Motor for printing press, 207... Driver for driving motor, 208. Encoder 210 ... Rotation phase detection counter 211 ... Paper feeding device 213 ... Cylinder attachment / detachment device 215 ... Internal clock counter 216-221 ... Input / output interface (I / O, I / F), M31-M35 ... Memory .

Claims (36)

In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of pressing the conveyed paper against the surface of the ink adhesion preventing member;
Imaging the surface of the paper pressed against the ink adhesion preventing member;
Obtaining an adhesion area of ink attached to the paper from the image data of the imaged paper;
And determining the ink adhesion prevention performance of the ink adhesion prevention member from the obtained ink adhesion area of the paper. In the ink adhesion prevention performance judgment method according to claim 1,
The step of judging the ink adhesion preventing performance of the ink adhesion preventing member is as follows:
The obtained ink adhesion area is compared with a predetermined allowable area, and when the ink adhesion area is larger than the allowable area, the ink adhesion preventing performance of the ink adhesion preventing member is deteriorated. A method for judging ink adhesion prevention performance, comprising the step of judging. In the ink adhesion prevention performance judgment method according to claim 1,
The step of judging the ink adhesion preventing performance of the ink adhesion preventing member is as follows:
A step of obtaining an adhesion area ratio of the ink adhering to the paper from the obtained ink adhesion area;
The obtained ink adhesion area ratio is compared with a predetermined allowable area ratio, and when the ink adhesion area ratio is larger than the allowable area ratio, the ink adhesion prevention performance of the ink adhesion prevention member And a step of judging that the ink has deteriorated. In the ink adhesion prevention performance judgment method according to claim 1,
The step of determining the adhesion area of the ink on the paper,
Binarizing the image data of the imaged paper;
And a step of obtaining an adhesion area of ink adhering to the paper from the binarized image data. In the ink adhesion prevention performance judgment method according to claim 1,
The step of determining the adhesion area of the ink on the paper,
Binarizing the image data of the imaged paper;
A step of obtaining an area of a range in which ink is continuously adhered from the binarized image data;
Comparing the area of the obtained range where the ink has been continuously adhered to a predetermined threshold, and extracting only those areas where the area of the area where the ink has continuously adhered is larger than the threshold, And a step of determining the total of the extracted areas as the adhesion area of the ink. In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Obtaining an adhesion area of ink attached to the paper from the image data of the imaged paper;
The obtained ink adhesion area of the paper was compared with a predetermined allowable area, and the ink adhesion area was pressed against the ink adhesion preventing member of the first paper that was smaller than the allowable area. A process for obtaining a ranking;
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. An ink adhesion preventing performance judging method comprising: a step of: In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Obtaining an adhesion area of ink attached to the paper from the image data of the imaged paper;
A step of obtaining an adhesion area ratio of the ink adhering to the paper from the obtained ink adhesion area;
The ink adhesion prevention rate of the first paper in which the ink adhesion area rate is smaller than the allowable area rate by comparing the obtained ink adhesion area rate of the paper with a predetermined allowable area rate. A process for obtaining a ranking pressed against
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. An ink adhesion preventing performance judging method comprising: a step of: In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order; and
Obtaining an adhesion area of ink attached to the paper from the image data of the imaged paper;
The ink adhesion area of the obtained paper is compared with a predetermined allowable area, and when the ink adhesion area is larger than the allowable area, the ink adhesion prevention performance of the ink adhesion prevention member is deteriorated. A method for judging the ink adhesion prevention performance. In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order; and
Obtaining an adhesion area of ink attached to the paper from the image data of the imaged paper;
A step of obtaining an adhesion area ratio of the ink adhering to the paper from the obtained ink adhesion area;
The obtained ink adhesion area ratio is compared with a predetermined allowable area ratio, and when the ink adhesion area ratio is larger than the allowable area ratio, the ink adhesion prevention performance of the ink adhesion prevention member And a method for judging that the ink has deteriorated. In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of pressing the conveyed paper against the surface of the ink adhesion preventing member;
Imaging the surface of the paper pressed against the ink adhesion preventing member;
Determining the non-adhesion area of the ink that is not attached to the paper from the image data of the imaged paper;
And a step of judging the ink adhesion preventing performance of the ink adhesion preventing member from the determined ink non-adhering area of the paper. In the ink adhesion prevention performance judgment method according to claim 10,
The step of judging the ink adhesion preventing performance of the ink adhesion preventing member is as follows:
When the non-adhesion area of the obtained ink is compared with a predetermined allowable area, and the non-adhesion area of the ink is smaller than the allowable area, the ink adhesion prevention performance of the ink adhesion prevention member is deteriorated. A method for judging the performance of preventing ink adhesion. In the ink adhesion prevention performance judgment method according to claim 10,
The step of judging the ink adhesion preventing performance of the ink adhesion preventing member is as follows:
A step of determining a non-adhesion area ratio of the ink not adhering to the paper from the determined non-adhesion area of the ink;
The non-adhesion area ratio of the obtained ink is compared with a predetermined allowable area ratio, and when the non-adhesion area ratio of the ink is smaller than the allowable area ratio, the ink adhesion of the ink adhesion prevention member And a step of judging that the prevention performance has deteriorated. In the ink adhesion prevention performance judgment method according to claim 10,
The step of determining the non-adhesion area of the ink on the paper is as follows:
Binarizing the image data of the imaged paper;
And a step of determining a non-adhesion area of the ink on which the ink is not adhered to the paper from the binarized image data. In the ink adhesion prevention performance judgment method according to claim 10,
The step of determining the non-adhesion area of the ink on the paper is as follows:
Binarizing the image data of the imaged paper;
A step of obtaining an area of a range in which ink is continuously adhered from the binarized image data;
The area of the range where the ink is continuously adhered is compared with a predetermined threshold value, and the area where the area of the continuous ink is adhered is smaller than the threshold value. And adding the area corresponding to the small area to the non-adhered area of the ink indicating the total area of the pixels indicating the non-ink-adhered part of the binarized image data. Ink adhesion prevention performance judgment method. In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Determining the non-adhesion area of the ink that is not attached to the paper from the image data of the imaged paper;
The determined ink non-adhesion area of the paper is compared with a predetermined allowable area, and the ink non-adhesion area is pressed against the ink adhesion preventing member of the first paper in which the ink non-adhesion area is larger than the allowable area. A process for obtaining a ranking,
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. An ink adhesion preventing performance judging method comprising: a step of: In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Determining the non-adhesion area of the ink that is not attached to the paper from the image data of the imaged paper;
A step of determining a non-adhesion area ratio of the ink not adhering to the paper from the determined non-adhesion area of the ink;
The ink non-adhesion area ratio of the obtained paper is compared with a predetermined allowable area ratio, and the ink adhesion prevention of the first paper in which the ink adhesion area ratio is larger than the allowable area ratio. A step of determining the order of pressing against the member;
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. An ink adhesion preventing performance judging method comprising: a step of: In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order; and
Determining the non-adhesion area of the ink that is not attached to the paper from the image data of the imaged paper;
The ink non-adhesion area of the obtained paper is compared with a predetermined allowable area, and when the non-adhesion area of the ink is smaller than the allowable area, the ink adhesion prevention performance of the ink adhesion prevention member And a method for judging that the ink has deteriorated. In the ink adhesion prevention performance judgment method for judging the ink adhesion prevention performance of the ink adhesion prevention member having a surface that prevents the adhesion of ink,
A step of rotating the rotating body mounted on the peripheral surface of the ink adhesion preventing member;
A step of sequentially pressing a plurality of sheets of paper to be conveyed against the surface of the ink adhesion preventing member;
Imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order; and
Determining the non-adhesion area of the ink that is not attached to the paper from the image data of the imaged paper;
A step of determining a non-adhesion area ratio of the ink not adhering to the paper from the determined non-adhesion area of the ink;
The non-adhesion area ratio of the obtained ink is compared with a predetermined allowable area ratio, and when the non-adhesion area ratio of the ink is smaller than the allowable area ratio, the ink adhesion of the ink adhesion prevention member A method for judging the ink adhesion prevention performance, comprising the step of judging that the prevention performance has deteriorated. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for pressing the conveyed paper against the surface of the ink adhesion preventing member;
Means for imaging the surface of the paper pressed against the ink adhesion preventing member;
Means for determining the adhesion area of the ink adhering to the paper from the image data of the imaged paper;
An ink adhesion preventing performance judging device comprising: means for judging the ink adhesion preventing performance of the ink adhesion preventing member from the obtained ink adhesion area of the paper. In the ink adhesion prevention performance judging device according to claim 19,
Means for judging the ink adhesion prevention performance of the ink adhesion prevention member,
The obtained ink adhesion area is compared with a predetermined allowable area, and when the ink adhesion area is larger than the allowable area, the ink adhesion preventing performance of the ink adhesion preventing member is deteriorated. An ink adhesion preventing performance judging device comprising means for judging. In the ink adhesion prevention performance judging device according to claim 19,
Means for judging the ink adhesion prevention performance of the ink adhesion prevention member,
Means for obtaining the adhesion area ratio of the ink adhering to the paper from the obtained ink adhesion area;
The obtained ink adhesion area ratio is compared with a predetermined allowable area ratio, and when the ink adhesion area ratio is larger than the allowable area ratio, the ink adhesion prevention performance of the ink adhesion prevention member And a means for judging that the ink has deteriorated. In the ink adhesion prevention performance judging device according to claim 19,
Means for determining the ink adhesion area of the paper,
Means for binarizing the image data of the imaged paper;
Means for determining an adhesion area of ink adhering to the paper from the binarized image data. In the ink adhesion prevention performance judging device according to claim 19,
Means for determining the ink adhesion area of the paper,
Means for binarizing the image data of the imaged paper;
Means for determining the area of the area where the ink is continuously adhered from the binarized image data;
Comparing the area of the obtained range where the ink has been continuously adhered to a predetermined threshold, and extracting only those areas where the area of the area where the ink has continuously adhered is larger than the threshold, And a means for determining the ink adhesion prevention performance. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Means for determining the adhesion area of the ink adhering to the paper from the image data of the imaged paper;
The obtained ink adhesion area of the paper was compared with a predetermined allowable area, and the ink adhesion area was pressed against the ink adhesion preventing member of the first paper that was smaller than the allowable area. A means of determining the ranking;
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. And an ink adhesion preventing performance judging device. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Means for determining the adhesion area of the ink adhering to the paper from the image data of the imaged paper;
Means for obtaining the adhesion area ratio of the ink adhering to the paper from the obtained ink adhesion area;
The ink adhesion prevention rate of the first paper in which the ink adhesion area rate is smaller than the allowable area rate by comparing the obtained ink adhesion area rate of the paper with a predetermined allowable area rate. A means for obtaining the ranking pressed against
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. And an ink adhesion preventing performance judging device. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order;
Means for determining the adhesion area of the ink adhering to the paper from the image data of the imaged paper;
The ink adhesion area of the obtained paper is compared with a predetermined allowable area, and when the ink adhesion area is larger than the allowable area, the ink adhesion prevention performance of the ink adhesion prevention member is deteriorated. And a means for judging that the ink has been deposited. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order;
Means for determining the adhesion area of the ink adhering to the paper from the image data of the imaged paper;
Means for obtaining the adhesion area ratio of the ink adhering to the paper from the obtained ink adhesion area;
The obtained ink adhesion area ratio is compared with a predetermined allowable area ratio, and when the ink adhesion area ratio is larger than the allowable area ratio, the ink adhesion prevention performance of the ink adhesion prevention member And a means for determining that the ink has deteriorated. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for pressing the conveyed paper against the surface of the ink adhesion preventing member;
Means for imaging the surface of the paper pressed against the ink adhesion preventing member;
Means for determining the non-adhered area of the ink not adhering to the paper from the image data of the imaged paper;
An ink adhesion preventing performance judging device comprising: a means for judging the ink adhesion preventing performance of the ink adhesion preventing member from the determined ink non-adhering area of the paper. In the ink adhesion prevention performance judging device according to claim 28,
Means for judging the ink adhesion prevention performance of the ink adhesion prevention member,
When the non-adhesion area of the obtained ink is compared with a predetermined allowable area, and the non-adhesion area of the ink is smaller than the allowable area, the ink adhesion prevention performance of the ink adhesion prevention member is deteriorated. An ink adhesion preventing performance judging device comprising means for judging that the ink has been removed. In the ink adhesion prevention performance judging device according to claim 28,
Means for judging the ink adhesion prevention performance of the ink adhesion prevention member,
Means for determining the non-adhesion area ratio of the ink not adhering to the paper from the determined non-adhesion area of the ink;
The non-adhesion area ratio of the obtained ink is compared with a predetermined allowable area ratio, and when the non-adhesion area ratio of the ink is smaller than the allowable area ratio, the ink adhesion of the ink adhesion prevention member And a means for determining that the prevention performance has deteriorated. In the ink adhesion prevention performance judging device according to claim 28,
Means for determining the non-adhesion area of the ink of the paper,
Means for binarizing the image data of the imaged paper;
And a means for determining a non-adhesion area of the ink on which the ink is not adhered to the paper from the binarized image data. In the ink adhesion prevention performance judging device according to claim 28,
Means for determining the non-adhesion area of the ink of the paper,
Means for binarizing the image data of the imaged paper;
Means for obtaining an area of a range in which ink is continuously adhered from the binarized image data;
The area of the range where the ink is continuously adhered is compared with a predetermined threshold value, and the area where the area of the continuous ink is adhered is smaller than the threshold value. And means for setting the total area of pixels indicating the non-ink-adhered portion of the binarized image data to which the area corresponding to the small area is added as the non-adhered area of the ink. Ink adhesion prevention performance judgment device. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Means for determining the non-adhered area of the ink not adhering to the paper from the image data of the imaged paper;
The determined ink non-adhesion area of the paper is compared with a predetermined allowable area, and the ink non-adhesion area is pressed against the ink adhesion preventing member of the first paper in which the ink non-adhesion area is larger than the allowable area. A means for obtaining a given ranking;
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. And an ink adhesion preventing performance judging device. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface of the plurality of sheets pressed against the ink adhesion preventing member;
Means for determining the non-adhered area of the ink not adhering to the paper from the image data of the imaged paper;
Means for determining the non-adhesion area ratio of the ink not adhering to the paper from the determined non-adhesion area of the ink;
The ink non-adhesion area ratio of the obtained paper is compared with a predetermined allowable area ratio, and the ink adhesion prevention of the first paper in which the ink adhesion area ratio is larger than the allowable area ratio. Means for determining the order of pressing against the member;
The calculated rank is compared with a predetermined allowable rank, and when the calculated rank is behind the allowable rank, it is determined that the ink adhesion preventing performance of the ink adhesion preventing member has deteriorated. And an ink adhesion preventing performance judging device. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order;
Means for determining the non-adhered area of the ink not adhering to the paper from the image data of the imaged paper;
The ink non-adhesion area of the obtained paper is compared with a predetermined allowable area, and when the non-adhesion area of the ink is smaller than the allowable area, the ink adhesion prevention performance of the ink adhesion prevention member And a means for determining that the ink has deteriorated. In the ink adhesion prevention performance judgment device for judging the ink adhesion prevention performance of the ink adhesion prevention member having the surface that prevents the adhesion of ink,
Means for rotating the rotating body on which the ink adhesion preventing member is mounted;
Means for sequentially pressing a plurality of sheets to be conveyed against the surface of the ink adhesion preventing member;
Means for imaging the surface pressed against the ink adhesion preventing member of the paper pressed in a predetermined order;
Means for determining the non-adhered area of the ink not adhering to the paper from the image data of the imaged paper;
Means for determining the non-adhesion area ratio of the ink not adhering to the paper from the determined non-adhesion area of the ink;
The non-adhesion area ratio of the obtained ink is compared with a predetermined allowable area ratio, and when the non-adhesion area ratio of the ink is smaller than the allowable area ratio, the ink adhesion of the ink adhesion prevention member An ink adhesion prevention performance judging device comprising: means for judging that the prevention performance has deteriorated.

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