JP2008114466A - Color tone management system, printing machine and printing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To contrive to improve workability and reduce a burden on a worker by simplifying a color tone management work in a color tone management system, a printing machine and printing method. <P>SOLUTION: In this color tone management system, a color tone measuring device 22 for measuring the color tone of a test sheet S is provided and an arithmetic unit 12 sets a color adjusting amount from a target color tone set based on PPF data and the color tone of the test sheet S measured with the color tone measuring device 22 and further, by being based on the set color adjusting amount and a correcting color adjusting amount, which is set by an operator through adjustment by visual observation to selected ink key zones with an operating device 23, changes the ink supplies in the ink key zones. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a color tone management system having an ink control device capable of adjusting an ink supply amount for each of a plurality of ink regions partitioned in a print width direction, and a printing machine and a printing method using the color tone management system.

  In a general offset printing machine, printing units for four ink colors, that is, Cyan, Magenta, yellow, and black are arranged along the conveyance path of the printing sheet S. Each printing unit has an ink key type ink supply device. In this ink supply apparatus, the ink supply amount can be adjusted by the gap amount (ink key opening degree) of the ink key with respect to the ink base roller. Therefore, the ink whose supply amount is adjusted by each ink key is supplied to the plate surface of the plate cylinder via the ink roller group, and the ink attached to the plate surface is transferred to the printing sheet S as a pattern via the blanket cylinder.

  The ink supply device of the offset printing machine configured as described above has a plurality of ink keys arranged in the printing width direction for each printing unit, and a plurality of inks partitioned in the width direction of the printing paper. The ink supply amount can be adjusted in units of areas (ink key zones). Therefore, the color adjustment of the printing press is performed by dividing the color adjustment according to the operator's intention into process colors, and then setting the amount of change, which is used for various factors such as the pattern area ratio, the rotation speed of the ink source roller, and the printing response Considering the above, a very advanced skill is required to convert to the ink key opening.

  FIG. 19 is a flowchart of ink supply amount control of an ink control device in a conventional printing press. As shown in FIG. 19, when printing preparation is completed in step S001, trial printing is performed in step S002. In step S003, the operator visually observes the printed matter that has been trial printed, and determines whether color adjustment is necessary. If it is determined that color adjustment is not necessary, the main printing is performed in step S011, whereas if it is determined that color adjustment is necessary, color adjustment work is performed in step S004 and thereafter.

  That is, in step S 004, color separation is performed for each ink key zone that requires color adjustment on the printed matter that has been trial printed by the operator, and indigo (c), red (m), yellow (y), black (k ) Ink increase / decrease amount is set. In step S005, the ink key opening adjustment amount for each ink key zone is set in step S006 in consideration of the line drawing ratio of each ink key zone. In steps S007 to S010, each ink key is operated to adjust the opening of the ink key. Thereafter, the process returns to step S002, and the trial printing is performed again. In step S003, the operator visually checks the printed matter, and determines whether color adjustment is necessary. By repeating this operation, the color of the image is adjusted to obtain a color desired by the operator.

  In addition, as an ink control apparatus of such a conventional printing machine, there exist some which were described in following patent document 1,2.

JP 2000-085107 A JP 2004-034375 A

  However, in an ink supply apparatus having a plurality of ink keys whose ink supply amounts can be adjusted in units of a plurality of ink key zones divided in the width direction of the printing paper for every four printing units, one printing unit, for example, 30 In the case of having four ink keys, there are 120 ink keys in the four printing units, and it is troublesome for the operator to adjust the color by operating these 120 ink keys. In addition, as described above, the operation of the ink key for adjusting the color of the image is very advanced because it is necessary to consider various factors such as the area ratio of the pattern, the rotation speed of the ink base roller, and the printing response. Skill is required, and there is a problem that a large work load is generated on the operator.

  In the ink supply amount setting device described in Patent Document 1 described above, an individual setting switch is provided corresponding to a plurality of ink supply devices, and a set value is input by one individual setting switch in the right alignment mode. Then, the value of the individual setting switch on the right side is also set in conjunction. In this case, although the operation time of the plurality of individual setting switches is shortened, it is necessary to operate all the individual setting switches when performing color adjustment, and the complexity during color adjustment work cannot be eliminated. The operator's workload cannot be eliminated.

  In the printing apparatus described in Patent Document 2, a key operation switch for adjusting the opening degree of each ink key is displayed on a display screen of a touch panel type control panel, and when the changeover switch is operated, Although the pattern of the printed matter that is being printed is displayed at the same time, the operator operates a number of ink keys to adjust the color of the pattern of the printed matter, which is a cumbersome operation.

  The present invention solves the above-described problems, and provides a color management system, a printing machine, and a printing method that can improve workability by simplifying the color management work and reduce the burden on the operator. The purpose is to provide.

  In order to achieve the above object, the color management system of the invention of claim 1 includes a color tone measuring means for measuring the color tone of a test sheet, a color tone based on image information of a printed picture, and a test measured by the color tone measuring means. Color adjustment amount setting means for setting a color adjustment amount by comparing the color tone of the sheet, color adjustment ink area selection means for selecting an ink area for color adjustment from an image corresponding to the printed pattern, and the color adjustment A correction color adjustment amount setting means for setting a correction color adjustment amount for the ink area selected by the ink area selection means; a color adjustment amount set by the color adjustment amount setting means; and a correction color adjustment amount setting means. Ink supply amount changing means for changing the ink supply amount in the ink area based on the corrected color adjustment amount is provided.

  In the color tone management system according to the second aspect of the invention, the color adjustment ink area selection unit selects a plurality of ink areas for color adjustment from an image corresponding to a printed pattern, and the correction color adjustment amount setting unit includes the The correction color adjustment amount of the plurality of ink areas selected by the color adjustment ink area selection means is set based on the instruction value.

  In the color management system of the invention of claim 3, the ink supply amount changing means replaces the color adjustment amount set by the color adjustment amount setting means with the correction color adjustment amount set by the correction color adjustment amount setting means. It is characterized by changing the supply amount.

  The color tone management system according to claim 4 is characterized in that the color tone measuring means measures a color tone based on a color patch row of a test sheet or a printed pattern of the test sheet.

  In the color tone management system according to claim 5, the color tone measuring means measures colorimetric values of a plurality of ink regions in a printed pattern of a test sheet, and obtains colorimetric values of all ink regions by interpolation processing. It is said.

  In the color tone management system according to the sixth aspect of the present invention, there is provided image display means for displaying an image based on image information of a printed pattern, and the color adjustment ink area selection means is configured to display a color from an image displayed by the image display means. The ink region to be adjusted is selected.

  In the color tone management system according to the seventh aspect of the invention, the ink supply amount changing means includes a color adjustment amount of the ink area selected by the ink area selection means for color adjustment, an indication value, a line ratio, and an ink origin. It is characterized in that it is set for each ink area based on the number of rotations of the roller.

  In the color tone management system according to an eighth aspect of the invention, the color tone measuring means measures the color tone of black and the adjustment amount is set based on the measurement result.

  According to a ninth aspect of the present invention, there is provided a color tone management system for measuring a color tone of a color adjustment dedicated pattern printed on a test sheet; a target color value based on image information used for printing the color adjustment dedicated pattern; Corresponds to the color adjustment amount setting means for setting the color adjustment amount by comparing the color tone of the color adjustment dedicated pattern printed on the test sheet measured by the color tone measuring means, and the print pattern printed on the test sheet Color adjustment ink area selection means for selecting an ink area for color adjustment from the image to be corrected; correction color adjustment amount setting means for setting a correction color adjustment amount for the ink area selected by the color adjustment ink area selection means; The ink supply amount in the ink area is changed based on the color adjustment amount set by the color adjustment amount setting means and the correction color adjustment amount set by the correction color adjustment amount setting means. It is characterized in that comprising the supply quantity changing means.

  The printing press of the invention of claim 10 is a reference by comparing a color tone measuring means for measuring the color tone of a test sheet, a color tone based on image information of a printed picture, and a color tone of the test sheet measured by the color tone measuring means. Selected by a reference color adjustment amount setting means for setting a color adjustment amount, a color adjustment ink area selection means for selecting an ink area for color adjustment from an image corresponding to the printed pattern, and the color adjustment ink area selection means. Correction color adjustment amount setting means for setting the correction color adjustment amount of the ink area, the reference color adjustment amount set by the reference color adjustment amount setting means, and the correction color adjustment amount set by the correction color adjustment amount setting means An ink supply amount changing means for changing the ink supply amount in the ink region based on the ink supply amount, and for each ink region based on the ink supply amount changed by the ink supply amount changing means It is characterized in that the Nki supply amount equipped with an adjustable ink supply means.

  The printing method of the invention of claim 11 measures the color tone of the test sheet, compares the color tone based on the image information of the printed pattern and the color tone of the test sheet, sets the reference color adjustment amount, and corresponds to the printed pattern. Select the ink area for color adjustment from the image, set the correction color adjustment amount for the selected ink area, change the ink supply amount in the ink area based on the reference color adjustment amount and the correction color adjustment amount, and change The ink supply amount is adjusted for each ink region based on the ink supply amount.

  According to the color management system of the first aspect of the invention, the color adjustment amount is set by comparing the color tone measuring means for measuring the color tone of the test sheet and the color tone based on the image information of the printed pattern and the color tone of the test sheet. Color adjustment amount setting means, color adjustment ink area selection means for selecting an ink area for color adjustment from an image corresponding to the printed pattern, and correction color adjustment amount setting for setting a correction color adjustment amount for the selected ink area And an ink supply amount changing means for changing the ink supply amount in the ink region based on the color adjustment amount and the correction color adjustment amount.

  Therefore, while setting the color adjustment amount from the color tone based on the image information of the printed pattern and the color tone of the test sheet, select the ink area to be adjusted from the image corresponding to the printed pattern, and correct the selected ink area The color adjustment amount is set, and the ink supply amount is changed based on the color adjustment amount and the correction color adjustment amount. The operator adjusts only the selected predetermined ink area with respect to the color adjustment amount based on the color tone of the test sheet. The correction color adjustment amount can be set according to the indicated value.When the color adjustment amount is specified for the selected ink area, the adjustment amount for each ink component in the ink area is automatically set. Therefore, the ink supply amount for each of the plurality of ink areas partitioned in the print width direction can be adjusted in detail and easily, and the workability can be improved by simplifying the color adjustment work. It is Rukoto, it is possible to reduce the burden on the workers.

  According to the color management system of the invention of claim 2, the color adjustment ink area selection means selects a plurality of ink areas for color adjustment from the image corresponding to the printed pattern, and the correction color adjustment amount setting means Since the correction color adjustment amount of the plurality of ink areas selected by the adjustment ink area selection means is set based on the instruction value, each of the selected ink areas is set based on the same instruction value and image information. A different color adjustment amount is set for each ink region, so that the ink supply amount of the plurality of ink regions can be adjusted easily and in a short time, and workability can be improved.

  According to the color management system of the invention of claim 3, the ink supply amount changing means replaces the color adjustment amount set by the color adjustment amount setting means with the correction color adjustment amount set by the correction color adjustment amount setting means, and supplies ink. Since the amount is changed, it is only necessary to store one type of color adjustment amount for each ink region, so that the apparatus can be simplified and the processing speed can be increased to improve workability.

  According to the color management system of the invention of claim 4, since the color measurement unit measures the color based on the color patch row of the test sheet or the print pattern of the test sheet, the print color of the print pattern can be easily determined by the existing color measurement unit. Color tone can be measured.

  According to the color management system of the invention of claim 5, the color measurement means measures the colorimetric values of a plurality of ink regions in the print pattern of the test sheet, and obtains the colorimetric values of all the ink regions by interpolation processing. Only by measuring a plurality of colorimetric values at a specific location in a printed pattern, the colorimetric values of all the ink regions can be obtained, and the working time can be shortened and the workability can be improved.

  According to the color tone management system of the sixth aspect of the present invention, the image display means for displaying an image based on the image information of the printed pattern is provided, and the color adjustment ink area selecting means is provided based on the image displayed by the image display means. Since the ink area for color adjustment is selected, the operator can easily select the ink area for color adjustment while viewing the image displayed on the image display means, and the workability can be improved.

  According to the color management system of the seventh aspect of the invention, the ink supply amount changing means determines the color adjustment amount of the selected ink area for each ink area based on the indicated value, the image line ratio, and the rotation speed of the ink source roller. Since it is set as a different one, by setting the color adjustment amount for each ink area based on the indicated value, the image area ratio, and the rotation speed of the ink source roller for the selected ink areas, the image area ratio is set. The ink supply amount of each of the different ink regions can be adjusted easily and in a short time, and workability can be improved.

  According to the color management system of the invention of claim 8, since the color measurement means measures the color of the black color and sets the adjustment amount based on the measurement result, it is possible to control the mixed color halftone portion including the black color. It can be.

  According to the color management system of the ninth aspect of the invention, the color tone measuring means for measuring the color tone of the color adjustment dedicated pattern printed on the test sheet, the target color tone value based on the image information used for printing the color adjustment dedicated pattern, and Color adjustment amount setting means that sets the color adjustment amount by comparing the color tone of the color adjustment dedicated pattern printed on the test sheet, and ink that performs color adjustment from the image corresponding to the printed pattern printed on the test sheet Ink area selection means for selecting an area for selecting an area, correction color adjustment amount setting means for setting a correction color adjustment amount for the selected ink area, and an ink area based on the set color adjustment amount and the correction color adjustment amount And an ink supply amount changing means for changing the ink supply amount.

  Therefore, the color adjustment amount is set by comparing the target color tone value based on the image information used for printing the color adjustment dedicated pattern and the color tone of the color adjustment dedicated pattern printed on the test sheet, while being printed on the test sheet. Select the ink area for color adjustment from the image corresponding to the print pattern to be set, set the correction color adjustment amount for the selected ink area, and change the ink supply amount based on the color adjustment amount and the correction color adjustment amount With respect to the color adjustment amount based on the color tone of the color adjustment dedicated pattern printed on the test sheet, it is possible to set the correction color adjustment amount according to the instruction value of the operator only for the selected predetermined ink region, At this time, if the color adjustment amount is instructed for the selected ink region, the adjustment amount for each ink component in the ink region is automatically set, and a plurality of icons partitioned in the print width direction are set. The ink supply amount for each key area can be adjusted in detail and easily, and the workability can be improved by simplifying the color adjustment work, and the burden on the operator can be reduced. it can.

  According to the printing machine of the tenth aspect of the present invention, the color tone measuring means for measuring the color tone of the test sheet and the color for setting the color adjustment amount by comparing the color tone based on the image information of the printed pattern and the color tone of the test sheet. Adjustment amount setting means, color adjustment ink area selection means for selecting an ink area for color adjustment from an image corresponding to a printed pattern, and correction color adjustment amount setting means for setting a correction color adjustment amount for the selected ink area Ink supply amount changing means for changing the ink supply amount in the ink region based on the color adjustment amount and the correction color adjustment amount, and ink capable of adjusting the ink supply amount for each ink region based on the changed ink supply amount Supply means are provided.

  Therefore, while setting the color adjustment amount from the color tone based on the image information of the printed pattern and the color tone of the test sheet, select the ink area to be adjusted from the image corresponding to the printed pattern, and correct the selected ink area Set the color adjustment amount, change the ink supply amount based on the color adjustment amount and the correction color adjustment amount, and adjust the ink supply amount for each ink area based on this ink supply amount. With respect to the color adjustment amount based on, it is possible to set the correction color adjustment amount corresponding to the operator's instruction value only for the selected predetermined ink region. At this time, the color adjustment amount is instructed for the selected ink region. Then, the adjustment amount for each ink component in the ink region is automatically set, and the ink supply amount for each of the plurality of ink regions partitioned in the printing width direction can be easily and in detail. Can be integer, it is possible to improve the workability by realizing simplification of color adjustment work, it is possible to reduce the burden on the operator.

  According to the printing method of the invention of claim 11, the color tone of the test sheet is measured, the color tone based on the image information of the printed pattern is compared with the color tone of the test sheet, the reference color adjustment amount is set, and the printed pattern is set. Select the ink area for color adjustment from the corresponding image, set the correction color adjustment amount for the selected ink area, change the ink supply amount in the ink area based on the reference color adjustment amount and the correction color adjustment amount, The ink supply amount is adjusted for each ink region based on the changed ink supply amount.

  Therefore, while setting the color adjustment amount from the color tone based on the image information of the printed pattern and the color tone of the test sheet, select the ink area to be adjusted from the image corresponding to the printed pattern, and correct the selected ink area Set the color adjustment amount, change the ink supply amount based on the color adjustment amount and the correction color adjustment amount, and adjust the ink supply amount for each ink area based on this ink supply amount. With respect to the color adjustment amount based on, it is possible to set the correction color adjustment amount corresponding to the operator's instruction value only for the selected predetermined ink region. At this time, the color adjustment amount is instructed for the selected ink region. Then, the adjustment amount for each ink component in the ink region is automatically set, and the ink supply amount for each of the plurality of ink regions partitioned in the printing width direction can be easily and in detail. Can be integer, it is possible to improve the workability by realizing simplification of color adjustment work, it is possible to reduce the burden on the operator.

  Exemplary embodiments of a color tone management system, a printing machine, and a printing method according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

  1 is a schematic configuration diagram of a color tone management system according to a first embodiment of the present invention, FIG. 2 is an external view of a color tone measurement device in the color tone management system according to the first embodiment, and FIG. 3 is a color tone management system according to the first embodiment. FIG. 4 is a schematic diagram showing an operation screen in the ink control device of the color tone management system of the first embodiment, and FIG. 5 is an ink supply amount control for each ink key zone of the ink control device of the first embodiment. FIG. 6 is a graph showing the ink key opening change amount with respect to the image line ratio, and FIG. 7 is a flowchart of the ink supply amount control of the ink control device in the printing press having the color tone management system of the first embodiment. 8 is a schematic configuration diagram of an offset printing machine to which a printing machine having the color tone management system of Example 1 is applied.

  In the offset printing machine to which the color tone management system and the printing machine of Example 1 are applied, as shown in FIG. 8, along the conveyance path of the printing sheet S, as the ink colors, Cyan, Magenta, Printing units 101, 201, 301, and 401 are installed for each of yellow and black, and each of the printing units 101, 201, 301, and 401 has an ink supply device 102, 202, 302, and 402, respectively. Is provided. Each of the ink supply devices 102, 202, 302, and 402 includes an ink fountain device including ink source rollers 103, 203, 303, and 403 and ink blades 104, 204, 304, and 404. Ink keys 105, 205, 305, and 405 that can adjust the gap amount (ink key opening degree) between the ink blades 103, 203, 303, and 403 and the ink blades 104, 204, 304, and 404 are provided. In the case of the present embodiment, a plurality of ink keys 105, 205, 305, 405 are provided in the print width direction, and the ink area in the width unit of the ink keys 105, 205, 305, 405, that is, the ink key zone in this embodiment. A configuration is adopted in which the ink supply amount is adjusted by increasing or decreasing the ink key opening every time. In an apparatus in which the ink key is divided into fine widths, a configuration is adopted in which the ink supply amount is adjusted by associating one ink region with a plurality of ink key zones, for example, selecting adjacent ink keys as a set. May be.

  Further, the blanket 106, 206, 306, 406 and the plate cylinder 107, 207, 307, 407 are arranged on the upper side across the conveyance path of the printing sheet S, while the impression cylinder 108, 208, 308, 408 is arranged. ing. Ink roller groups 109, 209, 309 and 409 are disposed between the ink supply devices 102, 202, 302 and 402 and the plate cylinders 107, 207, 307 and 407. Therefore, the ink whose supply amount is adjusted by the ink keys 105, 205, 305, and 405 of the ink supply devices 102, 202, 302, and 402 is appropriately kneaded by the ink roller groups 109, 209, 309, and 409 to form a thin film. After that, the ink is supplied to the plate surfaces of the plate cylinders 107, 207, 307, and 407, and the ink adhered to the plate surface is transferred to the printing sheet S as a pattern through the blanket cylinders 106, 206, 306, and 406.

  In the offset printing machine of the present embodiment configured as described above, the four printing units 101, 201, 301, 401 have ink supply devices 102, 202, 302, 402, respectively, and ink keys provided correspondingly. In 105, 205, 305, and 405, the ink supply amount can be adjusted for each of a plurality (30 zones in this embodiment) of ink key zones partitioned in the print width direction.

  In the color management system of the present embodiment, the color of the test sheet that has been test printed is measured, the color based on the image information of the printed pattern is compared with the color of the test sheet, the color adjustment amount is set, and printing is performed. Select the ink key zone for color adjustment from the image corresponding to the design, set the correction color adjustment amount by entering the indicated value for the selected ink key zone, and based on the color adjustment amount and the correction color adjustment amount Thus, the ink supply amount in the ink key zone is changed.

  In this case, when the operator corrects the color adjustment for the test sheet that has been test-printed, if an instruction value for color adjustment is input, for each ink component of all selected ink key zones for color adjustment. The ink supply amount for each ink component is calculated by automatically calculating the increase / decrease amount and adding the increase / decrease amount for each ink component to the supply amount for each ink component set based on the printing standard data (image information). Is set.

  That is, in the apparatus configuration of the color tone management system in the offset printing machine of this embodiment, as shown in FIG. 1, the ink control apparatus 11 is connected to the printing units 101, 201, 301, 401 via the first parallel pass line P1. Control of the ink key opening by an ink key opening controller for controlling the adjusting screw for operating the opening of the ink keys 105, 205, 305, 405 connected, and the rotation amount of the ink original rollers 103, 203, 303, 403 It is possible to control the number of revolutions of the ink source roller by an ink source roller rotation controller that controls the driving device. The ink control device 11 has an arithmetic device 12 that controls the ink supply amount by setting a color adjustment amount for each ink key zone. The arithmetic device 12 includes a LAN board 13, a database 14, and an input device. An output port 15 is connected. The arithmetic unit 12 includes a reference ink supply amount setting unit 16, an ink increase / decrease amount setting unit 17, an ink increase / decrease amount addition unit 18, and an ink supply amount control unit 19. An adjustment amount setting unit 20 and a correction color adjustment amount setting unit 21 are provided. In this case, in this embodiment, the ink supply amount changing means of the present invention is constituted by the ink key opening controller of the printing units 101, 201, 301, 401.

  The ink control device 11 includes a color tone measuring device 23 that measures the color tone of a test sheet that has been trial-printed by an operator, and an operation device 23 that allows the operator to remotely operate the arithmetic device 12 and the like to control the ink supply amount. is doing. The ink control device 11 is connected to a CIP3 (Cooperation for Integration of Prepress, Press, Postpress) server 24 and a RIP (Raster Image Processor) 25 via a second parallel pass line P2. The CIP3 server 24 outputs PPF data including the image line ratio of the print image to the ink control device 11 through the second pass line P2 in order to set the ink supply amount of the offset printing press. The RIP 25 replaces print image data with halftone dot data, and passes this halftone dot data to the CIP3 server 24 to create PPF data.

  As shown in FIG. 2, the color tone measuring device 22 described above has a spectroscopic sensor 503 supported on a work table 501 by a scanning device 502 so as to be movable in the left-right direction, and the scanning device 502 and the spectroscopic sensor 503 are supported. A touch-type operation panel 504 to be operated is provided. Accordingly, the test sheet S that has been trial printed is fixed on the work table 501, and the color sensor is read by moving the spectral sensor 503 on the color patch row P printed on the test sheet S by the scanning device 502, The color tone in a plurality of ink key zones on the test sheet S can be measured. The color tone for each ink key zone in the test sheet S measured by the color tone measuring device 23 is output to the arithmetic unit 12 as shown in FIG.

  Further, as shown in FIG. 3, the operation device 23 includes two upper and lower touch panels 602 and 603 provided on a work table 601. The operation device 23 includes a display function (image display means) for displaying an image on the touch panels 602 and 603 based on PPF (Print Production Format) data as print standard data for forming a print pattern, and the displayed image. The operator has a color adjustment unit selection function (color adjustment ink area selection means) for selecting a plurality of ink key zones for performing color adjustment by selecting and operating the touch panels 602 and 603 with a fingertip. The touch panels 602 and 603 are connected to the arithmetic device 12, and the arithmetic device 12 is connected to the parallel path lines P1 and P2 via the hub 604.

  More specifically, as shown in FIG. 4, the operating device 23 is a touch panel type display that can be operated by touching the screen with a fingertip, and divides a printed picture image based on PPF data into ink key zones. An image display screen 31 to be displayed, a color adjustment amount display screen 32 for displaying the set color adjustment amount for each ink key zone, and a color adjustment amount operation screen 33 for performing the color adjustment amount.

  The image display screen 31 can display a print image based on the PPF data. In this case, the ink keys 105, 205, 305, and 405 of the ink supply devices 102, 202, 302, and 402 adjust the ink supply amount for each of the 30 ink key zones that are partitioned in the print width direction. An auxiliary line dividing 30 ink key zones is displayed, and ink key zone numbers (NO, 1 to 30) are displayed. Further, on the side of the image display screen 31, sheet selection switches 34a and 34b for selecting the front and back of the print sheet S, and black (K), (C), red (M), and four ink colors are provided. A color selection switch 35 for displaying an image alone in yellow (Y) is provided.

  Therefore, for example, an image in which a large number of fruits are put in a basket is displayed on the image display screen 31, and when it is desired to adjust the color of a specific fruit in the image of the fruits, the operator uses his fingertip. By touching and selecting ink key zones NO, 7 to 14 where the fruit whose color is desired to be adjusted is selected, an ink key zone for color adjustment can be set.

  The color adjustment amount display screen 32 displays the color adjustment amount for each ink key zone of the image corresponding to black (K), (C), red (M), and yellow (Y) as the four ink colors. Four display portions 36, 37, 38, 39 are provided. In this case, the horizontal line in each of the display units 36, 37, 38, and 39 is the previous adjustment reference value, and an increase in the color adjustment amount adjusted this time is displayed as a bar graph extending upward, and a bar graph in which the decrease in color adjustment amount extends downward. Is displayed. A reset switch 40 is provided below the color adjustment amount display screen 32 to reset the adjustment amount of each adjusted ink color to zero. Note that, similarly to the image display screen 31, an ink key zone for performing color adjustment can be set on the color adjustment amount display screen 32.

  In the color adjustment amount operation screen 33, eight color adjustment amounts (increase or decrease) for black (K), indigo (C), red (M), and yellow (Y) as four ink colors are set. Adjustment switches 41a, 41b, 42a, 42b, 43a, 43, 44a and 44b are provided. A unit-specific switch 45 is provided above the color adjustment amount operation screen 33, and a transmission switch 46 is provided on the side.

  Accordingly, when an ink key zone for color adjustment is set on the image display screen 31 (or color adjustment amount display screen 32), the operator can adjust each of the adjustment switches 41a, 41b, 42a, and so on on the color adjustment amount operation screen 33. By touching any of 42b, 43a, 43, 44a, and 44b, a color adjustment instruction value (increase / decrease value or decrease value) can be input for each ink color. Then, according to the operation of each of the adjustment switches 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, the indicated value, that is, black (K), indigo (C), red (M ), An increase / decrease amount for each yellow (Y) is displayed on the color adjustment amount display screen 32. In this case, when the color adjustment operation for each selected ink key zone is performed a plurality of times, the increase / decrease amount for each black (K), indigo (C), red (M), and yellow (Y) as the ink component is added. It is displayed on the color adjustment amount display screen 32 in the state. In this case, when the color adjustment operation for each selected ink key zone is performed a plurality of times, the increase / decrease amount for each black (K), indigo (C), red (M), and yellow (Y) as the ink component is added. In other words, the total amount of color adjustment for each ink component is displayed on the color adjustment amount display screen 32. By operating the transmission switch 46, the total amount of the color adjustment amount displayed on the color adjustment amount display screen 32, that is, the ink key opening can be collectively transmitted.

  In the present embodiment, as described above, when a plurality of ink key zones are selected, and the same instruction value for color adjustment is collectively set for the selected ink key zones, an optimum color that differs for each ink key zone is set. Adjustment is set automatically. That is, even if the same instruction value for color adjustment is set for a plurality of ink key zones, the line drawing rate differs for each ink key zone. The ink supply amount, that is, the ink key opening is set.

  As shown in FIG. 5, in the processing block P21, the density difference (ink film thickness) from the current ink color density is converted based on the instruction value input by the operator on the color adjustment amount operation screen 33. In the processing block P22, the image line ratio for each ink key zone is calculated based on the PPF data. Further, in the processing block P23, the rotation speed of the ink source roller in the ink supply devices 102, 202, 302, 402 is output.

  In the processing block P24, the ink key opening change amount for each ink key zone is calculated in the selected plurality of ink key zones. In this case, the control gain is set by a parameter table set in advance using the image line ratio and the ink original roller rotation speed, and the ink key opening change amount is obtained using the density difference and the control gain. In this embodiment, this calculation method is a map as shown in FIG. 6, and the map is used to set the ink key opening change amount with respect to the image line ratio. Thereafter, in processing block P25, the corrected ink key opening is set in processing block P26 by adding the ink key opening changing amount set to the current ink key opening.

  In the process of setting the ink key opening, in this embodiment, the ink key opening change amount with respect to the image line rate is set using a preset map. The ink key opening change amount may be obtained by using a calculation formula from a parameter table using the rotational speed or the like.

  Hereinafter, an ink supply amount control method using the ink control device 11 in the color tone management system of the offset printing machine according to the present embodiment will be described with reference to the flowchart of FIG.

  In the ink supply amount control method by the ink control device 11, as shown in FIG. 7, when pre-printing preparation such as attachment of the printing plate to the plate cylinder and pre-inking is completed in step S11, the illustration is shown in step S12. By operating a trial printing switch that does not, a trial printing of an image set based on the PPF data is performed. In this trial printing operation, the ink key opening controller and the ink source roller rotation controller of each ink supply device 102, 202, 302, 402 are controlled by the reference ink supply amount set based on the PPF data, and the printing unit 101, 201, 301, and 401 are operated.

  When the trial printing is completed, in step S13, the operator visually evaluates the test sheet S that has been trial printed, and determines whether or not a color adjustment operation is necessary. Here, when it is determined that the color adjustment work is not necessary for the test sheet S that has been test printed, the process proceeds to step S28, and a main printing switch (not shown) is operated to perform the main printing. On the other hand, when it is determined that the color adjustment work is necessary for the test sheet S that has been test printed, the color adjustment work for the test sheet S is started in step S14 and subsequent steps.

  First, in step S14, the operator determines whether the color adjustment based on the color tone measured by the color tone measuring device 22 is necessary, and determines that the color adjustment based on the color tone measured by the color tone measuring device 22 is unnecessary. In step S18, the process proceeds to step S18. On the other hand, if the operator determines that color adjustment based on the color tone measured by the color tone measuring device 22 is necessary, the color tone of the test sheet S using the color tone measuring device 22 in step S15, the color in the present embodiment. The color patch array P is measured as a color adjustment dedicated pattern to be adjusted. In step S16, the color adjustment amount setting unit 20 of the arithmetic unit 12 becomes a target set based on color tone data such as a density value that should be originally indicated by the reference color patch row P that is set and stored in advance. The color tone is compared with the color tone of the color patch row P of the test sheet S measured by the color tone measuring device 22, and the difference between the two is calculated. In step S17, the color tone data of the color patch row P (set and stored in advance) ( The color adjustment amount is set from the difference between the target color tone set based on the density value or the gray color value and the color tone of the color patch row P of the test sheet S measured by the color tone measuring device 22.

  Next, in step S18, the operator determines whether or not visual color adjustment is necessary. If it is determined that visual color adjustment is not necessary, the operator proceeds to step S24. On the other hand, if the operator determines that color adjustment by visual observation is necessary, in step S19, the image set on the image display screen 31 of the operation device 23 based on the PPF data, that is, the fruit pattern is displayed. Is displayed. In step S20, when the operator wants to adjust the color of a predetermined fruit with the displayed fruit pattern, the operator selects an ink key zone NO, 7 to 14 where the fruit exists with the fingertip. Subsequently, in step S21, the operator operates the unit-specific switch 45 and then adjusts the ink color adjustment switch 41a, 41b, 42a, 42b, 43a, 43 on the color adjustment amount operation screen 33 with the fingertip. , 44a, 44b are touched to input an instruction value for color adjustment. Then, the adjustment amount of each ink color is displayed on the display units 36, 37, 38, and 39 of the color adjustment amount display screen 32. In step S22, the correction color adjustment amount setting unit 21 of the arithmetic unit 12 performs visual correction. Set the color adjustment amount. At this time, when it is desired to return the set instruction value for color adjustment to the original value and perform adjustment again, the reset switch 40 is operated.

  In step S23, it is determined whether or not there is a place for color adjustment other than the specific fruit. If there is another place for color adjustment, the process returns to step S19 to return to a specific ink key on the image display screen 31. In the same manner as described above, a zone is selected, and an instruction value is input using the adjustment switches 41a, 41b, 42a, 42b, 43a, 43, 44a, 44b on the color adjustment amount operation screen 33. At this time, when the ink key zones selected for color adjustment overlap, the last adjusted instruction value is preferentially processed. Further, when the ink key zones selected for color adjustment overlap, all indicated values may be averaged and processed.

  On the other hand, if there is no other color adjustment portion in step S23, the target color tone set based on the PPF data and the test sheet S measured by the color tone measuring device 22 in step 24 are displayed. For the color adjustment amount set based on the difference from the color tone, a process of replacing the correction color adjustment amount set visually is executed. That is, the color adjustment amount set from the difference between the target color tone set based on the PPF data and the color tone of the test sheet S measured by the color tone measuring device 22 is set for all ink key zones in the pattern. However, the correction color adjustment amount set visually is set for the ink key zone selected by the operator, for example, the ink key zones No. 7 to 14 in the above description. For this reason, the color adjustment amounts of the ink key zones No. 7 to 14 are replaced with correction color adjustment amounts.

  In step S25, the arithmetic unit 12 calculates an ink increase / decrease amount for each ink component corresponding to the plurality of ink key zones selected based on the color adjustment instruction value, and for each ink component in each ink key zone. The ink increase / decrease amount is added to the ink supply amount to change the ink supply amount for each ink component. Then, the opening change amount of the ink key 105, 205, 305, 405 in the ink key zone is calculated according to the ink supply amount for each ink component, and the ink key opening is set.

  In step S25, the transmission switch 46 is operated, and the set ink key opening is collectively transmitted to the ink key opening controller of the printing unit. At this time, when the color adjustment operation is performed a plurality of times, the amount of increase / decrease for each of black (K), indigo (C), red (M), and yellow (Y) as ink components is added and the state (color adjustment amount Total amount) is displayed on the color adjustment amount display screen 32, and the total amount of color adjustment amounts displayed on the color adjustment amount display screen 32 can be collectively transmitted by operating the transmission switch 46. In step S27, the ink key openings of the large number of ink keys 105, 205, 305, and 405 in each of the ink supply devices 102, 202, 302, and 402 are changed based on the changed ink key opening for each ink component.

  Thereafter, the process returns to step S12, and the operator performs test printing by operating the test printing button. In this trial printing operation, the ink key opening controller and the ink source roller rotation controller of each ink supply apparatus 102, 202, 302, 402 are controlled by the ink supply amount changed in the color adjustment operation, and the printing units 101, 201, 301 are controlled. , 401 is operated.

  When the second trial printing is completed, in step S13, the operator visually evaluates the test sheet S that has been trial printed, and determines whether or not a color adjustment operation is necessary. Here, when it is determined that the color adjustment work is necessary again for the test sheet S that has been test-printed, as described above, the color adjustment work of the test sheet S is started after step S14. When it is determined that the color adjustment work is not necessary for the test sheet S that has been test printed, the process proceeds to step S28, where the main printing is performed, and the work is completed.

  As described above, in the offset printing press having the color tone management system according to the first embodiment, the ink supply amount can be adjusted by the ink keys 105, 205, 305, and 405 for each of a plurality of ink key zones partitioned in the printing width direction. A supply device 102, 202, 302, 402 is provided, and a color tone measuring device 22 for measuring the color tone of the test sheet S is provided. The arithmetic device 12 sets the target color tone set based on the PPF data and the color tone measuring device. The color adjustment amount is set from the color tone of the test sheet S measured by the operator 22, and the correction color adjustment amount is set by visually adjusting the ink key zone selected by the operator using the operation device 23. The ink supply amount in the ink key zone is changed based on the amount and the correction color adjustment amount.

  Accordingly, the color adjustment amount is set from the target color tone set based on the PPF data and the color tone of the test sheet S measured by the color tone measuring device 22, and the operation device 23 is set for the ink key zone selected by the operator. The correction color adjustment amount is set by visual inspection using the, and the ink supply amount is changed based on the color adjustment amount and the correction color adjustment amount. With respect to the color adjustment amount based on the color tone of the test sheet S, Only the selected predetermined ink key zone can be set to the correction color adjustment amount according to the instruction value of the operator. At this time, if the color adjustment amount is indicated for the selected ink area, the ink component in the ink area is set. The adjustment amount for each ink area is automatically set, and the ink supply amount for each of the plurality of ink areas partitioned in the print width direction can be adjusted in detail and easily. It can be, it is possible to improve the workability by realizing simplification of color adjustment work, it is possible to reduce the burden on the operator.

  In the present embodiment, a plurality of ink key zones for color adjustment are selected from the image displayed on the image display screen 31, and the color adjustment amount of the selected ink key zone is set to the same instruction value and image line ratio. Based on the number of revolutions of the ink base roller, it is set as an optimum value that is different for each ink key zone. Accordingly, the ink supply amount of each ink key zone having a different image area ratio can be adjusted easily and in a short time, and workability can be improved.

  In this case, even if a plurality of ink key zones are selected and the same color adjustment amount instruction value is designated for the selected ink key zone, the image line rate of each ink key zone is different. An appropriate ink supply amount cannot be set. Therefore, in the first embodiment, the same instruction value for the color adjustment amount instructed to a plurality of ink key zones is set for each ink key zone using the image line ratio, the ink source roller rotation speed, and the control gain parameter. By calculating as different optimum values and setting an optimum ink supply amount, an appropriate ink supply amount can be set.

  In the offset printing machine having the ink control device of the first embodiment, images corresponding to black (K), indigo (C), red (M), and yellow (Y) as four ink colors are displayed. A color adjustment amount display screen 32 having four display portions 36, 37, 38, 39 for displaying the color adjustment amount for each ink key zone is provided, and all the adjustment amounts for performing the color adjustment work for each selected ink key zone are displayed. The total amount of color adjustment amount for each ink component is displayed on this color adjustment amount display screen 32, and the total amount of color adjustment amount displayed on this color adjustment amount display screen 32 is obtained by operating the transmission switch 46. Sending in bulk. Therefore, by sending the total amount of color adjustment in a batch, the color adjustment work for each ink key zone can be performed multiple times, the color adjustment amount can be corrected, or reset, and workability can be improved. it can.

  In addition, since the color adjustment by the operating device 23 can be performed in parallel with the measurement of the color patch row P by the color tone measuring device 22, the operating device is used by using the dead time during the measurement of the color patch row P. Since the adjustment can be performed manually from the 23 color adjustment amount operation screen 33, the total color adjustment time can be shortened.

  FIG. 9 is a schematic diagram illustrating an operation screen in the ink control device of the color management system according to the second embodiment of the present invention, FIG. 10 is a schematic configuration diagram of the ink control device of the color management system according to the second embodiment, and FIG. 5 is a flowchart of ink supply amount control of an ink control device in a printing press having the color tone management system of Example 2. The overall configuration of the offset printing machine and the color tone management system of the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIGS. 1 and 8 and the same as that described in the first embodiment. The members having the above functions are denoted by the same reference numerals and redundant description is omitted.

  The offset printing machine according to the second embodiment has a color tone management system having substantially the same configuration as that of the first embodiment described above, and only the operation device is different. That is, in the offset printing press having the color tone management system of the second embodiment, as shown in FIG. 9, the operation device 51 for operating the offset printing press of the present embodiment is a touch panel that can be operated by touching the screen with a fingertip. An image display screen 31 that displays a printed pattern image based on PPF data divided into ink key zones, and a color adjustment amount display screen 32 that displays a set color adjustment amount for each ink key zone. And a color adjustment amount operation screen 52 for performing a color adjustment amount.

  The image display screen 31 can display a print image based on the PPF data. On the side of the image display screen 31, sheet selection switches 34a and 34b for selecting the front and back of the print sheet S and 4 A color selection switch 35 is provided for displaying an image with black (K), indigo (C), red (M), and yellow (Y) alone as two ink colors. Further, a representative color selection switch 53 for selecting a representative image (representative color) in the image displayed on the image display screen 31 is provided on the side of the image display screen 31, and the selected representative color is stored. The five representative color display parts (storage parts) 54a, 54b, 54c, 54d and 54e are provided.

  Therefore, for example, an image in which a large number of fruits are put in a basket is displayed on the image display screen 31, and when it is desired to adjust the color of a specific fruit in the image of the fruits, the operator uses his fingertip. By touching and selecting ink key zones NO, 7 to 14 where the fruit whose color is desired to be adjusted is selected, an ink key zone for color adjustment can be set. Then, when it is desired to adjust the color of a specific part of the fruit, the representative color selection switch 53 is touched, and then the specific part (representative image) of the fruit is touched with a fingertip, so that the image of the specific part is 5 It can be displayed and stored in one of the two representative color display portions 54a, 54b, 54c, 54d, 54e. In this case, five representative images can be stored. Further, even if the representative color selection switch 53 is touched after touching a specific portion (representative image) of the fruit with the fingertip, the image of this specific portion is displayed on the representative color display portions 54a, 54b, 54c, 54d, 54e. It can be displayed and stored.

  The color adjustment amount display screen 32 displays the color adjustment amount for each ink key zone of the image corresponding to black (K), (C), red (M), and yellow (Y) as the four ink colors. Four display portions 36, 37, 38, 39 are provided. A reset switch 40 is provided below the color adjustment amount display screen 32 to reset the adjustment amount of each adjusted ink color to zero.

  The color adjustment amount operation screen 52 is provided with a color adjustment device 55 for setting color adjustment amounts of indigo (C), red (M), and yellow (Y) as three ink colors. The color adjusting device 55 is provided inside and outside a ring-shaped ring 56, and adjusts switches 57a, 57b, and 58a for increasing and decreasing the color adjustment amounts of indigo (C), red (M), and yellow (Y). , 58b, 59a, 59b and an adjustment switch 60a for increasing / decreasing the color adjustment amount of blue (Blue), red (Red), and green (Green), which are intermediate colors of indigo (C), red (M), and yellow (Y). , 60b, 61a, 61b, 62a, 62b. In addition, a graph display unit 63 that displays the color adjustment amounts of indigo (C), red (M), and yellow (Y) in a graph is provided at the center of the ring 56, and the color adjustment is provided in the ring 56. A degree display unit 64 for displaying the degree is provided.

  Further, selection switches 65a, 65b, 65c, and 65d corresponding to indigo (C), red (M), yellow (Y), and black (K) are provided on the side of the color adjusting device 55, and each color. Control amount display portions 66a, 66b, 66c, and 66d for displaying the control amount (adjustment amount) are provided. Adjacent to this, indigo (C), red (M) and yellow (Y) are provided with the same amount of increase / decrease, that is, density adjustment switches 67a and 67b for adjusting the density. M), individual adjustment switches 68a and 68b for increasing / decreasing individually yellow (Y) and black (K) are provided.

  Further, on the side of the color adjustment device 55, a pre-operation display unit (pre-adjustment display unit) 69 for displaying a representative color (print color, representative image) before the color adjustment operation is performed, and a color adjustment operation is performed. A post-operation display unit (post-adjustment display unit) 70 for displaying a later representative color (representative image) is provided. In this case, the representative color based on the PPF data can be displayed on the pre-operation display unit 69, and the representative color adjusted by the color adjustment device 55 can be displayed on the post-operation display unit 70. The representative colors displayed on the pre-operation display unit 69 and the post-operation display unit 70 are the representative colors of the representative image selected by the representative color selection switch 53 described above. An area ratio display unit 71 that displays the area ratio of each color in the representative image is provided.

  In the color adjustment amount operation screen 52, the color difference between the print color before adjustment displayed on the pre-operation display unit 69 and the print color after adjustment displayed on the post-operation display unit 70 in this representative image. Is displayed using a deviation value in the CIELAB color space. The color difference display unit 72 includes a deviation Δa in the a-axis direction in the CIELAB color space, a deviation Δb in the b-axis direction, a color difference ΔE between the a, b, and L, and a deviation ΔL in the L axis that intersects the a axis and the b axis. (Or brightness) and hue deviation ΔH are displayed. A color balance switch 73 is provided above the color adjustment amount operation screen 52, and a registration switch 74, a reset switch 75, and a transmission switch 46 are provided on the sides.

  Accordingly, when an ink key zone for color adjustment is set on the image display screen 31 (or color adjustment amount display screen 32) and a representative image is selected by the representative color selection switch 53, the operator operates the color adjustment amount. Touching any of the adjustment switches 57a, 57b, 58a, 58b, 59a, 59b and the adjustment switches 60a, 60b, 61a, 61b, 62a, 62b on the screen 52 for each ink color (indigo, red, yellow) Alternatively, it is possible to input a color adjustment instruction value (increase / decrease value or decrease value) for each of the intermediate colors (blue, red, green). In this case, for example, when the adjustment switches 61a and 61b corresponding to red are operated, the operation load is reduced by simultaneously adjusting the red and yellow ink colors. Then, according to the operation of each of the adjustment switches 57a, 57b, 58a, 58b, 59a, 59b, 60a, 60b, 61a, 61b, 62a, 62b, the indicated value, that is, black (K) as an ink component, The increase / decrease amount for each of indigo (C), red (M), and yellow (Y) is displayed as a numerical value on the control amount display portions 66a, 66b, 66c, and 66d, and is displayed as a bar graph on the color adjustment amount display screen 32. .

  In the color adjustment amount operation screen 52, the representative color of the representative image based on the PPF data is displayed on the pre-operation display unit 69, and the representative adjusted by the color adjustment device 55 is displayed on the post-operation display unit 70. The representative colors of the image are displayed, and the operator can perform color adjustment while comparing the representative colors displayed on the pre-operation display unit 69 and the post-operation display unit 70. Furthermore, the operator can perform color adjustment while looking at the control amount display units 66a, 66b, 66c, 66d, the area ratio display unit 71, and the color difference display unit 72 as a guide.

  When color adjustment is performed on a plurality of ink key zones or a plurality of representative images, the registration switch 74 is operated each time, and the instruction value of the color adjustment amount at that time is stored in the color adjustment amount display screen 32. By operating the reset switch 75, the instruction value of the color adjustment amount at that time can be canceled.

  Next, processing of the ink control device 11 controlled by the operation device 51 described above will be described in detail. When the operator inputs a color adjustment instruction value (increase / decrease amount) using the operation device 51, the color adjustment instruction value is output to the arithmetic device 12 of the ink control device 11, where the ink supply amount for each ink component is set. Is done.

  That is, as shown in FIG. 10, in the processing block P31, when a representative point (representative image) is selected on the image display screen 31 of the controller device 23, halftone dot area ratio data of the representative point is acquired from the PPF data, Spectral reflectance is calculated using a light emission table describing the relationship between halftone dot area ratio and spectral reflectance, and a color value (Lab value, etc.) of a standard color is calculated. In the processing block P32, the ink supply amount for each ink component is calculated based on the obtained spectral reflectance of the representative point.

  The ink supply amount for each ink component before the adjustment is calculated using the following formula 1. That is, using the spectral reflectance at the halftone dot area ratio of the representative point obtained as described above, the spectral reflectance is converted into the spectral density, and the standard spectral halftone dot density from the halftone dot area ratio of the representative point is converted. Is substituted into Equation 1 below. Then, by performing a multiple regression calculation using the formula 1, the ink component amounts tc, tm, ty, and tk for each ink component are calculated.

  On the other hand, the operator looks at the pre-operation display unit 69 and the post-operation display unit 70 of the color adjustment amount operation screen 52 in the operation device 51, performs visual evaluation, and determines an instruction value. In the processing block P33, the color adjustment instruction value is input using the color adjusting device 55 of the operating device 51. Then, in the processing block P34, the ink increase / decrease amount for each ink component is set (ink increase / decrease amount setting unit 17) based on the color adjustment instruction value. In the processing block P35, the ink component increase / decrease amount is added to the ink component amounts tc, tm, ty, tk determined as described above (ink increase / decrease amount adding unit 18), and the ink component is processed using the processing block P36. The representative color after color adjustment is calculated from the amount back to the spectral reflectance, and is displayed on the display unit 70 after operation. The difference between the color value of the standard color obtained as described above and the adjusted color value (deviation Δa in the a-axis direction in the CIELAB color space, deviation Δb in the b-axis direction, and the color difference ΔE between a, b, and L, The deviation ΔL (or lightness) in the L-axis direction intersecting the a-axis and the b-axis and the hue deviation ΔH are displayed, and it is possible to determine the indicated value with reference to these values. In P37, the ink supply amount supplied by the large number of ink keys 105, 205, 305, 405 in each ink supply device 102, 202, 302, 402 is controlled according to the changed ink supply amount for each ink component (ink supply amount). Control unit 19).

  Hereinafter, an ink supply amount control method by the ink control device 11 in the color tone management system of the offset printing machine according to the present embodiment will be described with reference to the flowchart of FIG. Here, only the method of changing the ink opening degree using the operation device 51 will be described.

  In the ink supply amount control method by the ink control device 11, as shown in FIG. 11, an image set based on the PPF data, that is, a fruit pattern is displayed on the image display screen 31 of the operation device 51 in step 31. To do. Next, when it is desired to adjust the color of a predetermined fruit in the displayed fruit pattern at step S32, the operator selects ink key zones NO, 7 to 14 where the fruit exists with the fingertip. Subsequently, in step S33, when it is desired to color-adjust a specific portion of the fruit in the selected ink key zone, the operator touches the representative color selection switch 53, and then the operator touches the specific portion (representative image) of the fruit with the fingertip. To do. Then, an image (color) of a specific portion of the selected fruit is displayed and stored on the representative color display unit 54a, for example. In step S34, the representative color of the representative image based on the PPF data is displayed as a standard color on the pre-operation display unit 69.

  In step S35, after the operator operates the color balance switch 73, the adjustment switches 57a, 57b, 58a, 58b, 59a, 59b, 60a, By touching 60b, 61a, 61b, 62a, and 62b, an instruction value for color adjustment is input. Then, the representative color of the representative image adjusted by the color adjusting device 55 is displayed on the post-operation display unit 70. At this time, when it is desired to return the set instruction value for color adjustment to the original value and perform adjustment again, the reset switch 40 is operated.

  In step S37, the operator compares the color before operation displayed on the pre-operation display unit 69 with the color after adjustment displayed on the post-operation display unit 70, and whether or not the operator's adjustment intention is sufficiently reflected. Judging. Here, when it is determined that the adjusted color displayed on the post-operation display unit 70 sufficiently reflects the operator's adjustment intention, the color is determined by operating the registration switch 74 in step S38. The adjustment amount of each ink color is displayed on the display portions 36, 37, 38, 39 of the adjustment amount display screen 52. On the other hand, if it is determined in step S37 that the adjusted color displayed on the post-operation display unit 70 does not sufficiently reflect the operator's adjustment intention, the process returns to step S34 and the color adjustment operation is repeated. In this case, when a color adjustment operation is performed by an operator who has sufficient experience, the adjustment switches 57a, 57b, 58a, 58b, 59a, 59b, 60a, 60b, 61a, 61b and 62a can be selected without selecting a representative color. , 62b can be operated to adjust the color.

  In step S39, it is determined whether or not there is a place for color adjustment other than the specific fruit. If there is another place for color adjustment, the process returns to step S31, and a specific ink key zone on the image display screen 31 is set. In the same manner as described above, the instruction value is input using the color adjustment device 55 on the color adjustment amount operation screen 52. At this time, when the ink key zones selected for color adjustment overlap, the last adjusted instruction value is preferentially processed.

  On the other hand, in step S39, if there is no other portion where color adjustment is performed, in step S40, the arithmetic unit 12 selects ink corresponding to the plurality of ink key zones selected based on the color adjustment instruction value. The ink increase / decrease amount for each component is calculated, the ink increase / decrease amount is added to the ink supply amount for each ink component in each ink key zone, and the ink supply amount for each ink component is changed. Then, the opening change amount of the ink key 105, 205, 305, 405 in the ink key zone is calculated according to the ink supply amount for each ink component, and the ink key opening is set. In step S41, the transmission switch 46 is operated to transmit the set ink key opening in a batch. In step S42, the ink key openings of a number of ink keys 105, 205, 305, and 405 in each of the ink supply devices 102, 202, 302, and 402 are changed based on the changed ink key openings for each ink component.

  As described above, in the offset printing press having the color tone management system according to the second embodiment, the image display screen 31 that displays the image based on the PPF data in the ink key zone and displays the set color adjustment amount in the ink key zone. An operation device 51 having a color adjustment amount display screen 32 to be displayed every time and a color adjustment amount operation screen 52 for performing color adjustment amount is provided, and an ink key zone for performing color adjustment is selected from an image displayed on the image display screen 31 The color adjustment amount of the ink key zone selected on the color adjustment amount operation screen 52 is set for each ink key zone.

  Therefore, when the instruction value of the color adjustment amount for a plurality of selected ink key zones for color adjustment is input, the increase / decrease amount of the ink component for each ink key zone is set, and the print width direction is partitioned. The ink supply amount for each of the plurality of ink key zones can be easily adjusted, and the workability can be improved by simplifying the color adjustment work, and the burden on the operator can be reduced. .

  In this embodiment, a representative color selection switch 53 for selecting a representative image (representative color) in the print image displayed on the image display screen 31 is provided, and a representative color display for storing and displaying the selected representative color is provided. Portions 54a, 54b, 54c, 54d, and 54e are provided. Therefore, by selecting a representative image in the ink key zone, it is possible to easily adjust a predetermined color at a predetermined location where color adjustment is particularly desired, and by storing the selected representative image, the color of the pixel at the same location Adjustment can be easily performed repeatedly.

  Further, in this embodiment, when the representative color before color adjustment is displayed on the pre-operation display unit 69 of the color adjustment amount operation screen 52 and the color adjustment instruction value is input by operating the color adjustment device 55, the pre-operation display is displayed. The representative color after color adjustment is displayed on the portion 70. Therefore, by comparing the representative color before color adjustment displayed on the pre-operation display unit 69 with the representative color after color adjustment displayed on the pre-operation display unit 70, whether or not the operator's adjustment intention is reflected. Can be confirmed, the number of trial printings can be reduced, the printing time can be shortened, and the operation cost can be reduced.

  Further, in this embodiment, in the representative image selected on the color adjustment amount operation screen 52, the color difference between the print color before adjustment based on the image information and the print color after adjustment based on the color adjustment amount is calculated. In addition, a color difference display unit 72 that displays using deviation values in the CIELAB color space is provided. Therefore, the operator can adjust the print color while confirming the deviation value of the color difference display unit 72, and the workability can be improved.

  FIG. 12 is a schematic diagram illustrating an operation screen in the ink control device of the color management system according to the third embodiment of the present invention. FIG. 13 is an ink supply amount of the ink control device in a printing press having the color management system according to the third embodiment. It is a flowchart of control. The overall configuration of the offset printing machine and the color tone management system of the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIGS. 1 and 8 and the same as that described in the first embodiment. The members having the above functions are denoted by the same reference numerals and redundant description is omitted.

  The offset printing machine according to the third embodiment has a configuration similar to that of the first embodiment described above in the color tone management system, and only the operation device is different. That is, in the offset printing press having the color tone management system of the third embodiment, as shown in FIG. 12, the operation device 81 for operating the offset printing press of this embodiment is a touch panel that can be operated by touching the screen with a fingertip. An image display screen 31 that displays a printed pattern image based on PPF data divided into ink key zones, and a color adjustment amount display screen 32 that displays a set color adjustment amount for each ink key zone. And a color adjustment amount operation screen 82 for performing a color adjustment amount.

  The image display screen 31 can display a print image based on the PPF data. On the side of the image display screen 31, sheet selection switches 34a and 34b for selecting the front and back of the print sheet S and 4 A color selection switch 35 for displaying an image with only black (K), indigo (C), red (M), and yellow (Y) as two ink colors, and a representative image in the image displayed on the image display screen 31 A representative color selection switch 53 for selecting (representative color) and five representative color display sections (storage sections) 54a, 54b, 54c, 54d, 54e for storing and displaying the selected representative color are provided.

  Accordingly, the operator can set the ink key zone for color adjustment by touching and selecting the ink key zone NO, 7 to 14 where the fruit whose color is desired to be adjusted is touched with the fingertip, and touch the representative color selection switch 53. Then, by touching a specific portion (representative image) of the fruit with a fingertip, the image of the specific portion is changed to one of the five representative color display portions 54a, 54b, 54c, 54d, and 54e. It can be displayed and stored.

  The color adjustment amount display screen 32 displays the color adjustment amount for each ink key zone of the image corresponding to the four ink colors black (K), indigo (C), red (M), and yellow (Y). There are provided four display units 36, 37, 38, 39 and a reset switch 40 for resetting the adjusted amount of each adjusted ink color to zero.

  The color adjustment amount operation screen 82 is used to set a color adjustment amount based on hue, brightness, and saturation corresponding to indigo (C), red (M), and yellow (Y) as each ink color. A color adjusting device 83 is provided. The color adjusting device 83 includes adjustment switches 84a, 84b, 85a, 85b, 86a, 86b that increase / decrease the color adjustment amount of hue, brightness, and saturation. In the center of each of the adjustment switches 84a, 84b, 85a, 85b, 86a, 86b, a pre-operation display unit 87 that displays a representative color (representative image) before the color adjustment operation is performed, and a color adjustment operation is performed. A post-operation display unit 88 that displays the representative color (representative image) after the operation is provided. In this case, the representative color based on the PPF data can be displayed on the pre-operation display unit 87, and the representative color adjusted by the color adjusting device 55 can be displayed on the post-operation display unit 88.

  The color adjustment amount operation screen 82 is provided with an area ratio display unit 71 that displays the area ratio of each color in the representative image. In the color adjustment amount operation screen 82, the color difference between the pre-adjustment print color displayed on the pre-operation display unit 69 and the post-adjustment print color displayed on the post-operation display unit 70 in the representative image is displayed. A color difference display unit 72 is provided for displaying using deviation values in the CIELAB color space.

  In addition, on the side of the color adjusting device 55, selection switches 65a, 65b, 65c, and 65d corresponding to indigo (C), red (M), yellow (Y), and black (K), and control amounts of the respective colors. Control amount display units 66a, 66b, 66c, and 66d that display (adjustment amount), and indigo (C), red (M), and yellow (Y) increase / decrease by the same amount, that is, density adjustment switches 67a, 67b, and individual adjustment switches 68a and 68b for individually increasing / decreasing indigo (C), red (M), yellow (Y), and black (K).

  In addition, a hue, brightness, and saturation switch 89 is provided above the color adjustment amount operation screen 82, and a registration switch 74, a reset switch 75, and a transmission switch 46 are provided on the sides.

  Accordingly, when an ink key zone for color adjustment is set on the image display screen 31 (or color adjustment amount display screen 32) and a representative image is selected by the representative color selection switch 53, the operator operates the color adjustment amount. By touching any of the adjustment switches 84a, 84b, 85a, 85b, 86a, 86b of the color adjustment device 83 on the screen 82, the color adjustment instruction value (increase / decrease value or decrease value) for each hue, lightness, and saturation. Can be entered. Then, according to the operation of each of the adjustment switches 84a, 84b, 85a, 85b, 86a, 86b, the indicated value, that is, black (K), indigo (C), red (M), yellow ( The increase / decrease amount for each Y) is displayed as a numerical value on the control amount display portions 66a, 66b, 66c, 66d, and is displayed as a bar graph on the color adjustment amount display screen 32.

  In the color adjustment amount operation screen 82, the representative color of the representative image based on the PPF data is displayed on the pre-operation display unit 87, and the representative adjusted by the color adjustment device 83 is displayed on the post-operation display unit 88. The representative colors of the image are displayed, and the operator can perform color adjustment while comparing the representative colors displayed on the pre-operation display unit 87 and the post-operation display unit 88. Furthermore, the operator can perform color adjustment while looking at the control amount display units 66a, 66b, 66c, 66d, the area ratio display unit 71, and the color difference display unit 72 as a guide.

  Hereinafter, an ink supply amount control method by the ink control device 11 in the color tone management system of the offset printing machine according to the present embodiment will be described with reference to the flowchart of FIG.

  In the ink supply amount control method by the ink control device 11, as shown in FIG. 13, in step 51, an image set based on the PPF data, that is, a fruit pattern is displayed on the image display screen 31 of the operation device 81. To do. Next, in step 52, when it is desired to adjust the color of a predetermined fruit in the displayed fruit pattern, the operator selects ink key zones NO, 7 to 14 where the fruit exists at the fingertip. Subsequently, when it is desired to adjust the color of a specific part of the fruit in the selected ink key zone in step 53, after touching the representative color selection switch 53, the operator touches the specific part (representative image) of the fruit with the fingertip. To do. Then, an image (color) of a specific portion of the selected fruit is displayed and stored on the representative color display unit 54a, for example. In step 54, the representative color of the representative image based on the PPF data is displayed on the pre-operation display unit 87 as a standard color.

  In step 55, after the operator operates the hue / brightness / saturation switch 89, the adjustment switch 84a, 84b, 85a, 85b, 86a, By touching 86b, an instruction value for color adjustment is input. Then, in step S56, the representative color of the representative image adjusted by the color adjusting device 83 is displayed on the post-operation display unit 88. At this time, when it is desired to return the set instruction value for color adjustment to the original value and perform adjustment again, the reset switch 40 is operated.

  In step S57, the operator compares the pre-operation color displayed on the pre-operation display unit 87 with the adjusted color displayed on the post-operation display unit 88, and determines whether the operator's adjustment intention is sufficiently reflected. to decide. Here, when it is determined that the adjusted color displayed on the post-operation display unit 88 sufficiently reflects the operator's adjustment intention, the color is determined by operating the registration switch 74 in step S58. The adjustment amount of each ink color is displayed on the display portions 36, 37, 38, 39 of the adjustment amount display screen 33. On the other hand, when it is determined in step S60 that the adjusted color displayed on the post-operation display unit 88 does not sufficiently reflect the operator's adjustment intention, the process returns to step 37 to repeat the color adjustment work.

  In step S59, it is determined whether or not there is a place for color adjustment other than the specific fruit. If there is another place for color adjustment, the process returns to step 51, and a specific ink key zone on the image display screen 31 is set. In the same manner as described above, an instruction value is input using the color adjustment device 83 on the color adjustment amount operation screen 82. At this time, when the ink key zones selected for color adjustment overlap, the last adjusted instruction value is preferentially processed.

  On the other hand, if there is no other color adjustment in step S59, in step S60, the arithmetic unit 12 selects ink corresponding to the plurality of ink key zones selected based on the color adjustment instruction value. The ink increase / decrease amount for each component is calculated, the ink increase / decrease amount is added to the ink supply amount for each ink component in each ink key zone, and the ink supply amount for each ink component is changed. Then, the opening change amount of the ink key 105, 205, 305, 405 in the ink key zone is calculated according to the ink supply amount for each ink component, and the ink key opening is set. In step S61, the transmission switch 46 is operated to transmit the set ink key opening in a batch. In step S62, the ink key openings of a number of ink keys 105, 205, 305, and 405 in each of the ink supply devices 102, 202, 302, and 402 are changed based on the changed ink key openings for each ink component.

  As described above, in the offset printing press having the color tone management system according to the third embodiment, the image display screen 31 that displays an image based on the PPF data in the ink key zone and displays the set color adjustment amount in the ink key zone. An operation device 81 having a color adjustment amount display screen 32 to be displayed every time and a color adjustment amount operation screen 82 for performing color adjustment amount is provided, and an ink key zone for performing color adjustment is selected from an image displayed on the image display screen 31 The color adjustment amount of the ink key zone selected on the color adjustment amount operation screen 82 is set for each ink key zone.

  Therefore, when the instruction value of the color adjustment amount for a plurality of selected ink key zones for color adjustment is input, the increase / decrease amount of the ink component for each ink key zone is set, and the print width direction is partitioned. The ink supply amount for each of the plurality of ink key zones can be easily adjusted, and the workability can be improved by simplifying the color adjustment work, and the burden on the operator can be reduced. .

  In this embodiment, the color adjustment amount operation screen 82 corresponds to indigo (C), red (M), and yellow (Y) as each ink color, and color adjustment is performed based on hue, brightness, and saturation. A color adjusting device 83 for setting the amount is provided. Accordingly, when an ink key zone for color adjustment is set on the image display screen 31 and a representative image is selected by the representative color selection switch 53, the operator adjusts the adjustment switches 84a, 84b, 85a, 85b of the color adjustment device 83. , 86a, 86b, the instruction value for color adjustment can be input for each hue, brightness, and saturation. Further, at this time, the representative color before color adjustment is displayed on the pre-operation display unit 87, and the representative color after color adjustment is displayed on the pre-operation display unit 88, whereby the color adjustment displayed on the pre-operation display unit 69 is displayed. While comparing the previous representative color with the representative color after color adjustment displayed on the pre-operation display unit 70, it is possible to confirm whether the operator's adjustment intention is reflected. As a result, the number of trial printings can be reduced to shorten the printing time, and the work cost can be reduced.

  In the first embodiment, the unit-specific switch 45 is operated, and then color adjustment is performed on the color adjustment operation screen 33 using the switches corresponding to the four ink colors. In the second embodiment, the color balance switch 73 is operated. After that, the color adjustment operation screen 52 is used to adjust the colors by switches corresponding to the four ink colors arranged in an annular shape and the intermediate colors. In the third embodiment, the hue / lightness / saturation switch 89 is operated before the color adjustment. The color is adjusted by the hue / lightness / saturation switch on the adjustment operation screen 82. In this case, by appropriately combining the first to third embodiments, an operation device having each function or any one of the functions may be used, and may be configured to be selectively usable according to the operator's intention.

  FIG. 14 is a schematic configuration diagram of a color tone management system according to the fourth embodiment of the present invention, and FIG. 15 is an external view of a color tone measurement device in the color tone management system according to the second embodiment. The overall configuration of the offset printing machine according to the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIG. 8 and members having the same functions as those described in the first embodiment may be used. The description which attaches | subjects the same code | symbol and overlaps is abbreviate | omitted.

  In the offset printing press having the color tone management system of the fourth embodiment, as shown in FIG. 8, the four printing units 101, 201, 301, 401 have ink supply devices 102, 202, 302, 402, respectively. The ink keys 105, 205, 305, and 405 provided as described above increase or decrease the ink key opening degree as an adjustment of the ink supply amount for each of a plurality of ink key zones (30 zones in this embodiment) partitioned in the printing width direction. Adjustments can be made.

  In the color management system of the present embodiment, the color of the test sheet that has been test printed is measured, the color based on the image information of the printed pattern is compared with the color of the test sheet, the color adjustment amount is set, and printing is performed. Select the ink key zone for color adjustment from the image corresponding to the design, set the correction color adjustment amount by entering the indicated value for the selected ink key zone, and based on the color adjustment amount and the correction color adjustment amount Thus, the ink supply amount in the ink key zone is changed.

  In this case, when the operator corrects the color adjustment for the test sheet that has been test-printed, if an instruction value for color adjustment is input, for each ink component of all selected ink key zones for color adjustment. The ink supply amount for each ink component is calculated by automatically calculating the increase / decrease amount and adding the increase / decrease amount for each ink component to the supply amount for each ink component set based on the printing standard data (image information). Is set.

  That is, in the apparatus configuration of the color tone management system in the offset printing machine of this embodiment, as shown in FIG. 14, the ink control apparatus 11 is connected to the printing units 101, 201, 301, 401 via the first parallel pass line P1. Control of the ink key opening degree by an ink key opening degree controller for controlling an adjusting screw for operating the opening degree of the ink keys 105, 205, 305, 405 connected, and the rotation amount of the ink source rollers 103, 203, 303, 403. It is possible to control the number of revolutions of the ink source roller by an ink source roller rotation controller that controls the driving device. The ink control device 11 has an arithmetic device 12 that controls the ink supply amount by setting a color adjustment amount for each ink key zone. The arithmetic device 12 includes a LAN board 13, a database 14, and an input device. An output port 15 is connected. The arithmetic unit 12 includes a reference ink supply amount setting unit 16, an ink increase / decrease amount setting unit 17, an ink increase / decrease amount addition unit 18, and an ink supply amount control unit 19. An adjustment amount setting unit 20 and a correction color adjustment amount setting unit 21 are provided.

  The ink control device 11 is an operation that allows the operator to remotely control the color tone measuring device 26 that measures the color tone of a test sheet that has been trial printed, and the operator to remotely control the arithmetic device 12 and the like to control the ink supply amount. A device 23 is included. The ink control device 11 is connected to a CIP3 (Cooperation for Integration of Prepress, Press, Postpress) server 24 and a RIP (Raster Image Processor) 25 via a second parallel pass line P2. The CIP3 server 24 outputs PPF data including the image line ratio of the print image to the ink control device 11 through the second pass line P2 in order to set the ink supply amount of the offset printing press. The RIP 25 replaces print image data with halftone dot data, and passes this halftone dot data to the CIP3 server 24 to create PPF data.

  As shown in FIG. 15, the color tone measuring device 26 described above is configured such that a spectroscopic sensor 703 is supported on a work table 701 by a scanning device 702 so as to be movable in the left-right direction. Therefore, the test sheet S that has been trial printed is fixed on the work table 701, and the spectroscopic sensor 703 prints over the entire surface of the test sheet S by moving the spectroscopic sensor 703 on the print pattern of the test sheet S by the scanning device 702. It is possible to read the design and measure the color tone in a plurality of ink key zones on the test sheet S. Then, the color tone for each ink key zone in the test sheet S measured by the color tone measuring device 23 is output to the arithmetic device 12 as shown in FIG.

  Therefore, as shown in FIG. 14, the operator visually evaluates the test printed sheet S, determines whether the color adjustment work is necessary, and determines that the color adjustment work is necessary. First, the color tone of the test sheet S is measured using the color tone measuring device 26, and the color adjustment amount setting unit 20 of the arithmetic device 12 is measured by the target color tone and color tone measuring device 26 set based on the PPF data. The color adjustment amount is set by comparing the color tone of the test sheet S.

  Next, the operator selects an ink key zone in which a picture to be color-adjusted exists by using the operation device 23 and inputs an instruction value for color adjustment, so that the correction color adjustment amount setting unit 20 of the arithmetic device 12 is set. The correction color adjustment amount by visual inspection is set.

  The correction color adjustment amount set visually is set to the color adjustment amount set from the difference between the target color tone set based on the PPF data and the color tone of the test sheet S measured by the color tone measuring device 26. The replacement and calculation device 12 calculates the ink increase / decrease amount for each ink component corresponding to the plurality of ink key zones selected based on the color adjustment instruction value, and calculates the ink supply amount for each ink component in each ink key zone. Add the ink increase / decrease amount and change the ink supply amount for each ink component. Then, the ink key opening degree is calculated according to the ink supply amount for each ink component, the ink key opening degree is set, and the ink key opening degree is changed by transmitting all at once.

  As described above, in the offset printing press having the color tone management system according to the fourth embodiment, the ink supply amount can be adjusted by the ink keys 105, 205, 305, and 405 for each of the plurality of ink key zones partitioned in the printing width direction. A supply device 102, 202, 302, 402 is provided, and a color tone measuring device 26 for measuring the color tone of the test sheet S is provided. The arithmetic device 12 sets a target color tone set based on the PPF data and the color tone measuring device. The color adjustment amount is set based on the color tone of the test sheet S measured by 26, and the correction color adjustment amount is set by visually adjusting the ink key zone selected by the operator using the operation device 23. The ink supply amount in the ink key zone is changed based on the amount and the correction color adjustment amount.

  Accordingly, the color adjustment amount is set from the target color tone set based on the PPF data and the color tone of the test sheet S measured by the color tone measuring device 26, and the operation device 23 is set for the ink key zone selected by the operator. The correction color adjustment amount is set by visual inspection using the, and the ink supply amount is changed based on the color adjustment amount and the correction color adjustment amount. With respect to the color adjustment amount based on the color tone of the test sheet S, Only the selected predetermined ink key zone can be set to the correction color adjustment amount according to the instruction value of the operator. At this time, if the color adjustment amount is indicated for the selected ink area, the ink component in the ink area is set. The adjustment amount for each ink area is automatically set, and the ink supply amount for each of the plurality of ink areas partitioned in the print width direction can be adjusted in detail and easily. It can be, it is possible to improve the workability by realizing simplification of color adjustment work, it is possible to reduce the burden on the operator.

  In addition, since the color adjustment by the operation device 23 can be performed in parallel with the measurement of the printed pattern of the test sheet S by the color tone measuring device 26, the waste time during the measurement of the color patch row P is utilized, Since the adjustment can be manually performed from the color adjustment amount operation screen of the operation device 23, the total color adjustment time can be shortened.

  FIG. 16 is a schematic configuration diagram of a color tone management system according to the fifth embodiment of the present invention, FIG. 17 is a schematic diagram illustrating an operation screen in the ink control device of the color tone management system according to the fifth embodiment, and FIG. 4 is a flowchart of ink supply amount control of an ink control device in a printing press having a color tone management system. The overall configuration of the offset printing machine according to the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIG. 8 and members having the same functions as those described in the first embodiment may be used. The description which attaches | subjects the same code | symbol and overlaps is abbreviate | omitted.

  In the offset printing press having the color tone management system of the fifth embodiment, as shown in FIG. 8, the four printing units 101, 201, 301, 401 have ink supply devices 102, 202, 302, 402, respectively. The ink keys 105, 205, 305, and 405 provided as described above can adjust the ink supply amount for each of a plurality of ink key zones (30 zones in the present embodiment) partitioned in the printing width direction.

  In the color management system of the present embodiment, the color of the test sheet that has been test printed is measured, the color based on the image information of the printed pattern is compared with the color of the test sheet, the color adjustment amount is set, and printing is performed. Select the ink key zone for color adjustment from the image corresponding to the design, set the correction color adjustment amount by entering the indicated value for the selected ink key zone, and based on the color adjustment amount and the correction color adjustment amount Thus, the ink supply amount in the ink key zone is changed.

  In this case, when the operator corrects the color adjustment for the test sheet that has been test-printed, if an instruction value for color adjustment is input, for each ink component of all selected ink key zones for color adjustment. The ink supply amount for each ink component is calculated by automatically calculating the increase / decrease amount and adding the increase / decrease amount for each ink component to the supply amount for each ink component set based on the printing standard data (image information). Is set.

  That is, in the apparatus configuration of the color tone management system in the offset printing machine of this embodiment, as shown in FIG. 16, the ink control apparatus 11 is connected to the printing units 101, 201, 301, 401 via the first parallel pass line P1. Connected, it is possible to control the ink key opening by the ink keys 105, 205, 305, 405 (ink key opening controller) and the rotation speed of the ink original rollers 103, 203, 303, 403 (ink original roller rotation controller). . The ink control device 11 has an arithmetic device 12 that controls the ink supply amount by setting a color adjustment amount for each ink key zone. The arithmetic device 12 includes a LAN board 13, a database 14, and an input device. An output port 15 is connected. The arithmetic unit 12 includes a reference ink supply amount setting unit 16, an ink increase / decrease amount setting unit 17, an ink increase / decrease amount addition unit 18, and an ink supply amount control unit 19. An adjustment amount setting unit 20 and a correction color adjustment amount setting unit 21 are provided.

  The ink control device 11 includes a color tone measuring device 27 that measures the color tone of a test sheet that has been trial printed by an operator, and an operation device 91 that allows the operator to remotely operate the arithmetic device 12 and the like to control the ink supply amount. is doing. The ink control device 11 is connected to a CIP3 (Cooperation for Integration of Prepress, Press, Postpress) server 24 and a RIP (Raster Image Processor) 25 via a second parallel pass line P2. The CIP3 server 24 outputs PPF data including the image line ratio of the print image to the ink control device 11 through the second pass line P2 in order to set the ink supply amount of the offset printing press. The RIP 25 replaces print image data with halftone dot data, and passes this halftone dot data to the CIP3 server 24 to create PPF data.

  This color tone measuring device 27 is a colorimeter, and as colorimetric values, color values L value, a value, b value, H value, density values Dc, Dm, Dy, Dk in the CIELAB color space, and spectral values. The reflectance R (λ) can be measured, and color values L, a, b, and H are used for color adjustment. The color tone measuring device (colorimeter) 27 can measure up to a wavelength of 760 mm or more, and separates black (K) from indigo (C), red (M), and yellow (Y). It becomes possible to control the mixed color halftone dot portion including this black (K). This color tone measuring device (colorimeter) 27 can measure the color tone of the test sheet that has been trial-printed by the operator, outputs the measurement result to the arithmetic device 12, and transmits it to the operation device 23 for display. be able to.

  In addition, as shown in FIG. 17, the operation device 91 is a touch panel type display that can be operated by touching the screen with a fingertip, and displays a printed picture image based on PPF data divided into ink key zones. An image display screen 31 to display, a color adjustment amount display screen 32 to display the set color adjustment amount for each ink key zone, and a color adjustment amount operation to perform the color adjustment amount and display the measurement result measured by the color tone measuring device 27 And a screen 92.

  The image display screen 31 can display a print image based on the PPF data. In this case, the ink keys 105, 205, 305, and 405 of the ink supply devices 102, 202, 302, and 402 adjust the ink supply amount for each of the 30 ink key zones that are partitioned in the print width direction. An auxiliary line dividing 30 ink key zones is displayed, and ink key zone numbers (NO, 1 to 30) are displayed. Further, on the side of the image display screen 31, sheet selection switches 34a and 34b for selecting the front and back of the print sheet, and black (K), indigo (C), red (M), and four ink colors are provided. A color selection switch 35 for displaying an image alone in yellow (Y) is provided. Further, on the side of the image display screen 31, a representative color selection switch 53 for selecting a representative image (representative color) in the image displayed on the image display screen 31 is provided, and the selected representative color is stored. The five representative color display parts (storage parts) 54a, 54b, 54c, 54d and 54e are provided.

  Therefore, for example, an image in which a large number of fruits are put in a basket is displayed on the image display screen 31, and when it is desired to adjust the color of a specific fruit in the image of the fruits, the operator uses his fingertip. By touching and selecting ink key zones NO, 7 to 14 where the fruit whose color is desired to be adjusted is selected, an ink key zone for color adjustment can be set. Then, when it is desired to adjust the color of a specific part of the fruit, the representative color selection switch 53 is touched, and then the specific part (representative image) of the fruit is touched with a fingertip, so that the image of the specific part is 5 It can be displayed and stored in one of the two representative color display portions 54a, 54b, 54c, 54d, 54e. In this case, five representative images can be stored. Further, even if the representative color selection switch 53 is touched after touching a specific portion (representative image) of the fruit with the fingertip, the image of this specific portion is displayed on the representative color display portions 54a, 54b, 54c, 54d, 54e. It can be displayed and stored.

  The color adjustment amount display screen 92 can be switched between a screen for performing the color adjustment amount and a screen for displaying the measurement result measured by the color tone measuring device 27. The screen for performing the color adjustment amount is, for example, as described above. Since the color adjustment amount display screens 33, 52, and 82 described in the first to third embodiments are not described here. On the other hand, the screen for displaying the measurement result of the tone measuring device 27 on the color adjustment amount display screen 92 is the screen shown in FIG.

  That is, the color adjustment amount display screen 92 displays a color tone table 93 in each ink key zone NO, 1 to 29 as a measurement result of the color tone measuring device 27. As the color tone, for example, color value L value, a value, b value, H value, density values Dc, Dm, Dy, Dk, spectral reflectance R (λ), and the like can be displayed. A colorimeter switch 94 is provided in the upper part of the color tone table 93, and a correction switch 95, a target value switch 96, a file switch 97, a registration switch 98, a reset switch 99, and a transmission switch 100 are provided in the lower part. Is provided.

  Accordingly, the operator operates the colorimeter switch 94 and then selects a plurality of ink key zones, for example, ink key zones NO, 5, 14, 20, and 26, using the handy color tone measuring device 27, and sequentially measures them. Then, ON is displayed in the measurement columns of the ink key zones NO, 5, 14, 20, and 26, while OFF display is performed in the measurement columns of the other ink key zones. In addition, the measured numerical values are displayed in the measurement result columns of the ink key zones NO, 5, 14, 20, and 26. When the correction switch 95 is operated in this state, the color tone of the ink key zone that has not been measured is input by interpolation processing with respect to the color tone of the measured ink key zones NO, 5, 14, 20, and 26. Thereafter, when the file switch 97 is operated, the color tone table 93 is stored. When the registration switch 98 is operated, the data of the color tone table 93 is reflected on the color adjustment amount display screen 92. When the reset switch 99 is operated, the data of the color tone table 93 is displayed. When the transmission switch 100 is operated after being erased, the data of the color tone table 93 displayed on the color adjustment amount display screen 92 is collectively transmitted to the arithmetic unit 12.

  Note that the processing of the ink control device 11 controlled by the operation device 91 is the same as that in each of the embodiments described above, and thus detailed description thereof is omitted.

  Hereinafter, an ink supply amount control method using the ink control device 11 in the color tone management system of the offset printing machine according to the present embodiment will be described with reference to the flowchart of FIG.

  In the ink supply amount control method by the ink control device 11, as shown in FIG. 18, when preparations before printing such as attachment of the printing plate to the plate cylinder and pre-inking are completed in step S71, the illustration is made in step S72. By operating a trial printing switch that does not, a trial printing of an image set based on the PPF data is performed. When the trial printing is completed, in step S73, the operator visually evaluates the test sheet S that has been trial printed, and determines whether or not a color adjustment operation is necessary. If it is determined that the color adjustment operation is unnecessary, the process proceeds to step S88, and a main printing switch (not shown) is operated to perform the main printing. On the other hand, if it is determined that the color adjustment work is necessary, the color adjustment work for the test sheet S is started in step S74 and subsequent steps.

  First, in step S74, the operator determines whether or not color adjustment based on the color tone measured by the color tone measuring device 27 is necessary, and determines that color adjustment based on the color tone measured by the color tone measuring device 27 is unnecessary. In step S78, the process proceeds to step S78. On the other hand, when the operator determines that the color adjustment based on the color tone measured by the color tone measuring device 27 is necessary, the color tone of the test sheet S is adjusted using the color tone measuring device (colorimeter) 27 in step S75. measure. That is, a specific ink key zone is selected using the handy color tone measuring device 27 and measured in order, and the color tone of all ink key zones is obtained by interpolation processing. In step S76, the color adjustment amount setting unit 20 of the arithmetic device 12 compares the target color tone set based on the PPF data with the color tone of the test sheet S measured by the color tone measuring device 27. The difference between the two is calculated, and in step S77, the color adjustment amount is set from the difference between the target color tone set based on the PPF data and the color tone of the test sheet S measured by the color tone measuring device 22.

  Next, in step S78, the operator determines whether or not visual color adjustment is necessary. If it is determined that visual color adjustment is not necessary, the operator proceeds to step S74. On the other hand, when the operator determines that color adjustment by visual observation is necessary, the image set based on the PPF data is displayed on the image display screen 31 of the operation device 91 in step S79. In step S80, the operator selects an ink key zone in which the image to be adjusted exists in the displayed image. In step S81, the operator uses the fingertip to adjust the color adjustment amount operation screen 92 (the color shown in FIG. 4). By touching the adjustment amount operation screen 33), an instruction value for color adjustment is input. Then, the adjustment amount of each ink color is displayed on the display units 36, 37, 38, and 39 of the color adjustment amount display screen 32. In step S82, the correction color adjustment amount setting unit 21 of the arithmetic unit 12 performs visual correction. Set the color adjustment amount.

  In step S83, it is determined whether or not there is a place to perform color adjustment other than the specific picture. If there is another place to perform color adjustment, the process returns to step S79 and the same operation as described above is performed. On the other hand, if there is no other color adjustment portion in step S83, the target color tone set based on the PPF data and the test sheet S measured by the color tone measuring device 27 are determined in step 84. For the color adjustment amount set based on the difference from the color tone, a process of replacing the correction color adjustment amount set visually is executed.

  In step S85, the arithmetic unit 12 calculates an ink increase / decrease amount for each ink component corresponding to the plurality of ink key zones selected based on the color adjustment instruction value, and for each ink component in each ink key zone. The ink increase / decrease amount is added to the ink supply amount to change the ink supply amount for each ink component. Then, the opening change amount of the ink key 105, 205, 305, 405 in the ink key zone is calculated according to the ink supply amount for each ink component, and the ink key opening is set. In step S86, the transmission switch 100 is operated to transmit the set ink key opening in a batch. In step S87, the ink key openings of a number of ink keys 105, 205, 305, and 405 in each of the ink supply devices 102, 202, 302, and 402 are changed based on the changed ink key openings for each ink component.

  Thereafter, the process returns to step S72, and the operator performs test printing by operating the test printing button. In this trial printing operation, the ink key opening controller and the ink source roller rotation controller of each ink supply apparatus 102, 202, 302, 402 are controlled by the ink supply amount changed in the color adjustment operation, and the printing units 101, 201, 301 are controlled. , 401 is operated.

  When the second trial printing is completed, in step S73, the operator visually evaluates the test sheet S that has been trial printed, and determines whether or not a color adjustment operation is necessary. Here, when it is determined that the color adjustment work is necessary again for the test sheet S that has been test-printed, as described above, the color adjustment work of the test sheet S is started in step S74 and thereafter. When it is determined that the color adjustment work is not necessary for the test sheet S that has been trial printed, the process proceeds to step S88 to perform the main printing, and the work is completed.

  As described above, in the offset printing press having the color tone management system according to the fifth embodiment, the color tone measuring device (color measuring device) 27 for measuring the color tone of the test sheet S is provided, and the arithmetic device 12 is based on the PPF data. A color adjustment amount is set from the set target color tone and the color tone of the test sheet S measured by the color tone measuring device 27, and the ink key zone selected by the operator is visually adjusted using the operation device 91. The correction color adjustment amount is set, and the ink supply amount in the ink key zone is changed based on the color adjustment amount and the correction color adjustment amount.

  Accordingly, the color adjustment amount is set from the target color tone set based on the PPF data and the color tone of the test sheet S measured by the color tone measuring device 27, and the operation device 91 is set for the ink key zone selected by the operator. The correction color adjustment amount is set by visual inspection using the, and the ink supply amount is changed based on the color adjustment amount and the correction color adjustment amount. With respect to the color adjustment amount based on the color tone of the test sheet S, Only the selected predetermined ink key zone can be set to the correction color adjustment amount according to the instruction value of the operator. At this time, if the color adjustment amount is indicated for the selected ink area, the ink component in the ink area is set. The adjustment amount for each ink area is automatically set, and the ink supply amount for each of the plurality of ink areas partitioned in the print width direction can be adjusted in detail and easily. It can be, it is possible to improve the workability by realizing simplification of color adjustment work, it is possible to reduce the burden on the operator.

  In this embodiment, the colorimeter 27 is applied as the color tone measuring device. Since this colorimeter 27 is a handy type, it can save space and speed, and can ensure high measurement accuracy by measuring using a deflection filter. The measurement location can be selected by judging the scratches or dust on the test sheet S.

  Further, the colorimeter 27 can be used to measure a wavelength of 760 mm or more, and a colorimeter capable of separating black (K) from indigo (C), red (M), and yellow (Y) is used. Is preferred. Specifically, by using a colorimeter with a built-in IRGB densitometer that can detect and detect the reflection density of black with infrared rays, the measured data of indigo, red and yellow are independent from the measured data of indigo, red and yellow from the printed image on the test sheet. By detecting the density as the color tone of the black color, the halftone density of each color can be measured with higher accuracy, so that it is possible to control the mixed color halftone dot portion including the black ink (K) with high accuracy. The ink supply amount used for printing by the unit can be accurately grasped.

  The printing press according to the present invention measures the color tone of a test sheet by a color tone measuring device, sets the color adjustment amount by comparing the color tone based on the image information of the printed pattern and the color tone of the test sheet, Select the ink key zone for color adjustment from the corresponding image, and enter the indicated value for the selected ink key zone to set the correction color adjustment amount. Based on the color adjustment amount and the correction color adjustment amount, the ink key The ink supply amount in the zone is changed and can be applied to any printing machine.

It is a schematic block diagram of the color tone management system which concerns on Example 1 of this invention. 1 is an external view of a color tone measuring device in a color tone management system of Embodiment 1. FIG. 1 is an external view of an operating device in a color tone management system of Embodiment 1. FIG. FIG. 3 is a schematic diagram illustrating an operation screen in the ink control device of the color management system according to the first exemplary embodiment. FIG. 3 is a process block diagram of ink supply amount control for each ink key zone of the ink control apparatus according to the first embodiment. It is a graph showing the ink key opening change amount with respect to a line drawing rate. 3 is a flowchart of ink supply amount control of an ink control device in a printing press having the color tone management system of Embodiment 1. 1 is a schematic configuration diagram of an offset printing machine to which a printing machine having a color tone management system of Example 1 is applied. It is the schematic showing the operation screen in the ink control apparatus of the color tone management system which concerns on Example 2 of this invention. FIG. 6 is a schematic configuration diagram of an ink control device of a color tone management system according to a second embodiment. 6 is a flowchart of ink supply amount control of an ink control device in a printing press having a color tone management system according to a second embodiment. It is the schematic showing the operation screen in the ink control apparatus of the color tone management system which concerns on Example 3 of this invention. 10 is a flowchart of ink supply amount control of an ink control device in a printing press having a color tone management system according to a third embodiment. It is a schematic block diagram of the color tone management system which concerns on Example 4 of this invention. 6 is an external view of a color tone measuring device in a color tone management system according to Embodiment 2. FIG. It is a schematic block diagram of the color tone management system which concerns on Example 5 of this invention. FIG. 10 is a schematic diagram illustrating an operation screen in the ink control device of the color tone management system according to the fifth exemplary embodiment. 10 is a flowchart of ink supply amount control of an ink control device in a printing press having a color tone management system according to a fifth embodiment. It is a flowchart of ink supply amount control of the ink control apparatus in the conventional printing machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Ink control apparatus 12 Arithmetic unit 16 Reference | standard ink supply amount setting part 17 Ink increase / decrease amount setting part 18 Ink increase / decrease amount addition part 19 Ink supply amount control part (ink change amount change means)
20 color adjustment amount setting unit 21 correction color adjustment amount setting unit 22, 26, 27 color tone measuring device 23, 51, 81, 91 operation device (display means)
31 Image display screen (color adjustment ink area selection means, image display section)
32 color adjustment amount display screen (color adjustment ink area selection means)
33, 52, 82, 92 Color adjustment amount operation screen 101, 201, 301, 401 Printing unit 102, 202, 302, 402 Ink supply device 105, 205, 305, 405 Ink key 106, 206, 306, 406 Blanket 107, 207 , 307,407 Plate cylinder 108,208,308,408 Impression cylinder

Claims (11)

  Color tone measuring means for measuring the color tone of the test sheet, and color adjustment amount setting means for setting the color adjustment amount by comparing the color tone based on the image information of the printed pattern and the color tone of the test sheet measured by the color tone measuring means. A color adjustment ink area selection means for selecting an ink area for color adjustment from an image corresponding to the printed pattern, and a correction for setting a correction color adjustment amount of the ink area selected by the color adjustment ink area selection means Ink supply for changing the ink supply amount in the ink area based on the color adjustment amount setting means, the color adjustment amount set by the color adjustment amount setting means, and the correction color adjustment amount set by the correction color adjustment amount setting means A color management system characterized by comprising a quantity changing means.   The color management system according to claim 1, wherein the color adjustment ink area selection unit selects a plurality of ink areas for color adjustment from an image corresponding to a print pattern, and the correction color adjustment amount setting unit includes the correction color adjustment amount setting unit. A color tone management system, wherein correction color adjustment amounts for a plurality of ink areas selected by a color adjustment ink area selection unit are set based on an instruction value.   3. The color tone management system according to claim 1, wherein the ink supply amount changing unit replaces the color adjustment amount set by the color adjustment amount setting unit with a correction color adjustment amount set by the correction color adjustment amount setting unit. The color management system is characterized by changing the ink supply amount.   4. The color management system according to claim 1, wherein the color measurement unit measures a color based on a color patch row of a test sheet or a printed pattern of the test sheet. system.   4. The color management system according to claim 1, wherein the color measurement unit measures colorimetric values of a plurality of ink regions in a printed pattern of a test sheet, and measures all the ink regions by interpolation processing. 5. A color management system characterized by obtaining color values.   6. The color management system according to claim 1, further comprising image display means for displaying an image based on image information of a printed pattern, wherein the color adjustment ink area selecting means is the image display means. A color management system, wherein an ink area for color adjustment is selected from an image displayed by.   In the color tone management system according to any one of claims 1 to 6, the ink supply amount changing means includes a color adjustment amount of the ink area selected by the color adjustment ink area selection means, an indication value, A color tone management system that is set for each ink region based on the image line rate and the rotation speed of the ink base roller.   8. The color tone management system according to claim 1, wherein the color tone measurement unit measures a color tone of black and the adjustment amount is set based on the measurement result. system.   On the test sheet measured by the color tone measuring means for measuring the color tone of the color adjustment dedicated pattern printed on the test sheet, the target color value based on the image information used for printing the color adjustment dedicated pattern, and the color tone measuring means Select the color adjustment amount setting means to set the color adjustment amount by comparing the color tone of the printed color adjustment dedicated pattern, and select the ink area for color adjustment from the image corresponding to the printed pattern printed on the test sheet Set by the color adjustment amount setting means, the correction color adjustment amount setting means for setting the correction color adjustment amount of the ink area selected by the color adjustment ink area selection means, and the color adjustment amount setting means. Ink supply amount changing means for changing the ink supply amount in the ink region based on the color adjustment amount and the correction color adjustment amount set by the correction color adjustment amount setting means Color management system to.   Color tone measuring means for measuring the color tone of a test sheet, and a reference color adjustment amount for setting a reference color adjustment amount by comparing the color tone based on the image information of the printed pattern and the color tone of the test sheet measured by the color tone measuring means Setting means, color adjustment ink area selection means for selecting an ink area for color adjustment from an image corresponding to the printed pattern, and a correction color adjustment amount for the ink area selected by the color adjustment ink area selection means Correction color adjustment amount setting means to perform, the reference color adjustment amount set by the reference color adjustment amount setting means, and the correction color adjustment amount set by the correction color adjustment amount setting means, the ink supply amount in the ink region An ink supply amount changing means to be changed, and an ink supply amount that can be adjusted for each ink area based on the ink supply amount changed by the ink supply amount changing means. Printing machine, characterized in that it comprises a supply means.   Measure the color tone of the test sheet, compare the color tone based on the image information of the printed pattern and the color tone of the test sheet, set the reference color adjustment amount, and select the ink area for color adjustment from the image corresponding to the printed pattern Set the correction color adjustment amount for the selected ink region, change the ink supply amount in the ink region based on the reference color adjustment amount and the correction color adjustment amount, and change the ink supply amount for each ink region based on the changed ink supply amount A printing method characterized by adjusting an ink supply amount.

Images